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 | |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 11 | #define DRV_NAME "sh-pfc" |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 12 | |
Laurent Pinchart | 1724acf | 2012-12-15 23:50:48 +0100 | [diff] [blame] | 13 | #include <linux/device.h> |
Laurent Pinchart | 90efde2 | 2012-12-15 23:50:52 +0100 | [diff] [blame] | 14 | #include <linux/err.h> |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 15 | #include <linux/init.h> |
| 16 | #include <linux/module.h> |
Laurent Pinchart | fe1c9a8 | 2013-06-17 20:50:02 +0200 | [diff] [blame^] | 17 | #include <linux/of.h> |
Laurent Pinchart | 90efde2 | 2012-12-15 23:50:52 +0100 | [diff] [blame] | 18 | #include <linux/pinctrl/consumer.h> |
Laurent Pinchart | fe1c9a8 | 2013-06-17 20:50:02 +0200 | [diff] [blame^] | 19 | #include <linux/pinctrl/machine.h> |
Laurent Pinchart | 90efde2 | 2012-12-15 23:50:52 +0100 | [diff] [blame] | 20 | #include <linux/pinctrl/pinconf.h> |
| 21 | #include <linux/pinctrl/pinconf-generic.h> |
| 22 | #include <linux/pinctrl/pinctrl.h> |
| 23 | #include <linux/pinctrl/pinmux.h> |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 25 | #include <linux/spinlock.h> |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 26 | |
Laurent Pinchart | f916513 | 2012-12-15 23:50:44 +0100 | [diff] [blame] | 27 | #include "core.h" |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 28 | #include "../core.h" |
| 29 | #include "../pinconf.h" |
Laurent Pinchart | f916513 | 2012-12-15 23:50:44 +0100 | [diff] [blame] | 30 | |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 31 | struct sh_pfc_pin_config { |
| 32 | u32 type; |
| 33 | }; |
| 34 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 35 | struct sh_pfc_pinctrl { |
| 36 | struct pinctrl_dev *pctl; |
Laurent Pinchart | dcc427e | 2013-02-16 16:38:30 +0100 | [diff] [blame] | 37 | struct pinctrl_desc pctl_desc; |
Laurent Pinchart | dcc427e | 2013-02-16 16:38:30 +0100 | [diff] [blame] | 38 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 39 | struct sh_pfc *pfc; |
| 40 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 41 | struct pinctrl_pin_desc *pins; |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 42 | struct sh_pfc_pin_config *configs; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 43 | }; |
| 44 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 45 | static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 46 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 47 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 48 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 49 | return pmx->pfc->info->nr_groups; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 50 | } |
| 51 | |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 52 | static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 53 | unsigned selector) |
| 54 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 55 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 56 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 57 | return pmx->pfc->info->groups[selector].name; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 58 | } |
| 59 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 60 | static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 61 | const unsigned **pins, unsigned *num_pins) |
| 62 | { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 63 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 64 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 65 | *pins = pmx->pfc->info->groups[selector].pins; |
| 66 | *num_pins = pmx->pfc->info->groups[selector].nr_pins; |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 67 | |
| 68 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 69 | } |
| 70 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 71 | static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, |
| 72 | unsigned offset) |
| 73 | { |
| 74 | seq_printf(s, "%s", DRV_NAME); |
| 75 | } |
| 76 | |
Laurent Pinchart | fe1c9a8 | 2013-06-17 20:50:02 +0200 | [diff] [blame^] | 77 | static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, |
| 78 | struct pinctrl_map **map, |
| 79 | unsigned int *num_maps, unsigned int *index) |
| 80 | { |
| 81 | struct pinctrl_map *maps = *map; |
| 82 | unsigned int nmaps = *num_maps; |
| 83 | unsigned int idx = *index; |
| 84 | const char *function = NULL; |
| 85 | struct property *prop; |
| 86 | const char *group; |
| 87 | int ret; |
| 88 | |
| 89 | /* Parse the function and configuration properties. At least a function |
| 90 | * or one configuration must be specified. |
| 91 | */ |
| 92 | ret = of_property_read_string(np, "renesas,function", &function); |
| 93 | if (ret < 0 && ret != -EINVAL) { |
| 94 | dev_err(dev, "Invalid function in DT\n"); |
| 95 | return ret; |
| 96 | } |
| 97 | |
| 98 | if (!function) { |
| 99 | dev_err(dev, "DT node must contain at least one function\n"); |
| 100 | goto done; |
| 101 | } |
| 102 | |
| 103 | /* Count the number of groups and reallocate mappings. */ |
| 104 | ret = of_property_count_strings(np, "renesas,groups"); |
| 105 | if (ret < 0 && ret != -EINVAL) { |
| 106 | dev_err(dev, "Invalid pin groups list in DT\n"); |
| 107 | goto done; |
| 108 | } |
| 109 | |
| 110 | if (!ret) { |
| 111 | dev_err(dev, "No group provided in DT node\n"); |
| 112 | ret = -ENODEV; |
| 113 | goto done; |
| 114 | } |
| 115 | |
| 116 | nmaps += ret; |
| 117 | |
| 118 | maps = krealloc(maps, sizeof(*maps) * nmaps, GFP_KERNEL); |
| 119 | if (maps == NULL) { |
| 120 | ret = -ENOMEM; |
| 121 | goto done; |
| 122 | } |
| 123 | |
| 124 | *map = maps; |
| 125 | *num_maps = nmaps; |
| 126 | |
| 127 | /* Iterate over pins and groups and create the mappings. */ |
| 128 | of_property_for_each_string(np, "renesas,groups", prop, group) { |
| 129 | maps[idx].type = PIN_MAP_TYPE_MUX_GROUP; |
| 130 | maps[idx].data.mux.group = group; |
| 131 | maps[idx].data.mux.function = function; |
| 132 | idx++; |
| 133 | } |
| 134 | |
| 135 | ret = 0; |
| 136 | |
| 137 | done: |
| 138 | *index = idx; |
| 139 | return ret; |
| 140 | } |
| 141 | |
| 142 | static void sh_pfc_dt_free_map(struct pinctrl_dev *pctldev, |
| 143 | struct pinctrl_map *map, unsigned num_maps) |
| 144 | { |
| 145 | kfree(map); |
| 146 | } |
| 147 | |
| 148 | static int sh_pfc_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 149 | struct device_node *np, |
| 150 | struct pinctrl_map **map, unsigned *num_maps) |
| 151 | { |
| 152 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 153 | struct device *dev = pmx->pfc->dev; |
| 154 | struct device_node *child; |
| 155 | unsigned int index; |
| 156 | int ret; |
| 157 | |
| 158 | *map = NULL; |
| 159 | *num_maps = 0; |
| 160 | index = 0; |
| 161 | |
| 162 | for_each_child_of_node(np, child) { |
| 163 | ret = sh_pfc_dt_subnode_to_map(dev, child, map, num_maps, |
| 164 | &index); |
| 165 | if (ret < 0) |
| 166 | goto done; |
| 167 | } |
| 168 | |
| 169 | /* If no mapping has been found in child nodes try the config node. */ |
| 170 | if (*num_maps == 0) { |
| 171 | ret = sh_pfc_dt_subnode_to_map(dev, np, map, num_maps, &index); |
| 172 | if (ret < 0) |
| 173 | goto done; |
| 174 | } |
| 175 | |
| 176 | if (*num_maps) |
| 177 | return 0; |
| 178 | |
| 179 | dev_err(dev, "no mapping found in node %s\n", np->full_name); |
| 180 | ret = -EINVAL; |
| 181 | |
| 182 | done: |
| 183 | if (ret < 0) |
| 184 | sh_pfc_dt_free_map(pctldev, *map, *num_maps); |
| 185 | |
| 186 | return ret; |
| 187 | } |
| 188 | |
Laurent Pinchart | fe330ce | 2013-02-15 16:04:47 +0100 | [diff] [blame] | 189 | static const struct pinctrl_ops sh_pfc_pinctrl_ops = { |
Paul Mundt | e3f805e | 2012-07-17 15:48:18 +0900 | [diff] [blame] | 190 | .get_groups_count = sh_pfc_get_groups_count, |
| 191 | .get_group_name = sh_pfc_get_group_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 192 | .get_group_pins = sh_pfc_get_group_pins, |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 193 | .pin_dbg_show = sh_pfc_pin_dbg_show, |
Laurent Pinchart | fe1c9a8 | 2013-06-17 20:50:02 +0200 | [diff] [blame^] | 194 | .dt_node_to_map = sh_pfc_dt_node_to_map, |
| 195 | .dt_free_map = sh_pfc_dt_free_map, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 196 | }; |
| 197 | |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 198 | static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) |
| 199 | { |
| 200 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 201 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 202 | return pmx->pfc->info->nr_functions; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, |
| 206 | unsigned selector) |
| 207 | { |
| 208 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 209 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 210 | return pmx->pfc->info->functions[selector].name; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 211 | } |
| 212 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 213 | static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, |
| 214 | unsigned selector, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 215 | const char * const **groups, |
| 216 | unsigned * const num_groups) |
| 217 | { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 218 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 219 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 220 | *groups = pmx->pfc->info->functions[selector].groups; |
| 221 | *num_groups = pmx->pfc->info->functions[selector].nr_groups; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 222 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 223 | return 0; |
| 224 | } |
| 225 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 226 | static int sh_pfc_func_enable(struct pinctrl_dev *pctldev, unsigned selector, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 227 | unsigned group) |
| 228 | { |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 229 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 230 | struct sh_pfc *pfc = pmx->pfc; |
| 231 | const struct sh_pfc_pin_group *grp = &pfc->info->groups[group]; |
| 232 | unsigned long flags; |
| 233 | unsigned int i; |
Laurent Pinchart | b705c05 | 2013-03-10 16:38:23 +0100 | [diff] [blame] | 234 | int ret = 0; |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 235 | |
| 236 | spin_lock_irqsave(&pfc->lock, flags); |
| 237 | |
| 238 | for (i = 0; i < grp->nr_pins; ++i) { |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 239 | int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]); |
| 240 | struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; |
| 241 | |
| 242 | if (cfg->type != PINMUX_TYPE_NONE) { |
| 243 | ret = -EBUSY; |
| 244 | goto done; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | for (i = 0; i < grp->nr_pins; ++i) { |
Laurent Pinchart | b705c05 | 2013-03-10 16:38:23 +0100 | [diff] [blame] | 249 | ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION); |
| 250 | if (ret < 0) |
| 251 | break; |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 252 | } |
| 253 | |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 254 | done: |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 255 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 256 | return ret; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 257 | } |
| 258 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 259 | static void sh_pfc_func_disable(struct pinctrl_dev *pctldev, unsigned selector, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 260 | unsigned group) |
| 261 | { |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 262 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 263 | struct sh_pfc *pfc = pmx->pfc; |
| 264 | const struct sh_pfc_pin_group *grp = &pfc->info->groups[group]; |
| 265 | unsigned long flags; |
| 266 | unsigned int i; |
| 267 | |
| 268 | spin_lock_irqsave(&pfc->lock, flags); |
| 269 | |
| 270 | for (i = 0; i < grp->nr_pins; ++i) { |
| 271 | int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]); |
| 272 | struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; |
| 273 | |
| 274 | cfg->type = PINMUX_TYPE_NONE; |
| 275 | } |
| 276 | |
| 277 | spin_unlock_irqrestore(&pfc->lock, flags); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, |
| 281 | struct pinctrl_gpio_range *range, |
| 282 | unsigned offset) |
| 283 | { |
| 284 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 285 | struct sh_pfc *pfc = pmx->pfc; |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 286 | int idx = sh_pfc_get_pin_index(pfc, offset); |
| 287 | struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 288 | unsigned long flags; |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 289 | int ret; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 290 | |
| 291 | spin_lock_irqsave(&pfc->lock, flags); |
| 292 | |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 293 | if (cfg->type != PINMUX_TYPE_NONE) { |
Laurent Pinchart | 9a643c9 | 2013-03-10 18:00:02 +0100 | [diff] [blame] | 294 | dev_err(pfc->dev, |
| 295 | "Pin %u is busy, can't configure it as GPIO.\n", |
| 296 | offset); |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 297 | ret = -EBUSY; |
| 298 | goto done; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 299 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 300 | |
Laurent Pinchart | e3c47051 | 2013-03-10 17:30:25 +0100 | [diff] [blame] | 301 | if (!pfc->gpio) { |
| 302 | /* If GPIOs are handled externally the pin mux type need to be |
| 303 | * set to GPIO here. |
| 304 | */ |
| 305 | const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; |
| 306 | |
| 307 | ret = sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO); |
| 308 | if (ret < 0) |
| 309 | goto done; |
| 310 | } |
| 311 | |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 312 | cfg->type = PINMUX_TYPE_GPIO; |
| 313 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 314 | ret = 0; |
| 315 | |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 316 | done: |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 317 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 318 | |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, |
| 323 | struct pinctrl_gpio_range *range, |
| 324 | unsigned offset) |
| 325 | { |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 326 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 327 | struct sh_pfc *pfc = pmx->pfc; |
| 328 | int idx = sh_pfc_get_pin_index(pfc, offset); |
| 329 | struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; |
| 330 | unsigned long flags; |
| 331 | |
| 332 | spin_lock_irqsave(&pfc->lock, flags); |
| 333 | cfg->type = PINMUX_TYPE_NONE; |
| 334 | spin_unlock_irqrestore(&pfc->lock, flags); |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, |
| 338 | struct pinctrl_gpio_range *range, |
| 339 | unsigned offset, bool input) |
| 340 | { |
| 341 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 342 | struct sh_pfc *pfc = pmx->pfc; |
| 343 | int new_type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; |
| 344 | int idx = sh_pfc_get_pin_index(pfc, offset); |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 345 | const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 346 | struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 347 | unsigned long flags; |
Laurent Pinchart | 6dc9b45 | 2013-03-13 18:18:30 +0100 | [diff] [blame] | 348 | unsigned int dir; |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 349 | int ret; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 350 | |
Laurent Pinchart | 6dc9b45 | 2013-03-13 18:18:30 +0100 | [diff] [blame] | 351 | /* Check if the requested direction is supported by the pin. Not all SoC |
| 352 | * provide pin config data, so perform the check conditionally. |
| 353 | */ |
| 354 | if (pin->configs) { |
| 355 | dir = input ? SH_PFC_PIN_CFG_INPUT : SH_PFC_PIN_CFG_OUTPUT; |
| 356 | if (!(pin->configs & dir)) |
| 357 | return -EINVAL; |
| 358 | } |
| 359 | |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 360 | spin_lock_irqsave(&pfc->lock, flags); |
| 361 | |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 362 | ret = sh_pfc_config_mux(pfc, pin->enum_id, new_type); |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 363 | if (ret < 0) |
| 364 | goto done; |
| 365 | |
| 366 | cfg->type = new_type; |
| 367 | |
| 368 | done: |
| 369 | spin_unlock_irqrestore(&pfc->lock, flags); |
Laurent Pinchart | 0d00f00 | 2013-03-10 16:55:19 +0100 | [diff] [blame] | 370 | return ret; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 371 | } |
| 372 | |
Laurent Pinchart | fe330ce | 2013-02-15 16:04:47 +0100 | [diff] [blame] | 373 | static const struct pinmux_ops sh_pfc_pinmux_ops = { |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 374 | .get_functions_count = sh_pfc_get_functions_count, |
| 375 | .get_function_name = sh_pfc_get_function_name, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 376 | .get_function_groups = sh_pfc_get_function_groups, |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 377 | .enable = sh_pfc_func_enable, |
| 378 | .disable = sh_pfc_func_disable, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 379 | .gpio_request_enable = sh_pfc_gpio_request_enable, |
| 380 | .gpio_disable_free = sh_pfc_gpio_disable_free, |
| 381 | .gpio_set_direction = sh_pfc_gpio_set_direction, |
| 382 | }; |
| 383 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 384 | /* Check whether the requested parameter is supported for a pin. */ |
| 385 | static bool sh_pfc_pinconf_validate(struct sh_pfc *pfc, unsigned int _pin, |
| 386 | enum pin_config_param param) |
| 387 | { |
| 388 | int idx = sh_pfc_get_pin_index(pfc, _pin); |
| 389 | const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; |
| 390 | |
| 391 | switch (param) { |
| 392 | case PIN_CONFIG_BIAS_DISABLE: |
| 393 | return true; |
| 394 | |
| 395 | case PIN_CONFIG_BIAS_PULL_UP: |
| 396 | return pin->configs & SH_PFC_PIN_CFG_PULL_UP; |
| 397 | |
| 398 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 399 | return pin->configs & SH_PFC_PIN_CFG_PULL_DOWN; |
| 400 | |
| 401 | default: |
| 402 | return false; |
| 403 | } |
| 404 | } |
| 405 | |
Laurent Pinchart | 934cb02 | 2013-02-14 22:35:09 +0100 | [diff] [blame] | 406 | static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 407 | unsigned long *config) |
| 408 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 409 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 410 | struct sh_pfc *pfc = pmx->pfc; |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 411 | enum pin_config_param param = pinconf_to_config_param(*config); |
| 412 | unsigned long flags; |
| 413 | unsigned int bias; |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 414 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 415 | if (!sh_pfc_pinconf_validate(pfc, _pin, param)) |
| 416 | return -ENOTSUPP; |
| 417 | |
| 418 | switch (param) { |
| 419 | case PIN_CONFIG_BIAS_DISABLE: |
| 420 | case PIN_CONFIG_BIAS_PULL_UP: |
| 421 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 422 | if (!pfc->info->ops || !pfc->info->ops->get_bias) |
| 423 | return -ENOTSUPP; |
| 424 | |
| 425 | spin_lock_irqsave(&pfc->lock, flags); |
| 426 | bias = pfc->info->ops->get_bias(pfc, _pin); |
| 427 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 428 | |
| 429 | if (bias != param) |
| 430 | return -EINVAL; |
| 431 | |
| 432 | *config = 0; |
| 433 | break; |
| 434 | |
| 435 | default: |
| 436 | return -ENOTSUPP; |
| 437 | } |
Paul Mundt | d93a891 | 2012-07-11 17:17:10 +0900 | [diff] [blame] | 438 | |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 439 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 440 | } |
| 441 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 442 | static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned _pin, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 443 | unsigned long config) |
| 444 | { |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 445 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 446 | struct sh_pfc *pfc = pmx->pfc; |
| 447 | enum pin_config_param param = pinconf_to_config_param(config); |
| 448 | unsigned long flags; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 449 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 450 | if (!sh_pfc_pinconf_validate(pfc, _pin, param)) |
| 451 | return -ENOTSUPP; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 452 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 453 | switch (param) { |
| 454 | case PIN_CONFIG_BIAS_PULL_UP: |
| 455 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 456 | case PIN_CONFIG_BIAS_DISABLE: |
| 457 | if (!pfc->info->ops || !pfc->info->ops->set_bias) |
| 458 | return -ENOTSUPP; |
| 459 | |
| 460 | spin_lock_irqsave(&pfc->lock, flags); |
| 461 | pfc->info->ops->set_bias(pfc, _pin, param); |
| 462 | spin_unlock_irqrestore(&pfc->lock, flags); |
| 463 | |
| 464 | break; |
| 465 | |
| 466 | default: |
| 467 | return -ENOTSUPP; |
| 468 | } |
| 469 | |
| 470 | return 0; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 471 | } |
| 472 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 473 | static int sh_pfc_pinconf_group_set(struct pinctrl_dev *pctldev, unsigned group, |
| 474 | unsigned long config) |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 475 | { |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 476 | struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); |
| 477 | const unsigned int *pins; |
| 478 | unsigned int num_pins; |
| 479 | unsigned int i; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 480 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 481 | pins = pmx->pfc->info->groups[group].pins; |
| 482 | num_pins = pmx->pfc->info->groups[group].nr_pins; |
Paul Mundt | fdd85ec | 2012-07-20 16:39:09 +0900 | [diff] [blame] | 483 | |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 484 | for (i = 0; i < num_pins; ++i) |
| 485 | sh_pfc_pinconf_set(pctldev, pins[i], config); |
| 486 | |
| 487 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 488 | } |
| 489 | |
Laurent Pinchart | fe330ce | 2013-02-15 16:04:47 +0100 | [diff] [blame] | 490 | static const struct pinconf_ops sh_pfc_pinconf_ops = { |
Laurent Pinchart | c58d9c1 | 2013-03-10 16:44:02 +0100 | [diff] [blame] | 491 | .is_generic = true, |
| 492 | .pin_config_get = sh_pfc_pinconf_get, |
| 493 | .pin_config_set = sh_pfc_pinconf_set, |
| 494 | .pin_config_group_set = sh_pfc_pinconf_group_set, |
| 495 | .pin_config_config_dbg_show = pinconf_generic_dump_config, |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 496 | }; |
| 497 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 498 | /* PFC ranges -> pinctrl pin descs */ |
| 499 | static int sh_pfc_map_pins(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 500 | { |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 501 | const struct pinmux_range *ranges; |
| 502 | struct pinmux_range def_range; |
| 503 | unsigned int nr_ranges; |
| 504 | unsigned int nr_pins; |
| 505 | unsigned int i; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 506 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 507 | if (pfc->info->ranges == NULL) { |
| 508 | def_range.begin = 0; |
| 509 | def_range.end = pfc->info->nr_pins - 1; |
| 510 | ranges = &def_range; |
| 511 | nr_ranges = 1; |
| 512 | } else { |
| 513 | ranges = pfc->info->ranges; |
| 514 | nr_ranges = pfc->info->nr_ranges; |
| 515 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 516 | |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 517 | pmx->pins = devm_kzalloc(pfc->dev, |
| 518 | sizeof(*pmx->pins) * pfc->info->nr_pins, |
Laurent Pinchart | 1724acf | 2012-12-15 23:50:48 +0100 | [diff] [blame] | 519 | GFP_KERNEL); |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 520 | if (unlikely(!pmx->pins)) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 521 | return -ENOMEM; |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 522 | |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 523 | pmx->configs = devm_kzalloc(pfc->dev, |
| 524 | sizeof(*pmx->configs) * pfc->info->nr_pins, |
| 525 | GFP_KERNEL); |
| 526 | if (unlikely(!pmx->configs)) |
| 527 | return -ENOMEM; |
| 528 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 529 | for (i = 0, nr_pins = 0; i < nr_ranges; ++i) { |
| 530 | const struct pinmux_range *range = &ranges[i]; |
| 531 | unsigned int number; |
| 532 | |
| 533 | for (number = range->begin; number <= range->end; |
| 534 | number++, nr_pins++) { |
Laurent Pinchart | 1a0039d | 2013-03-08 17:43:54 +0100 | [diff] [blame] | 535 | struct sh_pfc_pin_config *cfg = &pmx->configs[nr_pins]; |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 536 | struct pinctrl_pin_desc *pin = &pmx->pins[nr_pins]; |
Laurent Pinchart | cd3c1be | 2013-02-16 18:47:05 +0100 | [diff] [blame] | 537 | const struct sh_pfc_pin *info = |
| 538 | &pfc->info->pins[nr_pins]; |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 539 | |
| 540 | pin->number = number; |
| 541 | pin->name = info->name; |
Laurent Pinchart | 9fddc4a | 2013-03-10 17:25:29 +0100 | [diff] [blame] | 542 | cfg->type = PINMUX_TYPE_NONE; |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 543 | } |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 544 | } |
| 545 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 546 | pfc->nr_pins = ranges[nr_ranges-1].end + 1; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 547 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 548 | return nr_ranges; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 549 | } |
| 550 | |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 551 | int sh_pfc_register_pinctrl(struct sh_pfc *pfc) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 552 | { |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 553 | struct sh_pfc_pinctrl *pmx; |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 554 | int nr_ranges; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 555 | |
Laurent Pinchart | 1724acf | 2012-12-15 23:50:48 +0100 | [diff] [blame] | 556 | pmx = devm_kzalloc(pfc->dev, sizeof(*pmx), GFP_KERNEL); |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 557 | if (unlikely(!pmx)) |
| 558 | return -ENOMEM; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 559 | |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 560 | pmx->pfc = pfc; |
| 561 | pfc->pinctrl = pmx; |
| 562 | |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 563 | nr_ranges = sh_pfc_map_pins(pfc, pmx); |
| 564 | if (unlikely(nr_ranges < 0)) |
| 565 | return nr_ranges; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 566 | |
Laurent Pinchart | dcc427e | 2013-02-16 16:38:30 +0100 | [diff] [blame] | 567 | pmx->pctl_desc.name = DRV_NAME; |
| 568 | pmx->pctl_desc.owner = THIS_MODULE; |
| 569 | pmx->pctl_desc.pctlops = &sh_pfc_pinctrl_ops; |
| 570 | pmx->pctl_desc.pmxops = &sh_pfc_pinmux_ops; |
| 571 | pmx->pctl_desc.confops = &sh_pfc_pinconf_ops; |
Laurent Pinchart | 3d8d9f1 | 2013-01-03 14:33:13 +0100 | [diff] [blame] | 572 | pmx->pctl_desc.pins = pmx->pins; |
Laurent Pinchart | 63d5738 | 2013-02-15 01:33:38 +0100 | [diff] [blame] | 573 | pmx->pctl_desc.npins = pfc->info->nr_pins; |
Laurent Pinchart | dcc427e | 2013-02-16 16:38:30 +0100 | [diff] [blame] | 574 | |
| 575 | pmx->pctl = pinctrl_register(&pmx->pctl_desc, pfc->dev, pmx); |
Wei Yongjun | fd9d05b | 2013-03-11 22:08:12 +0800 | [diff] [blame] | 576 | if (pmx->pctl == NULL) |
| 577 | return -EINVAL; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 578 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 579 | return 0; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 580 | } |
| 581 | |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 582 | int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc) |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 583 | { |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 584 | struct sh_pfc_pinctrl *pmx = pfc->pinctrl; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 585 | |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 586 | pinctrl_unregister(pmx->pctl); |
| 587 | |
Laurent Pinchart | c6193ea | 2012-12-15 23:50:47 +0100 | [diff] [blame] | 588 | pfc->pinctrl = NULL; |
Paul Mundt | ca5481c6 | 2012-07-10 12:08:14 +0900 | [diff] [blame] | 589 | return 0; |
| 590 | } |