3 #undef Z_EXT_CHARS_IN_BUFFER
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
14 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
20 * Converted to pci probing and cleaned up by Jiri Slaby.
24 #define CY_VERSION "2.6"
26 /* If you need to install more boards than NR_CARDS, change the constant
27 in the definition below. No other change is necessary to support up to
28 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
33 If the total number of ports is larger than NR_PORTS, change this
34 constant in the definition below. No other change is necessary to
35 support more boards/ports. */
43 #define SERIAL_PARANOIA_CHECK
45 #undef CY_DEBUG_THROTTLE
50 #undef CY_DEBUG_WAIT_UNTIL_SENT
51 #undef CY_DEBUG_INTERRUPTS
53 #undef CY_ENABLE_MONITORING
59 #include <linux/module.h>
60 #include <linux/errno.h>
61 #include <linux/signal.h>
62 #include <linux/sched.h>
63 #include <linux/timer.h>
64 #include <linux/interrupt.h>
65 #include <linux/tty.h>
66 #include <linux/tty_flip.h>
67 #include <linux/serial.h>
68 #include <linux/smp_lock.h>
69 #include <linux/major.h>
70 #include <linux/string.h>
71 #include <linux/fcntl.h>
72 #include <linux/ptrace.h>
73 #include <linux/cyclades.h>
75 #include <linux/ioport.h>
76 #include <linux/init.h>
77 #include <linux/delay.h>
78 #include <linux/spinlock.h>
79 #include <linux/bitops.h>
80 #include <linux/firmware.h>
81 #include <linux/device.h>
84 #include <linux/uaccess.h>
86 #include <linux/kernel.h>
87 #include <linux/pci.h>
89 #include <linux/stat.h>
90 #include <linux/proc_fs.h>
91 #include <linux/seq_file.h>
93 static void cy_send_xchar(struct tty_struct *tty, char ch);
95 #ifndef SERIAL_XMIT_SIZE
96 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
99 #define STD_COM_FLAGS (0)
102 #define ZL_MAX_BLOCKS 16
103 #define DRIVER_VERSION 0x02010203
104 #define RAM_SIZE 0x80000
111 struct zfile_header {
120 } __attribute__ ((packed));
122 struct zfile_config {
127 u32 block_list[ZL_MAX_BLOCKS];
128 } __attribute__ ((packed));
135 } __attribute__ ((packed));
137 static struct tty_driver *cy_serial_driver;
140 /* This is the address lookup table. The driver will probe for
141 Cyclom-Y/ISA boards at all addresses in here. If you want the
142 driver to probe addresses at a different address, add it to
143 this table. If the driver is probing some other board and
144 causing problems, remove the offending address from this table.
147 static unsigned int cy_isa_addresses[] = {
156 0, 0, 0, 0, 0, 0, 0, 0
159 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
162 static long maddr[NR_CARDS];
163 static int irq[NR_CARDS];
165 module_param_array(maddr, long, NULL, 0);
166 module_param_array(irq, int, NULL, 0);
169 #endif /* CONFIG_ISA */
171 /* This is the per-card data structure containing address, irq, number of
172 channels, etc. This driver supports a maximum of NR_CARDS cards.
174 static struct cyclades_card cy_card[NR_CARDS];
176 static int cy_next_channel; /* next minor available */
179 * This is used to look up the divisor speeds and the timeouts
180 * We're normally limited to 15 distinct baud rates. The extra
181 * are accessed via settings in info->port.flags.
182 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
183 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
187 static const int baud_table[] = {
188 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
189 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
193 static const char baud_co_25[] = { /* 25 MHz clock option table */
194 /* value => 00 01 02 03 04 */
195 /* divide by 8 32 128 512 2048 */
196 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
197 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
200 static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
201 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
202 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
205 static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
206 /* value => 00 01 02 03 04 */
207 /* divide by 8 32 128 512 2048 */
208 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
209 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
213 static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
214 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
215 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
219 static const char baud_cor3[] = { /* receive threshold */
220 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
221 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
226 * The Cyclades driver implements HW flow control as any serial driver.
227 * The cyclades_port structure member rflow and the vector rflow_thr
228 * allows us to take advantage of a special feature in the CD1400 to avoid
229 * data loss even when the system interrupt latency is too high. These flags
230 * are to be used only with very special applications. Setting these flags
231 * requires the use of a special cable (DTR and RTS reversed). In the new
232 * CD1400-based boards (rev. 6.00 or later), there is no need for special
236 static const char rflow_thr[] = { /* rflow threshold */
237 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
238 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
242 /* The Cyclom-Ye has placed the sequential chips in non-sequential
243 * address order. This look-up table overcomes that problem.
245 static const unsigned int cy_chip_offset[] = { 0x0000,
255 /* PCI related definitions */
258 static const struct pci_device_id cy_pci_dev_id[] = {
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
270 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
272 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
274 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
275 { } /* end of table */
277 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
280 static void cy_start(struct tty_struct *);
281 static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
282 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
284 static unsigned detect_isa_irq(void __iomem *);
285 #endif /* CONFIG_ISA */
287 #ifndef CONFIG_CYZ_INTR
288 static void cyz_poll(unsigned long);
290 /* The Cyclades-Z polling cycle is defined by this variable */
291 static long cyz_polling_cycle = CZ_DEF_POLL;
293 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
295 #else /* CONFIG_CYZ_INTR */
296 static void cyz_rx_restart(unsigned long);
297 static struct timer_list cyz_rx_full_timer[NR_PORTS];
298 #endif /* CONFIG_CYZ_INTR */
300 static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
302 struct cyclades_card *card = port->card;
304 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
307 static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
309 struct cyclades_card *card = port->card;
311 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
314 static inline bool cy_is_Z(struct cyclades_card *card)
316 return card->num_chips == (unsigned int)-1;
319 static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
321 return readl(&ctl_addr->init_ctrl) & (1 << 17);
324 static inline bool cyz_fpga_loaded(struct cyclades_card *card)
326 return __cyz_fpga_loaded(card->ctl_addr.p9060);
329 static inline bool cyz_is_loaded(struct cyclades_card *card)
331 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
333 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
334 readl(&fw_id->signature) == ZFIRM_ID;
337 static inline int serial_paranoia_check(struct cyclades_port *info,
338 const char *name, const char *routine)
340 #ifdef SERIAL_PARANOIA_CHECK
342 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
343 "in %s\n", name, routine);
347 if (info->magic != CYCLADES_MAGIC) {
348 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
349 "struct (%s) in %s\n", name, routine);
356 /***********************************************************/
357 /********* Start of block of Cyclom-Y specific code ********/
359 /* This routine waits up to 1000 micro-seconds for the previous
360 command to the Cirrus chip to complete and then issues the
361 new command. An error is returned if the previous command
362 didn't finish within the time limit.
364 This function is only called from inside spinlock-protected code.
366 static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
368 void __iomem *ccr = base_addr + (CyCCR << index);
371 /* Check to see that the previous command has completed */
372 for (i = 0; i < 100; i++) {
377 /* if the CCR never cleared, the previous command
378 didn't finish within the "reasonable time" */
382 /* Issue the new command */
388 static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
390 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
391 port->card->bus_index);
395 /* ISA interrupt detection code */
396 static unsigned detect_isa_irq(void __iomem *address)
399 unsigned long irqs, flags;
400 int save_xir, save_car;
401 int index = 0; /* IRQ probing is only for ISA */
403 /* forget possible initially masked and pending IRQ */
404 irq = probe_irq_off(probe_irq_on());
406 /* Clear interrupts on the board first */
407 cy_writeb(address + (Cy_ClrIntr << index), 0);
408 /* Cy_ClrIntr is 0x1800 */
410 irqs = probe_irq_on();
414 /* Enable the Tx interrupts on the CD1400 */
415 local_irq_save(flags);
416 cy_writeb(address + (CyCAR << index), 0);
417 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
419 cy_writeb(address + (CyCAR << index), 0);
420 cy_writeb(address + (CySRER << index),
421 readb(address + (CySRER << index)) | CyTxRdy);
422 local_irq_restore(flags);
427 /* Check which interrupt is in use */
428 irq = probe_irq_off(irqs);
431 save_xir = (u_char) readb(address + (CyTIR << index));
432 save_car = readb(address + (CyCAR << index));
433 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
434 cy_writeb(address + (CySRER << index),
435 readb(address + (CySRER << index)) & ~CyTxRdy);
436 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
437 cy_writeb(address + (CyCAR << index), (save_car));
438 cy_writeb(address + (Cy_ClrIntr << index), 0);
439 /* Cy_ClrIntr is 0x1800 */
441 return (irq > 0) ? irq : 0;
443 #endif /* CONFIG_ISA */
445 static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
446 void __iomem *base_addr)
448 struct cyclades_port *info;
449 struct tty_struct *tty;
450 int len, index = cinfo->bus_index;
451 u8 ivr, save_xir, channel, save_car, data, char_count;
453 #ifdef CY_DEBUG_INTERRUPTS
454 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
456 /* determine the channel & change to that context */
457 save_xir = readb(base_addr + (CyRIR << index));
458 channel = save_xir & CyIRChannel;
459 info = &cinfo->ports[channel + chip * 4];
460 save_car = cyy_readb(info, CyCAR);
461 cyy_writeb(info, CyCAR, save_xir);
462 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
464 tty = tty_port_tty_get(&info->port);
465 /* if there is nowhere to put the data, discard it */
467 if (ivr == CyIVRRxEx) { /* exception */
468 data = cyy_readb(info, CyRDSR);
469 } else { /* normal character reception */
470 char_count = cyy_readb(info, CyRDCR);
472 data = cyy_readb(info, CyRDSR);
476 /* there is an open port for this data */
477 if (ivr == CyIVRRxEx) { /* exception */
478 data = cyy_readb(info, CyRDSR);
480 /* For statistics only */
483 else if (data & CyFRAME)
484 info->icount.frame++;
485 else if (data & CyPARITY)
486 info->icount.parity++;
487 else if (data & CyOVERRUN)
488 info->icount.overrun++;
490 if (data & info->ignore_status_mask) {
495 if (tty_buffer_request_room(tty, 1)) {
496 if (data & info->read_status_mask) {
497 if (data & CyBREAK) {
498 tty_insert_flip_char(tty,
499 cyy_readb(info, CyRDSR),
502 if (info->port.flags & ASYNC_SAK)
504 } else if (data & CyFRAME) {
505 tty_insert_flip_char(tty,
506 cyy_readb(info, CyRDSR),
509 info->idle_stats.frame_errs++;
510 } else if (data & CyPARITY) {
511 /* Pieces of seven... */
512 tty_insert_flip_char(tty,
513 cyy_readb(info, CyRDSR),
516 info->idle_stats.parity_errs++;
517 } else if (data & CyOVERRUN) {
518 tty_insert_flip_char(tty, 0,
521 /* If the flip buffer itself is
522 overflowing, we still lose
523 the next incoming character.
525 tty_insert_flip_char(tty,
526 cyy_readb(info, CyRDSR),
529 info->idle_stats.overruns++;
530 /* These two conditions may imply */
531 /* a normal read should be done. */
532 /* } else if(data & CyTIMEOUT) { */
533 /* } else if(data & CySPECHAR) { */
535 tty_insert_flip_char(tty, 0,
540 tty_insert_flip_char(tty, 0, TTY_NORMAL);
544 /* there was a software buffer overrun and nothing
545 * could be done about it!!! */
546 info->icount.buf_overrun++;
547 info->idle_stats.overruns++;
549 } else { /* normal character reception */
550 /* load # chars available from the chip */
551 char_count = cyy_readb(info, CyRDCR);
553 #ifdef CY_ENABLE_MONITORING
554 ++info->mon.int_count;
555 info->mon.char_count += char_count;
556 if (char_count > info->mon.char_max)
557 info->mon.char_max = char_count;
558 info->mon.char_last = char_count;
560 len = tty_buffer_request_room(tty, char_count);
562 data = cyy_readb(info, CyRDSR);
563 tty_insert_flip_char(tty, data, TTY_NORMAL);
564 info->idle_stats.recv_bytes++;
570 info->idle_stats.recv_idle = jiffies;
572 tty_schedule_flip(tty);
576 cyy_writeb(info, CyRIR, save_xir & 0x3f);
577 cyy_writeb(info, CyCAR, save_car);
580 static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
581 void __iomem *base_addr)
583 struct cyclades_port *info;
584 struct tty_struct *tty;
585 int char_count, index = cinfo->bus_index;
586 u8 save_xir, channel, save_car, outch;
588 /* Since we only get here when the transmit buffer
589 is empty, we know we can always stuff a dozen
591 #ifdef CY_DEBUG_INTERRUPTS
592 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
595 /* determine the channel & change to that context */
596 save_xir = readb(base_addr + (CyTIR << index));
597 channel = save_xir & CyIRChannel;
598 save_car = readb(base_addr + (CyCAR << index));
599 cy_writeb(base_addr + (CyCAR << index), save_xir);
601 /* validate the port# (as configured and open) */
602 if (channel + chip * 4 >= cinfo->nports) {
603 cy_writeb(base_addr + (CySRER << index),
604 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
607 info = &cinfo->ports[channel + chip * 4];
608 tty = tty_port_tty_get(&info->port);
610 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
614 /* load the on-chip space for outbound data */
615 char_count = info->xmit_fifo_size;
617 if (info->x_char) { /* send special char */
618 outch = info->x_char;
619 cyy_writeb(info, CyTDR, outch);
625 if (info->breakon || info->breakoff) {
627 cyy_writeb(info, CyTDR, 0);
628 cyy_writeb(info, CyTDR, 0x81);
632 if (info->breakoff) {
633 cyy_writeb(info, CyTDR, 0);
634 cyy_writeb(info, CyTDR, 0x83);
640 while (char_count-- > 0) {
641 if (!info->xmit_cnt) {
642 if (cyy_readb(info, CySRER) & CyTxMpty) {
643 cyy_writeb(info, CySRER,
644 cyy_readb(info, CySRER) & ~CyTxMpty);
646 cyy_writeb(info, CySRER, CyTxMpty |
647 (cyy_readb(info, CySRER) & ~CyTxRdy));
651 if (info->port.xmit_buf == NULL) {
652 cyy_writeb(info, CySRER,
653 cyy_readb(info, CySRER) & ~CyTxRdy);
656 if (tty->stopped || tty->hw_stopped) {
657 cyy_writeb(info, CySRER,
658 cyy_readb(info, CySRER) & ~CyTxRdy);
661 /* Because the Embedded Transmit Commands have been enabled,
662 * we must check to see if the escape character, NULL, is being
663 * sent. If it is, we must ensure that there is room for it to
664 * be doubled in the output stream. Therefore we no longer
665 * advance the pointer when the character is fetched, but
666 * rather wait until after the check for a NULL output
667 * character. This is necessary because there may not be room
668 * for the two chars needed to send a NULL.)
670 outch = info->port.xmit_buf[info->xmit_tail];
673 info->xmit_tail = (info->xmit_tail + 1) &
674 (SERIAL_XMIT_SIZE - 1);
675 cyy_writeb(info, CyTDR, outch);
678 if (char_count > 1) {
680 info->xmit_tail = (info->xmit_tail + 1) &
681 (SERIAL_XMIT_SIZE - 1);
682 cyy_writeb(info, CyTDR, outch);
683 cyy_writeb(info, CyTDR, 0);
695 cyy_writeb(info, CyTIR, save_xir & 0x3f);
696 cyy_writeb(info, CyCAR, save_car);
699 static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
700 void __iomem *base_addr)
702 struct cyclades_port *info;
703 struct tty_struct *tty;
704 int index = cinfo->bus_index;
705 u8 save_xir, channel, save_car, mdm_change, mdm_status;
707 /* determine the channel & change to that context */
708 save_xir = readb(base_addr + (CyMIR << index));
709 channel = save_xir & CyIRChannel;
710 info = &cinfo->ports[channel + chip * 4];
711 save_car = cyy_readb(info, CyCAR);
712 cyy_writeb(info, CyCAR, save_xir);
714 mdm_change = cyy_readb(info, CyMISR);
715 mdm_status = cyy_readb(info, CyMSVR1);
717 tty = tty_port_tty_get(&info->port);
721 if (mdm_change & CyANY_DELTA) {
722 /* For statistics only */
723 if (mdm_change & CyDCD)
725 if (mdm_change & CyCTS)
727 if (mdm_change & CyDSR)
729 if (mdm_change & CyRI)
732 wake_up_interruptible(&info->delta_msr_wait);
735 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
736 if (mdm_status & CyDCD)
737 wake_up_interruptible(&info->port.open_wait);
741 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
742 if (tty->hw_stopped) {
743 if (mdm_status & CyCTS) {
744 /* cy_start isn't used
747 cyy_writeb(info, CySRER,
748 cyy_readb(info, CySRER) | CyTxRdy);
752 if (!(mdm_status & CyCTS)) {
753 /* cy_stop isn't used
756 cyy_writeb(info, CySRER,
757 cyy_readb(info, CySRER) & ~CyTxRdy);
761 /* if (mdm_change & CyDSR) {
763 if (mdm_change & CyRI) {
768 cyy_writeb(info, CyMIR, save_xir & 0x3f);
769 cyy_writeb(info, CyCAR, save_car);
772 /* The real interrupt service routine is called
773 whenever the card wants its hand held--chars
774 received, out buffer empty, modem change, etc.
776 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
779 struct cyclades_card *cinfo = dev_id;
780 void __iomem *base_addr, *card_base_addr;
781 unsigned int chip, too_many, had_work;
784 if (unlikely(cinfo == NULL)) {
785 #ifdef CY_DEBUG_INTERRUPTS
786 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
789 return IRQ_NONE; /* spurious interrupt */
792 card_base_addr = cinfo->base_addr;
793 index = cinfo->bus_index;
795 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
796 if (unlikely(card_base_addr == NULL))
799 /* This loop checks all chips in the card. Make a note whenever
800 _any_ chip had some work to do, as this is considered an
801 indication that there will be more to do. Only when no chip
802 has any work does this outermost loop exit.
806 for (chip = 0; chip < cinfo->num_chips; chip++) {
807 base_addr = cinfo->base_addr +
808 (cy_chip_offset[chip] << index);
810 while ((status = readb(base_addr +
811 (CySVRR << index))) != 0x00) {
813 /* The purpose of the following test is to ensure that
814 no chip can monopolize the driver. This forces the
815 chips to be checked in a round-robin fashion (after
816 draining each of a bunch (1000) of characters).
818 if (1000 < too_many++)
820 spin_lock(&cinfo->card_lock);
821 if (status & CySRReceive) /* rx intr */
822 cyy_chip_rx(cinfo, chip, base_addr);
823 if (status & CySRTransmit) /* tx intr */
824 cyy_chip_tx(cinfo, chip, base_addr);
825 if (status & CySRModem) /* modem intr */
826 cyy_chip_modem(cinfo, chip, base_addr);
827 spin_unlock(&cinfo->card_lock);
832 /* clear interrupts */
833 spin_lock(&cinfo->card_lock);
834 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
835 /* Cy_ClrIntr is 0x1800 */
836 spin_unlock(&cinfo->card_lock);
838 } /* cyy_interrupt */
840 static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
843 struct cyclades_card *card = info->card;
844 int channel = info->line - card->first_line;
845 u32 rts, dtr, msvrr, msvrd;
849 if (info->rtsdtr_inv) {
860 if (set & TIOCM_RTS) {
861 cyy_writeb(info, CyCAR, channel);
862 cyy_writeb(info, msvrr, rts);
864 if (clear & TIOCM_RTS) {
865 cyy_writeb(info, CyCAR, channel);
866 cyy_writeb(info, msvrr, ~rts);
868 if (set & TIOCM_DTR) {
869 cyy_writeb(info, CyCAR, channel);
870 cyy_writeb(info, msvrd, dtr);
872 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
873 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
874 cyy_readb(info, CyMSVR1),
875 cyy_readb(info, CyMSVR2));
878 if (clear & TIOCM_DTR) {
879 cyy_writeb(info, CyCAR, channel);
880 cyy_writeb(info, msvrd, ~dtr);
882 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
883 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
884 cyy_readb(info, CyMSVR1),
885 cyy_readb(info, CyMSVR2));
890 /***********************************************************/
891 /********* End of block of Cyclom-Y specific code **********/
892 /******** Start of block of Cyclades-Z specific code *******/
893 /***********************************************************/
896 cyz_fetch_msg(struct cyclades_card *cinfo,
897 __u32 *channel, __u8 *cmd, __u32 *param)
899 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
900 unsigned long loc_doorbell;
902 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
904 *cmd = (char)(0xff & loc_doorbell);
905 *channel = readl(&board_ctrl->fwcmd_channel);
906 *param = (__u32) readl(&board_ctrl->fwcmd_param);
907 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
911 } /* cyz_fetch_msg */
914 cyz_issue_cmd(struct cyclades_card *cinfo,
915 __u32 channel, __u8 cmd, __u32 param)
917 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
918 __u32 __iomem *pci_doorbell;
921 if (!cyz_is_loaded(cinfo))
925 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
926 while ((readl(pci_doorbell) & 0xff) != 0) {
928 return (int)(readl(pci_doorbell) & 0xff);
931 cy_writel(&board_ctrl->hcmd_channel, channel);
932 cy_writel(&board_ctrl->hcmd_param, param);
933 cy_writel(pci_doorbell, (long)cmd);
936 } /* cyz_issue_cmd */
938 static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
940 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
941 struct cyclades_card *cinfo = info->card;
942 unsigned int char_count;
949 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
951 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
952 rx_put = readl(&buf_ctrl->rx_put);
953 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
954 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
955 if (rx_put >= rx_get)
956 char_count = rx_put - rx_get;
958 char_count = rx_put - rx_get + rx_bufsize;
961 #ifdef CY_ENABLE_MONITORING
962 info->mon.int_count++;
963 info->mon.char_count += char_count;
964 if (char_count > info->mon.char_max)
965 info->mon.char_max = char_count;
966 info->mon.char_last = char_count;
969 /* flush received characters */
970 new_rx_get = (new_rx_get + char_count) &
972 info->rflush_count++;
975 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
976 for performance, but because of buffer boundaries, there
977 may be several steps to the operation */
979 len = tty_prepare_flip_string(tty, &buf,
984 len = min_t(unsigned int, min(len, char_count),
985 rx_bufsize - new_rx_get);
987 memcpy_fromio(buf, cinfo->base_addr +
988 rx_bufaddr + new_rx_get, len);
990 new_rx_get = (new_rx_get + len) &
993 info->icount.rx += len;
994 info->idle_stats.recv_bytes += len;
997 len = tty_buffer_request_room(tty, char_count);
999 data = readb(cinfo->base_addr + rx_bufaddr +
1001 new_rx_get = (new_rx_get + 1) &
1003 tty_insert_flip_char(tty, data, TTY_NORMAL);
1004 info->idle_stats.recv_bytes++;
1008 #ifdef CONFIG_CYZ_INTR
1009 /* Recalculate the number of chars in the RX buffer and issue
1010 a cmd in case it's higher than the RX high water mark */
1011 rx_put = readl(&buf_ctrl->rx_put);
1012 if (rx_put >= rx_get)
1013 char_count = rx_put - rx_get;
1015 char_count = rx_put - rx_get + rx_bufsize;
1016 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1017 !timer_pending(&cyz_rx_full_timer[
1019 mod_timer(&cyz_rx_full_timer[info->line],
1022 info->idle_stats.recv_idle = jiffies;
1023 tty_schedule_flip(tty);
1026 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1030 static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
1032 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1033 struct cyclades_card *cinfo = info->card;
1035 unsigned int char_count;
1039 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1041 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1044 tx_get = readl(&buf_ctrl->tx_get);
1045 tx_put = readl(&buf_ctrl->tx_put);
1046 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1047 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1048 if (tx_put >= tx_get)
1049 char_count = tx_get - tx_put - 1 + tx_bufsize;
1051 char_count = tx_get - tx_put - 1;
1058 if (info->x_char) { /* send special char */
1059 data = info->x_char;
1061 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1062 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1068 while (0 < (small_count = min_t(unsigned int,
1069 tx_bufsize - tx_put, min_t(unsigned int,
1070 (SERIAL_XMIT_SIZE - info->xmit_tail),
1071 min_t(unsigned int, info->xmit_cnt,
1074 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1076 &info->port.xmit_buf[info->xmit_tail],
1079 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1080 char_count -= small_count;
1081 info->icount.tx += small_count;
1082 info->xmit_cnt -= small_count;
1083 info->xmit_tail = (info->xmit_tail + small_count) &
1084 (SERIAL_XMIT_SIZE - 1);
1087 while (info->xmit_cnt && char_count) {
1088 data = info->port.xmit_buf[info->xmit_tail];
1090 info->xmit_tail = (info->xmit_tail + 1) &
1091 (SERIAL_XMIT_SIZE - 1);
1093 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1094 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1102 cy_writel(&buf_ctrl->tx_put, tx_put);
1106 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1108 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1109 struct tty_struct *tty;
1110 struct cyclades_port *info;
1111 __u32 channel, param, fw_ver;
1116 fw_ver = readl(&board_ctrl->fw_version);
1118 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1121 info = &cinfo->ports[channel];
1122 tty = tty_port_tty_get(&info->port);
1128 tty_insert_flip_char(tty, 0, TTY_PARITY);
1133 tty_insert_flip_char(tty, 0, TTY_FRAME);
1138 tty_insert_flip_char(tty, 0, TTY_BREAK);
1145 if (info->port.flags & ASYNC_CHECK_CD) {
1146 u32 dcd = fw_ver > 241 ? param :
1147 readl(&info->u.cyz.ch_ctrl->rs_status);
1149 wake_up_interruptible(&info->port.open_wait);
1168 complete(&info->shutdown_wait);
1171 #ifdef CONFIG_CYZ_INTR
1175 /* Reception Interrupt */
1176 #ifdef CY_DEBUG_INTERRUPTS
1177 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1178 "port %ld\n", info->card, channel);
1180 cyz_handle_rx(info, tty);
1185 /* Transmission Interrupt */
1186 #ifdef CY_DEBUG_INTERRUPTS
1187 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1188 "port %ld\n", info->card, channel);
1190 cyz_handle_tx(info, tty);
1192 #endif /* CONFIG_CYZ_INTR */
1194 /* should do something with this !!! */
1200 wake_up_interruptible(&info->delta_msr_wait);
1202 tty_schedule_flip(tty);
1207 #ifdef CONFIG_CYZ_INTR
1208 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1210 struct cyclades_card *cinfo = dev_id;
1212 if (unlikely(!cyz_is_loaded(cinfo))) {
1213 #ifdef CY_DEBUG_INTERRUPTS
1214 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1220 /* Handle the interrupts */
1221 cyz_handle_cmd(cinfo);
1224 } /* cyz_interrupt */
1226 static void cyz_rx_restart(unsigned long arg)
1228 struct cyclades_port *info = (struct cyclades_port *)arg;
1229 struct cyclades_card *card = info->card;
1231 __u32 channel = info->line - card->first_line;
1232 unsigned long flags;
1234 spin_lock_irqsave(&card->card_lock, flags);
1235 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1237 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1238 info->line, retval);
1240 spin_unlock_irqrestore(&card->card_lock, flags);
1243 #else /* CONFIG_CYZ_INTR */
1245 static void cyz_poll(unsigned long arg)
1247 struct cyclades_card *cinfo;
1248 struct cyclades_port *info;
1249 unsigned long expires = jiffies + HZ;
1250 unsigned int port, card;
1252 for (card = 0; card < NR_CARDS; card++) {
1253 cinfo = &cy_card[card];
1255 if (!cy_is_Z(cinfo))
1257 if (!cyz_is_loaded(cinfo))
1260 /* Skip first polling cycle to avoid racing conditions with the FW */
1261 if (!cinfo->intr_enabled) {
1262 cinfo->intr_enabled = 1;
1266 cyz_handle_cmd(cinfo);
1268 for (port = 0; port < cinfo->nports; port++) {
1269 struct tty_struct *tty;
1271 info = &cinfo->ports[port];
1272 tty = tty_port_tty_get(&info->port);
1273 /* OK to pass NULL to the handle functions below.
1274 They need to drop the data in that case. */
1276 if (!info->throttle)
1277 cyz_handle_rx(info, tty);
1278 cyz_handle_tx(info, tty);
1281 /* poll every 'cyz_polling_cycle' period */
1282 expires = jiffies + cyz_polling_cycle;
1284 mod_timer(&cyz_timerlist, expires);
1287 #endif /* CONFIG_CYZ_INTR */
1289 /********** End of block of Cyclades-Z specific code *********/
1290 /***********************************************************/
1292 /* This is called whenever a port becomes active;
1293 interrupts are enabled and DTR & RTS are turned on.
1295 static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1297 struct cyclades_card *card;
1298 unsigned long flags;
1304 channel = info->line - card->first_line;
1306 page = get_zeroed_page(GFP_KERNEL);
1310 spin_lock_irqsave(&card->card_lock, flags);
1312 if (info->port.flags & ASYNC_INITIALIZED)
1316 set_bit(TTY_IO_ERROR, &tty->flags);
1320 if (info->port.xmit_buf)
1323 info->port.xmit_buf = (unsigned char *)page;
1325 spin_unlock_irqrestore(&card->card_lock, flags);
1327 cy_set_line_char(info, tty);
1329 if (!cy_is_Z(card)) {
1332 spin_lock_irqsave(&card->card_lock, flags);
1334 cyy_writeb(info, CyCAR, channel);
1336 cyy_writeb(info, CyRTPR,
1337 (info->default_timeout ? info->default_timeout : 0x02));
1338 /* 10ms rx timeout */
1340 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1342 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1344 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
1346 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1348 if (!cyz_is_loaded(card))
1351 #ifdef CY_DEBUG_OPEN
1352 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1353 "base_addr %p\n", card, channel, card->base_addr);
1355 spin_lock_irqsave(&card->card_lock, flags);
1357 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1359 #ifdef CONFIG_CYZ_INTR
1360 cy_writel(&ch_ctrl->intr_enable,
1361 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1362 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1364 cy_writel(&ch_ctrl->intr_enable,
1365 C_IN_IOCTLW | C_IN_MDCD);
1366 #endif /* CONFIG_CYZ_INTR */
1368 #ifdef CONFIG_CYZ_INTR
1369 cy_writel(&ch_ctrl->intr_enable,
1370 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1371 C_IN_RXNNDT | C_IN_MDCD);
1373 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
1374 #endif /* CONFIG_CYZ_INTR */
1377 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1379 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1380 "%x\n", info->line, retval);
1383 /* Flush RX buffers before raising DTR and RTS */
1384 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1386 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1387 "%x\n", info->line, retval);
1390 /* set timeout !!! */
1391 /* set RTS and DTR !!! */
1392 tty_port_raise_dtr_rts(&info->port);
1394 /* enable send, recv, modem !!! */
1397 info->port.flags |= ASYNC_INITIALIZED;
1399 clear_bit(TTY_IO_ERROR, &tty->flags);
1400 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1401 info->breakon = info->breakoff = 0;
1402 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1403 info->idle_stats.in_use =
1404 info->idle_stats.recv_idle =
1405 info->idle_stats.xmit_idle = jiffies;
1407 spin_unlock_irqrestore(&card->card_lock, flags);
1409 #ifdef CY_DEBUG_OPEN
1410 printk(KERN_DEBUG "cyc startup done\n");
1415 spin_unlock_irqrestore(&card->card_lock, flags);
1420 static void start_xmit(struct cyclades_port *info)
1422 struct cyclades_card *card = info->card;
1423 unsigned long flags;
1424 int channel = info->line - card->first_line;
1426 if (!cy_is_Z(card)) {
1427 spin_lock_irqsave(&card->card_lock, flags);
1428 cyy_writeb(info, CyCAR, channel & 0x03);
1429 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
1430 spin_unlock_irqrestore(&card->card_lock, flags);
1432 #ifdef CONFIG_CYZ_INTR
1435 spin_lock_irqsave(&card->card_lock, flags);
1436 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
1438 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1439 "%x\n", info->line, retval);
1441 spin_unlock_irqrestore(&card->card_lock, flags);
1442 #else /* CONFIG_CYZ_INTR */
1443 /* Don't have to do anything at this time */
1444 #endif /* CONFIG_CYZ_INTR */
1449 * This routine shuts down a serial port; interrupts are disabled,
1450 * and DTR is dropped if the hangup on close termio flag is on.
1452 static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1454 struct cyclades_card *card;
1455 unsigned long flags;
1458 if (!(info->port.flags & ASYNC_INITIALIZED))
1462 channel = info->line - card->first_line;
1463 if (!cy_is_Z(card)) {
1464 spin_lock_irqsave(&card->card_lock, flags);
1466 /* Clear delta_msr_wait queue to avoid mem leaks. */
1467 wake_up_interruptible(&info->delta_msr_wait);
1469 if (info->port.xmit_buf) {
1470 unsigned char *temp;
1471 temp = info->port.xmit_buf;
1472 info->port.xmit_buf = NULL;
1473 free_page((unsigned long)temp);
1475 if (tty->termios->c_cflag & HUPCL)
1476 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1478 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
1479 /* it may be appropriate to clear _XMIT at
1480 some later date (after testing)!!! */
1482 set_bit(TTY_IO_ERROR, &tty->flags);
1483 info->port.flags &= ~ASYNC_INITIALIZED;
1484 spin_unlock_irqrestore(&card->card_lock, flags);
1486 #ifdef CY_DEBUG_OPEN
1487 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
1488 "base_addr %p\n", card, channel, card->base_addr);
1491 if (!cyz_is_loaded(card))
1494 spin_lock_irqsave(&card->card_lock, flags);
1496 if (info->port.xmit_buf) {
1497 unsigned char *temp;
1498 temp = info->port.xmit_buf;
1499 info->port.xmit_buf = NULL;
1500 free_page((unsigned long)temp);
1503 if (tty->termios->c_cflag & HUPCL)
1504 tty_port_lower_dtr_rts(&info->port);
1506 set_bit(TTY_IO_ERROR, &tty->flags);
1507 info->port.flags &= ~ASYNC_INITIALIZED;
1509 spin_unlock_irqrestore(&card->card_lock, flags);
1512 #ifdef CY_DEBUG_OPEN
1513 printk(KERN_DEBUG "cyc shutdown done\n");
1518 * ------------------------------------------------------------
1519 * cy_open() and friends
1520 * ------------------------------------------------------------
1524 * This routine is called whenever a serial port is opened. It
1525 * performs the serial-specific initialization for the tty structure.
1527 static int cy_open(struct tty_struct *tty, struct file *filp)
1529 struct cyclades_port *info;
1530 unsigned int i, line;
1534 if (tty->index < 0 || NR_PORTS <= line)
1537 for (i = 0; i < NR_CARDS; i++)
1538 if (line < cy_card[i].first_line + cy_card[i].nports &&
1539 line >= cy_card[i].first_line)
1543 info = &cy_card[i].ports[line - cy_card[i].first_line];
1547 /* If the card's firmware hasn't been loaded,
1548 treat it as absent from the system. This
1549 will make the user pay attention.
1551 if (cy_is_Z(info->card)) {
1552 struct cyclades_card *cinfo = info->card;
1553 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1555 if (!cyz_is_loaded(cinfo)) {
1556 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
1557 readl(&firm_id->signature) ==
1559 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1560 "need an external power supply for "
1561 "this number of ports.\nFirmware "
1564 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1569 #ifdef CONFIG_CYZ_INTR
1571 /* In case this Z board is operating in interrupt mode, its
1572 interrupts should be enabled as soon as the first open
1573 happens to one of its ports. */
1574 if (!cinfo->intr_enabled) {
1577 /* Enable interrupts on the PLX chip */
1578 intr = readw(&cinfo->ctl_addr.p9060->
1579 intr_ctrl_stat) | 0x0900;
1580 cy_writew(&cinfo->ctl_addr.p9060->
1581 intr_ctrl_stat, intr);
1582 /* Enable interrupts on the FW */
1583 retval = cyz_issue_cmd(cinfo, 0,
1586 printk(KERN_ERR "cyc:IRQ enable retval "
1587 "was %x\n", retval);
1589 cinfo->intr_enabled = 1;
1592 #endif /* CONFIG_CYZ_INTR */
1593 /* Make sure this Z port really exists in hardware */
1594 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1597 #ifdef CY_DEBUG_OTHER
1598 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1600 tty->driver_data = info;
1601 if (serial_paranoia_check(info, tty->name, "cy_open"))
1604 #ifdef CY_DEBUG_OPEN
1605 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
1609 #ifdef CY_DEBUG_COUNT
1610 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
1611 current->pid, info->port.count);
1615 * If the port is the middle of closing, bail out now
1617 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
1618 wait_event_interruptible(info->port.close_wait,
1619 !(info->port.flags & ASYNC_CLOSING));
1620 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1624 * Start up serial port
1626 retval = cy_startup(info, tty);
1630 retval = tty_port_block_til_ready(&info->port, tty, filp);
1632 #ifdef CY_DEBUG_OPEN
1633 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1634 "with %d\n", retval);
1640 tty_port_tty_set(&info->port, tty);
1642 #ifdef CY_DEBUG_OPEN
1643 printk(KERN_DEBUG "cyc:cy_open done\n");
1649 * cy_wait_until_sent() --- wait until the transmitter is empty
1651 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1653 struct cyclades_card *card;
1654 struct cyclades_port *info = tty->driver_data;
1655 unsigned long orig_jiffies;
1658 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1661 if (info->xmit_fifo_size == 0)
1662 return; /* Just in case.... */
1664 orig_jiffies = jiffies;
1667 * Set the check interval to be 1/5 of the estimated time to
1668 * send a single character, and make it at least 1. The check
1669 * interval should also be less than the timeout.
1671 * Note: we have to use pretty tight timings here to satisfy
1674 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1675 char_time = char_time / 5;
1681 char_time = min(char_time, timeout);
1683 * If the transmitter hasn't cleared in twice the approximate
1684 * amount of time to send the entire FIFO, it probably won't
1685 * ever clear. This assumes the UART isn't doing flow
1686 * control, which is currently the case. Hence, if it ever
1687 * takes longer than info->timeout, this is probably due to a
1688 * UART bug of some kind. So, we clamp the timeout parameter at
1691 if (!timeout || timeout > 2 * info->timeout)
1692 timeout = 2 * info->timeout;
1693 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1694 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
1695 timeout, char_time, jiffies);
1698 if (!cy_is_Z(card)) {
1699 while (cyy_readb(info, CySRER) & CyTxRdy) {
1700 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1701 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1703 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1705 if (timeout && time_after(jiffies, orig_jiffies +
1710 /* Run one more char cycle */
1711 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1713 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
1714 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1718 static void cy_flush_buffer(struct tty_struct *tty)
1720 struct cyclades_port *info = tty->driver_data;
1721 struct cyclades_card *card;
1722 int channel, retval;
1723 unsigned long flags;
1726 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1729 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1733 channel = info->line - card->first_line;
1735 spin_lock_irqsave(&card->card_lock, flags);
1736 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1737 spin_unlock_irqrestore(&card->card_lock, flags);
1739 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
1741 spin_lock_irqsave(&card->card_lock, flags);
1742 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1744 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1745 "was %x\n", info->line, retval);
1747 spin_unlock_irqrestore(&card->card_lock, flags);
1750 } /* cy_flush_buffer */
1754 * This routine is called when a particular tty device is closed.
1756 static void cy_close(struct tty_struct *tty, struct file *filp)
1758 struct cyclades_port *info = tty->driver_data;
1759 struct cyclades_card *card;
1760 unsigned long flags;
1763 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1768 if (!tty_port_close_start(&info->port, tty, filp))
1771 channel = info->line - card->first_line;
1772 spin_lock_irqsave(&card->card_lock, flags);
1774 if (!cy_is_Z(card)) {
1775 /* Stop accepting input */
1776 cyy_writeb(info, CyCAR, channel & 0x03);
1777 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
1778 if (info->port.flags & ASYNC_INITIALIZED) {
1779 /* Waiting for on-board buffers to be empty before
1781 spin_unlock_irqrestore(&card->card_lock, flags);
1782 cy_wait_until_sent(tty, info->timeout);
1783 spin_lock_irqsave(&card->card_lock, flags);
1787 /* Waiting for on-board buffers to be empty before closing
1789 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1792 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
1793 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
1795 printk(KERN_DEBUG "cyc:cy_close retval on "
1796 "ttyC%d was %x\n", info->line, retval);
1798 spin_unlock_irqrestore(&card->card_lock, flags);
1799 wait_for_completion_interruptible(&info->shutdown_wait);
1800 spin_lock_irqsave(&card->card_lock, flags);
1805 spin_unlock_irqrestore(&card->card_lock, flags);
1806 cy_shutdown(info, tty);
1807 cy_flush_buffer(tty);
1809 tty_port_tty_set(&info->port, NULL);
1811 tty_port_close_end(&info->port, tty);
1814 /* This routine gets called when tty_write has put something into
1815 * the write_queue. The characters may come from user space or
1818 * This routine will return the number of characters actually
1819 * accepted for writing.
1821 * If the port is not already transmitting stuff, start it off by
1822 * enabling interrupts. The interrupt service routine will then
1823 * ensure that the characters are sent.
1824 * If the port is already active, there is no need to kick it.
1827 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1829 struct cyclades_port *info = tty->driver_data;
1830 unsigned long flags;
1834 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1837 if (serial_paranoia_check(info, tty->name, "cy_write"))
1840 if (!info->port.xmit_buf)
1843 spin_lock_irqsave(&info->card->card_lock, flags);
1845 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1846 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
1851 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1852 info->xmit_head = (info->xmit_head + c) &
1853 (SERIAL_XMIT_SIZE - 1);
1854 info->xmit_cnt += c;
1859 spin_unlock_irqrestore(&info->card->card_lock, flags);
1861 info->idle_stats.xmit_bytes += ret;
1862 info->idle_stats.xmit_idle = jiffies;
1864 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1871 * This routine is called by the kernel to write a single
1872 * character to the tty device. If the kernel uses this routine,
1873 * it must call the flush_chars() routine (if defined) when it is
1874 * done stuffing characters into the driver. If there is no room
1875 * in the queue, the character is ignored.
1877 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1879 struct cyclades_port *info = tty->driver_data;
1880 unsigned long flags;
1883 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1886 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1889 if (!info->port.xmit_buf)
1892 spin_lock_irqsave(&info->card->card_lock, flags);
1893 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
1894 spin_unlock_irqrestore(&info->card->card_lock, flags);
1898 info->port.xmit_buf[info->xmit_head++] = ch;
1899 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1901 info->idle_stats.xmit_bytes++;
1902 info->idle_stats.xmit_idle = jiffies;
1903 spin_unlock_irqrestore(&info->card->card_lock, flags);
1908 * This routine is called by the kernel after it has written a
1909 * series of characters to the tty device using put_char().
1911 static void cy_flush_chars(struct tty_struct *tty)
1913 struct cyclades_port *info = tty->driver_data;
1916 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1919 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1922 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1923 !info->port.xmit_buf)
1927 } /* cy_flush_chars */
1930 * This routine returns the numbers of characters the tty driver
1931 * will accept for queuing to be written. This number is subject
1932 * to change as output buffers get emptied, or if the output flow
1933 * control is activated.
1935 static int cy_write_room(struct tty_struct *tty)
1937 struct cyclades_port *info = tty->driver_data;
1941 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1944 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1946 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1950 } /* cy_write_room */
1952 static int cy_chars_in_buffer(struct tty_struct *tty)
1954 struct cyclades_port *info = tty->driver_data;
1956 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1959 #ifdef Z_EXT_CHARS_IN_BUFFER
1960 if (!cy_is_Z(info->card)) {
1961 #endif /* Z_EXT_CHARS_IN_BUFFER */
1963 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1964 info->line, info->xmit_cnt);
1966 return info->xmit_cnt;
1967 #ifdef Z_EXT_CHARS_IN_BUFFER
1969 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1971 __u32 tx_put, tx_get, tx_bufsize;
1974 tx_get = readl(&buf_ctrl->tx_get);
1975 tx_put = readl(&buf_ctrl->tx_put);
1976 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1977 if (tx_put >= tx_get)
1978 char_count = tx_put - tx_get;
1980 char_count = tx_put - tx_get + tx_bufsize;
1982 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1983 info->line, info->xmit_cnt + char_count);
1986 return info->xmit_cnt + char_count;
1988 #endif /* Z_EXT_CHARS_IN_BUFFER */
1989 } /* cy_chars_in_buffer */
1992 * ------------------------------------------------------------
1993 * cy_ioctl() and friends
1994 * ------------------------------------------------------------
1997 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1999 int co, co_val, bpr;
2000 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
2004 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2008 /* determine which prescaler to use */
2009 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2010 if (cy_clock / co_val / baud > 63)
2014 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2018 info->tbpr = info->rbpr = bpr;
2019 info->tco = info->rco = co;
2023 * This routine finds or computes the various line characteristics.
2024 * It used to be called config_setup
2026 static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
2028 struct cyclades_card *card;
2029 unsigned long flags;
2031 unsigned cflag, iflag;
2032 int baud, baud_rate = 0;
2035 if (!tty->termios) /* XXX can this happen at all? */
2038 if (info->line == -1)
2041 cflag = tty->termios->c_cflag;
2042 iflag = tty->termios->c_iflag;
2045 * Set up the tty->alt_speed kludge
2047 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2048 tty->alt_speed = 57600;
2049 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2050 tty->alt_speed = 115200;
2051 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2052 tty->alt_speed = 230400;
2053 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2054 tty->alt_speed = 460800;
2057 channel = info->line - card->first_line;
2059 if (!cy_is_Z(card)) {
2063 baud = tty_get_baud_rate(tty);
2064 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2066 if (info->custom_divisor)
2067 baud_rate = info->baud / info->custom_divisor;
2069 baud_rate = info->baud;
2070 } else if (baud > CD1400_MAX_SPEED) {
2071 baud = CD1400_MAX_SPEED;
2073 /* find the baud index */
2074 for (i = 0; i < 20; i++) {
2075 if (baud == baud_table[i])
2079 i = 19; /* CD1400_MAX_SPEED */
2081 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2083 cyy_baud_calc(info, baud_rate);
2085 if (info->chip_rev >= CD1400_REV_J) {
2086 /* It is a CD1400 rev. J or later */
2087 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2088 info->tco = baud_co_60[i]; /* Tx CO */
2089 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2090 info->rco = baud_co_60[i]; /* Rx CO */
2092 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2093 info->tco = baud_co_25[i]; /* Tx CO */
2094 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2095 info->rco = baud_co_25[i]; /* Rx CO */
2098 if (baud_table[i] == 134) {
2099 /* get it right for 134.5 baud */
2100 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2102 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2104 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2106 } else if (baud_table[i]) {
2107 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2109 /* this needs to be propagated into the card info */
2113 /* By tradition (is it a standard?) a baud rate of zero
2114 implies the line should be/has been closed. A bit
2115 later in this routine such a test is performed. */
2117 /* byte size and parity */
2120 /* receive threshold */
2121 info->cor3 = (info->default_threshold ?
2122 info->default_threshold : baud_cor3[i]);
2124 switch (cflag & CSIZE) {
2126 info->cor1 = Cy_5_BITS;
2129 info->cor1 = Cy_6_BITS;
2132 info->cor1 = Cy_7_BITS;
2135 info->cor1 = Cy_8_BITS;
2139 info->cor1 |= Cy_2_STOP;
2141 if (cflag & PARENB) {
2143 info->cor1 |= CyPARITY_O;
2145 info->cor1 |= CyPARITY_E;
2147 info->cor1 |= CyPARITY_NONE;
2149 /* CTS flow control flag */
2150 if (cflag & CRTSCTS) {
2151 info->port.flags |= ASYNC_CTS_FLOW;
2152 info->cor2 |= CyCtsAE;
2154 info->port.flags &= ~ASYNC_CTS_FLOW;
2155 info->cor2 &= ~CyCtsAE;
2158 info->port.flags &= ~ASYNC_CHECK_CD;
2160 info->port.flags |= ASYNC_CHECK_CD;
2162 /***********************************************
2163 The hardware option, CyRtsAO, presents RTS when
2164 the chip has characters to send. Since most modems
2165 use RTS as reverse (inbound) flow control, this
2166 option is not used. If inbound flow control is
2167 necessary, DTR can be programmed to provide the
2168 appropriate signals for use with a non-standard
2169 cable. Contact Marcio Saito for details.
2170 ***********************************************/
2174 spin_lock_irqsave(&card->card_lock, flags);
2175 cyy_writeb(info, CyCAR, channel);
2177 /* tx and rx baud rate */
2179 cyy_writeb(info, CyTCOR, info->tco);
2180 cyy_writeb(info, CyTBPR, info->tbpr);
2181 cyy_writeb(info, CyRCOR, info->rco);
2182 cyy_writeb(info, CyRBPR, info->rbpr);
2184 /* set line characteristics according configuration */
2186 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2187 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2188 cyy_writeb(info, CyCOR1, info->cor1);
2189 cyy_writeb(info, CyCOR2, info->cor2);
2190 cyy_writeb(info, CyCOR3, info->cor3);
2191 cyy_writeb(info, CyCOR4, info->cor4);
2192 cyy_writeb(info, CyCOR5, info->cor5);
2194 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2197 /* !!! Is this needed? */
2198 cyy_writeb(info, CyCAR, channel);
2199 cyy_writeb(info, CyRTPR,
2200 (info->default_timeout ? info->default_timeout : 0x02));
2201 /* 10ms rx timeout */
2205 cflags |= CyDSR | CyRI | CyDCD;
2206 /* without modem intr */
2207 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2208 /* act on 1->0 modem transitions */
2209 if ((cflag & CRTSCTS) && info->rflow)
2210 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2212 cyy_writeb(info, CyMCOR1, cflags);
2213 /* act on 0->1 modem transitions */
2214 cyy_writeb(info, CyMCOR2, cflags);
2216 if (i == 0) /* baud rate is zero, turn off line */
2217 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2219 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
2221 clear_bit(TTY_IO_ERROR, &tty->flags);
2222 spin_unlock_irqrestore(&card->card_lock, flags);
2225 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2229 if (!cyz_is_loaded(card))
2233 baud = tty_get_baud_rate(tty);
2234 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2236 if (info->custom_divisor)
2237 baud_rate = info->baud / info->custom_divisor;
2239 baud_rate = info->baud;
2240 } else if (baud > CYZ_MAX_SPEED) {
2241 baud = CYZ_MAX_SPEED;
2243 cy_writel(&ch_ctrl->comm_baud, baud);
2246 /* get it right for 134.5 baud */
2247 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2249 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2251 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2254 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2256 /* this needs to be propagated into the card info */
2261 /* byte size and parity */
2262 switch (cflag & CSIZE) {
2264 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2267 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2270 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2273 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2276 if (cflag & CSTOPB) {
2277 cy_writel(&ch_ctrl->comm_data_l,
2278 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
2280 cy_writel(&ch_ctrl->comm_data_l,
2281 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
2283 if (cflag & PARENB) {
2285 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
2287 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
2289 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
2291 /* CTS flow control flag */
2292 if (cflag & CRTSCTS) {
2293 cy_writel(&ch_ctrl->hw_flow,
2294 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
2296 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2297 ~(C_RS_CTS | C_RS_RTS));
2299 /* As the HW flow control is done in firmware, the driver
2300 doesn't need to care about it */
2301 info->port.flags &= ~ASYNC_CTS_FLOW;
2303 /* XON/XOFF/XANY flow control flags */
2306 sw_flow |= C_FL_OXX;
2308 sw_flow |= C_FL_OIXANY;
2310 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2312 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2314 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2315 "was %x\n", info->line, retval);
2318 /* CD sensitivity */
2320 info->port.flags &= ~ASYNC_CHECK_CD;
2322 info->port.flags |= ASYNC_CHECK_CD;
2324 if (baud == 0) { /* baud rate is zero, turn off line */
2325 cy_writel(&ch_ctrl->rs_control,
2326 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
2328 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
2331 cy_writel(&ch_ctrl->rs_control,
2332 readl(&ch_ctrl->rs_control) | C_RS_DTR);
2334 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
2338 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2340 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2341 "was %x\n", info->line, retval);
2344 clear_bit(TTY_IO_ERROR, &tty->flags);
2346 } /* set_line_char */
2348 static int cy_get_serial_info(struct cyclades_port *info,
2349 struct serial_struct __user *retinfo)
2351 struct cyclades_card *cinfo = info->card;
2352 struct serial_struct tmp = {
2355 .port = (info->card - cy_card) * 0x100 + info->line -
2358 .flags = info->port.flags,
2359 .close_delay = info->port.close_delay,
2360 .closing_wait = info->port.closing_wait,
2361 .baud_base = info->baud,
2362 .custom_divisor = info->custom_divisor,
2365 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2369 cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
2370 struct serial_struct __user *new_info)
2372 struct serial_struct new_serial;
2374 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2377 if (!capable(CAP_SYS_ADMIN)) {
2378 if (new_serial.close_delay != info->port.close_delay ||
2379 new_serial.baud_base != info->baud ||
2380 (new_serial.flags & ASYNC_FLAGS &
2382 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
2384 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
2385 (new_serial.flags & ASYNC_USR_MASK);
2386 info->baud = new_serial.baud_base;
2387 info->custom_divisor = new_serial.custom_divisor;
2388 goto check_and_exit;
2392 * OK, past this point, all the error checking has been done.
2393 * At this point, we start making changes.....
2396 info->baud = new_serial.baud_base;
2397 info->custom_divisor = new_serial.custom_divisor;
2398 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
2399 (new_serial.flags & ASYNC_FLAGS);
2400 info->port.close_delay = new_serial.close_delay * HZ / 100;
2401 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
2404 if (info->port.flags & ASYNC_INITIALIZED) {
2405 cy_set_line_char(info, tty);
2408 return cy_startup(info, tty);
2410 } /* set_serial_info */
2413 * get_lsr_info - get line status register info
2415 * Purpose: Let user call ioctl() to get info when the UART physically
2416 * is emptied. On bus types like RS485, the transmitter must
2417 * release the bus after transmitting. This must be done when
2418 * the transmit shift register is empty, not be done when the
2419 * transmit holding register is empty. This functionality
2420 * allows an RS485 driver to be written in user space.
2422 static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
2424 struct cyclades_card *card = info->card;
2425 unsigned int result;
2426 unsigned long flags;
2429 if (!cy_is_Z(card)) {
2430 spin_lock_irqsave(&card->card_lock, flags);
2431 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
2432 spin_unlock_irqrestore(&card->card_lock, flags);
2433 result = (status ? 0 : TIOCSER_TEMT);
2435 /* Not supported yet */
2438 return put_user(result, (unsigned long __user *)value);
2441 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
2443 struct cyclades_port *info = tty->driver_data;
2444 struct cyclades_card *card;
2447 if (serial_paranoia_check(info, tty->name, __func__))
2453 if (!cy_is_Z(card)) {
2454 unsigned long flags;
2455 int channel = info->line - card->first_line;
2458 spin_lock_irqsave(&card->card_lock, flags);
2459 cyy_writeb(info, CyCAR, channel & 0x03);
2460 status = cyy_readb(info, CyMSVR1);
2461 status |= cyy_readb(info, CyMSVR2);
2462 spin_unlock_irqrestore(&card->card_lock, flags);
2464 if (info->rtsdtr_inv) {
2465 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2466 ((status & CyDTR) ? TIOCM_RTS : 0);
2468 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2469 ((status & CyDTR) ? TIOCM_DTR : 0);
2471 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2472 ((status & CyRI) ? TIOCM_RNG : 0) |
2473 ((status & CyDSR) ? TIOCM_DSR : 0) |
2474 ((status & CyCTS) ? TIOCM_CTS : 0);
2478 if (!cyz_is_loaded(card)) {
2483 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2484 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2485 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2486 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2487 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2488 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2489 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
2497 cy_tiocmset(struct tty_struct *tty, struct file *file,
2498 unsigned int set, unsigned int clear)
2500 struct cyclades_port *info = tty->driver_data;
2501 struct cyclades_card *card;
2502 unsigned long flags;
2504 if (serial_paranoia_check(info, tty->name, __func__))
2508 if (!cy_is_Z(card)) {
2509 spin_lock_irqsave(&card->card_lock, flags);
2510 cyy_change_rts_dtr(info, set, clear);
2511 spin_unlock_irqrestore(&card->card_lock, flags);
2513 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2514 int retval, channel = info->line - card->first_line;
2517 if (!cyz_is_loaded(card))
2520 spin_lock_irqsave(&card->card_lock, flags);
2521 rs = readl(&ch_ctrl->rs_control);
2522 if (set & TIOCM_RTS)
2524 if (clear & TIOCM_RTS)
2526 if (set & TIOCM_DTR) {
2529 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
2532 if (clear & TIOCM_DTR) {
2535 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2539 cy_writel(&ch_ctrl->rs_control, rs);
2540 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2541 spin_unlock_irqrestore(&card->card_lock, flags);
2543 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2544 "was %x\n", info->line, retval);
2551 * cy_break() --- routine which turns the break handling on or off
2553 static int cy_break(struct tty_struct *tty, int break_state)
2555 struct cyclades_port *info = tty->driver_data;
2556 struct cyclades_card *card;
2557 unsigned long flags;
2560 if (serial_paranoia_check(info, tty->name, "cy_break"))
2565 spin_lock_irqsave(&card->card_lock, flags);
2566 if (!cy_is_Z(card)) {
2567 /* Let the transmit ISR take care of this (since it
2568 requires stuffing characters into the output stream).
2570 if (break_state == -1) {
2571 if (!info->breakon) {
2573 if (!info->xmit_cnt) {
2574 spin_unlock_irqrestore(&card->card_lock, flags);
2576 spin_lock_irqsave(&card->card_lock, flags);
2580 if (!info->breakoff) {
2582 if (!info->xmit_cnt) {
2583 spin_unlock_irqrestore(&card->card_lock, flags);
2585 spin_lock_irqsave(&card->card_lock, flags);
2590 if (break_state == -1) {
2591 retval = cyz_issue_cmd(card,
2592 info->line - card->first_line,
2593 C_CM_SET_BREAK, 0L);
2595 printk(KERN_ERR "cyc:cy_break (set) retval on "
2596 "ttyC%d was %x\n", info->line, retval);
2599 retval = cyz_issue_cmd(card,
2600 info->line - card->first_line,
2601 C_CM_CLR_BREAK, 0L);
2603 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2604 "on ttyC%d was %x\n", info->line,
2609 spin_unlock_irqrestore(&card->card_lock, flags);
2613 static int set_threshold(struct cyclades_port *info, unsigned long value)
2615 struct cyclades_card *card = info->card;
2616 unsigned long flags;
2618 if (!cy_is_Z(card)) {
2619 info->cor3 &= ~CyREC_FIFO;
2620 info->cor3 |= value & CyREC_FIFO;
2622 spin_lock_irqsave(&card->card_lock, flags);
2623 cyy_writeb(info, CyCOR3, info->cor3);
2624 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
2625 spin_unlock_irqrestore(&card->card_lock, flags);
2628 } /* set_threshold */
2630 static int get_threshold(struct cyclades_port *info,
2631 unsigned long __user *value)
2633 struct cyclades_card *card = info->card;
2635 if (!cy_is_Z(card)) {
2636 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
2637 return put_user(tmp, value);
2640 } /* get_threshold */
2642 static int set_timeout(struct cyclades_port *info, unsigned long value)
2644 struct cyclades_card *card = info->card;
2645 unsigned long flags;
2647 if (!cy_is_Z(card)) {
2648 spin_lock_irqsave(&card->card_lock, flags);
2649 cyy_writeb(info, CyRTPR, value & 0xff);
2650 spin_unlock_irqrestore(&card->card_lock, flags);
2655 static int get_timeout(struct cyclades_port *info,
2656 unsigned long __user *value)
2658 struct cyclades_card *card = info->card;
2660 if (!cy_is_Z(card)) {
2661 u8 tmp = cyy_readb(info, CyRTPR);
2662 return put_user(tmp, value);
2667 static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2668 struct cyclades_icount *cprev)
2670 struct cyclades_icount cnow;
2671 unsigned long flags;
2674 spin_lock_irqsave(&info->card->card_lock, flags);
2675 cnow = info->icount; /* atomic copy */
2676 spin_unlock_irqrestore(&info->card->card_lock, flags);
2678 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2679 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2680 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2681 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2689 * This routine allows the tty driver to implement device-
2690 * specific ioctl's. If the ioctl number passed in cmd is
2691 * not recognized by the driver, it should return ENOIOCTLCMD.
2694 cy_ioctl(struct tty_struct *tty, struct file *file,
2695 unsigned int cmd, unsigned long arg)
2697 struct cyclades_port *info = tty->driver_data;
2698 struct cyclades_icount cnow; /* kernel counter temps */
2700 unsigned long flags;
2701 void __user *argp = (void __user *)arg;
2703 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2706 #ifdef CY_DEBUG_OTHER
2707 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2708 info->line, cmd, arg);
2714 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2718 memset(&info->mon, 0, sizeof(info->mon));
2721 ret_val = get_threshold(info, argp);
2724 ret_val = set_threshold(info, arg);
2726 case CYGETDEFTHRESH:
2727 ret_val = put_user(info->default_threshold,
2728 (unsigned long __user *)argp);
2730 case CYSETDEFTHRESH:
2731 info->default_threshold = arg & 0x0f;
2734 ret_val = get_timeout(info, argp);
2737 ret_val = set_timeout(info, arg);
2739 case CYGETDEFTIMEOUT:
2740 ret_val = put_user(info->default_timeout,
2741 (unsigned long __user *)argp);
2743 case CYSETDEFTIMEOUT:
2744 info->default_timeout = arg & 0xff;
2747 info->rflow = (int)arg;
2750 ret_val = info->rflow;
2752 case CYSETRTSDTR_INV:
2753 info->rtsdtr_inv = (int)arg;
2755 case CYGETRTSDTR_INV:
2756 ret_val = info->rtsdtr_inv;
2758 case CYGETCD1400VER:
2759 ret_val = info->chip_rev;
2761 #ifndef CONFIG_CYZ_INTR
2762 case CYZSETPOLLCYCLE:
2763 cyz_polling_cycle = (arg * HZ) / 1000;
2765 case CYZGETPOLLCYCLE:
2766 ret_val = (cyz_polling_cycle * 1000) / HZ;
2768 #endif /* CONFIG_CYZ_INTR */
2770 info->port.closing_wait = (unsigned short)arg * HZ / 100;
2773 ret_val = info->port.closing_wait / (HZ / 100);
2776 ret_val = cy_get_serial_info(info, argp);
2779 ret_val = cy_set_serial_info(info, tty, argp);
2781 case TIOCSERGETLSR: /* Get line status register */
2782 ret_val = get_lsr_info(info, argp);
2785 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2786 * - mask passed in arg for lines of interest
2787 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2788 * Caller should use TIOCGICOUNT to see which one it was
2791 spin_lock_irqsave(&info->card->card_lock, flags);
2792 /* note the counters on entry */
2793 cnow = info->icount;
2794 spin_unlock_irqrestore(&info->card->card_lock, flags);
2795 ret_val = wait_event_interruptible(info->delta_msr_wait,
2796 cy_cflags_changed(info, arg, &cnow));
2800 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2801 * Return: write counters to the user passed counter struct
2802 * NB: both 1->0 and 0->1 transitions are counted except for
2803 * RI where only 0->1 is counted.
2806 struct serial_icounter_struct sic = { };
2808 spin_lock_irqsave(&info->card->card_lock, flags);
2809 cnow = info->icount;
2810 spin_unlock_irqrestore(&info->card->card_lock, flags);
2818 sic.frame = cnow.frame;
2819 sic.overrun = cnow.overrun;
2820 sic.parity = cnow.parity;
2822 sic.buf_overrun = cnow.buf_overrun;
2824 if (copy_to_user(argp, &sic, sizeof(sic)))
2829 ret_val = -ENOIOCTLCMD;
2833 #ifdef CY_DEBUG_OTHER
2834 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
2840 * This routine allows the tty driver to be notified when
2841 * device's termios settings have changed. Note that a
2842 * well-designed tty driver should be prepared to accept the case
2843 * where old == NULL, and try to do something rational.
2845 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2847 struct cyclades_port *info = tty->driver_data;
2849 #ifdef CY_DEBUG_OTHER
2850 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
2853 cy_set_line_char(info, tty);
2855 if ((old_termios->c_cflag & CRTSCTS) &&
2856 !(tty->termios->c_cflag & CRTSCTS)) {
2857 tty->hw_stopped = 0;
2862 * No need to wake up processes in open wait, since they
2863 * sample the CLOCAL flag once, and don't recheck it.
2864 * XXX It's not clear whether the current behavior is correct
2865 * or not. Hence, this may change.....
2867 if (!(old_termios->c_cflag & CLOCAL) &&
2868 (tty->termios->c_cflag & CLOCAL))
2869 wake_up_interruptible(&info->port.open_wait);
2871 } /* cy_set_termios */
2873 /* This function is used to send a high-priority XON/XOFF character to
2876 static void cy_send_xchar(struct tty_struct *tty, char ch)
2878 struct cyclades_port *info = tty->driver_data;
2879 struct cyclades_card *card;
2882 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
2891 channel = info->line - card->first_line;
2893 if (cy_is_Z(card)) {
2894 if (ch == STOP_CHAR(tty))
2895 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
2896 else if (ch == START_CHAR(tty))
2897 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
2901 /* This routine is called by the upper-layer tty layer to signal
2902 that incoming characters should be throttled because the input
2903 buffers are close to full.
2905 static void cy_throttle(struct tty_struct *tty)
2907 struct cyclades_port *info = tty->driver_data;
2908 struct cyclades_card *card;
2909 unsigned long flags;
2911 #ifdef CY_DEBUG_THROTTLE
2914 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
2915 tty->ldisc.chars_in_buffer(tty), info->line);
2918 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
2925 cy_send_xchar(tty, STOP_CHAR(tty));
2930 if (tty->termios->c_cflag & CRTSCTS) {
2931 if (!cy_is_Z(card)) {
2932 spin_lock_irqsave(&card->card_lock, flags);
2933 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
2934 spin_unlock_irqrestore(&card->card_lock, flags);
2942 * This routine notifies the tty driver that it should signal
2943 * that characters can now be sent to the tty without fear of
2944 * overrunning the input buffers of the line disciplines.
2946 static void cy_unthrottle(struct tty_struct *tty)
2948 struct cyclades_port *info = tty->driver_data;
2949 struct cyclades_card *card;
2950 unsigned long flags;
2952 #ifdef CY_DEBUG_THROTTLE
2955 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
2956 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
2959 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
2966 cy_send_xchar(tty, START_CHAR(tty));
2969 if (tty->termios->c_cflag & CRTSCTS) {
2971 if (!cy_is_Z(card)) {
2972 spin_lock_irqsave(&card->card_lock, flags);
2973 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
2974 spin_unlock_irqrestore(&card->card_lock, flags);
2979 } /* cy_unthrottle */
2981 /* cy_start and cy_stop provide software output flow control as a
2982 function of XON/XOFF, software CTS, and other such stuff.
2984 static void cy_stop(struct tty_struct *tty)
2986 struct cyclades_card *cinfo;
2987 struct cyclades_port *info = tty->driver_data;
2989 unsigned long flags;
2991 #ifdef CY_DEBUG_OTHER
2992 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
2995 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2999 channel = info->line - cinfo->first_line;
3000 if (!cy_is_Z(cinfo)) {
3001 spin_lock_irqsave(&cinfo->card_lock, flags);
3002 cyy_writeb(info, CyCAR, channel & 0x03);
3003 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
3004 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3008 static void cy_start(struct tty_struct *tty)
3010 struct cyclades_card *cinfo;
3011 struct cyclades_port *info = tty->driver_data;
3013 unsigned long flags;
3015 #ifdef CY_DEBUG_OTHER
3016 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
3019 if (serial_paranoia_check(info, tty->name, "cy_start"))
3023 channel = info->line - cinfo->first_line;
3024 if (!cy_is_Z(cinfo)) {
3025 spin_lock_irqsave(&cinfo->card_lock, flags);
3026 cyy_writeb(info, CyCAR, channel & 0x03);
3027 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
3028 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3033 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3035 static void cy_hangup(struct tty_struct *tty)
3037 struct cyclades_port *info = tty->driver_data;
3039 #ifdef CY_DEBUG_OTHER
3040 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
3043 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
3046 cy_flush_buffer(tty);
3047 cy_shutdown(info, tty);
3048 tty_port_hangup(&info->port);
3051 static int cyy_carrier_raised(struct tty_port *port)
3053 struct cyclades_port *info = container_of(port, struct cyclades_port,
3055 struct cyclades_card *cinfo = info->card;
3056 unsigned long flags;
3057 int channel = info->line - cinfo->first_line;
3060 spin_lock_irqsave(&cinfo->card_lock, flags);
3061 cyy_writeb(info, CyCAR, channel & 0x03);
3062 cd = cyy_readb(info, CyMSVR1) & CyDCD;
3063 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3068 static void cyy_dtr_rts(struct tty_port *port, int raise)
3070 struct cyclades_port *info = container_of(port, struct cyclades_port,
3072 struct cyclades_card *cinfo = info->card;
3073 unsigned long flags;
3075 spin_lock_irqsave(&cinfo->card_lock, flags);
3076 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
3077 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
3078 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3081 static int cyz_carrier_raised(struct tty_port *port)
3083 struct cyclades_port *info = container_of(port, struct cyclades_port,
3086 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
3089 static void cyz_dtr_rts(struct tty_port *port, int raise)
3091 struct cyclades_port *info = container_of(port, struct cyclades_port,
3093 struct cyclades_card *cinfo = info->card;
3094 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
3095 int ret, channel = info->line - cinfo->first_line;
3098 rs = readl(&ch_ctrl->rs_control);
3100 rs |= C_RS_RTS | C_RS_DTR;
3102 rs &= ~(C_RS_RTS | C_RS_DTR);
3103 cy_writel(&ch_ctrl->rs_control, rs);
3104 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3106 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3107 __func__, info->line, ret);
3109 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3113 static const struct tty_port_operations cyy_port_ops = {
3114 .carrier_raised = cyy_carrier_raised,
3115 .dtr_rts = cyy_dtr_rts,
3118 static const struct tty_port_operations cyz_port_ops = {
3119 .carrier_raised = cyz_carrier_raised,
3120 .dtr_rts = cyz_dtr_rts,
3124 * ---------------------------------------------------------------------
3125 * cy_init() and friends
3127 * cy_init() is called at boot-time to initialize the serial driver.
3128 * ---------------------------------------------------------------------
3131 static int __devinit cy_init_card(struct cyclades_card *cinfo)
3133 struct cyclades_port *info;
3134 unsigned int channel, port;
3136 spin_lock_init(&cinfo->card_lock);
3137 cinfo->intr_enabled = 0;
3139 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3141 if (cinfo->ports == NULL) {
3142 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3146 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3147 channel++, port++) {
3148 info = &cinfo->ports[channel];
3149 tty_port_init(&info->port);
3150 info->magic = CYCLADES_MAGIC;
3154 info->port.closing_wait = CLOSING_WAIT_DELAY;
3155 info->port.close_delay = 5 * HZ / 10;
3156 info->port.flags = STD_COM_FLAGS;
3157 init_completion(&info->shutdown_wait);
3158 init_waitqueue_head(&info->delta_msr_wait);
3160 if (cy_is_Z(cinfo)) {
3161 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3162 struct ZFW_CTRL *zfw_ctrl;
3164 info->port.ops = &cyz_port_ops;
3165 info->type = PORT_STARTECH;
3167 zfw_ctrl = cinfo->base_addr +
3168 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3169 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3170 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3172 if (cinfo->hw_ver == ZO_V1)
3173 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3175 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
3176 #ifdef CONFIG_CYZ_INTR
3177 setup_timer(&cyz_rx_full_timer[port],
3178 cyz_rx_restart, (unsigned long)info);
3181 unsigned short chip_number;
3182 int index = cinfo->bus_index;
3184 info->port.ops = &cyy_port_ops;
3185 info->type = PORT_CIRRUS;
3186 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3187 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
3189 info->cor3 = 0x08; /* _very_ small rcv threshold */
3191 chip_number = channel / CyPORTS_PER_CHIP;
3192 info->u.cyy.base_addr = cinfo->base_addr +
3193 (cy_chip_offset[chip_number] << index);
3194 info->chip_rev = cyy_readb(info, CyGFRCR);
3196 if (info->chip_rev >= CD1400_REV_J) {
3197 /* It is a CD1400 rev. J or later */
3198 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3199 info->tco = baud_co_60[13]; /* Tx CO */
3200 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3201 info->rco = baud_co_60[13]; /* Rx CO */
3202 info->rtsdtr_inv = 1;
3204 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3205 info->tco = baud_co_25[13]; /* Tx CO */
3206 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3207 info->rco = baud_co_25[13]; /* Rx CO */
3208 info->rtsdtr_inv = 0;
3210 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3211 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
3216 #ifndef CONFIG_CYZ_INTR
3217 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3218 mod_timer(&cyz_timerlist, jiffies + 1);
3220 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3227 /* initialize chips on Cyclom-Y card -- return number of valid
3228 chips (which is number of ports/4) */
3229 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
3232 unsigned int chip_number;
3233 void __iomem *base_addr;
3235 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3236 /* Cy_HwReset is 0x1400 */
3237 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3238 /* Cy_ClrIntr is 0x1800 */
3241 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3244 true_base_addr + (cy_chip_offset[chip_number] << index);
3246 if (readb(base_addr + (CyCCR << index)) != 0x00) {
3248 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3249 chip_number, (unsigned long)base_addr);
3254 cy_writeb(base_addr + (CyGFRCR << index), 0);
3257 /* The Cyclom-16Y does not decode address bit 9 and therefore
3258 cannot distinguish between references to chip 0 and a non-
3259 existent chip 4. If the preceding clearing of the supposed
3260 chip 4 GFRCR register appears at chip 0, there is no chip 4
3261 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3263 if (chip_number == 4 && readb(true_base_addr +
3264 (cy_chip_offset[0] << index) +
3265 (CyGFRCR << index)) == 0) {
3269 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3272 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
3274 printk(" chip #%d at %#6lx is not responding ",
3275 chip_number, (unsigned long)base_addr);
3276 printk("(GFRCR stayed 0)\n",
3280 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
3283 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3285 chip_number, (unsigned long)base_addr,
3286 base_addr[CyGFRCR<<index]);
3290 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
3291 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
3292 /* It is a CD1400 rev. J or later */
3293 /* Impossible to reach 5ms with this chip.
3294 Changed to 2ms instead (f = 500 Hz). */
3295 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3298 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3302 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3303 chip_number, (unsigned long)base_addr,
3304 readb(base_addr+(CyGFRCR<<index)));
3308 } /* cyy_init_card */
3311 * ---------------------------------------------------------------------
3312 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3313 * sets global variables and return the number of ISA boards found.
3314 * ---------------------------------------------------------------------
3316 static int __init cy_detect_isa(void)
3319 unsigned short cy_isa_irq, nboard;
3320 void __iomem *cy_isa_address;
3321 unsigned short i, j, cy_isa_nchan;
3329 /* Check for module parameters */
3330 for (i = 0; i < NR_CARDS; i++) {
3331 if (maddr[i] || i) {
3333 cy_isa_addresses[i] = maddr[i];
3340 /* scan the address table probing for Cyclom-Y/ISA boards */
3341 for (i = 0; i < NR_ISA_ADDRS; i++) {
3342 unsigned int isa_address = cy_isa_addresses[i];
3343 if (isa_address == 0x0000)
3346 /* probe for CD1400... */
3347 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3348 if (cy_isa_address == NULL) {
3349 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3353 cy_isa_nchan = CyPORTS_PER_CHIP *
3354 cyy_init_card(cy_isa_address, 0);
3355 if (cy_isa_nchan == 0) {
3356 iounmap(cy_isa_address);
3360 if (isparam && irq[i])
3361 cy_isa_irq = irq[i];
3364 /* find out the board's irq by probing */
3365 cy_isa_irq = detect_isa_irq(cy_isa_address);
3366 if (cy_isa_irq == 0) {
3367 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3368 "IRQ could not be detected.\n",
3369 (unsigned long)cy_isa_address);
3370 iounmap(cy_isa_address);
3374 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
3375 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3376 "more channels are available. Change NR_PORTS "
3377 "in cyclades.c and recompile kernel.\n",
3378 (unsigned long)cy_isa_address);
3379 iounmap(cy_isa_address);
3382 /* fill the next cy_card structure available */
3383 for (j = 0; j < NR_CARDS; j++) {
3384 if (cy_card[j].base_addr == NULL)
3387 if (j == NR_CARDS) { /* no more cy_cards available */
3388 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3389 "more cards can be used. Change NR_CARDS in "
3390 "cyclades.c and recompile kernel.\n",
3391 (unsigned long)cy_isa_address);
3392 iounmap(cy_isa_address);
3397 if (request_irq(cy_isa_irq, cyy_interrupt,
3398 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
3399 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3400 "could not allocate IRQ#%d.\n",
3401 (unsigned long)cy_isa_address, cy_isa_irq);
3402 iounmap(cy_isa_address);
3407 cy_card[j].base_addr = cy_isa_address;
3408 cy_card[j].ctl_addr.p9050 = NULL;
3409 cy_card[j].irq = (int)cy_isa_irq;
3410 cy_card[j].bus_index = 0;
3411 cy_card[j].first_line = cy_next_channel;
3412 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3413 cy_card[j].nports = cy_isa_nchan;
3414 if (cy_init_card(&cy_card[j])) {
3415 cy_card[j].base_addr = NULL;
3416 free_irq(cy_isa_irq, &cy_card[j]);
3417 iounmap(cy_isa_address);
3422 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3423 "%d channels starting from port %d\n",
3424 j + 1, (unsigned long)cy_isa_address,
3425 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
3426 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3428 for (j = cy_next_channel;
3429 j < cy_next_channel + cy_isa_nchan; j++)
3430 tty_register_device(cy_serial_driver, j, NULL);
3431 cy_next_channel += cy_isa_nchan;
3436 #endif /* CONFIG_ISA */
3437 } /* cy_detect_isa */
3440 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
3444 for (a = 0; a < size && *str; a++, str++)
3448 for (; a < size; a++, str++)
3455 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
3458 for (; size > 0; size--) {
3459 cy_writel(fpga, *data++);
3464 static void __devinit plx_init(struct pci_dev *pdev, int irq,
3465 struct RUNTIME_9060 __iomem *addr)
3468 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
3470 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
3472 /* Reload Config. Registers from EEPROM */
3473 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
3475 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3477 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3478 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3479 * registers. This will remain here until we find a permanent fix.
3481 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3484 static int __devinit __cyz_load_fw(const struct firmware *fw,
3485 const char *name, const u32 mailbox, void __iomem *base,
3488 const void *ptr = fw->data;
3489 const struct zfile_header *h = ptr;
3490 const struct zfile_config *c, *cs;
3491 const struct zfile_block *b, *bs;
3492 unsigned int a, tmp, len = fw->size;
3493 #define BAD_FW KERN_ERR "Bad firmware: "
3494 if (len < sizeof(*h)) {
3495 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3499 cs = ptr + h->config_offset;
3500 bs = ptr + h->block_offset;
3502 if ((void *)(cs + h->n_config) > ptr + len ||
3503 (void *)(bs + h->n_blocks) > ptr + len) {
3504 printk(BAD_FW "too short");
3508 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3509 cyc_isfwstr(h->date, sizeof(h->date))) {
3510 printk(BAD_FW "bad formatted header string\n");
3514 if (strncmp(name, h->name, sizeof(h->name))) {
3515 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3520 for (c = cs; c < cs + h->n_config; c++) {
3521 for (a = 0; a < c->n_blocks; a++)
3522 if (c->block_list[a] > h->n_blocks) {
3523 printk(BAD_FW "bad block ref number in cfgs\n");
3526 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3530 printk(BAD_FW "nothing appropriate\n");
3534 for (b = bs; b < bs + h->n_blocks; b++)
3535 if (b->file_offset + b->size > len) {
3536 printk(BAD_FW "bad block data offset\n");
3540 /* everything is OK, let's seek'n'load it */
3541 for (c = cs; c < cs + h->n_config; c++)
3542 if (c->mailbox == mailbox && c->function == 0)
3545 for (a = 0; a < c->n_blocks; a++) {
3546 b = &bs[c->block_list[a]];
3547 if (b->type == ZBLOCK_FPGA) {
3549 cyz_fpga_copy(fpga, ptr + b->file_offset,
3553 memcpy_toio(base + b->ram_offset,
3554 ptr + b->file_offset, b->size);
3561 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3562 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3564 const struct firmware *fw;
3565 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3566 struct CUSTOM_REG __iomem *cust = base_addr;
3567 struct ZFW_CTRL __iomem *pt_zfwctrl;
3569 u32 mailbox, status, nchan;
3573 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3575 dev_err(&pdev->dev, "can't get firmware\n");
3579 /* Check whether the firmware is already loaded and running. If
3580 positive, skip this board */
3581 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
3582 u32 cntval = readl(base_addr + 0x190);
3585 if (cntval != readl(base_addr + 0x190)) {
3586 /* FW counter is working, FW is running */
3587 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3588 "Skipping board.\n");
3595 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3598 mailbox = readl(&ctl_addr->mail_box_0);
3600 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
3601 /* stops CPU and set window to beginning of RAM */
3602 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3603 cy_writel(&cust->cpu_stop, 0);
3604 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3608 plx_init(pdev, irq, ctl_addr);
3612 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3616 if (!__cyz_fpga_loaded(ctl_addr)) {
3617 dev_err(&pdev->dev, "fw upload successful, but fw is "
3623 /* stops CPU and set window to beginning of RAM */
3624 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3625 cy_writel(&cust->cpu_stop, 0);
3626 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3630 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3631 cy_writeb(tmp, 255);
3633 /* set window to last 512K of RAM */
3634 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
3635 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3636 cy_writeb(tmp, 255);
3637 /* set window to beginning of RAM */
3638 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3641 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3642 release_firmware(fw);
3646 /* finish boot and start boards */
3647 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3648 cy_writel(&cust->cpu_start, 0);
3649 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3651 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3653 if (status != ZFIRM_ID) {
3654 if (status == ZFIRM_HLT) {
3655 dev_err(&pdev->dev, "you need an external power supply "
3656 "for this number of ports. Firmware halted and "
3661 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3662 "some more time\n", status);
3663 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3666 if (status != ZFIRM_ID) {
3667 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3668 "Giving up. (fid->signature = 0x%x)\n",
3670 dev_info(&pdev->dev, "*** Warning ***: if you are "
3671 "upgrading the FW, please power cycle the "
3672 "system before loading the new FW to the "
3675 if (__cyz_fpga_loaded(ctl_addr))
3676 plx_init(pdev, irq, ctl_addr);
3681 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3684 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3686 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3687 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3688 base_addr + readl(&fid->zfwctrl_addr));
3690 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
3691 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3692 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
3695 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3696 "check the connection between the Z host card and the "
3697 "serial expanders.\n");
3699 if (__cyz_fpga_loaded(ctl_addr))
3700 plx_init(pdev, irq, ctl_addr);
3702 dev_info(&pdev->dev, "Null number of ports detected. Board "
3708 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3709 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3712 Early firmware failed to start looking for commands.
3713 This enables firmware interrupts for those commands.
3715 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3717 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3722 release_firmware(fw);
3727 static int __devinit cy_pci_probe(struct pci_dev *pdev,
3728 const struct pci_device_id *ent)
3730 void __iomem *addr0 = NULL, *addr2 = NULL;
3731 char *card_name = NULL;
3732 u32 uninitialized_var(mailbox);
3733 unsigned int device_id, nchan = 0, card_no, i;
3734 unsigned char plx_ver;
3737 retval = pci_enable_device(pdev);
3739 dev_err(&pdev->dev, "cannot enable device\n");
3743 /* read PCI configuration area */
3745 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
3747 #if defined(__alpha__)
3748 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3749 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3750 "addresses on Alpha systems.\n");
3755 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3756 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3762 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3763 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3765 pdev->resource[2].flags &= ~IORESOURCE_IO;
3768 retval = pci_request_regions(pdev, "cyclades");
3770 dev_err(&pdev->dev, "failed to reserve resources\n");
3775 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3776 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3777 card_name = "Cyclom-Y";
3779 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3781 if (addr0 == NULL) {
3782 dev_err(&pdev->dev, "can't remap ctl region\n");
3785 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3787 if (addr2 == NULL) {
3788 dev_err(&pdev->dev, "can't remap base region\n");
3792 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3794 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3795 "Serial-Modules\n");
3798 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3799 struct RUNTIME_9060 __iomem *ctl_addr;
3801 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3803 if (addr0 == NULL) {
3804 dev_err(&pdev->dev, "can't remap ctl region\n");
3808 /* Disable interrupts on the PLX before resetting it */
3809 cy_writew(&ctl_addr->intr_ctrl_stat,
3810 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
3812 plx_init(pdev, irq, addr0);
3814 mailbox = readl(&ctl_addr->mail_box_0);
3816 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3817 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3818 if (addr2 == NULL) {
3819 dev_err(&pdev->dev, "can't remap base region\n");
3823 if (mailbox == ZE_V1) {
3824 card_name = "Cyclades-Ze";
3826 card_name = "Cyclades-8Zo";
3828 if (mailbox == ZO_V1) {
3829 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3830 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3831 "id %lx, ver %lx\n", (ulong)(0xff &
3832 readl(&((struct CUSTOM_REG *)addr2)->
3833 fpga_id)), (ulong)(0xff &
3834 readl(&((struct CUSTOM_REG *)addr2)->
3836 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3838 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3839 "Cyclades-Z board. FPGA not loaded\n");
3842 /* The following clears the firmware id word. This
3843 ensures that the driver will not attempt to talk to
3844 the board until it has been properly initialized.
3846 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3847 cy_writel(addr2 + ID_ADDRESS, 0L);
3850 retval = cyz_load_fw(pdev, addr2, addr0, irq);
3856 if ((cy_next_channel + nchan) > NR_PORTS) {
3857 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3858 "channels are available. Change NR_PORTS in "
3859 "cyclades.c and recompile kernel.\n");
3862 /* fill the next cy_card structure available */
3863 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3864 if (cy_card[card_no].base_addr == NULL)
3867 if (card_no == NR_CARDS) { /* no more cy_cards available */
3868 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3869 "more cards can be used. Change NR_CARDS in "
3870 "cyclades.c and recompile kernel.\n");
3874 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3875 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3877 retval = request_irq(irq, cyy_interrupt,
3878 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
3880 dev_err(&pdev->dev, "could not allocate IRQ\n");
3883 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
3885 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3886 struct ZFW_CTRL __iomem *zfw_ctrl;
3888 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3890 cy_card[card_no].hw_ver = mailbox;
3891 cy_card[card_no].num_chips = (unsigned int)-1;
3892 cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
3893 #ifdef CONFIG_CYZ_INTR
3894 /* allocate IRQ only if board has an IRQ */
3895 if (irq != 0 && irq != 255) {
3896 retval = request_irq(irq, cyz_interrupt,
3897 IRQF_SHARED, "Cyclades-Z",
3900 dev_err(&pdev->dev, "could not allocate IRQ\n");
3904 #endif /* CONFIG_CYZ_INTR */
3908 cy_card[card_no].base_addr = addr2;
3909 cy_card[card_no].ctl_addr.p9050 = addr0;
3910 cy_card[card_no].irq = irq;
3911 cy_card[card_no].bus_index = 1;
3912 cy_card[card_no].first_line = cy_next_channel;
3913 cy_card[card_no].nports = nchan;
3914 retval = cy_init_card(&cy_card[card_no]);
3918 pci_set_drvdata(pdev, &cy_card[card_no]);
3920 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3921 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3922 /* enable interrupts in the PCI interface */
3923 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3926 cy_writeb(addr0 + 0x4c, 0x43);
3931 default: /* Old boards, use PLX_9060 */
3933 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3934 plx_init(pdev, irq, ctl_addr);
3935 cy_writew(&ctl_addr->intr_ctrl_stat,
3936 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3942 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3943 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3944 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
3945 tty_register_device(cy_serial_driver, i, &pdev->dev);
3946 cy_next_channel += nchan;
3950 cy_card[card_no].base_addr = NULL;
3951 free_irq(irq, &cy_card[card_no]);
3957 pci_release_regions(pdev);
3959 pci_disable_device(pdev);
3964 static void __devexit cy_pci_remove(struct pci_dev *pdev)
3966 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
3969 /* non-Z with old PLX */
3970 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
3972 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
3974 #ifndef CONFIG_CYZ_INTR
3975 if (!cy_is_Z(cinfo))
3977 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3978 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3981 iounmap(cinfo->base_addr);
3982 if (cinfo->ctl_addr.p9050)
3983 iounmap(cinfo->ctl_addr.p9050);
3985 #ifndef CONFIG_CYZ_INTR
3987 #endif /* CONFIG_CYZ_INTR */
3989 free_irq(cinfo->irq, cinfo);
3990 pci_release_regions(pdev);
3992 cinfo->base_addr = NULL;
3993 for (i = cinfo->first_line; i < cinfo->first_line +
3995 tty_unregister_device(cy_serial_driver, i);
3997 kfree(cinfo->ports);
4000 static struct pci_driver cy_pci_driver = {
4002 .id_table = cy_pci_dev_id,
4003 .probe = cy_pci_probe,
4004 .remove = __devexit_p(cy_pci_remove)
4008 static int cyclades_proc_show(struct seq_file *m, void *v)
4010 struct cyclades_port *info;
4012 __u32 cur_jifs = jiffies;
4014 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
4015 "IdleIn Overruns Ldisc\n");
4017 /* Output one line for each known port */
4018 for (i = 0; i < NR_CARDS; i++)
4019 for (j = 0; j < cy_card[i].nports; j++) {
4020 info = &cy_card[i].ports[j];
4022 if (info->port.count) {
4023 /* XXX is the ldisc num worth this? */
4024 struct tty_struct *tty;
4025 struct tty_ldisc *ld;
4027 tty = tty_port_tty_get(&info->port);
4029 ld = tty_ldisc_ref(tty);
4032 tty_ldisc_deref(ld);
4036 seq_printf(m, "%3d %8lu %10lu %8lu "
4037 "%10lu %8lu %9lu %6d\n", info->line,
4038 (cur_jifs - info->idle_stats.in_use) /
4039 HZ, info->idle_stats.xmit_bytes,
4040 (cur_jifs - info->idle_stats.xmit_idle)/
4041 HZ, info->idle_stats.recv_bytes,
4042 (cur_jifs - info->idle_stats.recv_idle)/
4043 HZ, info->idle_stats.overruns,
4046 seq_printf(m, "%3d %8lu %10lu %8lu "
4047 "%10lu %8lu %9lu %6ld\n",
4048 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
4053 static int cyclades_proc_open(struct inode *inode, struct file *file)
4055 return single_open(file, cyclades_proc_show, NULL);
4058 static const struct file_operations cyclades_proc_fops = {
4059 .owner = THIS_MODULE,
4060 .open = cyclades_proc_open,
4062 .llseek = seq_lseek,
4063 .release = single_release,
4066 /* The serial driver boot-time initialization code!
4067 Hardware I/O ports are mapped to character special devices on a
4068 first found, first allocated manner. That is, this code searches
4069 for Cyclom cards in the system. As each is found, it is probed
4070 to discover how many chips (and thus how many ports) are present.
4071 These ports are mapped to the tty ports 32 and upward in monotonic
4072 fashion. If an 8-port card is replaced with a 16-port card, the
4073 port mapping on a following card will shift.
4075 This approach is different from what is used in the other serial
4076 device driver because the Cyclom is more properly a multiplexer,
4077 not just an aggregation of serial ports on one card.
4079 If there are more cards with more ports than have been
4080 statically allocated above, a warning is printed and the
4081 extra ports are ignored.
4084 static const struct tty_operations cy_ops = {
4088 .put_char = cy_put_char,
4089 .flush_chars = cy_flush_chars,
4090 .write_room = cy_write_room,
4091 .chars_in_buffer = cy_chars_in_buffer,
4092 .flush_buffer = cy_flush_buffer,
4094 .throttle = cy_throttle,
4095 .unthrottle = cy_unthrottle,
4096 .set_termios = cy_set_termios,
4099 .hangup = cy_hangup,
4100 .break_ctl = cy_break,
4101 .wait_until_sent = cy_wait_until_sent,
4102 .tiocmget = cy_tiocmget,
4103 .tiocmset = cy_tiocmset,
4104 .proc_fops = &cyclades_proc_fops,
4107 static int __init cy_init(void)
4109 unsigned int nboards;
4110 int retval = -ENOMEM;
4112 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4113 if (!cy_serial_driver)
4116 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
4117 __DATE__, __TIME__);
4119 /* Initialize the tty_driver structure */
4121 cy_serial_driver->owner = THIS_MODULE;
4122 cy_serial_driver->driver_name = "cyclades";
4123 cy_serial_driver->name = "ttyC";
4124 cy_serial_driver->major = CYCLADES_MAJOR;
4125 cy_serial_driver->minor_start = 0;
4126 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4127 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4128 cy_serial_driver->init_termios = tty_std_termios;
4129 cy_serial_driver->init_termios.c_cflag =
4130 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4131 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4132 tty_set_operations(cy_serial_driver, &cy_ops);
4134 retval = tty_register_driver(cy_serial_driver);
4136 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4140 /* the code below is responsible to find the boards. Each different
4141 type of board has its own detection routine. If a board is found,
4142 the next cy_card structure available is set by the detection
4143 routine. These functions are responsible for checking the
4144 availability of cy_card and cy_port data structures and updating
4145 the cy_next_channel. */
4147 /* look for isa boards */
4148 nboards = cy_detect_isa();
4151 /* look for pci boards */
4152 retval = pci_register_driver(&cy_pci_driver);
4153 if (retval && !nboards) {
4154 tty_unregister_driver(cy_serial_driver);
4161 put_tty_driver(cy_serial_driver);
4166 static void __exit cy_cleanup_module(void)
4168 struct cyclades_card *card;
4171 #ifndef CONFIG_CYZ_INTR
4172 del_timer_sync(&cyz_timerlist);
4173 #endif /* CONFIG_CYZ_INTR */
4175 e1 = tty_unregister_driver(cy_serial_driver);
4177 printk(KERN_ERR "failed to unregister Cyclades serial "
4178 "driver(%d)\n", e1);
4181 pci_unregister_driver(&cy_pci_driver);
4184 for (i = 0; i < NR_CARDS; i++) {
4186 if (card->base_addr) {
4187 /* clear interrupt */
4188 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4189 iounmap(card->base_addr);
4190 if (card->ctl_addr.p9050)
4191 iounmap(card->ctl_addr.p9050);
4193 #ifndef CONFIG_CYZ_INTR
4195 #endif /* CONFIG_CYZ_INTR */
4197 free_irq(card->irq, card);
4198 for (e1 = card->first_line; e1 < card->first_line +
4200 tty_unregister_device(cy_serial_driver, e1);
4205 put_tty_driver(cy_serial_driver);
4206 } /* cy_cleanup_module */
4208 module_init(cy_init);
4209 module_exit(cy_cleanup_module);
4211 MODULE_LICENSE("GPL");
4212 MODULE_VERSION(CY_VERSION);
4213 MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);