eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-pxa/mfp-pxa2xx.c |
| 3 | * |
| 4 | * PXA2xx pin mux configuration support |
| 5 | * |
| 6 | * The GPIOs on PXA2xx can be configured as one of many alternate |
| 7 | * functions, this is by concept samilar to the MFP configuration |
| 8 | * on PXA3xx, what's more important, the low power pin state and |
| 9 | * wakeup detection are also supported by the same framework. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
Russell King | 2f8163b | 2011-07-26 10:53:52 +0100 | [diff] [blame] | 15 | #include <linux/gpio.h> |
Haojian Zhuang | 157d264 | 2011-10-17 20:37:52 +0800 | [diff] [blame] | 16 | #include <linux/gpio-pxa.h> |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/init.h> |
Rob Herring | 23019a7 | 2012-03-20 14:33:19 -0500 | [diff] [blame] | 20 | #include <linux/io.h> |
Rafael J. Wysocki | 2eaa03b | 2011-04-22 22:03:11 +0200 | [diff] [blame] | 21 | #include <linux/syscore_ops.h> |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 22 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 23 | #include <mach/pxa2xx-regs.h> |
| 24 | #include <mach/mfp-pxa2xx.h> |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 25 | |
| 26 | #include "generic.h" |
| 27 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 28 | #define PGSR(x) __REG2(0x40F00020, (x) << 2) |
| 29 | #define __GAFR(u, x) __REG2((u) ? 0x40E00058 : 0x40E00054, (x) << 3) |
| 30 | #define GAFR_L(x) __GAFR(0, x) |
| 31 | #define GAFR_U(x) __GAFR(1, x) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 32 | |
Haojian Zhuang | 157d264 | 2011-10-17 20:37:52 +0800 | [diff] [blame] | 33 | #define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2)) |
| 34 | #define GPLR(x) __REG2(0x40E00000, BANK_OFF((x) >> 5)) |
| 35 | #define GPDR(x) __REG2(0x40E00000, BANK_OFF((x) >> 5) + 0x0c) |
Igor Grinberg | ef7c7c6 | 2012-04-12 15:43:29 +0300 | [diff] [blame] | 36 | #define GPSR(x) __REG2(0x40E00000, BANK_OFF((x) >> 5) + 0x18) |
| 37 | #define GPCR(x) __REG2(0x40E00000, BANK_OFF((x) >> 5) + 0x24) |
Haojian Zhuang | 157d264 | 2011-10-17 20:37:52 +0800 | [diff] [blame] | 38 | |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 39 | #define PWER_WE35 (1 << 24) |
| 40 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 41 | struct gpio_desc { |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 42 | unsigned valid : 1; |
| 43 | unsigned can_wakeup : 1; |
| 44 | unsigned keypad_gpio : 1; |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 45 | unsigned dir_inverted : 1; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 46 | unsigned int mask; /* bit mask in PWER or PKWR */ |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 47 | unsigned int mux_mask; /* bit mask of muxed gpio bits, 0 if no mux */ |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 48 | unsigned long config; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 49 | }; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 50 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 51 | static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1]; |
| 52 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 53 | static unsigned long gpdr_lpm[4]; |
Eric Miao | 566b450 | 2008-06-16 09:47:47 +0800 | [diff] [blame] | 54 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 55 | static int __mfp_config_gpio(unsigned gpio, unsigned long c) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 56 | { |
| 57 | unsigned long gafr, mask = GPIO_bit(gpio); |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 58 | int bank = gpio_to_bank(gpio); |
| 59 | int uorl = !!(gpio & 0x10); /* GAFRx_U or GAFRx_L ? */ |
| 60 | int shft = (gpio & 0xf) << 1; |
| 61 | int fn = MFP_AF(c); |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 62 | int is_out = (c & MFP_DIR_OUT) ? 1 : 0; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 63 | |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 64 | if (fn > 3) |
| 65 | return -EINVAL; |
| 66 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 67 | /* alternate function and direction at run-time */ |
| 68 | gafr = (uorl == 0) ? GAFR_L(bank) : GAFR_U(bank); |
| 69 | gafr = (gafr & ~(0x3 << shft)) | (fn << shft); |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 70 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 71 | if (uorl == 0) |
| 72 | GAFR_L(bank) = gafr; |
| 73 | else |
| 74 | GAFR_U(bank) = gafr; |
| 75 | |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 76 | if (is_out ^ gpio_desc[gpio].dir_inverted) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 77 | GPDR(gpio) |= mask; |
| 78 | else |
| 79 | GPDR(gpio) &= ~mask; |
| 80 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 81 | /* alternate function and direction at low power mode */ |
| 82 | switch (c & MFP_LPM_STATE_MASK) { |
| 83 | case MFP_LPM_DRIVE_HIGH: |
| 84 | PGSR(bank) |= mask; |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 85 | is_out = 1; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 86 | break; |
| 87 | case MFP_LPM_DRIVE_LOW: |
| 88 | PGSR(bank) &= ~mask; |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 89 | is_out = 1; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 90 | break; |
Eric Miao | 1fe8c2b | 2010-04-27 11:14:24 +0800 | [diff] [blame] | 91 | case MFP_LPM_INPUT: |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 92 | case MFP_LPM_DEFAULT: |
| 93 | break; |
| 94 | default: |
| 95 | /* warning and fall through, treat as MFP_LPM_DEFAULT */ |
| 96 | pr_warning("%s: GPIO%d: unsupported low power mode\n", |
| 97 | __func__, gpio); |
| 98 | break; |
| 99 | } |
| 100 | |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 101 | if (is_out ^ gpio_desc[gpio].dir_inverted) |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 102 | gpdr_lpm[bank] |= mask; |
| 103 | else |
| 104 | gpdr_lpm[bank] &= ~mask; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 105 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 106 | /* give early warning if MFP_LPM_CAN_WAKEUP is set on the |
| 107 | * configurations of those pins not able to wakeup |
| 108 | */ |
| 109 | if ((c & MFP_LPM_CAN_WAKEUP) && !gpio_desc[gpio].can_wakeup) { |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 110 | pr_warning("%s: GPIO%d unable to wakeup\n", |
| 111 | __func__, gpio); |
| 112 | return -EINVAL; |
| 113 | } |
| 114 | |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 115 | if ((c & MFP_LPM_CAN_WAKEUP) && is_out) { |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 116 | pr_warning("%s: output GPIO%d unable to wakeup\n", |
| 117 | __func__, gpio); |
| 118 | return -EINVAL; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
Eric Miao | 0fedb0ca | 2008-06-16 09:38:27 +0800 | [diff] [blame] | 124 | static inline int __mfp_validate(int mfp) |
| 125 | { |
| 126 | int gpio = mfp_to_gpio(mfp); |
| 127 | |
| 128 | if ((mfp > MFP_PIN_GPIO127) || !gpio_desc[gpio].valid) { |
| 129 | pr_warning("%s: GPIO%d is invalid pin\n", __func__, gpio); |
| 130 | return -1; |
| 131 | } |
| 132 | |
| 133 | return gpio; |
| 134 | } |
| 135 | |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 136 | void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num) |
| 137 | { |
| 138 | unsigned long flags; |
| 139 | unsigned long *c; |
| 140 | int i, gpio; |
| 141 | |
| 142 | for (i = 0, c = mfp_cfgs; i < num; i++, c++) { |
| 143 | |
Eric Miao | 0fedb0ca | 2008-06-16 09:38:27 +0800 | [diff] [blame] | 144 | gpio = __mfp_validate(MFP_PIN(*c)); |
| 145 | if (gpio < 0) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 146 | continue; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 147 | |
| 148 | local_irq_save(flags); |
| 149 | |
| 150 | gpio_desc[gpio].config = *c; |
| 151 | __mfp_config_gpio(gpio, *c); |
| 152 | |
| 153 | local_irq_restore(flags); |
| 154 | } |
| 155 | } |
| 156 | |
Eric Miao | 566b450 | 2008-06-16 09:47:47 +0800 | [diff] [blame] | 157 | void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm) |
| 158 | { |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 159 | unsigned long flags, c; |
Eric Miao | 566b450 | 2008-06-16 09:47:47 +0800 | [diff] [blame] | 160 | int gpio; |
| 161 | |
| 162 | gpio = __mfp_validate(mfp); |
| 163 | if (gpio < 0) |
| 164 | return; |
| 165 | |
| 166 | local_irq_save(flags); |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 167 | |
| 168 | c = gpio_desc[gpio].config; |
| 169 | c = (c & ~MFP_LPM_STATE_MASK) | lpm; |
| 170 | __mfp_config_gpio(gpio, c); |
| 171 | |
Eric Miao | 566b450 | 2008-06-16 09:47:47 +0800 | [diff] [blame] | 172 | local_irq_restore(flags); |
| 173 | } |
| 174 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 175 | int gpio_set_wake(unsigned int gpio, unsigned int on) |
| 176 | { |
| 177 | struct gpio_desc *d; |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 178 | unsigned long c, mux_taken; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 179 | |
| 180 | if (gpio > mfp_to_gpio(MFP_PIN_GPIO127)) |
| 181 | return -EINVAL; |
| 182 | |
| 183 | d = &gpio_desc[gpio]; |
| 184 | c = d->config; |
| 185 | |
| 186 | if (!d->valid) |
| 187 | return -EINVAL; |
| 188 | |
Eric Miao | c09f431 | 2010-04-20 14:52:50 +0800 | [diff] [blame] | 189 | /* Allow keypad GPIOs to wakeup system when |
| 190 | * configured as generic GPIOs. |
| 191 | */ |
| 192 | if (d->keypad_gpio && (MFP_AF(d->config) == 0) && |
| 193 | (d->config & MFP_LPM_CAN_WAKEUP)) { |
| 194 | if (on) |
| 195 | PKWR |= d->mask; |
| 196 | else |
| 197 | PKWR &= ~d->mask; |
| 198 | return 0; |
| 199 | } |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 200 | |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 201 | mux_taken = (PWER & d->mux_mask) & (~d->mask); |
| 202 | if (on && mux_taken) |
| 203 | return -EBUSY; |
| 204 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 205 | if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) { |
| 206 | if (on) { |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 207 | PWER = (PWER & ~d->mux_mask) | d->mask; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 208 | |
| 209 | if (c & MFP_LPM_EDGE_RISE) |
| 210 | PRER |= d->mask; |
| 211 | else |
| 212 | PRER &= ~d->mask; |
| 213 | |
| 214 | if (c & MFP_LPM_EDGE_FALL) |
| 215 | PFER |= d->mask; |
| 216 | else |
| 217 | PFER &= ~d->mask; |
| 218 | } else { |
| 219 | PWER &= ~d->mask; |
| 220 | PRER &= ~d->mask; |
| 221 | PFER &= ~d->mask; |
| 222 | } |
| 223 | } |
| 224 | return 0; |
| 225 | } |
| 226 | |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 227 | #ifdef CONFIG_PXA25x |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 228 | static void __init pxa25x_mfp_init(void) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 229 | { |
| 230 | int i; |
| 231 | |
Haojian Zhuang | af82931 | 2012-03-06 14:57:16 +0800 | [diff] [blame] | 232 | /* running before pxa_gpio_probe() */ |
| 233 | #ifdef CONFIG_CPU_PXA26x |
| 234 | pxa_last_gpio = 89; |
| 235 | #else |
| 236 | pxa_last_gpio = 84; |
| 237 | #endif |
Eric Miao | ddd244d | 2008-11-26 17:06:42 +0800 | [diff] [blame] | 238 | for (i = 0; i <= pxa_last_gpio; i++) |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 239 | gpio_desc[i].valid = 1; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 240 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 241 | for (i = 0; i <= 15; i++) { |
| 242 | gpio_desc[i].can_wakeup = 1; |
| 243 | gpio_desc[i].mask = GPIO_bit(i); |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 244 | } |
Eric Miao | 067455a | 2008-11-26 18:12:04 +0800 | [diff] [blame] | 245 | |
| 246 | /* PXA26x has additional 4 GPIOs (86/87/88/89) which has the |
| 247 | * direction bit inverted in GPDR2. See PXA26x DM 4.1.1. |
| 248 | */ |
| 249 | for (i = 86; i <= pxa_last_gpio; i++) |
| 250 | gpio_desc[i].dir_inverted = 1; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 251 | } |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 252 | #else |
| 253 | static inline void pxa25x_mfp_init(void) {} |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 254 | #endif /* CONFIG_PXA25x */ |
| 255 | |
| 256 | #ifdef CONFIG_PXA27x |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 257 | static int pxa27x_pkwr_gpio[] = { |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 258 | 13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94, |
| 259 | 95, 96, 97, 98, 99, 100, 101, 102 |
| 260 | }; |
| 261 | |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 262 | int keypad_set_wake(unsigned int on) |
| 263 | { |
| 264 | unsigned int i, gpio, mask = 0; |
Eric Miao | c09f431 | 2010-04-20 14:52:50 +0800 | [diff] [blame] | 265 | struct gpio_desc *d; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 266 | |
| 267 | for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) { |
| 268 | |
| 269 | gpio = pxa27x_pkwr_gpio[i]; |
Eric Miao | c09f431 | 2010-04-20 14:52:50 +0800 | [diff] [blame] | 270 | d = &gpio_desc[gpio]; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 271 | |
Eric Miao | c09f431 | 2010-04-20 14:52:50 +0800 | [diff] [blame] | 272 | /* skip if configured as generic GPIO */ |
| 273 | if (MFP_AF(d->config) == 0) |
| 274 | continue; |
| 275 | |
| 276 | if (d->config & MFP_LPM_CAN_WAKEUP) |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 277 | mask |= gpio_desc[gpio].mask; |
| 278 | } |
| 279 | |
Eric Miao | c09f431 | 2010-04-20 14:52:50 +0800 | [diff] [blame] | 280 | if (on) |
| 281 | PKWR |= mask; |
| 282 | else |
| 283 | PKWR &= ~mask; |
eric miao | c0a596d | 2008-03-11 09:46:28 +0800 | [diff] [blame] | 284 | return 0; |
| 285 | } |
| 286 | |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 287 | #define PWER_WEMUX2_GPIO38 (1 << 16) |
| 288 | #define PWER_WEMUX2_GPIO53 (2 << 16) |
| 289 | #define PWER_WEMUX2_GPIO40 (3 << 16) |
| 290 | #define PWER_WEMUX2_GPIO36 (4 << 16) |
| 291 | #define PWER_WEMUX2_MASK (7 << 16) |
| 292 | #define PWER_WEMUX3_GPIO31 (1 << 19) |
| 293 | #define PWER_WEMUX3_GPIO113 (2 << 19) |
| 294 | #define PWER_WEMUX3_MASK (3 << 19) |
| 295 | |
| 296 | #define INIT_GPIO_DESC_MUXED(mux, gpio) \ |
| 297 | do { \ |
| 298 | gpio_desc[(gpio)].can_wakeup = 1; \ |
| 299 | gpio_desc[(gpio)].mask = PWER_ ## mux ## _GPIO ##gpio; \ |
| 300 | gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK; \ |
| 301 | } while (0) |
| 302 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 303 | static void __init pxa27x_mfp_init(void) |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 304 | { |
| 305 | int i, gpio; |
| 306 | |
Haojian Zhuang | af82931 | 2012-03-06 14:57:16 +0800 | [diff] [blame] | 307 | pxa_last_gpio = 120; /* running before pxa_gpio_probe() */ |
Eric Miao | ddd244d | 2008-11-26 17:06:42 +0800 | [diff] [blame] | 308 | for (i = 0; i <= pxa_last_gpio; i++) { |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 309 | /* skip GPIO2, 5, 6, 7, 8, they are not |
| 310 | * valid pins allow configuration |
| 311 | */ |
| 312 | if (i == 2 || i == 5 || i == 6 || i == 7 || i == 8) |
| 313 | continue; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 314 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 315 | gpio_desc[i].valid = 1; |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 316 | } |
| 317 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 318 | /* Keypad GPIOs */ |
| 319 | for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) { |
| 320 | gpio = pxa27x_pkwr_gpio[i]; |
| 321 | gpio_desc[gpio].can_wakeup = 1; |
| 322 | gpio_desc[gpio].keypad_gpio = 1; |
| 323 | gpio_desc[gpio].mask = 1 << i; |
| 324 | } |
| 325 | |
| 326 | /* Overwrite GPIO13 as a PWER wakeup source */ |
| 327 | for (i = 0; i <= 15; i++) { |
| 328 | /* skip GPIO2, 5, 6, 7, 8 */ |
| 329 | if (GPIO_bit(i) & 0x1e4) |
| 330 | continue; |
| 331 | |
| 332 | gpio_desc[i].can_wakeup = 1; |
| 333 | gpio_desc[i].mask = GPIO_bit(i); |
| 334 | } |
| 335 | |
| 336 | gpio_desc[35].can_wakeup = 1; |
| 337 | gpio_desc[35].mask = PWER_WE35; |
| 338 | |
Robert Jarzmik | 9968711 | 2008-11-13 23:30:00 +0100 | [diff] [blame] | 339 | INIT_GPIO_DESC_MUXED(WEMUX3, 31); |
| 340 | INIT_GPIO_DESC_MUXED(WEMUX3, 113); |
| 341 | INIT_GPIO_DESC_MUXED(WEMUX2, 38); |
| 342 | INIT_GPIO_DESC_MUXED(WEMUX2, 53); |
| 343 | INIT_GPIO_DESC_MUXED(WEMUX2, 40); |
| 344 | INIT_GPIO_DESC_MUXED(WEMUX2, 36); |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 345 | } |
| 346 | #else |
| 347 | static inline void pxa27x_mfp_init(void) {} |
| 348 | #endif /* CONFIG_PXA27x */ |
| 349 | |
| 350 | #ifdef CONFIG_PM |
| 351 | static unsigned long saved_gafr[2][4]; |
| 352 | static unsigned long saved_gpdr[4]; |
Igor Grinberg | ef7c7c6 | 2012-04-12 15:43:29 +0300 | [diff] [blame] | 353 | static unsigned long saved_gplr[4]; |
Daniel Ribeiro | 818bc81 | 2009-05-02 15:05:59 -0300 | [diff] [blame] | 354 | static unsigned long saved_pgsr[4]; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 355 | |
Rafael J. Wysocki | 2eaa03b | 2011-04-22 22:03:11 +0200 | [diff] [blame] | 356 | static int pxa2xx_mfp_suspend(void) |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 357 | { |
| 358 | int i; |
| 359 | |
Eric Miao | 1106143 | 2010-01-11 21:25:15 +0800 | [diff] [blame] | 360 | /* set corresponding PGSR bit of those marked MFP_LPM_KEEP_OUTPUT */ |
| 361 | for (i = 0; i < pxa_last_gpio; i++) { |
| 362 | if ((gpio_desc[i].config & MFP_LPM_KEEP_OUTPUT) && |
| 363 | (GPDR(i) & GPIO_bit(i))) { |
| 364 | if (GPLR(i) & GPIO_bit(i)) |
Paul Parsons | beb0c9b | 2011-05-08 01:54:33 +0000 | [diff] [blame] | 365 | PGSR(gpio_to_bank(i)) |= GPIO_bit(i); |
Eric Miao | 1106143 | 2010-01-11 21:25:15 +0800 | [diff] [blame] | 366 | else |
Paul Parsons | beb0c9b | 2011-05-08 01:54:33 +0000 | [diff] [blame] | 367 | PGSR(gpio_to_bank(i)) &= ~GPIO_bit(i); |
Eric Miao | 1106143 | 2010-01-11 21:25:15 +0800 | [diff] [blame] | 368 | } |
| 369 | } |
| 370 | |
Eric Miao | ddd244d | 2008-11-26 17:06:42 +0800 | [diff] [blame] | 371 | for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) { |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 372 | saved_gafr[0][i] = GAFR_L(i); |
| 373 | saved_gafr[1][i] = GAFR_U(i); |
| 374 | saved_gpdr[i] = GPDR(i * 32); |
Igor Grinberg | ef7c7c6 | 2012-04-12 15:43:29 +0300 | [diff] [blame] | 375 | saved_gplr[i] = GPLR(i * 32); |
Daniel Ribeiro | 818bc81 | 2009-05-02 15:05:59 -0300 | [diff] [blame] | 376 | saved_pgsr[i] = PGSR(i); |
Igor Grinberg | ef7c7c6 | 2012-04-12 15:43:29 +0300 | [diff] [blame] | 377 | |
| 378 | GPSR(i * 32) = PGSR(i); |
| 379 | GPCR(i * 32) = ~PGSR(i); |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 380 | } |
Igor Grinberg | a13b8787 | 2012-04-12 15:43:28 +0300 | [diff] [blame] | 381 | |
| 382 | /* set GPDR bits taking into account MFP_LPM_KEEP_OUTPUT */ |
| 383 | for (i = 0; i < pxa_last_gpio; i++) { |
| 384 | if ((gpdr_lpm[gpio_to_bank(i)] & GPIO_bit(i)) || |
| 385 | ((gpio_desc[i].config & MFP_LPM_KEEP_OUTPUT) && |
| 386 | (saved_gpdr[gpio_to_bank(i)] & GPIO_bit(i)))) |
| 387 | GPDR(i) |= GPIO_bit(i); |
| 388 | else |
| 389 | GPDR(i) &= ~GPIO_bit(i); |
| 390 | } |
| 391 | |
eric miao | 7facc2f9 | 2008-03-05 17:16:29 +0800 | [diff] [blame] | 392 | return 0; |
| 393 | } |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 394 | |
Rafael J. Wysocki | 2eaa03b | 2011-04-22 22:03:11 +0200 | [diff] [blame] | 395 | static void pxa2xx_mfp_resume(void) |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 396 | { |
| 397 | int i; |
| 398 | |
Eric Miao | ddd244d | 2008-11-26 17:06:42 +0800 | [diff] [blame] | 399 | for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) { |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 400 | GAFR_L(i) = saved_gafr[0][i]; |
| 401 | GAFR_U(i) = saved_gafr[1][i]; |
Igor Grinberg | ef7c7c6 | 2012-04-12 15:43:29 +0300 | [diff] [blame] | 402 | GPSR(i * 32) = saved_gplr[i]; |
| 403 | GPCR(i * 32) = ~saved_gplr[i]; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 404 | GPDR(i * 32) = saved_gpdr[i]; |
Daniel Ribeiro | 818bc81 | 2009-05-02 15:05:59 -0300 | [diff] [blame] | 405 | PGSR(i) = saved_pgsr[i]; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 406 | } |
| 407 | PSSR = PSSR_RDH | PSSR_PH; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 408 | } |
| 409 | #else |
| 410 | #define pxa2xx_mfp_suspend NULL |
| 411 | #define pxa2xx_mfp_resume NULL |
| 412 | #endif |
| 413 | |
Rafael J. Wysocki | 2eaa03b | 2011-04-22 22:03:11 +0200 | [diff] [blame] | 414 | struct syscore_ops pxa2xx_mfp_syscore_ops = { |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 415 | .suspend = pxa2xx_mfp_suspend, |
| 416 | .resume = pxa2xx_mfp_resume, |
| 417 | }; |
| 418 | |
| 419 | static int __init pxa2xx_mfp_init(void) |
| 420 | { |
| 421 | int i; |
| 422 | |
Eric Miao | e7f3c60 | 2008-09-27 18:07:48 +0800 | [diff] [blame] | 423 | if (!cpu_is_pxa2xx()) |
| 424 | return 0; |
| 425 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 426 | if (cpu_is_pxa25x()) |
| 427 | pxa25x_mfp_init(); |
| 428 | |
| 429 | if (cpu_is_pxa27x()) |
| 430 | pxa27x_mfp_init(); |
| 431 | |
Timothy Clacy | 866bd43 | 2009-05-07 19:40:33 +0200 | [diff] [blame] | 432 | /* clear RDH bit to enable GPIO receivers after reset/sleep exit */ |
| 433 | PSSR = PSSR_RDH; |
| 434 | |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 435 | /* initialize gafr_run[], pgsr_lpm[] from existing values */ |
Eric Miao | ddd244d | 2008-11-26 17:06:42 +0800 | [diff] [blame] | 436 | for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 437 | gpdr_lpm[i] = GPDR(i * 32); |
| 438 | |
Rafael J. Wysocki | 2eaa03b | 2011-04-22 22:03:11 +0200 | [diff] [blame] | 439 | return 0; |
Eric Miao | 5a3d965 | 2008-09-03 18:06:34 +0800 | [diff] [blame] | 440 | } |
| 441 | postcore_initcall(pxa2xx_mfp_init); |