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>

3 files changed, 341 insertions, 0 deletions

diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index d451f6f..457d1ad 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -54,6 +54,7 @@ COBJS-$(CONFIG_P4080DS)		+= ics307_clk.o
 COBJS-$(CONFIG_P5020DS)		+= ics307_clk.o
 COBJS-$(CONFIG_P5040DS)		+= ics307_clk.o
 COBJS-$(CONFIG_VSC_CROSSBAR)    += vsc3316_3308.o
+COBJS-$(CONFIG_IDT8T49N222A)	+= idt8t49n222a_serdes_clk.o
 
 # deal with common files for P-series corenet based devices
 SUBLIB-$(CONFIG_P2041RDB)	+= p_corenet/libp_corenet.o
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;
+}
diff --git a/board/freescale/common/idt8t49n222a_serdes_clk.h b/board/freescale/common/idt8t49n222a_serdes_clk.h
new file mode 100644
index 0000000..d7d64e7
--- /dev/null
+++ b/board/freescale/common/idt8t49n222a_serdes_clk.h
@@ -0,0 +1,120 @@
+/*
+ * 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
+ */
+
+#ifndef __IDT8T49N222A_SERDES_CLK_H_
+#define __IDT8T49N222A_SERDES_CLK_H_	1
+
+#include <common.h>
+#include <i2c.h>
+#include "qixis.h"
+#include "../b4860qds/b4860qds_qixis.h"
+#include <errno.h>
+
+#define NUM_IDT_REGS		23
+#define NUM_IDT_REGS_FEEDBACK	12
+#define NUM_IDT_REGS_156_25	11
+
+/* CLK */
+enum serdes_refclk {
+	SERDES_REFCLK_100,	/* refclk 100Mhz */
+	SERDES_REFCLK_122_88,	/* refclk 122.88Mhz */
+	SERDES_REFCLK_125,	/* refclk 125Mhz */
+	SERDES_REFCLK_156_25,	/* refclk 156.25Mhz */
+	SERDES_REFCLK_NONE = -1,
+};
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 = 122.88MHz Refclk2 = 122.88MHz
+ */
+static const u8 idt_conf_122_88[23][2] = { {0x00, 0x3C}, {0x01, 0x00},
+		{0x02, 0x9F}, {0x03, 0x00}, {0x04, 0x0B}, {0x05, 0x00},
+		{0x06, 0x00}, {0x07, 0x00}, {0x08, 0x7D}, {0x09, 0x00},
+		{0x0A, 0x08}, {0x0B, 0x00}, {0x0C, 0xDC}, {0x0D, 0x00},
+		{0x0E, 0x00}, {0x0F, 0x00}, {0x10, 0x12}, {0x11, 0x12},
+		{0x12, 0xB9}, {0x13, 0xBC}, {0x14, 0x40}, {0x15, 0x08},
+		{0x16, 0xA0} };
+
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 not equal to 122.88MHz Refclk2 not equal to 122.88MHz
+ */
+static const u8 idt_conf_not_122_88[23][2] = { {0x00, 0x00}, {0x01, 0x00},
+		{0x02, 0x00}, {0x03, 0x00}, {0x04, 0x0A}, {0x05, 0x00},
+		{0x06, 0x00}, {0x07, 0x00}, {0x08, 0x7D}, {0x09, 0x00},
+		{0x0A, 0x08}, {0x0B, 0x00}, {0x0C, 0xDC}, {0x0D, 0x00},
+		{0x0E, 0x00}, {0x0F, 0x00}, {0x10, 0x14}, {0x11, 0x14},
+		{0x12, 0x35}, {0x13, 0xBC}, {0x14, 0x40}, {0x15, 0x08},
+		{0x16, 0xA0} };
+
+/* Reconfiguration values for some of IDT registers for
+ * Output Refclks:
+ * Refclk1 = 122.88MHz Refclk2 = 122.88MHz
+ * and with feedback as 1
+ */
+static const u8 idt_conf_122_88_feedback[12][2] = { {0x00, 0x50}, {0x02, 0xD7},
+		{0x04, 0x89}, {0x06, 0xC3}, {0x08, 0xC0}, {0x0A, 0x07},
+		{0x0C, 0x80}, {0x10, 0x10}, {0x11, 0x10}, {0x12, 0x1B},
+		{0x14, 0x00}, {0x15, 0xE8} };
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 : 156.25MHz Refclk2 : 156.25MHz
+ */
+static const u8 idt_conf_156_25[11][2] = { {0x04, 0x19}, {0x06, 0x03},
+		{0x08, 0xC0}, {0x0A, 0x07}, {0x0C, 0xA1}, {0x0E, 0x20},
+		{0x10, 0x10}, {0x11, 0x10}, {0x12, 0xB5}, {0x13, 0x3C},
+		{0x15, 0xE8} };
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 : 100MHz Refclk2 : 156.25MHz
+ */
+static const u8 idt_conf_100_156_25[11][2] = { {0x04, 0x19}, {0x06, 0x03},
+		{0x08, 0xC0}, {0x0A, 0x07}, {0x0C, 0xA1}, {0x0E, 0x20},
+		{0x10, 0x19}, {0x11, 0x10}, {0x12, 0xB5}, {0x13, 0x3C},
+		{0x15, 0xE8} };
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 : 125MHz Refclk2 : 156.25MHz
+ */
+static const u8 idt_conf_125_156_25[11][2] = { {0x04, 0x19}, {0x06, 0x03},
+		{0x08, 0xC0}, {0x0A, 0x07}, {0x0C, 0xA1}, {0x0E, 0x20},
+		{0x10, 0x14}, {0x11, 0x10}, {0x12, 0xB5}, {0x13, 0x3C},
+		{0x15, 0xE8} };
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 : 156.25MHz Refclk2 : 100MHz
+ */
+static const u8 idt_conf_156_25_100[11][2] = { {0x04, 0x19}, {0x06, 0x03},
+		{0x08, 0xC0}, {0x0A, 0x07}, {0x0C, 0xA1}, {0x0E, 0x20},
+		{0x10, 0x10}, {0x11, 0x19}, {0x12, 0xB5}, {0x13, 0x3C},
+		{0x15, 0xE8} };
+
+/* configuration values for IDT registers for Output Refclks:
+ * Refclk1 : 156.25MHz Refclk2 : 125MHz
+ */
+static const u8 idt_conf_156_25_125[11][2] = { {0x04, 0x19}, {0x06, 0x03},
+		{0x08, 0xC0}, {0x0A, 0x07}, {0x0C, 0xA1}, {0x0E, 0x20},
+		{0x10, 0x10}, {0x11, 0x14}, {0x12, 0xB5}, {0x13, 0x3C},
+		{0x15, 0xE8} };
+
+int set_serdes_refclk(u8 idt_addr, u8 serdes_num,
+			enum serdes_refclk refclk1,
+			enum serdes_refclk refclk2, u8 feedback);
+
+#endif	/*__IDT8T49N222A_SERDES_CLK_H_ */