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/*
* This file is part of the coreboot project.
*
* Copyright 2014 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <lib.h>
#include <stdlib.h>
#include <delay.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <device/device.h>
#include <soc/nvidia/tegra/types.h>
#include <soc/display.h>
#include <soc/mipi_dsi.h>
#include <soc/tegra_dsi.h>
#include "jdi_25x18_display/panel-jdi-lpm102a188a.h"
static unsigned long dsi_pads[] = {
0x060, /* DSIA & DSIB pads */
0x180, /* DSIC & DSID pads */
};
static struct tegra_mipi mipi_data = {
.regs = (void *)TEGRA_MIPI_CAL_BASE,
};
static inline unsigned long tegra_mipi_readl(struct tegra_mipi *mipi,
unsigned long reg)
{
return readl(mipi->regs + (reg << 2));
}
static inline void tegra_mipi_writel(struct tegra_mipi *mipi,
unsigned long value, unsigned long reg)
{
writel(value, mipi->regs + (reg << 2));
}
static const struct calibration_regs tegra124_mipi_calibration_regs[] = {
{ .data = MIPI_CAL_CONFIG_CSIA, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
{ .data = MIPI_CAL_CONFIG_CSIB, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
{ .data = MIPI_CAL_CONFIG_CSIC, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
{ .data = MIPI_CAL_CONFIG_CSID, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
{ .data = MIPI_CAL_CONFIG_CSIE, .clk = MIPI_CAL_CONFIG_CSIE_CLK },
{ .data = MIPI_CAL_CONFIG_DSIA, .clk = MIPI_CAL_CONFIG_DSIAB_CLK },
{ .data = MIPI_CAL_CONFIG_DSIB, .clk = MIPI_CAL_CONFIG_DSIAB_CLK },
};
static const struct tegra_mipi_config tegra124_mipi_config = {
.calibrate_clk_lane = 1,
.regs = tegra124_mipi_calibration_regs,
.num_pads = ARRAY_SIZE(tegra124_mipi_calibration_regs),
};
struct tegra_mipi_device *tegra_mipi_request(struct tegra_mipi_device *device,
int device_index)
{
device->mipi = &mipi_data;
device->config = &tegra124_mipi_config;
device->pads = dsi_pads[device_index];
return device;
}
static int tegra_mipi_wait(struct tegra_mipi *mipi)
{
u32 poll_interval_us = 1000;
u32 timeout_us = 250 * 1000;
unsigned long value;
do {
value = tegra_mipi_readl(mipi, MIPI_CAL_STATUS);
if ((value & MIPI_CAL_STATUS_ACTIVE) == 0 &&
(value & MIPI_CAL_STATUS_DONE) != 0)
return 0;
if (timeout_us > poll_interval_us)
timeout_us -= poll_interval_us;
else
break;
udelay(poll_interval_us);
} while (1);
printk(BIOS_ERR, "%s: ERROR: timeout\n", __func__);
return -ETIMEDOUT;
}
int tegra_mipi_calibrate(struct tegra_mipi_device *device)
{
const struct tegra_mipi_config *cfg = device->config;
unsigned long value, clk_value;
unsigned int i;
int err;
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG0);
value &= ~MIPI_CAL_BIAS_PAD_PDVCLAMP;
value |= MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG0);
tegra_mipi_writel(device->mipi, MIPI_CAL_BIAS_PAD_CFG1_DEFAULT,
MIPI_CAL_BIAS_PAD_CFG1);
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
value &= ~MIPI_CAL_BIAS_PAD_PDVREG;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
for (i = 0; i < cfg->num_pads; i++) {
if (device->pads & BIT(i)) {
value = MIPI_CAL_CONFIG_SELECT |
MIPI_CAL_CONFIG_HSPDOS(0) |
MIPI_CAL_CONFIG_HSPUOS(4) |
MIPI_CAL_CONFIG_TERMOS(5);
clk_value = MIPI_CAL_CONFIG_SELECT |
MIPI_CAL_CONFIG_HSCLKPDOSD(0) |
MIPI_CAL_CONFIG_HSCLKPUOSD(4);
} else {
value = 0;
clk_value = 0;
}
tegra_mipi_writel(device->mipi, value, cfg->regs[i].data);
if (cfg->calibrate_clk_lane)
tegra_mipi_writel(device->mipi, clk_value,
cfg->regs[i].clk);
}
value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
value |= MIPI_CAL_CTRL_START;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
err = tegra_mipi_wait(device->mipi);
return err;
}
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