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   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/module.h>
  14 #include <linux/init.h>
  15 #include <linux/clk.h>
  16 #include <linux/err.h>
  17 #include <linux/io.h>
  18 #include <linux/platform_device.h>
  19
  20 #include <mach/dma.h>
  21 #include <mach/mux.h>
  22 #include <mach/cpu.h>
  23 #include <mach/mcbsp.h>
  24 #include <mach/dsp_common.h>
  25
  26 #define DPS_RSTCT2_PER_EN       (1 << 0)
  27 #define DSP_RSTCT2_WD_PER_EN    (1 << 1)
  28
  29 struct mcbsp_internal_clk {
  30         struct clk clk;
  31         struct clk **childs;
  32         int n_childs;
  33 };
  34
  35 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
  36 static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
  37 {
  38         const char *clk_names[] = { "dsp_ck", "api_ck", "dspxor_ck" };
  39         int i;
  40
  41         mclk->n_childs = ARRAY_SIZE(clk_names);
  42         mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *),
  43                                 GFP_KERNEL);
  44
  45         for (i = 0; i < mclk->n_childs; i++) {
  46                 /* We fake a platform device to get correct device id */
  47                 struct platform_device pdev;
  48
  49                 pdev.dev.bus = &platform_bus_type;
  50                 pdev.id = mclk->clk.id;
  51                 mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]);
  52                 if (IS_ERR(mclk->childs[i]))
  53                         printk(KERN_ERR "Could not get clock %s (%d).\n",
  54                                 clk_names[i], mclk->clk.id);
  55         }
  56 }
  57
  58 static int omap_mcbsp_clk_enable(struct clk *clk)
  59 {
  60         struct mcbsp_internal_clk *mclk = container_of(clk,
  61                                         struct mcbsp_internal_clk, clk);
  62         int i;
  63
  64         for (i = 0; i < mclk->n_childs; i++)
  65                 clk_enable(mclk->childs[i]);
  66         return 0;
  67 }
  68
  69 static void omap_mcbsp_clk_disable(struct clk *clk)
  70 {
  71         struct mcbsp_internal_clk *mclk = container_of(clk,
  72                                         struct mcbsp_internal_clk, clk);
  73         int i;
  74
  75         for (i = 0; i < mclk->n_childs; i++)
  76                 clk_disable(mclk->childs[i]);
  77 }
  78
  79 static struct mcbsp_internal_clk omap_mcbsp_clks[] = {
  80         {
  81                 .clk = {
  82                         .name           = "mcbsp_clk",
  83                         .id             = 1,
  84                         .enable         = omap_mcbsp_clk_enable,
  85                         .disable        = omap_mcbsp_clk_disable,
  86                 },
  87         },
  88         {
  89                 .clk = {
  90                         .name           = "mcbsp_clk",
  91                         .id             = 3,
  92                         .enable         = omap_mcbsp_clk_enable,
  93                         .disable        = omap_mcbsp_clk_disable,
  94                 },
  95         },
  96 };
  97
  98 #define omap_mcbsp_clks_size    ARRAY_SIZE(omap_mcbsp_clks)
  99 #else
 100 #define omap_mcbsp_clks_size    0
 101 static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks;
 102 static inline void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
 103 { }
 104 #endif
 105
 106 static void omap1_mcbsp_request(unsigned int id)
 107 {
 108         /*
 109          * On 1510, 1610 and 1710, McBSP1 and McBSP3
 110          * are DSP public peripherals.
 111          */
 112         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
 113                 omap_dsp_request_mem();
 114                 /*
 115                  * DSP external peripheral reset
 116                  * FIXME: This should be moved to dsp code
 117                  */
 118                 __raw_writew(__raw_readw(DSP_RSTCT2) | DPS_RSTCT2_PER_EN |
 119                                 DSP_RSTCT2_WD_PER_EN, DSP_RSTCT2);
 120         }
 121 }
 122
 123 static void omap1_mcbsp_free(unsigned int id)
 124 {
 125         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3)
 126                 omap_dsp_release_mem();
 127 }
 128
 129 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
 130         .request        = omap1_mcbsp_request,
 131         .free           = omap1_mcbsp_free,
 132 };
 133
 134 #ifdef CONFIG_ARCH_OMAP730
 135 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
 136         {
 137                 .phys_base      = OMAP730_MCBSP1_BASE,
 138                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 139                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 140                 .rx_irq         = INT_730_McBSP1RX,
 141                 .tx_irq         = INT_730_McBSP1TX,
 142                 .ops            = &omap1_mcbsp_ops,
 143         },
 144         {
 145                 .phys_base      = OMAP730_MCBSP2_BASE,
 146                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 147                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 148                 .rx_irq         = INT_730_McBSP2RX,
 149                 .tx_irq         = INT_730_McBSP2TX,
 150                 .ops            = &omap1_mcbsp_ops,
 151         },
 152 };
 153 #define OMAP730_MCBSP_PDATA_SZ          ARRAY_SIZE(omap730_mcbsp_pdata)
 154 #else
 155 #define omap730_mcbsp_pdata             NULL
 156 #define OMAP730_MCBSP_PDATA_SZ          0
 157 #endif
 158
 159 #ifdef CONFIG_ARCH_OMAP15XX
 160 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 161         {
 162                 .phys_base      = OMAP1510_MCBSP1_BASE,
 163                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 164                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 165                 .rx_irq         = INT_McBSP1RX,
 166                 .tx_irq         = INT_McBSP1TX,
 167                 .ops            = &omap1_mcbsp_ops,
 168                 .clk_name       = "mcbsp_clk",
 169                 },
 170         {
 171                 .phys_base      = OMAP1510_MCBSP2_BASE,
 172                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 173                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 174                 .rx_irq         = INT_1510_SPI_RX,
 175                 .tx_irq         = INT_1510_SPI_TX,
 176                 .ops            = &omap1_mcbsp_ops,
 177         },
 178         {
 179                 .phys_base      = OMAP1510_MCBSP3_BASE,
 180                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 181                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 182                 .rx_irq         = INT_McBSP3RX,
 183                 .tx_irq         = INT_McBSP3TX,
 184                 .ops            = &omap1_mcbsp_ops,
 185                 .clk_name       = "mcbsp_clk",
 186         },
 187 };
 188 #define OMAP15XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap15xx_mcbsp_pdata)
 189 #else
 190 #define omap15xx_mcbsp_pdata            NULL
 191 #define OMAP15XX_MCBSP_PDATA_SZ         0
 192 #endif
 193
 194 #ifdef CONFIG_ARCH_OMAP16XX
 195 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 196         {
 197                 .phys_base      = OMAP1610_MCBSP1_BASE,
 198                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 199                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 200                 .rx_irq         = INT_McBSP1RX,
 201                 .tx_irq         = INT_McBSP1TX,
 202                 .ops            = &omap1_mcbsp_ops,
 203                 .clk_name       = "mcbsp_clk",
 204         },
 205         {
 206                 .phys_base      = OMAP1610_MCBSP2_BASE,
 207                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 208                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 209                 .rx_irq         = INT_1610_McBSP2_RX,
 210                 .tx_irq         = INT_1610_McBSP2_TX,
 211                 .ops            = &omap1_mcbsp_ops,
 212         },
 213         {
 214                 .phys_base      = OMAP1610_MCBSP3_BASE,
 215                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 216                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 217                 .rx_irq         = INT_McBSP3RX,
 218                 .tx_irq         = INT_McBSP3TX,
 219                 .ops            = &omap1_mcbsp_ops,
 220                 .clk_name       = "mcbsp_clk",
 221         },
 222 };
 223 #define OMAP16XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap16xx_mcbsp_pdata)
 224 #else
 225 #define omap16xx_mcbsp_pdata            NULL
 226 #define OMAP16XX_MCBSP_PDATA_SZ         0
 227 #endif
 228
 229 int __init omap1_mcbsp_init(void)
 230 {
 231         int i;
 232
 233         for (i = 0; i < omap_mcbsp_clks_size; i++) {
 234                 if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
 235                         omap_mcbsp_clk_init(&omap_mcbsp_clks[i]);
 236                         clk_register(&omap_mcbsp_clks[i].clk);
 237                 }
 238         }
 239
 240         if (cpu_is_omap730())
 241                 omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ;
 242         if (cpu_is_omap15xx())
 243                 omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
 244         if (cpu_is_omap16xx())
 245                 omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
 246
 247         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 248                                                                 GFP_KERNEL);
 249         if (!mcbsp_ptr)
 250                 return -ENOMEM;
 251
 252         if (cpu_is_omap730())
 253                 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
 254                                                 OMAP730_MCBSP_PDATA_SZ);
 255
 256         if (cpu_is_omap15xx())
 257                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
 258                                                 OMAP15XX_MCBSP_PDATA_SZ);
 259
 260         if (cpu_is_omap16xx())
 261                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
 262                                                 OMAP16XX_MCBSP_PDATA_SZ);
 263
 264         return omap_mcbsp_init();
 265 }
 266
 267 arch_initcall(omap1_mcbsp_init);