drivers/staging/rts_pstor/rtsx.h

   1 /* Driver for Realtek PCI-Express 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  */
  23
  24 #ifndef __REALTEK_RTSX_H
  25 #define __REALTEK_RTSX_H
  26
  27 #include <linux/io.h>
  28 #include <linux/bitops.h>
  29 #include <linux/delay.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/moduleparam.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/pci.h>
  37 #include <linux/mutex.h>
  38 #include <linux/cdrom.h>
  39 #include <linux/workqueue.h>
  40 #include <linux/timer.h>
  41 #include <linux/time.h>
  42
  43 #include <scsi/scsi.h>
  44 #include <scsi/scsi_cmnd.h>
  45 #include <scsi/scsi_device.h>
  46 #include <scsi/scsi_devinfo.h>
  47 #include <scsi/scsi_eh.h>
  48 #include <scsi/scsi_host.h>
  49
  50 #include "debug.h"
  51 #include "trace.h"
  52 #include "general.h"
  53
  54 #define CR_DRIVER_NAME          "rts_pstor"
  55
  56 #define pci_get_bus_and_slot(bus, devfn)        \
  57         pci_get_domain_bus_and_slot(0, (bus), (devfn))
  58
  59 /*
  60  * macros for easy use
  61  */
  62 #define rtsx_writel(chip, reg, value) \
  63         iowrite32(value, (chip)->rtsx->remap_addr + reg)
  64 #define rtsx_readl(chip, reg) \
  65         ioread32((chip)->rtsx->remap_addr + reg)
  66 #define rtsx_writew(chip, reg, value) \
  67         iowrite16(value, (chip)->rtsx->remap_addr + reg)
  68 #define rtsx_readw(chip, reg) \
  69         ioread16((chip)->rtsx->remap_addr + reg)
  70 #define rtsx_writeb(chip, reg, value) \
  71         iowrite8(value, (chip)->rtsx->remap_addr + reg)
  72 #define rtsx_readb(chip, reg) \
  73         ioread8((chip)->rtsx->remap_addr + reg)
  74
  75 #define rtsx_read_config_byte(chip, where, val) \
  76         pci_read_config_byte((chip)->rtsx->pci, where, val)
  77
  78 #define rtsx_write_config_byte(chip, where, val) \
  79         pci_write_config_byte((chip)->rtsx->pci, where, val)
  80
  81 #define wait_timeout_x(task_state, msecs)               \
  82 do {                                                    \
  83                 set_current_state((task_state));        \
  84                 schedule_timeout((msecs) * HZ / 1000);  \
  85 } while (0)
  86 #define wait_timeout(msecs)     wait_timeout_x(TASK_INTERRUPTIBLE, (msecs))
  87
  88
  89 #define STATE_TRANS_NONE        0
  90 #define STATE_TRANS_CMD         1
  91 #define STATE_TRANS_BUF         2
  92 #define STATE_TRANS_SG          3
  93
  94 #define TRANS_NOT_READY         0
  95 #define TRANS_RESULT_OK         1
  96 #define TRANS_RESULT_FAIL       2
  97
  98 #define SCSI_LUN(srb)           ((srb)->device->lun)
  99
 100 typedef unsigned long DELAY_PARA_T;
 101
 102 struct rtsx_chip;
 103
 104 struct rtsx_dev {
 105         struct pci_dev *pci;
 106
 107         /* pci resources */
 108         unsigned long           addr;
 109         void __iomem            *remap_addr;
 110         int irq;
 111
 112         /* locks */
 113         spinlock_t              reg_lock;
 114
 115         struct task_struct      *ctl_thread;     /* the control thread   */
 116         struct task_struct      *polling_thread; /* the polling thread   */
 117
 118         /* mutual exclusion and synchronization structures */
 119         struct completion       cmnd_ready;      /* to sleep thread on      */
 120         struct completion       control_exit;    /* control thread exit     */
 121         struct completion       polling_exit;    /* polling thread exit     */
 122         struct completion       notify;          /* thread begin/end        */
 123         struct completion       scanning_done;   /* wait for scan thread    */
 124
 125         wait_queue_head_t       delay_wait;      /* wait during scan, reset */
 126         struct mutex            dev_mutex;
 127
 128         /* host reserved buffer */
 129         void                    *rtsx_resv_buf;
 130         dma_addr_t              rtsx_resv_buf_addr;
 131
 132         char                    trans_result;
 133         char                    trans_state;
 134
 135         struct completion       *done;
 136         /* Whether interrupt handler should care card cd info */
 137         u32                     check_card_cd;
 138
 139         struct rtsx_chip        *chip;
 140 };
 141
 142 typedef struct rtsx_dev rtsx_dev_t;
 143
 144 /* Convert between rtsx_dev and the corresponding Scsi_Host */
 145 static inline struct Scsi_Host *rtsx_to_host(struct rtsx_dev *dev)
 146 {
 147         return container_of((void *) dev, struct Scsi_Host, hostdata);
 148 }
 149 static inline struct rtsx_dev *host_to_rtsx(struct Scsi_Host *host)
 150 {
 151         return (struct rtsx_dev *) host->hostdata;
 152 }
 153
 154 static inline void get_current_time(u8 *timeval_buf, int buf_len)
 155 {
 156         struct timeval tv;
 157
 158         if (!timeval_buf || (buf_len < 8))
 159                 return;
 160
 161         do_gettimeofday(&tv);
 162
 163         timeval_buf[0] = (u8)(tv.tv_sec >> 24);
 164         timeval_buf[1] = (u8)(tv.tv_sec >> 16);
 165         timeval_buf[2] = (u8)(tv.tv_sec >> 8);
 166         timeval_buf[3] = (u8)(tv.tv_sec);
 167         timeval_buf[4] = (u8)(tv.tv_usec >> 24);
 168         timeval_buf[5] = (u8)(tv.tv_usec >> 16);
 169         timeval_buf[6] = (u8)(tv.tv_usec >> 8);
 170         timeval_buf[7] = (u8)(tv.tv_usec);
 171 }
 172
 173 /* The scsi_lock() and scsi_unlock() macros protect the sm_state and the
 174  * single queue element srb for write access */
 175 #define scsi_unlock(host)       spin_unlock_irq(host->host_lock)
 176 #define scsi_lock(host)         spin_lock_irq(host->host_lock)
 177
 178 #define lock_state(chip)        spin_lock_irq(&((chip)->rtsx->reg_lock))
 179 #define unlock_state(chip)      spin_unlock_irq(&((chip)->rtsx->reg_lock))
 180
 181 /* struct scsi_cmnd transfer buffer access utilities */
 182 enum xfer_buf_dir       {TO_XFER_BUF, FROM_XFER_BUF};
 183
 184 int rtsx_read_pci_cfg_byte(u8 bus, u8 dev, u8 func, u8 offset, u8 *val);
 185
 186 #endif  /* __REALTEK_RTSX_H */