arch/arm/mach-omap2/board-sdp-hsmmc.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-sdp-hsmmc.c
   3  *
   4  * Copyright (C) 2007 Texas Instruments
   5  * Author: Texas Instruments
   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 #include <linux/err.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/delay.h>
  16 #include <asm/hardware.h>
  17 #include <asm/arch/twl4030.h>
  18 #include <asm/arch/mmc.h>
  19 #include <asm/arch/board.h>
  20 #include <asm/io.h>
  21
  22 #if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
  23
  24 #define VMMC1_DEV_GRP           0x27
  25 #define P1_DEV_GRP              0x20
  26 #define VMMC1_DEDICATED         0x2A
  27 #define VSEL_3V                 0x02
  28 #define VSEL_18V                0x00
  29 #define TWL_GPIO_PUPDCTR1       0x13
  30 #define TWL_GPIO_IMR1A          0x1C
  31 #define TWL_GPIO_ISR1A          0x19
  32 #define LDO_CLR                 0x00
  33 #define VSEL_S2_CLR             0x40
  34 #define GPIO_0_BIT_POS          1 << 0
  35 #define MMC1_CD_IRQ             0
  36 #define MMC2_CD_IRQ             1
  37
  38 static int sdp_mmc_card_detect(int irq)
  39 {
  40         return twl4030_get_gpio_datain(irq - IH_TWL4030_GPIO_BASE);
  41 }
  42
  43 /*
  44  * MMC Slot Initialization.
  45  */
  46 static int sdp_mmc_late_init(struct device *dev)
  47 {
  48         int ret = 0;
  49
  50         /*
  51          * Configure TWL4030 GPIO parameters for MMC hotplug irq
  52          */
  53         ret = twl4030_request_gpio(MMC1_CD_IRQ);
  54         if (ret != 0)
  55                 goto err;
  56
  57         ret = twl4030_set_gpio_edge_ctrl(MMC1_CD_IRQ,
  58                         TWL4030_GPIO_EDGE_RISING | TWL4030_GPIO_EDGE_FALLING);
  59         if (ret != 0)
  60                 goto err;
  61
  62         ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, 0x02,
  63                                                 TWL_GPIO_PUPDCTR1);
  64         if (ret != 0)
  65                 goto err;
  66
  67         ret = twl4030_set_gpio_debounce(MMC1_CD_IRQ, TWL4030_GPIO_IS_ENABLE);
  68         if (ret != 0)
  69                 goto err;
  70
  71         return ret;
  72 err:
  73         dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
  74
  75         return ret;
  76 }
  77
  78 static void sdp_mmc_cleanup(struct device *dev)
  79 {
  80         int ret = 0;
  81
  82         ret = twl4030_free_gpio(MMC1_CD_IRQ);
  83         if (ret != 0)
  84                 dev_err(dev, "Failed to configure TWL4030 GPIO IRQ\n");
  85 }
  86
  87 #ifdef CONFIG_PM
  88
  89 /*
  90  * To mask and unmask MMC Card Detect Interrupt
  91  * mask : 1
  92  * unmask : 0
  93  */
  94 static int mask_cd_interrupt(int mask)
  95 {
  96         u8 reg = 0, ret = 0;
  97
  98         ret = twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &reg, TWL_GPIO_IMR1A);
  99         if (ret != 0)
 100                 goto err;
 101
 102         reg = (mask == 1) ? (reg | GPIO_0_BIT_POS) : (reg & ~GPIO_0_BIT_POS);
 103
 104         ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, reg, TWL_GPIO_IMR1A);
 105         if (ret != 0)
 106                 goto err;
 107
 108         ret = twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &reg, TWL_GPIO_ISR1A);
 109         if (ret != 0)
 110                 goto err;
 111
 112         reg = (mask == 1) ? (reg | GPIO_0_BIT_POS) : (reg & ~GPIO_0_BIT_POS);
 113
 114         ret = twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, reg, TWL_GPIO_ISR1A);
 115         if (ret != 0)
 116                 goto err;
 117 err:
 118         return ret;
 119 }
 120
 121 static int sdp_mmc_suspend(struct device *dev, int slot)
 122 {
 123         int ret = 0;
 124
 125         disable_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ));
 126         ret = mask_cd_interrupt(1);
 127
 128         return ret;
 129 }
 130
 131 static int sdp_mmc_resume(struct device *dev, int slot)
 132 {
 133         int ret = 0;
 134
 135         enable_irq(TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ));
 136         ret = mask_cd_interrupt(0);
 137
 138         return ret;
 139 }
 140
 141 #endif
 142
 143 static int sdp_mmc_set_power(struct device *dev, int slot, int power_on,
 144                                 int vdd)
 145 {
 146         u32 vdd_sel = 0, devconf = 0, reg = 0;
 147         int ret = 0;
 148
 149         /* REVISIT: Using address directly till the control.h defines
 150          * are settled.
 151          */
 152 #if defined(CONFIG_ARCH_OMAP2430)
 153         #define OMAP2_CONTROL_PBIAS 0x490024A0
 154 #else
 155         #define OMAP2_CONTROL_PBIAS 0x48002520
 156 #endif
 157
 158         if (power_on == 1) {
 159                 if (cpu_is_omap24xx())
 160                         devconf = omap_readl(0x490022E8);
 161                 else
 162                         devconf = omap_readl(0x48002274);
 163
 164                 switch (1 << vdd) {
 165                 case MMC_VDD_33_34:
 166                 case MMC_VDD_32_33:
 167                         vdd_sel = VSEL_3V;
 168                         if (cpu_is_omap24xx())
 169                                 devconf = (devconf | (1 << 31));
 170                         break;
 171                 case MMC_VDD_165_195:
 172                         vdd_sel = VSEL_18V;
 173                         if (cpu_is_omap24xx())
 174                                 devconf = (devconf & ~(1 << 31));
 175                 }
 176
 177                 if (cpu_is_omap24xx())
 178                         omap_writel(devconf, 0x490022E8);
 179                 else
 180                         omap_writel(devconf | 1 << 24, 0x48002274);
 181
 182                 omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) | 1 << 2,
 183                         OMAP2_CONTROL_PBIAS);
 184                 omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) & ~(1 << 1),
 185                         OMAP2_CONTROL_PBIAS);
 186
 187                 ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 188                                                 P1_DEV_GRP, VMMC1_DEV_GRP);
 189                 if (ret != 0)
 190                         goto err;
 191
 192                 ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 193                                                 vdd_sel, VMMC1_DEDICATED);
 194                 if (ret != 0)
 195                         goto err;
 196
 197                 msleep(100);
 198                 reg = omap_readl(OMAP2_CONTROL_PBIAS);
 199                 reg = (vdd_sel == VSEL_18V) ? ((reg | 0x6) & ~0x1)
 200                                                 : (reg | 0x7);
 201                 omap_writel(reg, OMAP2_CONTROL_PBIAS);
 202
 203                 return ret;
 204
 205         } else if (power_on == 0) {
 206                 /* Power OFF */
 207
 208                 /* For MMC1, Toggle PBIAS before every power up sequence */
 209                 omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) & ~(1 << 1),
 210                                         OMAP2_CONTROL_PBIAS);
 211                 ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 212                                                 LDO_CLR, VMMC1_DEV_GRP);
 213                 if (ret != 0)
 214                         goto err;
 215
 216                 ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 217                                                 VSEL_S2_CLR, VMMC1_DEDICATED);
 218                 if (ret != 0)
 219                         goto err;
 220
 221                 /* 100ms delay required for PBIAS configuration */
 222                 msleep(100);
 223                 omap_writel(omap_readl(OMAP2_CONTROL_PBIAS) | 0x7,
 224                         OMAP2_CONTROL_PBIAS);
 225         } else {
 226                 ret = -1;
 227                 goto err;
 228         }
 229
 230         return 0;
 231 err:
 232         return 1;
 233 }
 234
 235 static struct omap_mmc_platform_data sdp_mmc_data = {
 236         .nr_slots                       = 1,
 237         .switch_slot                    = NULL,
 238         .init                           = sdp_mmc_late_init,
 239         .cleanup                        = sdp_mmc_cleanup,
 240 #ifdef CONFIG_PM
 241         .suspend                        = sdp_mmc_suspend,
 242         .resume                         = sdp_mmc_resume,
 243 #endif
 244         .slots[0] = {
 245                 .set_power              = sdp_mmc_set_power,
 246                 .set_bus_mode           = NULL,
 247                 .get_ro                 = NULL,
 248                 .get_cover_state        = NULL,
 249                 .ocr_mask               = MMC_VDD_32_33 | MMC_VDD_33_34 |
 250                                                 MMC_VDD_165_195,
 251                 .name                   = "first slot",
 252
 253                 .card_detect_irq        = TWL4030_GPIO_IRQ_NO(MMC1_CD_IRQ),
 254                 .card_detect            = sdp_mmc_card_detect,
 255         },
 256 };
 257
 258 void __init sdp_mmc_init(void)
 259 {
 260         omap_set_mmc_info(1, &sdp_mmc_data);
 261 }
 262
 263 #else
 264
 265 void __init sdp_mmc_init(void)
 266 {
 267
 268 }
 269
 270 #endif