+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-
-#include <linux/gpio/driver.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <asm/mach-rtl838x/mach-rtl838x.h>
-
-/* RTL8231 registers for LED control */
-#define RTL8231_LED_FUNC0 0x0000
-#define RTL8231_GPIO_PIN_SEL(gpio) ((0x0002) + ((gpio) >> 4))
-#define RTL8231_GPIO_DIR(gpio) ((0x0005) + ((gpio) >> 4))
-#define RTL8231_GPIO_DATA(gpio) ((0x001C) + ((gpio) >> 4))
-#define RTL8231_GPIO_PIN_SEL0 0x0002
-#define RTL8231_GPIO_PIN_SEL1 0x0003
-#define RTL8231_GPIO_PIN_SEL2 0x0004
-#define RTL8231_GPIO_IO_SEL0 0x0005
-#define RTL8231_GPIO_IO_SEL1 0x0006
-#define RTL8231_GPIO_IO_SEL2 0x0007
-
-#define MDC_WAIT { int i; for (i = 0; i < 2; i++); }
-#define I2C_WAIT { int i; for (i = 0; i < 5; i++); }
-
-struct rtl838x_gpios {
- struct gpio_chip gc;
- u32 id;
- struct device *dev;
- int irq;
- int bus_id;
- int num_leds;
- int min_led;
- int leds_per_port;
- u32 led_mode;
- u16 rtl8381_phy_id;
- int smi_clock;
- int smi_data;
- int i2c_sda;
- int i2c_sdc;
-};
-
-u32 rtl838x_rtl8231_read(u8 bus_id, u32 reg)
-{
- u32 t = 0;
-
- reg &= 0x1f;
- bus_id &= 0x1f;
-
- /* Calculate read register address */
- t = (bus_id << 2) | (reg << 7);
-
- mutex_lock(&smi_lock);
- /* Set execution bit: cleared when operation completed */
- t |= 1;
- sw_w32(t, RTL838X_EXT_GPIO_INDRT_ACCESS);
- do { /* TODO: Return 0x80000000 if timeout */
- t = sw_r32(RTL838X_EXT_GPIO_INDRT_ACCESS);
- } while (t & 1);
- pr_debug("%s: %x, %x, %x\n", __func__, bus_id, reg, (t & 0xffff0000) >> 16);
-
- mutex_unlock(&smi_lock);
- return (t & 0xffff0000) >> 16;
-}
-
-int rtl838x_rtl8231_write(u8 bus_id, u32 reg, u32 data)
-{
- u32 t = 0;
-
- pr_debug("%s: %x, %x, %x\n", __func__, bus_id, reg, data);
- data &= 0xffff;
- reg &= 0x1f;
- bus_id &= 0x1f;
-
- mutex_lock(&smi_lock);
- t = (bus_id << 2) | (reg << 7) | (data << 16);
- /* Set write bit */
- t |= 2;
-
- /* Set execution bit: cleared when operation completed */
- t |= 1;
- sw_w32(t, RTL838X_EXT_GPIO_INDRT_ACCESS);
- do { /* TODO: Return -1 if timeout */
- t = sw_r32(RTL838X_EXT_GPIO_INDRT_ACCESS);
- } while (t & 1);
-
- mutex_unlock(&smi_lock);
- return 0;
-}
-
-static int rtl8231_pin_dir(u8 bus_id, u32 gpio, u32 dir)
-{
- /* dir 1: input
- * dir 0: output
- */
-
- u32 v;
- int pin_sel_addr = RTL8231_GPIO_PIN_SEL(gpio);
- int pin_dir_addr = RTL8231_GPIO_DIR(gpio);
- int pin = gpio % 16;
- int dpin = pin;
-
- if (gpio > 31) {
- dpin = pin << 5;
- pin_dir_addr = pin_sel_addr;
- }
-
- /* Select GPIO function for pin */
- v = rtl838x_rtl8231_read(bus_id, pin_sel_addr);
- if (v & 0x80000000) {
- pr_err("Error reading RTL8231\n");
- return -1;
- }
- rtl838x_rtl8231_write(bus_id, pin_sel_addr, v | (1 << pin));
-
- v = rtl838x_rtl8231_read(bus_id, pin_dir_addr);
- if (v & 0x80000000) {
- pr_err("Error reading RTL8231\n");
- return -1;
- }
- rtl838x_rtl8231_write(bus_id, pin_dir_addr,
- (v & ~(1 << dpin)) | (dir << dpin));
- return 0;
-}
-
-static int rtl8231_pin_dir_get(u8 bus_id, u32 gpio, u32 *dir)
-{
- /* dir 1: input
- * dir 0: output
- */
-
- u32 v;
- int pin_dir_addr = RTL8231_GPIO_DIR(gpio);
- int pin = gpio % 16;
-
- if (gpio > 31) {
- pin_dir_addr = RTL8231_GPIO_PIN_SEL(gpio);
- pin = pin << 5;
- }
-
- v = rtl838x_rtl8231_read(bus_id, pin_dir_addr);
- if (v & (1 << pin))
- *dir = 1;
- else
- *dir = 0;
- return 0;
-}
-
-static int rtl8231_pin_set(u8 bus_id, u32 gpio, u32 data)
-{
- u32 v = rtl838x_rtl8231_read(bus_id, RTL8231_GPIO_DATA(gpio));
-
- if (v & 0x80000000) {
- pr_err("Error reading RTL8231\n");
- return -1;
- }
- rtl838x_rtl8231_write(bus_id, RTL8231_GPIO_DATA(gpio),
- (v & ~(1 << (gpio % 16))) | (data << (gpio % 16)));
- return 0;
-}
-
-static int rtl8231_pin_get(u8 bus_id, u32 gpio, u16 *state)
-{
- u32 v = rtl838x_rtl8231_read(bus_id, RTL8231_GPIO_DATA(gpio));
-
- if (v & 0x80000000) {
- pr_err("Error reading RTL8231\n");
- return -1;
- }
-
- *state = v & 0xffff;
- return 0;
-}
-
-static int rtl838x_direction_input(struct gpio_chip *gc, unsigned int offset)
-{
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("%s: %d\n", __func__, offset);
-
- if (offset < 32) {
- rtl838x_w32_mask(1 << offset, 0, RTL838X_GPIO_PABC_DIR);
- return 0;
- }
-
- /* Internal LED driver does not support input */
- if (offset >= 32 && offset < 64)
- return -ENOTSUPP;
-
- if (offset >= 64 && offset < 100 && gpios->bus_id >= 0)
- return rtl8231_pin_dir(gpios->bus_id, offset - 64, 1);
-
- return -ENOTSUPP;
-}
-
-static int rtl838x_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
-{
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("%s: %d\n", __func__, offset);
- if (offset < 32)
- rtl838x_w32_mask(0, 1 << offset, RTL838X_GPIO_PABC_DIR);
-
- /* LED for PWR and SYS driver is direction output by default */
- if (offset >= 32 && offset < 64)
- return 0;
-
- if (offset >= 64 && offset < 100 && gpios->bus_id >= 0)
- return rtl8231_pin_dir(gpios->bus_id, offset - 64, 0);
- return 0;
-}
-
-static int rtl838x_get_direction(struct gpio_chip *gc, unsigned int offset)
-{
- u32 v = 0;
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("%s: %d\n", __func__, offset);
- if (offset < 32) {
- v = rtl838x_r32(RTL838X_GPIO_PABC_DIR);
- if (v & (1 << offset))
- return 0;
- return 1;
- }
-
- /* LED driver for PWR and SYS is direction output by default */
- if (offset >= 32 && offset < 64)
- return 0;
-
- if (offset >= 64 && offset < 100 && gpios->bus_id >= 0) {
- rtl8231_pin_dir_get(gpios->bus_id, offset - 64, &v);
- return v;
- }
-
- return 0;
-}
-
-static int rtl838x_gpio_get(struct gpio_chip *gc, unsigned int offset)
-{
- u32 v;
- u16 state = 0;
- int bit;
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("%s: %d\n", __func__, offset);
-
- /* Internal GPIO of the RTL8380 */
- if (offset < 32) {
- v = rtl838x_r32(RTL838X_GPIO_PABC_DATA);
- if (v & (1 << offset))
- return 1;
- return 0;
- }
-
- /* LED driver for PWR and SYS */
- if (offset >= 32 && offset < 64) {
- v = sw_r32(RTL838X_LED_GLB_CTRL);
- if (v & (1 << (offset-32)))
- return 1;
- return 0;
- }
-
- /* Indirect access GPIO with RTL8231 */
- if (offset >= 64 && offset < 100 && gpios->bus_id >= 0) {
- rtl8231_pin_get(gpios->bus_id, offset - 64, &state);
- if (state & (1 << (offset % 16)))
- return 1;
- return 0;
- }
-
- bit = (offset - 100) % 32;
- if (offset >= 100 && offset < 132) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & (1 << bit))
- return 1;
- return 0;
- }
- if (offset >= 132 && offset < 164) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & (1 << bit))
- return 1;
- return 0;
- }
- if (offset >= 164 && offset < 196) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & (1 << bit))
- return 1;
- return 0;
- }
- return 0;
-}
-
-void rtl838x_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
-{
- int bit;
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("rtl838x_set: %d, value: %d\n", offset, value);
- /* Internal GPIO of the RTL8380 */
- if (offset < 32) {
- if (value)
- rtl838x_w32_mask(0, 1 << offset, RTL838X_GPIO_PABC_DATA);
- else
- rtl838x_w32_mask(1 << offset, 0, RTL838X_GPIO_PABC_DATA);
- }
-
- /* LED driver for PWR and SYS */
- if (offset >= 32 && offset < 64) {
- bit = offset - 32;
- if (value)
- sw_w32_mask(0, 1 << bit, RTL838X_LED_GLB_CTRL);
- else
- sw_w32_mask(1 << bit, 0, RTL838X_LED_GLB_CTRL);
- return;
- }
-
- /* Indirect access GPIO with RTL8231 */
- if (offset >= 64 && offset < 100 && gpios->bus_id >= 0) {
- rtl8231_pin_set(gpios->bus_id, offset - 64, value);
- return;
- }
-
- bit = (offset - 100) % 32;
- /* First Port-LED */
- if (offset >= 100 && offset < 132
- && offset >= (100 + gpios->min_led)
- && offset < (100 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7, 5, RTL838X_LED_SW_P_CTRL(bit));
- else
- sw_w32_mask(7, 0, RTL838X_LED_SW_P_CTRL(bit));
- }
- if (offset >= 132 && offset < 164
- && offset >= (132 + gpios->min_led)
- && offset < (132 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7 << 3, 5 << 3, RTL838X_LED_SW_P_CTRL(bit));
- else
- sw_w32_mask(7 << 3, 0, RTL838X_LED_SW_P_CTRL(bit));
- }
- if (offset >= 164 && offset < 196
- && offset >= (164 + gpios->min_led)
- && offset < (164 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7 << 6, 5 << 6, RTL838X_LED_SW_P_CTRL(bit));
- else
- sw_w32_mask(7 << 6, 0, RTL838X_LED_SW_P_CTRL(bit));
- }
- __asm__ volatile ("sync");
-}
-
-int rtl8231_init(struct rtl838x_gpios *gpios)
-{
- uint32_t v;
- u8 bus_id = gpios->bus_id;
-
- pr_info("%s called\n", __func__);
-
- /* Enable RTL8231 indirect access mode */
- sw_w32_mask(0, 1, RTL838X_EXTRA_GPIO_CTRL);
- sw_w32_mask(3, 1, RTL838X_DMY_REG5);
-
- /* Enable RTL8231 via GPIO_A1 line */
- rtl838x_w32_mask(0, 1 << RTL838X_GPIO_A1, RTL838X_GPIO_PABC_DIR);
- rtl838x_w32_mask(0, 1 << RTL838X_GPIO_A1, RTL838X_GPIO_PABC_DATA);
- mdelay(50); /* wait 50ms for reset */
-
- /*Select GPIO functionality for pins 0-15, 16-31 and 32-37 */
- rtl838x_rtl8231_write(bus_id, RTL8231_GPIO_PIN_SEL(0), 0xffff);
- rtl838x_rtl8231_write(bus_id, RTL8231_GPIO_PIN_SEL(16), 0xffff);
- rtl838x_rtl8231_write(bus_id, RTL8231_GPIO_PIN_SEL2, 0x03ff);
-
- v = rtl838x_rtl8231_read(bus_id, RTL8231_LED_FUNC0);
- pr_info("RTL8231 led function now: %x\n", v);
-
- return 0;
-}
-
-static void smi_write_bit(struct rtl838x_gpios *gpios, u32 bit)
-{
- if (bit)
- rtl838x_w32_mask(0, 1 << gpios->smi_data, RTL838X_GPIO_PABC_DATA);
- else
- rtl838x_w32_mask(1 << gpios->smi_data, 0, RTL838X_GPIO_PABC_DATA);
-
- MDC_WAIT;
- rtl838x_w32_mask(1 << gpios->smi_clock, 0, RTL838X_GPIO_PABC_DATA);
- MDC_WAIT;
- rtl838x_w32_mask(0, 1 << gpios->smi_clock, RTL838X_GPIO_PABC_DATA);
-}
-
-static int smi_read_bit(struct rtl838x_gpios *gpios)
-{
- u32 v;
-
- MDC_WAIT;
- rtl838x_w32_mask(1 << gpios->smi_clock, 0, RTL838X_GPIO_PABC_DATA);
- MDC_WAIT;
- rtl838x_w32_mask(0, 1 << gpios->smi_clock, RTL838X_GPIO_PABC_DATA);
-
- v = rtl838x_r32(RTL838X_GPIO_PABC_DATA);
- if (v & (1 << gpios->smi_data))
- return 1;
- return 0;
-}
-
-/* Tri-state of MDIO line */
-static void smi_z(struct rtl838x_gpios *gpios)
-{
- /* MDIO pin to input */
- rtl838x_w32_mask(1 << gpios->smi_data, 0, RTL838X_GPIO_PABC_DIR);
- MDC_WAIT;
- rtl838x_w32_mask(1 << gpios->smi_clock, 0, RTL838X_GPIO_PABC_DATA);
- MDC_WAIT;
- rtl838x_w32_mask(0, 1 << gpios->smi_clock, RTL838X_GPIO_PABC_DATA);
-}
-
-static void smi_write_bits(struct rtl838x_gpios *gpios, u32 data, int len)
-{
- while (len) {
- len--;
- smi_write_bit(gpios, data & (1 << len));
- }
-}
-
-static void smi_read_bits(struct rtl838x_gpios *gpios, int len, u32 *data)
-{
- u32 v = 0;
-
- while (len) {
- len--;
- v <<= 1;
- v |= smi_read_bit(gpios);
- }
- *data = v;
-}
-
-/* Bit-banged verson of SMI write access, caller must hold smi_lock */
-int rtl8380_smi_write(struct rtl838x_gpios *gpios, u16 reg, u32 data)
-{
- u16 bus_id = gpios->bus_id;
-
- /* Set clock and data pins on RTL838X to output */
- rtl838x_w32_mask(0, 1 << gpios->smi_clock, RTL838X_GPIO_PABC_DIR);
- rtl838x_w32_mask(0, 1 << gpios->smi_data, RTL838X_GPIO_PABC_DIR);
-
- /* Write start bits */
- smi_write_bits(gpios, 0xffffffff, 32);
-
- smi_write_bits(gpios, 0x5, 4); /* ST and write OP */
-
- smi_write_bits(gpios, bus_id, 5); /* 5 bits: phy address */
- smi_write_bits(gpios, reg, 5); /* 5 bits: register address */
-
- smi_write_bits(gpios, 0x2, 2); /* TURNAROUND */
-
- smi_write_bits(gpios, data, 16); /* 16 bits: data*/
-
- smi_z(gpios);
-
- return 0;
-}
-
-/* Bit-banged verson of SMI read access, caller must hold smi_lock */
-int rtl8380_smi_read(struct rtl838x_gpios *gpios, u16 reg, u32 *data)
-{
- u16 bus_id = gpios->bus_id;
-
- /* Set clock and data pins on RTL838X to output */
- rtl838x_w32_mask(0, 1 << gpios->smi_clock, RTL838X_GPIO_PABC_DIR);
- rtl838x_w32_mask(0, 1 << gpios->smi_data, RTL838X_GPIO_PABC_DIR);
-
- /* Write start bits */
- smi_write_bits(gpios, 0xffffffff, 32);
-
- smi_write_bits(gpios, 0x6, 4); /* ST and read OP */
-
- smi_write_bits(gpios, bus_id, 5); /* 5 bits: phy address */
- smi_write_bits(gpios, reg, 5); /* 5 bits: register address */
-
- smi_z(gpios); /* TURNAROUND */
-
- smi_read_bits(gpios, 16, data);
- return 0;
-}
-
-static void i2c_pin_set(struct rtl838x_gpios *gpios, int pin, u32 data)
-{
- u32 v;
-
- rtl8380_smi_read(gpios, RTL8231_GPIO_DATA(pin), &v);
- if (!data)
- v &= ~(1 << (pin % 16));
- else
- v |= (1 << (pin % 16));
- rtl8380_smi_write(gpios, RTL8231_GPIO_DATA(pin), v);
-}
-
-static void i2c_pin_get(struct rtl838x_gpios *gpios, int pin, u32 *data)
-{
- u32 v;
-
- rtl8380_smi_read(gpios, RTL8231_GPIO_DATA(pin), &v);
- if (v & (1 << (pin % 16))) {
- *data = 1;
- return;
- }
- *data = 0;
-}
-
-static void i2c_pin_dir(struct rtl838x_gpios *gpios, int pin, u16 direction)
-{
- u32 v;
-
- rtl8380_smi_read(gpios, RTL8231_GPIO_DIR(pin), &v);
- if (direction) // Output
- v &= ~(1 << (pin % 16));
- else
- v |= (1 << (pin % 16));
- rtl8380_smi_write(gpios, RTL8231_GPIO_DIR(pin), v);
-}
-
-static void i2c_start(struct rtl838x_gpios *gpios)
-{
- i2c_pin_dir(gpios, gpios->i2c_sda, 0); /* Output */
- i2c_pin_dir(gpios, gpios->i2c_sdc, 0); /* Output */
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 1);
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sda, 1);
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sda, 0);
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 0);
- I2C_WAIT;
-}
-
-static void i2c_stop(struct rtl838x_gpios *gpios)
-{
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 1);
- i2c_pin_set(gpios, gpios->i2c_sda, 0);
- I2C_WAIT;
-
- i2c_pin_set(gpios, gpios->i2c_sda, 1);
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 0);
-
- i2c_pin_dir(gpios, gpios->i2c_sda, 1); /* Input */
- i2c_pin_dir(gpios, gpios->i2c_sdc, 1); /* Input */
-}
-
-static void i2c_read_bits(struct rtl838x_gpios *gpios, int len, u32 *data)
-{
- u32 v = 0, t;
-
- while (len) {
- len--;
- v <<= 1;
- i2c_pin_set(gpios, gpios->i2c_sdc, 1);
- I2C_WAIT;
- i2c_pin_get(gpios, gpios->i2c_sda, &t);
- v |= t;
- i2c_pin_set(gpios, gpios->i2c_sdc, 0);
- I2C_WAIT;
- }
- *data = v;
-}
-
-static void i2c_write_bits(struct rtl838x_gpios *gpios, u32 data, int len)
-{
- while (len) {
- len--;
- i2c_pin_set(gpios, gpios->i2c_sda, data & (1 << len));
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 1);
- I2C_WAIT;
- i2c_pin_set(gpios, gpios->i2c_sdc, 0);
- I2C_WAIT;
- }
-}
-
-/* This initializes direct external GPIOs via the RTL8231 */
-int rtl8380_rtl8321_init(struct rtl838x_gpios *gpios)
-{
- u32 v;
- int mdc = gpios->smi_clock;
- int mdio = gpios->smi_data;
-
- pr_info("Configuring SMI: Clock %d, Data %d\n", mdc, mdio);
- sw_w32_mask(0, 0x2, RTL838X_IO_DRIVING_ABILITY_CTRL);
-
- /* Enter simulated GPIO mode */
- sw_w32_mask(1, 0, RTL838X_EXTRA_GPIO_CTRL);
-
- /* MDIO clock to 2.6MHz */
- sw_w32_mask(0x3 << 8, 0, RTL838X_EXTRA_GPIO_CTRL);
-
- /* Configure SMI clock and data GPIO pins */
- rtl838x_w32_mask((1 << mdc) | (1 << mdio), 0, RTL838X_GPIO_PABC_CNR);
- rtl838x_w32_mask(0, (1 << mdc) | (1 << mdio), RTL838X_GPIO_PABC_DIR);
-
- rtl8380_smi_write(gpios, RTL8231_GPIO_PIN_SEL0, 0xffff);
- rtl8380_smi_write(gpios, RTL8231_GPIO_PIN_SEL1, 0xffff);
- rtl8380_smi_read(gpios, RTL8231_GPIO_PIN_SEL2, &v);
- v |= 0x1f;
- rtl8380_smi_write(gpios, RTL8231_GPIO_PIN_SEL2, v);
-
- rtl8380_smi_write(gpios, RTL8231_GPIO_IO_SEL0, 0xffff);
- rtl8380_smi_write(gpios, RTL8231_GPIO_IO_SEL1, 0xffff);
- rtl8380_smi_read(gpios, RTL8231_GPIO_IO_SEL2, &v);
- v |= 0x1f << 5;
- rtl8380_smi_write(gpios, RTL8231_GPIO_PIN_SEL2, v);
-
- return 0;
-}
-
-void rtl8380_led_test(u32 mask)
-{
- int i;
- u32 mode_sel = sw_r32(RTL838X_LED_MODE_SEL);
- u32 led_gbl = sw_r32(RTL838X_LED_GLB_CTRL);
- u32 led_p_en = sw_r32(RTL838X_LED_P_EN_CTRL);
-
- /* 2 Leds for ports 0-23 and 24-27, 3 would be 0x7 */
- sw_w32_mask(0x3f, 0x3 | (0x3 << 3), RTL838X_LED_GLB_CTRL);
- /* Enable all leds */
- sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
-
- /* Enable software control of all leds */
- sw_w32(0xFFFFFFF, RTL838X_LED_SW_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED0_SW_P_EN_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED1_SW_P_EN_CTRL);
- sw_w32(0x0000000, RTL838X_LED2_SW_P_EN_CTRL);
-
- for (i = 0; i < 28; i++) {
- if (mask & (1 << i))
- sw_w32(5 | (5 << 3) | (5 << 6),
- RTL838X_LED_SW_P_CTRL(i));
- }
- msleep(3000);
-
- sw_w32(led_p_en, RTL838X_LED_P_EN_CTRL);
- /* Disable software control of all leds */
- sw_w32(0x0000000, RTL838X_LED_SW_CTRL);
- sw_w32(0x0000000, RTL838X_LED0_SW_P_EN_CTRL);
- sw_w32(0x0000000, RTL838X_LED1_SW_P_EN_CTRL);
- sw_w32(0x0000000, RTL838X_LED2_SW_P_EN_CTRL);
-
- sw_w32(led_gbl, RTL838X_LED_GLB_CTRL);
- sw_w32(mode_sel, RTL838X_LED_MODE_SEL);
-}
-
-void take_port_leds(struct rtl838x_gpios *gpios)
-{
- int leds_per_port = gpios->leds_per_port;
- int mode = gpios->led_mode;
-
- pr_info("%s, %d, %x\n", __func__, leds_per_port, mode);
- pr_debug("Bootloader settings: %x %x %x\n",
- sw_r32(RTL838X_LED0_SW_P_EN_CTRL),
- sw_r32(RTL838X_LED1_SW_P_EN_CTRL),
- sw_r32(RTL838X_LED2_SW_P_EN_CTRL)
- );
-
- pr_debug("led glb: %x, sel %x\n",
- sw_r32(RTL838X_LED_GLB_CTRL), sw_r32(RTL838X_LED_MODE_SEL));
- pr_debug("RTL838X_LED_P_EN_CTRL: %x", sw_r32(RTL838X_LED_P_EN_CTRL));
- pr_debug("RTL838X_LED_MODE_CTRL: %x", sw_r32(RTL838X_LED_MODE_CTRL));
-
- sw_w32_mask(3, 0, RTL838X_LED_MODE_SEL);
- sw_w32(mode, RTL838X_LED_MODE_CTRL);
-
- /* Enable software control of all leds */
- sw_w32(0xFFFFFFF, RTL838X_LED_SW_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
-
- sw_w32(0x0000000, RTL838X_LED0_SW_P_EN_CTRL);
- sw_w32(0x0000000, RTL838X_LED1_SW_P_EN_CTRL);
- sw_w32(0x0000000, RTL838X_LED2_SW_P_EN_CTRL);
-
- sw_w32_mask(0x3f, 0, RTL838X_LED_GLB_CTRL);
- switch (leds_per_port) {
- case 3:
- sw_w32_mask(0, 0x7 | (0x7 << 3), RTL838X_LED_GLB_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED2_SW_P_EN_CTRL);
- /* FALLTHRU */
- case 2:
- sw_w32_mask(0, 0x3 | (0x3 << 3), RTL838X_LED_GLB_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED1_SW_P_EN_CTRL);
- /* FALLTHRU */
- case 1:
- sw_w32_mask(0, 0x1 | (0x1 << 3), RTL838X_LED_GLB_CTRL);
- sw_w32(0xFFFFFFF, RTL838X_LED0_SW_P_EN_CTRL);
- break;
- default:
- pr_err("No LEDS configured for software control\n");
- }
-}
-
-static const struct of_device_id rtl838x_gpio_of_match[] = {
- { .compatible = "realtek,rtl838x-gpio" },
- {},
-};
-
-MODULE_DEVICE_TABLE(of, rtl838x_gpio_of_match);
-
-static int rtl838x_gpio_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct rtl838x_gpios *gpios;
- int err;
- u8 indirect_bus_id;
-
- pr_info("Probing RTL838X GPIOs\n");
-
- if (!np) {
- dev_err(&pdev->dev, "No DT found\n");
- return -EINVAL;
- }
-
- gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL);
- if (!gpios)
- return -ENOMEM;
-
- gpios->id = sw_r32(RTL838X_MODEL_NAME_INFO) >> 16;
-
- switch (gpios->id) {
- case 0x8332:
- pr_debug("Found RTL8332M GPIO\n");
- break;
- case 0x8380:
- pr_debug("Found RTL8380M GPIO\n");
- break;
- case 0x8381:
- pr_debug("Found RTL8381M GPIO\n");
- break;
- case 0x8382:
- pr_debug("Found RTL8382M GPIO\n");
- break;
- default:
- pr_err("Unknown GPIO chip id (%04x)\n", gpios->id);
- return -ENODEV;
- }
-
- gpios->dev = dev;
- gpios->gc.base = 0;
- /* 0-31: internal
- * 32-63, LED control register
- * 64-99: external RTL8231
- * 100-131: PORT-LED 0
- * 132-163: PORT-LED 1
- * 164-195: PORT-LED 2
- */
- gpios->gc.ngpio = 196;
- gpios->gc.label = "rtl838x";
- gpios->gc.parent = dev;
- gpios->gc.owner = THIS_MODULE;
- gpios->gc.can_sleep = true;
- gpios->bus_id = -1;
- gpios->irq = 31;
-
- gpios->gc.direction_input = rtl838x_direction_input;
- gpios->gc.direction_output = rtl838x_direction_output;
- gpios->gc.set = rtl838x_gpio_set;
- gpios->gc.get = rtl838x_gpio_get;
- gpios->gc.get_direction = rtl838x_get_direction;
-
- if (!of_property_read_u8(np, "indirect-access-bus-id", &indirect_bus_id)) {
- gpios->bus_id = indirect_bus_id;
- rtl8231_init(gpios);
- }
- if (!of_property_read_u8(np, "smi-bus-id", &indirect_bus_id)) {
- gpios->bus_id = indirect_bus_id;
- gpios->smi_clock = RTL838X_GPIO_A2;
- gpios->smi_data = RTL838X_GPIO_A3;
- gpios->i2c_sda = 1;
- gpios->i2c_sdc = 2;
- rtl8380_rtl8321_init(gpios);
- }
-
- if (of_property_read_bool(np, "take-port-leds")) {
- if (of_property_read_u32(np, "leds-per-port", &gpios->leds_per_port))
- gpios->leds_per_port = 2;
- if (of_property_read_u32(np, "led-mode", &gpios->led_mode))
- gpios->led_mode = (0x1ea << 15) | 0x1ea;
- if (of_property_read_u32(np, "num-leds", &gpios->num_leds))
- gpios->num_leds = 32;
- if (of_property_read_u32(np, "min-led", &gpios->min_led))
- gpios->min_led = 0;
- take_port_leds(gpios);
- }
-
- err = devm_gpiochip_add_data(dev, &gpios->gc, gpios);
- return err;
-}
-
-
-static struct platform_driver rtl838x_gpio_driver = {
- .driver = {
- .name = "rtl838x-gpio",
- .of_match_table = rtl838x_gpio_of_match,
- },
- .probe = rtl838x_gpio_probe,
-};
-
-module_platform_driver(rtl838x_gpio_driver);
-
-MODULE_DESCRIPTION("Realtek RTL838X GPIO API support");
-MODULE_LICENSE("GPL v2");
projects / openwrt / openwrt.git / blobdiff