4f491e60f2d9de372ebf7ee69f6135e6b0da1352
[platform/kernel/u-boot.git] / arch / arm / mach-omap2 / hwinit-common.c
1 /*
2  *
3  * Common functions for OMAP4/5 based boards
4  *
5  * (C) Copyright 2010
6  * Texas Instruments, <www.ti.com>
7  *
8  * Author :
9  *      Aneesh V        <aneesh@ti.com>
10  *      Steve Sakoman   <steve@sakoman.com>
11  *
12  * SPDX-License-Identifier:     GPL-2.0+
13  */
14 #include <common.h>
15 #include <debug_uart.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
24 DECLARE_GLOBAL_DATA_PTR;
25
26 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size)
27 {
28         int i;
29         struct pad_conf_entry *pad = (struct pad_conf_entry *) array;
30
31         for (i = 0; i < size; i++, pad++)
32                 writew(pad->val, base + pad->offset);
33 }
34
35 static void set_mux_conf_regs(void)
36 {
37         switch (omap_hw_init_context()) {
38         case OMAP_INIT_CONTEXT_SPL:
39                 set_muxconf_regs();
40                 break;
41         case OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL:
42                 break;
43         case OMAP_INIT_CONTEXT_UBOOT_FROM_NOR:
44         case OMAP_INIT_CONTEXT_UBOOT_AFTER_CH:
45                 set_muxconf_regs();
46                 break;
47         }
48 }
49
50 u32 cortex_rev(void)
51 {
52
53         unsigned int rev;
54
55         /* Read Main ID Register (MIDR) */
56         asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev));
57
58         return rev;
59 }
60
61 static void omap_rev_string(void)
62 {
63         u32 omap_rev = omap_revision();
64         u32 soc_variant = (omap_rev & 0xF0000000) >> 28;
65         u32 omap_variant = (omap_rev & 0xFFFF0000) >> 16;
66         u32 major_rev = (omap_rev & 0x00000F00) >> 8;
67         u32 minor_rev = (omap_rev & 0x000000F0) >> 4;
68
69         const char *sec_s, *package = NULL;
70
71         switch (get_device_type()) {
72         case TST_DEVICE:
73                 sec_s = "TST";
74                 break;
75         case EMU_DEVICE:
76                 sec_s = "EMU";
77                 break;
78         case HS_DEVICE:
79                 sec_s = "HS";
80                 break;
81         case GP_DEVICE:
82                 sec_s = "GP";
83                 break;
84         default:
85                 sec_s = "?";
86         }
87
88 #if defined(CONFIG_DRA7XX)
89         if (is_dra76x()) {
90                 switch (omap_rev & 0xF) {
91                 case DRA762_ABZ_PACKAGE:
92                         package = "ABZ";
93                         break;
94                 case DRA762_ACD_PACKAGE:
95                 default:
96                         package = "ACD";
97                         break;
98                 }
99         }
100 #endif
101
102         if (soc_variant)
103                 printf("OMAP");
104         else
105                 printf("DRA");
106         printf("%x-%s ES%x.%x", omap_variant, sec_s, major_rev, minor_rev);
107         if (package)
108                 printf(" %s package\n", package);
109         else
110                 puts("\n");
111 }
112
113 #ifdef CONFIG_SPL_BUILD
114 void spl_display_print(void)
115 {
116         omap_rev_string();
117 }
118 #endif
119
120 void __weak srcomp_enable(void)
121 {
122 }
123
124 /**
125  * do_board_detect() - Detect board description
126  *
127  * Function to detect board description. This is expected to be
128  * overridden in the SoC family board file where desired.
129  */
130 void __weak do_board_detect(void)
131 {
132 }
133
134 /**
135  * vcores_init() - Assign omap_vcores based on board
136  *
137  * Function to pick the vcores based on board. This is expected to be
138  * overridden in the SoC family board file where desired.
139  */
140 void __weak vcores_init(void)
141 {
142 }
143
144 void s_init(void)
145 {
146 }
147
148 /**
149  * init_package_revision() - Initialize package revision
150  *
151  * Function to get the pacakage information. This is expected to be
152  * overridden in the SoC family file where desired.
153  */
154 void __weak init_package_revision(void)
155 {
156 }
157
158 /**
159  * early_system_init - Does Early system initialization.
160  *
161  * Does early system init of watchdog, muxing,  andclocks
162  * Watchdog disable is done always. For the rest what gets done
163  * depends on the boot mode in which this function is executed when
164  *   1. SPL running from SRAM
165  *   2. U-Boot running from FLASH
166  *   3. U-Boot loaded to SDRAM by SPL
167  *   4. U-Boot loaded to SDRAM by ROM code using the
168  *      Configuration Header feature
169  * Please have a look at the respective functions to see what gets
170  * done in each of these cases
171  * This function is called with SRAM stack.
172  */
173 void early_system_init(void)
174 {
175         init_omap_revision();
176         hw_data_init();
177         init_package_revision();
178
179 #ifdef CONFIG_SPL_BUILD
180         if (warm_reset())
181                 force_emif_self_refresh();
182 #endif
183         watchdog_init();
184         set_mux_conf_regs();
185 #ifdef CONFIG_SPL_BUILD
186         srcomp_enable();
187         do_io_settings();
188 #endif
189         setup_early_clocks();
190 #ifdef CONFIG_SPL_BUILD
191         /*
192          * Save the boot parameters passed from romcode.
193          * We cannot delay the saving further than this,
194          * to prevent overwrites.
195          */
196         save_omap_boot_params();
197 #endif
198         do_board_detect();
199 #ifdef CONFIG_SPL_BUILD
200         spl_early_init();
201 #endif
202         vcores_init();
203 #ifdef CONFIG_DEBUG_UART_OMAP
204         debug_uart_init();
205 #endif
206         prcm_init();
207 }
208
209 #ifdef CONFIG_SPL_BUILD
210 void board_init_f(ulong dummy)
211 {
212         early_system_init();
213 #ifdef CONFIG_BOARD_EARLY_INIT_F
214         board_early_init_f();
215 #endif
216         /* For regular u-boot sdram_init() is called from dram_init() */
217         sdram_init();
218         gd->ram_size = omap_sdram_size();
219 }
220 #endif
221
222 int arch_cpu_init_dm(void)
223 {
224         early_system_init();
225         return 0;
226 }
227
228 /*
229  * Routine: wait_for_command_complete
230  * Description: Wait for posting to finish on watchdog
231  */
232 void wait_for_command_complete(struct watchdog *wd_base)
233 {
234         int pending = 1;
235         do {
236                 pending = readl(&wd_base->wwps);
237         } while (pending);
238 }
239
240 /*
241  * Routine: watchdog_init
242  * Description: Shut down watch dogs
243  */
244 void watchdog_init(void)
245 {
246         struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
247
248         writel(WD_UNLOCK1, &wd2_base->wspr);
249         wait_for_command_complete(wd2_base);
250         writel(WD_UNLOCK2, &wd2_base->wspr);
251 }
252
253
254 /*
255  * This function finds the SDRAM size available in the system
256  * based on DMM section configurations
257  * This is needed because the size of memory installed may be
258  * different on different versions of the board
259  */
260 u32 omap_sdram_size(void)
261 {
262         u32 section, i, valid;
263         u64 sdram_start = 0, sdram_end = 0, addr,
264             size, total_size = 0, trap_size = 0, trap_start = 0;
265
266         for (i = 0; i < 4; i++) {
267                 section = __raw_readl(DMM_BASE + i*4);
268                 valid = (section & EMIF_SDRC_ADDRSPC_MASK) >>
269                         (EMIF_SDRC_ADDRSPC_SHIFT);
270                 addr = section & EMIF_SYS_ADDR_MASK;
271
272                 /* See if the address is valid */
273                 if ((addr >= TI_ARMV7_DRAM_ADDR_SPACE_START) &&
274                     (addr < TI_ARMV7_DRAM_ADDR_SPACE_END)) {
275                         size = ((section & EMIF_SYS_SIZE_MASK) >>
276                                    EMIF_SYS_SIZE_SHIFT);
277                         size = 1 << size;
278                         size *= SZ_16M;
279
280                         if (valid != DMM_SDRC_ADDR_SPC_INVALID) {
281                                 if (!sdram_start || (addr < sdram_start))
282                                         sdram_start = addr;
283                                 if (!sdram_end || ((addr + size) > sdram_end))
284                                         sdram_end = addr + size;
285                         } else {
286                                 trap_size = size;
287                                 trap_start = addr;
288                         }
289                 }
290         }
291
292         if ((trap_start >= sdram_start) && (trap_start < sdram_end))
293                 total_size = (sdram_end - sdram_start) - (trap_size);
294         else
295                 total_size = sdram_end - sdram_start;
296
297         return total_size;
298 }
299
300
301 /*
302  * Routine: dram_init
303  * Description: sets uboots idea of sdram size
304  */
305 int dram_init(void)
306 {
307         sdram_init();
308         gd->ram_size = omap_sdram_size();
309         return 0;
310 }
311
312 /*
313  * Print board information
314  */
315 int checkboard(void)
316 {
317         puts(sysinfo.board_string);
318         return 0;
319 }
320
321 #if defined(CONFIG_DISPLAY_CPUINFO)
322 /*
323  * Print CPU information
324  */
325 int print_cpuinfo(void)
326 {
327         puts("CPU  : ");
328         omap_rev_string();
329
330         return 0;
331 }
332 #endif