diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/board-n8x0.c | 445 |
1 files changed, 445 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/board-n8x0.c b/arch/arm/mach-omap2/board-n8x0.c index 9de03f8e2e68..4cab0522d7ce 100644 --- a/arch/arm/mach-omap2/board-n8x0.c +++ b/arch/arm/mach-omap2/board-n8x0.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/stddef.h> +#include <linux/i2c.h> #include <linux/spi/spi.h> #include <linux/usb/musb.h> @@ -25,11 +26,17 @@ #include <plat/board.h> #include <plat/common.h> +#include <plat/menelaus.h> #include <mach/irqs.h> #include <plat/mcspi.h> #include <plat/onenand.h> +#include <plat/mmc.h> #include <plat/serial.h> +static int slot1_cover_open; +static int slot2_cover_open; +static struct device *mmc_device; + static struct omap2_mcspi_device_config p54spi_mcspi_config = { .turbo_mode = 0, .single_channel = 1, @@ -96,6 +103,442 @@ static void __init n8x0_onenand_init(void) {} #endif +#if defined(CONFIG_MENELAUS) && \ + (defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)) + +/* + * On both N800 and N810, only the first of the two MMC controllers is in use. + * The two MMC slots are multiplexed via Menelaus companion chip over I2C. + * On N800, both slots are powered via Menelaus. On N810, only one of the + * slots is powered via Menelaus. The N810 EMMC is powered via GPIO. + * + * VMMC slot 1 on both N800 and N810 + * VDCDC3_APE and VMCS2_APE slot 2 on N800 + * GPIO23 and GPIO9 slot 2 EMMC on N810 + * + */ +#define N8X0_SLOT_SWITCH_GPIO 96 +#define N810_EMMC_VSD_GPIO 23 +#define NN810_EMMC_VIO_GPIO 9 + +static int n8x0_mmc_switch_slot(struct device *dev, int slot) +{ +#ifdef CONFIG_MMC_DEBUG + dev_dbg(dev, "Choose slot %d\n", slot + 1); +#endif + gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot); + return 0; +} + +static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot, + int power_on, int vdd) +{ + int mV; + +#ifdef CONFIG_MMC_DEBUG + dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1, + power_on ? "on" : "off", vdd); +#endif + if (slot == 0) { + if (!power_on) + return menelaus_set_vmmc(0); + switch (1 << vdd) { + case MMC_VDD_33_34: + case MMC_VDD_32_33: + case MMC_VDD_31_32: + mV = 3100; + break; + case MMC_VDD_30_31: + mV = 3000; + break; + case MMC_VDD_28_29: + mV = 2800; + break; + case MMC_VDD_165_195: + mV = 1850; + break; + default: + BUG(); + } + return menelaus_set_vmmc(mV); + } else { + if (!power_on) + return menelaus_set_vdcdc(3, 0); + switch (1 << vdd) { + case MMC_VDD_33_34: + case MMC_VDD_32_33: + mV = 3300; + break; + case MMC_VDD_30_31: + case MMC_VDD_29_30: + mV = 3000; + break; + case MMC_VDD_28_29: + case MMC_VDD_27_28: + mV = 2800; + break; + case MMC_VDD_24_25: + case MMC_VDD_23_24: + mV = 2400; + break; + case MMC_VDD_22_23: + case MMC_VDD_21_22: + mV = 2200; + break; + case MMC_VDD_20_21: + mV = 2000; + break; + case MMC_VDD_165_195: + mV = 1800; + break; + default: + BUG(); + } + return menelaus_set_vdcdc(3, mV); + } + return 0; +} + +static void n810_set_power_emmc(struct device *dev, + int power_on) +{ + dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off"); + + if (power_on) { + gpio_set_value(N810_EMMC_VSD_GPIO, 1); + msleep(1); + gpio_set_value(NN810_EMMC_VIO_GPIO, 1); + msleep(1); + } else { + gpio_set_value(NN810_EMMC_VIO_GPIO, 0); + msleep(50); + gpio_set_value(N810_EMMC_VSD_GPIO, 0); + msleep(50); + } +} + +static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on, + int vdd) +{ + if (machine_is_nokia_n800() || slot == 0) + return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd); + + n810_set_power_emmc(dev, power_on); + + return 0; +} + +static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode) +{ + int r; + + dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1, + bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull"); + BUG_ON(slot != 0 && slot != 1); + slot++; + switch (bus_mode) { + case MMC_BUSMODE_OPENDRAIN: + r = menelaus_set_mmc_opendrain(slot, 1); + break; + case MMC_BUSMODE_PUSHPULL: + r = menelaus_set_mmc_opendrain(slot, 0); + break; + default: + BUG(); + } + if (r != 0 && printk_ratelimit()) + dev_err(dev, "MMC: unable to set bus mode for slot %d\n", + slot); + return r; +} + +static int n8x0_mmc_get_cover_state(struct device *dev, int slot) +{ + slot++; + BUG_ON(slot != 1 && slot != 2); + if (slot == 1) + return slot1_cover_open; + else + return slot2_cover_open; +} + +static void n8x0_mmc_callback(void *data, u8 card_mask) +{ + int bit, *openp, index; + + if (machine_is_nokia_n800()) { + bit = 1 << 1; + openp = &slot2_cover_open; + index = 1; + } else { + bit = 1; + openp = &slot1_cover_open; + index = 0; + } + + if (card_mask & bit) + *openp = 1; + else + *openp = 0; + + omap_mmc_notify_cover_event(mmc_device, index, *openp); +} + +void n8x0_mmc_slot1_cover_handler(void *arg, int closed_state) +{ + if (mmc_device == NULL) + return; + + slot1_cover_open = !closed_state; + omap_mmc_notify_cover_event(mmc_device, 0, closed_state); +} + +static int n8x0_mmc_late_init(struct device *dev) +{ + int r, bit, *openp; + int vs2sel; + + mmc_device = dev; + + r = menelaus_set_slot_sel(1); + if (r < 0) + return r; + + if (machine_is_nokia_n800()) + vs2sel = 0; + else + vs2sel = 2; + + r = menelaus_set_mmc_slot(2, 0, vs2sel, 1); + if (r < 0) + return r; + + n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */ + n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16); + + r = menelaus_set_mmc_slot(1, 1, 0, 1); + if (r < 0) + return r; + r = menelaus_set_mmc_slot(2, 1, vs2sel, 1); + if (r < 0) + return r; + + r = menelaus_get_slot_pin_states(); + if (r < 0) + return r; + + if (machine_is_nokia_n800()) { + bit = 1 << 1; + openp = &slot2_cover_open; + } else { + bit = 1; + openp = &slot1_cover_open; + slot2_cover_open = 0; + } + + /* All slot pin bits seem to be inversed until first switch change */ + if (r == 0xf || r == (0xf & ~bit)) + r = ~r; + + if (r & bit) + *openp = 1; + else + *openp = 0; + + r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL); + + return r; +} + +static void n8x0_mmc_shutdown(struct device *dev) +{ + int vs2sel; + + if (machine_is_nokia_n800()) + vs2sel = 0; + else + vs2sel = 2; + + menelaus_set_mmc_slot(1, 0, 0, 0); + menelaus_set_mmc_slot(2, 0, vs2sel, 0); +} + +static void n8x0_mmc_cleanup(struct device *dev) +{ + menelaus_unregister_mmc_callback(); + + gpio_free(N8X0_SLOT_SWITCH_GPIO); + + if (machine_is_nokia_n810()) { + gpio_free(N810_EMMC_VSD_GPIO); + gpio_free(NN810_EMMC_VIO_GPIO); + } +} + +/* + * MMC controller1 has two slots that are multiplexed via I2C. + * MMC controller2 is not in use. + */ +static struct omap_mmc_platform_data mmc1_data = { + .nr_slots = 2, + .switch_slot = n8x0_mmc_switch_slot, + .init = n8x0_mmc_late_init, + .cleanup = n8x0_mmc_cleanup, + .shutdown = n8x0_mmc_shutdown, + .max_freq = 24000000, + .dma_mask = 0xffffffff, + .slots[0] = { + .wires = 4, + .set_power = n8x0_mmc_set_power, + .set_bus_mode = n8x0_mmc_set_bus_mode, + .get_cover_state = n8x0_mmc_get_cover_state, + .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 | + MMC_VDD_32_33 | MMC_VDD_33_34, + .name = "internal", + }, + .slots[1] = { + .set_power = n8x0_mmc_set_power, + .set_bus_mode = n8x0_mmc_set_bus_mode, + .get_cover_state = n8x0_mmc_get_cover_state, + .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 | + MMC_VDD_21_22 | MMC_VDD_22_23 | + MMC_VDD_23_24 | MMC_VDD_24_25 | + MMC_VDD_27_28 | MMC_VDD_28_29 | + MMC_VDD_29_30 | MMC_VDD_30_31 | + MMC_VDD_32_33 | MMC_VDD_33_34, + .name = "external", + }, +}; + +static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC]; + +void __init n8x0_mmc_init(void) + +{ + int err; + + if (machine_is_nokia_n810()) { + mmc1_data.slots[0].name = "external"; + + /* + * Some Samsung Movinand chips do not like open-ended + * multi-block reads and fall to braind-dead state + * while doing so. Reducing the number of blocks in + * the transfer or delays in clock disable do not help + */ + mmc1_data.slots[1].name = "internal"; + mmc1_data.slots[1].ban_openended = 1; + } + + err = gpio_request(N8X0_SLOT_SWITCH_GPIO, "MMC slot switch"); + if (err) + return err; + + gpio_direction_output(N8X0_SLOT_SWITCH_GPIO, 0); + + if (machine_is_nokia_n810()) { + err = gpio_request(N810_EMMC_VSD_GPIO, "MMC slot 2 Vddf"); + if (err) { + gpio_free(N8X0_SLOT_SWITCH_GPIO); + return err; + } + gpio_direction_output(N810_EMMC_VSD_GPIO, 0); + + err = gpio_request(NN810_EMMC_VIO_GPIO, "MMC slot 2 Vdd"); + if (err) { + gpio_free(N8X0_SLOT_SWITCH_GPIO); + gpio_free(N810_EMMC_VSD_GPIO); + return err; + } + gpio_direction_output(NN810_EMMC_VIO_GPIO, 0); + } + + mmc_data[0] = &mmc1_data; + omap2_init_mmc(mmc_data, OMAP24XX_NR_MMC); +} +#else + +void __init n8x0_mmc_init(void) +{ +} + +void n8x0_mmc_slot1_cover_handler(void *arg, int state) +{ +} + +#endif /* CONFIG_MMC_OMAP */ + +#ifdef CONFIG_MENELAUS + +static int n8x0_auto_sleep_regulators(void) +{ + u32 val; + int ret; + + val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \ + | EN_VAUX_SLEEP | EN_VIO_SLEEP \ + | EN_VMEM_SLEEP | EN_DC3_SLEEP \ + | EN_VC_SLEEP | EN_DC2_SLEEP; + + ret = menelaus_set_regulator_sleep(1, val); + if (ret < 0) { + printk(KERN_ERR "Could not set regulators to sleep on " + "menelaus: %u\n", ret); + return ret; + } + return 0; +} + +static int n8x0_auto_voltage_scale(void) +{ + int ret; + + ret = menelaus_set_vcore_hw(1400, 1050); + if (ret < 0) { + printk(KERN_ERR "Could not set VCORE voltage on " + "menelaus: %u\n", ret); + return ret; + } + return 0; +} + +static int n8x0_menelaus_late_init(struct device *dev) +{ + int ret; + + ret = n8x0_auto_voltage_scale(); + if (ret < 0) + return ret; + ret = n8x0_auto_sleep_regulators(); + if (ret < 0) + return ret; + return 0; +} + +static struct i2c_board_info __initdata n8x0_i2c_board_info_1[] = { + { + I2C_BOARD_INFO("menelaus", 0x72), + .irq = INT_24XX_SYS_NIRQ, + }, +}; + +static struct menelaus_platform_data n8x0_menelaus_platform_data = { + .late_init = n8x0_menelaus_late_init, +}; + +static void __init n8x0_menelaus_init(void) +{ + n8x0_i2c_board_info_1[0].platform_data = &n8x0_menelaus_platform_data; + omap_register_i2c_bus(1, 400, n8x0_i2c_board_info_1, + ARRAY_SIZE(n8x0_i2c_board_info_1)); +} + +#else +static inline void __init n8x0_menelaus_init(void) +{ +} +#endif + static void __init n8x0_map_io(void) { omap2_set_globals_242x(); @@ -116,7 +559,9 @@ static void __init n8x0_init_machine(void) ARRAY_SIZE(n800_spi_board_info)); omap_serial_init(); + n8x0_menelaus_init(); n8x0_onenand_init(); + n8x0_mmc_init(); } MACHINE_START(NOKIA_N800, "Nokia N800") |