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/*
* arch/arm/mach-tegra/board-whistler-baseband.c
*
* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <mach/tegra_usb_modem_power.h>
#include "board.h"
#include "board-whistler-baseband.h"
static struct gpio modem_gpios[] = {
{MODEM_PWR_ON, GPIOF_OUT_INIT_LOW, "MODEM PWR ON"},
{MODEM_RESET, GPIOF_IN, "MODEM RESET"},
{AP2MDM_ACK2, GPIOF_OUT_INIT_HIGH, "AP2MDM ACK2"},
{AP2MDM_ACK, GPIOF_OUT_INIT_LOW, "AP2MDM ACK"},
};
static __initdata struct tegra_pingroup_config whistler_null_ulpi_pinmux[] = {
{TEGRA_PINGROUP_UAA, TEGRA_MUX_ULPI, TEGRA_PUPD_NORMAL,
TEGRA_TRI_NORMAL},
{TEGRA_PINGROUP_UAB, TEGRA_MUX_ULPI, TEGRA_PUPD_NORMAL,
TEGRA_TRI_NORMAL},
{TEGRA_PINGROUP_UDA, TEGRA_MUX_ULPI, TEGRA_PUPD_NORMAL,
TEGRA_TRI_NORMAL},
{TEGRA_PINGROUP_UAC, TEGRA_MUX_RSVD4, TEGRA_PUPD_NORMAL,
TEGRA_TRI_NORMAL},
{TEGRA_PINGROUP_SDIO1, TEGRA_MUX_UARTA, TEGRA_PUPD_PULL_UP,
TEGRA_TRI_NORMAL},
};
static void baseband_post_phy_on(void);
static void baseband_pre_phy_off(void);
static struct tegra_usb_phy_platform_ops ulpi_null_plat_ops = {
.pre_phy_off = baseband_pre_phy_off,
.post_phy_on = baseband_post_phy_on,
};
static struct tegra_usb_platform_data tegra_ehci2_ulpi_null_pdata = {
.port_otg = false,
.has_hostpc = false,
.phy_intf = TEGRA_USB_PHY_INTF_ULPI_NULL,
.op_mode = TEGRA_USB_OPMODE_HOST,
.u_data.host = {
.vbus_gpio = -1,
.vbus_reg = NULL,
.hot_plug = false,
.remote_wakeup_supported = false,
.power_off_on_suspend = true,
},
.u_cfg.ulpi = {
.shadow_clk_delay = 10,
.clock_out_delay = 1,
.data_trimmer = 1,
.stpdirnxt_trimmer = 1,
.dir_trimmer = 1,
.clk = NULL,
.phy_restore_gpio = MDM2AP_ACK,
},
.ops = &ulpi_null_plat_ops,
};
static void baseband_post_phy_on(void)
{
/* set AP2MDM_ACK2 low */
gpio_set_value(AP2MDM_ACK2, 0);
}
static void baseband_pre_phy_off(void)
{
/* set AP2MDM_ACK2 high */
gpio_set_value(AP2MDM_ACK2, 1);
}
static void baseband_start(void)
{
/*
* Leave baseband powered OFF.
* User-space daemons will take care of powering it up.
*/
pr_info("%s\n", __func__);
gpio_set_value(MODEM_PWR_ON, 0);
}
static void baseband_reset(void)
{
/* Initiate power cycle on baseband sub system */
pr_info("%s\n", __func__);
gpio_set_value(MODEM_PWR_ON, 0);
mdelay(200);
gpio_set_value(MODEM_PWR_ON, 1);
}
static int baseband_init(void)
{
int ret;
ret = gpio_request_array(modem_gpios, ARRAY_SIZE(modem_gpios));
if (ret)
return ret;
/* enable pull-up for BB_RST_OUT */
tegra_pinmux_set_pullupdown(TEGRA_PINGROUP_UAC,
TEGRA_PUPD_PULL_UP);
/* export GPIO for user space access through sysfs */
gpio_export(MODEM_PWR_ON, false);
return 0;
}
static const struct tegra_modem_operations baseband_operations = {
.init = baseband_init,
.start = baseband_start,
.reset = baseband_reset,
};
static struct tegra_usb_modem_power_platform_data baseband_pdata = {
.ops = &baseband_operations,
.wake_gpio = MDM2AP_ACK2,
.wake_irq_flags = IRQF_TRIGGER_FALLING,
.boot_gpio = BB_RST_OUT,
.boot_irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
.autosuspend_delay = 2000,
.short_autosuspend_delay = 50,
.tegra_ehci_device = &tegra_ehci2_device,
.tegra_ehci_pdata = &tegra_ehci2_ulpi_null_pdata,
};
static struct platform_device icera_baseband_device = {
.name = "tegra_usb_modem_power",
.id = -1,
.dev = {
.platform_data = &baseband_pdata,
},
};
int __init whistler_baseband_init(void)
{
tegra_pinmux_config_table(whistler_null_ulpi_pinmux,
ARRAY_SIZE(whistler_null_ulpi_pinmux));
platform_device_register(&icera_baseband_device);
return 0;
}
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