1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000-2009
4  * Viresh Kumar, ST Microelectronics, viresh.kumar@st.com
5  * Vipin Kumar, ST Microelectronics, vipin.kumar@st.com
6  */
7 
8 #include <common.h>
9 #include <asm/hardware.h>
10 #include <asm/io.h>
11 #include <asm/arch/spr_misc.h>
12 #include <asm/arch/spr_defs.h>
13 
14 void spear_late_init(void)
15 {
16 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
17 
18 	writel(0x80000007, &misc_p->arb_icm_ml1);
19 	writel(0x80000007, &misc_p->arb_icm_ml2);
20 	writel(0x80000007, &misc_p->arb_icm_ml3);
21 	writel(0x80000007, &misc_p->arb_icm_ml4);
22 	writel(0x80000007, &misc_p->arb_icm_ml5);
23 	writel(0x80000007, &misc_p->arb_icm_ml6);
24 	writel(0x80000007, &misc_p->arb_icm_ml7);
25 	writel(0x80000007, &misc_p->arb_icm_ml8);
26 	writel(0x80000007, &misc_p->arb_icm_ml9);
27 }
28 
29 static void sel_1v8(void)
30 {
31 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
32 	u32 ddr1v8, ddr2v5;
33 
34 	ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
35 	ddr2v5 &= 0x8080ffc0;
36 	ddr2v5 |= 0x78000003;
37 	writel(ddr2v5, &misc_p->ddr_2v5_compensation);
38 
39 	ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
40 	ddr1v8 &= 0x8080ffc0;
41 	ddr1v8 |= 0x78000010;
42 	writel(ddr1v8, &misc_p->ddr_1v8_compensation);
43 
44 	while (!(readl(&misc_p->ddr_1v8_compensation) & DDR_COMP_ACCURATE))
45 		;
46 }
47 
48 static void sel_2v5(void)
49 {
50 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
51 	u32 ddr1v8, ddr2v5;
52 
53 	ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
54 	ddr1v8 &= 0x8080ffc0;
55 	ddr1v8 |= 0x78000003;
56 	writel(ddr1v8, &misc_p->ddr_1v8_compensation);
57 
58 	ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
59 	ddr2v5 &= 0x8080ffc0;
60 	ddr2v5 |= 0x78000010;
61 	writel(ddr2v5, &misc_p->ddr_2v5_compensation);
62 
63 	while (!(readl(&misc_p->ddr_2v5_compensation) & DDR_COMP_ACCURATE))
64 		;
65 }
66 
67 /*
68  * plat_ddr_init:
69  */
70 void plat_ddr_init(void)
71 {
72 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
73 	u32 ddrpad;
74 	u32 core3v3, ddr1v8, ddr2v5;
75 
76 	/* DDR pad register configurations */
77 	ddrpad = readl(&misc_p->ddr_pad);
78 	ddrpad &= ~DDR_PAD_CNF_MSK;
79 
80 #if (CONFIG_DDR_HCLK)
81 	ddrpad |= 0xEAAB;
82 #elif (CONFIG_DDR_2HCLK)
83 	ddrpad |= 0xEAAD;
84 #elif (CONFIG_DDR_PLL2)
85 	ddrpad |= 0xEAAD;
86 #endif
87 	writel(ddrpad, &misc_p->ddr_pad);
88 
89 	/* Compensation register configurations */
90 	core3v3 = readl(&misc_p->core_3v3_compensation);
91 	core3v3 &= 0x8080ffe0;
92 	core3v3 |= 0x78000002;
93 	writel(core3v3, &misc_p->core_3v3_compensation);
94 
95 	ddr1v8 = readl(&misc_p->ddr_1v8_compensation);
96 	ddr1v8 &= 0x8080ffc0;
97 	ddr1v8 |= 0x78000004;
98 	writel(ddr1v8, &misc_p->ddr_1v8_compensation);
99 
100 	ddr2v5 = readl(&misc_p->ddr_2v5_compensation);
101 	ddr2v5 &= 0x8080ffc0;
102 	ddr2v5 |= 0x78000004;
103 	writel(ddr2v5, &misc_p->ddr_2v5_compensation);
104 
105 	if ((readl(&misc_p->ddr_pad) & DDR_PAD_SW_CONF) == DDR_PAD_SW_CONF) {
106 		/* Software memory configuration */
107 		if (readl(&misc_p->ddr_pad) & DDR_PAD_SSTL_SEL)
108 			sel_1v8();
109 		else
110 			sel_2v5();
111 	} else {
112 		/* Hardware memory configuration */
113 		if (readl(&misc_p->ddr_pad) & DDR_PAD_DRAM_TYPE)
114 			sel_1v8();
115 		else
116 			sel_2v5();
117 	}
118 }
119 
120 /*
121  * xxx_boot_selected:
122  *
123  * return true if the particular booting option is selected
124  * return false otherwise
125  */
126 static u32 read_bootstrap(void)
127 {
128 	return (readl(CONFIG_SPEAR_BOOTSTRAPCFG) >> CONFIG_SPEAR_BOOTSTRAPSHFT)
129 		& CONFIG_SPEAR_BOOTSTRAPMASK;
130 }
131 
132 int snor_boot_selected(void)
133 {
134 	u32 bootstrap = read_bootstrap();
135 
136 	if (SNOR_BOOT_SUPPORTED) {
137 		/* Check whether SNOR boot is selected */
138 		if ((bootstrap & CONFIG_SPEAR_ONLYSNORBOOT) ==
139 			CONFIG_SPEAR_ONLYSNORBOOT)
140 			return true;
141 
142 		if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
143 			CONFIG_SPEAR_NORNAND8BOOT)
144 			return true;
145 
146 		if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
147 			CONFIG_SPEAR_NORNAND16BOOT)
148 			return true;
149 	}
150 
151 	return false;
152 }
153 
154 int nand_boot_selected(void)
155 {
156 	u32 bootstrap = read_bootstrap();
157 
158 	if (NAND_BOOT_SUPPORTED) {
159 		/* Check whether NAND boot is selected */
160 		if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
161 			CONFIG_SPEAR_NORNAND8BOOT)
162 			return true;
163 
164 		if ((bootstrap & CONFIG_SPEAR_NORNANDBOOT) ==
165 			CONFIG_SPEAR_NORNAND16BOOT)
166 			return true;
167 	}
168 
169 	return false;
170 }
171 
172 int pnor_boot_selected(void)
173 {
174 	/* Parallel NOR boot is not selected in any SPEAr600 revision */
175 	return false;
176 }
177 
178 int usb_boot_selected(void)
179 {
180 	u32 bootstrap = read_bootstrap();
181 
182 	if (USB_BOOT_SUPPORTED) {
183 		/* Check whether USB boot is selected */
184 		if (!(bootstrap & CONFIG_SPEAR_USBBOOT))
185 			return true;
186 	}
187 
188 	return false;
189 }
190 
191 int tftp_boot_selected(void)
192 {
193 	/* TFTP boot is not selected in any SPEAr600 revision */
194 	return false;
195 }
196 
197 int uart_boot_selected(void)
198 {
199 	/* UART boot is not selected in any SPEAr600 revision */
200 	return false;
201 }
202 
203 int spi_boot_selected(void)
204 {
205 	/* SPI boot is not selected in any SPEAr600 revision */
206 	return false;
207 }
208 
209 int i2c_boot_selected(void)
210 {
211 	/* I2C boot is not selected in any SPEAr600 revision */
212 	return false;
213 }
214 
215 int mmc_boot_selected(void)
216 {
217 	return false;
218 }
219 
220 void plat_late_init(void)
221 {
222 	spear_late_init();
223 }
224