- 根目录:
- arch
- arm
- mach-omap2
- board-n8x0.c
/*
* linux/arch/arm/mach-omap2/board-n8x0.c
*
* Copyright (C) 2005-2009 Nokia Corporation
* Author: Juha Yrjola <juha.yrjola@nokia.com>
*
* Modified from mach-omap2/board-generic.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/stddef.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/usb/musb.h>
#include <linux/mmc/host.h>
#include <linux/platform_data/spi-omap2-mcspi.h>
#include <linux/platform_data/mmc-omap.h>
#include <linux/mfd/menelaus.h>
#include <sound/tlv320aic3x.h>
#include <asm/mach/arch.h>
#include <asm/mach-types.h>
#include "common.h"
#include "mmc.h"
#include "soc.h"
#include "common-board-devices.h"
#define TUSB6010_ASYNC_CS 1
#define TUSB6010_SYNC_CS 4
#define TUSB6010_GPIO_INT 58
#define TUSB6010_GPIO_ENABLE 0
#define TUSB6010_DMACHAN 0x3f
#define NOKIA_N810_WIMAX (1 << 2)
#define NOKIA_N810 (1 << 1)
#define NOKIA_N800 (1 << 0)
static u32 board_caps;
#define board_is_n800() (board_caps & NOKIA_N800)
#define board_is_n810() (board_caps & NOKIA_N810)
#define board_is_n810_wimax() (board_caps & NOKIA_N810_WIMAX)
static void board_check_revision(void)
{
if (of_have_populated_dt()) {
if (of_machine_is_compatible("nokia,n800"))
board_caps = NOKIA_N800;
else if (of_machine_is_compatible("nokia,n810"))
board_caps = NOKIA_N810;
else if (of_machine_is_compatible("nokia,n810-wimax"))
board_caps = NOKIA_N810_WIMAX;
}
if (!board_caps)
pr_err("Unknown board\n");
}
#if defined(CONFIG_USB_MUSB_TUSB6010) || defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
/*
* Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
* 1.5 V voltage regulators of PM companion chip. Companion chip will then
* provide then PGOOD signal to TUSB6010 which will release it from reset.
*/
static int tusb_set_power(int state)
{
int i, retval = 0;
if (state) {
gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
msleep(1);
/* Wait until TUSB6010 pulls INT pin down */
i = 100;
while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
msleep(1);
i--;
}
if (!i) {
printk(KERN_ERR "tusb: powerup failed\n");
retval = -ENODEV;
}
} else {
gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
msleep(10);
}
return retval;
}
static struct musb_hdrc_config musb_config = {
.multipoint = 1,
.dyn_fifo = 1,
.num_eps = 16,
.ram_bits = 12,
};
static struct musb_hdrc_platform_data tusb_data = {
.mode = MUSB_OTG,
.set_power = tusb_set_power,
.min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
.power = 100, /* Max 100 mA VBUS for host mode */
.config = &musb_config,
};
static void __init n8x0_usb_init(void)
{
int ret = 0;
static char announce[] __initdata = KERN_INFO "TUSB 6010\n";
/* PM companion chip power control pin */
ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
"TUSB6010 enable");
if (ret != 0) {
printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
TUSB6010_GPIO_ENABLE);
return;
}
tusb_set_power(0);
ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
if (ret != 0)
goto err;
printk(announce);
return;
err:
gpio_free(TUSB6010_GPIO_ENABLE);
}
#else
static void __init n8x0_usb_init(void) {}
#endif /*CONFIG_USB_MUSB_TUSB6010 */
static struct omap2_mcspi_device_config p54spi_mcspi_config = {
.turbo_mode = 0,
};
static struct spi_board_info n800_spi_board_info[] __initdata = {
{
.modalias = "p54spi",
.bus_num = 2,
.chip_select = 0,
.max_speed_hz = 48000000,
.controller_data = &p54spi_mcspi_config,
},
};
#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 N810_EMMC_VIO_GPIO 9
static int slot1_cover_open;
static int slot2_cover_open;
static struct device *mmc_device;
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(N810_EMMC_VIO_GPIO, 1);
msleep(1);
} else {
gpio_set_value(N810_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 (board_is_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 (board_is_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;
#ifdef CONFIG_MMC_OMAP
omap_mmc_notify_cover_event(mmc_device, index, *openp);
#else
pr_warn("MMC: notify cover event not available\n");
#endif
}
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 (board_is_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 (board_is_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 (board_is_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 (board_is_n810()) {
gpio_free(N810_EMMC_VSD_GPIO);
gpio_free(N810_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 = 0,
.switch_slot = n8x0_mmc_switch_slot,
.init = n8x0_mmc_late_init,
.cleanup = n8x0_mmc_cleanup,
.shutdown = n8x0_mmc_shutdown,
.max_freq = 24000000,
.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];
static struct gpio n810_emmc_gpios[] __initdata = {
{ N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vddf" },
{ N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vdd" },
};
static void __init n8x0_mmc_init(void)
{
int err;
if (board_is_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_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
"MMC slot switch");
if (err)
return;
if (board_is_n810()) {
err = gpio_request_array(n810_emmc_gpios,
ARRAY_SIZE(n810_emmc_gpios));
if (err) {
gpio_free(N8X0_SLOT_SWITCH_GPIO);
return;
}
}
mmc1_data.nr_slots = 2;
mmc_data[0] = &mmc1_data;
}
#else
static struct omap_mmc_platform_data mmc1_data;
void __init n8x0_mmc_init(void)
{
}
#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) {
pr_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) {
pr_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;
}
#else
static int n8x0_menelaus_late_init(struct device *dev)
{
return 0;
}
#endif
struct menelaus_platform_data n8x0_menelaus_platform_data __initdata = {
.late_init = n8x0_menelaus_late_init,
};
struct aic3x_pdata n810_aic33_data __initdata = {
.gpio_reset = 118,
};
static int __init n8x0_late_initcall(void)
{
if (!board_caps)
return -ENODEV;
n8x0_mmc_init();
n8x0_usb_init();
return 0;
}
omap_late_initcall(n8x0_late_initcall);
/*
* Legacy init pdata init for n8x0. Note that we want to follow the
* I2C bus numbering starting at 0 for device tree like other omaps.
*/
void * __init n8x0_legacy_init(void)
{
board_check_revision();
spi_register_board_info(n800_spi_board_info,
ARRAY_SIZE(n800_spi_board_info));
return &mmc1_data;
}