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
  26 #include <mach/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30
  31 #include <mach/board-ldp.h>
  32 #include <mach/mcspi.h>
  33 #include <mach/gpio.h>
  34 #include <mach/board.h>
  35 #include <mach/common.h>
  36 #include <mach/gpmc.h>
  37 #include <mach/hsmmc.h>
  38 #include <mach/usb-musb.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/delay.h>
  42 #include <mach/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 static int __init msecure_init(void)
  52 {
  53         int ret = 0;
  54
  55 #ifdef CONFIG_RTC_DRV_TWL4030
  56         /* 3430ES2.0 doesn't have msecure/gpio-22 line connected to T2 */
  57         if (omap_device_type() == OMAP2_DEVICE_TYPE_GP &&
  58                         system_rev < OMAP3430_REV_ES2_0) {
  59                 u32 msecure_pad_config_reg = omap_ctrl_base_get() + 0xA3C;
  60                 int mux_mask = 0x04;
  61                 u16 tmp;
  62
  63                 ret = gpio_request(TWL4030_MSECURE_GPIO, "msecure");
  64                 if (ret < 0) {
  65                         printk(KERN_ERR "msecure_init: can't"
  66                                 "reserve GPIO:%d !\n", TWL4030_MSECURE_GPIO);
  67                         goto out;
  68                 }
  69                 /*
  70                  * TWL4030 will be in secure mode if msecure line from OMAP
  71                  * is low. Make msecure line high in order to change the
  72                  * TWL4030 RTC time and calender registers.
  73                  */
  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                 gpio_direction_output(TWL4030_MSECURE_GPIO, 1);
  81         }
  82 out:
  83 #endif
  84         return ret;
  85 }
  86
  87 /**
  88  * @brief ads7846_dev_init : Requests & sets GPIO line for pen-irq
  89  *
  90  * @return - void. If request gpio fails then Flag KERN_ERR.
  91  */
  92 static void ads7846_dev_init(void)
  93 {
  94         if (omap_request_gpio(ts_gpio) < 0) {
  95                 printk(KERN_ERR "can't get ads746 pen down GPIO\n");
  96                 return;
  97         }
  98
  99         omap_set_gpio_direction(ts_gpio, 1);
 100
 101         omap_set_gpio_debounce(ts_gpio, 1);
 102         omap_set_gpio_debounce_time(ts_gpio, 0xa);
 103 }
 104
 105 static int ads7846_get_pendown_state(void)
 106 {
 107         return !omap_get_gpio_datain(ts_gpio);
 108 }
 109
 110 /*
 111  * This enable(1)/disable(0) the voltage for TS: uses twl4030 calls
 112  */
 113 static int ads7846_vaux_control(int vaux_cntrl)
 114 {
 115         int ret = 0;
 116
 117 #ifdef CONFIG_TWL4030_CORE
 118         /* check for return value of ldo_use: if success it returns 0 */
 119         if (vaux_cntrl == VAUX_ENABLE) {
 120                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 121                         ENABLE_VAUX1_DEDICATED, TWL4030_VAUX1_DEDICATED))
 122                         return -EIO;
 123                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 124                         ENABLE_VAUX1_DEV_GRP, TWL4030_VAUX1_DEV_GRP))
 125                         return -EIO;
 126         } else if (vaux_cntrl == VAUX_DISABLE) {
 127                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 128                         0x00, TWL4030_VAUX1_DEDICATED))
 129                         return -EIO;
 130                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 131                         0x00, TWL4030_VAUX1_DEV_GRP))
 132                         return -EIO;
 133         }
 134 #else
 135         ret = -EIO;
 136 #endif
 137         return ret;
 138 }
 139
 140 static struct ads7846_platform_data tsc2046_config __initdata = {
 141         .get_pendown_state      = ads7846_get_pendown_state,
 142         .keep_vref_on           = 1,
 143         .vaux_control           = ads7846_vaux_control,
 144 };
 145
 146
 147 static struct omap2_mcspi_device_config tsc2046_mcspi_config = {
 148         .turbo_mode     = 0,
 149         .single_channel = 1,  /* 0: slave, 1: master */
 150 };
 151
 152 static struct spi_board_info ldp_spi_board_info[] __initdata = {
 153         [0] = {
 154                 /*
 155                  * TSC2046 operates at a max freqency of 2MHz, so
 156                  * operate slightly below at 1.5MHz
 157                  */
 158                 .modalias               = "ads7846",
 159                 .bus_num                = 1,
 160                 .chip_select            = 0,
 161                 .max_speed_hz           = 1500000,
 162                 .controller_data        = &tsc2046_mcspi_config,
 163                 .irq                    = 0,
 164                 .platform_data          = &tsc2046_config,
 165         },
 166 };
 167
 168 static struct platform_device *ldp_devices[] __initdata = {
 169 };
 170
 171 static void __init omap_ldp_init_irq(void)
 172 {
 173         omap2_init_common_hw(NULL);
 174         omap_init_irq();
 175         omap_gpio_init();
 176 }
 177
 178 static struct omap_uart_config ldp_uart_config __initdata = {
 179         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 180 };
 181
 182 static struct omap_board_config_kernel ldp_config[] __initdata = {
 183         { OMAP_TAG_UART,        &ldp_uart_config },
 184 };
 185
 186 static struct twl4030_usb_data ldp_usb_data = {
 187         .usb_mode       = T2_USB_MODE_ULPI,
 188 };
 189
 190 static struct twl4030_gpio_platform_data ldp_gpio_data = {
 191         .gpio_base      = OMAP_MAX_GPIO_LINES,
 192         .irq_base       = TWL4030_GPIO_IRQ_BASE,
 193         .irq_end        = TWL4030_GPIO_IRQ_END,
 194 };
 195
 196 static struct twl4030_madc_platform_data ldp_madc_data = {
 197         .irq_line       = 1,
 198 };
 199
 200 static struct twl4030_platform_data ldp_twldata = {
 201         .irq_base       = TWL4030_IRQ_BASE,
 202         .irq_end        = TWL4030_IRQ_END,
 203
 204         /* platform_data for children goes here */
 205         .madc           = &ldp_madc_data,
 206         .usb            = &ldp_usb_data,
 207         .gpio           = &ldp_gpio_data,
 208 };
 209
 210 static struct i2c_board_info __initdata ldp_i2c_boardinfo[] = {
 211         {
 212                 I2C_BOARD_INFO("twl4030", 0x48),
 213                 .flags = I2C_CLIENT_WAKE,
 214                 .irq = INT_34XX_SYS_NIRQ,
 215                 .platform_data = &ldp_twldata,
 216         },
 217 };
 218
 219 static int __init omap_i2c_init(void)
 220 {
 221         omap_register_i2c_bus(1, 2600, ldp_i2c_boardinfo,
 222                         ARRAY_SIZE(ldp_i2c_boardinfo));
 223         omap_register_i2c_bus(2, 400, NULL, 0);
 224         omap_register_i2c_bus(3, 400, NULL, 0);
 225         return 0;
 226 }
 227
 228 static void __init omap_ldp_init(void)
 229 {
 230         omap_i2c_init();
 231         platform_add_devices(ldp_devices, ARRAY_SIZE(ldp_devices));
 232         omap_board_config = ldp_config;
 233         omap_board_config_size = ARRAY_SIZE(ldp_config);
 234         ts_gpio = 54;
 235         ldp_spi_board_info[0].irq = OMAP_GPIO_IRQ(ts_gpio);
 236         spi_register_board_info(ldp_spi_board_info,
 237                                 ARRAY_SIZE(ldp_spi_board_info));
 238         msecure_init();
 239         ads7846_dev_init();
 240         twl4030_bci_battery_init();
 241         omap_serial_init();
 242         usb_musb_init();
 243         hsmmc_init();
 244 }
 245
 246 static void __init omap_ldp_map_io(void)
 247 {
 248         omap2_set_globals_343x();
 249         omap2_map_common_io();
 250 }
 251
 252 MACHINE_START(OMAP_LDP, "OMAP LDP board")
 253         .phys_io        = 0x48000000,
 254         .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
 255         .boot_params    = 0x80000100,
 256         .map_io         = omap_ldp_map_io,
 257         .init_irq       = omap_ldp_init_irq,
 258         .init_machine   = omap_ldp_init,
 259         .timer          = &omap_timer,
 260 MACHINE_END