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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
19#include <pcmcia/ss.h>
20
21#include <mach/hardware.h>
22#include <asm/io.h>
23#include <asm/sizes.h>
24#include <asm/gpio.h>
25
26#include <mach/board.h>
27#include <mach/at91rm9200_mc.h>
28
29
30
31
32
33
34
35
36#define CF_ATTR_PHYS (0)
37#define CF_IO_PHYS (1 << 23)
38#define CF_MEM_PHYS (0x017ff800)
39
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;
51
52 unsigned long phys_baseaddr;
53};
54
55#define SZ_2K (2 * SZ_1K)
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 == 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 = cf->board->irq_pin;
100 int vcc = 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 (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_sys_read(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_sys_write(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 || !board->det_pin || !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(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 (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 (board->irq_pin) {
267 status = gpio_request(board->irq_pin, "cf_irq");
268 if (status < 0)
269 goto fail0c;
270 status = request_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 = 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, io->end + 1 - io->start,
288 driver_name)) {
289 status = -ENXIO;
290 goto fail1;
291 }
292
293 pr_info("%s: irqs det #%d, io #%d\n", driver_name,
294 board->det_pin, board->irq_pin);
295
296 cf->socket.owner = THIS_MODULE;
297 cf->socket.dev.parent = &pdev->dev;
298 cf->socket.ops = &at91_cf_ops;
299 cf->socket.resource_ops = &pccard_static_ops;
300 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
301 | SS_CAP_MEM_ALIGN;
302 cf->socket.map_size = SZ_2K;
303 cf->socket.io[0].res = io;
304
305 status = pcmcia_register_socket(&cf->socket);
306 if (status < 0)
307 goto fail2;
308
309 return 0;
310
311fail2:
312 release_mem_region(io->start, io->end + 1 - io->start);
313fail1:
314 if (cf->socket.io_offset)
315 iounmap((void __iomem *) cf->socket.io_offset);
316 if (board->irq_pin) {
317 free_irq(board->irq_pin, cf);
318fail0d:
319 gpio_free(board->irq_pin);
320 }
321fail0c:
322 if (board->vcc_pin)
323 gpio_free(board->vcc_pin);
324fail0b:
325 gpio_free(board->rst_pin);
326fail0a:
327 device_init_wakeup(&pdev->dev, 0);
328 free_irq(board->det_pin, cf);
329fail00:
330 gpio_free(board->det_pin);
331fail0:
332 kfree(cf);
333 return status;
334}
335
336static int __exit at91_cf_remove(struct platform_device *pdev)
337{
338 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
339 struct at91_cf_data *board = cf->board;
340 struct resource *io = cf->socket.io[0].res;
341
342 pcmcia_unregister_socket(&cf->socket);
343 release_mem_region(io->start, io->end + 1 - io->start);
344 iounmap((void __iomem *) cf->socket.io_offset);
345 if (board->irq_pin) {
346 free_irq(board->irq_pin, cf);
347 gpio_free(board->irq_pin);
348 }
349 if (board->vcc_pin)
350 gpio_free(board->vcc_pin);
351 gpio_free(board->rst_pin);
352 device_init_wakeup(&pdev->dev, 0);
353 free_irq(board->det_pin, cf);
354 gpio_free(board->det_pin);
355 kfree(cf);
356 return 0;
357}
358
359#ifdef CONFIG_PM
360
361static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
362{
363 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
364 struct at91_cf_data *board = cf->board;
365
366 pcmcia_socket_dev_suspend(&pdev->dev);
367 if (device_may_wakeup(&pdev->dev)) {
368 enable_irq_wake(board->det_pin);
369 if (board->irq_pin)
370 enable_irq_wake(board->irq_pin);
371 }
372 return 0;
373}
374
375static int at91_cf_resume(struct platform_device *pdev)
376{
377 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
378 struct at91_cf_data *board = cf->board;
379
380 if (device_may_wakeup(&pdev->dev)) {
381 disable_irq_wake(board->det_pin);
382 if (board->irq_pin)
383 disable_irq_wake(board->irq_pin);
384 }
385
386 pcmcia_socket_dev_resume(&pdev->dev);
387 return 0;
388}
389
390#else
391#define at91_cf_suspend NULL
392#define at91_cf_resume NULL
393#endif
394
395static struct platform_driver at91_cf_driver = {
396 .driver = {
397 .name = (char *) driver_name,
398 .owner = THIS_MODULE,
399 },
400 .remove = __exit_p(at91_cf_remove),
401 .suspend = at91_cf_suspend,
402 .resume = at91_cf_resume,
403};
404
405
406
407static int __init at91_cf_init(void)
408{
409 return platform_driver_probe(&at91_cf_driver, at91_cf_probe);
410}
411module_init(at91_cf_init);
412
413static void __exit at91_cf_exit(void)
414{
415 platform_driver_unregister(&at91_cf_driver);
416}
417module_exit(at91_cf_exit);
418
419MODULE_DESCRIPTION("AT91 Compact Flash Driver");
420MODULE_AUTHOR("David Brownell");
421MODULE_LICENSE("GPL");
422MODULE_ALIAS("platform:at91_cf");
423