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