ESCC serial driver for conducting sautomated tests in qemu.
Not tested on real hardware. * include/grub/serial.h (grub_serial_port): New field escc_desc. * grub-core/term/ieee1275/escc.c: New file. * grub-core/Makefile.core.def (escc): New module.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
08fd129137
commit
61c42af084
4 changed files with 338 additions and 0 deletions
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@ -1,3 +1,12 @@
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2012-06-08 Vladimir Serbinenko <phcoder@gmail.com>
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ESCC serial driver for conducting sautomated tests in qemu.
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Not tested on real hardware.
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* include/grub/serial.h (grub_serial_port): New field escc_desc.
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* grub-core/term/ieee1275/escc.c: New file.
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* grub-core/Makefile.core.def (escc): New module.
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2012-06-08 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/term/ieee1275/serial.c (do_real_config): Set handle to
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@ -815,6 +815,12 @@ module = {
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enable = powerpc_ieee1275;
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};
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module = {
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name = escc;
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ieee1275 = term/ieee1275/escc.c;
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enable = powerpc_ieee1275;
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};
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module = {
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name = terminal;
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common = commands/terminal.c;
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322
grub-core/term/ieee1275/escc.c
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322
grub-core/term/ieee1275/escc.c
Normal file
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@ -0,0 +1,322 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2012 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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GRUB_MOD_LICENSE ("GPLv3+");
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struct grub_escc_descriptor
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{
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volatile grub_uint8_t *escc_ctrl;
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volatile grub_uint8_t *escc_data;
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};
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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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grub_uint8_t bitsspec;
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grub_uint8_t parity_stop_spec;
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if (port->configured)
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return;
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/* Make sure the port is waiting for address now. */
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(void) *port->escc_desc->escc_ctrl;
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switch (port->config.speed)
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{
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case 57600:
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*port->escc_desc->escc_ctrl = 13;
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*port->escc_desc->escc_ctrl = 0;
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*port->escc_desc->escc_ctrl = 12;
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*port->escc_desc->escc_ctrl = 0;
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*port->escc_desc->escc_ctrl = 14;
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*port->escc_desc->escc_ctrl = 1;
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*port->escc_desc->escc_ctrl = 11;
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*port->escc_desc->escc_ctrl = 0x50;
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break;
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case 38400:
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*port->escc_desc->escc_ctrl = 13;
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*port->escc_desc->escc_ctrl = 0;
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*port->escc_desc->escc_ctrl = 12;
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*port->escc_desc->escc_ctrl = 1;
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*port->escc_desc->escc_ctrl = 14;
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*port->escc_desc->escc_ctrl = 1;
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*port->escc_desc->escc_ctrl = 11;
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*port->escc_desc->escc_ctrl = 0x50;
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break;
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}
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parity_stop_spec = 0;
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switch (port->config.parity)
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{
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case GRUB_SERIAL_PARITY_NONE:
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parity_stop_spec |= 0;
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break;
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case GRUB_SERIAL_PARITY_ODD:
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parity_stop_spec |= 1;
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break;
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case GRUB_SERIAL_PARITY_EVEN:
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parity_stop_spec |= 3;
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break;
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}
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switch (port->config.stop_bits)
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{
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case GRUB_SERIAL_STOP_BITS_1:
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parity_stop_spec |= 0x4;
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break;
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case GRUB_SERIAL_STOP_BITS_1_5:
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parity_stop_spec |= 0x8;
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break;
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case GRUB_SERIAL_STOP_BITS_2:
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parity_stop_spec |= 0xc;
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break;
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}
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*port->escc_desc->escc_ctrl = 4;
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*port->escc_desc->escc_ctrl = 0x40 | parity_stop_spec;
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bitsspec = port->config.word_len - 5;
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bitsspec = ((bitsspec >> 1) | (bitsspec << 1)) & 3;
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*port->escc_desc->escc_ctrl = 3;
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*port->escc_desc->escc_ctrl = (bitsspec << 6) | 0x1;
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port->configured = 1;
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return;
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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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do_real_config (port);
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*port->escc_desc->escc_ctrl = 0;
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if (*port->escc_desc->escc_ctrl & 1)
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return *port->escc_desc->escc_data;
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return -1;
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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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grub_uint64_t endtime;
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do_real_config (port);
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if (port->broken > 5)
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endtime = grub_get_time_ms ();
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else if (port->broken > 1)
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endtime = grub_get_time_ms () + 50;
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else
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endtime = grub_get_time_ms () + 200;
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/* Wait until the transmitter holding register is empty. */
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while (1)
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{
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*port->escc_desc->escc_ctrl = 0;
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if (*port->escc_desc->escc_ctrl & 4)
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break;
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if (grub_get_time_ms () > endtime)
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{
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port->broken++;
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/* There is something wrong. But what can I do? */
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return;
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}
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}
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if (port->broken)
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port->broken--;
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*port->escc_desc->escc_data = c;
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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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if (config->speed != 38400 && config->speed != 57600)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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N_("unsupported serial port speed"));
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if (config->parity != GRUB_SERIAL_PARITY_NONE
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&& config->parity != GRUB_SERIAL_PARITY_ODD
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&& config->parity != GRUB_SERIAL_PARITY_EVEN)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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N_("unsupported serial port parity"));
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if (config->stop_bits != GRUB_SERIAL_STOP_BITS_1
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&& config->stop_bits != GRUB_SERIAL_STOP_BITS_1_5
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&& config->stop_bits != GRUB_SERIAL_STOP_BITS_2)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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N_("unsupported serial port stop bits number"));
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if (config->word_len < 5 || config->word_len > 8)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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N_("unsupported serial port word length"));
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port->config = *config;
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port->configured = 0;
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/* FIXME: should check if the serial terminal was found. */
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return GRUB_ERR_NONE;
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}
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struct grub_serial_driver grub_escc_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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static struct grub_escc_descriptor escc_descs[2];
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static void
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add_device (grub_addr_t addr, int channel)
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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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struct grub_serial_config config =
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{
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.speed = 38400,
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.word_len = 8,
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.parity = GRUB_SERIAL_PARITY_NONE,
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.stop_bits = GRUB_SERIAL_STOP_BITS_1
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};
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escc_descs[channel].escc_ctrl
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= (volatile grub_uint8_t *) (grub_addr_t) addr;
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escc_descs[channel].escc_data = escc_descs[channel].escc_ctrl + 16;
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port = grub_zalloc (sizeof (*port));
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if (!port)
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{
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grub_errno = 0;
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return;
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}
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port->name = grub_xasprintf ("escc-ch-%c", channel + 'a');
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if (!port->name)
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{
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grub_errno = 0;
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return;
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}
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port->escc_desc = &escc_descs[channel];
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port->driver = &grub_escc_driver;
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err = port->driver->configure (port, &config);
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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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}
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GRUB_MOD_INIT (escc)
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{
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char *macio = 0;
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char *escc = 0;
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grub_uint32_t macio_addr[4];
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grub_uint32_t escc_addr[2];
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grub_ieee1275_phandle_t dev;
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auto int find_macio (struct grub_ieee1275_devalias *alias);
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auto int find_escc (struct grub_ieee1275_devalias *alias);
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int find_macio (struct grub_ieee1275_devalias *alias)
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{
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if (grub_strcmp (alias->type, "mac-io") != 0)
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return 0;
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macio = grub_strdup (alias->path);
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return 1;
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}
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int find_escc (struct grub_ieee1275_devalias *alias)
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{
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if (grub_strcmp (alias->type, "escc") != 0)
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return 0;
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escc = grub_strdup (alias->path);
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return 1;
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}
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grub_ieee1275_devices_iterate (find_macio);
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if (!macio)
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return;
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grub_children_iterate (macio, find_escc);
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if (!escc)
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{
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grub_free (macio);
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return;
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}
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if (grub_ieee1275_finddevice (macio, &dev))
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{
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grub_free (macio);
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grub_free (escc);
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return;
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}
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if (grub_ieee1275_get_integer_property (dev, "assigned-addresses",
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macio_addr, sizeof (macio_addr), 0))
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{
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grub_free (macio);
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grub_free (escc);
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return;
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}
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if (grub_ieee1275_finddevice (escc, &dev))
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{
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grub_free (macio);
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grub_free (escc);
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return;
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}
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if (grub_ieee1275_get_integer_property (dev, "reg",
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escc_addr, sizeof (escc_addr), 0))
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{
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grub_free (macio);
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grub_free (escc);
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return;
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}
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add_device (macio_addr[2] + escc_addr[0] + 32, 1);
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add_device (macio_addr[2] + escc_addr[0], 0);
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grub_free (macio);
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grub_free (escc);
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}
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GRUB_MOD_FINI (escc)
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{
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}
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@ -94,6 +94,7 @@ struct grub_serial_port
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struct grub_usb_desc_endp *in_endp;
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struct grub_usb_desc_endp *out_endp;
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};
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struct grub_escc_descriptor *escc_desc;
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#ifdef GRUB_MACHINE_IEEE1275
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struct
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{
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