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path: root/drivers/spi
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-rw-r--r--drivers/spi/spi_bfin5xx.c52
1 files changed, 45 insertions, 7 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index d6e9812538c4..22697b812205 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -234,10 +234,8 @@ static int restore_state(struct driver_data *drv_data)
234 dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n"); 234 dev_dbg(&drv_data->pdev->dev, "restoring spi ctl state\n");
235 235
236 /* Load the registers */ 236 /* Load the registers */
237 write_BAUD(drv_data, chip->baud);
238 chip->ctl_reg &= (~BIT_CTL_TIMOD);
239 chip->ctl_reg |= (chip->width << 8);
240 write_CTRL(drv_data, chip->ctl_reg); 237 write_CTRL(drv_data, chip->ctl_reg);
238 write_BAUD(drv_data, chip->baud);
241 239
242 bfin_spi_enable(drv_data); 240 bfin_spi_enable(drv_data);
243 cs_active(drv_data, chip); 241 cs_active(drv_data, chip);
@@ -679,6 +677,7 @@ static void pump_transfers(unsigned long data)
679 message = drv_data->cur_msg; 677 message = drv_data->cur_msg;
680 transfer = drv_data->cur_transfer; 678 transfer = drv_data->cur_transfer;
681 chip = drv_data->cur_chip; 679 chip = drv_data->cur_chip;
680
682 /* 681 /*
683 * if msg is error or done, report it back using complete() callback 682 * if msg is error or done, report it back using complete() callback
684 */ 683 */
@@ -736,15 +735,48 @@ static void pump_transfers(unsigned long data)
736 drv_data->len_in_bytes = transfer->len; 735 drv_data->len_in_bytes = transfer->len;
737 drv_data->cs_change = transfer->cs_change; 736 drv_data->cs_change = transfer->cs_change;
738 737
739 width = chip->width; 738 /* Bits per word setup */
739 switch (transfer->bits_per_word) {
740 case 8:
741 drv_data->n_bytes = 1;
742 width = CFG_SPI_WORDSIZE8;
743 drv_data->read = chip->cs_change_per_word ?
744 u8_cs_chg_reader : u8_reader;
745 drv_data->write = chip->cs_change_per_word ?
746 u8_cs_chg_writer : u8_writer;
747 drv_data->duplex = chip->cs_change_per_word ?
748 u8_cs_chg_duplex : u8_duplex;
749 break;
750
751 case 16:
752 drv_data->n_bytes = 2;
753 width = CFG_SPI_WORDSIZE16;
754 drv_data->read = chip->cs_change_per_word ?
755 u16_cs_chg_reader : u16_reader;
756 drv_data->write = chip->cs_change_per_word ?
757 u16_cs_chg_writer : u16_writer;
758 drv_data->duplex = chip->cs_change_per_word ?
759 u16_cs_chg_duplex : u16_duplex;
760 break;
761
762 default:
763 /* No change, the same as default setting */
764 drv_data->n_bytes = chip->n_bytes;
765 width = chip->width;
766 drv_data->write = drv_data->tx ? chip->write : null_writer;
767 drv_data->read = drv_data->rx ? chip->read : null_reader;
768 drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
769 break;
770 }
771 cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
772 cr |= (width << 8);
773 write_CTRL(drv_data, cr);
774
740 if (width == CFG_SPI_WORDSIZE16) { 775 if (width == CFG_SPI_WORDSIZE16) {
741 drv_data->len = (transfer->len) >> 1; 776 drv_data->len = (transfer->len) >> 1;
742 } else { 777 } else {
743 drv_data->len = transfer->len; 778 drv_data->len = transfer->len;
744 } 779 }
745 drv_data->write = drv_data->tx ? chip->write : null_writer;
746 drv_data->read = drv_data->rx ? chip->read : null_reader;
747 drv_data->duplex = chip->duplex ? chip->duplex : null_writer;
748 dev_dbg(&drv_data->pdev->dev, "transfer: ", 780 dev_dbg(&drv_data->pdev->dev, "transfer: ",
749 "drv_data->write is %p, chip->write is %p, null_wr is %p\n", 781 "drv_data->write is %p, chip->write is %p, null_wr is %p\n",
750 drv_data->write, chip->write, null_writer); 782 drv_data->write, chip->write, null_writer);
@@ -753,6 +785,12 @@ static void pump_transfers(unsigned long data)
753 message->state = RUNNING_STATE; 785 message->state = RUNNING_STATE;
754 dma_config = 0; 786 dma_config = 0;
755 787
788 /* Speed setup (surely valid because already checked) */
789 if (transfer->speed_hz)
790 write_BAUD(drv_data, hz_to_spi_baud(transfer->speed_hz));
791 else
792 write_BAUD(drv_data, chip->baud);
793
756 write_STAT(drv_data, BIT_STAT_CLR); 794 write_STAT(drv_data, BIT_STAT_CLR);
757 cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD)); 795 cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
758 cs_active(drv_data, chip); 796 cs_active(drv_data, chip);