drivers/staging/rts5139/rts51x.h

   1 /* Driver for Realtek RTS51xx USB card reader
   2  * Header file
   3  *
   4  * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  * Author:
  20  *   wwang (wei_wang@realsil.com.cn)
  21  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  22  * Maintainer:
  23  *   Edwin Rong (edwin_rong@realsil.com.cn)
  24  *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
  25  */
  26
  27 #ifndef __RTS51X_H
  28 #define __RTS51X_H
  29
  30 #include <linux/usb.h>
  31 #include <linux/usb_usual.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/completion.h>
  34 #include <linux/mutex.h>
  35 #include <linux/cdrom.h>
  36 #include <linux/kernel.h>
  37
  38 #include <scsi/scsi.h>
  39 #include <scsi/scsi_cmnd.h>
  40 #include <scsi/scsi_device.h>
  41 #include <scsi/scsi_devinfo.h>
  42 #include <scsi/scsi_eh.h>
  43 #include <scsi/scsi_host.h>
  44
  45 #define DRIVER_VERSION          "v1.04"
  46
  47 #define RTS51X_DESC             "Realtek RTS5139/29 USB card reader driver"
  48 #define RTS51X_NAME             "rts5139"
  49 #define RTS51X_CTL_THREAD       "rts5139-control"
  50 #define RTS51X_SCAN_THREAD      "rts5139-scan"
  51 #define RTS51X_POLLING_THREAD   "rts5139-polling"
  52
  53 #define POLLING_IN_THREAD
  54 /* #define SCSI_SCAN_DELAY */
  55 #define SUPPORT_FILE_OP
  56
  57 #define wait_timeout_x(task_state, msecs)       \
  58 do {                                            \
  59         set_current_state((task_state));        \
  60         schedule_timeout((msecs) * HZ / 1000);  \
  61 } while (0)
  62
  63 #define wait_timeout(msecs)     wait_timeout_x(TASK_INTERRUPTIBLE, (msecs))
  64
  65 #define SCSI_LUN(srb)           ((srb)->device->lun)
  66
  67 /* Size of the DMA-mapped I/O buffer */
  68 #define RTS51X_IOBUF_SIZE       1024
  69 /* Size of the autosense data buffer */
  70 #define RTS51X_SENSE_SIZE       18
  71
  72 /* Dynamic bitflag definitions (dflags): used in set_bit() etc. */
  73 #define FLIDX_URB_ACTIVE        0       /* current_urb is in use    */
  74 #define FLIDX_SG_ACTIVE         1       /* current_sg is in use     */
  75 #define FLIDX_ABORTING          2       /* abort is in progress     */
  76 #define FLIDX_DISCONNECTING     3       /* disconnect in progress   */
  77 #define FLIDX_RESETTING         4       /* device reset in progress */
  78 #define FLIDX_TIMED_OUT         5       /* SCSI midlayer timed out  */
  79 #define FLIDX_DONT_SCAN         6       /* don't scan (disconnect)  */
  80
  81 struct rts51x_chip;
  82
  83 struct rts51x_usb {
  84         /* The device we're working with
  85          * It's important to note:
  86          *    (o) you must hold dev_mutex to change pusb_dev
  87          */
  88         struct mutex dev_mutex; /* protect pusb_dev */
  89         struct usb_device *pusb_dev;    /* this usb_device */
  90         struct usb_interface *pusb_intf;        /* this interface */
  91
  92         unsigned long dflags;   /* dynamic atomic bitflags */
  93
  94         unsigned int send_bulk_pipe;    /* cached pipe values */
  95         unsigned int recv_bulk_pipe;
  96         unsigned int send_ctrl_pipe;
  97         unsigned int recv_ctrl_pipe;
  98         unsigned int recv_intr_pipe;
  99
 100         u8 ifnum;               /* interface number   */
 101         u8 ep_bInterval;        /* interrupt interval */
 102
 103         /* control and bulk communications data */
 104         struct urb *current_urb;        /* USB requests         */
 105         struct urb *intr_urb;   /* Interrupt USB request */
 106         struct usb_ctrlrequest *cr;     /* control requests     */
 107         struct usb_sg_request current_sg;       /* scatter-gather req.  */
 108         unsigned char *iobuf;   /* I/O buffer           */
 109         dma_addr_t cr_dma;      /* buffer DMA addresses */
 110         dma_addr_t iobuf_dma;
 111         struct task_struct *ctl_thread; /* the control thread   */
 112         struct task_struct *polling_thread;     /* the polling thread   */
 113
 114         /* mutual exclusion and synchronization structures */
 115         struct completion cmnd_ready;   /* to sleep thread on      */
 116         struct completion control_exit; /* control thread exit     */
 117         struct completion polling_exit; /* polling thread exit     */
 118         struct completion notify;       /* thread begin/end        */
 119 #ifdef SCSI_SCAN_DELAY
 120         wait_queue_head_t delay_wait;   /* wait during scan, reset */
 121         struct completion scanning_done;        /* wait for scan thread    */
 122 #endif
 123 };
 124
 125 extern struct usb_driver rts51x_driver;
 126
 127 static inline void get_current_time(u8 *timeval_buf, int buf_len)
 128 {
 129         struct timeval tv;
 130
 131         if (!timeval_buf || (buf_len < 8))
 132                 return;
 133
 134         do_gettimeofday(&tv);
 135
 136         timeval_buf[0] = (u8) (tv.tv_sec >> 24);
 137         timeval_buf[1] = (u8) (tv.tv_sec >> 16);
 138         timeval_buf[2] = (u8) (tv.tv_sec >> 8);
 139         timeval_buf[3] = (u8) (tv.tv_sec);
 140         timeval_buf[4] = (u8) (tv.tv_usec >> 24);
 141         timeval_buf[5] = (u8) (tv.tv_usec >> 16);
 142         timeval_buf[6] = (u8) (tv.tv_usec >> 8);
 143         timeval_buf[7] = (u8) (tv.tv_usec);
 144 }
 145
 146 #define SND_CTRL_PIPE(chip)     ((chip)->usb->send_ctrl_pipe)
 147 #define RCV_CTRL_PIPE(chip)     ((chip)->usb->recv_ctrl_pipe)
 148 #define SND_BULK_PIPE(chip)     ((chip)->usb->send_bulk_pipe)
 149 #define RCV_BULK_PIPE(chip)     ((chip)->usb->recv_bulk_pipe)
 150 #define RCV_INTR_PIPE(chip)     ((chip)->usb->recv_intr_pipe)
 151
 152 /* The scsi_lock() and scsi_unlock() macros protect the sm_state and the
 153  * single queue element srb for write access */
 154 #define scsi_unlock(host)       spin_unlock_irq(host->host_lock)
 155 #define scsi_lock(host)         spin_lock_irq(host->host_lock)
 156
 157 #define GET_PM_USAGE_CNT(chip)  \
 158         atomic_read(&((chip)->usb->pusb_intf->pm_usage_cnt))
 159 #define SET_PM_USAGE_CNT(chip, cnt)     \
 160         atomic_set(&((chip)->usb->pusb_intf->pm_usage_cnt), (cnt))
 161
 162 /* Compatible macros while we switch over */
 163 static inline void *usb_buffer_alloc(struct usb_device *dev, size_t size,
 164                                      gfp_t mem_flags, dma_addr_t *dma)
 165 {
 166         return usb_alloc_coherent(dev, size, mem_flags, dma);
 167 }
 168
 169 static inline void usb_buffer_free(struct usb_device *dev, size_t size,
 170                                    void *addr, dma_addr_t dma)
 171 {
 172         return usb_free_coherent(dev, size, addr, dma);
 173 }
 174
 175 /* Convert between us_data and the corresponding Scsi_Host */
 176 static inline struct Scsi_Host *rts51x_to_host(struct rts51x_chip *chip)
 177 {
 178         return container_of((void *)chip, struct Scsi_Host, hostdata);
 179 }
 180
 181 static inline struct rts51x_chip *host_to_rts51x(struct Scsi_Host *host)
 182 {
 183         return (struct rts51x_chip *)(host->hostdata);
 184 }
 185
 186 /* struct scsi_cmnd transfer buffer access utilities */
 187 enum xfer_buf_dir { TO_XFER_BUF, FROM_XFER_BUF };
 188
 189 /* General routines provided by the usb-storage standard core */
 190 #ifdef CONFIG_PM
 191 void rts51x_try_to_enter_ss(struct rts51x_chip *chip);
 192 void rts51x_try_to_exit_ss(struct rts51x_chip *chip);
 193 int rts51x_suspend(struct usb_interface *iface, pm_message_t message);
 194 int rts51x_resume(struct usb_interface *iface);
 195 int rts51x_reset_resume(struct usb_interface *iface);
 196 #else
 197 #define rts51x_suspend          NULL
 198 #define rts51x_resume           NULL
 199 #define rts51x_reset_resume     NULL
 200 #endif
 201
 202 extern struct scsi_host_template rts51x_host_template;
 203
 204 #endif /* __RTS51X_H */