mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
674 lines
18 KiB
674 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver |
|
* Copyright (C) 2018 Tony Lindgren <[email protected]> |
|
*/ |
|
|
|
#include <linux/delay.h> |
|
#include <linux/err.h> |
|
#include <linux/io.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
|
|
#include <linux/gpio/consumer.h> |
|
#include <linux/of_platform.h> |
|
#include <linux/phy/phy.h> |
|
#include <linux/pinctrl/consumer.h> |
|
|
|
#define PHY_MDM6600_PHY_DELAY_MS 4000 /* PHY enable 2.2s to 3.5s */ |
|
#define PHY_MDM6600_ENABLED_DELAY_MS 8000 /* 8s more total for MDM6600 */ |
|
#define PHY_MDM6600_WAKE_KICK_MS 600 /* time on after GPIO toggle */ |
|
#define MDM6600_MODEM_IDLE_DELAY_MS 1000 /* modem after USB suspend */ |
|
#define MDM6600_MODEM_WAKE_DELAY_MS 200 /* modem response after idle */ |
|
|
|
enum phy_mdm6600_ctrl_lines { |
|
PHY_MDM6600_ENABLE, /* USB PHY enable */ |
|
PHY_MDM6600_POWER, /* Device power */ |
|
PHY_MDM6600_RESET, /* Device reset */ |
|
PHY_MDM6600_NR_CTRL_LINES, |
|
}; |
|
|
|
enum phy_mdm6600_bootmode_lines { |
|
PHY_MDM6600_MODE0, /* out USB mode0 and OOB wake */ |
|
PHY_MDM6600_MODE1, /* out USB mode1, in OOB wake */ |
|
PHY_MDM6600_NR_MODE_LINES, |
|
}; |
|
|
|
enum phy_mdm6600_cmd_lines { |
|
PHY_MDM6600_CMD0, |
|
PHY_MDM6600_CMD1, |
|
PHY_MDM6600_CMD2, |
|
PHY_MDM6600_NR_CMD_LINES, |
|
}; |
|
|
|
enum phy_mdm6600_status_lines { |
|
PHY_MDM6600_STATUS0, |
|
PHY_MDM6600_STATUS1, |
|
PHY_MDM6600_STATUS2, |
|
PHY_MDM6600_NR_STATUS_LINES, |
|
}; |
|
|
|
/* |
|
* MDM6600 command codes. These are based on Motorola Mapphone Linux |
|
* kernel tree. |
|
*/ |
|
enum phy_mdm6600_cmd { |
|
PHY_MDM6600_CMD_BP_PANIC_ACK, |
|
PHY_MDM6600_CMD_DATA_ONLY_BYPASS, /* Reroute USB to CPCAP PHY */ |
|
PHY_MDM6600_CMD_FULL_BYPASS, /* Reroute USB to CPCAP PHY */ |
|
PHY_MDM6600_CMD_NO_BYPASS, /* Request normal USB mode */ |
|
PHY_MDM6600_CMD_BP_SHUTDOWN_REQ, /* Request device power off */ |
|
PHY_MDM6600_CMD_BP_UNKNOWN_5, |
|
PHY_MDM6600_CMD_BP_UNKNOWN_6, |
|
PHY_MDM6600_CMD_UNDEFINED, |
|
}; |
|
|
|
/* |
|
* MDM6600 status codes. These are based on Motorola Mapphone Linux |
|
* kernel tree. |
|
*/ |
|
enum phy_mdm6600_status { |
|
PHY_MDM6600_STATUS_PANIC, /* Seems to be really off */ |
|
PHY_MDM6600_STATUS_PANIC_BUSY_WAIT, |
|
PHY_MDM6600_STATUS_QC_DLOAD, |
|
PHY_MDM6600_STATUS_RAM_DOWNLOADER, /* MDM6600 USB flashing mode */ |
|
PHY_MDM6600_STATUS_PHONE_CODE_AWAKE, /* MDM6600 normal USB mode */ |
|
PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP, |
|
PHY_MDM6600_STATUS_SHUTDOWN_ACK, |
|
PHY_MDM6600_STATUS_UNDEFINED, |
|
}; |
|
|
|
static const char * const |
|
phy_mdm6600_status_name[] = { |
|
"off", "busy", "qc_dl", "ram_dl", "awake", |
|
"asleep", "shutdown", "undefined", |
|
}; |
|
|
|
struct phy_mdm6600 { |
|
struct device *dev; |
|
struct phy *generic_phy; |
|
struct phy_provider *phy_provider; |
|
struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES]; |
|
struct gpio_descs *mode_gpios; |
|
struct gpio_descs *status_gpios; |
|
struct gpio_descs *cmd_gpios; |
|
struct delayed_work bootup_work; |
|
struct delayed_work status_work; |
|
struct delayed_work modem_wake_work; |
|
struct completion ack; |
|
bool enabled; /* mdm6600 phy enabled */ |
|
bool running; /* mdm6600 boot done */ |
|
bool awake; /* mdm6600 respnds on n_gsm */ |
|
int status; |
|
}; |
|
|
|
static int phy_mdm6600_init(struct phy *x) |
|
{ |
|
struct phy_mdm6600 *ddata = phy_get_drvdata(x); |
|
struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; |
|
|
|
if (!ddata->enabled) |
|
return -EPROBE_DEFER; |
|
|
|
gpiod_set_value_cansleep(enable_gpio, 0); |
|
|
|
return 0; |
|
} |
|
|
|
static int phy_mdm6600_power_on(struct phy *x) |
|
{ |
|
struct phy_mdm6600 *ddata = phy_get_drvdata(x); |
|
struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; |
|
int error; |
|
|
|
if (!ddata->enabled) |
|
return -ENODEV; |
|
|
|
error = pinctrl_pm_select_default_state(ddata->dev); |
|
if (error) |
|
dev_warn(ddata->dev, "%s: error with default_state: %i\n", |
|
__func__, error); |
|
|
|
gpiod_set_value_cansleep(enable_gpio, 1); |
|
|
|
/* Allow aggressive PM for USB, it's only needed for n_gsm port */ |
|
if (pm_runtime_enabled(&x->dev)) |
|
phy_pm_runtime_put(x); |
|
|
|
return 0; |
|
} |
|
|
|
static int phy_mdm6600_power_off(struct phy *x) |
|
{ |
|
struct phy_mdm6600 *ddata = phy_get_drvdata(x); |
|
struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE]; |
|
int error; |
|
|
|
if (!ddata->enabled) |
|
return -ENODEV; |
|
|
|
/* Paired with phy_pm_runtime_put() in phy_mdm6600_power_on() */ |
|
if (pm_runtime_enabled(&x->dev)) { |
|
error = phy_pm_runtime_get(x); |
|
if (error < 0 && error != -EINPROGRESS) |
|
dev_warn(ddata->dev, "%s: phy_pm_runtime_get: %i\n", |
|
__func__, error); |
|
} |
|
|
|
gpiod_set_value_cansleep(enable_gpio, 0); |
|
|
|
error = pinctrl_pm_select_sleep_state(ddata->dev); |
|
if (error) |
|
dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", |
|
__func__, error); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct phy_ops gpio_usb_ops = { |
|
.init = phy_mdm6600_init, |
|
.power_on = phy_mdm6600_power_on, |
|
.power_off = phy_mdm6600_power_off, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
/** |
|
* phy_mdm6600_cmd() - send a command request to mdm6600 |
|
* @ddata: device driver data |
|
* @val: value of cmd to be set |
|
* |
|
* Configures the three command request GPIOs to the specified value. |
|
*/ |
|
static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val) |
|
{ |
|
DECLARE_BITMAP(values, PHY_MDM6600_NR_CMD_LINES); |
|
|
|
values[0] = val; |
|
|
|
gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES, |
|
ddata->cmd_gpios->desc, |
|
ddata->cmd_gpios->info, values); |
|
} |
|
|
|
/** |
|
* phy_mdm6600_status() - read mdm6600 status lines |
|
* @work: work structure |
|
*/ |
|
static void phy_mdm6600_status(struct work_struct *work) |
|
{ |
|
struct phy_mdm6600 *ddata; |
|
struct device *dev; |
|
DECLARE_BITMAP(values, PHY_MDM6600_NR_STATUS_LINES); |
|
int error; |
|
|
|
ddata = container_of(work, struct phy_mdm6600, status_work.work); |
|
dev = ddata->dev; |
|
|
|
error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES, |
|
ddata->status_gpios->desc, |
|
ddata->status_gpios->info, |
|
values); |
|
if (error) |
|
return; |
|
|
|
ddata->status = values[0] & ((1 << PHY_MDM6600_NR_STATUS_LINES) - 1); |
|
|
|
dev_info(dev, "modem status: %i %s\n", |
|
ddata->status, |
|
phy_mdm6600_status_name[ddata->status]); |
|
complete(&ddata->ack); |
|
} |
|
|
|
static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data) |
|
{ |
|
struct phy_mdm6600 *ddata = data; |
|
|
|
schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10)); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
/** |
|
* phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting |
|
* @irq: interrupt |
|
* @data: interrupt handler data |
|
* |
|
* GPIO mode1 is used initially as output to configure the USB boot |
|
* mode for mdm6600. After booting it is used as input for OOB wake |
|
* signal from mdm6600 to the SoC. Just use it for debug info only |
|
* for now. |
|
*/ |
|
static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data) |
|
{ |
|
struct phy_mdm6600 *ddata = data; |
|
struct gpio_desc *mode_gpio1; |
|
int error, wakeup; |
|
|
|
mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; |
|
wakeup = gpiod_get_value(mode_gpio1); |
|
if (!wakeup) |
|
return IRQ_NONE; |
|
|
|
dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n", wakeup); |
|
error = pm_runtime_get_sync(ddata->dev); |
|
if (error < 0) { |
|
pm_runtime_put_noidle(ddata->dev); |
|
|
|
return IRQ_NONE; |
|
} |
|
|
|
/* Just wake-up and kick the autosuspend timer */ |
|
pm_runtime_mark_last_busy(ddata->dev); |
|
pm_runtime_put_autosuspend(ddata->dev); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
/** |
|
* phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines |
|
* @ddata: device driver data |
|
*/ |
|
static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata) |
|
{ |
|
struct device *dev = ddata->dev; |
|
int i, error, irq; |
|
|
|
for (i = PHY_MDM6600_STATUS0; |
|
i <= PHY_MDM6600_STATUS2; i++) { |
|
struct gpio_desc *gpio = ddata->status_gpios->desc[i]; |
|
|
|
irq = gpiod_to_irq(gpio); |
|
if (irq <= 0) |
|
continue; |
|
|
|
error = devm_request_threaded_irq(dev, irq, NULL, |
|
phy_mdm6600_irq_thread, |
|
IRQF_TRIGGER_RISING | |
|
IRQF_TRIGGER_FALLING | |
|
IRQF_ONESHOT, |
|
"mdm6600", |
|
ddata); |
|
if (error) |
|
dev_warn(dev, "no modem status irq%i: %i\n", |
|
irq, error); |
|
} |
|
} |
|
|
|
struct phy_mdm6600_map { |
|
const char *name; |
|
int direction; |
|
}; |
|
|
|
static const struct phy_mdm6600_map |
|
phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = { |
|
{ "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */ |
|
{ "power", GPIOD_OUT_LOW, }, /* low = off */ |
|
{ "reset", GPIOD_OUT_HIGH, }, /* high = reset */ |
|
}; |
|
|
|
/** |
|
* phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines |
|
* @ddata: device driver data |
|
*/ |
|
static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata) |
|
{ |
|
struct device *dev = ddata->dev; |
|
int i; |
|
|
|
/* MDM6600 control lines */ |
|
for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) { |
|
const struct phy_mdm6600_map *map = |
|
&phy_mdm6600_ctrl_gpio_map[i]; |
|
struct gpio_desc **gpio = &ddata->ctrl_gpios[i]; |
|
|
|
*gpio = devm_gpiod_get(dev, map->name, map->direction); |
|
if (IS_ERR(*gpio)) { |
|
dev_info(dev, "gpio %s error %li\n", |
|
map->name, PTR_ERR(*gpio)); |
|
return PTR_ERR(*gpio); |
|
} |
|
} |
|
|
|
/* MDM6600 USB start-up mode output lines */ |
|
ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode", |
|
GPIOD_OUT_LOW); |
|
if (IS_ERR(ddata->mode_gpios)) |
|
return PTR_ERR(ddata->mode_gpios); |
|
|
|
if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES) |
|
return -EINVAL; |
|
|
|
/* MDM6600 status input lines */ |
|
ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status", |
|
GPIOD_IN); |
|
if (IS_ERR(ddata->status_gpios)) |
|
return PTR_ERR(ddata->status_gpios); |
|
|
|
if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES) |
|
return -EINVAL; |
|
|
|
/* MDM6600 cmd output lines */ |
|
ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd", |
|
GPIOD_OUT_LOW); |
|
if (IS_ERR(ddata->cmd_gpios)) |
|
return PTR_ERR(ddata->cmd_gpios); |
|
|
|
if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* phy_mdm6600_device_power_on() - power on mdm6600 device |
|
* @ddata: device driver data |
|
* |
|
* To get the integrated USB phy in MDM6600 takes some hoops. We must ensure |
|
* the shared USB bootmode GPIOs are configured, then request modem start-up, |
|
* reset and power-up.. And then we need to recycle the shared USB bootmode |
|
* GPIOs as they are also used for Out of Band (OOB) wake for the USB and |
|
* TS 27.010 serial mux. |
|
*/ |
|
static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata) |
|
{ |
|
struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio; |
|
int error = 0, wakeirq; |
|
|
|
mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; |
|
mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1]; |
|
reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; |
|
power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER]; |
|
|
|
/* |
|
* Shared GPIOs must be low for normal USB mode. After booting |
|
* they are used for OOB wake signaling. These can be also used |
|
* to configure USB flashing mode later on based on a module |
|
* parameter. |
|
*/ |
|
gpiod_set_value_cansleep(mode_gpio0, 0); |
|
gpiod_set_value_cansleep(mode_gpio1, 0); |
|
|
|
/* Request start-up mode */ |
|
phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS); |
|
|
|
/* Request a reset first */ |
|
gpiod_set_value_cansleep(reset_gpio, 0); |
|
msleep(100); |
|
|
|
/* Toggle power GPIO to request mdm6600 to start */ |
|
gpiod_set_value_cansleep(power_gpio, 1); |
|
msleep(100); |
|
gpiod_set_value_cansleep(power_gpio, 0); |
|
|
|
/* |
|
* Looks like the USB PHY needs between 2.2 to 4 seconds. |
|
* If we try to use it before that, we will get L3 errors |
|
* from omap-usb-host trying to access the PHY. See also |
|
* phy_mdm6600_init() for -EPROBE_DEFER. |
|
*/ |
|
msleep(PHY_MDM6600_PHY_DELAY_MS); |
|
ddata->enabled = true; |
|
|
|
/* Booting up the rest of MDM6600 will take total about 8 seconds */ |
|
dev_info(ddata->dev, "Waiting for power up request to complete..\n"); |
|
if (wait_for_completion_timeout(&ddata->ack, |
|
msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) { |
|
if (ddata->status > PHY_MDM6600_STATUS_PANIC && |
|
ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK) |
|
dev_info(ddata->dev, "Powered up OK\n"); |
|
} else { |
|
ddata->enabled = false; |
|
error = -ETIMEDOUT; |
|
dev_err(ddata->dev, "Timed out powering up\n"); |
|
} |
|
|
|
/* Reconfigure mode1 GPIO as input for OOB wake */ |
|
gpiod_direction_input(mode_gpio1); |
|
|
|
wakeirq = gpiod_to_irq(mode_gpio1); |
|
if (wakeirq <= 0) |
|
return wakeirq; |
|
|
|
error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL, |
|
phy_mdm6600_wakeirq_thread, |
|
IRQF_TRIGGER_RISING | |
|
IRQF_TRIGGER_FALLING | |
|
IRQF_ONESHOT, |
|
"mdm6600-wake", |
|
ddata); |
|
if (error) |
|
dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n", |
|
wakeirq, error); |
|
|
|
ddata->running = true; |
|
|
|
return error; |
|
} |
|
|
|
/** |
|
* phy_mdm6600_device_power_off() - power off mdm6600 device |
|
* @ddata: device driver data |
|
*/ |
|
static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata) |
|
{ |
|
struct gpio_desc *reset_gpio = |
|
ddata->ctrl_gpios[PHY_MDM6600_RESET]; |
|
|
|
ddata->enabled = false; |
|
phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ); |
|
msleep(100); |
|
|
|
gpiod_set_value_cansleep(reset_gpio, 1); |
|
|
|
dev_info(ddata->dev, "Waiting for power down request to complete.. "); |
|
if (wait_for_completion_timeout(&ddata->ack, |
|
msecs_to_jiffies(5000))) { |
|
if (ddata->status == PHY_MDM6600_STATUS_PANIC) |
|
dev_info(ddata->dev, "Powered down OK\n"); |
|
} else { |
|
dev_err(ddata->dev, "Timed out powering down\n"); |
|
} |
|
} |
|
|
|
static void phy_mdm6600_deferred_power_on(struct work_struct *work) |
|
{ |
|
struct phy_mdm6600 *ddata; |
|
int error; |
|
|
|
ddata = container_of(work, struct phy_mdm6600, bootup_work.work); |
|
|
|
error = phy_mdm6600_device_power_on(ddata); |
|
if (error) |
|
dev_err(ddata->dev, "Device not functional\n"); |
|
} |
|
|
|
/* |
|
* USB suspend puts mdm6600 into low power mode. For any n_gsm using apps, |
|
* we need to keep the modem awake by kicking it's mode0 GPIO. This will |
|
* keep the modem awake for about 1.2 seconds. When no n_gsm apps are using |
|
* the modem, runtime PM auto mode can be enabled so modem can enter low |
|
* power mode. |
|
*/ |
|
static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata) |
|
{ |
|
struct gpio_desc *mode_gpio0; |
|
|
|
mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0]; |
|
gpiod_set_value_cansleep(mode_gpio0, 1); |
|
usleep_range(5, 15); |
|
gpiod_set_value_cansleep(mode_gpio0, 0); |
|
if (ddata->awake) |
|
usleep_range(5, 15); |
|
else |
|
msleep(MDM6600_MODEM_WAKE_DELAY_MS); |
|
} |
|
|
|
static void phy_mdm6600_modem_wake(struct work_struct *work) |
|
{ |
|
struct phy_mdm6600 *ddata; |
|
|
|
ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work); |
|
phy_mdm6600_wake_modem(ddata); |
|
|
|
/* |
|
* The modem does not always stay awake 1.2 seconds after toggling |
|
* the wake GPIO, and sometimes it idles after about some 600 ms |
|
* making writes time out. |
|
*/ |
|
schedule_delayed_work(&ddata->modem_wake_work, |
|
msecs_to_jiffies(PHY_MDM6600_WAKE_KICK_MS)); |
|
} |
|
|
|
static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev) |
|
{ |
|
struct phy_mdm6600 *ddata = dev_get_drvdata(dev); |
|
|
|
cancel_delayed_work_sync(&ddata->modem_wake_work); |
|
ddata->awake = false; |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev) |
|
{ |
|
struct phy_mdm6600 *ddata = dev_get_drvdata(dev); |
|
|
|
phy_mdm6600_modem_wake(&ddata->modem_wake_work.work); |
|
ddata->awake = true; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct dev_pm_ops phy_mdm6600_pm_ops = { |
|
SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend, |
|
phy_mdm6600_runtime_resume, NULL) |
|
}; |
|
|
|
static const struct of_device_id phy_mdm6600_id_table[] = { |
|
{ .compatible = "motorola,mapphone-mdm6600", }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table); |
|
|
|
static int phy_mdm6600_probe(struct platform_device *pdev) |
|
{ |
|
struct phy_mdm6600 *ddata; |
|
int error; |
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
|
if (!ddata) |
|
return -ENOMEM; |
|
|
|
INIT_DELAYED_WORK(&ddata->bootup_work, |
|
phy_mdm6600_deferred_power_on); |
|
INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status); |
|
INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake); |
|
init_completion(&ddata->ack); |
|
|
|
ddata->dev = &pdev->dev; |
|
platform_set_drvdata(pdev, ddata); |
|
|
|
/* Active state selected in phy_mdm6600_power_on() */ |
|
error = pinctrl_pm_select_sleep_state(ddata->dev); |
|
if (error) |
|
dev_warn(ddata->dev, "%s: error with sleep_state: %i\n", |
|
__func__, error); |
|
|
|
error = phy_mdm6600_init_lines(ddata); |
|
if (error) |
|
return error; |
|
|
|
phy_mdm6600_init_irq(ddata); |
|
schedule_delayed_work(&ddata->bootup_work, 0); |
|
|
|
/* |
|
* See phy_mdm6600_device_power_on(). We should be able |
|
* to remove this eventually when ohci-platform can deal |
|
* with -EPROBE_DEFER. |
|
*/ |
|
msleep(PHY_MDM6600_PHY_DELAY_MS + 500); |
|
|
|
/* |
|
* Enable PM runtime only after PHY has been powered up properly. |
|
* It is currently only needed after USB suspends mdm6600 and n_gsm |
|
* needs to access the device. We don't want to do this earlier as |
|
* gpio mode0 pin doubles as mdm6600 wake-up gpio. |
|
*/ |
|
pm_runtime_use_autosuspend(ddata->dev); |
|
pm_runtime_set_autosuspend_delay(ddata->dev, |
|
MDM6600_MODEM_IDLE_DELAY_MS); |
|
pm_runtime_enable(ddata->dev); |
|
error = pm_runtime_get_sync(ddata->dev); |
|
if (error < 0) { |
|
dev_warn(ddata->dev, "failed to wake modem: %i\n", error); |
|
pm_runtime_put_noidle(ddata->dev); |
|
goto cleanup; |
|
} |
|
|
|
ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops); |
|
if (IS_ERR(ddata->generic_phy)) { |
|
error = PTR_ERR(ddata->generic_phy); |
|
goto idle; |
|
} |
|
|
|
phy_set_drvdata(ddata->generic_phy, ddata); |
|
|
|
ddata->phy_provider = |
|
devm_of_phy_provider_register(ddata->dev, |
|
of_phy_simple_xlate); |
|
if (IS_ERR(ddata->phy_provider)) |
|
error = PTR_ERR(ddata->phy_provider); |
|
|
|
idle: |
|
pm_runtime_mark_last_busy(ddata->dev); |
|
pm_runtime_put_autosuspend(ddata->dev); |
|
|
|
cleanup: |
|
if (error < 0) |
|
phy_mdm6600_device_power_off(ddata); |
|
|
|
return error; |
|
} |
|
|
|
static int phy_mdm6600_remove(struct platform_device *pdev) |
|
{ |
|
struct phy_mdm6600 *ddata = platform_get_drvdata(pdev); |
|
struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET]; |
|
|
|
pm_runtime_dont_use_autosuspend(ddata->dev); |
|
pm_runtime_put_sync(ddata->dev); |
|
pm_runtime_disable(ddata->dev); |
|
|
|
if (!ddata->running) |
|
wait_for_completion_timeout(&ddata->ack, |
|
msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS)); |
|
|
|
gpiod_set_value_cansleep(reset_gpio, 1); |
|
phy_mdm6600_device_power_off(ddata); |
|
|
|
cancel_delayed_work_sync(&ddata->modem_wake_work); |
|
cancel_delayed_work_sync(&ddata->bootup_work); |
|
cancel_delayed_work_sync(&ddata->status_work); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver phy_mdm6600_driver = { |
|
.probe = phy_mdm6600_probe, |
|
.remove = phy_mdm6600_remove, |
|
.driver = { |
|
.name = "phy-mapphone-mdm6600", |
|
.pm = &phy_mdm6600_pm_ops, |
|
.of_match_table = of_match_ptr(phy_mdm6600_id_table), |
|
}, |
|
}; |
|
|
|
module_platform_driver(phy_mdm6600_driver); |
|
|
|
MODULE_ALIAS("platform:gpio_usb"); |
|
MODULE_AUTHOR("Tony Lindgren <[email protected]>"); |
|
MODULE_DESCRIPTION("mdm6600 gpio usb phy driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|