123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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* Copyright (C) 2013 Michael Burkey
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* Based on code (C) Sascha Hauer, Pengutronix
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* Based on code (C) Variscite, Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation.
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*
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*/
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#define pr_fmt(fmt) "var-som-mx6: " fmt
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#include <common.h>
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#include <gpio.h>
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#include <init.h>
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#include <of.h>
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#include <debug_ll.h>
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#include <environment.h>
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#include <asm/armlinux.h>
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#include <generated/mach-types.h>
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#include <partition.h>
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#include <asm/io.h>
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#include <asm/mmu.h>
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#include <mach/generic.h>
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#include <sizes.h>
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#include <mach/imx6.h>
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#include <mach/devices-imx6.h>
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#include <mach/iomux-mx6.h>
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#include <spi/spi.h>
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#include <mach/spi.h>
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#include <i2c/i2c.h>
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#define ETH_PHY_RST IMX_GPIO_NR(1, 25)
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static int setup_pmic_voltages(void)
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{
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unsigned char value, rev_id = 0 ;
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struct i2c_adapter *adapter = NULL;
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struct i2c_client client;
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int addr = -1, ret, bus = 0;
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/* I2C2 bus (2-1 = 1 in barebox numbering) */
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bus = 1;
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/* PFUZE100 device address is 0x08 */
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addr = 0x08;
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adapter = i2c_get_adapter(bus);
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if (!adapter) {
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pr_err("i2c bus %d not found\n", bus);
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return -ENODEV;
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}
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client.adapter = adapter;
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client.addr = addr;
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/* Attempt to locate the PFUZE100 chip. */
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if (i2c_read_reg(&client, 0x00, &value, 1) != 1) {
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pr_err("Read device ID error!\n");
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return -1;
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}
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if (i2c_read_reg(&client, 0x03, &rev_id, 1) != 1) {
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pr_err("Read Rev ID error!\n");
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return -1;
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}
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pr_info("Found PFUZE100! deviceid=%x,revid=%x\n", value, rev_id);
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/* Set Gigabit Ethernet voltage (SOM v1.1/1.0)*/
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value = 0x60;
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ret = i2c_write_reg(&client, 0x4a, &value, 1);
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/* set VGEN3 to 2.5V */
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value = 0x77;
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if (i2c_write_reg(&client, 0x6e, &value, 1) != 1) {
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pr_err("Set VGEN3 error!\n");
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return -EIO;
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}
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return 0;
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}
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static int eth_phy_reset(void)
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{
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gpio_request(ETH_PHY_RST, "phy reset");
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gpio_direction_output(ETH_PHY_RST, 0);
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mdelay(1);
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gpio_set_value(ETH_PHY_RST, 1);
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return 0;
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}
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static int variscite_custom_init(void)
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{
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if (!of_machine_is_compatible("variscite,imx6q-custom"))
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return 0;
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barebox_set_hostname("var-som-mx6");
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setup_pmic_voltages();
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eth_phy_reset();
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armlinux_set_architecture(MACH_TYPE_VAR_SOM_MX6);
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pr_debug("Completing custom_init()\n");
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return 0;
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}
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device_initcall(variscite_custom_init);
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