diff options
Diffstat (limited to 'arch/arm/mach-imx/imx8m.c')
-rw-r--r-- | arch/arm/mach-imx/imx8m.c | 111 |
1 files changed, 111 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..d06ba098c3 --- /dev/null +++ b/arch/arm/mach-imx/imx8m.c @@ -0,0 +1,111 @@ +/* + * 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. + * + */ + +#include <init.h> +#include <common.h> +#include <io.h> +#include <asm/syscounter.h> +#include <asm/system.h> +#include <mach/generic.h> +#include <mach/revision.h> +#include <mach/imx8mq.h> +#include <mach/reset-reason.h> +#include <mach/ocotp.h> + +#include <linux/iopoll.h> +#include <linux/arm-smccc.h> + +#define FSL_SIP_BUILDINFO 0xC2000003 +#define FSL_SIP_BUILDINFO_GET_COMMITHASH 0x00 + +u64 imx8mq_uid(void) +{ + return imx_ocotp_read_uid(IOMEM(MX8MQ_OCOTP_BASE_ADDR)); +} + +int imx8mq_init(void) +{ + void __iomem *anatop = IOMEM(MX8MQ_ANATOP_BASE_ADDR); + void __iomem *src = IOMEM(MX8MQ_SRC_BASE_ADDR); + uint32_t type = FIELD_GET(DIGPROG_MAJOR, + readl(anatop + MX8MQ_ANATOP_DIGPROG)); + struct arm_smccc_res res; + const char *cputypestr; + + imx8_boot_save_loc(); + + switch (type) { + case IMX8M_CPUTYPE_IMX8MQ: + cputypestr = "i.MX8MQ"; + break; + default: + cputypestr = "unknown i.MX8M"; + break; + }; + + imx_set_silicon_revision(cputypestr, imx8mq_cpu_revision()); + /* + * Reset reasons seem to be identical to that of i.MX7 + */ + imx_set_reset_reason(src + IMX7_SRC_SRSR, imx7_reset_reasons); + pr_info("%s unique ID: %llx\n", cputypestr, imx8mq_uid()); + + if (IS_ENABLED(CONFIG_ARM_SMCCC) && + IS_ENABLED(CONFIG_FIRMWARE_IMX8MQ_ATF)) { + arm_smccc_smc(FSL_SIP_BUILDINFO, + FSL_SIP_BUILDINFO_GET_COMMITHASH, + 0, 0, 0, 0, 0, 0, &res); + pr_info("i.MX ARM Trusted Firmware: %s\n", (char *)&res.a0); + } + + return 0; +} + +#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); |