diff options
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/phy/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/phy-sun4i-usb.c | 9 | ||||
| -rw-r--r-- | drivers/phy/phy-tusb1210.c | 153 | ||||
| -rw-r--r-- | drivers/phy/ulpi_phy.h | 31 |
5 files changed, 201 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 36788b6f0220..56e1b7585d27 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -309,6 +309,13 @@ config PHY_QCOM_UFS help Support for UFS PHY on QCOM chipsets. +config PHY_TUSB1210 + tristate "TI TUSB1210 ULPI PHY module" + depends on USB_ULPI_BUS + select GENERIC_PHY + help + Support for TI TUSB1210 USB ULPI PHY. + config PHY_BRCMSTB_SATA tristate "Broadcom STB SATA PHY driver" depends on ARCH_BRCMSTB diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index c61f3fdd191e..bc92b427e5ca 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -40,4 +40,5 @@ obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o +obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c index a2b08f3ccb03..e17c539e4f6f 100644 --- a/drivers/phy/phy-sun4i-usb.c +++ b/drivers/phy/phy-sun4i-usb.c @@ -30,6 +30,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/phy/phy.h> +#include <linux/phy/phy-sun4i-usb.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> #include <linux/reset.h> @@ -58,6 +59,7 @@ #define PHY_OTG_FUNC_EN 0x28 #define PHY_VBUS_DET_EN 0x29 #define PHY_DISCON_TH_SEL 0x2a +#define PHY_SQUELCH_DETECT 0x3c #define MAX_PHYS 3 @@ -204,6 +206,13 @@ static int sun4i_usb_phy_power_off(struct phy *_phy) return 0; } +void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled) +{ + struct sun4i_usb_phy *phy = phy_get_drvdata(_phy); + + sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2); +} + static struct phy_ops sun4i_usb_phy_ops = { .init = sun4i_usb_phy_init, .exit = sun4i_usb_phy_exit, diff --git a/drivers/phy/phy-tusb1210.c b/drivers/phy/phy-tusb1210.c new file mode 100644 index 000000000000..07efdd318bdc --- /dev/null +++ b/drivers/phy/phy-tusb1210.c @@ -0,0 +1,153 @@ +/** + * tusb1210.c - TUSB1210 USB ULPI PHY driver + * + * Copyright (C) 2015 Intel Corporation + * + * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> + * + * 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/module.h> +#include <linux/ulpi/driver.h> +#include <linux/gpio/consumer.h> + +#include "ulpi_phy.h" + +#define TUSB1210_VENDOR_SPECIFIC2 0x80 +#define TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT 0 +#define TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT 4 +#define TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT 6 + +struct tusb1210 { + struct ulpi *ulpi; + struct phy *phy; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_cs; + u8 vendor_specific2; +}; + +static int tusb1210_power_on(struct phy *phy) +{ + struct tusb1210 *tusb = phy_get_drvdata(phy); + + gpiod_set_value_cansleep(tusb->gpio_reset, 1); + gpiod_set_value_cansleep(tusb->gpio_cs, 1); + + /* Restore the optional eye diagram optimization value */ + if (tusb->vendor_specific2) + ulpi_write(tusb->ulpi, TUSB1210_VENDOR_SPECIFIC2, + tusb->vendor_specific2); + + return 0; +} + +static int tusb1210_power_off(struct phy *phy) +{ + struct tusb1210 *tusb = phy_get_drvdata(phy); + + gpiod_set_value_cansleep(tusb->gpio_reset, 0); + gpiod_set_value_cansleep(tusb->gpio_cs, 0); + + return 0; +} + +static struct phy_ops phy_ops = { + .power_on = tusb1210_power_on, + .power_off = tusb1210_power_off, + .owner = THIS_MODULE, +}; + +static int tusb1210_probe(struct ulpi *ulpi) +{ + struct gpio_desc *gpio; + struct tusb1210 *tusb; + u8 val, reg; + int ret; + + tusb = devm_kzalloc(&ulpi->dev, sizeof(*tusb), GFP_KERNEL); + if (!tusb) + return -ENOMEM; + + gpio = devm_gpiod_get(&ulpi->dev, "reset"); + if (!IS_ERR(gpio)) { + ret = gpiod_direction_output(gpio, 0); + if (ret) + return ret; + gpiod_set_value_cansleep(gpio, 1); + tusb->gpio_reset = gpio; + } + + gpio = devm_gpiod_get(&ulpi->dev, "cs"); + if (!IS_ERR(gpio)) { + ret = gpiod_direction_output(gpio, 0); + if (ret) + return ret; + gpiod_set_value_cansleep(gpio, 1); + tusb->gpio_cs = gpio; + } + + /* + * VENDOR_SPECIFIC2 register in TUSB1210 can be used for configuring eye + * diagram optimization and DP/DM swap. + */ + + /* High speed output drive strength configuration */ + device_property_read_u8(&ulpi->dev, "ihstx", &val); + reg = val << TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT; + + /* High speed output impedance configuration */ + device_property_read_u8(&ulpi->dev, "zhsdrv", &val); + reg |= val << TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT; + + /* DP/DM swap control */ + device_property_read_u8(&ulpi->dev, "datapolarity", &val); + reg |= val << TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT; + + if (reg) { + ulpi_write(ulpi, TUSB1210_VENDOR_SPECIFIC2, reg); + tusb->vendor_specific2 = reg; + } + + tusb->phy = ulpi_phy_create(ulpi, &phy_ops); + if (IS_ERR(tusb->phy)) + return PTR_ERR(tusb->phy); + + tusb->ulpi = ulpi; + + phy_set_drvdata(tusb->phy, tusb); + ulpi_set_drvdata(ulpi, tusb); + return 0; +} + +static void tusb1210_remove(struct ulpi *ulpi) +{ + struct tusb1210 *tusb = ulpi_get_drvdata(ulpi); + + ulpi_phy_destroy(ulpi, tusb->phy); +} + +#define TI_VENDOR_ID 0x0451 + +static const struct ulpi_device_id tusb1210_ulpi_id[] = { + { TI_VENDOR_ID, 0x1507, }, + { }, +}; +MODULE_DEVICE_TABLE(ulpi, tusb1210_ulpi_id); + +static struct ulpi_driver tusb1210_driver = { + .id_table = tusb1210_ulpi_id, + .probe = tusb1210_probe, + .remove = tusb1210_remove, + .driver = { + .name = "tusb1210", + .owner = THIS_MODULE, + }, +}; + +module_ulpi_driver(tusb1210_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TUSB1210 ULPI PHY driver"); diff --git a/drivers/phy/ulpi_phy.h b/drivers/phy/ulpi_phy.h new file mode 100644 index 000000000000..ac49fb6285ee --- /dev/null +++ b/drivers/phy/ulpi_phy.h @@ -0,0 +1,31 @@ +#include <linux/phy/phy.h> + +/** + * Helper that registers PHY for a ULPI device and adds a lookup for binding it + * and it's controller, which is always the parent. + */ +static inline struct phy +*ulpi_phy_create(struct ulpi *ulpi, struct phy_ops *ops) +{ + struct phy *phy; + int ret; + + phy = phy_create(&ulpi->dev, NULL, ops); + if (IS_ERR(phy)) + return phy; + + ret = phy_create_lookup(phy, "usb2-phy", dev_name(ulpi->dev.parent)); + if (ret) { + phy_destroy(phy); + return ERR_PTR(ret); + } + + return phy; +} + +/* Remove a PHY that was created with ulpi_phy_create() and it's lookup. */ +static inline void ulpi_phy_destroy(struct ulpi *ulpi, struct phy *phy) +{ + phy_remove_lookup(phy, "usb2-phy", dev_name(ulpi->dev.parent)); + phy_destroy(phy); +} |