5 * Copyright (c) 2005 MontaVista Software, Inc.
7 * Added support for PCI bridge on MPC8272ADS
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #include <asm/m8260_pci.h>
36 #ifdef CONFIG_OF_LIBFDT
38 #include <fdt_support.h>
41 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272 || defined CONFIG_PM826
42 DECLARE_GLOBAL_DATA_PTR;
46 * Local->PCI map (from CPU) controlled by
47 * MPC826x master window
49 * 0x80000000 - 0xBFFFFFFF CPU2PCI space PCIBR0
50 * 0xF4000000 - 0xF7FFFFFF CPU2PCI space PCIBR1
52 * 0x80000000 - 0x9FFFFFFF 0x80000000 - 0x9FFFFFFF (Outbound ATU #1)
53 * PCI Mem with prefetch
55 * 0xA0000000 - 0xBFFFFFFF 0xA0000000 - 0xBFFFFFFF (Outbound ATU #2)
56 * PCI Mem w/o prefetch
58 * 0xF4000000 - 0xF7FFFFFF 0x00000000 - 0x03FFFFFF (Outbound ATU #3)
61 * PCI->Local map (from PCI)
62 * MPC826x slave window controlled by
64 * 0x00000000 - 0x1FFFFFFF 0x00000000 - 0x1FFFFFFF (Inbound ATU #1)
65 * MPC826x local memory
69 * Slave window that allows PCI masters to access MPC826x local memory.
70 * This window is set up using the first set of Inbound ATU registers
73 #ifndef CONFIG_SYS_PCI_SLV_MEM_LOCAL
74 #define PCI_SLV_MEM_LOCAL CONFIG_SYS_SDRAM_BASE /* Local base */
76 #define PCI_SLV_MEM_LOCAL CONFIG_SYS_PCI_SLV_MEM_LOCAL
79 #ifndef CONFIG_SYS_PCI_SLV_MEM_BUS
80 #define PCI_SLV_MEM_BUS 0x00000000 /* PCI base */
82 #define PCI_SLV_MEM_BUS CONFIG_SYS_PCI_SLV_MEM_BUS
85 #ifndef CONFIG_SYS_PICMR0_MASK_ATTRIB
86 #define PICMR0_MASK_ATTRIB (PICMR_MASK_512MB | PICMR_ENABLE | \
89 #define PICMR0_MASK_ATTRIB CONFIG_SYS_PICMR0_MASK_ATTRIB
93 * These are the windows that allow the CPU to access PCI address space.
94 * All three PCI master windows, which allow the CPU to access PCI
95 * prefetch, non prefetch, and IO space (see below), must all fit within
100 #ifndef CONFIG_SYS_PCI_MSTR0_LOCAL
101 #define PCI_MSTR0_LOCAL 0x80000000 /* Local base */
103 #define PCI_MSTR0_LOCAL CONFIG_SYS_PCI_MSTR0_LOCAL
106 #ifndef CONFIG_SYS_PCIMSK0_MASK
107 #define PCIMSK0_MASK PCIMSK_1GB /* Size of window */
109 #define PCIMSK0_MASK CONFIG_SYS_PCIMSK0_MASK
113 #ifndef CONFIG_SYS_PCI_MSTR1_LOCAL
114 #define PCI_MSTR1_LOCAL 0xF4000000 /* Local base */
116 #define PCI_MSTR1_LOCAL CONFIG_SYS_PCI_MSTR1_LOCAL
119 #ifndef CONFIG_SYS_PCIMSK1_MASK
120 #define PCIMSK1_MASK PCIMSK_64MB /* Size of window */
122 #define PCIMSK1_MASK CONFIG_SYS_PCIMSK1_MASK
126 * Master window that allows the CPU to access PCI Memory (prefetch).
127 * This window will be setup with the first set of Outbound ATU registers
131 #ifndef CONFIG_SYS_PCI_MSTR_MEM_LOCAL
132 #define PCI_MSTR_MEM_LOCAL 0x80000000 /* Local base */
134 #define PCI_MSTR_MEM_LOCAL CONFIG_SYS_PCI_MSTR_MEM_LOCAL
137 #ifndef CONFIG_SYS_PCI_MSTR_MEM_BUS
138 #define PCI_MSTR_MEM_BUS 0x80000000 /* PCI base */
140 #define PCI_MSTR_MEM_BUS CONFIG_SYS_PCI_MSTR_MEM_BUS
143 #ifndef CONFIG_SYS_CPU_PCI_MEM_START
144 #define CPU_PCI_MEM_START PCI_MSTR_MEM_LOCAL
146 #define CPU_PCI_MEM_START CONFIG_SYS_CPU_PCI_MEM_START
149 #ifndef CONFIG_SYS_PCI_MSTR_MEM_SIZE
150 #define PCI_MSTR_MEM_SIZE 0x10000000 /* 256MB */
152 #define PCI_MSTR_MEM_SIZE CONFIG_SYS_PCI_MSTR_MEM_SIZE
155 #ifndef CONFIG_SYS_POCMR0_MASK_ATTRIB
156 #define POCMR0_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PREFETCH_EN)
158 #define POCMR0_MASK_ATTRIB CONFIG_SYS_POCMR0_MASK_ATTRIB
162 * Master window that allows the CPU to access PCI Memory (non-prefetch).
163 * This window will be setup with the second set of Outbound ATU registers
167 #ifndef CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL
168 #define PCI_MSTR_MEMIO_LOCAL 0x90000000 /* Local base */
170 #define PCI_MSTR_MEMIO_LOCAL CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL
173 #ifndef CONFIG_SYS_PCI_MSTR_MEMIO_BUS
174 #define PCI_MSTR_MEMIO_BUS 0x90000000 /* PCI base */
176 #define PCI_MSTR_MEMIO_BUS CONFIG_SYS_PCI_MSTR_MEMIO_BUS
179 #ifndef CONFIG_SYS_CPU_PCI_MEMIO_START
180 #define CPU_PCI_MEMIO_START PCI_MSTR_MEMIO_LOCAL
182 #define CPU_PCI_MEMIO_START CONFIG_SYS_CPU_PCI_MEMIO_START
185 #ifndef CONFIG_SYS_PCI_MSTR_MEMIO_SIZE
186 #define PCI_MSTR_MEMIO_SIZE 0x10000000 /* 256 MB */
188 #define PCI_MSTR_MEMIO_SIZE CONFIG_SYS_PCI_MSTR_MEMIO_SIZE
191 #ifndef CONFIG_SYS_POCMR1_MASK_ATTRIB
192 #define POCMR1_MASK_ATTRIB (POCMR_MASK_512MB | POCMR_ENABLE)
194 #define POCMR1_MASK_ATTRIB CONFIG_SYS_POCMR1_MASK_ATTRIB
198 * Master window that allows the CPU to access PCI IO space.
199 * This window will be setup with the third set of Outbound ATU registers
203 #ifndef CONFIG_SYS_PCI_MSTR_IO_LOCAL
204 #define PCI_MSTR_IO_LOCAL 0xA0000000 /* Local base */
206 #define PCI_MSTR_IO_LOCAL CONFIG_SYS_PCI_MSTR_IO_LOCAL
209 #ifndef CONFIG_SYS_PCI_MSTR_IO_BUS
210 #define PCI_MSTR_IO_BUS 0xA0000000 /* PCI base */
212 #define PCI_MSTR_IO_BUS CONFIG_SYS_PCI_MSTR_IO_BUS
215 #ifndef CONFIG_SYS_CPU_PCI_IO_START
216 #define CPU_PCI_IO_START PCI_MSTR_IO_LOCAL
218 #define CPU_PCI_IO_START CONFIG_SYS_CPU_PCI_IO_START
221 #ifndef CONFIG_SYS_PCI_MSTR_IO_SIZE
222 #define PCI_MSTR_IO_SIZE 0x10000000 /* 256MB */
224 #define PCI_MSTR_IO_SIZE CONFIG_SYS_PCI_MSTR_IO_SIZE
227 #ifndef CONFIG_SYS_POCMR2_MASK_ATTRIB
228 #define POCMR2_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PCI_IO)
230 #define POCMR2_MASK_ATTRIB CONFIG_SYS_POCMR2_MASK_ATTRIB
233 /* PCI bus configuration registers.
236 #define PCI_CLASS_BRIDGE_CTLR 0x06
239 static inline void pci_outl (u32 addr, u32 data)
241 *(volatile u32 *) addr = cpu_to_le32 (data);
244 void pci_mpc8250_init (struct pci_controller *hose)
248 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
249 pci_dev_t host_devno = PCI_BDF (0, 0, 0);
251 pci_setup_indirect (hose, CONFIG_SYS_IMMR + PCI_CFG_ADDR_REG,
252 CONFIG_SYS_IMMR + PCI_CFG_DATA_REG);
255 * Setting required to enable local bus for PCI (SIUMCR [LBPC]).
257 #ifdef CONFIG_MPC8266ADS
258 immap->im_siu_conf.sc_siumcr =
259 (immap->im_siu_conf.sc_siumcr & ~SIUMCR_LBPC11)
261 #elif defined(CONFIG_ADSTYPE) && CONFIG_ADSTYPE == CONFIG_SYS_PQ2FADS
262 /* nothing to do for this board here */
263 #elif defined CONFIG_MPC8272
264 immap->im_siu_conf.sc_siumcr = (immap->im_siu_conf.sc_siumcr &
283 #elif defined(CONFIG_TQM8272)
284 /* nothing to do for this Board here */
287 * Setting required to enable IRQ1-IRQ7 (SIUMCR [DPPC]),
288 * and local bus for PCI (SIUMCR [LBPC]).
290 immap->im_siu_conf.sc_siumcr = (immap->im_siu_conf.sc_siumcr &
299 /* Make PCI lowest priority */
300 /* Each 4 bits is a device bus request and the MS 4bits
301 is highest priority */
311 External Master 1 0b0111
312 External Master 2 0b1000
313 External Master 3 0b1001
314 The rest are reserved */
315 immap->im_siu_conf.sc_ppc_alrh = 0x61207893;
317 /* Park bus on core while modifying PCI Bus accesses */
318 immap->im_siu_conf.sc_ppc_acr = 0x6;
321 * Set up master windows that allow the CPU to access PCI space. These
322 * windows are set up using the two SIU PCIBR registers.
324 immap->im_memctl.memc_pcimsk0 = PCIMSK0_MASK;
325 immap->im_memctl.memc_pcibr0 = PCI_MSTR0_LOCAL | PCIBR_ENABLE;
327 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
328 immap->im_memctl.memc_pcimsk1 = PCIMSK1_MASK;
329 immap->im_memctl.memc_pcibr1 = PCI_MSTR1_LOCAL | PCIBR_ENABLE;
332 /* Release PCI RST (by default the PCI RST signal is held low) */
333 immap->im_pci.pci_gcr = cpu_to_le32 (PCIGCR_PCI_BUS_EN);
335 /* give it some time */
337 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
338 /* Give the PCI cards more time to initialize before query
339 This might be good for other boards also
343 for (i = 0; i < 1000; ++i)
349 * Set up master window that allows the CPU to access PCI Memory (prefetch)
350 * space. This window is set up using the first set of Outbound ATU registers.
352 immap->im_pci.pci_potar0 = cpu_to_le32 (PCI_MSTR_MEM_BUS >> 12); /* PCI base */
353 immap->im_pci.pci_pobar0 = cpu_to_le32 (PCI_MSTR_MEM_LOCAL >> 12); /* Local base */
354 immap->im_pci.pci_pocmr0 = cpu_to_le32 (POCMR0_MASK_ATTRIB); /* Size & attribute */
357 * Set up master window that allows the CPU to access PCI Memory (non-prefetch)
358 * space. This window is set up using the second set of Outbound ATU registers.
360 immap->im_pci.pci_potar1 = cpu_to_le32 (PCI_MSTR_MEMIO_BUS >> 12); /* PCI base */
361 immap->im_pci.pci_pobar1 = cpu_to_le32 (PCI_MSTR_MEMIO_LOCAL >> 12); /* Local base */
362 immap->im_pci.pci_pocmr1 = cpu_to_le32 (POCMR1_MASK_ATTRIB); /* Size & attribute */
365 * Set up master window that allows the CPU to access PCI IO space. This window
366 * is set up using the third set of Outbound ATU registers.
368 immap->im_pci.pci_potar2 = cpu_to_le32 (PCI_MSTR_IO_BUS >> 12); /* PCI base */
369 immap->im_pci.pci_pobar2 = cpu_to_le32 (PCI_MSTR_IO_LOCAL >> 12); /* Local base */
370 immap->im_pci.pci_pocmr2 = cpu_to_le32 (POCMR2_MASK_ATTRIB); /* Size & attribute */
373 * Set up slave window that allows PCI masters to access MPC826x local memory.
374 * This window is set up using the first set of Inbound ATU registers
376 immap->im_pci.pci_pitar0 = cpu_to_le32 (PCI_SLV_MEM_LOCAL >> 12); /* PCI base */
377 immap->im_pci.pci_pibar0 = cpu_to_le32 (PCI_SLV_MEM_BUS >> 12); /* Local base */
378 immap->im_pci.pci_picmr0 = cpu_to_le32 (PICMR0_MASK_ATTRIB); /* Size & attribute */
380 /* See above for description - puts PCI request as highest priority */
381 #ifdef CONFIG_MPC8272
382 immap->im_siu_conf.sc_ppc_alrh = 0x01236745;
384 immap->im_siu_conf.sc_ppc_alrh = 0x03124567;
387 /* Park the bus on the PCI */
388 immap->im_siu_conf.sc_ppc_acr = PPC_ACR_BUS_PARK_PCI;
390 /* Host mode - specify the bridge as a host-PCI bridge */
392 pci_hose_write_config_byte (hose, host_devno, PCI_CLASS_CODE,
393 PCI_CLASS_BRIDGE_CTLR);
395 /* Enable the host bridge to be a master on the PCI bus, and to act as a PCI memory target */
396 pci_hose_read_config_word (hose, host_devno, PCI_COMMAND, &tempShort);
397 pci_hose_write_config_word (hose, host_devno, PCI_COMMAND,
398 tempShort | PCI_COMMAND_MASTER |
401 /* do some bridge init, should be done on all 8260 based bridges */
402 pci_hose_write_config_byte (hose, host_devno, PCI_CACHE_LINE_SIZE,
404 pci_hose_write_config_byte (hose, host_devno, PCI_LATENCY_TIMER,
407 hose->first_busno = 0;
408 hose->last_busno = 0xff;
410 /* System memory space */
411 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272 || defined CONFIG_PM826
412 pci_set_region (hose->regions + 0,
415 gd->ram_size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
417 pci_set_region (hose->regions + 0,
418 CONFIG_SYS_SDRAM_BASE,
419 CONFIG_SYS_SDRAM_BASE,
420 0x4000000, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
423 /* PCI memory space */
424 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
425 pci_set_region (hose->regions + 1,
427 PCI_MSTR_MEMIO_LOCAL,
428 PCI_MSTR_MEMIO_SIZE, PCI_REGION_MEM);
430 pci_set_region (hose->regions + 1,
433 PCI_MSTR_MEM_SIZE, PCI_REGION_MEM);
437 pci_set_region (hose->regions + 2,
439 PCI_MSTR_IO_LOCAL, PCI_MSTR_IO_SIZE, PCI_REGION_IO);
441 hose->region_count = 3;
443 pci_register_hose (hose);
444 /* Mask off master abort machine checks */
445 immap->im_pci.pci_emr &= cpu_to_le32 (~PCI_ERROR_PCI_NO_RSP);
448 hose->last_busno = pci_hose_scan (hose);
451 /* clear the error in the error status register */
452 immap->im_pci.pci_esr = cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
454 /* unmask master abort machine checks */
455 immap->im_pci.pci_emr |= cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
458 #if defined(CONFIG_OF_LIBFDT)
459 void ft_pci_setup(void *blob, bd_t *bd)
461 do_fixup_by_prop_u32(blob, "device_type", "pci", 4,
462 "clock-frequency", gd->pci_clk, 1);
466 #endif /* CONFIG_PCI */