drivers/ide/delkin_cb.c

   1 /*
   2  *  Created 20 Oct 2004 by Mark Lord
   3  *
   4  *  Basic support for Delkin/ASKA/Workbit Cardbus CompactFlash adapter
   5  *
   6  *  Modeled after the 16-bit PCMCIA driver: ide-cs.c
   7  *
   8  *  This is slightly peculiar, in that it is a PCI driver,
   9  *  but is NOT an IDE PCI driver -- the IDE layer does not directly
  10  *  support hot insertion/removal of PCI interfaces, so this driver
  11  *  is unable to use the IDE PCI interfaces.  Instead, it uses the
  12  *  same interfaces as the ide-cs (PCMCIA) driver uses.
  13  *  On the plus side, the driver is also smaller/simpler this way.
  14  *
  15  *  This file is subject to the terms and conditions of the GNU General Public
  16  *  License.  See the file COPYING in the main directory of this archive for
  17  *  more details.
  18  */
  19
  20 #include <linux/types.h>
  21 #include <linux/module.h>
  22 #include <linux/ide.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25
  26 #include <asm/io.h>
  27
  28 /*
  29  * No chip documentation has yet been found,
  30  * so these configuration values were pulled from
  31  * a running Win98 system using "debug".
  32  * This gives around 3MByte/second read performance,
  33  * which is about 2/3 of what the chip is capable of.
  34  *
  35  * There is also a 4KByte mmio region on the card,
  36  * but its purpose has yet to be reverse-engineered.
  37  */
  38 static const u8 setup[] = {
  39         0x00, 0x05, 0xbe, 0x01, 0x20, 0x8f, 0x00, 0x00,
  40         0xa4, 0x1f, 0xb3, 0x1b, 0x00, 0x00, 0x00, 0x80,
  41         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  42         0x00, 0x00, 0x00, 0x00, 0xa4, 0x83, 0x02, 0x13,
  43 };
  44
  45 static const struct ide_port_ops delkin_cb_port_ops = {
  46         .quirkproc              = ide_undecoded_slave,
  47 };
  48
  49 static int delkin_cb_init_chipset(struct pci_dev *dev)
  50 {
  51         unsigned long base = pci_resource_start(dev, 0);
  52         int i;
  53
  54         outb(0x02, base + 0x1e);        /* set nIEN to block interrupts */
  55         inb(base + 0x17);               /* read status to clear interrupts */
  56
  57         for (i = 0; i < sizeof(setup); ++i) {
  58                 if (setup[i])
  59                         outb(setup[i], base + i);
  60         }
  61
  62         return 0;
  63 }
  64
  65 static const struct ide_port_info delkin_cb_port_info = {
  66         .port_ops               = &delkin_cb_port_ops,
  67         .host_flags             = IDE_HFLAG_IO_32BIT | IDE_HFLAG_UNMASK_IRQS |
  68                                   IDE_HFLAG_NO_DMA,
  69         .irq_flags              = IRQF_SHARED,
  70         .init_chipset           = delkin_cb_init_chipset,
  71 };
  72
  73 static int __devinit
  74 delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
  75 {
  76         struct ide_host *host;
  77         unsigned long base;
  78         int rc;
  79         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
  80
  81         rc = pci_enable_device(dev);
  82         if (rc) {
  83                 printk(KERN_ERR "delkin_cb: pci_enable_device failed (%d)\n", rc);
  84                 return rc;
  85         }
  86         rc = pci_request_regions(dev, "delkin_cb");
  87         if (rc) {
  88                 printk(KERN_ERR "delkin_cb: pci_request_regions failed (%d)\n", rc);
  89                 pci_disable_device(dev);
  90                 return rc;
  91         }
  92         base = pci_resource_start(dev, 0);
  93
  94         delkin_cb_init_chipset(dev);
  95
  96         memset(&hw, 0, sizeof(hw));
  97         ide_std_init_ports(&hw, base + 0x10, base + 0x1e);
  98         hw.irq = dev->irq;
  99         hw.dev = &dev->dev;
 100         hw.chipset = ide_pci;           /* this enables IRQ sharing */
 101
 102         rc = ide_host_add(&delkin_cb_port_info, hws, &host);
 103         if (rc)
 104                 goto out_disable;
 105
 106         pci_set_drvdata(dev, host);
 107
 108         return 0;
 109
 110 out_disable:
 111         pci_release_regions(dev);
 112         pci_disable_device(dev);
 113         return rc;
 114 }
 115
 116 static void
 117 delkin_cb_remove (struct pci_dev *dev)
 118 {
 119         struct ide_host *host = pci_get_drvdata(dev);
 120
 121         ide_host_remove(host);
 122
 123         pci_release_regions(dev);
 124         pci_disable_device(dev);
 125 }
 126
 127 #ifdef CONFIG_PM
 128 static int delkin_cb_suspend(struct pci_dev *dev, pm_message_t state)
 129 {
 130         pci_save_state(dev);
 131         pci_disable_device(dev);
 132         pci_set_power_state(dev, pci_choose_state(dev, state));
 133
 134         return 0;
 135 }
 136
 137 static int delkin_cb_resume(struct pci_dev *dev)
 138 {
 139         struct ide_host *host = pci_get_drvdata(dev);
 140         int rc;
 141
 142         pci_set_power_state(dev, PCI_D0);
 143
 144         rc = pci_enable_device(dev);
 145         if (rc)
 146                 return rc;
 147
 148         pci_restore_state(dev);
 149         pci_set_master(dev);
 150
 151         if (host->init_chipset)
 152                 host->init_chipset(dev);
 153
 154         return 0;
 155 }
 156 #else
 157 #define delkin_cb_suspend NULL
 158 #define delkin_cb_resume NULL
 159 #endif
 160
 161 static struct pci_device_id delkin_cb_pci_tbl[] __devinitdata = {
 162         { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 163         { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 164         { 0, },
 165 };
 166 MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);
 167
 168 static struct pci_driver delkin_cb_pci_driver = {
 169         .name           = "Delkin-ASKA-Workbit Cardbus IDE",
 170         .id_table       = delkin_cb_pci_tbl,
 171         .probe          = delkin_cb_probe,
 172         .remove         = delkin_cb_remove,
 173         .suspend        = delkin_cb_suspend,
 174         .resume         = delkin_cb_resume,
 175 };
 176
 177 static int __init delkin_cb_init(void)
 178 {
 179         return pci_register_driver(&delkin_cb_pci_driver);
 180 }
 181
 182 static void __exit delkin_cb_exit(void)
 183 {
 184         pci_unregister_driver(&delkin_cb_pci_driver);
 185 }
 186
 187 module_init(delkin_cb_init);
 188 module_exit(delkin_cb_exit);
 189
 190 MODULE_AUTHOR("Mark Lord");
 191 MODULE_DESCRIPTION("Basic support for Delkin/ASKA/Workbit Cardbus IDE");
 192 MODULE_LICENSE("GPL");
 193