blob: 77e4e3b17f5479b7ee4a2306513f4e8aa5d3a18f [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 Heo02607312007-08-06 18:36:23 +090037 ata_link_for_each_dev(dev, link) {
Paul Mundta20c9e82006-10-27 19:08:48 -070038 if (ata_dev_enabled(dev)) {
39 /* We don't really care */
40 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
41 dev->xfer_shift = ATA_SHIFT_PIO;
42 dev->flags |= ATA_DFLAG_PIO;
Alane852f702007-02-20 17:35:43 +000043 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
Paul Mundta20c9e82006-10-27 19:08:48 -070044 }
45 }
Al Viro161c8882007-01-30 13:23:45 +000046 return 0;
Paul Mundta20c9e82006-10-27 19:08:48 -070047}
48
Paul Mundta20c9e82006-10-27 19:08:48 -070049static struct scsi_host_template pata_platform_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +090050 ATA_PIO_SHT(DRV_NAME),
Paul Mundta20c9e82006-10-27 19:08:48 -070051};
52
53static struct ata_port_operations pata_platform_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +090054 .inherits = &ata_sff_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +090055 .sff_data_xfer = ata_sff_data_xfer_noirq,
Tejun Heo029cfd62008-03-25 12:22:49 +090056 .cable_detect = ata_cable_unknown,
57 .set_mode = pata_platform_set_mode,
58 .port_start = ATA_OP_NULL,
Paul Mundta20c9e82006-10-27 19:08:48 -070059};
60
61static void pata_platform_setup_port(struct ata_ioports *ioaddr,
Anton Vorontsovcf036132008-01-09 22:10:22 +030062 unsigned int shift)
Paul Mundta20c9e82006-10-27 19:08:48 -070063{
Paul Mundta20c9e82006-10-27 19:08:48 -070064 /* Fixup the port shift for platforms that need it */
Paul Mundta20c9e82006-10-27 19:08:48 -070065 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
66 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
67 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
68 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
69 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
70 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
71 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
72 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
73 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
74 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
75}
76
77/**
Anton Vorontsovcf036132008-01-09 22:10:22 +030078 * __pata_platform_probe - attach a platform interface
79 * @dev: device
80 * @io_res: Resource representing I/O base
81 * @ctl_res: Resource representing CTL base
82 * @irq_res: Resource representing IRQ and its flags
83 * @ioport_shift: I/O port shift
84 * @__pio_mask: PIO mask
Paul Mundta20c9e82006-10-27 19:08:48 -070085 *
86 * Register a platform bus IDE interface. Such interfaces are PIO and we
87 * assume do not support IRQ sharing.
88 *
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090089 * Platform devices are expected to contain at least 2 resources per port:
Paul Mundta20c9e82006-10-27 19:08:48 -070090 *
91 * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
92 * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090093 *
94 * and optionally:
95 *
Paul Mundta20c9e82006-10-27 19:08:48 -070096 * - IRQ (IORESOURCE_IRQ)
97 *
98 * If the base resources are both mem types, the ioremap() is handled
99 * here. For IORESOURCE_IO, it's assumed that there's no remapping
100 * necessary.
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900101 *
102 * If no IRQ resource is present, PIO polling mode is used instead.
Paul Mundta20c9e82006-10-27 19:08:48 -0700103 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300104int __devinit __pata_platform_probe(struct device *dev,
105 struct resource *io_res,
106 struct resource *ctl_res,
107 struct resource *irq_res,
108 unsigned int ioport_shift,
109 int __pio_mask)
Paul Mundta20c9e82006-10-27 19:08:48 -0700110{
Tejun Heo5d728822007-04-17 23:44:08 +0900111 struct ata_host *host;
112 struct ata_port *ap;
Paul Mundta20c9e82006-10-27 19:08:48 -0700113 unsigned int mmio;
Anton Vorontsovcf036132008-01-09 22:10:22 +0300114 int irq = 0;
115 int irq_flags = 0;
116
117 /*
118 * Check for MMIO
119 */
120 mmio = (( io_res->flags == IORESOURCE_MEM) &&
121 (ctl_res->flags == IORESOURCE_MEM));
122
123 /*
124 * And the IRQ
125 */
126 if (irq_res && irq_res->start > 0) {
127 irq = irq_res->start;
128 irq_flags = irq_res->flags;
129 }
130
131 /*
132 * Now that that's out of the way, wire up the port..
133 */
134 host = ata_host_alloc(dev, 1);
135 if (!host)
136 return -ENOMEM;
137 ap = host->ports[0];
138
139 ap->ops = &pata_platform_port_ops;
140 ap->pio_mask = __pio_mask;
141 ap->flags |= ATA_FLAG_SLAVE_POSS;
142
143 /*
144 * Use polling mode if there's no IRQ
145 */
146 if (!irq) {
147 ap->flags |= ATA_FLAG_PIO_POLLING;
148 ata_port_desc(ap, "no IRQ, using PIO polling");
149 }
150
151 /*
152 * Handle the MMIO case
153 */
154 if (mmio) {
155 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
156 io_res->end - io_res->start + 1);
157 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
158 ctl_res->end - ctl_res->start + 1);
159 } else {
160 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
161 io_res->end - io_res->start + 1);
162 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
163 ctl_res->end - ctl_res->start + 1);
164 }
165 if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
166 dev_err(dev, "failed to map IO/CTL base\n");
167 return -ENOMEM;
168 }
169
170 ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
171
172 pata_platform_setup_port(&ap->ioaddr, ioport_shift);
173
174 ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
175 (unsigned long long)io_res->start,
176 (unsigned long long)ctl_res->start);
177
178 /* activate */
Tejun Heo9363c382008-04-07 22:47:16 +0900179 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
Anton Vorontsovcf036132008-01-09 22:10:22 +0300180 irq_flags, &pata_platform_sht);
181}
182EXPORT_SYMBOL_GPL(__pata_platform_probe);
183
184/**
185 * __pata_platform_remove - unplug a platform interface
186 * @dev: device
187 *
188 * A platform bus ATA device has been unplugged. Perform the needed
189 * cleanup. Also called on module unload for any active devices.
190 */
191int __devexit __pata_platform_remove(struct device *dev)
192{
193 struct ata_host *host = dev_get_drvdata(dev);
194
195 ata_host_detach(host);
196
197 return 0;
198}
199EXPORT_SYMBOL_GPL(__pata_platform_remove);
200
201static int __devinit pata_platform_probe(struct platform_device *pdev)
202{
203 struct resource *io_res;
204 struct resource *ctl_res;
205 struct resource *irq_res;
206 struct pata_platform_info *pp_info = pdev->dev.platform_data;
Paul Mundta20c9e82006-10-27 19:08:48 -0700207
208 /*
209 * Simple resource validation ..
210 */
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900211 if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
Paul Mundta20c9e82006-10-27 19:08:48 -0700212 dev_err(&pdev->dev, "invalid number of resources\n");
213 return -EINVAL;
214 }
215
216 /*
217 * Get the I/O base first
218 */
219 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
220 if (io_res == NULL) {
221 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
222 if (unlikely(io_res == NULL))
223 return -EINVAL;
224 }
225
226 /*
227 * Then the CTL base
228 */
229 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
230 if (ctl_res == NULL) {
231 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
232 if (unlikely(ctl_res == NULL))
233 return -EINVAL;
234 }
235
236 /*
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900237 * And the IRQ
238 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300239 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
240 if (irq_res)
241 irq_res->flags = pp_info ? pp_info->irq_flags : 0;
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900242
Anton Vorontsovcf036132008-01-09 22:10:22 +0300243 return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
244 pp_info ? pp_info->ioport_shift : 0,
245 pio_mask);
Paul Mundta20c9e82006-10-27 19:08:48 -0700246}
247
Paul Mundta20c9e82006-10-27 19:08:48 -0700248static int __devexit pata_platform_remove(struct platform_device *pdev)
249{
Anton Vorontsovcf036132008-01-09 22:10:22 +0300250 return __pata_platform_remove(&pdev->dev);
Paul Mundta20c9e82006-10-27 19:08:48 -0700251}
252
253static struct platform_driver pata_platform_driver = {
254 .probe = pata_platform_probe,
255 .remove = __devexit_p(pata_platform_remove),
256 .driver = {
257 .name = DRV_NAME,
258 .owner = THIS_MODULE,
259 },
260};
261
262static int __init pata_platform_init(void)
263{
264 return platform_driver_register(&pata_platform_driver);
265}
266
267static void __exit pata_platform_exit(void)
268{
269 platform_driver_unregister(&pata_platform_driver);
270}
271module_init(pata_platform_init);
272module_exit(pata_platform_exit);
273
274module_param(pio_mask, int, 0);
275
276MODULE_AUTHOR("Paul Mundt");
277MODULE_DESCRIPTION("low-level driver for platform device ATA");
278MODULE_LICENSE("GPL");
279MODULE_VERSION(DRV_VERSION);
Kay Sievers458622f2008-04-18 13:41:57 -0700280MODULE_ALIAS("platform:" DRV_NAME);