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Jaya Kumara2f7c352005-05-01 08:58:49 -07001/*
Jaya Kumara2f7c352005-05-01 08:58:49 -07002 * This is a good place to put board specific reboot fixups.
3 *
4 * List of supported fixups:
5 * geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz>
Andres Salomon95069f82007-07-06 11:17:30 -07006 * geode-gx/lx/cs5536 - Andres Salomon <dilinger@debian.org>
Jaya Kumara2f7c352005-05-01 08:58:49 -07007 *
8 */
9
10#include <asm/delay.h>
11#include <linux/pci.h>
Denis V. Lunev3d034ae2007-08-07 13:13:18 +040012#include <linux/interrupt.h>
Jeremy Fitzhardinge973efae2007-05-02 19:27:06 +020013#include <asm/reboot_fixups.h>
Andres Salomon95069f82007-07-06 11:17:30 -070014#include <asm/msr.h>
Andres Salomon2e8c1242009-12-14 18:00:39 -080015#include <linux/cs5535.h>
Jaya Kumara2f7c352005-05-01 08:58:49 -070016
17static void cs5530a_warm_reset(struct pci_dev *dev)
18{
19 /* writing 1 to the reset control register, 0x44 causes the
20 cs5530a to perform a system warm reset */
21 pci_write_config_byte(dev, 0x44, 0x1);
22 udelay(50); /* shouldn't get here but be safe and spin-a-while */
23 return;
24}
25
Andres Salomon95069f82007-07-06 11:17:30 -070026static void cs5536_warm_reset(struct pci_dev *dev)
27{
Andres Salomon0387f452007-10-18 15:26:51 -040028 /* writing 1 to the LSB of this MSR causes a hard reset */
29 wrmsrl(MSR_DIVIL_SOFT_RESET, 1ULL);
Andres Salomon95069f82007-07-06 11:17:30 -070030 udelay(50); /* shouldn't get here but be safe and spin a while */
31}
32
Florian Fainelliff472a12008-01-30 13:33:36 +010033static void rdc321x_reset(struct pci_dev *dev)
34{
35 unsigned i;
36 /* Voluntary reset the watchdog timer */
37 outl(0x80003840, 0xCF8);
38 /* Generate a CPU reset on next tick */
39 i = inl(0xCFC);
40 /* Use the minimum timer resolution */
41 i |= 0x1600;
42 outl(i, 0xCFC);
43 outb(1, 0x92);
44}
45
Dirk Brandewie37bc9f52010-11-09 12:08:08 -080046static void ce4100_reset(struct pci_dev *dev)
47{
48 int i;
49
50 for (i = 0; i < 10; i++) {
51 outb(0x2, 0xcf9);
52 udelay(50);
53 }
54}
55
Jaya Kumara2f7c352005-05-01 08:58:49 -070056struct device_fixup {
57 unsigned int vendor;
58 unsigned int device;
59 void (*reboot_fixup)(struct pci_dev *);
60};
61
Dirk Brandewie37bc9f52010-11-09 12:08:08 -080062/*
63 * PCI ids solely used for fixups_table go here
64 */
65#define PCI_DEVICE_ID_INTEL_CE4100 0x0708
66
Jan Beulichebdd5612008-05-12 15:43:38 +020067static const struct device_fixup fixups_table[] = {
Jaya Kumara2f7c352005-05-01 08:58:49 -070068{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
Andres Salomon95069f82007-07-06 11:17:30 -070069{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
Denys6d1b30e2007-11-17 16:27:02 +010070{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset },
Florian Fainelliff472a12008-01-30 13:33:36 +010071{ PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030, rdc321x_reset },
Dirk Brandewie37bc9f52010-11-09 12:08:08 -080072{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CE4100, ce4100_reset },
Jaya Kumara2f7c352005-05-01 08:58:49 -070073};
74
75/*
76 * we see if any fixup is available for our current hardware. if there
77 * is a fixup, we call it and we expect to never return from it. if we
78 * do return, we keep looking and then eventually fall back to the
79 * standard mach_reboot on return.
80 */
81void mach_reboot_fixups(void)
82{
Jan Beulichebdd5612008-05-12 15:43:38 +020083 const struct device_fixup *cur;
Jaya Kumara2f7c352005-05-01 08:58:49 -070084 struct pci_dev *dev;
85 int i;
86
Denis V. Lunev3d034ae2007-08-07 13:13:18 +040087 /* we can be called from sysrq-B code. In such a case it is
88 * prohibited to dig PCI */
89 if (in_interrupt())
90 return;
91
Tobias Klauser38e548e2005-11-07 00:58:31 -080092 for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
Jaya Kumara2f7c352005-05-01 08:58:49 -070093 cur = &(fixups_table[i]);
Randy Dunlap874ec332005-10-30 15:03:29 -080094 dev = pci_get_device(cur->vendor, cur->device, NULL);
Jaya Kumara2f7c352005-05-01 08:58:49 -070095 if (!dev)
96 continue;
97
98 cur->reboot_fixup(dev);
Xiaotian Feng57fea8f2009-12-03 19:06:40 +080099 pci_dev_put(dev);
Jaya Kumara2f7c352005-05-01 08:58:49 -0700100 }
Jaya Kumara2f7c352005-05-01 08:58:49 -0700101}
102