On Thu, May 26, 2016 at 4:05 PM, Martin Townsend
<mtownsend1973@xxxxxxxxx> wrote:
> Hi,
>
> I'm currently trying to get the USB Host working on the SH7760. I
> tried the platform driver to start with and get the following error on
> boot:
> [ 3.600000] usb 1-1: new full-speed USB device number 2 using ohci-platform
> [ 3.872000] ohci-platform ohci-platform: frame counter not updating; disabled
> [ 3.872000] ohci-platform ohci-platform: HC died; cleaning up
>
> So I dug a bit further and see that the SH7760 driver in the 2.6
> kernel makes use of the 8KB shared memory for HCCA and ED/TD buffers.
> After looking through the code for the 4.1 Kernel I am currently
> trying to port to I think I need to write my own platform driver that
> calls dma_declare_coherent_memory so that the OHCI driver uses this
> 8KB shared memory. Then set HCD_LOCAL_MEM in the hc_driver flags to
> ensure that it uses dma_alloc_coherent. In other words copy what the
> ohci-sm501.c file is doing. I just wanted to confirm that this is
> what I should be doing or is there a better generic way of telling the
> OHCI driver to use this 8KB shared memory.
>
I tried hacking in the relevant code straight into the OHCI platform driver
res_mem = platform_get_resource(dev, IORESOURCE_MEM, 1);
if (res_mem == NULL) {
dev_err(&dev->dev, "no resource definition for memory\n");
err = -ENOENT;
goto err_power;
}
if (!request_mem_region(res_mem->start, resource_size(res_mem),
dev->name)) {
dev_err(&dev->dev, "request_mem_region failed\n");
err = -EBUSY;
goto err_power;
}
/*
* Use SH7760 Shared Memory
*/
if (!dma_declare_coherent_memory(&dev->dev, res_mem->start,
res_mem->start - res_mem->parent->start,
resource_size(res_mem),
DMA_MEMORY_MAP |
DMA_MEMORY_EXCLUSIVE)) {
dev_err(&dev->dev, "cannot declare coherent memory\n");
err = -ENXIO;
goto err_power;
}
and setting the HCD_MEMORY_LOCAL flag in the HC driver.
and I get the following error
[ 1.040000] Found resource sh7760-usb-irq
[ 1.060000] Found resource sh7760-usb-shared-memory
[ 1.060000] Found resource sh7760-usb-io-memory
[ 1.130000] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[ 1.130000] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[ 1.130000] usb usb1: Product: Generic Platform OHCI controller
[ 1.130000] usb usb1: Manufacturer: Linux 4.1.17-yocto-standard ohci_hcd
[ 1.130000] usb usb1: SerialNumber: ohci-platform
[ 1.130000] device: 'usb1': device_add
[ 1.130000] bus: 'usb': add device usb1
[ 1.130000] bus: 'usb': driver_probe_device: matched device usb1
with driver usb
[ 1.130000] bus: 'usb': really_probe: probing driver usb with device usb1
[ 1.130000] bus: 'usb': add device 1-0:1.0
[ 1.130000] bus: 'usb': driver_probe_device: matched device 1-0:1.0
with driver hub
[ 1.130000] bus: 'usb': really_probe: probing driver hub with device 1-0:1.0
[ 1.130000] device: 'usb1-port1': device_add
[ 1.130000] device: 'usb1-port2': device_add
[ 1.130000] bus: 'usb': really_probe: bound device 1-0:1.0 to driver hub
[ 1.130000] driver: 'usb': driver_bound: bound to device 'usb1'
[ 1.130000] bus: 'usb': really_probe: bound device usb1 to driver usb
[ 1.140000] bus: 'usb': add driver usbhid
[ 1.140000] usbcore: registered new interface driver usbhid
[ 1.140000] usbhid: USB HID core driver
[ 1.510000] usb 1-1: new full-speed USB device number 2 using ohci-platform
[ 1.690000] usb 1-1: device descriptor read/64, error -12
[ 1.980000] usb 1-1: device descriptor read/64, error -12
[ 2.270000] usb 1-1: new full-speed USB device number 3 using ohci-platform
[ 2.450000] usb 1-1: device descriptor read/64, error -12
[ 2.740000] usb 1-1: device descriptor read/64, error -12
[ 3.030000] usb 1-1: new full-speed USB device number 4 using ohci-platform
[ 3.450000] usb 1-1: device not accepting address 4, error -12
[ 3.630000] usb 1-1: new full-speed USB device number 5 using ohci-platform
[ 4.050000] usb 1-1: device not accepting address 5, error -12
[ 4.050000] usb usb1-port1: unable to enumerate USB device
Here's the board support definitions
/* No power control needed so a blank platform data */
static struct usb_ohci_pdata usb_ohci_pdata;
static u64 usb_ohci_dma_mask = 0xffffffff;
static struct resource sh7760_usb_resources[] = {
DEFINE_RES_MEM_NAMED(SH7760_USB_BASE, SH7760_USB_IOLEN,
"sh7760-usb-io-memory"),
DEFINE_RES_MEM_NAMED(SH7760_USB_SHARED_MEM_BASE_ADDR,
SH7760_USB_SHARED_MEM_LEN,
"sh7760-usb-shared-memory"),
DEFINE_RES_IRQ_NAMED(USB_IRQ, "sh7760-usb-irq"),
};
static struct platform_device sh7760_usb_host_device = {
.name = "ohci-platform",
.id = -1,
.dev = {
.dma_mask = &usb_ohci_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &usb_ohci_pdata,
},
.num_resources = ARRAY_SIZE(sh7760_usb_resources),
.resource = sh7760_usb_resources,
};
/proc/iomem is showing
fe340000-fe340ffe : sh7760-usb-io-memory
fe340000-fe340ffe : sh7760-usb-io-memory
fe341000-fe342fff : sh7760-usb-shared-memory
fe341000-fe342fff : ohci-platform
which looks good. Anyone have an idea as to what's wrong or what the
error messages mean. I have nothing plugged into the USB ports. Also
any ideas on where to start with debugging this would be appreciated.
- Martin
> Thanks in advance,
> Martin.
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