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>
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2016 Intel Corp.
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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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#define __SIMPLE_DEVICE__
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#include <assert.h>
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#include <arch/io.h>
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#include <console/console.h>
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#include <device/i2c_simple.h>
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#include <soc/pci_devs.h>
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#include <soc/reg_access.h>
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#include "reg_access.h"
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static uint64_t reg_read(struct reg_script_context *ctx)
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{
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int ret_code;
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const struct reg_script *step;
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uint8_t value = 0;
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step = ctx->step;
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switch (step->id) {
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default:
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printk(BIOS_ERR,
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"ERROR - Unknown register set (0x%08x)!\n",
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step->id);
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ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
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break;
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case GEN1_I2C_GPIO_EXP_0x20:
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case GEN1_I2C_GPIO_EXP_0x21:
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case GEN2_I2C_GPIO_EXP0:
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case GEN2_I2C_GPIO_EXP1:
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case GEN2_I2C_GPIO_EXP2:
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case GEN2_I2C_LED_PWM:
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if (ctx->display_features)
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printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
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ret_code = i2c_readb(0, step->id, (uint8_t)step->reg, &value);
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ASSERT(ret_code == 2);
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break;
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}
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return value;
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}
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static void reg_write(struct reg_script_context *ctx)
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{
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int ret_code;
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const struct reg_script *step;
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uint8_t value;
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step = ctx->step;
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switch (step->id) {
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default:
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printk(BIOS_ERR,
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"ERROR - Unknown register set (0x%08x)!\n",
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step->id);
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ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
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break;
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case GEN1_I2C_GPIO_EXP_0x20:
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case GEN1_I2C_GPIO_EXP_0x21:
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case GEN2_I2C_GPIO_EXP0:
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case GEN2_I2C_GPIO_EXP1:
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case GEN2_I2C_GPIO_EXP2:
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case GEN2_I2C_LED_PWM:
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case RMU_TEMP_REGS:
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if (ctx->display_features)
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printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
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value = (uint8_t)step->value;
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ret_code = i2c_writeb(0, step->id, (uint8_t)step->reg, value);
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ASSERT(ret_code == 2);
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break;
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}
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}
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const struct reg_script_bus_entry mainboard_reg_script_bus_table = {
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MAINBOARD_TYPE, reg_read, reg_write
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};
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REG_SCRIPT_BUS_ENTRY(mainboard_reg_script_bus_table);
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