blob: 2e59fe947d28095c15fb96327499e07edd8b32ea [file] [log] [blame]
Olof Johansson2b571a02007-10-16 23:26:20 -07001/*
2 * Copyright (C) 2007 PA Semi, Inc
3 *
4 * Maintained by: Olof Johansson <olof@lixom.net>
5 *
6 * Based on drivers/pcmcia/omap_cf.c
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#include <linux/module.h>
24#include <linux/kernel.h>
25#include <linux/sched.h>
26#include <linux/platform_device.h>
27#include <linux/errno.h>
28#include <linux/init.h>
29#include <linux/delay.h>
30#include <linux/interrupt.h>
Andrea Righi27ac7922008-07-23 21:28:13 -070031#include <linux/mm.h>
Olof Johansson2b571a02007-10-16 23:26:20 -070032#include <linux/vmalloc.h>
Stephen Rothwellad19dbd2008-05-23 16:31:08 +100033#include <linux/of_platform.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090034#include <linux/slab.h>
Olof Johansson2b571a02007-10-16 23:26:20 -070035
36#include <pcmcia/ss.h>
Olof Johansson2b571a02007-10-16 23:26:20 -070037
38static const char driver_name[] = "electra-cf";
39
40struct electra_cf_socket {
41 struct pcmcia_socket socket;
42
43 struct timer_list timer;
44 unsigned present:1;
45 unsigned active:1;
46
47 struct of_device *ofdev;
48 unsigned long mem_phys;
49 void __iomem * mem_base;
50 unsigned long mem_size;
51 void __iomem * io_virt;
52 unsigned int io_base;
53 unsigned int io_size;
54 u_int irq;
55 struct resource iomem;
56 void __iomem * gpio_base;
57 int gpio_detect;
58 int gpio_vsense;
59 int gpio_3v;
60 int gpio_5v;
61};
62
63#define POLL_INTERVAL (2 * HZ)
64
65
66static int electra_cf_present(struct electra_cf_socket *cf)
67{
68 unsigned int gpio;
69
70 gpio = in_le32(cf->gpio_base+0x40);
71 return !(gpio & (1 << cf->gpio_detect));
72}
73
74static int electra_cf_ss_init(struct pcmcia_socket *s)
75{
76 return 0;
77}
78
79/* the timer is primarily to kick this socket's pccardd */
80static void electra_cf_timer(unsigned long _cf)
81{
82 struct electra_cf_socket *cf = (void *) _cf;
83 int present = electra_cf_present(cf);
84
85 if (present != cf->present) {
86 cf->present = present;
87 pcmcia_parse_events(&cf->socket, SS_DETECT);
88 }
89
90 if (cf->active)
91 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
92}
93
94static irqreturn_t electra_cf_irq(int irq, void *_cf)
95{
96 electra_cf_timer((unsigned long)_cf);
97 return IRQ_HANDLED;
98}
99
100static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
101{
102 struct electra_cf_socket *cf;
103
104 if (!sp)
105 return -EINVAL;
106
107 cf = container_of(s, struct electra_cf_socket, socket);
108
109 /* NOTE CF is always 3VCARD */
110 if (electra_cf_present(cf)) {
111 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
112
113 s->pci_irq = cf->irq;
114 } else
115 *sp = 0;
116 return 0;
117}
118
119static int electra_cf_set_socket(struct pcmcia_socket *sock,
120 struct socket_state_t *s)
121{
122 unsigned int gpio;
123 unsigned int vcc;
124 struct electra_cf_socket *cf;
125
126 cf = container_of(sock, struct electra_cf_socket, socket);
127
128 /* "reset" means no power in our case */
129 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
130
131 switch (vcc) {
132 case 0:
133 gpio = 0;
134 break;
135 case 33:
136 gpio = (1 << cf->gpio_3v);
137 break;
138 case 5:
139 gpio = (1 << cf->gpio_5v);
140 break;
141 default:
142 return -EINVAL;
143 }
144
145 gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
146 gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
147 out_le32(cf->gpio_base+0x90, gpio);
148
149 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
150 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
151
152 return 0;
153}
154
155static int electra_cf_set_io_map(struct pcmcia_socket *s,
156 struct pccard_io_map *io)
157{
158 return 0;
159}
160
161static int electra_cf_set_mem_map(struct pcmcia_socket *s,
162 struct pccard_mem_map *map)
163{
164 struct electra_cf_socket *cf;
165
166 if (map->card_start)
167 return -EINVAL;
168 cf = container_of(s, struct electra_cf_socket, socket);
169 map->static_start = cf->mem_phys;
170 map->flags &= MAP_ACTIVE|MAP_ATTRIB;
171 if (!(map->flags & MAP_ATTRIB))
172 map->static_start += 0x800;
173 return 0;
174}
175
176static struct pccard_operations electra_cf_ops = {
177 .init = electra_cf_ss_init,
178 .get_status = electra_cf_get_status,
179 .set_socket = electra_cf_set_socket,
180 .set_io_map = electra_cf_set_io_map,
181 .set_mem_map = electra_cf_set_mem_map,
182};
183
184static int __devinit electra_cf_probe(struct of_device *ofdev,
185 const struct of_device_id *match)
186{
187 struct device *device = &ofdev->dev;
188 struct device_node *np = ofdev->node;
189 struct electra_cf_socket *cf;
190 struct resource mem, io;
191 int status;
192 const unsigned int *prop;
193 int err;
194 struct vm_struct *area;
195
196 err = of_address_to_resource(np, 0, &mem);
197 if (err)
198 return -EINVAL;
199
200 err = of_address_to_resource(np, 1, &io);
201 if (err)
202 return -EINVAL;
203
204 cf = kzalloc(sizeof *cf, GFP_KERNEL);
205 if (!cf)
206 return -ENOMEM;
207
208 setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
209 cf->irq = NO_IRQ;
210
211 cf->ofdev = ofdev;
212 cf->mem_phys = mem.start;
213 cf->mem_size = PAGE_ALIGN(mem.end - mem.start);
214 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
215 cf->io_size = PAGE_ALIGN(io.end - io.start);
216
217 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
218 if (area == NULL)
219 return -ENOMEM;
220
221 cf->io_virt = (void __iomem *)(area->addr);
222
223 cf->gpio_base = ioremap(0xfc103000, 0x1000);
224 dev_set_drvdata(device, cf);
225
226 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
227 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
228 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) {
229 dev_err(device, "can't ioremap ranges\n");
230 status = -ENOMEM;
231 goto fail1;
232 }
233
234
235 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
236
237 cf->iomem.start = (unsigned long)cf->mem_base;
238 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
239 cf->iomem.flags = IORESOURCE_MEM;
240
241 cf->irq = irq_of_parse_and_map(np, 0);
242
243 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
244 driver_name, cf);
245 if (status < 0) {
246 dev_err(device, "request_irq failed\n");
247 goto fail1;
248 }
249
250 cf->socket.pci_irq = cf->irq;
251
252 prop = of_get_property(np, "card-detect-gpio", NULL);
253 if (!prop)
254 goto fail1;
255 cf->gpio_detect = *prop;
256
257 prop = of_get_property(np, "card-vsense-gpio", NULL);
258 if (!prop)
259 goto fail1;
260 cf->gpio_vsense = *prop;
261
262 prop = of_get_property(np, "card-3v-gpio", NULL);
263 if (!prop)
264 goto fail1;
265 cf->gpio_3v = *prop;
266
267 prop = of_get_property(np, "card-5v-gpio", NULL);
268 if (!prop)
269 goto fail1;
270 cf->gpio_5v = *prop;
271
272 cf->socket.io_offset = cf->io_base;
273
274 /* reserve chip-select regions */
275 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
276 status = -ENXIO;
277 dev_err(device, "Can't claim memory region\n");
278 goto fail1;
279 }
280
281 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
282 status = -ENXIO;
283 dev_err(device, "Can't claim I/O region\n");
284 goto fail2;
285 }
286
287 cf->socket.owner = THIS_MODULE;
288 cf->socket.dev.parent = &ofdev->dev;
289 cf->socket.ops = &electra_cf_ops;
290 cf->socket.resource_ops = &pccard_static_ops;
291 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
292 SS_CAP_MEM_ALIGN;
293 cf->socket.map_size = 0x800;
294
295 status = pcmcia_register_socket(&cf->socket);
296 if (status < 0) {
297 dev_err(device, "pcmcia_register_socket failed\n");
298 goto fail3;
299 }
300
Ingo Molnarfe333322009-01-06 14:26:03 +0000301 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
Olof Johansson2b571a02007-10-16 23:26:20 -0700302 cf->mem_phys, io.start, cf->irq);
303
304 cf->active = 1;
305 electra_cf_timer((unsigned long)cf);
306 return 0;
307
308fail3:
309 release_region(cf->io_base, cf->io_size);
310fail2:
311 release_mem_region(cf->mem_phys, cf->mem_size);
312fail1:
313 if (cf->irq != NO_IRQ)
314 free_irq(cf->irq, cf);
315
316 if (cf->io_virt)
317 __iounmap_at(cf->io_virt, cf->io_size);
318 if (cf->mem_base)
319 iounmap(cf->mem_base);
320 if (cf->gpio_base)
321 iounmap(cf->gpio_base);
322 device_init_wakeup(&ofdev->dev, 0);
323 kfree(cf);
324 return status;
325
326}
327
328static int __devexit electra_cf_remove(struct of_device *ofdev)
329{
330 struct device *device = &ofdev->dev;
331 struct electra_cf_socket *cf;
332
333 cf = dev_get_drvdata(device);
334
335 cf->active = 0;
336 pcmcia_unregister_socket(&cf->socket);
337 free_irq(cf->irq, cf);
338 del_timer_sync(&cf->timer);
339
340 __iounmap_at(cf->io_virt, cf->io_size);
341 iounmap(cf->mem_base);
342 iounmap(cf->gpio_base);
343 release_mem_region(cf->mem_phys, cf->mem_size);
344 release_region(cf->io_base, cf->io_size);
345
346 kfree(cf);
347
348 return 0;
349}
350
Márton Németh63c9a8b2010-01-12 08:56:13 +0100351static const struct of_device_id electra_cf_match[] = {
Olof Johansson2b571a02007-10-16 23:26:20 -0700352 {
353 .compatible = "electra-cf",
354 },
355 {},
356};
Olof Johanssonc433a1b2008-05-27 16:07:26 -0500357MODULE_DEVICE_TABLE(of, electra_cf_match);
Olof Johansson2b571a02007-10-16 23:26:20 -0700358
359static struct of_platform_driver electra_cf_driver = {
360 .name = (char *)driver_name,
361 .match_table = electra_cf_match,
362 .probe = electra_cf_probe,
363 .remove = electra_cf_remove,
364};
365
366static int __init electra_cf_init(void)
367{
368 return of_register_platform_driver(&electra_cf_driver);
369}
370module_init(electra_cf_init);
371
372static void __exit electra_cf_exit(void)
373{
374 of_unregister_platform_driver(&electra_cf_driver);
375}
376module_exit(electra_cf_exit);
377
378MODULE_LICENSE("GPL");
379MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
380MODULE_DESCRIPTION("PA Semi Electra CF driver");