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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 = 0;
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 status = -ENOMEM;
221 goto fail1;
222 }
223
224 cf->io_virt = (void __iomem *)(area->addr);
225
226 cf->gpio_base = ioremap(0xfc103000, 0x1000);
227 dev_set_drvdata(device, cf);
228
229 if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
230 (__ioremap_at(io.start, cf->io_virt, cf->io_size,
231 pgprot_val(pgprot_noncached(__pgprot(0)))) == NULL)) {
232 dev_err(device, "can't ioremap ranges\n");
233 status = -ENOMEM;
234 goto fail1;
235 }
236
237
238 cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
239
240 cf->iomem.start = (unsigned long)cf->mem_base;
241 cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
242 cf->iomem.flags = IORESOURCE_MEM;
243
244 cf->irq = irq_of_parse_and_map(np, 0);
245
246 status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
247 driver_name, cf);
248 if (status < 0) {
249 dev_err(device, "request_irq failed\n");
250 goto fail1;
251 }
252
253 cf->socket.pci_irq = cf->irq;
254
255 prop = of_get_property(np, "card-detect-gpio", NULL);
256 if (!prop)
257 goto fail1;
258 cf->gpio_detect = *prop;
259
260 prop = of_get_property(np, "card-vsense-gpio", NULL);
261 if (!prop)
262 goto fail1;
263 cf->gpio_vsense = *prop;
264
265 prop = of_get_property(np, "card-3v-gpio", NULL);
266 if (!prop)
267 goto fail1;
268 cf->gpio_3v = *prop;
269
270 prop = of_get_property(np, "card-5v-gpio", NULL);
271 if (!prop)
272 goto fail1;
273 cf->gpio_5v = *prop;
274
275 cf->socket.io_offset = cf->io_base;
276
277
278 if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
279 status = -ENXIO;
280 dev_err(device, "Can't claim memory region\n");
281 goto fail1;
282 }
283
284 if (!request_region(cf->io_base, cf->io_size, driver_name)) {
285 status = -ENXIO;
286 dev_err(device, "Can't claim I/O region\n");
287 goto fail2;
288 }
289
290 cf->socket.owner = THIS_MODULE;
291 cf->socket.dev.parent = &ofdev->dev;
292 cf->socket.ops = &electra_cf_ops;
293 cf->socket.resource_ops = &pccard_static_ops;
294 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
295 SS_CAP_MEM_ALIGN;
296 cf->socket.map_size = 0x800;
297
298 status = pcmcia_register_socket(&cf->socket);
299 if (status < 0) {
300 dev_err(device, "pcmcia_register_socket failed\n");
301 goto fail3;
302 }
303
304 dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
305 cf->mem_phys, io.start, cf->irq);
306
307 cf->active = 1;
308 electra_cf_timer((unsigned long)cf);
309 return 0;
310
311fail3:
312 release_region(cf->io_base, cf->io_size);
313fail2:
314 release_mem_region(cf->mem_phys, cf->mem_size);
315fail1:
316 if (cf->irq)
317 free_irq(cf->irq, cf);
318
319 if (cf->io_virt)
320 __iounmap_at(cf->io_virt, cf->io_size);
321 if (cf->mem_base)
322 iounmap(cf->mem_base);
323 if (cf->gpio_base)
324 iounmap(cf->gpio_base);
325 if (area)
326 device_init_wakeup(&ofdev->dev, 0);
327 kfree(cf);
328 return status;
329
330}
331
332static int electra_cf_remove(struct platform_device *ofdev)
333{
334 struct device *device = &ofdev->dev;
335 struct electra_cf_socket *cf;
336
337 cf = dev_get_drvdata(device);
338
339 cf->active = 0;
340 pcmcia_unregister_socket(&cf->socket);
341 free_irq(cf->irq, cf);
342 del_timer_sync(&cf->timer);
343
344 __iounmap_at(cf->io_virt, cf->io_size);
345 iounmap(cf->mem_base);
346 iounmap(cf->gpio_base);
347 release_mem_region(cf->mem_phys, cf->mem_size);
348 release_region(cf->io_base, cf->io_size);
349
350 kfree(cf);
351
352 return 0;
353}
354
355static const struct of_device_id electra_cf_match[] = {
356 {
357 .compatible = "electra-cf",
358 },
359 {},
360};
361MODULE_DEVICE_TABLE(of, electra_cf_match);
362
363static struct platform_driver electra_cf_driver = {
364 .driver = {
365 .name = driver_name,
366 .of_match_table = electra_cf_match,
367 },
368 .probe = electra_cf_probe,
369 .remove = electra_cf_remove,
370};
371
372module_platform_driver(electra_cf_driver);
373
374MODULE_LICENSE("GPL");
375MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
376MODULE_DESCRIPTION("PA Semi Electra CF driver");
377
