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pci/fsl_pci_init: Fold pci_setup_indirect into fsl_pci_init
[karo-tx-uboot.git] / drivers / pci / fsl_pci_init.c
1 /*
2  * Copyright 2007 Freescale Semiconductor, Inc.
3  *
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.
7  *
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.
12  *
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,
16  * MA 02111-1307 USA
17  */
18
19 #include <common.h>
20
21 DECLARE_GLOBAL_DATA_PTR;
22
23 /*
24  * PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
25  *
26  * Initialize controller and call the common driver/pci pci_hose_scan to
27  * scan for bridges and devices.
28  *
29  * Hose fields which need to be pre-initialized by board specific code:
30  *   regions[]
31  *   first_busno
32  *
33  * Fields updated:
34  *   last_busno
35  */
36
37 #include <pci.h>
38 #include <asm/fsl_pci.h>
39
40 /* Freescale-specific PCI config registers */
41 #define FSL_PCI_PBFR            0x44
42 #define FSL_PCIE_CAP_ID         0x4c
43 #define FSL_PCIE_CFG_RDY        0x4b0
44
45 void pciauto_prescan_setup_bridge(struct pci_controller *hose,
46                                 pci_dev_t dev, int sub_bus);
47 void pciauto_postscan_setup_bridge(struct pci_controller *hose,
48                                 pci_dev_t dev, int sub_bus);
49 void pciauto_config_init(struct pci_controller *hose);
50
51 #ifndef CONFIG_SYS_PCI_MEMORY_BUS
52 #define CONFIG_SYS_PCI_MEMORY_BUS 0
53 #endif
54
55 #ifndef CONFIG_SYS_PCI_MEMORY_PHYS
56 #define CONFIG_SYS_PCI_MEMORY_PHYS 0
57 #endif
58
59 #if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
60 #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
61 #endif
62
63 int fsl_pci_setup_inbound_windows(struct pci_region *r)
64 {
65         struct pci_region *rgn_base = r;
66         u64 sz = min((u64)gd->ram_size, (1ull << 32) - 1);
67
68         phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
69         pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
70         pci_size_t pci_sz = 1ull << __ilog2_u64(sz);
71
72         debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
73                 (u64)bus_start, (u64)phys_start, (u64)pci_sz);
74         pci_set_region(r++, bus_start, phys_start, pci_sz,
75                         PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
76                         PCI_REGION_PREFETCH);
77
78         sz -= pci_sz;
79         bus_start += pci_sz;
80         phys_start += pci_sz;
81
82         pci_sz = 1ull << __ilog2_u64(sz);
83         if (sz) {
84                 debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
85                         (u64)bus_start, (u64)phys_start, (u64)pci_sz);
86                 pci_set_region(r++, bus_start, phys_start, pci_sz,
87                                 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
88                                 PCI_REGION_PREFETCH);
89                 sz -= pci_sz;
90                 bus_start += pci_sz;
91                 phys_start += pci_sz;
92         }
93
94 #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
95         /*
96          * On 64-bit capable systems, set up a mapping for all of DRAM
97          * in high pci address space.
98          */
99         pci_sz = 1ull << __ilog2_u64(gd->ram_size);
100         /* round up to the next largest power of two */
101         if (gd->ram_size > pci_sz)
102                 pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
103         debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
104                 (u64)CONFIG_SYS_PCI64_MEMORY_BUS,
105                 (u64)CONFIG_SYS_PCI_MEMORY_PHYS,
106                 (u64)pci_sz);
107         pci_set_region(r++,
108                         CONFIG_SYS_PCI64_MEMORY_BUS,
109                         CONFIG_SYS_PCI_MEMORY_PHYS,
110                         pci_sz,
111                         PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
112                         PCI_REGION_PREFETCH);
113 #else
114         pci_sz = 1ull << __ilog2_u64(sz);
115         if (sz) {
116                 debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
117                         (u64)bus_start, (u64)phys_start, (u64)pci_sz);
118                 pci_set_region(r++, bus_start, phys_start, pci_sz,
119                                 PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
120                                 PCI_REGION_PREFETCH);
121                 sz -= pci_sz;
122                 bus_start += pci_sz;
123                 phys_start += pci_sz;
124         }
125 #endif
126
127 #ifdef CONFIG_PHYS_64BIT
128         if (sz && (((u64)gd->ram_size) < (1ull << 32)))
129                 printf("Was not able to map all of memory via "
130                         "inbound windows -- %lld remaining\n", sz);
131 #endif
132
133         return r - rgn_base;
134 }
135
136 void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
137 {
138         u16 temp16;
139         u32 temp32;
140         int busno = hose->first_busno;
141         int enabled;
142         u16 ltssm;
143         u8 temp8;
144         int r;
145         int bridge;
146         int inbound = 0;
147         volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *)cfg_addr;
148         pci_dev_t dev = PCI_BDF(busno,0,0);
149
150         /* Initialize ATMU registers based on hose regions and flags */
151         volatile pot_t *po = &pci->pot[1];      /* skip 0 */
152         volatile pit_t *pi = &pci->pit[0];      /* ranges from: 3 to 1 */
153
154 #ifdef DEBUG
155         int neg_link_w;
156 #endif
157
158         pci_setup_indirect(hose, cfg_addr, cfg_data);
159
160         for (r=0; r<hose->region_count; r++) {
161                 u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);
162                 if (hose->regions[r].flags & PCI_REGION_SYS_MEMORY) { /* inbound */
163                         u32 flag = PIWAR_EN | PIWAR_LOCAL |
164                                         PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
165                         pi->pitar = (hose->regions[r].phys_start >> 12);
166                         pi->piwbar = (hose->regions[r].bus_start >> 12);
167 #ifdef CONFIG_SYS_PCI_64BIT
168                         pi->piwbear = (hose->regions[r].bus_start >> 44);
169 #else
170                         pi->piwbear = 0;
171 #endif
172                         if (hose->regions[r].flags & PCI_REGION_PREFETCH)
173                                 flag |= PIWAR_PF;
174                         pi->piwar = flag | sz;
175                         pi++;
176                         inbound = hose->regions[r].size > 0;
177                 } else { /* Outbound */
178                         po->powbar = (hose->regions[r].phys_start >> 12);
179                         po->potar = (hose->regions[r].bus_start >> 12);
180 #ifdef CONFIG_SYS_PCI_64BIT
181                         po->potear = (hose->regions[r].bus_start >> 44);
182 #else
183                         po->potear = 0;
184 #endif
185                         if (hose->regions[r].flags & PCI_REGION_IO)
186                                 po->powar = POWAR_EN | sz |
187                                         POWAR_IO_READ | POWAR_IO_WRITE;
188                         else
189                                 po->powar = POWAR_EN | sz |
190                                         POWAR_MEM_READ | POWAR_MEM_WRITE;
191                         po++;
192                 }
193         }
194
195         pci_register_hose(hose);
196         pciauto_config_init(hose);      /* grab pci_{mem,prefetch,io} */
197         hose->current_busno = hose->first_busno;
198
199         pci->pedr = 0xffffffff;         /* Clear any errors */
200         pci->peer = ~0x20140;           /* Enable All Error Interupts except
201                                          * - Master abort (pci)
202                                          * - Master PERR (pci)
203                                          * - ICCA (PCIe)
204                                          */
205         pci_hose_read_config_dword (hose, dev, PCI_DCR, &temp32);
206         temp32 |= 0xf000e;              /* set URR, FER, NFER (but not CER) */
207         pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);
208
209         pci_hose_read_config_byte (hose, dev, PCI_HEADER_TYPE, &temp8);
210         bridge = temp8 & PCI_HEADER_TYPE_BRIDGE; /* Bridge, such as pcie */
211
212         if ( bridge ) {
213
214                 pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
215                 enabled = ltssm >= PCI_LTSSM_L0;
216
217 #ifdef CONFIG_FSL_PCIE_RESET
218                 if (ltssm == 1) {
219                         int i;
220                         debug("....PCIe link error. "
221                               "LTSSM=0x%02x.", ltssm);
222                         pci->pdb_stat |= 0x08000000; /* assert PCIe reset */
223                         temp32 = pci->pdb_stat;
224                         udelay(100);
225                         debug("  Asserting PCIe reset @%x = %x\n",
226                               &pci->pdb_stat, pci->pdb_stat);
227                         pci->pdb_stat &= ~0x08000000; /* clear reset */
228                         asm("sync;isync");
229                         for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
230                                 pci_hose_read_config_word(hose, dev, PCI_LTSSM,
231                                                         &ltssm);
232                                 udelay(1000);
233                                 debug("....PCIe link error. "
234                                       "LTSSM=0x%02x.\n", ltssm);
235                         }
236                         enabled = ltssm >= PCI_LTSSM_L0;
237                 }
238 #endif
239
240                 if (!enabled) {
241                         debug("....PCIE link error.  Skipping scan."
242                               "LTSSM=0x%02x\n", ltssm);
243                         hose->last_busno = hose->first_busno;
244                         return;
245                 }
246
247                 pci->pme_msg_det = 0xffffffff;
248                 pci->pme_msg_int_en = 0xffffffff;
249 #ifdef DEBUG
250                 pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
251                 neg_link_w = (temp16 & 0x3f0 ) >> 4;
252                 printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n",
253                       ltssm, neg_link_w);
254 #endif
255                 hose->current_busno++; /* Start scan with secondary */
256                 pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
257
258         }
259
260         /* Use generic setup_device to initialize standard pci regs,
261          * but do not allocate any windows since any BAR found (such
262          * as PCSRBAR) is not in this cpu's memory space.
263          */
264
265         pciauto_setup_device(hose, dev, 0, hose->pci_mem,
266                              hose->pci_prefetch, hose->pci_io);
267
268         if (inbound) {
269                 pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
270                 pci_hose_write_config_word(hose, dev, PCI_COMMAND,
271                                            temp16 | PCI_COMMAND_MEMORY);
272         }
273
274 #ifndef CONFIG_PCI_NOSCAN
275         pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8);
276
277         /* Programming Interface (PCI_CLASS_PROG)
278          * 0 == pci host or pcie root-complex,
279          * 1 == pci agent or pcie end-point
280          */
281         if (!temp8) {
282                 printf("               Scanning PCI bus %02x\n",
283                         hose->current_busno);
284                 hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
285         } else {
286                 debug("               Not scanning PCI bus %02x. PI=%x\n",
287                         hose->current_busno, temp8);
288                 hose->last_busno = hose->current_busno;
289         }
290
291         if ( bridge ) { /* update limit regs and subordinate busno */
292                 pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
293         }
294 #else
295         hose->last_busno = hose->current_busno;
296 #endif
297
298         /* Clear all error indications */
299
300         if (bridge)
301                 pci->pme_msg_det = 0xffffffff;
302         pci->pedr = 0xffffffff;
303
304         pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
305         if (temp16) {
306                 pci_hose_write_config_word(hose, dev,
307                                         PCI_DSR, 0xffff);
308         }
309
310         pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
311         if (temp16) {
312                 pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
313         }
314 }
315
316 /* Enable inbound PCI config cycles for agent/endpoint interface */
317 void fsl_pci_config_unlock(struct pci_controller *hose)
318 {
319         pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
320         u8 agent;
321         u8 pcie_cap;
322         u16 pbfr;
323
324         pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
325         if (!agent)
326                 return;
327
328         pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
329         if (pcie_cap != 0x0) {
330                 /* PCIe - set CFG_READY bit of Configuration Ready Register */
331                 pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
332         } else {
333                 /* PCI - clear ACL bit of PBFR */
334                 pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
335                 pbfr &= ~0x20;
336                 pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
337         }
338 }
339
340 #ifdef CONFIG_OF_BOARD_SETUP
341 #include <libfdt.h>
342 #include <fdt_support.h>
343
344 void ft_fsl_pci_setup(void *blob, const char *pci_alias,
345                         struct pci_controller *hose)
346 {
347         int off = fdt_path_offset(blob, pci_alias);
348
349         if (off >= 0) {
350                 u32 bus_range[2];
351
352                 bus_range[0] = 0;
353                 bus_range[1] = hose->last_busno - hose->first_busno;
354                 fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
355                 fdt_pci_dma_ranges(blob, off, hose);
356         }
357 }
358 #endif