bad: Introduce alpaca support

Introduce support for controlling boards using an alpaca interface.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Makefile

@@ -11,7 +11,7 @@ LDFLAGS := -ludev -lyaml
 CLIENT_SRCS := cdba.c circ_buf.c
 CLIENT_OBJS := $(CLIENT_SRCS:.c=.o)
 
-CDBA_SRCS := bad.c cdb_assist.c circ_buf.c conmux.c device.c device_parser.c fastboot.c
+CDBA_SRCS := bad.c cdb_assist.c circ_buf.c conmux.c device.c device_parser.c fastboot.c alpaca.c
 CDBA_OBJS := $(CDBA_SRCS:.c=.o)
 
 $(CLIENT): $(CLIENT_OBJS)

alpaca.c

@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2018, Linaro Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include "bad.h"
+#include "alpaca.h"
+
+struct alpaca {
+	int alpaca_fd;
+	int console_fd;
+
+	struct termios alpaca_tios;
+	struct termios console_tios;
+};
+
+static int alpaca_console_data(int fd, void *data)
+{
+	struct msg hdr;
+	char buf[128];
+	ssize_t n;
+
+	n = read(fd, buf, sizeof(buf));
+	if (n < 0)
+		return n;
+
+	hdr.type = MSG_CONSOLE;
+	hdr.len = n;
+	write(STDOUT_FILENO, &hdr, sizeof(hdr));
+	write(STDOUT_FILENO, buf, n);
+
+	return 0;
+}
+
+static int alpaca_open_tty(const char *tty, struct termios *old)
+{
+	struct termios tios;
+	int ret;
+	int fd;
+
+	fd = open(tty, O_RDWR | O_NOCTTY | O_EXCL);
+	if (fd < 0)
+		err(1, "unable to open \"%s\"", tty);
+
+	ret = tcgetattr(fd, old);
+	if (ret < 0)
+		err(1, "unable to retrieve \"%s\" tios", tty);
+
+	memset(&tios, 0, sizeof(tios));
+	tios.c_cflag = B115200 | CS8 | CLOCAL | CREAD;
+	tios.c_iflag = IGNPAR;
+	tios.c_oflag = 0;
+
+	tcflush(fd, TCIFLUSH);
+
+	ret = tcsetattr(fd, TCSANOW, &tios);
+	if (ret < 0)
+		err(1, "unable to update \"%s\" tios", tty);
+
+	return fd;
+}
+
+void *alpaca_open(struct device *dev)
+{
+	struct alpaca *alpaca;
+
+	alpaca = calloc(1, sizeof(*alpaca));
+
+	alpaca->alpaca_fd = alpaca_open_tty(dev->alpaca_dev, &alpaca->alpaca_tios);
+	if (alpaca->alpaca_fd < 0)
+		err(1, "failed to open %s", dev->alpaca_dev);
+
+	alpaca->console_fd = alpaca_open_tty(dev->console_dev, &alpaca->console_tios);
+	if (alpaca->console_fd < 0)
+		err(1, "failed to open %s", dev->console_dev);
+
+	watch_add_readfd(alpaca->console_fd, alpaca_console_data, alpaca);
+
+	return alpaca;
+}
+
+static int alpaca_device_power(struct alpaca *alpaca, int on)
+{
+	char buf[32];
+	int n;
+
+	n = sprintf(buf, "devicePower %d\r", !!on);
+
+	return write(alpaca->alpaca_fd, buf, n);
+}
+
+static int alpaca_usb_device_power(struct alpaca *alpaca, int on)
+{
+	char buf[32];
+	int n;
+
+	n = sprintf(buf, "usbDevicePower %d\r", !!on);
+
+	return write(alpaca->alpaca_fd, buf, n);
+}
+
+static int alpaca_output_bit(struct alpaca *alpaca, int bit, int value)
+{
+	char buf[32];
+	int n;
+
+	n = sprintf(buf, "ttl outputBit %d %d\r", bit, !!value);
+
+	return write(alpaca->alpaca_fd, buf, n);
+}
+
+int alpaca_power_on(struct device *dev)
+{
+	alpaca_device_power(dev->cdb, 1);
+	alpaca_usb_device_power(dev->cdb, 1);
+
+	alpaca_output_bit(dev->cdb, 1, 0);
+	sleep(1);
+	alpaca_output_bit(dev->cdb, 1, 1);
+	sleep(1);
+	alpaca_output_bit(dev->cdb, 1, 0);
+
+	return 0;
+}
+
+int alpaca_power_off(struct device *dev)
+{
+	alpaca_device_power(dev->cdb, 0);
+	alpaca_usb_device_power(dev->cdb, 0);
+
+	return 0;
+}
+
+int alpaca_write(struct device *dev, const void *buf, size_t len)
+{
+	struct alpaca *alpaca = dev->cdb;
+
+	return write(alpaca->console_fd, buf, len);;
+}

alpaca.h

@@ -0,0 +1,13 @@
+#ifndef __ALPACA_H__
+#define __ALPACA_H__
+
+#include "device.h"
+
+struct alpaca;
+
+void *alpaca_open(struct device *dev);
+int alpaca_power_on(struct device *dev);
+int alpaca_power_off(struct device *dev);
+int alpaca_write(struct device *dev, const void *buf, size_t len);
+
+#endif

device.h

@@ -10,6 +10,8 @@ struct fastboot_ops;
 struct device {
 	char *board;
 	char *cdb_serial;
+	char *alpaca_dev;
+	char *console_dev;
 	char *name;
 	char *serial;
 	unsigned voltage;

device_parser.c

@@ -33,6 +33,7 @@
 #include <yaml.h>
 
 #include "device.h"
+#include "alpaca.h"
 #include "cdb_assist.h"
 #include "conmux.h"
 
@@ -107,6 +108,15 @@ static void parse_board(struct device_parser *dp)
 			dev->power_on = conmux_power_on;
 			dev->power_off = conmux_power_off;
 			dev->write = conmux_write;
+		} else if (!strcmp(key, "alpaca")) {
+			dev->alpaca_dev = strdup(value);
+
+			dev->open = alpaca_open;
+			dev->power_on = alpaca_power_on;
+			dev->power_off = alpaca_power_off;
+			dev->write = alpaca_write;
+		} else if (!strcmp(key, "console")) {
+			dev->console_dev = strdup(value);
 		} else if (!strcmp(key, "voltage")) {
 			dev->voltage = strtoul(value, NULL, 10);
 		} else if (!strcmp(key, "fastboot")) {