diff options
Diffstat (limited to 'drivers/usb/storage/shuttle_usbat.c')
| -rw-r--r-- | drivers/usb/storage/shuttle_usbat.c | 1712 |
1 files changed, 1712 insertions, 0 deletions
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c new file mode 100644 index 000000000000..7eff03d9b041 --- /dev/null +++ b/drivers/usb/storage/shuttle_usbat.c @@ -0,0 +1,1712 @@ +/* Driver for SCM Microsystems USB-ATAPI cable + * + * $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $ + * + * Current development and maintenance by: + * (c) 2000, 2001 Robert Baruch (autophile@starband.net) + * (c) 2004, 2005 Daniel Drake <dsd@gentoo.org> + * + * Developed with the assistance of: + * (c) 2002 Alan Stern <stern@rowland.org> + * + * Flash support based on earlier work by: + * (c) 2002 Thomas Kreiling <usbdev@sm04.de> + * + * 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. + * + * See the Kconfig help text for a list of devices known to be supported by + * this driver. + * + * 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 <linux/sched.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/cdrom.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> + +#include "usb.h" +#include "transport.h" +#include "protocol.h" +#include "debug.h" +#include "shuttle_usbat.h" + +#define short_pack(LSB,MSB) ( ((u16)(LSB)) | ( ((u16)(MSB))<<8 ) ) +#define LSB_of(s) ((s)&0xFF) +#define MSB_of(s) ((s)>>8) + +static int transferred = 0; + +static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us); +static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us); + +/* + * Convenience function to produce an ATAPI read/write sectors command + * Use cmd=0x20 for read, cmd=0x30 for write + */ +static void usbat_pack_atapi_sector_cmd(unsigned char *buf, + unsigned char thistime, + u32 sector, unsigned char cmd) +{ + buf[0] = 0; + buf[1] = thistime; + buf[2] = sector & 0xFF; + buf[3] = (sector >> 8) & 0xFF; + buf[4] = (sector >> 16) & 0xFF; + buf[5] = 0xE0 | ((sector >> 24) & 0x0F); + buf[6] = cmd; +} + +/* + * Convenience function to get the device type (flash or hp8200) + */ +static int usbat_get_device_type(struct us_data *us) +{ + return ((struct usbat_info*)us->extra)->devicetype; +} + +/* + * Read a register from the device + */ +static int usbat_read(struct us_data *us, + unsigned char access, + unsigned char reg, + unsigned char *content) +{ + return usb_stor_ctrl_transfer(us, + us->recv_ctrl_pipe, + access | USBAT_CMD_READ_REG, + 0xC0, + (u16)reg, + 0, + content, + 1); +} + +/* + * Write to a register on the device + */ +static int usbat_write(struct us_data *us, + unsigned char access, + unsigned char reg, + unsigned char content) +{ + return usb_stor_ctrl_transfer(us, + us->send_ctrl_pipe, + access | USBAT_CMD_WRITE_REG, + 0x40, + short_pack(reg, content), + 0, + NULL, + 0); +} + +/* + * Convenience function to perform a bulk read + */ +static int usbat_bulk_read(struct us_data *us, + unsigned char *data, + unsigned int len) +{ + if (len == 0) + return USB_STOR_XFER_GOOD; + + US_DEBUGP("usbat_bulk_read: len = %d\n", len); + return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, data, len, NULL); +} + +/* + * Convenience function to perform a bulk write + */ +static int usbat_bulk_write(struct us_data *us, + unsigned char *data, + unsigned int len) +{ + if (len == 0) + return USB_STOR_XFER_GOOD; + + US_DEBUGP("usbat_bulk_write: len = %d\n", len); + return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, data, len, NULL); +} + +/* + * Some USBAT-specific commands can only be executed over a command transport + * This transport allows one (len=8) or two (len=16) vendor-specific commands + * to be executed. + */ +static int usbat_execute_command(struct us_data *us, + unsigned char *commands, + unsigned int len) +{ + return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe, + USBAT_CMD_EXEC_CMD, 0x40, 0, 0, + commands, len); +} + +/* + * Read the status register + */ +static int usbat_get_status(struct us_data *us, unsigned char *status) +{ + int rc; + rc = usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status); + + US_DEBUGP("usbat_get_status: 0x%02X\n", (unsigned short) (*status)); + return rc; +} + +/* + * Check the device status + */ +static int usbat_check_status(struct us_data *us) +{ + unsigned char *reply = us->iobuf; + int rc; + + if (!us) + return USB_STOR_TRANSPORT_ERROR; + + rc = usbat_get_status(us, reply); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + if (*reply & 0x01 && *reply != 0x51) // error/check condition (0x51 is ok) + return USB_STOR_TRANSPORT_FAILED; + + if (*reply & 0x20) // device fault + return USB_STOR_TRANSPORT_FAILED; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Stores critical information in internal registers in prepartion for the execution + * of a conditional usbat_read_blocks or usbat_write_blocks call. + */ +static 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) +{ + unsigned char *command = us->iobuf; + + command[0] = 0x40; + command[1] = USBAT_CMD_SET_FEAT; + + // The only bit relevant to ATA access is bit 6 + // which defines 8 bit data access (set) or 16 bit (unset) + command[2] = epp_control; + + // If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1, + // ET1 and ET2 define an external event to be checked for on event of a + // _read_blocks or _write_blocks operation. The read/write will not take + // place unless the defined trigger signal is active. + command[3] = external_trigger; + + // The resultant byte of the mask operation (see mask_byte) is compared for + // equivalence with this test pattern. If equal, the read/write will take + // place. + command[4] = test_pattern; + + // This value is logically ANDed with the status register field specified + // in the read/write command. + command[5] = mask_byte; + + // If ALQ is set in the qualifier, this field contains the address of the + // registers where the byte count should be read for transferring the data. + // If ALQ is not set, then this field contains the number of bytes to be + // transferred. + command[6] = subcountL; + command[7] = subcountH; + + return usbat_execute_command(us, command, 8); +} + +/* + * Block, waiting for an ATA device to become not busy or to report + * an error condition. + */ +static int usbat_wait_not_busy(struct us_data *us, int minutes) +{ + int i; + int result; + unsigned char *status = us->iobuf; + + /* 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_get_status(us, status); + + if (result!=USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + 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) + msleep(10); // 5 seconds + else if (i<700) + msleep(50); // 10 seconds + else if (i<1200) + msleep(100); // 50 seconds + else + msleep(1000); // X minutes + } + + US_DEBUGP("Waited not busy for %d minutes, timing out.\n", + minutes); + return USB_STOR_TRANSPORT_FAILED; +} + +/* + * Read block data from the data register + */ +static int usbat_read_block(struct us_data *us, + unsigned char *content, + unsigned short len) +{ + int result; + unsigned char *command = us->iobuf; + + if (!len) + return USB_STOR_TRANSPORT_GOOD; + + command[0] = 0xC0; + command[1] = USBAT_ATA | USBAT_CMD_READ_BLOCK; + command[2] = USBAT_ATA_DATA; + command[3] = 0; + command[4] = 0; + command[5] = 0; + command[6] = LSB_of(len); + command[7] = MSB_of(len); + + result = usbat_execute_command(us, command, 8); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + result = usbat_bulk_read(us, content, len); + return (result == USB_STOR_XFER_GOOD ? + USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR); +} + +/* + * Write block data via the data register + */ +static int usbat_write_block(struct us_data *us, + unsigned char access, + unsigned char *content, + unsigned short len, + int minutes) +{ + int result; + unsigned char *command = us->iobuf; + + if (!len) + return USB_STOR_TRANSPORT_GOOD; + + command[0] = 0x40; + command[1] = access | USBAT_CMD_WRITE_BLOCK; + command[2] = USBAT_ATA_DATA; + command[3] = 0; + command[4] = 0; + command[5] = 0; + command[6] = LSB_of(len); + command[7] = MSB_of(len); + + result = usbat_execute_command(us, command, 8); + + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + result = usbat_bulk_write(us, content, len); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + return usbat_wait_not_busy(us, minutes); +} + +/* + * Process read and write requests + */ +static int usbat_hp8200e_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; + unsigned int pipe = (direction == DMA_FROM_DEVICE) ? + us->recv_bulk_pipe : us->send_bulk_pipe; + + unsigned char *command = us->iobuf; + int i, j; + int cmdlen; + unsigned char *data = us->iobuf; + unsigned char *status = us->iobuf; + + BUG_ON(num_registers > US_IOBUF_SIZE/2); + + for (i=0; i<20; i++) { + + /* + * The first time we send the full command, which consists + * of downloading the SCSI command followed by downloading + * the data via a write-and-test. Any other time we only + * send the command to download the data -- the SCSI command + * is still 'active' in some sense in the device. + * + * We're only going to try sending the data 10 times. After + * that, we just return a failure. + */ + + if (i==0) { + cmdlen = 16; + // Write to multiple registers + // Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here, + // but that's what came out of the trace every single time. + command[0] = 0x40; + command[1] = access | USBAT_CMD_WRITE_REGS; + command[2] = 0x07; + command[3] = 0x17; + command[4] = 0xFC; + command[5] = 0xE7; + command[6] = LSB_of(num_registers*2); + command[7] = MSB_of(num_registers*2); + } else + cmdlen = 8; + + // Conditionally read or write blocks + command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0); + command[cmdlen-7] = access | + (direction==DMA_TO_DEVICE ? + USBAT_CMD_COND_WRITE_BLOCK : USBAT_CMD_COND_READ_BLOCK); + command[cmdlen-6] = data_reg; + command[cmdlen-5] = status_reg; + command[cmdlen-4] = timeout; + command[cmdlen-3] = qualifier; + command[cmdlen-2] = LSB_of(len); + command[cmdlen-1] = MSB_of(len); + + result = usbat_execute_command(us, command, cmdlen); + + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (i==0) { + + for (j=0; j<num_registers; j++) { + data[j<<1] = registers[j]; + data[1+(j<<1)] = data_out[j]; + } + + result = usbat_bulk_write(us, data, num_registers*2); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + } + + + //US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n", + // direction == DMA_TO_DEVICE ? "out" : "in", + // len, use_sg); + + result = usb_stor_bulk_transfer_sg(us, + pipe, content, len, use_sg, NULL); + + /* + * 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 == USB_STOR_XFER_SHORT || + result == USB_STOR_XFER_STALLED) { + + /* + * If we're reading and we stalled, then clear + * the bulk output pipe only the first time. + */ + + if (direction==DMA_FROM_DEVICE && i==0) { + if (usb_stor_clear_halt(us, + us->send_bulk_pipe) < 0) + return USB_STOR_TRANSPORT_ERROR; + } + + /* + * Read status: is the device angry, or just busy? + */ + + result = usbat_read(us, USBAT_ATA, + direction==DMA_TO_DEVICE ? + USBAT_ATA_STATUS : USBAT_ATA_ALTSTATUS, + status); + + if (result!=USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + 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==DMA_TO_DEVICE ? "write" : "read"); + + } else if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + else + return usbat_wait_not_busy(us, minutes); + + } + + US_DEBUGP("Bummer! %s bulk data 20 times failed.\n", + direction==DMA_TO_DEVICE ? "Writing" : "Reading"); + + return USB_STOR_TRANSPORT_FAILED; +} + +/* + * Write to multiple registers: + * Allows us to write specific data to any registers. The data to be written + * gets packed in this sequence: reg0, data0, reg1, data1, ..., regN, dataN + * which gets sent through bulk out. + * Not designed for large transfers of data! + */ +static int usbat_multiple_write(struct us_data *us, + unsigned char *registers, + unsigned char *data_out, + unsigned short num_registers) +{ + int i, result; + unsigned char *data = us->iobuf; + unsigned char *command = us->iobuf; + + BUG_ON(num_registers > US_IOBUF_SIZE/2); + + // Write to multiple registers, ATA access + command[0] = 0x40; + command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS; + + // No relevance + command[2] = 0; + command[3] = 0; + command[4] = 0; + command[5] = 0; + + // Number of bytes to be transferred (incl. addresses and data) + command[6] = LSB_of(num_registers*2); + command[7] = MSB_of(num_registers*2); + + // The setup command + result = usbat_execute_command(us, command, 8); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + // Create the reg/data, reg/data sequence + for (i=0; i<num_registers; i++) { + data[i<<1] = registers[i]; + data[1+(i<<1)] = data_out[i]; + } + + // Send the data + result = usbat_bulk_write(us, data, num_registers*2); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_get_device_type(us) == USBAT_DEV_HP8200) + return usbat_wait_not_busy(us, 0); + else + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Conditionally read blocks from device: + * Allows us to read blocks from a specific data register, based upon the + * condition that a status register can be successfully masked with a status + * qualifier. If this condition is not initially met, the read will wait + * up until a maximum amount of time has elapsed, as specified by timeout. + * The read will start when the condition is met, otherwise the command aborts. + * + * The qualifier defined here is not the value that is masked, it defines + * conditions for the write to take place. The actual masked qualifier (and + * other related details) are defined beforehand with _set_shuttle_features(). + */ +static int usbat_read_blocks(struct us_data *us, + unsigned char *buffer, + int len) +{ + int result; + unsigned char *command = us->iobuf; + + command[0] = 0xC0; + command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK; + command[2] = USBAT_ATA_DATA; + command[3] = USBAT_ATA_STATUS; + command[4] = 0xFD; // Timeout (ms); + command[5] = USBAT_QUAL_FCQ; + command[6] = LSB_of(len); + command[7] = MSB_of(len); + + // Multiple block read setup command + result = usbat_execute_command(us, command, 8); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + // Read the blocks we just asked for + result = usbat_bulk_read(us, buffer, len); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Conditionally write blocks to device: + * Allows us to write blocks to a specific data register, based upon the + * condition that a status register can be successfully masked with a status + * qualifier. If this condition is not initially met, the write will wait + * up until a maximum amount of time has elapsed, as specified by timeout. + * The read will start when the condition is met, otherwise the command aborts. + * + * The qualifier defined here is not the value that is masked, it defines + * conditions for the write to take place. The actual masked qualifier (and + * other related details) are defined beforehand with _set_shuttle_features(). + */ +static int usbat_write_blocks(struct us_data *us, + unsigned char *buffer, + int len) +{ + int result; + unsigned char *command = us->iobuf; + + command[0] = 0x40; + command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK; + command[2] = USBAT_ATA_DATA; + command[3] = USBAT_ATA_STATUS; + command[4] = 0xFD; // Timeout (ms) + command[5] = USBAT_QUAL_FCQ; + command[6] = LSB_of(len); + command[7] = MSB_of(len); + + // Multiple block write setup command + result = usbat_execute_command(us, command, 8); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + // Write the data + result = usbat_bulk_write(us, buffer, len); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Read the User IO register + */ +static int usbat_read_user_io(struct us_data *us, unsigned char *data_flags) +{ + int result; + + result = usb_stor_ctrl_transfer(us, + us->recv_ctrl_pipe, + USBAT_CMD_UIO, + 0xC0, + 0, + 0, + data_flags, + USBAT_UIO_READ); + + US_DEBUGP("usbat_read_user_io: UIO register reads %02X\n", (unsigned short) (*data_flags)); + + return result; +} + +/* + * Write to the User IO register + */ +static int usbat_write_user_io(struct us_data *us, + unsigned char enable_flags, + unsigned char data_flags) +{ + return usb_stor_ctrl_transfer(us, + us->send_ctrl_pipe, + USBAT_CMD_UIO, + 0x40, + short_pack(enable_flags, data_flags), + 0, + NULL, + USBAT_UIO_WRITE); +} + +/* + * Reset the device + * Often needed on media change. + */ +static int usbat_device_reset(struct us_data *us) +{ + int rc; + + // Reset peripheral, enable peripheral control signals + // (bring reset signal up) + rc = usbat_write_user_io(us, + USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0, + USBAT_UIO_EPAD | USBAT_UIO_1); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + // Enable peripheral control signals + // (bring reset signal down) + rc = usbat_write_user_io(us, + USBAT_UIO_OE1 | USBAT_UIO_OE0, + USBAT_UIO_EPAD | USBAT_UIO_1); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Enable card detect + */ +static int usbat_device_enable_cdt(struct us_data *us) +{ + int rc; + + // Enable peripheral control signals and card detect + rc = usbat_write_user_io(us, + USBAT_UIO_ACKD | USBAT_UIO_OE1 | USBAT_UIO_OE0, + USBAT_UIO_EPAD | USBAT_UIO_1); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Determine if media is present. + */ +static int usbat_flash_check_media_present(unsigned char *uio) +{ + if (*uio & USBAT_UIO_UI0) { + US_DEBUGP("usbat_flash_check_media_present: no media detected\n"); + return USBAT_FLASH_MEDIA_NONE; + } + + return USBAT_FLASH_MEDIA_CF; +} + +/* + * Determine if media has changed since last operation + */ +static int usbat_flash_check_media_changed(unsigned char *uio) +{ + if (*uio & USBAT_UIO_0) { + US_DEBUGP("usbat_flash_check_media_changed: media change detected\n"); + return USBAT_FLASH_MEDIA_CHANGED; + } + + return USBAT_FLASH_MEDIA_SAME; +} + +/* + * Check for media change / no media and handle the situation appropriately + */ +static int usbat_flash_check_media(struct us_data *us, + struct usbat_info *info) +{ + int rc; + unsigned char *uio = us->iobuf; + + rc = usbat_read_user_io(us, uio); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + // Check for media existance + rc = usbat_flash_check_media_present(uio); + if (rc == USBAT_FLASH_MEDIA_NONE) { + info->sense_key = 0x02; + info->sense_asc = 0x3A; + info->sense_ascq = 0x00; + return USB_STOR_TRANSPORT_FAILED; + } + + // Check for media change + rc = usbat_flash_check_media_changed(uio); + if (rc == USBAT_FLASH_MEDIA_CHANGED) { + + // Reset and re-enable card detect + rc = usbat_device_reset(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + rc = usbat_device_enable_cdt(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + msleep(50); + + rc = usbat_read_user_io(us, uio); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + info->sense_key = UNIT_ATTENTION; + info->sense_asc = 0x28; + info->sense_ascq = 0x00; + return USB_STOR_TRANSPORT_FAILED; + } + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Determine whether we are controlling a flash-based reader/writer, + * or a HP8200-based CD drive. + * Sets transport functions as appropriate. + */ +static int usbat_identify_device(struct us_data *us, + struct usbat_info *info) +{ + int rc; + unsigned char status; + + if (!us || !info) + return USB_STOR_TRANSPORT_ERROR; + + rc = usbat_device_reset(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + /* + * By examining the device signature after a reset, we can identify + * whether the device supports the ATAPI packet interface. + * The flash-devices do not support this, whereas the HP CDRW's obviously + * do. + * + * This method is not ideal, but works because no other devices have been + * produced based on the USBAT/USBAT02. + * + * Section 9.1 of the ATAPI-4 spec states (amongst other things) that + * after a device reset, a Cylinder low of 0x14 indicates that the device + * does support packet commands. + */ + rc = usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, &status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("usbat_identify_device: Cylinder low is %02X\n", status); + + if (status == 0x14) { + // Device is HP 8200 + US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n"); + info->devicetype = USBAT_DEV_HP8200; + } else { + // Device is a CompactFlash reader/writer + US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n"); + info->devicetype = USBAT_DEV_FLASH; + } + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Set the transport function based on the device type + */ +static int usbat_set_transport(struct us_data *us, + struct usbat_info *info) +{ + int rc; + + if (!info->devicetype) { + rc = usbat_identify_device(us, info); + if (rc != USB_STOR_TRANSPORT_GOOD) { + US_DEBUGP("usbat_set_transport: Could not identify device\n"); + return 1; + } + } + + if (usbat_get_device_type(us) == USBAT_DEV_HP8200) + us->transport = usbat_hp8200e_transport; + else if (usbat_get_device_type(us) == USBAT_DEV_FLASH) + us->transport = usbat_flash_transport; + + return 0; +} + +/* + * Read the media capacity + */ +static int usbat_flash_get_sector_count(struct us_data *us, + struct usbat_info *info) +{ + unsigned char registers[3] = { + USBAT_ATA_SECCNT, + USBAT_ATA_DEVICE, + USBAT_ATA_CMD, + }; + unsigned char command[3] = { 0x01, 0xA0, 0xEC }; + unsigned char *reply; + unsigned char status; + int rc; + + if (!us || !info) + return USB_STOR_TRANSPORT_ERROR; + + reply = kmalloc(512, GFP_NOIO); + if (!reply) + return USB_STOR_TRANSPORT_ERROR; + + // ATAPI command : IDENTIFY DEVICE + rc = usbat_multiple_write(us, registers, command, 3); + if (rc != USB_STOR_XFER_GOOD) { + US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n"); + rc = USB_STOR_TRANSPORT_ERROR; + goto leave; + } + + // Read device status + if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) { + rc = USB_STOR_TRANSPORT_ERROR; + goto leave; + } + + msleep(100); + + // Read the device identification data + rc = usbat_read_block(us, reply, 512); + if (rc != USB_STOR_TRANSPORT_GOOD) + goto leave; + + info->sectors = ((u32)(reply[117]) << 24) | + ((u32)(reply[116]) << 16) | + ((u32)(reply[115]) << 8) | + ((u32)(reply[114]) ); + + rc = USB_STOR_TRANSPORT_GOOD; + + leave: + kfree(reply); + return rc; +} + +/* + * Read data from device + */ +static int usbat_flash_read_data(struct us_data *us, + struct usbat_info *info, + u32 sector, + u32 sectors) +{ + unsigned char registers[7] = { + USBAT_ATA_FEATURES, + USBAT_ATA_SECCNT, + USBAT_ATA_SECNUM, + USBAT_ATA_LBA_ME, + USBAT_ATA_LBA_HI, + USBAT_ATA_DEVICE, + USBAT_ATA_STATUS, + }; + unsigned char command[7]; + unsigned char *buffer; + unsigned char thistime; + unsigned int totallen, alloclen; + int len, result; + unsigned int sg_idx = 0, sg_offset = 0; + + result = usbat_flash_check_media(us, info); + if (result != USB_STOR_TRANSPORT_GOOD) + return result; + + // we're working in LBA mode. according to the ATA spec, + // we can support up to 28-bit addressing. I don't know if Jumpshot + // supports beyond 24-bit addressing. It's kind of hard to test + // since it requires > 8GB CF card. + + if (sector > 0x0FFFFFFF) + return USB_STOR_TRANSPORT_ERROR; + + totallen = sectors * info->ssize; + + // Since we don't read more than 64 KB at a time, we have to create + // a bounce buffer and move the data a piece at a time between the + // bounce buffer and the actual transfer buffer. + + alloclen = min(totallen, 65536u); + buffer = kmalloc(alloclen, GFP_NOIO); + if (buffer == NULL) + return USB_STOR_TRANSPORT_ERROR; + + do { + // loop, never allocate or transfer more than 64k at once + // (min(128k, 255*info->ssize) is the real limit) + len = min(totallen, alloclen); + thistime = (len / info->ssize) & 0xff; + + // ATAPI command 0x20 (READ SECTORS) + usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x20); + + // Write/execute ATAPI read command + result = usbat_multiple_write(us, registers, command, 7); + if (result != USB_STOR_TRANSPORT_GOOD) + goto leave; + + // Read the data we just requested + result = usbat_read_blocks(us, buffer, len); + if (result != USB_STOR_TRANSPORT_GOOD) + goto leave; + + US_DEBUGP("usbat_flash_read_data: %d bytes\n", len); + + // Store the data in the transfer buffer + usb_stor_access_xfer_buf(buffer, len, us->srb, + &sg_idx, &sg_offset, TO_XFER_BUF); + + sector += thistime; + totallen -= len; + } while (totallen > 0); + + kfree(buffer); + return USB_STOR_TRANSPORT_GOOD; + +leave: + kfree(buffer); + return USB_STOR_TRANSPORT_ERROR; +} + +/* + * Write data to device + */ +static int usbat_flash_write_data(struct us_data *us, + struct usbat_info *info, + u32 sector, + u32 sectors) +{ + unsigned char registers[7] = { + USBAT_ATA_FEATURES, + USBAT_ATA_SECCNT, + USBAT_ATA_SECNUM, + USBAT_ATA_LBA_ME, + USBAT_ATA_LBA_HI, + USBAT_ATA_DEVICE, + USBAT_ATA_STATUS, + }; + unsigned char command[7]; + unsigned char *buffer; + unsigned char thistime; + unsigned int totallen, alloclen; + int len, result; + unsigned int sg_idx = 0, sg_offset = 0; + + result = usbat_flash_check_media(us, info); + if (result != USB_STOR_TRANSPORT_GOOD) + return result; + + // we're working in LBA mode. according to the ATA spec, + // we can support up to 28-bit addressing. I don't know if Jumpshot + // supports beyond 24-bit addressing. It's kind of hard to test + // since it requires > 8GB CF card. + + if (sector > 0x0FFFFFFF) + return USB_STOR_TRANSPORT_ERROR; + + totallen = sectors * info->ssize; + + // Since we don't write more than 64 KB at a time, we have to create + // a bounce buffer and move the data a piece at a time between the + // bounce buffer and the actual transfer buffer. + + alloclen = min(totallen, 65536u); + buffer = kmalloc(alloclen, GFP_NOIO); + if (buffer == NULL) + return USB_STOR_TRANSPORT_ERROR; + + do { + // loop, never allocate or transfer more than 64k at once + // (min(128k, 255*info->ssize) is the real limit) + len = min(totallen, alloclen); + thistime = (len / info->ssize) & 0xff; + + // Get the data from the transfer buffer + usb_stor_access_xfer_buf(buffer, len, us->srb, + &sg_idx, &sg_offset, FROM_XFER_BUF); + + // ATAPI command 0x30 (WRITE SECTORS) + usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x30); + + // Write/execute ATAPI write command + result = usbat_multiple_write(us, registers, command, 7); + if (result != USB_STOR_TRANSPORT_GOOD) + goto leave; + + // Write the data + result = usbat_write_blocks(us, buffer, len); + if (result != USB_STOR_TRANSPORT_GOOD) + goto leave; + + sector += thistime; + totallen -= len; + } while (totallen > 0); + + kfree(buffer); + return result; + +leave: + kfree(buffer); + return USB_STOR_TRANSPORT_ERROR; +} + +/* + * Squeeze a potentially huge (> 65535 byte) read10 command into + * a little ( <= 65535 byte) ATAPI pipe + */ +static int usbat_hp8200e_handle_read10(struct us_data *us, + unsigned char *registers, + unsigned char *data, + struct scsi_cmnd *srb) +{ + int result = USB_STOR_TRANSPORT_GOOD; + unsigned char *buffer; + unsigned int len; + unsigned int sector; + unsigned int sg_segment = 0; + unsigned int sg_offset = 0; + + US_DEBUGP("handle_read10: transfersize %d\n", + srb->transfersize); + + if (srb->request_bufflen < 0x10000) { + + result = usbat_hp8200e_rw_block_test(us, USBAT_ATA, + registers, data, 19, + USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD, + (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ), + DMA_FROM_DEVICE, + 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); + } + + // Since we only read in one block at a time, we have to create + // a bounce buffer and move the data a piece at a time between the + // bounce buffer and the actual transfer buffer. + + len = (65535/srb->transfersize) * srb->transfersize; + US_DEBUGP("Max read is %d bytes\n", len); + len = min(len, srb->request_bufflen); + 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; + + 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_hp8200e_rw_block_test(us, USBAT_ATA, + registers, data, 19, + USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD, + (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ), + DMA_FROM_DEVICE, + buffer, + len, 0, 1); + + if (result != USB_STOR_TRANSPORT_GOOD) + break; + + // Store the data in the transfer buffer + usb_stor_access_xfer_buf(buffer, len, srb, + &sg_segment, &sg_offset, TO_XFER_BUF); + + // 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 usbat_select_and_test_registers(struct us_data *us) +{ + int selector; + unsigned char *status = us->iobuf; + unsigned char max_selector = 0xB0; + if (usbat_get_device_type(us) == USBAT_DEV_FLASH) + max_selector = 0xA0; + + // try device = master, then device = slave. + + for (selector = 0xA0; selector <= max_selector; selector += 0x10) { + + if (usbat_get_device_type(us) == USBAT_DEV_HP8200 && + usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_STATUS, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_DEVICE, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_ME, 0x55) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_write(us, USBAT_ATA, USBAT_ATA_LBA_HI, 0xAA) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) != + USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + } + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Initialize the USBAT processor and the storage device + */ +int init_usbat(struct us_data *us) +{ + int rc; + struct usbat_info *info; + unsigned char subcountH = USBAT_ATA_LBA_HI; + unsigned char subcountL = USBAT_ATA_LBA_ME; + unsigned char *status = us->iobuf; + + us->extra = kmalloc(sizeof(struct usbat_info), GFP_NOIO); + if (!us->extra) { + US_DEBUGP("init_usbat: Gah! Can't allocate storage for usbat info struct!\n"); + return 1; + } + memset(us->extra, 0, sizeof(struct usbat_info)); + info = (struct usbat_info *) (us->extra); + + // Enable peripheral control signals + rc = usbat_write_user_io(us, + USBAT_UIO_OE1 | USBAT_UIO_OE0, + USBAT_UIO_EPAD | USBAT_UIO_1); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 1\n"); + + msleep(2000); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + US_DEBUGP("INIT 2\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 3\n"); + + // At this point, we need to detect which device we are using + if (usbat_set_transport(us, info)) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 4\n"); + + if (usbat_get_device_type(us) == USBAT_DEV_HP8200) { + msleep(250); + + // Write 0x80 to ISA port 0x3F + rc = usbat_write(us, USBAT_ISA, 0x3F, 0x80); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 5\n"); + + // Read ISA port 0x27 + rc = usbat_read(us, USBAT_ISA, 0x27, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 6\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 7\n"); + } + + rc = usbat_select_and_test_registers(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + US_DEBUGP("INIT 8\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 9\n"); + + // Enable peripheral control signals and card detect + rc = usbat_device_enable_cdt(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + US_DEBUGP("INIT 10\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 11\n"); + + msleep(1400); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 12\n"); + + rc = usbat_select_and_test_registers(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + US_DEBUGP("INIT 13\n"); + + if (usbat_get_device_type(us) == USBAT_DEV_FLASH) { + subcountH = 0x02; + subcountL = 0x00; + } + rc = usbat_set_shuttle_features(us, (USBAT_FEAT_ETEN | USBAT_FEAT_ET2 | USBAT_FEAT_ET1), + 0x00, 0x88, 0x08, subcountH, subcountL); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + US_DEBUGP("INIT 14\n"); + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Transport for the HP 8200e + */ +static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us) +{ + int result; + unsigned char *status = us->iobuf; + 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] = USBAT_ATA_FEATURES; + registers[1] = USBAT_ATA_SECCNT; + registers[2] = USBAT_ATA_SECNUM; + registers[3] = USBAT_ATA_LBA_ME; + registers[4] = USBAT_ATA_LBA_HI; + registers[5] = USBAT_ATA_DEVICE; + registers[6] = USBAT_ATA_CMD; + 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_get_status(us, status); + US_DEBUGP("Status = %02X\n", *status); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + if (srb->cmnd[0] == TEST_UNIT_READY) + transferred = 0; + + if (srb->sc_data_direction == DMA_TO_DEVICE) { + + result = usbat_hp8200e_rw_block_test(us, USBAT_ATA, + registers, data, 19, + USBAT_ATA_DATA, USBAT_ATA_STATUS, 0xFD, + (USBAT_QUAL_FCQ | USBAT_QUAL_ALQ), + DMA_TO_DEVICE, + 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_hp8200e_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, + 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, srb->cmnd, 12, + 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 == DMA_FROM_DEVICE)) { + + // How many bytes to read in? Check cylL register + + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) != + USB_STOR_XFER_GOOD) { + return USB_STOR_TRANSPORT_ERROR; + } + + if (len > 0xFF) { // need to read cylH also + len = *status; + if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) != + USB_STOR_XFER_GOOD) { + return USB_STOR_TRANSPORT_ERROR; + } + len += ((unsigned int) *status)<<8; + } + else + len = *status; + + + result = usbat_read_block(us, srb->request_buffer, len); + + /* Debug-print the first 32 bytes of the transfer */ + + if (!srb->use_sg) { + string[0] = 0; + for (i=0; i<len && i<32; i++) { + sprintf(string+strlen(string), "%02X ", + ((unsigned char *)srb->request_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; +} + +/* + * Transport for USBAT02-based CompactFlash and similar storage devices + */ +static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us) +{ + int rc; + struct usbat_info *info = (struct usbat_info *) (us->extra); + unsigned long block, blocks; + unsigned char *ptr = us->iobuf; + static unsigned char inquiry_response[36] = { + 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00 + }; + + if (srb->cmnd[0] == INQUIRY) { + US_DEBUGP("usbat_flash_transport: INQUIRY. Returning bogus response.\n"); + memcpy(ptr, inquiry_response, sizeof(inquiry_response)); + fill_inquiry_response(us, ptr, 36); + return USB_STOR_TRANSPORT_GOOD; + } + + if (srb->cmnd[0] == READ_CAPACITY) { + rc = usbat_flash_check_media(us, info); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + rc = usbat_flash_get_sector_count(us, info); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec + US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n", + info->sectors, info->ssize); + + // build the reply + // note: must return the sector number of the last sector, + // *not* the total number of sectors + ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1); + ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize); + usb_stor_set_xfer_buf(ptr, 8, srb); + + return USB_STOR_TRANSPORT_GOOD; + } + + if (srb->cmnd[0] == MODE_SELECT_10) { + US_DEBUGP("usbat_flash_transport: Gah! MODE_SELECT_10.\n"); + return USB_STOR_TRANSPORT_ERROR; + } + + if (srb->cmnd[0] == READ_10) { + block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | + ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); + + blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); + + US_DEBUGP("usbat_flash_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks); + return usbat_flash_read_data(us, info, block, blocks); + } + + if (srb->cmnd[0] == READ_12) { + // I don't think we'll ever see a READ_12 but support it anyway... + block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | + ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); + + blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | + ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); + + US_DEBUGP("usbat_flash_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks); + return usbat_flash_read_data(us, info, block, blocks); + } + + if (srb->cmnd[0] == WRITE_10) { + block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | + ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); + + blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); + + US_DEBUGP("usbat_flash_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks); + return usbat_flash_write_data(us, info, block, blocks); + } + + if (srb->cmnd[0] == WRITE_12) { + // I don't think we'll ever see a WRITE_12 but support it anyway... + block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | + ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); + + blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | + ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); + + US_DEBUGP("usbat_flash_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks); + return usbat_flash_write_data(us, info, block, blocks); + } + + + if (srb->cmnd[0] == TEST_UNIT_READY) { + US_DEBUGP("usbat_flash_transport: TEST_UNIT_READY.\n"); + + rc = usbat_flash_check_media(us, info); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + return usbat_check_status(us); + } + + if (srb->cmnd[0] == REQUEST_SENSE) { + US_DEBUGP("usbat_flash_transport: REQUEST_SENSE.\n"); + + memset(ptr, 0, 18); + ptr[0] = 0xF0; + ptr[2] = info->sense_key; + ptr[7] = 11; + ptr[12] = info->sense_asc; + ptr[13] = info->sense_ascq; + usb_stor_set_xfer_buf(ptr, 18, srb); + + return USB_STOR_TRANSPORT_GOOD; + } + + if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { + // sure. whatever. not like we can stop the user from popping + // the media out of the device (no locking doors, etc) + return USB_STOR_TRANSPORT_GOOD; + } + + US_DEBUGP("usbat_flash_transport: Gah! Unknown command: %d (0x%x)\n", + srb->cmnd[0], srb->cmnd[0]); + info->sense_key = 0x05; + info->sense_asc = 0x20; + info->sense_ascq = 0x00; + return USB_STOR_TRANSPORT_FAILED; +} + +/* + * Default transport function. Attempts to detect which transport function + * should be called, makes it the new default, and calls it. + * + * This function should never be called. Our usbat_init() function detects the + * device type and changes the us->transport ptr to the transport function + * relevant to the device. + * However, we'll support this impossible(?) case anyway. + */ +int usbat_transport(struct scsi_cmnd *srb, struct us_data *us) +{ + struct usbat_info *info = (struct usbat_info*) (us->extra); + + if (usbat_set_transport(us, info)) + return USB_STOR_TRANSPORT_ERROR; + + return us->transport(srb, us); +} + |
