]> git.ipfire.org Git - people/ms/u-boot.git/blob - board/tqc/tqm834x/tqm834x.c
rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / board / tqc / tqm834x / tqm834x.c
1 /*
2 * (C) Copyright 2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
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.
12 *
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.
17 *
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,
21 * MA 02111-1307 USA
22 *
23 */
24
25 #include <common.h>
26 #include <ioports.h>
27 #include <mpc83xx.h>
28 #include <asm/mpc8349_pci.h>
29 #include <i2c.h>
30 #include <miiphy.h>
31 #include <asm-ppc/mmu.h>
32 #include <pci.h>
33
34 DECLARE_GLOBAL_DATA_PTR;
35
36 #define IOSYNC asm("eieio")
37 #define ISYNC asm("isync")
38 #define SYNC asm("sync")
39 #define FPW FLASH_PORT_WIDTH
40 #define FPWV FLASH_PORT_WIDTHV
41
42 #define DDR_MAX_SIZE_PER_CS 0x20000000
43
44 #if defined(DDR_CASLAT_20)
45 #define TIMING_CASLAT TIMING_CFG1_CASLAT_20
46 #define MODE_CASLAT DDR_MODE_CASLAT_20
47 #else
48 #define TIMING_CASLAT TIMING_CFG1_CASLAT_25
49 #define MODE_CASLAT DDR_MODE_CASLAT_25
50 #endif
51
52 #define INITIAL_CS_CONFIG (CSCONFIG_EN | CSCONFIG_ROW_BIT_12 | \
53 CSCONFIG_COL_BIT_9)
54
55 /* Global variable used to store detected number of banks */
56 int tqm834x_num_flash_banks;
57
58 /* External definitions */
59 ulong flash_get_size (ulong base, int banknum);
60 extern flash_info_t flash_info[];
61
62 /* Local functions */
63 static int detect_num_flash_banks(void);
64 static long int get_ddr_bank_size(short cs, volatile long *base);
65 static void set_cs_bounds(short cs, long base, long size);
66 static void set_cs_config(short cs, long config);
67 static void set_ddr_config(void);
68
69 /* Local variable */
70 static volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
71
72 /**************************************************************************
73 * Board initialzation after relocation to RAM. Used to detect the number
74 * of Flash banks on TQM834x.
75 */
76 int board_early_init_r (void) {
77 /* sanity check, IMMARBAR should be mirrored at offset zero of IMMR */
78 if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
79 return 0;
80
81 /* detect the number of Flash banks */
82 return detect_num_flash_banks();
83 }
84
85 /**************************************************************************
86 * DRAM initalization and size detection
87 */
88 phys_size_t initdram (int board_type)
89 {
90 long bank_size;
91 long size;
92 int cs;
93
94 /* during size detection, set up the max DDRLAW size */
95 im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE;
96 im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G);
97
98 /* set CS bounds to maximum size */
99 for(cs = 0; cs < 4; ++cs) {
100 set_cs_bounds(cs,
101 CONFIG_SYS_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS),
102 DDR_MAX_SIZE_PER_CS);
103
104 set_cs_config(cs, INITIAL_CS_CONFIG);
105 }
106
107 /* configure ddr controller */
108 set_ddr_config();
109
110 udelay(200);
111
112 /* enable DDR controller */
113 im->ddr.sdram_cfg = (SDRAM_CFG_MEM_EN |
114 SDRAM_CFG_SREN |
115 SDRAM_CFG_SDRAM_TYPE_DDR1);
116 SYNC;
117
118 /* size detection */
119 debug("\n");
120 size = 0;
121 for(cs = 0; cs < 4; ++cs) {
122 debug("\nDetecting Bank%d\n", cs);
123
124 bank_size = get_ddr_bank_size(cs,
125 (volatile long*)(CONFIG_SYS_DDR_BASE + size));
126 size += bank_size;
127
128 debug("DDR Bank%d size: %d MiB\n\n", cs, bank_size >> 20);
129
130 /* exit if less than one bank */
131 if(size < DDR_MAX_SIZE_PER_CS) break;
132 }
133
134 return size;
135 }
136
137 /**************************************************************************
138 * checkboard()
139 */
140 int checkboard (void)
141 {
142 puts("Board: TQM834x\n");
143
144 #ifdef CONFIG_PCI
145 volatile immap_t * immr;
146 u32 w, f;
147
148 immr = (immap_t *)CONFIG_SYS_IMMR;
149 if (!(immr->reset.rcwh & HRCWH_PCI_HOST)) {
150 printf("PCI: NOT in host mode..?!\n");
151 return 0;
152 }
153
154 /* get bus width */
155 w = 32;
156 if (immr->reset.rcwh & HRCWH_64_BIT_PCI)
157 w = 64;
158
159 /* get clock */
160 f = gd->pci_clk;
161
162 printf("PCI1: %d bit, %d MHz\n", w, f / 1000000);
163 #else
164 printf("PCI: disabled\n");
165 #endif
166 return 0;
167 }
168
169
170 /**************************************************************************
171 *
172 * Local functions
173 *
174 *************************************************************************/
175
176 /**************************************************************************
177 * Detect the number of flash banks (1 or 2). Store it in
178 * a global variable tqm834x_num_flash_banks.
179 * Bank detection code based on the Monitor code.
180 */
181 static int detect_num_flash_banks(void)
182 {
183 typedef unsigned long FLASH_PORT_WIDTH;
184 typedef volatile unsigned long FLASH_PORT_WIDTHV;
185 FPWV *bank1_base;
186 FPWV *bank2_base;
187 FPW bank1_read;
188 FPW bank2_read;
189 ulong bank1_size;
190 ulong bank2_size;
191 ulong total_size;
192
193 tqm834x_num_flash_banks = 2; /* assume two banks */
194
195 /* Get bank 1 and 2 information */
196 bank1_size = flash_get_size(CONFIG_SYS_FLASH_BASE, 0);
197 debug("Bank1 size: %lu\n", bank1_size);
198 bank2_size = flash_get_size(CONFIG_SYS_FLASH_BASE + bank1_size, 1);
199 debug("Bank2 size: %lu\n", bank2_size);
200 total_size = bank1_size + bank2_size;
201
202 if (bank2_size > 0) {
203 /* Seems like we've got bank 2, but maybe it's mirrored 1 */
204
205 /* Set the base addresses */
206 bank1_base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
207 bank2_base = (FPWV *) (CONFIG_SYS_FLASH_BASE + bank1_size);
208
209 /* Put bank 2 into CFI command mode and read */
210 bank2_base[0x55] = 0x00980098;
211 IOSYNC;
212 ISYNC;
213 bank2_read = bank2_base[0x10];
214
215 /* Read from bank 1 (it's in read mode) */
216 bank1_read = bank1_base[0x10];
217
218 /* Reset Flash */
219 bank1_base[0] = 0x00F000F0;
220 bank2_base[0] = 0x00F000F0;
221
222 if (bank2_read == bank1_read) {
223 /*
224 * Looks like just one bank, but not sure yet. Let's
225 * read from bank 2 in autosoelect mode.
226 */
227 bank2_base[0x0555] = 0x00AA00AA;
228 bank2_base[0x02AA] = 0x00550055;
229 bank2_base[0x0555] = 0x00900090;
230 IOSYNC;
231 ISYNC;
232 bank2_read = bank2_base[0x10];
233
234 /* Read from bank 1 (it's in read mode) */
235 bank1_read = bank1_base[0x10];
236
237 /* Reset Flash */
238 bank1_base[0] = 0x00F000F0;
239 bank2_base[0] = 0x00F000F0;
240
241 if (bank2_read == bank1_read) {
242 /*
243 * In both CFI command and autoselect modes,
244 * we got the some data reading from Flash.
245 * There is only one mirrored bank.
246 */
247 tqm834x_num_flash_banks = 1;
248 total_size = bank1_size;
249 }
250 }
251 }
252
253 debug("Number of flash banks detected: %d\n", tqm834x_num_flash_banks);
254
255 /* set OR0 and BR0 */
256 im->lbus.bank[0].or = CONFIG_SYS_OR_TIMING_FLASH |
257 (-(total_size) & OR_GPCM_AM);
258 im->lbus.bank[0].br = (CONFIG_SYS_FLASH_BASE & BR_BA) |
259 (BR_MS_GPCM | BR_PS_32 | BR_V);
260
261 return (0);
262 }
263
264 /*************************************************************************
265 * Detect the size of a ddr bank. Sets CS bounds and CS config accordingly.
266 */
267 static long int get_ddr_bank_size(short cs, volatile long *base)
268 {
269 /* This array lists all valid DDR SDRAM configurations, with
270 * Bank sizes in bytes. (Refer to Table 9-27 in the MPC8349E RM).
271 * The last entry has to to have size equal 0 and is igonred during
272 * autodection. Bank sizes must be in increasing order of size
273 */
274 struct {
275 long row;
276 long col;
277 long size;
278 } conf[] = {
279 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_8, 32 << 20},
280 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_9, 64 << 20},
281 {CSCONFIG_ROW_BIT_12, CSCONFIG_COL_BIT_10, 128 << 20},
282 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_9, 128 << 20},
283 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_10, 256 << 20},
284 {CSCONFIG_ROW_BIT_13, CSCONFIG_COL_BIT_11, 512 << 20},
285 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_10, 512 << 20},
286 {CSCONFIG_ROW_BIT_14, CSCONFIG_COL_BIT_11, 1024 << 20},
287 {0, 0, 0}
288 };
289
290 int i;
291 int detected;
292 long size;
293
294 detected = -1;
295 for(i = 0; conf[i].size != 0; ++i) {
296
297 /* set sdram bank configuration */
298 set_cs_config(cs, CSCONFIG_EN | conf[i].col | conf[i].row);
299
300 debug("Getting RAM size...\n");
301 size = get_ram_size(base, DDR_MAX_SIZE_PER_CS);
302
303 if((size == conf[i].size) && (i == detected + 1))
304 detected = i;
305
306 debug("Trying %ld x %ld (%ld MiB) at addr %p, detected: %ld MiB\n",
307 conf[i].row,
308 conf[i].col,
309 conf[i].size >> 20,
310 base,
311 size >> 20);
312 }
313
314 if(detected == -1){
315 /* disable empty cs */
316 debug("\nNo valid configurations for CS%d, disabling...\n", cs);
317 set_cs_config(cs, 0);
318 return 0;
319 }
320
321 debug("\nDetected configuration %ld x %ld (%ld MiB) at addr %p\n",
322 conf[detected].row, conf[detected].col, conf[detected].size >> 20, base);
323
324 /* configure cs ro detected params */
325 set_cs_config(cs, CSCONFIG_EN | conf[detected].row |
326 conf[detected].col);
327
328 set_cs_bounds(cs, (long)base, conf[detected].size);
329
330 return(conf[detected].size);
331 }
332
333 /**************************************************************************
334 * Sets DDR bank CS bounds.
335 */
336 static void set_cs_bounds(short cs, long base, long size)
337 {
338 debug("Setting bounds %08x, %08x for cs %d\n", base, size, cs);
339 if(size == 0){
340 im->ddr.csbnds[cs].csbnds = 0x00000000;
341 } else {
342 im->ddr.csbnds[cs].csbnds =
343 ((base >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
344 (((base + size - 1) >> CSBNDS_EA_SHIFT) &
345 CSBNDS_EA);
346 }
347 SYNC;
348 }
349
350 /**************************************************************************
351 * Sets DDR banks CS configuration.
352 * config == 0x00000000 disables the CS.
353 */
354 static void set_cs_config(short cs, long config)
355 {
356 debug("Setting config %08x for cs %d\n", config, cs);
357 im->ddr.cs_config[cs] = config;
358 SYNC;
359 }
360
361 /**************************************************************************
362 * Sets DDR clocks, timings and configuration.
363 */
364 static void set_ddr_config(void) {
365 /* clock control */
366 im->ddr.sdram_clk_cntl = DDR_SDRAM_CLK_CNTL_SS_EN |
367 DDR_SDRAM_CLK_CNTL_CLK_ADJUST_05;
368 SYNC;
369
370 /* timing configuration */
371 im->ddr.timing_cfg_1 =
372 (4 << TIMING_CFG1_PRETOACT_SHIFT) |
373 (7 << TIMING_CFG1_ACTTOPRE_SHIFT) |
374 (4 << TIMING_CFG1_ACTTORW_SHIFT) |
375 (5 << TIMING_CFG1_REFREC_SHIFT) |
376 (3 << TIMING_CFG1_WRREC_SHIFT) |
377 (3 << TIMING_CFG1_ACTTOACT_SHIFT) |
378 (1 << TIMING_CFG1_WRTORD_SHIFT) |
379 (TIMING_CFG1_CASLAT & TIMING_CASLAT);
380
381 im->ddr.timing_cfg_2 =
382 TIMING_CFG2_CPO_DEF |
383 (2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT);
384 SYNC;
385
386 /* don't enable DDR controller yet */
387 im->ddr.sdram_cfg =
388 SDRAM_CFG_SREN |
389 SDRAM_CFG_SDRAM_TYPE_DDR1;
390 SYNC;
391
392 /* Set SDRAM mode */
393 im->ddr.sdram_mode =
394 ((DDR_MODE_EXT_MODEREG | DDR_MODE_WEAK) <<
395 SDRAM_MODE_ESD_SHIFT) |
396 ((DDR_MODE_MODEREG | DDR_MODE_BLEN_4) <<
397 SDRAM_MODE_SD_SHIFT) |
398 ((DDR_MODE_CASLAT << SDRAM_MODE_SD_SHIFT) &
399 MODE_CASLAT);
400 SYNC;
401
402 /* Set fast SDRAM refresh rate */
403 im->ddr.sdram_interval =
404 (DDR_REFINT_166MHZ_7US << SDRAM_INTERVAL_REFINT_SHIFT) |
405 (DDR_BSTOPRE << SDRAM_INTERVAL_BSTOPRE_SHIFT);
406 SYNC;
407
408 /* Workaround for DDR6 Erratum
409 * see MPC8349E Device Errata Rev.8, 2/2006
410 * This workaround influences the MPC internal "input enables"
411 * dependent on CAS latency and MPC revision. According to errata
412 * sheet the internal reserved registers for this workaround are
413 * not available from revision 2.0 and up.
414 */
415
416 /* Get REVID from register SPRIDR. Skip workaround if rev >= 2.0
417 * (0x200)
418 */
419 if ((im->sysconf.spridr & SPRIDR_REVID) < 0x200) {
420
421 /* There is a internal reserved register at IMMRBAR+0x2F00
422 * which has to be written with a certain value defined by
423 * errata sheet.
424 */
425 u32 *reserved_p = (u32 *)((u8 *)im + 0x2f00);
426
427 #if defined(DDR_CASLAT_20)
428 *reserved_p = 0x201c0000;
429 #else
430 *reserved_p = 0x202c0000;
431 #endif
432 }
433 }