Code refactoring for existing rk_gpio driver.

It supports gpio type checking. Depending on gpio type some
register addresses are different.

Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D36262
This commit is contained in:
Søren Schmidt 2022-08-19 13:22:01 +00:00 committed by Ganbold Tsagaankhuu
parent c780d3ad7b
commit 901df07a47

View File

@ -2,6 +2,7 @@
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
* Copyright (c) 2021 Soren Schmidt <sos@deepcore.dk>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -53,20 +54,21 @@ __FBSDID("$FreeBSD$");
#include "fdt_pinctrl_if.h"
#define RK_GPIO_SWPORTA_DR 0x00 /* Data register */
#define RK_GPIO_SWPORTA_DDR 0x04 /* Data direction register */
#define RK_GPIO_INTEN 0x30 /* Interrupt enable register */
#define RK_GPIO_INTMASK 0x34 /* Interrupt mask register */
#define RK_GPIO_INTTYPE_LEVEL 0x38 /* Interrupt level register */
#define RK_GPIO_INT_POLARITY 0x3C /* Interrupt polarity register */
#define RK_GPIO_INT_STATUS 0x40 /* Interrupt status register */
#define RK_GPIO_INT_RAWSTATUS 0x44 /* Raw Interrupt status register */
#define RK_GPIO_DEBOUNCE 0x48 /* Debounce enable register */
#define RK_GPIO_PORTA_EOI 0x4C /* Clear interrupt register */
#define RK_GPIO_EXT_PORTA 0x50 /* External port register */
enum gpio_regs {
RK_GPIO_SWPORTA_DR = 1, /* Data register */
RK_GPIO_SWPORTA_DDR, /* Data direction register */
RK_GPIO_INTEN, /* Interrupt enable register */
RK_GPIO_INTMASK, /* Interrupt mask register */
RK_GPIO_INTTYPE_LEVEL, /* Interrupt level register */
RK_GPIO_INTTYPE_BOTH, /* Both rise and falling edge */
RK_GPIO_INT_POLARITY, /* Interrupt polarity register */
RK_GPIO_INT_STATUS, /* Interrupt status register */
RK_GPIO_INT_RAWSTATUS, /* Raw Interrupt status register */
RK_GPIO_DEBOUNCE, /* Debounce enable register */
RK_GPIO_PORTA_EOI, /* Clear interrupt register */
RK_GPIO_EXT_PORTA, /* External port register */
RK_GPIO_REGNUM
};
#define RK_GPIO_LS_SYNC 0x60 /* Level sensitive syncronization enable register */
@ -92,7 +94,9 @@ struct rk_gpio_softc {
device_t pinctrl;
uint32_t swporta;
uint32_t swporta_ddr;
uint32_t version;
struct pin_cached pin_cached[RK_GPIO_MAX_PINS];
uint8_t regs[RK_GPIO_REGNUM];
};
static struct ofw_compat_data compat_data[] = {
@ -106,6 +110,10 @@ static struct resource_spec rk_gpio_spec[] = {
{ -1, 0 }
};
#define RK_GPIO_VERSION 0x78
#define RK_GPIO_TYPE_V1 0x00000000
#define RK_GPIO_TYPE_V2 0x01000c2b
static int rk_gpio_detach(device_t dev);
#define RK_GPIO_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx)
@ -117,6 +125,49 @@ static int rk_gpio_detach(device_t dev);
#define RK_GPIO_READ(_sc, _off) \
bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off)
static int
rk_gpio_read_bit(struct rk_gpio_softc *sc, int reg, int bit)
{
int offset = sc->regs[reg];
uint32_t value;
if (sc->version == RK_GPIO_TYPE_V1) {
value = RK_GPIO_READ(sc, offset);
value >>= bit;
} else {
value = RK_GPIO_READ(sc, bit > 15 ? offset + 4 : offset);
value >>= (bit % 16);
}
return (value & 1);
}
static uint32_t
rk_gpio_read_4(struct rk_gpio_softc *sc, int reg)
{
int offset = sc->regs[reg];
uint32_t value;
if (sc->version == RK_GPIO_TYPE_V1)
value = RK_GPIO_READ(sc, offset);
else
value = (RK_GPIO_READ(sc, offset) & 0xffff) |
(RK_GPIO_READ(sc, offset + 4) << 16);
return (value);
}
static void
rk_gpio_write_4(struct rk_gpio_softc *sc, int reg, uint32_t value)
{
int offset = sc->regs[reg];
if (sc->version == RK_GPIO_TYPE_V1)
RK_GPIO_WRITE(sc, offset, value);
else {
RK_GPIO_WRITE(sc, offset, (value & 0xffff) | 0xffff0000);
RK_GPIO_WRITE(sc, offset + 4, (value >> 16) | 0xffff0000);
}
}
static int
rk_gpio_probe(device_t dev)
{
@ -170,6 +221,43 @@ rk_gpio_attach(device_t dev)
rk_gpio_detach(dev);
return (ENXIO);
}
RK_GPIO_LOCK(sc);
sc->version = rk_gpio_read_4(sc, RK_GPIO_VERSION);
RK_GPIO_UNLOCK(sc);
switch (sc->version) {
case RK_GPIO_TYPE_V1:
sc->regs[RK_GPIO_SWPORTA_DR] = 0x00;
sc->regs[RK_GPIO_SWPORTA_DDR] = 0x04;
sc->regs[RK_GPIO_INTEN] = 0x30;
sc->regs[RK_GPIO_INTMASK] = 0x34;
sc->regs[RK_GPIO_INTTYPE_LEVEL] = 0x38;
sc->regs[RK_GPIO_INT_POLARITY] = 0x3c;
sc->regs[RK_GPIO_INT_STATUS] = 0x40;
sc->regs[RK_GPIO_INT_RAWSTATUS] = 0x44;
sc->regs[RK_GPIO_DEBOUNCE] = 0x48;
sc->regs[RK_GPIO_PORTA_EOI] = 0x4c;
sc->regs[RK_GPIO_EXT_PORTA] = 0x50;
break;
case RK_GPIO_TYPE_V2:
sc->regs[RK_GPIO_SWPORTA_DR] = 0x00;
sc->regs[RK_GPIO_SWPORTA_DDR] = 0x08;
sc->regs[RK_GPIO_INTEN] = 0x10;
sc->regs[RK_GPIO_INTMASK] = 0x18;
sc->regs[RK_GPIO_INTTYPE_LEVEL] = 0x20;
sc->regs[RK_GPIO_INTTYPE_BOTH] = 0x30;
sc->regs[RK_GPIO_INT_POLARITY] = 0x28;
sc->regs[RK_GPIO_INT_STATUS] = 0x50;
sc->regs[RK_GPIO_INT_RAWSTATUS] = 0x58;
sc->regs[RK_GPIO_DEBOUNCE] = 0x38;
sc->regs[RK_GPIO_PORTA_EOI] = 0x60;
sc->regs[RK_GPIO_EXT_PORTA] = 0x70;
break;
default:
device_printf(dev, "Unknown gpio version %08x\n", sc->version);
rk_gpio_detach(dev);
return (ENXIO);
}
sc->sc_busdev = gpiobus_attach_bus(dev);
if (sc->sc_busdev == NULL) {
@ -182,8 +270,8 @@ rk_gpio_attach(device_t dev)
sc->pin_cached[i].is_gpio = 2;
RK_GPIO_LOCK(sc);
sc->swporta = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DR);
sc->swporta_ddr = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DDR);
sc->swporta = rk_gpio_read_4(sc, RK_GPIO_SWPORTA_DR);
sc->swporta_ddr = rk_gpio_read_4(sc, RK_GPIO_SWPORTA_DDR);
RK_GPIO_UNLOCK(sc);
return (0);
@ -260,7 +348,6 @@ rk_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
if (sc->pin_cached[pin].is_gpio == 0)
return (EINVAL);
}
*flags = 0;
rv = FDT_PINCTRL_GET_FLAGS(sc->pinctrl, dev, pin, flags);
if (rv != 0)
@ -279,6 +366,9 @@ static int
rk_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
{
if (pin >= RK_GPIO_MAX_PINS)
return EINVAL;
*caps = RK_GPIO_DEFAULT_CAPS;
return (0);
}
@ -291,6 +381,9 @@ rk_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
sc = device_get_softc(dev);
if (pin >= RK_GPIO_MAX_PINS)
return (EINVAL);
if (__predict_false(sc->pin_cached[pin].is_gpio != 1)) {
rv = FDT_PINCTRL_IS_GPIO(sc->pinctrl, dev, pin, (bool *)&sc->pin_cached[pin].is_gpio);
if (rv != 0)
@ -312,7 +405,7 @@ rk_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
else if (flags & GPIO_PIN_OUTPUT)
sc->swporta_ddr |= (1 << pin);
RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DDR, sc->swporta_ddr);
rk_gpio_write_4(sc, RK_GPIO_SWPORTA_DDR, sc->swporta_ddr);
RK_GPIO_UNLOCK(sc);
return (0);
@ -322,15 +415,15 @@ static int
rk_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val)
{
struct rk_gpio_softc *sc;
uint32_t reg;
sc = device_get_softc(dev);
RK_GPIO_LOCK(sc);
reg = RK_GPIO_READ(sc, RK_GPIO_EXT_PORTA);
RK_GPIO_UNLOCK(sc);
if (pin >= RK_GPIO_MAX_PINS)
return (EINVAL);
*val = reg & (1 << pin) ? 1 : 0;
RK_GPIO_LOCK(sc);
*val = rk_gpio_read_bit(sc, RK_GPIO_EXT_PORTA, pin);
RK_GPIO_UNLOCK(sc);
return (0);
}
@ -342,12 +435,15 @@ rk_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
sc = device_get_softc(dev);
if (pin >= RK_GPIO_MAX_PINS)
return (EINVAL);
RK_GPIO_LOCK(sc);
if (value)
sc->swporta |= (1 << pin);
else
sc->swporta &= ~(1 << pin);
RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
rk_gpio_write_4(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
RK_GPIO_UNLOCK(sc);
return (0);
@ -360,12 +456,15 @@ rk_gpio_pin_toggle(device_t dev, uint32_t pin)
sc = device_get_softc(dev);
if (pin >= RK_GPIO_MAX_PINS)
return (EINVAL);
RK_GPIO_LOCK(sc);
if (sc->swporta & (1 << pin))
sc->swporta &= ~(1 << pin);
else
sc->swporta |= (1 << pin);
RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
rk_gpio_write_4(sc, RK_GPIO_SWPORTA_DR, sc->swporta);
RK_GPIO_UNLOCK(sc);
return (0);
@ -381,14 +480,14 @@ rk_gpio_pin_access_32(device_t dev, uint32_t first_pin, uint32_t clear_pins,
sc = device_get_softc(dev);
RK_GPIO_LOCK(sc);
reg = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DR);
reg = rk_gpio_read_4(sc, RK_GPIO_SWPORTA_DR);
if (orig_pins)
*orig_pins = reg;
sc->swporta = reg;
if ((clear_pins | change_pins) != 0) {
reg = (reg & ~clear_pins) ^ change_pins;
RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DR, reg);
rk_gpio_write_4(sc, RK_GPIO_SWPORTA_DR, reg);
}
RK_GPIO_UNLOCK(sc);
@ -421,10 +520,10 @@ rk_gpio_pin_config_32(device_t dev, uint32_t first_pin, uint32_t num_pins,
}
RK_GPIO_LOCK(sc);
reg = RK_GPIO_READ(sc, RK_GPIO_SWPORTA_DDR);
reg = rk_gpio_read_4(sc, RK_GPIO_SWPORTA_DDR);
reg &= ~mask;
reg |= set;
RK_GPIO_WRITE(sc, RK_GPIO_SWPORTA_DDR, reg);
rk_gpio_write_4(sc, RK_GPIO_SWPORTA_DDR, reg);
sc->swporta_ddr = reg;
RK_GPIO_UNLOCK(sc);