1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun /*
4*4882a593Smuzhiyun * pata-isapnp.c - ISA PnP PATA controller driver.
5*4882a593Smuzhiyun * Copyright 2005/2006 Red Hat Inc, all rights reserved.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/isapnp.h>
13*4882a593Smuzhiyun #include <linux/init.h>
14*4882a593Smuzhiyun #include <linux/blkdev.h>
15*4882a593Smuzhiyun #include <linux/delay.h>
16*4882a593Smuzhiyun #include <scsi/scsi_host.h>
17*4882a593Smuzhiyun #include <linux/ata.h>
18*4882a593Smuzhiyun #include <linux/libata.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define DRV_NAME "pata_isapnp"
21*4882a593Smuzhiyun #define DRV_VERSION "0.2.5"
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static struct scsi_host_template isapnp_sht = {
24*4882a593Smuzhiyun ATA_PIO_SHT(DRV_NAME),
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun static struct ata_port_operations isapnp_port_ops = {
28*4882a593Smuzhiyun .inherits = &ata_sff_port_ops,
29*4882a593Smuzhiyun .cable_detect = ata_cable_40wire,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun static struct ata_port_operations isapnp_noalt_port_ops = {
33*4882a593Smuzhiyun .inherits = &ata_sff_port_ops,
34*4882a593Smuzhiyun .cable_detect = ata_cable_40wire,
35*4882a593Smuzhiyun /* No altstatus so we don't want to use the lost interrupt poll */
36*4882a593Smuzhiyun .lost_interrupt = ATA_OP_NULL,
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun /**
40*4882a593Smuzhiyun * isapnp_init_one - attach an isapnp interface
41*4882a593Smuzhiyun * @idev: PnP device
42*4882a593Smuzhiyun * @dev_id: matching detect line
43*4882a593Smuzhiyun *
44*4882a593Smuzhiyun * Register an ISA bus IDE interface. Such interfaces are PIO 0 and
45*4882a593Smuzhiyun * non shared IRQ.
46*4882a593Smuzhiyun */
47*4882a593Smuzhiyun
isapnp_init_one(struct pnp_dev * idev,const struct pnp_device_id * dev_id)48*4882a593Smuzhiyun static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun struct ata_host *host;
51*4882a593Smuzhiyun struct ata_port *ap;
52*4882a593Smuzhiyun void __iomem *cmd_addr, *ctl_addr;
53*4882a593Smuzhiyun int irq = 0;
54*4882a593Smuzhiyun irq_handler_t handler = NULL;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun if (pnp_port_valid(idev, 0) == 0)
57*4882a593Smuzhiyun return -ENODEV;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun if (pnp_irq_valid(idev, 0)) {
60*4882a593Smuzhiyun irq = pnp_irq(idev, 0);
61*4882a593Smuzhiyun handler = ata_sff_interrupt;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun /* allocate host */
65*4882a593Smuzhiyun host = ata_host_alloc(&idev->dev, 1);
66*4882a593Smuzhiyun if (!host)
67*4882a593Smuzhiyun return -ENOMEM;
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun /* acquire resources and fill host */
70*4882a593Smuzhiyun cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
71*4882a593Smuzhiyun if (!cmd_addr)
72*4882a593Smuzhiyun return -ENOMEM;
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun ap = host->ports[0];
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun ap->ops = &isapnp_noalt_port_ops;
77*4882a593Smuzhiyun ap->pio_mask = ATA_PIO0;
78*4882a593Smuzhiyun ap->flags |= ATA_FLAG_SLAVE_POSS;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun ap->ioaddr.cmd_addr = cmd_addr;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun if (pnp_port_valid(idev, 1)) {
83*4882a593Smuzhiyun ctl_addr = devm_ioport_map(&idev->dev,
84*4882a593Smuzhiyun pnp_port_start(idev, 1), 1);
85*4882a593Smuzhiyun ap->ioaddr.altstatus_addr = ctl_addr;
86*4882a593Smuzhiyun ap->ioaddr.ctl_addr = ctl_addr;
87*4882a593Smuzhiyun ap->ops = &isapnp_port_ops;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun ata_sff_std_ports(&ap->ioaddr);
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
93*4882a593Smuzhiyun (unsigned long long)pnp_port_start(idev, 0),
94*4882a593Smuzhiyun (unsigned long long)pnp_port_start(idev, 1));
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun /* activate */
97*4882a593Smuzhiyun return ata_host_activate(host, irq, handler, 0,
98*4882a593Smuzhiyun &isapnp_sht);
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun /**
102*4882a593Smuzhiyun * isapnp_remove_one - unplug an isapnp interface
103*4882a593Smuzhiyun * @idev: PnP device
104*4882a593Smuzhiyun *
105*4882a593Smuzhiyun * Remove a previously configured PnP ATA port. Called only on module
106*4882a593Smuzhiyun * unload events as the core does not currently deal with ISAPnP docking.
107*4882a593Smuzhiyun */
108*4882a593Smuzhiyun
isapnp_remove_one(struct pnp_dev * idev)109*4882a593Smuzhiyun static void isapnp_remove_one(struct pnp_dev *idev)
110*4882a593Smuzhiyun {
111*4882a593Smuzhiyun struct device *dev = &idev->dev;
112*4882a593Smuzhiyun struct ata_host *host = dev_get_drvdata(dev);
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun ata_host_detach(host);
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun static struct pnp_device_id isapnp_devices[] = {
118*4882a593Smuzhiyun /* Generic ESDI/IDE/ATA compatible hard disk controller */
119*4882a593Smuzhiyun {.id = "PNP0600", .driver_data = 0},
120*4882a593Smuzhiyun {.id = ""}
121*4882a593Smuzhiyun };
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun MODULE_DEVICE_TABLE(pnp, isapnp_devices);
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun static struct pnp_driver isapnp_driver = {
126*4882a593Smuzhiyun .name = DRV_NAME,
127*4882a593Smuzhiyun .id_table = isapnp_devices,
128*4882a593Smuzhiyun .probe = isapnp_init_one,
129*4882a593Smuzhiyun .remove = isapnp_remove_one,
130*4882a593Smuzhiyun };
131*4882a593Smuzhiyun
132*4882a593Smuzhiyun module_pnp_driver(isapnp_driver);
133*4882a593Smuzhiyun MODULE_AUTHOR("Alan Cox");
134*4882a593Smuzhiyun MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
135*4882a593Smuzhiyun MODULE_LICENSE("GPL");
136*4882a593Smuzhiyun MODULE_VERSION(DRV_VERSION);
137