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>
131 lines
4.2 KiB
C
131 lines
4.2 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/mt6311.h>
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enum {
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MT6311_SLAVE_ADDR = 0x6B,
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};
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static u32 get_mt6311_chip_id(uint8_t i2c_num)
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{
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unsigned char id[2] = {0};
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i2c_read_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_CID,
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&id[0], 0xFF, 0);
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i2c_read_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_SWCID,
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&id[1], 0xFF, 0);
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return (u32)(id[0] << 8 | id[1]);
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}
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static void mt6311_hw_init(uint8_t i2c_num)
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{
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int ret = 0;
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unsigned char var[3] = {0};
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/*
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* Phase Shedding Trim Software Setting
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* The phase 2 of MT6311 will enter PWM mode if the threshold is
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* reached.
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* The threshold is set according to EFUSE value.
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*/
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ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_EFUSE_DOUT_56_63, &var[0],
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0x3, 1);
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ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_EFUSE_DOUT_56_63, &var[1],
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0x1, 7);
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ret |= i2c_read_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_EFUSE_DOUT_64_71, &var[2],
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0x1, 0);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS1_ANA_CON10,
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var[0] | var[1] << 2 | var[2] << 3, 0xf, 0);
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/* I2C_CONFIG; pushpull setting, Opendrain is '0' */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_TOP_INT_CON,
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0x1, 0x1, 2);
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/* RG_WDTRSTB_EN; CC, initial WDRSTB setting. */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_TOP_RST_CON,
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0x1, 0x1, 5);
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/* initial INT function */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_GPIO_MODE,
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0x1, 0x7, 3);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR, MT6311_STRUP_CON5,
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0, 1 << 2 | 1 << 1 | 1 << 0, 0);
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/* Vo max is 1.15V */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_STRUP_ANA_CON1, 0x3, 0x3, 5);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_BUCK_ALL_CON23, 0x1, 0x1, 0);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_STRUP_ANA_CON2, 0x3, 0x3, 0);
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/* Suspend HW control from SPM */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_TOP_CON, 0x1, 0x1, 0);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON7, 0x1, 0x1, 0);
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/* default VDVFS power on */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON9, 0x1, 0x1, 0);
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/* for DVFS slew rate rising=0.67us */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON10, 0x1, 0x7f, 0);
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/* for DVFS slew rate, falling 2.0us */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON11, 0x5, 0x7f, 0);
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/* default VDVFS11_VOSEL 1.0V, SW control */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON12, 0x40, 0x7f, 0);
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/* default VDVFS11_VOSEL_ON 1.0V, HW control */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON13, 0x40, 0x7f, 0);
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON14, 0x40, 0x7f, 0);
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/* for DVFS sof change, falling 50us */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON19, 0x3, 0x3, 0);
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/* for DVFS sof change, falling only */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_VDVFS11_CON19, 0x1, 0x3, 4);
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/* OFF LDO */
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ret |= i2c_write_field(i2c_num, MT6311_SLAVE_ADDR,
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MT6311_LDO_CON3, 0, 0x1, 0);
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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 mt6311_probe(uint8_t i2c_num)
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{
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u32 val = 0;
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/* Check device ID is MT6311 */
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val = get_mt6311_chip_id(i2c_num);
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printk(BIOS_INFO, "%s: device ID = %#x\n", __func__, val);
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if (val < MT6311_E1_CID_CODE) {
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printk(BIOS_ERR, "ERROR: unknown MT6311 device_id\n");
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return;
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}
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mt6311_hw_init(i2c_num);
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}
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