efi: add serial driver support
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@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Jean-Christophe PLAGNIOL-VILLARD
Sascha Hauer
parent
6518b21c6c
commit
5f03ddd47d
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -0,0 +1,221 @@
|
|||
/*
|
||||
* Copyright (C) 2017 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
|
||||
*
|
||||
* Under GPLv2 Only
|
||||
*/
|
||||
|
||||
#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);
|
||||
Loading…
Reference in New Issue