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linux/arch/arm/mach-omap2/board-n8x0.c
Tony Lindgren ef70b0bdea bus: ti-sysc: Add support for platform data callbacks 
We want to pass the device tree configuration for interconnect target
modules from ti-sysc driver to the existing platform hwmod code.

This allows us to first validate the dts data against the existing
platform data before we start dropping the platform data in favor of
device tree data.

To do this, let's add platform data callbacks for PM runtime functions
to call for the interconnect target modules if platform data is
available.

Note that as ti-sysc driver can rebind, omap_auxdata_lookup and related
functions can no longer be __init.

Signed-off-by: Tony Lindgren <tony@atomide.com>
2018-02-26 14:16:11 -08:00

600 lines
13 KiB
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/*
* 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_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 IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
/*
* 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 const char announce[] __initconst = 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) && IS_ENABLED(CONFIG_MMC_OMAP)
/*
* 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 = {
.late_init = n8x0_menelaus_late_init,
};
struct aic3x_pdata n810_aic33_data = {
.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;
}
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