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) == 0) { 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