board/freescale/common: IDT8T49N222A configuration code

Add code for configuring IDT8T49N222A device for various output refclks
    - The IDT8T49N222A is a low phase noise Frequency Translator / Synthesizer with
      alarm and monitoring functions suitable for networking and
      communications applications. It is able to generate wide range of output
      frequencies.
    - In B4860QDS, it has been used to generate different refclks to SerDes modules
    - Programming of these devices are performed by I2C interface.

Signed-off-by: Shaveta Leekha <shaveta@freescale.com>
Acked-by: York Sun <yorksun@freescale.com>

1 files changed, 220 insertions, 0 deletions

diff --git a/board/freescale/common/idt8t49n222a_serdes_clk.c b/board/freescale/common/idt8t49n222a_serdes_clk.c
new file mode 100644
index 0000000..8798c87
--- /dev/null
+++ b/board/freescale/common/idt8t49n222a_serdes_clk.c
@@ -0,0 +1,220 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ * Author: Shaveta Leekha <shaveta@freescale.com>
+ *
+ * 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 "idt8t49n222a_serdes_clk.h"
+
+#define DEVICE_ID_REG		0x00
+
+static int check_pll_status(u8 idt_addr)
+{
+	u8 val = 0;
+	int ret;
+
+	ret = i2c_read(idt_addr, 0x17, 1, &val, 1);
+	if (ret < 0) {
+		printf("IDT:0x%x could not read status register from device.\n",
+			idt_addr);
+		return ret;
+	}
+
+	if (val & 0x04) {
+		debug("idt8t49n222a PLL is LOCKED: %x\n", val);
+	} else {
+		printf("idt8t49n222a PLL is not LOCKED: %x\n", val);
+		return -1;
+	}
+
+	return 0;
+}
+
+int set_serdes_refclk(u8 idt_addr, u8 serdes_num,
+			enum serdes_refclk refclk1,
+			enum serdes_refclk refclk2, u8 feedback)
+{
+	u8 dev_id = 0;
+	int i, ret;
+
+	debug("IDT:Configuring idt8t49n222a device at I2C address: 0x%2x\n",
+		idt_addr);
+
+	ret = i2c_read(idt_addr, DEVICE_ID_REG, 1, &dev_id, 1);
+	if (ret < 0) {
+		debug("IDT:0x%x could not read DEV_ID from device.\n",
+			idt_addr);
+		return ret;
+	}
+
+	if ((dev_id != 0x00) && (dev_id != 0x24) && (dev_id != 0x2a)) {
+		debug("IDT: device at address 0x%x is not idt8t49n222a.\n",
+			idt_addr);
+	}
+
+	if (serdes_num != 1 && serdes_num != 2) {
+		debug("serdes_num should be 1 for SerDes1 and"
+			" 2 for SerDes2.\n");
+		return -1;
+	}
+
+	if ((refclk1 == SERDES_REFCLK_122_88 && refclk2 != SERDES_REFCLK_122_88)
+		|| (refclk1 != SERDES_REFCLK_122_88
+			&& refclk2 == SERDES_REFCLK_122_88)) {
+		debug("Only one refclk at 122.88MHz is not supported."
+			" Please set both refclk1 & refclk2 to 122.88MHz"
+			" or both not to 122.88MHz.\n");
+		return -1;
+	}
+
+	if (refclk1 != SERDES_REFCLK_100 && refclk1 != SERDES_REFCLK_122_88
+					&& refclk1 != SERDES_REFCLK_125
+					&& refclk1 != SERDES_REFCLK_156_25) {
+		debug("refclk1 should be 100MHZ, 122.88MHz, 125MHz"
+			" or 156.25MHz.\n");
+		return -1;
+	}
+
+	if (refclk2 != SERDES_REFCLK_100 && refclk2 != SERDES_REFCLK_122_88
+					&& refclk2 != SERDES_REFCLK_125
+					&& refclk2 != SERDES_REFCLK_156_25) {
+		debug("refclk2 should be 100MHZ, 122.88MHz, 125MHz"
+			" or 156.25MHz.\n");
+		return -1;
+	}
+
+	if (feedback != 0 && feedback != 1) {
+		debug("valid values for feedback are 0(default) or 1.\n");
+		return -1;
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 122.88MHz  Refclk2 = 122.88MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_122_88 &&
+			refclk2 == SERDES_REFCLK_122_88) {
+		printf("Setting refclk1:122.88 and refclk2:122.88\n");
+		for (i = 0; i < NUM_IDT_REGS; i++)
+			i2c_reg_write(idt_addr, idt_conf_122_88[i][0],
+						idt_conf_122_88[i][1]);
+
+		if (feedback) {
+			for (i = 0; i < NUM_IDT_REGS_FEEDBACK; i++)
+				i2c_reg_write(idt_addr,
+					idt_conf_122_88_feedback[i][0],
+					idt_conf_122_88_feedback[i][1]);
+		}
+	}
+
+	if (refclk1 != SERDES_REFCLK_122_88 &&
+			refclk2 != SERDES_REFCLK_122_88) {
+		for (i = 0; i < NUM_IDT_REGS; i++)
+			i2c_reg_write(idt_addr, idt_conf_not_122_88[i][0],
+						idt_conf_not_122_88[i][1]);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 100MHz  Refclk2 = 125MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_100 && refclk2 == SERDES_REFCLK_125) {
+		printf("Setting refclk1:100 and refclk2:125\n");
+		i2c_reg_write(idt_addr, 0x11, 0x10);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 125MHz  Refclk2 = 125MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_125 && refclk2 == SERDES_REFCLK_125) {
+		printf("Setting refclk1:125 and refclk2:125\n");
+		i2c_reg_write(idt_addr, 0x10, 0x10);
+		i2c_reg_write(idt_addr, 0x11, 0x10);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 125MHz  Refclk2 = 100MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_125 && refclk2 == SERDES_REFCLK_100) {
+		printf("Setting refclk1:125 and refclk2:100\n");
+		i2c_reg_write(idt_addr, 0x10, 0x10);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 156.25MHz  Refclk2 = 156.25MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_156_25 &&
+			refclk2 == SERDES_REFCLK_156_25) {
+		printf("Setting refclk1:156.25 and refclk2:156.25\n");
+		for (i = 0; i < NUM_IDT_REGS_156_25; i++)
+			i2c_reg_write(idt_addr, idt_conf_156_25[i][0],
+						idt_conf_156_25[i][1]);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 100MHz  Refclk2 = 156.25MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_100 &&
+			refclk2 == SERDES_REFCLK_156_25) {
+		printf("Setting refclk1:100 and refclk2:156.25\n");
+		for (i = 0; i < NUM_IDT_REGS_156_25; i++)
+			i2c_reg_write(idt_addr, idt_conf_100_156_25[i][0],
+						idt_conf_100_156_25[i][1]);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 125MHz  Refclk2 = 156.25MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_125 &&
+			refclk2 == SERDES_REFCLK_156_25) {
+		printf("Setting refclk1:125 and refclk2:156.25\n");
+		for (i = 0; i < NUM_IDT_REGS_156_25; i++)
+			i2c_reg_write(idt_addr, idt_conf_125_156_25[i][0],
+						idt_conf_125_156_25[i][1]);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 156.25MHz  Refclk2 = 100MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_156_25 &&
+			refclk2 == SERDES_REFCLK_100) {
+		printf("Setting refclk1:156.25 and refclk2:100\n");
+		for (i = 0; i < NUM_IDT_REGS_156_25; i++)
+			i2c_reg_write(idt_addr, idt_conf_156_25_100[i][0],
+						idt_conf_156_25_100[i][1]);
+	}
+
+	/* Configuring IDT for output refclks as
+	 * Refclk1 = 156.25MHz  Refclk2 = 125MHz
+	 */
+	if (refclk1 == SERDES_REFCLK_156_25 &&
+			refclk2 == SERDES_REFCLK_125) {
+		printf("Setting refclk1:156.25 and refclk2:125\n");
+		for (i = 0; i < NUM_IDT_REGS_156_25; i++)
+			i2c_reg_write(idt_addr, idt_conf_156_25_125[i][0],
+						idt_conf_156_25_125[i][1]);
+	}
+
+	/* waiting for maximum of 1 second if PLL doesn'r get locked
+	 * initially. then check the status again.
+	 */
+	if (check_pll_status(idt_addr)) {
+		mdelay(1000);
+		if (check_pll_status(idt_addr))
+			return -1;
+	}
+
+	return 0;
+}