1// SPDX-License-Identifier: GPL-2.0
2/*
3 * board/renesas/alt/alt_spl.c
4 *
5 * Copyright (C) 2018 Marek Vasut <marek.vasut@gmail.com>
6 */
7
8#include <cpu_func.h>
9#include <init.h>
10#include <malloc.h>
11#include <dm/platform_data/serial_sh.h>
12#include <asm/processor.h>
13#include <asm/mach-types.h>
14#include <asm/io.h>
15#include <linux/bitops.h>
16#include <linux/errno.h>
17#include <asm/arch/sys_proto.h>
18#include <asm/gpio.h>
19#include <asm/arch/renesas.h>
20#include <asm/arch/rcar-mstp.h>
21
22#include <spl.h>
23
24#define TMU0_MSTP125	BIT(25)
25#define SCIF2_MSTP719	BIT(19)
26#define QSPI_MSTP917	BIT(17)
27
28#define SD1CKCR		0xE6150078
29#define SD_97500KHZ	0x7
30
31struct reg_config {
32	u16	off;
33	u32	val;
34};
35
36static void dbsc_wait(u16 reg)
37{
38	static const u32 dbsc3_0_base = DBSC3_0_BASE;
39
40	while (!(readl(dbsc3_0_base + reg) & BIT(0)))
41		;
42}
43
44static void spl_init_sys(void)
45{
46	u32 r0 = 0;
47
48	writel(0xa5a5a500, 0xe6020004);
49	writel(0xa5a5a500, 0xe6030004);
50
51	asm volatile(
52		/* ICIALLU - Invalidate I$ to PoU */
53		"mcr	15, 0, %0, cr7, cr5, 0	\n"
54		/* BPIALL - Invalidate branch predictors */
55		"mcr	15, 0, %0, cr7, cr5, 6	\n"
56		/* Set SCTLR[IZ] */
57		"mrc	15, 0, %0, cr1, cr0, 0	\n"
58		"orr	%0, #0x1800		\n"
59		"mcr	15, 0, %0, cr1, cr0, 0	\n"
60		"isb	sy			\n"
61		:"=r"(r0));
62}
63
64static void spl_init_pfc(void)
65{
66	static const struct reg_config pfc_with_unlock[] = {
67		{ 0x0090, 0x00000000 },
68		{ 0x0094, 0x00000000 },
69		{ 0x0098, 0x00000000 },
70		{ 0x0020, 0x00000000 },
71		{ 0x0024, 0x00000000 },
72		{ 0x0028, 0x40000000 },
73		{ 0x002c, 0x00000155 },
74		{ 0x0030, 0x00000002 },
75		{ 0x0034, 0x00000000 },
76		{ 0x0038, 0x00000000 },
77		{ 0x003c, 0x00000000 },
78		{ 0x0040, 0x60000000 },
79		{ 0x0044, 0x36dab6db },
80		{ 0x0048, 0x926da012 },
81		{ 0x004c, 0x0008c383 },
82		{ 0x0050, 0x00000000 },
83		{ 0x0054, 0x00000140 },
84		{ 0x0004, 0xffffffff },
85		{ 0x0008, 0x00ec3fff },
86		{ 0x000c, 0x5bffffff },
87		{ 0x0010, 0x01bfe1ff },
88		{ 0x0014, 0x5bffffff },
89		{ 0x0018, 0x0f4b200f },
90		{ 0x001c, 0x03ffffff },
91	};
92
93	static const struct reg_config pfc_without_unlock[] = {
94		{ 0x0100, 0x00000000 },
95		{ 0x0104, 0x4203fc00 },
96		{ 0x0108, 0x00000000 },
97		{ 0x010c, 0x159007ff },
98		{ 0x0110, 0x80000000 },
99		{ 0x0114, 0x00de481f },
100		{ 0x0118, 0x00000000 },
101	};
102
103	static const struct reg_config pfc_with_unlock2[] = {
104		{ 0x0060, 0xffffffff },
105		{ 0x0064, 0xfffff000 },
106		{ 0x0068, 0x55555500 },
107		{ 0x006c, 0xffffff00 },
108		{ 0x0070, 0x00000000 },
109	};
110
111	static const u32 pfc_base = 0xe6060000;
112
113	unsigned int i;
114
115	for (i = 0; i < ARRAY_SIZE(pfc_with_unlock); i++) {
116		writel(~pfc_with_unlock[i].val, pfc_base);
117		writel(pfc_with_unlock[i].val,
118		       pfc_base | pfc_with_unlock[i].off);
119	}
120
121	for (i = 0; i < ARRAY_SIZE(pfc_without_unlock); i++)
122		writel(pfc_without_unlock[i].val,
123		       pfc_base | pfc_without_unlock[i].off);
124
125	for (i = 0; i < ARRAY_SIZE(pfc_with_unlock2); i++) {
126		writel(~pfc_with_unlock2[i].val, pfc_base);
127		writel(pfc_with_unlock2[i].val,
128		       pfc_base | pfc_with_unlock2[i].off);
129	}
130}
131
132static void spl_init_gpio(void)
133{
134	static const u16 gpio_offs[] = {
135		0x1000, 0x2000, 0x3000, 0x4000, 0x5000
136	};
137
138	static const struct reg_config gpio_set[] = {
139		{ 0x2000, 0x24000000 },
140		{ 0x4000, 0xa4000000 },
141		{ 0x5000, 0x0004c000 },
142	};
143
144	static const struct reg_config gpio_clr[] = {
145		{ 0x1000, 0x01000000 },
146		{ 0x2000, 0x24000000 },
147		{ 0x3000, 0x00000000 },
148		{ 0x4000, 0xa4000000 },
149		{ 0x5000, 0x0084c380 },
150	};
151
152	static const u32 gpio_base = 0xe6050000;
153
154	unsigned int i;
155
156	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
157		writel(0, gpio_base | 0x20 | gpio_offs[i]);
158
159	for (i = 0; i < ARRAY_SIZE(gpio_offs); i++)
160		writel(0, gpio_base | 0x00 | gpio_offs[i]);
161
162	for (i = 0; i < ARRAY_SIZE(gpio_set); i++)
163		writel(gpio_set[i].val, gpio_base | 0x08 | gpio_set[i].off);
164
165	for (i = 0; i < ARRAY_SIZE(gpio_clr); i++)
166		writel(gpio_clr[i].val, gpio_base | 0x04 | gpio_clr[i].off);
167}
168
169static void spl_init_lbsc(void)
170{
171	static const struct reg_config lbsc_config[] = {
172		{ 0x00, 0x00000020 },
173		{ 0x08, 0x00002020 },
174		{ 0x30, 0x2a103320 },
175		{ 0x38, 0xff70ff70 },
176	};
177
178	static const u16 lbsc_offs[] = {
179		0x80, 0x84, 0x88, 0x8c, 0xa0, 0xc0, 0xc4, 0xc8
180	};
181
182	static const u32 lbsc_base = 0xfec00200;
183
184	unsigned int i;
185
186	for (i = 0; i < ARRAY_SIZE(lbsc_config); i++) {
187		writel(lbsc_config[i].val,
188		       lbsc_base | lbsc_config[i].off);
189		writel(lbsc_config[i].val,
190		       lbsc_base | (lbsc_config[i].off + 4));
191	}
192
193	for (i = 0; i < ARRAY_SIZE(lbsc_offs); i++)
194		writel(0, lbsc_base | lbsc_offs[i]);
195}
196
197static void spl_init_dbsc(void)
198{
199	static const struct reg_config dbsc_config1[] = {
200		{ 0x0018, 0x21000000 },
201		{ 0x0018, 0x11000000 },
202		{ 0x0018, 0x10000000 },
203		{ 0x0280, 0x0000a55a },
204		{ 0x0290, 0x00000001 },
205		{ 0x02a0, 0x80000000 },
206		{ 0x0290, 0x00000004 },
207	};
208
209	static const struct reg_config dbsc_config2[] = {
210		{ 0x0290, 0x00000006 },
211		{ 0x02a0, 0x0005c000 },
212	};
213
214	static const struct reg_config dbsc_config4[] = {
215		{ 0x0290, 0x00000010 },
216		{ 0x02a0, 0xf00464db },
217		{ 0x0290, 0x00000061 },
218		{ 0x02a0, 0x0000006d },
219		{ 0x0290, 0x00000001 },
220		{ 0x02a0, 0x00000073 },
221		{ 0x0020, 0x00000007 },
222		{ 0x0024, 0x0f030a02 },
223		{ 0x0030, 0x00000001 },
224		{ 0x00b0, 0x00000000 },
225		{ 0x0040, 0x00000009 },
226		{ 0x0044, 0x00000007 },
227		{ 0x0048, 0x00000000 },
228		{ 0x0050, 0x00000009 },
229		{ 0x0054, 0x000a0009 },
230		{ 0x0058, 0x00000021 },
231		{ 0x005c, 0x00000018 },
232		{ 0x0060, 0x00000005 },
233		{ 0x0064, 0x0000001b },
234		{ 0x0068, 0x00000007 },
235		{ 0x006c, 0x0000000a },
236		{ 0x0070, 0x00000009 },
237		{ 0x0074, 0x00000010 },
238		{ 0x0078, 0x000000ae },
239		{ 0x007c, 0x00140005 },
240		{ 0x0080, 0x00050004 },
241		{ 0x0084, 0x50213005 },
242		{ 0x0088, 0x000c0000 },
243		{ 0x008c, 0x00000200 },
244		{ 0x0090, 0x00000040 },
245		{ 0x0100, 0x00000001 },
246		{ 0x00c0, 0x00020001 },
247		{ 0x00c8, 0x20082008 },
248		{ 0x0380, 0x00020003 },
249		{ 0x0390, 0x0000001f },
250	};
251
252	static const struct reg_config dbsc_config5[] = {
253		{ 0x0244, 0x00000011 },
254		{ 0x0290, 0x00000003 },
255		{ 0x02a0, 0x0300c4e1 },
256		{ 0x0290, 0x00000023 },
257		{ 0x02a0, 0x00fcb6d0 },
258		{ 0x0290, 0x00000011 },
259		{ 0x02a0, 0x1000040b },
260		{ 0x0290, 0x00000012 },
261		{ 0x02a0, 0x85589955 },
262		{ 0x0290, 0x00000013 },
263		{ 0x02a0, 0x1a852400 },
264		{ 0x0290, 0x00000014 },
265		{ 0x02a0, 0x300210b4 },
266		{ 0x0290, 0x00000015 },
267		{ 0x02a0, 0x00000b50 },
268		{ 0x0290, 0x00000016 },
269		{ 0x02a0, 0x00000006 },
270		{ 0x0290, 0x00000017 },
271		{ 0x02a0, 0x00000010 },
272		{ 0x0290, 0x0000001a },
273		{ 0x02a0, 0x910035c7 },
274		{ 0x0290, 0x00000004 },
275	};
276
277	static const struct reg_config dbsc_config6[] = {
278		{ 0x0290, 0x00000001 },
279		{ 0x02a0, 0x00000181 },
280		{ 0x0018, 0x11000000 },
281		{ 0x0290, 0x00000004 },
282	};
283
284	static const struct reg_config dbsc_config7[] = {
285		{ 0x0290, 0x00000001 },
286		{ 0x02a0, 0x0000fe01 },
287		{ 0x0304, 0x00000000 },
288		{ 0x00f4, 0x01004c20 },
289		{ 0x00f8, 0x014000aa },
290		{ 0x00e0, 0x00000140 },
291		{ 0x00e4, 0x00081450 },
292		{ 0x00e8, 0x00010000 },
293		{ 0x0290, 0x00000004 },
294	};
295
296	static const struct reg_config dbsc_config8[] = {
297		{ 0x0014, 0x00000001 },
298		{ 0x0010, 0x00000001 },
299		{ 0x0280, 0x00000000 },
300	};
301
302	static const u32 dbsc3_0_base = DBSC3_0_BASE;
303	unsigned int i;
304
305	for (i = 0; i < ARRAY_SIZE(dbsc_config1); i++)
306		writel(dbsc_config1[i].val, dbsc3_0_base | dbsc_config1[i].off);
307
308	dbsc_wait(0x2a0);
309
310	for (i = 0; i < ARRAY_SIZE(dbsc_config2); i++)
311		writel(dbsc_config2[i].val, dbsc3_0_base | dbsc_config2[i].off);
312
313	for (i = 0; i < ARRAY_SIZE(dbsc_config4); i++)
314		writel(dbsc_config4[i].val, dbsc3_0_base | dbsc_config4[i].off);
315
316	dbsc_wait(0x240);
317
318	for (i = 0; i < ARRAY_SIZE(dbsc_config5); i++)
319		writel(dbsc_config5[i].val, dbsc3_0_base | dbsc_config5[i].off);
320
321	dbsc_wait(0x2a0);
322
323	for (i = 0; i < ARRAY_SIZE(dbsc_config6); i++)
324		writel(dbsc_config6[i].val, dbsc3_0_base | dbsc_config6[i].off);
325
326	dbsc_wait(0x2a0);
327
328	for (i = 0; i < ARRAY_SIZE(dbsc_config7); i++)
329		writel(dbsc_config7[i].val, dbsc3_0_base | dbsc_config7[i].off);
330
331	dbsc_wait(0x2a0);
332
333	for (i = 0; i < ARRAY_SIZE(dbsc_config8); i++)
334		writel(dbsc_config8[i].val, dbsc3_0_base | dbsc_config8[i].off);
335
336}
337
338static void spl_init_qspi(void)
339{
340	mstp_clrbits_le32(MSTPSR9, SMSTPCR9, QSPI_MSTP917);
341
342	static const u32 qspi_base = 0xe6b10000;
343
344	writeb(0x08, qspi_base + 0x00);
345	writeb(0x00, qspi_base + 0x01);
346	writeb(0x06, qspi_base + 0x02);
347	writeb(0x01, qspi_base + 0x0a);
348	writeb(0x00, qspi_base + 0x0b);
349	writeb(0x00, qspi_base + 0x0c);
350	writeb(0x00, qspi_base + 0x0d);
351	writeb(0x00, qspi_base + 0x0e);
352
353	writew(0xe080, qspi_base + 0x10);
354
355	writeb(0xc0, qspi_base + 0x18);
356	writeb(0x00, qspi_base + 0x18);
357	writeb(0x00, qspi_base + 0x08);
358	writeb(0x48, qspi_base + 0x00);
359}
360
361void board_init_f(ulong dummy)
362{
363	mstp_clrbits_le32(MSTPSR1, SMSTPCR1, TMU0_MSTP125);
364	mstp_clrbits_le32(MSTPSR7, SMSTPCR7, SCIF2_MSTP719);
365
366	/* Set SD1 to the 97.5MHz */
367	writel(SD_97500KHZ, SD1CKCR);
368
369	spl_init_sys();
370	spl_init_pfc();
371	spl_init_gpio();
372	spl_init_lbsc();
373	spl_init_dbsc();
374	spl_init_qspi();
375}
376
377void spl_board_init(void)
378{
379	/* UART clocks enabled and gd valid - init serial console */
380	preloader_console_init();
381}
382
383void board_boot_order(u32 *spl_boot_list)
384{
385	const u32 jtag_magic = 0x1337c0de;
386	const u32 load_magic = 0xb33fc0de;
387
388	/*
389	 * If JTAG probe sets special word at 0xe6300020, then it must
390	 * put U-Boot into RAM and SPL will start it from RAM.
391	 */
392	if (readl(CONFIG_SPL_TEXT_BASE + 0x20) == jtag_magic) {
393		printf("JTAG boot detected!\n");
394
395		while (readl(CONFIG_SPL_TEXT_BASE + 0x24) != load_magic)
396			;
397
398		spl_boot_list[0] = BOOT_DEVICE_RAM;
399		spl_boot_list[1] = BOOT_DEVICE_NONE;
400
401		return;
402	}
403
404	/* Boot from SPI NOR with YMODEM UART fallback. */
405	spl_boot_list[0] = BOOT_DEVICE_SPI;
406	spl_boot_list[1] = BOOT_DEVICE_UART;
407	spl_boot_list[2] = BOOT_DEVICE_NONE;
408}
409
410void reset_cpu(void)
411{
412}
413