omap2: Initialize Menelaus and MMC for N8X0

Initialize MMC for N8X0

Based on an earlier patches from Nokia released kernel
sources at:

http://repository.maemo.org/pool/os2008/free/source/k/kernel-source-rx-34/

Signed-off-by: Tony Lindgren <tony@atomide.com>

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")