Commit | Line | Data |
---|---|---|
2b571a06 OJ |
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/vmalloc.h> | |
32 | ||
33 | #include <pcmcia/ss.h> | |
34 | #include <asm/of_platform.h> | |
35 | ||
36 | static const char driver_name[] = "electra-cf"; | |
37 | ||
38 | struct electra_cf_socket { | |
39 | struct pcmcia_socket socket; | |
40 | ||
41 | struct timer_list timer; | |
42 | unsigned present:1; | |
43 | unsigned active:1; | |
44 | ||
45 | struct of_device *ofdev; | |
46 | unsigned long mem_phys; | |
47 | void __iomem * mem_base; | |
48 | unsigned long mem_size; | |
49 | void __iomem * io_virt; | |
50 | unsigned int io_base; | |
51 | unsigned int io_size; | |
52 | u_int irq; | |
53 | struct resource iomem; | |
54 | void __iomem * gpio_base; | |
55 | int gpio_detect; | |
56 | int gpio_vsense; | |
57 | int gpio_3v; | |
58 | int gpio_5v; | |
59 | }; | |
60 | ||
61 | #define POLL_INTERVAL (2 * HZ) | |
62 | ||
63 | ||
64 | static int electra_cf_present(struct electra_cf_socket *cf) | |
65 | { | |
66 | unsigned int gpio; | |
67 | ||
68 | gpio = in_le32(cf->gpio_base+0x40); | |
69 | return !(gpio & (1 << cf->gpio_detect)); | |
70 | } | |
71 | ||
72 | static int electra_cf_ss_init(struct pcmcia_socket *s) | |
73 | { | |
74 | return 0; | |
75 | } | |
76 | ||
77 | /* the timer is primarily to kick this socket's pccardd */ | |
78 | static void electra_cf_timer(unsigned long _cf) | |
79 | { | |
80 | struct electra_cf_socket *cf = (void *) _cf; | |
81 | int present = electra_cf_present(cf); | |
82 | ||
83 | if (present != cf->present) { | |
84 | cf->present = present; | |
85 | pcmcia_parse_events(&cf->socket, SS_DETECT); | |
86 | } | |
87 | ||
88 | if (cf->active) | |
89 | mod_timer(&cf->timer, jiffies + POLL_INTERVAL); | |
90 | } | |
91 | ||
92 | static irqreturn_t electra_cf_irq(int irq, void *_cf) | |
93 | { | |
94 | electra_cf_timer((unsigned long)_cf); | |
95 | return IRQ_HANDLED; | |
96 | } | |
97 | ||
98 | static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp) | |
99 | { | |
100 | struct electra_cf_socket *cf; | |
101 | ||
102 | if (!sp) | |
103 | return -EINVAL; | |
104 | ||
105 | cf = container_of(s, struct electra_cf_socket, socket); | |
106 | ||
107 | /* NOTE CF is always 3VCARD */ | |
108 | if (electra_cf_present(cf)) { | |
109 | *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD; | |
110 | ||
111 | s->pci_irq = cf->irq; | |
112 | } else | |
113 | *sp = 0; | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static int electra_cf_set_socket(struct pcmcia_socket *sock, | |
118 | struct socket_state_t *s) | |
119 | { | |
120 | unsigned int gpio; | |
121 | unsigned int vcc; | |
122 | struct electra_cf_socket *cf; | |
123 | ||
124 | cf = container_of(sock, struct electra_cf_socket, socket); | |
125 | ||
126 | /* "reset" means no power in our case */ | |
127 | vcc = (s->flags & SS_RESET) ? 0 : s->Vcc; | |
128 | ||
129 | switch (vcc) { | |
130 | case 0: | |
131 | gpio = 0; | |
132 | break; | |
133 | case 33: | |
134 | gpio = (1 << cf->gpio_3v); | |
135 | break; | |
136 | case 5: | |
137 | gpio = (1 << cf->gpio_5v); | |
138 | break; | |
139 | default: | |
140 | return -EINVAL; | |
141 | } | |
142 | ||
143 | gpio |= 1 << (cf->gpio_3v + 16); /* enwr */ | |
144 | gpio |= 1 << (cf->gpio_5v + 16); /* enwr */ | |
145 | out_le32(cf->gpio_base+0x90, gpio); | |
146 | ||
147 | pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n", | |
148 | driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int electra_cf_set_io_map(struct pcmcia_socket *s, | |
154 | struct pccard_io_map *io) | |
155 | { | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int electra_cf_set_mem_map(struct pcmcia_socket *s, | |
160 | struct pccard_mem_map *map) | |
161 | { | |
162 | struct electra_cf_socket *cf; | |
163 | ||
164 | if (map->card_start) | |
165 | return -EINVAL; | |
166 | cf = container_of(s, struct electra_cf_socket, socket); | |
167 | map->static_start = cf->mem_phys; | |
168 | map->flags &= MAP_ACTIVE|MAP_ATTRIB; | |
169 | if (!(map->flags & MAP_ATTRIB)) | |
170 | map->static_start += 0x800; | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static struct pccard_operations electra_cf_ops = { | |
175 | .init = electra_cf_ss_init, | |
176 | .get_status = electra_cf_get_status, | |
177 | .set_socket = electra_cf_set_socket, | |
178 | .set_io_map = electra_cf_set_io_map, | |
179 | .set_mem_map = electra_cf_set_mem_map, | |
180 | }; | |
181 | ||
182 | static int __devinit electra_cf_probe(struct of_device *ofdev, | |
183 | const struct of_device_id *match) | |
184 | { | |
185 | struct device *device = &ofdev->dev; | |
186 | struct device_node *np = ofdev->node; | |
187 | struct electra_cf_socket *cf; | |
188 | struct resource mem, io; | |
189 | int status; | |
190 | const unsigned int *prop; | |
191 | int err; | |
192 | struct vm_struct *area; | |
193 | ||
194 | err = of_address_to_resource(np, 0, &mem); | |
195 | if (err) | |
196 | return -EINVAL; | |
197 | ||
198 | err = of_address_to_resource(np, 1, &io); | |
199 | if (err) | |
200 | return -EINVAL; | |
201 | ||
202 | cf = kzalloc(sizeof *cf, GFP_KERNEL); | |
203 | if (!cf) | |
204 | return -ENOMEM; | |
205 | ||
206 | setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf); | |
207 | cf->irq = NO_IRQ; | |
208 | ||
209 | cf->ofdev = ofdev; | |
210 | cf->mem_phys = mem.start; | |
211 | cf->mem_size = PAGE_ALIGN(mem.end - mem.start); | |
212 | cf->mem_base = ioremap(cf->mem_phys, cf->mem_size); | |
213 | cf->io_size = PAGE_ALIGN(io.end - io.start); | |
214 | ||
215 | area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END); | |
216 | if (area == NULL) | |
217 | return -ENOMEM; | |
218 | ||
219 | cf->io_virt = (void __iomem *)(area->addr); | |
220 | ||
221 | cf->gpio_base = ioremap(0xfc103000, 0x1000); | |
222 | dev_set_drvdata(device, cf); | |
223 | ||
224 | if (!cf->mem_base || !cf->io_virt || !cf->gpio_base || | |
225 | (__ioremap_at(io.start, cf->io_virt, cf->io_size, | |
226 | _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) { | |
227 | dev_err(device, "can't ioremap ranges\n"); | |
228 | status = -ENOMEM; | |
229 | goto fail1; | |
230 | } | |
231 | ||
232 | ||
233 | cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END; | |
234 | ||
235 | cf->iomem.start = (unsigned long)cf->mem_base; | |
236 | cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start); | |
237 | cf->iomem.flags = IORESOURCE_MEM; | |
238 | ||
239 | cf->irq = irq_of_parse_and_map(np, 0); | |
240 | ||
241 | status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED, | |
242 | driver_name, cf); | |
243 | if (status < 0) { | |
244 | dev_err(device, "request_irq failed\n"); | |
245 | goto fail1; | |
246 | } | |
247 | ||
248 | cf->socket.pci_irq = cf->irq; | |
249 | ||
250 | prop = of_get_property(np, "card-detect-gpio", NULL); | |
251 | if (!prop) | |
252 | goto fail1; | |
253 | cf->gpio_detect = *prop; | |
254 | ||
255 | prop = of_get_property(np, "card-vsense-gpio", NULL); | |
256 | if (!prop) | |
257 | goto fail1; | |
258 | cf->gpio_vsense = *prop; | |
259 | ||
260 | prop = of_get_property(np, "card-3v-gpio", NULL); | |
261 | if (!prop) | |
262 | goto fail1; | |
263 | cf->gpio_3v = *prop; | |
264 | ||
265 | prop = of_get_property(np, "card-5v-gpio", NULL); | |
266 | if (!prop) | |
267 | goto fail1; | |
268 | cf->gpio_5v = *prop; | |
269 | ||
270 | cf->socket.io_offset = cf->io_base; | |
271 | ||
272 | /* reserve chip-select regions */ | |
273 | if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) { | |
274 | status = -ENXIO; | |
275 | dev_err(device, "Can't claim memory region\n"); | |
276 | goto fail1; | |
277 | } | |
278 | ||
279 | if (!request_region(cf->io_base, cf->io_size, driver_name)) { | |
280 | status = -ENXIO; | |
281 | dev_err(device, "Can't claim I/O region\n"); | |
282 | goto fail2; | |
283 | } | |
284 | ||
285 | cf->socket.owner = THIS_MODULE; | |
286 | cf->socket.dev.parent = &ofdev->dev; | |
287 | cf->socket.ops = &electra_cf_ops; | |
288 | cf->socket.resource_ops = &pccard_static_ops; | |
289 | cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | | |
290 | SS_CAP_MEM_ALIGN; | |
291 | cf->socket.map_size = 0x800; | |
292 | ||
293 | status = pcmcia_register_socket(&cf->socket); | |
294 | if (status < 0) { | |
295 | dev_err(device, "pcmcia_register_socket failed\n"); | |
296 | goto fail3; | |
297 | } | |
298 | ||
299 | dev_info(device, "at mem 0x%lx io 0x%lx irq %d\n", | |
300 | cf->mem_phys, io.start, cf->irq); | |
301 | ||
302 | cf->active = 1; | |
303 | electra_cf_timer((unsigned long)cf); | |
304 | return 0; | |
305 | ||
306 | fail3: | |
307 | release_region(cf->io_base, cf->io_size); | |
308 | fail2: | |
309 | release_mem_region(cf->mem_phys, cf->mem_size); | |
310 | fail1: | |
311 | if (cf->irq != NO_IRQ) | |
312 | free_irq(cf->irq, cf); | |
313 | ||
314 | if (cf->io_virt) | |
315 | __iounmap_at(cf->io_virt, cf->io_size); | |
316 | if (cf->mem_base) | |
317 | iounmap(cf->mem_base); | |
318 | if (cf->gpio_base) | |
319 | iounmap(cf->gpio_base); | |
320 | device_init_wakeup(&ofdev->dev, 0); | |
321 | kfree(cf); | |
322 | return status; | |
323 | ||
324 | } | |
325 | ||
326 | static int __devexit electra_cf_remove(struct of_device *ofdev) | |
327 | { | |
328 | struct device *device = &ofdev->dev; | |
329 | struct electra_cf_socket *cf; | |
330 | ||
331 | cf = dev_get_drvdata(device); | |
332 | ||
333 | cf->active = 0; | |
334 | pcmcia_unregister_socket(&cf->socket); | |
335 | free_irq(cf->irq, cf); | |
336 | del_timer_sync(&cf->timer); | |
337 | ||
338 | __iounmap_at(cf->io_virt, cf->io_size); | |
339 | iounmap(cf->mem_base); | |
340 | iounmap(cf->gpio_base); | |
341 | release_mem_region(cf->mem_phys, cf->mem_size); | |
342 | release_region(cf->io_base, cf->io_size); | |
343 | ||
344 | kfree(cf); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | static struct of_device_id electra_cf_match[] = { | |
350 | { | |
351 | .compatible = "electra-cf", | |
352 | }, | |
353 | {}, | |
354 | }; | |
355 | ||
356 | static struct of_platform_driver electra_cf_driver = { | |
357 | .name = (char *)driver_name, | |
358 | .match_table = electra_cf_match, | |
359 | .probe = electra_cf_probe, | |
360 | .remove = electra_cf_remove, | |
361 | }; | |
362 | ||
363 | static int __init electra_cf_init(void) | |
364 | { | |
365 | return of_register_platform_driver(&electra_cf_driver); | |
366 | } | |
367 | module_init(electra_cf_init); | |
368 | ||
369 | static void __exit electra_cf_exit(void) | |
370 | { | |
371 | of_unregister_platform_driver(&electra_cf_driver); | |
372 | } | |
373 | module_exit(electra_cf_exit); | |
374 | ||
375 | MODULE_LICENSE("GPL"); | |
376 | MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); | |
377 | MODULE_DESCRIPTION("PA Semi Electra CF driver"); |