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

1 files changed, 101 insertions, 0 deletions

diff --git a/src/southbridge/intel/esb6300/smbus.h b/src/southbridge/intel/esb6300/smbus.h
new file mode 100644
index 0000000000..4f4ec5c999
--- /dev/null
+++ b/src/southbridge/intel/esb6300/smbus.h
@@ -0,0 +1,101 @@
+#include <device/smbus_def.h>
+
+#define SMBHSTSTAT 0x0
+#define SMBHSTCTL  0x2
+#define SMBHSTCMD  0x3
+#define SMBXMITADD 0x4
+#define SMBHSTDAT0 0x5
+#define SMBHSTDAT1 0x6
+#define SMBBLKDAT  0x7
+#define SMBTRNSADD 0x9
+#define SMBSLVDATA 0xa
+#define SMLINK_PIN_CTL 0xe
+#define SMBUS_PIN_CTL  0xf
+
+#define SMBUS_TIMEOUT (100*1000*10)
+
+#include <delay.h>
+
+static int smbus_wait_until_ready(unsigned smbus_io_base)
+{
+	unsigned loops = SMBUS_TIMEOUT;
+	unsigned char byte;
+	do {
+		udelay(100);
+		if (--loops == 0)
+			break;
+		byte = inb(smbus_io_base + SMBHSTSTAT);
+	} while(byte & 1);
+	return loops?0:-1;
+}
+
+static int smbus_wait_until_done(unsigned smbus_io_base)
+{
+	unsigned loops = SMBUS_TIMEOUT;
+	unsigned char byte;
+	do {
+	        udelay(100);
+	        if (--loops == 0)
+	               break;
+	        byte = inb(smbus_io_base + SMBHSTSTAT);
+	} while((byte & 1) || (byte & ~((1<<6)|(1<<0))) == 0);
+	return loops?0:-1;
+}
+
+static inline int smbus_wait_until_blk_done(unsigned smbus_io_base)
+{
+	unsigned loops = SMBUS_TIMEOUT;
+	unsigned char byte;
+	do {
+	        udelay(100);
+	        if (--loops == 0)
+	               break;
+	        byte = inb(smbus_io_base + SMBHSTSTAT);
+	} while((byte&(1<<7)) == 0);
+	return loops?0:-1;
+}
+
+static int do_smbus_read_byte(unsigned smbus_io_base, unsigned device, unsigned address)
+{
+	unsigned char global_status_register;
+	unsigned char byte;
+
+	if (smbus_wait_until_ready(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_READY_TIMEOUT;
+	}
+	/* 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 */
+	if (smbus_wait_until_done(smbus_io_base) < 0) {
+		return SMBUS_WAIT_UNTIL_DONE_TIMEOUT;
+	}
+
+	global_status_register = inb(smbus_io_base + SMBHSTSTAT);
+
+	/* Ignore the In Use Status... */
+	global_status_register &= ~(3 << 5);
+
+	/* read results of transaction */
+	byte = inb(smbus_io_base + SMBHSTDAT0);
+	if (global_status_register != (1 << 1)) {
+		return SMBUS_ERROR;
+	}
+	return byte;
+}
+