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The discovered bit in PGCCSR register indicates if the device has been
[linux-2.6/next.git] / drivers / gpio / gpio-s5pc100.c
blob7f87b0c76e0bcca132f689b03bfe16a0fd7a396c
1 /*
2 * S5PC100 - GPIOlib support
3 *
4 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
6 *
7 * Copyright 2009 Samsung Electronics Co
8 * Kyungmin Park <kyungmin.park@samsung.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/irq.h>
17 #include <linux/io.h>
18 #include <linux/gpio.h>
19
20 #include <mach/map.h>
21 #include <mach/regs-gpio.h>
22
23 #include <plat/gpio-core.h>
24 #include <plat/gpio-cfg.h>
25 #include <plat/gpio-cfg-helpers.h>
26
27 /* S5PC100 GPIO bank summary:
28 *
29 * Bank GPIOs Style INT Type
30 * A0 8 4Bit GPIO_INT0
31 * A1 5 4Bit GPIO_INT1
32 * B 8 4Bit GPIO_INT2
33 * C 5 4Bit GPIO_INT3
34 * D 7 4Bit GPIO_INT4
35 * E0 8 4Bit GPIO_INT5
36 * E1 6 4Bit GPIO_INT6
37 * F0 8 4Bit GPIO_INT7
38 * F1 8 4Bit GPIO_INT8
39 * F2 8 4Bit GPIO_INT9
40 * F3 4 4Bit GPIO_INT10
41 * G0 8 4Bit GPIO_INT11
42 * G1 3 4Bit GPIO_INT12
43 * G2 7 4Bit GPIO_INT13
44 * G3 7 4Bit GPIO_INT14
45 * H0 8 4Bit WKUP_INT
46 * H1 8 4Bit WKUP_INT
47 * H2 8 4Bit WKUP_INT
48 * H3 8 4Bit WKUP_INT
49 * I 8 4Bit GPIO_INT15
50 * J0 8 4Bit GPIO_INT16
51 * J1 5 4Bit GPIO_INT17
52 * J2 8 4Bit GPIO_INT18
53 * J3 8 4Bit GPIO_INT19
54 * J4 4 4Bit GPIO_INT20
55 * K0 8 4Bit None
56 * K1 6 4Bit None
57 * K2 8 4Bit None
58 * K3 8 4Bit None
59 * L0 8 4Bit None
60 * L1 8 4Bit None
61 * L2 8 4Bit None
62 * L3 8 4Bit None
63 */
64
65 static struct s3c_gpio_cfg gpio_cfg = {
66 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
67 .set_pull = s3c_gpio_setpull_updown,
68 .get_pull = s3c_gpio_getpull_updown,
69 };
70
71 static struct s3c_gpio_cfg gpio_cfg_eint = {
72 .cfg_eint = 0xf,
73 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
74 .set_pull = s3c_gpio_setpull_updown,
75 .get_pull = s3c_gpio_getpull_updown,
76 };
77
78 static struct s3c_gpio_cfg gpio_cfg_noint = {
79 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
80 .set_pull = s3c_gpio_setpull_updown,
81 .get_pull = s3c_gpio_getpull_updown,
82 };
83
84 /*
85 * GPIO bank's base address given the index of the bank in the
86 * list of all gpio banks.
87 */
88 #define S5PC100_BANK_BASE(bank_nr) (S5P_VA_GPIO + ((bank_nr) * 0x20))
89
90 /*
91 * Following are the gpio banks in S5PC100.
92 *
93 * The 'config' member when left to NULL, is initialized to the default
94 * structure gpio_cfg in the init function below.
95 *
96 * The 'base' member is also initialized in the init function below.
97 * Note: The initialization of 'base' member of s3c_gpio_chip structure
98 * uses the above macro and depends on the banks being listed in order here.
99 */
100 static struct s3c_gpio_chip s5pc100_gpio_chips[] = {
101 {
102 .chip = {
103 .base = S5PC100_GPA0(0),
104 .ngpio = S5PC100_GPIO_A0_NR,
105 .label = "GPA0",
106 },
107 }, {
108 .chip = {
109 .base = S5PC100_GPA1(0),
110 .ngpio = S5PC100_GPIO_A1_NR,
111 .label = "GPA1",
112 },
113 }, {
114 .chip = {
115 .base = S5PC100_GPB(0),
116 .ngpio = S5PC100_GPIO_B_NR,
117 .label = "GPB",
118 },
119 }, {
120 .chip = {
121 .base = S5PC100_GPC(0),
122 .ngpio = S5PC100_GPIO_C_NR,
123 .label = "GPC",
124 },
125 }, {
126 .chip = {
127 .base = S5PC100_GPD(0),
128 .ngpio = S5PC100_GPIO_D_NR,
129 .label = "GPD",
130 },
131 }, {
132 .chip = {
133 .base = S5PC100_GPE0(0),
134 .ngpio = S5PC100_GPIO_E0_NR,
135 .label = "GPE0",
136 },
137 }, {
138 .chip = {
139 .base = S5PC100_GPE1(0),
140 .ngpio = S5PC100_GPIO_E1_NR,
141 .label = "GPE1",
142 },
143 }, {
144 .chip = {
145 .base = S5PC100_GPF0(0),
146 .ngpio = S5PC100_GPIO_F0_NR,
147 .label = "GPF0",
148 },
149 }, {
150 .chip = {
151 .base = S5PC100_GPF1(0),
152 .ngpio = S5PC100_GPIO_F1_NR,
153 .label = "GPF1",
154 },
155 }, {
156 .chip = {
157 .base = S5PC100_GPF2(0),
158 .ngpio = S5PC100_GPIO_F2_NR,
159 .label = "GPF2",
160 },
161 }, {
162 .chip = {
163 .base = S5PC100_GPF3(0),
164 .ngpio = S5PC100_GPIO_F3_NR,
165 .label = "GPF3",
166 },
167 }, {
168 .chip = {
169 .base = S5PC100_GPG0(0),
170 .ngpio = S5PC100_GPIO_G0_NR,
171 .label = "GPG0",
172 },
173 }, {
174 .chip = {
175 .base = S5PC100_GPG1(0),
176 .ngpio = S5PC100_GPIO_G1_NR,
177 .label = "GPG1",
178 },
179 }, {
180 .chip = {
181 .base = S5PC100_GPG2(0),
182 .ngpio = S5PC100_GPIO_G2_NR,
183 .label = "GPG2",
184 },
185 }, {
186 .chip = {
187 .base = S5PC100_GPG3(0),
188 .ngpio = S5PC100_GPIO_G3_NR,
189 .label = "GPG3",
190 },
191 }, {
192 .chip = {
193 .base = S5PC100_GPI(0),
194 .ngpio = S5PC100_GPIO_I_NR,
195 .label = "GPI",
196 },
197 }, {
198 .chip = {
199 .base = S5PC100_GPJ0(0),
200 .ngpio = S5PC100_GPIO_J0_NR,
201 .label = "GPJ0",
202 },
203 }, {
204 .chip = {
205 .base = S5PC100_GPJ1(0),
206 .ngpio = S5PC100_GPIO_J1_NR,
207 .label = "GPJ1",
208 },
209 }, {
210 .chip = {
211 .base = S5PC100_GPJ2(0),
212 .ngpio = S5PC100_GPIO_J2_NR,
213 .label = "GPJ2",
214 },
215 }, {
216 .chip = {
217 .base = S5PC100_GPJ3(0),
218 .ngpio = S5PC100_GPIO_J3_NR,
219 .label = "GPJ3",
220 },
221 }, {
222 .chip = {
223 .base = S5PC100_GPJ4(0),
224 .ngpio = S5PC100_GPIO_J4_NR,
225 .label = "GPJ4",
226 },
227 }, {
228 .config = &gpio_cfg_noint,
229 .chip = {
230 .base = S5PC100_GPK0(0),
231 .ngpio = S5PC100_GPIO_K0_NR,
232 .label = "GPK0",
233 },
234 }, {
235 .config = &gpio_cfg_noint,
236 .chip = {
237 .base = S5PC100_GPK1(0),
238 .ngpio = S5PC100_GPIO_K1_NR,
239 .label = "GPK1",
240 },
241 }, {
242 .config = &gpio_cfg_noint,
243 .chip = {
244 .base = S5PC100_GPK2(0),
245 .ngpio = S5PC100_GPIO_K2_NR,
246 .label = "GPK2",
247 },
248 }, {
249 .config = &gpio_cfg_noint,
250 .chip = {
251 .base = S5PC100_GPK3(0),
252 .ngpio = S5PC100_GPIO_K3_NR,
253 .label = "GPK3",
254 },
255 }, {
256 .config = &gpio_cfg_noint,
257 .chip = {
258 .base = S5PC100_GPL0(0),
259 .ngpio = S5PC100_GPIO_L0_NR,
260 .label = "GPL0",
261 },
262 }, {
263 .config = &gpio_cfg_noint,
264 .chip = {
265 .base = S5PC100_GPL1(0),
266 .ngpio = S5PC100_GPIO_L1_NR,
267 .label = "GPL1",
268 },
269 }, {
270 .config = &gpio_cfg_noint,
271 .chip = {
272 .base = S5PC100_GPL2(0),
273 .ngpio = S5PC100_GPIO_L2_NR,
274 .label = "GPL2",
275 },
276 }, {
277 .config = &gpio_cfg_noint,
278 .chip = {
279 .base = S5PC100_GPL3(0),
280 .ngpio = S5PC100_GPIO_L3_NR,
281 .label = "GPL3",
282 },
283 }, {
284 .config = &gpio_cfg_noint,
285 .chip = {
286 .base = S5PC100_GPL4(0),
287 .ngpio = S5PC100_GPIO_L4_NR,
288 .label = "GPL4",
289 },
290 }, {
291 .base = (S5P_VA_GPIO + 0xC00),
292 .config = &gpio_cfg_eint,
293 .irq_base = IRQ_EINT(0),
294 .chip = {
295 .base = S5PC100_GPH0(0),
296 .ngpio = S5PC100_GPIO_H0_NR,
297 .label = "GPH0",
298 .to_irq = samsung_gpiolib_to_irq,
299 },
300 }, {
301 .base = (S5P_VA_GPIO + 0xC20),
302 .config = &gpio_cfg_eint,
303 .irq_base = IRQ_EINT(8),
304 .chip = {
305 .base = S5PC100_GPH1(0),
306 .ngpio = S5PC100_GPIO_H1_NR,
307 .label = "GPH1",
308 .to_irq = samsung_gpiolib_to_irq,
309 },
310 }, {
311 .base = (S5P_VA_GPIO + 0xC40),
312 .config = &gpio_cfg_eint,
313 .irq_base = IRQ_EINT(16),
314 .chip = {
315 .base = S5PC100_GPH2(0),
316 .ngpio = S5PC100_GPIO_H2_NR,
317 .label = "GPH2",
318 .to_irq = samsung_gpiolib_to_irq,
319 },
320 }, {
321 .base = (S5P_VA_GPIO + 0xC60),
322 .config = &gpio_cfg_eint,
323 .irq_base = IRQ_EINT(24),
324 .chip = {
325 .base = S5PC100_GPH3(0),
326 .ngpio = S5PC100_GPIO_H3_NR,
327 .label = "GPH3",
328 .to_irq = samsung_gpiolib_to_irq,
329 },
330 },
331 };
332
333 static __init int s5pc100_gpiolib_init(void)
334 {
335 struct s3c_gpio_chip *chip = s5pc100_gpio_chips;
336 int nr_chips = ARRAY_SIZE(s5pc100_gpio_chips);
337 int gpioint_group = 0;
338 int i;
339
340 for (i = 0; i < nr_chips; i++, chip++) {
341 if (chip->config == NULL) {
342 chip->config = &gpio_cfg;
343 chip->group = gpioint_group++;
344 }
345 if (chip->base == NULL)
346 chip->base = S5PC100_BANK_BASE(i);
347 }
348
349 samsung_gpiolib_add_4bit_chips(s5pc100_gpio_chips, nr_chips);
350 s5p_register_gpioint_bank(IRQ_GPIOINT, 0, S5P_GPIOINT_GROUP_MAXNR);
351
352 return 0;
353 }
354 core_initcall(s5pc100_gpiolib_init);
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