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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 <linux/delay.h>
19#include <scsi/scsi_host.h>
20#include <scsi/scsi_cmnd.h>
21#include <linux/ata.h>
22#include <linux/libata.h>
23#include <linux/mm.h>
24#include <linux/interrupt.h>
25#include <linux/platform_device.h>
26
27#include <asm/setup.h>
28#include <asm/atarihw.h>
29#include <asm/atariints.h>
30#include <asm/atari_stdma.h>
31#include <asm/ide.h>
32
33#define DRV_NAME "pata_falcon"
34#define DRV_VERSION "0.1.0"
35
36static struct scsi_host_template pata_falcon_sht = {
37 ATA_PIO_SHT(DRV_NAME),
38};
39
40static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
41 unsigned char *buf,
42 unsigned int buflen, int rw)
43{
44 struct ata_device *dev = qc->dev;
45 struct ata_port *ap = dev->link->ap;
46 void __iomem *data_addr = ap->ioaddr.data_addr;
47 unsigned int words = buflen >> 1;
48 struct scsi_cmnd *cmd = qc->scsicmd;
49 bool swap = 1;
50
51 if (dev->class == ATA_DEV_ATA && cmd &&
52 !blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)))
53 swap = 0;
54
55
56 if (rw == READ) {
57 if (swap)
58 raw_insw_swapw((u16 *)data_addr, (u16 *)buf, words);
59 else
60 raw_insw((u16 *)data_addr, (u16 *)buf, words);
61 } else {
62 if (swap)
63 raw_outsw_swapw((u16 *)data_addr, (u16 *)buf, words);
64 else
65 raw_outsw((u16 *)data_addr, (u16 *)buf, words);
66 }
67
68
69 if (unlikely(buflen & 0x01)) {
70 unsigned char pad[2] = { };
71
72
73 buf += buflen - 1;
74
75 if (rw == READ) {
76 if (swap)
77 raw_insw_swapw((u16 *)data_addr, (u16 *)pad, 1);
78 else
79 raw_insw((u16 *)data_addr, (u16 *)pad, 1);
80 *buf = pad[0];
81 } else {
82 pad[0] = *buf;
83 if (swap)
84 raw_outsw_swapw((u16 *)data_addr, (u16 *)pad, 1);
85 else
86 raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
87 }
88 words++;
89 }
90
91 return words << 1;
92}
93
94
95
96
97
98static int pata_falcon_set_mode(struct ata_link *link,
99 struct ata_device **unused)
100{
101 struct ata_device *dev;
102
103 ata_for_each_dev(dev, link, ENABLED) {
104
105 dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
106 dev->xfer_shift = ATA_SHIFT_PIO;
107 dev->flags |= ATA_DFLAG_PIO;
108 ata_dev_info(dev, "configured for PIO\n");
109 }
110 return 0;
111}
112
113static struct ata_port_operations pata_falcon_ops = {
114 .inherits = &ata_sff_port_ops,
115 .sff_data_xfer = pata_falcon_data_xfer,
116 .cable_detect = ata_cable_unknown,
117 .set_mode = pata_falcon_set_mode,
118};
119
120static int __init pata_falcon_init_one(struct platform_device *pdev)
121{
122 struct resource *base_mem_res, *ctl_mem_res;
123 struct resource *base_res, *ctl_res, *irq_res;
124 struct ata_host *host;
125 struct ata_port *ap;
126 void __iomem *base;
127 int irq = 0;
128
129 dev_info(&pdev->dev, "Atari Falcon and Q40/Q60 PATA controller\n");
130
131 base_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
132 if (base_res && !devm_request_region(&pdev->dev, base_res->start,
133 resource_size(base_res), DRV_NAME)) {
134 dev_err(&pdev->dev, "resources busy\n");
135 return -EBUSY;
136 }
137
138 ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
139 if (ctl_res && !devm_request_region(&pdev->dev, ctl_res->start,
140 resource_size(ctl_res), DRV_NAME)) {
141 dev_err(&pdev->dev, "resources busy\n");
142 return -EBUSY;
143 }
144
145 base_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
146 if (!base_mem_res)
147 return -ENODEV;
148 if (!devm_request_mem_region(&pdev->dev, base_mem_res->start,
149 resource_size(base_mem_res), DRV_NAME)) {
150 dev_err(&pdev->dev, "resources busy\n");
151 return -EBUSY;
152 }
153
154 ctl_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
155 if (!ctl_mem_res)
156 return -ENODEV;
157
158
159 host = ata_host_alloc(&pdev->dev, 1);
160 if (!host)
161 return -ENOMEM;
162 ap = host->ports[0];
163
164 ap->ops = &pata_falcon_ops;
165 ap->pio_mask = ATA_PIO4;
166 ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
167
168 base = (void __iomem *)base_mem_res->start;
169
170 ap->ioaddr.data_addr = base + 0 + 0 * 4;
171 ap->ioaddr.error_addr = base + 1 + 1 * 4;
172 ap->ioaddr.feature_addr = base + 1 + 1 * 4;
173 ap->ioaddr.nsect_addr = base + 1 + 2 * 4;
174 ap->ioaddr.lbal_addr = base + 1 + 3 * 4;
175 ap->ioaddr.lbam_addr = base + 1 + 4 * 4;
176 ap->ioaddr.lbah_addr = base + 1 + 5 * 4;
177 ap->ioaddr.device_addr = base + 1 + 6 * 4;
178 ap->ioaddr.status_addr = base + 1 + 7 * 4;
179 ap->ioaddr.command_addr = base + 1 + 7 * 4;
180
181 base = (void __iomem *)ctl_mem_res->start;
182 ap->ioaddr.altstatus_addr = base + 1;
183 ap->ioaddr.ctl_addr = base + 1;
184
185 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx",
186 (unsigned long)base_mem_res->start,
187 (unsigned long)ctl_mem_res->start);
188
189 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
190 if (irq_res && irq_res->start > 0) {
191 irq = irq_res->start;
192 } else {
193 ap->flags |= ATA_FLAG_PIO_POLLING;
194 ata_port_desc(ap, "no IRQ, using PIO polling");
195 }
196
197
198 return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
199 IRQF_SHARED, &pata_falcon_sht);
200}
201
202static int __exit pata_falcon_remove_one(struct platform_device *pdev)
203{
204 struct ata_host *host = platform_get_drvdata(pdev);
205
206 ata_host_detach(host);
207
208 return 0;
209}
210
211static struct platform_driver pata_falcon_driver = {
212 .remove = __exit_p(pata_falcon_remove_one),
213 .driver = {
214 .name = "atari-falcon-ide",
215 },
216};
217
218module_platform_driver_probe(pata_falcon_driver, pata_falcon_init_one);
219
220MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
221MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");
222MODULE_LICENSE("GPL v2");
223MODULE_ALIAS("platform:atari-falcon-ide");
224MODULE_VERSION(DRV_VERSION);
225
