/* * cx231xx_i2c_recv_bytes_with_saddr() * read a byte from the i2c device */ static int cx231xx_i2c_recv_bytes_with_saddr(struct i2c_adapter *i2c_adap, const struct i2c_msg *msg1, const struct i2c_msg *msg2) { struct cx231xx_i2c *bus = i2c_adap->algo_data; struct cx231xx *dev = bus->dev; struct cx231xx_i2c_xfer_data req_data; int status = 0; u16 saddr = 0; u8 need_gpio = 0; if (msg1->len == 2) saddr = msg1->buf[0] << 8 | msg1->buf[1]; else if (msg1->len == 1) saddr = msg1->buf[0]; if (is_tuner(dev, bus, msg2, TUNER_XC5000)) { if ((msg2->len < 16)) { dprintk1(1, "i2c_read: addr 0x%x, len %d, saddr 0x%x, len %d\n", msg2->addr, msg2->len, saddr, msg1->len); switch (saddr) { case 0x0008: /* read FW load status */ need_gpio = 1; break; case 0x0004: /* read Lock status */ need_gpio = 1; break; } if (need_gpio) { status = dev->cx231xx_gpio_i2c_write(dev, msg1->addr, msg1->buf, msg1->len); status = dev->cx231xx_gpio_i2c_read(dev, msg2->addr, msg2->buf, msg2->len); return status; } } } /* prepare xfer_data struct */ req_data.dev_addr = msg2->addr; req_data.direction = msg2->flags; req_data.saddr_len = msg1->len; req_data.saddr_dat = saddr; req_data.buf_size = msg2->len; req_data.p_buffer = msg2->buf; /* usb send command */ status = dev->cx231xx_send_usb_command(bus, &req_data); return status < 0 ? status : 0; }
int cx231xx_i2c_send_bytes(struct i2c_adapter *i2c_adap, const struct i2c_msg *msg) { struct cx231xx_i2c *bus = i2c_adap->algo_data; struct cx231xx *dev = bus->dev; struct cx231xx_i2c_xfer_data req_data; int status = 0; u16 size = 0; u8 loop = 0; u8 saddr_len = 1; u8 *buf_ptr = NULL; u16 saddr = 0; u8 need_gpio = 0; if ((bus->nr == 1) && (msg->addr == 0x61) && (dev->tuner_type == TUNER_XC5000)) { size = msg->len; if (size == 2) { /* register write sub addr */ /* Just writing sub address will cause problem * to XC5000. So ignore the request */ return 0; } else if (size == 4) { /* register write with sub addr */ if (msg->len >= 2) saddr = msg->buf[0] << 8 | msg->buf[1]; else if (msg->len == 1) saddr = msg->buf[0]; switch (saddr) { case 0x0000: /* start tuner calibration mode */ need_gpio = 1; /* FW Loading is done */ dev->xc_fw_load_done = 1; break; case 0x000D: /* Set signal source */ case 0x0001: /* Set TV standard - Video */ case 0x0002: /* Set TV standard - Audio */ case 0x0003: /* Set RF Frequency */ need_gpio = 1; break; default: if (dev->xc_fw_load_done) need_gpio = 1; break; } if (need_gpio) { dprintk1(1, "GPIO WRITE: addr 0x%x, len %d, saddr 0x%x\n", msg->addr, msg->len, saddr); return dev->cx231xx_gpio_i2c_write(dev, msg->addr, msg->buf, msg->len); } } /* special case for Xc5000 tuner case */ saddr_len = 1; /* adjust the length to correct length */ size -= saddr_len; buf_ptr = (u8 *) (msg->buf + 1); do { /* prepare xfer_data struct */ req_data.dev_addr = msg->addr; req_data.direction = msg->flags; req_data.saddr_len = saddr_len; req_data.saddr_dat = msg->buf[0]; req_data.buf_size = size > 16 ? 16 : size; req_data.p_buffer = (u8 *) (buf_ptr + loop * 16); bus->i2c_nostop = (size > 16) ? 1 : 0; bus->i2c_reserve = (loop == 0) ? 0 : 1; /* usb send command */ status = dev->cx231xx_send_usb_command(bus, &req_data); loop++; if (size >= 16) size -= 16; else size = 0; } while (size > 0); bus->i2c_nostop = 0; bus->i2c_reserve = 0; } else { /* regular case */ /* prepare xfer_data struct */ req_data.dev_addr = msg->addr; req_data.direction = msg->flags; req_data.saddr_len = 0; req_data.saddr_dat = 0; req_data.buf_size = msg->len; req_data.p_buffer = msg->buf; /* usb send command */ status = dev->cx231xx_send_usb_command(bus, &req_data); } return status < 0 ? status : 0; }
static int cx231xx_i2c_recv_bytes(struct i2c_adapter *i2c_adap, const struct i2c_msg *msg) { struct cx231xx_i2c *bus = i2c_adap->algo_data; struct cx231xx *dev = bus->dev; struct cx231xx_i2c_xfer_data req_data; int status = 0; u16 saddr = 0; u8 need_gpio = 0; if ((bus->nr == 1) && (msg->addr == 0x61) && dev->tuner_type == TUNER_XC5000) { if (msg->len == 2) saddr = msg->buf[0] << 8 | msg->buf[1]; else if (msg->len == 1) saddr = msg->buf[0]; if (dev->xc_fw_load_done) { switch (saddr) { case 0x0009: /* BUSY check */ dprintk1(1, "GPIO R E A D: Special case BUSY check \n"); /*Try read BUSY register, just set it to zero*/ msg->buf[0] = 0; if (msg->len == 2) msg->buf[1] = 0; return 0; case 0x0004: /* read Lock status */ need_gpio = 1; break; } if (need_gpio) { /* this is a special case to handle Xceive tuner clock stretch issue with gpio based I2C */ dprintk1(1, "GPIO R E A D: addr 0x%x, len %d, saddr 0x%x\n", msg->addr, msg->len, msg->buf[0] << 8 | msg->buf[1]); status = dev->cx231xx_gpio_i2c_write(dev, msg->addr, msg->buf, msg->len); status = dev->cx231xx_gpio_i2c_read(dev, msg->addr, msg->buf, msg->len); return status; } } /* prepare xfer_data struct */ req_data.dev_addr = msg->addr; req_data.direction = msg->flags; req_data.saddr_len = msg->len; req_data.saddr_dat = msg->buf[0] << 8 | msg->buf[1]; req_data.buf_size = msg->len; req_data.p_buffer = msg->buf; /* usb send command */ status = dev->cx231xx_send_usb_command(bus, &req_data); } else { /* prepare xfer_data struct */ req_data.dev_addr = msg->addr; req_data.direction = msg->flags; req_data.saddr_len = 0; req_data.saddr_dat = 0; req_data.buf_size = msg->len; req_data.p_buffer = msg->buf; /* usb send command */ status = dev->cx231xx_send_usb_command(bus, &req_data); } return status < 0 ? status : 0; }