ATAController.h

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/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __SERVER_ATA_ATACONTROLLER_H
#define __SERVER_ATA_ATACONTROLLER_H
 
#include <FreeNOS/User.h>
#include <List.h>
#include <Device.h>
 
#define ATA_BASE_CMD0   0x1f0
 
#define ATA_BASE_CMD1   0x170
 
#define ATA_BASE_CTL0   0x3f6
 
#define ATA_BASE_CTL1   0x376
 
#define ATA_REG_DATA    0
 
#define ATA_REG_ERROR   1
 
#define ATA_REG_COUNT   2
 
#define ATA_REG_ADDR0   3
 
#define ATA_REG_ADDR1   4
 
#define ATA_REG_ADDR2   5
 
#define ATA_REG_SELECT  6
 
#define ATA_REG_CMD 7
 
#define ATA_REG_STATUS  7
 
#define ATA_STATUS_ERROR 0x01
 
#define ATA_STATUS_DATA  0x08
 
#define ATA_STATUS_BUSY  0x80
 
#define ATA_REG_RESET 0x4
 
#define ATA_REG_INTR  0x2
 
#define ATA_SEL_MASTER      0xa0
 
#define ATA_SEL_MASTER_28   0xe0
 
#define ATA_SEL_MASTER_48   0x40
 
#define ATA_CMD_IDENTIFY 0xec
 
#define ATA_CMD_READ     0x20
 
#define IDENTIFY_TEXT_SWAP(field,size) \
    \
    ({ \
    u8 tmp; \
        \
        for (int i = 0; i < (size); i+=2) \
        { \
        tmp = (field)[i]; \
        (field)[i]   = (field)[i+1]; \
        (field)[i+1] = tmp; \
    } \
    })
 
typedef struct IdentifyData
{
    u16 type;
    u16 reserved1[9];
    u8  serial[20];
    u16 reserved2[3];
    u8  firmware[8];
    u8  model[40];
    u16 maxTransfer;
    u16 trustedFeatures;
    u16 capabilities[2];
    u16 reserved3[8];
    u32 sectors28;
    u16 reserved4[18];
    u16 majorRevision;
    u16 minorRevision;
    u16 supported[6];
    u16 reserved5[12];
    u64 sectors48;
    u16 reserved6[2];
    u16 sectorSize;
}
IdentifyData;
 
typedef struct ATADrive
{
    IdentifyData identity;
 
    Size sectors;
}
ATADrive;
 
class ATAController : public Device
{
  public:
 
    ATAController(const u32 inode);
 
    virtual FileSystem::Result initialize();
 
    virtual FileSystem::Result read(IOBuffer & buffer,
                                    Size & size,
                                    const Size offset);
 
    virtual FileSystem::Result interrupt(const Size vector);
 
  private:
 
    void pollReady(bool noData = false);
 
  private:
 
    List<ATADrive *> drives;
 
    Arch::IO m_io;
};
 
#endif /* __SERVER_ATA_ATACONTROLLER_H */