+++ /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-rtl83xx.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))
-
-struct rtl838x_gpios {
- struct gpio_chip gc;
- u32 id;
- struct device *dev;
- int irq;
- int num_leds;
- int min_led;
- int leds_per_port;
- u32 led_mode;
- int led_glb_ctrl;
- int led_sw_ctrl;
- int (*led_sw_p_ctrl)(int port);
- int (*led_sw_p_en_ctrl)(int port);
- int (*ext_gpio_dir)(int i);
- int (*ext_gpio_data)(int i);
-};
-
-inline int rtl838x_ext_gpio_dir(int i)
-{
- return RTL838X_EXT_GPIO_DIR + ((i >>5) << 2);
-}
-
-inline int rtl839x_ext_gpio_dir(int i)
-{
- return RTL839X_EXT_GPIO_DIR + ((i >>5) << 2);
-}
-
-inline int rtl838x_ext_gpio_data(int i)
-{
- return RTL838X_EXT_GPIO_DATA + ((i >>5) << 2);
-}
-
-inline int rtl839x_ext_gpio_data(int i)
-{
- return RTL839X_EXT_GPIO_DATA + ((i >>5) << 2);
-}
-
-inline int rtl838x_led_sw_p_ctrl(int p)
-{
- return RTL838X_LED_SW_P_CTRL + (p << 2);
-}
-
-inline int rtl839x_led_sw_p_ctrl(int p)
-{
- return RTL839X_LED_SW_P_CTRL + (p << 2);
-}
-
-inline int rtl838x_led_sw_p_en_ctrl(int p)
-{
- return RTL838X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
-}
-
-inline int rtl839x_led_sw_p_en_ctrl(int p)
-{
- return RTL839X_LED_SW_P_EN_CTRL + ((p / 10) << 2);
-}
-
-extern struct mutex smi_lock;
-extern struct rtl83xx_soc_info soc_info;
-
-
-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)
- rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DATA);
- else
- rtl83xx_w32_mask(BIT(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, BIT(bit), gpios->led_glb_ctrl);
- else
- sw_w32_mask(BIT(bit), 0, gpios->led_glb_ctrl);
- return;
- }
-
- bit = (offset - 64) % 32;
- /* First Port-LED */
- if (offset >= 64 && offset < 96
- && offset >= (64 + gpios->min_led)
- && offset < (64 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7, 5, gpios->led_sw_p_ctrl(bit));
- else
- sw_w32_mask(7, 0, gpios->led_sw_p_ctrl(bit));
- }
- if (offset >= 96 && offset < 128
- && offset >= (96 + gpios->min_led)
- && offset < (96 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7 << 3, 5 << 3, gpios->led_sw_p_ctrl(bit));
- else
- sw_w32_mask(7 << 3, 0, gpios->led_sw_p_ctrl(bit));
- }
- if (offset >= 128 && offset < 160
- && offset >= (128 + gpios->min_led)
- && offset < (128 + gpios->min_led + gpios->num_leds)) {
- if (value)
- sw_w32_mask(7 << 6, 5 << 6, gpios->led_sw_p_ctrl(bit));
- else
- sw_w32_mask(7 << 6, 0, gpios->led_sw_p_ctrl(bit));
- }
- __asm__ volatile ("sync");
-}
-
-static int rtl838x_direction_input(struct gpio_chip *gc, unsigned int offset)
-{
- pr_debug("%s: %d\n", __func__, offset);
-
- if (offset < 32) {
- rtl83xx_w32_mask(BIT(offset), 0, RTL838X_GPIO_PABC_DIR);
- return 0;
- }
-
- /* Internal LED driver does not support input */
- return -ENOTSUPP;
-}
-
-static int rtl838x_direction_output(struct gpio_chip *gc, unsigned int offset, int value)
-{
- pr_debug("%s: %d\n", __func__, offset);
- if (offset < 32)
- rtl83xx_w32_mask(0, BIT(offset), RTL838X_GPIO_PABC_DIR);
- rtl838x_gpio_set(gc, offset, value);
-
- /* LED for PWR and SYS driver is direction output by default */
- return 0;
-}
-
-static int rtl838x_get_direction(struct gpio_chip *gc, unsigned int offset)
-{
- u32 v = 0;
-
- pr_debug("%s: %d\n", __func__, offset);
- if (offset < 32) {
- v = rtl83xx_r32(RTL838X_GPIO_PABC_DIR);
- if (v & BIT(offset))
- return 0;
- return 1;
- }
-
- /* LED driver for PWR and SYS is direction output by default */
- if (offset >= 32 && offset < 64)
- return 0;
-
- return 0;
-}
-
-static int rtl838x_gpio_get(struct gpio_chip *gc, unsigned int offset)
-{
- u32 v;
- struct rtl838x_gpios *gpios = gpiochip_get_data(gc);
-
- pr_debug("%s: %d\n", __func__, offset);
-
- /* Internal GPIO of the RTL8380 */
- if (offset < 32) {
- v = rtl83xx_r32(RTL838X_GPIO_PABC_DATA);
- if (v & BIT(offset))
- return 1;
- return 0;
- }
-
- /* LED driver for PWR and SYS */
- if (offset >= 32 && offset < 64) {
- v = sw_r32(gpios->led_glb_ctrl);
- if (v & BIT(offset-32))
- return 1;
- return 0;
- }
-
-/* BUG:
- bit = (offset - 64) % 32;
- if (offset >= 64 && offset < 96) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
- return 1;
- return 0;
- }
- if (offset >= 96 && offset < 128) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
- return 1;
- return 0;
- }
- if (offset >= 128 && offset < 160) {
- if (sw_r32(RTL838X_LED1_SW_P_EN_CTRL) & BIT(bit))
- return 1;
- return 0;
- }
- */
- return 0;
-}
-
-void rtl8380_led_test(struct rtl838x_gpios *gpios, u32 mask)
-{
- int i;
- u32 led_gbl = sw_r32(gpios->led_glb_ctrl);
- u32 mode_sel, led_p_en;
-
- if (soc_info.family == RTL8380_FAMILY_ID) {
- mode_sel = sw_r32(RTL838X_LED_MODE_SEL);
- 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), gpios->led_glb_ctrl);
-
- if(soc_info.family == RTL8380_FAMILY_ID) {
- /* Enable all leds */
- sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
- }
- /* Enable software control of all leds */
- sw_w32(0xFFFFFFF, gpios->led_sw_ctrl);
- sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
- sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
-
- for (i = 0; i < 28; i++) {
- if (mask & BIT(i))
- sw_w32(5 | (5 << 3) | (5 << 6), gpios->led_sw_p_ctrl(i));
- }
- msleep(3000);
-
- if (soc_info.family == RTL8380_FAMILY_ID)
- sw_w32(led_p_en, RTL838X_LED_P_EN_CTRL);
- /* Disable software control of all leds */
- sw_w32(0x0000000, gpios->led_sw_ctrl);
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
-
- sw_w32(led_gbl, gpios->led_glb_ctrl);
- if (soc_info.family == RTL8380_FAMILY_ID)
- 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(gpios->led_sw_p_en_ctrl(0)),
- sw_r32(gpios->led_sw_p_en_ctrl(10)),
- sw_r32(gpios->led_sw_p_en_ctrl(20))
- );
-
- if (soc_info.family == RTL8380_FAMILY_ID) {
- pr_debug("led glb: %x, sel %x\n",
- sw_r32(gpios->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, gpios->led_sw_ctrl);
- if (soc_info.family == RTL8380_FAMILY_ID)
- sw_w32(0xFFFFFFF, RTL838X_LED_P_EN_CTRL);
-
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(0));
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(10));
- sw_w32(0x0000000, gpios->led_sw_p_en_ctrl(20));
-
- sw_w32_mask(0x3f, 0, gpios->led_glb_ctrl);
- switch (leds_per_port) {
- case 3:
- sw_w32_mask(0, 0x7 | (0x7 << 3), gpios->led_glb_ctrl);
- sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(20));
- /* FALLTHRU */
- case 2:
- sw_w32_mask(0, 0x3 | (0x3 << 3), gpios->led_glb_ctrl);
- sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(10));
- /* FALLTHRU */
- case 1:
- sw_w32_mask(0, 0x1 | (0x1 << 3), gpios->led_glb_ctrl);
- sw_w32(0xFFFFFFF, gpios->led_sw_p_en_ctrl(0));
- 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;
-
- 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 = soc_info.id;
-
- 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;
- 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 = RTL838X_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");
projects / openwrt / staging / xback.git / commitdiff