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