1 // SPDX-License-Identifier: GPL-2.0-only 2 3 /* 4 * pata-isapnp.c - ISA PnP PATA controller driver. 5 * Copyright 2005/2006 Red Hat Inc, all rights reserved. 6 * 7 * Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/isapnp.h> 13 #include <linux/init.h> 14 #include <linux/blkdev.h> 15 #include <linux/delay.h> 16 #include <scsi/scsi_host.h> 17 #include <linux/ata.h> 18 #include <linux/libata.h> 19 20 #define DRV_NAME "pata_isapnp" 21 #define DRV_VERSION "0.2.5" 22 23 static const struct scsi_host_template isapnp_sht = { 24 ATA_PIO_SHT(DRV_NAME), 25 }; 26 27 static struct ata_port_operations isapnp_port_ops = { 28 .inherits = &ata_sff_port_ops, 29 .cable_detect = ata_cable_40wire, 30 }; 31 32 static struct ata_port_operations isapnp_noalt_port_ops = { 33 .inherits = &ata_sff_port_ops, 34 .cable_detect = ata_cable_40wire, 35 /* No altstatus so we don't want to use the lost interrupt poll */ 36 .lost_interrupt = ATA_OP_NULL, 37 }; 38 39 /** 40 * isapnp_init_one - attach an isapnp interface 41 * @idev: PnP device 42 * @dev_id: matching detect line 43 * 44 * Register an ISA bus IDE interface. Such interfaces are PIO 0 and 45 * non shared IRQ. 46 */ 47 48 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id) 49 { 50 struct ata_host *host; 51 struct ata_port *ap; 52 void __iomem *cmd_addr, *ctl_addr; 53 int irq = 0; 54 irq_handler_t handler = NULL; 55 56 if (pnp_port_valid(idev, 0) == 0) 57 return -ENODEV; 58 59 if (pnp_irq_valid(idev, 0)) { 60 irq = pnp_irq(idev, 0); 61 handler = ata_sff_interrupt; 62 } 63 64 /* allocate host */ 65 host = ata_host_alloc(&idev->dev, 1); 66 if (!host) 67 return -ENOMEM; 68 69 /* acquire resources and fill host */ 70 cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8); 71 if (!cmd_addr) 72 return -ENOMEM; 73 74 ap = host->ports[0]; 75 76 ap->ops = &isapnp_noalt_port_ops; 77 ap->pio_mask = ATA_PIO0; 78 ap->flags |= ATA_FLAG_SLAVE_POSS; 79 80 ap->ioaddr.cmd_addr = cmd_addr; 81 82 if (pnp_port_valid(idev, 1)) { 83 ctl_addr = devm_ioport_map(&idev->dev, 84 pnp_port_start(idev, 1), 1); 85 if (!ctl_addr) 86 return -ENOMEM; 87 88 ap->ioaddr.altstatus_addr = ctl_addr; 89 ap->ioaddr.ctl_addr = ctl_addr; 90 ap->ops = &isapnp_port_ops; 91 } 92 93 ata_sff_std_ports(&ap->ioaddr); 94 95 ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", 96 (unsigned long long)pnp_port_start(idev, 0), 97 (unsigned long long)pnp_port_start(idev, 1)); 98 99 /* activate */ 100 return ata_host_activate(host, irq, handler, 0, 101 &isapnp_sht); 102 } 103 104 /** 105 * isapnp_remove_one - unplug an isapnp interface 106 * @idev: PnP device 107 * 108 * Remove a previously configured PnP ATA port. Called only on module 109 * unload events as the core does not currently deal with ISAPnP docking. 110 */ 111 112 static void isapnp_remove_one(struct pnp_dev *idev) 113 { 114 struct device *dev = &idev->dev; 115 struct ata_host *host = dev_get_drvdata(dev); 116 117 ata_host_detach(host); 118 } 119 120 static struct pnp_device_id isapnp_devices[] = { 121 /* Generic ESDI/IDE/ATA compatible hard disk controller */ 122 {.id = "PNP0600", .driver_data = 0}, 123 {.id = ""} 124 }; 125 126 MODULE_DEVICE_TABLE(pnp, isapnp_devices); 127 128 static struct pnp_driver isapnp_driver = { 129 .name = DRV_NAME, 130 .id_table = isapnp_devices, 131 .probe = isapnp_init_one, 132 .remove = isapnp_remove_one, 133 }; 134 135 module_pnp_driver(isapnp_driver); 136 MODULE_AUTHOR("Alan Cox"); 137 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); 138 MODULE_LICENSE("GPL"); 139 MODULE_VERSION(DRV_VERSION); 140