CGS_REG_FIELD_MASK
(((orig_val) & ~CGS_REG_FIELD_MASK(reg, field)) | \
(CGS_REG_FIELD_MASK(reg, field) & ((field_val) << CGS_REG_FIELD_SHIFT(reg, field))))
(((value) & CGS_REG_FIELD_MASK(reg, field)) >> CGS_REG_FIELD_SHIFT(reg, field))
cgs_write_register(device, mm##reg, (cgs_read_register(device, mm##reg) & ~CGS_REG_FIELD_MASK(reg, field)) | (val) << CGS_REG_FIELD_SHIFT(reg, field))
cgs_write_ind_register(device, space, ix##reg, (cgs_read_ind_register(device, space, ix##reg) & ~CGS_REG_FIELD_MASK(reg, field)) | (val) << CGS_REG_FIELD_SHIFT(reg, field))