/* * (C) 2003 Linux Networx, SuSE Linux AG * (C) 2004 Tyan Computer */ #include #include #include #include #include #include #include #include #include "i82801dbm.h" #define NMI_OFF 0 void i82801dbm_enable_ioapic( struct device *dev) { uint32_t dword; volatile uint32_t *ioapic_sba = (volatile uint32_t *)0xfec00000; volatile uint32_t *ioapic_sbd = (volatile uint32_t *)0xfec00010; dword = pci_read_config32(dev, GEN_CNTL); dword |= (3 << 7); /* enable ioapic */ dword |= (1 <<13); /* coprocessor error enable */ dword |= (1 << 1); /* delay transaction enable */ dword |= (1 << 2); /* DMA collection buf enable */ pci_write_config32(dev, GEN_CNTL, dword); printk_debug("ioapic southbridge enabled %x\n",dword); *ioapic_sba=0; *ioapic_sbd=(2<<24); //lyh *ioapic_sba=3; //lyh *ioapic_sbd=1; *ioapic_sba=0; dword=*ioapic_sbd; printk_debug("Southbridge apic id = %x\n",dword); if(dword!=(2<<24)) for(;;); //lyh *ioapic_sba=3; //lyh dword=*ioapic_sbd; //lyh printk_debug("Southbridge apic DT = %x\n",dword); //lyh if(dword!=1) //lyh for(;;); } void i82801dbm_enable_serial_irqs( struct device *dev) { pci_write_config8(dev, SERIRQ_CNTL, (1 << 7)|(1 << 6)|((21 - 17) << 2)|(0<< 0)); } void i82801dbm_lpc_route_dma( struct device *dev, uint8_t mask) { uint16_t word; int i; word = pci_read_config16(dev, PCI_DMA_CFG); word &= ((1 << 10) - (1 << 8)); for(i = 0; i < 8; i++) { if (i == 4) continue; word |= ((mask & (1 << i))? 3:1) << (i*2); } pci_write_config16(dev, PCI_DMA_CFG, word); } void i82801dbm_rtc_init(struct device *dev) { uint8_t byte; uint32_t dword; int rtc_failed; byte = pci_read_config8(dev, GEN_PMCON_3); rtc_failed = byte & RTC_FAILED; if (rtc_failed) { byte &= ~(1 << 1); /* preserve the power fail state */ pci_write_config8(dev, GEN_PMCON_3, byte); } dword = pci_read_config32(dev, GEN_STS); rtc_failed |= dword & (1 << 2); rtc_init(rtc_failed); } void i82801dbm_1f0_misc(struct device *dev) { pci_write_config16(dev, PCICMD, 0x014f); pci_write_config32(dev, PMBASE, 0x00001001); pci_write_config8(dev, ACPI_CNTL, 0x10); pci_write_config32(dev, GPIO_BASE, 0x00001181); pci_write_config8(dev, GPIO_CNTL, 0x10); pci_write_config32(dev, PIRQA_ROUT, 0x0A05030B); pci_write_config8(dev, PIRQE_ROUT, 0x07); pci_write_config8(dev, RTC_CONF, 0x04); pci_write_config8(dev, COM_DEC, 0x10); //lyh E0-> pci_write_config16(dev, LPC_EN, 0x000F); //LYH 000D-> } static void enable_hpet(struct device *dev) { const unsigned long hpet_address = 0xfed0000; uint32_t dword; uint32_t code = (0 & 0x3); dword = pci_read_config32(dev, GEN_CNTL); dword |= (1 << 17); /* enable hpet */ /*Bits [16:15]Memory Address Range 00 FED0_0000h - FED0_03FFh 01 FED0_1000h - FED0_13FFh 10 FED0_2000h - FED0_23FFh 11 FED0_3000h - FED0_33FFh*/ dword &= ~(3 << 15); /* clear it */ dword |= (code<<15); printk_debug("enabling HPET @0x%x\n", hpet_address | (code <<12) ); } static void lpc_init(struct device *dev) { uint8_t byte; int pwr_on=-1; int nmi_option; /* IO APIC initialization */ i82801dbm_enable_ioapic(dev); i82801dbm_enable_serial_irqs(dev); #ifdef SUSPICIOUS_LOOKING_CODE // The ICH-4 datasheet does not mention this configuration register. // This code may have been inherited (incorrectly) from code for the AMD 766 southbridge, // which *does* support this functionality. /* posted memory write enable */ byte = pci_read_config8(dev, 0x46); pci_write_config8(dev, 0x46, byte | (1<<0)); #endif /* power after power fail */ /* FIXME this doesn't work! */ /* Which state do we want to goto after g3 (power restored)? * 0 == S0 Full On * 1 == S5 Soft Off */ pci_write_config8(dev, GEN_PMCON_3, pwr_on?0:1); printk_info("set power %s after power fail\n", pwr_on?"on":"off"); #if 0 /* Enable Error reporting */ /* Set up sync flood detected */ byte = pci_read_config8(dev, 0x47); byte |= (1 << 1); pci_write_config8(dev, 0x47, byte); #endif /* Set up NMI on errors */ byte = inb(0x61); byte &= ~(1 << 3); /* IOCHK# NMI Enable */ byte &= ~(1 << 2); /* PCI SERR# Enable */ outb(byte, 0x61); byte = inb(0x70); nmi_option = NMI_OFF; get_option(&nmi_option, "nmi"); if (nmi_option) { byte &= ~(1 << 7); /* set NMI */ outb(byte, 0x70); } /* Initialize the real time clock */ i82801dbm_rtc_init(dev); i82801dbm_lpc_route_dma(dev, 0xff); /* Initialize isa dma */ isa_dma_init(); i82801dbm_1f0_misc(dev); /* Initialize the High Precision Event Timers */ enable_hpet(dev); } static void i82801dbm_lpc_read_resources(device_t dev) { struct resource *res; /* Get the normal pci resources of this device */ pci_dev_read_resources(dev); /* Add an extra subtractive resource for both memory and I/O */ res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; } static void i82801dbm_lpc_enable_resources(device_t dev) { pci_dev_enable_resources(dev); enable_childrens_resources(dev); } static struct device_operations lpc_ops = { .read_resources = i82801dbm_lpc_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = i82801dbm_lpc_enable_resources, .init = lpc_init, .scan_bus = scan_static_bus, .enable = i82801dbm_enable, }; static struct pci_driver lpc_driver __pci_driver = { .ops = &lpc_ops, .vendor = PCI_VENDOR_ID_INTEL, .device = PCI_DEVICE_ID_INTEL_82801DBM_1F0, };