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/*
* Copyright (C) 2016 Zodiac Inflight Innovation
* Author: Andrey Smirnov <andrew.smirnov@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <envfs.h>
#include <fs.h>
#include <gpio.h>
#include <i2c/i2c.h>
#include <init.h>
#include <mach/bbu.h>
#include <mach/imx6.h>
#include <net.h>
#include <linux/nvmem-consumer.h>
#define RDU2_DAC1_RESET IMX_GPIO_NR(1, 0)
#define RDU2_DAC2_RESET IMX_GPIO_NR(1, 2)
#define RDU2_RST_TOUCH IMX_GPIO_NR(1, 7)
#define RDU2_NFC_RESET IMX_GPIO_NR(1, 17)
#define RDU2_HPA1_SDn IMX_GPIO_NR(1, 4)
#define RDU2_HPA2_SDn IMX_GPIO_NR(1, 5)
static const struct gpio rdu2_reset_gpios[] = {
{
.gpio = RDU2_DAC1_RESET,
.flags = GPIOF_OUT_INIT_LOW,
.label = "dac1-reset",
},
{
.gpio = RDU2_DAC2_RESET,
.flags = GPIOF_OUT_INIT_LOW,
.label = "dac2-reset",
},
{
.gpio = RDU2_RST_TOUCH,
.flags = GPIOF_OUT_INIT_LOW,
.label = "rst-touch#",
},
{
.gpio = RDU2_NFC_RESET,
.flags = GPIOF_OUT_INIT_HIGH,
.label = "nfc-reset",
},
{
.gpio = RDU2_HPA1_SDn,
.flags = GPIOF_OUT_INIT_LOW,
.label = "hpa1-sd-n",
},
{
.gpio = RDU2_HPA2_SDn,
.flags = GPIOF_OUT_INIT_LOW,
.label = "hpa2n-sd-n",
},
};
static int rdu2_reset_audio_touchscreen_nfc(void)
{
int ret;
if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") &&
!of_machine_is_compatible("zii,imx6qp-zii-rdu2"))
return 0;
ret = gpio_request_array(rdu2_reset_gpios,
ARRAY_SIZE(rdu2_reset_gpios));
if (ret) {
pr_err("Failed to request RDU2 reset gpios: %s\n",
strerror(-ret));
return ret;
}
mdelay(100);
gpio_direction_output(RDU2_DAC1_RESET, 1);
gpio_direction_output(RDU2_DAC2_RESET, 1);
gpio_direction_output(RDU2_RST_TOUCH, 1);
gpio_direction_output(RDU2_NFC_RESET, 0);
gpio_direction_output(RDU2_HPA1_SDn, 1);
gpio_direction_output(RDU2_HPA2_SDn, 1);
mdelay(100);
return 0;
}
/*
* When this function is called "hog" pingroup in device tree needs to
* be already initialized
*/
late_initcall(rdu2_reset_audio_touchscreen_nfc);
static int rdu2_devices_init(void)
{
struct i2c_client client;
if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") &&
!of_machine_is_compatible("zii,imx6qp-zii-rdu2"))
return 0;
client.adapter = i2c_get_adapter(1);
if (client.adapter) {
u8 reg;
/*
* Reset PMIC SW1AB and SW1C rails to 1.375V. If an event
* caused only the i.MX6 SoC reset, the PMIC might still be
* stuck on the low voltage for the slow operating point.
*/
client.addr = 0x08; /* PMIC i2c address */
reg = 0x2b; /* 1.375V, valid for both rails */
i2c_write_reg(&client, 0x20, ®, 1);
i2c_write_reg(&client, 0x2e, ®, 1);
}
barebox_set_hostname("rdu2");
imx6_bbu_internal_spi_i2c_register_handler("SPI", "/dev/m25p0.barebox",
BBU_HANDLER_FLAG_DEFAULT);
imx6_bbu_internal_mmcboot_register_handler("eMMC", "/dev/mmc3", 0);
defaultenv_append_directory(defaultenv_rdu2);
return 0;
}
device_initcall(rdu2_devices_init);
static int rdu2_eth_register_ethaddr(struct device_node *np)
{
u8 mac[ETH_ALEN];
u8 *data;
int i;
data = nvmem_cell_get_and_read(np, "mac-address", ETH_ALEN);
if (IS_ERR(data))
return PTR_ERR(data);
/*
* EEPROM stores MAC address in reverse (to what we expect it
* to be) byte order.
*/
for (i = 0; i < ETH_ALEN; i++)
mac[i] = data[ETH_ALEN - i - 1];
free(data);
of_eth_register_ethaddr(np, mac);
return 0;
}
static int rdu2_ethernet_init(void)
{
const char *aliases[] = { "ethernet0", "ethernet1" };
struct device_node *np, *root;
int i, ret;
if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") &&
!of_machine_is_compatible("zii,imx6qp-zii-rdu2"))
return 0;
root = of_get_root_node();
for (i = 0; i < ARRAY_SIZE(aliases); i++) {
const char *alias = aliases[i];
np = of_find_node_by_alias(root, alias);
if (!np) {
pr_warn("Failed to find %s\n", alias);
continue;
}
ret = rdu2_eth_register_ethaddr(np);
if (ret) {
pr_warn("Failed to register MAC for %s\n", alias);
continue;
}
}
return 0;
}
late_initcall(rdu2_ethernet_init);
#define I210_CFGWORD_PCIID_157B 0x157b1a11
static int rdu2_i210_invm(void)
{
int fd;
u32 val;
if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") &&
!of_machine_is_compatible("zii,imx6qp-zii-rdu2"))
return 0;
fd = open("/dev/e1000-invm0", O_RDWR);
if (fd < 0) {
pr_err("could not open e1000 iNVM device!\n");
return fd;
}
pread(fd, &val, sizeof(val), 0);
if (val == I210_CFGWORD_PCIID_157B) {
pr_debug("i210 already programmed correctly\n");
return 0;
}
val = I210_CFGWORD_PCIID_157B;
pwrite(fd, &val, sizeof(val), 0);
return 0;
}
late_initcall(rdu2_i210_invm);
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