+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+#include <usb.h>
+
+#define CP2101_UART 0x00
+#define UART_ENABLE 0x0001
+#define UART_DISABLE 0x0000
+#define REQTYPE_HOST_TO_DEVICE 0x41
+#define REQTYPE_DEVICE_TO_HOST 0xc1
+
+static int
+cp_usb_gpio_get(struct ccdbg *dbg, uint8_t *gpio_get)
+{
+ return usb_control_msg(dbg->usb_dev, /* dev */
+ 0xc0, /* request */
+ 0xff, /* requesttype */
+ 0x00c2, /* value */
+ 0, /* index */
+ (char *) gpio_get, /* bytes */
+ 1, /* size */
+ 300); /* timeout */
+}
+
+static int
+cp_usb_gpio_set(struct ccdbg *dbg, uint8_t mask, uint8_t value)
+{
+ uint16_t gpio_set = ((uint16_t) value << 8) | mask;
+
+ return usb_control_msg(dbg->usb_dev, /* dev */
+ 0x40, /* request */
+ 0xff, /* requesttype */
+ 0x37e1, /* value */
+ gpio_set, /* index */
+ NULL, /* bytes */
+ 0, /* size */
+ 300); /* timeout */
+}
+
+static int
+cp_usb_uart_enable_disable(struct ccdbg *dbg, uint16_t enable)
+{
+ return usb_control_msg(dbg->usb_dev,
+ CP2101_UART,
+ REQTYPE_HOST_TO_DEVICE,
+ enable,
+ 0,
+ NULL,
+ 0,
+ 300);
+}
+
+void
+cp_usb_init(struct ccdbg *dbg)
+{
+ usb_dev_handle *dev_handle;
+ struct usb_device *dev;
+ struct usb_bus *bus, *busses;
+ int interface;
+ int ret;
+ uint8_t gpio;
+
+ usb_init();
+ usb_find_busses();
+ usb_find_devices();
+
+ busses = usb_get_busses();
+ for (bus = busses; bus; bus = bus->next) {
+ for (dev = bus->devices; dev; dev = dev->next) {
+ if (dev->descriptor.idVendor == 0x10c4 &&
+ dev->descriptor.idProduct == 0xea60)
+ break;
+ }
+ if (dev)
+ break;
+ }
+ if (!dev){
+ perror("No CP2103 found\n");
+ exit(1);
+ }
+ interface = 0;
+ dev_handle = usb_open(dev);
+ usb_detach_kernel_driver_np(dev_handle, interface);
+ usb_claim_interface(dev_handle, interface);
+ dbg->usb_dev = dev_handle;
+ ret = cp_usb_uart_enable_disable(dbg, UART_DISABLE);
+ dbg->gpio = 0xf;
+ ret = cp_usb_gpio_set(dbg, 0xf, dbg->gpio);
+ ret = cp_usb_gpio_get(dbg, &gpio);
+}
+
+void
+cp_usb_fini(struct ccdbg *dbg)
+{
+ cp_usb_uart_enable_disable(dbg, UART_DISABLE);
+ usb_close(dbg->usb_dev);
+}
+
+void
+cp_usb_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
+{
+ uint8_t new_gpio;
+ int ret;
+
+ new_gpio = (dbg->gpio & ~mask) | (value & mask);
+ if (new_gpio != dbg->gpio) {
+ ret = cp_usb_gpio_set(dbg, new_gpio ^ dbg->gpio, new_gpio);
+ if (ret < 0)
+ perror("gpio_set");
+ dbg->gpio = new_gpio;
+ }
+}
+
+uint8_t
+cp_usb_read(struct ccdbg *dbg)
+{
+ int ret;
+ uint8_t gpio;
+
+ ret = cp_usb_gpio_get(dbg, &gpio);
+ if (ret < 0)
+ perror("gpio_set");
+ return gpio;
+}
projects / fw / altos / commitdiff