kernel/drivers/pinctrl/spear/pinctrl-spear310.c

   1 /*
   2  * Driver for the ST Microelectronics SPEAr310 pinmux
   3  *
   4  * Copyright (C) 2012 ST Microelectronics
   5  * Viresh Kumar <viresh.linux@gmail.com>
   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/err.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/of_device.h>
  16 #include <linux/platform_device.h>
  17 #include "pinctrl-spear3xx.h"
  18
  19 #define DRIVER_NAME "spear310-pinmux"
  20
  21 /* addresses */
  22 #define PMX_CONFIG_REG                  0x08
  23
  24 /* emi_cs_0_to_5_pins */
  25 static const unsigned emi_cs_0_to_5_pins[] = { 45, 46, 47, 48, 49, 50 };
  26 static struct spear_muxreg emi_cs_0_to_5_muxreg[] = {
  27         {
  28                 .reg = PMX_CONFIG_REG,
  29                 .mask = PMX_TIMER_0_1_MASK | PMX_TIMER_2_3_MASK,
  30                 .val = 0,
  31         },
  32 };
  33
  34 static struct spear_modemux emi_cs_0_to_5_modemux[] = {
  35         {
  36                 .muxregs = emi_cs_0_to_5_muxreg,
  37                 .nmuxregs = ARRAY_SIZE(emi_cs_0_to_5_muxreg),
  38         },
  39 };
  40
  41 static struct spear_pingroup emi_cs_0_to_5_pingroup = {
  42         .name = "emi_cs_0_to_5_grp",
  43         .pins = emi_cs_0_to_5_pins,
  44         .npins = ARRAY_SIZE(emi_cs_0_to_5_pins),
  45         .modemuxs = emi_cs_0_to_5_modemux,
  46         .nmodemuxs = ARRAY_SIZE(emi_cs_0_to_5_modemux),
  47 };
  48
  49 static const char *const emi_cs_0_to_5_grps[] = { "emi_cs_0_to_5_grp" };
  50 static struct spear_function emi_cs_0_to_5_function = {
  51         .name = "emi",
  52         .groups = emi_cs_0_to_5_grps,
  53         .ngroups = ARRAY_SIZE(emi_cs_0_to_5_grps),
  54 };
  55
  56 /* uart1_pins */
  57 static const unsigned uart1_pins[] = { 0, 1 };
  58 static struct spear_muxreg uart1_muxreg[] = {
  59         {
  60                 .reg = PMX_CONFIG_REG,
  61                 .mask = PMX_FIRDA_MASK,
  62                 .val = 0,
  63         },
  64 };
  65
  66 static struct spear_modemux uart1_modemux[] = {
  67         {
  68                 .muxregs = uart1_muxreg,
  69                 .nmuxregs = ARRAY_SIZE(uart1_muxreg),
  70         },
  71 };
  72
  73 static struct spear_pingroup uart1_pingroup = {
  74         .name = "uart1_grp",
  75         .pins = uart1_pins,
  76         .npins = ARRAY_SIZE(uart1_pins),
  77         .modemuxs = uart1_modemux,
  78         .nmodemuxs = ARRAY_SIZE(uart1_modemux),
  79 };
  80
  81 static const char *const uart1_grps[] = { "uart1_grp" };
  82 static struct spear_function uart1_function = {
  83         .name = "uart1",
  84         .groups = uart1_grps,
  85         .ngroups = ARRAY_SIZE(uart1_grps),
  86 };
  87
  88 /* uart2_pins */
  89 static const unsigned uart2_pins[] = { 43, 44 };
  90 static struct spear_muxreg uart2_muxreg[] = {
  91         {
  92                 .reg = PMX_CONFIG_REG,
  93                 .mask = PMX_TIMER_0_1_MASK,
  94                 .val = 0,
  95         },
  96 };
  97
  98 static struct spear_modemux uart2_modemux[] = {
  99         {
 100                 .muxregs = uart2_muxreg,
 101                 .nmuxregs = ARRAY_SIZE(uart2_muxreg),
 102         },
 103 };
 104
 105 static struct spear_pingroup uart2_pingroup = {
 106         .name = "uart2_grp",
 107         .pins = uart2_pins,
 108         .npins = ARRAY_SIZE(uart2_pins),
 109         .modemuxs = uart2_modemux,
 110         .nmodemuxs = ARRAY_SIZE(uart2_modemux),
 111 };
 112
 113 static const char *const uart2_grps[] = { "uart2_grp" };
 114 static struct spear_function uart2_function = {
 115         .name = "uart2",
 116         .groups = uart2_grps,
 117         .ngroups = ARRAY_SIZE(uart2_grps),
 118 };
 119
 120 /* uart3_pins */
 121 static const unsigned uart3_pins[] = { 37, 38 };
 122 static struct spear_muxreg uart3_muxreg[] = {
 123         {
 124                 .reg = PMX_CONFIG_REG,
 125                 .mask = PMX_UART0_MODEM_MASK,
 126                 .val = 0,
 127         },
 128 };
 129
 130 static struct spear_modemux uart3_modemux[] = {
 131         {
 132                 .muxregs = uart3_muxreg,
 133                 .nmuxregs = ARRAY_SIZE(uart3_muxreg),
 134         },
 135 };
 136
 137 static struct spear_pingroup uart3_pingroup = {
 138         .name = "uart3_grp",
 139         .pins = uart3_pins,
 140         .npins = ARRAY_SIZE(uart3_pins),
 141         .modemuxs = uart3_modemux,
 142         .nmodemuxs = ARRAY_SIZE(uart3_modemux),
 143 };
 144
 145 static const char *const uart3_grps[] = { "uart3_grp" };
 146 static struct spear_function uart3_function = {
 147         .name = "uart3",
 148         .groups = uart3_grps,
 149         .ngroups = ARRAY_SIZE(uart3_grps),
 150 };
 151
 152 /* uart4_pins */
 153 static const unsigned uart4_pins[] = { 39, 40 };
 154 static struct spear_muxreg uart4_muxreg[] = {
 155         {
 156                 .reg = PMX_CONFIG_REG,
 157                 .mask = PMX_UART0_MODEM_MASK,
 158                 .val = 0,
 159         },
 160 };
 161
 162 static struct spear_modemux uart4_modemux[] = {
 163         {
 164                 .muxregs = uart4_muxreg,
 165                 .nmuxregs = ARRAY_SIZE(uart4_muxreg),
 166         },
 167 };
 168
 169 static struct spear_pingroup uart4_pingroup = {
 170         .name = "uart4_grp",
 171         .pins = uart4_pins,
 172         .npins = ARRAY_SIZE(uart4_pins),
 173         .modemuxs = uart4_modemux,
 174         .nmodemuxs = ARRAY_SIZE(uart4_modemux),
 175 };
 176
 177 static const char *const uart4_grps[] = { "uart4_grp" };
 178 static struct spear_function uart4_function = {
 179         .name = "uart4",
 180         .groups = uart4_grps,
 181         .ngroups = ARRAY_SIZE(uart4_grps),
 182 };
 183
 184 /* uart5_pins */
 185 static const unsigned uart5_pins[] = { 41, 42 };
 186 static struct spear_muxreg uart5_muxreg[] = {
 187         {
 188                 .reg = PMX_CONFIG_REG,
 189                 .mask = PMX_UART0_MODEM_MASK,
 190                 .val = 0,
 191         },
 192 };
 193
 194 static struct spear_modemux uart5_modemux[] = {
 195         {
 196                 .muxregs = uart5_muxreg,
 197                 .nmuxregs = ARRAY_SIZE(uart5_muxreg),
 198         },
 199 };
 200
 201 static struct spear_pingroup uart5_pingroup = {
 202         .name = "uart5_grp",
 203         .pins = uart5_pins,
 204         .npins = ARRAY_SIZE(uart5_pins),
 205         .modemuxs = uart5_modemux,
 206         .nmodemuxs = ARRAY_SIZE(uart5_modemux),
 207 };
 208
 209 static const char *const uart5_grps[] = { "uart5_grp" };
 210 static struct spear_function uart5_function = {
 211         .name = "uart5",
 212         .groups = uart5_grps,
 213         .ngroups = ARRAY_SIZE(uart5_grps),
 214 };
 215
 216 /* fsmc_pins */
 217 static const unsigned fsmc_pins[] = { 34, 35, 36 };
 218 static struct spear_muxreg fsmc_muxreg[] = {
 219         {
 220                 .reg = PMX_CONFIG_REG,
 221                 .mask = PMX_SSP_CS_MASK,
 222                 .val = 0,
 223         },
 224 };
 225
 226 static struct spear_modemux fsmc_modemux[] = {
 227         {
 228                 .muxregs = fsmc_muxreg,
 229                 .nmuxregs = ARRAY_SIZE(fsmc_muxreg),
 230         },
 231 };
 232
 233 static struct spear_pingroup fsmc_pingroup = {
 234         .name = "fsmc_grp",
 235         .pins = fsmc_pins,
 236         .npins = ARRAY_SIZE(fsmc_pins),
 237         .modemuxs = fsmc_modemux,
 238         .nmodemuxs = ARRAY_SIZE(fsmc_modemux),
 239 };
 240
 241 static const char *const fsmc_grps[] = { "fsmc_grp" };
 242 static struct spear_function fsmc_function = {
 243         .name = "fsmc",
 244         .groups = fsmc_grps,
 245         .ngroups = ARRAY_SIZE(fsmc_grps),
 246 };
 247
 248 /* rs485_0_pins */
 249 static const unsigned rs485_0_pins[] = { 19, 20, 21, 22, 23 };
 250 static struct spear_muxreg rs485_0_muxreg[] = {
 251         {
 252                 .reg = PMX_CONFIG_REG,
 253                 .mask = PMX_MII_MASK,
 254                 .val = 0,
 255         },
 256 };
 257
 258 static struct spear_modemux rs485_0_modemux[] = {
 259         {
 260                 .muxregs = rs485_0_muxreg,
 261                 .nmuxregs = ARRAY_SIZE(rs485_0_muxreg),
 262         },
 263 };
 264
 265 static struct spear_pingroup rs485_0_pingroup = {
 266         .name = "rs485_0_grp",
 267         .pins = rs485_0_pins,
 268         .npins = ARRAY_SIZE(rs485_0_pins),
 269         .modemuxs = rs485_0_modemux,
 270         .nmodemuxs = ARRAY_SIZE(rs485_0_modemux),
 271 };
 272
 273 static const char *const rs485_0_grps[] = { "rs485_0" };
 274 static struct spear_function rs485_0_function = {
 275         .name = "rs485_0",
 276         .groups = rs485_0_grps,
 277         .ngroups = ARRAY_SIZE(rs485_0_grps),
 278 };
 279
 280 /* rs485_1_pins */
 281 static const unsigned rs485_1_pins[] = { 14, 15, 16, 17, 18 };
 282 static struct spear_muxreg rs485_1_muxreg[] = {
 283         {
 284                 .reg = PMX_CONFIG_REG,
 285                 .mask = PMX_MII_MASK,
 286                 .val = 0,
 287         },
 288 };
 289
 290 static struct spear_modemux rs485_1_modemux[] = {
 291         {
 292                 .muxregs = rs485_1_muxreg,
 293                 .nmuxregs = ARRAY_SIZE(rs485_1_muxreg),
 294         },
 295 };
 296
 297 static struct spear_pingroup rs485_1_pingroup = {
 298         .name = "rs485_1_grp",
 299         .pins = rs485_1_pins,
 300         .npins = ARRAY_SIZE(rs485_1_pins),
 301         .modemuxs = rs485_1_modemux,
 302         .nmodemuxs = ARRAY_SIZE(rs485_1_modemux),
 303 };
 304
 305 static const char *const rs485_1_grps[] = { "rs485_1" };
 306 static struct spear_function rs485_1_function = {
 307         .name = "rs485_1",
 308         .groups = rs485_1_grps,
 309         .ngroups = ARRAY_SIZE(rs485_1_grps),
 310 };
 311
 312 /* tdm_pins */
 313 static const unsigned tdm_pins[] = { 10, 11, 12, 13 };
 314 static struct spear_muxreg tdm_muxreg[] = {
 315         {
 316                 .reg = PMX_CONFIG_REG,
 317                 .mask = PMX_MII_MASK,
 318                 .val = 0,
 319         },
 320 };
 321
 322 static struct spear_modemux tdm_modemux[] = {
 323         {
 324                 .muxregs = tdm_muxreg,
 325                 .nmuxregs = ARRAY_SIZE(tdm_muxreg),
 326         },
 327 };
 328
 329 static struct spear_pingroup tdm_pingroup = {
 330         .name = "tdm_grp",
 331         .pins = tdm_pins,
 332         .npins = ARRAY_SIZE(tdm_pins),
 333         .modemuxs = tdm_modemux,
 334         .nmodemuxs = ARRAY_SIZE(tdm_modemux),
 335 };
 336
 337 static const char *const tdm_grps[] = { "tdm_grp" };
 338 static struct spear_function tdm_function = {
 339         .name = "tdm",
 340         .groups = tdm_grps,
 341         .ngroups = ARRAY_SIZE(tdm_grps),
 342 };
 343
 344 /* pingroups */
 345 static struct spear_pingroup *spear310_pingroups[] = {
 346         SPEAR3XX_COMMON_PINGROUPS,
 347         &emi_cs_0_to_5_pingroup,
 348         &uart1_pingroup,
 349         &uart2_pingroup,
 350         &uart3_pingroup,
 351         &uart4_pingroup,
 352         &uart5_pingroup,
 353         &fsmc_pingroup,
 354         &rs485_0_pingroup,
 355         &rs485_1_pingroup,
 356         &tdm_pingroup,
 357 };
 358
 359 /* functions */
 360 static struct spear_function *spear310_functions[] = {
 361         SPEAR3XX_COMMON_FUNCTIONS,
 362         &emi_cs_0_to_5_function,
 363         &uart1_function,
 364         &uart2_function,
 365         &uart3_function,
 366         &uart4_function,
 367         &uart5_function,
 368         &fsmc_function,
 369         &rs485_0_function,
 370         &rs485_1_function,
 371         &tdm_function,
 372 };
 373
 374 static const struct of_device_id spear310_pinctrl_of_match[] = {
 375         {
 376                 .compatible = "st,spear310-pinmux",
 377         },
 378         {},
 379 };
 380
 381 static int spear310_pinctrl_probe(struct platform_device *pdev)
 382 {
 383         int ret;
 384
 385         spear3xx_machdata.groups = spear310_pingroups;
 386         spear3xx_machdata.ngroups = ARRAY_SIZE(spear310_pingroups);
 387         spear3xx_machdata.functions = spear310_functions;
 388         spear3xx_machdata.nfunctions = ARRAY_SIZE(spear310_functions);
 389
 390         pmx_init_addr(&spear3xx_machdata, PMX_CONFIG_REG);
 391         pmx_init_gpio_pingroup_addr(spear3xx_machdata.gpio_pingroups,
 392                         spear3xx_machdata.ngpio_pingroups, PMX_CONFIG_REG);
 393
 394         spear3xx_machdata.modes_supported = false;
 395
 396         ret = spear_pinctrl_probe(pdev, &spear3xx_machdata);
 397         if (ret)
 398                 return ret;
 399
 400         return 0;
 401 }
 402
 403 static int spear310_pinctrl_remove(struct platform_device *pdev)
 404 {
 405         return spear_pinctrl_remove(pdev);
 406 }
 407
 408 static struct platform_driver spear310_pinctrl_driver = {
 409         .driver = {
 410                 .name = DRIVER_NAME,
 411                 .of_match_table = spear310_pinctrl_of_match,
 412         },
 413         .probe = spear310_pinctrl_probe,
 414         .remove = spear310_pinctrl_remove,
 415 };
 416
 417 static int __init spear310_pinctrl_init(void)
 418 {
 419         return platform_driver_register(&spear310_pinctrl_driver);
 420 }
 421 arch_initcall(spear310_pinctrl_init);
 422
 423 static void __exit spear310_pinctrl_exit(void)
 424 {
 425         platform_driver_unregister(&spear310_pinctrl_driver);
 426 }
 427 module_exit(spear310_pinctrl_exit);
 428
 429 MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
 430 MODULE_DESCRIPTION("ST Microelectronics SPEAr310 pinctrl driver");
 431 MODULE_LICENSE("GPL v2");
 432 MODULE_DEVICE_TABLE(of, spear310_pinctrl_of_match);