diff options
| -rw-r--r-- | tools/csr_bcsp.c | 161 |
1 files changed, 159 insertions, 2 deletions
diff --git a/tools/csr_bcsp.c b/tools/csr_bcsp.c index 582d6859..f39a4182 100644 --- a/tools/csr_bcsp.c +++ b/tools/csr_bcsp.c @@ -39,9 +39,40 @@ static uint16_t seqnum = 0x0000; static int fd = -1; +#ifdef HAVE_UBCSP +#include "ubcsp.h" +#else +#define UBCSP_PACKET_SENT 0x01 +#define UBCSP_PACKET_RECEIVED 0x02 +#define UBCSP_PEER_RESET 0x04 +#define UBCSP_PACKET_ACK 0x08 + +struct ubcsp_packet +{ + uint8_t channel; + uint8_t reliable; + uint8_t use_crc; + uint16_t length; + uint8_t *payload; +}; + +static inline void ubcsp_initialize(void) {} +static inline void ubcsp_send_packet(struct ubcsp_packet *send_packet) {} +static inline void ubcsp_receive_packet(struct ubcsp_packet *receive_packet) {} +static inline uint8_t ubcsp_poll(uint8_t *activity) { return 20; } +#endif + +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) { struct termios ti; + uint8_t delay, activity = 0x00; + int timeout = 0; if (!device) device = "/dev/ttyS0"; @@ -93,14 +124,140 @@ int csr_open_bcsp(char *device) 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++ > 100) { + fprintf(stderr, "Initialization timed out\n"); + return -1; + } + } + } + return 0; } +void put_uart(uint8_t ch) +{ + write(fd, &ch, 1); +} + +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) { - errno = EIO; + unsigned char cp[254], rp[254]; + uint8_t cmd[10]; + uint16_t size; + uint8_t delay, activity = 0x00; + int timeout = 0, sent = 0; - return -1; + 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_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 (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 (delay) { + usleep(delay * 100); + + if (timeout++ > 100) { + 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) |