1 /*
2  * (C) Copyright 2009
3  * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <command.h>
10 #include <i2c.h>
11 #include <net.h>
12 #include <linux/mtd/st_smi.h>
13 #include <asm/io.h>
14 #include <asm/arch/hardware.h>
15 #include <asm/arch/spr_emi.h>
16 #include <asm/arch/spr_defs.h>
17 
18 #define CPU		0
19 #define DDR		1
20 #define SRAM_REL	0xD2801000
21 
22 DECLARE_GLOBAL_DATA_PTR;
23 
24 #if defined(CONFIG_CMD_NET)
25 static int i2c_read_mac(uchar *buffer);
26 #endif
27 
28 int dram_init(void)
29 {
30 	/* Store complete RAM size and return */
31 	gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
32 
33 	return 0;
34 }
35 
36 int dram_init_banksize(void)
37 {
38 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
39 	gd->bd->bi_dram[0].size = gd->ram_size;
40 
41 	return 0;
42 }
43 
44 int board_early_init_f()
45 {
46 #if defined(CONFIG_ST_SMI)
47 	smi_init();
48 #endif
49 	return 0;
50 }
51 int misc_init_r(void)
52 {
53 #if defined(CONFIG_CMD_NET)
54 	uchar mac_id[6];
55 
56 	if (!eth_env_get_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
57 		eth_env_set_enetaddr("ethaddr", mac_id);
58 #endif
59 	env_set("verify", "n");
60 
61 #if defined(CONFIG_SPEAR_USBTTY)
62 	env_set("stdin", "usbtty");
63 	env_set("stdout", "usbtty");
64 	env_set("stderr", "usbtty");
65 
66 #ifndef CONFIG_SYS_NO_DCACHE
67 	dcache_enable();
68 #endif
69 #endif
70 	return 0;
71 }
72 
73 #ifdef CONFIG_SPEAR_EMI
74 struct cust_emi_para {
75 	unsigned int tap;
76 	unsigned int tsdp;
77 	unsigned int tdpw;
78 	unsigned int tdpr;
79 	unsigned int tdcs;
80 };
81 
82 /* EMI timing setting of m28w640hc of linux kernel */
83 const struct cust_emi_para emi_timing_m28w640hc = {
84 	.tap = 0x10,
85 	.tsdp = 0x05,
86 	.tdpw = 0x0a,
87 	.tdpr = 0x0a,
88 	.tdcs = 0x05,
89 };
90 
91 /* EMI timing setting of bootrom */
92 const struct cust_emi_para emi_timing_bootrom = {
93 	.tap = 0xf,
94 	.tsdp = 0x0,
95 	.tdpw = 0xff,
96 	.tdpr = 0x111,
97 	.tdcs = 0x02,
98 };
99 
100 void spear_emi_init(void)
101 {
102 	const struct cust_emi_para *p = &emi_timing_m28w640hc;
103 	struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
104 	unsigned int cs;
105 	unsigned int val, tmp;
106 
107 	val = readl(CONFIG_SPEAR_RASBASE);
108 
109 	if (val & EMI_ACKMSK)
110 		tmp = 0x3f;
111 	else
112 		tmp = 0x0;
113 
114 	writel(tmp, &emi_regs_p->ack);
115 
116 	for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
117 		writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
118 		writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
119 		writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
120 		writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
121 		writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
122 		writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
123 		       &emi_regs_p->bank_regs[cs].control);
124 	}
125 }
126 #endif
127 
128 int spear_board_init(ulong mach_type)
129 {
130 	gd->bd->bi_arch_number = mach_type;
131 
132 	/* adress of boot parameters */
133 	gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
134 
135 #ifdef CONFIG_SPEAR_EMI
136 	spear_emi_init();
137 #endif
138 	return 0;
139 }
140 
141 #if defined(CONFIG_CMD_NET)
142 static int i2c_read_mac(uchar *buffer)
143 {
144 	u8 buf[2];
145 
146 	i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
147 
148 	/* Check if mac in i2c memory is valid */
149 	if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
150 		/* Valid mac address is saved in i2c eeprom */
151 		i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
152 		return 0;
153 	}
154 
155 	return -1;
156 }
157 
158 static int write_mac(uchar *mac)
159 {
160 	u8 buf[2];
161 
162 	buf[0] = (u8)MAGIC_BYTE0;
163 	buf[1] = (u8)MAGIC_BYTE1;
164 	i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
165 
166 	buf[0] = (u8)~MAGIC_BYTE0;
167 	buf[1] = (u8)~MAGIC_BYTE1;
168 
169 	i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
170 
171 	/* check if valid MAC address is saved in I2C EEPROM or not? */
172 	if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
173 		i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
174 		puts("I2C EEPROM written with mac address \n");
175 		return 0;
176 	}
177 
178 	puts("I2C EEPROM writing failed\n");
179 	return -1;
180 }
181 #endif
182 
183 int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
184 {
185 	void (*sram_setfreq) (unsigned int, unsigned int);
186 	unsigned int frequency;
187 #if defined(CONFIG_CMD_NET)
188 	unsigned char mac[6];
189 #endif
190 
191 	if ((argc > 3) || (argc < 2))
192 		return cmd_usage(cmdtp);
193 
194 	if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
195 
196 		frequency = simple_strtoul(argv[2], NULL, 0);
197 
198 		if (frequency > 333) {
199 			printf("Frequency is limited to 333MHz\n");
200 			return 1;
201 		}
202 
203 		sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
204 
205 		if (!strcmp(argv[1], "cpufreq")) {
206 			sram_setfreq(CPU, frequency);
207 			printf("CPU frequency changed to %u\n", frequency);
208 		} else {
209 			sram_setfreq(DDR, frequency);
210 			printf("DDR frequency changed to %u\n", frequency);
211 		}
212 
213 		return 0;
214 
215 #if defined(CONFIG_CMD_NET)
216 	} else if (!strcmp(argv[1], "ethaddr")) {
217 
218 		u32 reg;
219 		char *e, *s = argv[2];
220 		for (reg = 0; reg < 6; ++reg) {
221 			mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
222 			if (s)
223 				s = (*e) ? e + 1 : e;
224 		}
225 		write_mac(mac);
226 
227 		return 0;
228 #endif
229 	} else if (!strcmp(argv[1], "print")) {
230 #if defined(CONFIG_CMD_NET)
231 		if (!i2c_read_mac(mac)) {
232 			printf("Ethaddr (from i2c mem) = %pM\n", mac);
233 		} else {
234 			printf("Ethaddr (from i2c mem) = Not set\n");
235 		}
236 #endif
237 		return 0;
238 	}
239 
240 	return cmd_usage(cmdtp);
241 }
242 
243 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
244 	   "configure chip",
245 	   "chip_config cpufreq/ddrfreq frequency\n"
246 #if defined(CONFIG_CMD_NET)
247 	   "chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
248 #endif
249 	   "chip_config print");
250