release/src-rt-6.x/linux/linux-2.6/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  *      Return 1 if the cable is 80pin
  29  */
  30
  31 static int __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 0;
  74                 return 1;
  75         case PORT_PATA1:
  76                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
  77                         return 0;
  78                 return 1;
  79         case PORT_SATA:
  80                 break;
  81         }
  82         return 1; /* Avoid bogus "control reaches end of non-void function" */
  83 }
  84
  85 static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)
  86 {
  87         return;
  88 }
  89
  90 /**
  91  *      config_jmicron_chipset_for_pio  -       set drive timings
  92  *      @drive: drive to tune
  93  *      @speed we want
  94  *
  95  */
  96
  97 static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)
  98 {
  99         u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
 100         if (set_speed)
 101                 (void) ide_config_drive_speed(drive, speed);
 102 }
 103
 104 /**
 105  *      jmicron_tune_chipset    -       set controller timings
 106  *      @drive: Drive to set up
 107  *      @xferspeed: speed we want to achieve
 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. We do need to honour
 111  *      the cable detect here.
 112  */
 113
 114 static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
 115 {
 116         u8 speed = ide_rate_filter(drive, xferspeed);
 117
 118         return ide_config_drive_speed(drive, speed);
 119 }
 120
 121 /**
 122  *      jmicron_configure_drive_for_dma -       set up for DMA transfers
 123  *      @drive: drive we are going to set up
 124  *
 125  *      As the JMicron snoops for timings all we actually need to do is
 126  *      make sure we don't set an invalid mode.
 127  */
 128
 129 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
 130 {
 131         if (ide_tune_dma(drive))
 132                 return 0;
 133
 134         config_jmicron_chipset_for_pio(drive, 1);
 135
 136         return -1;
 137 }
 138
 139 /**
 140  *      init_hwif_jmicron       -       set up hwif structs
 141  *      @hwif: interface to set up
 142  *
 143  *      Minimal set up is required for the Jmicron hardware.
 144  */
 145
 146 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 147 {
 148         hwif->speedproc = &jmicron_tune_chipset;
 149         hwif->tuneproc  = &jmicron_tuneproc;
 150
 151         hwif->drives[0].autotune = 1;
 152         hwif->drives[1].autotune = 1;
 153
 154         if (!hwif->dma_base)
 155                 goto fallback;
 156
 157         hwif->atapi_dma = 1;
 158         hwif->ultra_mask = 0x7f;
 159         hwif->mwdma_mask = 0x07;
 160
 161         hwif->ide_dma_check = &jmicron_config_drive_for_dma;
 162         if (!(hwif->udma_four))
 163                 hwif->udma_four = ata66_jmicron(hwif);
 164
 165         hwif->autodma = 1;
 166         hwif->drives[0].autodma = hwif->autodma;
 167         hwif->drives[1].autodma = hwif->autodma;
 168         return;
 169 fallback:
 170         hwif->autodma = 0;
 171         return;
 172 }
 173
 174 #define DECLARE_JMB_DEV(name_str)                       \
 175         {                                               \
 176                 .name           = name_str,             \
 177                 .init_hwif      = init_hwif_jmicron,    \
 178                 .channels       = 2,                    \
 179                 .autodma        = AUTODMA,              \
 180                 .bootable       = ON_BOARD,             \
 181                 .enablebits     = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \
 182         }
 183
 184 static ide_pci_device_t jmicron_chipsets[] __devinitdata = {
 185         /* 0 */ DECLARE_JMB_DEV("JMB361"),
 186         /* 1 */ DECLARE_JMB_DEV("JMB363"),
 187         /* 2 */ DECLARE_JMB_DEV("JMB365"),
 188         /* 3 */ DECLARE_JMB_DEV("JMB366"),
 189         /* 4 */ DECLARE_JMB_DEV("JMB368"),
 190 };
 191
 192 /**
 193  *      jmicron_init_one        -       pci layer discovery entry
 194  *      @dev: PCI device
 195  *      @id: ident table entry
 196  *
 197  *      Called by the PCI code when it finds a Jmicron controller.
 198  *      We then use the IDE PCI generic helper to do most of the work.
 199  */
 200
 201 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 202 {
 203         ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]);
 204         return 0;
 205 }
 206
 207 /* If libata is configured, jmicron PCI quirk will configure it such
 208  * that the SATA ports are in AHCI function while the PATA ports are
 209  * in a separate IDE function.  In such cases, match device class and
 210  * attach only to IDE.  If libata isn't configured, keep the old
 211  * behavior for backward compatibility.
 212  */
 213 #if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
 214 #define JMB_CLASS       PCI_CLASS_STORAGE_IDE << 8
 215 #define JMB_CLASS_MASK  0xffff00
 216 #else
 217 #define JMB_CLASS       0
 218 #define JMB_CLASS_MASK  0
 219 #endif
 220
 221 static struct pci_device_id jmicron_pci_tbl[] = {
 222         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361,
 223           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 0},
 224         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363,
 225           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 1},
 226         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365,
 227           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 2},
 228         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366,
 229           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 3},
 230         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368,
 231           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 4},
 232         { 0, },
 233 };
 234
 235 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 236
 237 static struct pci_driver driver = {
 238         .name           = "JMicron IDE",
 239         .id_table       = jmicron_pci_tbl,
 240         .probe          = jmicron_init_one,
 241 };
 242
 243 static int __init jmicron_ide_init(void)
 244 {
 245         return ide_pci_register_driver(&driver);
 246 }
 247
 248 module_init(jmicron_ide_init);
 249
 250 MODULE_AUTHOR("Alan Cox");
 251 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
 252 MODULE_LICENSE("GPL");