arch/arm/mach-omap1/mcbsp.c

   1 /*
   2  * linux/arch/arm/mach-omap1/mcbsp.c
   3  *
   4  * Copyright (C) 2008 Instituto Nokia de Tecnologia
   5  * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Multichannel mode not supported.
  12  */
  13 #include <linux/ioport.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/clk.h>
  17 #include <linux/err.h>
  18 #include <linux/io.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/slab.h>
  21
  22 #include <mach/irqs.h>
  23 #include <plat/dma.h>
  24 #include <plat/mux.h>
  25 #include <plat/cpu.h>
  26 #include <plat/mcbsp.h>
  27
  28 #define DPS_RSTCT2_PER_EN       (1 << 0)
  29 #define DSP_RSTCT2_WD_PER_EN    (1 << 1)
  30
  31 static int dsp_use;
  32 static struct clk *api_clk;
  33 static struct clk *dsp_clk;
  34
  35 static void omap1_mcbsp_request(unsigned int id)
  36 {
  37         /*
  38          * On 1510, 1610 and 1710, McBSP1 and McBSP3
  39          * are DSP public peripherals.
  40          */
  41         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
  42                 if (dsp_use++ == 0) {
  43                         api_clk = clk_get(NULL, "api_ck");
  44                         dsp_clk = clk_get(NULL, "dsp_ck");
  45                         if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
  46                                 clk_enable(api_clk);
  47                                 clk_enable(dsp_clk);
  48
  49                                 /*
  50                                  * DSP external peripheral reset
  51                                  * FIXME: This should be moved to dsp code
  52                                  */
  53                                 __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
  54                                                 DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
  55                         }
  56                 }
  57         }
  58 }
  59
  60 static void omap1_mcbsp_free(unsigned int id)
  61 {
  62         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
  63                 if (--dsp_use == 0) {
  64                         if (!IS_ERR(api_clk)) {
  65                                 clk_disable(api_clk);
  66                                 clk_put(api_clk);
  67                         }
  68                         if (!IS_ERR(dsp_clk)) {
  69                                 clk_disable(dsp_clk);
  70                                 clk_put(dsp_clk);
  71                         }
  72                 }
  73         }
  74 }
  75
  76 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
  77         .request        = omap1_mcbsp_request,
  78         .free           = omap1_mcbsp_free,
  79 };
  80
  81 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
  82 struct resource omap7xx_mcbsp_res[][6] = {
  83         {
  84                 {
  85                         .start = OMAP7XX_MCBSP1_BASE,
  86                         .end   = OMAP7XX_MCBSP1_BASE + SZ_256,
  87                         .flags = IORESOURCE_MEM,
  88                 },
  89                 {
  90                         .name  = "rx",
  91                         .start = INT_7XX_McBSP1RX,
  92                         .flags = IORESOURCE_IRQ,
  93                 },
  94                 {
  95                         .name  = "tx",
  96                         .start = INT_7XX_McBSP1TX,
  97                         .flags = IORESOURCE_IRQ,
  98                 },
  99                 {
 100                         .name  = "rx",
 101                         .start = OMAP_DMA_MCBSP1_RX,
 102                         .flags = IORESOURCE_DMA,
 103                 },
 104                 {
 105                         .name  = "tx",
 106                         .start = OMAP_DMA_MCBSP1_TX,
 107                         .flags = IORESOURCE_DMA,
 108                 },
 109         },
 110         {
 111                 {
 112                         .start = OMAP7XX_MCBSP2_BASE,
 113                         .end   = OMAP7XX_MCBSP2_BASE + SZ_256,
 114                         .flags = IORESOURCE_MEM,
 115                 },
 116                 {
 117                         .name  = "rx",
 118                         .start = INT_7XX_McBSP2RX,
 119                         .flags = IORESOURCE_IRQ,
 120                 },
 121                 {
 122                         .name  = "tx",
 123                         .start = INT_7XX_McBSP2TX,
 124                         .flags = IORESOURCE_IRQ,
 125                 },
 126                 {
 127                         .name  = "rx",
 128                         .start = OMAP_DMA_MCBSP3_RX,
 129                         .flags = IORESOURCE_DMA,
 130                 },
 131                 {
 132                         .name  = "tx",
 133                         .start = OMAP_DMA_MCBSP3_TX,
 134                         .flags = IORESOURCE_DMA,
 135                 },
 136         },
 137 };
 138
 139 #define omap7xx_mcbsp_res_0             omap7xx_mcbsp_res[0]
 140
 141 static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
 142         {
 143                 .ops            = &omap1_mcbsp_ops,
 144         },
 145         {
 146                 .ops            = &omap1_mcbsp_ops,
 147         },
 148 };
 149 #define OMAP7XX_MCBSP_RES_SZ            ARRAY_SIZE(omap7xx_mcbsp_res[1])
 150 #define OMAP7XX_MCBSP_COUNT             ARRAY_SIZE(omap7xx_mcbsp_res)
 151 #else
 152 #define omap7xx_mcbsp_res_0             NULL
 153 #define omap7xx_mcbsp_pdata             NULL
 154 #define OMAP7XX_MCBSP_RES_SZ            0
 155 #define OMAP7XX_MCBSP_COUNT             0
 156 #endif
 157
 158 #ifdef CONFIG_ARCH_OMAP15XX
 159 struct resource omap15xx_mcbsp_res[][6] = {
 160         {
 161                 {
 162                         .start = OMAP1510_MCBSP1_BASE,
 163                         .end   = OMAP1510_MCBSP1_BASE + SZ_256,
 164                         .flags = IORESOURCE_MEM,
 165                 },
 166                 {
 167                         .name  = "rx",
 168                         .start = INT_McBSP1RX,
 169                         .flags = IORESOURCE_IRQ,
 170                 },
 171                 {
 172                         .name  = "tx",
 173                         .start = INT_McBSP1TX,
 174                         .flags = IORESOURCE_IRQ,
 175                 },
 176                 {
 177                         .name  = "rx",
 178                         .start = OMAP_DMA_MCBSP1_RX,
 179                         .flags = IORESOURCE_DMA,
 180                 },
 181                 {
 182                         .name  = "tx",
 183                         .start = OMAP_DMA_MCBSP1_TX,
 184                         .flags = IORESOURCE_DMA,
 185                 },
 186         },
 187         {
 188                 {
 189                         .start = OMAP1510_MCBSP2_BASE,
 190                         .end   = OMAP1510_MCBSP2_BASE + SZ_256,
 191                         .flags = IORESOURCE_MEM,
 192                 },
 193                 {
 194                         .name  = "rx",
 195                         .start = INT_1510_SPI_RX,
 196                         .flags = IORESOURCE_IRQ,
 197                 },
 198                 {
 199                         .name  = "tx",
 200                         .start = INT_1510_SPI_TX,
 201                         .flags = IORESOURCE_IRQ,
 202                 },
 203                 {
 204                         .name  = "rx",
 205                         .start = OMAP_DMA_MCBSP2_RX,
 206                         .flags = IORESOURCE_DMA,
 207                 },
 208                 {
 209                         .name  = "tx",
 210                         .start = OMAP_DMA_MCBSP2_TX,
 211                         .flags = IORESOURCE_DMA,
 212                 },
 213         },
 214         {
 215                 {
 216                         .start = OMAP1510_MCBSP3_BASE,
 217                         .end   = OMAP1510_MCBSP3_BASE + SZ_256,
 218                         .flags = IORESOURCE_MEM,
 219                 },
 220                 {
 221                         .name  = "rx",
 222                         .start = INT_McBSP3RX,
 223                         .flags = IORESOURCE_IRQ,
 224                 },
 225                 {
 226                         .name  = "tx",
 227                         .start = INT_McBSP3TX,
 228                         .flags = IORESOURCE_IRQ,
 229                 },
 230                 {
 231                         .name  = "rx",
 232                         .start = OMAP_DMA_MCBSP3_RX,
 233                         .flags = IORESOURCE_DMA,
 234                 },
 235                 {
 236                         .name  = "tx",
 237                         .start = OMAP_DMA_MCBSP3_TX,
 238                         .flags = IORESOURCE_DMA,
 239                 },
 240         },
 241 };
 242
 243 #define omap15xx_mcbsp_res_0            omap15xx_mcbsp_res[0]
 244
 245 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 246         {
 247                 .ops            = &omap1_mcbsp_ops,
 248         },
 249         {
 250                 .ops            = &omap1_mcbsp_ops,
 251         },
 252         {
 253                 .ops            = &omap1_mcbsp_ops,
 254         },
 255 };
 256 #define OMAP15XX_MCBSP_RES_SZ           ARRAY_SIZE(omap15xx_mcbsp_res[1])
 257 #define OMAP15XX_MCBSP_COUNT            ARRAY_SIZE(omap15xx_mcbsp_res)
 258 #else
 259 #define omap15xx_mcbsp_res_0            NULL
 260 #define omap15xx_mcbsp_pdata            NULL
 261 #define OMAP15XX_MCBSP_RES_SZ           0
 262 #define OMAP15XX_MCBSP_COUNT            0
 263 #endif
 264
 265 #ifdef CONFIG_ARCH_OMAP16XX
 266 struct resource omap16xx_mcbsp_res[][6] = {
 267         {
 268                 {
 269                         .start = OMAP1610_MCBSP1_BASE,
 270                         .end   = OMAP1610_MCBSP1_BASE + SZ_256,
 271                         .flags = IORESOURCE_MEM,
 272                 },
 273                 {
 274                         .name  = "rx",
 275                         .start = INT_McBSP1RX,
 276                         .flags = IORESOURCE_IRQ,
 277                 },
 278                 {
 279                         .name  = "tx",
 280                         .start = INT_McBSP1TX,
 281                         .flags = IORESOURCE_IRQ,
 282                 },
 283                 {
 284                         .name  = "rx",
 285                         .start = OMAP_DMA_MCBSP1_RX,
 286                         .flags = IORESOURCE_DMA,
 287                 },
 288                 {
 289                         .name  = "tx",
 290                         .start = OMAP_DMA_MCBSP1_TX,
 291                         .flags = IORESOURCE_DMA,
 292                 },
 293         },
 294         {
 295                 {
 296                         .start = OMAP1610_MCBSP2_BASE,
 297                         .end   = OMAP1610_MCBSP2_BASE + SZ_256,
 298                         .flags = IORESOURCE_MEM,
 299                 },
 300                 {
 301                         .name  = "rx",
 302                         .start = INT_1610_McBSP2_RX,
 303                         .flags = IORESOURCE_IRQ,
 304                 },
 305                 {
 306                         .name  = "tx",
 307                         .start = INT_1610_McBSP2_TX,
 308                         .flags = IORESOURCE_IRQ,
 309                 },
 310                 {
 311                         .name  = "rx",
 312                         .start = OMAP_DMA_MCBSP2_RX,
 313                         .flags = IORESOURCE_DMA,
 314                 },
 315                 {
 316                         .name  = "tx",
 317                         .start = OMAP_DMA_MCBSP2_TX,
 318                         .flags = IORESOURCE_DMA,
 319                 },
 320         },
 321         {
 322                 {
 323                         .start = OMAP1610_MCBSP3_BASE,
 324                         .end   = OMAP1610_MCBSP3_BASE + SZ_256,
 325                         .flags = IORESOURCE_MEM,
 326                 },
 327                 {
 328                         .name  = "rx",
 329                         .start = INT_McBSP3RX,
 330                         .flags = IORESOURCE_IRQ,
 331                 },
 332                 {
 333                         .name  = "tx",
 334                         .start = INT_McBSP3TX,
 335                         .flags = IORESOURCE_IRQ,
 336                 },
 337                 {
 338                         .name  = "rx",
 339                         .start = OMAP_DMA_MCBSP3_RX,
 340                         .flags = IORESOURCE_DMA,
 341                 },
 342                 {
 343                         .name  = "tx",
 344                         .start = OMAP_DMA_MCBSP3_TX,
 345                         .flags = IORESOURCE_DMA,
 346                 },
 347         },
 348 };
 349
 350 #define omap16xx_mcbsp_res_0            omap16xx_mcbsp_res[0]
 351
 352 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 353         {
 354                 .ops            = &omap1_mcbsp_ops,
 355         },
 356         {
 357                 .ops            = &omap1_mcbsp_ops,
 358         },
 359         {
 360                 .ops            = &omap1_mcbsp_ops,
 361         },
 362 };
 363 #define OMAP16XX_MCBSP_RES_SZ           ARRAY_SIZE(omap16xx_mcbsp_res[1])
 364 #define OMAP16XX_MCBSP_COUNT            ARRAY_SIZE(omap16xx_mcbsp_res)
 365 #else
 366 #define omap16xx_mcbsp_res_0            NULL
 367 #define omap16xx_mcbsp_pdata            NULL
 368 #define OMAP16XX_MCBSP_RES_SZ           0
 369 #define OMAP16XX_MCBSP_COUNT            0
 370 #endif
 371
 372 static int __init omap1_mcbsp_init(void)
 373 {
 374         if (!cpu_class_is_omap1())
 375                 return -ENODEV;
 376
 377         if (cpu_is_omap7xx())
 378                 omap_mcbsp_count = OMAP7XX_MCBSP_COUNT;
 379         else if (cpu_is_omap15xx())
 380                 omap_mcbsp_count = OMAP15XX_MCBSP_COUNT;
 381         else if (cpu_is_omap16xx())
 382                 omap_mcbsp_count = OMAP16XX_MCBSP_COUNT;
 383
 384         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 385                                                                 GFP_KERNEL);
 386         if (!mcbsp_ptr)
 387                 return -ENOMEM;
 388
 389         if (cpu_is_omap7xx())
 390                 omap_mcbsp_register_board_cfg(omap7xx_mcbsp_res_0,
 391                                         OMAP7XX_MCBSP_RES_SZ,
 392                                         omap7xx_mcbsp_pdata,
 393                                         OMAP7XX_MCBSP_COUNT);
 394
 395         if (cpu_is_omap15xx())
 396                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_res_0,
 397                                         OMAP15XX_MCBSP_RES_SZ,
 398                                         omap15xx_mcbsp_pdata,
 399                                         OMAP15XX_MCBSP_COUNT);
 400
 401         if (cpu_is_omap16xx())
 402                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_res_0,
 403                                         OMAP16XX_MCBSP_RES_SZ,
 404                                         omap16xx_mcbsp_pdata,
 405                                         OMAP16XX_MCBSP_COUNT);
 406
 407         return omap_mcbsp_init();
 408 }
 409
 410 arch_initcall(omap1_mcbsp_init);