arch/arm/mach-ux500/board-mop500-msp.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * License terms: GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/platform_device.h>
   8 #include <linux/init.h>
   9 #include <linux/gpio.h>
  10 #include <linux/pinctrl/consumer.h>
  11
  12 #include <plat/gpio-nomadik.h>
  13 #include <plat/pincfg.h>
  14 #include <plat/ste_dma40.h>
  15
  16 #include <mach/devices.h>
  17 #include <mach/hardware.h>
  18 #include <mach/irqs.h>
  19 #include <mach/msp.h>
  20
  21 #include "ste-dma40-db8500.h"
  22 #include "board-mop500.h"
  23 #include "devices-db8500.h"
  24 #include "pins-db8500.h"
  25
  26 /* MSP1/3 Tx/Rx usage protection */
  27 static DEFINE_SPINLOCK(msp_rxtx_lock);
  28
  29 /* Reference Count */
  30 static int msp_rxtx_ref;
  31
  32 /* Pin modes */
  33 struct pinctrl *msp1_p;
  34 struct pinctrl_state *msp1_def;
  35 struct pinctrl_state *msp1_sleep;
  36
  37 int msp13_i2s_init(void)
  38 {
  39         int retval = 0;
  40         unsigned long flags;
  41
  42         spin_lock_irqsave(&msp_rxtx_lock, flags);
  43         if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_def))) {
  44                 retval = pinctrl_select_state(msp1_p, msp1_def);
  45                 if (retval)
  46                         pr_err("could not set MSP1 defstate\n");
  47         }
  48         if (!retval)
  49                 msp_rxtx_ref++;
  50         spin_unlock_irqrestore(&msp_rxtx_lock, flags);
  51
  52         return retval;
  53 }
  54
  55 int msp13_i2s_exit(void)
  56 {
  57         int retval = 0;
  58         unsigned long flags;
  59
  60         spin_lock_irqsave(&msp_rxtx_lock, flags);
  61         WARN_ON(!msp_rxtx_ref);
  62         msp_rxtx_ref--;
  63         if (msp_rxtx_ref == 0 && !(IS_ERR(msp1_p) || IS_ERR(msp1_sleep))) {
  64                 retval = pinctrl_select_state(msp1_p, msp1_sleep);
  65                 if (retval)
  66                         pr_err("could not set MSP1 sleepstate\n");
  67         }
  68         spin_unlock_irqrestore(&msp_rxtx_lock, flags);
  69
  70         return retval;
  71 }
  72
  73 static struct stedma40_chan_cfg msp0_dma_rx = {
  74         .high_priority = true,
  75         .dir = STEDMA40_PERIPH_TO_MEM,
  76
  77         .src_dev_type = DB8500_DMA_DEV31_MSP0_RX_SLIM0_CH0_RX,
  78         .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
  79
  80         .src_info.psize = STEDMA40_PSIZE_LOG_4,
  81         .dst_info.psize = STEDMA40_PSIZE_LOG_4,
  82
  83         /* data_width is set during configuration */
  84 };
  85
  86 static struct stedma40_chan_cfg msp0_dma_tx = {
  87         .high_priority = true,
  88         .dir = STEDMA40_MEM_TO_PERIPH,
  89
  90         .src_dev_type = STEDMA40_DEV_DST_MEMORY,
  91         .dst_dev_type = DB8500_DMA_DEV31_MSP0_TX_SLIM0_CH0_TX,
  92
  93         .src_info.psize = STEDMA40_PSIZE_LOG_4,
  94         .dst_info.psize = STEDMA40_PSIZE_LOG_4,
  95
  96         /* data_width is set during configuration */
  97 };
  98
  99 static struct msp_i2s_platform_data msp0_platform_data = {
 100         .id = MSP_I2S_0,
 101         .msp_i2s_dma_rx = &msp0_dma_rx,
 102         .msp_i2s_dma_tx = &msp0_dma_tx,
 103 };
 104
 105 static struct stedma40_chan_cfg msp1_dma_rx = {
 106         .high_priority = true,
 107         .dir = STEDMA40_PERIPH_TO_MEM,
 108
 109         .src_dev_type = DB8500_DMA_DEV30_MSP3_RX,
 110         .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
 111
 112         .src_info.psize = STEDMA40_PSIZE_LOG_4,
 113         .dst_info.psize = STEDMA40_PSIZE_LOG_4,
 114
 115         /* data_width is set during configuration */
 116 };
 117
 118 static struct stedma40_chan_cfg msp1_dma_tx = {
 119         .high_priority = true,
 120         .dir = STEDMA40_MEM_TO_PERIPH,
 121
 122         .src_dev_type = STEDMA40_DEV_DST_MEMORY,
 123         .dst_dev_type = DB8500_DMA_DEV30_MSP1_TX,
 124
 125         .src_info.psize = STEDMA40_PSIZE_LOG_4,
 126         .dst_info.psize = STEDMA40_PSIZE_LOG_4,
 127
 128         /* data_width is set during configuration */
 129 };
 130
 131 static struct msp_i2s_platform_data msp1_platform_data = {
 132         .id = MSP_I2S_1,
 133         .msp_i2s_dma_rx = NULL,
 134         .msp_i2s_dma_tx = &msp1_dma_tx,
 135         .msp_i2s_init = msp13_i2s_init,
 136         .msp_i2s_exit = msp13_i2s_exit,
 137 };
 138
 139 static struct stedma40_chan_cfg msp2_dma_rx = {
 140         .high_priority = true,
 141         .dir = STEDMA40_PERIPH_TO_MEM,
 142
 143         .src_dev_type = DB8500_DMA_DEV14_MSP2_RX,
 144         .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
 145
 146         /* MSP2 DMA doesn't work with PSIZE == 4 on DB8500v2 */
 147         .src_info.psize = STEDMA40_PSIZE_LOG_1,
 148         .dst_info.psize = STEDMA40_PSIZE_LOG_1,
 149
 150         /* data_width is set during configuration */
 151 };
 152
 153 static struct stedma40_chan_cfg msp2_dma_tx = {
 154         .high_priority = true,
 155         .dir = STEDMA40_MEM_TO_PERIPH,
 156
 157         .src_dev_type = STEDMA40_DEV_DST_MEMORY,
 158         .dst_dev_type = DB8500_DMA_DEV14_MSP2_TX,
 159
 160         .src_info.psize = STEDMA40_PSIZE_LOG_4,
 161         .dst_info.psize = STEDMA40_PSIZE_LOG_4,
 162
 163         .use_fixed_channel = true,
 164         .phy_channel = 1,
 165
 166         /* data_width is set during configuration */
 167 };
 168
 169 static struct platform_device *db8500_add_msp_i2s(struct device *parent,
 170                         int id,
 171                         resource_size_t base, int irq,
 172                         struct msp_i2s_platform_data *pdata)
 173 {
 174         struct platform_device *pdev;
 175         struct resource res[] = {
 176                 DEFINE_RES_MEM(base, SZ_4K),
 177                 DEFINE_RES_IRQ(irq),
 178         };
 179
 180         pr_info("Register platform-device 'ux500-msp-i2s', id %d, irq %d\n",
 181                 id, irq);
 182         pdev = platform_device_register_resndata(parent, "ux500-msp-i2s", id,
 183                                                 res, ARRAY_SIZE(res),
 184                                                 pdata, sizeof(*pdata));
 185         if (!pdev) {
 186                 pr_err("Failed to register platform-device 'ux500-msp-i2s.%d'!\n",
 187                         id);
 188                 return NULL;
 189         }
 190
 191         return pdev;
 192 }
 193
 194 /* Platform device for ASoC U8500 machine */
 195 static struct platform_device snd_soc_u8500 = {
 196                 .name = "snd-soc-u8500",
 197                 .id = 0,
 198                 .dev = {
 199                         .platform_data = NULL,
 200                 },
 201 };
 202
 203 /* Platform device for Ux500-PCM */
 204 static struct platform_device ux500_pcm = {
 205                 .name = "ux500-pcm",
 206                 .id = 0,
 207                 .dev = {
 208                         .platform_data = NULL,
 209                 },
 210 };
 211
 212 static struct msp_i2s_platform_data msp2_platform_data = {
 213         .id = MSP_I2S_2,
 214         .msp_i2s_dma_rx = &msp2_dma_rx,
 215         .msp_i2s_dma_tx = &msp2_dma_tx,
 216 };
 217
 218 static struct msp_i2s_platform_data msp3_platform_data = {
 219         .id             = MSP_I2S_3,
 220         .msp_i2s_dma_rx = &msp1_dma_rx,
 221         .msp_i2s_dma_tx = NULL,
 222         .msp_i2s_init = msp13_i2s_init,
 223         .msp_i2s_exit = msp13_i2s_exit,
 224 };
 225
 226 int mop500_msp_init(struct device *parent)
 227 {
 228         struct platform_device *msp1;
 229
 230         pr_info("%s: Register platform-device 'snd-soc-u8500'.\n", __func__);
 231         platform_device_register(&snd_soc_u8500);
 232
 233         pr_info("Initialize MSP I2S-devices.\n");
 234         db8500_add_msp_i2s(parent, 0, U8500_MSP0_BASE, IRQ_DB8500_MSP0,
 235                            &msp0_platform_data);
 236         msp1 = db8500_add_msp_i2s(parent, 1, U8500_MSP1_BASE, IRQ_DB8500_MSP1,
 237                            &msp1_platform_data);
 238         db8500_add_msp_i2s(parent, 2, U8500_MSP2_BASE, IRQ_DB8500_MSP2,
 239                            &msp2_platform_data);
 240         db8500_add_msp_i2s(parent, 3, U8500_MSP3_BASE, IRQ_DB8500_MSP1,
 241                            &msp3_platform_data);
 242
 243         /* Get the pinctrl handle for MSP1 */
 244         if (msp1) {
 245                 msp1_p = pinctrl_get(&msp1->dev);
 246                 if (IS_ERR(msp1_p))
 247                         dev_err(&msp1->dev, "could not get MSP1 pinctrl\n");
 248                 else {
 249                         msp1_def = pinctrl_lookup_state(msp1_p,
 250                                                         PINCTRL_STATE_DEFAULT);
 251                         if (IS_ERR(msp1_def)) {
 252                                 dev_err(&msp1->dev,
 253                                         "could not get MSP1 defstate\n");
 254                         }
 255                         msp1_sleep = pinctrl_lookup_state(msp1_p,
 256                                                           PINCTRL_STATE_SLEEP);
 257                         if (IS_ERR(msp1_sleep))
 258                                 dev_err(&msp1->dev,
 259                                         "could not get MSP1 idlestate\n");
 260                 }
 261         }
 262
 263         pr_info("%s: Register platform-device 'ux500-pcm'\n", __func__);
 264         platform_device_register(&ux500_pcm);
 265
 266         return 0;
 267 }