1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2014 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 /*
8 * IO space access commands.
9 */
10
11 #include <common.h>
12 #include <command.h>
13 #include <dm.h>
14 #include <asm/io.h>
15
pci_map_physmem(phys_addr_t paddr,unsigned long * lenp,struct udevice ** devp,void ** ptrp)16 int pci_map_physmem(phys_addr_t paddr, unsigned long *lenp,
17 struct udevice **devp, void **ptrp)
18 {
19 struct udevice *dev;
20 int ret;
21
22 *ptrp = 0;
23 for (uclass_first_device(UCLASS_PCI_EMUL, &dev);
24 dev;
25 uclass_next_device(&dev)) {
26 struct dm_pci_emul_ops *ops = pci_get_emul_ops(dev);
27
28 if (!ops || !ops->map_physmem)
29 continue;
30 ret = (ops->map_physmem)(dev, paddr, lenp, ptrp);
31 if (ret)
32 continue;
33 *devp = dev;
34 return 0;
35 }
36
37 debug("%s: failed: addr=%pap\n", __func__, &paddr);
38 return -ENOSYS;
39 }
40
pci_unmap_physmem(const void * vaddr,unsigned long len,struct udevice * dev)41 int pci_unmap_physmem(const void *vaddr, unsigned long len,
42 struct udevice *dev)
43 {
44 struct dm_pci_emul_ops *ops = pci_get_emul_ops(dev);
45
46 if (!ops || !ops->unmap_physmem)
47 return -ENOSYS;
48 return (ops->unmap_physmem)(dev, vaddr, len);
49 }
50
pci_io_read(unsigned int addr,ulong * valuep,pci_size_t size)51 static int pci_io_read(unsigned int addr, ulong *valuep, pci_size_t size)
52 {
53 struct udevice *dev;
54 int ret;
55
56 *valuep = pci_get_ff(size);
57 for (uclass_first_device(UCLASS_PCI_EMUL, &dev);
58 dev;
59 uclass_next_device(&dev)) {
60 struct dm_pci_emul_ops *ops = pci_get_emul_ops(dev);
61
62 if (ops && ops->read_io) {
63 ret = (ops->read_io)(dev, addr, valuep, size);
64 if (!ret)
65 return 0;
66 }
67 }
68
69 debug("%s: failed: addr=%x\n", __func__, addr);
70 return -ENOSYS;
71 }
72
pci_io_write(unsigned int addr,ulong value,pci_size_t size)73 static int pci_io_write(unsigned int addr, ulong value, pci_size_t size)
74 {
75 struct udevice *dev;
76 int ret;
77
78 for (uclass_first_device(UCLASS_PCI_EMUL, &dev);
79 dev;
80 uclass_next_device(&dev)) {
81 struct dm_pci_emul_ops *ops = pci_get_emul_ops(dev);
82
83 if (ops && ops->write_io) {
84 ret = (ops->write_io)(dev, addr, value, size);
85 if (!ret)
86 return 0;
87 }
88 }
89
90 debug("%s: failed: addr=%x, value=%lx\n", __func__, addr, value);
91 return -ENOSYS;
92 }
93
_inl(unsigned int addr)94 int _inl(unsigned int addr)
95 {
96 unsigned long value;
97 int ret;
98
99 ret = pci_io_read(addr, &value, PCI_SIZE_32);
100
101 return ret ? 0 : value;
102 }
103
_inw(unsigned int addr)104 int _inw(unsigned int addr)
105 {
106 unsigned long value;
107 int ret;
108
109 ret = pci_io_read(addr, &value, PCI_SIZE_16);
110
111 return ret ? 0 : value;
112 }
113
_inb(unsigned int addr)114 int _inb(unsigned int addr)
115 {
116 unsigned long value;
117 int ret;
118
119 ret = pci_io_read(addr, &value, PCI_SIZE_8);
120
121 return ret ? 0 : value;
122 }
123
_outl(unsigned int value,unsigned int addr)124 void _outl(unsigned int value, unsigned int addr)
125 {
126 pci_io_write(addr, value, PCI_SIZE_32);
127 }
128
_outw(unsigned int value,unsigned int addr)129 void _outw(unsigned int value, unsigned int addr)
130 {
131 pci_io_write(addr, value, PCI_SIZE_16);
132 }
133
_outb(unsigned int value,unsigned int addr)134 void _outb(unsigned int value, unsigned int addr)
135 {
136 pci_io_write(addr, value, PCI_SIZE_8);
137 }
138