drivers/ide/jmicron.c

   1
   2 /*
   3  * Copyright (C) 2006           Red Hat
   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/ide.h>
  12 #include <linux/init.h>
  13
  14 #define DRV_NAME "jmicron"
  15
  16 typedef enum {
  17         PORT_PATA0 = 0,
  18         PORT_PATA1 = 1,
  19         PORT_SATA = 2,
  20 } port_type;
  21
  22 /**
  23  *      jmicron_cable_detect    -       cable detection
  24  *      @hwif: IDE port
  25  *
  26  *      Returns the cable type.
  27  */
  28
  29 static u8 jmicron_cable_detect(ide_hwif_t *hwif)
  30 {
  31         struct pci_dev *pdev = to_pci_dev(hwif->dev);
  32
  33         u32 control;
  34         u32 control5;
  35
  36         int port = hwif->channel;
  37         port_type port_map[2];
  38
  39         pci_read_config_dword(pdev, 0x40, &control);
  40
  41         /* There are two basic mappings. One has the two SATA ports merged
  42            as master/slave and the secondary as PATA, the other has only the
  43            SATA port mapped */
  44         if (control & (1 << 23)) {
  45                 port_map[0] = PORT_SATA;
  46                 port_map[1] = PORT_PATA0;
  47         } else {
  48                 port_map[0] = PORT_SATA;
  49                 port_map[1] = PORT_SATA;
  50         }
  51
  52         /* The 365/366 may have this bit set to map the second PATA port
  53            as the internal primary channel */
  54         pci_read_config_dword(pdev, 0x80, &control5);
  55         if (control5 & (1<<24))
  56                 port_map[0] = PORT_PATA1;
  57
  58         /* The two ports may then be logically swapped by the firmware */
  59         if (control & (1 << 22))
  60                 port = port ^ 1;
  61
  62         /*
  63          *      Now we know which physical port we are talking about we can
  64          *      actually do our cable checking etc. Thankfully we don't need
  65          *      to do the plumbing for other cases.
  66          */
  67         switch (port_map[port]) {
  68         case PORT_PATA0:
  69                 if (control & (1 << 3)) /* 40/80 pin primary */
  70                         return ATA_CBL_PATA40;
  71                 return ATA_CBL_PATA80;
  72         case PORT_PATA1:
  73                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
  74                         return ATA_CBL_PATA40;
  75                 return ATA_CBL_PATA80;
  76         case PORT_SATA:
  77                 break;
  78         }
  79         /* Avoid bogus "control reaches end of non-void function" */
  80         return ATA_CBL_PATA80;
  81 }
  82
  83 static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  84 {
  85 }
  86
  87 /**
  88  *      jmicron_set_dma_mode    -       set host controller for DMA mode
  89  *      @hwif: port
  90  *      @drive: drive
  91  *
  92  *      As the JMicron snoops for timings we don't need to do anything here.
  93  */
  94
  95 static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
  96 {
  97 }
  98
  99 static const struct ide_port_ops jmicron_port_ops = {
 100         .set_pio_mode           = jmicron_set_pio_mode,
 101         .set_dma_mode           = jmicron_set_dma_mode,
 102         .cable_detect           = jmicron_cable_detect,
 103 };
 104
 105 static const struct ide_port_info jmicron_chipset = {
 106         .name           = DRV_NAME,
 107         .enablebits     = { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
 108         .port_ops       = &jmicron_port_ops,
 109         .pio_mask       = ATA_PIO5,
 110         .mwdma_mask     = ATA_MWDMA2,
 111         .udma_mask      = ATA_UDMA6,
 112 };
 113
 114 /**
 115  *      jmicron_init_one        -       pci layer discovery entry
 116  *      @dev: PCI device
 117  *      @id: ident table entry
 118  *
 119  *      Called by the PCI code when it finds a Jmicron controller.
 120  *      We then use the IDE PCI generic helper to do most of the work.
 121  */
 122
 123 static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 124 {
 125         return ide_pci_init_one(dev, &jmicron_chipset, NULL);
 126 }
 127
 128 /* All JMB PATA controllers have and will continue to have the same
 129  * interface.  Matching vendor and device class is enough for all
 130  * current and future controllers if the controller is programmed
 131  * properly.
 132  *
 133  * If libata is configured, jmicron PCI quirk programs the controller
 134  * into the correct mode.  If libata isn't configured, match known
 135  * device IDs too to maintain backward compatibility.
 136  */
 137 static struct pci_device_id jmicron_pci_tbl[] = {
 138 #if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
 139         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
 140         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
 141         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
 142         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
 143         { PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
 144 #endif
 145         { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
 146           PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
 147         { 0, },
 148 };
 149
 150 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 151
 152 static struct pci_driver jmicron_pci_driver = {
 153         .name           = "JMicron IDE",
 154         .id_table       = jmicron_pci_tbl,
 155         .probe          = jmicron_init_one,
 156         .remove         = ide_pci_remove,
 157         .suspend        = ide_pci_suspend,
 158         .resume         = ide_pci_resume,
 159 };
 160
 161 static int __init jmicron_ide_init(void)
 162 {
 163         return ide_pci_register_driver(&jmicron_pci_driver);
 164 }
 165
 166 static void __exit jmicron_ide_exit(void)
 167 {
 168         pci_unregister_driver(&jmicron_pci_driver);
 169 }
 170
 171 module_init(jmicron_ide_init);
 172 module_exit(jmicron_ide_exit);
 173
 174 MODULE_AUTHOR("Alan Cox");
 175 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
 176 MODULE_LICENSE("GPL");