--- /dev/null
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <linux/clk.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioctl.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
+#include <linux/module.h>
+#include <linux/mxc_dcic.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <video/videomode.h>
+#include <video/of_videomode.h>
+
+#define DRIVER_NAME "mxc_dcic"
+
+#define DCIC_IPU1_DI0 "dcic-ipu1-di0"
+#define DCIC_IPU1_DI1 "dcic-ipu1-di1"
+#define DCIC_IPU2_DI0 "dcic-ipu2-di0"
+#define DCIC_IPU2_DI1 "dcic-ipu2-di1"
+#define DCIC_LCDIF "dcic-lcdif"
+#define DCIC_LCDIF1 "dcic-lcdif1"
+#define DCIC_LCDIF2 "dcic-lcdif2"
+#define DCIC_LVDS "dcic-lvds"
+#define DCIC_LVDS0 "dcic-lvds0"
+#define DCIC_LVDS1 "dcic-lvds1"
+#define DCIC_HDMI "dcic-hdmi"
+
+#define DCIC0_DEV_NAME "mxc_dcic0"
+#define DCIC1_DEV_NAME "mxc_dcic1"
+
+#define FB_SYNC_OE_LOW_ACT 0x80000000
+#define FB_SYNC_CLK_LAT_FALL 0x40000000
+
+static const struct dcic_mux imx6q_dcic0_mux[] = {
+ {
+ .dcic = DCIC_IPU1_DI0,
+ .val = IMX6Q_GPR10_DCIC1_MUX_CTL_IPU1_DI0,
+ }, {
+ .dcic = DCIC_LVDS0,
+ .val = IMX6Q_GPR10_DCIC1_MUX_CTL_LVDS0,
+ }, {
+ .dcic = DCIC_LVDS1,
+ .val = IMX6Q_GPR10_DCIC1_MUX_CTL_LVDS1,
+ }, {
+ .dcic = DCIC_HDMI,
+ .val = IMX6Q_GPR10_DCIC1_MUX_CTL_HDMI,
+ }
+};
+
+static const struct dcic_mux imx6q_dcic1_mux[] = {
+ {
+ .dcic = DCIC_IPU1_DI1,
+ .val = IMX6Q_GPR10_DCIC2_MUX_CTL_IPU1_DI1,
+ }, {
+ .dcic = DCIC_LVDS0,
+ .val = IMX6Q_GPR10_DCIC2_MUX_CTL_LVDS0,
+ }, {
+ .dcic = DCIC_LVDS1,
+ .val = IMX6Q_GPR10_DCIC2_MUX_CTL_LVDS1,
+ }, {
+ .dcic = DCIC_HDMI,
+ .val = IMX6Q_GPR10_DCIC2_MUX_CTL_MIPI,
+ }
+};
+
+static const struct bus_mux imx6q_dcic_buses[] = {
+ {
+ .name = DCIC0_DEV_NAME,
+ .reg = IOMUXC_GPR10,
+ .shift = 0,
+ .mask = IMX6Q_GPR10_DCIC1_MUX_CTL_MASK,
+ .dcic_mux_num = ARRAY_SIZE(imx6q_dcic0_mux),
+ .dcics = imx6q_dcic0_mux,
+ }, {
+ .name = DCIC1_DEV_NAME,
+ .reg = IOMUXC_GPR10,
+ .shift = 2,
+ .mask = IMX6Q_GPR10_DCIC2_MUX_CTL_MASK,
+ .dcic_mux_num = ARRAY_SIZE(imx6q_dcic1_mux),
+ .dcics = imx6q_dcic1_mux,
+ }
+};
+
+static const struct dcic_info imx6q_dcic_info = {
+ .bus_mux_num = ARRAY_SIZE(imx6q_dcic_buses),
+ .buses = imx6q_dcic_buses,
+};
+
+static const struct dcic_mux imx6sx_dcic0_mux[] = {
+ {
+ .dcic = DCIC_LCDIF1,
+ .val = IMX6SX_GPR5_DISP_MUX_DCIC1_LCDIF1,
+ }, {
+ .dcic = DCIC_LVDS,
+ .val = IMX6SX_GPR5_DISP_MUX_DCIC1_LVDS,
+ }
+};
+
+static const struct dcic_mux imx6sx_dcic1_mux[] = {
+ {
+ .dcic = DCIC_LCDIF2,
+ .val = IMX6SX_GPR5_DISP_MUX_DCIC2_LCDIF2,
+ }, {
+ .dcic = DCIC_LVDS,
+ .val = IMX6SX_GPR5_DISP_MUX_DCIC2_LVDS,
+ }
+};
+
+static const struct bus_mux imx6sx_dcic_buses[] = {
+ {
+ .name = DCIC0_DEV_NAME,
+ .reg = IOMUXC_GPR5,
+ .shift = 1,
+ .mask = IMX6SX_GPR5_DISP_MUX_DCIC1_MASK,
+ .dcic_mux_num = ARRAY_SIZE(imx6sx_dcic0_mux),
+ .dcics = imx6sx_dcic0_mux,
+ }, {
+ .name = DCIC1_DEV_NAME,
+ .reg = IOMUXC_GPR5,
+ .shift = 2,
+ .mask = IMX6SX_GPR5_DISP_MUX_DCIC2_MASK,
+ .dcic_mux_num = ARRAY_SIZE(imx6sx_dcic1_mux),
+ .dcics = imx6sx_dcic1_mux,
+ }
+};
+
+static const struct dcic_info imx6sx_dcic_info = {
+ .bus_mux_num = ARRAY_SIZE(imx6sx_dcic_buses),
+ .buses = imx6sx_dcic_buses,
+};
+
+static const struct of_device_id dcic_dt_ids[] = {
+ { .compatible = "fsl,imx6q-dcic", .data = &imx6q_dcic_info, },
+ { .compatible = "fsl,imx6sx-dcic", .data = &imx6sx_dcic_info, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dcic_dt_ids);
+
+static int of_get_dcic_val(struct device_node *np, struct dcic_data *dcic)
+{
+ const char *mux;
+ int ret;
+ u32 i, dcic_id;
+
+ ret = of_property_read_string(np, "dcic_mux", &mux);
+ if (ret < 0) {
+ dev_err(dcic->dev, "Can not get dcic_mux\n");
+ return ret;
+ }
+ ret = of_property_read_u32(np, "dcic_id", &dcic_id);
+ if (ret < 0) {
+ dev_err(dcic->dev, "Can not get dcic_id\n");
+ return ret;
+ }
+
+ dcic->bus_n = dcic_id;
+
+ for (i = 0; i < dcic->buses[dcic_id].dcic_mux_num; i++)
+ if (!strcmp(mux, dcic->buses[dcic_id].dcics[i].dcic)) {
+ dcic->mux_n = i;
+ return dcic->buses[dcic_id].dcics[i].val;
+ }
+
+ return -EINVAL;
+}
+
+static void dcic_enable(struct dcic_data *dcic)
+{
+ u32 val;
+
+ val = readl(&dcic->regs->dcicc);
+ val |= DCICC_IC_ENABLE;
+ writel(val, &dcic->regs->dcicc);
+}
+
+void dcic_disable(struct dcic_data *dcic)
+{
+ u32 val;
+
+ val = readl(&dcic->regs->dcicc);
+ val &= ~DCICC_IC_MASK;
+ val |= DCICC_IC_DISABLE;
+ writel(val, &dcic->regs->dcicc);
+}
+
+static void roi_enable(struct dcic_data *dcic, struct roi_params *roi_param)
+{
+ u32 val;
+ u32 roi_n = roi_param->roi_n;
+
+ val = readl(&dcic->regs->ROI[roi_n].dcicrc);
+ val |= DCICRC_ROI_ENABLE;
+ if (roi_param->freeze)
+ val |= DCICRC_ROI_FROZEN;
+ writel(val, &dcic->regs->ROI[roi_n].dcicrc);
+}
+
+static void roi_disable(struct dcic_data *dcic, u32 roi_n)
+{
+ u32 val;
+
+ val = readl(&dcic->regs->ROI[roi_n].dcicrc);
+ val &= ~DCICRC_ROI_ENABLE;
+ writel(val, &dcic->regs->ROI[roi_n].dcicrc);
+}
+
+static bool roi_configure(struct dcic_data *dcic, struct roi_params *roi_param)
+{
+ struct roi_regs *roi_reg;
+ u32 val;
+
+ if (roi_param->roi_n < 0 || roi_param->roi_n >= 16) {
+ printk(KERN_ERR "Error, Wrong ROI number %d\n", roi_param->roi_n);
+ return false;
+ }
+
+ if (roi_param->end_x <= roi_param->start_x ||
+ roi_param->end_y <= roi_param->start_y) {
+ printk(KERN_ERR "Error, Wrong ROI\n");
+ return false;
+ }
+
+ roi_reg = (struct roi_regs *) &dcic->regs->ROI[roi_param->roi_n];
+
+ /* init roi block size */
+ val = roi_param->start_y << 16 | roi_param->start_x;
+ writel(val, &roi_reg->dcicrc);
+
+ val = roi_param->end_y << 16 | roi_param->end_x;
+ writel(val, &roi_reg->dcicrs);
+
+ writel(roi_param->ref_sig, &roi_reg->dcicrrs);
+
+ roi_enable(dcic, roi_param);
+ return true;
+}
+
+static void dcic_int_enable(struct dcic_data *dcic)
+{
+ u32 val;
+
+ /* Clean pending interrupt before enable int */
+ writel(DCICS_FI_STAT_PENDING, &dcic->regs->dcics);
+ writel(0xffffffff, &dcic->regs->dcics);
+
+ /* Enable function interrupt */
+ val = readl(&dcic->regs->dcicic);
+ val &= ~DCICIC_FUN_INT_MASK;
+ val |= DCICIC_FUN_INT_ENABLE;
+ writel(val, &dcic->regs->dcicic);
+}
+
+static void dcic_int_disable(struct dcic_data *dcic)
+{
+ u32 val;
+
+ /* Disable both function and error interrupt */
+ val = readl(&dcic->regs->dcicic);
+ val = DCICIC_ERROR_INT_DISABLE | DCICIC_FUN_INT_DISABLE;
+ writel(val, &dcic->regs->dcicic);
+}
+
+static irqreturn_t dcic_irq_handler(int irq, void *data)
+{
+ u32 i;
+
+ struct dcic_data *dcic = data;
+ u32 dcics = readl(&dcic->regs->dcics);
+
+ dcic->result = dcics & 0xffff;
+
+ dcic_int_disable(dcic);
+
+ /* clean dcic interrupt state */
+ writel(DCICS_FI_STAT_PENDING, &dcic->regs->dcics);
+ writel(dcics, &dcic->regs->dcics);
+
+ for (i = 0; i < 16; i++) {
+ printk(KERN_INFO "ROI=%d,crcRS=0x%x, crcCS=0x%x\n", i,
+ readl(&dcic->regs->ROI[i].dcicrrs),
+ readl(&dcic->regs->ROI[i].dcicrcs));
+ }
+ complete(&dcic->roi_crc_comp);
+
+ return 0;
+}
+
+static int dcic_configure(struct dcic_data *dcic, unsigned int sync)
+{
+ u32 val;
+ val = 0;
+
+ /* vsync, hsync, DE, clk_pol */
+ if (!(sync & FB_SYNC_HOR_HIGH_ACT))
+ val |= DCICC_HSYNC_POL_ACTIVE_LOW;
+ if (!(sync & FB_SYNC_VERT_HIGH_ACT))
+ val |= DCICC_VSYNC_POL_ACTIVE_LOW;
+ if (sync & FB_SYNC_OE_LOW_ACT)
+ val |= DCICC_DE_ACTIVE_LOW;
+ if (sync & FB_SYNC_CLK_LAT_FALL)
+ val |= DCICC_CLK_POL_INVERTED;
+
+ writel(val, &dcic->regs->dcicc);
+ return 0;
+}
+
+static int dcic_open(struct inode *inode, struct file *file)
+{
+ struct dcic_data *dcic;
+
+ dcic = container_of(inode->i_cdev, struct dcic_data, cdev);
+
+ mutex_lock(&dcic->lock);
+
+ clk_prepare_enable(dcic->disp_axi_clk);
+ clk_prepare_enable(dcic->dcic_clk);
+
+ file->private_data = dcic;
+ mutex_unlock(&dcic->lock);
+ return 0;
+}
+
+static int dcic_release(struct inode *inode, struct file *file)
+{
+ struct dcic_data *dcic = file->private_data;
+ u32 i;
+
+ mutex_lock(&dcic->lock);
+
+ for (i = 0; i < 16; i++)
+ roi_disable(dcic, i);
+
+ clk_disable_unprepare(dcic->dcic_clk);
+ clk_disable_unprepare(dcic->disp_axi_clk);
+
+ mutex_unlock(&dcic->lock);
+ return 0;
+}
+
+static int dcic_init(struct device_node *np, struct dcic_data *dcic)
+{
+ u32 val, bus;
+
+ val = of_get_dcic_val(np, dcic);
+ if (val < 0) {
+ printk(KERN_ERR "Error incorrect\n");
+ return -1;
+ }
+
+ bus = dcic->bus_n;
+
+ regmap_update_bits(dcic->regmap, dcic->buses[bus].reg ,
+ dcic->buses[bus].mask, val);
+
+ return 0;
+}
+
+static long dcic_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int __user *argp = (void __user *)arg;
+ struct dcic_data *dcic = file->private_data;
+ struct roi_params roi_param;
+ unsigned int sync;
+ int ret = 0;
+
+ switch (cmd) {
+ case DCIC_IOC_CONFIG_DCIC:
+ if (!copy_from_user(&sync, argp, sizeof(unsigned int)))
+ dcic_configure(dcic, sync);
+ break;
+ case DCIC_IOC_CONFIG_ROI:
+ if (copy_from_user(&roi_param, argp, sizeof(roi_param)))
+ return -EFAULT;
+ else
+ if (!roi_configure(dcic, &roi_param))
+ return -EINVAL;
+ break;
+ case DCIC_IOC_GET_RESULT:
+ init_completion(&dcic->roi_crc_comp);
+
+ dcic_enable(dcic);
+
+ dcic->result = 0;
+ msleep(25);
+
+ dcic_int_enable(dcic);
+
+ ret = wait_for_completion_interruptible_timeout(
+ &dcic->roi_crc_comp, 1 * HZ);
+ if (ret == 0) {
+ dev_err(dcic->dev,
+ "dcic wait for roi crc cal timeout\n");
+ ret = -ETIME;
+ } else if (ret > 0) {
+ if (copy_to_user(argp, &dcic->result, sizeof(dcic->result)))
+ return -EFAULT;
+ ret = 0;
+ }
+ dcic_disable(dcic);
+ break;
+ default:
+ printk(KERN_ERR "%s, Unsupport cmd %d\n", __func__, cmd);
+ break;
+ }
+ return ret;
+}
+
+
+static const struct file_operations mxc_dcic_fops = {
+ .owner = THIS_MODULE,
+ .open = dcic_open,
+ .release = dcic_release,
+ .unlocked_ioctl = dcic_ioctl,
+};
+
+static int dcic_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *of_id =
+ of_match_device(dcic_dt_ids, dev);
+ const struct dcic_info *dcic_info =
+ (const struct dcic_info *)of_id->data;
+ struct device_node *np = dev->of_node;
+ struct dcic_data *dcic;
+ struct resource *res;
+ const char *name;
+ dev_t devt;
+ int ret = 0;
+ int irq;
+
+ dcic = devm_kzalloc(&pdev->dev,
+ sizeof(struct dcic_data),
+ GFP_KERNEL);
+ if (!dcic) {
+ dev_err(&pdev->dev, "Cannot allocate device data\n");
+ ret = -ENOMEM;
+ goto ealloc;
+ }
+
+ platform_set_drvdata(pdev, dcic);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "No dcic base address found.\n");
+ ret = -ENODEV;
+ goto ealloc;
+ }
+
+ dcic->regs = (struct dcic_regs *) devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!dcic->regs) {
+ dev_err(&pdev->dev, "ioremap failed with dcic base\n");
+ ret = -ENOMEM;
+ goto ealloc;
+ }
+
+ dcic->dev = dev;
+ dcic->buses = dcic_info->buses;
+
+ dcic->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
+ if (IS_ERR(dcic->regmap)) {
+ dev_err(dev, "failed to get parent regmap\n");
+ ret = PTR_ERR(dcic->regmap);
+ goto ealloc;
+ }
+
+ /* clock */
+ dcic->disp_axi_clk = devm_clk_get(&pdev->dev, "disp-axi");
+ if (IS_ERR(dcic->disp_axi_clk)) {
+ dev_err(&pdev->dev, "get disp-axi clock failed\n");
+ ret = PTR_ERR(dcic->disp_axi_clk);
+ goto ealloc;
+ }
+
+ dcic->dcic_clk = devm_clk_get(&pdev->dev, "dcic");
+ if (IS_ERR(dcic->dcic_clk)) {
+ dev_err(&pdev->dev, "get dcic clk failed\n");
+ ret = PTR_ERR(dcic->dcic_clk);
+ goto ealloc;
+ }
+
+ mutex_init(&dcic->lock);
+ ret = dcic_init(np, dcic);
+ if (ret < 0) {
+ printk(KERN_ERR "Failed init dcic\n");
+ goto ealloc;
+ }
+
+ /* register device */
+ name = dcic->buses[dcic->bus_n].name;
+ dcic->major = register_chrdev(0, name, &mxc_dcic_fops);
+ if (dcic->major < 0) {
+ printk(KERN_ERR "DCIC: unable to get a major for dcic\n");
+ ret = -EBUSY;
+ goto ealloc;
+ }
+
+ dcic->class = class_create(THIS_MODULE, name);
+ if (IS_ERR(dcic->class)) {
+ ret = PTR_ERR(dcic->class);
+ goto err_out_chrdev;
+ }
+
+ /* create char device */
+ devt = MKDEV(dcic->major, 0);
+ dcic->devt = devt;
+
+ cdev_init(&dcic->cdev, &mxc_dcic_fops);
+ dcic->cdev.owner = THIS_MODULE;
+ ret = cdev_add(&dcic->cdev, devt, 1);
+ if (ret)
+ goto err_out_class;
+
+ device_create(dcic->class, NULL, devt,
+ NULL, name);
+
+ /* IRQ */
+ irq = platform_get_irq(pdev, 0);
+
+ ret = devm_request_irq(&pdev->dev, irq, dcic_irq_handler, 0,
+ dev_name(&pdev->dev), dcic);
+ if (ret) {
+ dev_err(&pdev->dev, "request_irq (%d) failed with error %d\n",
+ irq, ret);
+ goto err_out_cdev;
+ }
+
+ return 0;
+
+err_out_cdev:
+ cdev_del(&dcic->cdev);
+err_out_class:
+ device_destroy(dcic->class, devt);
+ class_destroy(dcic->class);
+err_out_chrdev:
+ unregister_chrdev(dcic->major, name);
+ealloc:
+ return ret;
+}
+
+static int dcic_remove(struct platform_device *pdev)
+{
+ struct dcic_data *dcic = platform_get_drvdata(pdev);
+ const char *name;
+
+ name = dcic->buses[dcic->bus_n].name;
+
+ device_destroy(dcic->class, dcic->devt);
+ cdev_del(&dcic->cdev);
+ class_destroy(dcic->class);
+ unregister_chrdev(dcic->major, name);
+ mutex_destroy(&dcic->lock);
+
+ return 0;
+}
+
+static struct platform_driver dcic_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = dcic_dt_ids,
+ },
+ .probe = dcic_probe,
+ .remove = dcic_remove,
+};
+
+module_platform_driver(dcic_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXC DCIC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
projects / linux.git / commitdiff