blob: 3f6ebc6c665a4f2f6189ec1852b642fb31e040a2 [file] [log] [blame]
Paul Mundta20c9e82006-10-27 19:08:48 -07001/*
2 * Generic platform device PATA driver
3 *
Paul Mundtf7fc0ce2007-11-08 11:15:21 +09004 * Copyright (C) 2006 - 2007 Paul Mundt
Paul Mundta20c9e82006-10-27 19:08:48 -07005 *
6 * Based on pata_pcmcia:
7 *
Alan Coxab771632008-10-27 15:09:10 +00008 * Copyright 2005-2006 Red Hat Inc, all rights reserved.
Paul Mundta20c9e82006-10-27 19:08:48 -07009 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
12 * for more details.
13 */
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/blkdev.h>
18#include <scsi/scsi_host.h>
19#include <linux/ata.h>
20#include <linux/libata.h>
21#include <linux/platform_device.h>
Jeff Garzik0a87e3e2008-02-01 18:02:30 -050022#include <linux/ata_platform.h>
Paul Mundta20c9e82006-10-27 19:08:48 -070023
24#define DRV_NAME "pata_platform"
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090025#define DRV_VERSION "1.2"
Paul Mundta20c9e82006-10-27 19:08:48 -070026
27static int pio_mask = 1;
28
29/*
30 * Provide our own set_mode() as we don't want to change anything that has
31 * already been configured..
32 */
Tejun Heo02607312007-08-06 18:36:23 +090033static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
Paul Mundta20c9e82006-10-27 19:08:48 -070034{
Tejun Heof58229f2007-08-06 18:36:23 +090035 struct ata_device *dev;
Paul Mundta20c9e82006-10-27 19:08:48 -070036
Tejun Heo1eca4362008-11-03 20:03:17 +090037 ata_for_each_dev(dev, link, ENABLED) {
38 /* We don't really care */
39 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
40 dev->xfer_shift = ATA_SHIFT_PIO;
41 dev->flags |= ATA_DFLAG_PIO;
42 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
Paul Mundta20c9e82006-10-27 19:08:48 -070043 }
Al Viro161c8882007-01-30 13:23:45 +000044 return 0;
Paul Mundta20c9e82006-10-27 19:08:48 -070045}
46
Paul Mundta20c9e82006-10-27 19:08:48 -070047static struct scsi_host_template pata_platform_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +090048 ATA_PIO_SHT(DRV_NAME),
Paul Mundta20c9e82006-10-27 19:08:48 -070049};
50
51static struct ata_port_operations pata_platform_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +090052 .inherits = &ata_sff_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +090053 .sff_data_xfer = ata_sff_data_xfer_noirq,
Tejun Heo029cfd62008-03-25 12:22:49 +090054 .cable_detect = ata_cable_unknown,
55 .set_mode = pata_platform_set_mode,
56 .port_start = ATA_OP_NULL,
Paul Mundta20c9e82006-10-27 19:08:48 -070057};
58
59static void pata_platform_setup_port(struct ata_ioports *ioaddr,
Anton Vorontsovcf036132008-01-09 22:10:22 +030060 unsigned int shift)
Paul Mundta20c9e82006-10-27 19:08:48 -070061{
Paul Mundta20c9e82006-10-27 19:08:48 -070062 /* Fixup the port shift for platforms that need it */
Paul Mundta20c9e82006-10-27 19:08:48 -070063 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
64 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
65 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
66 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
67 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
68 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
69 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
70 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
71 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
72 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
73}
74
75/**
Anton Vorontsovcf036132008-01-09 22:10:22 +030076 * __pata_platform_probe - attach a platform interface
77 * @dev: device
78 * @io_res: Resource representing I/O base
79 * @ctl_res: Resource representing CTL base
80 * @irq_res: Resource representing IRQ and its flags
81 * @ioport_shift: I/O port shift
82 * @__pio_mask: PIO mask
Paul Mundta20c9e82006-10-27 19:08:48 -070083 *
84 * Register a platform bus IDE interface. Such interfaces are PIO and we
85 * assume do not support IRQ sharing.
86 *
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090087 * Platform devices are expected to contain at least 2 resources per port:
Paul Mundta20c9e82006-10-27 19:08:48 -070088 *
89 * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
90 * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090091 *
92 * and optionally:
93 *
Paul Mundta20c9e82006-10-27 19:08:48 -070094 * - IRQ (IORESOURCE_IRQ)
95 *
96 * If the base resources are both mem types, the ioremap() is handled
97 * here. For IORESOURCE_IO, it's assumed that there's no remapping
98 * necessary.
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090099 *
100 * If no IRQ resource is present, PIO polling mode is used instead.
Paul Mundta20c9e82006-10-27 19:08:48 -0700101 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300102int __devinit __pata_platform_probe(struct device *dev,
103 struct resource *io_res,
104 struct resource *ctl_res,
105 struct resource *irq_res,
106 unsigned int ioport_shift,
107 int __pio_mask)
Paul Mundta20c9e82006-10-27 19:08:48 -0700108{
Tejun Heo5d728822007-04-17 23:44:08 +0900109 struct ata_host *host;
110 struct ata_port *ap;
Paul Mundta20c9e82006-10-27 19:08:48 -0700111 unsigned int mmio;
Anton Vorontsovcf036132008-01-09 22:10:22 +0300112 int irq = 0;
113 int irq_flags = 0;
114
115 /*
116 * Check for MMIO
117 */
118 mmio = (( io_res->flags == IORESOURCE_MEM) &&
119 (ctl_res->flags == IORESOURCE_MEM));
120
121 /*
122 * And the IRQ
123 */
124 if (irq_res && irq_res->start > 0) {
125 irq = irq_res->start;
126 irq_flags = irq_res->flags;
127 }
128
129 /*
130 * Now that that's out of the way, wire up the port..
131 */
132 host = ata_host_alloc(dev, 1);
133 if (!host)
134 return -ENOMEM;
135 ap = host->ports[0];
136
137 ap->ops = &pata_platform_port_ops;
138 ap->pio_mask = __pio_mask;
139 ap->flags |= ATA_FLAG_SLAVE_POSS;
140
141 /*
142 * Use polling mode if there's no IRQ
143 */
144 if (!irq) {
145 ap->flags |= ATA_FLAG_PIO_POLLING;
146 ata_port_desc(ap, "no IRQ, using PIO polling");
147 }
148
149 /*
150 * Handle the MMIO case
151 */
152 if (mmio) {
153 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700154 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300155 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700156 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300157 } else {
158 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700159 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300160 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700161 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300162 }
163 if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
164 dev_err(dev, "failed to map IO/CTL base\n");
165 return -ENOMEM;
166 }
167
168 ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
169
170 pata_platform_setup_port(&ap->ioaddr, ioport_shift);
171
172 ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
173 (unsigned long long)io_res->start,
174 (unsigned long long)ctl_res->start);
175
176 /* activate */
Tejun Heo9363c382008-04-07 22:47:16 +0900177 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
Anton Vorontsovcf036132008-01-09 22:10:22 +0300178 irq_flags, &pata_platform_sht);
179}
180EXPORT_SYMBOL_GPL(__pata_platform_probe);
181
182/**
183 * __pata_platform_remove - unplug a platform interface
184 * @dev: device
185 *
186 * A platform bus ATA device has been unplugged. Perform the needed
187 * cleanup. Also called on module unload for any active devices.
188 */
Sonic Zhang78a7ba42009-01-08 00:37:12 +0800189int __pata_platform_remove(struct device *dev)
Anton Vorontsovcf036132008-01-09 22:10:22 +0300190{
191 struct ata_host *host = dev_get_drvdata(dev);
192
193 ata_host_detach(host);
194
195 return 0;
196}
197EXPORT_SYMBOL_GPL(__pata_platform_remove);
198
199static int __devinit pata_platform_probe(struct platform_device *pdev)
200{
201 struct resource *io_res;
202 struct resource *ctl_res;
203 struct resource *irq_res;
204 struct pata_platform_info *pp_info = pdev->dev.platform_data;
Paul Mundta20c9e82006-10-27 19:08:48 -0700205
206 /*
207 * Simple resource validation ..
208 */
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900209 if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
Paul Mundta20c9e82006-10-27 19:08:48 -0700210 dev_err(&pdev->dev, "invalid number of resources\n");
211 return -EINVAL;
212 }
213
214 /*
215 * Get the I/O base first
216 */
217 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
218 if (io_res == NULL) {
219 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
220 if (unlikely(io_res == NULL))
221 return -EINVAL;
222 }
223
224 /*
225 * Then the CTL base
226 */
227 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
228 if (ctl_res == NULL) {
229 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
230 if (unlikely(ctl_res == NULL))
231 return -EINVAL;
232 }
233
234 /*
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900235 * And the IRQ
236 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300237 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
238 if (irq_res)
239 irq_res->flags = pp_info ? pp_info->irq_flags : 0;
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900240
Anton Vorontsovcf036132008-01-09 22:10:22 +0300241 return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
242 pp_info ? pp_info->ioport_shift : 0,
243 pio_mask);
Paul Mundta20c9e82006-10-27 19:08:48 -0700244}
245
Paul Mundta20c9e82006-10-27 19:08:48 -0700246static int __devexit pata_platform_remove(struct platform_device *pdev)
247{
Anton Vorontsovcf036132008-01-09 22:10:22 +0300248 return __pata_platform_remove(&pdev->dev);
Paul Mundta20c9e82006-10-27 19:08:48 -0700249}
250
251static struct platform_driver pata_platform_driver = {
252 .probe = pata_platform_probe,
253 .remove = __devexit_p(pata_platform_remove),
254 .driver = {
255 .name = DRV_NAME,
256 .owner = THIS_MODULE,
257 },
258};
259
260static int __init pata_platform_init(void)
261{
262 return platform_driver_register(&pata_platform_driver);
263}
264
265static void __exit pata_platform_exit(void)
266{
267 platform_driver_unregister(&pata_platform_driver);
268}
269module_init(pata_platform_init);
270module_exit(pata_platform_exit);
271
272module_param(pio_mask, int, 0);
273
274MODULE_AUTHOR("Paul Mundt");
275MODULE_DESCRIPTION("low-level driver for platform device ATA");
276MODULE_LICENSE("GPL");
277MODULE_VERSION(DRV_VERSION);
Kay Sievers458622f2008-04-18 13:41:57 -0700278MODULE_ALIAS("platform:" DRV_NAME);