[PATCH 7/6] omap2: Initialize Menelaus and MMC for N8X0

[Tony Lindgren <tony@atomide.com>]

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Here's one more to initialize the MMC on N8X0. That's handy
for boot testing the multi-omap kernels on 24xx.

For some reason only one of the MMC slots seems to work
on both N800 and N810 for some reason. No idea why, the
Menelaus slot switching seems to be all there.

Regards,

Tony

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From: Tony Lindgren <tony@atomide.com>
Date: Fri, 26 Feb 2010 15:31:12 -0800
Subject: [PATCH] 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>

diff --git a/arch/arm/mach-omap2/board-n8x0.c b/arch/arm/mach-omap2/board-n8x0.c
index 9de03f8..4cab052 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")