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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_address.h>
34#include <linux/of_irq.h>
35#include <linux/of_platform.h>
36#include <linux/slab.h>
37
38#include <pcmcia/ss.h>
39
40static const char driver_name[] = "electra-cf";
41
42struct electra_cf_socket {
43 struct pcmcia_socket socket;
44
45 struct timer_list timer;
46 unsigned present:1;
47 unsigned active:1;
48
49 struct platform_device *ofdev;
50 unsigned long mem_phys;
51 void __iomem * mem_base;
52 unsigned long mem_size;
53 void __iomem * io_virt;
54 unsigned int io_base;
55 unsigned int io_size;
56 u_int irq;
57 struct resource iomem;
58 void __iomem * gpio_base;
59 int gpio_detect;
60 int gpio_vsense;
61 int gpio_3v;
62 int gpio_5v;
63};
64
65#define POLL_INTERVAL (2 * HZ)
66
67
68static int electra_cf_present(struct electra_cf_socket *cf)
69{
70 unsigned int gpio;
71
72 gpio = in_le32(cf->gpio_base+0x40);
73 return !(gpio & (1 << cf->gpio_detect));
74}
75
76static int electra_cf_ss_init(struct pcmcia_socket *s)
77{
78 return 0;
79}
80
81
82static void electra_cf_timer(unsigned long _cf)
83{
84 struct electra_cf_socket *cf = (void *) _cf;
85 int present = electra_cf_present(cf);
86
87 if (present != cf->present) {
88 cf->present = present;
89 pcmcia_parse_events(&cf->socket, SS_DETECT);
90 }
91
92 if (cf->active)
93 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
94}
95
96static irqreturn_t electra_cf_irq(int irq, void *_cf)
97{
98 electra_cf_timer((unsigned long)_cf);
99 return IRQ_HANDLED;
100}
101
102static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
103{
104 struct electra_cf_socket *cf;
105
106 if (!sp)
107 return -EINVAL;
108
109 cf = container_of(s, struct electra_cf_socket, socket);
110
111
112 if (electra_cf_present(cf)) {
113 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
114
115 s->pci_irq = cf->irq;
116 } else
117 *sp = 0;
118 return 0;
119}
120
121static int electra_cf_set_socket(struct pcmcia_socket *sock,
122 struct socket_state_t *s)
123{
124 unsigned int gpio;
125 unsigned int vcc;
126 struct electra_cf_socket *cf;
127
128 cf = container_of(sock, struct electra_cf_socket, socket);
129
130
131 vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
132
133 switch (vcc) {
134 case 0:
135 gpio = 0;
136 break;
137 case 33:
138 gpio = (1 << cf->gpio_3v);
139 break;
140 case 5:
141 gpio = (1 << cf->gpio_5v);
142 break;
143 default:
144 return -EINVAL;
145 }
146
147 gpio |= 1 << (cf->gpio_3v + 16);
148 gpio |= 1 << (cf->gpio_5v + 16);
149 out_le32(cf->gpio_base+0x90, gpio);
150
151 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
152 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
153
154 return 0;
155}
156
157static int electra_cf_set_io_map(struct pcmcia_socket *s,
158 struct pccard_io_map *io)
159{
160 return 0;
161}
162
163static int electra_cf_set_mem_map(struct pcmcia_socket *s,
164 struct pccard_mem_map *map)
165{
166 struct electra_cf_socket *cf;
167
168 if (map->card_start)
169 return -EINVAL;
170 cf = container_of(s, struct electra_cf_socket, socket);
171 map->static_start = cf->mem_phys;
172 map->flags &= MAP_ACTIVE|MAP_ATTRIB;
173 if (!(map->flags & MAP_ATTRIB))
174 map->static_start += 0x800;
175 return 0;
176}
177
178static struct pccard_operations electra_cf_ops = {
179 .init = electra_cf_ss_init,
180 .get_status = electra_cf_get_status,
181 .set_socket = electra_cf_set_socket,
182 .set_io_map = electra_cf_set_io_map,
183 .set_mem_map = electra_cf_set_mem_map,
184};
185
186static int electra_cf_probe(struct platform_device *ofdev)
187{
188 struct device *device = &ofdev->dev;
189 struct device_node *np = ofdev->dev.of_node;
190 struct electra_cf_socket *cf;
191 struct resource mem, io;
192 int status;
193 const unsigned int *prop;
194 int err;
195 struct vm_struct *area;
196
197 err = of_address_to_resource(np, 0, &mem);
198 if (err)
199 return -EINVAL;
200
201 err = of_address_to_resource(np, 1, &io);
202 if (err)
203 return -EINVAL;
204
205 cf = kzalloc(sizeof *cf, GFP_KERNEL);
206 if (!cf)
207 return -ENOMEM;
208
209 setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf);
210 cf->irq = NO_IRQ;
211
212 cf->ofdev = ofdev;
213 cf->mem_phys = mem.start;
214 cf->mem_size = PAGE_ALIGN(resource_size(&mem));
215 cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
216 cf->io_size = PAGE_ALIGN(resource_size(&io));
217
218 area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
219 if (area == NULL)
220 return -ENOMEM;
221
222 cf->io_virt = (void __iomem *)(area->addr);
223
224 cf->gpio_base = ioremap(0xfc103000, 0x1000);
225 dev_set_drvdata(device, cf);
226
227 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
228 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
229 _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) {
230 dev_err(device, "can't ioremap ranges\n");
231 status = -ENOMEM;
232 goto fail1;
233 }
234
235
236 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
237
238 cf->iomem.start = (unsigned long)cf->mem_base;
239 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
240 cf->iomem.flags = IORESOURCE_MEM;
241
242 cf->irq = irq_of_parse_and_map(np, 0);
243
244 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
245 driver_name, cf);
246 if (status < 0) {
247 dev_err(device, "request_irq failed\n");
248 goto fail1;
249 }
250
251 cf->socket.pci_irq = cf->irq;
252
253 prop = of_get_property(np, "card-detect-gpio", NULL);
254 if (!prop)
255 goto fail1;
256 cf->gpio_detect = *prop;
257
258 prop = of_get_property(np, "card-vsense-gpio", NULL);
259 if (!prop)
260 goto fail1;
261 cf->gpio_vsense = *prop;
262
263 prop = of_get_property(np, "card-3v-gpio", NULL);
264 if (!prop)
265 goto fail1;
266 cf->gpio_3v = *prop;
267
268 prop = of_get_property(np, "card-5v-gpio", NULL);
269 if (!prop)
270 goto fail1;
271 cf->gpio_5v = *prop;
272
273 cf->socket.io_offset = cf->io_base;
274
275
276 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
277 status = -ENXIO;
278 dev_err(device, "Can't claim memory region\n");
279 goto fail1;
280 }
281
282 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
283 status = -ENXIO;
284 dev_err(device, "Can't claim I/O region\n");
285 goto fail2;
286 }
287
288 cf->socket.owner = THIS_MODULE;
289 cf->socket.dev.parent = &ofdev->dev;
290 cf->socket.ops = &electra_cf_ops;
291 cf->socket.resource_ops = &pccard_static_ops;
292 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
293 SS_CAP_MEM_ALIGN;
294 cf->socket.map_size = 0x800;
295
296 status = pcmcia_register_socket(&cf->socket);
297 if (status < 0) {
298 dev_err(device, "pcmcia_register_socket failed\n");
299 goto fail3;
300 }
301
302 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
303 cf->mem_phys, io.start, cf->irq);
304
305 cf->active = 1;
306 electra_cf_timer((unsigned long)cf);
307 return 0;
308
309fail3:
310 release_region(cf->io_base, cf->io_size);
311fail2:
312 release_mem_region(cf->mem_phys, cf->mem_size);
313fail1:
314 if (cf->irq != NO_IRQ)
315 free_irq(cf->irq, cf);
316
317 if (cf->io_virt)
318 __iounmap_at(cf->io_virt, cf->io_size);
319 if (cf->mem_base)
320 iounmap(cf->mem_base);
321 if (cf->gpio_base)
322 iounmap(cf->gpio_base);
323 device_init_wakeup(&ofdev->dev, 0);
324 kfree(cf);
325 return status;
326
327}
328
329static int electra_cf_remove(struct platform_device *ofdev)
330{
331 struct device *device = &ofdev->dev;
332 struct electra_cf_socket *cf;
333
334 cf = dev_get_drvdata(device);
335
336 cf->active = 0;
337 pcmcia_unregister_socket(&cf->socket);
338 free_irq(cf->irq, cf);
339 del_timer_sync(&cf->timer);
340
341 __iounmap_at(cf->io_virt, cf->io_size);
342 iounmap(cf->mem_base);
343 iounmap(cf->gpio_base);
344 release_mem_region(cf->mem_phys, cf->mem_size);
345 release_region(cf->io_base, cf->io_size);
346
347 kfree(cf);
348
349 return 0;
350}
351
352static const struct of_device_id electra_cf_match[] = {
353 {
354 .compatible = "electra-cf",
355 },
356 {},
357};
358MODULE_DEVICE_TABLE(of, electra_cf_match);
359
360static struct platform_driver electra_cf_driver = {
361 .driver = {
362 .name = driver_name,
363 .of_match_table = electra_cf_match,
364 },
365 .probe = electra_cf_probe,
366 .remove = electra_cf_remove,
367};
368
369module_platform_driver(electra_cf_driver);
370
371MODULE_LICENSE("GPL");
372MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
373MODULE_DESCRIPTION("PA Semi Electra CF driver");
374
