projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a2f7c354 | 1 | /* |
| a2f7c354 JK |
2 | * 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> | |
| 95069f89 | 6 | * geode-gx/lx/cs5536 - Andres Salomon <dilinger@debian.org> |
| a2f7c354 JK |
7 | * |
| 8 | */ | |
| 9 | ||
| 10 | #include <asm/delay.h> | |
| 11 | #include <linux/pci.h> | |
| 3d034aec | 12 | #include <linux/interrupt.h> |
| 973efae2 | 13 | #include <asm/reboot_fixups.h> |
| 95069f89 | 14 | #include <asm/msr.h> |
| 2e8c1243 | 15 | #include <linux/cs5535.h> |
| a2f7c354 JK |
16 | |
| 17 | static 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 | ||
| 95069f89 AS |
26 | static void cs5536_warm_reset(struct pci_dev *dev) |
| 27 | { | |
| 0387f451 AS |
28 | /* writing 1 to the LSB of this MSR causes a hard reset */ |
| 29 | wrmsrl(MSR_DIVIL_SOFT_RESET, 1ULL); | |
| 95069f89 AS |
30 | udelay(50); /* shouldn't get here but be safe and spin a while */ |
| 31 | } | |
| 32 | ||
| ff472a11 FF |
33 | static 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 | ||
| 37bc9f50 DB |
46 | static 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 | ||
| a2f7c354 JK |
56 | struct device_fixup { |
| 57 | unsigned int vendor; | |
| 58 | unsigned int device; | |
| 59 | void (*reboot_fixup)(struct pci_dev *); | |
| 60 | }; | |
| 61 | ||
| 37bc9f50 DB |
62 | /* |
| 63 | * PCI ids solely used for fixups_table go here | |
| 64 | */ | |
| 65 | #define PCI_DEVICE_ID_INTEL_CE4100 0x0708 | |
| 66 | ||
| ebdd561a | 67 | static const struct device_fixup fixups_table[] = { |
| a2f7c354 | 68 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset }, |
| 95069f89 | 69 | { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset }, |
| 6d1b30e3 | 70 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset }, |
| ff472a11 | 71 | { PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030, rdc321x_reset }, |
| 37bc9f50 | 72 | { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CE4100, ce4100_reset }, |
| a2f7c354 JK |
73 | }; |
| 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 | */ | |
| 81 | void mach_reboot_fixups(void) | |
| 82 | { | |
| ebdd561a | 83 | const struct device_fixup *cur; |
| a2f7c354 JK |
84 | struct pci_dev *dev; |
| 85 | int i; | |
| 86 | ||
| 3d034aec DL |
87 | /* 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 | ||
| 38e548ee | 92 | for (i=0; i < ARRAY_SIZE(fixups_table); i++) { |
| a2f7c354 | 93 | cur = &(fixups_table[i]); |
| 874ec33f | 94 | dev = pci_get_device(cur->vendor, cur->device, NULL); |
| a2f7c354 JK |
95 | if (!dev) |
| 96 | continue; | |
| 97 | ||
| 98 | cur->reboot_fixup(dev); | |
| 57fea8f7 | 99 | pci_dev_put(dev); |
| a2f7c354 | 100 | } |
| a2f7c354 JK |
101 | } |
| 102 |