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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
- * Dave Gerlach <d-gerlach@ti.com>
- */
- #include <common.h>
- #include <dm.h>
- #include <soc.h>
- #include <asm/io.h>
- #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),
- };
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