Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Generic device tree based pinctrl driver for one register per pin |
| 3 | * type pinmux controllers |
| 4 | * |
| 5 | * Copyright (C) 2012 Texas Instruments, Inc. |
| 6 | * |
| 7 | * This file is licensed under the terms of the GNU General Public |
| 8 | * License version 2. This program is licensed "as is" without any |
| 9 | * warranty of any kind, whether express or implied. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/io.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/list.h> |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 18 | #include <linux/interrupt.h> |
| 19 | |
| 20 | #include <linux/irqchip/chained_irq.h> |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 21 | |
| 22 | #include <linux/of.h> |
| 23 | #include <linux/of_device.h> |
| 24 | #include <linux/of_address.h> |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 25 | #include <linux/of_irq.h> |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 26 | |
| 27 | #include <linux/pinctrl/pinctrl.h> |
| 28 | #include <linux/pinctrl/pinmux.h> |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 29 | #include <linux/pinctrl/pinconf-generic.h> |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 30 | |
| 31 | #include "core.h" |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 32 | #include "pinconf.h" |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 33 | |
| 34 | #define DRIVER_NAME "pinctrl-single" |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 35 | #define PCS_MUX_PINS_NAME "pinctrl-single,pins" |
| 36 | #define PCS_MUX_BITS_NAME "pinctrl-single,bits" |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 37 | #define PCS_REG_NAME_LEN ((sizeof(unsigned long) * 2) + 3) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 38 | #define PCS_OFF_DISABLED ~0U |
| 39 | |
| 40 | /** |
| 41 | * struct pcs_pingroup - pingroups for a function |
| 42 | * @np: pingroup device node pointer |
| 43 | * @name: pingroup name |
| 44 | * @gpins: array of the pins in the group |
| 45 | * @ngpins: number of pins in the group |
| 46 | * @node: list node |
| 47 | */ |
| 48 | struct pcs_pingroup { |
| 49 | struct device_node *np; |
| 50 | const char *name; |
| 51 | int *gpins; |
| 52 | int ngpins; |
| 53 | struct list_head node; |
| 54 | }; |
| 55 | |
| 56 | /** |
| 57 | * struct pcs_func_vals - mux function register offset and value pair |
| 58 | * @reg: register virtual address |
| 59 | * @val: register value |
| 60 | */ |
| 61 | struct pcs_func_vals { |
| 62 | void __iomem *reg; |
| 63 | unsigned val; |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 64 | unsigned mask; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /** |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 68 | * struct pcs_conf_vals - pinconf parameter, pinconf register offset |
| 69 | * and value, enable, disable, mask |
| 70 | * @param: config parameter |
| 71 | * @val: user input bits in the pinconf register |
| 72 | * @enable: enable bits in the pinconf register |
| 73 | * @disable: disable bits in the pinconf register |
| 74 | * @mask: mask bits in the register value |
| 75 | */ |
| 76 | struct pcs_conf_vals { |
| 77 | enum pin_config_param param; |
| 78 | unsigned val; |
| 79 | unsigned enable; |
| 80 | unsigned disable; |
| 81 | unsigned mask; |
| 82 | }; |
| 83 | |
| 84 | /** |
| 85 | * struct pcs_conf_type - pinconf property name, pinconf param pair |
| 86 | * @name: property name in DTS file |
| 87 | * @param: config parameter |
| 88 | */ |
| 89 | struct pcs_conf_type { |
| 90 | const char *name; |
| 91 | enum pin_config_param param; |
| 92 | }; |
| 93 | |
| 94 | /** |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 95 | * struct pcs_function - pinctrl function |
| 96 | * @name: pinctrl function name |
| 97 | * @vals: register and vals array |
| 98 | * @nvals: number of entries in vals array |
| 99 | * @pgnames: array of pingroup names the function uses |
| 100 | * @npgnames: number of pingroup names the function uses |
| 101 | * @node: list node |
| 102 | */ |
| 103 | struct pcs_function { |
| 104 | const char *name; |
| 105 | struct pcs_func_vals *vals; |
| 106 | unsigned nvals; |
| 107 | const char **pgnames; |
| 108 | int npgnames; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 109 | struct pcs_conf_vals *conf; |
| 110 | int nconfs; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 111 | struct list_head node; |
| 112 | }; |
| 113 | |
| 114 | /** |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 115 | * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function |
| 116 | * @offset: offset base of pins |
| 117 | * @npins: number pins with the same mux value of gpio function |
| 118 | * @gpiofunc: mux value of gpio function |
| 119 | * @node: list node |
| 120 | */ |
| 121 | struct pcs_gpiofunc_range { |
| 122 | unsigned offset; |
| 123 | unsigned npins; |
| 124 | unsigned gpiofunc; |
| 125 | struct list_head node; |
| 126 | }; |
| 127 | |
| 128 | /** |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 129 | * struct pcs_data - wrapper for data needed by pinctrl framework |
| 130 | * @pa: pindesc array |
| 131 | * @cur: index to current element |
| 132 | * |
| 133 | * REVISIT: We should be able to drop this eventually by adding |
| 134 | * support for registering pins individually in the pinctrl |
| 135 | * framework for those drivers that don't need a static array. |
| 136 | */ |
| 137 | struct pcs_data { |
| 138 | struct pinctrl_pin_desc *pa; |
| 139 | int cur; |
| 140 | }; |
| 141 | |
| 142 | /** |
| 143 | * struct pcs_name - register name for a pin |
| 144 | * @name: name of the pinctrl register |
| 145 | * |
| 146 | * REVISIT: We may want to make names optional in the pinctrl |
| 147 | * framework as some drivers may not care about pin names to |
| 148 | * avoid kernel bloat. The pin names can be deciphered by user |
| 149 | * space tools using debugfs based on the register address and |
| 150 | * SoC packaging information. |
| 151 | */ |
| 152 | struct pcs_name { |
| 153 | char name[PCS_REG_NAME_LEN]; |
| 154 | }; |
| 155 | |
| 156 | /** |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 157 | * struct pcs_soc_data - SoC specific settings |
| 158 | * @flags: initial SoC specific PCS_FEAT_xxx values |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 159 | * @irq: optional interrupt for the controller |
| 160 | * @irq_enable_mask: optional SoC specific interrupt enable mask |
| 161 | * @irq_status_mask: optional SoC specific interrupt status mask |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 162 | */ |
| 163 | struct pcs_soc_data { |
| 164 | unsigned flags; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 165 | int irq; |
| 166 | unsigned irq_enable_mask; |
| 167 | unsigned irq_status_mask; |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | /** |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 171 | * struct pcs_device - pinctrl device instance |
| 172 | * @res: resources |
| 173 | * @base: virtual address of the controller |
| 174 | * @size: size of the ioremapped area |
| 175 | * @dev: device entry |
| 176 | * @pctl: pin controller device |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 177 | * @flags: mask of PCS_FEAT_xxx values |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 178 | * @lock: spinlock for register access |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 179 | * @mutex: mutex protecting the lists |
| 180 | * @width: bits per mux register |
| 181 | * @fmask: function register mask |
| 182 | * @fshift: function register shift |
| 183 | * @foff: value to turn mux off |
| 184 | * @fmax: max number of functions in fmask |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 185 | * @bits_per_pin:number of bits per pin |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 186 | * @names: array of register names for pins |
| 187 | * @pins: physical pins on the SoC |
| 188 | * @pgtree: pingroup index radix tree |
| 189 | * @ftree: function index radix tree |
| 190 | * @pingroups: list of pingroups |
| 191 | * @functions: list of functions |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 192 | * @gpiofuncs: list of gpio functions |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 193 | * @irqs: list of interrupt registers |
| 194 | * @chip: chip container for this instance |
| 195 | * @domain: IRQ domain for this instance |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 196 | * @ngroups: number of pingroups |
| 197 | * @nfuncs: number of functions |
| 198 | * @desc: pin controller descriptor |
| 199 | * @read: register read function to use |
| 200 | * @write: register write function to use |
| 201 | */ |
| 202 | struct pcs_device { |
| 203 | struct resource *res; |
| 204 | void __iomem *base; |
| 205 | unsigned size; |
| 206 | struct device *dev; |
| 207 | struct pinctrl_dev *pctl; |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 208 | unsigned flags; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 209 | #define PCS_QUIRK_SHARED_IRQ (1 << 2) |
| 210 | #define PCS_FEAT_IRQ (1 << 1) |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 211 | #define PCS_FEAT_PINCONF (1 << 0) |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 212 | struct pcs_soc_data socdata; |
| 213 | raw_spinlock_t lock; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 214 | struct mutex mutex; |
| 215 | unsigned width; |
| 216 | unsigned fmask; |
| 217 | unsigned fshift; |
| 218 | unsigned foff; |
| 219 | unsigned fmax; |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 220 | bool bits_per_mux; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 221 | unsigned bits_per_pin; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 222 | struct pcs_name *names; |
| 223 | struct pcs_data pins; |
| 224 | struct radix_tree_root pgtree; |
| 225 | struct radix_tree_root ftree; |
| 226 | struct list_head pingroups; |
| 227 | struct list_head functions; |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 228 | struct list_head gpiofuncs; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 229 | struct list_head irqs; |
| 230 | struct irq_chip chip; |
| 231 | struct irq_domain *domain; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 232 | unsigned ngroups; |
| 233 | unsigned nfuncs; |
| 234 | struct pinctrl_desc desc; |
| 235 | unsigned (*read)(void __iomem *reg); |
| 236 | void (*write)(unsigned val, void __iomem *reg); |
| 237 | }; |
| 238 | |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 239 | #define PCS_QUIRK_HAS_SHARED_IRQ (pcs->flags & PCS_QUIRK_SHARED_IRQ) |
| 240 | #define PCS_HAS_IRQ (pcs->flags & PCS_FEAT_IRQ) |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 241 | #define PCS_HAS_PINCONF (pcs->flags & PCS_FEAT_PINCONF) |
| 242 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 243 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
| 244 | unsigned long *config); |
| 245 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 246 | unsigned long *configs, unsigned num_configs); |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 247 | |
| 248 | static enum pin_config_param pcs_bias[] = { |
| 249 | PIN_CONFIG_BIAS_PULL_DOWN, |
| 250 | PIN_CONFIG_BIAS_PULL_UP, |
| 251 | }; |
| 252 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 253 | /* |
| 254 | * REVISIT: Reads and writes could eventually use regmap or something |
| 255 | * generic. But at least on omaps, some mux registers are performance |
| 256 | * critical as they may need to be remuxed every time before and after |
| 257 | * idle. Adding tests for register access width for every read and |
| 258 | * write like regmap is doing is not desired, and caching the registers |
| 259 | * does not help in this case. |
| 260 | */ |
| 261 | |
| 262 | static unsigned __maybe_unused pcs_readb(void __iomem *reg) |
| 263 | { |
| 264 | return readb(reg); |
| 265 | } |
| 266 | |
| 267 | static unsigned __maybe_unused pcs_readw(void __iomem *reg) |
| 268 | { |
| 269 | return readw(reg); |
| 270 | } |
| 271 | |
| 272 | static unsigned __maybe_unused pcs_readl(void __iomem *reg) |
| 273 | { |
| 274 | return readl(reg); |
| 275 | } |
| 276 | |
| 277 | static void __maybe_unused pcs_writeb(unsigned val, void __iomem *reg) |
| 278 | { |
| 279 | writeb(val, reg); |
| 280 | } |
| 281 | |
| 282 | static void __maybe_unused pcs_writew(unsigned val, void __iomem *reg) |
| 283 | { |
| 284 | writew(val, reg); |
| 285 | } |
| 286 | |
| 287 | static void __maybe_unused pcs_writel(unsigned val, void __iomem *reg) |
| 288 | { |
| 289 | writel(val, reg); |
| 290 | } |
| 291 | |
| 292 | static int pcs_get_groups_count(struct pinctrl_dev *pctldev) |
| 293 | { |
| 294 | struct pcs_device *pcs; |
| 295 | |
| 296 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 297 | |
| 298 | return pcs->ngroups; |
| 299 | } |
| 300 | |
| 301 | static const char *pcs_get_group_name(struct pinctrl_dev *pctldev, |
| 302 | unsigned gselector) |
| 303 | { |
| 304 | struct pcs_device *pcs; |
| 305 | struct pcs_pingroup *group; |
| 306 | |
| 307 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 308 | group = radix_tree_lookup(&pcs->pgtree, gselector); |
| 309 | if (!group) { |
| 310 | dev_err(pcs->dev, "%s could not find pingroup%i\n", |
| 311 | __func__, gselector); |
| 312 | return NULL; |
| 313 | } |
| 314 | |
| 315 | return group->name; |
| 316 | } |
| 317 | |
| 318 | static int pcs_get_group_pins(struct pinctrl_dev *pctldev, |
| 319 | unsigned gselector, |
| 320 | const unsigned **pins, |
| 321 | unsigned *npins) |
| 322 | { |
| 323 | struct pcs_device *pcs; |
| 324 | struct pcs_pingroup *group; |
| 325 | |
| 326 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 327 | group = radix_tree_lookup(&pcs->pgtree, gselector); |
| 328 | if (!group) { |
| 329 | dev_err(pcs->dev, "%s could not find pingroup%i\n", |
| 330 | __func__, gselector); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | *pins = group->gpins; |
| 335 | *npins = group->ngpins; |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
| 340 | static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev, |
| 341 | struct seq_file *s, |
Haojian Zhuang | e7ed671 | 2012-11-07 23:19:42 +0800 | [diff] [blame] | 342 | unsigned pin) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 343 | { |
Matt Porter | 7d66ce7 | 2012-09-26 15:07:43 -0400 | [diff] [blame] | 344 | struct pcs_device *pcs; |
Haojian Zhuang | e7ed671 | 2012-11-07 23:19:42 +0800 | [diff] [blame] | 345 | unsigned val, mux_bytes; |
Matt Porter | 7d66ce7 | 2012-09-26 15:07:43 -0400 | [diff] [blame] | 346 | |
| 347 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 348 | |
Haojian Zhuang | e7ed671 | 2012-11-07 23:19:42 +0800 | [diff] [blame] | 349 | mux_bytes = pcs->width / BITS_PER_BYTE; |
| 350 | val = pcs->read(pcs->base + pin * mux_bytes); |
Matt Porter | 7d66ce7 | 2012-09-26 15:07:43 -0400 | [diff] [blame] | 351 | |
| 352 | seq_printf(s, "%08x %s " , val, DRIVER_NAME); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | static void pcs_dt_free_map(struct pinctrl_dev *pctldev, |
| 356 | struct pinctrl_map *map, unsigned num_maps) |
| 357 | { |
| 358 | struct pcs_device *pcs; |
| 359 | |
| 360 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 361 | devm_kfree(pcs->dev, map); |
| 362 | } |
| 363 | |
| 364 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 365 | struct device_node *np_config, |
| 366 | struct pinctrl_map **map, unsigned *num_maps); |
| 367 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 368 | static const struct pinctrl_ops pcs_pinctrl_ops = { |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 369 | .get_groups_count = pcs_get_groups_count, |
| 370 | .get_group_name = pcs_get_group_name, |
| 371 | .get_group_pins = pcs_get_group_pins, |
| 372 | .pin_dbg_show = pcs_pin_dbg_show, |
| 373 | .dt_node_to_map = pcs_dt_node_to_map, |
| 374 | .dt_free_map = pcs_dt_free_map, |
| 375 | }; |
| 376 | |
| 377 | static int pcs_get_functions_count(struct pinctrl_dev *pctldev) |
| 378 | { |
| 379 | struct pcs_device *pcs; |
| 380 | |
| 381 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 382 | |
| 383 | return pcs->nfuncs; |
| 384 | } |
| 385 | |
| 386 | static const char *pcs_get_function_name(struct pinctrl_dev *pctldev, |
| 387 | unsigned fselector) |
| 388 | { |
| 389 | struct pcs_device *pcs; |
| 390 | struct pcs_function *func; |
| 391 | |
| 392 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 393 | func = radix_tree_lookup(&pcs->ftree, fselector); |
| 394 | if (!func) { |
| 395 | dev_err(pcs->dev, "%s could not find function%i\n", |
| 396 | __func__, fselector); |
| 397 | return NULL; |
| 398 | } |
| 399 | |
| 400 | return func->name; |
| 401 | } |
| 402 | |
| 403 | static int pcs_get_function_groups(struct pinctrl_dev *pctldev, |
| 404 | unsigned fselector, |
| 405 | const char * const **groups, |
| 406 | unsigned * const ngroups) |
| 407 | { |
| 408 | struct pcs_device *pcs; |
| 409 | struct pcs_function *func; |
| 410 | |
| 411 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 412 | func = radix_tree_lookup(&pcs->ftree, fselector); |
| 413 | if (!func) { |
| 414 | dev_err(pcs->dev, "%s could not find function%i\n", |
| 415 | __func__, fselector); |
| 416 | return -EINVAL; |
| 417 | } |
| 418 | *groups = func->pgnames; |
| 419 | *ngroups = func->npgnames; |
| 420 | |
| 421 | return 0; |
| 422 | } |
| 423 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 424 | static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin, |
| 425 | struct pcs_function **func) |
| 426 | { |
| 427 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
| 428 | struct pin_desc *pdesc = pin_desc_get(pctldev, pin); |
| 429 | const struct pinctrl_setting_mux *setting; |
| 430 | unsigned fselector; |
| 431 | |
| 432 | /* If pin is not described in DTS & enabled, mux_setting is NULL. */ |
| 433 | setting = pdesc->mux_setting; |
| 434 | if (!setting) |
| 435 | return -ENOTSUPP; |
| 436 | fselector = setting->func; |
| 437 | *func = radix_tree_lookup(&pcs->ftree, fselector); |
| 438 | if (!(*func)) { |
| 439 | dev_err(pcs->dev, "%s could not find function%i\n", |
| 440 | __func__, fselector); |
| 441 | return -ENOTSUPP; |
| 442 | } |
| 443 | return 0; |
| 444 | } |
| 445 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 446 | static int pcs_enable(struct pinctrl_dev *pctldev, unsigned fselector, |
| 447 | unsigned group) |
| 448 | { |
| 449 | struct pcs_device *pcs; |
| 450 | struct pcs_function *func; |
| 451 | int i; |
| 452 | |
| 453 | pcs = pinctrl_dev_get_drvdata(pctldev); |
Haojian Zhuang | 477ac77 | 2013-02-17 19:42:54 +0800 | [diff] [blame] | 454 | /* If function mask is null, needn't enable it. */ |
| 455 | if (!pcs->fmask) |
| 456 | return 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 457 | func = radix_tree_lookup(&pcs->ftree, fselector); |
| 458 | if (!func) |
| 459 | return -EINVAL; |
| 460 | |
| 461 | dev_dbg(pcs->dev, "enabling %s function%i\n", |
| 462 | func->name, fselector); |
| 463 | |
| 464 | for (i = 0; i < func->nvals; i++) { |
| 465 | struct pcs_func_vals *vals; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 466 | unsigned long flags; |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 467 | unsigned val, mask; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 468 | |
| 469 | vals = &func->vals[i]; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 470 | raw_spin_lock_irqsave(&pcs->lock, flags); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 471 | val = pcs->read(vals->reg); |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 472 | |
| 473 | if (pcs->bits_per_mux) |
| 474 | mask = vals->mask; |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 475 | else |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 476 | mask = pcs->fmask; |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 477 | |
| 478 | val &= ~mask; |
| 479 | val |= (vals->val & mask); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 480 | pcs->write(val, vals->reg); |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 481 | raw_spin_unlock_irqrestore(&pcs->lock, flags); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | static void pcs_disable(struct pinctrl_dev *pctldev, unsigned fselector, |
| 488 | unsigned group) |
| 489 | { |
| 490 | struct pcs_device *pcs; |
| 491 | struct pcs_function *func; |
| 492 | int i; |
| 493 | |
| 494 | pcs = pinctrl_dev_get_drvdata(pctldev); |
Haojian Zhuang | 477ac77 | 2013-02-17 19:42:54 +0800 | [diff] [blame] | 495 | /* If function mask is null, needn't disable it. */ |
| 496 | if (!pcs->fmask) |
| 497 | return; |
| 498 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 499 | func = radix_tree_lookup(&pcs->ftree, fselector); |
| 500 | if (!func) { |
| 501 | dev_err(pcs->dev, "%s could not find function%i\n", |
| 502 | __func__, fselector); |
| 503 | return; |
| 504 | } |
| 505 | |
| 506 | /* |
| 507 | * Ignore disable if function-off is not specified. Some hardware |
| 508 | * does not have clearly defined disable function. For pin specific |
| 509 | * off modes, you can use alternate named states as described in |
| 510 | * pinctrl-bindings.txt. |
| 511 | */ |
| 512 | if (pcs->foff == PCS_OFF_DISABLED) { |
| 513 | dev_dbg(pcs->dev, "ignoring disable for %s function%i\n", |
| 514 | func->name, fselector); |
| 515 | return; |
| 516 | } |
| 517 | |
| 518 | dev_dbg(pcs->dev, "disabling function%i %s\n", |
| 519 | fselector, func->name); |
| 520 | |
| 521 | for (i = 0; i < func->nvals; i++) { |
| 522 | struct pcs_func_vals *vals; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 523 | unsigned long flags; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 524 | unsigned val; |
| 525 | |
| 526 | vals = &func->vals[i]; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 527 | raw_spin_lock_irqsave(&pcs->lock, flags); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 528 | val = pcs->read(vals->reg); |
| 529 | val &= ~pcs->fmask; |
| 530 | val |= pcs->foff << pcs->fshift; |
| 531 | pcs->write(val, vals->reg); |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 532 | raw_spin_unlock_irqrestore(&pcs->lock, flags); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 533 | } |
| 534 | } |
| 535 | |
| 536 | static int pcs_request_gpio(struct pinctrl_dev *pctldev, |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 537 | struct pinctrl_gpio_range *range, unsigned pin) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 538 | { |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 539 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
| 540 | struct pcs_gpiofunc_range *frange = NULL; |
| 541 | struct list_head *pos, *tmp; |
| 542 | int mux_bytes = 0; |
| 543 | unsigned data; |
| 544 | |
Haojian Zhuang | 477ac77 | 2013-02-17 19:42:54 +0800 | [diff] [blame] | 545 | /* If function mask is null, return directly. */ |
| 546 | if (!pcs->fmask) |
| 547 | return -ENOTSUPP; |
| 548 | |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 549 | list_for_each_safe(pos, tmp, &pcs->gpiofuncs) { |
| 550 | frange = list_entry(pos, struct pcs_gpiofunc_range, node); |
| 551 | if (pin >= frange->offset + frange->npins |
| 552 | || pin < frange->offset) |
| 553 | continue; |
| 554 | mux_bytes = pcs->width / BITS_PER_BYTE; |
| 555 | data = pcs->read(pcs->base + pin * mux_bytes) & ~pcs->fmask; |
| 556 | data |= frange->gpiofunc; |
| 557 | pcs->write(data, pcs->base + pin * mux_bytes); |
| 558 | break; |
| 559 | } |
| 560 | return 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 563 | static const struct pinmux_ops pcs_pinmux_ops = { |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 564 | .get_functions_count = pcs_get_functions_count, |
| 565 | .get_function_name = pcs_get_function_name, |
| 566 | .get_function_groups = pcs_get_function_groups, |
| 567 | .enable = pcs_enable, |
| 568 | .disable = pcs_disable, |
| 569 | .gpio_request_enable = pcs_request_gpio, |
| 570 | }; |
| 571 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 572 | /* Clear BIAS value */ |
| 573 | static void pcs_pinconf_clear_bias(struct pinctrl_dev *pctldev, unsigned pin) |
| 574 | { |
| 575 | unsigned long config; |
| 576 | int i; |
| 577 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { |
| 578 | config = pinconf_to_config_packed(pcs_bias[i], 0); |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 579 | pcs_pinconf_set(pctldev, pin, &config, 1); |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 580 | } |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Check whether PIN_CONFIG_BIAS_DISABLE is valid. |
| 585 | * It's depend on that PULL_DOWN & PULL_UP configs are all invalid. |
| 586 | */ |
| 587 | static bool pcs_pinconf_bias_disable(struct pinctrl_dev *pctldev, unsigned pin) |
| 588 | { |
| 589 | unsigned long config; |
| 590 | int i; |
| 591 | |
| 592 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { |
| 593 | config = pinconf_to_config_packed(pcs_bias[i], 0); |
| 594 | if (!pcs_pinconf_get(pctldev, pin, &config)) |
| 595 | goto out; |
| 596 | } |
| 597 | return true; |
| 598 | out: |
| 599 | return false; |
| 600 | } |
| 601 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 602 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, |
| 603 | unsigned pin, unsigned long *config) |
| 604 | { |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 605 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
| 606 | struct pcs_function *func; |
| 607 | enum pin_config_param param; |
| 608 | unsigned offset = 0, data = 0, i, j, ret; |
| 609 | |
| 610 | ret = pcs_get_function(pctldev, pin, &func); |
| 611 | if (ret) |
| 612 | return ret; |
| 613 | |
| 614 | for (i = 0; i < func->nconfs; i++) { |
| 615 | param = pinconf_to_config_param(*config); |
| 616 | if (param == PIN_CONFIG_BIAS_DISABLE) { |
| 617 | if (pcs_pinconf_bias_disable(pctldev, pin)) { |
| 618 | *config = 0; |
| 619 | return 0; |
| 620 | } else { |
| 621 | return -ENOTSUPP; |
| 622 | } |
| 623 | } else if (param != func->conf[i].param) { |
| 624 | continue; |
| 625 | } |
| 626 | |
| 627 | offset = pin * (pcs->width / BITS_PER_BYTE); |
| 628 | data = pcs->read(pcs->base + offset) & func->conf[i].mask; |
| 629 | switch (func->conf[i].param) { |
| 630 | /* 4 parameters */ |
| 631 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 632 | case PIN_CONFIG_BIAS_PULL_UP: |
| 633 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
| 634 | if ((data != func->conf[i].enable) || |
| 635 | (data == func->conf[i].disable)) |
| 636 | return -ENOTSUPP; |
| 637 | *config = 0; |
| 638 | break; |
| 639 | /* 2 parameters */ |
| 640 | case PIN_CONFIG_INPUT_SCHMITT: |
| 641 | for (j = 0; j < func->nconfs; j++) { |
| 642 | switch (func->conf[j].param) { |
| 643 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
| 644 | if (data != func->conf[j].enable) |
| 645 | return -ENOTSUPP; |
| 646 | break; |
| 647 | default: |
| 648 | break; |
| 649 | } |
| 650 | } |
| 651 | *config = data; |
| 652 | break; |
| 653 | case PIN_CONFIG_DRIVE_STRENGTH: |
| 654 | case PIN_CONFIG_SLEW_RATE: |
| 655 | default: |
| 656 | *config = data; |
| 657 | break; |
| 658 | } |
| 659 | return 0; |
| 660 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 661 | return -ENOTSUPP; |
| 662 | } |
| 663 | |
| 664 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 665 | unsigned pin, unsigned long *configs, |
| 666 | unsigned num_configs) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 667 | { |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 668 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
| 669 | struct pcs_function *func; |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 670 | unsigned offset = 0, shift = 0, i, data, ret; |
| 671 | u16 arg; |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 672 | int j; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 673 | |
| 674 | ret = pcs_get_function(pctldev, pin, &func); |
| 675 | if (ret) |
| 676 | return ret; |
| 677 | |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 678 | for (j = 0; j < num_configs; j++) { |
| 679 | for (i = 0; i < func->nconfs; i++) { |
| 680 | if (pinconf_to_config_param(configs[j]) |
| 681 | != func->conf[i].param) |
| 682 | continue; |
| 683 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 684 | offset = pin * (pcs->width / BITS_PER_BYTE); |
| 685 | data = pcs->read(pcs->base + offset); |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 686 | arg = pinconf_to_config_argument(configs[j]); |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 687 | switch (func->conf[i].param) { |
| 688 | /* 2 parameters */ |
| 689 | case PIN_CONFIG_INPUT_SCHMITT: |
| 690 | case PIN_CONFIG_DRIVE_STRENGTH: |
| 691 | case PIN_CONFIG_SLEW_RATE: |
| 692 | shift = ffs(func->conf[i].mask) - 1; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 693 | data &= ~func->conf[i].mask; |
| 694 | data |= (arg << shift) & func->conf[i].mask; |
| 695 | break; |
| 696 | /* 4 parameters */ |
| 697 | case PIN_CONFIG_BIAS_DISABLE: |
| 698 | pcs_pinconf_clear_bias(pctldev, pin); |
| 699 | break; |
| 700 | case PIN_CONFIG_BIAS_PULL_DOWN: |
| 701 | case PIN_CONFIG_BIAS_PULL_UP: |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 702 | if (arg) |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 703 | pcs_pinconf_clear_bias(pctldev, pin); |
| 704 | /* fall through */ |
| 705 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
| 706 | data &= ~func->conf[i].mask; |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 707 | if (arg) |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 708 | data |= func->conf[i].enable; |
| 709 | else |
| 710 | data |= func->conf[i].disable; |
| 711 | break; |
| 712 | default: |
| 713 | return -ENOTSUPP; |
| 714 | } |
| 715 | pcs->write(data, pcs->base + offset); |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 716 | |
| 717 | break; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 718 | } |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 719 | if (i >= func->nconfs) |
| 720 | return -ENOTSUPP; |
| 721 | } /* for each config */ |
| 722 | |
| 723 | return 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | static int pcs_pinconf_group_get(struct pinctrl_dev *pctldev, |
| 727 | unsigned group, unsigned long *config) |
| 728 | { |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 729 | const unsigned *pins; |
| 730 | unsigned npins, old = 0; |
| 731 | int i, ret; |
| 732 | |
| 733 | ret = pcs_get_group_pins(pctldev, group, &pins, &npins); |
| 734 | if (ret) |
| 735 | return ret; |
| 736 | for (i = 0; i < npins; i++) { |
| 737 | if (pcs_pinconf_get(pctldev, pins[i], config)) |
| 738 | return -ENOTSUPP; |
| 739 | /* configs do not match between two pins */ |
| 740 | if (i && (old != *config)) |
| 741 | return -ENOTSUPP; |
| 742 | old = *config; |
| 743 | } |
| 744 | return 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 745 | } |
| 746 | |
| 747 | static int pcs_pinconf_group_set(struct pinctrl_dev *pctldev, |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 748 | unsigned group, unsigned long *configs, |
| 749 | unsigned num_configs) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 750 | { |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 751 | const unsigned *pins; |
| 752 | unsigned npins; |
| 753 | int i, ret; |
| 754 | |
| 755 | ret = pcs_get_group_pins(pctldev, group, &pins, &npins); |
| 756 | if (ret) |
| 757 | return ret; |
| 758 | for (i = 0; i < npins; i++) { |
Sherman Yin | 03b054e | 2013-08-27 11:32:12 -0700 | [diff] [blame] | 759 | if (pcs_pinconf_set(pctldev, pins[i], configs, num_configs)) |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 760 | return -ENOTSUPP; |
| 761 | } |
| 762 | return 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | static void pcs_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 766 | struct seq_file *s, unsigned pin) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 767 | { |
| 768 | } |
| 769 | |
| 770 | static void pcs_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, |
| 771 | struct seq_file *s, unsigned selector) |
| 772 | { |
| 773 | } |
| 774 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 775 | static void pcs_pinconf_config_dbg_show(struct pinctrl_dev *pctldev, |
| 776 | struct seq_file *s, |
| 777 | unsigned long config) |
| 778 | { |
| 779 | pinconf_generic_dump_config(pctldev, s, config); |
| 780 | } |
| 781 | |
Laurent Pinchart | 022ab14 | 2013-02-16 10:25:07 +0100 | [diff] [blame] | 782 | static const struct pinconf_ops pcs_pinconf_ops = { |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 783 | .pin_config_get = pcs_pinconf_get, |
| 784 | .pin_config_set = pcs_pinconf_set, |
| 785 | .pin_config_group_get = pcs_pinconf_group_get, |
| 786 | .pin_config_group_set = pcs_pinconf_group_set, |
| 787 | .pin_config_dbg_show = pcs_pinconf_dbg_show, |
| 788 | .pin_config_group_dbg_show = pcs_pinconf_group_dbg_show, |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 789 | .pin_config_config_dbg_show = pcs_pinconf_config_dbg_show, |
Axel Lin | a7bbdd7 | 2013-03-04 13:47:39 +0800 | [diff] [blame] | 790 | .is_generic = true, |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 791 | }; |
| 792 | |
| 793 | /** |
| 794 | * pcs_add_pin() - add a pin to the static per controller pin array |
| 795 | * @pcs: pcs driver instance |
| 796 | * @offset: register offset from base |
| 797 | */ |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 798 | static int pcs_add_pin(struct pcs_device *pcs, unsigned offset, |
| 799 | unsigned pin_pos) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 800 | { |
| 801 | struct pinctrl_pin_desc *pin; |
| 802 | struct pcs_name *pn; |
| 803 | int i; |
| 804 | |
| 805 | i = pcs->pins.cur; |
| 806 | if (i >= pcs->desc.npins) { |
| 807 | dev_err(pcs->dev, "too many pins, max %i\n", |
| 808 | pcs->desc.npins); |
| 809 | return -ENOMEM; |
| 810 | } |
| 811 | |
| 812 | pin = &pcs->pins.pa[i]; |
| 813 | pn = &pcs->names[i]; |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 814 | sprintf(pn->name, "%lx.%d", |
| 815 | (unsigned long)pcs->res->start + offset, pin_pos); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 816 | pin->name = pn->name; |
| 817 | pin->number = i; |
| 818 | pcs->pins.cur++; |
| 819 | |
| 820 | return i; |
| 821 | } |
| 822 | |
| 823 | /** |
| 824 | * pcs_allocate_pin_table() - adds all the pins for the pinctrl driver |
| 825 | * @pcs: pcs driver instance |
| 826 | * |
| 827 | * In case of errors, resources are freed in pcs_free_resources. |
| 828 | * |
| 829 | * If your hardware needs holes in the address space, then just set |
| 830 | * up multiple driver instances. |
| 831 | */ |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 832 | static int pcs_allocate_pin_table(struct pcs_device *pcs) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 833 | { |
| 834 | int mux_bytes, nr_pins, i; |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 835 | int num_pins_in_register = 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 836 | |
| 837 | mux_bytes = pcs->width / BITS_PER_BYTE; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 838 | |
| 839 | if (pcs->bits_per_mux) { |
| 840 | pcs->bits_per_pin = fls(pcs->fmask); |
| 841 | nr_pins = (pcs->size * BITS_PER_BYTE) / pcs->bits_per_pin; |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 842 | num_pins_in_register = pcs->width / pcs->bits_per_pin; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 843 | } else { |
| 844 | nr_pins = pcs->size / mux_bytes; |
| 845 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 846 | |
| 847 | dev_dbg(pcs->dev, "allocating %i pins\n", nr_pins); |
| 848 | pcs->pins.pa = devm_kzalloc(pcs->dev, |
| 849 | sizeof(*pcs->pins.pa) * nr_pins, |
| 850 | GFP_KERNEL); |
| 851 | if (!pcs->pins.pa) |
| 852 | return -ENOMEM; |
| 853 | |
| 854 | pcs->names = devm_kzalloc(pcs->dev, |
| 855 | sizeof(struct pcs_name) * nr_pins, |
| 856 | GFP_KERNEL); |
| 857 | if (!pcs->names) |
| 858 | return -ENOMEM; |
| 859 | |
| 860 | pcs->desc.pins = pcs->pins.pa; |
| 861 | pcs->desc.npins = nr_pins; |
| 862 | |
| 863 | for (i = 0; i < pcs->desc.npins; i++) { |
| 864 | unsigned offset; |
| 865 | int res; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 866 | int byte_num; |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 867 | int pin_pos = 0; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 868 | |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 869 | if (pcs->bits_per_mux) { |
| 870 | byte_num = (pcs->bits_per_pin * i) / BITS_PER_BYTE; |
| 871 | offset = (byte_num / mux_bytes) * mux_bytes; |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 872 | pin_pos = i % num_pins_in_register; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 873 | } else { |
| 874 | offset = i * mux_bytes; |
| 875 | } |
Manjunathappa, Prakash | 6f924b0 | 2013-05-21 19:38:01 +0530 | [diff] [blame] | 876 | res = pcs_add_pin(pcs, offset, pin_pos); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 877 | if (res < 0) { |
| 878 | dev_err(pcs->dev, "error adding pins: %i\n", res); |
| 879 | return res; |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | /** |
| 887 | * pcs_add_function() - adds a new function to the function list |
| 888 | * @pcs: pcs driver instance |
| 889 | * @np: device node of the mux entry |
| 890 | * @name: name of the function |
| 891 | * @vals: array of mux register value pairs used by the function |
| 892 | * @nvals: number of mux register value pairs |
| 893 | * @pgnames: array of pingroup names for the function |
| 894 | * @npgnames: number of pingroup names |
| 895 | */ |
| 896 | static struct pcs_function *pcs_add_function(struct pcs_device *pcs, |
| 897 | struct device_node *np, |
| 898 | const char *name, |
| 899 | struct pcs_func_vals *vals, |
| 900 | unsigned nvals, |
| 901 | const char **pgnames, |
| 902 | unsigned npgnames) |
| 903 | { |
| 904 | struct pcs_function *function; |
| 905 | |
| 906 | function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL); |
| 907 | if (!function) |
| 908 | return NULL; |
| 909 | |
| 910 | function->name = name; |
| 911 | function->vals = vals; |
| 912 | function->nvals = nvals; |
| 913 | function->pgnames = pgnames; |
| 914 | function->npgnames = npgnames; |
| 915 | |
| 916 | mutex_lock(&pcs->mutex); |
| 917 | list_add_tail(&function->node, &pcs->functions); |
| 918 | radix_tree_insert(&pcs->ftree, pcs->nfuncs, function); |
| 919 | pcs->nfuncs++; |
| 920 | mutex_unlock(&pcs->mutex); |
| 921 | |
| 922 | return function; |
| 923 | } |
| 924 | |
| 925 | static void pcs_remove_function(struct pcs_device *pcs, |
| 926 | struct pcs_function *function) |
| 927 | { |
| 928 | int i; |
| 929 | |
| 930 | mutex_lock(&pcs->mutex); |
| 931 | for (i = 0; i < pcs->nfuncs; i++) { |
| 932 | struct pcs_function *found; |
| 933 | |
| 934 | found = radix_tree_lookup(&pcs->ftree, i); |
| 935 | if (found == function) |
| 936 | radix_tree_delete(&pcs->ftree, i); |
| 937 | } |
| 938 | list_del(&function->node); |
| 939 | mutex_unlock(&pcs->mutex); |
| 940 | } |
| 941 | |
| 942 | /** |
| 943 | * pcs_add_pingroup() - add a pingroup to the pingroup list |
| 944 | * @pcs: pcs driver instance |
| 945 | * @np: device node of the mux entry |
| 946 | * @name: name of the pingroup |
| 947 | * @gpins: array of the pins that belong to the group |
| 948 | * @ngpins: number of pins in the group |
| 949 | */ |
| 950 | static int pcs_add_pingroup(struct pcs_device *pcs, |
| 951 | struct device_node *np, |
| 952 | const char *name, |
| 953 | int *gpins, |
| 954 | int ngpins) |
| 955 | { |
| 956 | struct pcs_pingroup *pingroup; |
| 957 | |
| 958 | pingroup = devm_kzalloc(pcs->dev, sizeof(*pingroup), GFP_KERNEL); |
| 959 | if (!pingroup) |
| 960 | return -ENOMEM; |
| 961 | |
| 962 | pingroup->name = name; |
| 963 | pingroup->np = np; |
| 964 | pingroup->gpins = gpins; |
| 965 | pingroup->ngpins = ngpins; |
| 966 | |
| 967 | mutex_lock(&pcs->mutex); |
| 968 | list_add_tail(&pingroup->node, &pcs->pingroups); |
| 969 | radix_tree_insert(&pcs->pgtree, pcs->ngroups, pingroup); |
| 970 | pcs->ngroups++; |
| 971 | mutex_unlock(&pcs->mutex); |
| 972 | |
| 973 | return 0; |
| 974 | } |
| 975 | |
| 976 | /** |
| 977 | * pcs_get_pin_by_offset() - get a pin index based on the register offset |
| 978 | * @pcs: pcs driver instance |
| 979 | * @offset: register offset from the base |
| 980 | * |
| 981 | * Note that this is OK as long as the pins are in a static array. |
| 982 | */ |
| 983 | static int pcs_get_pin_by_offset(struct pcs_device *pcs, unsigned offset) |
| 984 | { |
| 985 | unsigned index; |
| 986 | |
| 987 | if (offset >= pcs->size) { |
| 988 | dev_err(pcs->dev, "mux offset out of range: 0x%x (0x%x)\n", |
| 989 | offset, pcs->size); |
| 990 | return -EINVAL; |
| 991 | } |
| 992 | |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 993 | if (pcs->bits_per_mux) |
| 994 | index = (offset * BITS_PER_BYTE) / pcs->bits_per_pin; |
| 995 | else |
| 996 | index = offset / (pcs->width / BITS_PER_BYTE); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 997 | |
| 998 | return index; |
| 999 | } |
| 1000 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1001 | /* |
| 1002 | * check whether data matches enable bits or disable bits |
| 1003 | * Return value: 1 for matching enable bits, 0 for matching disable bits, |
| 1004 | * and negative value for matching failure. |
| 1005 | */ |
| 1006 | static int pcs_config_match(unsigned data, unsigned enable, unsigned disable) |
| 1007 | { |
| 1008 | int ret = -EINVAL; |
| 1009 | |
| 1010 | if (data == enable) |
| 1011 | ret = 1; |
| 1012 | else if (data == disable) |
| 1013 | ret = 0; |
| 1014 | return ret; |
| 1015 | } |
| 1016 | |
| 1017 | static void add_config(struct pcs_conf_vals **conf, enum pin_config_param param, |
| 1018 | unsigned value, unsigned enable, unsigned disable, |
| 1019 | unsigned mask) |
| 1020 | { |
| 1021 | (*conf)->param = param; |
| 1022 | (*conf)->val = value; |
| 1023 | (*conf)->enable = enable; |
| 1024 | (*conf)->disable = disable; |
| 1025 | (*conf)->mask = mask; |
| 1026 | (*conf)++; |
| 1027 | } |
| 1028 | |
| 1029 | static void add_setting(unsigned long **setting, enum pin_config_param param, |
| 1030 | unsigned arg) |
| 1031 | { |
| 1032 | **setting = pinconf_to_config_packed(param, arg); |
| 1033 | (*setting)++; |
| 1034 | } |
| 1035 | |
| 1036 | /* add pinconf setting with 2 parameters */ |
| 1037 | static void pcs_add_conf2(struct pcs_device *pcs, struct device_node *np, |
| 1038 | const char *name, enum pin_config_param param, |
| 1039 | struct pcs_conf_vals **conf, unsigned long **settings) |
| 1040 | { |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 1041 | unsigned value[2], shift; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1042 | int ret; |
| 1043 | |
| 1044 | ret = of_property_read_u32_array(np, name, value, 2); |
| 1045 | if (ret) |
| 1046 | return; |
| 1047 | /* set value & mask */ |
| 1048 | value[0] &= value[1]; |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 1049 | shift = ffs(value[1]) - 1; |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1050 | /* skip enable & disable */ |
| 1051 | add_config(conf, param, value[0], 0, 0, value[1]); |
Haojian Zhuang | 7cba5b3 | 2013-03-13 16:01:26 +0800 | [diff] [blame] | 1052 | add_setting(settings, param, value[0] >> shift); |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1053 | } |
| 1054 | |
| 1055 | /* add pinconf setting with 4 parameters */ |
| 1056 | static void pcs_add_conf4(struct pcs_device *pcs, struct device_node *np, |
| 1057 | const char *name, enum pin_config_param param, |
| 1058 | struct pcs_conf_vals **conf, unsigned long **settings) |
| 1059 | { |
| 1060 | unsigned value[4]; |
| 1061 | int ret; |
| 1062 | |
| 1063 | /* value to set, enable, disable, mask */ |
| 1064 | ret = of_property_read_u32_array(np, name, value, 4); |
| 1065 | if (ret) |
| 1066 | return; |
| 1067 | if (!value[3]) { |
| 1068 | dev_err(pcs->dev, "mask field of the property can't be 0\n"); |
| 1069 | return; |
| 1070 | } |
| 1071 | value[0] &= value[3]; |
| 1072 | value[1] &= value[3]; |
| 1073 | value[2] &= value[3]; |
| 1074 | ret = pcs_config_match(value[0], value[1], value[2]); |
| 1075 | if (ret < 0) |
| 1076 | dev_dbg(pcs->dev, "failed to match enable or disable bits\n"); |
| 1077 | add_config(conf, param, value[0], value[1], value[2], value[3]); |
| 1078 | add_setting(settings, param, ret); |
| 1079 | } |
| 1080 | |
| 1081 | static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np, |
| 1082 | struct pcs_function *func, |
| 1083 | struct pinctrl_map **map) |
| 1084 | |
| 1085 | { |
| 1086 | struct pinctrl_map *m = *map; |
| 1087 | int i = 0, nconfs = 0; |
| 1088 | unsigned long *settings = NULL, *s = NULL; |
| 1089 | struct pcs_conf_vals *conf = NULL; |
| 1090 | struct pcs_conf_type prop2[] = { |
| 1091 | { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, }, |
| 1092 | { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, }, |
| 1093 | { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, }, |
| 1094 | }; |
| 1095 | struct pcs_conf_type prop4[] = { |
| 1096 | { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, }, |
| 1097 | { "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, }, |
| 1098 | { "pinctrl-single,input-schmitt-enable", |
| 1099 | PIN_CONFIG_INPUT_SCHMITT_ENABLE, }, |
| 1100 | }; |
| 1101 | |
| 1102 | /* If pinconf isn't supported, don't parse properties in below. */ |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1103 | if (!PCS_HAS_PINCONF) |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1104 | return 0; |
| 1105 | |
| 1106 | /* cacluate how much properties are supported in current node */ |
| 1107 | for (i = 0; i < ARRAY_SIZE(prop2); i++) { |
| 1108 | if (of_find_property(np, prop2[i].name, NULL)) |
| 1109 | nconfs++; |
| 1110 | } |
| 1111 | for (i = 0; i < ARRAY_SIZE(prop4); i++) { |
| 1112 | if (of_find_property(np, prop4[i].name, NULL)) |
| 1113 | nconfs++; |
| 1114 | } |
| 1115 | if (!nconfs) |
| 1116 | return 0; |
| 1117 | |
| 1118 | func->conf = devm_kzalloc(pcs->dev, |
| 1119 | sizeof(struct pcs_conf_vals) * nconfs, |
| 1120 | GFP_KERNEL); |
| 1121 | if (!func->conf) |
| 1122 | return -ENOMEM; |
| 1123 | func->nconfs = nconfs; |
| 1124 | conf = &(func->conf[0]); |
| 1125 | m++; |
| 1126 | settings = devm_kzalloc(pcs->dev, sizeof(unsigned long) * nconfs, |
| 1127 | GFP_KERNEL); |
| 1128 | if (!settings) |
| 1129 | return -ENOMEM; |
| 1130 | s = &settings[0]; |
| 1131 | |
| 1132 | for (i = 0; i < ARRAY_SIZE(prop2); i++) |
| 1133 | pcs_add_conf2(pcs, np, prop2[i].name, prop2[i].param, |
| 1134 | &conf, &s); |
| 1135 | for (i = 0; i < ARRAY_SIZE(prop4); i++) |
| 1136 | pcs_add_conf4(pcs, np, prop4[i].name, prop4[i].param, |
| 1137 | &conf, &s); |
| 1138 | m->type = PIN_MAP_TYPE_CONFIGS_GROUP; |
| 1139 | m->data.configs.group_or_pin = np->name; |
| 1140 | m->data.configs.configs = settings; |
| 1141 | m->data.configs.num_configs = nconfs; |
| 1142 | return 0; |
| 1143 | } |
| 1144 | |
| 1145 | static void pcs_free_pingroups(struct pcs_device *pcs); |
| 1146 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1147 | /** |
| 1148 | * smux_parse_one_pinctrl_entry() - parses a device tree mux entry |
| 1149 | * @pcs: pinctrl driver instance |
| 1150 | * @np: device node of the mux entry |
| 1151 | * @map: map entry |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1152 | * @num_maps: number of map |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1153 | * @pgnames: pingroup names |
| 1154 | * |
| 1155 | * Note that this binding currently supports only sets of one register + value. |
| 1156 | * |
| 1157 | * Also note that this driver tries to avoid understanding pin and function |
| 1158 | * names because of the extra bloat they would cause especially in the case of |
| 1159 | * a large number of pins. This driver just sets what is specified for the board |
| 1160 | * in the .dts file. Further user space debugging tools can be developed to |
| 1161 | * decipher the pin and function names using debugfs. |
| 1162 | * |
| 1163 | * If you are concerned about the boot time, set up the static pins in |
| 1164 | * the bootloader, and only set up selected pins as device tree entries. |
| 1165 | */ |
| 1166 | static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs, |
| 1167 | struct device_node *np, |
| 1168 | struct pinctrl_map **map, |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1169 | unsigned *num_maps, |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1170 | const char **pgnames) |
| 1171 | { |
| 1172 | struct pcs_func_vals *vals; |
| 1173 | const __be32 *mux; |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1174 | int size, rows, *pins, index = 0, found = 0, res = -ENOMEM; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1175 | struct pcs_function *function; |
| 1176 | |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1177 | mux = of_get_property(np, PCS_MUX_PINS_NAME, &size); |
| 1178 | if ((!mux) || (size < sizeof(*mux) * 2)) { |
| 1179 | dev_err(pcs->dev, "bad data for mux %s\n", |
| 1180 | np->name); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1181 | return -EINVAL; |
| 1182 | } |
| 1183 | |
| 1184 | size /= sizeof(*mux); /* Number of elements in array */ |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1185 | rows = size / 2; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1186 | |
| 1187 | vals = devm_kzalloc(pcs->dev, sizeof(*vals) * rows, GFP_KERNEL); |
| 1188 | if (!vals) |
| 1189 | return -ENOMEM; |
| 1190 | |
| 1191 | pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows, GFP_KERNEL); |
| 1192 | if (!pins) |
| 1193 | goto free_vals; |
| 1194 | |
| 1195 | while (index < size) { |
| 1196 | unsigned offset, val; |
| 1197 | int pin; |
| 1198 | |
| 1199 | offset = be32_to_cpup(mux + index++); |
| 1200 | val = be32_to_cpup(mux + index++); |
| 1201 | vals[found].reg = pcs->base + offset; |
| 1202 | vals[found].val = val; |
| 1203 | |
| 1204 | pin = pcs_get_pin_by_offset(pcs, offset); |
| 1205 | if (pin < 0) { |
| 1206 | dev_err(pcs->dev, |
| 1207 | "could not add functions for %s %ux\n", |
| 1208 | np->name, offset); |
| 1209 | break; |
| 1210 | } |
| 1211 | pins[found++] = pin; |
| 1212 | } |
| 1213 | |
| 1214 | pgnames[0] = np->name; |
| 1215 | function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1); |
| 1216 | if (!function) |
| 1217 | goto free_pins; |
| 1218 | |
| 1219 | res = pcs_add_pingroup(pcs, np, np->name, pins, found); |
| 1220 | if (res < 0) |
| 1221 | goto free_function; |
| 1222 | |
| 1223 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; |
| 1224 | (*map)->data.mux.group = np->name; |
| 1225 | (*map)->data.mux.function = np->name; |
| 1226 | |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1227 | if (PCS_HAS_PINCONF) { |
Wei Yongjun | 18442e6 | 2013-05-07 20:06:19 +0800 | [diff] [blame] | 1228 | res = pcs_parse_pinconf(pcs, np, function, map); |
| 1229 | if (res) |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1230 | goto free_pingroups; |
| 1231 | *num_maps = 2; |
| 1232 | } else { |
| 1233 | *num_maps = 1; |
| 1234 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1235 | return 0; |
| 1236 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1237 | free_pingroups: |
| 1238 | pcs_free_pingroups(pcs); |
| 1239 | *num_maps = 1; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1240 | free_function: |
| 1241 | pcs_remove_function(pcs, function); |
| 1242 | |
| 1243 | free_pins: |
| 1244 | devm_kfree(pcs->dev, pins); |
| 1245 | |
| 1246 | free_vals: |
| 1247 | devm_kfree(pcs->dev, vals); |
| 1248 | |
| 1249 | return res; |
| 1250 | } |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1251 | |
| 1252 | #define PARAMS_FOR_BITS_PER_MUX 3 |
| 1253 | |
| 1254 | static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs, |
| 1255 | struct device_node *np, |
| 1256 | struct pinctrl_map **map, |
| 1257 | unsigned *num_maps, |
| 1258 | const char **pgnames) |
| 1259 | { |
| 1260 | struct pcs_func_vals *vals; |
| 1261 | const __be32 *mux; |
| 1262 | int size, rows, *pins, index = 0, found = 0, res = -ENOMEM; |
| 1263 | int npins_in_row; |
| 1264 | struct pcs_function *function; |
| 1265 | |
| 1266 | mux = of_get_property(np, PCS_MUX_BITS_NAME, &size); |
| 1267 | |
| 1268 | if (!mux) { |
| 1269 | dev_err(pcs->dev, "no valid property for %s\n", np->name); |
| 1270 | return -EINVAL; |
| 1271 | } |
| 1272 | |
| 1273 | if (size < (sizeof(*mux) * PARAMS_FOR_BITS_PER_MUX)) { |
| 1274 | dev_err(pcs->dev, "bad data for %s\n", np->name); |
| 1275 | return -EINVAL; |
| 1276 | } |
| 1277 | |
| 1278 | /* Number of elements in array */ |
| 1279 | size /= sizeof(*mux); |
| 1280 | |
| 1281 | rows = size / PARAMS_FOR_BITS_PER_MUX; |
| 1282 | npins_in_row = pcs->width / pcs->bits_per_pin; |
| 1283 | |
| 1284 | vals = devm_kzalloc(pcs->dev, sizeof(*vals) * rows * npins_in_row, |
| 1285 | GFP_KERNEL); |
| 1286 | if (!vals) |
| 1287 | return -ENOMEM; |
| 1288 | |
| 1289 | pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows * npins_in_row, |
| 1290 | GFP_KERNEL); |
| 1291 | if (!pins) |
| 1292 | goto free_vals; |
| 1293 | |
| 1294 | while (index < size) { |
| 1295 | unsigned offset, val; |
| 1296 | unsigned mask, bit_pos, val_pos, mask_pos, submask; |
| 1297 | unsigned pin_num_from_lsb; |
| 1298 | int pin; |
| 1299 | |
| 1300 | offset = be32_to_cpup(mux + index++); |
| 1301 | val = be32_to_cpup(mux + index++); |
| 1302 | mask = be32_to_cpup(mux + index++); |
| 1303 | |
| 1304 | /* Parse pins in each row from LSB */ |
| 1305 | while (mask) { |
| 1306 | bit_pos = ffs(mask); |
| 1307 | pin_num_from_lsb = bit_pos / pcs->bits_per_pin; |
| 1308 | mask_pos = ((pcs->fmask) << (bit_pos - 1)); |
| 1309 | val_pos = val & mask_pos; |
| 1310 | submask = mask & mask_pos; |
| 1311 | mask &= ~mask_pos; |
| 1312 | |
| 1313 | if (submask != mask_pos) { |
| 1314 | dev_warn(pcs->dev, |
| 1315 | "Invalid submask 0x%x for %s at 0x%x\n", |
| 1316 | submask, np->name, offset); |
| 1317 | continue; |
| 1318 | } |
| 1319 | |
| 1320 | vals[found].mask = submask; |
| 1321 | vals[found].reg = pcs->base + offset; |
| 1322 | vals[found].val = val_pos; |
| 1323 | |
| 1324 | pin = pcs_get_pin_by_offset(pcs, offset); |
| 1325 | if (pin < 0) { |
| 1326 | dev_err(pcs->dev, |
| 1327 | "could not add functions for %s %ux\n", |
| 1328 | np->name, offset); |
| 1329 | break; |
| 1330 | } |
| 1331 | pins[found++] = pin + pin_num_from_lsb; |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | pgnames[0] = np->name; |
| 1336 | function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1); |
| 1337 | if (!function) |
| 1338 | goto free_pins; |
| 1339 | |
| 1340 | res = pcs_add_pingroup(pcs, np, np->name, pins, found); |
| 1341 | if (res < 0) |
| 1342 | goto free_function; |
| 1343 | |
| 1344 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; |
| 1345 | (*map)->data.mux.group = np->name; |
| 1346 | (*map)->data.mux.function = np->name; |
| 1347 | |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1348 | if (PCS_HAS_PINCONF) { |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1349 | dev_err(pcs->dev, "pinconf not supported\n"); |
| 1350 | goto free_pingroups; |
| 1351 | } |
| 1352 | |
| 1353 | *num_maps = 1; |
| 1354 | return 0; |
| 1355 | |
| 1356 | free_pingroups: |
| 1357 | pcs_free_pingroups(pcs); |
| 1358 | *num_maps = 1; |
| 1359 | free_function: |
| 1360 | pcs_remove_function(pcs, function); |
| 1361 | |
| 1362 | free_pins: |
| 1363 | devm_kfree(pcs->dev, pins); |
| 1364 | |
| 1365 | free_vals: |
| 1366 | devm_kfree(pcs->dev, vals); |
| 1367 | |
| 1368 | return res; |
| 1369 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1370 | /** |
| 1371 | * pcs_dt_node_to_map() - allocates and parses pinctrl maps |
| 1372 | * @pctldev: pinctrl instance |
| 1373 | * @np_config: device tree pinmux entry |
| 1374 | * @map: array of map entries |
| 1375 | * @num_maps: number of maps |
| 1376 | */ |
| 1377 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, |
| 1378 | struct device_node *np_config, |
| 1379 | struct pinctrl_map **map, unsigned *num_maps) |
| 1380 | { |
| 1381 | struct pcs_device *pcs; |
| 1382 | const char **pgnames; |
| 1383 | int ret; |
| 1384 | |
| 1385 | pcs = pinctrl_dev_get_drvdata(pctldev); |
| 1386 | |
Haojian Zhuang | 9dddb4d | 2013-02-17 19:42:55 +0800 | [diff] [blame] | 1387 | /* create 2 maps. One is for pinmux, and the other is for pinconf. */ |
| 1388 | *map = devm_kzalloc(pcs->dev, sizeof(**map) * 2, GFP_KERNEL); |
Sachin Kamat | 00e79d1 | 2012-11-20 16:34:39 +0530 | [diff] [blame] | 1389 | if (!*map) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1390 | return -ENOMEM; |
| 1391 | |
| 1392 | *num_maps = 0; |
| 1393 | |
| 1394 | pgnames = devm_kzalloc(pcs->dev, sizeof(*pgnames), GFP_KERNEL); |
| 1395 | if (!pgnames) { |
| 1396 | ret = -ENOMEM; |
| 1397 | goto free_map; |
| 1398 | } |
| 1399 | |
Manjunathappa, Prakash | 4e7e801 | 2013-05-21 19:38:00 +0530 | [diff] [blame] | 1400 | if (pcs->bits_per_mux) { |
| 1401 | ret = pcs_parse_bits_in_pinctrl_entry(pcs, np_config, map, |
| 1402 | num_maps, pgnames); |
| 1403 | if (ret < 0) { |
| 1404 | dev_err(pcs->dev, "no pins entries for %s\n", |
| 1405 | np_config->name); |
| 1406 | goto free_pgnames; |
| 1407 | } |
| 1408 | } else { |
| 1409 | ret = pcs_parse_one_pinctrl_entry(pcs, np_config, map, |
| 1410 | num_maps, pgnames); |
| 1411 | if (ret < 0) { |
| 1412 | dev_err(pcs->dev, "no pins entries for %s\n", |
| 1413 | np_config->name); |
| 1414 | goto free_pgnames; |
| 1415 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1416 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1417 | |
| 1418 | return 0; |
| 1419 | |
| 1420 | free_pgnames: |
| 1421 | devm_kfree(pcs->dev, pgnames); |
| 1422 | free_map: |
| 1423 | devm_kfree(pcs->dev, *map); |
| 1424 | |
| 1425 | return ret; |
| 1426 | } |
| 1427 | |
| 1428 | /** |
| 1429 | * pcs_free_funcs() - free memory used by functions |
| 1430 | * @pcs: pcs driver instance |
| 1431 | */ |
| 1432 | static void pcs_free_funcs(struct pcs_device *pcs) |
| 1433 | { |
| 1434 | struct list_head *pos, *tmp; |
| 1435 | int i; |
| 1436 | |
| 1437 | mutex_lock(&pcs->mutex); |
| 1438 | for (i = 0; i < pcs->nfuncs; i++) { |
| 1439 | struct pcs_function *func; |
| 1440 | |
| 1441 | func = radix_tree_lookup(&pcs->ftree, i); |
| 1442 | if (!func) |
| 1443 | continue; |
| 1444 | radix_tree_delete(&pcs->ftree, i); |
| 1445 | } |
| 1446 | list_for_each_safe(pos, tmp, &pcs->functions) { |
| 1447 | struct pcs_function *function; |
| 1448 | |
| 1449 | function = list_entry(pos, struct pcs_function, node); |
| 1450 | list_del(&function->node); |
| 1451 | } |
| 1452 | mutex_unlock(&pcs->mutex); |
| 1453 | } |
| 1454 | |
| 1455 | /** |
| 1456 | * pcs_free_pingroups() - free memory used by pingroups |
| 1457 | * @pcs: pcs driver instance |
| 1458 | */ |
| 1459 | static void pcs_free_pingroups(struct pcs_device *pcs) |
| 1460 | { |
| 1461 | struct list_head *pos, *tmp; |
| 1462 | int i; |
| 1463 | |
| 1464 | mutex_lock(&pcs->mutex); |
| 1465 | for (i = 0; i < pcs->ngroups; i++) { |
| 1466 | struct pcs_pingroup *pingroup; |
| 1467 | |
| 1468 | pingroup = radix_tree_lookup(&pcs->pgtree, i); |
| 1469 | if (!pingroup) |
| 1470 | continue; |
| 1471 | radix_tree_delete(&pcs->pgtree, i); |
| 1472 | } |
| 1473 | list_for_each_safe(pos, tmp, &pcs->pingroups) { |
| 1474 | struct pcs_pingroup *pingroup; |
| 1475 | |
| 1476 | pingroup = list_entry(pos, struct pcs_pingroup, node); |
| 1477 | list_del(&pingroup->node); |
| 1478 | } |
| 1479 | mutex_unlock(&pcs->mutex); |
| 1480 | } |
| 1481 | |
| 1482 | /** |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1483 | * pcs_irq_free() - free interrupt |
| 1484 | * @pcs: pcs driver instance |
| 1485 | */ |
| 1486 | static void pcs_irq_free(struct pcs_device *pcs) |
| 1487 | { |
| 1488 | struct pcs_soc_data *pcs_soc = &pcs->socdata; |
| 1489 | |
| 1490 | if (pcs_soc->irq < 0) |
| 1491 | return; |
| 1492 | |
| 1493 | if (pcs->domain) |
| 1494 | irq_domain_remove(pcs->domain); |
| 1495 | |
| 1496 | if (PCS_QUIRK_HAS_SHARED_IRQ) |
| 1497 | free_irq(pcs_soc->irq, pcs_soc); |
| 1498 | else |
| 1499 | irq_set_chained_handler(pcs_soc->irq, NULL); |
| 1500 | } |
| 1501 | |
| 1502 | /** |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1503 | * pcs_free_resources() - free memory used by this driver |
| 1504 | * @pcs: pcs driver instance |
| 1505 | */ |
| 1506 | static void pcs_free_resources(struct pcs_device *pcs) |
| 1507 | { |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1508 | pcs_irq_free(pcs); |
| 1509 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1510 | if (pcs->pctl) |
| 1511 | pinctrl_unregister(pcs->pctl); |
| 1512 | |
| 1513 | pcs_free_funcs(pcs); |
| 1514 | pcs_free_pingroups(pcs); |
| 1515 | } |
| 1516 | |
| 1517 | #define PCS_GET_PROP_U32(name, reg, err) \ |
| 1518 | do { \ |
| 1519 | ret = of_property_read_u32(np, name, reg); \ |
| 1520 | if (ret) { \ |
| 1521 | dev_err(pcs->dev, err); \ |
| 1522 | return ret; \ |
| 1523 | } \ |
| 1524 | } while (0); |
| 1525 | |
| 1526 | static struct of_device_id pcs_of_match[]; |
| 1527 | |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 1528 | static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs) |
| 1529 | { |
| 1530 | const char *propname = "pinctrl-single,gpio-range"; |
| 1531 | const char *cellname = "#pinctrl-single,gpio-range-cells"; |
| 1532 | struct of_phandle_args gpiospec; |
| 1533 | struct pcs_gpiofunc_range *range; |
| 1534 | int ret, i; |
| 1535 | |
| 1536 | for (i = 0; ; i++) { |
| 1537 | ret = of_parse_phandle_with_args(node, propname, cellname, |
| 1538 | i, &gpiospec); |
| 1539 | /* Do not treat it as error. Only treat it as end condition. */ |
| 1540 | if (ret) { |
| 1541 | ret = 0; |
| 1542 | break; |
| 1543 | } |
| 1544 | range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL); |
| 1545 | if (!range) { |
| 1546 | ret = -ENOMEM; |
| 1547 | break; |
| 1548 | } |
| 1549 | range->offset = gpiospec.args[0]; |
| 1550 | range->npins = gpiospec.args[1]; |
| 1551 | range->gpiofunc = gpiospec.args[2]; |
| 1552 | mutex_lock(&pcs->mutex); |
| 1553 | list_add_tail(&range->node, &pcs->gpiofuncs); |
| 1554 | mutex_unlock(&pcs->mutex); |
| 1555 | } |
| 1556 | return ret; |
| 1557 | } |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1558 | /** |
| 1559 | * @reg: virtual address of interrupt register |
| 1560 | * @hwirq: hardware irq number |
| 1561 | * @irq: virtual irq number |
| 1562 | * @node: list node |
| 1563 | */ |
| 1564 | struct pcs_interrupt { |
| 1565 | void __iomem *reg; |
| 1566 | irq_hw_number_t hwirq; |
| 1567 | unsigned int irq; |
| 1568 | struct list_head node; |
| 1569 | }; |
| 1570 | |
| 1571 | /** |
| 1572 | * pcs_irq_set() - enables or disables an interrupt |
| 1573 | * |
| 1574 | * Note that this currently assumes one interrupt per pinctrl |
| 1575 | * register that is typically used for wake-up events. |
| 1576 | */ |
| 1577 | static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc, |
| 1578 | int irq, const bool enable) |
| 1579 | { |
| 1580 | struct pcs_device *pcs; |
| 1581 | struct list_head *pos; |
| 1582 | unsigned mask; |
| 1583 | |
| 1584 | pcs = container_of(pcs_soc, struct pcs_device, socdata); |
| 1585 | list_for_each(pos, &pcs->irqs) { |
| 1586 | struct pcs_interrupt *pcswi; |
| 1587 | unsigned soc_mask; |
| 1588 | |
| 1589 | pcswi = list_entry(pos, struct pcs_interrupt, node); |
| 1590 | if (irq != pcswi->irq) |
| 1591 | continue; |
| 1592 | |
| 1593 | soc_mask = pcs_soc->irq_enable_mask; |
| 1594 | raw_spin_lock(&pcs->lock); |
| 1595 | mask = pcs->read(pcswi->reg); |
| 1596 | if (enable) |
| 1597 | mask |= soc_mask; |
| 1598 | else |
| 1599 | mask &= ~soc_mask; |
| 1600 | pcs->write(mask, pcswi->reg); |
| 1601 | raw_spin_unlock(&pcs->lock); |
| 1602 | } |
| 1603 | } |
| 1604 | |
| 1605 | /** |
| 1606 | * pcs_irq_mask() - mask pinctrl interrupt |
| 1607 | * @d: interrupt data |
| 1608 | */ |
| 1609 | static void pcs_irq_mask(struct irq_data *d) |
| 1610 | { |
| 1611 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); |
| 1612 | |
| 1613 | pcs_irq_set(pcs_soc, d->irq, false); |
| 1614 | } |
| 1615 | |
| 1616 | /** |
| 1617 | * pcs_irq_unmask() - unmask pinctrl interrupt |
| 1618 | * @d: interrupt data |
| 1619 | */ |
| 1620 | static void pcs_irq_unmask(struct irq_data *d) |
| 1621 | { |
| 1622 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); |
| 1623 | |
| 1624 | pcs_irq_set(pcs_soc, d->irq, true); |
| 1625 | } |
| 1626 | |
| 1627 | /** |
| 1628 | * pcs_irq_set_wake() - toggle the suspend and resume wake up |
| 1629 | * @d: interrupt data |
| 1630 | * @state: wake-up state |
| 1631 | * |
| 1632 | * Note that this should be called only for suspend and resume. |
| 1633 | * For runtime PM, the wake-up events should be enabled by default. |
| 1634 | */ |
| 1635 | static int pcs_irq_set_wake(struct irq_data *d, unsigned int state) |
| 1636 | { |
| 1637 | if (state) |
| 1638 | pcs_irq_unmask(d); |
| 1639 | else |
| 1640 | pcs_irq_mask(d); |
| 1641 | |
| 1642 | return 0; |
| 1643 | } |
| 1644 | |
| 1645 | /** |
| 1646 | * pcs_irq_handle() - common interrupt handler |
| 1647 | * @pcs_irq: interrupt data |
| 1648 | * |
| 1649 | * Note that this currently assumes we have one interrupt bit per |
| 1650 | * mux register. This interrupt is typically used for wake-up events. |
| 1651 | * For more complex interrupts different handlers can be specified. |
| 1652 | */ |
| 1653 | static int pcs_irq_handle(struct pcs_soc_data *pcs_soc) |
| 1654 | { |
| 1655 | struct pcs_device *pcs; |
| 1656 | struct list_head *pos; |
| 1657 | int count = 0; |
| 1658 | |
| 1659 | pcs = container_of(pcs_soc, struct pcs_device, socdata); |
| 1660 | list_for_each(pos, &pcs->irqs) { |
| 1661 | struct pcs_interrupt *pcswi; |
| 1662 | unsigned mask; |
| 1663 | |
| 1664 | pcswi = list_entry(pos, struct pcs_interrupt, node); |
| 1665 | raw_spin_lock(&pcs->lock); |
| 1666 | mask = pcs->read(pcswi->reg); |
| 1667 | raw_spin_unlock(&pcs->lock); |
| 1668 | if (mask & pcs_soc->irq_status_mask) { |
| 1669 | generic_handle_irq(irq_find_mapping(pcs->domain, |
| 1670 | pcswi->hwirq)); |
| 1671 | count++; |
| 1672 | } |
| 1673 | } |
| 1674 | |
| 1675 | return count; |
| 1676 | } |
| 1677 | |
| 1678 | /** |
| 1679 | * pcs_irq_handler() - handler for the shared interrupt case |
| 1680 | * @irq: interrupt |
| 1681 | * @d: data |
| 1682 | * |
| 1683 | * Use this for cases where multiple instances of |
| 1684 | * pinctrl-single share a single interrupt like on omaps. |
| 1685 | */ |
| 1686 | static irqreturn_t pcs_irq_handler(int irq, void *d) |
| 1687 | { |
| 1688 | struct pcs_soc_data *pcs_soc = d; |
| 1689 | |
| 1690 | return pcs_irq_handle(pcs_soc) ? IRQ_HANDLED : IRQ_NONE; |
| 1691 | } |
| 1692 | |
| 1693 | /** |
| 1694 | * pcs_irq_handle() - handler for the dedicated chained interrupt case |
| 1695 | * @irq: interrupt |
| 1696 | * @desc: interrupt descriptor |
| 1697 | * |
| 1698 | * Use this if you have a separate interrupt for each |
| 1699 | * pinctrl-single instance. |
| 1700 | */ |
| 1701 | static void pcs_irq_chain_handler(unsigned int irq, struct irq_desc *desc) |
| 1702 | { |
| 1703 | struct pcs_soc_data *pcs_soc = irq_desc_get_handler_data(desc); |
| 1704 | struct irq_chip *chip; |
| 1705 | int res; |
| 1706 | |
| 1707 | chip = irq_get_chip(irq); |
| 1708 | chained_irq_enter(chip, desc); |
| 1709 | res = pcs_irq_handle(pcs_soc); |
| 1710 | /* REVISIT: export and add handle_bad_irq(irq, desc)? */ |
| 1711 | chained_irq_exit(chip, desc); |
| 1712 | |
| 1713 | return; |
| 1714 | } |
| 1715 | |
| 1716 | static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq, |
| 1717 | irq_hw_number_t hwirq) |
| 1718 | { |
| 1719 | struct pcs_soc_data *pcs_soc = d->host_data; |
| 1720 | struct pcs_device *pcs; |
| 1721 | struct pcs_interrupt *pcswi; |
| 1722 | |
| 1723 | pcs = container_of(pcs_soc, struct pcs_device, socdata); |
| 1724 | pcswi = devm_kzalloc(pcs->dev, sizeof(*pcswi), GFP_KERNEL); |
| 1725 | if (!pcswi) |
| 1726 | return -ENOMEM; |
| 1727 | |
| 1728 | pcswi->reg = pcs->base + hwirq; |
| 1729 | pcswi->hwirq = hwirq; |
| 1730 | pcswi->irq = irq; |
| 1731 | |
| 1732 | mutex_lock(&pcs->mutex); |
| 1733 | list_add_tail(&pcswi->node, &pcs->irqs); |
| 1734 | mutex_unlock(&pcs->mutex); |
| 1735 | |
| 1736 | irq_set_chip_data(irq, pcs_soc); |
| 1737 | irq_set_chip_and_handler(irq, &pcs->chip, |
| 1738 | handle_level_irq); |
| 1739 | set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); |
| 1740 | |
| 1741 | return 0; |
| 1742 | } |
| 1743 | |
| 1744 | static struct irq_domain_ops pcs_irqdomain_ops = { |
| 1745 | .map = pcs_irqdomain_map, |
| 1746 | .xlate = irq_domain_xlate_onecell, |
| 1747 | }; |
| 1748 | |
| 1749 | /** |
| 1750 | * pcs_irq_init_chained_handler() - set up a chained interrupt handler |
| 1751 | * @pcs: pcs driver instance |
| 1752 | * @np: device node pointer |
| 1753 | */ |
| 1754 | static int pcs_irq_init_chained_handler(struct pcs_device *pcs, |
| 1755 | struct device_node *np) |
| 1756 | { |
| 1757 | struct pcs_soc_data *pcs_soc = &pcs->socdata; |
| 1758 | const char *name = "pinctrl"; |
| 1759 | int num_irqs; |
| 1760 | |
| 1761 | if (!pcs_soc->irq_enable_mask || |
| 1762 | !pcs_soc->irq_status_mask) { |
| 1763 | pcs_soc->irq = -1; |
| 1764 | return -EINVAL; |
| 1765 | } |
| 1766 | |
| 1767 | INIT_LIST_HEAD(&pcs->irqs); |
| 1768 | pcs->chip.name = name; |
| 1769 | pcs->chip.irq_ack = pcs_irq_mask; |
| 1770 | pcs->chip.irq_mask = pcs_irq_mask; |
| 1771 | pcs->chip.irq_unmask = pcs_irq_unmask; |
| 1772 | pcs->chip.irq_set_wake = pcs_irq_set_wake; |
| 1773 | |
| 1774 | if (PCS_QUIRK_HAS_SHARED_IRQ) { |
| 1775 | int res; |
| 1776 | |
| 1777 | res = request_irq(pcs_soc->irq, pcs_irq_handler, |
| 1778 | IRQF_SHARED | IRQF_NO_SUSPEND, |
| 1779 | name, pcs_soc); |
| 1780 | if (res) { |
| 1781 | pcs_soc->irq = -1; |
| 1782 | return res; |
| 1783 | } |
| 1784 | } else { |
| 1785 | irq_set_handler_data(pcs_soc->irq, pcs_soc); |
| 1786 | irq_set_chained_handler(pcs_soc->irq, |
| 1787 | pcs_irq_chain_handler); |
| 1788 | } |
| 1789 | |
| 1790 | /* |
| 1791 | * We can use the register offset as the hardirq |
| 1792 | * number as irq_domain_add_simple maps them lazily. |
| 1793 | * This way we can easily support more than one |
| 1794 | * interrupt per function if needed. |
| 1795 | */ |
| 1796 | num_irqs = pcs->size; |
| 1797 | |
| 1798 | pcs->domain = irq_domain_add_simple(np, num_irqs, 0, |
| 1799 | &pcs_irqdomain_ops, |
| 1800 | pcs_soc); |
| 1801 | if (!pcs->domain) { |
| 1802 | irq_set_chained_handler(pcs_soc->irq, NULL); |
| 1803 | return -EINVAL; |
| 1804 | } |
| 1805 | |
| 1806 | return 0; |
| 1807 | } |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 1808 | |
Jean-Francois Moine | 8cb440a | 2013-07-15 10:14:26 +0200 | [diff] [blame] | 1809 | #ifdef CONFIG_PM |
Hebbar Gururaja | 0f9bc4b | 2013-05-31 15:43:01 +0530 | [diff] [blame] | 1810 | static int pinctrl_single_suspend(struct platform_device *pdev, |
| 1811 | pm_message_t state) |
| 1812 | { |
| 1813 | struct pcs_device *pcs; |
| 1814 | |
| 1815 | pcs = platform_get_drvdata(pdev); |
| 1816 | if (!pcs) |
| 1817 | return -EINVAL; |
| 1818 | |
| 1819 | return pinctrl_force_sleep(pcs->pctl); |
| 1820 | } |
| 1821 | |
| 1822 | static int pinctrl_single_resume(struct platform_device *pdev) |
| 1823 | { |
| 1824 | struct pcs_device *pcs; |
| 1825 | |
| 1826 | pcs = platform_get_drvdata(pdev); |
| 1827 | if (!pcs) |
| 1828 | return -EINVAL; |
| 1829 | |
| 1830 | return pinctrl_force_default(pcs->pctl); |
| 1831 | } |
Jean-Francois Moine | 8cb440a | 2013-07-15 10:14:26 +0200 | [diff] [blame] | 1832 | #endif |
Hebbar Gururaja | 0f9bc4b | 2013-05-31 15:43:01 +0530 | [diff] [blame] | 1833 | |
Greg Kroah-Hartman | 150632b | 2012-12-21 13:10:23 -0800 | [diff] [blame] | 1834 | static int pcs_probe(struct platform_device *pdev) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1835 | { |
| 1836 | struct device_node *np = pdev->dev.of_node; |
| 1837 | const struct of_device_id *match; |
| 1838 | struct resource *res; |
| 1839 | struct pcs_device *pcs; |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1840 | const struct pcs_soc_data *soc; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1841 | int ret; |
| 1842 | |
| 1843 | match = of_match_device(pcs_of_match, &pdev->dev); |
| 1844 | if (!match) |
| 1845 | return -EINVAL; |
| 1846 | |
| 1847 | pcs = devm_kzalloc(&pdev->dev, sizeof(*pcs), GFP_KERNEL); |
| 1848 | if (!pcs) { |
| 1849 | dev_err(&pdev->dev, "could not allocate\n"); |
| 1850 | return -ENOMEM; |
| 1851 | } |
| 1852 | pcs->dev = &pdev->dev; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1853 | raw_spin_lock_init(&pcs->lock); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1854 | mutex_init(&pcs->mutex); |
| 1855 | INIT_LIST_HEAD(&pcs->pingroups); |
| 1856 | INIT_LIST_HEAD(&pcs->functions); |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 1857 | INIT_LIST_HEAD(&pcs->gpiofuncs); |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1858 | soc = match->data; |
| 1859 | pcs->flags = soc->flags; |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1860 | memcpy(&pcs->socdata, soc, sizeof(*soc)); |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1861 | |
| 1862 | PCS_GET_PROP_U32("pinctrl-single,register-width", &pcs->width, |
| 1863 | "register width not specified\n"); |
| 1864 | |
Haojian Zhuang | 477ac77 | 2013-02-17 19:42:54 +0800 | [diff] [blame] | 1865 | ret = of_property_read_u32(np, "pinctrl-single,function-mask", |
| 1866 | &pcs->fmask); |
| 1867 | if (!ret) { |
| 1868 | pcs->fshift = ffs(pcs->fmask) - 1; |
| 1869 | pcs->fmax = pcs->fmask >> pcs->fshift; |
| 1870 | } else { |
| 1871 | /* If mask property doesn't exist, function mux is invalid. */ |
| 1872 | pcs->fmask = 0; |
| 1873 | pcs->fshift = 0; |
| 1874 | pcs->fmax = 0; |
| 1875 | } |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1876 | |
| 1877 | ret = of_property_read_u32(np, "pinctrl-single,function-off", |
| 1878 | &pcs->foff); |
| 1879 | if (ret) |
| 1880 | pcs->foff = PCS_OFF_DISABLED; |
| 1881 | |
Peter Ujfalusi | 9e605cb | 2012-09-11 11:54:24 +0300 | [diff] [blame] | 1882 | pcs->bits_per_mux = of_property_read_bool(np, |
| 1883 | "pinctrl-single,bit-per-mux"); |
| 1884 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1885 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1886 | if (!res) { |
| 1887 | dev_err(pcs->dev, "could not get resource\n"); |
| 1888 | return -ENODEV; |
| 1889 | } |
| 1890 | |
| 1891 | pcs->res = devm_request_mem_region(pcs->dev, res->start, |
| 1892 | resource_size(res), DRIVER_NAME); |
| 1893 | if (!pcs->res) { |
| 1894 | dev_err(pcs->dev, "could not get mem_region\n"); |
| 1895 | return -EBUSY; |
| 1896 | } |
| 1897 | |
| 1898 | pcs->size = resource_size(pcs->res); |
| 1899 | pcs->base = devm_ioremap(pcs->dev, pcs->res->start, pcs->size); |
| 1900 | if (!pcs->base) { |
| 1901 | dev_err(pcs->dev, "could not ioremap\n"); |
| 1902 | return -ENODEV; |
| 1903 | } |
| 1904 | |
| 1905 | INIT_RADIX_TREE(&pcs->pgtree, GFP_KERNEL); |
| 1906 | INIT_RADIX_TREE(&pcs->ftree, GFP_KERNEL); |
| 1907 | platform_set_drvdata(pdev, pcs); |
| 1908 | |
| 1909 | switch (pcs->width) { |
| 1910 | case 8: |
| 1911 | pcs->read = pcs_readb; |
| 1912 | pcs->write = pcs_writeb; |
| 1913 | break; |
| 1914 | case 16: |
| 1915 | pcs->read = pcs_readw; |
| 1916 | pcs->write = pcs_writew; |
| 1917 | break; |
| 1918 | case 32: |
| 1919 | pcs->read = pcs_readl; |
| 1920 | pcs->write = pcs_writel; |
| 1921 | break; |
| 1922 | default: |
| 1923 | break; |
| 1924 | } |
| 1925 | |
| 1926 | pcs->desc.name = DRIVER_NAME; |
| 1927 | pcs->desc.pctlops = &pcs_pinctrl_ops; |
| 1928 | pcs->desc.pmxops = &pcs_pinmux_ops; |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1929 | if (PCS_HAS_PINCONF) |
Axel Lin | a7bbdd7 | 2013-03-04 13:47:39 +0800 | [diff] [blame] | 1930 | pcs->desc.confops = &pcs_pinconf_ops; |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1931 | pcs->desc.owner = THIS_MODULE; |
| 1932 | |
| 1933 | ret = pcs_allocate_pin_table(pcs); |
| 1934 | if (ret < 0) |
| 1935 | goto free; |
| 1936 | |
| 1937 | pcs->pctl = pinctrl_register(&pcs->desc, pcs->dev, pcs); |
| 1938 | if (!pcs->pctl) { |
| 1939 | dev_err(pcs->dev, "could not register single pinctrl driver\n"); |
| 1940 | ret = -EINVAL; |
| 1941 | goto free; |
| 1942 | } |
| 1943 | |
Haojian Zhuang | a1a277e | 2013-02-17 19:42:52 +0800 | [diff] [blame] | 1944 | ret = pcs_add_gpio_func(np, pcs); |
| 1945 | if (ret < 0) |
| 1946 | goto free; |
| 1947 | |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1948 | pcs->socdata.irq = irq_of_parse_and_map(np, 0); |
| 1949 | if (pcs->socdata.irq) |
| 1950 | pcs->flags |= PCS_FEAT_IRQ; |
| 1951 | |
| 1952 | if (PCS_HAS_IRQ) { |
| 1953 | ret = pcs_irq_init_chained_handler(pcs, np); |
| 1954 | if (ret < 0) |
| 1955 | dev_warn(pcs->dev, "initialized with no interrupts\n"); |
| 1956 | } |
| 1957 | |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1958 | dev_info(pcs->dev, "%i pins at pa %p size %u\n", |
| 1959 | pcs->desc.npins, pcs->base, pcs->size); |
| 1960 | |
| 1961 | return 0; |
| 1962 | |
| 1963 | free: |
| 1964 | pcs_free_resources(pcs); |
| 1965 | |
| 1966 | return ret; |
| 1967 | } |
| 1968 | |
Bill Pemberton | f90f54b | 2012-11-19 13:26:06 -0500 | [diff] [blame] | 1969 | static int pcs_remove(struct platform_device *pdev) |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 1970 | { |
| 1971 | struct pcs_device *pcs = platform_get_drvdata(pdev); |
| 1972 | |
| 1973 | if (!pcs) |
| 1974 | return 0; |
| 1975 | |
| 1976 | pcs_free_resources(pcs); |
| 1977 | |
| 1978 | return 0; |
| 1979 | } |
| 1980 | |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1981 | static const struct pcs_soc_data pinctrl_single_omap_wkup = { |
| 1982 | .flags = PCS_QUIRK_SHARED_IRQ, |
| 1983 | .irq_enable_mask = (1 << 14), /* OMAP_WAKEUP_EN */ |
| 1984 | .irq_status_mask = (1 << 15), /* OMAP_WAKEUP_EVENT */ |
| 1985 | }; |
| 1986 | |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1987 | static const struct pcs_soc_data pinctrl_single = { |
| 1988 | }; |
| 1989 | |
| 1990 | static const struct pcs_soc_data pinconf_single = { |
| 1991 | .flags = PCS_FEAT_PINCONF, |
| 1992 | }; |
| 1993 | |
Bill Pemberton | 99688ed | 2012-11-19 13:24:27 -0500 | [diff] [blame] | 1994 | static struct of_device_id pcs_of_match[] = { |
Tony Lindgren | 3e6cee1 | 2013-10-02 21:39:40 -0700 | [diff] [blame^] | 1995 | { .compatible = "ti,omap3-padconf", .data = &pinctrl_single_omap_wkup }, |
| 1996 | { .compatible = "ti,omap4-padconf", .data = &pinctrl_single_omap_wkup }, |
| 1997 | { .compatible = "ti,omap5-padconf", .data = &pinctrl_single_omap_wkup }, |
Tony Lindgren | 02e483f | 2013-10-02 21:39:39 -0700 | [diff] [blame] | 1998 | { .compatible = "pinctrl-single", .data = &pinctrl_single }, |
| 1999 | { .compatible = "pinconf-single", .data = &pinconf_single }, |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 2000 | { }, |
| 2001 | }; |
| 2002 | MODULE_DEVICE_TABLE(of, pcs_of_match); |
| 2003 | |
| 2004 | static struct platform_driver pcs_driver = { |
| 2005 | .probe = pcs_probe, |
Bill Pemberton | 2a36f08 | 2012-11-19 13:21:27 -0500 | [diff] [blame] | 2006 | .remove = pcs_remove, |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 2007 | .driver = { |
| 2008 | .owner = THIS_MODULE, |
| 2009 | .name = DRIVER_NAME, |
| 2010 | .of_match_table = pcs_of_match, |
| 2011 | }, |
Hebbar Gururaja | 0f9bc4b | 2013-05-31 15:43:01 +0530 | [diff] [blame] | 2012 | #ifdef CONFIG_PM |
| 2013 | .suspend = pinctrl_single_suspend, |
| 2014 | .resume = pinctrl_single_resume, |
| 2015 | #endif |
Tony Lindgren | 8b8b091 | 2012-07-10 02:05:46 -0700 | [diff] [blame] | 2016 | }; |
| 2017 | |
| 2018 | module_platform_driver(pcs_driver); |
| 2019 | |
| 2020 | MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); |
| 2021 | MODULE_DESCRIPTION("One-register-per-pin type device tree based pinctrl driver"); |
| 2022 | MODULE_LICENSE("GPL v2"); |