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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>
207 lines
5.6 KiB
C
207 lines
5.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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* Author: Shaveta Leekha <shaveta@freescale.com>
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*/
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#include "idt8t49n222a_serdes_clk.h"
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#define DEVICE_ID_REG 0x00
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static int check_pll_status(u8 idt_addr)
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{
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u8 val = 0;
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int ret;
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ret = i2c_read(idt_addr, 0x17, 1, &val, 1);
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if (ret < 0) {
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printf("IDT:0x%x could not read status register from device.\n",
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idt_addr);
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return ret;
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}
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if (val & 0x04) {
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debug("idt8t49n222a PLL is LOCKED: %x\n", val);
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} else {
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printf("idt8t49n222a PLL is not LOCKED: %x\n", val);
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return -1;
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}
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return 0;
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}
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int set_serdes_refclk(u8 idt_addr, u8 serdes_num,
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enum serdes_refclk refclk1,
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enum serdes_refclk refclk2, u8 feedback)
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{
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u8 dev_id = 0;
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int i, ret;
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debug("IDT:Configuring idt8t49n222a device at I2C address: 0x%2x\n",
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idt_addr);
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ret = i2c_read(idt_addr, DEVICE_ID_REG, 1, &dev_id, 1);
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if (ret < 0) {
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debug("IDT:0x%x could not read DEV_ID from device.\n",
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idt_addr);
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return ret;
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}
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if ((dev_id != 0x00) && (dev_id != 0x24) && (dev_id != 0x2a)) {
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debug("IDT: device at address 0x%x is not idt8t49n222a.\n",
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idt_addr);
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}
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if (serdes_num != 1 && serdes_num != 2) {
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debug("serdes_num should be 1 for SerDes1 and"
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" 2 for SerDes2.\n");
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return -1;
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}
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if ((refclk1 == SERDES_REFCLK_122_88 && refclk2 != SERDES_REFCLK_122_88)
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|| (refclk1 != SERDES_REFCLK_122_88
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&& refclk2 == SERDES_REFCLK_122_88)) {
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debug("Only one refclk at 122.88MHz is not supported."
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" Please set both refclk1 & refclk2 to 122.88MHz"
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" or both not to 122.88MHz.\n");
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return -1;
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}
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if (refclk1 != SERDES_REFCLK_100 && refclk1 != SERDES_REFCLK_122_88
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&& refclk1 != SERDES_REFCLK_125
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&& refclk1 != SERDES_REFCLK_156_25) {
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debug("refclk1 should be 100MHZ, 122.88MHz, 125MHz"
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" or 156.25MHz.\n");
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return -1;
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}
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if (refclk2 != SERDES_REFCLK_100 && refclk2 != SERDES_REFCLK_122_88
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&& refclk2 != SERDES_REFCLK_125
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&& refclk2 != SERDES_REFCLK_156_25) {
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debug("refclk2 should be 100MHZ, 122.88MHz, 125MHz"
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" or 156.25MHz.\n");
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return -1;
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}
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if (feedback != 0 && feedback != 1) {
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debug("valid values for feedback are 0(default) or 1.\n");
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return -1;
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 122.88MHz Refclk2 = 122.88MHz
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*/
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if (refclk1 == SERDES_REFCLK_122_88 &&
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refclk2 == SERDES_REFCLK_122_88) {
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printf("Setting refclk1:122.88 and refclk2:122.88\n");
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for (i = 0; i < NUM_IDT_REGS; i++)
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i2c_reg_write(idt_addr, idt_conf_122_88[i][0],
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idt_conf_122_88[i][1]);
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if (feedback) {
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for (i = 0; i < NUM_IDT_REGS_FEEDBACK; i++)
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i2c_reg_write(idt_addr,
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idt_conf_122_88_feedback[i][0],
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idt_conf_122_88_feedback[i][1]);
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}
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}
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if (refclk1 != SERDES_REFCLK_122_88 &&
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refclk2 != SERDES_REFCLK_122_88) {
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for (i = 0; i < NUM_IDT_REGS; i++)
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i2c_reg_write(idt_addr, idt_conf_not_122_88[i][0],
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idt_conf_not_122_88[i][1]);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 100MHz Refclk2 = 125MHz
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*/
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if (refclk1 == SERDES_REFCLK_100 && refclk2 == SERDES_REFCLK_125) {
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printf("Setting refclk1:100 and refclk2:125\n");
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i2c_reg_write(idt_addr, 0x11, 0x10);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 125MHz Refclk2 = 125MHz
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*/
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if (refclk1 == SERDES_REFCLK_125 && refclk2 == SERDES_REFCLK_125) {
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printf("Setting refclk1:125 and refclk2:125\n");
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i2c_reg_write(idt_addr, 0x10, 0x10);
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i2c_reg_write(idt_addr, 0x11, 0x10);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 125MHz Refclk2 = 100MHz
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*/
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if (refclk1 == SERDES_REFCLK_125 && refclk2 == SERDES_REFCLK_100) {
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printf("Setting refclk1:125 and refclk2:100\n");
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i2c_reg_write(idt_addr, 0x10, 0x10);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 156.25MHz Refclk2 = 156.25MHz
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*/
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if (refclk1 == SERDES_REFCLK_156_25 &&
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refclk2 == SERDES_REFCLK_156_25) {
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printf("Setting refclk1:156.25 and refclk2:156.25\n");
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for (i = 0; i < NUM_IDT_REGS_156_25; i++)
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i2c_reg_write(idt_addr, idt_conf_156_25[i][0],
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idt_conf_156_25[i][1]);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 100MHz Refclk2 = 156.25MHz
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*/
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if (refclk1 == SERDES_REFCLK_100 &&
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refclk2 == SERDES_REFCLK_156_25) {
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printf("Setting refclk1:100 and refclk2:156.25\n");
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for (i = 0; i < NUM_IDT_REGS_156_25; i++)
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i2c_reg_write(idt_addr, idt_conf_100_156_25[i][0],
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idt_conf_100_156_25[i][1]);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 125MHz Refclk2 = 156.25MHz
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*/
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if (refclk1 == SERDES_REFCLK_125 &&
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refclk2 == SERDES_REFCLK_156_25) {
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printf("Setting refclk1:125 and refclk2:156.25\n");
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for (i = 0; i < NUM_IDT_REGS_156_25; i++)
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i2c_reg_write(idt_addr, idt_conf_125_156_25[i][0],
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idt_conf_125_156_25[i][1]);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 156.25MHz Refclk2 = 100MHz
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*/
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if (refclk1 == SERDES_REFCLK_156_25 &&
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refclk2 == SERDES_REFCLK_100) {
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printf("Setting refclk1:156.25 and refclk2:100\n");
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for (i = 0; i < NUM_IDT_REGS_156_25; i++)
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i2c_reg_write(idt_addr, idt_conf_156_25_100[i][0],
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idt_conf_156_25_100[i][1]);
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}
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/* Configuring IDT for output refclks as
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* Refclk1 = 156.25MHz Refclk2 = 125MHz
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*/
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if (refclk1 == SERDES_REFCLK_156_25 &&
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refclk2 == SERDES_REFCLK_125) {
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printf("Setting refclk1:156.25 and refclk2:125\n");
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for (i = 0; i < NUM_IDT_REGS_156_25; i++)
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i2c_reg_write(idt_addr, idt_conf_156_25_125[i][0],
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idt_conf_156_25_125[i][1]);
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}
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/* waiting for maximum of 1 second if PLL doesn'r get locked
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* initially. then check the status again.
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*/
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if (check_pll_status(idt_addr)) {
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mdelay(1000);
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if (check_pll_status(idt_addr))
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return -1;
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}
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return 0;
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}
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