1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16#include <linux/module.h>
17#include <linux/kernel.h>
18#include <linux/init.h>
19#include <linux/sysdev.h>
20
21#include <mach/gpio.h>
22#include <mach/pxa2xx-regs.h>
23#include <mach/mfp-pxa2xx.h>
24
25#include "generic.h"
26
27#define PGSR(x) __REG2(0x40F00020, (x) << 2)
28#define __GAFR(u, x) __REG2((u) ? 0x40E00058 : 0x40E00054, (x) << 3)
29#define GAFR_L(x) __GAFR(0, x)
30#define GAFR_U(x) __GAFR(1, x)
31
32#define PWER_WE35 (1 << 24)
33
34struct gpio_desc {
35 unsigned valid : 1;
36 unsigned can_wakeup : 1;
37 unsigned keypad_gpio : 1;
38 unsigned dir_inverted : 1;
39 unsigned int mask;
40 unsigned int mux_mask;
41 unsigned long config;
42};
43
44static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];
45
46static unsigned long gpdr_lpm[4];
47
48static int __mfp_config_gpio(unsigned gpio, unsigned long c)
49{
50 unsigned long gafr, mask = GPIO_bit(gpio);
51 int bank = gpio_to_bank(gpio);
52 int uorl = !!(gpio & 0x10);
53 int shft = (gpio & 0xf) << 1;
54 int fn = MFP_AF(c);
55 int is_out = (c & MFP_DIR_OUT) ? 1 : 0;
56
57 if (fn > 3)
58 return -EINVAL;
59
60
61 gafr = (uorl == 0) ? GAFR_L(bank) : GAFR_U(bank);
62 gafr = (gafr & ~(0x3 << shft)) | (fn << shft);
63
64 if (uorl == 0)
65 GAFR_L(bank) = gafr;
66 else
67 GAFR_U(bank) = gafr;
68
69 if (is_out ^ gpio_desc[gpio].dir_inverted)
70 GPDR(gpio) |= mask;
71 else
72 GPDR(gpio) &= ~mask;
73
74
75 switch (c & MFP_LPM_STATE_MASK) {
76 case MFP_LPM_DRIVE_HIGH:
77 PGSR(bank) |= mask;
78 is_out = 1;
79 break;
80 case MFP_LPM_DRIVE_LOW:
81 PGSR(bank) &= ~mask;
82 is_out = 1;
83 break;
84 case MFP_LPM_DEFAULT:
85 break;
86 default:
87
88 pr_warning("%s: GPIO%d: unsupported low power mode\n",
89 __func__, gpio);
90 break;
91 }
92
93 if (is_out ^ gpio_desc[gpio].dir_inverted)
94 gpdr_lpm[bank] |= mask;
95 else
96 gpdr_lpm[bank] &= ~mask;
97
98
99
100
101 if ((c & MFP_LPM_CAN_WAKEUP) && !gpio_desc[gpio].can_wakeup) {
102 pr_warning("%s: GPIO%d unable to wakeup\n",
103 __func__, gpio);
104 return -EINVAL;
105 }
106
107 if ((c & MFP_LPM_CAN_WAKEUP) && is_out) {
108 pr_warning("%s: output GPIO%d unable to wakeup\n",
109 __func__, gpio);
110 return -EINVAL;
111 }
112
113 return 0;
114}
115
116static inline int __mfp_validate(int mfp)
117{
118 int gpio = mfp_to_gpio(mfp);
119
120 if ((mfp > MFP_PIN_GPIO127) || !gpio_desc[gpio].valid) {
121 pr_warning("%s: GPIO%d is invalid pin\n", __func__, gpio);
122 return -1;
123 }
124
125 return gpio;
126}
127
128void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
129{
130 unsigned long flags;
131 unsigned long *c;
132 int i, gpio;
133
134 for (i = 0, c = mfp_cfgs; i < num; i++, c++) {
135
136 gpio = __mfp_validate(MFP_PIN(*c));
137 if (gpio < 0)
138 continue;
139
140 local_irq_save(flags);
141
142 gpio_desc[gpio].config = *c;
143 __mfp_config_gpio(gpio, *c);
144
145 local_irq_restore(flags);
146 }
147}
148
149void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
150{
151 unsigned long flags, c;
152 int gpio;
153
154 gpio = __mfp_validate(mfp);
155 if (gpio < 0)
156 return;
157
158 local_irq_save(flags);
159
160 c = gpio_desc[gpio].config;
161 c = (c & ~MFP_LPM_STATE_MASK) | lpm;
162 __mfp_config_gpio(gpio, c);
163
164 local_irq_restore(flags);
165}
166
167int gpio_set_wake(unsigned int gpio, unsigned int on)
168{
169 struct gpio_desc *d;
170 unsigned long c, mux_taken;
171
172 if (gpio > mfp_to_gpio(MFP_PIN_GPIO127))
173 return -EINVAL;
174
175 d = &gpio_desc[gpio];
176 c = d->config;
177
178 if (!d->valid)
179 return -EINVAL;
180
181 if (d->keypad_gpio)
182 return -EINVAL;
183
184 mux_taken = (PWER & d->mux_mask) & (~d->mask);
185 if (on && mux_taken)
186 return -EBUSY;
187
188 if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {
189 if (on) {
190 PWER = (PWER & ~d->mux_mask) | d->mask;
191
192 if (c & MFP_LPM_EDGE_RISE)
193 PRER |= d->mask;
194 else
195 PRER &= ~d->mask;
196
197 if (c & MFP_LPM_EDGE_FALL)
198 PFER |= d->mask;
199 else
200 PFER &= ~d->mask;
201 } else {
202 PWER &= ~d->mask;
203 PRER &= ~d->mask;
204 PFER &= ~d->mask;
205 }
206 }
207 return 0;
208}
209
210#ifdef CONFIG_PXA25x
211static void __init pxa25x_mfp_init(void)
212{
213 int i;
214
215 for (i = 0; i <= pxa_last_gpio; i++)
216 gpio_desc[i].valid = 1;
217
218 for (i = 0; i <= 15; i++) {
219 gpio_desc[i].can_wakeup = 1;
220 gpio_desc[i].mask = GPIO_bit(i);
221 }
222
223
224
225
226 for (i = 86; i <= pxa_last_gpio; i++)
227 gpio_desc[i].dir_inverted = 1;
228}
229#else
230static inline void pxa25x_mfp_init(void) {}
231#endif
232
233#ifdef CONFIG_PXA27x
234static int pxa27x_pkwr_gpio[] = {
235 13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
236 95, 96, 97, 98, 99, 100, 101, 102
237};
238
239int keypad_set_wake(unsigned int on)
240{
241 unsigned int i, gpio, mask = 0;
242
243 if (!on) {
244 PKWR = 0;
245 return 0;
246 }
247
248 for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
249
250 gpio = pxa27x_pkwr_gpio[i];
251
252 if (gpio_desc[gpio].config & MFP_LPM_CAN_WAKEUP)
253 mask |= gpio_desc[gpio].mask;
254 }
255
256 PKWR = mask;
257 return 0;
258}
259
260#define PWER_WEMUX2_GPIO38 (1 << 16)
261#define PWER_WEMUX2_GPIO53 (2 << 16)
262#define PWER_WEMUX2_GPIO40 (3 << 16)
263#define PWER_WEMUX2_GPIO36 (4 << 16)
264#define PWER_WEMUX2_MASK (7 << 16)
265#define PWER_WEMUX3_GPIO31 (1 << 19)
266#define PWER_WEMUX3_GPIO113 (2 << 19)
267#define PWER_WEMUX3_MASK (3 << 19)
268
269#define INIT_GPIO_DESC_MUXED(mux, gpio) \
270do { \
271 gpio_desc[(gpio)].can_wakeup = 1; \
272 gpio_desc[(gpio)].mask = PWER_ ## mux ## _GPIO ##gpio; \
273 gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK; \
274} while (0)
275
276static void __init pxa27x_mfp_init(void)
277{
278 int i, gpio;
279
280 for (i = 0; i <= pxa_last_gpio; i++) {
281
282
283
284 if (i == 2 || i == 5 || i == 6 || i == 7 || i == 8)
285 continue;
286
287 gpio_desc[i].valid = 1;
288 }
289
290
291 for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
292 gpio = pxa27x_pkwr_gpio[i];
293 gpio_desc[gpio].can_wakeup = 1;
294 gpio_desc[gpio].keypad_gpio = 1;
295 gpio_desc[gpio].mask = 1 << i;
296 }
297
298
299 for (i = 0; i <= 15; i++) {
300
301 if (GPIO_bit(i) & 0x1e4)
302 continue;
303
304 gpio_desc[i].can_wakeup = 1;
305 gpio_desc[i].mask = GPIO_bit(i);
306 }
307
308 gpio_desc[35].can_wakeup = 1;
309 gpio_desc[35].mask = PWER_WE35;
310
311 INIT_GPIO_DESC_MUXED(WEMUX3, 31);
312 INIT_GPIO_DESC_MUXED(WEMUX3, 113);
313 INIT_GPIO_DESC_MUXED(WEMUX2, 38);
314 INIT_GPIO_DESC_MUXED(WEMUX2, 53);
315 INIT_GPIO_DESC_MUXED(WEMUX2, 40);
316 INIT_GPIO_DESC_MUXED(WEMUX2, 36);
317}
318#else
319static inline void pxa27x_mfp_init(void) {}
320#endif
321
322#ifdef CONFIG_PM
323static unsigned long saved_gafr[2][4];
324static unsigned long saved_gpdr[4];
325static unsigned long saved_pgsr[4];
326
327static int pxa2xx_mfp_suspend(struct sys_device *d, pm_message_t state)
328{
329 int i;
330
331 for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
332
333 saved_gafr[0][i] = GAFR_L(i);
334 saved_gafr[1][i] = GAFR_U(i);
335 saved_gpdr[i] = GPDR(i * 32);
336 saved_pgsr[i] = PGSR(i);
337
338 GPDR(i * 32) = gpdr_lpm[i];
339 }
340 return 0;
341}
342
343static int pxa2xx_mfp_resume(struct sys_device *d)
344{
345 int i;
346
347 for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
348 GAFR_L(i) = saved_gafr[0][i];
349 GAFR_U(i) = saved_gafr[1][i];
350 GPDR(i * 32) = saved_gpdr[i];
351 PGSR(i) = saved_pgsr[i];
352 }
353 PSSR = PSSR_RDH | PSSR_PH;
354 return 0;
355}
356#else
357#define pxa2xx_mfp_suspend NULL
358#define pxa2xx_mfp_resume NULL
359#endif
360
361struct sysdev_class pxa2xx_mfp_sysclass = {
362 .name = "mfp",
363 .suspend = pxa2xx_mfp_suspend,
364 .resume = pxa2xx_mfp_resume,
365};
366
367static int __init pxa2xx_mfp_init(void)
368{
369 int i;
370
371 if (!cpu_is_pxa2xx())
372 return 0;
373
374 if (cpu_is_pxa25x())
375 pxa25x_mfp_init();
376
377 if (cpu_is_pxa27x())
378 pxa27x_mfp_init();
379
380
381 PSSR = PSSR_RDH;
382
383
384 for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++)
385 gpdr_lpm[i] = GPDR(i * 32);
386
387 return sysdev_class_register(&pxa2xx_mfp_sysclass);
388}
389postcore_initcall(pxa2xx_mfp_init);
390
