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[karo-tx-uboot.git] / arch / arm / cpu / armv7 / omap3 / sys_info.c
1 /*
2  * (C) Copyright 2008
3  * Texas Instruments, <www.ti.com>
4  *
5  * Author :
6  *      Manikandan Pillai <mani.pillai@ti.com>
7  *
8  * Derived from Beagle Board and 3430 SDP code by
9  *      Richard Woodruff <r-woodruff2@ti.com>
10  *      Syed Mohammed Khasim <khasim@ti.com>
11  *
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.
16  *
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.
21  *
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,
25  * MA 02111-1307 USA
26  */
27
28 #include <common.h>
29 #include <asm/io.h>
30 #include <asm/arch/mem.h>       /* get mem tables */
31 #include <asm/arch/sys_proto.h>
32 #include <i2c.h>
33
34 extern omap3_sysinfo sysinfo;
35 static struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
36
37 #ifdef CONFIG_DISPLAY_CPUINFO
38 static char *rev_s[CPU_3XX_MAX_REV] = {
39                                 "1.0",
40                                 "2.0",
41                                 "2.1",
42                                 "3.0",
43                                 "3.1",
44                                 "UNKNOWN",
45                                 "UNKNOWN",
46                                 "3.1.2"};
47 #endif /* CONFIG_DISPLAY_CPUINFO */
48
49 /*****************************************************************
50  * dieid_num_r(void) - read and set die ID
51  *****************************************************************/
52 void dieid_num_r(void)
53 {
54         struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
55         char *uid_s, die_id[34];
56         u32 id[4];
57
58         memset(die_id, 0, sizeof(die_id));
59
60         uid_s = getenv("dieid#");
61
62         if (uid_s == NULL) {
63                 id[3] = readl(&id_base->die_id_0);
64                 id[2] = readl(&id_base->die_id_1);
65                 id[1] = readl(&id_base->die_id_2);
66                 id[0] = readl(&id_base->die_id_3);
67                 sprintf(die_id, "%08x%08x%08x%08x", id[0], id[1], id[2], id[3]);
68                 setenv("dieid#", die_id);
69                 uid_s = die_id;
70         }
71
72         printf("Die ID #%s\n", uid_s);
73 }
74
75 /******************************************
76  * get_cpu_type(void) - extract cpu info
77  ******************************************/
78 u32 get_cpu_type(void)
79 {
80         return readl(&ctrl_base->ctrl_omap_stat);
81 }
82
83 /******************************************
84  * get_cpu_id(void) - extract cpu id
85  * returns 0 for ES1.0, cpuid otherwise
86  ******************************************/
87 u32 get_cpu_id(void)
88 {
89         struct ctrl_id *id_base;
90         u32 cpuid = 0;
91
92         /*
93          * On ES1.0 the IDCODE register is not exposed on L4
94          * so using CPU ID to differentiate between ES1.0 and > ES1.0.
95          */
96         __asm__ __volatile__("mrc p15, 0, %0, c0, c0, 0":"=r"(cpuid));
97         if ((cpuid & 0xf) == 0x0) {
98                 return 0;
99         } else {
100                 /* Decode the IDs on > ES1.0 */
101                 id_base = (struct ctrl_id *) OMAP34XX_ID_L4_IO_BASE;
102
103                 cpuid = readl(&id_base->idcode);
104         }
105
106         return cpuid;
107 }
108
109 /******************************************
110  * get_cpu_family(void) - extract cpu info
111  ******************************************/
112 u32 get_cpu_family(void)
113 {
114         u16 hawkeye;
115         u32 cpu_family;
116         u32 cpuid = get_cpu_id();
117
118         if (cpuid == 0)
119                 return CPU_OMAP34XX;
120
121         hawkeye = (cpuid >> HAWKEYE_SHIFT) & 0xffff;
122         switch (hawkeye) {
123         case HAWKEYE_OMAP34XX:
124                 cpu_family = CPU_OMAP34XX;
125                 break;
126         case HAWKEYE_AM35XX:
127                 cpu_family = CPU_AM35XX;
128                 break;
129         case HAWKEYE_OMAP36XX:
130                 cpu_family = CPU_OMAP36XX;
131                 break;
132         default:
133                 cpu_family = CPU_OMAP34XX;
134         }
135
136         return cpu_family;
137 }
138
139 /******************************************
140  * get_cpu_rev(void) - extract version info
141  ******************************************/
142 u32 get_cpu_rev(void)
143 {
144         u32 cpuid = get_cpu_id();
145
146         if (cpuid == 0)
147                 return CPU_3XX_ES10;
148         else
149                 return (cpuid >> CPU_3XX_ID_SHIFT) & 0xf;
150 }
151
152 /*****************************************************************
153  * get_sku_id(void) - read sku_id to get info on max clock rate
154  *****************************************************************/
155 u32 get_sku_id(void)
156 {
157         struct ctrl_id *id_base = (struct ctrl_id *)OMAP34XX_ID_L4_IO_BASE;
158         return readl(&id_base->sku_id) & SKUID_CLK_MASK;
159 }
160
161 /***************************************************************************
162  *  get_gpmc0_base() - Return current address hardware will be
163  *     fetching from. The below effectively gives what is correct, its a bit
164  *   mis-leading compared to the TRM.  For the most general case the mask
165  *   needs to be also taken into account this does work in practice.
166  *   - for u-boot we currently map:
167  *       -- 0 to nothing,
168  *       -- 4 to flash
169  *       -- 8 to enent
170  *       -- c to wifi
171  ****************************************************************************/
172 u32 get_gpmc0_base(void)
173 {
174         u32 b;
175
176         b = readl(&gpmc_cfg->cs[0].config7);
177         b &= 0x1F;              /* keep base [5:0] */
178         b = b << 24;            /* ret 0x0b000000 */
179         return b;
180 }
181
182 /*******************************************************************
183  * get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand)
184  *******************************************************************/
185 u32 get_gpmc0_width(void)
186 {
187         return WIDTH_16BIT;
188 }
189
190 /*************************************************************************
191  * get_board_rev() - setup to pass kernel board revision information
192  * returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
193  *************************************************************************/
194 u32 get_board_rev(void)
195 {
196         return 0x20;
197 }
198
199 /********************************************************
200  *  get_base(); get upper addr of current execution
201  *******************************************************/
202 u32 get_base(void)
203 {
204         u32 val;
205
206         __asm__ __volatile__("mov %0, pc \n":"=r"(val)::"memory");
207         val &= 0xF0000000;
208         val >>= 28;
209         return val;
210 }
211
212 /********************************************************
213  *  is_running_in_flash() - tell if currently running in
214  *  FLASH.
215  *******************************************************/
216 u32 is_running_in_flash(void)
217 {
218         if (get_base() < 4)
219                 return 1;       /* in FLASH */
220
221         return 0;               /* running in SRAM or SDRAM */
222 }
223
224 /********************************************************
225  *  is_running_in_sram() - tell if currently running in
226  *  SRAM.
227  *******************************************************/
228 u32 is_running_in_sram(void)
229 {
230         if (get_base() == 4)
231                 return 1;       /* in SRAM */
232
233         return 0;               /* running in FLASH or SDRAM */
234 }
235
236 /********************************************************
237  *  is_running_in_sdram() - tell if currently running in
238  *  SDRAM.
239  *******************************************************/
240 u32 is_running_in_sdram(void)
241 {
242         if (get_base() > 4)
243                 return 1;       /* in SDRAM */
244
245         return 0;               /* running in SRAM or FLASH */
246 }
247
248 /***************************************************************
249  *  get_boot_type() - Is this an XIP type device or a stream one
250  *  bits 4-0 specify type. Bit 5 says mem/perif
251  ***************************************************************/
252 u32 get_boot_type(void)
253 {
254         return (readl(&ctrl_base->status) & SYSBOOT_MASK);
255 }
256
257 /*************************************************************
258  *  get_device_type(): tell if GP/HS/EMU/TST
259  *************************************************************/
260 u32 get_device_type(void)
261 {
262         return ((readl(&ctrl_base->status) & (DEVICE_MASK)) >> 8);
263 }
264
265 #ifdef CONFIG_DISPLAY_CPUINFO
266 /**
267  * Print CPU information
268  */
269 int print_cpuinfo (void)
270 {
271         char *cpu_family_s, *cpu_s, *sec_s, *max_clk;
272
273         switch (get_cpu_family()) {
274         case CPU_OMAP34XX:
275                 cpu_family_s = "OMAP";
276                 switch (get_cpu_type()) {
277                 case OMAP3503:
278                         cpu_s = "3503";
279                         break;
280                 case OMAP3515:
281                         cpu_s = "3515";
282                         break;
283                 case OMAP3525:
284                         cpu_s = "3525";
285                         break;
286                 case OMAP3530:
287                         cpu_s = "3530";
288                         break;
289                 default:
290                         cpu_s = "35XX";
291                         break;
292                 }
293                 if ((get_cpu_rev() >= CPU_3XX_ES31) &&
294                     (get_sku_id() == SKUID_CLK_720MHZ))
295                         max_clk = "720 mHz";
296                 else
297                         max_clk = "600 mHz";
298
299                 break;
300         case CPU_AM35XX:
301                 cpu_family_s = "AM";
302                 switch (get_cpu_type()) {
303                 case AM3505:
304                         cpu_s = "3505";
305                         break;
306                 case AM3517:
307                         cpu_s = "3517";
308                         break;
309                 default:
310                         cpu_s = "35XX";
311                         break;
312                 }
313                 max_clk = "600 Mhz";
314                 break;
315         case CPU_OMAP36XX:
316                 cpu_family_s = "OMAP";
317                 switch (get_cpu_type()) {
318                 case OMAP3730:
319                         cpu_s = "3630/3730";
320                         break;
321                 default:
322                         cpu_s = "36XX/37XX";
323                         break;
324                 }
325                 max_clk = "1 Ghz";
326                 break;
327         default:
328                 cpu_family_s = "OMAP";
329                 cpu_s = "35XX";
330                 max_clk = "600 Mhz";
331         }
332
333         switch (get_device_type()) {
334         case TST_DEVICE:
335                 sec_s = "TST";
336                 break;
337         case EMU_DEVICE:
338                 sec_s = "EMU";
339                 break;
340         case HS_DEVICE:
341                 sec_s = "HS";
342                 break;
343         case GP_DEVICE:
344                 sec_s = "GP";
345                 break;
346         default:
347                 sec_s = "?";
348         }
349
350         printf("%s%s-%s ES%s, CPU-OPP2, L3-165MHz, Max CPU Clock %s\n",
351                         cpu_family_s, cpu_s, sec_s,
352                         rev_s[get_cpu_rev()], max_clk);
353
354         return 0;
355 }
356 #endif  /* CONFIG_DISPLAY_CPUINFO */