Files
greaseweazle-firmware/inc/cdc_acm_protocol.h
Keir Fraser 9b4b69da85 usb: Place index timings in-band within the flux read stream.
This removes the low limit on max index timings per read request.
2020-10-21 10:29:51 +01:00

174 lines
4.6 KiB
C

/*
* cdc_acm_protocol.h
*
* Greaseweazle protocol over CDC ACM streams.
*
* Written & released by Keir Fraser <keir.xen@gmail.com>
*
* This is free and unencumbered software released into the public domain.
* See the file COPYING for more details, or visit <http://unlicense.org>.
*/
/*
* GREASEWEAZLE COMMAND SET
*/
/* CMD_GET_INFO, length=3, 0. Returns 32 bytes after ACK. */
#define CMD_GET_INFO 0
/* [BOOTLOADER] CMD_UPDATE, length=6, <update_len>.
* Host follows with <update_len> bytes.
* Bootloader finally returns a status byte, 0 on success. */
/* [MAIN FIRMWARE] CMD_UPDATE, length=10, <update_len>, 0xdeafbee3.
* Host follows with <update_len> bytes.
* Main firmware finally returns a status byte, 0 on success. */
#define CMD_UPDATE 1
/* CMD_SEEK, length=3, cyl#. Seek to cyl# on selected drive. */
#define CMD_SEEK 2
/* CMD_SIDE, length=3, side# (0=bottom) */
#define CMD_SIDE 3
/* CMD_SET_PARAMS, length=3+nr, idx, <nr bytes> */
#define CMD_SET_PARAMS 4
/* CMD_GET_PARAMS, length=4, idx, nr_bytes. Returns nr_bytes after ACK. */
#define CMD_GET_PARAMS 5
/* CMD_MOTOR, length=4, drive#, on/off. Turn on/off a drive motor. */
#define CMD_MOTOR 6
/* CMD_READ_FLUX, length=2-3. Optionally include all or part of gw_read_flux.
* Returns flux readings until EOStream. */
#define CMD_READ_FLUX 7
/* CMD_WRITE_FLUX, length=2-3. Optionally include all or part of gw_write_flux.
* Host follows with flux readings until EOStream. */
#define CMD_WRITE_FLUX 8
/* CMD_GET_FLUX_STATUS, length=2. Last read/write status returned in ACK. */
#define CMD_GET_FLUX_STATUS 9
/* CMD_SWITCH_FW_MODE, length=3, <mode> */
#define CMD_SWITCH_FW_MODE 11
/* CMD_SELECT, length=3, drive#. Select drive# as current unit. */
#define CMD_SELECT 12
/* CMD_DESELECT, length=2. Deselect current unit (if any). */
#define CMD_DESELECT 13
/* CMD_SET_BUS_TYPE, length=3, bus_type. Set the bus type. */
#define CMD_SET_BUS_TYPE 14
/* CMD_SET_PIN, length=4, pin#, level. */
#define CMD_SET_PIN 15
/* CMD_RESET, length=2. Reset all state to initial (power on) values. */
#define CMD_RESET 16
/* CMD_ERASE_FLUX, length=6. Argument is gw_erase_flux. */
#define CMD_ERASE_FLUX 17
/* CMD_SOURCE_BYTES, length=6. Argument is gw_sink_source_bytes. */
#define CMD_SOURCE_BYTES 18
/* CMD_SINK_BYTES, length=6. Argument is gw_sink_source_bytes. */
#define CMD_SINK_BYTES 19
#define CMD_MAX 19
/*
* CMD_SET_BUS CODES
*/
#define BUS_NONE 0
#define BUS_IBMPC 1
#define BUS_SHUGART 2
/*
* ACK RETURN CODES
*/
#define ACK_OKAY 0
#define ACK_BAD_COMMAND 1
#define ACK_NO_INDEX 2
#define ACK_NO_TRK0 3
#define ACK_FLUX_OVERFLOW 4
#define ACK_FLUX_UNDERFLOW 5
#define ACK_WRPROT 6
#define ACK_NO_UNIT 7
#define ACK_NO_BUS 8
#define ACK_BAD_UNIT 9
#define ACK_BAD_PIN 10
/*
* CONTROL-CHANNEL COMMAND SET:
* We abuse SET_LINE_CODING requests over endpoint 0, stashing a command
* in the baud-rate field.
*/
#define BAUD_NORMAL 9600
#define BAUD_CLEAR_COMMS 10000
/*
* Flux stream opcodes. Preceded by 0xFF byte.
*/
#define FLUXOP_LONGFLUX 1
#define FLUXOP_INDEX 2
/*
* COMMAND PACKETS
*/
/* CMD_GET_INFO, index 0 */
#define GETINFO_FIRMWARE 0
struct packed gw_info {
uint8_t fw_major;
uint8_t fw_minor;
uint8_t is_main_firmware; /* == 0 -> update bootloader */
uint8_t max_cmd;
uint32_t sample_freq;
uint8_t hw_model, hw_submodel;
uint8_t usb_speed;
};
extern struct gw_info gw_info;
/* CMD_GET_INFO, index 1 */
#define GETINFO_BW_STATS 1
struct packed gw_bw_stats {
struct packed {
uint32_t bytes;
uint32_t usecs;
} min_bw, max_bw;
};
/* CMD_READ_FLUX */
struct packed gw_read_flux {
uint16_t nr_idx; /* default: 2 */
};
/* CMD_WRITE_FLUX */
struct packed gw_write_flux {
uint8_t terminate_at_index; /* default: 0 */
};
/* CMD_ERASE_FLUX */
struct packed gw_erase_flux {
uint32_t erase_ticks;
};
/* CMD_SINK_SOURCE_BYTES */
struct packed gw_sink_source_bytes {
uint32_t nr_bytes;
};
/* CMD_{GET,SET}_PARAMS, index 0 */
#define PARAMS_DELAYS 0
struct packed gw_delay {
uint16_t select_delay; /* usec */
uint16_t step_delay; /* usec */
uint16_t seek_settle; /* msec */
uint16_t motor_delay; /* msec */
uint16_t auto_off; /* msec */
};
/* CMD_SWITCH_FW_MODE */
#define FW_MODE_BOOTLOADER 0
#define FW_MODE_NORMAL 1
/*
* Local variables:
* mode: C
* c-file-style: "Linux"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/