Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 488 insertions, 0 deletions

diff --git a/drivers/usb/storage/freecom.c b/drivers/usb/storage/freecom.c
new file mode 100644
index 000000000000..30e96050fe0c
--- /dev/null
+++ b/drivers/usb/storage/freecom.c
@@ -0,0 +1,488 @@
+/* Driver for Freecom USB/IDE adaptor
+ *
+ * $Id: freecom.c,v 1.22 2002/04/22 03:39:43 mdharm Exp $
+ *
+ * Freecom v0.1:
+ *
+ * First release
+ *
+ * Current development and maintenance by:
+ *   (C) 2000 David Brown <usb-storage@davidb.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 was developed with information provided in FREECOM's USB
+ * Programmers Reference Guide.  For further information contact Freecom
+ * (http://www.freecom.de/)
+ */
+
+#include <linux/config.h>
+#include <linux/hdreg.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "debug.h"
+#include "freecom.h"
+
+#ifdef CONFIG_USB_STORAGE_DEBUG
+static void pdump (void *, int);
+#endif
+
+/* Bits of HD_STATUS */
+#define ERR_STAT                0x01
+#define DRQ_STAT                0x08
+
+/* All of the outgoing packets are 64 bytes long. */
+struct freecom_cb_wrap {
+        u8    Type;             /* Command type. */
+        u8    Timeout;          /* Timeout in seconds. */
+        u8    Atapi[12];        /* An ATAPI packet. */
+        u8    Filler[50];       /* Padding Data. */
+};
+
+struct freecom_xfer_wrap {
+        u8    Type;             /* Command type. */
+        u8    Timeout;          /* Timeout in seconds. */
+        __le32   Count;         /* Number of bytes to transfer. */
+        u8    Pad[58];
+} __attribute__ ((packed));
+
+struct freecom_ide_out {
+        u8    Type;             /* Type + IDE register. */
+        u8    Pad;
+        __le16   Value;         /* Value to write. */
+        u8    Pad2[60];
+};
+
+struct freecom_ide_in {
+        u8    Type;             /* Type | IDE register. */
+        u8    Pad[63];
+};
+
+struct freecom_status {
+        u8    Status;
+        u8    Reason;
+        __le16   Count;
+        u8    Pad[60];
+};
+
+/* Freecom stuffs the interrupt status in the INDEX_STAT bit of the ide
+ * register. */
+#define FCM_INT_STATUS          0x02 /* INDEX_STAT */
+#define FCM_STATUS_BUSY         0x80
+
+/* These are the packet types.  The low bit indicates that this command
+ * should wait for an interrupt. */
+#define FCM_PACKET_ATAPI        0x21
+#define FCM_PACKET_STATUS       0x20
+
+/* Receive data from the IDE interface.  The ATAPI packet has already
+ * waited, so the data should be immediately available. */
+#define FCM_PACKET_INPUT        0x81
+
+/* Send data to the IDE interface. */
+#define FCM_PACKET_OUTPUT       0x01
+
+/* Write a value to an ide register.  Or the ide register to write after
+ * munging the address a bit. */
+#define FCM_PACKET_IDE_WRITE    0x40
+#define FCM_PACKET_IDE_READ     0xC0
+
+/* All packets (except for status) are 64 bytes long. */
+#define FCM_PACKET_LENGTH               64
+#define FCM_STATUS_PACKET_LENGTH        4
+
+static int
+freecom_readdata (struct scsi_cmnd *srb, struct us_data *us,
+                unsigned int ipipe, unsigned int opipe, int count)
+{
+        struct freecom_xfer_wrap *fxfr =
+                (struct freecom_xfer_wrap *) us->iobuf;
+        int result;
+
+        fxfr->Type = FCM_PACKET_INPUT | 0x00;
+        fxfr->Timeout = 0;    /* Short timeout for debugging. */
+        fxfr->Count = cpu_to_le32 (count);
+        memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
+
+        US_DEBUGP("Read data Freecom! (c=%d)\n", count);
+
+        /* Issue the transfer command. */
+        result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
+                        FCM_PACKET_LENGTH, NULL);
+        if (result != USB_STOR_XFER_GOOD) {
+                US_DEBUGP ("Freecom readdata transport error\n");
+                return USB_STOR_TRANSPORT_ERROR;
+        }
+
+        /* Now transfer all of our blocks. */
+        US_DEBUGP("Start of read\n");
+        result = usb_stor_bulk_transfer_sg(us, ipipe, srb->request_buffer,
+                        count, srb->use_sg, &srb->resid);
+        US_DEBUGP("freecom_readdata done!\n");
+
+        if (result > USB_STOR_XFER_SHORT)
+                return USB_STOR_TRANSPORT_ERROR;
+        return USB_STOR_TRANSPORT_GOOD;
+}
+
+static int
+freecom_writedata (struct scsi_cmnd *srb, struct us_data *us,
+                int unsigned ipipe, unsigned int opipe, int count)
+{
+        struct freecom_xfer_wrap *fxfr =
+                (struct freecom_xfer_wrap *) us->iobuf;
+        int result;
+
+        fxfr->Type = FCM_PACKET_OUTPUT | 0x00;
+        fxfr->Timeout = 0;    /* Short timeout for debugging. */
+        fxfr->Count = cpu_to_le32 (count);
+        memset (fxfr->Pad, 0, sizeof (fxfr->Pad));
+
+        US_DEBUGP("Write data Freecom! (c=%d)\n", count);
+
+        /* Issue the transfer command. */
+        result = usb_stor_bulk_transfer_buf (us, opipe, fxfr,
+                        FCM_PACKET_LENGTH, NULL);
+        if (result != USB_STOR_XFER_GOOD) {
+                US_DEBUGP ("Freecom writedata transport error\n");
+                return USB_STOR_TRANSPORT_ERROR;
+        }
+
+        /* Now transfer all of our blocks. */
+        US_DEBUGP("Start of write\n");
+        result = usb_stor_bulk_transfer_sg(us, opipe, srb->request_buffer,
+                        count, srb->use_sg, &srb->resid);
+
+        US_DEBUGP("freecom_writedata done!\n");
+        if (result > USB_STOR_XFER_SHORT)
+                return USB_STOR_TRANSPORT_ERROR;
+        return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Transport for the Freecom USB/IDE adaptor.
+ *
+ */
+int freecom_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+        struct freecom_cb_wrap *fcb;
+        struct freecom_status  *fst;
+        unsigned int ipipe, opipe;              /* We need both pipes. */
+        int result;
+        unsigned int partial;
+        int length;
+
+        fcb = (struct freecom_cb_wrap *) us->iobuf;
+        fst = (struct freecom_status *) us->iobuf;
+
+        US_DEBUGP("Freecom TRANSPORT STARTED\n");
+
+        /* Get handles for both transports. */
+        opipe = us->send_bulk_pipe;
+        ipipe = us->recv_bulk_pipe;
+
+        /* The ATAPI Command always goes out first. */
+        fcb->Type = FCM_PACKET_ATAPI | 0x00;
+        fcb->Timeout = 0;
+        memcpy (fcb->Atapi, srb->cmnd, 12);
+        memset (fcb->Filler, 0, sizeof (fcb->Filler));
+
+        US_DEBUG(pdump (srb->cmnd, 12));
+
+        /* Send it out. */
+        result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
+                        FCM_PACKET_LENGTH, NULL);
+
+        /* The Freecom device will only fail if there is something wrong in
+         * USB land.  It returns the status in its own registers, which
+         * come back in the bulk pipe. */
+        if (result != USB_STOR_XFER_GOOD) {
+                US_DEBUGP ("freecom transport error\n");
+                return USB_STOR_TRANSPORT_ERROR;
+        }
+
+        /* There are times we can optimize out this status read, but it
+         * doesn't hurt us to always do it now. */
+        result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
+                        FCM_STATUS_PACKET_LENGTH, &partial);
+        US_DEBUGP("foo Status result %d %u\n", result, partial);
+        if (result != USB_STOR_XFER_GOOD)
+                return USB_STOR_TRANSPORT_ERROR;
+
+        US_DEBUG(pdump ((void *) fst, partial));
+
+        /* The firmware will time-out commands after 20 seconds. Some commands
+         * can legitimately take longer than this, so we use a different
+         * command that only waits for the interrupt and then sends status,
+         * without having to send a new ATAPI command to the device. 
+         *
+         * NOTE: There is some indication that a data transfer after a timeout
+         * may not work, but that is a condition that should never happen.
+         */
+        while (fst->Status & FCM_STATUS_BUSY) {
+                US_DEBUGP("20 second USB/ATAPI bridge TIMEOUT occurred!\n");
+                US_DEBUGP("fst->Status is %x\n", fst->Status);
+
+                /* Get the status again */
+                fcb->Type = FCM_PACKET_STATUS;
+                fcb->Timeout = 0;
+                memset (fcb->Atapi, 0, sizeof(fcb->Atapi));
+                memset (fcb->Filler, 0, sizeof (fcb->Filler));
+
+                /* Send it out. */
+                result = usb_stor_bulk_transfer_buf (us, opipe, fcb,
+                                FCM_PACKET_LENGTH, NULL);
+
+                /* The Freecom device will only fail if there is something
+                 * wrong in USB land.  It returns the status in its own
+                 * registers, which come back in the bulk pipe.
+                 */
+                if (result != USB_STOR_XFER_GOOD) {
+                        US_DEBUGP ("freecom transport error\n");
+                        return USB_STOR_TRANSPORT_ERROR;
+                }
+
+                /* get the data */
+                result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
+                                FCM_STATUS_PACKET_LENGTH, &partial);
+
+                US_DEBUGP("bar Status result %d %u\n", result, partial);
+                if (result != USB_STOR_XFER_GOOD)
+                        return USB_STOR_TRANSPORT_ERROR;
+
+                US_DEBUG(pdump ((void *) fst, partial));
+        }
+
+        if (partial != 4)
+                return USB_STOR_TRANSPORT_ERROR;
+        if ((fst->Status & 1) != 0) {
+                US_DEBUGP("operation failed\n");
+                return USB_STOR_TRANSPORT_FAILED;
+        }
+
+        /* The device might not have as much data available as we
+         * requested.  If you ask for more than the device has, this reads
+         * and such will hang. */
+        US_DEBUGP("Device indicates that it has %d bytes available\n",
+                        le16_to_cpu (fst->Count));
+        US_DEBUGP("SCSI requested %d\n", srb->request_bufflen);
+
+        /* Find the length we desire to read. */
+        switch (srb->cmnd[0]) {
+                case INQUIRY:
+                case REQUEST_SENSE:             /* 16 or 18 bytes? spec says 18, lots of devices only have 16 */
+                case MODE_SENSE:
+                case MODE_SENSE_10:
+                        length = le16_to_cpu(fst->Count);
+                        break;
+                default:
+                        length = srb->request_bufflen;
+        }
+
+        /* verify that this amount is legal */
+        if (length > srb->request_bufflen) {
+                length = srb->request_bufflen;
+                US_DEBUGP("Truncating request to match buffer length: %d\n", length);
+        }
+
+        /* What we do now depends on what direction the data is supposed to
+         * move in. */
+
+        switch (us->srb->sc_data_direction) {
+        case DMA_FROM_DEVICE:
+                /* catch bogus "read 0 length" case */
+                if (!length)
+                        break;
+                /* Make sure that the status indicates that the device
+                 * wants data as well. */
+                if ((fst->Status & DRQ_STAT) == 0 || (fst->Reason & 3) != 2) {
+                        US_DEBUGP("SCSI wants data, drive doesn't have any\n");
+                        return USB_STOR_TRANSPORT_FAILED;
+                }
+                result = freecom_readdata (srb, us, ipipe, opipe, length);
+                if (result != USB_STOR_TRANSPORT_GOOD)
+                        return result;
+
+                US_DEBUGP("FCM: Waiting for status\n");
+                result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
+                                FCM_PACKET_LENGTH, &partial);
+                US_DEBUG(pdump ((void *) fst, partial));
+
+                if (partial != 4 || result > USB_STOR_XFER_SHORT)
+                        return USB_STOR_TRANSPORT_ERROR;
+                if ((fst->Status & ERR_STAT) != 0) {
+                        US_DEBUGP("operation failed\n");
+                        return USB_STOR_TRANSPORT_FAILED;
+                }
+                if ((fst->Reason & 3) != 3) {
+                        US_DEBUGP("Drive seems still hungry\n");
+                        return USB_STOR_TRANSPORT_FAILED;
+                }
+                US_DEBUGP("Transfer happy\n");
+                break;
+
+        case DMA_TO_DEVICE:
+                /* catch bogus "write 0 length" case */
+                if (!length)
+                        break;
+                /* Make sure the status indicates that the device wants to
+                 * send us data. */
+                /* !!IMPLEMENT!! */
+                result = freecom_writedata (srb, us, ipipe, opipe, length);
+                if (result != USB_STOR_TRANSPORT_GOOD)
+                        return result;
+
+                US_DEBUGP("FCM: Waiting for status\n");
+                result = usb_stor_bulk_transfer_buf (us, ipipe, fst,
+                                FCM_PACKET_LENGTH, &partial);
+
+                if (partial != 4 || result > USB_STOR_XFER_SHORT)
+                        return USB_STOR_TRANSPORT_ERROR;
+                if ((fst->Status & ERR_STAT) != 0) {
+                        US_DEBUGP("operation failed\n");
+                        return USB_STOR_TRANSPORT_FAILED;
+                }
+                if ((fst->Reason & 3) != 3) {
+                        US_DEBUGP("Drive seems still hungry\n");
+                        return USB_STOR_TRANSPORT_FAILED;
+                }
+
+                US_DEBUGP("Transfer happy\n");
+                break;
+
+
+        case DMA_NONE:
+                /* Easy, do nothing. */
+                break;
+
+        default:
+                /* should never hit here -- filtered in usb.c */
+                US_DEBUGP ("freecom unimplemented direction: %d\n",
+                                us->srb->sc_data_direction);
+                // Return fail, SCSI seems to handle this better.
+                return USB_STOR_TRANSPORT_FAILED;
+                break;
+        }
+
+        return USB_STOR_TRANSPORT_GOOD;
+}
+
+int
+freecom_init (struct us_data *us)
+{
+        int result;
+        char *buffer = us->iobuf;
+
+        /* The DMA-mapped I/O buffer is 64 bytes long, just right for
+         * all our packets.  No need to allocate any extra buffer space.
+         */
+
+        result = usb_stor_control_msg(us, us->recv_ctrl_pipe,
+                        0x4c, 0xc0, 0x4346, 0x0, buffer, 0x20, 3*HZ);
+        buffer[32] = '\0';
+        US_DEBUGP("String returned from FC init is: %s\n", buffer);
+
+        /* Special thanks to the people at Freecom for providing me with
+         * this "magic sequence", which they use in their Windows and MacOS
+         * drivers to make sure that all the attached perhiperals are
+         * properly reset.
+         */
+
+        /* send reset */
+        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
+                        0x4d, 0x40, 0x24d8, 0x0, NULL, 0x0, 3*HZ);
+        US_DEBUGP("result from activate reset is %d\n", result);
+
+        /* wait 250ms */
+        mdelay(250);
+
+        /* clear reset */
+        result = usb_stor_control_msg(us, us->send_ctrl_pipe,
+                        0x4d, 0x40, 0x24f8, 0x0, NULL, 0x0, 3*HZ);
+        US_DEBUGP("result from clear reset is %d\n", result);
+
+        /* wait 3 seconds */
+        mdelay(3 * 1000);
+
+        return USB_STOR_TRANSPORT_GOOD;
+}
+
+int usb_stor_freecom_reset(struct us_data *us)
+{
+        printk (KERN_CRIT "freecom reset called\n");
+
+        /* We don't really have this feature. */
+        return FAILED;
+}
+
+#ifdef CONFIG_USB_STORAGE_DEBUG
+static void pdump (void *ibuffer, int length)
+{
+        static char line[80];
+        int offset = 0;
+        unsigned char *buffer = (unsigned char *) ibuffer;
+        int i, j;
+        int from, base;
+
+        offset = 0;
+        for (i = 0; i < length; i++) {
+                if ((i & 15) == 0) {
+                        if (i > 0) {
+                                offset += sprintf (line+offset, " - ");
+                                for (j = i - 16; j < i; j++) {
+                                        if (buffer[j] >= 32 && buffer[j] <= 126)
+                                                line[offset++] = buffer[j];
+                                        else
+                                                line[offset++] = '.';
+                                }
+                                line[offset] = 0;
+                                US_DEBUGP("%s\n", line);
+                                offset = 0;
+                        }
+                        offset += sprintf (line+offset, "%08x:", i);
+                }
+                else if ((i & 7) == 0) {
+                        offset += sprintf (line+offset, " -");
+                }
+                offset += sprintf (line+offset, " %02x", buffer[i] & 0xff);
+        }
+
+        /* Add the last "chunk" of data. */
+        from = (length - 1) % 16;
+        base = ((length - 1) / 16) * 16;
+
+        for (i = from + 1; i < 16; i++)
+                offset += sprintf (line+offset, "   ");
+        if (from < 8)
+                offset += sprintf (line+offset, "  ");
+        offset += sprintf (line+offset, " - ");
+
+        for (i = 0; i <= from; i++) {
+                if (buffer[base+i] >= 32 && buffer[base+i] <= 126)
+                        line[offset++] = buffer[base+i];
+                else
+                        line[offset++] = '.';
+        }
+        line[offset] = 0;
+        US_DEBUGP("%s\n", line);
+        offset = 0;
+}
+#endif
+