diff options
Diffstat (limited to 'tools/csr_usb.c')
| -rw-r--r-- | tools/csr_usb.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/tools/csr_usb.c b/tools/csr_usb.c new file mode 100644 index 0000000..19903b0 --- /dev/null +++ b/tools/csr_usb.c @@ -0,0 +1,180 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> + * + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <errno.h> +#include <string.h> + +#include <usb.h> + +#include "csr.h" + +#ifdef NEED_USB_GET_BUSSES +static inline struct usb_bus *usb_get_busses(void) +{ + return usb_busses; +} +#endif + +#ifdef NEED_USB_INTERRUPT_READ +static inline int usb_interrupt_read(usb_dev_handle *dev, int ep, char *bytes, int size, int timeout) +{ + return usb_bulk_read(dev, ep, bytes, size, timeout); +} +#endif + +#ifndef USB_DIR_OUT +#define USB_DIR_OUT 0x00 +#endif + +static uint16_t seqnum = 0x0000; + +static struct usb_dev_handle *udev = NULL; + +int csr_open_usb(char *device) +{ + struct usb_bus *bus; + struct usb_device *dev; + + usb_init(); + + usb_find_busses(); + usb_find_devices(); + + for (bus = usb_get_busses(); bus; bus = bus->next) { + for (dev = bus->devices; dev; dev = dev->next) { + if (dev->descriptor.bDeviceClass == USB_CLASS_HUB) + continue; + + if (dev->descriptor.idVendor != 0x0a12 || + dev->descriptor.idProduct != 0x0001) + continue; + + goto found; + } + } + + fprintf(stderr, "Device not available\n"); + + return -1; + +found: + udev = usb_open(dev); + if (!udev) { + fprintf(stderr, "Can't open device: %s (%d)\n", + strerror(errno), errno); + return -1; + } + + if (usb_claim_interface(udev, 0) < 0) { + fprintf(stderr, "Can't claim interface: %s (%d)\n", + strerror(errno), errno); + usb_close(udev); + return -1; + } + + return 0; +} + +static int do_command(uint16_t command, uint16_t seqnum, uint16_t varid, uint8_t *value, uint16_t length) +{ + unsigned char cp[254], rp[254]; + uint8_t cmd[10]; + uint16_t size; + int len, offset = 0; + + size = (length < 8) ? 9 : ((length + 1) / 2) + 5; + + cmd[0] = command & 0xff; + cmd[1] = command >> 8; + cmd[2] = size & 0xff; + cmd[3] = size >> 8; + cmd[4] = seqnum & 0xff; + cmd[5] = seqnum >> 8; + cmd[6] = varid & 0xff; + cmd[7] = varid >> 8; + cmd[8] = 0x00; + cmd[9] = 0x00; + + memset(cp, 0, sizeof(cp)); + cp[0] = 0x00; + cp[1] = 0xfc; + cp[2] = (size * 2) + 1; + cp[3] = 0xc2; + memcpy(cp + 4, cmd, sizeof(cmd)); + memcpy(cp + 14, value, length); + + usb_interrupt_read(udev, 0x81, (void *) rp, sizeof(rp), 2); + + if (usb_control_msg(udev, USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_DEVICE, + 0, 0, 0, (void *) cp, (size * 2) + 4, 1000) < 0) + return -1; + + switch (varid) { + case CSR_VARID_COLD_RESET: + case CSR_VARID_WARM_RESET: + case CSR_VARID_COLD_HALT: + case CSR_VARID_WARM_HALT: + return 0; + } + + do { + len = usb_interrupt_read(udev, 0x81, + (void *) (rp + offset), sizeof(rp) - offset, 10); + offset += len; + } while (len > 0); + + if (rp[0] != 0xff || rp[2] != 0xc2) { + errno = EIO; + return -1; + } + + if ((rp[11] + (rp[12] << 8)) != 0) { + errno = ENXIO; + return -1; + } + + memcpy(value, rp + 13, length); + + return 0; +} + +int csr_read_usb(uint16_t varid, uint8_t *value, uint16_t length) +{ + return do_command(0x0000, seqnum++, varid, value, length); +} + +int csr_write_usb(uint16_t varid, uint8_t *value, uint16_t length) +{ + return do_command(0x0002, seqnum++, varid, value, length); +} + +void csr_close_usb(void) +{ + usb_release_interface(udev, 0); + usb_close(udev); +} |