projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 LT |
2 | /* |
| 3 | * linux/arch/arm/mach-footbridge/cats-pci.c | |
| 4 | * | |
| 5 | * PCI bios-type initialisation for PCI machines | |
| 6 | * | |
| 7 | * Bits taken from various places. | |
| 8 | */ | |
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/pci.h> | |
| 11 | #include <linux/init.h> | |
| 12 | ||
| 13 | #include <asm/irq.h> | |
| 14 | #include <asm/mach/pci.h> | |
| 15 | #include <asm/mach-types.h> | |
| 16 | ||
| 17 | /* cats host-specific stuff */ | |
| 18 | static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 }; | |
| 19 | ||
| 66e9279a RK |
20 | static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin) |
| 21 | { | |
| 22 | return 0; | |
| 23 | } | |
| 24 | ||
| d5341942 | 25 | static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 1da177e4 | 26 | { |
| e38d523f BD |
27 | if (dev->irq >= 255) |
| 28 | return -1; /* not a valid interrupt. */ | |
| 29 | ||
| 1da177e4 LT |
30 | if (dev->irq >= 128) |
| 31 | return dev->irq & 0x1f; | |
| 32 | ||
| 33 | if (dev->irq >= 1 && dev->irq <= 4) | |
| 34 | return irqmap_cats[dev->irq - 1]; | |
| 35 | ||
| 36 | if (dev->irq != 0) | |
| 37 | printk("PCI: device %02x:%02x has unknown irq line %x\n", | |
| 38 | dev->bus->number, dev->devfn, dev->irq); | |
| 39 | ||
| 40 | return -1; | |
| 41 | } | |
| 42 | ||
| 43 | /* | |
| 44 | * why not the standard PCI swizzle? does this prevent 4-port tulip | |
| 45 | * cards being used (ie, pci-pci bridge based cards)? | |
| 46 | */ | |
| 47 | static struct hw_pci cats_pci __initdata = { | |
| 66e9279a | 48 | .swizzle = cats_no_swizzle, |
| 1da177e4 LT |
49 | .map_irq = cats_map_irq, |
| 50 | .nr_controllers = 1, | |
| c23bfc38 | 51 | .ops = &dc21285_ops, |
| 1da177e4 | 52 | .setup = dc21285_setup, |
| 1da177e4 LT |
53 | .preinit = dc21285_preinit, |
| 54 | .postinit = dc21285_postinit, | |
| 55 | }; | |
| 56 | ||
| cdea4606 | 57 | static int __init cats_pci_init(void) |
| 1da177e4 LT |
58 | { |
| 59 | if (machine_is_cats()) | |
| 60 | pci_common_init(&cats_pci); | |
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 64 | subsys_initcall(cats_pci_init); |