drivers/mmc/host/rk29_sdmmc_old.c

   1 /* drivers/mmc/host/rk29_sdmmc.c
   2  *
   3  * Copyright (C) 2010 ROCKCHIP, Inc.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  * mount -t debugfs debugfs /data/debugfs;cat /data/debugfs/mmc0/status
  14  * echo 't' >/proc/sysrq-trigger
  15  * echo 19 >/sys/module/wakelock/parameters/debug_mask
  16  * vdc volume uevent on
  17  */
  18
  19 #include <linux/blkdev.h>
  20 #include <linux/clk.h>
  21 #include <linux/debugfs.h>
  22 #include <linux/device.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/err.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/ioport.h>
  28 #include <linux/module.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/scatterlist.h>
  31 #include <linux/seq_file.h>
  32 #include <linux/stat.h>
  33 #include <linux/delay.h>
  34 #include <linux/irq.h>
  35 #include <linux/mmc/host.h>
  36 #include <linux/mmc/mmc.h>
  37 #include <linux/mmc/card.h>
  38 #include <linux/earlysuspend.h>
  39
  40 #include <mach/board.h>
  41 #include <mach/rk29_iomap.h>
  42 #include <mach/gpio.h>
  43 #include <mach/iomux.h>
  44
  45 #include <asm/dma.h>
  46 #include <mach/rk29-dma-pl330.h>
  47 #include <asm/scatterlist.h>
  48
  49 #include "rk2818-sdmmc.h"
  50
  51 #define RK29_SDMMC_DATA_ERROR_FLAGS     (SDMMC_INT_DRTO | SDMMC_INT_DCRC | SDMMC_INT_HTO | SDMMC_INT_SBE | SDMMC_INT_EBE | SDMMC_INT_FRUN)
  52 #define RK29_SDMMC_CMD_ERROR_FLAGS      (SDMMC_INT_RTO | SDMMC_INT_RCRC | SDMMC_INT_RE | SDMMC_INT_HLE)
  53 #define RK29_SDMMC_ERROR_FLAGS          (RK29_SDMMC_DATA_ERROR_FLAGS | RK29_SDMMC_CMD_ERROR_FLAGS | SDMMC_INT_HLE)
  54
  55 #define RK29_SDMMC_TMO_COUNT            10000
  56
  57 #define RK29_SDCARD_CLK                         50  //48Mhz
  58 #define RK29_SDIO_CLK                           50      //36Mhz
  59
  60 enum {
  61         EVENT_CMD_COMPLETE = 0,
  62         EVENT_XFER_COMPLETE,
  63         EVENT_DATA_COMPLETE,
  64         EVENT_DATA_ERROR,
  65         EVENT_XFER_ERROR
  66 };
  67 enum {
  68         MRQ_REQUEST_START = 0,
  69         MRQ_INT_CMD_DONE,  //1
  70         MRQ_INT_CMD_ERR,  //2
  71         MRQ_INT_DATA_DONE,  //3
  72         MRQ_INT_DATA_ERR,  //4
  73         MRQ_INT_CD,  //5
  74         MRQ_INT_SDIO,  //6
  75         MRQ_HAS_DATA,  //7
  76         MRQ_HAS_STOP,  //8
  77         MRQ_CMD_START_TMO,  //9
  78         MRQ_CMD_START_DONE,  //10
  79         MRQ_STOP_START_TMO,  //11
  80         MRQ_STOP_START_DONE,  //12
  81         MRQ_CLK_START_TMO,  //13
  82         MRQ_CLK_START_DONE,  //14
  83         MRQ_RESET_CTRL_ERR,  //15
  84         MRQ_RESET_CTRL_DONE,  //16
  85         MRQ_DMA_SET_ERR,  //17
  86         MRQ_START_DMA,  //18
  87         MRQ_STOP_DMA,  //19
  88         MRQ_DMA_DONE,  //20
  89         MRQ_REQUEST_DONE,  //21
  90 };
  91 enum rk29_sdmmc_state {
  92         STATE_IDLE = 0,
  93         STATE_SENDING_CMD,
  94         STATE_SENDING_DATA,
  95         STATE_DATA_BUSY,
  96         STATE_SENDING_STOP,
  97         STATE_DATA_ERROR,
  98 };
  99 #define rk29_sdmmc_test_and_clear_pending(host, event)          \
 100         test_and_clear_bit(event, &host->pending_events)
 101 #define rk29_sdmmc_set_completed(host, event)                   \
 102                 set_bit(event, &host->completed_events)
 103 #define rk29_sdmmc_set_pending(host, event)                             \
 104         set_bit(event, &host->pending_events)
 105 #define rk29_sdmmc_set_mrq_status(host, status)                         \
 106                 set_bit(status, &host->mrq_status)
 107 #define rk29_sdmmc_test_mrq_status(host, status)                                \
 108                         test_bit(status, &host->mrq_status)
 109
 110 struct rk29_sdmmc_dma_info {
 111         enum dma_ch chn;
 112         char *name;
 113         struct rk29_dma_client client;
 114 };
 115 static struct rk29_sdmmc_dma_info dma_infos[] = {
 116         {
 117                 .chn = DMACH_SDMMC,
 118                 .client = {
 119                         .name = "rk29-dma-sdmmc0",
 120                 }
 121         },
 122         {
 123                 .chn = DMACH_SDIO,
 124                 .client = {
 125                         .name = "rk29-dma-sdio1",
 126                 }
 127         },
 128 };
 129 static int rk29_sdmmc_is_sdio(struct rk29_sdmmc_platform_data *pdata)
 130 {
 131         if(strncmp(pdata->dma_name, "sdio", strlen("sdio")) == 0)
 132                 return 1;
 133         else
 134                 return 0;
 135 }
 136
 137 struct rk29_sdmmc {
 138         struct device                           *dev;
 139
 140         int                                                     is_sdio;
 141         int                                                     is_init;
 142         int                                                     gpio_det;
 143         int                                                     gpio_irq;
 144         int                                                     irq;
 145
 146         int                                                     enable_sd_warkup;
 147
 148         unsigned int                            clock;
 149         unsigned int                            ios_clock;
 150         unsigned int                            div;
 151         spinlock_t                                      lock;
 152         unsigned int                            stop_cmdr;
 153         unsigned int                            cmd_intsts;
 154         unsigned int                            data_intsts;
 155         unsigned long                           pending_events;
 156         unsigned long                           completed_events;
 157         unsigned long                           mrq_status;
 158         unsigned long                           old_mrq_status;
 159
 160         unsigned int                            bus_hz;
 161
 162
 163         void __iomem                            *regs;
 164
 165         struct mmc_host                         *mmc;
 166         struct delayed_work                     work;
 167         struct rk29_sdmmc_dma_info      dma_info;
 168         struct tasklet_struct           tasklet;
 169         struct mmc_request                      *mrq;
 170         struct mmc_command                      *cmd;
 171         struct clk                                      *clk;
 172         struct timer_list                       monitor_timer;
 173
 174         enum rk29_sdmmc_state           state;
 175         dma_addr_t                              dma_addr;
 176
 177         int (*get_wifi_cd)(struct device *);
 178 #ifdef CONFIG_HAS_EARLYSUSPEND
 179         struct early_suspend            early_suspend;
 180 #endif
 181 };
 182 struct rk29_sdmmc *sdio_host = NULL;
 183 static void rk29_sdmmc_write(unsigned char  __iomem     *regbase, unsigned int regOff,unsigned int val)
 184 {
 185         __raw_writel(val,regbase + regOff);
 186 }
 187
 188 static unsigned int rk29_sdmmc_read(unsigned char  __iomem      *regbase, unsigned int regOff)
 189 {
 190         return __raw_readl(regbase + regOff);
 191 }
 192
 193
 194 #if defined (CONFIG_DEBUG_FS)
 195 /*
 196  * The debugfs stuff below is mostly optimized away when
 197  * CONFIG_DEBUG_FS is not set.
 198  */
 199 static int rk29_sdmmc_req_show(struct seq_file *s, void *v)
 200 {
 201         struct rk29_sdmmc       *host = s->private;
 202         struct mmc_request      *mrq;
 203         struct mmc_command      *cmd;
 204         struct mmc_command      *stop;
 205         struct mmc_data         *data;
 206
 207         /* Make sure we get a consistent snapshot */
 208         spin_lock(&host->lock);
 209         mrq = host->mrq;
 210
 211         if (mrq) {
 212                 cmd = mrq->cmd;
 213                 data = mrq->data;
 214                 stop = mrq->stop;
 215
 216                 if (cmd)
 217                         seq_printf(s,
 218                                 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
 219                                 cmd->opcode, cmd->arg, cmd->flags,
 220                                 cmd->resp[0], cmd->resp[1], cmd->resp[2],
 221                                 cmd->resp[2], cmd->error);
 222                 if (data)
 223                         seq_printf(s, "DATA %u / %u * %u flg %x err %d\n",
 224                                 data->bytes_xfered, data->blocks,
 225                                 data->blksz, data->flags, data->error);
 226                 if (stop)
 227                         seq_printf(s,
 228                                 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
 229                                 stop->opcode, stop->arg, stop->flags,
 230                                 stop->resp[0], stop->resp[1], stop->resp[2],
 231                                 stop->resp[2], stop->error);
 232         }
 233
 234         spin_unlock(&host->lock);
 235
 236         return 0;
 237 }
 238
 239 static int rk29_sdmmc_regs_show(struct seq_file *s, void *v)
 240 {
 241         struct rk29_sdmmc       *host = s->private;
 242
 243         seq_printf(s, "SDMMC_CTRL:   \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CTRL));
 244         seq_printf(s, "SDMMC_PWREN:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_PWREN));
 245         seq_printf(s, "SDMMC_CLKDIV: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKDIV));
 246         seq_printf(s, "SDMMC_CLKSRC: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKSRC));
 247         seq_printf(s, "SDMMC_CLKENA: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKENA));
 248         seq_printf(s, "SDMMC_TMOUT:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TMOUT));
 249         seq_printf(s, "SDMMC_CTYPE:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CTYPE));
 250         seq_printf(s, "SDMMC_BLKSIZ: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_BLKSIZ));
 251         seq_printf(s, "SDMMC_BYTCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_BYTCNT));
 252         seq_printf(s, "SDMMC_INTMASK:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_INTMASK));
 253         seq_printf(s, "SDMMC_CMDARG: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CMDARG));
 254         seq_printf(s, "SDMMC_CMD:    \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CMD));
 255         seq_printf(s, "SDMMC_RESP0:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP0));
 256         seq_printf(s, "SDMMC_RESP1:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP1));
 257         seq_printf(s, "SDMMC_RESP2:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP2));
 258         seq_printf(s, "SDMMC_RESP3:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP3));
 259         seq_printf(s, "SDMMC_MINTSTS:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_MINTSTS));
 260         seq_printf(s, "SDMMC_RINTSTS:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RINTSTS));
 261         seq_printf(s, "SDMMC_STATUS: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_STATUS));
 262         seq_printf(s, "SDMMC_FIFOTH: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_FIFOTH));
 263         seq_printf(s, "SDMMC_CDETECT:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CDETECT));
 264         seq_printf(s, "SDMMC_WRTPRT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_WRTPRT));
 265         seq_printf(s, "SDMMC_TCBCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TCBCNT));
 266         seq_printf(s, "SDMMC_TBBCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TBBCNT));
 267         seq_printf(s, "SDMMC_DEBNCE: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_DEBNCE));
 268
 269         return 0;
 270 }
 271
 272 static int rk29_sdmmc_status_show(struct seq_file *s, void *v)
 273 {
 274         struct rk29_sdmmc       *host = s->private;
 275
 276         seq_printf(s, "state:   \t\t0x%08x\n", host->state);
 277         seq_printf(s, "pending_events:   \t0x%08lx\n", host->pending_events);
 278         seq_printf(s, "completed_events:   \t0x%08lx\n", host->completed_events);
 279         seq_printf(s, "mrq_status:   \t\t0x%08lx\n", host->mrq_status);
 280         seq_printf(s, "old_mrq_status:   \t0x%08lx\n", host->old_mrq_status);
 281
 282         return 0;
 283 }
 284
 285
 286 static int rk29_sdmmc_req_open(struct inode *inode, struct file *file)
 287 {
 288         return single_open(file, rk29_sdmmc_req_show, inode->i_private);
 289 }
 290
 291 static const struct file_operations rk29_sdmmc_req_fops = {
 292         .owner          = THIS_MODULE,
 293         .open           = rk29_sdmmc_req_open,
 294         .read           = seq_read,
 295         .llseek         = seq_lseek,
 296         .release        = single_release,
 297 };
 298
 299 static int rk29_sdmmc_regs_open(struct inode *inode, struct file *file)
 300 {
 301         return single_open(file, rk29_sdmmc_regs_show, inode->i_private);
 302 }
 303
 304 static const struct file_operations rk29_sdmmc_regs_fops = {
 305         .owner          = THIS_MODULE,
 306         .open           = rk29_sdmmc_regs_open,
 307         .read           = seq_read,
 308         .llseek         = seq_lseek,
 309         .release        = single_release,
 310 };
 311 static int rk29_sdmmc_status_open(struct inode *inode, struct file *file)
 312 {
 313         return single_open(file, rk29_sdmmc_status_show, inode->i_private);
 314 }
 315
 316 static const struct file_operations rk29_sdmmc_status_fops = {
 317         .owner          = THIS_MODULE,
 318         .open           = rk29_sdmmc_status_open,
 319         .read           = seq_read,
 320         .llseek         = seq_lseek,
 321         .release        = single_release,
 322 };
 323
 324 static void rk29_sdmmc_init_debugfs(struct rk29_sdmmc *host)
 325 {
 326         struct mmc_host         *mmc = host->mmc;
 327         struct dentry           *root;
 328         struct dentry           *node;
 329
 330         root = mmc->debugfs_root;
 331         if (!root)
 332                 return;
 333
 334         node = debugfs_create_file("regs", S_IRUSR, root, host,&rk29_sdmmc_regs_fops);
 335         if (!node)
 336                 goto err;
 337
 338         node = debugfs_create_file("req", S_IRUSR, root, host, &rk29_sdmmc_req_fops);
 339         if (!node)
 340                 goto err;
 341
 342         node = debugfs_create_file("status", S_IRUSR, root, host, &rk29_sdmmc_status_fops);
 343         if (!node)
 344                 goto err;
 345
 346         return;
 347
 348 err:
 349         dev_err(&mmc->class_dev, "failed to initialize debugfs for host\n");
 350 }
 351 #endif
 352 static void rk29_sdmmc_show_info(struct rk29_sdmmc *host)
 353 {
 354         dev_info(host->dev, "state:   \t\t0x%08x\n", host->state);
 355         dev_info(host->dev, "pending_events:   \t0x%08lx\n", host->pending_events);
 356         dev_info(host->dev, "completed_events:   \t0x%08lx\n", host->completed_events);
 357         dev_info(host->dev, "mrq_status:   \t\t0x%08lx\n\n", host->mrq_status);
 358         dev_info(host->dev, "old_mrq_status:   \t0x%08lx\n\n", host->old_mrq_status);
 359         dev_info(host->dev, "SDMMC_CTRL:   \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CTRL));
 360         dev_info(host->dev, "SDMMC_PWREN:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_PWREN));
 361         dev_info(host->dev, "SDMMC_CLKDIV: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKDIV));
 362         dev_info(host->dev, "SDMMC_CLKSRC: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKSRC));
 363         dev_info(host->dev, "SDMMC_CLKENA: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CLKENA));
 364         dev_info(host->dev, "SDMMC_TMOUT:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TMOUT));
 365         dev_info(host->dev, "SDMMC_CTYPE:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CTYPE));
 366         dev_info(host->dev, "SDMMC_BLKSIZ: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_BLKSIZ));
 367         dev_info(host->dev, "SDMMC_BYTCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_BYTCNT));
 368         dev_info(host->dev, "SDMMC_INTMASK:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_INTMASK));
 369         dev_info(host->dev, "SDMMC_CMDARG: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CMDARG));
 370         dev_info(host->dev, "SDMMC_CMD:    \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CMD));
 371         dev_info(host->dev, "SDMMC_RESP0:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP0));
 372         dev_info(host->dev, "SDMMC_RESP1:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP1));
 373         dev_info(host->dev, "SDMMC_RESP2:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP2));
 374         dev_info(host->dev, "SDMMC_RESP3:  \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RESP3));
 375         dev_info(host->dev, "SDMMC_MINTSTS:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_MINTSTS));
 376         dev_info(host->dev, "SDMMC_RINTSTS:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_RINTSTS));
 377         dev_info(host->dev, "SDMMC_STATUS: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_STATUS));
 378         dev_info(host->dev, "SDMMC_FIFOTH: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_FIFOTH));
 379         dev_info(host->dev, "SDMMC_CDETECT:\t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_CDETECT));
 380         dev_info(host->dev, "SDMMC_WRTPRT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_WRTPRT));
 381         dev_info(host->dev, "SDMMC_TCBCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TCBCNT));
 382         dev_info(host->dev, "SDMMC_TBBCNT: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_TBBCNT));
 383         dev_info(host->dev, "SDMMC_DEBNCE: \t0x%08x\n", rk29_sdmmc_read(host->regs, SDMMC_DEBNCE));
 384 }
 385 static int rk29_sdmmc_reset_fifo(struct rk29_sdmmc *host)
 386 {
 387         int tmo;
 388         int retry = RK29_SDMMC_TMO_COUNT;
 389         if(!(rk29_sdmmc_read(host->regs, SDMMC_STATUS) & (SDMMC_STAUTS_MC_BUSY|SDMMC_STAUTS_DATA_BUSY)) &&
 390                 (rk29_sdmmc_read(host->regs, SDMMC_STATUS) & SDMMC_STAUTS_FIFO_EMPTY))
 391                 return 0;
 392
 393         while(retry--)
 394         {
 395                 tmo = RK29_SDMMC_TMO_COUNT;
 396                 rk29_sdmmc_write(host->regs, SDMMC_CTRL, rk29_sdmmc_read(host->regs, SDMMC_CTRL) | SDMMC_CTRL_FIFO_RESET);
 397                 while (--tmo && rk29_sdmmc_read(host->regs, SDMMC_CTRL) & SDMMC_CTRL_FIFO_RESET);
 398                 if(rk29_sdmmc_read(host->regs, SDMMC_STATUS) & (SDMMC_STAUTS_MC_BUSY|SDMMC_STAUTS_DATA_BUSY))
 399                         udelay(5);
 400                 else
 401                         break;
 402         }
 403         if(retry <= 0){
 404                 dev_dbg(host->dev, "%s error\n", __func__);
 405                 return -1;
 406         }
 407         else
 408                 return 0;
 409 }
 410 static int rk29_sdmmc_reset_ctrl(struct rk29_sdmmc *host)
 411 {
 412         int tmo = RK29_SDMMC_TMO_COUNT;
 413         /*
 414         if(!(rk29_sdmmc_read(host->regs, SDMMC_STATUS) & (SDMMC_STAUTS_MC_BUSY|SDMMC_STAUTS_DATA_BUSY)))
 415                 return 0;
 416         */
 417         rk29_sdmmc_write(host->regs, SDMMC_CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET));
 418         while (--tmo && rk29_sdmmc_read(host->regs, SDMMC_CTRL) & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET));
 419         rk29_sdmmc_write(host->regs, SDMMC_CTRL, rk29_sdmmc_read(host->regs, SDMMC_CTRL) | SDMMC_CTRL_INT_ENABLE);
 420
 421         if(tmo > 0) {
 422                 rk29_sdmmc_set_mrq_status(host, MRQ_RESET_CTRL_DONE);
 423                 host->is_init = 1;
 424                 return 0;
 425         }
 426         else {
 427                 rk29_sdmmc_set_mrq_status(host, MRQ_RESET_CTRL_ERR);
 428                 dev_err(host->dev, "%s error\n", __func__);
 429                 return -1;
 430         }
 431 }
 432
 433 static int rk29_sdmmc_start_command(struct rk29_sdmmc *host,
 434                 struct mmc_command *cmd, u32 cmd_flags)
 435 {
 436         int tmo = RK29_SDMMC_TMO_COUNT;
 437         unsigned long flags;
 438
 439         local_irq_save(flags);
 440
 441         rk29_sdmmc_write(host->regs, SDMMC_CMDARG, cmd->arg);
 442         rk29_sdmmc_write(host->regs, SDMMC_CMD, cmd_flags | SDMMC_CMD_START);
 443         local_irq_restore(flags);
 444
 445         while (--tmo && rk29_sdmmc_read(host->regs, SDMMC_CMD) & SDMMC_CMD_START)
 446                 cpu_relax();
 447         if(tmo > 0)
 448                 return 0;
 449         else
 450                 return -1;
 451 }
 452
 453 static int send_stop_cmd(struct rk29_sdmmc *host)
 454 {
 455         dev_dbg(host->dev,"start cmd:%d ARGR=0x%08x CMDR=0x%08x\n",
 456                                                 host->mrq->data->stop->opcode, host->mrq->data->stop->arg, host->stop_cmdr);
 457         if(rk29_sdmmc_start_command(host, host->mrq->data->stop, host->stop_cmdr)) {
 458                 rk29_sdmmc_set_mrq_status(host, MRQ_STOP_START_TMO);
 459                 return -1;
 460         }
 461         else {
 462                 rk29_sdmmc_set_mrq_status(host, MRQ_STOP_START_DONE);
 463                 return 0;
 464         }
 465 }
 466 static void rk29_sdmmc_dma_cleanup(struct rk29_sdmmc *host)
 467 {
 468         struct mmc_data *data = host->mrq->data;
 469         if (data)
 470                 dma_unmap_sg(host->dev, data->sg, data->sg_len,
 471                      ((data->flags & MMC_DATA_WRITE)
 472                       ? DMA_TO_DEVICE : DMA_FROM_DEVICE));
 473 }
 474
 475 static void rk29_sdmmc_stop_dma(struct rk29_sdmmc *host)
 476 {
 477         int ret = 0;
 478         rk29_sdmmc_set_mrq_status(host, MRQ_STOP_DMA);
 479         rk29_sdmmc_dma_cleanup(host);
 480         ret = rk29_dma_ctrl(host->dma_info.chn,RK29_DMAOP_STOP);
 481         if(ret < 0)
 482                         dev_err(host->dev, "stop dma:rk29_dma_ctrl stop error\n");
 483         ret = rk29_dma_ctrl(host->dma_info.chn,RK29_DMAOP_FLUSH);
 484         if(ret < 0)
 485                         dev_err(host->dev, "stop dma:rk29_dma_ctrl flush error\n");
 486         rk29_sdmmc_write(host->regs, SDMMC_CTRL,
 487                         (rk29_sdmmc_read(host->regs, SDMMC_CTRL))&(~SDMMC_CTRL_DMA_ENABLE));
 488 }
 489
 490 static void rk29_sdmmc_request_done(struct rk29_sdmmc *host,struct mmc_request  *mrq)
 491 {
 492         int tmo = RK29_SDMMC_TMO_COUNT;
 493
 494         spin_unlock(&host->lock);
 495         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, ~SDMMC_INT_SDIO);
 496         rk29_sdmmc_write(host->regs, SDMMC_INTMASK,
 497                 rk29_sdmmc_read(host->regs, SDMMC_INTMASK) &
 498                 ~(SDMMC_INT_CMD_DONE | SDMMC_INT_DTO | RK29_SDMMC_ERROR_FLAGS));
 499
 500         if(!rk29_sdmmc_test_mrq_status(host, MRQ_STOP_DMA) &&
 501                 rk29_sdmmc_test_mrq_status(host, MRQ_START_DMA))
 502                 rk29_sdmmc_stop_dma(host);
 503         if(mrq->stop && !rk29_sdmmc_test_mrq_status(host, MRQ_STOP_START_DONE))
 504                 send_stop_cmd(host);
 505         if(mrq->cmd->opcode == 17 && (host->data_intsts & SDMMC_INT_SBE)){
 506                 rk29_sdmmc_write(host->regs, SDMMC_CMD, 12|SDMMC_CMD_STOP | SDMMC_CMD_START);
 507                 while (--tmo && rk29_sdmmc_read(host->regs, SDMMC_CMD) & SDMMC_CMD_START);
 508         }
 509         if(rk29_sdmmc_read(host->regs, SDMMC_STATUS) & SDMMC_STAUTS_FIFO_FULL ){
 510                 rk29_sdmmc_read(host->regs, SDMMC_DATA);
 511                 rk29_sdmmc_read(host->regs, SDMMC_DATA);
 512         }
 513         //if(mrq->data && mrq->data->error)
 514                 rk29_sdmmc_reset_fifo(host);
 515
 516         host->mrq = NULL;
 517         host->state = STATE_IDLE;
 518         rk29_sdmmc_set_mrq_status(host, MRQ_REQUEST_DONE);
 519         mmc_request_done(host->mmc, mrq);
 520         del_timer(&host->monitor_timer);
 521
 522         spin_lock(&host->lock);
 523 }
 524
 525 static int sdmmc_send_cmd(struct rk29_sdmmc *host, unsigned int cmd, int arg)
 526 {
 527         int tmo = RK29_SDMMC_TMO_COUNT;
 528         rk29_sdmmc_write(host->regs, SDMMC_CMDARG, arg);
 529         rk29_sdmmc_write(host->regs, SDMMC_CMD, SDMMC_CMD_START | cmd);
 530         while (--tmo && readl(host->regs + SDMMC_CMD) & SDMMC_CMD_START);
 531         if(tmo > 0)
 532                 return 0;
 533         else
 534                 return -1;
 535 }
 536 static int rk29_sdmmc_get_div(unsigned int bus_hz, unsigned int ios_clock)
 537 {
 538      unsigned int div, real_clock;
 539
 540          if(ios_clock >= bus_hz)
 541                  return 0;
 542         for(div = 1; div < 255; div++)
 543         {
 544                 real_clock = bus_hz/(2*div);
 545                 if(real_clock <= ios_clock)
 546                         break;
 547         }
 548         if(div > 255)
 549                 div = 255;
 550         return div;
 551 }
 552
 553 int rk29_sdmmc_set_clock(struct rk29_sdmmc *host)
 554 {
 555         unsigned int div;
 556         if(!host->ios_clock)
 557                 return 0;
 558         //div  = (((host->bus_hz + (host->bus_hz / 5)) / host->ios_clock)) >> 1;
 559         //if(host->mrq && host->mrq->cmd->opcode == 25)
 560                 //host->ios_clock = 500000;
 561         div = rk29_sdmmc_get_div(host->bus_hz, host->ios_clock);
 562 /*
 563         if(div == 0)
 564                 div = 1;
 565 */
 566         if(host->div == div)
 567                 return 0;
 568         dev_info(host->dev, "div = %u, bus_hz = %u, ios_clock = %u\n",
 569                 div, host->bus_hz, host->ios_clock);
 570         rk29_sdmmc_write(host->regs, SDMMC_CLKENA, 0);
 571         rk29_sdmmc_write(host->regs, SDMMC_CLKSRC,0);
 572         if(sdmmc_send_cmd(host, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0))
 573                 goto send_cmd_err;
 574         rk29_sdmmc_write(host->regs, SDMMC_CLKDIV, div);
 575         host->div = div;
 576         host->clock = (div == 0)? host->bus_hz :(host->bus_hz / div) >> 1;
 577         if(sdmmc_send_cmd(host, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0))
 578                 goto send_cmd_err;
 579         rk29_sdmmc_write(host->regs, SDMMC_CLKENA, SDMMC_CLKEN_ENABLE);
 580         if(sdmmc_send_cmd(host, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0))
 581                 goto send_cmd_err;
 582
 583         rk29_sdmmc_set_mrq_status(host, MRQ_CLK_START_DONE);
 584         return 0;
 585 send_cmd_err:
 586         rk29_sdmmc_set_mrq_status(host, MRQ_CLK_START_TMO);
 587         return -1;
 588 }
 589
 590 static void rk29_sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 591 {
 592         struct rk29_sdmmc *host = mmc_priv(mmc);;
 593
 594
 595         switch (ios->bus_width) {
 596         case MMC_BUS_WIDTH_1:
 597                 rk29_sdmmc_write(host->regs, SDMMC_CTYPE, 0);
 598                 break;
 599         case MMC_BUS_WIDTH_4:
 600                 rk29_sdmmc_write(host->regs, SDMMC_CTYPE, SDMMC_CTYPE_4BIT);
 601                 break;
 602         }
 603         host->ios_clock = ios->clock;
 604
 605         switch (ios->power_mode) {
 606         case MMC_POWER_UP:
 607                 host->is_init = 1;
 608                 rk29_sdmmc_write(host->regs, SDMMC_PWREN, 1);
 609                 break;
 610         default:
 611                 break;
 612         }
 613 }
 614
 615 static int rk29_sdmmc_get_ro(struct mmc_host *mmc)
 616 {
 617         struct rk29_sdmmc *host = mmc_priv(mmc);
 618         u32 wrtprt = rk29_sdmmc_read(host->regs, SDMMC_WRTPRT);
 619
 620         return (wrtprt & SDMMC_WRITE_PROTECT)?1:0;
 621 }
 622
 623
 624 static int rk29_sdmmc_get_cd(struct mmc_host *mmc)
 625 {
 626         struct rk29_sdmmc *host = mmc_priv(mmc);
 627
 628         if(host->is_sdio)
 629                 return host->get_wifi_cd(mmc_dev(host->mmc));
 630         else if(host->gpio_det == INVALID_GPIO)
 631                 return 1;
 632         else
 633                 return gpio_get_value(host->gpio_det)?0:1;
 634 }
 635
 636 static inline unsigned ns_to_clocks(unsigned clkrate, unsigned ns)
 637 {
 638         u32 clks;
 639         if (clkrate > 1000000)
 640                 clks =  (ns * (clkrate / 1000000) + 999) / 1000;
 641         else
 642                 clks =  ((ns/1000) * (clkrate / 1000) + 999) / 1000;
 643
 644         return clks;
 645 }
 646
 647 static void rk29_sdmmc_set_timeout(struct rk29_sdmmc *host,struct mmc_data *data)
 648 {
 649         unsigned timeout;
 650         unsigned int clock;
 651
 652         if(host->div == -1)
 653                 return;
 654         else if(host->div == 0)
 655                 clock = host->bus_hz;
 656         else
 657                 clock = (host->bus_hz / host->div) >> 1;
 658         timeout = ns_to_clocks(clock, data->timeout_ns) + data->timeout_clks;
 659         rk29_sdmmc_write(host->regs, SDMMC_TMOUT, 0xffffffff);
 660         //rk29_sdmmc_write(host->regs, SDMMC_TMOUT, (timeout << 8) | (70));
 661 }
 662 static u32 rk29_sdmmc_prepare_command(struct mmc_host *mmc,
 663                                  struct mmc_command *cmd)
 664 {
 665         struct mmc_data *data;
 666         u32             cmdr;
 667
 668         cmd->error = -EINPROGRESS;
 669         cmdr = cmd->opcode;
 670
 671         if(cmdr == 12)
 672                 cmdr |= SDMMC_CMD_STOP;
 673         else if(cmdr == 13)
 674                 cmdr &= ~SDMMC_CMD_PRV_DAT_WAIT;
 675         else
 676                 cmdr |= SDMMC_CMD_PRV_DAT_WAIT;
 677
 678         if (cmd->flags & MMC_RSP_PRESENT) {
 679                 cmdr |= SDMMC_CMD_RESP_EXP; // expect the respond, need to set this bit
 680                 if (cmd->flags & MMC_RSP_136)
 681                         cmdr |= SDMMC_CMD_RESP_LONG; // expect long respond
 682
 683                 if(cmd->flags & MMC_RSP_CRC)
 684                         cmdr |= SDMMC_CMD_RESP_CRC;
 685         }
 686
 687         data = cmd->data;
 688         if (data) {
 689                 cmdr |= SDMMC_CMD_DAT_EXP;
 690                 if (data->flags & MMC_DATA_STREAM)
 691                         cmdr |= SDMMC_CMD_STRM_MODE; //  set stream mode
 692                 if (data->flags & MMC_DATA_WRITE)
 693                     cmdr |= SDMMC_CMD_DAT_WR;
 694         }
 695         return cmdr;
 696 }
 697 static int rk29_sdmmc_submit_data(struct rk29_sdmmc *host, struct mmc_data *data)
 698 {
 699         struct scatterlist              *sg;
 700         unsigned int                    i,direction;
 701         int dma_len=0, ret = 0;
 702
 703         if (data->blksz & 3){
 704                 dev_info(host->dev, "data->blksz = %d\n", data->blksz);
 705                 return -EINVAL;
 706         }
 707         for_each_sg(data->sg, sg, data->sg_len, i) {
 708                 if (sg->offset & 3 || sg->length & 3){
 709                         dev_info(host->dev, "sg->offset = %d, sg->length = %d\n",
 710                                 sg->offset, sg->length);
 711                         return -EINVAL;
 712                 }
 713         }
 714         if (data->flags & MMC_DATA_READ)
 715                 direction = RK29_DMASRC_HW;
 716         else
 717                 direction = RK29_DMASRC_MEM;
 718
 719         ret = rk29_dma_ctrl(host->dma_info.chn,RK29_DMAOP_STOP);
 720         if(ret < 0)
 721                         dev_err(host->dev, "rk29_dma_ctrl stop error\n");
 722         ret = rk29_dma_ctrl(host->dma_info.chn,RK29_DMAOP_FLUSH);
 723         if(ret < 0)
 724                         dev_err(host->dev, "rk29_dma_ctrl flush error\n");
 725     ret = rk29_dma_devconfig(host->dma_info.chn, direction, (unsigned long )(host->dma_addr));
 726         if(ret < 0)
 727                         dev_err(host->dev, "rk29_dma_devconfig error\n");
 728         dma_len = dma_map_sg(host->dev, data->sg, data->sg_len,
 729                         (data->flags & MMC_DATA_READ)? DMA_FROM_DEVICE : DMA_TO_DEVICE);
 730         for (i = 0; i < dma_len; i++) {
 731         ret = rk29_dma_enqueue(host->dma_info.chn, host, sg_dma_address(&data->sg[i]),sg_dma_len(&data->sg[i]));  // data->sg->dma_address, data->sg->length);
 732                 if(ret < 0)
 733                         dev_err(host->dev, "rk29 dma enqueue error\n");
 734         }
 735         rk29_sdmmc_write(host->regs, SDMMC_CTRL, (rk29_sdmmc_read(host->regs, SDMMC_CTRL))|SDMMC_CTRL_DMA_ENABLE);// enable dma
 736         ret = rk29_dma_ctrl(host->dma_info.chn, RK29_DMAOP_START);
 737         if(ret < 0)
 738                         dev_err(host->dev, "rk29_dma_ctrl start error\n");
 739         rk29_sdmmc_set_mrq_status(host, MRQ_START_DMA);
 740         return 0;
 741 }
 742 static int rk29_sdmmc_test_cmd_start(struct rk29_sdmmc *host)
 743 {
 744         return rk29_sdmmc_read(host->regs, SDMMC_CMD) & SDMMC_CMD_START;
 745 }
 746 static int rk29_sdmmc_start_request(struct rk29_sdmmc *host,struct mmc_request *mrq)
 747 {
 748         int ret = 0;
 749         struct mmc_command      *cmd;
 750         u32     cmdflags;
 751
 752         BUG_ON(host->state != STATE_IDLE);
 753
 754         spin_lock(&host->lock);
 755
 756         if(rk29_sdmmc_test_cmd_start(host)){
 757                 dev_info(host->dev, "cmd_start bit is set ,reset ctroller\n");
 758                 ret = rk29_sdmmc_reset_ctrl(host);
 759         }
 760         if(ret < 0)
 761                 goto start_err;
 762
 763         host->state = STATE_SENDING_CMD;
 764
 765         if (mrq->data) {
 766                 rk29_sdmmc_set_timeout(host,mrq->data);
 767                 rk29_sdmmc_write(host->regs, SDMMC_BYTCNT,mrq->data->blksz*mrq->data->blocks);
 768                 rk29_sdmmc_write(host->regs, SDMMC_BLKSIZ,mrq->data->blksz);
 769         }
 770         cmd = mrq->cmd;
 771         cmdflags = rk29_sdmmc_prepare_command(host->mmc, cmd);
 772         if (host->is_init) {
 773                 host->is_init = 0;
 774             cmdflags |= SDMMC_CMD_INIT;
 775         }
 776
 777         if (mrq->data) {
 778                 rk29_sdmmc_set_mrq_status(host, MRQ_HAS_DATA);
 779                 ret = rk29_sdmmc_submit_data(host, mrq->data);
 780         }
 781         if(ret < 0) {
 782                 rk29_sdmmc_set_mrq_status(host, MRQ_DMA_SET_ERR);
 783                 goto start_err;
 784         }
 785         dev_dbg(host->dev,"start cmd:%d ARGR=0x%08x CMDR=0x%08x\n",
 786                                                 cmd->opcode, cmd->arg, cmdflags);
 787
 788         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, ~SDMMC_INT_SDIO);
 789         rk29_sdmmc_write(host->regs, SDMMC_INTMASK,
 790                 rk29_sdmmc_read(host->regs, SDMMC_INTMASK) |
 791                 (SDMMC_INT_CMD_DONE | SDMMC_INT_DTO | RK29_SDMMC_ERROR_FLAGS));
 792         ret = rk29_sdmmc_start_command(host, cmd, cmdflags);
 793         if(ret < 0) {
 794                 rk29_sdmmc_set_mrq_status(host, MRQ_CMD_START_TMO);
 795                 goto start_err;
 796         }
 797         rk29_sdmmc_set_mrq_status(host, MRQ_CMD_START_DONE);
 798         if (mrq->stop) {
 799                 rk29_sdmmc_set_mrq_status(host, MRQ_HAS_STOP);
 800                 host->stop_cmdr = rk29_sdmmc_prepare_command(host->mmc, mrq->stop);
 801                 if(mrq->cmd->opcode == 25)
 802                         host->stop_cmdr |= SDMMC_CMD_DAT_WR;
 803         }
 804         spin_unlock(&host->lock);
 805         return 0;
 806 start_err:
 807         spin_unlock(&host->lock);
 808         return ret;
 809 }
 810
 811 static void rk29_sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 812 {
 813         int timeout;
 814         struct rk29_sdmmc *host = mmc_priv(mmc);
 815
 816         if(!mrq)
 817                 dev_info(host->dev, "mrq = NULL!!!!!\n");
 818         if(host->mrq){
 819                                 dev_info(host->dev, "%s-> host->mrq = NULL\n", __func__);
 820                                 rk29_sdmmc_show_info(host);
 821                         }
 822         if((!rk29_sdmmc_test_mrq_status(host, MRQ_STOP_DMA) &&
 823                 rk29_sdmmc_test_mrq_status(host, MRQ_START_DMA)) ||
 824                 (rk29_sdmmc_test_mrq_status(host, MRQ_STOP_DMA) &&
 825                 !rk29_sdmmc_test_mrq_status(host, MRQ_START_DMA)))
 826                 dev_warn(host->dev, "start_dma but no stop_dma, or no start_dma but stop_dma\n");
 827         WARN_ON(host->mrq);
 828         host->old_mrq_status = host->mrq_status;
 829         host->mrq_status = 0;
 830         host->pending_events = 0;
 831         host->completed_events= 0;
 832         host->cmd_intsts = 0;
 833         host->data_intsts = 0;
 834         host->mrq = mrq;
 835
 836         if(!mrq->data)
 837                 timeout = 5000;
 838         else
 839                 timeout = 5000 + mrq->data->timeout_ns/1000000;
 840         mod_timer(&host->monitor_timer, jiffies + msecs_to_jiffies(timeout));
 841
 842         if (!rk29_sdmmc_get_cd(mmc)) {
 843                 mrq->cmd->error = -ENOMEDIUM;
 844                 rk29_sdmmc_request_done(host, mrq);
 845                 dev_dbg(host->dev, "mrq_status = 0x%08lx\n", host->mrq_status);
 846                 return;
 847         }
 848
 849         if(rk29_sdmmc_set_clock(host)) {
 850                 mrq->cmd->error = -EINPROGRESS;
 851                 dev_info(host->dev, "rk29_sdmmc_set_clock timeout, ios_clock = %d, clock = %d\n", host->ios_clock, host->clock);
 852                 rk29_sdmmc_request_done(host, mrq);
 853                 rk29_sdmmc_reset_ctrl(host);
 854                 rk29_sdmmc_show_info(host);
 855                 return;
 856         }
 857         if(rk29_sdmmc_start_request(host,mrq)) {
 858                 dev_info(host->dev, "rk29_sdmmc_start_request timeout\n");
 859                 mrq->cmd->error = -EINPROGRESS;
 860                 rk29_sdmmc_request_done(host, mrq);
 861                 rk29_sdmmc_reset_ctrl(host);
 862                 rk29_sdmmc_show_info(host);
 863         }
 864         return;
 865 }
 866
 867 static void rk29_sdmmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 868 {
 869         u32 intmask;
 870         unsigned long flags;
 871         struct rk29_sdmmc *host = mmc_priv(mmc);
 872
 873         spin_lock_irqsave(&host->lock, flags);
 874         intmask = rk29_sdmmc_read(host->regs, SDMMC_INTMASK);
 875         if(enable)
 876                 rk29_sdmmc_write(host->regs, SDMMC_INTMASK, intmask | SDMMC_INT_SDIO);
 877         else
 878                 rk29_sdmmc_write(host->regs, SDMMC_INTMASK, intmask & ~SDMMC_INT_SDIO);
 879         spin_unlock_irqrestore(&host->lock, flags);
 880 }
 881
 882 static void  rk29_sdmmc_init_card(struct mmc_host *mmc, struct mmc_card *card)
 883 {
 884         card->quirks = MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 885
 886 }
 887 static const struct mmc_host_ops rk29_sdmmc_ops[] = {
 888         {
 889                 .request        = rk29_sdmmc_request,
 890                 .set_ios        = rk29_sdmmc_set_ios,
 891                 .get_ro         = rk29_sdmmc_get_ro,
 892                 .get_cd         = rk29_sdmmc_get_cd,
 893         },
 894         {
 895                 .request        = rk29_sdmmc_request,
 896                 .set_ios        = rk29_sdmmc_set_ios,
 897                 .enable_sdio_irq = rk29_sdmmc_enable_sdio_irq,
 898         .init_card       = rk29_sdmmc_init_card,
 899         },
 900 };
 901
 902 static void rk29_sdmmc_request_end(struct rk29_sdmmc *host)
 903         __releases(&host->lock)
 904         __acquires(&host->lock)
 905 {
 906         if(host->mrq)
 907                 rk29_sdmmc_request_done(host, host->mrq);
 908 }
 909
 910 static void rk29_sdmmc_command_complete(struct rk29_sdmmc *host,
 911         struct mmc_command *cmd)
 912 {
 913         unsigned int intsts = host->cmd_intsts;
 914
 915         host->cmd_intsts = 0;
 916         if(cmd->flags & MMC_RSP_PRESENT) {
 917
 918             if(cmd->flags & MMC_RSP_136) {
 919                 cmd->resp[3] = rk29_sdmmc_read(host->regs, SDMMC_RESP0);
 920                 cmd->resp[2] = rk29_sdmmc_read(host->regs, SDMMC_RESP1);
 921                 cmd->resp[1] = rk29_sdmmc_read(host->regs, SDMMC_RESP2);
 922                 cmd->resp[0] = rk29_sdmmc_read(host->regs, SDMMC_RESP3);
 923             } else {
 924                 cmd->resp[0] = rk29_sdmmc_read(host->regs, SDMMC_RESP0);
 925                         cmd->resp[1] = 0;
 926                         cmd->resp[2] = 0;
 927                         cmd->resp[3] = 0;
 928             }
 929         }
 930
 931         if (intsts & SDMMC_INT_RTO)
 932                 cmd->error = -ETIMEDOUT;
 933         else if ((cmd->flags & MMC_RSP_CRC) && (intsts & SDMMC_INT_RCRC))
 934                 cmd->error = -EILSEQ;
 935         else if (intsts & SDMMC_INT_RE)
 936                 cmd->error = -EIO;
 937         else if(intsts & SDMMC_INT_HLE)
 938                 cmd->error = -EIO;
 939         else
 940                 cmd->error = 0;
 941
 942         if (cmd->error) {
 943                 dev_dbg(host->dev,
 944                         "command error: status=0x%08x resp=0x%08x\n"
 945                         "cmd=0x%08x arg=0x%08x flg=0x%08x err=%d\n",
 946                         intsts, cmd->resp[0],
 947                         cmd->opcode, cmd->arg, cmd->flags, cmd->error);
 948
 949                 if (cmd->data) {
 950                         rk29_sdmmc_stop_dma(host);
 951                 }
 952         }
 953 }
 954
 955 static void rk29_sdmmc_tasklet_func(unsigned long priv)
 956 {
 957         struct rk29_sdmmc       *host = (struct rk29_sdmmc *)priv;
 958         enum rk29_sdmmc_state   state;
 959         enum rk29_sdmmc_state   prev_state;
 960         unsigned int                    intsts;
 961
 962         spin_lock(&host->lock);
 963         state = host->state;
 964
 965         do {
 966                 prev_state = state;
 967                 switch (state) {
 968                 case STATE_IDLE:
 969                         break;
 970
 971                 case STATE_SENDING_CMD:
 972                         if (!rk29_sdmmc_test_and_clear_pending(host,
 973                                                 EVENT_CMD_COMPLETE))
 974                                 break;
 975                         rk29_sdmmc_set_completed(host, EVENT_CMD_COMPLETE);
 976                         if(!host->mrq){
 977                                 dev_info(host->dev, "sending cmd, host->mrq = NULL\n");
 978                                 rk29_sdmmc_show_info(host);
 979                         }else{
 980                                 rk29_sdmmc_command_complete(host, host->mrq->cmd);
 981                                 if (!host->mrq->data || (host->mrq->cmd->error)) {
 982                                         rk29_sdmmc_request_end(host);
 983                                         goto unlock;
 984                                 }
 985                         prev_state = state = STATE_SENDING_DATA;
 986                         }
 987                 case STATE_SENDING_DATA:
 988                         if (rk29_sdmmc_test_and_clear_pending(host,
 989                                                 EVENT_DATA_ERROR)) {
 990                                 if(!host->mrq){
 991                                         dev_info(host->dev, "sending data, host->mrq = NULL\n");
 992                                         rk29_sdmmc_show_info(host);
 993                                 }
 994                                 if(!rk29_sdmmc_test_mrq_status(host, MRQ_DMA_DONE) &&
 995                 rk29_sdmmc_test_mrq_status(host, MRQ_START_DMA))
 996                         dev_info(host->dev, "dma is running...\n");
 997                                 rk29_sdmmc_stop_dma(host);
 998                                 if (host->mrq->data->stop)
 999                                         send_stop_cmd(host);
1000                                 state = STATE_DATA_ERROR;
1001                                 break;
1002                         }
1003                         prev_state = state = STATE_DATA_BUSY;
1004
1005                 case STATE_DATA_BUSY:
1006                         if (!rk29_sdmmc_test_and_clear_pending(host,EVENT_DATA_COMPLETE) &&
1007                                 !(host->data_intsts & SDMMC_INT_SBE))
1008                                 break;
1009
1010                         rk29_sdmmc_set_completed(host, EVENT_DATA_COMPLETE);
1011                         intsts = host->data_intsts;
1012                         if(!host->mrq){
1013                                 dev_info(host->dev, "%s-> host->mrq = NULL\n", __func__);
1014                                 rk29_sdmmc_show_info(host);
1015                         }
1016                         if(host->mrq->data) {
1017                                 if (unlikely(intsts & RK29_SDMMC_DATA_ERROR_FLAGS)) {
1018                                         if (intsts & SDMMC_INT_DRTO) {
1019                                                 dev_err(host->dev,"data timeout error\n");
1020                                                 host->mrq->data->error = -ETIMEDOUT;
1021                                         } else if (intsts & SDMMC_INT_DCRC) {
1022                                                 dev_err(host->dev,"data CRC error\n");
1023                                                 host->mrq->data->error = -EILSEQ;
1024                                         } else if (intsts & SDMMC_INT_SBE) {
1025                                                 dev_err(host->dev,"data start bit error\n");
1026                                                 host->mrq->data->error = -EILSEQ;
1027                                         }else {
1028                                                 dev_err(host->dev,"data FIFO error (status=%08x)\n",intsts);
1029                                                 host->mrq->data->error = -EIO;
1030                                         }
1031                                         rk29_sdmmc_show_info(host);
1032                                 }else {
1033                                         host->mrq->data->bytes_xfered = host->mrq->data->blocks * host->mrq->data->blksz;
1034                                         host->mrq->data->error = 0;
1035                                 }
1036                         }
1037                         if (!host->mrq->data->stop) {
1038                                 rk29_sdmmc_request_end(host);
1039                                 goto unlock;
1040                         }
1041
1042                         prev_state = state = STATE_SENDING_STOP;
1043                         if (host->mrq->data && !host->mrq->data->error)
1044                                 send_stop_cmd(host);
1045                         /* fall through */
1046
1047                 case STATE_SENDING_STOP:
1048                         if (!rk29_sdmmc_test_and_clear_pending(host,
1049                                                 EVENT_CMD_COMPLETE))
1050                                 break;
1051                         if(!host->mrq){
1052                                 dev_info(host->dev, "%s-> host->mrq = NULL\n", __func__);
1053                                 rk29_sdmmc_show_info(host);
1054                         }
1055                         if(host->mrq->stop)
1056                                 rk29_sdmmc_command_complete(host, host->mrq->stop);
1057                         rk29_sdmmc_request_end(host);
1058                         goto unlock;
1059                 case STATE_DATA_ERROR:
1060                         state = STATE_DATA_BUSY;
1061                         break;
1062                 }
1063         } while (state != prev_state);
1064
1065         host->state = state;
1066
1067 unlock:
1068         spin_unlock(&host->lock);
1069
1070 }
1071
1072
1073
1074 static irqreturn_t rk29_sdmmc_isr(int irq, void *dev_id)
1075 {
1076         struct rk29_sdmmc *host = dev_id;
1077         unsigned int intsts;
1078
1079         intsts = rk29_sdmmc_read(host->regs, SDMMC_MINTSTS);
1080
1081         spin_lock(&host->lock);
1082         if(intsts & RK29_SDMMC_CMD_ERROR_FLAGS) {
1083                 rk29_sdmmc_set_mrq_status(host, MRQ_INT_CMD_ERR);
1084             rk29_sdmmc_write(host->regs, SDMMC_RINTSTS,RK29_SDMMC_CMD_ERROR_FLAGS);
1085             host->cmd_intsts = intsts;
1086             smp_wmb();
1087             rk29_sdmmc_set_pending(host, EVENT_CMD_COMPLETE);
1088                 if(!host->mrq){
1089                                 dev_info(host->dev, "%s-> host->mrq = NULL\n", __func__);
1090                                 rk29_sdmmc_show_info(host);
1091                         }
1092                 else
1093                         dev_info(host->dev, "[cmd%d] cmd error(intsts 0x%x, host->state %d, pending_events %ld)\n",
1094                                 host->mrq->cmd->opcode,intsts,host->state,host->pending_events);
1095                 tasklet_schedule(&host->tasklet);
1096         }
1097
1098         if (intsts & RK29_SDMMC_DATA_ERROR_FLAGS) {
1099                 rk29_sdmmc_set_mrq_status(host, MRQ_INT_DATA_ERR);
1100                 rk29_sdmmc_write(host->regs, SDMMC_RINTSTS,RK29_SDMMC_DATA_ERROR_FLAGS);
1101                 host->data_intsts = intsts;
1102                 smp_wmb();
1103                 rk29_sdmmc_set_pending(host, EVENT_DATA_ERROR);
1104                 if(!host->mrq){
1105                                 dev_info(host->dev, "%s-> host->mrq = NULL\n", __func__);
1106                                 rk29_sdmmc_show_info(host);
1107                         }
1108                 else
1109                         dev_info(host->dev, "[cmd%d] data error(intsts 0x%x, host->state %d, pending_events %ld)\n",
1110                                 host->mrq->cmd->opcode, intsts,host->state,host->pending_events);
1111                 tasklet_schedule(&host->tasklet);
1112         }
1113
1114         if(intsts & SDMMC_INT_DTO) {
1115                 rk29_sdmmc_set_mrq_status(host, MRQ_INT_DATA_DONE);
1116             rk29_sdmmc_write(host->regs, SDMMC_RINTSTS,SDMMC_INT_DTO);
1117             if (!host->data_intsts)
1118                         host->data_intsts = intsts;
1119             smp_wmb();
1120             rk29_sdmmc_set_pending(host, EVENT_DATA_COMPLETE);
1121             tasklet_schedule(&host->tasklet);
1122         }
1123         if (intsts & SDMMC_INT_CMD_DONE) {
1124                 rk29_sdmmc_set_mrq_status(host, MRQ_INT_CMD_DONE);
1125             rk29_sdmmc_write(host->regs, SDMMC_RINTSTS,SDMMC_INT_CMD_DONE);
1126             if(!host->cmd_intsts)
1127                         host->cmd_intsts = intsts;
1128
1129                 smp_wmb();
1130                 rk29_sdmmc_set_pending(host, EVENT_CMD_COMPLETE);
1131                 tasklet_schedule(&host->tasklet);
1132         }
1133         if(host->is_sdio && (intsts & SDMMC_INT_SDIO)) {
1134                 rk29_sdmmc_set_mrq_status(host, MRQ_INT_SDIO);
1135                 rk29_sdmmc_write(host->regs, SDMMC_RINTSTS,SDMMC_INT_SDIO);
1136                 mmc_signal_sdio_irq(host->mmc);
1137         }
1138         spin_unlock(&host->lock);
1139         return IRQ_HANDLED;
1140 }
1141
1142 static void rk29_sdmmc_dma_complete(void *arg, int size, enum rk29_dma_buffresult result)
1143 {
1144         struct rk29_sdmmc       *host = arg;
1145
1146         dev_dbg(host->dev, "DMA complete\n");
1147         rk29_sdmmc_set_mrq_status(host, MRQ_DMA_DONE);
1148 }
1149
1150 static void rk29_sdmmc_detect_change(struct rk29_sdmmc *host)
1151 {
1152         spin_lock(&host->lock);
1153
1154         del_timer(&host->monitor_timer);
1155         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, ~SDMMC_INT_SDIO);
1156         rk29_sdmmc_write(host->regs, SDMMC_INTMASK,
1157                 rk29_sdmmc_read(host->regs, SDMMC_INTMASK) &
1158                 ~(SDMMC_INT_CMD_DONE | SDMMC_INT_DTO | RK29_SDMMC_ERROR_FLAGS));
1159         if (host->mrq) {
1160                 switch (host->state) {
1161                 case STATE_IDLE:
1162                         break;
1163                 case STATE_SENDING_CMD:
1164                         if(host->mrq->cmd)
1165                                 host->mrq->cmd->error = -ENOMEDIUM;
1166                         if (!host->mrq->data)
1167                                 break;
1168                         /* fall through */
1169                 case STATE_SENDING_DATA:
1170                         if(host->mrq->data)
1171                                 host->mrq->data->error = -ENOMEDIUM;
1172                         rk29_sdmmc_stop_dma(host);
1173                         break;
1174                 case STATE_DATA_BUSY:
1175                 case STATE_DATA_ERROR:
1176                         if (host->mrq->data && host->mrq->data->error == -EINPROGRESS)
1177                                 host->mrq->data->error = -ENOMEDIUM;
1178                         if (!host->mrq->stop)
1179                                 break;
1180                         /* fall through */
1181                 case STATE_SENDING_STOP:
1182                         if(host->mrq->stop) {
1183                                 host->mrq->stop->error = -ENOMEDIUM;
1184                         }
1185                         break;
1186                 }
1187                 rk29_sdmmc_request_end(host);
1188         }
1189         rk29_sdmmc_reset_fifo(host);
1190         spin_unlock(&host->lock);
1191         mmc_detect_change(host->mmc, 0);
1192 }
1193
1194 static void rk29_sdmmc1_status_notify_cb(int card_present, void *dev_id)
1195 {
1196     struct rk29_sdmmc *host = dev_id;
1197
1198     card_present = rk29_sdmmc_get_cd(host->mmc);
1199     dev_info(host->dev, "sdio change detected,status is %d\n",card_present);
1200
1201     rk29_sdmmc_detect_change(host);
1202 }
1203
1204 static void rk29_sdmmc_get_dma_dma_info(struct rk29_sdmmc *host)
1205 {
1206         if(host->is_sdio)
1207                 host->dma_info = dma_infos[1];
1208         else
1209                 host->dma_info = dma_infos[0];
1210 }
1211
1212 static irqreturn_t rk29_sdmmc_detect_change_isr(int irq, void *dev_id);
1213 static void rk29_sdmmc_detect_change_work(struct work_struct *work)
1214 {
1215         int ret;
1216     struct rk29_sdmmc *host =  container_of(work, struct rk29_sdmmc, work.work);
1217
1218         dev_info(host->dev, "sd detect change, card is %s\n",
1219                 rk29_sdmmc_get_cd(host->mmc)?"inserted":"removed");
1220         if(host->enable_sd_warkup && rk29_sdmmc_get_cd(host->mmc))
1221                 rk28_send_wakeup_key();
1222         rk29_sdmmc_detect_change(host);
1223
1224         free_irq(host->gpio_irq, host);
1225         ret = request_irq(host->gpio_irq,
1226                                  rk29_sdmmc_detect_change_isr,
1227                          rk29_sdmmc_get_cd(host->mmc)?IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING,
1228                          "sd_detect",
1229                          host);
1230         if(ret < 0)
1231                 dev_err(host->dev, "gpio request_irq error\n");
1232 }
1233 static irqreturn_t rk29_sdmmc_detect_change_isr(int irq, void *dev_id)
1234 {
1235         struct rk29_sdmmc *host = dev_id;
1236
1237         disable_irq_nosync(host->gpio_irq);
1238         if(rk29_sdmmc_get_cd(host->mmc))
1239                 schedule_delayed_work(&host->work, msecs_to_jiffies(500));
1240         else
1241                 schedule_delayed_work(&host->work, 0);
1242
1243         return IRQ_HANDLED;
1244 }
1245 static void rk29_sdmmc_monitor_timer(unsigned long data)
1246 {
1247         struct rk29_sdmmc *host = (struct rk29_sdmmc *)data;
1248
1249         if(!rk29_sdmmc_test_mrq_status(host, MRQ_REQUEST_DONE)){
1250                 dev_info(host->dev, "no dto interrupt\n");
1251                 rk29_sdmmc_show_info(host);
1252                 host->mrq->cmd->error = -ETIMEDOUT;
1253                 if(host->mrq->data)
1254                         host->mrq->data->error = -ETIMEDOUT;
1255                 rk29_sdmmc_request_end(host);
1256                 //rk29_sdmmc_reset_ctrl(host);
1257         }
1258
1259 }
1260
1261 #ifdef CONFIG_HAS_EARLYSUSPEND
1262 static void rk29_sdmmc_early_suspend(struct early_suspend *h)
1263 {
1264         struct rk29_sdmmc *host = container_of(h,
1265                                                         struct rk29_sdmmc,
1266                                                         early_suspend);
1267
1268         dev_dbg(host->dev, "Enter rk29_sdmmc_early_suspend\n");
1269 }
1270
1271 static void rk29_sdmmc_early_resume(struct early_suspend *h)
1272 {
1273         struct rk29_sdmmc *host = container_of(h,
1274                                                         struct rk29_sdmmc,
1275                                                         early_suspend);
1276
1277         dev_dbg(host->dev, "Exit rk29_sdmmc_early_resume\n");
1278 }
1279 #endif
1280
1281
1282 static int rk29_sdmmc_probe(struct platform_device *pdev)
1283 {
1284         struct mmc_host                 *mmc;
1285         struct rk29_sdmmc               *host;
1286         struct resource                 *regs;
1287         struct rk29_sdmmc_platform_data *pdata;
1288         int                             ret = 0;
1289
1290         pdata = pdev->dev.platform_data;
1291         if (!pdata) {
1292                 dev_err(&pdev->dev, "Platform data missing\n");
1293                 return -ENODEV;
1294         }
1295         if(pdata->io_init)
1296                 pdata->io_init();
1297
1298         mmc = mmc_alloc_host(sizeof(struct rk29_sdmmc), &pdev->dev);
1299         if (!mmc)
1300                 return -ENOMEM;
1301
1302         host = mmc_priv(mmc);
1303         host->mmc = mmc;
1304         host->dev = &pdev->dev;
1305         host->mrq = NULL;
1306         host->state = STATE_IDLE;
1307         host->div = -1;
1308         host->is_init = 1;
1309         host->is_sdio = rk29_sdmmc_is_sdio(pdata);
1310
1311         if(host->is_sdio)
1312                 sdio_host = host;
1313         host->get_wifi_cd = pdata->status;
1314
1315         host->irq = platform_get_irq(pdev, 0);
1316         if (host->irq < 0) {
1317                 dev_err(&pdev->dev, "platform_get_irq error\n");
1318                 ret = host->irq;
1319                 goto err_mmc_free_host;
1320         }
1321
1322         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1323         if (!regs) {
1324                 dev_err(&pdev->dev, "platform_get_resource error\n");
1325                 ret = -ENXIO;
1326                 goto err_mmc_free_host;
1327         }
1328
1329         host->regs = ioremap(regs->start, regs->end - regs->start);
1330         if (!host->regs){
1331                 dev_err(&pdev->dev, "ioremap error\n");
1332                 ret = ENXIO;
1333             goto err_mmc_free_host;
1334         }
1335         spin_lock_init(&host->lock);
1336
1337         /* dma init */
1338         rk29_sdmmc_get_dma_dma_info(host);
1339         ret = rk29_dma_request(host->dma_info.chn, &(host->dma_info.client), NULL);
1340         if (ret < 0){
1341                 dev_err(&pdev->dev, "rk29_dma_request error\n");
1342             goto err_iounmap;
1343         }
1344         ret = rk29_dma_config(host->dma_info.chn, 4, 1);
1345
1346         if (ret < 0){
1347                 dev_err(&pdev->dev, "rk29_dma_config error\n");
1348             //goto err_rk29_dma_free;
1349         }
1350         ret = rk29_dma_set_buffdone_fn(host->dma_info.chn, rk29_sdmmc_dma_complete);
1351         if (ret < 0){
1352                 dev_err(&pdev->dev, "rk29_dma_set_buffdone_fn error\n");
1353             goto err_rk29_dma_free;
1354         }
1355         host->dma_addr = regs->start + SDMMC_DATA;
1356
1357         /* clk init */
1358         host->clk = clk_get(&pdev->dev, "mmc");
1359         if(host->is_sdio)
1360                 clk_set_rate(host->clk,RK29_SDIO_CLK * 1000000);
1361         else
1362                 clk_set_rate(host->clk,RK29_SDCARD_CLK * 1000000);
1363         clk_enable(host->clk);
1364         clk_enable(clk_get(&pdev->dev, "hclk_mmc"));
1365         host->bus_hz = clk_get_rate(host->clk);
1366
1367         /* reset all blocks */
1368         rk29_sdmmc_write(host->regs, SDMMC_CTRL,(SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET));
1369         /* wait till resets clear */
1370         while (rk29_sdmmc_read(host->regs, SDMMC_CTRL) & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET));
1371          /* Clear the interrupts for the host controller */
1372         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, 0xFFFFFFFF);
1373         rk29_sdmmc_write(host->regs, SDMMC_INTMASK, 0); // disable all mmc interrupt first
1374         /* Put in max timeout */
1375         rk29_sdmmc_write(host->regs, SDMMC_TMOUT, 0xFFFFFFFF);
1376
1377         /* FIFO threshold settings  */
1378         rk29_sdmmc_write(host->regs, SDMMC_FIFOTH, ((0x3 << 28) | (0x0f << 16) | (0x10 << 0))); // RXMark = 15, TXMark = 16, DMA Size = 16
1379         /* disable clock to CIU */
1380         rk29_sdmmc_write(host->regs, SDMMC_CLKENA,0);
1381         rk29_sdmmc_write(host->regs, SDMMC_CLKSRC,0);
1382         rk29_sdmmc_write(host->regs, SDMMC_PWREN, 1);
1383
1384         ret = request_irq(host->irq, rk29_sdmmc_isr, 0, dev_name(&pdev->dev), host);
1385         if (ret < 0){
1386                 dev_err(&pdev->dev, "request_irq error\n");
1387             goto err_rk29_dma_free;
1388         }
1389
1390         /* card insert flags init*/
1391     if (pdata->register_status_notify) {
1392         pdata->register_status_notify(rk29_sdmmc1_status_notify_cb, host);
1393     }
1394
1395         /* add host */
1396         if(host->is_sdio)
1397                 mmc->ops = &rk29_sdmmc_ops[1];
1398         else
1399                 mmc->ops = &rk29_sdmmc_ops[0];
1400         if (host->is_sdio)
1401                 mmc->pm_flags = MMC_PM_IGNORE_PM_NOTIFY;   //ignore pm notify
1402
1403         mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510);
1404         mmc->f_max = host->bus_hz;
1405         mmc->ocr_avail = pdata->host_ocr_avail;
1406         mmc->caps = pdata->host_caps;
1407         mmc->max_phys_segs = 64;
1408         mmc->max_hw_segs = 64;
1409         mmc->max_blk_size = 4096;
1410         mmc->max_blk_count = 65535;
1411         mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1412         mmc->max_seg_size = mmc->max_req_size;
1413
1414         ret = mmc_add_host(mmc);
1415         if (ret < 0){
1416                 dev_err(&pdev->dev, "mmc_add_host error\n");
1417             goto err_free_irq;
1418         }
1419
1420 #if defined (CONFIG_DEBUG_FS)
1421         rk29_sdmmc_init_debugfs(host);
1422 #endif
1423         tasklet_init(&host->tasklet, rk29_sdmmc_tasklet_func, (unsigned long)host);
1424         setup_timer(&host->monitor_timer, rk29_sdmmc_monitor_timer,(unsigned long)host);
1425
1426         host->gpio_det = pdata->detect_irq;
1427         if(!host->is_sdio && host->gpio_det != INVALID_GPIO) {
1428                 INIT_DELAYED_WORK(&host->work, rk29_sdmmc_detect_change_work);
1429                 ret = gpio_request(host->gpio_det, "sd_detect");
1430                 if(ret < 0) {
1431                         dev_err(&pdev->dev, "gpio_request error\n");
1432                         goto err_mmc_remove_host;
1433                 }
1434                 gpio_direction_input(host->gpio_det);
1435                 host->gpio_irq = gpio_to_irq(host->gpio_det);
1436
1437                 ret = request_irq(host->gpio_irq,
1438                                   rk29_sdmmc_detect_change_isr,
1439                                   rk29_sdmmc_get_cd(host->mmc)?IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING,
1440                                   "sd_detect",
1441                                   host);
1442                 if(ret < 0) {
1443                         dev_err(&pdev->dev, "gpio request_irq error\n");
1444                         goto err_gpio_free;
1445                 }
1446                 host->enable_sd_warkup = pdata->enable_sd_wakeup;
1447                 if(host->enable_sd_warkup)
1448                         enable_irq_wake(host->gpio_irq);
1449         }
1450         platform_set_drvdata(pdev, host);
1451         rk29_sdmmc_write(host->regs, SDMMC_CTYPE, 0);
1452         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, 0xFFFFFFFF);
1453         rk29_sdmmc_write(host->regs, SDMMC_INTMASK,SDMMC_INT_CMD_DONE | SDMMC_INT_DTO | RK29_SDMMC_ERROR_FLAGS);
1454         rk29_sdmmc_write(host->regs, SDMMC_CTRL,SDMMC_CTRL_INT_ENABLE);
1455         rk29_sdmmc_write(host->regs, SDMMC_CLKENA,1);
1456 #ifdef CONFIG_HAS_EARLYSUSPEND
1457         host->early_suspend.suspend = rk29_sdmmc_early_suspend;
1458         host->early_suspend.resume = rk29_sdmmc_early_resume;
1459         host->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
1460         register_early_suspend(&host->early_suspend);
1461 #endif
1462         dev_info(host->dev, "RK29 SDMMC controller at irq %d\n", host->irq);
1463         return 0;
1464         free_irq(host->gpio_irq, host);
1465 err_gpio_free:
1466         gpio_free(host->gpio_det);
1467 err_mmc_remove_host:
1468         mmc_remove_host(host->mmc);
1469 err_free_irq:
1470         free_irq(host->irq, host);
1471 err_rk29_dma_free:
1472         rk29_dma_free(host->dma_info.chn, &host->dma_info.client);
1473 err_iounmap:
1474         iounmap(host->regs);
1475 err_mmc_free_host:
1476         mmc_free_host(host->mmc);
1477
1478         while(1);
1479         return ret;
1480
1481 }
1482
1483
1484
1485 static int __exit rk29_sdmmc_remove(struct platform_device *pdev)
1486 {
1487         struct rk29_sdmmc *host = platform_get_drvdata(pdev);
1488
1489         rk29_sdmmc_write(host->regs, SDMMC_RINTSTS, 0xFFFFFFFF);
1490         rk29_sdmmc_write(host->regs, SDMMC_INTMASK, 0); // disable all mmc interrupt first
1491
1492         smp_wmb();
1493         free_irq(host->gpio_irq, host);
1494         gpio_free(host->gpio_det);
1495         mmc_remove_host(host->mmc);
1496         free_irq(host->irq, host);
1497         rk29_dma_free(host->dma_info.chn, &host->dma_info.client);
1498
1499         /* disable clock to CIU */
1500         rk29_sdmmc_write(host->regs, SDMMC_CLKENA,0);
1501         rk29_sdmmc_write(host->regs, SDMMC_CLKSRC,0);
1502
1503         iounmap(host->regs);
1504         mmc_free_host(host->mmc);
1505         return 0;
1506 }
1507 static int rk29_sdmmc_suspend(struct platform_device *pdev, pm_message_t state)
1508 {
1509         int ret = 0;
1510 #ifdef CONFIG_PM
1511         struct rk29_sdmmc *host = platform_get_drvdata(pdev);
1512
1513         dev_info(host->dev, "Enter rk29_sdmmc_suspend\n");
1514         if(host->mmc && !host->is_sdio && host->gpio_det != INVALID_GPIO){
1515                 ret = mmc_suspend_host(host->mmc,state);
1516                 if(!host->enable_sd_warkup)
1517                         free_irq(host->gpio_irq, host);
1518         }
1519         rk29_sdmmc_write(host->regs, SDMMC_CLKENA, 0);
1520         clk_disable(host->clk);
1521 #endif
1522         return ret;
1523 }
1524
1525 static int rk29_sdmmc_resume(struct platform_device *pdev)
1526 {
1527         int ret = 0;
1528 #ifdef CONFIG_PM
1529         struct rk29_sdmmc *host = platform_get_drvdata(pdev);
1530
1531         dev_info(host->dev, "Exit rk29_sdmmc_suspend\n");
1532         clk_enable(host->clk);
1533     rk29_sdmmc_write(host->regs, SDMMC_CLKENA, 1);
1534         if(host->mmc && !host->is_sdio && host->gpio_det != INVALID_GPIO){
1535                 if(!host->enable_sd_warkup){
1536                         ret = request_irq(host->gpio_irq,
1537                                   rk29_sdmmc_detect_change_isr,
1538                                   rk29_sdmmc_get_cd(host->mmc)?IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING,
1539                                   "sd_detect",
1540                                   host);
1541                         if(ret < 0)
1542                         dev_err(host->dev, "gpio request_irq error\n");
1543                 }
1544                 host->is_init = 1;
1545                 ret = mmc_resume_host(host->mmc);
1546                 mmc_detect_change(host->mmc, 0);
1547         }
1548 #endif
1549         return ret;
1550 }
1551 static struct platform_driver rk29_sdmmc_driver = {
1552         .suspend    = rk29_sdmmc_suspend,
1553         .resume     = rk29_sdmmc_resume,
1554         .remove         = __exit_p(rk29_sdmmc_remove),
1555         .driver         = {
1556                 .name           = "rk29_sdmmc",
1557         },
1558 };
1559
1560 static int __init rk29_sdmmc_init(void)
1561 {
1562         return platform_driver_probe(&rk29_sdmmc_driver, rk29_sdmmc_probe);
1563 }
1564
1565 static void __exit rk29_sdmmc_exit(void)
1566 {
1567         platform_driver_unregister(&rk29_sdmmc_driver);
1568 }
1569
1570 module_init(rk29_sdmmc_init);
1571 module_exit(rk29_sdmmc_exit);
1572
1573 MODULE_DESCRIPTION("Rk29 Multimedia Card Interface driver");
1574 MODULE_AUTHOR("Rockchips");
1575 MODULE_LICENSE("GPL v2");
1576