diff options
Diffstat (limited to 'src/southbridge/intel/i82801xx')
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx.h | 25 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx_lpc.c | 243 |
2 files changed, 170 insertions, 98 deletions
diff --git a/src/southbridge/intel/i82801xx/i82801xx.h b/src/southbridge/intel/i82801xx/i82801xx.h index fa306bc0a4..41179c9640 100644 --- a/src/southbridge/intel/i82801xx/i82801xx.h +++ b/src/southbridge/intel/i82801xx/i82801xx.h @@ -33,21 +33,30 @@ extern void i82801xx_enable(device_t dev); #define RTC_CONF 0xd8 #define GEN_PMCON_3 0xa4 -#define PCICMD 0x04 #define PMBASE 0x40 -#define PM_BASE_ADDR 0x1100 #define ACPI_CNTL 0x44 #define BIOS_CNTL 0x4E -#define GPIO_BASE 0x58 -#define GPIO_BASE_ADDR 0x1180 -#define GPIO_CNTL 0x5C +#define GPIO_BASE_ICH0_5 0x58 /* LPC GPIO Base Addr. Reg. (ICH0-ICH5) */ +#define GPIO_BASE_ICH6_9 0x48 /* LPC GPIO Base Address Register (ICH6-ICH9) */ +#define GPIO_CNTL_ICH0_5 0x5C /* LPC GPIO Control Register (ICH0-ICH5) */ +#define GPIO_CNTL_ICH6_9 0x4C /* LPC GPIO Control Register (ICH6-ICH9) */ + #define PIRQA_ROUT 0x60 +#define PIRQB_ROUT 0x61 +#define PIRQC_ROUT 0x62 +#define PIRQD_ROUT 0x63 #define PIRQE_ROUT 0x68 -#define COM_DEC 0xE0 -#define LPC_EN 0xE6 +#define PIRQF_ROUT 0x69 +#define PIRQG_ROUT 0x6A +#define PIRQH_ROUT 0x6B + #define FUNC_DIS 0xF2 -#define CMD 0x04 +#define COM_DEC 0xE0 /* LPC I/F Communication Port Decode Ranges (ICH0-ICH5) */ +#define LPC_IO_DEC 0x80 /* IO Decode Ranges Register (ICH6-ICH9) */ +#define LPC_EN_ICH0_5 0xE6 /* LPC IF Enables Register (ICH0-ICH5) */ +#define LPC_EN_ICH6_9 0x82 /* LPC IF Enables Register (ICH6-ICH9) */ + #define SBUS_NUM 0x19 #define SUB_BUS_NUM 0x1A #define SMLT 0x1B diff --git a/src/southbridge/intel/i82801xx/i82801xx_lpc.c b/src/southbridge/intel/i82801xx/i82801xx_lpc.c index 6d35c187ec..eefd7bb9f1 100644 --- a/src/southbridge/intel/i82801xx/i82801xx_lpc.c +++ b/src/southbridge/intel/i82801xx/i82801xx_lpc.c @@ -32,14 +32,53 @@ #include <arch/io.h> #include "i82801xx.h" +#define PMBASE_ADDR 0x00000400 /* ACPI Base Address Register */ +#define GPIO_BASE_ADDR 0x00000500 /* GPIO Base Address Register */ + #define NMI_OFF 0 -void i82801xx_enable_ioapic(struct device *dev) +/* PIRQ[n]_ROUT[3:0] - PIRQ Routing Control + * 0x00 - 0000 = Reserved + * 0x01 - 0001 = Reserved + * 0x02 - 0010 = Reserved + * 0x03 - 0011 = IRQ3 + * 0x04 - 0100 = IRQ4 + * 0x05 - 0101 = IRQ5 + * 0x06 - 0110 = IRQ6 + * 0x07 - 0111 = IRQ7 + * 0x08 - 1000 = Reserved + * 0x09 - 1001 = IRQ9 + * 0x0A - 1010 = IRQ10 + * 0x0B - 1011 = IRQ11 + * 0x0C - 1100 = IRQ12 + * 0x0D - 1101 = Reserved + * 0x0E - 1110 = IRQ14 + * 0x0F - 1111 = IRQ15 + * PIRQ[n]_ROUT[7] - PIRQ Routing Control + * 0x80 - The PIRQ is not routed. + */ + +#define PIRQA 0x03 +#define PIRQB 0x05 +#define PIRQC 0x06 +#define PIRQD 0x07 +#define PIRQE 0x09 +#define PIRQF 0x0A +#define PIRQG 0x0B +#define PIRQH 0x0C + +void i82801xx_enable_apic(struct device *dev) { uint32_t reg32; volatile uint32_t *ioapic_index = (volatile uint32_t *)0xfec00000; volatile uint32_t *ioapic_data = (volatile uint32_t *)0xfec00010; + /* Set ACPI base address (I/O space). */ + pci_write_config32(dev, PMBASE, (PMBASE_ADDR | 1)); + + /* Enable ACPI I/O and power management. */ + pci_write_config8(dev, ACPI_CNTL, 0x10); + reg32 = pci_read_config32(dev, GEN_CNTL); reg32 |= (3 << 7); /* Enable IOAPIC */ reg32 |= (1 << 13); /* Coprocessor error enable */ @@ -58,8 +97,8 @@ void i82801xx_enable_ioapic(struct device *dev) die("APIC Error\n"); /* TODO: From i82801ca, needed/useful on other ICH? */ - *ioapic_index = 3; // Select Boot Configuration register - *ioapic_data = 1; // Use Processor System Bus to deliver interrupts + *ioapic_index = 3; /* Select Boot Configuration register. */ + *ioapic_data = 1; /* Use Processor System Bus to deliver interrupts. */ } void i82801xx_enable_serial_irqs(struct device *dev) @@ -72,22 +111,67 @@ void i82801xx_enable_serial_irqs(struct device *dev) /* TODO: Explain/#define the real meaning of these magic numbers. */ } -void i82801xx_lpc_route_dma(struct device *dev, uint8_t mask) +static void i82801xx_pirq_init(device_t dev, uint16_t ich_model) { - uint16_t reg16; - int i; + /* Route PIRQA - PIRQD. */ + pci_write_config8(dev, PIRQA_ROUT, PIRQA); + pci_write_config8(dev, PIRQB_ROUT, PIRQB); + pci_write_config8(dev, PIRQC_ROUT, PIRQC); + pci_write_config8(dev, PIRQD_ROUT, PIRQD); + + /* Route PIRQE - PIRQH (for ICH2-ICH9). */ + if (ich_model >= 0x2440) { + pci_write_config8(dev, PIRQE_ROUT, PIRQE); + pci_write_config8(dev, PIRQF_ROUT, PIRQF); + pci_write_config8(dev, PIRQG_ROUT, PIRQG); + pci_write_config8(dev, PIRQH_ROUT, PIRQH); + } +} - reg16 = pci_read_config16(dev, PCI_DMA_CFG); - reg16 &= 0x300; - for (i = 0; i < 8; i++) { - if (i == 4) - continue; - reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2); +static void i82801xx_power_options(device_t dev) +{ + uint8_t byte; + int pwr_on = -1; + int nmi_option; + + /* 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 if power fails\n", pwr_on ? "on" : "off"); + + /* 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); + } +} + +static void gpio_init(device_t dev, uint16_t ich_model) +{ + /* Set the value for GPIO base address register and enable GPIO. + * Note: ICH-ICH5 registers differ from ICH6-ICH9. + */ + if (ich_model <= 0x24D0) { + pci_write_config32(dev, GPIO_BASE_ICH0_5, (GPIO_BASE_ADDR | 1)); + pci_write_config8(dev, GPIO_CNTL_ICH0_5, 0x10); + } else if (ich_model >= 0x2640) { + pci_write_config32(dev, GPIO_BASE_ICH6_9, (GPIO_BASE_ADDR | 1)); + pci_write_config8(dev, GPIO_CNTL_ICH6_9, 0x10); } - pci_write_config16(dev, PCI_DMA_CFG, reg16); } -/* TODO: Needs serious cleanup/comments. */ void i82801xx_rtc_init(struct device *dev) { uint8_t reg8; @@ -97,46 +181,47 @@ void i82801xx_rtc_init(struct device *dev) reg8 = pci_read_config8(dev, GEN_PMCON_3); rtc_failed = reg8 & RTC_BATTERY_DEAD; if (rtc_failed) { - reg8 &= ~(1 << 1); /* preserve the power fail state */ + reg8 &= ~(1 << 1); /* Preserve the power fail state. */ pci_write_config8(dev, GEN_PMCON_3, reg8); } reg32 = pci_read_config32(dev, GEN_STS); rtc_failed |= reg32 & (1 << 2); rtc_init(rtc_failed); + + /* Enable access to the upper 128 byte bank of CMOS RAM. */ + pci_write_config8(dev, RTC_CONF, 0x04); } -void i82801xx_1f0_misc(struct device *dev) +void i82801xx_lpc_route_dma(struct device *dev, uint8_t mask) { - /* TODO: break this down into smaller functions */ + uint16_t reg16; + int i; - //move to acpi_enable or something - /* Set ACPI base address to 0x1100 (I/O space) */ - pci_write_config32(dev, PMBASE, PM_BASE_ADDR | 1); - /* Enable ACPI I/O and power management */ - pci_write_config8(dev, ACPI_CNTL, 0x10); - /* Set GPIO base address to 0x1180 (I/O space) */ - pci_write_config32(dev, GPIO_BASE, GPIO_BASE_ADDR | 1); - /* Enable GPIO */ - pci_write_config8(dev, GPIO_CNTL, 0x10); - - //get rid of? - /* Route PIRQA to IRQ11, PIRQB to IRQ3, PIRQC to IRQ5, PIRQD to IRQ10 */ - pci_write_config32(dev, PIRQA_ROUT, 0x0A05030B); - /* Route PIRQE to IRQ7. Leave PIRQF - PIRQH unrouted */ - pci_write_config8(dev, PIRQE_ROUT, 0x07); - - //move to i82801xx_init - /* Prevent LPC disabling, enable parity errors, and SERR# (System Error) */ - pci_write_config16(dev, PCI_COMMAND, 0x014f); - /* Enable access to the upper 128 byte bank of CMOS RAM */ - pci_write_config8(dev, RTC_CONF, 0x04); - /* Decode 0x3F8-0x3FF (COM1) for COMA port, 0x2F8-0x2FF (COM2) for COMB */ - pci_write_config8(dev, COM_DEC, 0x10); - /* LPT decode defaults to 0x378-0x37F and 0x778-0x77F - * Floppy decode defaults to 0x3F0-0x3F5, 0x3F7 */ - /* Enable: COMA, COMB, LPT, Floppy - * Disable: Microcontroller, Sound, Gameport */ - pci_write_config16(dev, LPC_EN, 0x000F); + reg16 = pci_read_config16(dev, PCI_DMA_CFG); + reg16 &= 0x300; + for (i = 0; i < 8; i++) { + if (i == 4) + continue; + reg16 |= ((mask & (1 << i)) ? 3 : 1) << (i * 2); + } + pci_write_config16(dev, PCI_DMA_CFG, reg16); +} + +static void i82801xx_lpc_decode_en(device_t dev, uint16_t ich_model) +{ + /* Decode 0x3F8-0x3FF (COM1) for COMA port, 0x2F8-0x2FF (COM2) for COMB. + * LPT decode defaults to 0x378-0x37F and 0x778-0x77F. + * Floppy decode defaults to 0x3F0-0x3F5, 0x3F7. + * We also need to set the value for LPC I/F Enables Register. + * Note: ICH-ICH5 registers differ from ICH6-ICH9. + */ + if (ich_model <= 0x24D0) { + pci_write_config8(dev, COM_DEC, 0x10); + pci_write_config16(dev, LPC_EN_ICH0_5, 0x300F); + } else if (ich_model >= 0x2640) { + pci_write_config8(dev, LPC_IO_DEC, 0x10); + pci_write_config16(dev, LPC_EN_ICH6_9, 0x300F); + } } static void enable_hpet(struct device *dev) @@ -146,7 +231,7 @@ static void enable_hpet(struct device *dev) uint32_t code = (0 & 0x3); reg32 = pci_read_config32(dev, GEN_CNTL); - reg32 |= (1 << 17); /* Enable HPET */ + reg32 |= (1 << 17); /* Enable HPET. */ /* * Bits [16:15] Memory Address Range * 00 FED0_0000h - FED0_03FFh @@ -156,67 +241,45 @@ static void enable_hpet(struct device *dev) */ reg32 &= ~(3 << 15); /* Clear it */ reg32 |= (code << 15); - /* reg32 is never written to anywhere? */ + /* TODO: reg32 is never written to anywhere? */ printk_debug("Enabling HPET @0x%x\n", HPET_ADDR | (code << 12)); #endif } static void lpc_init(struct device *dev) { - uint8_t byte; - int pwr_on = -1; - int nmi_option; + uint16_t ich_model = pci_read_config16(dev, PCI_DEVICE_ID); - /* IO APIC initialization */ - i82801xx_enable_ioapic(dev); + /* Set the value for PCI command register. */ + pci_write_config16(dev, PCI_COMMAND, 0x000f); - i82801xx_enable_serial_irqs(dev); + /* IO APIC initialization. */ + i82801xx_enable_apic(dev); - /* TODO: Find out if this is being used/works */ -#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. - */ + i82801xx_enable_serial_irqs(dev); - /* Posted memory write enable */ - byte = pci_read_config8(dev, 0x46); - pci_write_config8(dev, 0x46, byte | (1 << 0)); -#endif + /* Setup the PIRQ. */ + i82801xx_pirq_init(dev, ich_model); - /* 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 if power fails\n", pwr_on ? "on" : "off"); + /* Setup power options. */ + i82801xx_power_options(dev); - /* 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); + /* Set the state of the GPIO lines. */ + gpio_init(dev, ich_model); - 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 */ + /* Initialize the real time clock. */ i82801xx_rtc_init(dev); + /* Route DMA. */ i82801xx_lpc_route_dma(dev, 0xff); - /* Initialize isa dma */ + /* Initialize ISA DMA. */ isa_dma_init(); - i82801xx_1f0_misc(dev); - /* Initialize the High Precision Event Timers, if present */ + /* Setup decode ports and LPC I/F enables. */ + i82801xx_lpc_decode_en(dev, ich_model); + + /* Initialize the High Precision Event Timers, if present. */ enable_hpet(dev); } @@ -224,10 +287,10 @@ static void i82801xx_lpc_read_resources(device_t dev) { struct resource *res; - /* Get the normal pci resources of this device */ + /* Get the normal PCI resources of this device. */ pci_dev_read_resources(dev); - /* Add an extra subtractive resource for both memory and I/O */ + /* 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; |