Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1 | /* |
| 2 | * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver. |
| 3 | * Copyright (c) 2014 MediaTek Inc. |
| 4 | * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/io.h> |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 17 | #include <linux/gpio/driver.h> |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/of.h> |
| 20 | #include <linux/of_address.h> |
| 21 | #include <linux/of_device.h> |
| 22 | #include <linux/of_irq.h> |
| 23 | #include <linux/pinctrl/consumer.h> |
| 24 | #include <linux/pinctrl/machine.h> |
| 25 | #include <linux/pinctrl/pinconf.h> |
| 26 | #include <linux/pinctrl/pinconf-generic.h> |
| 27 | #include <linux/pinctrl/pinctrl.h> |
| 28 | #include <linux/pinctrl/pinmux.h> |
| 29 | #include <linux/platform_device.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/bitops.h> |
| 32 | #include <linux/regmap.h> |
| 33 | #include <linux/mfd/syscon.h> |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 34 | #include <linux/delay.h> |
Hongzhou Yang | 30f010f | 2015-01-27 15:13:55 +0800 | [diff] [blame] | 35 | #include <linux/interrupt.h> |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 36 | #include <linux/pm.h> |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 37 | #include <dt-bindings/pinctrl/mt65xx.h> |
| 38 | |
| 39 | #include "../core.h" |
| 40 | #include "../pinconf.h" |
| 41 | #include "../pinctrl-utils.h" |
| 42 | #include "pinctrl-mtk-common.h" |
| 43 | |
| 44 | #define MAX_GPIO_MODE_PER_REG 5 |
| 45 | #define GPIO_MODE_BITS 3 |
Biao Huang | 59ee9c9 | 2016-02-03 09:24:46 +0800 | [diff] [blame] | 46 | #define GPIO_MODE_PREFIX "GPIO" |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 47 | |
| 48 | static const char * const mtk_gpio_functions[] = { |
| 49 | "func0", "func1", "func2", "func3", |
| 50 | "func4", "func5", "func6", "func7", |
Biao Huang | 148b95e | 2016-01-27 09:24:42 +0800 | [diff] [blame] | 51 | "func8", "func9", "func10", "func11", |
| 52 | "func12", "func13", "func14", "func15", |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 53 | }; |
| 54 | |
| 55 | /* |
| 56 | * There are two base address for pull related configuration |
| 57 | * in mt8135, and different GPIO pins use different base address. |
| 58 | * When pin number greater than type1_start and less than type1_end, |
| 59 | * should use the second base address. |
| 60 | */ |
| 61 | static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl, |
| 62 | unsigned long pin) |
| 63 | { |
| 64 | if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end) |
| 65 | return pctl->regmap2; |
| 66 | return pctl->regmap1; |
| 67 | } |
| 68 | |
| 69 | static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin) |
| 70 | { |
| 71 | /* Different SoC has different mask and port shift. */ |
| 72 | return ((pin >> 4) & pctl->devdata->port_mask) |
| 73 | << pctl->devdata->port_shf; |
| 74 | } |
| 75 | |
| 76 | static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 77 | struct pinctrl_gpio_range *range, unsigned offset, |
| 78 | bool input) |
| 79 | { |
| 80 | unsigned int reg_addr; |
| 81 | unsigned int bit; |
| 82 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 83 | |
| 84 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; |
| 85 | bit = BIT(offset & 0xf); |
| 86 | |
Biao Huang | 148b95e | 2016-01-27 09:24:42 +0800 | [diff] [blame] | 87 | if (pctl->devdata->spec_dir_set) |
| 88 | pctl->devdata->spec_dir_set(®_addr, offset); |
| 89 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 90 | if (input) |
| 91 | /* Different SoC has different alignment offset. */ |
| 92 | reg_addr = CLR_ADDR(reg_addr, pctl); |
| 93 | else |
| 94 | reg_addr = SET_ADDR(reg_addr, pctl); |
| 95 | |
| 96 | regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
| 101 | { |
| 102 | unsigned int reg_addr; |
| 103 | unsigned int bit; |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 104 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 105 | |
| 106 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset; |
| 107 | bit = BIT(offset & 0xf); |
| 108 | |
| 109 | if (value) |
| 110 | reg_addr = SET_ADDR(reg_addr, pctl); |
| 111 | else |
| 112 | reg_addr = CLR_ADDR(reg_addr, pctl); |
| 113 | |
| 114 | regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); |
| 115 | } |
| 116 | |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 117 | static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin, |
| 118 | int value, enum pin_config_param arg) |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 119 | { |
| 120 | unsigned int reg_addr, offset; |
| 121 | unsigned int bit; |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 122 | |
| 123 | /** |
| 124 | * Due to some soc are not support ies/smt config, add this special |
| 125 | * control to handle it. |
| 126 | */ |
| 127 | if (!pctl->devdata->spec_ies_smt_set && |
| 128 | pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT && |
| 129 | arg == PIN_CONFIG_INPUT_ENABLE) |
| 130 | return -EINVAL; |
| 131 | |
| 132 | if (!pctl->devdata->spec_ies_smt_set && |
| 133 | pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT && |
| 134 | arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE) |
| 135 | return -EINVAL; |
Hongzhou Yang | 30f010f | 2015-01-27 15:13:55 +0800 | [diff] [blame] | 136 | |
| 137 | /* |
| 138 | * Due to some pins are irregular, their input enable and smt |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 139 | * control register are discontinuous, so we need this special handle. |
Hongzhou Yang | 30f010f | 2015-01-27 15:13:55 +0800 | [diff] [blame] | 140 | */ |
| 141 | if (pctl->devdata->spec_ies_smt_set) { |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 142 | return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin), |
| 143 | pin, pctl->devdata->port_align, value, arg); |
Hongzhou Yang | 30f010f | 2015-01-27 15:13:55 +0800 | [diff] [blame] | 144 | } |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 145 | |
| 146 | bit = BIT(pin & 0xf); |
| 147 | |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 148 | if (arg == PIN_CONFIG_INPUT_ENABLE) |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 149 | offset = pctl->devdata->ies_offset; |
| 150 | else |
| 151 | offset = pctl->devdata->smt_offset; |
| 152 | |
| 153 | if (value) |
| 154 | reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl); |
| 155 | else |
| 156 | reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl); |
| 157 | |
| 158 | regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit); |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap, |
| 163 | const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num, |
| 164 | unsigned int pin, unsigned char align, int value) |
| 165 | { |
| 166 | unsigned int i, reg_addr, bit; |
| 167 | |
| 168 | for (i = 0; i < info_num; i++) { |
| 169 | if (pin >= ies_smt_infos[i].start && |
| 170 | pin <= ies_smt_infos[i].end) { |
| 171 | break; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | if (i == info_num) |
| 176 | return -EINVAL; |
| 177 | |
| 178 | if (value) |
| 179 | reg_addr = ies_smt_infos[i].offset + align; |
| 180 | else |
| 181 | reg_addr = ies_smt_infos[i].offset + (align << 1); |
| 182 | |
| 183 | bit = BIT(ies_smt_infos[i].bit); |
| 184 | regmap_write(regmap, reg_addr, bit); |
| 185 | return 0; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin( |
| 189 | struct mtk_pinctrl *pctl, unsigned long pin) { |
| 190 | int i; |
| 191 | |
| 192 | for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) { |
| 193 | const struct mtk_pin_drv_grp *pin_drv = |
| 194 | pctl->devdata->pin_drv_grp + i; |
| 195 | if (pin == pin_drv->pin) |
| 196 | return pin_drv; |
| 197 | } |
| 198 | |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl, |
| 203 | unsigned int pin, unsigned char driving) |
| 204 | { |
| 205 | const struct mtk_pin_drv_grp *pin_drv; |
| 206 | unsigned int val; |
| 207 | unsigned int bits, mask, shift; |
| 208 | const struct mtk_drv_group_desc *drv_grp; |
| 209 | |
| 210 | if (pin >= pctl->devdata->npins) |
| 211 | return -EINVAL; |
| 212 | |
| 213 | pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin); |
| 214 | if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls) |
| 215 | return -EINVAL; |
| 216 | |
| 217 | drv_grp = pctl->devdata->grp_desc + pin_drv->grp; |
| 218 | if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv |
| 219 | && !(driving % drv_grp->step)) { |
| 220 | val = driving / drv_grp->step - 1; |
| 221 | bits = drv_grp->high_bit - drv_grp->low_bit + 1; |
| 222 | mask = BIT(bits) - 1; |
| 223 | shift = pin_drv->bit + drv_grp->low_bit; |
| 224 | mask <<= shift; |
| 225 | val <<= shift; |
| 226 | return regmap_update_bits(mtk_get_regmap(pctl, pin), |
| 227 | pin_drv->offset, mask, val); |
| 228 | } |
| 229 | |
| 230 | return -EINVAL; |
| 231 | } |
| 232 | |
Yingjoe Chen | e73fe27 | 2015-05-18 23:11:15 -0700 | [diff] [blame] | 233 | int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap, |
| 234 | const struct mtk_pin_spec_pupd_set_samereg *pupd_infos, |
| 235 | unsigned int info_num, unsigned int pin, |
| 236 | unsigned char align, bool isup, unsigned int r1r0) |
| 237 | { |
| 238 | unsigned int i; |
| 239 | unsigned int reg_pupd, reg_set, reg_rst; |
| 240 | unsigned int bit_pupd, bit_r0, bit_r1; |
| 241 | const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin; |
| 242 | bool find = false; |
| 243 | |
| 244 | for (i = 0; i < info_num; i++) { |
| 245 | if (pin == pupd_infos[i].pin) { |
| 246 | find = true; |
| 247 | break; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (!find) |
| 252 | return -EINVAL; |
| 253 | |
| 254 | spec_pupd_pin = pupd_infos + i; |
| 255 | reg_set = spec_pupd_pin->offset + align; |
| 256 | reg_rst = spec_pupd_pin->offset + (align << 1); |
| 257 | |
| 258 | if (isup) |
| 259 | reg_pupd = reg_rst; |
| 260 | else |
| 261 | reg_pupd = reg_set; |
| 262 | |
| 263 | bit_pupd = BIT(spec_pupd_pin->pupd_bit); |
| 264 | regmap_write(regmap, reg_pupd, bit_pupd); |
| 265 | |
| 266 | bit_r0 = BIT(spec_pupd_pin->r0_bit); |
| 267 | bit_r1 = BIT(spec_pupd_pin->r1_bit); |
| 268 | |
| 269 | switch (r1r0) { |
| 270 | case MTK_PUPD_SET_R1R0_00: |
| 271 | regmap_write(regmap, reg_rst, bit_r0); |
| 272 | regmap_write(regmap, reg_rst, bit_r1); |
| 273 | break; |
| 274 | case MTK_PUPD_SET_R1R0_01: |
| 275 | regmap_write(regmap, reg_set, bit_r0); |
| 276 | regmap_write(regmap, reg_rst, bit_r1); |
| 277 | break; |
| 278 | case MTK_PUPD_SET_R1R0_10: |
| 279 | regmap_write(regmap, reg_rst, bit_r0); |
| 280 | regmap_write(regmap, reg_set, bit_r1); |
| 281 | break; |
| 282 | case MTK_PUPD_SET_R1R0_11: |
| 283 | regmap_write(regmap, reg_set, bit_r0); |
| 284 | regmap_write(regmap, reg_set, bit_r1); |
| 285 | break; |
| 286 | default: |
| 287 | return -EINVAL; |
| 288 | } |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 293 | static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl, |
| 294 | unsigned int pin, bool enable, bool isup, unsigned int arg) |
| 295 | { |
| 296 | unsigned int bit; |
| 297 | unsigned int reg_pullen, reg_pullsel; |
| 298 | int ret; |
| 299 | |
| 300 | /* Some pins' pull setting are very different, |
| 301 | * they have separate pull up/down bit, R0 and R1 |
| 302 | * resistor bit, so we need this special handle. |
| 303 | */ |
| 304 | if (pctl->devdata->spec_pull_set) { |
| 305 | ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin), |
| 306 | pin, pctl->devdata->port_align, isup, arg); |
| 307 | if (!ret) |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | /* For generic pull config, default arg value should be 0 or 1. */ |
| 312 | if (arg != 0 && arg != 1) { |
| 313 | dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n", |
| 314 | arg, pin); |
| 315 | return -EINVAL; |
| 316 | } |
| 317 | |
| 318 | bit = BIT(pin & 0xf); |
| 319 | if (enable) |
| 320 | reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) + |
| 321 | pctl->devdata->pullen_offset, pctl); |
| 322 | else |
| 323 | reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) + |
| 324 | pctl->devdata->pullen_offset, pctl); |
| 325 | |
| 326 | if (isup) |
| 327 | reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) + |
| 328 | pctl->devdata->pullsel_offset, pctl); |
| 329 | else |
| 330 | reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) + |
| 331 | pctl->devdata->pullsel_offset, pctl); |
| 332 | |
| 333 | regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit); |
| 334 | regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit); |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev, |
| 339 | unsigned int pin, enum pin_config_param param, |
| 340 | enum pin_config_param arg) |
| 341 | { |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 342 | int ret = 0; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 343 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 344 | |
| 345 | switch (param) { |
| 346 | case PIN_CONFIG_BIAS_DISABLE: |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 347 | ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 348 | break; |
| 349 | case PIN_CONFIG_BIAS_PULL_UP: |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 350 | ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 351 | break; |
| 352 | case PIN_CONFIG_BIAS_PULL_DOWN: |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 353 | ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 354 | break; |
| 355 | case PIN_CONFIG_INPUT_ENABLE: |
Biao Huang | eceb3e6 | 2016-02-03 09:24:45 +0800 | [diff] [blame] | 356 | mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 357 | ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 358 | break; |
| 359 | case PIN_CONFIG_OUTPUT: |
| 360 | mtk_gpio_set(pctl->chip, pin, arg); |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 361 | ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 362 | break; |
| 363 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
Biao Huang | eceb3e6 | 2016-02-03 09:24:45 +0800 | [diff] [blame] | 364 | mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 365 | ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 366 | break; |
| 367 | case PIN_CONFIG_DRIVE_STRENGTH: |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 368 | ret = mtk_pconf_set_driving(pctl, pin, arg); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 369 | break; |
| 370 | default: |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 371 | ret = -EINVAL; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 372 | } |
| 373 | |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 374 | return ret; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, |
| 378 | unsigned group, |
| 379 | unsigned long *config) |
| 380 | { |
| 381 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 382 | |
| 383 | *config = pctl->groups[group].config; |
| 384 | |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, |
| 389 | unsigned long *configs, unsigned num_configs) |
| 390 | { |
| 391 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 392 | struct mtk_pinctrl_group *g = &pctl->groups[group]; |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 393 | int i, ret; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 394 | |
| 395 | for (i = 0; i < num_configs; i++) { |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 396 | ret = mtk_pconf_parse_conf(pctldev, g->pin, |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 397 | pinconf_to_config_param(configs[i]), |
| 398 | pinconf_to_config_argument(configs[i])); |
Hongzhou Yang | 25d76b2 | 2015-05-18 23:11:16 -0700 | [diff] [blame] | 399 | if (ret < 0) |
| 400 | return ret; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 401 | |
| 402 | g->config = configs[i]; |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
| 408 | static const struct pinconf_ops mtk_pconf_ops = { |
| 409 | .pin_config_group_get = mtk_pconf_group_get, |
| 410 | .pin_config_group_set = mtk_pconf_group_set, |
| 411 | }; |
| 412 | |
| 413 | static struct mtk_pinctrl_group * |
| 414 | mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin) |
| 415 | { |
| 416 | int i; |
| 417 | |
| 418 | for (i = 0; i < pctl->ngroups; i++) { |
| 419 | struct mtk_pinctrl_group *grp = pctl->groups + i; |
| 420 | |
| 421 | if (grp->pin == pin) |
| 422 | return grp; |
| 423 | } |
| 424 | |
| 425 | return NULL; |
| 426 | } |
| 427 | |
| 428 | static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin( |
| 429 | struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum) |
| 430 | { |
| 431 | const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num; |
| 432 | const struct mtk_desc_function *func = pin->functions; |
| 433 | |
| 434 | while (func && func->name) { |
| 435 | if (func->muxval == fnum) |
| 436 | return func; |
| 437 | func++; |
| 438 | } |
| 439 | |
| 440 | return NULL; |
| 441 | } |
| 442 | |
| 443 | static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl, |
| 444 | u32 pin_num, u32 fnum) |
| 445 | { |
| 446 | int i; |
| 447 | |
| 448 | for (i = 0; i < pctl->devdata->npins; i++) { |
| 449 | const struct mtk_desc_pin *pin = pctl->devdata->pins + i; |
| 450 | |
| 451 | if (pin->pin.number == pin_num) { |
| 452 | const struct mtk_desc_function *func = |
| 453 | pin->functions; |
| 454 | |
| 455 | while (func && func->name) { |
| 456 | if (func->muxval == fnum) |
| 457 | return true; |
| 458 | func++; |
| 459 | } |
| 460 | |
| 461 | break; |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | return false; |
| 466 | } |
| 467 | |
| 468 | static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, |
| 469 | u32 pin, u32 fnum, struct mtk_pinctrl_group *grp, |
| 470 | struct pinctrl_map **map, unsigned *reserved_maps, |
| 471 | unsigned *num_maps) |
| 472 | { |
| 473 | bool ret; |
| 474 | |
| 475 | if (*num_maps == *reserved_maps) |
| 476 | return -ENOSPC; |
| 477 | |
| 478 | (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; |
| 479 | (*map)[*num_maps].data.mux.group = grp->name; |
| 480 | |
| 481 | ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); |
| 482 | if (!ret) { |
| 483 | dev_err(pctl->dev, "invalid function %d on pin %d .\n", |
| 484 | fnum, pin); |
| 485 | return -EINVAL; |
| 486 | } |
| 487 | |
| 488 | (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; |
| 489 | (*num_maps)++; |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, |
| 495 | struct device_node *node, |
| 496 | struct pinctrl_map **map, |
| 497 | unsigned *reserved_maps, |
| 498 | unsigned *num_maps) |
| 499 | { |
| 500 | struct property *pins; |
| 501 | u32 pinfunc, pin, func; |
| 502 | int num_pins, num_funcs, maps_per_pin; |
| 503 | unsigned long *configs; |
| 504 | unsigned int num_configs; |
| 505 | bool has_config = 0; |
| 506 | int i, err; |
| 507 | unsigned reserve = 0; |
| 508 | struct mtk_pinctrl_group *grp; |
| 509 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 510 | |
| 511 | pins = of_find_property(node, "pinmux", NULL); |
| 512 | if (!pins) { |
| 513 | dev_err(pctl->dev, "missing pins property in node %s .\n", |
| 514 | node->name); |
| 515 | return -EINVAL; |
| 516 | } |
| 517 | |
Hongzhou Yang | c445cac | 2015-02-11 23:56:11 -0800 | [diff] [blame] | 518 | err = pinconf_generic_parse_dt_config(node, pctldev, &configs, |
| 519 | &num_configs); |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 520 | if (err) |
| 521 | return err; |
| 522 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 523 | if (num_configs) |
| 524 | has_config = 1; |
| 525 | |
| 526 | num_pins = pins->length / sizeof(u32); |
| 527 | num_funcs = num_pins; |
| 528 | maps_per_pin = 0; |
| 529 | if (num_funcs) |
| 530 | maps_per_pin++; |
| 531 | if (has_config && num_pins >= 1) |
| 532 | maps_per_pin++; |
| 533 | |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 534 | if (!num_pins || !maps_per_pin) { |
| 535 | err = -EINVAL; |
| 536 | goto exit; |
| 537 | } |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 538 | |
| 539 | reserve = num_pins * maps_per_pin; |
| 540 | |
| 541 | err = pinctrl_utils_reserve_map(pctldev, map, |
| 542 | reserved_maps, num_maps, reserve); |
| 543 | if (err < 0) |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 544 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 545 | |
| 546 | for (i = 0; i < num_pins; i++) { |
| 547 | err = of_property_read_u32_index(node, "pinmux", |
| 548 | i, &pinfunc); |
| 549 | if (err) |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 550 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 551 | |
| 552 | pin = MTK_GET_PIN_NO(pinfunc); |
| 553 | func = MTK_GET_PIN_FUNC(pinfunc); |
| 554 | |
| 555 | if (pin >= pctl->devdata->npins || |
| 556 | func >= ARRAY_SIZE(mtk_gpio_functions)) { |
| 557 | dev_err(pctl->dev, "invalid pins value.\n"); |
| 558 | err = -EINVAL; |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 559 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | grp = mtk_pctrl_find_group_by_pin(pctl, pin); |
| 563 | if (!grp) { |
| 564 | dev_err(pctl->dev, "unable to match pin %d to group\n", |
| 565 | pin); |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 566 | err = -EINVAL; |
| 567 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map, |
| 571 | reserved_maps, num_maps); |
| 572 | if (err < 0) |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 573 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 574 | |
| 575 | if (has_config) { |
| 576 | err = pinctrl_utils_add_map_configs(pctldev, map, |
| 577 | reserved_maps, num_maps, grp->name, |
| 578 | configs, num_configs, |
| 579 | PIN_MAP_TYPE_CONFIGS_GROUP); |
| 580 | if (err < 0) |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 581 | goto exit; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 582 | } |
| 583 | } |
| 584 | |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 585 | err = 0; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 586 | |
Hongzhou Yang | b04a23b | 2015-11-17 14:33:41 -0800 | [diff] [blame] | 587 | exit: |
| 588 | kfree(configs); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 589 | return err; |
| 590 | } |
| 591 | |
| 592 | static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 593 | struct device_node *np_config, |
| 594 | struct pinctrl_map **map, unsigned *num_maps) |
| 595 | { |
| 596 | struct device_node *np; |
| 597 | unsigned reserved_maps; |
| 598 | int ret; |
| 599 | |
| 600 | *map = NULL; |
| 601 | *num_maps = 0; |
| 602 | reserved_maps = 0; |
| 603 | |
| 604 | for_each_child_of_node(np_config, np) { |
| 605 | ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, |
| 606 | &reserved_maps, num_maps); |
| 607 | if (ret < 0) { |
Irina Tirdea | d32f7fd | 2016-03-31 14:44:42 +0300 | [diff] [blame] | 608 | pinctrl_utils_free_map(pctldev, *map, *num_maps); |
Julia Lawall | 4fc8a4b | 2015-12-21 17:39:48 +0100 | [diff] [blame] | 609 | of_node_put(np); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 610 | return ret; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | return 0; |
| 615 | } |
| 616 | |
| 617 | static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) |
| 618 | { |
| 619 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 620 | |
| 621 | return pctl->ngroups; |
| 622 | } |
| 623 | |
| 624 | static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, |
| 625 | unsigned group) |
| 626 | { |
| 627 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 628 | |
| 629 | return pctl->groups[group].name; |
| 630 | } |
| 631 | |
| 632 | static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, |
| 633 | unsigned group, |
| 634 | const unsigned **pins, |
| 635 | unsigned *num_pins) |
| 636 | { |
| 637 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 638 | |
| 639 | *pins = (unsigned *)&pctl->groups[group].pin; |
| 640 | *num_pins = 1; |
| 641 | |
| 642 | return 0; |
| 643 | } |
| 644 | |
| 645 | static const struct pinctrl_ops mtk_pctrl_ops = { |
| 646 | .dt_node_to_map = mtk_pctrl_dt_node_to_map, |
Irina Tirdea | d32f7fd | 2016-03-31 14:44:42 +0300 | [diff] [blame] | 647 | .dt_free_map = pinctrl_utils_free_map, |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 648 | .get_groups_count = mtk_pctrl_get_groups_count, |
| 649 | .get_group_name = mtk_pctrl_get_group_name, |
| 650 | .get_group_pins = mtk_pctrl_get_group_pins, |
| 651 | }; |
| 652 | |
| 653 | static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) |
| 654 | { |
| 655 | return ARRAY_SIZE(mtk_gpio_functions); |
| 656 | } |
| 657 | |
| 658 | static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, |
| 659 | unsigned selector) |
| 660 | { |
| 661 | return mtk_gpio_functions[selector]; |
| 662 | } |
| 663 | |
| 664 | static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, |
| 665 | unsigned function, |
| 666 | const char * const **groups, |
| 667 | unsigned * const num_groups) |
| 668 | { |
| 669 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 670 | |
| 671 | *groups = pctl->grp_names; |
| 672 | *num_groups = pctl->ngroups; |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev, |
| 678 | unsigned long pin, unsigned long mode) |
| 679 | { |
| 680 | unsigned int reg_addr; |
| 681 | unsigned char bit; |
| 682 | unsigned int val; |
| 683 | unsigned int mask = (1L << GPIO_MODE_BITS) - 1; |
| 684 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 685 | |
Biao Huang | 148b95e | 2016-01-27 09:24:42 +0800 | [diff] [blame] | 686 | if (pctl->devdata->spec_pinmux_set) |
| 687 | pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin), |
| 688 | pin, mode); |
| 689 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 690 | reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf) |
| 691 | + pctl->devdata->pinmux_offset; |
| 692 | |
Biao Huang | 148b95e | 2016-01-27 09:24:42 +0800 | [diff] [blame] | 693 | mode &= mask; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 694 | bit = pin % MAX_GPIO_MODE_PER_REG; |
| 695 | mask <<= (GPIO_MODE_BITS * bit); |
| 696 | val = (mode << (GPIO_MODE_BITS * bit)); |
| 697 | return regmap_update_bits(mtk_get_regmap(pctl, pin), |
| 698 | reg_addr, mask, val); |
| 699 | } |
| 700 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 701 | static const struct mtk_desc_pin * |
| 702 | mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num) |
| 703 | { |
| 704 | int i; |
| 705 | const struct mtk_desc_pin *pin; |
| 706 | |
| 707 | for (i = 0; i < pctl->devdata->npins; i++) { |
| 708 | pin = pctl->devdata->pins + i; |
| 709 | if (pin->eint.eintnum == eint_num) |
| 710 | return pin; |
| 711 | } |
| 712 | |
| 713 | return NULL; |
| 714 | } |
| 715 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 716 | static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, |
| 717 | unsigned function, |
| 718 | unsigned group) |
| 719 | { |
| 720 | bool ret; |
| 721 | const struct mtk_desc_function *desc; |
| 722 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 723 | struct mtk_pinctrl_group *g = pctl->groups + group; |
| 724 | |
| 725 | ret = mtk_pctrl_is_function_valid(pctl, g->pin, function); |
| 726 | if (!ret) { |
Colin Ian King | c70336c | 2015-08-03 00:10:45 +0100 | [diff] [blame] | 727 | dev_err(pctl->dev, "invalid function %d on group %d .\n", |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 728 | function, group); |
| 729 | return -EINVAL; |
| 730 | } |
| 731 | |
| 732 | desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function); |
| 733 | if (!desc) |
| 734 | return -EINVAL; |
| 735 | mtk_pmx_set_mode(pctldev, g->pin, desc->muxval); |
| 736 | return 0; |
| 737 | } |
| 738 | |
Biao Huang | 59ee9c9 | 2016-02-03 09:24:46 +0800 | [diff] [blame] | 739 | static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl, |
| 740 | unsigned offset) |
| 741 | { |
| 742 | const struct mtk_desc_pin *pin = pctl->devdata->pins + offset; |
| 743 | const struct mtk_desc_function *func = pin->functions; |
| 744 | |
| 745 | while (func && func->name) { |
| 746 | if (!strncmp(func->name, GPIO_MODE_PREFIX, |
| 747 | sizeof(GPIO_MODE_PREFIX)-1)) |
| 748 | return func->muxval; |
| 749 | func++; |
| 750 | } |
| 751 | return -EINVAL; |
| 752 | } |
| 753 | |
| 754 | static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 755 | struct pinctrl_gpio_range *range, |
| 756 | unsigned offset) |
| 757 | { |
Andrzej Hajda | 740f5b0 | 2016-02-11 15:34:08 +0100 | [diff] [blame] | 758 | int muxval; |
Biao Huang | 59ee9c9 | 2016-02-03 09:24:46 +0800 | [diff] [blame] | 759 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 760 | |
| 761 | muxval = mtk_pmx_find_gpio_mode(pctl, offset); |
| 762 | |
| 763 | if (muxval < 0) { |
| 764 | dev_err(pctl->dev, "invalid gpio pin %d.\n", offset); |
| 765 | return -EINVAL; |
| 766 | } |
| 767 | |
| 768 | mtk_pmx_set_mode(pctldev, offset, muxval); |
Biao Huang | 31763d3 | 2016-02-17 03:16:33 +0800 | [diff] [blame] | 769 | mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE); |
Biao Huang | 59ee9c9 | 2016-02-03 09:24:46 +0800 | [diff] [blame] | 770 | |
| 771 | return 0; |
| 772 | } |
| 773 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 774 | static const struct pinmux_ops mtk_pmx_ops = { |
| 775 | .get_functions_count = mtk_pmx_get_funcs_cnt, |
| 776 | .get_function_name = mtk_pmx_get_func_name, |
| 777 | .get_function_groups = mtk_pmx_get_func_groups, |
| 778 | .set_mux = mtk_pmx_set_mux, |
| 779 | .gpio_set_direction = mtk_pmx_gpio_set_direction, |
Biao Huang | 59ee9c9 | 2016-02-03 09:24:46 +0800 | [diff] [blame] | 780 | .gpio_request_enable = mtk_pmx_gpio_request_enable, |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 781 | }; |
| 782 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 783 | static int mtk_gpio_direction_input(struct gpio_chip *chip, |
| 784 | unsigned offset) |
| 785 | { |
| 786 | return pinctrl_gpio_direction_input(chip->base + offset); |
| 787 | } |
| 788 | |
| 789 | static int mtk_gpio_direction_output(struct gpio_chip *chip, |
| 790 | unsigned offset, int value) |
| 791 | { |
| 792 | mtk_gpio_set(chip, offset, value); |
| 793 | return pinctrl_gpio_direction_output(chip->base + offset); |
| 794 | } |
| 795 | |
| 796 | static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset) |
| 797 | { |
| 798 | unsigned int reg_addr; |
| 799 | unsigned int bit; |
| 800 | unsigned int read_val = 0; |
| 801 | |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 802 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 803 | |
| 804 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; |
| 805 | bit = BIT(offset & 0xf); |
Biao Huang | 148b95e | 2016-01-27 09:24:42 +0800 | [diff] [blame] | 806 | |
| 807 | if (pctl->devdata->spec_dir_set) |
| 808 | pctl->devdata->spec_dir_set(®_addr, offset); |
| 809 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 810 | regmap_read(pctl->regmap1, reg_addr, &read_val); |
Hongzhou Yang | f97c230 | 2015-11-17 14:17:13 -0800 | [diff] [blame] | 811 | return !(read_val & bit); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 812 | } |
| 813 | |
| 814 | static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset) |
| 815 | { |
| 816 | unsigned int reg_addr; |
| 817 | unsigned int bit; |
| 818 | unsigned int read_val = 0; |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 819 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 820 | |
Hongzhou Yang | f97c230 | 2015-11-17 14:17:13 -0800 | [diff] [blame] | 821 | reg_addr = mtk_get_port(pctl, offset) + |
| 822 | pctl->devdata->din_offset; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 823 | |
| 824 | bit = BIT(offset & 0xf); |
| 825 | regmap_read(pctl->regmap1, reg_addr, &read_val); |
| 826 | return !!(read_val & bit); |
| 827 | } |
| 828 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 829 | static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
| 830 | { |
| 831 | const struct mtk_desc_pin *pin; |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 832 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 833 | int irq; |
| 834 | |
| 835 | pin = pctl->devdata->pins + offset; |
| 836 | if (pin->eint.eintnum == NO_EINT_SUPPORT) |
| 837 | return -EINVAL; |
| 838 | |
| 839 | irq = irq_find_mapping(pctl->domain, pin->eint.eintnum); |
| 840 | if (!irq) |
| 841 | return -EINVAL; |
| 842 | |
| 843 | return irq; |
| 844 | } |
| 845 | |
| 846 | static int mtk_pinctrl_irq_request_resources(struct irq_data *d) |
| 847 | { |
| 848 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 849 | const struct mtk_desc_pin *pin; |
| 850 | int ret; |
| 851 | |
| 852 | pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); |
| 853 | |
| 854 | if (!pin) { |
| 855 | dev_err(pctl->dev, "Can not find pin\n"); |
| 856 | return -EINVAL; |
| 857 | } |
| 858 | |
| 859 | ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number); |
| 860 | if (ret) { |
| 861 | dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n", |
| 862 | irqd_to_hwirq(d)); |
| 863 | return ret; |
| 864 | } |
| 865 | |
| 866 | /* set mux to INT mode */ |
| 867 | mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); |
Biao Huang | b1c5b77 | 2016-02-17 03:16:34 +0800 | [diff] [blame] | 868 | /* set gpio direction to input */ |
| 869 | mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, true); |
| 870 | /* set input-enable */ |
| 871 | mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, PIN_CONFIG_INPUT_ENABLE); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 872 | |
| 873 | return 0; |
| 874 | } |
| 875 | |
| 876 | static void mtk_pinctrl_irq_release_resources(struct irq_data *d) |
| 877 | { |
| 878 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 879 | const struct mtk_desc_pin *pin; |
| 880 | |
| 881 | pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); |
| 882 | |
| 883 | if (!pin) { |
| 884 | dev_err(pctl->dev, "Can not find pin\n"); |
| 885 | return; |
| 886 | } |
| 887 | |
| 888 | gpiochip_unlock_as_irq(pctl->chip, pin->pin.number); |
| 889 | } |
| 890 | |
| 891 | static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl, |
| 892 | unsigned int eint_num, unsigned int offset) |
| 893 | { |
| 894 | unsigned int eint_base = 0; |
| 895 | void __iomem *reg; |
| 896 | |
| 897 | if (eint_num >= pctl->devdata->ap_num) |
| 898 | eint_base = pctl->devdata->ap_num; |
| 899 | |
| 900 | reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4; |
| 901 | |
| 902 | return reg; |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not |
| 907 | * @eint_num: the EINT number to setmtk_pinctrl |
| 908 | */ |
| 909 | static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl, |
| 910 | unsigned int eint_num) |
| 911 | { |
| 912 | unsigned int sens; |
| 913 | unsigned int bit = BIT(eint_num % 32); |
| 914 | const struct mtk_eint_offsets *eint_offsets = |
| 915 | &pctl->devdata->eint_offsets; |
| 916 | |
| 917 | void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, |
| 918 | eint_offsets->sens); |
| 919 | |
| 920 | if (readl(reg) & bit) |
| 921 | sens = MT_LEVEL_SENSITIVE; |
| 922 | else |
| 923 | sens = MT_EDGE_SENSITIVE; |
| 924 | |
| 925 | if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE)) |
| 926 | return 1; |
| 927 | else |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * mtk_eint_get_mask: To get the eint mask |
| 933 | * @eint_num: the EINT number to get |
| 934 | */ |
| 935 | static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl, |
| 936 | unsigned int eint_num) |
| 937 | { |
| 938 | unsigned int bit = BIT(eint_num % 32); |
| 939 | const struct mtk_eint_offsets *eint_offsets = |
| 940 | &pctl->devdata->eint_offsets; |
| 941 | |
| 942 | void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, |
| 943 | eint_offsets->mask); |
| 944 | |
| 945 | return !!(readl(reg) & bit); |
| 946 | } |
| 947 | |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 948 | static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq) |
| 949 | { |
| 950 | int start_level, curr_level; |
| 951 | unsigned int reg_offset; |
| 952 | const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets); |
Javier Martinez Canillas | b4b05b9 | 2015-08-29 01:25:01 +0200 | [diff] [blame] | 953 | u32 mask = BIT(hwirq & 0x1f); |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 954 | u32 port = (hwirq >> 5) & eint_offsets->port_mask; |
| 955 | void __iomem *reg = pctl->eint_reg_base + (port << 2); |
| 956 | const struct mtk_desc_pin *pin; |
| 957 | |
| 958 | pin = mtk_find_pin_by_eint_num(pctl, hwirq); |
| 959 | curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); |
| 960 | do { |
| 961 | start_level = curr_level; |
| 962 | if (start_level) |
| 963 | reg_offset = eint_offsets->pol_clr; |
| 964 | else |
| 965 | reg_offset = eint_offsets->pol_set; |
| 966 | writel(mask, reg + reg_offset); |
| 967 | |
| 968 | curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); |
| 969 | } while (start_level != curr_level); |
| 970 | |
| 971 | return start_level; |
| 972 | } |
| 973 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 974 | static void mtk_eint_mask(struct irq_data *d) |
| 975 | { |
| 976 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 977 | const struct mtk_eint_offsets *eint_offsets = |
| 978 | &pctl->devdata->eint_offsets; |
| 979 | u32 mask = BIT(d->hwirq & 0x1f); |
| 980 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 981 | eint_offsets->mask_set); |
| 982 | |
| 983 | writel(mask, reg); |
| 984 | } |
| 985 | |
| 986 | static void mtk_eint_unmask(struct irq_data *d) |
| 987 | { |
| 988 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 989 | const struct mtk_eint_offsets *eint_offsets = |
| 990 | &pctl->devdata->eint_offsets; |
| 991 | u32 mask = BIT(d->hwirq & 0x1f); |
| 992 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 993 | eint_offsets->mask_clr); |
| 994 | |
| 995 | writel(mask, reg); |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 996 | |
| 997 | if (pctl->eint_dual_edges[d->hwirq]) |
| 998 | mtk_eint_flip_edge(pctl, d->hwirq); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 999 | } |
| 1000 | |
| 1001 | static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, |
| 1002 | unsigned debounce) |
| 1003 | { |
Linus Walleij | 58383c7 | 2015-11-04 09:56:26 +0100 | [diff] [blame] | 1004 | struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1005 | int eint_num, virq, eint_offset; |
| 1006 | unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc; |
Yingjoe Chen | 5fedbb9 | 2016-04-02 14:57:49 +0800 | [diff] [blame] | 1007 | static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000, |
| 1008 | 128000, 256000}; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1009 | const struct mtk_desc_pin *pin; |
| 1010 | struct irq_data *d; |
| 1011 | |
| 1012 | pin = pctl->devdata->pins + offset; |
| 1013 | if (pin->eint.eintnum == NO_EINT_SUPPORT) |
| 1014 | return -EINVAL; |
| 1015 | |
| 1016 | eint_num = pin->eint.eintnum; |
| 1017 | virq = irq_find_mapping(pctl->domain, eint_num); |
| 1018 | eint_offset = (eint_num % 4) * 8; |
| 1019 | d = irq_get_irq_data(virq); |
| 1020 | |
| 1021 | set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set; |
| 1022 | clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr; |
| 1023 | if (!mtk_eint_can_en_debounce(pctl, eint_num)) |
| 1024 | return -ENOSYS; |
| 1025 | |
Yingjoe Chen | 5fedbb9 | 2016-04-02 14:57:49 +0800 | [diff] [blame] | 1026 | dbnc = ARRAY_SIZE(debounce_time); |
| 1027 | for (i = 0; i < ARRAY_SIZE(debounce_time); i++) { |
| 1028 | if (debounce <= debounce_time[i]) { |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1029 | dbnc = i; |
| 1030 | break; |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | if (!mtk_eint_get_mask(pctl, eint_num)) { |
| 1035 | mtk_eint_mask(d); |
| 1036 | unmask = 1; |
Colin Ian King | 74d77e5 | 2015-04-20 10:59:17 -0500 | [diff] [blame] | 1037 | } else { |
| 1038 | unmask = 0; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | clr_bit = 0xff << eint_offset; |
| 1042 | writel(clr_bit, pctl->eint_reg_base + clr_offset); |
| 1043 | |
| 1044 | bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) << |
| 1045 | eint_offset; |
| 1046 | rst = EINT_DBNC_RST_BIT << eint_offset; |
| 1047 | writel(rst | bit, pctl->eint_reg_base + set_offset); |
| 1048 | |
| 1049 | /* Delay a while (more than 2T) to wait for hw debounce counter reset |
| 1050 | work correctly */ |
| 1051 | udelay(1); |
| 1052 | if (unmask == 1) |
| 1053 | mtk_eint_unmask(d); |
| 1054 | |
| 1055 | return 0; |
| 1056 | } |
| 1057 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1058 | static struct gpio_chip mtk_gpio_chip = { |
| 1059 | .owner = THIS_MODULE, |
Jonas Gorski | 98c85d5 | 2015-10-11 17:34:19 +0200 | [diff] [blame] | 1060 | .request = gpiochip_generic_request, |
| 1061 | .free = gpiochip_generic_free, |
Hongzhou Yang | f97c230 | 2015-11-17 14:17:13 -0800 | [diff] [blame] | 1062 | .get_direction = mtk_gpio_get_direction, |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1063 | .direction_input = mtk_gpio_direction_input, |
| 1064 | .direction_output = mtk_gpio_direction_output, |
| 1065 | .get = mtk_gpio_get, |
| 1066 | .set = mtk_gpio_set, |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1067 | .to_irq = mtk_gpio_to_irq, |
| 1068 | .set_debounce = mtk_gpio_set_debounce, |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1069 | .of_gpio_n_cells = 2, |
| 1070 | }; |
| 1071 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1072 | static int mtk_eint_set_type(struct irq_data *d, |
| 1073 | unsigned int type) |
| 1074 | { |
| 1075 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 1076 | const struct mtk_eint_offsets *eint_offsets = |
| 1077 | &pctl->devdata->eint_offsets; |
| 1078 | u32 mask = BIT(d->hwirq & 0x1f); |
| 1079 | void __iomem *reg; |
| 1080 | |
| 1081 | if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) || |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1082 | ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) { |
| 1083 | dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n", |
| 1084 | d->irq, d->hwirq, type); |
| 1085 | return -EINVAL; |
| 1086 | } |
| 1087 | |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1088 | if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) |
| 1089 | pctl->eint_dual_edges[d->hwirq] = 1; |
| 1090 | else |
| 1091 | pctl->eint_dual_edges[d->hwirq] = 0; |
| 1092 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1093 | if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) { |
| 1094 | reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 1095 | eint_offsets->pol_clr); |
| 1096 | writel(mask, reg); |
| 1097 | } else { |
| 1098 | reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 1099 | eint_offsets->pol_set); |
| 1100 | writel(mask, reg); |
| 1101 | } |
| 1102 | |
| 1103 | if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { |
| 1104 | reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 1105 | eint_offsets->sens_clr); |
| 1106 | writel(mask, reg); |
| 1107 | } else { |
| 1108 | reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 1109 | eint_offsets->sens_set); |
| 1110 | writel(mask, reg); |
| 1111 | } |
| 1112 | |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1113 | if (pctl->eint_dual_edges[d->hwirq]) |
| 1114 | mtk_eint_flip_edge(pctl, d->hwirq); |
| 1115 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1116 | return 0; |
| 1117 | } |
| 1118 | |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 1119 | static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on) |
| 1120 | { |
| 1121 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 1122 | int shift = d->hwirq & 0x1f; |
| 1123 | int reg = d->hwirq >> 5; |
| 1124 | |
| 1125 | if (on) |
| 1126 | pctl->wake_mask[reg] |= BIT(shift); |
| 1127 | else |
| 1128 | pctl->wake_mask[reg] &= ~BIT(shift); |
| 1129 | |
| 1130 | return 0; |
| 1131 | } |
| 1132 | |
| 1133 | static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip, |
| 1134 | void __iomem *eint_reg_base, u32 *buf) |
| 1135 | { |
| 1136 | int port; |
| 1137 | void __iomem *reg; |
| 1138 | |
| 1139 | for (port = 0; port < chip->ports; port++) { |
| 1140 | reg = eint_reg_base + (port << 2); |
| 1141 | writel_relaxed(~buf[port], reg + chip->mask_set); |
| 1142 | writel_relaxed(buf[port], reg + chip->mask_clr); |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip, |
| 1147 | void __iomem *eint_reg_base, u32 *buf) |
| 1148 | { |
| 1149 | int port; |
| 1150 | void __iomem *reg; |
| 1151 | |
| 1152 | for (port = 0; port < chip->ports; port++) { |
| 1153 | reg = eint_reg_base + chip->mask + (port << 2); |
| 1154 | buf[port] = ~readl_relaxed(reg); |
| 1155 | /* Mask is 0 when irq is enabled, and 1 when disabled. */ |
| 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | static int mtk_eint_suspend(struct device *device) |
| 1160 | { |
| 1161 | void __iomem *reg; |
| 1162 | struct mtk_pinctrl *pctl = dev_get_drvdata(device); |
| 1163 | const struct mtk_eint_offsets *eint_offsets = |
| 1164 | &pctl->devdata->eint_offsets; |
| 1165 | |
| 1166 | reg = pctl->eint_reg_base; |
| 1167 | mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask); |
| 1168 | mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask); |
| 1169 | |
| 1170 | return 0; |
| 1171 | } |
| 1172 | |
| 1173 | static int mtk_eint_resume(struct device *device) |
| 1174 | { |
| 1175 | struct mtk_pinctrl *pctl = dev_get_drvdata(device); |
| 1176 | const struct mtk_eint_offsets *eint_offsets = |
| 1177 | &pctl->devdata->eint_offsets; |
| 1178 | |
| 1179 | mtk_eint_chip_write_mask(eint_offsets, |
| 1180 | pctl->eint_reg_base, pctl->cur_mask); |
| 1181 | |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
| 1185 | const struct dev_pm_ops mtk_eint_pm_ops = { |
| 1186 | .suspend = mtk_eint_suspend, |
| 1187 | .resume = mtk_eint_resume, |
| 1188 | }; |
| 1189 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1190 | static void mtk_eint_ack(struct irq_data *d) |
| 1191 | { |
| 1192 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| 1193 | const struct mtk_eint_offsets *eint_offsets = |
| 1194 | &pctl->devdata->eint_offsets; |
| 1195 | u32 mask = BIT(d->hwirq & 0x1f); |
| 1196 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, |
| 1197 | eint_offsets->ack); |
| 1198 | |
| 1199 | writel(mask, reg); |
| 1200 | } |
| 1201 | |
| 1202 | static struct irq_chip mtk_pinctrl_irq_chip = { |
| 1203 | .name = "mt-eint", |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 1204 | .irq_disable = mtk_eint_mask, |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1205 | .irq_mask = mtk_eint_mask, |
| 1206 | .irq_unmask = mtk_eint_unmask, |
| 1207 | .irq_ack = mtk_eint_ack, |
| 1208 | .irq_set_type = mtk_eint_set_type, |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 1209 | .irq_set_wake = mtk_eint_irq_set_wake, |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1210 | .irq_request_resources = mtk_pinctrl_irq_request_resources, |
| 1211 | .irq_release_resources = mtk_pinctrl_irq_release_resources, |
| 1212 | }; |
| 1213 | |
| 1214 | static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl) |
| 1215 | { |
| 1216 | const struct mtk_eint_offsets *eint_offsets = |
| 1217 | &pctl->devdata->eint_offsets; |
| 1218 | void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en; |
| 1219 | unsigned int i; |
| 1220 | |
| 1221 | for (i = 0; i < pctl->devdata->ap_num; i += 32) { |
| 1222 | writel(0xffffffff, reg); |
| 1223 | reg += 4; |
| 1224 | } |
| 1225 | return 0; |
| 1226 | } |
| 1227 | |
| 1228 | static inline void |
| 1229 | mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index) |
| 1230 | { |
| 1231 | unsigned int rst, ctrl_offset; |
| 1232 | unsigned int bit, dbnc; |
| 1233 | const struct mtk_eint_offsets *eint_offsets = |
| 1234 | &pctl->devdata->eint_offsets; |
| 1235 | |
| 1236 | ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl; |
| 1237 | dbnc = readl(pctl->eint_reg_base + ctrl_offset); |
| 1238 | bit = EINT_DBNC_SET_EN << ((index % 4) * 8); |
| 1239 | if ((bit & dbnc) > 0) { |
| 1240 | ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set; |
| 1241 | rst = EINT_DBNC_RST_BIT << ((index % 4) * 8); |
| 1242 | writel(rst, pctl->eint_reg_base + ctrl_offset); |
| 1243 | } |
| 1244 | } |
| 1245 | |
Thomas Gleixner | bd0b9ac | 2015-09-14 10:42:37 +0200 | [diff] [blame] | 1246 | static void mtk_eint_irq_handler(struct irq_desc *desc) |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1247 | { |
Jiang Liu | 5663bb2 | 2015-06-04 12:13:16 +0800 | [diff] [blame] | 1248 | struct irq_chip *chip = irq_desc_get_chip(desc); |
| 1249 | struct mtk_pinctrl *pctl = irq_desc_get_handler_data(desc); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1250 | unsigned int status, eint_num; |
| 1251 | int offset, index, virq; |
| 1252 | const struct mtk_eint_offsets *eint_offsets = |
| 1253 | &pctl->devdata->eint_offsets; |
| 1254 | void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat); |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1255 | int dual_edges, start_level, curr_level; |
| 1256 | const struct mtk_desc_pin *pin; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1257 | |
| 1258 | chained_irq_enter(chip, desc); |
hongkun.cao | 5edf673 | 2016-05-21 15:23:39 +0800 | [diff] [blame^] | 1259 | for (eint_num = 0; |
| 1260 | eint_num < pctl->devdata->ap_num; |
| 1261 | eint_num += 32, reg += 4) { |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1262 | status = readl(reg); |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1263 | while (status) { |
| 1264 | offset = __ffs(status); |
| 1265 | index = eint_num + offset; |
| 1266 | virq = irq_find_mapping(pctl->domain, index); |
| 1267 | status &= ~BIT(offset); |
| 1268 | |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1269 | dual_edges = pctl->eint_dual_edges[index]; |
| 1270 | if (dual_edges) { |
| 1271 | /* Clear soft-irq in case we raised it |
| 1272 | last time */ |
| 1273 | writel(BIT(offset), reg - eint_offsets->stat + |
| 1274 | eint_offsets->soft_clr); |
| 1275 | |
| 1276 | pin = mtk_find_pin_by_eint_num(pctl, index); |
| 1277 | start_level = mtk_gpio_get(pctl->chip, |
| 1278 | pin->pin.number); |
| 1279 | } |
| 1280 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1281 | generic_handle_irq(virq); |
| 1282 | |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1283 | if (dual_edges) { |
| 1284 | curr_level = mtk_eint_flip_edge(pctl, index); |
| 1285 | |
| 1286 | /* If level changed, we might lost one edge |
| 1287 | interrupt, raised it through soft-irq */ |
| 1288 | if (start_level != curr_level) |
| 1289 | writel(BIT(offset), reg - |
| 1290 | eint_offsets->stat + |
| 1291 | eint_offsets->soft_set); |
| 1292 | } |
| 1293 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1294 | if (index < pctl->devdata->db_cnt) |
| 1295 | mtk_eint_debounce_process(pctl , index); |
| 1296 | } |
| 1297 | } |
| 1298 | chained_irq_exit(chip, desc); |
| 1299 | } |
| 1300 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1301 | static int mtk_pctrl_build_state(struct platform_device *pdev) |
| 1302 | { |
| 1303 | struct mtk_pinctrl *pctl = platform_get_drvdata(pdev); |
| 1304 | int i; |
| 1305 | |
| 1306 | pctl->ngroups = pctl->devdata->npins; |
| 1307 | |
| 1308 | /* Allocate groups */ |
Axel Lin | 0206caa | 2015-03-12 21:53:32 +0800 | [diff] [blame] | 1309 | pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups, |
| 1310 | sizeof(*pctl->groups), GFP_KERNEL); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1311 | if (!pctl->groups) |
| 1312 | return -ENOMEM; |
| 1313 | |
| 1314 | /* We assume that one pin is one group, use pin name as group name. */ |
Axel Lin | 0206caa | 2015-03-12 21:53:32 +0800 | [diff] [blame] | 1315 | pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups, |
| 1316 | sizeof(*pctl->grp_names), GFP_KERNEL); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1317 | if (!pctl->grp_names) |
| 1318 | return -ENOMEM; |
| 1319 | |
| 1320 | for (i = 0; i < pctl->devdata->npins; i++) { |
| 1321 | const struct mtk_desc_pin *pin = pctl->devdata->pins + i; |
| 1322 | struct mtk_pinctrl_group *group = pctl->groups + i; |
| 1323 | |
| 1324 | group->name = pin->pin.name; |
| 1325 | group->pin = pin->pin.number; |
| 1326 | |
| 1327 | pctl->grp_names[i] = pin->pin.name; |
| 1328 | } |
| 1329 | |
| 1330 | return 0; |
| 1331 | } |
| 1332 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1333 | int mtk_pctrl_init(struct platform_device *pdev, |
Hongzhou Yang | fc59e66 | 2015-05-18 23:11:17 -0700 | [diff] [blame] | 1334 | const struct mtk_pinctrl_devdata *data, |
| 1335 | struct regmap *regmap) |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1336 | { |
| 1337 | struct pinctrl_pin_desc *pins; |
| 1338 | struct mtk_pinctrl *pctl; |
| 1339 | struct device_node *np = pdev->dev.of_node, *node; |
| 1340 | struct property *prop; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1341 | struct resource *res; |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 1342 | int i, ret, irq, ports_buf; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1343 | |
| 1344 | pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); |
| 1345 | if (!pctl) |
| 1346 | return -ENOMEM; |
| 1347 | |
| 1348 | platform_set_drvdata(pdev, pctl); |
| 1349 | |
| 1350 | prop = of_find_property(np, "pins-are-numbered", NULL); |
| 1351 | if (!prop) { |
Hongzhou Yang | c445cac | 2015-02-11 23:56:11 -0800 | [diff] [blame] | 1352 | dev_err(&pdev->dev, "only support pins-are-numbered format\n"); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1353 | return -EINVAL; |
| 1354 | } |
| 1355 | |
| 1356 | node = of_parse_phandle(np, "mediatek,pctl-regmap", 0); |
| 1357 | if (node) { |
| 1358 | pctl->regmap1 = syscon_node_to_regmap(node); |
| 1359 | if (IS_ERR(pctl->regmap1)) |
| 1360 | return PTR_ERR(pctl->regmap1); |
Hongzhou Yang | fc59e66 | 2015-05-18 23:11:17 -0700 | [diff] [blame] | 1361 | } else if (regmap) { |
| 1362 | pctl->regmap1 = regmap; |
| 1363 | } else { |
| 1364 | dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n"); |
| 1365 | return -EINVAL; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1366 | } |
| 1367 | |
| 1368 | /* Only 8135 has two base addr, other SoCs have only one. */ |
| 1369 | node = of_parse_phandle(np, "mediatek,pctl-regmap", 1); |
| 1370 | if (node) { |
| 1371 | pctl->regmap2 = syscon_node_to_regmap(node); |
| 1372 | if (IS_ERR(pctl->regmap2)) |
| 1373 | return PTR_ERR(pctl->regmap2); |
| 1374 | } |
| 1375 | |
| 1376 | pctl->devdata = data; |
| 1377 | ret = mtk_pctrl_build_state(pdev); |
| 1378 | if (ret) { |
| 1379 | dev_err(&pdev->dev, "build state failed: %d\n", ret); |
| 1380 | return -EINVAL; |
| 1381 | } |
| 1382 | |
Axel Lin | 0206caa | 2015-03-12 21:53:32 +0800 | [diff] [blame] | 1383 | pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins), |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1384 | GFP_KERNEL); |
| 1385 | if (!pins) |
| 1386 | return -ENOMEM; |
| 1387 | |
| 1388 | for (i = 0; i < pctl->devdata->npins; i++) |
| 1389 | pins[i] = pctl->devdata->pins[i].pin; |
Hongzhou Yang | d48c2c0 | 2015-08-25 17:32:45 -0700 | [diff] [blame] | 1390 | |
| 1391 | pctl->pctl_desc.name = dev_name(&pdev->dev); |
| 1392 | pctl->pctl_desc.owner = THIS_MODULE; |
| 1393 | pctl->pctl_desc.pins = pins; |
| 1394 | pctl->pctl_desc.npins = pctl->devdata->npins; |
| 1395 | pctl->pctl_desc.confops = &mtk_pconf_ops; |
| 1396 | pctl->pctl_desc.pctlops = &mtk_pctrl_ops; |
| 1397 | pctl->pctl_desc.pmxops = &mtk_pmx_ops; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1398 | pctl->dev = &pdev->dev; |
Hongzhou Yang | d48c2c0 | 2015-08-25 17:32:45 -0700 | [diff] [blame] | 1399 | |
Laxman Dewangan | 03a3a55 | 2016-02-28 14:43:15 +0530 | [diff] [blame] | 1400 | pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc, |
| 1401 | pctl); |
Masahiro Yamada | 323de9e | 2015-06-09 13:01:16 +0900 | [diff] [blame] | 1402 | if (IS_ERR(pctl->pctl_dev)) { |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1403 | dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); |
Masahiro Yamada | 323de9e | 2015-06-09 13:01:16 +0900 | [diff] [blame] | 1404 | return PTR_ERR(pctl->pctl_dev); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1405 | } |
| 1406 | |
| 1407 | pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); |
Laxman Dewangan | 03a3a55 | 2016-02-28 14:43:15 +0530 | [diff] [blame] | 1408 | if (!pctl->chip) |
| 1409 | return -ENOMEM; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1410 | |
Hongzhou Yang | fc63d85 | 2015-05-27 02:43:55 -0700 | [diff] [blame] | 1411 | *pctl->chip = mtk_gpio_chip; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1412 | pctl->chip->ngpio = pctl->devdata->npins; |
| 1413 | pctl->chip->label = dev_name(&pdev->dev); |
Linus Walleij | 58383c7 | 2015-11-04 09:56:26 +0100 | [diff] [blame] | 1414 | pctl->chip->parent = &pdev->dev; |
Hongzhou Yang | fc59e66 | 2015-05-18 23:11:17 -0700 | [diff] [blame] | 1415 | pctl->chip->base = -1; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1416 | |
Linus Walleij | 11aa679 | 2015-12-08 22:06:23 +0100 | [diff] [blame] | 1417 | ret = gpiochip_add_data(pctl->chip, pctl); |
Laxman Dewangan | 03a3a55 | 2016-02-28 14:43:15 +0530 | [diff] [blame] | 1418 | if (ret) |
| 1419 | return -EINVAL; |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1420 | |
| 1421 | /* Register the GPIO to pin mappings. */ |
| 1422 | ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), |
| 1423 | 0, 0, pctl->devdata->npins); |
| 1424 | if (ret) { |
| 1425 | ret = -EINVAL; |
| 1426 | goto chip_error; |
| 1427 | } |
| 1428 | |
Hongzhou Yang | fc63d85 | 2015-05-27 02:43:55 -0700 | [diff] [blame] | 1429 | if (!of_property_read_bool(np, "interrupt-controller")) |
Hongzhou Yang | fc59e66 | 2015-05-18 23:11:17 -0700 | [diff] [blame] | 1430 | return 0; |
| 1431 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1432 | /* Get EINT register base from dts. */ |
| 1433 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1434 | if (!res) { |
| 1435 | dev_err(&pdev->dev, "Unable to get Pinctrl resource\n"); |
| 1436 | ret = -EINVAL; |
| 1437 | goto chip_error; |
| 1438 | } |
| 1439 | |
| 1440 | pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res); |
| 1441 | if (IS_ERR(pctl->eint_reg_base)) { |
| 1442 | ret = -EINVAL; |
| 1443 | goto chip_error; |
| 1444 | } |
| 1445 | |
Maoguang Meng | 58a5e1b | 2015-08-14 16:38:06 +0800 | [diff] [blame] | 1446 | ports_buf = pctl->devdata->eint_offsets.ports; |
| 1447 | pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf, |
| 1448 | sizeof(*pctl->wake_mask), GFP_KERNEL); |
| 1449 | if (!pctl->wake_mask) { |
| 1450 | ret = -ENOMEM; |
| 1451 | goto chip_error; |
| 1452 | } |
| 1453 | |
| 1454 | pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf, |
| 1455 | sizeof(*pctl->cur_mask), GFP_KERNEL); |
| 1456 | if (!pctl->cur_mask) { |
| 1457 | ret = -ENOMEM; |
| 1458 | goto chip_error; |
| 1459 | } |
| 1460 | |
Axel Lin | 0206caa | 2015-03-12 21:53:32 +0800 | [diff] [blame] | 1461 | pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num, |
| 1462 | sizeof(int), GFP_KERNEL); |
Yingjoe Chen | 3221f40 | 2015-01-27 14:15:26 +0800 | [diff] [blame] | 1463 | if (!pctl->eint_dual_edges) { |
| 1464 | ret = -ENOMEM; |
| 1465 | goto chip_error; |
| 1466 | } |
| 1467 | |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1468 | irq = irq_of_parse_and_map(np, 0); |
| 1469 | if (!irq) { |
| 1470 | dev_err(&pdev->dev, "couldn't parse and map irq\n"); |
| 1471 | ret = -EINVAL; |
Axel Lin | 61a3557 | 2015-03-12 21:52:33 +0800 | [diff] [blame] | 1472 | goto chip_error; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1473 | } |
| 1474 | |
| 1475 | pctl->domain = irq_domain_add_linear(np, |
| 1476 | pctl->devdata->ap_num, &irq_domain_simple_ops, NULL); |
| 1477 | if (!pctl->domain) { |
| 1478 | dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); |
| 1479 | ret = -ENOMEM; |
Axel Lin | 61a3557 | 2015-03-12 21:52:33 +0800 | [diff] [blame] | 1480 | goto chip_error; |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | mtk_eint_init(pctl); |
| 1484 | for (i = 0; i < pctl->devdata->ap_num; i++) { |
| 1485 | int virq = irq_create_mapping(pctl->domain, i); |
| 1486 | |
| 1487 | irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip, |
| 1488 | handle_level_irq); |
| 1489 | irq_set_chip_data(virq, pctl); |
Javier Martinez Canillas | e441189 | 2015-09-16 10:28:30 +0200 | [diff] [blame] | 1490 | } |
Maoguang Meng | d9819eb | 2015-01-21 13:28:16 +0800 | [diff] [blame] | 1491 | |
Thomas Gleixner | 1e10592 | 2015-06-21 20:16:09 +0200 | [diff] [blame] | 1492 | irq_set_chained_handler_and_data(irq, mtk_eint_irq_handler, pctl); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1493 | return 0; |
| 1494 | |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1495 | chip_error: |
| 1496 | gpiochip_remove(pctl->chip); |
Hongzhou Yang | a6df410 | 2015-01-21 13:28:15 +0800 | [diff] [blame] | 1497 | return ret; |
| 1498 | } |
| 1499 | |
| 1500 | MODULE_LICENSE("GPL"); |
| 1501 | MODULE_DESCRIPTION("MediaTek Pinctrl Driver"); |
| 1502 | MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>"); |