2 * Copyright 2003 PMC-Sierra
3 * Author: Manish Lachwani (lachwani@pmc-sierra.com)
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
11 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
13 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
14 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
15 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
16 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
17 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
18 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
19 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/config.h>
27 #include <linux/types.h>
28 #include <linux/pci.h>
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
34 #include <linux/init.h>
35 #include <asm/titan_dep.h>
37 #ifdef CONFIG_HYPERTRANSPORT
41 * This function check if the Hypertransport Link Initialization completed. If
42 * it did, then proceed further with scanning bus #2
44 static __inline__ int check_titan_htlink(void)
48 val = *(volatile uint32_t *)(RM9000x2_HTLINK_REG);
50 /* HT Link Initialization completed */
56 static int titan_ht_config_read_dword(struct pci_dev *device,
60 uint32_t address_reg, data_reg;
63 bus = device->bus->number;
64 dev = PCI_SLOT(device->devfn);
65 func = PCI_FUNC(device->devfn);
67 /* XXX Need to change the Bus # */
69 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
72 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
74 address_reg = RM9000x2_OCD_HTCFGA;
75 data_reg = RM9000x2_OCD_HTCFGD;
77 RM9K_WRITE(address_reg, address);
78 RM9K_READ(data_reg, val);
80 return PCIBIOS_SUCCESSFUL;
84 static int titan_ht_config_read_word(struct pci_dev *device,
88 uint32_t address_reg, data_reg;
91 bus = device->bus->number;
92 dev = PCI_SLOT(device->devfn);
93 func = PCI_FUNC(device->devfn);
95 /* XXX Need to change the Bus # */
97 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
100 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
102 address_reg = RM9000x2_OCD_HTCFGA;
103 data_reg = RM9000x2_OCD_HTCFGD;
105 if ((offset & 0x3) == 0)
110 RM9K_WRITE(address_reg, address);
111 RM9K_READ_16(data_reg + offset, val);
113 return PCIBIOS_SUCCESSFUL;
117 u32 longswap(unsigned long l)
119 unsigned char b1,b2,b3,b4;
126 return ((b1<<24) + (b2<<16) + (b3<<8) + b4);
130 static int titan_ht_config_read_byte(struct pci_dev *device,
134 uint32_t address_reg, data_reg;
138 bus = device->bus->number;
139 dev = PCI_SLOT(device->devfn);
140 func = PCI_FUNC(device->devfn);
142 /* XXX Need to change the Bus # */
144 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
147 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
149 address_reg = RM9000x2_OCD_HTCFGA;
150 data_reg = RM9000x2_OCD_HTCFGD;
152 RM9K_WRITE(address_reg, address);
154 if ((offset & 0x3) == 0) {
157 if ((offset & 0x3) == 1) {
160 if ((offset & 0x3) == 2) {
163 if ((offset & 0x3) == 3) {
166 RM9K_READ_8(data_reg + offset1, val);
168 return PCIBIOS_SUCCESSFUL;
172 static int titan_ht_config_write_dword(struct pci_dev *device,
176 uint32_t address_reg, data_reg;
179 bus = device->bus->number;
180 dev = PCI_SLOT(device->devfn);
181 func = PCI_FUNC(device->devfn);
183 /* XXX Need to change the Bus # */
185 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
188 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
190 address_reg = RM9000x2_OCD_HTCFGA;
191 data_reg = RM9000x2_OCD_HTCFGD;
193 RM9K_WRITE(address_reg, address);
194 RM9K_WRITE(data_reg, val);
196 return PCIBIOS_SUCCESSFUL;
199 static int titan_ht_config_write_word(struct pci_dev *device,
203 uint32_t address_reg, data_reg;
206 bus = device->bus->number;
207 dev = PCI_SLOT(device->devfn);
208 func = PCI_FUNC(device->devfn);
210 /* XXX Need to change the Bus # */
212 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
215 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
217 address_reg = RM9000x2_OCD_HTCFGA;
218 data_reg = RM9000x2_OCD_HTCFGD;
220 if ((offset & 0x3) == 0)
225 RM9K_WRITE(address_reg, address);
226 RM9K_WRITE_16(data_reg + offset, val);
228 return PCIBIOS_SUCCESSFUL;
231 static int titan_ht_config_write_byte(struct pci_dev *device,
235 uint32_t address_reg, data_reg;
239 bus = device->bus->number;
240 dev = PCI_SLOT(device->devfn);
241 func = PCI_FUNC(device->devfn);
243 /* XXX Need to change the Bus # */
245 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
248 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
250 address_reg = RM9000x2_OCD_HTCFGA;
251 data_reg = RM9000x2_OCD_HTCFGD;
253 RM9K_WRITE(address_reg, address);
255 if ((offset & 0x3) == 0) {
258 if ((offset & 0x3) == 1) {
261 if ((offset & 0x3) == 2) {
264 if ((offset & 0x3) == 3) {
268 RM9K_WRITE_8(data_reg + offset1, val);
269 return PCIBIOS_SUCCESSFUL;
273 static void titan_pcibios_set_master(struct pci_dev *dev)
276 int bus = dev->bus->number;
278 if (check_titan_htlink())
279 titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
281 cmd |= PCI_COMMAND_MASTER;
283 if (check_titan_htlink())
284 titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
288 int pcibios_enable_resources(struct pci_dev *dev)
294 int bus = dev->bus->number;
296 if (check_titan_htlink())
297 titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
300 for (idx = 0; idx < 6; idx++) {
301 r = &dev->resource[idx];
302 if (!r->start && r->end) {
304 "PCI: Device %s not available because of "
305 "resource collisions\n", pci_name(dev));
308 if (r->flags & IORESOURCE_IO)
309 cmd |= PCI_COMMAND_IO;
310 if (r->flags & IORESOURCE_MEM)
311 cmd |= PCI_COMMAND_MEMORY;
313 if (cmd != old_cmd) {
314 if (check_titan_htlink())
315 titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
318 if (check_titan_htlink())
319 titan_ht_config_read_byte(dev, PCI_CACHE_LINE_SIZE, &tmp1);
322 printk(KERN_WARNING "PCI setting cache line size to 8 from "
326 if (check_titan_htlink())
327 titan_ht_config_write_byte(dev, PCI_CACHE_LINE_SIZE, 8);
329 if (check_titan_htlink())
330 titan_ht_config_read_byte(dev, PCI_LATENCY_TIMER, &tmp1);
332 if (tmp1 < 32 || tmp1 == 0xff) {
333 printk(KERN_WARNING "PCI setting latency timer to 32 from %d\n",
337 if (check_titan_htlink())
338 titan_ht_config_write_byte(dev, PCI_LATENCY_TIMER, 32);
344 int pcibios_enable_device(struct pci_dev *dev, int mask)
346 return pcibios_enable_resources(dev);
351 void pcibios_update_resource(struct pci_dev *dev, struct resource *root,
352 struct resource *res, int resource)
359 new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
361 reg = PCI_BASE_ADDRESS_0 + 4 * resource;
362 } else if (resource == PCI_ROM_RESOURCE) {
363 res->flags |= IORESOURCE_ROM_ENABLE;
364 reg = dev->rom_base_reg;
367 * Somebody might have asked allocation of a non-standard
373 pci_write_config_dword(dev, reg, new);
374 pci_read_config_dword(dev, reg, &check);
376 ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK :
377 PCI_BASE_ADDRESS_MEM_MASK)) {
378 printk(KERN_ERR "PCI: Error while updating region "
379 "%s/%d (%08x != %08x)\n", pci_name(dev), resource,
385 void pcibios_align_resource(void *data, struct resource *res,
386 unsigned long size, unsigned long align)
388 struct pci_dev *dev = data;
390 if (res->flags & IORESOURCE_IO) {
391 unsigned long start = res->start;
393 /* We need to avoid collisions with `mirrored' VGA ports
394 and other strange ISA hardware, so we always want the
395 addresses kilobyte aligned. */
397 printk(KERN_ERR "PCI: I/O Region %s/%d too large"
398 " (%ld bytes)\n", pci_name(dev),
399 dev->resource - res, size);
402 start = (start + 1024 - 1) & ~(1024 - 1);
407 struct pci_ops titan_pci_ops = {
408 titan_ht_config_read_byte,
409 titan_ht_config_read_word,
410 titan_ht_config_read_dword,
411 titan_ht_config_write_byte,
412 titan_ht_config_write_word,
413 titan_ht_config_write_dword
416 void __init pcibios_fixup_bus(struct pci_bus *c)
418 titan_ht_pcibios_fixup_bus(c);
421 void __init pcibios_init(void)
424 /* Reset PCI I/O and PCI MEM values */
425 /* XXX Need to add the proper values here */
426 ioport_resource.start = 0xe0000000;
427 ioport_resource.end = 0xe0000000 + 0x20000000 - 1;
428 iomem_resource.start = 0xc0000000;
429 iomem_resource.end = 0xc0000000 + 0x20000000 - 1;
431 /* XXX Need to add bus values */
432 pci_scan_bus(2, &titan_pci_ops, NULL);
433 pci_scan_bus(3, &titan_pci_ops, NULL);
437 * for parsing "pci=" kernel boot arguments.
439 char *pcibios_setup(char *str)
441 printk(KERN_INFO "rr: pcibios_setup\n");
442 /* Nothing to do for now. */
447 unsigned __init int pcibios_assign_all_busses(void)
449 /* We want to use the PCI bus detection done by PMON */
453 #endif /* CONFIG_HYPERTRANSPORT */