Re: [PATCH v3 2/2] at91: add Atmel ISI and ov2640 support onsam9m10/sam9g45 board.

From: Guennadi Liakhovetski
Date: Thu Sep 22 2011 - 03:38:45 EST

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In reply to: Josh Wu: "[PATCH v3 2/2] at91: add Atmel ISI and ov2640 support on sam9m10/sam9g45 board."
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On Thu, 22 Sep 2011, Josh Wu wrote:

> This patch
> 1. add ISI_MCK parent setting code when add ISI device.
> 2. add ov2640 support on board file.
> 3. define isi_mck clock in sam9g45 chip file.
>
> Signed-off-by: Josh Wu <josh.wu@xxxxxxxxx>
> ---
> arch/arm/mach-at91/at91sam9g45.c | 3 +
> arch/arm/mach-at91/at91sam9g45_devices.c | 105 +++++++++++++++++++++++++++++-
> arch/arm/mach-at91/board-sam9m10g45ek.c | 85 ++++++++++++++++++++++++-
> arch/arm/mach-at91/include/mach/board.h | 3 +-

Personally, I think, it would be better to separate this into two patches
at least: one for at91 core and one for the specific board, but that's up
to arch maintainers to decide.

You also want to patch arch/arm/mach-at91/at91sam9263_devices.c, don't
you?

> 4 files changed, 193 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
> index e04c5fb..5e23d6d 100644
> --- a/arch/arm/mach-at91/at91sam9g45.c
> +++ b/arch/arm/mach-at91/at91sam9g45.c
> @@ -201,6 +201,7 @@ static struct clk *periph_clocks[] __initdata = {
> // irq0
> };
>
> +static struct clk pck1;

Hm, it really doesn't need any initialisation, not even for the .type
field? .type=0 doesn't seem to be valid.

> static struct clk_lookup periph_clocks_lookups[] = {
> /* One additional fake clock for ohci */
> CLKDEV_CON_ID("ohci_clk", &uhphs_clk),
> @@ -215,6 +216,8 @@ static struct clk_lookup periph_clocks_lookups[] = {
> CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tcb0_clk),
> CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
> CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
> + /* ISI_MCK, which is provided by programmable clock(PCK1) */
> + CLKDEV_CON_DEV_ID("isi_mck", "atmel_isi.0", &pck1),
> };
>
> static struct clk_lookup usart_clocks_lookups[] = {
> diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
> index 600bffb..82eeac8 100644
> --- a/arch/arm/mach-at91/at91sam9g45_devices.c
> +++ b/arch/arm/mach-at91/at91sam9g45_devices.c
> @@ -16,7 +16,7 @@
> #include <linux/platform_device.h>
> #include <linux/i2c-gpio.h>
> #include <linux/atmel-mci.h>
> -
> +#include <linux/clk.h>
> #include <linux/fb.h>
> #include <video/atmel_lcdc.h>
>
> @@ -28,6 +28,8 @@
> #include <mach/at_hdmac.h>
> #include <mach/atmel-mci.h>
>
> +#include <media/atmel-isi.h>
> +
> #include "generic.h"
>
>
> @@ -863,6 +865,107 @@ void __init at91_add_device_ac97(struct ac97c_platform_data *data)
> void __init at91_add_device_ac97(struct ac97c_platform_data *data) {}
> #endif
>
> +/* --------------------------------------------------------------------
> + * Image Sensor Interface
> + * -------------------------------------------------------------------- */
> +#if defined(CONFIG_VIDEO_ATMEL_ISI) || defined(CONFIG_VIDEO_ATMEL_ISI_MODULE)
> +static u64 isi_dmamask = DMA_BIT_MASK(32);
> +static struct isi_platform_data isi_data;
> +
> +struct resource isi_resources[] = {
> + [0] = {
> + .start = AT91SAM9G45_BASE_ISI,
> + .end = AT91SAM9G45_BASE_ISI + SZ_16K - 1,
> + .flags = IORESOURCE_MEM,
> + },
> + [1] = {
> + .start = AT91SAM9G45_ID_ISI,
> + .end = AT91SAM9G45_ID_ISI,
> + .flags = IORESOURCE_IRQ,
> + },
> +};
> +
> +static struct platform_device at91sam9g45_isi_device = {
> + .name = "atmel_isi",
> + .id = 0,
> + .dev = {
> + .dma_mask = &isi_dmamask,
> + .coherent_dma_mask = DMA_BIT_MASK(32),
> + .platform_data = &isi_data,
> + },
> + .resource = isi_resources,
> + .num_resources = ARRAY_SIZE(isi_resources),
> +};
> +
> +static int __init isi_set_clk_parent(void)
> +{
> + struct clk *pck1;
> + struct clk *plla;
> + int ret;
> +
> + /* ISI_MCK is supplied by PCK1 - set parent for it. */
> + pck1 = clk_get(NULL, "pck1");
> + if (IS_ERR(pck1)) {
> + printk(KERN_ERR "Failed to get PCK1\n");
> + ret = PTR_ERR(pck1);
> + goto err;
> + }
> +
> + plla = clk_get(NULL, "plla");
> + if (IS_ERR(plla)) {
> + printk(KERN_ERR "Failed to get PLLA\n");
> + ret = PTR_ERR(plla);
> + goto err_pck1;
> + }
> + ret = clk_set_parent(pck1, plla);
> + clk_put(plla);
> + if (ret != 0) {
> + printk(KERN_ERR "Failed to set PCK1 parent\n");
> + goto err_pck1;
> + }
> + return ret;
> +
> +err_pck1:
> + clk_put(pck1);
> +err:
> + return ret;
> +}
> +
> +void __init at91_add_device_isi(struct isi_platform_data * data)
> +{
> + if (!data)
> + return;
> + isi_data = *data;
> +
> + at91_set_A_periph(AT91_PIN_PB20, 0); /* ISI_D0 */
> + at91_set_A_periph(AT91_PIN_PB21, 0); /* ISI_D1 */
> + at91_set_A_periph(AT91_PIN_PB22, 0); /* ISI_D2 */
> + at91_set_A_periph(AT91_PIN_PB23, 0); /* ISI_D3 */
> + at91_set_A_periph(AT91_PIN_PB24, 0); /* ISI_D4 */
> + at91_set_A_periph(AT91_PIN_PB25, 0); /* ISI_D5 */
> + at91_set_A_periph(AT91_PIN_PB26, 0); /* ISI_D6 */
> + at91_set_A_periph(AT91_PIN_PB27, 0); /* ISI_D7 */
> + at91_set_A_periph(AT91_PIN_PB28, 0); /* ISI_PCK */
> + at91_set_A_periph(AT91_PIN_PB30, 0); /* ISI_HSYNC */
> + at91_set_A_periph(AT91_PIN_PB29, 0); /* ISI_VSYNC */
> + at91_set_B_periph(AT91_PIN_PB31, 0); /* ISI_MCK (PCK1) */
> + at91_set_B_periph(AT91_PIN_PB8, 0); /* ISI_PD8 */
> + at91_set_B_periph(AT91_PIN_PB9, 0); /* ISI_PD9 */
> + at91_set_B_periph(AT91_PIN_PB10, 0); /* ISI_PD10 */
> + at91_set_B_periph(AT91_PIN_PB11, 0); /* ISI_PD11 */
> +
> + platform_device_register(&at91sam9g45_isi_device);
> +
> + if (isi_set_clk_parent())
> + printk(KERN_ERR "Fail to set parent for ISI_MCK.\n");
> +
> + return;
> +}
> +#else
> +static int __init isi_set_clk_parent(void) { }
> +void __init at91_add_device_isi(struct isi_platform_data * data) { }
> +#endif
> +
>
> /* --------------------------------------------------------------------
> * LCD Controller
> diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
> index ad234cc..d5293fb 100644
> --- a/arch/arm/mach-at91/board-sam9m10g45ek.c
> +++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
> @@ -23,11 +23,13 @@
> #include <linux/gpio_keys.h>
> #include <linux/input.h>
> #include <linux/leds.h>
> -#include <linux/clk.h>
> #include <linux/atmel-mci.h>
> +#include <linux/delay.h>
>
> #include <mach/hardware.h>
> #include <video/atmel_lcdc.h>
> +#include <media/soc_camera.h>
> +#include <media/atmel-isi.h>
>
> #include <asm/setup.h>
> #include <asm/mach-types.h>
> @@ -185,6 +187,83 @@ static void __init ek_add_device_nand(void)
> at91_add_device_nand(&ek_nand_data);
> }
>
> +/*
> + * ISI
> + */
> +#if defined(CONFIG_VIDEO_ATMEL_ISI) || defined(CONFIG_VIDEO_ATMEL_ISI_MODULE)
> +static struct isi_platform_data __initdata isi_data = {
> + .frate = ISI_CFG1_FRATE_CAPTURE_ALL,
> + .has_emb_sync = 0,
> + .emb_crc_sync = 0,
> + .hsync_act_low = 0,
> + .vsync_act_low = 0,
> + .pclk_act_falling = 0,

You don't need all the "= 0" assignments above - all uninitialised fields
will be = 0. Also, if you have started aligning assignments, as in .frate
and .has_emb_sync, would be better to align all of them.

> + /* to use codec and preview path simultaneously */
> + .isi_full_mode = 1,
> + .data_width_flags = ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10,
> + /* ISI_MCK is provided by PCK1 */
> + .isi_mck_hz = 25000000,
> +};
> +
> +#else
> +static struct isi_platform_data __initdata isi_data;

Hmm, that doesn't help a lot, does it? Either do not allocate isi_data if
ISI is not selected in .config, or just remove the "#if" completely.

> +#endif
> +
> +/*
> + * soc-camera OV2640
> + */
> +#if defined(CONFIG_SOC_CAMERA_OV2640)

... || defined(CONFIG_SOC_CAMERA_OV2640_MODULE)

> +static unsigned long isi_camera_query_bus_param(struct soc_camera_link *link)
> +{
> + /* ISI board for ek using default 8-bits connection */
> + return SOCAM_DATAWIDTH_8;
> +}
> +
> +static int i2c_camera_power(struct device *dev, int on)
> +{
> + /* enable or disable the camera */
> + pr_debug("%s: %s the camera\n", __func__, on ? "ENABLE" : "DISABLE");
> + at91_set_gpio_output(AT91_PIN_PD13, on ? 0 : 1);

maybe just

at91_set_gpio_output(AT91_PIN_PD13, !on);

> +
> + if (!on)
> + goto out;
> +
> + /* If enabled, give a reset impulse */
> + at91_set_gpio_output(AT91_PIN_PD12, 0);
> + msleep(20);
> + at91_set_gpio_output(AT91_PIN_PD12, 1);
> + msleep(100);
> +
> +out:
> + return 0;
> +}
> +
> +static struct i2c_board_info i2c_camera = {
> + I2C_BOARD_INFO("ov2640", 0x30),
> +};
> +
> +static struct soc_camera_link iclink_ov2640 = {
> + .bus_id = 0,
> + .board_info = &i2c_camera,
> + .i2c_adapter_id = 0,
> + .power = i2c_camera_power,
> + .query_bus_param = isi_camera_query_bus_param,

You could as well make this alignment look better.

> +};
> +
> +static struct platform_device isi_ov2640 = {
> + .name = "soc-camera-pdrv",
> + .id = 0,
> + .dev = {
> + .platform_data = &iclink_ov2640,
> + },
> +};
> +
> +static struct platform_device *devices[] __initdata = {
> + &isi_ov2640,
> +};
> +#else
> +static struct platform_device *devices[] __initdata = {};
> +#endif
>
> /*
> * LCD Controller
> @@ -400,6 +479,10 @@ static void __init ek_board_init(void)
> ek_add_device_nand();
> /* I2C */
> at91_add_device_i2c(0, NULL, 0);
> + /* ISI */
> + platform_add_devices(devices, ARRAY_SIZE(devices));

"devices" is a generic name, but you make it depend on
CONFIG_SOC_CAMERA_OV2640. Why don't you do

static struct platform_device *devices[] __initdata = {
#if defined(CONFIG_SOC_CAMERA_OV2640) || defined(CONFIG_SOC_CAMERA_OV2640_MODULE)
&isi_ov2640,
#endif
};

and move

+ platform_add_devices(devices, ARRAY_SIZE(devices));

out of the /* ISI */ section to a more generic location?

> + at91_add_device_isi(&isi_data);
> +
> /* LCD Controller */
> at91_add_device_lcdc(&ek_lcdc_data);
> /* Touch Screen */
> diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
> index ed544a0..276d63a 100644
> --- a/arch/arm/mach-at91/include/mach/board.h
> +++ b/arch/arm/mach-at91/include/mach/board.h
> @@ -183,7 +183,8 @@ extern void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data);
> extern void __init at91_add_device_ac97(struct ac97c_platform_data *data);
>
> /* ISI */
> -extern void __init at91_add_device_isi(void);
> +struct isi_platform_data;
> +extern void __init at91_add_device_isi(struct isi_platform_data *data);
>
> /* Touchscreen Controller */
> struct at91_tsadcc_data {
> --
> 1.6.3.3

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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Next message: Ram Pai: "[PATCH] Resource: wrong resource window calculation"
Previous message: Simon Kirby: "[3.1-rc6] kmalloc(64) leak from IDE"
In reply to: Josh Wu: "[PATCH v3 2/2] at91: add Atmel ISI and ov2640 support on sam9m10/sam9g45 board."
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]