1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2009
4 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
5 */
6
7 #include <common.h>
8 #include <command.h>
9 #include <cpu_func.h>
10 #include <env.h>
11 #include <i2c.h>
12 #include <net.h>
13 #include <linux/mtd/st_smi.h>
14 #include <asm/io.h>
15 #include <asm/arch/hardware.h>
16 #include <asm/arch/spr_emi.h>
17 #include <asm/arch/spr_defs.h>
18
19 #define CPU 0
20 #define DDR 1
21 #define SRAM_REL 0xD2801000
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 #if defined(CONFIG_CMD_NET)
26 static int i2c_read_mac(uchar *buffer);
27 #endif
28
dram_init(void)29 int dram_init(void)
30 {
31 /* Store complete RAM size and return */
32 gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
33
34 return 0;
35 }
36
dram_init_banksize(void)37 int dram_init_banksize(void)
38 {
39 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
40 gd->bd->bi_dram[0].size = gd->ram_size;
41
42 return 0;
43 }
44
board_early_init_f()45 int board_early_init_f()
46 {
47 #if defined(CONFIG_ST_SMI)
48 smi_init();
49 #endif
50 return 0;
51 }
misc_init_r(void)52 int misc_init_r(void)
53 {
54 #if defined(CONFIG_CMD_NET)
55 uchar mac_id[6];
56
57 if (!eth_env_get_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
58 eth_env_set_enetaddr("ethaddr", mac_id);
59 #endif
60 env_set("verify", "n");
61
62 #if defined(CONFIG_SPEAR_USBTTY)
63 env_set("stdin", "usbtty");
64 env_set("stdout", "usbtty");
65 env_set("stderr", "usbtty");
66
67 #ifndef CONFIG_SYS_NO_DCACHE
68 dcache_enable();
69 #endif
70 #endif
71 return 0;
72 }
73
74 #ifdef CONFIG_SPEAR_EMI
75 struct cust_emi_para {
76 unsigned int tap;
77 unsigned int tsdp;
78 unsigned int tdpw;
79 unsigned int tdpr;
80 unsigned int tdcs;
81 };
82
83 /* EMI timing setting of m28w640hc of linux kernel */
84 const struct cust_emi_para emi_timing_m28w640hc = {
85 .tap = 0x10,
86 .tsdp = 0x05,
87 .tdpw = 0x0a,
88 .tdpr = 0x0a,
89 .tdcs = 0x05,
90 };
91
92 /* EMI timing setting of bootrom */
93 const struct cust_emi_para emi_timing_bootrom = {
94 .tap = 0xf,
95 .tsdp = 0x0,
96 .tdpw = 0xff,
97 .tdpr = 0x111,
98 .tdcs = 0x02,
99 };
100
spear_emi_init(void)101 void spear_emi_init(void)
102 {
103 const struct cust_emi_para *p = &emi_timing_m28w640hc;
104 struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
105 unsigned int cs;
106 unsigned int val, tmp;
107
108 val = readl(CONFIG_SPEAR_RASBASE);
109
110 if (val & EMI_ACKMSK)
111 tmp = 0x3f;
112 else
113 tmp = 0x0;
114
115 writel(tmp, &emi_regs_p->ack);
116
117 for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
118 writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
119 writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
120 writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
121 writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
122 writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
123 writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
124 &emi_regs_p->bank_regs[cs].control);
125 }
126 }
127 #endif
128
spear_board_init(ulong mach_type)129 int spear_board_init(ulong mach_type)
130 {
131 gd->bd->bi_arch_number = mach_type;
132
133 /* adress of boot parameters */
134 gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
135
136 #ifdef CONFIG_SPEAR_EMI
137 spear_emi_init();
138 #endif
139 return 0;
140 }
141
142 #if defined(CONFIG_CMD_NET)
i2c_read_mac(uchar * buffer)143 static int i2c_read_mac(uchar *buffer)
144 {
145 u8 buf[2];
146
147 i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
148
149 /* Check if mac in i2c memory is valid */
150 if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
151 /* Valid mac address is saved in i2c eeprom */
152 i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
153 return 0;
154 }
155
156 return -1;
157 }
158
write_mac(uchar * mac)159 static int write_mac(uchar *mac)
160 {
161 u8 buf[2];
162
163 buf[0] = (u8)MAGIC_BYTE0;
164 buf[1] = (u8)MAGIC_BYTE1;
165 i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
166
167 buf[0] = (u8)~MAGIC_BYTE0;
168 buf[1] = (u8)~MAGIC_BYTE1;
169
170 i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
171
172 /* check if valid MAC address is saved in I2C EEPROM or not? */
173 if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
174 i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
175 puts("I2C EEPROM written with mac address \n");
176 return 0;
177 }
178
179 puts("I2C EEPROM writing failed\n");
180 return -1;
181 }
182 #endif
183
do_chip_config(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])184 int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
185 {
186 void (*sram_setfreq) (unsigned int, unsigned int);
187 unsigned int frequency;
188 #if defined(CONFIG_CMD_NET)
189 unsigned char mac[6];
190 #endif
191
192 if ((argc > 3) || (argc < 2))
193 return cmd_usage(cmdtp);
194
195 if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
196
197 frequency = simple_strtoul(argv[2], NULL, 0);
198
199 if (frequency > 333) {
200 printf("Frequency is limited to 333MHz\n");
201 return 1;
202 }
203
204 sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
205
206 if (!strcmp(argv[1], "cpufreq")) {
207 sram_setfreq(CPU, frequency);
208 printf("CPU frequency changed to %u\n", frequency);
209 } else {
210 sram_setfreq(DDR, frequency);
211 printf("DDR frequency changed to %u\n", frequency);
212 }
213
214 return 0;
215
216 #if defined(CONFIG_CMD_NET)
217 } else if (!strcmp(argv[1], "ethaddr")) {
218
219 u32 reg;
220 char *e, *s = argv[2];
221 for (reg = 0; reg < 6; ++reg) {
222 mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
223 if (s)
224 s = (*e) ? e + 1 : e;
225 }
226 write_mac(mac);
227
228 return 0;
229 #endif
230 } else if (!strcmp(argv[1], "print")) {
231 #if defined(CONFIG_CMD_NET)
232 if (!i2c_read_mac(mac)) {
233 printf("Ethaddr (from i2c mem) = %pM\n", mac);
234 } else {
235 printf("Ethaddr (from i2c mem) = Not set\n");
236 }
237 #endif
238 return 0;
239 }
240
241 return cmd_usage(cmdtp);
242 }
243
244 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
245 "configure chip",
246 "chip_config cpufreq/ddrfreq frequency\n"
247 #if defined(CONFIG_CMD_NET)
248 "chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
249 #endif
250 "chip_config print");
251