dbd47012a4
i.MX95 will have its own pinctrl scmi driver, so need block pinctrl-scmi driver for i.MX95, otherwise there will be two pinctrl devices for a single scmi protocol@19. Signed-off-by: Peng Fan <peng.fan@nxp.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com> Link: https://lore.kernel.org/r/20240521-pinctrl-scmi-imx95-v1-2-9a1175d735fd@nxp.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
581 lines
14 KiB
C
581 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* System Control and Power Interface (SCMI) Protocol based pinctrl driver
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*
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* Copyright (C) 2024 EPAM
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* Copyright 2024 NXP
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/of.h>
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#include <linux/scmi_protocol.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/pinctrl/machine.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include "pinctrl-utils.h"
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#include "core.h"
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#include "pinconf.h"
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#define DRV_NAME "scmi-pinctrl"
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/* Define num configs, if not large than 4 use stack, else use kcalloc() */
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#define SCMI_NUM_CONFIGS 4
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static const struct scmi_pinctrl_proto_ops *pinctrl_ops;
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struct scmi_pinctrl {
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struct device *dev;
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struct scmi_protocol_handle *ph;
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struct pinctrl_dev *pctldev;
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struct pinctrl_desc pctl_desc;
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struct pinfunction *functions;
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unsigned int nr_functions;
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struct pinctrl_pin_desc *pins;
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unsigned int nr_pins;
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};
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static int pinctrl_scmi_get_groups_count(struct pinctrl_dev *pctldev)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->count_get(pmx->ph, GROUP_TYPE);
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}
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static const char *pinctrl_scmi_get_group_name(struct pinctrl_dev *pctldev,
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unsigned int selector)
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{
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int ret;
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const char *name;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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ret = pinctrl_ops->name_get(pmx->ph, selector, GROUP_TYPE, &name);
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if (ret) {
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dev_err(pmx->dev, "get name failed with err %d", ret);
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return NULL;
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}
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return name;
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}
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static int pinctrl_scmi_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned int selector,
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const unsigned int **pins,
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unsigned int *num_pins)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->group_pins_get(pmx->ph, selector, pins, num_pins);
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}
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static const struct pinctrl_ops pinctrl_scmi_pinctrl_ops = {
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.get_groups_count = pinctrl_scmi_get_groups_count,
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.get_group_name = pinctrl_scmi_get_group_name,
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.get_group_pins = pinctrl_scmi_get_group_pins,
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#ifdef CONFIG_OF
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.dt_node_to_map = pinconf_generic_dt_node_to_map_all,
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.dt_free_map = pinconf_generic_dt_free_map,
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#endif
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};
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static int pinctrl_scmi_get_functions_count(struct pinctrl_dev *pctldev)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->count_get(pmx->ph, FUNCTION_TYPE);
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}
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static const char *pinctrl_scmi_get_function_name(struct pinctrl_dev *pctldev,
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unsigned int selector)
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{
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int ret;
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const char *name;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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ret = pinctrl_ops->name_get(pmx->ph, selector, FUNCTION_TYPE, &name);
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if (ret) {
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dev_err(pmx->dev, "get name failed with err %d", ret);
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return NULL;
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}
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return name;
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}
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static int pinctrl_scmi_get_function_groups(struct pinctrl_dev *pctldev,
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unsigned int selector,
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const char * const **p_groups,
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unsigned int * const p_num_groups)
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{
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struct pinfunction *func;
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const unsigned int *group_ids;
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unsigned int num_groups;
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const char **groups;
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int ret, i;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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if (!p_groups || !p_num_groups)
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return -EINVAL;
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if (selector >= pmx->nr_functions)
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return -EINVAL;
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func = &pmx->functions[selector];
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if (func->ngroups)
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goto done;
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ret = pinctrl_ops->function_groups_get(pmx->ph, selector, &num_groups,
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&group_ids);
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if (ret) {
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dev_err(pmx->dev, "Unable to get function groups, err %d", ret);
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return ret;
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}
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if (!num_groups)
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return -EINVAL;
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groups = kcalloc(num_groups, sizeof(*groups), GFP_KERNEL);
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if (!groups)
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return -ENOMEM;
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for (i = 0; i < num_groups; i++) {
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groups[i] = pinctrl_scmi_get_group_name(pctldev, group_ids[i]);
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if (!groups[i]) {
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ret = -EINVAL;
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goto err_free;
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}
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}
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func->ngroups = num_groups;
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func->groups = groups;
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done:
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*p_groups = func->groups;
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*p_num_groups = func->ngroups;
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return 0;
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err_free:
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kfree(groups);
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return ret;
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}
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static int pinctrl_scmi_func_set_mux(struct pinctrl_dev *pctldev,
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unsigned int selector, unsigned int group)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->mux_set(pmx->ph, selector, group);
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}
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static int pinctrl_scmi_request(struct pinctrl_dev *pctldev,
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unsigned int offset)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->pin_request(pmx->ph, offset);
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}
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static int pinctrl_scmi_free(struct pinctrl_dev *pctldev, unsigned int offset)
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{
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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return pinctrl_ops->pin_free(pmx->ph, offset);
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}
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static const struct pinmux_ops pinctrl_scmi_pinmux_ops = {
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.request = pinctrl_scmi_request,
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.free = pinctrl_scmi_free,
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.get_functions_count = pinctrl_scmi_get_functions_count,
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.get_function_name = pinctrl_scmi_get_function_name,
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.get_function_groups = pinctrl_scmi_get_function_groups,
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.set_mux = pinctrl_scmi_func_set_mux,
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};
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static int pinctrl_scmi_map_pinconf_type(enum pin_config_param param,
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enum scmi_pinctrl_conf_type *type)
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{
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u32 arg = param;
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switch (arg) {
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case PIN_CONFIG_BIAS_BUS_HOLD:
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*type = SCMI_PIN_BIAS_BUS_HOLD;
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break;
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case PIN_CONFIG_BIAS_DISABLE:
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*type = SCMI_PIN_BIAS_DISABLE;
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break;
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case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
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*type = SCMI_PIN_BIAS_HIGH_IMPEDANCE;
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break;
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case PIN_CONFIG_BIAS_PULL_DOWN:
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*type = SCMI_PIN_BIAS_PULL_DOWN;
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break;
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case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
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*type = SCMI_PIN_BIAS_PULL_DEFAULT;
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break;
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case PIN_CONFIG_BIAS_PULL_UP:
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*type = SCMI_PIN_BIAS_PULL_UP;
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break;
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case PIN_CONFIG_DRIVE_OPEN_DRAIN:
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*type = SCMI_PIN_DRIVE_OPEN_DRAIN;
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break;
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case PIN_CONFIG_DRIVE_OPEN_SOURCE:
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*type = SCMI_PIN_DRIVE_OPEN_SOURCE;
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break;
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case PIN_CONFIG_DRIVE_PUSH_PULL:
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*type = SCMI_PIN_DRIVE_PUSH_PULL;
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break;
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case PIN_CONFIG_DRIVE_STRENGTH:
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*type = SCMI_PIN_DRIVE_STRENGTH;
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break;
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case PIN_CONFIG_DRIVE_STRENGTH_UA:
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*type = SCMI_PIN_DRIVE_STRENGTH;
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break;
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case PIN_CONFIG_INPUT_DEBOUNCE:
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*type = SCMI_PIN_INPUT_DEBOUNCE;
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break;
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case PIN_CONFIG_INPUT_ENABLE:
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*type = SCMI_PIN_INPUT_MODE;
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break;
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case PIN_CONFIG_INPUT_SCHMITT:
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*type = SCMI_PIN_INPUT_SCHMITT;
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break;
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case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
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*type = SCMI_PIN_INPUT_MODE;
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break;
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case PIN_CONFIG_MODE_LOW_POWER:
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*type = SCMI_PIN_LOW_POWER_MODE;
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break;
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case PIN_CONFIG_OUTPUT:
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*type = SCMI_PIN_OUTPUT_VALUE;
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break;
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case PIN_CONFIG_OUTPUT_ENABLE:
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*type = SCMI_PIN_OUTPUT_MODE;
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break;
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case PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS:
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*type = SCMI_PIN_OUTPUT_VALUE;
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break;
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case PIN_CONFIG_POWER_SOURCE:
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*type = SCMI_PIN_POWER_SOURCE;
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break;
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case PIN_CONFIG_SLEW_RATE:
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*type = SCMI_PIN_SLEW_RATE;
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break;
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case SCMI_PIN_OEM_START ... SCMI_PIN_OEM_END:
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*type = arg;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int pinctrl_scmi_pinconf_get(struct pinctrl_dev *pctldev,
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unsigned int pin, unsigned long *config)
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{
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int ret;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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enum pin_config_param config_type;
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enum scmi_pinctrl_conf_type type;
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u32 config_value;
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if (!config)
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return -EINVAL;
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config_type = pinconf_to_config_param(*config);
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ret = pinctrl_scmi_map_pinconf_type(config_type, &type);
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if (ret)
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return ret;
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ret = pinctrl_ops->settings_get_one(pmx->ph, pin, PIN_TYPE, type,
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&config_value);
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/* Convert SCMI error code to PINCTRL expected error code */
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if (ret == -EOPNOTSUPP)
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return -ENOTSUPP;
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if (ret)
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return ret;
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*config = pinconf_to_config_packed(config_type, config_value);
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return 0;
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}
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static int
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pinctrl_scmi_alloc_configs(struct pinctrl_dev *pctldev, u32 num_configs,
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u32 **p_config_value,
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enum scmi_pinctrl_conf_type **p_config_type)
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{
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if (num_configs <= SCMI_NUM_CONFIGS)
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return 0;
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*p_config_value = kcalloc(num_configs, sizeof(**p_config_value), GFP_KERNEL);
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if (!*p_config_value)
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return -ENOMEM;
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*p_config_type = kcalloc(num_configs, sizeof(**p_config_type), GFP_KERNEL);
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if (!*p_config_type) {
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kfree(*p_config_value);
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return -ENOMEM;
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}
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return 0;
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}
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static void
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pinctrl_scmi_free_configs(struct pinctrl_dev *pctldev, u32 num_configs,
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u32 **p_config_value,
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enum scmi_pinctrl_conf_type **p_config_type)
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{
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if (num_configs <= SCMI_NUM_CONFIGS)
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return;
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kfree(*p_config_value);
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kfree(*p_config_type);
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}
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static int pinctrl_scmi_pinconf_set(struct pinctrl_dev *pctldev,
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unsigned int pin,
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unsigned long *configs,
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unsigned int num_configs)
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{
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int i, ret;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS];
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u32 config_value[SCMI_NUM_CONFIGS];
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enum scmi_pinctrl_conf_type *p_config_type = config_type;
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u32 *p_config_value = config_value;
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enum pin_config_param param;
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if (!configs || !num_configs)
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return -EINVAL;
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ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type,
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&p_config_value);
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if (ret)
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return ret;
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for (i = 0; i < num_configs; i++) {
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param = pinconf_to_config_param(configs[i]);
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ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]);
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if (ret) {
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dev_err(pmx->dev, "Error map pinconf_type %d\n", ret);
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goto free_config;
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}
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p_config_value[i] = pinconf_to_config_argument(configs[i]);
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}
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ret = pinctrl_ops->settings_conf(pmx->ph, pin, PIN_TYPE, num_configs,
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p_config_type, p_config_value);
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if (ret)
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dev_err(pmx->dev, "Error parsing config %d\n", ret);
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free_config:
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pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type,
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&p_config_value);
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return ret;
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}
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static int pinctrl_scmi_pinconf_group_set(struct pinctrl_dev *pctldev,
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unsigned int group,
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unsigned long *configs,
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unsigned int num_configs)
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{
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int i, ret;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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enum scmi_pinctrl_conf_type config_type[SCMI_NUM_CONFIGS];
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u32 config_value[SCMI_NUM_CONFIGS];
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enum scmi_pinctrl_conf_type *p_config_type = config_type;
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u32 *p_config_value = config_value;
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enum pin_config_param param;
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if (!configs || !num_configs)
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return -EINVAL;
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ret = pinctrl_scmi_alloc_configs(pctldev, num_configs, &p_config_type,
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&p_config_value);
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if (ret)
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return ret;
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for (i = 0; i < num_configs; i++) {
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param = pinconf_to_config_param(configs[i]);
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ret = pinctrl_scmi_map_pinconf_type(param, &p_config_type[i]);
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if (ret) {
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dev_err(pmx->dev, "Error map pinconf_type %d\n", ret);
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goto free_config;
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}
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p_config_value[i] = pinconf_to_config_argument(configs[i]);
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}
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ret = pinctrl_ops->settings_conf(pmx->ph, group, GROUP_TYPE,
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num_configs, p_config_type,
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p_config_value);
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if (ret)
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dev_err(pmx->dev, "Error parsing config %d", ret);
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free_config:
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pinctrl_scmi_free_configs(pctldev, num_configs, &p_config_type,
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&p_config_value);
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return ret;
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};
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static int pinctrl_scmi_pinconf_group_get(struct pinctrl_dev *pctldev,
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unsigned int group,
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unsigned long *config)
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{
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int ret;
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struct scmi_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
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enum pin_config_param config_type;
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enum scmi_pinctrl_conf_type type;
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u32 config_value;
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if (!config)
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return -EINVAL;
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config_type = pinconf_to_config_param(*config);
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ret = pinctrl_scmi_map_pinconf_type(config_type, &type);
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if (ret) {
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dev_err(pmx->dev, "Error map pinconf_type %d\n", ret);
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return ret;
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}
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ret = pinctrl_ops->settings_get_one(pmx->ph, group, GROUP_TYPE, type,
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&config_value);
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/* Convert SCMI error code to PINCTRL expected error code */
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if (ret == -EOPNOTSUPP)
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return -ENOTSUPP;
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if (ret)
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return ret;
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*config = pinconf_to_config_packed(config_type, config_value);
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return 0;
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}
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static const struct pinconf_ops pinctrl_scmi_pinconf_ops = {
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.is_generic = true,
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.pin_config_get = pinctrl_scmi_pinconf_get,
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.pin_config_set = pinctrl_scmi_pinconf_set,
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.pin_config_group_set = pinctrl_scmi_pinconf_group_set,
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.pin_config_group_get = pinctrl_scmi_pinconf_group_get,
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.pin_config_config_dbg_show = pinconf_generic_dump_config,
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};
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static int pinctrl_scmi_get_pins(struct scmi_pinctrl *pmx,
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struct pinctrl_desc *desc)
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{
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struct pinctrl_pin_desc *pins;
|
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unsigned int npins;
|
|
int ret, i;
|
|
|
|
npins = pinctrl_ops->count_get(pmx->ph, PIN_TYPE);
|
|
/*
|
|
* npins will never be zero, the scmi pinctrl driver has bailed out
|
|
* if npins is zero.
|
|
*/
|
|
pins = devm_kmalloc_array(pmx->dev, npins, sizeof(*pins), GFP_KERNEL);
|
|
if (!pins)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < npins; i++) {
|
|
pins[i].number = i;
|
|
/*
|
|
* The memory for name is handled by the scmi firmware driver,
|
|
* no need free here
|
|
*/
|
|
ret = pinctrl_ops->name_get(pmx->ph, i, PIN_TYPE, &pins[i].name);
|
|
if (ret)
|
|
return dev_err_probe(pmx->dev, ret,
|
|
"Can't get name for pin %d", i);
|
|
}
|
|
|
|
desc->npins = npins;
|
|
desc->pins = pins;
|
|
dev_dbg(pmx->dev, "got pins %u", npins);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const scmi_pinctrl_blocklist[] = {
|
|
"fsl,imx95",
|
|
NULL
|
|
};
|
|
|
|
static int scmi_pinctrl_probe(struct scmi_device *sdev)
|
|
{
|
|
int ret;
|
|
struct device *dev = &sdev->dev;
|
|
struct scmi_pinctrl *pmx;
|
|
const struct scmi_handle *handle;
|
|
struct scmi_protocol_handle *ph;
|
|
|
|
if (!sdev->handle)
|
|
return -EINVAL;
|
|
|
|
if (of_machine_compatible_match(scmi_pinctrl_blocklist))
|
|
return -ENODEV;
|
|
|
|
handle = sdev->handle;
|
|
|
|
pinctrl_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PINCTRL, &ph);
|
|
if (IS_ERR(pinctrl_ops))
|
|
return PTR_ERR(pinctrl_ops);
|
|
|
|
pmx = devm_kzalloc(dev, sizeof(*pmx), GFP_KERNEL);
|
|
if (!pmx)
|
|
return -ENOMEM;
|
|
|
|
pmx->ph = ph;
|
|
|
|
pmx->dev = dev;
|
|
pmx->pctl_desc.name = DRV_NAME;
|
|
pmx->pctl_desc.owner = THIS_MODULE;
|
|
pmx->pctl_desc.pctlops = &pinctrl_scmi_pinctrl_ops;
|
|
pmx->pctl_desc.pmxops = &pinctrl_scmi_pinmux_ops;
|
|
pmx->pctl_desc.confops = &pinctrl_scmi_pinconf_ops;
|
|
|
|
ret = pinctrl_scmi_get_pins(pmx, &pmx->pctl_desc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = devm_pinctrl_register_and_init(dev, &pmx->pctl_desc, pmx,
|
|
&pmx->pctldev);
|
|
if (ret)
|
|
return dev_err_probe(dev, ret, "Failed to register pinctrl\n");
|
|
|
|
pmx->nr_functions = pinctrl_scmi_get_functions_count(pmx->pctldev);
|
|
pmx->functions = devm_kcalloc(dev, pmx->nr_functions,
|
|
sizeof(*pmx->functions), GFP_KERNEL);
|
|
if (!pmx->functions)
|
|
return -ENOMEM;
|
|
|
|
return pinctrl_enable(pmx->pctldev);
|
|
}
|
|
|
|
static const struct scmi_device_id scmi_id_table[] = {
|
|
{ SCMI_PROTOCOL_PINCTRL, "pinctrl" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(scmi, scmi_id_table);
|
|
|
|
static struct scmi_driver scmi_pinctrl_driver = {
|
|
.name = DRV_NAME,
|
|
.probe = scmi_pinctrl_probe,
|
|
.id_table = scmi_id_table,
|
|
};
|
|
module_scmi_driver(scmi_pinctrl_driver);
|
|
|
|
MODULE_AUTHOR("Oleksii Moisieiev <oleksii_moisieiev@epam.com>");
|
|
MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
|
|
MODULE_DESCRIPTION("ARM SCMI pin controller driver");
|
|
MODULE_LICENSE("GPL");
|