drivers/ide/pci/it8213.c

   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/hdreg.h>
  14 #include <linux/ide.h>
  15 #include <linux/init.h>
  16
  17 /**
  18  *      it8213_set_pio_mode     -       set host controller for PIO mode
  19  *      @drive: drive
  20  *      @pio: PIO mode number
  21  *
  22  *      Set the interface PIO mode.
  23  */
  24
  25 static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
  26 {
  27         ide_hwif_t *hwif        = HWIF(drive);
  28         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  29         int is_slave            = drive->dn & 1;
  30         int master_port         = 0x40;
  31         int slave_port          = 0x44;
  32         unsigned long flags;
  33         u16 master_data;
  34         u8 slave_data;
  35         static DEFINE_SPINLOCK(tune_lock);
  36         int control = 0;
  37
  38         static const u8 timings[][2] = {
  39                                         { 0, 0 },
  40                                         { 0, 0 },
  41                                         { 1, 0 },
  42                                         { 2, 1 },
  43                                         { 2, 3 }, };
  44
  45         spin_lock_irqsave(&tune_lock, flags);
  46         pci_read_config_word(dev, master_port, &master_data);
  47
  48         if (pio > 1)
  49                 control |= 1;   /* Programmable timing on */
  50         if (drive->media != ide_disk)
  51                 control |= 4;   /* ATAPI */
  52         if (pio > 2)
  53                 control |= 2;   /* IORDY */
  54         if (is_slave) {
  55                 master_data |=  0x4000;
  56                 master_data &= ~0x0070;
  57                 if (pio > 1)
  58                         master_data = master_data | (control << 4);
  59                 pci_read_config_byte(dev, slave_port, &slave_data);
  60                 slave_data = slave_data & 0xf0;
  61                 slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
  62         } else {
  63                 master_data &= ~0x3307;
  64                 if (pio > 1)
  65                         master_data = master_data | control;
  66                 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
  67         }
  68         pci_write_config_word(dev, master_port, master_data);
  69         if (is_slave)
  70                 pci_write_config_byte(dev, slave_port, slave_data);
  71         spin_unlock_irqrestore(&tune_lock, flags);
  72 }
  73
  74 /**
  75  *      it8213_set_dma_mode     -       set host controller for DMA mode
  76  *      @drive: drive
  77  *      @speed: DMA mode
  78  *
  79  *      Tune the ITE chipset for the DMA mode.
  80  */
  81
  82 static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
  83 {
  84         ide_hwif_t *hwif        = HWIF(drive);
  85         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  86         u8 maslave              = 0x40;
  87         int a_speed             = 3 << (drive->dn * 4);
  88         int u_flag              = 1 << drive->dn;
  89         int v_flag              = 0x01 << drive->dn;
  90         int w_flag              = 0x10 << drive->dn;
  91         int u_speed             = 0;
  92         u16                     reg4042, reg4a;
  93         u8                      reg48, reg54, reg55;
  94
  95         pci_read_config_word(dev, maslave, &reg4042);
  96         pci_read_config_byte(dev, 0x48, &reg48);
  97         pci_read_config_word(dev, 0x4a, &reg4a);
  98         pci_read_config_byte(dev, 0x54, &reg54);
  99         pci_read_config_byte(dev, 0x55, &reg55);
 100
 101         if (speed >= XFER_UDMA_0) {
 102                 u8 udma = speed - XFER_UDMA_0;
 103
 104                 u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
 105
 106                 if (!(reg48 & u_flag))
 107                         pci_write_config_byte(dev, 0x48, reg48 | u_flag);
 108                 if (speed >= XFER_UDMA_5)
 109                         pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
 110                 else
 111                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 112
 113                 if ((reg4a & a_speed) != u_speed)
 114                         pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
 115                 if (speed > XFER_UDMA_2) {
 116                         if (!(reg54 & v_flag))
 117                                 pci_write_config_byte(dev, 0x54, reg54 | v_flag);
 118                 } else
 119                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 120         } else {
 121                 const u8 mwdma_to_pio[] = { 0, 3, 4 };
 122                 u8 pio;
 123
 124                 if (reg48 & u_flag)
 125                         pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
 126                 if (reg4a & a_speed)
 127                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 128                 if (reg54 & v_flag)
 129                         pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
 130                 if (reg55 & w_flag)
 131                         pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
 132
 133                 if (speed >= XFER_MW_DMA_0)
 134                         pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
 135                 else
 136                         pio = 2; /* only SWDMA2 is allowed */
 137
 138                 it8213_set_pio_mode(drive, pio);
 139         }
 140 }
 141
 142 static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
 143 {
 144         struct pci_dev *dev = to_pci_dev(hwif->dev);
 145         u8 reg42h = 0;
 146
 147         pci_read_config_byte(dev, 0x42, &reg42h);
 148
 149         return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 150 }
 151
 152 static const struct ide_port_ops it8213_port_ops = {
 153         .set_pio_mode           = it8213_set_pio_mode,
 154         .set_dma_mode           = it8213_set_dma_mode,
 155         .cable_detect           = it8213_cable_detect,
 156 };
 157
 158 #define DECLARE_ITE_DEV(name_str)                       \
 159         {                                               \
 160                 .name           = name_str,             \
 161                 .enablebits     = { {0x41, 0x80, 0x80} }, \
 162                 .port_ops       = &it8213_port_ops,     \
 163                 .host_flags     = IDE_HFLAG_SINGLE,     \
 164                 .pio_mask       = ATA_PIO4,             \
 165                 .swdma_mask     = ATA_SWDMA2_ONLY,      \
 166                 .mwdma_mask     = ATA_MWDMA12_ONLY,     \
 167                 .udma_mask      = ATA_UDMA6,            \
 168         }
 169
 170 static const struct ide_port_info it8213_chipsets[] __devinitdata = {
 171         /* 0 */ DECLARE_ITE_DEV("IT8213"),
 172 };
 173
 174
 175 /**
 176  *      it8213_init_one -       pci layer discovery entry
 177  *      @dev: PCI device
 178  *      @id: ident table entry
 179  *
 180  *      Called by the PCI code when it finds an ITE8213 controller. As
 181  *      this device follows the standard interfaces we can use the
 182  *      standard helper functions to do almost all the work for us.
 183  */
 184
 185 static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 186 {
 187         return ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]);
 188 }
 189
 190 static const struct pci_device_id it8213_pci_tbl[] = {
 191         { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
 192         { 0, },
 193 };
 194
 195 MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
 196
 197 static struct pci_driver driver = {
 198         .name           = "ITE8213_IDE",
 199         .id_table       = it8213_pci_tbl,
 200         .probe          = it8213_init_one,
 201 };
 202
 203 static int __init it8213_ide_init(void)
 204 {
 205         return ide_pci_register_driver(&driver);
 206 }
 207
 208 module_init(it8213_ide_init);
 209
 210 MODULE_AUTHOR("Jack Lee, Alan Cox");
 211 MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
 212 MODULE_LICENSE("GPL");