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/irqs.h>
  21 #include <mach/dma.h>
  22 #include <mach/irqs.h>
  23 #include <mach/mux.h>
  24 #include <mach/cpu.h>
  25 #include <mach/mcbsp.h>
  26 #include <mach/dsp_common.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                                 omap_dsp_request_mem();
  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 == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
  64                 if (--dsp_use == 0) {
  65                         omap_dsp_release_mem();
  66                         if (!IS_ERR(api_clk)) {
  67                                 clk_disable(api_clk);
  68                                 clk_put(api_clk);
  69                         }
  70                         if (!IS_ERR(dsp_clk)) {
  71                                 clk_disable(dsp_clk);
  72                                 clk_put(dsp_clk);
  73                         }
  74                 }
  75         }
  76 }
  77
  78 static struct omap_mcbsp_ops omap1_mcbsp_ops = {
  79         .request        = omap1_mcbsp_request,
  80         .free           = omap1_mcbsp_free,
  81 };
  82
  83 #ifdef CONFIG_ARCH_OMAP730
  84 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
  85         {
  86                 .phys_base      = OMAP730_MCBSP1_BASE,
  87                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
  88                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
  89                 .rx_irq         = INT_730_McBSP1RX,
  90                 .tx_irq         = INT_730_McBSP1TX,
  91                 .ops            = &omap1_mcbsp_ops,
  92         },
  93         {
  94                 .phys_base      = OMAP730_MCBSP2_BASE,
  95                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
  96                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
  97                 .rx_irq         = INT_730_McBSP2RX,
  98                 .tx_irq         = INT_730_McBSP2TX,
  99                 .ops            = &omap1_mcbsp_ops,
 100         },
 101 };
 102 #define OMAP730_MCBSP_PDATA_SZ          ARRAY_SIZE(omap730_mcbsp_pdata)
 103 #else
 104 #define omap730_mcbsp_pdata             NULL
 105 #define OMAP730_MCBSP_PDATA_SZ          0
 106 #endif
 107
 108 #ifdef CONFIG_ARCH_OMAP15XX
 109 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 110         {
 111                 .phys_base      = OMAP1510_MCBSP1_BASE,
 112                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 113                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 114                 .rx_irq         = INT_McBSP1RX,
 115                 .tx_irq         = INT_McBSP1TX,
 116                 .ops            = &omap1_mcbsp_ops,
 117         },
 118         {
 119                 .phys_base      = OMAP1510_MCBSP2_BASE,
 120                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 121                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 122                 .rx_irq         = INT_1510_SPI_RX,
 123                 .tx_irq         = INT_1510_SPI_TX,
 124                 .ops            = &omap1_mcbsp_ops,
 125         },
 126         {
 127                 .phys_base      = OMAP1510_MCBSP3_BASE,
 128                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 129                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 130                 .rx_irq         = INT_McBSP3RX,
 131                 .tx_irq         = INT_McBSP3TX,
 132                 .ops            = &omap1_mcbsp_ops,
 133         },
 134 };
 135 #define OMAP15XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap15xx_mcbsp_pdata)
 136 #else
 137 #define omap15xx_mcbsp_pdata            NULL
 138 #define OMAP15XX_MCBSP_PDATA_SZ         0
 139 #endif
 140
 141 #ifdef CONFIG_ARCH_OMAP16XX
 142 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 143         {
 144                 .phys_base      = OMAP1610_MCBSP1_BASE,
 145                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 146                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 147                 .rx_irq         = INT_McBSP1RX,
 148                 .tx_irq         = INT_McBSP1TX,
 149                 .ops            = &omap1_mcbsp_ops,
 150         },
 151         {
 152                 .phys_base      = OMAP1610_MCBSP2_BASE,
 153                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 154                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 155                 .rx_irq         = INT_1610_McBSP2_RX,
 156                 .tx_irq         = INT_1610_McBSP2_TX,
 157                 .ops            = &omap1_mcbsp_ops,
 158         },
 159         {
 160                 .phys_base      = OMAP1610_MCBSP3_BASE,
 161                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 162                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 163                 .rx_irq         = INT_McBSP3RX,
 164                 .tx_irq         = INT_McBSP3TX,
 165                 .ops            = &omap1_mcbsp_ops,
 166         },
 167 };
 168 #define OMAP16XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap16xx_mcbsp_pdata)
 169 #else
 170 #define omap16xx_mcbsp_pdata            NULL
 171 #define OMAP16XX_MCBSP_PDATA_SZ         0
 172 #endif
 173
 174 int __init omap1_mcbsp_init(void)
 175 {
 176         if (cpu_is_omap730())
 177                 omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ;
 178         if (cpu_is_omap15xx())
 179                 omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
 180         if (cpu_is_omap16xx())
 181                 omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
 182
 183         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 184                                                                 GFP_KERNEL);
 185         if (!mcbsp_ptr)
 186                 return -ENOMEM;
 187
 188         if (cpu_is_omap730())
 189                 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
 190                                                 OMAP730_MCBSP_PDATA_SZ);
 191
 192         if (cpu_is_omap15xx())
 193                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
 194                                                 OMAP15XX_MCBSP_PDATA_SZ);
 195
 196         if (cpu_is_omap16xx())
 197                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
 198                                                 OMAP16XX_MCBSP_PDATA_SZ);
 199
 200         return omap_mcbsp_init();
 201 }
 202
 203 arch_initcall(omap1_mcbsp_init);