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/*
* drivers/video/tegra/dc/mipi_cal.c
*
* Copyright (c) 2012-2013, NVIDIA CORPORATION, All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#include <linux/ioport.h>
#include <linux/gfp.h>
#include "dc_priv.h"
#include "mipi_cal.h"
#include "mipi_cal_regs.h"
#include "dsi.h"
int tegra_mipi_cal_init_hw(struct tegra_mipi_cal *mipi_cal)
{
unsigned cnt = MIPI_CAL_MIPI_CAL_CTRL_0;
BUG_ON(IS_ERR_OR_NULL(mipi_cal));
mutex_lock(&mipi_cal->lock);
tegra_mipi_cal_clk_enable(mipi_cal);
for (; cnt <= MIPI_CAL_MIPI_BIAS_PAD_CFG2_0; cnt += 4)
tegra_mipi_cal_write(mipi_cal, 0, cnt);
/* Clear MIPI cal status register */
tegra_mipi_cal_write(mipi_cal,
MIPI_AUTO_CAL_DONE_DSID(0x1) |
MIPI_AUTO_CAL_DONE_DSIC(0x1) |
MIPI_AUTO_CAL_DONE_DSIB(0x1) |
MIPI_AUTO_CAL_DONE_DSIA(0x1) |
MIPI_AUTO_CAL_DONE_CSIE(0x1) |
MIPI_AUTO_CAL_DONE_CSID(0x1) |
MIPI_AUTO_CAL_DONE_CSIC(0x1) |
MIPI_AUTO_CAL_DONE_CSIB(0x1) |
MIPI_AUTO_CAL_DONE_CSIA(0x1) |
MIPI_AUTO_CAL_DONE(0x1) |
MIPI_CAL_DRIV_DN_ADJ(0x0) |
MIPI_CAL_DRIV_UP_ADJ(0x0) |
MIPI_CAL_TERMADJ(0x0) |
MIPI_CAL_ACTIVE(0x0),
MIPI_CAL_CIL_MIPI_CAL_STATUS_0);
tegra_mipi_cal_clk_disable(mipi_cal);
mutex_unlock(&mipi_cal->lock);
return 0;
}
EXPORT_SYMBOL(tegra_mipi_cal_init_hw);
struct tegra_mipi_cal *tegra_mipi_cal_init_sw(struct tegra_dc *dc)
{
struct tegra_mipi_cal *mipi_cal;
struct resource *res;
struct clk *clk;
struct clk *fixed_clk;
void __iomem *base;
int err = 0;
mipi_cal = devm_kzalloc(&dc->ndev->dev, sizeof(*mipi_cal), GFP_KERNEL);
if (!mipi_cal) {
dev_err(&dc->ndev->dev, "mipi_cal: memory allocation fail\n");
err = -ENOMEM;
goto fail;
}
res = platform_get_resource_byname(dc->ndev,
IORESOURCE_MEM, "mipi_cal");
if (!res) {
dev_err(&dc->ndev->dev, "mipi_cal: no entry in resource\n");
err = -ENOENT;
goto fail_free_mipi_cal;
}
base = devm_request_and_ioremap(&dc->ndev->dev, res);
if (!base) {
dev_err(&dc->ndev->dev, "mipi_cal: bus to virtual mapping failed\n");
err = -EBUSY;
goto fail_free_res;
}
clk = clk_get_sys("mipi-cal", NULL);
if (IS_ERR_OR_NULL(clk)) {
dev_err(&dc->ndev->dev, "mipi_cal: clk get failed\n");
err = PTR_ERR(clk);
goto fail_free_map;
}
fixed_clk = clk_get_sys("mipi-cal-fixed", NULL);
if (IS_ERR_OR_NULL(fixed_clk)) {
dev_err(&dc->ndev->dev, "mipi_cal: fixed clk get failed\n");
err = PTR_ERR(fixed_clk);
goto fail_free_map;
}
mutex_init(&mipi_cal->lock);
mipi_cal->dc = dc;
mipi_cal->res = res;
mipi_cal->base = base;
mipi_cal->clk = clk;
mipi_cal->fixed_clk = fixed_clk;
return mipi_cal;
fail_free_map:
devm_iounmap(&dc->ndev->dev, base);
devm_release_mem_region(&dc->ndev->dev, res->start, resource_size(res));
fail_free_res:
release_resource(res);
fail_free_mipi_cal:
devm_kfree(&dc->ndev->dev, mipi_cal);
fail:
return ERR_PTR(err);
}
EXPORT_SYMBOL(tegra_mipi_cal_init_sw);
void tegra_mipi_cal_destroy(struct tegra_dc *dc)
{
struct tegra_mipi_cal *mipi_cal =
((struct tegra_dc_dsi_data *)
(tegra_dc_get_outdata(dc)))->mipi_cal;
BUG_ON(IS_ERR_OR_NULL(mipi_cal));
mutex_lock(&mipi_cal->lock);
clk_put(mipi_cal->clk);
devm_iounmap(&dc->ndev->dev, mipi_cal->base);
devm_release_mem_region(&dc->ndev->dev, mipi_cal->res->start,
resource_size(mipi_cal->res));
release_resource(mipi_cal->res);
mutex_unlock(&mipi_cal->lock);
mutex_destroy(&mipi_cal->lock);
devm_kfree(&dc->ndev->dev, mipi_cal);
}
EXPORT_SYMBOL(tegra_mipi_cal_destroy);
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