From fa989ae7c7b38efbc6c3370571fb8a6f7350029a Mon Sep 17 00:00:00 2001 From: Sai Krishna Potthuri Date: Thu, 22 Apr 2021 14:00:00 +0530 Subject: [PATCH] firmware: xilinx: Add pinctrl support Adding pinctrl support to query platform specific information (pins) from firmware. Signed-off-by: Sai Krishna Potthuri Acked-by: Michal Simek Link: https://lore.kernel.org/r/1619080202-31924-2-git-send-email-lakshmi.sai.krishna.potthuri@xilinx.com Signed-off-by: Linus Walleij --- drivers/firmware/xilinx/zynqmp.c | 114 +++++++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 90 +++++++++++++++++++++ 2 files changed, 204 insertions(+) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index 7eb9958662dd..fc01a3632815 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -811,6 +811,120 @@ int zynqmp_pm_fpga_get_status(u32 *value) } EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status); +/** + * zynqmp_pm_pinctrl_request - Request Pin from firmware + * @pin: Pin number to request + * + * This function requests pin from firmware. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_request(const u32 pin) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request); + +/** + * zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released + * @pin: Pin number to release + * + * This function release pin from firmware. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_release(const u32 pin) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, pin, 0, 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release); + +/** + * zynqmp_pm_pinctrl_get_function - Read function id set for the given pin + * @pin: Pin number + * @id: Buffer to store function ID + * + * This function provides the function currently set for the given pin. + * + * Return: Returns status, either success or error+reason + */ +int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!id) + return -EINVAL; + + ret = zynqmp_pm_invoke_fn(PM_PINCTRL_GET_FUNCTION, pin, 0, + 0, 0, ret_payload); + *id = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_function); + +/** + * zynqmp_pm_pinctrl_set_function - Set requested function for the pin + * @pin: Pin number + * @id: Function ID to set + * + * This function sets requested function for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, pin, id, + 0, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function); + +/** + * zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin + * @pin: Pin number + * @param: Parameter to get + * @value: Buffer to store parameter value + * + * This function gets requested configuration parameter for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param, + u32 *value) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!value) + return -EINVAL; + + ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, pin, param, + 0, 0, ret_payload); + *value = ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config); + +/** + * zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin + * @pin: Pin number + * @param: Parameter to set + * @value: Parameter value to set + * + * This function sets requested configuration parameter for the given pin. + * + * Return: Returns status, either success or error+reason. + */ +int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, + u32 value) +{ + return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin, + param, value, 0, NULL); +} +EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config); + /** * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller * master has initialized its own power management diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 71177b17eee5..8285a4bcfc2d 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -72,6 +72,12 @@ enum pm_api_id { PM_FPGA_LOAD = 22, PM_FPGA_GET_STATUS = 23, PM_GET_CHIPID = 24, + PM_PINCTRL_REQUEST = 28, + PM_PINCTRL_RELEASE = 29, + PM_PINCTRL_GET_FUNCTION = 30, + PM_PINCTRL_SET_FUNCTION = 31, + PM_PINCTRL_CONFIG_PARAM_GET = 32, + PM_PINCTRL_CONFIG_PARAM_SET = 33, PM_IOCTL = 34, PM_QUERY_DATA = 35, PM_CLOCK_ENABLE = 36, @@ -122,6 +128,12 @@ enum pm_query_id { PM_QID_CLOCK_GET_FIXEDFACTOR_PARAMS = 3, PM_QID_CLOCK_GET_PARENTS = 4, PM_QID_CLOCK_GET_ATTRIBUTES = 5, + PM_QID_PINCTRL_GET_NUM_PINS = 6, + PM_QID_PINCTRL_GET_NUM_FUNCTIONS = 7, + PM_QID_PINCTRL_GET_NUM_FUNCTION_GROUPS = 8, + PM_QID_PINCTRL_GET_FUNCTION_NAME = 9, + PM_QID_PINCTRL_GET_FUNCTION_GROUPS = 10, + PM_QID_PINCTRL_GET_PIN_GROUPS = 11, PM_QID_CLOCK_GET_NUM_CLOCKS = 12, PM_QID_CLOCK_GET_MAX_DIVISOR = 13, }; @@ -285,6 +297,44 @@ enum dll_reset_type { PM_DLL_RESET_PULSE = 2, }; +enum pm_pinctrl_config_param { + PM_PINCTRL_CONFIG_SLEW_RATE = 0, + PM_PINCTRL_CONFIG_BIAS_STATUS = 1, + PM_PINCTRL_CONFIG_PULL_CTRL = 2, + PM_PINCTRL_CONFIG_SCHMITT_CMOS = 3, + PM_PINCTRL_CONFIG_DRIVE_STRENGTH = 4, + PM_PINCTRL_CONFIG_VOLTAGE_STATUS = 5, + PM_PINCTRL_CONFIG_TRI_STATE = 6, + PM_PINCTRL_CONFIG_MAX = 7, +}; + +enum pm_pinctrl_slew_rate { + PM_PINCTRL_SLEW_RATE_FAST = 0, + PM_PINCTRL_SLEW_RATE_SLOW = 1, +}; + +enum pm_pinctrl_bias_status { + PM_PINCTRL_BIAS_DISABLE = 0, + PM_PINCTRL_BIAS_ENABLE = 1, +}; + +enum pm_pinctrl_pull_ctrl { + PM_PINCTRL_BIAS_PULL_DOWN = 0, + PM_PINCTRL_BIAS_PULL_UP = 1, +}; + +enum pm_pinctrl_schmitt_cmos { + PM_PINCTRL_INPUT_TYPE_CMOS = 0, + PM_PINCTRL_INPUT_TYPE_SCHMITT = 1, +}; + +enum pm_pinctrl_drive_strength { + PM_PINCTRL_DRIVE_STRENGTH_2MA = 0, + PM_PINCTRL_DRIVE_STRENGTH_4MA = 1, + PM_PINCTRL_DRIVE_STRENGTH_8MA = 2, + PM_PINCTRL_DRIVE_STRENGTH_12MA = 3, +}; + enum zynqmp_pm_shutdown_type { ZYNQMP_PM_SHUTDOWN_TYPE_SHUTDOWN = 0, ZYNQMP_PM_SHUTDOWN_TYPE_RESET = 1, @@ -353,6 +403,14 @@ int zynqmp_pm_write_pggs(u32 index, u32 value); int zynqmp_pm_read_pggs(u32 index, u32 *value); int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype); int zynqmp_pm_set_boot_health_status(u32 value); +int zynqmp_pm_pinctrl_request(const u32 pin); +int zynqmp_pm_pinctrl_release(const u32 pin); +int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id); +int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id); +int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param, + u32 *value); +int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, + u32 value); #else static inline struct zynqmp_eemi_ops *zynqmp_pm_get_eemi_ops(void) { @@ -537,6 +595,38 @@ static inline int zynqmp_pm_set_boot_health_status(u32 value) { return -ENODEV; } + +static inline int zynqmp_pm_pinctrl_request(const u32 pin) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_pinctrl_release(const u32 pin) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param, + u32 *value) +{ + return -ENODEV; +} + +static inline int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, + u32 value) +{ + return -ENODEV; +} #endif #endif /* __FIRMWARE_ZYNQMP_H__ */