[PATCH 1/3 v2] ezx: Add camera support for A780 and A910 EZX phones
Guennadi Liakhovetski
g.liakhovetski at gmx.de
Wed Nov 4 18:53:46 EST 2009
On Wed, 4 Nov 2009, Antonio Ospite wrote:
> Signed-off-by: Antonio Ospite <ospite at studenti.unina.it>
> Signed-off-by: Bart Visscher <bartv at thisnet.nl>
Is this patch going via Bart? Or should this be an Acked-by?
> ---
>
> Changes since previous version:
> Addressed all the comments from Eric and Guennadi.
I said I still wanted to have a better look at it, so, basically, I just
think you have a typo in two comments:
>
> CAM_RST gpios are different for different platform generations, as also
> shown in current MFP pins setup.
>
>
> arch/arm/mach-pxa/ezx.c | 164 +++++++++++++++++++++++++++++++++++++++++++++++
> 1 files changed, 164 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/ezx.c b/arch/arm/mach-pxa/ezx.c
> index 588b265..7cfd633 100644
> --- a/arch/arm/mach-pxa/ezx.c
> +++ b/arch/arm/mach-pxa/ezx.c
> @@ -17,8 +17,11 @@
> #include <linux/delay.h>
> #include <linux/pwm_backlight.h>
> #include <linux/input.h>
> +#include <linux/gpio.h>
> #include <linux/gpio_keys.h>
>
> +#include <media/soc_camera.h>
> +
> #include <asm/setup.h>
> #include <asm/mach-types.h>
> #include <asm/mach/arch.h>
> @@ -29,6 +32,7 @@
> #include <plat/i2c.h>
> #include <mach/hardware.h>
> #include <mach/pxa27x_keypad.h>
> +#include <mach/camera.h>
>
> #include "devices.h"
> #include "generic.h"
> @@ -38,6 +42,9 @@
> #define GPIO15_A910_FLIP_LID 15
> #define GPIO12_E680_LOCK_SWITCH 12
> #define GPIO15_E6_LOCK_SWITCH 15
> +#define GPIO50_nCAM_EN 50
> +#define GPIO19_GEN1_CAM_RST 19
> +#define GPIO28_GEN2_CAM_RST 28
>
> static struct platform_pwm_backlight_data ezx_backlight_data = {
> .pwm_id = 0,
> @@ -683,8 +690,85 @@ static struct platform_device a780_gpio_keys = {
> },
> };
>
> +/* camera */
> +static int a780_pxacamera_init(struct device *dev)
> +{
> + int err;
> +
> + /*
> + * GPIO50_nCAM_EN is active low
> + * GPIO19_GEN1_CAM_RST is active high
> + */
> + err = gpio_request(GPIO50_nCAM_EN, "nCAM_EN");
> + if (err) {
> + pr_err("%s: Failed to request nCAM_EN\n", __func__);
> + goto fail;
> + }
> +
> + err = gpio_request(GPIO19_GEN1_CAM_RST, "CAM_RST");
> + if (err) {
> + pr_err("%s: Failed to request CAM_RST\n", __func__);
> + goto fail_gpio_cam_rst;
> + }
> +
> + gpio_direction_output(GPIO50_nCAM_EN, 0);
> + gpio_direction_output(GPIO19_GEN1_CAM_RST, 1);
Don't understand this, are you sure your comments are correct? This would
mean, that in init() you enable the camera and hold it in reset.
> +
> + return 0;
> +
> +fail_gpio_cam_rst:
> + gpio_free(GPIO50_nCAM_EN);
> +fail:
> + return err;
> +}
> +
> +static int a780_pxacamera_power(struct device *dev, int on)
> +{
> + gpio_set_value(GPIO50_nCAM_EN, !on);
This agrees with the comment above, but then why do you enable it
immediately in init?
> + return 0;
> +}
> +
> +static int a780_pxacamera_reset(struct device *dev)
> +{
> + gpio_set_value(GPIO19_GEN1_CAM_RST, 0);
> + msleep(10);
> + gpio_set_value(GPIO19_GEN1_CAM_RST, 1);
This, however, seems to contradict the comment and confirm the code above
- looks like your reset pin is active low too?
> +
> + return 0;
> +}
> +
> +struct pxacamera_platform_data a780_pxacamera_platform_data = {
> + .init = a780_pxacamera_init,
> + .flags = PXA_CAMERA_MASTER | PXA_CAMERA_DATAWIDTH_8 |
> + PXA_CAMERA_PCLK_EN | PXA_CAMERA_MCLK_EN,
> + .mclk_10khz = 5000,
> +};
> +
> +static struct i2c_board_info a780_camera_i2c_board_info = {
> + I2C_BOARD_INFO("mt9m111", 0x5d),
> +};
> +
> +static struct soc_camera_link a780_iclink = {
> + .bus_id = 0,
> + .flags = SOCAM_SENSOR_INVERT_PCLK,
Do you have schematics or have you found this out experimentally? What
happens if you don't invert pclk?
> + .i2c_adapter_id = 0,
> + .board_info = &a780_camera_i2c_board_info,
> + .module_name = "mt9m111",
> + .power = a780_pxacamera_power,
> + .reset = a780_pxacamera_reset,
> +};
> +
> +static struct platform_device a780_camera = {
> + .name = "soc-camera-pdrv",
> + .id = 0,
> + .dev = {
> + .platform_data = &a780_iclink,
> + },
> +};
> +
> static struct platform_device *a780_devices[] __initdata = {
> &a780_gpio_keys,
> + &a780_camera,
> };
>
> static void __init a780_init(void)
> @@ -699,6 +783,8 @@ static void __init a780_init(void)
>
> pxa_set_keypad_info(&a780_keypad_platform_data);
>
> + pxa_set_camera_info(&a780_pxacamera_platform_data);
> +
> platform_add_devices(ARRAY_AND_SIZE(ezx_devices));
> platform_add_devices(ARRAY_AND_SIZE(a780_devices));
> }
> @@ -864,8 +950,84 @@ static struct platform_device a910_gpio_keys = {
> },
> };
>
> +/* camera */
> +static int a910_pxacamera_init(struct device *dev)
> +{
> + int err;
> +
> + /*
> + * GPIO50_nCAM_EN is active low
> + * GPIO28_GEN2_CAM_RST is active high
> + */
> + err = gpio_request(GPIO50_nCAM_EN, "nCAM_EN");
> + if (err) {
> + pr_err("%s: Failed to request nCAM_EN\n", __func__);
> + goto fail;
> + }
> +
> + err = gpio_request(GPIO28_GEN2_CAM_RST, "CAM_RST");
> + if (err) {
> + pr_err("%s: Failed to request CAM_RST\n", __func__);
> + goto fail_gpio_cam_rst;
> + }
> +
> + gpio_direction_output(GPIO50_nCAM_EN, 0);
> + gpio_direction_output(GPIO28_GEN2_CAM_RST, 1);
ditto
> +
> + return 0;
> +
> +fail_gpio_cam_rst:
> + gpio_free(GPIO50_nCAM_EN);
> +fail:
> + return err;
> +}
> +
> +static int a910_pxacamera_power(struct device *dev, int on)
> +{
> + gpio_set_value(GPIO50_nCAM_EN, !on);
> + return 0;
> +}
> +
> +static int a910_pxacamera_reset(struct device *dev)
> +{
> + gpio_set_value(GPIO28_GEN2_CAM_RST, 0);
> + msleep(10);
> + gpio_set_value(GPIO28_GEN2_CAM_RST, 1);
> +
> + return 0;
> +}
> +
> +struct pxacamera_platform_data a910_pxacamera_platform_data = {
> + .init = a910_pxacamera_init,
> + .flags = PXA_CAMERA_MASTER | PXA_CAMERA_DATAWIDTH_8 |
> + PXA_CAMERA_PCLK_EN | PXA_CAMERA_MCLK_EN,
> + .mclk_10khz = 5000,
> +};
> +
> +static struct i2c_board_info a910_camera_i2c_board_info = {
> + I2C_BOARD_INFO("mt9m111", 0x5d),
> +};
> +
> +static struct soc_camera_link a910_iclink = {
> + .bus_id = 0,
> + .i2c_adapter_id = 0,
> + .board_info = &a910_camera_i2c_board_info,
> + .module_name = "mt9m111",
> + .power = a910_pxacamera_power,
> + .reset = a910_pxacamera_reset,
> +};
> +
> +static struct platform_device a910_camera = {
> + .name = "soc-camera-pdrv",
> + .id = 0,
> + .dev = {
> + .platform_data = &a910_iclink,
> + },
> +};
> +
> static struct platform_device *a910_devices[] __initdata = {
> &a910_gpio_keys,
> + &a910_camera,
> };
>
> static void __init a910_init(void)
> @@ -880,6 +1042,8 @@ static void __init a910_init(void)
>
> pxa_set_keypad_info(&a910_keypad_platform_data);
>
> + pxa_set_camera_info(&a910_pxacamera_platform_data);
> +
> platform_add_devices(ARRAY_AND_SIZE(ezx_devices));
> platform_add_devices(ARRAY_AND_SIZE(a910_devices));
> }
> --
> 1.6.5.2
>
A general question for the ezx.c: wouldn't it be better to convert that
full-of-ifdef's file to a mach-pxa/ezx/ directory?
Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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