1 files changed, 296 insertions, 0 deletions
diff --git a/board/spear/common/spr_misc.c b/board/spear/common/spr_misc.c
new file mode 100755
index 0000000..e356912
--- /dev/null
+++ b/board/spear/common/spr_misc.c
@@ -0,0 +1,296 @@
+/*
+ * (C) Copyright 2009
+ * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <i2c.h>
+#include <net.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/spr_emi.h>
+#include <asm/arch/spr_xloader_table.h>
+#include <asm/arch/spr_defs.h>
+
+#define CPU		0
+#define DDR		1
+#define SRAM_REL	0xD2801000
+
+DECLARE_GLOBAL_DATA_PTR;
+static struct chip_data chip_data;
+
+int dram_init(void)
+{
+	struct xloader_table *xloader_tb =
+	    (struct xloader_table *)XLOADER_TABLE_ADDRESS;
+	struct xloader_table_1_1 *table_1_1;
+	struct xloader_table_1_2 *table_1_2;
+	struct chip_data *chip = &chip_data;
+
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = get_ram_size(PHYS_SDRAM_1,
+					       PHYS_SDRAM_1_MAXSIZE);
+
+	if (XLOADER_TABLE_VERSION_1_1 == xloader_tb->table_version) {
+		table_1_1 = &xloader_tb->table.table_1_1;
+		chip->dramfreq = table_1_1->ddrfreq;
+		chip->dramtype = table_1_1->ddrtype;
+
+	} else if (XLOADER_TABLE_VERSION_1_2 == xloader_tb->table_version) {
+		table_1_2 = &xloader_tb->table.table_1_2;
+		chip->dramfreq = table_1_2->ddrfreq;
+		chip->dramtype = table_1_2->ddrtype;
+	} else {
+		chip->dramfreq = -1;
+	}
+
+	return 0;
+}
+
+int misc_init_r(void)
+{
+#if defined(CONFIG_CMD_NET)
+	uchar mac_id[6];
+
+	if (!eth_getenv_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id))
+		eth_setenv_enetaddr("ethaddr", mac_id);
+#endif
+	setenv("verify", "n");
+
+#if defined(CONFIG_SPEAR_USBTTY)
+	setenv("stdin", "usbtty");
+	setenv("stdout", "usbtty");
+	setenv("stderr", "usbtty");
+#endif
+	return 0;
+}
+
+#ifdef CONFIG_SPEAR_EMI
+struct cust_emi_para {
+	unsigned int tap;
+	unsigned int tsdp;
+	unsigned int tdpw;
+	unsigned int tdpr;
+	unsigned int tdcs;
+};
+
+/* EMI timing setting of m28w640hc of linux kernel */
+const struct cust_emi_para emi_timing_m28w640hc = {
+	.tap = 0x10,
+	.tsdp = 0x05,
+	.tdpw = 0x0a,
+	.tdpr = 0x0a,
+	.tdcs = 0x05,
+};
+
+/* EMI timing setting of bootrom */
+const struct cust_emi_para emi_timing_bootrom = {
+	.tap = 0xf,
+	.tsdp = 0x0,
+	.tdpw = 0xff,
+	.tdpr = 0x111,
+	.tdcs = 0x02,
+};
+
+void spear_emi_init(void)
+{
+	const struct cust_emi_para *p = &emi_timing_m28w640hc;
+	struct emi_regs *emi_regs_p = (struct emi_regs *)CONFIG_SPEAR_EMIBASE;
+	unsigned int cs;
+	unsigned int val, tmp;
+
+	val = readl(CONFIG_SPEAR_RASBASE);
+
+	if (val & EMI_ACKMSK)
+		tmp = 0x3f;
+	else
+		tmp = 0x0;
+
+	writel(tmp, &emi_regs_p->ack);
+
+	for (cs = 0; cs < CONFIG_SYS_MAX_FLASH_BANKS; cs++) {
+		writel(p->tap, &emi_regs_p->bank_regs[cs].tap);
+		writel(p->tsdp, &emi_regs_p->bank_regs[cs].tsdp);
+		writel(p->tdpw, &emi_regs_p->bank_regs[cs].tdpw);
+		writel(p->tdpr, &emi_regs_p->bank_regs[cs].tdpr);
+		writel(p->tdcs, &emi_regs_p->bank_regs[cs].tdcs);
+		writel(EMI_CNTL_ENBBYTERW | ((val & 0x18) >> 3),
+		       &emi_regs_p->bank_regs[cs].control);
+	}
+}
+#endif
+
+int spear_board_init(ulong mach_type)
+{
+	struct xloader_table *xloader_tb =
+	    (struct xloader_table *)XLOADER_TABLE_ADDRESS;
+	struct xloader_table_1_2 *table_1_2;
+	struct chip_data *chip = &chip_data;
+
+	gd->bd->bi_arch_number = mach_type;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_ADDR;
+
+	/* CPU is initialized to work at 333MHz in Xloader */
+	chip->cpufreq = 333;
+
+	if (XLOADER_TABLE_VERSION_1_2 == xloader_tb->table_version) {
+		table_1_2 = &xloader_tb->table.table_1_2;
+		memcpy(chip->version, table_1_2->version,
+		       sizeof(chip->version));
+	}
+
+#ifdef CONFIG_SPEAR_EMI
+	spear_emi_init();
+#endif
+	return 0;
+}
+
+static int i2c_read_mac(uchar *buffer)
+{
+	u8 buf[2];
+
+	i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
+
+	/* Check if mac in i2c memory is valid */
+	if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
+		/* Valid mac address is saved in i2c eeprom */
+		i2c_read(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, buffer, MAC_LEN);
+		return 0;
+	}
+
+	return -1;
+}
+
+static int write_mac(uchar *mac)
+{
+	u8 buf[2];
+
+	buf[0] = (u8)MAGIC_BYTE0;
+	buf[1] = (u8)MAGIC_BYTE1;
+	i2c_write(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
+
+	buf[0] = (u8)~MAGIC_BYTE0;
+	buf[1] = (u8)~MAGIC_BYTE1;
+
+	i2c_read(CONFIG_I2C_CHIPADDRESS, MAGIC_OFF, 1, buf, MAGIC_LEN);
+
+	/* check if valid MAC address is saved in I2C EEPROM or not? */
+	if ((buf[0] == MAGIC_BYTE0) && (buf[1] == MAGIC_BYTE1)) {
+		i2c_write(CONFIG_I2C_CHIPADDRESS, MAC_OFF, 1, mac, MAC_LEN);
+		puts("I2C EEPROM written with mac address \n");
+		return 0;
+	}
+
+	puts("I2C EEPROM writing failed \n");
+	return -1;
+}
+
+int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	void (*sram_setfreq) (unsigned int, unsigned int);
+	struct chip_data *chip = &chip_data;
+	unsigned char mac[6];
+	unsigned int reg, frequency;
+	char *s, *e;
+	char i2c_mac[20];
+
+	if ((argc > 3) || (argc < 2)) {
+		cmd_usage(cmdtp);
+		return 1;
+	}
+
+	if ((!strcmp(argv[1], "cpufreq")) || (!strcmp(argv[1], "ddrfreq"))) {
+
+		frequency = simple_strtoul(argv[2], NULL, 0);
+
+		if (frequency > 333) {
+			printf("Frequency is limited to 333MHz\n");
+			return 1;
+		}
+
+		sram_setfreq = memcpy((void *)SRAM_REL, setfreq, setfreq_sz);
+
+		if (!strcmp(argv[1], "cpufreq")) {
+			sram_setfreq(CPU, frequency);
+			printf("CPU frequency changed to %u\n", frequency);
+
+			chip->cpufreq = frequency;
+		} else {
+			sram_setfreq(DDR, frequency);
+			printf("DDR frequency changed to %u\n", frequency);
+
+			chip->dramfreq = frequency;
+		}
+
+		return 0;
+	} else if (!strcmp(argv[1], "ethaddr")) {
+
+		s = argv[2];
+		for (reg = 0; reg < 6; ++reg) {
+			mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
+			if (s)
+				s = (*e) ? e + 1 : e;
+		}
+		write_mac(mac);
+
+		return 0;
+	} else if (!strcmp(argv[1], "print")) {
+
+		if (chip->cpufreq == -1)
+			printf("CPU Freq    = Not Known\n");
+		else
+			printf("CPU Freq    = %d MHz\n", chip->cpufreq);
+
+		if (chip->dramfreq == -1)
+			printf("DDR Freq    = Not Known\n");
+		else
+			printf("DDR Freq    = %d MHz\n", chip->dramfreq);
+
+		if (chip->dramtype == DDRMOBILE)
+			printf("DDR Type    = MOBILE\n");
+		else if (chip->dramtype == DDR2)
+			printf("DDR Type    = DDR2\n");
+		else
+			printf("DDR Type    = Not Known\n");
+
+		if (!i2c_read_mac(mac)) {
+			sprintf(i2c_mac, "%pM", mac);
+			printf("Ethaddr (from i2c mem) = %s\n", i2c_mac);
+		} else {
+			printf("Ethaddr (from i2c mem) = Not set\n");
+		}
+
+		printf("Xloader Rev = %s\n", chip->version);
+
+		return 0;
+	}
+
+	cmd_usage(cmdtp);
+	return 1;
+}
+
+U_BOOT_CMD(chip_config, 3, 1, do_chip_config,
+	   "configure chip",
+	   "chip_config cpufreq/ddrfreq frequency\n"
+	   "chip_config print");