Rewrite mt1959.rs: complete platform driver with full profile support
Complete rewrite of MT1959 platform driver:
- All 10 handlers implemented matching firmware logic 1:1
- load_firmware(): WRITE_BUFFER ld_microcode on cold boot
- calibrate(): full zone probe + speed table + triple SET_CD_SPEED
- init(): x86 dispatch sequence (unlock → fw × 6, calibrate × 6)
- read_register_a/b(): use pre-built CDBs from profile
- set_read_speed(): speed table lookup per zone
- status(), probe(), keepalive(), timing()
Platform trait updated:
- Renamed read_config → load_firmware (matches actual function)
- Added init() for full x86 dispatch sequence
- Renamed read_sectors → set_read_speed (operation sets speed, not reads)
- Split read_register into read_register_a/b (separate CDBs)
Profile fields used:
- drive_signature, unlock_init_value, unlock_response_size_minus_init
- ld_microcode (1888B firmware payload)
- hardware_register_a_cdb, hardware_register_b_cdb (pre-built CDBs)
- drive_nominal_speed_cdb (calibration triple-play)
- speed_zone_table, speed_calc_table (operation lookups)
MattJackson
617af3db92