// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/ * Dave Gerlach */ #include #include #include #include #define AM65X 0xbb5a #define J721E 0xbb64 #define J7200 0xbb6d #define REV_SR1_0 0 #define REV_SR2_0 1 #define JTAG_ID_VARIANT_SHIFT 28 #define JTAG_ID_VARIANT_MASK (0xf << 28) #define JTAG_ID_PARTNO_SHIFT 12 #define JTAG_ID_PARTNO_MASK (0xffff << 12) struct soc_ti_k3_platdata { const char *family; const char *revision; }; static const char *get_family_string(u32 idreg) { const char *family; u32 soc; soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT; switch (soc) { case AM65X: family = "AM65X"; break; case J721E: family = "J721E"; break; case J7200: family = "J7200"; break; default: family = "Unknown Silicon"; }; return family; } static const char *get_rev_string(u32 idreg) { const char *revision; u32 rev; rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT; switch (rev) { case REV_SR1_0: revision = "1.0"; break; case REV_SR2_0: revision = "2.0"; break; default: revision = "Unknown Revision"; }; return revision; } static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size) { struct soc_ti_k3_platdata *plat = dev_get_platdata(dev); snprintf(buf, size, "%s", plat->family); return 0; } static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size) { struct soc_ti_k3_platdata *plat = dev_get_platdata(dev); snprintf(buf, size, "SR%s", plat->revision); return 0; } static const struct soc_ops soc_ti_k3_ops = { .get_family = soc_ti_k3_get_family, .get_revision = soc_ti_k3_get_revision, }; int soc_ti_k3_probe(struct udevice *dev) { struct soc_ti_k3_platdata *plat = dev_get_platdata(dev); u32 idreg; void *idreg_addr; idreg_addr = dev_read_addr_ptr(dev); if (!idreg_addr) return -EINVAL; idreg = readl(idreg_addr); plat->family = get_family_string(idreg); plat->revision = get_rev_string(idreg); return 0; } static const struct udevice_id soc_ti_k3_ids[] = { { .compatible = "ti,am654-chipid" }, { } }; U_BOOT_DRIVER(soc_ti_k3) = { .name = "soc_ti_k3", .id = UCLASS_SOC, .ops = &soc_ti_k3_ops, .of_match = soc_ti_k3_ids, .probe = soc_ti_k3_probe, .platdata_auto_alloc_size = sizeof(struct soc_ti_k3_platdata), };