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/types.h>
27 #include <linux/pci.h>
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
33 #include <linux/init.h>
34 #include <asm/titan_dep.h>
36 #ifdef CONFIG_HYPERTRANSPORT
40 * This function check if the Hypertransport Link Initialization completed. If
41 * it did, then proceed further with scanning bus #2
43 static __inline__ int check_titan_htlink(void)
47 val = *(volatile uint32_t *)(RM9000x2_HTLINK_REG);
49 /* HT Link Initialization completed */
55 static int titan_ht_config_read_dword(struct pci_dev *device,
59 uint32_t address_reg, data_reg;
62 bus = device->bus->number;
63 dev = PCI_SLOT(device->devfn);
64 func = PCI_FUNC(device->devfn);
66 /* XXX Need to change the Bus # */
68 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
71 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
73 address_reg = RM9000x2_OCD_HTCFGA;
74 data_reg = RM9000x2_OCD_HTCFGD;
76 RM9K_WRITE(address_reg, address);
77 RM9K_READ(data_reg, val);
79 return PCIBIOS_SUCCESSFUL;
83 static int titan_ht_config_read_word(struct pci_dev *device,
87 uint32_t address_reg, data_reg;
90 bus = device->bus->number;
91 dev = PCI_SLOT(device->devfn);
92 func = PCI_FUNC(device->devfn);
94 /* XXX Need to change the Bus # */
96 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
99 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
101 address_reg = RM9000x2_OCD_HTCFGA;
102 data_reg = RM9000x2_OCD_HTCFGD;
104 if ((offset & 0x3) == 0)
109 RM9K_WRITE(address_reg, address);
110 RM9K_READ_16(data_reg + offset, val);
112 return PCIBIOS_SUCCESSFUL;
116 u32 longswap(unsigned long l)
118 unsigned char b1,b2,b3,b4;
125 return ((b1<<24) + (b2<<16) + (b3<<8) + b4);
129 static int titan_ht_config_read_byte(struct pci_dev *device,
133 uint32_t address_reg, data_reg;
137 bus = device->bus->number;
138 dev = PCI_SLOT(device->devfn);
139 func = PCI_FUNC(device->devfn);
141 /* XXX Need to change the Bus # */
143 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
146 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
148 address_reg = RM9000x2_OCD_HTCFGA;
149 data_reg = RM9000x2_OCD_HTCFGD;
151 RM9K_WRITE(address_reg, address);
153 if ((offset & 0x3) == 0) {
156 if ((offset & 0x3) == 1) {
159 if ((offset & 0x3) == 2) {
162 if ((offset & 0x3) == 3) {
165 RM9K_READ_8(data_reg + offset1, val);
167 return PCIBIOS_SUCCESSFUL;
171 static int titan_ht_config_write_dword(struct pci_dev *device,
175 uint32_t address_reg, data_reg;
178 bus = device->bus->number;
179 dev = PCI_SLOT(device->devfn);
180 func = PCI_FUNC(device->devfn);
182 /* XXX Need to change the Bus # */
184 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
187 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
189 address_reg = RM9000x2_OCD_HTCFGA;
190 data_reg = RM9000x2_OCD_HTCFGD;
192 RM9K_WRITE(address_reg, address);
193 RM9K_WRITE(data_reg, val);
195 return PCIBIOS_SUCCESSFUL;
198 static int titan_ht_config_write_word(struct pci_dev *device,
202 uint32_t address_reg, data_reg;
205 bus = device->bus->number;
206 dev = PCI_SLOT(device->devfn);
207 func = PCI_FUNC(device->devfn);
209 /* XXX Need to change the Bus # */
211 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
214 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
216 address_reg = RM9000x2_OCD_HTCFGA;
217 data_reg = RM9000x2_OCD_HTCFGD;
219 if ((offset & 0x3) == 0)
224 RM9K_WRITE(address_reg, address);
225 RM9K_WRITE_16(data_reg + offset, val);
227 return PCIBIOS_SUCCESSFUL;
230 static int titan_ht_config_write_byte(struct pci_dev *device,
234 uint32_t address_reg, data_reg;
238 bus = device->bus->number;
239 dev = PCI_SLOT(device->devfn);
240 func = PCI_FUNC(device->devfn);
242 /* XXX Need to change the Bus # */
244 address = (bus << 16) | (dev << 11) | (func << 8) | (offset & 0xfc) |
247 address = (dev << 11) | (func << 8) | (offset & 0xfc) | 0x80000000;
249 address_reg = RM9000x2_OCD_HTCFGA;
250 data_reg = RM9000x2_OCD_HTCFGD;
252 RM9K_WRITE(address_reg, address);
254 if ((offset & 0x3) == 0) {
257 if ((offset & 0x3) == 1) {
260 if ((offset & 0x3) == 2) {
263 if ((offset & 0x3) == 3) {
267 RM9K_WRITE_8(data_reg + offset1, val);
268 return PCIBIOS_SUCCESSFUL;
272 static void titan_pcibios_set_master(struct pci_dev *dev)
275 int bus = dev->bus->number;
277 if (check_titan_htlink())
278 titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
280 cmd |= PCI_COMMAND_MASTER;
282 if (check_titan_htlink())
283 titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
287 int pcibios_enable_resources(struct pci_dev *dev)
293 int bus = dev->bus->number;
295 if (check_titan_htlink())
296 titan_ht_config_read_word(dev, PCI_COMMAND, &cmd);
299 for (idx = 0; idx < 6; idx++) {
300 r = &dev->resource[idx];
301 if (!r->start && r->end) {
303 "PCI: Device %s not available because of "
304 "resource collisions\n", pci_name(dev));
307 if (r->flags & IORESOURCE_IO)
308 cmd |= PCI_COMMAND_IO;
309 if (r->flags & IORESOURCE_MEM)
310 cmd |= PCI_COMMAND_MEMORY;
312 if (cmd != old_cmd) {
313 if (check_titan_htlink())
314 titan_ht_config_write_word(dev, PCI_COMMAND, cmd);
317 if (check_titan_htlink())
318 titan_ht_config_read_byte(dev, PCI_CACHE_LINE_SIZE, &tmp1);
321 printk(KERN_WARNING "PCI setting cache line size to 8 from "
325 if (check_titan_htlink())
326 titan_ht_config_write_byte(dev, PCI_CACHE_LINE_SIZE, 8);
328 if (check_titan_htlink())
329 titan_ht_config_read_byte(dev, PCI_LATENCY_TIMER, &tmp1);
331 if (tmp1 < 32 || tmp1 == 0xff) {
332 printk(KERN_WARNING "PCI setting latency timer to 32 from %d\n",
336 if (check_titan_htlink())
337 titan_ht_config_write_byte(dev, PCI_LATENCY_TIMER, 32);
343 int pcibios_enable_device(struct pci_dev *dev, int mask)
345 return pcibios_enable_resources(dev);
350 void pcibios_update_resource(struct pci_dev *dev, struct resource *root,
351 struct resource *res, int resource)
358 new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
360 reg = PCI_BASE_ADDRESS_0 + 4 * resource;
361 } else if (resource == PCI_ROM_RESOURCE) {
362 res->flags |= IORESOURCE_ROM_ENABLE;
363 reg = dev->rom_base_reg;
366 * Somebody might have asked allocation of a non-standard
372 pci_write_config_dword(dev, reg, new);
373 pci_read_config_dword(dev, reg, &check);
375 ((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK :
376 PCI_BASE_ADDRESS_MEM_MASK)) {
377 printk(KERN_ERR "PCI: Error while updating region "
378 "%s/%d (%08x != %08x)\n", pci_name(dev), resource,
384 void pcibios_align_resource(void *data, struct resource *res,
385 resource_size_t size, resource_size_t align)
387 struct pci_dev *dev = data;
389 if (res->flags & IORESOURCE_IO) {
390 resource_size_t start = res->start;
392 /* We need to avoid collisions with `mirrored' VGA ports
393 and other strange ISA hardware, so we always want the
394 addresses kilobyte aligned. */
396 printk(KERN_ERR "PCI: I/O Region %s/%d too large"
397 " (%ld bytes)\n", pci_name(dev),
398 dev->resource - res, size);
401 start = (start + 1024 - 1) & ~(1024 - 1);
406 struct pci_ops titan_pci_ops = {
407 titan_ht_config_read_byte,
408 titan_ht_config_read_word,
409 titan_ht_config_read_dword,
410 titan_ht_config_write_byte,
411 titan_ht_config_write_word,
412 titan_ht_config_write_dword
415 void __init pcibios_fixup_bus(struct pci_bus *c)
417 titan_ht_pcibios_fixup_bus(c);
420 void __init pcibios_init(void)
423 /* Reset PCI I/O and PCI MEM values */
424 /* XXX Need to add the proper values here */
425 ioport_resource.start = 0xe0000000;
426 ioport_resource.end = 0xe0000000 + 0x20000000 - 1;
427 iomem_resource.start = 0xc0000000;
428 iomem_resource.end = 0xc0000000 + 0x20000000 - 1;
430 /* XXX Need to add bus values */
431 pci_scan_bus(2, &titan_pci_ops, NULL);
432 pci_scan_bus(3, &titan_pci_ops, NULL);
436 * for parsing "pci=" kernel boot arguments.
438 char *pcibios_setup(char *str)
440 printk(KERN_INFO "rr: pcibios_setup\n");
441 /* Nothing to do for now. */
446 unsigned __init int pcibios_assign_all_busses(void)
448 /* We want to use the PCI bus detection done by PMON */
452 #endif /* CONFIG_HYPERTRANSPORT */