does uclinux1.3 support usb?

It's complicated, and I don't have it working yet myself. Search through this forum, though, for some of my threads -- I've been working on this myself, and wentao gave me some help.

USB might be supported in next release. But you can enable it in 1.3 by yourself, like clansdown did.

thank clansdown and wentao!!

Details are a bit complicated. But here's a bit:

static struct resource sl811_resources = { 
   = {
    .start          = 0x48389D0,
    .end            = 0x48389D3,
    .flags          = IORESOURCE_MEM,
  },
   = {
    .start          = 0x48389D4,
    .end            = 0x48389D7,
    .flags          = IORESOURCE_MEM,
  },
   = {
    .start          = 7,
    .end            = 7,
    .flags          = IORESOURCE_IRQ,
  },
};
static void sm3k_port_power(struct device *dev, int is_on) {
  // see linux/usb_sl811.h
}
static void sm3k_hc_reset(struct device *dev) {
  // see linux/usb_sl811.h
}
struct sl811_platform_data sm3k_sl811 = {
  .potpg = 10,
  .power = 250,
  .port_power = sm3k_port_power,
  .reset = sm3k_hc_reset,
};
static struct platform_device sl811_device = {
  .name           = "sl811-hcd",
  .id             = -1,
  .dev = {
    .platform_data = &sm3k_sl811,
  },
  .num_resources  = ARRAY_SIZE(sl811_resources),
  .resource       = sl811_resources,
};
 
static int __init sl811h_init(void) 
{
        if (usb_disabled())
                return -ENODEV;
        platform_device_register(&sl811_device);
        INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
        return driver_register(&sl811h_driver);
}

Note: the above assumes that you've enabled usb in your kernel config by modifying the line in drivers/usb/Kconfig from

Just to be more explicit about what wentao said earlier (in a different thread), if you want to get usb mass storage support working (usb-storage), you'll need to create a DMA zone in your memory setup. Modify arch/nios2nommu/mm/init.c, toward the bottom of the paging_init() function. I changed the zone creations to look like:

zones_size = (4*1024*1024) >> PAGE_SHIFT;
zones_size = ((end_mem - PAGE_OFFSET) >> PAGE_SHIFT) - zones_size;

Or you can give all sdram to ZONE_DMA and leave the ZONE_NORMAL empty (as long as all you sdram is dma-able).

Clansdown, I am looking forward to your good news!

No, since the microtronix kernel is 2.6.9, you need to grab the sl811-hcd driver from 2.6.10 -- the internal HCD interface changed in the mainline kernel in 2.6.11, so it would be difficult to incorporate the driver from 2.6.11 into a 2.6.9 kernel without ripping out much of the USB core. (that's what the driver maintainer told me.)