1
2
3
4
5
6
7
8
9
10
11
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/platform_device.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
18#include <linux/slab.h>
19#include <linux/gpio.h>
20#include <linux/platform_data/atmel.h>
21
22#include <pcmcia/ss.h>
23
24#include <mach/hardware.h>
25#include <asm/io.h>
26#include <asm/sizes.h>
27
28#include <mach/at91rm9200_mc.h>
29#include <mach/at91_ramc.h>
30
31
32
33
34
35
36
37
38#define CF_ATTR_PHYS (0)
39#define CF_IO_PHYS (1 << 23)
40#define CF_MEM_PHYS (0x017ff800)
41
42
43
44static const char driver_name[] = "at91_cf";
45
46struct at91_cf_socket {
47 struct pcmcia_socket socket;
48
49 unsigned present:1;
50
51 struct platform_device *pdev;
52 struct at91_cf_data *board;
53
54 unsigned long phys_baseaddr;
55};
56
57static inline int at91_cf_present(struct at91_cf_socket *cf)
58{
59 return !gpio_get_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
69static irqreturn_t at91_cf_irq(int irq, void *_cf)
70{
71 struct at91_cf_socket *cf = _cf;
72
73 if (irq == gpio_to_irq(cf->board->det_pin)) {
74 unsigned present = at91_cf_present(cf);
75
76
77 if (present != cf->present) {
78 cf->present = present;
79 pr_debug("%s: card %s\n", driver_name,
80 present ? "present" : "gone");
81 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
97
98 if (at91_cf_present(cf)) {
99 int rdy = gpio_is_valid(cf->board->irq_pin);
100 int vcc = gpio_is_valid(cf->board->vcc_pin);
101
102 *sp = SS_DETECT | SS_3VCARD;
103 if (!rdy || gpio_get_value(rdy))
104 *sp |= SS_READY;
105 if (!vcc || gpio_get_value(vcc))
106 *sp |= SS_POWERON;
107 } else
108 *sp = 0;
109
110 return 0;
111}
112
113static int
114at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
115{
116 struct at91_cf_socket *cf;
117
118 cf = container_of(sock, struct at91_cf_socket, socket);
119
120
121 if (gpio_is_valid(cf->board->vcc_pin)) {
122 switch (s->Vcc) {
123 case 0:
124 gpio_set_value(cf->board->vcc_pin, 0);
125 break;
126 case 33:
127 gpio_set_value(cf->board->vcc_pin, 1);
128 break;
129 default:
130 return -EINVAL;
131 }
132 }
133
134
135 gpio_set_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
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
159
160 csr = at91_ramc_read(0, AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
161
162
163
164
165
166
167
168
169
170
171
172 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
173 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 }
179 at91_ramc_write(0, AT91_SMC_CSR(cf->board->chipselect), csr);
180
181 io->start = cf->socket.io_offset;
182 io->stop = io->start + SZ_2K - 1;
183
184 return 0;
185}
186
187
188static int
189at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
190{
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
198 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
199 if (map->flags & MAP_ATTRIB)
200 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
201 else
202 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
203
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
218static int __init at91_cf_probe(struct platform_device *pdev)
219{
220 struct at91_cf_socket *cf;
221 struct at91_cf_data *board = pdev->dev.platform_data;
222 struct resource *io;
223 int status;
224
225 if (!board || !gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin))
226 return -ENODEV;
227
228 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
229 if (!io)
230 return -ENODEV;
231
232 cf = kzalloc(sizeof *cf, GFP_KERNEL);
233 if (!cf)
234 return -ENOMEM;
235
236 cf->board = board;
237 cf->pdev = pdev;
238 cf->phys_baseaddr = io->start;
239 platform_set_drvdata(pdev, cf);
240
241
242 status = gpio_request(board->det_pin, "cf_det");
243 if (status < 0)
244 goto fail0;
245 status = request_irq(gpio_to_irq(board->det_pin), at91_cf_irq, 0, driver_name, cf);
246 if (status < 0)
247 goto fail00;
248 device_init_wakeup(&pdev->dev, 1);
249
250 status = gpio_request(board->rst_pin, "cf_rst");
251 if (status < 0)
252 goto fail0a;
253
254 if (gpio_is_valid(board->vcc_pin)) {
255 status = gpio_request(board->vcc_pin, "cf_vcc");
256 if (status < 0)
257 goto fail0b;
258 }
259
260
261
262
263
264
265
266 if (gpio_is_valid(board->irq_pin)) {
267 status = gpio_request(board->irq_pin, "cf_irq");
268 if (status < 0)
269 goto fail0c;
270 status = request_irq(gpio_to_irq(board->irq_pin), at91_cf_irq,
271 IRQF_SHARED, driver_name, cf);
272 if (status < 0)
273 goto fail0d;
274 cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
275 } else
276 cf->socket.pci_irq = nr_irqs + 1;
277
278
279 cf->socket.io_offset = (unsigned long)
280 ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
281 if (!cf->socket.io_offset) {
282 status = -ENXIO;
283 goto fail1;
284 }
285
286
287 if (!request_mem_region(io->start, resource_size(io), driver_name)) {
288 status = -ENXIO;
289 goto fail1;
290 }
291
292 pr_info("%s: irqs det #%d, io #%d\n", driver_name,
293 gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
294
295 cf->socket.owner = THIS_MODULE;
296 cf->socket.dev.parent = &pdev->dev;
297 cf->socket.ops = &at91_cf_ops;
298 cf->socket.resource_ops = &pccard_static_ops;
299 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
300 | SS_CAP_MEM_ALIGN;
301 cf->socket.map_size = SZ_2K;
302 cf->socket.io[0].res = io;
303
304 status = pcmcia_register_socket(&cf->socket);
305 if (status < 0)
306 goto fail2;
307
308 return 0;
309
310fail2:
311 release_mem_region(io->start, resource_size(io));
312fail1:
313 if (cf->socket.io_offset)
314 iounmap((void __iomem *) cf->socket.io_offset);
315 if (gpio_is_valid(board->irq_pin)) {
316 free_irq(gpio_to_irq(board->irq_pin), cf);
317fail0d:
318 gpio_free(board->irq_pin);
319 }
320fail0c:
321 if (gpio_is_valid(board->vcc_pin))
322 gpio_free(board->vcc_pin);
323fail0b:
324 gpio_free(board->rst_pin);
325fail0a:
326 device_init_wakeup(&pdev->dev, 0);
327 free_irq(gpio_to_irq(board->det_pin), cf);
328fail00:
329 gpio_free(board->det_pin);
330fail0:
331 kfree(cf);
332 return status;
333}
334
335static int __exit at91_cf_remove(struct platform_device *pdev)
336{
337 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
338 struct at91_cf_data *board = cf->board;
339 struct resource *io = cf->socket.io[0].res;
340
341 pcmcia_unregister_socket(&cf->socket);
342 release_mem_region(io->start, resource_size(io));
343 iounmap((void __iomem *) cf->socket.io_offset);
344 if (gpio_is_valid(board->irq_pin)) {
345 free_irq(gpio_to_irq(board->irq_pin), cf);
346 gpio_free(board->irq_pin);
347 }
348 if (gpio_is_valid(board->vcc_pin))
349 gpio_free(board->vcc_pin);
350 gpio_free(board->rst_pin);
351 device_init_wakeup(&pdev->dev, 0);
352 free_irq(gpio_to_irq(board->det_pin), cf);
353 gpio_free(board->det_pin);
354 kfree(cf);
355 return 0;
356}
357
358#ifdef CONFIG_PM
359
360static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
361{
362 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
363 struct at91_cf_data *board = cf->board;
364
365 if (device_may_wakeup(&pdev->dev)) {
366 enable_irq_wake(gpio_to_irq(board->det_pin));
367 if (gpio_is_valid(board->irq_pin))
368 enable_irq_wake(gpio_to_irq(board->irq_pin));
369 }
370 return 0;
371}
372
373static int at91_cf_resume(struct platform_device *pdev)
374{
375 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
376 struct at91_cf_data *board = cf->board;
377
378 if (device_may_wakeup(&pdev->dev)) {
379 disable_irq_wake(gpio_to_irq(board->det_pin));
380 if (gpio_is_valid(board->irq_pin))
381 disable_irq_wake(gpio_to_irq(board->irq_pin));
382 }
383
384 return 0;
385}
386
387#else
388#define at91_cf_suspend NULL
389#define at91_cf_resume NULL
390#endif
391
392static struct platform_driver at91_cf_driver = {
393 .driver = {
394 .name = (char *) driver_name,
395 .owner = THIS_MODULE,
396 },
397 .remove = __exit_p(at91_cf_remove),
398 .suspend = at91_cf_suspend,
399 .resume = at91_cf_resume,
400};
401
402
403
404static int __init at91_cf_init(void)
405{
406 return platform_driver_probe(&at91_cf_driver, at91_cf_probe);
407}
408module_init(at91_cf_init);
409
410static void __exit at91_cf_exit(void)
411{
412 platform_driver_unregister(&at91_cf_driver);
413}
414module_exit(at91_cf_exit);
415
416MODULE_DESCRIPTION("AT91 Compact Flash Driver");
417MODULE_AUTHOR("David Brownell");
418MODULE_LICENSE("GPL");
419MODULE_ALIAS("platform:at91_cf");
420