From b717e48352fe5466a92431f1597b85f902d75673 Mon Sep 17 00:00:00 2001 From: Greg Watson Date: Thu, 22 Apr 2004 22:31:49 +0000 Subject: start of epia-m port git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1524 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/southbridge/via/vt8235/vt8235.c | 14 +++---- src/southbridge/via/vt8235/vt8235_early_serial.c | 53 +++++++++++++----------- src/southbridge/via/vt8235/vt8235_early_smbus.c | 35 ++++++++++------ 3 files changed, 58 insertions(+), 44 deletions(-) (limited to 'src/southbridge/via/vt8235') diff --git a/src/southbridge/via/vt8235/vt8235.c b/src/southbridge/via/vt8235/vt8235.c index 8d5292fad2..ca5ab32ac3 100644 --- a/src/southbridge/via/vt8235/vt8235.c +++ b/src/southbridge/via/vt8235/vt8235.c @@ -229,7 +229,7 @@ static void vt8235_init(struct southbridge_via_vt8235_config *conf) /* IDE controller */ dev1 = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, 0); /* Power management controller */ - devpwr = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_4, 0); + //devpwr = dev_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_4, 0); // enable the internal I/O decode enables = pci_read_config8(dev0, 0x6C); @@ -315,22 +315,22 @@ static void vt8235_init(struct southbridge_via_vt8235_config *conf) // Power management setup // // Set ACPI base address to IO 0x4000 - pci_write_config32(devpwr, 0x48, 0x4001); + //pci_write_config32(devpwr, 0x48, 0x4001); // Enable ACPI access (and setup like award) - pci_write_config8(devpwr, 0x41, 0x84); + //pci_write_config8(devpwr, 0x41, 0x84); // Set hardware monitor base address to IO 0x6000 - pci_write_config32(devpwr, 0x70, 0x6001); + //pci_write_config32(devpwr, 0x70, 0x6001); // Enable hardware monitor (and setup like award) - pci_write_config8(devpwr, 0x74, 0x01); + //pci_write_config8(devpwr, 0x74, 0x01); // set IO base address to 0x5000 - pci_write_config32(devpwr, 0x90, 0x5001); + //pci_write_config32(devpwr, 0x90, 0x5001); // Enable SMBus - pci_write_config8(devpwr, 0xd2, 0x01); + //pci_write_config8(devpwr, 0xd2, 0x01); // // IDE setup diff --git a/src/southbridge/via/vt8235/vt8235_early_serial.c b/src/southbridge/via/vt8235/vt8235_early_serial.c index 4e59bbf3ec..3191057811 100644 --- a/src/southbridge/via/vt8235/vt8235_early_serial.c +++ b/src/southbridge/via/vt8235/vt8235_early_serial.c @@ -8,12 +8,19 @@ #define SIO_BASE 0x3f0 #define SIO_DATA SIO_BASE+1 -static void vt8235_writesuper(uint8_t reg, uint8_t val) +static void vt8235_writepnpaddr(uint8_t val) { - outb(reg, SIO_BASE); - outb(val, SIO_DATA); + outb(val, 0x2e); + outb(val, 0xeb); } +static void vt8235_writepnpdata(uint8_t val) +{ + outb(val, 0x2f); + outb(val, 0xeb); +} + + static void vt8235_writesiobyte(uint16_t reg, uint8_t val) { outb(val, reg); @@ -34,30 +41,28 @@ static void enable_vt8235_serial(void) unsigned long x; uint8_t c; device_t dev; - outb(6, 0x80); - dev = pci_locate_device(PCI_ID(0x1106,0x8235), 0); - - if (dev == PCI_DEV_INVALID) { - outb(7, 0x80); - die("Serial controller not found\r\n"); - } - - /* first, you have to enable the superio and superio config. - put a 6 reg 80 - */ - c = pci_read_config8(dev, 0x50); - c |= 6; - pci_write_config8(dev, 0x50, c); - outb(2, 0x80); + // turn on pnp + vt8235_writepnpaddr(0x87); + vt8235_writepnpaddr(0x87); // now go ahead and set up com1. // set address - vt8235_writesuper(0xf4, 0xfe); + vt8235_writepnpaddr(0x7); + vt8235_writepnpdata(0x2); // enable serial out - vt8235_writesuper(0xf2, 7); - // That's it for the sio stuff. - // movl $SUPERIOCONFIG, %eax - // movb $9, %dl - // PCI_WRITE_CONFIG_BYTE + vt8235_writepnpaddr(0x30); + vt8235_writepnpdata(0x1); + // serial port 1 base address (FEh) + vt8235_writepnpaddr(0x60); + vt8235_writepnpdata(0xfe); + // serial port 1 IRQ (04h) + vt8235_writepnpaddr(0x70); + vt8235_writepnpdata(0x4); + // serial port 1 control + vt8235_writepnpaddr(0xf0); + vt8235_writepnpdata(0x2); + // turn of pnp + vt8235_writepnpaddr(0xaa); + // set up reg to set baud rate. vt8235_writesiobyte(0x3fb, 0x80); // Set 115 kb diff --git a/src/southbridge/via/vt8235/vt8235_early_smbus.c b/src/southbridge/via/vt8235/vt8235_early_smbus.c index 9d03dacd44..79b73df01e 100644 --- a/src/southbridge/via/vt8235/vt8235_early_smbus.c +++ b/src/southbridge/via/vt8235/vt8235_early_smbus.c @@ -1,4 +1,4 @@ -#define SMBUS_IO_BASE 0x5000 +#define SMBUS_IO_BASE 0xf00 #define SMBHSTSTAT 0x0 #define SMBSLVSTAT 0x1 @@ -22,12 +22,15 @@ #define SMBUS_TIMEOUT (100*1000*10) +#define I2C_TRANS_CMD 0x40 +#define CLOCK_SLAVE_ADDRESS 0x69 + static void enable_smbus(void) { device_t dev; unsigned char c; /* Power management controller */ - dev = pci_locate_device(PCI_ID(0x1106,0x8235), 0); + dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235), 0); if (dev == PCI_DEV_INVALID) { die("SMBUS controller not found\r\n"); @@ -37,20 +40,26 @@ static void enable_smbus(void) pci_write_config32(dev, 0x90, SMBUS_IO_BASE|1); // Enable SMBus - c = pci_read_config8(dev, 0xd2); - c |= 5; - pci_write_config8(dev, 0xd2, c); + pci_write_config8(dev, 0xd2, (0x4 << 1)|1); /* make it work for I/O ... */ - dev = pci_locate_device(PCI_ID(0x1106,0x8235), 0); - c = pci_read_config8(dev, 4); - c |= 1; - pci_write_config8(dev, 4, c); - print_debug_hex8(c); - print_debug(" is the comm register\r\n"); - - print_debug("SMBus controller enabled\r\n"); + pci_write_config8(dev, 4, 1); + +/* The VT1211 serial port needs 48 mhz clock, on power up it is getting + only 24 mhz, there is some mysterious device on the smbus that can + fix this...this code below does it. */ + outb(0xff, SMBUS_IO_BASE+SMBHSTSTAT); + outb(0x7f, SMBUS_IO_BASE+SMBHSTDAT0); + outb(0x83, SMBUS_IO_BASE+SMBHSTCMD); + outb(CLOCK_SLAVE_ADDRESS<<1, SMBUS_IO_BASE+SMBXMITADD); + outb(8 | I2C_TRANS_CMD, SMBUS_IO_BASE+SMBHSTCTL); + + for (;;) { + c = inb(SMBUS_IO_BASE+SMBHSTSTAT); + if (c & 1 == 0) + break; + } } -- cgit v1.2.3