a73b93157f
It encourages users from writing to the FSF without giving an address. Linux also prefers to drop that and their checkpatch.pl (that we imported) looks out for that. This is the result of util/scripts/no-fsf-addresses.sh with no further editing. Change-Id: Ie96faea295fe001911d77dbc51e9a6789558fbd6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/11888 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2015 Google, 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 <arch/io.h>
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#include <console/console.h>
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#include <device/i2c.h>
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#include <gpio.h>
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#include <soc/grf.h>
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#include <soc/i2c.h>
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#include <soc/pmu.h>
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static struct {
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gpio_t scl;
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gpio_t sda;
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} pins[] = {
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[0]{.scl = GPIO(0, C, 0), .sda = GPIO(0, B, 7)},
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[1]{.scl = GPIO(8, A, 5), .sda = GPIO(8, A, 4)},
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[2]{.scl = GPIO(6, B, 2), .sda = GPIO(6, B, 1)},
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[3]{.scl = GPIO(2, C, 0), .sda = GPIO(2, C, 1)},
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[4]{.scl = GPIO(7, C, 2), .sda = GPIO(7, C, 1)},
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[5]{.scl = GPIO(7, C, 4), .sda = GPIO(7, C, 3)},
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};
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static int get_scl(unsigned bus)
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{
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return gpio_get(pins[bus].scl);
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}
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static int get_sda(unsigned bus)
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{
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return gpio_get(pins[bus].sda);
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}
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static void set_scl(unsigned bus, int high)
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{
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if (high)
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gpio_input_pullup(pins[bus].scl);
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else
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gpio_output(pins[bus].scl, 0);
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}
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static void set_sda(unsigned bus, int high)
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{
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if (high)
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gpio_input_pullup(pins[bus].sda);
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else
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gpio_output(pins[bus].sda, 0);
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}
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static struct software_i2c_ops rk_ops = {
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.get_scl = get_scl,
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.get_sda = get_sda,
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.set_scl = set_scl,
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.set_sda = set_sda,
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};
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void software_i2c_attach(unsigned bus)
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{
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software_i2c[bus] = &rk_ops;
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/* Mux pins to GPIO function for software I2C emulation. */
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switch (bus) {
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case 0:
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clrbits_le32(&rk3288_pmu->iomux_i2c0scl, IOMUX_I2C0SCL);
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clrbits_le32(&rk3288_pmu->iomux_i2c0sda, IOMUX_I2C0SDA);
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break;
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case 1:
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write32(&rk3288_grf->iomux_i2c1, IOMUX_GPIO(IOMUX_I2C1));
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break;
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case 2:
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write32(&rk3288_grf->iomux_i2c2, IOMUX_GPIO(IOMUX_I2C2));
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break;
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case 3:
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write32(&rk3288_grf->iomux_i2c3, IOMUX_GPIO(IOMUX_I2C3));
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break;
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case 4:
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write32(&rk3288_grf->iomux_i2c4, IOMUX_GPIO(IOMUX_I2C4));
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break;
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case 5:
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write32(&rk3288_grf->iomux_i2c5scl, IOMUX_GPIO(IOMUX_I2C5SCL));
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write32(&rk3288_grf->iomux_i2c5sda, IOMUX_GPIO(IOMUX_I2C5SDA));
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break;
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default:
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die("Unknown I2C bus number!");
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}
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/* Initialize bus to idle state. */
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set_scl(bus, 1);
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set_sda(bus, 1);
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}
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void software_i2c_detach(unsigned bus)
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{
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software_i2c[bus] = NULL;
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/* Mux pins back to hardware I2C controller. */
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switch (bus) {
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case 0:
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setbits_le32(&rk3288_pmu->iomux_i2c0scl, IOMUX_I2C0SCL);
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setbits_le32(&rk3288_pmu->iomux_i2c0sda, IOMUX_I2C0SDA);
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break;
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case 1:
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write32(&rk3288_grf->iomux_i2c1, IOMUX_I2C1);
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break;
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case 2:
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write32(&rk3288_grf->iomux_i2c2, IOMUX_I2C2);
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break;
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case 3:
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write32(&rk3288_grf->iomux_i2c3, IOMUX_I2C3);
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break;
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case 4:
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write32(&rk3288_grf->iomux_i2c4, IOMUX_I2C4);
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break;
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case 5:
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write32(&rk3288_grf->iomux_i2c5scl, IOMUX_I2C5SCL);
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write32(&rk3288_grf->iomux_i2c5sda, IOMUX_I2C5SDA);
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break;
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default:
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die("Unknown I2C bus number!");
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}
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}
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