diff options
author | John Crispin <john@phrozen.org> | 2020-11-26 12:02:21 +0100 |
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committer | John Crispin <john@phrozen.org> | 2020-11-26 13:29:27 +0100 |
commit | 2b88563ee5aafd9571d965b7f2093a0f58d98a31 (patch) | |
tree | d2997a6745fe0cffab8db73d4a735c3366a301b0 /target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c | |
parent | 4e39949dd1f7eb706d857e1c44a992ae752132a7 (diff) | |
download | upstream-2b88563ee5aafd9571d965b7f2093a0f58d98a31.tar.gz upstream-2b88563ee5aafd9571d965b7f2093a0f58d98a31.tar.bz2 upstream-2b88563ee5aafd9571d965b7f2093a0f58d98a31.zip |
realtek: update the tree to the latest refactored version
* rename the target to realtek
* add refactored DSA driver
* add latest gpio driver
* lots of arch cleanups
* new irq driver
* additional boards
Signed-off-by: Bert Vermeulen <bert@biot.com>
Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c')
-rw-r--r-- | target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c b/target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c new file mode 100644 index 0000000000..92cf5f765a --- /dev/null +++ b/target/linux/realtek/files-5.4/drivers/gpio/gpio-rtl838x.c @@ -0,0 +1,425 @@ +// 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"); |