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dcb1b7b644
The older i.MX8M Mini Verdin SoMs may came with 20 MHz SPI CAN controller oscillator, the newer SoMs always use 40 MHz oscillator. Handle both by overriding the oscillator frequency just before booting the kernel. These are the known variants with 20 MHz oscillator: - 0055, V1.1A, V1.1B, V1.1C and V1.1D, use a 20MHz oscillator - 0059, V1.1A and V1.1B, use a 20MHz oscillator Signed-off-by: Marek Vasut <marex@denx.de> Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
161 lines
3.6 KiB
C
161 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2020-2021 Toradex
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*/
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#include <config.h>
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#include <init.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <hang.h>
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#include <i2c.h>
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#include <micrel.h>
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#include <miiphy.h>
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#include <netdev.h>
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#include "../common/tdx-cfg-block.h"
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DECLARE_GLOBAL_DATA_PTR;
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#define I2C_PMIC 0
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enum pcb_rev_t {
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PCB_VERSION_1_0,
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PCB_VERSION_1_1
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};
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#if IS_ENABLED(CONFIG_FEC_MXC)
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static int setup_fec(void)
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{
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struct iomuxc_gpr_base_regs *gpr =
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(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
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/* Use 125M anatop REF_CLK1 for ENET1, not from external */
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clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
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return 0;
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}
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#endif
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int board_init(void)
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{
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if (IS_ENABLED(CONFIG_FEC_MXC))
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setup_fec();
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return 0;
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}
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int board_mmc_get_env_dev(int devno)
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{
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return devno;
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}
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static enum pcb_rev_t get_pcb_revision(void)
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{
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struct udevice *bus;
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struct udevice *i2c_dev = NULL;
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int ret;
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u8 is_bd71837 = 0;
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ret = uclass_get_device_by_seq(UCLASS_I2C, I2C_PMIC, &bus);
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if (!ret)
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ret = dm_i2c_probe(bus, 0x4b, 0, &i2c_dev);
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if (!ret)
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ret = dm_i2c_read(i2c_dev, 0x0, &is_bd71837, 1);
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/* BD71837_REV, High Nibble is major version, fix 1010 */
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is_bd71837 = !ret && ((is_bd71837 & 0xf0) == 0xa0);
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return is_bd71837 ? PCB_VERSION_1_0 : PCB_VERSION_1_1;
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}
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static void select_dt_from_module_version(void)
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{
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char variant[32];
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char *env_variant = env_get("variant");
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int is_wifi = 0;
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if (IS_ENABLED(CONFIG_TDX_CFG_BLOCK)) {
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/*
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* If we have a valid config block and it says we are a
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* module with Wi-Fi/Bluetooth make sure we use the -wifi
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* device tree.
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*/
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is_wifi = (tdx_hw_tag.prodid == VERDIN_IMX8MMQ_WIFI_BT_IT) ||
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(tdx_hw_tag.prodid == VERDIN_IMX8MMDL_WIFI_BT_IT) ||
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(tdx_hw_tag.prodid == VERDIN_IMX8MMQ_WIFI_BT_IT_NO_CAN) ||
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(tdx_hw_tag.prodid == VERDIN_IMX8MMQ_4G_WIFI_BT_ET);
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}
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switch (get_pcb_revision()) {
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case PCB_VERSION_1_0:
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printf("Detected a V1.0 module which is no longer supported in this BSP version\n");
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hang();
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default:
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if (is_wifi)
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strlcpy(&variant[0], "wifi", sizeof(variant));
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else
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strlcpy(&variant[0], "nonwifi", sizeof(variant));
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break;
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}
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if (strcmp(variant, env_variant)) {
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printf("Setting variant to %s\n", variant);
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env_set("variant", variant);
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}
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}
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int board_late_init(void)
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{
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select_dt_from_module_version();
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return 0;
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}
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int board_phys_sdram_size(phys_size_t *size)
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{
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if (!size)
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return -EINVAL;
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*size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE + PHYS_SDRAM_2_SIZE);
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return 0;
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}
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#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
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int ft_board_setup(void *blob, struct bd_info *bd)
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{
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const char *canoscpath = "/oscillator";
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int freq = 40000000; /* 40 MHz is used on most variants */
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int canoscoff, ret;
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canoscoff = fdt_path_offset(blob, canoscpath);
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if (canoscoff < 0) /* No CAN oscillator found. */
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goto exit;
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/*
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* The following "prodid" (PID4 in Toradex naming) use
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* a 20MHz CAN oscillator:
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* - 0055, V1.1A, V1.1B, V1.1C and V1.1D
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* - 0059, V1.1A and V1.1B
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*/
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if ((tdx_hw_tag.ver_major == 1 && tdx_hw_tag.ver_minor == 1) &&
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((tdx_hw_tag.prodid == VERDIN_IMX8MMQ_IT &&
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tdx_hw_tag.ver_assembly <= 1) || /* 0059 rev. A or B */
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(tdx_hw_tag.prodid == VERDIN_IMX8MMQ_WIFI_BT_IT &&
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tdx_hw_tag.ver_assembly <= 3))) { /* 0055 rev. A/B/C/D */
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freq = 20000000;
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}
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ret = fdt_setprop_u32(blob, canoscoff, "clock-frequency", freq);
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if (ret < 0) {
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printf("Failed to set CAN oscillator clock-frequency, ret=%d\n",
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ret);
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}
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exit:
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return ft_common_board_setup(blob, bd);
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}
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#endif
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