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Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * Driver for OHCI 1394 controllers
Kristian Høgsberged568912006-12-19 19:58:35 -05003 *
Kristian Høgsberged568912006-12-19 19:58:35 -05004 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
Stefan Richtere524f6162007-08-20 21:58:30 +020021#include <linux/compiler.h>
Kristian Høgsberged568912006-12-19 19:58:35 -050022#include <linux/delay.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020023#include <linux/device.h>
Andrew Mortoncf3e72f2006-12-27 14:36:37 -080024#include <linux/dma-mapping.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +020025#include <linux/firewire.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020026#include <linux/firewire-constants.h>
Stefan Richterc26f0232007-08-20 21:40:30 +020027#include <linux/gfp.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020028#include <linux/init.h>
29#include <linux/interrupt.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020030#include <linux/io.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020031#include <linux/kernel.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020032#include <linux/list.h>
Al Virofaa2fb42007-05-15 20:36:10 +010033#include <linux/mm.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020034#include <linux/module.h>
Stefan Richterad3c0fe2008-03-20 22:04:36 +010035#include <linux/moduleparam.h>
Stefan Richtera7fb60d2007-08-20 21:41:22 +020036#include <linux/pci.h>
Stefan Richterfc383792009-08-28 13:25:15 +020037#include <linux/pci_ids.h>
Stefan Richterc26f0232007-08-20 21:40:30 +020038#include <linux/spinlock.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020039#include <linux/string.h>
Andrew Mortoncf3e72f2006-12-27 14:36:37 -080040
Stefan Richter3dcdc502009-06-04 21:08:43 +020041#include <asm/atomic.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020042#include <asm/byteorder.h>
Stefan Richterc26f0232007-08-20 21:40:30 +020043#include <asm/page.h>
Stefan Richteree71c2f2007-08-25 14:08:19 +020044#include <asm/system.h>
Kristian Høgsberged568912006-12-19 19:58:35 -050045
Stefan Richterea8d0062008-03-01 02:42:56 +010046#ifdef CONFIG_PPC_PMAC
47#include <asm/pmac_feature.h>
48#endif
49
Stefan Richter77c9a5d2009-06-05 16:26:18 +020050#include "core.h"
51#include "ohci.h"
Kristian Høgsberged568912006-12-19 19:58:35 -050052
Kristian Høgsberga77754a2007-05-07 20:33:35 -040053#define DESCRIPTOR_OUTPUT_MORE 0
54#define DESCRIPTOR_OUTPUT_LAST (1 << 12)
55#define DESCRIPTOR_INPUT_MORE (2 << 12)
56#define DESCRIPTOR_INPUT_LAST (3 << 12)
57#define DESCRIPTOR_STATUS (1 << 11)
58#define DESCRIPTOR_KEY_IMMEDIATE (2 << 8)
59#define DESCRIPTOR_PING (1 << 7)
60#define DESCRIPTOR_YY (1 << 6)
61#define DESCRIPTOR_NO_IRQ (0 << 4)
62#define DESCRIPTOR_IRQ_ERROR (1 << 4)
63#define DESCRIPTOR_IRQ_ALWAYS (3 << 4)
64#define DESCRIPTOR_BRANCH_ALWAYS (3 << 2)
65#define DESCRIPTOR_WAIT (3 << 0)
Kristian Høgsberged568912006-12-19 19:58:35 -050066
67struct descriptor {
68 __le16 req_count;
69 __le16 control;
70 __le32 data_address;
71 __le32 branch_address;
72 __le16 res_count;
73 __le16 transfer_status;
74} __attribute__((aligned(16)));
75
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -050076struct db_descriptor {
77 __le16 first_size;
78 __le16 control;
79 __le16 second_req_count;
80 __le16 first_req_count;
81 __le32 branch_address;
82 __le16 second_res_count;
83 __le16 first_res_count;
84 __le32 reserved0;
85 __le32 first_buffer;
86 __le32 second_buffer;
87 __le32 reserved1;
88} __attribute__((aligned(16)));
89
Kristian Høgsberga77754a2007-05-07 20:33:35 -040090#define CONTROL_SET(regs) (regs)
91#define CONTROL_CLEAR(regs) ((regs) + 4)
92#define COMMAND_PTR(regs) ((regs) + 12)
93#define CONTEXT_MATCH(regs) ((regs) + 16)
Kristian Høgsberg72e318e2007-02-06 14:49:31 -050094
Kristian Høgsberg32b46092007-02-06 14:49:30 -050095struct ar_buffer {
96 struct descriptor descriptor;
97 struct ar_buffer *next;
98 __le32 data[0];
99};
100
Kristian Høgsberged568912006-12-19 19:58:35 -0500101struct ar_context {
102 struct fw_ohci *ohci;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500103 struct ar_buffer *current_buffer;
104 struct ar_buffer *last_buffer;
105 void *pointer;
Kristian Høgsberg72e318e2007-02-06 14:49:31 -0500106 u32 regs;
Kristian Høgsberged568912006-12-19 19:58:35 -0500107 struct tasklet_struct tasklet;
108};
109
Kristian Høgsberg30200732007-02-16 17:34:39 -0500110struct context;
111
112typedef int (*descriptor_callback_t)(struct context *ctx,
113 struct descriptor *d,
114 struct descriptor *last);
David Moorefe5ca632008-01-06 17:21:41 -0500115
116/*
117 * A buffer that contains a block of DMA-able coherent memory used for
118 * storing a portion of a DMA descriptor program.
119 */
120struct descriptor_buffer {
121 struct list_head list;
122 dma_addr_t buffer_bus;
123 size_t buffer_size;
124 size_t used;
125 struct descriptor buffer[0];
126};
127
Kristian Høgsberg30200732007-02-16 17:34:39 -0500128struct context {
Stefan Richter373b2ed2007-03-04 14:45:18 +0100129 struct fw_ohci *ohci;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500130 u32 regs;
David Moorefe5ca632008-01-06 17:21:41 -0500131 int total_allocation;
Stefan Richter373b2ed2007-03-04 14:45:18 +0100132
David Moorefe5ca632008-01-06 17:21:41 -0500133 /*
134 * List of page-sized buffers for storing DMA descriptors.
135 * Head of list contains buffers in use and tail of list contains
136 * free buffers.
137 */
138 struct list_head buffer_list;
139
140 /*
141 * Pointer to a buffer inside buffer_list that contains the tail
142 * end of the current DMA program.
143 */
144 struct descriptor_buffer *buffer_tail;
145
146 /*
147 * The descriptor containing the branch address of the first
148 * descriptor that has not yet been filled by the device.
149 */
150 struct descriptor *last;
151
152 /*
153 * The last descriptor in the DMA program. It contains the branch
154 * address that must be updated upon appending a new descriptor.
155 */
156 struct descriptor *prev;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500157
158 descriptor_callback_t callback;
159
Stefan Richter373b2ed2007-03-04 14:45:18 +0100160 struct tasklet_struct tasklet;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500161};
Kristian Høgsberg30200732007-02-16 17:34:39 -0500162
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400163#define IT_HEADER_SY(v) ((v) << 0)
164#define IT_HEADER_TCODE(v) ((v) << 4)
165#define IT_HEADER_CHANNEL(v) ((v) << 8)
166#define IT_HEADER_TAG(v) ((v) << 14)
167#define IT_HEADER_SPEED(v) ((v) << 16)
168#define IT_HEADER_DATA_LENGTH(v) ((v) << 16)
Kristian Høgsberged568912006-12-19 19:58:35 -0500169
170struct iso_context {
171 struct fw_iso_context base;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500172 struct context context;
David Moore0642b652007-12-19 03:09:18 -0500173 int excess_bytes;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -0500174 void *header;
175 size_t header_length;
Kristian Høgsberged568912006-12-19 19:58:35 -0500176};
177
178#define CONFIG_ROM_SIZE 1024
179
180struct fw_ohci {
181 struct fw_card card;
182
183 __iomem char *registers;
184 dma_addr_t self_id_bus;
185 __le32 *self_id_cpu;
186 struct tasklet_struct bus_reset_tasklet;
Kristian Høgsberge636fe22007-01-26 00:38:04 -0500187 int node_id;
Kristian Høgsberged568912006-12-19 19:58:35 -0500188 int generation;
Stefan Richtere09770d2008-03-11 02:23:29 +0100189 int request_generation; /* for timestamping incoming requests */
Stefan Richter3dcdc502009-06-04 21:08:43 +0200190 atomic_t bus_seconds;
Stefan Richter95984f62008-07-22 18:41:10 +0200191
192 bool use_dualbuffer;
Stefan Richter11bf20a2008-03-01 02:47:15 +0100193 bool old_uninorth;
Stefan Richterd34316a2008-04-12 22:31:25 +0200194 bool bus_reset_packet_quirk;
Kristian Høgsberged568912006-12-19 19:58:35 -0500195
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400196 /*
197 * Spinlock for accessing fw_ohci data. Never call out of
198 * this driver with this lock held.
199 */
Kristian Høgsberged568912006-12-19 19:58:35 -0500200 spinlock_t lock;
201 u32 self_id_buffer[512];
202
203 /* Config rom buffers */
204 __be32 *config_rom;
205 dma_addr_t config_rom_bus;
206 __be32 *next_config_rom;
207 dma_addr_t next_config_rom_bus;
Stefan Richter8e859732009-10-08 00:41:59 +0200208 __be32 next_header;
Kristian Høgsberged568912006-12-19 19:58:35 -0500209
210 struct ar_context ar_request_ctx;
211 struct ar_context ar_response_ctx;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500212 struct context at_request_ctx;
213 struct context at_response_ctx;
Kristian Høgsberged568912006-12-19 19:58:35 -0500214
215 u32 it_context_mask;
216 struct iso_context *it_context_list;
Stefan Richter4817ed22008-12-21 16:39:46 +0100217 u64 ir_context_channels;
Kristian Høgsberged568912006-12-19 19:58:35 -0500218 u32 ir_context_mask;
219 struct iso_context *ir_context_list;
220};
221
Adrian Bunk95688e92007-01-22 19:17:37 +0100222static inline struct fw_ohci *fw_ohci(struct fw_card *card)
Kristian Høgsberged568912006-12-19 19:58:35 -0500223{
224 return container_of(card, struct fw_ohci, card);
225}
226
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500227#define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
228#define IR_CONTEXT_BUFFER_FILL 0x80000000
229#define IR_CONTEXT_ISOCH_HEADER 0x40000000
230#define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000
231#define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000
232#define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000
Kristian Høgsberged568912006-12-19 19:58:35 -0500233
234#define CONTEXT_RUN 0x8000
235#define CONTEXT_WAKE 0x1000
236#define CONTEXT_DEAD 0x0800
237#define CONTEXT_ACTIVE 0x0400
238
Stefan Richter8b7b6af2009-01-20 19:10:58 +0100239#define OHCI1394_MAX_AT_REQ_RETRIES 0xf
Kristian Høgsberged568912006-12-19 19:58:35 -0500240#define OHCI1394_MAX_AT_RESP_RETRIES 0x2
241#define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8
242
Kristian Høgsberged568912006-12-19 19:58:35 -0500243#define OHCI1394_REGISTER_SIZE 0x800
244#define OHCI_LOOP_COUNT 500
245#define OHCI1394_PCI_HCI_Control 0x40
246#define SELF_ID_BUF_SIZE 0x800
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500247#define OHCI_TCODE_PHY_PACKET 0x0e
Kristian Høgsberge364cf42007-02-16 17:34:49 -0500248#define OHCI_VERSION_1_1 0x010010
Kristian Høgsberg0edeefd2007-01-26 00:38:49 -0500249
Kristian Høgsberged568912006-12-19 19:58:35 -0500250static char ohci_driver_name[] = KBUILD_MODNAME;
251
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100252#ifdef CONFIG_FIREWIRE_OHCI_DEBUG
253
Stefan Richtera007bb82008-04-07 22:33:35 +0200254#define OHCI_PARAM_DEBUG_AT_AR 1
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100255#define OHCI_PARAM_DEBUG_SELFIDS 2
Stefan Richtera007bb82008-04-07 22:33:35 +0200256#define OHCI_PARAM_DEBUG_IRQS 4
257#define OHCI_PARAM_DEBUG_BUSRESETS 8 /* only effective before chip init */
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100258
259static int param_debug;
260module_param_named(debug, param_debug, int, 0644);
261MODULE_PARM_DESC(debug, "Verbose logging (default = 0"
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100262 ", AT/AR events = " __stringify(OHCI_PARAM_DEBUG_AT_AR)
Stefan Richtera007bb82008-04-07 22:33:35 +0200263 ", self-IDs = " __stringify(OHCI_PARAM_DEBUG_SELFIDS)
264 ", IRQs = " __stringify(OHCI_PARAM_DEBUG_IRQS)
265 ", busReset events = " __stringify(OHCI_PARAM_DEBUG_BUSRESETS)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100266 ", or a combination, or all = -1)");
267
268static void log_irqs(u32 evt)
269{
Stefan Richtera007bb82008-04-07 22:33:35 +0200270 if (likely(!(param_debug &
271 (OHCI_PARAM_DEBUG_IRQS | OHCI_PARAM_DEBUG_BUSRESETS))))
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100272 return;
273
Stefan Richtera007bb82008-04-07 22:33:35 +0200274 if (!(param_debug & OHCI_PARAM_DEBUG_IRQS) &&
275 !(evt & OHCI1394_busReset))
276 return;
277
Jay Fenlason5ed1f322009-11-17 12:29:17 -0500278 fw_notify("IRQ %08x%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", evt,
Stefan Richter161b96e2008-06-14 14:23:43 +0200279 evt & OHCI1394_selfIDComplete ? " selfID" : "",
280 evt & OHCI1394_RQPkt ? " AR_req" : "",
281 evt & OHCI1394_RSPkt ? " AR_resp" : "",
282 evt & OHCI1394_reqTxComplete ? " AT_req" : "",
283 evt & OHCI1394_respTxComplete ? " AT_resp" : "",
284 evt & OHCI1394_isochRx ? " IR" : "",
285 evt & OHCI1394_isochTx ? " IT" : "",
286 evt & OHCI1394_postedWriteErr ? " postedWriteErr" : "",
287 evt & OHCI1394_cycleTooLong ? " cycleTooLong" : "",
288 evt & OHCI1394_cycle64Seconds ? " cycle64Seconds" : "",
Jay Fenlason5ed1f322009-11-17 12:29:17 -0500289 evt & OHCI1394_cycleInconsistent ? " cycleInconsistent" : "",
Stefan Richter161b96e2008-06-14 14:23:43 +0200290 evt & OHCI1394_regAccessFail ? " regAccessFail" : "",
291 evt & OHCI1394_busReset ? " busReset" : "",
292 evt & ~(OHCI1394_selfIDComplete | OHCI1394_RQPkt |
293 OHCI1394_RSPkt | OHCI1394_reqTxComplete |
294 OHCI1394_respTxComplete | OHCI1394_isochRx |
295 OHCI1394_isochTx | OHCI1394_postedWriteErr |
296 OHCI1394_cycleTooLong | OHCI1394_cycle64Seconds |
Jay Fenlason5ed1f322009-11-17 12:29:17 -0500297 OHCI1394_cycleInconsistent |
Stefan Richter161b96e2008-06-14 14:23:43 +0200298 OHCI1394_regAccessFail | OHCI1394_busReset)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100299 ? " ?" : "");
300}
301
302static const char *speed[] = {
303 [0] = "S100", [1] = "S200", [2] = "S400", [3] = "beta",
304};
305static const char *power[] = {
306 [0] = "+0W", [1] = "+15W", [2] = "+30W", [3] = "+45W",
307 [4] = "-3W", [5] = " ?W", [6] = "-3..-6W", [7] = "-3..-10W",
308};
309static const char port[] = { '.', '-', 'p', 'c', };
310
311static char _p(u32 *s, int shift)
312{
313 return port[*s >> shift & 3];
314}
315
Stefan Richter08ddb2f42008-04-11 00:51:15 +0200316static void log_selfids(int node_id, int generation, int self_id_count, u32 *s)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100317{
318 if (likely(!(param_debug & OHCI_PARAM_DEBUG_SELFIDS)))
319 return;
320
Stefan Richter161b96e2008-06-14 14:23:43 +0200321 fw_notify("%d selfIDs, generation %d, local node ID %04x\n",
322 self_id_count, generation, node_id);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100323
324 for (; self_id_count--; ++s)
325 if ((*s & 1 << 23) == 0)
Stefan Richter161b96e2008-06-14 14:23:43 +0200326 fw_notify("selfID 0: %08x, phy %d [%c%c%c] "
327 "%s gc=%d %s %s%s%s\n",
328 *s, *s >> 24 & 63, _p(s, 6), _p(s, 4), _p(s, 2),
329 speed[*s >> 14 & 3], *s >> 16 & 63,
330 power[*s >> 8 & 7], *s >> 22 & 1 ? "L" : "",
331 *s >> 11 & 1 ? "c" : "", *s & 2 ? "i" : "");
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100332 else
Stefan Richter161b96e2008-06-14 14:23:43 +0200333 fw_notify("selfID n: %08x, phy %d [%c%c%c%c%c%c%c%c]\n",
334 *s, *s >> 24 & 63,
335 _p(s, 16), _p(s, 14), _p(s, 12), _p(s, 10),
336 _p(s, 8), _p(s, 6), _p(s, 4), _p(s, 2));
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100337}
338
339static const char *evts[] = {
340 [0x00] = "evt_no_status", [0x01] = "-reserved-",
341 [0x02] = "evt_long_packet", [0x03] = "evt_missing_ack",
342 [0x04] = "evt_underrun", [0x05] = "evt_overrun",
343 [0x06] = "evt_descriptor_read", [0x07] = "evt_data_read",
344 [0x08] = "evt_data_write", [0x09] = "evt_bus_reset",
345 [0x0a] = "evt_timeout", [0x0b] = "evt_tcode_err",
346 [0x0c] = "-reserved-", [0x0d] = "-reserved-",
347 [0x0e] = "evt_unknown", [0x0f] = "evt_flushed",
348 [0x10] = "-reserved-", [0x11] = "ack_complete",
349 [0x12] = "ack_pending ", [0x13] = "-reserved-",
350 [0x14] = "ack_busy_X", [0x15] = "ack_busy_A",
351 [0x16] = "ack_busy_B", [0x17] = "-reserved-",
352 [0x18] = "-reserved-", [0x19] = "-reserved-",
353 [0x1a] = "-reserved-", [0x1b] = "ack_tardy",
354 [0x1c] = "-reserved-", [0x1d] = "ack_data_error",
355 [0x1e] = "ack_type_error", [0x1f] = "-reserved-",
356 [0x20] = "pending/cancelled",
357};
358static const char *tcodes[] = {
359 [0x0] = "QW req", [0x1] = "BW req",
360 [0x2] = "W resp", [0x3] = "-reserved-",
361 [0x4] = "QR req", [0x5] = "BR req",
362 [0x6] = "QR resp", [0x7] = "BR resp",
363 [0x8] = "cycle start", [0x9] = "Lk req",
364 [0xa] = "async stream packet", [0xb] = "Lk resp",
365 [0xc] = "-reserved-", [0xd] = "-reserved-",
366 [0xe] = "link internal", [0xf] = "-reserved-",
367};
368static const char *phys[] = {
369 [0x0] = "phy config packet", [0x1] = "link-on packet",
370 [0x2] = "self-id packet", [0x3] = "-reserved-",
371};
372
373static void log_ar_at_event(char dir, int speed, u32 *header, int evt)
374{
375 int tcode = header[0] >> 4 & 0xf;
376 char specific[12];
377
378 if (likely(!(param_debug & OHCI_PARAM_DEBUG_AT_AR)))
379 return;
380
381 if (unlikely(evt >= ARRAY_SIZE(evts)))
382 evt = 0x1f;
383
Stefan Richter08ddb2f42008-04-11 00:51:15 +0200384 if (evt == OHCI1394_evt_bus_reset) {
Stefan Richter161b96e2008-06-14 14:23:43 +0200385 fw_notify("A%c evt_bus_reset, generation %d\n",
386 dir, (header[2] >> 16) & 0xff);
Stefan Richter08ddb2f42008-04-11 00:51:15 +0200387 return;
388 }
389
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100390 if (header[0] == ~header[1]) {
Stefan Richter161b96e2008-06-14 14:23:43 +0200391 fw_notify("A%c %s, %s, %08x\n",
392 dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100393 return;
394 }
395
396 switch (tcode) {
397 case 0x0: case 0x6: case 0x8:
398 snprintf(specific, sizeof(specific), " = %08x",
399 be32_to_cpu((__force __be32)header[3]));
400 break;
401 case 0x1: case 0x5: case 0x7: case 0x9: case 0xb:
402 snprintf(specific, sizeof(specific), " %x,%x",
403 header[3] >> 16, header[3] & 0xffff);
404 break;
405 default:
406 specific[0] = '\0';
407 }
408
409 switch (tcode) {
410 case 0xe: case 0xa:
Stefan Richter161b96e2008-06-14 14:23:43 +0200411 fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100412 break;
413 case 0x0: case 0x1: case 0x4: case 0x5: case 0x9:
Stefan Richter161b96e2008-06-14 14:23:43 +0200414 fw_notify("A%c spd %x tl %02x, "
415 "%04x -> %04x, %s, "
416 "%s, %04x%08x%s\n",
417 dir, speed, header[0] >> 10 & 0x3f,
418 header[1] >> 16, header[0] >> 16, evts[evt],
419 tcodes[tcode], header[1] & 0xffff, header[2], specific);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100420 break;
421 default:
Stefan Richter161b96e2008-06-14 14:23:43 +0200422 fw_notify("A%c spd %x tl %02x, "
423 "%04x -> %04x, %s, "
424 "%s%s\n",
425 dir, speed, header[0] >> 10 & 0x3f,
426 header[1] >> 16, header[0] >> 16, evts[evt],
427 tcodes[tcode], specific);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100428 }
429}
430
431#else
432
433#define log_irqs(evt)
Stefan Richter08ddb2f42008-04-11 00:51:15 +0200434#define log_selfids(node_id, generation, self_id_count, sid)
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100435#define log_ar_at_event(dir, speed, header, evt)
436
437#endif /* CONFIG_FIREWIRE_OHCI_DEBUG */
438
Adrian Bunk95688e92007-01-22 19:17:37 +0100439static inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data)
Kristian Høgsberged568912006-12-19 19:58:35 -0500440{
441 writel(data, ohci->registers + offset);
442}
443
Adrian Bunk95688e92007-01-22 19:17:37 +0100444static inline u32 reg_read(const struct fw_ohci *ohci, int offset)
Kristian Høgsberged568912006-12-19 19:58:35 -0500445{
446 return readl(ohci->registers + offset);
447}
448
Adrian Bunk95688e92007-01-22 19:17:37 +0100449static inline void flush_writes(const struct fw_ohci *ohci)
Kristian Høgsberged568912006-12-19 19:58:35 -0500450{
451 /* Do a dummy read to flush writes. */
452 reg_read(ohci, OHCI1394_Version);
453}
454
Stefan Richter53dca512008-12-14 21:47:04 +0100455static int ohci_update_phy_reg(struct fw_card *card, int addr,
456 int clear_bits, int set_bits)
Kristian Høgsberged568912006-12-19 19:58:35 -0500457{
458 struct fw_ohci *ohci = fw_ohci(card);
459 u32 val, old;
460
461 reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr));
Stefan Richter362e9012007-07-12 22:24:19 +0200462 flush_writes(ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -0500463 msleep(2);
464 val = reg_read(ohci, OHCI1394_PhyControl);
465 if ((val & OHCI1394_PhyControl_ReadDone) == 0) {
466 fw_error("failed to set phy reg bits.\n");
467 return -EBUSY;
468 }
469
470 old = OHCI1394_PhyControl_ReadData(val);
471 old = (old & ~clear_bits) | set_bits;
472 reg_write(ohci, OHCI1394_PhyControl,
473 OHCI1394_PhyControl_Write(addr, old));
474
475 return 0;
476}
477
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500478static int ar_context_add_page(struct ar_context *ctx)
Kristian Høgsberged568912006-12-19 19:58:35 -0500479{
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500480 struct device *dev = ctx->ohci->card.device;
481 struct ar_buffer *ab;
Stefan Richterf5101d582008-03-14 00:27:49 +0100482 dma_addr_t uninitialized_var(ab_bus);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500483 size_t offset;
484
Jarod Wilsonbde17092008-03-12 17:43:26 -0400485 ab = dma_alloc_coherent(dev, PAGE_SIZE, &ab_bus, GFP_ATOMIC);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500486 if (ab == NULL)
487 return -ENOMEM;
488
Jay Fenlasona55709b2008-10-22 15:59:42 -0400489 ab->next = NULL;
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400490 memset(&ab->descriptor, 0, sizeof(ab->descriptor));
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400491 ab->descriptor.control = cpu_to_le16(DESCRIPTOR_INPUT_MORE |
492 DESCRIPTOR_STATUS |
493 DESCRIPTOR_BRANCH_ALWAYS);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500494 offset = offsetof(struct ar_buffer, data);
495 ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset);
496 ab->descriptor.data_address = cpu_to_le32(ab_bus + offset);
497 ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset);
498 ab->descriptor.branch_address = 0;
499
Kristian Høgsbergec839e42007-05-22 18:55:48 -0400500 ctx->last_buffer->descriptor.branch_address = cpu_to_le32(ab_bus | 1);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500501 ctx->last_buffer->next = ab;
502 ctx->last_buffer = ab;
503
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400504 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
Kristian Høgsberged568912006-12-19 19:58:35 -0500505 flush_writes(ctx->ohci);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500506
507 return 0;
Kristian Høgsberged568912006-12-19 19:58:35 -0500508}
509
Jay Fenlasona55709b2008-10-22 15:59:42 -0400510static void ar_context_release(struct ar_context *ctx)
511{
512 struct ar_buffer *ab, *ab_next;
513 size_t offset;
514 dma_addr_t ab_bus;
515
516 for (ab = ctx->current_buffer; ab; ab = ab_next) {
517 ab_next = ab->next;
518 offset = offsetof(struct ar_buffer, data);
519 ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
520 dma_free_coherent(ctx->ohci->card.device, PAGE_SIZE,
521 ab, ab_bus);
522 }
523}
524
Stefan Richter11bf20a2008-03-01 02:47:15 +0100525#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
526#define cond_le32_to_cpu(v) \
527 (ohci->old_uninorth ? (__force __u32)(v) : le32_to_cpu(v))
528#else
529#define cond_le32_to_cpu(v) le32_to_cpu(v)
530#endif
531
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500532static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
Kristian Høgsberged568912006-12-19 19:58:35 -0500533{
Kristian Høgsberged568912006-12-19 19:58:35 -0500534 struct fw_ohci *ohci = ctx->ohci;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500535 struct fw_packet p;
536 u32 status, length, tcode;
Stefan Richter43286562008-03-11 21:22:26 +0100537 int evt;
Kristian Høgsberg0edeefd2007-01-26 00:38:49 -0500538
Stefan Richter11bf20a2008-03-01 02:47:15 +0100539 p.header[0] = cond_le32_to_cpu(buffer[0]);
540 p.header[1] = cond_le32_to_cpu(buffer[1]);
541 p.header[2] = cond_le32_to_cpu(buffer[2]);
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500542
543 tcode = (p.header[0] >> 4) & 0x0f;
544 switch (tcode) {
545 case TCODE_WRITE_QUADLET_REQUEST:
546 case TCODE_READ_QUADLET_RESPONSE:
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500547 p.header[3] = (__force __u32) buffer[3];
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500548 p.header_length = 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500549 p.payload_length = 0;
550 break;
551
552 case TCODE_READ_BLOCK_REQUEST :
Stefan Richter11bf20a2008-03-01 02:47:15 +0100553 p.header[3] = cond_le32_to_cpu(buffer[3]);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500554 p.header_length = 16;
555 p.payload_length = 0;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500556 break;
557
558 case TCODE_WRITE_BLOCK_REQUEST:
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500559 case TCODE_READ_BLOCK_RESPONSE:
560 case TCODE_LOCK_REQUEST:
561 case TCODE_LOCK_RESPONSE:
Stefan Richter11bf20a2008-03-01 02:47:15 +0100562 p.header[3] = cond_le32_to_cpu(buffer[3]);
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500563 p.header_length = 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500564 p.payload_length = p.header[3] >> 16;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500565 break;
566
567 case TCODE_WRITE_RESPONSE:
568 case TCODE_READ_QUADLET_REQUEST:
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500569 case OHCI_TCODE_PHY_PACKET:
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500570 p.header_length = 12;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500571 p.payload_length = 0;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500572 break;
Stefan Richterccff9622008-05-31 19:36:06 +0200573
574 default:
575 /* FIXME: Stop context, discard everything, and restart? */
576 p.header_length = 0;
577 p.payload_length = 0;
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500578 }
579
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500580 p.payload = (void *) buffer + p.header_length;
581
582 /* FIXME: What to do about evt_* errors? */
583 length = (p.header_length + p.payload_length + 3) / 4;
Stefan Richter11bf20a2008-03-01 02:47:15 +0100584 status = cond_le32_to_cpu(buffer[length]);
Stefan Richter43286562008-03-11 21:22:26 +0100585 evt = (status >> 16) & 0x1f;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500586
Stefan Richter43286562008-03-11 21:22:26 +0100587 p.ack = evt - 16;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500588 p.speed = (status >> 21) & 0x7;
589 p.timestamp = status & 0xffff;
590 p.generation = ohci->request_generation;
Kristian Høgsberged568912006-12-19 19:58:35 -0500591
Stefan Richter43286562008-03-11 21:22:26 +0100592 log_ar_at_event('R', p.speed, p.header, evt);
Stefan Richterad3c0fe2008-03-20 22:04:36 +0100593
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400594 /*
595 * The OHCI bus reset handler synthesizes a phy packet with
Kristian Høgsberged568912006-12-19 19:58:35 -0500596 * the new generation number when a bus reset happens (see
597 * section 8.4.2.3). This helps us determine when a request
598 * was received and make sure we send the response in the same
599 * generation. We only need this for requests; for responses
600 * we use the unique tlabel for finding the matching
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400601 * request.
Stefan Richterd34316a2008-04-12 22:31:25 +0200602 *
603 * Alas some chips sometimes emit bus reset packets with a
604 * wrong generation. We set the correct generation for these
605 * at a slightly incorrect time (in bus_reset_tasklet).
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400606 */
Stefan Richterd34316a2008-04-12 22:31:25 +0200607 if (evt == OHCI1394_evt_bus_reset) {
608 if (!ohci->bus_reset_packet_quirk)
609 ohci->request_generation = (p.header[2] >> 16) & 0xff;
610 } else if (ctx == &ohci->ar_request_ctx) {
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500611 fw_core_handle_request(&ohci->card, &p);
Stefan Richterd34316a2008-04-12 22:31:25 +0200612 } else {
Kristian Høgsberg2639a6f2007-01-26 00:37:57 -0500613 fw_core_handle_response(&ohci->card, &p);
Stefan Richterd34316a2008-04-12 22:31:25 +0200614 }
Kristian Høgsberged568912006-12-19 19:58:35 -0500615
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500616 return buffer + length + 1;
617}
Kristian Høgsberged568912006-12-19 19:58:35 -0500618
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500619static void ar_context_tasklet(unsigned long data)
620{
621 struct ar_context *ctx = (struct ar_context *)data;
622 struct fw_ohci *ohci = ctx->ohci;
623 struct ar_buffer *ab;
624 struct descriptor *d;
625 void *buffer, *end;
Kristian Høgsberged568912006-12-19 19:58:35 -0500626
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500627 ab = ctx->current_buffer;
628 d = &ab->descriptor;
Kristian Høgsberged568912006-12-19 19:58:35 -0500629
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500630 if (d->res_count == 0) {
631 size_t size, rest, offset;
Jarod Wilson6b842362008-03-25 16:47:16 -0400632 dma_addr_t start_bus;
633 void *start;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500634
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400635 /*
636 * This descriptor is finished and we may have a
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500637 * packet split across this and the next buffer. We
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400638 * reuse the page for reassembling the split packet.
639 */
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500640
641 offset = offsetof(struct ar_buffer, data);
Jarod Wilson6b842362008-03-25 16:47:16 -0400642 start = buffer = ab;
643 start_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500644
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500645 ab = ab->next;
646 d = &ab->descriptor;
647 size = buffer + PAGE_SIZE - ctx->pointer;
648 rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count);
649 memmove(buffer, ctx->pointer, size);
650 memcpy(buffer + size, ab->data, rest);
651 ctx->current_buffer = ab;
652 ctx->pointer = (void *) ab->data + rest;
653 end = buffer + size + rest;
654
655 while (buffer < end)
656 buffer = handle_ar_packet(ctx, buffer);
657
Jarod Wilsonbde17092008-03-12 17:43:26 -0400658 dma_free_coherent(ohci->card.device, PAGE_SIZE,
Jarod Wilson6b842362008-03-25 16:47:16 -0400659 start, start_bus);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500660 ar_context_add_page(ctx);
661 } else {
662 buffer = ctx->pointer;
663 ctx->pointer = end =
664 (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count);
665
666 while (buffer < end)
667 buffer = handle_ar_packet(ctx, buffer);
668 }
Kristian Høgsberged568912006-12-19 19:58:35 -0500669}
670
Stefan Richter53dca512008-12-14 21:47:04 +0100671static int ar_context_init(struct ar_context *ctx,
672 struct fw_ohci *ohci, u32 regs)
Kristian Høgsberged568912006-12-19 19:58:35 -0500673{
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500674 struct ar_buffer ab;
Kristian Høgsberged568912006-12-19 19:58:35 -0500675
Kristian Høgsberg72e318e2007-02-06 14:49:31 -0500676 ctx->regs = regs;
677 ctx->ohci = ohci;
678 ctx->last_buffer = &ab;
Kristian Høgsberged568912006-12-19 19:58:35 -0500679 tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
680
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500681 ar_context_add_page(ctx);
682 ar_context_add_page(ctx);
683 ctx->current_buffer = ab.next;
684 ctx->pointer = ctx->current_buffer->data;
685
Kristian Høgsberg2aef4692007-05-30 19:06:35 -0400686 return 0;
687}
688
689static void ar_context_run(struct ar_context *ctx)
690{
691 struct ar_buffer *ab = ctx->current_buffer;
692 dma_addr_t ab_bus;
693 size_t offset;
694
695 offset = offsetof(struct ar_buffer, data);
Stefan Richter0a9972b2007-06-23 20:28:17 +0200696 ab_bus = le32_to_cpu(ab->descriptor.data_address) - offset;
Kristian Høgsberg2aef4692007-05-30 19:06:35 -0400697
698 reg_write(ctx->ohci, COMMAND_PTR(ctx->regs), ab_bus | 1);
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400699 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN);
Kristian Høgsberg32b46092007-02-06 14:49:30 -0500700 flush_writes(ctx->ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -0500701}
Stefan Richter373b2ed2007-03-04 14:45:18 +0100702
Stefan Richter53dca512008-12-14 21:47:04 +0100703static struct descriptor *find_branch_descriptor(struct descriptor *d, int z)
Jarod Wilsona186b4a2007-12-03 13:43:12 -0500704{
705 int b, key;
706
707 b = (le16_to_cpu(d->control) & DESCRIPTOR_BRANCH_ALWAYS) >> 2;
708 key = (le16_to_cpu(d->control) & DESCRIPTOR_KEY_IMMEDIATE) >> 8;
709
710 /* figure out which descriptor the branch address goes in */
711 if (z == 2 && (b == 3 || key == 2))
712 return d;
713 else
714 return d + z - 1;
715}
716
Kristian Høgsberg30200732007-02-16 17:34:39 -0500717static void context_tasklet(unsigned long data)
718{
719 struct context *ctx = (struct context *) data;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500720 struct descriptor *d, *last;
721 u32 address;
722 int z;
David Moorefe5ca632008-01-06 17:21:41 -0500723 struct descriptor_buffer *desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500724
David Moorefe5ca632008-01-06 17:21:41 -0500725 desc = list_entry(ctx->buffer_list.next,
726 struct descriptor_buffer, list);
727 last = ctx->last;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500728 while (last->branch_address != 0) {
David Moorefe5ca632008-01-06 17:21:41 -0500729 struct descriptor_buffer *old_desc = desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500730 address = le32_to_cpu(last->branch_address);
731 z = address & 0xf;
David Moorefe5ca632008-01-06 17:21:41 -0500732 address &= ~0xf;
733
734 /* If the branch address points to a buffer outside of the
735 * current buffer, advance to the next buffer. */
736 if (address < desc->buffer_bus ||
737 address >= desc->buffer_bus + desc->used)
738 desc = list_entry(desc->list.next,
739 struct descriptor_buffer, list);
740 d = desc->buffer + (address - desc->buffer_bus) / sizeof(*d);
Jarod Wilsona186b4a2007-12-03 13:43:12 -0500741 last = find_branch_descriptor(d, z);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500742
743 if (!ctx->callback(ctx, d, last))
744 break;
745
David Moorefe5ca632008-01-06 17:21:41 -0500746 if (old_desc != desc) {
747 /* If we've advanced to the next buffer, move the
748 * previous buffer to the free list. */
749 unsigned long flags;
750 old_desc->used = 0;
751 spin_lock_irqsave(&ctx->ohci->lock, flags);
752 list_move_tail(&old_desc->list, &ctx->buffer_list);
753 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
754 }
755 ctx->last = last;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500756 }
757}
758
David Moorefe5ca632008-01-06 17:21:41 -0500759/*
760 * Allocate a new buffer and add it to the list of free buffers for this
761 * context. Must be called with ohci->lock held.
762 */
Stefan Richter53dca512008-12-14 21:47:04 +0100763static int context_add_buffer(struct context *ctx)
David Moorefe5ca632008-01-06 17:21:41 -0500764{
765 struct descriptor_buffer *desc;
Stefan Richterf5101d582008-03-14 00:27:49 +0100766 dma_addr_t uninitialized_var(bus_addr);
David Moorefe5ca632008-01-06 17:21:41 -0500767 int offset;
768
769 /*
770 * 16MB of descriptors should be far more than enough for any DMA
771 * program. This will catch run-away userspace or DoS attacks.
772 */
773 if (ctx->total_allocation >= 16*1024*1024)
774 return -ENOMEM;
775
776 desc = dma_alloc_coherent(ctx->ohci->card.device, PAGE_SIZE,
777 &bus_addr, GFP_ATOMIC);
778 if (!desc)
779 return -ENOMEM;
780
781 offset = (void *)&desc->buffer - (void *)desc;
782 desc->buffer_size = PAGE_SIZE - offset;
783 desc->buffer_bus = bus_addr + offset;
784 desc->used = 0;
785
786 list_add_tail(&desc->list, &ctx->buffer_list);
787 ctx->total_allocation += PAGE_SIZE;
788
789 return 0;
790}
791
Stefan Richter53dca512008-12-14 21:47:04 +0100792static int context_init(struct context *ctx, struct fw_ohci *ohci,
793 u32 regs, descriptor_callback_t callback)
Kristian Høgsberg30200732007-02-16 17:34:39 -0500794{
795 ctx->ohci = ohci;
796 ctx->regs = regs;
David Moorefe5ca632008-01-06 17:21:41 -0500797 ctx->total_allocation = 0;
798
799 INIT_LIST_HEAD(&ctx->buffer_list);
800 if (context_add_buffer(ctx) < 0)
Kristian Høgsberg30200732007-02-16 17:34:39 -0500801 return -ENOMEM;
802
David Moorefe5ca632008-01-06 17:21:41 -0500803 ctx->buffer_tail = list_entry(ctx->buffer_list.next,
804 struct descriptor_buffer, list);
805
Kristian Høgsberg30200732007-02-16 17:34:39 -0500806 tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx);
807 ctx->callback = callback;
808
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400809 /*
810 * We put a dummy descriptor in the buffer that has a NULL
Kristian Høgsberg30200732007-02-16 17:34:39 -0500811 * branch address and looks like it's been sent. That way we
David Moorefe5ca632008-01-06 17:21:41 -0500812 * have a descriptor to append DMA programs to.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400813 */
David Moorefe5ca632008-01-06 17:21:41 -0500814 memset(ctx->buffer_tail->buffer, 0, sizeof(*ctx->buffer_tail->buffer));
815 ctx->buffer_tail->buffer->control = cpu_to_le16(DESCRIPTOR_OUTPUT_LAST);
816 ctx->buffer_tail->buffer->transfer_status = cpu_to_le16(0x8011);
817 ctx->buffer_tail->used += sizeof(*ctx->buffer_tail->buffer);
818 ctx->last = ctx->buffer_tail->buffer;
819 ctx->prev = ctx->buffer_tail->buffer;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500820
821 return 0;
822}
823
Stefan Richter53dca512008-12-14 21:47:04 +0100824static void context_release(struct context *ctx)
Kristian Høgsberg30200732007-02-16 17:34:39 -0500825{
826 struct fw_card *card = &ctx->ohci->card;
David Moorefe5ca632008-01-06 17:21:41 -0500827 struct descriptor_buffer *desc, *tmp;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500828
David Moorefe5ca632008-01-06 17:21:41 -0500829 list_for_each_entry_safe(desc, tmp, &ctx->buffer_list, list)
830 dma_free_coherent(card->device, PAGE_SIZE, desc,
831 desc->buffer_bus -
832 ((void *)&desc->buffer - (void *)desc));
Kristian Høgsberg30200732007-02-16 17:34:39 -0500833}
834
David Moorefe5ca632008-01-06 17:21:41 -0500835/* Must be called with ohci->lock held */
Stefan Richter53dca512008-12-14 21:47:04 +0100836static struct descriptor *context_get_descriptors(struct context *ctx,
837 int z, dma_addr_t *d_bus)
Kristian Høgsberg30200732007-02-16 17:34:39 -0500838{
David Moorefe5ca632008-01-06 17:21:41 -0500839 struct descriptor *d = NULL;
840 struct descriptor_buffer *desc = ctx->buffer_tail;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500841
David Moorefe5ca632008-01-06 17:21:41 -0500842 if (z * sizeof(*d) > desc->buffer_size)
843 return NULL;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500844
David Moorefe5ca632008-01-06 17:21:41 -0500845 if (z * sizeof(*d) > desc->buffer_size - desc->used) {
846 /* No room for the descriptor in this buffer, so advance to the
847 * next one. */
848
849 if (desc->list.next == &ctx->buffer_list) {
850 /* If there is no free buffer next in the list,
851 * allocate one. */
852 if (context_add_buffer(ctx) < 0)
853 return NULL;
854 }
855 desc = list_entry(desc->list.next,
856 struct descriptor_buffer, list);
857 ctx->buffer_tail = desc;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500858 }
859
David Moorefe5ca632008-01-06 17:21:41 -0500860 d = desc->buffer + desc->used / sizeof(*d);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400861 memset(d, 0, z * sizeof(*d));
David Moorefe5ca632008-01-06 17:21:41 -0500862 *d_bus = desc->buffer_bus + desc->used;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500863
864 return d;
865}
866
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -0500867static void context_run(struct context *ctx, u32 extra)
Kristian Høgsberg30200732007-02-16 17:34:39 -0500868{
869 struct fw_ohci *ohci = ctx->ohci;
870
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400871 reg_write(ohci, COMMAND_PTR(ctx->regs),
David Moorefe5ca632008-01-06 17:21:41 -0500872 le32_to_cpu(ctx->last->branch_address));
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400873 reg_write(ohci, CONTROL_CLEAR(ctx->regs), ~0);
874 reg_write(ohci, CONTROL_SET(ctx->regs), CONTEXT_RUN | extra);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500875 flush_writes(ohci);
876}
877
878static void context_append(struct context *ctx,
879 struct descriptor *d, int z, int extra)
880{
881 dma_addr_t d_bus;
David Moorefe5ca632008-01-06 17:21:41 -0500882 struct descriptor_buffer *desc = ctx->buffer_tail;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500883
David Moorefe5ca632008-01-06 17:21:41 -0500884 d_bus = desc->buffer_bus + (d - desc->buffer) * sizeof(*d);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500885
David Moorefe5ca632008-01-06 17:21:41 -0500886 desc->used += (z + extra) * sizeof(*d);
887 ctx->prev->branch_address = cpu_to_le32(d_bus | z);
888 ctx->prev = find_branch_descriptor(d, z);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500889
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400890 reg_write(ctx->ohci, CONTROL_SET(ctx->regs), CONTEXT_WAKE);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500891 flush_writes(ctx->ohci);
892}
893
894static void context_stop(struct context *ctx)
895{
896 u32 reg;
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500897 int i;
Kristian Høgsberg30200732007-02-16 17:34:39 -0500898
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400899 reg_write(ctx->ohci, CONTROL_CLEAR(ctx->regs), CONTEXT_RUN);
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500900 flush_writes(ctx->ohci);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500901
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500902 for (i = 0; i < 10; i++) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400903 reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs));
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500904 if ((reg & CONTEXT_ACTIVE) == 0)
Stefan Richterb0068542009-01-05 20:43:23 +0100905 return;
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500906
Stefan Richterb980f5a2007-07-12 22:25:14 +0200907 mdelay(1);
Kristian Høgsbergb8295662007-02-16 17:34:42 -0500908 }
Stefan Richterb0068542009-01-05 20:43:23 +0100909 fw_error("Error: DMA context still active (0x%08x)\n", reg);
Kristian Høgsberg30200732007-02-16 17:34:39 -0500910}
Kristian Høgsberged568912006-12-19 19:58:35 -0500911
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500912struct driver_data {
Kristian Høgsberged568912006-12-19 19:58:35 -0500913 struct fw_packet *packet;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500914};
915
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400916/*
917 * This function apppends a packet to the DMA queue for transmission.
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500918 * Must always be called with the ochi->lock held to ensure proper
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400919 * generation handling and locking around packet queue manipulation.
920 */
Stefan Richter53dca512008-12-14 21:47:04 +0100921static int at_context_queue_packet(struct context *ctx,
922 struct fw_packet *packet)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500923{
Kristian Høgsberged568912006-12-19 19:58:35 -0500924 struct fw_ohci *ohci = ctx->ohci;
Stefan Richter4b6d51e2007-10-21 11:20:07 +0200925 dma_addr_t d_bus, uninitialized_var(payload_bus);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500926 struct driver_data *driver_data;
927 struct descriptor *d, *last;
928 __le32 *header;
Kristian Høgsberged568912006-12-19 19:58:35 -0500929 int z, tcode;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500930 u32 reg;
Kristian Høgsberged568912006-12-19 19:58:35 -0500931
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500932 d = context_get_descriptors(ctx, 4, &d_bus);
933 if (d == NULL) {
934 packet->ack = RCODE_SEND_ERROR;
935 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -0500936 }
937
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400938 d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500939 d[0].res_count = cpu_to_le16(packet->timestamp);
940
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400941 /*
942 * The DMA format for asyncronous link packets is different
Kristian Høgsberged568912006-12-19 19:58:35 -0500943 * from the IEEE1394 layout, so shift the fields around
944 * accordingly. If header_length is 8, it's a PHY packet, to
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400945 * which we need to prepend an extra quadlet.
946 */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500947
948 header = (__le32 *) &d[1];
Jay Fenlasonf8c22872009-03-05 19:08:40 +0100949 switch (packet->header_length) {
950 case 16:
951 case 12:
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500952 header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
953 (packet->speed << 16));
954 header[1] = cpu_to_le32((packet->header[1] & 0xffff) |
955 (packet->header[0] & 0xffff0000));
956 header[2] = cpu_to_le32(packet->header[2]);
Kristian Høgsberged568912006-12-19 19:58:35 -0500957
958 tcode = (packet->header[0] >> 4) & 0x0f;
959 if (TCODE_IS_BLOCK_PACKET(tcode))
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500960 header[3] = cpu_to_le32(packet->header[3]);
Kristian Høgsberged568912006-12-19 19:58:35 -0500961 else
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500962 header[3] = (__force __le32) packet->header[3];
963
964 d[0].req_count = cpu_to_le16(packet->header_length);
Jay Fenlasonf8c22872009-03-05 19:08:40 +0100965 break;
966
967 case 8:
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500968 header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) |
969 (packet->speed << 16));
970 header[1] = cpu_to_le32(packet->header[0]);
971 header[2] = cpu_to_le32(packet->header[1]);
972 d[0].req_count = cpu_to_le16(12);
Jay Fenlasonf8c22872009-03-05 19:08:40 +0100973 break;
974
975 case 4:
976 header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
977 (packet->speed << 16));
978 header[1] = cpu_to_le32(packet->header[0] & 0xffff0000);
979 d[0].req_count = cpu_to_le16(8);
980 break;
981
982 default:
983 /* BUG(); */
984 packet->ack = RCODE_SEND_ERROR;
985 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -0500986 }
987
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500988 driver_data = (struct driver_data *) &d[3];
989 driver_data->packet = packet;
Kristian Høgsberg20d11672007-03-26 19:18:19 -0400990 packet->driver_data = driver_data;
Jarod Wilsona186b4a2007-12-03 13:43:12 -0500991
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500992 if (packet->payload_length > 0) {
993 payload_bus =
994 dma_map_single(ohci->card.device, packet->payload,
995 packet->payload_length, DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700996 if (dma_mapping_error(ohci->card.device, payload_bus)) {
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -0500997 packet->ack = RCODE_SEND_ERROR;
998 return -1;
999 }
Stefan Richter19593ff2009-10-14 20:40:10 +02001000 packet->payload_bus = payload_bus;
1001 packet->payload_mapped = true;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001002
1003 d[2].req_count = cpu_to_le16(packet->payload_length);
1004 d[2].data_address = cpu_to_le32(payload_bus);
1005 last = &d[2];
1006 z = 3;
1007 } else {
1008 last = &d[0];
1009 z = 2;
1010 }
1011
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001012 last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
1013 DESCRIPTOR_IRQ_ALWAYS |
1014 DESCRIPTOR_BRANCH_ALWAYS);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001015
Jarod Wilson76f73ca2008-04-07 22:32:33 +02001016 /*
1017 * If the controller and packet generations don't match, we need to
1018 * bail out and try again. If IntEvent.busReset is set, the AT context
1019 * is halted, so appending to the context and trying to run it is
1020 * futile. Most controllers do the right thing and just flush the AT
1021 * queue (per section 7.2.3.2 of the OHCI 1.1 specification), but
1022 * some controllers (like a JMicron JMB381 PCI-e) misbehave and wind
1023 * up stalling out. So we just bail out in software and try again
1024 * later, and everyone is happy.
1025 * FIXME: Document how the locking works.
1026 */
1027 if (ohci->generation != packet->generation ||
1028 reg_read(ohci, OHCI1394_IntEventSet) & OHCI1394_busReset) {
Stefan Richter19593ff2009-10-14 20:40:10 +02001029 if (packet->payload_mapped)
Stefan Richterab88ca42007-08-29 19:40:28 +02001030 dma_unmap_single(ohci->card.device, payload_bus,
1031 packet->payload_length, DMA_TO_DEVICE);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001032 packet->ack = RCODE_GENERATION;
1033 return -1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001034 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001035
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001036 context_append(ctx, d, z, 4 - z);
Kristian Høgsberged568912006-12-19 19:58:35 -05001037
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001038 /* If the context isn't already running, start it up. */
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001039 reg = reg_read(ctx->ohci, CONTROL_SET(ctx->regs));
Kristian Høgsberg053b3082007-04-10 18:11:17 -04001040 if ((reg & CONTEXT_RUN) == 0)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001041 context_run(ctx, 0);
Kristian Høgsberged568912006-12-19 19:58:35 -05001042
1043 return 0;
1044}
1045
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001046static int handle_at_packet(struct context *context,
1047 struct descriptor *d,
1048 struct descriptor *last)
1049{
1050 struct driver_data *driver_data;
1051 struct fw_packet *packet;
1052 struct fw_ohci *ohci = context->ohci;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001053 int evt;
1054
1055 if (last->transfer_status == 0)
1056 /* This descriptor isn't done yet, stop iteration. */
1057 return 0;
1058
1059 driver_data = (struct driver_data *) &d[3];
1060 packet = driver_data->packet;
1061 if (packet == NULL)
1062 /* This packet was cancelled, just continue. */
1063 return 1;
1064
Stefan Richter19593ff2009-10-14 20:40:10 +02001065 if (packet->payload_mapped)
Stefan Richter1d1dc5e2008-12-10 00:20:38 +01001066 dma_unmap_single(ohci->card.device, packet->payload_bus,
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001067 packet->payload_length, DMA_TO_DEVICE);
1068
1069 evt = le16_to_cpu(last->transfer_status) & 0x1f;
1070 packet->timestamp = le16_to_cpu(last->res_count);
1071
Stefan Richterad3c0fe2008-03-20 22:04:36 +01001072 log_ar_at_event('T', packet->speed, packet->header, evt);
1073
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001074 switch (evt) {
1075 case OHCI1394_evt_timeout:
1076 /* Async response transmit timed out. */
1077 packet->ack = RCODE_CANCELLED;
1078 break;
1079
1080 case OHCI1394_evt_flushed:
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001081 /*
1082 * The packet was flushed should give same error as
1083 * when we try to use a stale generation count.
1084 */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001085 packet->ack = RCODE_GENERATION;
1086 break;
1087
1088 case OHCI1394_evt_missing_ack:
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001089 /*
1090 * Using a valid (current) generation count, but the
1091 * node is not on the bus or not sending acks.
1092 */
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001093 packet->ack = RCODE_NO_ACK;
1094 break;
1095
1096 case ACK_COMPLETE + 0x10:
1097 case ACK_PENDING + 0x10:
1098 case ACK_BUSY_X + 0x10:
1099 case ACK_BUSY_A + 0x10:
1100 case ACK_BUSY_B + 0x10:
1101 case ACK_DATA_ERROR + 0x10:
1102 case ACK_TYPE_ERROR + 0x10:
1103 packet->ack = evt - 0x10;
1104 break;
1105
1106 default:
1107 packet->ack = RCODE_SEND_ERROR;
1108 break;
1109 }
1110
1111 packet->callback(packet, &ohci->card, packet->ack);
1112
1113 return 1;
1114}
1115
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001116#define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
1117#define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
1118#define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
1119#define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
1120#define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001121
Stefan Richter53dca512008-12-14 21:47:04 +01001122static void handle_local_rom(struct fw_ohci *ohci,
1123 struct fw_packet *packet, u32 csr)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001124{
1125 struct fw_packet response;
1126 int tcode, length, i;
1127
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001128 tcode = HEADER_GET_TCODE(packet->header[0]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001129 if (TCODE_IS_BLOCK_PACKET(tcode))
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001130 length = HEADER_GET_DATA_LENGTH(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001131 else
1132 length = 4;
1133
1134 i = csr - CSR_CONFIG_ROM;
1135 if (i + length > CONFIG_ROM_SIZE) {
1136 fw_fill_response(&response, packet->header,
1137 RCODE_ADDRESS_ERROR, NULL, 0);
1138 } else if (!TCODE_IS_READ_REQUEST(tcode)) {
1139 fw_fill_response(&response, packet->header,
1140 RCODE_TYPE_ERROR, NULL, 0);
1141 } else {
1142 fw_fill_response(&response, packet->header, RCODE_COMPLETE,
1143 (void *) ohci->config_rom + i, length);
1144 }
1145
1146 fw_core_handle_response(&ohci->card, &response);
1147}
1148
Stefan Richter53dca512008-12-14 21:47:04 +01001149static void handle_local_lock(struct fw_ohci *ohci,
1150 struct fw_packet *packet, u32 csr)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001151{
1152 struct fw_packet response;
1153 int tcode, length, ext_tcode, sel;
1154 __be32 *payload, lock_old;
1155 u32 lock_arg, lock_data;
1156
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001157 tcode = HEADER_GET_TCODE(packet->header[0]);
1158 length = HEADER_GET_DATA_LENGTH(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001159 payload = packet->payload;
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001160 ext_tcode = HEADER_GET_EXTENDED_TCODE(packet->header[3]);
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001161
1162 if (tcode == TCODE_LOCK_REQUEST &&
1163 ext_tcode == EXTCODE_COMPARE_SWAP && length == 8) {
1164 lock_arg = be32_to_cpu(payload[0]);
1165 lock_data = be32_to_cpu(payload[1]);
1166 } else if (tcode == TCODE_READ_QUADLET_REQUEST) {
1167 lock_arg = 0;
1168 lock_data = 0;
1169 } else {
1170 fw_fill_response(&response, packet->header,
1171 RCODE_TYPE_ERROR, NULL, 0);
1172 goto out;
1173 }
1174
1175 sel = (csr - CSR_BUS_MANAGER_ID) / 4;
1176 reg_write(ohci, OHCI1394_CSRData, lock_data);
1177 reg_write(ohci, OHCI1394_CSRCompareData, lock_arg);
1178 reg_write(ohci, OHCI1394_CSRControl, sel);
1179
1180 if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000)
1181 lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData));
1182 else
1183 fw_notify("swap not done yet\n");
1184
1185 fw_fill_response(&response, packet->header,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001186 RCODE_COMPLETE, &lock_old, sizeof(lock_old));
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001187 out:
1188 fw_core_handle_response(&ohci->card, &response);
1189}
1190
Stefan Richter53dca512008-12-14 21:47:04 +01001191static void handle_local_request(struct context *ctx, struct fw_packet *packet)
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001192{
1193 u64 offset;
1194 u32 csr;
1195
Kristian Høgsberg473d28c2007-03-07 12:12:55 -05001196 if (ctx == &ctx->ohci->at_request_ctx) {
1197 packet->ack = ACK_PENDING;
1198 packet->callback(packet, &ctx->ohci->card, packet->ack);
1199 }
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001200
1201 offset =
1202 ((unsigned long long)
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001203 HEADER_GET_OFFSET_HIGH(packet->header[1]) << 32) |
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001204 packet->header[2];
1205 csr = offset - CSR_REGISTER_BASE;
1206
1207 /* Handle config rom reads. */
1208 if (csr >= CSR_CONFIG_ROM && csr < CSR_CONFIG_ROM_END)
1209 handle_local_rom(ctx->ohci, packet, csr);
1210 else switch (csr) {
1211 case CSR_BUS_MANAGER_ID:
1212 case CSR_BANDWIDTH_AVAILABLE:
1213 case CSR_CHANNELS_AVAILABLE_HI:
1214 case CSR_CHANNELS_AVAILABLE_LO:
1215 handle_local_lock(ctx->ohci, packet, csr);
1216 break;
1217 default:
1218 if (ctx == &ctx->ohci->at_request_ctx)
1219 fw_core_handle_request(&ctx->ohci->card, packet);
1220 else
1221 fw_core_handle_response(&ctx->ohci->card, packet);
1222 break;
1223 }
Kristian Høgsberg473d28c2007-03-07 12:12:55 -05001224
1225 if (ctx == &ctx->ohci->at_response_ctx) {
1226 packet->ack = ACK_COMPLETE;
1227 packet->callback(packet, &ctx->ohci->card, packet->ack);
1228 }
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001229}
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001230
Stefan Richter53dca512008-12-14 21:47:04 +01001231static void at_context_transmit(struct context *ctx, struct fw_packet *packet)
Kristian Høgsberged568912006-12-19 19:58:35 -05001232{
Kristian Høgsberged568912006-12-19 19:58:35 -05001233 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001234 int ret;
Kristian Høgsberged568912006-12-19 19:58:35 -05001235
1236 spin_lock_irqsave(&ctx->ohci->lock, flags);
1237
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001238 if (HEADER_GET_DESTINATION(packet->header[0]) == ctx->ohci->node_id &&
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001239 ctx->ohci->generation == packet->generation) {
Kristian Høgsberg93c4cce2007-01-26 00:38:26 -05001240 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
1241 handle_local_request(ctx, packet);
1242 return;
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001243 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001244
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001245 ret = at_context_queue_packet(ctx, packet);
Kristian Høgsberged568912006-12-19 19:58:35 -05001246 spin_unlock_irqrestore(&ctx->ohci->lock, flags);
1247
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001248 if (ret < 0)
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001249 packet->callback(packet, &ctx->ohci->card, packet->ack);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001250
Kristian Høgsberged568912006-12-19 19:58:35 -05001251}
1252
1253static void bus_reset_tasklet(unsigned long data)
1254{
1255 struct fw_ohci *ohci = (struct fw_ohci *)data;
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001256 int self_id_count, i, j, reg;
Kristian Høgsberged568912006-12-19 19:58:35 -05001257 int generation, new_generation;
1258 unsigned long flags;
Stefan Richter4eaff7d2007-07-25 19:18:08 +02001259 void *free_rom = NULL;
1260 dma_addr_t free_rom_bus = 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05001261
1262 reg = reg_read(ohci, OHCI1394_NodeID);
1263 if (!(reg & OHCI1394_NodeID_idValid)) {
Stefan Richter02ff8f82007-08-30 00:11:40 +02001264 fw_notify("node ID not valid, new bus reset in progress\n");
Kristian Høgsberged568912006-12-19 19:58:35 -05001265 return;
1266 }
Stefan Richter02ff8f82007-08-30 00:11:40 +02001267 if ((reg & OHCI1394_NodeID_nodeNumber) == 63) {
1268 fw_notify("malconfigured bus\n");
1269 return;
1270 }
1271 ohci->node_id = reg & (OHCI1394_NodeID_busNumber |
1272 OHCI1394_NodeID_nodeNumber);
Kristian Høgsberged568912006-12-19 19:58:35 -05001273
Stefan Richterc8a9a492008-03-19 21:40:32 +01001274 reg = reg_read(ohci, OHCI1394_SelfIDCount);
1275 if (reg & OHCI1394_SelfIDCount_selfIDError) {
1276 fw_notify("inconsistent self IDs\n");
1277 return;
1278 }
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001279 /*
1280 * The count in the SelfIDCount register is the number of
Kristian Høgsberged568912006-12-19 19:58:35 -05001281 * bytes in the self ID receive buffer. Since we also receive
1282 * the inverted quadlets and a header quadlet, we shift one
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001283 * bit extra to get the actual number of self IDs.
1284 */
Stefan Richter928ec5f2009-09-06 18:49:17 +02001285 self_id_count = (reg >> 3) & 0xff;
1286 if (self_id_count == 0 || self_id_count > 252) {
Stefan Richter016bf3d2008-03-19 22:05:02 +01001287 fw_notify("inconsistent self IDs\n");
1288 return;
1289 }
Stefan Richter11bf20a2008-03-01 02:47:15 +01001290 generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
Stefan Richteree71c2f2007-08-25 14:08:19 +02001291 rmb();
Kristian Høgsberged568912006-12-19 19:58:35 -05001292
1293 for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
Stefan Richterc8a9a492008-03-19 21:40:32 +01001294 if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) {
1295 fw_notify("inconsistent self IDs\n");
1296 return;
1297 }
Stefan Richter11bf20a2008-03-01 02:47:15 +01001298 ohci->self_id_buffer[j] =
1299 cond_le32_to_cpu(ohci->self_id_cpu[i]);
Kristian Høgsberged568912006-12-19 19:58:35 -05001300 }
Stefan Richteree71c2f2007-08-25 14:08:19 +02001301 rmb();
Kristian Høgsberged568912006-12-19 19:58:35 -05001302
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001303 /*
1304 * Check the consistency of the self IDs we just read. The
Kristian Høgsberged568912006-12-19 19:58:35 -05001305 * problem we face is that a new bus reset can start while we
1306 * read out the self IDs from the DMA buffer. If this happens,
1307 * the DMA buffer will be overwritten with new self IDs and we
1308 * will read out inconsistent data. The OHCI specification
1309 * (section 11.2) recommends a technique similar to
1310 * linux/seqlock.h, where we remember the generation of the
1311 * self IDs in the buffer before reading them out and compare
1312 * it to the current generation after reading them out. If
1313 * the two generations match we know we have a consistent set
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001314 * of self IDs.
1315 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001316
1317 new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff;
1318 if (new_generation != generation) {
1319 fw_notify("recursive bus reset detected, "
1320 "discarding self ids\n");
1321 return;
1322 }
1323
1324 /* FIXME: Document how the locking works. */
1325 spin_lock_irqsave(&ohci->lock, flags);
1326
1327 ohci->generation = generation;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001328 context_stop(&ohci->at_request_ctx);
1329 context_stop(&ohci->at_response_ctx);
Kristian Høgsberged568912006-12-19 19:58:35 -05001330 reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
1331
Stefan Richterd34316a2008-04-12 22:31:25 +02001332 if (ohci->bus_reset_packet_quirk)
1333 ohci->request_generation = generation;
1334
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001335 /*
1336 * This next bit is unrelated to the AT context stuff but we
Kristian Høgsberged568912006-12-19 19:58:35 -05001337 * have to do it under the spinlock also. If a new config rom
1338 * was set up before this reset, the old one is now no longer
1339 * in use and we can free it. Update the config rom pointers
1340 * to point to the current config rom and clear the
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001341 * next_config_rom pointer so a new udpate can take place.
1342 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001343
1344 if (ohci->next_config_rom != NULL) {
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04001345 if (ohci->next_config_rom != ohci->config_rom) {
1346 free_rom = ohci->config_rom;
1347 free_rom_bus = ohci->config_rom_bus;
1348 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001349 ohci->config_rom = ohci->next_config_rom;
1350 ohci->config_rom_bus = ohci->next_config_rom_bus;
1351 ohci->next_config_rom = NULL;
1352
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001353 /*
1354 * Restore config_rom image and manually update
Kristian Høgsberged568912006-12-19 19:58:35 -05001355 * config_rom registers. Writing the header quadlet
1356 * will indicate that the config rom is ready, so we
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001357 * do that last.
1358 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001359 reg_write(ohci, OHCI1394_BusOptions,
1360 be32_to_cpu(ohci->config_rom[2]));
Stefan Richter8e859732009-10-08 00:41:59 +02001361 ohci->config_rom[0] = ohci->next_header;
1362 reg_write(ohci, OHCI1394_ConfigROMhdr,
1363 be32_to_cpu(ohci->next_header));
Kristian Høgsberged568912006-12-19 19:58:35 -05001364 }
1365
Stefan Richter080de8c2008-02-28 20:54:43 +01001366#ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA
1367 reg_write(ohci, OHCI1394_PhyReqFilterHiSet, ~0);
1368 reg_write(ohci, OHCI1394_PhyReqFilterLoSet, ~0);
1369#endif
1370
Kristian Høgsberged568912006-12-19 19:58:35 -05001371 spin_unlock_irqrestore(&ohci->lock, flags);
1372
Stefan Richter4eaff7d2007-07-25 19:18:08 +02001373 if (free_rom)
1374 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
1375 free_rom, free_rom_bus);
1376
Stefan Richter08ddb2f42008-04-11 00:51:15 +02001377 log_selfids(ohci->node_id, generation,
1378 self_id_count, ohci->self_id_buffer);
Stefan Richterad3c0fe2008-03-20 22:04:36 +01001379
Kristian Høgsberge636fe22007-01-26 00:38:04 -05001380 fw_core_handle_bus_reset(&ohci->card, ohci->node_id, generation,
Kristian Høgsberged568912006-12-19 19:58:35 -05001381 self_id_count, ohci->self_id_buffer);
1382}
1383
1384static irqreturn_t irq_handler(int irq, void *data)
1385{
1386 struct fw_ohci *ohci = data;
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05001387 u32 event, iso_event, cycle_time;
Kristian Høgsberged568912006-12-19 19:58:35 -05001388 int i;
1389
1390 event = reg_read(ohci, OHCI1394_IntEventClear);
1391
Stefan Richtera5159582007-06-09 19:31:14 +02001392 if (!event || !~event)
Kristian Høgsberged568912006-12-19 19:58:35 -05001393 return IRQ_NONE;
1394
Stefan Richtera007bb82008-04-07 22:33:35 +02001395 /* busReset must not be cleared yet, see OHCI 1.1 clause 7.2.3.2 */
1396 reg_write(ohci, OHCI1394_IntEventClear, event & ~OHCI1394_busReset);
Stefan Richterad3c0fe2008-03-20 22:04:36 +01001397 log_irqs(event);
Kristian Høgsberged568912006-12-19 19:58:35 -05001398
1399 if (event & OHCI1394_selfIDComplete)
1400 tasklet_schedule(&ohci->bus_reset_tasklet);
1401
1402 if (event & OHCI1394_RQPkt)
1403 tasklet_schedule(&ohci->ar_request_ctx.tasklet);
1404
1405 if (event & OHCI1394_RSPkt)
1406 tasklet_schedule(&ohci->ar_response_ctx.tasklet);
1407
1408 if (event & OHCI1394_reqTxComplete)
1409 tasklet_schedule(&ohci->at_request_ctx.tasklet);
1410
1411 if (event & OHCI1394_respTxComplete)
1412 tasklet_schedule(&ohci->at_response_ctx.tasklet);
1413
Kristian Høgsbergc8894752007-02-16 17:34:36 -05001414 iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear);
Kristian Høgsberged568912006-12-19 19:58:35 -05001415 reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
1416
1417 while (iso_event) {
1418 i = ffs(iso_event) - 1;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001419 tasklet_schedule(&ohci->ir_context_list[i].context.tasklet);
Kristian Høgsberged568912006-12-19 19:58:35 -05001420 iso_event &= ~(1 << i);
1421 }
1422
Kristian Høgsbergc8894752007-02-16 17:34:36 -05001423 iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear);
Kristian Høgsberged568912006-12-19 19:58:35 -05001424 reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
1425
1426 while (iso_event) {
1427 i = ffs(iso_event) - 1;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001428 tasklet_schedule(&ohci->it_context_list[i].context.tasklet);
Kristian Høgsberged568912006-12-19 19:58:35 -05001429 iso_event &= ~(1 << i);
1430 }
1431
Jarod Wilson75f78322008-04-03 17:18:23 -04001432 if (unlikely(event & OHCI1394_regAccessFail))
1433 fw_error("Register access failure - "
1434 "please notify linux1394-devel@lists.sf.net\n");
1435
Stefan Richtere524f6162007-08-20 21:58:30 +02001436 if (unlikely(event & OHCI1394_postedWriteErr))
1437 fw_error("PCI posted write error\n");
1438
Stefan Richterbb9f2202007-12-22 22:14:52 +01001439 if (unlikely(event & OHCI1394_cycleTooLong)) {
1440 if (printk_ratelimit())
1441 fw_notify("isochronous cycle too long\n");
1442 reg_write(ohci, OHCI1394_LinkControlSet,
1443 OHCI1394_LinkControl_cycleMaster);
1444 }
1445
Jay Fenlason5ed1f322009-11-17 12:29:17 -05001446 if (unlikely(event & OHCI1394_cycleInconsistent)) {
1447 /*
1448 * We need to clear this event bit in order to make
1449 * cycleMatch isochronous I/O work. In theory we should
1450 * stop active cycleMatch iso contexts now and restart
1451 * them at least two cycles later. (FIXME?)
1452 */
1453 if (printk_ratelimit())
1454 fw_notify("isochronous cycle inconsistent\n");
1455 }
1456
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05001457 if (event & OHCI1394_cycle64Seconds) {
1458 cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
1459 if ((cycle_time & 0x80000000) == 0)
Stefan Richter3dcdc502009-06-04 21:08:43 +02001460 atomic_inc(&ohci->bus_seconds);
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05001461 }
1462
Kristian Høgsberged568912006-12-19 19:58:35 -05001463 return IRQ_HANDLED;
1464}
1465
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001466static int software_reset(struct fw_ohci *ohci)
1467{
1468 int i;
1469
1470 reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
1471
1472 for (i = 0; i < OHCI_LOOP_COUNT; i++) {
1473 if ((reg_read(ohci, OHCI1394_HCControlSet) &
1474 OHCI1394_HCControl_softReset) == 0)
1475 return 0;
1476 msleep(1);
1477 }
1478
1479 return -EBUSY;
1480}
1481
Stefan Richter8e859732009-10-08 00:41:59 +02001482static void copy_config_rom(__be32 *dest, const __be32 *src, size_t length)
1483{
1484 size_t size = length * 4;
1485
1486 memcpy(dest, src, size);
1487 if (size < CONFIG_ROM_SIZE)
1488 memset(&dest[length], 0, CONFIG_ROM_SIZE - size);
1489}
1490
1491static int ohci_enable(struct fw_card *card,
1492 const __be32 *config_rom, size_t length)
Kristian Høgsberged568912006-12-19 19:58:35 -05001493{
1494 struct fw_ohci *ohci = fw_ohci(card);
1495 struct pci_dev *dev = to_pci_dev(card->device);
Jarod Wilson02214722008-03-28 10:02:50 -04001496 u32 lps;
1497 int i;
Kristian Høgsberged568912006-12-19 19:58:35 -05001498
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001499 if (software_reset(ohci)) {
1500 fw_error("Failed to reset ohci card.\n");
1501 return -EBUSY;
1502 }
1503
1504 /*
1505 * Now enable LPS, which we need in order to start accessing
1506 * most of the registers. In fact, on some cards (ALI M5251),
1507 * accessing registers in the SClk domain without LPS enabled
1508 * will lock up the machine. Wait 50msec to make sure we have
Jarod Wilson02214722008-03-28 10:02:50 -04001509 * full link enabled. However, with some cards (well, at least
1510 * a JMicron PCIe card), we have to try again sometimes.
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001511 */
1512 reg_write(ohci, OHCI1394_HCControlSet,
1513 OHCI1394_HCControl_LPS |
1514 OHCI1394_HCControl_postedWriteEnable);
1515 flush_writes(ohci);
Jarod Wilson02214722008-03-28 10:02:50 -04001516
1517 for (lps = 0, i = 0; !lps && i < 3; i++) {
1518 msleep(50);
1519 lps = reg_read(ohci, OHCI1394_HCControlSet) &
1520 OHCI1394_HCControl_LPS;
1521 }
1522
1523 if (!lps) {
1524 fw_error("Failed to set Link Power Status\n");
1525 return -EIO;
1526 }
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001527
1528 reg_write(ohci, OHCI1394_HCControlClear,
1529 OHCI1394_HCControl_noByteSwapData);
1530
Stefan Richteraffc9c22008-06-05 20:50:53 +02001531 reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
Stefan Richtere896ec42008-06-05 20:49:38 +02001532 reg_write(ohci, OHCI1394_LinkControlClear,
1533 OHCI1394_LinkControl_rcvPhyPkt);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001534 reg_write(ohci, OHCI1394_LinkControlSet,
1535 OHCI1394_LinkControl_rcvSelfID |
1536 OHCI1394_LinkControl_cycleTimerEnable |
1537 OHCI1394_LinkControl_cycleMaster);
1538
1539 reg_write(ohci, OHCI1394_ATRetries,
1540 OHCI1394_MAX_AT_REQ_RETRIES |
1541 (OHCI1394_MAX_AT_RESP_RETRIES << 4) |
1542 (OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
1543
1544 ar_context_run(&ohci->ar_request_ctx);
1545 ar_context_run(&ohci->ar_response_ctx);
1546
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001547 reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000);
1548 reg_write(ohci, OHCI1394_IntEventClear, ~0);
1549 reg_write(ohci, OHCI1394_IntMaskClear, ~0);
1550 reg_write(ohci, OHCI1394_IntMaskSet,
1551 OHCI1394_selfIDComplete |
1552 OHCI1394_RQPkt | OHCI1394_RSPkt |
1553 OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
1554 OHCI1394_isochRx | OHCI1394_isochTx |
Stefan Richterbb9f2202007-12-22 22:14:52 +01001555 OHCI1394_postedWriteErr | OHCI1394_cycleTooLong |
Jay Fenlason5ed1f322009-11-17 12:29:17 -05001556 OHCI1394_cycleInconsistent |
Jarod Wilson75f78322008-04-03 17:18:23 -04001557 OHCI1394_cycle64Seconds | OHCI1394_regAccessFail |
1558 OHCI1394_masterIntEnable);
Stefan Richtera007bb82008-04-07 22:33:35 +02001559 if (param_debug & OHCI_PARAM_DEBUG_BUSRESETS)
1560 reg_write(ohci, OHCI1394_IntMaskSet, OHCI1394_busReset);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04001561
1562 /* Activate link_on bit and contender bit in our self ID packets.*/
1563 if (ohci_update_phy_reg(card, 4, 0,
1564 PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
1565 return -EIO;
1566
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001567 /*
1568 * When the link is not yet enabled, the atomic config rom
Kristian Høgsberged568912006-12-19 19:58:35 -05001569 * update mechanism described below in ohci_set_config_rom()
1570 * is not active. We have to update ConfigRomHeader and
1571 * BusOptions manually, and the write to ConfigROMmap takes
1572 * effect immediately. We tie this to the enabling of the
1573 * link, so we have a valid config rom before enabling - the
1574 * OHCI requires that ConfigROMhdr and BusOptions have valid
1575 * values before enabling.
1576 *
1577 * However, when the ConfigROMmap is written, some controllers
1578 * always read back quadlets 0 and 2 from the config rom to
1579 * the ConfigRomHeader and BusOptions registers on bus reset.
1580 * They shouldn't do that in this initial case where the link
1581 * isn't enabled. This means we have to use the same
1582 * workaround here, setting the bus header to 0 and then write
1583 * the right values in the bus reset tasklet.
1584 */
1585
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04001586 if (config_rom) {
1587 ohci->next_config_rom =
1588 dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
1589 &ohci->next_config_rom_bus,
1590 GFP_KERNEL);
1591 if (ohci->next_config_rom == NULL)
1592 return -ENOMEM;
Kristian Høgsberged568912006-12-19 19:58:35 -05001593
Stefan Richter8e859732009-10-08 00:41:59 +02001594 copy_config_rom(ohci->next_config_rom, config_rom, length);
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04001595 } else {
1596 /*
1597 * In the suspend case, config_rom is NULL, which
1598 * means that we just reuse the old config rom.
1599 */
1600 ohci->next_config_rom = ohci->config_rom;
1601 ohci->next_config_rom_bus = ohci->config_rom_bus;
1602 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001603
Stefan Richter8e859732009-10-08 00:41:59 +02001604 ohci->next_header = ohci->next_config_rom[0];
Kristian Høgsberged568912006-12-19 19:58:35 -05001605 ohci->next_config_rom[0] = 0;
1606 reg_write(ohci, OHCI1394_ConfigROMhdr, 0);
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04001607 reg_write(ohci, OHCI1394_BusOptions,
1608 be32_to_cpu(ohci->next_config_rom[2]));
Kristian Høgsberged568912006-12-19 19:58:35 -05001609 reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus);
1610
1611 reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000);
1612
1613 if (request_irq(dev->irq, irq_handler,
Thomas Gleixner65efffa2007-03-05 18:19:51 -08001614 IRQF_SHARED, ohci_driver_name, ohci)) {
Kristian Høgsberged568912006-12-19 19:58:35 -05001615 fw_error("Failed to allocate shared interrupt %d.\n",
1616 dev->irq);
1617 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
1618 ohci->config_rom, ohci->config_rom_bus);
1619 return -EIO;
1620 }
1621
1622 reg_write(ohci, OHCI1394_HCControlSet,
1623 OHCI1394_HCControl_linkEnable |
1624 OHCI1394_HCControl_BIBimageValid);
1625 flush_writes(ohci);
1626
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001627 /*
1628 * We are ready to go, initiate bus reset to finish the
1629 * initialization.
1630 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001631
1632 fw_core_initiate_bus_reset(&ohci->card, 1);
1633
1634 return 0;
1635}
1636
Stefan Richter53dca512008-12-14 21:47:04 +01001637static int ohci_set_config_rom(struct fw_card *card,
Stefan Richter8e859732009-10-08 00:41:59 +02001638 const __be32 *config_rom, size_t length)
Kristian Høgsberged568912006-12-19 19:58:35 -05001639{
1640 struct fw_ohci *ohci;
1641 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001642 int ret = -EBUSY;
Kristian Høgsberged568912006-12-19 19:58:35 -05001643 __be32 *next_config_rom;
Stefan Richterf5101d582008-03-14 00:27:49 +01001644 dma_addr_t uninitialized_var(next_config_rom_bus);
Kristian Høgsberged568912006-12-19 19:58:35 -05001645
1646 ohci = fw_ohci(card);
1647
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001648 /*
1649 * When the OHCI controller is enabled, the config rom update
Kristian Høgsberged568912006-12-19 19:58:35 -05001650 * mechanism is a bit tricky, but easy enough to use. See
1651 * section 5.5.6 in the OHCI specification.
1652 *
1653 * The OHCI controller caches the new config rom address in a
1654 * shadow register (ConfigROMmapNext) and needs a bus reset
1655 * for the changes to take place. When the bus reset is
1656 * detected, the controller loads the new values for the
1657 * ConfigRomHeader and BusOptions registers from the specified
1658 * config rom and loads ConfigROMmap from the ConfigROMmapNext
1659 * shadow register. All automatically and atomically.
1660 *
1661 * Now, there's a twist to this story. The automatic load of
1662 * ConfigRomHeader and BusOptions doesn't honor the
1663 * noByteSwapData bit, so with a be32 config rom, the
1664 * controller will load be32 values in to these registers
1665 * during the atomic update, even on litte endian
1666 * architectures. The workaround we use is to put a 0 in the
1667 * header quadlet; 0 is endian agnostic and means that the
1668 * config rom isn't ready yet. In the bus reset tasklet we
1669 * then set up the real values for the two registers.
1670 *
1671 * We use ohci->lock to avoid racing with the code that sets
1672 * ohci->next_config_rom to NULL (see bus_reset_tasklet).
1673 */
1674
1675 next_config_rom =
1676 dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
1677 &next_config_rom_bus, GFP_KERNEL);
1678 if (next_config_rom == NULL)
1679 return -ENOMEM;
1680
1681 spin_lock_irqsave(&ohci->lock, flags);
1682
1683 if (ohci->next_config_rom == NULL) {
1684 ohci->next_config_rom = next_config_rom;
1685 ohci->next_config_rom_bus = next_config_rom_bus;
1686
Stefan Richter8e859732009-10-08 00:41:59 +02001687 copy_config_rom(ohci->next_config_rom, config_rom, length);
Kristian Høgsberged568912006-12-19 19:58:35 -05001688
1689 ohci->next_header = config_rom[0];
1690 ohci->next_config_rom[0] = 0;
1691
1692 reg_write(ohci, OHCI1394_ConfigROMmap,
1693 ohci->next_config_rom_bus);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001694 ret = 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05001695 }
1696
1697 spin_unlock_irqrestore(&ohci->lock, flags);
1698
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001699 /*
1700 * Now initiate a bus reset to have the changes take
Kristian Høgsberged568912006-12-19 19:58:35 -05001701 * effect. We clean up the old config rom memory and DMA
1702 * mappings in the bus reset tasklet, since the OHCI
1703 * controller could need to access it before the bus reset
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001704 * takes effect.
1705 */
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001706 if (ret == 0)
Kristian Høgsberged568912006-12-19 19:58:35 -05001707 fw_core_initiate_bus_reset(&ohci->card, 1);
Stefan Richter4eaff7d2007-07-25 19:18:08 +02001708 else
1709 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
1710 next_config_rom, next_config_rom_bus);
Kristian Høgsberged568912006-12-19 19:58:35 -05001711
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001712 return ret;
Kristian Høgsberged568912006-12-19 19:58:35 -05001713}
1714
1715static void ohci_send_request(struct fw_card *card, struct fw_packet *packet)
1716{
1717 struct fw_ohci *ohci = fw_ohci(card);
1718
1719 at_context_transmit(&ohci->at_request_ctx, packet);
1720}
1721
1722static void ohci_send_response(struct fw_card *card, struct fw_packet *packet)
1723{
1724 struct fw_ohci *ohci = fw_ohci(card);
1725
1726 at_context_transmit(&ohci->at_response_ctx, packet);
1727}
1728
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001729static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet)
1730{
1731 struct fw_ohci *ohci = fw_ohci(card);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001732 struct context *ctx = &ohci->at_request_ctx;
1733 struct driver_data *driver_data = packet->driver_data;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001734 int ret = -ENOENT;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001735
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001736 tasklet_disable(&ctx->tasklet);
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001737
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001738 if (packet->ack != 0)
1739 goto out;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001740
Stefan Richter19593ff2009-10-14 20:40:10 +02001741 if (packet->payload_mapped)
Stefan Richter1d1dc5e2008-12-10 00:20:38 +01001742 dma_unmap_single(ohci->card.device, packet->payload_bus,
1743 packet->payload_length, DMA_TO_DEVICE);
1744
Stefan Richterad3c0fe2008-03-20 22:04:36 +01001745 log_ar_at_event('T', packet->speed, packet->header, 0x20);
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001746 driver_data->packet = NULL;
1747 packet->ack = RCODE_CANCELLED;
1748 packet->callback(packet, &ohci->card, packet->ack);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001749 ret = 0;
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05001750 out:
1751 tasklet_enable(&ctx->tasklet);
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001752
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001753 return ret;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05001754}
1755
Stefan Richter53dca512008-12-14 21:47:04 +01001756static int ohci_enable_phys_dma(struct fw_card *card,
1757 int node_id, int generation)
Kristian Høgsberged568912006-12-19 19:58:35 -05001758{
Stefan Richter080de8c2008-02-28 20:54:43 +01001759#ifdef CONFIG_FIREWIRE_OHCI_REMOTE_DMA
1760 return 0;
1761#else
Kristian Høgsberged568912006-12-19 19:58:35 -05001762 struct fw_ohci *ohci = fw_ohci(card);
1763 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001764 int n, ret = 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05001765
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001766 /*
1767 * FIXME: Make sure this bitmask is cleared when we clear the busReset
1768 * interrupt bit. Clear physReqResourceAllBuses on bus reset.
1769 */
Kristian Høgsberged568912006-12-19 19:58:35 -05001770
1771 spin_lock_irqsave(&ohci->lock, flags);
1772
1773 if (ohci->generation != generation) {
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001774 ret = -ESTALE;
Kristian Høgsberged568912006-12-19 19:58:35 -05001775 goto out;
1776 }
1777
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001778 /*
1779 * Note, if the node ID contains a non-local bus ID, physical DMA is
1780 * enabled for _all_ nodes on remote buses.
1781 */
Stefan Richter907293d2007-01-23 21:11:43 +01001782
1783 n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63;
1784 if (n < 32)
1785 reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << n);
1786 else
1787 reg_write(ohci, OHCI1394_PhyReqFilterHiSet, 1 << (n - 32));
1788
Kristian Høgsberged568912006-12-19 19:58:35 -05001789 flush_writes(ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -05001790 out:
Stefan Richter6cad95f2007-01-21 20:46:45 +01001791 spin_unlock_irqrestore(&ohci->lock, flags);
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001792
1793 return ret;
Stefan Richter080de8c2008-02-28 20:54:43 +01001794#endif /* CONFIG_FIREWIRE_OHCI_REMOTE_DMA */
Kristian Høgsberged568912006-12-19 19:58:35 -05001795}
Stefan Richter373b2ed2007-03-04 14:45:18 +01001796
Stefan Richter53dca512008-12-14 21:47:04 +01001797static u64 ohci_get_bus_time(struct fw_card *card)
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05001798{
1799 struct fw_ohci *ohci = fw_ohci(card);
1800 u32 cycle_time;
1801 u64 bus_time;
1802
1803 cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
Stefan Richter3dcdc502009-06-04 21:08:43 +02001804 bus_time = ((u64)atomic_read(&ohci->bus_seconds) << 32) | cycle_time;
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05001805
1806 return bus_time;
1807}
1808
David Moore1aa292b2008-07-22 23:23:40 -07001809static void copy_iso_headers(struct iso_context *ctx, void *p)
1810{
1811 int i = ctx->header_length;
1812
1813 if (i + ctx->base.header_size > PAGE_SIZE)
1814 return;
1815
1816 /*
1817 * The iso header is byteswapped to little endian by
1818 * the controller, but the remaining header quadlets
1819 * are big endian. We want to present all the headers
1820 * as big endian, so we have to swap the first quadlet.
1821 */
1822 if (ctx->base.header_size > 0)
1823 *(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
1824 if (ctx->base.header_size > 4)
1825 *(u32 *) (ctx->header + i + 4) = __swab32(*(u32 *) p);
1826 if (ctx->base.header_size > 8)
1827 memcpy(ctx->header + i + 8, p + 8, ctx->base.header_size - 8);
1828 ctx->header_length += ctx->base.header_size;
1829}
1830
Kristian Høgsbergd2746dc2007-02-16 17:34:46 -05001831static int handle_ir_dualbuffer_packet(struct context *context,
1832 struct descriptor *d,
1833 struct descriptor *last)
Kristian Høgsberged568912006-12-19 19:58:35 -05001834{
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001835 struct iso_context *ctx =
1836 container_of(context, struct iso_context, context);
1837 struct db_descriptor *db = (struct db_descriptor *) d;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001838 __le32 *ir_header;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001839 size_t header_length;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001840 void *p, *end;
Kristian Høgsbergd2746dc2007-02-16 17:34:46 -05001841
Stefan Richterefbf3902008-02-23 12:24:57 +01001842 if (db->first_res_count != 0 && db->second_res_count != 0) {
David Moore0642b652007-12-19 03:09:18 -05001843 if (ctx->excess_bytes <= le16_to_cpu(db->second_req_count)) {
1844 /* This descriptor isn't done yet, stop iteration. */
1845 return 0;
1846 }
1847 ctx->excess_bytes -= le16_to_cpu(db->second_req_count);
1848 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001849
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001850 header_length = le16_to_cpu(db->first_req_count) -
1851 le16_to_cpu(db->first_res_count);
1852
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001853 p = db + 1;
1854 end = p + header_length;
David Moore1aa292b2008-07-22 23:23:40 -07001855 while (p < end) {
1856 copy_iso_headers(ctx, p);
David Moore0642b652007-12-19 03:09:18 -05001857 ctx->excess_bytes +=
Stefan Richterefbf3902008-02-23 12:24:57 +01001858 (le32_to_cpu(*(__le32 *)(p + 4)) >> 16) & 0xffff;
David Moore1aa292b2008-07-22 23:23:40 -07001859 p += max(ctx->base.header_size, (size_t)8);
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001860 }
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001861
David Moore0642b652007-12-19 03:09:18 -05001862 ctx->excess_bytes -= le16_to_cpu(db->second_req_count) -
1863 le16_to_cpu(db->second_res_count);
1864
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001865 if (le16_to_cpu(db->control) & DESCRIPTOR_IRQ_ALWAYS) {
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04001866 ir_header = (__le32 *) (db + 1);
1867 ctx->base.callback(&ctx->base,
1868 le32_to_cpu(ir_header[0]) & 0xffff,
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001869 ctx->header_length, ctx->header,
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001870 ctx->base.callback_data);
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001871 ctx->header_length = 0;
1872 }
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001873
1874 return 1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001875}
1876
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001877static int handle_ir_packet_per_buffer(struct context *context,
1878 struct descriptor *d,
1879 struct descriptor *last)
1880{
1881 struct iso_context *ctx =
1882 container_of(context, struct iso_context, context);
David Moorebcee8932007-12-19 15:26:38 -05001883 struct descriptor *pd;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001884 __le32 *ir_header;
David Moorebcee8932007-12-19 15:26:38 -05001885 void *p;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001886
David Moorebcee8932007-12-19 15:26:38 -05001887 for (pd = d; pd <= last; pd++) {
1888 if (pd->transfer_status)
1889 break;
1890 }
1891 if (pd > last)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001892 /* Descriptor(s) not done yet, stop iteration */
1893 return 0;
1894
David Moore1aa292b2008-07-22 23:23:40 -07001895 p = last + 1;
1896 copy_iso_headers(ctx, p);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001897
David Moorebcee8932007-12-19 15:26:38 -05001898 if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) {
1899 ir_header = (__le32 *) p;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001900 ctx->base.callback(&ctx->base,
1901 le32_to_cpu(ir_header[0]) & 0xffff,
1902 ctx->header_length, ctx->header,
1903 ctx->base.callback_data);
1904 ctx->header_length = 0;
1905 }
1906
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001907 return 1;
1908}
1909
Kristian Høgsberg30200732007-02-16 17:34:39 -05001910static int handle_it_packet(struct context *context,
1911 struct descriptor *d,
1912 struct descriptor *last)
Kristian Høgsberged568912006-12-19 19:58:35 -05001913{
Kristian Høgsberg30200732007-02-16 17:34:39 -05001914 struct iso_context *ctx =
1915 container_of(context, struct iso_context, context);
Jay Fenlason31769cef2009-11-21 00:05:56 +01001916 int i;
1917 struct descriptor *pd;
Stefan Richter373b2ed2007-03-04 14:45:18 +01001918
Jay Fenlason31769cef2009-11-21 00:05:56 +01001919 for (pd = d; pd <= last; pd++)
1920 if (pd->transfer_status)
1921 break;
1922 if (pd > last)
1923 /* Descriptor(s) not done yet, stop iteration */
Kristian Høgsberg30200732007-02-16 17:34:39 -05001924 return 0;
Kristian Høgsberged568912006-12-19 19:58:35 -05001925
Jay Fenlason31769cef2009-11-21 00:05:56 +01001926 i = ctx->header_length;
1927 if (i + 4 < PAGE_SIZE) {
1928 /* Present this value as big-endian to match the receive code */
1929 *(__be32 *)(ctx->header + i) = cpu_to_be32(
1930 ((u32)le16_to_cpu(pd->transfer_status) << 16) |
1931 le16_to_cpu(pd->res_count));
1932 ctx->header_length += 4;
1933 }
1934 if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) {
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001935 ctx->base.callback(&ctx->base, le16_to_cpu(last->res_count),
Jay Fenlason31769cef2009-11-21 00:05:56 +01001936 ctx->header_length, ctx->header,
1937 ctx->base.callback_data);
1938 ctx->header_length = 0;
1939 }
Kristian Høgsberg30200732007-02-16 17:34:39 -05001940 return 1;
Kristian Høgsberged568912006-12-19 19:58:35 -05001941}
1942
Stefan Richter53dca512008-12-14 21:47:04 +01001943static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
Stefan Richter4817ed22008-12-21 16:39:46 +01001944 int type, int channel, size_t header_size)
Kristian Høgsberged568912006-12-19 19:58:35 -05001945{
1946 struct fw_ohci *ohci = fw_ohci(card);
1947 struct iso_context *ctx, *list;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001948 descriptor_callback_t callback;
Stefan Richter4817ed22008-12-21 16:39:46 +01001949 u64 *channels, dont_care = ~0ULL;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05001950 u32 *mask, regs;
Kristian Høgsberged568912006-12-19 19:58:35 -05001951 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001952 int index, ret = -ENOMEM;
Kristian Høgsberged568912006-12-19 19:58:35 -05001953
1954 if (type == FW_ISO_CONTEXT_TRANSMIT) {
Stefan Richter4817ed22008-12-21 16:39:46 +01001955 channels = &dont_care;
Kristian Høgsberged568912006-12-19 19:58:35 -05001956 mask = &ohci->it_context_mask;
1957 list = ohci->it_context_list;
Kristian Høgsberg30200732007-02-16 17:34:39 -05001958 callback = handle_it_packet;
Kristian Høgsberged568912006-12-19 19:58:35 -05001959 } else {
Stefan Richter4817ed22008-12-21 16:39:46 +01001960 channels = &ohci->ir_context_channels;
Stefan Richter373b2ed2007-03-04 14:45:18 +01001961 mask = &ohci->ir_context_mask;
1962 list = ohci->ir_context_list;
Stefan Richter95984f62008-07-22 18:41:10 +02001963 if (ohci->use_dualbuffer)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05001964 callback = handle_ir_dualbuffer_packet;
1965 else
1966 callback = handle_ir_packet_per_buffer;
Kristian Høgsberged568912006-12-19 19:58:35 -05001967 }
1968
1969 spin_lock_irqsave(&ohci->lock, flags);
Stefan Richter4817ed22008-12-21 16:39:46 +01001970 index = *channels & 1ULL << channel ? ffs(*mask) - 1 : -1;
1971 if (index >= 0) {
1972 *channels &= ~(1ULL << channel);
Kristian Høgsberged568912006-12-19 19:58:35 -05001973 *mask &= ~(1 << index);
Stefan Richter4817ed22008-12-21 16:39:46 +01001974 }
Kristian Høgsberged568912006-12-19 19:58:35 -05001975 spin_unlock_irqrestore(&ohci->lock, flags);
1976
1977 if (index < 0)
1978 return ERR_PTR(-EBUSY);
1979
Stefan Richter373b2ed2007-03-04 14:45:18 +01001980 if (type == FW_ISO_CONTEXT_TRANSMIT)
1981 regs = OHCI1394_IsoXmitContextBase(index);
1982 else
1983 regs = OHCI1394_IsoRcvContextBase(index);
1984
Kristian Høgsberged568912006-12-19 19:58:35 -05001985 ctx = &list[index];
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001986 memset(ctx, 0, sizeof(*ctx));
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001987 ctx->header_length = 0;
1988 ctx->header = (void *) __get_free_page(GFP_KERNEL);
1989 if (ctx->header == NULL)
1990 goto out;
1991
Stefan Richter2dbd7d72008-12-14 21:45:45 +01001992 ret = context_init(&ctx->context, ohci, regs, callback);
1993 if (ret < 0)
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001994 goto out_with_header;
Kristian Høgsberged568912006-12-19 19:58:35 -05001995
1996 return &ctx->base;
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05001997
1998 out_with_header:
1999 free_page((unsigned long)ctx->header);
2000 out:
2001 spin_lock_irqsave(&ohci->lock, flags);
2002 *mask |= 1 << index;
2003 spin_unlock_irqrestore(&ohci->lock, flags);
2004
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002005 return ERR_PTR(ret);
Kristian Høgsberged568912006-12-19 19:58:35 -05002006}
2007
Kristian Høgsbergeb0306e2007-03-14 17:34:54 -04002008static int ohci_start_iso(struct fw_iso_context *base,
2009 s32 cycle, u32 sync, u32 tags)
Kristian Høgsberged568912006-12-19 19:58:35 -05002010{
Stefan Richter373b2ed2007-03-04 14:45:18 +01002011 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsberg30200732007-02-16 17:34:39 -05002012 struct fw_ohci *ohci = ctx->context.ohci;
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04002013 u32 control, match;
Kristian Høgsberged568912006-12-19 19:58:35 -05002014 int index;
2015
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002016 if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
2017 index = ctx - ohci->it_context_list;
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04002018 match = 0;
2019 if (cycle >= 0)
2020 match = IT_CONTEXT_CYCLE_MATCH_ENABLE |
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002021 (cycle & 0x7fff) << 16;
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -05002022
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002023 reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index);
2024 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04002025 context_run(&ctx->context, match);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002026 } else {
2027 index = ctx - ohci->ir_context_list;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002028 control = IR_CONTEXT_ISOCH_HEADER;
Stefan Richter95984f62008-07-22 18:41:10 +02002029 if (ohci->use_dualbuffer)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002030 control |= IR_CONTEXT_DUAL_BUFFER_MODE;
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04002031 match = (tags << 28) | (sync << 8) | ctx->base.channel;
2032 if (cycle >= 0) {
2033 match |= (cycle & 0x07fff) << 12;
2034 control |= IR_CONTEXT_CYCLE_MATCH_ENABLE;
2035 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002036
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002037 reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
2038 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002039 reg_write(ohci, CONTEXT_MATCH(ctx->context.regs), match);
Kristian Høgsberg8a2f7d92007-03-28 14:26:10 -04002040 context_run(&ctx->context, control);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002041 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002042
2043 return 0;
2044}
2045
Kristian Høgsbergb8295662007-02-16 17:34:42 -05002046static int ohci_stop_iso(struct fw_iso_context *base)
2047{
2048 struct fw_ohci *ohci = fw_ohci(base->card);
Stefan Richter373b2ed2007-03-04 14:45:18 +01002049 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05002050 int index;
2051
2052 if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
2053 index = ctx - ohci->it_context_list;
2054 reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
2055 } else {
2056 index = ctx - ohci->ir_context_list;
2057 reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
2058 }
2059 flush_writes(ohci);
2060 context_stop(&ctx->context);
2061
2062 return 0;
2063}
2064
Kristian Høgsberged568912006-12-19 19:58:35 -05002065static void ohci_free_iso_context(struct fw_iso_context *base)
2066{
2067 struct fw_ohci *ohci = fw_ohci(base->card);
Stefan Richter373b2ed2007-03-04 14:45:18 +01002068 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsberged568912006-12-19 19:58:35 -05002069 unsigned long flags;
2070 int index;
2071
Kristian Høgsbergb8295662007-02-16 17:34:42 -05002072 ohci_stop_iso(base);
2073 context_release(&ctx->context);
Kristian Høgsberg9b32d5f2007-02-16 17:34:44 -05002074 free_page((unsigned long)ctx->header);
Kristian Høgsbergb8295662007-02-16 17:34:42 -05002075
Kristian Høgsberged568912006-12-19 19:58:35 -05002076 spin_lock_irqsave(&ohci->lock, flags);
2077
2078 if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
2079 index = ctx - ohci->it_context_list;
Kristian Høgsberged568912006-12-19 19:58:35 -05002080 ohci->it_context_mask |= 1 << index;
2081 } else {
2082 index = ctx - ohci->ir_context_list;
Kristian Høgsberged568912006-12-19 19:58:35 -05002083 ohci->ir_context_mask |= 1 << index;
Stefan Richter4817ed22008-12-21 16:39:46 +01002084 ohci->ir_context_channels |= 1ULL << base->channel;
Kristian Høgsberged568912006-12-19 19:58:35 -05002085 }
Kristian Høgsberged568912006-12-19 19:58:35 -05002086
2087 spin_unlock_irqrestore(&ohci->lock, flags);
2088}
2089
Stefan Richter53dca512008-12-14 21:47:04 +01002090static int ohci_queue_iso_transmit(struct fw_iso_context *base,
2091 struct fw_iso_packet *packet,
2092 struct fw_iso_buffer *buffer,
2093 unsigned long payload)
Kristian Høgsberged568912006-12-19 19:58:35 -05002094{
Stefan Richter373b2ed2007-03-04 14:45:18 +01002095 struct iso_context *ctx = container_of(base, struct iso_context, base);
Kristian Høgsberg30200732007-02-16 17:34:39 -05002096 struct descriptor *d, *last, *pd;
Kristian Høgsberged568912006-12-19 19:58:35 -05002097 struct fw_iso_packet *p;
2098 __le32 *header;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05002099 dma_addr_t d_bus, page_bus;
Kristian Høgsberged568912006-12-19 19:58:35 -05002100 u32 z, header_z, payload_z, irq;
2101 u32 payload_index, payload_end_index, next_page_index;
Kristian Høgsberg30200732007-02-16 17:34:39 -05002102 int page, end_page, i, length, offset;
Kristian Høgsberged568912006-12-19 19:58:35 -05002103
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002104 /*
2105 * FIXME: Cycle lost behavior should be configurable: lose
2106 * packet, retransmit or terminate..
2107 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002108
2109 p = packet;
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05002110 payload_index = payload;
Kristian Høgsberged568912006-12-19 19:58:35 -05002111
2112 if (p->skip)
2113 z = 1;
2114 else
2115 z = 2;
2116 if (p->header_length > 0)
2117 z++;
2118
2119 /* Determine the first page the payload isn't contained in. */
2120 end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT;
2121 if (p->payload_length > 0)
2122 payload_z = end_page - (payload_index >> PAGE_SHIFT);
2123 else
2124 payload_z = 0;
2125
2126 z += payload_z;
2127
2128 /* Get header size in number of descriptors. */
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04002129 header_z = DIV_ROUND_UP(p->header_length, sizeof(*d));
Kristian Høgsberged568912006-12-19 19:58:35 -05002130
Kristian Høgsberg30200732007-02-16 17:34:39 -05002131 d = context_get_descriptors(&ctx->context, z + header_z, &d_bus);
2132 if (d == NULL)
2133 return -ENOMEM;
Kristian Høgsberged568912006-12-19 19:58:35 -05002134
2135 if (!p->skip) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002136 d[0].control = cpu_to_le16(DESCRIPTOR_KEY_IMMEDIATE);
Kristian Høgsberged568912006-12-19 19:58:35 -05002137 d[0].req_count = cpu_to_le16(8);
2138
2139 header = (__le32 *) &d[1];
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002140 header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) |
2141 IT_HEADER_TAG(p->tag) |
2142 IT_HEADER_TCODE(TCODE_STREAM_DATA) |
2143 IT_HEADER_CHANNEL(ctx->base.channel) |
2144 IT_HEADER_SPEED(ctx->base.speed));
Kristian Høgsberged568912006-12-19 19:58:35 -05002145 header[1] =
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002146 cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length +
Kristian Høgsberged568912006-12-19 19:58:35 -05002147 p->payload_length));
2148 }
2149
2150 if (p->header_length > 0) {
2151 d[2].req_count = cpu_to_le16(p->header_length);
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04002152 d[2].data_address = cpu_to_le32(d_bus + z * sizeof(*d));
Kristian Høgsberged568912006-12-19 19:58:35 -05002153 memcpy(&d[z], p->header, p->header_length);
2154 }
2155
2156 pd = d + z - payload_z;
2157 payload_end_index = payload_index + p->payload_length;
2158 for (i = 0; i < payload_z; i++) {
2159 page = payload_index >> PAGE_SHIFT;
2160 offset = payload_index & ~PAGE_MASK;
2161 next_page_index = (page + 1) << PAGE_SHIFT;
2162 length =
2163 min(next_page_index, payload_end_index) - payload_index;
2164 pd[i].req_count = cpu_to_le16(length);
Kristian Høgsberg9aad8122007-02-16 17:34:38 -05002165
2166 page_bus = page_private(buffer->pages[page]);
2167 pd[i].data_address = cpu_to_le32(page_bus + offset);
Kristian Høgsberged568912006-12-19 19:58:35 -05002168
2169 payload_index += length;
2170 }
2171
Kristian Høgsberged568912006-12-19 19:58:35 -05002172 if (p->interrupt)
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002173 irq = DESCRIPTOR_IRQ_ALWAYS;
Kristian Høgsberged568912006-12-19 19:58:35 -05002174 else
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002175 irq = DESCRIPTOR_NO_IRQ;
Kristian Høgsberged568912006-12-19 19:58:35 -05002176
Kristian Høgsberg30200732007-02-16 17:34:39 -05002177 last = z == 2 ? d : d + z - 1;
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002178 last->control |= cpu_to_le16(DESCRIPTOR_OUTPUT_LAST |
2179 DESCRIPTOR_STATUS |
2180 DESCRIPTOR_BRANCH_ALWAYS |
Kristian Høgsbergcbb59da2007-02-16 17:34:35 -05002181 irq);
Kristian Høgsberged568912006-12-19 19:58:35 -05002182
Kristian Høgsberg30200732007-02-16 17:34:39 -05002183 context_append(&ctx->context, d, z, header_z);
Kristian Høgsberged568912006-12-19 19:58:35 -05002184
2185 return 0;
2186}
Stefan Richter373b2ed2007-03-04 14:45:18 +01002187
Stefan Richter53dca512008-12-14 21:47:04 +01002188static int ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
2189 struct fw_iso_packet *packet,
2190 struct fw_iso_buffer *buffer,
2191 unsigned long payload)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002192{
2193 struct iso_context *ctx = container_of(base, struct iso_context, base);
2194 struct db_descriptor *db = NULL;
2195 struct descriptor *d;
2196 struct fw_iso_packet *p;
2197 dma_addr_t d_bus, page_bus;
2198 u32 z, header_z, length, rest;
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04002199 int page, offset, packet_count, header_size;
Stefan Richter373b2ed2007-03-04 14:45:18 +01002200
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002201 /*
2202 * FIXME: Cycle lost behavior should be configurable: lose
2203 * packet, retransmit or terminate..
2204 */
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002205
2206 p = packet;
2207 z = 2;
2208
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002209 /*
David Moore1aa292b2008-07-22 23:23:40 -07002210 * The OHCI controller puts the isochronous header and trailer in the
2211 * buffer, so we need at least 8 bytes.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002212 */
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04002213 packet_count = p->header_length / ctx->base.header_size;
David Moore1aa292b2008-07-22 23:23:40 -07002214 header_size = packet_count * max(ctx->base.header_size, (size_t)8);
Kristian Høgsbergc70dc782007-03-14 17:34:53 -04002215
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002216 /* Get header size in number of descriptors. */
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04002217 header_z = DIV_ROUND_UP(header_size, sizeof(*d));
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002218 page = payload >> PAGE_SHIFT;
2219 offset = payload & ~PAGE_MASK;
2220 rest = p->payload_length;
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05002221 /*
2222 * The controllers I've tested have not worked correctly when
2223 * second_req_count is zero. Rather than do something we know won't
2224 * work, return an error
2225 */
2226 if (rest == 0)
2227 return -EINVAL;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002228
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002229 /* FIXME: make packet-per-buffer/dual-buffer a context option */
2230 while (rest > 0) {
2231 d = context_get_descriptors(&ctx->context,
2232 z + header_z, &d_bus);
2233 if (d == NULL)
2234 return -ENOMEM;
2235
2236 db = (struct db_descriptor *) d;
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002237 db->control = cpu_to_le16(DESCRIPTOR_STATUS |
2238 DESCRIPTOR_BRANCH_ALWAYS);
David Moore1aa292b2008-07-22 23:23:40 -07002239 db->first_size =
2240 cpu_to_le16(max(ctx->base.header_size, (size_t)8));
David Moore0642b652007-12-19 03:09:18 -05002241 if (p->skip && rest == p->payload_length) {
2242 db->control |= cpu_to_le16(DESCRIPTOR_WAIT);
2243 db->first_req_count = db->first_size;
2244 } else {
2245 db->first_req_count = cpu_to_le16(header_size);
2246 }
Kristian Høgsberg1e1d1962007-02-16 17:34:45 -05002247 db->first_res_count = db->first_req_count;
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04002248 db->first_buffer = cpu_to_le32(d_bus + sizeof(*db));
Stefan Richter373b2ed2007-03-04 14:45:18 +01002249
David Moore0642b652007-12-19 03:09:18 -05002250 if (p->skip && rest == p->payload_length)
2251 length = 4;
2252 else if (offset + rest < PAGE_SIZE)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002253 length = rest;
2254 else
2255 length = PAGE_SIZE - offset;
2256
Kristian Høgsberg1e1d1962007-02-16 17:34:45 -05002257 db->second_req_count = cpu_to_le16(length);
2258 db->second_res_count = db->second_req_count;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002259 page_bus = page_private(buffer->pages[page]);
2260 db->second_buffer = cpu_to_le32(page_bus + offset);
2261
Kristian Høgsbergcb2d2cd2007-02-16 17:34:47 -05002262 if (p->interrupt && length == rest)
Kristian Høgsberga77754a2007-05-07 20:33:35 -04002263 db->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
Kristian Høgsbergcb2d2cd2007-02-16 17:34:47 -05002264
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002265 context_append(&ctx->context, d, z, header_z);
2266 offset = (offset + length) & ~PAGE_MASK;
2267 rest -= length;
David Moore0642b652007-12-19 03:09:18 -05002268 if (offset == 0)
2269 page++;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002270 }
2271
Kristian Høgsbergd2746dc2007-02-16 17:34:46 -05002272 return 0;
2273}
Kristian Høgsberg21efb3c2007-02-16 17:34:50 -05002274
Stefan Richter53dca512008-12-14 21:47:04 +01002275static int ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base,
2276 struct fw_iso_packet *packet,
2277 struct fw_iso_buffer *buffer,
2278 unsigned long payload)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002279{
2280 struct iso_context *ctx = container_of(base, struct iso_context, base);
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05002281 struct descriptor *d, *pd;
David Moorebcee8932007-12-19 15:26:38 -05002282 struct fw_iso_packet *p = packet;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002283 dma_addr_t d_bus, page_bus;
2284 u32 z, header_z, rest;
David Moorebcee8932007-12-19 15:26:38 -05002285 int i, j, length;
2286 int page, offset, packet_count, header_size, payload_per_buffer;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002287
2288 /*
David Moore1aa292b2008-07-22 23:23:40 -07002289 * The OHCI controller puts the isochronous header and trailer in the
2290 * buffer, so we need at least 8 bytes.
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002291 */
2292 packet_count = p->header_length / ctx->base.header_size;
David Moore1aa292b2008-07-22 23:23:40 -07002293 header_size = max(ctx->base.header_size, (size_t)8);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002294
2295 /* Get header size in number of descriptors. */
2296 header_z = DIV_ROUND_UP(header_size, sizeof(*d));
2297 page = payload >> PAGE_SHIFT;
2298 offset = payload & ~PAGE_MASK;
David Moorebcee8932007-12-19 15:26:38 -05002299 payload_per_buffer = p->payload_length / packet_count;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002300
2301 for (i = 0; i < packet_count; i++) {
2302 /* d points to the header descriptor */
David Moorebcee8932007-12-19 15:26:38 -05002303 z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002304 d = context_get_descriptors(&ctx->context,
David Moorebcee8932007-12-19 15:26:38 -05002305 z + header_z, &d_bus);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002306 if (d == NULL)
2307 return -ENOMEM;
2308
David Moorebcee8932007-12-19 15:26:38 -05002309 d->control = cpu_to_le16(DESCRIPTOR_STATUS |
2310 DESCRIPTOR_INPUT_MORE);
2311 if (p->skip && i == 0)
2312 d->control |= cpu_to_le16(DESCRIPTOR_WAIT);
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002313 d->req_count = cpu_to_le16(header_size);
2314 d->res_count = d->req_count;
David Moorebcee8932007-12-19 15:26:38 -05002315 d->transfer_status = 0;
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002316 d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d)));
2317
David Moorebcee8932007-12-19 15:26:38 -05002318 rest = payload_per_buffer;
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05002319 pd = d;
David Moorebcee8932007-12-19 15:26:38 -05002320 for (j = 1; j < z; j++) {
Jay Fenlason8c0c0cc2009-12-11 14:23:58 -05002321 pd++;
David Moorebcee8932007-12-19 15:26:38 -05002322 pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
2323 DESCRIPTOR_INPUT_MORE);
2324
2325 if (offset + rest < PAGE_SIZE)
2326 length = rest;
2327 else
2328 length = PAGE_SIZE - offset;
2329 pd->req_count = cpu_to_le16(length);
2330 pd->res_count = pd->req_count;
2331 pd->transfer_status = 0;
2332
2333 page_bus = page_private(buffer->pages[page]);
2334 pd->data_address = cpu_to_le32(page_bus + offset);
2335
2336 offset = (offset + length) & ~PAGE_MASK;
2337 rest -= length;
2338 if (offset == 0)
2339 page++;
2340 }
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002341 pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
2342 DESCRIPTOR_INPUT_LAST |
2343 DESCRIPTOR_BRANCH_ALWAYS);
David Moorebcee8932007-12-19 15:26:38 -05002344 if (p->interrupt && i == packet_count - 1)
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002345 pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
2346
Jarod Wilsona186b4a2007-12-03 13:43:12 -05002347 context_append(&ctx->context, d, z, header_z);
2348 }
2349
2350 return 0;
2351}
2352
Stefan Richter53dca512008-12-14 21:47:04 +01002353static int ohci_queue_iso(struct fw_iso_context *base,
2354 struct fw_iso_packet *packet,
2355 struct fw_iso_buffer *buffer,
2356 unsigned long payload)
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002357{
Kristian Høgsberge364cf42007-02-16 17:34:49 -05002358 struct iso_context *ctx = container_of(base, struct iso_context, base);
David Moorefe5ca632008-01-06 17:21:41 -05002359 unsigned long flags;
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002360 int ret;
Kristian Høgsberge364cf42007-02-16 17:34:49 -05002361
David Moorefe5ca632008-01-06 17:21:41 -05002362 spin_lock_irqsave(&ctx->context.ohci->lock, flags);
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002363 if (base->type == FW_ISO_CONTEXT_TRANSMIT)
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002364 ret = ohci_queue_iso_transmit(base, packet, buffer, payload);
Stefan Richter95984f62008-07-22 18:41:10 +02002365 else if (ctx->context.ohci->use_dualbuffer)
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002366 ret = ohci_queue_iso_receive_dualbuffer(base, packet,
2367 buffer, payload);
Kristian Høgsberge364cf42007-02-16 17:34:49 -05002368 else
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002369 ret = ohci_queue_iso_receive_packet_per_buffer(base, packet,
2370 buffer, payload);
David Moorefe5ca632008-01-06 17:21:41 -05002371 spin_unlock_irqrestore(&ctx->context.ohci->lock, flags);
2372
Stefan Richter2dbd7d72008-12-14 21:45:45 +01002373 return ret;
Kristian Høgsberg295e3fe2007-02-16 17:34:40 -05002374}
2375
Stefan Richter21ebcd12007-01-14 15:29:07 +01002376static const struct fw_card_driver ohci_driver = {
Kristian Høgsberged568912006-12-19 19:58:35 -05002377 .enable = ohci_enable,
2378 .update_phy_reg = ohci_update_phy_reg,
2379 .set_config_rom = ohci_set_config_rom,
2380 .send_request = ohci_send_request,
2381 .send_response = ohci_send_response,
Kristian Høgsberg730c32f2007-02-06 14:49:32 -05002382 .cancel_packet = ohci_cancel_packet,
Kristian Høgsberged568912006-12-19 19:58:35 -05002383 .enable_phys_dma = ohci_enable_phys_dma,
Kristian Høgsbergd60d7f12007-03-07 12:12:56 -05002384 .get_bus_time = ohci_get_bus_time,
Kristian Høgsberged568912006-12-19 19:58:35 -05002385
2386 .allocate_iso_context = ohci_allocate_iso_context,
2387 .free_iso_context = ohci_free_iso_context,
2388 .queue_iso = ohci_queue_iso,
Kristian Høgsberg69cdb722007-02-16 17:34:41 -05002389 .start_iso = ohci_start_iso,
Kristian Høgsbergb8295662007-02-16 17:34:42 -05002390 .stop_iso = ohci_stop_iso,
Kristian Høgsberged568912006-12-19 19:58:35 -05002391};
2392
Stefan Richter2ed0f182008-03-01 12:35:29 +01002393#ifdef CONFIG_PPC_PMAC
2394static void ohci_pmac_on(struct pci_dev *dev)
2395{
2396 if (machine_is(powermac)) {
2397 struct device_node *ofn = pci_device_to_OF_node(dev);
2398
2399 if (ofn) {
2400 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
2401 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
2402 }
2403 }
2404}
2405
2406static void ohci_pmac_off(struct pci_dev *dev)
2407{
2408 if (machine_is(powermac)) {
2409 struct device_node *ofn = pci_device_to_OF_node(dev);
2410
2411 if (ofn) {
2412 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
2413 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
2414 }
2415 }
2416}
2417#else
2418#define ohci_pmac_on(dev)
2419#define ohci_pmac_off(dev)
2420#endif /* CONFIG_PPC_PMAC */
2421
Stefan Richterfc383792009-08-28 13:25:15 +02002422#define PCI_VENDOR_ID_AGERE PCI_VENDOR_ID_ATT
2423#define PCI_DEVICE_ID_AGERE_FW643 0x5901
2424
Stefan Richter53dca512008-12-14 21:47:04 +01002425static int __devinit pci_probe(struct pci_dev *dev,
2426 const struct pci_device_id *ent)
Kristian Høgsberged568912006-12-19 19:58:35 -05002427{
2428 struct fw_ohci *ohci;
Stefan Richter95984f62008-07-22 18:41:10 +02002429 u32 bus_options, max_receive, link_speed, version;
Kristian Høgsberged568912006-12-19 19:58:35 -05002430 u64 guid;
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002431 int err;
Kristian Høgsberged568912006-12-19 19:58:35 -05002432 size_t size;
2433
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04002434 ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
Kristian Høgsberged568912006-12-19 19:58:35 -05002435 if (ohci == NULL) {
Stefan Richter7007a072008-10-26 09:50:31 +01002436 err = -ENOMEM;
2437 goto fail;
Kristian Høgsberged568912006-12-19 19:58:35 -05002438 }
2439
2440 fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev);
2441
Stefan Richter130d5492008-03-24 20:55:28 +01002442 ohci_pmac_on(dev);
2443
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002444 err = pci_enable_device(dev);
2445 if (err) {
Stefan Richter7007a072008-10-26 09:50:31 +01002446 fw_error("Failed to enable OHCI hardware\n");
Stefan Richterbd7dee632008-02-24 18:59:55 +01002447 goto fail_free;
Kristian Høgsberged568912006-12-19 19:58:35 -05002448 }
2449
2450 pci_set_master(dev);
2451 pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
2452 pci_set_drvdata(dev, ohci);
2453
2454 spin_lock_init(&ohci->lock);
2455
2456 tasklet_init(&ohci->bus_reset_tasklet,
2457 bus_reset_tasklet, (unsigned long)ohci);
2458
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002459 err = pci_request_region(dev, 0, ohci_driver_name);
2460 if (err) {
Kristian Høgsberged568912006-12-19 19:58:35 -05002461 fw_error("MMIO resource unavailable\n");
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002462 goto fail_disable;
Kristian Høgsberged568912006-12-19 19:58:35 -05002463 }
2464
2465 ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE);
2466 if (ohci->registers == NULL) {
2467 fw_error("Failed to remap registers\n");
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002468 err = -ENXIO;
2469 goto fail_iomem;
Kristian Høgsberged568912006-12-19 19:58:35 -05002470 }
2471
Stefan Richter95984f62008-07-22 18:41:10 +02002472 version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
2473 ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
2474
Stefan Richterfc383792009-08-28 13:25:15 +02002475 /* dual-buffer mode is broken if more than one IR context is active */
2476 if (dev->vendor == PCI_VENDOR_ID_AGERE &&
2477 dev->device == PCI_DEVICE_ID_AGERE_FW643)
2478 ohci->use_dualbuffer = false;
2479
Stefan Richter4fe0bad2009-08-28 13:26:03 +02002480 /* dual-buffer mode is broken */
2481 if (dev->vendor == PCI_VENDOR_ID_RICOH &&
2482 dev->device == PCI_DEVICE_ID_RICOH_R5C832)
2483 ohci->use_dualbuffer = false;
2484
Stefan Richter95984f62008-07-22 18:41:10 +02002485/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
2486#if !defined(CONFIG_X86_32)
2487 /* dual-buffer mode is broken with descriptor addresses above 2G */
2488 if (dev->vendor == PCI_VENDOR_ID_TI &&
2489 dev->device == PCI_DEVICE_ID_TI_TSB43AB22)
2490 ohci->use_dualbuffer = false;
2491#endif
2492
2493#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
2494 ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
2495 dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
2496#endif
2497 ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
2498
Kristian Høgsberged568912006-12-19 19:58:35 -05002499 ar_context_init(&ohci->ar_request_ctx, ohci,
2500 OHCI1394_AsReqRcvContextControlSet);
2501
2502 ar_context_init(&ohci->ar_response_ctx, ohci,
2503 OHCI1394_AsRspRcvContextControlSet);
2504
David Moorefe5ca632008-01-06 17:21:41 -05002505 context_init(&ohci->at_request_ctx, ohci,
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002506 OHCI1394_AsReqTrContextControlSet, handle_at_packet);
Kristian Høgsberged568912006-12-19 19:58:35 -05002507
David Moorefe5ca632008-01-06 17:21:41 -05002508 context_init(&ohci->at_response_ctx, ohci,
Kristian Høgsbergf319b6a2007-03-07 12:12:49 -05002509 OHCI1394_AsRspTrContextControlSet, handle_at_packet);
Kristian Høgsberged568912006-12-19 19:58:35 -05002510
Kristian Høgsberged568912006-12-19 19:58:35 -05002511 reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
2512 ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
2513 reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
2514 size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask);
2515 ohci->it_context_list = kzalloc(size, GFP_KERNEL);
2516
2517 reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
Stefan Richter4817ed22008-12-21 16:39:46 +01002518 ohci->ir_context_channels = ~0ULL;
Kristian Høgsberged568912006-12-19 19:58:35 -05002519 ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
2520 reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
2521 size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask);
2522 ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
2523
2524 if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002525 err = -ENOMEM;
Stefan Richter7007a072008-10-26 09:50:31 +01002526 goto fail_contexts;
Kristian Høgsberged568912006-12-19 19:58:35 -05002527 }
2528
2529 /* self-id dma buffer allocation */
2530 ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device,
2531 SELF_ID_BUF_SIZE,
2532 &ohci->self_id_bus,
2533 GFP_KERNEL);
2534 if (ohci->self_id_cpu == NULL) {
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002535 err = -ENOMEM;
Stefan Richter7007a072008-10-26 09:50:31 +01002536 goto fail_contexts;
Kristian Høgsberged568912006-12-19 19:58:35 -05002537 }
2538
Kristian Høgsberged568912006-12-19 19:58:35 -05002539 bus_options = reg_read(ohci, OHCI1394_BusOptions);
2540 max_receive = (bus_options >> 12) & 0xf;
2541 link_speed = bus_options & 0x7;
2542 guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
2543 reg_read(ohci, OHCI1394_GUIDLo);
2544
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002545 err = fw_card_add(&ohci->card, max_receive, link_speed, guid);
Stefan Richtere1eff7a2009-02-03 17:55:19 +01002546 if (err)
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002547 goto fail_self_id;
Kristian Høgsberged568912006-12-19 19:58:35 -05002548
Kristian Høgsberg500be722007-02-16 17:34:43 -05002549 fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
Kay Sieversa1f64812008-10-30 01:41:56 +01002550 dev_name(&dev->dev), version >> 16, version & 0xff);
Stefan Richtere1eff7a2009-02-03 17:55:19 +01002551
Kristian Høgsberged568912006-12-19 19:58:35 -05002552 return 0;
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002553
2554 fail_self_id:
2555 dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
2556 ohci->self_id_cpu, ohci->self_id_bus);
Stefan Richter7007a072008-10-26 09:50:31 +01002557 fail_contexts:
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002558 kfree(ohci->ir_context_list);
Stefan Richter7007a072008-10-26 09:50:31 +01002559 kfree(ohci->it_context_list);
2560 context_release(&ohci->at_response_ctx);
2561 context_release(&ohci->at_request_ctx);
2562 ar_context_release(&ohci->ar_response_ctx);
2563 ar_context_release(&ohci->ar_request_ctx);
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002564 pci_iounmap(dev, ohci->registers);
2565 fail_iomem:
2566 pci_release_region(dev, 0);
2567 fail_disable:
2568 pci_disable_device(dev);
Stefan Richterbd7dee632008-02-24 18:59:55 +01002569 fail_free:
2570 kfree(&ohci->card);
Stefan Richter130d5492008-03-24 20:55:28 +01002571 ohci_pmac_off(dev);
Stefan Richter7007a072008-10-26 09:50:31 +01002572 fail:
2573 if (err == -ENOMEM)
2574 fw_error("Out of memory\n");
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002575
2576 return err;
Kristian Høgsberged568912006-12-19 19:58:35 -05002577}
2578
2579static void pci_remove(struct pci_dev *dev)
2580{
2581 struct fw_ohci *ohci;
2582
2583 ohci = pci_get_drvdata(dev);
Kristian Høgsberge254a4b2007-03-07 12:12:38 -05002584 reg_write(ohci, OHCI1394_IntMaskClear, ~0);
2585 flush_writes(ohci);
Kristian Høgsberged568912006-12-19 19:58:35 -05002586 fw_core_remove_card(&ohci->card);
2587
Kristian Høgsbergc781c062007-05-07 20:33:32 -04002588 /*
2589 * FIXME: Fail all pending packets here, now that the upper
2590 * layers can't queue any more.
2591 */
Kristian Høgsberged568912006-12-19 19:58:35 -05002592
2593 software_reset(ohci);
2594 free_irq(dev->irq, ohci);
Jay Fenlasona55709b2008-10-22 15:59:42 -04002595
2596 if (ohci->next_config_rom && ohci->next_config_rom != ohci->config_rom)
2597 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2598 ohci->next_config_rom, ohci->next_config_rom_bus);
2599 if (ohci->config_rom)
2600 dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
2601 ohci->config_rom, ohci->config_rom_bus);
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002602 dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
2603 ohci->self_id_cpu, ohci->self_id_bus);
Jay Fenlasona55709b2008-10-22 15:59:42 -04002604 ar_context_release(&ohci->ar_request_ctx);
2605 ar_context_release(&ohci->ar_response_ctx);
2606 context_release(&ohci->at_request_ctx);
2607 context_release(&ohci->at_response_ctx);
Kristian Høgsbergd79406dd12007-05-09 19:23:15 -04002608 kfree(ohci->it_context_list);
2609 kfree(ohci->ir_context_list);
2610 pci_iounmap(dev, ohci->registers);
2611 pci_release_region(dev, 0);
2612 pci_disable_device(dev);
Stefan Richterbd7dee632008-02-24 18:59:55 +01002613 kfree(&ohci->card);
Stefan Richter2ed0f182008-03-01 12:35:29 +01002614 ohci_pmac_off(dev);
Stefan Richterea8d0062008-03-01 02:42:56 +01002615
Kristian Høgsberged568912006-12-19 19:58:35 -05002616 fw_notify("Removed fw-ohci device.\n");
2617}
2618
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002619#ifdef CONFIG_PM
Stefan Richter2ed0f182008-03-01 12:35:29 +01002620static int pci_suspend(struct pci_dev *dev, pm_message_t state)
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002621{
Stefan Richter2ed0f182008-03-01 12:35:29 +01002622 struct fw_ohci *ohci = pci_get_drvdata(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002623 int err;
2624
2625 software_reset(ohci);
Stefan Richter2ed0f182008-03-01 12:35:29 +01002626 free_irq(dev->irq, ohci);
2627 err = pci_save_state(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002628 if (err) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02002629 fw_error("pci_save_state failed\n");
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002630 return err;
2631 }
Stefan Richter2ed0f182008-03-01 12:35:29 +01002632 err = pci_set_power_state(dev, pci_choose_state(dev, state));
Stefan Richter55111422007-09-06 09:50:30 +02002633 if (err)
2634 fw_error("pci_set_power_state failed with %d\n", err);
Stefan Richter2ed0f182008-03-01 12:35:29 +01002635 ohci_pmac_off(dev);
Stefan Richterea8d0062008-03-01 02:42:56 +01002636
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002637 return 0;
2638}
2639
Stefan Richter2ed0f182008-03-01 12:35:29 +01002640static int pci_resume(struct pci_dev *dev)
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002641{
Stefan Richter2ed0f182008-03-01 12:35:29 +01002642 struct fw_ohci *ohci = pci_get_drvdata(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002643 int err;
2644
Stefan Richter2ed0f182008-03-01 12:35:29 +01002645 ohci_pmac_on(dev);
2646 pci_set_power_state(dev, PCI_D0);
2647 pci_restore_state(dev);
2648 err = pci_enable_device(dev);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002649 if (err) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02002650 fw_error("pci_enable_device failed\n");
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002651 return err;
2652 }
2653
Kristian Høgsberg0bd243c2007-06-05 19:27:05 -04002654 return ohci_enable(&ohci->card, NULL, 0);
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002655}
2656#endif
2657
Kristian Høgsberged568912006-12-19 19:58:35 -05002658static struct pci_device_id pci_table[] = {
2659 { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
2660 { }
2661};
2662
2663MODULE_DEVICE_TABLE(pci, pci_table);
2664
2665static struct pci_driver fw_ohci_pci_driver = {
2666 .name = ohci_driver_name,
2667 .id_table = pci_table,
2668 .probe = pci_probe,
2669 .remove = pci_remove,
Kristian Høgsberg2aef4692007-05-30 19:06:35 -04002670#ifdef CONFIG_PM
2671 .resume = pci_resume,
2672 .suspend = pci_suspend,
2673#endif
Kristian Høgsberged568912006-12-19 19:58:35 -05002674};
2675
2676MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
2677MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers");
2678MODULE_LICENSE("GPL");
2679
Olaf Hering1e4c7b02007-05-05 23:17:13 +02002680/* Provide a module alias so root-on-sbp2 initrds don't break. */
2681#ifndef CONFIG_IEEE1394_OHCI1394_MODULE
2682MODULE_ALIAS("ohci1394");
2683#endif
2684
Kristian Høgsberged568912006-12-19 19:58:35 -05002685static int __init fw_ohci_init(void)
2686{
2687 return pci_register_driver(&fw_ohci_pci_driver);
2688}
2689
2690static void __exit fw_ohci_cleanup(void)
2691{
2692 pci_unregister_driver(&fw_ohci_pci_driver);
2693}
2694
2695module_init(fw_ohci_init);
2696module_exit(fw_ohci_cleanup);