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12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/platform_device.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18#include <linux/interrupt.h>
19#include <linux/slab.h>
20
21#include <pcmcia/ss.h>
22
23#include <mach/hardware.h>
24#include <asm/io.h>
25#include <asm/sizes.h>
26
27#include <plat/mux.h>
28#include <plat/tc.h>
29
30
31
32
33
34
35
36
37
38
39#define CF_BASE 0xfffe2800
40
41
42#define CF_STATUS (CF_BASE + 0x00)
43# define CF_STATUS_BAD_READ (1 << 2)
44# define CF_STATUS_BAD_WRITE (1 << 1)
45# define CF_STATUS_CARD_DETECT (1 << 0)
46
47
48#define CF_CFG (CF_BASE + 0x02)
49
50
51#define CF_CONTROL (CF_BASE + 0x04)
52# define CF_CONTROL_RESET (1 << 0)
53
54#define omap_cf_present() (!(omap_readw(CF_STATUS) & CF_STATUS_CARD_DETECT))
55
56
57
58static const char driver_name[] = "omap_cf";
59
60struct omap_cf_socket {
61 struct pcmcia_socket socket;
62
63 struct timer_list timer;
64 unsigned present:1;
65 unsigned active:1;
66
67 struct platform_device *pdev;
68 unsigned long phys_cf;
69 u_int irq;
70 struct resource iomem;
71};
72
73#define POLL_INTERVAL (2 * HZ)
74
75
76
77static int omap_cf_ss_init(struct pcmcia_socket *s)
78{
79 return 0;
80}
81
82
83static void omap_cf_timer(unsigned long _cf)
84{
85 struct omap_cf_socket *cf = (void *) _cf;
86 unsigned present = omap_cf_present();
87
88 if (present != cf->present) {
89 cf->present = present;
90 pr_debug("%s: card %s\n", driver_name,
91 present ? "present" : "gone");
92 pcmcia_parse_events(&cf->socket, SS_DETECT);
93 }
94
95 if (cf->active)
96 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
97}
98
99
100
101
102
103static irqreturn_t omap_cf_irq(int irq, void *_cf)
104{
105 omap_cf_timer((unsigned long)_cf);
106 return IRQ_HANDLED;
107}
108
109static int omap_cf_get_status(struct pcmcia_socket *s, u_int *sp)
110{
111 if (!sp)
112 return -EINVAL;
113
114
115 if (omap_cf_present()) {
116 struct omap_cf_socket *cf;
117
118 *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;
119 cf = container_of(s, struct omap_cf_socket, socket);
120 s->pcmcia_irq = 0;
121 s->pci_irq = cf->irq;
122 } else
123 *sp = 0;
124 return 0;
125}
126
127static int
128omap_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
129{
130 u16 control;
131
132
133 switch (s->Vcc) {
134 case 0:
135 case 33:
136 break;
137 default:
138 return -EINVAL;
139 }
140
141 control = omap_readw(CF_CONTROL);
142 if (s->flags & SS_RESET)
143 omap_writew(CF_CONTROL_RESET, CF_CONTROL);
144 else
145 omap_writew(0, CF_CONTROL);
146
147 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
148 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
149
150 return 0;
151}
152
153static int omap_cf_ss_suspend(struct pcmcia_socket *s)
154{
155 pr_debug("%s: %s\n", driver_name, __func__);
156 return omap_cf_set_socket(s, &dead_socket);
157}
158
159
160
161static int
162omap_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
163{
164 struct omap_cf_socket *cf;
165
166 cf = container_of(s, struct omap_cf_socket, socket);
167 io->flags &= MAP_ACTIVE|MAP_ATTRIB|MAP_16BIT;
168 io->start = cf->phys_cf + SZ_4K;
169 io->stop = io->start + SZ_2K - 1;
170 return 0;
171}
172
173static int
174omap_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
175{
176 struct omap_cf_socket *cf;
177
178 if (map->card_start)
179 return -EINVAL;
180 cf = container_of(s, struct omap_cf_socket, socket);
181 map->static_start = cf->phys_cf;
182 map->flags &= MAP_ACTIVE|MAP_ATTRIB|MAP_16BIT;
183 if (map->flags & MAP_ATTRIB)
184 map->static_start += SZ_2K;
185 return 0;
186}
187
188static struct pccard_operations omap_cf_ops = {
189 .init = omap_cf_ss_init,
190 .suspend = omap_cf_ss_suspend,
191 .get_status = omap_cf_get_status,
192 .set_socket = omap_cf_set_socket,
193 .set_io_map = omap_cf_set_io_map,
194 .set_mem_map = omap_cf_set_mem_map,
195};
196
197
198
199
200
201
202
203
204static int __init omap_cf_probe(struct platform_device *pdev)
205{
206 unsigned seg;
207 struct omap_cf_socket *cf;
208 int irq;
209 int status;
210
211 seg = (int) pdev->dev.platform_data;
212 if (seg == 0 || seg > 3)
213 return -ENODEV;
214
215
216 irq = platform_get_irq(pdev, 0);
217 if (irq < 0)
218 return -EINVAL;
219
220 cf = kzalloc(sizeof *cf, GFP_KERNEL);
221 if (!cf)
222 return -ENOMEM;
223 init_timer(&cf->timer);
224 cf->timer.function = omap_cf_timer;
225 cf->timer.data = (unsigned long) cf;
226
227 cf->pdev = pdev;
228 platform_set_drvdata(pdev, cf);
229
230
231 status = request_irq(irq, omap_cf_irq, IRQF_SHARED,
232 driver_name, cf);
233 if (status < 0)
234 goto fail0;
235 cf->irq = irq;
236 cf->socket.pci_irq = irq;
237
238 switch (seg) {
239
240 case 1:
241 cf->phys_cf = OMAP_CS1_PHYS;
242 break;
243 case 2:
244 cf->phys_cf = OMAP_CS2_PHYS;
245 break;
246 case 3:
247 cf->phys_cf = omap_cs3_phys();
248 break;
249 default:
250 goto fail1;
251 }
252 cf->iomem.start = cf->phys_cf;
253 cf->iomem.end = cf->iomem.end + SZ_8K - 1;
254 cf->iomem.flags = IORESOURCE_MEM;
255
256
257 cf->socket.io_offset = (unsigned long)
258 ioremap(cf->phys_cf + SZ_4K, SZ_2K);
259 if (!cf->socket.io_offset)
260 goto fail1;
261
262 if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
263 goto fail1;
264
265
266 omap_cfg_reg(W11_1610_CF_CD1);
267 omap_cfg_reg(P11_1610_CF_CD2);
268 omap_cfg_reg(R11_1610_CF_IOIS16);
269 omap_cfg_reg(V10_1610_CF_IREQ);
270 omap_cfg_reg(W10_1610_CF_RESET);
271
272 omap_writew(~(1 << seg), CF_CFG);
273
274 pr_info("%s: cs%d on irq %d\n", driver_name, seg, irq);
275
276
277
278
279
280 pr_debug("%s: cs%d, previous ccs %08x acs %08x\n", driver_name,
281 seg, omap_readl(EMIFS_CCS(seg)), omap_readl(EMIFS_ACS(seg)));
282 omap_writel(0x0004a1b3, EMIFS_CCS(seg));
283 omap_writel(0x00000000, EMIFS_ACS(seg));
284
285
286
287 pr_debug("%s: sts %04x cfg %04x control %04x %s\n", driver_name,
288 omap_readw(CF_STATUS), omap_readw(CF_CFG),
289 omap_readw(CF_CONTROL),
290 omap_cf_present() ? "present" : "(not present)");
291
292 cf->socket.owner = THIS_MODULE;
293 cf->socket.dev.parent = &pdev->dev;
294 cf->socket.ops = &omap_cf_ops;
295 cf->socket.resource_ops = &pccard_static_ops;
296 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
297 | SS_CAP_MEM_ALIGN;
298 cf->socket.map_size = SZ_2K;
299 cf->socket.io[0].res = &cf->iomem;
300
301 status = pcmcia_register_socket(&cf->socket);
302 if (status < 0)
303 goto fail2;
304
305 cf->active = 1;
306 mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
307 return 0;
308
309fail2:
310 release_mem_region(cf->phys_cf, SZ_8K);
311fail1:
312 if (cf->socket.io_offset)
313 iounmap((void __iomem *) cf->socket.io_offset);
314 free_irq(irq, cf);
315fail0:
316 kfree(cf);
317 return status;
318}
319
320static int __exit omap_cf_remove(struct platform_device *pdev)
321{
322 struct omap_cf_socket *cf = platform_get_drvdata(pdev);
323
324 cf->active = 0;
325 pcmcia_unregister_socket(&cf->socket);
326 del_timer_sync(&cf->timer);
327 iounmap((void __iomem *) cf->socket.io_offset);
328 release_mem_region(cf->phys_cf, SZ_8K);
329 free_irq(cf->irq, cf);
330 kfree(cf);
331 return 0;
332}
333
334static struct platform_driver omap_cf_driver = {
335 .driver = {
336 .name = (char *) driver_name,
337 .owner = THIS_MODULE,
338 },
339 .remove = __exit_p(omap_cf_remove),
340};
341
342static int __init omap_cf_init(void)
343{
344 if (cpu_is_omap16xx())
345 return platform_driver_probe(&omap_cf_driver, omap_cf_probe);
346 return -ENODEV;
347}
348
349static void __exit omap_cf_exit(void)
350{
351 if (cpu_is_omap16xx())
352 platform_driver_unregister(&omap_cf_driver);
353}
354
355module_init(omap_cf_init);
356module_exit(omap_cf_exit);
357
358MODULE_DESCRIPTION("OMAP CF Driver");
359MODULE_LICENSE("GPL");
360MODULE_ALIAS("platform:omap_cf");
361
