blackfin: serial driver

This patch implements the driver necessary use the Analog Devices Blackfin
processor's Serial Port.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e9d927e3b8e6..924e9bd757f0 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -508,6 +508,100 @@ config SERIAL_SA1100_CONSOLE
           your boot loader (lilo or loadlin) about how to pass options to the
           kernel at boot time.)
 
+config SERIAL_BFIN
+        tristate "Blackfin serial port support"
+        depends on BFIN
+        select SERIAL_CORE
+        select SERIAL_BFIN_UART0 if (BF531 || BF532 || BF533 || BF561)
+        help
+          Add support for the built-in UARTs on the Blackfin.
+
+          To compile this driver as a module, choose M here: the
+          module will be called bfin_5xx.
+
+config SERIAL_BFIN_CONSOLE
+        bool "Console on Blackfin serial port"
+        depends on SERIAL_BFIN
+        select SERIAL_CORE_CONSOLE
+
+choice
+        prompt "UART Mode"
+        depends on SERIAL_BFIN
+        default SERIAL_BFIN_DMA
+        help
+          This driver supports the built-in serial ports of the Blackfin family
+          of CPUs
+
+config SERIAL_BFIN_DMA
+        bool "DMA mode"
+        depends on DMA_UNCACHED_1M
+        help
+          This driver works under DMA mode. If this option is selected, the
+          blackfin simple dma driver is also enabled.
+
+config SERIAL_BFIN_PIO
+        bool "PIO mode"
+        help
+          This driver works under PIO mode.
+
+endchoice
+
+config SERIAL_BFIN_UART0
+        bool "Enable UART0"
+        depends on SERIAL_BFIN
+        help
+          Enable UART0
+
+config BFIN_UART0_CTSRTS
+        bool "Enable UART0 hardware flow control"
+        depends on SERIAL_BFIN_UART0
+        help
+          Enable hardware flow control in the driver. Using GPIO emulate the CTS/RTS
+          signal.
+
+config UART0_CTS_PIN
+        int "UART0 CTS pin"
+        depends on BFIN_UART0_CTSRTS
+        default 23
+        help
+          The default pin is GPIO_GP7.
+          Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
+config UART0_RTS_PIN
+        int "UART0 RTS pin"
+        depends on BFIN_UART0_CTSRTS
+        default 22
+        help
+          The default pin is GPIO_GP6.
+          Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
+config SERIAL_BFIN_UART1
+        bool "Enable UART1"
+        depends on SERIAL_BFIN && (BF534 || BF536 || BF537)
+        help
+          Enable UART1
+
+config BFIN_UART1_CTSRTS
+        bool "Enable UART1 hardware flow control"
+        depends on SERIAL_BFIN_UART1
+        help
+          Enable hardware flow control in the driver. Using GPIO emulate the CTS/RTS
+          signal.
+
+config UART1_CTS_PIN
+        int "UART1 CTS pin"
+        depends on BFIN_UART1_CTSRTS
+        default -1
+        help
+          Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
+config UART1_RTS_PIN
+        int "UART1 RTS pin"
+        depends on BFIN_UART1_CTSRTS
+        default -1
+        help
+          Refer to ./include/asm-blackfin/gpio.h to see the GPIO map.
+
 config SERIAL_IMX
         bool "IMX serial port support"
         depends on ARM && ARCH_IMX