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 <init.h>
13 #include <net.h>
14 #include <asm/global_data.h>
15 #include <linux/mtd/st_smi.h>
16 #include <asm/io.h>
17 #include <asm/arch/hardware.h>
18 #include <asm/arch/spr_emi.h>
19 #include <asm/arch/spr_defs.h>
20
21 #define CPU 0
22 #define DDR 1
23 #define SRAM_REL 0xD2801000
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 #if defined(CONFIG_CMD_NET)
28 static int i2c_read_mac(uchar *buffer);
29 #endif
30
dram_init(void)31 int dram_init(void)
32 {
33 /* Store complete RAM size and return */
34 gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
35
36 return 0;
37 }
38
dram_init_banksize(void)39 int dram_init_banksize(void)
40 {
41 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
42 gd->bd->bi_dram[0].size = gd->ram_size;
43
44 return 0;
45 }
46
board_early_init_f()47 int board_early_init_f()
48 {
49 #if defined(CONFIG_ST_SMI)
50 smi_init();
51 #endif
52 return 0;
53 }
misc_init_r(void)54 int misc_init_r(void)
55 {
56 #if defined(CONFIG_CMD_NET)
57 uchar mac_id[6];
58
59 if (!eth_env_get_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
60 eth_env_set_enetaddr("ethaddr", mac_id);
61 #endif
62 env_set("verify", "n");
63
64 #if defined(CONFIG_SPEAR_USBTTY)
65 env_set("stdin", "usbtty");
66 env_set("stdout", "usbtty");
67 env_set("stderr", "usbtty");
68
69 #ifndef CONFIG_SYS_NO_DCACHE
70 dcache_enable();
71 #endif
72 #endif
73 return 0;
74 }
75
76 #ifdef CONFIG_SPEAR_EMI
77 struct cust_emi_para {
78 unsigned int tap;
79 unsigned int tsdp;
80 unsigned int tdpw;
81 unsigned int tdpr;
82 unsigned int tdcs;
83 };
84
85 /* EMI timing setting of m28w640hc of linux kernel */
86 const struct cust_emi_para emi_timing_m28w640hc = {
87 .tap = 0x10,
88 .tsdp = 0x05,
89 .tdpw = 0x0a,
90 .tdpr = 0x0a,
91 .tdcs = 0x05,
92 };
93
94 /* EMI timing setting of bootrom */
95 const struct cust_emi_para emi_timing_bootrom = {
96 .tap = 0xf,
97 .tsdp = 0x0,
98 .tdpw = 0xff,
99 .tdpr = 0x111,
100 .tdcs = 0x02,
101 };
102
spear_emi_init(void)103 void spear_emi_init(void)
104 {
105 const struct cust_emi_para *p = &emi_timing_m28w640hc;
106 struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
107 unsigned int cs;
108 unsigned int val, tmp;
109
110 val = readl(CONFIG_SPEAR_RASBASE);
111
112 if (val & EMI_ACKMSK)
113 tmp = 0x3f;
114 else
115 tmp = 0x0;
116
117 writel(tmp, &emi_regs_p->ack);
118
119 for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
120 writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
121 writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
122 writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
123 writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
124 writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
125 writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
126 &emi_regs_p->bank_regs[cs].control);
127 }
128 }
129 #endif
130
spear_board_init(ulong mach_type)131 int spear_board_init(ulong mach_type)
132 {
133 gd->bd->bi_arch_number = mach_type;
134
135 /* adress of boot parameters */
136 gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
137
138 #ifdef CONFIG_SPEAR_EMI
139 spear_emi_init();
140 #endif
141 return 0;
142 }
143
144 #if defined(CONFIG_CMD_NET)
i2c_read_mac(uchar * buffer)145 static int i2c_read_mac(uchar *buffer)
146 {
147 u8 buf[2];
148
149 i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
150
151 /* Check if mac in i2c memory is valid */
152 if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
153 /* Valid mac address is saved in i2c eeprom */
154 i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
155 return 0;
156 }
157
158 return -1;
159 }
160
write_mac(uchar * mac)161 static int write_mac(uchar *mac)
162 {
163 u8 buf[2];
164
165 buf[0] = (u8)MAGIC_BYTE0;
166 buf[1] = (u8)MAGIC_BYTE1;
167 i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
168
169 buf[0] = (u8)~MAGIC_BYTE0;
170 buf[1] = (u8)~MAGIC_BYTE1;
171
172 i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
173
174 /* check if valid MAC address is saved in I2C EEPROM or not? */
175 if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
176 i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
177 puts("I2C EEPROM written with mac address \n");
178 return 0;
179 }
180
181 puts("I2C EEPROM writing failed\n");
182 return -1;
183 }
184 #endif
185
do_chip_config(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])186 int do_chip_config(struct cmd_tbl *cmdtp, int flag, int argc,
187 char *const argv[])
188 {
189 void (*sram_setfreq) (unsigned int, unsigned int);
190 unsigned int frequency;
191 #if defined(CONFIG_CMD_NET)
192 unsigned char mac[6];
193 #endif
194
195 if ((argc > 3) || (argc < 2))
196 return cmd_usage(cmdtp);
197
198 if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
199
200 frequency = simple_strtoul(argv[2], NULL, 0);
201
202 if (frequency > 333) {
203 printf("Frequency is limited to 333MHz\n");
204 return 1;
205 }
206
207 sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
208
209 if (!strcmp(argv[1], "cpufreq")) {
210 sram_setfreq(CPU, frequency);
211 printf("CPU frequency changed to %u\n", frequency);
212 } else {
213 sram_setfreq(DDR, frequency);
214 printf("DDR frequency changed to %u\n", frequency);
215 }
216
217 return 0;
218
219 #if defined(CONFIG_CMD_NET)
220 } else if (!strcmp(argv[1], "ethaddr")) {
221
222 u32 reg;
223 char *e, *s = argv[2];
224 for (reg = 0; reg < 6; ++reg) {
225 mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
226 if (s)
227 s = (*e) ? e + 1 : e;
228 }
229 write_mac(mac);
230
231 return 0;
232 #endif
233 } else if (!strcmp(argv[1], "print")) {
234 #if defined(CONFIG_CMD_NET)
235 if (!i2c_read_mac(mac)) {
236 printf("Ethaddr (from i2c mem) = %pM\n", mac);
237 } else {
238 printf("Ethaddr (from i2c mem) = Not set\n");
239 }
240 #endif
241 return 0;
242 }
243
244 return cmd_usage(cmdtp);
245 }
246
247 U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
248 "configure chip",
249 "chip_config cpufreq/ddrfreq frequency\n"
250 #if defined(CONFIG_CMD_NET)
251 "chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
252 #endif
253 "chip_config print");
254