--- /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 = 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");
projects / openwrt / openwrt.git / blobdiff