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 */
58 #include <asm/system.h>
60 #include <asm/hardware.h>
67 #define DBG(x...) printk(x)
73 ** Config accessor functions only pass in the 8-bit bus number
74 ** and not the 8-bit "PCI Segment" number. Each Dino will be
75 ** assigned a PCI bus number based on "when" it's discovered.
77 ** The "secondary" bus number is set to this before calling
78 ** pci_scan_bus(). If any PPB's are present, the scan will
79 ** discover them and update the "secondary" and "subordinate"
80 ** fields in Dino's pci_bus structure.
82 ** Changes in the configuration *will* result in a different
83 ** bus number for each dino.
86 #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA)
87 #define is_cujo(id) ((id)->hversion == 0x682)
89 #define DINO_IAR0 0x004
90 #define DINO_IODC_ADDR 0x008
91 #define DINO_IODC_DATA_0 0x008
92 #define DINO_IODC_DATA_1 0x008
93 #define DINO_IRR0 0x00C
94 #define DINO_IAR1 0x010
95 #define DINO_IRR1 0x014
96 #define DINO_IMR 0x018
97 #define DINO_IPR 0x01C
98 #define DINO_TOC_ADDR 0x020
99 #define DINO_ICR 0x024
100 #define DINO_ILR 0x028
101 #define DINO_IO_COMMAND 0x030
102 #define DINO_IO_STATUS 0x034
103 #define DINO_IO_CONTROL 0x038
104 #define DINO_IO_GSC_ERR_RESP 0x040
105 #define DINO_IO_ERR_INFO 0x044
106 #define DINO_IO_PCI_ERR_RESP 0x048
107 #define DINO_IO_FBB_EN 0x05c
108 #define DINO_IO_ADDR_EN 0x060
109 #define DINO_PCI_ADDR 0x064
110 #define DINO_CONFIG_DATA 0x068
111 #define DINO_IO_DATA 0x06c
112 #define DINO_MEM_DATA 0x070 /* Dino 3.x only */
113 #define DINO_GSC2X_CONFIG 0x7b4
114 #define DINO_GMASK 0x800
115 #define DINO_PAMR 0x804
116 #define DINO_PAPR 0x808
117 #define DINO_DAMODE 0x80c
118 #define DINO_PCICMD 0x810
119 #define DINO_PCISTS 0x814
120 #define DINO_MLTIM 0x81c
121 #define DINO_BRDG_FEAT 0x820
122 #define DINO_PCIROR 0x824
123 #define DINO_PCIWOR 0x828
124 #define DINO_TLTIM 0x830
126 #define DINO_IRQS 11 /* bits 0-10 are architected */
127 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
128 #define DINO_LOCAL_IRQS (DINO_IRQS+1)
130 #define DINO_MASK_IRQ(x) (1<<(x))
132 #define PCIINTA 0x001
133 #define PCIINTB 0x002
134 #define PCIINTC 0x004
135 #define PCIINTD 0x008
136 #define PCIINTE 0x010
137 #define PCIINTF 0x020
138 #define GSCEXTINT 0x040
139 /* #define xxx 0x080 - bit 7 is "default" */
140 /* #define xxx 0x100 - bit 8 not used */
141 /* #define xxx 0x200 - bit 9 not used */
142 #define RS232INT 0x400
146 struct pci_hba_data hba; /* 'C' inheritance - must be first */
147 spinlock_t dinosaur_pen;
148 unsigned long txn_addr; /* EIR addr to generate interrupt */
149 u32 txn_data; /* EIR data assign to each dino */
150 u32 imr; /* IRQ's which are enabled */
151 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */
153 unsigned int dino_irr0; /* save most recent IRQ line stat */
157 /* Looks nice and keeps the compiler happy */
158 #define DINO_DEV(d) ((struct dino_device *) d)
162 * Dino Configuration Space Accessor Functions
165 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
168 * keep the current highest bus count to assist in allocating busses. This
169 * tries to keep a global bus count total so that when we discover an
170 * entirely new bus, it can be given a unique bus number.
172 static int dino_current_bus = 0;
174 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
177 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
178 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
179 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
180 void __iomem *base_addr = d->hba.base_addr;
183 DBG("%s: %p, %d, %d, %d\n", __FUNCTION__, base_addr, devfn, where,
185 spin_lock_irqsave(&d->dinosaur_pen, flags);
187 /* tell HW which CFG address */
188 __raw_writel(v, base_addr + DINO_PCI_ADDR);
190 /* generate cfg read cycle */
192 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3));
193 } else if (size == 2) {
194 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2));
195 } else if (size == 4) {
196 *val = readl(base_addr + DINO_CONFIG_DATA);
199 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
204 * Dino address stepping "feature":
205 * When address stepping, Dino attempts to drive the bus one cycle too soon
206 * even though the type of cycle (config vs. MMIO) might be different.
207 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping.
209 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
212 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
213 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
214 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
215 void __iomem *base_addr = d->hba.base_addr;
218 DBG("%s: %p, %d, %d, %d\n", __FUNCTION__, base_addr, devfn, where,
220 spin_lock_irqsave(&d->dinosaur_pen, flags);
222 /* avoid address stepping feature */
223 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
224 __raw_readl(base_addr + DINO_CONFIG_DATA);
226 /* tell HW which CFG address */
227 __raw_writel(v, base_addr + DINO_PCI_ADDR);
228 /* generate cfg read cycle */
230 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3));
231 } else if (size == 2) {
232 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2));
233 } else if (size == 4) {
234 writel(val, base_addr + DINO_CONFIG_DATA);
237 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
241 static struct pci_ops dino_cfg_ops = {
242 .read = dino_cfg_read,
243 .write = dino_cfg_write,
248 * Dino "I/O Port" Space Accessor Functions
250 * Many PCI devices don't require use of I/O port space (eg Tulip,
251 * NCR720) since they export the same registers to both MMIO and
252 * I/O port space. Performance is going to stink if drivers use
253 * I/O port instead of MMIO.
256 #define DINO_PORT_IN(type, size, mask) \
257 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
260 unsigned long flags; \
261 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
262 /* tell HW which IO Port address */ \
263 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
264 /* generate I/O PORT read cycle */ \
265 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
266 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
270 DINO_PORT_IN(b, 8, 3)
271 DINO_PORT_IN(w, 16, 2)
272 DINO_PORT_IN(l, 32, 0)
274 #define DINO_PORT_OUT(type, size, mask) \
275 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
277 unsigned long flags; \
278 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
279 /* tell HW which IO port address */ \
280 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
281 /* generate cfg write cycle */ \
282 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \
283 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
286 DINO_PORT_OUT(b, 8, 3)
287 DINO_PORT_OUT(w, 16, 2)
288 DINO_PORT_OUT(l, 32, 0)
290 struct pci_port_ops dino_port_ops = {
299 static void dino_disable_irq(unsigned int irq)
301 struct dino_device *dino_dev = irq_desc[irq].chip_data;
302 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
304 DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, irq);
306 /* Clear the matching bit in the IMR register */
307 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
308 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
311 static void dino_enable_irq(unsigned int irq)
313 struct dino_device *dino_dev = irq_desc[irq].chip_data;
314 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
317 DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, irq);
320 ** clear pending IRQ bits
322 ** This does NOT change ILR state!
323 ** See comment below for ILR usage.
325 __raw_readl(dino_dev->hba.base_addr+DINO_IPR);
327 /* set the matching bit in the IMR register */
328 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */
329 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
331 /* Emulate "Level Triggered" Interrupt
332 ** Basically, a driver is blowing it if the IRQ line is asserted
333 ** while the IRQ is disabled. But tulip.c seems to do that....
334 ** Give 'em a kluge award and a nice round of applause!
336 ** The gsc_write will generate an interrupt which invokes dino_isr().
337 ** dino_isr() will read IPR and find nothing. But then catch this
338 ** when it also checks ILR.
340 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR);
341 if (tmp & DINO_MASK_IRQ(local_irq)) {
342 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
344 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
348 static unsigned int dino_startup_irq(unsigned int irq)
350 dino_enable_irq(irq);
354 static struct hw_interrupt_type dino_interrupt_type = {
355 .typename = "GSC-PCI",
356 .startup = dino_startup_irq,
357 .shutdown = dino_disable_irq,
358 .enable = dino_enable_irq,
359 .disable = dino_disable_irq,
366 * Handle a Processor interrupt generated by Dino.
368 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
369 * wedging the CPU. Could be removed or made optional at some point.
371 static irqreturn_t dino_isr(int irq, void *intr_dev)
373 struct dino_device *dino_dev = intr_dev;
377 /* read and acknowledge pending interrupts */
379 dino_dev->dino_irr0 =
381 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
388 int local_irq = __ffs(mask);
389 int irq = dino_dev->global_irq[local_irq];
390 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
391 __FUNCTION__, irq, intr_dev, mask);
393 mask &= ~(1 << local_irq);
396 /* Support for level triggered IRQ lines.
398 ** Dropping this support would make this routine *much* faster.
399 ** But since PCI requires level triggered IRQ line to share lines...
400 ** device drivers may assume lines are level triggered (and not
401 ** edge triggered like EISA/ISA can be).
403 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
407 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n",
408 dino_dev->hba.base_addr, mask);
414 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
416 int irq = gsc_assign_irq(&dino_interrupt_type, dino);
421 dino->global_irq[local_irq] = irq;
424 static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
427 struct dino_device *dino = ctrl;
429 switch (dev->id.sversion) {
430 case 0x00084: irq = 8; break; /* PS/2 */
431 case 0x0008c: irq = 10; break; /* RS232 */
432 case 0x00096: irq = 8; break; /* PS/2 */
433 default: return; /* Unknown */
436 dino_assign_irq(dino, irq, &dev->irq);
441 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de)
442 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...)
444 static void __devinit quirk_cirrus_cardbus(struct pci_dev *dev)
446 u8 new_irq = dev->irq - 1;
447 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n",
448 pci_name(dev), dev->irq, new_irq);
451 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
457 DBG("dino_bios_init\n");
461 * dino_card_setup - Set up the memory space for a Dino in card mode.
462 * @bus: the bus under this dino
464 * Claim an 8MB chunk of unused IO space and call the generic PCI routines
465 * to set up the addresses of the devices on this bus.
467 #define _8MB 0x00800000UL
469 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
472 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
473 struct resource *res;
477 res = &dino_dev->hba.lmmio_space;
478 res->flags = IORESOURCE_MEM;
479 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)",
480 bus->bridge->bus_id);
481 res->name = kmalloc(size+1, GFP_KERNEL);
483 strcpy((char *)res->name, name);
485 res->name = dino_dev->hba.lmmio_space.name;
488 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
489 F_EXTEND(0xf0000000UL) | _8MB,
490 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
491 struct list_head *ln, *tmp_ln;
493 printk(KERN_ERR "Dino: cannot attach bus %s\n",
494 bus->bridge->bus_id);
495 /* kill the bus, we can't do anything with it */
496 list_for_each_safe(ln, tmp_ln, &bus->devices) {
497 struct pci_dev *dev = pci_dev_b(ln);
499 list_del(&dev->global_list);
500 list_del(&dev->bus_list);
505 bus->resource[1] = res;
506 bus->resource[0] = &(dino_dev->hba.io_space);
508 /* Now tell dino what range it has */
509 for (i = 1; i < 31; i++) {
510 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
513 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
514 i, res->start, base_addr + DINO_IO_ADDR_EN);
515 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
519 dino_card_fixup(struct pci_dev *dev)
524 ** REVISIT: card-mode PCI-PCI expansion chassis do exist.
525 ** Not sure they were ever productized.
526 ** Die here since we'll die later in dino_inb() anyway.
528 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
529 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
533 ** Set Latency Timer to 0xff (not a shared bus)
534 ** Set CACHELINE_SIZE.
536 dino_cfg_write(dev->bus, dev->devfn,
537 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4);
540 ** Program INT_LINE for card-mode devices.
541 ** The cards are hardwired according to this algorithm.
542 ** And it doesn't matter if PPB's are present or not since
543 ** the IRQ lines bypass the PPB.
545 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
546 ** The additional "-1" adjusts for skewing the IRQ<->slot.
548 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin);
549 dev->irq = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
551 /* Shouldn't really need to do this but it's in case someone tries
552 ** to bypass PCI services and look at the card themselves.
554 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq);
557 /* The alignment contraints for PCI bridges under dino */
558 #define DINO_BRIDGE_ALIGN 0x100000
562 dino_fixup_bus(struct pci_bus *bus)
564 struct list_head *ln;
566 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
567 int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num);
569 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n",
570 __FUNCTION__, bus, bus->secondary,
571 bus->bridge->platform_data);
573 /* Firmware doesn't set up card-mode dino, so we have to */
574 if (is_card_dino(&dino_dev->hba.dev->id)) {
575 dino_card_setup(bus, dino_dev->hba.base_addr);
576 } else if(bus->parent == NULL) {
577 /* must have a dino above it, reparent the resources
578 * into the dino window */
580 struct resource *res = &dino_dev->hba.lmmio_space;
582 bus->resource[0] = &(dino_dev->hba.io_space);
583 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
584 if(res[i].flags == 0)
586 bus->resource[i+1] = &res[i];
589 } else if(bus->self) {
592 pci_read_bridge_bases(bus);
595 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
596 if((bus->self->resource[i].flags &
597 (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
600 if(bus->self->resource[i].flags & IORESOURCE_MEM) {
601 /* There's a quirk to alignment of
602 * bridge memory resources: the start
603 * is the alignment and start-end is
604 * the size. However, firmware will
605 * have assigned start and end, so we
606 * need to take this into account */
607 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
608 bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
612 DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n",
613 bus->self->dev.bus_id, i,
614 bus->self->resource[i].start,
615 bus->self->resource[i].end);
616 pci_assign_resource(bus->self, i);
617 DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n",
618 bus->self->dev.bus_id, i,
619 bus->self->resource[i].start,
620 bus->self->resource[i].end);
625 list_for_each(ln, &bus->devices) {
629 if (is_card_dino(&dino_dev->hba.dev->id))
630 dino_card_fixup(dev);
633 ** P2PB's only have 2 BARs, no IRQs.
634 ** I'd like to just ignore them for now.
636 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
639 /* Adjust the I/O Port space addresses */
640 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
641 struct resource *res = &dev->resource[i];
642 if (res->flags & IORESOURCE_IO) {
643 res->start |= port_base;
644 res->end |= port_base;
647 /* Sign Extend MMIO addresses */
648 else if (res->flags & IORESOURCE_MEM) {
649 res->start |= F_EXTEND(0UL);
650 res->end |= F_EXTEND(0UL);
654 /* null out the ROM resource if there is one (we don't
655 * care about an expansion rom on parisc, since it
656 * usually contains (x86) bios code) */
657 dev->resource[PCI_ROM_RESOURCE].flags = 0;
659 if(dev->irq == 255) {
661 #define DINO_FIX_UNASSIGNED_INTERRUPTS
662 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
664 /* This code tries to assign an unassigned
665 * interrupt. Leave it disabled unless you
666 * *really* know what you're doing since the
667 * pin<->interrupt line mapping varies by bus
672 dino_cfg_read(dev->bus, dev->devfn,
673 PCI_INTERRUPT_PIN, 1, &irq_pin);
674 irq_pin = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
675 printk(KERN_WARNING "Device %s has undefined IRQ, "
676 "setting to %d\n", pci_name(dev), irq_pin);
677 dino_cfg_write(dev->bus, dev->devfn,
678 PCI_INTERRUPT_LINE, 1, irq_pin);
679 dino_assign_irq(dino_dev, irq_pin, &dev->irq);
682 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
685 /* Adjust INT_LINE for that busses region */
686 dino_assign_irq(dino_dev, dev->irq, &dev->irq);
692 struct pci_bios_ops dino_bios_ops = {
693 .init = dino_bios_init,
694 .fixup_bus = dino_fixup_bus
699 * Initialise a DINO controller chip
702 dino_card_init(struct dino_device *dino_dev)
704 u32 brdg_feat = 0x00784e05;
705 unsigned long status;
707 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
708 if (status & 0x0000ff80) {
709 __raw_writel(0x00000005,
710 dino_dev->hba.base_addr+DINO_IO_COMMAND);
714 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
715 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
716 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
719 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
721 ** PCX-L processors don't support XQL like Dino wants it.
722 ** PCX-L2 ignore XQL signal and it doesn't matter.
724 brdg_feat &= ~0x4; /* UXQL */
726 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
729 ** Don't enable address decoding until we know which I/O range
730 ** currently is available from the host. Only affects MMIO
731 ** and not I/O port space.
733 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
735 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
736 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
737 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
739 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
740 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
741 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
743 /* Disable PAMR before writing PAPR */
744 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
745 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
746 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
749 ** Dino ERS encourages enabling FBB (0x6f).
750 ** We can't until we know *all* devices below us can support it.
751 ** (Something in device configuration header tells us).
753 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
755 /* Somewhere, the PCI spec says give devices 1 second
756 ** to recover from the #RESET being de-asserted.
757 ** Experience shows most devices only need 10ms.
758 ** This short-cut speeds up booting significantly.
760 mdelay(pci_post_reset_delay);
764 dino_bridge_init(struct dino_device *dino_dev, const char *name)
766 unsigned long io_addr;
767 int result, i, count=0;
768 struct resource *res, *prevres = NULL;
770 * Decoding IO_ADDR_EN only works for Built-in Dino
771 * since PDC has already initialized this.
774 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
776 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
780 res = &dino_dev->hba.lmmio_space;
781 for (i = 0; i < 32; i++) {
782 unsigned long start, end;
784 if((io_addr & (1 << i)) == 0)
787 start = F_EXTEND(0xf0000000UL) | (i << 23);
788 end = start + 8 * 1024 * 1024 - 1;
790 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
793 if(prevres && prevres->end + 1 == start) {
796 if(count >= DINO_MAX_LMMIO_RESOURCES) {
797 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
803 res->flags = IORESOURCE_MEM;
804 res->name = kmalloc(64, GFP_KERNEL);
806 snprintf((char *)res->name, 64, "%s LMMIO %d",
813 res = &dino_dev->hba.lmmio_space;
815 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
816 if(res[i].flags == 0)
819 result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
821 printk(KERN_ERR "%s: failed to claim PCI Bus address space %d (0x%lx-0x%lx)!\n", name, i, res[i].start, res[i].end);
828 static int __init dino_common_init(struct parisc_device *dev,
829 struct dino_device *dino_dev, const char *name)
833 struct gsc_irq gsc_irq;
834 struct resource *res;
836 pcibios_register_hba(&dino_dev->hba);
838 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */
839 pci_port = &dino_port_ops;
842 ** Note: SMP systems can make use of IRR1/IAR1 registers
843 ** But it won't buy much performance except in very
844 ** specific applications/configurations. Note Dino
845 ** still only has 11 IRQ input lines - just map some of them
846 ** to a different processor.
848 dev->irq = gsc_alloc_irq(&gsc_irq);
849 dino_dev->txn_addr = gsc_irq.txn_addr;
850 dino_dev->txn_data = gsc_irq.txn_data;
851 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
854 ** Dino needs a PA "IRQ" to get a processor's attention.
855 ** arch/parisc/kernel/irq.c returns an EIRR bit.
858 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
862 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
864 printk(KERN_WARNING "%s: request_irq() failed with %d\n",
869 /* Support the serial port which is sometimes attached on built-in
873 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
876 ** This enables DINO to generate interrupts when it sees
877 ** any of its inputs *change*. Just asserting an IRQ
878 ** before it's enabled (ie unmasked) isn't good enough.
880 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
883 ** Some platforms don't clear Dino's IRR0 register at boot time.
884 ** Reading will clear it now.
886 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
888 /* allocate I/O Port resource region */
889 res = &dino_dev->hba.io_space;
890 if (!is_cujo(&dev->id)) {
891 res->name = "Dino I/O Port";
893 res->name = "Cujo I/O Port";
895 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
896 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
897 res->flags = IORESOURCE_IO; /* do not mark it busy ! */
898 if (request_resource(&ioport_resource, res) < 0) {
899 printk(KERN_ERR "%s: request I/O Port region failed "
900 "0x%lx/%lx (hpa 0x%p)\n",
901 name, res->start, res->end, dino_dev->hba.base_addr);
908 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL)
909 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL)
910 #define CUJO_RAVEN_BADPAGE 0x01003000UL
911 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL
913 static const char *dino_vers[] = {
920 static const char *cujo_vers[] = {
925 void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
928 ** Determine if dino should claim this chip (return 0) or not (return 1).
929 ** If so, initialize the chip appropriately (card-mode vs bridge mode).
930 ** Much of the initialization is common though.
932 static int __init dino_probe(struct parisc_device *dev)
934 struct dino_device *dino_dev; // Dino specific control struct
935 const char *version = "unknown";
939 unsigned long hpa = dev->hpa.start;
942 if (is_card_dino(&dev->id)) {
943 version = "3.x (card mode)";
945 if (!is_cujo(&dev->id)) {
946 if (dev->id.hversion_rev < 4) {
947 version = dino_vers[dev->id.hversion_rev];
952 if (dev->id.hversion_rev < 2) {
953 version = cujo_vers[dev->id.hversion_rev];
958 printk("%s version %s found at 0x%lx\n", name, version, hpa);
960 if (!request_mem_region(hpa, PAGE_SIZE, name)) {
961 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n",
967 if (is_cujo && dev->id.hversion_rev == 1) {
968 #ifdef CONFIG_IOMMU_CCIO
969 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
970 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
971 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
972 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
973 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
975 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
978 } else if (!is_cujo && !is_card_dino(&dev->id) &&
979 dev->id.hversion_rev < 3) {
981 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
982 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n"
983 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
984 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
985 dev->id.hversion_rev);
986 /* REVISIT: why are C200/C240 listed in the README table but not
987 ** "Models affected"? Could be an omission in the original literature.
991 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL);
993 printk("dino_init_chip - couldn't alloc dino_device\n");
997 dino_dev->hba.dev = dev;
998 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096);
999 dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */
1000 spin_lock_init(&dino_dev->dinosaur_pen);
1001 dino_dev->hba.iommu = ccio_get_iommu(dev);
1003 if (is_card_dino(&dev->id)) {
1004 dino_card_init(dino_dev);
1006 dino_bridge_init(dino_dev, name);
1009 if (dino_common_init(dev, dino_dev, name))
1012 dev->dev.platform_data = dino_dev;
1015 ** It's not used to avoid chicken/egg problems
1016 ** with configuration accessor functions.
1018 bus = pci_scan_bus_parented(&dev->dev, dino_current_bus,
1019 &dino_cfg_ops, NULL);
1021 pci_bus_add_devices(bus);
1022 /* This code *depends* on scanning being single threaded
1023 * if it isn't, this global bus number count will fail
1025 dino_current_bus = bus->subordinate + 1;
1026 pci_bus_assign_resources(bus);
1028 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus);
1029 /* increment the bus number in case of duplicates */
1032 dino_dev->hba.hba_bus = bus;
1037 * Normally, we would just test sversion. But the Elroy PCI adapter has
1038 * the same sversion as Dino, so we have to check hversion as well.
1039 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
1040 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
1041 * For card-mode Dino, most machines report an sversion of 9D. But 715
1042 * and 725 firmware misreport it as 0x08080 for no adequately explained
1045 static struct parisc_device_id dino_tbl[] = {
1046 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
1047 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
1048 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
1049 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
1050 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
1054 static struct parisc_driver dino_driver = {
1056 .id_table = dino_tbl,
1057 .probe = dino_probe,
1061 * One time initialization to let the world know Dino is here.
1062 * This is the only routine which is NOT static.
1063 * Must be called exactly once before pci_init().
1065 int __init dino_init(void)
1067 register_parisc_driver(&dino_driver);