mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-26 21:03:44 +09:00
83d290c56f
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>
367 lines
8.2 KiB
C
367 lines
8.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <div64.h>
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#include <asm/io.h>
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#include <errno.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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DECLARE_GLOBAL_DATA_PTR;
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int get_clocks(void)
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{
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#ifdef CONFIG_FSL_ESDHC
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#if CONFIG_SYS_FSL_ESDHC_ADDR == USDHC0_RBASE
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gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
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#elif CONFIG_SYS_FSL_ESDHC_ADDR == USDHC1_RBASE
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gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
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#endif
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#endif
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return 0;
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}
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static u32 get_fast_plat_clk(void)
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{
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return scg_clk_get_rate(SCG_NIC0_CLK);
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}
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static u32 get_slow_plat_clk(void)
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{
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return scg_clk_get_rate(SCG_NIC1_CLK);
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}
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static u32 get_ipg_clk(void)
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{
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return scg_clk_get_rate(SCG_NIC1_BUS_CLK);
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}
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u32 get_lpuart_clk(void)
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{
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int index = 0;
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const u32 lpuart_array[] = {
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LPUART0_RBASE,
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LPUART1_RBASE,
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LPUART2_RBASE,
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LPUART3_RBASE,
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LPUART4_RBASE,
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LPUART5_RBASE,
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LPUART6_RBASE,
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LPUART7_RBASE,
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};
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const enum pcc_clk lpuart_pcc_clks[] = {
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PER_CLK_LPUART4,
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PER_CLK_LPUART5,
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PER_CLK_LPUART6,
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PER_CLK_LPUART7,
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};
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for (index = 0; index < 8; index++) {
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if (lpuart_array[index] == LPUART_BASE)
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break;
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}
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if (index < 4 || index > 7)
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return 0;
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return pcc_clock_get_rate(lpuart_pcc_clks[index - 4]);
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}
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#ifdef CONFIG_SYS_LPI2C_IMX
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int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
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{
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/* Set parent to FIRC DIV2 clock */
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const enum pcc_clk lpi2c_pcc_clks[] = {
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PER_CLK_LPI2C4,
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PER_CLK_LPI2C5,
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PER_CLK_LPI2C6,
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PER_CLK_LPI2C7,
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};
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if (i2c_num < 4 || i2c_num > 7)
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return -EINVAL;
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if (enable) {
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false);
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pcc_clock_sel(lpi2c_pcc_clks[i2c_num - 4], SCG_FIRC_DIV2_CLK);
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], true);
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} else {
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pcc_clock_enable(lpi2c_pcc_clks[i2c_num - 4], false);
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}
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return 0;
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}
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u32 imx_get_i2cclk(unsigned i2c_num)
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{
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const enum pcc_clk lpi2c_pcc_clks[] = {
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PER_CLK_LPI2C4,
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PER_CLK_LPI2C5,
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PER_CLK_LPI2C6,
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PER_CLK_LPI2C7,
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};
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if (i2c_num < 4 || i2c_num > 7)
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return 0;
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return pcc_clock_get_rate(lpi2c_pcc_clks[i2c_num - 4]);
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}
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#endif
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unsigned int mxc_get_clock(enum mxc_clock clk)
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{
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switch (clk) {
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case MXC_ARM_CLK:
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return scg_clk_get_rate(SCG_CORE_CLK);
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case MXC_AXI_CLK:
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return get_fast_plat_clk();
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case MXC_AHB_CLK:
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return get_slow_plat_clk();
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case MXC_IPG_CLK:
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return get_ipg_clk();
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case MXC_I2C_CLK:
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return pcc_clock_get_rate(PER_CLK_LPI2C4);
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case MXC_UART_CLK:
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return get_lpuart_clk();
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case MXC_ESDHC_CLK:
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return pcc_clock_get_rate(PER_CLK_USDHC0);
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case MXC_ESDHC2_CLK:
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return pcc_clock_get_rate(PER_CLK_USDHC1);
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case MXC_DDR_CLK:
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return scg_clk_get_rate(SCG_DDR_CLK);
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default:
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printf("Unsupported mxc_clock %d\n", clk);
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break;
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}
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return 0;
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}
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void init_clk_usdhc(u32 index)
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{
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switch (index) {
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case 0:
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/*Disable the clock before configure it */
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pcc_clock_enable(PER_CLK_USDHC0, false);
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/* 158MHz / 1 = 158MHz */
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pcc_clock_sel(PER_CLK_USDHC0, SCG_NIC1_CLK);
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pcc_clock_div_config(PER_CLK_USDHC0, false, 1);
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pcc_clock_enable(PER_CLK_USDHC0, true);
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break;
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case 1:
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/*Disable the clock before configure it */
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pcc_clock_enable(PER_CLK_USDHC1, false);
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/* 158MHz / 1 = 158MHz */
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pcc_clock_sel(PER_CLK_USDHC1, SCG_NIC1_CLK);
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pcc_clock_div_config(PER_CLK_USDHC1, false, 1);
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pcc_clock_enable(PER_CLK_USDHC1, true);
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break;
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default:
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printf("Invalid index for USDHC %d\n", index);
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break;
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}
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}
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#ifdef CONFIG_MXC_OCOTP
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#define OCOTP_CTRL_PCC1_SLOT (38)
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#define OCOTP_CTRL_HIGH4K_PCC1_SLOT (39)
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void enable_ocotp_clk(unsigned char enable)
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{
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u32 val;
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/*
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* Seems the OCOTP CLOCKs have been enabled at default,
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* check its inuse flag
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*/
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val = readl(PCC1_RBASE + 4 * OCOTP_CTRL_PCC1_SLOT);
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if (!(val & PCC_INUSE_MASK))
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writel(PCC_CGC_MASK, (PCC1_RBASE + 4 * OCOTP_CTRL_PCC1_SLOT));
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val = readl(PCC1_RBASE + 4 * OCOTP_CTRL_HIGH4K_PCC1_SLOT);
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if (!(val & PCC_INUSE_MASK))
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writel(PCC_CGC_MASK,
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(PCC1_RBASE + 4 * OCOTP_CTRL_HIGH4K_PCC1_SLOT));
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}
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#endif
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void enable_usboh3_clk(unsigned char enable)
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{
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if (enable) {
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pcc_clock_enable(PER_CLK_USB0, false);
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pcc_clock_sel(PER_CLK_USB0, SCG_NIC1_BUS_CLK);
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pcc_clock_enable(PER_CLK_USB0, true);
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#ifdef CONFIG_USB_MAX_CONTROLLER_COUNT
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if (CONFIG_USB_MAX_CONTROLLER_COUNT > 1) {
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pcc_clock_enable(PER_CLK_USB1, false);
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pcc_clock_sel(PER_CLK_USB1, SCG_NIC1_BUS_CLK);
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pcc_clock_enable(PER_CLK_USB1, true);
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}
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#endif
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pcc_clock_enable(PER_CLK_USB_PHY, true);
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pcc_clock_enable(PER_CLK_USB_PL301, true);
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} else {
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pcc_clock_enable(PER_CLK_USB0, false);
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pcc_clock_enable(PER_CLK_USB1, false);
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pcc_clock_enable(PER_CLK_USB_PHY, false);
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pcc_clock_enable(PER_CLK_USB_PL301, false);
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}
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}
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static void lpuart_set_clk(uint32_t index, enum scg_clk clk)
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{
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const enum pcc_clk lpuart_pcc_clks[] = {
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PER_CLK_LPUART4,
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PER_CLK_LPUART5,
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PER_CLK_LPUART6,
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PER_CLK_LPUART7,
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};
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if (index < 4 || index > 7)
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return;
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#ifndef CONFIG_CLK_DEBUG
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pcc_clock_enable(lpuart_pcc_clks[index - 4], false);
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#endif
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pcc_clock_sel(lpuart_pcc_clks[index - 4], clk);
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pcc_clock_enable(lpuart_pcc_clks[index - 4], true);
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}
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static void init_clk_lpuart(void)
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{
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u32 index = 0, i;
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const u32 lpuart_array[] = {
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LPUART0_RBASE,
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LPUART1_RBASE,
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LPUART2_RBASE,
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LPUART3_RBASE,
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LPUART4_RBASE,
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LPUART5_RBASE,
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LPUART6_RBASE,
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LPUART7_RBASE,
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};
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for (i = 0; i < 8; i++) {
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if (lpuart_array[i] == LPUART_BASE) {
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index = i;
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break;
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}
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}
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lpuart_set_clk(index, SCG_SOSC_DIV2_CLK);
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}
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static void init_clk_rgpio2p(void)
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{
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/*Enable RGPIO2P1 clock */
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pcc_clock_enable(PER_CLK_RGPIO2P1, true);
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/*
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* Hard code to enable RGPIO2P0 clock since it is not
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* in clock frame for A7 domain
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*/
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writel(PCC_CGC_MASK, (PCC0_RBASE + 0x3C));
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}
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/* Configure PLL/PFD freq */
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void clock_init(void)
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{
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/*
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* ROM has enabled clocks:
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* A4 side: SIRC 16Mhz (DIV1-3 off), FIRC 48Mhz (DIV1-2 on),
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* Non-LP-boot: SOSC, SPLL PFD0 (scs selected)
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* A7 side: SPLL PFD0 (scs selected, 413Mhz),
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* APLL PFD0 (352Mhz), DDRCLK, all NIC clocks
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* A7 Plat0 (NIC0) = 176Mhz, Plat1 (NIC1) = 176Mhz,
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* IP BUS (NIC1_BUS) = 58.6Mhz
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*
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* In u-boot:
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* 1. Enable PFD1-3 of APLL for A7 side. Enable FIRC and DIVs.
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* 2. Enable USB PLL
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* 3. Init the clocks of peripherals used in u-boot bu
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* without set rate interface.The clocks for these
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* peripherals are enabled in this intialization.
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* 4.Other peripherals with set clock rate interface
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* does not be set in this function.
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*/
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scg_a7_firc_init();
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scg_a7_soscdiv_init();
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/* APLL PFD1 = 270Mhz, PFD2=480Mhz, PFD3=800Mhz */
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scg_enable_pll_pfd(SCG_APLL_PFD1_CLK, 35);
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scg_enable_pll_pfd(SCG_APLL_PFD2_CLK, 20);
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scg_enable_pll_pfd(SCG_APLL_PFD3_CLK, 12);
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init_clk_lpuart();
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init_clk_rgpio2p();
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enable_usboh3_clk(1);
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}
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#ifdef CONFIG_SECURE_BOOT
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void hab_caam_clock_enable(unsigned char enable)
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{
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if (enable)
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pcc_clock_enable(PER_CLK_CAAM, true);
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else
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pcc_clock_enable(PER_CLK_CAAM, false);
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}
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#endif
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#ifndef CONFIG_SPL_BUILD
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/*
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* Dump some core clockes.
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*/
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int do_mx7_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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u32 addr = 0;
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u32 freq;
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freq = decode_pll(PLL_A7_SPLL);
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printf("PLL_A7_SPLL %8d MHz\n", freq / 1000000);
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freq = decode_pll(PLL_A7_APLL);
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printf("PLL_A7_APLL %8d MHz\n", freq / 1000000);
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freq = decode_pll(PLL_USB);
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printf("PLL_USB %8d MHz\n", freq / 1000000);
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printf("\n");
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printf("CORE %8d kHz\n", scg_clk_get_rate(SCG_CORE_CLK) / 1000);
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printf("IPG %8d kHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000);
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printf("UART %8d kHz\n", mxc_get_clock(MXC_UART_CLK) / 1000);
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printf("AHB %8d kHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000);
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printf("AXI %8d kHz\n", mxc_get_clock(MXC_AXI_CLK) / 1000);
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printf("DDR %8d kHz\n", mxc_get_clock(MXC_DDR_CLK) / 1000);
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printf("USDHC1 %8d kHz\n", mxc_get_clock(MXC_ESDHC_CLK) / 1000);
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printf("USDHC2 %8d kHz\n", mxc_get_clock(MXC_ESDHC2_CLK) / 1000);
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printf("I2C4 %8d kHz\n", mxc_get_clock(MXC_I2C_CLK) / 1000);
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addr = (u32) clock_init;
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printf("[%s] addr = 0x%08X\r\n", __func__, addr);
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scg_a7_info();
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return 0;
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}
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U_BOOT_CMD(
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clocks, CONFIG_SYS_MAXARGS, 1, do_mx7_showclocks,
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"display clocks",
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""
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);
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#endif
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