arch/arm/mach-omap2/mcbsp.c

   1 /*
   2  * linux/arch/arm/mach-omap2/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 #include <linux/slab.h>
  20
  21 #include <mach/irqs.h>
  22 #include <plat/dma.h>
  23 #include <plat/cpu.h>
  24 #include <plat/mcbsp.h>
  25
  26 #include "control.h"
  27
  28
  29 /* McBSP internal signal muxing functions */
  30
  31 void omap2_mcbsp1_mux_clkr_src(u8 mux)
  32 {
  33         u32 v;
  34
  35         v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
  36         if (mux == CLKR_SRC_CLKR)
  37                 v &= ~OMAP2_MCBSP1_CLKR_MASK;
  38         else if (mux == CLKR_SRC_CLKX)
  39                 v |= OMAP2_MCBSP1_CLKR_MASK;
  40         omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
  41 }
  42 EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
  43
  44 void omap2_mcbsp1_mux_fsr_src(u8 mux)
  45 {
  46         u32 v;
  47
  48         v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
  49         if (mux == FSR_SRC_FSR)
  50                 v &= ~OMAP2_MCBSP1_FSR_MASK;
  51         else if (mux == FSR_SRC_FSX)
  52                 v |= OMAP2_MCBSP1_FSR_MASK;
  53         omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
  54 }
  55 EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
  56
  57 /* McBSP CLKS source switching function */
  58
  59 int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
  60 {
  61         struct omap_mcbsp *mcbsp;
  62         struct clk *fck_src;
  63         char *fck_src_name;
  64         int r;
  65
  66         if (!omap_mcbsp_check_valid_id(id)) {
  67                 pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
  68                 return -EINVAL;
  69         }
  70         mcbsp = id_to_mcbsp_ptr(id);
  71
  72         if (fck_src_id == MCBSP_CLKS_PAD_SRC)
  73                 fck_src_name = "pad_fck";
  74         else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
  75                 fck_src_name = "prcm_fck";
  76         else
  77                 return -EINVAL;
  78
  79         fck_src = clk_get(mcbsp->dev, fck_src_name);
  80         if (IS_ERR_OR_NULL(fck_src)) {
  81                 pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
  82                        fck_src_name);
  83                 return -EINVAL;
  84         }
  85
  86         clk_disable(mcbsp->fclk);
  87
  88         r = clk_set_parent(mcbsp->fclk, fck_src);
  89         if (IS_ERR_VALUE(r)) {
  90                 pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
  91                        "clks", fck_src_name);
  92                 clk_put(fck_src);
  93                 return -EINVAL;
  94         }
  95
  96         clk_enable(mcbsp->fclk);
  97
  98         clk_put(fck_src);
  99
 100         return 0;
 101 }
 102 EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
 103
 104
 105 /* Platform data */
 106
 107 #ifdef CONFIG_ARCH_OMAP2420
 108 static struct omap_mcbsp_platform_data omap2420_mcbsp_pdata[] = {
 109         {
 110                 .phys_base      = OMAP24XX_MCBSP1_BASE,
 111                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 112                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 113                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 114                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 115         },
 116         {
 117                 .phys_base      = OMAP24XX_MCBSP2_BASE,
 118                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 119                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 120                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 121                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 122         },
 123 };
 124 #define OMAP2420_MCBSP_PDATA_SZ         ARRAY_SIZE(omap2420_mcbsp_pdata)
 125 #define OMAP2420_MCBSP_REG_NUM          (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
 126 #else
 127 #define omap2420_mcbsp_pdata            NULL
 128 #define OMAP2420_MCBSP_PDATA_SZ         0
 129 #define OMAP2420_MCBSP_REG_NUM          0
 130 #endif
 131
 132 #ifdef CONFIG_ARCH_OMAP2430
 133 static struct omap_mcbsp_platform_data omap2430_mcbsp_pdata[] = {
 134         {
 135                 .phys_base      = OMAP24XX_MCBSP1_BASE,
 136                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 137                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 138                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 139                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 140         },
 141         {
 142                 .phys_base      = OMAP24XX_MCBSP2_BASE,
 143                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 144                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 145                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 146                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 147         },
 148         {
 149                 .phys_base      = OMAP2430_MCBSP3_BASE,
 150                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP3_RX,
 151                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP3_TX,
 152                 .rx_irq         = INT_24XX_MCBSP3_IRQ_RX,
 153                 .tx_irq         = INT_24XX_MCBSP3_IRQ_TX,
 154         },
 155         {
 156                 .phys_base      = OMAP2430_MCBSP4_BASE,
 157                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP4_RX,
 158                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP4_TX,
 159                 .rx_irq         = INT_24XX_MCBSP4_IRQ_RX,
 160                 .tx_irq         = INT_24XX_MCBSP4_IRQ_TX,
 161         },
 162         {
 163                 .phys_base      = OMAP2430_MCBSP5_BASE,
 164                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP5_RX,
 165                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP5_TX,
 166                 .rx_irq         = INT_24XX_MCBSP5_IRQ_RX,
 167                 .tx_irq         = INT_24XX_MCBSP5_IRQ_TX,
 168         },
 169 };
 170 #define OMAP2430_MCBSP_PDATA_SZ         ARRAY_SIZE(omap2430_mcbsp_pdata)
 171 #define OMAP2430_MCBSP_REG_NUM          (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
 172 #else
 173 #define omap2430_mcbsp_pdata            NULL
 174 #define OMAP2430_MCBSP_PDATA_SZ         0
 175 #define OMAP2430_MCBSP_REG_NUM          0
 176 #endif
 177
 178 #ifdef CONFIG_ARCH_OMAP3
 179 static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
 180         {
 181                 .phys_base      = OMAP34XX_MCBSP1_BASE,
 182                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 183                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 184                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 185                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 186                 .buffer_size    = 0x80, /* The FIFO has 128 locations */
 187         },
 188         {
 189                 .phys_base      = OMAP34XX_MCBSP2_BASE,
 190                 .phys_base_st   = OMAP34XX_MCBSP2_ST_BASE,
 191                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 192                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 193                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 194                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 195                 .buffer_size    = 0x500, /* The FIFO has 1024 + 256 locations */
 196         },
 197         {
 198                 .phys_base      = OMAP34XX_MCBSP3_BASE,
 199                 .phys_base_st   = OMAP34XX_MCBSP3_ST_BASE,
 200                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP3_RX,
 201                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP3_TX,
 202                 .rx_irq         = INT_24XX_MCBSP3_IRQ_RX,
 203                 .tx_irq         = INT_24XX_MCBSP3_IRQ_TX,
 204                 .buffer_size    = 0x80, /* The FIFO has 128 locations */
 205         },
 206         {
 207                 .phys_base      = OMAP34XX_MCBSP4_BASE,
 208                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP4_RX,
 209                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP4_TX,
 210                 .rx_irq         = INT_24XX_MCBSP4_IRQ_RX,
 211                 .tx_irq         = INT_24XX_MCBSP4_IRQ_TX,
 212                 .buffer_size    = 0x80, /* The FIFO has 128 locations */
 213         },
 214         {
 215                 .phys_base      = OMAP34XX_MCBSP5_BASE,
 216                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP5_RX,
 217                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP5_TX,
 218                 .rx_irq         = INT_24XX_MCBSP5_IRQ_RX,
 219                 .tx_irq         = INT_24XX_MCBSP5_IRQ_TX,
 220                 .buffer_size    = 0x80, /* The FIFO has 128 locations */
 221         },
 222 };
 223 #define OMAP34XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap34xx_mcbsp_pdata)
 224 #define OMAP34XX_MCBSP_REG_NUM          (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
 225 #else
 226 #define omap34xx_mcbsp_pdata            NULL
 227 #define OMAP34XX_MCBSP_PDATA_SZ         0
 228 #define OMAP34XX_MCBSP_REG_NUM          0
 229 #endif
 230
 231 static struct omap_mcbsp_platform_data omap44xx_mcbsp_pdata[] = {
 232         {
 233                 .phys_base      = OMAP44XX_MCBSP1_BASE,
 234                 .dma_rx_sync    = OMAP44XX_DMA_MCBSP1_RX,
 235                 .dma_tx_sync    = OMAP44XX_DMA_MCBSP1_TX,
 236                 .tx_irq         = OMAP44XX_IRQ_MCBSP1,
 237         },
 238         {
 239                 .phys_base      = OMAP44XX_MCBSP2_BASE,
 240                 .dma_rx_sync    = OMAP44XX_DMA_MCBSP2_RX,
 241                 .dma_tx_sync    = OMAP44XX_DMA_MCBSP2_TX,
 242                 .tx_irq         = OMAP44XX_IRQ_MCBSP2,
 243         },
 244         {
 245                 .phys_base      = OMAP44XX_MCBSP3_BASE,
 246                 .dma_rx_sync    = OMAP44XX_DMA_MCBSP3_RX,
 247                 .dma_tx_sync    = OMAP44XX_DMA_MCBSP3_TX,
 248                 .tx_irq         = OMAP44XX_IRQ_MCBSP3,
 249         },
 250         {
 251                 .phys_base      = OMAP44XX_MCBSP4_BASE,
 252                 .dma_rx_sync    = OMAP44XX_DMA_MCBSP4_RX,
 253                 .dma_tx_sync    = OMAP44XX_DMA_MCBSP4_TX,
 254                 .tx_irq         = OMAP44XX_IRQ_MCBSP4,
 255         },
 256 };
 257 #define OMAP44XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap44xx_mcbsp_pdata)
 258 #define OMAP44XX_MCBSP_REG_NUM          (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
 259
 260 static int __init omap2_mcbsp_init(void)
 261 {
 262         if (cpu_is_omap2420()) {
 263                 omap_mcbsp_count = OMAP2420_MCBSP_PDATA_SZ;
 264                 omap_mcbsp_cache_size = OMAP2420_MCBSP_REG_NUM * sizeof(u16);
 265         } else if (cpu_is_omap2430()) {
 266                 omap_mcbsp_count = OMAP2430_MCBSP_PDATA_SZ;
 267                 omap_mcbsp_cache_size = OMAP2430_MCBSP_REG_NUM * sizeof(u32);
 268         } else if (cpu_is_omap34xx()) {
 269                 omap_mcbsp_count = OMAP34XX_MCBSP_PDATA_SZ;
 270                 omap_mcbsp_cache_size = OMAP34XX_MCBSP_REG_NUM * sizeof(u32);
 271         } else if (cpu_is_omap44xx()) {
 272                 omap_mcbsp_count = OMAP44XX_MCBSP_PDATA_SZ;
 273                 omap_mcbsp_cache_size = OMAP44XX_MCBSP_REG_NUM * sizeof(u32);
 274         }
 275
 276         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 277                                                                 GFP_KERNEL);
 278         if (!mcbsp_ptr)
 279                 return -ENOMEM;
 280
 281         if (cpu_is_omap2420())
 282                 omap_mcbsp_register_board_cfg(omap2420_mcbsp_pdata,
 283                                                 OMAP2420_MCBSP_PDATA_SZ);
 284         if (cpu_is_omap2430())
 285                 omap_mcbsp_register_board_cfg(omap2430_mcbsp_pdata,
 286                                                 OMAP2430_MCBSP_PDATA_SZ);
 287         if (cpu_is_omap34xx())
 288                 omap_mcbsp_register_board_cfg(omap34xx_mcbsp_pdata,
 289                                                 OMAP34XX_MCBSP_PDATA_SZ);
 290         if (cpu_is_omap44xx())
 291                 omap_mcbsp_register_board_cfg(omap44xx_mcbsp_pdata,
 292                                                 OMAP44XX_MCBSP_PDATA_SZ);
 293
 294         return omap_mcbsp_init();
 295 }
 296 arch_initcall(omap2_mcbsp_init);