mirror of
https://github.com/openwrt/openwrt.git
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426 lines
11 KiB
C
426 lines
11 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/gpio/driver.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <asm/mach-rtl838x/mach-rtl83xx.h>
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/* RTL8231 registers for LED control */
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#define RTL8231_LED_FUNC0 0x0000
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#define RTL8231_GPIO_PIN_SEL(gpio) ((0x0002) + ((gpio) >> 4))
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#define RTL8231_GPIO_DIR(gpio) ((0x0005) + ((gpio) >> 4))
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#define RTL8231_GPIO_DATA(gpio) ((0x001C) + ((gpio) >> 4))
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struct rtl838x_gpios {
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struct gpio_chip gc;
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u32 id;
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struct device *dev;
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int irq;
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int num_leds;
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int min_led;
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int leds_per_port;
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u32 led_mode;
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int led_glb_ctrl;
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int led_sw_ctrl;
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int (*led_sw_p_ctrl)(int port);
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int (*led_sw_p_en_ctrl)(int port);
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int (*ext_gpio_dir)(int i);
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int (*ext_gpio_data)(int i);
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};
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inline int rtl838x_ext_gpio_dir(int i)
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{
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return RTL838X_EXT_GPIO_DIR + ((i >>5) << 2);
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}
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inline int rtl839x_ext_gpio_dir(int i)
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{
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return RTL839X_EXT_GPIO_DIR + ((i >>5) << 2);
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}
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inline int rtl838x_ext_gpio_data(int i)
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{
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return RTL838X_EXT_GPIO_DATA + ((i >>5) << 2);
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}
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inline int rtl839x_ext_gpio_data(int i)
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{
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return RTL839X_EXT_GPIO_DATA + ((i >>5) << 2);
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}
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inline int rtl838x_led_sw_p_ctrl(int p)
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{
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return RTL838X_LED_SW_P_CTRL + (p << 2);
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}
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inline int rtl839x_led_sw_p_ctrl(int p)
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{
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return RTL839X_LED_SW_P_CTRL + (p << 2);
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}
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inline int rtl838x_led_sw_p_en_ctrl(int p)
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{
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return RTL838X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
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}
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inline int rtl839x_led_sw_p_en_ctrl(int p)
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{
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return RTL839X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
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}
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extern struct mutex smi_lock;
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extern struct rtl83xx_soc_info soc_info;
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void rtl838x_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
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{
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int bit;
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struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
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pr_debug("rtl838x_set: %d, value: %d\n", offset, value);
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/* Internal GPIO of the RTL8380 */
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if (offset < 32) {
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if (value)
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rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DATA);
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else
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rtl83xx_w32_mask(BIT(offset), 0, RTL838X_GPIO_PABC_DATA);
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}
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/* LED driver for PWR and SYS */
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if (offset >= 32 && offset < 64) {
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bit = offset - 32;
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if (value)
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sw_w32_mask(0, BIT(bit), gpios->led_glb_ctrl);
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else
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sw_w32_mask(BIT(bit), 0, gpios->led_glb_ctrl);
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return;
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}
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bit = (offset - 64) % 32;
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/* First Port-LED */
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if (offset >= 64 && offset < 96
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&& offset >= (64 + gpios->min_led)
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&& offset < (64 + gpios->min_led + gpios->num_leds)) {
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if (value)
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sw_w32_mask(7, 5, gpios->led_sw_p_ctrl(bit));
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else
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sw_w32_mask(7, 0, gpios->led_sw_p_ctrl(bit));
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}
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if (offset >= 96 && offset < 128
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&& offset >= (96 + gpios->min_led)
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&& offset < (96 + gpios->min_led + gpios->num_leds)) {
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if (value)
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sw_w32_mask(7 << 3, 5 << 3, gpios->led_sw_p_ctrl(bit));
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else
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sw_w32_mask(7 << 3, 0, gpios->led_sw_p_ctrl(bit));
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}
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if (offset >= 128 && offset < 160
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&& offset >= (128 + gpios->min_led)
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&& offset < (128 + gpios->min_led + gpios->num_leds)) {
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if (value)
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sw_w32_mask(7 << 6, 5 << 6, gpios->led_sw_p_ctrl(bit));
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else
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sw_w32_mask(7 << 6, 0, gpios->led_sw_p_ctrl(bit));
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}
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__asm__ volatile ("sync");
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}
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static int rtl838x_direction_input(struct gpio_chip *gc, unsigned int offset)
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{
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pr_debug("%s: %d\n", __func__, offset);
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if (offset < 32) {
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rtl83xx_w32_mask(BIT(offset), 0, RTL838X_GPIO_PABC_DIR);
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return 0;
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}
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/* Internal LED driver does not support input */
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return -ENOTSUPP;
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}
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static int rtl838x_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
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{
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pr_debug("%s: %d\n", __func__, offset);
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if (offset < 32)
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rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DIR);
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rtl838x_gpio_set(gc, offset, value);
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/* LED for PWR and SYS driver is direction output by default */
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return 0;
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}
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static int rtl838x_get_direction(struct gpio_chip *gc, unsigned int offset)
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{
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u32 v = 0;
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pr_debug("%s: %d\n", __func__, offset);
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if (offset < 32) {
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v = rtl83xx_r32(RTL838X_GPIO_PABC_DIR);
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if (v & BIT(offset))
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return 0;
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return 1;
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}
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/* LED driver for PWR and SYS is direction output by default */
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if (offset >= 32 && offset < 64)
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return 0;
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return 0;
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}
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static int rtl838x_gpio_get(struct gpio_chip *gc, unsigned int offset)
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{
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u32 v;
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struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
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pr_debug("%s: %d\n", __func__, offset);
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/* Internal GPIO of the RTL8380 */
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if (offset < 32) {
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v = rtl83xx_r32(RTL838X_GPIO_PABC_DATA);
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if (v & BIT(offset))
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return 1;
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return 0;
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}
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/* LED driver for PWR and SYS */
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if (offset >= 32 && offset < 64) {
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v = sw_r32(gpios->led_glb_ctrl);
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if (v & BIT(offset-32))
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return 1;
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return 0;
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}
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/* BUG:
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bit = (offset - 64) % 32;
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if (offset >= 64 && offset < 96) {
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if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
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return 1;
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return 0;
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}
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if (offset >= 96 && offset < 128) {
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if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
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return 1;
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return 0;
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}
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if (offset >= 128 && offset < 160) {
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if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
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return 1;
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return 0;
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}
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*/
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return 0;
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}
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void rtl8380_led_test(struct rtl838x_gpios *gpios, u32 mask)
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{
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int i;
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u32 led_gbl = sw_r32(gpios->led_glb_ctrl);
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u32 mode_sel, led_p_en;
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if (soc_info.family == RTL8380_FAMILY_ID) {
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mode_sel = sw_r32(RTL838X_LED_MODE_SEL);
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led_p_en = sw_r32(RTL838X_LED_P_EN_CTRL);
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}
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/* 2 Leds for ports 0-23 and 24-27, 3 would be 0x7 */
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sw_w32_mask(0x3f, 0x3 | (0x3 << 3), gpios->led_glb_ctrl);
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if(soc_info.family == RTL8380_FAMILY_ID) {
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/* Enable all leds */
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sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
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}
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/* Enable software control of all leds */
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sw_w32(0xFFFFFFF, gpios->led_sw_ctrl);
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sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
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sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
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for (i = 0; i < 28; i++) {
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if (mask & BIT(i))
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sw_w32(5 | (5 << 3) | (5 << 6), gpios->led_sw_p_ctrl(i));
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}
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msleep(3000);
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if (soc_info.family == RTL8380_FAMILY_ID)
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sw_w32(led_p_en, RTL838X_LED_P_EN_CTRL);
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/* Disable software control of all leds */
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sw_w32(0x0000000, gpios->led_sw_ctrl);
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
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sw_w32(led_gbl, gpios->led_glb_ctrl);
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if (soc_info.family == RTL8380_FAMILY_ID)
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sw_w32(mode_sel, RTL838X_LED_MODE_SEL);
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}
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void take_port_leds(struct rtl838x_gpios *gpios)
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{
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int leds_per_port = gpios->leds_per_port;
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int mode = gpios->led_mode;
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pr_info("%s, %d, %x\n", __func__, leds_per_port, mode);
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pr_debug("Bootloader settings: %x %x %x\n",
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sw_r32(gpios->led_sw_p_en_ctrl(0)),
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sw_r32(gpios->led_sw_p_en_ctrl(10)),
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sw_r32(gpios->led_sw_p_en_ctrl(20))
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);
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if (soc_info.family == RTL8380_FAMILY_ID) {
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pr_debug("led glb: %x, sel %x\n",
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sw_r32(gpios->led_glb_ctrl), sw_r32(RTL838X_LED_MODE_SEL));
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pr_debug("RTL838X_LED_P_EN_CTRL: %x", sw_r32(RTL838X_LED_P_EN_CTRL));
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pr_debug("RTL838X_LED_MODE_CTRL: %x", sw_r32(RTL838X_LED_MODE_CTRL));
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sw_w32_mask(3, 0, RTL838X_LED_MODE_SEL);
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sw_w32(mode, RTL838X_LED_MODE_CTRL);
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}
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/* Enable software control of all leds */
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sw_w32(0xFFFFFFF, gpios->led_sw_ctrl);
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if (soc_info.family == RTL8380_FAMILY_ID)
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sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
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sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
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sw_w32_mask(0x3f, 0, gpios->led_glb_ctrl);
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switch (leds_per_port) {
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case 3:
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sw_w32_mask(0, 0x7 | (0x7 << 3), gpios->led_glb_ctrl);
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sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(20));
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/* FALLTHRU */
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case 2:
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sw_w32_mask(0, 0x3 | (0x3 << 3), gpios->led_glb_ctrl);
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sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
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/* FALLTHRU */
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case 1:
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sw_w32_mask(0, 0x1 | (0x1 << 3), gpios->led_glb_ctrl);
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sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
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break;
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default:
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pr_err("No LEDS configured for software control\n");
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}
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}
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static const struct of_device_id rtl838x_gpio_of_match[] = {
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{ .compatible = "realtek,rtl838x-gpio" },
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{},
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};
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MODULE_DEVICE_TABLE(of, rtl838x_gpio_of_match);
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static int rtl838x_gpio_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct rtl838x_gpios *gpios;
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int err;
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pr_info("Probing RTL838X GPIOs\n");
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if (!np) {
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dev_err(&pdev->dev, "No DT found\n");
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return -EINVAL;
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}
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gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL);
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if (!gpios)
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return -ENOMEM;
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gpios->id = soc_info.id;
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switch (gpios->id) {
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case 0x8332:
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pr_debug("Found RTL8332M GPIO\n");
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break;
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case 0x8380:
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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;
|
||
|
|
case 0x8391:
|
||
|
|
pr_debug("Found RTL8391 GPIO\n");
|
||
|
|
break;
|
||
|
|
case 0x8393:
|
||
|
|
pr_debug("Found RTL8393 GPIO\n");
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
pr_err("Unknown GPIO chip id (%04x)\n", gpios->id);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (soc_info.family == RTL8380_FAMILY_ID) {
|
||
|
|
gpios->led_glb_ctrl = gpios->led_glb_ctrl;
|
||
|
|
gpios->led_sw_ctrl = RTL838X_LED_SW_CTRL;
|
||
|
|
gpios->led_sw_p_ctrl = rtl838x_led_sw_p_ctrl;
|
||
|
|
gpios->led_sw_p_en_ctrl = rtl838x_led_sw_p_en_ctrl;
|
||
|
|
gpios->ext_gpio_dir = rtl838x_ext_gpio_dir;
|
||
|
|
gpios->ext_gpio_data = rtl838x_ext_gpio_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (soc_info.family == RTL8390_FAMILY_ID) {
|
||
|
|
gpios->led_glb_ctrl = RTL839X_LED_GLB_CTRL;
|
||
|
|
gpios->led_sw_ctrl = RTL839X_LED_SW_CTRL;
|
||
|
|
gpios->led_sw_p_ctrl = rtl839x_led_sw_p_ctrl;
|
||
|
|
gpios->led_sw_p_en_ctrl = rtl839x_led_sw_p_en_ctrl;
|
||
|
|
gpios->ext_gpio_dir = rtl839x_ext_gpio_dir;
|
||
|
|
gpios->ext_gpio_data = rtl839x_ext_gpio_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
gpios->dev = dev;
|
||
|
|
gpios->gc.base = 0;
|
||
|
|
/* 0-31: internal
|
||
|
|
* 32-63, LED control register
|
||
|
|
* 64-95: PORT-LED 0
|
||
|
|
* 96-127: PORT-LED 1
|
||
|
|
* 128-159: PORT-LED 2
|
||
|
|
*/
|
||
|
|
gpios->gc.ngpio = 160;
|
||
|
|
gpios->gc.label = "rtl838x";
|
||
|
|
gpios->gc.parent = dev;
|
||
|
|
gpios->gc.owner = THIS_MODULE;
|
||
|
|
gpios->gc.can_sleep = true;
|
||
|
|
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_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");
|