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authorSonic Zhang <sonic.zhang@analog.com>2008-10-13 05:33:51 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 12:51:38 -0400
commitab2375f2fe256358a982e357d298801cf1adbd00 (patch)
treef64dc27aa9756dd951da6a9453db7a75f437d083 /drivers/serial/bfin_5xx.c
parentb3ef5aba64aed5be0fccca3ff39c8f2282111ce5 (diff)
Blackfin Serial Driver: Fix bug - request UART2/3 peripheral mapped interrupts in PIO mode
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial/bfin_5xx.c')
-rw-r--r--drivers/serial/bfin_5xx.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index a5cf0e70b3f6..569f0e2476c6 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -649,6 +649,42 @@ static int bfin_serial_startup(struct uart_port *port)
649 free_irq(uart->port.irq, uart); 649 free_irq(uart->port.irq, uart);
650 return -EBUSY; 650 return -EBUSY;
651 } 651 }
652
653# ifdef CONFIG_BF54x
654 {
655 unsigned uart_dma_ch_rx, uart_dma_ch_tx;
656
657 switch (uart->port.irq) {
658 case IRQ_UART3_RX:
659 uart_dma_ch_rx = CH_UART3_RX;
660 uart_dma_ch_tx = CH_UART3_TX;
661 break;
662 case IRQ_UART2_RX:
663 uart_dma_ch_rx = CH_UART2_RX;
664 uart_dma_ch_tx = CH_UART2_TX;
665 break;
666 default:
667 uart_dma_ch_rx = uart_dma_ch_tx = 0;
668 break;
669 };
670
671 if (uart_dma_ch_rx &&
672 request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) {
673 printk(KERN_NOTICE"Fail to attach UART interrupt\n");
674 free_irq(uart->port.irq, uart);
675 free_irq(uart->port.irq + 1, uart);
676 return -EBUSY;
677 }
678 if (uart_dma_ch_tx &&
679 request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) {
680 printk(KERN_NOTICE "Fail to attach UART interrupt\n");
681 free_dma(uart_dma_ch_rx);
682 free_irq(uart->port.irq, uart);
683 free_irq(uart->port.irq + 1, uart);
684 return -EBUSY;
685 }
686 }
687# endif
652#endif 688#endif
653 UART_SET_IER(uart, ERBFI); 689 UART_SET_IER(uart, ERBFI);
654 return 0; 690 return 0;
@@ -666,6 +702,20 @@ static void bfin_serial_shutdown(struct uart_port *port)
666 del_timer(&(uart->rx_dma_timer)); 702 del_timer(&(uart->rx_dma_timer));
667 dma_free_coherent(NULL, PAGE_SIZE, uart->rx_dma_buf.buf, 0); 703 dma_free_coherent(NULL, PAGE_SIZE, uart->rx_dma_buf.buf, 0);
668#else 704#else
705#ifdef CONFIG_BF54x
706 switch (uart->port.irq) {
707 case IRQ_UART3_RX:
708 free_dma(CH_UART3_RX);
709 free_dma(CH_UART3_TX);
710 break;
711 case IRQ_UART2_RX:
712 free_dma(CH_UART2_RX);
713 free_dma(CH_UART2_TX);
714 break;
715 default:
716 break;
717 };
718#endif
669#ifdef CONFIG_KGDB_UART 719#ifdef CONFIG_KGDB_UART
670 if (uart->port.line != CONFIG_KGDB_UART_PORT) 720 if (uart->port.line != CONFIG_KGDB_UART_PORT)
671#endif 721#endif