drivers/ide/pci/jmicron.c

   1
   2 /*
   3  * Copyright (C) 2006           Red Hat <alan@redhat.com>
   4  *
   5  *  May be copied or modified under the terms of the GNU General Public License
   6  */
   7
   8 #include <linux/types.h>
   9 #include <linux/module.h>
  10 #include <linux/pci.h>
  11 #include <linux/delay.h>
  12 #include <linux/hdreg.h>
  13 #include <linux/ide.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/io.h>
  17
  18 typedef enum {
  19         PORT_PATA0 = 0,
  20         PORT_PATA1 = 1,
  21         PORT_SATA = 2,
  22 } port_type;
  23
  24 /**
  25  *      ata66_jmicron           -       Cable check
  26  *      @hwif: IDE port
  27  *
  28  *      Returns the cable type.
  29  */
  30
  31 static u8 __devinit ata66_jmicron(ide_hwif_t *hwif)
  32 {
  33         struct pci_dev *pdev = hwif->pci_dev;
  34
  35         u32 control;
  36         u32 control5;
  37
  38         int port = hwif->channel;
  39         port_type port_map[2];
  40
  41         pci_read_config_dword(pdev, 0x40, &control);
  42
  43         /* There are two basic mappings. One has the two SATA ports merged
  44            as master/slave and the secondary as PATA, the other has only the
  45            SATA port mapped */
  46         if (control & (1 << 23)) {
  47                 port_map[0] = PORT_SATA;
  48                 port_map[1] = PORT_PATA0;
  49         } else {
  50                 port_map[0] = PORT_SATA;
  51                 port_map[1] = PORT_SATA;
  52         }
  53
  54         /* The 365/366 may have this bit set to map the second PATA port
  55            as the internal primary channel */
  56         pci_read_config_dword(pdev, 0x80, &control5);
  57         if (control5 & (1<<24))
  58                 port_map[0] = PORT_PATA1;
  59
  60         /* The two ports may then be logically swapped by the firmware */
  61         if (control & (1 << 22))
  62                 port = port ^ 1;
  63
  64         /*
  65          *      Now we know which physical port we are talking about we can
  66          *      actually do our cable checking etc. Thankfully we don't need
  67          *      to do the plumbing for other cases.
  68          */
  69         switch (port_map[port])
  70         {
  71         case PORT_PATA0:
  72                 if (control & (1 << 3)) /* 40/80 pin primary */
  73                         return ATA_CBL_PATA40;
  74                 return ATA_CBL_PATA80;
  75         case PORT_PATA1:
  76                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
  77                         return ATA_CBL_PATA40;
  78                 return ATA_CBL_PATA80;
  79         case PORT_SATA:
  80                 break;
  81         }
  82         /* Avoid bogus "control reaches end of non-void function" */
  83         return ATA_CBL_PATA80;
  84 }
  85
  86 static void jmicron_set_pio_mode(ide_drive_t *drive, const u8 pio)
  87 {
  88         ide_config_drive_speed(drive, XFER_PIO_0 + pio);
  89 }
  90
  91 /**
  92  *      jmicron_tune_chipset    -       set controller timings
  93  *      @drive: Drive to set up
  94  *      @speed: speed we want to achieve
  95  *
  96  *      As the JMicron snoops for timings all we actually need to do is
  97  *      set the transfer mode on the device.
  98  */
  99
 100 static int jmicron_tune_chipset(ide_drive_t *drive, const u8 speed)
 101 {
 102         return ide_config_drive_speed(drive, speed);
 103 }
 104
 105 /**
 106  *      jmicron_configure_drive_for_dma -       set up for DMA transfers
 107  *      @drive: drive we are going to set up
 108  *
 109  *      As the JMicron snoops for timings all we actually need to do is
 110  *      make sure we don't set an invalid mode.
 111  */
 112
 113 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
 114 {
 115         if (ide_tune_dma(drive))
 116                 return 0;
 117
 118         ide_set_max_pio(drive);
 119
 120         return -1;
 121 }
 122
 123 /**
 124  *      init_hwif_jmicron       -       set up hwif structs
 125  *      @hwif: interface to set up
 126  *
 127  *      Minimal set up is required for the Jmicron hardware.
 128  */
 129
 130 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 131 {
 132         hwif->speedproc = &jmicron_tune_chipset;
 133         hwif->set_pio_mode = &jmicron_set_pio_mode;
 134
 135         hwif->drives[0].autotune = 1;
 136         hwif->drives[1].autotune = 1;
 137
 138         if (!hwif->dma_base)
 139                 goto fallback;
 140
 141         hwif->atapi_dma = 1;
 142         hwif->ultra_mask = 0x7f;
 143         hwif->mwdma_mask = 0x07;
 144
 145         hwif->ide_dma_check = &jmicron_config_drive_for_dma;
 146
 147         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 148                 hwif->cbl = ata66_jmicron(hwif);
 149
 150         hwif->autodma = 1;
 151         hwif->drives[0].autodma = hwif->autodma;
 152         hwif->drives[1].autodma = hwif->autodma;
 153         return;
 154 fallback:
 155         hwif->autodma = 0;
 156         return;
 157 }
 158
 159 static ide_pci_device_t jmicron_chipset __devinitdata = {
 160         .name           = "JMB",
 161         .init_hwif      = init_hwif_jmicron,
 162         .autodma        = AUTODMA,
 163         .bootable       = ON_BOARD,
 164         .enablebits     = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
 165         .pio_mask       = ATA_PIO5,
 166 };
 167
 168 /**
 169  *      jmicron_init_one        -       pci layer discovery entry
 170  *      @dev: PCI device
 171  *      @id: ident table entry
 172  *
 173  *      Called by the PCI code when it finds a Jmicron controller.
 174  *      We then use the IDE PCI generic helper to do most of the work.
 175  */
 176
 177 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 178 {
 179         ide_setup_pci_device(dev, &jmicron_chipset);
 180         return 0;
 181 }
 182
 183 /* All JMB PATA controllers have and will continue to have the same
 184  * interface.  Matching vendor and device class is enough for all
 185  * current and future controllers if the controller is programmed
 186  * properly.
 187  *
 188  * If libata is configured, jmicron PCI quirk programs the controller
 189  * into the correct mode.  If libata isn't configured, match known
 190  * device IDs too to maintain backward compatibility.
 191  */
 192 static struct pci_device_id jmicron_pci_tbl[] = {
 193 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
 194         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
 195         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
 196         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
 197         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
 198         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
 199 #endif
 200         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 201           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
 202         { 0, },
 203 };
 204
 205 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 206
 207 static struct pci_driver driver = {
 208         .name           = "JMicron IDE",
 209         .id_table       = jmicron_pci_tbl,
 210         .probe          = jmicron_init_one,
 211 };
 212
 213 static int __init jmicron_ide_init(void)
 214 {
 215         return ide_pci_register_driver(&driver);
 216 }
 217
 218 module_init(jmicron_ide_init);
 219
 220 MODULE_AUTHOR("Alan Cox");
 221 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
 222 MODULE_LICENSE("GPL");