diff options
Diffstat (limited to 'tools/csr_bcsp.c')
| -rw-r--r-- | tools/csr_bcsp.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/tools/csr_bcsp.c b/tools/csr_bcsp.c new file mode 100644 index 0000000..df247a2 --- /dev/null +++ b/tools/csr_bcsp.c @@ -0,0 +1,255 @@ +/* + * + * 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 <fcntl.h> +#include <unistd.h> +#include <string.h> +#include <stdint.h> +#include <termios.h> + +#include "csr.h" +#include "ubcsp.h" + +static uint16_t seqnum = 0x0000; + +static int fd = -1; + +static struct ubcsp_packet send_packet; +static uint8_t send_buffer[512]; + +static struct ubcsp_packet receive_packet; +static uint8_t receive_buffer[512]; + +int csr_open_bcsp(char *device, speed_t bcsp_rate) +{ + struct termios ti; + uint8_t delay, activity = 0x00; + int timeout = 0; + + if (!device) + device = "/dev/ttyS0"; + + fd = open(device, O_RDWR | O_NOCTTY); + if (fd < 0) { + fprintf(stderr, "Can't open serial port: %s (%d)\n", + strerror(errno), errno); + return -1; + } + + tcflush(fd, TCIOFLUSH); + + if (tcgetattr(fd, &ti) < 0) { + fprintf(stderr, "Can't get port settings: %s (%d)\n", + strerror(errno), errno); + close(fd); + return -1; + } + + cfmakeraw(&ti); + + ti.c_cflag |= CLOCAL; + ti.c_cflag &= ~CRTSCTS; + ti.c_cflag |= PARENB; + ti.c_cflag &= ~PARODD; + ti.c_cflag &= ~CSIZE; + ti.c_cflag |= CS8; + ti.c_cflag &= ~CSTOPB; + + ti.c_cc[VMIN] = 1; + ti.c_cc[VTIME] = 0; + + cfsetospeed(&ti, bcsp_rate); + + if (tcsetattr(fd, TCSANOW, &ti) < 0) { + fprintf(stderr, "Can't change port settings: %s (%d)\n", + strerror(errno), errno); + close(fd); + return -1; + } + + tcflush(fd, TCIOFLUSH); + + if (fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK) < 0) { + fprintf(stderr, "Can't set non blocking mode: %s (%d)\n", + strerror(errno), errno); + close(fd); + return -1; + } + + memset(&send_packet, 0, sizeof(send_packet)); + memset(&receive_packet, 0, sizeof(receive_packet)); + + ubcsp_initialize(); + + send_packet.length = 512; + send_packet.payload = send_buffer; + + receive_packet.length = 512; + receive_packet.payload = receive_buffer; + + ubcsp_receive_packet(&receive_packet); + + while (1) { + delay = ubcsp_poll(&activity); + + if (activity & UBCSP_PACKET_RECEIVED) + break; + + if (delay) { + usleep(delay * 100); + + if (timeout++ > 5000) { + fprintf(stderr, "Initialization timed out\n"); + return -1; + } + } + } + + return 0; +} + +void put_uart(uint8_t ch) +{ + if (write(fd, &ch, 1) < 0) + fprintf(stderr, "UART write error\n"); +} + +uint8_t get_uart(uint8_t *ch) +{ + int res = read(fd, ch, 1); + return res > 0 ? res : 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; + uint8_t delay, activity = 0x00; + int timeout = 0, sent = 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); + + receive_packet.length = 512; + ubcsp_receive_packet(&receive_packet); + + send_packet.channel = 5; + send_packet.reliable = 1; + send_packet.length = (size * 2) + 4; + memcpy(send_packet.payload, cp, (size * 2) + 4); + + ubcsp_send_packet(&send_packet); + + while (1) { + delay = ubcsp_poll(&activity); + + if (activity & UBCSP_PACKET_SENT) { + switch (varid) { + case CSR_VARID_COLD_RESET: + case CSR_VARID_WARM_RESET: + case CSR_VARID_COLD_HALT: + case CSR_VARID_WARM_HALT: + return 0; + } + + sent = 1; + timeout = 0; + } + + if (activity & UBCSP_PACKET_RECEIVED) { + if (sent && receive_packet.channel == 5 && + receive_packet.payload[0] == 0xff) { + memcpy(rp, receive_packet.payload, + receive_packet.length); + break; + } + + receive_packet.length = 512; + ubcsp_receive_packet(&receive_packet); + timeout = 0; + } + + if (delay) { + usleep(delay * 100); + + if (timeout++ > 5000) { + fprintf(stderr, "Operation timed out\n"); + return -1; + } + } + } + + 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_bcsp(uint16_t varid, uint8_t *value, uint16_t length) +{ + return do_command(0x0000, seqnum++, varid, value, length); +} + +int csr_write_bcsp(uint16_t varid, uint8_t *value, uint16_t length) +{ + return do_command(0x0002, seqnum++, varid, value, length); +} + +void csr_close_bcsp(void) +{ + close(fd); +} |