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path: root/drivers/tsi108_i2c.c
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Diffstat (limited to 'drivers/tsi108_i2c.c')
-rw-r--r--drivers/tsi108_i2c.c60
1 files changed, 29 insertions, 31 deletions
diff --git a/drivers/tsi108_i2c.c b/drivers/tsi108_i2c.c
index 08e5e3b..c100cb8 100644
--- a/drivers/tsi108_i2c.c
+++ b/drivers/tsi108_i2c.c
@@ -23,19 +23,18 @@
*/
#include <config.h>
+#include <common.h>
#ifdef CONFIG_TSI108_I2C
-
-#include <common.h>
#include <tsi108.h>
#if (CONFIG_COMMANDS & CFG_CMD_I2C)
-#define I2C_DELAY 100000
+#define I2C_DELAY 100000
#undef DEBUG_I2C
#ifdef DEBUG_I2C
-#define DPRINT(x) printf(x)
+#define DPRINT(x) printf (x)
#else
#define DPRINT(x)
#endif
@@ -43,7 +42,7 @@
/* All functions assume that Tsi108 I2C block is the only master on the bus */
/* I2C read helper function */
-static int i2c_read_byte(
+static int i2c_read_byte (
uint i2c_chan, /* I2C channel number: 0 - main, 1 - SDC SPD */
uchar chip_addr,/* I2C device address on the bus */
uint byte_addr, /* Byte address within I2C device */
@@ -55,19 +54,17 @@ static int i2c_read_byte(
u32 op_status = TSI108_I2C_TIMEOUT_ERR;
u32 chan_offset = TSI108_I2C_OFFSET;
- DPRINT(("I2C read_byte() %d 0x%02x 0x%02x\n",
+ DPRINT (("I2C read_byte() %d 0x%02x 0x%02x\n",
i2c_chan, chip_addr, byte_addr));
- if (0 != i2c_chan) {
+ if (0 != i2c_chan)
chan_offset = TSI108_I2C_SDRAM_OFFSET;
- }
/* Check if I2C operation is in progress */
temp = *(u32 *) (CFG_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2);
if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS |
- I2C_CNTRL2_START))
- ) {
+ I2C_CNTRL2_START))) {
/* Set device address and operation (read = 0) */
temp = (byte_addr << 16) | ((chip_addr & 0x07) << 8) |
((chip_addr >> 3) & 0x0F);
@@ -75,7 +72,7 @@ static int i2c_read_byte(
temp;
/* Issue the read command
- * (at this moment all other parameters are 0
+ * (at this moment all other parameters are 0
* (size = 1 byte, lane = 0)
*/
@@ -108,7 +105,7 @@ static int i2c_read_byte(
/* report HW error */
op_status = TSI108_I2C_IF_ERROR;
- DPRINT(("I2C HW error reported: 0x%02x\n", temp));
+ DPRINT (("I2C HW error reported: 0x%02x\n", temp));
}
break;
@@ -117,20 +114,20 @@ static int i2c_read_byte(
} else {
op_status = TSI108_I2C_IF_BUSY;
- DPRINT(("I2C Transaction start failed: 0x%02x\n", temp));
+ DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
}
- DPRINT(("I2C read_byte() status: 0x%02x\n", op_status));
+ DPRINT (("I2C read_byte() status: 0x%02x\n", op_status));
return op_status;
}
-/*
+/*
* I2C Read interface as defined in "include/i2c.h" :
* chip_addr: I2C chip address, range 0..127
* (to read from SPD channel EEPROM use (0xD0 ... 0xD7)
* NOTE: The bit 7 in the chip_addr serves as a channel select.
* This hack is for enabling "isdram" command on Tsi108 boards
- * without changes to common code. Used for I2C reads only.
+ * without changes to common code. Used for I2C reads only.
* byte_addr: Memory or 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
@@ -141,7 +138,8 @@ static int i2c_read_byte(
* Returns: 0 on success, not 0 on failure
*/
-int i2c_read(uchar chip_addr, uint byte_addr, int alen, uchar * buffer, int len)
+int i2c_read (uchar chip_addr, uint byte_addr, int alen,
+ uchar * buffer, int len)
{
u32 op_status = TSI108_I2C_PARAM_ERR;
u32 i2c_if = 0;
@@ -159,20 +157,20 @@ int i2c_read(uchar chip_addr, uint byte_addr, int alen, uchar * buffer, int len)
buffer++);
if (TSI108_I2C_SUCCESS != op_status) {
- DPRINT(("I2C read_byte() failed: 0x%02x (%d left)\n", op_status, len));
+ DPRINT (("I2C read_byte() failed: 0x%02x (%d left)\n", op_status, len));
break;
}
}
}
- DPRINT(("I2C read() status: 0x%02x\n", op_status));
+ DPRINT (("I2C read() status: 0x%02x\n", op_status));
return op_status;
}
/* I2C write helper function */
-static int i2c_write_byte(uchar chip_addr,/* I2C device address on the bus */
+static int i2c_write_byte (uchar chip_addr,/* I2C device address on the bus */
uint byte_addr, /* Byte address within I2C device */
uchar * buffer /* pointer to data buffer */
)
@@ -210,7 +208,7 @@ static int i2c_write_byte(uchar chip_addr,/* I2C device address on the bus */
/* Wait until operation completed */
do {
- // Read I2C operation status
+ /* Read I2C operation status */
temp =
*(u32 *) (CFG_TSI108_CSR_BASE + TSI108_I2C_OFFSET +
I2C_CNTRL2);
@@ -227,7 +225,7 @@ static int i2c_write_byte(uchar chip_addr,/* I2C device address on the bus */
/* report detected HW error */
op_status = TSI108_I2C_IF_ERROR;
- DPRINT(("I2C HW error reported: 0x%02x\n", temp));
+ DPRINT (("I2C HW error reported: 0x%02x\n", temp));
}
break;
@@ -237,13 +235,13 @@ static int i2c_write_byte(uchar chip_addr,/* I2C device address on the bus */
} else {
op_status = TSI108_I2C_IF_BUSY;
- DPRINT(("I2C Transaction start failed: 0x%02x\n", temp));
+ DPRINT (("I2C Transaction start failed: 0x%02x\n", temp));
}
return op_status;
}
-/*
+/*
* I2C Write interface as defined in "include/i2c.h" :
* chip_addr: I2C chip address, range 0..127
* byte_addr: Memory or register address within the chip
@@ -256,7 +254,7 @@ static int i2c_write_byte(uchar chip_addr,/* I2C device address on the bus */
* Returns: 0 on success, not 0 on failure
*/
-int i2c_write(uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
+int i2c_write (uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
int len)
{
u32 op_status = TSI108_I2C_PARAM_ERR;
@@ -265,10 +263,10 @@ int i2c_write(uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) {
while (len--) {
op_status =
- i2c_write_byte(chip_addr, byte_addr++, buffer++);
+ i2c_write_byte (chip_addr, byte_addr++, buffer++);
if (TSI108_I2C_SUCCESS != op_status) {
- DPRINT(("I2C write_byte() failed: 0x%02x (%d left)\n", op_status, len));
+ DPRINT (("I2C write_byte() failed: 0x%02x (%d left)\n", op_status, len));
break;
}
@@ -278,13 +276,13 @@ int i2c_write(uchar chip_addr, uint byte_addr, int alen, uchar * buffer,
return op_status;
}
-/*
+/*
* I2C interface function as defined in "include/i2c.h".
* Probe the given I2C chip address by reading single byte from offset 0.
* Returns 0 if a chip responded, not 0 on failure.
*/
-int i2c_probe(uchar chip)
+int i2c_probe (uchar chip)
{
u32 tmp;
@@ -293,8 +291,8 @@ int i2c_probe(uchar chip)
* The Tsi108 HW doesn't support sending just the chip address
* and checkong for an <ACK> back.
*/
- return i2c_read(chip, 0, 1, (char *)&tmp, 1);
+ return i2c_read (chip, 0, 1, (char *)&tmp, 1);
}
-#endif /* (CONFIG_COMMANDS & CFG_CMD_I2C) */
+#endif /* (CONFIG_COMMANDS & CFG_CMD_I2C) */
#endif /* CONFIG_TSI108_I2C */
generated by cgit v1.1 at 2024-12-14 01:34:45 +0000