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 "0.2.0" 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 .port_disable = ata_port_disable, 42 .tf_load = ata_tf_load, 43 .tf_read = ata_tf_read, 44 .check_status = ata_check_status, 45 .exec_command = ata_exec_command, 46 .dev_select = ata_std_dev_select, 47 48 .freeze = ata_bmdma_freeze, 49 .thaw = ata_bmdma_thaw, 50 .error_handler = ata_bmdma_error_handler, 51 .post_internal_cmd = ata_bmdma_post_internal_cmd, 52 53 .qc_prep = ata_qc_prep, 54 .qc_issue = ata_qc_issue_prot, 55 56 .data_xfer = ata_data_xfer, 57 58 .irq_handler = ata_interrupt, 59 .irq_clear = ata_bmdma_irq_clear, 60 .irq_on = ata_irq_on, 61 .irq_ack = ata_irq_ack, 62 63 .port_start = ata_port_start, 64 }; 65 66 /** 67 * isapnp_init_one - attach an isapnp interface 68 * @idev: PnP device 69 * @dev_id: matching detect line 70 * 71 * Register an ISA bus IDE interface. Such interfaces are PIO 0 and 72 * non shared IRQ. 73 */ 74 75 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id) 76 { 77 struct ata_probe_ent ae; 78 void __iomem *cmd_addr, *ctl_addr; 79 80 if (pnp_port_valid(idev, 0) == 0) 81 return -ENODEV; 82 83 /* FIXME: Should selected polled PIO here not fail */ 84 if (pnp_irq_valid(idev, 0) == 0) 85 return -ENODEV; 86 87 cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8); 88 if (!cmd_addr) 89 return -ENOMEM; 90 91 memset(&ae, 0, sizeof(struct ata_probe_ent)); 92 INIT_LIST_HEAD(&ae.node); 93 ae.dev = &idev->dev; 94 ae.port_ops = &isapnp_port_ops; 95 ae.sht = &isapnp_sht; 96 ae.n_ports = 1; 97 ae.pio_mask = 1; /* ISA so PIO 0 cycles */ 98 ae.irq = pnp_irq(idev, 0); 99 ae.irq_flags = 0; 100 ae.port_flags = ATA_FLAG_SLAVE_POSS; 101 ae.port[0].cmd_addr = cmd_addr; 102 103 if (pnp_port_valid(idev, 1) == 0) { 104 ctl_addr = devm_ioport_map(&idev->dev, 105 pnp_port_start(idev, 1), 1); 106 ae.port[0].altstatus_addr = ctl_addr; 107 ae.port[0].ctl_addr = ctl_addr; 108 ae.port_flags |= ATA_FLAG_SRST; 109 } 110 ata_std_ports(&ae.port[0]); 111 112 if (ata_device_add(&ae) == 0) 113 return -ENODEV; 114 return 0; 115 } 116 117 /** 118 * isapnp_remove_one - unplug an isapnp interface 119 * @idev: PnP device 120 * 121 * Remove a previously configured PnP ATA port. Called only on module 122 * unload events as the core does not currently deal with ISAPnP docking. 123 */ 124 125 static void isapnp_remove_one(struct pnp_dev *idev) 126 { 127 struct device *dev = &idev->dev; 128 struct ata_host *host = dev_get_drvdata(dev); 129 130 ata_host_detach(host); 131 } 132 133 static struct pnp_device_id isapnp_devices[] = { 134 /* Generic ESDI/IDE/ATA compatible hard disk controller */ 135 {.id = "PNP0600", .driver_data = 0}, 136 {.id = ""} 137 }; 138 139 static struct pnp_driver isapnp_driver = { 140 .name = DRV_NAME, 141 .id_table = isapnp_devices, 142 .probe = isapnp_init_one, 143 .remove = isapnp_remove_one, 144 }; 145 146 static int __init isapnp_init(void) 147 { 148 return pnp_register_driver(&isapnp_driver); 149 } 150 151 static void __exit isapnp_exit(void) 152 { 153 pnp_unregister_driver(&isapnp_driver); 154 } 155 156 MODULE_AUTHOR("Alan Cox"); 157 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); 158 MODULE_LICENSE("GPL"); 159 MODULE_VERSION(DRV_VERSION); 160 161 module_init(isapnp_init); 162 module_exit(isapnp_exit); 163