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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>
Paul Mundta20c9e82006-10-27 19:08:48 -070016#include <linux/blkdev.h>
17#include <scsi/scsi_host.h>
18#include <linux/ata.h>
19#include <linux/libata.h>
20#include <linux/platform_device.h>
Jeff Garzik0a87e3e2008-02-01 18:02:30 -050021#include <linux/ata_platform.h>
Paul Mundta20c9e82006-10-27 19:08:48 -070022
23#define DRV_NAME "pata_platform"
Paul Mundtf7fc0ce2007-11-08 11:15:21 +090024#define DRV_VERSION "1.2"
Paul Mundta20c9e82006-10-27 19:08:48 -070025
26static int pio_mask = 1;
27
28/*
29 * Provide our own set_mode() as we don't want to change anything that has
30 * already been configured..
31 */
Tejun Heo02607312007-08-06 18:36:23 +090032static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
Paul Mundta20c9e82006-10-27 19:08:48 -070033{
Tejun Heof58229f2007-08-06 18:36:23 +090034 struct ata_device *dev;
Paul Mundta20c9e82006-10-27 19:08:48 -070035
Tejun Heo1eca4362008-11-03 20:03:17 +090036 ata_for_each_dev(dev, link, ENABLED) {
37 /* We don't really care */
38 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
39 dev->xfer_shift = ATA_SHIFT_PIO;
40 dev->flags |= ATA_DFLAG_PIO;
Joe Perchesa9a79df2011-04-15 15:51:59 -070041 ata_dev_info(dev, "configured for PIO\n");
Paul Mundta20c9e82006-10-27 19:08:48 -070042 }
Al Viro161c8882007-01-30 13:23:45 +000043 return 0;
Paul Mundta20c9e82006-10-27 19:08:48 -070044}
45
Paul Mundta20c9e82006-10-27 19:08:48 -070046static struct scsi_host_template pata_platform_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +090047 ATA_PIO_SHT(DRV_NAME),
Paul Mundta20c9e82006-10-27 19:08:48 -070048};
49
50static struct ata_port_operations pata_platform_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +090051 .inherits = &ata_sff_port_ops,
Tejun Heo5682ed32008-04-07 22:47:16 +090052 .sff_data_xfer = ata_sff_data_xfer_noirq,
Tejun Heo029cfd62008-03-25 12:22:49 +090053 .cable_detect = ata_cable_unknown,
54 .set_mode = pata_platform_set_mode,
Paul Mundta20c9e82006-10-27 19:08:48 -070055};
56
57static void pata_platform_setup_port(struct ata_ioports *ioaddr,
Anton Vorontsovcf036132008-01-09 22:10:22 +030058 unsigned int shift)
Paul Mundta20c9e82006-10-27 19:08:48 -070059{
Paul Mundta20c9e82006-10-27 19:08:48 -070060 /* Fixup the port shift for platforms that need it */
Paul Mundta20c9e82006-10-27 19:08:48 -070061 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
62 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
63 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
64 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
65 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
66 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
67 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
68 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
69 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
70 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
71}
72
73/**
Anton Vorontsovcf036132008-01-09 22:10:22 +030074 * __pata_platform_probe - attach a platform interface
75 * @dev: device
76 * @io_res: Resource representing I/O base
77 * @ctl_res: Resource representing CTL base
78 * @irq_res: Resource representing IRQ and its flags
79 * @ioport_shift: I/O port shift
80 * @__pio_mask: PIO mask
Akinobu Mita17263902015-01-29 08:30:30 +090081 * @sht: scsi_host_template to use when registering
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 */
Greg Kroah-Hartman0ec24912012-12-21 13:19:58 -0800101int __pata_platform_probe(struct device *dev, struct resource *io_res,
102 struct resource *ctl_res, struct resource *irq_res,
Akinobu Mita17263902015-01-29 08:30:30 +0900103 unsigned int ioport_shift, int __pio_mask,
104 struct scsi_host_template *sht)
Paul Mundta20c9e82006-10-27 19:08:48 -0700105{
Tejun Heo5d728822007-04-17 23:44:08 +0900106 struct ata_host *host;
107 struct ata_port *ap;
Paul Mundta20c9e82006-10-27 19:08:48 -0700108 unsigned int mmio;
Anton Vorontsovcf036132008-01-09 22:10:22 +0300109 int irq = 0;
110 int irq_flags = 0;
111
112 /*
113 * Check for MMIO
114 */
115 mmio = (( io_res->flags == IORESOURCE_MEM) &&
116 (ctl_res->flags == IORESOURCE_MEM));
117
118 /*
119 * And the IRQ
120 */
121 if (irq_res && irq_res->start > 0) {
122 irq = irq_res->start;
Alexander Shiyan53f3cc42014-08-23 14:45:47 +0400123 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
Anton Vorontsovcf036132008-01-09 22:10:22 +0300124 }
125
126 /*
127 * Now that that's out of the way, wire up the port..
128 */
129 host = ata_host_alloc(dev, 1);
130 if (!host)
131 return -ENOMEM;
132 ap = host->ports[0];
133
134 ap->ops = &pata_platform_port_ops;
135 ap->pio_mask = __pio_mask;
136 ap->flags |= ATA_FLAG_SLAVE_POSS;
137
138 /*
139 * Use polling mode if there's no IRQ
140 */
141 if (!irq) {
142 ap->flags |= ATA_FLAG_PIO_POLLING;
143 ata_port_desc(ap, "no IRQ, using PIO polling");
144 }
145
146 /*
147 * Handle the MMIO case
148 */
149 if (mmio) {
150 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700151 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300152 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700153 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300154 } else {
155 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700156 resource_size(io_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300157 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
Julia Lawall041b5ea2009-08-06 16:05:08 -0700158 resource_size(ctl_res));
Anton Vorontsovcf036132008-01-09 22:10:22 +0300159 }
160 if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
161 dev_err(dev, "failed to map IO/CTL base\n");
162 return -ENOMEM;
163 }
164
165 ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
166
167 pata_platform_setup_port(&ap->ioaddr, ioport_shift);
168
169 ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
170 (unsigned long long)io_res->start,
171 (unsigned long long)ctl_res->start);
172
173 /* activate */
Tejun Heo9363c382008-04-07 22:47:16 +0900174 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
Akinobu Mita17263902015-01-29 08:30:30 +0900175 irq_flags, sht);
Anton Vorontsovcf036132008-01-09 22:10:22 +0300176}
177EXPORT_SYMBOL_GPL(__pata_platform_probe);
178
Greg Kroah-Hartman0ec24912012-12-21 13:19:58 -0800179static int pata_platform_probe(struct platform_device *pdev)
Anton Vorontsovcf036132008-01-09 22:10:22 +0300180{
181 struct resource *io_res;
182 struct resource *ctl_res;
183 struct resource *irq_res;
Jingoo Han61b8c342013-07-30 17:16:05 +0900184 struct pata_platform_info *pp_info = dev_get_platdata(&pdev->dev);
Paul Mundta20c9e82006-10-27 19:08:48 -0700185
186 /*
187 * Simple resource validation ..
188 */
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900189 if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
Paul Mundta20c9e82006-10-27 19:08:48 -0700190 dev_err(&pdev->dev, "invalid number of resources\n");
191 return -EINVAL;
192 }
193
194 /*
195 * Get the I/O base first
196 */
197 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
198 if (io_res == NULL) {
199 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
200 if (unlikely(io_res == NULL))
201 return -EINVAL;
202 }
203
204 /*
205 * Then the CTL base
206 */
207 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
208 if (ctl_res == NULL) {
209 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
210 if (unlikely(ctl_res == NULL))
211 return -EINVAL;
212 }
213
214 /*
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900215 * And the IRQ
216 */
Anton Vorontsovcf036132008-01-09 22:10:22 +0300217 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
Paul Mundtf7fc0ce2007-11-08 11:15:21 +0900218
Anton Vorontsovcf036132008-01-09 22:10:22 +0300219 return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
220 pp_info ? pp_info->ioport_shift : 0,
Akinobu Mita17263902015-01-29 08:30:30 +0900221 pio_mask, &pata_platform_sht);
Paul Mundta20c9e82006-10-27 19:08:48 -0700222}
223
Paul Mundta20c9e82006-10-27 19:08:48 -0700224static struct platform_driver pata_platform_driver = {
225 .probe = pata_platform_probe,
Brian Norrisccd11962012-11-02 00:46:23 -0700226 .remove = ata_platform_remove_one,
Paul Mundta20c9e82006-10-27 19:08:48 -0700227 .driver = {
228 .name = DRV_NAME,
Paul Mundta20c9e82006-10-27 19:08:48 -0700229 },
230};
231
Axel Lin99c8ea32011-11-27 14:44:26 +0800232module_platform_driver(pata_platform_driver);
Paul Mundta20c9e82006-10-27 19:08:48 -0700233
234module_param(pio_mask, int, 0);
235
236MODULE_AUTHOR("Paul Mundt");
237MODULE_DESCRIPTION("low-level driver for platform device ATA");
238MODULE_LICENSE("GPL");
239MODULE_VERSION(DRV_VERSION);
Kay Sievers458622f2008-04-18 13:41:57 -0700240MODULE_ALIAS("platform:" DRV_NAME);