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 }
  89
  90 /**
  91  *      jmicron_set_dma_mode    -       set host controller for DMA mode
  92  *      @drive: drive
  93  *      @mode: DMA mode
  94  *
  95  *      As the JMicron snoops for timings we don't need to do anything here.
  96  */
  97
  98 static void jmicron_set_dma_mode(ide_drive_t *drive, const u8 mode)
  99 {
 100 }
 101
 102 /**
 103  *      jmicron_configure_drive_for_dma -       set up for DMA transfers
 104  *      @drive: drive we are going to set up
 105  *
 106  *      As the JMicron snoops for timings all we actually need to do is
 107  *      make sure we don't set an invalid mode.
 108  */
 109
 110 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
 111 {
 112         if (ide_tune_dma(drive))
 113                 return 0;
 114
 115         ide_set_max_pio(drive);
 116
 117         return -1;
 118 }
 119
 120 /**
 121  *      init_hwif_jmicron       -       set up hwif structs
 122  *      @hwif: interface to set up
 123  *
 124  *      Minimal set up is required for the Jmicron hardware.
 125  */
 126
 127 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 128 {
 129         hwif->set_pio_mode = &jmicron_set_pio_mode;
 130         hwif->set_dma_mode = &jmicron_set_dma_mode;
 131
 132         hwif->drives[0].autotune = 1;
 133         hwif->drives[1].autotune = 1;
 134
 135         if (!hwif->dma_base)
 136                 goto fallback;
 137
 138         hwif->atapi_dma = 1;
 139         hwif->ultra_mask = 0x7f;
 140         hwif->mwdma_mask = 0x07;
 141
 142         hwif->ide_dma_check = &jmicron_config_drive_for_dma;
 143
 144         if (hwif->cbl != ATA_CBL_PATA40_SHORT)
 145                 hwif->cbl = ata66_jmicron(hwif);
 146
 147         hwif->autodma = 1;
 148         hwif->drives[0].autodma = hwif->autodma;
 149         hwif->drives[1].autodma = hwif->autodma;
 150         return;
 151 fallback:
 152         hwif->autodma = 0;
 153         return;
 154 }
 155
 156 static ide_pci_device_t jmicron_chipset __devinitdata = {
 157         .name           = "JMB",
 158         .init_hwif      = init_hwif_jmicron,
 159         .autodma        = AUTODMA,
 160         .bootable       = ON_BOARD,
 161         .enablebits     = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
 162         .pio_mask       = ATA_PIO5,
 163 };
 164
 165 /**
 166  *      jmicron_init_one        -       pci layer discovery entry
 167  *      @dev: PCI device
 168  *      @id: ident table entry
 169  *
 170  *      Called by the PCI code when it finds a Jmicron controller.
 171  *      We then use the IDE PCI generic helper to do most of the work.
 172  */
 173
 174 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 175 {
 176         ide_setup_pci_device(dev, &jmicron_chipset);
 177         return 0;
 178 }
 179
 180 /* All JMB PATA controllers have and will continue to have the same
 181  * interface.  Matching vendor and device class is enough for all
 182  * current and future controllers if the controller is programmed
 183  * properly.
 184  *
 185  * If libata is configured, jmicron PCI quirk programs the controller
 186  * into the correct mode.  If libata isn't configured, match known
 187  * device IDs too to maintain backward compatibility.
 188  */
 189 static struct pci_device_id jmicron_pci_tbl[] = {
 190 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
 191         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
 192         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
 193         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
 194         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
 195         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
 196 #endif
 197         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 198           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
 199         { 0, },
 200 };
 201
 202 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 203
 204 static struct pci_driver driver = {
 205         .name           = "JMicron IDE",
 206         .id_table       = jmicron_pci_tbl,
 207         .probe          = jmicron_init_one,
 208 };
 209
 210 static int __init jmicron_ide_init(void)
 211 {
 212         return ide_pci_register_driver(&driver);
 213 }
 214
 215 module_init(jmicron_ide_init);
 216
 217 MODULE_AUTHOR("Alan Cox");
 218 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
 219 MODULE_LICENSE("GPL");