Dear Uwe,
could you please give me some advice once more? It seems I'm not able to
make mx2_camera working by myself.
I have tried dma memory allocation in my board file in several ways, but
nothing seems to work. I use Video capture example for v4l2 for testing.
regards
Jan
mx27ipcam_camera_power: 1
mx27ipcam_camera_reset
mx2-camera mx2-camera.0: Camera driver attached to camera 0
mx2-camera mx2-camera.0: dma_alloc_coherent size 614400 failed
mmap error 12, Cannot allocate memory
mx2-camera mx2-camera.0: Camera driver detached from camera 0
mx27ipcam_camera_power: 0
...
static phys_addr_t mx2_camera_base __initdata;
#define MX2_CAMERA_BUF_SIZE SZ_4M
static int __init mx27ipcam_init_camera(void)
{
int dma, ret = -ENOMEM;
struct platform_device *pdev = imx27_alloc_mx2_camera(&mx27ipcam_camera);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
dma = dma_declare_coherent_memory(&pdev->dev,
mx2_camera_base, mx2_camera_base,
MX2_CAMERA_BUF_SIZE,
DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
if (!(dma & DMA_MEMORY_MAP))
goto err;
ret = platform_device_add(pdev);
if (ret)
err:
platform_device_put(pdev);
return ret;
}
static void __init mx27ipcam_init(void)
{
imx27_soc_init();
mxc_gpio_setup_multiple_pins(mx27ipcam_pins, ARRAY_SIZE(mx27ipcam_pins),
"mx27ipcam");
platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
/*imx27_add_mxc_nand(&mx27ipcam_nand_board_info);*/
imx27_add_imx_uart0(NULL);
imx27_add_fec(NULL);
imx27_add_imx2_wdt(NULL);
imx27_add_imx_i2c(0, &mx27ipcam_i2c1_data);
mx27ipcam_init_camera();
}
static void __init mx27ipcam_reserve(void)
{
/* reserve 4 MiB for mx3-camera */
mx2_camera_base = memblock_alloc(MX2_CAMERA_BUF_SIZE,
MX2_CAMERA_BUF_SIZE);
memblock_free(mx2_camera_base, MX2_CAMERA_BUF_SIZE);
memblock_remove(mx2_camera_base, MX2_CAMERA_BUF_SIZE);
}
MACHINE_START(IMX27IPCAM, "Freescale IMX27IPCAM")
/* maintainer: Freescale Semiconductor, Inc. */
.boot_params = MX27_PHYS_OFFSET + 0x100,
.reserve = mx27ipcam_reserve,
.map_io = mx27_map_io,
.init_early = imx27_init_early,
.init_irq = mx27_init_irq,
.timer = &mx27ipcam_timer,
.init_machine = mx27ipcam_init,
MACHINE_END
struct platform_device *__init imx_add_mx2_camera(
const struct imx_mx2_camera_data *data,
const struct mx2_camera_platform_data *pdata)
{
struct resource res[] = {
{
.start = data->iobasecsi,
.end = data->iobasecsi + data->iosizecsi - 1,
.flags = IORESOURCE_MEM,
}, {
.start = data->irqcsi,
.end = data->irqcsi,
.flags = IORESOURCE_IRQ,
}, {
.start = data->iobaseemmaprp,
.end = data->iobaseemmaprp + data->iosizeemmaprp - 1,
.flags = IORESOURCE_MEM,
}, {
.start = data->irqemmaprp,
.end = data->irqemmaprp,
.flags = IORESOURCE_IRQ,
},
};
return imx_add_platform_device_dmamask("mx2-camera", 0,
res, data->iobaseemmaprp ? 4 : 2,
pdata, sizeof(*pdata), DMA_BIT_MASK(32));
}
struct platform_device *__init imx_alloc_mx2_camera(
const struct imx_mx2_camera_data *data,
const struct mx2_camera_platform_data *pdata)
{
struct resource res[] = {
{
.start = data->iobasecsi,
.end = data->iobasecsi + data->iosizecsi - 1,
.flags = IORESOURCE_MEM,
}, {
.start = data->irqcsi,
.end = data->irqcsi,
.flags = IORESOURCE_IRQ,
}, {
.start = data->iobaseemmaprp,
.end = data->iobaseemmaprp + data->iosizeemmaprp - 1,
.flags = IORESOURCE_MEM,
}, {
.start = data->irqemmaprp,
.end = data->irqemmaprp,
.flags = IORESOURCE_IRQ,
},
};
int ret = -ENOMEM;
struct platform_device *pdev;
pdev = platform_device_alloc("mx2-camera", 0);
if (!pdev)
goto err;
pdev->dev.dma_mask = kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
if (!pdev->dev.dma_mask)
goto err;
*pdev->dev.dma_mask = DMA_BIT_MASK(32);
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
if (ret)
goto err;
if (pdata) {
ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
if (ret) {
err:
kfree(pdev->dev.dma_mask);
platform_device_put(pdev);
return ERR_PTR(-ENODEV);
}
}
return pdev;
}
Dne Fri, 29 Jul 2011 13:57:32 +0200 Uwe Kleine-König
<u.kleine-koenig@xxxxxxxxxxxxxx> napsal(a):
Hello Jan,
On Fri, Jul 29, 2011 at 12:14:09PM +0200, Jan Pohanka wrote:
which repository should I search
90026c8c823bff54172eab33a5e7fcecfd3df635 in? I have not found it in
git.pengutronix.de/git/imx/linux-2.6.git nor in vanilla sources.
Seems my copy'n'paste foo isn't optimal. Commit
dca7c0b4293a06d1ed9387e729a4882896abccc2 is the relevant, it's in
vanilla.
http://git.kernel.org/linus/dca7c0b4293a06d1ed9387e729a4882896abccc2
Best regards
Uwe
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