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Paul Mundta20c9e82006-10-27 19:08:48 -07001/*
2 * Generic platform device PATA driver
3 *
4 * Copyright (C) 2006 Paul Mundt
5 *
6 * Based on pata_pcmcia:
7 *
8 * Copyright 2005-2006 Red Hat Inc <alan@redhat.com>, all rights reserved.
9 *
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>
22#include <linux/pata_platform.h>
23
24#define DRV_NAME "pata_platform"
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040025#define DRV_VERSION "1.0"
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 */
Al Viro161c8882007-01-30 13:23:45 +000033static int pata_platform_set_mode(struct ata_port *ap, struct ata_device **unused)
Paul Mundta20c9e82006-10-27 19:08:48 -070034{
35 int i;
36
37 for (i = 0; i < ATA_MAX_DEVICES; i++) {
38 struct ata_device *dev = &ap->device[i];
39
40 if (ata_dev_enabled(dev)) {
41 /* We don't really care */
42 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
43 dev->xfer_shift = ATA_SHIFT_PIO;
44 dev->flags |= ATA_DFLAG_PIO;
Alane852f702007-02-20 17:35:43 +000045 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
Paul Mundta20c9e82006-10-27 19:08:48 -070046 }
47 }
Al Viro161c8882007-01-30 13:23:45 +000048 return 0;
Paul Mundta20c9e82006-10-27 19:08:48 -070049}
50
Olof Johanssonb9a3b4d2007-05-09 23:00:20 -050051static int ata_dummy_ret0(struct ata_port *ap) { return 0; }
52
Paul Mundta20c9e82006-10-27 19:08:48 -070053static struct scsi_host_template pata_platform_sht = {
54 .module = THIS_MODULE,
55 .name = DRV_NAME,
56 .ioctl = ata_scsi_ioctl,
57 .queuecommand = ata_scsi_queuecmd,
58 .can_queue = ATA_DEF_QUEUE,
59 .this_id = ATA_SHT_THIS_ID,
60 .sg_tablesize = LIBATA_MAX_PRD,
Paul Mundta20c9e82006-10-27 19:08:48 -070061 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
62 .emulated = ATA_SHT_EMULATED,
63 .use_clustering = ATA_SHT_USE_CLUSTERING,
64 .proc_name = DRV_NAME,
65 .dma_boundary = ATA_DMA_BOUNDARY,
66 .slave_configure = ata_scsi_slave_config,
Tejun Heoc972b602006-11-29 12:10:46 +090067 .slave_destroy = ata_scsi_slave_destroy,
Paul Mundta20c9e82006-10-27 19:08:48 -070068 .bios_param = ata_std_bios_param,
69};
70
71static struct ata_port_operations pata_platform_port_ops = {
72 .set_mode = pata_platform_set_mode,
73
74 .port_disable = ata_port_disable,
75 .tf_load = ata_tf_load,
76 .tf_read = ata_tf_read,
77 .check_status = ata_check_status,
78 .exec_command = ata_exec_command,
79 .dev_select = ata_std_dev_select,
80
81 .freeze = ata_bmdma_freeze,
82 .thaw = ata_bmdma_thaw,
83 .error_handler = ata_bmdma_error_handler,
84 .post_internal_cmd = ata_bmdma_post_internal_cmd,
Alan Cox570cb622007-03-08 22:54:04 +000085 .cable_detect = ata_cable_unknown,
Paul Mundta20c9e82006-10-27 19:08:48 -070086
87 .qc_prep = ata_qc_prep,
88 .qc_issue = ata_qc_issue_prot,
89
Tejun Heo0d5ff562007-02-01 15:06:36 +090090 .data_xfer = ata_data_xfer_noirq,
Paul Mundta20c9e82006-10-27 19:08:48 -070091
Paul Mundta20c9e82006-10-27 19:08:48 -070092 .irq_clear = ata_bmdma_irq_clear,
Akira Iguchi246ce3b2007-01-26 16:27:58 +090093 .irq_on = ata_irq_on,
94 .irq_ack = ata_irq_ack,
Paul Mundta20c9e82006-10-27 19:08:48 -070095
Olof Johanssonb9a3b4d2007-05-09 23:00:20 -050096 .port_start = ata_dummy_ret0,
Paul Mundta20c9e82006-10-27 19:08:48 -070097};
98
99static void pata_platform_setup_port(struct ata_ioports *ioaddr,
100 struct pata_platform_info *info)
101{
102 unsigned int shift = 0;
103
104 /* Fixup the port shift for platforms that need it */
105 if (info && info->ioport_shift)
106 shift = info->ioport_shift;
107
108 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << shift);
109 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << shift);
110 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
111 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << shift);
112 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << shift);
113 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << shift);
114 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << shift);
115 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << shift);
116 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << shift);
117 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << shift);
118}
119
120/**
121 * pata_platform_probe - attach a platform interface
122 * @pdev: platform device
123 *
124 * Register a platform bus IDE interface. Such interfaces are PIO and we
125 * assume do not support IRQ sharing.
126 *
127 * Platform devices are expected to contain 3 resources per port:
128 *
129 * - I/O Base (IORESOURCE_IO or IORESOURCE_MEM)
130 * - CTL Base (IORESOURCE_IO or IORESOURCE_MEM)
131 * - IRQ (IORESOURCE_IRQ)
132 *
133 * If the base resources are both mem types, the ioremap() is handled
134 * here. For IORESOURCE_IO, it's assumed that there's no remapping
135 * necessary.
136 */
137static int __devinit pata_platform_probe(struct platform_device *pdev)
138{
139 struct resource *io_res, *ctl_res;
Tejun Heo5d728822007-04-17 23:44:08 +0900140 struct ata_host *host;
141 struct ata_port *ap;
Sonic Zhang5f45bc52007-06-15 17:45:49 +0800142 struct pata_platform_info *pp_info;
Paul Mundta20c9e82006-10-27 19:08:48 -0700143 unsigned int mmio;
Paul Mundta20c9e82006-10-27 19:08:48 -0700144
145 /*
146 * Simple resource validation ..
147 */
148 if (unlikely(pdev->num_resources != 3)) {
149 dev_err(&pdev->dev, "invalid number of resources\n");
150 return -EINVAL;
151 }
152
153 /*
154 * Get the I/O base first
155 */
156 io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
157 if (io_res == NULL) {
158 io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
159 if (unlikely(io_res == NULL))
160 return -EINVAL;
161 }
162
163 /*
164 * Then the CTL base
165 */
166 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
167 if (ctl_res == NULL) {
168 ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
169 if (unlikely(ctl_res == NULL))
170 return -EINVAL;
171 }
172
173 /*
174 * Check for MMIO
175 */
176 mmio = (( io_res->flags == IORESOURCE_MEM) &&
177 (ctl_res->flags == IORESOURCE_MEM));
178
179 /*
180 * Now that that's out of the way, wire up the port..
181 */
Tejun Heo5d728822007-04-17 23:44:08 +0900182 host = ata_host_alloc(&pdev->dev, 1);
183 if (!host)
184 return -ENOMEM;
185 ap = host->ports[0];
186
187 ap->ops = &pata_platform_port_ops;
188 ap->pio_mask = pio_mask;
189 ap->flags |= ATA_FLAG_SLAVE_POSS;
Paul Mundta20c9e82006-10-27 19:08:48 -0700190
191 /*
192 * Handle the MMIO case
193 */
194 if (mmio) {
Tejun Heo5d728822007-04-17 23:44:08 +0900195 ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, io_res->start,
Tejun Heo0d5ff562007-02-01 15:06:36 +0900196 io_res->end - io_res->start + 1);
Tejun Heo5d728822007-04-17 23:44:08 +0900197 ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
Tejun Heo0d5ff562007-02-01 15:06:36 +0900198 ctl_res->end - ctl_res->start + 1);
Paul Mundta20c9e82006-10-27 19:08:48 -0700199 } else {
Tejun Heo5d728822007-04-17 23:44:08 +0900200 ap->ioaddr.cmd_addr = devm_ioport_map(&pdev->dev, io_res->start,
Tejun Heo0d5ff562007-02-01 15:06:36 +0900201 io_res->end - io_res->start + 1);
Tejun Heo5d728822007-04-17 23:44:08 +0900202 ap->ioaddr.ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start,
Tejun Heo0d5ff562007-02-01 15:06:36 +0900203 ctl_res->end - ctl_res->start + 1);
204 }
Tejun Heo5d728822007-04-17 23:44:08 +0900205 if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900206 dev_err(&pdev->dev, "failed to map IO/CTL base\n");
207 return -ENOMEM;
Paul Mundta20c9e82006-10-27 19:08:48 -0700208 }
209
Tejun Heo5d728822007-04-17 23:44:08 +0900210 ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
Paul Mundta20c9e82006-10-27 19:08:48 -0700211
Sonic Zhang5f45bc52007-06-15 17:45:49 +0800212 pp_info = (struct pata_platform_info *)(pdev->dev.platform_data);
213 pata_platform_setup_port(&ap->ioaddr, pp_info);
Paul Mundta20c9e82006-10-27 19:08:48 -0700214
Tejun Heo5d728822007-04-17 23:44:08 +0900215 /* activate */
216 return ata_host_activate(host, platform_get_irq(pdev, 0), ata_interrupt,
Sonic Zhang5f45bc52007-06-15 17:45:49 +0800217 pp_info->irq_flags, &pata_platform_sht);
Paul Mundta20c9e82006-10-27 19:08:48 -0700218}
219
220/**
221 * pata_platform_remove - unplug a platform interface
222 * @pdev: platform device
223 *
224 * A platform bus ATA device has been unplugged. Perform the needed
225 * cleanup. Also called on module unload for any active devices.
226 */
227static int __devexit pata_platform_remove(struct platform_device *pdev)
228{
229 struct device *dev = &pdev->dev;
230 struct ata_host *host = dev_get_drvdata(dev);
231
Tejun Heo1a68ff12007-02-01 15:05:22 +0900232 ata_host_detach(host);
Paul Mundta20c9e82006-10-27 19:08:48 -0700233
234 return 0;
235}
236
237static struct platform_driver pata_platform_driver = {
238 .probe = pata_platform_probe,
239 .remove = __devexit_p(pata_platform_remove),
240 .driver = {
241 .name = DRV_NAME,
242 .owner = THIS_MODULE,
243 },
244};
245
246static int __init pata_platform_init(void)
247{
248 return platform_driver_register(&pata_platform_driver);
249}
250
251static void __exit pata_platform_exit(void)
252{
253 platform_driver_unregister(&pata_platform_driver);
254}
255module_init(pata_platform_init);
256module_exit(pata_platform_exit);
257
258module_param(pio_mask, int, 0);
259
260MODULE_AUTHOR("Paul Mundt");
261MODULE_DESCRIPTION("low-level driver for platform device ATA");
262MODULE_LICENSE("GPL");
263MODULE_VERSION(DRV_VERSION);