Hello list,
inside the automatic U-Boot patch tracking system a new ticket [DNX#2006081142000072] was created:
<snip>
tsi108 on chip i2c support.
The i2c Interface provides a master-only, serial interface that can be used for initializing Tsi108/Tsi109 registers from an EEPROM after a device reset.
Signed-off-by: Alexandre Bounine alexandreb@tundra.com Signed-off-by: Roy Zang tie-fei.zang@freescale.com
drivers/tsi108_i2c.c | 295 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 295 insertions(+), 0 deletions(-)
diff --git a/drivers/tsi108_i2c.c b/drivers/tsi108_i2c.c new file mode 100644 index 0000000..bfa10d8 --- /dev/null +++ b/drivers/tsi108_i2c.c @@ -0,0 +1,295 @@ +/*
- (C) Copyright 2004 Tundra Semiconductor Corp.
- Author: Alex Bounine
- See file CREDITS for list of people who contributed to this
- project.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- MA 02111-1307 USA
- */
+#include <common.h> +#include <tsi108.h>
+#if (CONFIG_COMMANDS & CFG_CMD_I2C)
+#define I2C_DELAY 100000 +#undef DEBUG_I2C
+#ifdef DEBUG_I2C +#define DPRINT(x) printf(x) +#else +#define DPRINT(x) +#endif
+/* All functions assume that Tsi108 I2C block is the only master on the bus */ +/* I2C read helper function */
+static int i2c_read_byte(
uint i2c_chan, /* I2C channel number: 0 - main, 1 - SDCSPD */
uchar chip_addr,/* I2C device address on the bus */uint byte_addr, /* Byte address within I2C device */uchar * buffer /* pointer to data buffer */)+{
- u32 temp;
- u32 to_count = I2C_DELAY;
- u32 op_status = TSI108_I2C_TIMEOUT_ERR;
- u32 chan_offset = TSI108_I2C_OFFSET;
- DPRINT(("I2C read_byte() %d 0x%02x 0x%02x\n",
i2c_chan, chip_addr, byte_addr));- 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))) {/* Set device address and operation (read = 0) */temp = (byte_addr << 16) | ((chip_addr & 0x07) << 8) |((chip_addr >> 3) & 0x0F);*(u32 *) (CFG_TSI108_CSR_BASE + chan_offset +I2C_CNTRL1) =
temp;/* Issue the read command* (at this moment all other parameters are 0* (size = 1 byte, lane = 0)*/
</snip>
Your U-Boot support team