0f2dd1eff9
Split `i2c.h` into three pieces to ease reuse of the generic defi-
nitions. No code is changed.
* `i2c.h` - keeps the generic definitions
* `i2c_simple.h` - holds the current, limited to one controller driver
per board, devicetree independent I2C interface
* `i2c_bus.h` - will become the devicetree compatible interface for
native I2C (e.g. non-SMBus) controllers
Change-Id: I382d45c70f9314588663e1284f264f877469c74d
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/20845
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2015 MediaTek Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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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#include <console/console.h>
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#include <device/i2c_simple.h>
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#include <soc/da9212.h>
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enum {
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DA9212_SLAVE_ADDR = 0x68,
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};
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static void da9212_hw_init(uint8_t i2c_num, unsigned char variant_id)
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{
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int ret = 0;
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int buck_mode = DA9212_BUCK_MODE_AUTO;
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if (variant_id == DA9212_VARIANT_ID_AB)
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buck_mode = DA9212_BUCK_MODE_PWM;
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/* page select to 0 */
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_PAGE_CON, DA9212_REG_PAGE0,
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DA9212_REG_PAGE_MASK, DA9212_REG_PAGE_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKA_CONT, DA9212_BUCK_GPI_GPIO1,
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DA9212_BUCK_GPI_MASK, DA9212_BUCK_GPI_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKB_CONT, DA9212_BUCK_GPI_OFF,
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DA9212_BUCK_GPI_OFF, DA9212_BUCK_GPI_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKA_CONT, DA9212_VBUCK_SEL_A,
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DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKB_CONT, DA9212_VBUCK_SEL_A,
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DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKA_CONF, buck_mode,
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DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_BUCKB_CONF, buck_mode,
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DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
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if (ret)
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printk(BIOS_ERR, "ERROR: %s failed\n", __func__);
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}
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void da9212_probe(uint8_t i2c_num)
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{
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int ret = 0;
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unsigned char device_id = 0;
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unsigned char variant_id = 0;
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/* select to page 4, clear REVERT at first time */
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ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_PAGE_CON, DA9212_REG_PAGE4,
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0xF, DA9212_REG_PAGE_SHIFT);
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ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_DEVICE_ID, &device_id,
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0xFF, 0);
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ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
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DA9212_REG_VARIANT_ID, &variant_id,
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0xFF, 0);
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printk(BIOS_INFO, "%s: device ID = %#x, variant ID = %#x\n", __func__,
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device_id, variant_id);
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/* Check device ID is DA9212 */
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if (device_id != DA9212_ID || ret) {
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printk(BIOS_ERR, "ERROR: unknown DA9212 device_id\n");
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return;
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}
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da9212_hw_init(i2c_num, variant_id);
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}
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