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linux/drivers/pinctrl/pinctrl-pistachio.c

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/*
* Pistachio SoC pinctrl driver
*
* Copyright (C) 2014 Imagination Technologies Ltd.
* Copyright (C) 2014 Google, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*/
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "pinctrl-utils.h"
#define PADS_SCHMITT_EN0 0x000
#define PADS_SCHMITT_EN_REG(pin) (PADS_SCHMITT_EN0 + 0x4 * ((pin) / 32))
#define PADS_SCHMITT_EN_BIT(pin) BIT((pin) % 32)
#define PADS_PU_PD0 0x040
#define PADS_PU_PD_REG(pin) (PADS_PU_PD0 + 0x4 * ((pin) / 16))
#define PADS_PU_PD_SHIFT(pin) (2 * ((pin) % 16))
#define PADS_PU_PD_MASK 0x3
#define PADS_PU_PD_HIGHZ 0x0
#define PADS_PU_PD_UP 0x1
#define PADS_PU_PD_DOWN 0x2
#define PADS_PU_PD_BUS 0x3
#define PADS_FUNCTION_SELECT0 0x0c0
#define PADS_FUNCTION_SELECT1 0x0c4
#define PADS_FUNCTION_SELECT2 0x0c8
#define PADS_SCENARIO_SELECT 0x0f8
#define PADS_SLEW_RATE0 0x100
#define PADS_SLEW_RATE_REG(pin) (PADS_SLEW_RATE0 + 0x4 * ((pin) / 32))
#define PADS_SLEW_RATE_BIT(pin) BIT((pin) % 32)
#define PADS_DRIVE_STRENGTH0 0x120
#define PADS_DRIVE_STRENGTH_REG(pin) \
(PADS_DRIVE_STRENGTH0 + 0x4 * ((pin) / 16))
#define PADS_DRIVE_STRENGTH_SHIFT(pin) (2 * ((pin) % 16))
#define PADS_DRIVE_STRENGTH_MASK 0x3
#define PADS_DRIVE_STRENGTH_2MA 0x0
#define PADS_DRIVE_STRENGTH_4MA 0x1
#define PADS_DRIVE_STRENGTH_8MA 0x2
#define PADS_DRIVE_STRENGTH_12MA 0x3
#define GPIO_BANK_BASE(bank) (0x200 + 0x24 * (bank))
#define GPIO_BIT_EN 0x00
#define GPIO_OUTPUT_EN 0x04
#define GPIO_OUTPUT 0x08
#define GPIO_INPUT 0x0c
#define GPIO_INPUT_POLARITY 0x10
#define GPIO_INTERRUPT_TYPE 0x14
#define GPIO_INTERRUPT_TYPE_LEVEL 0x0
#define GPIO_INTERRUPT_TYPE_EDGE 0x1
#define GPIO_INTERRUPT_EDGE 0x18
#define GPIO_INTERRUPT_EDGE_SINGLE 0x0
#define GPIO_INTERRUPT_EDGE_DUAL 0x1
#define GPIO_INTERRUPT_EN 0x1c
#define GPIO_INTERRUPT_STATUS 0x20
struct pistachio_function {
const char *name;
const char * const *groups;
unsigned int ngroups;
const int *scenarios;
unsigned int nscenarios;
unsigned int scenario_reg;
unsigned int scenario_shift;
unsigned int scenario_mask;
};
struct pistachio_pin_group {
const char *name;
unsigned int pin;
int mux_option[3];
int mux_reg;
int mux_shift;
int mux_mask;
};
struct pistachio_gpio_bank {
struct pistachio_pinctrl *pctl;
void __iomem *base;
unsigned int pin_base;
unsigned int npins;
struct gpio_chip gpio_chip;
struct irq_chip irq_chip;
};
struct pistachio_pinctrl {
struct device *dev;
void __iomem *base;
struct pinctrl_dev *pctldev;
const struct pinctrl_pin_desc *pins;
unsigned int npins;
const struct pistachio_function *functions;
unsigned int nfunctions;
const struct pistachio_pin_group *groups;
unsigned int ngroups;
struct pistachio_gpio_bank *gpio_banks;
unsigned int nbanks;
};
#define PISTACHIO_PIN_MFIO(p) (p)
#define PISTACHIO_PIN_TCK 90
#define PISTACHIO_PIN_TRSTN 91
#define PISTACHIO_PIN_TDI 92
#define PISTACHIO_PIN_TMS 93
#define PISTACHIO_PIN_TDO 94
#define PISTACHIO_PIN_JTAG_COMPLY 95
#define PISTACHIO_PIN_SAFE_MODE 96
#define PISTACHIO_PIN_POR_DISABLE 97
#define PISTACHIO_PIN_RESETN 98
#define MFIO_PIN_DESC(p) PINCTRL_PIN(PISTACHIO_PIN_MFIO(p), "mfio" #p)
static const struct pinctrl_pin_desc pistachio_pins[] = {
MFIO_PIN_DESC(0),
MFIO_PIN_DESC(1),
MFIO_PIN_DESC(2),
MFIO_PIN_DESC(3),
MFIO_PIN_DESC(4),
MFIO_PIN_DESC(5),
MFIO_PIN_DESC(6),
MFIO_PIN_DESC(7),
MFIO_PIN_DESC(8),
MFIO_PIN_DESC(9),
MFIO_PIN_DESC(10),
MFIO_PIN_DESC(11),
MFIO_PIN_DESC(12),
MFIO_PIN_DESC(13),
MFIO_PIN_DESC(14),
MFIO_PIN_DESC(15),
MFIO_PIN_DESC(16),
MFIO_PIN_DESC(17),
MFIO_PIN_DESC(18),
MFIO_PIN_DESC(19),
MFIO_PIN_DESC(20),
MFIO_PIN_DESC(21),
MFIO_PIN_DESC(22),
MFIO_PIN_DESC(23),
MFIO_PIN_DESC(24),
MFIO_PIN_DESC(25),
MFIO_PIN_DESC(26),
MFIO_PIN_DESC(27),
MFIO_PIN_DESC(28),
MFIO_PIN_DESC(29),
MFIO_PIN_DESC(30),
MFIO_PIN_DESC(31),
MFIO_PIN_DESC(32),
MFIO_PIN_DESC(33),
MFIO_PIN_DESC(34),
MFIO_PIN_DESC(35),
MFIO_PIN_DESC(36),
MFIO_PIN_DESC(37),
MFIO_PIN_DESC(38),
MFIO_PIN_DESC(39),
MFIO_PIN_DESC(40),
MFIO_PIN_DESC(41),
MFIO_PIN_DESC(42),
MFIO_PIN_DESC(43),
MFIO_PIN_DESC(44),
MFIO_PIN_DESC(45),
MFIO_PIN_DESC(46),
MFIO_PIN_DESC(47),
MFIO_PIN_DESC(48),
MFIO_PIN_DESC(49),
MFIO_PIN_DESC(50),
MFIO_PIN_DESC(51),
MFIO_PIN_DESC(52),
MFIO_PIN_DESC(53),
MFIO_PIN_DESC(54),
MFIO_PIN_DESC(55),
MFIO_PIN_DESC(56),
MFIO_PIN_DESC(57),
MFIO_PIN_DESC(58),
MFIO_PIN_DESC(59),
MFIO_PIN_DESC(60),
MFIO_PIN_DESC(61),
MFIO_PIN_DESC(62),
MFIO_PIN_DESC(63),
MFIO_PIN_DESC(64),
MFIO_PIN_DESC(65),
MFIO_PIN_DESC(66),
MFIO_PIN_DESC(67),
MFIO_PIN_DESC(68),
MFIO_PIN_DESC(69),
MFIO_PIN_DESC(70),
MFIO_PIN_DESC(71),
MFIO_PIN_DESC(72),
MFIO_PIN_DESC(73),
MFIO_PIN_DESC(74),
MFIO_PIN_DESC(75),
MFIO_PIN_DESC(76),
MFIO_PIN_DESC(77),
MFIO_PIN_DESC(78),
MFIO_PIN_DESC(79),
MFIO_PIN_DESC(80),
MFIO_PIN_DESC(81),
MFIO_PIN_DESC(82),
MFIO_PIN_DESC(83),
MFIO_PIN_DESC(84),
MFIO_PIN_DESC(85),
MFIO_PIN_DESC(86),
MFIO_PIN_DESC(87),
MFIO_PIN_DESC(88),
MFIO_PIN_DESC(89),
PINCTRL_PIN(PISTACHIO_PIN_TCK, "tck"),
PINCTRL_PIN(PISTACHIO_PIN_TRSTN, "trstn"),
PINCTRL_PIN(PISTACHIO_PIN_TDI, "tdi"),
PINCTRL_PIN(PISTACHIO_PIN_TMS, "tms"),
PINCTRL_PIN(PISTACHIO_PIN_TDO, "tdo"),
PINCTRL_PIN(PISTACHIO_PIN_JTAG_COMPLY, "jtag_comply"),
PINCTRL_PIN(PISTACHIO_PIN_SAFE_MODE, "safe_mode"),
PINCTRL_PIN(PISTACHIO_PIN_POR_DISABLE, "por_disable"),
PINCTRL_PIN(PISTACHIO_PIN_RESETN, "resetn"),
};
static const char * const pistachio_spim0_groups[] = {
"mfio1", "mfio2", "mfio8", "mfio9", "mfio10", "mfio28", "mfio29",
"mfio30", "mfio55", "mfio56", "mfio57",
};
static const char * const pistachio_spim1_groups[] = {
"mfio0", "mfio1", "mfio2", "mfio3", "mfio4", "mfio5", "mfio6",
"mfio7", "mfio31", "mfio55", "mfio56", "mfio57", "mfio58",
};
static const char * const pistachio_spis_groups[] = {
"mfio11", "mfio12", "mfio13", "mfio14",
};
static const char *const pistachio_sdhost_groups[] = {
"mfio15", "mfio16", "mfio17", "mfio18", "mfio19", "mfio20",
"mfio21", "mfio22", "mfio23", "mfio24", "mfio25", "mfio26",
"mfio27",
};
static const char * const pistachio_i2c0_groups[] = {
"mfio28", "mfio29",
};
static const char * const pistachio_i2c1_groups[] = {
"mfio30", "mfio31",
};
static const char * const pistachio_i2c2_groups[] = {
"mfio32", "mfio33",
};
static const char * const pistachio_i2c3_groups[] = {
"mfio34", "mfio35",
};
static const char * const pistachio_audio_clk_in_groups[] = {
"mfio36",
};
static const char * const pistachio_i2s_out_groups[] = {
"mfio36", "mfio37", "mfio38", "mfio39", "mfio40", "mfio41",
"mfio42", "mfio43", "mfio44",
};
static const char * const pistachio_debug_raw_cca_ind_groups[] = {
"mfio37",
};
static const char * const pistachio_debug_ed_sec20_cca_ind_groups[] = {
"mfio38",
};
static const char * const pistachio_debug_ed_sec40_cca_ind_groups[] = {
"mfio39",
};
static const char * const pistachio_debug_agc_done_0_groups[] = {
"mfio40",
};
static const char * const pistachio_debug_agc_done_1_groups[] = {
"mfio41",
};
static const char * const pistachio_debug_ed_cca_ind_groups[] = {
"mfio42",
};
static const char * const pistachio_debug_s2l_done_groups[] = {
"mfio43",
};
static const char * const pistachio_i2s_dac_clk_groups[] = {
"mfio45",
};
static const char * const pistachio_audio_sync_groups[] = {
"mfio45",
};
static const char * const pistachio_audio_trigger_groups[] = {
"mfio46",
};
static const char * const pistachio_i2s_in_groups[] = {
"mfio47", "mfio48", "mfio49", "mfio50", "mfio51", "mfio52",
"mfio53", "mfio54",
};
static const char * const pistachio_uart0_groups[] = {
"mfio55", "mfio56", "mfio57", "mfio58",
};
static const char * const pistachio_uart1_groups[] = {
"mfio59", "mfio60", "mfio1", "mfio2",
};
static const char * const pistachio_spdif_out_groups[] = {
"mfio61",
};
static const char * const pistachio_spdif_in_groups[] = {
"mfio62", "mfio54",
};
static const int pistachio_spdif_in_scenarios[] = {
PISTACHIO_PIN_MFIO(62),
PISTACHIO_PIN_MFIO(54),
};
static const char * const pistachio_eth_groups[] = {
"mfio63", "mfio64", "mfio65", "mfio66", "mfio67", "mfio68",
"mfio69", "mfio70", "mfio71",
};
static const char * const pistachio_ir_groups[] = {
"mfio72",
};
static const char * const pistachio_pwmpdm_groups[] = {
"mfio73", "mfio74", "mfio75", "mfio76",
};
static const char * const pistachio_mips_trace_clk_groups[] = {
"mfio15", "mfio63", "mfio73",
};
static const char * const pistachio_mips_trace_dint_groups[] = {
"mfio16", "mfio64", "mfio74",
};
static const int pistachio_mips_trace_dint_scenarios[] = {
PISTACHIO_PIN_MFIO(16),
PISTACHIO_PIN_MFIO(64),
PISTACHIO_PIN_MFIO(74),
};
static const char * const pistachio_mips_trace_trigout_groups[] = {
"mfio17", "mfio65", "mfio75",
};
static const char * const pistachio_mips_trace_trigin_groups[] = {
"mfio18", "mfio66", "mfio76",
};
static const int pistachio_mips_trace_trigin_scenarios[] = {
PISTACHIO_PIN_MFIO(18),
PISTACHIO_PIN_MFIO(66),
PISTACHIO_PIN_MFIO(76),
};
static const char * const pistachio_mips_trace_dm_groups[] = {
"mfio19", "mfio67", "mfio77",
};
static const char * const pistachio_mips_probe_n_groups[] = {
"mfio20", "mfio68", "mfio78",
};
static const int pistachio_mips_probe_n_scenarios[] = {
PISTACHIO_PIN_MFIO(20),
PISTACHIO_PIN_MFIO(68),
PISTACHIO_PIN_MFIO(78),
};
static const char * const pistachio_mips_trace_data_groups[] = {
"mfio15", "mfio16", "mfio17", "mfio18", "mfio19", "mfio20",
"mfio21", "mfio22", "mfio63", "mfio64", "mfio65", "mfio66",
"mfio67", "mfio68", "mfio69", "mfio70", "mfio79", "mfio80",
"mfio81", "mfio82", "mfio83", "mfio84", "mfio85", "mfio86",
};
static const char * const pistachio_sram_debug_groups[] = {
"mfio73", "mfio74",
};
static const char * const pistachio_rom_debug_groups[] = {
"mfio75", "mfio76",
};
static const char * const pistachio_rpu_debug_groups[] = {
"mfio77", "mfio78",
};
static const char * const pistachio_mips_debug_groups[] = {
"mfio79", "mfio80",
};
static const char * const pistachio_eth_debug_groups[] = {
"mfio81", "mfio82",
};
static const char * const pistachio_usb_debug_groups[] = {
"mfio83", "mfio84",
};
static const char * const pistachio_sdhost_debug_groups[] = {
"mfio85", "mfio86",
};
static const char * const pistachio_socif_debug_groups[] = {
"mfio87", "mfio88",
};
static const char * const pistachio_mdc_debug_groups[] = {
"mfio77", "mfio78",
};
static const char * const pistachio_ddr_debug_groups[] = {
"mfio79", "mfio80",
};
static const char * const pistachio_dreq0_groups[] = {
"mfio81",
};
static const char * const pistachio_dreq1_groups[] = {
"mfio82",
};
static const char * const pistachio_dreq2_groups[] = {
"mfio87",
};
static const char * const pistachio_dreq3_groups[] = {
"mfio88",
};
static const char * const pistachio_dreq4_groups[] = {
"mfio89",
};
static const char * const pistachio_dreq5_groups[] = {
"mfio89",
};
static const char * const pistachio_mips_pll_lock_groups[] = {
"mfio83",
};
static const char * const pistachio_audio_pll_lock_groups[] = {
"mfio84",
};
static const char * const pistachio_rpu_v_pll_lock_groups[] = {
"mfio85",
};
static const char * const pistachio_rpu_l_pll_lock_groups[] = {
"mfio86",
};
static const char * const pistachio_sys_pll_lock_groups[] = {
"mfio87",
};
static const char * const pistachio_wifi_pll_lock_groups[] = {
"mfio88",
};
static const char * const pistachio_bt_pll_lock_groups[] = {
"mfio89",
};
#define FUNCTION(_name) \
{ \
.name = #_name, \
.groups = pistachio_##_name##_groups, \
.ngroups = ARRAY_SIZE(pistachio_##_name##_groups), \
}
#define FUNCTION_SCENARIO(_name, _reg, _shift, _mask) \
{ \
.name = #_name, \
.groups = pistachio_##_name##_groups, \
.ngroups = ARRAY_SIZE(pistachio_##_name##_groups), \
.scenarios = pistachio_##_name##_scenarios, \
.nscenarios = ARRAY_SIZE(pistachio_##_name##_scenarios),\
.scenario_reg = _reg, \
.scenario_shift = _shift, \
.scenario_mask = _mask, \
}
enum pistachio_mux_option {
PISTACHIO_FUNCTION_NONE = -1,
PISTACHIO_FUNCTION_SPIM0,
PISTACHIO_FUNCTION_SPIM1,
PISTACHIO_FUNCTION_SPIS,
PISTACHIO_FUNCTION_SDHOST,
PISTACHIO_FUNCTION_I2C0,
PISTACHIO_FUNCTION_I2C1,
PISTACHIO_FUNCTION_I2C2,
PISTACHIO_FUNCTION_I2C3,
PISTACHIO_FUNCTION_AUDIO_CLK_IN,
PISTACHIO_FUNCTION_I2S_OUT,
PISTACHIO_FUNCTION_I2S_DAC_CLK,
PISTACHIO_FUNCTION_AUDIO_SYNC,
PISTACHIO_FUNCTION_AUDIO_TRIGGER,
PISTACHIO_FUNCTION_I2S_IN,
PISTACHIO_FUNCTION_UART0,
PISTACHIO_FUNCTION_UART1,
PISTACHIO_FUNCTION_SPDIF_OUT,
PISTACHIO_FUNCTION_SPDIF_IN,
PISTACHIO_FUNCTION_ETH,
PISTACHIO_FUNCTION_IR,
PISTACHIO_FUNCTION_PWMPDM,
PISTACHIO_FUNCTION_MIPS_TRACE_CLK,
PISTACHIO_FUNCTION_MIPS_TRACE_DINT,
PISTACHIO_FUNCTION_MIPS_TRACE_TRIGOUT,
PISTACHIO_FUNCTION_MIPS_TRACE_TRIGIN,
PISTACHIO_FUNCTION_MIPS_TRACE_DM,
PISTACHIO_FUNCTION_MIPS_TRACE_PROBE_N,
PISTACHIO_FUNCTION_MIPS_TRACE_DATA,
PISTACHIO_FUNCTION_SRAM_DEBUG,
PISTACHIO_FUNCTION_ROM_DEBUG,
PISTACHIO_FUNCTION_RPU_DEBUG,
PISTACHIO_FUNCTION_MIPS_DEBUG,
PISTACHIO_FUNCTION_ETH_DEBUG,
PISTACHIO_FUNCTION_USB_DEBUG,
PISTACHIO_FUNCTION_SDHOST_DEBUG,
PISTACHIO_FUNCTION_SOCIF_DEBUG,
PISTACHIO_FUNCTION_MDC_DEBUG,
PISTACHIO_FUNCTION_DDR_DEBUG,
PISTACHIO_FUNCTION_DREQ0,
PISTACHIO_FUNCTION_DREQ1,
PISTACHIO_FUNCTION_DREQ2,
PISTACHIO_FUNCTION_DREQ3,
PISTACHIO_FUNCTION_DREQ4,
PISTACHIO_FUNCTION_DREQ5,
PISTACHIO_FUNCTION_MIPS_PLL_LOCK,
PISTACHIO_FUNCTION_AUDIO_PLL_LOCK,
PISTACHIO_FUNCTION_RPU_V_PLL_LOCK,
PISTACHIO_FUNCTION_RPU_L_PLL_LOCK,
PISTACHIO_FUNCTION_SYS_PLL_LOCK,
PISTACHIO_FUNCTION_WIFI_PLL_LOCK,
PISTACHIO_FUNCTION_BT_PLL_LOCK,
PISTACHIO_FUNCTION_DEBUG_RAW_CCA_IND,
PISTACHIO_FUNCTION_DEBUG_ED_SEC20_CCA_IND,
PISTACHIO_FUNCTION_DEBUG_ED_SEC40_CCA_IND,
PISTACHIO_FUNCTION_DEBUG_AGC_DONE_0,
PISTACHIO_FUNCTION_DEBUG_AGC_DONE_1,
PISTACHIO_FUNCTION_DEBUG_ED_CCA_IND,
PISTACHIO_FUNCTION_DEBUG_S2L_DONE,
};
static const struct pistachio_function pistachio_functions[] = {
FUNCTION(spim0),
FUNCTION(spim1),
FUNCTION(spis),
FUNCTION(sdhost),
FUNCTION(i2c0),
FUNCTION(i2c1),
FUNCTION(i2c2),
FUNCTION(i2c3),
FUNCTION(audio_clk_in),
FUNCTION(i2s_out),
FUNCTION(i2s_dac_clk),
FUNCTION(audio_sync),
FUNCTION(audio_trigger),
FUNCTION(i2s_in),
FUNCTION(uart0),
FUNCTION(uart1),
FUNCTION(spdif_out),
FUNCTION_SCENARIO(spdif_in, PADS_SCENARIO_SELECT, 0, 0x1),
FUNCTION(eth),
FUNCTION(ir),
FUNCTION(pwmpdm),
FUNCTION(mips_trace_clk),
FUNCTION_SCENARIO(mips_trace_dint, PADS_SCENARIO_SELECT, 1, 0x3),
FUNCTION(mips_trace_trigout),
FUNCTION_SCENARIO(mips_trace_trigin, PADS_SCENARIO_SELECT, 3, 0x3),
FUNCTION(mips_trace_dm),
FUNCTION_SCENARIO(mips_probe_n, PADS_SCENARIO_SELECT, 5, 0x3),
FUNCTION(mips_trace_data),
FUNCTION(sram_debug),
FUNCTION(rom_debug),
FUNCTION(rpu_debug),
FUNCTION(mips_debug),
FUNCTION(eth_debug),
FUNCTION(usb_debug),
FUNCTION(sdhost_debug),
FUNCTION(socif_debug),
FUNCTION(mdc_debug),
FUNCTION(ddr_debug),
FUNCTION(dreq0),
FUNCTION(dreq1),
FUNCTION(dreq2),
FUNCTION(dreq3),
FUNCTION(dreq4),
FUNCTION(dreq5),
FUNCTION(mips_pll_lock),
FUNCTION(audio_pll_lock),
FUNCTION(rpu_v_pll_lock),
FUNCTION(rpu_l_pll_lock),
FUNCTION(sys_pll_lock),
FUNCTION(wifi_pll_lock),
FUNCTION(bt_pll_lock),
FUNCTION(debug_raw_cca_ind),
FUNCTION(debug_ed_sec20_cca_ind),
FUNCTION(debug_ed_sec40_cca_ind),
FUNCTION(debug_agc_done_0),
FUNCTION(debug_agc_done_1),
FUNCTION(debug_ed_cca_ind),
FUNCTION(debug_s2l_done),
};
#define PIN_GROUP(_pin, _name) \
{ \
.name = #_name, \
.pin = PISTACHIO_PIN_##_pin, \
.mux_option = { \
PISTACHIO_FUNCTION_NONE, \
PISTACHIO_FUNCTION_NONE, \
PISTACHIO_FUNCTION_NONE, \
}, \
.mux_reg = -1, \
.mux_shift = -1, \
.mux_mask = -1, \
}
#define MFIO_PIN_GROUP(_pin, _func) \
{ \
.name = "mfio" #_pin, \
.pin = PISTACHIO_PIN_MFIO(_pin), \
.mux_option = { \
PISTACHIO_FUNCTION_##_func, \
PISTACHIO_FUNCTION_NONE, \
PISTACHIO_FUNCTION_NONE, \
}, \
.mux_reg = -1, \
.mux_shift = -1, \
.mux_mask = -1, \
}
#define MFIO_MUX_PIN_GROUP(_pin, _f0, _f1, _f2, _reg, _shift, _mask) \
{ \
.name = "mfio" #_pin, \
.pin = PISTACHIO_PIN_MFIO(_pin), \
.mux_option = { \
PISTACHIO_FUNCTION_##_f0, \
PISTACHIO_FUNCTION_##_f1, \
PISTACHIO_FUNCTION_##_f2, \
}, \
.mux_reg = _reg, \
.mux_shift = _shift, \
.mux_mask = _mask, \
}
static const struct pistachio_pin_group pistachio_groups[] = {
MFIO_PIN_GROUP(0, SPIM1),
MFIO_MUX_PIN_GROUP(1, SPIM1, SPIM0, UART1,
PADS_FUNCTION_SELECT0, 0, 0x3),
MFIO_MUX_PIN_GROUP(2, SPIM1, SPIM0, UART1,
PADS_FUNCTION_SELECT0, 2, 0x3),
MFIO_PIN_GROUP(3, SPIM1),
MFIO_PIN_GROUP(4, SPIM1),
MFIO_PIN_GROUP(5, SPIM1),
MFIO_PIN_GROUP(6, SPIM1),
MFIO_PIN_GROUP(7, SPIM1),
MFIO_PIN_GROUP(8, SPIM0),
MFIO_PIN_GROUP(9, SPIM0),
MFIO_PIN_GROUP(10, SPIM0),
MFIO_PIN_GROUP(11, SPIS),
MFIO_PIN_GROUP(12, SPIS),
MFIO_PIN_GROUP(13, SPIS),
MFIO_PIN_GROUP(14, SPIS),
MFIO_MUX_PIN_GROUP(15, SDHOST, MIPS_TRACE_CLK, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 4, 0x3),
MFIO_MUX_PIN_GROUP(16, SDHOST, MIPS_TRACE_DINT, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 6, 0x3),
MFIO_MUX_PIN_GROUP(17, SDHOST, MIPS_TRACE_TRIGOUT, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 8, 0x3),
MFIO_MUX_PIN_GROUP(18, SDHOST, MIPS_TRACE_TRIGIN, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 10, 0x3),
MFIO_MUX_PIN_GROUP(19, SDHOST, MIPS_TRACE_DM, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 12, 0x3),
MFIO_MUX_PIN_GROUP(20, SDHOST, MIPS_TRACE_PROBE_N, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 14, 0x3),
MFIO_MUX_PIN_GROUP(21, SDHOST, NONE, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 16, 0x3),
MFIO_MUX_PIN_GROUP(22, SDHOST, NONE, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT0, 18, 0x3),
MFIO_PIN_GROUP(23, SDHOST),
MFIO_PIN_GROUP(24, SDHOST),
MFIO_PIN_GROUP(25, SDHOST),
MFIO_PIN_GROUP(26, SDHOST),
MFIO_PIN_GROUP(27, SDHOST),
MFIO_MUX_PIN_GROUP(28, I2C0, SPIM0, NONE,
PADS_FUNCTION_SELECT0, 20, 0x1),
MFIO_MUX_PIN_GROUP(29, I2C0, SPIM0, NONE,
PADS_FUNCTION_SELECT0, 21, 0x1),
MFIO_MUX_PIN_GROUP(30, I2C1, SPIM0, NONE,
PADS_FUNCTION_SELECT0, 22, 0x1),
MFIO_MUX_PIN_GROUP(31, I2C1, SPIM1, NONE,
PADS_FUNCTION_SELECT0, 23, 0x1),
MFIO_PIN_GROUP(32, I2C2),
MFIO_PIN_GROUP(33, I2C2),
MFIO_PIN_GROUP(34, I2C3),
MFIO_PIN_GROUP(35, I2C3),
MFIO_MUX_PIN_GROUP(36, I2S_OUT, AUDIO_CLK_IN, NONE,
PADS_FUNCTION_SELECT0, 24, 0x1),
MFIO_MUX_PIN_GROUP(37, I2S_OUT, DEBUG_RAW_CCA_IND, NONE,
PADS_FUNCTION_SELECT0, 25, 0x1),
MFIO_MUX_PIN_GROUP(38, I2S_OUT, DEBUG_ED_SEC20_CCA_IND, NONE,
PADS_FUNCTION_SELECT0, 26, 0x1),
MFIO_MUX_PIN_GROUP(39, I2S_OUT, DEBUG_ED_SEC40_CCA_IND, NONE,
PADS_FUNCTION_SELECT0, 27, 0x1),
MFIO_MUX_PIN_GROUP(40, I2S_OUT, DEBUG_AGC_DONE_0, NONE,
PADS_FUNCTION_SELECT0, 28, 0x1),
MFIO_MUX_PIN_GROUP(41, I2S_OUT, DEBUG_AGC_DONE_1, NONE,
PADS_FUNCTION_SELECT0, 29, 0x1),
MFIO_MUX_PIN_GROUP(42, I2S_OUT, DEBUG_ED_CCA_IND, NONE,
PADS_FUNCTION_SELECT0, 30, 0x1),
MFIO_MUX_PIN_GROUP(43, I2S_OUT, DEBUG_S2L_DONE, NONE,
PADS_FUNCTION_SELECT0, 31, 0x1),
MFIO_PIN_GROUP(44, I2S_OUT),
MFIO_MUX_PIN_GROUP(45, I2S_DAC_CLK, AUDIO_SYNC, NONE,
PADS_FUNCTION_SELECT1, 0, 0x1),
MFIO_PIN_GROUP(46, AUDIO_TRIGGER),
MFIO_PIN_GROUP(47, I2S_IN),
MFIO_PIN_GROUP(48, I2S_IN),
MFIO_PIN_GROUP(49, I2S_IN),
MFIO_PIN_GROUP(50, I2S_IN),
MFIO_PIN_GROUP(51, I2S_IN),
MFIO_PIN_GROUP(52, I2S_IN),
MFIO_PIN_GROUP(53, I2S_IN),
MFIO_MUX_PIN_GROUP(54, I2S_IN, NONE, SPDIF_IN,
PADS_FUNCTION_SELECT1, 1, 0x3),
MFIO_MUX_PIN_GROUP(55, UART0, SPIM0, SPIM1,
PADS_FUNCTION_SELECT1, 3, 0x3),
MFIO_MUX_PIN_GROUP(56, UART0, SPIM0, SPIM1,
PADS_FUNCTION_SELECT1, 5, 0x3),
MFIO_MUX_PIN_GROUP(57, UART0, SPIM0, SPIM1,
PADS_FUNCTION_SELECT1, 7, 0x3),
MFIO_MUX_PIN_GROUP(58, UART0, SPIM1, NONE,
PADS_FUNCTION_SELECT1, 9, 0x1),
MFIO_PIN_GROUP(59, UART1),
MFIO_PIN_GROUP(60, UART1),
MFIO_PIN_GROUP(61, SPDIF_OUT),
MFIO_PIN_GROUP(62, SPDIF_IN),
MFIO_MUX_PIN_GROUP(63, ETH, MIPS_TRACE_CLK, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 10, 0x3),
MFIO_MUX_PIN_GROUP(64, ETH, MIPS_TRACE_DINT, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 12, 0x3),
MFIO_MUX_PIN_GROUP(65, ETH, MIPS_TRACE_TRIGOUT, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 14, 0x3),
MFIO_MUX_PIN_GROUP(66, ETH, MIPS_TRACE_TRIGIN, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 16, 0x3),
MFIO_MUX_PIN_GROUP(67, ETH, MIPS_TRACE_DM, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 18, 0x3),
MFIO_MUX_PIN_GROUP(68, ETH, MIPS_TRACE_PROBE_N, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 20, 0x3),
MFIO_MUX_PIN_GROUP(69, ETH, NONE, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 22, 0x3),
MFIO_MUX_PIN_GROUP(70, ETH, NONE, MIPS_TRACE_DATA,
PADS_FUNCTION_SELECT1, 24, 0x3),
MFIO_PIN_GROUP(71, ETH),
MFIO_PIN_GROUP(72, IR),
MFIO_MUX_PIN_GROUP(73, PWMPDM, MIPS_TRACE_CLK, SRAM_DEBUG,
PADS_FUNCTION_SELECT1, 26, 0x3),
MFIO_MUX_PIN_GROUP(74, PWMPDM, MIPS_TRACE_DINT, SRAM_DEBUG,
PADS_FUNCTION_SELECT1, 28, 0x3),
MFIO_MUX_PIN_GROUP(75, PWMPDM, MIPS_TRACE_TRIGOUT, ROM_DEBUG,
PADS_FUNCTION_SELECT1, 30, 0x3),
MFIO_MUX_PIN_GROUP(76, PWMPDM, MIPS_TRACE_TRIGIN, ROM_DEBUG,
PADS_FUNCTION_SELECT2, 0, 0x3),
MFIO_MUX_PIN_GROUP(77, MDC_DEBUG, MIPS_TRACE_DM, RPU_DEBUG,
PADS_FUNCTION_SELECT2, 2, 0x3),
MFIO_MUX_PIN_GROUP(78, MDC_DEBUG, MIPS_TRACE_PROBE_N, RPU_DEBUG,
PADS_FUNCTION_SELECT2, 4, 0x3),
MFIO_MUX_PIN_GROUP(79, DDR_DEBUG, MIPS_TRACE_DATA, MIPS_DEBUG,
PADS_FUNCTION_SELECT2, 6, 0x3),
MFIO_MUX_PIN_GROUP(80, DDR_DEBUG, MIPS_TRACE_DATA, MIPS_DEBUG,
PADS_FUNCTION_SELECT2, 8, 0x3),
MFIO_MUX_PIN_GROUP(81, DREQ0, MIPS_TRACE_DATA, ETH_DEBUG,
PADS_FUNCTION_SELECT2, 10, 0x3),
MFIO_MUX_PIN_GROUP(82, DREQ1, MIPS_TRACE_DATA, ETH_DEBUG,
PADS_FUNCTION_SELECT2, 12, 0x3),
MFIO_MUX_PIN_GROUP(83, MIPS_PLL_LOCK, MIPS_TRACE_DATA, USB_DEBUG,
PADS_FUNCTION_SELECT2, 14, 0x3),
MFIO_MUX_PIN_GROUP(84, AUDIO_PLL_LOCK, MIPS_TRACE_DATA, USB_DEBUG,
PADS_FUNCTION_SELECT2, 16, 0x3),
MFIO_MUX_PIN_GROUP(85, RPU_V_PLL_LOCK, MIPS_TRACE_DATA, SDHOST_DEBUG,
PADS_FUNCTION_SELECT2, 18, 0x3),
MFIO_MUX_PIN_GROUP(86, RPU_L_PLL_LOCK, MIPS_TRACE_DATA, SDHOST_DEBUG,
PADS_FUNCTION_SELECT2, 20, 0x3),
MFIO_MUX_PIN_GROUP(87, SYS_PLL_LOCK, DREQ2, SOCIF_DEBUG,
PADS_FUNCTION_SELECT2, 22, 0x3),
MFIO_MUX_PIN_GROUP(88, WIFI_PLL_LOCK, DREQ3, SOCIF_DEBUG,
PADS_FUNCTION_SELECT2, 24, 0x3),
MFIO_MUX_PIN_GROUP(89, BT_PLL_LOCK, DREQ4, DREQ5,
PADS_FUNCTION_SELECT2, 26, 0x3),
PIN_GROUP(TCK, "tck"),
PIN_GROUP(TRSTN, "trstn"),
PIN_GROUP(TDI, "tdi"),
PIN_GROUP(TMS, "tms"),
PIN_GROUP(TDO, "tdo"),
PIN_GROUP(JTAG_COMPLY, "jtag_comply"),
PIN_GROUP(SAFE_MODE, "safe_mode"),
PIN_GROUP(POR_DISABLE, "por_disable"),
PIN_GROUP(RESETN, "resetn"),
};
static inline u32 pctl_readl(struct pistachio_pinctrl *pctl, u32 reg)
{
return readl(pctl->base + reg);
}
static inline void pctl_writel(struct pistachio_pinctrl *pctl, u32 val, u32 reg)
{
writel(val, pctl->base + reg);
}
static inline struct pistachio_gpio_bank *irqd_to_bank(struct irq_data *d)
{
return gpiochip_get_data(irq_data_get_irq_chip_data(d));
}
static inline u32 gpio_readl(struct pistachio_gpio_bank *bank, u32 reg)
{
return readl(bank->base + reg);
}
static inline void gpio_writel(struct pistachio_gpio_bank *bank, u32 val,
u32 reg)
{
writel(val, bank->base + reg);
}
static inline void gpio_mask_writel(struct pistachio_gpio_bank *bank,
u32 reg, unsigned int bit, u32 val)
{
/*
* For most of the GPIO registers, bit 16 + X must be set in order to
* write bit X.
*/
gpio_writel(bank, (0x10000 | val) << bit, reg);
}
static inline void gpio_enable(struct pistachio_gpio_bank *bank,
unsigned offset)
{
gpio_mask_writel(bank, GPIO_BIT_EN, offset, 1);
}
static inline void gpio_disable(struct pistachio_gpio_bank *bank,
unsigned offset)
{
gpio_mask_writel(bank, GPIO_BIT_EN, offset, 0);
}
static int pistachio_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->ngroups;
}
static const char *pistachio_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->groups[group].name;
}
static int pistachio_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*pins = &pctl->groups[group].pin;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops pistachio_pinctrl_ops = {
.get_groups_count = pistachio_pinctrl_get_groups_count,
.get_group_name = pistachio_pinctrl_get_group_name,
.get_group_pins = pistachio_pinctrl_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_free_map,
};
static int pistachio_pinmux_get_functions_count(struct pinctrl_dev *pctldev)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->nfunctions;
}
static const char *
pistachio_pinmux_get_function_name(struct pinctrl_dev *pctldev, unsigned func)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->functions[func].name;
}
static int pistachio_pinmux_get_function_groups(struct pinctrl_dev *pctldev,
unsigned func,
const char * const **groups,
unsigned * const num_groups)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctl->functions[func].groups;
*num_groups = pctl->functions[func].ngroups;
return 0;
}
static int pistachio_pinmux_enable(struct pinctrl_dev *pctldev,
unsigned func, unsigned group)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
const struct pistachio_pin_group *pg = &pctl->groups[group];
const struct pistachio_function *pf = &pctl->functions[func];
struct pinctrl_gpio_range *range;
unsigned int i;
u32 val;
if (pg->mux_reg > 0) {
for (i = 0; i < ARRAY_SIZE(pg->mux_option); i++) {
if (pg->mux_option[i] == func)
break;
}
if (i == ARRAY_SIZE(pg->mux_option)) {
dev_err(pctl->dev, "Cannot mux pin %u to function %u\n",
group, func);
return -EINVAL;
}
val = pctl_readl(pctl, pg->mux_reg);
val &= ~(pg->mux_mask << pg->mux_shift);
val |= i << pg->mux_shift;
pctl_writel(pctl, val, pg->mux_reg);
if (pf->scenarios) {
for (i = 0; i < pf->nscenarios; i++) {
if (pf->scenarios[i] == group)
break;
}
if (WARN_ON(i == pf->nscenarios))
return -EINVAL;
val = pctl_readl(pctl, pf->scenario_reg);
val &= ~(pf->scenario_mask << pf->scenario_shift);
val |= i << pf->scenario_shift;
pctl_writel(pctl, val, pf->scenario_reg);
}
}
range = pinctrl_find_gpio_range_from_pin(pctl->pctldev, pg->pin);
if (range)
gpio_disable(gpiochip_get_data(range->gc), pg->pin - range->pin_base);
return 0;
}
static const struct pinmux_ops pistachio_pinmux_ops = {
.get_functions_count = pistachio_pinmux_get_functions_count,
.get_function_name = pistachio_pinmux_get_function_name,
.get_function_groups = pistachio_pinmux_get_function_groups,
.set_mux = pistachio_pinmux_enable,
};
static int pistachio_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *config)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
u32 val, arg;
switch (param) {
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
val = pctl_readl(pctl, PADS_SCHMITT_EN_REG(pin));
arg = !!(val & PADS_SCHMITT_EN_BIT(pin));
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin)) >>
PADS_PU_PD_SHIFT(pin);
arg = (val & PADS_PU_PD_MASK) == PADS_PU_PD_HIGHZ;
break;
case PIN_CONFIG_BIAS_PULL_UP:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin)) >>
PADS_PU_PD_SHIFT(pin);
arg = (val & PADS_PU_PD_MASK) == PADS_PU_PD_UP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin)) >>
PADS_PU_PD_SHIFT(pin);
arg = (val & PADS_PU_PD_MASK) == PADS_PU_PD_DOWN;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin)) >>
PADS_PU_PD_SHIFT(pin);
arg = (val & PADS_PU_PD_MASK) == PADS_PU_PD_BUS;
break;
case PIN_CONFIG_SLEW_RATE:
val = pctl_readl(pctl, PADS_SLEW_RATE_REG(pin));
arg = !!(val & PADS_SLEW_RATE_BIT(pin));
break;
case PIN_CONFIG_DRIVE_STRENGTH:
val = pctl_readl(pctl, PADS_DRIVE_STRENGTH_REG(pin)) >>
PADS_DRIVE_STRENGTH_SHIFT(pin);
switch (val & PADS_DRIVE_STRENGTH_MASK) {
case PADS_DRIVE_STRENGTH_2MA:
arg = 2;
break;
case PADS_DRIVE_STRENGTH_4MA:
arg = 4;
break;
case PADS_DRIVE_STRENGTH_8MA:
arg = 8;
break;
case PADS_DRIVE_STRENGTH_12MA:
default:
arg = 12;
break;
}
break;
default:
dev_dbg(pctl->dev, "Property %u not supported\n", param);
return -ENOTSUPP;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int pistachio_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *configs, unsigned num_configs)
{
struct pistachio_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param;
u32 drv, val, arg;
unsigned int i;
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_INPUT_SCHMITT_ENABLE:
val = pctl_readl(pctl, PADS_SCHMITT_EN_REG(pin));
if (arg)
val |= PADS_SCHMITT_EN_BIT(pin);
else
val &= ~PADS_SCHMITT_EN_BIT(pin);
pctl_writel(pctl, val, PADS_SCHMITT_EN_REG(pin));
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin));
val &= ~(PADS_PU_PD_MASK << PADS_PU_PD_SHIFT(pin));
val |= PADS_PU_PD_HIGHZ << PADS_PU_PD_SHIFT(pin);
pctl_writel(pctl, val, PADS_PU_PD_REG(pin));
break;
case PIN_CONFIG_BIAS_PULL_UP:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin));
val &= ~(PADS_PU_PD_MASK << PADS_PU_PD_SHIFT(pin));
val |= PADS_PU_PD_UP << PADS_PU_PD_SHIFT(pin);
pctl_writel(pctl, val, PADS_PU_PD_REG(pin));
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin));
val &= ~(PADS_PU_PD_MASK << PADS_PU_PD_SHIFT(pin));
val |= PADS_PU_PD_DOWN << PADS_PU_PD_SHIFT(pin);
pctl_writel(pctl, val, PADS_PU_PD_REG(pin));
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
val = pctl_readl(pctl, PADS_PU_PD_REG(pin));
val &= ~(PADS_PU_PD_MASK << PADS_PU_PD_SHIFT(pin));
val |= PADS_PU_PD_BUS << PADS_PU_PD_SHIFT(pin);
pctl_writel(pctl, val, PADS_PU_PD_REG(pin));
break;
case PIN_CONFIG_SLEW_RATE:
val = pctl_readl(pctl, PADS_SLEW_RATE_REG(pin));
if (arg)
val |= PADS_SLEW_RATE_BIT(pin);
else
val &= ~PADS_SLEW_RATE_BIT(pin);
pctl_writel(pctl, val, PADS_SLEW_RATE_REG(pin));
break;
case PIN_CONFIG_DRIVE_STRENGTH:
val = pctl_readl(pctl, PADS_DRIVE_STRENGTH_REG(pin));
val &= ~(PADS_DRIVE_STRENGTH_MASK <<
PADS_DRIVE_STRENGTH_SHIFT(pin));
switch (arg) {
case 2:
drv = PADS_DRIVE_STRENGTH_2MA;
break;
case 4:
drv = PADS_DRIVE_STRENGTH_4MA;
break;
case 8:
drv = PADS_DRIVE_STRENGTH_8MA;
break;
case 12:
drv = PADS_DRIVE_STRENGTH_12MA;
break;
default:
dev_err(pctl->dev,
"Drive strength %umA not supported\n",
arg);
return -EINVAL;
}
val |= drv << PADS_DRIVE_STRENGTH_SHIFT(pin);
pctl_writel(pctl, val, PADS_DRIVE_STRENGTH_REG(pin));
break;
default:
dev_err(pctl->dev, "Property %u not supported\n",
param);
return -ENOTSUPP;
}
}
return 0;
}
static const struct pinconf_ops pistachio_pinconf_ops = {
.pin_config_get = pistachio_pinconf_get,
.pin_config_set = pistachio_pinconf_set,
.is_generic = true,
};
static struct pinctrl_desc pistachio_pinctrl_desc = {
.name = "pistachio-pinctrl",
.pctlops = &pistachio_pinctrl_ops,
.pmxops = &pistachio_pinmux_ops,
.confops = &pistachio_pinconf_ops,
};
static int pistachio_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
return !(gpio_readl(bank, GPIO_OUTPUT_EN) & BIT(offset));
}
static int pistachio_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
u32 reg;
if (gpio_readl(bank, GPIO_OUTPUT_EN) & BIT(offset))
reg = GPIO_OUTPUT;
else
reg = GPIO_INPUT;
return !!(gpio_readl(bank, reg) & BIT(offset));
}
static void pistachio_gpio_set(struct gpio_chip *chip, unsigned offset,
int value)
{
struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
gpio_mask_writel(bank, GPIO_OUTPUT, offset, !!value);
}
static int pistachio_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
gpio_mask_writel(bank, GPIO_OUTPUT_EN, offset, 0);
gpio_enable(bank, offset);
return 0;
}
static int pistachio_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
pistachio_gpio_set(chip, offset, value);
gpio_mask_writel(bank, GPIO_OUTPUT_EN, offset, 1);
gpio_enable(bank, offset);
return 0;
}
static void pistachio_gpio_irq_ack(struct irq_data *data)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
gpio_mask_writel(bank, GPIO_INTERRUPT_STATUS, data->hwirq, 0);
}
static void pistachio_gpio_irq_mask(struct irq_data *data)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
gpio_mask_writel(bank, GPIO_INTERRUPT_EN, data->hwirq, 0);
}
static void pistachio_gpio_irq_unmask(struct irq_data *data)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
gpio_mask_writel(bank, GPIO_INTERRUPT_EN, data->hwirq, 1);
}
static unsigned int pistachio_gpio_irq_startup(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
pistachio_gpio_direction_input(chip, data->hwirq);
pistachio_gpio_irq_unmask(data);
return 0;
}
static int pistachio_gpio_irq_set_type(struct irq_data *data, unsigned int type)
{
struct pistachio_gpio_bank *bank = irqd_to_bank(data);
switch (type & IRQ_TYPE_SENSE_MASK) {
case IRQ_TYPE_EDGE_RISING:
gpio_mask_writel(bank, GPIO_INPUT_POLARITY, data->hwirq, 1);
gpio_mask_writel(bank, GPIO_INTERRUPT_TYPE, data->hwirq,
GPIO_INTERRUPT_TYPE_EDGE);
gpio_mask_writel(bank, GPIO_INTERRUPT_EDGE, data->hwirq,
GPIO_INTERRUPT_EDGE_SINGLE);
break;
case IRQ_TYPE_EDGE_FALLING:
gpio_mask_writel(bank, GPIO_INPUT_POLARITY, data->hwirq, 0);
gpio_mask_writel(bank, GPIO_INTERRUPT_TYPE, data->hwirq,
GPIO_INTERRUPT_TYPE_EDGE);
gpio_mask_writel(bank, GPIO_INTERRUPT_EDGE, data->hwirq,
GPIO_INTERRUPT_EDGE_SINGLE);
break;
case IRQ_TYPE_EDGE_BOTH:
gpio_mask_writel(bank, GPIO_INTERRUPT_TYPE, data->hwirq,
GPIO_INTERRUPT_TYPE_EDGE);
gpio_mask_writel(bank, GPIO_INTERRUPT_EDGE, data->hwirq,
GPIO_INTERRUPT_EDGE_DUAL);
break;
case IRQ_TYPE_LEVEL_HIGH:
gpio_mask_writel(bank, GPIO_INPUT_POLARITY, data->hwirq, 1);
gpio_mask_writel(bank, GPIO_INTERRUPT_TYPE, data->hwirq,
GPIO_INTERRUPT_TYPE_LEVEL);
break;
case IRQ_TYPE_LEVEL_LOW:
gpio_mask_writel(bank, GPIO_INPUT_POLARITY, data->hwirq, 0);
gpio_mask_writel(bank, GPIO_INTERRUPT_TYPE, data->hwirq,
GPIO_INTERRUPT_TYPE_LEVEL);
break;
default:
return -EINVAL;
}
if (type & IRQ_TYPE_LEVEL_MASK)
irq_set_handler_locked(data, handle_level_irq);
else
irq_set_handler_locked(data, handle_edge_irq);
return 0;
}
static void pistachio_gpio_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct pistachio_gpio_bank *bank = gpiochip_get_data(gc);
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long pending;
unsigned int pin;
chained_irq_enter(chip, desc);
pending = gpio_readl(bank, GPIO_INTERRUPT_STATUS) &
gpio_readl(bank, GPIO_INTERRUPT_EN);
for_each_set_bit(pin, &pending, 16)
generic_handle_irq(irq_linear_revmap(gc->irq.domain, pin));
chained_irq_exit(chip, desc);
}
#define GPIO_BANK(_bank, _pin_base, _npins) \
{ \
.pin_base = _pin_base, \
.npins = _npins, \
.gpio_chip = { \
.label = "GPIO" #_bank, \
.request = gpiochip_generic_request, \
.free = gpiochip_generic_free, \
.get_direction = pistachio_gpio_get_direction, \
.direction_input = pistachio_gpio_direction_input, \
.direction_output = pistachio_gpio_direction_output, \
.get = pistachio_gpio_get, \
.set = pistachio_gpio_set, \
.base = _pin_base, \
.ngpio = _npins, \
}, \
.irq_chip = { \
.name = "GPIO" #_bank, \
.irq_startup = pistachio_gpio_irq_startup, \
.irq_ack = pistachio_gpio_irq_ack, \
.irq_mask = pistachio_gpio_irq_mask, \
.irq_unmask = pistachio_gpio_irq_unmask, \
.irq_set_type = pistachio_gpio_irq_set_type, \
}, \
}
static struct pistachio_gpio_bank pistachio_gpio_banks[] = {
GPIO_BANK(0, PISTACHIO_PIN_MFIO(0), 16),
GPIO_BANK(1, PISTACHIO_PIN_MFIO(16), 16),
GPIO_BANK(2, PISTACHIO_PIN_MFIO(32), 16),
GPIO_BANK(3, PISTACHIO_PIN_MFIO(48), 16),
GPIO_BANK(4, PISTACHIO_PIN_MFIO(64), 16),
GPIO_BANK(5, PISTACHIO_PIN_MFIO(80), 10),
};
static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
{
struct device_node *node = pctl->dev->of_node;
struct pistachio_gpio_bank *bank;
unsigned int i;
int irq, ret = 0;
for (i = 0; i < pctl->nbanks; i++) {
char child_name[sizeof("gpioXX")];
struct device_node *child;
snprintf(child_name, sizeof(child_name), "gpio%d", i);
child = of_get_child_by_name(node, child_name);
if (!child) {
dev_err(pctl->dev, "No node for bank %u\n", i);
ret = -ENODEV;
goto err;
}
if (!of_find_property(child, "gpio-controller", NULL)) {
dev_err(pctl->dev,
"No gpio-controller property for bank %u\n", i);
of_node_put(child);
ret = -ENODEV;
goto err;
}
irq = irq_of_parse_and_map(child, 0);
if (irq < 0) {
dev_err(pctl->dev, "No IRQ for bank %u: %d\n", i, irq);
of_node_put(child);
ret = irq;
goto err;
}
bank = &pctl->gpio_banks[i];
bank->pctl = pctl;
bank->base = pctl->base + GPIO_BANK_BASE(i);
bank->gpio_chip.parent = pctl->dev;
bank->gpio_chip.of_node = child;
ret = gpiochip_add_data(&bank->gpio_chip, bank);
if (ret < 0) {
dev_err(pctl->dev, "Failed to add GPIO chip %u: %d\n",
i, ret);
goto err;
}
ret = gpiochip_irqchip_add(&bank->gpio_chip, &bank->irq_chip,
0, handle_level_irq, IRQ_TYPE_NONE);
if (ret < 0) {
dev_err(pctl->dev, "Failed to add IRQ chip %u: %d\n",
i, ret);
gpiochip_remove(&bank->gpio_chip);
goto err;
}
gpiochip_set_chained_irqchip(&bank->gpio_chip, &bank->irq_chip,
irq, pistachio_gpio_irq_handler);
ret = gpiochip_add_pin_range(&bank->gpio_chip,
dev_name(pctl->dev), 0,
bank->pin_base, bank->npins);
if (ret < 0) {
dev_err(pctl->dev, "Failed to add GPIO range %u: %d\n",
i, ret);
gpiochip_remove(&bank->gpio_chip);
goto err;
}
}
return 0;
err:
for (; i > 0; i--) {
bank = &pctl->gpio_banks[i - 1];
gpiochip_remove(&bank->gpio_chip);
}
return ret;
}
static const struct of_device_id pistachio_pinctrl_of_match[] = {
{ .compatible = "img,pistachio-system-pinctrl", },
{ },
};
static int pistachio_pinctrl_probe(struct platform_device *pdev)
{
struct pistachio_pinctrl *pctl;
struct resource *res;
pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
if (!pctl)
return -ENOMEM;
pctl->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, pctl);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pctl->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pctl->base))
return PTR_ERR(pctl->base);
pctl->pins = pistachio_pins;
pctl->npins = ARRAY_SIZE(pistachio_pins);
pctl->functions = pistachio_functions;
pctl->nfunctions = ARRAY_SIZE(pistachio_functions);
pctl->groups = pistachio_groups;
pctl->ngroups = ARRAY_SIZE(pistachio_groups);
pctl->gpio_banks = pistachio_gpio_banks;
pctl->nbanks = ARRAY_SIZE(pistachio_gpio_banks);
pistachio_pinctrl_desc.pins = pctl->pins;
pistachio_pinctrl_desc.npins = pctl->npins;
pctl->pctldev = devm_pinctrl_register(&pdev->dev, &pistachio_pinctrl_desc,
pctl);
if (IS_ERR(pctl->pctldev)) {
dev_err(&pdev->dev, "Failed to register pinctrl device\n");
return PTR_ERR(pctl->pctldev);
}
return pistachio_gpio_register(pctl);
}
static struct platform_driver pistachio_pinctrl_driver = {
.driver = {
.name = "pistachio-pinctrl",
.of_match_table = pistachio_pinctrl_of_match,
.suppress_bind_attrs = true,
},
.probe = pistachio_pinctrl_probe,
};
static int __init pistachio_pinctrl_register(void)
{
return platform_driver_register(&pistachio_pinctrl_driver);
}
arch_initcall(pistachio_pinctrl_register);
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