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Diffstat (limited to 'board/eltec/elppc/mpc107_i2c.c')
-rw-r--r--board/eltec/elppc/mpc107_i2c.c304
1 files changed, 0 insertions, 304 deletions
diff --git a/board/eltec/elppc/mpc107_i2c.c b/board/eltec/elppc/mpc107_i2c.c
deleted file mode 100644
index 4f95703e14..0000000000
--- a/board/eltec/elppc/mpc107_i2c.c
+++ /dev/null
@@ -1,304 +0,0 @@
-/*
- * (C) Copyright 2002 ELTEC Elektronik AG
- * Frank Gottschling <fgottschling@eltec.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/* includes */
-#include <common.h>
-#include "srom.h"
-
-/* locals */
-static unsigned long mpc107_eumb_addr = 0;
-
-/*----------------------------------------------------------------------------*/
-
-/*
- * calculate checksum for ELTEC revision srom
- */
-unsigned long el_srom_checksum (ptr, size)
-register unsigned char *ptr;
-unsigned long size;
-{
- u_long f, accu = 0;
- u_int i;
- u_char byte;
-
- for (; size; size--)
- {
- byte = *ptr++;
- for (i = 8; i; i--)
- {
- f = ((byte & 1) ^ (accu & 1)) ? 0x84083001 : 0;
- accu >>= 1; accu ^= f;
- byte >>= 1;
- }
- }
- return(accu);
-}
-
-/*----------------------------------------------------------------------------*/
-
-static int mpc107_i2c_wait ( unsigned long timeout )
-{
- unsigned long x;
-
- while (((x = in32r(MPC107_I2CSR)) & 0x82) != 0x82)
- {
- if (!timeout--)
- return -1;
- }
-
- if (x & 0x10)
- {
- return -1;
- }
- out32r(MPC107_I2CSR, 0);
-
- return 0;
-}
-
-/*----------------------------------------------------------------------------*/
-
-static int mpc107_i2c_wait_idle ( unsigned long timeout )
-{
- while (in32r(MPC107_I2CSR) & 0x20)
- {
- if (!timeout--)
- return -1;
- }
- return 0;
-}
-
-
-/*----------------------------------------------------------------------------*/
-
-int mpc107_i2c_read_byte (
- unsigned char device,
- unsigned char block,
- unsigned char offset )
-{
- unsigned long timeout = MPC107_I2C_TIMEOUT;
- int data;
-
- if (!mpc107_eumb_addr)
- return -6;
-
- mpc107_i2c_wait_idle (timeout);
-
- /* Start with MEN */
- out32r(MPC107_I2CCR, 0x80);
-
- /* Start as master */
- out32r(MPC107_I2CCR, 0xB0);
- out32r(MPC107_I2CDR, (0xA0 | device | block));
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_read Error 1\n");
- return -2;
- }
-
- if (in32r(MPC107_I2CSR)&0x1)
- {
- /* Generate STOP condition; device busy or not existing */
- out32r(MPC107_I2CCR, 0x80);
- return -1;
- }
-
- /* Data address */
- out32r(MPC107_I2CDR, offset);
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_read Error 2\n");
- return -3;
- }
-
- /* Switch to read - restart */
- out32r(MPC107_I2CCR, 0xB4);
- out32r(MPC107_I2CDR, (0xA1 | device | block));
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_read Error 3\n");
- return -4;
- }
-
- out32r(MPC107_I2CCR, 0xA8); /* no ACK */
- in32r(MPC107_I2CDR);
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_read Error 4\n");
- return -5;
- }
- /* Generate STOP condition */
- out32r(MPC107_I2CCR, 0x88);
-
- /* read */
- data = in32r(MPC107_I2CDR);
-
- return (data);
-}
-
-/*----------------------------------------------------------------------------*/
-
-int mpc107_i2c_write_byte (
- unsigned char device,
- unsigned char block,
- unsigned char offset,
- unsigned char val )
-{
-
- unsigned long timeout = MPC107_I2C_TIMEOUT;
-
- if (!mpc107_eumb_addr)
- return -6;
-
- mpc107_i2c_wait_idle(timeout);
-
- /* Start with MEN */
- out32r(MPC107_I2CCR, 0x80);
-
- /* Start as master */
- out32r(MPC107_I2CCR, 0xB0);
- out32r(MPC107_I2CDR, (0xA0 | device | block));
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_write Error 1\n");
- return -1;
- }
-
- /* Data address */
- out32r(MPC107_I2CDR, offset);
-
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_write Error 2\n");
- return -1;
- }
-
- /* Write */
- out32r(MPC107_I2CDR, val);
- if (mpc107_i2c_wait(timeout) < 0)
- {
- printf("mpc107_i2c_write Error 3\n");
- return -1;
- }
-
- /* Generate Stop Condition */
- out32r(MPC107_I2CCR, 0x80);
-
- /* Return ACK or no ACK */
- return (in32r(MPC107_I2CSR) & 0x01);
-}
-
-/*----------------------------------------------------------------------------*/
-
-int mpc107_srom_load (
- unsigned char addr,
- unsigned char *pBuf,
- int cnt,
- unsigned char device,
- unsigned char block )
-{
- register int i;
- int val;
- int timeout;
-
- for (i = 0; i < cnt; i++)
- {
- timeout=100;
- do
- {
- val = mpc107_i2c_read_byte (device, block, addr);
- if (val < -1)
- {
- printf("i2c_read_error %d at dev %x block %x addr %x\n",
- val, device, block, addr);
- return -1;
- }
- else if (timeout==0)
- {
- printf ("i2c_read_error: timeout at dev %x block %x addr %x\n",
- device, block, addr);
- return -1;
- }
- timeout--;
- } while (val == -1); /* if no ack: try again! */
-
- *pBuf++ = (unsigned char)val;
- addr++;
-
- if ((addr == 0) && (i != cnt-1)) /* is it the same block ? */
- {
- if (block == FIRST_BLOCK)
- block = SECOND_BLOCK;
- else
- {
- printf ("ic2_read_error: read beyond 2. block !\n");
- return -1;
- }
- }
- }
- udelay(100000);
- return (cnt);
-}
-
-/*----------------------------------------------------------------------------*/
-
-int mpc107_srom_store (
- unsigned char addr,
- unsigned char *pBuf,
- int cnt,
- unsigned char device,
- unsigned char block )
-{
- register int i;
-
- for (i = 0; i < cnt; i++)
- {
- while (mpc107_i2c_write_byte (device,block,addr,*pBuf) == 1);
- addr++;
- pBuf++;
-
- if ((addr == 0) && (i != cnt-1)) /* is it the same block ? */
- {
- if (block == FIRST_BLOCK)
- block = SECOND_BLOCK;
- else
- {
- printf ("ic2_write_error: write beyond 2. block !\n");
- return -1;
- }
- }
- }
- udelay(100000);
- return(cnt);
-}
-
-/*----------------------------------------------------------------------------*/
-
-int mpc107_i2c_init ( unsigned long eumb_addr, unsigned long divider )
-{
- unsigned long x;
-
- if (eumb_addr)
- mpc107_eumb_addr = eumb_addr;
- else
- return -1;
-
- /* Set I2C clock */
- x = in32r(MPC107_I2CFDR) & 0xffffff00;
- out32r(MPC107_I2CFDR, (x | divider));
-
- /* Clear arbitration */
- out32r(MPC107_I2CSR, 0);
-
- return mpc107_eumb_addr;
-}
-
-/*----------------------------------------------------------------------------*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 13:11:56 +0000