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
9 ** This program is free software; you can redistribute it and/or modify
10 ** it under the terms of the GNU General Public License as published by
11 ** the Free Software Foundation; either version 2 of the License, or
12 ** (at your option) any later version.
14 ** This module provides access to Dino PCI bus (config/IOport spaces)
15 ** and helps manage Dino IRQ lines.
17 ** Dino interrupt handling is a bit complicated.
18 ** Dino always writes to the broadcast EIR via irr0 for now.
19 ** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!)
20 ** Only one processor interrupt is used for the 11 IRQ line
23 ** The different between Built-in Dino and Card-Mode
24 ** dino is in chip initialization and pci device initialization.
26 ** Linux drivers can only use Card-Mode Dino if pci devices I/O port
27 ** BARs are configured and used by the driver. Programming MMIO address
28 ** requires substantial knowledge of available Host I/O address ranges
29 ** is currently not supported. Port/Config accessor functions are the
30 ** same. "BIOS" differences are handled within the existing routines.
34 ** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr)
35 ** - added support for the integrated RS232.
39 ** TODO: create a virtual address for each Dino HPA.
40 ** GSC code might be able to do this since IODC data tells us
41 ** how many pages are used. PCI subsystem could (must?) do this
42 ** for PCI drivers devices which implement/use MMIO registers.
45 #include <linux/config.h>
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)
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 */
128 #define DINO_MASK_IRQ(x) (1<<(x))
130 #define PCIINTA 0x001
131 #define PCIINTB 0x002
132 #define PCIINTC 0x004
133 #define PCIINTD 0x008
134 #define PCIINTE 0x010
135 #define PCIINTF 0x020
136 #define GSCEXTINT 0x040
137 /* #define xxx 0x080 - bit 7 is "default" */
138 /* #define xxx 0x100 - bit 8 not used */
139 /* #define xxx 0x200 - bit 9 not used */
140 #define RS232INT 0x400
144 struct pci_hba_data hba; /* 'C' inheritance - must be first */
145 spinlock_t dinosaur_pen;
146 unsigned long txn_addr; /* EIR addr to generate interrupt */
147 u32 txn_data; /* EIR data assign to each dino */
148 u32 imr; /* IRQ's which are enabled */
149 int global_irq[12]; /* map IMR bit to global irq */
151 unsigned int dino_irr0; /* save most recent IRQ line stat */
155 /* Looks nice and keeps the compiler happy */
156 #define DINO_DEV(d) ((struct dino_device *) d)
160 * Dino Configuration Space Accessor Functions
163 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
166 * keep the current highest bus count to assist in allocating busses. This
167 * tries to keep a global bus count total so that when we discover an
168 * entirely new bus, it can be given a unique bus number.
170 static int dino_current_bus = 0;
172 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
175 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
176 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
177 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
178 void __iomem *base_addr = d->hba.base_addr;
181 DBG("%s: %p, %d, %d, %d\n", __FUNCTION__, base_addr, devfn, where,
183 spin_lock_irqsave(&d->dinosaur_pen, flags);
185 /* tell HW which CFG address */
186 __raw_writel(v, base_addr + DINO_PCI_ADDR);
188 /* generate cfg read cycle */
190 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3));
191 } else if (size == 2) {
192 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2));
193 } else if (size == 4) {
194 *val = readl(base_addr + DINO_CONFIG_DATA);
197 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
202 * Dino address stepping "feature":
203 * When address stepping, Dino attempts to drive the bus one cycle too soon
204 * even though the type of cycle (config vs. MMIO) might be different.
205 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping.
207 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
210 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
211 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
212 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
213 void __iomem *base_addr = d->hba.base_addr;
216 DBG("%s: %p, %d, %d, %d\n", __FUNCTION__, base_addr, devfn, where,
218 spin_lock_irqsave(&d->dinosaur_pen, flags);
220 /* avoid address stepping feature */
221 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
222 __raw_readl(base_addr + DINO_CONFIG_DATA);
224 /* tell HW which CFG address */
225 __raw_writel(v, base_addr + DINO_PCI_ADDR);
226 /* generate cfg read cycle */
228 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3));
229 } else if (size == 2) {
230 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2));
231 } else if (size == 4) {
232 writel(val, base_addr + DINO_CONFIG_DATA);
235 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
239 static struct pci_ops dino_cfg_ops = {
240 .read = dino_cfg_read,
241 .write = dino_cfg_write,
246 * Dino "I/O Port" Space Accessor Functions
248 * Many PCI devices don't require use of I/O port space (eg Tulip,
249 * NCR720) since they export the same registers to both MMIO and
250 * I/O port space. Performance is going to stink if drivers use
251 * I/O port instead of MMIO.
254 #define DINO_PORT_IN(type, size, mask) \
255 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
258 unsigned long flags; \
259 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
260 /* tell HW which IO Port address */ \
261 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
262 /* generate I/O PORT read cycle */ \
263 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
264 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
268 DINO_PORT_IN(b, 8, 3)
269 DINO_PORT_IN(w, 16, 2)
270 DINO_PORT_IN(l, 32, 0)
272 #define DINO_PORT_OUT(type, size, mask) \
273 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
275 unsigned long flags; \
276 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
277 /* tell HW which IO port address */ \
278 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
279 /* generate cfg write cycle */ \
280 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \
281 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
284 DINO_PORT_OUT(b, 8, 3)
285 DINO_PORT_OUT(w, 16, 2)
286 DINO_PORT_OUT(l, 32, 0)
288 struct pci_port_ops dino_port_ops = {
297 static void dino_disable_irq(unsigned int irq)
299 struct dino_device *dino_dev = irq_desc[irq].handler_data;
300 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, irq);
302 DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, irq);
304 /* Clear the matching bit in the IMR register */
305 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
306 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
309 static void dino_enable_irq(unsigned int irq)
311 struct dino_device *dino_dev = irq_desc[irq].handler_data;
312 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, irq);
315 DBG(KERN_WARNING "%s(0x%p, %d)\n", __FUNCTION__, dino_dev, irq);
318 ** clear pending IRQ bits
320 ** This does NOT change ILR state!
321 ** See comment below for ILR usage.
323 __raw_readl(dino_dev->hba.base_addr+DINO_IPR);
325 /* set the matching bit in the IMR register */
326 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */
327 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
329 /* Emulate "Level Triggered" Interrupt
330 ** Basically, a driver is blowing it if the IRQ line is asserted
331 ** while the IRQ is disabled. But tulip.c seems to do that....
332 ** Give 'em a kluge award and a nice round of applause!
334 ** The gsc_write will generate an interrupt which invokes dino_isr().
335 ** dino_isr() will read IPR and find nothing. But then catch this
336 ** when it also checks ILR.
338 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR);
339 if (tmp & DINO_MASK_IRQ(local_irq)) {
340 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
342 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
346 static unsigned int dino_startup_irq(unsigned int irq)
348 dino_enable_irq(irq);
352 static struct hw_interrupt_type dino_interrupt_type = {
353 .typename = "GSC-PCI",
354 .startup = dino_startup_irq,
355 .shutdown = dino_disable_irq,
356 .enable = dino_enable_irq,
357 .disable = dino_disable_irq,
364 * Handle a Processor interrupt generated by Dino.
366 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
367 * wedging the CPU. Could be removed or made optional at some point.
370 dino_isr(int irq, void *intr_dev, struct pt_regs *regs)
372 struct dino_device *dino_dev = intr_dev;
376 /* read and acknowledge pending interrupts */
378 dino_dev->dino_irr0 =
380 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
387 int local_irq = __ffs(mask);
388 int irq = dino_dev->global_irq[local_irq];
389 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
390 __FUNCTION__, irq, intr_dev, mask);
392 mask &= ~(1 << local_irq);
395 /* Support for level triggered IRQ lines.
397 ** Dropping this support would make this routine *much* faster.
398 ** But since PCI requires level triggered IRQ line to share lines...
399 ** device drivers may assume lines are level triggered (and not
400 ** edge triggered like EISA/ISA can be).
402 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
406 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n",
407 dino_dev->hba.base_addr, mask);
413 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
415 int irq = gsc_assign_irq(&dino_interrupt_type, dino);
420 dino->global_irq[local_irq] = irq;
423 static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
426 struct dino_device *dino = ctrl;
428 switch (dev->id.sversion) {
429 case 0x00084: irq = 8; break; /* PS/2 */
430 case 0x0008c: irq = 10; break; /* RS232 */
431 case 0x00096: irq = 8; break; /* PS/2 */
432 default: return; /* Unknown */
435 dino_assign_irq(dino, irq, &dev->irq);
441 DBG("dino_bios_init\n");
445 * dino_card_setup - Set up the memory space for a Dino in card mode.
446 * @bus: the bus under this dino
448 * Claim an 8MB chunk of unused IO space and call the generic PCI routines
449 * to set up the addresses of the devices on this bus.
451 #define _8MB 0x00800000UL
453 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
456 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
457 struct resource *res;
461 res = &dino_dev->hba.lmmio_space;
462 res->flags = IORESOURCE_MEM;
463 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)",
464 bus->bridge->bus_id);
465 res->name = kmalloc(size+1, GFP_KERNEL);
467 strcpy((char *)res->name, name);
469 res->name = dino_dev->hba.lmmio_space.name;
472 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
473 F_EXTEND(0xf0000000UL) | _8MB,
474 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
475 struct list_head *ln, *tmp_ln;
477 printk(KERN_ERR "Dino: cannot attach bus %s\n",
478 bus->bridge->bus_id);
479 /* kill the bus, we can't do anything with it */
480 list_for_each_safe(ln, tmp_ln, &bus->devices) {
481 struct pci_dev *dev = pci_dev_b(ln);
483 list_del(&dev->global_list);
484 list_del(&dev->bus_list);
489 bus->resource[1] = res;
490 bus->resource[0] = &(dino_dev->hba.io_space);
492 /* Now tell dino what range it has */
493 for (i = 1; i < 31; i++) {
494 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
497 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
498 i, res->start, base_addr + DINO_IO_ADDR_EN);
499 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
503 dino_card_fixup(struct pci_dev *dev)
508 ** REVISIT: card-mode PCI-PCI expansion chassis do exist.
509 ** Not sure they were ever productized.
510 ** Die here since we'll die later in dino_inb() anyway.
512 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
513 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
517 ** Set Latency Timer to 0xff (not a shared bus)
518 ** Set CACHELINE_SIZE.
520 dino_cfg_write(dev->bus, dev->devfn,
521 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4);
524 ** Program INT_LINE for card-mode devices.
525 ** The cards are hardwired according to this algorithm.
526 ** And it doesn't matter if PPB's are present or not since
527 ** the IRQ lines bypass the PPB.
529 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
530 ** The additional "-1" adjusts for skewing the IRQ<->slot.
532 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin);
533 dev->irq = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
535 /* Shouldn't really need to do this but it's in case someone tries
536 ** to bypass PCI services and look at the card themselves.
538 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq);
541 /* The alignment contraints for PCI bridges under dino */
542 #define DINO_BRIDGE_ALIGN 0x100000
546 dino_fixup_bus(struct pci_bus *bus)
548 struct list_head *ln;
550 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
551 int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num);
553 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n",
554 __FUNCTION__, bus, bus->secondary,
555 bus->bridge->platform_data);
557 /* Firmware doesn't set up card-mode dino, so we have to */
558 if (is_card_dino(&dino_dev->hba.dev->id)) {
559 dino_card_setup(bus, dino_dev->hba.base_addr);
560 } else if(bus->parent == NULL) {
561 /* must have a dino above it, reparent the resources
562 * into the dino window */
564 struct resource *res = &dino_dev->hba.lmmio_space;
566 bus->resource[0] = &(dino_dev->hba.io_space);
567 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
568 if(res[i].flags == 0)
570 bus->resource[i+1] = &res[i];
573 } else if(bus->self) {
576 pci_read_bridge_bases(bus);
579 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
580 if((bus->self->resource[i].flags &
581 (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
584 if(bus->self->resource[i].flags & IORESOURCE_MEM) {
585 /* There's a quirk to alignment of
586 * bridge memory resources: the start
587 * is the alignment and start-end is
588 * the size. However, firmware will
589 * have assigned start and end, so we
590 * need to take this into account */
591 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
592 bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
596 DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n",
597 bus->self->dev.bus_id, i,
598 bus->self->resource[i].start,
599 bus->self->resource[i].end);
600 pci_assign_resource(bus->self, i);
601 DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n",
602 bus->self->dev.bus_id, i,
603 bus->self->resource[i].start,
604 bus->self->resource[i].end);
609 list_for_each(ln, &bus->devices) {
613 if (is_card_dino(&dino_dev->hba.dev->id))
614 dino_card_fixup(dev);
617 ** P2PB's only have 2 BARs, no IRQs.
618 ** I'd like to just ignore them for now.
620 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
623 /* Adjust the I/O Port space addresses */
624 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
625 struct resource *res = &dev->resource[i];
626 if (res->flags & IORESOURCE_IO) {
627 res->start |= port_base;
628 res->end |= port_base;
631 /* Sign Extend MMIO addresses */
632 else if (res->flags & IORESOURCE_MEM) {
633 res->start |= F_EXTEND(0UL);
634 res->end |= F_EXTEND(0UL);
638 /* null out the ROM resource if there is one (we don't
639 * care about an expansion rom on parisc, since it
640 * usually contains (x86) bios code) */
641 dev->resource[PCI_ROM_RESOURCE].flags = 0;
643 if(dev->irq == 255) {
645 #define DINO_FIX_UNASSIGNED_INTERRUPTS
646 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
648 /* This code tries to assign an unassigned
649 * interrupt. Leave it disabled unless you
650 * *really* know what you're doing since the
651 * pin<->interrupt line mapping varies by bus
656 dino_cfg_read(dev->bus, dev->devfn,
657 PCI_INTERRUPT_PIN, 1, &irq_pin);
658 irq_pin = (irq_pin + PCI_SLOT(dev->devfn) - 1) % 4 ;
659 printk(KERN_WARNING "Device %s has undefined IRQ, "
660 "setting to %d\n", pci_name(dev), irq_pin);
661 dino_cfg_write(dev->bus, dev->devfn,
662 PCI_INTERRUPT_LINE, 1, irq_pin);
663 dino_assign_irq(dino_dev, irq_pin, &dev->irq);
666 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
670 /* Adjust INT_LINE for that busses region */
671 dino_assign_irq(dino_dev, dev->irq, &dev->irq);
677 struct pci_bios_ops dino_bios_ops = {
678 .init = dino_bios_init,
679 .fixup_bus = dino_fixup_bus
684 * Initialise a DINO controller chip
687 dino_card_init(struct dino_device *dino_dev)
689 u32 brdg_feat = 0x00784e05;
690 unsigned long status;
692 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
693 if (status & 0x0000ff80) {
694 __raw_writel(0x00000005,
695 dino_dev->hba.base_addr+DINO_IO_COMMAND);
699 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
700 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
701 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
704 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
706 ** PCX-L processors don't support XQL like Dino wants it.
707 ** PCX-L2 ignore XQL signal and it doesn't matter.
709 brdg_feat &= ~0x4; /* UXQL */
711 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
714 ** Don't enable address decoding until we know which I/O range
715 ** currently is available from the host. Only affects MMIO
716 ** and not I/O port space.
718 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
720 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
721 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
722 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
724 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
725 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
726 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
728 /* Disable PAMR before writing PAPR */
729 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
730 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
731 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
734 ** Dino ERS encourages enabling FBB (0x6f).
735 ** We can't until we know *all* devices below us can support it.
736 ** (Something in device configuration header tells us).
738 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
740 /* Somewhere, the PCI spec says give devices 1 second
741 ** to recover from the #RESET being de-asserted.
742 ** Experience shows most devices only need 10ms.
743 ** This short-cut speeds up booting significantly.
745 mdelay(pci_post_reset_delay);
749 dino_bridge_init(struct dino_device *dino_dev, const char *name)
751 unsigned long io_addr;
752 int result, i, count=0;
753 struct resource *res, *prevres = NULL;
755 * Decoding IO_ADDR_EN only works for Built-in Dino
756 * since PDC has already initialized this.
759 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
761 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
765 res = &dino_dev->hba.lmmio_space;
766 for (i = 0; i < 32; i++) {
767 unsigned long start, end;
769 if((io_addr & (1 << i)) == 0)
772 start = (unsigned long)(signed int)(0xf0000000 | (i << 23));
773 end = start + 8 * 1024 * 1024 - 1;
775 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
778 if(prevres && prevres->end + 1 == start) {
781 if(count >= DINO_MAX_LMMIO_RESOURCES) {
782 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
788 res->flags = IORESOURCE_MEM;
789 res->name = kmalloc(64, GFP_KERNEL);
791 snprintf((char *)res->name, 64, "%s LMMIO %d",
798 res = &dino_dev->hba.lmmio_space;
800 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
801 if(res[i].flags == 0)
804 result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
806 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);
813 static int __init dino_common_init(struct parisc_device *dev,
814 struct dino_device *dino_dev, const char *name)
818 struct gsc_irq gsc_irq;
819 struct resource *res;
821 pcibios_register_hba(&dino_dev->hba);
823 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */
824 pci_port = &dino_port_ops;
827 ** Note: SMP systems can make use of IRR1/IAR1 registers
828 ** But it won't buy much performance except in very
829 ** specific applications/configurations. Note Dino
830 ** still only has 11 IRQ input lines - just map some of them
831 ** to a different processor.
833 dev->irq = gsc_alloc_irq(&gsc_irq);
834 dino_dev->txn_addr = gsc_irq.txn_addr;
835 dino_dev->txn_data = gsc_irq.txn_data;
836 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
839 ** Dino needs a PA "IRQ" to get a processor's attention.
840 ** arch/parisc/kernel/irq.c returns an EIRR bit.
843 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
847 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
849 printk(KERN_WARNING "%s: request_irq() failed with %d\n",
854 /* Support the serial port which is sometimes attached on built-in
858 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
861 ** This enables DINO to generate interrupts when it sees
862 ** any of its inputs *change*. Just asserting an IRQ
863 ** before it's enabled (ie unmasked) isn't good enough.
865 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
868 ** Some platforms don't clear Dino's IRR0 register at boot time.
869 ** Reading will clear it now.
871 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
873 /* allocate I/O Port resource region */
874 res = &dino_dev->hba.io_space;
875 if (dev->id.hversion == 0x680 || is_card_dino(&dev->id)) {
876 res->name = "Dino I/O Port";
878 res->name = "Cujo I/O Port";
880 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
881 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
882 res->flags = IORESOURCE_IO; /* do not mark it busy ! */
883 if (request_resource(&ioport_resource, res) < 0) {
884 printk(KERN_ERR "%s: request I/O Port region failed "
885 "0x%lx/%lx (hpa 0x%p)\n",
886 name, res->start, res->end, dino_dev->hba.base_addr);
893 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL)
894 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL)
895 #define CUJO_RAVEN_BADPAGE 0x01003000UL
896 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL
898 static const char *dino_vers[] = {
905 static const char *cujo_vers[] = {
910 void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
913 ** Determine if dino should claim this chip (return 0) or not (return 1).
914 ** If so, initialize the chip appropriately (card-mode vs bridge mode).
915 ** Much of the initialization is common though.
917 static int __init dino_probe(struct parisc_device *dev)
919 struct dino_device *dino_dev; // Dino specific control struct
920 const char *version = "unknown";
924 unsigned long hpa = dev->hpa.start;
927 if (is_card_dino(&dev->id)) {
928 version = "3.x (card mode)";
930 if(dev->id.hversion == 0x680) {
931 if (dev->id.hversion_rev < 4) {
932 version = dino_vers[dev->id.hversion_rev];
937 if (dev->id.hversion_rev < 2) {
938 version = cujo_vers[dev->id.hversion_rev];
943 printk("%s version %s found at 0x%lx\n", name, version, hpa);
945 if (!request_mem_region(hpa, PAGE_SIZE, name)) {
946 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n",
952 if (is_cujo && dev->id.hversion_rev == 1) {
953 #ifdef CONFIG_IOMMU_CCIO
954 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
955 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
956 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
957 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
958 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
960 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
963 } else if (!is_cujo && !is_card_dino(&dev->id) &&
964 dev->id.hversion_rev < 3) {
966 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
967 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n"
968 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
969 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
970 dev->id.hversion_rev);
971 /* REVISIT: why are C200/C240 listed in the README table but not
972 ** "Models affected"? Could be an omission in the original literature.
976 dino_dev = kmalloc(sizeof(struct dino_device), GFP_KERNEL);
978 printk("dino_init_chip - couldn't alloc dino_device\n");
982 memset(dino_dev, 0, sizeof(struct dino_device));
984 dino_dev->hba.dev = dev;
985 dino_dev->hba.base_addr = ioremap(hpa, 4096);
986 dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */
987 spin_lock_init(&dino_dev->dinosaur_pen);
988 dino_dev->hba.iommu = ccio_get_iommu(dev);
990 if (is_card_dino(&dev->id)) {
991 dino_card_init(dino_dev);
993 dino_bridge_init(dino_dev, name);
996 if (dino_common_init(dev, dino_dev, name))
999 dev->dev.platform_data = dino_dev;
1002 ** It's not used to avoid chicken/egg problems
1003 ** with configuration accessor functions.
1005 bus = pci_scan_bus_parented(&dev->dev, dino_current_bus,
1006 &dino_cfg_ops, NULL);
1008 pci_bus_add_devices(bus);
1009 /* This code *depends* on scanning being single threaded
1010 * if it isn't, this global bus number count will fail
1012 dino_current_bus = bus->subordinate + 1;
1013 pci_bus_assign_resources(bus);
1015 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus);
1016 /* increment the bus number in case of duplicates */
1019 dino_dev->hba.hba_bus = bus;
1024 * Normally, we would just test sversion. But the Elroy PCI adapter has
1025 * the same sversion as Dino, so we have to check hversion as well.
1026 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
1027 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
1028 * For card-mode Dino, most machines report an sversion of 9D. But 715
1029 * and 725 firmware misreport it as 0x08080 for no adequately explained
1032 static struct parisc_device_id dino_tbl[] = {
1033 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
1034 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
1035 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
1036 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
1037 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
1041 static struct parisc_driver dino_driver = {
1043 .id_table = dino_tbl,
1044 .probe = dino_probe,
1048 * One time initialization to let the world know Dino is here.
1049 * This is the only routine which is NOT static.
1050 * Must be called exactly once before pci_init().
1052 int __init dino_init(void)
1054 register_parisc_driver(&dino_driver);