firewire: Add driver for OHCI firewire host controllers.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
new file mode 100644
index 0000000..5392a2b1
--- /dev/null
+++ b/drivers/firewire/fw-ohci.c
@@ -0,0 +1,1394 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-ohci.c - Driver for OHCI 1394 boards
+ * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/poll.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+
+#include "fw-transaction.h"
+#include "fw-ohci.h"
+
+#define descriptor_output_more 0
+#define descriptor_output_last (1 << 12)
+#define descriptor_input_more (2 << 12)
+#define descriptor_input_last (3 << 12)
+#define descriptor_status (1 << 11)
+#define descriptor_key_immediate (2 << 8)
+#define descriptor_ping (1 << 7)
+#define descriptor_yy (1 << 6)
+#define descriptor_no_irq (0 << 4)
+#define descriptor_irq_error (1 << 4)
+#define descriptor_irq_always (3 << 4)
+#define descriptor_branch_always (3 << 2)
+
+struct descriptor {
+ __le16 req_count;
+ __le16 control;
+ __le32 data_address;
+ __le32 branch_address;
+ __le16 res_count;
+ __le16 transfer_status;
+} __attribute__((aligned(16)));
+
+struct ar_context {
+ struct fw_ohci *ohci;
+ struct descriptor descriptor;
+ __le32 buffer[512];
+ dma_addr_t descriptor_bus;
+ dma_addr_t buffer_bus;
+
+ u32 command_ptr;
+ u32 control_set;
+ u32 control_clear;
+
+ struct tasklet_struct tasklet;
+};
+
+struct at_context {
+ struct fw_ohci *ohci;
+ dma_addr_t descriptor_bus;
+ dma_addr_t buffer_bus;
+
+ struct list_head list;
+
+ struct {
+ struct descriptor more;
+ __le32 header[4];
+ struct descriptor last;
+ } d;
+
+ u32 command_ptr;
+ u32 control_set;
+ u32 control_clear;
+
+ struct tasklet_struct tasklet;
+};
+
+#define it_header_sy(v) ((v) << 0)
+#define it_header_tcode(v) ((v) << 4)
+#define it_header_channel(v) ((v) << 8)
+#define it_header_tag(v) ((v) << 14)
+#define it_header_speed(v) ((v) << 16)
+#define it_header_data_length(v) ((v) << 16)
+
+struct iso_context {
+ struct fw_iso_context base;
+ struct tasklet_struct tasklet;
+ u32 control_set;
+ u32 control_clear;
+ u32 command_ptr;
+ u32 context_match;
+
+ struct descriptor *buffer;
+ dma_addr_t buffer_bus;
+ struct descriptor *head_descriptor;
+ struct descriptor *tail_descriptor;
+ struct descriptor *tail_descriptor_last;
+ struct descriptor *prev_descriptor;
+};
+
+#define CONFIG_ROM_SIZE 1024
+
+struct fw_ohci {
+ struct fw_card card;
+
+ __iomem char *registers;
+ dma_addr_t self_id_bus;
+ __le32 *self_id_cpu;
+ struct tasklet_struct bus_reset_tasklet;
+ int generation;
+ int request_generation;
+
+ /* Spinlock for accessing fw_ohci data. Never call out of
+ * this driver with this lock held. */
+ spinlock_t lock;
+ u32 self_id_buffer[512];
+
+ /* Config rom buffers */
+ __be32 *config_rom;
+ dma_addr_t config_rom_bus;
+ __be32 *next_config_rom;
+ dma_addr_t next_config_rom_bus;
+ u32 next_header;
+
+ struct ar_context ar_request_ctx;
+ struct ar_context ar_response_ctx;
+ struct at_context at_request_ctx;
+ struct at_context at_response_ctx;
+
+ u32 it_context_mask;
+ struct iso_context *it_context_list;
+ u32 ir_context_mask;
+ struct iso_context *ir_context_list;
+};
+
+extern inline struct fw_ohci *fw_ohci(struct fw_card *card)
+{
+ return container_of(card, struct fw_ohci, card);
+}
+
+#define CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
+
+#define CONTEXT_RUN 0x8000
+#define CONTEXT_WAKE 0x1000
+#define CONTEXT_DEAD 0x0800
+#define CONTEXT_ACTIVE 0x0400
+
+#define OHCI1394_MAX_AT_REQ_RETRIES 0x2
+#define OHCI1394_MAX_AT_RESP_RETRIES 0x2
+#define OHCI1394_MAX_PHYS_RESP_RETRIES 0x8
+
+#define FW_OHCI_MAJOR 240
+#define OHCI1394_REGISTER_SIZE 0x800
+#define OHCI_LOOP_COUNT 500
+#define OHCI1394_PCI_HCI_Control 0x40
+#define SELF_ID_BUF_SIZE 0x800
+
+/* FIXME: Move this to linux/pci_ids.h */
+#define PCI_CLASS_SERIAL_FIREWIRE_OHCI 0x0c0010
+
+static char ohci_driver_name[] = KBUILD_MODNAME;
+
+extern inline void reg_write(const struct fw_ohci *ohci, int offset, u32 data)
+{
+ writel(data, ohci->registers + offset);
+}
+
+extern inline u32 reg_read(const struct fw_ohci *ohci, int offset)
+{
+ return readl(ohci->registers + offset);
+}
+
+extern inline void flush_writes(const struct fw_ohci *ohci)
+{
+ /* Do a dummy read to flush writes. */
+ reg_read(ohci, OHCI1394_Version);
+}
+
+static int
+ohci_update_phy_reg(struct fw_card *card, int addr,
+ int clear_bits, int set_bits)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ u32 val, old;
+
+ reg_write(ohci, OHCI1394_PhyControl, OHCI1394_PhyControl_Read(addr));
+ msleep(2);
+ val = reg_read(ohci, OHCI1394_PhyControl);
+ if ((val & OHCI1394_PhyControl_ReadDone) == 0) {
+ fw_error("failed to set phy reg bits.\n");
+ return -EBUSY;
+ }
+
+ old = OHCI1394_PhyControl_ReadData(val);
+ old = (old & ~clear_bits) | set_bits;
+ reg_write(ohci, OHCI1394_PhyControl,
+ OHCI1394_PhyControl_Write(addr, old));
+
+ return 0;
+}
+
+static void ar_context_run(struct ar_context *ctx)
+{
+ reg_write(ctx->ohci, ctx->command_ptr, ctx->descriptor_bus | 1);
+ reg_write(ctx->ohci, ctx->control_set, CONTEXT_RUN);
+ flush_writes(ctx->ohci);
+}
+
+static void ar_context_tasklet(unsigned long data)
+{
+ struct ar_context *ctx = (struct ar_context *)data;
+ struct fw_ohci *ohci = ctx->ohci;
+ u32 status;
+ int length, speed, ack, timestamp, tcode;
+
+ /* FIXME: What to do about evt_* errors? */
+ length = le16_to_cpu(ctx->descriptor.req_count) -
+ le16_to_cpu(ctx->descriptor.res_count) - 4;
+ status = le32_to_cpu(ctx->buffer[length / 4]);
+ ack = ((status >> 16) & 0x1f) - 16;
+ speed = (status >> 21) & 0x7;
+ timestamp = status & 0xffff;
+
+ ctx->buffer[0] = le32_to_cpu(ctx->buffer[0]);
+ ctx->buffer[1] = le32_to_cpu(ctx->buffer[1]);
+ ctx->buffer[2] = le32_to_cpu(ctx->buffer[2]);
+
+ tcode = (ctx->buffer[0] >> 4) & 0x0f;
+ if (TCODE_IS_BLOCK_PACKET(tcode))
+ ctx->buffer[3] = le32_to_cpu(ctx->buffer[3]);
+
+ /* The OHCI bus reset handler synthesizes a phy packet with
+ * the new generation number when a bus reset happens (see
+ * section 8.4.2.3). This helps us determine when a request
+ * was received and make sure we send the response in the same
+ * generation. We only need this for requests; for responses
+ * we use the unique tlabel for finding the matching
+ * request. */
+
+ if (ack + 16 == 0x09)
+ ohci->request_generation = (ctx->buffer[2] >> 16) & 0xff;
+ else if (ctx == &ohci->ar_request_ctx)
+ fw_core_handle_request(&ohci->card, speed, ack, timestamp,
+ ohci->request_generation,
+ length, ctx->buffer);
+ else
+ fw_core_handle_response(&ohci->card, speed, ack, timestamp,
+ length, ctx->buffer);
+
+ ctx->descriptor.data_address = cpu_to_le32(ctx->buffer_bus);
+ ctx->descriptor.req_count = cpu_to_le16(sizeof ctx->buffer);
+ ctx->descriptor.res_count = cpu_to_le16(sizeof ctx->buffer);
+
+ dma_sync_single_for_device(ohci->card.device, ctx->descriptor_bus,
+ sizeof ctx->descriptor_bus, DMA_TO_DEVICE);
+
+ /* FIXME: We stop and restart the ar context here, what if we
+ * stop while a receive is in progress? Maybe we could just
+ * loop the context back to itself and use it in buffer fill
+ * mode as intended... */
+
+ reg_write(ctx->ohci, ctx->control_clear, CONTEXT_RUN);
+ ar_context_run(ctx);
+}
+
+static int
+ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 control_set)
+{
+ ctx->descriptor_bus =
+ dma_map_single(ohci->card.device, &ctx->descriptor,
+ sizeof ctx->descriptor, DMA_TO_DEVICE);
+ if (ctx->descriptor_bus == 0)
+ return -ENOMEM;
+
+ if (ctx->descriptor_bus & 0xf)
+ fw_notify("descriptor not 16-byte aligned: 0x%08x\n",
+ ctx->descriptor_bus);
+
+ ctx->buffer_bus =
+ dma_map_single(ohci->card.device, ctx->buffer,
+ sizeof ctx->buffer, DMA_FROM_DEVICE);
+
+ if (ctx->buffer_bus == 0) {
+ dma_unmap_single(ohci->card.device, ctx->descriptor_bus,
+ sizeof ctx->descriptor, DMA_TO_DEVICE);
+ return -ENOMEM;
+ }
+
+ memset(&ctx->descriptor, 0, sizeof ctx->descriptor);
+ ctx->descriptor.control = cpu_to_le16(descriptor_input_more |
+ descriptor_status |
+ descriptor_branch_always);
+ ctx->descriptor.req_count = cpu_to_le16(sizeof ctx->buffer);
+ ctx->descriptor.data_address = cpu_to_le32(ctx->buffer_bus);
+ ctx->descriptor.res_count = cpu_to_le16(sizeof ctx->buffer);
+
+ ctx->control_set = control_set;
+ ctx->control_clear = control_set + 4;
+ ctx->command_ptr = control_set + 12;
+ ctx->ohci = ohci;
+
+ tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
+
+ ar_context_run(ctx);
+
+ return 0;
+}
+
+static void
+do_packet_callbacks(struct fw_ohci *ohci, struct list_head *list)
+{
+ struct fw_packet *p, *next;
+
+ list_for_each_entry_safe(p, next, list, link)
+ p->callback(p, &ohci->card, p->status);
+}
+
+static void
+complete_transmission(struct fw_packet *packet,
+ int status, struct list_head *list)
+{
+ list_move_tail(&packet->link, list);
+ packet->status = status;
+}
+
+/* This function prepares the first packet in the context queue for
+ * transmission. Must always be called with the ochi->lock held to
+ * ensure proper generation handling and locking around packet queue
+ * manipulation. */
+static void
+at_context_setup_packet(struct at_context *ctx, struct list_head *list)
+{
+ struct fw_packet *packet;
+ struct fw_ohci *ohci = ctx->ohci;
+ int z, tcode;
+
+ packet = fw_packet(ctx->list.next);
+
+ memset(&ctx->d, 0, sizeof ctx->d);
+ if (packet->payload_length > 0) {
+ packet->payload_bus = dma_map_single(ohci->card.device,
+ packet->payload,
+ packet->payload_length,
+ DMA_TO_DEVICE);
+ if (packet->payload_bus == 0) {
+ complete_transmission(packet, -ENOMEM, list);
+ return;
+ }
+
+ ctx->d.more.control =
+ cpu_to_le16(descriptor_output_more |
+ descriptor_key_immediate);
+ ctx->d.more.req_count = cpu_to_le16(packet->header_length);
+ ctx->d.more.res_count = cpu_to_le16(packet->timestamp);
+ ctx->d.last.control =
+ cpu_to_le16(descriptor_output_last |
+ descriptor_irq_always |
+ descriptor_branch_always);
+ ctx->d.last.req_count = cpu_to_le16(packet->payload_length);
+ ctx->d.last.data_address = cpu_to_le32(packet->payload_bus);
+ z = 3;
+ } else {
+ ctx->d.more.control =
+ cpu_to_le16(descriptor_output_last |
+ descriptor_key_immediate |
+ descriptor_irq_always |
+ descriptor_branch_always);
+ ctx->d.more.req_count = cpu_to_le16(packet->header_length);
+ ctx->d.more.res_count = cpu_to_le16(packet->timestamp);
+ z = 2;
+ }
+
+ /* The DMA format for asyncronous link packets is different
+ * from the IEEE1394 layout, so shift the fields around
+ * accordingly. If header_length is 8, it's a PHY packet, to
+ * which we need to prepend an extra quadlet. */
+ if (packet->header_length > 8) {
+ ctx->d.header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
+ (packet->speed << 16));
+ ctx->d.header[1] = cpu_to_le32((packet->header[1] & 0xffff) |
+ (packet->header[0] & 0xffff0000));
+ ctx->d.header[2] = cpu_to_le32(packet->header[2]);
+
+ tcode = (packet->header[0] >> 4) & 0x0f;
+ if (TCODE_IS_BLOCK_PACKET(tcode))
+ ctx->d.header[3] = cpu_to_le32(packet->header[3]);
+ else
+ ctx->d.header[3] = packet->header[3];
+ } else {
+ ctx->d.header[0] =
+ cpu_to_le32((OHCI1394_phy_tcode << 4) |
+ (packet->speed << 16));
+ ctx->d.header[1] = cpu_to_le32(packet->header[0]);
+ ctx->d.header[2] = cpu_to_le32(packet->header[1]);
+ ctx->d.more.req_count = cpu_to_le16(12);
+ }
+
+ /* FIXME: Document how the locking works. */
+ if (ohci->generation == packet->generation) {
+ reg_write(ctx->ohci, ctx->command_ptr,
+ ctx->descriptor_bus | z);
+ reg_write(ctx->ohci, ctx->control_set,
+ CONTEXT_RUN | CONTEXT_WAKE);
+ } else {
+ /* We dont return error codes from this function; all
+ * transmission errors are reported through the
+ * callback. */
+ complete_transmission(packet, -ESTALE, list);
+ }
+}
+
+static void at_context_stop(struct at_context *ctx)
+{
+ u32 reg;
+
+ reg_write(ctx->ohci, ctx->control_clear, CONTEXT_RUN);
+
+ reg = reg_read(ctx->ohci, ctx->control_set);
+ if (reg & CONTEXT_ACTIVE)
+ fw_notify("Tried to stop context, but it is still active "
+ "(0x%08x).\n", reg);
+}
+
+static void at_context_tasklet(unsigned long data)
+{
+ struct at_context *ctx = (struct at_context *)data;
+ struct fw_ohci *ohci = ctx->ohci;
+ struct fw_packet *packet;
+ LIST_HEAD(list);
+ unsigned long flags;
+ int evt;
+
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ packet = fw_packet(ctx->list.next);
+
+ at_context_stop(ctx);
+
+ if (packet->payload_length > 0) {
+ dma_unmap_single(ohci->card.device, packet->payload_bus,
+ packet->payload_length, DMA_TO_DEVICE);
+ evt = le16_to_cpu(ctx->d.last.transfer_status) & 0x1f;
+ packet->timestamp = le16_to_cpu(ctx->d.last.res_count);
+ }
+ else {
+ evt = le16_to_cpu(ctx->d.more.transfer_status) & 0x1f;
+ packet->timestamp = le16_to_cpu(ctx->d.more.res_count);
+ }
+
+ if (evt < 16) {
+ switch (evt) {
+ case OHCI1394_evt_timeout:
+ /* Async response transmit timed out. */
+ complete_transmission(packet, -ETIMEDOUT, &list);
+ break;
+
+ case OHCI1394_evt_flushed:
+ /* The packet was flushed should give same
+ * error as when we try to use a stale
+ * generation count. */
+ complete_transmission(packet, -ESTALE, &list);
+ break;
+
+ case OHCI1394_evt_missing_ack:
+ /* This would be a higher level software
+ * error, it is using a valid (current)
+ * generation count, but the node is not on
+ * the bus. */
+ complete_transmission(packet, -ENODEV, &list);
+ break;
+
+ default:
+ complete_transmission(packet, -EIO, &list);
+ break;
+ }
+ } else
+ complete_transmission(packet, evt - 16, &list);
+
+ /* If more packets are queued, set up the next one. */
+ if (!list_empty(&ctx->list))
+ at_context_setup_packet(ctx, &list);
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ do_packet_callbacks(ohci, &list);
+}
+
+static int
+at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 control_set)
+{
+ INIT_LIST_HEAD(&ctx->list);
+
+ ctx->descriptor_bus =
+ dma_map_single(ohci->card.device, &ctx->d,
+ sizeof ctx->d, DMA_TO_DEVICE);
+ if (ctx->descriptor_bus == 0)
+ return -ENOMEM;
+
+ ctx->control_set = control_set;
+ ctx->control_clear = control_set + 4;
+ ctx->command_ptr = control_set + 12;
+ ctx->ohci = ohci;
+
+ tasklet_init(&ctx->tasklet, at_context_tasklet, (unsigned long)ctx);
+
+ return 0;
+}
+
+static void
+at_context_transmit(struct at_context *ctx, struct fw_packet *packet)
+{
+ LIST_HEAD(list);
+ unsigned long flags;
+ int was_empty;
+
+ spin_lock_irqsave(&ctx->ohci->lock, flags);
+
+ was_empty = list_empty(&ctx->list);
+ list_add_tail(&packet->link, &ctx->list);
+ if (was_empty)
+ at_context_setup_packet(ctx, &list);
+
+ spin_unlock_irqrestore(&ctx->ohci->lock, flags);
+
+ do_packet_callbacks(ctx->ohci, &list);
+}
+
+static void bus_reset_tasklet(unsigned long data)
+{
+ struct fw_ohci *ohci = (struct fw_ohci *)data;
+ int self_id_count, i, j, reg, node_id;
+ int generation, new_generation;
+ unsigned long flags;
+
+ reg = reg_read(ohci, OHCI1394_NodeID);
+ if (!(reg & OHCI1394_NodeID_idValid)) {
+ fw_error("node ID not valid, new bus reset in progress\n");
+ return;
+ }
+ node_id = reg & 0xffff;
+
+ /* The count in the SelfIDCount register is the number of
+ * bytes in the self ID receive buffer. Since we also receive
+ * the inverted quadlets and a header quadlet, we shift one
+ * bit extra to get the actual number of self IDs. */
+
+ self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff;
+ generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
+
+ for (i = 1, j = 0; j < self_id_count; i += 2, j++) {
+ if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1])
+ fw_error("inconsistent self IDs\n");
+ ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]);
+ }
+
+ /* Check the consistency of the self IDs we just read. The
+ * problem we face is that a new bus reset can start while we
+ * read out the self IDs from the DMA buffer. If this happens,
+ * the DMA buffer will be overwritten with new self IDs and we
+ * will read out inconsistent data. The OHCI specification
+ * (section 11.2) recommends a technique similar to
+ * linux/seqlock.h, where we remember the generation of the
+ * self IDs in the buffer before reading them out and compare
+ * it to the current generation after reading them out. If
+ * the two generations match we know we have a consistent set
+ * of self IDs. */
+
+ new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff;
+ if (new_generation != generation) {
+ fw_notify("recursive bus reset detected, "
+ "discarding self ids\n");
+ return;
+ }
+
+ /* FIXME: Document how the locking works. */
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ ohci->generation = generation;
+ at_context_stop(&ohci->at_request_ctx);
+ at_context_stop(&ohci->at_response_ctx);
+ reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
+
+ /* This next bit is unrelated to the AT context stuff but we
+ * have to do it under the spinlock also. If a new config rom
+ * was set up before this reset, the old one is now no longer
+ * in use and we can free it. Update the config rom pointers
+ * to point to the current config rom and clear the
+ * next_config_rom pointer so a new udpate can take place. */
+
+ if (ohci->next_config_rom != NULL) {
+ dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+ ohci->config_rom, ohci->config_rom_bus);
+ ohci->config_rom = ohci->next_config_rom;
+ ohci->config_rom_bus = ohci->next_config_rom_bus;
+ ohci->next_config_rom = NULL;
+
+ /* Restore config_rom image and manually update
+ * config_rom registers. Writing the header quadlet
+ * will indicate that the config rom is ready, so we
+ * do that last. */
+ reg_write(ohci, OHCI1394_BusOptions,
+ be32_to_cpu(ohci->config_rom[2]));
+ ohci->config_rom[0] = cpu_to_be32(ohci->next_header);
+ reg_write(ohci, OHCI1394_ConfigROMhdr, ohci->next_header);
+ }
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ fw_core_handle_bus_reset(&ohci->card, node_id, generation,
+ self_id_count, ohci->self_id_buffer);
+}
+
+static irqreturn_t irq_handler(int irq, void *data)
+{
+ struct fw_ohci *ohci = data;
+ u32 event, iso_event;
+ int i;
+
+ event = reg_read(ohci, OHCI1394_IntEventClear);
+
+ if (!event)
+ return IRQ_NONE;
+
+ reg_write(ohci, OHCI1394_IntEventClear, event);
+
+ if (event & OHCI1394_selfIDComplete)
+ tasklet_schedule(&ohci->bus_reset_tasklet);
+
+ if (event & OHCI1394_RQPkt)
+ tasklet_schedule(&ohci->ar_request_ctx.tasklet);
+
+ if (event & OHCI1394_RSPkt)
+ tasklet_schedule(&ohci->ar_response_ctx.tasklet);
+
+ if (event & OHCI1394_reqTxComplete)
+ tasklet_schedule(&ohci->at_request_ctx.tasklet);
+
+ if (event & OHCI1394_respTxComplete)
+ tasklet_schedule(&ohci->at_response_ctx.tasklet);
+
+ iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventSet);
+ reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
+
+ while (iso_event) {
+ i = ffs(iso_event) - 1;
+ tasklet_schedule(&ohci->ir_context_list[i].tasklet);
+ iso_event &= ~(1 << i);
+ }
+
+ iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventSet);
+ reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
+
+ while (iso_event) {
+ i = ffs(iso_event) - 1;
+ tasklet_schedule(&ohci->it_context_list[i].tasklet);
+ iso_event &= ~(1 << i);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ struct pci_dev *dev = to_pci_dev(card->device);
+
+ /* When the link is not yet enabled, the atomic config rom
+ * update mechanism described below in ohci_set_config_rom()
+ * is not active. We have to update ConfigRomHeader and
+ * BusOptions manually, and the write to ConfigROMmap takes
+ * effect immediately. We tie this to the enabling of the
+ * link, so we have a valid config rom before enabling - the
+ * OHCI requires that ConfigROMhdr and BusOptions have valid
+ * values before enabling.
+ *
+ * However, when the ConfigROMmap is written, some controllers
+ * always read back quadlets 0 and 2 from the config rom to
+ * the ConfigRomHeader and BusOptions registers on bus reset.
+ * They shouldn't do that in this initial case where the link
+ * isn't enabled. This means we have to use the same
+ * workaround here, setting the bus header to 0 and then write
+ * the right values in the bus reset tasklet.
+ */
+
+ ohci->next_config_rom =
+ dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+ &ohci->next_config_rom_bus, GFP_KERNEL);
+ if (ohci->next_config_rom == NULL)
+ return -ENOMEM;
+
+ memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE);
+ fw_memcpy_to_be32(ohci->next_config_rom, config_rom, length * 4);
+
+ ohci->next_header = config_rom[0];
+ ohci->next_config_rom[0] = 0;
+ reg_write(ohci, OHCI1394_ConfigROMhdr, 0);
+ reg_write(ohci, OHCI1394_BusOptions, config_rom[2]);
+ reg_write(ohci, OHCI1394_ConfigROMmap, ohci->next_config_rom_bus);
+
+ reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000);
+
+ if (request_irq(dev->irq, irq_handler,
+ SA_SHIRQ, ohci_driver_name, ohci)) {
+ fw_error("Failed to allocate shared interrupt %d.\n",
+ dev->irq);
+ dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+ ohci->config_rom, ohci->config_rom_bus);
+ return -EIO;
+ }
+
+ reg_write(ohci, OHCI1394_HCControlSet,
+ OHCI1394_HCControl_linkEnable |
+ OHCI1394_HCControl_BIBimageValid);
+ flush_writes(ohci);
+
+ /* We are ready to go, initiate bus reset to finish the
+ * initialization. */
+
+ fw_core_initiate_bus_reset(&ohci->card, 1);
+
+ return 0;
+}
+
+static int
+ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length)
+{
+ struct fw_ohci *ohci;
+ unsigned long flags;
+ int retval = 0;
+ __be32 *next_config_rom;
+ dma_addr_t next_config_rom_bus;
+
+ ohci = fw_ohci(card);
+
+ /* When the OHCI controller is enabled, the config rom update
+ * mechanism is a bit tricky, but easy enough to use. See
+ * section 5.5.6 in the OHCI specification.
+ *
+ * The OHCI controller caches the new config rom address in a
+ * shadow register (ConfigROMmapNext) and needs a bus reset
+ * for the changes to take place. When the bus reset is
+ * detected, the controller loads the new values for the
+ * ConfigRomHeader and BusOptions registers from the specified
+ * config rom and loads ConfigROMmap from the ConfigROMmapNext
+ * shadow register. All automatically and atomically.
+ *
+ * Now, there's a twist to this story. The automatic load of
+ * ConfigRomHeader and BusOptions doesn't honor the
+ * noByteSwapData bit, so with a be32 config rom, the
+ * controller will load be32 values in to these registers
+ * during the atomic update, even on litte endian
+ * architectures. The workaround we use is to put a 0 in the
+ * header quadlet; 0 is endian agnostic and means that the
+ * config rom isn't ready yet. In the bus reset tasklet we
+ * then set up the real values for the two registers.
+ *
+ * We use ohci->lock to avoid racing with the code that sets
+ * ohci->next_config_rom to NULL (see bus_reset_tasklet).
+ */
+
+ next_config_rom =
+ dma_alloc_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+ &next_config_rom_bus, GFP_KERNEL);
+ if (next_config_rom == NULL)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ if (ohci->next_config_rom == NULL) {
+ ohci->next_config_rom = next_config_rom;
+ ohci->next_config_rom_bus = next_config_rom_bus;
+
+ memset(ohci->next_config_rom, 0, CONFIG_ROM_SIZE);
+ fw_memcpy_to_be32(ohci->next_config_rom, config_rom,
+ length * 4);
+
+ ohci->next_header = config_rom[0];
+ ohci->next_config_rom[0] = 0;
+
+ reg_write(ohci, OHCI1394_ConfigROMmap,
+ ohci->next_config_rom_bus);
+ } else {
+ dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
+ next_config_rom, next_config_rom_bus);
+ retval = -EBUSY;
+ }
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ /* Now initiate a bus reset to have the changes take
+ * effect. We clean up the old config rom memory and DMA
+ * mappings in the bus reset tasklet, since the OHCI
+ * controller could need to access it before the bus reset
+ * takes effect. */
+ if (retval == 0)
+ fw_core_initiate_bus_reset(&ohci->card, 1);
+
+ return retval;
+}
+
+static void ohci_send_request(struct fw_card *card, struct fw_packet *packet)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+
+ at_context_transmit(&ohci->at_request_ctx, packet);
+}
+
+static void ohci_send_response(struct fw_card *card, struct fw_packet *packet)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+
+ at_context_transmit(&ohci->at_response_ctx, packet);
+}
+
+static int
+ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ unsigned long flags;
+ int retval = 0;
+
+ /* FIXME: make sure this bitmask is cleared when we clear the
+ * busReset interrupt bit. */
+
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ if (ohci->generation != generation) {
+ retval = -ESTALE;
+ goto out;
+ }
+
+ if (node_id < 32) {
+ reg_write(ohci, OHCI1394_PhyReqFilterLoSet, 1 << node_id);
+ } else {
+ reg_write(ohci, OHCI1394_PhyReqFilterHiSet,
+ 1 << (node_id - 32));
+ }
+ flush_writes(ohci);
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ out:
+ return retval;
+}
+
+static void ir_context_tasklet(unsigned long data)
+{
+ struct iso_context *ctx = (struct iso_context *)data;
+
+ (void)ctx;
+}
+
+#define ISO_BUFFER_SIZE (64 * 1024)
+
+static void flush_iso_context(struct iso_context *ctx)
+{
+ struct fw_ohci *ohci = fw_ohci(ctx->base.card);
+ struct descriptor *d, *last;
+ u32 address;
+ int z;
+
+ dma_sync_single_for_cpu(ohci->card.device, ctx->buffer_bus,
+ ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+
+ d = ctx->tail_descriptor;
+ last = ctx->tail_descriptor_last;
+
+ while (last->branch_address != 0 && last->transfer_status != 0) {
+ address = le32_to_cpu(last->branch_address);
+ z = address & 0xf;
+ d = ctx->buffer + (address - ctx->buffer_bus) / sizeof *d;
+
+ if (z == 2)
+ last = d;
+ else
+ last = d + z - 1;
+
+ if (le16_to_cpu(last->control) & descriptor_irq_always)
+ ctx->base.callback(&ctx->base,
+ 0, le16_to_cpu(last->res_count),
+ ctx->base.callback_data);
+ }
+
+ ctx->tail_descriptor = d;
+ ctx->tail_descriptor_last = last;
+}
+
+static void it_context_tasklet(unsigned long data)
+{
+ struct iso_context *ctx = (struct iso_context *)data;
+
+ flush_iso_context(ctx);
+}
+
+static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
+ int type)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ struct iso_context *ctx, *list;
+ void (*tasklet) (unsigned long data);
+ u32 *mask;
+ unsigned long flags;
+ int index;
+
+ if (type == FW_ISO_CONTEXT_TRANSMIT) {
+ mask = &ohci->it_context_mask;
+ list = ohci->it_context_list;
+ tasklet = it_context_tasklet;
+ } else {
+ mask = &ohci->ir_context_mask;
+ list = ohci->ir_context_list;
+ tasklet = ir_context_tasklet;
+ }
+
+ spin_lock_irqsave(&ohci->lock, flags);
+ index = ffs(*mask) - 1;
+ if (index >= 0)
+ *mask &= ~(1 << index);
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ if (index < 0)
+ return ERR_PTR(-EBUSY);
+
+ ctx = &list[index];
+ memset(ctx, 0, sizeof *ctx);
+ tasklet_init(&ctx->tasklet, tasklet, (unsigned long)ctx);
+
+ ctx->buffer = kmalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
+ if (ctx->buffer == NULL) {
+ spin_lock_irqsave(&ohci->lock, flags);
+ *mask |= 1 << index;
+ spin_unlock_irqrestore(&ohci->lock, flags);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ctx->buffer_bus =
+ dma_map_single(card->device, ctx->buffer,
+ ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+
+ ctx->head_descriptor = ctx->buffer;
+ ctx->prev_descriptor = ctx->buffer;
+ ctx->tail_descriptor = ctx->buffer;
+ ctx->tail_descriptor_last = ctx->buffer;
+
+ /* We put a dummy descriptor in the buffer that has a NULL
+ * branch address and looks like it's been sent. That way we
+ * have a descriptor to append DMA programs to. Also, the
+ * ring buffer invariant is that it always has at least one
+ * element so that head == tail means buffer full. */
+
+ memset(ctx->head_descriptor, 0, sizeof *ctx->head_descriptor);
+ ctx->head_descriptor->control =
+ cpu_to_le16(descriptor_output_last);
+ ctx->head_descriptor->transfer_status = cpu_to_le16(0x8011);
+ ctx->head_descriptor++;
+
+ return &ctx->base;
+}
+
+static int ohci_send_iso(struct fw_iso_context *base, s32 cycle)
+{
+ struct iso_context *ctx = (struct iso_context *)base;
+ struct fw_ohci *ohci = fw_ohci(ctx->base.card);
+ u32 cycle_match = 0;
+ int index;
+
+ index = ctx - ohci->it_context_list;
+ if (cycle > 0)
+ cycle_match = CONTEXT_CYCLE_MATCH_ENABLE |
+ (cycle & 0x7fff) << 16;
+
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
+ reg_write(ohci, OHCI1394_IsoXmitCommandPtr(index),
+ le32_to_cpu(ctx->tail_descriptor_last->branch_address));
+ reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0);
+ reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index),
+ CONTEXT_RUN | cycle_match);
+ flush_writes(ohci);
+
+ return 0;
+}
+
+static void ohci_free_iso_context(struct fw_iso_context *base)
+{
+ struct fw_ohci *ohci = fw_ohci(base->card);
+ struct iso_context *ctx = (struct iso_context *)base;
+ unsigned long flags;
+ int index;
+
+ flush_iso_context(ctx);
+
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
+ index = ctx - ohci->it_context_list;
+ reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0);
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
+ ohci->it_context_mask |= 1 << index;
+ } else {
+ index = ctx - ohci->ir_context_list;
+ reg_write(ohci, OHCI1394_IsoRcvContextControlClear(index), ~0);
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
+ ohci->ir_context_mask |= 1 << index;
+ }
+ flush_writes(ohci);
+
+ dma_unmap_single(ohci->card.device, ctx->buffer_bus,
+ ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+}
+
+static int
+ohci_queue_iso(struct fw_iso_context *base,
+ struct fw_iso_packet *packet, void *payload)
+{
+ struct iso_context *ctx = (struct iso_context *)base;
+ struct fw_ohci *ohci = fw_ohci(ctx->base.card);
+ struct descriptor *d, *end, *last, *tail, *pd;
+ struct fw_iso_packet *p;
+ __le32 *header;
+ dma_addr_t d_bus;
+ u32 z, header_z, payload_z, irq;
+ u32 payload_index, payload_end_index, next_page_index;
+ int index, page, end_page, i, length, offset;
+
+ /* FIXME: Cycle lost behavior should be configurable: lose
+ * packet, retransmit or terminate.. */
+
+ p = packet;
+ payload_index = payload - ctx->base.buffer;
+ d = ctx->head_descriptor;
+ tail = ctx->tail_descriptor;
+ end = ctx->buffer + ISO_BUFFER_SIZE / sizeof(struct descriptor);
+
+ if (p->skip)
+ z = 1;
+ else
+ z = 2;
+ if (p->header_length > 0)
+ z++;
+
+ /* Determine the first page the payload isn't contained in. */
+ end_page = PAGE_ALIGN(payload_index + p->payload_length) >> PAGE_SHIFT;
+ if (p->payload_length > 0)
+ payload_z = end_page - (payload_index >> PAGE_SHIFT);
+ else
+ payload_z = 0;
+
+ z += payload_z;
+
+ /* Get header size in number of descriptors. */
+ header_z = DIV_ROUND_UP(p->header_length, sizeof *d);
+
+ if (d + z + header_z <= tail) {
+ goto has_space;
+ } else if (d > tail && d + z + header_z <= end) {
+ goto has_space;
+ } else if (d > tail && ctx->buffer + z + header_z <= tail) {
+ d = ctx->buffer;
+ goto has_space;
+ }
+
+ /* No space in buffer */
+ return -1;
+
+ has_space:
+ memset(d, 0, (z + header_z) * sizeof *d);
+ d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof *d;
+
+ if (!p->skip) {
+ d[0].control = cpu_to_le16(descriptor_key_immediate);
+ d[0].req_count = cpu_to_le16(8);
+
+ header = (__le32 *) &d[1];
+ header[0] = cpu_to_le32(it_header_sy(p->sy) |
+ it_header_tag(p->tag) |
+ it_header_tcode(TCODE_STREAM_DATA) |
+ it_header_channel(ctx->base.channel) |
+ it_header_speed(ctx->base.speed));
+ header[1] =
+ cpu_to_le32(it_header_data_length(p->header_length +
+ p->payload_length));
+ }
+
+ if (p->header_length > 0) {
+ d[2].req_count = cpu_to_le16(p->header_length);
+ d[2].data_address = cpu_to_le32(d_bus + z * sizeof *d);
+ memcpy(&d[z], p->header, p->header_length);
+ }
+
+ pd = d + z - payload_z;
+ payload_end_index = payload_index + p->payload_length;
+ for (i = 0; i < payload_z; i++) {
+ page = payload_index >> PAGE_SHIFT;
+ offset = payload_index & ~PAGE_MASK;
+ next_page_index = (page + 1) << PAGE_SHIFT;
+ length =
+ min(next_page_index, payload_end_index) - payload_index;
+ pd[i].req_count = cpu_to_le16(length);
+ pd[i].data_address = cpu_to_le32(ctx->base.pages[page] + offset);
+
+ payload_index += length;
+ }
+
+ if (z == 2)
+ last = d;
+ else
+ last = d + z - 1;
+
+ if (p->interrupt)
+ irq = descriptor_irq_always;
+ else
+ irq = descriptor_no_irq;
+
+ last->control = cpu_to_le16(descriptor_output_last |
+ descriptor_status |
+ descriptor_branch_always |
+ irq);
+
+ dma_sync_single_for_device(ohci->card.device, ctx->buffer_bus,
+ ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+
+ ctx->head_descriptor = d + z + header_z;
+ ctx->prev_descriptor->branch_address = cpu_to_le32(d_bus | z);
+ ctx->prev_descriptor = last;
+
+ index = ctx - ohci->it_context_list;
+ reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index), CONTEXT_WAKE);
+ flush_writes(ohci);
+
+ return 0;
+}
+
+static struct fw_card_driver ohci_driver = {
+ .name = ohci_driver_name,
+ .enable = ohci_enable,
+ .update_phy_reg = ohci_update_phy_reg,
+ .set_config_rom = ohci_set_config_rom,
+ .send_request = ohci_send_request,
+ .send_response = ohci_send_response,
+ .enable_phys_dma = ohci_enable_phys_dma,
+
+ .allocate_iso_context = ohci_allocate_iso_context,
+ .free_iso_context = ohci_free_iso_context,
+ .queue_iso = ohci_queue_iso,
+ .send_iso = ohci_send_iso
+};
+
+static int software_reset(struct fw_ohci *ohci)
+{
+ int i;
+
+ reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
+
+ for (i = 0; i < OHCI_LOOP_COUNT; i++) {
+ if ((reg_read(ohci, OHCI1394_HCControlSet) &
+ OHCI1394_HCControl_softReset) == 0)
+ return 0;
+ msleep(1);
+ }
+
+ return -EBUSY;
+}
+
+/* ---------- pci subsystem interface ---------- */
+
+enum {
+ CLEANUP_SELF_ID,
+ CLEANUP_REGISTERS,
+ CLEANUP_IOMEM,
+ CLEANUP_DISABLE,
+ CLEANUP_PUT_CARD,
+};
+
+static int cleanup(struct fw_ohci *ohci, int stage, int code)
+{
+ struct pci_dev *dev = to_pci_dev(ohci->card.device);
+
+ switch (stage) {
+ case CLEANUP_SELF_ID:
+ dma_free_coherent(ohci->card.device, SELF_ID_BUF_SIZE,
+ ohci->self_id_cpu, ohci->self_id_bus);
+ case CLEANUP_REGISTERS:
+ kfree(ohci->it_context_list);
+ kfree(ohci->ir_context_list);
+ pci_iounmap(dev, ohci->registers);
+ case CLEANUP_IOMEM:
+ pci_release_region(dev, 0);
+ case CLEANUP_DISABLE:
+ pci_disable_device(dev);
+ case CLEANUP_PUT_CARD:
+ fw_card_put(&ohci->card);
+ }
+
+ return code;
+}
+
+static int __devinit
+pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
+{
+ struct fw_ohci *ohci;
+ u32 bus_options, max_receive, link_speed;
+ u64 guid;
+ int error_code;
+ size_t size;
+
+ ohci = kzalloc(sizeof *ohci, GFP_KERNEL);
+ if (ohci == NULL) {
+ fw_error("Could not malloc fw_ohci data.\n");
+ return -ENOMEM;
+ }
+
+ fw_card_initialize(&ohci->card, &ohci_driver, &dev->dev);
+
+ if (pci_enable_device(dev)) {
+ fw_error("Failed to enable OHCI hardware.\n");
+ return cleanup(ohci, CLEANUP_PUT_CARD, -ENODEV);
+ }
+
+ pci_set_master(dev);
+ pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
+ pci_set_drvdata(dev, ohci);
+
+ spin_lock_init(&ohci->lock);
+
+ tasklet_init(&ohci->bus_reset_tasklet,
+ bus_reset_tasklet, (unsigned long)ohci);
+
+ if (pci_request_region(dev, 0, ohci_driver_name)) {
+ fw_error("MMIO resource unavailable\n");
+ return cleanup(ohci, CLEANUP_DISABLE, -EBUSY);
+ }
+
+ ohci->registers = pci_iomap(dev, 0, OHCI1394_REGISTER_SIZE);
+ if (ohci->registers == NULL) {
+ fw_error("Failed to remap registers\n");
+ return cleanup(ohci, CLEANUP_IOMEM, -ENXIO);
+ }
+
+ if (software_reset(ohci)) {
+ fw_error("Failed to reset ohci card.\n");
+ return cleanup(ohci, CLEANUP_REGISTERS, -EBUSY);
+ }
+
+ /* Now enable LPS, which we need in order to start accessing
+ * most of the registers. In fact, on some cards (ALI M5251),
+ * accessing registers in the SClk domain without LPS enabled
+ * will lock up the machine. Wait 50msec to make sure we have
+ * full link enabled. */
+ reg_write(ohci, OHCI1394_HCControlSet,
+ OHCI1394_HCControl_LPS |
+ OHCI1394_HCControl_postedWriteEnable);
+ flush_writes(ohci);
+ msleep(50);
+
+ reg_write(ohci, OHCI1394_HCControlClear,
+ OHCI1394_HCControl_noByteSwapData);
+
+ reg_write(ohci, OHCI1394_LinkControlSet,
+ OHCI1394_LinkControl_rcvSelfID |
+ OHCI1394_LinkControl_cycleTimerEnable |
+ OHCI1394_LinkControl_cycleMaster);
+
+ ar_context_init(&ohci->ar_request_ctx, ohci,
+ OHCI1394_AsReqRcvContextControlSet);
+
+ ar_context_init(&ohci->ar_response_ctx, ohci,
+ OHCI1394_AsRspRcvContextControlSet);
+
+ at_context_init(&ohci->at_request_ctx, ohci,
+ OHCI1394_AsReqTrContextControlSet);
+
+ at_context_init(&ohci->at_response_ctx, ohci,
+ OHCI1394_AsRspTrContextControlSet);
+
+ reg_write(ohci, OHCI1394_ATRetries,
+ OHCI1394_MAX_AT_REQ_RETRIES |
+ (OHCI1394_MAX_AT_RESP_RETRIES << 4) |
+ (OHCI1394_MAX_PHYS_RESP_RETRIES << 8));
+
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, ~0);
+ ohci->it_context_mask = reg_read(ohci, OHCI1394_IsoRecvIntMaskSet);
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, ~0);
+ size = sizeof(struct iso_context) * hweight32(ohci->it_context_mask);
+ ohci->it_context_list = kzalloc(size, GFP_KERNEL);
+
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, ~0);
+ ohci->ir_context_mask = reg_read(ohci, OHCI1394_IsoXmitIntMaskSet);
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, ~0);
+ size = sizeof(struct iso_context) * hweight32(ohci->ir_context_mask);
+ ohci->ir_context_list = kzalloc(size, GFP_KERNEL);
+
+ if (ohci->it_context_list == NULL || ohci->ir_context_list == NULL) {
+ fw_error("Out of memory for it/ir contexts.\n");
+ return cleanup(ohci, CLEANUP_REGISTERS, -ENOMEM);
+ }
+
+ /* self-id dma buffer allocation */
+ ohci->self_id_cpu = dma_alloc_coherent(ohci->card.device,
+ SELF_ID_BUF_SIZE,
+ &ohci->self_id_bus,
+ GFP_KERNEL);
+ if (ohci->self_id_cpu == NULL) {
+ fw_error("Out of memory for self ID buffer.\n");
+ return cleanup(ohci, CLEANUP_REGISTERS, -ENOMEM);
+ }
+
+ reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
+ reg_write(ohci, OHCI1394_PhyUpperBound, 0x00010000);
+ reg_write(ohci, OHCI1394_IntEventClear, ~0);
+ reg_write(ohci, OHCI1394_IntMaskClear, ~0);
+ reg_write(ohci, OHCI1394_IntMaskSet,
+ OHCI1394_selfIDComplete |
+ OHCI1394_RQPkt | OHCI1394_RSPkt |
+ OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
+ OHCI1394_isochRx | OHCI1394_isochTx |
+ OHCI1394_masterIntEnable);
+
+ bus_options = reg_read(ohci, OHCI1394_BusOptions);
+ max_receive = (bus_options >> 12) & 0xf;
+ link_speed = bus_options & 0x7;
+ guid = ((u64) reg_read(ohci, OHCI1394_GUIDHi) << 32) |
+ reg_read(ohci, OHCI1394_GUIDLo);
+
+ error_code = fw_card_add(&ohci->card, max_receive, link_speed, guid);
+ if (error_code < 0)
+ return cleanup(ohci, CLEANUP_SELF_ID, error_code);
+
+ fw_notify("Added fw-ohci device %s.\n", dev->dev.bus_id);
+
+ return 0;
+}
+
+static void pci_remove(struct pci_dev *dev)
+{
+ struct fw_ohci *ohci;
+
+ ohci = pci_get_drvdata(dev);
+ reg_write(ohci, OHCI1394_IntMaskClear, OHCI1394_masterIntEnable);
+ fw_core_remove_card(&ohci->card);
+
+ /* FIXME: Fail all pending packets here, now that the upper
+ * layers can't queue any more. */
+
+ software_reset(ohci);
+ free_irq(dev->irq, ohci);
+ cleanup(ohci, CLEANUP_SELF_ID, 0);
+
+ fw_notify("Removed fw-ohci device.\n");
+}
+
+static struct pci_device_id pci_table[] = {
+ { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_FIREWIRE_OHCI, ~0) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(pci, pci_table);
+
+static struct pci_driver fw_ohci_pci_driver = {
+ .name = ohci_driver_name,
+ .id_table = pci_table,
+ .probe = pci_probe,
+ .remove = pci_remove,
+};
+
+MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
+MODULE_DESCRIPTION("Driver for PCI OHCI IEEE1394 controllers");
+MODULE_LICENSE("GPL");
+
+static int __init fw_ohci_init(void)
+{
+ return pci_register_driver(&fw_ohci_pci_driver);
+}
+
+static void __exit fw_ohci_cleanup(void)
+{
+ pci_unregister_driver(&fw_ohci_pci_driver);
+}
+
+module_init(fw_ohci_init);
+module_exit(fw_ohci_cleanup);
