Commit b96eea71 authored by A.s. Dong's avatar A.s. Dong Committed by Linus Walleij

pinctrl: fsl: add scu based pinctrl support

Some i.MX SoCs (e.g. MX8QXP and MX8QM) contain a system controller
that is responsible for controlling the pad setting of the IPs that
are present. Communication between the host processor running an OS
and the system controller happens through a SCU protocol.

This patch classifies the pad settings into two categories: MMIO and SCU.
For the original MMIO method, no functional changes except organize them
into a few imx_*_mmio() functions. Besides that, we add the SCU based
Pad Mux and Pinconf setting support which are implemented in pinctrl-scu.c.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Signed-off-by: default avatarDong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Linus Walleij's avatarLinus Walleij <linus.walleij@linaro.org>
parent 1ccb0426
......@@ -5,6 +5,10 @@ config PINCTRL_IMX
select GENERIC_PINCONF
select REGMAP
config PINCTRL_IMX_SCU
bool
select PINCTRL_IMX
config PINCTRL_IMX1_CORE
bool
select PINMUX
......
# SPDX-License-Identifier: GPL-2.0
# Freescale pin control drivers
obj-$(CONFIG_PINCTRL_IMX) += pinctrl-imx.o
obj-$(CONFIG_PINCTRL_IMX_SCU) += pinctrl-scu.o
obj-$(CONFIG_PINCTRL_IMX1_CORE) += pinctrl-imx1-core.o
obj-$(CONFIG_PINCTRL_IMX1) += pinctrl-imx1.o
obj-$(CONFIG_PINCTRL_IMX21) += pinctrl-imx21.o
......
This diff is collapsed.
......@@ -19,22 +19,43 @@ struct platform_device;
extern struct pinmux_ops imx_pmx_ops;
/**
* struct imx_pin - describes a single i.MX pin
* @pin: the pin_id of this pin
* struct imx_pin_mmio - MMIO pin configurations
* @mux_mode: the mux mode for this pin.
* @input_reg: the select input register offset for this pin if any
* 0 if no select input setting needed.
* @input_val: the select input value for this pin.
* @configs: the config for this pin.
*/
struct imx_pin {
unsigned int pin;
struct imx_pin_mmio {
unsigned int mux_mode;
u16 input_reg;
unsigned int input_val;
unsigned long config;
};
/**
* struct imx_pin_scu - SCU pin configurations
* @mux: the mux mode for this pin.
* @configs: the config for this pin.
*/
struct imx_pin_scu {
unsigned int mux_mode;
unsigned long config;
};
/**
* struct imx_pin - describes a single i.MX pin
* @pin: the pin_id of this pin
* @conf: config type of this pin, either mmio or scu
*/
struct imx_pin {
unsigned int pin;
union {
struct imx_pin_mmio mmio;
struct imx_pin_scu scu;
} conf;
};
/**
* struct imx_pin_reg - describe a pin reg map
* @mux_reg: mux register offset
......@@ -99,8 +120,9 @@ struct imx_pinctrl {
#define IMX_CFG_PARAMS_DECODE_INVERT(p, m, o) \
{ .param = p, .mask = m, .shift = o, .invert = true, }
#define SHARE_MUX_CONF_REG 0x1
#define ZERO_OFFSET_VALID 0x2
#define SHARE_MUX_CONF_REG BIT(0)
#define ZERO_OFFSET_VALID BIT(1)
#define IMX_USE_SCU BIT(2)
#define NO_MUX 0x0
#define NO_PAD 0x0
......@@ -113,4 +135,37 @@ struct imx_pinctrl {
int imx_pinctrl_probe(struct platform_device *pdev,
const struct imx_pinctrl_soc_info *info);
#ifdef CONFIG_PINCTRL_IMX_SCU
#define BM_PAD_CTL_GP_ENABLE BIT(30)
#define BM_PAD_CTL_IFMUX_ENABLE BIT(31)
#define BP_PAD_CTL_IFMUX 27
int imx_pinctrl_sc_ipc_init(struct platform_device *pdev);
int imx_pinconf_get_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
unsigned long *config);
int imx_pinconf_set_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
unsigned long *configs, unsigned num_configs);
void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
unsigned int *pin_id, struct imx_pin *pin,
const __be32 **list_p);
#else
static inline int imx_pinconf_get_scu(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *config)
{
return -EINVAL;
}
static inline int imx_pinconf_set_scu(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *configs,
unsigned num_configs)
{
return -EINVAL;
}
static inline void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
unsigned int *pin_id,
struct imx_pin *pin,
const __be32 **list_p)
{
}
#endif
#endif /* __DRIVERS_PINCTRL_IMX_H */
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Freescale Semiconductor, Inc.
* Copyright 2017-2018 NXP
* Dong Aisheng <aisheng.dong@nxp.com>
*/
#include <linux/err.h>
#include <linux/firmware/imx/sci.h>
#include <linux/of_address.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/platform_device.h>
#include "../core.h"
#include "pinctrl-imx.h"
enum pad_func_e {
IMX_SC_PAD_FUNC_SET = 15,
IMX_SC_PAD_FUNC_GET = 16,
};
struct imx_sc_msg_req_pad_set {
struct imx_sc_rpc_msg hdr;
u32 val;
u16 pad;
} __packed;
struct imx_sc_msg_req_pad_get {
struct imx_sc_rpc_msg hdr;
u16 pad;
} __packed;
struct imx_sc_msg_resp_pad_get {
struct imx_sc_rpc_msg hdr;
u32 val;
} __packed;
struct imx_sc_ipc *pinctrl_ipc_handle;
int imx_pinctrl_sc_ipc_init(struct platform_device *pdev)
{
return imx_scu_get_handle(&pinctrl_ipc_handle);
}
int imx_pinconf_get_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
unsigned long *config)
{
struct imx_sc_msg_req_pad_get msg;
struct imx_sc_msg_resp_pad_get *resp;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
int ret;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = IMX_SC_RPC_SVC_PAD;
hdr->func = IMX_SC_PAD_FUNC_GET;
hdr->size = 2;
msg.pad = pin_id;
ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
if (ret)
return ret;
resp = (struct imx_sc_msg_resp_pad_get *)&msg;
*config = resp->val;
return 0;
}
int imx_pinconf_set_scu(struct pinctrl_dev *pctldev, unsigned pin_id,
unsigned long *configs, unsigned num_configs)
{
struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
struct imx_sc_msg_req_pad_set msg;
struct imx_sc_rpc_msg *hdr = &msg.hdr;
unsigned int mux = configs[0];
unsigned int conf = configs[1];
unsigned int val;
int ret;
/*
* Set mux and conf together in one IPC call
*/
WARN_ON(num_configs != 2);
val = conf | BM_PAD_CTL_IFMUX_ENABLE | BM_PAD_CTL_GP_ENABLE;
val |= mux << BP_PAD_CTL_IFMUX;
hdr->ver = IMX_SC_RPC_VERSION;
hdr->svc = IMX_SC_RPC_SVC_PAD;
hdr->func = IMX_SC_PAD_FUNC_SET;
hdr->size = 3;
msg.pad = pin_id;
msg.val = val;
ret = imx_scu_call_rpc(pinctrl_ipc_handle, &msg, true);
dev_dbg(ipctl->dev, "write: pin_id %u config 0x%x val 0x%x\n",
pin_id, conf, val);
return ret;
}
void imx_pinctrl_parse_pin_scu(struct imx_pinctrl *ipctl,
unsigned int *pin_id, struct imx_pin *pin,
const __be32 **list_p)
{
const struct imx_pinctrl_soc_info *info = ipctl->info;
struct imx_pin_scu *pin_scu = &pin->conf.scu;
const __be32 *list = *list_p;
pin->pin = be32_to_cpu(*list++);
*pin_id = pin->pin;
pin_scu->mux_mode = be32_to_cpu(*list++);
pin_scu->config = be32_to_cpu(*list++);
*list_p = list;
dev_dbg(ipctl->dev, "%s: 0x%x 0x%08lx", info->pins[pin->pin].name,
pin_scu->mux_mode, pin_scu->config);
}
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