Re: [RFC v2 02/10] exynos5-fimc-is: Adds fimc-is driver core files

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 05/31/2013 03:03 PM, Arun Kumar K wrote:
This driver is for the FIMC-IS IP available in Samsung Exynos5
SoC onwards. This patch adds the core files for the new driver.

Signed-off-by: Arun Kumar K<arun.kk@xxxxxxxxxxx>
Signed-off-by: Kilyeon Im<kilyeon.im@xxxxxxxxxxx>
---
  drivers/media/platform/exynos5-is/fimc-is-core.c |  304 ++++++++++++++++++++++
  drivers/media/platform/exynos5-is/fimc-is-core.h |  126 +++++++++
  2 files changed, 430 insertions(+)
  create mode 100644 drivers/media/platform/exynos5-is/fimc-is-core.c
  create mode 100644 drivers/media/platform/exynos5-is/fimc-is-core.h

diff --git a/drivers/media/platform/exynos5-is/fimc-is-core.c b/drivers/media/platform/exynos5-is/fimc-is-core.c
new file mode 100644
index 0000000..d24b634
--- /dev/null
+++ b/drivers/media/platform/exynos5-is/fimc-is-core.c
@@ -0,0 +1,304 @@
+/*
+ * Samsung EXYNOS5 FIMC-IS (Imaging Subsystem) driver
+*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Arun Kumar K<arun.kk@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include<linux/bug.h>
+#include<linux/ctype.h>
+#include<linux/device.h>
+#include<linux/debugfs.h>
+#include<linux/delay.h>
+#include<linux/errno.h>
+#include<linux/firmware.h>
+#include<linux/fs.h>
+#include<linux/gpio.h>
+#include<linux/interrupt.h>
+#include<linux/kernel.h>
+#include<linux/list.h>
+#include<linux/module.h>
+#include<linux/types.h>
+#include<linux/platform_device.h>
+#include<linux/pm_runtime.h>
+#include<linux/slab.h>
+#include<linux/videodev2.h>
+#include<linux/of.h>
+#include<linux/of_gpio.h>
+#include<linux/of_address.h>
+#include<linux/of_platform.h>
+#include<linux/of_irq.h>
+#include<linux/pinctrl/consumer.h>
+
+#include<media/v4l2-device.h>
+#include<media/v4l2-ioctl.h>
+#include<media/v4l2-mem2mem.h>
+#include<media/v4l2-of.h>
+#include<media/videobuf2-core.h>
+#include<media/videobuf2-dma-contig.h>
+
+#include "fimc-is.h"
+
+static char *fimc_is_clock_name[] = {
+	[IS_CLK_ISP]		= "isp",
+	[IS_CLK_MCU_ISP]	= "mcu_isp",
+	[IS_CLK_ISP_DIV0]	= "isp_div0",
+	[IS_CLK_ISP_DIV1]	= "isp_div1",
+	[IS_CLK_ISP_DIVMPWM]	= "isp_divmpwm",
+	[IS_CLK_MCU_ISP_DIV0]	= "mcu_isp_div0",
+	[IS_CLK_MCU_ISP_DIV1]	= "mcu_isp_div1",
+};
+
+static void fimc_is_clk_put(struct fimc_is *is)

nit: fimc_is_put_clocks() would be probably a better name for this function.

+{
+	int i;
+
+	for (i = 0; i<  IS_CLK_MAX_NUM; i++) {
+		if (IS_ERR_OR_NULL(is->clock[i]))
+			continue;
+		clk_unprepare(is->clock[i]);
+		clk_put(is->clock[i]);
+		is->clock[i] = NULL;
+	}
+}
+
+static int fimc_is_clk_get(struct fimc_is *is)

nit: fimc_is_get_clocks() ?

+{
+	struct device *dev =&is->pdev->dev;
+	int i, ret;
+
+	for (i = 0; i<  IS_CLK_MAX_NUM; i++) {
+		is->clock[i] = clk_get(dev, fimc_is_clock_name[i]);
+		if (IS_ERR(is->clock[i]))
+			goto err;
+		ret = clk_prepare(is->clock[i]);
+		if (ret<  0) {
+			clk_put(is->clock[i]);
+			is->clock[i] = NULL;
+			goto err;
+		}
+	}
+	return 0;
+err:
+	fimc_is_clk_put(is);
+	pr_err("Failed to get clock: %s\n", fimc_is_clock_name[i]);
+	return -ENXIO;
+}
+
+static int fimc_is_clk_cfg(struct fimc_is *is)

nit: fimc_is_configure_clocks() ?

+{
+	int ret;
+
+	ret = fimc_is_clk_get(is);
+	if (ret)
+		return ret;
+
+	/* Set rates */
+	ret = clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV0], 200 * 1000000);
+	ret |= clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV1], 100 * 1000000);
+	ret |= clk_set_rate(is->clock[IS_CLK_ISP_DIV0], 134 * 1000000);
+	ret |= clk_set_rate(is->clock[IS_CLK_ISP_DIV1], 68 * 1000000);
+	ret |= clk_set_rate(is->clock[IS_CLK_ISP_DIVMPWM], 34 * 1000000);

Please do not obfuscate return value like this.

	ret = clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV0], 200 * 1000000);
	if (ret)
		ret = clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV1], 100 * 1000000);
	...

And how about adding macro definitions for the frequencies, rather
than using magic numbers in the code ?

+	if (ret)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int fimc_is_probe(struct platform_device *pdev)
+{
+	struct device *dev =&pdev->dev;
+	struct resource res;
+	struct fimc_is *is;
+	struct pinctrl *pctrl;
+	void __iomem *regs;
+	struct device_node *node;
+	int irq, ret;
+
+	pr_debug("FIMC-IS Probe Enter\n");
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	is = devm_kzalloc(&pdev->dev, sizeof(*is), GFP_KERNEL);
+	if (!is)
+		return -ENOMEM;
+
+	is->pdev = pdev;

+	ret = of_address_to_resource(dev->of_node, 0,&res);
+	if (ret<  0)
+		return ret;

It could be simplified to:
	
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

and 'res' could be passed to devm_ioremap_resource() without any checks.

+	regs = devm_ioremap_resource(dev,&res);
+	if (regs == NULL) {
+		dev_err(dev, "Failed to obtain io memory\n");
+		return -ENOENT;
+	}
+
+	/* Get the PMU base */
+	node = of_get_child_by_name(dev->of_node, "pmu");
+	if (!node)
+		return -ENODEV;
+	is->pmu_regs = of_iomap(node, 0);
+	if (!is->pmu_regs)
+		return -ENOMEM;
+
+	irq = irq_of_parse_and_map(dev->of_node, 0);
+	if (irq<  0) {
+		dev_err(dev, "Failed to get IRQ\n");
+		return irq;
+	}
+
+	ret = fimc_is_clk_cfg(is);
+	if (ret<  0) {
+		dev_err(dev, "Clock config failed\n");
+		goto err_clk;
+	}
+
+	platform_set_drvdata(pdev, is);
+	pm_runtime_enable(dev);
+
+	ret = pm_runtime_get_sync(dev);
+	if (ret<  0)
+		goto err_clk;
+
+	is->alloc_ctx = vb2_dma_contig_init_ctx(dev);
+	if (IS_ERR(is->alloc_ctx)) {
+		ret = PTR_ERR(is->alloc_ctx);
+		goto err_pm;
+	}
+
+	/* Init FIMC Pipeline */

s/Init/Initialize ?

+	ret = fimc_is_pipeline_init(&is->pipeline, 0, is);
+	if (ret<  0)
+		goto err_sd;
+
+	/* Init FIMC Interface */

s/Init/ Initialize

+	ret = fimc_is_interface_init(&is->interface, regs, irq);
+	if (ret<  0)
+		goto err_sd;
+
+	pm_runtime_put(dev);
+
+	dev_dbg(dev, "FIMC-IS registered successfully\n");
+
+	return 0;
+
+err_sd:
+	fimc_is_pipeline_destroy(&is->pipeline);
+err_vb:
+	vb2_dma_contig_cleanup_ctx(is->alloc_ctx);
+err_pm:
+	pm_runtime_put(dev);
+err_clk:
+	fimc_is_clk_put(is);
+
+	return ret;
+}
+
+int fimc_is_clk_enable(struct fimc_is *is)
+{
+	int ret;
+
+	ret = clk_enable(is->clock[IS_CLK_ISP]);
+	ret |= clk_enable(is->clock[IS_CLK_MCU_ISP]);

Please don't obfuscate the return value.

+	return ret;
+}
+
+void fimc_is_clk_disable(struct fimc_is *is)
+{
+	clk_disable(is->clock[IS_CLK_ISP]);
+	clk_disable(is->clock[IS_CLK_MCU_ISP]);
+}
+
+static int fimc_is_pm_resume(struct device *dev)
+{
+	struct fimc_is *is = dev_get_drvdata(dev);
+	int ret;
+
+	ret = fimc_is_clk_enable(is);
+	if (ret<  0)
+		dev_err(dev, "Could not enable clocks\n");
+
+	return 0;
+}
+
+static int fimc_is_pm_suspend(struct device *dev)
+{
+	struct fimc_is *is = dev_get_drvdata(dev);
+
+	fimc_is_clk_disable(is);
+	return 0;
+}
+
+static int fimc_is_runtime_resume(struct device *dev)
+{
+	return fimc_is_pm_resume(dev);
+}
+
+static int fimc_is_runtime_suspend(struct device *dev)
+{
+	return fimc_is_pm_suspend(dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int fimc_is_resume(struct device *dev)
+{
+	return fimc_is_pm_resume(dev);
+}
+
+static int fimc_is_suspend(struct device *dev)
+{
+	return fimc_is_pm_suspend(dev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static int fimc_is_remove(struct platform_device *pdev)
+{
+	struct fimc_is *is = platform_get_drvdata(pdev);
+	struct device *dev =&pdev->dev;
+
+	pm_runtime_disable(dev);
+	pm_runtime_set_suspended(dev);
+	fimc_is_pipeline_destroy(&is->pipeline);
+	vb2_dma_contig_cleanup_ctx(is->alloc_ctx);
+	fimc_is_clk_put(is);
+
+	return 0;
+}
+
+static const struct dev_pm_ops fimc_is_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(fimc_is_suspend, fimc_is_resume)
+	SET_RUNTIME_PM_OPS(fimc_is_runtime_suspend, fimc_is_runtime_resume,
+			   NULL)
+};
+
+static const struct of_device_id exynos5_fimc_is_match[] = {
+	{
+		.compatible = "samsung,exynos5250-fimc-is",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, exynos5_fimc_is_match);
+
+static struct platform_driver fimc_is_driver = {
+	.probe		= fimc_is_probe,
+	.remove		= fimc_is_remove,
+	.driver = {
+		.name	= FIMC_IS_DRV_NAME,
+		.owner	= THIS_MODULE,
+		.pm	=&fimc_is_pm_ops,
+		.of_match_table = exynos5_fimc_is_match,
+	}
+};
+module_platform_driver(fimc_is_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arun Kumar K<arun.kk@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Samsung Exynos5 (FIMC-IS) Imaging Subsystem driver");
diff --git a/drivers/media/platform/exynos5-is/fimc-is-core.h b/drivers/media/platform/exynos5-is/fimc-is-core.h
new file mode 100644
index 0000000..0512280
--- /dev/null
+++ b/drivers/media/platform/exynos5-is/fimc-is-core.h
@@ -0,0 +1,126 @@
+/*
+ * Samsung EXYNOS5 FIMC-IS (Imaging Subsystem) driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ *  Arun Kumar K<arun.kk@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef FIMC_IS_CORE_H_
+#define FIMC_IS_CORE_H_
+
+#include<linux/bug.h>
+#include<linux/clk.h>
+#include<linux/device.h>
+#include<linux/errno.h>
+#include<linux/firmware.h>
+#include<linux/interrupt.h>
+#include<linux/kernel.h>
+#include<linux/list.h>
+#include<linux/module.h>
+#include<linux/types.h>
+#include<linux/platform_device.h>
+#include<linux/pm_runtime.h>
+#include<linux/slab.h>
+#include<linux/videodev2.h>
+
+#include<asm/barrier.h>
+#include<linux/sizes.h>
+#include<linux/io.h>
+#include<linux/irqreturn.h>
+#include<linux/platform_device.h>
+#include<linux/sched.h>
+#include<linux/spinlock.h>
+
+#include<media/media-entity.h>
+#include<media/videobuf2-core.h>
+#include<media/v4l2-ctrls.h>
+#include<media/v4l2-device.h>
+#include<media/v4l2-mem2mem.h>
+#include<media/v4l2-mediabus.h>
+#include<media/s5p_fimc.h>
+
+#define FIMC_IS_DRV_NAME		"exynos5-fimc-is"
+#define FIMC_IS_CLK_NAME		"fimc_is"

Unused symbol, please remove.

+#define FIMC_IS_DEBUG_MSG		0x3f
+#define FIMC_IS_DEBUG_LEVEL		3

These 2 are unused too.

+#define FIMC_IS_COMMAND_TIMEOUT		(3*HZ)
+#define FIMC_IS_STARTUP_TIMEOUT		(3*HZ)
+#define FIMC_IS_SHUTDOWN_TIMEOUT	(10*HZ)

Please add spaces around '*'. It also applies to other places in most
of the patches.

+
+#define FW_SHARED_OFFSET		(0x8C0000)

+#define DEBUG_CNT			(500*1024)
+#define DEBUG_OFFSET			(0x840000)
+#define DEBUGCTL_OFFSET			(0x8BD000)
+#define DEBUG_FCOUNT			(0x8C64C0)

Please put all hex numbers in lower case.

+#define FIMC_IS_MAX_INSTANCES		1
+
+#define FIMC_IS_MAX_GPIOS		32
+#define FIMC_IS_NUM_SENSORS		2
+
+#define FIMC_IS_MAX_PLANES		3
+#define FIMC_IS_NUM_SCALERS		2
+
+enum fimc_is_clks {
+	IS_CLK_ISP,
+	IS_CLK_MCU_ISP,
+	IS_CLK_ISP_DIV0,
+	IS_CLK_ISP_DIV1,
+	IS_CLK_ISP_DIVMPWM,
+	IS_CLK_MCU_ISP_DIV0,
+	IS_CLK_MCU_ISP_DIV1,
+	IS_CLK_MAX_NUM
+};
+
+/* Video capture states */
+enum fimc_is_video_state {
+	STATE_INIT,
+	STATE_BUFS_ALLOCATED,
+	STATE_RUNNING,
+};
+
+enum fimc_is_scaler_id {
+	SCALER_SCC,
+	SCALER_SCP
+};
+
+enum fimc_is_sensor_pos {
+	SENSOR_CAM0,
+	SENSOR_CAM1
+};
+
+struct fimc_is_buf {
+	struct list_head list;
+	struct vb2_buffer *vb;
+	unsigned int paddr[FIMC_IS_MAX_PLANES];
+};
+
+struct fimc_is_meminfo {
+	unsigned int fw_paddr;
+	unsigned int fw_vaddr;
+	unsigned int region_paddr;
+	unsigned int region_vaddr;
+	unsigned int shared_paddr;
+	unsigned int shared_vaddr;
+};
+
+/**
+ * struct fimc_is_fmt - the driver's internal color format data
+ * @name: format description
+ * @fourcc: the fourcc code for this format
+ * @depth: number of bytes per pixel
+ * @num_planes: number of planes for this color format
+ */
+struct fimc_is_fmt {
+	char		*name;
+	unsigned int	fourcc;
+	unsigned int	depth[FIMC_IS_MAX_PLANES];
+	unsigned int	num_planes;
+};
+
+#endif

Regards,
Sylwester
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux