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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2** DINO manager
3**
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
Helge Deller5076c152006-03-27 12:52:15 -07008** (c) Copyright 2006 Helge Deller
Linus Torvalds1da177e2005-04-16 15:20:36 -07009**
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.
14**
15** This module provides access to Dino PCI bus (config/IOport spaces)
16** and helps manage Dino IRQ lines.
17**
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
22** inputs to dino.
23**
24** The different between Built-in Dino and Card-Mode
25** dino is in chip initialization and pci device initialization.
26**
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.
32*/
33
34/* Changes :
35** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr)
36** - added support for the integrated RS232.
37*/
38
39/*
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.
44*/
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#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 */
55
56#include <asm/pdc.h>
57#include <asm/page.h>
58#include <asm/system.h>
59#include <asm/io.h>
60#include <asm/hardware.h>
61
62#include "gsc.h"
63
64#undef DINO_DEBUG
65
66#ifdef DINO_DEBUG
67#define DBG(x...) printk(x)
68#else
69#define DBG(x...)
70#endif
71
72/*
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.
76**
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.
81**
82** Changes in the configuration *will* result in a different
83** bus number for each dino.
84*/
85
Matthew Wilcoxf45adcf2006-01-10 20:48:06 -050086#define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA)
87#define is_cujo(id) ((id)->hversion == 0x682)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
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
125
126#define DINO_IRQS 11 /* bits 0-10 are architected */
127#define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
Helge Deller4d64c9f2006-01-10 20:47:54 -0500128#define DINO_LOCAL_IRQS (DINO_IRQS+1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130#define DINO_MASK_IRQ(x) (1<<(x))
131
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
143
144struct dino_device
145{
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 */
Helge Deller4d64c9f2006-01-10 20:47:54 -0500151 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152#ifdef DINO_DEBUG
153 unsigned int dino_irr0; /* save most recent IRQ line stat */
154#endif
155};
156
157/* Looks nice and keeps the compiler happy */
158#define DINO_DEV(d) ((struct dino_device *) d)
159
160
161/*
162 * Dino Configuration Space Accessor Functions
163 */
164
165#define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
166
167/*
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.
171 */
172static int dino_current_bus = 0;
173
174static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
175 int size, u32 *val)
176{
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;
181 unsigned long flags;
182
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700183 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400184 size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 spin_lock_irqsave(&d->dinosaur_pen, flags);
186
187 /* tell HW which CFG address */
188 __raw_writel(v, base_addr + DINO_PCI_ADDR);
189
190 /* generate cfg read cycle */
191 if (size == 1) {
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);
197 }
198
199 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
200 return 0;
201}
202
203/*
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.
208 */
209static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
210 int size, u32 val)
211{
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;
216 unsigned long flags;
217
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700218 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400219 size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 spin_lock_irqsave(&d->dinosaur_pen, flags);
221
222 /* avoid address stepping feature */
223 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
224 __raw_readl(base_addr + DINO_CONFIG_DATA);
225
226 /* tell HW which CFG address */
227 __raw_writel(v, base_addr + DINO_PCI_ADDR);
228 /* generate cfg read cycle */
229 if (size == 1) {
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);
235 }
236
237 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
238 return 0;
239}
240
241static struct pci_ops dino_cfg_ops = {
242 .read = dino_cfg_read,
243 .write = dino_cfg_write,
244};
245
246
247/*
248 * Dino "I/O Port" Space Accessor Functions
249 *
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.
254 */
255
256#define DINO_PORT_IN(type, size, mask) \
257static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
258{ \
259 u##size v; \
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); \
267 return v; \
268}
269
270DINO_PORT_IN(b, 8, 3)
271DINO_PORT_IN(w, 16, 2)
272DINO_PORT_IN(l, 32, 0)
273
274#define DINO_PORT_OUT(type, size, mask) \
275static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
276{ \
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); \
284}
285
286DINO_PORT_OUT(b, 8, 3)
287DINO_PORT_OUT(w, 16, 2)
288DINO_PORT_OUT(l, 32, 0)
289
Adrian Bunkdf8e5bc2008-12-02 03:28:16 +0000290static struct pci_port_ops dino_port_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 .inb = dino_in8,
292 .inw = dino_in16,
293 .inl = dino_in32,
294 .outb = dino_out8,
295 .outw = dino_out16,
296 .outl = dino_out32
297};
298
299static void dino_disable_irq(unsigned int irq)
300{
Yinghai Lu08678b02008-08-19 20:50:05 -0700301 struct irq_desc *desc = irq_to_desc(irq);
302 struct dino_device *dino_dev = desc->chip_data;
Helge Deller4d64c9f2006-01-10 20:47:54 -0500303 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700305 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
307 /* Clear the matching bit in the IMR register */
308 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
309 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
310}
311
312static void dino_enable_irq(unsigned int irq)
313{
Yinghai Lu08678b02008-08-19 20:50:05 -0700314 struct irq_desc *desc = irq_to_desc(irq);
315 struct dino_device *dino_dev = desc->chip_data;
Helge Deller4d64c9f2006-01-10 20:47:54 -0500316 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 u32 tmp;
318
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700319 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 /*
322 ** clear pending IRQ bits
323 **
324 ** This does NOT change ILR state!
325 ** See comment below for ILR usage.
326 */
327 __raw_readl(dino_dev->hba.base_addr+DINO_IPR);
328
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);
332
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!
337 **
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.
341 */
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",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700345 __func__, tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
347 }
348}
349
350static unsigned int dino_startup_irq(unsigned int irq)
351{
352 dino_enable_irq(irq);
353 return 0;
354}
355
356static struct hw_interrupt_type dino_interrupt_type = {
357 .typename = "GSC-PCI",
358 .startup = dino_startup_irq,
359 .shutdown = dino_disable_irq,
360 .enable = dino_enable_irq,
361 .disable = dino_disable_irq,
362 .ack = no_ack_irq,
363 .end = no_end_irq,
364};
365
366
367/*
368 * Handle a Processor interrupt generated by Dino.
369 *
370 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
371 * wedging the CPU. Could be removed or made optional at some point.
372 */
David Howells7d12e782006-10-05 14:55:46 +0100373static irqreturn_t dino_isr(int irq, void *intr_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374{
375 struct dino_device *dino_dev = intr_dev;
376 u32 mask;
377 int ilr_loop = 100;
378
379 /* read and acknowledge pending interrupts */
380#ifdef DINO_DEBUG
381 dino_dev->dino_irr0 =
382#endif
383 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
384
385 if (mask == 0)
386 return IRQ_NONE;
387
388ilr_again:
389 do {
390 int local_irq = __ffs(mask);
391 int irq = dino_dev->global_irq[local_irq];
392 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700393 __func__, irq, intr_dev, mask);
Matthew Wilcoxbe577a52006-10-06 20:47:23 -0600394 __do_IRQ(irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 mask &= ~(1 << local_irq);
396 } while (mask);
397
398 /* Support for level triggered IRQ lines.
399 **
400 ** Dropping this support would make this routine *much* faster.
401 ** But since PCI requires level triggered IRQ line to share lines...
402 ** device drivers may assume lines are level triggered (and not
403 ** edge triggered like EISA/ISA can be).
404 */
405 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
406 if (mask) {
407 if (--ilr_loop > 0)
408 goto ilr_again;
409 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n",
410 dino_dev->hba.base_addr, mask);
411 return IRQ_NONE;
412 }
413 return IRQ_HANDLED;
414}
415
416static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
417{
418 int irq = gsc_assign_irq(&dino_interrupt_type, dino);
419 if (irq == NO_IRQ)
420 return;
421
422 *irqp = irq;
423 dino->global_irq[local_irq] = irq;
424}
425
426static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
427{
428 int irq;
429 struct dino_device *dino = ctrl;
430
431 switch (dev->id.sversion) {
432 case 0x00084: irq = 8; break; /* PS/2 */
433 case 0x0008c: irq = 10; break; /* RS232 */
434 case 0x00096: irq = 8; break; /* PS/2 */
435 default: return; /* Unknown */
436 }
437
438 dino_assign_irq(dino, irq, &dev->irq);
439}
440
Helge Deller04d35d72006-01-10 20:47:50 -0500441
442/*
443 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de)
444 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...)
445 */
446static void __devinit quirk_cirrus_cardbus(struct pci_dev *dev)
447{
448 u8 new_irq = dev->irq - 1;
449 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n",
450 pci_name(dev), dev->irq, new_irq);
451 dev->irq = new_irq;
452}
453DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
454
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456static void __init
457dino_bios_init(void)
458{
459 DBG("dino_bios_init\n");
460}
461
462/*
463 * dino_card_setup - Set up the memory space for a Dino in card mode.
464 * @bus: the bus under this dino
465 *
466 * Claim an 8MB chunk of unused IO space and call the generic PCI routines
467 * to set up the addresses of the devices on this bus.
468 */
469#define _8MB 0x00800000UL
470static void __init
471dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
472{
473 int i;
474 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
475 struct resource *res;
476 char name[128];
477 int size;
478
479 res = &dino_dev->hba.lmmio_space;
480 res->flags = IORESOURCE_MEM;
481 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)",
482 bus->bridge->bus_id);
483 res->name = kmalloc(size+1, GFP_KERNEL);
484 if(res->name)
485 strcpy((char *)res->name, name);
486 else
487 res->name = dino_dev->hba.lmmio_space.name;
488
489
490 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
491 F_EXTEND(0xf0000000UL) | _8MB,
492 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
493 struct list_head *ln, *tmp_ln;
494
495 printk(KERN_ERR "Dino: cannot attach bus %s\n",
496 bus->bridge->bus_id);
497 /* kill the bus, we can't do anything with it */
498 list_for_each_safe(ln, tmp_ln, &bus->devices) {
499 struct pci_dev *dev = pci_dev_b(ln);
500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 list_del(&dev->bus_list);
502 }
503
504 return;
505 }
506 bus->resource[1] = res;
507 bus->resource[0] = &(dino_dev->hba.io_space);
508
509 /* Now tell dino what range it has */
510 for (i = 1; i < 31; i++) {
511 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
512 break;
513 }
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400514 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 i, res->start, base_addr + DINO_IO_ADDR_EN);
516 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
517}
518
519static void __init
520dino_card_fixup(struct pci_dev *dev)
521{
522 u32 irq_pin;
523
524 /*
525 ** REVISIT: card-mode PCI-PCI expansion chassis do exist.
526 ** Not sure they were ever productized.
527 ** Die here since we'll die later in dino_inb() anyway.
528 */
529 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
530 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
531 }
532
533 /*
534 ** Set Latency Timer to 0xff (not a shared bus)
535 ** Set CACHELINE_SIZE.
536 */
537 dino_cfg_write(dev->bus, dev->devfn,
538 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4);
539
540 /*
541 ** Program INT_LINE for card-mode devices.
542 ** The cards are hardwired according to this algorithm.
543 ** And it doesn't matter if PPB's are present or not since
544 ** the IRQ lines bypass the PPB.
545 **
546 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
547 ** The additional "-1" adjusts for skewing the IRQ<->slot.
548 */
549 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin);
Bjorn Helgaasf0e88af2008-12-09 16:12:22 -0700550 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552 /* Shouldn't really need to do this but it's in case someone tries
553 ** to bypass PCI services and look at the card themselves.
554 */
555 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq);
556}
557
558/* The alignment contraints for PCI bridges under dino */
559#define DINO_BRIDGE_ALIGN 0x100000
560
561
562static void __init
563dino_fixup_bus(struct pci_bus *bus)
564{
565 struct list_head *ln;
566 struct pci_dev *dev;
567 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
568 int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num);
569
570 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700571 __func__, bus, bus->secondary,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 bus->bridge->platform_data);
573
574 /* Firmware doesn't set up card-mode dino, so we have to */
575 if (is_card_dino(&dino_dev->hba.dev->id)) {
576 dino_card_setup(bus, dino_dev->hba.base_addr);
577 } else if(bus->parent == NULL) {
578 /* must have a dino above it, reparent the resources
579 * into the dino window */
580 int i;
581 struct resource *res = &dino_dev->hba.lmmio_space;
582
583 bus->resource[0] = &(dino_dev->hba.io_space);
584 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
585 if(res[i].flags == 0)
586 break;
587 bus->resource[i+1] = &res[i];
588 }
589
590 } else if(bus->self) {
591 int i;
592
593 pci_read_bridge_bases(bus);
594
595
596 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
597 if((bus->self->resource[i].flags &
598 (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
599 continue;
600
601 if(bus->self->resource[i].flags & IORESOURCE_MEM) {
602 /* There's a quirk to alignment of
603 * bridge memory resources: the start
604 * is the alignment and start-end is
605 * the size. However, firmware will
606 * have assigned start and end, so we
607 * need to take this into account */
608 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
609 bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
610
611 }
612
613 DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n",
614 bus->self->dev.bus_id, i,
615 bus->self->resource[i].start,
616 bus->self->resource[i].end);
617 pci_assign_resource(bus->self, i);
618 DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n",
619 bus->self->dev.bus_id, i,
620 bus->self->resource[i].start,
621 bus->self->resource[i].end);
622 }
623 }
624
625
626 list_for_each(ln, &bus->devices) {
627 int i;
628
629 dev = pci_dev_b(ln);
630 if (is_card_dino(&dino_dev->hba.dev->id))
631 dino_card_fixup(dev);
632
633 /*
634 ** P2PB's only have 2 BARs, no IRQs.
635 ** I'd like to just ignore them for now.
636 */
637 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
638 continue;
639
640 /* Adjust the I/O Port space addresses */
641 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
642 struct resource *res = &dev->resource[i];
643 if (res->flags & IORESOURCE_IO) {
644 res->start |= port_base;
645 res->end |= port_base;
646 }
647#ifdef __LP64__
648 /* Sign Extend MMIO addresses */
649 else if (res->flags & IORESOURCE_MEM) {
650 res->start |= F_EXTEND(0UL);
651 res->end |= F_EXTEND(0UL);
652 }
653#endif
654 }
655 /* null out the ROM resource if there is one (we don't
656 * care about an expansion rom on parisc, since it
657 * usually contains (x86) bios code) */
658 dev->resource[PCI_ROM_RESOURCE].flags = 0;
659
660 if(dev->irq == 255) {
661
662#define DINO_FIX_UNASSIGNED_INTERRUPTS
663#ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
664
665 /* This code tries to assign an unassigned
666 * interrupt. Leave it disabled unless you
667 * *really* know what you're doing since the
668 * pin<->interrupt line mapping varies by bus
669 * and machine */
670
671 u32 irq_pin;
672
673 dino_cfg_read(dev->bus, dev->devfn,
674 PCI_INTERRUPT_PIN, 1, &irq_pin);
Bjorn Helgaasf0e88af2008-12-09 16:12:22 -0700675 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 printk(KERN_WARNING "Device %s has undefined IRQ, "
677 "setting to %d\n", pci_name(dev), irq_pin);
678 dino_cfg_write(dev->bus, dev->devfn,
679 PCI_INTERRUPT_LINE, 1, irq_pin);
680 dino_assign_irq(dino_dev, irq_pin, &dev->irq);
681#else
682 dev->irq = 65535;
683 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
684#endif
685 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 /* Adjust INT_LINE for that busses region */
687 dino_assign_irq(dino_dev, dev->irq, &dev->irq);
688 }
689 }
690}
691
692
Adrian Bunkdf8e5bc2008-12-02 03:28:16 +0000693static struct pci_bios_ops dino_bios_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 .init = dino_bios_init,
695 .fixup_bus = dino_fixup_bus
696};
697
698
699/*
700 * Initialise a DINO controller chip
701 */
702static void __init
703dino_card_init(struct dino_device *dino_dev)
704{
705 u32 brdg_feat = 0x00784e05;
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400706 unsigned long status;
707
708 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
709 if (status & 0x0000ff80) {
710 __raw_writel(0x00000005,
711 dino_dev->hba.base_addr+DINO_IO_COMMAND);
712 udelay(1);
713 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
715 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
716 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
717 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
718
719#if 1
720/* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
721 /*
722 ** PCX-L processors don't support XQL like Dino wants it.
723 ** PCX-L2 ignore XQL signal and it doesn't matter.
724 */
725 brdg_feat &= ~0x4; /* UXQL */
726#endif
727 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
728
729 /*
730 ** Don't enable address decoding until we know which I/O range
731 ** currently is available from the host. Only affects MMIO
732 ** and not I/O port space.
733 */
734 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
735
736 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
737 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
738 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
739
740 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
741 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
742 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
743
744 /* Disable PAMR before writing PAPR */
745 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
746 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
747 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
748
749 /*
750 ** Dino ERS encourages enabling FBB (0x6f).
751 ** We can't until we know *all* devices below us can support it.
752 ** (Something in device configuration header tells us).
753 */
754 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
755
756 /* Somewhere, the PCI spec says give devices 1 second
757 ** to recover from the #RESET being de-asserted.
758 ** Experience shows most devices only need 10ms.
759 ** This short-cut speeds up booting significantly.
760 */
761 mdelay(pci_post_reset_delay);
762}
763
764static int __init
765dino_bridge_init(struct dino_device *dino_dev, const char *name)
766{
767 unsigned long io_addr;
768 int result, i, count=0;
769 struct resource *res, *prevres = NULL;
770 /*
771 * Decoding IO_ADDR_EN only works for Built-in Dino
772 * since PDC has already initialized this.
773 */
774
775 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
776 if (io_addr == 0) {
777 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
778 return -ENODEV;
779 }
780
781 res = &dino_dev->hba.lmmio_space;
782 for (i = 0; i < 32; i++) {
783 unsigned long start, end;
784
785 if((io_addr & (1 << i)) == 0)
786 continue;
787
Helge Deller5076c152006-03-27 12:52:15 -0700788 start = F_EXTEND(0xf0000000UL) | (i << 23);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 end = start + 8 * 1024 * 1024 - 1;
790
791 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
792 start, end);
793
794 if(prevres && prevres->end + 1 == start) {
795 prevres->end = end;
796 } else {
797 if(count >= DINO_MAX_LMMIO_RESOURCES) {
798 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
799 break;
800 }
801 prevres = res;
802 res->start = start;
803 res->end = end;
804 res->flags = IORESOURCE_MEM;
805 res->name = kmalloc(64, GFP_KERNEL);
806 if(res->name)
807 snprintf((char *)res->name, 64, "%s LMMIO %d",
808 name, count);
809 res++;
810 count++;
811 }
812 }
813
814 res = &dino_dev->hba.lmmio_space;
815
816 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
817 if(res[i].flags == 0)
818 break;
819
820 result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
821 if (result < 0) {
822 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);
823 return result;
824 }
825 }
826 return 0;
827}
828
829static int __init dino_common_init(struct parisc_device *dev,
830 struct dino_device *dino_dev, const char *name)
831{
832 int status;
833 u32 eim;
834 struct gsc_irq gsc_irq;
835 struct resource *res;
836
837 pcibios_register_hba(&dino_dev->hba);
838
839 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */
840 pci_port = &dino_port_ops;
841
842 /*
843 ** Note: SMP systems can make use of IRR1/IAR1 registers
844 ** But it won't buy much performance except in very
845 ** specific applications/configurations. Note Dino
846 ** still only has 11 IRQ input lines - just map some of them
847 ** to a different processor.
848 */
849 dev->irq = gsc_alloc_irq(&gsc_irq);
850 dino_dev->txn_addr = gsc_irq.txn_addr;
851 dino_dev->txn_data = gsc_irq.txn_data;
852 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
853
854 /*
855 ** Dino needs a PA "IRQ" to get a processor's attention.
856 ** arch/parisc/kernel/irq.c returns an EIRR bit.
857 */
858 if (dev->irq < 0) {
859 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
860 return 1;
861 }
862
863 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
864 if (status) {
865 printk(KERN_WARNING "%s: request_irq() failed with %d\n",
866 name, status);
867 return 1;
868 }
869
870 /* Support the serial port which is sometimes attached on built-in
871 * Dino / Cujo chips.
872 */
873
874 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
875
876 /*
877 ** This enables DINO to generate interrupts when it sees
878 ** any of its inputs *change*. Just asserting an IRQ
879 ** before it's enabled (ie unmasked) isn't good enough.
880 */
881 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
882
883 /*
884 ** Some platforms don't clear Dino's IRR0 register at boot time.
885 ** Reading will clear it now.
886 */
887 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
888
889 /* allocate I/O Port resource region */
890 res = &dino_dev->hba.io_space;
Matthew Wilcoxf45adcf2006-01-10 20:48:06 -0500891 if (!is_cujo(&dev->id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 res->name = "Dino I/O Port";
893 } else {
894 res->name = "Cujo I/O Port";
895 }
896 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
897 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
898 res->flags = IORESOURCE_IO; /* do not mark it busy ! */
899 if (request_resource(&ioport_resource, res) < 0) {
900 printk(KERN_ERR "%s: request I/O Port region failed "
901 "0x%lx/%lx (hpa 0x%p)\n",
902 name, res->start, res->end, dino_dev->hba.base_addr);
903 return 1;
904 }
905
906 return 0;
907}
908
909#define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL)
910#define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL)
911#define CUJO_RAVEN_BADPAGE 0x01003000UL
912#define CUJO_FIREHAWK_BADPAGE 0x01607000UL
913
914static const char *dino_vers[] = {
915 "2.0",
916 "2.1",
917 "3.0",
918 "3.1"
919};
920
921static const char *cujo_vers[] = {
922 "1.0",
923 "2.0"
924};
925
926void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
927
928/*
929** Determine if dino should claim this chip (return 0) or not (return 1).
930** If so, initialize the chip appropriately (card-mode vs bridge mode).
931** Much of the initialization is common though.
932*/
Matthew Wilcox53f01bb2005-10-21 22:36:40 -0400933static int __init dino_probe(struct parisc_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934{
935 struct dino_device *dino_dev; // Dino specific control struct
936 const char *version = "unknown";
937 char *name;
938 int is_cujo = 0;
939 struct pci_bus *bus;
Matthew Wilcox53f01bb2005-10-21 22:36:40 -0400940 unsigned long hpa = dev->hpa.start;
941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 name = "Dino";
943 if (is_card_dino(&dev->id)) {
944 version = "3.x (card mode)";
945 } else {
Matthew Wilcoxf45adcf2006-01-10 20:48:06 -0500946 if (!is_cujo(&dev->id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 if (dev->id.hversion_rev < 4) {
948 version = dino_vers[dev->id.hversion_rev];
949 }
950 } else {
951 name = "Cujo";
952 is_cujo = 1;
953 if (dev->id.hversion_rev < 2) {
954 version = cujo_vers[dev->id.hversion_rev];
955 }
956 }
957 }
958
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400959 printk("%s version %s found at 0x%lx\n", name, version, hpa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400961 if (!request_mem_region(hpa, PAGE_SIZE, name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n",
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400963 hpa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 return 1;
965 }
966
967 /* Check for bugs */
968 if (is_cujo && dev->id.hversion_rev == 1) {
969#ifdef CONFIG_IOMMU_CCIO
970 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400971 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400973 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
975 } else {
Matthew Wilcox92b919f2005-10-21 22:38:23 -0400976 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 }
978#endif
979 } else if (!is_cujo && !is_card_dino(&dev->id) &&
980 dev->id.hversion_rev < 3) {
981 printk(KERN_WARNING
982"The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
983"data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n"
984"Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
985"Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
986 dev->id.hversion_rev);
987/* REVISIT: why are C200/C240 listed in the README table but not
988** "Models affected"? Could be an omission in the original literature.
989*/
990 }
991
Helge Dellercb6fc182006-01-17 12:40:40 -0700992 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (!dino_dev) {
994 printk("dino_init_chip - couldn't alloc dino_device\n");
995 return 1;
996 }
997
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 dino_dev->hba.dev = dev;
Helge Deller5076c152006-03-27 12:52:15 -0700999 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */
1001 spin_lock_init(&dino_dev->dinosaur_pen);
1002 dino_dev->hba.iommu = ccio_get_iommu(dev);
1003
1004 if (is_card_dino(&dev->id)) {
1005 dino_card_init(dino_dev);
1006 } else {
1007 dino_bridge_init(dino_dev, name);
1008 }
1009
1010 if (dino_common_init(dev, dino_dev, name))
1011 return 1;
1012
1013 dev->dev.platform_data = dino_dev;
1014
1015 /*
1016 ** It's not used to avoid chicken/egg problems
1017 ** with configuration accessor functions.
1018 */
1019 bus = pci_scan_bus_parented(&dev->dev, dino_current_bus,
1020 &dino_cfg_ops, NULL);
1021 if(bus) {
Rajesh Shahc431ada2005-04-28 00:25:45 -07001022 pci_bus_add_devices(bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 /* This code *depends* on scanning being single threaded
1024 * if it isn't, this global bus number count will fail
1025 */
1026 dino_current_bus = bus->subordinate + 1;
1027 pci_bus_assign_resources(bus);
1028 } else {
1029 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus);
1030 /* increment the bus number in case of duplicates */
1031 dino_current_bus++;
1032 }
1033 dino_dev->hba.hba_bus = bus;
1034 return 0;
1035}
1036
1037/*
1038 * Normally, we would just test sversion. But the Elroy PCI adapter has
1039 * the same sversion as Dino, so we have to check hversion as well.
1040 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
1041 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
1042 * For card-mode Dino, most machines report an sversion of 9D. But 715
1043 * and 725 firmware misreport it as 0x08080 for no adequately explained
1044 * reason.
1045 */
1046static struct parisc_device_id dino_tbl[] = {
1047 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
1048 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
1049 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
1050 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
1051 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
1052 { 0, }
1053};
1054
1055static struct parisc_driver dino_driver = {
Matthew Wilcoxbdad1f82005-10-21 22:36:23 -04001056 .name = "dino",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 .id_table = dino_tbl,
Matthew Wilcoxbdad1f82005-10-21 22:36:23 -04001058 .probe = dino_probe,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059};
1060
1061/*
1062 * One time initialization to let the world know Dino is here.
1063 * This is the only routine which is NOT static.
1064 * Must be called exactly once before pci_init().
1065 */
1066int __init dino_init(void)
1067{
1068 register_parisc_driver(&dino_driver);
1069 return 0;
1070}
1071