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authorDavid Vrabel <david.vrabel@csr.com>2008-11-19 09:48:07 -0500
committerDavid Vrabel <david.vrabel@csr.com>2008-11-19 09:48:07 -0500
commitdba0a918722ee0f0ba3442575e4448c3ab622be4 (patch)
treefdb466cf09e7916135098d651b18924b2fe9ba5f /drivers/pcmcia/hd64465_ss.c
parent0996e6382482ce9014787693d3884e9468153a5c (diff)
parent7f0f598a0069d1ab072375965a4b69137233169c (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-upstream
Diffstat (limited to 'drivers/pcmcia/hd64465_ss.c')
-rw-r--r--drivers/pcmcia/hd64465_ss.c939
1 files changed, 0 insertions, 939 deletions
diff --git a/drivers/pcmcia/hd64465_ss.c b/drivers/pcmcia/hd64465_ss.c
deleted file mode 100644
index 9ef69cdb3183..000000000000
--- a/drivers/pcmcia/hd64465_ss.c
+++ /dev/null
@@ -1,939 +0,0 @@
1/*
2 * Device driver for the PCMCIA controller module of the
3 * Hitachi HD64465 handheld companion chip.
4 *
5 * Note that the HD64465 provides a very thin PCMCIA host bridge
6 * layer, requiring a lot of the work of supporting cards to be
7 * performed by the processor. For example: mapping of card
8 * interrupts to processor IRQs is done by IRQ demuxing software;
9 * IO and memory mappings are fixed; setting voltages according
10 * to card Voltage Select pins etc is done in software.
11 *
12 * Note also that this driver uses only the simple, fixed,
13 * 16MB, 16-bit wide mappings to PCMCIA spaces defined by the
14 * HD64465. Larger mappings, smaller mappings, or mappings of
15 * different width to the same socket, are all possible only by
16 * involving the SH7750's MMU, which is considered unnecessary here.
17 * The downside is that it may be possible for some drivers to
18 * break because they need or expect 8-bit mappings.
19 *
20 * This driver currently supports only the following configuration:
21 * SH7750 CPU, HD64465, TPS2206 voltage control chip.
22 *
23 * by Greg Banks <gbanks@pocketpenguins.com>
24 * (c) 2000 PocketPenguins Inc
25 */
26
27#include <linux/types.h>
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/string.h>
31#include <linux/kernel.h>
32#include <linux/ioport.h>
33#include <linux/mm.h>
34#include <linux/vmalloc.h>
35#include <asm/errno.h>
36#include <linux/irq.h>
37#include <linux/interrupt.h>
38#include <linux/platform_device.h>
39
40#include <asm/io.h>
41#include <asm/hd64465/hd64465.h>
42#include <asm/hd64465/io.h>
43
44#include <pcmcia/cs_types.h>
45#include <pcmcia/cs.h>
46#include <pcmcia/cistpl.h>
47#include <pcmcia/ds.h>
48#include <pcmcia/ss.h>
49
50#define MODNAME "hd64465_ss"
51
52/* #define HD64465_DEBUG 1 */
53
54#if HD64465_DEBUG
55#define DPRINTK(args...) printk(MODNAME ": " args)
56#else
57#define DPRINTK(args...)
58#endif
59
60extern int hd64465_io_debug;
61extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
62extern void p3_iounmap(void *addr);
63
64/*============================================================*/
65
66#define HS_IO_MAP_SIZE (64*1024)
67
68typedef struct hs_socket_t
69{
70 unsigned int number;
71 u_int irq;
72 u_long mem_base;
73 void *io_base;
74 u_long mem_length;
75 u_int ctrl_base;
76 socket_state_t state;
77 pccard_io_map io_maps[MAX_IO_WIN];
78 pccard_mem_map mem_maps[MAX_WIN];
79 struct pcmcia_socket socket;
80} hs_socket_t;
81
82
83
84#define HS_MAX_SOCKETS 2
85static hs_socket_t hs_sockets[HS_MAX_SOCKETS];
86
87#define hs_in(sp, r) inb((sp)->ctrl_base + (r))
88#define hs_out(sp, v, r) outb(v, (sp)->ctrl_base + (r))
89
90
91/* translate a boolean value to a bit in a register */
92#define bool_to_regbit(sp, r, bi, bo) \
93 do { \
94 unsigned short v = hs_in(sp, r); \
95 if (bo) \
96 v |= (bi); \
97 else \
98 v &= ~(bi); \
99 hs_out(sp, v, r); \
100 } while(0)
101
102/* register offsets from HD64465_REG_PCC[01]ISR */
103#define ISR 0x0
104#define GCR 0x2
105#define CSCR 0x4
106#define CSCIER 0x6
107#define SCR 0x8
108
109
110/* Mask and values for CSCIER register */
111#define IER_MASK 0x80
112#define IER_ON 0x3f /* interrupts on */
113#define IER_OFF 0x00 /* interrupts off */
114
115/*============================================================*/
116
117#if HD64465_DEBUG > 10
118
119static void cis_hex_dump(const unsigned char *x, int len)
120{
121 int i;
122
123 for (i=0 ; i<len ; i++)
124 {
125 if (!(i & 0xf))
126 printk("\n%08x", (unsigned)(x + i));
127 printk(" %02x", *(volatile unsigned short*)x);
128 x += 2;
129 }
130 printk("\n");
131}
132
133#endif
134/*============================================================*/
135
136/*
137 * This code helps create the illusion that the IREQ line from
138 * the PC card is mapped to one of the CPU's IRQ lines by the
139 * host bridge hardware (which is how every host bridge *except*
140 * the HD64465 works). In particular, it supports enabling
141 * and disabling the IREQ line by code which knows nothing
142 * about the host bridge (e.g. device drivers, IDE code) using
143 * the request_irq(), free_irq(), probe_irq_on() and probe_irq_off()
144 * functions. Also, it supports sharing the mapped IRQ with
145 * real hardware IRQs from the -IRL0-3 lines.
146 */
147
148#define HS_NUM_MAPPED_IRQS 16 /* Limitation of the PCMCIA code */
149static struct
150{
151 /* index is mapped irq number */
152 hs_socket_t *sock;
153 hw_irq_controller *old_handler;
154} hs_mapped_irq[HS_NUM_MAPPED_IRQS];
155
156static void hs_socket_enable_ireq(hs_socket_t *sp)
157{
158 unsigned short cscier;
159
160 DPRINTK("hs_socket_enable_ireq(sock=%d)\n", sp->number);
161
162 cscier = hs_in(sp, CSCIER);
163 cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
164 cscier |= HD64465_PCCCSCIER_PIREQE_LEVEL;
165 hs_out(sp, cscier, CSCIER);
166}
167
168static void hs_socket_disable_ireq(hs_socket_t *sp)
169{
170 unsigned short cscier;
171
172 DPRINTK("hs_socket_disable_ireq(sock=%d)\n", sp->number);
173
174 cscier = hs_in(sp, CSCIER);
175 cscier &= ~HD64465_PCCCSCIER_PIREQE_MASK;
176 hs_out(sp, cscier, CSCIER);
177}
178
179static unsigned int hs_startup_irq(unsigned int irq)
180{
181 hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
182 hs_mapped_irq[irq].old_handler->startup(irq);
183 return 0;
184}
185
186static void hs_shutdown_irq(unsigned int irq)
187{
188 hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
189 hs_mapped_irq[irq].old_handler->shutdown(irq);
190}
191
192static void hs_enable_irq(unsigned int irq)
193{
194 hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
195 hs_mapped_irq[irq].old_handler->enable(irq);
196}
197
198static void hs_disable_irq(unsigned int irq)
199{
200 hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
201 hs_mapped_irq[irq].old_handler->disable(irq);
202}
203
204extern struct hw_interrupt_type no_irq_type;
205
206static void hs_mask_and_ack_irq(unsigned int irq)
207{
208 hs_socket_disable_ireq(hs_mapped_irq[irq].sock);
209 /* ack_none() spuriously complains about an unexpected IRQ */
210 if (hs_mapped_irq[irq].old_handler != &no_irq_type)
211 hs_mapped_irq[irq].old_handler->ack(irq);
212}
213
214static void hs_end_irq(unsigned int irq)
215{
216 hs_socket_enable_ireq(hs_mapped_irq[irq].sock);
217 hs_mapped_irq[irq].old_handler->end(irq);
218}
219
220
221static struct hw_interrupt_type hd64465_ss_irq_type = {
222 .typename = "PCMCIA-IRQ",
223 .startup = hs_startup_irq,
224 .shutdown = hs_shutdown_irq,
225 .enable = hs_enable_irq,
226 .disable = hs_disable_irq,
227 .ack = hs_mask_and_ack_irq,
228 .end = hs_end_irq
229};
230
231/*
232 * This function should only ever be called with interrupts disabled.
233 */
234static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
235{
236 struct irq_desc *desc;
237
238 DPRINTK("hs_map_irq(sock=%d irq=%d)\n", sp->number, irq);
239
240 if (irq >= HS_NUM_MAPPED_IRQS)
241 return;
242
243 desc = irq_to_desc(irq);
244 hs_mapped_irq[irq].sock = sp;
245 /* insert ourselves as the irq controller */
246 hs_mapped_irq[irq].old_handler = desc->chip;
247 desc->chip = &hd64465_ss_irq_type;
248}
249
250
251/*
252 * This function should only ever be called with interrupts disabled.
253 */
254static void hs_unmap_irq(hs_socket_t *sp, unsigned int irq)
255{
256 struct irq_desc *desc;
257
258 DPRINTK("hs_unmap_irq(sock=%d irq=%d)\n", sp->number, irq);
259
260 if (irq >= HS_NUM_MAPPED_IRQS)
261 return;
262
263 desc = irq_to_desc(irq);
264 /* restore the original irq controller */
265 desc->chip = hs_mapped_irq[irq].old_handler;
266}
267
268/*============================================================*/
269
270
271/*
272 * Set Vpp and Vcc (in tenths of a Volt). Does not
273 * support the hi-Z state.
274 *
275 * Note, this assumes the board uses a TPS2206 chip to control
276 * the Vcc and Vpp voltages to the hs_sockets. If your board
277 * uses the MIC2563 (also supported by the HD64465) then you
278 * will have to modify this function.
279 */
280 /* 0V 3.3V 5.5V */
281static const u_char hs_tps2206_avcc[3] = { 0x00, 0x04, 0x08 };
282static const u_char hs_tps2206_bvcc[3] = { 0x00, 0x80, 0x40 };
283
284static int hs_set_voltages(hs_socket_t *sp, int Vcc, int Vpp)
285{
286 u_int psr;
287 u_int vcci = 0;
288 u_int sock = sp->number;
289
290 DPRINTK("hs_set_voltage(%d, %d, %d)\n", sock, Vcc, Vpp);
291
292 switch (Vcc)
293 {
294 case 0: vcci = 0; break;
295 case 33: vcci = 1; break;
296 case 50: vcci = 2; break;
297 default: return 0;
298 }
299
300 /* Note: Vpp = 120 not supported -- Greg Banks */
301 if (Vpp != 0 && Vpp != Vcc)
302 return 0;
303
304 /* The PSR register holds 8 of the 9 bits which control
305 * the TPS2206 via its serial interface.
306 */
307 psr = inw(HD64465_REG_PCCPSR);
308 switch (sock)
309 {
310 case 0:
311 psr &= 0x0f;
312 psr |= hs_tps2206_avcc[vcci];
313 psr |= (Vpp == 0 ? 0x00 : 0x02);
314 break;
315 case 1:
316 psr &= 0xf0;
317 psr |= hs_tps2206_bvcc[vcci];
318 psr |= (Vpp == 0 ? 0x00 : 0x20);
319 break;
320 };
321 outw(psr, HD64465_REG_PCCPSR);
322
323 return 1;
324}
325
326
327/*============================================================*/
328
329/*
330 * Drive the RESET line to the card.
331 */
332static void hs_reset_socket(hs_socket_t *sp, int on)
333{
334 unsigned short v;
335
336 v = hs_in(sp, GCR);
337 if (on)
338 v |= HD64465_PCCGCR_PCCR;
339 else
340 v &= ~HD64465_PCCGCR_PCCR;
341 hs_out(sp, v, GCR);
342}
343
344/*============================================================*/
345
346static int hs_init(struct pcmcia_socket *s)
347{
348 hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
349
350 DPRINTK("hs_init(%d)\n", sp->number);
351
352 return 0;
353}
354
355/*============================================================*/
356
357
358static int hs_get_status(struct pcmcia_socket *s, u_int *value)
359{
360 hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
361 unsigned int isr;
362 u_int status = 0;
363
364
365 isr = hs_in(sp, ISR);
366
367 /* Card is seated and powered when *both* CD pins are low */
368 if ((isr & HD64465_PCCISR_PCD_MASK) == 0)
369 {
370 status |= SS_DETECT; /* card present */
371
372 switch (isr & HD64465_PCCISR_PBVD_MASK)
373 {
374 case HD64465_PCCISR_PBVD_BATGOOD:
375 break;
376 case HD64465_PCCISR_PBVD_BATWARN:
377 status |= SS_BATWARN;
378 break;
379 default:
380 status |= SS_BATDEAD;
381 break;
382 }
383
384 if (isr & HD64465_PCCISR_PREADY)
385 status |= SS_READY;
386
387 if (isr & HD64465_PCCISR_PMWP)
388 status |= SS_WRPROT;
389
390 /* Voltage Select pins interpreted as per Table 4-5 of the std.
391 * Assuming we have the TPS2206, the socket is a "Low Voltage
392 * key, 3.3V and 5V available, no X.XV available".
393 */
394 switch (isr & (HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1))
395 {
396 case HD64465_PCCISR_PVS1:
397 printk(KERN_NOTICE MODNAME ": cannot handle X.XV card, ignored\n");
398 status = 0;
399 break;
400 case 0:
401 case HD64465_PCCISR_PVS2:
402 /* 3.3V */
403 status |= SS_3VCARD;
404 break;
405 case HD64465_PCCISR_PVS2|HD64465_PCCISR_PVS1:
406 /* 5V */
407 break;
408 }
409
410 /* TODO: SS_POWERON */
411 /* TODO: SS_STSCHG */
412 }
413
414 DPRINTK("hs_get_status(%d) = %x\n", sock, status);
415
416 *value = status;
417 return 0;
418}
419
420/*============================================================*/
421
422static int hs_set_socket(struct pcmcia_socket *s, socket_state_t *state)
423{
424 hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
425 u_long flags;
426 u_int changed;
427 unsigned short cscier;
428
429 DPRINTK("hs_set_socket(sock=%d, flags=%x, csc_mask=%x, Vcc=%d, Vpp=%d, io_irq=%d)\n",
430 sock, state->flags, state->csc_mask, state->Vcc, state->Vpp, state->io_irq);
431
432 local_irq_save(flags); /* Don't want interrupts happening here */
433
434 if (state->Vpp != sp->state.Vpp ||
435 state->Vcc != sp->state.Vcc) {
436 if (!hs_set_voltages(sp, state->Vcc, state->Vpp)) {
437 local_irq_restore(flags);
438 return -EINVAL;
439 }
440 }
441
442/* hd64465_io_debug = 1; */
443 /*
444 * Handle changes in the Card Status Change mask,
445 * by propagating to the CSCR register
446 */
447 changed = sp->state.csc_mask ^ state->csc_mask;
448 cscier = hs_in(sp, CSCIER);
449
450 if (changed & SS_DETECT) {
451 if (state->csc_mask & SS_DETECT)
452 cscier |= HD64465_PCCCSCIER_PCDE;
453 else
454 cscier &= ~HD64465_PCCCSCIER_PCDE;
455 }
456
457 if (changed & SS_READY) {
458 if (state->csc_mask & SS_READY)
459 cscier |= HD64465_PCCCSCIER_PRE;
460 else
461 cscier &= ~HD64465_PCCCSCIER_PRE;
462 }
463
464 if (changed & SS_BATDEAD) {
465 if (state->csc_mask & SS_BATDEAD)
466 cscier |= HD64465_PCCCSCIER_PBDE;
467 else
468 cscier &= ~HD64465_PCCCSCIER_PBDE;
469 }
470
471 if (changed & SS_BATWARN) {
472 if (state->csc_mask & SS_BATWARN)
473 cscier |= HD64465_PCCCSCIER_PBWE;
474 else
475 cscier &= ~HD64465_PCCCSCIER_PBWE;
476 }
477
478 if (changed & SS_STSCHG) {
479 if (state->csc_mask & SS_STSCHG)
480 cscier |= HD64465_PCCCSCIER_PSCE;
481 else
482 cscier &= ~HD64465_PCCCSCIER_PSCE;
483 }
484
485 hs_out(sp, cscier, CSCIER);
486
487 if (sp->state.io_irq && !state->io_irq)
488 hs_unmap_irq(sp, sp->state.io_irq);
489 else if (!sp->state.io_irq && state->io_irq)
490 hs_map_irq(sp, state->io_irq);
491
492
493 /*
494 * Handle changes in the flags field,
495 * by propagating to config registers.
496 */
497 changed = sp->state.flags ^ state->flags;
498
499 if (changed & SS_IOCARD) {
500 DPRINTK("card type: %s\n",
501 (state->flags & SS_IOCARD ? "i/o" : "memory" ));
502 bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCT,
503 state->flags & SS_IOCARD);
504 }
505
506 if (changed & SS_RESET) {
507 DPRINTK("%s reset card\n",
508 (state->flags & SS_RESET ? "start" : "stop"));
509 bool_to_regbit(sp, GCR, HD64465_PCCGCR_PCCR,
510 state->flags & SS_RESET);
511 }
512
513 if (changed & SS_OUTPUT_ENA) {
514 DPRINTK("%sabling card output\n",
515 (state->flags & SS_OUTPUT_ENA ? "en" : "dis"));
516 bool_to_regbit(sp, GCR, HD64465_PCCGCR_PDRV,
517 state->flags & SS_OUTPUT_ENA);
518 }
519
520 /* TODO: SS_SPKR_ENA */
521
522/* hd64465_io_debug = 0; */
523 sp->state = *state;
524
525 local_irq_restore(flags);
526
527#if HD64465_DEBUG > 10
528 if (state->flags & SS_OUTPUT_ENA)
529 cis_hex_dump((const unsigned char*)sp->mem_base, 0x100);
530#endif
531 return 0;
532}
533
534/*============================================================*/
535
536static int hs_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
537{
538 hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
539 int map = io->map;
540 int sock = sp->number;
541 struct pccard_io_map *sio;
542 pgprot_t prot;
543
544 DPRINTK("hs_set_io_map(sock=%d, map=%d, flags=0x%x, speed=%dns, start=%#lx, stop=%#lx)\n",
545 sock, map, io->flags, io->speed, io->start, io->stop);
546 if (map >= MAX_IO_WIN)
547 return -EINVAL;
548 sio = &sp->io_maps[map];
549
550 /* check for null changes */
551 if (io->flags == sio->flags &&
552 io->start == sio->start &&
553 io->stop == sio->stop)
554 return 0;
555
556 if (io->flags & MAP_AUTOSZ)
557 prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IODYN);
558 else if (io->flags & MAP_16BIT)
559 prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO16);
560 else
561 prot = PAGE_KERNEL_PCC(sock, _PAGE_PCC_IO8);
562
563 /* TODO: handle MAP_USE_WAIT */
564 if (io->flags & MAP_USE_WAIT)
565 printk(KERN_INFO MODNAME ": MAP_USE_WAIT unimplemented\n");
566 /* TODO: handle MAP_PREFETCH */
567 if (io->flags & MAP_PREFETCH)
568 printk(KERN_INFO MODNAME ": MAP_PREFETCH unimplemented\n");
569 /* TODO: handle MAP_WRPROT */
570 if (io->flags & MAP_WRPROT)
571 printk(KERN_INFO MODNAME ": MAP_WRPROT unimplemented\n");
572 /* TODO: handle MAP_0WS */
573 if (io->flags & MAP_0WS)
574 printk(KERN_INFO MODNAME ": MAP_0WS unimplemented\n");
575
576 if (io->flags & MAP_ACTIVE) {
577 unsigned long pstart, psize, paddrbase;
578
579 paddrbase = virt_to_phys((void*)(sp->mem_base + 2 * HD64465_PCC_WINDOW));
580 pstart = io->start & PAGE_MASK;
581 psize = ((io->stop + PAGE_SIZE) & PAGE_MASK) - pstart;
582
583 /*
584 * Change PTEs in only that portion of the mapping requested
585 * by the caller. This means that most of the time, most of
586 * the PTEs in the io_vma will be unmapped and only the bottom
587 * page will be mapped. But the code allows for weird cards
588 * that might want IO ports > 4K.
589 */
590 sp->io_base = p3_ioremap(paddrbase + pstart, psize, pgprot_val(prot));
591
592 /*
593 * Change the mapping used by inb() outb() etc
594 */
595 hd64465_port_map(io->start,
596 io->stop - io->start + 1,
597 (unsigned long)sp->io_base + io->start, 0);
598 } else {
599 hd64465_port_unmap(sio->start, sio->stop - sio->start + 1);
600 p3_iounmap(sp->io_base);
601 }
602
603 *sio = *io;
604 return 0;
605}
606
607/*============================================================*/
608
609static int hs_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem)
610{
611 hs_socket_t *sp = container_of(s, struct hs_socket_t, socket);
612 struct pccard_mem_map *smem;
613 int map = mem->map;
614 unsigned long paddr;
615
616#if 0
617 DPRINTK("hs_set_mem_map(sock=%d, map=%d, flags=0x%x, card_start=0x%08x)\n",
618 sock, map, mem->flags, mem->card_start);
619#endif
620
621 if (map >= MAX_WIN)
622 return -EINVAL;
623 smem = &sp->mem_maps[map];
624
625 paddr = sp->mem_base; /* base of Attribute mapping */
626 if (!(mem->flags & MAP_ATTRIB))
627 paddr += HD64465_PCC_WINDOW; /* base of Common mapping */
628 paddr += mem->card_start;
629
630 /* Because we specified SS_CAP_STATIC_MAP, we are obliged
631 * at this time to report the system address corresponding
632 * to the card address requested. This is how Socket Services
633 * queries our fixed mapping. I wish this fact had been
634 * documented - Greg Banks.
635 */
636 mem->static_start = paddr;
637
638 *smem = *mem;
639
640 return 0;
641}
642
643/* TODO: do we need to use the MMU to access Common memory ??? */
644
645/*============================================================*/
646
647/*
648 * This function is registered with the HD64465 glue code to do a
649 * secondary demux step on the PCMCIA interrupts. It handles
650 * mapping the IREQ request from the card to a standard Linux
651 * IRQ, as requested by SocketServices.
652 */
653static int hs_irq_demux(int irq, void *dev)
654{
655 hs_socket_t *sp = dev;
656 u_int cscr;
657
658 DPRINTK("hs_irq_demux(irq=%d)\n", irq);
659
660 if (sp->state.io_irq &&
661 (cscr = hs_in(sp, CSCR)) & HD64465_PCCCSCR_PIREQ) {
662 cscr &= ~HD64465_PCCCSCR_PIREQ;
663 hs_out(sp, cscr, CSCR);
664 return sp->state.io_irq;
665 }
666
667 return irq;
668}
669
670/*============================================================*/
671
672/*
673 * Interrupt handling routine.
674 */
675
676static irqreturn_t hs_interrupt(int irq, void *dev)
677{
678 hs_socket_t *sp = dev;
679 u_int events = 0;
680 u_int cscr;
681
682 cscr = hs_in(sp, CSCR);
683
684 DPRINTK("hs_interrupt, cscr=%04x\n", cscr);
685
686 /* check for bus-related changes to be reported to Socket Services */
687 if (cscr & HD64465_PCCCSCR_PCDC) {
688 /* double-check for a 16-bit card, as we don't support CardBus */
689 if ((hs_in(sp, ISR) & HD64465_PCCISR_PCD_MASK) != 0) {
690 printk(KERN_NOTICE MODNAME
691 ": socket %d, card not a supported card type or not inserted correctly\n",
692 sp->number);
693 /* Don't do the rest unless a card is present */
694 cscr &= ~(HD64465_PCCCSCR_PCDC|
695 HD64465_PCCCSCR_PRC|
696 HD64465_PCCCSCR_PBW|
697 HD64465_PCCCSCR_PBD|
698 HD64465_PCCCSCR_PSC);
699 } else {
700 cscr &= ~HD64465_PCCCSCR_PCDC;
701 events |= SS_DETECT; /* card insertion or removal */
702 }
703 }
704 if (cscr & HD64465_PCCCSCR_PRC) {
705 cscr &= ~HD64465_PCCCSCR_PRC;
706 events |= SS_READY; /* ready signal changed */
707 }
708 if (cscr & HD64465_PCCCSCR_PBW) {
709 cscr &= ~HD64465_PCCCSCR_PSC;
710 events |= SS_BATWARN; /* battery warning */
711 }
712 if (cscr & HD64465_PCCCSCR_PBD) {
713 cscr &= ~HD64465_PCCCSCR_PSC;
714 events |= SS_BATDEAD; /* battery dead */
715 }
716 if (cscr & HD64465_PCCCSCR_PSC) {
717 cscr &= ~HD64465_PCCCSCR_PSC;
718 events |= SS_STSCHG; /* STSCHG (status changed) signal */
719 }
720
721 if (cscr & HD64465_PCCCSCR_PIREQ) {
722 cscr &= ~HD64465_PCCCSCR_PIREQ;
723
724 /* This should have been dealt with during irq demux */
725 printk(KERN_NOTICE MODNAME ": unexpected IREQ from card\n");
726 }
727
728 hs_out(sp, cscr, CSCR);
729
730 if (events)
731 pcmcia_parse_events(&sp->socket, events);
732
733 return IRQ_HANDLED;
734}
735
736/*============================================================*/
737
738static struct pccard_operations hs_operations = {
739 .init = hs_init,
740 .get_status = hs_get_status,
741 .set_socket = hs_set_socket,
742 .set_io_map = hs_set_io_map,
743 .set_mem_map = hs_set_mem_map,
744};
745
746static int hs_init_socket(hs_socket_t *sp, int irq, unsigned long mem_base,
747 unsigned int ctrl_base)
748{
749 unsigned short v;
750 int i, err;
751
752 memset(sp, 0, sizeof(*sp));
753 sp->irq = irq;
754 sp->mem_base = mem_base;
755 sp->mem_length = 4*HD64465_PCC_WINDOW; /* 16MB */
756 sp->ctrl_base = ctrl_base;
757
758 for (i=0 ; i<MAX_IO_WIN ; i++)
759 sp->io_maps[i].map = i;
760 for (i=0 ; i<MAX_WIN ; i++)
761 sp->mem_maps[i].map = i;
762
763 hd64465_register_irq_demux(sp->irq, hs_irq_demux, sp);
764
765 if ((err = request_irq(sp->irq, hs_interrupt, IRQF_DISABLED, MODNAME, sp)) < 0)
766 return err;
767 if (request_mem_region(sp->mem_base, sp->mem_length, MODNAME) == 0) {
768 sp->mem_base = 0;
769 return -ENOMEM;
770 }
771
772
773 /* According to section 3.2 of the PCMCIA standard, low-voltage
774 * capable cards must implement cold insertion, i.e. Vpp and
775 * Vcc set to 0 before card is inserted.
776 */
777 /*hs_set_voltages(sp, 0, 0);*/
778
779 /* hi-Z the outputs to the card and set 16MB map mode */
780 v = hs_in(sp, GCR);
781 v &= ~HD64465_PCCGCR_PCCT; /* memory-only card */
782 hs_out(sp, v, GCR);
783
784 v = hs_in(sp, GCR);
785 v |= HD64465_PCCGCR_PDRV; /* enable outputs to card */
786 hs_out(sp, v, GCR);
787
788 v = hs_in(sp, GCR);
789 v |= HD64465_PCCGCR_PMMOD; /* 16MB mapping mode */
790 hs_out(sp, v, GCR);
791
792 v = hs_in(sp, GCR);
793 /* lowest 16MB of Common */
794 v &= ~(HD64465_PCCGCR_PPA25|HD64465_PCCGCR_PPA24);
795 hs_out(sp, v, GCR);
796
797 hs_reset_socket(sp, 1);
798
799 printk(KERN_INFO "HD64465 PCMCIA bridge socket %d at 0x%08lx irq %d\n",
800 i, sp->mem_base, sp->irq);
801
802 return 0;
803}
804
805static void hs_exit_socket(hs_socket_t *sp)
806{
807 unsigned short cscier, gcr;
808 unsigned long flags;
809
810 local_irq_save(flags);
811
812 /* turn off interrupts in hardware */
813 cscier = hs_in(sp, CSCIER);
814 cscier = (cscier & IER_MASK) | IER_OFF;
815 hs_out(sp, cscier, CSCIER);
816
817 /* hi-Z the outputs to the card */
818 gcr = hs_in(sp, GCR);
819 gcr &= HD64465_PCCGCR_PDRV;
820 hs_out(sp, gcr, GCR);
821
822 /* power the card down */
823 hs_set_voltages(sp, 0, 0);
824
825 if (sp->mem_base != 0)
826 release_mem_region(sp->mem_base, sp->mem_length);
827 if (sp->irq != 0) {
828 free_irq(sp->irq, hs_interrupt);
829 hd64465_unregister_irq_demux(sp->irq);
830 }
831
832 local_irq_restore(flags);
833}
834
835static struct device_driver hd64465_driver = {
836 .name = "hd64465-pcmcia",
837 .bus = &platform_bus_type,
838 .suspend = pcmcia_socket_dev_suspend,
839 .resume = pcmcia_socket_dev_resume,
840};
841
842static struct platform_device hd64465_device = {
843 .name = "hd64465-pcmcia",
844 .id = 0,
845};
846
847static int __init init_hs(void)
848{
849 int i;
850 unsigned short v;
851
852/* hd64465_io_debug = 1; */
853 if (driver_register(&hd64465_driver))
854 return -EINVAL;
855
856 /* Wake both sockets out of STANDBY mode */
857 /* TODO: wait 15ms */
858 v = inw(HD64465_REG_SMSCR);
859 v &= ~(HD64465_SMSCR_PC0ST|HD64465_SMSCR_PC1ST);
860 outw(v, HD64465_REG_SMSCR);
861
862 /* keep power controller out of shutdown mode */
863 v = inb(HD64465_REG_PCC0SCR);
864 v |= HD64465_PCCSCR_SHDN;
865 outb(v, HD64465_REG_PCC0SCR);
866
867 /* use serial (TPS2206) power controller */
868 v = inb(HD64465_REG_PCC0CSCR);
869 v |= HD64465_PCCCSCR_PSWSEL;
870 outb(v, HD64465_REG_PCC0CSCR);
871
872 /*
873 * Setup hs_sockets[] structures and request system resources.
874 * TODO: on memory allocation failure, power down the socket
875 * before quitting.
876 */
877 for (i=0; i<HS_MAX_SOCKETS; i++) {
878 hs_set_voltages(&hs_sockets[i], 0, 0);
879
880 hs_sockets[i].socket.features |= SS_CAP_PCCARD | SS_CAP_STATIC_MAP; /* mappings are fixed in host memory */
881 hs_sockets[i].socket.resource_ops = &pccard_static_ops;
882 hs_sockets[i].socket.irq_mask = 0xffde;/*0xffff*/ /* IRQs mapped in s/w so can do any, really */
883 hs_sockets[i].socket.map_size = HD64465_PCC_WINDOW; /* 16MB fixed window size */
884
885 hs_sockets[i].socket.owner = THIS_MODULE;
886 hs_sockets[i].socket.ss_entry = &hs_operations;
887 }
888
889 i = hs_init_socket(&hs_sockets[0],
890 HD64465_IRQ_PCMCIA0,
891 HD64465_PCC0_BASE,
892 HD64465_REG_PCC0ISR);
893 if (i < 0) {
894 unregister_driver(&hd64465_driver);
895 return i;
896 }
897 i = hs_init_socket(&hs_sockets[1],
898 HD64465_IRQ_PCMCIA1,
899 HD64465_PCC1_BASE,
900 HD64465_REG_PCC1ISR);
901 if (i < 0) {
902 unregister_driver(&hd64465_driver);
903 return i;
904 }
905
906/* hd64465_io_debug = 0; */
907
908 platform_device_register(&hd64465_device);
909
910 for (i=0; i<HS_MAX_SOCKETS; i++) {
911 unsigned int ret;
912 hs_sockets[i].socket.dev.parent = &hd64465_device.dev;
913 hs_sockets[i].number = i;
914 ret = pcmcia_register_socket(&hs_sockets[i].socket);
915 if (ret && i)
916 pcmcia_unregister_socket(&hs_sockets[0].socket);
917 }
918
919 return 0;
920}
921
922static void __exit exit_hs(void)
923{
924 int i;
925
926 for (i=0 ; i<HS_MAX_SOCKETS ; i++) {
927 pcmcia_unregister_socket(&hs_sockets[i].socket);
928 hs_exit_socket(&hs_sockets[i]);
929 }
930
931 platform_device_unregister(&hd64465_device);
932 unregister_driver(&hd64465_driver);
933}
934
935module_init(init_hs);
936module_exit(exit_hs);
937
938/*============================================================*/
939/*END*/
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 11:15:05 -0500