Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 1 | /* |
| 2 | * SuperH Pin Function Controller pinmux support. |
| 3 | * |
| 4 | * Copyright (C) 2012 Paul Mundt |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of the GNU General Public |
| 7 | * License. See the file "COPYING" in the main directory of this archive |
| 8 | * for more details. |
| 9 | */ |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 10 | #define DRV_NAME "pinctrl-sh_pfc" |
| 11 | |
| 12 | #define pr_fmt(fmt) DRV_NAME " " KBUILD_MODNAME ": " fmt |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 13 | |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/sh_pfc.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/slab.h> |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 19 | #include <linux/spinlock.h> |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/pinctrl/consumer.h> |
| 22 | #include <linux/pinctrl/pinctrl.h> |
| 23 | #include <linux/pinctrl/pinconf.h> |
| 24 | #include <linux/pinctrl/pinmux.h> |
| 25 | #include <linux/pinctrl/pinconf-generic.h> |
| 26 | |
Laurent Pinchart | f916513 | 2012-12-15 23:50:44 +0100 | [diff] [blame^] | 27 | #include "core.h" |
| 28 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 29 | struct sh_pfc_pinctrl { |
| 30 | struct pinctrl_dev *pctl; |
| 31 | struct sh_pfc *pfc; |
| 32 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 33 | struct pinmux_gpio **functions; |
| 34 | unsigned int nr_functions; |
| 35 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 36 | struct pinctrl_pin_desc *pads; |
| 37 | unsigned int nr_pads; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 38 | |
| 39 | spinlock_t lock; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 40 | }; |
| 41 | |
| 42 | static struct sh_pfc_pinctrl *sh_pfc_pmx; |
| 43 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 44 | static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 45 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 46 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 47 | |
| 48 | return pmx->nr_pads; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 49 | } |
| 50 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 51 | static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 52 | unsigned selector) |
| 53 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 54 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 55 | |
| 56 | return pmx->pads[selector].name; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, |
| 60 | const unsigned **pins, unsigned *num_pins) |
| 61 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 62 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 63 | |
| 64 | *pins = &pmx->pads[group].number; |
| 65 | *num_pins = 1; |
| 66 | |
| 67 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 68 | } |
| 69 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 70 | static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, |
| 71 | unsigned offset) |
| 72 | { |
| 73 | seq_printf(s, "%s", DRV_NAME); |
| 74 | } |
| 75 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 76 | static struct pinctrl_ops sh_pfc_pinctrl_ops = { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 77 | .get_groups_count = sh_pfc_get_groups_count, |
| 78 | .get_group_name = sh_pfc_get_group_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 79 | .get_group_pins = sh_pfc_get_group_pins, |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 80 | .pin_dbg_show = sh_pfc_pin_dbg_show, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 81 | }; |
| 82 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 83 | static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) |
| 84 | { |
| 85 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 86 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 87 | return pmx->nr_functions; |
| 88 | } |
| 89 | |
| 90 | static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, |
| 91 | unsigned selector) |
| 92 | { |
| 93 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 94 | |
| 95 | return pmx->functions[selector]->name; |
| 96 | } |
| 97 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 98 | static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func, |
| 99 | const char * const **groups, |
| 100 | unsigned * const num_groups) |
| 101 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 102 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 103 | |
| 104 | *groups = &pmx->functions[func]->name; |
| 105 | *num_groups = 1; |
| 106 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func, |
| 111 | unsigned group) |
| 112 | { |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func, |
| 117 | unsigned group) |
| 118 | { |
| 119 | } |
| 120 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 121 | static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset) |
| 122 | { |
| 123 | if (sh_pfc_config_gpio(pfc, offset, |
| 124 | PINMUX_TYPE_FUNCTION, |
| 125 | GPIO_CFG_DRYRUN) != 0) |
| 126 | return -EINVAL; |
| 127 | |
| 128 | if (sh_pfc_config_gpio(pfc, offset, |
| 129 | PINMUX_TYPE_FUNCTION, |
| 130 | GPIO_CFG_REQ) != 0) |
| 131 | return -EINVAL; |
| 132 | |
| 133 | return 0; |
| 134 | } |
| 135 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 136 | static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset, |
| 137 | int new_type) |
| 138 | { |
| 139 | unsigned long flags; |
| 140 | int pinmux_type; |
| 141 | int ret = -EINVAL; |
| 142 | |
| 143 | spin_lock_irqsave(&pfc->lock, flags); |
| 144 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 145 | pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 146 | |
| 147 | /* |
| 148 | * See if the present config needs to first be de-configured. |
| 149 | */ |
| 150 | switch (pinmux_type) { |
| 151 | case PINMUX_TYPE_GPIO: |
| 152 | break; |
| 153 | case PINMUX_TYPE_OUTPUT: |
| 154 | case PINMUX_TYPE_INPUT: |
| 155 | case PINMUX_TYPE_INPUT_PULLUP: |
| 156 | case PINMUX_TYPE_INPUT_PULLDOWN: |
| 157 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 158 | break; |
| 159 | default: |
| 160 | goto err; |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Dry run |
| 165 | */ |
| 166 | if (sh_pfc_config_gpio(pfc, offset, new_type, |
| 167 | GPIO_CFG_DRYRUN) != 0) |
| 168 | goto err; |
| 169 | |
| 170 | /* |
| 171 | * Request |
| 172 | */ |
| 173 | if (sh_pfc_config_gpio(pfc, offset, new_type, |
| 174 | GPIO_CFG_REQ) != 0) |
| 175 | goto err; |
| 176 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 177 | pfc->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; |
| 178 | pfc->pdata->gpios[offset].flags |= new_type; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 179 | |
| 180 | ret = 0; |
| 181 | |
| 182 | err: |
| 183 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 184 | |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 189 | static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 190 | struct pinctrl_gpio_range *range, |
| 191 | unsigned offset) |
| 192 | { |
| 193 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 194 | struct sh_pfc *pfc = pmx->pfc; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 195 | unsigned long flags; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 196 | int ret, pinmux_type; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 197 | |
| 198 | spin_lock_irqsave(&pfc->lock, flags); |
| 199 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 200 | pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 201 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 202 | switch (pinmux_type) { |
| 203 | case PINMUX_TYPE_FUNCTION: |
| 204 | pr_notice_once("Use of GPIO API for function requests is " |
| 205 | "deprecated, convert to pinctrl\n"); |
| 206 | /* handle for now */ |
| 207 | ret = sh_pfc_config_function(pfc, offset); |
| 208 | if (unlikely(ret < 0)) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 209 | goto err; |
| 210 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 211 | break; |
| 212 | case PINMUX_TYPE_GPIO: |
Paul Mundt | 16d74eb | 2012-09-25 11:51:05 +0900 | [diff] [blame] | 213 | case PINMUX_TYPE_INPUT: |
| 214 | case PINMUX_TYPE_OUTPUT: |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 215 | break; |
| 216 | default: |
| 217 | pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type); |
Laurent Pinchart | 077664a | 2012-09-14 20:25:48 +0200 | [diff] [blame] | 218 | ret = -ENOTSUPP; |
| 219 | goto err; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 220 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 221 | |
| 222 | ret = 0; |
| 223 | |
| 224 | err: |
| 225 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 226 | |
| 227 | return ret; |
| 228 | } |
| 229 | |
| 230 | static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, |
| 231 | struct pinctrl_gpio_range *range, |
| 232 | unsigned offset) |
| 233 | { |
| 234 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 235 | struct sh_pfc *pfc = pmx->pfc; |
| 236 | unsigned long flags; |
| 237 | int pinmux_type; |
| 238 | |
| 239 | spin_lock_irqsave(&pfc->lock, flags); |
| 240 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 241 | pinmux_type = pfc->pdata->gpios[offset].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 242 | |
| 243 | sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); |
| 244 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 245 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 246 | } |
| 247 | |
| 248 | static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 249 | struct pinctrl_gpio_range *range, |
| 250 | unsigned offset, bool input) |
| 251 | { |
| 252 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 253 | int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 254 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 255 | return sh_pfc_reconfig_pin(pmx->pfc, offset, type); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | static struct pinmux_ops sh_pfc_pinmux_ops = { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 259 | .get_functions_count = sh_pfc_get_functions_count, |
| 260 | .get_function_name = sh_pfc_get_function_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 261 | .get_function_groups = sh_pfc_get_function_groups, |
| 262 | .enable = sh_pfc_noop_enable, |
| 263 | .disable = sh_pfc_noop_disable, |
| 264 | .gpio_request_enable = sh_pfc_gpio_request_enable, |
| 265 | .gpio_disable_free = sh_pfc_gpio_disable_free, |
| 266 | .gpio_set_direction = sh_pfc_gpio_set_direction, |
| 267 | }; |
| 268 | |
| 269 | static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
| 270 | unsigned long *config) |
| 271 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 272 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 273 | struct sh_pfc *pfc = pmx->pfc; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 274 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 275 | *config = pfc->pdata->gpios[pin].flags & PINMUX_FLAG_TYPE; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 276 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 277 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, |
| 281 | unsigned long config) |
| 282 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 283 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 284 | |
| 285 | /* Validate the new type */ |
| 286 | if (config >= PINMUX_FLAG_TYPE) |
| 287 | return -EINVAL; |
| 288 | |
| 289 | return sh_pfc_reconfig_pin(pmx->pfc, pin, config); |
| 290 | } |
| 291 | |
| 292 | static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
| 293 | struct seq_file *s, unsigned pin) |
| 294 | { |
| 295 | const char *pinmux_type_str[] = { |
| 296 | [PINMUX_TYPE_NONE] = "none", |
| 297 | [PINMUX_TYPE_FUNCTION] = "function", |
| 298 | [PINMUX_TYPE_GPIO] = "gpio", |
| 299 | [PINMUX_TYPE_OUTPUT] = "output", |
| 300 | [PINMUX_TYPE_INPUT] = "input", |
| 301 | [PINMUX_TYPE_INPUT_PULLUP] = "input bias pull up", |
| 302 | [PINMUX_TYPE_INPUT_PULLDOWN] = "input bias pull down", |
| 303 | }; |
| 304 | unsigned long config; |
| 305 | int rc; |
| 306 | |
| 307 | rc = sh_pfc_pinconf_get(pctldev, pin, &config); |
| 308 | if (unlikely(rc != 0)) |
| 309 | return; |
| 310 | |
| 311 | seq_printf(s, " %s", pinmux_type_str[config]); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | static struct pinconf_ops sh_pfc_pinconf_ops = { |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 315 | .pin_config_get = sh_pfc_pinconf_get, |
| 316 | .pin_config_set = sh_pfc_pinconf_set, |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 317 | .pin_config_dbg_show = sh_pfc_pinconf_dbg_show, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 318 | }; |
| 319 | |
| 320 | static struct pinctrl_gpio_range sh_pfc_gpio_range = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 321 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 322 | .id = 0, |
| 323 | }; |
| 324 | |
| 325 | static struct pinctrl_desc sh_pfc_pinctrl_desc = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 326 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 327 | .owner = THIS_MODULE, |
| 328 | .pctlops = &sh_pfc_pinctrl_ops, |
| 329 | .pmxops = &sh_pfc_pinmux_ops, |
| 330 | .confops = &sh_pfc_pinconf_ops, |
| 331 | }; |
| 332 | |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 333 | static inline void sh_pfc_map_one_gpio(struct sh_pfc *pfc, |
| 334 | struct sh_pfc_pinctrl *pmx, |
| 335 | struct pinmux_gpio *gpio, |
| 336 | unsigned offset) |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 337 | { |
| 338 | struct pinmux_data_reg *dummy; |
| 339 | unsigned long flags; |
| 340 | int bit; |
| 341 | |
| 342 | gpio->flags &= ~PINMUX_FLAG_TYPE; |
| 343 | |
| 344 | if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0) |
| 345 | gpio->flags |= PINMUX_TYPE_GPIO; |
| 346 | else { |
| 347 | gpio->flags |= PINMUX_TYPE_FUNCTION; |
| 348 | |
| 349 | spin_lock_irqsave(&pmx->lock, flags); |
| 350 | pmx->nr_functions++; |
| 351 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 352 | } |
| 353 | } |
| 354 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 355 | /* pinmux ranges -> pinctrl pin descs */ |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 356 | static int sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 357 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 358 | unsigned long flags; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 359 | int i; |
| 360 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 361 | pmx->nr_pads = pfc->pdata->last_gpio - pfc->pdata->first_gpio + 1; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 362 | |
| 363 | pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads, |
| 364 | GFP_KERNEL); |
| 365 | if (unlikely(!pmx->pads)) { |
| 366 | pmx->nr_pads = 0; |
| 367 | return -ENOMEM; |
| 368 | } |
| 369 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 370 | spin_lock_irqsave(&pfc->lock, flags); |
| 371 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 372 | /* |
| 373 | * We don't necessarily have a 1:1 mapping between pin and linux |
| 374 | * GPIO number, as the latter maps to the associated enum_id. |
| 375 | * Care needs to be taken to translate back to pin space when |
| 376 | * dealing with any pin configurations. |
| 377 | */ |
| 378 | for (i = 0; i < pmx->nr_pads; i++) { |
| 379 | struct pinctrl_pin_desc *pin = pmx->pads + i; |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 380 | struct pinmux_gpio *gpio = pfc->pdata->gpios + i; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 381 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 382 | pin->number = pfc->pdata->first_gpio + i; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 383 | pin->name = gpio->name; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 384 | |
Paul Mundt | e3e7945 | 2012-07-17 15:23:11 +0900 | [diff] [blame] | 385 | /* XXX */ |
| 386 | if (unlikely(!gpio->enum_id)) |
| 387 | continue; |
| 388 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 389 | sh_pfc_map_one_gpio(pfc, pmx, gpio, i); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 390 | } |
| 391 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 392 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 393 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 394 | sh_pfc_pinctrl_desc.pins = pmx->pads; |
| 395 | sh_pfc_pinctrl_desc.npins = pmx->nr_pads; |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 400 | static int sh_pfc_map_functions(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 401 | { |
| 402 | unsigned long flags; |
| 403 | int i, fn; |
| 404 | |
| 405 | pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *), |
| 406 | GFP_KERNEL); |
| 407 | if (unlikely(!pmx->functions)) |
| 408 | return -ENOMEM; |
| 409 | |
| 410 | spin_lock_irqsave(&pmx->lock, flags); |
| 411 | |
| 412 | for (i = fn = 0; i < pmx->nr_pads; i++) { |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 413 | struct pinmux_gpio *gpio = pfc->pdata->gpios + i; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 414 | |
| 415 | if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION) |
| 416 | pmx->functions[fn++] = gpio; |
| 417 | } |
| 418 | |
| 419 | spin_unlock_irqrestore(&pmx->lock, flags); |
| 420 | |
| 421 | return 0; |
| 422 | } |
| 423 | |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 424 | static int sh_pfc_pinctrl_probe(struct platform_device *pdev) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 425 | { |
| 426 | struct sh_pfc *pfc; |
| 427 | int ret; |
| 428 | |
| 429 | if (unlikely(!sh_pfc_pmx)) |
| 430 | return -ENODEV; |
| 431 | |
| 432 | pfc = sh_pfc_pmx->pfc; |
| 433 | |
| 434 | ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx); |
| 435 | if (unlikely(ret != 0)) |
| 436 | return ret; |
| 437 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 438 | ret = sh_pfc_map_functions(pfc, sh_pfc_pmx); |
| 439 | if (unlikely(ret != 0)) |
| 440 | goto free_pads; |
| 441 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 442 | sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev, |
| 443 | sh_pfc_pmx); |
| 444 | if (IS_ERR(sh_pfc_pmx->pctl)) { |
| 445 | ret = PTR_ERR(sh_pfc_pmx->pctl); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 446 | goto free_functions; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 447 | } |
| 448 | |
Laurent Pinchart | d4e62d0 | 2012-12-15 23:50:43 +0100 | [diff] [blame] | 449 | sh_pfc_gpio_range.npins = pfc->pdata->last_gpio |
| 450 | - pfc->pdata->first_gpio + 1; |
| 451 | sh_pfc_gpio_range.base = pfc->pdata->first_gpio; |
| 452 | sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 453 | |
| 454 | pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range); |
| 455 | |
| 456 | platform_set_drvdata(pdev, sh_pfc_pmx); |
| 457 | |
| 458 | return 0; |
| 459 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 460 | free_functions: |
| 461 | kfree(sh_pfc_pmx->functions); |
| 462 | free_pads: |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 463 | kfree(sh_pfc_pmx->pads); |
| 464 | kfree(sh_pfc_pmx); |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 465 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 466 | return ret; |
| 467 | } |
| 468 | |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 469 | static int sh_pfc_pinctrl_remove(struct platform_device *pdev) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 470 | { |
| 471 | struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev); |
| 472 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 473 | pinctrl_unregister(pmx->pctl); |
| 474 | |
| 475 | platform_set_drvdata(pdev, NULL); |
| 476 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 477 | kfree(sh_pfc_pmx->functions); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 478 | kfree(sh_pfc_pmx->pads); |
| 479 | kfree(sh_pfc_pmx); |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | static struct platform_driver sh_pfc_pinctrl_driver = { |
| 485 | .probe = sh_pfc_pinctrl_probe, |
Greg Kroah-Hartman | 0fe763c | 2012-12-21 15:14:44 -0800 | [diff] [blame] | 486 | .remove = sh_pfc_pinctrl_remove, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 487 | .driver = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 488 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 489 | .owner = THIS_MODULE, |
| 490 | }, |
| 491 | }; |
| 492 | |
| 493 | static struct platform_device sh_pfc_pinctrl_device = { |
Paul Mundt | 5440711 | 2012-07-20 16:18:21 +0900 | [diff] [blame] | 494 | .name = DRV_NAME, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 495 | .id = -1, |
| 496 | }; |
| 497 | |
Paul Mundt | 1e32dfe | 2012-08-01 16:27:38 +0900 | [diff] [blame] | 498 | static int sh_pfc_pinctrl_init(void) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 499 | { |
| 500 | int rc; |
| 501 | |
| 502 | rc = platform_driver_register(&sh_pfc_pinctrl_driver); |
| 503 | if (likely(!rc)) { |
| 504 | rc = platform_device_register(&sh_pfc_pinctrl_device); |
| 505 | if (unlikely(rc)) |
| 506 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 507 | } |
| 508 | |
| 509 | return rc; |
| 510 | } |
| 511 | |
Paul Mundt | 1e32dfe | 2012-08-01 16:27:38 +0900 | [diff] [blame] | 512 | int sh_pfc_register_pinctrl(struct sh_pfc *pfc) |
| 513 | { |
| 514 | sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); |
| 515 | if (unlikely(!sh_pfc_pmx)) |
| 516 | return -ENOMEM; |
| 517 | |
| 518 | spin_lock_init(&sh_pfc_pmx->lock); |
| 519 | |
| 520 | sh_pfc_pmx->pfc = pfc; |
| 521 | |
| 522 | return sh_pfc_pinctrl_init(); |
| 523 | } |
| 524 | EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl); |
| 525 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 526 | static void __exit sh_pfc_pinctrl_exit(void) |
| 527 | { |
| 528 | platform_driver_unregister(&sh_pfc_pinctrl_driver); |
| 529 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 530 | module_exit(sh_pfc_pinctrl_exit); |