1 2 /* 3 * pata-isapnp.c - ISA PnP PATA controller driver. 4 * Copyright 2005/2006 Red Hat Inc <alan@redhat.com>, 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 "0.2.2" 21 22 static struct scsi_host_template isapnp_sht = { 23 .module = THIS_MODULE, 24 .name = DRV_NAME, 25 .ioctl = ata_scsi_ioctl, 26 .queuecommand = ata_scsi_queuecmd, 27 .can_queue = ATA_DEF_QUEUE, 28 .this_id = ATA_SHT_THIS_ID, 29 .sg_tablesize = LIBATA_MAX_PRD, 30 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, 31 .emulated = ATA_SHT_EMULATED, 32 .use_clustering = ATA_SHT_USE_CLUSTERING, 33 .proc_name = DRV_NAME, 34 .dma_boundary = ATA_DMA_BOUNDARY, 35 .slave_configure = ata_scsi_slave_config, 36 .slave_destroy = ata_scsi_slave_destroy, 37 .bios_param = ata_std_bios_param, 38 }; 39 40 static struct ata_port_operations isapnp_port_ops = { 41 .tf_load = ata_tf_load, 42 .tf_read = ata_tf_read, 43 .check_status = ata_check_status, 44 .exec_command = ata_exec_command, 45 .dev_select = ata_std_dev_select, 46 47 .freeze = ata_bmdma_freeze, 48 .thaw = ata_bmdma_thaw, 49 .error_handler = ata_bmdma_error_handler, 50 .post_internal_cmd = ata_bmdma_post_internal_cmd, 51 .cable_detect = ata_cable_40wire, 52 53 .qc_prep = ata_qc_prep, 54 .qc_issue = ata_qc_issue_prot, 55 56 .data_xfer = ata_data_xfer, 57 58 .irq_clear = ata_bmdma_irq_clear, 59 .irq_on = ata_irq_on, 60 61 .port_start = ata_sff_port_start, 62 }; 63 64 /** 65 * isapnp_init_one - attach an isapnp interface 66 * @idev: PnP device 67 * @dev_id: matching detect line 68 * 69 * Register an ISA bus IDE interface. Such interfaces are PIO 0 and 70 * non shared IRQ. 71 */ 72 73 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id) 74 { 75 struct ata_host *host; 76 struct ata_port *ap; 77 void __iomem *cmd_addr, *ctl_addr; 78 79 if (pnp_port_valid(idev, 0) == 0) 80 return -ENODEV; 81 82 /* FIXME: Should selected polled PIO here not fail */ 83 if (pnp_irq_valid(idev, 0) == 0) 84 return -ENODEV; 85 86 /* allocate host */ 87 host = ata_host_alloc(&idev->dev, 1); 88 if (!host) 89 return -ENOMEM; 90 91 /* acquire resources and fill host */ 92 cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8); 93 if (!cmd_addr) 94 return -ENOMEM; 95 96 ap = host->ports[0]; 97 98 ap->ops = &isapnp_port_ops; 99 ap->pio_mask = 1; 100 ap->flags |= ATA_FLAG_SLAVE_POSS; 101 102 ap->ioaddr.cmd_addr = cmd_addr; 103 104 if (pnp_port_valid(idev, 1) == 0) { 105 ctl_addr = devm_ioport_map(&idev->dev, 106 pnp_port_start(idev, 1), 1); 107 ap->ioaddr.altstatus_addr = ctl_addr; 108 ap->ioaddr.ctl_addr = ctl_addr; 109 } 110 111 ata_std_ports(&ap->ioaddr); 112 113 ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", 114 (unsigned long long)pnp_port_start(idev, 0), 115 (unsigned long long)pnp_port_start(idev, 1)); 116 117 /* activate */ 118 return ata_host_activate(host, pnp_irq(idev, 0), ata_interrupt, 0, 119 &isapnp_sht); 120 } 121 122 /** 123 * isapnp_remove_one - unplug an isapnp interface 124 * @idev: PnP device 125 * 126 * Remove a previously configured PnP ATA port. Called only on module 127 * unload events as the core does not currently deal with ISAPnP docking. 128 */ 129 130 static void isapnp_remove_one(struct pnp_dev *idev) 131 { 132 struct device *dev = &idev->dev; 133 struct ata_host *host = dev_get_drvdata(dev); 134 135 ata_host_detach(host); 136 } 137 138 static struct pnp_device_id isapnp_devices[] = { 139 /* Generic ESDI/IDE/ATA compatible hard disk controller */ 140 {.id = "PNP0600", .driver_data = 0}, 141 {.id = ""} 142 }; 143 144 MODULE_DEVICE_TABLE(pnp, isapnp_devices); 145 146 static struct pnp_driver isapnp_driver = { 147 .name = DRV_NAME, 148 .id_table = isapnp_devices, 149 .probe = isapnp_init_one, 150 .remove = isapnp_remove_one, 151 }; 152 153 static int __init isapnp_init(void) 154 { 155 return pnp_register_driver(&isapnp_driver); 156 } 157 158 static void __exit isapnp_exit(void) 159 { 160 pnp_unregister_driver(&isapnp_driver); 161 } 162 163 MODULE_AUTHOR("Alan Cox"); 164 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); 165 MODULE_LICENSE("GPL"); 166 MODULE_VERSION(DRV_VERSION); 167 168 module_init(isapnp_init); 169 module_exit(isapnp_exit); 170