URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [drivers/] [ata.c] - Blame information for rev 578

Go to most recent revision | Details | Compare with Previous | View Log


/*
    ata.c -- ATA driver
    Copyright (C) 2002 Richard Herveille, rherveille@opencores.org
 
    This file is part of OpenRISC 1000 Reference Platform Monitor (ORPmon)
 
    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 of the License, 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
 
#include <string.h>
 
/* get prototype for 'printf'
   get IN_CLOCK (from 'board.h')
*/
#include "common.h"
#include "ata.h"
 
 
/*
  static constants (yuck, yuck, yuck)
*/
static int usage[2] = {0, 0};
static int hardsect_size[2] = {512, 512};
static int current_pio_mode = 9999;
 
/*
  local defines
*/
#define TYPE(devid) (devid >> 4)
#define REV(devid)  (devid & 0xf)
 
#define BASE(inode)    ( (unsigned long) (MAJOR(inode->i_rdev) << 24) )
#define DEVICE(inode)  ( MINOR(inode->i_rdev) )
 
#define IN_CLK_MHZ (IN_CLK / 1000000)
#define TO_TICKS(time) ( ((time + (IN_CLK_MHZ >> 1)) / IN_CLK_MHZ) -1 )
 
 
/*
       A T A _ O P E N
 
       opens ata device;
       - identifies ata-device-id
       - programs ata-host
 
       MAJOR: atahost identification (base address)
       MINOR: atadevice identification (MSB=0: device0, MSB=1: device1)
*/
int ata_open(struct inode *inode, struct file *filp)
{
  unsigned int atahost, device;
  unsigned short buf[256];
  unsigned short dev_pio;
  unsigned long sectors;
 
  char txt[41];
 
printf( "Checking device-id\n" );
  /* check device-id (MINOR number)                                   */
  if ( (device = DEVICE(inode)) > 1 )
      return EOPENIDEV;
 
printf( "Searching for hostcontroller: " );
  /* get atahost id                                                   */
  atahost = ata_ioctl(inode, filp, ATA_IOCTL_IDENTIFY_HOST, 0);
  if (atahost)
  {
    printf( "OCIDEC-%1d, revision 0x%02X found at 0x%08lX.\n", TYPE(atahost), REV(atahost), BASE(inode) );
  }
  else
  {
    printf( "No OCIDEC device found.\n" );
    return EOPENIHOST;
  }
 
 
  /* check if the host has been opened already                        */
  if (!usage[device]++)
  {
printf( "Opening device for the first time\n" );
      /* no, take device out of reset                                 */
      ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, CLR | ARG_HW_RST);
      ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, CLR | ARG_SW_RST);
 
      /* program PIO timing registers (set to PIO mode 0)             */
      ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO0);
 
      /* enable host controller (for old OCIDEC cores)                */
      ata_ioctl(inode, filp, ATA_IOCTL_ENABLE_HOST, 0);
  }
 
  /* select requested device                                          */
  ata_ioctl(inode, filp, ATA_IOCTL_SELECT_DEVICE, 0);
 
printf( "Executing IdentifyDevice command\n" );
  /* identify requested ata-devices                                   */
  ata_ioctl(inode, filp, ATA_IOCTL_EXEC_CMD, IDENTIFY_DEVICE);
 
  /* read block from ata-device                                 */
  buf[0] = 256;
  ata_ioctl(inode, filp, ATA_IOCTL_READ, (unsigned long) buf);
 
  /* check if a valid device was found                                */
  /* bit 15 in identify_device word0 must be '0',
     or be equal to 0x848a (CFA feature set)                          */
  if ( (buf[0] & 0x8000) && (buf[0] != 0x848a) )
  {
    ata_release(inode, filp);
    return EOPENNODEV;
  }
 
  /* Then check specific configuration word                           */
  if (buf[0] == 0x848a)
    printf( "Found CompactFLASH device.\n" );
  else
    switch(buf[2]) {
       case 0x37c8:
           /* device does require SET_FEATURES
              IDENTIFY_DEVICE response is incomplete                  */
       case 0x738c:
           /* device does require SET_FEATURES
              IDENTIFY_DEVICE response is complete                    */
           ata_ioctl(inode, filp, ATA_IOCTL_SET_FEATURES, 0); //FIXME
           break;
       case 0x8c73:
           /* device does not require SET_FEATURES
              IDENTIFY_DEVICE response is incomplete                  */
       case 0xc837:
           /* device does not require SET_FEATURES
              IDENTIFY_DEVICE response is complete                    */
           break;
 
       default:
           ata_release(inode, filp);
           return EOPENNODEV;
     }
 
  /* checks ok                                                        */
 
  /* display device model, serialnumber, and firmware revision        */
  memcpy(txt, &buf[27], 40);
  txt[40] = '\0';
  printf( "Model       : %s\n", txt );
 
  memcpy(txt, &buf[10], 20);
  txt[20] = '\0';
  printf( "Serial      : %s\n", txt );
 
  memcpy( txt, &buf[23], 8);
  txt[8] = '\0';
  printf( "Firmware rev: %s\n", txt );
 
  /* display size in MBytes                                           */
  sectors = (buf[61] << 16) | buf[60];
  printf( "              %ld MBytes ", sectors >> 11 ); /* assuming 512bytes per sector */
 
  /* get supported pio modes                                          */
  dev_pio = buf[64];
 
  /* program ocidec timing registers to highest possible pio mode     */
  if (dev_pio & PIO4)
  {
      printf("PIO-4 supported\n");
      ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO4);
  }
  else if (dev_pio & PIO3)
  {
      printf("PIO-3 supported\n");
      ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO3);
  }
  else
  {
      printf("PIO-2 supported\n");
      ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO2);
  }
 
  return 0;
}
 
 
/*
       A T A _ R E L E A S E
 
       closes ata device;
*/
int ata_release(struct inode *inode, struct file *filp)
{
  /* decrease usage count */
  if (!--usage[DEVICE(inode)])
  {
    /* reset atahost */
    ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, SET | ARG_HW_RST);
  }
 
  return 0;
}
 
 
/*
       A T A _ R E A D _ D P O R T
 
       closes ata device;
*/
int ata_read_dport(unsigned long base)
{
  /* device ready to transfer data ?? */
  while ( !ata_dev_datrdy(base) );
 
  return REG32(base + ATA_DR);
}
 
 
/*
        A T A _ I O C T L
*/
int ata_ioctl(struct inode *inode, struct file *filp, unsigned command, unsigned long argument)
{
    unsigned long base = BASE(inode);
 
    switch (command)
    {
        case ATA_IOCTL_ENABLE_HOST:
        /* enables the ATA host controller (sets IDE_EN bit)          */
        {
            REG32(base + ATA_CTRL) |= ATA_IDE_EN;
            return 0;
        }
 
 
        case ATA_IOCTL_EXEC_CMD:
        /* sends a command to the ATA device                          */
        {
          while( ata_dev_busy(base) ); // wait for device ready
          ata_cmd(base) = argument & 0xff;
          return 0;
        }
 
 
        case ATA_IOCTL_READ:
        {
          unsigned short *buf_ptr = (short *)argument;
          int n, cnt;
 
          cnt = buf_ptr[0];
          for (n=0; n < cnt; n++)
          {
            while( !ata_dev_datrdy(base) );     // wait for data
            *buf_ptr++ = ata_read_dport(base);  // read data
          }
 
          return 0;
        }
 
 
        case ATA_IOCTL_IDENTIFY_HOST:
        /* reads OCIDEC status register configuration bits            */
            return (REG32(base + ATA_STAT) >> 24);
 
 
        case ATA_IOCTL_SELECT_DEVICE:
        /* selects ATA device                                         */
        {
          while( ata_dev_busy(base) ); // wait for device ready
 
          /* sets the DEV bit in the device/head register             */
          if ( DEVICE(inode) )
            REG32(base + ATA_DHR) |= ATA_DHR_DEV;  /* select device1  */
          else
            REG32(base + ATA_DHR) &= ~ATA_DHR_DEV; /* select device0  */
 
          return 0;
        }
 
 
        case ATA_IOCTL_SET_FTE:
        {
          /* set FTE bits                                             */
          if ( MINOR(inode->i_rdev) )
            if (argument)
                REG32(base + ATA_CTRL) |= ATA_IORDY_FTE0;
              else
                REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE0;
          else
            if (argument)
                REG32(base + ATA_CTRL) |= ATA_IORDY_FTE1;
              else
                REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;
 
          return 0;
        }
 
 
        case ATA_IOCTL_SET_PIO:
        /* programs the PIO timing registers                          */
        {
          unsigned long timing;
          unsigned short buf[256];
 
          /* do we need to read the identify_device block ??          */
          if (argument & (ARG_PIO4 | ARG_PIO3) )
          {
            /* identify requested ata-devices                         */
            ata_ioctl(inode, filp, ATA_IOCTL_EXEC_CMD, IDENTIFY_DEVICE);
 
            /* read block from ata-device                             */
            buf[0] = 256;
            ata_ioctl(inode, filp, ATA_IOCTL_READ, (unsigned long) buf);
          }
 
          /* program register transfer timing registers               */
          /* set the slowest pio mode for register transfers          */
          if (argument < current_pio_mode)
          {
            switch (argument)
            {
              case ARG_PIO4:
                if ( (buf[53] & 0x01) && buf[68] )
                  timing = ata_calc_pio_timing(buf[68], PIO4_RT1, PIO4_RT2, PIO4_RT4, PIO4_RT2I, PIO4_RT9);
                else
                  timing = ata_calc_pio_timing(PIO4_RT0, PIO4_RT1, PIO4_RT2, PIO4_RT4, PIO4_RT2I, PIO4_RT9);
                break;
 
              case ARG_PIO3:
                if ( (buf[53] & 0x01) && buf[68] )
                  timing = ata_calc_pio_timing(buf[68], PIO3_RT1, PIO3_RT2, PIO3_RT4, PIO3_RT2I, PIO3_RT9);
                else
                  timing = ata_calc_pio_timing(PIO3_RT0, PIO3_RT1, PIO3_RT2, PIO3_RT4, PIO3_RT2I, PIO3_RT9);
                break;
 
              case ARG_PIO2:
                timing = ata_calc_pio_timing(PIO2_RT0, PIO2_RT1, PIO2_RT2, PIO2_RT4, PIO2_RT2I, PIO2_RT9);
                break;
 
              case ARG_PIO1:
                timing = ata_calc_pio_timing(PIO1_RT0, PIO1_RT1, PIO1_RT2, PIO1_RT4, PIO1_RT2I, PIO1_RT9);
                break;
 
              default: /* PIO mode 0 */
                timing = ata_calc_pio_timing(PIO0_RT0, PIO0_RT1, PIO0_RT2, PIO0_RT4, PIO0_RT2I, PIO0_RT9);
                break;
            }
 
            /* program IORDY bit                                      */
            if (argument & (ARG_PIO4 | ARG_PIO3) )
                REG32(base + ATA_CTRL) |= ATA_IORDY;
            else
                REG32(base + ATA_CTRL) &= ~ATA_IORDY;
 
            /* program register transfer timing registers             */
            REG32(base + ATA_PCTR) = timing;
 
            current_pio_mode = argument;
          }
 
          /* Program data transfer timing registers                   */
          if ( TYPE(ata_ioctl(inode, filp, ATA_IOCTL_IDENTIFY_HOST, 0)) > 1 )
          {
            switch (argument)
            {
              case ARG_PIO4:
                if ( (buf[53] & 0x01) && buf[68] )
                  timing = ata_calc_pio_timing(buf[68], PIO4_DT1, PIO4_DT2, PIO4_DT4, PIO4_DT2I, PIO4_DT9);
                else
                  timing = ata_calc_pio_timing(PIO4_DT0, PIO4_DT1, PIO4_DT2, PIO4_DT4, PIO4_DT2I, PIO4_DT9);
                break;
 
              case ARG_PIO3:
                if ( (buf[53] & 0x01) && buf[68] )
                  timing = ata_calc_pio_timing(buf[68], PIO3_DT1, PIO3_DT2, PIO3_DT4, PIO3_DT2I, PIO3_DT9);
                else
                  timing = ata_calc_pio_timing(PIO3_DT0, PIO3_DT1, PIO3_DT2, PIO3_DT4, PIO3_DT2I, PIO3_DT9);
                break;
 
              case ARG_PIO2:
                timing = ata_calc_pio_timing(PIO2_DT0, PIO2_DT1, PIO2_DT2, PIO2_DT4, PIO2_DT2I, PIO2_DT9);
                break;
 
              case ARG_PIO1:
                timing = ata_calc_pio_timing(PIO1_DT0, PIO1_DT1, PIO1_DT2, PIO1_DT4, PIO1_DT2I, PIO1_DT9);
                break;
 
              default: /* PIO mode 0 */
                timing = ata_calc_pio_timing(PIO0_DT0, PIO0_DT1, PIO0_DT2, PIO0_DT4, PIO0_DT2I, PIO0_DT9);
                break;
            }
 
            /* program data transfer timing registers, set IORDY bit  */
            if ( MINOR(inode->i_rdev) )
            {
              REG32(base + ATA_PFTR1) = timing;
 
              /* program IORDY bit                                    */
              if ( argument & (ARG_PIO4 | ARG_PIO3) )
                REG32(base + ATA_CTRL) |= ATA_IORDY_FTE1;
              else
                REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;
            }
            else
            {
              REG32(base + ATA_PFTR0) = timing;
 
              /* program IORDY bit                                    */
              if ( argument & (ARG_PIO4 | ARG_PIO3) )
                REG32(base + ATA_CTRL) |= ATA_IORDY_FTE1;
              else
                REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;
            }
 
            /* enable data transfer timing                            */
            ata_ioctl(inode, filp, ATA_IOCTL_SET_FTE, 1);
          }
 
          return 0;
        }
 
 
        case ATA_IOCTL_SET_RST:
        /* sets or clears reset bits                                  */
          if (argument & SET)
            switch (argument & ~SET) {
                case ARG_HW_RST:  /* ata hardware reset               */
                    REG32(base + ATA_CTRL) |= ATA_RST;
                    return 0;
 
                case ARG_SW_RST:  /* ata software reset               */
                    REG32(base + ATA_DCR) |= ATA_DCR_RST;
                    return 0;
 
                case ARG_DEV_RST: /* ata device reset                 */
                    REG32(base + ATA_CR) = DEVICE_RESET;
                    return 0;
 
                default:
                    return EIOCTLIARG;
            }
          else
          {
            switch(argument & ~SET) {
                case ARG_HW_RST:  /* ata hardware reset               */
                    REG32(base + ATA_CTRL) &= ~ATA_RST;
                    return 0;
 
                case ARG_SW_RST:  /* ata software reset               */
                    REG32(base + ATA_DCR) &= ~ATA_DCR_RST;
                    return 0;
 
                case ARG_DEV_RST: /* ata device reset                 */
                    return 0;
 
                default:
                    return EIOCTLIARG;
            }
          }
 
 
        default:
            printf( "FIXME: Unsupported IOCTL call %1d\n", command );
            return EINVAL;
    }
}
 
 
unsigned long ata_calc_pio_timing(short t0, short t1, short t2, short t4, short t2i, short t9)
{
    int teoc;
 
    teoc = t0 - t1 - t2;
 
    if (teoc < 0)
      teoc = 0;
 
    if (t9 > teoc)
      teoc = t9;
 
    if (t2i > teoc)
      teoc = t2i;
 
    t1   = TO_TICKS(t1);
    t2   = TO_TICKS(t2);
    t4   = TO_TICKS(t4);
    teoc = TO_TICKS(teoc);
 
    return (teoc << ATA_TEOC) | (t4 << ATA_T4) | (t2 << ATA_T2) | (t1 << ATA_T1);
}
 
 
/*
        A T A _ R E Q U E S T
*/
int ata_request(struct inode *inode, struct file *filp, struct request *request)
{
  unsigned int device = MINOR(inode->i_rdev);
  unsigned long base = BASE(inode);
  unsigned int sector_size;
 
  /* get the sector size for the current device                       */
  sector_size = hardsect_size[device] >> 1;
 
  /* set the device                                                   */
  ata_ioctl(inode, filp, ATA_IOCTL_SELECT_DEVICE, device);
 
  /* get the base address                                             */
  base = BASE(inode);
 
  switch (request->cmd) {
    case READ:
        {
            register unsigned long i, n;
            register unsigned short rd_data;
            register char *buf_ptr;
 
            /* program ata-device registers                           */
            REG32(base + ATA_DHR) = ((request->sector >> 24) & ATA_DHR_H) | ATA_DHR_LBA;
            REG32(base + ATA_CHR) = (request->sector >> 16) & 0xff;
            REG32(base + ATA_CLR) = (request->sector >> 8) & 0xff;
            REG32(base + ATA_SNR) = request->sector & 0xff;
 
            REG32(base + ATA_SCR) = request->nr_sectors;
 
            /* send 'read_sector(s)' command                          */
            REG32(base + ATA_CR) = READ_SECTORS;
 
            /* check status & error registers                         */
            if ( ata_astatus(base) & ATA_SR_ERR)
                return -1;
 
            /* read data from devices and store it in the buffer      */
            buf_ptr = request->buffer;
 
            for (n=0; n < request->nr_sectors; n++)
            for (i=0; i < sector_size; i++)
            {
                rd_data = ata_read_dport(base);
 
                /* the data is byte reversed, swap high & low bytes   */
                *buf_ptr++ = rd_data;
                *buf_ptr++ = rd_data >> 8;
            }
 
            return 0;
    }
 
 
    case WRITE:
        /* check if device may be written to                          */
        if (filp->f_mode & FMODE_WRITE)
        {
          /* do the write stuff */
        }
        else
          return EINVAL;
 
 
    default:
       return EINVAL;
  }
 
  return 0;
}

Browse

Tools

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [drivers/] [ata.c] - Blame information for rev 578

Line No.	Rev	Author	Line
1	2	marcus.erl	`/*`
2			`ata.c -- ATA driver`
3			`Copyright (C) 2002 Richard Herveille, rherveille@opencores.org`
4
5			`This file is part of OpenRISC 1000 Reference Platform Monitor (ORPmon)`
6
7			`This program is free software; you can redistribute it and/or modify`
8			`it under the terms of the GNU General Public License as published by`
9			`the Free Software Foundation; either version 2 of the License, or`
10			`(at your option) any later version`
11
12			`This program is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`GNU General Public License for more details.`
16
17			`You should have received a copy of the GNU General Public License`
18			`along with this program; if not, write to the Free Software`
19			`Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.`
20			`*/`
21
22			`#include <string.h>`
23
24			`/* get prototype for 'printf'`
25			`get IN_CLOCK (from 'board.h')`
26			`*/`
27			`#include "common.h"`
28			`#include "ata.h"`
29
30
31			`/*`
32			`static constants (yuck, yuck, yuck)`
33			`*/`
34			`static int usage[2] = {0, 0};`
35			`static int hardsect_size[2] = {512, 512};`
36			`static int current_pio_mode = 9999;`
37
38			`/*`
39			`local defines`
40			`*/`
41			`#define TYPE(devid) (devid >> 4)`
42			`#define REV(devid) (devid & 0xf)`
43
44			`#define BASE(inode) ( (unsigned long) (MAJOR(inode->i_rdev) << 24) )`
45			`#define DEVICE(inode) ( MINOR(inode->i_rdev) )`
46
47			`#define IN_CLK_MHZ (IN_CLK / 1000000)`
48			`#define TO_TICKS(time) ( ((time + (IN_CLK_MHZ >> 1)) / IN_CLK_MHZ) -1 )`
49
50
51			`/*`
52			`A T A _ O P E N`
53
54			`opens ata device;`
55			`- identifies ata-device-id`
56			`- programs ata-host`
57
58			`MAJOR: atahost identification (base address)`
59			`MINOR: atadevice identification (MSB=0: device0, MSB=1: device1)`
60			`*/`
61			`int ata_open(struct inode inode, struct file filp)`
62			`{`
63			`unsigned int atahost, device;`
64			`unsigned short buf[256];`
65			`unsigned short dev_pio;`
66			`unsigned long sectors;`
67
68			`char txt[41];`
69
70			`printf( "Checking device-id\n" );`
71			`/* check device-id (MINOR number) */`
72			`if ( (device = DEVICE(inode)) > 1 )`
73			`return EOPENIDEV;`
74
75			`printf( "Searching for hostcontroller: " );`
76			`/* get atahost id */`
77			`atahost = ata_ioctl(inode, filp, ATA_IOCTL_IDENTIFY_HOST, 0);`
78			`if (atahost)`
79			`{`
80			`printf( "OCIDEC-%1d, revision 0x%02X found at 0x%08lX.\n", TYPE(atahost), REV(atahost), BASE(inode) );`
81			`}`
82			`else`
83			`{`
84			`printf( "No OCIDEC device found.\n" );`
85			`return EOPENIHOST;`
86			`}`
87
88
89			`/* check if the host has been opened already */`
90			`if (!usage[device]++)`
91			`{`
92			`printf( "Opening device for the first time\n" );`
93			`/* no, take device out of reset */`
94			`ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, CLR \| ARG_HW_RST);`
95			`ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, CLR \| ARG_SW_RST);`
96
97			`/* program PIO timing registers (set to PIO mode 0) */`
98			`ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO0);`
99
100			`/* enable host controller (for old OCIDEC cores) */`
101			`ata_ioctl(inode, filp, ATA_IOCTL_ENABLE_HOST, 0);`
102			`}`
103
104			`/* select requested device */`
105			`ata_ioctl(inode, filp, ATA_IOCTL_SELECT_DEVICE, 0);`
106
107			`printf( "Executing IdentifyDevice command\n" );`
108			`/* identify requested ata-devices */`
109			`ata_ioctl(inode, filp, ATA_IOCTL_EXEC_CMD, IDENTIFY_DEVICE);`
110
111			`/* read block from ata-device */`
112			`buf[0] = 256;`
113			`ata_ioctl(inode, filp, ATA_IOCTL_READ, (unsigned long) buf);`
114
115			`/* check if a valid device was found */`
116			`/* bit 15 in identify_device word0 must be '0',`
117			`or be equal to 0x848a (CFA feature set) */`
118			`if ( (buf[0] & 0x8000) && (buf[0] != 0x848a) )`
119			`{`
120			`ata_release(inode, filp);`
121			`return EOPENNODEV;`
122			`}`
123
124			`/* Then check specific configuration word */`
125			`if (buf[0] == 0x848a)`
126			`printf( "Found CompactFLASH device.\n" );`
127			`else`
128			`switch(buf[2]) {`
129			`case 0x37c8:`
130			`/* device does require SET_FEATURES`
131			`IDENTIFY_DEVICE response is incomplete */`
132			`case 0x738c:`
133			`/* device does require SET_FEATURES`
134			`IDENTIFY_DEVICE response is complete */`
135			`ata_ioctl(inode, filp, ATA_IOCTL_SET_FEATURES, 0); //FIXME`
136			`break;`
137			`case 0x8c73:`
138			`/* device does not require SET_FEATURES`
139			`IDENTIFY_DEVICE response is incomplete */`
140			`case 0xc837:`
141			`/* device does not require SET_FEATURES`
142			`IDENTIFY_DEVICE response is complete */`
143			`break;`
144
145			`default:`
146			`ata_release(inode, filp);`
147			`return EOPENNODEV;`
148			`}`
149
150			`/* checks ok */`
151
152			`/* display device model, serialnumber, and firmware revision */`
153			`memcpy(txt, &buf[27], 40);`
154			`txt[40] = '\0';`
155			`printf( "Model : %s\n", txt );`
156
157			`memcpy(txt, &buf[10], 20);`
158			`txt[20] = '\0';`
159			`printf( "Serial : %s\n", txt );`
160
161			`memcpy( txt, &buf[23], 8);`
162			`txt[8] = '\0';`
163			`printf( "Firmware rev: %s\n", txt );`
164
165			`/* display size in MBytes */`
166			`sectors = (buf[61] << 16) \| buf[60];`
167			`printf( " %ld MBytes ", sectors >> 11 ); /* assuming 512bytes per sector */`
168
169			`/* get supported pio modes */`
170			`dev_pio = buf[64];`
171
172			`/* program ocidec timing registers to highest possible pio mode */`
173			`if (dev_pio & PIO4)`
174			`{`
175			`printf("PIO-4 supported\n");`
176			`ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO4);`
177			`}`
178			`else if (dev_pio & PIO3)`
179			`{`
180			`printf("PIO-3 supported\n");`
181			`ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO3);`
182			`}`
183			`else`
184			`{`
185			`printf("PIO-2 supported\n");`
186			`ata_ioctl(inode, filp, ATA_IOCTL_SET_PIO, ARG_PIO2);`
187			`}`
188
189			`return 0;`
190			`}`
191
192
193			`/*`
194			`A T A _ R E L E A S E`
195
196			`closes ata device;`
197			`*/`
198			`int ata_release(struct inode inode, struct file filp)`
199			`{`
200			`/* decrease usage count */`
201			`if (!--usage[DEVICE(inode)])`
202			`{`
203			`/* reset atahost */`
204			`ata_ioctl(inode, filp, ATA_IOCTL_SET_RST, SET \| ARG_HW_RST);`
205			`}`
206
207			`return 0;`
208			`}`
209
210
211			`/*`
212			`A T A _ R E A D _ D P O R T`
213
214			`closes ata device;`
215			`*/`
216			`int ata_read_dport(unsigned long base)`
217			`{`
218			`/* device ready to transfer data ?? */`
219			`while ( !ata_dev_datrdy(base) );`
220
221			`return REG32(base + ATA_DR);`
222			`}`
223
224
225			`/*`
226			`A T A _ I O C T L`
227			`*/`
228			`int ata_ioctl(struct inode inode, struct file filp, unsigned command, unsigned long argument)`
229			`{`
230			`unsigned long base = BASE(inode);`
231
232			`switch (command)`
233			`{`
234			`case ATA_IOCTL_ENABLE_HOST:`
235			`/* enables the ATA host controller (sets IDE_EN bit) */`
236			`{`
237			`REG32(base + ATA_CTRL) \|= ATA_IDE_EN;`
238			`return 0;`
239			`}`
240
241
242			`case ATA_IOCTL_EXEC_CMD:`
243			`/* sends a command to the ATA device */`
244			`{`
245			`while( ata_dev_busy(base) ); // wait for device ready`
246			`ata_cmd(base) = argument & 0xff;`
247			`return 0;`
248			`}`
249
250
251			`case ATA_IOCTL_READ:`
252			`{`
253			`unsigned short buf_ptr = (short )argument;`
254			`int n, cnt;`
255
256			`cnt = buf_ptr[0];`
257			`for (n=0; n < cnt; n++)`
258			`{`
259			`while( !ata_dev_datrdy(base) ); // wait for data`
260			`*buf_ptr++ = ata_read_dport(base); // read data`
261			`}`
262
263			`return 0;`
264			`}`
265
266
267			`case ATA_IOCTL_IDENTIFY_HOST:`
268			`/* reads OCIDEC status register configuration bits */`
269			`return (REG32(base + ATA_STAT) >> 24);`
270
271
272			`case ATA_IOCTL_SELECT_DEVICE:`
273			`/* selects ATA device */`
274			`{`
275			`while( ata_dev_busy(base) ); // wait for device ready`
276
277			`/* sets the DEV bit in the device/head register */`
278			`if ( DEVICE(inode) )`
279			`REG32(base + ATA_DHR) \|= ATA_DHR_DEV; /* select device1 */`
280			`else`
281			`REG32(base + ATA_DHR) &= ~ATA_DHR_DEV; /* select device0 */`
282
283			`return 0;`
284			`}`
285
286
287			`case ATA_IOCTL_SET_FTE:`
288			`{`
289			`/* set FTE bits */`
290			`if ( MINOR(inode->i_rdev) )`
291			`if (argument)`
292			`REG32(base + ATA_CTRL) \|= ATA_IORDY_FTE0;`
293			`else`
294			`REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE0;`
295			`else`
296			`if (argument)`
297			`REG32(base + ATA_CTRL) \|= ATA_IORDY_FTE1;`
298			`else`
299			`REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;`
300
301			`return 0;`
302			`}`
303
304
305			`case ATA_IOCTL_SET_PIO:`
306			`/* programs the PIO timing registers */`
307			`{`
308			`unsigned long timing;`
309			`unsigned short buf[256];`
310
311			`/* do we need to read the identify_device block ?? */`
312			`if (argument & (ARG_PIO4 \| ARG_PIO3) )`
313			`{`
314			`/* identify requested ata-devices */`
315			`ata_ioctl(inode, filp, ATA_IOCTL_EXEC_CMD, IDENTIFY_DEVICE);`
316
317			`/* read block from ata-device */`
318			`buf[0] = 256;`
319			`ata_ioctl(inode, filp, ATA_IOCTL_READ, (unsigned long) buf);`
320			`}`
321
322			`/* program register transfer timing registers */`
323			`/* set the slowest pio mode for register transfers */`
324			`if (argument < current_pio_mode)`
325			`{`
326			`switch (argument)`
327			`{`
328			`case ARG_PIO4:`
329			`if ( (buf[53] & 0x01) && buf[68] )`
330			`timing = ata_calc_pio_timing(buf[68], PIO4_RT1, PIO4_RT2, PIO4_RT4, PIO4_RT2I, PIO4_RT9);`
331			`else`
332			`timing = ata_calc_pio_timing(PIO4_RT0, PIO4_RT1, PIO4_RT2, PIO4_RT4, PIO4_RT2I, PIO4_RT9);`
333			`break;`
334
335			`case ARG_PIO3:`
336			`if ( (buf[53] & 0x01) && buf[68] )`
337			`timing = ata_calc_pio_timing(buf[68], PIO3_RT1, PIO3_RT2, PIO3_RT4, PIO3_RT2I, PIO3_RT9);`
338			`else`
339			`timing = ata_calc_pio_timing(PIO3_RT0, PIO3_RT1, PIO3_RT2, PIO3_RT4, PIO3_RT2I, PIO3_RT9);`
340			`break;`
341
342			`case ARG_PIO2:`
343			`timing = ata_calc_pio_timing(PIO2_RT0, PIO2_RT1, PIO2_RT2, PIO2_RT4, PIO2_RT2I, PIO2_RT9);`
344			`break;`
345
346			`case ARG_PIO1:`
347			`timing = ata_calc_pio_timing(PIO1_RT0, PIO1_RT1, PIO1_RT2, PIO1_RT4, PIO1_RT2I, PIO1_RT9);`
348			`break;`
349
350			`default: /* PIO mode 0 */`
351			`timing = ata_calc_pio_timing(PIO0_RT0, PIO0_RT1, PIO0_RT2, PIO0_RT4, PIO0_RT2I, PIO0_RT9);`
352			`break;`
353			`}`
354
355			`/* program IORDY bit */`
356			`if (argument & (ARG_PIO4 \| ARG_PIO3) )`
357			`REG32(base + ATA_CTRL) \|= ATA_IORDY;`
358			`else`
359			`REG32(base + ATA_CTRL) &= ~ATA_IORDY;`
360
361			`/* program register transfer timing registers */`
362			`REG32(base + ATA_PCTR) = timing;`
363
364			`current_pio_mode = argument;`
365			`}`
366
367			`/* Program data transfer timing registers */`
368			`if ( TYPE(ata_ioctl(inode, filp, ATA_IOCTL_IDENTIFY_HOST, 0)) > 1 )`
369			`{`
370			`switch (argument)`
371			`{`
372			`case ARG_PIO4:`
373			`if ( (buf[53] & 0x01) && buf[68] )`
374			`timing = ata_calc_pio_timing(buf[68], PIO4_DT1, PIO4_DT2, PIO4_DT4, PIO4_DT2I, PIO4_DT9);`
375			`else`
376			`timing = ata_calc_pio_timing(PIO4_DT0, PIO4_DT1, PIO4_DT2, PIO4_DT4, PIO4_DT2I, PIO4_DT9);`
377			`break;`
378
379			`case ARG_PIO3:`
380			`if ( (buf[53] & 0x01) && buf[68] )`
381			`timing = ata_calc_pio_timing(buf[68], PIO3_DT1, PIO3_DT2, PIO3_DT4, PIO3_DT2I, PIO3_DT9);`
382			`else`
383			`timing = ata_calc_pio_timing(PIO3_DT0, PIO3_DT1, PIO3_DT2, PIO3_DT4, PIO3_DT2I, PIO3_DT9);`
384			`break;`
385
386			`case ARG_PIO2:`
387			`timing = ata_calc_pio_timing(PIO2_DT0, PIO2_DT1, PIO2_DT2, PIO2_DT4, PIO2_DT2I, PIO2_DT9);`
388			`break;`
389
390			`case ARG_PIO1:`
391			`timing = ata_calc_pio_timing(PIO1_DT0, PIO1_DT1, PIO1_DT2, PIO1_DT4, PIO1_DT2I, PIO1_DT9);`
392			`break;`
393
394			`default: /* PIO mode 0 */`
395			`timing = ata_calc_pio_timing(PIO0_DT0, PIO0_DT1, PIO0_DT2, PIO0_DT4, PIO0_DT2I, PIO0_DT9);`
396			`break;`
397			`}`
398
399			`/* program data transfer timing registers, set IORDY bit */`
400			`if ( MINOR(inode->i_rdev) )`
401			`{`
402			`REG32(base + ATA_PFTR1) = timing;`
403
404			`/* program IORDY bit */`
405			`if ( argument & (ARG_PIO4 \| ARG_PIO3) )`
406			`REG32(base + ATA_CTRL) \|= ATA_IORDY_FTE1;`
407			`else`
408			`REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;`
409			`}`
410			`else`
411			`{`
412			`REG32(base + ATA_PFTR0) = timing;`
413
414			`/* program IORDY bit */`
415			`if ( argument & (ARG_PIO4 \| ARG_PIO3) )`
416			`REG32(base + ATA_CTRL) \|= ATA_IORDY_FTE1;`
417			`else`
418			`REG32(base + ATA_CTRL) &= ~ATA_IORDY_FTE1;`
419			`}`
420
421			`/* enable data transfer timing */`
422			`ata_ioctl(inode, filp, ATA_IOCTL_SET_FTE, 1);`
423			`}`
424
425			`return 0;`
426			`}`
427
428
429			`case ATA_IOCTL_SET_RST:`
430			`/* sets or clears reset bits */`
431			`if (argument & SET)`
432			`switch (argument & ~SET) {`
433			`case ARG_HW_RST: /* ata hardware reset */`
434			`REG32(base + ATA_CTRL) \|= ATA_RST;`
435			`return 0;`
436
437			`case ARG_SW_RST: /* ata software reset */`
438			`REG32(base + ATA_DCR) \|= ATA_DCR_RST;`
439			`return 0;`
440
441			`case ARG_DEV_RST: /* ata device reset */`
442			`REG32(base + ATA_CR) = DEVICE_RESET;`
443			`return 0;`
444
445			`default:`
446			`return EIOCTLIARG;`
447			`}`
448			`else`
449			`{`
450			`switch(argument & ~SET) {`
451			`case ARG_HW_RST: /* ata hardware reset */`
452			`REG32(base + ATA_CTRL) &= ~ATA_RST;`
453			`return 0;`
454
455			`case ARG_SW_RST: /* ata software reset */`
456			`REG32(base + ATA_DCR) &= ~ATA_DCR_RST;`
457			`return 0;`
458
459			`case ARG_DEV_RST: /* ata device reset */`
460			`return 0;`
461
462			`default:`
463			`return EIOCTLIARG;`
464			`}`
465			`}`
466
467
468			`default:`
469			`printf( "FIXME: Unsupported IOCTL call %1d\n", command );`
470			`return EINVAL;`
471			`}`
472			`}`
473
474
475			`unsigned long ata_calc_pio_timing(short t0, short t1, short t2, short t4, short t2i, short t9)`
476			`{`
477			`int teoc;`
478
479			`teoc = t0 - t1 - t2;`
480
481			`if (teoc < 0)`
482			`teoc = 0;`
483
484			`if (t9 > teoc)`
485			`teoc = t9;`
486
487			`if (t2i > teoc)`
488			`teoc = t2i;`
489
490			`t1 = TO_TICKS(t1);`
491			`t2 = TO_TICKS(t2);`
492			`t4 = TO_TICKS(t4);`
493			`teoc = TO_TICKS(teoc);`
494
495			`return (teoc << ATA_TEOC) \| (t4 << ATA_T4) \| (t2 << ATA_T2) \| (t1 << ATA_T1);`
496			`}`
497
498
499			`/*`
500			`A T A _ R E Q U E S T`
501			`*/`
502			`int ata_request(struct inode inode, struct file filp, struct request *request)`
503			`{`
504			`unsigned int device = MINOR(inode->i_rdev);`
505			`unsigned long base = BASE(inode);`
506			`unsigned int sector_size;`
507
508			`/* get the sector size for the current device */`
509			`sector_size = hardsect_size[device] >> 1;`
510
511			`/* set the device */`
512			`ata_ioctl(inode, filp, ATA_IOCTL_SELECT_DEVICE, device);`
513
514			`/* get the base address */`
515			`base = BASE(inode);`
516
517			`switch (request->cmd) {`
518			`case READ:`
519			`{`
520			`register unsigned long i, n;`
521			`register unsigned short rd_data;`
522			`register char *buf_ptr;`
523
524			`/* program ata-device registers */`
525			`REG32(base + ATA_DHR) = ((request->sector >> 24) & ATA_DHR_H) \| ATA_DHR_LBA;`
526			`REG32(base + ATA_CHR) = (request->sector >> 16) & 0xff;`
527			`REG32(base + ATA_CLR) = (request->sector >> 8) & 0xff;`
528			`REG32(base + ATA_SNR) = request->sector & 0xff;`
529
530			`REG32(base + ATA_SCR) = request->nr_sectors;`
531
532			`/* send 'read_sector(s)' command */`
533			`REG32(base + ATA_CR) = READ_SECTORS;`
534
535			`/* check status & error registers */`
536			`if ( ata_astatus(base) & ATA_SR_ERR)`
537			`return -1;`
538
539			`/* read data from devices and store it in the buffer */`
540			`buf_ptr = request->buffer;`
541
542			`for (n=0; n < request->nr_sectors; n++)`
543			`for (i=0; i < sector_size; i++)`
544			`{`
545			`rd_data = ata_read_dport(base);`
546
547			`/* the data is byte reversed, swap high & low bytes */`
548			`*buf_ptr++ = rd_data;`
549			`*buf_ptr++ = rd_data >> 8;`
550			`}`
551
552			`return 0;`
553			`}`
554
555
556			`case WRITE:`
557			`/* check if device may be written to */`
558			`if (filp->f_mode & FMODE_WRITE)`
559			`{`
560			`/* do the write stuff */`
561			`}`
562			`else`
563			`return EINVAL;`
564
565
566			`default:`
567			`return EINVAL;`
568			`}`
569
570			`return 0;`
571			`}`