[PATCH 6/6] mx31moboard: camera support
Valentin Longchamp
valentin.longchamp at epfl.ch
Tue Nov 3 12:09:51 EST 2009
We have two mt9t031 cameras that have a muxed bus on the robot.
Only one is currently initialized because of limitations in
soc_camera that should be removed later.
Signed-off-by: Valentin Longchamp <valentin.longchamp at epfl.ch>
---
arch/arm/mach-mx3/mx31moboard-marxbot.c | 86 ++++++++++++++++++++++++++++++-
arch/arm/mach-mx3/mx31moboard.c | 36 +++++++++++++
2 files changed, 121 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-mx3/mx31moboard-marxbot.c b/arch/arm/mach-mx3/mx31moboard-marxbot.c
index 6b06faf..e4e344e 100644
--- a/arch/arm/mach-mx3/mx31moboard-marxbot.c
+++ b/arch/arm/mach-mx3/mx31moboard-marxbot.c
@@ -16,9 +16,11 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/types.h>
@@ -28,6 +30,8 @@
#include <mach/iomux-mx3.h>
#include <mach/mmc.h>
+#include <media/soc_camera.h>
+
#include "devices.h"
static unsigned int marxbot_pins[] = {
@@ -37,7 +41,6 @@ static unsigned int marxbot_pins[] = {
MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
/* CSI */
- MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
@@ -45,6 +48,7 @@ static unsigned int marxbot_pins[] = {
MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
+ MX31_PIN_CSI_D4__GPIO3_4, MX31_PIN_CSI_D5__GPIO3_5,
MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
MX31_PIN_TXD2__GPIO1_28,
/* dsPIC resets */
@@ -122,6 +126,83 @@ static void dspics_resets_init(void)
}
}
+#define TURRETCAM_POWER IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
+#define BASECAM_POWER IOMUX_TO_GPIO(MX31_PIN_CSI_D5)
+#define TURRETCAM_RST_B IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
+#define BASECAM_RST_B IOMUX_TO_GPIO(MX31_PIN_CSI_D4)
+#define CAM_CHOICE IOMUX_TO_GPIO(MX31_PIN_TXD2)
+
+static int marxbot_basecam_power(struct device *dev, int on)
+{
+ gpio_set_value(BASECAM_POWER, !on);
+ return 0;
+}
+
+static int marxbot_basecam_reset(struct device *dev)
+{
+ gpio_set_value(BASECAM_RST_B, 0);
+ udelay(100);
+ gpio_set_value(BASECAM_RST_B, 1);
+ return 0;
+}
+
+static struct i2c_board_info marxbot_i2c_devices[] = {
+ {
+ I2C_BOARD_INFO("mt9t031", 0x5d),
+ },
+};
+
+static struct soc_camera_link base_iclink = {
+ .bus_id = 0, /* Must match with the camera ID */
+ .power = marxbot_basecam_power,
+ .reset = marxbot_basecam_reset,
+ .board_info = &marxbot_i2c_devices[0],
+ .i2c_adapter_id = 0,
+ .module_name = "mt9t031",
+};
+
+static struct platform_device marxbot_camera[] = {
+ {
+ .name = "soc-camera-pdrv",
+ .id = 0,
+ .dev = {
+ .platform_data = &base_iclink,
+ },
+ },
+};
+
+static struct platform_device *marxbot_cameras[] __initdata = {
+ &marxbot_camera[0],
+};
+
+static int __init marxbot_cam_init(void)
+{
+ int ret = gpio_request(CAM_CHOICE, "cam-choice");
+ if (ret)
+ return ret;
+ gpio_direction_output(CAM_CHOICE, 1);
+
+ ret = gpio_request(BASECAM_RST_B, "basecam-reset");
+ if (ret)
+ return ret;
+ gpio_direction_output(BASECAM_RST_B, 1);
+ ret = gpio_request(BASECAM_POWER, "basecam-standby");
+ if (ret)
+ return ret;
+ gpio_direction_output(BASECAM_POWER, 0);
+
+ ret = gpio_request(TURRETCAM_RST_B, "turretcam-reset");
+ if (ret)
+ return ret;
+ gpio_direction_output(TURRETCAM_RST_B, 1);
+ ret = gpio_request(TURRETCAM_POWER, "turretcam-standby");
+ if (ret)
+ return ret;
+ gpio_direction_output(TURRETCAM_POWER, 0);
+
+ return 0;
+}
+
/*
* system init for baseboard usage. Will be called by mx31moboard init.
*/
@@ -136,6 +217,9 @@ void __init mx31moboard_marxbot_init(void)
mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
+ marxbot_cam_init();
+ platform_add_devices(marxbot_cameras, ARRAY_SIZE(marxbot_cameras));
+
/* battery present pin */
gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
diff --git a/arch/arm/mach-mx3/mx31moboard.c b/arch/arm/mach-mx3/mx31moboard.c
index 2f95dcd..b167f13 100644
--- a/arch/arm/mach-mx3/mx31moboard.c
+++ b/arch/arm/mach-mx3/mx31moboard.c
@@ -17,6 +17,7 @@
*/
#include <linux/delay.h>
+#include <linux/dma-mapping.h>
#include <linux/fsl_devices.h>
#include <linux/gpio.h>
#include <linux/init.h>
@@ -403,6 +404,39 @@ static struct platform_device *devices[] __initdata = {
&mx31moboard_leds_device,
};
+static struct mx3_camera_pdata camera_pdata = {
+ .dma_dev = &mx3_ipu.dev,
+ .flags = MX3_CAMERA_DATAWIDTH_8 | MX3_CAMERA_DATAWIDTH_10,
+ .mclk_10khz = 4800,
+};
+
+#define CAMERA_BUF_SIZE (4*1024*1024)
+
+static int __init mx31moboard_cam_alloc_dma(const size_t buf_size)
+{
+ dma_addr_t dma_handle;
+ void *buf;
+ int dma;
+
+ if (buf_size < 2 * 1024 * 1024)
+ return -EINVAL;
+
+ buf = dma_alloc_coherent(NULL, buf_size, &dma_handle, GFP_KERNEL);
+ if (!buf) {
+ pr_err("%s: cannot allocate camera buffer-memory\n", __func__);
+ return -ENOMEM;
+ }
+
+ memset(buf, 0, buf_size);
+
+ dma = dma_declare_coherent_memory(&mx3_camera.dev,
+ dma_handle, dma_handle, buf_size,
+ DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
+
+ /* The way we call dma_declare_coherent_memory only a malloc can fail */
+ return dma & DMA_MEMORY_MAP ? 0 : -ENOMEM;
+}
+
static int mx31moboard_baseboard;
core_param(mx31moboard_baseboard, mx31moboard_baseboard, int, 0444);
@@ -436,6 +470,8 @@ static void __init mxc_board_init(void)
mxc_register_device(&mxcsdhc_device0, &sdhc1_pdata);
mxc_register_device(&mx3_ipu, &mx3_ipu_data);
+ if (!mx31moboard_cam_alloc_dma(CAMERA_BUF_SIZE))
+ mxc_register_device(&mx3_camera, &camera_pdata);
usb_xcvr_reset();
--
1.6.3.3
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