1 /*
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>
31 #include <linux/mm.h>
32 #include <linux/vmalloc.h>
33 #include <linux/of_platform.h>
34
35 #include <pcmcia/ss.h>
36
37 static const char driver_name[] = "electra-cf";
38
39 struct electra_cf_socket {
40 struct pcmcia_socket socket;
41
42 struct timer_list timer;
43 unsigned present:1;
44 unsigned active:1;
45
46 struct of_device *ofdev;
47 unsigned long mem_phys;
48 void __iomem * mem_base;
49 unsigned long mem_size;
50 void __iomem * io_virt;
51 unsigned int io_base;
52 unsigned int io_size;
53 u_int irq;
54 struct resource iomem;
55 void __iomem * gpio_base;
56 int gpio_detect;
57 int gpio_vsense;
58 int gpio_3v;
59 int gpio_5v;
60 };
61
62 #define POLL_INTERVAL (2 * HZ)
63
64
65 static int electra_cf_present(struct electra_cf_socket *cf)
66 {
67 unsigned int gpio;
68
69 gpio = in_le32(cf->gpio_base+0x40);
70 return !(gpio & (1 << cf->gpio_detect));
71 }
72
73 static int electra_cf_ss_init(struct pcmcia_socket *s)
74 {
75 return 0;
76 }
77
78 /* the timer is primarily to kick this socket's pccardd */
79 static void electra_cf_timer(unsigned long _cf)
80 {
81 struct electra_cf_socket *cf = (void *) _cf;
82 int present = electra_cf_present(cf);
83
84 if (present != cf->present) {
85 cf->present = present;
86 pcmcia_parse_events(&cf->socket, SS_DETECT);
87 }
88
89 if (cf->active)
90 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
91 }
92
93 static irqreturn_t electra_cf_irq(int irq, void *_cf)
94 {
95 electra_cf_timer((unsigned long)_cf);
96 return IRQ_HANDLED;
97 }
98
99 static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
100 {
101 struct electra_cf_socket *cf;
102
103 if (!sp)
104 return -EINVAL;
105
106 cf = container_of(s, struct electra_cf_socket, socket);
107
108 /* NOTE CF is always 3VCARD */
109 if (electra_cf_present(cf)) {
110 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
111
112 s->pci_irq = cf->irq;
113 } else
114 *sp = 0;
115 return 0;
116 }
117
118 static int electra_cf_set_socket(struct pcmcia_socket *sock,
119 struct socket_state_t *s)
120 {
121 unsigned int gpio;
122 unsigned int vcc;
123 struct electra_cf_socket *cf;
124
125 cf = container_of(sock, struct electra_cf_socket, socket);
126
127 /* "reset" means no power in our case */
128 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
129
130 switch (vcc) {
131 case 0:
132 gpio = 0;
133 break;
134 case 33:
135 gpio = (1 << cf->gpio_3v);
136 break;
137 case 5:
138 gpio = (1 << cf->gpio_5v);
139 break;
140 default:
141 return -EINVAL;
142 }
143
144 gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
145 gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
146 out_le32(cf->gpio_base+0x90, gpio);
147
148 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
149 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
150
151 return 0;
152 }
153
154 static int electra_cf_set_io_map(struct pcmcia_socket *s,
155 struct pccard_io_map *io)
156 {
157 return 0;
158 }
159
160 static int electra_cf_set_mem_map(struct pcmcia_socket *s,
161 struct pccard_mem_map *map)
162 {
163 struct electra_cf_socket *cf;
164
165 if (map->card_start)
166 return -EINVAL;
167 cf = container_of(s, struct electra_cf_socket, socket);
168 map->static_start = cf->mem_phys;
169 map->flags &= MAP_ACTIVE|MAP_ATTRIB;
170 if (!(map->flags & MAP_ATTRIB))
171 map->static_start += 0x800;
172 return 0;
173 }
174
175 static struct pccard_operations electra_cf_ops = {
176 .init = electra_cf_ss_init,
177 .get_status = electra_cf_get_status,
178 .set_socket = electra_cf_set_socket,
179 .set_io_map = electra_cf_set_io_map,
180 .set_mem_map = electra_cf_set_mem_map,
181 };
182
183 static int __devinit electra_cf_probe(struct of_device *ofdev,
184 const struct of_device_id *match)
185 {
186 struct device *device = &ofdev->dev;
187 struct device_node *np = ofdev->node;
188 struct electra_cf_socket *cf;
189 struct resource mem, io;
190 int status;
191 const unsigned int *prop;
192 int err;
193 struct vm_struct *area;
194
195 err = of_address_to_resource(np, 0, &mem);
196 if (err)
197 return -EINVAL;
198
199 err = of_address_to_resource(np, 1, &io);
200 if (err)
201 return -EINVAL;
202
203 cf = kzalloc(sizeof *cf, GFP_KERNEL);
204 if (!cf)
205 return -ENOMEM;
206
207 setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
208 cf->irq = NO_IRQ;
209
210 cf->ofdev = ofdev;
211 cf->mem_phys = mem.start;
212 cf->mem_size = PAGE_ALIGN(mem.end - mem.start);
213 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
214 cf->io_size = PAGE_ALIGN(io.end - io.start);
215
216 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
217 if (area == NULL)
218 return -ENOMEM;
219
220 cf->io_virt = (void __iomem *)(area->addr);
221
222 cf->gpio_base = ioremap(0xfc103000, 0x1000);
223 dev_set_drvdata(device, cf);
224
225 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
226 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
227 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) {
228 dev_err(device, "can't ioremap ranges\n");
229 status = -ENOMEM;
230 goto fail1;
231 }
232
233
234 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
235
236 cf->iomem.start = (unsigned long)cf->mem_base;
237 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
238 cf->iomem.flags = IORESOURCE_MEM;
239
240 cf->irq = irq_of_parse_and_map(np, 0);
241
242 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
243 driver_name, cf);
244 if (status < 0) {
245 dev_err(device, "request_irq failed\n");
246 goto fail1;
247 }
248
249 cf->socket.pci_irq = cf->irq;
250
251 prop = of_get_property(np, "card-detect-gpio", NULL);
252 if (!prop)
253 goto fail1;
254 cf->gpio_detect = *prop;
255
256 prop = of_get_property(np, "card-vsense-gpio", NULL);
257 if (!prop)
258 goto fail1;
259 cf->gpio_vsense = *prop;
260
261 prop = of_get_property(np, "card-3v-gpio", NULL);
262 if (!prop)
263 goto fail1;
264 cf->gpio_3v = *prop;
265
266 prop = of_get_property(np, "card-5v-gpio", NULL);
267 if (!prop)
268 goto fail1;
269 cf->gpio_5v = *prop;
270
271 cf->socket.io_offset = cf->io_base;
272
273 /* reserve chip-select regions */
274 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
275 status = -ENXIO;
276 dev_err(device, "Can't claim memory region\n");
277 goto fail1;
278 }
279
280 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
281 status = -ENXIO;
282 dev_err(device, "Can't claim I/O region\n");
283 goto fail2;
284 }
285
286 cf->socket.owner = THIS_MODULE;
287 cf->socket.dev.parent = &ofdev->dev;
288 cf->socket.ops = &electra_cf_ops;
289 cf->socket.resource_ops = &pccard_static_ops;
290 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
291 SS_CAP_MEM_ALIGN;
292 cf->socket.map_size = 0x800;
293
294 status = pcmcia_register_socket(&cf->socket);
295 if (status < 0) {
296 dev_err(device, "pcmcia_register_socket failed\n");
297 goto fail3;
298 }
299
300 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
301 cf->mem_phys, io.start, cf->irq);
302
303 cf->active = 1;
304 electra_cf_timer((unsigned long)cf);
305 return 0;
306
307 fail3:
308 release_region(cf->io_base, cf->io_size);
309 fail2:
310 release_mem_region(cf->mem_phys, cf->mem_size);
311 fail1:
312 if (cf->irq != NO_IRQ)
313 free_irq(cf->irq, cf);
314
315 if (cf->io_virt)
316 __iounmap_at(cf->io_virt, cf->io_size);
317 if (cf->mem_base)
318 iounmap(cf->mem_base);
319 if (cf->gpio_base)
320 iounmap(cf->gpio_base);
321 device_init_wakeup(&ofdev->dev, 0);
322 kfree(cf);
323 return status;
324
325 }
326
327 static int __devexit electra_cf_remove(struct of_device *ofdev)
328 {
329 struct device *device = &ofdev->dev;
330 struct electra_cf_socket *cf;
331
332 cf = dev_get_drvdata(device);
333
334 cf->active = 0;
335 pcmcia_unregister_socket(&cf->socket);
336 free_irq(cf->irq, cf);
337 del_timer_sync(&cf->timer);
338
339 __iounmap_at(cf->io_virt, cf->io_size);
340 iounmap(cf->mem_base);
341 iounmap(cf->gpio_base);
342 release_mem_region(cf->mem_phys, cf->mem_size);
343 release_region(cf->io_base, cf->io_size);
344
345 kfree(cf);
346
347 return 0;
348 }
349
350 static struct of_device_id electra_cf_match[] = {
351 {
352 .compatible = "electra-cf",
353 },
354 {},
355 };
356 MODULE_DEVICE_TABLE(of, electra_cf_match);
357
358 static struct of_platform_driver electra_cf_driver = {
359 .name = (char *)driver_name,
360 .match_table = electra_cf_match,
361 .probe = electra_cf_probe,
362 .remove = electra_cf_remove,
363 };
364
365 static int __init electra_cf_init(void)
366 {
367 return of_register_platform_driver(&electra_cf_driver);
368 }
369 module_init(electra_cf_init);
370
371 static void __exit electra_cf_exit(void)
372 {
373 of_unregister_platform_driver(&electra_cf_driver);
374 }
375 module_exit(electra_cf_exit);
376
377 MODULE_LICENSE("GPL");
378 MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
379 MODULE_DESCRIPTION("PA Semi Electra CF driver");
380
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