pata_isapnp.c revision 0d5ff566779f894ca9937231a181eb31e4adff0e
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 "0.1.5" 21 22static 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 40static 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 61 .port_start = ata_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 73static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id) 74{ 75 struct ata_probe_ent ae; 76 void __iomem *cmd_addr, *ctl_addr; 77 78 if (pnp_port_valid(idev, 0) == 0) 79 return -ENODEV; 80 81 /* FIXME: Should selected polled PIO here not fail */ 82 if (pnp_irq_valid(idev, 0) == 0) 83 return -ENODEV; 84 85 cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8); 86 if (!cmd_addr) 87 return -ENOMEM; 88 89 memset(&ae, 0, sizeof(struct ata_probe_ent)); 90 INIT_LIST_HEAD(&ae.node); 91 ae.dev = &idev->dev; 92 ae.port_ops = &isapnp_port_ops; 93 ae.sht = &isapnp_sht; 94 ae.n_ports = 1; 95 ae.pio_mask = 1; /* ISA so PIO 0 cycles */ 96 ae.irq = pnp_irq(idev, 0); 97 ae.irq_flags = 0; 98 ae.port_flags = ATA_FLAG_SLAVE_POSS; 99 ae.port[0].cmd_addr = cmd_addr; 100 101 if (pnp_port_valid(idev, 1) == 0) { 102 ctl_addr = devm_ioport_map(&idev->dev, 103 pnp_port_start(idev, 1), 1); 104 ae.port[0].altstatus_addr = ctl_addr; 105 ae.port[0].ctl_addr = ctl_addr; 106 ae.port_flags |= ATA_FLAG_SRST; 107 } 108 ata_std_ports(&ae.port[0]); 109 110 if (ata_device_add(&ae) == 0) 111 return -ENODEV; 112 return 0; 113} 114 115/** 116 * isapnp_remove_one - unplug an isapnp interface 117 * @idev: PnP device 118 * 119 * Remove a previously configured PnP ATA port. Called only on module 120 * unload events as the core does not currently deal with ISAPnP docking. 121 */ 122 123static void isapnp_remove_one(struct pnp_dev *idev) 124{ 125 struct device *dev = &idev->dev; 126 struct ata_host *host = dev_get_drvdata(dev); 127 128 ata_host_detach(host); 129 dev_set_drvdata(dev, NULL); 130} 131 132static struct pnp_device_id isapnp_devices[] = { 133 /* Generic ESDI/IDE/ATA compatible hard disk controller */ 134 {.id = "PNP0600", .driver_data = 0}, 135 {.id = ""} 136}; 137 138static struct pnp_driver isapnp_driver = { 139 .name = DRV_NAME, 140 .id_table = isapnp_devices, 141 .probe = isapnp_init_one, 142 .remove = isapnp_remove_one, 143}; 144 145static int __init isapnp_init(void) 146{ 147 return pnp_register_driver(&isapnp_driver); 148} 149 150static void __exit isapnp_exit(void) 151{ 152 pnp_unregister_driver(&isapnp_driver); 153} 154 155MODULE_AUTHOR("Alan Cox"); 156MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); 157MODULE_LICENSE("GPL"); 158MODULE_VERSION(DRV_VERSION); 159 160module_init(isapnp_init); 161module_exit(isapnp_exit); 162