edwin_rong | 1dac418 | 2011-07-19 17:10:35 +0800 | [diff] [blame] | 1 | /* Driver for Realtek RTS51xx USB card reader |
| 2 | * |
| 3 | * Copyright(c) 2009 Realtek Semiconductor Corp. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License as published by the |
| 7 | * Free Software Foundation; either version 2, or (at your option) any |
| 8 | * later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | * |
| 18 | * Author: |
| 19 | * wwang (wei_wang@realsil.com.cn) |
| 20 | * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China |
| 21 | * Maintainer: |
| 22 | * Edwin Rong (edwin_rong@realsil.com.cn) |
| 23 | * No. 450, Shenhu Road, Suzhou Industry Park, Suzhou, China |
| 24 | */ |
| 25 | |
| 26 | #include "rts51x.h" |
| 27 | |
| 28 | #ifdef SUPPORT_FILE_OP |
| 29 | |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/stat.h> |
| 32 | #include <linux/kref.h> |
| 33 | #include <linux/slab.h> |
| 34 | |
| 35 | #include "rts51x_chip.h" |
| 36 | #include "rts51x_card.h" |
| 37 | #include "rts51x_fop.h" |
| 38 | #include "sd_cprm.h" |
| 39 | #include "rts51x.h" |
| 40 | |
| 41 | #define RTS5139_IOC_MAGIC 0x39 |
| 42 | |
| 43 | #define RTS5139_IOC_SD_DIRECT _IOWR(RTS5139_IOC_MAGIC, 0xA0, int) |
| 44 | #define RTS5139_IOC_SD_GET_RSP _IOWR(RTS5139_IOC_MAGIC, 0xA1, int) |
| 45 | |
| 46 | static int rts51x_sd_direct_cmnd(struct rts51x_chip *chip, |
| 47 | struct sd_direct_cmnd *cmnd) |
| 48 | { |
| 49 | int retval; |
| 50 | u8 dir, cmd12, standby, acmd, cmd_idx, rsp_code; |
| 51 | u8 *buf; |
| 52 | u32 arg, len; |
| 53 | |
| 54 | dir = (cmnd->cmnd[0] >> 3) & 0x03; |
| 55 | cmd12 = (cmnd->cmnd[0] >> 2) & 0x01; |
| 56 | standby = (cmnd->cmnd[0] >> 1) & 0x01; |
| 57 | acmd = cmnd->cmnd[0] & 0x01; |
| 58 | cmd_idx = cmnd->cmnd[1]; |
| 59 | arg = ((u32) (cmnd->cmnd[2]) << 24) | ((u32) (cmnd->cmnd[3]) << 16) | |
| 60 | ((u32) (cmnd->cmnd[4]) << 8) | cmnd->cmnd[5]; |
| 61 | len = |
| 62 | ((u32) (cmnd->cmnd[6]) << 16) | ((u32) (cmnd->cmnd[7]) << 8) | |
| 63 | cmnd->cmnd[8]; |
| 64 | rsp_code = cmnd->cmnd[9]; |
| 65 | |
| 66 | if (dir) { |
| 67 | if (!cmnd->buf || (cmnd->buf_len < len)) |
| 68 | TRACE_RET(chip, STATUS_FAIL); |
| 69 | } |
| 70 | |
| 71 | switch (dir) { |
| 72 | case 0: |
| 73 | /* No data */ |
| 74 | retval = ext_sd_execute_no_data(chip, chip->card2lun[SD_CARD], |
| 75 | cmd_idx, standby, acmd, |
| 76 | rsp_code, arg); |
| 77 | if (retval != TRANSPORT_GOOD) |
| 78 | TRACE_RET(chip, STATUS_FAIL); |
| 79 | break; |
| 80 | |
| 81 | case 1: |
| 82 | /* Read from card */ |
| 83 | buf = kmalloc(cmnd->buf_len, GFP_KERNEL); |
| 84 | if (!buf) |
| 85 | TRACE_RET(chip, STATUS_NOMEM); |
| 86 | |
| 87 | retval = ext_sd_execute_read_data(chip, chip->card2lun[SD_CARD], |
| 88 | cmd_idx, cmd12, standby, acmd, |
| 89 | rsp_code, arg, len, buf, |
| 90 | cmnd->buf_len, 0); |
| 91 | if (retval != TRANSPORT_GOOD) { |
| 92 | kfree(buf); |
| 93 | TRACE_RET(chip, STATUS_FAIL); |
| 94 | } |
| 95 | |
| 96 | retval = |
| 97 | copy_to_user((void *)cmnd->buf, (void *)buf, cmnd->buf_len); |
| 98 | if (retval) { |
| 99 | kfree(buf); |
| 100 | TRACE_RET(chip, STATUS_NOMEM); |
| 101 | } |
| 102 | |
| 103 | kfree(buf); |
| 104 | break; |
| 105 | |
| 106 | case 2: |
| 107 | /* Write to card */ |
| 108 | buf = kmalloc(cmnd->buf_len, GFP_KERNEL); |
| 109 | if (!buf) |
| 110 | TRACE_RET(chip, STATUS_NOMEM); |
| 111 | |
| 112 | retval = |
| 113 | copy_from_user((void *)buf, (void *)cmnd->buf, |
| 114 | cmnd->buf_len); |
| 115 | if (retval) { |
| 116 | kfree(buf); |
| 117 | TRACE_RET(chip, STATUS_NOMEM); |
| 118 | } |
| 119 | |
| 120 | retval = |
| 121 | ext_sd_execute_write_data(chip, chip->card2lun[SD_CARD], |
| 122 | cmd_idx, cmd12, standby, acmd, |
| 123 | rsp_code, arg, len, buf, |
| 124 | cmnd->buf_len, 0); |
| 125 | if (retval != TRANSPORT_GOOD) { |
| 126 | kfree(buf); |
| 127 | TRACE_RET(chip, STATUS_FAIL); |
| 128 | } |
| 129 | |
| 130 | kfree(buf); |
| 131 | |
| 132 | break; |
| 133 | |
| 134 | default: |
| 135 | TRACE_RET(chip, STATUS_FAIL); |
| 136 | } |
| 137 | |
| 138 | return STATUS_SUCCESS; |
| 139 | } |
| 140 | |
| 141 | static int rts51x_sd_get_rsp(struct rts51x_chip *chip, struct sd_rsp *rsp) |
| 142 | { |
| 143 | struct sd_info *sd_card = &(chip->sd_card); |
| 144 | int count = 0, retval; |
| 145 | |
| 146 | if (sd_card->pre_cmd_err) { |
| 147 | sd_card->pre_cmd_err = 0; |
| 148 | TRACE_RET(chip, STATUS_FAIL); |
| 149 | } |
| 150 | |
| 151 | if (sd_card->last_rsp_type == SD_RSP_TYPE_R0) |
| 152 | TRACE_RET(chip, STATUS_FAIL); |
| 153 | else if (sd_card->last_rsp_type == SD_RSP_TYPE_R2) |
| 154 | count = (rsp->rsp_len < 17) ? rsp->rsp_len : 17; |
| 155 | else |
| 156 | count = (rsp->rsp_len < 6) ? rsp->rsp_len : 6; |
| 157 | |
| 158 | retval = copy_to_user((void *)rsp->rsp, (void *)sd_card->rsp, count); |
| 159 | if (retval) |
| 160 | TRACE_RET(chip, STATUS_NOMEM); |
| 161 | |
| 162 | RTS51X_DEBUGP("Response length: %d\n", count); |
| 163 | RTS51X_DEBUGP("Response: 0x%x 0x%x 0x%x 0x%x\n", |
| 164 | sd_card->rsp[0], sd_card->rsp[1], sd_card->rsp[2], |
| 165 | sd_card->rsp[3]); |
| 166 | |
| 167 | return STATUS_SUCCESS; |
| 168 | } |
| 169 | |
| 170 | int rts51x_open(struct inode *inode, struct file *filp) |
| 171 | { |
| 172 | struct rts51x_chip *chip; |
| 173 | struct usb_interface *interface; |
| 174 | int subminor; |
| 175 | int retval = 0; |
| 176 | |
| 177 | subminor = iminor(inode); |
| 178 | |
| 179 | interface = usb_find_interface(&rts51x_driver, subminor); |
| 180 | if (!interface) { |
| 181 | RTS51X_DEBUGP("%s - error, can't find device for minor %d\n", |
| 182 | __func__, subminor); |
| 183 | retval = -ENODEV; |
| 184 | goto exit; |
| 185 | } |
| 186 | |
| 187 | chip = (struct rts51x_chip *)usb_get_intfdata(interface); |
| 188 | if (!chip) { |
| 189 | RTS51X_DEBUGP("Can't find chip\n"); |
| 190 | retval = -ENODEV; |
| 191 | goto exit; |
| 192 | } |
| 193 | |
| 194 | /* Increase our reference to the host */ |
| 195 | scsi_host_get(rts51x_to_host(chip)); |
| 196 | |
| 197 | /* lock the device pointers */ |
| 198 | mutex_lock(&(chip->usb->dev_mutex)); |
| 199 | |
| 200 | /* save our object in the file's private structure */ |
| 201 | filp->private_data = chip; |
| 202 | |
| 203 | /* unlock the device pointers */ |
| 204 | mutex_unlock(&chip->usb->dev_mutex); |
| 205 | |
| 206 | exit: |
| 207 | return retval; |
| 208 | } |
| 209 | |
| 210 | int rts51x_release(struct inode *inode, struct file *filp) |
| 211 | { |
| 212 | struct rts51x_chip *chip; |
| 213 | |
| 214 | chip = (struct rts51x_chip *)filp->private_data; |
| 215 | if (chip == NULL) |
| 216 | return -ENODEV; |
| 217 | |
| 218 | /* Drop our reference to the host; the SCSI core will free it |
| 219 | * (and "chip" along with it) when the refcount becomes 0. */ |
| 220 | scsi_host_put(rts51x_to_host(chip)); |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | ssize_t rts51x_read(struct file *filp, char __user *buf, size_t count, |
| 226 | loff_t *f_pos) |
| 227 | { |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | ssize_t rts51x_write(struct file *filp, const char __user *buf, size_t count, |
| 232 | loff_t *f_pos) |
| 233 | { |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | #if 0 /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36) */ |
| 238 | int rts51x_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
| 239 | unsigned long arg) |
| 240 | #else |
| 241 | long rts51x_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 242 | #endif |
| 243 | { |
| 244 | struct rts51x_chip *chip; |
| 245 | struct sd_direct_cmnd cmnd; |
| 246 | struct sd_rsp rsp; |
| 247 | int retval = 0; |
| 248 | |
| 249 | chip = (struct rts51x_chip *)filp->private_data; |
| 250 | if (chip == NULL) |
| 251 | return -ENODEV; |
| 252 | |
| 253 | /* lock the device pointers */ |
| 254 | mutex_lock(&(chip->usb->dev_mutex)); |
| 255 | |
| 256 | switch (cmd) { |
| 257 | case RTS5139_IOC_SD_DIRECT: |
| 258 | retval = |
| 259 | copy_from_user((void *)&cmnd, (void *)arg, |
| 260 | sizeof(struct sd_direct_cmnd)); |
| 261 | if (retval) { |
| 262 | retval = -ENOMEM; |
| 263 | TRACE_GOTO(chip, exit); |
| 264 | } |
| 265 | retval = rts51x_sd_direct_cmnd(chip, &cmnd); |
| 266 | if (retval != STATUS_SUCCESS) { |
| 267 | retval = -EIO; |
| 268 | TRACE_GOTO(chip, exit); |
| 269 | } |
| 270 | break; |
| 271 | |
| 272 | case RTS5139_IOC_SD_GET_RSP: |
| 273 | retval = |
| 274 | copy_from_user((void *)&rsp, (void *)arg, |
| 275 | sizeof(struct sd_rsp)); |
| 276 | if (retval) { |
| 277 | retval = -ENOMEM; |
| 278 | TRACE_GOTO(chip, exit); |
| 279 | } |
| 280 | retval = rts51x_sd_get_rsp(chip, &rsp); |
| 281 | if (retval != STATUS_SUCCESS) { |
| 282 | retval = -EIO; |
| 283 | TRACE_GOTO(chip, exit); |
| 284 | } |
| 285 | break; |
| 286 | |
| 287 | default: |
| 288 | break; |
| 289 | } |
| 290 | |
| 291 | exit: |
| 292 | /* unlock the device pointers */ |
| 293 | mutex_unlock(&chip->usb->dev_mutex); |
| 294 | |
| 295 | return retval; |
| 296 | } |
| 297 | |
| 298 | #endif |