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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/ata_platform.h>
23
24#define DRV_NAME "pata_platform"
25#define DRV_VERSION "1.2"
26
27static int pio_mask = 1;
28
29
30
31
32
33static int pata_platform_set_mode(struct ata_link *link, struct ata_device **unused)
34{
35 struct ata_device *dev;
36
37 ata_for_each_dev(dev, link, ENABLED) {
38
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");
43 }
44 return 0;
45}
46
47static struct scsi_host_template pata_platform_sht = {
48 ATA_PIO_SHT(DRV_NAME),
49};
50
51static struct ata_port_operations pata_platform_port_ops = {
52 .inherits = &ata_sff_port_ops,
53 .sff_data_xfer = ata_sff_data_xfer_noirq,
54 .cable_detect = ata_cable_unknown,
55 .set_mode = pata_platform_set_mode,
56 .port_start = ATA_OP_NULL,
57};
58
59static void pata_platform_setup_port(struct ata_ioports *ioaddr,
60 unsigned int shift)
61{
62
63 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}
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102int __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)
108{
109 struct ata_host *host;
110 struct ata_port *ap;
111 unsigned int mmio;
112 int irq = 0;
113 int irq_flags = 0;
114
115
116
117
118 mmio = (( io_res->flags == IORESOURCE_MEM) &&
119 (ctl_res->flags == IORESOURCE_MEM));
120
121
122
123
124 if (irq_res && irq_res->start > 0) {
125 irq = irq_res->start;
126 irq_flags = irq_res->flags;
127 }
128
129
130
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
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
151
152 if (mmio) {
153 ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
154 resource_size(io_res));
155 ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
156 resource_size(ctl_res));
157 } else {
158 ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
159 resource_size(io_res));
160 ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
161 resource_size(ctl_res));
162 }
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
177 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
178 irq_flags, &pata_platform_sht);
179}
180EXPORT_SYMBOL_GPL(__pata_platform_probe);
181
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186
187
188
189int __pata_platform_remove(struct device *dev)
190{
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;
205
206
207
208
209 if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
210 dev_err(&pdev->dev, "invalid number of resources\n");
211 return -EINVAL;
212 }
213
214
215
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
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
235
236
237 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
238 if (irq_res)
239 irq_res->flags = pp_info ? pp_info->irq_flags : 0;
240
241 return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
242 pp_info ? pp_info->ioport_shift : 0,
243 pio_mask);
244}
245
246static int __devexit pata_platform_remove(struct platform_device *pdev)
247{
248 return __pata_platform_remove(&pdev->dev);
249}
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);
278MODULE_ALIAS("platform:" DRV_NAME);
279