Force smbus communication, disable QCIF mode, and set the correct
clock speed on the OLPC XO-1.
Signed-off-by: Daniel Drake <dsd@xxxxxxxxxx>
---
drivers/media/video/cafe_ccic.c | 33 +++++++++++++++++++++++++++++++--
1 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index b4f5b3b..4378597 100644
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/dmi.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/i2c.h>
@@ -46,6 +47,7 @@
#include <asm/uaccess.h>
#include <asm/io.h>
+#include "ov7670.h"
#include "cafe_ccic-regs.h"
#define CAFE_VERSION 0x000002
@@ -1974,11 +1976,33 @@ static irqreturn_t cafe_irq(int irq, void *data)
* PCI interface stuff.
*/
+static const struct dmi_system_id olpc_xo1_dmi[] = {
+ {
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "1"),
+ },
+ },
+ { }
+};
+
static int cafe_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
int ret;
struct cafe_camera *cam;
+ struct ov7670_config sensor_cfg = {
+ /* This controller only does SMBUS */
+ .use_smbus = true,
+
+ /*
+ * Exclude QCIF mode, because it only captures a tiny portion
+ * of the sensor FOV
+ */
+ .min_width = 320,
+ .min_height = 240,
+ };
/*
* Start putting together one of our big camera structures.
@@ -2036,13 +2060,18 @@ static int cafe_pci_probe(struct pci_dev *pdev,
if (ret)
goto out_freeirq;
+ /* Apply XO-1 clock speed */
+ if (dmi_check_system(olpc_xo1_dmi))
+ sensor_cfg.clock_speed = 45;
+
cam->sensor_addr = 0x42;
- cam->sensor = v4l2_i2c_new_subdev(&cam->v4l2_dev, &cam->i2c_adapter,
- "ov7670", "ov7670", cam->sensor_addr, NULL);
+ cam->sensor = v4l2_i2c_new_subdev_cfg(&cam->v4l2_dev, &cam->i2c_adapter,
+ "ov7670", "ov7670", 0, &sensor_cfg, cam->sensor_addr, NULL);
if (cam->sensor == NULL) {
ret = -ENODEV;
goto out_smbus;
}
+
ret = cafe_cam_init(cam);
if (ret)
goto out_smbus;
--
1.7.2.3
--
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