diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/storage/jumpshot.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/usb/storage/jumpshot.c')
-rw-r--r-- | drivers/usb/storage/jumpshot.c | 596 |
1 files changed, 596 insertions, 0 deletions
diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c new file mode 100644 index 0000000..aff9d51 --- /dev/null +++ b/drivers/usb/storage/jumpshot.c @@ -0,0 +1,596 @@ +/* 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. See the comments + * in that routine. + */ + +#include <linux/sched.h> +#include <linux/errno.h> +#include <linux/slab.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> + +#include "usb.h" +#include "transport.h" +#include "protocol.h" +#include "debug.h" +#include "jumpshot.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 *command = us->iobuf; + unsigned char *buffer; + unsigned char thistime; + unsigned int totallen, alloclen; + int len, result; + unsigned 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; + + // 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; + + 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, buffer, len); + if (result != USB_STOR_XFER_GOOD) + goto leave; + + US_DEBUGP("jumpshot_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; +} + + +static int jumpshot_write_data(struct us_data *us, + struct jumpshot_info *info, + u32 sector, + u32 sectors) +{ + unsigned char *command = us->iobuf; + unsigned char *buffer; + unsigned char thistime; + unsigned int totallen, alloclen; + int len, result, waitcount; + unsigned 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; + + // 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); + + 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, buffer, 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. + // + msleep(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"); + + sector += thistime; + totallen -= len; + } while (totallen > 0); + + kfree(buffer); + return result; + + leave: + 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, + struct scsi_cmnd * srb, + int sense_6) +{ + static unsigned char rw_err_page[12] = { + 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0 + }; + static unsigned char cache_page[12] = { + 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0 + }; + static unsigned char rbac_page[12] = { + 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0 + }; + static unsigned char timer_page[8] = { + 0x1C, 0x6, 0, 0, 0, 0 + }; + unsigned char pc, page_code; + unsigned int i = 0; + struct jumpshot_info *info = (struct jumpshot_info *) (us->extra); + unsigned char *ptr = us->iobuf; + + 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; + } + + memset(ptr, 0, 8); + if (sense_6) { + ptr[2] = 0x00; // WP enable: 0x80 + i = 4; + } else { + ptr[3] = 0x00; // WP enable: 0x80 + i = 8; + } + + switch (page_code) { + case 0x0: + // vendor-specific mode + info->sense_key = 0x05; + info->sense_asc = 0x24; + info->sense_ascq = 0x00; + return USB_STOR_TRANSPORT_FAILED; + + case 0x1: + memcpy(ptr + i, rw_err_page, sizeof(rw_err_page)); + i += sizeof(rw_err_page); + break; + + case 0x8: + memcpy(ptr + i, cache_page, sizeof(cache_page)); + i += sizeof(cache_page); + break; + + case 0x1B: + memcpy(ptr + i, rbac_page, sizeof(rbac_page)); + i += sizeof(rbac_page); + break; + + case 0x1C: + memcpy(ptr + i, timer_page, sizeof(timer_page)); + i += sizeof(timer_page); + break; + + case 0x3F: + 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)); + i += sizeof(rw_err_page); + break; + } + + if (sense_6) + ptr[0] = i - 1; + else + ((__be16 *) ptr)[0] = cpu_to_be16(i - 2); + usb_stor_set_xfer_buf(ptr, i, srb); + + return USB_STOR_TRANSPORT_GOOD; +} + + +static 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(struct scsi_cmnd * srb, struct us_data *us) +{ + struct jumpshot_info *info; + int rc; + unsigned long block, blocks; + unsigned char *ptr = us->iobuf; + static unsigned char inquiry_response[8] = { + 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); + + if (srb->cmnd[0] == INQUIRY) { + US_DEBUGP("jumpshot_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) { + 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 + // + ((__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("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); + } + + 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); + } + + 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); + } + + 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); + } + + + 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.\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] == MODE_SENSE) { + US_DEBUGP("jumpshot_transport: MODE_SENSE_6 detected\n"); + return jumpshot_handle_mode_sense(us, srb, 1); + } + + if (srb->cmnd[0] == MODE_SENSE_10) { + US_DEBUGP("jumpshot_transport: MODE_SENSE_10 detected\n"); + return jumpshot_handle_mode_sense(us, srb, 0); + } + + 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]); + info->sense_key = 0x05; + info->sense_asc = 0x20; + info->sense_ascq = 0x00; + return USB_STOR_TRANSPORT_FAILED; +} |