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1da177e4 LT |
1 | /* |
2 | * pcic.c: MicroSPARC-IIep PCI controller support | |
3 | * | |
4 | * Copyright (C) 1998 V. Roganov and G. Raiko | |
5 | * | |
6 | * Code is derived from Ultra/PCI PSYCHO controller support, see that | |
7 | * for author info. | |
8 | * | |
9 | * Support for diverse IIep based platforms by Pete Zaitcev. | |
10 | * CP-1200 by Eric Brower. | |
11 | */ | |
12 | ||
13 | #include <linux/config.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/mm.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/jiffies.h> | |
20 | ||
21 | #include <asm/ebus.h> | |
22 | #include <asm/sbus.h> /* for sanity check... */ | |
23 | #include <asm/swift.h> /* for cache flushing. */ | |
24 | #include <asm/io.h> | |
25 | ||
26 | #include <linux/ctype.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/time.h> | |
29 | #include <linux/timex.h> | |
30 | #include <linux/interrupt.h> | |
31 | ||
32 | #include <asm/irq.h> | |
33 | #include <asm/oplib.h> | |
34 | #include <asm/pcic.h> | |
35 | #include <asm/timer.h> | |
36 | #include <asm/uaccess.h> | |
37 | ||
38 | ||
39 | unsigned int pcic_pin_to_irq(unsigned int pin, char *name); | |
40 | ||
41 | /* | |
42 | * I studied different documents and many live PROMs both from 2.30 | |
43 | * family and 3.xx versions. I came to the amazing conclusion: there is | |
44 | * absolutely no way to route interrupts in IIep systems relying on | |
45 | * information which PROM presents. We must hardcode interrupt routing | |
46 | * schematics. And this actually sucks. -- zaitcev 1999/05/12 | |
47 | * | |
48 | * To find irq for a device we determine which routing map | |
49 | * is in effect or, in other words, on which machine we are running. | |
50 | * We use PROM name for this although other techniques may be used | |
51 | * in special cases (Gleb reports a PROMless IIep based system). | |
52 | * Once we know the map we take device configuration address and | |
53 | * find PCIC pin number where INT line goes. Then we may either program | |
54 | * preferred irq into the PCIC or supply the preexisting irq to the device. | |
55 | */ | |
56 | struct pcic_ca2irq { | |
57 | unsigned char busno; /* PCI bus number */ | |
58 | unsigned char devfn; /* Configuration address */ | |
59 | unsigned char pin; /* PCIC external interrupt pin */ | |
60 | unsigned char irq; /* Preferred IRQ (mappable in PCIC) */ | |
61 | unsigned int force; /* Enforce preferred IRQ */ | |
62 | }; | |
63 | ||
64 | struct pcic_sn2list { | |
65 | char *sysname; | |
66 | struct pcic_ca2irq *intmap; | |
67 | int mapdim; | |
68 | }; | |
69 | ||
70 | /* | |
71 | * JavaEngine-1 apparently has different versions. | |
72 | * | |
73 | * According to communications with Sun folks, for P2 build 501-4628-03: | |
74 | * pin 0 - parallel, audio; | |
75 | * pin 1 - Ethernet; | |
76 | * pin 2 - su; | |
77 | * pin 3 - PS/2 kbd and mouse. | |
78 | * | |
79 | * OEM manual (805-1486): | |
80 | * pin 0: Ethernet | |
81 | * pin 1: All EBus | |
82 | * pin 2: IGA (unused) | |
83 | * pin 3: Not connected | |
84 | * OEM manual says that 501-4628 & 501-4811 are the same thing, | |
85 | * only the latter has NAND flash in place. | |
86 | * | |
87 | * So far unofficial Sun wins over the OEM manual. Poor OEMs... | |
88 | */ | |
89 | static struct pcic_ca2irq pcic_i_je1a[] = { /* 501-4811-03 */ | |
90 | { 0, 0x00, 2, 12, 0 }, /* EBus: hogs all */ | |
91 | { 0, 0x01, 1, 6, 1 }, /* Happy Meal */ | |
92 | { 0, 0x80, 0, 7, 0 }, /* IGA (unused) */ | |
93 | }; | |
94 | ||
95 | /* XXX JS-E entry is incomplete - PCI Slot 2 address (pin 7)? */ | |
96 | static struct pcic_ca2irq pcic_i_jse[] = { | |
97 | { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */ | |
98 | { 0, 0x01, 1, 6, 0 }, /* hme */ | |
99 | { 0, 0x08, 2, 9, 0 }, /* VGA - we hope not used :) */ | |
100 | { 0, 0x10, 6, 8, 0 }, /* PCI INTA# in Slot 1 */ | |
101 | { 0, 0x18, 7, 12, 0 }, /* PCI INTA# in Slot 2, shared w. RTC */ | |
102 | { 0, 0x38, 4, 9, 0 }, /* All ISA devices. Read 8259. */ | |
103 | { 0, 0x80, 5, 11, 0 }, /* EIDE */ | |
104 | /* {0,0x88, 0,0,0} - unknown device... PMU? Probably no interrupt. */ | |
105 | { 0, 0xA0, 4, 9, 0 }, /* USB */ | |
106 | /* | |
107 | * Some pins belong to non-PCI devices, we hardcode them in drivers. | |
108 | * sun4m timers - irq 10, 14 | |
109 | * PC style RTC - pin 7, irq 4 ? | |
110 | * Smart card, Parallel - pin 4 shared with USB, ISA | |
111 | * audio - pin 3, irq 5 ? | |
112 | */ | |
113 | }; | |
114 | ||
115 | /* SPARCengine-6 was the original release name of CP1200. | |
116 | * The documentation differs between the two versions | |
117 | */ | |
118 | static struct pcic_ca2irq pcic_i_se6[] = { | |
119 | { 0, 0x08, 0, 2, 0 }, /* SCSI */ | |
120 | { 0, 0x01, 1, 6, 0 }, /* HME */ | |
121 | { 0, 0x00, 3, 13, 0 }, /* EBus */ | |
122 | }; | |
123 | ||
124 | /* | |
125 | * Krups (courtesy of Varol Kaptan) | |
126 | * No documentation available, but it was easy to guess | |
127 | * because it was very similar to Espresso. | |
128 | * | |
129 | * pin 0 - kbd, mouse, serial; | |
130 | * pin 1 - Ethernet; | |
131 | * pin 2 - igs (we do not use it); | |
132 | * pin 3 - audio; | |
133 | * pin 4,5,6 - unused; | |
134 | * pin 7 - RTC (from P2 onwards as David B. says). | |
135 | */ | |
136 | static struct pcic_ca2irq pcic_i_jk[] = { | |
137 | { 0, 0x00, 0, 13, 0 }, /* Ebus - serial and keyboard */ | |
138 | { 0, 0x01, 1, 6, 0 }, /* hme */ | |
139 | }; | |
140 | ||
141 | /* | |
142 | * Several entries in this list may point to the same routing map | |
143 | * as several PROMs may be installed on the same physical board. | |
144 | */ | |
145 | #define SN2L_INIT(name, map) \ | |
146 | { name, map, sizeof(map)/sizeof(struct pcic_ca2irq) } | |
147 | ||
148 | static struct pcic_sn2list pcic_known_sysnames[] = { | |
149 | SN2L_INIT("SUNW,JavaEngine1", pcic_i_je1a), /* JE1, PROM 2.32 */ | |
150 | SN2L_INIT("SUNW,JS-E", pcic_i_jse), /* PROLL JavaStation-E */ | |
151 | SN2L_INIT("SUNW,SPARCengine-6", pcic_i_se6), /* SPARCengine-6/CP-1200 */ | |
152 | SN2L_INIT("SUNW,JS-NC", pcic_i_jk), /* PROLL JavaStation-NC */ | |
153 | SN2L_INIT("SUNW,JSIIep", pcic_i_jk), /* OBP JavaStation-NC */ | |
154 | { NULL, NULL, 0 } | |
155 | }; | |
156 | ||
157 | /* | |
158 | * Only one PCIC per IIep, | |
159 | * and since we have no SMP IIep, only one per system. | |
160 | */ | |
161 | static int pcic0_up; | |
162 | static struct linux_pcic pcic0; | |
163 | ||
164 | void * __iomem pcic_regs; | |
165 | volatile int pcic_speculative; | |
166 | volatile int pcic_trapped; | |
167 | ||
168 | static void pci_do_gettimeofday(struct timeval *tv); | |
169 | static int pci_do_settimeofday(struct timespec *tv); | |
170 | ||
171 | #define CONFIG_CMD(bus, device_fn, where) (0x80000000 | (((unsigned int)bus) << 16) | (((unsigned int)device_fn) << 8) | (where & ~3)) | |
172 | ||
173 | static int pcic_read_config_dword(unsigned int busno, unsigned int devfn, | |
174 | int where, u32 *value) | |
175 | { | |
176 | struct linux_pcic *pcic; | |
177 | unsigned long flags; | |
178 | ||
179 | pcic = &pcic0; | |
180 | ||
181 | local_irq_save(flags); | |
182 | #if 0 /* does not fail here */ | |
183 | pcic_speculative = 1; | |
184 | pcic_trapped = 0; | |
185 | #endif | |
186 | writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr); | |
187 | #if 0 /* does not fail here */ | |
188 | nop(); | |
189 | if (pcic_trapped) { | |
190 | local_irq_restore(flags); | |
191 | *value = ~0; | |
192 | return 0; | |
193 | } | |
194 | #endif | |
195 | pcic_speculative = 2; | |
196 | pcic_trapped = 0; | |
197 | *value = readl(pcic->pcic_config_space_data + (where&4)); | |
198 | nop(); | |
199 | if (pcic_trapped) { | |
200 | pcic_speculative = 0; | |
201 | local_irq_restore(flags); | |
202 | *value = ~0; | |
203 | return 0; | |
204 | } | |
205 | pcic_speculative = 0; | |
206 | local_irq_restore(flags); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | static int pcic_read_config(struct pci_bus *bus, unsigned int devfn, | |
211 | int where, int size, u32 *val) | |
212 | { | |
213 | unsigned int v; | |
214 | ||
215 | if (bus->number != 0) return -EINVAL; | |
216 | switch (size) { | |
217 | case 1: | |
218 | pcic_read_config_dword(bus->number, devfn, where&~3, &v); | |
219 | *val = 0xff & (v >> (8*(where & 3))); | |
220 | return 0; | |
221 | case 2: | |
222 | if (where&1) return -EINVAL; | |
223 | pcic_read_config_dword(bus->number, devfn, where&~3, &v); | |
224 | *val = 0xffff & (v >> (8*(where & 3))); | |
225 | return 0; | |
226 | case 4: | |
227 | if (where&3) return -EINVAL; | |
228 | pcic_read_config_dword(bus->number, devfn, where&~3, val); | |
229 | return 0; | |
230 | } | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
234 | static int pcic_write_config_dword(unsigned int busno, unsigned int devfn, | |
235 | int where, u32 value) | |
236 | { | |
237 | struct linux_pcic *pcic; | |
238 | unsigned long flags; | |
239 | ||
240 | pcic = &pcic0; | |
241 | ||
242 | local_irq_save(flags); | |
243 | writel(CONFIG_CMD(busno, devfn, where), pcic->pcic_config_space_addr); | |
244 | writel(value, pcic->pcic_config_space_data + (where&4)); | |
245 | local_irq_restore(flags); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int pcic_write_config(struct pci_bus *bus, unsigned int devfn, | |
250 | int where, int size, u32 val) | |
251 | { | |
252 | unsigned int v; | |
253 | ||
254 | if (bus->number != 0) return -EINVAL; | |
255 | switch (size) { | |
256 | case 1: | |
257 | pcic_read_config_dword(bus->number, devfn, where&~3, &v); | |
258 | v = (v & ~(0xff << (8*(where&3)))) | | |
259 | ((0xff&val) << (8*(where&3))); | |
260 | return pcic_write_config_dword(bus->number, devfn, where&~3, v); | |
261 | case 2: | |
262 | if (where&1) return -EINVAL; | |
263 | pcic_read_config_dword(bus->number, devfn, where&~3, &v); | |
264 | v = (v & ~(0xffff << (8*(where&3)))) | | |
265 | ((0xffff&val) << (8*(where&3))); | |
266 | return pcic_write_config_dword(bus->number, devfn, where&~3, v); | |
267 | case 4: | |
268 | if (where&3) return -EINVAL; | |
269 | return pcic_write_config_dword(bus->number, devfn, where, val); | |
270 | } | |
271 | return -EINVAL; | |
272 | } | |
273 | ||
274 | static struct pci_ops pcic_ops = { | |
275 | .read = pcic_read_config, | |
276 | .write = pcic_write_config, | |
277 | }; | |
278 | ||
279 | /* | |
280 | * On sparc64 pcibios_init() calls pci_controller_probe(). | |
281 | * We want PCIC probed little ahead so that interrupt controller | |
282 | * would be operational. | |
283 | */ | |
284 | int __init pcic_probe(void) | |
285 | { | |
286 | struct linux_pcic *pcic; | |
287 | struct linux_prom_registers regs[PROMREG_MAX]; | |
288 | struct linux_pbm_info* pbm; | |
289 | char namebuf[64]; | |
290 | int node; | |
291 | int err; | |
292 | ||
293 | if (pcic0_up) { | |
294 | prom_printf("PCIC: called twice!\n"); | |
295 | prom_halt(); | |
296 | } | |
297 | pcic = &pcic0; | |
298 | ||
299 | node = prom_getchild (prom_root_node); | |
300 | node = prom_searchsiblings (node, "pci"); | |
301 | if (node == 0) | |
302 | return -ENODEV; | |
303 | /* | |
304 | * Map in PCIC register set, config space, and IO base | |
305 | */ | |
306 | err = prom_getproperty(node, "reg", (char*)regs, sizeof(regs)); | |
307 | if (err == 0 || err == -1) { | |
308 | prom_printf("PCIC: Error, cannot get PCIC registers " | |
309 | "from PROM.\n"); | |
310 | prom_halt(); | |
311 | } | |
312 | ||
313 | pcic0_up = 1; | |
314 | ||
315 | pcic->pcic_res_regs.name = "pcic_registers"; | |
316 | pcic->pcic_regs = ioremap(regs[0].phys_addr, regs[0].reg_size); | |
317 | if (!pcic->pcic_regs) { | |
318 | prom_printf("PCIC: Error, cannot map PCIC registers.\n"); | |
319 | prom_halt(); | |
320 | } | |
321 | ||
322 | pcic->pcic_res_io.name = "pcic_io"; | |
323 | if ((pcic->pcic_io = (unsigned long) | |
324 | ioremap(regs[1].phys_addr, 0x10000)) == 0) { | |
325 | prom_printf("PCIC: Error, cannot map PCIC IO Base.\n"); | |
326 | prom_halt(); | |
327 | } | |
328 | ||
329 | pcic->pcic_res_cfg_addr.name = "pcic_cfg_addr"; | |
330 | if ((pcic->pcic_config_space_addr = | |
331 | ioremap(regs[2].phys_addr, regs[2].reg_size * 2)) == 0) { | |
332 | prom_printf("PCIC: Error, cannot map" | |
333 | "PCI Configuration Space Address.\n"); | |
334 | prom_halt(); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Docs say three least significant bits in address and data | |
339 | * must be the same. Thus, we need adjust size of data. | |
340 | */ | |
341 | pcic->pcic_res_cfg_data.name = "pcic_cfg_data"; | |
342 | if ((pcic->pcic_config_space_data = | |
343 | ioremap(regs[3].phys_addr, regs[3].reg_size * 2)) == 0) { | |
344 | prom_printf("PCIC: Error, cannot map" | |
345 | "PCI Configuration Space Data.\n"); | |
346 | prom_halt(); | |
347 | } | |
348 | ||
349 | pbm = &pcic->pbm; | |
350 | pbm->prom_node = node; | |
351 | prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0; | |
352 | strcpy(pbm->prom_name, namebuf); | |
353 | ||
354 | { | |
355 | extern volatile int t_nmi[1]; | |
356 | extern int pcic_nmi_trap_patch[1]; | |
357 | ||
358 | t_nmi[0] = pcic_nmi_trap_patch[0]; | |
359 | t_nmi[1] = pcic_nmi_trap_patch[1]; | |
360 | t_nmi[2] = pcic_nmi_trap_patch[2]; | |
361 | t_nmi[3] = pcic_nmi_trap_patch[3]; | |
362 | swift_flush_dcache(); | |
363 | pcic_regs = pcic->pcic_regs; | |
364 | } | |
365 | ||
366 | prom_getstring(prom_root_node, "name", namebuf, 63); namebuf[63] = 0; | |
367 | { | |
368 | struct pcic_sn2list *p; | |
369 | ||
370 | for (p = pcic_known_sysnames; p->sysname != NULL; p++) { | |
371 | if (strcmp(namebuf, p->sysname) == 0) | |
372 | break; | |
373 | } | |
374 | pcic->pcic_imap = p->intmap; | |
375 | pcic->pcic_imdim = p->mapdim; | |
376 | } | |
377 | if (pcic->pcic_imap == NULL) { | |
378 | /* | |
379 | * We do not panic here for the sake of embedded systems. | |
380 | */ | |
381 | printk("PCIC: System %s is unknown, cannot route interrupts\n", | |
382 | namebuf); | |
383 | } | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic) | |
389 | { | |
390 | struct linux_pbm_info *pbm = &pcic->pbm; | |
391 | ||
392 | pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm); | |
393 | #if 0 /* deadwood transplanted from sparc64 */ | |
394 | pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, pbm->prom_node); | |
395 | pci_record_assignments(pbm, pbm->pci_bus); | |
396 | pci_assign_unassigned(pbm, pbm->pci_bus); | |
397 | pci_fixup_irq(pbm, pbm->pci_bus); | |
398 | #endif | |
399 | } | |
400 | ||
401 | /* | |
402 | * Main entry point from the PCI subsystem. | |
403 | */ | |
404 | static int __init pcic_init(void) | |
405 | { | |
406 | struct linux_pcic *pcic; | |
407 | ||
408 | /* | |
409 | * PCIC should be initialized at start of the timer. | |
410 | * So, here we report the presence of PCIC and do some magic passes. | |
411 | */ | |
412 | if(!pcic0_up) | |
413 | return 0; | |
414 | pcic = &pcic0; | |
415 | ||
416 | /* | |
417 | * Switch off IOTLB translation. | |
418 | */ | |
419 | writeb(PCI_DVMA_CONTROL_IOTLB_DISABLE, | |
420 | pcic->pcic_regs+PCI_DVMA_CONTROL); | |
421 | ||
422 | /* | |
423 | * Increase mapped size for PCI memory space (DMA access). | |
424 | * Should be done in that order (size first, address second). | |
425 | * Why we couldn't set up 4GB and forget about it? XXX | |
426 | */ | |
427 | writel(0xF0000000UL, pcic->pcic_regs+PCI_SIZE_0); | |
428 | writel(0+PCI_BASE_ADDRESS_SPACE_MEMORY, | |
429 | pcic->pcic_regs+PCI_BASE_ADDRESS_0); | |
430 | ||
431 | pcic_pbm_scan_bus(pcic); | |
432 | ||
433 | ebus_init(); | |
434 | return 0; | |
435 | } | |
436 | ||
437 | int pcic_present(void) | |
438 | { | |
439 | return pcic0_up; | |
440 | } | |
441 | ||
442 | static int __init pdev_to_pnode(struct linux_pbm_info *pbm, | |
443 | struct pci_dev *pdev) | |
444 | { | |
445 | struct linux_prom_pci_registers regs[PROMREG_MAX]; | |
446 | int err; | |
447 | int node = prom_getchild(pbm->prom_node); | |
448 | ||
449 | while(node) { | |
450 | err = prom_getproperty(node, "reg", | |
451 | (char *)®s[0], sizeof(regs)); | |
452 | if(err != 0 && err != -1) { | |
453 | unsigned long devfn = (regs[0].which_io >> 8) & 0xff; | |
454 | if(devfn == pdev->devfn) | |
455 | return node; | |
456 | } | |
457 | node = prom_getsibling(node); | |
458 | } | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static inline struct pcidev_cookie *pci_devcookie_alloc(void) | |
463 | { | |
464 | return kmalloc(sizeof(struct pcidev_cookie), GFP_ATOMIC); | |
465 | } | |
466 | ||
467 | static void pcic_map_pci_device(struct linux_pcic *pcic, | |
468 | struct pci_dev *dev, int node) | |
469 | { | |
470 | char namebuf[64]; | |
471 | unsigned long address; | |
472 | unsigned long flags; | |
473 | int j; | |
474 | ||
475 | if (node == 0 || node == -1) { | |
476 | strcpy(namebuf, "???"); | |
477 | } else { | |
478 | prom_getstring(node, "name", namebuf, 63); namebuf[63] = 0; | |
479 | } | |
480 | ||
481 | for (j = 0; j < 6; j++) { | |
482 | address = dev->resource[j].start; | |
483 | if (address == 0) break; /* are sequential */ | |
484 | flags = dev->resource[j].flags; | |
485 | if ((flags & IORESOURCE_IO) != 0) { | |
486 | if (address < 0x10000) { | |
487 | /* | |
488 | * A device responds to I/O cycles on PCI. | |
489 | * We generate these cycles with memory | |
490 | * access into the fixed map (phys 0x30000000). | |
491 | * | |
492 | * Since a device driver does not want to | |
493 | * do ioremap() before accessing PC-style I/O, | |
494 | * we supply virtual, ready to access address. | |
495 | * | |
496 | * Ebus devices do not come here even if | |
497 | * CheerIO makes a similar conversion. | |
498 | * See ebus.c for details. | |
499 | * | |
500 | * Note that check_region()/request_region() | |
501 | * work for these devices. | |
502 | * | |
503 | * XXX Neat trick, but it's a *bad* idea | |
504 | * to shit into regions like that. | |
505 | * What if we want to allocate one more | |
506 | * PCI base address... | |
507 | */ | |
508 | dev->resource[j].start = | |
509 | pcic->pcic_io + address; | |
510 | dev->resource[j].end = 1; /* XXX */ | |
511 | dev->resource[j].flags = | |
512 | (flags & ~IORESOURCE_IO) | IORESOURCE_MEM; | |
513 | } else { | |
514 | /* | |
515 | * OOPS... PCI Spec allows this. Sun does | |
516 | * not have any devices getting above 64K | |
517 | * so it must be user with a weird I/O | |
518 | * board in a PCI slot. We must remap it | |
519 | * under 64K but it is not done yet. XXX | |
520 | */ | |
521 | printk("PCIC: Skipping I/O space at 0x%lx," | |
522 | "this will Oops if a driver attaches;" | |
523 | "device '%s' at %02x:%02x)\n", address, | |
524 | namebuf, dev->bus->number, dev->devfn); | |
525 | } | |
526 | } | |
527 | } | |
528 | } | |
529 | ||
530 | static void | |
531 | pcic_fill_irq(struct linux_pcic *pcic, struct pci_dev *dev, int node) | |
532 | { | |
533 | struct pcic_ca2irq *p; | |
534 | int i, ivec; | |
535 | char namebuf[64]; | |
536 | ||
537 | if (node == 0 || node == -1) { | |
538 | strcpy(namebuf, "???"); | |
539 | } else { | |
540 | prom_getstring(node, "name", namebuf, sizeof(namebuf)); | |
541 | } | |
542 | ||
543 | if ((p = pcic->pcic_imap) == 0) { | |
544 | dev->irq = 0; | |
545 | return; | |
546 | } | |
547 | for (i = 0; i < pcic->pcic_imdim; i++) { | |
548 | if (p->busno == dev->bus->number && p->devfn == dev->devfn) | |
549 | break; | |
550 | p++; | |
551 | } | |
552 | if (i >= pcic->pcic_imdim) { | |
553 | printk("PCIC: device %s devfn %02x:%02x not found in %d\n", | |
554 | namebuf, dev->bus->number, dev->devfn, pcic->pcic_imdim); | |
555 | dev->irq = 0; | |
556 | return; | |
557 | } | |
558 | ||
559 | i = p->pin; | |
560 | if (i >= 0 && i < 4) { | |
561 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO); | |
562 | dev->irq = ivec >> (i << 2) & 0xF; | |
563 | } else if (i >= 4 && i < 8) { | |
564 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI); | |
565 | dev->irq = ivec >> ((i-4) << 2) & 0xF; | |
566 | } else { /* Corrupted map */ | |
567 | printk("PCIC: BAD PIN %d\n", i); for (;;) {} | |
568 | } | |
569 | /* P3 */ /* printk("PCIC: device %s pin %d ivec 0x%x irq %x\n", namebuf, i, ivec, dev->irq); */ | |
570 | ||
571 | /* | |
572 | * dev->irq=0 means PROM did not bother to program the upper | |
573 | * half of PCIC. This happens on JS-E with PROM 3.11, for instance. | |
574 | */ | |
575 | if (dev->irq == 0 || p->force) { | |
576 | if (p->irq == 0 || p->irq >= 15) { /* Corrupted map */ | |
577 | printk("PCIC: BAD IRQ %d\n", p->irq); for (;;) {} | |
578 | } | |
579 | printk("PCIC: setting irq %d at pin %d for device %02x:%02x\n", | |
580 | p->irq, p->pin, dev->bus->number, dev->devfn); | |
581 | dev->irq = p->irq; | |
582 | ||
583 | i = p->pin; | |
584 | if (i >= 4) { | |
585 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI); | |
586 | ivec &= ~(0xF << ((i - 4) << 2)); | |
587 | ivec |= p->irq << ((i - 4) << 2); | |
588 | writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_HI); | |
589 | } else { | |
590 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO); | |
591 | ivec &= ~(0xF << (i << 2)); | |
592 | ivec |= p->irq << (i << 2); | |
593 | writew(ivec, pcic->pcic_regs+PCI_INT_SELECT_LO); | |
594 | } | |
595 | } | |
596 | ||
597 | return; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Normally called from {do_}pci_scan_bus... | |
602 | */ | |
603 | void __init pcibios_fixup_bus(struct pci_bus *bus) | |
604 | { | |
605 | struct pci_dev *dev; | |
606 | int i, has_io, has_mem; | |
607 | unsigned int cmd; | |
608 | struct linux_pcic *pcic; | |
609 | /* struct linux_pbm_info* pbm = &pcic->pbm; */ | |
610 | int node; | |
611 | struct pcidev_cookie *pcp; | |
612 | ||
613 | if (!pcic0_up) { | |
614 | printk("pcibios_fixup_bus: no PCIC\n"); | |
615 | return; | |
616 | } | |
617 | pcic = &pcic0; | |
618 | ||
619 | /* | |
620 | * Next crud is an equivalent of pbm = pcic_bus_to_pbm(bus); | |
621 | */ | |
622 | if (bus->number != 0) { | |
623 | printk("pcibios_fixup_bus: nonzero bus 0x%x\n", bus->number); | |
624 | return; | |
625 | } | |
626 | ||
627 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
628 | ||
629 | /* | |
630 | * Comment from i386 branch: | |
631 | * There are buggy BIOSes that forget to enable I/O and memory | |
632 | * access to PCI devices. We try to fix this, but we need to | |
633 | * be sure that the BIOS didn't forget to assign an address | |
634 | * to the device. [mj] | |
635 | * OBP is a case of such BIOS :-) | |
636 | */ | |
637 | has_io = has_mem = 0; | |
638 | for(i=0; i<6; i++) { | |
639 | unsigned long f = dev->resource[i].flags; | |
640 | if (f & IORESOURCE_IO) { | |
641 | has_io = 1; | |
642 | } else if (f & IORESOURCE_MEM) | |
643 | has_mem = 1; | |
644 | } | |
645 | pcic_read_config(dev->bus, dev->devfn, PCI_COMMAND, 2, &cmd); | |
646 | if (has_io && !(cmd & PCI_COMMAND_IO)) { | |
647 | printk("PCIC: Enabling I/O for device %02x:%02x\n", | |
648 | dev->bus->number, dev->devfn); | |
649 | cmd |= PCI_COMMAND_IO; | |
650 | pcic_write_config(dev->bus, dev->devfn, | |
651 | PCI_COMMAND, 2, cmd); | |
652 | } | |
653 | if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) { | |
654 | printk("PCIC: Enabling memory for device %02x:%02x\n", | |
655 | dev->bus->number, dev->devfn); | |
656 | cmd |= PCI_COMMAND_MEMORY; | |
657 | pcic_write_config(dev->bus, dev->devfn, | |
658 | PCI_COMMAND, 2, cmd); | |
659 | } | |
660 | ||
661 | node = pdev_to_pnode(&pcic->pbm, dev); | |
662 | if(node == 0) | |
663 | node = -1; | |
664 | ||
665 | /* cookies */ | |
666 | pcp = pci_devcookie_alloc(); | |
667 | pcp->pbm = &pcic->pbm; | |
668 | pcp->prom_node = node; | |
669 | dev->sysdata = pcp; | |
670 | ||
671 | /* fixing I/O to look like memory */ | |
672 | if ((dev->class>>16) != PCI_BASE_CLASS_BRIDGE) | |
673 | pcic_map_pci_device(pcic, dev, node); | |
674 | ||
675 | pcic_fill_irq(pcic, dev, node); | |
676 | } | |
677 | } | |
678 | ||
679 | /* | |
680 | * pcic_pin_to_irq() is exported to ebus.c. | |
681 | */ | |
682 | unsigned int | |
683 | pcic_pin_to_irq(unsigned int pin, char *name) | |
684 | { | |
685 | struct linux_pcic *pcic = &pcic0; | |
686 | unsigned int irq; | |
687 | unsigned int ivec; | |
688 | ||
689 | if (pin < 4) { | |
690 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_LO); | |
691 | irq = ivec >> (pin << 2) & 0xF; | |
692 | } else if (pin < 8) { | |
693 | ivec = readw(pcic->pcic_regs+PCI_INT_SELECT_HI); | |
694 | irq = ivec >> ((pin-4) << 2) & 0xF; | |
695 | } else { /* Corrupted map */ | |
696 | printk("PCIC: BAD PIN %d FOR %s\n", pin, name); | |
697 | for (;;) {} /* XXX Cannot panic properly in case of PROLL */ | |
698 | } | |
699 | /* P3 */ /* printk("PCIC: dev %s pin %d ivec 0x%x irq %x\n", name, pin, ivec, irq); */ | |
700 | return irq; | |
701 | } | |
702 | ||
703 | /* Makes compiler happy */ | |
704 | static volatile int pcic_timer_dummy; | |
705 | ||
706 | static void pcic_clear_clock_irq(void) | |
707 | { | |
708 | pcic_timer_dummy = readl(pcic0.pcic_regs+PCI_SYS_LIMIT); | |
709 | } | |
710 | ||
711 | static irqreturn_t pcic_timer_handler (int irq, void *h, struct pt_regs *regs) | |
712 | { | |
713 | write_seqlock(&xtime_lock); /* Dummy, to show that we remember */ | |
714 | pcic_clear_clock_irq(); | |
715 | do_timer(regs); | |
716 | #ifndef CONFIG_SMP | |
717 | update_process_times(user_mode(regs)); | |
718 | #endif | |
719 | write_sequnlock(&xtime_lock); | |
720 | return IRQ_HANDLED; | |
721 | } | |
722 | ||
723 | #define USECS_PER_JIFFY 10000 /* We have 100HZ "standard" timer for sparc */ | |
724 | #define TICK_TIMER_LIMIT ((100*1000000/4)/100) | |
725 | ||
726 | void __init pci_time_init(void) | |
727 | { | |
728 | struct linux_pcic *pcic = &pcic0; | |
729 | unsigned long v; | |
730 | int timer_irq, irq; | |
731 | ||
732 | /* A hack until do_gettimeofday prototype is moved to arch specific headers | |
733 | and btfixupped. Patch do_gettimeofday with ba pci_do_gettimeofday; nop */ | |
734 | ((unsigned int *)do_gettimeofday)[0] = | |
735 | 0x10800000 | ((((unsigned long)pci_do_gettimeofday - | |
736 | (unsigned long)do_gettimeofday) >> 2) & 0x003fffff); | |
737 | ((unsigned int *)do_gettimeofday)[1] = 0x01000000; | |
738 | BTFIXUPSET_CALL(bus_do_settimeofday, pci_do_settimeofday, BTFIXUPCALL_NORM); | |
739 | btfixup(); | |
740 | ||
741 | writel (TICK_TIMER_LIMIT, pcic->pcic_regs+PCI_SYS_LIMIT); | |
742 | /* PROM should set appropriate irq */ | |
743 | v = readb(pcic->pcic_regs+PCI_COUNTER_IRQ); | |
744 | timer_irq = PCI_COUNTER_IRQ_SYS(v); | |
745 | writel (PCI_COUNTER_IRQ_SET(timer_irq, 0), | |
746 | pcic->pcic_regs+PCI_COUNTER_IRQ); | |
747 | irq = request_irq(timer_irq, pcic_timer_handler, | |
748 | (SA_INTERRUPT | SA_STATIC_ALLOC), "timer", NULL); | |
749 | if (irq) { | |
750 | prom_printf("time_init: unable to attach IRQ%d\n", timer_irq); | |
751 | prom_halt(); | |
752 | } | |
753 | local_irq_enable(); | |
754 | } | |
755 | ||
756 | static __inline__ unsigned long do_gettimeoffset(void) | |
757 | { | |
758 | /* | |
759 | * We devide all to 100 | |
760 | * to have microsecond resolution and to avoid overflow | |
761 | */ | |
762 | unsigned long count = | |
763 | readl(pcic0.pcic_regs+PCI_SYS_COUNTER) & ~PCI_SYS_COUNTER_OVERFLOW; | |
764 | count = ((count/100)*USECS_PER_JIFFY) / (TICK_TIMER_LIMIT/100); | |
765 | return count; | |
766 | } | |
767 | ||
768 | extern unsigned long wall_jiffies; | |
769 | ||
770 | static void pci_do_gettimeofday(struct timeval *tv) | |
771 | { | |
772 | unsigned long flags; | |
773 | unsigned long seq; | |
774 | unsigned long usec, sec; | |
775 | unsigned long max_ntp_tick = tick_usec - tickadj; | |
776 | ||
777 | do { | |
778 | unsigned long lost; | |
779 | ||
780 | seq = read_seqbegin_irqsave(&xtime_lock, flags); | |
781 | usec = do_gettimeoffset(); | |
782 | lost = jiffies - wall_jiffies; | |
783 | ||
784 | /* | |
785 | * If time_adjust is negative then NTP is slowing the clock | |
786 | * so make sure not to go into next possible interval. | |
787 | * Better to lose some accuracy than have time go backwards.. | |
788 | */ | |
789 | if (unlikely(time_adjust < 0)) { | |
790 | usec = min(usec, max_ntp_tick); | |
791 | ||
792 | if (lost) | |
793 | usec += lost * max_ntp_tick; | |
794 | } | |
795 | else if (unlikely(lost)) | |
796 | usec += lost * tick_usec; | |
797 | ||
798 | sec = xtime.tv_sec; | |
799 | usec += (xtime.tv_nsec / 1000); | |
800 | } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); | |
801 | ||
802 | while (usec >= 1000000) { | |
803 | usec -= 1000000; | |
804 | sec++; | |
805 | } | |
806 | ||
807 | tv->tv_sec = sec; | |
808 | tv->tv_usec = usec; | |
809 | } | |
810 | ||
811 | static int pci_do_settimeofday(struct timespec *tv) | |
812 | { | |
813 | if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC) | |
814 | return -EINVAL; | |
815 | ||
816 | /* | |
817 | * This is revolting. We need to set "xtime" correctly. However, the | |
818 | * value in this location is the value at the most recent update of | |
819 | * wall time. Discover what correction gettimeofday() would have | |
820 | * made, and then undo it! | |
821 | */ | |
822 | tv->tv_nsec -= 1000 * (do_gettimeoffset() + | |
823 | (jiffies - wall_jiffies) * (USEC_PER_SEC / HZ)); | |
824 | while (tv->tv_nsec < 0) { | |
825 | tv->tv_nsec += NSEC_PER_SEC; | |
826 | tv->tv_sec--; | |
827 | } | |
828 | ||
829 | wall_to_monotonic.tv_sec += xtime.tv_sec - tv->tv_sec; | |
830 | wall_to_monotonic.tv_nsec += xtime.tv_nsec - tv->tv_nsec; | |
831 | ||
832 | if (wall_to_monotonic.tv_nsec > NSEC_PER_SEC) { | |
833 | wall_to_monotonic.tv_nsec -= NSEC_PER_SEC; | |
834 | wall_to_monotonic.tv_sec++; | |
835 | } | |
836 | if (wall_to_monotonic.tv_nsec < 0) { | |
837 | wall_to_monotonic.tv_nsec += NSEC_PER_SEC; | |
838 | wall_to_monotonic.tv_sec--; | |
839 | } | |
840 | ||
841 | xtime.tv_sec = tv->tv_sec; | |
842 | xtime.tv_nsec = tv->tv_nsec; | |
843 | time_adjust = 0; /* stop active adjtime() */ | |
844 | time_status |= STA_UNSYNC; | |
845 | time_maxerror = NTP_PHASE_LIMIT; | |
846 | time_esterror = NTP_PHASE_LIMIT; | |
847 | return 0; | |
848 | } | |
849 | ||
850 | #if 0 | |
851 | static void watchdog_reset() { | |
852 | writeb(0, pcic->pcic_regs+PCI_SYS_STATUS); | |
853 | } | |
854 | #endif | |
855 | ||
856 | /* | |
857 | * Other archs parse arguments here. | |
858 | */ | |
859 | char * __init pcibios_setup(char *str) | |
860 | { | |
861 | return str; | |
862 | } | |
863 | ||
864 | void pcibios_align_resource(void *data, struct resource *res, | |
865 | unsigned long size, unsigned long align) | |
866 | { | |
867 | } | |
868 | ||
869 | int pcibios_enable_device(struct pci_dev *pdev, int mask) | |
870 | { | |
871 | return 0; | |
872 | } | |
873 | ||
874 | /* | |
875 | * NMI | |
876 | */ | |
877 | void pcic_nmi(unsigned int pend, struct pt_regs *regs) | |
878 | { | |
879 | ||
880 | pend = flip_dword(pend); | |
881 | ||
882 | if (!pcic_speculative || (pend & PCI_SYS_INT_PENDING_PIO) == 0) { | |
883 | /* | |
884 | * XXX On CP-1200 PCI #SERR may happen, we do not know | |
885 | * what to do about it yet. | |
886 | */ | |
887 | printk("Aiee, NMI pend 0x%x pc 0x%x spec %d, hanging\n", | |
888 | pend, (int)regs->pc, pcic_speculative); | |
889 | for (;;) { } | |
890 | } | |
891 | pcic_speculative = 0; | |
892 | pcic_trapped = 1; | |
893 | regs->pc = regs->npc; | |
894 | regs->npc += 4; | |
895 | } | |
896 | ||
897 | static inline unsigned long get_irqmask(int irq_nr) | |
898 | { | |
899 | return 1 << irq_nr; | |
900 | } | |
901 | ||
902 | static inline char *pcic_irq_itoa(unsigned int irq) | |
903 | { | |
904 | static char buff[16]; | |
905 | sprintf(buff, "%d", irq); | |
906 | return buff; | |
907 | } | |
908 | ||
909 | static void pcic_disable_irq(unsigned int irq_nr) | |
910 | { | |
911 | unsigned long mask, flags; | |
912 | ||
913 | mask = get_irqmask(irq_nr); | |
914 | local_irq_save(flags); | |
915 | writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET); | |
916 | local_irq_restore(flags); | |
917 | } | |
918 | ||
919 | static void pcic_enable_irq(unsigned int irq_nr) | |
920 | { | |
921 | unsigned long mask, flags; | |
922 | ||
923 | mask = get_irqmask(irq_nr); | |
924 | local_irq_save(flags); | |
925 | writel(mask, pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR); | |
926 | local_irq_restore(flags); | |
927 | } | |
928 | ||
929 | static void pcic_clear_profile_irq(int cpu) | |
930 | { | |
931 | printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__); | |
932 | } | |
933 | ||
934 | static void pcic_load_profile_irq(int cpu, unsigned int limit) | |
935 | { | |
936 | printk("PCIC: unimplemented code: FILE=%s LINE=%d", __FILE__, __LINE__); | |
937 | } | |
938 | ||
939 | /* We assume the caller has disabled local interrupts when these are called, | |
940 | * or else very bizarre behavior will result. | |
941 | */ | |
942 | static void pcic_disable_pil_irq(unsigned int pil) | |
943 | { | |
944 | writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_SET); | |
945 | } | |
946 | ||
947 | static void pcic_enable_pil_irq(unsigned int pil) | |
948 | { | |
949 | writel(get_irqmask(pil), pcic0.pcic_regs+PCI_SYS_INT_TARGET_MASK_CLEAR); | |
950 | } | |
951 | ||
952 | void __init sun4m_pci_init_IRQ(void) | |
953 | { | |
954 | BTFIXUPSET_CALL(enable_irq, pcic_enable_irq, BTFIXUPCALL_NORM); | |
955 | BTFIXUPSET_CALL(disable_irq, pcic_disable_irq, BTFIXUPCALL_NORM); | |
956 | BTFIXUPSET_CALL(enable_pil_irq, pcic_enable_pil_irq, BTFIXUPCALL_NORM); | |
957 | BTFIXUPSET_CALL(disable_pil_irq, pcic_disable_pil_irq, BTFIXUPCALL_NORM); | |
958 | BTFIXUPSET_CALL(clear_clock_irq, pcic_clear_clock_irq, BTFIXUPCALL_NORM); | |
959 | BTFIXUPSET_CALL(clear_profile_irq, pcic_clear_profile_irq, BTFIXUPCALL_NORM); | |
960 | BTFIXUPSET_CALL(load_profile_irq, pcic_load_profile_irq, BTFIXUPCALL_NORM); | |
961 | BTFIXUPSET_CALL(__irq_itoa, pcic_irq_itoa, BTFIXUPCALL_NORM); | |
962 | } | |
963 | ||
964 | int pcibios_assign_resource(struct pci_dev *pdev, int resource) | |
965 | { | |
966 | return -ENXIO; | |
967 | } | |
968 | ||
969 | /* | |
970 | * This probably belongs here rather than ioport.c because | |
971 | * we do not want this crud linked into SBus kernels. | |
972 | * Also, think for a moment about likes of floppy.c that | |
973 | * include architecture specific parts. They may want to redefine ins/outs. | |
974 | * | |
975 | * We do not use horroble macroses here because we want to | |
976 | * advance pointer by sizeof(size). | |
977 | */ | |
978 | void outsb(unsigned long addr, const void *src, unsigned long count) | |
979 | { | |
980 | while (count) { | |
981 | count -= 1; | |
982 | outb(*(const char *)src, addr); | |
983 | src += 1; | |
984 | /* addr += 1; */ | |
985 | } | |
986 | } | |
987 | ||
988 | void outsw(unsigned long addr, const void *src, unsigned long count) | |
989 | { | |
990 | while (count) { | |
991 | count -= 2; | |
992 | outw(*(const short *)src, addr); | |
993 | src += 2; | |
994 | /* addr += 2; */ | |
995 | } | |
996 | } | |
997 | ||
998 | void outsl(unsigned long addr, const void *src, unsigned long count) | |
999 | { | |
1000 | while (count) { | |
1001 | count -= 4; | |
1002 | outl(*(const long *)src, addr); | |
1003 | src += 4; | |
1004 | /* addr += 4; */ | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | void insb(unsigned long addr, void *dst, unsigned long count) | |
1009 | { | |
1010 | while (count) { | |
1011 | count -= 1; | |
1012 | *(unsigned char *)dst = inb(addr); | |
1013 | dst += 1; | |
1014 | /* addr += 1; */ | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | void insw(unsigned long addr, void *dst, unsigned long count) | |
1019 | { | |
1020 | while (count) { | |
1021 | count -= 2; | |
1022 | *(unsigned short *)dst = inw(addr); | |
1023 | dst += 2; | |
1024 | /* addr += 2; */ | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | void insl(unsigned long addr, void *dst, unsigned long count) | |
1029 | { | |
1030 | while (count) { | |
1031 | count -= 4; | |
1032 | /* | |
1033 | * XXX I am sure we are in for an unaligned trap here. | |
1034 | */ | |
1035 | *(unsigned long *)dst = inl(addr); | |
1036 | dst += 4; | |
1037 | /* addr += 4; */ | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | subsys_initcall(pcic_init); |