spi: davinci: use edma_write_slot() to setup EDMA PaRAM slot

Currently a series of EDMA API calls are being made to setup
various aspects of EDMA PaRAM slots for receive and transmit.

Instead setup the PaRAM using a local structure and write once
to the hardware using edma_write_slot()

Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Tested-By: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 705d006..67f1e46 100644 (file)
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -725,6 +725,7 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
        struct davinci_spi_platform_data *pdata;
        void *rx_buf;
        struct device *sdev;
+       struct edmacc_param param;
 
        davinci_spi = spi_master_get_devdata(spi->master);
        pdata = davinci_spi->pdata;
@@ -773,14 +774,15 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
                }
        }
 
-       edma_set_transfer_params(davinci_spi_dma->dma_tx_channel,
-                                       data_type, count, 1, 0, ASYNC);
-       edma_set_dest(davinci_spi_dma->dma_tx_channel, tx_reg, INCR, W8BIT);
-       edma_set_src(davinci_spi_dma->dma_tx_channel,
-                       t->tx_buf ? t->tx_dma : tx_reg, INCR, W8BIT);
-       edma_set_src_index(davinci_spi_dma->dma_tx_channel,
-                       t->tx_buf ? data_type : 0, 0);
-       edma_set_dest_index(davinci_spi_dma->dma_tx_channel, 0, 0);
+       param.opt = TCINTEN | EDMA_TCC(davinci_spi_dma->dma_tx_channel);
+       param.src = t->tx_buf ? t->tx_dma : tx_reg;
+       param.a_b_cnt = count << 16 | data_type;
+       param.dst = tx_reg;
+       param.src_dst_bidx = t->tx_buf ? data_type : 0;
+       param.link_bcntrld = 0xffff;
+       param.src_dst_cidx = 0;
+       param.ccnt = 1;
+       edma_write_slot(davinci_spi_dma->dma_tx_channel, &param);
 
        /*
         * Receive DMA setup
@@ -812,13 +814,15 @@ static int davinci_spi_bufs_dma(struct spi_device *spi, struct spi_transfer *t)
                return -ENOMEM;
        }
 
-       edma_set_transfer_params(davinci_spi_dma->dma_rx_channel, data_type,
-                                                       count, 1, 0, ASYNC);
-       edma_set_src(davinci_spi_dma->dma_rx_channel, rx_reg, INCR, W8BIT);
-       edma_set_dest(davinci_spi_dma->dma_rx_channel, t->rx_dma, INCR, W8BIT);
-       edma_set_src_index(davinci_spi_dma->dma_rx_channel, 0, 0);
-       edma_set_dest_index(davinci_spi_dma->dma_rx_channel,
-                                               t->rx_buf ? data_type : 0, 0);
+       param.opt = TCINTEN | EDMA_TCC(davinci_spi_dma->dma_rx_channel);
+       param.src = rx_reg;
+       param.a_b_cnt = count << 16 | data_type;
+       param.dst = t->rx_dma;
+       param.src_dst_bidx = (t->rx_buf ? data_type : 0) << 16;
+       param.link_bcntrld = 0xffff;
+       param.src_dst_cidx = 0;
+       param.ccnt = 1;
+       edma_write_slot(davinci_spi_dma->dma_rx_channel, &param);
 
        if (pdata->cshold_bug) {
                u16 spidat1 = ioread16(davinci_spi->base + SPIDAT1 + 2);