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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#include <linux/slab.h>
35
36#include <pcmcia/ss.h>
37
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 platform_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
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
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
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);
146 gpio |= 1 << (cf->gpio_5v + 16);
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 electra_cf_probe(struct platform_device *ofdev)
185{
186 struct device *device = &ofdev->dev;
187 struct device_node *np = ofdev->dev.of_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(resource_size(&mem));
213 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
214 cf->io_size = PAGE_ALIGN(resource_size(&io));
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
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
307fail3:
308 release_region(cf->io_base, cf->io_size);
309fail2:
310 release_mem_region(cf->mem_phys, cf->mem_size);
311fail1:
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
327static int electra_cf_remove(struct platform_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
350static const struct of_device_id electra_cf_match[] = {
351 {
352 .compatible = "electra-cf",
353 },
354 {},
355};
356MODULE_DEVICE_TABLE(of, electra_cf_match);
357
358static struct platform_driver electra_cf_driver = {
359 .driver = {
360 .name = (char *)driver_name,
361 .owner = THIS_MODULE,
362 .of_match_table = electra_cf_match,
363 },
364 .probe = electra_cf_probe,
365 .remove = electra_cf_remove,
366};
367
368module_platform_driver(electra_cf_driver);
369
370MODULE_LICENSE("GPL");
371MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
372MODULE_DESCRIPTION("PA Semi Electra CF driver");
373
