3 ** PCI Lower Bus Adapter (LBA) manager
5 ** (c) Copyright 1999,2000 Grant Grundler
6 ** (c) Copyright 1999,2000 Hewlett-Packard Company
8 ** This program is free software; you can redistribute it and/or modify
9 ** it under the terms of the GNU General Public License as published by
10 ** the Free Software Foundation; either version 2 of the License, or
11 ** (at your option) any later version.
14 ** This module primarily provides access to PCI bus (config/IOport
15 ** spaces) on platforms with an SBA/LBA chipset. A/B/C/J/L/N-class
16 ** with 4 digit model numbers - eg C3000 (and A400...sigh).
18 ** LBA driver isn't as simple as the Dino driver because:
19 ** (a) this chip has substantial bug fixes between revisions
20 ** (Only one Dino bug has a software workaround :^( )
21 ** (b) has more options which we don't (yet) support (DMA hints, OLARD)
22 ** (c) IRQ support lives in the I/O SAPIC driver (not with PCI driver)
23 ** (d) play nicely with both PAT and "Legacy" PA-RISC firmware (PDC).
24 ** (dino only deals with "Legacy" PDC)
26 ** LBA driver passes the I/O SAPIC HPA to the I/O SAPIC driver.
27 ** (I/O SAPIC is integratd in the LBA chip).
29 ** FIXME: Add support to SBA and LBA drivers for DMA hint sets
30 ** FIXME: Add support for PCI card hot-plug (OLARD).
33 #include <linux/delay.h>
34 #include <linux/types.h>
35 #include <linux/kernel.h>
36 #include <linux/spinlock.h>
37 #include <linux/init.h> /* for __init */
38 #include <linux/pci.h>
39 #include <linux/ioport.h>
40 #include <linux/slab.h>
42 #include <asm/byteorder.h>
44 #include <asm/pdcpat.h>
47 #include <asm/ropes.h>
48 #include <asm/hardware.h> /* for register_parisc_driver() stuff */
49 #include <asm/parisc-device.h>
50 #include <asm/io.h> /* read/write stuff */
52 #undef DEBUG_LBA /* general stuff */
53 #undef DEBUG_LBA_PORT /* debug I/O Port access */
54 #undef DEBUG_LBA_CFG /* debug Config Space Access (ie PCI Bus walk) */
55 #undef DEBUG_LBA_PAT /* debug PCI Resource Mgt code - PDC PAT only */
57 #undef FBB_SUPPORT /* Fast Back-Back xfers - NOT READY YET */
61 #define DBG(x...) printk(x)
67 #define DBG_PORT(x...) printk(x)
69 #define DBG_PORT(x...)
73 #define DBG_CFG(x...) printk(x)
79 #define DBG_PAT(x...) printk(x)
86 ** Config accessor functions only pass in the 8-bit bus number and not
87 ** the 8-bit "PCI Segment" number. Each LBA will be assigned a PCI bus
88 ** number based on what firmware wrote into the scratch register.
90 ** The "secondary" bus number is set to this before calling
91 ** pci_register_ops(). If any PPB's are present, the scan will
92 ** discover them and update the "secondary" and "subordinate"
93 ** fields in the pci_bus structure.
95 ** Changes in the configuration *may* result in a different
96 ** bus number for each LBA depending on what firmware does.
99 #define MODULE_NAME "LBA"
101 /* non-postable I/O port space, densely packed */
102 #define LBA_PORT_BASE (PCI_F_EXTEND | 0xfee00000UL)
103 static void __iomem *astro_iop_base __read_mostly;
108 #define LBA_FLAG_SKIP_PROBE 0x10
110 #define LBA_SKIP_PROBE(d) ((d)->flags & LBA_FLAG_SKIP_PROBE)
113 /* Looks nice and keeps the compiler happy */
114 #define LBA_DEV(d) ({ \
117 (struct lba_device *)__pdata; })
120 ** Only allow 8 subsidiary busses per LBA
121 ** Problem is the PCI bus numbering is globally shared.
123 #define LBA_MAX_NUM_BUSES 8
125 /************************************
126 * LBA register read and write support
128 * BE WARNED: register writes are posted.
129 * (ie follow writes which must reach HW with a read)
131 #define READ_U8(addr) __raw_readb(addr)
132 #define READ_U16(addr) __raw_readw(addr)
133 #define READ_U32(addr) __raw_readl(addr)
134 #define WRITE_U8(value, addr) __raw_writeb(value, addr)
135 #define WRITE_U16(value, addr) __raw_writew(value, addr)
136 #define WRITE_U32(value, addr) __raw_writel(value, addr)
138 #define READ_REG8(addr) readb(addr)
139 #define READ_REG16(addr) readw(addr)
140 #define READ_REG32(addr) readl(addr)
141 #define READ_REG64(addr) readq(addr)
142 #define WRITE_REG8(value, addr) writeb(value, addr)
143 #define WRITE_REG16(value, addr) writew(value, addr)
144 #define WRITE_REG32(value, addr) writel(value, addr)
147 #define LBA_CFG_TOK(bus,dfn) ((u32) ((bus)<<16 | (dfn)<<8))
148 #define LBA_CFG_BUS(tok) ((u8) ((tok)>>16))
149 #define LBA_CFG_DEV(tok) ((u8) ((tok)>>11) & 0x1f)
150 #define LBA_CFG_FUNC(tok) ((u8) ((tok)>>8 ) & 0x7)
154 ** Extract LBA (Rope) number from HPA
155 ** REVISIT: 16 ropes for Stretch/Ike?
157 #define ROPES_PER_IOC 8
158 #define LBA_NUM(x) ((((unsigned long) x) >> 13) & (ROPES_PER_IOC-1))
162 lba_dump_res(struct resource *r, int d)
169 printk(KERN_DEBUG "(%p)", r->parent);
170 for (i = d; i ; --i) printk(" ");
171 printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n", r,
172 (long)r->start, (long)r->end, r->flags);
173 lba_dump_res(r->child, d+2);
174 lba_dump_res(r->sibling, d);
179 ** LBA rev 2.0, 2.1, 2.2, and 3.0 bus walks require a complex
180 ** workaround for cfg cycles:
181 ** -- preserve LBA state
182 ** -- prevent any DMA from occurring
183 ** -- turn on smart mode
184 ** -- probe with config writes before doing config reads
185 ** -- check ERROR_STATUS
186 ** -- clear ERROR_STATUS
187 ** -- restore LBA state
189 ** The workaround is only used for device discovery.
192 static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d)
194 u8 first_bus = d->hba.hba_bus->busn_res.start;
195 u8 last_sub_bus = d->hba.hba_bus->busn_res.end;
197 if ((bus < first_bus) ||
198 (bus > last_sub_bus) ||
199 ((bus - first_bus) >= LBA_MAX_NUM_BUSES)) {
208 #define LBA_CFG_SETUP(d, tok) { \
209 /* Save contents of error config register. */ \
210 error_config = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); \
212 /* Save contents of status control register. */ \
213 status_control = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); \
215 /* For LBA rev 2.0, 2.1, 2.2, and 3.0, we must disable DMA \
216 ** arbitration for full bus walks. \
218 /* Save contents of arb mask register. */ \
219 arb_mask = READ_REG32(d->hba.base_addr + LBA_ARB_MASK); \
222 * Turn off all device arbitration bits (i.e. everything \
223 * except arbitration enable bit). \
225 WRITE_REG32(0x1, d->hba.base_addr + LBA_ARB_MASK); \
228 * Set the smart mode bit so that master aborts don't cause \
229 * LBA to go into PCI fatal mode (required). \
231 WRITE_REG32(error_config | LBA_SMART_MODE, d->hba.base_addr + LBA_ERROR_CONFIG); \
235 #define LBA_CFG_PROBE(d, tok) { \
237 * Setup Vendor ID write and read back the address register \
238 * to make sure that LBA is the bus master. \
240 WRITE_REG32(tok | PCI_VENDOR_ID, (d)->hba.base_addr + LBA_PCI_CFG_ADDR);\
242 * Read address register to ensure that LBA is the bus master, \
243 * which implies that DMA traffic has stopped when DMA arb is off. \
245 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
247 * Generate a cfg write cycle (will have no affect on \
248 * Vendor ID register since read-only). \
250 WRITE_REG32(~0, (d)->hba.base_addr + LBA_PCI_CFG_DATA); \
252 * Make sure write has completed before proceeding further, \
253 * i.e. before setting clear enable. \
255 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
261 * -- Can't tell if config cycle got the error.
263 * OV bit is broken until rev 4.0, so can't use OV bit and
264 * LBA_ERROR_LOG_ADDR to tell if error belongs to config cycle.
266 * As of rev 4.0, no longer need the error check.
268 * -- Even if we could tell, we still want to return -1
269 * for **ANY** error (not just master abort).
271 * -- Only clear non-fatal errors (we don't want to bring
272 * LBA out of pci-fatal mode).
274 * Actually, there is still a race in which
275 * we could be clearing a fatal error. We will
276 * live with this during our initial bus walk
277 * until rev 4.0 (no driver activity during
278 * initial bus walk). The initial bus walk
279 * has race conditions concerning the use of
280 * smart mode as well.
283 #define LBA_MASTER_ABORT_ERROR 0xc
284 #define LBA_FATAL_ERROR 0x10
286 #define LBA_CFG_MASTER_ABORT_CHECK(d, base, tok, error) { \
287 u32 error_status = 0; \
289 * Set clear enable (CE) bit. Unset by HW when new \
290 * errors are logged -- LBA HW ERS section 14.3.3). \
292 WRITE_REG32(status_control | CLEAR_ERRLOG_ENABLE, base + LBA_STAT_CTL); \
293 error_status = READ_REG32(base + LBA_ERROR_STATUS); \
294 if ((error_status & 0x1f) != 0) { \
296 * Fail the config read request. \
299 if ((error_status & LBA_FATAL_ERROR) == 0) { \
301 * Clear error status (if fatal bit not set) by setting \
302 * clear error log bit (CL). \
304 WRITE_REG32(status_control | CLEAR_ERRLOG, base + LBA_STAT_CTL); \
309 #define LBA_CFG_TR4_ADDR_SETUP(d, addr) \
310 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR);
312 #define LBA_CFG_ADDR_SETUP(d, addr) { \
313 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
315 * Read address register to ensure that LBA is the bus master, \
316 * which implies that DMA traffic has stopped when DMA arb is off. \
318 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
322 #define LBA_CFG_RESTORE(d, base) { \
324 * Restore status control register (turn off clear enable). \
326 WRITE_REG32(status_control, base + LBA_STAT_CTL); \
328 * Restore error config register (turn off smart mode). \
330 WRITE_REG32(error_config, base + LBA_ERROR_CONFIG); \
332 * Restore arb mask register (reenables DMA arbitration). \
334 WRITE_REG32(arb_mask, base + LBA_ARB_MASK); \
340 lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size)
344 u32 arb_mask = 0; /* used by LBA_CFG_SETUP/RESTORE */
345 u32 error_config = 0; /* used by LBA_CFG_SETUP/RESTORE */
346 u32 status_control = 0; /* used by LBA_CFG_SETUP/RESTORE */
348 LBA_CFG_SETUP(d, tok);
349 LBA_CFG_PROBE(d, tok);
350 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
352 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
354 LBA_CFG_ADDR_SETUP(d, tok | reg);
356 case 1: data = (u32) READ_REG8(data_reg + (reg & 3)); break;
357 case 2: data = (u32) READ_REG16(data_reg+ (reg & 2)); break;
358 case 4: data = READ_REG32(data_reg); break;
361 LBA_CFG_RESTORE(d, d->hba.base_addr);
366 static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
368 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
369 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
370 u32 tok = LBA_CFG_TOK(local_bus, devfn);
371 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
373 if ((pos > 255) || (devfn > 255))
376 /* FIXME: B2K/C3600 workaround is always use old method... */
377 /* if (!LBA_SKIP_PROBE(d)) */ {
378 /* original - Generate config cycle on broken elroy
379 with risk we will miss PCI bus errors. */
380 *data = lba_rd_cfg(d, tok, pos, size);
381 DBG_CFG("%s(%x+%2x) -> 0x%x (a)\n", __func__, tok, pos, *data);
385 if (LBA_SKIP_PROBE(d) && !lba_device_present(bus->busn_res.start, devfn, d)) {
386 DBG_CFG("%s(%x+%2x) -> -1 (b)\n", __func__, tok, pos);
387 /* either don't want to look or know device isn't present. */
393 ** Should only get here on fully working LBA rev.
394 ** This is how simple the code should have been.
396 LBA_CFG_ADDR_SETUP(d, tok | pos);
398 case 1: *data = READ_REG8 (data_reg + (pos & 3)); break;
399 case 2: *data = READ_REG16(data_reg + (pos & 2)); break;
400 case 4: *data = READ_REG32(data_reg); break;
402 DBG_CFG("%s(%x+%2x) -> 0x%x (c)\n", __func__, tok, pos, *data);
408 lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size)
412 u32 error_config = 0;
413 u32 status_control = 0;
414 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
416 LBA_CFG_SETUP(d, tok);
417 LBA_CFG_ADDR_SETUP(d, tok | reg);
419 case 1: WRITE_REG8 (data, data_reg + (reg & 3)); break;
420 case 2: WRITE_REG16(data, data_reg + (reg & 2)); break;
421 case 4: WRITE_REG32(data, data_reg); break;
423 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
424 LBA_CFG_RESTORE(d, d->hba.base_addr);
429 * LBA 4.0 config write code implements non-postable semantics
430 * by doing a read of CONFIG ADDR after the write.
433 static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
435 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
436 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
437 u32 tok = LBA_CFG_TOK(local_bus,devfn);
439 if ((pos > 255) || (devfn > 255))
442 if (!LBA_SKIP_PROBE(d)) {
443 /* Original Workaround */
444 lba_wr_cfg(d, tok, pos, (u32) data, size);
445 DBG_CFG("%s(%x+%2x) = 0x%x (a)\n", __func__, tok, pos,data);
449 if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus->busn_res.start, devfn, d))) {
450 DBG_CFG("%s(%x+%2x) = 0x%x (b)\n", __func__, tok, pos,data);
451 return 1; /* New Workaround */
454 DBG_CFG("%s(%x+%2x) = 0x%x (c)\n", __func__, tok, pos, data);
456 /* Basic Algorithm */
457 LBA_CFG_ADDR_SETUP(d, tok | pos);
459 case 1: WRITE_REG8 (data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 3));
461 case 2: WRITE_REG16(data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 2));
463 case 4: WRITE_REG32(data, d->hba.base_addr + LBA_PCI_CFG_DATA);
466 /* flush posted write */
467 lba_t32 = READ_REG32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
472 static struct pci_ops elroy_cfg_ops = {
473 .read = elroy_cfg_read,
474 .write = elroy_cfg_write,
478 * The mercury_cfg_ops are slightly misnamed; they're also used for Elroy
479 * TR4.0 as no additional bugs were found in this areea between Elroy and
483 static int mercury_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
485 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
486 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
487 u32 tok = LBA_CFG_TOK(local_bus, devfn);
488 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
490 if ((pos > 255) || (devfn > 255))
493 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
496 *data = READ_REG8(data_reg + (pos & 3));
499 *data = READ_REG16(data_reg + (pos & 2));
502 *data = READ_REG32(data_reg); break;
506 DBG_CFG("mercury_cfg_read(%x+%2x) -> 0x%x\n", tok, pos, *data);
511 * LBA 4.0 config write code implements non-postable semantics
512 * by doing a read of CONFIG ADDR after the write.
515 static int mercury_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
517 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
518 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
519 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
520 u32 tok = LBA_CFG_TOK(local_bus,devfn);
522 if ((pos > 255) || (devfn > 255))
525 DBG_CFG("%s(%x+%2x) <- 0x%x (c)\n", __func__, tok, pos, data);
527 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
530 WRITE_REG8 (data, data_reg + (pos & 3));
533 WRITE_REG16(data, data_reg + (pos & 2));
536 WRITE_REG32(data, data_reg);
540 /* flush posted write */
541 lba_t32 = READ_U32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
545 static struct pci_ops mercury_cfg_ops = {
546 .read = mercury_cfg_read,
547 .write = mercury_cfg_write,
554 DBG(MODULE_NAME ": lba_bios_init\n");
561 * truncate_pat_collision: Deal with overlaps or outright collisions
562 * between PAT PDC reported ranges.
564 * Broken PA8800 firmware will report lmmio range that
565 * overlaps with CPU HPA. Just truncate the lmmio range.
567 * BEWARE: conflicts with this lmmio range may be an
568 * elmmio range which is pointing down another rope.
570 * FIXME: only deals with one collision per range...theoretically we
571 * could have several. Supporting more than one collision will get messy.
574 truncate_pat_collision(struct resource *root, struct resource *new)
576 unsigned long start = new->start;
577 unsigned long end = new->end;
578 struct resource *tmp = root->child;
580 if (end <= start || start < root->start || !tmp)
583 /* find first overlap */
584 while (tmp && tmp->end < start)
587 /* no entries overlap */
590 /* found one that starts behind the new one
591 ** Don't need to do anything.
593 if (tmp->start >= end) return 0;
595 if (tmp->start <= start) {
596 /* "front" of new one overlaps */
597 new->start = tmp->end + 1;
599 if (tmp->end >= end) {
600 /* AACCKK! totally overlaps! drop this range. */
605 if (tmp->end < end ) {
606 /* "end" of new one overlaps */
607 new->end = tmp->start - 1;
610 printk(KERN_WARNING "LBA: Truncating lmmio_space [%lx/%lx] "
613 (long)new->start, (long)new->end );
615 return 0; /* truncation successful */
619 * extend_lmmio_len: extend lmmio range to maximum length
621 * This is needed at least on C8000 systems to get the ATI FireGL card
622 * working. On other systems we will currently not extend the lmmio space.
625 extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
627 struct resource *tmp;
629 /* exit if not a C8000 */
630 if (boot_cpu_data.cpu_type < mako)
633 pr_debug("LMMIO mismatch: PAT length = 0x%lx, MASK register = 0x%lx\n",
634 end - start, lba_len);
636 lba_len = min(lba_len+1, 256UL*1024*1024); /* limit to 256 MB */
638 pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - original\n", start, end);
642 if (end < start) /* fix overflow */
645 pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - current\n", start, end);
648 for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
649 pr_debug("LBA: testing %pR\n", tmp);
650 if (tmp->start == start)
651 continue; /* ignore ourself */
652 if (tmp->end < start)
654 if (tmp->start > end)
656 if (end >= tmp->start)
657 end = tmp->start - 1;
660 pr_info("LBA: lmmio_space [0x%lx-0x%lx] - new\n", start, end);
667 #define truncate_pat_collision(r,n) (0)
670 static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
675 for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
676 r = &dev->resource[idx];
679 if (r->parent) /* Already allocated */
681 if (!r->start || pci_claim_bridge_resource(dev, idx) < 0) {
683 * Something is wrong with the region.
684 * Invalidate the resource to prevent
685 * child resource allocations in this
688 r->start = r->end = 0;
694 static void pcibios_allocate_bus_resources(struct pci_bus *bus)
696 struct pci_bus *child;
698 /* Depth-First Search on bus tree */
700 pcibios_allocate_bridge_resources(bus->self);
701 list_for_each_entry(child, &bus->children, node)
702 pcibios_allocate_bus_resources(child);
707 ** The algorithm is generic code.
708 ** But it needs to access local data structures to get the IRQ base.
709 ** Could make this a "pci_fixup_irq(bus, region)" but not sure
712 ** Called by do_pci_scan_bus() immediately after each PCI bus is walked.
713 ** Resources aren't allocated until recursive buswalk below HBA is completed.
716 lba_fixup_bus(struct pci_bus *bus)
722 struct lba_device *ldev = LBA_DEV(parisc_walk_tree(bus->bridge));
724 DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n",
725 bus, (int)bus->busn_res.start, bus->bridge->platform_data);
728 ** Properly Setup MMIO resources for this bus.
729 ** pci_alloc_primary_bus() mangles this.
733 pci_read_bridge_bases(bus);
735 /* check and allocate bridge resources */
736 pcibios_allocate_bus_resources(bus);
738 /* Host-PCI Bridge */
741 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
742 ldev->hba.io_space.name,
743 ldev->hba.io_space.start, ldev->hba.io_space.end,
744 ldev->hba.io_space.flags);
745 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
746 ldev->hba.lmmio_space.name,
747 ldev->hba.lmmio_space.start, ldev->hba.lmmio_space.end,
748 ldev->hba.lmmio_space.flags);
750 err = request_resource(&ioport_resource, &(ldev->hba.io_space));
752 lba_dump_res(&ioport_resource, 2);
756 if (ldev->hba.elmmio_space.flags) {
757 err = request_resource(&iomem_resource,
758 &(ldev->hba.elmmio_space));
761 printk("FAILED: lba_fixup_bus() request for "
762 "elmmio_space [%lx/%lx]\n",
763 (long)ldev->hba.elmmio_space.start,
764 (long)ldev->hba.elmmio_space.end);
766 /* lba_dump_res(&iomem_resource, 2); */
771 if (ldev->hba.lmmio_space.flags) {
772 err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space));
774 printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
775 "lmmio_space [%lx/%lx]\n",
776 (long)ldev->hba.lmmio_space.start,
777 (long)ldev->hba.lmmio_space.end);
782 /* GMMIO is distributed range. Every LBA/Rope gets part it. */
783 if (ldev->hba.gmmio_space.flags) {
784 err = request_resource(&iomem_resource, &(ldev->hba.gmmio_space));
786 printk("FAILED: lba_fixup_bus() request for "
787 "gmmio_space [%lx/%lx]\n",
788 (long)ldev->hba.gmmio_space.start,
789 (long)ldev->hba.gmmio_space.end);
790 lba_dump_res(&iomem_resource, 2);
798 list_for_each_entry(dev, &bus->devices, bus_list) {
801 DBG("lba_fixup_bus() %s\n", pci_name(dev));
803 /* Virtualize Device/Bridge Resources. */
804 for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
805 struct resource *res = &dev->resource[i];
807 /* If resource not allocated - skip it */
812 ** FIXME: this will result in whinging for devices
813 ** that share expansion ROMs (think quad tulip), but
816 pci_claim_resource(dev, i);
821 ** If one device does not support FBB transfers,
822 ** No one on the bus can be allowed to use them.
824 (void) pci_read_config_word(dev, PCI_STATUS, &status);
825 bus->bridge_ctl &= ~(status & PCI_STATUS_FAST_BACK);
829 ** P2PB's have no IRQs. ignore them.
831 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
832 pcibios_init_bridge(dev);
836 /* Adjust INTERRUPT_LINE for this dev */
837 iosapic_fixup_irq(ldev->iosapic_obj, dev);
841 /* FIXME/REVISIT - finish figuring out to set FBB on both
842 ** pci_setup_bridge() clobbers PCI_BRIDGE_CONTROL.
843 ** Can't fixup here anyway....garr...
849 (void) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control);
850 (void) pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, control | PCI_STATUS_FAST_BACK);
855 fbb_enable = PCI_COMMAND_FAST_BACK;
858 /* Lastly enable FBB/PERR/SERR on all devices too */
859 list_for_each_entry(dev, &bus->devices, bus_list) {
860 (void) pci_read_config_word(dev, PCI_COMMAND, &status);
861 status |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR | fbb_enable;
862 (void) pci_write_config_word(dev, PCI_COMMAND, status);
868 static struct pci_bios_ops lba_bios_ops = {
869 .init = lba_bios_init,
870 .fixup_bus = lba_fixup_bus,
876 /*******************************************************
878 ** LBA Sprockets "I/O Port" Space Accessor Functions
880 ** This set of accessor functions is intended for use with
881 ** "legacy firmware" (ie Sprockets on Allegro/Forte boxes).
883 ** Many PCI devices don't require use of I/O port space (eg Tulip,
884 ** NCR720) since they export the same registers to both MMIO and
885 ** I/O port space. In general I/O port space is slower than
886 ** MMIO since drivers are designed so PIO writes can be posted.
888 ********************************************************/
890 #define LBA_PORT_IN(size, mask) \
891 static u##size lba_astro_in##size (struct pci_hba_data *d, u16 addr) \
894 t = READ_REG##size(astro_iop_base + addr); \
895 DBG_PORT(" 0x%x\n", t); \
906 ** BUG X4107: Ordering broken - DMA RD return can bypass PIO WR
908 ** Fixed in Elroy 2.2. The READ_U32(..., LBA_FUNC_ID) below is
909 ** guarantee non-postable completion semantics - not avoid X4107.
910 ** The READ_U32 only guarantees the write data gets to elroy but
911 ** out to the PCI bus. We can't read stuff from I/O port space
912 ** since we don't know what has side-effects. Attempting to read
913 ** from configuration space would be suicidal given the number of
914 ** bugs in that elroy functionality.
917 ** DMA read results can improperly pass PIO writes (X4107). The
918 ** result of this bug is that if a processor modifies a location in
919 ** memory after having issued PIO writes, the PIO writes are not
920 ** guaranteed to be completed before a PCI device is allowed to see
921 ** the modified data in a DMA read.
923 ** Note that IKE bug X3719 in TR1 IKEs will result in the same
927 ** The workaround for this bug is to always follow a PIO write with
928 ** a PIO read to the same bus before starting DMA on that PCI bus.
931 #define LBA_PORT_OUT(size, mask) \
932 static void lba_astro_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
934 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, d, addr, val); \
935 WRITE_REG##size(val, astro_iop_base + addr); \
936 if (LBA_DEV(d)->hw_rev < 3) \
937 lba_t32 = READ_U32(d->base_addr + LBA_FUNC_ID); \
945 static struct pci_port_ops lba_astro_port_ops = {
946 .inb = lba_astro_in8,
947 .inw = lba_astro_in16,
948 .inl = lba_astro_in32,
949 .outb = lba_astro_out8,
950 .outw = lba_astro_out16,
951 .outl = lba_astro_out32
956 #define PIOP_TO_GMMIO(lba, addr) \
957 ((lba)->iop_base + (((addr)&0xFFFC)<<10) + ((addr)&3))
959 /*******************************************************
961 ** LBA PAT "I/O Port" Space Accessor Functions
963 ** This set of accessor functions is intended for use with
964 ** "PAT PDC" firmware (ie Prelude/Rhapsody/Piranha boxes).
966 ** This uses the PIOP space located in the first 64MB of GMMIO.
967 ** Each rope gets a full 64*KB* (ie 4 bytes per page) this way.
968 ** bits 1:0 stay the same. bits 15:2 become 25:12.
969 ** Then add the base and we can generate an I/O Port cycle.
970 ********************************************************/
972 #define LBA_PORT_IN(size, mask) \
973 static u##size lba_pat_in##size (struct pci_hba_data *l, u16 addr) \
976 DBG_PORT("%s(0x%p, 0x%x) ->", __func__, l, addr); \
977 t = READ_REG##size(PIOP_TO_GMMIO(LBA_DEV(l), addr)); \
978 DBG_PORT(" 0x%x\n", t); \
988 #define LBA_PORT_OUT(size, mask) \
989 static void lba_pat_out##size (struct pci_hba_data *l, u16 addr, u##size val) \
991 void __iomem *where = PIOP_TO_GMMIO(LBA_DEV(l), addr); \
992 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, l, addr, val); \
993 WRITE_REG##size(val, where); \
994 /* flush the I/O down to the elroy at least */ \
995 lba_t32 = READ_U32(l->base_addr + LBA_FUNC_ID); \
1003 static struct pci_port_ops lba_pat_port_ops = {
1005 .inw = lba_pat_in16,
1006 .inl = lba_pat_in32,
1007 .outb = lba_pat_out8,
1008 .outw = lba_pat_out16,
1009 .outl = lba_pat_out32
1015 ** make range information from PDC available to PCI subsystem.
1016 ** We make the PDC call here in order to get the PCI bus range
1017 ** numbers. The rest will get forwarded in pcibios_fixup_bus().
1018 ** We don't have a struct pci_bus assigned to us yet.
1021 lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1023 unsigned long bytecnt;
1025 long status; /* PDC return status */
1027 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; /* PA_VIEW */
1028 pdc_pat_cell_mod_maddr_block_t *io_pdc_cell; /* IO_VIEW */
1031 pa_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
1035 io_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
1041 /* return cell module (IO view) */
1042 status = pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1043 PA_VIEW, pa_pdc_cell);
1044 pa_count = pa_pdc_cell->mod[1];
1046 status |= pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1047 IO_VIEW, io_pdc_cell);
1048 io_count = io_pdc_cell->mod[1];
1050 /* We've already done this once for device discovery...*/
1051 if (status != PDC_OK) {
1052 panic("pdc_pat_cell_module() call failed for LBA!\n");
1055 if (PAT_GET_ENTITY(pa_pdc_cell->mod_info) != PAT_ENTITY_LBA) {
1056 panic("pdc_pat_cell_module() entity returned != PAT_ENTITY_LBA!\n");
1060 ** Inspect the resources PAT tells us about
1062 for (i = 0; i < pa_count; i++) {
1065 unsigned long start;
1066 unsigned long end; /* aka finish */
1070 p = (void *) &(pa_pdc_cell->mod[2+i*3]);
1071 io = (void *) &(io_pdc_cell->mod[2+i*3]);
1073 /* Convert the PAT range data to PCI "struct resource" */
1074 switch(p->type & 0xff) {
1076 lba_dev->hba.bus_num.start = p->start;
1077 lba_dev->hba.bus_num.end = p->end;
1078 lba_dev->hba.bus_num.flags = IORESOURCE_BUS;
1082 /* used to fix up pre-initialized MEM BARs */
1083 if (!lba_dev->hba.lmmio_space.flags) {
1084 unsigned long lba_len;
1086 lba_len = ~READ_REG32(lba_dev->hba.base_addr
1088 if ((p->end - p->start) != lba_len)
1089 p->end = extend_lmmio_len(p->start,
1092 sprintf(lba_dev->hba.lmmio_name,
1094 (int)lba_dev->hba.bus_num.start);
1095 lba_dev->hba.lmmio_space_offset = p->start -
1097 r = &lba_dev->hba.lmmio_space;
1098 r->name = lba_dev->hba.lmmio_name;
1099 } else if (!lba_dev->hba.elmmio_space.flags) {
1100 sprintf(lba_dev->hba.elmmio_name,
1102 (int)lba_dev->hba.bus_num.start);
1103 r = &lba_dev->hba.elmmio_space;
1104 r->name = lba_dev->hba.elmmio_name;
1106 printk(KERN_WARNING MODULE_NAME
1107 " only supports 2 LMMIO resources!\n");
1111 r->start = p->start;
1113 r->flags = IORESOURCE_MEM;
1114 r->parent = r->sibling = r->child = NULL;
1118 /* MMIO space > 4GB phys addr; for 64-bit BAR */
1119 sprintf(lba_dev->hba.gmmio_name, "PCI%02x GMMIO",
1120 (int)lba_dev->hba.bus_num.start);
1121 r = &lba_dev->hba.gmmio_space;
1122 r->name = lba_dev->hba.gmmio_name;
1123 r->start = p->start;
1125 r->flags = IORESOURCE_MEM;
1126 r->parent = r->sibling = r->child = NULL;
1130 printk(KERN_WARNING MODULE_NAME
1131 " range[%d] : ignoring NPIOP (0x%lx)\n",
1137 ** Postable I/O port space is per PCI host adapter.
1138 ** base of 64MB PIOP region
1140 lba_dev->iop_base = ioremap_nocache(p->start, 64 * 1024 * 1024);
1142 sprintf(lba_dev->hba.io_name, "PCI%02x Ports",
1143 (int)lba_dev->hba.bus_num.start);
1144 r = &lba_dev->hba.io_space;
1145 r->name = lba_dev->hba.io_name;
1146 r->start = HBA_PORT_BASE(lba_dev->hba.hba_num);
1147 r->end = r->start + HBA_PORT_SPACE_SIZE - 1;
1148 r->flags = IORESOURCE_IO;
1149 r->parent = r->sibling = r->child = NULL;
1153 printk(KERN_WARNING MODULE_NAME
1154 " range[%d] : unknown pat range type (0x%lx)\n",
1164 /* keep compiler from complaining about missing declarations */
1165 #define lba_pat_port_ops lba_astro_port_ops
1166 #define lba_pat_resources(pa_dev, lba_dev)
1167 #endif /* CONFIG_64BIT */
1170 extern void sba_distributed_lmmio(struct parisc_device *, struct resource *);
1171 extern void sba_directed_lmmio(struct parisc_device *, struct resource *);
1175 lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1180 lba_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
1183 ** With "legacy" firmware, the lowest byte of FW_SCRATCH
1184 ** represents bus->secondary and the second byte represents
1185 ** bus->subsidiary (i.e. highest PPB programmed by firmware).
1186 ** PCI bus walk *should* end up with the same result.
1187 ** FIXME: But we don't have sanity checks in PCI or LBA.
1189 lba_num = READ_REG32(lba_dev->hba.base_addr + LBA_FW_SCRATCH);
1190 r = &(lba_dev->hba.bus_num);
1191 r->name = "LBA PCI Busses";
1192 r->start = lba_num & 0xff;
1193 r->end = (lba_num>>8) & 0xff;
1194 r->flags = IORESOURCE_BUS;
1196 /* Set up local PCI Bus resources - we don't need them for
1197 ** Legacy boxes but it's nice to see in /proc/iomem.
1199 r = &(lba_dev->hba.lmmio_space);
1200 sprintf(lba_dev->hba.lmmio_name, "PCI%02x LMMIO",
1201 (int)lba_dev->hba.bus_num.start);
1202 r->name = lba_dev->hba.lmmio_name;
1205 /* We want the CPU -> IO routing of addresses.
1206 * The SBA BASE/MASK registers control CPU -> IO routing.
1207 * Ask SBA what is routed to this rope/LBA.
1209 sba_distributed_lmmio(pa_dev, r);
1212 * The LBA BASE/MASK registers control IO -> System routing.
1214 * The following code works but doesn't get us what we want.
1215 * Well, only because firmware (v5.0) on C3000 doesn't program
1216 * the LBA BASE/MASE registers to be the exact inverse of
1217 * the corresponding SBA registers. Other Astro/Pluto
1218 * based platform firmware may do it right.
1220 * Should someone want to mess with MSI, they may need to
1221 * reprogram LBA BASE/MASK registers. Thus preserve the code
1222 * below until MSI is known to work on C3000/A500/N4000/RP3440.
1224 * Using the code below, /proc/iomem shows:
1226 * f0000000-f0ffffff : PCI00 LMMIO
1227 * f05d0000-f05d0000 : lcd_data
1228 * f05d0008-f05d0008 : lcd_cmd
1229 * f1000000-f1ffffff : PCI01 LMMIO
1230 * f4000000-f4ffffff : PCI02 LMMIO
1231 * f4000000-f4001fff : sym53c8xx
1232 * f4002000-f4003fff : sym53c8xx
1233 * f4004000-f40043ff : sym53c8xx
1234 * f4005000-f40053ff : sym53c8xx
1235 * f4007000-f4007fff : ohci_hcd
1236 * f4008000-f40083ff : tulip
1237 * f6000000-f6ffffff : PCI03 LMMIO
1238 * f8000000-fbffffff : PCI00 ELMMIO
1239 * fa100000-fa4fffff : stifb mmio
1240 * fb000000-fb1fffff : stifb fb
1242 * But everything listed under PCI02 actually lives under PCI00.
1243 * This is clearly wrong.
1245 * Asking SBA how things are routed tells the correct story:
1246 * LMMIO_BASE/MASK/ROUTE f4000001 fc000000 00000000
1247 * DIR0_BASE/MASK/ROUTE fa000001 fe000000 00000006
1248 * DIR1_BASE/MASK/ROUTE f9000001 ff000000 00000004
1249 * DIR2_BASE/MASK/ROUTE f0000000 fc000000 00000000
1250 * DIR3_BASE/MASK/ROUTE f0000000 fc000000 00000000
1252 * Which looks like this in /proc/iomem:
1253 * f4000000-f47fffff : PCI00 LMMIO
1254 * f4000000-f4001fff : sym53c8xx
1255 * ...[deteled core devices - same as above]...
1256 * f4008000-f40083ff : tulip
1257 * f4800000-f4ffffff : PCI01 LMMIO
1258 * f6000000-f67fffff : PCI02 LMMIO
1259 * f7000000-f77fffff : PCI03 LMMIO
1260 * f9000000-f9ffffff : PCI02 ELMMIO
1261 * fa000000-fbffffff : PCI03 ELMMIO
1262 * fa100000-fa4fffff : stifb mmio
1263 * fb000000-fb1fffff : stifb fb
1265 * ie all Built-in core are under now correctly under PCI00.
1266 * The "PCI02 ELMMIO" directed range is for:
1267 * +-[02]---03.0 3Dfx Interactive, Inc. Voodoo 2
1271 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_BASE);
1273 unsigned long rsize;
1275 r->flags = IORESOURCE_MEM;
1276 /* mmio_mask also clears Enable bit */
1277 r->start &= mmio_mask;
1278 r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start);
1279 rsize = ~ READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_MASK);
1282 ** Each rope only gets part of the distributed range.
1283 ** Adjust "window" for this rope.
1285 rsize /= ROPES_PER_IOC;
1286 r->start += (rsize + 1) * LBA_NUM(pa_dev->hpa.start);
1287 r->end = r->start + rsize;
1289 r->end = r->start = 0; /* Not enabled. */
1294 ** "Directed" ranges are used when the "distributed range" isn't
1295 ** sufficient for all devices below a given LBA. Typically devices
1296 ** like graphics cards or X25 may need a directed range when the
1297 ** bus has multiple slots (ie multiple devices) or the device
1298 ** needs more than the typical 4 or 8MB a distributed range offers.
1300 ** The main reason for ignoring it now frigging complications.
1301 ** Directed ranges may overlap (and have precedence) over
1302 ** distributed ranges. Or a distributed range assigned to a unused
1303 ** rope may be used by a directed range on a different rope.
1304 ** Support for graphics devices may require fixing this
1305 ** since they may be assigned a directed range which overlaps
1306 ** an existing (but unused portion of) distributed range.
1308 r = &(lba_dev->hba.elmmio_space);
1309 sprintf(lba_dev->hba.elmmio_name, "PCI%02x ELMMIO",
1310 (int)lba_dev->hba.bus_num.start);
1311 r->name = lba_dev->hba.elmmio_name;
1314 /* See comment which precedes call to sba_directed_lmmio() */
1315 sba_directed_lmmio(pa_dev, r);
1317 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_BASE);
1320 unsigned long rsize;
1321 r->flags = IORESOURCE_MEM;
1322 /* mmio_mask also clears Enable bit */
1323 r->start &= mmio_mask;
1324 r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start);
1325 rsize = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_MASK);
1326 r->end = r->start + ~rsize;
1330 r = &(lba_dev->hba.io_space);
1331 sprintf(lba_dev->hba.io_name, "PCI%02x Ports",
1332 (int)lba_dev->hba.bus_num.start);
1333 r->name = lba_dev->hba.io_name;
1334 r->flags = IORESOURCE_IO;
1335 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_IOS_BASE) & ~1L;
1336 r->end = r->start + (READ_REG32(lba_dev->hba.base_addr + LBA_IOS_MASK) ^ (HBA_PORT_SPACE_SIZE - 1));
1338 /* Virtualize the I/O Port space ranges */
1339 lba_num = HBA_PORT_BASE(lba_dev->hba.hba_num);
1340 r->start |= lba_num;
1345 /**************************************************************************
1347 ** LBA initialization code (HW and SW)
1349 ** o identify LBA chip itself
1350 ** o initialize LBA chip modes (HardFail)
1351 ** o FIXME: initialize DMA hints for reasonable defaults
1352 ** o enable configuration functions
1353 ** o call pci_register_ops() to discover devs (fixup/fixup_bus get invoked)
1355 **************************************************************************/
1358 lba_hw_init(struct lba_device *d)
1361 u32 bus_reset; /* PDC_PAT_BUG */
1364 printk(KERN_DEBUG "LBA %lx STAT_CTL %Lx ERROR_CFG %Lx STATUS %Lx DMA_CTL %Lx\n",
1366 READ_REG64(d->hba.base_addr + LBA_STAT_CTL),
1367 READ_REG64(d->hba.base_addr + LBA_ERROR_CONFIG),
1368 READ_REG64(d->hba.base_addr + LBA_ERROR_STATUS),
1369 READ_REG64(d->hba.base_addr + LBA_DMA_CTL) );
1370 printk(KERN_DEBUG " ARB mask %Lx pri %Lx mode %Lx mtlt %Lx\n",
1371 READ_REG64(d->hba.base_addr + LBA_ARB_MASK),
1372 READ_REG64(d->hba.base_addr + LBA_ARB_PRI),
1373 READ_REG64(d->hba.base_addr + LBA_ARB_MODE),
1374 READ_REG64(d->hba.base_addr + LBA_ARB_MTLT) );
1375 printk(KERN_DEBUG " HINT cfg 0x%Lx\n",
1376 READ_REG64(d->hba.base_addr + LBA_HINT_CFG));
1377 printk(KERN_DEBUG " HINT reg ");
1379 for (i=LBA_HINT_BASE; i< (14*8 + LBA_HINT_BASE); i+=8)
1380 printk(" %Lx", READ_REG64(d->hba.base_addr + i));
1383 #endif /* DEBUG_LBA_PAT */
1387 * FIXME add support for PDC_PAT_IO "Get slot status" - OLAR support
1388 * Only N-Class and up can really make use of Get slot status.
1389 * maybe L-class too but I've never played with it there.
1393 /* PDC_PAT_BUG: exhibited in rev 40.48 on L2000 */
1394 bus_reset = READ_REG32(d->hba.base_addr + LBA_STAT_CTL + 4) & 1;
1396 printk(KERN_DEBUG "NOTICE: PCI bus reset still asserted! (clearing)\n");
1399 stat = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG);
1400 if (stat & LBA_SMART_MODE) {
1401 printk(KERN_DEBUG "NOTICE: LBA in SMART mode! (cleared)\n");
1402 stat &= ~LBA_SMART_MODE;
1403 WRITE_REG32(stat, d->hba.base_addr + LBA_ERROR_CONFIG);
1406 /* Set HF mode as the default (vs. -1 mode). */
1407 stat = READ_REG32(d->hba.base_addr + LBA_STAT_CTL);
1408 WRITE_REG32(stat | HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
1411 ** Writing a zero to STAT_CTL.rf (bit 0) will clear reset signal
1412 ** if it's not already set. If we just cleared the PCI Bus Reset
1413 ** signal, wait a bit for the PCI devices to recover and setup.
1416 mdelay(pci_post_reset_delay);
1418 if (0 == READ_REG32(d->hba.base_addr + LBA_ARB_MASK)) {
1420 ** PDC_PAT_BUG: PDC rev 40.48 on L2000.
1421 ** B2000/C3600/J6000 also have this problem?
1423 ** Elroys with hot pluggable slots don't get configured
1424 ** correctly if the slot is empty. ARB_MASK is set to 0
1425 ** and we can't master transactions on the bus if it's
1426 ** not at least one. 0x3 enables elroy and first slot.
1428 printk(KERN_DEBUG "NOTICE: Enabling PCI Arbitration\n");
1429 WRITE_REG32(0x3, d->hba.base_addr + LBA_ARB_MASK);
1433 ** FIXME: Hint registers are programmed with default hint
1434 ** values by firmware. Hints should be sane even if we
1435 ** can't reprogram them the way drivers want.
1441 * Unfortunately, when firmware numbers busses, it doesn't take into account
1442 * Cardbus bridges. So we have to renumber the busses to suit ourselves.
1443 * Elroy/Mercury don't actually know what bus number they're attached to;
1444 * we use bus 0 to indicate the directly attached bus and any other bus
1445 * number will be taken care of by the PCI-PCI bridge.
1447 static unsigned int lba_next_bus = 0;
1450 * Determine if lba should claim this chip (return 0) or not (return 1).
1451 * If so, initialize the chip and tell other partners in crime they
1455 lba_driver_probe(struct parisc_device *dev)
1457 struct lba_device *lba_dev;
1458 LIST_HEAD(resources);
1459 struct pci_bus *lba_bus;
1460 struct pci_ops *cfg_ops;
1464 void __iomem *addr = ioremap_nocache(dev->hpa.start, 4096);
1467 /* Read HW Rev First */
1468 func_class = READ_REG32(addr + LBA_FCLASS);
1470 if (IS_ELROY(dev)) {
1472 switch (func_class) {
1473 case 0: version = "TR1.0"; break;
1474 case 1: version = "TR2.0"; break;
1475 case 2: version = "TR2.1"; break;
1476 case 3: version = "TR2.2"; break;
1477 case 4: version = "TR3.0"; break;
1478 case 5: version = "TR4.0"; break;
1479 default: version = "TR4+";
1482 printk(KERN_INFO "Elroy version %s (0x%x) found at 0x%lx\n",
1483 version, func_class & 0xf, (long)dev->hpa.start);
1485 if (func_class < 2) {
1486 printk(KERN_WARNING "Can't support LBA older than "
1487 "TR2.1 - continuing under adversity.\n");
1491 /* Elroy TR4.0 should work with simple algorithm.
1492 But it doesn't. Still missing something. *sigh*
1494 if (func_class > 4) {
1495 cfg_ops = &mercury_cfg_ops;
1499 cfg_ops = &elroy_cfg_ops;
1502 } else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) {
1506 major = func_class >> 4, minor = func_class & 0xf;
1508 /* We could use one printk for both Elroy and Mercury,
1509 * but for the mask for func_class.
1511 printk(KERN_INFO "%s version TR%d.%d (0x%x) found at 0x%lx\n",
1512 IS_MERCURY(dev) ? "Mercury" : "Quicksilver", major,
1513 minor, func_class, (long)dev->hpa.start);
1515 cfg_ops = &mercury_cfg_ops;
1517 printk(KERN_ERR "Unknown LBA found at 0x%lx\n",
1518 (long)dev->hpa.start);
1522 /* Tell I/O SAPIC driver we have a IRQ handler/region. */
1523 tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE);
1525 /* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't
1526 ** have an IRT entry will get NULL back from iosapic code.
1529 lba_dev = kzalloc(sizeof(struct lba_device), GFP_KERNEL);
1531 printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n");
1536 /* ---------- First : initialize data we already have --------- */
1538 lba_dev->hw_rev = func_class;
1539 lba_dev->hba.base_addr = addr;
1540 lba_dev->hba.dev = dev;
1541 lba_dev->iosapic_obj = tmp_obj; /* save interrupt handle */
1542 lba_dev->hba.iommu = sba_get_iommu(dev); /* get iommu data */
1543 parisc_set_drvdata(dev, lba_dev);
1545 /* ------------ Second : initialize common stuff ---------- */
1546 pci_bios = &lba_bios_ops;
1547 pcibios_register_hba(HBA_DATA(lba_dev));
1548 spin_lock_init(&lba_dev->lba_lock);
1550 if (lba_hw_init(lba_dev))
1553 /* ---------- Third : setup I/O Port and MMIO resources --------- */
1556 /* PDC PAT firmware uses PIOP region of GMMIO space. */
1557 pci_port = &lba_pat_port_ops;
1558 /* Go ask PDC PAT what resources this LBA has */
1559 lba_pat_resources(dev, lba_dev);
1561 if (!astro_iop_base) {
1562 /* Sprockets PDC uses NPIOP region */
1563 astro_iop_base = ioremap_nocache(LBA_PORT_BASE, 64 * 1024);
1564 pci_port = &lba_astro_port_ops;
1567 /* Poke the chip a bit for /proc output */
1568 lba_legacy_resources(dev, lba_dev);
1571 if (lba_dev->hba.bus_num.start < lba_next_bus)
1572 lba_dev->hba.bus_num.start = lba_next_bus;
1574 /* Overlaps with elmmio can (and should) fail here.
1575 * We will prune (or ignore) the distributed range.
1577 * FIXME: SBA code should register all elmmio ranges first.
1578 * that would take care of elmmio ranges routed
1579 * to a different rope (already discovered) from
1580 * getting registered *after* LBA code has already
1581 * registered it's distributed lmmio range.
1583 if (truncate_pat_collision(&iomem_resource,
1584 &(lba_dev->hba.lmmio_space))) {
1585 printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
1586 (long)lba_dev->hba.lmmio_space.start,
1587 (long)lba_dev->hba.lmmio_space.end);
1588 lba_dev->hba.lmmio_space.flags = 0;
1591 pci_add_resource_offset(&resources, &lba_dev->hba.io_space,
1592 HBA_PORT_BASE(lba_dev->hba.hba_num));
1593 if (lba_dev->hba.elmmio_space.flags)
1594 pci_add_resource_offset(&resources, &lba_dev->hba.elmmio_space,
1595 lba_dev->hba.lmmio_space_offset);
1596 if (lba_dev->hba.lmmio_space.flags)
1597 pci_add_resource_offset(&resources, &lba_dev->hba.lmmio_space,
1598 lba_dev->hba.lmmio_space_offset);
1599 if (lba_dev->hba.gmmio_space.flags) {
1600 /* Not registering GMMIO space - according to docs it's not
1601 * even used on HP-UX. */
1602 /* pci_add_resource(&resources, &lba_dev->hba.gmmio_space); */
1605 pci_add_resource(&resources, &lba_dev->hba.bus_num);
1607 dev->dev.platform_data = lba_dev;
1608 lba_bus = lba_dev->hba.hba_bus =
1609 pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
1610 cfg_ops, NULL, &resources);
1612 pci_free_resource_list(&resources);
1616 max = pci_scan_child_bus(lba_bus);
1618 /* This is in lieu of calling pci_assign_unassigned_resources() */
1620 /* assign resources to un-initialized devices */
1622 DBG_PAT("LBA pci_bus_size_bridges()\n");
1623 pci_bus_size_bridges(lba_bus);
1625 DBG_PAT("LBA pci_bus_assign_resources()\n");
1626 pci_bus_assign_resources(lba_bus);
1628 #ifdef DEBUG_LBA_PAT
1629 DBG_PAT("\nLBA PIOP resource tree\n");
1630 lba_dump_res(&lba_dev->hba.io_space, 2);
1631 DBG_PAT("\nLBA LMMIO resource tree\n");
1632 lba_dump_res(&lba_dev->hba.lmmio_space, 2);
1637 ** Once PCI register ops has walked the bus, access to config
1638 ** space is restricted. Avoids master aborts on config cycles.
1639 ** Early LBA revs go fatal on *any* master abort.
1641 if (cfg_ops == &elroy_cfg_ops) {
1642 lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
1645 lba_next_bus = max + 1;
1646 pci_bus_add_devices(lba_bus);
1648 /* Whew! Finally done! Tell services we got this one covered. */
1652 static const struct parisc_device_id lba_tbl[] __initconst = {
1653 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, ELROY_HVERS, 0xa },
1654 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, MERCURY_HVERS, 0xa },
1655 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, QUICKSILVER_HVERS, 0xa },
1659 static struct parisc_driver lba_driver __refdata = {
1660 .name = MODULE_NAME,
1661 .id_table = lba_tbl,
1662 .probe = lba_driver_probe,
1666 ** One time initialization to let the world know the LBA was found.
1667 ** Must be called exactly once before pci_init().
1669 void __init lba_init(void)
1671 register_parisc_driver(&lba_driver);
1675 ** Initialize the IBASE/IMASK registers for LBA (Elroy).
1676 ** Only called from sba_iommu.c in order to route ranges (MMIO vs DMA).
1677 ** sba_iommu is responsible for locking (none needed at init time).
1679 void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask)
1681 void __iomem * base_addr = ioremap_nocache(lba->hpa.start, 4096);
1683 imask <<= 2; /* adjust for hints - 2 more bits */
1685 /* Make sure we aren't trying to set bits that aren't writeable. */
1686 WARN_ON((ibase & 0x001fffff) != 0);
1687 WARN_ON((imask & 0x001fffff) != 0);
1689 DBG("%s() ibase 0x%x imask 0x%x\n", __func__, ibase, imask);
1690 WRITE_REG32( imask, base_addr + LBA_IMASK);
1691 WRITE_REG32( ibase, base_addr + LBA_IBASE);