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Diffstat (limited to 'drivers/ide/tx4938ide.c')
-rw-r--r--drivers/ide/tx4938ide.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
new file mode 100644
index 000000000000..fa660f931a11
--- /dev/null
+++ b/drivers/ide/tx4938ide.c
@@ -0,0 +1,310 @@
1/*
2 * TX4938 internal IDE driver
3 * Based on tx4939ide.c.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * (C) Copyright TOSHIBA CORPORATION 2005-2007
10 */
11
12#include <linux/module.h>
13#include <linux/types.h>
14#include <linux/ide.h>
15#include <linux/init.h>
16#include <linux/platform_device.h>
17#include <linux/io.h>
18#include <asm/txx9/tx4938.h>
19
20static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
21 unsigned int gbus_clock,
22 u8 pio)
23{
24 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
25 u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
26 unsigned int sp = (cr >> 4) & 3;
27 unsigned int clock = gbus_clock / (4 - sp);
28 unsigned int cycle = 1000000000 / clock;
29 unsigned int wt, shwt;
30
31 /* Minimum DIOx- active time */
32 wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
33 /* IORDY setup time: 35ns */
34 wt = max(wt, DIV_ROUND_UP(35, cycle));
35 /* actual wait-cycle is max(wt & ~1, 1) */
36 if (wt > 2 && (wt & 1))
37 wt++;
38 wt &= ~1;
39 /* Address-valid to DIOR/DIOW setup */
40 shwt = DIV_ROUND_UP(t->setup, cycle);
41
42 pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
43 ebus_ch, cycle, wt, shwt);
44
45 __raw_writeq((cr & ~(0x3f007ull)) | (wt << 12) | shwt,
46 &tx4938_ebuscptr->cr[ebus_ch]);
47}
48
49static void tx4938ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
50{
51 ide_hwif_t *hwif = drive->hwif;
52 struct tx4938ide_platform_info *pdata = hwif->dev->platform_data;
53 u8 safe = pio;
54 ide_drive_t *pair;
55
56 pair = ide_get_pair_dev(drive);
57 if (pair)
58 safe = min(safe, ide_get_best_pio_mode(pair, 255, 5));
59 tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
60}
61
62#ifdef __BIG_ENDIAN
63
64/* custom iops (independent from SWAP_IO_SPACE) */
65static u8 tx4938ide_inb(unsigned long port)
66{
67 return __raw_readb((void __iomem *)port);
68}
69
70static void tx4938ide_outb(u8 value, unsigned long port)
71{
72 __raw_writeb(value, (void __iomem *)port);
73}
74
75static void tx4938ide_tf_load(ide_drive_t *drive, ide_task_t *task)
76{
77 ide_hwif_t *hwif = drive->hwif;
78 struct ide_io_ports *io_ports = &hwif->io_ports;
79 struct ide_taskfile *tf = &task->tf;
80 u8 HIHI = task->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
81
82 if (task->tf_flags & IDE_TFLAG_FLAGGED)
83 HIHI = 0xFF;
84
85 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
86 u16 data = (tf->hob_data << 8) | tf->data;
87
88 /* no endian swap */
89 __raw_writew(data, (void __iomem *)io_ports->data_addr);
90 }
91
92 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
93 tx4938ide_outb(tf->hob_feature, io_ports->feature_addr);
94 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
95 tx4938ide_outb(tf->hob_nsect, io_ports->nsect_addr);
96 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
97 tx4938ide_outb(tf->hob_lbal, io_ports->lbal_addr);
98 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
99 tx4938ide_outb(tf->hob_lbam, io_ports->lbam_addr);
100 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
101 tx4938ide_outb(tf->hob_lbah, io_ports->lbah_addr);
102
103 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
104 tx4938ide_outb(tf->feature, io_ports->feature_addr);
105 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
106 tx4938ide_outb(tf->nsect, io_ports->nsect_addr);
107 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
108 tx4938ide_outb(tf->lbal, io_ports->lbal_addr);
109 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
110 tx4938ide_outb(tf->lbam, io_ports->lbam_addr);
111 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
112 tx4938ide_outb(tf->lbah, io_ports->lbah_addr);
113
114 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
115 tx4938ide_outb((tf->device & HIHI) | drive->select,
116 io_ports->device_addr);
117}
118
119static void tx4938ide_tf_read(ide_drive_t *drive, ide_task_t *task)
120{
121 ide_hwif_t *hwif = drive->hwif;
122 struct ide_io_ports *io_ports = &hwif->io_ports;
123 struct ide_taskfile *tf = &task->tf;
124
125 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
126 u16 data;
127
128 /* no endian swap */
129 data = __raw_readw((void __iomem *)io_ports->data_addr);
130 tf->data = data & 0xff;
131 tf->hob_data = (data >> 8) & 0xff;
132 }
133
134 /* be sure we're looking at the low order bits */
135 tx4938ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
136
137 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
138 tf->feature = tx4938ide_inb(io_ports->feature_addr);
139 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
140 tf->nsect = tx4938ide_inb(io_ports->nsect_addr);
141 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
142 tf->lbal = tx4938ide_inb(io_ports->lbal_addr);
143 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
144 tf->lbam = tx4938ide_inb(io_ports->lbam_addr);
145 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
146 tf->lbah = tx4938ide_inb(io_ports->lbah_addr);
147 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
148 tf->device = tx4938ide_inb(io_ports->device_addr);
149
150 if (task->tf_flags & IDE_TFLAG_LBA48) {
151 tx4938ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
152
153 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
154 tf->hob_feature =
155 tx4938ide_inb(io_ports->feature_addr);
156 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
157 tf->hob_nsect = tx4938ide_inb(io_ports->nsect_addr);
158 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
159 tf->hob_lbal = tx4938ide_inb(io_ports->lbal_addr);
160 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
161 tf->hob_lbam = tx4938ide_inb(io_ports->lbam_addr);
162 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
163 tf->hob_lbah = tx4938ide_inb(io_ports->lbah_addr);
164 }
165}
166
167static void tx4938ide_input_data_swap(ide_drive_t *drive, struct request *rq,
168 void *buf, unsigned int len)
169{
170 unsigned long port = drive->hwif->io_ports.data_addr;
171 unsigned short *ptr = buf;
172 unsigned int count = (len + 1) / 2;
173
174 while (count--)
175 *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
176 __ide_flush_dcache_range((unsigned long)buf, count * 2);
177}
178
179static void tx4938ide_output_data_swap(ide_drive_t *drive, struct request *rq,
180 void *buf, unsigned int len)
181{
182 unsigned long port = drive->hwif->io_ports.data_addr;
183 unsigned short *ptr = buf;
184 unsigned int count = (len + 1) / 2;
185
186 while (count--) {
187 __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
188 ptr++;
189 }
190 __ide_flush_dcache_range((unsigned long)buf, count * 2);
191}
192
193static const struct ide_tp_ops tx4938ide_tp_ops = {
194 .exec_command = ide_exec_command,
195 .read_status = ide_read_status,
196 .read_altstatus = ide_read_altstatus,
197 .read_sff_dma_status = ide_read_sff_dma_status,
198
199 .set_irq = ide_set_irq,
200
201 .tf_load = tx4938ide_tf_load,
202 .tf_read = tx4938ide_tf_read,
203
204 .input_data = tx4938ide_input_data_swap,
205 .output_data = tx4938ide_output_data_swap,
206};
207
208#endif /* __BIG_ENDIAN */
209
210static const struct ide_port_ops tx4938ide_port_ops = {
211 .set_pio_mode = tx4938ide_set_pio_mode,
212};
213
214static const struct ide_port_info tx4938ide_port_info __initdata = {
215 .port_ops = &tx4938ide_port_ops,
216#ifdef __BIG_ENDIAN
217 .tp_ops = &tx4938ide_tp_ops,
218#endif
219 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
220 .pio_mask = ATA_PIO5,
221};
222
223static int __init tx4938ide_probe(struct platform_device *pdev)
224{
225 hw_regs_t hw;
226 hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
227 struct ide_host *host;
228 struct resource *res;
229 struct tx4938ide_platform_info *pdata = pdev->dev.platform_data;
230 int irq, ret, i;
231 unsigned long mapbase;
232 struct ide_port_info d = tx4938ide_port_info;
233
234 irq = platform_get_irq(pdev, 0);
235 if (irq < 0)
236 return -ENODEV;
237 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
238 if (!res)
239 return -ENODEV;
240
241 if (!devm_request_mem_region(&pdev->dev, res->start,
242 res->end - res->start + 1, "tx4938ide"))
243 return -EBUSY;
244 mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
245 res->end - res->start + 1);
246 if (!mapbase)
247 return -EBUSY;
248
249 memset(&hw, 0, sizeof(hw));
250 if (pdata->ioport_shift) {
251 unsigned long port = mapbase;
252
253 hw.io_ports_array[0] = port;
254#ifdef __BIG_ENDIAN
255 port++;
256#endif
257 for (i = 1; i <= 7; i++)
258 hw.io_ports_array[i] =
259 port + (i << pdata->ioport_shift);
260 hw.io_ports.ctl_addr =
261 port + 0x10000 + (6 << pdata->ioport_shift);
262 } else
263 ide_std_init_ports(&hw, mapbase, mapbase + 0x10006);
264 hw.irq = irq;
265 hw.dev = &pdev->dev;
266
267 pr_info("TX4938 IDE interface (base %#lx, irq %d)\n", mapbase, hw.irq);
268 if (pdata->gbus_clock)
269 tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
270 else
271 d.port_ops = NULL;
272 ret = ide_host_add(&d, hws, &host);
273 if (ret)
274 return ret;
275 platform_set_drvdata(pdev, host);
276 return 0;
277}
278
279static int __exit tx4938ide_remove(struct platform_device *pdev)
280{
281 struct ide_host *host = platform_get_drvdata(pdev);
282
283 ide_host_remove(host);
284 return 0;
285}
286
287static struct platform_driver tx4938ide_driver = {
288 .driver = {
289 .name = "tx4938ide",
290 .owner = THIS_MODULE,
291 },
292 .remove = __exit_p(tx4938ide_remove),
293};
294
295static int __init tx4938ide_init(void)
296{
297 return platform_driver_probe(&tx4938ide_driver, tx4938ide_probe);
298}
299
300static void __exit tx4938ide_exit(void)
301{
302 platform_driver_unregister(&tx4938ide_driver);
303}
304
305module_init(tx4938ide_init);
306module_exit(tx4938ide_exit);
307
308MODULE_DESCRIPTION("TX4938 internal IDE driver");
309MODULE_LICENSE("GPL");
310MODULE_ALIAS("platform:tx4938ide");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-29 23:52:13 -0500