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