i2c, omap1510: remove i2c driver
remove omap1510 i2c driver, as there is no board which uses it Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Tom Rini <trini@ti.com> Cc: Jian Zhang <jzhang@ti.com>
This commit is contained in:
Heiko Schocher
parent
0bdffe71fd
commit
85bb251b39
|
|
@ -11,7 +11,6 @@ obj-$(CONFIG_DW_I2C) += designware_i2c.o
|
|||
obj-$(CONFIG_I2C_MVTWSI) += mvtwsi.o
|
||||
obj-$(CONFIG_I2C_MV) += mv_i2c.o
|
||||
obj-$(CONFIG_I2C_MXS) += mxs_i2c.o
|
||||
obj-$(CONFIG_DRIVER_OMAP1510_I2C) += omap1510_i2c.o
|
||||
obj-$(CONFIG_PCA9564_I2C) += pca9564_i2c.o
|
||||
obj-$(CONFIG_DRIVER_S3C24X0_I2C) += s3c24x0_i2c.o
|
||||
obj-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
|
||||
|
|
|
|||
|
|
@ -1,277 +0,0 @@
|
|||
/*
|
||||
* Basic I2C functions
|
||||
*
|
||||
* Copyright (c) 2003 Texas Instruments
|
||||
*
|
||||
* This package is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the license found in the file
|
||||
* named COPYING that should have accompanied this file.
|
||||
*
|
||||
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
||||
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* Author: Jian Zhang jzhang@ti.com, Texas Instruments
|
||||
*
|
||||
* Copyright (c) 2003 Wolfgang Denk, wd@denx.de
|
||||
* Rewritten to fit into the current U-Boot framework
|
||||
*
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
|
||||
static void wait_for_bb (void);
|
||||
static u16 wait_for_pin (void);
|
||||
|
||||
void i2c_init (int speed, int slaveadd)
|
||||
{
|
||||
u16 scl;
|
||||
|
||||
if (inw (I2C_CON) & I2C_CON_EN) {
|
||||
outw (0, I2C_CON);
|
||||
udelay (5000);
|
||||
}
|
||||
|
||||
/* 12MHz I2C module clock */
|
||||
outw (0, I2C_PSC);
|
||||
outw (I2C_CON_EN, I2C_CON);
|
||||
outw (0, I2C_SYSTEST);
|
||||
/* have to enable intrrupts or OMAP i2c module doesn't work */
|
||||
outw (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
|
||||
I2C_IE_NACK_IE | I2C_IE_AL_IE, I2C_IE);
|
||||
scl = (12000000 / 2) / speed - 6;
|
||||
outw (scl, I2C_SCLL);
|
||||
outw (scl, I2C_SCLH);
|
||||
/* own address */
|
||||
outw (slaveadd, I2C_OA);
|
||||
outw (0, I2C_CNT);
|
||||
udelay (1000);
|
||||
}
|
||||
|
||||
static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
|
||||
{
|
||||
int i2c_error = 0;
|
||||
u16 status;
|
||||
|
||||
/* wait until bus not busy */
|
||||
wait_for_bb ();
|
||||
|
||||
/* one byte only */
|
||||
outw (1, I2C_CNT);
|
||||
/* set slave address */
|
||||
outw (devaddr, I2C_SA);
|
||||
/* no stop bit needed here */
|
||||
outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, I2C_CON);
|
||||
|
||||
status = wait_for_pin ();
|
||||
|
||||
if (status & I2C_STAT_XRDY) {
|
||||
/* Important: have to use byte access */
|
||||
*(volatile u8 *) (I2C_DATA) = regoffset;
|
||||
udelay (20000);
|
||||
if (inw (I2C_STAT) & I2C_STAT_NACK) {
|
||||
i2c_error = 1;
|
||||
}
|
||||
} else {
|
||||
i2c_error = 1;
|
||||
}
|
||||
|
||||
if (!i2c_error) {
|
||||
/* free bus, otherwise we can't use a combined transction */
|
||||
outw (0, I2C_CON);
|
||||
while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
|
||||
udelay (10000);
|
||||
/* Have to clear pending interrupt to clear I2C_STAT */
|
||||
inw (I2C_IV);
|
||||
}
|
||||
|
||||
wait_for_bb ();
|
||||
/* set slave address */
|
||||
outw (devaddr, I2C_SA);
|
||||
/* read one byte from slave */
|
||||
outw (1, I2C_CNT);
|
||||
/* need stop bit here */
|
||||
outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP,
|
||||
I2C_CON);
|
||||
|
||||
status = wait_for_pin ();
|
||||
if (status & I2C_STAT_RRDY) {
|
||||
*value = inw (I2C_DATA);
|
||||
udelay (20000);
|
||||
} else {
|
||||
i2c_error = 1;
|
||||
}
|
||||
|
||||
if (!i2c_error) {
|
||||
outw (I2C_CON_EN, I2C_CON);
|
||||
while (inw (I2C_STAT)
|
||||
|| (inw (I2C_CON) & I2C_CON_MST)) {
|
||||
udelay (10000);
|
||||
inw (I2C_IV);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return i2c_error;
|
||||
}
|
||||
|
||||
static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
|
||||
{
|
||||
int i2c_error = 0;
|
||||
u16 status;
|
||||
|
||||
/* wait until bus not busy */
|
||||
wait_for_bb ();
|
||||
|
||||
/* two bytes */
|
||||
outw (2, I2C_CNT);
|
||||
/* set slave address */
|
||||
outw (devaddr, I2C_SA);
|
||||
/* stop bit needed here */
|
||||
outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
|
||||
I2C_CON_STP, I2C_CON);
|
||||
|
||||
/* wait until state change */
|
||||
status = wait_for_pin ();
|
||||
|
||||
if (status & I2C_STAT_XRDY) {
|
||||
/* send out two bytes */
|
||||
outw ((value << 8) + regoffset, I2C_DATA);
|
||||
/* must have enough delay to allow BB bit to go low */
|
||||
udelay (30000);
|
||||
if (inw (I2C_STAT) & I2C_STAT_NACK) {
|
||||
i2c_error = 1;
|
||||
}
|
||||
} else {
|
||||
i2c_error = 1;
|
||||
}
|
||||
|
||||
if (!i2c_error) {
|
||||
outw (I2C_CON_EN, I2C_CON);
|
||||
while (inw (I2C_STAT) || (inw (I2C_CON) & I2C_CON_MST)) {
|
||||
udelay (1000);
|
||||
/* have to read to clear intrrupt */
|
||||
inw (I2C_IV);
|
||||
}
|
||||
}
|
||||
|
||||
return i2c_error;
|
||||
}
|
||||
|
||||
int i2c_probe (uchar chip)
|
||||
{
|
||||
int res = 1;
|
||||
|
||||
if (chip == inw (I2C_OA)) {
|
||||
return res;
|
||||
}
|
||||
|
||||
/* wait until bus not busy */
|
||||
wait_for_bb ();
|
||||
|
||||
/* try to read one byte */
|
||||
outw (1, I2C_CNT);
|
||||
/* set slave address */
|
||||
outw (chip, I2C_SA);
|
||||
/* stop bit needed here */
|
||||
outw (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_STP, I2C_CON);
|
||||
/* enough delay for the NACK bit set */
|
||||
udelay (2000);
|
||||
if (!(inw (I2C_STAT) & I2C_STAT_NACK)) {
|
||||
res = 0;
|
||||
} else {
|
||||
outw (inw (I2C_CON) | I2C_CON_STP, I2C_CON);
|
||||
udelay (20);
|
||||
wait_for_bb ();
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (alen > 1) {
|
||||
printf ("I2C read: addr len %d not supported\n", alen);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (addr + len > 256) {
|
||||
printf ("I2C read: address out of range\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
if (i2c_read_byte (chip, addr + i, &buffer[i])) {
|
||||
printf ("I2C read: I/O error\n");
|
||||
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (alen > 1) {
|
||||
printf ("I2C read: addr len %d not supported\n", alen);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (addr + len > 256) {
|
||||
printf ("I2C read: address out of range\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
for (i = 0; i < len; i++) {
|
||||
if (i2c_write_byte (chip, addr + i, buffer[i])) {
|
||||
printf ("I2C read: I/O error\n");
|
||||
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void wait_for_bb (void)
|
||||
{
|
||||
int timeout = 10;
|
||||
|
||||
while ((inw (I2C_STAT) & I2C_STAT_BB) && timeout--) {
|
||||
inw (I2C_IV);
|
||||
udelay (1000);
|
||||
}
|
||||
|
||||
if (timeout <= 0) {
|
||||
printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
|
||||
inw (I2C_STAT));
|
||||
}
|
||||
}
|
||||
|
||||
static u16 wait_for_pin (void)
|
||||
{
|
||||
u16 status, iv;
|
||||
int timeout = 10;
|
||||
|
||||
do {
|
||||
udelay (1000);
|
||||
status = inw (I2C_STAT);
|
||||
iv = inw (I2C_IV);
|
||||
} while (!iv &&
|
||||
!(status &
|
||||
(I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
|
||||
I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
|
||||
I2C_STAT_AL)) && timeout--);
|
||||
|
||||
if (timeout <= 0) {
|
||||
printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
|
||||
inw (I2C_STAT));
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
Loading…
Reference in New Issue