LXR linux/drivers/ide/delkin

   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 */
  38static 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
  45static const struct ide_port_ops delkin_cb_port_ops = {
  46        .quirkproc              = ide_undecoded_slave,
  47};
  48
  49static 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
  65static 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        .chipset                = ide_pci,
  72};
  73
  74static int 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        struct ide_hw hw, *hws[] = { &hw };
  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
 101        rc = ide_host_add(&delkin_cb_port_info, hws, 1, &host);
 102        if (rc)
 103                goto out_disable;
 104
 105        pci_set_drvdata(dev, host);
 106
 107        return 0;
 108
 109out_disable:
 110        pci_release_regions(dev);
 111        pci_disable_device(dev);
 112        return rc;
 113}
 114
 115static void
 116delkin_cb_remove (struct pci_dev *dev)
 117{
 118        struct ide_host *host = pci_get_drvdata(dev);
 119
 120        ide_host_remove(host);
 121
 122        pci_release_regions(dev);
 123        pci_disable_device(dev);
 124}
 125
 126#ifdef CONFIG_PM
 127static int delkin_cb_suspend(struct pci_dev *dev, pm_message_t state)
 128{
 129        pci_save_state(dev);
 130        pci_disable_device(dev);
 131        pci_set_power_state(dev, pci_choose_state(dev, state));
 132
 133        return 0;
 134}
 135
 136static int delkin_cb_resume(struct pci_dev *dev)
 137{
 138        struct ide_host *host = pci_get_drvdata(dev);
 139        int rc;
 140
 141        pci_set_power_state(dev, PCI_D0);
 142
 143        rc = pci_enable_device(dev);
 144        if (rc)
 145                return rc;
 146
 147        pci_restore_state(dev);
 148        pci_set_master(dev);
 149
 150        if (host->init_chipset)
 151                host->init_chipset(dev);
 152
 153        return 0;
 154}
 155#else
 156#define delkin_cb_suspend NULL
 157#define delkin_cb_resume NULL
 158#endif
 159
 160static struct pci_device_id delkin_cb_pci_tbl[] = {
 161        { 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 162        { 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 163        { 0, },
 164};
 165MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);
 166
 167static struct pci_driver delkin_cb_pci_driver = {
 168        .name           = "Delkin-ASKA-Workbit Cardbus IDE",
 169        .id_table       = delkin_cb_pci_tbl,
 170        .probe          = delkin_cb_probe,
 171        .remove         = delkin_cb_remove,
 172        .suspend        = delkin_cb_suspend,
 173        .resume         = delkin_cb_resume,
 174};
 175
 176module_pci_driver(delkin_cb_pci_driver);
 177
 178MODULE_AUTHOR("Mark Lord");
 179MODULE_DESCRIPTION("Basic support for Delkin/ASKA/Workbit Cardbus IDE");
 180MODULE_LICENSE("GPL");
 181
 182