drivers/ide/pci/slc90e66.c

   1 /*
   2  *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
   3  *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
   4  *
   5  * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
   6  * but this keeps the ISA-Bridge and slots alive.
   7  *
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/ioport.h>
  14 #include <linux/pci.h>
  15 #include <linux/hdreg.h>
  16 #include <linux/ide.h>
  17 #include <linux/delay.h>
  18 #include <linux/init.h>
  19
  20 #include <asm/io.h>
  21
  22 static DEFINE_SPINLOCK(slc90e66_lock);
  23
  24 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
  25 {
  26         ide_hwif_t *hwif        = HWIF(drive);
  27         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  28         int is_slave            = drive->dn & 1;
  29         int master_port         = hwif->channel ? 0x42 : 0x40;
  30         int slave_port          = 0x44;
  31         unsigned long flags;
  32         u16 master_data;
  33         u8 slave_data;
  34         int control = 0;
  35                                      /* ISP  RTC */
  36         static const u8 timings[][2]= {
  37                                         { 0, 0 },
  38                                         { 0, 0 },
  39                                         { 1, 0 },
  40                                         { 2, 1 },
  41                                         { 2, 3 }, };
  42
  43         spin_lock_irqsave(&slc90e66_lock, flags);
  44         pci_read_config_word(dev, master_port, &master_data);
  45
  46         if (pio > 1)
  47                 control |= 1;   /* Programmable timing on */
  48         if (drive->media == ide_disk)
  49                 control |= 4;   /* Prefetch, post write */
  50         if (pio > 2)
  51                 control |= 2;   /* IORDY */
  52         if (is_slave) {
  53                 master_data |=  0x4000;
  54                 master_data &= ~0x0070;
  55                 if (pio > 1) {
  56                         /* Set PPE, IE and TIME */
  57                         master_data |= control << 4;
  58                 }
  59                 pci_read_config_byte(dev, slave_port, &slave_data);
  60                 slave_data &= hwif->channel ? 0x0f : 0xf0;
  61                 slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
  62                                (hwif->channel ? 4 : 0);
  63         } else {
  64                 master_data &= ~0x3307;
  65                 if (pio > 1) {
  66                         /* enable PPE, IE and TIME */
  67                         master_data |= control;
  68                 }
  69                 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(&slc90e66_lock, flags);
  75 }
  76
  77 static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
  78 {
  79         ide_hwif_t *hwif        = HWIF(drive);
  80         struct pci_dev *dev     = to_pci_dev(hwif->dev);
  81         u8 maslave              = hwif->channel ? 0x42 : 0x40;
  82         int sitre = 0, a_speed  = 7 << (drive->dn * 4);
  83         int u_speed = 0, u_flag = 1 << drive->dn;
  84         u16                     reg4042, reg44, reg48, reg4a;
  85
  86         pci_read_config_word(dev, maslave, &reg4042);
  87         sitre = (reg4042 & 0x4000) ? 1 : 0;
  88         pci_read_config_word(dev, 0x44, &reg44);
  89         pci_read_config_word(dev, 0x48, &reg48);
  90         pci_read_config_word(dev, 0x4a, &reg4a);
  91
  92         if (speed >= XFER_UDMA_0) {
  93                 u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
  94
  95                 if (!(reg48 & u_flag))
  96                         pci_write_config_word(dev, 0x48, reg48|u_flag);
  97                 /* FIXME: (reg4a & a_speed) ? */
  98                 if ((reg4a & u_speed) != u_speed) {
  99                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 100                         pci_read_config_word(dev, 0x4a, &reg4a);
 101                         pci_write_config_word(dev, 0x4a, reg4a|u_speed);
 102                 }
 103         } else {
 104                 const u8 mwdma_to_pio[] = { 0, 3, 4 };
 105                 u8 pio;
 106
 107                 if (reg48 & u_flag)
 108                         pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
 109                 if (reg4a & a_speed)
 110                         pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
 111
 112                 if (speed >= XFER_MW_DMA_0)
 113                         pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
 114                 else
 115                         pio = 2; /* only SWDMA2 is allowed */
 116
 117                 slc90e66_set_pio_mode(drive, pio);
 118         }
 119 }
 120
 121 static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
 122 {
 123         struct pci_dev *dev = to_pci_dev(hwif->dev);
 124         u8 reg47 = 0;
 125         u8 mask = hwif->channel ? 0x01 : 0x02;  /* bit0:Primary */
 126
 127         hwif->set_pio_mode = &slc90e66_set_pio_mode;
 128         hwif->set_dma_mode = &slc90e66_set_dma_mode;
 129
 130         pci_read_config_byte(dev, 0x47, &reg47);
 131
 132         if (hwif->dma_base == 0)
 133                 return;
 134
 135         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 136                 /* bit[0(1)]: 0:80, 1:40 */
 137                 hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
 138 }
 139
 140 static const struct ide_port_info slc90e66_chipset __devinitdata = {
 141         .name           = "SLC90E66",
 142         .init_hwif      = init_hwif_slc90e66,
 143         .enablebits     = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
 144         .host_flags     = IDE_HFLAG_LEGACY_IRQS | IDE_HFLAG_BOOTABLE,
 145         .pio_mask       = ATA_PIO4,
 146         .swdma_mask     = ATA_SWDMA2_ONLY,
 147         .mwdma_mask     = ATA_MWDMA12_ONLY,
 148         .udma_mask      = ATA_UDMA4,
 149 };
 150
 151 static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 152 {
 153         return ide_setup_pci_device(dev, &slc90e66_chipset);
 154 }
 155
 156 static const struct pci_device_id slc90e66_pci_tbl[] = {
 157         { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
 158         { 0, },
 159 };
 160 MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
 161
 162 static struct pci_driver driver = {
 163         .name           = "SLC90e66_IDE",
 164         .id_table       = slc90e66_pci_tbl,
 165         .probe          = slc90e66_init_one,
 166 };
 167
 168 static int __init slc90e66_ide_init(void)
 169 {
 170         return ide_pci_register_driver(&driver);
 171 }
 172
 173 module_init(slc90e66_ide_init);
 174
 175 MODULE_AUTHOR("Andre Hedrick");
 176 MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
 177 MODULE_LICENSE("GPL");