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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 2020-06-30 21:08:06 -07:00 committed by Tom Rini
parent e1ecfc1262
commit 047e31ed4b
4 changed files with 310 additions and 1 deletions
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4
MAINTAINERS
View File

@ -181,6 +181,7 @@ F: board/cortina/common/
F: drivers/gpio/cortina_gpio.c
F: drivers/watchdog/cortina_wdt.c
F: drivers/serial/serial_cortina.c
F: drivers/led/led_cortina.c
F: drivers/mmc/ca_dw_mmc.c
F: drivers/i2c/i2c-cortina.c
F: drivers/i2c/i2c-cortina.h
@ -766,6 +767,7 @@ F: board/cortina/common/
F: drivers/gpio/cortina_gpio.c
F: drivers/watchdog/cortina_wdt.c
F: drivers/serial/serial_cortina.c
F: drivers/led/led_cortina.c
F: drivers/mmc/ca_dw_mmc.c
F: drivers/i2c/i2c-cortina.c
F: drivers/i2c/i2c-cortina.h
@ -868,7 +870,7 @@ S: Maintained
F: arch/powerpc/
POWERPC MPC8XX
M: Christophe Leroy <christophe.leroy@csgroup.eu>
M: Christophe Leroy <christophe.leroy@c-s.fr>
S: Maintained
T: git https://gitlab.denx.de/u-boot/custodians/u-boot-mpc8xx.git
F: arch/powerpc/cpu/mpc8xx/

8
drivers/led/Kconfig
View File

@ -35,6 +35,14 @@ config LED_BCM6858
This option enables support for LEDs connected to the BCM6858
HW has blinking capabilities and up to 32 LEDs can be controlled.
config LED_CORTINA
bool "LED Support for Cortina Access CAxxxx SoCs"
depends on LED && (CORTINA_PLATFORM)
help
This option enables support for LEDs connected to the Cortina
Access CAxxxx SOCs.
config LED_BLINK
bool "Support LED blinking"
depends on LED

1
drivers/led/Makefile
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@ -8,3 +8,4 @@ obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o
obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o
obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o
obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o
obj-$(CONFIG_LED_CORTINA) += led_cortina.o

298
drivers/led/led_cortina.c Normal file
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@ -0,0 +1,298 @@
// 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,
};