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>
37 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272 || defined CONFIG_PM826
38 DECLARE_GLOBAL_DATA_PTR;
42 * Local->PCI map (from CPU) controlled by
43 * MPC826x master window
45 * 0x80000000 - 0xBFFFFFFF CPU2PCI space PCIBR0
46 * 0xF4000000 - 0xF7FFFFFF CPU2PCI space PCIBR1
48 * 0x80000000 - 0x9FFFFFFF 0x80000000 - 0x9FFFFFFF (Outbound ATU #1)
49 * PCI Mem with prefetch
51 * 0xA0000000 - 0xBFFFFFFF 0xA0000000 - 0xBFFFFFFF (Outbound ATU #2)
52 * PCI Mem w/o prefetch
54 * 0xF4000000 - 0xF7FFFFFF 0x00000000 - 0x03FFFFFF (Outbound ATU #3)
57 * PCI->Local map (from PCI)
58 * MPC826x slave window controlled by
60 * 0x00000000 - 0x1FFFFFFF 0x00000000 - 0x1FFFFFFF (Inbound ATU #1)
61 * MPC826x local memory
65 * Slave window that allows PCI masters to access MPC826x local memory.
66 * This window is set up using the first set of Inbound ATU registers
69 #ifndef CFG_PCI_SLV_MEM_LOCAL
70 #define PCI_SLV_MEM_LOCAL CFG_SDRAM_BASE /* Local base */
72 #define PCI_SLV_MEM_LOCAL CFG_PCI_SLV_MEM_LOCAL
75 #ifndef CFG_PCI_SLV_MEM_BUS
76 #define PCI_SLV_MEM_BUS 0x00000000 /* PCI base */
78 #define PCI_SLV_MEM_BUS CFG_PCI_SLV_MEM_BUS
81 #ifndef CFG_PICMR0_MASK_ATTRIB
82 #define PICMR0_MASK_ATTRIB (PICMR_MASK_512MB | PICMR_ENABLE | \
85 #define PICMR0_MASK_ATTRIB CFG_PICMR0_MASK_ATTRIB
89 * These are the windows that allow the CPU to access PCI address space.
90 * All three PCI master windows, which allow the CPU to access PCI
91 * prefetch, non prefetch, and IO space (see below), must all fit within
96 #ifndef CFG_PCI_MSTR0_LOCAL
97 #define PCI_MSTR0_LOCAL 0x80000000 /* Local base */
99 #define PCI_MSTR0_LOCAL CFG_PCI_MSTR0_LOCAL
102 #ifndef CFG_PCIMSK0_MASK
103 #define PCIMSK0_MASK PCIMSK_1GB /* Size of window */
105 #define PCIMSK0_MASK CFG_PCIMSK0_MASK
109 #ifndef CFG_PCI_MSTR1_LOCAL
110 #define PCI_MSTR1_LOCAL 0xF4000000 /* Local base */
112 #define PCI_MSTR1_LOCAL CFG_PCI_MSTR1_LOCAL
115 #ifndef CFG_PCIMSK1_MASK
116 #define PCIMSK1_MASK PCIMSK_64MB /* Size of window */
118 #define PCIMSK1_MASK CFG_PCIMSK1_MASK
122 * Master window that allows the CPU to access PCI Memory (prefetch).
123 * This window will be setup with the first set of Outbound ATU registers
127 #ifndef CFG_PCI_MSTR_MEM_LOCAL
128 #define PCI_MSTR_MEM_LOCAL 0x80000000 /* Local base */
130 #define PCI_MSTR_MEM_LOCAL CFG_PCI_MSTR_MEM_LOCAL
133 #ifndef CFG_PCI_MSTR_MEM_BUS
134 #define PCI_MSTR_MEM_BUS 0x80000000 /* PCI base */
136 #define PCI_MSTR_MEM_BUS CFG_PCI_MSTR_MEM_BUS
139 #ifndef CFG_CPU_PCI_MEM_START
140 #define CPU_PCI_MEM_START PCI_MSTR_MEM_LOCAL
142 #define CPU_PCI_MEM_START CFG_CPU_PCI_MEM_START
145 #ifndef CFG_PCI_MSTR_MEM_SIZE
146 #define PCI_MSTR_MEM_SIZE 0x10000000 /* 256MB */
148 #define PCI_MSTR_MEM_SIZE CFG_PCI_MSTR_MEM_SIZE
151 #ifndef CFG_POCMR0_MASK_ATTRIB
152 #define POCMR0_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PREFETCH_EN)
154 #define POCMR0_MASK_ATTRIB CFG_POCMR0_MASK_ATTRIB
158 * Master window that allows the CPU to access PCI Memory (non-prefetch).
159 * This window will be setup with the second set of Outbound ATU registers
163 #ifndef CFG_PCI_MSTR_MEMIO_LOCAL
164 #define PCI_MSTR_MEMIO_LOCAL 0x90000000 /* Local base */
166 #define PCI_MSTR_MEMIO_LOCAL CFG_PCI_MSTR_MEMIO_LOCAL
169 #ifndef CFG_PCI_MSTR_MEMIO_BUS
170 #define PCI_MSTR_MEMIO_BUS 0x90000000 /* PCI base */
172 #define PCI_MSTR_MEMIO_BUS CFG_PCI_MSTR_MEMIO_BUS
175 #ifndef CFG_CPU_PCI_MEMIO_START
176 #define CPU_PCI_MEMIO_START PCI_MSTR_MEMIO_LOCAL
178 #define CPU_PCI_MEMIO_START CFG_CPU_PCI_MEMIO_START
181 #ifndef CFG_PCI_MSTR_MEMIO_SIZE
182 #define PCI_MSTR_MEMIO_SIZE 0x10000000 /* 256 MB */
184 #define PCI_MSTR_MEMIO_SIZE CFG_PCI_MSTR_MEMIO_SIZE
187 #ifndef CFG_POCMR1_MASK_ATTRIB
188 #define POCMR1_MASK_ATTRIB (POCMR_MASK_512MB | POCMR_ENABLE)
190 #define POCMR1_MASK_ATTRIB CFG_POCMR1_MASK_ATTRIB
194 * Master window that allows the CPU to access PCI IO space.
195 * This window will be setup with the third set of Outbound ATU registers
199 #ifndef CFG_PCI_MSTR_IO_LOCAL
200 #define PCI_MSTR_IO_LOCAL 0xA0000000 /* Local base */
202 #define PCI_MSTR_IO_LOCAL CFG_PCI_MSTR_IO_LOCAL
205 #ifndef CFG_PCI_MSTR_IO_BUS
206 #define PCI_MSTR_IO_BUS 0xA0000000 /* PCI base */
208 #define PCI_MSTR_IO_BUS CFG_PCI_MSTR_IO_BUS
211 #ifndef CFG_CPU_PCI_IO_START
212 #define CPU_PCI_IO_START PCI_MSTR_IO_LOCAL
214 #define CPU_PCI_IO_START CFG_CPU_PCI_IO_START
217 #ifndef CFG_PCI_MSTR_IO_SIZE
218 #define PCI_MSTR_IO_SIZE 0x10000000 /* 256MB */
220 #define PCI_MSTR_IO_SIZE CFG_PCI_MSTR_IO_SIZE
223 #ifndef CFG_POCMR2_MASK_ATTRIB
224 #define POCMR2_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PCI_IO)
226 #define POCMR2_MASK_ATTRIB CFG_POCMR2_MASK_ATTRIB
229 /* PCI bus configuration registers.
232 #define PCI_CLASS_BRIDGE_CTLR 0x06
235 static inline void pci_outl (u32 addr, u32 data)
237 *(volatile u32 *) addr = cpu_to_le32 (data);
240 void pci_mpc8250_init (struct pci_controller *hose)
244 volatile immap_t *immap = (immap_t *) CFG_IMMR;
245 pci_dev_t host_devno = PCI_BDF (0, 0, 0);
247 pci_setup_indirect (hose, CFG_IMMR + PCI_CFG_ADDR_REG,
248 CFG_IMMR + PCI_CFG_DATA_REG);
251 * Setting required to enable local bus for PCI (SIUMCR [LBPC]).
253 #ifdef CONFIG_MPC8266ADS
254 immap->im_siu_conf.sc_siumcr =
255 (immap->im_siu_conf.sc_siumcr & ~SIUMCR_LBPC11)
257 #elif defined CONFIG_MPC8272
258 immap->im_siu_conf.sc_siumcr = (immap->im_siu_conf.sc_siumcr &
280 * Setting required to enable IRQ1-IRQ7 (SIUMCR [DPPC]),
281 * and local bus for PCI (SIUMCR [LBPC]).
283 immap->im_siu_conf.sc_siumcr = (immap->im_siu_conf.sc_siumcr &
292 /* Make PCI lowest priority */
293 /* Each 4 bits is a device bus request and the MS 4bits
294 is highest priority */
304 External Master 1 0b0111
305 External Master 2 0b1000
306 External Master 3 0b1001
307 The rest are reserved */
308 immap->im_siu_conf.sc_ppc_alrh = 0x61207893;
310 /* Park bus on core while modifying PCI Bus accesses */
311 immap->im_siu_conf.sc_ppc_acr = 0x6;
314 * Set up master windows that allow the CPU to access PCI space. These
315 * windows are set up using the two SIU PCIBR registers.
317 immap->im_memctl.memc_pcimsk0 = PCIMSK0_MASK;
318 immap->im_memctl.memc_pcibr0 = PCI_MSTR0_LOCAL | PCIBR_ENABLE;
320 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
321 immap->im_memctl.memc_pcimsk1 = PCIMSK1_MASK;
322 immap->im_memctl.memc_pcibr1 = PCI_MSTR1_LOCAL | PCIBR_ENABLE;
325 /* Release PCI RST (by default the PCI RST signal is held low) */
326 immap->im_pci.pci_gcr = cpu_to_le32 (PCIGCR_PCI_BUS_EN);
328 /* give it some time */
330 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
331 /* Give the PCI cards more time to initialize before query
332 This might be good for other boards also
336 for (i = 0; i < 1000; ++i)
342 * Set up master window that allows the CPU to access PCI Memory (prefetch)
343 * space. This window is set up using the first set of Outbound ATU registers.
345 immap->im_pci.pci_potar0 = cpu_to_le32 (PCI_MSTR_MEM_BUS >> 12); /* PCI base */
346 immap->im_pci.pci_pobar0 = cpu_to_le32 (PCI_MSTR_MEM_LOCAL >> 12); /* Local base */
347 immap->im_pci.pci_pocmr0 = cpu_to_le32 (POCMR0_MASK_ATTRIB); /* Size & attribute */
350 * Set up master window that allows the CPU to access PCI Memory (non-prefetch)
351 * space. This window is set up using the second set of Outbound ATU registers.
353 immap->im_pci.pci_potar1 = cpu_to_le32 (PCI_MSTR_MEMIO_BUS >> 12); /* PCI base */
354 immap->im_pci.pci_pobar1 = cpu_to_le32 (PCI_MSTR_MEMIO_LOCAL >> 12); /* Local base */
355 immap->im_pci.pci_pocmr1 = cpu_to_le32 (POCMR1_MASK_ATTRIB); /* Size & attribute */
358 * Set up master window that allows the CPU to access PCI IO space. This window
359 * is set up using the third set of Outbound ATU registers.
361 immap->im_pci.pci_potar2 = cpu_to_le32 (PCI_MSTR_IO_BUS >> 12); /* PCI base */
362 immap->im_pci.pci_pobar2 = cpu_to_le32 (PCI_MSTR_IO_LOCAL >> 12); /* Local base */
363 immap->im_pci.pci_pocmr2 = cpu_to_le32 (POCMR2_MASK_ATTRIB); /* Size & attribute */
366 * Set up slave window that allows PCI masters to access MPC826x local memory.
367 * This window is set up using the first set of Inbound ATU registers
369 immap->im_pci.pci_pitar0 = cpu_to_le32 (PCI_SLV_MEM_LOCAL >> 12); /* PCI base */
370 immap->im_pci.pci_pibar0 = cpu_to_le32 (PCI_SLV_MEM_BUS >> 12); /* Local base */
371 immap->im_pci.pci_picmr0 = cpu_to_le32 (PICMR0_MASK_ATTRIB); /* Size & attribute */
373 /* See above for description - puts PCI request as highest priority */
374 #ifdef CONFIG_MPC8272
375 immap->im_siu_conf.sc_ppc_alrh = 0x01236745;
377 immap->im_siu_conf.sc_ppc_alrh = 0x03124567;
380 /* Park the bus on the PCI */
381 immap->im_siu_conf.sc_ppc_acr = PPC_ACR_BUS_PARK_PCI;
383 /* Host mode - specify the bridge as a host-PCI bridge */
385 pci_hose_write_config_byte (hose, host_devno, PCI_CLASS_CODE,
386 PCI_CLASS_BRIDGE_CTLR);
388 /* Enable the host bridge to be a master on the PCI bus, and to act as a PCI memory target */
389 pci_hose_read_config_word (hose, host_devno, PCI_COMMAND, &tempShort);
390 pci_hose_write_config_word (hose, host_devno, PCI_COMMAND,
391 tempShort | PCI_COMMAND_MASTER |
394 /* do some bridge init, should be done on all 8260 based bridges */
395 pci_hose_write_config_byte (hose, host_devno, PCI_CACHE_LINE_SIZE,
397 pci_hose_write_config_byte (hose, host_devno, PCI_LATENCY_TIMER,
400 hose->first_busno = 0;
401 hose->last_busno = 0xff;
403 /* System memory space */
404 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272 || defined CONFIG_PM826
405 pci_set_region (hose->regions + 0,
408 gd->ram_size, PCI_REGION_MEM | PCI_REGION_MEMORY);
410 pci_set_region (hose->regions + 0,
413 0x4000000, PCI_REGION_MEM | PCI_REGION_MEMORY);
416 /* PCI memory space */
417 #if defined CONFIG_MPC8266ADS || defined CONFIG_MPC8272
418 pci_set_region (hose->regions + 1,
420 PCI_MSTR_MEMIO_LOCAL,
421 PCI_MSTR_MEMIO_SIZE, PCI_REGION_MEM);
423 pci_set_region (hose->regions + 1,
426 PCI_MSTR_MEM_SIZE, PCI_REGION_MEM);
430 pci_set_region (hose->regions + 2,
432 PCI_MSTR_IO_LOCAL, PCI_MSTR_IO_SIZE, PCI_REGION_IO);
434 hose->region_count = 3;
436 pci_register_hose (hose);
437 /* Mask off master abort machine checks */
438 immap->im_pci.pci_emr &= cpu_to_le32 (~PCI_ERROR_PCI_NO_RSP);
441 hose->last_busno = pci_hose_scan (hose);
444 /* clear the error in the error status register */
445 immap->im_pci.pci_esr = cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
447 /* unmask master abort machine checks */
448 immap->im_pci.pci_emr |= cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
451 #endif /* CONFIG_PCI */