1 /*
2  * Copyright (C) 2015-2017 Socionext Inc.
3  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <spl.h>
10 #include <linux/log2.h>
11 
12 #include "../init.h"
13 #include "../sbc/sbc-regs.h"
14 #include "../sg-regs.h"
15 #include "../soc-info.h"
16 #include "boot-device.h"
17 
18 struct uniphier_boot_device_info {
19 	unsigned int soc_id;
20 	unsigned int boot_device_sel_shift;
21 	const struct uniphier_boot_device *boot_device_table;
22 	const unsigned int *boot_device_count;
23 	int (*boot_device_is_usb)(u32 pinmon);
24 	unsigned int (*boot_device_fixup)(unsigned int mode);
25 	int have_internal_stm;
26 };
27 
28 static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
29 #if defined(CONFIG_ARCH_UNIPHIER_LD4)
30 	{
31 		.soc_id = UNIPHIER_LD4_ID,
32 		.boot_device_sel_shift = 1,
33 		.boot_device_table = uniphier_ld4_boot_device_table,
34 		.boot_device_count = &uniphier_ld4_boot_device_count,
35 		.have_internal_stm = 1,
36 	},
37 #endif
38 #if defined(CONFIG_ARCH_UNIPHIER_PRO4)
39 	{
40 		.soc_id = UNIPHIER_PRO4_ID,
41 		.boot_device_sel_shift = 1,
42 		.boot_device_table = uniphier_ld4_boot_device_table,
43 		.boot_device_count = &uniphier_ld4_boot_device_count,
44 		.have_internal_stm = 0,
45 	},
46 #endif
47 #if defined(CONFIG_ARCH_UNIPHIER_SLD8)
48 	{
49 		.soc_id = UNIPHIER_SLD8_ID,
50 		.boot_device_sel_shift = 1,
51 		.boot_device_table = uniphier_ld4_boot_device_table,
52 		.boot_device_count = &uniphier_ld4_boot_device_count,
53 		.have_internal_stm = 1,
54 	},
55 #endif
56 #if defined(CONFIG_ARCH_UNIPHIER_PRO5)
57 	{
58 		.soc_id = UNIPHIER_PRO5_ID,
59 		.boot_device_sel_shift = 1,
60 		.boot_device_table = uniphier_pro5_boot_device_table,
61 		.boot_device_count = &uniphier_pro5_boot_device_count,
62 		.have_internal_stm = 0,
63 	},
64 #endif
65 #if defined(CONFIG_ARCH_UNIPHIER_PXS2)
66 	{
67 		.soc_id = UNIPHIER_PXS2_ID,
68 		.boot_device_sel_shift = 1,
69 		.boot_device_table = uniphier_pxs2_boot_device_table,
70 		.boot_device_count = &uniphier_pxs2_boot_device_count,
71 		.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
72 		.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
73 		.have_internal_stm = 0,
74 	},
75 #endif
76 #if defined(CONFIG_ARCH_UNIPHIER_LD6B)
77 	{
78 		.soc_id = UNIPHIER_LD6B_ID,
79 		.boot_device_sel_shift = 1,
80 		.boot_device_table = uniphier_pxs2_boot_device_table,
81 		.boot_device_count = &uniphier_pxs2_boot_device_count,
82 		.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
83 		.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
84 		.have_internal_stm = 1,	/* STM on A-chip */
85 	},
86 #endif
87 #if defined(CONFIG_ARCH_UNIPHIER_LD11)
88 	{
89 		.soc_id = UNIPHIER_LD11_ID,
90 		.boot_device_sel_shift = 1,
91 		.boot_device_table = uniphier_ld11_boot_device_table,
92 		.boot_device_count = &uniphier_ld11_boot_device_count,
93 		.boot_device_is_usb = uniphier_ld11_boot_device_is_usb,
94 		.boot_device_fixup = uniphier_ld11_boot_device_fixup,
95 		.have_internal_stm = 1,
96 	},
97 #endif
98 #if defined(CONFIG_ARCH_UNIPHIER_LD20)
99 	{
100 		.soc_id = UNIPHIER_LD20_ID,
101 		.boot_device_sel_shift = 1,
102 		.boot_device_table = uniphier_ld11_boot_device_table,
103 		.boot_device_count = &uniphier_ld11_boot_device_count,
104 		.boot_device_is_usb = uniphier_ld20_boot_device_is_usb,
105 		.boot_device_fixup = uniphier_ld11_boot_device_fixup,
106 		.have_internal_stm = 1,
107 	},
108 #endif
109 #if defined(CONFIG_ARCH_UNIPHIER_PXS3)
110 	{
111 		.soc_id = UNIPHIER_PXS3_ID,
112 		.boot_device_sel_shift = 1,
113 		.boot_device_table = uniphier_pxs3_boot_device_table,
114 		.boot_device_count = &uniphier_pxs3_boot_device_count,
115 		.boot_device_is_usb = uniphier_pxs3_boot_device_is_usb,
116 		.have_internal_stm = 0,
117 	},
118 #endif
119 };
120 UNIPHIER_DEFINE_SOCDATA_FUNC(uniphier_get_boot_device_info,
121 			     uniphier_boot_device_info)
122 
123 static unsigned int __uniphier_boot_device_raw(
124 				const struct uniphier_boot_device_info *info)
125 {
126 	u32 pinmon;
127 	unsigned int boot_sel;
128 
129 	if (boot_is_swapped())
130 		return BOOT_DEVICE_NOR;
131 
132 	pinmon = readl(SG_PINMON0);
133 
134 	if (info->boot_device_is_usb && info->boot_device_is_usb(pinmon))
135 		return BOOT_DEVICE_USB;
136 
137 	boot_sel = pinmon >> info->boot_device_sel_shift;
138 
139 	BUG_ON(!is_power_of_2(*info->boot_device_count));
140 	boot_sel &= *info->boot_device_count - 1;
141 
142 	return info->boot_device_table[boot_sel].boot_device;
143 }
144 
145 unsigned int uniphier_boot_device_raw(void)
146 {
147 	const struct uniphier_boot_device_info *info;
148 
149 	info = uniphier_get_boot_device_info();
150 	if (!info) {
151 		pr_err("unsupported SoC\n");
152 		return BOOT_DEVICE_NONE;
153 	}
154 
155 	return __uniphier_boot_device_raw(info);
156 }
157 
158 u32 spl_boot_device(void)
159 {
160 	const struct uniphier_boot_device_info *info;
161 	u32 raw_mode;
162 
163 	info = uniphier_get_boot_device_info();
164 	if (!info) {
165 		pr_err("unsupported SoC\n");
166 		return BOOT_DEVICE_NONE;
167 	}
168 
169 	raw_mode = __uniphier_boot_device_raw(info);
170 
171 	return info->boot_device_fixup ?
172 				info->boot_device_fixup(raw_mode) : raw_mode;
173 }
174 
175 int uniphier_have_internal_stm(void)
176 {
177 	const struct uniphier_boot_device_info *info;
178 
179 	info = uniphier_get_boot_device_info();
180 	if (!info) {
181 		pr_err("unsupported SoC\n");
182 		return -ENOTSUPP;
183 	}
184 
185 	return info->have_internal_stm;
186 }
187 
188 int uniphier_boot_from_backend(void)
189 {
190 	return !!(readl(SG_PINMON0) & BIT(27));
191 }
192 
193 #ifndef CONFIG_SPL_BUILD
194 
195 static int do_pinmon(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
196 {
197 	const struct uniphier_boot_device_info *info;
198 	u32 pinmon;
199 	unsigned int boot_device_count, boot_sel;
200 	int i;
201 
202 	info = uniphier_get_boot_device_info();
203 	if (!info) {
204 		pr_err("unsupported SoC\n");
205 		return CMD_RET_FAILURE;
206 	}
207 
208 	if (uniphier_have_internal_stm())
209 		printf("STB Micon: %s\n",
210 		       uniphier_boot_from_backend() ? "OFF" : "ON");
211 
212 	printf("Boot Swap: %s\n", boot_is_swapped() ? "ON" : "OFF");
213 
214 	pinmon = readl(SG_PINMON0);
215 
216 	if (info->boot_device_is_usb)
217 		printf("USB Boot:  %s\n",
218 		       info->boot_device_is_usb(pinmon) ? "ON" : "OFF");
219 
220 	boot_device_count = *info->boot_device_count;
221 
222 	boot_sel = pinmon >> info->boot_device_sel_shift;
223 	boot_sel &= boot_device_count - 1;
224 
225 	printf("\nBoot Mode Sel:\n");
226 	for (i = 0; i < boot_device_count; i++)
227 		printf(" %c %02x %s\n", i == boot_sel ? '*' : ' ', i,
228 		       info->boot_device_table[i].desc);
229 
230 	return CMD_RET_SUCCESS;
231 }
232 
233 U_BOOT_CMD(
234 	pinmon,	1,	1,	do_pinmon,
235 	"pin monitor",
236 	""
237 );
238 
239 #endif /* !CONFIG_SPL_BUILD */
240