/* Driver for SCM Microsystems USB-ATAPI cable * * $Id: shuttle_usbat.c,v 1.16 2002/02/25 00:40:13 mdharm Exp $ * * Current development and maintenance by: * (c) 2000, 2001 Robert Baruch (autophile@starband.net) * * Developed with the assistance of: * (c) 2002 Alan Stern * * Many originally ATAPI devices were slightly modified to meet the USB * market by using some kind of translation from ATAPI to USB on the host, * and the peripheral would translate from USB back to ATAPI. * * SCM Microsystems (www.scmmicro.com) makes a device, sold to OEM's only, * which does the USB-to-ATAPI conversion. By obtaining the data sheet on * their device under nondisclosure agreement, I have been able to write * this driver for Linux. * * The chip used in the device can also be used for EPP and ISA translation * as well. This driver is only guaranteed to work with the ATAPI * translation. * * The only peripheral that I know of (as of 27 Mar 2001) that uses this * device is the Hewlett-Packard 8200e/8210e/8230e CD-Writer Plus. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "transport.h" #include "protocol.h" #include "usb.h" #include "debug.h" #include "shuttle_usbat.h" #include #include #include extern int usb_stor_control_msg(struct us_data *us, unsigned int pipe, u8 request, u8 requesttype, u16 value, u16 index, void *data, u16 size); extern int usb_stor_bulk_msg(struct us_data *us, void *data, int pipe, unsigned int len, unsigned int *act_len); #define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) ) #define LSB_of(s) ((s)&0xFF) #define MSB_of(s) ((s)>>8) int transferred = 0; /* * Send a control message and wait for the response. * * us - the pointer to the us_data structure for the device to use * * request - the URB Setup Packet's first 6 bytes. The first byte always * corresponds to the request type, and the second byte always corresponds * to the request. The other 4 bytes do not correspond to value and index, * since they are used in a custom way by the SCM protocol. * * xfer_data - a buffer from which to get, or to which to store, any data * that gets send or received, respectively, with the URB. Even though * it looks like we allocate a buffer in this code for the data, xfer_data * must contain enough allocated space. * * xfer_len - the number of bytes to send or receive with the URB. * */ static int usbat_send_control(struct us_data *us, int pipe, unsigned char request, unsigned char requesttype, unsigned short value, unsigned short index, unsigned char *xfer_data, unsigned int xfer_len) { int result; // Send the URB to the device and wait for a response. /* Why are request and request type reversed in this call? */ result = usb_stor_control_msg(us, pipe, request, requesttype, value, index, xfer_data, xfer_len); // Check the return code for the command. if (result < 0) { /* if the command was aborted, indicate that */ if (result == -ECONNRESET) return USB_STOR_TRANSPORT_ABORTED; /* a stall is a fatal condition from the device */ if (result == -EPIPE) { US_DEBUGP("-- Stall on control pipe. Clearing\n"); result = usb_stor_clear_halt(us, pipe); US_DEBUGP("-- usb_stor_clear_halt() returns %d\n", result); return USB_STOR_TRANSPORT_FAILED; } /* Uh oh... serious problem here */ return USB_STOR_TRANSPORT_ERROR; } return USB_STOR_TRANSPORT_GOOD; } static int usbat_raw_bulk(struct us_data *us, int direction, unsigned char *data, unsigned short len) { int result; int act_len; int pipe; if (direction == SCSI_DATA_READ) pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in); else pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out); result = usb_stor_bulk_msg(us, data, pipe, len, &act_len); /* if we stall, we need to clear it before we go on */ if (result == -EPIPE) { US_DEBUGP("EPIPE: clearing endpoint halt for" " pipe 0x%x, stalled at %d bytes\n", pipe, act_len); usb_stor_clear_halt(us, pipe); } if (result) { /* NAK - that means we've retried a few times already */ if (result == -ETIMEDOUT) { US_DEBUGP("usbat_raw_bulk():" " device NAKed\n"); return US_BULK_TRANSFER_FAILED; } /* -ECONNRESET -- we canceled this transfer */ if (result == -ECONNRESET) { US_DEBUGP("usbat_raw_bulk():" " transfer aborted\n"); return US_BULK_TRANSFER_ABORTED; } if (result == -EPIPE) { US_DEBUGP("usbat_raw_bulk():" " output pipe stalled\n"); return US_BULK_TRANSFER_SHORT; } /* the catch-all case */ US_DEBUGP("us_transfer_partial(): unknown error\n"); return US_BULK_TRANSFER_FAILED; } if (act_len != len) { US_DEBUGP("Warning: Transferred only %d bytes\n", act_len); return US_BULK_TRANSFER_SHORT; } US_DEBUGP("Transferred %s %d of %d bytes\n", direction==SCSI_DATA_READ ? "in" : "out", act_len, len); return US_BULK_TRANSFER_GOOD; } /* * Note: direction must be set if command_len == 0. */ static int usbat_bulk_transport(struct us_data *us, unsigned char *command, unsigned short command_len, int direction, unsigned char *data, unsigned short len, int use_sg) { int result = USB_STOR_TRANSPORT_GOOD; int transferred = 0; int i; struct scatterlist *sg; if (len==0) return USB_STOR_TRANSPORT_GOOD; /* transfer the data payload for the command, if there is any */ if (command_len != 0) direction = (command[0]&0x80) ? SCSI_DATA_READ : SCSI_DATA_WRITE; if (!use_sg) result = usbat_raw_bulk(us, direction, data, len); else { sg = (struct scatterlist *)data; for (i=0; i sg[i].length ? sg[i].length : len-transferred); if (result!=US_BULK_TRANSFER_GOOD) break; transferred += sg[i].length; } } return result; } int usbat_read(struct us_data *us, unsigned char access, unsigned char reg, unsigned char *content) { int result; result = usbat_send_control(us, usb_rcvctrlpipe(us->pusb_dev,0), access, 0xC0, (u16)reg, 0, content, 1); return result; } int usbat_write(struct us_data *us, unsigned char access, unsigned char reg, unsigned char content) { int result; result = usbat_send_control(us, usb_sndctrlpipe(us->pusb_dev,0), access|0x01, 0x40, short_pack(reg, content), 0, NULL, 0); return result; } int usbat_set_shuttle_features(struct us_data *us, unsigned char external_trigger, unsigned char epp_control, unsigned char mask_byte, unsigned char test_pattern, unsigned char subcountH, unsigned char subcountL) { int result; unsigned char command[8] = { 0x40, 0x81, epp_control, external_trigger, test_pattern, mask_byte, subcountL, subcountH }; result = usbat_send_control(us, usb_sndctrlpipe(us->pusb_dev,0), 0x80, 0x40, 0, 0, command, 8); return result; } int usbat_read_block(struct us_data *us, unsigned char access, unsigned char reg, unsigned char *content, unsigned short len, int use_sg) { int result; unsigned char command[8] = { 0xC0, access|0x02, reg, 0x00, 0x00, 0x00, LSB_of(len), MSB_of(len) }; result = usbat_send_control(us, usb_sndctrlpipe(us->pusb_dev,0), 0x80, 0x40, 0, 0, command, 8); if (result != USB_STOR_TRANSPORT_GOOD) return result; result = usbat_bulk_transport(us, NULL, 0, SCSI_DATA_READ, content, len, use_sg); return result; } /* * Block, waiting for an ATA device to become not busy or to report * an error condition. */ int usbat_wait_not_busy(struct us_data *us, int minutes) { int i; int result; unsigned char status; /* Synchronizing cache on a CDR could take a heck of a long time, * but probably not more than 10 minutes or so. On the other hand, * doing a full blank on a CDRW at speed 1 will take about 75 * minutes! */ for (i=0; i<1200+minutes*60; i++) { result = usbat_read(us, USBAT_ATA, 0x17, &status); if (result!=USB_STOR_TRANSPORT_GOOD) return result; if (status&0x01) { // check condition result = usbat_read(us, USBAT_ATA, 0x10, &status); return USB_STOR_TRANSPORT_FAILED; } if (status&0x20) // device fault return USB_STOR_TRANSPORT_FAILED; if ((status&0x80)==0x00) { // not busy US_DEBUGP("Waited not busy for %d steps\n", i); return USB_STOR_TRANSPORT_GOOD; } if (i<500) wait_ms(10); // 5 seconds else if (i<700) wait_ms(50); // 10 seconds else if (i<1200) wait_ms(100); // 50 seconds else wait_ms(1000); // X minutes } US_DEBUGP("Waited not busy for %d minutes, timing out.\n", minutes); return USB_STOR_TRANSPORT_FAILED; } int usbat_write_block(struct us_data *us, unsigned char access, unsigned char reg, unsigned char *content, unsigned short len, int use_sg, int minutes) { int result; unsigned char command[8] = { 0x40, access|0x03, reg, 0x00, 0x00, 0x00, LSB_of(len), MSB_of(len) }; result = usbat_send_control(us, usb_sndctrlpipe(us->pusb_dev,0), 0x80, 0x40, 0, 0, command, 8); if (result != USB_STOR_TRANSPORT_GOOD) return result; result = usbat_bulk_transport(us, NULL, 0, SCSI_DATA_WRITE, content, len, use_sg); if (result != USB_STOR_TRANSPORT_GOOD) return result; return usbat_wait_not_busy(us, minutes); } int usbat_rw_block_test(struct us_data *us, unsigned char access, unsigned char *registers, unsigned char *data_out, unsigned short num_registers, unsigned char data_reg, unsigned char status_reg, unsigned char timeout, unsigned char qualifier, int direction, unsigned char *content, unsigned short len, int use_sg, int minutes) { int result; // Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here, // but that's what came out of the trace every single time. unsigned char command[16] = { 0x40, access|0x07, 0x07, 0x17, 0xfc, 0xe7, LSB_of(num_registers*2), MSB_of(num_registers*2), (direction==SCSI_DATA_WRITE ? 0x40 : 0xC0), access|(direction==SCSI_DATA_WRITE ? 0x05 : 0x04), data_reg, status_reg, timeout, qualifier, LSB_of(len), MSB_of(len) }; int i; unsigned char data[num_registers*2]; unsigned char status; for (i=0; ipusb_dev,0), 0x80, 0x40, 0, 0, (i==0 ? command : command+8), (i==0 ? 16 : 8)); if (result != USB_STOR_TRANSPORT_GOOD) return result; if (i==0) { result = usbat_bulk_transport(us, NULL, 0, SCSI_DATA_WRITE, data, num_registers*2, 0); if (result!=USB_STOR_TRANSPORT_GOOD) return result; } //US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n", // direction == SCSI_DATA_WRITE ? "out" : "in", // len, use_sg); result = usbat_bulk_transport(us, NULL, 0, direction, content, len, use_sg); /* * If we get a stall on the bulk download, we'll retry * the bulk download -- but not the SCSI command because * in some sense the SCSI command is still 'active' and * waiting for the data. Don't ask me why this should be; * I'm only following what the Windoze driver did. * * Note that a stall for the test-and-read/write command means * that the test failed. In this case we're testing to make * sure that the device is error-free * (i.e. bit 0 -- CHK -- of status is 0). The most likely * hypothesis is that the USBAT chip somehow knows what * the device will accept, but doesn't give the device any * data until all data is received. Thus, the device would * still be waiting for the first byte of data if a stall * occurs, even if the stall implies that some data was * transferred. */ if (result == US_BULK_TRANSFER_SHORT) { /* * If we're reading and we stalled, then clear * the bulk output pipe only the first time. */ if (direction==SCSI_DATA_READ && i==0) usb_stor_clear_halt(us, usb_sndbulkpipe(us->pusb_dev, us->ep_out)); /* * Read status: is the device angry, or just busy? */ result = usbat_read(us, USBAT_ATA, direction==SCSI_DATA_WRITE ? 0x17 : 0x0E, &status); if (result!=USB_STOR_TRANSPORT_GOOD) return result; if (status&0x01) // check condition return USB_STOR_TRANSPORT_FAILED; if (status&0x20) // device fault return USB_STOR_TRANSPORT_FAILED; US_DEBUGP("Redoing %s\n", direction==SCSI_DATA_WRITE ? "write" : "read"); } else if (result != US_BULK_TRANSFER_GOOD) return result; else return usbat_wait_not_busy(us, minutes); } US_DEBUGP("Bummer! %s bulk data 20 times failed.\n", direction==SCSI_DATA_WRITE ? "Writing" : "Reading"); return USB_STOR_TRANSPORT_FAILED; } /* * Write data to multiple registers at once. Not meant for large * transfers of data! */ int usbat_multiple_write(struct us_data *us, unsigned char access, unsigned char *registers, unsigned char *data_out, unsigned short num_registers) { int result; unsigned char data[num_registers*2]; int i; unsigned char command[8] = { 0x40, access|0x07, 0x00, 0x00, 0x00, 0x00, LSB_of(num_registers*2), MSB_of(num_registers*2) }; for (i=0; ipusb_dev,0), 0x80, 0x40, 0, 0, command, 8); if (result != USB_STOR_TRANSPORT_GOOD) return result; result = usbat_bulk_transport(us, NULL, 0, SCSI_DATA_WRITE, data, num_registers*2, 0); if (result!=USB_STOR_TRANSPORT_GOOD) return result; return usbat_wait_not_busy(us, 0); } int usbat_read_user_io(struct us_data *us, unsigned char *data_flags) { int result; result = usbat_send_control(us, usb_rcvctrlpipe(us->pusb_dev,0), 0x82, 0xC0, 0, 0, data_flags, 1); return result; } int usbat_write_user_io(struct us_data *us, unsigned char enable_flags, unsigned char data_flags) { int result; result = usbat_send_control(us, usb_sndctrlpipe(us->pusb_dev,0), 0x82, 0x40, short_pack(enable_flags, data_flags), 0, NULL, 0); return result; } /* * Squeeze a potentially huge (> 65535 byte) read10 command into * a little ( <= 65535 byte) ATAPI pipe */ int usbat_handle_read10(struct us_data *us, unsigned char *registers, unsigned char *data, Scsi_Cmnd *srb) { int result = USB_STOR_TRANSPORT_GOOD; unsigned char *buffer; unsigned int len; unsigned int sector; unsigned int amount; struct scatterlist *sg = NULL; int sg_segment = 0; int sg_offset = 0; US_DEBUGP("handle_read10: transfersize %d\n", srb->transfersize); if (srb->request_bufflen < 0x10000) { result = usbat_rw_block_test(us, USBAT_ATA, registers, data, 19, 0x10, 0x17, 0xFD, 0x30, SCSI_DATA_READ, srb->request_buffer, srb->request_bufflen, srb->use_sg, 1); return result; } /* * Since we're requesting more data than we can handle in * a single read command (max is 64k-1), we will perform * multiple reads, but each read must be in multiples of * a sector. Luckily the sector size is in srb->transfersize * (see linux/drivers/scsi/sr.c). */ if (data[7+0] == GPCMD_READ_CD) { len = short_pack(data[7+9], data[7+8]); len <<= 16; len |= data[7+7]; US_DEBUGP("handle_read10: GPCMD_READ_CD: len %d\n", len); srb->transfersize = srb->request_bufflen/len; } if (!srb->transfersize) { srb->transfersize = 2048; /* A guess */ US_DEBUGP("handle_read10: transfersize 0, forcing %d\n", srb->transfersize); } len = (65535/srb->transfersize) * srb->transfersize; US_DEBUGP("Max read is %d bytes\n", len); buffer = kmalloc(len, GFP_NOIO); if (buffer == NULL) // bloody hell! return USB_STOR_TRANSPORT_FAILED; sector = short_pack(data[7+3], data[7+2]); sector <<= 16; sector |= short_pack(data[7+5], data[7+4]); transferred = 0; if (srb->use_sg) { sg = (struct scatterlist *)srb->request_buffer; sg_segment = 0; // for keeping track of where we are in sg_offset = 0; // the scatter/gather list } while (transferred != srb->request_bufflen) { if (len > srb->request_bufflen - transferred) len = srb->request_bufflen - transferred; data[3] = len&0xFF; // (cylL) = expected length (L) data[4] = (len>>8)&0xFF; // (cylH) = expected length (H) // Fix up the SCSI command sector and num sectors data[7+2] = MSB_of(sector>>16); // SCSI command sector data[7+3] = LSB_of(sector>>16); data[7+4] = MSB_of(sector&0xFFFF); data[7+5] = LSB_of(sector&0xFFFF); if (data[7+0] == GPCMD_READ_CD) data[7+6] = 0; data[7+7] = MSB_of(len / srb->transfersize); // SCSI command data[7+8] = LSB_of(len / srb->transfersize); // num sectors result = usbat_rw_block_test(us, USBAT_ATA, registers, data, 19, 0x10, 0x17, 0xFD, 0x30, SCSI_DATA_READ, buffer, len, 0, 1); if (result != USB_STOR_TRANSPORT_GOOD) break; // Transfer the received data into the srb buffer if (!srb->use_sg) { memcpy(srb->request_buffer+transferred, buffer, len); } else { amount = 0; while (amount= sg[sg_segment].length-sg_offset) { memcpy(sg[sg_segment].address + sg_offset, buffer + amount, sg[sg_segment].length - sg_offset); amount += sg[sg_segment].length-sg_offset; sg_segment++; sg_offset=0; } else { memcpy(sg[sg_segment].address + sg_offset, buffer + amount, len - amount); sg_offset += (len - amount); amount = len; } } } // Update the amount transferred and the sector number transferred += len; sector += len / srb->transfersize; } // while transferred != srb->request_bufflen kfree(buffer); return result; } static int hp_8200e_select_and_test_registers(struct us_data *us) { int result; int selector; unsigned char status; // try device = master, then device = slave. for (selector = 0xA0; selector <= 0xB0; selector += 0x10) { if ( (result = usbat_write(us, USBAT_ATA, 0x16, selector)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x17, &status)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x16, &status)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x14, &status)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x15, &status)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_write(us, USBAT_ATA, 0x14, 0x55)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_write(us, USBAT_ATA, 0x15, 0xAA)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x14, &status)) != USB_STOR_TRANSPORT_GOOD) return result; if ( (result = usbat_read(us, USBAT_ATA, 0x15, &status)) != USB_STOR_TRANSPORT_GOOD) return result; } return result; } int init_8200e(struct us_data *us) { int result; unsigned char status; // Enable peripheral control signals if ( (result = usbat_write_user_io(us, USBAT_UIO_OE1 | USBAT_UIO_OE0, USBAT_UIO_EPAD | USBAT_UIO_1)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 1\n"); wait_ms(2000); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 2\n"); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 3\n"); // Reset peripheral, enable periph control signals // (bring reset signal up) if ( (result = usbat_write_user_io(us, USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0, USBAT_UIO_EPAD | USBAT_UIO_1)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 4\n"); // Enable periph control signals // (bring reset signal down) if ( (result = usbat_write_user_io(us, USBAT_UIO_OE1 | USBAT_UIO_OE0, USBAT_UIO_EPAD | USBAT_UIO_1)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 5\n"); wait_ms(250); // Write 0x80 to ISA port 0x3F if ( (result = usbat_write(us, USBAT_ISA, 0x3F, 0x80)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 6\n"); // Read ISA port 0x27 if ( (result = usbat_read(us, USBAT_ISA, 0x27, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 7\n"); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 8\n"); if ( (result = hp_8200e_select_and_test_registers(us)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 9\n"); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 10\n"); // Enable periph control signals and card detect if ( (result = usbat_write_user_io(us, USBAT_UIO_ACKD |USBAT_UIO_OE1 | USBAT_UIO_OE0, USBAT_UIO_EPAD | USBAT_UIO_1)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 11\n"); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 12\n"); wait_ms(1400); if ( (result = usbat_read_user_io(us, &status)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 13\n"); if ( (result = hp_8200e_select_and_test_registers(us)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 14\n"); if ( (result = usbat_set_shuttle_features(us, 0x83, 0x00, 0x88, 0x08, 0x15, 0x14)) != USB_STOR_TRANSPORT_GOOD) return result; US_DEBUGP("INIT 15\n"); return result; } /* * Transport for the HP 8200e */ int hp8200e_transport(Scsi_Cmnd *srb, struct us_data *us) { int result; unsigned char status; unsigned char registers[32]; unsigned char data[32]; unsigned int len; int i; char string[64]; len = srb->request_bufflen; /* Send A0 (ATA PACKET COMMAND). Note: I guess we're never going to get any of the ATA commands... just ATA Packet Commands. */ registers[0] = 0x11; registers[1] = 0x12; registers[2] = 0x13; registers[3] = 0x14; registers[4] = 0x15; registers[5] = 0x16; registers[6] = 0x17; data[0] = 0x00; data[1] = 0x00; data[2] = 0x00; data[3] = len&0xFF; // (cylL) = expected length (L) data[4] = (len>>8)&0xFF; // (cylH) = expected length (H) data[5] = 0xB0; // (device sel) = slave data[6] = 0xA0; // (command) = ATA PACKET COMMAND for (i=7; i<19; i++) { registers[i] = 0x10; data[i] = (i-7 >= srb->cmd_len) ? 0 : srb->cmnd[i-7]; } result = usbat_read(us, USBAT_ATA, 0x17, &status); US_DEBUGP("Status = %02X\n", status); if (srb->cmnd[0] == TEST_UNIT_READY) transferred = 0; if (srb->sc_data_direction == SCSI_DATA_WRITE) { result = usbat_rw_block_test(us, USBAT_ATA, registers, data, 19, 0x10, 0x17, 0xFD, 0x30, SCSI_DATA_WRITE, srb->request_buffer, len, srb->use_sg, 10); if (result == USB_STOR_TRANSPORT_GOOD) { transferred += len; US_DEBUGP("Wrote %08X bytes\n", transferred); } return result; } else if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == GPCMD_READ_CD) { return usbat_handle_read10(us, registers, data, srb); } if (len > 0xFFFF) { US_DEBUGP("Error: len = %08X... what do I do now?\n", len); return USB_STOR_TRANSPORT_ERROR; } if ( (result = usbat_multiple_write(us, USBAT_ATA, registers, data, 7)) != USB_STOR_TRANSPORT_GOOD) { return result; } // Write the 12-byte command header. // If the command is BLANK then set the timer for 75 minutes. // Otherwise set it for 10 minutes. // NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW // AT SPEED 4 IS UNRELIABLE!!! if ( (result = usbat_write_block(us, USBAT_ATA, 0x10, srb->cmnd, 12, 0, srb->cmnd[0]==GPCMD_BLANK ? 75 : 10)) != USB_STOR_TRANSPORT_GOOD) { return result; } // If there is response data to be read in // then do it here. if (len != 0 && (srb->sc_data_direction == SCSI_DATA_READ)) { // How many bytes to read in? Check cylL register if ( (result = usbat_read(us, USBAT_ATA, 0x14, &status)) != USB_STOR_TRANSPORT_GOOD) { return result; } if (len>0xFF) { // need to read cylH also len = status; if ( (result = usbat_read(us, USBAT_ATA, 0x15, &status)) != USB_STOR_TRANSPORT_GOOD) { return result; } len += ((unsigned int)status)<<8; } else len = status; result = usbat_read_block(us, USBAT_ATA, 0x10, srb->request_buffer, len, srb->use_sg); /* Debug-print the first 32 bytes of the transfer */ if (!srb->use_sg) { string[0] = 0; for (i=0; irequest_buffer)[i]); if ((i%16)==15) { US_DEBUGP("%s\n", string); string[0] = 0; } } if (string[0]!=0) US_DEBUGP("%s\n", string); } } return result; }