aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/pmc-sierra/yosemite/ht.c
blob: 63be40e470db9baae4269f075feabec031fbaed9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
/*
 * Copyright 2003 PMC-Sierra
 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <asm/pci.h>
#include <asm/io.h>

#include <linux/init.h>
#include <asm/titan_dep.h>

#ifdef CONFIG_HYPERTRANSPORT


/*
 * This function check if the Hypertransport Link Initialization completed. If
 * it did, then proceed further with scanning bus #2
 */
static __inline__ int check_titan_htlink(void)
{
        u32 val;

        val = *(volatile uint32_t *)(RM9000x2_HTLINK_REG);
        if (val & 0x00000020)
                /* HT Link Initialization completed */
                return 1;
        else
                return 0;
}

static int titan_ht_config_read_dword(struct pci_dev *device,
                                             int offset, u32* val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                                        0x80000000 | 0x1;
        else
                address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        RM9K_WRITE(address_reg, address);
        RM9K_READ(data_reg, val);

        return PCIBIOS_SUCCESSFUL;
}


static int titan_ht_config_read_word(struct pci_dev *device,
                                             int offset, u16* val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                                0x80000000 | 0x1;
        else
                address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        if ((offset & 0x3) == 0)
                offset = 0x2;
        else
                offset = 0x0;

        RM9K_WRITE(address_reg, address);
        RM9K_READ_16(data_reg + offset, val);

        return PCIBIOS_SUCCESSFUL;
}


u32 longswap(unsigned long l)
{
        unsigned char b1, b2, b3, b4;

        b1 = l&255;
        b2 = (l>>8)&255;
        b3 = (l>>16)&255;
        b4 = (l>>24)&255;

        return ((b1<<24) + (b2<<16) + (b3<<8) + b4);
}


static int titan_ht_config_read_byte(struct pci_dev *device,
                                             int offset, u8* val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;
        int offset1;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                                        0x80000000 | 0x1;
        else
                address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        RM9K_WRITE(address_reg, address);

        if ((offset & 0x3) == 0) {
                offset1 = 0x3;
        }
        if ((offset & 0x3) == 1) {
                offset1 = 0x2;
        }
        if ((offset & 0x3) == 2) {
                offset1 = 0x1;
        }
        if ((offset & 0x3) == 3) {
                offset1 = 0x0;
        }
        RM9K_READ_8(data_reg + offset1, val);

        return PCIBIOS_SUCCESSFUL;
}


static int titan_ht_config_write_dword(struct pci_dev *device,
                                             int offset, u8 val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                                        0x80000000 | 0x1;
        else
              address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        RM9K_WRITE(address_reg, address);
        RM9K_WRITE(data_reg, val);

        return PCIBIOS_SUCCESSFUL;
}

static int titan_ht_config_write_word(struct pci_dev *device,
                                             int offset, u8 val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                0x80000000 | 0x1;
        else
                address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        if ((offset & 0x3) == 0)
                offset = 0x2;
        else
                offset = 0x0;

        RM9K_WRITE(address_reg, address);
        RM9K_WRITE_16(data_reg + offset, val);

        return PCIBIOS_SUCCESSFUL;
}

static int titan_ht_config_write_byte(struct pci_dev *device,
                                             int offset, u8 val)
{
        int dev, bus, func;
        uint32_t address_reg, data_reg;
        uint32_t address;
        int offset1;

        bus = device->bus->number;
        dev = PCI_SLOT(device->devfn);
        func = PCI_FUNC(device->devfn);

	/* XXX Need to change the Bus # */
        if (bus > 2)
                address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
                                0x80000000 | 0x1;
        else
                address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;

        address_reg = RM9000x2_OCD_HTCFGA;
        data_reg =  RM9000x2_OCD_HTCFGD;

        RM9K_WRITE(address_reg, address);

        if ((offset & 0x3) == 0) {
             offset1 = 0x3;
        }
        if ((offset & 0x3) == 1) {
             offset1 = 0x2;
        }
        if ((offset & 0x3) == 2) {
             offset1 = 0x1;
        }
        if ((offset & 0x3) == 3) {
            offset1 = 0x0;
        }

        RM9K_WRITE_8(data_reg + offset1, val);
        return PCIBIOS_SUCCESSFUL;
}


static void titan_pcibios_set_master(struct pci_dev *dev)
{
        u16 cmd;
        int bus = dev->bus->number;

	if (check_titan_htlink())
            titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);

	cmd |= PCI_COMMAND_MASTER;

	if (check_titan_htlink())
            titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
}


int pcibios_enable_resources(struct pci_dev *dev)
{
        u16 cmd, old_cmd;
        u8 tmp1;
        int idx;
        struct resource *r;
        int bus = dev->bus->number;

	if (check_titan_htlink())
            titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);

	old_cmd = cmd;
        for (idx = 0; idx < 6; idx++) {
                r = &dev->resource[idx];
                if (!r->start && r->end) {
                        printk(KERN_ERR
                               "PCI: Device %s not available because of "
                               "resource collisions\n", pci_name(dev));
                        return -EINVAL;
                }
                if (r->flags & IORESOURCE_IO)
                        cmd |= PCI_COMMAND_IO;
                if (r->flags & IORESOURCE_MEM)
                        cmd |= PCI_COMMAND_MEMORY;
        }
        if (cmd != old_cmd) {
		if (check_titan_htlink())
                   titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
	}

	if (check_titan_htlink())
		titan_ht_config_read_byte(dev, PCI_CACHE_LINE_SIZE, &tmp1);

	if (tmp1 != 8) {
                printk(KERN_WARNING "PCI setting cache line size to 8 from "
                       "%d\n", tmp1);
	}

	if (check_titan_htlink())
		titan_ht_config_write_byte(dev, PCI_CACHE_LINE_SIZE, 8);

	if (check_titan_htlink())
		titan_ht_config_read_byte(dev, PCI_LATENCY_TIMER, &tmp1);

	if (tmp1 < 32 || tmp1 == 0xff) {
                printk(KERN_WARNING "PCI setting latency timer to 32 from %d\n",
                       tmp1);
	}

	if (check_titan_htlink())
		titan_ht_config_write_byte(dev, PCI_LATENCY_TIMER, 32);

	return 0;
}


int pcibios_enable_device(struct pci_dev *dev, int mask)
{
        return pcibios_enable_resources(dev);
}

resource_size_t pcibios_align_resource(void *data, const struct resource *res,
				resource_size_t size, resource_size_t align)
{
        struct pci_dev *dev = data;
	resource_size_t start = res->start;

        if (res->flags & IORESOURCE_IO) {
                /* We need to avoid collisions with `mirrored' VGA ports
                   and other strange ISA hardware, so we always want the
                   addresses kilobyte aligned.  */
                if (size > 0x100) {
                        printk(KERN_ERR "PCI: I/O Region %s/%d too large"
                               " (%ld bytes)\n", pci_name(dev),
                                dev->resource - res, size);
                }

                start = (start + 1024 - 1) & ~(1024 - 1);
        }

	return start;
}

struct pci_ops titan_pci_ops = {
        titan_ht_config_read_byte,
        titan_ht_config_read_word,
        titan_ht_config_read_dword,
        titan_ht_config_write_byte,
        titan_ht_config_write_word,
        titan_ht_config_write_dword
};

void __init pcibios_fixup_bus(struct pci_bus *c)
{
        titan_ht_pcibios_fixup_bus(c);
}

void __init pcibios_init(void)
{

        /* Reset PCI I/O and PCI MEM values */
	/* XXX Need to add the proper values here */
        ioport_resource.start = 0xe0000000;
        ioport_resource.end   = 0xe0000000 + 0x20000000 - 1;
        iomem_resource.start  = 0xc0000000;
        iomem_resource.end    = 0xc0000000 + 0x20000000 - 1;

	/* XXX Need to add bus values */
        pci_scan_bus(2, &titan_pci_ops, NULL);
        pci_scan_bus(3, &titan_pci_ops, NULL);
}

/*
 * for parsing "pci=" kernel boot arguments.
 */
char *pcibios_setup(char *str)
{
        printk(KERN_INFO "rr: pcibios_setup\n");
        /* Nothing to do for now.  */

        return str;
}

unsigned __init int pcibios_assign_all_busses(void)
{
        /* We want to use the PCI bus detection done by PMON */
        return 0;
}

#endif /* CONFIG_HYPERTRANSPORT */