Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2013 |
| 3 | * |
| 4 | * Author: Patrice Chotard <patrice.chotard@st.com> |
| 5 | * License terms: GNU General Public License (GPL) version 2 |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/err.h> |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 17 | #include <linux/of.h> |
| 18 | #include <linux/of_device.h> |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/gpio.h> |
| 21 | #include <linux/irq.h> |
Lee Jones | ac652d7 | 2013-01-31 10:43:00 +0000 | [diff] [blame] | 22 | #include <linux/irqdomain.h> |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/bitops.h> |
| 25 | #include <linux/mfd/abx500.h> |
| 26 | #include <linux/mfd/abx500/ab8500.h> |
| 27 | #include <linux/mfd/abx500/ab8500-gpio.h> |
| 28 | #include <linux/pinctrl/pinctrl.h> |
| 29 | #include <linux/pinctrl/consumer.h> |
| 30 | #include <linux/pinctrl/pinmux.h> |
| 31 | #include <linux/pinctrl/pinconf.h> |
| 32 | #include <linux/pinctrl/pinconf-generic.h> |
| 33 | |
| 34 | #include "pinctrl-abx500.h" |
| 35 | |
| 36 | /* |
| 37 | * The AB9540 and AB8540 GPIO support are extended versions |
| 38 | * of the AB8500 GPIO support. |
| 39 | * The AB9540 supports an additional (7th) register so that |
| 40 | * more GPIO may be configured and used. |
| 41 | * The AB8540 supports 4 new gpios (GPIOx_VBAT) that have |
| 42 | * internal pull-up and pull-down capabilities. |
| 43 | */ |
| 44 | |
| 45 | /* |
| 46 | * GPIO registers offset |
| 47 | * Bank: 0x10 |
| 48 | */ |
| 49 | #define AB8500_GPIO_SEL1_REG 0x00 |
| 50 | #define AB8500_GPIO_SEL2_REG 0x01 |
| 51 | #define AB8500_GPIO_SEL3_REG 0x02 |
| 52 | #define AB8500_GPIO_SEL4_REG 0x03 |
| 53 | #define AB8500_GPIO_SEL5_REG 0x04 |
| 54 | #define AB8500_GPIO_SEL6_REG 0x05 |
| 55 | #define AB9540_GPIO_SEL7_REG 0x06 |
| 56 | |
| 57 | #define AB8500_GPIO_DIR1_REG 0x10 |
| 58 | #define AB8500_GPIO_DIR2_REG 0x11 |
| 59 | #define AB8500_GPIO_DIR3_REG 0x12 |
| 60 | #define AB8500_GPIO_DIR4_REG 0x13 |
| 61 | #define AB8500_GPIO_DIR5_REG 0x14 |
| 62 | #define AB8500_GPIO_DIR6_REG 0x15 |
| 63 | #define AB9540_GPIO_DIR7_REG 0x16 |
| 64 | |
| 65 | #define AB8500_GPIO_OUT1_REG 0x20 |
| 66 | #define AB8500_GPIO_OUT2_REG 0x21 |
| 67 | #define AB8500_GPIO_OUT3_REG 0x22 |
| 68 | #define AB8500_GPIO_OUT4_REG 0x23 |
| 69 | #define AB8500_GPIO_OUT5_REG 0x24 |
| 70 | #define AB8500_GPIO_OUT6_REG 0x25 |
| 71 | #define AB9540_GPIO_OUT7_REG 0x26 |
| 72 | |
| 73 | #define AB8500_GPIO_PUD1_REG 0x30 |
| 74 | #define AB8500_GPIO_PUD2_REG 0x31 |
| 75 | #define AB8500_GPIO_PUD3_REG 0x32 |
| 76 | #define AB8500_GPIO_PUD4_REG 0x33 |
| 77 | #define AB8500_GPIO_PUD5_REG 0x34 |
| 78 | #define AB8500_GPIO_PUD6_REG 0x35 |
| 79 | #define AB9540_GPIO_PUD7_REG 0x36 |
| 80 | |
| 81 | #define AB8500_GPIO_IN1_REG 0x40 |
| 82 | #define AB8500_GPIO_IN2_REG 0x41 |
| 83 | #define AB8500_GPIO_IN3_REG 0x42 |
| 84 | #define AB8500_GPIO_IN4_REG 0x43 |
| 85 | #define AB8500_GPIO_IN5_REG 0x44 |
| 86 | #define AB8500_GPIO_IN6_REG 0x45 |
| 87 | #define AB9540_GPIO_IN7_REG 0x46 |
| 88 | #define AB8540_GPIO_VINSEL_REG 0x47 |
| 89 | #define AB8540_GPIO_PULL_UPDOWN_REG 0x48 |
| 90 | #define AB8500_GPIO_ALTFUN_REG 0x50 |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 91 | #define AB8540_GPIO_PULL_UPDOWN_MASK 0x03 |
| 92 | #define AB8540_GPIO_VINSEL_MASK 0x03 |
| 93 | #define AB8540_GPIOX_VBAT_START 51 |
| 94 | #define AB8540_GPIOX_VBAT_END 54 |
| 95 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 96 | struct abx500_pinctrl { |
| 97 | struct device *dev; |
| 98 | struct pinctrl_dev *pctldev; |
| 99 | struct abx500_pinctrl_soc_data *soc; |
| 100 | struct gpio_chip chip; |
| 101 | struct ab8500 *parent; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 102 | struct abx500_gpio_irq_cluster *irq_cluster; |
| 103 | int irq_cluster_size; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | /** |
| 107 | * to_abx500_pinctrl() - get the pointer to abx500_pinctrl |
| 108 | * @chip: Member of the structure abx500_pinctrl |
| 109 | */ |
| 110 | static inline struct abx500_pinctrl *to_abx500_pinctrl(struct gpio_chip *chip) |
| 111 | { |
| 112 | return container_of(chip, struct abx500_pinctrl, chip); |
| 113 | } |
| 114 | |
| 115 | static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 116 | unsigned offset, bool *bit) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 117 | { |
| 118 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 119 | u8 pos = offset % 8; |
| 120 | u8 val; |
| 121 | int ret; |
| 122 | |
| 123 | reg += offset / 8; |
| 124 | ret = abx500_get_register_interruptible(pct->dev, |
| 125 | AB8500_MISC, reg, &val); |
| 126 | |
| 127 | *bit = !!(val & BIT(pos)); |
| 128 | |
| 129 | if (ret < 0) |
| 130 | dev_err(pct->dev, |
| 131 | "%s read reg =%x, offset=%x failed\n", |
| 132 | __func__, reg, offset); |
| 133 | |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 138 | unsigned offset, int val) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 139 | { |
| 140 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 141 | u8 pos = offset % 8; |
| 142 | int ret; |
| 143 | |
| 144 | reg += offset / 8; |
| 145 | ret = abx500_mask_and_set_register_interruptible(pct->dev, |
Lee Jones | 49dcf08 | 2013-01-23 13:26:02 +0000 | [diff] [blame] | 146 | AB8500_MISC, reg, BIT(pos), val << pos); |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 147 | if (ret < 0) |
| 148 | dev_err(pct->dev, "%s write failed\n", __func__); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 149 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 150 | return ret; |
| 151 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 152 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 153 | /** |
| 154 | * abx500_gpio_get() - Get the particular GPIO value |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 155 | * @chip: Gpio device |
| 156 | * @offset: GPIO number to read |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 157 | */ |
| 158 | static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset) |
| 159 | { |
| 160 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 161 | bool bit; |
| 162 | int ret; |
| 163 | |
| 164 | ret = abx500_gpio_get_bit(chip, AB8500_GPIO_IN1_REG, |
| 165 | offset, &bit); |
| 166 | if (ret < 0) { |
| 167 | dev_err(pct->dev, "%s failed\n", __func__); |
| 168 | return ret; |
| 169 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 170 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 171 | return bit; |
| 172 | } |
| 173 | |
| 174 | static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val) |
| 175 | { |
| 176 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 177 | int ret; |
| 178 | |
| 179 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val); |
| 180 | if (ret < 0) |
| 181 | dev_err(pct->dev, "%s write failed\n", __func__); |
| 182 | } |
| 183 | |
| 184 | static int abx500_config_pull_updown(struct abx500_pinctrl *pct, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 185 | int offset, enum abx500_gpio_pull_updown val) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 186 | { |
| 187 | u8 pos; |
| 188 | int ret; |
| 189 | struct pullud *pullud; |
| 190 | |
| 191 | if (!pct->soc->pullud) { |
| 192 | dev_err(pct->dev, "%s AB chip doesn't support pull up/down feature", |
| 193 | __func__); |
| 194 | ret = -EPERM; |
| 195 | goto out; |
| 196 | } |
| 197 | |
| 198 | pullud = pct->soc->pullud; |
| 199 | |
| 200 | if ((offset < pullud->first_pin) |
| 201 | || (offset > pullud->last_pin)) { |
| 202 | ret = -EINVAL; |
| 203 | goto out; |
| 204 | } |
| 205 | |
Patrice Chotard | 10a8be5 | 2013-05-24 14:06:29 +0200 | [diff] [blame] | 206 | pos = (offset - pullud->first_pin) << 1; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 207 | |
| 208 | ret = abx500_mask_and_set_register_interruptible(pct->dev, |
| 209 | AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG, |
| 210 | AB8540_GPIO_PULL_UPDOWN_MASK << pos, val << pos); |
| 211 | |
| 212 | out: |
| 213 | if (ret < 0) |
| 214 | dev_err(pct->dev, "%s failed (%d)\n", __func__, ret); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 215 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | static int abx500_gpio_direction_output(struct gpio_chip *chip, |
| 220 | unsigned offset, |
| 221 | int val) |
| 222 | { |
| 223 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 224 | struct pullud *pullud = pct->soc->pullud; |
| 225 | unsigned gpio; |
| 226 | int ret; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 227 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 228 | /* set direction as output */ |
| 229 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 1); |
| 230 | if (ret < 0) |
| 231 | return ret; |
| 232 | |
| 233 | /* disable pull down */ |
| 234 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, offset, 1); |
| 235 | if (ret < 0) |
| 236 | return ret; |
| 237 | |
| 238 | /* if supported, disable both pull down and pull up */ |
| 239 | gpio = offset + 1; |
| 240 | if (pullud && gpio >= pullud->first_pin && gpio <= pullud->last_pin) { |
| 241 | ret = abx500_config_pull_updown(pct, |
| 242 | gpio, |
| 243 | ABX500_GPIO_PULL_NONE); |
| 244 | if (ret < 0) |
| 245 | return ret; |
| 246 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 247 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 248 | /* set the output as 1 or 0 */ |
| 249 | return abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val); |
| 250 | } |
| 251 | |
| 252 | static int abx500_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
| 253 | { |
| 254 | /* set the register as input */ |
| 255 | return abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 0); |
| 256 | } |
| 257 | |
| 258 | static int abx500_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
| 259 | { |
| 260 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
Lee Jones | b9fab6e | 2013-01-31 09:45:17 +0000 | [diff] [blame] | 261 | /* The AB8500 GPIO numbers are off by one */ |
| 262 | int gpio = offset + 1; |
Lee Jones | a6a16d2 | 2013-01-31 09:57:52 +0000 | [diff] [blame] | 263 | int hwirq; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 264 | int i; |
| 265 | |
| 266 | for (i = 0; i < pct->irq_cluster_size; i++) { |
| 267 | struct abx500_gpio_irq_cluster *cluster = |
| 268 | &pct->irq_cluster[i]; |
| 269 | |
Lee Jones | a6a16d2 | 2013-01-31 09:57:52 +0000 | [diff] [blame] | 270 | if (gpio >= cluster->start && gpio <= cluster->end) { |
| 271 | /* |
| 272 | * The ABx500 GPIO's associated IRQs are clustered together |
| 273 | * throughout the interrupt numbers at irregular intervals. |
| 274 | * To solve this quandry, we have placed the read-in values |
| 275 | * into the cluster information table. |
| 276 | */ |
Linus Walleij | 43a255d | 2013-02-04 15:21:41 +0100 | [diff] [blame] | 277 | hwirq = gpio - cluster->start + cluster->to_irq; |
Lee Jones | a6a16d2 | 2013-01-31 09:57:52 +0000 | [diff] [blame] | 278 | return irq_create_mapping(pct->parent->domain, hwirq); |
| 279 | } |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | return -EINVAL; |
| 283 | } |
| 284 | |
| 285 | static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 286 | unsigned gpio, int alt_setting) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 287 | { |
| 288 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 289 | struct alternate_functions af = pct->soc->alternate_functions[gpio]; |
| 290 | int ret; |
| 291 | int val; |
| 292 | unsigned offset; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 293 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 294 | const char *modes[] = { |
| 295 | [ABX500_DEFAULT] = "default", |
| 296 | [ABX500_ALT_A] = "altA", |
| 297 | [ABX500_ALT_B] = "altB", |
| 298 | [ABX500_ALT_C] = "altC", |
| 299 | }; |
| 300 | |
| 301 | /* sanity check */ |
| 302 | if (((alt_setting == ABX500_ALT_A) && (af.gpiosel_bit == UNUSED)) || |
| 303 | ((alt_setting == ABX500_ALT_B) && (af.alt_bit1 == UNUSED)) || |
| 304 | ((alt_setting == ABX500_ALT_C) && (af.alt_bit2 == UNUSED))) { |
| 305 | dev_dbg(pct->dev, "pin %d doesn't support %s mode\n", gpio, |
| 306 | modes[alt_setting]); |
| 307 | return -EINVAL; |
| 308 | } |
| 309 | |
| 310 | /* on ABx5xx, there is no GPIO0, so adjust the offset */ |
| 311 | offset = gpio - 1; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 312 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 313 | switch (alt_setting) { |
| 314 | case ABX500_DEFAULT: |
| 315 | /* |
| 316 | * for ABx5xx family, default mode is always selected by |
| 317 | * writing 0 to GPIOSELx register, except for pins which |
| 318 | * support at least ALT_B mode, default mode is selected |
| 319 | * by writing 1 to GPIOSELx register |
| 320 | */ |
| 321 | val = 0; |
| 322 | if (af.alt_bit1 != UNUSED) |
| 323 | val++; |
| 324 | |
| 325 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, |
| 326 | offset, val); |
| 327 | break; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 328 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 329 | case ABX500_ALT_A: |
| 330 | /* |
| 331 | * for ABx5xx family, alt_a mode is always selected by |
| 332 | * writing 1 to GPIOSELx register, except for pins which |
| 333 | * support at least ALT_B mode, alt_a mode is selected |
| 334 | * by writing 0 to GPIOSELx register and 0 in ALTFUNC |
| 335 | * register |
| 336 | */ |
| 337 | if (af.alt_bit1 != UNUSED) { |
| 338 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, |
| 339 | offset, 0); |
| 340 | ret = abx500_gpio_set_bits(chip, |
| 341 | AB8500_GPIO_ALTFUN_REG, |
| 342 | af.alt_bit1, |
| 343 | !!(af.alta_val && BIT(0))); |
| 344 | if (af.alt_bit2 != UNUSED) |
| 345 | ret = abx500_gpio_set_bits(chip, |
| 346 | AB8500_GPIO_ALTFUN_REG, |
| 347 | af.alt_bit2, |
| 348 | !!(af.alta_val && BIT(1))); |
| 349 | } else |
| 350 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, |
| 351 | offset, 1); |
| 352 | break; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 353 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 354 | case ABX500_ALT_B: |
| 355 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, |
| 356 | offset, 0); |
| 357 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, |
| 358 | af.alt_bit1, !!(af.altb_val && BIT(0))); |
| 359 | if (af.alt_bit2 != UNUSED) |
| 360 | ret = abx500_gpio_set_bits(chip, |
| 361 | AB8500_GPIO_ALTFUN_REG, |
| 362 | af.alt_bit2, |
| 363 | !!(af.altb_val && BIT(1))); |
| 364 | break; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 365 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 366 | case ABX500_ALT_C: |
| 367 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, |
| 368 | offset, 0); |
| 369 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, |
| 370 | af.alt_bit2, !!(af.altc_val && BIT(0))); |
| 371 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, |
| 372 | af.alt_bit2, !!(af.altc_val && BIT(1))); |
| 373 | break; |
| 374 | |
| 375 | default: |
| 376 | dev_dbg(pct->dev, "unknow alt_setting %d\n", alt_setting); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 377 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 378 | return -EINVAL; |
| 379 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 380 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 381 | return ret; |
| 382 | } |
| 383 | |
| 384 | static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 385 | unsigned gpio) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 386 | { |
| 387 | u8 mode; |
| 388 | bool bit_mode; |
| 389 | bool alt_bit1; |
| 390 | bool alt_bit2; |
| 391 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 392 | struct alternate_functions af = pct->soc->alternate_functions[gpio]; |
Linus Walleij | a950cb7 | 2013-02-05 20:10:57 +0100 | [diff] [blame] | 393 | /* on ABx5xx, there is no GPIO0, so adjust the offset */ |
| 394 | unsigned offset = gpio - 1; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 395 | |
| 396 | /* |
| 397 | * if gpiosel_bit is set to unused, |
| 398 | * it means no GPIO or special case |
| 399 | */ |
| 400 | if (af.gpiosel_bit == UNUSED) |
| 401 | return ABX500_DEFAULT; |
| 402 | |
| 403 | /* read GpioSelx register */ |
Linus Walleij | a950cb7 | 2013-02-05 20:10:57 +0100 | [diff] [blame] | 404 | abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (offset / 8), |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 405 | af.gpiosel_bit, &bit_mode); |
| 406 | mode = bit_mode; |
| 407 | |
| 408 | /* sanity check */ |
| 409 | if ((af.alt_bit1 < UNUSED) || (af.alt_bit1 > 7) || |
| 410 | (af.alt_bit2 < UNUSED) || (af.alt_bit2 > 7)) { |
| 411 | dev_err(pct->dev, |
| 412 | "alt_bitX value not in correct range (-1 to 7)\n"); |
| 413 | return -EINVAL; |
| 414 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 415 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 416 | /* if alt_bit2 is used, alt_bit1 must be used too */ |
| 417 | if ((af.alt_bit2 != UNUSED) && (af.alt_bit1 == UNUSED)) { |
| 418 | dev_err(pct->dev, |
| 419 | "if alt_bit2 is used, alt_bit1 can't be unused\n"); |
| 420 | return -EINVAL; |
| 421 | } |
| 422 | |
| 423 | /* check if pin use AlternateFunction register */ |
Axel Lin | 6a40cdd | 2013-03-05 14:58:53 +0800 | [diff] [blame] | 424 | if ((af.alt_bit1 == UNUSED) && (af.alt_bit2 == UNUSED)) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 425 | return mode; |
| 426 | /* |
| 427 | * if pin GPIOSEL bit is set and pin supports alternate function, |
| 428 | * it means DEFAULT mode |
| 429 | */ |
| 430 | if (mode) |
| 431 | return ABX500_DEFAULT; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 432 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 433 | /* |
| 434 | * pin use the AlternatFunction register |
| 435 | * read alt_bit1 value |
| 436 | */ |
| 437 | abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, |
| 438 | af.alt_bit1, &alt_bit1); |
| 439 | |
| 440 | if (af.alt_bit2 != UNUSED) |
| 441 | /* read alt_bit2 value */ |
| 442 | abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, af.alt_bit2, |
| 443 | &alt_bit2); |
| 444 | else |
| 445 | alt_bit2 = 0; |
| 446 | |
| 447 | mode = (alt_bit2 << 1) + alt_bit1; |
| 448 | if (mode == af.alta_val) |
| 449 | return ABX500_ALT_A; |
| 450 | else if (mode == af.altb_val) |
| 451 | return ABX500_ALT_B; |
| 452 | else |
| 453 | return ABX500_ALT_C; |
| 454 | } |
| 455 | |
| 456 | #ifdef CONFIG_DEBUG_FS |
| 457 | |
| 458 | #include <linux/seq_file.h> |
| 459 | |
| 460 | static void abx500_gpio_dbg_show_one(struct seq_file *s, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 461 | struct pinctrl_dev *pctldev, |
| 462 | struct gpio_chip *chip, |
| 463 | unsigned offset, unsigned gpio) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 464 | { |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 465 | const char *label = gpiochip_is_requested(chip, offset - 1); |
| 466 | u8 gpio_offset = offset - 1; |
| 467 | int mode = -1; |
| 468 | bool is_out; |
| 469 | bool pull; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 470 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 471 | const char *modes[] = { |
| 472 | [ABX500_DEFAULT] = "default", |
| 473 | [ABX500_ALT_A] = "altA", |
| 474 | [ABX500_ALT_B] = "altB", |
| 475 | [ABX500_ALT_C] = "altC", |
| 476 | }; |
| 477 | |
| 478 | abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG, gpio_offset, &is_out); |
| 479 | abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG, gpio_offset, &pull); |
| 480 | |
| 481 | if (pctldev) |
| 482 | mode = abx500_get_mode(pctldev, chip, offset); |
| 483 | |
| 484 | seq_printf(s, " gpio-%-3d (%-20.20s) %-3s %-9s %s", |
| 485 | gpio, label ?: "(none)", |
| 486 | is_out ? "out" : "in ", |
| 487 | is_out ? |
| 488 | (chip->get |
| 489 | ? (chip->get(chip, offset) ? "hi" : "lo") |
| 490 | : "? ") |
| 491 | : (pull ? "pull up" : "pull down"), |
| 492 | (mode < 0) ? "unknown" : modes[mode]); |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) |
| 496 | { |
| 497 | unsigned i; |
| 498 | unsigned gpio = chip->base; |
| 499 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); |
| 500 | struct pinctrl_dev *pctldev = pct->pctldev; |
| 501 | |
| 502 | for (i = 0; i < chip->ngpio; i++, gpio++) { |
| 503 | /* On AB8500, there is no GPIO0, the first is the GPIO 1 */ |
| 504 | abx500_gpio_dbg_show_one(s, pctldev, chip, i + 1, gpio); |
| 505 | seq_printf(s, "\n"); |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | #else |
| 510 | static inline void abx500_gpio_dbg_show_one(struct seq_file *s, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 511 | struct pinctrl_dev *pctldev, |
| 512 | struct gpio_chip *chip, |
| 513 | unsigned offset, unsigned gpio) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 514 | { |
| 515 | } |
| 516 | #define abx500_gpio_dbg_show NULL |
| 517 | #endif |
| 518 | |
Sachin Kamat | 9c4154e | 2013-03-19 12:01:17 +0530 | [diff] [blame] | 519 | static int abx500_gpio_request(struct gpio_chip *chip, unsigned offset) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 520 | { |
| 521 | int gpio = chip->base + offset; |
| 522 | |
| 523 | return pinctrl_request_gpio(gpio); |
| 524 | } |
| 525 | |
Sachin Kamat | 9c4154e | 2013-03-19 12:01:17 +0530 | [diff] [blame] | 526 | static void abx500_gpio_free(struct gpio_chip *chip, unsigned offset) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 527 | { |
| 528 | int gpio = chip->base + offset; |
| 529 | |
| 530 | pinctrl_free_gpio(gpio); |
| 531 | } |
| 532 | |
| 533 | static struct gpio_chip abx500gpio_chip = { |
| 534 | .label = "abx500-gpio", |
| 535 | .owner = THIS_MODULE, |
| 536 | .request = abx500_gpio_request, |
| 537 | .free = abx500_gpio_free, |
| 538 | .direction_input = abx500_gpio_direction_input, |
| 539 | .get = abx500_gpio_get, |
| 540 | .direction_output = abx500_gpio_direction_output, |
| 541 | .set = abx500_gpio_set, |
| 542 | .to_irq = abx500_gpio_to_irq, |
| 543 | .dbg_show = abx500_gpio_dbg_show, |
| 544 | }; |
| 545 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 546 | static int abx500_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) |
| 547 | { |
| 548 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 549 | |
| 550 | return pct->soc->nfunctions; |
| 551 | } |
| 552 | |
| 553 | static const char *abx500_pmx_get_func_name(struct pinctrl_dev *pctldev, |
| 554 | unsigned function) |
| 555 | { |
| 556 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 557 | |
| 558 | return pct->soc->functions[function].name; |
| 559 | } |
| 560 | |
| 561 | static int abx500_pmx_get_func_groups(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 562 | unsigned function, |
| 563 | const char * const **groups, |
| 564 | unsigned * const num_groups) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 565 | { |
| 566 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 567 | |
| 568 | *groups = pct->soc->functions[function].groups; |
| 569 | *num_groups = pct->soc->functions[function].ngroups; |
| 570 | |
| 571 | return 0; |
| 572 | } |
| 573 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 574 | static int abx500_pmx_enable(struct pinctrl_dev *pctldev, unsigned function, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 575 | unsigned group) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 576 | { |
| 577 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 578 | struct gpio_chip *chip = &pct->chip; |
| 579 | const struct abx500_pingroup *g; |
| 580 | int i; |
| 581 | int ret = 0; |
| 582 | |
| 583 | g = &pct->soc->groups[group]; |
| 584 | if (g->altsetting < 0) |
| 585 | return -EINVAL; |
| 586 | |
| 587 | dev_dbg(pct->dev, "enable group %s, %u pins\n", g->name, g->npins); |
| 588 | |
| 589 | for (i = 0; i < g->npins; i++) { |
| 590 | dev_dbg(pct->dev, "setting pin %d to altsetting %d\n", |
| 591 | g->pins[i], g->altsetting); |
| 592 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 593 | ret = abx500_set_mode(pctldev, chip, g->pins[i], g->altsetting); |
| 594 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 595 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 596 | return ret; |
| 597 | } |
| 598 | |
| 599 | static void abx500_pmx_disable(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 600 | unsigned function, unsigned group) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 601 | { |
| 602 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 603 | const struct abx500_pingroup *g; |
| 604 | |
| 605 | g = &pct->soc->groups[group]; |
| 606 | if (g->altsetting < 0) |
| 607 | return; |
| 608 | |
| 609 | /* FIXME: poke out the mux, set the pin to some default state? */ |
| 610 | dev_dbg(pct->dev, "disable group %s, %u pins\n", g->name, g->npins); |
| 611 | } |
| 612 | |
Sachin Kamat | 9c4154e | 2013-03-19 12:01:17 +0530 | [diff] [blame] | 613 | static int abx500_gpio_request_enable(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 614 | struct pinctrl_gpio_range *range, |
| 615 | unsigned offset) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 616 | { |
| 617 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 618 | const struct abx500_pinrange *p; |
| 619 | int ret; |
| 620 | int i; |
| 621 | |
| 622 | /* |
| 623 | * Different ranges have different ways to enable GPIO function on a |
| 624 | * pin, so refer back to our local range type, where we handily define |
| 625 | * what altfunc enables GPIO for a certain pin. |
| 626 | */ |
| 627 | for (i = 0; i < pct->soc->gpio_num_ranges; i++) { |
| 628 | p = &pct->soc->gpio_ranges[i]; |
| 629 | if ((offset >= p->offset) && |
| 630 | (offset < (p->offset + p->npins))) |
| 631 | break; |
| 632 | } |
| 633 | |
| 634 | if (i == pct->soc->gpio_num_ranges) { |
| 635 | dev_err(pct->dev, "%s failed to locate range\n", __func__); |
| 636 | return -ENODEV; |
| 637 | } |
| 638 | |
| 639 | dev_dbg(pct->dev, "enable GPIO by altfunc %d at gpio %d\n", |
| 640 | p->altfunc, offset); |
| 641 | |
| 642 | ret = abx500_set_mode(pct->pctldev, &pct->chip, |
| 643 | offset, p->altfunc); |
| 644 | if (ret < 0) { |
| 645 | dev_err(pct->dev, "%s setting altfunc failed\n", __func__); |
| 646 | return ret; |
| 647 | } |
| 648 | |
| 649 | return ret; |
| 650 | } |
| 651 | |
| 652 | static void abx500_gpio_disable_free(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 653 | struct pinctrl_gpio_range *range, |
| 654 | unsigned offset) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 655 | { |
| 656 | } |
| 657 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 658 | static const struct pinmux_ops abx500_pinmux_ops = { |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 659 | .get_functions_count = abx500_pmx_get_funcs_cnt, |
| 660 | .get_function_name = abx500_pmx_get_func_name, |
| 661 | .get_function_groups = abx500_pmx_get_func_groups, |
| 662 | .enable = abx500_pmx_enable, |
| 663 | .disable = abx500_pmx_disable, |
| 664 | .gpio_request_enable = abx500_gpio_request_enable, |
| 665 | .gpio_disable_free = abx500_gpio_disable_free, |
| 666 | }; |
| 667 | |
| 668 | static int abx500_get_groups_cnt(struct pinctrl_dev *pctldev) |
| 669 | { |
| 670 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 671 | |
| 672 | return pct->soc->ngroups; |
| 673 | } |
| 674 | |
| 675 | static const char *abx500_get_group_name(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 676 | unsigned selector) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 677 | { |
| 678 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 679 | |
| 680 | return pct->soc->groups[selector].name; |
| 681 | } |
| 682 | |
| 683 | static int abx500_get_group_pins(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 684 | unsigned selector, |
| 685 | const unsigned **pins, |
| 686 | unsigned *num_pins) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 687 | { |
| 688 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 689 | |
| 690 | *pins = pct->soc->groups[selector].pins; |
| 691 | *num_pins = pct->soc->groups[selector].npins; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 692 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 693 | return 0; |
| 694 | } |
| 695 | |
| 696 | static void abx500_pin_dbg_show(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 697 | struct seq_file *s, unsigned offset) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 698 | { |
| 699 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 700 | struct gpio_chip *chip = &pct->chip; |
| 701 | |
| 702 | abx500_gpio_dbg_show_one(s, pctldev, chip, offset, |
| 703 | chip->base + offset - 1); |
| 704 | } |
| 705 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 706 | static const struct pinctrl_ops abx500_pinctrl_ops = { |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 707 | .get_groups_count = abx500_get_groups_cnt, |
| 708 | .get_group_name = abx500_get_group_name, |
| 709 | .get_group_pins = abx500_get_group_pins, |
| 710 | .pin_dbg_show = abx500_pin_dbg_show, |
| 711 | }; |
| 712 | |
Sachin Kamat | 9c4154e | 2013-03-19 12:01:17 +0530 | [diff] [blame] | 713 | static int abx500_pin_config_get(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 714 | unsigned pin, |
| 715 | unsigned long *config) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 716 | { |
Lee Jones | 1abeebe | 2012-12-20 11:11:19 +0000 | [diff] [blame] | 717 | return -ENOSYS; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 718 | } |
| 719 | |
Sachin Kamat | 9c4154e | 2013-03-19 12:01:17 +0530 | [diff] [blame] | 720 | static int abx500_pin_config_set(struct pinctrl_dev *pctldev, |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 721 | unsigned pin, |
| 722 | unsigned long config) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 723 | { |
| 724 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); |
| 725 | struct pullud *pullud = pct->soc->pullud; |
| 726 | struct gpio_chip *chip = &pct->chip; |
| 727 | unsigned offset; |
Patrice Chotard | 9ed3cd3 | 2013-05-24 14:06:30 +0200 | [diff] [blame^] | 728 | int ret = 0; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 729 | enum pin_config_param param = pinconf_to_config_param(config); |
| 730 | enum pin_config_param argument = pinconf_to_config_argument(config); |
| 731 | |
| 732 | dev_dbg(chip->dev, "pin %d [%#lx]: %s %s\n", |
| 733 | pin, config, (param == PIN_CONFIG_OUTPUT) ? "output " : "input", |
| 734 | (param == PIN_CONFIG_OUTPUT) ? (argument ? "high" : "low") : |
| 735 | (argument ? "pull up" : "pull down")); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 736 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 737 | /* on ABx500, there is no GPIO0, so adjust the offset */ |
| 738 | offset = pin - 1; |
| 739 | |
| 740 | switch (param) { |
| 741 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 742 | /* |
| 743 | * if argument = 1 set the pull down |
| 744 | * else clear the pull down |
| 745 | */ |
| 746 | ret = abx500_gpio_direction_input(chip, offset); |
| 747 | /* |
| 748 | * Some chips only support pull down, while some actually |
| 749 | * support both pull up and pull down. Such chips have |
| 750 | * a "pullud" range specified for the pins that support |
| 751 | * both features. If the pin is not within that range, we |
| 752 | * fall back to the old bit set that only support pull down. |
| 753 | */ |
| 754 | if (pullud && |
| 755 | pin >= pullud->first_pin && |
| 756 | pin <= pullud->last_pin) |
| 757 | ret = abx500_config_pull_updown(pct, |
| 758 | pin, |
| 759 | argument ? ABX500_GPIO_PULL_DOWN : ABX500_GPIO_PULL_NONE); |
| 760 | else |
| 761 | /* Chip only supports pull down */ |
| 762 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, |
| 763 | offset, argument ? 0 : 1); |
| 764 | break; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 765 | |
Patrice Chotard | 9ed3cd3 | 2013-05-24 14:06:30 +0200 | [diff] [blame^] | 766 | case PIN_CONFIG_BIAS_PULL_UP: |
| 767 | /* |
| 768 | * if argument = 1 set the pull up |
| 769 | * else clear the pull up |
| 770 | */ |
| 771 | ret = abx500_gpio_direction_input(chip, offset); |
| 772 | /* |
| 773 | * Some chips only support pull down, while some actually |
| 774 | * support both pull up and pull down. Such chips have |
| 775 | * a "pullud" range specified for the pins that support |
| 776 | * both features. If the pin is not within that range, do |
| 777 | * nothing |
| 778 | */ |
| 779 | if (pullud && |
| 780 | pin >= pullud->first_pin && |
| 781 | pin <= pullud->last_pin) { |
| 782 | ret = abx500_config_pull_updown(pct, |
| 783 | pin, |
| 784 | argument ? ABX500_GPIO_PULL_UP : ABX500_GPIO_PULL_NONE); |
| 785 | } |
| 786 | break; |
| 787 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 788 | case PIN_CONFIG_OUTPUT: |
| 789 | ret = abx500_gpio_direction_output(chip, offset, argument); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 790 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 791 | break; |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 792 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 793 | default: |
| 794 | dev_err(chip->dev, "illegal configuration requested\n"); |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 795 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 796 | return -EINVAL; |
| 797 | } |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 798 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 799 | return ret; |
| 800 | } |
| 801 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 802 | static const struct pinconf_ops abx500_pinconf_ops = { |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 803 | .pin_config_get = abx500_pin_config_get, |
| 804 | .pin_config_set = abx500_pin_config_set, |
| 805 | }; |
| 806 | |
| 807 | static struct pinctrl_desc abx500_pinctrl_desc = { |
| 808 | .name = "pinctrl-abx500", |
| 809 | .pctlops = &abx500_pinctrl_ops, |
| 810 | .pmxops = &abx500_pinmux_ops, |
| 811 | .confops = &abx500_pinconf_ops, |
| 812 | .owner = THIS_MODULE, |
| 813 | }; |
| 814 | |
| 815 | static int abx500_get_gpio_num(struct abx500_pinctrl_soc_data *soc) |
| 816 | { |
| 817 | unsigned int lowest = 0; |
| 818 | unsigned int highest = 0; |
| 819 | unsigned int npins = 0; |
| 820 | int i; |
| 821 | |
| 822 | /* |
| 823 | * Compute number of GPIOs from the last SoC gpio range descriptors |
| 824 | * These ranges may include "holes" but the GPIO number space shall |
| 825 | * still be homogeneous, so we need to detect and account for any |
| 826 | * such holes so that these are included in the number of GPIO pins. |
| 827 | */ |
| 828 | for (i = 0; i < soc->gpio_num_ranges; i++) { |
| 829 | unsigned gstart; |
| 830 | unsigned gend; |
| 831 | const struct abx500_pinrange *p; |
| 832 | |
| 833 | p = &soc->gpio_ranges[i]; |
| 834 | gstart = p->offset; |
| 835 | gend = p->offset + p->npins - 1; |
| 836 | |
| 837 | if (i == 0) { |
| 838 | /* First iteration, set start values */ |
| 839 | lowest = gstart; |
| 840 | highest = gend; |
| 841 | } else { |
| 842 | if (gstart < lowest) |
| 843 | lowest = gstart; |
| 844 | if (gend > highest) |
| 845 | highest = gend; |
| 846 | } |
| 847 | } |
| 848 | /* this gives the absolute number of pins */ |
| 849 | npins = highest - lowest + 1; |
| 850 | return npins; |
| 851 | } |
| 852 | |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 853 | static const struct of_device_id abx500_gpio_match[] = { |
| 854 | { .compatible = "stericsson,ab8500-gpio", .data = (void *)PINCTRL_AB8500, }, |
| 855 | { .compatible = "stericsson,ab8505-gpio", .data = (void *)PINCTRL_AB8505, }, |
| 856 | { .compatible = "stericsson,ab8540-gpio", .data = (void *)PINCTRL_AB8540, }, |
| 857 | { .compatible = "stericsson,ab9540-gpio", .data = (void *)PINCTRL_AB9540, }, |
Axel Lin | e392971 | 2013-02-17 21:58:47 +0800 | [diff] [blame] | 858 | { } |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 859 | }; |
| 860 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 861 | static int abx500_gpio_probe(struct platform_device *pdev) |
| 862 | { |
| 863 | struct ab8500_platform_data *abx500_pdata = |
| 864 | dev_get_platdata(pdev->dev.parent); |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 865 | struct abx500_gpio_platform_data *pdata = NULL; |
| 866 | struct device_node *np = pdev->dev.of_node; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 867 | struct abx500_pinctrl *pct; |
| 868 | const struct platform_device_id *platid = platform_get_device_id(pdev); |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 869 | unsigned int id = -1; |
Lee Jones | fa1ec99 | 2013-01-31 11:06:33 +0000 | [diff] [blame] | 870 | int ret, err; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 871 | int i; |
| 872 | |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 873 | if (abx500_pdata) |
| 874 | pdata = abx500_pdata->gpio; |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 875 | |
Lee Jones | 86c976e | 2013-05-08 14:29:08 +0100 | [diff] [blame] | 876 | if (!(pdata || np)) { |
| 877 | dev_err(&pdev->dev, "gpio dt and platform data missing\n"); |
| 878 | return -ENODEV; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | pct = devm_kzalloc(&pdev->dev, sizeof(struct abx500_pinctrl), |
| 882 | GFP_KERNEL); |
| 883 | if (pct == NULL) { |
| 884 | dev_err(&pdev->dev, |
| 885 | "failed to allocate memory for pct\n"); |
| 886 | return -ENOMEM; |
| 887 | } |
| 888 | |
| 889 | pct->dev = &pdev->dev; |
| 890 | pct->parent = dev_get_drvdata(pdev->dev.parent); |
| 891 | pct->chip = abx500gpio_chip; |
| 892 | pct->chip.dev = &pdev->dev; |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 893 | pct->chip.base = (np) ? -1 : pdata->gpio_base; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 894 | |
Lee Jones | 86c976e | 2013-05-08 14:29:08 +0100 | [diff] [blame] | 895 | if (platid) |
| 896 | id = platid->driver_data; |
| 897 | else if (np) { |
| 898 | const struct of_device_id *match; |
| 899 | |
| 900 | match = of_match_device(abx500_gpio_match, &pdev->dev); |
| 901 | if (match) |
| 902 | id = (unsigned long)match->data; |
| 903 | } |
| 904 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 905 | /* Poke in other ASIC variants here */ |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 906 | switch (id) { |
Patrice Chotard | 3c93799 | 2013-01-08 10:59:53 +0100 | [diff] [blame] | 907 | case PINCTRL_AB8500: |
| 908 | abx500_pinctrl_ab8500_init(&pct->soc); |
| 909 | break; |
Patrice Chotard | a8f96e4 | 2013-01-28 14:35:19 +0100 | [diff] [blame] | 910 | case PINCTRL_AB8540: |
| 911 | abx500_pinctrl_ab8540_init(&pct->soc); |
| 912 | break; |
Patrice Chotard | 09dbec3 | 2013-01-28 14:29:35 +0100 | [diff] [blame] | 913 | case PINCTRL_AB9540: |
| 914 | abx500_pinctrl_ab9540_init(&pct->soc); |
| 915 | break; |
Patrice Chotard | 1aa2d8d | 2013-01-28 14:23:45 +0100 | [diff] [blame] | 916 | case PINCTRL_AB8505: |
| 917 | abx500_pinctrl_ab8505_init(&pct->soc); |
| 918 | break; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 919 | default: |
Lee Jones | 2fcad12 | 2013-05-08 14:29:07 +0100 | [diff] [blame] | 920 | dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n", id); |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 921 | return -EINVAL; |
| 922 | } |
| 923 | |
| 924 | if (!pct->soc) { |
| 925 | dev_err(&pdev->dev, "Invalid SOC data\n"); |
| 926 | return -EINVAL; |
| 927 | } |
| 928 | |
| 929 | pct->chip.ngpio = abx500_get_gpio_num(pct->soc); |
| 930 | pct->irq_cluster = pct->soc->gpio_irq_cluster; |
| 931 | pct->irq_cluster_size = pct->soc->ngpio_irq_cluster; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 932 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 933 | ret = gpiochip_add(&pct->chip); |
| 934 | if (ret) { |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 935 | dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); |
Lee Jones | ac652d7 | 2013-01-31 10:43:00 +0000 | [diff] [blame] | 936 | return ret; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 937 | } |
| 938 | dev_info(&pdev->dev, "added gpiochip\n"); |
| 939 | |
| 940 | abx500_pinctrl_desc.pins = pct->soc->pins; |
| 941 | abx500_pinctrl_desc.npins = pct->soc->npins; |
| 942 | pct->pctldev = pinctrl_register(&abx500_pinctrl_desc, &pdev->dev, pct); |
| 943 | if (!pct->pctldev) { |
| 944 | dev_err(&pdev->dev, |
| 945 | "could not register abx500 pinctrl driver\n"); |
Lee Jones | fa1ec99 | 2013-01-31 11:06:33 +0000 | [diff] [blame] | 946 | ret = -EINVAL; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 947 | goto out_rem_chip; |
| 948 | } |
| 949 | dev_info(&pdev->dev, "registered pin controller\n"); |
| 950 | |
| 951 | /* We will handle a range of GPIO pins */ |
| 952 | for (i = 0; i < pct->soc->gpio_num_ranges; i++) { |
| 953 | const struct abx500_pinrange *p = &pct->soc->gpio_ranges[i]; |
| 954 | |
| 955 | ret = gpiochip_add_pin_range(&pct->chip, |
| 956 | dev_name(&pdev->dev), |
| 957 | p->offset - 1, p->offset, p->npins); |
| 958 | if (ret < 0) |
Lee Jones | fa1ec99 | 2013-01-31 11:06:33 +0000 | [diff] [blame] | 959 | goto out_rem_chip; |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | platform_set_drvdata(pdev, pct); |
| 963 | dev_info(&pdev->dev, "initialized abx500 pinctrl driver\n"); |
| 964 | |
| 965 | return 0; |
| 966 | |
| 967 | out_rem_chip: |
Lee Jones | fa1ec99 | 2013-01-31 11:06:33 +0000 | [diff] [blame] | 968 | err = gpiochip_remove(&pct->chip); |
| 969 | if (err) |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 970 | dev_info(&pdev->dev, "failed to remove gpiochip\n"); |
Lee Jones | ac652d7 | 2013-01-31 10:43:00 +0000 | [diff] [blame] | 971 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 972 | return ret; |
| 973 | } |
| 974 | |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 975 | /** |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 976 | * abx500_gpio_remove() - remove Ab8500-gpio driver |
Lee Jones | 83b423c | 2013-01-23 13:24:08 +0000 | [diff] [blame] | 977 | * @pdev: Platform device registered |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 978 | */ |
| 979 | static int abx500_gpio_remove(struct platform_device *pdev) |
| 980 | { |
| 981 | struct abx500_pinctrl *pct = platform_get_drvdata(pdev); |
| 982 | int ret; |
| 983 | |
| 984 | ret = gpiochip_remove(&pct->chip); |
| 985 | if (ret < 0) { |
| 986 | dev_err(pct->dev, "unable to remove gpiochip: %d\n", |
| 987 | ret); |
| 988 | return ret; |
| 989 | } |
| 990 | |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 991 | return 0; |
| 992 | } |
| 993 | |
| 994 | static const struct platform_device_id abx500_pinctrl_id[] = { |
| 995 | { "pinctrl-ab8500", PINCTRL_AB8500 }, |
| 996 | { "pinctrl-ab8540", PINCTRL_AB8540 }, |
| 997 | { "pinctrl-ab9540", PINCTRL_AB9540 }, |
| 998 | { "pinctrl-ab8505", PINCTRL_AB8505 }, |
| 999 | { }, |
| 1000 | }; |
| 1001 | |
| 1002 | static struct platform_driver abx500_gpio_driver = { |
| 1003 | .driver = { |
| 1004 | .name = "abx500-gpio", |
| 1005 | .owner = THIS_MODULE, |
Lee Jones | f30a383 | 2013-01-31 11:07:40 +0000 | [diff] [blame] | 1006 | .of_match_table = abx500_gpio_match, |
Patrice Chotard | 0493e64 | 2013-01-08 10:41:02 +0100 | [diff] [blame] | 1007 | }, |
| 1008 | .probe = abx500_gpio_probe, |
| 1009 | .remove = abx500_gpio_remove, |
| 1010 | .id_table = abx500_pinctrl_id, |
| 1011 | }; |
| 1012 | |
| 1013 | static int __init abx500_gpio_init(void) |
| 1014 | { |
| 1015 | return platform_driver_register(&abx500_gpio_driver); |
| 1016 | } |
| 1017 | core_initcall(abx500_gpio_init); |
| 1018 | |
| 1019 | MODULE_AUTHOR("Patrice Chotard <patrice.chotard@st.com>"); |
| 1020 | MODULE_DESCRIPTION("Driver allows to use AxB5xx unused pins to be used as GPIO"); |
| 1021 | MODULE_ALIAS("platform:abx500-gpio"); |
| 1022 | MODULE_LICENSE("GPL v2"); |