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Linux 3.1-rc1
[linux-kbuild.git] / arch / arm / mach-s3c64xx / gpiolib.c
blob92b09085caaa0e69bd698af7b5a2b61c02427df1
1 /* arch/arm/plat-s3c64xx/gpiolib.c
2 *
3 * Copyright 2008 Openmoko, Inc.
4 * Copyright 2008 Simtec Electronics
5 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/
7 *
8 * S3C64XX - GPIOlib support
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
22 #include <plat/gpio-core.h>
23 #include <plat/gpio-cfg.h>
24 #include <plat/gpio-cfg-helpers.h>
25 #include <mach/regs-gpio.h>
26
27 /* GPIO bank summary:
28 *
29 * Bank GPIOs Style SlpCon ExtInt Group
30 * A 8 4Bit Yes 1
31 * B 7 4Bit Yes 1
32 * C 8 4Bit Yes 2
33 * D 5 4Bit Yes 3
34 * E 5 4Bit Yes None
35 * F 16 2Bit Yes 4 [1]
36 * G 7 4Bit Yes 5
37 * H 10 4Bit[2] Yes 6
38 * I 16 2Bit Yes None
39 * J 12 2Bit Yes None
40 * K 16 4Bit[2] No None
41 * L 15 4Bit[2] No None
42 * M 6 4Bit No IRQ_EINT
43 * N 16 2Bit No IRQ_EINT
44 * O 16 2Bit Yes 7
45 * P 15 2Bit Yes 8
46 * Q 9 2Bit Yes 9
47 *
48 * [1] BANKF pins 14,15 do not form part of the external interrupt sources
49 * [2] BANK has two control registers, GPxCON0 and GPxCON1
50 */
51
52 static struct s3c_gpio_cfg gpio_4bit_cfg_noint = {
53 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
54 .get_config = s3c_gpio_getcfg_s3c64xx_4bit,
55 .set_pull = s3c_gpio_setpull_updown,
56 .get_pull = s3c_gpio_getpull_updown,
57 };
58
59 static struct s3c_gpio_cfg gpio_4bit_cfg_eint0111 = {
60 .cfg_eint = 7,
61 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
62 .get_config = s3c_gpio_getcfg_s3c64xx_4bit,
63 .set_pull = s3c_gpio_setpull_updown,
64 .get_pull = s3c_gpio_getpull_updown,
65 };
66
67 static struct s3c_gpio_cfg gpio_4bit_cfg_eint0011 = {
68 .cfg_eint = 3,
69 .get_config = s3c_gpio_getcfg_s3c64xx_4bit,
70 .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
71 .set_pull = s3c_gpio_setpull_updown,
72 .get_pull = s3c_gpio_getpull_updown,
73 };
74
75 static int s3c64xx_gpio2int_gpm(struct gpio_chip *chip, unsigned pin)
76 {
77 return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO;
78 }
79
80 static struct s3c_gpio_chip gpio_4bit[] = {
81 {
82 .base = S3C64XX_GPA_BASE,
83 .config = &gpio_4bit_cfg_eint0111,
84 .chip = {
85 .base = S3C64XX_GPA(0),
86 .ngpio = S3C64XX_GPIO_A_NR,
87 .label = "GPA",
88 },
89 }, {
90 .base = S3C64XX_GPB_BASE,
91 .config = &gpio_4bit_cfg_eint0111,
92 .chip = {
93 .base = S3C64XX_GPB(0),
94 .ngpio = S3C64XX_GPIO_B_NR,
95 .label = "GPB",
96 },
97 }, {
98 .base = S3C64XX_GPC_BASE,
99 .config = &gpio_4bit_cfg_eint0111,
100 .chip = {
101 .base = S3C64XX_GPC(0),
102 .ngpio = S3C64XX_GPIO_C_NR,
103 .label = "GPC",
104 },
105 }, {
106 .base = S3C64XX_GPD_BASE,
107 .config = &gpio_4bit_cfg_eint0111,
108 .chip = {
109 .base = S3C64XX_GPD(0),
110 .ngpio = S3C64XX_GPIO_D_NR,
111 .label = "GPD",
112 },
113 }, {
114 .base = S3C64XX_GPE_BASE,
115 .config = &gpio_4bit_cfg_noint,
116 .chip = {
117 .base = S3C64XX_GPE(0),
118 .ngpio = S3C64XX_GPIO_E_NR,
119 .label = "GPE",
120 },
121 }, {
122 .base = S3C64XX_GPG_BASE,
123 .config = &gpio_4bit_cfg_eint0111,
124 .chip = {
125 .base = S3C64XX_GPG(0),
126 .ngpio = S3C64XX_GPIO_G_NR,
127 .label = "GPG",
128 },
129 }, {
130 .base = S3C64XX_GPM_BASE,
131 .config = &gpio_4bit_cfg_eint0011,
132 .chip = {
133 .base = S3C64XX_GPM(0),
134 .ngpio = S3C64XX_GPIO_M_NR,
135 .label = "GPM",
136 .to_irq = s3c64xx_gpio2int_gpm,
137 },
138 },
139 };
140
141 static int s3c64xx_gpio2int_gpl(struct gpio_chip *chip, unsigned pin)
142 {
143 return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO;
144 }
145
146 static struct s3c_gpio_chip gpio_4bit2[] = {
147 {
148 .base = S3C64XX_GPH_BASE + 0x4,
149 .config = &gpio_4bit_cfg_eint0111,
150 .chip = {
151 .base = S3C64XX_GPH(0),
152 .ngpio = S3C64XX_GPIO_H_NR,
153 .label = "GPH",
154 },
155 }, {
156 .base = S3C64XX_GPK_BASE + 0x4,
157 .config = &gpio_4bit_cfg_noint,
158 .chip = {
159 .base = S3C64XX_GPK(0),
160 .ngpio = S3C64XX_GPIO_K_NR,
161 .label = "GPK",
162 },
163 }, {
164 .base = S3C64XX_GPL_BASE + 0x4,
165 .config = &gpio_4bit_cfg_eint0011,
166 .chip = {
167 .base = S3C64XX_GPL(0),
168 .ngpio = S3C64XX_GPIO_L_NR,
169 .label = "GPL",
170 .to_irq = s3c64xx_gpio2int_gpl,
171 },
172 },
173 };
174
175 static struct s3c_gpio_cfg gpio_2bit_cfg_noint = {
176 .set_config = s3c_gpio_setcfg_s3c24xx,
177 .get_config = s3c_gpio_getcfg_s3c24xx,
178 .set_pull = s3c_gpio_setpull_updown,
179 .get_pull = s3c_gpio_getpull_updown,
180 };
181
182 static struct s3c_gpio_cfg gpio_2bit_cfg_eint10 = {
183 .cfg_eint = 2,
184 .set_config = s3c_gpio_setcfg_s3c24xx,
185 .get_config = s3c_gpio_getcfg_s3c24xx,
186 .set_pull = s3c_gpio_setpull_updown,
187 .get_pull = s3c_gpio_getpull_updown,
188 };
189
190 static struct s3c_gpio_cfg gpio_2bit_cfg_eint11 = {
191 .cfg_eint = 3,
192 .set_config = s3c_gpio_setcfg_s3c24xx,
193 .get_config = s3c_gpio_getcfg_s3c24xx,
194 .set_pull = s3c_gpio_setpull_updown,
195 .get_pull = s3c_gpio_getpull_updown,
196 };
197
198 static struct s3c_gpio_chip gpio_2bit[] = {
199 {
200 .base = S3C64XX_GPF_BASE,
201 .config = &gpio_2bit_cfg_eint11,
202 .chip = {
203 .base = S3C64XX_GPF(0),
204 .ngpio = S3C64XX_GPIO_F_NR,
205 .label = "GPF",
206 },
207 }, {
208 .base = S3C64XX_GPI_BASE,
209 .config = &gpio_2bit_cfg_noint,
210 .chip = {
211 .base = S3C64XX_GPI(0),
212 .ngpio = S3C64XX_GPIO_I_NR,
213 .label = "GPI",
214 },
215 }, {
216 .base = S3C64XX_GPJ_BASE,
217 .config = &gpio_2bit_cfg_noint,
218 .chip = {
219 .base = S3C64XX_GPJ(0),
220 .ngpio = S3C64XX_GPIO_J_NR,
221 .label = "GPJ",
222 },
223 }, {
224 .base = S3C64XX_GPN_BASE,
225 .irq_base = IRQ_EINT(0),
226 .config = &gpio_2bit_cfg_eint10,
227 .chip = {
228 .base = S3C64XX_GPN(0),
229 .ngpio = S3C64XX_GPIO_N_NR,
230 .label = "GPN",
231 .to_irq = samsung_gpiolib_to_irq,
232 },
233 }, {
234 .base = S3C64XX_GPO_BASE,
235 .config = &gpio_2bit_cfg_eint11,
236 .chip = {
237 .base = S3C64XX_GPO(0),
238 .ngpio = S3C64XX_GPIO_O_NR,
239 .label = "GPO",
240 },
241 }, {
242 .base = S3C64XX_GPP_BASE,
243 .config = &gpio_2bit_cfg_eint11,
244 .chip = {
245 .base = S3C64XX_GPP(0),
246 .ngpio = S3C64XX_GPIO_P_NR,
247 .label = "GPP",
248 },
249 }, {
250 .base = S3C64XX_GPQ_BASE,
251 .config = &gpio_2bit_cfg_eint11,
252 .chip = {
253 .base = S3C64XX_GPQ(0),
254 .ngpio = S3C64XX_GPIO_Q_NR,
255 .label = "GPQ",
256 },
257 },
258 };
259
260 static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
261 {
262 chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
263 }
264
265 static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
266 int nr_chips,
267 void (*fn)(struct s3c_gpio_chip *))
268 {
269 for (; nr_chips > 0; nr_chips--, chips++) {
270 if (fn)
271 (fn)(chips);
272 s3c_gpiolib_add(chips);
273 }
274 }
275
276 static __init int s3c64xx_gpiolib_init(void)
277 {
278 s3c64xx_gpiolib_add(gpio_4bit, ARRAY_SIZE(gpio_4bit),
279 samsung_gpiolib_add_4bit);
280
281 s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
282 samsung_gpiolib_add_4bit2);
283
284 s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
285 s3c64xx_gpiolib_add_2bit);
286
287 return 0;
288 }
289
290 core_initcall(s3c64xx_gpiolib_init);
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