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Greg Kroah-Hartmane3b3d0f2017-11-06 18:11:51 +01001// SPDX-License-Identifier: GPL-2.0+
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*****************************************************************************/
3/*
4 * moxa.c -- MOXA Intellio family multiport serial driver.
5 *
Jiri Slabyb9705b602008-04-30 00:53:48 -07006 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
7 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 */
12
13/*
14 * MOXA Intellio Series Driver
15 * for : LINUX
16 * date : 1999/1/7
17 * version : 5.1
18 */
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/mm.h>
23#include <linux/ioport.h>
24#include <linux/errno.h>
Jiri Slaby03718232008-04-30 00:53:39 -070025#include <linux/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/signal.h>
27#include <linux/sched.h>
28#include <linux/timer.h>
29#include <linux/interrupt.h>
30#include <linux/tty.h>
31#include <linux/tty_flip.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/fcntl.h>
35#include <linux/ptrace.h>
36#include <linux/serial.h>
37#include <linux/tty_driver.h>
38#include <linux/delay.h>
39#include <linux/pci.h>
40#include <linux/init.h>
41#include <linux/bitops.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090042#include <linux/slab.h>
Manuel Zerpies5a3c6b2512011-06-16 14:07:22 +020043#include <linux/ratelimit.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/io.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080046#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Jiri Slabyb55c8aa2021-09-14 11:08:23 +020048#define MOXA 0x400
49#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
50#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
51#define MOXA_GETDATACOUNT (MOXA + 23)
52#define MOXA_GET_IOQUEUE (MOXA + 27)
53#define MOXA_FLUSH_QUEUE (MOXA + 28)
54#define MOXA_GETMSTATUS (MOXA + 65)
55
56/*
57 * System Configuration
58 */
59
60#define Magic_code 0x404
61
62/*
63 * for C218 BIOS initialization
64 */
65#define C218_ConfBase 0x800
66#define C218_status (C218_ConfBase + 0) /* BIOS running status */
67#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
68#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
69#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
70#define C218check_sum (C218_ConfBase + 8) /* BYTE */
71#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
72#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
73#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
74#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
75#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
76
77#define C218_LoadBuf 0x0F00
78#define C218_KeyCode 0x218
79#define CP204J_KeyCode 0x204
80
81/*
82 * for C320 BIOS initialization
83 */
84#define C320_ConfBase 0x800
85#define C320_LoadBuf 0x0f00
86#define STS_init 0x05 /* for C320_status */
87
88#define C320_status C320_ConfBase + 0 /* BIOS running status */
89#define C320_diag C320_ConfBase + 2 /* diagnostic status */
90#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
91#define C320DLoad_len C320_ConfBase + 6 /* WORD */
92#define C320check_sum C320_ConfBase + 8 /* WORD */
93#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
94#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
95#define C320UART_no C320_ConfBase + 0x0e /* WORD */
96
97#define C320_KeyCode 0x320
98
99#define FixPage_addr 0x0000 /* starting addr of static page */
100#define DynPage_addr 0x2000 /* starting addr of dynamic page */
101#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
102#define Control_reg 0x1ff0 /* select page and reset control */
103#define HW_reset 0x80
104
105/*
106 * Function Codes
107 */
108#define FC_CardReset 0x80
109#define FC_ChannelReset 1 /* C320 firmware not supported */
110#define FC_EnableCH 2
111#define FC_DisableCH 3
112#define FC_SetParam 4
113#define FC_SetMode 5
114#define FC_SetRate 6
115#define FC_LineControl 7
116#define FC_LineStatus 8
117#define FC_XmitControl 9
118#define FC_FlushQueue 10
119#define FC_SendBreak 11
120#define FC_StopBreak 12
121#define FC_LoopbackON 13
122#define FC_LoopbackOFF 14
123#define FC_ClrIrqTable 15
124#define FC_SendXon 16
125#define FC_SetTermIrq 17 /* C320 firmware not supported */
126#define FC_SetCntIrq 18 /* C320 firmware not supported */
127#define FC_SetBreakIrq 19
128#define FC_SetLineIrq 20
129#define FC_SetFlowCtl 21
130#define FC_GenIrq 22
131#define FC_InCD180 23
132#define FC_OutCD180 24
133#define FC_InUARTreg 23
134#define FC_OutUARTreg 24
135#define FC_SetXonXoff 25
136#define FC_OutCD180CCR 26
137#define FC_ExtIQueue 27
138#define FC_ExtOQueue 28
139#define FC_ClrLineIrq 29
140#define FC_HWFlowCtl 30
141#define FC_GetClockRate 35
142#define FC_SetBaud 36
143#define FC_SetDataMode 41
144#define FC_GetCCSR 43
145#define FC_GetDataError 45
146#define FC_RxControl 50
147#define FC_ImmSend 51
148#define FC_SetXonState 52
149#define FC_SetXoffState 53
150#define FC_SetRxFIFOTrig 54
151#define FC_SetTxFIFOCnt 55
152#define FC_UnixRate 56
153#define FC_UnixResetTimer 57
154
155#define RxFIFOTrig1 0
156#define RxFIFOTrig4 1
157#define RxFIFOTrig8 2
158#define RxFIFOTrig14 3
159
160/*
161 * Dual-Ported RAM
162 */
163#define DRAM_global 0
164#define INT_data (DRAM_global + 0)
165#define Config_base (DRAM_global + 0x108)
166
167#define IRQindex (INT_data + 0)
168#define IRQpending (INT_data + 4)
169#define IRQtable (INT_data + 8)
170
171/*
172 * Interrupt Status
173 */
174#define IntrRx 0x01 /* receiver data O.K. */
175#define IntrTx 0x02 /* transmit buffer empty */
176#define IntrFunc 0x04 /* function complete */
177#define IntrBreak 0x08 /* received break */
178#define IntrLine 0x10 /* line status change
179 for transmitter */
180#define IntrIntr 0x20 /* received INTR code */
181#define IntrQuit 0x40 /* received QUIT code */
182#define IntrEOF 0x80 /* received EOF code */
183
184#define IntrRxTrigger 0x100 /* rx data count reach trigger value */
185#define IntrTxTrigger 0x200 /* tx data count below trigger value */
186
187#define Magic_no (Config_base + 0)
188#define Card_model_no (Config_base + 2)
189#define Total_ports (Config_base + 4)
190#define Module_cnt (Config_base + 8)
191#define Module_no (Config_base + 10)
192#define Timer_10ms (Config_base + 14)
193#define Disable_IRQ (Config_base + 20)
194#define TMS320_PORT1 (Config_base + 22)
195#define TMS320_PORT2 (Config_base + 24)
196#define TMS320_CLOCK (Config_base + 26)
197
198/*
199 * DATA BUFFER in DRAM
200 */
201#define Extern_table 0x400 /* Base address of the external table
202 (24 words * 64) total 3K bytes
203 (24 words * 128) total 6K bytes */
204#define Extern_size 0x60 /* 96 bytes */
205#define RXrptr 0x00 /* read pointer for RX buffer */
206#define RXwptr 0x02 /* write pointer for RX buffer */
207#define TXrptr 0x04 /* read pointer for TX buffer */
208#define TXwptr 0x06 /* write pointer for TX buffer */
209#define HostStat 0x08 /* IRQ flag and general flag */
210#define FlagStat 0x0A
211#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
212 /* x x x x | | | | */
213 /* | | | + CTS flow */
214 /* | | +--- RTS flow */
215 /* | +------ TX Xon/Xoff */
216 /* +--------- RX Xon/Xoff */
217#define Break_cnt 0x0E /* received break count */
218#define CD180TXirq 0x10 /* if non-0: enable TX irq */
219#define RX_mask 0x12
220#define TX_mask 0x14
221#define Ofs_rxb 0x16
222#define Ofs_txb 0x18
223#define Page_rxb 0x1A
224#define Page_txb 0x1C
225#define EndPage_rxb 0x1E
226#define EndPage_txb 0x20
227#define Data_error 0x22
228#define RxTrigger 0x28
229#define TxTrigger 0x2a
230
231#define rRXwptr 0x34
232#define Low_water 0x36
233
234#define FuncCode 0x40
235#define FuncArg 0x42
236#define FuncArg1 0x44
237
238#define C218rx_size 0x2000 /* 8K bytes */
239#define C218tx_size 0x8000 /* 32K bytes */
240
241#define C218rx_mask (C218rx_size - 1)
242#define C218tx_mask (C218tx_size - 1)
243
244#define C320p8rx_size 0x2000
245#define C320p8tx_size 0x8000
246#define C320p8rx_mask (C320p8rx_size - 1)
247#define C320p8tx_mask (C320p8tx_size - 1)
248
249#define C320p16rx_size 0x2000
250#define C320p16tx_size 0x4000
251#define C320p16rx_mask (C320p16rx_size - 1)
252#define C320p16tx_mask (C320p16tx_size - 1)
253
254#define C320p24rx_size 0x2000
255#define C320p24tx_size 0x2000
256#define C320p24rx_mask (C320p24rx_size - 1)
257#define C320p24tx_mask (C320p24tx_size - 1)
258
259#define C320p32rx_size 0x1000
260#define C320p32tx_size 0x1000
261#define C320p32rx_mask (C320p32rx_size - 1)
262#define C320p32tx_mask (C320p32tx_size - 1)
263
264#define Page_size 0x2000U
265#define Page_mask (Page_size - 1)
266#define C218rx_spage 3
267#define C218tx_spage 4
268#define C218rx_pageno 1
269#define C218tx_pageno 4
270#define C218buf_pageno 5
271
272#define C320p8rx_spage 3
273#define C320p8tx_spage 4
274#define C320p8rx_pgno 1
275#define C320p8tx_pgno 4
276#define C320p8buf_pgno 5
277
278#define C320p16rx_spage 3
279#define C320p16tx_spage 4
280#define C320p16rx_pgno 1
281#define C320p16tx_pgno 2
282#define C320p16buf_pgno 3
283
284#define C320p24rx_spage 3
285#define C320p24tx_spage 4
286#define C320p24rx_pgno 1
287#define C320p24tx_pgno 1
288#define C320p24buf_pgno 2
289
290#define C320p32rx_spage 3
291#define C320p32tx_ofs C320p32rx_size
292#define C320p32tx_spage 3
293#define C320p32buf_pgno 1
294
295/*
296 * Host Status
297 */
298#define WakeupRx 0x01
299#define WakeupTx 0x02
300#define WakeupBreak 0x08
301#define WakeupLine 0x10
302#define WakeupIntr 0x20
303#define WakeupQuit 0x40
304#define WakeupEOF 0x80 /* used in VTIME control */
305#define WakeupRxTrigger 0x100
306#define WakeupTxTrigger 0x200
307/*
308 * Flag status
309 */
310#define Rx_over 0x01
311#define Xoff_state 0x02
312#define Tx_flowOff 0x04
313#define Tx_enable 0x08
314#define CTS_state 0x10
315#define DSR_state 0x20
316#define DCD_state 0x80
317/*
318 * FlowControl
319 */
320#define CTS_FlowCtl 1
321#define RTS_FlowCtl 2
322#define Tx_FlowCtl 4
323#define Rx_FlowCtl 8
324#define IXM_IXANY 0x10
325
326#define LowWater 128
327
328#define DTR_ON 1
329#define RTS_ON 2
330#define CTS_ON 1
331#define DSR_ON 2
332#define DCD_ON 8
333
334/* mode definition */
335#define MX_CS8 0x03
336#define MX_CS7 0x02
337#define MX_CS6 0x01
338#define MX_CS5 0x00
339
340#define MX_STOP1 0x00
341#define MX_STOP15 0x04
342#define MX_STOP2 0x08
343
344#define MX_PARNONE 0x00
345#define MX_PAREVEN 0x40
346#define MX_PARODD 0xC0
347#define MX_PARMARK 0xA0
348#define MX_PARSPACE 0x20
Jiri Slaby03718232008-04-30 00:53:39 -0700349
Jiri Slabyb9705b602008-04-30 00:53:48 -0700350#define MOXA_VERSION "6.0k"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Jiri Slaby03718232008-04-30 00:53:39 -0700352#define MOXA_FW_HDRLEN 32
353
Jiri Slaby11324ed2007-02-10 01:45:31 -0800354#define MOXAMAJOR 172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Jiri Slaby11324ed2007-02-10 01:45:31 -0800356#define MAX_BOARDS 4 /* Don't change this value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
Jiri Slaby11324ed2007-02-10 01:45:31 -0800358#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Jiri Slaby08d01c72008-04-30 00:53:47 -0700360#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
361 (brd)->boardType == MOXA_BOARD_C320_PCI)
362
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363/*
364 * Define the Moxa PCI vendor and device IDs.
365 */
Jiri Slaby11324ed2007-02-10 01:45:31 -0800366#define MOXA_BUS_TYPE_ISA 0
367#define MOXA_BUS_TYPE_PCI 1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369enum {
370 MOXA_BOARD_C218_PCI = 1,
371 MOXA_BOARD_C218_ISA,
372 MOXA_BOARD_C320_PCI,
373 MOXA_BOARD_C320_ISA,
374 MOXA_BOARD_CP204J,
375};
376
377static char *moxa_brdname[] =
378{
379 "C218 Turbo PCI series",
380 "C218 Turbo ISA series",
381 "C320 Turbo PCI series",
382 "C320 Turbo ISA series",
383 "CP-204J series",
384};
385
386#ifdef CONFIG_PCI
Arvind Yadav50bd8422017-07-23 15:31:05 +0530387static const struct pci_device_id moxa_pcibrds[] = {
Jiri Slaby5ebb4072007-02-10 01:45:30 -0800388 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
389 .driver_data = MOXA_BOARD_C218_PCI },
390 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
391 .driver_data = MOXA_BOARD_C320_PCI },
392 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
393 .driver_data = MOXA_BOARD_CP204J },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 { 0 }
395};
396MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
397#endif /* CONFIG_PCI */
398
Jiri Slaby03718232008-04-30 00:53:39 -0700399struct moxa_port;
400
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800401static struct moxa_board_conf {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 int boardType;
403 int numPorts;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 int busType;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800405
Jiri Slaby810ab092008-04-30 00:53:41 -0700406 unsigned int ready;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800407
Jiri Slaby03718232008-04-30 00:53:39 -0700408 struct moxa_port *ports;
409
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800410 void __iomem *basemem;
411 void __iomem *intNdx;
412 void __iomem *intPend;
413 void __iomem *intTable;
414} moxa_boards[MAX_BOARDS];
415
416struct mxser_mstatus {
417 tcflag_t cflag;
418 int cts;
419 int dsr;
420 int ri;
421 int dcd;
Jiri Slaby9dff89c2007-02-10 01:45:30 -0800422};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800424struct moxaq_str {
425 int inq;
426 int outq;
427};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800429struct moxa_port {
Alan Cox9de6a512008-07-16 21:56:02 +0100430 struct tty_port port;
Jiri Slabyb4173f42008-04-30 00:53:40 -0700431 struct moxa_board_conf *board;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700432 void __iomem *tableAddr;
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 int type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 int cflag;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700436 unsigned long statusflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Alan Cox8482bcd2009-11-30 13:18:13 +0000438 u8 DCDState; /* Protected by the port lock */
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700439 u8 lineCtrl;
440 u8 lowChkFlag;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -0800441};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Jiri Slaby74d7d972008-04-30 00:53:43 -0700443struct mon_str {
444 int tick;
445 int rxcnt[MAX_PORTS];
446 int txcnt[MAX_PORTS];
447};
448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449/* statusflags */
Alan Coxa808ac02009-11-30 13:18:02 +0000450#define TXSTOPPED 1
451#define LOWWAIT 2
452#define EMPTYWAIT 3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455#define WAKEUP_CHARS 256
456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457static int ttymajor = MOXAMAJOR;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700458static struct mon_str moxaLog;
459static unsigned int moxaFuncTout = HZ / 2;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700460static unsigned int moxaLowWaterChk;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700461static DEFINE_MUTEX(moxa_openlock);
Alan Coxe8c62102009-11-30 13:18:24 +0000462static DEFINE_SPINLOCK(moxa_lock);
Rakib Mullickc6fc8262009-12-09 12:34:18 -0800463
Jiri Slabyd353eca2008-04-30 00:53:37 -0700464static unsigned long baseaddr[MAX_BOARDS];
465static unsigned int type[MAX_BOARDS];
466static unsigned int numports[MAX_BOARDS];
Jiri Slaby793be892012-08-07 21:47:55 +0200467static struct tty_port moxa_service_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469MODULE_AUTHOR("William Chen");
470MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
471MODULE_LICENSE("GPL");
Ben Hutchingse6c4ef92010-01-13 23:34:18 +0000472MODULE_FIRMWARE("c218tunx.cod");
473MODULE_FIRMWARE("cp204unx.cod");
474MODULE_FIRMWARE("c320tunx.cod");
Rakib Mullickc6fc8262009-12-09 12:34:18 -0800475
Jiri Slabyd353eca2008-04-30 00:53:37 -0700476module_param_array(type, uint, NULL, 0);
477MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
David Howells3b60daf82017-04-04 16:54:29 +0100478module_param_hw_array(baseaddr, ulong, ioport, NULL, 0);
Jiri Slabyd353eca2008-04-30 00:53:37 -0700479MODULE_PARM_DESC(baseaddr, "base address");
480module_param_array(numports, uint, NULL, 0);
481MODULE_PARM_DESC(numports, "numports (ignored for C218)");
Rakib Mullickc6fc8262009-12-09 12:34:18 -0800482
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483module_param(ttymajor, int, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485/*
486 * static functions:
487 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488static int moxa_open(struct tty_struct *, struct file *);
489static void moxa_close(struct tty_struct *, struct file *);
490static int moxa_write(struct tty_struct *, const unsigned char *, int);
Jiri Slaby03b3b1a2021-05-05 11:19:15 +0200491static unsigned int moxa_write_room(struct tty_struct *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492static void moxa_flush_buffer(struct tty_struct *);
Jiri Slabyfff4ef12021-05-05 11:19:19 +0200493static unsigned int moxa_chars_in_buffer(struct tty_struct *);
Ilpo Järvinena8c11c12022-08-16 14:57:39 +0300494static void moxa_set_termios(struct tty_struct *, const struct ktermios *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495static void moxa_stop(struct tty_struct *);
496static void moxa_start(struct tty_struct *);
497static void moxa_hangup(struct tty_struct *);
Alan Cox60b33c12011-02-14 16:26:14 +0000498static int moxa_tiocmget(struct tty_struct *tty);
Alan Cox20b9d172011-02-14 16:26:50 +0000499static int moxa_tiocmset(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 unsigned int set, unsigned int clear);
Kees Cook24ed9602017-08-28 11:28:21 -0700501static void moxa_poll(struct timer_list *);
Ilpo Järvinena8c11c12022-08-16 14:57:39 +0300502static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *);
Alan Coxf1761782009-11-30 13:17:51 +0000503static void moxa_shutdown(struct tty_port *);
Ilpo Järvinenb300fb22023-01-17 11:03:52 +0200504static bool moxa_carrier_raised(struct tty_port *);
Ilpo Järvinen5d420392023-01-17 11:03:53 +0200505static void moxa_dtr_rts(struct tty_port *, bool);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506/*
507 * moxa board interface functions:
508 */
Jiri Slabyb4173f42008-04-30 00:53:40 -0700509static void MoxaPortEnable(struct moxa_port *);
510static void MoxaPortDisable(struct moxa_port *);
511static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
Ilpo Järvinen5d420392023-01-17 11:03:53 +0200512static int MoxaPortGetLineOut(struct moxa_port *, bool *, bool *);
513static void MoxaPortLineCtrl(struct moxa_port *, bool, bool);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700514static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
515static int MoxaPortLineStatus(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700516static void MoxaPortFlushData(struct moxa_port *, int);
Alan Coxd450b5a2008-10-13 10:39:58 +0100517static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700518static int MoxaPortReadData(struct moxa_port *);
Jiri Slabyfff4ef12021-05-05 11:19:19 +0200519static unsigned int MoxaPortTxQueue(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700520static int MoxaPortRxQueue(struct moxa_port *);
Jiri Slaby03b3b1a2021-05-05 11:19:15 +0200521static unsigned int MoxaPortTxFree(struct moxa_port *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700522static void MoxaPortTxDisable(struct moxa_port *);
523static void MoxaPortTxEnable(struct moxa_port *);
Al Viro1c729ab2018-09-11 22:01:00 -0400524static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *);
525static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *);
Jiri Slabyb4173f42008-04-30 00:53:40 -0700526static void MoxaSetFifo(struct moxa_port *port, int enable);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Jiri Slaby74d7d972008-04-30 00:53:43 -0700528/*
529 * I/O functions
530 */
531
Alan Coxa808ac02009-11-30 13:18:02 +0000532static DEFINE_SPINLOCK(moxafunc_lock);
533
Jiri Slaby74d7d972008-04-30 00:53:43 -0700534static void moxa_wait_finish(void __iomem *ofsAddr)
535{
536 unsigned long end = jiffies + moxaFuncTout;
537
538 while (readw(ofsAddr + FuncCode) != 0)
539 if (time_after(jiffies, end))
540 return;
Manuel Zerpies5a3c6b2512011-06-16 14:07:22 +0200541 if (readw(ofsAddr + FuncCode) != 0)
542 printk_ratelimited(KERN_WARNING "moxa function expired\n");
Jiri Slaby74d7d972008-04-30 00:53:43 -0700543}
544
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700545static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700546{
Alan Coxf5c5a362009-11-30 13:17:57 +0000547 unsigned long flags;
548 spin_lock_irqsave(&moxafunc_lock, flags);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700549 writew(arg, ofsAddr + FuncArg);
550 writew(cmd, ofsAddr + FuncCode);
551 moxa_wait_finish(ofsAddr);
Alan Coxf5c5a362009-11-30 13:17:57 +0000552 spin_unlock_irqrestore(&moxafunc_lock, flags);
553}
554
555static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
556{
557 unsigned long flags;
558 u16 ret;
559 spin_lock_irqsave(&moxafunc_lock, flags);
560 writew(arg, ofsAddr + FuncArg);
561 writew(cmd, ofsAddr + FuncCode);
562 moxa_wait_finish(ofsAddr);
563 ret = readw(ofsAddr + FuncArg);
564 spin_unlock_irqrestore(&moxafunc_lock, flags);
565 return ret;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700566}
567
Jiri Slaby7bcf97d2008-04-30 00:53:43 -0700568static void moxa_low_water_check(void __iomem *ofsAddr)
569{
570 u16 rptr, wptr, mask, len;
571
572 if (readb(ofsAddr + FlagStat) & Xoff_state) {
573 rptr = readw(ofsAddr + RXrptr);
574 wptr = readw(ofsAddr + RXwptr);
575 mask = readw(ofsAddr + RX_mask);
576 len = (wptr - rptr) & mask;
577 if (len <= Low_water)
578 moxafunc(ofsAddr, FC_SendXon, 0);
579 }
580}
581
Jiri Slaby74d7d972008-04-30 00:53:43 -0700582/*
583 * TTY operations
584 */
585
Alan Cox6caa76b2011-02-14 16:27:22 +0000586static int moxa_ioctl(struct tty_struct *tty,
Jiri Slaby74d7d972008-04-30 00:53:43 -0700587 unsigned int cmd, unsigned long arg)
588{
589 struct moxa_port *ch = tty->driver_data;
590 void __user *argp = (void __user *)arg;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700591 int status, ret = 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700592
593 if (tty->index == MAX_PORTS) {
594 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
595 cmd != MOXA_GETMSTATUS)
596 return -EINVAL;
597 } else if (!ch)
598 return -ENODEV;
599
600 switch (cmd) {
601 case MOXA_GETDATACOUNT:
602 moxaLog.tick = jiffies;
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700603 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
604 ret = -EFAULT;
605 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700606 case MOXA_FLUSH_QUEUE:
607 MoxaPortFlushData(ch, arg);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700608 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700609 case MOXA_GET_IOQUEUE: {
610 struct moxaq_str __user *argm = argp;
611 struct moxaq_str tmp;
612 struct moxa_port *p;
613 unsigned int i, j;
614
615 for (i = 0; i < MAX_BOARDS; i++) {
616 p = moxa_boards[i].ports;
617 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
618 memset(&tmp, 0, sizeof(tmp));
Alan Coxe8c62102009-11-30 13:18:24 +0000619 spin_lock_bh(&moxa_lock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700620 if (moxa_boards[i].ready) {
621 tmp.inq = MoxaPortRxQueue(p);
622 tmp.outq = MoxaPortTxQueue(p);
623 }
Alan Coxe8c62102009-11-30 13:18:24 +0000624 spin_unlock_bh(&moxa_lock);
625 if (copy_to_user(argm, &tmp, sizeof(tmp)))
Jiri Slaby74d7d972008-04-30 00:53:43 -0700626 return -EFAULT;
627 }
628 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700629 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700630 } case MOXA_GET_OQUEUE:
631 status = MoxaPortTxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700632 ret = put_user(status, (unsigned long __user *)argp);
633 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700634 case MOXA_GET_IQUEUE:
635 status = MoxaPortRxQueue(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700636 ret = put_user(status, (unsigned long __user *)argp);
637 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700638 case MOXA_GETMSTATUS: {
639 struct mxser_mstatus __user *argm = argp;
640 struct mxser_mstatus tmp;
641 struct moxa_port *p;
642 unsigned int i, j;
643
644 for (i = 0; i < MAX_BOARDS; i++) {
645 p = moxa_boards[i].ports;
646 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
Alan Coxd450b5a2008-10-13 10:39:58 +0100647 struct tty_struct *ttyp;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700648 memset(&tmp, 0, sizeof(tmp));
Alan Coxe8c62102009-11-30 13:18:24 +0000649 spin_lock_bh(&moxa_lock);
650 if (!moxa_boards[i].ready) {
651 spin_unlock_bh(&moxa_lock);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700652 goto copy;
Alan Coxe8c62102009-11-30 13:18:24 +0000653 }
Jiri Slaby74d7d972008-04-30 00:53:43 -0700654
655 status = MoxaPortLineStatus(p);
Alan Coxe8c62102009-11-30 13:18:24 +0000656 spin_unlock_bh(&moxa_lock);
657
Jiri Slaby74d7d972008-04-30 00:53:43 -0700658 if (status & 1)
659 tmp.cts = 1;
660 if (status & 2)
661 tmp.dsr = 1;
662 if (status & 4)
663 tmp.dcd = 1;
664
Alan Coxd450b5a2008-10-13 10:39:58 +0100665 ttyp = tty_port_tty_get(&p->port);
Alan Coxadc8d742012-07-14 15:31:47 +0100666 if (!ttyp)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700667 tmp.cflag = p->cflag;
668 else
Alan Coxadc8d742012-07-14 15:31:47 +0100669 tmp.cflag = ttyp->termios.c_cflag;
Julia Lawalldf43daa2011-04-22 22:46:21 +0200670 tty_kref_put(ttyp);
Jiri Slaby74d7d972008-04-30 00:53:43 -0700671copy:
Alan Coxe8c62102009-11-30 13:18:24 +0000672 if (copy_to_user(argm, &tmp, sizeof(tmp)))
Jiri Slaby74d7d972008-04-30 00:53:43 -0700673 return -EFAULT;
674 }
675 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700676 break;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700677 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700678 default:
679 ret = -ENOIOCTLCMD;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700680 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -0700681 return ret;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700682}
683
Alan Cox9e98966c2008-07-22 11:18:03 +0100684static int moxa_break_ctl(struct tty_struct *tty, int state)
Jiri Slaby74d7d972008-04-30 00:53:43 -0700685{
686 struct moxa_port *port = tty->driver_data;
687
688 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
689 Magic_code);
Alan Cox9e98966c2008-07-22 11:18:03 +0100690 return 0;
Jiri Slaby74d7d972008-04-30 00:53:43 -0700691}
692
Jeff Dikeb68e31d2006-10-02 02:17:18 -0700693static const struct tty_operations moxa_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 .open = moxa_open,
695 .close = moxa_close,
696 .write = moxa_write,
697 .write_room = moxa_write_room,
698 .flush_buffer = moxa_flush_buffer,
699 .chars_in_buffer = moxa_chars_in_buffer,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 .ioctl = moxa_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 .set_termios = moxa_set_termios,
702 .stop = moxa_stop,
703 .start = moxa_start,
704 .hangup = moxa_hangup,
Jiri Slaby74d7d972008-04-30 00:53:43 -0700705 .break_ctl = moxa_break_ctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 .tiocmget = moxa_tiocmget,
707 .tiocmset = moxa_tiocmset,
Al Viro1c729ab2018-09-11 22:01:00 -0400708 .set_serial = moxa_set_serial_info,
709 .get_serial = moxa_get_serial_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710};
711
Alan Cox31f35932009-01-02 13:45:05 +0000712static const struct tty_port_operations moxa_port_ops = {
713 .carrier_raised = moxa_carrier_raised,
Alan Coxf1761782009-11-30 13:17:51 +0000714 .dtr_rts = moxa_dtr_rts,
715 .shutdown = moxa_shutdown,
Alan Cox31f35932009-01-02 13:45:05 +0000716};
717
Jiri Slabyaa7e5222007-02-10 01:45:27 -0800718static struct tty_driver *moxaDriver;
Kees Cook1d27e3e2017-10-04 16:27:04 -0700719static DEFINE_TIMER(moxaTimer, moxa_poll);
Alan Cox33f0f882006-01-09 20:54:13 -0800720
Jiri Slaby74d7d972008-04-30 00:53:43 -0700721/*
722 * HW init
723 */
724
Jiri Slaby03718232008-04-30 00:53:39 -0700725static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
726{
727 switch (brd->boardType) {
728 case MOXA_BOARD_C218_ISA:
729 case MOXA_BOARD_C218_PCI:
730 if (model != 1)
731 goto err;
732 break;
733 case MOXA_BOARD_CP204J:
734 if (model != 3)
735 goto err;
736 break;
737 default:
738 if (model != 2)
739 goto err;
740 break;
741 }
742 return 0;
743err:
744 return -EINVAL;
745}
746
747static int moxa_check_fw(const void *ptr)
748{
749 const __le16 *lptr = ptr;
750
751 if (*lptr != cpu_to_le16(0x7980))
752 return -EINVAL;
753
754 return 0;
755}
756
757static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
758 size_t len)
759{
760 void __iomem *baseAddr = brd->basemem;
761 u16 tmp;
762
763 writeb(HW_reset, baseAddr + Control_reg); /* reset */
764 msleep(10);
765 memset_io(baseAddr, 0, 4096);
766 memcpy_toio(baseAddr, buf, len); /* download BIOS */
767 writeb(0, baseAddr + Control_reg); /* restart */
768
769 msleep(2000);
770
771 switch (brd->boardType) {
772 case MOXA_BOARD_C218_ISA:
773 case MOXA_BOARD_C218_PCI:
774 tmp = readw(baseAddr + C218_key);
775 if (tmp != C218_KeyCode)
776 goto err;
777 break;
778 case MOXA_BOARD_CP204J:
779 tmp = readw(baseAddr + C218_key);
780 if (tmp != CP204J_KeyCode)
781 goto err;
782 break;
783 default:
784 tmp = readw(baseAddr + C320_key);
785 if (tmp != C320_KeyCode)
786 goto err;
787 tmp = readw(baseAddr + C320_status);
788 if (tmp != STS_init) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700789 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
Jiri Slaby03718232008-04-30 00:53:39 -0700790 "module not found\n");
791 return -EIO;
792 }
793 break;
794 }
795
796 return 0;
797err:
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700798 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700799 return -EIO;
800}
801
802static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
803 size_t len)
804{
805 void __iomem *baseAddr = brd->basemem;
806
807 if (len < 7168) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700808 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700809 return -EINVAL;
810 }
811
812 writew(len - 7168 - 2, baseAddr + C320bapi_len);
813 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
814 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
815 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
816 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
817
818 return 0;
819}
820
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700821static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
Jiri Slaby03718232008-04-30 00:53:39 -0700822 size_t len)
823{
824 void __iomem *baseAddr = brd->basemem;
Harvey Harrisonb46f69c2008-10-15 22:04:19 -0700825 const __le16 *uptr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -0700826 size_t wlen, len2, j;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700827 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
Jiri Slaby08d01c72008-04-30 00:53:47 -0700828 unsigned int i, retry;
Jiri Slaby03718232008-04-30 00:53:39 -0700829 u16 usum, keycode;
830
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700831 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
832 C218_KeyCode;
833
834 switch (brd->boardType) {
835 case MOXA_BOARD_CP204J:
836 case MOXA_BOARD_C218_ISA:
837 case MOXA_BOARD_C218_PCI:
838 key = C218_key;
839 loadbuf = C218_LoadBuf;
840 loadlen = C218DLoad_len;
841 checksum = C218check_sum;
842 checksum_ok = C218chksum_ok;
843 break;
844 default:
845 key = C320_key;
846 keycode = C320_KeyCode;
847 loadbuf = C320_LoadBuf;
848 loadlen = C320DLoad_len;
849 checksum = C320check_sum;
850 checksum_ok = C320chksum_ok;
851 break;
852 }
853
Jiri Slaby03718232008-04-30 00:53:39 -0700854 usum = 0;
855 wlen = len >> 1;
856 for (i = 0; i < wlen; i++)
857 usum += le16_to_cpu(uptr[i]);
858 retry = 0;
859 do {
860 wlen = len >> 1;
861 j = 0;
862 while (wlen) {
863 len2 = (wlen > 2048) ? 2048 : wlen;
864 wlen -= len2;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700865 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
Jiri Slaby03718232008-04-30 00:53:39 -0700866 j += len2 << 1;
867
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700868 writew(len2, baseAddr + loadlen);
869 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700870 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700871 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700872 break;
873 msleep(10);
874 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700875 if (readw(baseAddr + key) != keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700876 return -EIO;
877 }
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700878 writew(0, baseAddr + loadlen);
879 writew(usum, baseAddr + checksum);
880 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700881 for (i = 0; i < 100; i++) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700882 if (readw(baseAddr + key) == keycode)
Jiri Slaby03718232008-04-30 00:53:39 -0700883 break;
884 msleep(10);
885 }
886 retry++;
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700887 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
888 if (readb(baseAddr + checksum_ok) != 1)
Jiri Slaby03718232008-04-30 00:53:39 -0700889 return -EIO;
890
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700891 writew(0, baseAddr + key);
Jiri Slaby03718232008-04-30 00:53:39 -0700892 for (i = 0; i < 600; i++) {
893 if (readw(baseAddr + Magic_no) == Magic_code)
894 break;
895 msleep(10);
896 }
897 if (readw(baseAddr + Magic_no) != Magic_code)
898 return -EIO;
899
Jiri Slaby08d01c72008-04-30 00:53:47 -0700900 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700901 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
902 writew(0x3800, baseAddr + TMS320_PORT1);
903 writew(0x3900, baseAddr + TMS320_PORT2);
904 writew(28499, baseAddr + TMS320_CLOCK);
905 } else {
906 writew(0x3200, baseAddr + TMS320_PORT1);
907 writew(0x3400, baseAddr + TMS320_PORT2);
908 writew(19999, baseAddr + TMS320_CLOCK);
909 }
Jiri Slaby03718232008-04-30 00:53:39 -0700910 }
911 writew(1, baseAddr + Disable_IRQ);
912 writew(0, baseAddr + Magic_no);
913 for (i = 0; i < 500; i++) {
914 if (readw(baseAddr + Magic_no) == Magic_code)
915 break;
916 msleep(10);
917 }
918 if (readw(baseAddr + Magic_no) != Magic_code)
919 return -EIO;
920
Jiri Slaby08d01c72008-04-30 00:53:47 -0700921 if (MOXA_IS_320(brd)) {
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700922 j = readw(baseAddr + Module_cnt);
923 if (j <= 0)
924 return -EIO;
925 brd->numPorts = j * 8;
926 writew(j, baseAddr + Module_no);
927 writew(0, baseAddr + Magic_no);
928 for (i = 0; i < 600; i++) {
929 if (readw(baseAddr + Magic_no) == Magic_code)
930 break;
931 msleep(10);
932 }
933 if (readw(baseAddr + Magic_no) != Magic_code)
934 return -EIO;
Jiri Slaby03718232008-04-30 00:53:39 -0700935 }
Jiri Slaby03718232008-04-30 00:53:39 -0700936 brd->intNdx = baseAddr + IRQindex;
937 brd->intPend = baseAddr + IRQpending;
938 brd->intTable = baseAddr + IRQtable;
939
940 return 0;
941}
942
943static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
944 size_t len)
945{
946 void __iomem *ofsAddr, *baseAddr = brd->basemem;
947 struct moxa_port *port;
948 int retval, i;
949
950 if (len % 2) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -0700951 printk(KERN_ERR "MOXA: bios length is not even\n");
Jiri Slaby03718232008-04-30 00:53:39 -0700952 return -EINVAL;
953 }
954
Jiri Slaby5292bcd2008-04-30 00:53:39 -0700955 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
956 if (retval)
957 return retval;
958
Jiri Slaby03718232008-04-30 00:53:39 -0700959 switch (brd->boardType) {
960 case MOXA_BOARD_C218_ISA:
961 case MOXA_BOARD_C218_PCI:
962 case MOXA_BOARD_CP204J:
Jiri Slaby03718232008-04-30 00:53:39 -0700963 port = brd->ports;
964 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700965 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700966 port->DCDState = 0;
967 port->tableAddr = baseAddr + Extern_table +
968 Extern_size * i;
969 ofsAddr = port->tableAddr;
970 writew(C218rx_mask, ofsAddr + RX_mask);
971 writew(C218tx_mask, ofsAddr + TX_mask);
972 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
973 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
974
975 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
976 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
977
978 }
979 break;
980 default:
Jiri Slaby03718232008-04-30 00:53:39 -0700981 port = brd->ports;
982 for (i = 0; i < brd->numPorts; i++, port++) {
Jiri Slabyb4173f42008-04-30 00:53:40 -0700983 port->board = brd;
Jiri Slaby03718232008-04-30 00:53:39 -0700984 port->DCDState = 0;
985 port->tableAddr = baseAddr + Extern_table +
986 Extern_size * i;
987 ofsAddr = port->tableAddr;
988 switch (brd->numPorts) {
989 case 8:
990 writew(C320p8rx_mask, ofsAddr + RX_mask);
991 writew(C320p8tx_mask, ofsAddr + TX_mask);
992 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
993 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
994 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
995 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
996
997 break;
998 case 16:
999 writew(C320p16rx_mask, ofsAddr + RX_mask);
1000 writew(C320p16tx_mask, ofsAddr + TX_mask);
1001 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
1002 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
1003 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
1004 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
1005 break;
1006
1007 case 24:
1008 writew(C320p24rx_mask, ofsAddr + RX_mask);
1009 writew(C320p24tx_mask, ofsAddr + TX_mask);
1010 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
1011 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
1012 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
1013 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
1014 break;
1015 case 32:
1016 writew(C320p32rx_mask, ofsAddr + RX_mask);
1017 writew(C320p32tx_mask, ofsAddr + TX_mask);
1018 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
1019 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
1020 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
1021 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
1022 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
1023 break;
1024 }
1025 }
1026 break;
1027 }
Jiri Slaby03718232008-04-30 00:53:39 -07001028 return 0;
1029}
1030
1031static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
1032{
David Howells2bca76e2008-07-08 17:37:15 +01001033 const void *ptr = fw->data;
Jiri Slaby03718232008-04-30 00:53:39 -07001034 char rsn[64];
1035 u16 lens[5];
1036 size_t len;
1037 unsigned int a, lenp, lencnt;
1038 int ret = -EINVAL;
1039 struct {
1040 __le32 magic; /* 0x34303430 */
1041 u8 reserved1[2];
1042 u8 type; /* UNIX = 3 */
1043 u8 model; /* C218T=1, C320T=2, CP204=3 */
1044 u8 reserved2[8];
1045 __le16 len[5];
David Howells2bca76e2008-07-08 17:37:15 +01001046 } const *hdr = ptr;
Jiri Slaby03718232008-04-30 00:53:39 -07001047
1048 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
1049
1050 if (fw->size < MOXA_FW_HDRLEN) {
1051 strcpy(rsn, "too short (even header won't fit)");
1052 goto err;
1053 }
1054 if (hdr->magic != cpu_to_le32(0x30343034)) {
1055 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
1056 goto err;
1057 }
1058 if (hdr->type != 3) {
1059 sprintf(rsn, "not for linux, type is %u", hdr->type);
1060 goto err;
1061 }
1062 if (moxa_check_fw_model(brd, hdr->model)) {
1063 sprintf(rsn, "not for this card, model is %u", hdr->model);
1064 goto err;
1065 }
1066
1067 len = MOXA_FW_HDRLEN;
1068 lencnt = hdr->model == 2 ? 5 : 3;
1069 for (a = 0; a < ARRAY_SIZE(lens); a++) {
1070 lens[a] = le16_to_cpu(hdr->len[a]);
1071 if (lens[a] && len + lens[a] <= fw->size &&
1072 moxa_check_fw(&fw->data[len]))
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001073 printk(KERN_WARNING "MOXA firmware: unexpected input "
Jiri Slaby03718232008-04-30 00:53:39 -07001074 "at offset %u, but going on\n", (u32)len);
1075 if (!lens[a] && a < lencnt) {
1076 sprintf(rsn, "too few entries in fw file");
1077 goto err;
1078 }
1079 len += lens[a];
1080 }
1081
1082 if (len != fw->size) {
1083 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
1084 (u32)len);
1085 goto err;
1086 }
1087
1088 ptr += MOXA_FW_HDRLEN;
1089 lenp = 0; /* bios */
1090
1091 strcpy(rsn, "read above");
1092
1093 ret = moxa_load_bios(brd, ptr, lens[lenp]);
1094 if (ret)
1095 goto err;
1096
1097 /* we skip the tty section (lens[1]), since we don't need it */
1098 ptr += lens[lenp] + lens[lenp + 1];
1099 lenp += 2; /* comm */
1100
1101 if (hdr->model == 2) {
1102 ret = moxa_load_320b(brd, ptr, lens[lenp]);
1103 if (ret)
1104 goto err;
1105 /* skip another tty */
1106 ptr += lens[lenp] + lens[lenp + 1];
1107 lenp += 2;
1108 }
1109
1110 ret = moxa_load_code(brd, ptr, lens[lenp]);
1111 if (ret)
1112 goto err;
1113
1114 return 0;
1115err:
1116 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
1117 return ret;
1118}
1119
1120static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
1121{
1122 const struct firmware *fw;
1123 const char *file;
Jiri Slaby810ab092008-04-30 00:53:41 -07001124 struct moxa_port *p;
Jiri Slaby793be892012-08-07 21:47:55 +02001125 unsigned int i, first_idx;
Jiri Slaby03718232008-04-30 00:53:39 -07001126 int ret;
1127
Jiri Slaby810ab092008-04-30 00:53:41 -07001128 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
1129 GFP_KERNEL);
1130 if (brd->ports == NULL) {
1131 printk(KERN_ERR "cannot allocate memory for ports\n");
1132 ret = -ENOMEM;
1133 goto err;
1134 }
1135
1136 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
Alan Cox9de6a512008-07-16 21:56:02 +01001137 tty_port_init(&p->port);
Alan Cox31f35932009-01-02 13:45:05 +00001138 p->port.ops = &moxa_port_ops;
Alan Cox44b7d1b2008-07-16 21:57:18 +01001139 p->type = PORT_16550A;
1140 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Jiri Slaby810ab092008-04-30 00:53:41 -07001141 }
1142
Jiri Slaby03718232008-04-30 00:53:39 -07001143 switch (brd->boardType) {
1144 case MOXA_BOARD_C218_ISA:
1145 case MOXA_BOARD_C218_PCI:
1146 file = "c218tunx.cod";
1147 break;
1148 case MOXA_BOARD_CP204J:
1149 file = "cp204unx.cod";
1150 break;
1151 default:
1152 file = "c320tunx.cod";
1153 break;
1154 }
1155
1156 ret = request_firmware(&fw, file, dev);
1157 if (ret) {
Jiri Slabyec09cd52008-04-30 00:53:49 -07001158 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
1159 "you've placed '%s' file into your firmware "
1160 "loader directory (e.g. /lib/firmware)\n",
1161 file);
Jiri Slaby810ab092008-04-30 00:53:41 -07001162 goto err_free;
Jiri Slaby03718232008-04-30 00:53:39 -07001163 }
1164
1165 ret = moxa_load_fw(brd, fw);
1166
1167 release_firmware(fw);
Jiri Slaby810ab092008-04-30 00:53:41 -07001168
1169 if (ret)
1170 goto err_free;
1171
Jiri Slaby2a541342008-04-30 00:53:45 -07001172 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -07001173 brd->ready = 1;
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -07001174 if (!timer_pending(&moxaTimer))
1175 mod_timer(&moxaTimer, jiffies + HZ / 50);
Jiri Slaby2a541342008-04-30 00:53:45 -07001176 spin_unlock_bh(&moxa_lock);
Jiri Slaby0bcc4ca2008-04-30 00:53:42 -07001177
Jiri Slaby793be892012-08-07 21:47:55 +02001178 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
1179 for (i = 0; i < brd->numPorts; i++)
1180 tty_port_register_device(&brd->ports[i].port, moxaDriver,
1181 first_idx + i, dev);
1182
Jiri Slaby810ab092008-04-30 00:53:41 -07001183 return 0;
1184err_free:
Jiri Slaby191c5f12012-11-15 09:49:56 +01001185 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
1186 tty_port_destroy(&brd->ports[i].port);
Jiri Slaby810ab092008-04-30 00:53:41 -07001187 kfree(brd->ports);
1188err:
Jiri Slaby03718232008-04-30 00:53:39 -07001189 return ret;
1190}
1191
Jiri Slaby810ab092008-04-30 00:53:41 -07001192static void moxa_board_deinit(struct moxa_board_conf *brd)
1193{
Jiri Slaby793be892012-08-07 21:47:55 +02001194 unsigned int a, opened, first_idx;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001195
1196 mutex_lock(&moxa_openlock);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001197 spin_lock_bh(&moxa_lock);
Jiri Slaby810ab092008-04-30 00:53:41 -07001198 brd->ready = 0;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001199 spin_unlock_bh(&moxa_lock);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001200
1201 /* pci hot-un-plug support */
1202 for (a = 0; a < brd->numPorts; a++)
Peter Hurleyd41861c2016-04-09 17:53:25 -07001203 if (tty_port_initialized(&brd->ports[a].port))
Jiri Slabyaa27a092013-03-07 13:12:30 +01001204 tty_port_tty_hangup(&brd->ports[a].port, false);
1205
Jiri Slaby191c5f12012-11-15 09:49:56 +01001206 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
1207 tty_port_destroy(&brd->ports[a].port);
Jiri Slabyaa27a092013-03-07 13:12:30 +01001208
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001209 while (1) {
1210 opened = 0;
1211 for (a = 0; a < brd->numPorts; a++)
Peter Hurleyd41861c2016-04-09 17:53:25 -07001212 if (tty_port_initialized(&brd->ports[a].port))
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001213 opened++;
1214 mutex_unlock(&moxa_openlock);
1215 if (!opened)
1216 break;
1217 msleep(50);
1218 mutex_lock(&moxa_openlock);
1219 }
1220
Jiri Slaby793be892012-08-07 21:47:55 +02001221 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
1222 for (a = 0; a < brd->numPorts; a++)
1223 tty_unregister_device(moxaDriver, first_idx + a);
1224
Jiri Slaby810ab092008-04-30 00:53:41 -07001225 iounmap(brd->basemem);
1226 brd->basemem = NULL;
1227 kfree(brd->ports);
1228}
1229
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230#ifdef CONFIG_PCI
Bill Pemberton9671f092012-11-19 13:21:50 -05001231static int moxa_pci_probe(struct pci_dev *pdev,
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001232 const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001234 struct moxa_board_conf *board;
1235 unsigned int i;
1236 int board_type = ent->driver_data;
1237 int retval;
1238
1239 retval = pci_enable_device(pdev);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001240 if (retval) {
1241 dev_err(&pdev->dev, "can't enable pci device\n");
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001242 goto err;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001243 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001244
1245 for (i = 0; i < MAX_BOARDS; i++)
1246 if (moxa_boards[i].basemem == NULL)
1247 break;
1248
1249 retval = -ENODEV;
1250 if (i >= MAX_BOARDS) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001251 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001252 "found. Board is ignored.\n", MAX_BOARDS);
1253 goto err;
1254 }
1255
1256 board = &moxa_boards[i];
Jiri Slabye46a5e32008-04-30 00:53:37 -07001257
1258 retval = pci_request_region(pdev, 2, "moxa-base");
1259 if (retval) {
1260 dev_err(&pdev->dev, "can't request pci region 2\n");
1261 goto err;
1262 }
1263
Christoph Hellwig4bdc0d62020-01-06 09:43:50 +01001264 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001265 if (board->basemem == NULL) {
1266 dev_err(&pdev->dev, "can't remap io space 2\n");
Julia Lawall386d95b2012-08-14 08:47:35 +02001267 retval = -ENOMEM;
Jiri Slabye46a5e32008-04-30 00:53:37 -07001268 goto err_reg;
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001269 }
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001270
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 board->boardType = board_type;
1272 switch (board_type) {
1273 case MOXA_BOARD_C218_ISA:
1274 case MOXA_BOARD_C218_PCI:
1275 board->numPorts = 8;
1276 break;
1277
1278 case MOXA_BOARD_CP204J:
1279 board->numPorts = 4;
1280 break;
1281 default:
1282 board->numPorts = 0;
1283 break;
1284 }
1285 board->busType = MOXA_BUS_TYPE_PCI;
Jiri Slabya784bf72007-02-10 01:45:36 -08001286
Jiri Slaby03718232008-04-30 00:53:39 -07001287 retval = moxa_init_board(board, &pdev->dev);
1288 if (retval)
1289 goto err_base;
1290
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001291 pci_set_drvdata(pdev, board);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
Jiri Slabybb9f9102008-04-30 00:53:48 -07001293 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1294 moxa_brdname[board_type - 1], board->numPorts);
1295
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001296 return 0;
Jiri Slaby03718232008-04-30 00:53:39 -07001297err_base:
1298 iounmap(board->basemem);
1299 board->basemem = NULL;
Jiri Slabye46a5e32008-04-30 00:53:37 -07001300err_reg:
1301 pci_release_region(pdev, 2);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001302err:
1303 return retval;
1304}
1305
Bill Pembertonae8d8a12012-11-19 13:26:18 -05001306static void moxa_pci_remove(struct pci_dev *pdev)
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001307{
1308 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1309
Jiri Slaby810ab092008-04-30 00:53:41 -07001310 moxa_board_deinit(brd);
1311
Jiri Slabye46a5e32008-04-30 00:53:37 -07001312 pci_release_region(pdev, 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313}
Jiri Slabya784bf72007-02-10 01:45:36 -08001314
1315static struct pci_driver moxa_pci_driver = {
1316 .name = "moxa",
1317 .id_table = moxa_pcibrds,
1318 .probe = moxa_pci_probe,
Bill Pemberton91116cb2012-11-19 13:21:06 -05001319 .remove = moxa_pci_remove
Jiri Slabya784bf72007-02-10 01:45:36 -08001320};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321#endif /* CONFIG_PCI */
1322
1323static int __init moxa_init(void)
1324{
Jiri Slaby810ab092008-04-30 00:53:41 -07001325 unsigned int isabrds = 0;
Jiri Slabyd353eca2008-04-30 00:53:37 -07001326 int retval = 0;
Rakib Mullickc6fc8262009-12-09 12:34:18 -08001327 struct moxa_board_conf *brd = moxa_boards;
1328 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001330 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1331 MOXA_VERSION);
Jiri Slaby793be892012-08-07 21:47:55 +02001332
1333 tty_port_init(&moxa_service_port);
1334
1335 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1336 TTY_DRIVER_REAL_RAW |
1337 TTY_DRIVER_DYNAMIC_DEV);
Dan Carpenterc3a63442012-08-16 16:16:56 +03001338 if (IS_ERR(moxaDriver))
1339 return PTR_ERR(moxaDriver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340
Sergey Vlasov9b4e3b12005-09-03 16:26:49 +01001341 moxaDriver->name = "ttyMX";
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 moxaDriver->major = ttymajor;
1343 moxaDriver->minor_start = 0;
1344 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1345 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1346 moxaDriver->init_termios = tty_std_termios;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
Alan Cox606d0992006-12-08 02:38:45 -08001348 moxaDriver->init_termios.c_ispeed = 9600;
1349 moxaDriver->init_termios.c_ospeed = 9600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 tty_set_operations(moxaDriver, &moxa_ops);
Jiri Slaby793be892012-08-07 21:47:55 +02001351 /* Having one more port only for ioctls is ugly */
1352 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 if (tty_register_driver(moxaDriver)) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001355 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
Jiri Slaby9f90a4d2021-07-23 09:43:16 +02001356 tty_driver_kref_put(moxaDriver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 return -1;
1358 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
Jiri Slabyd353eca2008-04-30 00:53:37 -07001360 /* Find the boards defined from module args. */
Rakib Mullickc6fc8262009-12-09 12:34:18 -08001361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 for (i = 0; i < MAX_BOARDS; i++) {
Jiri Slabyd353eca2008-04-30 00:53:37 -07001363 if (!baseaddr[i])
1364 break;
1365 if (type[i] == MOXA_BOARD_C218_ISA ||
1366 type[i] == MOXA_BOARD_C320_ISA) {
Jiri Slaby7aeb95d2007-10-18 03:06:24 -07001367 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001368 isabrds + 1, moxa_brdname[type[i] - 1],
1369 baseaddr[i]);
1370 brd->boardType = type[i];
1371 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1372 numports[i];
1373 brd->busType = MOXA_BUS_TYPE_ISA;
Christoph Hellwig4bdc0d62020-01-06 09:43:50 +01001374 brd->basemem = ioremap(baseaddr[i], 0x4000);
Jiri Slabyd353eca2008-04-30 00:53:37 -07001375 if (!brd->basemem) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001376 printk(KERN_ERR "MOXA: can't remap %lx\n",
Jiri Slabyd353eca2008-04-30 00:53:37 -07001377 baseaddr[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 continue;
1379 }
Jiri Slaby03718232008-04-30 00:53:39 -07001380 if (moxa_init_board(brd, NULL)) {
1381 iounmap(brd->basemem);
1382 brd->basemem = NULL;
1383 continue;
1384 }
Jiri Slabyd353eca2008-04-30 00:53:37 -07001385
Hans Wennborge0525392014-08-05 21:43:42 -07001386 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
Jiri Slabybb9f9102008-04-30 00:53:48 -07001387 "ready (%u ports, firmware loaded)\n",
1388 baseaddr[i], brd->numPorts);
1389
Jiri Slabyd353eca2008-04-30 00:53:37 -07001390 brd++;
1391 isabrds++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 }
1393 }
Jiri Slabya784bf72007-02-10 01:45:36 -08001394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001396 retval = pci_register_driver(&moxa_pci_driver);
1397 if (retval) {
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001398 printk(KERN_ERR "Can't register MOXA pci driver!\n");
Jiri Slabyd353eca2008-04-30 00:53:37 -07001399 if (isabrds)
Jiri Slabya784bf72007-02-10 01:45:36 -08001400 retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 }
1402#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001403
Jiri Slabya784bf72007-02-10 01:45:36 -08001404 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405}
1406
1407static void __exit moxa_exit(void)
1408{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001409 unsigned int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001411#ifdef CONFIG_PCI
Jiri Slabya784bf72007-02-10 01:45:36 -08001412 pci_unregister_driver(&moxa_pci_driver);
Jiri Slaby9cde5bf2007-02-10 01:45:35 -08001413#endif
Jiri Slabya784bf72007-02-10 01:45:36 -08001414
Jiri Slaby810ab092008-04-30 00:53:41 -07001415 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1416 if (moxa_boards[i].ready)
1417 moxa_board_deinit(&moxa_boards[i]);
Jiri Slaby2a541342008-04-30 00:53:45 -07001418
1419 del_timer_sync(&moxaTimer);
1420
Jiri Slaby6c2e6312021-03-02 07:22:04 +01001421 tty_unregister_driver(moxaDriver);
Jiri Slaby9f90a4d2021-07-23 09:43:16 +02001422 tty_driver_kref_put(moxaDriver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423}
1424
1425module_init(moxa_init);
1426module_exit(moxa_exit);
1427
Alan Coxf1761782009-11-30 13:17:51 +00001428static void moxa_shutdown(struct tty_port *port)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001429{
Alan Coxf1761782009-11-30 13:17:51 +00001430 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1431 MoxaPortDisable(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001432 MoxaPortFlushData(ch, 2);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001433}
1434
Ilpo Järvinenb300fb22023-01-17 11:03:52 +02001435static bool moxa_carrier_raised(struct tty_port *port)
Alan Cox31f35932009-01-02 13:45:05 +00001436{
1437 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1438 int dcd;
1439
Alan Cox8482bcd2009-11-30 13:18:13 +00001440 spin_lock_irq(&port->lock);
Alan Cox31f35932009-01-02 13:45:05 +00001441 dcd = ch->DCDState;
Alan Cox8482bcd2009-11-30 13:18:13 +00001442 spin_unlock_irq(&port->lock);
Alan Cox31f35932009-01-02 13:45:05 +00001443 return dcd;
1444}
1445
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001446static void moxa_dtr_rts(struct tty_port *port, bool active)
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001447{
Alan Coxf1761782009-11-30 13:17:51 +00001448 struct moxa_port *ch = container_of(port, struct moxa_port, port);
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001449 MoxaPortLineCtrl(ch, active, active);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001450}
1451
Alan Coxf1761782009-11-30 13:17:51 +00001452
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453static int moxa_open(struct tty_struct *tty, struct file *filp)
1454{
Jiri Slaby810ab092008-04-30 00:53:41 -07001455 struct moxa_board_conf *brd;
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001456 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 int port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
Jiri Slaby11324ed2007-02-10 01:45:31 -08001459 port = tty->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 if (port == MAX_PORTS) {
Jiri Slaby74d7d972008-04-30 00:53:43 -07001461 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 }
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001463 if (mutex_lock_interruptible(&moxa_openlock))
1464 return -ERESTARTSYS;
Jiri Slaby810ab092008-04-30 00:53:41 -07001465 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001466 if (!brd->ready) {
1467 mutex_unlock(&moxa_openlock);
Jiri Slaby810ab092008-04-30 00:53:41 -07001468 return -ENODEV;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001469 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470
Dirk Eibachf0e85272009-06-11 14:56:44 +01001471 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1472 mutex_unlock(&moxa_openlock);
1473 return -ENODEV;
1474 }
1475
Jiri Slaby810ab092008-04-30 00:53:41 -07001476 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
Alan Cox9de6a512008-07-16 21:56:02 +01001477 ch->port.count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 tty->driver_data = ch;
Alan Coxd450b5a2008-10-13 10:39:58 +01001479 tty_port_tty_set(&ch->port, tty);
Alan Coxf1761782009-11-30 13:17:51 +00001480 mutex_lock(&ch->port.mutex);
Peter Hurleyd41861c2016-04-09 17:53:25 -07001481 if (!tty_port_initialized(&ch->port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 ch->statusflags = 0;
Alan Coxadc8d742012-07-14 15:31:47 +01001483 moxa_set_tty_param(tty, &tty->termios);
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001484 MoxaPortLineCtrl(ch, true, true);
Jiri Slabyb4173f42008-04-30 00:53:40 -07001485 MoxaPortEnable(ch);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001486 MoxaSetFifo(ch, ch->type == PORT_16550A);
Ilpo Järvinen515be7ba2023-01-17 11:03:47 +02001487 tty_port_set_initialized(&ch->port, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 }
Alan Coxf1761782009-11-30 13:17:51 +00001489 mutex_unlock(&ch->port.mutex);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001490 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491
Jiri Slaby7c31bdb2011-03-29 23:23:41 +02001492 return tty_port_block_til_ready(&ch->port, tty, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493}
1494
1495static void moxa_close(struct tty_struct *tty, struct file *filp)
1496{
Alan Coxf1761782009-11-30 13:17:51 +00001497 struct moxa_port *ch = tty->driver_data;
Alan Coxadc8d742012-07-14 15:31:47 +01001498 ch->cflag = tty->termios.c_cflag;
Alan Coxf1761782009-11-30 13:17:51 +00001499 tty_port_close(&ch->port, tty, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500}
1501
1502static int moxa_write(struct tty_struct *tty,
1503 const unsigned char *buf, int count)
1504{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001505 struct moxa_port *ch = tty->driver_data;
Jiri Slaby0ad7c9a2011-04-20 10:43:15 +02001506 unsigned long flags;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001507 int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 if (ch == NULL)
Jiri Slabyb4173f42008-04-30 00:53:40 -07001510 return 0;
Alan Cox33f0f882006-01-09 20:54:13 -08001511
Jiri Slaby0ad7c9a2011-04-20 10:43:15 +02001512 spin_lock_irqsave(&moxa_lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001513 len = MoxaPortWriteData(tty, buf, count);
Jiri Slaby0ad7c9a2011-04-20 10:43:15 +02001514 spin_unlock_irqrestore(&moxa_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515
Alan Coxa808ac02009-11-30 13:18:02 +00001516 set_bit(LOWWAIT, &ch->statusflags);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001517 return len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518}
1519
Jiri Slaby03b3b1a2021-05-05 11:19:15 +02001520static unsigned int moxa_write_room(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521{
Jiri Slaby8f8ecba2007-02-10 01:45:33 -08001522 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Jiri Slaby6e94dbc2021-05-05 11:19:05 +02001524 if (tty->flow.stopped)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001525 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001526 ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 if (ch == NULL)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001528 return 0;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001529 return MoxaPortTxFree(ch);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530}
1531
1532static void moxa_flush_buffer(struct tty_struct *tty)
1533{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001534 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
1536 if (ch == NULL)
1537 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001538 MoxaPortFlushData(ch, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 tty_wakeup(tty);
1540}
1541
Jiri Slabyfff4ef12021-05-05 11:19:19 +02001542static unsigned int moxa_chars_in_buffer(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543{
Jiri Slabyb4173f42008-04-30 00:53:40 -07001544 struct moxa_port *ch = tty->driver_data;
Jiri Slabyfff4ef12021-05-05 11:19:19 +02001545 unsigned int chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546
Jiri Slabyb4173f42008-04-30 00:53:40 -07001547 chars = MoxaPortTxQueue(ch);
Alan Coxf710ebd2009-11-30 13:18:18 +00001548 if (chars)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 /*
1550 * Make it possible to wakeup anything waiting for output
1551 * in tty_ioctl.c, etc.
1552 */
Alan Coxf710ebd2009-11-30 13:18:18 +00001553 set_bit(EMPTYWAIT, &ch->statusflags);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001554 return chars;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555}
1556
Alan Cox60b33c12011-02-14 16:26:14 +00001557static int moxa_tiocmget(struct tty_struct *tty)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558{
Alan Cox8482bcd2009-11-30 13:18:13 +00001559 struct moxa_port *ch = tty->driver_data;
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001560 bool dtr_active, rts_active;
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001561 int flag = 0;
1562 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001564 MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
1565 if (dtr_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 flag |= TIOCM_DTR;
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001567 if (rts_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 flag |= TIOCM_RTS;
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001569 status = MoxaPortLineStatus(ch);
1570 if (status & 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571 flag |= TIOCM_CTS;
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001572 if (status & 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 flag |= TIOCM_DSR;
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001574 if (status & 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 flag |= TIOCM_CD;
1576 return flag;
1577}
1578
Alan Cox20b9d172011-02-14 16:26:50 +00001579static int moxa_tiocmset(struct tty_struct *tty,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 unsigned int set, unsigned int clear)
1581{
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001582 bool dtr_active, rts_active;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001583 struct moxa_port *ch;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001585 mutex_lock(&moxa_openlock);
1586 ch = tty->driver_data;
1587 if (!ch) {
1588 mutex_unlock(&moxa_openlock);
Jiri Slaby74d7d972008-04-30 00:53:43 -07001589 return -EINVAL;
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001590 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001592 MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 if (set & TIOCM_RTS)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001594 rts_active = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 if (set & TIOCM_DTR)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001596 dtr_active = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 if (clear & TIOCM_RTS)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001598 rts_active = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 if (clear & TIOCM_DTR)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001600 dtr_active = false;
1601 MoxaPortLineCtrl(ch, dtr_active, rts_active);
Jiri Slabya8f5cda2008-04-30 00:53:45 -07001602 mutex_unlock(&moxa_openlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 return 0;
1604}
1605
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606static void moxa_set_termios(struct tty_struct *tty,
Ilpo Järvinena8c11c12022-08-16 14:57:39 +03001607 const struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001609 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610
1611 if (ch == NULL)
1612 return;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001613 moxa_set_tty_param(tty, old_termios);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001614 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
Alan Cox9de6a512008-07-16 21:56:02 +01001615 wake_up_interruptible(&ch->port.open_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616}
1617
1618static void moxa_stop(struct tty_struct *tty)
1619{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001620 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
1622 if (ch == NULL)
1623 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001624 MoxaPortTxDisable(ch);
Alan Coxa808ac02009-11-30 13:18:02 +00001625 set_bit(TXSTOPPED, &ch->statusflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626}
1627
1628
1629static void moxa_start(struct tty_struct *tty)
1630{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001631 struct moxa_port *ch = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632
1633 if (ch == NULL)
1634 return;
1635
Dan Carpenter58112dfb2012-03-07 13:05:00 +03001636 if (!test_bit(TXSTOPPED, &ch->statusflags))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637 return;
1638
Jiri Slabyb4173f42008-04-30 00:53:40 -07001639 MoxaPortTxEnable(ch);
Alan Coxa808ac02009-11-30 13:18:02 +00001640 clear_bit(TXSTOPPED, &ch->statusflags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641}
1642
1643static void moxa_hangup(struct tty_struct *tty)
1644{
Alan Coxa808ac02009-11-30 13:18:02 +00001645 struct moxa_port *ch = tty->driver_data;
Alan Coxf1761782009-11-30 13:17:51 +00001646 tty_port_hangup(&ch->port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647}
1648
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001649static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1650{
Alan Cox8482bcd2009-11-30 13:18:13 +00001651 unsigned long flags;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001652 dcd = !!dcd;
1653
Alan Cox8482bcd2009-11-30 13:18:13 +00001654 spin_lock_irqsave(&p->port.lock, flags);
Alan Coxd450b5a2008-10-13 10:39:58 +01001655 if (dcd != p->DCDState) {
Alan Cox8482bcd2009-11-30 13:18:13 +00001656 p->DCDState = dcd;
1657 spin_unlock_irqrestore(&p->port.lock, flags);
Jiri Slabyaa27a092013-03-07 13:12:30 +01001658 if (!dcd)
1659 tty_port_tty_hangup(&p->port, true);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001660 }
Alan Cox8482bcd2009-11-30 13:18:13 +00001661 else
1662 spin_unlock_irqrestore(&p->port.lock, flags);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001663}
1664
1665static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1666 u16 __iomem *ip)
1667{
Alan Coxd450b5a2008-10-13 10:39:58 +01001668 struct tty_struct *tty = tty_port_tty_get(&p->port);
Ilpo Järvinenc2ac4bf2023-01-17 11:03:50 +02001669 bool inited = tty_port_initialized(&p->port);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001670 void __iomem *ofsAddr;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001671 u16 intr;
1672
1673 if (tty) {
Alan Coxa808ac02009-11-30 13:18:02 +00001674 if (test_bit(EMPTYWAIT, &p->statusflags) &&
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001675 MoxaPortTxQueue(p) == 0) {
Alan Coxa808ac02009-11-30 13:18:02 +00001676 clear_bit(EMPTYWAIT, &p->statusflags);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001677 tty_wakeup(tty);
1678 }
Jiri Slaby6e94dbc2021-05-05 11:19:05 +02001679 if (test_bit(LOWWAIT, &p->statusflags) && !tty->flow.stopped &&
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001680 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
Alan Coxa808ac02009-11-30 13:18:02 +00001681 clear_bit(LOWWAIT, &p->statusflags);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001682 tty_wakeup(tty);
1683 }
1684
Peter Hurley97ef38b2016-04-09 17:11:36 -07001685 if (inited && !tty_throttled(tty) &&
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001686 MoxaPortRxQueue(p) > 0) { /* RX */
1687 MoxaPortReadData(p);
Jiri Slaby5f6a8512021-11-22 12:16:46 +01001688 tty_flip_buffer_push(&p->port);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001689 }
1690 } else {
Alan Coxa808ac02009-11-30 13:18:02 +00001691 clear_bit(EMPTYWAIT, &p->statusflags);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001692 MoxaPortFlushData(p, 0); /* flush RX */
1693 }
1694
1695 if (!handle) /* nothing else to do */
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001696 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001697
1698 intr = readw(ip); /* port irq status */
1699 if (intr == 0)
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001700 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001701
1702 writew(0, ip); /* ACK port */
1703 ofsAddr = p->tableAddr;
1704 if (intr & IntrTx) /* disable tx intr */
1705 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1706 ofsAddr + HostStat);
1707
1708 if (!inited)
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001709 goto put;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001710
1711 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
Jiri Slaby92a19f92013-01-03 15:53:03 +01001712 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
Jiri Slaby5f6a8512021-11-22 12:16:46 +01001713 tty_flip_buffer_push(&p->port);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001714 }
1715
1716 if (intr & IntrLine)
1717 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
Jiri Slaby0e0fd7d2009-04-06 17:34:04 +01001718put:
1719 tty_kref_put(tty);
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001720
1721 return 0;
1722}
1723
Kees Cook24ed9602017-08-28 11:28:21 -07001724static void moxa_poll(struct timer_list *unused)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725{
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001726 struct moxa_board_conf *brd;
1727 u16 __iomem *ip;
Jiri Slaby2a541342008-04-30 00:53:45 -07001728 unsigned int card, port, served = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001730 spin_lock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 for (card = 0; card < MAX_BOARDS; card++) {
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001732 brd = &moxa_boards[card];
1733 if (!brd->ready)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 continue;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001735
Jiri Slaby2a541342008-04-30 00:53:45 -07001736 served++;
1737
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001738 ip = NULL;
1739 if (readb(brd->intPend) == 0xff)
1740 ip = brd->intTable + readb(brd->intNdx);
1741
1742 for (port = 0; port < brd->numPorts; port++)
1743 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1744
1745 if (ip)
1746 writeb(0, brd->intPend); /* ACK */
1747
1748 if (moxaLowWaterChk) {
1749 struct moxa_port *p = brd->ports;
1750 for (port = 0; port < brd->numPorts; port++, p++)
1751 if (p->lowChkFlag) {
1752 p->lowChkFlag = 0;
1753 moxa_low_water_check(p->tableAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 }
1756 }
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07001757 moxaLowWaterChk = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Jiri Slaby2a541342008-04-30 00:53:45 -07001759 if (served)
1760 mod_timer(&moxaTimer, jiffies + HZ / 50);
1761 spin_unlock(&moxa_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762}
1763
1764/******************************************************************************/
1765
Ilpo Järvinena8c11c12022-08-16 14:57:39 +03001766static void moxa_set_tty_param(struct tty_struct *tty,
1767 const struct ktermios *old_termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768{
Alan Coxadc8d742012-07-14 15:31:47 +01001769 register struct ktermios *ts = &tty->termios;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001770 struct moxa_port *ch = tty->driver_data;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001771 int rts, cts, txflow, rxflow, xany, baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 rts = cts = txflow = rxflow = xany = 0;
1774 if (ts->c_cflag & CRTSCTS)
1775 rts = cts = 1;
1776 if (ts->c_iflag & IXON)
1777 txflow = 1;
1778 if (ts->c_iflag & IXOFF)
1779 rxflow = 1;
1780 if (ts->c_iflag & IXANY)
1781 xany = 1;
Alan Coxdb1acaa2008-02-08 04:18:43 -08001782
Jiri Slabyb4173f42008-04-30 00:53:40 -07001783 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1784 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
Alan Coxdb1acaa2008-02-08 04:18:43 -08001785 if (baud == -1)
1786 baud = tty_termios_baud_rate(old_termios);
1787 /* Not put the baud rate into the termios data */
1788 tty_encode_baud_rate(tty, baud, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789}
1790
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791/*****************************************************************************
1792 * Driver level functions: *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794
Jiri Slabyb4173f42008-04-30 00:53:40 -07001795static void MoxaPortFlushData(struct moxa_port *port, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796{
1797 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07001798 if (mode < 0 || mode > 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 return;
Jiri Slabyb4173f42008-04-30 00:53:40 -07001800 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 moxafunc(ofsAddr, FC_FlushQueue, mode);
1802 if (mode != 1) {
Jiri Slabyb4173f42008-04-30 00:53:40 -07001803 port->lowChkFlag = 0;
Jiri Slaby6f56b6582007-10-18 03:06:24 -07001804 moxa_low_water_check(ofsAddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 }
1806}
1807
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808/*
1809 * Moxa Port Number Description:
1810 *
1811 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1812 * the port number using in MOXA driver functions will be 0 to 31 for
1813 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1814 * to 127 for fourth. For example, if you setup three MOXA boards,
1815 * first board is C218, second board is C320-16 and third board is
1816 * C320-32. The port number of first board (C218 - 8 ports) is from
1817 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1818 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1819 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1820 * 127 will be invalid.
1821 *
1822 *
1823 * Moxa Functions Description:
1824 *
1825 * Function 1: Driver initialization routine, this routine must be
1826 * called when initialized driver.
1827 * Syntax:
1828 * void MoxaDriverInit();
1829 *
1830 *
1831 * Function 2: Moxa driver private IOCTL command processing.
1832 * Syntax:
1833 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1834 *
1835 * unsigned int cmd : IOCTL command
1836 * unsigned long arg : IOCTL argument
1837 * int port : port number (0 - 127)
1838 *
1839 * return: 0 (OK)
1840 * -EINVAL
1841 * -ENOIOCTLCMD
1842 *
1843 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 * Function 6: Enable this port to start Tx/Rx data.
1845 * Syntax:
1846 * void MoxaPortEnable(int port);
1847 * int port : port number (0 - 127)
1848 *
1849 *
1850 * Function 7: Disable this port
1851 * Syntax:
1852 * void MoxaPortDisable(int port);
1853 * int port : port number (0 - 127)
1854 *
1855 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 * Function 10: Setting baud rate of this port.
1857 * Syntax:
Jiri Slaby08d01c72008-04-30 00:53:47 -07001858 * speed_t MoxaPortSetBaud(int port, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859 * int port : port number (0 - 127)
1860 * long baud : baud rate (50 - 115200)
1861 *
1862 * return: 0 : this port is invalid or baud < 50
1863 * 50 - 115200 : the real baud rate set to the port, if
1864 * the argument baud is large than maximun
1865 * available baud rate, the real setting
1866 * baud rate will be the maximun baud rate.
1867 *
1868 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 * Function 12: Configure the port.
1870 * Syntax:
Alan Cox606d0992006-12-08 02:38:45 -08001871 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872 * int port : port number (0 - 127)
Alan Cox606d0992006-12-08 02:38:45 -08001873 * struct ktermios * termio : termio structure pointer
Alan Coxc7bce302006-09-30 23:27:24 -07001874 * speed_t baud : baud rate
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 *
1876 * return: -1 : this port is invalid or termio == NULL
1877 * 0 : setting O.K.
1878 *
1879 *
1880 * Function 13: Get the DTR/RTS state of this port.
1881 * Syntax:
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001882 * int MoxaPortGetLineOut(int port, bool *dtrState, bool *rtsState);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 * int port : port number (0 - 127)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001884 * bool * dtr_active : pointer to bool to receive the current DTR
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885 * state. (if NULL, this function will not
1886 * write to this address)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001887 * bool * rts_active : pointer to bool to receive the current RTS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 * state. (if NULL, this function will not
1889 * write to this address)
1890 *
1891 * return: -1 : this port is invalid
1892 * 0 : O.K.
1893 *
1894 *
1895 * Function 14: Setting the DTR/RTS output state of this port.
1896 * Syntax:
Ilpo Järvinen5d420392023-01-17 11:03:53 +02001897 * void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 * int port : port number (0 - 127)
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02001899 * bool dtr_active : DTR output state
1900 * bool rts_active : RTS output state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 *
1902 *
1903 * Function 15: Setting the flow control of this port.
1904 * Syntax:
1905 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1906 * int txFlow,int xany);
1907 * int port : port number (0 - 127)
1908 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1909 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1910 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1911 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1912 * int xany : S/W XANY flow control (0: no, 1: yes)
1913 *
1914 *
1915 * Function 16: Get ths line status of this port
1916 * Syntax:
1917 * int MoxaPortLineStatus(int port);
1918 * int port : port number (0 - 127)
1919 *
1920 * return: Bit 0 - CTS state (0: off, 1: on)
1921 * Bit 1 - DSR state (0: off, 1: on)
1922 * Bit 2 - DCD state (0: off, 1: on)
1923 *
1924 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 * Function 19: Flush the Rx/Tx buffer data of this port.
1926 * Syntax:
1927 * void MoxaPortFlushData(int port, int mode);
1928 * int port : port number (0 - 127)
1929 * int mode
1930 * 0 : flush the Rx buffer
1931 * 1 : flush the Tx buffer
1932 * 2 : flush the Rx and Tx buffer
1933 *
1934 *
1935 * Function 20: Write data.
1936 * Syntax:
1937 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1938 * int port : port number (0 - 127)
1939 * unsigned char * buffer : pointer to write data buffer.
1940 * int length : write data length
1941 *
1942 * return: 0 - length : real write data length
1943 *
1944 *
1945 * Function 21: Read data.
1946 * Syntax:
Alan Cox33f0f882006-01-09 20:54:13 -08001947 * int MoxaPortReadData(int port, struct tty_struct *tty);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948 * int port : port number (0 - 127)
Alan Cox33f0f882006-01-09 20:54:13 -08001949 * struct tty_struct *tty : tty for data
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950 *
1951 * return: 0 - length : real read data length
1952 *
1953 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954 * Function 24: Get the Tx buffer current queued data bytes
1955 * Syntax:
1956 * int MoxaPortTxQueue(int port);
1957 * int port : port number (0 - 127)
1958 *
1959 * return: .. : Tx buffer current queued data bytes
1960 *
1961 *
1962 * Function 25: Get the Tx buffer current free space
1963 * Syntax:
1964 * int MoxaPortTxFree(int port);
1965 * int port : port number (0 - 127)
1966 *
1967 * return: .. : Tx buffer current free space
1968 *
1969 *
1970 * Function 26: Get the Rx buffer current queued data bytes
1971 * Syntax:
1972 * int MoxaPortRxQueue(int port);
1973 * int port : port number (0 - 127)
1974 *
1975 * return: .. : Rx buffer current queued data bytes
1976 *
1977 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 * Function 28: Disable port data transmission.
1979 * Syntax:
1980 * void MoxaPortTxDisable(int port);
1981 * int port : port number (0 - 127)
1982 *
1983 *
1984 * Function 29: Enable port data transmission.
1985 * Syntax:
1986 * void MoxaPortTxEnable(int port);
1987 * int port : port number (0 - 127)
1988 *
1989 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 * Function 31: Get the received BREAK signal count and reset it.
1991 * Syntax:
1992 * int MoxaPortResetBrkCnt(int port);
1993 * int port : port number (0 - 127)
1994 *
1995 * return: 0 - .. : BREAK signal count
1996 *
1997 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
Jiri Slabyb4173f42008-04-30 00:53:40 -07002000static void MoxaPortEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002001{
2002 void __iomem *ofsAddr;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002003 u16 lowwater = 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004
Jiri Slabyb4173f42008-04-30 00:53:40 -07002005 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 writew(lowwater, ofsAddr + Low_water);
Jiri Slaby08d01c72008-04-30 00:53:47 -07002007 if (MOXA_IS_320(port->board))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002009 else
2010 writew(readw(ofsAddr + HostStat) | WakeupBreak,
2011 ofsAddr + HostStat);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012
2013 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
2014 moxafunc(ofsAddr, FC_FlushQueue, 2);
2015
2016 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
2017 MoxaPortLineStatus(port);
2018}
2019
Jiri Slabyb4173f42008-04-30 00:53:40 -07002020static void MoxaPortDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002022 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023
2024 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
2025 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
2026 writew(0, ofsAddr + HostStat);
2027 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
2028}
2029
Jiri Slaby08d01c72008-04-30 00:53:47 -07002030static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031{
Jiri Slaby08d01c72008-04-30 00:53:47 -07002032 void __iomem *ofsAddr = port->tableAddr;
2033 unsigned int clock, val;
2034 speed_t max;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002035
Jiri Slaby08d01c72008-04-30 00:53:47 -07002036 max = MOXA_IS_320(port->board) ? 460800 : 921600;
2037 if (baud < 50)
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002038 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039 if (baud > max)
2040 baud = max;
Jiri Slaby08d01c72008-04-30 00:53:47 -07002041 clock = 921600;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 val = clock / baud;
2043 moxafunc(ofsAddr, FC_SetBaud, val);
2044 baud = clock / val;
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002045 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046}
2047
Jiri Slabyb4173f42008-04-30 00:53:40 -07002048static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
2049 speed_t baud)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050{
2051 void __iomem *ofsAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 tcflag_t mode = 0;
2053
Jiri Slabyb4173f42008-04-30 00:53:40 -07002054 ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055
2056 mode = termio->c_cflag & CSIZE;
2057 if (mode == CS5)
2058 mode = MX_CS5;
2059 else if (mode == CS6)
2060 mode = MX_CS6;
2061 else if (mode == CS7)
2062 mode = MX_CS7;
2063 else if (mode == CS8)
2064 mode = MX_CS8;
2065
2066 if (termio->c_cflag & CSTOPB) {
2067 if (mode == MX_CS5)
2068 mode |= MX_STOP15;
2069 else
2070 mode |= MX_STOP2;
2071 } else
2072 mode |= MX_STOP1;
2073
2074 if (termio->c_cflag & PARENB) {
Lars Kanisd8dcbdd2017-11-28 11:55:17 +01002075 if (termio->c_cflag & PARODD) {
2076 if (termio->c_cflag & CMSPAR)
2077 mode |= MX_PARMARK;
2078 else
2079 mode |= MX_PARODD;
2080 } else {
2081 if (termio->c_cflag & CMSPAR)
2082 mode |= MX_PARSPACE;
2083 else
2084 mode |= MX_PAREVEN;
2085 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 } else
2087 mode |= MX_PARNONE;
2088
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002089 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090
Jiri Slaby08d01c72008-04-30 00:53:47 -07002091 if (MOXA_IS_320(port->board) && baud >= 921600)
2092 return -1;
2093
Alan Coxdb1acaa2008-02-08 04:18:43 -08002094 baud = MoxaPortSetBaud(port, baud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095
2096 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
Alan Coxf5c5a362009-11-30 13:17:57 +00002097 spin_lock_irq(&moxafunc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2099 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2100 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
Jiri Slaby6f56b6582007-10-18 03:06:24 -07002101 moxa_wait_finish(ofsAddr);
Alan Coxa808ac02009-11-30 13:18:02 +00002102 spin_unlock_irq(&moxafunc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103
2104 }
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002105 return baud;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106}
2107
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02002108static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active,
2109 bool *rts_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110{
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02002111 if (dtr_active)
2112 *dtr_active = port->lineCtrl & DTR_ON;
2113 if (rts_active)
2114 *rts_active = port->lineCtrl & RTS_ON;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002115
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002116 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117}
2118
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02002119static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120{
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002121 u8 mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002122
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02002123 if (dtr_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 mode |= DTR_ON;
Ilpo Järvinen2d762da2023-01-17 11:03:58 +02002125 if (rts_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 mode |= RTS_ON;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002127 port->lineCtrl = mode;
2128 moxafunc(port->tableAddr, FC_LineControl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129}
2130
Jiri Slabyb4173f42008-04-30 00:53:40 -07002131static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
2132 int txflow, int rxflow, int txany)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002134 int mode = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 if (rts)
2137 mode |= RTS_FlowCtl;
2138 if (cts)
2139 mode |= CTS_FlowCtl;
2140 if (txflow)
2141 mode |= Tx_FlowCtl;
2142 if (rxflow)
2143 mode |= Rx_FlowCtl;
2144 if (txany)
2145 mode |= IXM_IXANY;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002146 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147}
2148
Jiri Slabyb4173f42008-04-30 00:53:40 -07002149static int MoxaPortLineStatus(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150{
2151 void __iomem *ofsAddr;
2152 int val;
2153
Jiri Slabyb4173f42008-04-30 00:53:40 -07002154 ofsAddr = port->tableAddr;
Alan Coxf5c5a362009-11-30 13:17:57 +00002155 if (MOXA_IS_320(port->board))
2156 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
2157 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 val = readw(ofsAddr + FlagStat) >> 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 val &= 0x0B;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002160 if (val & 8)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 val |= 4;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002162 moxa_new_dcdstate(port, val & 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 val &= 7;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002164 return val;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165}
2166
Alan Coxd450b5a2008-10-13 10:39:58 +01002167static int MoxaPortWriteData(struct tty_struct *tty,
Jiri Slaby2108eba2008-04-30 00:53:44 -07002168 const unsigned char *buffer, int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169{
Alan Coxd450b5a2008-10-13 10:39:58 +01002170 struct moxa_port *port = tty->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002172 unsigned int c, total;
2173 u16 head, tail, tx_mask, spage, epage;
2174 u16 pageno, pageofs, bufhead;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175
Jiri Slabyb4173f42008-04-30 00:53:40 -07002176 ofsAddr = port->tableAddr;
2177 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178 tx_mask = readw(ofsAddr + TX_mask);
2179 spage = readw(ofsAddr + Page_txb);
2180 epage = readw(ofsAddr + EndPage_txb);
2181 tail = readw(ofsAddr + TXwptr);
2182 head = readw(ofsAddr + TXrptr);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002183 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002184 if (c > len)
2185 c = len;
Alan Cox9de6a512008-07-16 21:56:02 +01002186 moxaLog.txcnt[port->port.tty->index] += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 total = c;
2188 if (spage == epage) {
2189 bufhead = readw(ofsAddr + Ofs_txb);
2190 writew(spage, baseAddr + Control_reg);
2191 while (c > 0) {
2192 if (head > tail)
2193 len = head - tail - 1;
2194 else
2195 len = tx_mask + 1 - tail;
2196 len = (c > len) ? len : c;
2197 ofs = baseAddr + DynPage_addr + bufhead + tail;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002198 memcpy_toio(ofs, buffer, len);
2199 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 tail = (tail + len) & tx_mask;
2201 c -= len;
2202 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002204 pageno = spage + (tail >> 13);
2205 pageofs = tail & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002206 while (c > 0) {
2207 len = Page_size - pageofs;
2208 if (len > c)
2209 len = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002210 writeb(pageno, baseAddr + Control_reg);
2211 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002212 memcpy_toio(ofs, buffer, len);
2213 buffer += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002214 if (++pageno == epage)
2215 pageno = spage;
2216 pageofs = 0;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002217 c -= len;
2218 }
2219 tail = (tail + total) & tx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002221 writew(tail, ofsAddr + TXwptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 writeb(1, ofsAddr + CD180TXirq); /* start to send */
Jiri Slaby2108eba2008-04-30 00:53:44 -07002223 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224}
2225
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002226static int MoxaPortReadData(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227{
Alan Cox9de6a512008-07-16 21:56:02 +01002228 struct tty_struct *tty = port->port.tty;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002229 unsigned char *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002230 void __iomem *baseAddr, *ofsAddr, *ofs;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002231 unsigned int count, len, total;
2232 u16 tail, rx_mask, spage, epage;
2233 u16 pageno, pageofs, bufhead, head;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Jiri Slabyb4173f42008-04-30 00:53:40 -07002235 ofsAddr = port->tableAddr;
2236 baseAddr = port->board->basemem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002237 head = readw(ofsAddr + RXrptr);
2238 tail = readw(ofsAddr + RXwptr);
2239 rx_mask = readw(ofsAddr + RX_mask);
2240 spage = readw(ofsAddr + Page_rxb);
2241 epage = readw(ofsAddr + EndPage_rxb);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002242 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243 if (count == 0)
Alan Cox33f0f882006-01-09 20:54:13 -08002244 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245
Alan Cox33f0f882006-01-09 20:54:13 -08002246 total = count;
Jiri Slaby7bcf97d2008-04-30 00:53:43 -07002247 moxaLog.rxcnt[tty->index] += total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248 if (spage == epage) {
2249 bufhead = readw(ofsAddr + Ofs_rxb);
2250 writew(spage, baseAddr + Control_reg);
2251 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 ofs = baseAddr + DynPage_addr + bufhead + head;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002253 len = (tail >= head) ? (tail - head) :
2254 (rx_mask + 1 - head);
Jiri Slaby2f693352013-01-03 15:53:02 +01002255 len = tty_prepare_flip_string(&port->port, &dst,
Jiri Slaby2108eba2008-04-30 00:53:44 -07002256 min(len, count));
2257 memcpy_fromio(dst, ofs, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258 head = (head + len) & rx_mask;
2259 count -= len;
2260 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002261 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262 pageno = spage + (head >> 13);
2263 pageofs = head & Page_mask;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002264 while (count > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 writew(pageno, baseAddr + Control_reg);
2266 ofs = baseAddr + DynPage_addr + pageofs;
Jiri Slaby2f693352013-01-03 15:53:02 +01002267 len = tty_prepare_flip_string(&port->port, &dst,
Jiri Slaby2108eba2008-04-30 00:53:44 -07002268 min(Page_size - pageofs, count));
2269 memcpy_fromio(dst, ofs, len);
2270
2271 count -= len;
2272 pageofs = (pageofs + len) & Page_mask;
2273 if (pageofs == 0 && ++pageno == epage)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 pageno = spage;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002275 }
2276 head = (head + total) & rx_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002278 writew(head, ofsAddr + RXrptr);
2279 if (readb(ofsAddr + FlagStat) & Xoff_state) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280 moxaLowWaterChk = 1;
Jiri Slabyb4173f42008-04-30 00:53:40 -07002281 port->lowChkFlag = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 }
Jiri Slaby2108eba2008-04-30 00:53:44 -07002283 return total;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284}
2285
2286
Jiri Slabyfff4ef12021-05-05 11:19:19 +02002287static unsigned int MoxaPortTxQueue(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002289 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002290 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 rptr = readw(ofsAddr + TXrptr);
2293 wptr = readw(ofsAddr + TXwptr);
2294 mask = readw(ofsAddr + TX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002295 return (wptr - rptr) & mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002296}
2297
Jiri Slaby03b3b1a2021-05-05 11:19:15 +02002298static unsigned int MoxaPortTxFree(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002300 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002301 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002302
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 rptr = readw(ofsAddr + TXrptr);
2304 wptr = readw(ofsAddr + TXwptr);
2305 mask = readw(ofsAddr + TX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002306 return mask - ((wptr - rptr) & mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307}
2308
Jiri Slabyb4173f42008-04-30 00:53:40 -07002309static int MoxaPortRxQueue(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002311 void __iomem *ofsAddr = port->tableAddr;
Jiri Slaby2108eba2008-04-30 00:53:44 -07002312 u16 rptr, wptr, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 rptr = readw(ofsAddr + RXrptr);
2315 wptr = readw(ofsAddr + RXwptr);
2316 mask = readw(ofsAddr + RX_mask);
Jiri Slaby2108eba2008-04-30 00:53:44 -07002317 return (wptr - rptr) & mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318}
2319
Jiri Slabyb4173f42008-04-30 00:53:40 -07002320static void MoxaPortTxDisable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002321{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002322 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323}
2324
Jiri Slabyb4173f42008-04-30 00:53:40 -07002325static void MoxaPortTxEnable(struct moxa_port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002327 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328}
2329
Al Viro1c729ab2018-09-11 22:01:00 -04002330static int moxa_get_serial_info(struct tty_struct *tty,
2331 struct serial_struct *ss)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332{
Al Viro1c729ab2018-09-11 22:01:00 -04002333 struct moxa_port *info = tty->driver_data;
2334
2335 if (tty->index == MAX_PORTS)
2336 return -EINVAL;
2337 if (!info)
2338 return -ENODEV;
2339 mutex_lock(&info->port.mutex);
Dan Carpenter322003b2021-08-25 10:24:05 +03002340 ss->type = info->type;
2341 ss->line = info->port.tty->index;
2342 ss->flags = info->port.flags;
2343 ss->baud_base = 921600;
Johan Hovold6e70b732021-04-07 12:23:28 +02002344 ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
Al Viro1c729ab2018-09-11 22:01:00 -04002345 mutex_unlock(&info->port.mutex);
2346 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347}
2348
2349
Al Viro1c729ab2018-09-11 22:01:00 -04002350static int moxa_set_serial_info(struct tty_struct *tty,
2351 struct serial_struct *ss)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352{
Al Viro1c729ab2018-09-11 22:01:00 -04002353 struct moxa_port *info = tty->driver_data;
Johan Hovolddc8c8432021-04-07 12:23:29 +02002354 unsigned int close_delay;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355
Al Viro1c729ab2018-09-11 22:01:00 -04002356 if (tty->index == MAX_PORTS)
2357 return -EINVAL;
2358 if (!info)
2359 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
Johan Hovolddc8c8432021-04-07 12:23:29 +02002361 close_delay = msecs_to_jiffies(ss->close_delay * 10);
2362
Al Viro1c729ab2018-09-11 22:01:00 -04002363 mutex_lock(&info->port.mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 if (!capable(CAP_SYS_ADMIN)) {
Johan Hovolddc8c8432021-04-07 12:23:29 +02002365 if (close_delay != info->port.close_delay ||
2366 ss->type != info->type ||
2367 ((ss->flags & ~ASYNC_USR_MASK) !=
Al Viro1c729ab2018-09-11 22:01:00 -04002368 (info->port.flags & ~ASYNC_USR_MASK))) {
2369 mutex_unlock(&info->port.mutex);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002370 return -EPERM;
Al Viro1c729ab2018-09-11 22:01:00 -04002371 }
Johan Hovolddc8c8432021-04-07 12:23:29 +02002372 } else {
2373 info->port.close_delay = close_delay;
2374
2375 MoxaSetFifo(info, ss->type == PORT_16550A);
2376
2377 info->type = ss->type;
Al Viro1c729ab2018-09-11 22:01:00 -04002378 }
Al Viro1c729ab2018-09-11 22:01:00 -04002379 mutex_unlock(&info->port.mutex);
Jiri Slabyeaa95a82008-04-30 00:53:46 -07002380 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381}
2382
2383
2384
2385/*****************************************************************************
2386 * Static local functions: *
2387 *****************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388
Jiri Slabyb4173f42008-04-30 00:53:40 -07002389static void MoxaSetFifo(struct moxa_port *port, int enable)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390{
Jiri Slabyb4173f42008-04-30 00:53:40 -07002391 void __iomem *ofsAddr = port->tableAddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392
2393 if (!enable) {
2394 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2395 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2396 } else {
2397 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2398 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2399 }
2400}