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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/irqs.h>
  21 #include <mach/dma.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 static int dsp_use;
  31 static struct clk *api_clk;
  32 static struct clk *dsp_clk;
  33
  34 static void omap1_mcbsp_request(unsigned int id)
  35 {
  36         /*
  37          * On 1510, 1610 and 1710, McBSP1 and McBSP3
  38          * are DSP public peripherals.
  39          */
  40         if (id == OMAP_MCBSP1 || id == OMAP_MCBSP3) {
  41                 if (dsp_use++ == 0) {
  42                         api_clk = clk_get(NULL, "api_ck");
  43                         dsp_clk = clk_get(NULL, "dsp_ck");
  44                         if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
  45                                 clk_enable(api_clk);
  46                                 clk_enable(dsp_clk);
  47
  48                                 omap_dsp_request_mem();
  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                         omap_dsp_release_mem();
  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 #ifdef CONFIG_ARCH_OMAP730
  83 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
  84         {
  85                 .phys_base      = OMAP730_MCBSP1_BASE,
  86                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
  87                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
  88                 .rx_irq         = INT_730_McBSP1RX,
  89                 .tx_irq         = INT_730_McBSP1TX,
  90                 .ops            = &omap1_mcbsp_ops,
  91         },
  92         {
  93                 .phys_base      = OMAP730_MCBSP2_BASE,
  94                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
  95                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
  96                 .rx_irq         = INT_730_McBSP2RX,
  97                 .tx_irq         = INT_730_McBSP2TX,
  98                 .ops            = &omap1_mcbsp_ops,
  99         },
 100 };
 101 #define OMAP730_MCBSP_PDATA_SZ          ARRAY_SIZE(omap730_mcbsp_pdata)
 102 #else
 103 #define omap730_mcbsp_pdata             NULL
 104 #define OMAP730_MCBSP_PDATA_SZ          0
 105 #endif
 106
 107 #ifdef CONFIG_ARCH_OMAP15XX
 108 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 109         {
 110                 .phys_base      = OMAP1510_MCBSP1_BASE,
 111                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 112                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 113                 .rx_irq         = INT_McBSP1RX,
 114                 .tx_irq         = INT_McBSP1TX,
 115                 .ops            = &omap1_mcbsp_ops,
 116         },
 117         {
 118                 .phys_base      = OMAP1510_MCBSP2_BASE,
 119                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 120                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 121                 .rx_irq         = INT_1510_SPI_RX,
 122                 .tx_irq         = INT_1510_SPI_TX,
 123                 .ops            = &omap1_mcbsp_ops,
 124         },
 125         {
 126                 .phys_base      = OMAP1510_MCBSP3_BASE,
 127                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 128                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 129                 .rx_irq         = INT_McBSP3RX,
 130                 .tx_irq         = INT_McBSP3TX,
 131                 .ops            = &omap1_mcbsp_ops,
 132         },
 133 };
 134 #define OMAP15XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap15xx_mcbsp_pdata)
 135 #else
 136 #define omap15xx_mcbsp_pdata            NULL
 137 #define OMAP15XX_MCBSP_PDATA_SZ         0
 138 #endif
 139
 140 #ifdef CONFIG_ARCH_OMAP16XX
 141 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 142         {
 143                 .phys_base      = OMAP1610_MCBSP1_BASE,
 144                 .dma_rx_sync    = OMAP_DMA_MCBSP1_RX,
 145                 .dma_tx_sync    = OMAP_DMA_MCBSP1_TX,
 146                 .rx_irq         = INT_McBSP1RX,
 147                 .tx_irq         = INT_McBSP1TX,
 148                 .ops            = &omap1_mcbsp_ops,
 149         },
 150         {
 151                 .phys_base      = OMAP1610_MCBSP2_BASE,
 152                 .dma_rx_sync    = OMAP_DMA_MCBSP2_RX,
 153                 .dma_tx_sync    = OMAP_DMA_MCBSP2_TX,
 154                 .rx_irq         = INT_1610_McBSP2_RX,
 155                 .tx_irq         = INT_1610_McBSP2_TX,
 156                 .ops            = &omap1_mcbsp_ops,
 157         },
 158         {
 159                 .phys_base      = OMAP1610_MCBSP3_BASE,
 160                 .dma_rx_sync    = OMAP_DMA_MCBSP3_RX,
 161                 .dma_tx_sync    = OMAP_DMA_MCBSP3_TX,
 162                 .rx_irq         = INT_McBSP3RX,
 163                 .tx_irq         = INT_McBSP3TX,
 164                 .ops            = &omap1_mcbsp_ops,
 165         },
 166 };
 167 #define OMAP16XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap16xx_mcbsp_pdata)
 168 #else
 169 #define omap16xx_mcbsp_pdata            NULL
 170 #define OMAP16XX_MCBSP_PDATA_SZ         0
 171 #endif
 172
 173 int __init omap1_mcbsp_init(void)
 174 {
 175         if (cpu_is_omap730())
 176                 omap_mcbsp_count = OMAP730_MCBSP_PDATA_SZ;
 177         if (cpu_is_omap15xx())
 178                 omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
 179         if (cpu_is_omap16xx())
 180                 omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
 181
 182         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 183                                                                 GFP_KERNEL);
 184         if (!mcbsp_ptr)
 185                 return -ENOMEM;
 186
 187         if (cpu_is_omap730())
 188                 omap_mcbsp_register_board_cfg(omap730_mcbsp_pdata,
 189                                                 OMAP730_MCBSP_PDATA_SZ);
 190
 191         if (cpu_is_omap15xx())
 192                 omap_mcbsp_register_board_cfg(omap15xx_mcbsp_pdata,
 193                                                 OMAP15XX_MCBSP_PDATA_SZ);
 194
 195         if (cpu_is_omap16xx())
 196                 omap_mcbsp_register_board_cfg(omap16xx_mcbsp_pdata,
 197                                                 OMAP16XX_MCBSP_PDATA_SZ);
 198
 199         return omap_mcbsp_init();
 200 }
 201
 202 arch_initcall(omap1_mcbsp_init);