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   1 /*
   2  *  linux/drivers/ide/pci/slc90e66.c    Version 0.14    February 8, 2007
   3  *
   4  *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
   5  *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
   6  *
   7  * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
   8  * but this keeps the ISA-Bridge and slots alive.
   9  *
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/ioport.h>
  16 #include <linux/pci.h>
  17 #include <linux/hdreg.h>
  18 #include <linux/ide.h>
  19 #include <linux/delay.h>
  20 #include <linux/init.h>
  21
  22 #include <asm/io.h>
  23
  24 static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
  25         switch(xfer_rate) {
  26                 case XFER_UDMA_4:
  27                 case XFER_UDMA_3:
  28                 case XFER_UDMA_2:
  29                 case XFER_UDMA_1:
  30                 case XFER_UDMA_0:
  31                 case XFER_MW_DMA_2:
  32                 case XFER_PIO_4:
  33                         return 4;
  34                 case XFER_MW_DMA_1:
  35                 case XFER_PIO_3:
  36                         return 3;
  37                 case XFER_SW_DMA_2:
  38                 case XFER_PIO_2:
  39                         return 2;
  40                 case XFER_MW_DMA_0:
  41                 case XFER_SW_DMA_1:
  42                 case XFER_SW_DMA_0:
  43                 case XFER_PIO_1:
  44                 case XFER_PIO_0:
  45                 case XFER_PIO_SLOW:
  46                 default:
  47                         return 0;
  48         }
  49 }
  50
  51 static void slc90e66_tune_pio (ide_drive_t *drive, u8 pio)
  52 {
  53         ide_hwif_t *hwif        = HWIF(drive);
  54         struct pci_dev *dev     = hwif->pci_dev;
  55         int is_slave            = drive->dn & 1;
  56         int master_port         = hwif->channel ? 0x42 : 0x40;
  57         int slave_port          = 0x44;
  58         unsigned long flags;
  59         u16 master_data;
  60         u8 slave_data;
  61         int control = 0;
  62                                      /* ISP  RTC */
  63         static const u8 timings[][2]= {
  64                                         { 0, 0 },
  65                                         { 0, 0 },
  66                                         { 1, 0 },
  67                                         { 2, 1 },
  68                                         { 2, 3 }, };
  69
  70         spin_lock_irqsave(&ide_lock, flags);
  71         pci_read_config_word(dev, master_port, &master_data);
  72
  73         if (pio > 1)
  74                 control |= 1;   /* Programmable timing on */
  75         if (drive->media == ide_disk)
  76                 control |= 4;   /* Prefetch, post write */
  77         if (pio > 2)
  78                 control |= 2;   /* IORDY */
  79         if (is_slave) {
  80                 master_data |=  0x4000;
  81                 master_data &= ~0x0070;
  82                 if (pio > 1) {
  83                         /* Set PPE, IE and TIME */
  84                         master_data |= control << 4;
  85                 }
  86                 pci_read_config_byte(dev, slave_port, &slave_data);
  87                 slave_data &= hwif->channel ? 0x0f : 0xf0;
  88                 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
  89                                (hwif->channel ? 4 : 0);
  90         } else {
  91                 master_data &= ~0x3307;
  92                 if (pio > 1) {
  93                         /* enable PPE, IE and TIME */
  94                         master_data |= control;
  95                 }
  96                 master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
  97         }
  98         pci_write_config_word(dev, master_port, master_data);
  99         if (is_slave)
 100                 pci_write_config_byte(dev, slave_port, slave_data);
 101         spin_unlock_irqrestore(&ide_lock, flags);
 102 }
 103
 104 static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
 105 {
 106         pio = ide_get_best_pio_mode(drive, pio, 4);
 107         slc90e66_tune_pio(drive, pio);
 108         (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
 109 }
 110
 111 static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
 112 {
 113         ide_hwif_t *hwif        = HWIF(drive);
 114         struct pci_dev *dev     = hwif->pci_dev;
 115         u8 maslave              = hwif->channel ? 0x42 : 0x40;
 116         u8 speed                = ide_rate_filter(drive, xferspeed);
 117         int sitre = 0, a_speed  = 7 << (drive->dn * 4);
 118         int u_speed = 0, u_flag = 1 << drive->dn;
 119         u16                     reg4042, reg44, reg48, reg4a;
 120
 121         pci_read_config_word(dev, maslave, &reg4042);
 122         sitre = (reg4042 & 0x4000) ? 1 : 0;
 123         pci_read_config_word(dev, 0x44, &reg44);
 124         pci_read_config_word(dev, 0x48, &reg48);
 125         pci_read_config_word(dev, 0x4a, &reg4a);
 126
 127         switch(speed) {
 128                 case XFER_UDMA_4:       u_speed = 4 << (drive->dn * 4); break;
 129                 case XFER_UDMA_3:       u_speed = 3 << (drive->dn * 4); break;
 130                 case XFER_UDMA_2:       u_speed = 2 << (drive->dn * 4); break;
 131                 case XFER_UDMA_1:       u_speed = 1 << (drive->dn * 4); break;
 132                 case XFER_UDMA_0:       u_speed = 0 << (drive->dn * 4); break;
 133                 case XFER_MW_DMA_2:
 134                 case XFER_MW_DMA_1:
 135                 case XFER_SW_DMA_2:     break;
 136                 case XFER_PIO_4:
 137                 case XFER_PIO_3:
 138                 case XFER_PIO_2:
 139                 case XFER_PIO_0:        break;
 140                 default:                return -1;
 141         }
 142
 143         if (speed >= XFER_UDMA_0) {
 144                 if (!(reg48 & u_flag))
 145                         pci_write_config_word(dev, 0x48, reg48|u_flag);
 146                 /* FIXME: (reg4a & a_speed) ? */
 147                 if ((reg4a & u_speed) != u_speed) {
 148                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 149                         pci_read_config_word(dev, 0x4a, &reg4a);
 150                         pci_write_config_word(dev, 0x4a, reg4a|u_speed);
 151                 }
 152         } else {
 153                 if (reg48 & u_flag)
 154                         pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
 155                 if (reg4a & a_speed)
 156                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 157         }
 158
 159         slc90e66_tune_pio(drive, slc90e66_dma_2_pio(speed));
 160         return ide_config_drive_speed(drive, speed);
 161 }
 162
 163 static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
 164 {
 165         drive->init_speed = 0;
 166
 167         if (ide_tune_dma(drive))
 168                 return 0;
 169
 170         if (ide_use_fast_pio(drive))
 171                 slc90e66_tune_drive(drive, 255);
 172
 173         return -1;
 174 }
 175
 176 static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
 177 {
 178         u8 reg47 = 0;
 179         u8 mask = hwif->channel ? 0x01 : 0x02;  /* bit0:Primary */
 180
 181         hwif->autodma = 0;
 182
 183         if (!hwif->irq)
 184                 hwif->irq = hwif->channel ? 15 : 14;
 185
 186         hwif->speedproc = &slc90e66_tune_chipset;
 187         hwif->tuneproc  = &slc90e66_tune_drive;
 188
 189         pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);
 190
 191         if (!hwif->dma_base) {
 192                 hwif->drives[0].autotune = 1;
 193                 hwif->drives[1].autotune = 1;
 194                 return;
 195         }
 196
 197         hwif->atapi_dma = 1;
 198         hwif->ultra_mask = 0x1f;
 199         hwif->mwdma_mask = 0x06;
 200         hwif->swdma_mask = 0x04;
 201
 202         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 203                 /* bit[0(1)]: 0:80, 1:40 */
 204                 hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 205
 206         hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;
 207
 208         if (!noautodma)
 209                 hwif->autodma = 1;
 210         hwif->drives[0].autodma = hwif->autodma;
 211         hwif->drives[1].autodma = hwif->autodma;
 212 }
 213
 214 static ide_pci_device_t slc90e66_chipset __devinitdata = {
 215         .name           = "SLC90E66",
 216         .init_hwif      = init_hwif_slc90e66,
 217         .autodma        = AUTODMA,
 218         .enablebits     = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
 219         .bootable       = ON_BOARD,
 220         .pio_mask       = ATA_PIO4,
 221 };
 222
 223 static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 224 {
 225         return ide_setup_pci_device(dev, &slc90e66_chipset);
 226 }
 227
 228 static struct pci_device_id slc90e66_pci_tbl[] = {
 229         { PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0},
 230         { 0, },
 231 };
 232 MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
 233
 234 static struct pci_driver driver = {
 235         .name           = "SLC90e66_IDE",
 236         .id_table       = slc90e66_pci_tbl,
 237         .probe          = slc90e66_init_one,
 238 };
 239
 240 static int __init slc90e66_ide_init(void)
 241 {
 242         return ide_pci_register_driver(&driver);
 243 }
 244
 245 module_init(slc90e66_ide_init);
 246
 247 MODULE_AUTHOR("Andre Hedrick");
 248 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
 249 MODULE_LICENSE("GPL");