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usbserial basic support. Works in qemu

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-07-18 12:53:35 +02:00
parent cbf41813b3
commit 34364df689
6 changed files with 189 additions and 181 deletions
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3
bus/usb/usb.c
View file

@ -269,6 +269,9 @@ void grub_usb_device_attach (grub_usb_device_t dev)
case GRUB_USB_CLASS_HID:
grub_dl_load ("usb_keyboard");
break;
case 0xff:
grub_dl_load ("usbserial");
break;
}
}
}

6
conf/i386-pc.rmk
View file

@ -195,6 +195,12 @@ usb_mod_SOURCES = bus/usb/usb.c bus/usb/usbtrans.c bus/usb/usbhub.c
usb_mod_CFLAGS = $(COMMON_CFLAGS)
usb_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For serial.mod.
pkglib_MODULES += usbserial.mod
usbserial_mod_SOURCES = term/usbserial.c
usbserial_mod_CFLAGS = $(COMMON_CFLAGS)
usbserial_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For usbtest.mod
usbtest_mod_SOURCES = commands/usbtest.c
usbtest_mod_CFLAGS = $(COMMON_CFLAGS)

24
include/grub/serial.h
View file

@ -47,6 +47,7 @@ struct grub_serial_port
unsigned int parity;
unsigned short stop_bits;
struct grub_serial_driver *driver;
int configured;
/* This should be void *data but since serial is useful as an early console
when malloc isn't available it's a union.
*/
@ -55,9 +56,9 @@ struct grub_serial_port
grub_port_t port;
struct
{
grub_usb_device_t dev;
int in_endp;
int out_endp;
grub_usb_device_t usbdev;
struct grub_usb_desc_endp *in_endp;
struct grub_usb_desc_endp *out_endp;
};
};
};
@ -81,18 +82,19 @@ void grub_serial_unregister (struct grub_serial_port *port);
#define UART_1_STOP_BIT 0x00
#define UART_2_STOP_BITS 0x04
static inline void
grub_serial_fill_defaults (struct grub_serial_port *port)
{
/* Set default settings. */
static inline grub_err_t
grub_serial_config_defaults (struct grub_serial_port *port)
{
return port->driver->configure (port,
#ifdef GRUB_MACHINE_MIPS_YEELOONG
port->speed = 115200;
115200,
#else
port->speed = 9600;
9600,
#endif
port->word_len = UART_8BITS_WORD;
port->parity = UART_NO_PARITY;
port->stop_bits = UART_1_STOP_BIT;
UART_8BITS_WORD, UART_NO_PARITY,
UART_1_STOP_BIT);
}
void grub_ns8250_init (void);

124
term/ns8250.c
View file

@ -34,33 +34,6 @@ static const grub_port_t serial_hw_io_addr[] = GRUB_MACHINE_SERIAL_PORTS;
#define GRUB_SERIAL_PORT_NUM (ARRAY_SIZE(serial_hw_io_addr))
#endif
/* Fetch a key. */
static int
serial_hw_fetch (struct grub_serial_port *port)
{
if (grub_inb (port->port + UART_LSR) & UART_DATA_READY)
return grub_inb (port->port + UART_RX);
return -1;
}
/* Put a character. */
static void
serial_hw_put (struct grub_serial_port *port, const int c)
{
unsigned int timeout = 100000;
/* Wait until the transmitter holding register is empty. */
while ((grub_inb (port->port + UART_LSR) & UART_EMPTY_TRANSMITTER) == 0)
{
if (--timeout == 0)
/* There is something wrong. But what can I do? */
return;
}
grub_outb (c, port->port + UART_TX);
}
/* Convert speed to divisor. */
static unsigned short
serial_get_divisor (unsigned int speed)
@ -99,29 +72,19 @@ serial_get_divisor (unsigned int speed)
return 0;
}
/* Initialize a serial device. PORT is the port number for a serial device.
SPEED is a DTE-DTE speed which must be one of these: 2400, 4800, 9600,
19200, 38400, 57600 and 115200. WORD_LEN is the word length to be used
for the device. Likewise, PARITY is the type of the parity and
STOP_BIT_LEN is the length of the stop bit. The possible values for
WORD_LEN, PARITY and STOP_BIT_LEN are defined in the header file as
macros. */
static grub_err_t
serial_hw_configure (struct grub_serial_port *port,
unsigned speed, unsigned short word_len,
unsigned int parity, unsigned short stop_bits)
static void
do_real_config (struct grub_serial_port *port)
{
int divisor;
unsigned char status = 0;
unsigned short divisor;
divisor = serial_get_divisor (speed);
if (port->configured)
return;
divisor = serial_get_divisor (port->speed);
/* Shouldn't happen. */
if (divisor == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "bad speed");
port->speed = speed;
port->word_len = word_len;
port->parity = parity;
port->stop_bits = stop_bits;
return;
/* Turn off the interrupt. */
grub_outb (0, port->port + UART_IER);
@ -153,7 +116,66 @@ serial_hw_configure (struct grub_serial_port *port,
#endif
/* Drain the input buffer. */
while (serial_hw_fetch (port) != -1);
while (grub_inb (port->port + UART_LSR) & UART_DATA_READY)
grub_inb (port->port + UART_RX);
port->configured = 1;
}
/* Fetch a key. */
static int
serial_hw_fetch (struct grub_serial_port *port)
{
do_real_config (port);
if (grub_inb (port->port + UART_LSR) & UART_DATA_READY)
return grub_inb (port->port + UART_RX);
return -1;
}
/* Put a character. */
static void
serial_hw_put (struct grub_serial_port *port, const int c)
{
unsigned int timeout = 100000;
do_real_config (port);
/* Wait until the transmitter holding register is empty. */
while ((grub_inb (port->port + UART_LSR) & UART_EMPTY_TRANSMITTER) == 0)
{
if (--timeout == 0)
/* There is something wrong. But what can I do? */
return;
}
grub_outb (c, port->port + UART_TX);
}
/* Initialize a serial device. PORT is the port number for a serial device.
SPEED is a DTE-DTE speed which must be one of these: 2400, 4800, 9600,
19200, 38400, 57600 and 115200. WORD_LEN is the word length to be used
for the device. Likewise, PARITY is the type of the parity and
STOP_BIT_LEN is the length of the stop bit. The possible values for
WORD_LEN, PARITY and STOP_BIT_LEN are defined in the header file as
macros. */
static grub_err_t
serial_hw_configure (struct grub_serial_port *port,
unsigned speed, unsigned short word_len,
unsigned int parity, unsigned short stop_bits)
{
unsigned short divisor;
divisor = serial_get_divisor (speed);
if (divisor == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "bad speed");
port->speed = speed;
port->word_len = word_len;
port->parity = parity;
port->stop_bits = stop_bits;
port->configured = 0;
/* FIXME: should check if the serial terminal was found. */
@ -177,11 +199,15 @@ grub_ns8250_init (void)
for (i = 0; i < GRUB_SERIAL_PORT_NUM; i++)
if (serial_hw_io_addr[i])
{
grub_err_t err;
grub_snprintf (com_names[i], sizeof (com_names[i]), "com%d", i);
com_ports[i].name = com_names[i];
com_ports[i].driver = &grub_ns8250_driver;
grub_serial_fill_defaults (&com_ports[i]);
com_ports[i].port = serial_hw_io_addr[i];
err = grub_serial_config_defaults (&com_ports[i]);
if (err)
grub_print_error ();
grub_serial_register (&com_ports[i]);
}
}
@ -204,7 +230,7 @@ grub_serial_ns8250_add_port (grub_port_t port)
return NULL;
}
p->driver = &grub_ns8250_driver;
grub_serial_fill_defaults (p);
grub_serial_config_defaults (p);
p->port = port;
grub_serial_register (p);

1
term/serial.c
View file

@ -315,7 +315,6 @@ grub_serial_unregister (struct grub_serial_port *port)
/* FIXME */
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(serial)

212
term/usbserial.c
View file

@ -1,6 +1,6 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009 Free Software Foundation, Inc.
* Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -16,150 +16,122 @@
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/machine/memory.h>
#include <grub/serial.h>
#include <grub/term.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/terminfo.h>
#include <grub/cpu/io.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
static unsigned int registered = 0;
/* Argument options. */
static const struct grub_arg_option options[] =
{
{"unit", 'u', 0, N_("Set the serial unit."), 0, ARG_TYPE_INT},
{"speed", 's', 0, N_("Set the serial port speed."), 0, ARG_TYPE_INT},
{"word", 'w', 0, N_("Set the serial port word length."), 0, ARG_TYPE_INT},
{"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},
{0, 0, 0, 0, 0, 0}
};
/* Serial port settings. */
struct usbserial_port
{
grub_usb_device_t usbdev;
int in_endp;
int out_endp;
unsigned short divisor;
unsigned short word_len;
unsigned int parity;
unsigned short stop_bits;
};
/* Serial port settings. */
static struct serial_port serial_settings;
#include <grub/mm.h>
#include <grub/usb.h>
/* Fetch a key. */
static int
serial_hw_fetch (void)
usbserial_hw_fetch (struct grub_serial_port *port)
{
/* FIXME */
return -1;
char cc[3];
grub_usb_err_t err;
err = grub_usb_bulk_read (port->usbdev, port->in_endp->endp_addr, 2, cc);
if (err != GRUB_USB_ERR_NAK)
return -1;
err = grub_usb_bulk_read (port->usbdev, port->in_endp->endp_addr, 3, cc);
if (err != GRUB_USB_ERR_NONE)
return -1;
return cc[2];
}
/* Put a character. */
static void
usbserial_hw_put (struct usbserial_port *port, const int c)
usbserial_hw_put (struct grub_serial_port *port, const int c)
{
char cc = c;
grub_usb_bulk_write (port->usbdev, port->out_endp, 1, &cc);
grub_usb_bulk_write (port->usbdev, port->out_endp->endp_addr, 1, &cc);
}
static grub_uint16_t
grub_serial_getwh (struct grub_term_output *term __attribute__ ((unused)))
/* FIXME */
static grub_err_t
usbserial_hw_configure (struct grub_serial_port *port,
unsigned speed, unsigned short word_len,
unsigned int parity, unsigned short stop_bits)
{
const grub_uint8_t TEXT_WIDTH = 80;
const grub_uint8_t TEXT_HEIGHT = 24;
return (TEXT_WIDTH << 8) | TEXT_HEIGHT;
port->speed = speed;
port->word_len = word_len;
port->parity = parity;
port->stop_bits = stop_bits;
port->configured = 0;
return GRUB_ERR_NONE;
}
struct grub_terminfo_input_state grub_serial_terminfo_input =
{
.readkey = serial_hw_fetch
};
struct grub_terminfo_output_state grub_serial_terminfo_output =
static struct grub_serial_driver grub_usbserial_driver =
{
.configure = usbserial_hw_configure,
.fetch = usbserial_hw_fetch,
.put = usbserial_hw_put
};
static struct grub_term_input grub_serial_term_input =
static int
grub_usbserial_attach (grub_usb_device_t usbdev, int configno, int interfno)
{
.name = "usbserial",
.init = grub_terminfo_input_init,
.checkkey = grub_terminfo_checkkey,
.getkey = grub_terminfo_getkey,
.data = &grub_serial_terminfo_input
};
static struct grub_serial_port *port;
int j;
struct grub_usb_desc_if *interf
= usbdev->config[configno].interf[interfno].descif;
static struct grub_term_output grub_serial_term_output =
{
.name = "usbserial",
.putchar = grub_terminfo_putchar,
.getwh = grub_serial_getwh,
.getxy = grub_terminfo_getxy,
.gotoxy = grub_terminfo_gotoxy,
.cls = grub_terminfo_cls,
.setcolorstate = grub_terminfo_setcolorstate,
.setcursor = grub_terminfo_setcursor,
.flags = GRUB_TERM_CODE_TYPE_ASCII,
.data = &grub_serial_terminfo_output,
.normal_color = GRUB_TERM_DEFAULT_NORMAL_COLOR,
.highlight_color = GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR,
};
static grub_extcmd_t cmd;
GRUB_MOD_INIT(serial)
{
cmd = grub_register_extcmd ("serial", grub_cmd_serial,
GRUB_COMMAND_FLAG_BOTH,
N_("[OPTIONS...]"),
N_("Configure serial port."), options);
/* Set default settings. */
serial_settings.port = serial_hw_get_port (0);
#ifdef GRUB_MACHINE_MIPS_YEELOONG
serial_settings.divisor = serial_get_divisor (115200);
#else
serial_settings.divisor = serial_get_divisor (9600);
#endif
serial_settings.word_len = UART_8BITS_WORD;
serial_settings.parity = UART_NO_PARITY;
serial_settings.stop_bits = UART_1_STOP_BIT;
#ifdef GRUB_MACHINE_MIPS_YEELOONG
{
grub_err_t hwiniterr;
hwiniterr = serial_hw_init ();
if (hwiniterr == GRUB_ERR_NONE)
{
grub_term_register_input_active ("serial", &grub_serial_term_input);
grub_term_register_output_active ("serial", &grub_serial_term_output);
registered = 1;
}
}
#endif
}
GRUB_MOD_FINI(serial)
{
grub_unregister_extcmd (cmd);
if (registered == 1) /* Unregister terminal only if registered. */
port = grub_malloc (sizeof (*port));
if (!port)
{
grub_term_unregister_input (&grub_serial_term_input);
grub_term_unregister_output (&grub_serial_term_output);
grub_terminfo_output_unregister (&grub_serial_term_output);
grub_print_error ();
return 0;
}
port->name = grub_xasprintf ("usb%d", usbdev->addr);
if (!port->name)
{
grub_free (port);
grub_print_error ();
return 0;
}
port->usbdev = usbdev;
port->driver = &grub_usbserial_driver;
for (j = 0; j < interf->endpointcnt; j++)
{
struct grub_usb_desc_endp *endp;
endp = &usbdev->config[0].interf[interfno].descendp[j];
if ((endp->endp_addr & 128) && (endp->attrib & 3) == 2)
{
/* Bulk IN endpoint. */
port->in_endp = endp;
}
else if (!(endp->endp_addr & 128) && (endp->attrib & 3) == 2)
{
/* Bulk OUT endpoint. */
port->out_endp = endp;
}
}
if (!port->out_endp || !port->in_endp)
{
grub_free (port->name);
grub_free (port);
return 0;
}
grub_serial_config_defaults (port);
grub_serial_register (port);
return 1;
}
struct grub_usb_attach_desc attach_hook =
{
.class = 0xff,
.hook = grub_usbserial_attach
};
GRUB_MOD_INIT(usbserial)
{
grub_usb_register_attach_hook_class (&attach_hook);
}