diff options
author | stepan <stepan@coresystems.de> | 2010-12-08 05:42:47 +0000 |
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committer | Stefan Reinauer <stepan@openbios.org> | 2010-12-08 05:42:47 +0000 |
commit | 836ae29ee325b1e3d28ff59468cc50913b1e24ce (patch) | |
tree | e2691a1e1ee1d795ffe7a99fb93778a9910044c2 /src/southbridge/via/vt8231/vt8231_early_smbus.c | |
parent | 1bc5ccac51d94cfb4f9666ecf2cac619d8dc80a6 (diff) |
first round name simplification. drop the <component>_ prefix.
the prefix was introduced in the early v2 tree many years ago
because our old build system "newconfig" could not handle two files with
the same name in different paths like /path/to/usb.c and
/another/path/to/usb.c correctly. Only one of the files would end up
being compiled into the final image.
Since Kconfig (actually since shortly before we switched to Kconfig) we
don't suffer from that problem anymore. So we could drop the sb700_
prefix from all those filenames (or, the <componentname>_ prefix in general)
- makes it easier to fork off a new chipset
- makes it easier to diff against other chipsets
- storing redundant information in filenames seems wrong
Signed-off-by: <stepan@coresystems.de>
Acked-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6149 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/southbridge/via/vt8231/vt8231_early_smbus.c')
-rw-r--r-- | src/southbridge/via/vt8231/vt8231_early_smbus.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/src/southbridge/via/vt8231/vt8231_early_smbus.c b/src/southbridge/via/vt8231/vt8231_early_smbus.c deleted file mode 100644 index 7bf1267b75..0000000000 --- a/src/southbridge/via/vt8231/vt8231_early_smbus.c +++ /dev/null @@ -1,295 +0,0 @@ -#define SMBUS_IO_BASE 0x5000 - -#define SMBHSTSTAT 0x0 -#define SMBSLVSTAT 0x1 -#define SMBHSTCTL 0x2 -#define SMBHSTCMD 0x3 -#define SMBXMITADD 0x4 -#define SMBHSTDAT0 0x5 -#define SMBHSTDAT1 0x6 -#define SMBBLKDAT 0x7 -#define SMBSLVCTL 0x8 -#define SMBTRNSADD 0x9 -#define SMBSLVDATA 0xa -#define SMLINK_PIN_CTL 0xe -#define SMBUS_PIN_CTL 0xf - -/* Define register settings */ -#define HOST_RESET 0xff -#define READ_CMD 0x01 // 1 in the 0 bit of SMBHSTADD states to READ - - -#define SMBUS_TIMEOUT (100*1000*10) - -static void enable_smbus(void) -{ - device_t dev; - unsigned char c; - /* Power management controller */ - dev = pci_locate_device(PCI_ID(0x1106, 0x8235), 0); - - if (dev == PCI_DEV_INVALID) { - die("SMBUS controller not found\n"); - } - // set IO base address to SMBUS_IO_BASE - 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); - - /* make it work for I/O ... - */ - dev = pci_locate_device(PCI_ID(0x1106, 0x8231), 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\n"); - - print_debug("SMBus controller enabled\n"); -} - - -static inline void smbus_delay(void) -{ - outb(0x80, 0x80); -} - -static int smbus_wait_until_active(void) -{ - unsigned long loops; - loops = SMBUS_TIMEOUT; - do { - unsigned char val; - smbus_delay(); - val = inb(SMBUS_IO_BASE + SMBHSTSTAT); - if ((val & 1)) { - break; - } - } while (--loops); - return loops ? 0 : -4; -} - -static int smbus_wait_until_ready(void) -{ - unsigned long loops; - loops = SMBUS_TIMEOUT; - do { - unsigned char val; - smbus_delay(); - val = inb(SMBUS_IO_BASE + SMBHSTSTAT); - if ((val & 1) == 0) { - break; - } - if (loops == (SMBUS_TIMEOUT / 2)) { - outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); - } - } while (--loops); - return loops ? 0 : -2; -} - -static int smbus_wait_until_done(void) -{ - unsigned long loops; - loops = SMBUS_TIMEOUT; - do { - unsigned char val; - smbus_delay(); - - val = inb(SMBUS_IO_BASE + SMBHSTSTAT); - if ((val & 1) == 0) { - break; - } - } while (--loops); - return loops ? 0 : -3; -} - -#if 0 -void smbus_reset(void) -{ - outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT); - outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT); - outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT); - outb(HOST_RESET, SMBUS_IO_BASE + SMBHSTSTAT); - - smbus_wait_until_ready(); - print_debug("After reset status "); - print_debug_hex8(inb(SMBUS_IO_BASE + SMBHSTSTAT)); - print_debug("\n"); -} -#endif - -#if CONFIG_DEBUG_SMBUS -static void smbus_print_error(unsigned char host_status_register) -{ - - print_err("smbus_error: "); - print_err_hex8(host_status_register); - print_err("\n"); - if (host_status_register & (1 << 4)) { - print_err("Interrup/SMI# was Failed Bus Transaction\n"); - } - if (host_status_register & (1 << 3)) { - print_err("Bus Error\n"); - } - if (host_status_register & (1 << 2)) { - print_err("Device Error\n"); - } - if (host_status_register & (1 << 1)) { - print_err("Interrupt/SMI# was Successful Completion\n"); - } - if (host_status_register & (1 << 0)) { - print_err("Host Busy\n"); - } -} -#endif - -/* - * Copied from intel/i82801dbm early smbus code - suggested by rgm. - * Modifications/check against i2c-viapro driver code from linux-2.4.22 - * and VT8231 Reference Docs - mw. - */ -static int smbus_read_byte(unsigned device, unsigned address) -{ - unsigned char global_status_register; - unsigned char byte; - - if (smbus_wait_until_ready() < 0) { - outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); - if (smbus_wait_until_ready() < 0) { - return -2; - } - } - - /* setup transaction */ - /* disable interrupts */ - outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xfe, SMBUS_IO_BASE + SMBHSTCTL); - /* set the device I'm talking too */ - outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD); - /* set the command/address... */ - outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD); - /* set up for a byte data read */ - outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xe3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL); - - /* clear any lingering errors, so the transaction will run */ - outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); - - /* clear the data byte... */ - outb(0, SMBUS_IO_BASE + SMBHSTDAT0); - - /* start a byte read, with interrupts disabled */ - outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL); - /* poll for it to start */ - if (smbus_wait_until_active() < 0) { - return -4; - } - - /* poll for transaction completion */ - if (smbus_wait_until_done() < 0) { - return -3; - } - - /* Ignore the Host Busy & Command Complete ? */ - global_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT) & ~((1 << 1) | (1 << 0)); - - /* read results of transaction */ - byte = inb(SMBUS_IO_BASE + SMBHSTDAT0); - - if (global_status_register != 0) { - return -1; - } - return byte; -} - -#if 0 -/* SMBus routines borrowed from VIA's Trident Driver */ -/* this works, so I am not going to touch it for now -- rgm */ -static unsigned char smbus_read_byte(unsigned char devAdr, unsigned char bIndex) -{ - unsigned int i; - unsigned char bData; - unsigned char sts = 0; - - /* clear host status */ - outb(0xff, SMBUS_IO_BASE); - - /* check SMBUS ready */ - for (i = 0; i < SMBUS_TIMEOUT; i++) - if ((inb(SMBUS_IO_BASE) & 0x01) == 0) - break; - - /* set host command */ - outb(bIndex, SMBUS_IO_BASE + 3); - - /* set slave address */ - outb(devAdr | 0x01, SMBUS_IO_BASE + 4); - - /* start */ - outb(0x48, SMBUS_IO_BASE + 2); - - /* SMBUS Wait Ready */ - for (i = 0; i < SMBUS_TIMEOUT; i++) - if (((sts = inb(SMBUS_IO_BASE)) & 0x01) == 0) - break; - if ((sts & ~3) != 0) { - smbus_print_error(sts); - return 0; - } - bData = inb(SMBUS_IO_BASE + 5); - - return bData; - -} -#endif -/* for reference, here is the fancier version which we will use at some - * point - */ -# if 0 -int smbus_read_byte(unsigned device, unsigned address, unsigned char *result) -{ - unsigned char host_status_register; - unsigned char byte; - - reset(); - - smbus_wait_until_ready(); - - /* setup transaction */ - /* disable interrupts */ - outb(inb(SMBUS_IO_BASE + SMBHSTCTL) & (~1), SMBUS_IO_BASE + SMBHSTCTL); - /* set the device I'm talking too */ - outb(((device & 0x7f) << 1) | 1, SMBUS_IO_BASE + SMBXMITADD); - /* set the command/address... */ - outb(address & 0xFF, SMBUS_IO_BASE + SMBHSTCMD); - /* set up for a byte data read */ - outb((inb(SMBUS_IO_BASE + SMBHSTCTL) & 0xE3) | (0x2 << 2), SMBUS_IO_BASE + SMBHSTCTL); - - /* clear any lingering errors, so the transaction will run */ - outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); - - /* clear the data byte... */ - outb(0, SMBUS_IO_BASE + SMBHSTDAT0); - - /* start the command */ - outb((inb(SMBUS_IO_BASE + SMBHSTCTL) | 0x40), SMBUS_IO_BASE + SMBHSTCTL); - - /* poll for transaction completion */ - smbus_wait_until_done(); - - host_status_register = inb(SMBUS_IO_BASE + SMBHSTSTAT); - - /* Ignore the In Use Status... */ - host_status_register &= ~(1 << 6); - - /* read results of transaction */ - byte = inb(SMBUS_IO_BASE + SMBHSTDAT0); - smbus_print_error(byte); - - *result = byte; - return host_status_register != 0x02; -} - - -#endif |