Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Marvell MVEBU pinctrl core driver |
| 3 | * |
| 4 | * Authors: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> |
| 5 | * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <linux/of.h> |
| 18 | #include <linux/of_address.h> |
| 19 | #include <linux/of_platform.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/gpio.h> |
| 22 | #include <linux/pinctrl/machine.h> |
| 23 | #include <linux/pinctrl/pinconf.h> |
| 24 | #include <linux/pinctrl/pinctrl.h> |
| 25 | #include <linux/pinctrl/pinmux.h> |
| 26 | |
Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 27 | #include "pinctrl-mvebu.h" |
| 28 | |
| 29 | #define MPPS_PER_REG 8 |
| 30 | #define MPP_BITS 4 |
| 31 | #define MPP_MASK 0xf |
| 32 | |
| 33 | struct mvebu_pinctrl_function { |
| 34 | const char *name; |
| 35 | const char **groups; |
| 36 | unsigned num_groups; |
| 37 | }; |
| 38 | |
| 39 | struct mvebu_pinctrl_group { |
| 40 | const char *name; |
| 41 | struct mvebu_mpp_ctrl *ctrl; |
| 42 | struct mvebu_mpp_ctrl_setting *settings; |
| 43 | unsigned num_settings; |
| 44 | unsigned gid; |
| 45 | unsigned *pins; |
| 46 | unsigned npins; |
| 47 | }; |
| 48 | |
| 49 | struct mvebu_pinctrl { |
| 50 | struct device *dev; |
| 51 | struct pinctrl_dev *pctldev; |
| 52 | struct pinctrl_desc desc; |
| 53 | void __iomem *base; |
| 54 | struct mvebu_pinctrl_group *groups; |
| 55 | unsigned num_groups; |
| 56 | struct mvebu_pinctrl_function *functions; |
| 57 | unsigned num_functions; |
| 58 | u8 variant; |
| 59 | }; |
| 60 | |
| 61 | static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_pid( |
| 62 | struct mvebu_pinctrl *pctl, unsigned pid) |
| 63 | { |
| 64 | unsigned n; |
| 65 | for (n = 0; n < pctl->num_groups; n++) { |
| 66 | if (pid >= pctl->groups[n].pins[0] && |
| 67 | pid < pctl->groups[n].pins[0] + |
| 68 | pctl->groups[n].npins) |
| 69 | return &pctl->groups[n]; |
| 70 | } |
| 71 | return NULL; |
| 72 | } |
| 73 | |
| 74 | static struct mvebu_pinctrl_group *mvebu_pinctrl_find_group_by_name( |
| 75 | struct mvebu_pinctrl *pctl, const char *name) |
| 76 | { |
| 77 | unsigned n; |
| 78 | for (n = 0; n < pctl->num_groups; n++) { |
| 79 | if (strcmp(name, pctl->groups[n].name) == 0) |
| 80 | return &pctl->groups[n]; |
| 81 | } |
| 82 | return NULL; |
| 83 | } |
| 84 | |
| 85 | static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_val( |
| 86 | struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp, |
| 87 | unsigned long config) |
| 88 | { |
| 89 | unsigned n; |
| 90 | for (n = 0; n < grp->num_settings; n++) { |
| 91 | if (config == grp->settings[n].val) { |
| 92 | if (!pctl->variant || (pctl->variant & |
| 93 | grp->settings[n].variant)) |
| 94 | return &grp->settings[n]; |
| 95 | } |
| 96 | } |
| 97 | return NULL; |
| 98 | } |
| 99 | |
| 100 | static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_setting_by_name( |
| 101 | struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp, |
| 102 | const char *name) |
| 103 | { |
| 104 | unsigned n; |
| 105 | for (n = 0; n < grp->num_settings; n++) { |
| 106 | if (strcmp(name, grp->settings[n].name) == 0) { |
| 107 | if (!pctl->variant || (pctl->variant & |
| 108 | grp->settings[n].variant)) |
| 109 | return &grp->settings[n]; |
| 110 | } |
| 111 | } |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | static struct mvebu_mpp_ctrl_setting *mvebu_pinctrl_find_gpio_setting( |
| 116 | struct mvebu_pinctrl *pctl, struct mvebu_pinctrl_group *grp) |
| 117 | { |
| 118 | unsigned n; |
| 119 | for (n = 0; n < grp->num_settings; n++) { |
| 120 | if (grp->settings[n].flags & |
| 121 | (MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) { |
| 122 | if (!pctl->variant || (pctl->variant & |
| 123 | grp->settings[n].variant)) |
| 124 | return &grp->settings[n]; |
| 125 | } |
| 126 | } |
| 127 | return NULL; |
| 128 | } |
| 129 | |
| 130 | static struct mvebu_pinctrl_function *mvebu_pinctrl_find_function_by_name( |
| 131 | struct mvebu_pinctrl *pctl, const char *name) |
| 132 | { |
| 133 | unsigned n; |
| 134 | for (n = 0; n < pctl->num_functions; n++) { |
| 135 | if (strcmp(name, pctl->functions[n].name) == 0) |
| 136 | return &pctl->functions[n]; |
| 137 | } |
| 138 | return NULL; |
| 139 | } |
| 140 | |
| 141 | /* |
| 142 | * Common mpp pin configuration registers on MVEBU are |
| 143 | * registers of eight 4-bit values for each mpp setting. |
| 144 | * Register offset and bit mask are calculated accordingly below. |
| 145 | */ |
| 146 | static int mvebu_common_mpp_get(struct mvebu_pinctrl *pctl, |
| 147 | struct mvebu_pinctrl_group *grp, |
| 148 | unsigned long *config) |
| 149 | { |
| 150 | unsigned pin = grp->gid; |
| 151 | unsigned off = (pin / MPPS_PER_REG) * MPP_BITS; |
| 152 | unsigned shift = (pin % MPPS_PER_REG) * MPP_BITS; |
| 153 | |
| 154 | *config = readl(pctl->base + off); |
| 155 | *config >>= shift; |
| 156 | *config &= MPP_MASK; |
| 157 | |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | static int mvebu_common_mpp_set(struct mvebu_pinctrl *pctl, |
| 162 | struct mvebu_pinctrl_group *grp, |
| 163 | unsigned long config) |
| 164 | { |
| 165 | unsigned pin = grp->gid; |
| 166 | unsigned off = (pin / MPPS_PER_REG) * MPP_BITS; |
| 167 | unsigned shift = (pin % MPPS_PER_REG) * MPP_BITS; |
| 168 | unsigned long reg; |
| 169 | |
| 170 | reg = readl(pctl->base + off); |
| 171 | reg &= ~(MPP_MASK << shift); |
| 172 | reg |= (config << shift); |
| 173 | writel(reg, pctl->base + off); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static int mvebu_pinconf_group_get(struct pinctrl_dev *pctldev, |
| 179 | unsigned gid, unsigned long *config) |
| 180 | { |
| 181 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 182 | struct mvebu_pinctrl_group *grp = &pctl->groups[gid]; |
| 183 | |
| 184 | if (!grp->ctrl) |
| 185 | return -EINVAL; |
| 186 | |
| 187 | if (grp->ctrl->mpp_get) |
| 188 | return grp->ctrl->mpp_get(grp->ctrl, config); |
| 189 | |
| 190 | return mvebu_common_mpp_get(pctl, grp, config); |
| 191 | } |
| 192 | |
| 193 | static int mvebu_pinconf_group_set(struct pinctrl_dev *pctldev, |
| 194 | unsigned gid, unsigned long config) |
| 195 | { |
| 196 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 197 | struct mvebu_pinctrl_group *grp = &pctl->groups[gid]; |
| 198 | |
| 199 | if (!grp->ctrl) |
| 200 | return -EINVAL; |
| 201 | |
| 202 | if (grp->ctrl->mpp_set) |
| 203 | return grp->ctrl->mpp_set(grp->ctrl, config); |
| 204 | |
| 205 | return mvebu_common_mpp_set(pctl, grp, config); |
| 206 | } |
| 207 | |
| 208 | static void mvebu_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, |
| 209 | struct seq_file *s, unsigned gid) |
| 210 | { |
| 211 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 212 | struct mvebu_pinctrl_group *grp = &pctl->groups[gid]; |
| 213 | struct mvebu_mpp_ctrl_setting *curr; |
| 214 | unsigned long config; |
| 215 | unsigned n; |
| 216 | |
| 217 | if (mvebu_pinconf_group_get(pctldev, gid, &config)) |
| 218 | return; |
| 219 | |
| 220 | curr = mvebu_pinctrl_find_setting_by_val(pctl, grp, config); |
| 221 | |
| 222 | if (curr) { |
| 223 | seq_printf(s, "current: %s", curr->name); |
| 224 | if (curr->subname) |
| 225 | seq_printf(s, "(%s)", curr->subname); |
| 226 | if (curr->flags & (MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) { |
| 227 | seq_printf(s, "("); |
| 228 | if (curr->flags & MVEBU_SETTING_GPI) |
| 229 | seq_printf(s, "i"); |
| 230 | if (curr->flags & MVEBU_SETTING_GPO) |
| 231 | seq_printf(s, "o"); |
| 232 | seq_printf(s, ")"); |
| 233 | } |
| 234 | } else |
| 235 | seq_printf(s, "current: UNKNOWN"); |
| 236 | |
| 237 | if (grp->num_settings > 1) { |
| 238 | seq_printf(s, ", available = ["); |
| 239 | for (n = 0; n < grp->num_settings; n++) { |
| 240 | if (curr == &grp->settings[n]) |
| 241 | continue; |
| 242 | |
| 243 | /* skip unsupported settings for this variant */ |
| 244 | if (pctl->variant && |
| 245 | !(pctl->variant & grp->settings[n].variant)) |
| 246 | continue; |
| 247 | |
| 248 | seq_printf(s, " %s", grp->settings[n].name); |
| 249 | if (grp->settings[n].subname) |
| 250 | seq_printf(s, "(%s)", grp->settings[n].subname); |
| 251 | if (grp->settings[n].flags & |
| 252 | (MVEBU_SETTING_GPO | MVEBU_SETTING_GPI)) { |
| 253 | seq_printf(s, "("); |
| 254 | if (grp->settings[n].flags & MVEBU_SETTING_GPI) |
| 255 | seq_printf(s, "i"); |
| 256 | if (grp->settings[n].flags & MVEBU_SETTING_GPO) |
| 257 | seq_printf(s, "o"); |
| 258 | seq_printf(s, ")"); |
| 259 | } |
| 260 | } |
| 261 | seq_printf(s, " ]"); |
| 262 | } |
| 263 | return; |
| 264 | } |
| 265 | |
| 266 | static struct pinconf_ops mvebu_pinconf_ops = { |
| 267 | .pin_config_group_get = mvebu_pinconf_group_get, |
| 268 | .pin_config_group_set = mvebu_pinconf_group_set, |
| 269 | .pin_config_group_dbg_show = mvebu_pinconf_group_dbg_show, |
| 270 | }; |
| 271 | |
| 272 | static int mvebu_pinmux_get_funcs_count(struct pinctrl_dev *pctldev) |
| 273 | { |
| 274 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 275 | |
| 276 | return pctl->num_functions; |
| 277 | } |
| 278 | |
| 279 | static const char *mvebu_pinmux_get_func_name(struct pinctrl_dev *pctldev, |
| 280 | unsigned fid) |
| 281 | { |
| 282 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 283 | |
| 284 | return pctl->functions[fid].name; |
| 285 | } |
| 286 | |
| 287 | static int mvebu_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned fid, |
| 288 | const char * const **groups, |
| 289 | unsigned * const num_groups) |
| 290 | { |
| 291 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 292 | |
| 293 | *groups = pctl->functions[fid].groups; |
| 294 | *num_groups = pctl->functions[fid].num_groups; |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static int mvebu_pinmux_enable(struct pinctrl_dev *pctldev, unsigned fid, |
| 299 | unsigned gid) |
| 300 | { |
| 301 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 302 | struct mvebu_pinctrl_function *func = &pctl->functions[fid]; |
| 303 | struct mvebu_pinctrl_group *grp = &pctl->groups[gid]; |
| 304 | struct mvebu_mpp_ctrl_setting *setting; |
| 305 | int ret; |
| 306 | |
| 307 | setting = mvebu_pinctrl_find_setting_by_name(pctl, grp, |
| 308 | func->name); |
| 309 | if (!setting) { |
| 310 | dev_err(pctl->dev, |
| 311 | "unable to find setting %s in group %s\n", |
| 312 | func->name, func->groups[gid]); |
| 313 | return -EINVAL; |
| 314 | } |
| 315 | |
| 316 | ret = mvebu_pinconf_group_set(pctldev, grp->gid, setting->val); |
| 317 | if (ret) { |
| 318 | dev_err(pctl->dev, "cannot set group %s to %s\n", |
| 319 | func->groups[gid], func->name); |
| 320 | return ret; |
| 321 | } |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | static int mvebu_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 327 | struct pinctrl_gpio_range *range, unsigned offset) |
| 328 | { |
| 329 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 330 | struct mvebu_pinctrl_group *grp; |
| 331 | struct mvebu_mpp_ctrl_setting *setting; |
| 332 | |
| 333 | grp = mvebu_pinctrl_find_group_by_pid(pctl, offset); |
| 334 | if (!grp) |
| 335 | return -EINVAL; |
| 336 | |
| 337 | if (grp->ctrl->mpp_gpio_req) |
| 338 | return grp->ctrl->mpp_gpio_req(grp->ctrl, offset); |
| 339 | |
| 340 | setting = mvebu_pinctrl_find_gpio_setting(pctl, grp); |
| 341 | if (!setting) |
| 342 | return -ENOTSUPP; |
| 343 | |
| 344 | return mvebu_pinconf_group_set(pctldev, grp->gid, setting->val); |
| 345 | } |
| 346 | |
| 347 | static int mvebu_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 348 | struct pinctrl_gpio_range *range, unsigned offset, bool input) |
| 349 | { |
| 350 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 351 | struct mvebu_pinctrl_group *grp; |
| 352 | struct mvebu_mpp_ctrl_setting *setting; |
| 353 | |
| 354 | grp = mvebu_pinctrl_find_group_by_pid(pctl, offset); |
| 355 | if (!grp) |
| 356 | return -EINVAL; |
| 357 | |
| 358 | if (grp->ctrl->mpp_gpio_dir) |
| 359 | return grp->ctrl->mpp_gpio_dir(grp->ctrl, offset, input); |
| 360 | |
| 361 | setting = mvebu_pinctrl_find_gpio_setting(pctl, grp); |
| 362 | if (!setting) |
| 363 | return -ENOTSUPP; |
| 364 | |
| 365 | if ((input && (setting->flags & MVEBU_SETTING_GPI)) || |
| 366 | (!input && (setting->flags & MVEBU_SETTING_GPO))) |
| 367 | return 0; |
| 368 | |
| 369 | return -ENOTSUPP; |
| 370 | } |
| 371 | |
| 372 | static struct pinmux_ops mvebu_pinmux_ops = { |
| 373 | .get_functions_count = mvebu_pinmux_get_funcs_count, |
| 374 | .get_function_name = mvebu_pinmux_get_func_name, |
| 375 | .get_function_groups = mvebu_pinmux_get_groups, |
| 376 | .gpio_request_enable = mvebu_pinmux_gpio_request_enable, |
| 377 | .gpio_set_direction = mvebu_pinmux_gpio_set_direction, |
| 378 | .enable = mvebu_pinmux_enable, |
| 379 | }; |
| 380 | |
| 381 | static int mvebu_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) |
| 382 | { |
| 383 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 384 | return pctl->num_groups; |
| 385 | } |
| 386 | |
| 387 | static const char *mvebu_pinctrl_get_group_name(struct pinctrl_dev *pctldev, |
| 388 | unsigned gid) |
| 389 | { |
| 390 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 391 | return pctl->groups[gid].name; |
| 392 | } |
| 393 | |
| 394 | static int mvebu_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, |
| 395 | unsigned gid, const unsigned **pins, |
| 396 | unsigned *num_pins) |
| 397 | { |
| 398 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 399 | *pins = pctl->groups[gid].pins; |
| 400 | *num_pins = pctl->groups[gid].npins; |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int mvebu_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 405 | struct device_node *np, |
| 406 | struct pinctrl_map **map, |
| 407 | unsigned *num_maps) |
| 408 | { |
| 409 | struct mvebu_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| 410 | struct property *prop; |
| 411 | const char *function; |
| 412 | const char *group; |
| 413 | int ret, nmaps, n; |
| 414 | |
| 415 | *map = NULL; |
| 416 | *num_maps = 0; |
| 417 | |
| 418 | ret = of_property_read_string(np, "marvell,function", &function); |
| 419 | if (ret) { |
| 420 | dev_err(pctl->dev, |
| 421 | "missing marvell,function in node %s\n", np->name); |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | nmaps = of_property_count_strings(np, "marvell,pins"); |
| 426 | if (nmaps < 0) { |
| 427 | dev_err(pctl->dev, |
| 428 | "missing marvell,pins in node %s\n", np->name); |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | *map = kmalloc(nmaps * sizeof(struct pinctrl_map), GFP_KERNEL); |
| 433 | if (map == NULL) { |
| 434 | dev_err(pctl->dev, |
| 435 | "cannot allocate pinctrl_map memory for %s\n", |
| 436 | np->name); |
| 437 | return -ENOMEM; |
| 438 | } |
| 439 | |
| 440 | n = 0; |
| 441 | of_property_for_each_string(np, "marvell,pins", prop, group) { |
| 442 | struct mvebu_pinctrl_group *grp = |
| 443 | mvebu_pinctrl_find_group_by_name(pctl, group); |
| 444 | |
| 445 | if (!grp) { |
| 446 | dev_err(pctl->dev, "unknown pin %s", group); |
| 447 | continue; |
| 448 | } |
| 449 | |
| 450 | if (!mvebu_pinctrl_find_setting_by_name(pctl, grp, function)) { |
| 451 | dev_err(pctl->dev, "unsupported function %s on pin %s", |
| 452 | function, group); |
| 453 | continue; |
| 454 | } |
| 455 | |
| 456 | (*map)[n].type = PIN_MAP_TYPE_MUX_GROUP; |
| 457 | (*map)[n].data.mux.group = group; |
| 458 | (*map)[n].data.mux.function = function; |
| 459 | n++; |
| 460 | } |
| 461 | |
| 462 | *num_maps = nmaps; |
| 463 | |
| 464 | return 0; |
| 465 | } |
| 466 | |
| 467 | static void mvebu_pinctrl_dt_free_map(struct pinctrl_dev *pctldev, |
| 468 | struct pinctrl_map *map, unsigned num_maps) |
| 469 | { |
| 470 | kfree(map); |
| 471 | } |
| 472 | |
| 473 | static struct pinctrl_ops mvebu_pinctrl_ops = { |
| 474 | .get_groups_count = mvebu_pinctrl_get_groups_count, |
| 475 | .get_group_name = mvebu_pinctrl_get_group_name, |
| 476 | .get_group_pins = mvebu_pinctrl_get_group_pins, |
| 477 | .dt_node_to_map = mvebu_pinctrl_dt_node_to_map, |
| 478 | .dt_free_map = mvebu_pinctrl_dt_free_map, |
| 479 | }; |
| 480 | |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 481 | static int _add_function(struct mvebu_pinctrl_function *funcs, const char *name) |
Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 482 | { |
| 483 | while (funcs->num_groups) { |
| 484 | /* function already there */ |
| 485 | if (strcmp(funcs->name, name) == 0) { |
| 486 | funcs->num_groups++; |
| 487 | return -EEXIST; |
| 488 | } |
| 489 | funcs++; |
| 490 | } |
| 491 | funcs->name = name; |
| 492 | funcs->num_groups = 1; |
| 493 | return 0; |
| 494 | } |
| 495 | |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 496 | static int mvebu_pinctrl_build_functions(struct platform_device *pdev, |
| 497 | struct mvebu_pinctrl *pctl) |
Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 498 | { |
| 499 | struct mvebu_pinctrl_function *funcs; |
| 500 | int num = 0; |
| 501 | int n, s; |
| 502 | |
| 503 | /* we allocate functions for number of pins and hope |
| 504 | * there are less unique functions than pins available */ |
| 505 | funcs = devm_kzalloc(&pdev->dev, pctl->desc.npins * |
| 506 | sizeof(struct mvebu_pinctrl_function), GFP_KERNEL); |
| 507 | if (!funcs) |
| 508 | return -ENOMEM; |
| 509 | |
| 510 | for (n = 0; n < pctl->num_groups; n++) { |
| 511 | struct mvebu_pinctrl_group *grp = &pctl->groups[n]; |
| 512 | for (s = 0; s < grp->num_settings; s++) { |
| 513 | /* skip unsupported settings on this variant */ |
| 514 | if (pctl->variant && |
| 515 | !(pctl->variant & grp->settings[s].variant)) |
| 516 | continue; |
| 517 | |
| 518 | /* check for unique functions and count groups */ |
| 519 | if (_add_function(funcs, grp->settings[s].name)) |
| 520 | continue; |
| 521 | |
| 522 | num++; |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | /* with the number of unique functions and it's groups known, |
| 527 | reallocate functions and assign group names */ |
| 528 | funcs = krealloc(funcs, num * sizeof(struct mvebu_pinctrl_function), |
| 529 | GFP_KERNEL); |
| 530 | if (!funcs) |
| 531 | return -ENOMEM; |
| 532 | |
| 533 | pctl->num_functions = num; |
| 534 | pctl->functions = funcs; |
| 535 | |
| 536 | for (n = 0; n < pctl->num_groups; n++) { |
| 537 | struct mvebu_pinctrl_group *grp = &pctl->groups[n]; |
| 538 | for (s = 0; s < grp->num_settings; s++) { |
| 539 | struct mvebu_pinctrl_function *f; |
| 540 | const char **groups; |
| 541 | |
| 542 | /* skip unsupported settings on this variant */ |
| 543 | if (pctl->variant && |
| 544 | !(pctl->variant & grp->settings[s].variant)) |
| 545 | continue; |
| 546 | |
| 547 | f = mvebu_pinctrl_find_function_by_name(pctl, |
| 548 | grp->settings[s].name); |
| 549 | |
| 550 | /* allocate group name array if not done already */ |
| 551 | if (!f->groups) { |
| 552 | f->groups = devm_kzalloc(&pdev->dev, |
| 553 | f->num_groups * sizeof(char *), |
| 554 | GFP_KERNEL); |
| 555 | if (!f->groups) |
| 556 | return -ENOMEM; |
| 557 | } |
| 558 | |
| 559 | /* find next free group name and assign current name */ |
| 560 | groups = f->groups; |
| 561 | while (*groups) |
| 562 | groups++; |
| 563 | *groups = grp->name; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | return 0; |
| 568 | } |
| 569 | |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 570 | int mvebu_pinctrl_probe(struct platform_device *pdev) |
Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 571 | { |
| 572 | struct mvebu_pinctrl_soc_info *soc = dev_get_platdata(&pdev->dev); |
| 573 | struct device_node *np = pdev->dev.of_node; |
| 574 | struct mvebu_pinctrl *pctl; |
| 575 | void __iomem *base; |
| 576 | struct pinctrl_pin_desc *pdesc; |
| 577 | unsigned gid, n, k; |
| 578 | int ret; |
| 579 | |
| 580 | if (!soc || !soc->controls || !soc->modes) { |
| 581 | dev_err(&pdev->dev, "wrong pinctrl soc info\n"); |
| 582 | return -EINVAL; |
| 583 | } |
| 584 | |
| 585 | base = of_iomap(np, 0); |
| 586 | if (!base) { |
| 587 | dev_err(&pdev->dev, "unable to get base address\n"); |
| 588 | return -ENODEV; |
| 589 | } |
| 590 | |
| 591 | pctl = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_pinctrl), |
| 592 | GFP_KERNEL); |
| 593 | if (!pctl) { |
| 594 | dev_err(&pdev->dev, "unable to alloc driver\n"); |
| 595 | return -ENOMEM; |
| 596 | } |
| 597 | |
| 598 | pctl->desc.name = dev_name(&pdev->dev); |
| 599 | pctl->desc.owner = THIS_MODULE; |
| 600 | pctl->desc.pctlops = &mvebu_pinctrl_ops; |
| 601 | pctl->desc.pmxops = &mvebu_pinmux_ops; |
| 602 | pctl->desc.confops = &mvebu_pinconf_ops; |
| 603 | pctl->variant = soc->variant; |
| 604 | pctl->base = base; |
| 605 | pctl->dev = &pdev->dev; |
| 606 | platform_set_drvdata(pdev, pctl); |
| 607 | |
| 608 | /* count controls and create names for mvebu generic |
| 609 | register controls; also does sanity checks */ |
| 610 | pctl->num_groups = 0; |
| 611 | pctl->desc.npins = 0; |
| 612 | for (n = 0; n < soc->ncontrols; n++) { |
| 613 | struct mvebu_mpp_ctrl *ctrl = &soc->controls[n]; |
| 614 | char *names; |
| 615 | |
| 616 | pctl->desc.npins += ctrl->npins; |
| 617 | /* initial control pins */ |
| 618 | for (k = 0; k < ctrl->npins; k++) |
| 619 | ctrl->pins[k] = ctrl->pid + k; |
| 620 | |
| 621 | /* special soc specific control */ |
| 622 | if (ctrl->mpp_get || ctrl->mpp_set) { |
| 623 | if (!ctrl->name || !ctrl->mpp_set || !ctrl->mpp_set) { |
| 624 | dev_err(&pdev->dev, "wrong soc control info\n"); |
| 625 | return -EINVAL; |
| 626 | } |
| 627 | pctl->num_groups += 1; |
| 628 | continue; |
| 629 | } |
| 630 | |
| 631 | /* generic mvebu register control */ |
| 632 | names = devm_kzalloc(&pdev->dev, ctrl->npins * 8, GFP_KERNEL); |
| 633 | if (!names) { |
| 634 | dev_err(&pdev->dev, "failed to alloc mpp names\n"); |
| 635 | return -ENOMEM; |
| 636 | } |
| 637 | for (k = 0; k < ctrl->npins; k++) |
| 638 | sprintf(names + 8*k, "mpp%d", ctrl->pid+k); |
| 639 | ctrl->name = names; |
| 640 | pctl->num_groups += ctrl->npins; |
| 641 | } |
| 642 | |
| 643 | pdesc = devm_kzalloc(&pdev->dev, pctl->desc.npins * |
| 644 | sizeof(struct pinctrl_pin_desc), GFP_KERNEL); |
| 645 | if (!pdesc) { |
| 646 | dev_err(&pdev->dev, "failed to alloc pinctrl pins\n"); |
| 647 | return -ENOMEM; |
| 648 | } |
| 649 | |
| 650 | for (n = 0; n < pctl->desc.npins; n++) |
| 651 | pdesc[n].number = n; |
| 652 | pctl->desc.pins = pdesc; |
| 653 | |
| 654 | pctl->groups = devm_kzalloc(&pdev->dev, pctl->num_groups * |
| 655 | sizeof(struct mvebu_pinctrl_group), GFP_KERNEL); |
| 656 | if (!pctl->groups) { |
| 657 | dev_err(&pdev->dev, "failed to alloc pinctrl groups\n"); |
| 658 | return -ENOMEM; |
| 659 | } |
| 660 | |
| 661 | /* assign mpp controls to groups */ |
| 662 | gid = 0; |
| 663 | for (n = 0; n < soc->ncontrols; n++) { |
| 664 | struct mvebu_mpp_ctrl *ctrl = &soc->controls[n]; |
| 665 | pctl->groups[gid].gid = gid; |
| 666 | pctl->groups[gid].ctrl = ctrl; |
| 667 | pctl->groups[gid].name = ctrl->name; |
| 668 | pctl->groups[gid].pins = ctrl->pins; |
| 669 | pctl->groups[gid].npins = ctrl->npins; |
| 670 | |
| 671 | /* generic mvebu register control maps to a number of groups */ |
| 672 | if (!ctrl->mpp_get && !ctrl->mpp_set) { |
| 673 | pctl->groups[gid].npins = 1; |
| 674 | |
| 675 | for (k = 1; k < ctrl->npins; k++) { |
| 676 | gid++; |
| 677 | pctl->groups[gid].gid = gid; |
| 678 | pctl->groups[gid].ctrl = ctrl; |
| 679 | pctl->groups[gid].name = &ctrl->name[8*k]; |
| 680 | pctl->groups[gid].pins = &ctrl->pins[k]; |
| 681 | pctl->groups[gid].npins = 1; |
| 682 | } |
| 683 | } |
| 684 | gid++; |
| 685 | } |
| 686 | |
| 687 | /* assign mpp modes to groups */ |
| 688 | for (n = 0; n < soc->nmodes; n++) { |
| 689 | struct mvebu_mpp_mode *mode = &soc->modes[n]; |
| 690 | struct mvebu_pinctrl_group *grp = |
| 691 | mvebu_pinctrl_find_group_by_pid(pctl, mode->pid); |
| 692 | unsigned num_settings; |
| 693 | |
| 694 | if (!grp) { |
| 695 | dev_warn(&pdev->dev, "unknown pinctrl group %d\n", |
| 696 | mode->pid); |
| 697 | continue; |
| 698 | } |
| 699 | |
| 700 | for (num_settings = 0; ;) { |
| 701 | struct mvebu_mpp_ctrl_setting *set = |
| 702 | &mode->settings[num_settings]; |
| 703 | |
| 704 | if (!set->name) |
| 705 | break; |
| 706 | num_settings++; |
| 707 | |
| 708 | /* skip unsupported settings for this variant */ |
| 709 | if (pctl->variant && !(pctl->variant & set->variant)) |
| 710 | continue; |
| 711 | |
| 712 | /* find gpio/gpo/gpi settings */ |
| 713 | if (strcmp(set->name, "gpio") == 0) |
| 714 | set->flags = MVEBU_SETTING_GPI | |
| 715 | MVEBU_SETTING_GPO; |
| 716 | else if (strcmp(set->name, "gpo") == 0) |
| 717 | set->flags = MVEBU_SETTING_GPO; |
| 718 | else if (strcmp(set->name, "gpi") == 0) |
| 719 | set->flags = MVEBU_SETTING_GPI; |
| 720 | } |
| 721 | |
| 722 | grp->settings = mode->settings; |
| 723 | grp->num_settings = num_settings; |
| 724 | } |
| 725 | |
| 726 | ret = mvebu_pinctrl_build_functions(pdev, pctl); |
| 727 | if (ret) { |
| 728 | dev_err(&pdev->dev, "unable to build functions\n"); |
| 729 | return ret; |
| 730 | } |
| 731 | |
| 732 | pctl->pctldev = pinctrl_register(&pctl->desc, &pdev->dev, pctl); |
| 733 | if (!pctl->pctldev) { |
| 734 | dev_err(&pdev->dev, "unable to register pinctrl driver\n"); |
| 735 | return -EINVAL; |
| 736 | } |
| 737 | |
| 738 | dev_info(&pdev->dev, "registered pinctrl driver\n"); |
| 739 | |
| 740 | /* register gpio ranges */ |
| 741 | for (n = 0; n < soc->ngpioranges; n++) |
| 742 | pinctrl_add_gpio_range(pctl->pctldev, &soc->gpioranges[n]); |
| 743 | |
| 744 | return 0; |
| 745 | } |
| 746 | |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 747 | int mvebu_pinctrl_remove(struct platform_device *pdev) |
Sebastian Hesselbarth | 7e8d941 | 2012-09-13 17:41:43 +0200 | [diff] [blame] | 748 | { |
| 749 | struct mvebu_pinctrl *pctl = platform_get_drvdata(pdev); |
| 750 | pinctrl_unregister(pctl->pctldev); |
| 751 | return 0; |
| 752 | } |