1 // SPDX-License-Identifier: GPL-2.0+
2 /*****************************************************************************/
4 * moxa.c -- MOXA Intellio family multiport serial driver.
6 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
7 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
14 * MOXA Intellio Series Driver
20 #include <linux/module.h>
21 #include <linux/types.h>
23 #include <linux/ioport.h>
24 #include <linux/errno.h>
25 #include <linux/firmware.h>
26 #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>
42 #include <linux/slab.h>
43 #include <linux/ratelimit.h>
46 #include <linux/uaccess.h>
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)
57 * System Configuration
60 #define Magic_code 0x404
63 * for C218 BIOS initialization
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 */
77 #define C218_LoadBuf 0x0F00
78 #define C218_KeyCode 0x218
79 #define CP204J_KeyCode 0x204
82 * for C320 BIOS initialization
84 #define C320_ConfBase 0x800
85 #define C320_LoadBuf 0x0f00
86 #define STS_init 0x05 /* for C320_status */
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 */
97 #define C320_KeyCode 0x320
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
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
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
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
155 #define RxFIFOTrig1 0
156 #define RxFIFOTrig4 1
157 #define RxFIFOTrig8 2
158 #define RxFIFOTrig14 3
163 #define DRAM_global 0
164 #define INT_data (DRAM_global + 0)
165 #define Config_base (DRAM_global + 0x108)
167 #define IRQindex (INT_data + 0)
168 #define IRQpending (INT_data + 4)
169 #define IRQtable (INT_data + 8)
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
180 #define IntrIntr 0x20 /* received INTR code */
181 #define IntrQuit 0x40 /* received QUIT code */
182 #define IntrEOF 0x80 /* received EOF code */
184 #define IntrRxTrigger 0x100 /* rx data count reach trigger value */
185 #define IntrTxTrigger 0x200 /* tx data count below trigger value */
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)
199 * DATA BUFFER in DRAM
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 */
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
232 #define Low_water 0x36
234 #define FuncCode 0x40
236 #define FuncArg1 0x44
238 #define C218rx_size 0x2000 /* 8K bytes */
239 #define C218tx_size 0x8000 /* 32K bytes */
241 #define C218rx_mask (C218rx_size - 1)
242 #define C218tx_mask (C218tx_size - 1)
244 #define C320p8rx_size 0x2000
245 #define C320p8tx_size 0x8000
246 #define C320p8rx_mask (C320p8rx_size - 1)
247 #define C320p8tx_mask (C320p8tx_size - 1)
249 #define C320p16rx_size 0x2000
250 #define C320p16tx_size 0x4000
251 #define C320p16rx_mask (C320p16rx_size - 1)
252 #define C320p16tx_mask (C320p16tx_size - 1)
254 #define C320p24rx_size 0x2000
255 #define C320p24tx_size 0x2000
256 #define C320p24rx_mask (C320p24rx_size - 1)
257 #define C320p24tx_mask (C320p24tx_size - 1)
259 #define C320p32rx_size 0x1000
260 #define C320p32tx_size 0x1000
261 #define C320p32rx_mask (C320p32rx_size - 1)
262 #define C320p32tx_mask (C320p32tx_size - 1)
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
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
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
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
290 #define C320p32rx_spage 3
291 #define C320p32tx_ofs C320p32rx_size
292 #define C320p32tx_spage 3
293 #define C320p32buf_pgno 1
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
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
320 #define CTS_FlowCtl 1
321 #define RTS_FlowCtl 2
324 #define IXM_IXANY 0x10
334 /* mode definition */
340 #define MX_STOP1 0x00
341 #define MX_STOP15 0x04
342 #define MX_STOP2 0x08
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
350 #define MOXA_VERSION "6.0k"
352 #define MOXA_FW_HDRLEN 32
354 #define MOXAMAJOR 172
356 #define MAX_BOARDS 4 /* Don't change this value */
357 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
358 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
360 #define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
361 (brd)->boardType == MOXA_BOARD_C320_PCI)
364 * Define the Moxa PCI vendor and device IDs.
366 #define MOXA_BUS_TYPE_ISA 0
367 #define MOXA_BUS_TYPE_PCI 1
370 MOXA_BOARD_C218_PCI = 1,
377 static char *moxa_brdname[] =
379 "C218 Turbo PCI series",
380 "C218 Turbo ISA series",
381 "C320 Turbo PCI series",
382 "C320 Turbo ISA series",
387 static const struct pci_device_id moxa_pcibrds[] = {
388 { 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 },
396 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
397 #endif /* CONFIG_PCI */
401 static struct moxa_board_conf {
408 struct moxa_port *ports;
410 void __iomem *basemem;
411 void __iomem *intNdx;
412 void __iomem *intPend;
413 void __iomem *intTable;
414 } moxa_boards[MAX_BOARDS];
416 struct mxser_mstatus {
430 struct tty_port port;
431 struct moxa_board_conf *board;
432 void __iomem *tableAddr;
436 unsigned long statusflags;
438 u8 DCDState; /* Protected by the port lock */
445 int rxcnt[MAX_PORTS];
446 int txcnt[MAX_PORTS];
455 #define WAKEUP_CHARS 256
457 static int ttymajor = MOXAMAJOR;
458 static struct mon_str moxaLog;
459 static unsigned int moxaFuncTout = HZ / 2;
460 static unsigned int moxaLowWaterChk;
461 static DEFINE_MUTEX(moxa_openlock);
462 static DEFINE_SPINLOCK(moxa_lock);
464 static unsigned long baseaddr[MAX_BOARDS];
465 static unsigned int type[MAX_BOARDS];
466 static unsigned int numports[MAX_BOARDS];
467 static struct tty_port moxa_service_port;
469 MODULE_AUTHOR("William Chen");
470 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
471 MODULE_LICENSE("GPL");
474 module_param_array(type, uint, NULL, 0);
475 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
476 module_param_hw_array(baseaddr, ulong, ioport, NULL, 0);
477 MODULE_PARM_DESC(baseaddr, "base address");
478 module_param_array(numports, uint, NULL, 0);
479 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
481 module_param(ttymajor, int, 0);
486 static int moxa_open(struct tty_struct *, struct file *);
487 static void moxa_close(struct tty_struct *, struct file *);
488 static ssize_t moxa_write(struct tty_struct *, const u8 *, size_t);
489 static unsigned int moxa_write_room(struct tty_struct *);
490 static void moxa_flush_buffer(struct tty_struct *);
491 static unsigned int moxa_chars_in_buffer(struct tty_struct *);
492 static void moxa_set_termios(struct tty_struct *, const struct ktermios *);
493 static void moxa_stop(struct tty_struct *);
494 static void moxa_start(struct tty_struct *);
495 static void moxa_hangup(struct tty_struct *);
496 static int moxa_tiocmget(struct tty_struct *tty);
497 static int moxa_tiocmset(struct tty_struct *tty,
498 unsigned int set, unsigned int clear);
499 static void moxa_poll(struct timer_list *);
500 static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *);
501 static void moxa_shutdown(struct tty_port *);
502 static bool moxa_carrier_raised(struct tty_port *);
503 static void moxa_dtr_rts(struct tty_port *, bool);
505 * moxa board interface functions:
507 static void MoxaPortEnable(struct moxa_port *);
508 static void MoxaPortDisable(struct moxa_port *);
509 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
510 static int MoxaPortGetLineOut(struct moxa_port *, bool *, bool *);
511 static void MoxaPortLineCtrl(struct moxa_port *, bool, bool);
512 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
513 static int MoxaPortLineStatus(struct moxa_port *);
514 static void MoxaPortFlushData(struct moxa_port *, int);
515 static ssize_t MoxaPortWriteData(struct tty_struct *, const u8 *, size_t);
516 static int MoxaPortReadData(struct moxa_port *);
517 static unsigned int MoxaPortTxQueue(struct moxa_port *);
518 static int MoxaPortRxQueue(struct moxa_port *);
519 static unsigned int MoxaPortTxFree(struct moxa_port *);
520 static void MoxaPortTxDisable(struct moxa_port *);
521 static void MoxaPortTxEnable(struct moxa_port *);
522 static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *);
523 static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *);
524 static void MoxaSetFifo(struct moxa_port *port, int enable);
530 static DEFINE_SPINLOCK(moxafunc_lock);
532 static void moxa_wait_finish(void __iomem *ofsAddr)
534 unsigned long end = jiffies + moxaFuncTout;
536 while (readw(ofsAddr + FuncCode) != 0)
537 if (time_after(jiffies, end))
539 if (readw(ofsAddr + FuncCode) != 0)
540 printk_ratelimited(KERN_WARNING "moxa function expired\n");
543 static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
546 spin_lock_irqsave(&moxafunc_lock, flags);
547 writew(arg, ofsAddr + FuncArg);
548 writew(cmd, ofsAddr + FuncCode);
549 moxa_wait_finish(ofsAddr);
550 spin_unlock_irqrestore(&moxafunc_lock, flags);
553 static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
557 spin_lock_irqsave(&moxafunc_lock, flags);
558 writew(arg, ofsAddr + FuncArg);
559 writew(cmd, ofsAddr + FuncCode);
560 moxa_wait_finish(ofsAddr);
561 ret = readw(ofsAddr + FuncArg);
562 spin_unlock_irqrestore(&moxafunc_lock, flags);
566 static void moxa_low_water_check(void __iomem *ofsAddr)
568 u16 rptr, wptr, mask, len;
570 if (readb(ofsAddr + FlagStat) & Xoff_state) {
571 rptr = readw(ofsAddr + RXrptr);
572 wptr = readw(ofsAddr + RXwptr);
573 mask = readw(ofsAddr + RX_mask);
574 len = (wptr - rptr) & mask;
575 if (len <= Low_water)
576 moxafunc(ofsAddr, FC_SendXon, 0);
584 static int moxa_ioctl(struct tty_struct *tty,
585 unsigned int cmd, unsigned long arg)
587 struct moxa_port *ch = tty->driver_data;
588 void __user *argp = (void __user *)arg;
591 if (tty->index == MAX_PORTS) {
592 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
593 cmd != MOXA_GETMSTATUS)
599 case MOXA_GETDATACOUNT:
600 moxaLog.tick = jiffies;
601 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
604 case MOXA_FLUSH_QUEUE:
605 MoxaPortFlushData(ch, arg);
607 case MOXA_GET_IOQUEUE: {
608 struct moxaq_str __user *argm = argp;
609 struct moxaq_str tmp;
613 for (i = 0; i < MAX_BOARDS; i++) {
614 p = moxa_boards[i].ports;
615 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
616 memset(&tmp, 0, sizeof(tmp));
617 spin_lock_bh(&moxa_lock);
618 if (moxa_boards[i].ready) {
619 tmp.inq = MoxaPortRxQueue(p);
620 tmp.outq = MoxaPortTxQueue(p);
622 spin_unlock_bh(&moxa_lock);
623 if (copy_to_user(argm, &tmp, sizeof(tmp)))
628 } case MOXA_GET_OQUEUE:
629 status = MoxaPortTxQueue(ch);
630 ret = put_user(status, (unsigned long __user *)argp);
632 case MOXA_GET_IQUEUE:
633 status = MoxaPortRxQueue(ch);
634 ret = put_user(status, (unsigned long __user *)argp);
636 case MOXA_GETMSTATUS: {
637 struct mxser_mstatus __user *argm = argp;
638 struct mxser_mstatus tmp;
642 for (i = 0; i < MAX_BOARDS; i++) {
643 p = moxa_boards[i].ports;
644 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
645 struct tty_struct *ttyp;
646 memset(&tmp, 0, sizeof(tmp));
647 spin_lock_bh(&moxa_lock);
648 if (!moxa_boards[i].ready) {
649 spin_unlock_bh(&moxa_lock);
653 status = MoxaPortLineStatus(p);
654 spin_unlock_bh(&moxa_lock);
663 ttyp = tty_port_tty_get(&p->port);
665 tmp.cflag = p->cflag;
667 tmp.cflag = ttyp->termios.c_cflag;
670 if (copy_to_user(argm, &tmp, sizeof(tmp)))
682 static int moxa_break_ctl(struct tty_struct *tty, int state)
684 struct moxa_port *port = tty->driver_data;
686 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
691 static const struct tty_operations moxa_ops = {
695 .write_room = moxa_write_room,
696 .flush_buffer = moxa_flush_buffer,
697 .chars_in_buffer = moxa_chars_in_buffer,
699 .set_termios = moxa_set_termios,
702 .hangup = moxa_hangup,
703 .break_ctl = moxa_break_ctl,
704 .tiocmget = moxa_tiocmget,
705 .tiocmset = moxa_tiocmset,
706 .set_serial = moxa_set_serial_info,
707 .get_serial = moxa_get_serial_info,
710 static const struct tty_port_operations moxa_port_ops = {
711 .carrier_raised = moxa_carrier_raised,
712 .dtr_rts = moxa_dtr_rts,
713 .shutdown = moxa_shutdown,
716 static struct tty_driver *moxaDriver;
717 static DEFINE_TIMER(moxaTimer, moxa_poll);
723 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
725 switch (brd->boardType) {
726 case MOXA_BOARD_C218_ISA:
727 case MOXA_BOARD_C218_PCI:
731 case MOXA_BOARD_CP204J:
745 static int moxa_check_fw(const void *ptr)
747 const __le16 *lptr = ptr;
749 if (*lptr != cpu_to_le16(0x7980))
755 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
758 void __iomem *baseAddr = brd->basemem;
761 writeb(HW_reset, baseAddr + Control_reg); /* reset */
763 memset_io(baseAddr, 0, 4096);
764 memcpy_toio(baseAddr, buf, len); /* download BIOS */
765 writeb(0, baseAddr + Control_reg); /* restart */
769 switch (brd->boardType) {
770 case MOXA_BOARD_C218_ISA:
771 case MOXA_BOARD_C218_PCI:
772 tmp = readw(baseAddr + C218_key);
773 if (tmp != C218_KeyCode)
776 case MOXA_BOARD_CP204J:
777 tmp = readw(baseAddr + C218_key);
778 if (tmp != CP204J_KeyCode)
782 tmp = readw(baseAddr + C320_key);
783 if (tmp != C320_KeyCode)
785 tmp = readw(baseAddr + C320_status);
786 if (tmp != STS_init) {
787 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
788 "module not found\n");
796 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
800 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
803 void __iomem *baseAddr = brd->basemem;
806 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
810 writew(len - 7168 - 2, baseAddr + C320bapi_len);
811 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
812 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
813 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
814 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
819 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
822 void __iomem *baseAddr = brd->basemem;
823 const __le16 *uptr = ptr;
824 size_t wlen, len2, j;
825 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
826 unsigned int i, retry;
829 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
832 switch (brd->boardType) {
833 case MOXA_BOARD_CP204J:
834 case MOXA_BOARD_C218_ISA:
835 case MOXA_BOARD_C218_PCI:
837 loadbuf = C218_LoadBuf;
838 loadlen = C218DLoad_len;
839 checksum = C218check_sum;
840 checksum_ok = C218chksum_ok;
844 keycode = C320_KeyCode;
845 loadbuf = C320_LoadBuf;
846 loadlen = C320DLoad_len;
847 checksum = C320check_sum;
848 checksum_ok = C320chksum_ok;
854 for (i = 0; i < wlen; i++)
855 usum += le16_to_cpu(uptr[i]);
861 len2 = (wlen > 2048) ? 2048 : wlen;
863 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
866 writew(len2, baseAddr + loadlen);
867 writew(0, baseAddr + key);
868 for (i = 0; i < 100; i++) {
869 if (readw(baseAddr + key) == keycode)
873 if (readw(baseAddr + key) != keycode)
876 writew(0, baseAddr + loadlen);
877 writew(usum, baseAddr + checksum);
878 writew(0, baseAddr + key);
879 for (i = 0; i < 100; i++) {
880 if (readw(baseAddr + key) == keycode)
885 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
886 if (readb(baseAddr + checksum_ok) != 1)
889 writew(0, baseAddr + key);
890 for (i = 0; i < 600; i++) {
891 if (readw(baseAddr + Magic_no) == Magic_code)
895 if (readw(baseAddr + Magic_no) != Magic_code)
898 if (MOXA_IS_320(brd)) {
899 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
900 writew(0x3800, baseAddr + TMS320_PORT1);
901 writew(0x3900, baseAddr + TMS320_PORT2);
902 writew(28499, baseAddr + TMS320_CLOCK);
904 writew(0x3200, baseAddr + TMS320_PORT1);
905 writew(0x3400, baseAddr + TMS320_PORT2);
906 writew(19999, baseAddr + TMS320_CLOCK);
909 writew(1, baseAddr + Disable_IRQ);
910 writew(0, baseAddr + Magic_no);
911 for (i = 0; i < 500; i++) {
912 if (readw(baseAddr + Magic_no) == Magic_code)
916 if (readw(baseAddr + Magic_no) != Magic_code)
919 if (MOXA_IS_320(brd)) {
920 j = readw(baseAddr + Module_cnt);
923 brd->numPorts = j * 8;
924 writew(j, baseAddr + Module_no);
925 writew(0, baseAddr + Magic_no);
926 for (i = 0; i < 600; i++) {
927 if (readw(baseAddr + Magic_no) == Magic_code)
931 if (readw(baseAddr + Magic_no) != Magic_code)
934 brd->intNdx = baseAddr + IRQindex;
935 brd->intPend = baseAddr + IRQpending;
936 brd->intTable = baseAddr + IRQtable;
941 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
944 void __iomem *ofsAddr, *baseAddr = brd->basemem;
945 struct moxa_port *port;
949 printk(KERN_ERR "MOXA: bios length is not even\n");
953 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
957 switch (brd->boardType) {
958 case MOXA_BOARD_C218_ISA:
959 case MOXA_BOARD_C218_PCI:
960 case MOXA_BOARD_CP204J:
962 for (i = 0; i < brd->numPorts; i++, port++) {
965 port->tableAddr = baseAddr + Extern_table +
967 ofsAddr = port->tableAddr;
968 writew(C218rx_mask, ofsAddr + RX_mask);
969 writew(C218tx_mask, ofsAddr + TX_mask);
970 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
971 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
973 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
974 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
980 for (i = 0; i < brd->numPorts; i++, port++) {
983 port->tableAddr = baseAddr + Extern_table +
985 ofsAddr = port->tableAddr;
986 switch (brd->numPorts) {
988 writew(C320p8rx_mask, ofsAddr + RX_mask);
989 writew(C320p8tx_mask, ofsAddr + TX_mask);
990 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
991 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
992 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
993 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
997 writew(C320p16rx_mask, ofsAddr + RX_mask);
998 writew(C320p16tx_mask, ofsAddr + TX_mask);
999 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
1000 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
1001 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
1002 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
1006 writew(C320p24rx_mask, ofsAddr + RX_mask);
1007 writew(C320p24tx_mask, ofsAddr + TX_mask);
1008 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
1009 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
1010 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
1011 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
1014 writew(C320p32rx_mask, ofsAddr + RX_mask);
1015 writew(C320p32tx_mask, ofsAddr + TX_mask);
1016 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
1017 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
1018 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
1019 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
1020 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
1029 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
1031 const void *ptr = fw->data;
1035 unsigned int a, lenp, lencnt;
1038 __le32 magic; /* 0x34303430 */
1040 u8 type; /* UNIX = 3 */
1041 u8 model; /* C218T=1, C320T=2, CP204=3 */
1046 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
1048 if (fw->size < MOXA_FW_HDRLEN) {
1049 strcpy(rsn, "too short (even header won't fit)");
1052 if (hdr->magic != cpu_to_le32(0x30343034)) {
1053 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
1056 if (hdr->type != 3) {
1057 sprintf(rsn, "not for linux, type is %u", hdr->type);
1060 if (moxa_check_fw_model(brd, hdr->model)) {
1061 sprintf(rsn, "not for this card, model is %u", hdr->model);
1065 len = MOXA_FW_HDRLEN;
1066 lencnt = hdr->model == 2 ? 5 : 3;
1067 for (a = 0; a < ARRAY_SIZE(lens); a++) {
1068 lens[a] = le16_to_cpu(hdr->len[a]);
1069 if (lens[a] && len + lens[a] <= fw->size &&
1070 moxa_check_fw(&fw->data[len]))
1071 printk(KERN_WARNING "MOXA firmware: unexpected input "
1072 "at offset %u, but going on\n", (u32)len);
1073 if (!lens[a] && a < lencnt) {
1074 sprintf(rsn, "too few entries in fw file");
1080 if (len != fw->size) {
1081 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
1086 ptr += MOXA_FW_HDRLEN;
1087 lenp = 0; /* bios */
1089 strcpy(rsn, "read above");
1091 ret = moxa_load_bios(brd, ptr, lens[lenp]);
1095 /* we skip the tty section (lens[1]), since we don't need it */
1096 ptr += lens[lenp] + lens[lenp + 1];
1097 lenp += 2; /* comm */
1099 if (hdr->model == 2) {
1100 ret = moxa_load_320b(brd, ptr, lens[lenp]);
1103 /* skip another tty */
1104 ptr += lens[lenp] + lens[lenp + 1];
1108 ret = moxa_load_code(brd, ptr, lens[lenp]);
1114 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
1118 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
1120 const struct firmware *fw;
1122 struct moxa_port *p;
1123 unsigned int i, first_idx;
1126 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
1128 if (brd->ports == NULL) {
1129 printk(KERN_ERR "cannot allocate memory for ports\n");
1134 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
1135 tty_port_init(&p->port);
1136 p->port.ops = &moxa_port_ops;
1137 p->type = PORT_16550A;
1138 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1141 switch (brd->boardType) {
1142 case MOXA_BOARD_C218_ISA:
1143 case MOXA_BOARD_C218_PCI:
1144 file = "/*(DEBLOBBED)*/";
1146 case MOXA_BOARD_CP204J:
1147 file = "/*(DEBLOBBED)*/";
1150 file = "/*(DEBLOBBED)*/";
1154 ret = reject_firmware(&fw, file, dev);
1156 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
1157 "you've placed '%s' file into your firmware "
1158 "loader directory (e.g. /lib/firmware)\n",
1163 ret = moxa_load_fw(brd, fw);
1165 release_firmware(fw);
1170 spin_lock_bh(&moxa_lock);
1172 if (!timer_pending(&moxaTimer))
1173 mod_timer(&moxaTimer, jiffies + HZ / 50);
1174 spin_unlock_bh(&moxa_lock);
1176 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
1177 for (i = 0; i < brd->numPorts; i++)
1178 tty_port_register_device(&brd->ports[i].port, moxaDriver,
1179 first_idx + i, dev);
1183 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
1184 tty_port_destroy(&brd->ports[i].port);
1190 static void moxa_board_deinit(struct moxa_board_conf *brd)
1192 unsigned int a, opened, first_idx;
1194 mutex_lock(&moxa_openlock);
1195 spin_lock_bh(&moxa_lock);
1197 spin_unlock_bh(&moxa_lock);
1199 /* pci hot-un-plug support */
1200 for (a = 0; a < brd->numPorts; a++)
1201 if (tty_port_initialized(&brd->ports[a].port))
1202 tty_port_tty_hangup(&brd->ports[a].port, false);
1204 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
1205 tty_port_destroy(&brd->ports[a].port);
1209 for (a = 0; a < brd->numPorts; a++)
1210 if (tty_port_initialized(&brd->ports[a].port))
1212 mutex_unlock(&moxa_openlock);
1216 mutex_lock(&moxa_openlock);
1219 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
1220 for (a = 0; a < brd->numPorts; a++)
1221 tty_unregister_device(moxaDriver, first_idx + a);
1223 iounmap(brd->basemem);
1224 brd->basemem = NULL;
1229 static int moxa_pci_probe(struct pci_dev *pdev,
1230 const struct pci_device_id *ent)
1232 struct moxa_board_conf *board;
1234 int board_type = ent->driver_data;
1237 retval = pci_enable_device(pdev);
1239 dev_err(&pdev->dev, "can't enable pci device\n");
1243 for (i = 0; i < MAX_BOARDS; i++)
1244 if (moxa_boards[i].basemem == NULL)
1248 if (i >= MAX_BOARDS) {
1249 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
1250 "found. Board is ignored.\n", MAX_BOARDS);
1254 board = &moxa_boards[i];
1256 retval = pci_request_region(pdev, 2, "moxa-base");
1258 dev_err(&pdev->dev, "can't request pci region 2\n");
1262 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
1263 if (board->basemem == NULL) {
1264 dev_err(&pdev->dev, "can't remap io space 2\n");
1269 board->boardType = board_type;
1270 switch (board_type) {
1271 case MOXA_BOARD_C218_ISA:
1272 case MOXA_BOARD_C218_PCI:
1273 board->numPorts = 8;
1276 case MOXA_BOARD_CP204J:
1277 board->numPorts = 4;
1280 board->numPorts = 0;
1283 board->busType = MOXA_BUS_TYPE_PCI;
1285 retval = moxa_init_board(board, &pdev->dev);
1289 pci_set_drvdata(pdev, board);
1291 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1292 moxa_brdname[board_type - 1], board->numPorts);
1296 iounmap(board->basemem);
1297 board->basemem = NULL;
1299 pci_release_region(pdev, 2);
1304 static void moxa_pci_remove(struct pci_dev *pdev)
1306 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1308 moxa_board_deinit(brd);
1310 pci_release_region(pdev, 2);
1313 static struct pci_driver moxa_pci_driver = {
1315 .id_table = moxa_pcibrds,
1316 .probe = moxa_pci_probe,
1317 .remove = moxa_pci_remove
1319 #endif /* CONFIG_PCI */
1321 static int __init moxa_init(void)
1323 unsigned int isabrds = 0;
1325 struct moxa_board_conf *brd = moxa_boards;
1328 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1331 tty_port_init(&moxa_service_port);
1333 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1334 TTY_DRIVER_REAL_RAW |
1335 TTY_DRIVER_DYNAMIC_DEV);
1336 if (IS_ERR(moxaDriver))
1337 return PTR_ERR(moxaDriver);
1339 moxaDriver->name = "ttyMX";
1340 moxaDriver->major = ttymajor;
1341 moxaDriver->minor_start = 0;
1342 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1343 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1344 moxaDriver->init_termios = tty_std_termios;
1345 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1346 moxaDriver->init_termios.c_ispeed = 9600;
1347 moxaDriver->init_termios.c_ospeed = 9600;
1348 tty_set_operations(moxaDriver, &moxa_ops);
1349 /* Having one more port only for ioctls is ugly */
1350 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1352 if (tty_register_driver(moxaDriver)) {
1353 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1354 tty_driver_kref_put(moxaDriver);
1358 /* Find the boards defined from module args. */
1360 for (i = 0; i < MAX_BOARDS; i++) {
1363 if (type[i] == MOXA_BOARD_C218_ISA ||
1364 type[i] == MOXA_BOARD_C320_ISA) {
1365 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1366 isabrds + 1, moxa_brdname[type[i] - 1],
1368 brd->boardType = type[i];
1369 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1371 brd->busType = MOXA_BUS_TYPE_ISA;
1372 brd->basemem = ioremap(baseaddr[i], 0x4000);
1373 if (!brd->basemem) {
1374 printk(KERN_ERR "MOXA: can't remap %lx\n",
1378 if (moxa_init_board(brd, NULL)) {
1379 iounmap(brd->basemem);
1380 brd->basemem = NULL;
1384 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
1385 "ready (%u ports, firmware loaded)\n",
1386 baseaddr[i], brd->numPorts);
1394 retval = pci_register_driver(&moxa_pci_driver);
1396 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1405 static void __exit moxa_exit(void)
1410 pci_unregister_driver(&moxa_pci_driver);
1413 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1414 if (moxa_boards[i].ready)
1415 moxa_board_deinit(&moxa_boards[i]);
1417 del_timer_sync(&moxaTimer);
1419 tty_unregister_driver(moxaDriver);
1420 tty_driver_kref_put(moxaDriver);
1423 module_init(moxa_init);
1424 module_exit(moxa_exit);
1426 static void moxa_shutdown(struct tty_port *port)
1428 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1429 MoxaPortDisable(ch);
1430 MoxaPortFlushData(ch, 2);
1433 static bool moxa_carrier_raised(struct tty_port *port)
1435 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1438 spin_lock_irq(&port->lock);
1440 spin_unlock_irq(&port->lock);
1444 static void moxa_dtr_rts(struct tty_port *port, bool active)
1446 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1447 MoxaPortLineCtrl(ch, active, active);
1451 static int moxa_open(struct tty_struct *tty, struct file *filp)
1453 struct moxa_board_conf *brd;
1454 struct moxa_port *ch;
1458 if (port == MAX_PORTS) {
1459 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1461 if (mutex_lock_interruptible(&moxa_openlock))
1462 return -ERESTARTSYS;
1463 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1465 mutex_unlock(&moxa_openlock);
1469 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1470 mutex_unlock(&moxa_openlock);
1474 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1476 tty->driver_data = ch;
1477 tty_port_tty_set(&ch->port, tty);
1478 mutex_lock(&ch->port.mutex);
1479 if (!tty_port_initialized(&ch->port)) {
1480 ch->statusflags = 0;
1481 moxa_set_tty_param(tty, &tty->termios);
1482 MoxaPortLineCtrl(ch, true, true);
1484 MoxaSetFifo(ch, ch->type == PORT_16550A);
1485 tty_port_set_initialized(&ch->port, true);
1487 mutex_unlock(&ch->port.mutex);
1488 mutex_unlock(&moxa_openlock);
1490 return tty_port_block_til_ready(&ch->port, tty, filp);
1493 static void moxa_close(struct tty_struct *tty, struct file *filp)
1495 struct moxa_port *ch = tty->driver_data;
1496 ch->cflag = tty->termios.c_cflag;
1497 tty_port_close(&ch->port, tty, filp);
1500 static ssize_t moxa_write(struct tty_struct *tty, const u8 *buf, size_t count)
1502 struct moxa_port *ch = tty->driver_data;
1503 unsigned long flags;
1509 spin_lock_irqsave(&moxa_lock, flags);
1510 len = MoxaPortWriteData(tty, buf, count);
1511 spin_unlock_irqrestore(&moxa_lock, flags);
1513 set_bit(LOWWAIT, &ch->statusflags);
1517 static unsigned int moxa_write_room(struct tty_struct *tty)
1519 struct moxa_port *ch;
1521 if (tty->flow.stopped)
1523 ch = tty->driver_data;
1526 return MoxaPortTxFree(ch);
1529 static void moxa_flush_buffer(struct tty_struct *tty)
1531 struct moxa_port *ch = tty->driver_data;
1535 MoxaPortFlushData(ch, 1);
1539 static unsigned int moxa_chars_in_buffer(struct tty_struct *tty)
1541 struct moxa_port *ch = tty->driver_data;
1544 chars = MoxaPortTxQueue(ch);
1547 * Make it possible to wakeup anything waiting for output
1548 * in tty_ioctl.c, etc.
1550 set_bit(EMPTYWAIT, &ch->statusflags);
1554 static int moxa_tiocmget(struct tty_struct *tty)
1556 struct moxa_port *ch = tty->driver_data;
1557 bool dtr_active, rts_active;
1561 MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
1566 status = MoxaPortLineStatus(ch);
1576 static int moxa_tiocmset(struct tty_struct *tty,
1577 unsigned int set, unsigned int clear)
1579 bool dtr_active, rts_active;
1580 struct moxa_port *ch;
1582 mutex_lock(&moxa_openlock);
1583 ch = tty->driver_data;
1585 mutex_unlock(&moxa_openlock);
1589 MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
1590 if (set & TIOCM_RTS)
1592 if (set & TIOCM_DTR)
1594 if (clear & TIOCM_RTS)
1596 if (clear & TIOCM_DTR)
1598 MoxaPortLineCtrl(ch, dtr_active, rts_active);
1599 mutex_unlock(&moxa_openlock);
1603 static void moxa_set_termios(struct tty_struct *tty,
1604 const struct ktermios *old_termios)
1606 struct moxa_port *ch = tty->driver_data;
1610 moxa_set_tty_param(tty, old_termios);
1611 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1612 wake_up_interruptible(&ch->port.open_wait);
1615 static void moxa_stop(struct tty_struct *tty)
1617 struct moxa_port *ch = tty->driver_data;
1621 MoxaPortTxDisable(ch);
1622 set_bit(TXSTOPPED, &ch->statusflags);
1626 static void moxa_start(struct tty_struct *tty)
1628 struct moxa_port *ch = tty->driver_data;
1633 if (!test_bit(TXSTOPPED, &ch->statusflags))
1636 MoxaPortTxEnable(ch);
1637 clear_bit(TXSTOPPED, &ch->statusflags);
1640 static void moxa_hangup(struct tty_struct *tty)
1642 struct moxa_port *ch = tty->driver_data;
1643 tty_port_hangup(&ch->port);
1646 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1648 unsigned long flags;
1651 spin_lock_irqsave(&p->port.lock, flags);
1652 if (dcd != p->DCDState) {
1654 spin_unlock_irqrestore(&p->port.lock, flags);
1656 tty_port_tty_hangup(&p->port, true);
1659 spin_unlock_irqrestore(&p->port.lock, flags);
1662 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1665 struct tty_struct *tty = tty_port_tty_get(&p->port);
1666 bool inited = tty_port_initialized(&p->port);
1667 void __iomem *ofsAddr;
1671 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1672 MoxaPortTxQueue(p) == 0) {
1673 clear_bit(EMPTYWAIT, &p->statusflags);
1676 if (test_bit(LOWWAIT, &p->statusflags) && !tty->flow.stopped &&
1677 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1678 clear_bit(LOWWAIT, &p->statusflags);
1682 if (inited && !tty_throttled(tty) &&
1683 MoxaPortRxQueue(p) > 0) { /* RX */
1684 MoxaPortReadData(p);
1685 tty_flip_buffer_push(&p->port);
1688 clear_bit(EMPTYWAIT, &p->statusflags);
1689 MoxaPortFlushData(p, 0); /* flush RX */
1692 if (!handle) /* nothing else to do */
1695 intr = readw(ip); /* port irq status */
1699 writew(0, ip); /* ACK port */
1700 ofsAddr = p->tableAddr;
1701 if (intr & IntrTx) /* disable tx intr */
1702 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1703 ofsAddr + HostStat);
1708 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1709 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
1710 tty_flip_buffer_push(&p->port);
1713 if (intr & IntrLine)
1714 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1721 static void moxa_poll(struct timer_list *unused)
1723 struct moxa_board_conf *brd;
1725 unsigned int card, port, served = 0;
1727 spin_lock(&moxa_lock);
1728 for (card = 0; card < MAX_BOARDS; card++) {
1729 brd = &moxa_boards[card];
1736 if (readb(brd->intPend) == 0xff)
1737 ip = brd->intTable + readb(brd->intNdx);
1739 for (port = 0; port < brd->numPorts; port++)
1740 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1743 writeb(0, brd->intPend); /* ACK */
1745 if (moxaLowWaterChk) {
1746 struct moxa_port *p = brd->ports;
1747 for (port = 0; port < brd->numPorts; port++, p++)
1748 if (p->lowChkFlag) {
1750 moxa_low_water_check(p->tableAddr);
1754 moxaLowWaterChk = 0;
1757 mod_timer(&moxaTimer, jiffies + HZ / 50);
1758 spin_unlock(&moxa_lock);
1761 /******************************************************************************/
1763 static void moxa_set_tty_param(struct tty_struct *tty,
1764 const struct ktermios *old_termios)
1766 register struct ktermios *ts = &tty->termios;
1767 struct moxa_port *ch = tty->driver_data;
1768 int rts, cts, txflow, rxflow, xany, baud;
1770 rts = cts = txflow = rxflow = xany = 0;
1771 if (ts->c_cflag & CRTSCTS)
1773 if (ts->c_iflag & IXON)
1775 if (ts->c_iflag & IXOFF)
1777 if (ts->c_iflag & IXANY)
1780 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1781 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1783 baud = tty_termios_baud_rate(old_termios);
1784 /* Not put the baud rate into the termios data */
1785 tty_encode_baud_rate(tty, baud, baud);
1788 /*****************************************************************************
1789 * Driver level functions: *
1790 *****************************************************************************/
1792 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1794 void __iomem *ofsAddr;
1795 if (mode < 0 || mode > 2)
1797 ofsAddr = port->tableAddr;
1798 moxafunc(ofsAddr, FC_FlushQueue, mode);
1800 port->lowChkFlag = 0;
1801 moxa_low_water_check(ofsAddr);
1806 * Moxa Port Number Description:
1808 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1809 * the port number using in MOXA driver functions will be 0 to 31 for
1810 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1811 * to 127 for fourth. For example, if you setup three MOXA boards,
1812 * first board is C218, second board is C320-16 and third board is
1813 * C320-32. The port number of first board (C218 - 8 ports) is from
1814 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1815 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1816 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1817 * 127 will be invalid.
1820 * Moxa Functions Description:
1822 * Function 1: Driver initialization routine, this routine must be
1823 * called when initialized driver.
1825 * void MoxaDriverInit();
1828 * Function 2: Moxa driver private IOCTL command processing.
1830 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1832 * unsigned int cmd : IOCTL command
1833 * unsigned long arg : IOCTL argument
1834 * int port : port number (0 - 127)
1841 * Function 6: Enable this port to start Tx/Rx data.
1843 * void MoxaPortEnable(int port);
1844 * int port : port number (0 - 127)
1847 * Function 7: Disable this port
1849 * void MoxaPortDisable(int port);
1850 * int port : port number (0 - 127)
1853 * Function 10: Setting baud rate of this port.
1855 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1856 * int port : port number (0 - 127)
1857 * long baud : baud rate (50 - 115200)
1859 * return: 0 : this port is invalid or baud < 50
1860 * 50 - 115200 : the real baud rate set to the port, if
1861 * the argument baud is large than maximun
1862 * available baud rate, the real setting
1863 * baud rate will be the maximun baud rate.
1866 * Function 12: Configure the port.
1868 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1869 * int port : port number (0 - 127)
1870 * struct ktermios * termio : termio structure pointer
1871 * speed_t baud : baud rate
1873 * return: -1 : this port is invalid or termio == NULL
1877 * Function 13: Get the DTR/RTS state of this port.
1879 * int MoxaPortGetLineOut(int port, bool *dtrState, bool *rtsState);
1880 * int port : port number (0 - 127)
1881 * bool * dtr_active : pointer to bool to receive the current DTR
1882 * state. (if NULL, this function will not
1883 * write to this address)
1884 * bool * rts_active : pointer to bool to receive the current RTS
1885 * state. (if NULL, this function will not
1886 * write to this address)
1888 * return: -1 : this port is invalid
1892 * Function 14: Setting the DTR/RTS output state of this port.
1894 * void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState);
1895 * int port : port number (0 - 127)
1896 * bool dtr_active : DTR output state
1897 * bool rts_active : RTS output state
1900 * Function 15: Setting the flow control of this port.
1902 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1903 * int txFlow,int xany);
1904 * int port : port number (0 - 127)
1905 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1906 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1907 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1908 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1909 * int xany : S/W XANY flow control (0: no, 1: yes)
1912 * Function 16: Get ths line status of this port
1914 * int MoxaPortLineStatus(int port);
1915 * int port : port number (0 - 127)
1917 * return: Bit 0 - CTS state (0: off, 1: on)
1918 * Bit 1 - DSR state (0: off, 1: on)
1919 * Bit 2 - DCD state (0: off, 1: on)
1922 * Function 19: Flush the Rx/Tx buffer data of this port.
1924 * void MoxaPortFlushData(int port, int mode);
1925 * int port : port number (0 - 127)
1927 * 0 : flush the Rx buffer
1928 * 1 : flush the Tx buffer
1929 * 2 : flush the Rx and Tx buffer
1932 * Function 20: Write data.
1934 * ssize_t MoxaPortWriteData(int port, u8 *buffer, size_t length);
1935 * int port : port number (0 - 127)
1936 * u8 *buffer : pointer to write data buffer.
1937 * size_t length : write data length
1939 * return: 0 - length : real write data length
1942 * Function 21: Read data.
1944 * int MoxaPortReadData(int port, struct tty_struct *tty);
1945 * int port : port number (0 - 127)
1946 * struct tty_struct *tty : tty for data
1948 * return: 0 - length : real read data length
1951 * Function 24: Get the Tx buffer current queued data bytes
1953 * int MoxaPortTxQueue(int port);
1954 * int port : port number (0 - 127)
1956 * return: .. : Tx buffer current queued data bytes
1959 * Function 25: Get the Tx buffer current free space
1961 * int MoxaPortTxFree(int port);
1962 * int port : port number (0 - 127)
1964 * return: .. : Tx buffer current free space
1967 * Function 26: Get the Rx buffer current queued data bytes
1969 * int MoxaPortRxQueue(int port);
1970 * int port : port number (0 - 127)
1972 * return: .. : Rx buffer current queued data bytes
1975 * Function 28: Disable port data transmission.
1977 * void MoxaPortTxDisable(int port);
1978 * int port : port number (0 - 127)
1981 * Function 29: Enable port data transmission.
1983 * void MoxaPortTxEnable(int port);
1984 * int port : port number (0 - 127)
1987 * Function 31: Get the received BREAK signal count and reset it.
1989 * int MoxaPortResetBrkCnt(int port);
1990 * int port : port number (0 - 127)
1992 * return: 0 - .. : BREAK signal count
1997 static void MoxaPortEnable(struct moxa_port *port)
1999 void __iomem *ofsAddr;
2002 ofsAddr = port->tableAddr;
2003 writew(lowwater, ofsAddr + Low_water);
2004 if (MOXA_IS_320(port->board))
2005 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
2007 writew(readw(ofsAddr + HostStat) | WakeupBreak,
2008 ofsAddr + HostStat);
2010 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
2011 moxafunc(ofsAddr, FC_FlushQueue, 2);
2013 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
2014 MoxaPortLineStatus(port);
2017 static void MoxaPortDisable(struct moxa_port *port)
2019 void __iomem *ofsAddr = port->tableAddr;
2021 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
2022 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
2023 writew(0, ofsAddr + HostStat);
2024 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
2027 static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
2029 void __iomem *ofsAddr = port->tableAddr;
2030 unsigned int clock, val;
2033 max = MOXA_IS_320(port->board) ? 460800 : 921600;
2040 moxafunc(ofsAddr, FC_SetBaud, val);
2045 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
2048 void __iomem *ofsAddr;
2051 ofsAddr = port->tableAddr;
2053 mode = termio->c_cflag & CSIZE;
2056 else if (mode == CS6)
2058 else if (mode == CS7)
2060 else if (mode == CS8)
2063 if (termio->c_cflag & CSTOPB) {
2071 if (termio->c_cflag & PARENB) {
2072 if (termio->c_cflag & PARODD) {
2073 if (termio->c_cflag & CMSPAR)
2078 if (termio->c_cflag & CMSPAR)
2079 mode |= MX_PARSPACE;
2086 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
2088 if (MOXA_IS_320(port->board) && baud >= 921600)
2091 baud = MoxaPortSetBaud(port, baud);
2093 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
2094 spin_lock_irq(&moxafunc_lock);
2095 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2096 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2097 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
2098 moxa_wait_finish(ofsAddr);
2099 spin_unlock_irq(&moxafunc_lock);
2105 static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active,
2109 *dtr_active = port->lineCtrl & DTR_ON;
2111 *rts_active = port->lineCtrl & RTS_ON;
2116 static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active)
2124 port->lineCtrl = mode;
2125 moxafunc(port->tableAddr, FC_LineControl, mode);
2128 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
2129 int txflow, int rxflow, int txany)
2134 mode |= RTS_FlowCtl;
2136 mode |= CTS_FlowCtl;
2143 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
2146 static int MoxaPortLineStatus(struct moxa_port *port)
2148 void __iomem *ofsAddr;
2151 ofsAddr = port->tableAddr;
2152 if (MOXA_IS_320(port->board))
2153 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
2155 val = readw(ofsAddr + FlagStat) >> 4;
2159 moxa_new_dcdstate(port, val & 8);
2164 static ssize_t MoxaPortWriteData(struct tty_struct *tty, const u8 *buffer,
2167 struct moxa_port *port = tty->driver_data;
2168 void __iomem *baseAddr, *ofsAddr, *ofs;
2170 u16 head, tail, tx_mask, spage, epage;
2171 u16 pageno, pageofs, bufhead;
2173 ofsAddr = port->tableAddr;
2174 baseAddr = port->board->basemem;
2175 tx_mask = readw(ofsAddr + TX_mask);
2176 spage = readw(ofsAddr + Page_txb);
2177 epage = readw(ofsAddr + EndPage_txb);
2178 tail = readw(ofsAddr + TXwptr);
2179 head = readw(ofsAddr + TXrptr);
2180 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
2183 moxaLog.txcnt[port->port.tty->index] += c;
2185 if (spage == epage) {
2186 bufhead = readw(ofsAddr + Ofs_txb);
2187 writew(spage, baseAddr + Control_reg);
2190 len = head - tail - 1;
2192 len = tx_mask + 1 - tail;
2193 len = (c > len) ? len : c;
2194 ofs = baseAddr + DynPage_addr + bufhead + tail;
2195 memcpy_toio(ofs, buffer, len);
2197 tail = (tail + len) & tx_mask;
2201 pageno = spage + (tail >> 13);
2202 pageofs = tail & Page_mask;
2204 len = Page_size - pageofs;
2207 writeb(pageno, baseAddr + Control_reg);
2208 ofs = baseAddr + DynPage_addr + pageofs;
2209 memcpy_toio(ofs, buffer, len);
2211 if (++pageno == epage)
2216 tail = (tail + total) & tx_mask;
2218 writew(tail, ofsAddr + TXwptr);
2219 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2223 static int MoxaPortReadData(struct moxa_port *port)
2225 struct tty_struct *tty = port->port.tty;
2226 void __iomem *baseAddr, *ofsAddr, *ofs;
2228 unsigned int count, len, total;
2229 u16 tail, rx_mask, spage, epage;
2230 u16 pageno, pageofs, bufhead, head;
2232 ofsAddr = port->tableAddr;
2233 baseAddr = port->board->basemem;
2234 head = readw(ofsAddr + RXrptr);
2235 tail = readw(ofsAddr + RXwptr);
2236 rx_mask = readw(ofsAddr + RX_mask);
2237 spage = readw(ofsAddr + Page_rxb);
2238 epage = readw(ofsAddr + EndPage_rxb);
2239 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
2244 moxaLog.rxcnt[tty->index] += total;
2245 if (spage == epage) {
2246 bufhead = readw(ofsAddr + Ofs_rxb);
2247 writew(spage, baseAddr + Control_reg);
2249 ofs = baseAddr + DynPage_addr + bufhead + head;
2250 len = (tail >= head) ? (tail - head) :
2251 (rx_mask + 1 - head);
2252 len = tty_prepare_flip_string(&port->port, &dst,
2254 memcpy_fromio(dst, ofs, len);
2255 head = (head + len) & rx_mask;
2259 pageno = spage + (head >> 13);
2260 pageofs = head & Page_mask;
2262 writew(pageno, baseAddr + Control_reg);
2263 ofs = baseAddr + DynPage_addr + pageofs;
2264 len = tty_prepare_flip_string(&port->port, &dst,
2265 min(Page_size - pageofs, count));
2266 memcpy_fromio(dst, ofs, len);
2269 pageofs = (pageofs + len) & Page_mask;
2270 if (pageofs == 0 && ++pageno == epage)
2273 head = (head + total) & rx_mask;
2275 writew(head, ofsAddr + RXrptr);
2276 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2277 moxaLowWaterChk = 1;
2278 port->lowChkFlag = 1;
2284 static unsigned int MoxaPortTxQueue(struct moxa_port *port)
2286 void __iomem *ofsAddr = port->tableAddr;
2287 u16 rptr, wptr, mask;
2289 rptr = readw(ofsAddr + TXrptr);
2290 wptr = readw(ofsAddr + TXwptr);
2291 mask = readw(ofsAddr + TX_mask);
2292 return (wptr - rptr) & mask;
2295 static unsigned int MoxaPortTxFree(struct moxa_port *port)
2297 void __iomem *ofsAddr = port->tableAddr;
2298 u16 rptr, wptr, mask;
2300 rptr = readw(ofsAddr + TXrptr);
2301 wptr = readw(ofsAddr + TXwptr);
2302 mask = readw(ofsAddr + TX_mask);
2303 return mask - ((wptr - rptr) & mask);
2306 static int MoxaPortRxQueue(struct moxa_port *port)
2308 void __iomem *ofsAddr = port->tableAddr;
2309 u16 rptr, wptr, mask;
2311 rptr = readw(ofsAddr + RXrptr);
2312 wptr = readw(ofsAddr + RXwptr);
2313 mask = readw(ofsAddr + RX_mask);
2314 return (wptr - rptr) & mask;
2317 static void MoxaPortTxDisable(struct moxa_port *port)
2319 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2322 static void MoxaPortTxEnable(struct moxa_port *port)
2324 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2327 static int moxa_get_serial_info(struct tty_struct *tty,
2328 struct serial_struct *ss)
2330 struct moxa_port *info = tty->driver_data;
2332 if (tty->index == MAX_PORTS)
2336 mutex_lock(&info->port.mutex);
2337 ss->type = info->type;
2338 ss->line = info->port.tty->index;
2339 ss->flags = info->port.flags;
2340 ss->baud_base = 921600;
2341 ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10;
2342 mutex_unlock(&info->port.mutex);
2347 static int moxa_set_serial_info(struct tty_struct *tty,
2348 struct serial_struct *ss)
2350 struct moxa_port *info = tty->driver_data;
2351 unsigned int close_delay;
2353 if (tty->index == MAX_PORTS)
2358 close_delay = msecs_to_jiffies(ss->close_delay * 10);
2360 mutex_lock(&info->port.mutex);
2361 if (!capable(CAP_SYS_ADMIN)) {
2362 if (close_delay != info->port.close_delay ||
2363 ss->type != info->type ||
2364 ((ss->flags & ~ASYNC_USR_MASK) !=
2365 (info->port.flags & ~ASYNC_USR_MASK))) {
2366 mutex_unlock(&info->port.mutex);
2370 info->port.close_delay = close_delay;
2372 MoxaSetFifo(info, ss->type == PORT_16550A);
2374 info->type = ss->type;
2376 mutex_unlock(&info->port.mutex);
2382 /*****************************************************************************
2383 * Static local functions: *
2384 *****************************************************************************/
2386 static void MoxaSetFifo(struct moxa_port *port, int enable)
2388 void __iomem *ofsAddr = port->tableAddr;
2391 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2392 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2394 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2395 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);