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led: led_cortina: Add CAxxx LED support
Add Cortina Access LED controller support for CAxxxx SOCs Signed-off-by: Jway Lin <jway.lin@cortina-access.com> Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com> CC: Simon Glass <sjg@chromium.org> Add head file fixed link error and remove unused flashing function Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jway Lin
Tom Rini
parent
e1ecfc1262
commit
047e31ed4b
4 changed files with 310 additions and 1 deletions
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@ -181,6 +181,7 @@ F: board/cortina/common/
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F: drivers/gpio/cortina_gpio.c
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F: drivers/watchdog/cortina_wdt.c
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F: drivers/serial/serial_cortina.c
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F: drivers/led/led_cortina.c
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F: drivers/mmc/ca_dw_mmc.c
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F: drivers/i2c/i2c-cortina.c
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F: drivers/i2c/i2c-cortina.h
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@ -766,6 +767,7 @@ F: board/cortina/common/
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F: drivers/gpio/cortina_gpio.c
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F: drivers/watchdog/cortina_wdt.c
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F: drivers/serial/serial_cortina.c
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F: drivers/led/led_cortina.c
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F: drivers/mmc/ca_dw_mmc.c
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F: drivers/i2c/i2c-cortina.c
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F: drivers/i2c/i2c-cortina.h
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@ -868,7 +870,7 @@ S: Maintained
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F: arch/powerpc/
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POWERPC MPC8XX
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M: Christophe Leroy <christophe.leroy@csgroup.eu>
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M: Christophe Leroy <christophe.leroy@c-s.fr>
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S: Maintained
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T: git https://gitlab.denx.de/u-boot/custodians/u-boot-mpc8xx.git
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F: arch/powerpc/cpu/mpc8xx/
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@ -35,6 +35,14 @@ config LED_BCM6858
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This option enables support for LEDs connected to the BCM6858
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HW has blinking capabilities and up to 32 LEDs can be controlled.
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config LED_CORTINA
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bool "LED Support for Cortina Access CAxxxx SoCs"
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depends on LED && (CORTINA_PLATFORM)
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help
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This option enables support for LEDs connected to the Cortina
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Access CAxxxx SOCs.
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config LED_BLINK
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bool "Support LED blinking"
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depends on LED
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@ -8,3 +8,4 @@ obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o
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obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o
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obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o
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obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o
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obj-$(CONFIG_LED_CORTINA) += led_cortina.o
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298
drivers/led/led_cortina.c
Normal file
298
drivers/led/led_cortina.c
Normal file
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@ -0,0 +1,298 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Cortina-Access
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* Author: Jway Lin <jway.lin@cortina-access.com>
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*
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <led.h>
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#include <log.h>
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#include <asm/io.h>
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#include <dm/lists.h>
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#include <linux/bitops.h>
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#define LED_MAX_HW_BLINK 127
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#define LED_MAX_COUNT 16
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/* LED_CONTROL fields */
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#define LED_BLINK_RATE1_SHIFT 0
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#define LED_BLINK_RATE1_MASK 0xff
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#define LED_BLINK_RATE2_SHIFT 8
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#define LED_BLINK_RATE2_MASK 0xff
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#define LED_CLK_TEST BIT(16)
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#define LED_CLK_POLARITY BIT(17)
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#define LED_CLK_TEST_MODE BIT(16)
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#define LED_CLK_TEST_RX_TEST BIT(30)
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#define LED_CLK_TEST_TX_TEST BIT(31)
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/* LED_CONFIG fields */
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#define LED_EVENT_ON_SHIFT 0
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#define LED_EVENT_ON_MASK 0x7
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#define LED_EVENT_BLINK_SHIFT 3
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#define LED_EVENT_BLINK_MASK 0x7
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#define LED_EVENT_OFF_SHIFT 6
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#define LED_EVENT_OFF_MASK 0x7
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#define LED_OFF_ON_SHIFT 9
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#define LED_OFF_ON_MASK 0x3
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#define LED_PORT_SHIFT 11
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#define LED_PORT_MASK 0x7
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#define LED_OFF_VAL BIT(14)
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#define LED_SW_EVENT BIT(15)
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#define LED_BLINK_SEL BIT(16)
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/* LED_CONFIG structures */
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struct cortina_led_cfg {
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void __iomem *regs;
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u32 pin; /* LED pin nubmer */
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bool active_low; /*Active-High or Active-Low*/
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u32 off_event; /* set led off event (RX,TX,SW)*/
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u32 blink_event; /* set led blink event (RX,TX,SW)*/
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u32 on_event; /* set led on event (RX,TX,SW)*/
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u32 port; /* corresponding ethernet port */
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int blink_sel; /* select blink-rate1 or blink-rate2 */
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};
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/* LED_control structures */
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struct cortina_led_platdata {
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void __iomem *ctrl_regs;
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u16 rate1; /* blink rate setting 0 */
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u16 rate2; /* blink rate setting 1 */
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};
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enum ca_led_state_t {
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CA_EVENT_MODE = 0,
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CA_LED_ON = 1,
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CA_LED_OFF,
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};
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static void cortina_led_write(void __iomem *reg, unsigned long data)
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{
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writel(data, reg);
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}
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static unsigned long cortina_led_read(void __iomem *reg)
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{
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return readl(reg);
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}
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static enum led_state_t cortina_led_get_state(struct udevice *dev)
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{
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struct cortina_led_cfg *priv = dev_get_priv(dev);
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enum led_state_t state = LEDST_OFF;
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u32 val;
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val = readl(priv->regs);
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if (val & LED_SW_EVENT)
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state = LEDST_ON;
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return state;
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}
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static int cortina_led_set_state(struct udevice *dev, enum led_state_t state)
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{
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u32 val;
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struct cortina_led_cfg *priv = dev_get_priv(dev);
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val = readl(priv->regs);
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val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
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switch (state) {
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case LEDST_OFF:
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val &= ~LED_SW_EVENT;
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val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
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cortina_led_write(priv->regs, val);
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break;
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case LEDST_ON:
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val |= LED_SW_EVENT;
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val |= CA_LED_ON << LED_OFF_ON_SHIFT;
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cortina_led_write(priv->regs, val);
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break;
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case LEDST_TOGGLE:
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if (cortina_led_get_state(dev) == LEDST_OFF)
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return cortina_led_set_state(dev, LEDST_ON);
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else
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return cortina_led_set_state(dev, LEDST_OFF);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct led_ops cortina_led_ops = {
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.get_state = cortina_led_get_state,
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.set_state = cortina_led_set_state,
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};
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static int ca_led_ofdata_to_platdata(struct udevice *dev)
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{
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struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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/* Top-level LED node */
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if (!uc_plat->label) {
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struct cortina_led_platdata *plt = dev_get_platdata(dev);
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plt->rate1 =
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dev_read_u32_default(dev, "Cortina,blink-rate1", 256);
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plt->rate2 =
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dev_read_u32_default(dev, "Cortina,blink-rate2", 512);
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plt->ctrl_regs = dev_remap_addr(dev);
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} else {
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struct cortina_led_cfg *priv = dev_get_priv(dev);
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priv->regs = dev_remap_addr(dev_get_parent(dev));
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priv->pin = dev_read_u32_default(dev, "pin", LED_MAX_COUNT);
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priv->blink_sel = dev_read_u32_default(dev, "blink-sel", 0);
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priv->off_event = dev_read_u32_default(dev, "off-event", 0);
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priv->blink_event = dev_read_u32_default(dev, "blink-event", 0);
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priv->on_event = dev_read_u32_default(dev, "on-event", 0);
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priv->port = dev_read_u32_default(dev, "port", 0);
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if (dev_read_bool(dev, "active-low"))
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priv->active_low = true;
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else
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priv->active_low = false;
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}
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return 0;
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}
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static int cortina_led_probe(struct udevice *dev)
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{
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struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
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/* Top-level LED node */
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if (!uc_plat->label) {
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struct cortina_led_platdata *platdata = dev_get_platdata(dev);
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u32 reg_value, val;
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u16 rate1, rate2;
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if (!platdata->ctrl_regs)
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return -EINVAL;
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reg_value = 0;
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reg_value |= LED_CLK_POLARITY;
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rate1 = platdata->rate1;
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rate2 = platdata->rate2;
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val = rate1 / 16 - 1;
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rate1 = val > LED_MAX_HW_BLINK ?
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LED_MAX_HW_BLINK : val;
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reg_value |= (rate1 & LED_BLINK_RATE1_MASK) <<
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LED_BLINK_RATE1_SHIFT;
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val = rate2 / 16 - 1;
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rate2 = val > LED_MAX_HW_BLINK ?
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LED_MAX_HW_BLINK : val;
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reg_value |= (rate2 & LED_BLINK_RATE2_MASK) <<
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LED_BLINK_RATE2_SHIFT;
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cortina_led_write(platdata->ctrl_regs, reg_value);
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} else {
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struct cortina_led_cfg *priv = dev_get_priv(dev);
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void __iomem *regs;
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u32 val, port, off_event, blink_event, on_event;
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regs = priv->regs;
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if (!regs)
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return -EINVAL;
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if (priv->pin >= LED_MAX_COUNT)
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return -EINVAL;
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priv->regs = regs + 4 + priv->pin * 4;
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val = cortina_led_read(priv->regs);
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if (priv->active_low)
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val |= LED_OFF_VAL;
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else
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val &= ~LED_OFF_VAL;
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if (priv->blink_sel == 0)
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val &= ~LED_BLINK_SEL;
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else if (priv->blink_sel == 1)
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val |= LED_BLINK_SEL;
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off_event = priv->off_event;
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val &= ~(LED_EVENT_OFF_MASK << LED_EVENT_OFF_SHIFT);
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if (off_event != 0)
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val |= BIT(off_event) << LED_EVENT_OFF_SHIFT;
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blink_event = priv->blink_event;
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val &= ~(LED_EVENT_BLINK_MASK << LED_EVENT_BLINK_SHIFT);
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if (blink_event != 0)
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val |= BIT(blink_event) << LED_EVENT_BLINK_SHIFT;
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on_event = priv->on_event;
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val &= ~(LED_EVENT_ON_MASK << LED_EVENT_ON_SHIFT);
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if (on_event != 0)
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val |= BIT(on_event) << LED_EVENT_ON_SHIFT;
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port = priv->port;
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val &= ~(LED_PORT_MASK << LED_PORT_SHIFT);
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val |= port << LED_PORT_SHIFT;
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/* force off */
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val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
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val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
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cortina_led_write(priv->regs, val);
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}
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return 0;
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}
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static int cortina_led_bind(struct udevice *parent)
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{
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ofnode node;
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dev_for_each_subnode(node, parent) {
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struct led_uc_plat *uc_plat;
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struct udevice *dev;
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const char *label;
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int ret;
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label = ofnode_read_string(node, "label");
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if (!label) {
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debug("%s: node %s has no label\n", __func__,
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ofnode_get_name(node));
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return -EINVAL;
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}
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ret = device_bind_driver_to_node(parent, "ca-leds",
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ofnode_get_name(node),
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node, &dev);
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if (ret)
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return ret;
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uc_plat = dev_get_uclass_platdata(dev);
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uc_plat->label = label;
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}
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return 0;
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}
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static const struct udevice_id ca_led_ids[] = {
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{ .compatible = "cortina,ca-leds" },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(cortina_led) = {
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.name = "ca-leds",
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.id = UCLASS_LED,
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.of_match = ca_led_ids,
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.ofdata_to_platdata = ca_led_ofdata_to_platdata,
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.bind = cortina_led_bind,
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.probe = cortina_led_probe,
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.platdata_auto_alloc_size = sizeof(struct cortina_led_platdata),
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.priv_auto_alloc_size = sizeof(struct cortina_led_cfg),
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.ops = &cortina_led_ops,
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};
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