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Linux/drivers/ata/pata_isapnp.c

  1 
  2 /*
  3  *   pata-isapnp.c - ISA PnP PATA controller driver.
  4  *   Copyright 2005/2006 Red Hat Inc, all rights reserved.
  5  *
  6  *   Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
  7  */
  8 
  9 #include <linux/kernel.h>
 10 #include <linux/module.h>
 11 #include <linux/isapnp.h>
 12 #include <linux/init.h>
 13 #include <linux/blkdev.h>
 14 #include <linux/delay.h>
 15 #include <scsi/scsi_host.h>
 16 #include <linux/ata.h>
 17 #include <linux/libata.h>
 18 
 19 #define DRV_NAME "pata_isapnp"
 20 #define DRV_VERSION "0.2.5"
 21 
 22 static struct scsi_host_template isapnp_sht = {
 23         ATA_PIO_SHT(DRV_NAME),
 24 };
 25 
 26 static struct ata_port_operations isapnp_port_ops = {
 27         .inherits       = &ata_sff_port_ops,
 28         .cable_detect   = ata_cable_40wire,
 29 };
 30 
 31 static struct ata_port_operations isapnp_noalt_port_ops = {
 32         .inherits       = &ata_sff_port_ops,
 33         .cable_detect   = ata_cable_40wire,
 34         /* No altstatus so we don't want to use the lost interrupt poll */
 35         .lost_interrupt = ATA_OP_NULL,
 36 };
 37 
 38 /**
 39  *      isapnp_init_one         -       attach an isapnp interface
 40  *      @idev: PnP device
 41  *      @dev_id: matching detect line
 42  *
 43  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
 44  *      non shared IRQ.
 45  */
 46 
 47 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
 48 {
 49         struct ata_host *host;
 50         struct ata_port *ap;
 51         void __iomem *cmd_addr, *ctl_addr;
 52         int irq = 0;
 53         irq_handler_t handler = NULL;
 54 
 55         if (pnp_port_valid(idev, 0) == 0)
 56                 return -ENODEV;
 57 
 58         if (pnp_irq_valid(idev, 0)) {
 59                 irq = pnp_irq(idev, 0);
 60                 handler = ata_sff_interrupt;
 61         }
 62 
 63         /* allocate host */
 64         host = ata_host_alloc(&idev->dev, 1);
 65         if (!host)
 66                 return -ENOMEM;
 67 
 68         /* acquire resources and fill host */
 69         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
 70         if (!cmd_addr)
 71                 return -ENOMEM;
 72 
 73         ap = host->ports[0];
 74 
 75         ap->ops = &isapnp_noalt_port_ops;
 76         ap->pio_mask = ATA_PIO0;
 77         ap->flags |= ATA_FLAG_SLAVE_POSS;
 78 
 79         ap->ioaddr.cmd_addr = cmd_addr;
 80 
 81         if (pnp_port_valid(idev, 1)) {
 82                 ctl_addr = devm_ioport_map(&idev->dev,
 83                                            pnp_port_start(idev, 1), 1);
 84                 ap->ioaddr.altstatus_addr = ctl_addr;
 85                 ap->ioaddr.ctl_addr = ctl_addr;
 86                 ap->ops = &isapnp_port_ops;
 87         }
 88 
 89         ata_sff_std_ports(&ap->ioaddr);
 90 
 91         ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
 92                       (unsigned long long)pnp_port_start(idev, 0),
 93                       (unsigned long long)pnp_port_start(idev, 1));
 94 
 95         /* activate */
 96         return ata_host_activate(host, irq, handler, 0,
 97                                  &isapnp_sht);
 98 }
 99 
100 /**
101  *      isapnp_remove_one       -       unplug an isapnp interface
102  *      @idev: PnP device
103  *
104  *      Remove a previously configured PnP ATA port. Called only on module
105  *      unload events as the core does not currently deal with ISAPnP docking.
106  */
107 
108 static void isapnp_remove_one(struct pnp_dev *idev)
109 {
110         struct device *dev = &idev->dev;
111         struct ata_host *host = dev_get_drvdata(dev);
112 
113         ata_host_detach(host);
114 }
115 
116 static struct pnp_device_id isapnp_devices[] = {
117         /* Generic ESDI/IDE/ATA compatible hard disk controller */
118         {.id = "PNP0600", .driver_data = 0},
119         {.id = ""}
120 };
121 
122 MODULE_DEVICE_TABLE(pnp, isapnp_devices);
123 
124 static struct pnp_driver isapnp_driver = {
125         .name           = DRV_NAME,
126         .id_table       = isapnp_devices,
127         .probe          = isapnp_init_one,
128         .remove         = isapnp_remove_one,
129 };
130 
131 static int __init isapnp_init(void)
132 {
133         return pnp_register_driver(&isapnp_driver);
134 }
135 
136 static void __exit isapnp_exit(void)
137 {
138         pnp_unregister_driver(&isapnp_driver);
139 }
140 
141 MODULE_AUTHOR("Alan Cox");
142 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
143 MODULE_LICENSE("GPL");
144 MODULE_VERSION(DRV_VERSION);
145 
146 module_init(isapnp_init);
147 module_exit(isapnp_exit);
148 

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