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
  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
  26 struct mcbsp_internal_clk {
  27         struct clk clk;
  28         struct clk **childs;
  29         int n_childs;
  30 };
  31
  32 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
  33 static void omap_mcbsp_clk_init(struct mcbsp_internal_clk *mclk)
  34 {
  35         const char *clk_names[] = { "mcbsp_ick", "mcbsp_fck" };
  36         int i;
  37
  38         mclk->n_childs = ARRAY_SIZE(clk_names);
  39         mclk->childs = kzalloc(mclk->n_childs * sizeof(struct clk *),
  40                                 GFP_KERNEL);
  41
  42         for (i = 0; i < mclk->n_childs; i++) {
  43                 /* We fake a platform device to get correct device id */
  44                 struct platform_device pdev;
  45
  46                 pdev.dev.bus = &platform_bus_type;
  47                 pdev.id = mclk->clk.id;
  48                 mclk->childs[i] = clk_get(&pdev.dev, clk_names[i]);
  49                 if (IS_ERR(mclk->childs[i]))
  50                         printk(KERN_ERR "Could not get clock %s (%d).\n",
  51                                 clk_names[i], mclk->clk.id);
  52         }
  53 }
  54
  55 static int omap_mcbsp_clk_enable(struct clk *clk)
  56 {
  57         struct mcbsp_internal_clk *mclk = container_of(clk,
  58                                         struct mcbsp_internal_clk, clk);
  59         int i;
  60
  61         for (i = 0; i < mclk->n_childs; i++)
  62                 clk_enable(mclk->childs[i]);
  63         return 0;
  64 }
  65
  66 static void omap_mcbsp_clk_disable(struct clk *clk)
  67 {
  68         struct mcbsp_internal_clk *mclk = container_of(clk,
  69                                         struct mcbsp_internal_clk, clk);
  70         int i;
  71
  72         for (i = 0; i < mclk->n_childs; i++)
  73                 clk_disable(mclk->childs[i]);
  74 }
  75
  76 static struct mcbsp_internal_clk omap_mcbsp_clks[] = {
  77         {
  78                 .clk = {
  79                         .name           = "mcbsp_clk",
  80                         .id             = 1,
  81                         .enable         = omap_mcbsp_clk_enable,
  82                         .disable        = omap_mcbsp_clk_disable,
  83                 },
  84         },
  85         {
  86                 .clk = {
  87                         .name           = "mcbsp_clk",
  88                         .id             = 2,
  89                         .enable         = omap_mcbsp_clk_enable,
  90                         .disable        = omap_mcbsp_clk_disable,
  91                 },
  92         },
  93         {
  94                 .clk = {
  95                         .name           = "mcbsp_clk",
  96                         .id             = 3,
  97                         .enable         = omap_mcbsp_clk_enable,
  98                         .disable        = omap_mcbsp_clk_disable,
  99                 },
 100         },
 101         {
 102                 .clk = {
 103                         .name           = "mcbsp_clk",
 104                         .id             = 4,
 105                         .enable         = omap_mcbsp_clk_enable,
 106                         .disable        = omap_mcbsp_clk_disable,
 107                 },
 108         },
 109         {
 110                 .clk = {
 111                         .name           = "mcbsp_clk",
 112                         .id             = 5,
 113                         .enable         = omap_mcbsp_clk_enable,
 114                         .disable        = omap_mcbsp_clk_disable,
 115                 },
 116         },
 117 };
 118
 119 #define omap_mcbsp_clks_size    ARRAY_SIZE(omap_mcbsp_clks)
 120 #else
 121 #define omap_mcbsp_clks_size    0
 122 static struct mcbsp_internal_clk __initdata *omap_mcbsp_clks;
 123 static inline void omap_mcbsp_clk_init(struct clk *clk)
 124 { }
 125 #endif
 126
 127 static void omap2_mcbsp2_mux_setup(void)
 128 {
 129         omap_cfg_reg(Y15_24XX_MCBSP2_CLKX);
 130         omap_cfg_reg(R14_24XX_MCBSP2_FSX);
 131         omap_cfg_reg(W15_24XX_MCBSP2_DR);
 132         omap_cfg_reg(V15_24XX_MCBSP2_DX);
 133         omap_cfg_reg(V14_24XX_GPIO117);
 134         /*
 135          * TODO: Need to add MUX settings for OMAP 2430 SDP
 136          */
 137 }
 138
 139 static void omap2_mcbsp_request(unsigned int id)
 140 {
 141         if (cpu_is_omap2420() && (id == OMAP_MCBSP2))
 142                 omap2_mcbsp2_mux_setup();
 143 }
 144
 145 static struct omap_mcbsp_ops omap2_mcbsp_ops = {
 146         .request        = omap2_mcbsp_request,
 147 };
 148
 149 #ifdef CONFIG_ARCH_OMAP2420
 150 static struct omap_mcbsp_platform_data omap2420_mcbsp_pdata[] = {
 151         {
 152                 .phys_base      = OMAP24XX_MCBSP1_BASE,
 153                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 154                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 155                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 156                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 157                 .ops            = &omap2_mcbsp_ops,
 158                 .clk_name       = "mcbsp_clk",
 159         },
 160         {
 161                 .phys_base      = OMAP24XX_MCBSP2_BASE,
 162                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 163                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 164                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 165                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 166                 .ops            = &omap2_mcbsp_ops,
 167                 .clk_name       = "mcbsp_clk",
 168         },
 169 };
 170 #define OMAP2420_MCBSP_PDATA_SZ         ARRAY_SIZE(omap2420_mcbsp_pdata)
 171 #else
 172 #define omap2420_mcbsp_pdata            NULL
 173 #define OMAP2420_MCBSP_PDATA_SZ         0
 174 #endif
 175
 176 #ifdef CONFIG_ARCH_OMAP2430
 177 static struct omap_mcbsp_platform_data omap2430_mcbsp_pdata[] = {
 178         {
 179                 .phys_base      = OMAP24XX_MCBSP1_BASE,
 180                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 181                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 182                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 183                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 184                 .ops            = &omap2_mcbsp_ops,
 185                 .clk_name       = "mcbsp_clk",
 186         },
 187         {
 188                 .phys_base      = OMAP24XX_MCBSP2_BASE,
 189                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 190                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 191                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 192                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 193                 .ops            = &omap2_mcbsp_ops,
 194                 .clk_name       = "mcbsp_clk",
 195         },
 196         {
 197                 .phys_base      = OMAP2430_MCBSP3_BASE,
 198                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP3_RX,
 199                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP3_TX,
 200                 .rx_irq         = INT_24XX_MCBSP3_IRQ_RX,
 201                 .tx_irq         = INT_24XX_MCBSP3_IRQ_TX,
 202                 .ops            = &omap2_mcbsp_ops,
 203                 .clk_name       = "mcbsp_clk",
 204         },
 205         {
 206                 .phys_base      = OMAP2430_MCBSP4_BASE,
 207                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP4_RX,
 208                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP4_TX,
 209                 .rx_irq         = INT_24XX_MCBSP4_IRQ_RX,
 210                 .tx_irq         = INT_24XX_MCBSP4_IRQ_TX,
 211                 .ops            = &omap2_mcbsp_ops,
 212                 .clk_name       = "mcbsp_clk",
 213         },
 214         {
 215                 .phys_base      = OMAP2430_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                 .ops            = &omap2_mcbsp_ops,
 221                 .clk_name       = "mcbsp_clk",
 222         },
 223 };
 224 #define OMAP2430_MCBSP_PDATA_SZ         ARRAY_SIZE(omap2430_mcbsp_pdata)
 225 #else
 226 #define omap2430_mcbsp_pdata            NULL
 227 #define OMAP2430_MCBSP_PDATA_SZ         0
 228 #endif
 229
 230 #ifdef CONFIG_ARCH_OMAP34XX
 231 static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
 232         {
 233                 .phys_base      = OMAP34XX_MCBSP1_BASE,
 234                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP1_RX,
 235                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP1_TX,
 236                 .rx_irq         = INT_24XX_MCBSP1_IRQ_RX,
 237                 .tx_irq         = INT_24XX_MCBSP1_IRQ_TX,
 238                 .ops            = &omap2_mcbsp_ops,
 239                 .clk_name       = "mcbsp_clk",
 240         },
 241         {
 242                 .phys_base      = OMAP34XX_MCBSP2_BASE,
 243                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP2_RX,
 244                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP2_TX,
 245                 .rx_irq         = INT_24XX_MCBSP2_IRQ_RX,
 246                 .tx_irq         = INT_24XX_MCBSP2_IRQ_TX,
 247                 .ops            = &omap2_mcbsp_ops,
 248                 .clk_name       = "mcbsp_clk",
 249         },
 250         {
 251                 .phys_base      = OMAP34XX_MCBSP3_BASE,
 252                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP3_RX,
 253                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP3_TX,
 254                 .rx_irq         = INT_24XX_MCBSP3_IRQ_RX,
 255                 .tx_irq         = INT_24XX_MCBSP3_IRQ_TX,
 256                 .ops            = &omap2_mcbsp_ops,
 257                 .clk_name       = "mcbsp_clk",
 258         },
 259         {
 260                 .phys_base      = OMAP34XX_MCBSP4_BASE,
 261                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP4_RX,
 262                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP4_TX,
 263                 .rx_irq         = INT_24XX_MCBSP4_IRQ_RX,
 264                 .tx_irq         = INT_24XX_MCBSP4_IRQ_TX,
 265                 .ops            = &omap2_mcbsp_ops,
 266                 .clk_name       = "mcbsp_clk",
 267         },
 268         {
 269                 .phys_base      = OMAP34XX_MCBSP5_BASE,
 270                 .dma_rx_sync    = OMAP24XX_DMA_MCBSP5_RX,
 271                 .dma_tx_sync    = OMAP24XX_DMA_MCBSP5_TX,
 272                 .rx_irq         = INT_24XX_MCBSP5_IRQ_RX,
 273                 .tx_irq         = INT_24XX_MCBSP5_IRQ_TX,
 274                 .ops            = &omap2_mcbsp_ops,
 275                 .clk_name       = "mcbsp_clk",
 276         },
 277 };
 278 #define OMAP34XX_MCBSP_PDATA_SZ         ARRAY_SIZE(omap34xx_mcbsp_pdata)
 279 #else
 280 #define omap34xx_mcbsp_pdata            NULL
 281 #define OMAP34XX_MCBSP_PDATA_SZ         0
 282 #endif
 283
 284 static int __init omap2_mcbsp_init(void)
 285 {
 286         int i;
 287
 288         for (i = 0; i < omap_mcbsp_clks_size; i++) {
 289                 /* Once we call clk_get inside init, we do not register it */
 290                 omap_mcbsp_clk_init(&omap_mcbsp_clks[i]);
 291                 clk_register(&omap_mcbsp_clks[i].clk);
 292         }
 293
 294         if (cpu_is_omap2420())
 295                 omap_mcbsp_count = OMAP2420_MCBSP_PDATA_SZ;
 296         if (cpu_is_omap2430())
 297                 omap_mcbsp_count = OMAP2430_MCBSP_PDATA_SZ;
 298         if (cpu_is_omap34xx())
 299                 omap_mcbsp_count = OMAP34XX_MCBSP_PDATA_SZ;
 300
 301         mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
 302                                                                 GFP_KERNEL);
 303         if (!mcbsp_ptr)
 304                 return -ENOMEM;
 305
 306         if (cpu_is_omap2420())
 307                 omap_mcbsp_register_board_cfg(omap2420_mcbsp_pdata,
 308                                                 OMAP2420_MCBSP_PDATA_SZ);
 309         if (cpu_is_omap2430())
 310                 omap_mcbsp_register_board_cfg(omap2430_mcbsp_pdata,
 311                                                 OMAP2430_MCBSP_PDATA_SZ);
 312         if (cpu_is_omap34xx())
 313                 omap_mcbsp_register_board_cfg(omap34xx_mcbsp_pdata,
 314                                                 OMAP34XX_MCBSP_PDATA_SZ);
 315
 316         return omap_mcbsp_init();
 317 }
 318 arch_initcall(omap2_mcbsp_init);