diff options
Diffstat (limited to 'drivers/usb/storage/shuttle_usbat.c')
| -rw-r--r-- | drivers/usb/storage/shuttle_usbat.c | 1871 |
1 files changed, 1871 insertions, 0 deletions
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c new file mode 100644 index 000000000..854498e10 --- /dev/null +++ b/drivers/usb/storage/shuttle_usbat.c @@ -0,0 +1,1871 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable + * + * 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. + */ + +#include <linux/errno.h> +#include <linux/module.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 "scsiglue.h" + +#define DRV_NAME "ums-usbat" + +MODULE_DESCRIPTION("Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable"); +MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>, Robert Baruch <autophile@starband.net>"); +MODULE_LICENSE("GPL"); + +/* Supported device types */ +#define USBAT_DEV_HP8200 0x01 +#define USBAT_DEV_FLASH 0x02 + +#define USBAT_EPP_PORT 0x10 +#define USBAT_EPP_REGISTER 0x30 +#define USBAT_ATA 0x40 +#define USBAT_ISA 0x50 + +/* Commands (need to be logically OR'd with an access type */ +#define USBAT_CMD_READ_REG 0x00 +#define USBAT_CMD_WRITE_REG 0x01 +#define USBAT_CMD_READ_BLOCK 0x02 +#define USBAT_CMD_WRITE_BLOCK 0x03 +#define USBAT_CMD_COND_READ_BLOCK 0x04 +#define USBAT_CMD_COND_WRITE_BLOCK 0x05 +#define USBAT_CMD_WRITE_REGS 0x07 + +/* Commands (these don't need an access type) */ +#define USBAT_CMD_EXEC_CMD 0x80 +#define USBAT_CMD_SET_FEAT 0x81 +#define USBAT_CMD_UIO 0x82 + +/* Methods of accessing UIO register */ +#define USBAT_UIO_READ 1 +#define USBAT_UIO_WRITE 0 + +/* Qualifier bits */ +#define USBAT_QUAL_FCQ 0x20 /* full compare */ +#define USBAT_QUAL_ALQ 0x10 /* auto load subcount */ + +/* USBAT Flash Media status types */ +#define USBAT_FLASH_MEDIA_NONE 0 +#define USBAT_FLASH_MEDIA_CF 1 + +/* USBAT Flash Media change types */ +#define USBAT_FLASH_MEDIA_SAME 0 +#define USBAT_FLASH_MEDIA_CHANGED 1 + +/* USBAT ATA registers */ +#define USBAT_ATA_DATA 0x10 /* read/write data (R/W) */ +#define USBAT_ATA_FEATURES 0x11 /* set features (W) */ +#define USBAT_ATA_ERROR 0x11 /* error (R) */ +#define USBAT_ATA_SECCNT 0x12 /* sector count (R/W) */ +#define USBAT_ATA_SECNUM 0x13 /* sector number (R/W) */ +#define USBAT_ATA_LBA_ME 0x14 /* cylinder low (R/W) */ +#define USBAT_ATA_LBA_HI 0x15 /* cylinder high (R/W) */ +#define USBAT_ATA_DEVICE 0x16 /* head/device selection (R/W) */ +#define USBAT_ATA_STATUS 0x17 /* device status (R) */ +#define USBAT_ATA_CMD 0x17 /* device command (W) */ +#define USBAT_ATA_ALTSTATUS 0x0E /* status (no clear IRQ) (R) */ + +/* USBAT User I/O Data registers */ +#define USBAT_UIO_EPAD 0x80 /* Enable Peripheral Control Signals */ +#define USBAT_UIO_CDT 0x40 /* Card Detect (Read Only) */ + /* CDT = ACKD & !UI1 & !UI0 */ +#define USBAT_UIO_1 0x20 /* I/O 1 */ +#define USBAT_UIO_0 0x10 /* I/O 0 */ +#define USBAT_UIO_EPP_ATA 0x08 /* 1=EPP mode, 0=ATA mode */ +#define USBAT_UIO_UI1 0x04 /* Input 1 */ +#define USBAT_UIO_UI0 0x02 /* Input 0 */ +#define USBAT_UIO_INTR_ACK 0x01 /* Interrupt (ATA/ISA)/Acknowledge (EPP) */ + +/* USBAT User I/O Enable registers */ +#define USBAT_UIO_DRVRST 0x80 /* Reset Peripheral */ +#define USBAT_UIO_ACKD 0x40 /* Enable Card Detect */ +#define USBAT_UIO_OE1 0x20 /* I/O 1 set=output/clr=input */ + /* If ACKD=1, set OE1 to 1 also. */ +#define USBAT_UIO_OE0 0x10 /* I/O 0 set=output/clr=input */ +#define USBAT_UIO_ADPRST 0x01 /* Reset SCM chip */ + +/* USBAT Features */ +#define USBAT_FEAT_ETEN 0x80 /* External trigger enable */ +#define USBAT_FEAT_U1 0x08 +#define USBAT_FEAT_U0 0x04 +#define USBAT_FEAT_ET1 0x02 +#define USBAT_FEAT_ET2 0x01 + +struct usbat_info { + int devicetype; + + /* Used for Flash readers only */ + unsigned long sectors; /* total sector count */ + unsigned long ssize; /* sector size in bytes */ + + unsigned char sense_key; + unsigned long sense_asc; /* additional sense code */ + unsigned long sense_ascq; /* additional sense code qualifier */ +}; + +#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); + +static int init_usbat_cd(struct us_data *us); +static int init_usbat_flash(struct us_data *us); + + +/* + * The table of devices + */ +#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ + vendorName, productName, useProtocol, useTransport, \ + initFunction, flags) \ +{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ + .driver_info = (flags) } + +static struct usb_device_id usbat_usb_ids[] = { +# include "unusual_usbat.h" + { } /* Terminating entry */ +}; +MODULE_DEVICE_TABLE(usb, usbat_usb_ids); + +#undef UNUSUAL_DEV + +/* + * The flags table + */ +#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ + vendor_name, product_name, use_protocol, use_transport, \ + init_function, Flags) \ +{ \ + .vendorName = vendor_name, \ + .productName = product_name, \ + .useProtocol = use_protocol, \ + .useTransport = use_transport, \ + .initFunction = init_function, \ +} + +static struct us_unusual_dev usbat_unusual_dev_list[] = { +# include "unusual_usbat.h" + { } /* Terminating entry */ +}; + +#undef UNUSUAL_DEV + +/* + * Convenience function to produce an ATA read/write sectors command + * Use cmd=0x20 for read, cmd=0x30 for write + */ +static void usbat_pack_ata_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, + void* buf, + unsigned int len, + int use_sg) +{ + if (len == 0) + return USB_STOR_XFER_GOOD; + + usb_stor_dbg(us, "len = %d\n", len); + return usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe, buf, len, use_sg, NULL); +} + +/* + * Convenience function to perform a bulk write + */ +static int usbat_bulk_write(struct us_data *us, + void* buf, + unsigned int len, + int use_sg) +{ + if (len == 0) + return USB_STOR_XFER_GOOD; + + usb_stor_dbg(us, "len = %d\n", len); + return usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe, buf, len, use_sg, 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); + + usb_stor_dbg(us, "0x%02X\n", *status); + return rc; +} + +/* + * Check the device status + */ +static int usbat_check_status(struct us_data *us) +{ + unsigned char *reply = us->iobuf; + int rc; + + rc = usbat_get_status(us, reply); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_FAILED; + + /* error/check condition (0x51 is ok) */ + if (*reply & 0x01 && *reply != 0x51) + return USB_STOR_TRANSPORT_FAILED; + + /* device fault */ + if (*reply & 0x20) + return USB_STOR_TRANSPORT_FAILED; + + return USB_STOR_TRANSPORT_GOOD; +} + +/* + * Stores critical information in internal registers in preparation 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 */ + usb_stor_dbg(us, "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 */ + } + + usb_stor_dbg(us, "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, + void* buf, + unsigned short len, + int use_sg) +{ + 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, buf, len, use_sg); + 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, + void* buf, + unsigned short len, + int minutes, + int use_sg) +{ + 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, buf, len, use_sg); + 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, + void *buf, + 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, 0); + if (result != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + } + + result = usb_stor_bulk_transfer_sg(us, + pipe, buf, 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; + + usb_stor_dbg(us, "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); + + } + + usb_stor_dbg(us, "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, 0); + 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, + void* buffer, + int len, + int use_sg) +{ + 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, use_sg); + 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, + void* buffer, + int len, + int use_sg) +{ + 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, use_sg); + 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); + + usb_stor_dbg(us, "UIO register reads %02X\n", *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(struct us_data *us, + unsigned char *uio) +{ + if (*uio & USBAT_UIO_UI0) { + usb_stor_dbg(us, "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(struct us_data *us, + unsigned char *uio) +{ + if (*uio & USBAT_UIO_0) { + usb_stor_dbg(us, "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 existence */ + rc = usbat_flash_check_media_present(us, 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(us, 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; + msleep(500); + + /* + * In attempt to distinguish between HP CDRW's and Flash readers, we now + * execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash + * readers), this command should fail with error. On ATAPI devices (i.e. + * CDROM drives), it should succeed. + */ + rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + rc = usbat_get_status(us, &status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + /* Check for error bit, or if the command 'fell through' */ + if (status == 0xA1 || !(status & 0x01)) { + /* Device is HP 8200 */ + usb_stor_dbg(us, "Detected HP8200 CDRW\n"); + info->devicetype = USBAT_DEV_HP8200; + } else { + /* Device is a CompactFlash reader/writer */ + usb_stor_dbg(us, "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 devicetype) +{ + + if (!info->devicetype) + info->devicetype = devicetype; + + if (!info->devicetype) + usbat_identify_device(us, info); + + switch (info->devicetype) { + default: + return USB_STOR_TRANSPORT_ERROR; + + case USBAT_DEV_HP8200: + us->transport = usbat_hp8200e_transport; + break; + + case USBAT_DEV_FLASH: + us->transport = usbat_flash_transport; + break; + } + + 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; + + /* ATA command : IDENTIFY DEVICE */ + rc = usbat_multiple_write(us, registers, command, 3); + if (rc != USB_STOR_XFER_GOOD) { + usb_stor_dbg(us, "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, 0); + 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_offset = 0; + struct scatterlist *sg = NULL; + + 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; + + /* ATA command 0x20 (READ SECTORS) */ + usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20); + + /* Write/execute ATA 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, 0); + if (result != USB_STOR_TRANSPORT_GOOD) + goto leave; + + usb_stor_dbg(us, "%d bytes\n", len); + + /* Store the data in the transfer buffer */ + usb_stor_access_xfer_buf(buffer, len, us->srb, + &sg, &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_offset = 0; + struct scatterlist *sg = NULL; + + 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 the device + * supports beyond 24-bit addressing. It's kind of hard to test + * since it requires > 8GB media. + */ + + 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, &sg_offset, FROM_XFER_BUF); + + /* ATA command 0x30 (WRITE SECTORS) */ + usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30); + + /* Write/execute ATA 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, 0); + 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_offset = 0; + struct scatterlist *sg = NULL; + + usb_stor_dbg(us, "transfersize %d\n", srb->transfersize); + + if (scsi_bufflen(srb) < 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, + scsi_sglist(srb), + scsi_bufflen(srb), scsi_sg_count(srb), 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]; + usb_stor_dbg(us, "GPCMD_READ_CD: len %d\n", len); + srb->transfersize = scsi_bufflen(srb)/len; + } + + if (!srb->transfersize) { + srb->transfersize = 2048; /* A guess */ + usb_stor_dbg(us, "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; + usb_stor_dbg(us, "Max read is %d bytes\n", len); + len = min(len, scsi_bufflen(srb)); + 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; + + while (transferred != scsi_bufflen(srb)) { + + if (len > scsi_bufflen(srb) - transferred) + len = scsi_bufflen(srb) - 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, &sg_offset, TO_XFER_BUF); + + /* Update the amount transferred and the sector number */ + + transferred += len; + sector += len / srb->transfersize; + + } /* while transferred != scsi_bufflen(srb) */ + + kfree(buffer); + return result; +} + +static int usbat_select_and_test_registers(struct us_data *us) +{ + int selector; + unsigned char *status = us->iobuf; + + /* try device = master, then device = slave. */ + for (selector = 0xA0; selector <= 0xB0; selector += 0x10) { + if (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 + */ +static int init_usbat(struct us_data *us, int devicetype) +{ + 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 = kzalloc(sizeof(struct usbat_info), GFP_NOIO); + if (!us->extra) + return 1; + + 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; + + usb_stor_dbg(us, "INIT 1\n"); + + msleep(2000); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + usb_stor_dbg(us, "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; + + usb_stor_dbg(us, "INIT 3\n"); + + rc = usbat_select_and_test_registers(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + usb_stor_dbg(us, "INIT 4\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + usb_stor_dbg(us, "INIT 5\n"); + + /* Enable peripheral control signals and card detect */ + rc = usbat_device_enable_cdt(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + usb_stor_dbg(us, "INIT 6\n"); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + usb_stor_dbg(us, "INIT 7\n"); + + msleep(1400); + + rc = usbat_read_user_io(us, status); + if (rc != USB_STOR_XFER_GOOD) + return USB_STOR_TRANSPORT_ERROR; + + usb_stor_dbg(us, "INIT 8\n"); + + rc = usbat_select_and_test_registers(us); + if (rc != USB_STOR_TRANSPORT_GOOD) + return rc; + + usb_stor_dbg(us, "INIT 9\n"); + + /* At this point, we need to detect which device we are using */ + if (usbat_set_transport(us, info, devicetype)) + return USB_STOR_TRANSPORT_ERROR; + + usb_stor_dbg(us, "INIT 10\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; + + usb_stor_dbg(us, "INIT 11\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; + + len = scsi_bufflen(srb); + + /* + * 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); + usb_stor_dbg(us, "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, + scsi_sglist(srb), + len, scsi_sg_count(srb), 10); + + if (result == USB_STOR_TRANSPORT_GOOD) { + transferred += len; + usb_stor_dbg(us, "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) { + usb_stor_dbg(us, "Error: len = %08X... what do I do now?\n", + len); + return USB_STOR_TRANSPORT_ERROR; + } + + result = usbat_multiple_write(us, registers, data, 7); + + if (result != 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!!! + */ + + result = usbat_write_block(us, USBAT_ATA, srb->cmnd, 12, + srb->cmnd[0] == GPCMD_BLANK ? 75 : 10, 0); + + if (result != 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, scsi_sglist(srb), len, + scsi_sg_count(srb)); + } + + 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) { + usb_stor_dbg(us, "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; + + /* hard coded 512 byte sectors as per ATA spec */ + info->ssize = 0x200; + usb_stor_dbg(us, "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) { + usb_stor_dbg(us, "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])); + + usb_stor_dbg(us, "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])); + + usb_stor_dbg(us, "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])); + + usb_stor_dbg(us, "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])); + + usb_stor_dbg(us, "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) { + usb_stor_dbg(us, "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) { + usb_stor_dbg(us, "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; + } + + usb_stor_dbg(us, "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; +} + +static int init_usbat_cd(struct us_data *us) +{ + return init_usbat(us, USBAT_DEV_HP8200); +} + +static int init_usbat_flash(struct us_data *us) +{ + return init_usbat(us, USBAT_DEV_FLASH); +} + +static struct scsi_host_template usbat_host_template; + +static int usbat_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct us_data *us; + int result; + + result = usb_stor_probe1(&us, intf, id, + (id - usbat_usb_ids) + usbat_unusual_dev_list, + &usbat_host_template); + if (result) + return result; + + /* + * The actual transport will be determined later by the + * initialization routine; this is just a placeholder. + */ + us->transport_name = "Shuttle USBAT"; + us->transport = usbat_flash_transport; + us->transport_reset = usb_stor_CB_reset; + us->max_lun = 0; + + result = usb_stor_probe2(us); + return result; +} + +static struct usb_driver usbat_driver = { + .name = DRV_NAME, + .probe = usbat_probe, + .disconnect = usb_stor_disconnect, + .suspend = usb_stor_suspend, + .resume = usb_stor_resume, + .reset_resume = usb_stor_reset_resume, + .pre_reset = usb_stor_pre_reset, + .post_reset = usb_stor_post_reset, + .id_table = usbat_usb_ids, + .soft_unbind = 1, + .no_dynamic_id = 1, +}; + +module_usb_stor_driver(usbat_driver, usbat_host_template, DRV_NAME); |