static s32 cyttsp4_spi_read_block_data(struct cyttsp4_spi *ts, u8 addr,
size_t length, void *data)
{
int rc = 0;
struct device *dev = &ts->client->dev;
dev_vdbg(dev, "%s: Enter\n", __func__);
/* Write address */
rc = cyttsp4_spi_xfer(CY_SPI_WR_OP, ts, addr, NULL, 0);
if (rc < 0) {
dev_err(dev, "%s: Fail write address r=%d\n", __func__, rc);
return rc;
}
/* Read data */
rc = cyttsp4_spi_xfer(CY_SPI_RD_OP, ts, addr, data, length);
if (rc < 0) {
dev_err(dev, "%s: Fail read r=%d\n", __func__, rc);
/*
* Do not print the above error if the data sync bytes
* were not found.
* This is a normal condition for the bootloader loader
* startup and need to retry until data sync bytes are found.
*/
} else if (rc > 0)
/* Now signal fail; so retry can be done */
rc = -EIO;
return rc;
}
static s32 cyttsp4_spi_read_block_data(void *handle, u16 addr,
size_t length, void *data, int spi_addr, bool use_subaddr)
{
struct cyttsp4_spi *ts =
container_of(handle, struct cyttsp4_spi, bus_ops);
int retval;
retval = cyttsp4_spi_xfer(CY_SPI_WR_OP, ts, addr, NULL, 0);
if (retval == 0)
retval = cyttsp4_spi_xfer(CY_SPI_RD_OP, ts, addr, data, length);
if (retval < 0)
dev_err(ts->bus_ops.dev,
"%s: cyttsp4_spi_read_block_data failed\n",
__func__);
/*
* Do not print the above error if the data sync bytes were not found.
* This is a normal condition for the bootloader loader startup and need
* to retry until data sync bytes are found.
*/
else if (retval > 0)
retval = -EIO; /* now signal fail; so retry can be done */
return retval;
}
static s32 cyttsp4_spi_read_block_data(struct cyttsp4_spi *ts, u16 addr,
int length, void *data, int max_xfer)
{
int rc = -EINVAL;
int retry = 0;
int trans_len;
struct device *dev = &ts->client->dev;
dev_vdbg(dev, "%s: Enter\n", __func__);
while (length > 0) {
trans_len = min(length, max_xfer);
/* Write address */
rc = cyttsp4_spi_xfer(CY_SPI_WR_OP, ts, addr, NULL, 0);
if (rc < 0) {
dev_err(dev, "%s: Fail write address r=%d\n",
__func__, rc);
return rc;
}
/* Read data */
rc = cyttsp4_spi_xfer(CY_SPI_RD_OP, ts, addr, data, trans_len);
if (rc < 0) {
dev_err(dev, "%s: Fail read r=%d\n", __func__, rc);
goto exit;
} else if (rc > 0) {
/* Perform retry or fail */
if (retry++ < CY_SPI_NUM_RETRY) {
dev_dbg(dev, "%s: ACK error, retry %d\n",
__func__, retry);
continue;
} else {
dev_err(dev, "%s: ACK error\n", __func__);
rc = -EIO;
goto exit;
}
}
length -= trans_len;
data += trans_len;
addr += trans_len;
}
exit:
return rc;
}
