2 * Copyright (C) 2013 Imagination Technologies
3 * Author: Paul Burton <paul.burton@mips.com>
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <pci_msc01.h>
14 #define PCI_ACCESS_READ 0
15 #define PCI_ACCESS_WRITE 1
17 struct msc01_pci_controller {
18 struct pci_controller hose;
22 static inline struct msc01_pci_controller *
23 hose_to_msc01(struct pci_controller *hose)
25 return container_of(hose, struct msc01_pci_controller, hose);
28 static int msc01_config_access(struct msc01_pci_controller *msc01,
29 unsigned char access_type, pci_dev_t bdf,
32 const u32 aborts = MSC01_PCI_INTSTAT_MA_MSK | MSC01_PCI_INTSTAT_TA_MSK;
33 void *intstat = msc01->base + MSC01_PCI_INTSTAT_OFS;
34 void *cfgdata = msc01->base + MSC01_PCI_CFGDATA_OFS;
35 unsigned int bus = PCI_BUS(bdf);
36 unsigned int dev = PCI_DEV(bdf);
37 unsigned int devfn = PCI_DEV(bdf) << 3 | PCI_FUNC(bdf);
39 /* clear abort status */
40 __raw_writel(aborts, intstat);
43 __raw_writel((bus << MSC01_PCI_CFGADDR_BNUM_SHF) |
44 (dev << MSC01_PCI_CFGADDR_DNUM_SHF) |
45 (devfn << MSC01_PCI_CFGADDR_FNUM_SHF) |
46 ((where / 4) << MSC01_PCI_CFGADDR_RNUM_SHF),
47 msc01->base + MSC01_PCI_CFGADDR_OFS);
50 if (access_type == PCI_ACCESS_WRITE)
51 __raw_writel(*data, cfgdata);
53 *data = __raw_readl(cfgdata);
55 /* check for aborts */
56 if (__raw_readl(intstat) & aborts) {
57 /* clear abort status */
58 __raw_writel(aborts, intstat);
65 static int msc01_read_config_dword(struct pci_controller *hose, pci_dev_t dev,
66 int where, u32 *value)
68 struct msc01_pci_controller *msc01 = hose_to_msc01(hose);
71 return msc01_config_access(msc01, PCI_ACCESS_READ, dev, where, value);
74 static int msc01_write_config_dword(struct pci_controller *hose, pci_dev_t dev,
77 struct msc01_pci_controller *gt = hose_to_msc01(hose);
80 return msc01_config_access(gt, PCI_ACCESS_WRITE, dev, where, &data);
83 void msc01_pci_init(void *base, unsigned long sys_bus, unsigned long sys_phys,
84 unsigned long sys_size, unsigned long mem_bus,
85 unsigned long mem_phys, unsigned long mem_size,
86 unsigned long io_bus, unsigned long io_phys,
87 unsigned long io_size)
89 static struct msc01_pci_controller global_msc01;
90 struct msc01_pci_controller *msc01;
91 struct pci_controller *hose;
93 msc01 = &global_msc01;
98 hose->first_busno = 0;
101 /* System memory space */
102 pci_set_region(&hose->regions[0], sys_bus, sys_phys, sys_size,
103 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
105 /* PCI memory space */
106 pci_set_region(&hose->regions[1], mem_bus, mem_phys, mem_size,
110 pci_set_region(&hose->regions[2], io_bus, io_phys, io_size,
113 hose->region_count = 3;
116 pci_hose_read_config_byte_via_dword,
117 pci_hose_read_config_word_via_dword,
118 msc01_read_config_dword,
119 pci_hose_write_config_byte_via_dword,
120 pci_hose_write_config_word_via_dword,
121 msc01_write_config_dword);
123 pci_register_hose(hose);
124 hose->last_busno = pci_hose_scan(hose);