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* grub-core/term/serial.c: Add option for enabling/disabling

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RTS/CTS flow control.
This commit is contained in:
Vladimir Serbinenko 2013-11-08 18:20:20 +01:00
parent 2dc1eb6cbf
commit 9f8acdaa5d
8 changed files with 48 additions and 17 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
2013-11-08 Vladimir Serbinenko <phcoder@gmail.com>
* b/grub-core/term/serial.c: Add option for enabling/disabling
RTS/CTS flow control.
2013-11-08 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/lib/libgcrypt/cipher/idea.c (mul_inv): Remove signed

6
grub-core/bus/usb/serial/ftdi.c
View file

@ -91,11 +91,13 @@ real_config (struct grub_serial_port *port)
grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT,
GRUB_FTDI_MODEM_CTRL,
GRUB_FTDI_MODEM_CTRL_DTRRTS, 0, 0, 0);
port->config.rtscts ? GRUB_FTDI_MODEM_CTRL_DTRRTS : 0,
0, 0, 0);
grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT,
GRUB_FTDI_FLOW_CTRL,
GRUB_FTDI_FLOW_CTRL_DTRRTS, 0, 0, 0);
port->config.rtscts ? GRUB_FTDI_FLOW_CTRL_DTRRTS : 0,
0, 0, 0);
divisor = get_divisor (port->config.speed);
grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT,

2
grub-core/bus/usb/serial/pl2303.c
View file

@ -125,7 +125,7 @@ real_config (struct grub_serial_port *port)
0x22, 3, 0, 0, 0);
grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT,
1, 0, 0x61, 0, 0);
1, 0, port->config.rtscts ? 0x61 : 0, 0, 0);
port->configured = 1;
}

4
grub-core/term/efi/serial.c
View file

@ -58,6 +58,10 @@ do_real_config (struct grub_serial_port *port)
stop_bits[port->config.stop_bits]);
if (status != GRUB_EFI_SUCCESS)
port->broken = 1;
status = efi_call_2 (port->interface->set_control_bits, port->interface,
port->config.rtscts ? 0x4002 : 0x2);
port->configured = 1;
}

26
grub-core/term/ns8250.c
View file

@ -107,20 +107,22 @@ do_real_config (struct grub_serial_port *port)
| stop_bits[port->config.stop_bits]);
grub_outb (status, port->port + UART_LCR);
/* On Loongson machines serial port has only 3 wires. */
#ifndef GRUB_MACHINE_MIPS_LOONGSON
/* Enable the FIFO. */
grub_outb (UART_ENABLE_FIFO_TRIGGER1, port->port + UART_FCR);
if (port->config.rtscts)
{
/* Enable the FIFO. */
grub_outb (UART_ENABLE_FIFO_TRIGGER1, port->port + UART_FCR);
/* Turn on DTR and RTS. */
grub_outb (UART_ENABLE_DTRRTS, port->port + UART_MCR);
#else
/* Enable the FIFO. */
grub_outb (UART_ENABLE_FIFO_TRIGGER14, port->port + UART_FCR);
/* Turn on DTR and RTS. */
grub_outb (UART_ENABLE_DTRRTS, port->port + UART_MCR);
}
else
{
/* Enable the FIFO. */
grub_outb (UART_ENABLE_FIFO_TRIGGER14, port->port + UART_FCR);
/* Turn on DTR, RTS, and OUT2. */
grub_outb (UART_ENABLE_DTRRTS | UART_ENABLE_OUT2, port->port + UART_MCR);
#endif
/* Turn on DTR, RTS, and OUT2. */
grub_outb (UART_ENABLE_DTRRTS | UART_ENABLE_OUT2, port->port + UART_MCR);
}
/* Drain the input buffer. */
endtime = grub_get_time_ms () + 1000;

15
grub-core/term/serial.c
View file

@ -47,7 +47,8 @@ enum
OPTION_WORD,
OPTION_PARITY,
OPTION_STOP,
OPTION_BASE_CLOCK
OPTION_BASE_CLOCK,
OPTION_RTSCTS
};
/* Argument options. */
@ -60,6 +61,7 @@ static const struct grub_arg_option options[] =
{"parity", 'r', 0, N_("Set the serial port parity."), 0, ARG_TYPE_STRING},
{"stop", 't', 0, N_("Set the serial port stop bits."), 0, ARG_TYPE_INT},
{"base-clock", 'b', 0, N_("Set the base clock."), 0, ARG_TYPE_STRING},
{"rtscts", 'f', 0, N_("Enable/disable RTS/CTS."), "on|off", ARG_TYPE_STRING},
{0, 0, 0, 0, 0, 0}
};
@ -237,6 +239,17 @@ grub_cmd_serial (grub_extcmd_context_t ctxt, int argc, char **args)
N_("unsupported serial port parity"));
}
if (state[OPTION_RTSCTS].set)
{
if (grub_strcmp (state[OPTION_PARITY].arg, "on") == 0)
config.rtscts = 1;
if (grub_strcmp (state[OPTION_PARITY].arg, "off") == 0)
config.rtscts = 0;
else
return grub_error (GRUB_ERR_BAD_ARGUMENT,
N_("unsupported serial port flow"));
}
if (state[OPTION_STOP].set)
{
if (! grub_strcmp (state[OPTION_STOP].arg, "1"))

3
include/grub/efi/api.h
View file

@ -1244,7 +1244,8 @@ struct grub_efi_serial_io_interface
grub_efi_parity_type_t parity,
grub_uint8_t word_len,
grub_efi_stop_bits_t stop_bits);
void (*set_control_bits) (void);
grub_efi_status_t (*set_control_bits) (struct grub_efi_serial_io_interface *this,
grub_efi_uint32_t flags);
void (*get_control_bits) (void);
grub_efi_status_t (*write) (struct grub_efi_serial_io_interface *this,
grub_efi_uintn_t *buf_size,

4
include/grub/serial.h
View file

@ -68,6 +68,7 @@ struct grub_serial_config
grub_serial_parity_t parity;
grub_serial_stop_bits_t stop_bits;
grub_uint64_t base_clock;
int rtscts;
};
struct grub_serial_port
@ -159,8 +160,11 @@ grub_serial_config_defaults (struct grub_serial_port *port)
{
#ifdef GRUB_MACHINE_MIPS_LOONGSON
.speed = 115200,
/* On Loongson machines serial port has only 3 wires. */
.rtscts = 0,
#else
.speed = 9600,
.rtscts = 1,
#endif
.word_len = 8,
.parity = GRUB_SERIAL_PARITY_NONE,