1a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar/* 2a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * This is a good place to put board specific reboot fixups. 3a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * 4a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * List of supported fixups: 5a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz> 695069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon * geode-gx/lx/cs5536 - Andres Salomon <dilinger@debian.org> 7a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * 8a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar */ 9a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 10a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar#include <asm/delay.h> 11a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar#include <linux/pci.h> 123d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev#include <linux/interrupt.h> 13973efae21beb2feda138f152ed06d4204774d93cJeremy Fitzhardinge#include <asm/reboot_fixups.h> 1495069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon#include <asm/msr.h> 152e8c12436f540d3c40137ebf10268803dc972f6aAndres Salomon#include <linux/cs5535.h> 16a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 17a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumarstatic void cs5530a_warm_reset(struct pci_dev *dev) 18a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar{ 19a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar /* writing 1 to the reset control register, 0x44 causes the 20a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar cs5530a to perform a system warm reset */ 21a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar pci_write_config_byte(dev, 0x44, 0x1); 22a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar udelay(50); /* shouldn't get here but be safe and spin-a-while */ 23a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar return; 24a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar} 25a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 2695069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomonstatic void cs5536_warm_reset(struct pci_dev *dev) 2795069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon{ 280387f4511e05a5cba8570e47cd1c7b7cc7875787Andres Salomon /* writing 1 to the LSB of this MSR causes a hard reset */ 290387f4511e05a5cba8570e47cd1c7b7cc7875787Andres Salomon wrmsrl(MSR_DIVIL_SOFT_RESET, 1ULL); 3095069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon udelay(50); /* shouldn't get here but be safe and spin a while */ 3195069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon} 3295069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon 33ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainellistatic void rdc321x_reset(struct pci_dev *dev) 34ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli{ 35ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli unsigned i; 36ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli /* Voluntary reset the watchdog timer */ 37ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli outl(0x80003840, 0xCF8); 38ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli /* Generate a CPU reset on next tick */ 39ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli i = inl(0xCFC); 40ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli /* Use the minimum timer resolution */ 41ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli i |= 0x1600; 42ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli outl(i, 0xCFC); 43ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli outb(1, 0x92); 44ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli} 45ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli 4637bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewiestatic void ce4100_reset(struct pci_dev *dev) 4737bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie{ 4837bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie int i; 4937bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie 5037bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie for (i = 0; i < 10; i++) { 5137bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie outb(0x2, 0xcf9); 5237bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie udelay(50); 5337bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie } 5437bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie} 5537bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie 56a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumarstruct device_fixup { 57a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar unsigned int vendor; 58a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar unsigned int device; 59a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar void (*reboot_fixup)(struct pci_dev *); 60a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar}; 61a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 6237bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie/* 6337bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie * PCI ids solely used for fixups_table go here 6437bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie */ 6537bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie#define PCI_DEVICE_ID_INTEL_CE4100 0x0708 6637bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie 67ebdd561a19d7917ac49fff9c355aa4833c504bf1Jan Beulichstatic const struct device_fixup fixups_table[] = { 68a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset }, 6995069f89e80bb49ecc1b135bf85747e8dc6681f9Andres Salomon{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset }, 706d1b30e30ca1c831b82c44aedd2536820bdb2bc4Denys{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset }, 71ff472a114ca11f5354912745fbb94bb66ec10916Florian Fainelli{ PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030, rdc321x_reset }, 7237bc9f5078c62bfa73edeb0053edceb3ed5e46a4Dirk Brandewie{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CE4100, ce4100_reset }, 73a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar}; 74a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 75a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar/* 76a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * we see if any fixup is available for our current hardware. if there 77a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * is a fixup, we call it and we expect to never return from it. if we 78a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * do return, we keep looking and then eventually fall back to the 79a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar * standard mach_reboot on return. 80a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar */ 81a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumarvoid mach_reboot_fixups(void) 82a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar{ 83ebdd561a19d7917ac49fff9c355aa4833c504bf1Jan Beulich const struct device_fixup *cur; 84a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar struct pci_dev *dev; 85a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar int i; 86a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 873d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev /* we can be called from sysrq-B code. In such a case it is 883d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev * prohibited to dig PCI */ 893d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev if (in_interrupt()) 903d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev return; 913d034aecd8b70d34388a4e40ca50af0d014223e1Denis V. Lunev 9238e548ee1a79c8da7b3d9e26f2adce9b61413f84Tobias Klauser for (i=0; i < ARRAY_SIZE(fixups_table); i++) { 93a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar cur = &(fixups_table[i]); 94874ec33ff9ccf3651590697a2c2923b911bf31d0Randy Dunlap dev = pci_get_device(cur->vendor, cur->device, NULL); 95a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar if (!dev) 96a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar continue; 97a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 98a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar cur->reboot_fixup(dev); 9957fea8f7ab67ef42b7f84999e49e47f8717a2d5bXiaotian Feng pci_dev_put(dev); 100a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar } 101a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar} 102a2f7c354159b87dfbd9900f597d48d18755a9d16Jaya Kumar 103