ENGR00161382-3 MX6Q MIPI CSI2: Add MIPI CSI2 driver

Add MIPI CSI2 driver

Signed-off-by: Even Xu <b21019@freescale.com>

6 files changed, 429 insertions, 0 deletions

diff --git a/drivers/mxc/Kconfig b/drivers/mxc/Kconfig
index ac7f92d7e66..441b655da15 100644
--- a/drivers/mxc/Kconfig
+++ b/drivers/mxc/Kconfig
@@ -37,6 +37,7 @@ source "drivers/mxc/adc/Kconfig"
 source "drivers/mxc/amd-gpu/Kconfig"
 source "drivers/mxc/gpu-viv/Kconfig"
 source "drivers/mxc/thermal/Kconfig"
+source "drivers/mxc/mipi/Kconfig"
 
 endmenu
 
diff --git a/drivers/mxc/Makefile b/drivers/mxc/Makefile
index b70d4b7af2d..fbcd0fee180 100644
--- a/drivers/mxc/Makefile
+++ b/drivers/mxc/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_IMX_ADC)                   += adc/
 obj-$(CONFIG_MXC_AMD_GPU)              += amd-gpu/
 obj-$(CONFIG_MXC_GPU_VIV)              += gpu-viv/
 obj-$(CONFIG_ANATOP_THERMAL)            += thermal/
+obj-$(CONFIG_MXC_MIPI_CSI2)            += mipi/
diff --git a/drivers/mxc/mipi/Kconfig b/drivers/mxc/mipi/Kconfig
new file mode 100644
index 00000000000..2ff0f0b47fc
--- /dev/null
+++ b/drivers/mxc/mipi/Kconfig
@@ -0,0 +1,13 @@
+#
+# MIPI configuration
+#
+
+menu "MXC MIPI Support"
+
+config MXC_MIPI_CSI2
+	tristate "MIPI CSI2 support"
+	depends on ARCH_MX6
+	---help---
+         Say Y to get the MIPI CSI2 support.
+
+endmenu
diff --git a/drivers/mxc/mipi/Makefile b/drivers/mxc/mipi/Makefile
new file mode 100644
index 00000000000..98cda773bd2
--- /dev/null
+++ b/drivers/mxc/mipi/Makefile
@@ -0,0 +1,4 @@
+#
+# Makefile for the mipi interface driver
+#
+obj-$(CONFIG_MXC_MIPI_CSI2) += mxc_mipi_csi2.o
diff --git a/drivers/mxc/mipi/mxc_mipi_csi2.c b/drivers/mxc/mipi/mxc_mipi_csi2.c
new file mode 100644
index 00000000000..89592a84745
--- /dev/null
+++ b/drivers/mxc/mipi/mxc_mipi_csi2.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/console.h>
+#include <linux/io.h>
+#include <linux/bitops.h>
+#include <linux/ipu.h>
+#include <linux/mxcfb.h>
+#include <linux/regulator/consumer.h>
+#include <linux/backlight.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/fsl_devices.h>
+
+#include <mach/hardware.h>
+#include <mach/clock.h>
+#include <mach/mipi_csi2.h>
+
+#include "mxc_mipi_csi2.h"
+
+static struct mipi_csi2_info *gmipi_csi2;
+
+static inline void mipi_csi2_write(struct mipi_csi2_info *info, unsigned value, unsigned offset)
+{
+	writel(value, info->mipi_csi2_base + offset);
+}
+
+static inline unsigned int mipi_csi2_read(struct mipi_csi2_info *info, unsigned offset)
+{
+	return readl(info->mipi_csi2_base + offset);
+}
+
+/*!
+ * This function is called to set mipi lanes.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns setted value
+ */
+unsigned int mipi_csi2_set_lanes(struct mipi_csi2_info *info)
+{
+	mipi_csi2_write(info, info->lanes - 1, CSI2_N_LANES);
+
+	return mipi_csi2_read(info, CSI2_N_LANES);
+}
+EXPORT_SYMBOL(mipi_csi2_set_lanes);
+
+/*!
+ * This function is called to set mipi data type.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns setted value
+ */
+unsigned int mipi_csi2_set_datatype(struct mipi_csi2_info *info,
+										unsigned int datatype)
+{
+	info->datatype = datatype;
+
+	return info->datatype;
+}
+EXPORT_SYMBOL(mipi_csi2_set_datatype);
+
+/*!
+ * This function is called to get mipi data type.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns mipi data type
+ */
+unsigned int mipi_csi2_get_datatype(struct mipi_csi2_info *info)
+{
+	return info->datatype;
+}
+EXPORT_SYMBOL(mipi_csi2_get_datatype);
+
+/*!
+ * This function is called to get mipi csi2 dphy status.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns dphy status
+ */
+unsigned int mipi_csi2_dphy_status(struct mipi_csi2_info *info)
+{
+	return mipi_csi2_read(info, CSI2_PHY_STATE);
+}
+EXPORT_SYMBOL(mipi_csi2_dphy_status);
+
+/*!
+ * This function is called to get mipi csi2 error1 status.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns error1 value
+ */
+unsigned int mipi_csi2_get_error1(struct mipi_csi2_info *info)
+{
+	return mipi_csi2_read(info, CSI2_ERR1);
+}
+EXPORT_SYMBOL(mipi_csi2_get_error1);
+
+/*!
+ * This function is called to get mipi csi2 error1 status.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns error1 value
+ */
+unsigned int mipi_csi2_get_error2(struct mipi_csi2_info *info)
+{
+	return mipi_csi2_read(info, CSI2_ERR2);
+}
+EXPORT_SYMBOL(mipi_csi2_get_error2);
+
+/*!
+ * This function is called to enable mipi to ipu pixel clock.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns 0 on success or negative error code on fail
+ */
+int mipi_csi2_pixelclk_enable(struct mipi_csi2_info *info)
+{
+	return clk_enable(info->pixel_clk);
+}
+EXPORT_SYMBOL(mipi_csi2_pixelclk_enable);
+
+/*!
+ * This function is called to disable mipi to ipu pixel clock.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns 0 on success or negative error code on fail
+ */
+void mipi_csi2_pixelclk_disable(struct mipi_csi2_info *info)
+{
+	clk_disable(info->pixel_clk);
+}
+EXPORT_SYMBOL(mipi_csi2_pixelclk_disable);
+
+/*!
+ * This function is called to power on mipi csi2.
+ *
+ * @param	info		mipi csi2 hander
+ * @return      Returns 0 on success or negative error code on fail
+ */
+int mipi_csi2_reset(struct mipi_csi2_info *info)
+{
+	mipi_csi2_write(info, 0x0, CSI2_PHY_SHUTDOWNZ);
+	mipi_csi2_write(info, 0x0, CSI2_DPHY_RSTZ);
+	mipi_csi2_write(info, 0x0, CSI2_RESETN);
+
+	mipi_csi2_write(info, 0x00000001, CSI2_PHY_TST_CTRL0);
+	mipi_csi2_write(info, 0x00000000, CSI2_PHY_TST_CTRL1);
+	mipi_csi2_write(info, 0x00000000, CSI2_PHY_TST_CTRL0);
+	mipi_csi2_write(info, 0x00000002, CSI2_PHY_TST_CTRL0);
+	mipi_csi2_write(info, 0x00010044, CSI2_PHY_TST_CTRL1);
+	mipi_csi2_write(info, 0x00000000, CSI2_PHY_TST_CTRL0);
+	mipi_csi2_write(info, 0x00000014, CSI2_PHY_TST_CTRL1);
+	mipi_csi2_write(info, 0x00000002, CSI2_PHY_TST_CTRL0);
+	mipi_csi2_write(info, 0x00000000, CSI2_PHY_TST_CTRL0);
+
+	mipi_csi2_write(info, 0xffffffff, CSI2_PHY_SHUTDOWNZ);
+	mipi_csi2_write(info, 0xffffffff, CSI2_DPHY_RSTZ);
+	mipi_csi2_write(info, 0xffffffff, CSI2_RESETN);
+
+	return 0;
+}
+EXPORT_SYMBOL(mipi_csi2_reset);
+
+/*!
+ * This function is called to get mipi csi2 info.
+ *
+ * @return      Returns mipi csi2 info struct pointor
+ */
+struct mipi_csi2_info *mipi_csi2_get_info(void)
+{
+	return gmipi_csi2;
+}
+EXPORT_SYMBOL(mipi_csi2_get_info);
+
+/*!
+ * This function is called to get mipi csi2 bind ipu num.
+ *
+ * @return      Returns mipi csi2 bind ipu num
+ */
+int mipi_csi2_get_bind_ipu(struct mipi_csi2_info *info)
+{
+	return info->ipu_id;
+}
+EXPORT_SYMBOL(mipi_csi2_get_bind_ipu);
+
+/*!
+ * This function is called to get mipi csi2 bind csi num.
+ *
+ * @return      Returns mipi csi2 bind csi num
+ */
+unsigned int mipi_csi2_get_bind_csi(struct mipi_csi2_info *info)
+{
+	return info->csi_id;
+}
+EXPORT_SYMBOL(mipi_csi2_get_bind_csi);
+
+/*!
+ * This function is called to get mipi csi2 virtual channel.
+ *
+ * @return      Returns mipi csi2 virtual channel num
+ */
+unsigned int mipi_csi2_get_virtual_channel(struct mipi_csi2_info *info)
+{
+	return info->v_channel;
+}
+EXPORT_SYMBOL(mipi_csi2_get_virtual_channel);
+
+/**
+ * This function is called by the driver framework to initialize the MIPI CSI2
+ * device.
+ *
+ * @param	pdev	The device structure for the MIPI CSI2 passed in by the
+ *			driver framework.
+ *
+ * @return      Returns 0 on success or negative error code on error
+ */
+static int mipi_csi2_probe(struct platform_device *pdev)
+{
+	struct mipi_csi2_platform_data *plat_data = pdev->dev.platform_data;
+	struct resource *res;
+	u32 mipi_csi2_dphy_ver;
+	int ret;
+
+	if ((plat_data->ipu_id < 0) || (plat_data->ipu_id > 1) ||
+		(plat_data->csi_id > 1) || (plat_data->v_channel > 3) ||
+		(plat_data->lanes > 4)) {
+		dev_err(&pdev->dev, "invalid param for mimp csi2!\n");
+		return -EINVAL;
+	}
+
+	gmipi_csi2 = kmalloc(sizeof(struct mipi_csi2_info), GFP_KERNEL);
+	if (!gmipi_csi2) {
+		ret = -ENOMEM;
+		goto alloc_failed;
+	}
+
+	/* get mipi csi2 informaiton */
+	gmipi_csi2->pdev = pdev;
+	gmipi_csi2->ipu_id = plat_data->ipu_id;
+	gmipi_csi2->csi_id = plat_data->csi_id;
+	gmipi_csi2->v_channel = plat_data->v_channel;
+	gmipi_csi2->lanes = plat_data->lanes;
+
+	/* get mipi dphy clk */
+	gmipi_csi2->dphy_clk = clk_get(&pdev->dev, plat_data->dphy_clk);
+	if (IS_ERR(gmipi_csi2->dphy_clk)) {
+		dev_err(&pdev->dev, "failed to get dphy pll_ref_clk\n");
+		ret = PTR_ERR(gmipi_csi2->dphy_clk);
+		goto err_clk1;
+	}
+
+	/* get mipi to ipu pixel clk */
+	gmipi_csi2->pixel_clk = clk_get(&pdev->dev, plat_data->pixel_clk);
+	if (IS_ERR(gmipi_csi2->pixel_clk)) {
+		dev_err(&pdev->dev, "failed to get mipi pixel clk\n");
+		ret = PTR_ERR(gmipi_csi2->pixel_clk);
+		goto err_clk2;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		ret = -ENODEV;
+		goto failed_get_res;
+	}
+
+	/* mipi register mapping */
+	gmipi_csi2->mipi_csi2_base = ioremap(res->start, PAGE_SIZE);
+	if (!gmipi_csi2->mipi_csi2_base) {
+		ret = -ENOMEM;
+		goto failed_ioremap;
+	}
+
+	/* mipi dphy clk enable for register access */
+	clk_enable(gmipi_csi2->dphy_clk);
+	/* get mipi csi2 dphy version */
+	mipi_csi2_dphy_ver = mipi_csi2_read(gmipi_csi2, CSI2_VERSION);
+
+	platform_set_drvdata(pdev, gmipi_csi2);
+
+	dev_info(&pdev->dev, "i.MX MIPI CSI2 driver probed\n");
+	dev_info(&pdev->dev, "i.MX MIPI CSI2 dphy version is 0x%x\n",
+						mipi_csi2_dphy_ver);
+
+	return 0;
+
+failed_ioremap:
+failed_get_res:
+	clk_put(gmipi_csi2->pixel_clk);
+err_clk2:
+	clk_put(gmipi_csi2->dphy_clk);
+err_clk1:
+	kfree(gmipi_csi2);
+alloc_failed:
+	return ret;
+}
+
+static int __devexit mipi_csi2_remove(struct platform_device *pdev)
+{
+	/* unmapping mipi register */
+	iounmap(gmipi_csi2->mipi_csi2_base);
+
+	/* disable mipi dphy clk */
+	clk_disable(gmipi_csi2->dphy_clk);
+	clk_put(gmipi_csi2->dphy_clk);
+
+	clk_put(gmipi_csi2->pixel_clk);
+
+	kfree(gmipi_csi2);
+
+	dev_set_drvdata(&pdev->dev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver mipi_csi2_driver = {
+	.driver = {
+		   .name = "mxc_mipi_csi2",
+	},
+	.probe = mipi_csi2_probe,
+	.remove = __devexit_p(mipi_csi2_remove),
+};
+
+static int __init mipi_csi2_init(void)
+{
+	int err;
+
+	err = platform_driver_register(&mipi_csi2_driver);
+	if (err) {
+		pr_err("mipi_csi2_driver register failed\n");
+		return -ENODEV;
+	}
+
+	pr_info("MIPI CSI2 driver module loaded\n");
+
+	return 0;
+}
+
+static void __exit mipi_csi2_cleanup(void)
+{
+	platform_driver_unregister(&mipi_csi2_driver);
+}
+
+module_init(mipi_csi2_init);
+module_exit(mipi_csi2_cleanup);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("i.MX MIPI CSI2 driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mxc/mipi/mxc_mipi_csi2.h b/drivers/mxc/mipi/mxc_mipi_csi2.h
new file mode 100644
index 00000000000..d7c4ba1e36d
--- /dev/null
+++ b/drivers/mxc/mipi/mxc_mipi_csi2.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __MXC_MIPI_CSI2_H__
+#define __MXC_MIPI_CSI2_H__
+
+#ifdef DEBUG
+#define mipi_dbg(fmt, ...)	\
+	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#else
+#define mipi_dbg(fmt, ...)
+#endif
+
+/* driver private data */
+struct mipi_csi2_info {
+	int				ipu_id;
+	unsigned int	csi_id;
+	unsigned int	v_channel;
+	unsigned int	lanes;
+	unsigned int	datatype;
+	struct clk			*dphy_clk;
+	struct clk			*pixel_clk;
+	unsigned int		*mipi_csi2_base;
+	struct platform_device		*pdev;
+};
+
+#endif