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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;
Joe Perchesa9a79df2011-04-15 15:51:59 -070042 ata_dev_info(dev, "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,
Paul Mundta20c9e82006-10-27 19:08:48 -070056};
57
58static void pata_platform_setup_port(struct ata_ioports *ioaddr,
Anton Vorontsovcf036132008-01-09 22:10:22 +030059 unsigned int shift)
Paul Mundta20c9e82006-10-27 19:08:48 -070060{
Paul Mundta20c9e82006-10-27 19:08:48 -070061 /* Fixup the port shift for platforms that need it */
Paul Mundta20c9e82006-10-27 19:08:48 -070062 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
63 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
64 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
65 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
66 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
67 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
68 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
69 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
70 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
71 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
72}
73
74/**
Anton Vorontsovcf036132008-01-09 22:10:22 +030075 * __pata_platform_probe - attach a platform interface
76 * @dev: device
77 * @io_res: Resource representing I/O base
78 * @ctl_res: Resource representing CTL base
79 * @irq_res: Resource representing IRQ and its flags
80 * @ioport_shift: I/O port shift
81 * @__pio_mask: PIO mask
Paul Mundta20c9e82006-10-27 19:08:48 -070082 *
83 * Register a platform bus IDE interface. Such interfaces are PIO and we
84 * assume do not support IRQ sharing.
85 *
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090086 * Platform devices are expected to contain at least 2 resources per port:
Paul Mundta20c9e82006-10-27 19:08:48 -070087 *
88 * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
89 * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090090 *
91 * and optionally:
92 *
Paul Mundta20c9e82006-10-27 19:08:48 -070093 * - IRQ (IORESOURCE_IRQ)
94 *
95 * If the base resources are both mem types, the ioremap() is handled
96 * here. For IORESOURCE_IO, it's assumed that there's no remapping
97 * necessary.
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090098 *
99 * If no IRQ resource is present, PIO polling mode is used instead.
Paul Mundta20c9e82006-10-27 19:08:48 -0700100 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300101int __devinit __pata_platform_probe(struct device *dev,
102 struct resource *io_res,
103 struct resource *ctl_res,
104 struct resource *irq_res,
105 unsigned int ioport_shift,
106 int __pio_mask)
Paul Mundta20c9e82006-10-27 19:08:48 -0700107{
Tejun Heo5d728822007-04-17 23:44:08 +0900108 struct ata_host *host;
109 struct ata_port *ap;
Paul Mundta20c9e82006-10-27 19:08:48 -0700110 unsigned int mmio;
Anton Vorontsovcf036132008-01-09 22:10:22 +0300111 int irq = 0;
112 int irq_flags = 0;
113
114 /*
115 * Check for MMIO
116 */
117 mmio = (( io_res->flags == IORESOURCE_MEM) &&
118 (ctl_res->flags == IORESOURCE_MEM));
119
120 /*
121 * And the IRQ
122 */
123 if (irq_res && irq_res->start > 0) {
124 irq = irq_res->start;
125 irq_flags = irq_res->flags;
126 }
127
128 /*
129 * Now that that's out of the way, wire up the port..
130 */
131 host = ata_host_alloc(dev, 1);
132 if (!host)
133 return -ENOMEM;
134 ap = host->ports[0];
135
136 ap->ops = &pata_platform_port_ops;
137 ap->pio_mask = __pio_mask;
138 ap->flags |= ATA_FLAG_SLAVE_POSS;
139
140 /*
141 * Use polling mode if there's no IRQ
142 */
143 if (!irq) {
144 ap->flags |= ATA_FLAG_PIO_POLLING;
145 ata_port_desc(ap, "no IRQ, using PIO polling");
146 }
147
148 /*
149 * Handle the MMIO case
150 */
151 if (mmio) {
152 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700153 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300154 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700155 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300156 } else {
157 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700158 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300159 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700160 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300161 }
162 if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
163 dev_err(dev, "failed to map IO/CTL base\n");
164 return -ENOMEM;
165 }
166
167 ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
168
169 pata_platform_setup_port(&ap->ioaddr, ioport_shift);
170
171 ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
172 (unsigned long long)io_res->start,
173 (unsigned long long)ctl_res->start);
174
175 /* activate */
Tejun Heo9363c382008-04-07 22:47:16 +0900176 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
Anton Vorontsovcf036132008-01-09 22:10:22 +0300177 irq_flags, &pata_platform_sht);
178}
179EXPORT_SYMBOL_GPL(__pata_platform_probe);
180
181/**
182 * __pata_platform_remove - unplug a platform interface
183 * @dev: device
184 *
185 * A platform bus ATA device has been unplugged. Perform the needed
186 * cleanup. Also called on module unload for any active devices.
187 */
Sonic Zhang78a7ba42009-01-08 00:37:12 +0800188int __pata_platform_remove(struct device *dev)
Anton Vorontsovcf036132008-01-09 22:10:22 +0300189{
190 struct ata_host *host = dev_get_drvdata(dev);
191
192 ata_host_detach(host);
193
194 return 0;
195}
196EXPORT_SYMBOL_GPL(__pata_platform_remove);
197
198static int __devinit pata_platform_probe(struct platform_device *pdev)
199{
200 struct resource *io_res;
201 struct resource *ctl_res;
202 struct resource *irq_res;
203 struct pata_platform_info *pp_info = pdev->dev.platform_data;
Paul Mundta20c9e82006-10-27 19:08:48 -0700204
205 /*
206 * Simple resource validation ..
207 */
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900208 if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
Paul Mundta20c9e82006-10-27 19:08:48 -0700209 dev_err(&pdev->dev, "invalid number of resources\n");
210 return -EINVAL;
211 }
212
213 /*
214 * Get the I/O base first
215 */
216 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
217 if (io_res == NULL) {
218 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
219 if (unlikely(io_res == NULL))
220 return -EINVAL;
221 }
222
223 /*
224 * Then the CTL base
225 */
226 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
227 if (ctl_res == NULL) {
228 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
229 if (unlikely(ctl_res == NULL))
230 return -EINVAL;
231 }
232
233 /*
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900234 * And the IRQ
235 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300236 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
237 if (irq_res)
238 irq_res->flags = pp_info ? pp_info->irq_flags : 0;
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900239
Anton Vorontsovcf036132008-01-09 22:10:22 +0300240 return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
241 pp_info ? pp_info->ioport_shift : 0,
242 pio_mask);
Paul Mundta20c9e82006-10-27 19:08:48 -0700243}
244
Paul Mundta20c9e82006-10-27 19:08:48 -0700245static int __devexit pata_platform_remove(struct platform_device *pdev)
246{
Anton Vorontsovcf036132008-01-09 22:10:22 +0300247 return __pata_platform_remove(&pdev->dev);
Paul Mundta20c9e82006-10-27 19:08:48 -0700248}
249
250static struct platform_driver pata_platform_driver = {
251 .probe = pata_platform_probe,
252 .remove = __devexit_p(pata_platform_remove),
253 .driver = {
254 .name = DRV_NAME,
255 .owner = THIS_MODULE,
256 },
257};
258
259static int __init pata_platform_init(void)
260{
261 return platform_driver_register(&pata_platform_driver);
262}
263
264static void __exit pata_platform_exit(void)
265{
266 platform_driver_unregister(&pata_platform_driver);
267}
268module_init(pata_platform_init);
269module_exit(pata_platform_exit);
270
271module_param(pio_mask, int, 0);
272
273MODULE_AUTHOR("Paul Mundt");
274MODULE_DESCRIPTION("low-level driver for platform device ATA");
275MODULE_LICENSE("GPL");
276MODULE_VERSION(DRV_VERSION);
Kay Sievers458622f2008-04-18 13:41:57 -0700277MODULE_ALIAS("platform:" DRV_NAME);