147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/serial.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/time.h>
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#include <grub/i18n.h>
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#include <grub/arc/arc.h>
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static void
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do_real_config (struct grub_serial_port *port)
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{
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char *name;
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if (port->configured)
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return;
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name = grub_arc_alt_name_to_norm (port->name, "");
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if (GRUB_ARC_FIRMWARE_VECTOR->open (name,GRUB_ARC_FILE_ACCESS_OPEN_RW,
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&port->handle))
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port->handle_valid = 0;
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else
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port->handle_valid = 1;
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port->configured = 1;
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}
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/* Fetch a key. */
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static int
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serial_hw_fetch (struct grub_serial_port *port)
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{
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unsigned long actual;
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char c;
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do_real_config (port);
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if (!port->handle_valid)
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return -1;
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if (GRUB_ARC_FIRMWARE_VECTOR->read (port->handle, &c,
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1, &actual) || actual <= 0)
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return -1;
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return c;
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}
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/* Put a character. */
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static void
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serial_hw_put (struct grub_serial_port *port, const int c)
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{
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unsigned long actual;
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char c0 = c;
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do_real_config (port);
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if (!port->handle_valid)
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return;
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GRUB_ARC_FIRMWARE_VECTOR->write (port->handle, &c0,
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1, &actual);
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}
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/* Initialize a serial device. PORT is the port number for a serial device.
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SPEED is a DTE-DTE speed which must be one of these: 2400, 4800, 9600,
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19200, 38400, 57600 and 115200. WORD_LEN is the word length to be used
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for the device. Likewise, PARITY is the type of the parity and
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STOP_BIT_LEN is the length of the stop bit. The possible values for
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WORD_LEN, PARITY and STOP_BIT_LEN are defined in the header file as
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macros. */
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static grub_err_t
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serial_hw_configure (struct grub_serial_port *port __attribute__ ((unused)),
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struct grub_serial_config *config __attribute__ ((unused)))
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{
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/* FIXME: no ARC serial config available. */
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return GRUB_ERR_NONE;
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}
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struct grub_serial_driver grub_arcserial_driver =
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{
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.configure = serial_hw_configure,
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.fetch = serial_hw_fetch,
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.put = serial_hw_put
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};
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const char *
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grub_arcserial_add_port (const char *path)
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{
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struct grub_serial_port *port;
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grub_err_t err;
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port = grub_zalloc (sizeof (*port));
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if (!port)
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return NULL;
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port->name = grub_strdup (path);
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if (!port->name)
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return NULL;
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port->driver = &grub_arcserial_driver;
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err = grub_serial_config_defaults (port);
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if (err)
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grub_print_error ();
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grub_serial_register (port);
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return port->name;
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}
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static int
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dev_iterate (const char *name,
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const struct grub_arc_component *comp __attribute__ ((unused)),
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void *data __attribute__ ((unused)))
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{
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/* We should check consolein/consoleout flags as
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well but some implementations are buggy. */
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if ((comp->flags & (GRUB_ARC_COMPONENT_FLAG_IN | GRUB_ARC_COMPONENT_FLAG_OUT))
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!= (GRUB_ARC_COMPONENT_FLAG_IN | GRUB_ARC_COMPONENT_FLAG_OUT))
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return 0;
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if (!grub_arc_is_device_serial (name, 1))
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return 0;
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grub_arcserial_add_port (name);
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return 0;
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}
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void
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grub_arcserial_init (void)
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{
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grub_arc_iterate_devs (dev_iterate, 0, 1);
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}
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