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  *      jmicron_ratemask        -       Compute available modes
  26  *      @drive: IDE drive
  27  *
  28  *      Compute the available speeds for the devices on the interface. This
  29  *      is all modes to ATA133 clipped by drive cable setup.
  30  */
  31
  32 static u8 jmicron_ratemask(ide_drive_t *drive)
  33 {
  34         u8 mode = 4;
  35         if (!eighty_ninty_three(drive))
  36                 mode = min(mode, (u8)1);
  37         return mode;
  38 }
  39
  40 /**
  41  *      ata66_jmicron           -       Cable check
  42  *      @hwif: IDE port
  43  *
  44  *      Return 1 if the cable is 80pin
  45  */
  46
  47 static int __devinit ata66_jmicron(ide_hwif_t *hwif)
  48 {
  49         struct pci_dev *pdev = hwif->pci_dev;
  50
  51         u32 control;
  52         u32 control5;
  53
  54         int port = hwif->channel;
  55         port_type port_map[2];
  56
  57         pci_read_config_dword(pdev, 0x40, &control);
  58
  59         /* There are two basic mappings. One has the two SATA ports merged
  60            as master/slave and the secondary as PATA, the other has only the
  61            SATA port mapped */
  62         if (control & (1 << 23)) {
  63                 port_map[0] = PORT_SATA;
  64                 port_map[1] = PORT_PATA0;
  65         } else {
  66                 port_map[0] = PORT_SATA;
  67                 port_map[1] = PORT_SATA;
  68         }
  69
  70         /* The 365/366 may have this bit set to map the second PATA port
  71            as the internal primary channel */
  72         pci_read_config_dword(pdev, 0x80, &control5);
  73         if (control5 & (1<<24))
  74                 port_map[0] = PORT_PATA1;
  75
  76         /* The two ports may then be logically swapped by the firmware */
  77         if (control & (1 << 22))
  78                 port = port ^ 1;
  79
  80         /*
  81          *      Now we know which physical port we are talking about we can
  82          *      actually do our cable checking etc. Thankfully we don't need
  83          *      to do the plumbing for other cases.
  84          */
  85         switch (port_map[port])
  86         {
  87         case PORT_PATA0:
  88                 if (control & (1 << 3)) /* 40/80 pin primary */
  89                         return 0;
  90                 return 1;
  91         case PORT_PATA1:
  92                 if (control5 & (1 << 19))       /* 40/80 pin secondary */
  93                         return 0;
  94                 return 1;
  95         case PORT_SATA:
  96                 break;
  97         }
  98         return 1; /* Avoid bogus "control reaches end of non-void function" */
  99 }
 100
 101 static void jmicron_tuneproc (ide_drive_t *drive, byte mode_wanted)
 102 {
 103         return;
 104 }
 105
 106 /**
 107  *      config_jmicron_chipset_for_pio  -       set drive timings
 108  *      @drive: drive to tune
 109  *      @speed we want
 110  *
 111  */
 112
 113 static void config_jmicron_chipset_for_pio (ide_drive_t *drive, byte set_speed)
 114 {
 115         u8 speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
 116         if (set_speed)
 117                 (void) ide_config_drive_speed(drive, speed);
 118 }
 119
 120 /**
 121  *      jmicron_tune_chipset    -       set controller timings
 122  *      @drive: Drive to set up
 123  *      @xferspeed: speed we want to achieve
 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. We do need to honour
 127  *      the cable detect here.
 128  */
 129
 130 static int jmicron_tune_chipset (ide_drive_t *drive, byte xferspeed)
 131 {
 132
 133         u8 speed                = ide_rate_filter(jmicron_ratemask(drive), xferspeed);
 134
 135         return ide_config_drive_speed(drive, speed);
 136 }
 137
 138 /**
 139  *      config_chipset_for_dma  -       configure for DMA
 140  *      @drive: drive to configure
 141  *
 142  *      As the JMicron snoops for timings all we actually need to do is
 143  *      make sure we don't set an invalid mode.
 144  */
 145
 146 static int config_chipset_for_dma (ide_drive_t *drive)
 147 {
 148         u8 speed        = ide_dma_speed(drive, jmicron_ratemask(drive));
 149
 150         config_jmicron_chipset_for_pio(drive, !speed);
 151         jmicron_tune_chipset(drive, speed);
 152         return ide_dma_enable(drive);
 153 }
 154
 155 /**
 156  *      jmicron_configure_drive_for_dma -       set up for DMA transfers
 157  *      @drive: drive we are going to set up
 158  *
 159  *      As the JMicron snoops for timings all we actually need to do is
 160  *      make sure we don't set an invalid mode.
 161  */
 162
 163 static int jmicron_config_drive_for_dma (ide_drive_t *drive)
 164 {
 165         ide_hwif_t *hwif        = drive->hwif;
 166
 167         if (ide_use_dma(drive)) {
 168                 if (config_chipset_for_dma(drive))
 169                         return hwif->ide_dma_on(drive);
 170         }
 171         config_jmicron_chipset_for_pio(drive, 1);
 172         return hwif->ide_dma_off_quietly(drive);
 173 }
 174
 175 /**
 176  *      init_hwif_jmicron       -       set up hwif structs
 177  *      @hwif: interface to set up
 178  *
 179  *      Minimal set up is required for the Jmicron hardware.
 180  */
 181
 182 static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 183 {
 184         hwif->speedproc = &jmicron_tune_chipset;
 185         hwif->tuneproc  = &jmicron_tuneproc;
 186
 187         hwif->drives[0].autotune = 1;
 188         hwif->drives[1].autotune = 1;
 189
 190         if (!hwif->dma_base)
 191                 goto fallback;
 192
 193         hwif->atapi_dma = 1;
 194         hwif->ultra_mask = 0x7f;
 195         hwif->mwdma_mask = 0x07;
 196
 197         hwif->ide_dma_check = &jmicron_config_drive_for_dma;
 198         if (!(hwif->udma_four))
 199                 hwif->udma_four = ata66_jmicron(hwif);
 200
 201         hwif->autodma = 1;
 202         hwif->drives[0].autodma = hwif->autodma;
 203         hwif->drives[1].autodma = hwif->autodma;
 204         return;
 205 fallback:
 206         hwif->autodma = 0;
 207         return;
 208 }
 209
 210 #define DECLARE_JMB_DEV(name_str)                       \
 211         {                                               \
 212                 .name           = name_str,             \
 213                 .init_hwif      = init_hwif_jmicron,    \
 214                 .channels       = 2,                    \
 215                 .autodma        = AUTODMA,              \
 216                 .bootable       = ON_BOARD,             \
 217                 .enablebits     = { {0x40, 1, 1}, {0x40, 0x10, 0x10} }, \
 218         }
 219
 220 static ide_pci_device_t jmicron_chipsets[] __devinitdata = {
 221         /* 0 */ DECLARE_JMB_DEV("JMB361"),
 222         /* 1 */ DECLARE_JMB_DEV("JMB363"),
 223         /* 2 */ DECLARE_JMB_DEV("JMB365"),
 224         /* 3 */ DECLARE_JMB_DEV("JMB366"),
 225         /* 4 */ DECLARE_JMB_DEV("JMB368"),
 226 };
 227
 228 /**
 229  *      jmicron_init_one        -       pci layer discovery entry
 230  *      @dev: PCI device
 231  *      @id: ident table entry
 232  *
 233  *      Called by the PCI code when it finds a Jmicron controller.
 234  *      We then use the IDE PCI generic helper to do most of the work.
 235  */
 236
 237 static int __devinit jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 238 {
 239         ide_setup_pci_device(dev, &jmicron_chipsets[id->driver_data]);
 240         return 0;
 241 }
 242
 243 /* If libata is configured, jmicron PCI quirk will configure it such
 244  * that the SATA ports are in AHCI function while the PATA ports are
 245  * in a separate IDE function.  In such cases, match device class and
 246  * attach only to IDE.  If libata isn't configured, keep the old
 247  * behavior for backward compatibility.
 248  */
 249 #if defined(CONFIG_ATA) || defined(CONFIG_ATA_MODULE)
 250 #define JMB_CLASS       PCI_CLASS_STORAGE_IDE << 8
 251 #define JMB_CLASS_MASK  0xffff00
 252 #else
 253 #define JMB_CLASS       0
 254 #define JMB_CLASS_MASK  0
 255 #endif
 256
 257 static struct pci_device_id jmicron_pci_tbl[] = {
 258         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB361,
 259           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 0},
 260         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB363,
 261           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 1},
 262         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB365,
 263           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 2},
 264         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB366,
 265           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 3},
 266         { PCI_VENDOR_ID_JMICRON, PCI_DEVICE_ID_JMICRON_JMB368,
 267           PCI_ANY_ID, PCI_ANY_ID, JMB_CLASS, JMB_CLASS_MASK, 4},
 268         { 0, },
 269 };
 270
 271 MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
 272
 273 static struct pci_driver driver = {
 274         .name           = "JMicron IDE",
 275         .id_table       = jmicron_pci_tbl,
 276         .probe          = jmicron_init_one,
 277 };
 278
 279 static int __init jmicron_ide_init(void)
 280 {
 281         return ide_pci_register_driver(&driver);
 282 }
 283
 284 module_init(jmicron_ide_init);
 285
 286 MODULE_AUTHOR("Alan Cox");
 287 MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
 288 MODULE_LICENSE("GPL");