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[mv-sheeva.git] / drivers / ata / pata_isapnp.c
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         int irq = 0;
79         irq_handler_t handler = NULL;
80
81         if (pnp_port_valid(idev, 0) == 0)
82                 return -ENODEV;
83
84         if (pnp_irq_valid(idev, 0)) {
85                 irq = pnp_irq(idev, 0);
86                 handler = ata_interrupt;
87         }
88
89         /* allocate host */
90         host = ata_host_alloc(&idev->dev, 1);
91         if (!host)
92                 return -ENOMEM;
93
94         /* acquire resources and fill host */
95         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
96         if (!cmd_addr)
97                 return -ENOMEM;
98
99         ap = host->ports[0];
100
101         ap->ops = &isapnp_port_ops;
102         ap->pio_mask = 1;
103         ap->flags |= ATA_FLAG_SLAVE_POSS;
104
105         ap->ioaddr.cmd_addr = cmd_addr;
106
107         if (pnp_port_valid(idev, 1) == 0) {
108                 ctl_addr = devm_ioport_map(&idev->dev,
109                                            pnp_port_start(idev, 1), 1);
110                 ap->ioaddr.altstatus_addr = ctl_addr;
111                 ap->ioaddr.ctl_addr = ctl_addr;
112         }
113
114         ata_std_ports(&ap->ioaddr);
115
116         ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
117                       (unsigned long long)pnp_port_start(idev, 0),
118                       (unsigned long long)pnp_port_start(idev, 1));
119
120         /* activate */
121         return ata_host_activate(host, irq, handler, 0,
122                                  &isapnp_sht);
123 }
124
125 /**
126  *      isapnp_remove_one       -       unplug an isapnp interface
127  *      @idev: PnP device
128  *
129  *      Remove a previously configured PnP ATA port. Called only on module
130  *      unload events as the core does not currently deal with ISAPnP docking.
131  */
132
133 static void isapnp_remove_one(struct pnp_dev *idev)
134 {
135         struct device *dev = &idev->dev;
136         struct ata_host *host = dev_get_drvdata(dev);
137
138         ata_host_detach(host);
139 }
140
141 static struct pnp_device_id isapnp_devices[] = {
142         /* Generic ESDI/IDE/ATA compatible hard disk controller */
143         {.id = "PNP0600", .driver_data = 0},
144         {.id = ""}
145 };
146
147 MODULE_DEVICE_TABLE(pnp, isapnp_devices);
148
149 static struct pnp_driver isapnp_driver = {
150         .name           = DRV_NAME,
151         .id_table       = isapnp_devices,
152         .probe          = isapnp_init_one,
153         .remove         = isapnp_remove_one,
154 };
155
156 static int __init isapnp_init(void)
157 {
158         return pnp_register_driver(&isapnp_driver);
159 }
160
161 static void __exit isapnp_exit(void)
162 {
163         pnp_unregister_driver(&isapnp_driver);
164 }
165
166 MODULE_AUTHOR("Alan Cox");
167 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
168 MODULE_LICENSE("GPL");
169 MODULE_VERSION(DRV_VERSION);
170
171 module_init(isapnp_init);
172 module_exit(isapnp_exit);