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-rw-r--r--c/src/lib/libbsp/powerpc/mvme5500/GT64260/GT64260TWSI.c214
1 files changed, 0 insertions, 214 deletions
diff --git a/c/src/lib/libbsp/powerpc/mvme5500/GT64260/GT64260TWSI.c b/c/src/lib/libbsp/powerpc/mvme5500/GT64260/GT64260TWSI.c
deleted file mode 100644
index 6b5b46e511..0000000000
--- a/c/src/lib/libbsp/powerpc/mvme5500/GT64260/GT64260TWSI.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Two-Wire Serial Interface (TWSI) support for the GT64260
- */
-
-/*
- * Copyright (c) 2004, Brookhaven National Laboratory and
- * Shuchen Kate Feng <feng1@bnl.gov>
- * All rights reserved.
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution.
- *
- * See section 24:TWSI interface of "the GT-64260B System Controller
- * for powerPc Processors Data Sheet".
- *
- * For full TWSI protocol description look in Philips Semiconductor
- * TWSI spec.
- *
- * We need it to read out I2C devices used for the MVME5500
- * (eg. the memory SPD and VPD).
- */
-
-#include <libcpu/spr.h> /*registers.h included here for rtems_bsp_delay()*/
-#include <libcpu/io.h>
-#include <rtems/bspIo.h>
-
-#include "bsp/gtreg.h"
-#include "bsp/GT64260TWSI.h"
-
-#define MAX_LOOP 100
-
-#define TWSI_DEBUG 0
-
-static int TWSI_initFlg = 0; /* TWSI Initialization Flag */
-
-void GT64260TWSIinit(void)
-{
- if ( !TWSI_initFlg ) {
-#if TWSI_DEBUG
- printk("GT64260TWSIinit(");
-#endif
- outl( 0, TWSI_SFT_RST); /* soft reset */
- rtems_bsp_delay(1000);
-
- /* See 24.2.5 : Assume bus speed is 133MHZ
- * Try to be close to the default frequency : 62.5KHZ
- * value 0x2c: 69.27 KHz TWSI bus clock
- */
- outl(0x2c, TWSI_BAUDE_RATE);
- rtems_bsp_delay(1000);
-
- /* Set Acknowledge and enable TWSI in the Control register */
- outl(0x44, TWSI_CTRL);
- rtems_bsp_delay(4000);
- TWSI_initFlg = 1;
-#if TWSI_DEBUG
- printk(")\n");
-#endif
- }
-}
-
-/* return the interrupt flag */
-static int GT64260TWSIintFlag(void)
-{
- unsigned int loop;
-
- for (loop = 0; loop < MAX_LOOP; loop++ ) {
- /* Return 1 if the interrupt flag is set */
- if (inl(TWSI_CTRL) & TWSI_INTFLG)
- return(1);
- rtems_bsp_delay(1000);
- }
- return(0);
-}
-
-int GT64260TWSIstop(void)
-{
-
-#if TWSI_DEBUG
- printk("GT64260TWSIstop(");
-#endif
-
- outl((inl(TWSI_CTRL) | TWSI_STOP), TWSI_CTRL);
- rtems_bsp_delay(1000);
-
- /* Check if interrupt flag bit is set*/
- if (GT64260TWSIintFlag()) {
- outl((inl( TWSI_CTRL) & ~TWSI_INTFLG), TWSI_CTRL);
- rtems_bsp_delay(1000);
-#if TWSI_DEBUG
- printk(")\n");
-#endif
- return(0);
- }
-#if TWSI_DEBUG
- printk("NoIntFlag\n");
-#endif
- return(-1);
-}
-
-int GT64260TWSIstart(void)
-{
- unsigned int loop;
- unsigned int status;
-
-#if TWSI_DEBUG
- printk("GT64260TWSIstart(");
-#endif
- /* Initialize the TWSI interface */
- GT64260TWSIinit();
-
- /* set the start bit */
- outl((TWSI_START | TWSI_TWSIEN), TWSI_CTRL);
- rtems_bsp_delay(1000);
-
- if (GT64260TWSIintFlag()) {
- /* Check for completion of START sequence */
- for (loop = 0; loop<MAX_LOOP; loop++ ) {
- /* if (start condition transmitted) ||
- * (repeated start condition transmitted )
- */
- if (((status= inl( TWSI_STATUS)) == 8) || (status == 0x10)) {
-#if TWSI_DEBUG
- printk(")");
-#endif
- return(0);
- }
- rtems_bsp_delay(1000);
- }
- }
- /* if loop ends or intFlag ==0 */
- GT64260TWSIstop();
- return(-1);
-}
-
-int GT64260TWSIread(unsigned char * pData, int lastByte)
-{
- unsigned int loop;
-
-#if TWSI_DEBUG
- printk("GT64260TWSIread(");
-#endif
- /* Clear INTFLG and set ACK and ENABLE bits */
- outl((TWSI_ACK | TWSI_TWSIEN), TWSI_CTRL);
- rtems_bsp_delay(1000);
-
- if (GT64260TWSIintFlag()) {
- for (loop = 0; loop< MAX_LOOP; loop++) {
- /* if Master received read data, acknowledge transmitted */
- if ( (inl( TWSI_STATUS) == 0x50)) {
- *pData = (unsigned char) inl( TWSI_DATA);
- rtems_bsp_delay(1500);
-
- /* Clear INTFLAG and set Enable bit only */
- if (lastByte)
- outl(TWSI_TWSIEN, TWSI_CTRL);
- rtems_bsp_delay(1500);
-#if TWSI_DEBUG
- printk(")\n");
-#endif
- return(0);
- }
- rtems_bsp_delay(1000);
- } /* end for */
- }
- /* if loop ends or intFlag ==0 */
- GT64260TWSIstop();
- return(-1);
-}
-
-/* do a TWSI write cycle on the TWSI bus*/
-int GT64260TWSIwrite(unsigned char Data)
-{
- unsigned int loop;
- unsigned int status;
-
-#if TWSI_DEBUG
- printk("GT64260TWSIwrite(");
-#endif
- /* Write data into the TWSI data register */
- outl(((unsigned int) Data), TWSI_DATA);
- rtems_bsp_delay(1000);
-
- /* Clear INTFLG in the control register to drive data onto TWSI bus */
- outl(0, TWSI_CTRL);
- rtems_bsp_delay(1000);
-
- if (GT64260TWSIintFlag() ) {
- for (loop = 0; loop< MAX_LOOP; loop++) {
- rtems_bsp_delay(1000);
- /* if address + write bit transmitted, acknowledge not received */
- if ( (status = inl( TWSI_STATUS)) == 0x20) {
- /* No device responding, generate STOP and return -1 */
- printk("no device responding\n");
- GT64260TWSIstop();
- return(-1);
- }
- /* if (address + write bit transmitted, acknowledge received)
- * (Master transmmitted data byte, acknowledge received)
- * (address + read bit transmitted, acknowledge received)
- */
- if ((status == 0x18)||(status == 0x28)||(status == 0x40)) {
-#if TWSI_DEBUG
- printk(")\n");
-#endif
- return(0);
- }
- rtems_bsp_delay(1000);
- } /* end for */
- }
- printk("No correct status, timeout\n");
- GT64260TWSIstop();
- return(-1);
-}