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