2 * Copyright 2007 David Gibson, IBM Corporation.
4 * Based on earlier code:
5 * Matt Porter <mporter@kernel.crashing.org>
6 * Copyright 2002-2005 MontaVista Software Inc.
8 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
9 * Copyright (c) 2003, 2004 Zultys Technologies
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
24 /* Read the 4xx SDRAM controller to get size of system memory. */
25 void ibm4xx_sdram_fixup_memsize(void)
28 unsigned long memsize, bank_config;
31 for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
32 bank_config = SDRAM0_READ(sdram_bxcr[i]);
33 if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
34 memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
37 dt_fixup_memory(0, memsize);
40 /* Read the 440SPe MQ controller to get size of system memory. */
41 #define DCRN_MQ0_B0BAS 0x40
42 #define DCRN_MQ0_B1BAS 0x41
43 #define DCRN_MQ0_B2BAS 0x42
44 #define DCRN_MQ0_B3BAS 0x43
46 static u64 ibm440spe_decode_bas(u32 bas)
48 u64 base = ((u64)(bas & 0xFFE00000u)) << 2;
50 /* open coded because I'm paranoid about invalid values */
51 switch ((bas >> 4) & 0xFFF) {
55 return base + 0x000800000ull;
57 return base + 0x001000000ull;
59 return base + 0x002000000ull;
61 return base + 0x004000000ull;
63 return base + 0x008000000ull;
65 return base + 0x010000000ull;
67 return base + 0x020000000ull;
69 return base + 0x040000000ull;
71 return base + 0x080000000ull;
73 return base + 0x100000000ull;
75 printf("Memory BAS value 0x%08x unsupported !\n", bas);
79 void ibm440spe_fixup_memsize(void)
81 u64 banktop, memsize = 0;
83 /* Ultimately, we should directly construct the memory node
84 * so we are able to handle holes in the memory address space
86 banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B0BAS));
87 if (banktop > memsize)
89 banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B1BAS));
90 if (banktop > memsize)
92 banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B2BAS));
93 if (banktop > memsize)
95 banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B3BAS));
96 if (banktop > memsize)
99 dt_fixup_memory(0, memsize);
103 /* 4xx DDR1/2 Denali memory controller support */
113 #define DDR_START 0x1
114 #define DDR_START_SHIFT 0
115 #define DDR_MAX_CS_REG 0x3
116 #define DDR_MAX_CS_REG_SHIFT 24
117 #define DDR_MAX_COL_REG 0xf
118 #define DDR_MAX_COL_REG_SHIFT 16
119 #define DDR_MAX_ROW_REG 0xf
120 #define DDR_MAX_ROW_REG_SHIFT 8
122 #define DDR_DDR2_MODE 0x1
123 #define DDR_DDR2_MODE_SHIFT 0
125 #define DDR_CS_MAP 0x3
126 #define DDR_CS_MAP_SHIFT 8
128 #define DDR_REDUC 0x1
129 #define DDR_REDUC_SHIFT 16
132 #define DDR_APIN_SHIFT 24
134 #define DDR_COL_SZ 0x7
135 #define DDR_COL_SZ_SHIFT 8
136 #define DDR_BANK8 0x1
137 #define DDR_BANK8_SHIFT 0
139 #define DDR_GET_VAL(val, mask, shift) (((val) >> (shift)) & (mask))
141 void ibm4xx_denali_fixup_memsize(void)
143 u32 val, max_cs, max_col, max_row;
144 u32 cs, col, row, bank, dpath;
145 unsigned long memsize;
147 val = SDRAM0_READ(DDR0_02);
148 if (!DDR_GET_VAL(val, DDR_START, DDR_START_SHIFT))
149 fatal("DDR controller is not initialized\n");
151 /* get maximum cs col and row values */
152 max_cs = DDR_GET_VAL(val, DDR_MAX_CS_REG, DDR_MAX_CS_REG_SHIFT);
153 max_col = DDR_GET_VAL(val, DDR_MAX_COL_REG, DDR_MAX_COL_REG_SHIFT);
154 max_row = DDR_GET_VAL(val, DDR_MAX_ROW_REG, DDR_MAX_ROW_REG_SHIFT);
157 val = SDRAM0_READ(DDR0_10);
159 val = DDR_GET_VAL(val, DDR_CS_MAP, DDR_CS_MAP_SHIFT);
168 fatal("No memory installed\n");
170 fatal("DDR wrong CS configuration\n");
172 /* get data path bytes */
173 val = SDRAM0_READ(DDR0_14);
175 if (DDR_GET_VAL(val, DDR_REDUC, DDR_REDUC_SHIFT))
176 dpath = 8; /* 64 bits */
178 dpath = 4; /* 32 bits */
180 /* get address pins (rows) */
181 val = SDRAM0_READ(DDR0_42);
183 row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT);
185 fatal("DDR wrong APIN configuration\n");
188 /* get collomn size and banks */
189 val = SDRAM0_READ(DDR0_43);
191 col = DDR_GET_VAL(val, DDR_COL_SZ, DDR_COL_SZ_SHIFT);
193 fatal("DDR wrong COL configuration\n");
196 if (DDR_GET_VAL(val, DDR_BANK8, DDR_BANK8_SHIFT))
197 bank = 8; /* 8 banks */
199 bank = 4; /* 4 banks */
201 memsize = cs * (1 << (col+row)) * bank * dpath;
202 dt_fixup_memory(0, memsize);
205 #define SPRN_DBCR0_40X 0x3F2
206 #define SPRN_DBCR0_44X 0x134
207 #define DBCR0_RST_SYSTEM 0x30000000
209 void ibm44x_dbcr_reset(void)
217 : "=&r"(tmp) : "i"(SPRN_DBCR0_44X), "i"(DBCR0_RST_SYSTEM)
222 void ibm40x_dbcr_reset(void)
230 : "=&r"(tmp) : "i"(SPRN_DBCR0_40X), "i"(DBCR0_RST_SYSTEM)
234 #define EMAC_RESET 0x20000000
235 void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1)
237 /* Quiesce the MAL and EMAC(s) since PIBS/OpenBIOS don't
245 mtdcr(DCRN_MAL0_CFG, MAL_RESET);
246 while (mfdcr(DCRN_MAL0_CFG) & MAL_RESET) {};
249 /* Read 4xx EBC bus bridge registers to get mappings of the peripheral
250 * banks into the OPB address space */
251 void ibm4xx_fixup_ebc_ranges(const char *ebc)
255 u32 ranges[EBC_NUM_BANKS*4];
259 for (i = 0; i < EBC_NUM_BANKS; i++) {
260 mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i));
261 bxcr = mfdcr(DCRN_EBC0_CFGDATA);
263 if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) {
266 *p++ = bxcr & EBC_BXCR_BAS;
267 *p++ = EBC_BXCR_BANK_SIZE(bxcr);
271 devp = finddevice(ebc);
273 fatal("Couldn't locate EBC node %s\n\r", ebc);
275 setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));
278 #define SPRN_CCR1 0x378
279 void ibm440ep_fixup_clocks(unsigned int sysclk, unsigned int ser_clk)
281 u32 cpu, plb, opb, ebc, tb, uart0, m, vco;
283 u32 fwdva, fwdvb, fbdv, lfbdv, opbdv0, perdv0, spcid0, prbdv0, tmp;
285 mtdcr(DCRN_CPR0_ADDR, CPR0_PLLD0);
286 reg = mfdcr(DCRN_CPR0_DATA);
287 tmp = (reg & 0x000F0000) >> 16;
288 fwdva = tmp ? tmp : 16;
289 tmp = (reg & 0x00000700) >> 8;
290 fwdvb = tmp ? tmp : 8;
291 tmp = (reg & 0x1F000000) >> 24;
292 fbdv = tmp ? tmp : 32;
293 lfbdv = (reg & 0x0000007F);
295 mtdcr(DCRN_CPR0_ADDR, CPR0_OPBD0);
296 reg = mfdcr(DCRN_CPR0_DATA);
297 tmp = (reg & 0x03000000) >> 24;
298 opbdv0 = tmp ? tmp : 4;
300 mtdcr(DCRN_CPR0_ADDR, CPR0_PERD0);
301 reg = mfdcr(DCRN_CPR0_DATA);
302 tmp = (reg & 0x07000000) >> 24;
303 perdv0 = tmp ? tmp : 8;
305 mtdcr(DCRN_CPR0_ADDR, CPR0_PRIMBD0);
306 reg = mfdcr(DCRN_CPR0_DATA);
307 tmp = (reg & 0x07000000) >> 24;
308 prbdv0 = tmp ? tmp : 8;
310 mtdcr(DCRN_CPR0_ADDR, CPR0_SCPID);
311 reg = mfdcr(DCRN_CPR0_DATA);
312 tmp = (reg & 0x03000000) >> 24;
313 spcid0 = tmp ? tmp : 4;
316 mtdcr(DCRN_CPR0_ADDR, CPR0_PLLC0);
317 reg = mfdcr(DCRN_CPR0_DATA);
318 tmp = (reg & 0x03000000) >> 24;
319 if (tmp == 0) { /* PLL output */
320 tmp = (reg & 0x20000000) >> 29;
321 if (!tmp) /* PLLOUTA */
322 m = fbdv * lfbdv * fwdva;
324 m = fbdv * lfbdv * fwdvb;
326 else if (tmp == 1) /* CPU output */
329 m = perdv0 * opbdv0 * fwdvb;
331 vco = (m * sysclk) + (m >> 1);
333 plb = vco / fwdvb / prbdv0;
340 /* Figure out timebase. Either CPU or default TmrClk */
344 "=&r"(reg) : "i"(SPRN_CCR1));
346 tb = 25000000; /* TmrClk is 25MHz */
350 dt_fixup_cpu_clocks(cpu, tb, 0);
351 dt_fixup_clock("/plb", plb);
352 dt_fixup_clock("/plb/opb", opb);
353 dt_fixup_clock("/plb/opb/ebc", ebc);
354 dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
355 dt_fixup_clock("/plb/opb/serial@ef600400", uart0);
356 dt_fixup_clock("/plb/opb/serial@ef600500", uart0);
357 dt_fixup_clock("/plb/opb/serial@ef600600", uart0);
360 void ibm405gp_fixup_clocks(unsigned int sysclk, unsigned int ser_clk)
362 u32 pllmr = mfdcr(DCRN_CPC0_PLLMR);
363 u32 cpc0_cr0 = mfdcr(DCRN_405_CPC0_CR0);
364 u32 cpc0_cr1 = mfdcr(DCRN_405_CPC0_CR1);
365 u32 cpu, plb, opb, ebc, tb, uart0, uart1, m;
366 u32 fwdv, fbdv, cbdv, opdv, epdv, udiv;
368 fwdv = (8 - ((pllmr & 0xe0000000) >> 29));
369 fbdv = (pllmr & 0x1e000000) >> 25;
370 cbdv = ((pllmr & 0x00060000) >> 17) + 1;
371 opdv = ((pllmr & 0x00018000) >> 15) + 1;
372 epdv = ((pllmr & 0x00001800) >> 13) + 2;
373 udiv = ((cpc0_cr0 & 0x3e) >> 1) + 1;
375 m = fwdv * fbdv * cbdv;
377 cpu = sysclk * m / fwdv;
382 if (cpc0_cr0 & 0x80) {
383 /* uart0 uses the external clock */
389 if (cpc0_cr0 & 0x40) {
390 /* uart1 uses the external clock */
396 /* setup the timebase clock to tick at the cpu frequency */
397 cpc0_cr1 = cpc0_cr1 & ~0x00800000;
398 mtdcr(DCRN_405_CPC0_CR1, cpc0_cr1);
401 dt_fixup_cpu_clocks(cpu, tb, 0);
402 dt_fixup_clock("/plb", plb);
403 dt_fixup_clock("/plb/opb", opb);
404 dt_fixup_clock("/plb/ebc", ebc);
405 dt_fixup_clock("/plb/opb/serial@ef600300", uart0);
406 dt_fixup_clock("/plb/opb/serial@ef600400", uart1);