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10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/sched.h>
13#include <linux/platform_device.h>
14#include <linux/errno.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/interrupt.h>
18#include <linux/mm.h>
19#include <linux/vmalloc.h>
20#include <linux/of_address.h>
21#include <linux/of_irq.h>
22#include <linux/of_platform.h>
23#include <linux/slab.h>
24
25#include <pcmcia/ss.h>
26
27static const char driver_name[] = "electra-cf";
28
29struct electra_cf_socket {
30 struct pcmcia_socket socket;
31
32 struct timer_list timer;
33 unsigned present:1;
34 unsigned active:1;
35
36 struct platform_device *ofdev;
37 unsigned long mem_phys;
38 void __iomem *mem_base;
39 unsigned long mem_size;
40 void __iomem *io_virt;
41 unsigned int io_base;
42 unsigned int io_size;
43 u_int irq;
44 struct resource iomem;
45 void __iomem *gpio_base;
46 int gpio_detect;
47 int gpio_vsense;
48 int gpio_3v;
49 int gpio_5v;
50};
51
52#define POLL_INTERVAL (2 * HZ)
53
54
55static int electra_cf_present(struct electra_cf_socket *cf)
56{
57 unsigned int gpio;
58
59 gpio = in_le32(cf->gpio_base+0x40);
60 return !(gpio & (1 << cf->gpio_detect));
61}
62
63static int electra_cf_ss_init(struct pcmcia_socket *s)
64{
65 return 0;
66}
67
68
69static void electra_cf_timer(struct timer_list *t)
70{
71 struct electra_cf_socket *cf = from_timer(cf, t, timer);
72 int present = electra_cf_present(cf);
73
74 if (present != cf->present) {
75 cf->present = present;
76 pcmcia_parse_events(&cf->socket, SS_DETECT);
77 }
78
79 if (cf->active)
80 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
81}
82
83static irqreturn_t electra_cf_irq(int irq, void *_cf)
84{
85 struct electra_cf_socket *cf = _cf;
86
87 electra_cf_timer(&cf->timer);
88 return IRQ_HANDLED;
89}
90
91static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
92{
93 struct electra_cf_socket *cf;
94
95 if (!sp)
96 return -EINVAL;
97
98 cf = container_of(s, struct electra_cf_socket, socket);
99
100
101 if (electra_cf_present(cf)) {
102 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
103
104 s->pci_irq = cf->irq;
105 } else
106 *sp = 0;
107 return 0;
108}
109
110static int electra_cf_set_socket(struct pcmcia_socket *sock,
111 struct socket_state_t *s)
112{
113 unsigned int gpio;
114 unsigned int vcc;
115 struct electra_cf_socket *cf;
116
117 cf = container_of(sock, struct electra_cf_socket, socket);
118
119
120 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
121
122 switch (vcc) {
123 case 0:
124 gpio = 0;
125 break;
126 case 33:
127 gpio = (1 << cf->gpio_3v);
128 break;
129 case 5:
130 gpio = (1 << cf->gpio_5v);
131 break;
132 default:
133 return -EINVAL;
134 }
135
136 gpio |= 1 << (cf->gpio_3v + 16);
137 gpio |= 1 << (cf->gpio_5v + 16);
138 out_le32(cf->gpio_base+0x90, gpio);
139
140 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
141 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
142
143 return 0;
144}
145
146static int electra_cf_set_io_map(struct pcmcia_socket *s,
147 struct pccard_io_map *io)
148{
149 return 0;
150}
151
152static int electra_cf_set_mem_map(struct pcmcia_socket *s,
153 struct pccard_mem_map *map)
154{
155 struct electra_cf_socket *cf;
156
157 if (map->card_start)
158 return -EINVAL;
159 cf = container_of(s, struct electra_cf_socket, socket);
160 map->static_start = cf->mem_phys;
161 map->flags &= MAP_ACTIVE|MAP_ATTRIB;
162 if (!(map->flags & MAP_ATTRIB))
163 map->static_start += 0x800;
164 return 0;
165}
166
167static struct pccard_operations electra_cf_ops = {
168 .init = electra_cf_ss_init,
169 .get_status = electra_cf_get_status,
170 .set_socket = electra_cf_set_socket,
171 .set_io_map = electra_cf_set_io_map,
172 .set_mem_map = electra_cf_set_mem_map,
173};
174
175static int electra_cf_probe(struct platform_device *ofdev)
176{
177 struct device *device = &ofdev->dev;
178 struct device_node *np = ofdev->dev.of_node;
179 struct electra_cf_socket *cf;
180 struct resource mem, io;
181 int status;
182 const unsigned int *prop;
183 int err;
184 struct vm_struct *area;
185
186 err = of_address_to_resource(np, 0, &mem);
187 if (err)
188 return -EINVAL;
189
190 err = of_address_to_resource(np, 1, &io);
191 if (err)
192 return -EINVAL;
193
194 cf = kzalloc(sizeof(*cf), GFP_KERNEL);
195 if (!cf)
196 return -ENOMEM;
197
198 timer_setup(&cf->timer, electra_cf_timer, 0);
199 cf->irq = 0;
200
201 cf->ofdev = ofdev;
202 cf->mem_phys = mem.start;
203 cf->mem_size = PAGE_ALIGN(resource_size(&mem));
204 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
205 cf->io_size = PAGE_ALIGN(resource_size(&io));
206
207 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
208 if (area == NULL) {
209 status = -ENOMEM;
210 goto fail1;
211 }
212
213 cf->io_virt = (void __iomem *)(area->addr);
214
215 cf->gpio_base = ioremap(0xfc103000, 0x1000);
216 dev_set_drvdata(device, cf);
217
218 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
219 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
220 pgprot_noncached(PAGE_KERNEL)) == NULL)) {
221 dev_err(device, "can't ioremap ranges\n");
222 status = -ENOMEM;
223 goto fail1;
224 }
225
226
227 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
228
229 cf->iomem.start = (unsigned long)cf->mem_base;
230 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
231 cf->iomem.flags = IORESOURCE_MEM;
232
233 cf->irq = irq_of_parse_and_map(np, 0);
234
235 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
236 driver_name, cf);
237 if (status < 0) {
238 dev_err(device, "request_irq failed\n");
239 goto fail1;
240 }
241
242 cf->socket.pci_irq = cf->irq;
243
244 prop = of_get_property(np, "card-detect-gpio", NULL);
245 if (!prop)
246 goto fail1;
247 cf->gpio_detect = *prop;
248
249 prop = of_get_property(np, "card-vsense-gpio", NULL);
250 if (!prop)
251 goto fail1;
252 cf->gpio_vsense = *prop;
253
254 prop = of_get_property(np, "card-3v-gpio", NULL);
255 if (!prop)
256 goto fail1;
257 cf->gpio_3v = *prop;
258
259 prop = of_get_property(np, "card-5v-gpio", NULL);
260 if (!prop)
261 goto fail1;
262 cf->gpio_5v = *prop;
263
264 cf->socket.io_offset = cf->io_base;
265
266
267 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
268 status = -ENXIO;
269 dev_err(device, "Can't claim memory region\n");
270 goto fail1;
271 }
272
273 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
274 status = -ENXIO;
275 dev_err(device, "Can't claim I/O region\n");
276 goto fail2;
277 }
278
279 cf->socket.owner = THIS_MODULE;
280 cf->socket.dev.parent = &ofdev->dev;
281 cf->socket.ops = &electra_cf_ops;
282 cf->socket.resource_ops = &pccard_static_ops;
283 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
284 SS_CAP_MEM_ALIGN;
285 cf->socket.map_size = 0x800;
286
287 status = pcmcia_register_socket(&cf->socket);
288 if (status < 0) {
289 dev_err(device, "pcmcia_register_socket failed\n");
290 goto fail3;
291 }
292
293 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
294 cf->mem_phys, io.start, cf->irq);
295
296 cf->active = 1;
297 electra_cf_timer(&cf->timer);
298 return 0;
299
300fail3:
301 release_region(cf->io_base, cf->io_size);
302fail2:
303 release_mem_region(cf->mem_phys, cf->mem_size);
304fail1:
305 if (cf->irq)
306 free_irq(cf->irq, cf);
307
308 if (cf->io_virt)
309 __iounmap_at(cf->io_virt, cf->io_size);
310 if (cf->mem_base)
311 iounmap(cf->mem_base);
312 if (cf->gpio_base)
313 iounmap(cf->gpio_base);
314 if (area)
315 device_init_wakeup(&ofdev->dev, 0);
316 kfree(cf);
317 return status;
318
319}
320
321static int electra_cf_remove(struct platform_device *ofdev)
322{
323 struct device *device = &ofdev->dev;
324 struct electra_cf_socket *cf;
325
326 cf = dev_get_drvdata(device);
327
328 cf->active = 0;
329 pcmcia_unregister_socket(&cf->socket);
330 free_irq(cf->irq, cf);
331 del_timer_sync(&cf->timer);
332
333 __iounmap_at(cf->io_virt, cf->io_size);
334 iounmap(cf->mem_base);
335 iounmap(cf->gpio_base);
336 release_mem_region(cf->mem_phys, cf->mem_size);
337 release_region(cf->io_base, cf->io_size);
338
339 kfree(cf);
340
341 return 0;
342}
343
344static const struct of_device_id electra_cf_match[] = {
345 {
346 .compatible = "electra-cf",
347 },
348 {},
349};
350MODULE_DEVICE_TABLE(of, electra_cf_match);
351
352static struct platform_driver electra_cf_driver = {
353 .driver = {
354 .name = driver_name,
355 .of_match_table = electra_cf_match,
356 },
357 .probe = electra_cf_probe,
358 .remove = electra_cf_remove,
359};
360
361module_platform_driver(electra_cf_driver);
362
363MODULE_LICENSE("GPL");
364MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
365MODULE_DESCRIPTION("PA Semi Electra CF driver");
366
