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
333