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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2020 Cortina-Access
- * Author: Jway Lin <jway.lin@cortina-access.com>
- *
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <led.h>
- #include <log.h>
- #include <asm/io.h>
- #include <dm/lists.h>
- #include <linux/bitops.h>
- #define LED_MAX_HW_BLINK 127
- #define LED_MAX_COUNT 16
- /* LED_CONTROL fields */
- #define LED_BLINK_RATE1_SHIFT 0
- #define LED_BLINK_RATE1_MASK 0xff
- #define LED_BLINK_RATE2_SHIFT 8
- #define LED_BLINK_RATE2_MASK 0xff
- #define LED_CLK_TEST BIT(16)
- #define LED_CLK_POLARITY BIT(17)
- #define LED_CLK_TEST_MODE BIT(16)
- #define LED_CLK_TEST_RX_TEST BIT(30)
- #define LED_CLK_TEST_TX_TEST BIT(31)
- /* LED_CONFIG fields */
- #define LED_EVENT_ON_SHIFT 0
- #define LED_EVENT_ON_MASK 0x7
- #define LED_EVENT_BLINK_SHIFT 3
- #define LED_EVENT_BLINK_MASK 0x7
- #define LED_EVENT_OFF_SHIFT 6
- #define LED_EVENT_OFF_MASK 0x7
- #define LED_OFF_ON_SHIFT 9
- #define LED_OFF_ON_MASK 0x3
- #define LED_PORT_SHIFT 11
- #define LED_PORT_MASK 0x7
- #define LED_OFF_VAL BIT(14)
- #define LED_SW_EVENT BIT(15)
- #define LED_BLINK_SEL BIT(16)
- /* LED_CONFIG structures */
- struct cortina_led_cfg {
- void __iomem *regs;
- u32 pin; /* LED pin nubmer */
- bool active_low; /*Active-High or Active-Low*/
- u32 off_event; /* set led off event (RX,TX,SW)*/
- u32 blink_event; /* set led blink event (RX,TX,SW)*/
- u32 on_event; /* set led on event (RX,TX,SW)*/
- u32 port; /* corresponding ethernet port */
- int blink_sel; /* select blink-rate1 or blink-rate2 */
- };
- /* LED_control structures */
- struct cortina_led_platdata {
- void __iomem *ctrl_regs;
- u16 rate1; /* blink rate setting 0 */
- u16 rate2; /* blink rate setting 1 */
- };
- enum ca_led_state_t {
- CA_EVENT_MODE = 0,
- CA_LED_ON = 1,
- CA_LED_OFF,
- };
- static void cortina_led_write(void __iomem *reg, unsigned long data)
- {
- writel(data, reg);
- }
- static unsigned long cortina_led_read(void __iomem *reg)
- {
- return readl(reg);
- }
- static enum led_state_t cortina_led_get_state(struct udevice *dev)
- {
- struct cortina_led_cfg *priv = dev_get_priv(dev);
- enum led_state_t state = LEDST_OFF;
- u32 val;
- val = readl(priv->regs);
- if (val & LED_SW_EVENT)
- state = LEDST_ON;
- return state;
- }
- static int cortina_led_set_state(struct udevice *dev, enum led_state_t state)
- {
- u32 val;
- struct cortina_led_cfg *priv = dev_get_priv(dev);
- val = readl(priv->regs);
- val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
- switch (state) {
- case LEDST_OFF:
- val &= ~LED_SW_EVENT;
- val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
- cortina_led_write(priv->regs, val);
- break;
- case LEDST_ON:
- val |= LED_SW_EVENT;
- val |= CA_LED_ON << LED_OFF_ON_SHIFT;
- cortina_led_write(priv->regs, val);
- break;
- case LEDST_TOGGLE:
- if (cortina_led_get_state(dev) == LEDST_OFF)
- return cortina_led_set_state(dev, LEDST_ON);
- else
- return cortina_led_set_state(dev, LEDST_OFF);
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static const struct led_ops cortina_led_ops = {
- .get_state = cortina_led_get_state,
- .set_state = cortina_led_set_state,
- };
- static int ca_led_ofdata_to_platdata(struct udevice *dev)
- {
- struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
- /* Top-level LED node */
- if (!uc_plat->label) {
- struct cortina_led_platdata *plt = dev_get_platdata(dev);
- plt->rate1 =
- dev_read_u32_default(dev, "Cortina,blink-rate1", 256);
- plt->rate2 =
- dev_read_u32_default(dev, "Cortina,blink-rate2", 512);
- plt->ctrl_regs = dev_remap_addr(dev);
- } else {
- struct cortina_led_cfg *priv = dev_get_priv(dev);
- priv->regs = dev_remap_addr(dev_get_parent(dev));
- priv->pin = dev_read_u32_default(dev, "pin", LED_MAX_COUNT);
- priv->blink_sel = dev_read_u32_default(dev, "blink-sel", 0);
- priv->off_event = dev_read_u32_default(dev, "off-event", 0);
- priv->blink_event = dev_read_u32_default(dev, "blink-event", 0);
- priv->on_event = dev_read_u32_default(dev, "on-event", 0);
- priv->port = dev_read_u32_default(dev, "port", 0);
- if (dev_read_bool(dev, "active-low"))
- priv->active_low = true;
- else
- priv->active_low = false;
- }
- return 0;
- }
- static int cortina_led_probe(struct udevice *dev)
- {
- struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
- /* Top-level LED node */
- if (!uc_plat->label) {
- struct cortina_led_platdata *platdata = dev_get_platdata(dev);
- u32 reg_value, val;
- u16 rate1, rate2;
- if (!platdata->ctrl_regs)
- return -EINVAL;
- reg_value = 0;
- reg_value |= LED_CLK_POLARITY;
- rate1 = platdata->rate1;
- rate2 = platdata->rate2;
- val = rate1 / 16 - 1;
- rate1 = val > LED_MAX_HW_BLINK ?
- LED_MAX_HW_BLINK : val;
- reg_value |= (rate1 & LED_BLINK_RATE1_MASK) <<
- LED_BLINK_RATE1_SHIFT;
- val = rate2 / 16 - 1;
- rate2 = val > LED_MAX_HW_BLINK ?
- LED_MAX_HW_BLINK : val;
- reg_value |= (rate2 & LED_BLINK_RATE2_MASK) <<
- LED_BLINK_RATE2_SHIFT;
- cortina_led_write(platdata->ctrl_regs, reg_value);
- } else {
- struct cortina_led_cfg *priv = dev_get_priv(dev);
- void __iomem *regs;
- u32 val, port, off_event, blink_event, on_event;
- regs = priv->regs;
- if (!regs)
- return -EINVAL;
- if (priv->pin >= LED_MAX_COUNT)
- return -EINVAL;
- priv->regs = regs + 4 + priv->pin * 4;
- val = cortina_led_read(priv->regs);
- if (priv->active_low)
- val |= LED_OFF_VAL;
- else
- val &= ~LED_OFF_VAL;
- if (priv->blink_sel == 0)
- val &= ~LED_BLINK_SEL;
- else if (priv->blink_sel == 1)
- val |= LED_BLINK_SEL;
- off_event = priv->off_event;
- val &= ~(LED_EVENT_OFF_MASK << LED_EVENT_OFF_SHIFT);
- if (off_event != 0)
- val |= BIT(off_event) << LED_EVENT_OFF_SHIFT;
- blink_event = priv->blink_event;
- val &= ~(LED_EVENT_BLINK_MASK << LED_EVENT_BLINK_SHIFT);
- if (blink_event != 0)
- val |= BIT(blink_event) << LED_EVENT_BLINK_SHIFT;
- on_event = priv->on_event;
- val &= ~(LED_EVENT_ON_MASK << LED_EVENT_ON_SHIFT);
- if (on_event != 0)
- val |= BIT(on_event) << LED_EVENT_ON_SHIFT;
- port = priv->port;
- val &= ~(LED_PORT_MASK << LED_PORT_SHIFT);
- val |= port << LED_PORT_SHIFT;
- /* force off */
- val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_SHIFT);
- val |= CA_LED_OFF << LED_OFF_ON_SHIFT;
- cortina_led_write(priv->regs, val);
- }
- return 0;
- }
- static int cortina_led_bind(struct udevice *parent)
- {
- ofnode node;
- dev_for_each_subnode(node, parent) {
- struct led_uc_plat *uc_plat;
- struct udevice *dev;
- const char *label;
- int ret;
- label = ofnode_read_string(node, "label");
- if (!label) {
- debug("%s: node %s has no label\n", __func__,
- ofnode_get_name(node));
- return -EINVAL;
- }
- ret = device_bind_driver_to_node(parent, "ca-leds",
- ofnode_get_name(node),
- node, &dev);
- if (ret)
- return ret;
- uc_plat = dev_get_uclass_platdata(dev);
- uc_plat->label = label;
- }
- return 0;
- }
- static const struct udevice_id ca_led_ids[] = {
- { .compatible = "cortina,ca-leds" },
- { /* sentinel */ }
- };
- U_BOOT_DRIVER(cortina_led) = {
- .name = "ca-leds",
- .id = UCLASS_LED,
- .of_match = ca_led_ids,
- .ofdata_to_platdata = ca_led_ofdata_to_platdata,
- .bind = cortina_led_bind,
- .probe = cortina_led_probe,
- .platdata_auto_alloc_size = sizeof(struct cortina_led_platdata),
- .priv_auto_alloc_size = sizeof(struct cortina_led_cfg),
- .ops = &cortina_led_ops,
- };
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