spi/s3c64xx: Use core message handling

Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index c7b36c0..25eb352 100644 (file)
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -879,121 +879,81 @@ static int s3c64xx_spi_prepare_message(struct spi_master *master,
        return 0;
 }
 
-static int s3c64xx_spi_transfer_one_message(struct spi_master *master,
-                                           struct spi_message *msg)
+static int s3c64xx_spi_transfer_one(struct spi_master *master,
+                                   struct spi_device *spi,
+                                   struct spi_transfer *xfer)
 {
        struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(master);
-       struct spi_device *spi = msg->spi;
-       struct spi_transfer *xfer;
-       int status = 0, cs_toggle = 0;
+       int status;
        u32 speed;
        u8 bpw;
+       unsigned long flags;
+       int use_dma;
 
-       list_for_each_entry(xfer, &msg->transfers, transfer_list) {
-
-               unsigned long flags;
-               int use_dma;
-
-               INIT_COMPLETION(sdd->xfer_completion);
-
-               /* Only BPW and Speed may change across transfers */
-               bpw = xfer->bits_per_word;
-               speed = xfer->speed_hz ? : spi->max_speed_hz;
-
-               if (xfer->len % (bpw / 8)) {
-                       dev_err(&spi->dev,
-                               "Xfer length(%u) not a multiple of word size(%u)\n",
-                               xfer->len, bpw / 8);
-                       status = -EIO;
-                       goto out;
-               }
-
-               if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) {
-                       sdd->cur_bpw = bpw;
-                       sdd->cur_speed = speed;
-                       s3c64xx_spi_config(sdd);
-               }
-
-               /* Slave Select */
-               enable_cs(sdd, spi);
-
-               /* Polling method for xfers not bigger than FIFO capacity */
-               use_dma = 0;
-               if (!is_polling(sdd) &&
-                       (sdd->rx_dma.ch && sdd->tx_dma.ch &&
-                       (xfer->len > ((FIFO_LVL_MASK(sdd) >> 1) + 1))))
-                       use_dma = 1;
-
-               spin_lock_irqsave(&sdd->lock, flags);
+       INIT_COMPLETION(sdd->xfer_completion);
 
-               /* Pending only which is to be done */
-               sdd->state &= ~RXBUSY;
-               sdd->state &= ~TXBUSY;
+       /* Only BPW and Speed may change across transfers */
+       bpw = xfer->bits_per_word;
+       speed = xfer->speed_hz ? : spi->max_speed_hz;
 
-               enable_datapath(sdd, spi, xfer, use_dma);
-
-               /* Start the signals */
-               writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+       if (xfer->len % (bpw / 8)) {
+               dev_err(&spi->dev,
+                       "Xfer length(%u) not a multiple of word size(%u)\n",
+                       xfer->len, bpw / 8);
+               return -EIO;
+       }
 
-               /* Start the signals */
-               writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
+       if (bpw != sdd->cur_bpw || speed != sdd->cur_speed) {
+               sdd->cur_bpw = bpw;
+               sdd->cur_speed = speed;
+               s3c64xx_spi_config(sdd);
+       }
 
-               spin_unlock_irqrestore(&sdd->lock, flags);
+       /* Polling method for xfers not bigger than FIFO capacity */
+       use_dma = 0;
+       if (!is_polling(sdd) &&
+           (sdd->rx_dma.ch && sdd->tx_dma.ch &&
+            (xfer->len > ((FIFO_LVL_MASK(sdd) >> 1) + 1))))
+               use_dma = 1;
 
-               status = wait_for_xfer(sdd, xfer, use_dma);
+       spin_lock_irqsave(&sdd->lock, flags);
 
-               if (status) {
-                       dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
-                               xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
-                               (sdd->state & RXBUSY) ? 'f' : 'p',
-                               (sdd->state & TXBUSY) ? 'f' : 'p',
-                               xfer->len);
+       /* Pending only which is to be done */
+       sdd->state &= ~RXBUSY;
+       sdd->state &= ~TXBUSY;
 
-                       if (use_dma) {
-                               if (xfer->tx_buf != NULL
-                                               && (sdd->state & TXBUSY))
-                                       s3c64xx_spi_dma_stop(sdd, &sdd->tx_dma);
-                               if (xfer->rx_buf != NULL
-                                               && (sdd->state & RXBUSY))
-                                       s3c64xx_spi_dma_stop(sdd, &sdd->rx_dma);
-                       }
+       enable_datapath(sdd, spi, xfer, use_dma);
 
-                       goto out;
-               }
+       /* Start the signals */
+       writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
-               flush_fifo(sdd);
+       /* Start the signals */
+       writel(0, sdd->regs + S3C64XX_SPI_SLAVE_SEL);
 
-               if (xfer->delay_usecs)
-                       udelay(xfer->delay_usecs);
+       spin_unlock_irqrestore(&sdd->lock, flags);
 
-               if (xfer->cs_change) {
-                       /* Hint that the next mssg is gonna be
-                          for the same device */
-                       if (list_is_last(&xfer->transfer_list,
-                                               &msg->transfers))
-                               cs_toggle = 1;
+       status = wait_for_xfer(sdd, xfer, use_dma);
+
+       if (status) {
+               dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
+                       xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0,
+                       (sdd->state & RXBUSY) ? 'f' : 'p',
+                       (sdd->state & TXBUSY) ? 'f' : 'p',
+                       xfer->len);
+
+               if (use_dma) {
+                       if (xfer->tx_buf != NULL
+                           && (sdd->state & TXBUSY))
+                               s3c64xx_spi_dma_stop(sdd, &sdd->tx_dma);
+                       if (xfer->rx_buf != NULL
+                           && (sdd->state & RXBUSY))
+                               s3c64xx_spi_dma_stop(sdd, &sdd->rx_dma);
                }
-
-               msg->actual_length += xfer->len;
-       }
-
-out:
-       if (!cs_toggle || status) {
-               /* Quiese the signals */
-               writel(S3C64XX_SPI_SLAVE_SIG_INACT,
-                      sdd->regs + S3C64XX_SPI_SLAVE_SEL);
-               disable_cs(sdd, spi);
        } else {
-               sdd->tgl_spi = spi;
+               flush_fifo(sdd);
        }
 
-       s3c64xx_spi_unmap_mssg(sdd, msg);
-
-       msg->status = status;
-
-       spi_finalize_current_message(master);
-
-       return 0;
+       return status;
 }
 
 static int s3c64xx_spi_unprepare_message(struct spi_master *master,
@@ -1379,7 +1339,7 @@ static int s3c64xx_spi_probe(struct platform_device *pdev)
        master->cleanup = s3c64xx_spi_cleanup;
        master->prepare_transfer_hardware = s3c64xx_spi_prepare_transfer;
        master->prepare_message = s3c64xx_spi_prepare_message;
-       master->transfer_one_message = s3c64xx_spi_transfer_one_message;
+       master->transfer_one = s3c64xx_spi_transfer_one;
        master->unprepare_message = s3c64xx_spi_unprepare_message;
        master->unprepare_transfer_hardware = s3c64xx_spi_unprepare_transfer;
        master->num_chipselect = sci->num_cs;