blob: 99baabc23599129179fc814a519ba35b089135be [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
21#include <asm/hardware.h>
22#include <asm/io.h>
23#include <asm/sizes.h>
24
Andrew Victor2c1f3b72006-02-21 12:56:52 +020025#include <asm/arch/board.h>
26#include <asm/arch/gpio.h>
Andrew Victor55d8bae2006-11-30 17:16:43 +010027#include <asm/arch/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
55#define SZ_2K (2 * SZ_1K)
56
57static inline int at91_cf_present(struct at91_cf_socket *cf)
58{
59 return !at91_get_gpio_value(cf->board->det_pin);
60}
61
62/*--------------------------------------------------------------------------*/
63
64static int at91_cf_ss_init(struct pcmcia_socket *s)
65{
66 return 0;
67}
68
David Howells7d12e782006-10-05 14:55:46 +010069static irqreturn_t at91_cf_irq(int irq, void *_cf)
Andrew Victor2c1f3b72006-02-21 12:56:52 +020070{
Jeff Garzikc7bec5a2006-10-06 15:00:58 -040071 struct at91_cf_socket *cf = _cf;
Andrew Victor2c1f3b72006-02-21 12:56:52 +020072
73 if (irq == cf->board->det_pin) {
74 unsigned present = at91_cf_present(cf);
75
76 /* kick pccard as needed */
77 if (present != cf->present) {
78 cf->present = present;
David Brownell2c536202006-04-14 18:05:38 -070079 pr_debug("%s: card %s\n", driver_name,
80 present ? "present" : "gone");
Andrew Victor2c1f3b72006-02-21 12:56:52 +020081 pcmcia_parse_events(&cf->socket, SS_DETECT);
82 }
83 }
84
85 return IRQ_HANDLED;
86}
87
88static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
89{
90 struct at91_cf_socket *cf;
91
92 if (!sp)
93 return -EINVAL;
94
95 cf = container_of(s, struct at91_cf_socket, socket);
96
David Brownell2c536202006-04-14 18:05:38 -070097 /* NOTE: CF is always 3VCARD */
Andrew Victor2c1f3b72006-02-21 12:56:52 +020098 if (at91_cf_present(cf)) {
99 int rdy = cf->board->irq_pin; /* RDY/nIRQ */
100 int vcc = cf->board->vcc_pin;
101
102 *sp = SS_DETECT | SS_3VCARD;
103 if (!rdy || at91_get_gpio_value(rdy))
104 *sp |= SS_READY;
105 if (!vcc || at91_get_gpio_value(vcc))
106 *sp |= SS_POWERON;
107 } else
108 *sp = 0;
109
110 return 0;
111}
112
David Brownell2c536202006-04-14 18:05:38 -0700113static int
114at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200115{
116 struct at91_cf_socket *cf;
117
118 cf = container_of(sock, struct at91_cf_socket, socket);
119
120 /* switch Vcc if needed and possible */
121 if (cf->board->vcc_pin) {
122 switch (s->Vcc) {
123 case 0:
124 at91_set_gpio_value(cf->board->vcc_pin, 0);
125 break;
126 case 33:
127 at91_set_gpio_value(cf->board->vcc_pin, 1);
128 break;
129 default:
130 return -EINVAL;
131 }
132 }
133
134 /* toggle reset if needed */
135 at91_set_gpio_value(cf->board->rst_pin, s->flags & SS_RESET);
136
137 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
138 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
139
140 return 0;
141}
142
143static int at91_cf_ss_suspend(struct pcmcia_socket *s)
144{
145 return at91_cf_set_socket(s, &dead_socket);
146}
147
148/* we already mapped the I/O region */
149static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
150{
151 struct at91_cf_socket *cf;
152 u32 csr;
153
154 cf = container_of(s, struct at91_cf_socket, socket);
155 io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
156
157 /*
158 * Use 16 bit accesses unless/until we need 8-bit i/o space.
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200159 */
Andrew Victor40a00172006-12-04 12:26:36 +0200160 csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200161
162 /*
163 * NOTE: this CF controller ignores IOIS16, so we can't really do
164 * MAP_AUTOSZ. The 16bit mode allows single byte access on either
165 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
166 * purposes (and handles ide-cs).
167 *
168 * The 8bit mode is needed for odd byte access on D0-D7. It seems
169 * some cards only like that way to get at the odd byte, despite
170 * CF 3.0 spec table 35 also giving the D8-D15 option.
171 */
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200172 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200173 csr |= AT91_SMC_DBW_8;
174 pr_debug("%s: 8bit i/o bus\n", driver_name);
175 } else {
176 csr |= AT91_SMC_DBW_16;
177 pr_debug("%s: 16bit i/o bus\n", driver_name);
178 }
Andrew Victor40a00172006-12-04 12:26:36 +0200179 at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200180
181 io->start = cf->socket.io_offset;
182 io->stop = io->start + SZ_2K - 1;
183
184 return 0;
185}
186
187/* pcmcia layer maps/unmaps mem regions */
David Brownell2c536202006-04-14 18:05:38 -0700188static int
189at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200190{
191 struct at91_cf_socket *cf;
192
193 if (map->card_start)
194 return -EINVAL;
195
196 cf = container_of(s, struct at91_cf_socket, socket);
197
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200198 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200199 if (map->flags & MAP_ATTRIB)
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200200 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200201 else
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200202 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200203
204 return 0;
205}
206
207static struct pccard_operations at91_cf_ops = {
208 .init = at91_cf_ss_init,
209 .suspend = at91_cf_ss_suspend,
210 .get_status = at91_cf_get_status,
211 .set_socket = at91_cf_set_socket,
212 .set_io_map = at91_cf_set_io_map,
213 .set_mem_map = at91_cf_set_mem_map,
214};
215
216/*--------------------------------------------------------------------------*/
217
David Brownell0db60952006-04-19 06:37:48 -0700218static int __init at91_cf_probe(struct platform_device *pdev)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200219{
220 struct at91_cf_socket *cf;
David Brownell0db60952006-04-19 06:37:48 -0700221 struct at91_cf_data *board = pdev->dev.platform_data;
David Brownell2c536202006-04-14 18:05:38 -0700222 struct resource *io;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200223 int status;
224
225 if (!board || !board->det_pin || !board->rst_pin)
226 return -ENODEV;
227
David Brownell2c536202006-04-14 18:05:38 -0700228 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
229 if (!io)
230 return -ENODEV;
231
Robert P. J. Daycd861282006-12-13 00:34:52 -0800232 cf = kzalloc(sizeof *cf, GFP_KERNEL);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200233 if (!cf)
234 return -ENOMEM;
235
236 cf->board = board;
237 cf->pdev = pdev;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200238 cf->phys_baseaddr = io->start;
David Brownell0db60952006-04-19 06:37:48 -0700239 platform_set_drvdata(pdev, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200240
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200241 /* must be a GPIO; ergo must trigger on both edges */
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200242 status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200243 if (status < 0)
244 goto fail0;
David Brownell0db60952006-04-19 06:37:48 -0700245 device_init_wakeup(&pdev->dev, 1);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200246
247 /*
248 * The card driver will request this irq later as needed.
249 * but it causes lots of "irqNN: nobody cared" messages
250 * unless we report that we handle everything (sigh).
251 * (Note: DK board doesn't wire the IRQ pin...)
252 */
253 if (board->irq_pin) {
254 status = request_irq(board->irq_pin, at91_cf_irq,
Thomas Gleixnerdace1452006-07-01 19:29:38 -0700255 IRQF_SHARED, driver_name, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200256 if (status < 0)
257 goto fail0a;
258 cf->socket.pci_irq = board->irq_pin;
David Brownell2c536202006-04-14 18:05:38 -0700259 } else
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200260 cf->socket.pci_irq = NR_IRQS + 1;
261
262 /* pcmcia layer only remaps "real" memory not iospace */
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200263 cf->socket.io_offset = (unsigned long) ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
264 if (!cf->socket.io_offset) {
265 status = -ENXIO;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200266 goto fail1;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200267 }
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200268
Andrew Victor40a00172006-12-04 12:26:36 +0200269 /* reserve chip-select regions */
David Brownell2c536202006-04-14 18:05:38 -0700270 if (!request_mem_region(io->start, io->end + 1 - io->start,
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200271 driver_name)) {
272 status = -ENXIO;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200273 goto fail1;
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200274 }
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200275
276 pr_info("%s: irqs det #%d, io #%d\n", driver_name,
277 board->det_pin, board->irq_pin);
278
279 cf->socket.owner = THIS_MODULE;
Alexey Dobriyane4a3c3f2007-02-13 22:39:27 -0800280 cf->socket.dev.parent = &pdev->dev;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200281 cf->socket.ops = &at91_cf_ops;
282 cf->socket.resource_ops = &pccard_static_ops;
283 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
284 | SS_CAP_MEM_ALIGN;
285 cf->socket.map_size = SZ_2K;
David Brownell2c536202006-04-14 18:05:38 -0700286 cf->socket.io[0].res = io;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200287
288 status = pcmcia_register_socket(&cf->socket);
289 if (status < 0)
290 goto fail2;
291
292 return 0;
293
294fail2:
David Brownell2c536202006-04-14 18:05:38 -0700295 release_mem_region(io->start, io->end + 1 - io->start);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200296fail1:
Amol Lad3efa9972006-10-20 14:44:18 -0700297 if (cf->socket.io_offset)
298 iounmap((void __iomem *) cf->socket.io_offset);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200299 if (board->irq_pin)
300 free_irq(board->irq_pin, cf);
301fail0a:
David Brownell1fbece12006-07-01 13:39:55 -0700302 device_init_wakeup(&pdev->dev, 0);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200303 free_irq(board->det_pin, cf);
304fail0:
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200305 kfree(cf);
306 return status;
307}
308
David Brownell0db60952006-04-19 06:37:48 -0700309static int __exit at91_cf_remove(struct platform_device *pdev)
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200310{
David Brownell0db60952006-04-19 06:37:48 -0700311 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
312 struct at91_cf_data *board = cf->board;
David Brownell2c536202006-04-14 18:05:38 -0700313 struct resource *io = cf->socket.io[0].res;
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200314
315 pcmcia_unregister_socket(&cf->socket);
David Brownell0db60952006-04-19 06:37:48 -0700316 if (board->irq_pin)
317 free_irq(board->irq_pin, cf);
David Brownell0db60952006-04-19 06:37:48 -0700318 device_init_wakeup(&pdev->dev, 0);
Andrew Victorebe5cfb2006-11-06 15:56:07 +0200319 free_irq(board->det_pin, cf);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200320 iounmap((void __iomem *) cf->socket.io_offset);
David Brownell2c536202006-04-14 18:05:38 -0700321 release_mem_region(io->start, io->end + 1 - io->start);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200322
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200323 kfree(cf);
324 return 0;
325}
326
David Brownell0db60952006-04-19 06:37:48 -0700327#ifdef CONFIG_PM
328
329static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
330{
331 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
332 struct at91_cf_data *board = cf->board;
333
334 pcmcia_socket_dev_suspend(&pdev->dev, mesg);
David Brownell1fbece12006-07-01 13:39:55 -0700335 if (device_may_wakeup(&pdev->dev)) {
David Brownell0db60952006-04-19 06:37:48 -0700336 enable_irq_wake(board->det_pin);
David Brownell1fbece12006-07-01 13:39:55 -0700337 if (board->irq_pin)
338 enable_irq_wake(board->irq_pin);
339 } else {
David Brownell0db60952006-04-19 06:37:48 -0700340 disable_irq_wake(board->det_pin);
David Brownell1fbece12006-07-01 13:39:55 -0700341 if (board->irq_pin)
342 disable_irq_wake(board->irq_pin);
David Brownell0db60952006-04-19 06:37:48 -0700343 }
David Brownell0db60952006-04-19 06:37:48 -0700344 return 0;
345}
346
347static int at91_cf_resume(struct platform_device *pdev)
348{
David Brownell0db60952006-04-19 06:37:48 -0700349 pcmcia_socket_dev_resume(&pdev->dev);
350 return 0;
351}
352
353#else
354#define at91_cf_suspend NULL
355#define at91_cf_resume NULL
356#endif
357
358static struct platform_driver at91_cf_driver = {
359 .driver = {
360 .name = (char *) driver_name,
361 .owner = THIS_MODULE,
362 },
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200363 .probe = at91_cf_probe,
364 .remove = __exit_p(at91_cf_remove),
David Brownell0db60952006-04-19 06:37:48 -0700365 .suspend = at91_cf_suspend,
366 .resume = at91_cf_resume,
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200367};
368
369/*--------------------------------------------------------------------------*/
370
371static int __init at91_cf_init(void)
372{
David Brownell0db60952006-04-19 06:37:48 -0700373 return platform_driver_register(&at91_cf_driver);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200374}
375module_init(at91_cf_init);
376
377static void __exit at91_cf_exit(void)
378{
David Brownell0db60952006-04-19 06:37:48 -0700379 platform_driver_unregister(&at91_cf_driver);
Andrew Victor2c1f3b72006-02-21 12:56:52 +0200380}
381module_exit(at91_cf_exit);
382
383MODULE_DESCRIPTION("AT91 Compact Flash Driver");
384MODULE_AUTHOR("David Brownell");
385MODULE_LICENSE("GPL");