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