diff options
Diffstat (limited to 'arch/arm/mach-imx/imx8m.c')
| -rw-r--r-- | arch/arm/mach-imx/imx8m.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m.c b/arch/arm/mach-imx/imx8m.c new file mode 100644 index 0000000000..52e42ee9ef --- /dev/null +++ b/arch/arm/mach-imx/imx8m.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <init.h> +#include <common.h> +#include <linux/sizes.h> +#include <io.h> +#include <asm/syscounter.h> +#include <asm/system.h> +#include <mach/imx/generic.h> +#include <mach/imx/imx8m-ccm-regs.h> +#include <soc/imx8m/clk-early.h> + +#include <linux/bitfield.h> +#include <linux/iopoll.h> + +#define IMX_SIP_BUILDINFO 0xC2000003 +#define IMX_SIP_BUILDINFO_GET_COMMITHASH 0x00 + +void imx8m_clock_set_target_val(int clock_id, u32 val) +{ + void __iomem *ccm = IOMEM(MX8M_CCM_BASE_ADDR); + + writel(val, ccm + IMX8M_CCM_TARGET_ROOTn(clock_id)); +} + +void imx8m_ccgr_clock_enable(int index) +{ + void __iomem *ccm = IOMEM(MX8M_CCM_BASE_ADDR); + + writel(IMX8M_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX8M_CCM_CCGRn_SET(index)); +} + +void imx8m_ccgr_clock_disable(int index) +{ + void __iomem *ccm = IOMEM(MX8M_CCM_BASE_ADDR); + + writel(IMX8M_CCM_CCGR_SETTINGn_NEEDED(0), + ccm + IMX8M_CCM_CCGRn_CLR(index)); +} + +#define INTPLL_DIV20_CLKE_MASK BIT(27) +#define INTPLL_DIV10_CLKE_MASK BIT(25) +#define INTPLL_DIV8_CLKE_MASK BIT(23) +#define INTPLL_DIV6_CLKE_MASK BIT(21) +#define INTPLL_DIV5_CLKE_MASK BIT(19) +#define INTPLL_DIV4_CLKE_MASK BIT(17) +#define INTPLL_DIV3_CLKE_MASK BIT(15) +#define INTPLL_DIV2_CLKE_MASK BIT(13) +#define INTPLL_CLKE_MASK BIT(11) + +#define CCM_TARGET_ROOT0_DIV GENMASK(1, 0) + +#define IMX8MM_CCM_ANALOG_ARM_PLL_GEN_CTRL 0x84 +#define IMX8MM_CCM_ANALOG_SYS_PLL1_GEN_CTRL 0x94 +#define IMX8MM_CCM_ANALOG_SYS_PLL2_GEN_CTRL 0x104 +#define IMX8MM_CCM_ANALOG_SYS_PLL3_GEN_CTRL 0x114 + +static void __imx8m_early_clock_init(unsigned long pll3_freq) /* and later */ +{ + void __iomem *ana = IOMEM(MX8M_ANATOP_BASE_ADDR); + void __iomem *ccm = IOMEM(MX8M_CCM_BASE_ADDR); + u32 val; + + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_DDR1); + + imx8m_clock_set_target_val(IMX8M_DRAM_ALT_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_CCM_TARGET_ROOTn_MUX(1)); + + /* change the clock source of dram_apb_clk_root: source 4 800MHz /4 = 200MHz */ + imx8m_clock_set_target_val(IMX8M_DRAM_APB_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_CCM_TARGET_ROOTn_MUX(4) | + IMX8M_CCM_TARGET_ROOTn_POST_DIV(4 - 1)); + + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_DDR1); + + val = readl(ana + IMX8MM_CCM_ANALOG_SYS_PLL1_GEN_CTRL); + val |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK | + INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK | + INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK | + INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK | + INTPLL_DIV20_CLKE_MASK; + writel(val, ana + IMX8MM_CCM_ANALOG_SYS_PLL1_GEN_CTRL); + + val = readl(ana + IMX8MM_CCM_ANALOG_SYS_PLL2_GEN_CTRL); + val |= INTPLL_CLKE_MASK | INTPLL_DIV2_CLKE_MASK | + INTPLL_DIV3_CLKE_MASK | INTPLL_DIV4_CLKE_MASK | + INTPLL_DIV5_CLKE_MASK | INTPLL_DIV6_CLKE_MASK | + INTPLL_DIV8_CLKE_MASK | INTPLL_DIV10_CLKE_MASK | + INTPLL_DIV20_CLKE_MASK; + writel(val, ana + IMX8MM_CCM_ANALOG_SYS_PLL2_GEN_CTRL); + + /* config GIC to sys_pll2_100m */ + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_GIC); + imx8m_clock_set_target_val(IMX8M_GIC_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_CCM_TARGET_ROOTn_MUX(3)); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_GIC); + + /* Configure SYS_PLL3 */ + clk_pll1416x_early_set_rate(ana + IMX8MM_CCM_ANALOG_SYS_PLL3_GEN_CTRL, + pll3_freq, 25000000UL); + + clrsetbits_le32(ccm + IMX8M_CCM_TARGET_ROOTn(IMX8M_ARM_A53_CLK_ROOT), + IMX8M_CCM_TARGET_ROOTn_MUX(7), + IMX8M_CCM_TARGET_ROOTn_MUX(2)); + + /* Configure ARM PLL to 1.2GHz */ + clk_pll1416x_early_set_rate(ana + IMX8MM_CCM_ANALOG_ARM_PLL_GEN_CTRL, + 1200000000UL, 25000000UL); + + clrsetbits_le32(ana + IMX8MM_CCM_ANALOG_ARM_PLL_GEN_CTRL, 0, + INTPLL_CLKE_MASK); + + clrsetbits_le32(ccm + IMX8M_CCM_TARGET_ROOTn(IMX8M_ARM_A53_CLK_ROOT), + IMX8M_CCM_TARGET_ROOTn_MUX(7), + IMX8M_CCM_TARGET_ROOTn_MUX(1)); + + /* Configure DIV to 1.2GHz */ + clrsetbits_le32(ccm + IMX8M_CCM_TARGET_ROOTn(IMX8M_ARM_A53_CLK_ROOT), + CCM_TARGET_ROOT0_DIV, + FIELD_PREP(CCM_TARGET_ROOT0_DIV, 0)); +} + +void imx8mm_early_clock_init(void) +{ + __imx8m_early_clock_init(750000000UL); +} + +void imx8mn_early_clock_init(void) +{ + __imx8m_early_clock_init(600000000UL); +} + +void imx8mp_early_clock_init(void) +{ + __imx8m_early_clock_init(750000000UL); +} + + +#define KEEP_ALIVE 0x18 +#define VER_L 0x1c +#define VER_H 0x20 +#define VER_LIB_L_ADDR 0x24 +#define VER_LIB_H_ADDR 0x28 +#define FW_ALIVE_TIMEOUT_US 100000 + +static int imx8mq_report_hdmi_firmware(void) +{ + void __iomem *hdmi = IOMEM(MX8MQ_HDMI_CTRL_BASE_ADDR); + u16 ver_lib, ver; + u32 reg; + int ret; + + if (!cpu_is_mx8mq()) + return 0; + + /* check the keep alive register to make sure fw working */ + ret = readl_poll_timeout(hdmi + KEEP_ALIVE, + reg, reg, FW_ALIVE_TIMEOUT_US); + if (ret < 0) { + pr_info("HDP firmware is not running\n"); + return 0; + } + + ver = readl(hdmi + VER_H) & 0xff; + ver <<= 8; + ver |= readl(hdmi + VER_L) & 0xff; + + ver_lib = readl(hdmi + VER_LIB_H_ADDR) & 0xff; + ver_lib <<= 8; + ver_lib |= readl(hdmi + VER_LIB_L_ADDR) & 0xff; + + pr_info("HDP firmware ver: %d ver_lib: %d\n", ver, ver_lib); + + return 0; +} +console_initcall(imx8mq_report_hdmi_firmware); + +void imx8m_early_setup_uart_clock(void) +{ + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART1); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART2); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART3); + imx8m_ccgr_clock_disable(IMX8M_CCM_CCGR_UART4); + + imx8m_clock_set_target_val(IMX8M_UART1_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART2_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART3_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + imx8m_clock_set_target_val(IMX8M_UART4_CLK_ROOT, + IMX8M_CCM_TARGET_ROOTn_ENABLE | + IMX8M_UART1_CLK_ROOT__25M_REF_CLK); + + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART1); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART2); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART3); + imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_UART4); +} |