2 * Copyright 2007-2009 Freescale Semiconductor, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * Version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 DECLARE_GLOBAL_DATA_PTR;
24 * PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
26 * Initialize controller and call the common driver/pci pci_hose_scan to
27 * scan for bridges and devices.
29 * Hose fields which need to be pre-initialized by board specific code:
39 #include <asm/fsl_pci.h>
41 /* Freescale-specific PCI config registers */
42 #define FSL_PCI_PBFR 0x44
43 #define FSL_PCIE_CAP_ID 0x4c
44 #define FSL_PCIE_CFG_RDY 0x4b0
45 #define FSL_PROG_IF_AGENT 0x1
47 void pciauto_prescan_setup_bridge(struct pci_controller *hose,
48 pci_dev_t dev, int sub_bus);
49 void pciauto_postscan_setup_bridge(struct pci_controller *hose,
50 pci_dev_t dev, int sub_bus);
51 void pciauto_config_init(struct pci_controller *hose);
53 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
54 #define CONFIG_SYS_PCI_MEMORY_BUS 0
57 #ifndef CONFIG_SYS_PCI_MEMORY_PHYS
58 #define CONFIG_SYS_PCI_MEMORY_PHYS 0
61 #if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
62 #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
65 /* Setup one inbound ATMU window.
67 * We let the caller decide what the window size should be
69 static void set_inbound_window(volatile pit_t *pi,
73 u32 sz = (__ilog2_u64(size) - 1);
74 u32 flag = PIWAR_EN | PIWAR_LOCAL |
75 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
77 out_be32(&pi->pitar, r->phys_start >> 12);
78 out_be32(&pi->piwbar, r->bus_start >> 12);
79 #ifdef CONFIG_SYS_PCI_64BIT
80 out_be32(&pi->piwbear, r->bus_start >> 44);
82 out_be32(&pi->piwbear, 0);
84 if (r->flags & PCI_REGION_PREFETCH)
86 out_be32(&pi->piwar, flag | sz);
89 static int fsl_pci_setup_inbound_windows(struct pci_controller *hose,
90 u64 out_lo, u8 pcie_cap,
93 struct pci_region *r = hose->regions + hose->region_count;
94 u64 sz = min((u64)gd->ram_size, (1ull << 32));
96 phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
97 pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
100 /* we have no space available for inbound memory mapping */
101 if (bus_start > out_lo) {
102 printf ("no space for inbound mapping of memory\n");
107 if ((bus_start + sz) > out_lo) {
108 sz = out_lo - bus_start;
109 debug ("limiting size to %llx\n", sz);
112 pci_sz = 1ull << __ilog2_u64(sz);
114 * we can overlap inbound/outbound windows on PCI-E since RX & TX
117 if ((pcie_cap == PCI_CAP_ID_EXP) && (pci_sz < sz)) {
118 debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
119 (u64)bus_start, (u64)phys_start, (u64)sz);
120 pci_set_region(r, bus_start, phys_start, sz,
121 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
122 PCI_REGION_PREFETCH);
124 /* if we aren't an exact power of two match, pci_sz is smaller
125 * round it up to the next power of two. We report the actual
126 * size to pci region tracking.
129 sz = 2ull << __ilog2_u64(sz);
131 set_inbound_window(pi--, r++, sz);
132 sz = 0; /* make sure we dont set the R2 window */
134 debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
135 (u64)bus_start, (u64)phys_start, (u64)pci_sz);
136 pci_set_region(r, bus_start, phys_start, pci_sz,
137 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
138 PCI_REGION_PREFETCH);
139 set_inbound_window(pi--, r++, pci_sz);
143 phys_start += pci_sz;
145 pci_sz = 1ull << __ilog2_u64(sz);
147 debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
148 (u64)bus_start, (u64)phys_start, (u64)pci_sz);
149 pci_set_region(r, bus_start, phys_start, pci_sz,
150 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
151 PCI_REGION_PREFETCH);
152 set_inbound_window(pi--, r++, pci_sz);
155 phys_start += pci_sz;
159 #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
161 * On 64-bit capable systems, set up a mapping for all of DRAM
162 * in high pci address space.
164 pci_sz = 1ull << __ilog2_u64(gd->ram_size);
165 /* round up to the next largest power of two */
166 if (gd->ram_size > pci_sz)
167 pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
168 debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
169 (u64)CONFIG_SYS_PCI64_MEMORY_BUS,
170 (u64)CONFIG_SYS_PCI_MEMORY_PHYS,
173 CONFIG_SYS_PCI64_MEMORY_BUS,
174 CONFIG_SYS_PCI_MEMORY_PHYS,
176 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
177 PCI_REGION_PREFETCH);
178 set_inbound_window(pi--, r++, pci_sz);
180 pci_sz = 1ull << __ilog2_u64(sz);
182 debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
183 (u64)bus_start, (u64)phys_start, (u64)pci_sz);
184 pci_set_region(r, bus_start, phys_start, pci_sz,
185 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
186 PCI_REGION_PREFETCH);
189 phys_start += pci_sz;
190 set_inbound_window(pi--, r++, pci_sz);
194 #ifdef CONFIG_PHYS_64BIT
195 if (sz && (((u64)gd->ram_size) < (1ull << 32)))
196 printf("Was not able to map all of memory via "
197 "inbound windows -- %lld remaining\n", sz);
200 hose->region_count = r - hose->regions;
205 void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
209 int enabled, r, inbound = 0;
212 volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)cfg_addr;
213 struct pci_region *reg = hose->regions + hose->region_count;
214 pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
216 /* Initialize ATMU registers based on hose regions and flags */
217 volatile pot_t *po = &pci->pot[1]; /* skip 0 */
218 volatile pit_t *pi = &pci->pit[2]; /* ranges from: 3 to 1 */
220 u64 out_hi = 0, out_lo = -1ULL;
221 u32 pcicsrbar, pcicsrbar_sz;
227 pci_setup_indirect(hose, cfg_addr, cfg_data);
229 /* Handle setup of outbound windows first */
230 for (r = 0; r < hose->region_count; r++) {
231 unsigned long flags = hose->regions[r].flags;
232 u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);
234 flags &= PCI_REGION_SYS_MEMORY|PCI_REGION_TYPE;
235 if (flags != PCI_REGION_SYS_MEMORY) {
236 u64 start = hose->regions[r].bus_start;
237 u64 end = start + hose->regions[r].size;
239 out_be32(&po->powbar, hose->regions[r].phys_start >> 12);
240 out_be32(&po->potar, start >> 12);
241 #ifdef CONFIG_SYS_PCI_64BIT
242 out_be32(&po->potear, start >> 44);
244 out_be32(&po->potear, 0);
246 if (hose->regions[r].flags & PCI_REGION_IO) {
247 out_be32(&po->powar, POWAR_EN | sz |
248 POWAR_IO_READ | POWAR_IO_WRITE);
250 out_be32(&po->powar, POWAR_EN | sz |
251 POWAR_MEM_READ | POWAR_MEM_WRITE);
252 out_lo = min(start, out_lo);
253 out_hi = max(end, out_hi);
258 debug("Outbound memory range: %llx:%llx\n", out_lo, out_hi);
260 /* setup PCSRBAR/PEXCSRBAR */
261 pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, 0xffffffff);
262 pci_hose_read_config_dword (hose, dev, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
263 pcicsrbar_sz = ~pcicsrbar_sz + 1;
265 if (out_hi < (0x100000000ull - pcicsrbar_sz) ||
266 (out_lo > 0x100000000ull))
267 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
269 pcicsrbar = (out_lo - pcicsrbar_sz) & -pcicsrbar_sz;
270 pci_hose_write_config_dword(hose, dev, PCI_BASE_ADDRESS_0, pcicsrbar);
272 out_lo = min(out_lo, (u64)pcicsrbar);
274 debug("PCICSRBAR @ 0x%x\n", pcicsrbar);
276 pci_set_region(reg++, pcicsrbar, CONFIG_SYS_CCSRBAR_PHYS,
277 pcicsrbar_sz, PCI_REGION_SYS_MEMORY);
278 hose->region_count++;
280 /* see if we are a PCIe or PCI controller */
281 pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
284 inbound = fsl_pci_setup_inbound_windows(hose, out_lo, pcie_cap, pi);
286 for (r = 0; r < hose->region_count; r++)
287 debug("PCI reg:%d %016llx:%016llx %016llx %08x\n", r,
288 (u64)hose->regions[r].phys_start,
289 hose->regions[r].bus_start,
290 hose->regions[r].size,
291 hose->regions[r].flags);
293 pci_register_hose(hose);
294 pciauto_config_init(hose); /* grab pci_{mem,prefetch,io} */
295 hose->current_busno = hose->first_busno;
297 out_be32(&pci->pedr, 0xffffffff); /* Clear any errors */
298 out_be32(&pci->peer, ~0x20140); /* Enable All Error Interupts except
299 * - Master abort (pci)
300 * - Master PERR (pci)
303 pci_hose_read_config_dword(hose, dev, PCI_DCR, &temp32);
304 temp32 |= 0xf000e; /* set URR, FER, NFER (but not CER) */
305 pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);
307 if (pcie_cap == PCI_CAP_ID_EXP) {
308 pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm);
309 enabled = ltssm >= PCI_LTSSM_L0;
311 #ifdef CONFIG_FSL_PCIE_RESET
314 debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm);
315 /* assert PCIe reset */
316 setbits_be32(&pci->pdb_stat, 0x08000000);
317 (void) in_be32(&pci->pdb_stat);
319 debug(" Asserting PCIe reset @%x = %x\n",
320 &pci->pdb_stat, in_be32(&pci->pdb_stat));
321 /* clear PCIe reset */
322 clrbits_be32(&pci->pdb_stat, 0x08000000);
324 for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
325 pci_hose_read_config_word(hose, dev, PCI_LTSSM,
328 debug("....PCIe link error. "
329 "LTSSM=0x%02x.\n", ltssm);
331 enabled = ltssm >= PCI_LTSSM_L0;
333 /* we need to re-write the bar0 since a reset will
336 pci_hose_write_config_dword(hose, dev,
337 PCI_BASE_ADDRESS_0, pcicsrbar);
342 debug("....PCIE link error. Skipping scan."
343 "LTSSM=0x%02x\n", ltssm);
344 hose->last_busno = hose->first_busno;
348 out_be32(&pci->pme_msg_det, 0xffffffff);
349 out_be32(&pci->pme_msg_int_en, 0xffffffff);
351 pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
352 neg_link_w = (temp16 & 0x3f0 ) >> 4;
353 printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n",
356 hose->current_busno++; /* Start scan with secondary */
357 pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
360 /* Use generic setup_device to initialize standard pci regs,
361 * but do not allocate any windows since any BAR found (such
362 * as PCSRBAR) is not in this cpu's memory space.
364 pciauto_setup_device(hose, dev, 0, hose->pci_mem,
365 hose->pci_prefetch, hose->pci_io);
368 pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
369 pci_hose_write_config_word(hose, dev, PCI_COMMAND,
370 temp16 | PCI_COMMAND_MEMORY);
373 #ifndef CONFIG_PCI_NOSCAN
374 pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8);
376 /* Programming Interface (PCI_CLASS_PROG)
377 * 0 == pci host or pcie root-complex,
378 * 1 == pci agent or pcie end-point
381 printf(" Scanning PCI bus %02x\n",
382 hose->current_busno);
383 hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
385 debug(" Not scanning PCI bus %02x. PI=%x\n",
386 hose->current_busno, temp8);
387 hose->last_busno = hose->current_busno;
390 /* if we are PCIe - update limit regs and subordinate busno
391 * for the virtual P2P bridge
393 if (pcie_cap == PCI_CAP_ID_EXP) {
394 pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
397 hose->last_busno = hose->current_busno;
400 /* Clear all error indications */
401 if (pcie_cap == PCI_CAP_ID_EXP)
402 out_be32(&pci->pme_msg_det, 0xffffffff);
403 out_be32(&pci->pedr, 0xffffffff);
405 pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
407 pci_hose_write_config_word(hose, dev, PCI_DSR, 0xffff);
410 pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
412 pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
416 int fsl_is_pci_agent(struct pci_controller *hose)
419 pci_dev_t dev = PCI_BDF(hose->first_busno, 0, 0);
421 pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &prog_if);
423 return (prog_if == FSL_PROG_IF_AGENT);
426 int fsl_pci_init_port(struct fsl_pci_info *pci_info,
427 struct pci_controller *hose, int busno)
429 volatile ccsr_fsl_pci_t *pci;
430 struct pci_region *r;
432 pci = (ccsr_fsl_pci_t *) pci_info->regs;
434 /* on non-PCIe controllers we don't have pme_msg_det so this code
435 * should do nothing since the read will return 0
437 if (in_be32(&pci->pme_msg_det)) {
438 out_be32(&pci->pme_msg_det, 0xffffffff);
439 debug (" with errors. Clearing. Now 0x%08x",
443 r = hose->regions + hose->region_count;
445 /* outbound memory */
459 hose->region_count = r - hose->regions;
460 hose->first_busno = busno;
462 fsl_pci_init(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);
464 if (fsl_is_pci_agent(hose)) {
465 fsl_pci_config_unlock(hose);
466 hose->last_busno = hose->first_busno;
469 printf(" PCIE%x on bus %02x - %02x\n", pci_info->pci_num,
470 hose->first_busno, hose->last_busno);
472 return(hose->last_busno + 1);
475 /* Enable inbound PCI config cycles for agent/endpoint interface */
476 void fsl_pci_config_unlock(struct pci_controller *hose)
478 pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
483 pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
487 pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
488 if (pcie_cap != 0x0) {
489 /* PCIe - set CFG_READY bit of Configuration Ready Register */
490 pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
492 /* PCI - clear ACL bit of PBFR */
493 pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
495 pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
499 #ifdef CONFIG_OF_BOARD_SETUP
501 #include <fdt_support.h>
503 void ft_fsl_pci_setup(void *blob, const char *pci_alias,
504 struct pci_controller *hose)
506 int off = fdt_path_offset(blob, pci_alias);
512 bus_range[1] = hose->last_busno - hose->first_busno;
513 fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
514 fdt_pci_dma_ranges(blob, off, hose);