1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* Low-Level PCI Support for the SH7780
*
* Dustin McIntire (dustin@sensoria.com)
* Derived from arch/i386/kernel/pci-*.c which bore the message:
* (c) 1999--2000 Martin Mares <mj@ucw.cz>
*
* Ported to the new API by Paul Mundt <lethal@linux-sh.org>
* With cleanup by Paul van Gool <pvangool@mimotech.com>
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
*/
#undef DEBUG
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include "pci-sh4.h"
/*
* Initialization. Try all known PCI access methods. Note that we support
* using both PCI BIOS and direct access: in such cases, we use I/O ports
* to access config space.
*
* Note that the platform specific initialization (BSC registers, and memory
* space mapping) will be called via the platform defined function
* pcibios_init_platform().
*/
int __init sh7780_pci_init(struct pci_channel *chan)
{
unsigned int id;
const char *type = NULL;
int ret;
printk(KERN_NOTICE "PCI: Starting intialization.\n");
chan->reg_base = 0xfe040000;
chan->io_base = 0xfe200000;
/* Enable CPU access to the PCIC registers. */
__raw_writel(PCIECR_ENBL, PCIECR);
id = __raw_readw(chan->reg_base + SH7780_PCIVID);
if (id != SH7780_VENDOR_ID) {
printk(KERN_ERR "PCI: Unknown vendor ID 0x%04x.\n", id);
return -ENODEV;
}
id = __raw_readw(chan->reg_base + SH7780_PCIDID);
type = (id == SH7763_DEVICE_ID) ? "SH7763" :
(id == SH7780_DEVICE_ID) ? "SH7780" :
(id == SH7781_DEVICE_ID) ? "SH7781" :
(id == SH7785_DEVICE_ID) ? "SH7785" :
NULL;
if (unlikely(!type)) {
printk(KERN_ERR "PCI: Found an unsupported Renesas host "
"controller, device id 0x%04x.\n", id);
return -EINVAL;
}
printk(KERN_NOTICE "PCI: Found a Renesas %s host "
"controller, revision %d.\n", type,
__raw_readb(chan->reg_base + SH7780_PCIRID));
if ((ret = sh4_pci_check_direct(chan)) != 0)
return ret;
return pcibios_init_platform();
}
int __init sh7780_pcic_init(struct pci_channel *chan,
struct sh4_pci_address_map *map)
{
u32 word;
pci_write_reg(chan, PCI_CLASS_BRIDGE_HOST >> 8, SH7780_PCIBCC);
pci_write_reg(chan, PCI_CLASS_BRIDGE_HOST & 0xff, SH7780_PCISUB);
/* set the command/status bits to:
* Wait Cycle Control + Parity Enable + Bus Master +
* Mem space enable
*/
pci_write_reg(chan, 0x00000046, SH7780_PCICMD);
/* Set IO and Mem windows to local address
* Make PCI and local address the same for easy 1 to 1 mapping
*/
pci_write_reg(chan, map->window0.size - 0xfffff, SH4_PCILSR0);
pci_write_reg(chan, map->window1.size - 0xfffff, SH4_PCILSR1);
/* Set the values on window 0 PCI config registers */
pci_write_reg(chan, map->window0.base, SH4_PCILAR0);
pci_write_reg(chan, map->window0.base, SH7780_PCIMBAR0);
/* Set the values on window 1 PCI config registers */
pci_write_reg(chan, map->window1.base, SH4_PCILAR1);
pci_write_reg(chan, map->window1.base, SH7780_PCIMBAR1);
/* Apply any last-minute PCIC fixups */
pci_fixup_pcic(chan);
/* SH7780 init done, set central function init complete */
/* use round robin mode to stop a device starving/overruning */
word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_FTO;
pci_write_reg(chan, word, SH4_PCICR);
return 0;
}
|
