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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
250 lines
5.2 KiB
C
250 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2009
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* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <i2c.h>
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#include <net.h>
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#include <linux/mtd/st_smi.h>
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#include <asm/io.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/spr_emi.h>
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#include <asm/arch/spr_defs.h>
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#define CPU 0
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#define DDR 1
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#define SRAM_REL 0xD2801000
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DECLARE_GLOBAL_DATA_PTR;
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#if defined(CONFIG_CMD_NET)
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static int i2c_read_mac(uchar *buffer);
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#endif
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int dram_init(void)
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{
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/* Store complete RAM size and return */
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gd->ram_size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_MAXSIZE);
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return 0;
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}
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int dram_init_banksize(void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[0].size = gd->ram_size;
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return 0;
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}
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int board_early_init_f()
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{
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#if defined(CONFIG_ST_SMI)
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smi_init();
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#endif
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return 0;
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}
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int misc_init_r(void)
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{
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#if defined(CONFIG_CMD_NET)
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uchar mac_id[6];
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if (!eth_env_get_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
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eth_env_set_enetaddr("ethaddr", mac_id);
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#endif
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env_set("verify", "n");
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#if defined(CONFIG_SPEAR_USBTTY)
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env_set("stdin", "usbtty");
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env_set("stdout", "usbtty");
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env_set("stderr", "usbtty");
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#ifndef CONFIG_SYS_NO_DCACHE
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dcache_enable();
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#endif
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#endif
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return 0;
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}
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#ifdef CONFIG_SPEAR_EMI
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struct cust_emi_para {
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unsigned int tap;
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unsigned int tsdp;
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unsigned int tdpw;
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unsigned int tdpr;
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unsigned int tdcs;
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};
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/* EMI timing setting of m28w640hc of linux kernel */
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const struct cust_emi_para emi_timing_m28w640hc = {
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.tap = 0x10,
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.tsdp = 0x05,
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.tdpw = 0x0a,
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.tdpr = 0x0a,
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.tdcs = 0x05,
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};
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/* EMI timing setting of bootrom */
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const struct cust_emi_para emi_timing_bootrom = {
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.tap = 0xf,
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.tsdp = 0x0,
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.tdpw = 0xff,
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.tdpr = 0x111,
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.tdcs = 0x02,
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};
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void spear_emi_init(void)
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{
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const struct cust_emi_para *p = &emi_timing_m28w640hc;
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struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
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unsigned int cs;
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unsigned int val, tmp;
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val = readl(CONFIG_SPEAR_RASBASE);
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if (val & EMI_ACKMSK)
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tmp = 0x3f;
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else
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tmp = 0x0;
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writel(tmp, &emi_regs_p->ack);
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for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
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writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
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writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
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writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
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writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
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writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
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writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
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&emi_regs_p->bank_regs[cs].control);
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}
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}
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#endif
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int spear_board_init(ulong mach_type)
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{
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gd->bd->bi_arch_number = mach_type;
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/* adress of boot parameters */
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gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
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#ifdef CONFIG_SPEAR_EMI
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spear_emi_init();
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#endif
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return 0;
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}
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#if defined(CONFIG_CMD_NET)
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static int i2c_read_mac(uchar *buffer)
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{
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u8 buf[2];
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i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
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/* Check if mac in i2c memory is valid */
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if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
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/* Valid mac address is saved in i2c eeprom */
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i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
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return 0;
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}
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return -1;
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}
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static int write_mac(uchar *mac)
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{
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u8 buf[2];
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buf[0] = (u8)MAGIC_BYTE0;
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buf[1] = (u8)MAGIC_BYTE1;
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i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
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buf[0] = (u8)~MAGIC_BYTE0;
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buf[1] = (u8)~MAGIC_BYTE1;
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i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
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/* check if valid MAC address is saved in I2C EEPROM or not? */
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if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
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i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
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puts("I2C EEPROM written with mac address \n");
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return 0;
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}
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puts("I2C EEPROM writing failed\n");
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return -1;
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}
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#endif
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int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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void (*sram_setfreq) (unsigned int, unsigned int);
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unsigned int frequency;
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#if defined(CONFIG_CMD_NET)
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unsigned char mac[6];
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#endif
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if ((argc > 3) || (argc < 2))
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return cmd_usage(cmdtp);
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if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
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frequency = simple_strtoul(argv[2], NULL, 0);
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if (frequency > 333) {
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printf("Frequency is limited to 333MHz\n");
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return 1;
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}
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sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
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if (!strcmp(argv[1], "cpufreq")) {
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sram_setfreq(CPU, frequency);
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printf("CPU frequency changed to %u\n", frequency);
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} else {
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sram_setfreq(DDR, frequency);
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printf("DDR frequency changed to %u\n", frequency);
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}
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return 0;
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#if defined(CONFIG_CMD_NET)
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} else if (!strcmp(argv[1], "ethaddr")) {
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u32 reg;
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char *e, *s = argv[2];
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for (reg = 0; reg < 6; ++reg) {
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mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
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if (s)
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s = (*e) ? e + 1 : e;
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}
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write_mac(mac);
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return 0;
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#endif
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} else if (!strcmp(argv[1], "print")) {
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#if defined(CONFIG_CMD_NET)
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if (!i2c_read_mac(mac)) {
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printf("Ethaddr (from i2c mem) = %pM\n", mac);
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} else {
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printf("Ethaddr (from i2c mem) = Not set\n");
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}
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#endif
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return 0;
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}
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return cmd_usage(cmdtp);
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}
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U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
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"configure chip",
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"chip_config cpufreq/ddrfreq frequency\n"
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#if defined(CONFIG_CMD_NET)
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"chip_config ethaddr XX:XX:XX:XX:XX:XX\n"
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#endif
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"chip_config print");
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