spi.c (f477b7fb13df2b843997559ff34e87d054ba6538) spi.c (db90a44177ac39fc22b2da5235b231fccdd4c673)
1/*
2 * SPI init/core code
3 *
4 * Copyright (C) 2005 David Brownell
5 * Copyright (C) 2008 Secret Lab Technologies Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by

--- 1459 unchanged lines hidden (view full) ---

1468 xfer->tx_nbits = SPI_NBITS_SINGLE;
1469 if (xfer->rx_buf && !xfer->rx_nbits)
1470 xfer->rx_nbits = SPI_NBITS_SINGLE;
1471 /* check transfer tx/rx_nbits:
1472 * 1. keep the value is not out of single, dual and quad
1473 * 2. keep tx/rx_nbits is contained by mode in spi_device
1474 * 3. if SPI_3WIRE, tx/rx_nbits should be in single
1475 */
1/*
2 * SPI init/core code
3 *
4 * Copyright (C) 2005 David Brownell
5 * Copyright (C) 2008 Secret Lab Technologies Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by

--- 1459 unchanged lines hidden (view full) ---

1468 xfer->tx_nbits = SPI_NBITS_SINGLE;
1469 if (xfer->rx_buf && !xfer->rx_nbits)
1470 xfer->rx_nbits = SPI_NBITS_SINGLE;
1471 /* check transfer tx/rx_nbits:
1472 * 1. keep the value is not out of single, dual and quad
1473 * 2. keep tx/rx_nbits is contained by mode in spi_device
1474 * 3. if SPI_3WIRE, tx/rx_nbits should be in single
1475 */
1476 if (xfer->tx_nbits != SPI_NBITS_SINGLE &&
1477 xfer->tx_nbits != SPI_NBITS_DUAL &&
1478 xfer->tx_nbits != SPI_NBITS_QUAD)
1479 return -EINVAL;
1480 if ((xfer->tx_nbits == SPI_NBITS_DUAL) &&
1481 !(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD)))
1482 return -EINVAL;
1483 if ((xfer->tx_nbits == SPI_NBITS_QUAD) &&
1484 !(spi->mode & SPI_TX_QUAD))
1485 return -EINVAL;
1486 if ((spi->mode & SPI_3WIRE) &&
1487 (xfer->tx_nbits != SPI_NBITS_SINGLE))
1488 return -EINVAL;
1476 if (xfer->tx_buf) {
1477 if (xfer->tx_nbits != SPI_NBITS_SINGLE &&
1478 xfer->tx_nbits != SPI_NBITS_DUAL &&
1479 xfer->tx_nbits != SPI_NBITS_QUAD)
1480 return -EINVAL;
1481 if ((xfer->tx_nbits == SPI_NBITS_DUAL) &&
1482 !(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD)))
1483 return -EINVAL;
1484 if ((xfer->tx_nbits == SPI_NBITS_QUAD) &&
1485 !(spi->mode & SPI_TX_QUAD))
1486 return -EINVAL;
1487 if ((spi->mode & SPI_3WIRE) &&
1488 (xfer->tx_nbits != SPI_NBITS_SINGLE))
1489 return -EINVAL;
1490 }
1489 /* check transfer rx_nbits */
1491 /* check transfer rx_nbits */
1490 if (xfer->rx_nbits != SPI_NBITS_SINGLE &&
1491 xfer->rx_nbits != SPI_NBITS_DUAL &&
1492 xfer->rx_nbits != SPI_NBITS_QUAD)
1493 return -EINVAL;
1494 if ((xfer->rx_nbits == SPI_NBITS_DUAL) &&
1495 !(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD)))
1496 return -EINVAL;
1497 if ((xfer->rx_nbits == SPI_NBITS_QUAD) &&
1498 !(spi->mode & SPI_RX_QUAD))
1499 return -EINVAL;
1500 if ((spi->mode & SPI_3WIRE) &&
1501 (xfer->rx_nbits != SPI_NBITS_SINGLE))
1502 return -EINVAL;
1492 if (xfer->rx_buf) {
1493 if (xfer->rx_nbits != SPI_NBITS_SINGLE &&
1494 xfer->rx_nbits != SPI_NBITS_DUAL &&
1495 xfer->rx_nbits != SPI_NBITS_QUAD)
1496 return -EINVAL;
1497 if ((xfer->rx_nbits == SPI_NBITS_DUAL) &&
1498 !(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD)))
1499 return -EINVAL;
1500 if ((xfer->rx_nbits == SPI_NBITS_QUAD) &&
1501 !(spi->mode & SPI_RX_QUAD))
1502 return -EINVAL;
1503 if ((spi->mode & SPI_3WIRE) &&
1504 (xfer->rx_nbits != SPI_NBITS_SINGLE))
1505 return -EINVAL;
1506 }
1503 }
1504
1505 message->spi = spi;
1506 message->status = -EINPROGRESS;
1507 return master->transfer(spi, message);
1508}
1509
1510/**

--- 352 unchanged lines hidden --- 		1507 }
1508
1509 message->spi = spi;
1510 message->status = -EINPROGRESS;
1511 return master->transfer(spi, message);
1512}
1513
1514/**

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