aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-s3c64xx/gpiolib.c
blob: fd99a82e82c486e13a92f5d2ec35570b326db08d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/* arch/arm/plat-s3c64xx/gpiolib.c
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2008 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 *      http://armlinux.simtec.co.uk/
 *
 * S3C64XX - GPIOlib support 
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>

#include <mach/map.h>

#include <plat/gpio-core.h>
#include <plat/gpio-cfg.h>
#include <plat/gpio-cfg-helpers.h>
#include <mach/regs-gpio.h>

/* GPIO bank summary:
 *
 * Bank	GPIOs	Style	SlpCon	ExtInt Group
 * A	8	4Bit	Yes	1
 * B	7	4Bit	Yes	1
 * C	8	4Bit	Yes	2
 * D	5	4Bit	Yes	3
 * E	5	4Bit	Yes	None
 * F	16	2Bit	Yes	4 [1]
 * G	7	4Bit	Yes	5
 * H	10	4Bit[2]	Yes	6
 * I	16	2Bit	Yes	None
 * J	12	2Bit	Yes	None
 * K	16	4Bit[2]	No	None
 * L	15	4Bit[2] No	None
 * M	6	4Bit	No	IRQ_EINT
 * N	16	2Bit	No	IRQ_EINT
 * O	16	2Bit	Yes	7
 * P	15	2Bit	Yes	8
 * Q	9	2Bit	Yes	9
 *
 * [1] BANKF pins 14,15 do not form part of the external interrupt sources
 * [2] BANK has two control registers, GPxCON0 and GPxCON1
 */

static struct s3c_gpio_cfg gpio_4bit_cfg_noint = {
	.set_config	= s3c_gpio_setcfg_s3c64xx_4bit,
	.get_config	= s3c_gpio_getcfg_s3c64xx_4bit,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

static struct s3c_gpio_cfg gpio_4bit_cfg_eint0111 = {
	.cfg_eint	= 7,
	.set_config	= s3c_gpio_setcfg_s3c64xx_4bit,
	.get_config	= s3c_gpio_getcfg_s3c64xx_4bit,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

static struct s3c_gpio_cfg gpio_4bit_cfg_eint0011 = {
	.cfg_eint	= 3,
	.get_config	= s3c_gpio_getcfg_s3c64xx_4bit,
	.set_config	= s3c_gpio_setcfg_s3c64xx_4bit,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

int s3c64xx_gpio2int_gpm(struct gpio_chip *chip, unsigned pin)
{
	return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO;
}

static struct s3c_gpio_chip gpio_4bit[] = {
	{
		.base	= S3C64XX_GPA_BASE,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPA(0),
			.ngpio	= S3C64XX_GPIO_A_NR,
			.label	= "GPA",
		},
	}, {
		.base	= S3C64XX_GPB_BASE,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPB(0),
			.ngpio	= S3C64XX_GPIO_B_NR,
			.label	= "GPB",
		},
	}, {
		.base	= S3C64XX_GPC_BASE,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPC(0),
			.ngpio	= S3C64XX_GPIO_C_NR,
			.label	= "GPC",
		},
	}, {
		.base	= S3C64XX_GPD_BASE,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPD(0),
			.ngpio	= S3C64XX_GPIO_D_NR,
			.label	= "GPD",
		},
	}, {
		.base	= S3C64XX_GPE_BASE,
		.config	= &gpio_4bit_cfg_noint,
		.chip	= {
			.base	= S3C64XX_GPE(0),
			.ngpio	= S3C64XX_GPIO_E_NR,
			.label	= "GPE",
		},
	}, {
		.base	= S3C64XX_GPG_BASE,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPG(0),
			.ngpio	= S3C64XX_GPIO_G_NR,
			.label	= "GPG",
		},
	}, {
		.base	= S3C64XX_GPM_BASE,
		.config	= &gpio_4bit_cfg_eint0011,
		.chip	= {
			.base	= S3C64XX_GPM(0),
			.ngpio	= S3C64XX_GPIO_M_NR,
			.label	= "GPM",
			.to_irq = s3c64xx_gpio2int_gpm,
		},
	},
};

int s3c64xx_gpio2int_gpl(struct gpio_chip *chip, unsigned pin)
{
	return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO;
}

static struct s3c_gpio_chip gpio_4bit2[] = {
	{
		.base	= S3C64XX_GPH_BASE + 0x4,
		.config	= &gpio_4bit_cfg_eint0111,
		.chip	= {
			.base	= S3C64XX_GPH(0),
			.ngpio	= S3C64XX_GPIO_H_NR,
			.label	= "GPH",
		},
	}, {
		.base	= S3C64XX_GPK_BASE + 0x4,
		.config	= &gpio_4bit_cfg_noint,
		.chip	= {
			.base	= S3C64XX_GPK(0),
			.ngpio	= S3C64XX_GPIO_K_NR,
			.label	= "GPK",
		},
	}, {
		.base	= S3C64XX_GPL_BASE + 0x4,
		.config	= &gpio_4bit_cfg_eint0011,
		.chip	= {
			.base	= S3C64XX_GPL(0),
			.ngpio	= S3C64XX_GPIO_L_NR,
			.label	= "GPL",
			.to_irq = s3c64xx_gpio2int_gpl,
		},
	},
};

static struct s3c_gpio_cfg gpio_2bit_cfg_noint = {
	.set_config	= s3c_gpio_setcfg_s3c24xx,
	.get_config	= s3c_gpio_getcfg_s3c24xx,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

static struct s3c_gpio_cfg gpio_2bit_cfg_eint10 = {
	.cfg_eint	= 2,
	.set_config	= s3c_gpio_setcfg_s3c24xx,
	.get_config	= s3c_gpio_getcfg_s3c24xx,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

static struct s3c_gpio_cfg gpio_2bit_cfg_eint11 = {
	.cfg_eint	= 3,
	.set_config	= s3c_gpio_setcfg_s3c24xx,
	.get_config	= s3c_gpio_getcfg_s3c24xx,
	.set_pull	= s3c_gpio_setpull_updown,
	.get_pull	= s3c_gpio_getpull_updown,
};

static struct s3c_gpio_chip gpio_2bit[] = {
	{
		.base	= S3C64XX_GPF_BASE,
		.config	= &gpio_2bit_cfg_eint11,
		.chip	= {
			.base	= S3C64XX_GPF(0),
			.ngpio	= S3C64XX_GPIO_F_NR,
			.label	= "GPF",
		},
	}, {
		.base	= S3C64XX_GPI_BASE,
		.config	= &gpio_2bit_cfg_noint,
		.chip	= {
			.base	= S3C64XX_GPI(0),
			.ngpio	= S3C64XX_GPIO_I_NR,
			.label	= "GPI",
		},
	}, {
		.base	= S3C64XX_GPJ_BASE,
		.config	= &gpio_2bit_cfg_noint,
		.chip	= {
			.base	= S3C64XX_GPJ(0),
			.ngpio	= S3C64XX_GPIO_J_NR,
			.label	= "GPJ",
		},
	}, {
		.base	= S3C64XX_GPN_BASE,
		.irq_base = IRQ_EINT(0),
		.config	= &gpio_2bit_cfg_eint10,
		.chip	= {
			.base	= S3C64XX_GPN(0),
			.ngpio	= S3C64XX_GPIO_N_NR,
			.label	= "GPN",
			.to_irq = samsung_gpiolib_to_irq,
		},
	}, {
		.base	= S3C64XX_GPO_BASE,
		.config	= &gpio_2bit_cfg_eint11,
		.chip	= {
			.base	= S3C64XX_GPO(0),
			.ngpio	= S3C64XX_GPIO_O_NR,
			.label	= "GPO",
		},
	}, {
		.base	= S3C64XX_GPP_BASE,
		.config	= &gpio_2bit_cfg_eint11,
		.chip	= {
			.base	= S3C64XX_GPP(0),
			.ngpio	= S3C64XX_GPIO_P_NR,
			.label	= "GPP",
		},
	}, {
		.base	= S3C64XX_GPQ_BASE,
		.config	= &gpio_2bit_cfg_eint11,
		.chip	= {
			.base	= S3C64XX_GPQ(0),
			.ngpio	= S3C64XX_GPIO_Q_NR,
			.label	= "GPQ",
		},
	},
};

static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
{
	chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
}

static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
				       int nr_chips,
				       void (*fn)(struct s3c_gpio_chip *))
{
	for (; nr_chips > 0; nr_chips--, chips++) {
		if (fn)
			(fn)(chips);
		s3c_gpiolib_add(chips);
	}
}

static __init int s3c64xx_gpiolib_init(void)
{
	s3c64xx_gpiolib_add(gpio_4bit, ARRAY_SIZE(gpio_4bit),
			    samsung_gpiolib_add_4bit);

	s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
			    samsung_gpiolib_add_4bit2);

	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
			    s3c64xx_gpiolib_add_2bit);

	return 0;
}

core_initcall(s3c64xx_gpiolib_init);