2 * (C) Copyright 2000-2007
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <ppc4xx_enet.h>
27 #include <asm/processor.h>
31 #if defined(CONFIG_405GP) || defined(CONFIG_405EP)
32 DECLARE_GLOBAL_DATA_PTR;
35 #ifndef CONFIG_SYS_PLL_RECONFIG
36 #define CONFIG_SYS_PLL_RECONFIG 0
39 #if defined(CONFIG_440EPX) || \
40 defined(CONFIG_460EX) || defined(CONFIG_460GT)
41 static void reset_with_rli(void)
46 * Set reload inhibit so configuration will persist across
49 mfcpr(CPR0_ICFG, reg);
50 reg |= CPR0_ICFG_RLI_MASK;
51 mtcpr(CPR0_ICFG, reg);
53 /* Reset processor if configuration changed */
54 __asm__ __volatile__ ("sync; isync");
55 mtspr(SPRN_DBCR0, 0x20000000);
59 void reconfigure_pll(u32 new_cpu_freq)
61 #if defined(CONFIG_440EPX)
64 u32 prbdv0, target_prbdv0, /* CLK_PRIMBD */
65 fwdva, target_fwdva, fwdvb, target_fwdvb, /* CLK_PLLD */
66 fbdv, target_fbdv, lfbdv, target_lfbdv,
67 perdv0, target_perdv0, /* CLK_PERD */
68 spcid0, target_spcid0; /* CLK_SPCID */
70 /* Reconfigure clocks if necessary.
71 * See PPC440EPx User's Manual, sections 8.2 and 14 */
72 if (new_cpu_freq == 667) {
81 mfcpr(CPR0_PRIMBD0, reg);
82 temp = (reg & PRBDV_MASK) >> 24;
83 prbdv0 = temp ? temp : 8;
84 if (prbdv0 != target_prbdv0) {
86 reg |= ((target_prbdv0 == 8 ? 0 : target_prbdv0) << 24);
87 mtcpr(CPR0_PRIMBD0, reg);
91 mfcpr(CPR0_PLLD, reg);
93 temp = (reg & PLLD_FWDVA_MASK) >> 16;
94 fwdva = temp ? temp : 16;
96 temp = (reg & PLLD_FWDVB_MASK) >> 8;
97 fwdvb = temp ? temp : 8;
99 temp = (reg & PLLD_FBDV_MASK) >> 24;
100 fbdv = temp ? temp : 32;
102 temp = (reg & PLLD_LFBDV_MASK);
103 lfbdv = temp ? temp : 64;
105 if (fwdva != target_fwdva || fbdv != target_fbdv || lfbdv != target_lfbdv) {
106 reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
107 PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
108 reg |= ((target_fwdva == 16 ? 0 : target_fwdva) << 16) |
109 ((target_fwdvb == 8 ? 0 : target_fwdvb) << 8) |
110 ((target_fbdv == 32 ? 0 : target_fbdv) << 24) |
111 (target_lfbdv == 64 ? 0 : target_lfbdv);
112 mtcpr(CPR0_PLLD, reg);
116 mfcpr(CPR0_PERD, reg);
117 perdv0 = (reg & CPR0_PERD_PERDV0_MASK) >> 24;
118 if (perdv0 != target_perdv0) {
119 reg &= ~CPR0_PERD_PERDV0_MASK;
120 reg |= (target_perdv0 << 24);
121 mtcpr(CPR0_PERD, reg);
125 mfcpr(CPR0_SPCID, reg);
126 temp = (reg & CPR0_SPCID_SPCIDV0_MASK) >> 24;
127 spcid0 = temp ? temp : 4;
128 if (spcid0 != target_spcid0) {
129 reg &= ~CPR0_SPCID_SPCIDV0_MASK;
130 reg |= ((target_spcid0 == 4 ? 0 : target_spcid0) << 24);
131 mtcpr(CPR0_SPCID, reg);
136 /* Get current value of FWDVA.*/
137 mfcpr(CPR0_PLLD, reg);
138 temp = (reg & PLLD_FWDVA_MASK) >> 16;
141 * Check to see if FWDVA has been set to value of 1. if it has we must
146 * Load register that contains current boot strapping option.
148 mfcpr(CPR0_ICFG, reg);
150 * Strapping option bits (ICS) are already in correct position,
151 * only masking needed.
153 reg &= CPR0_ICFG_ICS_MASK;
155 if ((reg == BOOT_STRAP_OPTION_A) || (reg == BOOT_STRAP_OPTION_B) ||
156 (reg == BOOT_STRAP_OPTION_D) || (reg == BOOT_STRAP_OPTION_E)) {
157 mfcpr(CPR0_PLLD, reg);
159 /* Get current value of fbdv. */
160 temp = (reg & PLLD_FBDV_MASK) >> 24;
161 fbdv = temp ? temp : 32;
163 /* Get current value of lfbdv. */
164 temp = (reg & PLLD_LFBDV_MASK);
165 lfbdv = temp ? temp : 64;
168 * Get current value of FWDVA. Assign current FWDVA to
171 mfcpr(CPR0_PLLD, reg);
172 target_fwdvb = (reg & PLLD_FWDVA_MASK) >> 16;
173 fwdvb = target_fwdvb ? target_fwdvb : 8;
176 * Get current value of FWDVB. Assign current FWDVB to
179 target_fwdva = (reg & PLLD_FWDVB_MASK) >> 8;
180 fwdva = target_fwdva ? target_fwdva : 16;
183 * Update CPR0_PLLD with switched FWDVA and FWDVB.
185 reg &= ~(PLLD_FWDVA_MASK | PLLD_FWDVB_MASK |
186 PLLD_FBDV_MASK | PLLD_LFBDV_MASK);
187 reg |= ((fwdva == 16 ? 0 : fwdva) << 16) |
188 ((fwdvb == 8 ? 0 : fwdvb) << 8) |
189 ((fbdv == 32 ? 0 : fbdv) << 24) |
190 (lfbdv == 64 ? 0 : lfbdv);
191 mtcpr(CPR0_PLLD, reg);
193 /* Acknowledge that a reset is required. */
198 /* Now reset the CPU if needed */
203 #if defined(CONFIG_460EX) || defined(CONFIG_460GT)
207 * See "9.2.1.1 Booting with Option E" in the 460EX/GT
210 mfcpr(CPR0_PLLC, reg);
211 if ((reg & (CPR0_PLLC_RST | CPR0_PLLC_ENG)) == CPR0_PLLC_RST) {
215 reg = (reg & ~CPR0_PLLC_RST) | CPR0_PLLC_ENG;
216 mtcpr(CPR0_PLLC, reg);
218 /* Now reset the CPU */
225 * Breath some life into the CPU...
227 * Reconfigure PLL if necessary,
228 * set up the memory map,
229 * initialize a bunch of registers
234 #if defined(CONFIG_WATCHDOG) || defined(CONFIG_440GX) || defined(CONFIG_460EX)
238 reconfigure_pll(CONFIG_SYS_PLL_RECONFIG);
240 #if (defined(CONFIG_405EP) || defined (CONFIG_405EX)) && !defined(CONFIG_SYS_4xx_GPIO_TABLE)
242 * GPIO0 setup (select GPIO or alternate function)
244 #if defined(CONFIG_SYS_GPIO0_OR)
245 out32(GPIO0_OR, CONFIG_SYS_GPIO0_OR); /* set initial state of output pins */
247 #if defined(CONFIG_SYS_GPIO0_ODR)
248 out32(GPIO0_ODR, CONFIG_SYS_GPIO0_ODR); /* open-drain select */
250 out32(GPIO0_OSRH, CONFIG_SYS_GPIO0_OSRH); /* output select */
251 out32(GPIO0_OSRL, CONFIG_SYS_GPIO0_OSRL);
252 out32(GPIO0_ISR1H, CONFIG_SYS_GPIO0_ISR1H); /* input select */
253 out32(GPIO0_ISR1L, CONFIG_SYS_GPIO0_ISR1L);
254 out32(GPIO0_TSRH, CONFIG_SYS_GPIO0_TSRH); /* three-state select */
255 out32(GPIO0_TSRL, CONFIG_SYS_GPIO0_TSRL);
256 #if defined(CONFIG_SYS_GPIO0_ISR2H)
257 out32(GPIO0_ISR2H, CONFIG_SYS_GPIO0_ISR2H);
258 out32(GPIO0_ISR2L, CONFIG_SYS_GPIO0_ISR2L);
260 #if defined (CONFIG_SYS_GPIO0_TCR)
261 out32(GPIO0_TCR, CONFIG_SYS_GPIO0_TCR); /* enable output driver for outputs */
263 #endif /* CONFIG_405EP ... && !CONFIG_SYS_4xx_GPIO_TABLE */
265 #if defined (CONFIG_405EP)
267 * Set EMAC noise filter bits
269 mtdcr(CPC0_EPCTL, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
270 #endif /* CONFIG_405EP */
272 #if defined(CONFIG_SYS_4xx_GPIO_TABLE)
273 gpio_set_chip_configuration();
274 #endif /* CONFIG_SYS_4xx_GPIO_TABLE */
277 * External Bus Controller (EBC) Setup
279 #if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
280 #if (defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
281 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
282 defined(CONFIG_405EX) || defined(CONFIG_405))
284 * Move the next instructions into icache, since these modify the flash
285 * we are running from!
287 asm volatile(" bl 0f" ::: "lr");
288 asm volatile("0: mflr 3" ::: "r3");
289 asm volatile(" addi 4, 0, 14" ::: "r4");
290 asm volatile(" mtctr 4" ::: "ctr");
291 asm volatile("1: icbt 0, 3");
292 asm volatile(" addi 3, 3, 32" ::: "r3");
293 asm volatile(" bdnz 1b" ::: "ctr", "cr0");
294 asm volatile(" addis 3, 0, 0x0" ::: "r3");
295 asm volatile(" ori 3, 3, 0xA000" ::: "r3");
296 asm volatile(" mtctr 3" ::: "ctr");
297 asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
300 mtebc(PB0AP, CONFIG_SYS_EBC_PB0AP);
301 mtebc(PB0CR, CONFIG_SYS_EBC_PB0CR);
304 #if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 1))
305 mtebc(PB1AP, CONFIG_SYS_EBC_PB1AP);
306 mtebc(PB1CR, CONFIG_SYS_EBC_PB1CR);
309 #if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 2))
310 mtebc(PB2AP, CONFIG_SYS_EBC_PB2AP);
311 mtebc(PB2CR, CONFIG_SYS_EBC_PB2CR);
314 #if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 3))
315 mtebc(PB3AP, CONFIG_SYS_EBC_PB3AP);
316 mtebc(PB3CR, CONFIG_SYS_EBC_PB3CR);
319 #if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 4))
320 mtebc(PB4AP, CONFIG_SYS_EBC_PB4AP);
321 mtebc(PB4CR, CONFIG_SYS_EBC_PB4CR);
324 #if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 5))
325 mtebc(PB5AP, CONFIG_SYS_EBC_PB5AP);
326 mtebc(PB5CR, CONFIG_SYS_EBC_PB5CR);
329 #if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 6))
330 mtebc(PB6AP, CONFIG_SYS_EBC_PB6AP);
331 mtebc(PB6CR, CONFIG_SYS_EBC_PB6CR);
334 #if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR) && !(CONFIG_SYS_INIT_DCACHE_CS == 7))
335 mtebc(PB7AP, CONFIG_SYS_EBC_PB7AP);
336 mtebc(PB7CR, CONFIG_SYS_EBC_PB7CR);
339 #if defined (CONFIG_SYS_EBC_CFG)
340 mtebc(EBC0_CFG, CONFIG_SYS_EBC_CFG);
343 #if defined(CONFIG_WATCHDOG)
345 #if defined(CONFIG_440EP) || defined(CONFIG_440GR)
346 val |= 0xb8000000; /* generate system reset after 1.34 seconds */
347 #elif defined(CONFIG_440EPX)
348 val |= 0xb0000000; /* generate system reset after 1.34 seconds */
350 val |= 0xf0000000; /* generate system reset after 2.684 seconds */
352 #if defined(CONFIG_SYS_4xx_RESET_TYPE)
353 val &= ~0x30000000; /* clear WRC bits */
354 val |= CONFIG_SYS_4xx_RESET_TYPE << 28; /* set board specific WRC type */
359 val |= 0x80000000; /* enable watchdog timer */
362 reset_4xx_watchdog();
363 #endif /* CONFIG_WATCHDOG */
365 #if defined(CONFIG_440GX)
366 /* Take the GX out of compatibility mode
367 * Travis Sawyer, 9 Mar 2004
368 * NOTE: 440gx user manual inconsistency here
369 * Compatibility mode and Ethernet Clock select are not
370 * correct in the manual
372 mfsdr(SDR0_MFR, val);
375 #endif /* CONFIG_440GX */
377 #if defined(CONFIG_460EX)
379 * Set SDR0_AHB_CFG[A2P_INCR4] (bit 24) and
380 * clear SDR0_AHB_CFG[A2P_PROT2] (bit 25) for a new 460EX errata
381 * regarding concurrent use of AHB USB OTG, USB 2.0 host and SATA
383 mfsdr(SDR0_AHB_CFG, val);
386 mtsdr(SDR0_AHB_CFG, val);
387 mfsdr(SDR0_USB2HOST_CFG, val);
390 mtsdr(SDR0_USB2HOST_CFG, val);
391 #endif /* CONFIG_460EX */
393 #if defined(CONFIG_405EX) || \
394 defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
395 defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
396 defined(CONFIG_460SX)
398 * Set PLB4 arbiter (Segment 0 and 1) to 4 deep pipeline read
400 mtdcr(PLB0_ACR, (mfdcr(PLB0_ACR) & ~PLB0_ACR_RDP_MASK) |
402 mtdcr(PLB1_ACR, (mfdcr(PLB1_ACR) & ~PLB1_ACR_RDP_MASK) |
404 #endif /* CONFIG_440SP/SPE || CONFIG_460EX/GT || CONFIG_405EX */
408 * initialize higher level parts of CPU like time base and timers
410 int cpu_init_r (void)
412 #if defined(CONFIG_405GP)
413 uint pvr = get_pvr();
416 * Set edge conditioning circuitry on PPC405GPr
417 * for compatibility to existing PPC405GP designs.
419 if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
420 mtdcr(CPC0_ECR, 0x60606000);
422 #endif /* defined(CONFIG_405GP) */
427 #if defined(CONFIG_PCI) && \
428 (defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
429 defined(CONFIG_440GR) || defined(CONFIG_440GRX))
431 * 440EP(x)/GR(x) PCI async/sync clocking restriction:
433 * In asynchronous PCI mode, the synchronous PCI clock must meet
434 * certain requirements. The following equation describes the
435 * relationship that must be maintained between the asynchronous PCI
436 * clock and synchronous PCI clock. Select an appropriate PCI:PLB
437 * ratio to maintain the relationship:
439 * AsyncPCIClk - 1MHz <= SyncPCIclock <= (2 * AsyncPCIClk) - 1MHz
441 static int ppc4xx_pci_sync_clock_ok(u32 sync, u32 async)
443 if (((async - 1000000) > sync) || (sync > ((2 * async) - 1000000)))
449 int ppc4xx_pci_sync_clock_config(u32 async)
456 CPR0_SPCID_SPCIDV0_DIV1, CPR0_SPCID_SPCIDV0_DIV2,
457 CPR0_SPCID_SPCIDV0_DIV3, CPR0_SPCID_SPCIDV0_DIV4 };
459 get_sys_info(&sys_info);
460 sync = sys_info.freqPCI;
463 * First check if the equation above is met
465 if (!ppc4xx_pci_sync_clock_ok(sync, async)) {
467 * Reconfigure PCI sync clock to meet the equation.
468 * Start with highest possible PCI sync frequency
471 for (div = 1; div <= 4; div++) {
472 sync = sys_info.freqPLB / div;
473 if (ppc4xx_pci_sync_clock_ok(sync, async))
478 mtcpr(CPR0_SPCID, spcid_val[div]);
480 mfcpr(CPR0_ICFG, reg);
481 reg |= CPR0_ICFG_RLI_MASK;
482 mtcpr(CPR0_ICFG, reg);
485 mtspr(SPRN_DBCR0, 0x20000000);
487 /* Impossible to configure the PCI sync clock */