drivers/pinctrl/starfive/pinctrl-starfive-jh7110-aon.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Pinctrl / GPIO driver for StarFive JH7110 SoC aon controller
   4  *
   5  * Copyright (C) 2022 StarFive Technology Co., Ltd.
   6  */
   7
   8 #include <linux/err.h>
   9 #include <linux/gpio/driver.h>
  10 #include <linux/init.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/io.h>
  13 #include <linux/mod_devicetable.h>
  14 #include <linux/module.h>
  15 #include <linux/pinctrl/pinconf.h>
  16 #include <linux/pinctrl/pinconf-generic.h>
  17 #include <linux/pinctrl/pinctrl.h>
  18 #include <linux/pinctrl/pinmux.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23
  24 #include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
  25
  26 #include "../core.h"
  27 #include "../pinconf.h"
  28 #include "../pinmux.h"
  29 #include "pinctrl-starfive-jh7110.h"
  30
  31 #define JH7110_AON_NGPIO                4
  32 #define JH7110_AON_GC_BASE              64
  33
  34 #define JH7110_AON_REGS_NUM             37
  35
  36 /* registers */
  37 #define JH7110_AON_DOEN                 0x0
  38 #define JH7110_AON_DOUT                 0x4
  39 #define JH7110_AON_GPI                  0x8
  40 #define JH7110_AON_GPIOIN               0x2c
  41
  42 #define JH7110_AON_GPIOEN               0xc
  43 #define JH7110_AON_GPIOIS               0x10
  44 #define JH7110_AON_GPIOIC               0x14
  45 #define JH7110_AON_GPIOIBE              0x18
  46 #define JH7110_AON_GPIOIEV              0x1c
  47 #define JH7110_AON_GPIOIE               0x20
  48 #define JH7110_AON_GPIORIS              0x28
  49 #define JH7110_AON_GPIOMIS              0x28
  50
  51 #define JH7110_AON_GPO_PDA_0_5_CFG      0x30
  52
  53 static const struct pinctrl_pin_desc jh7110_aon_pins[] = {
  54         PINCTRL_PIN(PAD_TESTEN,         "TESTEN"),
  55         PINCTRL_PIN(PAD_RGPIO0,         "RGPIO0"),
  56         PINCTRL_PIN(PAD_RGPIO1,         "RGPIO1"),
  57         PINCTRL_PIN(PAD_RGPIO2,         "RGPIO2"),
  58         PINCTRL_PIN(PAD_RGPIO3,         "RGPIO3"),
  59         PINCTRL_PIN(PAD_RSTN,           "RSTN"),
  60         PINCTRL_PIN(PAD_GMAC0_MDC,      "GMAC0_MDC"),
  61         PINCTRL_PIN(PAD_GMAC0_MDIO,     "GMAC0_MDIO"),
  62         PINCTRL_PIN(PAD_GMAC0_RXD0,     "GMAC0_RXD0"),
  63         PINCTRL_PIN(PAD_GMAC0_RXD1,     "GMAC0_RXD1"),
  64         PINCTRL_PIN(PAD_GMAC0_RXD2,     "GMAC0_RXD2"),
  65         PINCTRL_PIN(PAD_GMAC0_RXD3,     "GMAC0_RXD3"),
  66         PINCTRL_PIN(PAD_GMAC0_RXDV,     "GMAC0_RXDV"),
  67         PINCTRL_PIN(PAD_GMAC0_RXC,      "GMAC0_RXC"),
  68         PINCTRL_PIN(PAD_GMAC0_TXD0,     "GMAC0_TXD0"),
  69         PINCTRL_PIN(PAD_GMAC0_TXD1,     "GMAC0_TXD1"),
  70         PINCTRL_PIN(PAD_GMAC0_TXD2,     "GMAC0_TXD2"),
  71         PINCTRL_PIN(PAD_GMAC0_TXD3,     "GMAC0_TXD3"),
  72         PINCTRL_PIN(PAD_GMAC0_TXEN,     "GMAC0_TXEN"),
  73         PINCTRL_PIN(PAD_GMAC0_TXC,      "GMAC0_TXC"),
  74 };
  75
  76 static int jh7110_aon_set_one_pin_mux(struct jh7110_pinctrl *sfp,
  77                                       unsigned int pin,
  78                                       unsigned int din, u32 dout,
  79                                       u32 doen, u32 func)
  80 {
  81         if (pin < sfp->gc.ngpio && func == 0)
  82                 jh7110_set_gpiomux(sfp, pin, din, dout, doen);
  83
  84         return 0;
  85 }
  86
  87 static int jh7110_aon_get_padcfg_base(struct jh7110_pinctrl *sfp,
  88                                       unsigned int pin)
  89 {
  90         if (pin < PAD_GMAC0_MDC)
  91                 return JH7110_AON_GPO_PDA_0_5_CFG;
  92
  93         return -1;
  94 }
  95
  96 static void jh7110_aon_irq_handler(struct irq_desc *desc)
  97 {
  98         struct jh7110_pinctrl *sfp = jh7110_from_irq_desc(desc);
  99         struct irq_chip *chip = irq_desc_get_chip(desc);
 100         unsigned long mis;
 101         unsigned int pin;
 102
 103         chained_irq_enter(chip, desc);
 104
 105         mis = readl_relaxed(sfp->base + JH7110_AON_GPIOMIS);
 106         for_each_set_bit(pin, &mis, JH7110_AON_NGPIO)
 107                 generic_handle_domain_irq(sfp->gc.irq.domain, pin);
 108
 109         chained_irq_exit(chip, desc);
 110 }
 111
 112 static int jh7110_aon_init_hw(struct gpio_chip *gc)
 113 {
 114         struct jh7110_pinctrl *sfp = container_of(gc,
 115                         struct jh7110_pinctrl, gc);
 116
 117         /* mask all GPIO interrupts */
 118         writel_relaxed(0, sfp->base + JH7110_AON_GPIOIE);
 119         /* clear edge interrupt flags */
 120         writel_relaxed(0, sfp->base + JH7110_AON_GPIOIC);
 121         writel_relaxed(0x0f, sfp->base + JH7110_AON_GPIOIC);
 122         /* enable GPIO interrupts */
 123         writel_relaxed(1, sfp->base + JH7110_AON_GPIOEN);
 124         return 0;
 125 }
 126
 127 static const struct jh7110_gpio_irq_reg jh7110_aon_irq_reg = {
 128         .is_reg_base    = JH7110_AON_GPIOIS,
 129         .ic_reg_base    = JH7110_AON_GPIOIC,
 130         .ibe_reg_base   = JH7110_AON_GPIOIBE,
 131         .iev_reg_base   = JH7110_AON_GPIOIEV,
 132         .ie_reg_base    = JH7110_AON_GPIOIE,
 133         .ris_reg_base   = JH7110_AON_GPIORIS,
 134         .mis_reg_base   = JH7110_AON_GPIOMIS,
 135 };
 136
 137 static const struct jh7110_pinctrl_soc_info jh7110_aon_pinctrl_info = {
 138         .pins           = jh7110_aon_pins,
 139         .npins          = ARRAY_SIZE(jh7110_aon_pins),
 140         .ngpios         = JH7110_AON_NGPIO,
 141         .gc_base        = JH7110_AON_GC_BASE,
 142         .dout_reg_base  = JH7110_AON_DOUT,
 143         .dout_mask      = GENMASK(3, 0),
 144         .doen_reg_base  = JH7110_AON_DOEN,
 145         .doen_mask      = GENMASK(2, 0),
 146         .gpi_reg_base   = JH7110_AON_GPI,
 147         .gpi_mask       = GENMASK(3, 0),
 148         .gpioin_reg_base           = JH7110_AON_GPIOIN,
 149         .irq_reg                   = &jh7110_aon_irq_reg,
 150         .nsaved_regs               = JH7110_AON_REGS_NUM,
 151         .jh7110_set_one_pin_mux  = jh7110_aon_set_one_pin_mux,
 152         .jh7110_get_padcfg_base  = jh7110_aon_get_padcfg_base,
 153         .jh7110_gpio_irq_handler = jh7110_aon_irq_handler,
 154         .jh7110_gpio_init_hw     = jh7110_aon_init_hw,
 155 };
 156
 157 static const struct of_device_id jh7110_aon_pinctrl_of_match[] = {
 158         {
 159                 .compatible = "starfive,jh7110-aon-pinctrl",
 160                 .data = &jh7110_aon_pinctrl_info,
 161         },
 162         { /* sentinel */ }
 163 };
 164 MODULE_DEVICE_TABLE(of, jh7110_aon_pinctrl_of_match);
 165
 166 static struct platform_driver jh7110_aon_pinctrl_driver = {
 167         .probe = jh7110_pinctrl_probe,
 168         .driver = {
 169                 .name = "starfive-jh7110-aon-pinctrl",
 170                 .of_match_table = jh7110_aon_pinctrl_of_match,
 171                 .pm = pm_sleep_ptr(&jh7110_pinctrl_pm_ops),
 172         },
 173 };
 174 module_platform_driver(jh7110_aon_pinctrl_driver);
 175
 176 MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC aon controller");
 177 MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
 178 MODULE_LICENSE("GPL");