tty/serial: Add support for Altera serial port

commit e06c93cacb82dd147266fd1bdb2d0a0bd45ff2c1 upstream.

Add support for Altera 8250/16550 compatible serial port.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
[xr: Backported to 3.4: adjust filenames, context]
Signed-off-by: Rui Xiang <rui.xiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
index b8b27b0aca108ebc366fab5133f49c789192f307..3f89cbdc60b61c78257aa7e6eb9374df157a812d 100644 (file)
--- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt
+++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
@@ -10,6 +10,9 @@ Required properties:
        - "ns16850"
        - "nvidia,tegra20-uart"
        - "ibm,qpace-nwp-serial"
+       - "altr,16550-FIFO32"
+       - "altr,16550-FIFO64"
+       - "altr,16550-FIFO128"
        - "serial" if the port type is unknown.
 - reg : offset and length of the register set for the device.
 - interrupts : should contain uart interrupt.

diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index c5d550f28718b4ebfd2523d15600d8c8703e99a3..5fe219142d41e1f50123f214b5db22d3d1fccc6b 100644 (file)
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -288,6 +288,27 @@ static const struct serial8250_config uart_config[] = {
                .tx_loadsz      = 1024,
                .flags          = UART_CAP_HFIFO,
        },
+       [PORT_ALTR_16550_F32] = {
+               .name           = "Altera 16550 FIFO32",
+               .fifo_size      = 32,
+               .tx_loadsz      = 32,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
+       [PORT_ALTR_16550_F64] = {
+               .name           = "Altera 16550 FIFO64",
+               .fifo_size      = 64,
+               .tx_loadsz      = 64,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
+       [PORT_ALTR_16550_F128] = {
+               .name           = "Altera 16550 FIFO128",
+               .fifo_size      = 128,
+               .tx_loadsz      = 128,
+               .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+               .flags          = UART_CAP_FIFO | UART_CAP_AFE,
+       },
 };
 
 #if defined(CONFIG_MIPS_ALCHEMY)

diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index e8c9cee07d00e2b7e9b4dfeb3a5119475d21eacc..6563cad09293c3dfac9e3aec5f68fd29b375553b 100644 (file)
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -182,6 +182,12 @@ static struct of_device_id __devinitdata of_platform_serial_table[] = {
        { .compatible = "ns16750",  .data = (void *)PORT_16750, },
        { .compatible = "ns16850",  .data = (void *)PORT_16850, },
        { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, },
+       { .compatible = "altr,16550-FIFO32",
+               .data = (void *)PORT_ALTR_16550_F32, },
+       { .compatible = "altr,16550-FIFO64",
+               .data = (void *)PORT_ALTR_16550_F64, },
+       { .compatible = "altr,16550-FIFO128",
+               .data = (void *)PORT_ALTR_16550_F128, },
 #ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL
        { .compatible = "ibm,qpace-nwp-serial",
                .data = (void *)PORT_NWPSERIAL, },

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index ce132b5d3c92082e2f0f96c3e78b9f23a4a3dc82..60f55645af32c2db859be5ab50871a6590d3f645 100644 (file)
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -48,7 +48,10 @@
 #define PORT_TEGRA     20      /* NVIDIA Tegra internal UART */
 #define PORT_XR17D15X  21      /* Exar XR17D15x UART */
 #define PORT_BRCM_TRUMANAGE    25
-#define PORT_MAX_8250  25      /* max port ID */
+#define PORT_ALTR_16550_F32 26 /* Altera 16550 UART with 32 FIFOs */
+#define PORT_ALTR_16550_F64 27 /* Altera 16550 UART with 64 FIFOs */
+#define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
+#define PORT_MAX_8250  28      /* max port ID */
 
 /*
  * ARM specific type numbers.  These are not currently guaranteed