1 files changed, 298 insertions, 0 deletions
diff --git a/drivers/staging/rts5139/rts51x_fop.c b/drivers/staging/rts5139/rts51x_fop.c
new file mode 100644
index 000000000000..6eaebb6223c9
--- /dev/null
+++ b/drivers/staging/rts5139/rts51x_fop.c
@@ -0,0 +1,298 @@
+/* Driver for Realtek RTS51xx USB card reader
+ *
+ * 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
+ * Maintainer:
+ *   Edwin Rong (edwin_rong@realsil.com.cn)
+ *   No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China
+ */
+
+#include "rts51x.h"
+
+#ifdef SUPPORT_FILE_OP
+
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/kref.h>
+#include <linux/slab.h>
+
+#include "rts51x_chip.h"
+#include "rts51x_card.h"
+#include "rts51x_fop.h"
+#include "sd_cprm.h"
+#include "rts51x.h"
+
+#define RTS5139_IOC_MAGIC		0x39
+
+#define RTS5139_IOC_SD_DIRECT		_IOWR(RTS5139_IOC_MAGIC, 0xA0, int)
+#define RTS5139_IOC_SD_GET_RSP		_IOWR(RTS5139_IOC_MAGIC, 0xA1, int)
+
+static int rts51x_sd_direct_cmnd(struct rts51x_chip *chip,
+				 struct sd_direct_cmnd *cmnd)
+{
+	int retval;
+	u8 dir, cmd12, standby, acmd, cmd_idx, rsp_code;
+	u8 *buf;
+	u32 arg, len;
+
+	dir = (cmnd->cmnd[0] >> 3) & 0x03;
+	cmd12 = (cmnd->cmnd[0] >> 2) & 0x01;
+	standby = (cmnd->cmnd[0] >> 1) & 0x01;
+	acmd = cmnd->cmnd[0] & 0x01;
+	cmd_idx = cmnd->cmnd[1];
+	arg = ((u32) (cmnd->cmnd[2]) << 24) | ((u32) (cmnd->cmnd[3]) << 16) |
+	    ((u32) (cmnd->cmnd[4]) << 8) | cmnd->cmnd[5];
+	len =
+	    ((u32) (cmnd->cmnd[6]) << 16) | ((u32) (cmnd->cmnd[7]) << 8) |
+	    cmnd->cmnd[8];
+	rsp_code = cmnd->cmnd[9];
+
+	if (dir) {
+		if (!cmnd->buf || (cmnd->buf_len < len))
+			TRACE_RET(chip, STATUS_FAIL);
+	}
+
+	switch (dir) {
+	case 0:
+		/* No data */
+		retval = ext_sd_execute_no_data(chip, chip->card2lun[SD_CARD],
+						cmd_idx, standby, acmd,
+						rsp_code, arg);
+		if (retval != TRANSPORT_GOOD)
+			TRACE_RET(chip, STATUS_FAIL);
+		break;
+
+	case 1:
+		/* Read from card */
+		buf = kmalloc(cmnd->buf_len, GFP_KERNEL);
+		if (!buf)
+			TRACE_RET(chip, STATUS_NOMEM);
+
+		retval = ext_sd_execute_read_data(chip, chip->card2lun[SD_CARD],
+						  cmd_idx, cmd12, standby, acmd,
+						  rsp_code, arg, len, buf,
+						  cmnd->buf_len, 0);
+		if (retval != TRANSPORT_GOOD) {
+			kfree(buf);
+			TRACE_RET(chip, STATUS_FAIL);
+		}
+
+		retval =
+		    copy_to_user((void *)cmnd->buf, (void *)buf, cmnd->buf_len);
+		if (retval) {
+			kfree(buf);
+			TRACE_RET(chip, STATUS_NOMEM);
+		}
+
+		kfree(buf);
+		break;
+
+	case 2:
+		/* Write to card */
+		buf = kmalloc(cmnd->buf_len, GFP_KERNEL);
+		if (!buf)
+			TRACE_RET(chip, STATUS_NOMEM);
+
+		retval =
+		    copy_from_user((void *)buf, (void *)cmnd->buf,
+				   cmnd->buf_len);
+		if (retval) {
+			kfree(buf);
+			TRACE_RET(chip, STATUS_NOMEM);
+		}
+
+		retval =
+		    ext_sd_execute_write_data(chip, chip->card2lun[SD_CARD],
+					      cmd_idx, cmd12, standby, acmd,
+					      rsp_code, arg, len, buf,
+					      cmnd->buf_len, 0);
+		if (retval != TRANSPORT_GOOD) {
+			kfree(buf);
+			TRACE_RET(chip, STATUS_FAIL);
+		}
+
+		kfree(buf);
+
+		break;
+
+	default:
+		TRACE_RET(chip, STATUS_FAIL);
+	}
+
+	return STATUS_SUCCESS;
+}
+
+static int rts51x_sd_get_rsp(struct rts51x_chip *chip, struct sd_rsp *rsp)
+{
+	struct sd_info *sd_card = &(chip->sd_card);
+	int count = 0, retval;
+
+	if (sd_card->pre_cmd_err) {
+		sd_card->pre_cmd_err = 0;
+		TRACE_RET(chip, STATUS_FAIL);
+	}
+
+	if (sd_card->last_rsp_type == SD_RSP_TYPE_R0)
+		TRACE_RET(chip, STATUS_FAIL);
+	else if (sd_card->last_rsp_type == SD_RSP_TYPE_R2)
+		count = (rsp->rsp_len < 17) ? rsp->rsp_len : 17;
+	else
+		count = (rsp->rsp_len < 6) ? rsp->rsp_len : 6;
+
+	retval = copy_to_user((void *)rsp->rsp, (void *)sd_card->rsp, count);
+	if (retval)
+		TRACE_RET(chip, STATUS_NOMEM);
+
+	RTS51X_DEBUGP("Response length: %d\n", count);
+	RTS51X_DEBUGP("Response: 0x%x 0x%x 0x%x 0x%x\n",
+		       sd_card->rsp[0], sd_card->rsp[1], sd_card->rsp[2],
+		       sd_card->rsp[3]);
+
+	return STATUS_SUCCESS;
+}
+
+int rts51x_open(struct inode *inode, struct file *filp)
+{
+	struct rts51x_chip *chip;
+	struct usb_interface *interface;
+	int subminor;
+	int retval = 0;
+
+	subminor = iminor(inode);
+
+	interface = usb_find_interface(&rts51x_driver, subminor);
+	if (!interface) {
+		RTS51X_DEBUGP("%s - error, can't find device for minor %d\n",
+			       __func__, subminor);
+		retval = -ENODEV;
+		goto exit;
+	}
+
+	chip = (struct rts51x_chip *)usb_get_intfdata(interface);
+	if (!chip) {
+		RTS51X_DEBUGP("Can't find chip\n");
+		retval = -ENODEV;
+		goto exit;
+	}
+
+	/* Increase our reference to the host */
+	scsi_host_get(rts51x_to_host(chip));
+
+	/* lock the device pointers */
+	mutex_lock(&(chip->usb->dev_mutex));
+
+	/* save our object in the file's private structure */
+	filp->private_data = chip;
+
+	/* unlock the device pointers */
+	mutex_unlock(&chip->usb->dev_mutex);
+
+exit:
+	return retval;
+}
+
+int rts51x_release(struct inode *inode, struct file *filp)
+{
+	struct rts51x_chip *chip;
+
+	chip = (struct rts51x_chip *)filp->private_data;
+	if (chip == NULL)
+		return -ENODEV;
+
+	/* Drop our reference to the host; the SCSI core will free it
+	 * (and "chip" along with it) when the refcount becomes 0. */
+	scsi_host_put(rts51x_to_host(chip));
+
+	return 0;
+}
+
+ssize_t rts51x_read(struct file *filp, char __user *buf, size_t count,
+		    loff_t *f_pos)
+{
+	return 0;
+}
+
+ssize_t rts51x_write(struct file *filp, const char __user *buf, size_t count,
+		     loff_t *f_pos)
+{
+	return 0;
+}
+
+#if 0 /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36) */
+int rts51x_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+		 unsigned long arg)
+#else
+long rts51x_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+#endif
+{
+	struct rts51x_chip *chip;
+	struct sd_direct_cmnd cmnd;
+	struct sd_rsp rsp;
+	int retval = 0;
+
+	chip = (struct rts51x_chip *)filp->private_data;
+	if (chip == NULL)
+		return -ENODEV;
+
+	/* lock the device pointers */
+	mutex_lock(&(chip->usb->dev_mutex));
+
+	switch (cmd) {
+	case RTS5139_IOC_SD_DIRECT:
+		retval =
+		    copy_from_user((void *)&cmnd, (void *)arg,
+				   sizeof(struct sd_direct_cmnd));
+		if (retval) {
+			retval = -ENOMEM;
+			TRACE_GOTO(chip, exit);
+		}
+		retval = rts51x_sd_direct_cmnd(chip, &cmnd);
+		if (retval != STATUS_SUCCESS) {
+			retval = -EIO;
+			TRACE_GOTO(chip, exit);
+		}
+		break;
+
+	case RTS5139_IOC_SD_GET_RSP:
+		retval =
+		    copy_from_user((void *)&rsp, (void *)arg,
+				   sizeof(struct sd_rsp));
+		if (retval) {
+			retval = -ENOMEM;
+			TRACE_GOTO(chip, exit);
+		}
+		retval = rts51x_sd_get_rsp(chip, &rsp);
+		if (retval != STATUS_SUCCESS) {
+			retval = -EIO;
+			TRACE_GOTO(chip, exit);
+		}
+		break;
+
+	default:
+		break;
+	}
+
+exit:
+	/* unlock the device pointers */
+	mutex_unlock(&chip->usb->dev_mutex);
+
+	return retval;
+}
+
+#endif