299 lines
6.9 KiB
C
299 lines
6.9 KiB
C
// 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_plat {
|
|
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_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct led_uc_plat *uc_plat = dev_get_uclass_plat(dev);
|
|
|
|
/* Top-level LED node */
|
|
if (!uc_plat->label) {
|
|
struct cortina_led_plat *plt = dev_get_plat(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_plat(dev);
|
|
|
|
/* Top-level LED node */
|
|
if (!uc_plat->label) {
|
|
struct cortina_led_plat *plat = dev_get_plat(dev);
|
|
u32 reg_value, val;
|
|
u16 rate1, rate2;
|
|
|
|
if (!plat->ctrl_regs)
|
|
return -EINVAL;
|
|
|
|
reg_value = 0;
|
|
reg_value |= LED_CLK_POLARITY;
|
|
|
|
rate1 = plat->rate1;
|
|
rate2 = plat->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(plat->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_plat(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,
|
|
.of_to_plat = ca_led_of_to_plat,
|
|
.bind = cortina_led_bind,
|
|
.probe = cortina_led_probe,
|
|
.plat_auto = sizeof(struct cortina_led_plat),
|
|
.priv_auto = sizeof(struct cortina_led_cfg),
|
|
.ops = &cortina_led_ops,
|
|
};
|