4 ** (c) Copyright 1999 Red Hat Software
5 ** (c) Copyright 1999 SuSE GmbH
6 ** (c) Copyright 1999,2000 Hewlett-Packard Company
7 ** (c) Copyright 2000 Grant Grundler
8 ** (c) Copyright 2006 Helge Deller
10 ** This program is free software; you can redistribute it and/or modify
11 ** it under the terms of the GNU General Public License as published by
12 ** the Free Software Foundation; either version 2 of the License, or
13 ** (at your option) any later version.
15 ** This module provides access to Dino PCI bus (config/IOport spaces)
16 ** and helps manage Dino IRQ lines.
18 ** Dino interrupt handling is a bit complicated.
19 ** Dino always writes to the broadcast EIR via irr0 for now.
20 ** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!)
21 ** Only one processor interrupt is used for the 11 IRQ line
24 ** The different between Built-in Dino and Card-Mode
25 ** dino is in chip initialization and pci device initialization.
27 ** Linux drivers can only use Card-Mode Dino if pci devices I/O port
28 ** BARs are configured and used by the driver. Programming MMIO address
29 ** requires substantial knowledge of available Host I/O address ranges
30 ** is currently not supported. Port/Config accessor functions are the
31 ** same. "BIOS" differences are handled within the existing routines.
35 ** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr)
36 ** - added support for the integrated RS232.
40 ** TODO: create a virtual address for each Dino HPA.
41 ** GSC code might be able to do this since IODC data tells us
42 ** how many pages are used. PCI subsystem could (must?) do this
43 ** for PCI drivers devices which implement/use MMIO registers.
46 #include <linux/delay.h>
47 #include <linux/types.h>
48 #include <linux/kernel.h>
49 #include <linux/pci.h>
50 #include <linux/init.h>
51 #include <linux/ioport.h>
52 #include <linux/slab.h>
53 #include <linux/interrupt.h> /* for struct irqaction */
54 #include <linux/spinlock.h> /* for spinlock_t and prototypes */
59 #include <asm/hardware.h>
66 #define DBG(x...) printk(x)
72 ** Config accessor functions only pass in the 8-bit bus number
73 ** and not the 8-bit "PCI Segment" number. Each Dino will be
74 ** assigned a PCI bus number based on "when" it's discovered.
76 ** The "secondary" bus number is set to this before calling
77 ** pci_scan_bus(). If any PPB's are present, the scan will
78 ** discover them and update the "secondary" and "subordinate"
79 ** fields in Dino's pci_bus structure.
81 ** Changes in the configuration *will* result in a different
82 ** bus number for each dino.
85 #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA)
86 #define is_cujo(id) ((id)->hversion == 0x682)
88 #define DINO_IAR0 0x004
89 #define DINO_IODC_ADDR 0x008
90 #define DINO_IODC_DATA_0 0x008
91 #define DINO_IODC_DATA_1 0x008
92 #define DINO_IRR0 0x00C
93 #define DINO_IAR1 0x010
94 #define DINO_IRR1 0x014
95 #define DINO_IMR 0x018
96 #define DINO_IPR 0x01C
97 #define DINO_TOC_ADDR 0x020
98 #define DINO_ICR 0x024
99 #define DINO_ILR 0x028
100 #define DINO_IO_COMMAND 0x030
101 #define DINO_IO_STATUS 0x034
102 #define DINO_IO_CONTROL 0x038
103 #define DINO_IO_GSC_ERR_RESP 0x040
104 #define DINO_IO_ERR_INFO 0x044
105 #define DINO_IO_PCI_ERR_RESP 0x048
106 #define DINO_IO_FBB_EN 0x05c
107 #define DINO_IO_ADDR_EN 0x060
108 #define DINO_PCI_ADDR 0x064
109 #define DINO_CONFIG_DATA 0x068
110 #define DINO_IO_DATA 0x06c
111 #define DINO_MEM_DATA 0x070 /* Dino 3.x only */
112 #define DINO_GSC2X_CONFIG 0x7b4
113 #define DINO_GMASK 0x800
114 #define DINO_PAMR 0x804
115 #define DINO_PAPR 0x808
116 #define DINO_DAMODE 0x80c
117 #define DINO_PCICMD 0x810
118 #define DINO_PCISTS 0x814
119 #define DINO_MLTIM 0x81c
120 #define DINO_BRDG_FEAT 0x820
121 #define DINO_PCIROR 0x824
122 #define DINO_PCIWOR 0x828
123 #define DINO_TLTIM 0x830
125 #define DINO_IRQS 11 /* bits 0-10 are architected */
126 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
127 #define DINO_LOCAL_IRQS (DINO_IRQS+1)
129 #define DINO_MASK_IRQ(x) (1<<(x))
131 #define PCIINTA 0x001
132 #define PCIINTB 0x002
133 #define PCIINTC 0x004
134 #define PCIINTD 0x008
135 #define PCIINTE 0x010
136 #define PCIINTF 0x020
137 #define GSCEXTINT 0x040
138 /* #define xxx 0x080 - bit 7 is "default" */
139 /* #define xxx 0x100 - bit 8 not used */
140 /* #define xxx 0x200 - bit 9 not used */
141 #define RS232INT 0x400
145 struct pci_hba_data hba; /* 'C' inheritance - must be first */
146 spinlock_t dinosaur_pen;
147 unsigned long txn_addr; /* EIR addr to generate interrupt */
148 u32 txn_data; /* EIR data assign to each dino */
149 u32 imr; /* IRQ's which are enabled */
150 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */
152 unsigned int dino_irr0; /* save most recent IRQ line stat */
156 /* Looks nice and keeps the compiler happy */
157 #define DINO_DEV(d) ({ \
160 (struct dino_device *)__pdata; })
164 * Dino Configuration Space Accessor Functions
167 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
170 * keep the current highest bus count to assist in allocating busses. This
171 * tries to keep a global bus count total so that when we discover an
172 * entirely new bus, it can be given a unique bus number.
174 static int dino_current_bus = 0;
176 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
179 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
180 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
181 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
182 void __iomem *base_addr = d->hba.base_addr;
185 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
187 spin_lock_irqsave(&d->dinosaur_pen, flags);
189 /* tell HW which CFG address */
190 __raw_writel(v, base_addr + DINO_PCI_ADDR);
192 /* generate cfg read cycle */
194 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3));
195 } else if (size == 2) {
196 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2));
197 } else if (size == 4) {
198 *val = readl(base_addr + DINO_CONFIG_DATA);
201 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
206 * Dino address stepping "feature":
207 * When address stepping, Dino attempts to drive the bus one cycle too soon
208 * even though the type of cycle (config vs. MMIO) might be different.
209 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping.
211 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
214 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
215 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
216 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
217 void __iomem *base_addr = d->hba.base_addr;
220 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
222 spin_lock_irqsave(&d->dinosaur_pen, flags);
224 /* avoid address stepping feature */
225 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
226 __raw_readl(base_addr + DINO_CONFIG_DATA);
228 /* tell HW which CFG address */
229 __raw_writel(v, base_addr + DINO_PCI_ADDR);
230 /* generate cfg read cycle */
232 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3));
233 } else if (size == 2) {
234 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2));
235 } else if (size == 4) {
236 writel(val, base_addr + DINO_CONFIG_DATA);
239 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
243 static struct pci_ops dino_cfg_ops = {
244 .read = dino_cfg_read,
245 .write = dino_cfg_write,
250 * Dino "I/O Port" Space Accessor Functions
252 * Many PCI devices don't require use of I/O port space (eg Tulip,
253 * NCR720) since they export the same registers to both MMIO and
254 * I/O port space. Performance is going to stink if drivers use
255 * I/O port instead of MMIO.
258 #define DINO_PORT_IN(type, size, mask) \
259 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
262 unsigned long flags; \
263 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
264 /* tell HW which IO Port address */ \
265 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
266 /* generate I/O PORT read cycle */ \
267 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
268 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
272 DINO_PORT_IN(b, 8, 3)
273 DINO_PORT_IN(w, 16, 2)
274 DINO_PORT_IN(l, 32, 0)
276 #define DINO_PORT_OUT(type, size, mask) \
277 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
279 unsigned long flags; \
280 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
281 /* tell HW which IO port address */ \
282 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
283 /* generate cfg write cycle */ \
284 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \
285 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
288 DINO_PORT_OUT(b, 8, 3)
289 DINO_PORT_OUT(w, 16, 2)
290 DINO_PORT_OUT(l, 32, 0)
292 static struct pci_port_ops dino_port_ops = {
301 static void dino_mask_irq(struct irq_data *d)
303 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
304 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
306 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq);
308 /* Clear the matching bit in the IMR register */
309 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
310 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
313 static void dino_unmask_irq(struct irq_data *d)
315 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
316 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
319 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq);
322 ** clear pending IRQ bits
324 ** This does NOT change ILR state!
325 ** See comment below for ILR usage.
327 __raw_readl(dino_dev->hba.base_addr+DINO_IPR);
329 /* set the matching bit in the IMR register */
330 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */
331 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
333 /* Emulate "Level Triggered" Interrupt
334 ** Basically, a driver is blowing it if the IRQ line is asserted
335 ** while the IRQ is disabled. But tulip.c seems to do that....
336 ** Give 'em a kluge award and a nice round of applause!
338 ** The gsc_write will generate an interrupt which invokes dino_isr().
339 ** dino_isr() will read IPR and find nothing. But then catch this
340 ** when it also checks ILR.
342 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR);
343 if (tmp & DINO_MASK_IRQ(local_irq)) {
344 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
346 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
350 static struct irq_chip dino_interrupt_type = {
352 .irq_unmask = dino_unmask_irq,
353 .irq_mask = dino_mask_irq,
358 * Handle a Processor interrupt generated by Dino.
360 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
361 * wedging the CPU. Could be removed or made optional at some point.
363 static irqreturn_t dino_isr(int irq, void *intr_dev)
365 struct dino_device *dino_dev = intr_dev;
369 /* read and acknowledge pending interrupts */
371 dino_dev->dino_irr0 =
373 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
380 int local_irq = __ffs(mask);
381 int irq = dino_dev->global_irq[local_irq];
382 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
383 __func__, irq, intr_dev, mask);
384 generic_handle_irq(irq);
385 mask &= ~(1 << local_irq);
388 /* Support for level triggered IRQ lines.
390 ** Dropping this support would make this routine *much* faster.
391 ** But since PCI requires level triggered IRQ line to share lines...
392 ** device drivers may assume lines are level triggered (and not
393 ** edge triggered like EISA/ISA can be).
395 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
399 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n",
400 dino_dev->hba.base_addr, mask);
406 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
408 int irq = gsc_assign_irq(&dino_interrupt_type, dino);
413 dino->global_irq[local_irq] = irq;
416 static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
419 struct dino_device *dino = ctrl;
421 switch (dev->id.sversion) {
422 case 0x00084: irq = 8; break; /* PS/2 */
423 case 0x0008c: irq = 10; break; /* RS232 */
424 case 0x00096: irq = 8; break; /* PS/2 */
425 default: return; /* Unknown */
428 dino_assign_irq(dino, irq, &dev->irq);
433 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de)
434 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...)
436 static void quirk_cirrus_cardbus(struct pci_dev *dev)
438 u8 new_irq = dev->irq - 1;
439 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n",
440 pci_name(dev), dev->irq, new_irq);
443 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
449 DBG("dino_bios_init\n");
453 * dino_card_setup - Set up the memory space for a Dino in card mode.
454 * @bus: the bus under this dino
456 * Claim an 8MB chunk of unused IO space and call the generic PCI routines
457 * to set up the addresses of the devices on this bus.
459 #define _8MB 0x00800000UL
461 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
464 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
465 struct resource *res;
469 res = &dino_dev->hba.lmmio_space;
470 res->flags = IORESOURCE_MEM;
471 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)",
472 dev_name(bus->bridge));
473 res->name = kmalloc(size+1, GFP_KERNEL);
475 strcpy((char *)res->name, name);
477 res->name = dino_dev->hba.lmmio_space.name;
480 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
481 F_EXTEND(0xf0000000UL) | _8MB,
482 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
483 struct pci_dev *dev, *tmp;
485 printk(KERN_ERR "Dino: cannot attach bus %s\n",
486 dev_name(bus->bridge));
487 /* kill the bus, we can't do anything with it */
488 list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
489 list_del(&dev->bus_list);
494 bus->resource[1] = res;
495 bus->resource[0] = &(dino_dev->hba.io_space);
497 /* Now tell dino what range it has */
498 for (i = 1; i < 31; i++) {
499 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
502 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
503 i, res->start, base_addr + DINO_IO_ADDR_EN);
504 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
508 dino_card_fixup(struct pci_dev *dev)
513 ** REVISIT: card-mode PCI-PCI expansion chassis do exist.
514 ** Not sure they were ever productized.
515 ** Die here since we'll die later in dino_inb() anyway.
517 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
518 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
522 ** Set Latency Timer to 0xff (not a shared bus)
523 ** Set CACHELINE_SIZE.
525 dino_cfg_write(dev->bus, dev->devfn,
526 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4);
529 ** Program INT_LINE for card-mode devices.
530 ** The cards are hardwired according to this algorithm.
531 ** And it doesn't matter if PPB's are present or not since
532 ** the IRQ lines bypass the PPB.
534 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
535 ** The additional "-1" adjusts for skewing the IRQ<->slot.
537 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin);
538 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
540 /* Shouldn't really need to do this but it's in case someone tries
541 ** to bypass PCI services and look at the card themselves.
543 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq);
546 /* The alignment contraints for PCI bridges under dino */
547 #define DINO_BRIDGE_ALIGN 0x100000
551 dino_fixup_bus(struct pci_bus *bus)
554 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
556 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n",
557 __func__, bus, bus->busn_res.start,
558 bus->bridge->platform_data);
560 /* Firmware doesn't set up card-mode dino, so we have to */
561 if (is_card_dino(&dino_dev->hba.dev->id)) {
562 dino_card_setup(bus, dino_dev->hba.base_addr);
563 } else if (bus->parent) {
566 pci_read_bridge_bases(bus);
569 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
570 if((bus->self->resource[i].flags &
571 (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
574 if(bus->self->resource[i].flags & IORESOURCE_MEM) {
575 /* There's a quirk to alignment of
576 * bridge memory resources: the start
577 * is the alignment and start-end is
578 * the size. However, firmware will
579 * have assigned start and end, so we
580 * need to take this into account */
581 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
582 bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
586 DBG("DEBUG %s assigning %d [%pR]\n",
587 dev_name(&bus->self->dev), i,
588 &bus->self->resource[i]);
589 WARN_ON(pci_assign_resource(bus->self, i));
590 DBG("DEBUG %s after assign %d [%pR]\n",
591 dev_name(&bus->self->dev), i,
592 &bus->self->resource[i]);
597 list_for_each_entry(dev, &bus->devices, bus_list) {
598 if (is_card_dino(&dino_dev->hba.dev->id))
599 dino_card_fixup(dev);
602 ** P2PB's only have 2 BARs, no IRQs.
603 ** I'd like to just ignore them for now.
605 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
606 pcibios_init_bridge(dev);
610 /* null out the ROM resource if there is one (we don't
611 * care about an expansion rom on parisc, since it
612 * usually contains (x86) bios code) */
613 dev->resource[PCI_ROM_RESOURCE].flags = 0;
615 if(dev->irq == 255) {
617 #define DINO_FIX_UNASSIGNED_INTERRUPTS
618 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
620 /* This code tries to assign an unassigned
621 * interrupt. Leave it disabled unless you
622 * *really* know what you're doing since the
623 * pin<->interrupt line mapping varies by bus
628 dino_cfg_read(dev->bus, dev->devfn,
629 PCI_INTERRUPT_PIN, 1, &irq_pin);
630 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
631 printk(KERN_WARNING "Device %s has undefined IRQ, "
632 "setting to %d\n", pci_name(dev), irq_pin);
633 dino_cfg_write(dev->bus, dev->devfn,
634 PCI_INTERRUPT_LINE, 1, irq_pin);
635 dino_assign_irq(dino_dev, irq_pin, &dev->irq);
638 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
641 /* Adjust INT_LINE for that busses region */
642 dino_assign_irq(dino_dev, dev->irq, &dev->irq);
648 static struct pci_bios_ops dino_bios_ops = {
649 .init = dino_bios_init,
650 .fixup_bus = dino_fixup_bus
655 * Initialise a DINO controller chip
658 dino_card_init(struct dino_device *dino_dev)
660 u32 brdg_feat = 0x00784e05;
661 unsigned long status;
663 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
664 if (status & 0x0000ff80) {
665 __raw_writel(0x00000005,
666 dino_dev->hba.base_addr+DINO_IO_COMMAND);
670 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
671 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
672 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
675 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
677 ** PCX-L processors don't support XQL like Dino wants it.
678 ** PCX-L2 ignore XQL signal and it doesn't matter.
680 brdg_feat &= ~0x4; /* UXQL */
682 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
685 ** Don't enable address decoding until we know which I/O range
686 ** currently is available from the host. Only affects MMIO
687 ** and not I/O port space.
689 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
691 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
692 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
693 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
695 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
696 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
697 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
699 /* Disable PAMR before writing PAPR */
700 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
701 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
702 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
705 ** Dino ERS encourages enabling FBB (0x6f).
706 ** We can't until we know *all* devices below us can support it.
707 ** (Something in device configuration header tells us).
709 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
711 /* Somewhere, the PCI spec says give devices 1 second
712 ** to recover from the #RESET being de-asserted.
713 ** Experience shows most devices only need 10ms.
714 ** This short-cut speeds up booting significantly.
716 mdelay(pci_post_reset_delay);
720 dino_bridge_init(struct dino_device *dino_dev, const char *name)
722 unsigned long io_addr;
723 int result, i, count=0;
724 struct resource *res, *prevres = NULL;
726 * Decoding IO_ADDR_EN only works for Built-in Dino
727 * since PDC has already initialized this.
730 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
732 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
736 res = &dino_dev->hba.lmmio_space;
737 for (i = 0; i < 32; i++) {
738 unsigned long start, end;
740 if((io_addr & (1 << i)) == 0)
743 start = F_EXTEND(0xf0000000UL) | (i << 23);
744 end = start + 8 * 1024 * 1024 - 1;
746 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
749 if(prevres && prevres->end + 1 == start) {
752 if(count >= DINO_MAX_LMMIO_RESOURCES) {
753 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
759 res->flags = IORESOURCE_MEM;
760 res->name = kmalloc(64, GFP_KERNEL);
762 snprintf((char *)res->name, 64, "%s LMMIO %d",
769 res = &dino_dev->hba.lmmio_space;
771 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
772 if(res[i].flags == 0)
775 result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
777 printk(KERN_ERR "%s: failed to claim PCI Bus address "
778 "space %d (%pR)!\n", name, i, &res[i]);
785 static int __init dino_common_init(struct parisc_device *dev,
786 struct dino_device *dino_dev, const char *name)
790 struct gsc_irq gsc_irq;
791 struct resource *res;
793 pcibios_register_hba(&dino_dev->hba);
795 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */
796 pci_port = &dino_port_ops;
799 ** Note: SMP systems can make use of IRR1/IAR1 registers
800 ** But it won't buy much performance except in very
801 ** specific applications/configurations. Note Dino
802 ** still only has 11 IRQ input lines - just map some of them
803 ** to a different processor.
805 dev->irq = gsc_alloc_irq(&gsc_irq);
806 dino_dev->txn_addr = gsc_irq.txn_addr;
807 dino_dev->txn_data = gsc_irq.txn_data;
808 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
811 ** Dino needs a PA "IRQ" to get a processor's attention.
812 ** arch/parisc/kernel/irq.c returns an EIRR bit.
815 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
819 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
821 printk(KERN_WARNING "%s: request_irq() failed with %d\n",
826 /* Support the serial port which is sometimes attached on built-in
830 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
833 ** This enables DINO to generate interrupts when it sees
834 ** any of its inputs *change*. Just asserting an IRQ
835 ** before it's enabled (ie unmasked) isn't good enough.
837 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
840 ** Some platforms don't clear Dino's IRR0 register at boot time.
841 ** Reading will clear it now.
843 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
845 /* allocate I/O Port resource region */
846 res = &dino_dev->hba.io_space;
847 if (!is_cujo(&dev->id)) {
848 res->name = "Dino I/O Port";
850 res->name = "Cujo I/O Port";
852 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
853 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
854 res->flags = IORESOURCE_IO; /* do not mark it busy ! */
855 if (request_resource(&ioport_resource, res) < 0) {
856 printk(KERN_ERR "%s: request I/O Port region failed "
857 "0x%lx/%lx (hpa 0x%p)\n",
858 name, (unsigned long)res->start, (unsigned long)res->end,
859 dino_dev->hba.base_addr);
866 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL)
867 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL)
868 #define CUJO_RAVEN_BADPAGE 0x01003000UL
869 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL
871 static const char *dino_vers[] = {
878 static const char *cujo_vers[] = {
883 void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
886 ** Determine if dino should claim this chip (return 0) or not (return 1).
887 ** If so, initialize the chip appropriately (card-mode vs bridge mode).
888 ** Much of the initialization is common though.
890 static int __init dino_probe(struct parisc_device *dev)
892 struct dino_device *dino_dev; // Dino specific control struct
893 const char *version = "unknown";
896 LIST_HEAD(resources);
898 unsigned long hpa = dev->hpa.start;
902 if (is_card_dino(&dev->id)) {
903 version = "3.x (card mode)";
905 if (!is_cujo(&dev->id)) {
906 if (dev->id.hversion_rev < 4) {
907 version = dino_vers[dev->id.hversion_rev];
912 if (dev->id.hversion_rev < 2) {
913 version = cujo_vers[dev->id.hversion_rev];
918 printk("%s version %s found at 0x%lx\n", name, version, hpa);
920 if (!request_mem_region(hpa, PAGE_SIZE, name)) {
921 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n",
927 if (is_cujo && dev->id.hversion_rev == 1) {
928 #ifdef CONFIG_IOMMU_CCIO
929 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
930 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
931 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
932 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
933 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
935 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
938 } else if (!is_cujo && !is_card_dino(&dev->id) &&
939 dev->id.hversion_rev < 3) {
941 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
942 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n"
943 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
944 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
945 dev->id.hversion_rev);
946 /* REVISIT: why are C200/C240 listed in the README table but not
947 ** "Models affected"? Could be an omission in the original literature.
951 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL);
953 printk("dino_init_chip - couldn't alloc dino_device\n");
957 dino_dev->hba.dev = dev;
958 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096);
959 dino_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
960 spin_lock_init(&dino_dev->dinosaur_pen);
961 dino_dev->hba.iommu = ccio_get_iommu(dev);
963 if (is_card_dino(&dev->id)) {
964 dino_card_init(dino_dev);
966 dino_bridge_init(dino_dev, name);
969 if (dino_common_init(dev, dino_dev, name))
972 dev->dev.platform_data = dino_dev;
974 pci_add_resource_offset(&resources, &dino_dev->hba.io_space,
975 HBA_PORT_BASE(dino_dev->hba.hba_num));
976 if (dino_dev->hba.lmmio_space.flags)
977 pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space,
978 dino_dev->hba.lmmio_space_offset);
979 if (dino_dev->hba.elmmio_space.flags)
980 pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space,
981 dino_dev->hba.lmmio_space_offset);
982 if (dino_dev->hba.gmmio_space.flags)
983 pci_add_resource(&resources, &dino_dev->hba.gmmio_space);
985 dino_dev->hba.bus_num.start = dino_current_bus;
986 dino_dev->hba.bus_num.end = 255;
987 dino_dev->hba.bus_num.flags = IORESOURCE_BUS;
988 pci_add_resource(&resources, &dino_dev->hba.bus_num);
990 ** It's not used to avoid chicken/egg problems
991 ** with configuration accessor functions.
993 dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
994 dino_current_bus, &dino_cfg_ops, NULL, &resources);
996 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
997 dev_name(&dev->dev), dino_current_bus);
998 pci_free_resource_list(&resources);
999 /* increment the bus number in case of duplicates */
1004 max = pci_scan_child_bus(bus);
1005 pci_bus_update_busn_res_end(bus, max);
1007 /* This code *depends* on scanning being single threaded
1008 * if it isn't, this global bus number count will fail
1010 dino_current_bus = max + 1;
1011 pci_bus_assign_resources(bus);
1012 pci_bus_add_devices(bus);
1017 * Normally, we would just test sversion. But the Elroy PCI adapter has
1018 * the same sversion as Dino, so we have to check hversion as well.
1019 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
1020 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
1021 * For card-mode Dino, most machines report an sversion of 9D. But 715
1022 * and 725 firmware misreport it as 0x08080 for no adequately explained
1025 static struct parisc_device_id dino_tbl[] = {
1026 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
1027 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
1028 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
1029 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
1030 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
1034 static struct parisc_driver dino_driver = {
1036 .id_table = dino_tbl,
1037 .probe = dino_probe,
1041 * One time initialization to let the world know Dino is here.
1042 * This is the only routine which is NOT static.
1043 * Must be called exactly once before pci_init().
1045 int __init dino_init(void)
1047 register_parisc_driver(&dino_driver);