The PHY framework provides a set of APIs to control a PHY. This API is derived from the linux version of the generic PHY framework. Currently the API supports init(), deinit(), power_on, power_off() and reset(). The framework provides a way to get a reference to a phy from the device-tree.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com --- drivers/Kconfig | 2 ++ drivers/Makefile | 1 + drivers/phy/Kconfig | 32 ++++++++++++++++++++++++ drivers/phy/Makefile | 2 ++ drivers/phy/phy-uclass.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/generic-phy.h | 36 +++++++++++++++++++++++++++ 7 files changed, 138 insertions(+) create mode 100644 drivers/phy/Kconfig create mode 100644 drivers/phy/Makefile create mode 100644 drivers/phy/phy-uclass.c create mode 100644 include/generic-phy.h
diff --git a/drivers/Kconfig b/drivers/Kconfig index 0e5d97d..a90ceca 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -88,6 +88,8 @@ source "drivers/video/Kconfig"
source "drivers/watchdog/Kconfig"
+source "drivers/phy/Kconfig" + config PHYS_TO_BUS bool "Custom physical to bus address mapping" help diff --git a/drivers/Makefile b/drivers/Makefile index 5d8baa5..0be0624 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_$(SPL_)CLK) += clk/ obj-$(CONFIG_$(SPL_)LED) += led/ obj-$(CONFIG_$(SPL_)PINCTRL) += pinctrl/ obj-$(CONFIG_$(SPL_)RAM) += ram/ +obj-$(CONFIG_$(SPL_)GENERIC_PHY) += phy/
ifdef CONFIG_SPL_BUILD
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig new file mode 100644 index 0000000..d66c9e3 --- /dev/null +++ b/drivers/phy/Kconfig @@ -0,0 +1,32 @@ + +menu "PHY Subsystem" + +config GENERIC_PHY + bool "PHY Core" + depends on DM + help + Generic PHY support. + + This framework is designed to provide a generic interface for PHY + devices. PHYs are commonly used for high speed interfaces such as + SATA or PCIe. + The API provides functions to initialize/deinitialize the + phy, power on/off the phy, and reset the phy. It's meant to be as + compatible as possible with the equivalent framework found in the + linux kernel. + +config SPL_GENERIC_PHY + bool "PHY Core in SPL" + depends on DM + help + Generic PHY support in SPL. + + This framework is designed to provide a generic interface for PHY + devices. PHYs are commonly used for high speed interfaces such as + SATA or PCIe. + The API provides functions to initialize/deinitialize the + phy, power on/off the phy, and reset the phy. It's meant to be as + compatible as possible with the equivalent framework found in the + linux kernel. + +endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile new file mode 100644 index 0000000..b29a8b9 --- /dev/null +++ b/drivers/phy/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_$(SPL_)GENERIC_PHY) += phy-uclass.o + diff --git a/drivers/phy/phy-uclass.c b/drivers/phy/phy-uclass.c new file mode 100644 index 0000000..e15ed43 --- /dev/null +++ b/drivers/phy/phy-uclass.c @@ -0,0 +1,64 @@ +/* + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Written by Jean-Jacques Hiblot jjhiblot@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <generic-phy.h> + +struct udevice *dm_generic_phy_get(struct udevice *parent, const char *string) +{ + struct udevice *dev; + + int rc = uclass_get_device_by_phandle(UCLASS_PHY, parent, + string, &dev); + if (rc) { + debug("unable to find generic_phy device (err: %d)\n", rc); + return ERR_PTR(rc); + } + + return dev; +} + +int generic_phy_init(struct udevice *dev) +{ + struct generic_phy_ops const *ops = dev->driver->ops; + + return (ops && ops->init) ? ops->init(dev) : 0; +} + +int generic_phy_reset(struct udevice *dev) +{ + struct generic_phy_ops const *ops = dev->driver->ops; + + return (ops && ops->reset) ? ops->reset(dev) : 0; +} + +int generic_phy_exit(struct udevice *dev) +{ + struct generic_phy_ops const *ops = dev->driver->ops; + + return (ops && ops->exit) ? ops->exit(dev) : 0; +} + +int generic_phy_power_on(struct udevice *dev) +{ + struct generic_phy_ops const *ops = dev->driver->ops; + + return (ops && ops->power_on) ? ops->power_on(dev) : 0; +} + +int generic_phy_power_off(struct udevice *dev) +{ + struct generic_phy_ops const *ops = dev->driver->ops; + + return (ops && ops->power_off) ? ops->power_off(dev) : 0; +} + +UCLASS_DRIVER(generic_phy) = { + .id = UCLASS_PHY, + .name = "generic_phy", +}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 8c92d0b..9d34a32 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -83,6 +83,7 @@ enum uclass_id { UCLASS_VIDEO, /* Video or LCD device */ UCLASS_VIDEO_BRIDGE, /* Video bridge, e.g. DisplayPort to LVDS */ UCLASS_VIDEO_CONSOLE, /* Text console driver for video device */ + UCLASS_PHY, /* generic PHY device */
UCLASS_COUNT, UCLASS_INVALID = -1, diff --git a/include/generic-phy.h b/include/generic-phy.h new file mode 100644 index 0000000..24475f0 --- /dev/null +++ b/include/generic-phy.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ + * Written by Jean-Jacques Hiblot jjhiblot@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __GENERIC_PHY_H +#define __GENERIC_PHY_H + +/* + * struct udevice_ops - set of function pointers for phy operations + * @init: operation to be performed for initializing phy (optionnal) + * @exit: operation to be performed while exiting (optionnal) + * @reset: reset the phy (optionnal). + * @power_on: powering on the phy (optionnal) + * @power_off: powering off the phy (optionnal) + */ +struct generic_phy_ops { + int (*init)(struct udevice *phy); + int (*exit)(struct udevice *phy); + int (*reset)(struct udevice *phy); + int (*power_on)(struct udevice *phy); + int (*power_off)(struct udevice *phy); +}; + + +int generic_phy_init(struct udevice *phy); +int generic_phy_reset(struct udevice *phy); +int generic_phy_exit(struct udevice *phy); +int generic_phy_power_on(struct udevice *phy); +int generic_phy_power_off(struct udevice *phy); + +struct udevice *dm_generic_phy_get(struct udevice *parent, const char *string); + +#endif /*__GENERIC_PHY_H */