blob: 4902206f53d942ec6174243991c842ea580feb34 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020019
20#include <pcmcia/ss.h>
21
Russell Kinga09e64f2008-08-05 16:14:15 +010022#include <mach/hardware.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020023#include <asm/io.h>
24#include <asm/sizes.h>
David Brownell4c1fc442008-02-04 22:27:42 -080025#include <asm/gpio.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020026
Russell Kinga09e64f2008-08-05 16:14:15 +010027#include <mach/board.h>
28#include <mach/at91rm9200_mc.h>
Andrew Victor2c1f3b72006-02-21 12:56:52 +020029
30
Andrew Victor2c1f3b72006-02-21 12:56:52 +020031/*
32 * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
33 * some other bit in {A24,A22..A11} is nREG to flag memory access
34 * (vs attributes). So more than 2KB/region would just be waste.
Andrew Victorebe5cfb2006-11-06 15:56:07 +020035 * Note: These are offsets from the physical base address.
Andrew Victor2c1f3b72006-02-21 12:56:52 +020036 */
Andrew Victorebe5cfb2006-11-06 15:56:07 +020037#define CF_ATTR_PHYS (0)
38#define CF_IO_PHYS (1 << 23)
39#define CF_MEM_PHYS (0x017ff800)
Andrew Victor2c1f3b72006-02-21 12:56:52 +020040
41/*--------------------------------------------------------------------------*/
42
43static const char driver_name[] = "at91_cf";
44
45struct at91_cf_socket {
46 struct pcmcia_socket socket;
47
48 unsigned present:1;
49
50 struct platform_device *pdev;
51 struct at91_cf_data *board;
Andrew Victorebe5cfb2006-11-06 15:56:07 +020052
53 unsigned long phys_baseaddr;
Andrew Victor2c1f3b72006-02-21 12:56:52 +020054};
55
Andrew Victor2c1f3b72006-02-21 12:56:52 +020056static inline int at91_cf_present(struct at91_cf_socket *cf)
57{
David Brownell4c1fc442008-02-04 22:27:42 -080058 return !gpio_get_value(cf->board->det_pin);
Andrew Victor2c1f3b72006-02-21 12:56:52 +020059}
60
61/*--------------------------------------------------------------------------*/
62
63static int at91_cf_ss_init(struct pcmcia_socket *s)
64{
65 return 0;
66}
67
David Howells7d12e782006-10-05 14:55:46 +010068static irqreturn_t at91_cf_irq(int irq, void *_cf)
Andrew Victor2c1f3b72006-02-21 12:56:52 +020069{
Jeff Garzikc7bec5a2006-10-06 15:00:58 -040070 struct at91_cf_socket *cf = _cf;
Andrew Victor2c1f3b72006-02-21 12:56:52 +020071
72 if (irq == cf->board->det_pin) {
73 unsigned present = at91_cf_present(cf);
74
75 /* kick pccard as needed */
76 if (present != cf->present) {
77 cf->present = present;
David Brownell2c536202006-04-14 18:05:38 -070078 pr_debug("%s: card %s\n", driver_name,
79 present ? "present" : "gone");
Andrew Victor2c1f3b72006-02-21 12:56:52 +020080 pcmcia_parse_events(&cf->socket, SS_DETECT);
81 }
82 }
83
84 return IRQ_HANDLED;
85}
86
87static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
88{
89 struct at91_cf_socket *cf;
90
91 if (!sp)
92 return -EINVAL;
93
94 cf = container_of(s, struct at91_cf_socket, socket);
95
David Brownell2c536202006-04-14 18:05:38 -070096 /* NOTE: CF is always 3VCARD */
Andrew Victor2c1f3b72006-02-21 12:56:52 +020097 if (at91_cf_present(cf)) {
98 int rdy = cf->board->irq_pin; /* RDY/nIRQ */
99 int vcc = cf->board->vcc_pin;
100
101 *sp = SS_DETECT | SS_3VCARD;
David Brownell4c1fc442008-02-04 22:27:42 -0800102 if (!rdy || gpio_get_value(rdy))
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200103 *sp |= SS_READY;
David Brownell4c1fc442008-02-04 22:27:42 -0800104 if (!vcc || gpio_get_value(vcc))
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200105 *sp |= SS_POWERON;
106 } else
107 *sp = 0;
108
109 return 0;
110}
111
David Brownell2c536202006-04-14 18:05:38 -0700112static int
113at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200114{
115 struct at91_cf_socket *cf;
116
117 cf = container_of(sock, struct at91_cf_socket, socket);
118
119 /* switch Vcc if needed and possible */
120 if (cf->board->vcc_pin) {
121 switch (s->Vcc) {
122 case 0:
David Brownell4c1fc442008-02-04 22:27:42 -0800123 gpio_set_value(cf->board->vcc_pin, 0);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200124 break;
125 case 33:
David Brownell4c1fc442008-02-04 22:27:42 -0800126 gpio_set_value(cf->board->vcc_pin, 1);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200127 break;
128 default:
129 return -EINVAL;
130 }
131 }
132
133 /* toggle reset if needed */
David Brownell4c1fc442008-02-04 22:27:42 -0800134 gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200135
136 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
137 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
138
139 return 0;
140}
141
142static int at91_cf_ss_suspend(struct pcmcia_socket *s)
143{
144 return at91_cf_set_socket(s, &dead_socket);
145}
146
147/* we already mapped the I/O region */
148static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
149{
150 struct at91_cf_socket *cf;
151 u32 csr;
152
153 cf = container_of(s, struct at91_cf_socket, socket);
154 io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
155
156 /*
157 * Use 16 bit accesses unless/until we need 8-bit i/o space.
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200158 */
Andrew Victor40a00172006-12-04 12:26:36 +0200159 csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200160
161 /*
162 * NOTE: this CF controller ignores IOIS16, so we can't really do
163 * MAP_AUTOSZ. The 16bit mode allows single byte access on either
164 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
165 * purposes (and handles ide-cs).
166 *
167 * The 8bit mode is needed for odd byte access on D0-D7. It seems
168 * some cards only like that way to get at the odd byte, despite
169 * CF 3.0 spec table 35 also giving the D8-D15 option.
170 */
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200171 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200172 csr |= AT91_SMC_DBW_8;
173 pr_debug("%s: 8bit i/o bus\n", driver_name);
174 } else {
175 csr |= AT91_SMC_DBW_16;
176 pr_debug("%s: 16bit i/o bus\n", driver_name);
177 }
Andrew Victor40a00172006-12-04 12:26:36 +0200178 at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200179
180 io->start = cf->socket.io_offset;
181 io->stop = io->start + SZ_2K - 1;
182
183 return 0;
184}
185
186/* pcmcia layer maps/unmaps mem regions */
David Brownell2c536202006-04-14 18:05:38 -0700187static int
188at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200189{
190 struct at91_cf_socket *cf;
191
192 if (map->card_start)
193 return -EINVAL;
194
195 cf = container_of(s, struct at91_cf_socket, socket);
196
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200197 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200198 if (map->flags & MAP_ATTRIB)
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200199 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200200 else
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200201 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200202
203 return 0;
204}
205
206static struct pccard_operations at91_cf_ops = {
207 .init = at91_cf_ss_init,
208 .suspend = at91_cf_ss_suspend,
209 .get_status = at91_cf_get_status,
210 .set_socket = at91_cf_set_socket,
211 .set_io_map = at91_cf_set_io_map,
212 .set_mem_map = at91_cf_set_mem_map,
213};
214
215/*--------------------------------------------------------------------------*/
216
David Brownell0db60952006-04-19 06:37:48 -0700217static int __init at91_cf_probe(struct platform_device *pdev)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200218{
219 struct at91_cf_socket *cf;
David Brownell0db60952006-04-19 06:37:48 -0700220 struct at91_cf_data *board = pdev->dev.platform_data;
David Brownell2c536202006-04-14 18:05:38 -0700221 struct resource *io;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200222 int status;
223
224 if (!board || !board->det_pin || !board->rst_pin)
225 return -ENODEV;
226
David Brownell2c536202006-04-14 18:05:38 -0700227 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
228 if (!io)
229 return -ENODEV;
230
Robert P. J. Daycd861282006-12-13 00:34:52 -0800231 cf = kzalloc(sizeof *cf, GFP_KERNEL);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200232 if (!cf)
233 return -ENOMEM;
234
235 cf->board = board;
236 cf->pdev = pdev;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200237 cf->phys_baseaddr = io->start;
David Brownell0db60952006-04-19 06:37:48 -0700238 platform_set_drvdata(pdev, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200239
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200240 /* must be a GPIO; ergo must trigger on both edges */
David Brownell4c1fc442008-02-04 22:27:42 -0800241 status = gpio_request(board->det_pin, "cf_det");
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200242 if (status < 0)
243 goto fail0;
David Brownell4c1fc442008-02-04 22:27:42 -0800244 status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
245 if (status < 0)
246 goto fail00;
David Brownell0db60952006-04-19 06:37:48 -0700247 device_init_wakeup(&pdev->dev, 1);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200248
David Brownell4c1fc442008-02-04 22:27:42 -0800249 status = gpio_request(board->rst_pin, "cf_rst");
250 if (status < 0)
251 goto fail0a;
252
253 if (board->vcc_pin) {
254 status = gpio_request(board->vcc_pin, "cf_vcc");
255 if (status < 0)
256 goto fail0b;
257 }
258
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200259 /*
260 * The card driver will request this irq later as needed.
261 * but it causes lots of "irqNN: nobody cared" messages
262 * unless we report that we handle everything (sigh).
263 * (Note: DK board doesn't wire the IRQ pin...)
264 */
265 if (board->irq_pin) {
David Brownell4c1fc442008-02-04 22:27:42 -0800266 status = gpio_request(board->irq_pin, "cf_irq");
267 if (status < 0)
268 goto fail0c;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200269 status = request_irq(board->irq_pin, at91_cf_irq,
Thomas Gleixnerdace1452006-07-01 19:29:38 -0700270 IRQF_SHARED, driver_name, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200271 if (status < 0)
David Brownell4c1fc442008-02-04 22:27:42 -0800272 goto fail0d;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200273 cf->socket.pci_irq = board->irq_pin;
David Brownell2c536202006-04-14 18:05:38 -0700274 } else
Yinghai Lu9130add2008-08-19 20:49:52 -0700275 cf->socket.pci_irq = nr_irqs + 1;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200276
277 /* pcmcia layer only remaps "real" memory not iospace */
David Brownell4c1fc442008-02-04 22:27:42 -0800278 cf->socket.io_offset = (unsigned long)
279 ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200280 if (!cf->socket.io_offset) {
281 status = -ENXIO;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200282 goto fail1;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200283 }
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200284
Andrew Victor40a00172006-12-04 12:26:36 +0200285 /* reserve chip-select regions */
Joe Perches28f65c112011-06-09 09:13:32 -0700286 if (!request_mem_region(io->start, resource_size(io), driver_name)) {
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200287 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:
Joe Perches28f65c112011-06-09 09:13:32 -0700310 release_mem_region(io->start, resource_size(io));
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);
Joe Perches28f65c112011-06-09 09:13:32 -0700341 release_mem_region(io->start, resource_size(io));
David Brownell4c1fc442008-02-04 22:27:42 -0800342 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");