1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
/*
* (C) Copyright 2004
* Texas Instruments, <www.ti.com>
* Richard Woodruff <r-woodruff2@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/omap2420.h>
#include <asm/io.h>
#include <asm/arch/bits.h>
#include <asm/arch/mem.h> /* get mem tables */
#include <asm/arch/sys_proto.h>
#include <asm/arch/sys_info.h>
#include <i2c.h>
/**************************************************************************
* get_cpu_type() - low level get cpu type
* - no C globals yet.
* - just looking to say if this is a 2422 or 2420 or ...
* - to start with we will look at switch settings..
* - 2422 id's same as 2420 for ES1 will rely on H4 board characteristics
* (mux for 2420, non-mux for 2422).
***************************************************************************/
u32 get_cpu_type(void)
{
u32 v;
v = __raw_readl(TAP_IDCODE_REG);
v &= CPU_24XX_ID_MASK;
if (v == CPU_2420_CHIPID) { /* currently 2420 and 2422 have same id */
if (is_gpmc_muxed() == GPMC_MUXED) /* if mux'ed */
return(CPU_2420);
else
return(CPU_2422);
} else
return(CPU_2420); /* don't know, say 2420 */
}
/******************************************
* get_cpu_rev(void) - extract version info
******************************************/
u32 get_cpu_rev(void)
{
u32 v;
v = __raw_readl(TAP_IDCODE_REG);
v = v >> 28;
return(v+1); /* currently 2422 and 2420 match up */
}
/***********************************************************
* get_mem_type() - identify type of mDDR part used.
* 2422 uses stacked DDR, 2 parts CS0/CS1.
* 2420 may have 1 or 2, no good way to know...only init 1...
* when eeprom data is up we can select 1 more.
*************************************************************/
u32 get_mem_type(void)
{
volatile u32 *burst = (volatile u32 *)(SDRC_MR_0+SDRC_CS0_OSET);
if (get_cpu_type() == CPU_2422)
return(DDR_STACKED);
if (get_board_type() == BOARD_H4_MENELAUS)
if(*burst == H4_2420_SDRC_MR_0_SDR)
return(SDR_DISCRETE);
else
return(DDR_COMBO);
else
if(*burst == H4_2420_SDRC_MR_0_SDR) /* SDP + SDR kit */
return(SDR_DISCRETE);
else
return(DDR_DISCRETE); /* origional SDP */
}
/***********************************************************************
* get_board_type() - get board type based on current production stats.
* --- NOTE: 2 I2C EEPROMs will someday be populated with proper info.
* when they are available we can get info from there. This should
* be correct of all known boards up until today.
************************************************************************/
u32 get_board_type(void)
{
if (i2c_probe(I2C_MENELAUS) == 0)
return(BOARD_H4_MENELAUS);
else
return(BOARD_H4_SDP);
}
/******************************************************************
* get_sysboot_value() - get init word settings (dip switch on h4)
******************************************************************/
u32 get_sysboot_value(void)
{
return(0x00000FFF & __raw_readl(CONTROL_STATUS));
}
/***************************************************************************
* get_gpmc0_base() - Return current address hardware will be
* fetching from. The below effectively gives what is correct, its a bit
* mis-leading compared to the TRM. For the most general case the mask
* needs to be also taken into account this does work in practice.
* - for u-boot we currently map:
* -- 0 to nothing,
* -- 4 to flash
* -- 8 to enent
* -- c to wifi
****************************************************************************/
u32 get_gpmc0_base(void)
{
u32 b;
b = __raw_readl(GPMC_CONFIG7_0);
b &= 0x1F; /* keep base [5:0] */
b = b << 24; /* ret 0x0b000000 */
return(b);
}
/*****************************************************************
* is_gpmc_muxed() - tells if address/data lines are multiplexed
*****************************************************************/
u32 is_gpmc_muxed(void)
{
u32 mux;
mux = get_sysboot_value();
if ((mux & (BIT0 | BIT1 | BIT2 | BIT3)) == (BIT0 | BIT2 | BIT3))
return(GPMC_MUXED); /* NAND Boot mode */
if (mux & BIT1) /* if mux'ed */
return(GPMC_MUXED);
else
return(GPMC_NONMUXED);
}
/************************************************************************
* get_gpmc0_type() - read sysboot lines to see type of memory attached
************************************************************************/
u32 get_gpmc0_type(void)
{
u32 type;
type = get_sysboot_value();
if ((type & (BIT3|BIT2)) == (BIT3|BIT2))
return(TYPE_NAND);
else
return(TYPE_NOR);
}
/*******************************************************************
* get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand)
*******************************************************************/
u32 get_gpmc0_width(void)
{
u32 width;
width = get_sysboot_value();
if ((width & 0xF) == (BIT3|BIT2))
return(WIDTH_8BIT);
else
return(WIDTH_16BIT);
}
/*********************************************************************
* wait_on_value() - common routine to allow waiting for changes in
* volatile regs.
*********************************************************************/
u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
{
u32 i = 0, val;
do {
++i;
val = __raw_readl(read_addr) & read_bit_mask;
if (val == match_value)
return(1);
if (i==bound)
return(0);
} while (1);
}
/*********************************************************************
* display_board_info() - print banner with board info.
*********************************************************************/
void display_board_info(u32 btype)
{
char cpu_2420[] = "2420";
char cpu_2422[] = "2422";
char db_men[] = "Menelaus";
char db_ip[]= "IP";
char *cpu_s, *db_s;
u32 cpu = get_cpu_type();
if(cpu == CPU_2420)
cpu_s = cpu_2420;
else
cpu_s = cpu_2422;
if(btype == BOARD_H4_MENELAUS)
db_s = db_men;
else
db_s = db_ip;
printf("TI H4 SDP Base Board with OMAP%s %s Daughter Board\n",cpu_s, db_s);
}
/*************************************************************************
* get_board_rev() - setup to pass kernel board revision information
* 0 = 242x IP platform (first 2xx boards)
* 1 = 242x Menelaus platfrom.
*************************************************************************/
u32 get_board_rev(void)
{
u32 rev = 0;
u32 btype = get_board_type();
if (btype == BOARD_H4_MENELAUS){
rev = 1;
}
return(rev);
}
/********************************************************
* get_base(); get upper addr of current execution
*******************************************************/
static u32 get_base(void)
{
u32 val;
__asm__ __volatile__("mov %0, pc \n" : "=r" (val) : : "memory");
val &= 0xF0000000;
val >>= 28;
return(val);
}
/********************************************************
* get_base2(); get 2upper addr of current execution
*******************************************************/
static u32 get_base2(void)
{
u32 val;
__asm__ __volatile__("mov %0, pc \n" : "=r" (val) : : "memory");
val &= 0xFF000000;
val >>= 24;
return(val);
}
/********************************************************
* running_in_flash() - tell if currently running in
* flash.
*******************************************************/
u32 running_in_flash(void)
{
if (get_base() < 4)
return(1); /* in flash */
return(0); /* running in SRAM or SDRAM */
}
/********************************************************
* running_in_sram() - tell if currently running in
* sram.
*******************************************************/
u32 running_in_sram(void)
{
if (get_base() == 4)
return(1); /* in SRAM */
return(0); /* running in FLASH or SDRAM */
}
/********************************************************
* running_in_sdram() - tell if currently running in
* flash.
*******************************************************/
u32 running_in_sdram(void)
{
if (get_base() > 4)
return(1); /* in sdram */
return(0); /* running in SRAM or FLASH */
}
/*************************************************************
* running_from_internal_boot() - am I a signed NOR image.
*************************************************************/
u32 running_from_internal_boot(void)
{
u32 v, base;
v = get_sysboot_value() & BIT3;
base = get_base2();
/* if running at mask rom flash address and
* sysboot3 says this was an internal boot
*/
if ((base == 0x08) && v)
return(1);
else
return(0);
}
|
