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![Dan Carpenter](/assets/img/avatar_default.png)
We need to unlock here before returning -EINVAL.
Fixes: 6ca5274d1d
('pinctrl: rockchip: add rk3188 specifics')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1571 lines
39 KiB
C
1571 lines
39 KiB
C
/*
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* Pinctrl driver for Rockchip SoCs
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*
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* Copyright (c) 2013 MundoReader S.L.
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* Author: Heiko Stuebner <heiko@sntech.de>
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*
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* With some ideas taken from pinctrl-samsung:
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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* Copyright (c) 2012 Linaro Ltd
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* http://www.linaro.org
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*
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* and pinctrl-at91:
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* Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/bitops.h>
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#include <linux/gpio.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.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/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/irqchip/chained_irq.h>
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#include <linux/clk.h>
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#include <dt-bindings/pinctrl/rockchip.h>
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#include "core.h"
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#include "pinconf.h"
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/* GPIO control registers */
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#define GPIO_SWPORT_DR 0x00
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#define GPIO_SWPORT_DDR 0x04
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#define GPIO_INTEN 0x30
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#define GPIO_INTMASK 0x34
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#define GPIO_INTTYPE_LEVEL 0x38
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#define GPIO_INT_POLARITY 0x3c
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#define GPIO_INT_STATUS 0x40
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#define GPIO_INT_RAWSTATUS 0x44
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#define GPIO_DEBOUNCE 0x48
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#define GPIO_PORTS_EOI 0x4c
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#define GPIO_EXT_PORT 0x50
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#define GPIO_LS_SYNC 0x60
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enum rockchip_pinctrl_type {
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RK2928,
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RK3066B,
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RK3188,
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};
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enum rockchip_pin_bank_type {
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COMMON_BANK,
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RK3188_BANK0,
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};
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/**
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* @reg_base: register base of the gpio bank
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* @reg_pull: optional separate register for additional pull settings
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* @clk: clock of the gpio bank
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* @irq: interrupt of the gpio bank
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* @pin_base: first pin number
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* @nr_pins: number of pins in this bank
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* @name: name of the bank
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* @bank_num: number of the bank, to account for holes
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* @valid: are all necessary informations present
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* @of_node: dt node of this bank
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* @drvdata: common pinctrl basedata
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* @domain: irqdomain of the gpio bank
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* @gpio_chip: gpiolib chip
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* @grange: gpio range
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* @slock: spinlock for the gpio bank
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*/
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struct rockchip_pin_bank {
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void __iomem *reg_base;
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void __iomem *reg_pull;
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struct clk *clk;
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int irq;
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u32 pin_base;
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u8 nr_pins;
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char *name;
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u8 bank_num;
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enum rockchip_pin_bank_type bank_type;
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bool valid;
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struct device_node *of_node;
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struct rockchip_pinctrl *drvdata;
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struct irq_domain *domain;
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struct gpio_chip gpio_chip;
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struct pinctrl_gpio_range grange;
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spinlock_t slock;
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u32 toggle_edge_mode;
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};
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#define PIN_BANK(id, pins, label) \
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{ \
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.bank_num = id, \
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.nr_pins = pins, \
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.name = label, \
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}
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/**
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*/
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struct rockchip_pin_ctrl {
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struct rockchip_pin_bank *pin_banks;
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u32 nr_banks;
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u32 nr_pins;
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char *label;
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enum rockchip_pinctrl_type type;
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int mux_offset;
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void (*pull_calc_reg)(struct rockchip_pin_bank *bank, int pin_num,
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void __iomem **reg, u8 *bit);
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};
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struct rockchip_pin_config {
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unsigned int func;
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unsigned long *configs;
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unsigned int nconfigs;
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};
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/**
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* struct rockchip_pin_group: represent group of pins of a pinmux function.
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* @name: name of the pin group, used to lookup the group.
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* @pins: the pins included in this group.
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* @npins: number of pins included in this group.
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* @func: the mux function number to be programmed when selected.
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* @configs: the config values to be set for each pin
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* @nconfigs: number of configs for each pin
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*/
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struct rockchip_pin_group {
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const char *name;
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unsigned int npins;
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unsigned int *pins;
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struct rockchip_pin_config *data;
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};
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/**
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* struct rockchip_pmx_func: represent a pin function.
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* @name: name of the pin function, used to lookup the function.
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* @groups: one or more names of pin groups that provide this function.
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* @num_groups: number of groups included in @groups.
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*/
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struct rockchip_pmx_func {
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const char *name;
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const char **groups;
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u8 ngroups;
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};
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struct rockchip_pinctrl {
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void __iomem *reg_base;
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void __iomem *reg_pull;
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struct device *dev;
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struct rockchip_pin_ctrl *ctrl;
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struct pinctrl_desc pctl;
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struct pinctrl_dev *pctl_dev;
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struct rockchip_pin_group *groups;
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unsigned int ngroups;
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struct rockchip_pmx_func *functions;
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unsigned int nfunctions;
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};
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static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
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{
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return container_of(gc, struct rockchip_pin_bank, gpio_chip);
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}
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static const inline struct rockchip_pin_group *pinctrl_name_to_group(
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const struct rockchip_pinctrl *info,
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const char *name)
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{
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int i;
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for (i = 0; i < info->ngroups; i++) {
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if (!strcmp(info->groups[i].name, name))
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return &info->groups[i];
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}
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return NULL;
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}
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/*
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* given a pin number that is local to a pin controller, find out the pin bank
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* and the register base of the pin bank.
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*/
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static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
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unsigned pin)
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{
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struct rockchip_pin_bank *b = info->ctrl->pin_banks;
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while (pin >= (b->pin_base + b->nr_pins))
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b++;
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return b;
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}
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static struct rockchip_pin_bank *bank_num_to_bank(
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struct rockchip_pinctrl *info,
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unsigned num)
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{
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struct rockchip_pin_bank *b = info->ctrl->pin_banks;
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int i;
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for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
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if (b->bank_num == num)
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return b;
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}
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return ERR_PTR(-EINVAL);
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}
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/*
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* Pinctrl_ops handling
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*/
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static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
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{
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struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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return info->ngroups;
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}
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static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
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unsigned selector)
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{
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struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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return info->groups[selector].name;
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}
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static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned selector, const unsigned **pins,
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unsigned *npins)
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{
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struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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if (selector >= info->ngroups)
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return -EINVAL;
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*pins = info->groups[selector].pins;
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*npins = info->groups[selector].npins;
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return 0;
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}
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static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
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struct device_node *np,
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struct pinctrl_map **map, unsigned *num_maps)
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{
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struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
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const struct rockchip_pin_group *grp;
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struct pinctrl_map *new_map;
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struct device_node *parent;
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int map_num = 1;
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int i;
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/*
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* first find the group of this node and check if we need to create
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* config maps for pins
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*/
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grp = pinctrl_name_to_group(info, np->name);
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if (!grp) {
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dev_err(info->dev, "unable to find group for node %s\n",
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np->name);
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return -EINVAL;
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}
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map_num += grp->npins;
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new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
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GFP_KERNEL);
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if (!new_map)
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return -ENOMEM;
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*map = new_map;
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*num_maps = map_num;
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/* create mux map */
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parent = of_get_parent(np);
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if (!parent) {
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devm_kfree(pctldev->dev, new_map);
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return -EINVAL;
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}
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new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
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new_map[0].data.mux.function = parent->name;
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new_map[0].data.mux.group = np->name;
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of_node_put(parent);
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/* create config map */
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new_map++;
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for (i = 0; i < grp->npins; i++) {
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new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
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new_map[i].data.configs.group_or_pin =
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pin_get_name(pctldev, grp->pins[i]);
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new_map[i].data.configs.configs = grp->data[i].configs;
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new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
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}
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dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
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(*map)->data.mux.function, (*map)->data.mux.group, map_num);
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return 0;
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}
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static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
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struct pinctrl_map *map, unsigned num_maps)
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{
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}
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static const struct pinctrl_ops rockchip_pctrl_ops = {
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.get_groups_count = rockchip_get_groups_count,
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.get_group_name = rockchip_get_group_name,
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.get_group_pins = rockchip_get_group_pins,
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.dt_node_to_map = rockchip_dt_node_to_map,
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.dt_free_map = rockchip_dt_free_map,
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};
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/*
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* Hardware access
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*/
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/*
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* Set a new mux function for a pin.
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*
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* The register is divided into the upper and lower 16 bit. When changing
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* a value, the previous register value is not read and changed. Instead
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* it seems the changed bits are marked in the upper 16 bit, while the
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* changed value gets set in the same offset in the lower 16 bit.
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* All pin settings seem to be 2 bit wide in both the upper and lower
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* parts.
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* @bank: pin bank to change
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* @pin: pin to change
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* @mux: new mux function to set
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*/
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static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
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{
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struct rockchip_pinctrl *info = bank->drvdata;
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void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
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unsigned long flags;
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u8 bit;
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u32 data;
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dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
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bank->bank_num, pin, mux);
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/* get basic quadrupel of mux registers and the correct reg inside */
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reg += bank->bank_num * 0x10;
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reg += (pin / 8) * 4;
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bit = (pin % 8) * 2;
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spin_lock_irqsave(&bank->slock, flags);
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data = (3 << (bit + 16));
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data |= (mux & 3) << bit;
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writel(data, reg);
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spin_unlock_irqrestore(&bank->slock, flags);
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}
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#define RK2928_PULL_OFFSET 0x118
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#define RK2928_PULL_PINS_PER_REG 16
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#define RK2928_PULL_BANK_STRIDE 8
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static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
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int pin_num, void __iomem **reg, u8 *bit)
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{
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struct rockchip_pinctrl *info = bank->drvdata;
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*reg = info->reg_base + RK2928_PULL_OFFSET;
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*reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
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*reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
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*bit = pin_num % RK2928_PULL_PINS_PER_REG;
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};
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#define RK3188_PULL_BITS_PER_PIN 2
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#define RK3188_PULL_PINS_PER_REG 8
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#define RK3188_PULL_BANK_STRIDE 16
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static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
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int pin_num, void __iomem **reg, u8 *bit)
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{
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struct rockchip_pinctrl *info = bank->drvdata;
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/* The first 12 pins of the first bank are located elsewhere */
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if (bank->bank_type == RK3188_BANK0 && pin_num < 12) {
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*reg = bank->reg_pull +
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((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
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*bit = pin_num % RK3188_PULL_PINS_PER_REG;
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*bit *= RK3188_PULL_BITS_PER_PIN;
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} else {
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*reg = info->reg_pull - 4;
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*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
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*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
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/*
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* The bits in these registers have an inverse ordering
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* with the lowest pin being in bits 15:14 and the highest
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* pin in bits 1:0
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*/
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*bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
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*bit *= RK3188_PULL_BITS_PER_PIN;
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}
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}
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static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
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{
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struct rockchip_pinctrl *info = bank->drvdata;
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struct rockchip_pin_ctrl *ctrl = info->ctrl;
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void __iomem *reg;
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u8 bit;
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u32 data;
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/* rk3066b does support any pulls */
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if (ctrl->type == RK3066B)
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return PIN_CONFIG_BIAS_DISABLE;
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ctrl->pull_calc_reg(bank, pin_num, ®, &bit);
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switch (ctrl->type) {
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case RK2928:
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return !(readl_relaxed(reg) & BIT(bit))
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? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
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: PIN_CONFIG_BIAS_DISABLE;
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case RK3188:
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data = readl_relaxed(reg) >> bit;
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data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
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switch (data) {
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case 0:
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return PIN_CONFIG_BIAS_DISABLE;
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case 1:
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return PIN_CONFIG_BIAS_PULL_UP;
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case 2:
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return PIN_CONFIG_BIAS_PULL_DOWN;
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case 3:
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return PIN_CONFIG_BIAS_BUS_HOLD;
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}
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dev_err(info->dev, "unknown pull setting\n");
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return -EIO;
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default:
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dev_err(info->dev, "unsupported pinctrl type\n");
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return -EINVAL;
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};
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}
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|
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static int rockchip_set_pull(struct rockchip_pin_bank *bank,
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int pin_num, int pull)
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{
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struct rockchip_pinctrl *info = bank->drvdata;
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struct rockchip_pin_ctrl *ctrl = info->ctrl;
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void __iomem *reg;
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unsigned long flags;
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u8 bit;
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u32 data;
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dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
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bank->bank_num, pin_num, pull);
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/* rk3066b does support any pulls */
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if (ctrl->type == RK3066B)
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return pull ? -EINVAL : 0;
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ctrl->pull_calc_reg(bank, pin_num, ®, &bit);
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switch (ctrl->type) {
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case RK2928:
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spin_lock_irqsave(&bank->slock, flags);
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data = BIT(bit + 16);
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if (pull == PIN_CONFIG_BIAS_DISABLE)
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data |= BIT(bit);
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writel(data, reg);
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spin_unlock_irqrestore(&bank->slock, flags);
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break;
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case RK3188:
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spin_lock_irqsave(&bank->slock, flags);
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|
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/* enable the write to the equivalent lower bits */
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data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
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switch (pull) {
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
break;
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
data |= (1 << bit);
|
|
break;
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
data |= (2 << bit);
|
|
break;
|
|
case PIN_CONFIG_BIAS_BUS_HOLD:
|
|
data |= (3 << bit);
|
|
break;
|
|
default:
|
|
spin_unlock_irqrestore(&bank->slock, flags);
|
|
dev_err(info->dev, "unsupported pull setting %d\n",
|
|
pull);
|
|
return -EINVAL;
|
|
}
|
|
|
|
writel(data, reg);
|
|
|
|
spin_unlock_irqrestore(&bank->slock, flags);
|
|
break;
|
|
default:
|
|
dev_err(info->dev, "unsupported pinctrl type\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Pinmux_ops handling
|
|
*/
|
|
|
|
static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->nfunctions;
|
|
}
|
|
|
|
static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
|
|
unsigned selector)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
return info->functions[selector].name;
|
|
}
|
|
|
|
static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
|
|
unsigned selector, const char * const **groups,
|
|
unsigned * const num_groups)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
|
|
*groups = info->functions[selector].groups;
|
|
*num_groups = info->functions[selector].ngroups;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
|
|
unsigned group)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
const unsigned int *pins = info->groups[group].pins;
|
|
const struct rockchip_pin_config *data = info->groups[group].data;
|
|
struct rockchip_pin_bank *bank;
|
|
int cnt;
|
|
|
|
dev_dbg(info->dev, "enable function %s group %s\n",
|
|
info->functions[selector].name, info->groups[group].name);
|
|
|
|
/*
|
|
* for each pin in the pin group selected, program the correspoding pin
|
|
* pin function number in the config register.
|
|
*/
|
|
for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
|
|
bank = pin_to_bank(info, pins[cnt]);
|
|
rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
|
|
data[cnt].func);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rockchip_pmx_disable(struct pinctrl_dev *pctldev,
|
|
unsigned selector, unsigned group)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
const unsigned int *pins = info->groups[group].pins;
|
|
struct rockchip_pin_bank *bank;
|
|
int cnt;
|
|
|
|
dev_dbg(info->dev, "disable function %s group %s\n",
|
|
info->functions[selector].name, info->groups[group].name);
|
|
|
|
for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
|
|
bank = pin_to_bank(info, pins[cnt]);
|
|
rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The calls to gpio_direction_output() and gpio_direction_input()
|
|
* leads to this function call (via the pinctrl_gpio_direction_{input|output}()
|
|
* function called from the gpiolib interface).
|
|
*/
|
|
static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
|
|
struct pinctrl_gpio_range *range,
|
|
unsigned offset, bool input)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct rockchip_pin_bank *bank;
|
|
struct gpio_chip *chip;
|
|
int pin;
|
|
u32 data;
|
|
|
|
chip = range->gc;
|
|
bank = gc_to_pin_bank(chip);
|
|
pin = offset - chip->base;
|
|
|
|
dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
|
|
offset, range->name, pin, input ? "input" : "output");
|
|
|
|
rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
|
|
|
|
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
|
|
/* set bit to 1 for output, 0 for input */
|
|
if (!input)
|
|
data |= BIT(pin);
|
|
else
|
|
data &= ~BIT(pin);
|
|
writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinmux_ops rockchip_pmx_ops = {
|
|
.get_functions_count = rockchip_pmx_get_funcs_count,
|
|
.get_function_name = rockchip_pmx_get_func_name,
|
|
.get_function_groups = rockchip_pmx_get_groups,
|
|
.enable = rockchip_pmx_enable,
|
|
.disable = rockchip_pmx_disable,
|
|
.gpio_set_direction = rockchip_pmx_gpio_set_direction,
|
|
};
|
|
|
|
/*
|
|
* Pinconf_ops handling
|
|
*/
|
|
|
|
static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
|
|
enum pin_config_param pull)
|
|
{
|
|
switch (ctrl->type) {
|
|
case RK2928:
|
|
return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
|
|
pull == PIN_CONFIG_BIAS_DISABLE);
|
|
case RK3066B:
|
|
return pull ? false : true;
|
|
case RK3188:
|
|
return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* set the pin config settings for a specified pin */
|
|
static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
|
|
unsigned long *configs, unsigned num_configs)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
|
|
enum pin_config_param param;
|
|
u16 arg;
|
|
int i;
|
|
int rc;
|
|
|
|
for (i = 0; i < num_configs; i++) {
|
|
param = pinconf_to_config_param(configs[i]);
|
|
arg = pinconf_to_config_argument(configs[i]);
|
|
|
|
switch (param) {
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
rc = rockchip_set_pull(bank, pin - bank->pin_base,
|
|
param);
|
|
if (rc)
|
|
return rc;
|
|
break;
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
|
|
case PIN_CONFIG_BIAS_BUS_HOLD:
|
|
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
|
|
return -ENOTSUPP;
|
|
|
|
if (!arg)
|
|
return -EINVAL;
|
|
|
|
rc = rockchip_set_pull(bank, pin - bank->pin_base,
|
|
param);
|
|
if (rc)
|
|
return rc;
|
|
break;
|
|
default:
|
|
return -ENOTSUPP;
|
|
break;
|
|
}
|
|
} /* for each config */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* get the pin config settings for a specified pin */
|
|
static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
|
|
unsigned long *config)
|
|
{
|
|
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
|
|
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
|
|
enum pin_config_param param = pinconf_to_config_param(*config);
|
|
|
|
switch (param) {
|
|
case PIN_CONFIG_BIAS_DISABLE:
|
|
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
|
|
return -EINVAL;
|
|
|
|
*config = 0;
|
|
break;
|
|
case PIN_CONFIG_BIAS_PULL_UP:
|
|
case PIN_CONFIG_BIAS_PULL_DOWN:
|
|
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
|
|
case PIN_CONFIG_BIAS_BUS_HOLD:
|
|
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
|
|
return -ENOTSUPP;
|
|
|
|
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
|
|
return -EINVAL;
|
|
|
|
*config = 1;
|
|
break;
|
|
default:
|
|
return -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pinconf_ops rockchip_pinconf_ops = {
|
|
.pin_config_get = rockchip_pinconf_get,
|
|
.pin_config_set = rockchip_pinconf_set,
|
|
};
|
|
|
|
static const struct of_device_id rockchip_bank_match[] = {
|
|
{ .compatible = "rockchip,gpio-bank" },
|
|
{ .compatible = "rockchip,rk3188-gpio-bank0" },
|
|
{},
|
|
};
|
|
|
|
static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
|
|
struct device_node *np)
|
|
{
|
|
struct device_node *child;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
if (of_match_node(rockchip_bank_match, child))
|
|
continue;
|
|
|
|
info->nfunctions++;
|
|
info->ngroups += of_get_child_count(child);
|
|
}
|
|
}
|
|
|
|
static int rockchip_pinctrl_parse_groups(struct device_node *np,
|
|
struct rockchip_pin_group *grp,
|
|
struct rockchip_pinctrl *info,
|
|
u32 index)
|
|
{
|
|
struct rockchip_pin_bank *bank;
|
|
int size;
|
|
const __be32 *list;
|
|
int num;
|
|
int i, j;
|
|
int ret;
|
|
|
|
dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
|
|
|
|
/* Initialise group */
|
|
grp->name = np->name;
|
|
|
|
/*
|
|
* the binding format is rockchip,pins = <bank pin mux CONFIG>,
|
|
* do sanity check and calculate pins number
|
|
*/
|
|
list = of_get_property(np, "rockchip,pins", &size);
|
|
/* we do not check return since it's safe node passed down */
|
|
size /= sizeof(*list);
|
|
if (!size || size % 4) {
|
|
dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
grp->npins = size / 4;
|
|
|
|
grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
|
|
GFP_KERNEL);
|
|
grp->data = devm_kzalloc(info->dev, grp->npins *
|
|
sizeof(struct rockchip_pin_config),
|
|
GFP_KERNEL);
|
|
if (!grp->pins || !grp->data)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0, j = 0; i < size; i += 4, j++) {
|
|
const __be32 *phandle;
|
|
struct device_node *np_config;
|
|
|
|
num = be32_to_cpu(*list++);
|
|
bank = bank_num_to_bank(info, num);
|
|
if (IS_ERR(bank))
|
|
return PTR_ERR(bank);
|
|
|
|
grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
|
|
grp->data[j].func = be32_to_cpu(*list++);
|
|
|
|
phandle = list++;
|
|
if (!phandle)
|
|
return -EINVAL;
|
|
|
|
np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
|
|
ret = pinconf_generic_parse_dt_config(np_config,
|
|
&grp->data[j].configs, &grp->data[j].nconfigs);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pinctrl_parse_functions(struct device_node *np,
|
|
struct rockchip_pinctrl *info,
|
|
u32 index)
|
|
{
|
|
struct device_node *child;
|
|
struct rockchip_pmx_func *func;
|
|
struct rockchip_pin_group *grp;
|
|
int ret;
|
|
static u32 grp_index;
|
|
u32 i = 0;
|
|
|
|
dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
|
|
|
|
func = &info->functions[index];
|
|
|
|
/* Initialise function */
|
|
func->name = np->name;
|
|
func->ngroups = of_get_child_count(np);
|
|
if (func->ngroups <= 0)
|
|
return 0;
|
|
|
|
func->groups = devm_kzalloc(info->dev,
|
|
func->ngroups * sizeof(char *), GFP_KERNEL);
|
|
if (!func->groups)
|
|
return -ENOMEM;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
func->groups[i] = child->name;
|
|
grp = &info->groups[grp_index++];
|
|
ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
|
|
struct rockchip_pinctrl *info)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct device_node *child;
|
|
int ret;
|
|
int i;
|
|
|
|
rockchip_pinctrl_child_count(info, np);
|
|
|
|
dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
|
|
dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
|
|
|
|
info->functions = devm_kzalloc(dev, info->nfunctions *
|
|
sizeof(struct rockchip_pmx_func),
|
|
GFP_KERNEL);
|
|
if (!info->functions) {
|
|
dev_err(dev, "failed to allocate memory for function list\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
info->groups = devm_kzalloc(dev, info->ngroups *
|
|
sizeof(struct rockchip_pin_group),
|
|
GFP_KERNEL);
|
|
if (!info->groups) {
|
|
dev_err(dev, "failed allocate memory for ping group list\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
i = 0;
|
|
|
|
for_each_child_of_node(np, child) {
|
|
if (of_match_node(rockchip_bank_match, child))
|
|
continue;
|
|
|
|
ret = rockchip_pinctrl_parse_functions(child, info, i++);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to parse function\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pinctrl_register(struct platform_device *pdev,
|
|
struct rockchip_pinctrl *info)
|
|
{
|
|
struct pinctrl_desc *ctrldesc = &info->pctl;
|
|
struct pinctrl_pin_desc *pindesc, *pdesc;
|
|
struct rockchip_pin_bank *pin_bank;
|
|
int pin, bank, ret;
|
|
int k;
|
|
|
|
ctrldesc->name = "rockchip-pinctrl";
|
|
ctrldesc->owner = THIS_MODULE;
|
|
ctrldesc->pctlops = &rockchip_pctrl_ops;
|
|
ctrldesc->pmxops = &rockchip_pmx_ops;
|
|
ctrldesc->confops = &rockchip_pinconf_ops;
|
|
|
|
pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
|
|
info->ctrl->nr_pins, GFP_KERNEL);
|
|
if (!pindesc) {
|
|
dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
ctrldesc->pins = pindesc;
|
|
ctrldesc->npins = info->ctrl->nr_pins;
|
|
|
|
pdesc = pindesc;
|
|
for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
|
|
pin_bank = &info->ctrl->pin_banks[bank];
|
|
for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
|
|
pdesc->number = k;
|
|
pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
|
|
pin_bank->name, pin);
|
|
pdesc++;
|
|
}
|
|
}
|
|
|
|
info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
|
|
if (!info->pctl_dev) {
|
|
dev_err(&pdev->dev, "could not register pinctrl driver\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
|
|
pin_bank = &info->ctrl->pin_banks[bank];
|
|
pin_bank->grange.name = pin_bank->name;
|
|
pin_bank->grange.id = bank;
|
|
pin_bank->grange.pin_base = pin_bank->pin_base;
|
|
pin_bank->grange.base = pin_bank->gpio_chip.base;
|
|
pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
|
|
pin_bank->grange.gc = &pin_bank->gpio_chip;
|
|
pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
|
|
}
|
|
|
|
ret = rockchip_pinctrl_parse_dt(pdev, info);
|
|
if (ret) {
|
|
pinctrl_unregister(info->pctl_dev);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* GPIO handling
|
|
*/
|
|
|
|
static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
return pinctrl_request_gpio(chip->base + offset);
|
|
}
|
|
|
|
static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
pinctrl_free_gpio(chip->base + offset);
|
|
}
|
|
|
|
static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
|
|
{
|
|
struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
|
|
void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
|
|
unsigned long flags;
|
|
u32 data;
|
|
|
|
spin_lock_irqsave(&bank->slock, flags);
|
|
|
|
data = readl(reg);
|
|
data &= ~BIT(offset);
|
|
if (value)
|
|
data |= BIT(offset);
|
|
writel(data, reg);
|
|
|
|
spin_unlock_irqrestore(&bank->slock, flags);
|
|
}
|
|
|
|
/*
|
|
* Returns the level of the pin for input direction and setting of the DR
|
|
* register for output gpios.
|
|
*/
|
|
static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
|
|
u32 data;
|
|
|
|
data = readl(bank->reg_base + GPIO_EXT_PORT);
|
|
data >>= offset;
|
|
data &= 1;
|
|
return data;
|
|
}
|
|
|
|
/*
|
|
* gpiolib gpio_direction_input callback function. The setting of the pin
|
|
* mux function as 'gpio input' will be handled by the pinctrl susbsystem
|
|
* interface.
|
|
*/
|
|
static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
return pinctrl_gpio_direction_input(gc->base + offset);
|
|
}
|
|
|
|
/*
|
|
* gpiolib gpio_direction_output callback function. The setting of the pin
|
|
* mux function as 'gpio output' will be handled by the pinctrl susbsystem
|
|
* interface.
|
|
*/
|
|
static int rockchip_gpio_direction_output(struct gpio_chip *gc,
|
|
unsigned offset, int value)
|
|
{
|
|
rockchip_gpio_set(gc, offset, value);
|
|
return pinctrl_gpio_direction_output(gc->base + offset);
|
|
}
|
|
|
|
/*
|
|
* gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
|
|
* and a virtual IRQ, if not already present.
|
|
*/
|
|
static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
|
|
unsigned int virq;
|
|
|
|
if (!bank->domain)
|
|
return -ENXIO;
|
|
|
|
virq = irq_create_mapping(bank->domain, offset);
|
|
|
|
return (virq) ? : -ENXIO;
|
|
}
|
|
|
|
static const struct gpio_chip rockchip_gpiolib_chip = {
|
|
.request = rockchip_gpio_request,
|
|
.free = rockchip_gpio_free,
|
|
.set = rockchip_gpio_set,
|
|
.get = rockchip_gpio_get,
|
|
.direction_input = rockchip_gpio_direction_input,
|
|
.direction_output = rockchip_gpio_direction_output,
|
|
.to_irq = rockchip_gpio_to_irq,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
/*
|
|
* Interrupt handling
|
|
*/
|
|
|
|
static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
struct irq_chip *chip = irq_get_chip(irq);
|
|
struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
|
|
u32 polarity = 0, data = 0;
|
|
u32 pend;
|
|
bool edge_changed = false;
|
|
|
|
dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
|
|
|
|
chained_irq_enter(chip, desc);
|
|
|
|
pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
|
|
|
|
if (bank->toggle_edge_mode) {
|
|
polarity = readl_relaxed(bank->reg_base +
|
|
GPIO_INT_POLARITY);
|
|
data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
|
|
}
|
|
|
|
while (pend) {
|
|
unsigned int virq;
|
|
|
|
irq = __ffs(pend);
|
|
pend &= ~BIT(irq);
|
|
virq = irq_linear_revmap(bank->domain, irq);
|
|
|
|
if (!virq) {
|
|
dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
|
|
continue;
|
|
}
|
|
|
|
dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
|
|
|
|
/*
|
|
* Triggering IRQ on both rising and falling edge
|
|
* needs manual intervention.
|
|
*/
|
|
if (bank->toggle_edge_mode & BIT(irq)) {
|
|
if (data & BIT(irq))
|
|
polarity &= ~BIT(irq);
|
|
else
|
|
polarity |= BIT(irq);
|
|
|
|
edge_changed = true;
|
|
}
|
|
|
|
generic_handle_irq(virq);
|
|
}
|
|
|
|
if (bank->toggle_edge_mode && edge_changed) {
|
|
/* Interrupt params should only be set with ints disabled */
|
|
data = readl_relaxed(bank->reg_base + GPIO_INTEN);
|
|
writel_relaxed(0, bank->reg_base + GPIO_INTEN);
|
|
writel(polarity, bank->reg_base + GPIO_INT_POLARITY);
|
|
writel(data, bank->reg_base + GPIO_INTEN);
|
|
}
|
|
|
|
chained_irq_exit(chip, desc);
|
|
}
|
|
|
|
static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
|
|
{
|
|
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
|
|
struct rockchip_pin_bank *bank = gc->private;
|
|
u32 mask = BIT(d->hwirq);
|
|
u32 polarity;
|
|
u32 level;
|
|
u32 data;
|
|
|
|
/* make sure the pin is configured as gpio input */
|
|
rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
|
|
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
|
|
data &= ~mask;
|
|
writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
|
|
|
|
if (type & IRQ_TYPE_EDGE_BOTH)
|
|
__irq_set_handler_locked(d->irq, handle_edge_irq);
|
|
else
|
|
__irq_set_handler_locked(d->irq, handle_level_irq);
|
|
|
|
irq_gc_lock(gc);
|
|
|
|
level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
|
|
polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
|
|
|
|
switch (type) {
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
bank->toggle_edge_mode |= mask;
|
|
level |= mask;
|
|
|
|
/*
|
|
* Determine gpio state. If 1 next interrupt should be falling
|
|
* otherwise rising.
|
|
*/
|
|
data = readl(bank->reg_base + GPIO_EXT_PORT);
|
|
if (data & mask)
|
|
polarity &= ~mask;
|
|
else
|
|
polarity |= mask;
|
|
break;
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
bank->toggle_edge_mode &= ~mask;
|
|
level |= mask;
|
|
polarity |= mask;
|
|
break;
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
bank->toggle_edge_mode &= ~mask;
|
|
level |= mask;
|
|
polarity &= ~mask;
|
|
break;
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
bank->toggle_edge_mode &= ~mask;
|
|
level &= ~mask;
|
|
polarity |= mask;
|
|
break;
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
bank->toggle_edge_mode &= ~mask;
|
|
level &= ~mask;
|
|
polarity &= ~mask;
|
|
break;
|
|
default:
|
|
irq_gc_unlock(gc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
|
|
writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
|
|
|
|
irq_gc_unlock(gc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_interrupts_register(struct platform_device *pdev,
|
|
struct rockchip_pinctrl *info)
|
|
{
|
|
struct rockchip_pin_ctrl *ctrl = info->ctrl;
|
|
struct rockchip_pin_bank *bank = ctrl->pin_banks;
|
|
unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
|
|
struct irq_chip_generic *gc;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
|
|
if (!bank->valid) {
|
|
dev_warn(&pdev->dev, "bank %s is not valid\n",
|
|
bank->name);
|
|
continue;
|
|
}
|
|
|
|
bank->domain = irq_domain_add_linear(bank->of_node, 32,
|
|
&irq_generic_chip_ops, NULL);
|
|
if (!bank->domain) {
|
|
dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
|
|
bank->name);
|
|
continue;
|
|
}
|
|
|
|
ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
|
|
"rockchip_gpio_irq", handle_level_irq,
|
|
clr, 0, IRQ_GC_INIT_MASK_CACHE);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
|
|
bank->name);
|
|
irq_domain_remove(bank->domain);
|
|
continue;
|
|
}
|
|
|
|
gc = irq_get_domain_generic_chip(bank->domain, 0);
|
|
gc->reg_base = bank->reg_base;
|
|
gc->private = bank;
|
|
gc->chip_types[0].regs.mask = GPIO_INTEN;
|
|
gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
|
|
gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
|
|
gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
|
|
gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
|
|
gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
|
|
gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
|
|
|
|
irq_set_handler_data(bank->irq, bank);
|
|
irq_set_chained_handler(bank->irq, rockchip_irq_demux);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_gpiolib_register(struct platform_device *pdev,
|
|
struct rockchip_pinctrl *info)
|
|
{
|
|
struct rockchip_pin_ctrl *ctrl = info->ctrl;
|
|
struct rockchip_pin_bank *bank = ctrl->pin_banks;
|
|
struct gpio_chip *gc;
|
|
int ret;
|
|
int i;
|
|
|
|
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
|
|
if (!bank->valid) {
|
|
dev_warn(&pdev->dev, "bank %s is not valid\n",
|
|
bank->name);
|
|
continue;
|
|
}
|
|
|
|
bank->gpio_chip = rockchip_gpiolib_chip;
|
|
|
|
gc = &bank->gpio_chip;
|
|
gc->base = bank->pin_base;
|
|
gc->ngpio = bank->nr_pins;
|
|
gc->dev = &pdev->dev;
|
|
gc->of_node = bank->of_node;
|
|
gc->label = bank->name;
|
|
|
|
ret = gpiochip_add(gc);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
|
|
gc->label, ret);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
rockchip_interrupts_register(pdev, info);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (--i, --bank; i >= 0; --i, --bank) {
|
|
if (!bank->valid)
|
|
continue;
|
|
|
|
if (gpiochip_remove(&bank->gpio_chip))
|
|
dev_err(&pdev->dev, "gpio chip %s remove failed\n",
|
|
bank->gpio_chip.label);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_gpiolib_unregister(struct platform_device *pdev,
|
|
struct rockchip_pinctrl *info)
|
|
{
|
|
struct rockchip_pin_ctrl *ctrl = info->ctrl;
|
|
struct rockchip_pin_bank *bank = ctrl->pin_banks;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) {
|
|
if (!bank->valid)
|
|
continue;
|
|
|
|
ret = gpiochip_remove(&bank->gpio_chip);
|
|
}
|
|
|
|
if (ret)
|
|
dev_err(&pdev->dev, "gpio chip remove failed\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
|
|
struct device *dev)
|
|
{
|
|
struct resource res;
|
|
|
|
if (of_address_to_resource(bank->of_node, 0, &res)) {
|
|
dev_err(dev, "cannot find IO resource for bank\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
bank->reg_base = devm_ioremap_resource(dev, &res);
|
|
if (IS_ERR(bank->reg_base))
|
|
return PTR_ERR(bank->reg_base);
|
|
|
|
/*
|
|
* special case, where parts of the pull setting-registers are
|
|
* part of the PMU register space
|
|
*/
|
|
if (of_device_is_compatible(bank->of_node,
|
|
"rockchip,rk3188-gpio-bank0")) {
|
|
bank->bank_type = RK3188_BANK0;
|
|
|
|
if (of_address_to_resource(bank->of_node, 1, &res)) {
|
|
dev_err(dev, "cannot find IO resource for bank\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
bank->reg_pull = devm_ioremap_resource(dev, &res);
|
|
if (IS_ERR(bank->reg_pull))
|
|
return PTR_ERR(bank->reg_pull);
|
|
} else {
|
|
bank->bank_type = COMMON_BANK;
|
|
}
|
|
|
|
bank->irq = irq_of_parse_and_map(bank->of_node, 0);
|
|
|
|
bank->clk = of_clk_get(bank->of_node, 0);
|
|
if (IS_ERR(bank->clk))
|
|
return PTR_ERR(bank->clk);
|
|
|
|
return clk_prepare_enable(bank->clk);
|
|
}
|
|
|
|
static const struct of_device_id rockchip_pinctrl_dt_match[];
|
|
|
|
/* retrieve the soc specific data */
|
|
static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
|
|
struct rockchip_pinctrl *d,
|
|
struct platform_device *pdev)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct device_node *np;
|
|
struct rockchip_pin_ctrl *ctrl;
|
|
struct rockchip_pin_bank *bank;
|
|
int i;
|
|
|
|
match = of_match_node(rockchip_pinctrl_dt_match, node);
|
|
ctrl = (struct rockchip_pin_ctrl *)match->data;
|
|
|
|
for_each_child_of_node(node, np) {
|
|
if (!of_find_property(np, "gpio-controller", NULL))
|
|
continue;
|
|
|
|
bank = ctrl->pin_banks;
|
|
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
|
|
if (!strcmp(bank->name, np->name)) {
|
|
bank->of_node = np;
|
|
|
|
if (!rockchip_get_bank_data(bank, &pdev->dev))
|
|
bank->valid = true;
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
bank = ctrl->pin_banks;
|
|
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
|
|
spin_lock_init(&bank->slock);
|
|
bank->drvdata = d;
|
|
bank->pin_base = ctrl->nr_pins;
|
|
ctrl->nr_pins += bank->nr_pins;
|
|
}
|
|
|
|
return ctrl;
|
|
}
|
|
|
|
static int rockchip_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct rockchip_pinctrl *info;
|
|
struct device *dev = &pdev->dev;
|
|
struct rockchip_pin_ctrl *ctrl;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
if (!dev->of_node) {
|
|
dev_err(dev, "device tree node not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
|
|
if (!ctrl) {
|
|
dev_err(dev, "driver data not available\n");
|
|
return -EINVAL;
|
|
}
|
|
info->ctrl = ctrl;
|
|
info->dev = dev;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
info->reg_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(info->reg_base))
|
|
return PTR_ERR(info->reg_base);
|
|
|
|
/* The RK3188 has its pull registers in a separate place */
|
|
if (ctrl->type == RK3188) {
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
info->reg_pull = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(info->reg_pull))
|
|
return PTR_ERR(info->reg_pull);
|
|
}
|
|
|
|
ret = rockchip_gpiolib_register(pdev, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rockchip_pinctrl_register(pdev, info);
|
|
if (ret) {
|
|
rockchip_gpiolib_unregister(pdev, info);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct rockchip_pin_bank rk2928_pin_banks[] = {
|
|
PIN_BANK(0, 32, "gpio0"),
|
|
PIN_BANK(1, 32, "gpio1"),
|
|
PIN_BANK(2, 32, "gpio2"),
|
|
PIN_BANK(3, 32, "gpio3"),
|
|
};
|
|
|
|
static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
|
|
.pin_banks = rk2928_pin_banks,
|
|
.nr_banks = ARRAY_SIZE(rk2928_pin_banks),
|
|
.label = "RK2928-GPIO",
|
|
.type = RK2928,
|
|
.mux_offset = 0xa8,
|
|
.pull_calc_reg = rk2928_calc_pull_reg_and_bit,
|
|
};
|
|
|
|
static struct rockchip_pin_bank rk3066a_pin_banks[] = {
|
|
PIN_BANK(0, 32, "gpio0"),
|
|
PIN_BANK(1, 32, "gpio1"),
|
|
PIN_BANK(2, 32, "gpio2"),
|
|
PIN_BANK(3, 32, "gpio3"),
|
|
PIN_BANK(4, 32, "gpio4"),
|
|
PIN_BANK(6, 16, "gpio6"),
|
|
};
|
|
|
|
static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
|
|
.pin_banks = rk3066a_pin_banks,
|
|
.nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
|
|
.label = "RK3066a-GPIO",
|
|
.type = RK2928,
|
|
.mux_offset = 0xa8,
|
|
.pull_calc_reg = rk2928_calc_pull_reg_and_bit,
|
|
};
|
|
|
|
static struct rockchip_pin_bank rk3066b_pin_banks[] = {
|
|
PIN_BANK(0, 32, "gpio0"),
|
|
PIN_BANK(1, 32, "gpio1"),
|
|
PIN_BANK(2, 32, "gpio2"),
|
|
PIN_BANK(3, 32, "gpio3"),
|
|
};
|
|
|
|
static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
|
|
.pin_banks = rk3066b_pin_banks,
|
|
.nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
|
|
.label = "RK3066b-GPIO",
|
|
.type = RK3066B,
|
|
.mux_offset = 0x60,
|
|
};
|
|
|
|
static struct rockchip_pin_bank rk3188_pin_banks[] = {
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|
PIN_BANK(0, 32, "gpio0"),
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|
PIN_BANK(1, 32, "gpio1"),
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|
PIN_BANK(2, 32, "gpio2"),
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|
PIN_BANK(3, 32, "gpio3"),
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|
};
|
|
|
|
static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
|
|
.pin_banks = rk3188_pin_banks,
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|
.nr_banks = ARRAY_SIZE(rk3188_pin_banks),
|
|
.label = "RK3188-GPIO",
|
|
.type = RK3188,
|
|
.mux_offset = 0x68,
|
|
.pull_calc_reg = rk3188_calc_pull_reg_and_bit,
|
|
};
|
|
|
|
static const struct of_device_id rockchip_pinctrl_dt_match[] = {
|
|
{ .compatible = "rockchip,rk2928-pinctrl",
|
|
.data = (void *)&rk2928_pin_ctrl },
|
|
{ .compatible = "rockchip,rk3066a-pinctrl",
|
|
.data = (void *)&rk3066a_pin_ctrl },
|
|
{ .compatible = "rockchip,rk3066b-pinctrl",
|
|
.data = (void *)&rk3066b_pin_ctrl },
|
|
{ .compatible = "rockchip,rk3188-pinctrl",
|
|
.data = (void *)&rk3188_pin_ctrl },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
|
|
|
|
static struct platform_driver rockchip_pinctrl_driver = {
|
|
.probe = rockchip_pinctrl_probe,
|
|
.driver = {
|
|
.name = "rockchip-pinctrl",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = rockchip_pinctrl_dt_match,
|
|
},
|
|
};
|
|
|
|
static int __init rockchip_pinctrl_drv_register(void)
|
|
{
|
|
return platform_driver_register(&rockchip_pinctrl_driver);
|
|
}
|
|
postcore_initcall(rockchip_pinctrl_drv_register);
|
|
|
|
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
|
|
MODULE_DESCRIPTION("Rockchip pinctrl driver");
|
|
MODULE_LICENSE("GPL v2");
|