| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2014 - 2015 The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <assert.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/i2c_simple.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <soc/blsp.h> |
| #include <soc/qup.h> |
| #include <soc/gpio.h> |
| |
| static qup_config_t blsp1_qup0_config = { |
| QUP_MINICORE_I2C_MASTER, |
| 100000, |
| 19050000, |
| QUP_MODE_BLOCK, |
| 0 |
| }; |
| |
| static qup_config_t blsp1_qup1_config = { |
| QUP_MINICORE_I2C_MASTER, |
| 100000, |
| 19050000, |
| QUP_MODE_BLOCK, |
| 0 |
| }; |
| |
| static qup_config_t blsp1_qup2_config = { |
| QUP_MINICORE_I2C_MASTER, |
| 100000, |
| 19050000, |
| QUP_MODE_BLOCK, |
| 0 |
| }; |
| |
| static qup_config_t blsp1_qup3_config = { |
| QUP_MINICORE_I2C_MASTER, |
| 100000, |
| 19050000, |
| QUP_MODE_BLOCK, |
| 0 |
| }; |
| |
| static int i2c_read(uint32_t gsbi_id, uint8_t slave, |
| uint8_t *data, int data_len) |
| { |
| qup_data_t obj; |
| qup_return_t qup_ret = 0; |
| |
| memset(&obj, 0, sizeof(obj)); |
| obj.protocol = QUP_MINICORE_I2C_MASTER; |
| obj.p.iic.addr = slave; |
| obj.p.iic.data_len = data_len; |
| obj.p.iic.data = data; |
| qup_ret = qup_recv_data(gsbi_id, &obj); |
| |
| if (QUP_SUCCESS != qup_ret) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int i2c_write(uint32_t gsbi_id, uint8_t slave, |
| uint8_t *data, int data_len, uint8_t stop_seq) |
| { |
| qup_data_t obj; |
| qup_return_t qup_ret = 0; |
| |
| memset(&obj, 0, sizeof(obj)); |
| obj.protocol = QUP_MINICORE_I2C_MASTER; |
| obj.p.iic.addr = slave; |
| obj.p.iic.data_len = data_len; |
| obj.p.iic.data = data; |
| qup_ret = qup_send_data(gsbi_id, &obj, stop_seq); |
| |
| if (QUP_SUCCESS != qup_ret) |
| return 1; |
| else |
| return 0; |
| } |
| |
| static int i2c_init(blsp_qup_id_t id) |
| { |
| qup_config_t *qup_config; |
| |
| switch (id) { |
| case BLSP_QUP_ID_0: |
| qup_config = &blsp1_qup0_config; |
| break; |
| case BLSP_QUP_ID_1: |
| qup_config = &blsp1_qup1_config; |
| break; |
| case BLSP_QUP_ID_2: |
| qup_config = &blsp1_qup2_config; |
| break; |
| case BLSP_QUP_ID_3: |
| qup_config = &blsp1_qup3_config; |
| break; |
| default: |
| printk(BIOS_ERR, "QUP configuration not defined for BLSP%d.\n", |
| id); |
| return 1; |
| } |
| |
| if (qup_config->initialized) |
| return 0; |
| |
| if (blsp_i2c_init(id)) { |
| printk(BIOS_ERR, "failed to initialize blsp\n"); |
| return 1; |
| } |
| |
| if (qup_init(id, qup_config)) { |
| printk(BIOS_ERR, "failed to initialize qup\n"); |
| return 1; |
| } |
| |
| if (qup_reset_i2c_master_status(id)) { |
| printk(BIOS_ERR, "failed to reset i2c master status\n"); |
| return 1; |
| } |
| |
| qup_config->initialized = 1; |
| return 0; |
| } |
| |
| int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments, |
| int seg_count) |
| { |
| struct i2c_msg *seg = segments; |
| int ret = 0; |
| |
| if (i2c_init(bus)) |
| return 1; |
| |
| while (!ret && seg_count--) { |
| if (seg->flags & I2C_M_RD) |
| ret = i2c_read(bus, seg->slave, seg->buf, seg->len); |
| else |
| ret = i2c_write(bus, seg->slave, seg->buf, seg->len, |
| (seg_count ? 0 : 1)); |
| seg++; |
| } |
| |
| if (ret) { |
| qup_set_state(bus, QUP_STATE_RESET); |
| return 1; |
| } |
| |
| return 0; |
| } |