xref: /openbmc/u-boot/drivers/pci/fsl_pci_init.c (revision 79a34b71)
1 /*
2  * Copyright 2007-2012 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <malloc.h>
9 #include <asm/fsl_serdes.h>
10 
11 DECLARE_GLOBAL_DATA_PTR;
12 
13 /*
14  * PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
15  *
16  * Initialize controller and call the common driver/pci pci_hose_scan to
17  * scan for bridges and devices.
18  *
19  * Hose fields which need to be pre-initialized by board specific code:
20  *   regions[]
21  *   first_busno
22  *
23  * Fields updated:
24  *   last_busno
25  */
26 
27 #include <pci.h>
28 #include <asm/io.h>
29 #include <asm/fsl_pci.h>
30 
31 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
32 #define CONFIG_SYS_PCI_MEMORY_BUS 0
33 #endif
34 
35 #ifndef CONFIG_SYS_PCI_MEMORY_PHYS
36 #define CONFIG_SYS_PCI_MEMORY_PHYS 0
37 #endif
38 
39 #if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
40 #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
41 #endif
42 
43 /* Setup one inbound ATMU window.
44  *
45  * We let the caller decide what the window size should be
46  */
47 static void set_inbound_window(volatile pit_t *pi,
48 				struct pci_region *r,
49 				u64 size)
50 {
51 	u32 sz = (__ilog2_u64(size) - 1);
52 #ifdef CONFIG_SYS_FSL_ERRATUM_A005434
53 	u32 flag = 0;
54 #else
55 	u32 flag = PIWAR_LOCAL;
56 #endif
57 
58 	flag |= PIWAR_EN | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
59 
60 	out_be32(&pi->pitar, r->phys_start >> 12);
61 	out_be32(&pi->piwbar, r->bus_start >> 12);
62 #ifdef CONFIG_SYS_PCI_64BIT
63 	out_be32(&pi->piwbear, r->bus_start >> 44);
64 #else
65 	out_be32(&pi->piwbear, 0);
66 #endif
67 	if (r->flags & PCI_REGION_PREFETCH)
68 		flag |= PIWAR_PF;
69 	out_be32(&pi->piwar, flag | sz);
70 }
71 
72 int fsl_setup_hose(struct pci_controller *hose, unsigned long addr)
73 {
74 	volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) addr;
75 
76 	/* Reset hose to make sure its in a clean state */
77 	memset(hose, 0, sizeof(struct pci_controller));
78 
79 	pci_setup_indirect(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);
80 
81 	return fsl_is_pci_agent(hose);
82 }
83 
84 static int fsl_pci_setup_inbound_windows(struct pci_controller *hose,
85 					 u64 out_lo, u8 pcie_cap,
86 					 volatile pit_t *pi)
87 {
88 	struct pci_region *r = hose->regions + hose->region_count;
89 	u64 sz = min((u64)gd->ram_size, (1ull << 32));
90 
91 	phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
92 	pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
93 	pci_size_t pci_sz;
94 
95 	/* we have no space available for inbound memory mapping */
96 	if (bus_start > out_lo) {
97 		printf ("no space for inbound mapping of memory\n");
98 		return 0;
99 	}
100 
101 	/* limit size */
102 	if ((bus_start + sz) > out_lo) {
103 		sz = out_lo - bus_start;
104 		debug ("limiting size to %llx\n", sz);
105 	}
106 
107 	pci_sz = 1ull << __ilog2_u64(sz);
108 	/*
109 	 * we can overlap inbound/outbound windows on PCI-E since RX & TX
110 	 * links a separate
111 	 */
112 	if ((pcie_cap == PCI_CAP_ID_EXP) && (pci_sz < sz)) {
113 		debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
114 			(u64)bus_start, (u64)phys_start, (u64)sz);
115 		pci_set_region(r, bus_start, phys_start, sz,
116 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
117 				PCI_REGION_PREFETCH);
118 
119 		/* if we aren't an exact power of two match, pci_sz is smaller
120 		 * round it up to the next power of two.  We report the actual
121 		 * size to pci region tracking.
122 		 */
123 		if (pci_sz != sz)
124 			sz = 2ull << __ilog2_u64(sz);
125 
126 		set_inbound_window(pi--, r++, sz);
127 		sz = 0; /* make sure we dont set the R2 window */
128 	} else {
129 		debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
130 			(u64)bus_start, (u64)phys_start, (u64)pci_sz);
131 		pci_set_region(r, bus_start, phys_start, pci_sz,
132 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
133 				PCI_REGION_PREFETCH);
134 		set_inbound_window(pi--, r++, pci_sz);
135 
136 		sz -= pci_sz;
137 		bus_start += pci_sz;
138 		phys_start += pci_sz;
139 
140 		pci_sz = 1ull << __ilog2_u64(sz);
141 		if (sz) {
142 			debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
143 				(u64)bus_start, (u64)phys_start, (u64)pci_sz);
144 			pci_set_region(r, bus_start, phys_start, pci_sz,
145 					PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
146 					PCI_REGION_PREFETCH);
147 			set_inbound_window(pi--, r++, pci_sz);
148 			sz -= pci_sz;
149 			bus_start += pci_sz;
150 			phys_start += pci_sz;
151 		}
152 	}
153 
154 #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
155 	/*
156 	 * On 64-bit capable systems, set up a mapping for all of DRAM
157 	 * in high pci address space.
158 	 */
159 	pci_sz = 1ull << __ilog2_u64(gd->ram_size);
160 	/* round up to the next largest power of two */
161 	if (gd->ram_size > pci_sz)
162 		pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
163 	debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
164 		(u64)CONFIG_SYS_PCI64_MEMORY_BUS,
165 		(u64)CONFIG_SYS_PCI_MEMORY_PHYS,
166 		(u64)pci_sz);
167 	pci_set_region(r,
168 			CONFIG_SYS_PCI64_MEMORY_BUS,
169 			CONFIG_SYS_PCI_MEMORY_PHYS,
170 			pci_sz,
171 			PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
172 			PCI_REGION_PREFETCH);
173 	set_inbound_window(pi--, r++, pci_sz);
174 #else
175 	pci_sz = 1ull << __ilog2_u64(sz);
176 	if (sz) {
177 		debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
178 			(u64)bus_start, (u64)phys_start, (u64)pci_sz);
179 		pci_set_region(r, bus_start, phys_start, pci_sz,
180 				PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
181 				PCI_REGION_PREFETCH);
182 		sz -= pci_sz;
183 		bus_start += pci_sz;
184 		phys_start += pci_sz;
185 		set_inbound_window(pi--, r++, pci_sz);
186 	}
187 #endif
188 
189 #ifdef CONFIG_PHYS_64BIT
190 	if (sz && (((u64)gd->ram_size) < (1ull << 32)))
191 		printf("Was not able to map all of memory via "
192 			"inbound windows -- %lld remaining\n", sz);
193 #endif
194 
195 	hose->region_count = r - hose->regions;
196 
197 	return 1;
198 }
199 
200 #ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
201 static void fsl_pcie_boot_master(pit_t *pi)
202 {
203 	/* configure inbound window for slave's u-boot image */
204 	debug("PCIEBOOT - MASTER: Inbound window for slave's image; "
205 			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
206 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
207 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
208 			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
209 	struct pci_region r_inbound;
210 	u32 sz_inbound = __ilog2_u64(CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE)
211 					- 1;
212 	pci_set_region(&r_inbound,
213 		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS1,
214 		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
215 		sz_inbound,
216 		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
217 
218 	set_inbound_window(pi--, &r_inbound,
219 		CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
220 
221 	/* configure inbound window for slave's u-boot image */
222 	debug("PCIEBOOT - MASTER: Inbound window for slave's image; "
223 			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
224 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
225 			(u64)CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
226 			CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
227 	pci_set_region(&r_inbound,
228 		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_BUS2,
229 		CONFIG_SRIO_PCIE_BOOT_IMAGE_MEM_PHYS,
230 		sz_inbound,
231 		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
232 
233 	set_inbound_window(pi--, &r_inbound,
234 		CONFIG_SRIO_PCIE_BOOT_IMAGE_SIZE);
235 
236 	/* configure inbound window for slave's ucode and ENV */
237 	debug("PCIEBOOT - MASTER: Inbound window for slave's "
238 			"ucode and ENV; "
239 			"Local = 0x%llx, Bus = 0x%llx, Size = 0x%x\n",
240 			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
241 			(u64)CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
242 			CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
243 	sz_inbound = __ilog2_u64(CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE)
244 				- 1;
245 	pci_set_region(&r_inbound,
246 		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_BUS,
247 		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_MEM_PHYS,
248 		sz_inbound,
249 		PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
250 
251 	set_inbound_window(pi--, &r_inbound,
252 		CONFIG_SRIO_PCIE_BOOT_UCODE_ENV_SIZE);
253 }
254 
255 static void fsl_pcie_boot_master_release_slave(int port)
256 {
257 	unsigned long release_addr;
258 
259 	/* now release slave's core 0 */
260 	switch (port) {
261 	case 1:
262 		release_addr = CONFIG_SYS_PCIE1_MEM_VIRT
263 			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
264 		break;
265 #ifdef CONFIG_SYS_PCIE2_MEM_VIRT
266 	case 2:
267 		release_addr = CONFIG_SYS_PCIE2_MEM_VIRT
268 			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
269 		break;
270 #endif
271 #ifdef CONFIG_SYS_PCIE3_MEM_VIRT
272 	case 3:
273 		release_addr = CONFIG_SYS_PCIE3_MEM_VIRT
274 			+ CONFIG_SRIO_PCIE_BOOT_BRR_OFFSET;
275 		break;
276 #endif
277 	default:
278 		release_addr = 0;
279 		break;
280 	}
281 	if (release_addr != 0) {
282 		out_be32((void *)release_addr,
283 			CONFIG_SRIO_PCIE_BOOT_RELEASE_MASK);
284 		debug("PCIEBOOT - MASTER: "
285 			"Release slave successfully! Now the slave should start up!\n");
286 	} else {
287 		debug("PCIEBOOT - MASTER: "
288 			"Release slave failed!\n");
289 	}
290 }
291 #endif
292 
293 void fsl_pci_init(struct pci_controller *hose, struct fsl_pci_info *pci_info)
294 {
295 	u32 cfg_addr = (u32)&((ccsr_fsl_pci_t *)pci_info->regs)->cfg_addr;
296 	u32 cfg_data = (u32)&((ccsr_fsl_pci_t *)pci_info->regs)->cfg_data;
297 	u16 temp16;
298 	u32 temp32;
299 	u32 block_rev;
300 	int enabled, r, inbound = 0;
301 	u16 ltssm;
302 	u8 temp8, pcie_cap;
303 	int pcie_cap_pos;
304 	int pci_dcr;
305 	int pci_dsr;
306 	int pci_lsr;
307 
308 #if defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
309 	int pci_lcr;
310 #endif
311 
312 	volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)cfg_addr;
313 	struct pci_region *reg = hose->regions + hose->region_count;
314 	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
315 
316 	/* Initialize ATMU registers based on hose regions and flags */
317 	volatile pot_t *po = &pci->pot[1];	/* skip 0 */
318 	volatile pit_t *pi;
319 
320 	u64 out_hi = 0, out_lo = -1ULL;
321 	u32 pcicsrbar, pcicsrbar_sz;
322 
323 	pci_setup_indirect(hose, cfg_addr, cfg_data);
324 
325 	block_rev = in_be32(&pci->block_rev1);
326 	if (PEX_IP_BLK_REV_2_2 <= block_rev) {
327 		pi = &pci->pit[2];	/* 0xDC0 */
328 	} else {
329 		pi = &pci->pit[3];	/* 0xDE0 */
330 	}
331 
332 	/* Handle setup of outbound windows first */
333 	for (r = 0; r < hose->region_count; r++) {
334 		unsigned long flags = hose->regions[r].flags;
335 		u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);
336 
337 		flags &= PCI_REGION_SYS_MEMORY|PCI_REGION_TYPE;
338 		if (flags != PCI_REGION_SYS_MEMORY) {
339 			u64 start = hose->regions[r].bus_start;
340 			u64 end = start + hose->regions[r].size;
341 
342 			out_be32(&po->powbar, hose->regions[r].phys_start >> 12);
343 			out_be32(&po->potar, start >> 12);
344 #ifdef CONFIG_SYS_PCI_64BIT
345 			out_be32(&po->potear, start >> 44);
346 #else
347 			out_be32(&po->potear, 0);
348 #endif
349 			if (hose->regions[r].flags & PCI_REGION_IO) {
350 				out_be32(&po->powar, POWAR_EN | sz |
351 					POWAR_IO_READ | POWAR_IO_WRITE);
352 			} else {
353 				out_be32(&po->powar, POWAR_EN | sz |
354 					POWAR_MEM_READ | POWAR_MEM_WRITE);
355 				out_lo = min(start, out_lo);
356 				out_hi = max(end, out_hi);
357 			}
358 			po++;
359 		}
360 	}
361 	debug("Outbound memory range: %llx:%llx\n", out_lo, out_hi);
362 
363 	/* setup PCSRBAR/PEXCSRBAR */
364 	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, 0xffffffff);
365 	pci_hose_read_config_dword (hose, dev, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
366 	pcicsrbar_sz = ~pcicsrbar_sz + 1;
367 
368 	if (out_hi < (0x100000000ull - pcicsrbar_sz) ||
369 		(out_lo > 0x100000000ull))
370 		pcicsrbar = 0x100000000ull - pcicsrbar_sz;
371 	else
372 		pcicsrbar = (out_lo - pcicsrbar_sz) & -pcicsrbar_sz;
373 	pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, pcicsrbar);
374 
375 	out_lo = min(out_lo, (u64)pcicsrbar);
376 
377 	debug("PCICSRBAR @ 0x%x\n", pcicsrbar);
378 
379 	pci_set_region(reg++, pcicsrbar, CONFIG_SYS_CCSRBAR_PHYS,
380 			pcicsrbar_sz, PCI_REGION_SYS_MEMORY);
381 	hose->region_count++;
382 
383 	/* see if we are a PCIe or PCI controller */
384 	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
385 	pci_dcr = pcie_cap_pos + 0x08;
386 	pci_dsr = pcie_cap_pos + 0x0a;
387 	pci_lsr = pcie_cap_pos + 0x12;
388 
389 	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
390 
391 #ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
392 	/* boot from PCIE --master */
393 	char *s = getenv("bootmaster");
394 	char pcie[6];
395 	sprintf(pcie, "PCIE%d", pci_info->pci_num);
396 
397 	if (s && (strcmp(s, pcie) == 0)) {
398 		debug("PCIEBOOT - MASTER: Master port [ %d ] for pcie boot.\n",
399 				pci_info->pci_num);
400 		fsl_pcie_boot_master((pit_t *)pi);
401 	} else {
402 		/* inbound */
403 		inbound = fsl_pci_setup_inbound_windows(hose,
404 					out_lo, pcie_cap, pi);
405 	}
406 #else
407 	/* inbound */
408 	inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi);
409 #endif
410 
411 	for (r = 0; r < hose->region_count; r++)
412 		debug("PCI reg:%d %016llx:%016llx %016llx %08lx\n", r,
413 			(u64)hose->regions[r].phys_start,
414 			(u64)hose->regions[r].bus_start,
415 			(u64)hose->regions[r].size,
416 			hose->regions[r].flags);
417 
418 	pci_register_hose(hose);
419 	pciauto_config_init(hose);	/* grab pci_{mem,prefetch,io} */
420 	hose->current_busno = hose->first_busno;
421 
422 	out_be32(&pci->pedr, 0xffffffff);	/* Clear any errors */
423 	out_be32(&pci->peer, ~0x20140);	/* Enable All Error Interrupts except
424 					 * - Master abort (pci)
425 					 * - Master PERR (pci)
426 					 * - ICCA (PCIe)
427 					 */
428 	pci_hose_read_config_dword(hose, dev, pci_dcr, &temp32);
429 	temp32 |= 0xf000e;		/* set URR, FER, NFER (but not CER) */
430 	pci_hose_write_config_dword(hose, dev, pci_dcr, temp32);
431 
432 #if defined(CONFIG_FSL_PCIE_DISABLE_ASPM)
433 	pci_lcr = pcie_cap_pos + 0x10;
434 	temp32 = 0;
435 	pci_hose_read_config_dword(hose, dev, pci_lcr, &temp32);
436 	temp32 &= ~0x03;		/* Disable ASPM  */
437 	pci_hose_write_config_dword(hose, dev, pci_lcr, temp32);
438 	udelay(1);
439 #endif
440 	if (pcie_cap == PCI_CAP_ID_EXP) {
441 		if (block_rev >= PEX_IP_BLK_REV_3_0) {
442 #define PEX_CSR0_LTSSM_MASK	0xFC
443 #define PEX_CSR0_LTSSM_SHIFT	2
444 			ltssm = (in_be32(&pci->pex_csr0)
445 				& PEX_CSR0_LTSSM_MASK) >> PEX_CSR0_LTSSM_SHIFT;
446 			enabled = (ltssm == 0x11) ? 1 : 0;
447 #ifdef CONFIG_FSL_PCIE_RESET
448 			int i;
449 			/* assert PCIe reset */
450 			setbits_be32(&pci->pdb_stat, 0x08000000);
451 			(void) in_be32(&pci->pdb_stat);
452 			udelay(1000);
453 			/* clear PCIe reset */
454 			clrbits_be32(&pci->pdb_stat, 0x08000000);
455 			asm("sync;isync");
456 			for (i = 0; i < 100 && ltssm < PCI_LTSSM_L0; i++) {
457 				pci_hose_read_config_word(hose, dev, PCI_LTSSM,
458 							  &ltssm);
459 				udelay(1000);
460 			}
461 #endif
462 		} else {
463 		/* pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm); */
464 		/* enabled = ltssm >= PCI_LTSSM_L0; */
465 		pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
466 		enabled = ltssm >= PCI_LTSSM_L0;
467 
468 #ifdef CONFIG_FSL_PCIE_RESET
469 		if (ltssm == 1) {
470 			int i;
471 			debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm);
472 			/* assert PCIe reset */
473 			setbits_be32(&pci->pdb_stat, 0x08000000);
474 			(void) in_be32(&pci->pdb_stat);
475 			udelay(100);
476 			debug("  Asserting PCIe reset @%p = %x\n",
477 			      &pci->pdb_stat, in_be32(&pci->pdb_stat));
478 			/* clear PCIe reset */
479 			clrbits_be32(&pci->pdb_stat, 0x08000000);
480 			asm("sync;isync");
481 			for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
482 				pci_hose_read_config_word(hose, dev, PCI_LTSSM,
483 							&ltssm);
484 				udelay(1000);
485 				debug("....PCIe link error. "
486 				      "LTSSM=0x%02x.\n", ltssm);
487 			}
488 			enabled = ltssm >= PCI_LTSSM_L0;
489 
490 			/* we need to re-write the bar0 since a reset will
491 			 * clear it
492 			 */
493 			pci_hose_write_config_dword(hose, dev,
494 					PCI_BASE_ADDRESS_0, pcicsrbar);
495 		}
496 #endif
497 	}
498 
499 #ifdef CONFIG_SYS_P4080_ERRATUM_PCIE_A003
500 		if (enabled == 0) {
501 			serdes_corenet_t *srds_regs = (void *)CONFIG_SYS_FSL_CORENET_SERDES_ADDR;
502 			temp32 = in_be32(&srds_regs->srdspccr0);
503 
504 			if ((temp32 >> 28) == 3) {
505 				int i;
506 
507 				out_be32(&srds_regs->srdspccr0, 2 << 28);
508 				setbits_be32(&pci->pdb_stat, 0x08000000);
509 				in_be32(&pci->pdb_stat);
510 				udelay(100);
511 				clrbits_be32(&pci->pdb_stat, 0x08000000);
512 				asm("sync;isync");
513 				for (i=0; i < 100 && ltssm < PCI_LTSSM_L0; i++) {
514 					pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
515 					udelay(1000);
516 				}
517 				enabled = ltssm >= PCI_LTSSM_L0;
518 			}
519 		}
520 #endif
521 		if (!enabled) {
522 			/* Let the user know there's no PCIe link for root
523 			 * complex. for endpoint, the link may not setup, so
524 			 * print undetermined.
525 			 */
526 			if (fsl_is_pci_agent(hose))
527 				printf("undetermined, regs @ 0x%lx\n", pci_info->regs);
528 			else
529 				printf("no link, regs @ 0x%lx\n", pci_info->regs);
530 			hose->last_busno = hose->first_busno;
531 			return;
532 		}
533 
534 		out_be32(&pci->pme_msg_det, 0xffffffff);
535 		out_be32(&pci->pme_msg_int_en, 0xffffffff);
536 
537 		/* Print the negotiated PCIe link width */
538 		pci_hose_read_config_word(hose, dev, pci_lsr, &temp16);
539 		printf("x%d gen%d, regs @ 0x%lx\n", (temp16 & 0x3f0) >> 4,
540 		       (temp16 & 0xf), pci_info->regs);
541 
542 		hose->current_busno++; /* Start scan with secondary */
543 		pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
544 	}
545 
546 #ifdef CONFIG_SYS_FSL_ERRATUM_A007815
547 	/* The Read-Only Write Enable bit defaults to 1 instead of 0.
548 	 * Set to 0 to protect the read-only registers.
549 	 */
550 	clrbits_be32(&pci->dbi_ro_wr_en, 0x01);
551 #endif
552 
553 	/* Use generic setup_device to initialize standard pci regs,
554 	 * but do not allocate any windows since any BAR found (such
555 	 * as PCSRBAR) is not in this cpu's memory space.
556 	 */
557 	pciauto_setup_device(hose, dev, 0, hose->pci_mem,
558 			     hose->pci_prefetch, hose->pci_io);
559 
560 	if (inbound) {
561 		pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
562 		pci_hose_write_config_word(hose, dev, PCI_COMMAND,
563 					   temp16 | PCI_COMMAND_MEMORY);
564 	}
565 
566 #ifndef CONFIG_PCI_NOSCAN
567 	if (!fsl_is_pci_agent(hose)) {
568 		debug("           Scanning PCI bus %02x\n",
569 			hose->current_busno);
570 		hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
571 	} else {
572 		debug("           Not scanning PCI bus %02x. PI=%x\n",
573 			hose->current_busno, temp8);
574 		hose->last_busno = hose->current_busno;
575 	}
576 
577 	/* if we are PCIe - update limit regs and subordinate busno
578 	 * for the virtual P2P bridge
579 	 */
580 	if (pcie_cap == PCI_CAP_ID_EXP) {
581 		pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
582 	}
583 #else
584 	hose->last_busno = hose->current_busno;
585 #endif
586 
587 	/* Clear all error indications */
588 	if (pcie_cap == PCI_CAP_ID_EXP)
589 		out_be32(&pci->pme_msg_det, 0xffffffff);
590 	out_be32(&pci->pedr, 0xffffffff);
591 
592 	pci_hose_read_config_word(hose, dev, pci_dsr, &temp16);
593 	if (temp16) {
594 		pci_hose_write_config_word(hose, dev, pci_dsr, 0xffff);
595 	}
596 
597 	pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
598 	if (temp16) {
599 		pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
600 	}
601 }
602 
603 int fsl_is_pci_agent(struct pci_controller *hose)
604 {
605 	int pcie_cap_pos;
606 	u8 pcie_cap;
607 	pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
608 
609 	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
610 	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
611 	if (pcie_cap == PCI_CAP_ID_EXP) {
612 		u8 header_type;
613 
614 		pci_hose_read_config_byte(hose, dev, PCI_HEADER_TYPE,
615 					  &header_type);
616 		return (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
617 	} else {
618 		u8 prog_if;
619 
620 		pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if);
621 		/* Programming Interface (PCI_CLASS_PROG)
622 		 * 0 == pci host or pcie root-complex,
623 		 * 1 == pci agent or pcie end-point
624 		 */
625 		return (prog_if == FSL_PROG_IF_AGENT);
626 	}
627 }
628 
629 int fsl_pci_init_port(struct fsl_pci_info *pci_info,
630 			struct pci_controller *hose, int busno)
631 {
632 	volatile ccsr_fsl_pci_t *pci;
633 	struct pci_region *r;
634 	pci_dev_t dev = PCI_BDF(busno,0,0);
635 	int pcie_cap_pos;
636 	u8 pcie_cap;
637 
638 	pci = (ccsr_fsl_pci_t *) pci_info->regs;
639 
640 	/* on non-PCIe controllers we don't have pme_msg_det so this code
641 	 * should do nothing since the read will return 0
642 	 */
643 	if (in_be32(&pci->pme_msg_det)) {
644 		out_be32(&pci->pme_msg_det, 0xffffffff);
645 		debug (" with errors.  Clearing.  Now 0x%08x",
646 			pci->pme_msg_det);
647 	}
648 
649 	r = hose->regions + hose->region_count;
650 
651 	/* outbound memory */
652 	pci_set_region(r++,
653 			pci_info->mem_bus,
654 			pci_info->mem_phys,
655 			pci_info->mem_size,
656 			PCI_REGION_MEM);
657 
658 	/* outbound io */
659 	pci_set_region(r++,
660 			pci_info->io_bus,
661 			pci_info->io_phys,
662 			pci_info->io_size,
663 			PCI_REGION_IO);
664 
665 	hose->region_count = r - hose->regions;
666 	hose->first_busno = busno;
667 
668 	fsl_pci_init(hose, pci_info);
669 
670 	if (fsl_is_pci_agent(hose)) {
671 		fsl_pci_config_unlock(hose);
672 		hose->last_busno = hose->first_busno;
673 #ifdef CONFIG_SRIO_PCIE_BOOT_MASTER
674 	} else {
675 		/* boot from PCIE --master releases slave's core 0 */
676 		char *s = getenv("bootmaster");
677 		char pcie[6];
678 		sprintf(pcie, "PCIE%d", pci_info->pci_num);
679 
680 		if (s && (strcmp(s, pcie) == 0))
681 			fsl_pcie_boot_master_release_slave(pci_info->pci_num);
682 #endif
683 	}
684 
685 	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
686 	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
687 	printf("PCI%s%x: Bus %02x - %02x\n", pcie_cap == PCI_CAP_ID_EXP ?
688 		"e" : "", pci_info->pci_num,
689 		hose->first_busno, hose->last_busno);
690 	return(hose->last_busno + 1);
691 }
692 
693 /* Enable inbound PCI config cycles for agent/endpoint interface */
694 void fsl_pci_config_unlock(struct pci_controller *hose)
695 {
696 	pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
697 	int pcie_cap_pos;
698 	u8 pcie_cap;
699 	u16 pbfr;
700 
701 	if (!fsl_is_pci_agent(hose))
702 		return;
703 
704 	pcie_cap_pos = pci_hose_find_capability(hose, dev, PCI_CAP_ID_EXP);
705 	pci_hose_read_config_byte(hose, dev, pcie_cap_pos, &pcie_cap);
706 	if (pcie_cap != 0x0) {
707 		ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)hose->cfg_addr;
708 		u32 block_rev = in_be32(&pci->block_rev1);
709 		/* PCIe - set CFG_READY bit of Configuration Ready Register */
710 		if (block_rev >= PEX_IP_BLK_REV_3_0)
711 			setbits_be32(&pci->config, FSL_PCIE_V3_CFG_RDY);
712 		else
713 			pci_hose_write_config_byte(hose, dev,
714 						   FSL_PCIE_CFG_RDY, 0x1);
715 	} else {
716 		/* PCI - clear ACL bit of PBFR */
717 		pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
718 		pbfr &= ~0x20;
719 		pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
720 	}
721 }
722 
723 #if defined(CONFIG_PCIE1) || defined(CONFIG_PCIE2) || \
724     defined(CONFIG_PCIE3) || defined(CONFIG_PCIE4)
725 int fsl_configure_pcie(struct fsl_pci_info *info,
726 			struct pci_controller *hose,
727 			const char *connected, int busno)
728 {
729 	int is_endpoint;
730 
731 	set_next_law(info->mem_phys, law_size_bits(info->mem_size), info->law);
732 	set_next_law(info->io_phys, law_size_bits(info->io_size), info->law);
733 
734 	is_endpoint = fsl_setup_hose(hose, info->regs);
735 	printf("PCIe%u: %s", info->pci_num,
736 		is_endpoint ? "Endpoint" : "Root Complex");
737 	if (connected)
738 		printf(" of %s", connected);
739 	puts(", ");
740 
741 	return fsl_pci_init_port(info, hose, busno);
742 }
743 
744 #if defined(CONFIG_FSL_CORENET)
745 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
746 	#define _DEVDISR_PCIE1 FSL_CORENET_DEVDISR3_PCIE1
747 	#define _DEVDISR_PCIE2 FSL_CORENET_DEVDISR3_PCIE2
748 	#define _DEVDISR_PCIE3 FSL_CORENET_DEVDISR3_PCIE3
749 	#define _DEVDISR_PCIE4 FSL_CORENET_DEVDISR3_PCIE4
750 #else
751 	#define _DEVDISR_PCIE1 FSL_CORENET_DEVDISR_PCIE1
752 	#define _DEVDISR_PCIE2 FSL_CORENET_DEVDISR_PCIE2
753 	#define _DEVDISR_PCIE3 FSL_CORENET_DEVDISR_PCIE3
754 	#define _DEVDISR_PCIE4 FSL_CORENET_DEVDISR_PCIE4
755 #endif
756 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
757 #elif defined(CONFIG_MPC85xx)
758 	#define _DEVDISR_PCIE1 MPC85xx_DEVDISR_PCIE
759 	#define _DEVDISR_PCIE2 MPC85xx_DEVDISR_PCIE2
760 	#define _DEVDISR_PCIE3 MPC85xx_DEVDISR_PCIE3
761 	#define _DEVDISR_PCIE4 0
762 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR CONFIG_SYS_MPC85xx_GUTS_ADDR
763 #elif defined(CONFIG_MPC86xx)
764 	#define _DEVDISR_PCIE1 MPC86xx_DEVDISR_PCIE1
765 	#define _DEVDISR_PCIE2 MPC86xx_DEVDISR_PCIE2
766 	#define _DEVDISR_PCIE3 0
767 	#define _DEVDISR_PCIE4 0
768 	#define CONFIG_SYS_MPC8xxx_GUTS_ADDR \
769 		(&((immap_t *)CONFIG_SYS_IMMR)->im_gur)
770 #else
771 #error "No defines for DEVDISR_PCIE"
772 #endif
773 
774 /* Implement a dummy function for those platforms w/o SERDES */
775 static const char *__board_serdes_name(enum srds_prtcl device)
776 {
777 	switch (device) {
778 #ifdef CONFIG_SYS_PCIE1_NAME
779 	case PCIE1:
780 		return CONFIG_SYS_PCIE1_NAME;
781 #endif
782 #ifdef CONFIG_SYS_PCIE2_NAME
783 	case PCIE2:
784 		return CONFIG_SYS_PCIE2_NAME;
785 #endif
786 #ifdef CONFIG_SYS_PCIE3_NAME
787 	case PCIE3:
788 		return CONFIG_SYS_PCIE3_NAME;
789 #endif
790 #ifdef CONFIG_SYS_PCIE4_NAME
791 	case PCIE4:
792 		return CONFIG_SYS_PCIE4_NAME;
793 #endif
794 	default:
795 		return NULL;
796 	}
797 
798 	return NULL;
799 }
800 
801 __attribute__((weak, alias("__board_serdes_name"))) const char *
802 board_serdes_name(enum srds_prtcl device);
803 
804 static u32 devdisr_mask[] = {
805 	_DEVDISR_PCIE1,
806 	_DEVDISR_PCIE2,
807 	_DEVDISR_PCIE3,
808 	_DEVDISR_PCIE4,
809 };
810 
811 int fsl_pcie_init_ctrl(int busno, u32 devdisr, enum srds_prtcl dev,
812 			struct fsl_pci_info *pci_info)
813 {
814 	struct pci_controller *hose;
815 	int num = dev - PCIE1;
816 
817 	hose = calloc(1, sizeof(struct pci_controller));
818 	if (!hose)
819 		return busno;
820 
821 	if (is_serdes_configured(dev) && !(devdisr & devdisr_mask[num])) {
822 		busno = fsl_configure_pcie(pci_info, hose,
823 				board_serdes_name(dev), busno);
824 	} else {
825 		printf("PCIe%d: disabled\n", num + 1);
826 	}
827 
828 	return busno;
829 }
830 
831 int fsl_pcie_init_board(int busno)
832 {
833 	struct fsl_pci_info pci_info;
834 	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC8xxx_GUTS_ADDR;
835 	u32 devdisr;
836 	u32 *addr;
837 
838 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
839 	addr = &gur->devdisr3;
840 #else
841 	addr = &gur->devdisr;
842 #endif
843 	devdisr = in_be32(addr);
844 
845 #ifdef CONFIG_PCIE1
846 	SET_STD_PCIE_INFO(pci_info, 1);
847 	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE1, &pci_info);
848 #else
849 	setbits_be32(addr, _DEVDISR_PCIE1); /* disable */
850 #endif
851 
852 #ifdef CONFIG_PCIE2
853 	SET_STD_PCIE_INFO(pci_info, 2);
854 	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE2, &pci_info);
855 #else
856 	setbits_be32(addr, _DEVDISR_PCIE2); /* disable */
857 #endif
858 
859 #ifdef CONFIG_PCIE3
860 	SET_STD_PCIE_INFO(pci_info, 3);
861 	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE3, &pci_info);
862 #else
863 	setbits_be32(addr, _DEVDISR_PCIE3); /* disable */
864 #endif
865 
866 #ifdef CONFIG_PCIE4
867 	SET_STD_PCIE_INFO(pci_info, 4);
868 	busno = fsl_pcie_init_ctrl(busno, devdisr, PCIE4, &pci_info);
869 #else
870 	setbits_be32(addr, _DEVDISR_PCIE4); /* disable */
871 #endif
872 
873  	return busno;
874 }
875 #else
876 int fsl_pcie_init_ctrl(int busno, u32 devdisr, enum srds_prtcl dev,
877 			struct fsl_pci_info *pci_info)
878 {
879 	return busno;
880 }
881 
882 int fsl_pcie_init_board(int busno)
883 {
884 	return busno;
885 }
886 #endif
887 
888 #ifdef CONFIG_OF_BOARD_SETUP
889 #include <libfdt.h>
890 #include <fdt_support.h>
891 
892 void ft_fsl_pci_setup(void *blob, const char *pci_compat,
893 			unsigned long ctrl_addr)
894 {
895 	int off;
896 	u32 bus_range[2];
897 	phys_addr_t p_ctrl_addr = (phys_addr_t)ctrl_addr;
898 	struct pci_controller *hose;
899 
900 	hose = find_hose_by_cfg_addr((void *)(ctrl_addr));
901 
902 	/* convert ctrl_addr to true physical address */
903 	p_ctrl_addr = (phys_addr_t)ctrl_addr - CONFIG_SYS_CCSRBAR;
904 	p_ctrl_addr += CONFIG_SYS_CCSRBAR_PHYS;
905 
906 	off = fdt_node_offset_by_compat_reg(blob, pci_compat, p_ctrl_addr);
907 
908 	if (off < 0)
909 		return;
910 
911 	/* We assume a cfg_addr not being set means we didn't setup the controller */
912 	if ((hose == NULL) || (hose->cfg_addr == NULL)) {
913 		fdt_del_node(blob, off);
914 	} else {
915 		bus_range[0] = 0;
916 		bus_range[1] = hose->last_busno - hose->first_busno;
917 		fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
918 		fdt_pci_dma_ranges(blob, off, hose);
919 	}
920 }
921 #endif
922