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Merge tag 'sunxi-fixes-for-4.13-3' of https://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-artful-kernel.git] / drivers / tty / cyclades.c
CommitLineData
1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
1da177e4
LT		 6 * This file contains the driver for the Cyclades async multiport
7 * serial boards.
8 *
9 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
10 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
1da177e4 11 *
ebdb5135 12 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 13 *
14 * Much of the design and some of the code came from serial.c
15 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
16 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
17 * and then fixed as suggested by Michael K. Johnson 12/12/92.
c8e1693a 18 * Converted to pci probing and cleaned up by Jiri Slaby.
1da177e4 19 *
1da177e4
LT		 20 */
21
ebdb5135 22#define CY_VERSION "2.6"
096dcfce 23
1da177e4
LT		 24/* If you need to install more boards than NR_CARDS, change the constant
25 in the definition below. No other change is necessary to support up to
26 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
27
02f1175c 28#define NR_CARDS 4
1da177e4
LT		 29
30/*
31 If the total number of ports is larger than NR_PORTS, change this
32 constant in the definition below. No other change is necessary to
33 support more boards/ports. */
34
02f1175c 35#define NR_PORTS 256
1da177e4 36
1da177e4
LT		 37#define ZO_V1 0
38#define ZO_V2 1
39#define ZE_V1 2
40
41#define SERIAL_PARANOIA_CHECK
42#undef CY_DEBUG_OPEN
43#undef CY_DEBUG_THROTTLE
44#undef CY_DEBUG_OTHER
45#undef CY_DEBUG_IO
46#undef CY_DEBUG_COUNT
47#undef CY_DEBUG_DTR
1da177e4
LT		 48#undef CY_DEBUG_INTERRUPTS
49#undef CY_16Y_HACK
50#undef CY_ENABLE_MONITORING
51#undef CY_PCI_DEBUG
52
1da177e4 53/*
15ed6cc0 54 * Include section
1da177e4 55 */
1da177e4
LT		 56#include <linux/module.h>
57#include <linux/errno.h>
58#include <linux/signal.h>
59#include <linux/sched.h>
60#include <linux/timer.h>
61#include <linux/interrupt.h>
62#include <linux/tty.h>
33f0f88f 63#include <linux/tty_flip.h>
1da177e4
LT		 64#include <linux/serial.h>
65#include <linux/major.h>
66#include <linux/string.h>
67#include <linux/fcntl.h>
68#include <linux/ptrace.h>
69#include <linux/cyclades.h>
70#include <linux/mm.h>
71#include <linux/ioport.h>
72#include <linux/init.h>
73#include <linux/delay.h>
74#include <linux/spinlock.h>
75#include <linux/bitops.h>
054f5b0a 76#include <linux/firmware.h>
9f56fad7 77#include <linux/device.h>
5a0e3ad6 78#include <linux/slab.h>
1da177e4 79
15ed6cc0 80#include <linux/io.h>
15ed6cc0 81#include <linux/uaccess.h>
1da177e4 82
1da177e4
LT		 83#include <linux/kernel.h>
84#include <linux/pci.h>
85
86#include <linux/stat.h>
87#include <linux/proc_fs.h>
444697d6 88#include <linux/seq_file.h>
1da177e4 89
02f1175c 90static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4 91
1da177e4
LT		 92#ifndef SERIAL_XMIT_SIZE
93#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
94#endif
1da177e4 95
054f5b0a
JS		 96/* firmware stuff */
97#define ZL_MAX_BLOCKS 16
98#define DRIVER_VERSION 0x02010203
99#define RAM_SIZE 0x80000
100
054f5b0a
JS		 101enum zblock_type {
102 ZBLOCK_PRG = 0,
103 ZBLOCK_FPGA = 1
104};
105
106struct zfile_header {
107 char name[64];
108 char date[32];
109 char aux[32];
110 u32 n_config;
111 u32 config_offset;
112 u32 n_blocks;
113 u32 block_offset;
114 u32 reserved[9];
115} __attribute__ ((packed));
116
117struct zfile_config {
118 char name[64];
119 u32 mailbox;
120 u32 function;
121 u32 n_blocks;
122 u32 block_list[ZL_MAX_BLOCKS];
123} __attribute__ ((packed));
124
125struct zfile_block {
126 u32 type;
127 u32 file_offset;
128 u32 ram_offset;
129 u32 size;
130} __attribute__ ((packed));
131
1da177e4
LT		 132static struct tty_driver *cy_serial_driver;
133
134#ifdef CONFIG_ISA
135/* This is the address lookup table. The driver will probe for
136 Cyclom-Y/ISA boards at all addresses in here. If you want the
137 driver to probe addresses at a different address, add it to
138 this table. If the driver is probing some other board and
139 causing problems, remove the offending address from this table.
1da177e4
LT		 140*/
141
142static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 143 0xD0000,
144 0xD2000,
145 0xD4000,
146 0xD6000,
147 0xD8000,
148 0xDA000,
149 0xDC000,
150 0xDE000,
151 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 152};
02f1175c 153
fe971071 154#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4 155
3046d50e
JS		 156static long maddr[NR_CARDS];
157static int irq[NR_CARDS];
1da177e4 158
3b60daf8
DH		 159module_param_hw_array(maddr, long, iomem, NULL, 0);
160module_param_hw_array(irq, int, irq, NULL, 0);
1da177e4 161
02f1175c 162#endif /* CONFIG_ISA */
1da177e4
LT		 163
164/* This is the per-card data structure containing address, irq, number of
165 channels, etc. This driver supports a maximum of NR_CARDS cards.
166*/
167static struct cyclades_card cy_card[NR_CARDS];
168
02f1175c 169static int cy_next_channel; /* next minor available */
1da177e4 170
1da177e4
LT		 171/*
172 * This is used to look up the divisor speeds and the timeouts
173 * We're normally limited to 15 distinct baud rates. The extra
77451e53 174 * are accessed via settings in info->port.flags.
1da177e4
LT		 175 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
176 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
177 * HI VHI
178 * 20
179 */
ebdb5135 180static const int baud_table[] = {
02f1175c
JS		 181 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
182 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
183 230400, 0
184};
185
ebdb5135 186static const char baud_co_25[] = { /* 25 MHz clock option table */
02f1175c
JS		 187 /* value => 00 01 02 03 04 */
188 /* divide by 8 32 128 512 2048 */
189 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
190 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
191};
192
ebdb5135 193static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
02f1175c
JS		 194 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
195 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
196};
197
ebdb5135 198static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
02f1175c
JS		 199 /* value => 00 01 02 03 04 */
200 /* divide by 8 32 128 512 2048 */
201 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
202 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
203 0x00
204};
205
ebdb5135 206static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
02f1175c
JS		 207 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
208 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
209 0x21
210};
211
ebdb5135 212static const char baud_cor3[] = { /* receive threshold */
02f1175c
JS		 213 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
214 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
215 0x07
216};
1da177e4
LT		 217
218/*
219 * The Cyclades driver implements HW flow control as any serial driver.
15ed6cc0
AC		 220 * The cyclades_port structure member rflow and the vector rflow_thr
221 * allows us to take advantage of a special feature in the CD1400 to avoid
222 * data loss even when the system interrupt latency is too high. These flags
223 * are to be used only with very special applications. Setting these flags
224 * requires the use of a special cable (DTR and RTS reversed). In the new
225 * CD1400-based boards (rev. 6.00 or later), there is no need for special
1da177e4
LT		 226 * cables.
227 */
228
ebdb5135 229static const char rflow_thr[] = { /* rflow threshold */
02f1175c
JS		 230 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
231 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
232 0x0a
233};
1da177e4
LT		 234
235/* The Cyclom-Ye has placed the sequential chips in non-sequential
236 * address order. This look-up table overcomes that problem.
237 */
f0eefdc3 238static const unsigned int cy_chip_offset[] = { 0x0000,
02f1175c
JS		 239 0x0400,
240 0x0800,
241 0x0C00,
242 0x0200,
243 0x0600,
244 0x0A00,
245 0x0E00
246};
1da177e4
LT		 247
248/* PCI related definitions */
249
1da177e4 250#ifdef CONFIG_PCI
ebdb5135 251static const struct pci_device_id cy_pci_dev_id[] = {
15ed6cc0
AC		 252 /* PCI < 1Mb */
253 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
254 /* PCI > 1Mb */
255 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
256 /* 4Y PCI < 1Mb */
257 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
258 /* 4Y PCI > 1Mb */
259 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
260 /* 8Y PCI < 1Mb */
261 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
262 /* 8Y PCI > 1Mb */
263 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
264 /* Z PCI < 1Mb */
265 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
266 /* Z PCI > 1Mb */
267 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
893de2df 268 { } /* end of table */
02f1175c 269};
893de2df 270MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 271#endif
272
273static void cy_start(struct tty_struct *);
d13549f8 274static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
1a86b5e3 275static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 276#ifdef CONFIG_ISA
277static unsigned detect_isa_irq(void __iomem *);
02f1175c 278#endif /* CONFIG_ISA */
1da177e4 279
1da177e4
LT		 280#ifndef CONFIG_CYZ_INTR
281static void cyz_poll(unsigned long);
282
283/* The Cyclades-Z polling cycle is defined by this variable */
284static long cyz_polling_cycle = CZ_DEF_POLL;
285
8d06afab 286static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 287
02f1175c 288#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 289static void cyz_rx_restart(unsigned long);
290static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 291#endif /* CONFIG_CYZ_INTR */
1da177e4 292
f25d596f 293static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
3aeea5b9
JS		 294{
295 struct cyclades_card *card = port->card;
296
297 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
298}
299
f88d8683 300static u8 cyy_readb(struct cyclades_port *port, u32 reg)
3aeea5b9
JS		 301{
302 struct cyclades_card *card = port->card;
303
304 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
305}
306
2693f485
JS		 307static inline bool cy_is_Z(struct cyclades_card *card)
308{
309 return card->num_chips == (unsigned int)-1;
310}
311
312static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
313{
314 return readl(&ctl_addr->init_ctrl) & (1 << 17);
315}
316
317static inline bool cyz_fpga_loaded(struct cyclades_card *card)
318{
319 return __cyz_fpga_loaded(card->ctl_addr.p9060);
320}
321
1c82363e 322static bool cyz_is_loaded(struct cyclades_card *card)
2693f485
JS		 323{
324 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
325
326 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
327 readl(&fw_id->signature) == ZFIRM_ID;
328}
329
8c6ba003 330static int serial_paranoia_check(struct cyclades_port *info,
ebdb5135 331 const char *name, const char *routine)
1da177e4
LT		 332{
333#ifdef SERIAL_PARANOIA_CHECK
02f1175c 334 if (!info) {
21719191
JS		 335 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
336 "in %s\n", name, routine);
02f1175c
JS		 337 return 1;
338 }
339
02f1175c 340 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 341 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
342 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 343 return 1;
344 }
1da177e4 345#endif
02f1175c 346 return 0;
ebdb5135 347}
1da177e4 348
1da177e4
LT		 349/***********************************************************/
350/********* Start of block of Cyclom-Y specific code ********/
351
352/* This routine waits up to 1000 micro-seconds for the previous
353 command to the Cirrus chip to complete and then issues the
354 new command. An error is returned if the previous command
355 didn't finish within the time limit.
356
357 This function is only called from inside spinlock-protected code.
358 */
3aeea5b9 359static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
1da177e4 360{
3aeea5b9 361 void __iomem *ccr = base_addr + (CyCCR << index);
ad39c300 362 unsigned int i;
1da177e4 363
02f1175c
JS		 364 /* Check to see that the previous command has completed */
365 for (i = 0; i < 100; i++) {
3aeea5b9 366 if (readb(ccr) == 0)
02f1175c 367 break;
02f1175c 368 udelay(10L);
1da177e4 369 }
02f1175c
JS		 370 /* if the CCR never cleared, the previous command
371 didn't finish within the "reasonable time" */
372 if (i == 100)
096dcfce 373 return -1;
1da177e4 374
02f1175c 375 /* Issue the new command */
3aeea5b9 376 cy_writeb(ccr, cmd);
1da177e4 377
096dcfce 378 return 0;
3aeea5b9
JS		 379}
380
381static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
382{
383 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
384 port->card->bus_index);
385}
1da177e4
LT		 386
387#ifdef CONFIG_ISA
388/* ISA interrupt detection code */
15ed6cc0 389static unsigned detect_isa_irq(void __iomem *address)
1da177e4 390{
02f1175c
JS		 391 int irq;
392 unsigned long irqs, flags;
393 int save_xir, save_car;
394 int index = 0; /* IRQ probing is only for ISA */
395
396 /* forget possible initially masked and pending IRQ */
397 irq = probe_irq_off(probe_irq_on());
398
399 /* Clear interrupts on the board first */
400 cy_writeb(address + (Cy_ClrIntr << index), 0);
401 /* Cy_ClrIntr is 0x1800 */
402
403 irqs = probe_irq_on();
404 /* Wait ... */
f6e208c1 405 msleep(5);
02f1175c
JS		 406
407 /* Enable the Tx interrupts on the CD1400 */
408 local_irq_save(flags);
409 cy_writeb(address + (CyCAR << index), 0);
3aeea5b9 410 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
02f1175c
JS		 411
412 cy_writeb(address + (CyCAR << index), 0);
413 cy_writeb(address + (CySRER << index),
db05c3b1 414 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 415 local_irq_restore(flags);
416
417 /* Wait ... */
f6e208c1 418 msleep(5);
02f1175c
JS		 419
420 /* Check which interrupt is in use */
421 irq = probe_irq_off(irqs);
422
423 /* Clean up */
db05c3b1
JS		 424 save_xir = (u_char) readb(address + (CyTIR << index));
425 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 426 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
427 cy_writeb(address + (CySRER << index),
db05c3b1 428 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 429 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
430 cy_writeb(address + (CyCAR << index), (save_car));
431 cy_writeb(address + (Cy_ClrIntr << index), 0);
432 /* Cy_ClrIntr is 0x1800 */
433
434 return (irq > 0) ? irq : 0;
1da177e4 435}
02f1175c 436#endif /* CONFIG_ISA */
1da177e4 437
ce97a097
JS		 438static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
439 void __iomem *base_addr)
e941027f
JS		 440{
441 struct cyclades_port *info;
227434f8 442 struct tty_port *port;
65f76a82 443 int len, index = cinfo->bus_index;
3aeea5b9 444 u8 ivr, save_xir, channel, save_car, data, char_count;
e941027f 445
e941027f 446#ifdef CY_DEBUG_INTERRUPTS
ce97a097 447 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 448#endif
ce97a097 449 /* determine the channel & change to that context */
65f76a82
JS		 450 save_xir = readb(base_addr + (CyRIR << index));
451 channel = save_xir & CyIRChannel;
ce97a097 452 info = &cinfo->ports[channel + chip * 4];
227434f8 453 port = &info->port;
3aeea5b9
JS		 454 save_car = cyy_readb(info, CyCAR);
455 cyy_writeb(info, CyCAR, save_xir);
456 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
ce97a097 457
ce97a097 458 /* there is an open port for this data */
3aeea5b9
JS		 459 if (ivr == CyIVRRxEx) { /* exception */
460 data = cyy_readb(info, CyRDSR);
ce97a097
JS		 461
462 /* For statistics only */
463 if (data & CyBREAK)
464 info->icount.brk++;
465 else if (data & CyFRAME)
466 info->icount.frame++;
467 else if (data & CyPARITY)
468 info->icount.parity++;
469 else if (data & CyOVERRUN)
470 info->icount.overrun++;
471
472 if (data & info->ignore_status_mask) {
473 info->icount.rx++;
ce97a097
JS		 474 return;
475 }
227434f8 476 if (tty_buffer_request_room(port, 1)) {
ce97a097
JS		 477 if (data & info->read_status_mask) {
478 if (data & CyBREAK) {
92a19f9c 479 tty_insert_flip_char(port,
3aeea5b9
JS		 480 cyy_readb(info, CyRDSR),
481 TTY_BREAK);
ce97a097 482 info->icount.rx++;
6732c8bb
JS		 483 if (port->flags & ASYNC_SAK) {
484 struct tty_struct *tty =
485 tty_port_tty_get(port);
486 if (tty) {
487 do_SAK(tty);
488 tty_kref_put(tty);
489 }
490 }
ce97a097 491 } else if (data & CyFRAME) {
92a19f9c 492 tty_insert_flip_char(port,
3aeea5b9
JS		 493 cyy_readb(info, CyRDSR),
494 TTY_FRAME);
ce97a097
JS		 495 info->icount.rx++;
496 info->idle_stats.frame_errs++;
497 } else if (data & CyPARITY) {
498 /* Pieces of seven... */
92a19f9c 499 tty_insert_flip_char(port,
3aeea5b9
JS		 500 cyy_readb(info, CyRDSR),
501 TTY_PARITY);
ce97a097
JS		 502 info->icount.rx++;
503 info->idle_stats.parity_errs++;
504 } else if (data & CyOVERRUN) {
92a19f9c 505 tty_insert_flip_char(port, 0,
ce97a097
JS		 506 TTY_OVERRUN);
507 info->icount.rx++;
508 /* If the flip buffer itself is
509 overflowing, we still lose
510 the next incoming character.
511 */
92a19f9c 512 tty_insert_flip_char(port,
3aeea5b9
JS		 513 cyy_readb(info, CyRDSR),
514 TTY_FRAME);
02f1175c 515 info->icount.rx++;
02f1175c 516 info->idle_stats.overruns++;
ce97a097
JS		 517 /* These two conditions may imply */
518 /* a normal read should be done. */
519 /* } else if(data & CyTIMEOUT) { */
520 /* } else if(data & CySPECHAR) { */
521 } else {
92a19f9c 522 tty_insert_flip_char(port, 0,
ce97a097
JS		 523 TTY_NORMAL);
524 info->icount.rx++;
02f1175c 525 }
ce97a097 526 } else {
92a19f9c 527 tty_insert_flip_char(port, 0, TTY_NORMAL);
ce97a097
JS		 528 info->icount.rx++;
529 }
530 } else {
531 /* there was a software buffer overrun and nothing
532 * could be done about it!!! */
533 info->icount.buf_overrun++;
534 info->idle_stats.overruns++;
535 }
536 } else { /* normal character reception */
537 /* load # chars available from the chip */
3aeea5b9 538 char_count = cyy_readb(info, CyRDCR);
e941027f
JS		 539
540#ifdef CY_ENABLE_MONITORING
ce97a097
JS		 541 ++info->mon.int_count;
542 info->mon.char_count += char_count;
543 if (char_count > info->mon.char_max)
544 info->mon.char_max = char_count;
545 info->mon.char_last = char_count;
e941027f 546#endif
227434f8 547 len = tty_buffer_request_room(port, char_count);
ce97a097 548 while (len--) {
3aeea5b9 549 data = cyy_readb(info, CyRDSR);
92a19f9c 550 tty_insert_flip_char(port, data, TTY_NORMAL);
ce97a097
JS		 551 info->idle_stats.recv_bytes++;
552 info->icount.rx++;
e941027f 553#ifdef CY_16Y_HACK
ce97a097 554 udelay(10L);
e941027f 555#endif
e941027f 556 }
ce97a097 557 info->idle_stats.recv_idle = jiffies;
e941027f 558 }
6732c8bb
JS		 559 tty_schedule_flip(port);
560
ce97a097 561 /* end of service */
3aeea5b9
JS		 562 cyy_writeb(info, CyRIR, save_xir & 0x3f);
563 cyy_writeb(info, CyCAR, save_car);
ce97a097 564}
e941027f 565
65f76a82 566static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
ce97a097
JS		 567 void __iomem *base_addr)
568{
569 struct cyclades_port *info;
d13549f8 570 struct tty_struct *tty;
65f76a82
JS		 571 int char_count, index = cinfo->bus_index;
572 u8 save_xir, channel, save_car, outch;
ce97a097
JS		 573
574 /* Since we only get here when the transmit buffer
575 is empty, we know we can always stuff a dozen
576 characters. */
e941027f 577#ifdef CY_DEBUG_INTERRUPTS
ce97a097 578 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 579#endif
580
ce97a097 581 /* determine the channel & change to that context */
65f76a82
JS		 582 save_xir = readb(base_addr + (CyTIR << index));
583 channel = save_xir & CyIRChannel;
ce97a097
JS		 584 save_car = readb(base_addr + (CyCAR << index));
585 cy_writeb(base_addr + (CyCAR << index), save_xir);
586
ce97a097 587 info = &cinfo->ports[channel + chip * 4];
d13549f8
JS		 588 tty = tty_port_tty_get(&info->port);
589 if (tty == NULL) {
3aeea5b9 590 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 591 goto end;
592 }
02f1175c 593
ce97a097
JS		 594 /* load the on-chip space for outbound data */
595 char_count = info->xmit_fifo_size;
02f1175c 596
ce97a097
JS		 597 if (info->x_char) { /* send special char */
598 outch = info->x_char;
3aeea5b9 599 cyy_writeb(info, CyTDR, outch);
ce97a097
JS		 600 char_count--;
601 info->icount.tx++;
602 info->x_char = 0;
603 }
02f1175c 604
ce97a097
JS		 605 if (info->breakon || info->breakoff) {
606 if (info->breakon) {
3aeea5b9
JS		 607 cyy_writeb(info, CyTDR, 0);
608 cyy_writeb(info, CyTDR, 0x81);
ce97a097
JS		 609 info->breakon = 0;
610 char_count -= 2;
e941027f 611 }
ce97a097 612 if (info->breakoff) {
3aeea5b9
JS		 613 cyy_writeb(info, CyTDR, 0);
614 cyy_writeb(info, CyTDR, 0x83);
ce97a097
JS		 615 info->breakoff = 0;
616 char_count -= 2;
e941027f 617 }
ce97a097 618 }
02f1175c 619
ce97a097
JS		 620 while (char_count-- > 0) {
621 if (!info->xmit_cnt) {
3aeea5b9
JS		 622 if (cyy_readb(info, CySRER) & CyTxMpty) {
623 cyy_writeb(info, CySRER,
624 cyy_readb(info, CySRER) & ~CyTxMpty);
ce97a097 625 } else {
3aeea5b9
JS		 626 cyy_writeb(info, CySRER, CyTxMpty |
627 (cyy_readb(info, CySRER) & ~CyTxRdy));
02f1175c 628 }
ce97a097
JS		 629 goto done;
630 }
77451e53 631 if (info->port.xmit_buf == NULL) {
3aeea5b9
JS		 632 cyy_writeb(info, CySRER,
633 cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 634 goto done;
635 }
d13549f8 636 if (tty->stopped || tty->hw_stopped) {
3aeea5b9
JS		 637 cyy_writeb(info, CySRER,
638 cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 639 goto done;
640 }
641 /* Because the Embedded Transmit Commands have been enabled,
642 * we must check to see if the escape character, NULL, is being
643 * sent. If it is, we must ensure that there is room for it to
644 * be doubled in the output stream. Therefore we no longer
645 * advance the pointer when the character is fetched, but
646 * rather wait until after the check for a NULL output
647 * character. This is necessary because there may not be room
648 * for the two chars needed to send a NULL.)
649 */
77451e53 650 outch = info->port.xmit_buf[info->xmit_tail];
ce97a097
JS		 651 if (outch) {
652 info->xmit_cnt--;
653 info->xmit_tail = (info->xmit_tail + 1) &
654 (SERIAL_XMIT_SIZE - 1);
3aeea5b9 655 cyy_writeb(info, CyTDR, outch);
ce97a097
JS		 656 info->icount.tx++;
657 } else {
658 if (char_count > 1) {
02f1175c
JS		 659 info->xmit_cnt--;
660 info->xmit_tail = (info->xmit_tail + 1) &
ce97a097 661 (SERIAL_XMIT_SIZE - 1);
3aeea5b9
JS		 662 cyy_writeb(info, CyTDR, outch);
663 cyy_writeb(info, CyTDR, 0);
02f1175c 664 info->icount.tx++;
ce97a097 665 char_count--;
02f1175c 666 }
e941027f 667 }
e941027f
JS		 668 }
669
ce97a097 670done:
d13549f8
JS		 671 tty_wakeup(tty);
672 tty_kref_put(tty);
ce97a097
JS		 673end:
674 /* end of service */
3aeea5b9
JS		 675 cyy_writeb(info, CyTIR, save_xir & 0x3f);
676 cyy_writeb(info, CyCAR, save_car);
ce97a097 677}
02f1175c 678
ce97a097
JS		 679static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
680 void __iomem *base_addr)
681{
682 struct cyclades_port *info;
d13549f8 683 struct tty_struct *tty;
65f76a82
JS		 684 int index = cinfo->bus_index;
685 u8 save_xir, channel, save_car, mdm_change, mdm_status;
ce97a097
JS		 686
687 /* determine the channel & change to that context */
65f76a82
JS		 688 save_xir = readb(base_addr + (CyMIR << index));
689 channel = save_xir & CyIRChannel;
ce97a097 690 info = &cinfo->ports[channel + chip * 4];
3aeea5b9
JS		 691 save_car = cyy_readb(info, CyCAR);
692 cyy_writeb(info, CyCAR, save_xir);
ce97a097 693
3aeea5b9
JS		 694 mdm_change = cyy_readb(info, CyMISR);
695 mdm_status = cyy_readb(info, CyMSVR1);
ce97a097 696
d13549f8
JS		 697 tty = tty_port_tty_get(&info->port);
698 if (!tty)
ce97a097
JS		 699 goto end;
700
701 if (mdm_change & CyANY_DELTA) {
702 /* For statistics only */
703 if (mdm_change & CyDCD)
704 info->icount.dcd++;
705 if (mdm_change & CyCTS)
706 info->icount.cts++;
707 if (mdm_change & CyDSR)
708 info->icount.dsr++;
709 if (mdm_change & CyRI)
710 info->icount.rng++;
711
bdc04e31 712 wake_up_interruptible(&info->port.delta_msr_wait);
ce97a097
JS		 713 }
714
2d68655d 715 if ((mdm_change & CyDCD) && tty_port_check_carrier(&info->port)) {
174e6fe0
JS		 716 if (mdm_status & CyDCD)
717 wake_up_interruptible(&info->port.open_wait);
718 else
d13549f8 719 tty_hangup(tty);
ce97a097 720 }
f21ec3d2 721 if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
d13549f8 722 if (tty->hw_stopped) {
ce97a097
JS		 723 if (mdm_status & CyCTS) {
724 /* cy_start isn't used
725 because... !!! */
d13549f8 726 tty->hw_stopped = 0;
3aeea5b9
JS		 727 cyy_writeb(info, CySRER,
728 cyy_readb(info, CySRER) | CyTxRdy);
d13549f8 729 tty_wakeup(tty);
02f1175c 730 }
ce97a097
JS		 731 } else {
732 if (!(mdm_status & CyCTS)) {
733 /* cy_stop isn't used
734 because ... !!! */
d13549f8 735 tty->hw_stopped = 1;
3aeea5b9
JS		 736 cyy_writeb(info, CySRER,
737 cyy_readb(info, CySRER) & ~CyTxRdy);
02f1175c 738 }
e941027f 739 }
e941027f 740 }
ce97a097
JS		 741/* if (mdm_change & CyDSR) {
742 }
743 if (mdm_change & CyRI) {
744 }*/
d13549f8 745 tty_kref_put(tty);
ce97a097
JS		 746end:
747 /* end of service */
3aeea5b9
JS		 748 cyy_writeb(info, CyMIR, save_xir & 0x3f);
749 cyy_writeb(info, CyCAR, save_car);
e941027f
JS		 750}
751
1da177e4
LT		 752/* The real interrupt service routine is called
753 whenever the card wants its hand held--chars
754 received, out buffer empty, modem change, etc.
755 */
02f1175c 756static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 757{
02f1175c 758 int status;
f7429034 759 struct cyclades_card *cinfo = dev_id;
02f1175c 760 void __iomem *base_addr, *card_base_addr;
65f76a82 761 unsigned int chip, too_many, had_work;
02f1175c 762 int index;
02f1175c 763
f7429034 764 if (unlikely(cinfo == NULL)) {
1da177e4 765#ifdef CY_DEBUG_INTERRUPTS
15ed6cc0
AC		 766 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
767 irq);
1da177e4 768#endif
02f1175c
JS		 769 return IRQ_NONE; /* spurious interrupt */
770 }
771
772 card_base_addr = cinfo->base_addr;
773 index = cinfo->bus_index;
774
f1e83c6c
JS		 775 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
776 if (unlikely(card_base_addr == NULL))
777 return IRQ_HANDLED;
778
02f1175c
JS		 779 /* This loop checks all chips in the card. Make a note whenever
780 _any_ chip had some work to do, as this is considered an
781 indication that there will be more to do. Only when no chip
782 has any work does this outermost loop exit.
783 */
784 do {
785 had_work = 0;
786 for (chip = 0; chip < cinfo->num_chips; chip++) {
787 base_addr = cinfo->base_addr +
788 (cy_chip_offset[chip] << index);
789 too_many = 0;
db05c3b1 790 while ((status = readb(base_addr +
02f1175c
JS		 791 (CySVRR << index))) != 0x00) {
792 had_work++;
793 /* The purpose of the following test is to ensure that
794 no chip can monopolize the driver. This forces the
795 chips to be checked in a round-robin fashion (after
796 draining each of a bunch (1000) of characters).
797 */
ce97a097 798 if (1000 < too_many++)
02f1175c 799 break;
1c0a387c 800 spin_lock(&cinfo->card_lock);
ce97a097
JS		 801 if (status & CySRReceive) /* rx intr */
802 cyy_chip_rx(cinfo, chip, base_addr);
803 if (status & CySRTransmit) /* tx intr */
804 cyy_chip_tx(cinfo, chip, base_addr);
805 if (status & CySRModem) /* modem intr */
806 cyy_chip_modem(cinfo, chip, base_addr);
1c0a387c 807 spin_unlock(&cinfo->card_lock);
02f1175c
JS		 808 }
809 }
810 } while (had_work);
811
812 /* clear interrupts */
813 spin_lock(&cinfo->card_lock);
814 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
815 /* Cy_ClrIntr is 0x1800 */
816 spin_unlock(&cinfo->card_lock);
817 return IRQ_HANDLED;
818} /* cyy_interrupt */
1da177e4 819
4d768200
JS		 820static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
821 unsigned int clear)
822{
823 struct cyclades_card *card = info->card;
3aeea5b9 824 int channel = info->line - card->first_line;
0d348729 825 u32 rts, dtr, msvrr, msvrd;
4d768200 826
4d768200 827 channel &= 0x03;
4d768200 828
0d348729
JS		 829 if (info->rtsdtr_inv) {
830 msvrr = CyMSVR2;
831 msvrd = CyMSVR1;
832 rts = CyDTR;
833 dtr = CyRTS;
834 } else {
835 msvrr = CyMSVR1;
836 msvrd = CyMSVR2;
837 rts = CyRTS;
838 dtr = CyDTR;
839 }
4d768200 840 if (set & TIOCM_RTS) {
3aeea5b9
JS		 841 cyy_writeb(info, CyCAR, channel);
842 cyy_writeb(info, msvrr, rts);
4d768200
JS		 843 }
844 if (clear & TIOCM_RTS) {
3aeea5b9
JS		 845 cyy_writeb(info, CyCAR, channel);
846 cyy_writeb(info, msvrr, ~rts);
4d768200
JS		 847 }
848 if (set & TIOCM_DTR) {
3aeea5b9
JS		 849 cyy_writeb(info, CyCAR, channel);
850 cyy_writeb(info, msvrd, dtr);
4d768200
JS		 851#ifdef CY_DEBUG_DTR
852 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
853 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3aeea5b9
JS		 854 cyy_readb(info, CyMSVR1),
855 cyy_readb(info, CyMSVR2));
4d768200
JS		 856#endif
857 }
858 if (clear & TIOCM_DTR) {
3aeea5b9
JS		 859 cyy_writeb(info, CyCAR, channel);
860 cyy_writeb(info, msvrd, ~dtr);
4d768200
JS		 861#ifdef CY_DEBUG_DTR
862 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
863 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3aeea5b9
JS		 864 cyy_readb(info, CyMSVR1),
865 cyy_readb(info, CyMSVR2));
4d768200
JS		 866#endif
867 }
868}
869
1da177e4
LT		 870/***********************************************************/
871/********* End of block of Cyclom-Y specific code **********/
15ed6cc0 872/******** Start of block of Cyclades-Z specific code *******/
1da177e4
LT		 873/***********************************************************/
874
875static int
02f1175c 876cyz_fetch_msg(struct cyclades_card *cinfo,
15ed6cc0 877 __u32 *channel, __u8 *cmd, __u32 *param)
1da177e4 878{
f0eefdc3 879 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
02f1175c
JS		 880 unsigned long loc_doorbell;
881
97e87f8e 882 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
02f1175c
JS		 883 if (loc_doorbell) {
884 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 885 *channel = readl(&board_ctrl->fwcmd_channel);
886 *param = (__u32) readl(&board_ctrl->fwcmd_param);
97e87f8e 887 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
02f1175c
JS		 888 return 1;
889 }
890 return 0;
891} /* cyz_fetch_msg */
1da177e4
LT		 892
893static int
02f1175c 894cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 895 __u32 channel, __u8 cmd, __u32 param)
1da177e4 896{
f0eefdc3 897 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1a86b5e3 898 __u32 __iomem *pci_doorbell;
65f76a82 899 unsigned int index;
02f1175c 900
2693f485 901 if (!cyz_is_loaded(cinfo))
096dcfce 902 return -1;
15ed6cc0 903
02f1175c 904 index = 0;
97e87f8e 905 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
db05c3b1 906 while ((readl(pci_doorbell) & 0xff) != 0) {
15ed6cc0 907 if (index++ == 1000)
db05c3b1 908 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 909 udelay(50L);
910 }
911 cy_writel(&board_ctrl->hcmd_channel, channel);
912 cy_writel(&board_ctrl->hcmd_param, param);
913 cy_writel(pci_doorbell, (long)cmd);
914
096dcfce 915 return 0;
02f1175c 916} /* cyz_issue_cmd */
1da177e4 917
dabe2c13 918static void cyz_handle_rx(struct cyclades_port *info)
1da177e4 919{
f0eefdc3 920 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
875b206b 921 struct cyclades_card *cinfo = info->card;
227434f8 922 struct tty_port *port = &info->port;
65f76a82 923 unsigned int char_count;
02f1175c 924 int len;
1da177e4 925#ifdef BLOCKMOVE
ce71b0ff 926 unsigned char *buf;
1da177e4 927#else
02f1175c 928 char data;
1da177e4 929#endif
ad39c300 930 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 931
db05c3b1
JS		 932 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
933 rx_put = readl(&buf_ctrl->rx_put);
934 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
935 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 936 if (rx_put >= rx_get)
937 char_count = rx_put - rx_get;
938 else
939 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 940
dabe2c13
JS		 941 if (!char_count)
942 return;
943
1da177e4 944#ifdef CY_ENABLE_MONITORING
dabe2c13
JS		 945 info->mon.int_count++;
946 info->mon.char_count += char_count;
947 if (char_count > info->mon.char_max)
948 info->mon.char_max = char_count;
949 info->mon.char_last = char_count;
1da177e4 950#endif
dabe2c13 951
1da177e4 952#ifdef BLOCKMOVE
dabe2c13
JS		 953 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
954 for performance, but because of buffer boundaries, there
955 may be several steps to the operation */
956 while (1) {
957 len = tty_prepare_flip_string(port, &buf,
958 char_count);
959 if (!len)
960 break;
ce71b0ff 961
dabe2c13
JS		 962 len = min_t(unsigned int, min(len, char_count),
963 rx_bufsize - new_rx_get);
ce71b0ff 964
dabe2c13
JS		 965 memcpy_fromio(buf, cinfo->base_addr +
966 rx_bufaddr + new_rx_get, len);
ce71b0ff 967
dabe2c13
JS		 968 new_rx_get = (new_rx_get + len) &
969 (rx_bufsize - 1);
970 char_count -= len;
971 info->icount.rx += len;
972 info->idle_stats.recv_bytes += len;
973 }
1da177e4 974#else
dabe2c13
JS		 975 len = tty_buffer_request_room(port, char_count);
976 while (len--) {
977 data = readb(cinfo->base_addr + rx_bufaddr +
978 new_rx_get);
979 new_rx_get = (new_rx_get + 1) &
980 (rx_bufsize - 1);
981 tty_insert_flip_char(port, data, TTY_NORMAL);
982 info->idle_stats.recv_bytes++;
983 info->icount.rx++;
984 }
1da177e4
LT		 985#endif
986#ifdef CONFIG_CYZ_INTR
dabe2c13
JS		 987 /* Recalculate the number of chars in the RX buffer and issue
988 a cmd in case it's higher than the RX high water mark */
989 rx_put = readl(&buf_ctrl->rx_put);
990 if (rx_put >= rx_get)
991 char_count = rx_put - rx_get;
992 else
993 char_count = rx_put - rx_get + rx_bufsize;
994 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
995 !timer_pending(&cyz_rx_full_timer[
996 info->line]))
997 mod_timer(&cyz_rx_full_timer[info->line],
998 jiffies + 1);
1da177e4 999#endif
dabe2c13
JS		 1000 info->idle_stats.recv_idle = jiffies;
1001 tty_schedule_flip(&info->port);
1002
1003 /* Update rx_get */
1004 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4
LT		 1005}
1006
dabe2c13 1007static void cyz_handle_tx(struct cyclades_port *info)
1da177e4 1008{
f0eefdc3 1009 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
875b206b 1010 struct cyclades_card *cinfo = info->card;
dabe2c13 1011 struct tty_struct *tty;
65f76a82
JS		 1012 u8 data;
1013 unsigned int char_count;
1da177e4 1014#ifdef BLOCKMOVE
02f1175c 1015 int small_count;
1da177e4 1016#endif
ad39c300 1017 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1018
02f1175c
JS		 1019 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1020 return;
1da177e4 1021
db05c3b1
JS		 1022 tx_get = readl(&buf_ctrl->tx_get);
1023 tx_put = readl(&buf_ctrl->tx_put);
1024 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1025 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1026 if (tx_put >= tx_get)
1027 char_count = tx_get - tx_put - 1 + tx_bufsize;
1028 else
1029 char_count = tx_get - tx_put - 1;
1da177e4 1030
dabe2c13
JS		 1031 if (!char_count)
1032 return;
1033
1034 tty = tty_port_tty_get(&info->port);
1035 if (tty == NULL)
1036 goto ztxdone;
1da177e4 1037
dabe2c13
JS		 1038 if (info->x_char) { /* send special char */
1039 data = info->x_char;
1da177e4 1040
dabe2c13
JS		 1041 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1042 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1043 info->x_char = 0;
1044 char_count--;
1045 info->icount.tx++;
1046 }
1da177e4 1047#ifdef BLOCKMOVE
dabe2c13
JS		 1048 while (0 < (small_count = min_t(unsigned int,
1049 tx_bufsize - tx_put, min_t(unsigned int,
1050 (SERIAL_XMIT_SIZE - info->xmit_tail),
1051 min_t(unsigned int, info->xmit_cnt,
1052 char_count))))) {
1053
1054 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1055 &info->port.xmit_buf[info->xmit_tail],
1056 small_count);
1057
1058 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1059 char_count -= small_count;
1060 info->icount.tx += small_count;
1061 info->xmit_cnt -= small_count;
1062 info->xmit_tail = (info->xmit_tail + small_count) &
1063 (SERIAL_XMIT_SIZE - 1);
1064 }
1da177e4 1065#else
dabe2c13
JS		 1066 while (info->xmit_cnt && char_count) {
1067 data = info->port.xmit_buf[info->xmit_tail];
1068 info->xmit_cnt--;
1069 info->xmit_tail = (info->xmit_tail + 1) &
1070 (SERIAL_XMIT_SIZE - 1);
1071
1072 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1073 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1074 char_count--;
1075 info->icount.tx++;
1076 }
1da177e4 1077#endif
dabe2c13
JS		 1078 tty_wakeup(tty);
1079 tty_kref_put(tty);
7fa57a0c 1080ztxdone:
dabe2c13
JS		 1081 /* Update tx_put */
1082 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4
LT		 1083}
1084
02f1175c 1085static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1086{
f0eefdc3 1087 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
02f1175c 1088 struct cyclades_port *info;
101b8159 1089 __u32 channel, param, fw_ver;
1a86b5e3 1090 __u8 cmd;
02f1175c
JS		 1091 int special_count;
1092 int delta_count;
1093
db05c3b1 1094 fw_ver = readl(&board_ctrl->fw_version);
02f1175c
JS		 1095
1096 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1097 special_count = 0;
1098 delta_count = 0;
dd025c0c 1099 info = &cinfo->ports[channel];
f7429034 1100
02f1175c
JS		 1101 switch (cmd) {
1102 case C_CM_PR_ERROR:
92a19f9c 1103 tty_insert_flip_char(&info->port, 0, TTY_PARITY);
02f1175c
JS		 1104 info->icount.rx++;
1105 special_count++;
1106 break;
1107 case C_CM_FR_ERROR:
92a19f9c 1108 tty_insert_flip_char(&info->port, 0, TTY_FRAME);
02f1175c
JS		 1109 info->icount.rx++;
1110 special_count++;
1111 break;
1112 case C_CM_RXBRK:
92a19f9c 1113 tty_insert_flip_char(&info->port, 0, TTY_BREAK);
02f1175c
JS		 1114 info->icount.rx++;
1115 special_count++;
1116 break;
1117 case C_CM_MDCD:
1118 info->icount.dcd++;
1119 delta_count++;
2d68655d 1120 if (tty_port_check_carrier(&info->port)) {
f0eefdc3
JS		 1121 u32 dcd = fw_ver > 241 ? param :
1122 readl(&info->u.cyz.ch_ctrl->rs_status);
174e6fe0 1123 if (dcd & C_RS_DCD)
77451e53 1124 wake_up_interruptible(&info->port.open_wait);
aa27a094
JS		 1125 else
1126 tty_port_tty_hangup(&info->port, false);
02f1175c
JS		 1127 }
1128 break;
1129 case C_CM_MCTS:
1130 info->icount.cts++;
1131 delta_count++;
1132 break;
1133 case C_CM_MRI:
1134 info->icount.rng++;
1135 delta_count++;
1136 break;
1137 case C_CM_MDSR:
1138 info->icount.dsr++;
1139 delta_count++;
1140 break;
1da177e4 1141#ifdef Z_WAKE
02f1175c 1142 case C_CM_IOCTLW:
ebafeeff 1143 complete(&info->shutdown_wait);
02f1175c 1144 break;
1da177e4
LT		 1145#endif
1146#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1147 case C_CM_RXHIWM:
1148 case C_CM_RXNNDT:
1149 case C_CM_INTBACK2:
1150 /* Reception Interrupt */
1da177e4 1151#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1152 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1153 "port %ld\n", info->card, channel);
1da177e4 1154#endif
dabe2c13 1155 cyz_handle_rx(info);
02f1175c
JS		 1156 break;
1157 case C_CM_TXBEMPTY:
1158 case C_CM_TXLOWWM:
1159 case C_CM_INTBACK:
1160 /* Transmission Interrupt */
1da177e4 1161#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1162 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1163 "port %ld\n", info->card, channel);
1da177e4 1164#endif
dabe2c13 1165 cyz_handle_tx(info);
02f1175c
JS		 1166 break;
1167#endif /* CONFIG_CYZ_INTR */
1168 case C_CM_FATAL:
1169 /* should do something with this !!! */
1170 break;
1171 default:
1172 break;
1173 }
1174 if (delta_count)
bdc04e31 1175 wake_up_interruptible(&info->port.delta_msr_wait);
02f1175c 1176 if (special_count)
6732c8bb 1177 tty_schedule_flip(&info->port);
1da177e4 1178 }
1da177e4
LT		 1179}
1180
1181#ifdef CONFIG_CYZ_INTR
02f1175c 1182static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1183{
f7429034 1184 struct cyclades_card *cinfo = dev_id;
1da177e4 1185
2693f485 1186 if (unlikely(!cyz_is_loaded(cinfo))) {
1da177e4 1187#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1188 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1189 "(IRQ%d).\n", irq);
1da177e4 1190#endif
02f1175c
JS		 1191 return IRQ_NONE;
1192 }
1da177e4 1193
02f1175c
JS		 1194 /* Handle the interrupts */
1195 cyz_handle_cmd(cinfo);
1da177e4 1196
02f1175c
JS		 1197 return IRQ_HANDLED;
1198} /* cyz_interrupt */
1da177e4 1199
02f1175c 1200static void cyz_rx_restart(unsigned long arg)
1da177e4 1201{
02f1175c 1202 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1203 struct cyclades_card *card = info->card;
02f1175c 1204 int retval;
875b206b 1205 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1206 unsigned long flags;
1207
9fa1b3b1 1208 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1209 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1210 if (retval != 0) {
21719191 1211 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1212 info->line, retval);
1213 }
9fa1b3b1 1214 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1215}
1216
02f1175c 1217#else /* CONFIG_CYZ_INTR */
1da177e4 1218
02f1175c 1219static void cyz_poll(unsigned long arg)
1da177e4 1220{
02f1175c
JS		 1221 struct cyclades_card *cinfo;
1222 struct cyclades_port *info;
b7050906 1223 unsigned long expires = jiffies + HZ;
65f76a82 1224 unsigned int port, card;
1da177e4 1225
02f1175c
JS		 1226 for (card = 0; card < NR_CARDS; card++) {
1227 cinfo = &cy_card[card];
1228
2693f485 1229 if (!cy_is_Z(cinfo))
02f1175c 1230 continue;
2693f485 1231 if (!cyz_is_loaded(cinfo))
02f1175c
JS		 1232 continue;
1233
1da177e4 1234 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1235 if (!cinfo->intr_enabled) {
02f1175c
JS		 1236 cinfo->intr_enabled = 1;
1237 continue;
1238 }
1da177e4 1239
02f1175c 1240 cyz_handle_cmd(cinfo);
1da177e4 1241
02f1175c 1242 for (port = 0; port < cinfo->nports; port++) {
dd025c0c 1243 info = &cinfo->ports[port];
d13549f8 1244
02f1175c 1245 if (!info->throttle)
dabe2c13
JS		 1246 cyz_handle_rx(info);
1247 cyz_handle_tx(info);
02f1175c
JS		 1248 }
1249 /* poll every 'cyz_polling_cycle' period */
b7050906 1250 expires = jiffies + cyz_polling_cycle;
1da177e4 1251 }
b7050906 1252 mod_timer(&cyz_timerlist, expires);
02f1175c 1253} /* cyz_poll */
1da177e4 1254
02f1175c 1255#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1256
1257/********** End of block of Cyclades-Z specific code *********/
1258/***********************************************************/
1259
1da177e4
LT		 1260/* This is called whenever a port becomes active;
1261 interrupts are enabled and DTR & RTS are turned on.
1262 */
d13549f8 1263static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1264{
875b206b 1265 struct cyclades_card *card;
02f1175c
JS		 1266 unsigned long flags;
1267 int retval = 0;
cc7fdf49 1268 int channel;
02f1175c 1269 unsigned long page;
1da177e4 1270
02f1175c 1271 card = info->card;
875b206b 1272 channel = info->line - card->first_line;
1da177e4 1273
02f1175c
JS		 1274 page = get_zeroed_page(GFP_KERNEL);
1275 if (!page)
1276 return -ENOMEM;
1da177e4 1277
9fa1b3b1 1278 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1279
d41861ca 1280 if (tty_port_initialized(&info->port))
02f1175c 1281 goto errout;
1da177e4 1282
02f1175c 1283 if (!info->type) {
d13549f8 1284 set_bit(TTY_IO_ERROR, &tty->flags);
02f1175c
JS		 1285 goto errout;
1286 }
1da177e4 1287
77451e53 1288 if (info->port.xmit_buf)
02f1175c
JS		 1289 free_page(page);
1290 else
77451e53 1291 info->port.xmit_buf = (unsigned char *)page;
1da177e4 1292
9fa1b3b1 1293 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1294
d13549f8 1295 cy_set_line_char(info, tty);
1da177e4 1296
2693f485 1297 if (!cy_is_Z(card)) {
02f1175c 1298 channel &= 0x03;
1da177e4 1299
9fa1b3b1 1300 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1301
3aeea5b9 1302 cyy_writeb(info, CyCAR, channel);
1da177e4 1303
3aeea5b9 1304 cyy_writeb(info, CyRTPR,
02f1175c
JS		 1305 (info->default_timeout ? info->default_timeout : 0x02));
1306 /* 10ms rx timeout */
1da177e4 1307
3aeea5b9 1308 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1da177e4 1309
4d768200 1310 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1da177e4 1311
3aeea5b9 1312 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
02f1175c 1313 } else {
f0eefdc3 1314 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1da177e4 1315
2693f485 1316 if (!cyz_is_loaded(card))
02f1175c 1317 return -ENODEV;
1da177e4 1318
1da177e4 1319#ifdef CY_DEBUG_OPEN
21719191 1320 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
f0eefdc3 1321 "base_addr %p\n", card, channel, card->base_addr);
1da177e4 1322#endif
9fa1b3b1 1323 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1324
f0eefdc3 1325 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1da177e4
LT		 1326#ifdef Z_WAKE
1327#ifdef CONFIG_CYZ_INTR
f0eefdc3 1328 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1329 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1330 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 1331#else
f0eefdc3 1332 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1333 C_IN_IOCTLW | C_IN_MDCD);
1334#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1335#else
1336#ifdef CONFIG_CYZ_INTR
f0eefdc3 1337 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1338 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1339 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 1340#else
f0eefdc3 1341 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
02f1175c
JS		 1342#endif /* CONFIG_CYZ_INTR */
1343#endif /* Z_WAKE */
1344
875b206b 1345 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 1346 if (retval != 0) {
21719191
JS		 1347 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1348 "%x\n", info->line, retval);
02f1175c 1349 }
1da177e4 1350
02f1175c 1351 /* Flush RX buffers before raising DTR and RTS */
875b206b 1352 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 1353 if (retval != 0) {
21719191
JS		 1354 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1355 "%x\n", info->line, retval);
02f1175c 1356 }
1da177e4 1357
02f1175c
JS		 1358 /* set timeout !!! */
1359 /* set RTS and DTR !!! */
4d768200 1360 tty_port_raise_dtr_rts(&info->port);
1da177e4 1361
02f1175c 1362 /* enable send, recv, modem !!! */
cc7fdf49 1363 }
02f1175c 1364
d41861ca 1365 tty_port_set_initialized(&info->port, 1);
1da177e4 1366
cc7fdf49
JS		 1367 clear_bit(TTY_IO_ERROR, &tty->flags);
1368 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1369 info->breakon = info->breakoff = 0;
1370 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1371 info->idle_stats.in_use =
1372 info->idle_stats.recv_idle =
1373 info->idle_stats.xmit_idle = jiffies;
1374
1375 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1376
1377#ifdef CY_DEBUG_OPEN
21719191 1378 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 1379#endif
1380 return 0;
1381
1382errout:
9fa1b3b1 1383 spin_unlock_irqrestore(&card->card_lock, flags);
cc7fdf49 1384 free_page(page);
1da177e4 1385 return retval;
02f1175c 1386} /* startup */
1da177e4 1387
02f1175c 1388static void start_xmit(struct cyclades_port *info)
1da177e4 1389{
3aeea5b9 1390 struct cyclades_card *card = info->card;
02f1175c 1391 unsigned long flags;
3aeea5b9 1392 int channel = info->line - card->first_line;
1da177e4 1393
2693f485 1394 if (!cy_is_Z(card)) {
9fa1b3b1 1395 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 1396 cyy_writeb(info, CyCAR, channel & 0x03);
1397 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
9fa1b3b1 1398 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1399 } else {
1da177e4 1400#ifdef CONFIG_CYZ_INTR
02f1175c 1401 int retval;
1da177e4 1402
9fa1b3b1 1403 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1404 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 1405 if (retval != 0) {
21719191
JS		 1406 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1407 "%x\n", info->line, retval);
02f1175c 1408 }
9fa1b3b1 1409 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 1410#else /* CONFIG_CYZ_INTR */
1411 /* Don't have to do anything at this time */
1412#endif /* CONFIG_CYZ_INTR */
1413 }
1414} /* start_xmit */
1da177e4
LT		 1415
1416/*
1417 * This routine shuts down a serial port; interrupts are disabled,
1418 * and DTR is dropped if the hangup on close termio flag is on.
1419 */
d13549f8 1420static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1421{
875b206b 1422 struct cyclades_card *card;
02f1175c 1423 unsigned long flags;
02f1175c 1424
d41861ca 1425 if (!tty_port_initialized(&info->port))
02f1175c 1426 return;
02f1175c
JS		 1427
1428 card = info->card;
2693f485 1429 if (!cy_is_Z(card)) {
9fa1b3b1 1430 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 1431
1432 /* Clear delta_msr_wait queue to avoid mem leaks. */
bdc04e31 1433 wake_up_interruptible(&info->port.delta_msr_wait);
1da177e4 1434
77451e53 1435 if (info->port.xmit_buf) {
02f1175c 1436 unsigned char *temp;
77451e53
AC		 1437 temp = info->port.xmit_buf;
1438 info->port.xmit_buf = NULL;
02f1175c
JS		 1439 free_page((unsigned long)temp);
1440 }
9db276f8 1441 if (C_HUPCL(tty))
4d768200
JS		 1442 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1443
3aeea5b9 1444 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
02f1175c
JS		 1445 /* it may be appropriate to clear _XMIT at
1446 some later date (after testing)!!! */
1447
d13549f8 1448 set_bit(TTY_IO_ERROR, &tty->flags);
d41861ca 1449 tty_port_set_initialized(&info->port, 0);
9fa1b3b1 1450 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1451 } else {
1da177e4 1452#ifdef CY_DEBUG_OPEN
0e7f4194 1453 int channel = info->line - card->first_line;
21719191 1454 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
f0eefdc3 1455 "base_addr %p\n", card, channel, card->base_addr);
1da177e4
LT		 1456#endif
1457
2693f485 1458 if (!cyz_is_loaded(card))
02f1175c 1459 return;
1da177e4 1460
9fa1b3b1 1461 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1462
77451e53 1463 if (info->port.xmit_buf) {
02f1175c 1464 unsigned char *temp;
77451e53
AC		 1465 temp = info->port.xmit_buf;
1466 info->port.xmit_buf = NULL;
02f1175c 1467 free_page((unsigned long)temp);
1da177e4 1468 }
02f1175c 1469
9db276f8 1470 if (C_HUPCL(tty))
4d768200 1471 tty_port_lower_dtr_rts(&info->port);
1da177e4 1472
d13549f8 1473 set_bit(TTY_IO_ERROR, &tty->flags);
d41861ca 1474 tty_port_set_initialized(&info->port, 0);
02f1175c 1475
9fa1b3b1 1476 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1477 }
1da177e4
LT		 1478
1479#ifdef CY_DEBUG_OPEN
21719191 1480 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 1481#endif
02f1175c 1482} /* shutdown */
1da177e4
LT		 1483
1484/*
1485 * ------------------------------------------------------------
1486 * cy_open() and friends
1487 * ------------------------------------------------------------
1488 */
1489
1da177e4
LT		 1490/*
1491 * This routine is called whenever a serial port is opened. It
1492 * performs the serial-specific initialization for the tty structure.
1493 */
02f1175c 1494static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 1495{
02f1175c 1496 struct cyclades_port *info;
410235fd 1497 unsigned int i, line = tty->index;
65f76a82 1498 int retval;
1da177e4 1499
dd025c0c
JS		 1500 for (i = 0; i < NR_CARDS; i++)
1501 if (line < cy_card[i].first_line + cy_card[i].nports &&
1502 line >= cy_card[i].first_line)
1503 break;
1504 if (i >= NR_CARDS)
1505 return -ENODEV;
1506 info = &cy_card[i].ports[line - cy_card[i].first_line];
15ed6cc0 1507 if (info->line < 0)
02f1175c 1508 return -ENODEV;
1da177e4 1509
02f1175c
JS		 1510 /* If the card's firmware hasn't been loaded,
1511 treat it as absent from the system. This
1512 will make the user pay attention.
1513 */
2693f485 1514 if (cy_is_Z(info->card)) {
875b206b 1515 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 1516 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1517
2693f485
JS		 1518 if (!cyz_is_loaded(cinfo)) {
1519 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
101b8159
JS		 1520 readl(&firm_id->signature) ==
1521 ZFIRM_HLT) {
21719191
JS		 1522 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1523 "need an external power supply for "
1524 "this number of ports.\nFirmware "
1525 "halted.\n");
02f1175c 1526 } else {
21719191
JS		 1527 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1528 "yet loaded\n");
02f1175c
JS		 1529 }
1530 return -ENODEV;
1531 }
1532#ifdef CONFIG_CYZ_INTR
1533 else {
1534 /* In case this Z board is operating in interrupt mode, its
1535 interrupts should be enabled as soon as the first open
1536 happens to one of its ports. */
1537 if (!cinfo->intr_enabled) {
97e87f8e 1538 u16 intr;
02f1175c 1539
02f1175c 1540 /* Enable interrupts on the PLX chip */
97e87f8e
JS		 1541 intr = readw(&cinfo->ctl_addr.p9060->
1542 intr_ctrl_stat) | 0x0900;
1543 cy_writew(&cinfo->ctl_addr.p9060->
1544 intr_ctrl_stat, intr);
02f1175c
JS		 1545 /* Enable interrupts on the FW */
1546 retval = cyz_issue_cmd(cinfo, 0,
1547 C_CM_IRQ_ENBL, 0L);
1548 if (retval != 0) {
21719191
JS		 1549 printk(KERN_ERR "cyc:IRQ enable retval "
1550 "was %x\n", retval);
02f1175c 1551 }
02f1175c
JS		 1552 cinfo->intr_enabled = 1;
1553 }
1da177e4 1554 }
02f1175c
JS		 1555#endif /* CONFIG_CYZ_INTR */
1556 /* Make sure this Z port really exists in hardware */
1557 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1558 return -ENODEV;
1da177e4 1559 }
1da177e4 1560#ifdef CY_DEBUG_OTHER
21719191 1561 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 1562#endif
02f1175c 1563 tty->driver_data = info;
15ed6cc0 1564 if (serial_paranoia_check(info, tty->name, "cy_open"))
02f1175c 1565 return -ENODEV;
15ed6cc0 1566
1da177e4 1567#ifdef CY_DEBUG_OPEN
21719191 1568 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
77451e53 1569 info->port.count);
1da177e4 1570#endif
77451e53 1571 info->port.count++;
1da177e4 1572#ifdef CY_DEBUG_COUNT
21719191 1573 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
77451e53 1574 current->pid, info->port.count);
1da177e4 1575#endif
1da177e4 1576
02f1175c
JS		 1577 /*
1578 * Start up serial port
1579 */
d13549f8 1580 retval = cy_startup(info, tty);
15ed6cc0 1581 if (retval)
02f1175c 1582 return retval;
1da177e4 1583
f0737579 1584 retval = tty_port_block_til_ready(&info->port, tty, filp);
02f1175c 1585 if (retval) {
1da177e4 1586#ifdef CY_DEBUG_OPEN
21719191
JS		 1587 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1588 "with %d\n", retval);
1da177e4 1589#endif
02f1175c
JS		 1590 return retval;
1591 }
1da177e4 1592
02f1175c 1593 info->throttle = 0;
d13549f8 1594 tty_port_tty_set(&info->port, tty);
1da177e4 1595
02f1175c 1596#ifdef CY_DEBUG_OPEN
21719191 1597 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 1598#endif
1599 return 0;
1600} /* cy_open */
1da177e4
LT		 1601
1602/*
1603 * cy_wait_until_sent() --- wait until the transmitter is empty
1604 */
02f1175c 1605static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 1606{
875b206b 1607 struct cyclades_card *card;
cab9bdd1 1608 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1609 unsigned long orig_jiffies;
1610 int char_time;
1611
1612 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1613 return;
1614
1615 if (info->xmit_fifo_size == 0)
1616 return; /* Just in case.... */
1da177e4 1617
02f1175c
JS		 1618 orig_jiffies = jiffies;
1619 /*
1620 * Set the check interval to be 1/5 of the estimated time to
1621 * send a single character, and make it at least 1. The check
1622 * interval should also be less than the timeout.
1623 *
1624 * Note: we have to use pretty tight timings here to satisfy
1625 * the NIST-PCTS.
1626 */
1627 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1628 char_time = char_time / 5;
1629 if (char_time <= 0)
1630 char_time = 1;
1631 if (timeout < 0)
1632 timeout = 0;
1633 if (timeout)
1634 char_time = min(char_time, timeout);
1635 /*
1636 * If the transmitter hasn't cleared in twice the approximate
1637 * amount of time to send the entire FIFO, it probably won't
1638 * ever clear. This assumes the UART isn't doing flow
1639 * control, which is currently the case. Hence, if it ever
1640 * takes longer than info->timeout, this is probably due to a
1641 * UART bug of some kind. So, we clamp the timeout parameter at
1642 * 2*info->timeout.
1643 */
1644 if (!timeout || timeout > 2 * info->timeout)
1645 timeout = 2 * info->timeout;
8bab534b 1646
02f1175c 1647 card = info->card;
2693f485 1648 if (!cy_is_Z(card)) {
3aeea5b9 1649 while (cyy_readb(info, CySRER) & CyTxRdy) {
02f1175c
JS		 1650 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1651 break;
1652 if (timeout && time_after(jiffies, orig_jiffies +
1653 timeout))
1654 break;
1655 }
1da177e4 1656 }
02f1175c
JS		 1657 /* Run one more char cycle */
1658 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4
LT		 1659}
1660
978e595f
AC		 1661static void cy_flush_buffer(struct tty_struct *tty)
1662{
1663 struct cyclades_port *info = tty->driver_data;
1664 struct cyclades_card *card;
1665 int channel, retval;
1666 unsigned long flags;
1667
1668#ifdef CY_DEBUG_IO
1669 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1670#endif
1671
1672 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1673 return;
1674
1675 card = info->card;
1676 channel = info->line - card->first_line;
1677
1678 spin_lock_irqsave(&card->card_lock, flags);
1679 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1680 spin_unlock_irqrestore(&card->card_lock, flags);
1681
2693f485 1682 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
978e595f
AC		 1683 buffers as well */
1684 spin_lock_irqsave(&card->card_lock, flags);
1685 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1686 if (retval != 0) {
1687 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1688 "was %x\n", info->line, retval);
1689 }
1690 spin_unlock_irqrestore(&card->card_lock, flags);
1691 }
1692 tty_wakeup(tty);
1693} /* cy_flush_buffer */
1694
1695
e936ffd5 1696static void cy_do_close(struct tty_port *port)
1da177e4 1697{
e936ffd5
AC		 1698 struct cyclades_port *info = container_of(port, struct cyclades_port,
1699 port);
9fa1b3b1 1700 struct cyclades_card *card;
02f1175c 1701 unsigned long flags;
3aeea5b9 1702 int channel;
1da177e4 1703
9fa1b3b1 1704 card = info->card;
3aeea5b9 1705 channel = info->line - card->first_line;
9fa1b3b1 1706 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 1707
2693f485 1708 if (!cy_is_Z(card)) {
02f1175c 1709 /* Stop accepting input */
3aeea5b9
JS		 1710 cyy_writeb(info, CyCAR, channel & 0x03);
1711 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
d41861ca 1712 if (tty_port_initialized(&info->port)) {
15ed6cc0
AC		 1713 /* Waiting for on-board buffers to be empty before
1714 closing the port */
9fa1b3b1 1715 spin_unlock_irqrestore(&card->card_lock, flags);
e936ffd5 1716 cy_wait_until_sent(port->tty, info->timeout);
9fa1b3b1 1717 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 1718 }
1719 } else {
1720#ifdef Z_WAKE
15ed6cc0
AC		 1721 /* Waiting for on-board buffers to be empty before closing
1722 the port */
f0eefdc3 1723 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
02f1175c
JS		 1724 int retval;
1725
f0eefdc3 1726 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
9fa1b3b1 1727 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 1728 if (retval != 0) {
21719191
JS		 1729 printk(KERN_DEBUG "cyc:cy_close retval on "
1730 "ttyC%d was %x\n", info->line, retval);
02f1175c 1731 }
9fa1b3b1 1732 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 1733 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 1734 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 1735 }
1da177e4 1736#endif
02f1175c 1737 }
9fa1b3b1 1738 spin_unlock_irqrestore(&card->card_lock, flags);
e936ffd5
AC		 1739 cy_shutdown(info, port->tty);
1740}
1da177e4 1741
e936ffd5
AC		 1742/*
1743 * This routine is called when a particular tty device is closed.
1744 */
1745static void cy_close(struct tty_struct *tty, struct file *filp)
1746{
1747 struct cyclades_port *info = tty->driver_data;
1748 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1749 return;
1750 tty_port_close(&info->port, tty, filp);
02f1175c 1751} /* cy_close */
1da177e4
LT		 1752
1753/* This routine gets called when tty_write has put something into
1754 * the write_queue. The characters may come from user space or
1755 * kernel space.
1756 *
1757 * This routine will return the number of characters actually
1758 * accepted for writing.
1759 *
1760 * If the port is not already transmitting stuff, start it off by
1761 * enabling interrupts. The interrupt service routine will then
1762 * ensure that the characters are sent.
1763 * If the port is already active, there is no need to kick it.
1764 *
1765 */
02f1175c 1766static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 1767{
cab9bdd1 1768 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1769 unsigned long flags;
1770 int c, ret = 0;
1da177e4
LT		 1771
1772#ifdef CY_DEBUG_IO
21719191 1773 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 1774#endif
1775
15ed6cc0 1776 if (serial_paranoia_check(info, tty->name, "cy_write"))
02f1175c 1777 return 0;
1da177e4 1778
77451e53 1779 if (!info->port.xmit_buf)
02f1175c 1780 return 0;
1da177e4 1781
9fa1b3b1 1782 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 1783 while (1) {
1a4e2351
HH		 1784 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1785 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
02f1175c
JS		 1786
1787 if (c <= 0)
1788 break;
1789
77451e53 1790 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
02f1175c
JS		 1791 info->xmit_head = (info->xmit_head + c) &
1792 (SERIAL_XMIT_SIZE - 1);
1793 info->xmit_cnt += c;
1794 buf += c;
1795 count -= c;
1796 ret += c;
1797 }
9fa1b3b1 1798 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 1799
1800 info->idle_stats.xmit_bytes += ret;
1801 info->idle_stats.xmit_idle = jiffies;
1802
15ed6cc0 1803 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
02f1175c 1804 start_xmit(info);
15ed6cc0 1805
02f1175c
JS		 1806 return ret;
1807} /* cy_write */
1da177e4
LT		 1808
1809/*
1810 * This routine is called by the kernel to write a single
1811 * character to the tty device. If the kernel uses this routine,
1812 * it must call the flush_chars() routine (if defined) when it is
1813 * done stuffing characters into the driver. If there is no room
1814 * in the queue, the character is ignored.
1815 */
76b25a55 1816static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 1817{
cab9bdd1 1818 struct cyclades_port *info = tty->driver_data;
02f1175c 1819 unsigned long flags;
1da177e4
LT		 1820
1821#ifdef CY_DEBUG_IO
21719191 1822 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 1823#endif
1824
02f1175c 1825 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
76b25a55 1826 return 0;
1da177e4 1827
77451e53 1828 if (!info->port.xmit_buf)
76b25a55 1829 return 0;
1da177e4 1830
9fa1b3b1 1831 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 1832 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 1833 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 1834 return 0;
02f1175c 1835 }
1da177e4 1836
77451e53 1837 info->port.xmit_buf[info->xmit_head++] = ch;
02f1175c
JS		 1838 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1839 info->xmit_cnt++;
1da177e4
LT		 1840 info->idle_stats.xmit_bytes++;
1841 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 1842 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 1843 return 1;
02f1175c 1844} /* cy_put_char */
1da177e4
LT		 1845
1846/*
1847 * This routine is called by the kernel after it has written a
15ed6cc0 1848 * series of characters to the tty device using put_char().
1da177e4 1849 */
02f1175c 1850static void cy_flush_chars(struct tty_struct *tty)
1da177e4 1851{
cab9bdd1 1852 struct cyclades_port *info = tty->driver_data;
02f1175c 1853
1da177e4 1854#ifdef CY_DEBUG_IO
21719191 1855 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 1856#endif
1857
02f1175c
JS		 1858 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1859 return;
1da177e4 1860
02f1175c 1861 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
77451e53 1862 !info->port.xmit_buf)
02f1175c 1863 return;
1da177e4 1864
02f1175c
JS		 1865 start_xmit(info);
1866} /* cy_flush_chars */
1da177e4
LT		 1867
1868/*
1869 * This routine returns the numbers of characters the tty driver
1870 * will accept for queuing to be written. This number is subject
1871 * to change as output buffers get emptied, or if the output flow
1872 * control is activated.
1873 */
02f1175c 1874static int cy_write_room(struct tty_struct *tty)
1da177e4 1875{
cab9bdd1 1876 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1877 int ret;
1878
1da177e4 1879#ifdef CY_DEBUG_IO
21719191 1880 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 1881#endif
1882
02f1175c
JS		 1883 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1884 return 0;
1885 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1886 if (ret < 0)
1887 ret = 0;
1888 return ret;
1889} /* cy_write_room */
1da177e4 1890
02f1175c 1891static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 1892{
cab9bdd1 1893 struct cyclades_port *info = tty->driver_data;
1da177e4 1894
02f1175c
JS		 1895 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1896 return 0;
1897
1da177e4 1898#ifdef Z_EXT_CHARS_IN_BUFFER
f0eefdc3 1899 if (!cy_is_Z(info->card)) {
02f1175c 1900#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 1901#ifdef CY_DEBUG_IO
21719191
JS		 1902 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1903 info->line, info->xmit_cnt);
1da177e4 1904#endif
02f1175c 1905 return info->xmit_cnt;
1da177e4 1906#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 1907 } else {
f0eefdc3 1908 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
02f1175c 1909 int char_count;
ad39c300 1910 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 1911
db05c3b1
JS		 1912 tx_get = readl(&buf_ctrl->tx_get);
1913 tx_put = readl(&buf_ctrl->tx_put);
1914 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 1915 if (tx_put >= tx_get)
1916 char_count = tx_put - tx_get;
1917 else
1918 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 1919#ifdef CY_DEBUG_IO
21719191
JS		 1920 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1921 info->line, info->xmit_cnt + char_count);
1da177e4 1922#endif
096dcfce 1923 return info->xmit_cnt + char_count;
02f1175c
JS		 1924 }
1925#endif /* Z_EXT_CHARS_IN_BUFFER */
1926} /* cy_chars_in_buffer */
1da177e4
LT		 1927
1928/*
1929 * ------------------------------------------------------------
1930 * cy_ioctl() and friends
1931 * ------------------------------------------------------------
1932 */
1933
1a86b5e3 1934static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 1935{
02f1175c 1936 int co, co_val, bpr;
1a86b5e3 1937 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 1938 25000000);
1da177e4 1939
02f1175c
JS		 1940 if (baud == 0) {
1941 info->tbpr = info->tco = info->rbpr = info->rco = 0;
1942 return;
1943 }
1da177e4 1944
02f1175c
JS		 1945 /* determine which prescaler to use */
1946 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
1947 if (cy_clock / co_val / baud > 63)
1948 break;
1949 }
1da177e4 1950
02f1175c
JS		 1951 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
1952 if (bpr > 255)
1953 bpr = 255;
1da177e4 1954
02f1175c
JS		 1955 info->tbpr = info->rbpr = bpr;
1956 info->tco = info->rco = co;
1da177e4
LT		 1957}
1958
1959/*
1960 * This routine finds or computes the various line characteristics.
1961 * It used to be called config_setup
1962 */
d13549f8 1963static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1964{
875b206b 1965 struct cyclades_card *card;
02f1175c 1966 unsigned long flags;
3aeea5b9 1967 int channel;
02f1175c 1968 unsigned cflag, iflag;
02f1175c
JS		 1969 int baud, baud_rate = 0;
1970 int i;
1971
15ed6cc0 1972 if (info->line == -1)
02f1175c 1973 return;
15ed6cc0 1974
adc8d746
AC		 1975 cflag = tty->termios.c_cflag;
1976 iflag = tty->termios.c_iflag;
1da177e4 1977
02f1175c 1978 card = info->card;
875b206b 1979 channel = info->line - card->first_line;
02f1175c 1980
2693f485 1981 if (!cy_is_Z(card)) {
46fb7825
JS		 1982 u32 cflags;
1983
02f1175c 1984 /* baud rate */
d13549f8 1985 baud = tty_get_baud_rate(tty);
77451e53 1986 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 1987 ASYNC_SPD_CUST) {
1988 if (info->custom_divisor)
1989 baud_rate = info->baud / info->custom_divisor;
1990 else
1991 baud_rate = info->baud;
1992 } else if (baud > CD1400_MAX_SPEED) {
1993 baud = CD1400_MAX_SPEED;
1994 }
1995 /* find the baud index */
1996 for (i = 0; i < 20; i++) {
15ed6cc0 1997 if (baud == baud_table[i])
02f1175c 1998 break;
02f1175c 1999 }
15ed6cc0 2000 if (i == 20)
02f1175c 2001 i = 19; /* CD1400_MAX_SPEED */
02f1175c 2002
77451e53 2003 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2004 ASYNC_SPD_CUST) {
2005 cyy_baud_calc(info, baud_rate);
2006 } else {
2007 if (info->chip_rev >= CD1400_REV_J) {
2008 /* It is a CD1400 rev. J or later */
2009 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2010 info->tco = baud_co_60[i]; /* Tx CO */
2011 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2012 info->rco = baud_co_60[i]; /* Rx CO */
2013 } else {
2014 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2015 info->tco = baud_co_25[i]; /* Tx CO */
2016 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2017 info->rco = baud_co_25[i]; /* Rx CO */
2018 }
2019 }
2020 if (baud_table[i] == 134) {
2021 /* get it right for 134.5 baud */
2022 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2023 2;
77451e53 2024 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2025 ASYNC_SPD_CUST) {
2026 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2027 baud_rate) + 2;
2028 } else if (baud_table[i]) {
2029 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2030 baud_table[i]) + 2;
2031 /* this needs to be propagated into the card info */
2032 } else {
2033 info->timeout = 0;
2034 }
2035 /* By tradition (is it a standard?) a baud rate of zero
2036 implies the line should be/has been closed. A bit
2037 later in this routine such a test is performed. */
2038
2039 /* byte size and parity */
2040 info->cor5 = 0;
2041 info->cor4 = 0;
2042 /* receive threshold */
2043 info->cor3 = (info->default_threshold ?
2044 info->default_threshold : baud_cor3[i]);
2045 info->cor2 = CyETC;
2046 switch (cflag & CSIZE) {
2047 case CS5:
2048 info->cor1 = Cy_5_BITS;
2049 break;
2050 case CS6:
2051 info->cor1 = Cy_6_BITS;
2052 break;
2053 case CS7:
2054 info->cor1 = Cy_7_BITS;
2055 break;
2056 case CS8:
2057 info->cor1 = Cy_8_BITS;
2058 break;
2059 }
15ed6cc0 2060 if (cflag & CSTOPB)
02f1175c 2061 info->cor1 |= Cy_2_STOP;
15ed6cc0 2062
02f1175c 2063 if (cflag & PARENB) {
15ed6cc0 2064 if (cflag & PARODD)
02f1175c 2065 info->cor1 |= CyPARITY_O;
15ed6cc0 2066 else
02f1175c 2067 info->cor1 |= CyPARITY_E;
15ed6cc0 2068 } else
02f1175c 2069 info->cor1 |= CyPARITY_NONE;
02f1175c
JS		 2070
2071 /* CTS flow control flag */
5604a98e
PH		 2072 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
2073 if (cflag & CRTSCTS)
02f1175c 2074 info->cor2 |= CyCtsAE;
5604a98e 2075 else
02f1175c 2076 info->cor2 &= ~CyCtsAE;
2d68655d 2077 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
1da177e4
LT		 2078
2079 /***********************************************
2080 The hardware option, CyRtsAO, presents RTS when
2081 the chip has characters to send. Since most modems
2082 use RTS as reverse (inbound) flow control, this
2083 option is not used. If inbound flow control is
2084 necessary, DTR can be programmed to provide the
2085 appropriate signals for use with a non-standard
2086 cable. Contact Marcio Saito for details.
2087 ***********************************************/
2088
02f1175c 2089 channel &= 0x03;
1da177e4 2090
9fa1b3b1 2091 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2092 cyy_writeb(info, CyCAR, channel);
02f1175c
JS		 2093
2094 /* tx and rx baud rate */
2095
3aeea5b9
JS		 2096 cyy_writeb(info, CyTCOR, info->tco);
2097 cyy_writeb(info, CyTBPR, info->tbpr);
2098 cyy_writeb(info, CyRCOR, info->rco);
2099 cyy_writeb(info, CyRBPR, info->rbpr);
02f1175c
JS		 2100
2101 /* set line characteristics according configuration */
2102
3aeea5b9
JS		 2103 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2104 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2105 cyy_writeb(info, CyCOR1, info->cor1);
2106 cyy_writeb(info, CyCOR2, info->cor2);
2107 cyy_writeb(info, CyCOR3, info->cor3);
2108 cyy_writeb(info, CyCOR4, info->cor4);
2109 cyy_writeb(info, CyCOR5, info->cor5);
02f1175c 2110
3aeea5b9
JS		 2111 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2112 CyCOR3ch);
02f1175c 2113
15ed6cc0 2114 /* !!! Is this needed? */
3aeea5b9
JS		 2115 cyy_writeb(info, CyCAR, channel);
2116 cyy_writeb(info, CyRTPR,
02f1175c
JS		 2117 (info->default_timeout ? info->default_timeout : 0x02));
2118 /* 10ms rx timeout */
2119
46fb7825
JS		 2120 cflags = CyCTS;
2121 if (!C_CLOCAL(tty))
2122 cflags |= CyDSR | CyRI | CyDCD;
2123 /* without modem intr */
2124 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2125 /* act on 1->0 modem transitions */
2126 if ((cflag & CRTSCTS) && info->rflow)
2127 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2128 else
2129 cyy_writeb(info, CyMCOR1, cflags);
2130 /* act on 0->1 modem transitions */
2131 cyy_writeb(info, CyMCOR2, cflags);
02f1175c 2132
4d768200
JS		 2133 if (i == 0) /* baud rate is zero, turn off line */
2134 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2135 else
2136 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
1da177e4 2137
d13549f8 2138 clear_bit(TTY_IO_ERROR, &tty->flags);
9fa1b3b1 2139 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2140
1da177e4 2141 } else {
f0eefdc3 2142 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1a86b5e3 2143 __u32 sw_flow;
02f1175c 2144 int retval;
1da177e4 2145
2693f485 2146 if (!cyz_is_loaded(card))
02f1175c 2147 return;
1da177e4 2148
02f1175c 2149 /* baud rate */
d13549f8 2150 baud = tty_get_baud_rate(tty);
77451e53 2151 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2152 ASYNC_SPD_CUST) {
2153 if (info->custom_divisor)
2154 baud_rate = info->baud / info->custom_divisor;
2155 else
2156 baud_rate = info->baud;
2157 } else if (baud > CYZ_MAX_SPEED) {
2158 baud = CYZ_MAX_SPEED;
2159 }
2160 cy_writel(&ch_ctrl->comm_baud, baud);
2161
2162 if (baud == 134) {
2163 /* get it right for 134.5 baud */
2164 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2165 2;
77451e53 2166 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2167 ASYNC_SPD_CUST) {
2168 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2169 baud_rate) + 2;
2170 } else if (baud) {
2171 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2172 baud) + 2;
2173 /* this needs to be propagated into the card info */
2174 } else {
2175 info->timeout = 0;
2176 }
1da177e4 2177
02f1175c
JS		 2178 /* byte size and parity */
2179 switch (cflag & CSIZE) {
2180 case CS5:
2181 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2182 break;
2183 case CS6:
2184 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2185 break;
2186 case CS7:
2187 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2188 break;
2189 case CS8:
2190 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2191 break;
2192 }
2193 if (cflag & CSTOPB) {
2194 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 2195 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 2196 } else {
2197 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 2198 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 2199 }
2200 if (cflag & PARENB) {
15ed6cc0 2201 if (cflag & PARODD)
02f1175c 2202 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
15ed6cc0 2203 else
02f1175c 2204 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
15ed6cc0 2205 } else
02f1175c 2206 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
1da177e4 2207
02f1175c
JS		 2208 /* CTS flow control flag */
2209 if (cflag & CRTSCTS) {
2210 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 2211 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 2212 } else {
db05c3b1
JS		 2213 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2214 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 2215 }
2216 /* As the HW flow control is done in firmware, the driver
2217 doesn't need to care about it */
5604a98e 2218 tty_port_set_cts_flow(&info->port, 0);
02f1175c
JS		 2219
2220 /* XON/XOFF/XANY flow control flags */
2221 sw_flow = 0;
2222 if (iflag & IXON) {
2223 sw_flow |= C_FL_OXX;
2224 if (iflag & IXANY)
2225 sw_flow |= C_FL_OIXANY;
2226 }
2227 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2228
875b206b 2229 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 2230 if (retval != 0) {
21719191
JS		 2231 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2232 "was %x\n", info->line, retval);
02f1175c
JS		 2233 }
2234
2235 /* CD sensitivity */
2d68655d 2236 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
1da177e4 2237
02f1175c
JS		 2238 if (baud == 0) { /* baud rate is zero, turn off line */
2239 cy_writel(&ch_ctrl->rs_control,
db05c3b1 2240 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 2241#ifdef CY_DEBUG_DTR
21719191 2242 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 2243#endif
02f1175c
JS		 2244 } else {
2245 cy_writel(&ch_ctrl->rs_control,
db05c3b1 2246 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 2247#ifdef CY_DEBUG_DTR
21719191 2248 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 2249#endif
02f1175c 2250 }
1da177e4 2251
15ed6cc0 2252 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 2253 if (retval != 0) {
21719191
JS		 2254 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2255 "was %x\n", info->line, retval);
02f1175c 2256 }
1da177e4 2257
d13549f8 2258 clear_bit(TTY_IO_ERROR, &tty->flags);
1da177e4 2259 }
02f1175c 2260} /* set_line_char */
1da177e4 2261
6c28181c 2262static int cy_get_serial_info(struct cyclades_port *info,
15ed6cc0 2263 struct serial_struct __user *retinfo)
1da177e4 2264{
875b206b 2265 struct cyclades_card *cinfo = info->card;
6c28181c
JS		 2266 struct serial_struct tmp = {
2267 .type = info->type,
2268 .line = info->line,
2269 .port = (info->card - cy_card) * 0x100 + info->line -
2270 cinfo->first_line,
2271 .irq = cinfo->irq,
2272 .flags = info->port.flags,
2273 .close_delay = info->port.close_delay,
2274 .closing_wait = info->port.closing_wait,
2275 .baud_base = info->baud,
2276 .custom_divisor = info->custom_divisor,
6c28181c 2277 };
02f1175c 2278 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
6c28181c 2279}
1da177e4
LT		 2280
2281static int
d13549f8 2282cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
15ed6cc0 2283 struct serial_struct __user *new_info)
1da177e4 2284{
02f1175c 2285 struct serial_struct new_serial;
d1b8bc3b 2286 int old_flags;
25c3cdf8 2287 int ret;
02f1175c
JS		 2288
2289 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2290 return -EFAULT;
02f1175c 2291
25c3cdf8 2292 mutex_lock(&info->port.mutex);
d1b8bc3b
JH		 2293
2294 old_flags = info->port.flags;
2295
02f1175c 2296 if (!capable(CAP_SYS_ADMIN)) {
44b7d1b3 2297 if (new_serial.close_delay != info->port.close_delay ||
02f1175c
JS		 2298 new_serial.baud_base != info->baud ||
2299 (new_serial.flags & ASYNC_FLAGS &
2300 ~ASYNC_USR_MASK) !=
77451e53 2301 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
25c3cdf8
AC		 2302 {
2303 mutex_unlock(&info->port.mutex);
02f1175c 2304 return -EPERM;
25c3cdf8 2305 }
77451e53 2306 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
02f1175c
JS		 2307 (new_serial.flags & ASYNC_USR_MASK);
2308 info->baud = new_serial.baud_base;
2309 info->custom_divisor = new_serial.custom_divisor;
2310 goto check_and_exit;
2311 }
2312
2313 /*
2314 * OK, past this point, all the error checking has been done.
2315 * At this point, we start making changes.....
2316 */
2317
2318 info->baud = new_serial.baud_base;
2319 info->custom_divisor = new_serial.custom_divisor;
77451e53 2320 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
02f1175c 2321 (new_serial.flags & ASYNC_FLAGS);
44b7d1b3
AC		 2322 info->port.close_delay = new_serial.close_delay * HZ / 100;
2323 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 2324
2325check_and_exit:
d41861ca 2326 if (tty_port_initialized(&info->port)) {
d1b8bc3b
JH		 2327 if ((new_serial.flags ^ old_flags) & ASYNC_SPD_MASK) {
2328 /* warn about deprecation unless clearing */
2329 if (new_serial.flags & ASYNC_SPD_MASK)
2330 dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
2331 }
d13549f8 2332 cy_set_line_char(info, tty);
25c3cdf8 2333 ret = 0;
02f1175c 2334 } else {
25c3cdf8 2335 ret = cy_startup(info, tty);
02f1175c 2336 }
25c3cdf8
AC		 2337 mutex_unlock(&info->port.mutex);
2338 return ret;
02f1175c 2339} /* set_serial_info */
1da177e4
LT		 2340
2341/*
2342 * get_lsr_info - get line status register info
2343 *
2344 * Purpose: Let user call ioctl() to get info when the UART physically
2345 * is emptied. On bus types like RS485, the transmitter must
2346 * release the bus after transmitting. This must be done when
2347 * the transmit shift register is empty, not be done when the
2348 * transmit holding register is empty. This functionality
2349 * allows an RS485 driver to be written in user space.
2350 */
15ed6cc0 2351static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
1da177e4 2352{
3aeea5b9 2353 struct cyclades_card *card = info->card;
02f1175c
JS		 2354 unsigned int result;
2355 unsigned long flags;
3aeea5b9 2356 u8 status;
1da177e4 2357
2693f485 2358 if (!cy_is_Z(card)) {
9fa1b3b1 2359 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2360 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
9fa1b3b1 2361 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2362 result = (status ? 0 : TIOCSER_TEMT);
2363 } else {
2364 /* Not supported yet */
2365 return -EINVAL;
2366 }
dbca36ea 2367 return put_user(result, value);
1da177e4
LT		 2368}
2369
60b33c13 2370static int cy_tiocmget(struct tty_struct *tty)
1da177e4 2371{
cab9bdd1 2372 struct cyclades_port *info = tty->driver_data;
875b206b 2373 struct cyclades_card *card;
3aeea5b9 2374 int result;
02f1175c 2375
bf9d8929 2376 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c 2377 return -ENODEV;
1da177e4 2378
02f1175c 2379 card = info->card;
0d348729 2380
2693f485 2381 if (!cy_is_Z(card)) {
0d348729 2382 unsigned long flags;
3aeea5b9
JS		 2383 int channel = info->line - card->first_line;
2384 u8 status;
1da177e4 2385
9fa1b3b1 2386 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 2387 cyy_writeb(info, CyCAR, channel & 0x03);
2388 status = cyy_readb(info, CyMSVR1);
2389 status |= cyy_readb(info, CyMSVR2);
9fa1b3b1 2390 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2391
2392 if (info->rtsdtr_inv) {
2393 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2394 ((status & CyDTR) ? TIOCM_RTS : 0);
2395 } else {
2396 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2397 ((status & CyDTR) ? TIOCM_DTR : 0);
2398 }
2399 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2400 ((status & CyRI) ? TIOCM_RNG : 0) |
2401 ((status & CyDSR) ? TIOCM_DSR : 0) |
2402 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 2403 } else {
0d348729
JS		 2404 u32 lstatus;
2405
2406 if (!cyz_is_loaded(card)) {
2407 result = -ENODEV;
2408 goto end;
02f1175c 2409 }
1da177e4 2410
0d348729
JS		 2411 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2412 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2413 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2414 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2415 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2416 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2417 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
02f1175c 2418 }
0d348729 2419end:
02f1175c
JS		 2420 return result;
2421} /* cy_tiomget */
1da177e4
LT		 2422
2423static int
20b9d177 2424cy_tiocmset(struct tty_struct *tty,
02f1175c 2425 unsigned int set, unsigned int clear)
1da177e4 2426{
cab9bdd1 2427 struct cyclades_port *info = tty->driver_data;
875b206b 2428 struct cyclades_card *card;
02f1175c 2429 unsigned long flags;
02f1175c 2430
bf9d8929 2431 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c
JS		 2432 return -ENODEV;
2433
2434 card = info->card;
2693f485 2435 if (!cy_is_Z(card)) {
4d768200
JS		 2436 spin_lock_irqsave(&card->card_lock, flags);
2437 cyy_change_rts_dtr(info, set, clear);
2438 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2439 } else {
0d348729
JS		 2440 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2441 int retval, channel = info->line - card->first_line;
2442 u32 rs;
2443
2444 if (!cyz_is_loaded(card))
2445 return -ENODEV;
2446
2447 spin_lock_irqsave(&card->card_lock, flags);
2448 rs = readl(&ch_ctrl->rs_control);
2449 if (set & TIOCM_RTS)
2450 rs |= C_RS_RTS;
2451 if (clear & TIOCM_RTS)
2452 rs &= ~C_RS_RTS;
2453 if (set & TIOCM_DTR) {
2454 rs |= C_RS_DTR;
1da177e4 2455#ifdef CY_DEBUG_DTR
0d348729 2456 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
1da177e4 2457#endif
0d348729
JS		 2458 }
2459 if (clear & TIOCM_DTR) {
2460 rs &= ~C_RS_DTR;
1da177e4 2461#ifdef CY_DEBUG_DTR
0d348729
JS		 2462 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2463 "Z DTR\n");
1da177e4 2464#endif
02f1175c 2465 }
0d348729 2466 cy_writel(&ch_ctrl->rs_control, rs);
9fa1b3b1 2467 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
0d348729 2468 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2469 if (retval != 0) {
21719191
JS		 2470 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2471 "was %x\n", info->line, retval);
02f1175c 2472 }
1da177e4 2473 }
02f1175c 2474 return 0;
0d348729 2475}
1da177e4
LT		 2476
2477/*
2478 * cy_break() --- routine which turns the break handling on or off
2479 */
9e98966c 2480static int cy_break(struct tty_struct *tty, int break_state)
1da177e4 2481{
cab9bdd1 2482 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2483 struct cyclades_card *card;
02f1175c 2484 unsigned long flags;
9e98966c 2485 int retval = 0;
1da177e4 2486
02f1175c 2487 if (serial_paranoia_check(info, tty->name, "cy_break"))
9e98966c 2488 return -EINVAL;
1da177e4 2489
9fa1b3b1
JS		 2490 card = info->card;
2491
2492 spin_lock_irqsave(&card->card_lock, flags);
2693f485 2493 if (!cy_is_Z(card)) {
02f1175c
JS		 2494 /* Let the transmit ISR take care of this (since it
2495 requires stuffing characters into the output stream).
2496 */
2497 if (break_state == -1) {
2498 if (!info->breakon) {
2499 info->breakon = 1;
2500 if (!info->xmit_cnt) {
9fa1b3b1 2501 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2502 start_xmit(info);
9fa1b3b1 2503 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2504 }
2505 }
2506 } else {
2507 if (!info->breakoff) {
2508 info->breakoff = 1;
2509 if (!info->xmit_cnt) {
9fa1b3b1 2510 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2511 start_xmit(info);
9fa1b3b1 2512 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2513 }
2514 }
1da177e4 2515 }
1da177e4 2516 } else {
02f1175c 2517 if (break_state == -1) {
9fa1b3b1
JS		 2518 retval = cyz_issue_cmd(card,
2519 info->line - card->first_line,
02f1175c
JS		 2520 C_CM_SET_BREAK, 0L);
2521 if (retval != 0) {
21719191
JS		 2522 printk(KERN_ERR "cyc:cy_break (set) retval on "
2523 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 2524 }
2525 } else {
9fa1b3b1
JS		 2526 retval = cyz_issue_cmd(card,
2527 info->line - card->first_line,
02f1175c
JS		 2528 C_CM_CLR_BREAK, 0L);
2529 if (retval != 0) {
21719191
JS		 2530 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2531 "on ttyC%d was %x\n", info->line,
2532 retval);
02f1175c 2533 }
1da177e4 2534 }
1da177e4 2535 }
9fa1b3b1 2536 spin_unlock_irqrestore(&card->card_lock, flags);
9e98966c 2537 return retval;
02f1175c 2538} /* cy_break */
1da177e4 2539
02f1175c 2540static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 2541{
3aeea5b9 2542 struct cyclades_card *card = info->card;
02f1175c 2543 unsigned long flags;
1da177e4 2544
2693f485 2545 if (!cy_is_Z(card)) {
02f1175c
JS		 2546 info->cor3 &= ~CyREC_FIFO;
2547 info->cor3 |= value & CyREC_FIFO;
1da177e4 2548
9fa1b3b1 2549 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 2550 cyy_writeb(info, CyCOR3, info->cor3);
2551 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
9fa1b3b1 2552 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2553 }
2554 return 0;
2555} /* set_threshold */
1da177e4 2556
15ed6cc0
AC		 2557static int get_threshold(struct cyclades_port *info,
2558 unsigned long __user *value)
1da177e4 2559{
3aeea5b9 2560 struct cyclades_card *card = info->card;
1da177e4 2561
2693f485 2562 if (!cy_is_Z(card)) {
3aeea5b9 2563 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
02f1175c 2564 return put_user(tmp, value);
02f1175c 2565 }
f7429034 2566 return 0;
02f1175c 2567} /* get_threshold */
1da177e4 2568
02f1175c 2569static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 2570{
3aeea5b9 2571 struct cyclades_card *card = info->card;
02f1175c 2572 unsigned long flags;
1da177e4 2573
2693f485 2574 if (!cy_is_Z(card)) {
9fa1b3b1 2575 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2576 cyy_writeb(info, CyRTPR, value & 0xff);
9fa1b3b1 2577 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2578 }
2579 return 0;
2580} /* set_timeout */
1da177e4 2581
15ed6cc0
AC		 2582static int get_timeout(struct cyclades_port *info,
2583 unsigned long __user *value)
1da177e4 2584{
3aeea5b9 2585 struct cyclades_card *card = info->card;
1da177e4 2586
2693f485 2587 if (!cy_is_Z(card)) {
3aeea5b9 2588 u8 tmp = cyy_readb(info, CyRTPR);
02f1175c 2589 return put_user(tmp, value);
02f1175c 2590 }
f7429034 2591 return 0;
02f1175c 2592} /* get_timeout */
1da177e4 2593
6c28181c
JS		 2594static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2595 struct cyclades_icount *cprev)
1da177e4 2596{
6c28181c
JS		 2597 struct cyclades_icount cnow;
2598 unsigned long flags;
2599 int ret;
1da177e4 2600
6c28181c
JS		 2601 spin_lock_irqsave(&info->card->card_lock, flags);
2602 cnow = info->icount; /* atomic copy */
2603 spin_unlock_irqrestore(&info->card->card_lock, flags);
2604
2605 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2606 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2607 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2608 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2609
2610 *cprev = cnow;
2611
2612 return ret;
2613}
1da177e4
LT		 2614
2615/*
2616 * This routine allows the tty driver to implement device-
2617 * specific ioctl's. If the ioctl number passed in cmd is
2618 * not recognized by the driver, it should return ENOIOCTLCMD.
2619 */
2620static int
6caa76b7 2621cy_ioctl(struct tty_struct *tty,
02f1175c 2622 unsigned int cmd, unsigned long arg)
1da177e4 2623{
cab9bdd1 2624 struct cyclades_port *info = tty->driver_data;
6c28181c 2625 struct cyclades_icount cnow; /* kernel counter temps */
02f1175c
JS		 2626 int ret_val = 0;
2627 unsigned long flags;
2628 void __user *argp = (void __user *)arg;
2629
2630 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2631 return -ENODEV;
1da177e4
LT		 2632
2633#ifdef CY_DEBUG_OTHER
21719191
JS		 2634 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2635 info->line, cmd, arg);
1da177e4
LT		 2636#endif
2637
02f1175c
JS		 2638 switch (cmd) {
2639 case CYGETMON:
6c28181c
JS		 2640 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2641 ret_val = -EFAULT;
2642 break;
2643 }
2644 memset(&info->mon, 0, sizeof(info->mon));
02f1175c
JS		 2645 break;
2646 case CYGETTHRESH:
2647 ret_val = get_threshold(info, argp);
2648 break;
2649 case CYSETTHRESH:
2650 ret_val = set_threshold(info, arg);
2651 break;
2652 case CYGETDEFTHRESH:
6c28181c
JS		 2653 ret_val = put_user(info->default_threshold,
2654 (unsigned long __user *)argp);
02f1175c
JS		 2655 break;
2656 case CYSETDEFTHRESH:
6c28181c 2657 info->default_threshold = arg & 0x0f;
02f1175c
JS		 2658 break;
2659 case CYGETTIMEOUT:
2660 ret_val = get_timeout(info, argp);
2661 break;
2662 case CYSETTIMEOUT:
2663 ret_val = set_timeout(info, arg);
2664 break;
2665 case CYGETDEFTIMEOUT:
6c28181c
JS		 2666 ret_val = put_user(info->default_timeout,
2667 (unsigned long __user *)argp);
02f1175c
JS		 2668 break;
2669 case CYSETDEFTIMEOUT:
6c28181c 2670 info->default_timeout = arg & 0xff;
02f1175c 2671 break;
1da177e4 2672 case CYSETRFLOW:
02f1175c 2673 info->rflow = (int)arg;
02f1175c 2674 break;
1da177e4 2675 case CYGETRFLOW:
02f1175c
JS		 2676 ret_val = info->rflow;
2677 break;
1da177e4 2678 case CYSETRTSDTR_INV:
02f1175c 2679 info->rtsdtr_inv = (int)arg;
02f1175c 2680 break;
1da177e4 2681 case CYGETRTSDTR_INV:
02f1175c
JS		 2682 ret_val = info->rtsdtr_inv;
2683 break;
1da177e4 2684 case CYGETCD1400VER:
02f1175c
JS		 2685 ret_val = info->chip_rev;
2686 break;
1da177e4
LT		 2687#ifndef CONFIG_CYZ_INTR
2688 case CYZSETPOLLCYCLE:
351d6204
QX		 2689 if (arg > LONG_MAX / HZ)
2690 return -ENODEV;
02f1175c 2691 cyz_polling_cycle = (arg * HZ) / 1000;
02f1175c 2692 break;
1da177e4 2693 case CYZGETPOLLCYCLE:
02f1175c
JS		 2694 ret_val = (cyz_polling_cycle * 1000) / HZ;
2695 break;
2696#endif /* CONFIG_CYZ_INTR */
1da177e4 2697 case CYSETWAIT:
44b7d1b3 2698 info->port.closing_wait = (unsigned short)arg * HZ / 100;
02f1175c 2699 break;
1da177e4 2700 case CYGETWAIT:
44b7d1b3 2701 ret_val = info->port.closing_wait / (HZ / 100);
02f1175c
JS		 2702 break;
2703 case TIOCGSERIAL:
6c28181c 2704 ret_val = cy_get_serial_info(info, argp);
02f1175c
JS		 2705 break;
2706 case TIOCSSERIAL:
d13549f8 2707 ret_val = cy_set_serial_info(info, tty, argp);
02f1175c
JS		 2708 break;
2709 case TIOCSERGETLSR: /* Get line status register */
2710 ret_val = get_lsr_info(info, argp);
2711 break;
2712 /*
2713 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2714 * - mask passed in arg for lines of interest
2715 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2716 * Caller should use TIOCGICOUNT to see which one it was
2717 */
1da177e4 2718 case TIOCMIWAIT:
9fa1b3b1 2719 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2720 /* note the counters on entry */
2c7fea99 2721 cnow = info->icount;
9fa1b3b1 2722 spin_unlock_irqrestore(&info->card->card_lock, flags);
bdc04e31 2723 ret_val = wait_event_interruptible(info->port.delta_msr_wait,
6c28181c 2724 cy_cflags_changed(info, arg, &cnow));
2c7fea99 2725 break;
1da177e4 2726
02f1175c
JS		 2727 /*
2728 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2729 * Return: write counters to the user passed counter struct
2730 * NB: both 1->0 and 0->1 transitions are counted except for
2731 * RI where only 0->1 is counted.
2732 */
02f1175c
JS		 2733 default:
2734 ret_val = -ENOIOCTLCMD;
2735 }
1da177e4
LT		 2736
2737#ifdef CY_DEBUG_OTHER
21719191 2738 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4 2739#endif
02f1175c
JS		 2740 return ret_val;
2741} /* cy_ioctl */
1da177e4 2742
0587102c
AC		 2743static int cy_get_icount(struct tty_struct *tty,
2744 struct serial_icounter_struct *sic)
2745{
2746 struct cyclades_port *info = tty->driver_data;
2747 struct cyclades_icount cnow; /* Used to snapshot */
2748 unsigned long flags;
2749
2750 spin_lock_irqsave(&info->card->card_lock, flags);
2751 cnow = info->icount;
2752 spin_unlock_irqrestore(&info->card->card_lock, flags);
2753
2754 sic->cts = cnow.cts;
2755 sic->dsr = cnow.dsr;
2756 sic->rng = cnow.rng;
2757 sic->dcd = cnow.dcd;
2758 sic->rx = cnow.rx;
2759 sic->tx = cnow.tx;
2760 sic->frame = cnow.frame;
2761 sic->overrun = cnow.overrun;
2762 sic->parity = cnow.parity;
2763 sic->brk = cnow.brk;
2764 sic->buf_overrun = cnow.buf_overrun;
2765 return 0;
2766}
2767
1da177e4
LT		 2768/*
2769 * This routine allows the tty driver to be notified when
2770 * device's termios settings have changed. Note that a
2771 * well-designed tty driver should be prepared to accept the case
2772 * where old == NULL, and try to do something rational.
2773 */
02f1175c 2774static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 2775{
cab9bdd1 2776 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 2777
2778#ifdef CY_DEBUG_OTHER
21719191 2779 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 2780#endif
2781
d13549f8 2782 cy_set_line_char(info, tty);
02f1175c 2783
9db276f8 2784 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
02f1175c
JS		 2785 tty->hw_stopped = 0;
2786 cy_start(tty);
2787 }
1da177e4 2788#if 0
02f1175c
JS		 2789 /*
2790 * No need to wake up processes in open wait, since they
2791 * sample the CLOCAL flag once, and don't recheck it.
2792 * XXX It's not clear whether the current behavior is correct
2793 * or not. Hence, this may change.....
2794 */
9db276f8 2795 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
77451e53 2796 wake_up_interruptible(&info->port.open_wait);
1da177e4 2797#endif
02f1175c 2798} /* cy_set_termios */
1da177e4
LT		 2799
2800/* This function is used to send a high-priority XON/XOFF character to
2801 the device.
2802*/
02f1175c 2803static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 2804{
cab9bdd1 2805 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 2806 struct cyclades_card *card;
2807 int channel;
1da177e4 2808
02f1175c 2809 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 2810 return;
2811
02f1175c 2812 info->x_char = ch;
1da177e4
LT		 2813
2814 if (ch)
02f1175c 2815 cy_start(tty);
1da177e4
LT		 2816
2817 card = info->card;
875b206b 2818 channel = info->line - card->first_line;
1da177e4 2819
2693f485 2820 if (cy_is_Z(card)) {
02f1175c 2821 if (ch == STOP_CHAR(tty))
875b206b 2822 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 2823 else if (ch == START_CHAR(tty))
875b206b 2824 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 2825 }
2826}
2827
2828/* This routine is called by the upper-layer tty layer to signal
2829 that incoming characters should be throttled because the input
2830 buffers are close to full.
2831 */
02f1175c 2832static void cy_throttle(struct tty_struct *tty)
1da177e4 2833{
cab9bdd1 2834 struct cyclades_port *info = tty->driver_data;
875b206b 2835 struct cyclades_card *card;
02f1175c 2836 unsigned long flags;
1da177e4
LT		 2837
2838#ifdef CY_DEBUG_THROTTLE
fdfb719e
PH		 2839 printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(tty),
2840 info->line);
1da177e4
LT		 2841#endif
2842
15ed6cc0 2843 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
02f1175c 2844 return;
02f1175c
JS		 2845
2846 card = info->card;
2847
2848 if (I_IXOFF(tty)) {
2693f485 2849 if (!cy_is_Z(card))
02f1175c
JS		 2850 cy_send_xchar(tty, STOP_CHAR(tty));
2851 else
2852 info->throttle = 1;
2853 }
1da177e4 2854
9db276f8 2855 if (C_CRTSCTS(tty)) {
2693f485 2856 if (!cy_is_Z(card)) {
9fa1b3b1 2857 spin_lock_irqsave(&card->card_lock, flags);
4d768200 2858 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
9fa1b3b1 2859 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2860 } else {
2861 info->throttle = 1;
2862 }
2863 }
02f1175c 2864} /* cy_throttle */
1da177e4
LT		 2865
2866/*
2867 * This routine notifies the tty driver that it should signal
2868 * that characters can now be sent to the tty without fear of
2869 * overrunning the input buffers of the line disciplines.
2870 */
02f1175c 2871static void cy_unthrottle(struct tty_struct *tty)
1da177e4 2872{
cab9bdd1 2873 struct cyclades_port *info = tty->driver_data;
875b206b 2874 struct cyclades_card *card;
02f1175c 2875 unsigned long flags;
1da177e4
LT		 2876
2877#ifdef CY_DEBUG_THROTTLE
fdfb719e
PH		 2878 printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n",
2879 tty_name(tty), info->line);
1da177e4
LT		 2880#endif
2881
15ed6cc0 2882 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
02f1175c 2883 return;
1da177e4 2884
02f1175c
JS		 2885 if (I_IXOFF(tty)) {
2886 if (info->x_char)
2887 info->x_char = 0;
2888 else
2889 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 2890 }
1da177e4 2891
9db276f8 2892 if (C_CRTSCTS(tty)) {
02f1175c 2893 card = info->card;
2693f485 2894 if (!cy_is_Z(card)) {
9fa1b3b1 2895 spin_lock_irqsave(&card->card_lock, flags);
4d768200 2896 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
9fa1b3b1 2897 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2898 } else {
2899 info->throttle = 0;
2900 }
2901 }
02f1175c 2902} /* cy_unthrottle */
1da177e4
LT		 2903
2904/* cy_start and cy_stop provide software output flow control as a
2905 function of XON/XOFF, software CTS, and other such stuff.
2906*/
02f1175c 2907static void cy_stop(struct tty_struct *tty)
1da177e4 2908{
02f1175c 2909 struct cyclades_card *cinfo;
cab9bdd1 2910 struct cyclades_port *info = tty->driver_data;
3aeea5b9 2911 int channel;
02f1175c 2912 unsigned long flags;
1da177e4
LT		 2913
2914#ifdef CY_DEBUG_OTHER
21719191 2915 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 2916#endif
2917
02f1175c
JS		 2918 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2919 return;
1da177e4 2920
875b206b 2921 cinfo = info->card;
02f1175c 2922 channel = info->line - cinfo->first_line;
2693f485 2923 if (!cy_is_Z(cinfo)) {
9fa1b3b1 2924 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 2925 cyy_writeb(info, CyCAR, channel & 0x03);
2926 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
9fa1b3b1 2927 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 2928 }
02f1175c 2929} /* cy_stop */
1da177e4 2930
02f1175c 2931static void cy_start(struct tty_struct *tty)
1da177e4 2932{
02f1175c 2933 struct cyclades_card *cinfo;
cab9bdd1 2934 struct cyclades_port *info = tty->driver_data;
3aeea5b9 2935 int channel;
02f1175c 2936 unsigned long flags;
1da177e4
LT		 2937
2938#ifdef CY_DEBUG_OTHER
21719191 2939 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 2940#endif
2941
02f1175c
JS		 2942 if (serial_paranoia_check(info, tty->name, "cy_start"))
2943 return;
1da177e4 2944
875b206b 2945 cinfo = info->card;
02f1175c 2946 channel = info->line - cinfo->first_line;
2693f485 2947 if (!cy_is_Z(cinfo)) {
9fa1b3b1 2948 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 2949 cyy_writeb(info, CyCAR, channel & 0x03);
2950 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
9fa1b3b1 2951 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 2952 }
02f1175c 2953} /* cy_start */
1da177e4 2954
1da177e4
LT		 2955/*
2956 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
2957 */
02f1175c 2958static void cy_hangup(struct tty_struct *tty)
1da177e4 2959{
cab9bdd1 2960 struct cyclades_port *info = tty->driver_data;
02f1175c 2961
1da177e4 2962#ifdef CY_DEBUG_OTHER
21719191 2963 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 2964#endif
2965
02f1175c
JS		 2966 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
2967 return;
1da177e4 2968
02f1175c 2969 cy_flush_buffer(tty);
d13549f8 2970 cy_shutdown(info, tty);
174e6fe0 2971 tty_port_hangup(&info->port);
02f1175c 2972} /* cy_hangup */
1da177e4 2973
f0737579
JS		 2974static int cyy_carrier_raised(struct tty_port *port)
2975{
2976 struct cyclades_port *info = container_of(port, struct cyclades_port,
2977 port);
2978 struct cyclades_card *cinfo = info->card;
f0737579
JS		 2979 unsigned long flags;
2980 int channel = info->line - cinfo->first_line;
f0737579
JS		 2981 u32 cd;
2982
f0737579 2983 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 2984 cyy_writeb(info, CyCAR, channel & 0x03);
2985 cd = cyy_readb(info, CyMSVR1) & CyDCD;
f0737579
JS		 2986 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2987
2988 return cd;
2989}
2990
2991static void cyy_dtr_rts(struct tty_port *port, int raise)
2992{
2993 struct cyclades_port *info = container_of(port, struct cyclades_port,
2994 port);
2995 struct cyclades_card *cinfo = info->card;
f0737579 2996 unsigned long flags;
f0737579
JS		 2997
2998 spin_lock_irqsave(&cinfo->card_lock, flags);
4d768200
JS		 2999 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
3000 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
f0737579
JS		 3001 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3002}
3003
3004static int cyz_carrier_raised(struct tty_port *port)
3005{
3006 struct cyclades_port *info = container_of(port, struct cyclades_port,
3007 port);
f0737579 3008
f0eefdc3 3009 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
f0737579
JS		 3010}
3011
3012static void cyz_dtr_rts(struct tty_port *port, int raise)
3013{
3014 struct cyclades_port *info = container_of(port, struct cyclades_port,
3015 port);
3016 struct cyclades_card *cinfo = info->card;
f0eefdc3 3017 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
f0737579
JS		 3018 int ret, channel = info->line - cinfo->first_line;
3019 u32 rs;
3020
f0eefdc3 3021 rs = readl(&ch_ctrl->rs_control);
f0737579
JS		 3022 if (raise)
3023 rs |= C_RS_RTS | C_RS_DTR;
3024 else
3025 rs &= ~(C_RS_RTS | C_RS_DTR);
f0eefdc3 3026 cy_writel(&ch_ctrl->rs_control, rs);
f0737579
JS		 3027 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3028 if (ret != 0)
3029 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3030 __func__, info->line, ret);
3031#ifdef CY_DEBUG_DTR
3032 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3033#endif
3034}
3035
3036static const struct tty_port_operations cyy_port_ops = {
3037 .carrier_raised = cyy_carrier_raised,
3038 .dtr_rts = cyy_dtr_rts,
e936ffd5 3039 .shutdown = cy_do_close,
f0737579
JS		 3040};
3041
3042static const struct tty_port_operations cyz_port_ops = {
3043 .carrier_raised = cyz_carrier_raised,
3044 .dtr_rts = cyz_dtr_rts,
e936ffd5 3045 .shutdown = cy_do_close,
f0737579
JS		 3046};
3047
1da177e4
LT		 3048/*
3049 * ---------------------------------------------------------------------
3050 * cy_init() and friends
3051 *
3052 * cy_init() is called at boot-time to initialize the serial driver.
3053 * ---------------------------------------------------------------------
3054 */
3055
9671f099 3056static int cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 3057{
3058 struct cyclades_port *info;
f0eefdc3 3059 unsigned int channel, port;
0809e267 3060
3046d50e 3061 spin_lock_init(&cinfo->card_lock);
963118ee 3062 cinfo->intr_enabled = 0;
3046d50e 3063
963118ee
JS		 3064 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3065 GFP_KERNEL);
dd025c0c
JS		 3066 if (cinfo->ports == NULL) {
3067 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3068 return -ENOMEM;
3069 }
3070
f0eefdc3
JS		 3071 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3072 channel++, port++) {
3073 info = &cinfo->ports[channel];
44b7d1b3 3074 tty_port_init(&info->port);
3046d50e 3075 info->magic = CYCLADES_MAGIC;
875b206b 3076 info->card = cinfo;
3046d50e 3077 info->line = port;
3046d50e 3078
44b7d1b3
AC		 3079 info->port.closing_wait = CLOSING_WAIT_DELAY;
3080 info->port.close_delay = 5 * HZ / 10;
2c7fea99 3081 init_completion(&info->shutdown_wait);
3046d50e 3082
2693f485 3083 if (cy_is_Z(cinfo)) {
f0eefdc3
JS		 3084 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3085 struct ZFW_CTRL *zfw_ctrl;
3086
f0737579 3087 info->port.ops = &cyz_port_ops;
0809e267 3088 info->type = PORT_STARTECH;
f0eefdc3
JS		 3089
3090 zfw_ctrl = cinfo->base_addr +
3091 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3092 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3093 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3094
101b8159 3095 if (cinfo->hw_ver == ZO_V1)
0809e267
JS		 3096 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3097 else
3046d50e 3098 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 3099#ifdef CONFIG_CYZ_INTR
3991428d
JS		 3100 setup_timer(&cyz_rx_full_timer[port],
3101 cyz_rx_restart, (unsigned long)info);
0809e267 3102#endif
3046d50e 3103 } else {
f0eefdc3 3104 unsigned short chip_number;
963118ee 3105 int index = cinfo->bus_index;
f0eefdc3 3106
f0737579 3107 info->port.ops = &cyy_port_ops;
0809e267 3108 info->type = PORT_CIRRUS;
0809e267 3109 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 3110 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 3111 info->cor2 = CyETC;
3112 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 3113
f0eefdc3 3114 chip_number = channel / CyPORTS_PER_CHIP;
3aeea5b9
JS		 3115 info->u.cyy.base_addr = cinfo->base_addr +
3116 (cy_chip_offset[chip_number] << index);
3117 info->chip_rev = cyy_readb(info, CyGFRCR);
15ed6cc0
AC		 3118
3119 if (info->chip_rev >= CD1400_REV_J) {
0809e267
JS		 3120 /* It is a CD1400 rev. J or later */
3121 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3122 info->tco = baud_co_60[13]; /* Tx CO */
3123 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3124 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 3125 info->rtsdtr_inv = 1;
3126 } else {
3127 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3128 info->tco = baud_co_25[13]; /* Tx CO */
3129 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3130 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 3131 info->rtsdtr_inv = 0;
3132 }
3046d50e
JS		 3133 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3134 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 3135 }
3046d50e 3136
0809e267 3137 }
3046d50e
JS		 3138
3139#ifndef CONFIG_CYZ_INTR
2693f485 3140 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3046d50e
JS		 3141 mod_timer(&cyz_timerlist, jiffies + 1);
3142#ifdef CY_PCI_DEBUG
3143 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3144#endif
3145 }
3146#endif
dd025c0c 3147 return 0;
0809e267
JS		 3148}
3149
1da177e4
LT		 3150/* initialize chips on Cyclom-Y card -- return number of valid
3151 chips (which is number of ports/4) */
9671f099 3152static unsigned short cyy_init_card(void __iomem *true_base_addr,
31b4f0a1 3153 int index)
1da177e4 3154{
02f1175c
JS		 3155 unsigned int chip_number;
3156 void __iomem *base_addr;
3157
3158 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3159 /* Cy_HwReset is 0x1400 */
3160 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3161 /* Cy_ClrIntr is 0x1800 */
3162 udelay(500L);
3163
15ed6cc0
AC		 3164 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3165 chip_number++) {
02f1175c
JS		 3166 base_addr =
3167 true_base_addr + (cy_chip_offset[chip_number] << index);
3168 mdelay(1);
db05c3b1 3169 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 3170 /*************
3171 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3172 chip_number, (unsigned long)base_addr);
3173 *************/
3174 return chip_number;
3175 }
3176
3177 cy_writeb(base_addr + (CyGFRCR << index), 0);
3178 udelay(10L);
3179
3180 /* The Cyclom-16Y does not decode address bit 9 and therefore
3181 cannot distinguish between references to chip 0 and a non-
3182 existent chip 4. If the preceding clearing of the supposed
3183 chip 4 GFRCR register appears at chip 0, there is no chip 4
3184 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3185 */
db05c3b1 3186 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 3187 (cy_chip_offset[0] << index) +
3188 (CyGFRCR << index)) == 0) {
3189 return chip_number;
3190 }
3191
3192 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3193 mdelay(1);
3194
db05c3b1 3195 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 3196 /*
3197 printk(" chip #%d at %#6lx is not responding ",
3198 chip_number, (unsigned long)base_addr);
3199 printk("(GFRCR stayed 0)\n",
3200 */
3201 return chip_number;
3202 }
db05c3b1 3203 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 3204 0x40) {
3205 /*
3206 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3207 "%#2x)\n",
3208 chip_number, (unsigned long)base_addr,
3209 base_addr[CyGFRCR<<index]);
3210 */
3211 return chip_number;
3212 }
3213 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 3214 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 3215 /* It is a CD1400 rev. J or later */
3216 /* Impossible to reach 5ms with this chip.
3217 Changed to 2ms instead (f = 500 Hz). */
3218 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3219 } else {
3220 /* f = 200 Hz */
3221 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3222 }
1da177e4 3223
02f1175c
JS		 3224 /*
3225 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3226 chip_number, (unsigned long)base_addr,
db05c3b1 3227 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 3228 */
3229 }
3230 return chip_number;
3231} /* cyy_init_card */
1da177e4
LT		 3232
3233/*
3234 * ---------------------------------------------------------------------
3235 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3236 * sets global variables and return the number of ISA boards found.
3237 * ---------------------------------------------------------------------
3238 */
02f1175c 3239static int __init cy_detect_isa(void)
1da177e4
LT		 3240{
3241#ifdef CONFIG_ISA
718c4ca1 3242 struct cyclades_card *card;
02f1175c
JS		 3243 unsigned short cy_isa_irq, nboard;
3244 void __iomem *cy_isa_address;
734cc178 3245 unsigned short i, j, k, cy_isa_nchan;
02f1175c 3246 int isparam = 0;
1da177e4 3247
02f1175c 3248 nboard = 0;
1da177e4 3249
1da177e4 3250 /* Check for module parameters */
02f1175c
JS		 3251 for (i = 0; i < NR_CARDS; i++) {
3252 if (maddr[i] || i) {
3253 isparam = 1;
3254 cy_isa_addresses[i] = maddr[i];
3255 }
3256 if (!maddr[i])
3257 break;
1da177e4 3258 }
1da177e4 3259
02f1175c
JS		 3260 /* scan the address table probing for Cyclom-Y/ISA boards */
3261 for (i = 0; i < NR_ISA_ADDRS; i++) {
3262 unsigned int isa_address = cy_isa_addresses[i];
15ed6cc0 3263 if (isa_address == 0x0000)
096dcfce 3264 return nboard;
1da177e4 3265
02f1175c 3266 /* probe for CD1400... */
cd989b3a 3267 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3137553d
JS		 3268 if (cy_isa_address == NULL) {
3269 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3270 "address\n");
3271 continue;
3272 }
02f1175c
JS		 3273 cy_isa_nchan = CyPORTS_PER_CHIP *
3274 cyy_init_card(cy_isa_address, 0);
3275 if (cy_isa_nchan == 0) {
3137553d 3276 iounmap(cy_isa_address);
02f1175c
JS		 3277 continue;
3278 }
20904363 3279
196b3167 3280 if (isparam && i < NR_CARDS && irq[i])
02f1175c 3281 cy_isa_irq = irq[i];
1da177e4 3282 else
02f1175c
JS		 3283 /* find out the board's irq by probing */
3284 cy_isa_irq = detect_isa_irq(cy_isa_address);
3285 if (cy_isa_irq == 0) {
21719191
JS		 3286 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3287 "IRQ could not be detected.\n",
02f1175c 3288 (unsigned long)cy_isa_address);
3137553d 3289 iounmap(cy_isa_address);
02f1175c
JS		 3290 continue;
3291 }
3292
3293 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 3294 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3295 "more channels are available. Change NR_PORTS "
3296 "in cyclades.c and recompile kernel.\n",
02f1175c 3297 (unsigned long)cy_isa_address);
3137553d 3298 iounmap(cy_isa_address);
096dcfce 3299 return nboard;
02f1175c
JS		 3300 }
3301 /* fill the next cy_card structure available */
3302 for (j = 0; j < NR_CARDS; j++) {
718c4ca1
JS		 3303 card = &cy_card[j];
3304 if (card->base_addr == NULL)
02f1175c
JS		 3305 break;
3306 }
3307 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 3308 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3309 "more cards can be used. Change NR_CARDS in "
3310 "cyclades.c and recompile kernel.\n",
02f1175c 3311 (unsigned long)cy_isa_address);
3137553d 3312 iounmap(cy_isa_address);
096dcfce 3313 return nboard;
02f1175c
JS		 3314 }
3315
3316 /* allocate IRQ */
3317 if (request_irq(cy_isa_irq, cyy_interrupt,
718c4ca1 3318 0, "Cyclom-Y", card)) {
21719191
JS		 3319 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3320 "could not allocate IRQ#%d.\n",
3321 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 3322 iounmap(cy_isa_address);
096dcfce 3323 return nboard;
02f1175c
JS		 3324 }
3325
3326 /* set cy_card */
718c4ca1
JS		 3327 card->base_addr = cy_isa_address;
3328 card->ctl_addr.p9050 = NULL;
3329 card->irq = (int)cy_isa_irq;
3330 card->bus_index = 0;
3331 card->first_line = cy_next_channel;
3332 card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3333 card->nports = cy_isa_nchan;
3334 if (cy_init_card(card)) {
3335 card->base_addr = NULL;
3336 free_irq(cy_isa_irq, card);
3137553d
JS		 3337 iounmap(cy_isa_address);
3338 continue;
3339 }
02f1175c
JS		 3340 nboard++;
3341
21719191
JS		 3342 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3343 "%d channels starting from port %d\n",
02f1175c
JS		 3344 j + 1, (unsigned long)cy_isa_address,
3345 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 3346 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3347
734cc178
JS		 3348 for (k = 0, j = cy_next_channel;
3349 j < cy_next_channel + cy_isa_nchan; j++, k++)
3350 tty_port_register_device(&card->ports[k].port,
3351 cy_serial_driver, j, NULL);
02f1175c
JS		 3352 cy_next_channel += cy_isa_nchan;
3353 }
096dcfce 3354 return nboard;
1da177e4 3355#else
096dcfce 3356 return 0;
02f1175c
JS		 3357#endif /* CONFIG_ISA */
3358} /* cy_detect_isa */
1da177e4 3359
58936d8d 3360#ifdef CONFIG_PCI
9671f099 3361static inline int cyc_isfwstr(const char *str, unsigned int size)
054f5b0a
JS		 3362{
3363 unsigned int a;
3364
3365 for (a = 0; a < size && *str; a++, str++)
3366 if (*str & 0x80)
3367 return -EINVAL;
3368
3369 for (; a < size; a++, str++)
3370 if (*str)
3371 return -EINVAL;
3372
3373 return 0;
3374}
3375
9671f099 3376static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
054f5b0a
JS		 3377 unsigned int size)
3378{
3379 for (; size > 0; size--) {
3380 cy_writel(fpga, *data++);
3381 udelay(10);
3382 }
3383}
3384
9671f099 3385static void plx_init(struct pci_dev *pdev, int irq,
054f5b0a 3386 struct RUNTIME_9060 __iomem *addr)
1da177e4 3387{
02f1175c 3388 /* Reset PLX */
054f5b0a 3389 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 3390 udelay(100L);
054f5b0a 3391 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 3392
3393 /* Reload Config. Registers from EEPROM */
054f5b0a 3394 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 3395 udelay(100L);
054f5b0a
JS		 3396 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3397
3398 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3399 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3400 * registers. This will remain here until we find a permanent fix.
3401 */
3402 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3403}
3404
9671f099 3405static int __cyz_load_fw(const struct firmware *fw,
054f5b0a
JS		 3406 const char *name, const u32 mailbox, void __iomem *base,
3407 void __iomem *fpga)
3408{
f61e761e
DW		 3409 const void *ptr = fw->data;
3410 const struct zfile_header *h = ptr;
3411 const struct zfile_config *c, *cs;
3412 const struct zfile_block *b, *bs;
054f5b0a
JS		 3413 unsigned int a, tmp, len = fw->size;
3414#define BAD_FW KERN_ERR "Bad firmware: "
3415 if (len < sizeof(*h)) {
3416 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3417 return -EINVAL;
3418 }
3419
3420 cs = ptr + h->config_offset;
3421 bs = ptr + h->block_offset;
3422
3423 if ((void *)(cs + h->n_config) > ptr + len ||
3424 (void *)(bs + h->n_blocks) > ptr + len) {
3425 printk(BAD_FW "too short");
3426 return -EINVAL;
3427 }
3428
3429 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3430 cyc_isfwstr(h->date, sizeof(h->date))) {
3431 printk(BAD_FW "bad formatted header string\n");
3432 return -EINVAL;
3433 }
3434
3435 if (strncmp(name, h->name, sizeof(h->name))) {
3436 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3437 return -EINVAL;
3438 }
3439
3440 tmp = 0;
3441 for (c = cs; c < cs + h->n_config; c++) {
3442 for (a = 0; a < c->n_blocks; a++)
3443 if (c->block_list[a] > h->n_blocks) {
3444 printk(BAD_FW "bad block ref number in cfgs\n");
3445 return -EINVAL;
3446 }
3447 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3448 tmp++;
3449 }
3450 if (!tmp) {
3451 printk(BAD_FW "nothing appropriate\n");
3452 return -EINVAL;
3453 }
3454
3455 for (b = bs; b < bs + h->n_blocks; b++)
3456 if (b->file_offset + b->size > len) {
3457 printk(BAD_FW "bad block data offset\n");
3458 return -EINVAL;
3459 }
3460
3461 /* everything is OK, let's seek'n'load it */
3462 for (c = cs; c < cs + h->n_config; c++)
3463 if (c->mailbox == mailbox && c->function == 0)
3464 break;
3465
3466 for (a = 0; a < c->n_blocks; a++) {
3467 b = &bs[c->block_list[a]];
3468 if (b->type == ZBLOCK_FPGA) {
3469 if (fpga != NULL)
3470 cyz_fpga_copy(fpga, ptr + b->file_offset,
3471 b->size);
3472 } else {
3473 if (base != NULL)
3474 memcpy_toio(base + b->ram_offset,
3475 ptr + b->file_offset, b->size);
3476 }
3477 }
3478#undef BAD_FW
3479 return 0;
3480}
3481
9671f099 3482static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
054f5b0a
JS		 3483 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3484{
3485 const struct firmware *fw;
3486 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3487 struct CUSTOM_REG __iomem *cust = base_addr;
3488 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 3489 void __iomem *tmp;
963118ee 3490 u32 mailbox, status, nchan;
054f5b0a
JS		 3491 unsigned int i;
3492 int retval;
3493
3494 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3495 if (retval) {
3496 dev_err(&pdev->dev, "can't get firmware\n");
3497 goto err;
3498 }
3499
3500 /* Check whether the firmware is already loaded and running. If
3501 positive, skip this board */
2693f485 3502 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
054f5b0a
JS		 3503 u32 cntval = readl(base_addr + 0x190);
3504
3505 udelay(100);
3506 if (cntval != readl(base_addr + 0x190)) {
3507 /* FW counter is working, FW is running */
3508 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3509 "Skipping board.\n");
3510 retval = 0;
3511 goto err_rel;
3512 }
3513 }
3514
3515 /* start boot */
3516 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3517 ~0x00030800UL);
3518
3519 mailbox = readl(&ctl_addr->mail_box_0);
3520
2693f485 3521 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 3522 /* stops CPU and set window to beginning of RAM */
3523 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3524 cy_writel(&cust->cpu_stop, 0);
3525 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3526 udelay(100);
3527 }
3528
3529 plx_init(pdev, irq, ctl_addr);
3530
3531 if (mailbox != 0) {
3532 /* load FPGA */
3533 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3534 base_addr);
3535 if (retval)
3536 goto err_rel;
2693f485 3537 if (!__cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 3538 dev_err(&pdev->dev, "fw upload successful, but fw is "
3539 "not loaded\n");
3540 goto err_rel;
3541 }
3542 }
3543
3544 /* stops CPU and set window to beginning of RAM */
3545 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3546 cy_writel(&cust->cpu_stop, 0);
3547 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3548 udelay(100);
3549
3550 /* clear memory */
c4923b4f 3551 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 3552 cy_writeb(tmp, 255);
3553 if (mailbox != 0) {
3554 /* set window to last 512K of RAM */
3555 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
c4923b4f 3556 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 3557 cy_writeb(tmp, 255);
3558 /* set window to beginning of RAM */
3559 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
054f5b0a
JS		 3560 }
3561
3562 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3563 release_firmware(fw);
3564 if (retval)
3565 goto err;
3566
3567 /* finish boot and start boards */
3568 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3569 cy_writel(&cust->cpu_start, 0);
3570 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3571 i = 0;
3572 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3573 msleep(100);
3574 if (status != ZFIRM_ID) {
3575 if (status == ZFIRM_HLT) {
3576 dev_err(&pdev->dev, "you need an external power supply "
3577 "for this number of ports. Firmware halted and "
3578 "board reset.\n");
3579 retval = -EIO;
3580 goto err;
3581 }
3582 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3583 "some more time\n", status);
3584 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3585 i++ < 200)
3586 msleep(100);
3587 if (status != ZFIRM_ID) {
3588 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3589 "Giving up. (fid->signature = 0x%x)\n",
3590 status);
3591 dev_info(&pdev->dev, "*** Warning ***: if you are "
3592 "upgrading the FW, please power cycle the "
3593 "system before loading the new FW to the "
3594 "Cyclades-Z.\n");
3595
2693f485 3596 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 3597 plx_init(pdev, irq, ctl_addr);
3598
3599 retval = -EIO;
3600 goto err;
3601 }
3602 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3603 i / 10);
3604 }
3605 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3606
3607 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3608 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3609 base_addr + readl(&fid->zfwctrl_addr));
3610
963118ee 3611 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
054f5b0a 3612 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
963118ee 3613 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
054f5b0a 3614
963118ee 3615 if (nchan == 0) {
054f5b0a
JS		 3616 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3617 "check the connection between the Z host card and the "
3618 "serial expanders.\n");
3619
2693f485 3620 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 3621 plx_init(pdev, irq, ctl_addr);
3622
3623 dev_info(&pdev->dev, "Null number of ports detected. Board "
3624 "reset.\n");
3625 retval = 0;
3626 goto err;
3627 }
3628
3629 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3630 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3631
3632 /*
3633 Early firmware failed to start looking for commands.
3634 This enables firmware interrupts for those commands.
3635 */
3636 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3637 (1 << 17));
3638 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3639 0x00030800UL);
3640
963118ee 3641 return nchan;
054f5b0a
JS		 3642err_rel:
3643 release_firmware(fw);
3644err:
3645 return retval;
1da177e4
LT		 3646}
3647
9671f099 3648static int cy_pci_probe(struct pci_dev *pdev,
58936d8d 3649 const struct pci_device_id *ent)
1da177e4 3650{
718c4ca1 3651 struct cyclades_card *card;
3137553d
JS		 3652 void __iomem *addr0 = NULL, *addr2 = NULL;
3653 char *card_name = NULL;
101b8159 3654 u32 uninitialized_var(mailbox);
734cc178 3655 unsigned int device_id, nchan = 0, card_no, i, j;
3137553d
JS		 3656 unsigned char plx_ver;
3657 int retval, irq;
02f1175c 3658
58936d8d
JS		 3659 retval = pci_enable_device(pdev);
3660 if (retval) {
3661 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 3662 goto err;
58936d8d 3663 }
1da177e4 3664
58936d8d 3665 /* read PCI configuration area */
3137553d 3666 irq = pdev->irq;
58936d8d 3667 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 3668
3137553d
JS		 3669#if defined(__alpha__)
3670 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3671 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3672 "addresses on Alpha systems.\n");
3673 retval = -EIO;
3674 goto err_dis;
3675 }
3676#endif
3677 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3678 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3679 "addresses\n");
3680 retval = -EIO;
3681 goto err_dis;
3682 }
3683
3684 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3685 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3686 "it...\n");
3687 pdev->resource[2].flags &= ~IORESOURCE_IO;
3688 }
3689
3690 retval = pci_request_regions(pdev, "cyclades");
3691 if (retval) {
3692 dev_err(&pdev->dev, "failed to reserve resources\n");
3693 goto err_dis;
3694 }
3695
3696 retval = -EIO;
58936d8d
JS		 3697 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3698 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 3699 card_name = "Cyclom-Y";
1da177e4 3700
24e6fd4c
JS		 3701 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3702 CyPCI_Yctl);
3137553d
JS		 3703 if (addr0 == NULL) {
3704 dev_err(&pdev->dev, "can't remap ctl region\n");
3705 goto err_reg;
58936d8d 3706 }
24e6fd4c
JS		 3707 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3708 CyPCI_Ywin);
3137553d
JS		 3709 if (addr2 == NULL) {
3710 dev_err(&pdev->dev, "can't remap base region\n");
3711 goto err_unmap;
58936d8d 3712 }
1da177e4 3713
3137553d
JS		 3714 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3715 if (nchan == 0) {
21719191
JS		 3716 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3717 "Serial-Modules\n");
c847d47c 3718 goto err_unmap;
58936d8d 3719 }
58936d8d 3720 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 3721 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 3722
24e6fd4c
JS		 3723 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3724 CyPCI_Zctl);
3137553d
JS		 3725 if (addr0 == NULL) {
3726 dev_err(&pdev->dev, "can't remap ctl region\n");
3727 goto err_reg;
3728 }
58936d8d
JS		 3729
3730 /* Disable interrupts on the PLX before resetting it */
97e87f8e
JS		 3731 cy_writew(&ctl_addr->intr_ctrl_stat,
3732 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
58936d8d 3733
054f5b0a 3734 plx_init(pdev, irq, addr0);
02f1175c 3735
101b8159 3736 mailbox = readl(&ctl_addr->mail_box_0);
58936d8d 3737
24e6fd4c
JS		 3738 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3739 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3137553d
JS		 3740 if (addr2 == NULL) {
3741 dev_err(&pdev->dev, "can't remap base region\n");
3742 goto err_unmap;
58936d8d
JS		 3743 }
3744
3745 if (mailbox == ZE_V1) {
3137553d 3746 card_name = "Cyclades-Ze";
58936d8d 3747 } else {
3137553d 3748 card_name = "Cyclades-8Zo";
1da177e4 3749#ifdef CY_PCI_DEBUG
3137553d
JS		 3750 if (mailbox == ZO_V1) {
3751 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3752 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3753 "id %lx, ver %lx\n", (ulong)(0xff &
3754 readl(&((struct CUSTOM_REG *)addr2)->
3755 fpga_id)), (ulong)(0xff &
3756 readl(&((struct CUSTOM_REG *)addr2)->
3757 fpga_version)));
3758 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3759 } else {
3760 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3761 "Cyclades-Z board. FPGA not loaded\n");
3762 }
1da177e4 3763#endif
3137553d
JS		 3764 /* The following clears the firmware id word. This
3765 ensures that the driver will not attempt to talk to
3766 the board until it has been properly initialized.
3767 */
3768 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3769 cy_writel(addr2 + ID_ADDRESS, 0L);
58936d8d 3770 }
ace08c3c
JS		 3771
3772 retval = cyz_load_fw(pdev, addr2, addr0, irq);
963118ee 3773 if (retval <= 0)
ace08c3c 3774 goto err_unmap;
963118ee 3775 nchan = retval;
3137553d
JS		 3776 }
3777
3778 if ((cy_next_channel + nchan) > NR_PORTS) {
3779 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3780 "channels are available. Change NR_PORTS in "
3781 "cyclades.c and recompile kernel.\n");
3782 goto err_unmap;
3783 }
3784 /* fill the next cy_card structure available */
3785 for (card_no = 0; card_no < NR_CARDS; card_no++) {
718c4ca1
JS		 3786 card = &cy_card[card_no];
3787 if (card->base_addr == NULL)
3137553d
JS		 3788 break;
3789 }
3790 if (card_no == NR_CARDS) { /* no more cy_cards available */
3791 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3792 "more cards can be used. Change NR_CARDS in "
3793 "cyclades.c and recompile kernel.\n");
3794 goto err_unmap;
3795 }
3796
3797 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3798 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3799 /* allocate IRQ */
3800 retval = request_irq(irq, cyy_interrupt,
718c4ca1 3801 IRQF_SHARED, "Cyclom-Y", card);
3137553d
JS		 3802 if (retval) {
3803 dev_err(&pdev->dev, "could not allocate IRQ\n");
3804 goto err_unmap;
58936d8d 3805 }
718c4ca1 3806 card->num_chips = nchan / CyPORTS_PER_CHIP;
3137553d 3807 } else {
f0eefdc3
JS		 3808 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3809 struct ZFW_CTRL __iomem *zfw_ctrl;
3810
3811 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3812
718c4ca1
JS		 3813 card->hw_ver = mailbox;
3814 card->num_chips = (unsigned int)-1;
3815 card->board_ctrl = &zfw_ctrl->board_ctrl;
02f1175c 3816#ifdef CONFIG_CYZ_INTR
58936d8d 3817 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 3818 if (irq != 0 && irq != 255) {
3819 retval = request_irq(irq, cyz_interrupt,
718c4ca1 3820 IRQF_SHARED, "Cyclades-Z", card);
58936d8d 3821 if (retval) {
21719191 3822 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 3823 goto err_unmap;
02f1175c 3824 }
58936d8d 3825 }
02f1175c 3826#endif /* CONFIG_CYZ_INTR */
3137553d 3827 }
02f1175c 3828
3137553d 3829 /* set cy_card */
718c4ca1
JS		 3830 card->base_addr = addr2;
3831 card->ctl_addr.p9050 = addr0;
3832 card->irq = irq;
3833 card->bus_index = 1;
3834 card->first_line = cy_next_channel;
3835 card->nports = nchan;
3836 retval = cy_init_card(card);
3137553d
JS		 3837 if (retval)
3838 goto err_null;
58936d8d 3839
718c4ca1 3840 pci_set_drvdata(pdev, card);
58936d8d 3841
3137553d
JS		 3842 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3843 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3844 /* enable interrupts in the PCI interface */
3845 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3846 switch (plx_ver) {
3847 case PLX_9050:
3137553d
JS		 3848 cy_writeb(addr0 + 0x4c, 0x43);
3849 break;
3850
3851 case PLX_9060:
3852 case PLX_9080:
3853 default: /* Old boards, use PLX_9060 */
97e87f8e
JS		 3854 {
3855 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3856 plx_init(pdev, irq, ctl_addr);
3857 cy_writew(&ctl_addr->intr_ctrl_stat,
3858 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3137553d
JS		 3859 break;
3860 }
97e87f8e 3861 }
58936d8d
JS		 3862 }
3863
3137553d
JS		 3864 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3865 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
734cc178
JS		 3866 for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++)
3867 tty_port_register_device(&card->ports[j].port,
3868 cy_serial_driver, i, &pdev->dev);
3137553d
JS		 3869 cy_next_channel += nchan;
3870
58936d8d 3871 return 0;
3137553d 3872err_null:
718c4ca1
JS		 3873 card->base_addr = NULL;
3874 free_irq(irq, card);
3137553d 3875err_unmap:
24e6fd4c 3876 iounmap(addr0);
3137553d 3877 if (addr2)
24e6fd4c 3878 iounmap(addr2);
3137553d
JS		 3879err_reg:
3880 pci_release_regions(pdev);
3881err_dis:
3882 pci_disable_device(pdev);
3883err:
3884 return retval;
58936d8d 3885}
58936d8d 3886
ae8d8a14 3887static void cy_pci_remove(struct pci_dev *pdev)
58936d8d 3888{
38d09093 3889 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
191c5f10 3890 unsigned int i, channel;
38d09093 3891
85c93fa9 3892 /* non-Z with old PLX */
2693f485 3893 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
c2ad4c75 3894 PLX_9050)
97e87f8e 3895 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
85c93fa9
JS		 3896 else
3897#ifndef CONFIG_CYZ_INTR
2693f485 3898 if (!cy_is_Z(cinfo))
85c93fa9 3899#endif
97e87f8e
JS		 3900 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3901 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3902 ~0x0900);
85c93fa9 3903
24e6fd4c 3904 iounmap(cinfo->base_addr);
97e87f8e
JS		 3905 if (cinfo->ctl_addr.p9050)
3906 iounmap(cinfo->ctl_addr.p9050);
38d09093
JS		 3907 if (cinfo->irq
3908#ifndef CONFIG_CYZ_INTR
2693f485 3909 && !cy_is_Z(cinfo)
38d09093
JS		 3910#endif /* CONFIG_CYZ_INTR */
3911 )
3912 free_irq(cinfo->irq, cinfo);
3913 pci_release_regions(pdev);
3914
3915 cinfo->base_addr = NULL;
191c5f10
JS		 3916 for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
3917 cinfo->nports; i++, channel++) {
6ad1ccc1 3918 tty_unregister_device(cy_serial_driver, i);
191c5f10
JS		 3919 tty_port_destroy(&cinfo->ports[channel].port);
3920 }
dd025c0c
JS		 3921 cinfo->nports = 0;
3922 kfree(cinfo->ports);
38d09093
JS		 3923}
3924
6747cd93
JS		 3925static struct pci_driver cy_pci_driver = {
3926 .name = "cyclades",
3927 .id_table = cy_pci_dev_id,
3928 .probe = cy_pci_probe,
91116cba 3929 .remove = cy_pci_remove
6747cd93
JS		 3930};
3931#endif
3932
444697d6 3933static int cyclades_proc_show(struct seq_file *m, void *v)
1da177e4 3934{
02f1175c 3935 struct cyclades_port *info;
dd025c0c 3936 unsigned int i, j;
02f1175c
JS		 3937 __u32 cur_jifs = jiffies;
3938
444697d6 3939 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
02f1175c
JS		 3940 "IdleIn Overruns Ldisc\n");
3941
02f1175c 3942 /* Output one line for each known port */
dd025c0c
JS		 3943 for (i = 0; i < NR_CARDS; i++)
3944 for (j = 0; j < cy_card[i].nports; j++) {
3945 info = &cy_card[i].ports[j];
3946
d13549f8
JS		 3947 if (info->port.count) {
3948 /* XXX is the ldisc num worth this? */
3949 struct tty_struct *tty;
3950 struct tty_ldisc *ld;
3951 int num = 0;
3952 tty = tty_port_tty_get(&info->port);
3953 if (tty) {
3954 ld = tty_ldisc_ref(tty);
3955 if (ld) {
3956 num = ld->ops->num;
3957 tty_ldisc_deref(ld);
3958 }
3959 tty_kref_put(tty);
3960 }
444697d6 3961 seq_printf(m, "%3d %8lu %10lu %8lu "
d13549f8 3962 "%10lu %8lu %9lu %6d\n", info->line,
dd025c0c
JS		 3963 (cur_jifs - info->idle_stats.in_use) /
3964 HZ, info->idle_stats.xmit_bytes,
3965 (cur_jifs - info->idle_stats.xmit_idle)/
3966 HZ, info->idle_stats.recv_bytes,
3967 (cur_jifs - info->idle_stats.recv_idle)/
3968 HZ, info->idle_stats.overruns,
d13549f8
JS		 3969 num);
3970 } else
444697d6 3971 seq_printf(m, "%3d %8lu %10lu %8lu "
dd025c0c
JS		 3972 "%10lu %8lu %9lu %6ld\n",
3973 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
02f1175c 3974 }
444697d6
AD		 3975 return 0;
3976}
3977
3978static int cyclades_proc_open(struct inode *inode, struct file *file)
3979{
3980 return single_open(file, cyclades_proc_show, NULL);
1da177e4
LT		 3981}
3982
444697d6
AD		 3983static const struct file_operations cyclades_proc_fops = {
3984 .owner = THIS_MODULE,
3985 .open = cyclades_proc_open,
3986 .read = seq_read,
3987 .llseek = seq_lseek,
3988 .release = single_release,
3989};
3990
1da177e4
LT		 3991/* The serial driver boot-time initialization code!
3992 Hardware I/O ports are mapped to character special devices on a
3993 first found, first allocated manner. That is, this code searches
3994 for Cyclom cards in the system. As each is found, it is probed
3995 to discover how many chips (and thus how many ports) are present.
3996 These ports are mapped to the tty ports 32 and upward in monotonic
3997 fashion. If an 8-port card is replaced with a 16-port card, the
3998 port mapping on a following card will shift.
3999
4000 This approach is different from what is used in the other serial
4001 device driver because the Cyclom is more properly a multiplexer,
4002 not just an aggregation of serial ports on one card.
4003
4004 If there are more cards with more ports than have been
4005 statically allocated above, a warning is printed and the
4006 extra ports are ignored.
4007 */
4008
b68e31d0 4009static const struct tty_operations cy_ops = {
02f1175c
JS		 4010 .open = cy_open,
4011 .close = cy_close,
4012 .write = cy_write,
4013 .put_char = cy_put_char,
4014 .flush_chars = cy_flush_chars,
4015 .write_room = cy_write_room,
4016 .chars_in_buffer = cy_chars_in_buffer,
4017 .flush_buffer = cy_flush_buffer,
4018 .ioctl = cy_ioctl,
4019 .throttle = cy_throttle,
4020 .unthrottle = cy_unthrottle,
4021 .set_termios = cy_set_termios,
4022 .stop = cy_stop,
4023 .start = cy_start,
4024 .hangup = cy_hangup,
4025 .break_ctl = cy_break,
4026 .wait_until_sent = cy_wait_until_sent,
02f1175c
JS		 4027 .tiocmget = cy_tiocmget,
4028 .tiocmset = cy_tiocmset,
0587102c 4029 .get_icount = cy_get_icount,
444697d6 4030 .proc_fops = &cyclades_proc_fops,
1da177e4
LT		 4031};
4032
02f1175c 4033static int __init cy_init(void)
1da177e4 4034{
dd025c0c 4035 unsigned int nboards;
9dacf3b2 4036 int retval = -ENOMEM;
02f1175c
JS		 4037
4038 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4039 if (!cy_serial_driver)
9dacf3b2 4040 goto err;
21719191 4041
64a14b51 4042 printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 4043
4044 /* Initialize the tty_driver structure */
4045
02f1175c
JS		 4046 cy_serial_driver->driver_name = "cyclades";
4047 cy_serial_driver->name = "ttyC";
4048 cy_serial_driver->major = CYCLADES_MAJOR;
4049 cy_serial_driver->minor_start = 0;
4050 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4051 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4052 cy_serial_driver->init_termios = tty_std_termios;
4053 cy_serial_driver->init_termios.c_cflag =
4054 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 4055 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 4056 tty_set_operations(cy_serial_driver, &cy_ops);
4057
9dacf3b2
JS		 4058 retval = tty_register_driver(cy_serial_driver);
4059 if (retval) {
4060 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4061 goto err_frtty;
4062 }
02f1175c 4063
02f1175c
JS		 4064 /* the code below is responsible to find the boards. Each different
4065 type of board has its own detection routine. If a board is found,
4066 the next cy_card structure available is set by the detection
4067 routine. These functions are responsible for checking the
4068 availability of cy_card and cy_port data structures and updating
4069 the cy_next_channel. */
4070
4071 /* look for isa boards */
14a55a67 4072 nboards = cy_detect_isa();
02f1175c 4073
6747cd93 4074#ifdef CONFIG_PCI
02f1175c 4075 /* look for pci boards */
6747cd93 4076 retval = pci_register_driver(&cy_pci_driver);
d941ea7d
JJ		 4077 if (retval && !nboards) {
4078 tty_unregister_driver(cy_serial_driver);
4079 goto err_frtty;
4080 }
6747cd93 4081#endif
9dacf3b2
JS		 4082
4083 return 0;
9dacf3b2
JS		 4084err_frtty:
4085 put_tty_driver(cy_serial_driver);
4086err:
4087 return retval;
02f1175c 4088} /* cy_init */
1da177e4 4089
02f1175c 4090static void __exit cy_cleanup_module(void)
1da177e4 4091{
dd025c0c 4092 struct cyclades_card *card;
65f76a82 4093 unsigned int i, e1;
1da177e4
LT		 4094
4095#ifndef CONFIG_CYZ_INTR
b7050906 4096 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 4097#endif /* CONFIG_CYZ_INTR */
4098
15ed6cc0
AC		 4099 e1 = tty_unregister_driver(cy_serial_driver);
4100 if (e1)
21719191
JS		 4101 printk(KERN_ERR "failed to unregister Cyclades serial "
4102 "driver(%d)\n", e1);
1da177e4 4103
6747cd93
JS		 4104#ifdef CONFIG_PCI
4105 pci_unregister_driver(&cy_pci_driver);
4106#endif
4107
02f1175c 4108 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 4109 card = &cy_card[i];
4110 if (card->base_addr) {
85c93fa9 4111 /* clear interrupt */
dd025c0c
JS		 4112 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4113 iounmap(card->base_addr);
97e87f8e
JS		 4114 if (card->ctl_addr.p9050)
4115 iounmap(card->ctl_addr.p9050);
dd025c0c 4116 if (card->irq
1da177e4 4117#ifndef CONFIG_CYZ_INTR
2693f485 4118 && !cy_is_Z(card)
1da177e4 4119#endif /* CONFIG_CYZ_INTR */
02f1175c 4120 )
dd025c0c 4121 free_irq(card->irq, card);
65f76a82 4122 for (e1 = card->first_line; e1 < card->first_line +
dd025c0c 4123 card->nports; e1++)
6ad1ccc1 4124 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 4125 kfree(card->ports);
02f1175c
JS		 4126 }
4127 }
f2462bfe
JS		 4128
4129 put_tty_driver(cy_serial_driver);
1da177e4
LT		 4130} /* cy_cleanup_module */
4131
4132module_init(cy_init);
4133module_exit(cy_cleanup_module);
4134
4135MODULE_LICENSE("GPL");
c8e1693a 4136MODULE_VERSION(CY_VERSION);
9f56fad7 4137MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
e6c4ef98 4138MODULE_FIRMWARE("cyzfirm.bin");
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