| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* |
| 3 | * Support PCI IO workaround |
| 4 | * |
| 5 | * (C) Copyright 2007-2008 TOSHIBA CORPORATION |
| 6 | */ |
| 7 | |
| 8 | #ifndef _IO_WORKAROUNDS_H |
| 9 | #define _IO_WORKAROUNDS_H |
| 10 | |
| 11 | #ifdef CONFIG_PPC_IO_WORKAROUNDS |
| 12 | #include <linux/io.h> |
| 13 | #include <asm/pci-bridge.h> |
| 14 | |
| 15 | /* Bus info */ |
| 16 | struct iowa_bus { |
| 17 | struct pci_controller *phb; |
| 18 | struct ppc_pci_io *ops; |
| 19 | void *private; |
| 20 | }; |
| 21 | |
| 22 | void iowa_register_bus(struct pci_controller *, struct ppc_pci_io *, |
| 23 | int (*)(struct iowa_bus *, void *), void *); |
| 24 | struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR); |
| 25 | struct iowa_bus *iowa_pio_find_bus(unsigned long); |
| 26 | |
| 27 | extern struct ppc_pci_io spiderpci_ops; |
| 28 | extern int spiderpci_iowa_init(struct iowa_bus *, void *); |
| 29 | |
| 30 | #define SPIDER_PCI_REG_BASE 0xd000 |
| 31 | #define SPIDER_PCI_REG_SIZE 0x1000 |
| 32 | #define SPIDER_PCI_VCI_CNTL_STAT 0x0110 |
| 33 | #define SPIDER_PCI_DUMMY_READ 0x0810 |
| 34 | #define SPIDER_PCI_DUMMY_READ_BASE 0x0814 |
| 35 | |
| 36 | #endif |
| 37 | |
| 38 | #if defined(CONFIG_PPC_IO_WORKAROUNDS) && defined(CONFIG_PPC_INDIRECT_MMIO) |
| 39 | extern bool io_workaround_inited; |
| 40 | |
| 41 | static inline bool iowa_is_active(void) |
| 42 | { |
| 43 | return unlikely(io_workaround_inited); |
| 44 | } |
| 45 | #else |
| 46 | static inline bool iowa_is_active(void) |
| 47 | { |
| 48 | return false; |
| 49 | } |
| 50 | #endif |
| 51 | |
| 52 | void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size, |
| 53 | pgprot_t prot, void *caller); |
| 54 | |
| 55 | #endif /* _IO_WORKAROUNDS_H */ |