/* Driver for Lexar "Jumpshot" Compact Flash reader
*
* $Id: jumpshot.c,v 1.7 2002/02/25 00:40:13 mdharm Exp $
*
* jumpshot driver v0.1:
*
* First release
*
* Current development and maintenance by:
* (c) 2000 Jimmie Mayfield (mayfield+usb@sackheads.org)
*
* Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
* which I used as a template for this driver.
*
* Some bugfixes and scatter-gather code by Gregory P. Smith
* (greg-usb@electricrain.com)
*
* Fix for media change by Joerg Schneider (js@joergschneider.com)
*
* Developed with the assistance of:
*
* (C) 2002 Alan Stern <stern@rowland.org>
*
* 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.
*/
/*
* This driver attempts to support the Lexar Jumpshot USB CompactFlash
* reader. Like many other USB CompactFlash readers, the Jumpshot contains
* a USB-to-ATA chip.
*
* This driver supports reading and writing. If you're truly paranoid,
* however, you can force the driver into a write-protected state by setting
* the WP enable bits in jumpshot_handle_mode_sense. Basically this means
* setting mode_param_header[3] = 0x80.
*/
#include "transport.h"
#include "raw_bulk.h"
#include "protocol.h"
#include "usb.h"
#include "debug.h"
#include "jumpshot.h"
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/slab.h>
static inline int jumpshot_bulk_read(struct us_data *us,
unsigned char *data,
unsigned int len)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
US_DEBUGP("jumpshot_bulk_read: len = %d\n", len);
return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
data, len, NULL);
}
static inline int jumpshot_bulk_write(struct us_data *us,
unsigned char *data,
unsigned int len)
{
if (len == 0)
return USB_STOR_XFER_GOOD;
US_DEBUGP("jumpshot_bulk_write: len = %d\n", len);
return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
data, len, NULL);
}
static int jumpshot_get_status(struct us_data *us)
{
int rc;
if (!us)
return USB_STOR_TRANSPORT_ERROR;
// send the setup
rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
0, 0xA0, 0, 7, us->iobuf, 1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (us->iobuf[0] != 0x50) {
US_DEBUGP("jumpshot_get_status: 0x%2x\n",
us->iobuf[0]);
return USB_STOR_TRANSPORT_ERROR;
}
return USB_STOR_TRANSPORT_GOOD;
}
static int jumpshot_read_data(struct us_data *us,
struct jumpshot_info *info,
u32 sector,
u32 sectors,
unsigned char *dest,
int use_sg)
{
unsigned char *command = us->iobuf;
unsigned char *buffer = NULL;
unsigned char *ptr;
unsigned char thistime;
int totallen, len, result;
int sg_idx = 0, current_sg_offset = 0;
// 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;
do {
// loop, never allocate or transfer more than 64k at once
// (min(128k, 255*info->ssize) is the real limit)
len = min_t(int, totallen, 65536);
if (use_sg) {
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
ptr = buffer;
} else {
ptr = dest;
}
thistime = (len / info->ssize) & 0xff;
command[0] = 0;
command[1] = thistime;
command[2] = sector & 0xFF;
command[3] = (sector >> 8) & 0xFF;
command[4] = (sector >> 16) & 0xFF;
command[5] = 0xE0 | ((sector >> 24) & 0x0F);
command[6] = 0x20;
// send the setup + command
result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
0, 0x20, 0, 1, command, 7);
if (result != USB_STOR_XFER_GOOD)
goto leave;
// read the result
result = jumpshot_bulk_read(us, ptr, len);
if (result != USB_STOR_XFER_GOOD)
goto leave;
US_DEBUGP("jumpshot_read_data: %d bytes\n", len);
sectors -= thistime;
sector += thistime;
if (use_sg) {
us_copy_to_sgbuf(buffer, len, dest,
&sg_idx, ¤t_sg_offset, use_sg);
kfree(buffer);
} else {
dest += len;
}
totallen -= len;
} while (totallen > 0);
return USB_STOR_TRANSPORT_GOOD;
leave:
if (use_sg)
kfree(buffer);
return USB_STOR_TRANSPORT_ERROR;
}
static int jumpshot_write_data(struct us_data *us,
struct jumpshot_info *info,
u32 sector,
u32 sectors,
unsigned char *src,
int use_sg)
{
unsigned char *command = us->iobuf;
unsigned char *buffer = NULL;
unsigned char *ptr;
unsigned char thistime;
int totallen, len, result, waitcount;
int sg_idx = 0, sg_offset = 0;
// 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;
do {
// loop, never allocate or transfer more than 64k at once
// (min(128k, 255*info->ssize) is the real limit)
len = min_t(int, totallen, 65536);
// if we are using scatter-gather,
// first copy all to one big buffer
buffer = us_copy_from_sgbuf(src, len, &sg_idx,
&sg_offset, use_sg);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
ptr = buffer;
thistime = (len / info->ssize) & 0xff;
command[0] = 0;
command[1] = thistime;
command[2] = sector & 0xFF;
command[3] = (sector >> 8) & 0xFF;
command[4] = (sector >> 16) & 0xFF;
command[5] = 0xE0 | ((sector >> 24) & 0x0F);
command[6] = 0x30;
// send the setup + command
result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
0, 0x20, 0, 1, command, 7);
if (result != USB_STOR_XFER_GOOD)
goto leave;
// send the data
result = jumpshot_bulk_write(us, ptr, len);
if (result != USB_STOR_XFER_GOOD)
goto leave;
// read the result. apparently the bulk write can complete
// before the jumpshot drive is finished writing. so we loop
// here until we get a good return code
waitcount = 0;
do {
result = jumpshot_get_status(us);
if (result != USB_STOR_TRANSPORT_GOOD) {
// I have not experimented to find the smallest value.
//
wait_ms(50);
}
} while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
if (result != USB_STOR_TRANSPORT_GOOD)
US_DEBUGP("jumpshot_write_data: Gah! Waitcount = 10. Bad write!?\n");
sectors -= thistime;
sector += thistime;
if (use_sg)
kfree(buffer);
else
src += len;
totallen -= len;
} while (totallen > 0);
return result;
leave:
if (use_sg)
kfree(buffer);
return USB_STOR_TRANSPORT_ERROR;
}
static int jumpshot_id_device(struct us_data *us,
struct jumpshot_info *info)
{
unsigned char *command = us->iobuf;
unsigned char *reply;
int rc;
if (!us || !info)
return USB_STOR_TRANSPORT_ERROR;
command[0] = 0xE0;
command[1] = 0xEC;
reply = kmalloc(512, GFP_NOIO);
if (!reply)
return USB_STOR_TRANSPORT_ERROR;
// send the setup
rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
0, 0x20, 0, 6, command, 2);
if (rc != USB_STOR_XFER_GOOD) {
US_DEBUGP("jumpshot_id_device: Gah! "
"send_control for read_capacity failed\n");
rc = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
// read the reply
rc = jumpshot_bulk_read(us, reply, 512);
if (rc != USB_STOR_XFER_GOOD) {
rc = USB_STOR_TRANSPORT_ERROR;
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;
}
static int jumpshot_handle_mode_sense(struct us_data *us,
Scsi_Cmnd * srb,
unsigned char *ptr,
int sense_6)
{
unsigned char mode_param_header[8] = {
0, 0, 0, 0, 0, 0, 0, 0
};
unsigned char rw_err_page[12] = {
0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
};
unsigned char cache_page[12] = {
0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
unsigned char rbac_page[12] = {
0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
};
unsigned char timer_page[8] = {
0x1C, 0x6, 0, 0, 0, 0
};
unsigned char pc, page_code;
unsigned short total_len = 0;
unsigned short param_len, i = 0;
if (sense_6)
param_len = srb->cmnd[4];
else
param_len = ((u32) (srb->cmnd[7]) >> 8) | ((u32) (srb->cmnd[8]));
pc = srb->cmnd[2] >> 6;
page_code = srb->cmnd[2] & 0x3F;
switch (pc) {
case 0x0:
US_DEBUGP("jumpshot_handle_mode_sense: Current values\n");
break;
case 0x1:
US_DEBUGP("jumpshot_handle_mode_sense: Changeable values\n");
break;
case 0x2:
US_DEBUGP("jumpshot_handle_mode_sense: Default values\n");
break;
case 0x3:
US_DEBUGP("jumpshot_handle_mode_sense: Saves values\n");
break;
}
mode_param_header[3] = 0x80; // write enable
switch (page_code) {
case 0x0:
// vendor-specific mode
return USB_STOR_TRANSPORT_ERROR;
case 0x1:
total_len = sizeof(rw_err_page);
mode_param_header[0] = total_len >> 8;
mode_param_header[1] = total_len & 0xFF;
mode_param_header[3] = 0x00; // WP enable: 0x80
memcpy(ptr, mode_param_header, sizeof(mode_param_header));
i += sizeof(mode_param_header);
memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
break;
case 0x8:
total_len = sizeof(cache_page);
mode_param_header[0] = total_len >> 8;
mode_param_header[1] = total_len & 0xFF;
mode_param_header[3] = 0x00; // WP enable: 0x80
memcpy(ptr, mode_param_header, sizeof(mode_param_header));
i += sizeof(mode_param_header);
memcpy(ptr + i, cache_page, sizeof(cache_page));
break;
case 0x1B:
total_len = sizeof(rbac_page);
mode_param_header[0] = total_len >> 8;
mode_param_header[1] = total_len & 0xFF;
mode_param_header[3] = 0x00; // WP enable: 0x80
memcpy(ptr, mode_param_header, sizeof(mode_param_header));
i += sizeof(mode_param_header);
memcpy(ptr + i, rbac_page, sizeof(rbac_page));
break;
case 0x1C:
total_len = sizeof(timer_page);
mode_param_header[0] = total_len >> 8;
mode_param_header[1] = total_len & 0xFF;
mode_param_header[3] = 0x00; // WP enable: 0x80
memcpy(ptr, mode_param_header, sizeof(mode_param_header));
i += sizeof(mode_param_header);
memcpy(ptr + i, timer_page, sizeof(timer_page));
break;
case 0x3F:
total_len = sizeof(timer_page) + sizeof(rbac_page) +
sizeof(cache_page) + sizeof(rw_err_page);
mode_param_header[0] = total_len >> 8;
mode_param_header[1] = total_len & 0xFF;
mode_param_header[3] = 0x00; // WP enable: 0x80
memcpy(ptr, mode_param_header, sizeof(mode_param_header));
i += sizeof(mode_param_header);
memcpy(ptr + i, timer_page, sizeof(timer_page));
i += sizeof(timer_page);
memcpy(ptr + i, rbac_page, sizeof(rbac_page));
i += sizeof(rbac_page);
memcpy(ptr + i, cache_page, sizeof(cache_page));
i += sizeof(cache_page);
memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
break;
}
return USB_STOR_TRANSPORT_GOOD;
}
void jumpshot_info_destructor(void *extra)
{
// this routine is a placeholder...
// currently, we don't allocate any extra blocks so we're okay
}
// Transport for the Lexar 'Jumpshot'
//
int jumpshot_transport(Scsi_Cmnd * srb, struct us_data *us)
{
struct jumpshot_info *info;
int rc;
unsigned long block, blocks;
unsigned char *ptr = NULL;
unsigned char inquiry_response[36] = {
0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
};
if (!us->extra) {
us->extra = kmalloc(sizeof(struct jumpshot_info), GFP_NOIO);
if (!us->extra) {
US_DEBUGP("jumpshot_transport: Gah! Can't allocate storage for jumpshot info struct!\n");
return USB_STOR_TRANSPORT_ERROR;
}
memset(us->extra, 0, sizeof(struct jumpshot_info));
us->extra_destructor = jumpshot_info_destructor;
}
info = (struct jumpshot_info *) (us->extra);
ptr = (unsigned char *) srb->request_buffer;
if (srb->cmnd[0] == INQUIRY) {
US_DEBUGP("jumpshot_transport: INQUIRY. Returning bogus response.\n");
memset(inquiry_response + 8, 0, 28);
fill_inquiry_response(us, inquiry_response, 36);
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == READ_CAPACITY) {
info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
rc = jumpshot_get_status(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
rc = jumpshot_id_device(us, info);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("jumpshot_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
info->sectors, info->ssize);
// build the reply
//
ptr[0] = (info->sectors >> 24) & 0xFF;
ptr[1] = (info->sectors >> 16) & 0xFF;
ptr[2] = (info->sectors >> 8) & 0xFF;
ptr[3] = (info->sectors) & 0xFF;
ptr[4] = (info->ssize >> 24) & 0xFF;
ptr[5] = (info->ssize >> 16) & 0xFF;
ptr[6] = (info->ssize >> 8) & 0xFF;
ptr[7] = (info->ssize) & 0xFF;
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == MODE_SELECT_10) {
US_DEBUGP("jumpshot_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("jumpshot_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
return jumpshot_read_data(us, info, block, blocks, ptr, srb->use_sg);
}
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("jumpshot_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
return jumpshot_read_data(us, info, block, blocks, ptr, srb->use_sg);
}
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("jumpshot_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
return jumpshot_write_data(us, info, block, blocks, ptr, srb->use_sg);
}
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("jumpshot_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
return jumpshot_write_data(us, info, block, blocks, ptr, srb->use_sg);
}
if (srb->cmnd[0] == TEST_UNIT_READY) {
US_DEBUGP("jumpshot_transport: TEST_UNIT_READY.\n");
return jumpshot_get_status(us);
}
if (srb->cmnd[0] == REQUEST_SENSE) {
US_DEBUGP("jumpshot_transport: REQUEST_SENSE. Returning NO SENSE for now\n");
ptr[0] = 0xF0;
ptr[2] = info->sense_key;
ptr[7] = 11;
ptr[12] = info->sense_asc;
ptr[13] = info->sense_ascq;
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == MODE_SENSE) {
US_DEBUGP("jumpshot_transport: MODE_SENSE_6 detected\n");
return jumpshot_handle_mode_sense(us, srb, ptr, TRUE);
}
if (srb->cmnd[0] == MODE_SENSE_10) {
US_DEBUGP("jumpshot_transport: MODE_SENSE_10 detected\n");
return jumpshot_handle_mode_sense(us, srb, ptr, FALSE);
}
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;
}
if (srb->cmnd[0] == START_STOP) {
/* this is used by sd.c'check_scsidisk_media_change to detect
media change */
US_DEBUGP("jumpshot_transport: START_STOP.\n");
/* the first jumpshot_id_device after a media change returns
an error (determined experimentally) */
rc = jumpshot_id_device(us, info);
if (rc == USB_STOR_TRANSPORT_GOOD) {
info->sense_key = NO_SENSE;
srb->result = SUCCESS;
} else {
info->sense_key = UNIT_ATTENTION;
srb->result = SAM_STAT_CHECK_CONDITION;
}
return rc;
}
US_DEBUGP("jumpshot_transport: Gah! Unknown command: %d (0x%x)\n",
srb->cmnd[0], srb->cmnd[0]);
return USB_STOR_TRANSPORT_ERROR;
}
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