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> | |
27ac792c | 31 | #include <linux/mm.h> |
2b571a06 | 32 | #include <linux/vmalloc.h> |
ad19dbdb | 33 | #include <linux/of_platform.h> |
2b571a06 OJ |
34 | |
35 | #include <pcmcia/ss.h> | |
2b571a06 OJ |
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 | ||
fe333321 | 300 | dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n", |
2b571a06 OJ |
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 | }; | |
c433a1b6 | 356 | MODULE_DEVICE_TABLE(of, electra_cf_match); |
2b571a06 OJ |
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"); |