diff options
Diffstat (limited to 'board/freescale/common/idt8t49n222a_serdes_clk.c')
| -rw-r--r-- | board/freescale/common/idt8t49n222a_serdes_clk.c | 207 |
1 files changed, 207 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 0000000000..d347162277 --- /dev/null +++ b/board/freescale/common/idt8t49n222a_serdes_clk.c @@ -0,0 +1,207 @@ +/* + * Copyright 2013 Freescale Semiconductor, Inc. + * Author: Shaveta Leekha <shaveta@freescale.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#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; +} |
