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drm/amdgpu: revert "disable bulk moves for now"
[linux-2.6-block.git] / drivers / parisc / dino.c
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2874c5fd 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3** DINO manager
4**
5** (c) Copyright 1999 Red Hat Software
6** (c) Copyright 1999 SuSE GmbH
7** (c) Copyright 1999,2000 Hewlett-Packard Company
8** (c) Copyright 2000 Grant Grundler
544f4485 9** (c) Copyright 2006-2019 Helge Deller
1da177e4 10**
1da177e4
LT		 11**
12** This module provides access to Dino PCI bus (config/IOport spaces)
13** and helps manage Dino IRQ lines.
14**
15** Dino interrupt handling is a bit complicated.
16** Dino always writes to the broadcast EIR via irr0 for now.
17** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!)
18** Only one processor interrupt is used for the 11 IRQ line
19** inputs to dino.
20**
21** The different between Built-in Dino and Card-Mode
22** dino is in chip initialization and pci device initialization.
23**
24** Linux drivers can only use Card-Mode Dino if pci devices I/O port
25** BARs are configured and used by the driver. Programming MMIO address
26** requires substantial knowledge of available Host I/O address ranges
27** is currently not supported. Port/Config accessor functions are the
28** same. "BIOS" differences are handled within the existing routines.
29*/
30
31/* Changes :
32** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr)
33** - added support for the integrated RS232.
34*/
35
36/*
37** TODO: create a virtual address for each Dino HPA.
38** GSC code might be able to do this since IODC data tells us
39** how many pages are used. PCI subsystem could (must?) do this
40** for PCI drivers devices which implement/use MMIO registers.
41*/
42
1da177e4
LT		 43#include <linux/delay.h>
44#include <linux/types.h>
45#include <linux/kernel.h>
46#include <linux/pci.h>
47#include <linux/init.h>
48#include <linux/ioport.h>
49#include <linux/slab.h>
50#include <linux/interrupt.h> /* for struct irqaction */
51#include <linux/spinlock.h> /* for spinlock_t and prototypes */
52
53#include <asm/pdc.h>
54#include <asm/page.h>
1da177e4
LT		 55#include <asm/io.h>
56#include <asm/hardware.h>
57
58#include "gsc.h"
9b8eeab0 59#include "iommu.h"
1da177e4
LT		 60
61#undef DINO_DEBUG
62
63#ifdef DINO_DEBUG
64#define DBG(x...) printk(x)
65#else
66#define DBG(x...)
67#endif
68
69/*
70** Config accessor functions only pass in the 8-bit bus number
71** and not the 8-bit "PCI Segment" number. Each Dino will be
72** assigned a PCI bus number based on "when" it's discovered.
73**
74** The "secondary" bus number is set to this before calling
75** pci_scan_bus(). If any PPB's are present, the scan will
76** discover them and update the "secondary" and "subordinate"
77** fields in Dino's pci_bus structure.
78**
79** Changes in the configuration *will* result in a different
80** bus number for each dino.
81*/
82
f45adcf9
MW		 83#define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA)
84#define is_cujo(id) ((id)->hversion == 0x682)
1da177e4
LT		 85
86#define DINO_IAR0 0x004
87#define DINO_IODC_ADDR 0x008
88#define DINO_IODC_DATA_0 0x008
89#define DINO_IODC_DATA_1 0x008
90#define DINO_IRR0 0x00C
91#define DINO_IAR1 0x010
92#define DINO_IRR1 0x014
93#define DINO_IMR 0x018
94#define DINO_IPR 0x01C
95#define DINO_TOC_ADDR 0x020
96#define DINO_ICR 0x024
97#define DINO_ILR 0x028
98#define DINO_IO_COMMAND 0x030
99#define DINO_IO_STATUS 0x034
100#define DINO_IO_CONTROL 0x038
101#define DINO_IO_GSC_ERR_RESP 0x040
102#define DINO_IO_ERR_INFO 0x044
103#define DINO_IO_PCI_ERR_RESP 0x048
104#define DINO_IO_FBB_EN 0x05c
105#define DINO_IO_ADDR_EN 0x060
106#define DINO_PCI_ADDR 0x064
107#define DINO_CONFIG_DATA 0x068
108#define DINO_IO_DATA 0x06c
109#define DINO_MEM_DATA 0x070 /* Dino 3.x only */
110#define DINO_GSC2X_CONFIG 0x7b4
111#define DINO_GMASK 0x800
112#define DINO_PAMR 0x804
113#define DINO_PAPR 0x808
114#define DINO_DAMODE 0x80c
115#define DINO_PCICMD 0x810
116#define DINO_PCISTS 0x814
117#define DINO_MLTIM 0x81c
118#define DINO_BRDG_FEAT 0x820
119#define DINO_PCIROR 0x824
120#define DINO_PCIWOR 0x828
121#define DINO_TLTIM 0x830
122
123#define DINO_IRQS 11 /* bits 0-10 are architected */
124#define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
4d64c9f5 125#define DINO_LOCAL_IRQS (DINO_IRQS+1)
1da177e4
LT		 126
127#define DINO_MASK_IRQ(x) (1<<(x))
128
129#define PCIINTA 0x001
130#define PCIINTB 0x002
131#define PCIINTC 0x004
132#define PCIINTD 0x008
133#define PCIINTE 0x010
134#define PCIINTF 0x020
135#define GSCEXTINT 0x040
136/* #define xxx 0x080 - bit 7 is "default" */
137/* #define xxx 0x100 - bit 8 not used */
138/* #define xxx 0x200 - bit 9 not used */
139#define RS232INT 0x400
140
141struct dino_device
142{
143 struct pci_hba_data hba; /* 'C' inheritance - must be first */
144 spinlock_t dinosaur_pen;
145 unsigned long txn_addr; /* EIR addr to generate interrupt */
146 u32 txn_data; /* EIR data assign to each dino */
147 u32 imr; /* IRQ's which are enabled */
4d64c9f5 148 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */
1da177e4
LT		 149#ifdef DINO_DEBUG
150 unsigned int dino_irr0; /* save most recent IRQ line stat */
151#endif
152};
153
e2fcabe0
CH		 154static inline struct dino_device *DINO_DEV(struct pci_hba_data *hba)
155{
156 return container_of(hba, struct dino_device, hba);
157}
1da177e4 158
5fa16591
HD		 159/* Check if PCI device is behind a Card-mode Dino. */
160static int pci_dev_is_behind_card_dino(struct pci_dev *dev)
161{
162 struct dino_device *dino_dev;
163
164 dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge));
165 return is_card_dino(&dino_dev->hba.dev->id);
166}
167
1da177e4
LT		 168/*
169 * Dino Configuration Space Accessor Functions
170 */
171
172#define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos)))
173
174/*
175 * keep the current highest bus count to assist in allocating busses. This
176 * tries to keep a global bus count total so that when we discover an
177 * entirely new bus, it can be given a unique bus number.
178 */
179static int dino_current_bus = 0;
180
181static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where,
182 int size, u32 *val)
183{
184 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
b918c62e 185 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
1da177e4
LT		 186 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
187 void __iomem *base_addr = d->hba.base_addr;
188 unsigned long flags;
189
a8043ecb 190 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
92b919fe 191 size);
1da177e4
LT		 192 spin_lock_irqsave(&d->dinosaur_pen, flags);
193
194 /* tell HW which CFG address */
195 __raw_writel(v, base_addr + DINO_PCI_ADDR);
196
197 /* generate cfg read cycle */
198 if (size == 1) {
199 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3));
200 } else if (size == 2) {
201 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2));
202 } else if (size == 4) {
203 *val = readl(base_addr + DINO_CONFIG_DATA);
204 }
205
206 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
207 return 0;
208}
209
210/*
211 * Dino address stepping "feature":
212 * When address stepping, Dino attempts to drive the bus one cycle too soon
213 * even though the type of cycle (config vs. MMIO) might be different.
214 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping.
215 */
216static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where,
217 int size, u32 val)
218{
219 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge));
b918c62e 220 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
1da177e4
LT		 221 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3);
222 void __iomem *base_addr = d->hba.base_addr;
223 unsigned long flags;
224
a8043ecb 225 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where,
92b919fe 226 size);
1da177e4
LT		 227 spin_lock_irqsave(&d->dinosaur_pen, flags);
228
229 /* avoid address stepping feature */
230 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR);
231 __raw_readl(base_addr + DINO_CONFIG_DATA);
232
233 /* tell HW which CFG address */
234 __raw_writel(v, base_addr + DINO_PCI_ADDR);
235 /* generate cfg read cycle */
236 if (size == 1) {
237 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3));
238 } else if (size == 2) {
239 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2));
240 } else if (size == 4) {
241 writel(val, base_addr + DINO_CONFIG_DATA);
242 }
243
244 spin_unlock_irqrestore(&d->dinosaur_pen, flags);
245 return 0;
246}
247
248static struct pci_ops dino_cfg_ops = {
249 .read = dino_cfg_read,
250 .write = dino_cfg_write,
251};
252
253
254/*
255 * Dino "I/O Port" Space Accessor Functions
256 *
257 * Many PCI devices don't require use of I/O port space (eg Tulip,
258 * NCR720) since they export the same registers to both MMIO and
259 * I/O port space. Performance is going to stink if drivers use
260 * I/O port instead of MMIO.
261 */
262
263#define DINO_PORT_IN(type, size, mask) \
264static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \
265{ \
266 u##size v; \
267 unsigned long flags; \
268 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
269 /* tell HW which IO Port address */ \
270 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
271 /* generate I/O PORT read cycle */ \
272 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \
273 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
274 return v; \
275}
276
277DINO_PORT_IN(b, 8, 3)
278DINO_PORT_IN(w, 16, 2)
279DINO_PORT_IN(l, 32, 0)
280
281#define DINO_PORT_OUT(type, size, mask) \
282static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
283{ \
284 unsigned long flags; \
285 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \
286 /* tell HW which IO port address */ \
287 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \
288 /* generate cfg write cycle */ \
289 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \
290 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \
291}
292
293DINO_PORT_OUT(b, 8, 3)
294DINO_PORT_OUT(w, 16, 2)
295DINO_PORT_OUT(l, 32, 0)
296
df8e5bc6 297static struct pci_port_ops dino_port_ops = {
1da177e4
LT		 298 .inb = dino_in8,
299 .inw = dino_in16,
300 .inl = dino_in32,
301 .outb = dino_out8,
302 .outw = dino_out16,
303 .outl = dino_out32
304};
305
4c4231ea 306static void dino_mask_irq(struct irq_data *d)
1da177e4 307{
4c4231ea
TG		 308 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
309 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
1da177e4 310
04903c06 311 DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq);
1da177e4
LT		 312
313 /* Clear the matching bit in the IMR register */
314 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq));
315 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
316}
317
4c4231ea 318static void dino_unmask_irq(struct irq_data *d)
1da177e4 319{
4c4231ea
TG		 320 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d);
321 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS);
1da177e4
LT		 322 u32 tmp;
323
04903c06 324 DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq);
1da177e4
LT		 325
326 /*
327 ** clear pending IRQ bits
328 **
329 ** This does NOT change ILR state!
330 ** See comment below for ILR usage.
331 */
332 __raw_readl(dino_dev->hba.base_addr+DINO_IPR);
333
334 /* set the matching bit in the IMR register */
335 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */
336 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR);
337
338 /* Emulate "Level Triggered" Interrupt
339 ** Basically, a driver is blowing it if the IRQ line is asserted
340 ** while the IRQ is disabled. But tulip.c seems to do that....
341 ** Give 'em a kluge award and a nice round of applause!
342 **
343 ** The gsc_write will generate an interrupt which invokes dino_isr().
344 ** dino_isr() will read IPR and find nothing. But then catch this
345 ** when it also checks ILR.
346 */
347 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR);
348 if (tmp & DINO_MASK_IRQ(local_irq)) {
349 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n",
a8043ecb 350 __func__, tmp);
1da177e4
LT		 351 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr);
352 }
353}
354
dfe07565 355static struct irq_chip dino_interrupt_type = {
4c4231ea
TG		 356 .name = "GSC-PCI",
357 .irq_unmask = dino_unmask_irq,
358 .irq_mask = dino_mask_irq,
1da177e4
LT		 359};
360
361
362/*
363 * Handle a Processor interrupt generated by Dino.
364 *
365 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from
366 * wedging the CPU. Could be removed or made optional at some point.
367 */
7d12e780 368static irqreturn_t dino_isr(int irq, void *intr_dev)
1da177e4
LT		 369{
370 struct dino_device *dino_dev = intr_dev;
371 u32 mask;
372 int ilr_loop = 100;
373
374 /* read and acknowledge pending interrupts */
375#ifdef DINO_DEBUG
376 dino_dev->dino_irr0 =
377#endif
378 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK;
379
380 if (mask == 0)
381 return IRQ_NONE;
382
383ilr_again:
384 do {
385 int local_irq = __ffs(mask);
386 int irq = dino_dev->global_irq[local_irq];
387 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n",
a8043ecb 388 __func__, irq, intr_dev, mask);
ba20085c 389 generic_handle_irq(irq);
35d8be9c 390 mask &= ~DINO_MASK_IRQ(local_irq);
1da177e4
LT		 391 } while (mask);
392
393 /* Support for level triggered IRQ lines.
394 **
395 ** Dropping this support would make this routine *much* faster.
396 ** But since PCI requires level triggered IRQ line to share lines...
397 ** device drivers may assume lines are level triggered (and not
398 ** edge triggered like EISA/ISA can be).
399 */
400 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr;
401 if (mask) {
402 if (--ilr_loop > 0)
403 goto ilr_again;
2e37787d 404 pr_warn_ratelimited("Dino 0x%px: stuck interrupt %d\n",
1da177e4 405 dino_dev->hba.base_addr, mask);
1da177e4
LT		 406 }
407 return IRQ_HANDLED;
408}
409
410static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp)
411{
412 int irq = gsc_assign_irq(&dino_interrupt_type, dino);
413 if (irq == NO_IRQ)
414 return;
415
416 *irqp = irq;
417 dino->global_irq[local_irq] = irq;
418}
419
420static void dino_choose_irq(struct parisc_device *dev, void *ctrl)
421{
422 int irq;
423 struct dino_device *dino = ctrl;
424
425 switch (dev->id.sversion) {
426 case 0x00084: irq = 8; break; /* PS/2 */
427 case 0x0008c: irq = 10; break; /* RS232 */
428 case 0x00096: irq = 8; break; /* PS/2 */
429 default: return; /* Unknown */
430 }
431
432 dino_assign_irq(dino, irq, &dev->irq);
433}
434
04d35d73
HD		 435
436/*
437 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de)
438 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...)
439 */
0fe763c5 440static void quirk_cirrus_cardbus(struct pci_dev *dev)
04d35d73
HD		 441{
442 u8 new_irq = dev->irq - 1;
443 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n",
444 pci_name(dev), dev->irq, new_irq);
445 dev->irq = new_irq;
446}
447DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus );
448
5fa16591
HD		 449#ifdef CONFIG_TULIP
450static void pci_fixup_tulip(struct pci_dev *dev)
451{
452 if (!pci_dev_is_behind_card_dino(dev))
453 return;
454 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM))
455 return;
456 pr_warn("%s: HP HSC-PCI Cards with card-mode Dino not yet supported.\n",
457 pci_name(dev));
458 /* Disable this card by zeroing the PCI resources */
459 memset(&dev->resource[0], 0, sizeof(dev->resource[0]));
460 memset(&dev->resource[1], 0, sizeof(dev->resource[1]));
461}
462DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_DEC, PCI_ANY_ID, pci_fixup_tulip);
463#endif /* CONFIG_TULIP */
04d35d73 464
1da177e4
LT		 465static void __init
466dino_bios_init(void)
467{
468 DBG("dino_bios_init\n");
469}
470
471/*
472 * dino_card_setup - Set up the memory space for a Dino in card mode.
473 * @bus: the bus under this dino
474 *
475 * Claim an 8MB chunk of unused IO space and call the generic PCI routines
476 * to set up the addresses of the devices on this bus.
477 */
478#define _8MB 0x00800000UL
479static void __init
480dino_card_setup(struct pci_bus *bus, void __iomem *base_addr)
481{
482 int i;
483 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
484 struct resource *res;
485 char name[128];
486 int size;
487
488 res = &dino_dev->hba.lmmio_space;
489 res->flags = IORESOURCE_MEM;
490 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)",
d4995244 491 dev_name(bus->bridge));
1da177e4
LT		 492 res->name = kmalloc(size+1, GFP_KERNEL);
493 if(res->name)
494 strcpy((char *)res->name, name);
495 else
496 res->name = dino_dev->hba.lmmio_space.name;
497
498
499 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB,
500 F_EXTEND(0xf0000000UL) | _8MB,
501 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) {
0b79ca2a 502 struct pci_dev *dev, *tmp;
1da177e4
LT		 503
504 printk(KERN_ERR "Dino: cannot attach bus %s\n",
d4995244 505 dev_name(bus->bridge));
1da177e4 506 /* kill the bus, we can't do anything with it */
0b79ca2a 507 list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) {
1da177e4
LT		 508 list_del(&dev->bus_list);
509 }
510
511 return;
512 }
513 bus->resource[1] = res;
514 bus->resource[0] = &(dino_dev->hba.io_space);
515
516 /* Now tell dino what range it has */
517 for (i = 1; i < 31; i++) {
518 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB)))
519 break;
520 }
92b919fe 521 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n",
1da177e4
LT		 522 i, res->start, base_addr + DINO_IO_ADDR_EN);
523 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN);
524}
525
526static void __init
527dino_card_fixup(struct pci_dev *dev)
528{
529 u32 irq_pin;
530
531 /*
532 ** REVISIT: card-mode PCI-PCI expansion chassis do exist.
533 ** Not sure they were ever productized.
534 ** Die here since we'll die later in dino_inb() anyway.
535 */
536 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
537 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n");
538 }
539
540 /*
541 ** Set Latency Timer to 0xff (not a shared bus)
542 ** Set CACHELINE_SIZE.
543 */
544 dino_cfg_write(dev->bus, dev->devfn,
545 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4);
546
547 /*
548 ** Program INT_LINE for card-mode devices.
549 ** The cards are hardwired according to this algorithm.
550 ** And it doesn't matter if PPB's are present or not since
551 ** the IRQ lines bypass the PPB.
552 **
553 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range.
554 ** The additional "-1" adjusts for skewing the IRQ<->slot.
555 */
556 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin);
f0e88af8 557 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
1da177e4
LT		 558
559 /* Shouldn't really need to do this but it's in case someone tries
560 ** to bypass PCI services and look at the card themselves.
561 */
562 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq);
563}
564
565/* The alignment contraints for PCI bridges under dino */
566#define DINO_BRIDGE_ALIGN 0x100000
567
568
569static void __init
570dino_fixup_bus(struct pci_bus *bus)
571{
1da177e4
LT		 572 struct pci_dev *dev;
573 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge));
1da177e4 574
04903c06 575 DBG(KERN_WARNING "%s(0x%px) bus %d platform_data 0x%px\n",
b918c62e 576 __func__, bus, bus->busn_res.start,
1da177e4
LT		 577 bus->bridge->platform_data);
578
579 /* Firmware doesn't set up card-mode dino, so we have to */
580 if (is_card_dino(&dino_dev->hba.dev->id)) {
581 dino_card_setup(bus, dino_dev->hba.base_addr);
9785d646 582 } else if (bus->parent) {
1da177e4
LT		 583 int i;
584
237865f1
BH		 585 pci_read_bridge_bases(bus);
586
587
1da177e4
LT		 588 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) {
589 if((bus->self->resource[i].flags &
590 (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
591 continue;
592
593 if(bus->self->resource[i].flags & IORESOURCE_MEM) {
594 /* There's a quirk to alignment of
595 * bridge memory resources: the start
596 * is the alignment and start-end is
597 * the size. However, firmware will
598 * have assigned start and end, so we
599 * need to take this into account */
600 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN;
601 bus->self->resource[i].start = DINO_BRIDGE_ALIGN;
602
603 }
604
3fad9b8d 605 DBG("DEBUG %s assigning %d [%pR]\n",
d4995244 606 dev_name(&bus->self->dev), i,
3fad9b8d 607 &bus->self->resource[i]);
1e0deabd 608 WARN_ON(pci_assign_resource(bus->self, i));
3fad9b8d 609 DBG("DEBUG %s after assign %d [%pR]\n",
d4995244 610 dev_name(&bus->self->dev), i,
3fad9b8d 611 &bus->self->resource[i]);
1da177e4
LT		 612 }
613 }
614
615
0b79ca2a 616 list_for_each_entry(dev, &bus->devices, bus_list) {
1da177e4
LT		 617 if (is_card_dino(&dino_dev->hba.dev->id))
618 dino_card_fixup(dev);
619
620 /*
621 ** P2PB's only have 2 BARs, no IRQs.
622 ** I'd like to just ignore them for now.
623 */
602c9c9a
HD		 624 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
625 pcibios_init_bridge(dev);
1da177e4 626 continue;
602c9c9a 627 }
1da177e4 628
1da177e4
LT		 629 /* null out the ROM resource if there is one (we don't
630 * care about an expansion rom on parisc, since it
631 * usually contains (x86) bios code) */
632 dev->resource[PCI_ROM_RESOURCE].flags = 0;
633
634 if(dev->irq == 255) {
635
636#define DINO_FIX_UNASSIGNED_INTERRUPTS
637#ifdef DINO_FIX_UNASSIGNED_INTERRUPTS
638
639 /* This code tries to assign an unassigned
640 * interrupt. Leave it disabled unless you
641 * *really* know what you're doing since the
642 * pin<->interrupt line mapping varies by bus
643 * and machine */
644
645 u32 irq_pin;
646
647 dino_cfg_read(dev->bus, dev->devfn,
648 PCI_INTERRUPT_PIN, 1, &irq_pin);
f0e88af8 649 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1;
1da177e4
LT		 650 printk(KERN_WARNING "Device %s has undefined IRQ, "
651 "setting to %d\n", pci_name(dev), irq_pin);
652 dino_cfg_write(dev->bus, dev->devfn,
653 PCI_INTERRUPT_LINE, 1, irq_pin);
654 dino_assign_irq(dino_dev, irq_pin, &dev->irq);
655#else
656 dev->irq = 65535;
657 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev));
658#endif
659 } else {
1da177e4
LT		 660 /* Adjust INT_LINE for that busses region */
661 dino_assign_irq(dino_dev, dev->irq, &dev->irq);
662 }
663 }
664}
665
666
df8e5bc6 667static struct pci_bios_ops dino_bios_ops = {
1da177e4
LT		 668 .init = dino_bios_init,
669 .fixup_bus = dino_fixup_bus
670};
671
672
673/*
674 * Initialise a DINO controller chip
675 */
676static void __init
677dino_card_init(struct dino_device *dino_dev)
678{
679 u32 brdg_feat = 0x00784e05;
92b919fe
MW		 680 unsigned long status;
681
682 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS);
683 if (status & 0x0000ff80) {
684 __raw_writel(0x00000005,
685 dino_dev->hba.base_addr+DINO_IO_COMMAND);
686 udelay(1);
687 }
1da177e4
LT		 688
689 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK);
690 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN);
691 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR);
692
693#if 1
694/* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */
695 /*
696 ** PCX-L processors don't support XQL like Dino wants it.
697 ** PCX-L2 ignore XQL signal and it doesn't matter.
698 */
699 brdg_feat &= ~0x4; /* UXQL */
700#endif
701 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT);
702
703 /*
704 ** Don't enable address decoding until we know which I/O range
705 ** currently is available from the host. Only affects MMIO
706 ** and not I/O port space.
707 */
708 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN);
709
710 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE);
711 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
712 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);
713
714 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
715 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
716 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);
717
718 /* Disable PAMR before writing PAPR */
719 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
720 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
721 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);
722
723 /*
724 ** Dino ERS encourages enabling FBB (0x6f).
725 ** We can't until we know *all* devices below us can support it.
726 ** (Something in device configuration header tells us).
727 */
728 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);
729
730 /* Somewhere, the PCI spec says give devices 1 second
731 ** to recover from the #RESET being de-asserted.
732 ** Experience shows most devices only need 10ms.
733 ** This short-cut speeds up booting significantly.
734 */
735 mdelay(pci_post_reset_delay);
736}
737
738static int __init
739dino_bridge_init(struct dino_device *dino_dev, const char *name)
740{
741 unsigned long io_addr;
742 int result, i, count=0;
743 struct resource *res, *prevres = NULL;
744 /*
745 * Decoding IO_ADDR_EN only works for Built-in Dino
746 * since PDC has already initialized this.
747 */
748
749 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
750 if (io_addr == 0) {
751 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
752 return -ENODEV;
753 }
754
755 res = &dino_dev->hba.lmmio_space;
756 for (i = 0; i < 32; i++) {
757 unsigned long start, end;
758
759 if((io_addr & (1 << i)) == 0)
760 continue;
761
5076c158 762 start = F_EXTEND(0xf0000000UL) | (i << 23);
1da177e4
LT		 763 end = start + 8 * 1024 * 1024 - 1;
764
765 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
766 start, end);
767
768 if(prevres && prevres->end + 1 == start) {
769 prevres->end = end;
770 } else {
771 if(count >= DINO_MAX_LMMIO_RESOURCES) {
772 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
773 break;
774 }
775 prevres = res;
776 res->start = start;
777 res->end = end;
778 res->flags = IORESOURCE_MEM;
779 res->name = kmalloc(64, GFP_KERNEL);
780 if(res->name)
781 snprintf((char *)res->name, 64, "%s LMMIO %d",
782 name, count);
783 res++;
784 count++;
785 }
786 }
787
788 res = &dino_dev->hba.lmmio_space;
789
790 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
791 if(res[i].flags == 0)
792 break;
793
794 result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
795 if (result < 0) {
c18b4608 796 printk(KERN_ERR "%s: failed to claim PCI Bus address "
3fad9b8d 797 "space %d (%pR)!\n", name, i, &res[i]);
1da177e4
LT		 798 return result;
799 }
800 }
801 return 0;
802}
803
804static int __init dino_common_init(struct parisc_device *dev,
805 struct dino_device *dino_dev, const char *name)
806{
807 int status;
808 u32 eim;
809 struct gsc_irq gsc_irq;
810 struct resource *res;
811
812 pcibios_register_hba(&dino_dev->hba);
813
814 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */
815 pci_port = &dino_port_ops;
816
817 /*
818 ** Note: SMP systems can make use of IRR1/IAR1 registers
819 ** But it won't buy much performance except in very
820 ** specific applications/configurations. Note Dino
821 ** still only has 11 IRQ input lines - just map some of them
822 ** to a different processor.
823 */
824 dev->irq = gsc_alloc_irq(&gsc_irq);
825 dino_dev->txn_addr = gsc_irq.txn_addr;
826 dino_dev->txn_data = gsc_irq.txn_data;
827 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
828
829 /*
830 ** Dino needs a PA "IRQ" to get a processor's attention.
831 ** arch/parisc/kernel/irq.c returns an EIRR bit.
832 */
833 if (dev->irq < 0) {
834 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
835 return 1;
836 }
837
838 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev);
839 if (status) {
840 printk(KERN_WARNING "%s: request_irq() failed with %d\n",
841 name, status);
842 return 1;
843 }
844
845 /* Support the serial port which is sometimes attached on built-in
846 * Dino / Cujo chips.
847 */
848
849 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq);
850
851 /*
852 ** This enables DINO to generate interrupts when it sees
853 ** any of its inputs *change*. Just asserting an IRQ
854 ** before it's enabled (ie unmasked) isn't good enough.
855 */
856 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);
857
858 /*
859 ** Some platforms don't clear Dino's IRR0 register at boot time.
860 ** Reading will clear it now.
861 */
862 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0);
863
864 /* allocate I/O Port resource region */
865 res = &dino_dev->hba.io_space;
f45adcf9 866 if (!is_cujo(&dev->id)) {
1da177e4
LT		 867 res->name = "Dino I/O Port";
868 } else {
869 res->name = "Cujo I/O Port";
870 }
871 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
872 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
873 res->flags = IORESOURCE_IO; /* do not mark it busy ! */
874 if (request_resource(&ioport_resource, res) < 0) {
875 printk(KERN_ERR "%s: request I/O Port region failed "
04903c06 876 "0x%lx/%lx (hpa 0x%px)\n",
c18b4608
AB		 877 name, (unsigned long)res->start, (unsigned long)res->end,
878 dino_dev->hba.base_addr);
1da177e4
LT		 879 return 1;
880 }
881
882 return 0;
883}
884
885#define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL)
886#define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL)
887#define CUJO_RAVEN_BADPAGE 0x01003000UL
888#define CUJO_FIREHAWK_BADPAGE 0x01607000UL
889
544f4485 890static const char dino_vers[][4] = {
1da177e4
LT		 891 "2.0",
892 "2.1",
893 "3.0",
894 "3.1"
895};
896
544f4485 897static const char cujo_vers[][4] = {
1da177e4
LT		 898 "1.0",
899 "2.0"
900};
901
902void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);
903
904/*
905** Determine if dino should claim this chip (return 0) or not (return 1).
906** If so, initialize the chip appropriately (card-mode vs bridge mode).
907** Much of the initialization is common though.
908*/
53f01bba 909static int __init dino_probe(struct parisc_device *dev)
1da177e4
LT		 910{
911 struct dino_device *dino_dev; // Dino specific control struct
912 const char *version = "unknown";
913 char *name;
914 int is_cujo = 0;
7590e500 915 LIST_HEAD(resources);
1da177e4 916 struct pci_bus *bus;
53f01bba 917 unsigned long hpa = dev->hpa.start;
30aa80da 918 int max;
53f01bba 919
1da177e4
LT		 920 name = "Dino";
921 if (is_card_dino(&dev->id)) {
922 version = "3.x (card mode)";
923 } else {
f45adcf9 924 if (!is_cujo(&dev->id)) {
1da177e4
LT		 925 if (dev->id.hversion_rev < 4) {
926 version = dino_vers[dev->id.hversion_rev];
927 }
928 } else {
929 name = "Cujo";
930 is_cujo = 1;
931 if (dev->id.hversion_rev < 2) {
932 version = cujo_vers[dev->id.hversion_rev];
933 }
934 }
935 }
936
92b919fe 937 printk("%s version %s found at 0x%lx\n", name, version, hpa);
1da177e4 938
92b919fe 939 if (!request_mem_region(hpa, PAGE_SIZE, name)) {
3335f75a 940 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n",
92b919fe 941 hpa);
1da177e4
LT		 942 return 1;
943 }
944
945 /* Check for bugs */
946 if (is_cujo && dev->id.hversion_rev == 1) {
947#ifdef CONFIG_IOMMU_CCIO
948 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
92b919fe 949 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) {
1da177e4 950 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE);
92b919fe 951 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
1da177e4
LT		 952 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE);
953 } else {
92b919fe 954 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa);
1da177e4
LT		 955 }
956#endif
957 } else if (!is_cujo && !is_card_dino(&dev->id) &&
958 dev->id.hversion_rev < 3) {
959 printk(KERN_WARNING
960"The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
961"data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n"
962"Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
963"Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
964 dev->id.hversion_rev);
965/* REVISIT: why are C200/C240 listed in the README table but not
966** "Models affected"? Could be an omission in the original literature.
967*/
968 }
969
cb6fc18e 970 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL);
1da177e4
LT		 971 if (!dino_dev) {
972 printk("dino_init_chip - couldn't alloc dino_device\n");
973 return 1;
974 }
975
1da177e4 976 dino_dev->hba.dev = dev;
5076c158 977 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096);
40981160 978 dino_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
1da177e4
LT		 979 spin_lock_init(&dino_dev->dinosaur_pen);
980 dino_dev->hba.iommu = ccio_get_iommu(dev);
981
982 if (is_card_dino(&dev->id)) {
983 dino_card_init(dino_dev);
984 } else {
985 dino_bridge_init(dino_dev, name);
986 }
987
988 if (dino_common_init(dev, dino_dev, name))
989 return 1;
990
991 dev->dev.platform_data = dino_dev;
992
39c2462e
BH		 993 pci_add_resource_offset(&resources, &dino_dev->hba.io_space,
994 HBA_PORT_BASE(dino_dev->hba.hba_num));
7590e500 995 if (dino_dev->hba.lmmio_space.flags)
39c2462e
BH		 996 pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space,
997 dino_dev->hba.lmmio_space_offset);
7590e500 998 if (dino_dev->hba.elmmio_space.flags)
39c2462e
BH		 999 pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space,
1000 dino_dev->hba.lmmio_space_offset);
7590e500
BH		 1001 if (dino_dev->hba.gmmio_space.flags)
1002 pci_add_resource(&resources, &dino_dev->hba.gmmio_space);
1003
30aa80da
YL		 1004 dino_dev->hba.bus_num.start = dino_current_bus;
1005 dino_dev->hba.bus_num.end = 255;
1006 dino_dev->hba.bus_num.flags = IORESOURCE_BUS;
1007 pci_add_resource(&resources, &dino_dev->hba.bus_num);
1da177e4
LT		 1008 /*
1009 ** It's not used to avoid chicken/egg problems
1010 ** with configuration accessor functions.
1011 */
7590e500
BH		 1012 dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev,
1013 dino_current_bus, &dino_cfg_ops, NULL, &resources);
c4e06576 1014 if (!bus) {
fed99b1e 1015 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n",
d4995244 1016 dev_name(&dev->dev), dino_current_bus);
7590e500 1017 pci_free_resource_list(&resources);
1da177e4
LT		 1018 /* increment the bus number in case of duplicates */
1019 dino_current_bus++;
c4e06576 1020 return 0;
1da177e4 1021 }
c4e06576 1022
30aa80da
YL		 1023 max = pci_scan_child_bus(bus);
1024 pci_bus_update_busn_res_end(bus, max);
c4e06576
BH		 1025
1026 /* This code *depends* on scanning being single threaded
1027 * if it isn't, this global bus number count will fail
1028 */
30aa80da 1029 dino_current_bus = max + 1;
c4e06576
BH		 1030 pci_bus_assign_resources(bus);
1031 pci_bus_add_devices(bus);
1da177e4
LT		 1032 return 0;
1033}
1034
1035/*
1036 * Normally, we would just test sversion. But the Elroy PCI adapter has
1037 * the same sversion as Dino, so we have to check hversion as well.
1038 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
1039 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
1040 * For card-mode Dino, most machines report an sversion of 9D. But 715
1041 * and 725 firmware misreport it as 0x08080 for no adequately explained
1042 * reason.
1043 */
cfe4fbfb 1044static const struct parisc_device_id dino_tbl[] __initconst = {
1da177e4
LT		 1045 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
1046 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
1047 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
1048 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
1049 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
1050 { 0, }
1051};
1052
cfe4fbfb 1053static struct parisc_driver dino_driver __refdata = {
bdad1f83 1054 .name = "dino",
1da177e4 1055 .id_table = dino_tbl,
bdad1f83 1056 .probe = dino_probe,
1da177e4
LT		 1057};
1058
1059/*
1060 * One time initialization to let the world know Dino is here.
1061 * This is the only routine which is NOT static.
1062 * Must be called exactly once before pci_init().
1063 */
1064int __init dino_init(void)
1065{
1066 register_parisc_driver(&dino_driver);
1067 return 0;
1068}
1069
Linux 6.x block layer and io_uring tree(s)