Linux Alpha - SX164 Floppy

Floppy doesn not work

When accessing the floppy just nothing happens
This is known for kernel later than 2.0.33 and older than 2.1.121, in fact the DMA controller used is not initialized correctly.
Either use a newer kernel or try to patch your favourite kernel, look at the appended really short patches.

For 2.0.* kernels:

diff

For 2.1.* kernels:

linux/arch/alpha/kernel/sys_sx164.c:

static void
sx164_init_irq(void)
{
        outb(0, DMA1_RESET_REG);
        outb(0, DMA2_RESET_REG);
+       outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
+       outb(0, DMA2_MASK_REG);

        if (alpha_using_srm) {
                alpha_mv.update_irq_hw = sx164_srm_update_irq_hw;