forked from luck/tmp_suning_uos_patched
e73b2db6c9
Storage subdrivers, like alauda, datafab and others, don't support dynamic id currently, and it needs lots of work but with very little gain to enable the feature, so disable them in the patch. Signed-off-by: Huajun Li <huajun.li.lee@gmail.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
237 lines
5.9 KiB
C
237 lines
5.9 KiB
C
/* Driver for Rio Karma
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*
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* (c) 2006 Bob Copeland <me@bobcopeland.com>
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* (c) 2006 Keith Bennett <keith@mcs.st-and.ac.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include "usb.h"
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#include "transport.h"
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#include "debug.h"
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MODULE_DESCRIPTION("Driver for Rio Karma");
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MODULE_AUTHOR("Bob Copeland <me@bobcopeland.com>, Keith Bennett <keith@mcs.st-and.ac.uk>");
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MODULE_LICENSE("GPL");
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#define RIO_PREFIX "RIOP\x00"
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#define RIO_PREFIX_LEN 5
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#define RIO_SEND_LEN 40
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#define RIO_RECV_LEN 0x200
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#define RIO_ENTER_STORAGE 0x1
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#define RIO_LEAVE_STORAGE 0x2
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#define RIO_RESET 0xC
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struct karma_data {
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int in_storage;
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char *recv;
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};
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static int rio_karma_init(struct us_data *us);
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/*
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* The table of devices
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*/
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#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
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vendorName, productName, useProtocol, useTransport, \
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initFunction, flags) \
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{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
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.driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
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static struct usb_device_id karma_usb_ids[] = {
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# include "unusual_karma.h"
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, karma_usb_ids);
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#undef UNUSUAL_DEV
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/*
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* The flags table
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*/
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#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
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vendor_name, product_name, use_protocol, use_transport, \
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init_function, Flags) \
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{ \
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.vendorName = vendor_name, \
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.productName = product_name, \
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.useProtocol = use_protocol, \
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.useTransport = use_transport, \
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.initFunction = init_function, \
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}
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static struct us_unusual_dev karma_unusual_dev_list[] = {
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# include "unusual_karma.h"
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{ } /* Terminating entry */
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};
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#undef UNUSUAL_DEV
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/*
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* Send commands to Rio Karma.
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*
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* For each command we send 40 bytes starting 'RIOP\0' followed by
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* the command number and a sequence number, which the device will ack
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* with a 512-byte packet with the high four bits set and everything
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* else null. Then we send 'RIOP\x80' followed by a zero and the
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* sequence number, until byte 5 in the response repeats the sequence
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* number.
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*/
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static int rio_karma_send_command(char cmd, struct us_data *us)
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{
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int result, partial;
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unsigned long timeout;
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static unsigned char seq = 1;
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struct karma_data *data = (struct karma_data *) us->extra;
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US_DEBUGP("karma: sending command %04x\n", cmd);
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memset(us->iobuf, 0, RIO_SEND_LEN);
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memcpy(us->iobuf, RIO_PREFIX, RIO_PREFIX_LEN);
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us->iobuf[5] = cmd;
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us->iobuf[6] = seq;
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timeout = jiffies + msecs_to_jiffies(6000);
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for (;;) {
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result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
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us->iobuf, RIO_SEND_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto err;
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result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
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data->recv, RIO_RECV_LEN, &partial);
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if (result != USB_STOR_XFER_GOOD)
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goto err;
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if (data->recv[5] == seq)
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break;
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if (time_after(jiffies, timeout))
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goto err;
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us->iobuf[4] = 0x80;
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us->iobuf[5] = 0;
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msleep(50);
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}
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seq++;
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if (seq == 0)
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seq = 1;
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US_DEBUGP("karma: sent command %04x\n", cmd);
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return 0;
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err:
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US_DEBUGP("karma: command %04x failed\n", cmd);
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return USB_STOR_TRANSPORT_FAILED;
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}
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/*
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* Trap START_STOP and READ_10 to leave/re-enter storage mode.
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* Everything else is propagated to the normal bulk layer.
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*/
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static int rio_karma_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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int ret;
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struct karma_data *data = (struct karma_data *) us->extra;
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if (srb->cmnd[0] == READ_10 && !data->in_storage) {
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ret = rio_karma_send_command(RIO_ENTER_STORAGE, us);
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if (ret)
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return ret;
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data->in_storage = 1;
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return usb_stor_Bulk_transport(srb, us);
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} else if (srb->cmnd[0] == START_STOP) {
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ret = rio_karma_send_command(RIO_LEAVE_STORAGE, us);
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if (ret)
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return ret;
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data->in_storage = 0;
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return rio_karma_send_command(RIO_RESET, us);
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}
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return usb_stor_Bulk_transport(srb, us);
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}
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static void rio_karma_destructor(void *extra)
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{
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struct karma_data *data = (struct karma_data *) extra;
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kfree(data->recv);
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}
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static int rio_karma_init(struct us_data *us)
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{
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int ret = 0;
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struct karma_data *data = kzalloc(sizeof(struct karma_data), GFP_NOIO);
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if (!data)
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goto out;
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data->recv = kmalloc(RIO_RECV_LEN, GFP_NOIO);
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if (!data->recv) {
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kfree(data);
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goto out;
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}
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us->extra = data;
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us->extra_destructor = rio_karma_destructor;
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ret = rio_karma_send_command(RIO_ENTER_STORAGE, us);
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data->in_storage = (ret == 0);
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out:
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return ret;
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}
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static int karma_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct us_data *us;
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int result;
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result = usb_stor_probe1(&us, intf, id,
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(id - karma_usb_ids) + karma_unusual_dev_list);
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if (result)
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return result;
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us->transport_name = "Rio Karma/Bulk";
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us->transport = rio_karma_transport;
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us->transport_reset = usb_stor_Bulk_reset;
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result = usb_stor_probe2(us);
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return result;
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}
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static struct usb_driver karma_driver = {
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.name = "ums-karma",
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.probe = karma_probe,
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.disconnect = usb_stor_disconnect,
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.suspend = usb_stor_suspend,
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.resume = usb_stor_resume,
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.reset_resume = usb_stor_reset_resume,
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.pre_reset = usb_stor_pre_reset,
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.post_reset = usb_stor_post_reset,
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.id_table = karma_usb_ids,
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.soft_unbind = 1,
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.no_dynamic_id = 1,
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};
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module_usb_driver(karma_driver);
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