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powerpc: Update currituck pci/usb fixup for new board revision

Telusuri Sumber 
The currituck board uses a different IRQ for the pci usb host
controller depending on the board revision. This patch adds support
for newer board revisions by retrieving the board revision from the
FPGA and mapping the appropriate IRQ.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Acked-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Alistair Popple
2013-05-09 10:42:13 +10:00
committed by Benjamin Herrenschmidt
orang tua 70a54a4fae
melakukan ab9a4183fd
2 mengubah file dengan 42 tambahan dan 2 penghapusan
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39
arch/powerpc/platforms/44x/currituck.c
Melihat File

@@ -176,13 +176,48 @@ static int __init ppc47x_probe(void)
return 1;
}
static int board_rev = -1;
static int __init ppc47x_get_board_rev(void)
{
u8 fpga_reg0;
void *fpga;
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
if (!np)
goto fail;
fpga = of_iomap(np, 0);
of_node_put(np);
if (!fpga)
goto fail;
fpga_reg0 = ioread8(fpga);
board_rev = fpga_reg0 & 0x03;
pr_info("%s: Found board revision %d\n", __func__, board_rev);
iounmap(fpga);
return 0;
fail:
pr_info("%s: Unable to find board revision\n", __func__);
return 0;
}
machine_arch_initcall(ppc47x, ppc47x_get_board_rev);
/* Use USB controller should have been hardware swizzled but it wasn't :( */
static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
{
if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
dev->device == 0x00e0)) {
dev->irq = irq_create_mapping(NULL, 47);
pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq);
if (board_rev == 0) {
dev->irq = irq_create_mapping(NULL, 47);
pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
} else if (board_rev == 2) {
dev->irq = irq_create_mapping(NULL, 49);
pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
} else {
pr_alert("%s: Unknown board revision\n", __func__);
}
}
}