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>
@@ -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")