drivers/staging/rts5208/rtsx.h

   1 /* Driver for Realtek PCI-Express card reader
   2  * Header file
   3  *
   4  * Copyright(c) 2009-2013 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  *   Wei WANG (wei_wang@realsil.com.cn)
  21  *   Micky Ching (micky_ching@realsil.com.cn)
  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/slab.h>
  35 #include <linux/pci.h>
  36 #include <linux/mutex.h>
  37 #include <linux/cdrom.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/timer.h>
  40 #include <linux/time.h>
  41
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_devinfo.h>
  46 #include <scsi/scsi_eh.h>
  47 #include <scsi/scsi_host.h>
  48
  49 #include "debug.h"
  50 #include "trace.h"
  51 #include "general.h"
  52
  53 #define CR_DRIVER_NAME          "rts5208"
  54
  55 #define pci_get_bus_and_slot(bus, devfn)        \
  56         pci_get_domain_bus_and_slot(0, (bus), (devfn))
  57
  58 /*
  59  * macros for easy use
  60  */
  61 #define rtsx_writel(chip, reg, value) \
  62         iowrite32(value, (chip)->rtsx->remap_addr + reg)
  63 #define rtsx_readl(chip, reg) \
  64         ioread32((chip)->rtsx->remap_addr + reg)
  65 #define rtsx_writew(chip, reg, value) \
  66         iowrite16(value, (chip)->rtsx->remap_addr + reg)
  67 #define rtsx_readw(chip, reg) \
  68         ioread16((chip)->rtsx->remap_addr + reg)
  69 #define rtsx_writeb(chip, reg, value) \
  70         iowrite8(value, (chip)->rtsx->remap_addr + reg)
  71 #define rtsx_readb(chip, reg) \
  72         ioread8((chip)->rtsx->remap_addr + reg)
  73
  74 #define rtsx_read_config_byte(chip, where, val) \
  75         pci_read_config_byte((chip)->rtsx->pci, where, val)
  76
  77 #define rtsx_write_config_byte(chip, where, val) \
  78         pci_write_config_byte((chip)->rtsx->pci, where, val)
  79
  80 #define wait_timeout_x(task_state, msecs)               \
  81 do {                                                    \
  82                 set_current_state((task_state));        \
  83                 schedule_timeout((msecs) * HZ / 1000);  \
  84 } while (0)
  85 #define wait_timeout(msecs)     wait_timeout_x(TASK_INTERRUPTIBLE, (msecs))
  86
  87
  88 #define STATE_TRANS_NONE        0
  89 #define STATE_TRANS_CMD         1
  90 #define STATE_TRANS_BUF         2
  91 #define STATE_TRANS_SG          3
  92
  93 #define TRANS_NOT_READY         0
  94 #define TRANS_RESULT_OK         1
  95 #define TRANS_RESULT_FAIL       2
  96
  97 #define SCSI_LUN(srb)           ((srb)->device->lun)
  98
  99 typedef unsigned long DELAY_PARA_T;
 100
 101 struct rtsx_chip;
 102
 103 struct rtsx_dev {
 104         struct pci_dev *pci;
 105
 106         /* pci resources */
 107         unsigned long           addr;
 108         void __iomem            *remap_addr;
 109         int irq;
 110
 111         /* locks */
 112         spinlock_t              reg_lock;
 113
 114         struct task_struct      *ctl_thread;     /* the control thread   */
 115         struct task_struct      *polling_thread; /* the polling thread   */
 116
 117         /* mutual exclusion and synchronization structures */
 118         struct completion       cmnd_ready;      /* to sleep thread on      */
 119         struct completion       control_exit;    /* control thread exit     */
 120         struct completion       polling_exit;    /* polling thread exit     */
 121         struct completion       notify;          /* thread begin/end        */
 122         struct completion       scanning_done;   /* wait for scan thread    */
 123
 124         wait_queue_head_t       delay_wait;      /* wait during scan, reset */
 125         struct mutex            dev_mutex;
 126
 127         /* host reserved buffer */
 128         void                    *rtsx_resv_buf;
 129         dma_addr_t              rtsx_resv_buf_addr;
 130
 131         char                    trans_result;
 132         char                    trans_state;
 133
 134         struct completion       *done;
 135         /* Whether interrupt handler should care card cd info */
 136         u32                     check_card_cd;
 137
 138         struct rtsx_chip        *chip;
 139 };
 140
 141 typedef struct rtsx_dev rtsx_dev_t;
 142
 143 /* Convert between rtsx_dev and the corresponding Scsi_Host */
 144 static inline struct Scsi_Host *rtsx_to_host(struct rtsx_dev *dev)
 145 {
 146         return container_of((void *) dev, struct Scsi_Host, hostdata);
 147 }
 148 static inline struct rtsx_dev *host_to_rtsx(struct Scsi_Host *host)
 149 {
 150         return (struct rtsx_dev *) host->hostdata;
 151 }
 152
 153 static inline void get_current_time(u8 *timeval_buf, int buf_len)
 154 {
 155         struct timeval tv;
 156
 157         if (!timeval_buf || (buf_len < 8))
 158                 return;
 159
 160         do_gettimeofday(&tv);
 161
 162         timeval_buf[0] = (u8)(tv.tv_sec >> 24);
 163         timeval_buf[1] = (u8)(tv.tv_sec >> 16);
 164         timeval_buf[2] = (u8)(tv.tv_sec >> 8);
 165         timeval_buf[3] = (u8)(tv.tv_sec);
 166         timeval_buf[4] = (u8)(tv.tv_usec >> 24);
 167         timeval_buf[5] = (u8)(tv.tv_usec >> 16);
 168         timeval_buf[6] = (u8)(tv.tv_usec >> 8);
 169         timeval_buf[7] = (u8)(tv.tv_usec);
 170 }
 171
 172 /* The scsi_lock() and scsi_unlock() macros protect the sm_state and the
 173  * single queue element srb for write access */
 174 #define scsi_unlock(host)       spin_unlock_irq(host->host_lock)
 175 #define scsi_lock(host)         spin_lock_irq(host->host_lock)
 176
 177 #define lock_state(chip)        spin_lock_irq(&((chip)->rtsx->reg_lock))
 178 #define unlock_state(chip)      spin_unlock_irq(&((chip)->rtsx->reg_lock))
 179
 180 /* struct scsi_cmnd transfer buffer access utilities */
 181 enum xfer_buf_dir       {TO_XFER_BUF, FROM_XFER_BUF};
 182
 183 int rtsx_read_pci_cfg_byte(u8 bus, u8 dev, u8 func, u8 offset, u8 *val);
 184
 185 #endif  /* __REALTEK_RTSX_H */