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 static struct platform_device **omap_mcbsp_devices;
  35
  36 static void omap1_mcbsp_request(unsigned int id)
  37 {
  38         /*
  39          * On 1510, 1610 and 1710, McBSP1 and McBSP3
  40          * are DSP public peripherals.
  41          */
  42         if (id == 0 || id == 2) {
  43                 if (dsp_use++ == 0) {
  44                         api_clk = clk_get(NULL, "api_ck");
  45                         dsp_clk = clk_get(NULL, "dsp_ck");
  46                         if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
  47                                 clk_enable(api_clk);
  48                                 clk_enable(dsp_clk);
  49
  50                                 /*
  51                                  * DSP external peripheral reset
  52                                  * FIXME: This should be moved to dsp code
  53                                  */
  54                                 __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
  55                                                 DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
  56                         }
  57                 }
  58         }
  59 }
  60
  61 static void omap1_mcbsp_free(unsigned int id)
  62 {
  63         if (id == 0 || id == 2) {
  64                 if (--dsp_use == 0) {
  65                         if (!IS_ERR(api_clk)) {
  66                                 clk_disable(api_clk);
  67                                 clk_put(api_clk);
  68                         }
  69                         if (!IS_ERR(dsp_clk)) {
  70                                 clk_disable(dsp_clk);
  71                                 clk_put(dsp_clk);
  72                         }
  73                 }
  74         }
  75 }
  76
  77 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
  78         .request        = omap1_mcbsp_request,
  79         .free           = omap1_mcbsp_free,
  80 };
  81
  82 #define OMAP7XX_MCBSP1_BASE     0xfffb1000
  83 #define OMAP7XX_MCBSP2_BASE     0xfffb1800
  84
  85 #define OMAP1510_MCBSP1_BASE    0xe1011800
  86 #define OMAP1510_MCBSP2_BASE    0xfffb1000
  87 #define OMAP1510_MCBSP3_BASE    0xe1017000
  88
  89 #define OMAP1610_MCBSP1_BASE    0xe1011800
  90 #define OMAP1610_MCBSP2_BASE    0xfffb1000
  91 #define OMAP1610_MCBSP3_BASE    0xe1017000
  92
  93 #if defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP850)
  94 struct resource omap7xx_mcbsp_res[][6] = {
  95         {
  96                 {
  97                         .start = OMAP7XX_MCBSP1_BASE,
  98                         .end   = OMAP7XX_MCBSP1_BASE + SZ_256,
  99                         .flags = IORESOURCE_MEM,
 100                 },
 101                 {
 102                         .name  = "rx",
 103                         .start = INT_7XX_McBSP1RX,
 104                         .flags = IORESOURCE_IRQ,
 105                 },
 106                 {
 107                         .name  = "tx",
 108                         .start = INT_7XX_McBSP1TX,
 109                         .flags = IORESOURCE_IRQ,
 110                 },
 111                 {
 112                         .name  = "rx",
 113                         .start = OMAP_DMA_MCBSP1_RX,
 114                         .flags = IORESOURCE_DMA,
 115                 },
 116                 {
 117                         .name  = "tx",
 118                         .start = OMAP_DMA_MCBSP1_TX,
 119                         .flags = IORESOURCE_DMA,
 120                 },
 121         },
 122         {
 123                 {
 124                         .start = OMAP7XX_MCBSP2_BASE,
 125                         .end   = OMAP7XX_MCBSP2_BASE + SZ_256,
 126                         .flags = IORESOURCE_MEM,
 127                 },
 128                 {
 129                         .name  = "rx",
 130                         .start = INT_7XX_McBSP2RX,
 131                         .flags = IORESOURCE_IRQ,
 132                 },
 133                 {
 134                         .name  = "tx",
 135                         .start = INT_7XX_McBSP2TX,
 136                         .flags = IORESOURCE_IRQ,
 137                 },
 138                 {
 139                         .name  = "rx",
 140                         .start = OMAP_DMA_MCBSP3_RX,
 141                         .flags = IORESOURCE_DMA,
 142                 },
 143                 {
 144                         .name  = "tx",
 145                         .start = OMAP_DMA_MCBSP3_TX,
 146                         .flags = IORESOURCE_DMA,
 147                 },
 148         },
 149 };
 150
 151 #define omap7xx_mcbsp_res_0             omap7xx_mcbsp_res[0]
 152
 153 static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
 154         {
 155                 .ops            = &omap1_mcbsp_ops,
 156         },
 157         {
 158                 .ops            = &omap1_mcbsp_ops,
 159         },
 160 };
 161 #define OMAP7XX_MCBSP_RES_SZ            ARRAY_SIZE(omap7xx_mcbsp_res[1])
 162 #define OMAP7XX_MCBSP_COUNT             ARRAY_SIZE(omap7xx_mcbsp_res)
 163 #else
 164 #define omap7xx_mcbsp_res_0             NULL
 165 #define omap7xx_mcbsp_pdata             NULL
 166 #define OMAP7XX_MCBSP_RES_SZ            0
 167 #define OMAP7XX_MCBSP_COUNT             0
 168 #endif
 169
 170 #ifdef CONFIG_ARCH_OMAP15XX
 171 struct resource omap15xx_mcbsp_res[][6] = {
 172         {
 173                 {
 174                         .start = OMAP1510_MCBSP1_BASE,
 175                         .end   = OMAP1510_MCBSP1_BASE + SZ_256,
 176                         .flags = IORESOURCE_MEM,
 177                 },
 178                 {
 179                         .name  = "rx",
 180                         .start = INT_McBSP1RX,
 181                         .flags = IORESOURCE_IRQ,
 182                 },
 183                 {
 184                         .name  = "tx",
 185                         .start = INT_McBSP1TX,
 186                         .flags = IORESOURCE_IRQ,
 187                 },
 188                 {
 189                         .name  = "rx",
 190                         .start = OMAP_DMA_MCBSP1_RX,
 191                         .flags = IORESOURCE_DMA,
 192                 },
 193                 {
 194                         .name  = "tx",
 195                         .start = OMAP_DMA_MCBSP1_TX,
 196                         .flags = IORESOURCE_DMA,
 197                 },
 198         },
 199         {
 200                 {
 201                         .start = OMAP1510_MCBSP2_BASE,
 202                         .end   = OMAP1510_MCBSP2_BASE + SZ_256,
 203                         .flags = IORESOURCE_MEM,
 204                 },
 205                 {
 206                         .name  = "rx",
 207                         .start = INT_1510_SPI_RX,
 208                         .flags = IORESOURCE_IRQ,
 209                 },
 210                 {
 211                         .name  = "tx",
 212                         .start = INT_1510_SPI_TX,
 213                         .flags = IORESOURCE_IRQ,
 214                 },
 215                 {
 216                         .name  = "rx",
 217                         .start = OMAP_DMA_MCBSP2_RX,
 218                         .flags = IORESOURCE_DMA,
 219                 },
 220                 {
 221                         .name  = "tx",
 222                         .start = OMAP_DMA_MCBSP2_TX,
 223                         .flags = IORESOURCE_DMA,
 224                 },
 225         },
 226         {
 227                 {
 228                         .start = OMAP1510_MCBSP3_BASE,
 229                         .end   = OMAP1510_MCBSP3_BASE + SZ_256,
 230                         .flags = IORESOURCE_MEM,
 231                 },
 232                 {
 233                         .name  = "rx",
 234                         .start = INT_McBSP3RX,
 235                         .flags = IORESOURCE_IRQ,
 236                 },
 237                 {
 238                         .name  = "tx",
 239                         .start = INT_McBSP3TX,
 240                         .flags = IORESOURCE_IRQ,
 241                 },
 242                 {
 243                         .name  = "rx",
 244                         .start = OMAP_DMA_MCBSP3_RX,
 245                         .flags = IORESOURCE_DMA,
 246                 },
 247                 {
 248                         .name  = "tx",
 249                         .start = OMAP_DMA_MCBSP3_TX,
 250                         .flags = IORESOURCE_DMA,
 251                 },
 252         },
 253 };
 254
 255 #define omap15xx_mcbsp_res_0            omap15xx_mcbsp_res[0]
 256
 257 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 258         {
 259                 .ops            = &omap1_mcbsp_ops,
 260         },
 261         {
 262                 .ops            = &omap1_mcbsp_ops,
 263         },
 264         {
 265                 .ops            = &omap1_mcbsp_ops,
 266         },
 267 };
 268 #define OMAP15XX_MCBSP_RES_SZ           ARRAY_SIZE(omap15xx_mcbsp_res[1])
 269 #define OMAP15XX_MCBSP_COUNT            ARRAY_SIZE(omap15xx_mcbsp_res)
 270 #else
 271 #define omap15xx_mcbsp_res_0            NULL
 272 #define omap15xx_mcbsp_pdata            NULL
 273 #define OMAP15XX_MCBSP_RES_SZ           0
 274 #define OMAP15XX_MCBSP_COUNT            0
 275 #endif
 276
 277 #ifdef CONFIG_ARCH_OMAP16XX
 278 struct resource omap16xx_mcbsp_res[][6] = {
 279         {
 280                 {
 281                         .start = OMAP1610_MCBSP1_BASE,
 282                         .end   = OMAP1610_MCBSP1_BASE + SZ_256,
 283                         .flags = IORESOURCE_MEM,
 284                 },
 285                 {
 286                         .name  = "rx",
 287                         .start = INT_McBSP1RX,
 288                         .flags = IORESOURCE_IRQ,
 289                 },
 290                 {
 291                         .name  = "tx",
 292                         .start = INT_McBSP1TX,
 293                         .flags = IORESOURCE_IRQ,
 294                 },
 295                 {
 296                         .name  = "rx",
 297                         .start = OMAP_DMA_MCBSP1_RX,
 298                         .flags = IORESOURCE_DMA,
 299                 },
 300                 {
 301                         .name  = "tx",
 302                         .start = OMAP_DMA_MCBSP1_TX,
 303                         .flags = IORESOURCE_DMA,
 304                 },
 305         },
 306         {
 307                 {
 308                         .start = OMAP1610_MCBSP2_BASE,
 309                         .end   = OMAP1610_MCBSP2_BASE + SZ_256,
 310                         .flags = IORESOURCE_MEM,
 311                 },
 312                 {
 313                         .name  = "rx",
 314                         .start = INT_1610_McBSP2_RX,
 315                         .flags = IORESOURCE_IRQ,
 316                 },
 317                 {
 318                         .name  = "tx",
 319                         .start = INT_1610_McBSP2_TX,
 320                         .flags = IORESOURCE_IRQ,
 321                 },
 322                 {
 323                         .name  = "rx",
 324                         .start = OMAP_DMA_MCBSP2_RX,
 325                         .flags = IORESOURCE_DMA,
 326                 },
 327                 {
 328                         .name  = "tx",
 329                         .start = OMAP_DMA_MCBSP2_TX,
 330                         .flags = IORESOURCE_DMA,
 331                 },
 332         },
 333         {
 334                 {
 335                         .start = OMAP1610_MCBSP3_BASE,
 336                         .end   = OMAP1610_MCBSP3_BASE + SZ_256,
 337                         .flags = IORESOURCE_MEM,
 338                 },
 339                 {
 340                         .name  = "rx",
 341                         .start = INT_McBSP3RX,
 342                         .flags = IORESOURCE_IRQ,
 343                 },
 344                 {
 345                         .name  = "tx",
 346                         .start = INT_McBSP3TX,
 347                         .flags = IORESOURCE_IRQ,
 348                 },
 349                 {
 350                         .name  = "rx",
 351                         .start = OMAP_DMA_MCBSP3_RX,
 352                         .flags = IORESOURCE_DMA,
 353                 },
 354                 {
 355                         .name  = "tx",
 356                         .start = OMAP_DMA_MCBSP3_TX,
 357                         .flags = IORESOURCE_DMA,
 358                 },
 359         },
 360 };
 361
 362 #define omap16xx_mcbsp_res_0            omap16xx_mcbsp_res[0]
 363
 364 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 365         {
 366                 .ops            = &omap1_mcbsp_ops,
 367         },
 368         {
 369                 .ops            = &omap1_mcbsp_ops,
 370         },
 371         {
 372                 .ops            = &omap1_mcbsp_ops,
 373         },
 374 };
 375 #define OMAP16XX_MCBSP_RES_SZ           ARRAY_SIZE(omap16xx_mcbsp_res[1])
 376 #define OMAP16XX_MCBSP_COUNT            ARRAY_SIZE(omap16xx_mcbsp_res)
 377 #else
 378 #define omap16xx_mcbsp_res_0            NULL
 379 #define omap16xx_mcbsp_pdata            NULL
 380 #define OMAP16XX_MCBSP_RES_SZ           0
 381 #define OMAP16XX_MCBSP_COUNT            0
 382 #endif
 383
 384 static void omap_mcbsp_register_board_cfg(struct resource *res, int res_count,
 385                         struct omap_mcbsp_platform_data *config, int size)
 386 {
 387         int i;
 388
 389         omap_mcbsp_devices = kzalloc(size * sizeof(struct platform_device *),
 390                                      GFP_KERNEL);
 391         if (!omap_mcbsp_devices) {
 392                 printk(KERN_ERR "Could not register McBSP devices\n");
 393                 return;
 394         }
 395
 396         for (i = 0; i < size; i++) {
 397                 struct platform_device *new_mcbsp;
 398                 int ret;
 399
 400                 new_mcbsp = platform_device_alloc("omap-mcbsp", i + 1);
 401                 if (!new_mcbsp)
 402                         continue;
 403                 platform_device_add_resources(new_mcbsp, &res[i * res_count],
 404                                         res_count);
 405                 config[i].reg_size = 2;
 406                 config[i].reg_step = 2;
 407                 new_mcbsp->dev.platform_data = &config[i];
 408                 ret = platform_device_add(new_mcbsp);
 409                 if (ret) {
 410                         platform_device_put(new_mcbsp);
 411                         continue;
 412                 }
 413                 omap_mcbsp_devices[i] = new_mcbsp;
 414         }
 415 }
 416
 417 static int __init omap1_mcbsp_init(void)
 418 {
 419         if (!cpu_class_is_omap1())
 420                 return -ENODEV;
 421
 422         if (cpu_is_omap7xx())
 423                 omap_mcbsp_count = OMAP7XX_MCBSP_COUNT;
 424         else if (cpu_is_omap15xx())
 425                 omap_mcbsp_count = OMAP15XX_MCBSP_COUNT;
 426         else if (cpu_is_omap16xx())
 427                 omap_mcbsp_count = OMAP16XX_MCBSP_COUNT;
 428
 429         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 430                                                                 GFP_KERNEL);
 431         if (!mcbsp_ptr)
 432                 return -ENOMEM;
 433
 434         if (cpu_is_omap7xx())
 435                 omap_mcbsp_register_board_cfg(omap7xx_mcbsp_res_0,
 436                                         OMAP7XX_MCBSP_RES_SZ,
 437                                         omap7xx_mcbsp_pdata,
 438                                         OMAP7XX_MCBSP_COUNT);
 439
 440         if (cpu_is_omap15xx())
 441                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_res_0,
 442                                         OMAP15XX_MCBSP_RES_SZ,
 443                                         omap15xx_mcbsp_pdata,
 444                                         OMAP15XX_MCBSP_COUNT);
 445
 446         if (cpu_is_omap16xx())
 447                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_res_0,
 448                                         OMAP16XX_MCBSP_RES_SZ,
 449                                         omap16xx_mcbsp_pdata,
 450                                         OMAP16XX_MCBSP_COUNT);
 451
 452         return omap_mcbsp_init();
 453 }
 454
 455 arch_initcall(omap1_mcbsp_init);