blob: fb904f444d900563601fd073199b6bb1a4cf65c8 [file] [log] [blame]
Andrew Victor2c1f3b72006-02-21 12:56:52 +02001/*
2 * at91_cf.c -- AT91 CompactFlash controller driver
3 *
4 * Copyright (C) 2005 David Brownell
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/kernel.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020014#include <linux/platform_device.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
18
19#include <pcmcia/ss.h>
20
Russell Kinga09e64f2008-08-05 16:14:15 +010021#include <mach/hardware.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020022#include <asm/io.h>
23#include <asm/sizes.h>
David Brownell4c1fc442008-02-04 22:27:42 -080024#include <asm/gpio.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020025
Russell Kinga09e64f2008-08-05 16:14:15 +010026#include <mach/board.h>
27#include <mach/at91rm9200_mc.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020028
29
Andrew Victor2c1f3b72006-02-21 12:56:52 +020030/*
31 * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
32 * some other bit in {A24,A22..A11} is nREG to flag memory access
33 * (vs attributes). So more than 2KB/region would just be waste.
Andrew Victorebe5cfb2006-11-06 15:56:07 +020034 * Note: These are offsets from the physical base address.
Andrew Victor2c1f3b72006-02-21 12:56:52 +020035 */
Andrew Victorebe5cfb2006-11-06 15:56:07 +020036#define CF_ATTR_PHYS (0)
37#define CF_IO_PHYS (1 << 23)
38#define CF_MEM_PHYS (0x017ff800)
Andrew Victor2c1f3b72006-02-21 12:56:52 +020039
40/*--------------------------------------------------------------------------*/
41
42static const char driver_name[] = "at91_cf";
43
44struct at91_cf_socket {
45 struct pcmcia_socket socket;
46
47 unsigned present:1;
48
49 struct platform_device *pdev;
50 struct at91_cf_data *board;
Andrew Victorebe5cfb2006-11-06 15:56:07 +020051
52 unsigned long phys_baseaddr;
Andrew Victor2c1f3b72006-02-21 12:56:52 +020053};
54
Andrew Victor2c1f3b72006-02-21 12:56:52 +020055static inline int at91_cf_present(struct at91_cf_socket *cf)
56{
David Brownell4c1fc442008-02-04 22:27:42 -080057 return !gpio_get_value(cf->board->det_pin);
Andrew Victor2c1f3b72006-02-21 12:56:52 +020058}
59
60/*--------------------------------------------------------------------------*/
61
62static int at91_cf_ss_init(struct pcmcia_socket *s)
63{
64 return 0;
65}
66
David Howells7d12e782006-10-05 14:55:46 +010067static irqreturn_t at91_cf_irq(int irq, void *_cf)
Andrew Victor2c1f3b72006-02-21 12:56:52 +020068{
Jeff Garzikc7bec5a2006-10-06 15:00:58 -040069 struct at91_cf_socket *cf = _cf;
Andrew Victor2c1f3b72006-02-21 12:56:52 +020070
71 if (irq == cf->board->det_pin) {
72 unsigned present = at91_cf_present(cf);
73
74 /* kick pccard as needed */
75 if (present != cf->present) {
76 cf->present = present;
David Brownell2c536202006-04-14 18:05:38 -070077 pr_debug("%s: card %s\n", driver_name,
78 present ? "present" : "gone");
Andrew Victor2c1f3b72006-02-21 12:56:52 +020079 pcmcia_parse_events(&cf->socket, SS_DETECT);
80 }
81 }
82
83 return IRQ_HANDLED;
84}
85
86static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
87{
88 struct at91_cf_socket *cf;
89
90 if (!sp)
91 return -EINVAL;
92
93 cf = container_of(s, struct at91_cf_socket, socket);
94
David Brownell2c536202006-04-14 18:05:38 -070095 /* NOTE: CF is always 3VCARD */
Andrew Victor2c1f3b72006-02-21 12:56:52 +020096 if (at91_cf_present(cf)) {
97 int rdy = cf->board->irq_pin; /* RDY/nIRQ */
98 int vcc = cf->board->vcc_pin;
99
100 *sp = SS_DETECT | SS_3VCARD;
David Brownell4c1fc442008-02-04 22:27:42 -0800101 if (!rdy || gpio_get_value(rdy))
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200102 *sp |= SS_READY;
David Brownell4c1fc442008-02-04 22:27:42 -0800103 if (!vcc || gpio_get_value(vcc))
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200104 *sp |= SS_POWERON;
105 } else
106 *sp = 0;
107
108 return 0;
109}
110
David Brownell2c536202006-04-14 18:05:38 -0700111static int
112at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200113{
114 struct at91_cf_socket *cf;
115
116 cf = container_of(sock, struct at91_cf_socket, socket);
117
118 /* switch Vcc if needed and possible */
119 if (cf->board->vcc_pin) {
120 switch (s->Vcc) {
121 case 0:
David Brownell4c1fc442008-02-04 22:27:42 -0800122 gpio_set_value(cf->board->vcc_pin, 0);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200123 break;
124 case 33:
David Brownell4c1fc442008-02-04 22:27:42 -0800125 gpio_set_value(cf->board->vcc_pin, 1);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200126 break;
127 default:
128 return -EINVAL;
129 }
130 }
131
132 /* toggle reset if needed */
David Brownell4c1fc442008-02-04 22:27:42 -0800133 gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200134
135 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
136 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
137
138 return 0;
139}
140
141static int at91_cf_ss_suspend(struct pcmcia_socket *s)
142{
143 return at91_cf_set_socket(s, &dead_socket);
144}
145
146/* we already mapped the I/O region */
147static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
148{
149 struct at91_cf_socket *cf;
150 u32 csr;
151
152 cf = container_of(s, struct at91_cf_socket, socket);
153 io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
154
155 /*
156 * Use 16 bit accesses unless/until we need 8-bit i/o space.
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200157 */
Andrew Victor40a00172006-12-04 12:26:36 +0200158 csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200159
160 /*
161 * NOTE: this CF controller ignores IOIS16, so we can't really do
162 * MAP_AUTOSZ. The 16bit mode allows single byte access on either
163 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
164 * purposes (and handles ide-cs).
165 *
166 * The 8bit mode is needed for odd byte access on D0-D7. It seems
167 * some cards only like that way to get at the odd byte, despite
168 * CF 3.0 spec table 35 also giving the D8-D15 option.
169 */
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200170 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200171 csr |= AT91_SMC_DBW_8;
172 pr_debug("%s: 8bit i/o bus\n", driver_name);
173 } else {
174 csr |= AT91_SMC_DBW_16;
175 pr_debug("%s: 16bit i/o bus\n", driver_name);
176 }
Andrew Victor40a00172006-12-04 12:26:36 +0200177 at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200178
179 io->start = cf->socket.io_offset;
180 io->stop = io->start + SZ_2K - 1;
181
182 return 0;
183}
184
185/* pcmcia layer maps/unmaps mem regions */
David Brownell2c536202006-04-14 18:05:38 -0700186static int
187at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200188{
189 struct at91_cf_socket *cf;
190
191 if (map->card_start)
192 return -EINVAL;
193
194 cf = container_of(s, struct at91_cf_socket, socket);
195
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200196 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200197 if (map->flags & MAP_ATTRIB)
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200198 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200199 else
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200200 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200201
202 return 0;
203}
204
205static struct pccard_operations at91_cf_ops = {
206 .init = at91_cf_ss_init,
207 .suspend = at91_cf_ss_suspend,
208 .get_status = at91_cf_get_status,
209 .set_socket = at91_cf_set_socket,
210 .set_io_map = at91_cf_set_io_map,
211 .set_mem_map = at91_cf_set_mem_map,
212};
213
214/*--------------------------------------------------------------------------*/
215
David Brownell0db60952006-04-19 06:37:48 -0700216static int __init at91_cf_probe(struct platform_device *pdev)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200217{
218 struct at91_cf_socket *cf;
David Brownell0db60952006-04-19 06:37:48 -0700219 struct at91_cf_data *board = pdev->dev.platform_data;
David Brownell2c536202006-04-14 18:05:38 -0700220 struct resource *io;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200221 int status;
222
223 if (!board || !board->det_pin || !board->rst_pin)
224 return -ENODEV;
225
David Brownell2c536202006-04-14 18:05:38 -0700226 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
227 if (!io)
228 return -ENODEV;
229
Robert P. J. Daycd861282006-12-13 00:34:52 -0800230 cf = kzalloc(sizeof *cf, GFP_KERNEL);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200231 if (!cf)
232 return -ENOMEM;
233
234 cf->board = board;
235 cf->pdev = pdev;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200236 cf->phys_baseaddr = io->start;
David Brownell0db60952006-04-19 06:37:48 -0700237 platform_set_drvdata(pdev, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200238
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200239 /* must be a GPIO; ergo must trigger on both edges */
David Brownell4c1fc442008-02-04 22:27:42 -0800240 status = gpio_request(board->det_pin, "cf_det");
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200241 if (status < 0)
242 goto fail0;
David Brownell4c1fc442008-02-04 22:27:42 -0800243 status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
244 if (status < 0)
245 goto fail00;
David Brownell0db60952006-04-19 06:37:48 -0700246 device_init_wakeup(&pdev->dev, 1);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200247
David Brownell4c1fc442008-02-04 22:27:42 -0800248 status = gpio_request(board->rst_pin, "cf_rst");
249 if (status < 0)
250 goto fail0a;
251
252 if (board->vcc_pin) {
253 status = gpio_request(board->vcc_pin, "cf_vcc");
254 if (status < 0)
255 goto fail0b;
256 }
257
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200258 /*
259 * The card driver will request this irq later as needed.
260 * but it causes lots of "irqNN: nobody cared" messages
261 * unless we report that we handle everything (sigh).
262 * (Note: DK board doesn't wire the IRQ pin...)
263 */
264 if (board->irq_pin) {
David Brownell4c1fc442008-02-04 22:27:42 -0800265 status = gpio_request(board->irq_pin, "cf_irq");
266 if (status < 0)
267 goto fail0c;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200268 status = request_irq(board->irq_pin, at91_cf_irq,
Thomas Gleixnerdace1452006-07-01 19:29:38 -0700269 IRQF_SHARED, driver_name, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200270 if (status < 0)
David Brownell4c1fc442008-02-04 22:27:42 -0800271 goto fail0d;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200272 cf->socket.pci_irq = board->irq_pin;
David Brownell2c536202006-04-14 18:05:38 -0700273 } else
Yinghai Lu9130add2008-08-19 20:49:52 -0700274 cf->socket.pci_irq = nr_irqs + 1;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200275
276 /* pcmcia layer only remaps "real" memory not iospace */
David Brownell4c1fc442008-02-04 22:27:42 -0800277 cf->socket.io_offset = (unsigned long)
278 ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200279 if (!cf->socket.io_offset) {
280 status = -ENXIO;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200281 goto fail1;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200282 }
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200283
Andrew Victor40a00172006-12-04 12:26:36 +0200284 /* reserve chip-select regions */
David Brownell2c536202006-04-14 18:05:38 -0700285 if (!request_mem_region(io->start, io->end + 1 - io->start,
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200286 driver_name)) {
287 status = -ENXIO;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200288 goto fail1;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200289 }
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200290
291 pr_info("%s: irqs det #%d, io #%d\n", driver_name,
292 board->det_pin, board->irq_pin);
293
294 cf->socket.owner = THIS_MODULE;
Alexey Dobriyane4a3c3f2007-02-13 22:39:27 -0800295 cf->socket.dev.parent = &pdev->dev;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200296 cf->socket.ops = &at91_cf_ops;
297 cf->socket.resource_ops = &pccard_static_ops;
298 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
299 | SS_CAP_MEM_ALIGN;
300 cf->socket.map_size = SZ_2K;
David Brownell2c536202006-04-14 18:05:38 -0700301 cf->socket.io[0].res = io;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200302
303 status = pcmcia_register_socket(&cf->socket);
304 if (status < 0)
305 goto fail2;
306
307 return 0;
308
309fail2:
David Brownell2c536202006-04-14 18:05:38 -0700310 release_mem_region(io->start, io->end + 1 - io->start);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200311fail1:
Amol Lad3efa9972006-10-20 14:44:18 -0700312 if (cf->socket.io_offset)
313 iounmap((void __iomem *) cf->socket.io_offset);
David Brownell4c1fc442008-02-04 22:27:42 -0800314 if (board->irq_pin) {
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200315 free_irq(board->irq_pin, cf);
David Brownell4c1fc442008-02-04 22:27:42 -0800316fail0d:
317 gpio_free(board->irq_pin);
318 }
319fail0c:
320 if (board->vcc_pin)
321 gpio_free(board->vcc_pin);
322fail0b:
323 gpio_free(board->rst_pin);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200324fail0a:
David Brownell1fbece12006-07-01 13:39:55 -0700325 device_init_wakeup(&pdev->dev, 0);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200326 free_irq(board->det_pin, cf);
David Brownell4c1fc442008-02-04 22:27:42 -0800327fail00:
328 gpio_free(board->det_pin);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200329fail0:
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200330 kfree(cf);
331 return status;
332}
333
David Brownell0db60952006-04-19 06:37:48 -0700334static int __exit at91_cf_remove(struct platform_device *pdev)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200335{
David Brownell0db60952006-04-19 06:37:48 -0700336 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
337 struct at91_cf_data *board = cf->board;
David Brownell2c536202006-04-14 18:05:38 -0700338 struct resource *io = cf->socket.io[0].res;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200339
340 pcmcia_unregister_socket(&cf->socket);
David Brownell4c1fc442008-02-04 22:27:42 -0800341 release_mem_region(io->start, io->end + 1 - io->start);
342 iounmap((void __iomem *) cf->socket.io_offset);
343 if (board->irq_pin) {
David Brownell0db60952006-04-19 06:37:48 -0700344 free_irq(board->irq_pin, cf);
David Brownell4c1fc442008-02-04 22:27:42 -0800345 gpio_free(board->irq_pin);
346 }
347 if (board->vcc_pin)
348 gpio_free(board->vcc_pin);
349 gpio_free(board->rst_pin);
David Brownell0db60952006-04-19 06:37:48 -0700350 device_init_wakeup(&pdev->dev, 0);
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200351 free_irq(board->det_pin, cf);
David Brownell4c1fc442008-02-04 22:27:42 -0800352 gpio_free(board->det_pin);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200353 kfree(cf);
354 return 0;
355}
356
David Brownell0db60952006-04-19 06:37:48 -0700357#ifdef CONFIG_PM
358
359static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
360{
361 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
362 struct at91_cf_data *board = cf->board;
363
David Brownell1fbece12006-07-01 13:39:55 -0700364 if (device_may_wakeup(&pdev->dev)) {
David Brownell0db60952006-04-19 06:37:48 -0700365 enable_irq_wake(board->det_pin);
David Brownell1fbece12006-07-01 13:39:55 -0700366 if (board->irq_pin)
367 enable_irq_wake(board->irq_pin);
David Brownell0db60952006-04-19 06:37:48 -0700368 }
David Brownell0db60952006-04-19 06:37:48 -0700369 return 0;
370}
371
372static int at91_cf_resume(struct platform_device *pdev)
373{
Marc Pignat9af20372007-05-31 00:40:44 -0700374 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
375 struct at91_cf_data *board = cf->board;
376
377 if (device_may_wakeup(&pdev->dev)) {
378 disable_irq_wake(board->det_pin);
379 if (board->irq_pin)
380 disable_irq_wake(board->irq_pin);
381 }
382
David Brownell0db60952006-04-19 06:37:48 -0700383 return 0;
384}
385
386#else
387#define at91_cf_suspend NULL
388#define at91_cf_resume NULL
389#endif
390
391static struct platform_driver at91_cf_driver = {
392 .driver = {
393 .name = (char *) driver_name,
394 .owner = THIS_MODULE,
395 },
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200396 .remove = __exit_p(at91_cf_remove),
David Brownell0db60952006-04-19 06:37:48 -0700397 .suspend = at91_cf_suspend,
398 .resume = at91_cf_resume,
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200399};
400
401/*--------------------------------------------------------------------------*/
402
403static int __init at91_cf_init(void)
404{
David Brownell02c83592007-05-06 14:48:42 -0700405 return platform_driver_probe(&at91_cf_driver, at91_cf_probe);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200406}
407module_init(at91_cf_init);
408
409static void __exit at91_cf_exit(void)
410{
David Brownell0db60952006-04-19 06:37:48 -0700411 platform_driver_unregister(&at91_cf_driver);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200412}
413module_exit(at91_cf_exit);
414
415MODULE_DESCRIPTION("AT91 Compact Flash Driver");
416MODULE_AUTHOR("David Brownell");
417MODULE_LICENSE("GPL");
Kay Sievers12c2c012008-04-15 14:34:34 -0700418MODULE_ALIAS("platform:at91_cf");