summaryrefslogtreecommitdiff
path: root/src/mainboard/olpc/btest/mainboard.c
blob: 35826cb24d0c364ec91e9eb05634025a6d22bc25 (plain)
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
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <arch/io.h>
#include <pc80/mc146818rtc.h>
#include "chip.h"
#include "../southbridge/amd/cs5536/cs5536_smbus2.h"

/* Borrowed from mc146818rtc.c */

#define CMOS_READ(addr) ({ \
		outb((addr),RTC_PORT(0)); \
		inb(RTC_PORT(1)); \
		})

#define CMOS_WRITE(val, addr) ({ \
		outb((addr),RTC_PORT(0)); \
		outb((val),RTC_PORT(1)); \
		})

static void write_bit(unsigned char val) {

	unsigned char byte = CMOS_READ(440 / 8);

	/* Don't change it if its already set */

	if ((byte & 1) == (val & 1))
		return;

	byte &= ~1;
	byte |= val & 1;
	CMOS_WRITE(val, 440/8);
}

static unsigned short _getsmbusbase(void) {
	unsigned devfn = PCI_DEVFN(0xf, 0);
	device_t dev = dev_find_slot(0x0, devfn);
	unsigned long addr = pci_read_config32(dev, PCI_BASE_ADDRESS_0);

	return (unsigned short) (addr & ~1);
}

static void init_dcon(void) {

  int ret = 1;
  unsigned short rev = 0;
  unsigned short iobase = _getsmbusbase();

  printk_debug("CHECKING FOR DCON (%x)\n", iobase);

  /* Get the IO base for the SMBUS */

  rev = do_smbus_read_word(iobase, 0x0D << 1, 0x00);

  if (rev & 0xDC00) {
	printk_debug("DCON FOUND - REV %x\n", rev);

	/* Enable the DCON */
	ret = do_smbus_write_word(iobase, 0x0D << 1, 0x01, 0x0069);
	if (ret != 0)
		printk_debug("DCON ENABLE FAILED\n", ret);
  }
  else
	  printk_debug("DCON NOT FOUND (%x)\n", rev);

  write_bit(rev > 0 ? 1 : 0);
}

static void init(struct device *dev) {
/*
	unsigned bus = 0;
	unsigned devfn = PCI_DEVFN(0xf, 4);
	device_t usb = NULL;
	unsigned char usbirq = 0xa;
*/

	printk_debug("OLPC BTEST ENTER %s\n", __FUNCTION__);

#if 0
	/* I can't think of any reason NOT to just set this. If it turns out we want this to be
	  * conditional we can make it a config variable later.
	  */

	printk_debug("%s (%x,%x)SET USB PCI interrupt line to %d\n", 
		__FUNCTION__, bus, devfn, usbirq);
	usb = dev_find_slot(bus, devfn);
	if (! usb){
		printk_err("Could not find USB\n");
	} else {
		pci_write_config8(usb, PCI_INTERRUPT_LINE, usbirq);
	}
#endif

	init_dcon();
	printk_debug("OLPC BTEST EXIT %s\n", __FUNCTION__);
}

static void enable_dev(struct device *dev)
{
        dev->ops->init = init;
}

struct chip_operations mainboard_olpc_btest_ops = {
	CHIP_NAME("olpc btest mainboard ")
        .enable_dev = enable_dev,

};