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Diffstat (limited to 'drivers/i2c/s3c44b0_i2c.c')
-rw-r--r--drivers/i2c/s3c44b0_i2c.c299
1 files changed, 0 insertions, 299 deletions
diff --git a/drivers/i2c/s3c44b0_i2c.c b/drivers/i2c/s3c44b0_i2c.c
deleted file mode 100644
index 8445e01..0000000
--- a/drivers/i2c/s3c44b0_i2c.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * (C) Copyright 2004
- * DAVE Srl
- * http://www.dave-tech.it
- * http://www.wawnet.biz
- * mailto:info@wawnet.biz
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <command.h>
-#include <asm/hardware.h>
-
-/*
- * Initialization, must be called once on start up, may be called
- * repeatedly to change the speed and slave addresses.
- */
-void i2c_init(int speed, int slaveaddr)
-{
- /*
- setting up I2C support
- */
- unsigned int save_F,save_PF,rIICCON,rPCONA,rPDATA,rPCONF,rPUPF;
-
- save_F = PCONF;
- save_PF = PUPF;
-
- rPCONF = ((save_F & ~(0xF))| 0xa);
- rPUPF = (save_PF | 0x3);
- PCONF = rPCONF; /*PF0:IICSCL, PF1:IICSDA*/
- PUPF = rPUPF; /* Disable pull-up */
-
- /* Configuring pin for WC pin of EEprom */
- rPCONA = PCONA;
- rPCONA &= ~(1<<9);
- PCONA = rPCONA;
-
- rPDATA = PDATA;
- rPDATA &= ~(1<<9);
- PDATA = rPDATA;
-
- /*
- Enable ACK, IICCLK=MCLK/16, enable interrupt
- 75MHz/16/(12+1) = 390625 Hz
- */
- rIICCON=(1<<7)|(0<<6)|(1<<5)|(0xC);
- IICCON = rIICCON;
-
- IICADD = slaveaddr;
-}
-
-/*
- * Probe the given I2C chip address. Returns 0 if a chip responded,
- * not 0 on failure.
- */
-int i2c_probe(uchar chip)
-{
- /*
- not implemented
- */
-
- printf("i2c_probe chip %d\n", (int) chip);
- return -1;
-}
-
-/*
- * Read/Write interface:
- * chip: I2C chip address, range 0..127
- * addr: Memory (register) address within the chip
- * alen: Number of bytes to use for addr (typically 1, 2 for larger
- * memories, 0 for register type devices with only one
- * register)
- * buffer: Where to read/write the data
- * len: How many bytes to read/write
- *
- * Returns: 0 on success, not 0 on failure
- */
-
-#define S3C44B0X_rIIC_INTPEND (1<<4)
-#define S3C44B0X_rIIC_LAST_RECEIV_BIT (1<<0)
-#define S3C44B0X_rIIC_INTERRUPT_ENABLE (1<<5)
-#define S3C44B0_IIC_TIMEOUT 100
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-
- int k, j, temp;
- u32 rIICSTAT;
-
- /*
- send the device offset
- */
-
- rIICSTAT = 0xD0;
- IICSTAT = rIICSTAT;
-
- IICDS = chip; /* this is a write operation... */
-
- rIICSTAT |= (1<<5);
- IICSTAT = rIICSTAT;
-
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- /* wait and check ACK */
- temp = IICSTAT;
- if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
- return -1;
-
- IICDS = addr;
- IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
- /* wait and check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- temp = IICSTAT;
- if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
- return -1;
-
- /*
- now we can start with the read operation...
- */
-
- IICDS = chip | 0x01; /* this is a read operation... */
-
- rIICSTAT = 0x90; /*master recv*/
- rIICSTAT |= (1<<5);
- IICSTAT = rIICSTAT;
-
- IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
- /* wait and check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- temp = IICSTAT;
- if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
- return -1;
-
- for (j=0; j<len-1; j++) {
-
- /*clear pending bit to resume */
-
- temp = IICCON & ~(S3C44B0X_rIIC_INTPEND);
- IICCON = temp;
-
- /* wait and check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
-
- buffer[j] = IICDS; /*save readed data*/
-
- } /*end for(j)*/
-
- /*
- reading the last data
- unset ACK generation
- */
- temp = IICCON & ~(S3C44B0X_rIIC_INTPEND | (1<<7));
- IICCON = temp;
-
- /* wait but NOT check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- buffer[j] = IICDS; /*save readed data*/
-
- rIICSTAT = 0x90; /*master recv*/
-
- /* Write operation Terminate sending STOP */
- IICSTAT = rIICSTAT;
- /*Clear Int Pending Bit to RESUME*/
- temp = IICCON;
- IICCON = temp & (~S3C44B0X_rIIC_INTPEND);
-
- IICCON = IICCON | (1<<7); /*restore ACK generation*/
-
- return 0;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- int j, k;
- u32 rIICSTAT, temp;
-
-
- /*
- send the device offset
- */
-
- rIICSTAT = 0xD0;
- IICSTAT = rIICSTAT;
-
- IICDS = chip; /* this is a write operation... */
-
- rIICSTAT |= (1<<5);
- IICSTAT = rIICSTAT;
-
- IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
- /* wait and check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- temp = IICSTAT;
- if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
- return -1;
-
- IICDS = addr;
- IICCON = IICCON & ~(S3C44B0X_rIIC_INTPEND);
-
- /* wait and check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
- udelay(2000);
- }
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- temp = IICSTAT;
- if ((temp & S3C44B0X_rIIC_LAST_RECEIV_BIT) == S3C44B0X_rIIC_LAST_RECEIV_BIT )
- return -1;
-
- /*
- now we can start with the read write operation
- */
- for (j=0; j<len; j++) {
-
- IICDS = buffer[j]; /*prerare data to write*/
-
- /*clear pending bit to resume*/
-
- temp = IICCON & ~(S3C44B0X_rIIC_INTPEND);
- IICCON = temp;
-
- /* wait but NOT check ACK */
- for(k=0; k<S3C44B0_IIC_TIMEOUT; k++) {
- temp = IICCON;
- if( (temp & S3C44B0X_rIIC_INTPEND) == S3C44B0X_rIIC_INTPEND)
- break;
-
- udelay(2000);
- }
-
- if (k==S3C44B0_IIC_TIMEOUT)
- return -1;
-
- } /* end for(j) */
-
- /* sending stop to terminate */
- rIICSTAT = 0xD0; /*master send*/
- IICSTAT = rIICSTAT;
- /*Clear Int Pending Bit to RESUME*/
- temp = IICCON;
- IICCON = temp & (~S3C44B0X_rIIC_INTPEND);
-
- return 0;
-}
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