linux/drivers/ide/pci/it8213.c
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   1/*
   2 * ITE 8213 IDE driver
   3 *
   4 * Copyright (C) 2006 Jack Lee
   5 * Copyright (C) 2006 Alan Cox
   6 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/types.h>
  11#include <linux/module.h>
  12#include <linux/pci.h>
  13#include <linux/delay.h>
  14#include <linux/hdreg.h>
  15#include <linux/ide.h>
  16#include <linux/init.h>
  17
  18#include <asm/io.h>
  19
  20/**
  21 *      it8213_set_pio_mode     -       set host controller for PIO mode
  22 *      @drive: drive
  23 *      @pio: PIO mode number
  24 *
  25 *      Set the interface PIO mode.
  26 */
  27
  28static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
  29{
  30        ide_hwif_t *hwif        = HWIF(drive);
  31        struct pci_dev *dev     = hwif->pci_dev;
  32        int is_slave            = drive->dn & 1;
  33        int master_port         = 0x40;
  34        int slave_port          = 0x44;
  35        unsigned long flags;
  36        u16 master_data;
  37        u8 slave_data;
  38        static DEFINE_SPINLOCK(tune_lock);
  39        int control = 0;
  40
  41        static const u8 timings[][2]= {
  42                                        { 0, 0 },
  43                                        { 0, 0 },
  44                                        { 1, 0 },
  45                                        { 2, 1 },
  46                                        { 2, 3 }, };
  47
  48        spin_lock_irqsave(&tune_lock, flags);
  49        pci_read_config_word(dev, master_port, &master_data);
  50
  51        if (pio > 1)
  52                control |= 1;   /* Programmable timing on */
  53        if (drive->media != ide_disk)
  54                control |= 4;   /* ATAPI */
  55        if (pio > 2)
  56                control |= 2;   /* IORDY */
  57        if (is_slave) {
  58                master_data |=  0x4000;
  59                master_data &= ~0x0070;
  60                if (pio > 1)
  61                        master_data = master_data | (control << 4);
  62                pci_read_config_byte(dev, slave_port, &slave_data);
  63                slave_data = slave_data & 0xf0;
  64                slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
  65        } else {
  66                master_data &= ~0x3307;
  67                if (pio > 1)
  68                        master_data = master_data | control;
  69                master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
  70        }
  71        pci_write_config_word(dev, master_port, master_data);
  72        if (is_slave)
  73                pci_write_config_byte(dev, slave_port, slave_data);
  74        spin_unlock_irqrestore(&tune_lock, flags);
  75}
  76
  77/**
  78 *      it8213_set_dma_mode     -       set host controller for DMA mode
  79 *      @drive: drive
  80 *      @speed: DMA mode
  81 *
  82 *      Tune the ITE chipset for the DMA mode.
  83 */
  84
  85static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
  86{
  87        ide_hwif_t *hwif        = HWIF(drive);
  88        struct pci_dev *dev     = hwif->pci_dev;
  89        u8 maslave              = 0x40;
  90        int a_speed             = 3 << (drive->dn * 4);
  91        int u_flag              = 1 << drive->dn;
  92        int v_flag              = 0x01 << drive->dn;
  93        int w_flag              = 0x10 << drive->dn;
  94        int u_speed             = 0;
  95        u16                     reg4042, reg4a;
  96        u8                      reg48, reg54, reg55;
  97
  98        pci_read_config_word(dev, maslave, &reg4042);
  99        pci_read_config_byte(dev, 0x48, &reg48);
 100        pci_read_config_word(dev, 0x4a, &reg4a);
 101        pci_read_config_byte(dev, 0x54, &reg54);
 102        pci_read_config_byte(dev, 0x55, &reg55);
 103
 104        switch(speed) {
 105                case XFER_UDMA_6:
 106                case XFER_UDMA_4:
 107                case XFER_UDMA_2:       u_speed = 2 << (drive->dn * 4); break;
 108                case XFER_UDMA_5:
 109                case XFER_UDMA_3:
 110                case XFER_UDMA_1:       u_speed = 1 << (drive->dn * 4); break;
 111                case XFER_UDMA_0:       u_speed = 0 << (drive->dn * 4); break;
 112                        break;
 113                case XFER_MW_DMA_2:
 114                case XFER_MW_DMA_1:
 115                case XFER_SW_DMA_2:
 116                        break;
 117                default:
 118                        return;
 119        }
 120
 121        if (speed >= XFER_UDMA_0) {
 122                if (!(reg48 & u_flag))
 123                        pci_write_config_byte(dev, 0x48, reg48 | u_flag);
 124                if (speed >= XFER_UDMA_5) {
 125                        pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
 126                } else {
 127                        pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 128                }
 129
 130                if ((reg4a & a_speed) != u_speed)
 131                        pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
 132                if (speed > XFER_UDMA_2) {
 133                        if (!(reg54 & v_flag))
 134                                pci_write_config_byte(dev, 0x54, reg54 | v_flag);
 135                } else
 136                        pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 137        } else {
 138                const u8 mwdma_to_pio[] = { 0, 3, 4 };
 139                u8 pio;
 140
 141                if (reg48 & u_flag)
 142                        pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
 143                if (reg4a & a_speed)
 144                        pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 145                if (reg54 & v_flag)
 146                        pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 147                if (reg55 & w_flag)
 148                        pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 149
 150                if (speed >= XFER_MW_DMA_0)
 151                        pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
 152                else
 153                        pio = 2; /* only SWDMA2 is allowed */
 154
 155                it8213_set_pio_mode(drive, pio);
 156        }
 157}
 158
 159/**
 160 *      init_hwif_it8213        -       set up hwif structs
 161 *      @hwif: interface to set up
 162 *
 163 *      We do the basic set up of the interface structure.
 164 */
 165
 166static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
 167{
 168        u8 reg42h = 0;
 169
 170        hwif->set_dma_mode = &it8213_set_dma_mode;
 171        hwif->set_pio_mode = &it8213_set_pio_mode;
 172
 173        if (!hwif->dma_base)
 174                return;
 175
 176        pci_read_config_byte(hwif->pci_dev, 0x42, &reg42h);
 177
 178        if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 179                hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 180}
 181
 182
 183#define DECLARE_ITE_DEV(name_str)                       \
 184        {                                               \
 185                .name           = name_str,             \
 186                .init_hwif      = init_hwif_it8213,     \
 187                .enablebits     = {{0x41,0x80,0x80}}, \
 188                .host_flags     = IDE_HFLAG_SINGLE |    \
 189                                  IDE_HFLAG_BOOTABLE,   \
 190                .pio_mask       = ATA_PIO4,             \
 191                .swdma_mask     = ATA_SWDMA2_ONLY,      \
 192                .mwdma_mask     = ATA_MWDMA12_ONLY,     \
 193                .udma_mask      = ATA_UDMA6,            \
 194        }
 195
 196static const struct ide_port_info it8213_chipsets[] __devinitdata = {
 197        /* 0 */ DECLARE_ITE_DEV("IT8213"),
 198};
 199
 200
 201/**
 202 *      it8213_init_one -       pci layer discovery entry
 203 *      @dev: PCI device
 204 *      @id: ident table entry
 205 *
 206 *      Called by the PCI code when it finds an ITE8213 controller. As
 207 *      this device follows the standard interfaces we can use the
 208 *      standard helper functions to do almost all the work for us.
 209 */
 210
 211static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 212{
 213        ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
 214        return 0;
 215}
 216
 217static const struct pci_device_id it8213_pci_tbl[] = {
 218        { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
 219        { 0, },
 220};
 221
 222MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
 223
 224static struct pci_driver driver = {
 225        .name           = "ITE8213_IDE",
 226        .id_table       = it8213_pci_tbl,
 227        .probe          = it8213_init_one,
 228};
 229
 230static int __init it8213_ide_init(void)
 231{
 232        return ide_pci_register_driver(&driver);
 233}
 234
 235module_init(it8213_ide_init);
 236
 237MODULE_AUTHOR("Jack Lee, Alan Cox");
 238MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
 239MODULE_LICENSE("GPL");
 240
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