From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Vinod Koul <vinod.koul@intel.com>,
linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
ismo.puustinen@intel.com,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
linux-serial@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 07/12] serial: 8250_dma: adjust DMA address of the UART
Date: Thu, 7 Apr 2016 23:37:08 +0300 [thread overview]
Message-ID: <1460061433-63750-8-git-send-email-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <1460061433-63750-1-git-send-email-andriy.shevchenko@linux.intel.com>
Some UARTs, e.g. one is used in Intel Quark, have a different address base for
DMA operations. Introduce an additional field in struct uart_8250_dma to cover
those cases.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/tty/serial/8250/8250.h | 2 ++
drivers/tty/serial/8250/8250_dma.c | 5 +++--
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 047a7ba..040deb2 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -31,6 +31,8 @@ struct uart_8250_dma {
struct dma_chan *rxchan;
struct dma_chan *txchan;
+ phys_addr_t dma_addr;
+
dma_addr_t rx_addr;
dma_addr_t tx_addr;
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index b134bec..a314492 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -164,16 +164,17 @@ int serial8250_rx_dma(struct uart_8250_port *p, unsigned int iir)
int serial8250_request_dma(struct uart_8250_port *p)
{
struct uart_8250_dma *dma = p->dma;
+ phys_addr_t dma_addr = dma->dma_addr ? dma->dma_addr : p->port.mapbase;
dma_cap_mask_t mask;
/* Default slave configuration parameters */
dma->rxconf.direction = DMA_DEV_TO_MEM;
dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- dma->rxconf.src_addr = p->port.mapbase + UART_RX;
+ dma->rxconf.src_addr = dma_addr + UART_RX;
dma->txconf.direction = DMA_MEM_TO_DEV;
dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
- dma->txconf.dst_addr = p->port.mapbase + UART_TX;
+ dma->txconf.dst_addr = dma_addr + UART_TX;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
--
2.8.0.rc3
next prev parent reply other threads:[~2016-04-07 20:37 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-07 20:37 [PATCH v1 00/12] serial: 8250: split LPSS to 8250_lpss, enable DMA on Quark Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 01/12] dmaengine: dw: keep copy of custom slave config in dwc Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 02/12] dmaengine: dw: provide probe(), remove() stubs for users Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 03/12] dmaengine: dw: set polarity of handshake interface Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 04/12] dmaengine: dw: override LLP support if asked in platform data Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 05/12] serial: 8250_dma: switch to new dmaengine_terminate_* API Andy Shevchenko
2016-04-07 23:55 ` Peter Hurley
2016-04-07 20:37 ` [PATCH v1 06/12] serial: 8250_dma: stop ongoing RX DMA on exception Andy Shevchenko
2016-04-07 23:54 ` Peter Hurley
2016-04-08 8:07 ` Andy Shevchenko
2016-04-08 23:20 ` Peter Hurley
2016-04-07 20:37 ` Andy Shevchenko [this message]
2016-04-08 0:24 ` [PATCH v1 07/12] serial: 8250_dma: adjust DMA address of the UART Peter Hurley
2016-04-07 20:37 ` [PATCH v1 08/12] serial: 8250: enable AFE on ports where FIFO is 16 bytes Andy Shevchenko
2016-04-07 23:43 ` Peter Hurley
2016-04-07 20:37 ` [PATCH v1 09/12] serial: 8250_lpss: split LPSS driver to separate module Andy Shevchenko
2016-04-08 1:42 ` Peter Hurley
2016-04-08 8:17 ` Andy Shevchenko
2016-04-08 22:44 ` Peter Hurley
2016-04-11 13:09 ` Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 10/12] serial: 8250_lpss: move Quark code from PCI driver Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 11/12] serial: 8250_lpss: enable MSI for Intel Quark Andy Shevchenko
2016-04-07 20:37 ` [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART Andy Shevchenko
2016-04-11 15:33 ` Bryan O'Donoghue
2016-04-11 15:51 ` Andy Shevchenko
2016-04-11 16:05 ` Andy Shevchenko
2016-04-12 16:25 ` Bryan O'Donoghue
2016-04-12 16:50 ` Andy Shevchenko
2016-04-13 11:22 ` Bryan O'Donoghue
2016-04-13 12:03 ` Andy Shevchenko
2016-04-13 14:34 ` Bryan O'Donoghue
2016-04-13 14:48 ` Andy Shevchenko
2016-04-13 15:24 ` Bryan O'Donoghue
2016-04-09 16:53 ` [PATCH v1 00/12] serial: 8250: split LPSS to 8250_lpss, enable DMA on Quark Bryan O'Donoghue
2016-04-09 17:48 ` Andy Shevchenko
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