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Diff for /funnyos/dev/sdmmc/sdmmc_spi.c between version 1.1 and 1.4

version 1.1, 2007/12/20 15:23:15 version 1.4, 2007/12/25 14:10:51
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 #include <dev/sdmmc/sdmmcvar.h>  #include <dev/sdmmc/sdmmcvar.h>
 #include <libkern/printf.h>  #include <libkern/printf.h>
   
   #define SPISDMMC_DEBUG
   
   #ifdef SPISDMMC_DEBUG
   #define DPRINTF(x...)   do { printf(x); } while (0)
   #else
   #define DPRINTF(x...)   { }
   #endif
   
   #define SPISDMMC_RESP_TIMEOUT 64
   
 /*  /*
  * SD/MMC conversation over SPI bus.   * SD/MMC conversation over SPI bus.
  */   */
 struct spisdmmc_dd {  struct spisdmmc_dd {
         struct spi_bus_handle *ss_sbhp;          struct spi_bus_handle *ss_sbhp;
   
 //      struct sdmmc_bus_handle;          struct sdmmc_bus_handle ss_smbh;
 };  };
   
 int     spisdmmc_attach(struct device *, uint32_t, uint8_t);  int             spisdmmc_attach(struct device *, uint32_t, uint8_t);
   uint8_t         spisdmmc_init(void *dd);
   uint8_t         spisdmmc_send_command(void *dd, uint8_t cmd, uint32_t arg, uint8_t crc);
   uint8_t         spisdmmc_set_block_size(void *dd, uint16_t size);
   uint8_t         spisdmmc_read_block(void *dd, uint32_t addr, char *buffp);
   
   
   
 struct driver spisdmmc_dr = {  struct driver spisdmmc_dr = {
         sizeof(struct spisdmmc_dd),          sizeof(struct spisdmmc_dd),
         spisdmmc_attach,          spisdmmc_attach,
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         printf("SPI SD/MMC\n");          printf("SPI SD/MMC\n");
   
           /*
            * Interface to children.
            */
           ddp->ss_smbh.sb_init = spisdmmc_init;
           ddp->ss_smbh.sb_send_command = spisdmmc_send_command;
           ddp->ss_smbh.sb_set_block_size = spisdmmc_set_block_size;
   //      ddp->ss_smbh.sb_read_block = spisdmmc_read_block;
   //      ddp->ss_smbh.sb_write_block = spisdmmc_write_block;
           ddp->ss_smbh.sb_dd = ddp;
   
           self->dv_aux = &ddp->ss_smbh;
   
         return(0);          return(0);
 }  }
   
   
 int  uint8_t
 spisdmmc_init(struct spisdmmc_dd *ddp)  spisdmmc_init(void *dd)
 {  {
           struct spisdmmc_dd *ddp = dd;
         uint8_t i, resp;          uint8_t i, resp;
   
         /*          /*
          * Apply 80 clock pulses.           * Initialize SD/MMC card so it can accept generic read/write commands.
          * XXX assert CS. (NPCS0)           * Remember that we should hold CS signal low during all transactions (cmd, resp, data).
          */           */
         for (i = 0; i < 9; i++)  
                 spi_transmit(ddp->ss_sbhp, 0xff);  
   
         /*          /* CS high */
          * Apply 16 clocks.          spi_cs_high(ddp->ss_sbhp);
          * XXX deassert CS.          /* wait 80 pulses */
          */          for (i =0; i < 9; i++)
         for (i = 0; i < 2; i ++)  
                 spi_transmit(ddp->ss_sbhp, 0xff);                  spi_transmit(ddp->ss_sbhp, 0xff);
   
         /*          /*
          * Send CMD0_GO_IDLE_STATE.           * Send CMD0_GO_IDLE_STATE
            * CS line will go low in send_command and up before return here.
          */           */
         spisdmmc_send_command(ddp, CMD0_GO_IDLE_STATE, 0, CMD0_HARDCODED_CRC);          resp = spisdmmc_send_command(ddp, CMD0_GO_IDLE_STATE, 0, 0x95);
         if (spisdmmc_get_response(ddp) != 0) {          printf("spisdmmc_init: CMD0 reply 0x%x\n", resp);
                 printf("spisdmmc_init: CMD0_GO_IDLE_STATE failed with %d\n", resp);  
   
                 return(-1);          return(0);
         }  
   
 }  }
   
   
 void  uint8_t
 spisdmmc_send_command(struct spisdmmc_dd *ddp, uint8_t cmd, uint32_t arg, uint32_t crc)  spisdmmc_send_command(void *dd, uint8_t cmd, uint32_t arg, uint8_t crc)
 {  {
           struct spisdmmc_dd *ddp = dd;
           uint8_t resp;
           /*
            * Construct command frame and send command to the card.
            * Try to read reply SASPI_RESP_TIMEOUT times and return it if it's R1 response.
            * Return 255 if timeout.
            */
         struct sdmmc_cmdframe sdcf;          struct sdmmc_cmdframe sdcf;
         uint8_t i;          uint8_t to = 0;
   
         /* construct frame */          /* construct frame */
         sdcf = sdmmc_command(cmd, arg, crc);          sdcf = sdmmc_command(cmd, arg, crc);
   
         /* transmit token */  //      printf("spisdmmc_send_command: sending cmd %d arg 0x%x crc 0x%x\n", sdcf.sc_cmd & ~0xc0, sdcf.sc_arg, sdcf.sc_crc);
           /* CS low */
           spi_cs_low(ddp->ss_sbhp);
   
           /* transmit cmd */
         spi_transmit(ddp->ss_sbhp, sdcf.sc_cmd);          spi_transmit(ddp->ss_sbhp, sdcf.sc_cmd);
   
         /* transmit 32 bit argument XXX MSB first */          /* transmit 32 bit argument MSB first */
         for(i = 0; i < 4; i++)          spi_transmit(ddp->ss_sbhp, sdcf.sc_arg >> 24 );
                 spi_transmit(ddp->ss_sbhp, ((sdcf.sc_arg & (0xff000000 >> i)) >> (8 * (4 - i + 1))) );          spi_transmit(ddp->ss_sbhp, sdcf.sc_arg >> 16 );
           spi_transmit(ddp->ss_sbhp, sdcf.sc_arg >> 8 );
           spi_transmit(ddp->ss_sbhp, sdcf.sc_arg );
   
         /* transmit CRC field */          /* transmit CRC field */
         spi_transmit(ddp->ss_sbhp, sdcf.sc_cmd)          spi_transmit(ddp->ss_sbhp, sdcf.sc_crc);
   
           /* CS high */
           spi_cs_high(ddp->ss_sbhp);
   
           /* XXX Apply NCR clock pulses */
           spi_transmit(ddp->ss_sbhp, 0xff);
   
           /* CS low */
           spi_cs_low(ddp->ss_sbhp);
   
           /* read response */
           /* XXX what about non-R1 responses? */
           while(to < SPISDMMC_RESP_TIMEOUT) {
                   resp = spi_transmit(ddp->ss_sbhp, 0xff);
   
   //              if (resp & 0x80 == 0) {
                   if (resp != 0xff) {
                           /* seems like R1 response */
                           spi_cs_high(ddp->ss_sbhp);
   
                           return(resp);
                   }
   
                   to++;
           }
   
           /* timeout */
           spi_cs_high(ddp->ss_sbhp);
   
           DPRINTF("spisdmmc_send_command: response timeout for cmd %d arg 0x%x crc 0x%x\n", cmd, arg, crc);
   
           return(0xff);   /* error */
 }  }
   
   
   uint8_t
   spisdmmc_set_block_size(void *dd, uint16_t blksize)
   {
           struct spisdmmc_dd *ddp = dd;
           uint8_t resp;
           /*
            * Set block size (CMD16).
            */
   
           return(0);
   }
   
   
   uint8_t
   spisdmmc_read_block(void *dd, uint32_t addr, char *buff)
   {
           struct spisdmmc_dd *ddp = dd;
           /*
            * Read block.
            */
   };
   
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  Added in v.1.4
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