Commit 5ecd52e5 authored by Roger Quadros's avatar Roger Quadros Committed by Tony Lindgren

ARM: OMAP2+: omap-usb-host: Add usbhs_init_phys()

This helper allows board support code to add the PHY's
VCC and RESET regulators which are GPIO controlled as well
as the NOP PHY device.
Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 1f0972f5
...@@ -22,8 +22,12 @@ ...@@ -22,8 +22,12 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/regulator/machine.h>
#include <asm/io.h> #include <linux/regulator/fixed.h>
#include <linux/string.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/usb/phy.h>
#include "soc.h" #include "soc.h"
#include "omap_device.h" #include "omap_device.h"
...@@ -526,3 +530,155 @@ void __init usbhs_init(struct usbhs_omap_platform_data *pdata) ...@@ -526,3 +530,155 @@ void __init usbhs_init(struct usbhs_omap_platform_data *pdata)
} }
#endif #endif
/* Template for PHY regulators */
static struct fixed_voltage_config hsusb_reg_config = {
/* .supply_name filled later */
.microvolts = 3300000,
.gpio = -1, /* updated later */
.startup_delay = 70000, /* 70msec */
.enable_high = 1, /* updated later */
.enabled_at_boot = 0, /* keep in RESET */
/* .init_data filled later */
};
static const char *nop_name = "nop_usb_xceiv"; /* NOP PHY driver */
static const char *reg_name = "reg-fixed-voltage"; /* Regulator driver */
/**
* usbhs_add_regulator - Add a gpio based fixed voltage regulator device
* @name: name for the regulator
* @dev_id: device id of the device this regulator supplies power to
* @dev_supply: supply name that the device expects
* @gpio: GPIO number
* @polarity: 1 - Active high, 0 - Active low
*/
static int usbhs_add_regulator(char *name, char *dev_id, char *dev_supply,
int gpio, int polarity)
{
struct regulator_consumer_supply *supplies;
struct regulator_init_data *reg_data;
struct fixed_voltage_config *config;
struct platform_device *pdev;
int ret;
supplies = kzalloc(sizeof(*supplies), GFP_KERNEL);
if (!supplies)
return -ENOMEM;
supplies->supply = dev_supply;
supplies->dev_name = dev_id;
reg_data = kzalloc(sizeof(*reg_data), GFP_KERNEL);
if (!reg_data)
return -ENOMEM;
reg_data->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
reg_data->consumer_supplies = supplies;
reg_data->num_consumer_supplies = 1;
config = kmemdup(&hsusb_reg_config, sizeof(hsusb_reg_config),
GFP_KERNEL);
if (!config)
return -ENOMEM;
config->supply_name = name;
config->gpio = gpio;
config->enable_high = polarity;
config->init_data = reg_data;
/* create a regulator device */
pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
if (!pdev)
return -ENOMEM;
pdev->id = PLATFORM_DEVID_AUTO;
pdev->name = reg_name;
pdev->dev.platform_data = config;
ret = platform_device_register(pdev);
if (ret)
pr_err("%s: Failed registering regulator %s for %s\n",
__func__, name, dev_id);
return ret;
}
int usbhs_init_phys(struct usbhs_phy_data *phy, int num_phys)
{
char *rail_name;
int i, len;
struct platform_device *pdev;
char *phy_id;
/* the phy_id will be something like "nop_usb_xceiv.1" */
len = strlen(nop_name) + 3; /* 3 -> ".1" and NULL terminator */
for (i = 0; i < num_phys; i++) {
if (!phy->port) {
pr_err("%s: Invalid port 0. Must start from 1\n",
__func__);
continue;
}
/* do we need a NOP PHY device ? */
if (!gpio_is_valid(phy->reset_gpio) &&
!gpio_is_valid(phy->vcc_gpio))
continue;
/* create a NOP PHY device */
pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
if (!pdev)
return -ENOMEM;
pdev->id = phy->port;
pdev->name = nop_name;
pdev->dev.platform_data = phy->platform_data;
phy_id = kmalloc(len, GFP_KERNEL);
if (!phy_id)
return -ENOMEM;
scnprintf(phy_id, len, "nop_usb_xceiv.%d\n",
pdev->id);
if (platform_device_register(pdev)) {
pr_err("%s: Failed to register device %s\n",
__func__, phy_id);
continue;
}
usb_bind_phy("ehci-omap.0", phy->port - 1, phy_id);
/* Do we need RESET regulator ? */
if (gpio_is_valid(phy->reset_gpio)) {
rail_name = kmalloc(13, GFP_KERNEL);
if (!rail_name)
return -ENOMEM;
scnprintf(rail_name, 13, "hsusb%d_reset", phy->port);
usbhs_add_regulator(rail_name, phy_id, "reset",
phy->reset_gpio, 1);
}
/* Do we need VCC regulator ? */
if (gpio_is_valid(phy->vcc_gpio)) {
rail_name = kmalloc(13, GFP_KERNEL);
if (!rail_name)
return -ENOMEM;
scnprintf(rail_name, 13, "hsusb%d_vcc", phy->port);
usbhs_add_regulator(rail_name, phy_id, "vcc",
phy->vcc_gpio, phy->vcc_polarity);
}
phy++;
}
return 0;
}
...@@ -53,8 +53,17 @@ ...@@ -53,8 +53,17 @@
#define USBPHY_OTGSESSEND_EN (1 << 20) #define USBPHY_OTGSESSEND_EN (1 << 20)
#define USBPHY_DATA_POLARITY (1 << 23) #define USBPHY_DATA_POLARITY (1 << 23)
struct usbhs_phy_data {
int port; /* 1 indexed port number */
int reset_gpio;
int vcc_gpio;
bool vcc_polarity; /* 1 active high, 0 active low */
void *platform_data;
};
extern void usb_musb_init(struct omap_musb_board_data *board_data); extern void usb_musb_init(struct omap_musb_board_data *board_data);
extern void usbhs_init(struct usbhs_omap_platform_data *pdata); extern void usbhs_init(struct usbhs_omap_platform_data *pdata);
extern int usbhs_init_phys(struct usbhs_phy_data *phy, int num_phys);
extern void am35x_musb_reset(void); extern void am35x_musb_reset(void);
extern void am35x_musb_phy_power(u8 on); extern void am35x_musb_phy_power(u8 on);
......
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