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669a5db4 JG |
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 | ||
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, | |
669a5db4 JG |
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, | |
afdfe899 | 36 | .slave_destroy = ata_scsi_slave_destroy, |
669a5db4 JG |
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, | |
bda30288 | 55 | |
669a5db4 JG |
56 | .data_xfer = ata_pio_data_xfer, |
57 | ||
58 | .irq_handler = ata_interrupt, | |
59 | .irq_clear = ata_bmdma_irq_clear, | |
60 | ||
61 | .port_start = ata_port_start, | |
669a5db4 JG |
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_probe_ent ae; | |
76 | ||
77 | if (pnp_port_valid(idev, 0) == 0) | |
78 | return -ENODEV; | |
79 | ||
80 | /* FIXME: Should selected polled PIO here not fail */ | |
81 | if (pnp_irq_valid(idev, 0) == 0) | |
82 | return -ENODEV; | |
83 | ||
84 | memset(&ae, 0, sizeof(struct ata_probe_ent)); | |
85 | INIT_LIST_HEAD(&ae.node); | |
86 | ae.dev = &idev->dev; | |
87 | ae.port_ops = &isapnp_port_ops; | |
88 | ae.sht = &isapnp_sht; | |
89 | ae.n_ports = 1; | |
90 | ae.pio_mask = 1; /* ISA so PIO 0 cycles */ | |
91 | ae.irq = pnp_irq(idev, 0); | |
92 | ae.irq_flags = 0; | |
93 | ae.port_flags = ATA_FLAG_SLAVE_POSS; | |
94 | ae.port[0].cmd_addr = pnp_port_start(idev, 0); | |
95 | ||
96 | if (pnp_port_valid(idev, 1) == 0) { | |
97 | ae.port[0].altstatus_addr = pnp_port_start(idev, 1); | |
98 | ae.port[0].ctl_addr = pnp_port_start(idev, 1); | |
99 | ae.port_flags |= ATA_FLAG_SRST; | |
100 | } | |
101 | ata_std_ports(&ae.port[0]); | |
102 | ||
103 | if (ata_device_add(&ae) == 0) | |
104 | return -ENODEV; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | /** | |
109 | * isapnp_remove_one - unplug an isapnp interface | |
110 | * @idev: PnP device | |
111 | * | |
112 | * Remove a previously configured PnP ATA port. Called only on module | |
113 | * unload events as the core does not currently deal with ISAPnP docking. | |
114 | */ | |
115 | ||
116 | static void isapnp_remove_one(struct pnp_dev *idev) | |
117 | { | |
118 | struct device *dev = &idev->dev; | |
119 | struct ata_host *host = dev_get_drvdata(dev); | |
120 | ||
24dc5f33 | 121 | ata_host_detach(host); |
669a5db4 JG |
122 | dev_set_drvdata(dev, NULL); |
123 | } | |
124 | ||
125 | static struct pnp_device_id isapnp_devices[] = { | |
126 | /* Generic ESDI/IDE/ATA compatible hard disk controller */ | |
127 | {.id = "PNP0600", .driver_data = 0}, | |
128 | {.id = ""} | |
129 | }; | |
130 | ||
131 | static struct pnp_driver isapnp_driver = { | |
132 | .name = DRV_NAME, | |
133 | .id_table = isapnp_devices, | |
134 | .probe = isapnp_init_one, | |
135 | .remove = isapnp_remove_one, | |
136 | }; | |
137 | ||
138 | static int __init isapnp_init(void) | |
139 | { | |
140 | return pnp_register_driver(&isapnp_driver); | |
141 | } | |
142 | ||
143 | static void __exit isapnp_exit(void) | |
144 | { | |
145 | pnp_unregister_driver(&isapnp_driver); | |
146 | } | |
147 | ||
148 | MODULE_AUTHOR("Alan Cox"); | |
149 | MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); | |
150 | MODULE_LICENSE("GPL"); | |
151 | MODULE_VERSION(DRV_VERSION); | |
152 | ||
153 | module_init(isapnp_init); | |
154 | module_exit(isapnp_exit); |