So now we can stop to use the efi-stdio as this driver
print on the Framebuffer and the serial at the same time.
This is specially usefull if we want to use the framebuffer via efi-gop for
something else.
Do not forget to disable the efi-stdio device before enabling the console
otherwise you will get double printing.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
drivers/serial/Kconfig | 4 +
drivers/serial/Makefile | 1 +
drivers/serial/serial_efi.c | 241 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 246 insertions(+)
create mode 100644 drivers/serial/serial_efi.c
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index ced30530a..cfddc2ee9 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -21,6 +21,10 @@ config DRIVER_SERIAL_AR933X
If you have an Atheros AR933X SOC based board and want to use the
built-in UART of the SoC, say Y to this option.
+config DRIVER_SERIAL_EFI
+ bool "EFI serial"
+ depends on EFI_BOOTUP
+
config DRIVER_SERIAL_IMX
depends on ARCH_IMX
default y
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 7d1bae195..3d9f735ed 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_DRIVER_SERIAL_ARM_DCC) += arm_dcc.o
obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o
obj-$(CONFIG_DRIVER_SERIAL_AR933X) += serial_ar933x.o
+obj-$(CONFIG_DRIVER_SERIAL_EFI) += serial_efi.o
obj-$(CONFIG_DRIVER_SERIAL_IMX) += serial_imx.o
obj-$(CONFIG_DRIVER_SERIAL_STM378X) += stm-serial.o
obj-$(CONFIG_DRIVER_SERIAL_ATMEL) += atmel.o
diff --git a/drivers/serial/serial_efi.c b/drivers/serial/serial_efi.c
new file mode 100644
index 000000000..35387bfd5
--- /dev/null
+++ b/drivers/serial/serial_efi.c
@@ -0,0 +1,241 @@
+/*
+ * (C) Copyright 2000
+ * Rob Taylor, Flying Pig Systems. robt@xxxxxxxxxxxxx.
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@xxxxxxx>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/* Simple U-Boot driver for the PrimeCell PL010/PL011 UARTs */
+
+#include <common.h>
+#include <driver.h>
+#include <init.h>
+#include <malloc.h>
+#include <efi.h>
+#include <efi/efi.h>
+#include <efi/efi-device.h>
+
+//
+// define for Control bits, grouped by read only, write only, and read write
+//
+//
+// Read Only
+//
+#define EFI_SERIAL_CLEAR_TO_SEND 0x00000010
+#define EFI_SERIAL_DATA_SET_READY 0x00000020
+#define EFI_SERIAL_RING_INDICATE 0x00000040
+#define EFI_SERIAL_CARRIER_DETECT 0x00000080
+#define EFI_SERIAL_INPUT_BUFFER_EMPTY 0x00000100
+#define EFI_SERIAL_OUTPUT_BUFFER_EMPTY 0x00000200
+
+//
+// Write Only
+//
+#define EFI_SERIAL_REQUEST_TO_SEND 0x00000002
+#define EFI_SERIAL_DATA_TERMINAL_READY 0x00000001
+
+//
+// Read Write
+//
+#define EFI_SERIAL_HARDWARE_LOOPBACK_ENABLE 0x00001000
+#define EFI_SERIAL_SOFTWARE_LOOPBACK_ENABLE 0x00002000
+#define EFI_SERIAL_HARDWARE_FLOW_CONTROL_ENABLE 0x00004000
+
+typedef enum {
+ DefaultParity,
+ NoParity,
+ EvenParity,
+ OddParity,
+ MarkParity,
+ SpaceParity
+} efi_parity_type;
+
+typedef enum {
+ DefaultStopBits,
+ OneStopBit,
+ OneFiveStopBits,
+ TwoStopBits
+} efi_stop_bits_type;
+
+struct efi_serial_io_mode {
+ uint32_t controlmask;
+ uint32_t timeout;
+ uint64_t baudrate;
+ uint32_t receivefifodepth;
+ uint32_t databits;
+ uint32_t parity;
+ uint32_t stopbits;
+};
+
+struct efi_serial_io_protocol {
+ uint32_t revision;
+
+ efi_status_t (EFIAPI *reset) (struct efi_serial_io_protocol *This);
+ efi_status_t (EFIAPI *set_attributes) (struct efi_serial_io_protocol *This,
+ uint64_t baudrate, uint32_t receivefifodepth,
+ uint32_t timeout, efi_parity_type parity,
+ uint8_t databits, efi_stop_bits_type stopbits);
+ efi_status_t (EFIAPI *setcontrol) (struct efi_serial_io_protocol *This,
+ uint32_t control);
+ efi_status_t (EFIAPI *getcontrol) (struct efi_serial_io_protocol *This,
+ uint32_t *control);
+ efi_status_t (EFIAPI *write) (struct efi_serial_io_protocol *This,
+ unsigned long *buffersize, void *buffer);
+ efi_status_t (EFIAPI *read) (struct efi_serial_io_protocol *This,
+ unsigned long *buffersize, void *buffer);
+
+ struct efi_serial_io_mode *mode;
+};
+
+/*
+ * We wrap our port structure around the generic console_device.
+ */
+struct efi_serial_port {
+ struct efi_serial_io_protocol *serial;
+ struct console_device uart; /* uart */
+ struct efi_device *efidev;
+};
+
+static inline struct efi_serial_port *
+to_efi_serial_port(struct console_device *uart)
+{
+ return container_of(uart, struct efi_serial_port, uart);
+}
+
+static int efi_serial_setbaudrate(struct console_device *cdev, int baudrate)
+{
+ struct efi_serial_port *uart = to_efi_serial_port(cdev);
+ struct efi_serial_io_protocol *serial = uart->serial;
+ efi_status_t efiret;
+
+ efiret = serial->set_attributes(serial, baudrate, 0, 0, NoParity, 8,
+ OneStopBit);
+ if (EFI_ERROR(efiret))
+ return -efi_errno(efiret);
+
+ return 0;
+}
+
+static void efi_serial_putc(struct console_device *cdev, char c)
+{
+ struct efi_serial_port *uart = to_efi_serial_port(cdev);
+ struct efi_serial_io_protocol *serial = uart->serial;
+ uint32_t control;
+ efi_status_t efiret;
+ unsigned long buffersize = sizeof(char);
+
+ do {
+ efiret = serial->getcontrol(serial, &control);
+ if (EFI_ERROR(efiret))
+ return;
+
+ } while(!(control & EFI_SERIAL_CLEAR_TO_SEND));
+
+ serial->write(serial, &buffersize, &c);
+}
+
+static int efi_serial_puts(struct console_device *cdev, const char *s)
+{
+ struct efi_serial_port *uart = to_efi_serial_port(cdev);
+ struct efi_serial_io_protocol *serial = uart->serial;
+ uint32_t control;
+ efi_status_t efiret;
+ unsigned long buffersize = strlen(s) * sizeof(char);
+
+ do {
+ efiret = serial->getcontrol(serial, &control);
+ if (EFI_ERROR(efiret))
+ return 0;
+
+ } while(!(control & EFI_SERIAL_CLEAR_TO_SEND));
+
+ serial->write(serial, &buffersize, (void*)s);
+
+ return strlen(s);
+}
+
+static int efi_serial_getc(struct console_device *cdev)
+{
+ struct efi_serial_port *uart = to_efi_serial_port(cdev);
+ struct efi_serial_io_protocol *serial = uart->serial;
+ uint32_t control;
+ efi_status_t efiret;
+ unsigned long buffersize = sizeof(char);
+ char c;
+
+ do {
+ efiret = serial->getcontrol(serial, &control);
+ if (EFI_ERROR(efiret))
+ return (int)-1;
+
+ } while(!(control & EFI_SERIAL_DATA_SET_READY));
+
+ serial->read(serial, &buffersize, &c);
+
+ return (int)c;
+}
+
+static int efi_serial_tstc(struct console_device *cdev)
+{
+ struct efi_serial_port *uart = to_efi_serial_port(cdev);
+ struct efi_serial_io_protocol *serial = uart->serial;
+ uint32_t control;
+ efi_status_t efiret;
+
+ efiret = serial->getcontrol(serial, &control);
+ if (EFI_ERROR(efiret))
+ return 0;
+
+ return !(control & EFI_SERIAL_INPUT_BUFFER_EMPTY);
+}
+
+static int efi_serial_probe(struct efi_device *efidev)
+{
+ struct efi_serial_port *uart;
+ struct console_device *cdev;
+
+ uart = xzalloc(sizeof(struct efi_serial_port));
+
+ cdev = &uart->uart;
+ cdev->dev = &efidev->dev;
+ cdev->tstc = efi_serial_tstc;
+ cdev->putc = efi_serial_putc;
+ cdev->puts = efi_serial_puts;
+ cdev->getc = efi_serial_getc;
+ cdev->setbrg = efi_serial_setbaudrate;
+
+ uart->serial = efidev->protocol;
+
+ uart->serial->reset(uart->serial);
+
+ /* Enable UART */
+
+ console_register(cdev);
+
+ return 0;
+}
+
+static struct efi_driver efi_serial_driver = {
+ .driver = {
+ .name = "efi-serial",
+ },
+ .probe = efi_serial_probe,
+ .guid = EFI_SERIAL_IO_PROTOCOL_GUID,
+};
+device_efi_driver(efi_serial_driver);
--
2.11.0
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