1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 *
4 * Common functions for OMAP4/5 based boards
5 *
6 * (C) Copyright 2010
7 * Texas Instruments, <www.ti.com>
8 *
9 * Author :
10 * Aneesh V <aneesh@ti.com>
11 * Steve Sakoman <steve@sakoman.com>
12 */
13 #include <common.h>
14 #include <debug_uart.h>
15 #include <fdtdec.h>
16 #include <init.h>
17 #include <spl.h>
18 #include <asm/arch/sys_proto.h>
19 #include <asm/global_data.h>
20 #include <linux/sizes.h>
21 #include <asm/emif.h>
22 #include <asm/omap_common.h>
23 #include <linux/compiler.h>
24 #include <asm/system.h>
25 #include <dm/root.h>
26
27 DECLARE_GLOBAL_DATA_PTR;
28
do_set_mux(u32 base,struct pad_conf_entry const * array,int size)29 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
30 {
31 int i;
32 struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
33
34 for (i = 0; i < size; i++, pad++)
35 writew(pad->val, base + pad->offset);
36 }
37
set_mux_conf_regs(void)38 static void set_mux_conf_regs(void)
39 {
40 switch (omap_hw_init_context()) {
41 case OMAP_INIT_CONTEXT_SPL:
42 set_muxconf_regs();
43 break;
44 case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
45 break;
46 case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
47 case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
48 set_muxconf_regs();
49 break;
50 }
51 }
52
cortex_rev(void)53 u32 cortex_rev(void)
54 {
55
56 unsigned int rev;
57
58 /* Read Main ID Register (MIDR) */
59 asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
60
61 return rev;
62 }
63
omap_rev_string(void)64 static void omap_rev_string(void)
65 {
66 u32 omap_rev = omap_revision();
67 u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
68 u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
69 u32 major_rev = (omap_rev & 0x00000F00) >> 8;
70 u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
71
72 const char *sec_s, *package = NULL;
73
74 switch (get_device_type()) {
75 case TST_DEVICE:
76 sec_s = "TST";
77 break;
78 case EMU_DEVICE:
79 sec_s = "EMU";
80 break;
81 case HS_DEVICE:
82 sec_s = "HS";
83 break;
84 case GP_DEVICE:
85 sec_s = "GP";
86 break;
87 default:
88 sec_s = "?";
89 }
90
91 #if defined(CONFIG_DRA7XX)
92 if (is_dra76x()) {
93 switch (omap_rev & 0xF) {
94 case DRA762_ABZ_PACKAGE:
95 package = "ABZ";
96 break;
97 case DRA762_ACD_PACKAGE:
98 default:
99 package = "ACD";
100 break;
101 }
102 }
103 #endif
104
105 if (soc_variant)
106 printf("OMAP");
107 else
108 printf("DRA");
109 printf("%x-%s ES%x.%x", omap_variant, sec_s, major_rev, minor_rev);
110 if (package)
111 printf(" %s package\n", package);
112 else
113 puts("\n");
114 }
115
116 #ifdef CONFIG_SPL_BUILD
spl_display_print(void)117 void spl_display_print(void)
118 {
119 omap_rev_string();
120 }
121 #endif
122
srcomp_enable(void)123 void __weak srcomp_enable(void)
124 {
125 }
126
127 /**
128 * do_board_detect() - Detect board description
129 *
130 * Function to detect board description. This is expected to be
131 * overridden in the SoC family board file where desired.
132 */
do_board_detect(void)133 void __weak do_board_detect(void)
134 {
135 }
136
137 /**
138 * vcores_init() - Assign omap_vcores based on board
139 *
140 * Function to pick the vcores based on board. This is expected to be
141 * overridden in the SoC family board file where desired.
142 */
vcores_init(void)143 void __weak vcores_init(void)
144 {
145 }
146
s_init(void)147 void s_init(void)
148 {
149 }
150
151 /**
152 * init_package_revision() - Initialize package revision
153 *
154 * Function to get the pacakage information. This is expected to be
155 * overridden in the SoC family file where desired.
156 */
init_package_revision(void)157 void __weak init_package_revision(void)
158 {
159 }
160
161 /**
162 * early_system_init - Does Early system initialization.
163 *
164 * Does early system init of watchdog, muxing, andclocks
165 * Watchdog disable is done always. For the rest what gets done
166 * depends on the boot mode in which this function is executed when
167 * 1. SPL running from SRAM
168 * 2. U-Boot running from FLASH
169 * 3. U-Boot loaded to SDRAM by SPL
170 * 4. U-Boot loaded to SDRAM by ROM code using the
171 * Configuration Header feature
172 * Please have a look at the respective functions to see what gets
173 * done in each of these cases
174 * This function is called with SRAM stack.
175 */
early_system_init(void)176 void early_system_init(void)
177 {
178 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
179 int ret;
180 int rescan;
181 #endif
182 init_omap_revision();
183 hw_data_init();
184 init_package_revision();
185
186 #ifdef CONFIG_SPL_BUILD
187 if (warm_reset())
188 force_emif_self_refresh();
189 #endif
190 watchdog_init();
191 set_mux_conf_regs();
192 #ifdef CONFIG_SPL_BUILD
193 srcomp_enable();
194 do_io_settings();
195 #endif
196 setup_early_clocks();
197
198 #ifdef CONFIG_SPL_BUILD
199 /*
200 * Save the boot parameters passed from romcode.
201 * We cannot delay the saving further than this,
202 * to prevent overwrites.
203 */
204 save_omap_boot_params();
205 spl_early_init();
206 #endif
207 do_board_detect();
208
209 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MULTI_DTB_FIT)
210 /*
211 * Board detection has been done.
212 * Let us see if another dtb wouldn't be a better match
213 * for our board
214 */
215 ret = fdtdec_resetup(&rescan);
216 if (!ret && rescan) {
217 dm_uninit();
218 dm_init_and_scan(true);
219 }
220 #endif
221
222 vcores_init();
223 #ifdef CONFIG_DEBUG_UART_OMAP
224 debug_uart_init();
225 #endif
226 prcm_init();
227 }
228
229 #ifdef CONFIG_SPL_BUILD
board_init_f(ulong dummy)230 void board_init_f(ulong dummy)
231 {
232 early_system_init();
233 #ifdef CONFIG_BOARD_EARLY_INIT_F
234 board_early_init_f();
235 #endif
236 /* For regular u-boot sdram_init() is called from dram_init() */
237 sdram_init();
238 gd->ram_size = omap_sdram_size();
239 }
240 #endif
241
arch_cpu_init_dm(void)242 int arch_cpu_init_dm(void)
243 {
244 early_system_init();
245 return 0;
246 }
247
248 /*
249 * Routine: wait_for_command_complete
250 * Description: Wait for posting to finish on watchdog
251 */
wait_for_command_complete(struct watchdog * wd_base)252 void wait_for_command_complete(struct watchdog *wd_base)
253 {
254 int pending = 1;
255 do {
256 pending = readl(&wd_base->wwps);
257 } while (pending);
258 }
259
260 /*
261 * Routine: watchdog_init
262 * Description: Shut down watch dogs
263 */
watchdog_init(void)264 void watchdog_init(void)
265 {
266 struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
267
268 writel(WD_UNLOCK1, &wd2_base->wspr);
269 wait_for_command_complete(wd2_base);
270 writel(WD_UNLOCK2, &wd2_base->wspr);
271 }
272
273
274 /*
275 * This function finds the SDRAM size available in the system
276 * based on DMM section configurations
277 * This is needed because the size of memory installed may be
278 * different on different versions of the board
279 */
omap_sdram_size(void)280 u32 omap_sdram_size(void)
281 {
282 u32 section, i, valid;
283 u64 sdram_start = 0, sdram_end = 0, addr,
284 size, total_size = 0, trap_size = 0, trap_start = 0;
285
286 for (i = 0; i < 4; i++) {
287 section = __raw_readl(DMM_BASE + i*4);
288 valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
289 (EMIF_SDRC_ADDRSPC_SHIFT);
290 addr = section & EMIF_SYS_ADDR_MASK;
291
292 /* See if the address is valid */
293 if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
294 (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
295 size = ((section & EMIF_SYS_SIZE_MASK) >>
296 EMIF_SYS_SIZE_SHIFT);
297 size = 1 << size;
298 size *= SZ_16M;
299
300 if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
301 if (!sdram_start || (addr < sdram_start))
302 sdram_start = addr;
303 if (!sdram_end || ((addr + size) > sdram_end))
304 sdram_end = addr + size;
305 } else {
306 trap_size = size;
307 trap_start = addr;
308 }
309 }
310 }
311
312 if ((trap_start >= sdram_start) && (trap_start < sdram_end))
313 total_size = (sdram_end - sdram_start) - (trap_size);
314 else
315 total_size = sdram_end - sdram_start;
316
317 return total_size;
318 }
319
320
321 /*
322 * Routine: dram_init
323 * Description: sets uboots idea of sdram size
324 */
dram_init(void)325 int dram_init(void)
326 {
327 sdram_init();
328 gd->ram_size = omap_sdram_size();
329 return 0;
330 }
331
332 /*
333 * Print board information
334 */
checkboard(void)335 int checkboard(void)
336 {
337 puts(sysinfo.board_string);
338 return 0;
339 }
340
341 #if defined(CONFIG_DISPLAY_CPUINFO)
342 /*
343 * Print CPU information
344 */
print_cpuinfo(void)345 int print_cpuinfo(void)
346 {
347 puts("CPU : ");
348 omap_rev_string();
349
350 return 0;
351 }
352 #endif
353