staging: add rts_pstor for Realtek PCIE cardreader

rts_pstor is used to support Realtek PCI-E card readers,
including rts5209, rts5208, Barossa.

Signed-off-by: wwang <wei_wang@realsil.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 183 insertions, 0 deletions

diff --git a/drivers/staging/rts_pstor/rtsx.h b/drivers/staging/rts_pstor/rtsx.h
new file mode 100644
index 00000000000..4d5ddf6fbb5
--- /dev/null
+++ b/drivers/staging/rts_pstor/rtsx.h
@@ -0,0 +1,183 @@
+/* Driver for Realtek PCI-Express card reader
+ * Header file
+ *
+ * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Author:
+ *   wwang (wei_wang@realsil.com.cn)
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#ifndef __REALTEK_RTSX_H
+#define __REALTEK_RTSX_H
+
+#include <asm/io.h>
+#include <asm/bitops.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/mutex.h>
+#include <linux/cdrom.h>
+#include <linux/workqueue.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_devinfo.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+
+#include "debug.h"
+#include "trace.h"
+#include "general.h"
+
+#define CR_DRIVER_NAME          "rts_pstor"
+
+#define pci_get_bus_and_slot(bus, devfn)        \
+        pci_get_domain_bus_and_slot(0, (bus), (devfn))
+
+/*
+ * macros for easy use
+ */
+#define rtsx_writel(chip, reg, value) \
+        iowrite32(value, (chip)->rtsx->remap_addr + reg)
+#define rtsx_readl(chip, reg) \
+        ioread32((chip)->rtsx->remap_addr + reg)
+#define rtsx_writew(chip, reg, value) \
+        iowrite16(value, (chip)->rtsx->remap_addr + reg)
+#define rtsx_readw(chip, reg) \
+        ioread16((chip)->rtsx->remap_addr + reg)
+#define rtsx_writeb(chip, reg, value) \
+        iowrite8(value, (chip)->rtsx->remap_addr + reg)
+#define rtsx_readb(chip, reg) \
+        ioread8((chip)->rtsx->remap_addr + reg)
+
+#define rtsx_read_config_byte(chip, where, val) \
+        pci_read_config_byte((chip)->rtsx->pci, where, val)
+
+#define rtsx_write_config_byte(chip, where, val) \
+        pci_write_config_byte((chip)->rtsx->pci, where, val)
+
+#define wait_timeout_x(task_state, msecs)               \
+do {                                                    \
+                set_current_state((task_state));        \
+                schedule_timeout((msecs) * HZ / 1000);  \
+} while (0)
+#define wait_timeout(msecs)     wait_timeout_x(TASK_INTERRUPTIBLE, (msecs))
+
+
+#define STATE_TRANS_NONE        0
+#define STATE_TRANS_CMD         1
+#define STATE_TRANS_BUF         2
+#define STATE_TRANS_SG          3
+
+#define TRANS_NOT_READY         0
+#define TRANS_RESULT_OK         1
+#define TRANS_RESULT_FAIL       2
+
+#define SCSI_LUN(srb)           ((srb)->device->lun)
+
+#define rtsx_alloc_dma_buf(chip, size, flag)    kmalloc((size), (flag))
+#define rtsx_free_dma_buf(chip, ptr)            kfree((ptr))
+
+typedef unsigned long DELAY_PARA_T;
+
+struct rtsx_chip;
+
+struct rtsx_dev {
+        struct pci_dev          *pci;
+
+        /* pci resources */
+        unsigned long           addr;
+        void __iomem            *remap_addr;
+        int                     irq;
+
+        /* locks */
+        spinlock_t              reg_lock;
+
+        /* mutual exclusion and synchronization structures */
+        struct semaphore        sema;            /* to sleep thread on      */
+        struct completion       notify;          /* thread begin/end        */
+        wait_queue_head_t       delay_wait;      /* wait during scan, reset */
+        struct mutex            dev_mutex;
+
+        /* host reserved buffer */
+        void                    *rtsx_resv_buf;
+        dma_addr_t              rtsx_resv_buf_addr;
+
+        char                    trans_result;
+        char                    trans_state;
+
+        struct completion       *done;
+        /* Whether interrupt handler should care card cd info */
+        u32                     check_card_cd;
+
+        struct rtsx_chip        *chip;
+};
+
+typedef struct rtsx_dev rtsx_dev_t;
+
+/* Convert between rtsx_dev and the corresponding Scsi_Host */
+static inline struct Scsi_Host *rtsx_to_host(struct rtsx_dev *dev)
+{
+        return container_of((void *) dev, struct Scsi_Host, hostdata);
+}
+static inline struct rtsx_dev *host_to_rtsx(struct Scsi_Host *host)
+{
+        return (struct rtsx_dev *) host->hostdata;
+}
+
+static inline void get_current_time(u8 *timeval_buf, int buf_len)
+{
+        struct timeval tv;
+
+        if (!timeval_buf || (buf_len < 8))
+                return;
+
+        do_gettimeofday(&tv);
+
+        timeval_buf[0] = (u8)(tv.tv_sec >> 24);
+        timeval_buf[1] = (u8)(tv.tv_sec >> 16);
+        timeval_buf[2] = (u8)(tv.tv_sec >> 8);
+        timeval_buf[3] = (u8)(tv.tv_sec);
+        timeval_buf[4] = (u8)(tv.tv_usec >> 24);
+        timeval_buf[5] = (u8)(tv.tv_usec >> 16);
+        timeval_buf[6] = (u8)(tv.tv_usec >> 8);
+        timeval_buf[7] = (u8)(tv.tv_usec);
+}
+
+/* The scsi_lock() and scsi_unlock() macros protect the sm_state and the
+ * single queue element srb for write access */
+#define scsi_unlock(host)       spin_unlock_irq(host->host_lock)
+#define scsi_lock(host)         spin_lock_irq(host->host_lock)
+
+#define lock_state(chip)        spin_lock_irq(&((chip)->rtsx->reg_lock))
+#define unlock_state(chip)      spin_unlock_irq(&((chip)->rtsx->reg_lock))
+
+/* struct scsi_cmnd transfer buffer access utilities */
+enum xfer_buf_dir       {TO_XFER_BUF, FROM_XFER_BUF};
+
+int rtsx_read_pci_cfg_byte(u8 bus, u8 dev, u8 func, u8 offset, u8 *val);
+
+#endif  /* __REALTEK_RTSX_H */