2 * drivers/pcmcia/m32r_pcc.c
4 * Device driver for the PCMCIA functionality of M32R.
6 * Copyright (c) 2001, 2002, 2003, 2004
7 * Hiroyuki Kondo, Naoto Sugai, Hayato Fujiwara
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/init.h>
13 #include <linux/types.h>
14 #include <linux/fcntl.h>
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/timer.h>
19 #include <linux/ioport.h>
20 #include <linux/delay.h>
21 #include <linux/workqueue.h>
22 #include <linux/interrupt.h>
23 #include <linux/platform_device.h>
24 #include <linux/bitops.h>
27 #include <asm/addrspace.h>
29 #include <pcmcia/ss.h>
31 /* XXX: should be moved into asm/irq.h */
37 #define CHAOS_PCC_DEBUG
38 #ifdef CHAOS_PCC_DEBUG
39 static volatile u_short dummy_readbuf;
42 #define PCC_DEBUG_DBEX
45 /* Poll status interval -- 0 means default to interrupt */
46 static int poll_interval = 0;
48 typedef enum pcc_space { as_none = 0, as_comm, as_attr, as_io } pcc_as_t;
50 typedef struct pcc_socket {
52 struct pcmcia_socket socket;
56 u_long base; /* PCC register base */
58 pccard_io_map io_map[MAX_IO_WIN];
59 pccard_mem_map mem_map[MAX_WIN];
62 pcc_as_t current_space;
64 #ifdef CHAOS_PCC_DEBUG
68 struct proc_dir_entry *proc;
72 static int pcc_sockets = 0;
73 static pcc_socket_t socket[M32R_MAX_PCC] = {
77 /*====================================================================*/
79 static unsigned int pcc_get(u_short, unsigned int);
80 static void pcc_set(u_short, unsigned int , unsigned int );
82 static DEFINE_SPINLOCK(pcc_lock);
84 void pcc_iorw(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int wr, int flag)
92 pcc_socket_t *t = &socket[sock];
93 #ifdef CHAOS_PCC_DEBUG
98 spin_lock_irqsave(&pcc_lock, flags);
103 need_ex = (size > 1 && flag == 0) ? PCMOD_DBEX : 0;
104 #ifdef PCC_DEBUG_DBEX
110 * calculate access address
112 addr = t->mapaddr + port - t->ioaddr + KSEG1; /* XXX */
115 * Check current mapping
117 if (t->current_space != as_io || t->last_iodbex != need_ex) {
124 pcc_set(sock, PCCR, 0);
127 * Set mode and io address
129 cbsz = (t->flags & MAP_16BIT) ? 0 : PCMOD_CBSZ;
130 pcc_set(sock, PCMOD, PCMOD_AS_IO | cbsz | need_ex);
131 pcc_set(sock, PCADR, addr & 0x1ff00000);
136 pcc_set(sock, PCCR, 1);
138 #ifdef CHAOS_PCC_DEBUG
140 map_changed = (t->current_space == as_attr && size == 2); /* XXX */
145 t->current_space = as_io;
153 unsigned char *bp = (unsigned char *)buf;
157 dummy_readbuf = readb(addr);
173 unsigned short *bp = (unsigned short *)buf;
175 #ifdef CHAOS_PCC_DEBUG
177 dummy_readbuf = readw(addr);
183 #ifdef PCC_DEBUG_DBEX
185 unsigned char *cp = (unsigned char *)bp;
187 tmp = cp[1] << 8 | cp[0];
197 #ifdef PCC_DEBUG_DBEX
199 unsigned char *cp = (unsigned char *)bp;
203 cp[1] = (tmp >> 8) & 0xff;
213 /* addr is no longer used */
214 if ((addr = pcc_get(sock, PCIRC)) & PCIRC_BWERR) {
215 printk("m32r_pcc: BWERR detected : port 0x%04lx : iosize %dbit\n",
217 pcc_set(sock, PCIRC, addr);
223 t->last_iosize = size;
224 t->last_iodbex = need_ex;
228 spin_unlock_irqrestore(&pcc_lock,flags);
233 void pcc_ioread(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) {
234 pcc_iorw(sock, port, buf, size, nmemb, 0, flag);
237 void pcc_iowrite(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) {
238 pcc_iorw(sock, port, buf, size, nmemb, 1, flag);
241 /*====================================================================*/
243 #define IS_REGISTERED 0x2000
244 #define IS_ALIVE 0x8000
246 typedef struct pcc_t {
251 static pcc_t pcc[] = {
252 { "xnux2", 0 }, { "xnux2", 0 },
255 static irqreturn_t pcc_interrupt(int, void *);
257 /*====================================================================*/
259 static struct timer_list poll_timer;
261 static unsigned int pcc_get(u_short sock, unsigned int reg)
263 return inl(socket[sock].base + reg);
267 static void pcc_set(u_short sock, unsigned int reg, unsigned int data)
269 outl(data, socket[sock].base + reg);
272 /*======================================================================
274 See if a card is present, powered up, in IO mode, and already
275 bound to a (non PC Card) Linux driver. We leave these alone.
277 We make an exception for cards that seem to be serial devices.
279 ======================================================================*/
281 static int __init is_alive(u_short sock)
286 stat = pcc_get(sock, PCIRC);
287 f = (stat & (PCIRC_CDIN1 | PCIRC_CDIN2)) >> 16;
289 printk("m32r_pcc: No Card is detected at socket %d : stat = 0x%08x\n",stat,sock);
293 printk("m32r_pcc: Insertion fail (%.8x) at socket %d\n",stat,sock);
295 printk("m32r_pcc: Card is Inserted at socket %d(%.8x)\n",sock,stat);
299 static void add_pcc_socket(ulong base, int irq, ulong mapaddr,
302 pcc_socket_t *t = &socket[pcc_sockets];
306 t->mapaddr = mapaddr;
308 #ifdef CHAOS_PCC_DEBUG
309 t->flags = MAP_16BIT;
313 if (is_alive(pcc_sockets))
314 t->flags |= IS_ALIVE;
318 request_region(t->base, 0x20, "m32r-pcc");
321 printk(KERN_INFO " %s ", pcc[pcc_sockets].name);
322 printk("pcc at 0x%08lx\n", t->base);
324 /* Update socket interrupt information, capabilities */
325 t->socket.features |= (SS_CAP_PCCARD | SS_CAP_STATIC_MAP);
326 t->socket.map_size = M32R_PCC_MAPSIZE;
327 t->socket.io_offset = ioaddr; /* use for io access offset */
328 t->socket.irq_mask = 0;
329 t->socket.pci_irq = 2 + pcc_sockets; /* XXX */
331 request_irq(irq, pcc_interrupt, 0, "m32r-pcc", pcc_interrupt);
339 /*====================================================================*/
341 static irqreturn_t pcc_interrupt(int irq, void *dev)
344 u_int events, active;
347 pr_debug("m32r_pcc: pcc_interrupt(%d)\n", irq);
349 for (j = 0; j < 20; j++) {
351 for (i = 0; i < pcc_sockets; i++) {
352 if ((socket[i].cs_irq != irq) &&
353 (socket[i].socket.pci_irq != irq))
356 irc = pcc_get(i, PCIRC);
358 pr_debug("m32r_pcc: interrupt: socket %d pcirc 0x%02x ",
363 events = (irc) ? SS_DETECT : 0;
364 events |= (pcc_get(i,PCCR) & PCCR_PCEN) ? SS_READY : 0;
365 pr_debug("m32r_pcc: event 0x%02x\n", events);
368 pcmcia_parse_events(&socket[i].socket, events);
376 printk(KERN_NOTICE "m32r-pcc: infinite loop in interrupt handler\n");
378 pr_debug("m32r_pcc: interrupt done\n");
380 return IRQ_RETVAL(handled);
381 } /* pcc_interrupt */
383 static void pcc_interrupt_wrapper(u_long data)
385 pcc_interrupt(0, NULL);
386 init_timer(&poll_timer);
387 poll_timer.expires = jiffies + poll_interval;
388 add_timer(&poll_timer);
391 /*====================================================================*/
393 static int _pcc_get_status(u_short sock, u_int *value)
397 status = pcc_get(sock,PCIRC);
398 *value = ((status & PCIRC_CDIN1) && (status & PCIRC_CDIN2))
401 status = pcc_get(sock,PCCR);
404 *value |= (status & PCCR_PCEN) ? SS_READY : 0;
406 *value |= SS_READY; /* XXX: always */
409 status = pcc_get(sock,PCCSIGCR);
410 *value |= (status & PCCSIGCR_VEN) ? SS_POWERON : 0;
412 pr_debug("m32r_pcc: GetStatus(%d) = %#4.4x\n", sock, *value);
416 /*====================================================================*/
418 static int _pcc_set_socket(u_short sock, socket_state_t *state)
422 pr_debug("m32r_pcc: SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
423 "io_irq %d, csc_mask %#2.2x)", sock, state->flags,
424 state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
430 if (state->Vcc == 50) {
437 if (state->flags & SS_RESET) {
438 pr_debug("m32r_pcc: :RESET\n");
439 reg |= PCCSIGCR_CRST;
441 if (state->flags & SS_OUTPUT_ENA){
442 pr_debug("m32r_pcc: :OUTPUT_ENA\n");
448 pcc_set(sock,PCCSIGCR,reg);
450 if(state->flags & SS_IOCARD){
451 pr_debug("m32r_pcc: :IOCARD");
453 if (state->flags & SS_PWR_AUTO) {
454 pr_debug("m32r_pcc: :PWR_AUTO");
456 if (state->csc_mask & SS_DETECT)
457 pr_debug("m32r_pcc: :csc-SS_DETECT");
458 if (state->flags & SS_IOCARD) {
459 if (state->csc_mask & SS_STSCHG)
460 pr_debug("m32r_pcc: :STSCHG");
462 if (state->csc_mask & SS_BATDEAD)
463 pr_debug("m32r_pcc: :BATDEAD");
464 if (state->csc_mask & SS_BATWARN)
465 pr_debug("m32r_pcc: :BATWARN");
466 if (state->csc_mask & SS_READY)
467 pr_debug("m32r_pcc: :READY");
469 pr_debug("m32r_pcc: \n");
473 /*====================================================================*/
475 static int _pcc_set_io_map(u_short sock, struct pccard_io_map *io)
479 pr_debug("m32r_pcc: SetIOMap(%d, %d, %#2.2x, %d ns, "
480 "%#llx-%#llx)\n", sock, io->map, io->flags,
481 io->speed, (unsigned long long)io->start,
482 (unsigned long long)io->stop);
488 /*====================================================================*/
490 static int _pcc_set_mem_map(u_short sock, struct pccard_mem_map *mem)
493 u_char map = mem->map;
496 pcc_socket_t *t = &socket[sock];
497 #ifdef CHAOS_PCC_DEBUG
499 pcc_as_t last = t->current_space;
503 pr_debug("m32r_pcc: SetMemMap(%d, %d, %#2.2x, %d ns, "
504 "%#llx, %#x)\n", sock, map, mem->flags,
505 mem->speed, (unsigned long long)mem->static_start,
511 if ((map > MAX_WIN) || (mem->card_start > 0x3ffffff)){
518 if ((mem->flags & MAP_ACTIVE) == 0) {
519 t->current_space = as_none;
526 pcc_set(sock, PCCR, 0);
531 if (mem->flags & MAP_ATTRIB) {
532 mode = PCMOD_AS_ATTRIB | PCMOD_CBSZ;
533 t->current_space = as_attr;
535 mode = 0; /* common memory */
536 t->current_space = as_comm;
538 pcc_set(sock, PCMOD, mode);
543 addr = t->mapaddr + (mem->card_start & M32R_PCC_MAPMASK);
544 pcc_set(sock, PCADR, addr);
546 mem->static_start = addr + mem->card_start;
551 pcc_set(sock, PCCR, 1);
553 #ifdef CHAOS_PCC_DEBUG
555 if (last != as_attr) {
559 dummy_readbuf = *(u_char *)(addr + KSEG1);
567 #if 0 /* driver model ordering issue */
568 /*======================================================================
570 Routines for accessing socket information and register dumps via
573 ======================================================================*/
575 static ssize_t show_info(struct class_device *class_dev, char *buf)
577 pcc_socket_t *s = container_of(class_dev, struct pcc_socket,
580 return sprintf(buf, "type: %s\nbase addr: 0x%08lx\n",
581 pcc[s->type].name, s->base);
584 static ssize_t show_exca(struct class_device *class_dev, char *buf)
591 static CLASS_DEVICE_ATTR(info, S_IRUGO, show_info, NULL);
592 static CLASS_DEVICE_ATTR(exca, S_IRUGO, show_exca, NULL);
595 /*====================================================================*/
597 /* this is horribly ugly... proper locking needs to be done here at
599 #define LOCKED(x) do { \
601 unsigned long flags; \
602 spin_lock_irqsave(&pcc_lock, flags); \
604 spin_unlock_irqrestore(&pcc_lock, flags); \
609 static int pcc_get_status(struct pcmcia_socket *s, u_int *value)
611 unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
613 if (socket[sock].flags & IS_ALIVE) {
617 LOCKED(_pcc_get_status(sock, value));
620 static int pcc_set_socket(struct pcmcia_socket *s, socket_state_t *state)
622 unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
624 if (socket[sock].flags & IS_ALIVE)
627 LOCKED(_pcc_set_socket(sock, state));
630 static int pcc_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
632 unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
634 if (socket[sock].flags & IS_ALIVE)
636 LOCKED(_pcc_set_io_map(sock, io));
639 static int pcc_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
641 unsigned int sock = container_of(s, struct pcc_socket, socket)->number;
643 if (socket[sock].flags & IS_ALIVE)
645 LOCKED(_pcc_set_mem_map(sock, mem));
648 static int pcc_init(struct pcmcia_socket *s)
650 pr_debug("m32r_pcc: init call\n");
654 static struct pccard_operations pcc_operations = {
656 .get_status = pcc_get_status,
657 .set_socket = pcc_set_socket,
658 .set_io_map = pcc_set_io_map,
659 .set_mem_map = pcc_set_mem_map,
662 /*====================================================================*/
664 static struct platform_driver pcc_driver = {
670 static struct platform_device pcc_device = {
675 /*====================================================================*/
677 static int __init init_m32r_pcc(void)
681 ret = platform_driver_register(&pcc_driver);
685 ret = platform_device_register(&pcc_device);
687 platform_driver_unregister(&pcc_driver);
691 printk(KERN_INFO "m32r PCC probe:\n");
695 add_pcc_socket(M32R_PCC0_BASE, PCC0_IRQ, M32R_PCC0_MAPBASE, 0x1000);
697 #ifdef CONFIG_M32RPCC_SLOT2
698 add_pcc_socket(M32R_PCC1_BASE, PCC1_IRQ, M32R_PCC1_MAPBASE, 0x2000);
701 if (pcc_sockets == 0) {
702 printk("socket is not found.\n");
703 platform_device_unregister(&pcc_device);
704 platform_driver_unregister(&pcc_driver);
708 /* Set up interrupt handler(s) */
710 for (i = 0 ; i < pcc_sockets ; i++) {
711 socket[i].socket.dev.parent = &pcc_device.dev;
712 socket[i].socket.ops = &pcc_operations;
713 socket[i].socket.resource_ops = &pccard_static_ops;
714 socket[i].socket.owner = THIS_MODULE;
715 socket[i].number = i;
716 ret = pcmcia_register_socket(&socket[i].socket);
718 socket[i].flags |= IS_REGISTERED;
720 #if 0 /* driver model ordering issue */
721 class_device_create_file(&socket[i].socket.dev,
722 &class_device_attr_info);
723 class_device_create_file(&socket[i].socket.dev,
724 &class_device_attr_exca);
728 /* Finally, schedule a polling interrupt */
729 if (poll_interval != 0) {
730 poll_timer.function = pcc_interrupt_wrapper;
732 init_timer(&poll_timer);
733 poll_timer.expires = jiffies + poll_interval;
734 add_timer(&poll_timer);
738 } /* init_m32r_pcc */
740 static void __exit exit_m32r_pcc(void)
744 for (i = 0; i < pcc_sockets; i++)
745 if (socket[i].flags & IS_REGISTERED)
746 pcmcia_unregister_socket(&socket[i].socket);
748 platform_device_unregister(&pcc_device);
749 if (poll_interval != 0)
750 del_timer_sync(&poll_timer);
752 platform_driver_unregister(&pcc_driver);
753 } /* exit_m32r_pcc */
755 module_init(init_m32r_pcc);
756 module_exit(exit_m32r_pcc);
757 MODULE_LICENSE("Dual MPL/GPL");
758 /*====================================================================*/