Commit 3a878c43 authored by Ivan T. Ivanov's avatar Ivan T. Ivanov Committed by Greg Kroah-Hartman

tty: serial: msm: Add TX DMA support

Add transmit DMA support for UARTDM type of controllers.

Tested on APQ8064, which have UARTDM v1.3 and ADM DMA engine
and APQ8016, which have UARTDM v1.4 and BAM DMA engine.
Signed-off-by: default avatarIvan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 558abdb0
...@@ -26,6 +26,9 @@ Required properties: ...@@ -26,6 +26,9 @@ Required properties:
Optional properties: Optional properties:
- dmas: Should contain dma specifiers for transmit and receive channels - dmas: Should contain dma specifiers for transmit and receive channels
- dma-names: Should contain "tx" for transmit and "rx" for receive channels - dma-names: Should contain "tx" for transmit and "rx" for receive channels
- qcom,tx-crci: Identificator <u32> for Client Rate Control Interface to be
used with TX DMA channel. Required when using DMA for transmission
with UARTDM v1.3 and bellow.
Note: Aliases may be defined to ensure the correct ordering of the UARTs. Note: Aliases may be defined to ensure the correct ordering of the UARTs.
The alias serialN will result in the UART being assigned port N. If any The alias serialN will result in the UART being assigned port N. If any
......
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...@@ -121,6 +121,9 @@ ...@@ -121,6 +121,9 @@
#define UARTDM_DMEN_RX_SC_ENABLE BIT(5) #define UARTDM_DMEN_RX_SC_ENABLE BIT(5)
#define UARTDM_DMEN_TX_SC_ENABLE BIT(4) #define UARTDM_DMEN_TX_SC_ENABLE BIT(4)
#define UARTDM_DMEN_TX_BAM_ENABLE BIT(2) /* UARTDM_1P4 */
#define UARTDM_DMEN_TX_DM_ENABLE BIT(0) /* < UARTDM_1P4 */
#define UARTDM_DMRX 0x34 #define UARTDM_DMRX 0x34
#define UARTDM_NCF_TX 0x40 #define UARTDM_NCF_TX 0x40
#define UARTDM_RX_TOTAL_SNAP 0x38 #define UARTDM_RX_TOTAL_SNAP 0x38
......
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