1 /*-----------------------------------------------------------------------------+
3 * This source code has been made available to you by IBM on an AS-IS
4 * basis. Anyone receiving this source is licensed under IBM
5 * copyrights to use it in any way he or she deems fit, including
6 * copying it, modifying it, compiling it, and redistributing it either
7 * with or without modifications. No license under IBM patents or
8 * patent applications is to be implied by the copyright license.
10 * Any user of this software should understand that IBM cannot provide
11 * technical support for this software and will not be responsible for
12 * any consequences resulting from the use of this software.
14 * Any person who transfers this source code or any derivative work
15 * must include the IBM copyright notice, this paragraph, and the
16 * preceding two paragraphs in the transferred software.
18 * COPYRIGHT I B M CORPORATION 1995
19 * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
20 *-----------------------------------------------------------------------------*/
21 /*----------------------------------------------------------------------------+
23 * File Name: 405gp_pci.c
25 * Function: Initialization code for the 405GP PCI Configuration regs.
31 * Date Description of Change BY
32 * --------- --------------------- ---
33 * 09-Sep-98 Created MCG
34 * 02-Nov-98 Removed External arbiter selected message JWB
35 * 27-Nov-98 Zero out PTMBAR2 and disable in PTM2MS JWB
36 * 04-Jan-99 Zero out other unused PMM and PTM regs. Change bus scan MCG
37 * from (0 to n) to (1 to n).
38 * 17-May-99 Port to Walnut JWB
39 * 17-Jun-99 Updated for VGA support JWB
40 * 21-Jun-99 Updated to allow SRAM region to be a target from PCI bus JWB
41 * 19-Jul-99 Updated for 405GP pass 1 errata #26 (Low PCI subsequent MCG
42 * target latency timer values are not supported).
43 * Should be fixed in pass 2.
44 * 09-Sep-99 Removed use of PTM2 since the SRAM region no longer needs JWB
45 * to be a PCI target. Zero out PTMBAR2 and disable in PTM2MS.
46 * 10-Dec-99 Updated PCI_Write_CFG_Reg for pass2 errata #6 JWB
47 * 11-Jan-00 Ensure PMMxMAs disabled before setting PMMxLAs. This is not
48 * really required after a reset since PMMxMAs are already
49 * disabled but is a good practice nonetheless. JWB
51 * - PCI host/adapter handling reworked
53 * - PCI host now configures from device 0 (not 1) to max_dev,
54 * (host configures itself)
55 * - On CPCI-405 pci base address and size is generated from
56 * SDRAM and FLASH size (CFG regs not used anymore)
57 * - Some minor changes for CPCI-405-A (adapter version)
59 * - CONFIG_PCI_SCAN_SHOW added to print pci devices upon startup
61 * - Changed pci master configuration for linux compatibility
62 * (no need for bios_fixup() anymore)
64 * - Bug fixed in pci configuration (Andrew May)
65 * - Removed pci class code init for CPCI405 board
67 * - New vga device handling
69 * - PCI class code init added (if defined)
70 *----------------------------------------------------------------------------*/
74 #if !defined(CONFIG_440)
75 #include <405gp_pci.h>
77 #include <asm/processor.h>
80 DECLARE_GLOBAL_DATA_PTR;
82 #if defined(CONFIG_405GP) || defined(CONFIG_405EP)
86 #if defined(CONFIG_PMC405)
87 ushort pmc405_pci_subsys_deviceid(void);
92 /*-----------------------------------------------------------------------------+
93 * pci_init. Initializes the 405GP PCI Configuration regs.
94 *-----------------------------------------------------------------------------*/
95 void pci_405gp_init(struct pci_controller *hose)
100 unsigned short temp_short;
101 unsigned long ptmpcila[2] = {CFG_PCI_PTM1PCI, CFG_PCI_PTM2PCI};
102 #if defined(CONFIG_CPCI405) || defined(CONFIG_PMC405)
103 char *ptmla_str, *ptmms_str;
105 unsigned long ptmla[2] = {CFG_PCI_PTM1LA, CFG_PCI_PTM2LA};
106 unsigned long ptmms[2] = {CFG_PCI_PTM1MS, CFG_PCI_PTM2MS};
107 #if defined(CONFIG_PIP405) || defined (CONFIG_MIP405)
108 unsigned long pmmla[3] = {0x80000000, 0xA0000000, 0};
109 unsigned long pmmma[3] = {0xE0000001, 0xE0000001, 0};
110 unsigned long pmmpcila[3] = {0x80000000, 0x00000000, 0};
111 unsigned long pmmpciha[3] = {0x00000000, 0x00000000, 0};
113 unsigned long pmmla[3] = {0x80000000, 0,0};
114 unsigned long pmmma[3] = {0xC0000001, 0,0};
115 unsigned long pmmpcila[3] = {0x80000000, 0,0};
116 unsigned long pmmpciha[3] = {0x00000000, 0,0};
118 #ifdef CONFIG_PCI_PNP
119 #if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
124 #if defined(CONFIG_CPCI405) || defined(CONFIG_PMC405)
125 ptmla_str = getenv("ptm1la");
126 ptmms_str = getenv("ptm1ms");
127 if(NULL != ptmla_str && NULL != ptmms_str ) {
128 ptmla[0] = simple_strtoul (ptmla_str, NULL, 16);
129 ptmms[0] = simple_strtoul (ptmms_str, NULL, 16);
132 ptmla_str = getenv("ptm2la");
133 ptmms_str = getenv("ptm2ms");
134 if(NULL != ptmla_str && NULL != ptmms_str ) {
135 ptmla[1] = simple_strtoul (ptmla_str, NULL, 16);
136 ptmms[1] = simple_strtoul (ptmms_str, NULL, 16);
143 hose->first_busno = 0;
144 hose->last_busno = 0xff;
146 /* ISA/PCI I/O space */
147 pci_set_region(hose->regions + reg_num++,
154 pci_set_region(hose->regions + reg_num++,
166 if (!i) hose->pci_fb = hose->regions + reg_num;
168 pci_set_region(hose->regions + reg_num++,
169 ptmpcila[i], ptmla[i],
170 ~(ptmms[i] & 0xfffff000) + 1,
175 /* PCI memory spaces */
179 pci_set_region(hose->regions + reg_num++,
180 pmmpcila[i], pmmla[i],
181 ~(pmmma[i] & 0xfffff000) + 1,
185 hose->region_count = reg_num;
187 pci_setup_indirect(hose,
192 pciauto_region_init(hose->pci_fb);
194 pci_register_hose(hose);
196 /*--------------------------------------------------------------------------+
197 * 405GP PCI Master configuration.
198 * Map one 512 MB range of PLB/processor addresses to PCI memory space.
199 * PLB address 0x80000000-0xBFFFFFFF ==> PCI address 0x80000000-0xBFFFFFFF
200 * Use byte reversed out routines to handle endianess.
201 *--------------------------------------------------------------------------*/
202 out32r(PMM0MA, (pmmma[0]&~0x1)); /* disable, configure PMMxLA, PMMxPCILA first */
203 out32r(PMM0LA, pmmla[0]);
204 out32r(PMM0PCILA, pmmpcila[0]);
205 out32r(PMM0PCIHA, pmmpciha[0]);
206 out32r(PMM0MA, pmmma[0]);
208 /*--------------------------------------------------------------------------+
209 * PMM1 is not used. Initialize them to zero.
210 *--------------------------------------------------------------------------*/
211 out32r(PMM1MA, (pmmma[1]&~0x1));
212 out32r(PMM1LA, pmmla[1]);
213 out32r(PMM1PCILA, pmmpcila[1]);
214 out32r(PMM1PCIHA, pmmpciha[1]);
215 out32r(PMM1MA, pmmma[1]);
217 /*--------------------------------------------------------------------------+
218 * PMM2 is not used. Initialize them to zero.
219 *--------------------------------------------------------------------------*/
220 out32r(PMM2MA, (pmmma[2]&~0x1));
221 out32r(PMM2LA, pmmla[2]);
222 out32r(PMM2PCILA, pmmpcila[2]);
223 out32r(PMM2PCIHA, pmmpciha[2]);
224 out32r(PMM2MA, pmmma[2]);
226 /*--------------------------------------------------------------------------+
227 * 405GP PCI Target configuration. (PTM1)
228 * Note: PTM1MS is hardwire enabled but we set the enable bit anyway.
229 *--------------------------------------------------------------------------*/
230 out32r(PTM1LA, ptmla[0]); /* insert address */
231 out32r(PTM1MS, ptmms[0]); /* insert size, enable bit is 1 */
232 pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_1, ptmpcila[0]);
234 /*--------------------------------------------------------------------------+
235 * 405GP PCI Target configuration. (PTM2)
236 *--------------------------------------------------------------------------*/
237 out32r(PTM2LA, ptmla[1]); /* insert address */
238 pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2, ptmpcila[1]);
242 out32r(PTM2MS, 0x00000001); /* set enable bit */
243 pci_write_config_dword(PCIDEVID_405GP, PCI_BASE_ADDRESS_2, 0x00000000);
244 out32r(PTM2MS, 0x00000000); /* disable */
248 out32r(PTM2MS, ptmms[1]); /* insert size, enable bit is 1 */
252 * Insert Subsystem Vendor and Device ID
254 pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_VENDOR_ID, CFG_PCI_SUBSYS_VENDORID);
255 #ifdef CONFIG_CPCI405
256 if (mfdcr(strap) & PSR_PCI_ARBIT_EN)
257 pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_DEVICEID);
259 pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_DEVICEID2);
261 pci_write_config_word(PCIDEVID_405GP, PCI_SUBSYSTEM_ID, CFG_PCI_SUBSYS_DEVICEID);
267 #ifdef CFG_PCI_CLASSCODE
268 pci_write_config_word(PCIDEVID_405GP, PCI_CLASS_SUB_CODE, CFG_PCI_CLASSCODE);
269 #endif /* CFG_PCI_CLASSCODE */
271 /*--------------------------------------------------------------------------+
272 * If PCI speed = 66Mhz, set 66Mhz capable bit.
273 *--------------------------------------------------------------------------*/
274 if (bd->bi_pci_busfreq >= 66000000) {
275 pci_read_config_word(PCIDEVID_405GP, PCI_STATUS, &temp_short);
276 pci_write_config_word(PCIDEVID_405GP,PCI_STATUS,(temp_short|PCI_STATUS_66MHZ));
279 #if (CONFIG_PCI_HOST != PCI_HOST_ADAPTER)
280 #if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
281 if ((mfdcr(strap) & PSR_PCI_ARBIT_EN) ||
282 (((s = getenv("pciscan")) != NULL) && (strcmp(s, "yes") == 0)))
285 /*--------------------------------------------------------------------------+
286 * Write the 405GP PCI Configuration regs.
287 * Enable 405GP to be a master on the PCI bus (PMM).
288 * Enable 405GP to act as a PCI memory target (PTM).
289 *--------------------------------------------------------------------------*/
290 pci_read_config_word(PCIDEVID_405GP, PCI_COMMAND, &temp_short);
291 pci_write_config_word(PCIDEVID_405GP, PCI_COMMAND, temp_short |
292 PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
296 #if defined(CONFIG_405EP) /* on ppc405ep vendor id is not set */
297 pci_write_config_word(PCIDEVID_405GP, PCI_VENDOR_ID, 0x1014); /* IBM */
301 * Set HCE bit (Host Configuration Enabled)
303 pci_read_config_word(PCIDEVID_405GP, PCIBRDGOPT2, &temp_short);
304 pci_write_config_word(PCIDEVID_405GP, PCIBRDGOPT2, (temp_short | 0x0001));
306 #ifdef CONFIG_PCI_PNP
307 /*--------------------------------------------------------------------------+
308 * Scan the PCI bus and configure devices found.
309 *--------------------------------------------------------------------------*/
310 #if (CONFIG_PCI_HOST == PCI_HOST_AUTO)
311 if ((mfdcr(strap) & PSR_PCI_ARBIT_EN) ||
312 (((s = getenv("pciscan")) != NULL) && (strcmp(s, "yes") == 0)))
315 #ifdef CONFIG_PCI_SCAN_SHOW
316 printf("PCI: Bus Dev VenId DevId Class Int\n");
318 hose->last_busno = pci_hose_scan(hose);
320 #endif /* CONFIG_PCI_PNP */
325 * drivers/pci.c skips every host bridge but the 405GP since it could
326 * be set as an Adapter.
328 * I (Andrew May) don't know what we should do here, but I don't want
329 * the auto setup of a PCI device disabling what is done pci_405gp_init
330 * as has happened before.
332 void pci_405gp_setup_bridge(struct pci_controller *hose, pci_dev_t dev,
333 struct pci_config_table *entry)
336 printf("405gp_setup_bridge\n");
344 void pci_405gp_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
346 unsigned char int_line = 0xff;
349 * Write pci interrupt line register (cpci405 specific)
351 switch (PCI_DEV(dev) & 0x03)
367 pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, int_line);
370 void pci_405gp_setup_vga(struct pci_controller *hose, pci_dev_t dev,
371 struct pci_config_table *entry)
373 unsigned int cmdstat = 0;
375 pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
377 /* always enable io space on vga boards */
378 pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &cmdstat);
379 cmdstat |= PCI_COMMAND_IO;
380 pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat);
383 #if !(defined(CONFIG_PIP405) || defined (CONFIG_MIP405)) && !(defined (CONFIG_SC3))
386 *As is these functs get called out of flash Not a horrible
387 *thing, but something to keep in mind. (no statics?)
389 static struct pci_config_table pci_405gp_config_table[] = {
390 /*if VendID is 0 it terminates the table search (ie Walnut)*/
391 #ifdef CFG_PCI_SUBSYS_VENDORID
392 {CFG_PCI_SUBSYS_VENDORID, PCI_ANY_ID, PCI_CLASS_BRIDGE_HOST,
393 PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_bridge},
395 {PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA,
396 PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_vga},
398 {PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NOT_DEFINED_VGA,
399 PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, pci_405gp_setup_vga},
404 static struct pci_controller hose = {
405 fixup_irq: pci_405gp_fixup_irq,
406 config_table: pci_405gp_config_table,
409 void pci_init_board(void)
411 /*we want the ptrs to RAM not flash (ie don't use init list)*/
412 hose.fixup_irq = pci_405gp_fixup_irq;
413 hose.config_table = pci_405gp_config_table;
414 pci_405gp_init(&hose);
419 #endif /* CONFIG_PCI */
421 #endif /* CONFIG_405GP */
423 /*-----------------------------------------------------------------------------+
425 *-----------------------------------------------------------------------------*/
426 #if defined(CONFIG_440) && defined(CONFIG_PCI)
428 static struct pci_controller ppc440_hose = {0};
431 void pci_440_init (struct pci_controller *hose)
435 #ifndef CONFIG_DISABLE_PISE_TEST
436 /*--------------------------------------------------------------------------+
437 * The PCI initialization sequence enable bit must be set ... if not abort
438 * pci setup since updating the bit requires chip reset.
439 *--------------------------------------------------------------------------*/
440 #if defined(CONFIG_440GX) || defined(CONFIG_440SP) || defined(CONFIG_440SPE)
443 mfsdr(sdr_sdstp1,strap);
444 if ((strap & SDR0_SDSTP1_PISE_MASK) == 0) {
445 printf("PCI: SDR0_STRP1[PISE] not set.\n");
446 printf("PCI: Configuration aborted.\n");
449 #elif defined(CONFIG_440GP)
452 strap = mfdcr(cpc0_strp1);
453 if ((strap & CPC0_STRP1_PISE_MASK) == 0) {
454 printf("PCI: CPC0_STRP1[PISE] not set.\n");
455 printf("PCI: Configuration aborted.\n");
459 #endif /* CONFIG_DISABLE_PISE_TEST */
461 /*--------------------------------------------------------------------------+
462 * PCI controller init
463 *--------------------------------------------------------------------------*/
464 hose->first_busno = 0;
465 hose->last_busno = 0xff;
468 pci_set_region(hose->regions + reg_num++,
474 /* PCI memory space */
475 pci_set_region(hose->regions + reg_num++,
478 #ifdef CFG_PCI_MEMSIZE
485 #if defined(CONFIG_PCI_SYS_MEM_BUS) && defined(CONFIG_PCI_SYS_MEM_PHYS) && \
486 defined(CONFIG_PCI_SYS_MEM_SIZE)
487 /* System memory space */
488 pci_set_region(hose->regions + reg_num++,
489 CONFIG_PCI_SYS_MEM_BUS,
490 CONFIG_PCI_SYS_MEM_PHYS,
491 CONFIG_PCI_SYS_MEM_SIZE,
492 PCI_REGION_MEM | PCI_REGION_MEMORY );
495 hose->region_count = reg_num;
497 pci_setup_indirect(hose, PCIX0_CFGADR, PCIX0_CFGDATA);
499 #if defined(CFG_PCI_PRE_INIT)
500 /* Let board change/modify hose & do initial checks */
501 if (pci_pre_init (hose) == 0) {
502 printf("PCI: Board-specific initialization failed.\n");
503 printf("PCI: Configuration aborted.\n");
508 pci_register_hose( hose );
510 /*--------------------------------------------------------------------------+
512 *--------------------------------------------------------------------------*/
513 #if defined(CFG_PCI_TARGET_INIT)
514 pci_target_init(hose); /* Let board setup pci target */
516 out16r( PCIX0_SBSYSVID, CFG_PCI_SUBSYS_VENDORID );
517 out16r( PCIX0_SBSYSID, CFG_PCI_SUBSYS_ID );
518 out16r( PCIX0_CLS, 0x00060000 ); /* Bridge, host bridge */
521 #if defined(CONFIG_440GX) || defined(CONFIG_440SPE)
522 out32r( PCIX0_BRDGOPT1, 0x04000060 ); /* PLB Rq pri highest */
523 out32r( PCIX0_BRDGOPT2, in32(PCIX0_BRDGOPT2) | 0x83 ); /* Enable host config, clear Timeout, ensure int src1 */
524 #elif defined(PCIX0_BRDGOPT1)
525 out32r( PCIX0_BRDGOPT1, 0x10000060 ); /* PLB Rq pri highest */
526 out32r( PCIX0_BRDGOPT2, in32(PCIX0_BRDGOPT2) | 1 ); /* Enable host config */
529 /*--------------------------------------------------------------------------+
530 * PCI master init: default is one 256MB region for PCI memory:
531 * 0x3_00000000 - 0x3_0FFFFFFF ==> CFG_PCI_MEMBASE
532 *--------------------------------------------------------------------------*/
533 #if defined(CFG_PCI_MASTER_INIT)
534 pci_master_init(hose); /* Let board setup pci master */
536 out32r( PCIX0_POM0SA, 0 ); /* disable */
537 out32r( PCIX0_POM1SA, 0 ); /* disable */
538 out32r( PCIX0_POM2SA, 0 ); /* disable */
539 #if defined(CONFIG_440SPE)
540 out32r( PCIX0_POM0LAL, 0x10000000 );
541 out32r( PCIX0_POM0LAH, 0x0000000c );
543 out32r( PCIX0_POM0LAL, 0x00000000 );
544 out32r( PCIX0_POM0LAH, 0x00000003 );
546 out32r( PCIX0_POM0PCIAL, CFG_PCI_MEMBASE );
547 out32r( PCIX0_POM0PCIAH, 0x00000000 );
548 out32r( PCIX0_POM0SA, 0xf0000001 ); /* 256MB, enabled */
549 out32r( PCIX0_STS, in32r( PCIX0_STS ) & ~0x0000fff8 );
552 /*--------------------------------------------------------------------------+
553 * PCI host configuration -- we don't make any assumptions here ... the
554 * _board_must_indicate_ what to do -- there's just too many runtime
555 * scenarios in environments like cPCI, PPMC, etc. to make a determination
556 * based on hard-coded values or state of arbiter enable.
557 *--------------------------------------------------------------------------*/
558 if (is_pci_host(hose)) {
559 #ifdef CONFIG_PCI_SCAN_SHOW
560 printf("PCI: Bus Dev VenId DevId Class Int\n");
562 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) && \
563 !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX)
564 out16r( PCIX0_CMD, in16r( PCIX0_CMD ) | PCI_COMMAND_MASTER);
566 hose->last_busno = pci_hose_scan(hose);
570 void pci_init_board(void)
572 pci_440_init (&ppc440_hose);
573 #if defined(CONFIG_440SPE)
578 #endif /* CONFIG_440 & CONFIG_PCI */