Hi Arun,
Thanks for the patch. A few comments below.
On Tue, Nov 05, 2013 at 11:42:33AM +0530, 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>
> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> ---
> drivers/media/platform/exynos5-is/fimc-is-core.c | 410 ++++++++++++++++++++++
> drivers/media/platform/exynos5-is/fimc-is-core.h | 132 +++++++
> 2 files changed, 542 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..2b116d0
> --- /dev/null
> +++ b/drivers/media/platform/exynos5-is/fimc-is-core.c
> @@ -0,0 +1,410 @@
> +/*
> + * 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/err.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/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 <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/videodev2.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>
Do you really need all these headers?
> +#include "fimc-is.h"
> +#include "fimc-is-i2c.h"
> +
> +#define CLK_MCU_ISP_DIV0_FREQ (200 * 1000000)
> +#define CLK_MCU_ISP_DIV1_FREQ (100 * 1000000)
> +#define CLK_ISP_DIV0_FREQ (134 * 1000000)
> +#define CLK_ISP_DIV1_FREQ (68 * 1000000)
> +#define CLK_ISP_DIVMPWM_FREQ (34 * 1000000)
> +
> +static const char * const 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_put_clocks(struct fimc_is *is)
> +{
> + int i;
> +
> + for (i = 0; i < IS_CLK_MAX_NUM; i++) {
> + if (IS_ERR(is->clock[i]))
> + continue;
> + clk_unprepare(is->clock[i]);
> + clk_put(is->clock[i]);
> + is->clock[i] = ERR_PTR(-EINVAL);
> + }
> +}
> +
> +static int fimc_is_get_clocks(struct fimc_is *is)
> +{
> + 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] = ERR_PTR(-EINVAL);
> + goto err;
> + }
> + }
> + return 0;
> +err:
> + fimc_is_put_clocks(is);
> + pr_err("Failed to get clock: %s\n", fimc_is_clock_name[i]);
How about dev_err() instead?
> + return -ENXIO;
> +}
> +
> +static int fimc_is_configure_clocks(struct fimc_is *is)
> +{
> + int i, ret;
> +
> + for (i = 0; i < IS_CLK_MAX_NUM; i++)
> + is->clock[i] = ERR_PTR(-EINVAL);
> +
> + ret = fimc_is_get_clocks(is);
> + if (ret)
> + return ret;
> +
> + /* Set rates */
> + ret = clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV0],
> + CLK_MCU_ISP_DIV0_FREQ);
> + if (ret)
> + return ret;
> + ret = clk_set_rate(is->clock[IS_CLK_MCU_ISP_DIV1],
> + CLK_MCU_ISP_DIV1_FREQ);
> + if (ret)
> + return ret;
> + ret = clk_set_rate(is->clock[IS_CLK_ISP_DIV0], CLK_ISP_DIV0_FREQ);
> + if (ret)
> + return ret;
> + ret = clk_set_rate(is->clock[IS_CLK_ISP_DIV1], CLK_ISP_DIV1_FREQ);
> + if (ret)
> + return ret;
> + ret = clk_set_rate(is->clock[IS_CLK_ISP_DIVMPWM],
> + CLK_ISP_DIVMPWM_FREQ);
> + return ret;
You can return the return value from clk_set_rate() directly here.
> +}
> +
> +static void fimc_is_pipelines_destroy(struct fimc_is *is)
> +{
> + int i;
> +
> + for (i = 0; i < is->drvdata->num_instances; i++)
> + fimc_is_pipeline_destroy(&is->pipeline[i]);
> +}
> +
> +static int fimc_is_parse_sensor_config(struct fimc_is *is, unsigned int index,
> + struct device_node *node)
> +{
> + struct fimc_is_sensor *sensor = &is->sensor[index];
> + u32 tmp = 0;
> + int ret;
> +
> + sensor->drvdata = exynos5_is_sensor_get_drvdata(node);
> + if (!sensor->drvdata) {
> + dev_err(&is->pdev->dev, "no driver data found for: %s\n",
> + node->full_name);
> + return -EINVAL;
> + }
> +
> + node = v4l2_of_get_next_endpoint(node, NULL);
> + if (!node)
> + return -ENXIO;
> +
> + node = v4l2_of_get_remote_port(node);
> + if (!node)
> + return -ENXIO;
> +
> + /* Use MIPI-CSIS channel id to determine the ISP I2C bus index. */
> + ret = of_property_read_u32(node, "reg", &tmp);
> + if (ret < 0) {
> + dev_err(&is->pdev->dev, "reg property not found at: %s\n",
> + node->full_name);
> + return ret;
> + }
> +
> + sensor->i2c_bus = tmp - FIMC_INPUT_MIPI_CSI2_0;
> + return 0;
> +}
> +
> +static int fimc_is_parse_sensor(struct fimc_is *is)
> +{
> + struct device_node *i2c_bus, *child;
> + int ret, index = 0;
You could define ret in the inner loop. Up to you.
> +
> + for_each_compatible_node(i2c_bus, NULL, FIMC_IS_I2C_COMPATIBLE) {
> + for_each_available_child_of_node(i2c_bus, child) {
> + ret = fimc_is_parse_sensor_config(is, index, child);
> +
> + if (ret < 0 || index >= FIMC_IS_NUM_SENSORS) {
> + of_node_put(child);
> + return ret;
> + }
> + index++;
> + }
> + }
> + return 0;
> +}
> +
> +static void *fimc_is_get_drvdata(struct platform_device *pdev);
By moving the function here, you could avoid having an "extra" prototype for
a local function.
> +static int fimc_is_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct resource *res;
> + struct fimc_is *is;
> + void __iomem *regs;
> + struct device_node *node;
> + int irq, ret;
> + int i;
> +
> + dev_dbg(dev, "FIMC-IS Probe Enter\n");
> +
> + if (!dev->of_node)
> + return -ENODEV;
> +
> + is = devm_kzalloc(&pdev->dev, sizeof(*is), GFP_KERNEL);
> + if (!is)
> + return -ENOMEM;
> +
> + is->pdev = pdev;
> +
> + is->drvdata = fimc_is_get_drvdata(pdev);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + regs = devm_ioremap_resource(dev, res);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);
> +
> + /* Get the PMU base */
> + node = of_parse_phandle(dev->of_node, "samsung,pmu", 0);
> + 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);
irq_of_parse_and_map() returns zero on error.
> + if (irq < 0) {
> + dev_err(dev, "Failed to get IRQ\n");
> + return irq;
> + }
> +
> + ret = fimc_is_configure_clocks(is);
> + if (ret < 0) {
> + dev_err(dev, "clocks configuration failed\n");
> + goto err_clk;
> + }
> +
> + platform_set_drvdata(pdev, is);
> + pm_runtime_enable(dev);
> +
> + is->alloc_ctx = vb2_dma_contig_init_ctx(dev);
> + if (IS_ERR(is->alloc_ctx)) {
> + ret = PTR_ERR(is->alloc_ctx);
> + goto err_vb;
> + }
> +
> + /* Get IS-sensor contexts */
> + ret = fimc_is_parse_sensor(is);
> + if (ret < 0)
> + goto err_vb;
> +
> + /* Initialize FIMC Pipeline */
> + for (i = 0; i < is->drvdata->num_instances; i++) {
> + ret = fimc_is_pipeline_init(&is->pipeline[i], i, is);
> + if (ret < 0)
> + goto err_sd;
> + }
> +
> + /* Initialize FIMC Interface */
> + ret = fimc_is_interface_init(&is->interface, regs, irq);
> + if (ret < 0)
> + goto err_sd;
> +
> + /* Probe the peripheral devices */
> + ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
> + if (ret < 0)
> + goto err_sd;
> +
> + dev_dbg(dev, "FIMC-IS registered successfully\n");
> +
> + return 0;
> +
> +err_sd:
> + fimc_is_pipelines_destroy(is);
> +err_vb:
> + vb2_dma_contig_cleanup_ctx(is->alloc_ctx);
> +err_clk:
> + fimc_is_put_clocks(is);
> +
> + return ret;
> +}
> +
> +int fimc_is_clk_enable(struct fimc_is *is)
> +{
> + int ret;
> +
> + ret = clk_enable(is->clock[IS_CLK_ISP]);
> + if (ret)
> + return ret;
> + ret = clk_enable(is->clock[IS_CLK_MCU_ISP]);
> + if (ret)
> + clk_disable(is->clock[IS_CLK_ISP]);
> + 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 ret;
> + }
> + 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)
> +{
> + /* TODO */
> + return 0;
> +}
> +
> +static int fimc_is_suspend(struct device *dev)
> +{
> + /* TODO */
> + return 0;
> +}
> +#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_pipelines_destroy(is);
> + vb2_dma_contig_cleanup_ctx(is->alloc_ctx);
> + fimc_is_put_clocks(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 struct fimc_is_drvdata exynos5250_drvdata = {
> + .num_instances = 1,
> + .fw_name = "exynos5_fimc_is_fw.bin",
> +};
> +
> +static const struct of_device_id exynos5_fimc_is_match[] = {
> + {
> + .compatible = "samsung,exynos5250-fimc-is",
> + .data = &exynos5250_drvdata,
> + },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, exynos5_fimc_is_match);
> +
> +static void *fimc_is_get_drvdata(struct platform_device *pdev)
> +{
> + struct fimc_is_drvdata *driver_data = NULL;
> + const struct of_device_id *match;
> +
> + match = of_match_node(exynos5_fimc_is_match,
> + pdev->dev.of_node);
> + if (match)
> + driver_data = (struct fimc_is_drvdata *)match->data;
> + return driver_data;
> +}
> +
> +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..c27b603
> --- /dev/null
> +++ b/drivers/media/platform/exynos5-is/fimc-is-core.h
> @@ -0,0 +1,132 @@
> +/*
> + * 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 <asm/barrier.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/io.h>
> +#include <linux/irqreturn.h>
> +#include <linux/kernel.h>
> +#include <linux/list.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/sched.h>
> +#include <linux/sizes.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.h>
> +#include <linux/types.h>
> +#include <linux/videodev2.h>
> +
> +#include <media/media-entity.h>
> +#include <media/s5p_fimc.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>
Same here: do you really need all these headers here?
> +#define FIMC_IS_DRV_NAME "exynos5-fimc-is"
> +
> +#define FIMC_IS_COMMAND_TIMEOUT (10 * HZ)
> +#define FIMC_IS_STARTUP_TIMEOUT (3 * HZ)
> +#define FIMC_IS_SHUTDOWN_TIMEOUT (10 * HZ)
> +
> +#define FW_SHARED_OFFSET (0x8c0000)
> +#define DEBUG_CNT (500 * 1024)
> +#define DEBUG_OFFSET (0x840000)
> +#define DEBUGCTL_OFFSET (0x8bd000)
> +#define DEBUG_FCOUNT (0x8c64c0)
> +
> +#define FIMC_IS_MAX_INSTANCES 1
> +
> +#define FIMC_IS_NUM_SENSORS 2
> +#define FIMC_IS_NUM_PIPELINES 1
> +
> +#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 vb2_buffer vb;
> + struct list_head list;
> + unsigned int paddr[FIMC_IS_MAX_PLANES];
> +};
> +
> +struct fimc_is_memory {
> + /* physical base address */
> + dma_addr_t paddr;
> + /* virtual base address */
> + void *vaddr;
> + /* total length */
> + unsigned int size;
> +};
> +
> +struct fimc_is_meminfo {
> + struct fimc_is_memory fw;
> + struct fimc_is_memory shot;
> + struct fimc_is_memory region;
> + struct fimc_is_memory shared;
> +};
> +
> +struct fimc_is_drvdata {
> + unsigned int num_instances;
> + char *fw_name;
> +};
> +
> +/**
> + * 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
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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