arch/arm/mach-omap2/board-ldp.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-ldp.c
   3  *
   4  * Copyright (C) 2008 Texas Instruments Inc.
   5  * Nishant Kamat <nskamat@ti.com>
   6  *
   7  * Modified from mach-omap2/board-3430sdp.c
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/delay.h>
  18 #include <linux/input.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/err.h>
  21 #include <linux/clk.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/spi/ads7846.h>
  24 #include <linux/i2c/twl4030.h>
  25 #include <linux/i2c/twl4030-rtc.h>
  26
  27 #include <asm/hardware.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31
  32 #include <asm/arch/mcspi.h>
  33 #include <asm/arch/gpio.h>
  34 #include <asm/arch/board.h>
  35 #include <asm/arch/common.h>
  36 #include <asm/arch/gpmc.h>
  37 #include <asm/arch/hsmmc.h>
  38 #include <asm/arch/usb-musb.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/delay.h>
  42 #include <asm/arch/control.h>
  43
  44 #define ENABLE_VAUX1_DEDICATED  0x03
  45 #define ENABLE_VAUX1_DEV_GRP    0x20
  46
  47 #define TWL4030_MSECURE_GPIO    22
  48
  49 static int ts_gpio;
  50
  51 #ifdef CONFIG_RTC_DRV_TWL4030
  52 static int twl4030_rtc_init(void)
  53 {
  54         int ret = 0;
  55
  56         /* 3430ES2.0 doesn't have msecure/gpio-22 line connected to T2 */
  57         if (is_device_type_gp() && is_sil_rev_less_than(OMAP3430_REV_ES2_0)) {
  58                 u32 msecure_pad_config_reg = omap_ctrl_base_get() + 0xA3C;
  59                 int mux_mask = 0x04;
  60                 u16 tmp;
  61
  62                 ret = omap_request_gpio(TWL4030_MSECURE_GPIO);
  63                 if (ret < 0) {
  64                         printk(KERN_ERR "twl4030_rtc_init: can't"
  65                                 "reserve GPIO:%d !\n", TWL4030_MSECURE_GPIO);
  66                         goto out;
  67                 }
  68                 /*
  69                  * TWL4030 will be in secure mode if msecure line from OMAP
  70                  * is low. Make msecure line high in order to change the
  71                  * TWL4030 RTC time and calender registers.
  72                  */
  73                 omap_set_gpio_direction(TWL4030_MSECURE_GPIO, 0);
  74
  75                 tmp = omap_readw(msecure_pad_config_reg);
  76                 tmp &= 0xF8;    /* To enable mux mode 03/04 = GPIO_RTC */
  77                 tmp |= mux_mask;/* To enable mux mode 03/04 = GPIO_RTC */
  78                 omap_writew(tmp, msecure_pad_config_reg);
  79
  80                 omap_set_gpio_dataout(TWL4030_MSECURE_GPIO, 1);
  81         }
  82 out:
  83         return ret;
  84 }
  85
  86 static void twl4030_rtc_exit(void)
  87 {
  88         omap_free_gpio(TWL4030_MSECURE_GPIO);
  89 }
  90
  91 static struct twl4030rtc_platform_data ldp_twl4030rtc_data = {
  92         .init = &twl4030_rtc_init,
  93         .exit = &twl4030_rtc_exit,
  94 };
  95
  96 static struct platform_device ldp_twl4030rtc_device = {
  97         .name           = "twl4030_rtc",
  98         .id             = -1,
  99         .dev            = {
 100                 .platform_data  = &ldp_twl4030rtc_data,
 101         },
 102 };
 103 #endif
 104
 105 /**
 106  * @brief ads7846_dev_init : Requests & sets GPIO line for pen-irq
 107  *
 108  * @return - void. If request gpio fails then Flag KERN_ERR.
 109  */
 110 static void ads7846_dev_init(void)
 111 {
 112         if (omap_request_gpio(ts_gpio) < 0) {
 113                 printk(KERN_ERR "can't get ads746 pen down GPIO\n");
 114                 return;
 115         }
 116
 117         omap_set_gpio_direction(ts_gpio, 1);
 118
 119         omap_set_gpio_debounce(ts_gpio, 1);
 120         omap_set_gpio_debounce_time(ts_gpio, 0xa);
 121 }
 122
 123 static int ads7846_get_pendown_state(void)
 124 {
 125         return !omap_get_gpio_datain(ts_gpio);
 126 }
 127
 128 /*
 129  * This enable(1)/disable(0) the voltage for TS: uses twl4030 calls
 130  */
 131 static int ads7846_vaux_control(int vaux_cntrl)
 132 {
 133         int ret = 0;
 134
 135 #ifdef CONFIG_TWL4030_CORE
 136         /* check for return value of ldo_use: if success it returns 0 */
 137         if (vaux_cntrl == VAUX_ENABLE) {
 138                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 139                         ENABLE_VAUX1_DEDICATED, TWL4030_VAUX1_DEDICATED))
 140                         return -EIO;
 141                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 142                         ENABLE_VAUX1_DEV_GRP, TWL4030_VAUX1_DEV_GRP))
 143                         return -EIO;
 144         } else if (vaux_cntrl == VAUX_DISABLE) {
 145                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 146                         0x00, TWL4030_VAUX1_DEDICATED))
 147                         return -EIO;
 148                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 149                         0x00, TWL4030_VAUX1_DEV_GRP))
 150                         return -EIO;
 151         }
 152 #else
 153         ret = -EIO;
 154 #endif
 155         return ret;
 156 }
 157
 158 static struct ads7846_platform_data tsc2046_config __initdata = {
 159         .get_pendown_state      = ads7846_get_pendown_state,
 160         .keep_vref_on           = 1,
 161         .vaux_control           = ads7846_vaux_control,
 162 };
 163
 164
 165 static struct omap2_mcspi_device_config tsc2046_mcspi_config = {
 166         .turbo_mode     = 0,
 167         .single_channel = 1,  /* 0: slave, 1: master */
 168 };
 169
 170 static struct spi_board_info ldp_spi_board_info[] __initdata = {
 171         [0] = {
 172                 /*
 173                  * TSC2046 operates at a max freqency of 2MHz, so
 174                  * operate slightly below at 1.5MHz
 175                  */
 176                 .modalias               = "ads7846",
 177                 .bus_num                = 1,
 178                 .chip_select            = 0,
 179                 .max_speed_hz           = 1500000,
 180                 .controller_data        = &tsc2046_mcspi_config,
 181                 .irq                    = 0,
 182                 .platform_data          = &tsc2046_config,
 183         },
 184 };
 185
 186 static struct platform_device *ldp_devices[] __initdata = {
 187 #ifdef CONFIG_RTC_DRV_TWL4030
 188         &ldp_twl4030rtc_device,
 189 #endif
 190 };
 191
 192 static void __init omap_ldp_init_irq(void)
 193 {
 194         omap2_init_common_hw(NULL);
 195         omap_init_irq();
 196         omap_gpio_init();
 197 }
 198
 199 static struct omap_uart_config ldp_uart_config __initdata = {
 200         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 201 };
 202
 203 static struct omap_mmc_config ldp_mmc_config __initdata = {
 204         .mmc [0] = {
 205                 .enabled        = 1,
 206                 .wire4          = 1,
 207         },
 208 };
 209
 210 static struct omap_board_config_kernel ldp_config[] __initdata = {
 211         { OMAP_TAG_UART,        &ldp_uart_config },
 212         { OMAP_TAG_MMC,         &ldp_mmc_config },
 213 };
 214
 215 static int __init omap_i2c_init(void)
 216 {
 217         omap_register_i2c_bus(1, 2600, NULL, 0);
 218         omap_register_i2c_bus(2, 400, NULL, 0);
 219         omap_register_i2c_bus(3, 400, NULL, 0);
 220         return 0;
 221 }
 222
 223 static void __init omap_ldp_init(void)
 224 {
 225         platform_add_devices(ldp_devices, ARRAY_SIZE(ldp_devices));
 226         omap_board_config = ldp_config;
 227         omap_board_config_size = ARRAY_SIZE(ldp_config);
 228         ts_gpio = 54;
 229         ldp_spi_board_info[0].irq = OMAP_GPIO_IRQ(ts_gpio);
 230         spi_register_board_info(ldp_spi_board_info,
 231                                 ARRAY_SIZE(ldp_spi_board_info));
 232         ads7846_dev_init();
 233         omap_serial_init();
 234         usb_musb_init();
 235         hsmmc_init();
 236 }
 237
 238 static void __init omap_ldp_map_io(void)
 239 {
 240         omap2_set_globals_343x();
 241         omap2_map_common_io();
 242 }
 243 arch_initcall(omap_i2c_init);
 244
 245 MACHINE_START(OMAP_LDP, "OMAP LDP board")
 246         .phys_io        = 0x48000000,
 247         .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
 248         .boot_params    = 0x80000100,
 249         .map_io         = omap_ldp_map_io,
 250         .init_irq       = omap_ldp_init_irq,
 251         .init_machine   = omap_ldp_init,
 252         .timer          = &omap_timer,
 253 MACHINE_END