diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c b/drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c new file mode 100644 index 000000000000..34434557ef65 --- /dev/null +++ b/drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c @@ -0,0 +1,850 @@ +/* + * mxl111sf-i2c.c - driver for the MaxLinear MXL111SF + * + * Copyright (C) 2010 Michael Krufky <mkrufky@kernellabs.com> + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "mxl111sf-i2c.h" +#include "mxl111sf.h" + +/* SW-I2C ----------------------------------------------------------------- */ + +#define SW_I2C_ADDR 0x1a +#define SW_I2C_EN 0x02 +#define SW_SCL_OUT 0x04 +#define SW_SDA_OUT 0x08 +#define SW_SDA_IN 0x04 + +#define SW_I2C_BUSY_ADDR 0x2f +#define SW_I2C_BUSY 0x02 + +static int mxl111sf_i2c_bitbang_sendbyte(struct mxl111sf_state *state, + u8 byte) +{ + int i, ret; + u8 data = 0; + + mxl_i2c("(0x%02x)", byte); + + ret = mxl111sf_read_reg(state, SW_I2C_BUSY_ADDR, &data); + if (mxl_fail(ret)) + goto fail; + + for (i = 0; i < 8; i++) { + + data = (byte & (0x80 >> i)) ? SW_SDA_OUT : 0; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | data); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | data | SW_SCL_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | data); + if (mxl_fail(ret)) + goto fail; + } + + /* last bit was 0 so we need to release SDA */ + if (!(byte & 1)) { + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + } + + /* CLK high for ACK readback */ + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_read_reg(state, SW_I2C_BUSY_ADDR, &data); + if (mxl_fail(ret)) + goto fail; + + /* drop the CLK after getting ACK, SDA will go high right away */ + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + if (data & SW_SDA_IN) + ret = -EIO; +fail: + return ret; +} + +static int mxl111sf_i2c_bitbang_recvbyte(struct mxl111sf_state *state, + u8 *pbyte) +{ + int i, ret; + u8 byte = 0; + u8 data = 0; + + mxl_i2c("()"); + + *pbyte = 0; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + for (i = 0; i < 8; i++) { + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | + SW_SCL_OUT | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_read_reg(state, SW_I2C_BUSY_ADDR, &data); + if (mxl_fail(ret)) + goto fail; + + if (data & SW_SDA_IN) + byte |= (0x80 >> i); + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + } + *pbyte = byte; +fail: + return ret; +} + +static int mxl111sf_i2c_start(struct mxl111sf_state *state) +{ + int ret; + + mxl_i2c("()"); + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN); /* start */ + mxl_fail(ret); +fail: + return ret; +} + +static int mxl111sf_i2c_stop(struct mxl111sf_state *state) +{ + int ret; + + mxl_i2c("()"); + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN); /* stop */ + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_SCL_OUT | SW_SDA_OUT); + mxl_fail(ret); +fail: + return ret; +} + +static int mxl111sf_i2c_ack(struct mxl111sf_state *state) +{ + int ret; + u8 b = 0; + + mxl_i2c("()"); + + ret = mxl111sf_read_reg(state, SW_I2C_BUSY_ADDR, &b); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN); + if (mxl_fail(ret)) + goto fail; + + /* pull SDA low */ + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + mxl_fail(ret); +fail: + return ret; +} + +static int mxl111sf_i2c_nack(struct mxl111sf_state *state) +{ + int ret; + + mxl_i2c("()"); + + /* SDA high to signal last byte read from slave */ + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SCL_OUT | SW_SDA_OUT); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_write_reg(state, SW_I2C_ADDR, + 0x10 | SW_I2C_EN | SW_SDA_OUT); + mxl_fail(ret); +fail: + return ret; +} + +/* ------------------------------------------------------------------------ */ + +static int mxl111sf_i2c_sw_xfer_msg(struct mxl111sf_state *state, + struct i2c_msg *msg) +{ + int i, ret; + + mxl_i2c("()"); + + if (msg->flags & I2C_M_RD) { + + ret = mxl111sf_i2c_start(state); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_i2c_bitbang_sendbyte(state, + (msg->addr << 1) | 0x01); + if (mxl_fail(ret)) { + mxl111sf_i2c_stop(state); + goto fail; + } + + for (i = 0; i < msg->len; i++) { + ret = mxl111sf_i2c_bitbang_recvbyte(state, + &msg->buf[i]); + if (mxl_fail(ret)) { + mxl111sf_i2c_stop(state); + goto fail; + } + + if (i < msg->len - 1) + mxl111sf_i2c_ack(state); + } + + mxl111sf_i2c_nack(state); + + ret = mxl111sf_i2c_stop(state); + if (mxl_fail(ret)) + goto fail; + + } else { + + ret = mxl111sf_i2c_start(state); + if (mxl_fail(ret)) + goto fail; + + ret = mxl111sf_i2c_bitbang_sendbyte(state, + (msg->addr << 1) & 0xfe); + if (mxl_fail(ret)) { + mxl111sf_i2c_stop(state); + goto fail; + } + + for (i = 0; i < msg->len; i++) { + ret = mxl111sf_i2c_bitbang_sendbyte(state, + msg->buf[i]); + if (mxl_fail(ret)) { + mxl111sf_i2c_stop(state); + goto fail; + } + } + + /* FIXME: we only want to do this on the last transaction */ + mxl111sf_i2c_stop(state); + } +fail: + return ret; +} + +/* HW-I2C ----------------------------------------------------------------- */ + +#define USB_WRITE_I2C_CMD 0x99 +#define USB_READ_I2C_CMD 0xdd +#define USB_END_I2C_CMD 0xfe + +#define USB_WRITE_I2C_CMD_LEN 26 +#define USB_READ_I2C_CMD_LEN 24 + +#define I2C_MUX_REG 0x30 +#define I2C_CONTROL_REG 0x00 +#define I2C_SLAVE_ADDR_REG 0x08 +#define I2C_DATA_REG 0x0c +#define I2C_INT_STATUS_REG 0x10 + +static int mxl111sf_i2c_send_data(struct mxl111sf_state *state, + u8 index, u8 *wdata) +{ + int ret = mxl111sf_ctrl_msg(state->d, wdata[0], + &wdata[1], 25, NULL, 0); + mxl_fail(ret); + + return ret; +} + +static int mxl111sf_i2c_get_data(struct mxl111sf_state *state, + u8 index, u8 *wdata, u8 *rdata) +{ + int ret = mxl111sf_ctrl_msg(state->d, wdata[0], + &wdata[1], 25, rdata, 24); + mxl_fail(ret); + + return ret; +} + +static u8 mxl111sf_i2c_check_status(struct mxl111sf_state *state) +{ + u8 status = 0; + u8 buf[26]; + + mxl_i2c_adv("()"); + + buf[0] = USB_READ_I2C_CMD; + buf[1] = 0x00; + + buf[2] = I2C_INT_STATUS_REG; + buf[3] = 0x00; + buf[4] = 0x00; + + buf[5] = USB_END_I2C_CMD; + + mxl111sf_i2c_get_data(state, 0, buf, buf); + + if (buf[1] & 0x04) + status = 1; + + return status; +} + +static u8 mxl111sf_i2c_check_fifo(struct mxl111sf_state *state) +{ + u8 status = 0; + u8 buf[26]; + + mxl_i2c("()"); + + buf[0] = USB_READ_I2C_CMD; + buf[1] = 0x00; + + buf[2] = I2C_MUX_REG; + buf[3] = 0x00; + buf[4] = 0x00; + + buf[5] = I2C_INT_STATUS_REG; + buf[6] = 0x00; + buf[7] = 0x00; + buf[8] = USB_END_I2C_CMD; + + mxl111sf_i2c_get_data(state, 0, buf, buf); + + if (0x08 == (buf[1] & 0x08)) + status = 1; + + if ((buf[5] & 0x02) == 0x02) + mxl_i2c("(buf[5] & 0x02) == 0x02"); /* FIXME */ + + return status; +} + +static int mxl111sf_i2c_readagain(struct mxl111sf_state *state, + u8 count, u8 *rbuf) +{ + u8 i2c_w_data[26]; + u8 i2c_r_data[24]; + u8 i = 0; + u8 fifo_status = 0; + int status = 0; + + mxl_i2c("read %d bytes", count); + + while ((fifo_status == 0) && (i++ < 5)) + fifo_status = mxl111sf_i2c_check_fifo(state); + + i2c_w_data[0] = 0xDD; + i2c_w_data[1] = 0x00; + + for (i = 2; i < 26; i++) + i2c_w_data[i] = 0xFE; + + for (i = 0; i < count; i++) { + i2c_w_data[2+(i*3)] = 0x0C; + i2c_w_data[3+(i*3)] = 0x00; + i2c_w_data[4+(i*3)] = 0x00; + } + + mxl111sf_i2c_get_data(state, 0, i2c_w_data, i2c_r_data); + + /* Check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("error!"); + } else { + for (i = 0; i < count; i++) { + rbuf[i] = i2c_r_data[(i*3)+1]; + mxl_i2c("%02x\t %02x", + i2c_r_data[(i*3)+1], + i2c_r_data[(i*3)+2]); + } + + status = 1; + } + + return status; +} + +#define HWI2C400 1 +static int mxl111sf_i2c_hw_xfer_msg(struct mxl111sf_state *state, + struct i2c_msg *msg) +{ + int i, k, ret = 0; + u16 index = 0; + u8 buf[26]; + u8 i2c_r_data[24]; + u16 block_len; + u16 left_over_len; + u8 rd_status[8]; + u8 ret_status; + u8 readbuff[26]; + + mxl_i2c("addr: 0x%02x, read buff len: %d, write buff len: %d", + msg->addr, (msg->flags & I2C_M_RD) ? msg->len : 0, + (!(msg->flags & I2C_M_RD)) ? msg->len : 0); + + for (index = 0; index < 26; index++) + buf[index] = USB_END_I2C_CMD; + + /* command to indicate data payload is destined for I2C interface */ + buf[0] = USB_WRITE_I2C_CMD; + buf[1] = 0x00; + + /* enable I2C interface */ + buf[2] = I2C_MUX_REG; + buf[3] = 0x80; + buf[4] = 0x00; + + /* enable I2C interface */ + buf[5] = I2C_MUX_REG; + buf[6] = 0x81; + buf[7] = 0x00; + + /* set Timeout register on I2C interface */ + buf[8] = 0x14; + buf[9] = 0xff; + buf[10] = 0x00; +#if 0 + /* enable Interrupts on I2C interface */ + buf[8] = 0x24; + buf[9] = 0xF7; + buf[10] = 0x00; +#endif + buf[11] = 0x24; + buf[12] = 0xF7; + buf[13] = 0x00; + + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* write data on I2C bus */ + if (!(msg->flags & I2C_M_RD) && (msg->len > 0)) { + mxl_i2c("%d\t%02x", msg->len, msg->buf[0]); + + /* control register on I2C interface to initialize I2C bus */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x5E; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + + /* I2C Slave device Address */ + buf[5] = I2C_SLAVE_ADDR_REG; + buf[6] = (msg->addr); + buf[7] = 0x00; + buf[8] = USB_END_I2C_CMD; + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* check for slave device status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK writing slave address %02x", + msg->addr); + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x4E; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + /* I2C interface can do I2C operations in block of 8 bytes of + I2C data. calculation to figure out number of blocks of i2c + data required to program */ + block_len = (msg->len / 8); + left_over_len = (msg->len % 8); + index = 0; + + mxl_i2c("block_len %d, left_over_len %d", + block_len, left_over_len); + + for (index = 0; index < block_len; index++) { + for (i = 0; i < 8; i++) { + /* write data on I2C interface */ + buf[2+(i*3)] = I2C_DATA_REG; + buf[3+(i*3)] = msg->buf[(index*8)+i]; + buf[4+(i*3)] = 0x00; + } + + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK writing slave address %02x", + msg->addr); + + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x4E; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + } + + if (left_over_len) { + for (k = 0; k < 26; k++) + buf[k] = USB_END_I2C_CMD; + + buf[0] = 0x99; + buf[1] = 0x00; + + for (i = 0; i < left_over_len; i++) { + buf[2+(i*3)] = I2C_DATA_REG; + buf[3+(i*3)] = msg->buf[(index*8)+i]; + mxl_i2c("index = %d %d data %d", + index, i, msg->buf[(index*8)+i]); + buf[4+(i*3)] = 0x00; + } + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK writing slave address %02x", + msg->addr); + + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x4E; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + } + + /* issue I2C STOP after write */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x4E; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + + } + + /* read data from I2C bus */ + if ((msg->flags & I2C_M_RD) && (msg->len > 0)) { + mxl_i2c("read buf len %d", msg->len); + + /* command to indicate data payload is + destined for I2C interface */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xDF; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + + /* I2C xfer length */ + buf[5] = 0x14; + buf[6] = (msg->len & 0xFF); + buf[7] = 0; + + /* I2C slave device Address */ + buf[8] = I2C_SLAVE_ADDR_REG; + buf[9] = msg->addr; + buf[10] = 0x00; + buf[11] = USB_END_I2C_CMD; + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK reading slave address %02x", + msg->addr); + + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xC7; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + /* I2C interface can do I2C operations in block of 8 bytes of + I2C data. calculation to figure out number of blocks of + i2c data required to program */ + block_len = ((msg->len) / 8); + left_over_len = ((msg->len) % 8); + index = 0; + + mxl_i2c("block_len %d, left_over_len %d", + block_len, left_over_len); + + /* command to read data from I2C interface */ + buf[0] = USB_READ_I2C_CMD; + buf[1] = 0x00; + + for (index = 0; index < block_len; index++) { + /* setup I2C read request packet on I2C interface */ + for (i = 0; i < 8; i++) { + buf[2+(i*3)] = I2C_DATA_REG; + buf[3+(i*3)] = 0x00; + buf[4+(i*3)] = 0x00; + } + + ret = mxl111sf_i2c_get_data(state, 0, buf, i2c_r_data); + + /* check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK reading slave address %02x", + msg->addr); + + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xC7; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + /* copy data from i2c data payload to read buffer */ + for (i = 0; i < 8; i++) { + rd_status[i] = i2c_r_data[(i*3)+2]; + + if (rd_status[i] == 0x04) { + if (i < 7) { + mxl_i2c("i2c fifo empty!" + " @ %d", i); + msg->buf[(index*8)+i] = + i2c_r_data[(i*3)+1]; + /* read again */ + ret_status = + mxl111sf_i2c_readagain( + state, 8-(i+1), + readbuff); + if (ret_status == 1) { + for (k = 0; + k < 8-(i+1); + k++) { + + msg->buf[(index*8)+(k+i+1)] = + readbuff[k]; + mxl_i2c("read data: %02x\t %02x", + msg->buf[(index*8)+(k+i)], + (index*8)+(k+i)); + mxl_i2c("read data: %02x\t %02x", + msg->buf[(index*8)+(k+i+1)], + readbuff[k]); + + } + goto stop_copy; + } else { + mxl_i2c("readagain " + "ERROR!"); + } + } else { + msg->buf[(index*8)+i] = + i2c_r_data[(i*3)+1]; + } + } else { + msg->buf[(index*8)+i] = + i2c_r_data[(i*3)+1]; + } + } +stop_copy: + ; + + } + + if (left_over_len) { + for (k = 0; k < 26; k++) + buf[k] = USB_END_I2C_CMD; + + buf[0] = 0xDD; + buf[1] = 0x00; + + for (i = 0; i < left_over_len; i++) { + buf[2+(i*3)] = I2C_DATA_REG; + buf[3+(i*3)] = 0x00; + buf[4+(i*3)] = 0x00; + } + ret = mxl111sf_i2c_get_data(state, 0, buf, + i2c_r_data); + + /* check for I2C NACK status */ + if (mxl111sf_i2c_check_status(state) == 1) { + mxl_i2c("NACK reading slave address %02x", + msg->addr); + + /* if NACK, stop I2C bus and exit */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xC7; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + ret = -EIO; + goto exit; + } + + for (i = 0; i < left_over_len; i++) { + msg->buf[(block_len*8)+i] = + i2c_r_data[(i*3)+1]; + mxl_i2c("read data: %02x\t %02x", + i2c_r_data[(i*3)+1], + i2c_r_data[(i*3)+2]); + } + } + + /* indicate I2C interface to issue NACK + after next I2C read op */ + buf[0] = USB_WRITE_I2C_CMD; + buf[1] = 0x00; + + /* control register */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0x17; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + + buf[5] = USB_END_I2C_CMD; + ret = mxl111sf_i2c_send_data(state, 0, buf); + + /* control register */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xC7; + buf[4] = (HWI2C400) ? 0x03 : 0x0D; + + } +exit: + /* STOP and disable I2C MUX */ + buf[0] = USB_WRITE_I2C_CMD; + buf[1] = 0x00; + + /* de-initilize I2C BUS */ + buf[5] = USB_END_I2C_CMD; + mxl111sf_i2c_send_data(state, 0, buf); + + /* Control Register */ + buf[2] = I2C_CONTROL_REG; + buf[3] = 0xDF; + buf[4] = 0x03; + + /* disable I2C interface */ + buf[5] = I2C_MUX_REG; + buf[6] = 0x00; + buf[7] = 0x00; + + /* de-initilize I2C BUS */ + buf[8] = USB_END_I2C_CMD; + mxl111sf_i2c_send_data(state, 0, buf); + + /* disable I2C interface */ + buf[2] = I2C_MUX_REG; + buf[3] = 0x81; + buf[4] = 0x00; + + /* disable I2C interface */ + buf[5] = I2C_MUX_REG; + buf[6] = 0x00; + buf[7] = 0x00; + + /* disable I2C interface */ + buf[8] = I2C_MUX_REG; + buf[9] = 0x00; + buf[10] = 0x00; + + buf[11] = USB_END_I2C_CMD; + mxl111sf_i2c_send_data(state, 0, buf); + + return ret; +} + +/* ------------------------------------------------------------------------ */ + +int mxl111sf_i2c_xfer(struct i2c_adapter *adap, + struct i2c_msg msg[], int num) +{ + struct dvb_usb_device *d = i2c_get_adapdata(adap); + struct mxl111sf_state *state = d->priv; + int hwi2c = (state->chip_rev > MXL111SF_V6); + int i, ret; + + if (mutex_lock_interruptible(&d->i2c_mutex) < 0) + return -EAGAIN; + + for (i = 0; i < num; i++) { + ret = (hwi2c) ? + mxl111sf_i2c_hw_xfer_msg(state, &msg[i]) : + mxl111sf_i2c_sw_xfer_msg(state, &msg[i]); + if (mxl_fail(ret)) { + mxl_debug_adv("failed with error %d on i2c " + "transaction %d of %d, %sing %d bytes " + "to/from 0x%02x", ret, i+1, num, + (msg[i].flags & I2C_M_RD) ? + "read" : "writ", + msg[i].len, msg[i].addr); + + break; + } + } + + mutex_unlock(&d->i2c_mutex); + + return i == num ? num : -EREMOTEIO; +} + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |