diff options
Diffstat (limited to 'arch/arm/mach-ux500/board-mop500-stm.c')
| -rw-r--r-- | arch/arm/mach-ux500/board-mop500-stm.c | 277 |
1 files changed, 264 insertions, 13 deletions
diff --git a/arch/arm/mach-ux500/board-mop500-stm.c b/arch/arm/mach-ux500/board-mop500-stm.c index 20d3f9a546b..d38595b11b2 100644 --- a/arch/arm/mach-ux500/board-mop500-stm.c +++ b/arch/arm/mach-ux500/board-mop500-stm.c @@ -13,13 +13,27 @@ #include <linux/platform_device.h> #include <linux/gpio.h> #include <linux/gpio/nomadik.h> +#include <linux/mfd/dbx500-prcmu.h> +#include <linux/regulator/consumer.h> + +#include <asm/mach-types.h> #include <plat/pincfg.h> #include <mach/devices.h> -#include <linux/mfd/dbx500-prcmu.h> #include <asm/io.h> #include <trace/stm.h> #include "pins-db8500.h" +#define HREFV60_SDMMC_EN_GPIO 169 +#define HREFV60_SDMMC_1V8_3V_GPIO 5 + +#define STM_DEVICE (&u8500_stm_device.dev) +#define STM_ERR(msg) dev_err(STM_DEVICE, msg) +#define STM_WARN(msg) dev_warn(STM_DEVICE, msg) + +static struct regulator *regulator_aux3; +static enum stm_connection_type + stm_current_connection = STM_STE_INVALID_CONNECTION; + static pin_cfg_t mop500_stm_mipi34_pins[] = { GPIO70_STMAPE_CLK | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, GPIO71_STMAPE_DAT3 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, @@ -40,6 +54,15 @@ static pin_cfg_t mop500_stm_mipi60_pins[] = { GPIO159_STMAPE_DAT0, }; +static pin_cfg_t mop500_stm_ape_microsd_pins[] = { + GPIO23_MS_CLK | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO24_MS_BS | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO25_MS_DAT0 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO26_MS_DAT1 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO27_MS_DAT2 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO28_MS_DAT3 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, +}; + static pin_cfg_t mop500_ske_pins[] = { GPIO153_KP_I7 | PIN_INPUT_PULLDOWN | PIN_SLPM_INPUT_PULLUP, GPIO154_KP_I6 | PIN_INPUT_PULLDOWN | PIN_SLPM_INPUT_PULLUP, @@ -59,35 +82,211 @@ static pin_cfg_t mop500_ske_pins[] = { GPIO168_KP_O0 | PIN_INPUT_PULLUP | PIN_SLPM_OUTPUT_LOW, }; +static pin_cfg_t mop500_stm_modem_microsd_pins[] = { + GPIO18_GPIO | PIN_OUTPUT_LOW, + GPIO19_GPIO | PIN_OUTPUT_HIGH, + GPIO20_GPIO | PIN_OUTPUT_HIGH, + GPIO22_GPIO | PIN_INPUT_PULLUP, + GPIO23_STMMOD_CLK | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO24_UARTMOD_RXD | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO25_STMMOD_DAT0 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO26_STMMOD_DAT1 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO27_STMMOD_DAT2 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, + GPIO28_STMMOD_DAT3 | PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP, +}; + +/* sdi0 (removable MMC/SD/SDIO cards) */ +static pin_cfg_t mop500_sdi0_pins[] = { + GPIO18_MC0_CMDDIR | PIN_OUTPUT_HIGH, + GPIO19_MC0_DAT0DIR | PIN_OUTPUT_HIGH, + GPIO20_MC0_DAT2DIR | PIN_OUTPUT_HIGH, + + GPIO22_MC0_FBCLK | PIN_INPUT_NOPULL, + GPIO23_MC0_CLK | PIN_OUTPUT_LOW, + GPIO24_MC0_CMD | PIN_INPUT_PULLUP, + GPIO25_MC0_DAT0 | PIN_INPUT_PULLUP, + GPIO26_MC0_DAT1 | PIN_INPUT_PULLUP, + GPIO27_MC0_DAT2 | PIN_INPUT_PULLUP, + GPIO28_MC0_DAT3 | PIN_INPUT_PULLUP, +}; + static int stm_ste_disable_ape_on_mipi60(void) { int retval; retval = nmk_config_pins_sleep(ARRAY_AND_SIZE(mop500_stm_mipi60_pins)); if (retval) - pr_err("STM: Failed to disable MIPI60\n"); + STM_ERR("Failed to disable MIPI60\n"); else { retval = nmk_config_pins(ARRAY_AND_SIZE(mop500_ske_pins)); if (retval) - pr_err("STM: Failed to enable SKE gpio\n"); + STM_ERR("Failed to enable SKE gpio\n"); } return retval; } -/* - * Manage STM output pins connection (MIP34/MIPI60 connectors) - */ +static int stm_enable_ape_microsd(void) +{ + int retval; + + /* + * Configure STM APE on GPIO23,GPIO28,GPIO27,GPIO26,GPIO25 + * On HREF board an external SD buffer exist (ST6G3244ME) + * to perform level conversion from 1.8v to 3.3V on SD card signals + * When STM is redirected on micro SD connector GPIO18,GP19,GPIO20 + * are configured in standard GPIO mode and are used to configure + * direction on external SD buffer ST6G3244ME. + */ + + retval = nmk_config_pins(ARRAY_AND_SIZE(mop500_stm_ape_microsd_pins)); + if (retval) + STM_ERR("Failed to enable STM APE on MICRO SD\n"); + + /* Enable altC1 on GPIO23-28 (STMAPE) */ + prcmu_enable_stm_ape(); + + return retval; +} + +static int stm_disable_ape_microsd(void) +{ + int retval; + + /* Disable altC1 on GPIO23-28 (STMAPE) */ + prcmu_disable_stm_ape(); + + /* Reconfigure GPIO for SD */ + retval = nmk_config_pins_sleep(ARRAY_AND_SIZE(mop500_sdi0_pins)); + if (retval) + STM_ERR("Failed to disable STM APE on MICRO SD " + "and to reconfigure GPIO for SD\n"); + + return retval; +} + +static int stm_enable_modem_microsd(void) +{ + int retval; + + /* + * Configure STM APE on GPIO23,GPIO28,GPIO27,GPIO26,GPIO25 + * On HREF board an external SD buffer exist (ST6G3244ME) + * to perform level conversion from 1.8v to 3.3V on SD card + * signals. When STM is redirected on micro SD connector + * GPIO18,GP19,GPIO20 are configured in standard GPIO mode + * and are used to configure direction on external SD buffer + * ST6G3244ME. + */ + + retval = nmk_config_pins(ARRAY_AND_SIZE(mop500_stm_modem_microsd_pins)); + if (retval) + STM_ERR("Failed to enable STM MODEM on MICRO SD\n"); + + return retval; +} + +static int stm_disable_modem_microsd(void) +{ + int retval; + + /* Reconfigure GPIO for SD */ + retval = nmk_config_pins_sleep(ARRAY_AND_SIZE(mop500_sdi0_pins)); + if (retval) + STM_ERR("Failed to disable STM MODEM on MICRO SD " + "and to reconfigure GPIO for SD\n"); + + return retval; +} + +/* Enable or disable micro sd card buffers on HREF */ +static void control_level_shifter_for_microsd(int gpio_dir) +{ + int gpio[2]; + + if (machine_is_hrefv60()) { + gpio[0] = HREFV60_SDMMC_EN_GPIO; + gpio[1] = HREFV60_SDMMC_1V8_3V_GPIO; + } else { + gpio[0] = MOP500_EGPIO(17); + gpio[1] = MOP500_EGPIO(18); + } + + /* Select the default 2.9V and enable / disable level shifter */ + gpio_direction_output(gpio[1], 0); + gpio_direction_output(gpio[0], gpio_dir); +} + +/* Enable micro sd card buffers on HREF */ +static int enable_level_shifter_for_microsd(void) +{ + control_level_shifter_for_microsd(1); + STM_WARN("Level Shifter for SD card connector on.\n"); + return 0; +} + +/* Disable micro sd card buffers on HREF */ +static int disable_level_shifter_for_microsd(void) +{ + control_level_shifter_for_microsd(0); + STM_WARN("Level Shifter for SD card connector off.\n"); + return 0; +} + +/* Enable VAUX3 to power on buffer on STM MICRO SD cable */ +static int enable_vaux3_for_microsd_cable(void) +{ + int error; + + regulator_aux3 = regulator_get(&u8500_stm_device.dev, "v-SD-STM"); + + if (IS_ERR(regulator_aux3)) { + error = PTR_ERR(regulator_aux3); + STM_ERR("Failed to get regulator, supply: v-SD-STM\n"); + return error; + } + + error = regulator_enable(regulator_aux3); + + if (error) { + STM_ERR("Unable to enable regulator on SD card connector\n"); + return error; + } + + STM_WARN("Regulator on SD card connector power on.\n"); + return error; +} + +/* Disable VAUX3 to power off buffer on STM MICRO SD cable */ +static int disable_vaux3_for_microsd_cable(void) +{ + int error = 0; + + error = regulator_disable(regulator_aux3); + + if (regulator_aux3) + regulator_put(regulator_aux3); + + STM_WARN("Regulator for stm on SD card connector power off.\n"); + + return error; + +} + static int stm_ste_connection(enum stm_connection_type con_type) { int retval = -EINVAL; + /* Check if connection type has been changed */ + if (con_type == stm_current_connection) + return 0; + if (con_type != STM_DISCONNECT) { /* Always enable MIPI34 GPIO pins */ retval = nmk_config_pins( ARRAY_AND_SIZE(mop500_stm_mipi34_pins)); if (retval) { - pr_err("STM: Failed to enable MIPI34\n"); - return retval; + STM_ERR("Failed to enable MIPI34\n"); + goto stm_ste_connection_error; } } @@ -111,12 +310,40 @@ static int stm_ste_connection(enum stm_connection_type con_type) /* Enable APE on MIPI60 */ retval = nmk_config_pins_sleep(ARRAY_AND_SIZE(mop500_ske_pins)); if (retval) - pr_err("STM: Failed to disable SKE GPIO\n"); + STM_ERR("Failed to disable SKE GPIO\n"); else { retval = nmk_config_pins( ARRAY_AND_SIZE(mop500_stm_mipi60_pins)); if (retval) - pr_err("STM: Failed to enable MIPI60\n"); + STM_ERR("Failed to enable MIPI60\n"); + } + break; + + case STM_STE_MODEM_ON_MICROSD: + /* Disable APE on micro SD */ + retval = stm_disable_ape_microsd(); + /* Enable modem on micro SD */ + if (!retval) + retval = stm_enable_modem_microsd(); + /* Enable SD card buffer and regulator on href */ + if (!retval && (stm_current_connection + != STM_STE_APE_ON_MICROSD)) { + enable_level_shifter_for_microsd(); + enable_vaux3_for_microsd_cable(); + } + break; + + case STM_STE_APE_ON_MICROSD: + /* Disable modem on micro SD */ + retval = stm_disable_modem_microsd(); + /* Enable ape on micro SD */ + if (!retval) + retval = stm_enable_ape_microsd(); + /* Enable SD card buffer and regulator on href */ + if (!retval && (stm_current_connection + != STM_STE_MODEM_ON_MICROSD)) { + enable_level_shifter_for_microsd(); + enable_vaux3_for_microsd_cable(); } break; @@ -124,15 +351,39 @@ static int stm_ste_connection(enum stm_connection_type con_type) retval = nmk_config_pins_sleep( ARRAY_AND_SIZE(mop500_stm_mipi34_pins)); if (retval) - pr_err("STM: Failed to disable MIPI34\n"); + STM_ERR("Failed to disable MIPI34\n"); retval = stm_ste_disable_ape_on_mipi60(); + if (retval) + STM_ERR("Failed to disable MIPI60\n"); + + retval = stm_disable_modem_microsd(); + if (retval) + STM_ERR("Failed to disable modem on microsd\n"); + + retval = stm_disable_ape_microsd(); + if (retval) + STM_ERR("Failed to disable ape on microsd\n"); break; default: - pr_err("STM: bad connection type\n"); - break; + STM_ERR("Bad connection type\n"); + goto stm_ste_connection_error; + } + + /* Disable power for microsd */ + if ((stm_current_connection == STM_STE_MODEM_ON_MICROSD) + || (stm_current_connection == STM_STE_APE_ON_MICROSD)) { + if ((con_type != STM_STE_MODEM_ON_MICROSD) + && (con_type != STM_STE_APE_ON_MICROSD)) { + disable_vaux3_for_microsd_cable(); + disable_level_shifter_for_microsd(); + } } + + stm_current_connection = con_type; + +stm_ste_connection_error: return retval; } |