1 // SPDX-License-Identifier: GPL-2.0+
3  * Support for emulating SAT (ata pass through) on devices based
20 #define DRV_NAME "ums-cypress"
67  * ATACB is a protocol used on cypress usb<->ata bridge to
77 	if (likely(srb->cmnd[0] != ATA_16 && srb->cmnd[0] != ATA_12)) {  in cypress_atacb_passthrough()
82 	memcpy(save_cmnd, srb->cmnd, sizeof(save_cmnd));  in cypress_atacb_passthrough()
83 	memset(srb->cmnd, 0, MAX_COMMAND_SIZE);  in cypress_atacb_passthrough()
99 	srb->cmd_len = 16;  in cypress_atacb_passthrough()
101 	srb->cmnd[0] = 0x24; /*  in cypress_atacb_passthrough()
102 			      * bVSCBSignature : vendor-specific command  in cypress_atacb_passthrough()
106 	srb->cmnd[1] = 0x24; /* bVSCBSubCommand : 0x24 for ATACB */  in cypress_atacb_passthrough()
108 	srb->cmnd[3] = 0xff - 1; /*  in cypress_atacb_passthrough()
109 				  * features, sector count, lba low, lba med  in cypress_atacb_passthrough()
112 	srb->cmnd[4] = 1; /* TransferBlockCount : 512 */  in cypress_atacb_passthrough()
115 		srb->cmnd[ 6] = save_cmnd[ 4]; /* features */  in cypress_atacb_passthrough()
116 		srb->cmnd[ 7] = save_cmnd[ 6]; /* sector count */  in cypress_atacb_passthrough()
117 		srb->cmnd[ 8] = save_cmnd[ 8]; /* lba low */  in cypress_atacb_passthrough()
118 		srb->cmnd[ 9] = save_cmnd[10]; /* lba med */  in cypress_atacb_passthrough()
119 		srb->cmnd[10] = save_cmnd[12]; /* lba high */  in cypress_atacb_passthrough()
120 		srb->cmnd[11] = save_cmnd[13]; /* device */  in cypress_atacb_passthrough()
121 		srb->cmnd[12] = save_cmnd[14]; /* command */  in cypress_atacb_passthrough()
130 		srb->cmnd[ 6] = save_cmnd[3]; /* features */  in cypress_atacb_passthrough()
131 		srb->cmnd[ 7] = save_cmnd[4]; /* sector count */  in cypress_atacb_passthrough()
132 		srb->cmnd[ 8] = save_cmnd[5]; /* lba low */  in cypress_atacb_passthrough()
133 		srb->cmnd[ 9] = save_cmnd[6]; /* lba med */  in cypress_atacb_passthrough()
134 		srb->cmnd[10] = save_cmnd[7]; /* lba high */  in cypress_atacb_passthrough()
135 		srb->cmnd[11] = save_cmnd[8]; /* device */  in cypress_atacb_passthrough()
136 		srb->cmnd[12] = save_cmnd[9]; /* command */  in cypress_atacb_passthrough()
139 	/* Filter SET_FEATURES - XFER MODE command */  in cypress_atacb_passthrough()
140 	if ((srb->cmnd[12] == ATA_CMD_SET_FEATURES)  in cypress_atacb_passthrough()
141 			&& (srb->cmnd[6] == SETFEATURES_XFER))  in cypress_atacb_passthrough()
144 	if (srb->cmnd[12] == ATA_CMD_ID_ATA || srb->cmnd[12] == ATA_CMD_ID_ATAPI)  in cypress_atacb_passthrough()
145 		srb->cmnd[2] |= (1<<7); /* set  IdentifyPacketDevice for these cmds */  in cypress_atacb_passthrough()
151 	if (srb->result == SAM_STAT_CHECK_CONDITION &&  in cypress_atacb_passthrough()
152 			memcmp(srb->sense_buffer, usb_stor_sense_invalidCDB,  in cypress_atacb_passthrough()
162 	if ((srb->result != (DID_ERROR << 16) &&  in cypress_atacb_passthrough()
163 				srb->result != (DID_ABORT << 16)) &&  in cypress_atacb_passthrough()
167 		unsigned char *sb = srb->sense_buffer;  in cypress_atacb_passthrough()
177 		 * but reading register selected in srb->cmnd[4]  in cypress_atacb_passthrough()
179 		srb->cmd_len = 16;  in cypress_atacb_passthrough()
180 		srb->cmnd[2] = 1;  in cypress_atacb_passthrough()
183 		memcpy(regs, srb->sense_buffer, sizeof(regs));  in cypress_atacb_passthrough()
184 		tmp_result = srb->result;  in cypress_atacb_passthrough()
195 		sb[2] = 0; /* ATA PASS THROUGH INFORMATION AVAILABLE */  in cypress_atacb_passthrough()
217 		desc[ 7] = regs[3];  /* lba low */  in cypress_atacb_passthrough()
223 		srb->result = SAM_STAT_CHECK_CONDITION;  in cypress_atacb_passthrough()
227 	srb->result = SAM_STAT_CHECK_CONDITION;  in cypress_atacb_passthrough()
229 	memcpy(srb->sense_buffer,  in cypress_atacb_passthrough()
233 	memcpy(srb->cmnd, save_cmnd, sizeof(save_cmnd));  in cypress_atacb_passthrough()
234 	if (srb->cmnd[0] == ATA_12)  in cypress_atacb_passthrough()
235 		srb->cmd_len = 12;  in cypress_atacb_passthrough()
248 			(id - cypress_usb_ids) + cypress_unusual_dev_list,  in cypress_probe()
258 	if (device->descriptor.iManufacturer != 0x38 ||  in cypress_probe()
259 	    device->descriptor.iProduct != 0x4e ||  in cypress_probe()
260 	    device->descriptor.iSerialNumber != 0x64) {  in cypress_probe()
261 		us->protocol_name = "Transparent SCSI with Cypress ATACB";  in cypress_probe()
262 		us->proto_handler = cypress_atacb_passthrough;  in cypress_probe()
264 		us->protocol_name = "Transparent SCSI";  in cypress_probe()
265 		us->proto_handler = usb_stor_transparent_scsi_command;  in cypress_probe()