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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
129 lines
2.4 KiB
C
129 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
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* Dave Gerlach <d-gerlach@ti.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <soc.h>
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#include <asm/io.h>
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#define AM65X 0xbb5a
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#define J721E 0xbb64
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#define J7200 0xbb6d
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#define REV_SR1_0 0
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#define REV_SR2_0 1
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#define JTAG_ID_VARIANT_SHIFT 28
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#define JTAG_ID_VARIANT_MASK (0xf << 28)
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#define JTAG_ID_PARTNO_SHIFT 12
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#define JTAG_ID_PARTNO_MASK (0xffff << 12)
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struct soc_ti_k3_platdata {
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const char *family;
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const char *revision;
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};
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static const char *get_family_string(u32 idreg)
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{
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const char *family;
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u32 soc;
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soc = (idreg & JTAG_ID_PARTNO_MASK) >> JTAG_ID_PARTNO_SHIFT;
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switch (soc) {
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case AM65X:
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family = "AM65X";
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break;
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case J721E:
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family = "J721E";
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break;
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case J7200:
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family = "J7200";
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break;
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default:
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family = "Unknown Silicon";
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};
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return family;
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}
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static const char *get_rev_string(u32 idreg)
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{
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const char *revision;
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u32 rev;
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rev = (idreg & JTAG_ID_VARIANT_MASK) >> JTAG_ID_VARIANT_SHIFT;
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switch (rev) {
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case REV_SR1_0:
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revision = "1.0";
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break;
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case REV_SR2_0:
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revision = "2.0";
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break;
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default:
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revision = "Unknown Revision";
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};
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return revision;
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}
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static int soc_ti_k3_get_family(struct udevice *dev, char *buf, int size)
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{
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struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
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snprintf(buf, size, "%s", plat->family);
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return 0;
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}
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static int soc_ti_k3_get_revision(struct udevice *dev, char *buf, int size)
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{
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struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
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snprintf(buf, size, "SR%s", plat->revision);
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return 0;
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}
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static const struct soc_ops soc_ti_k3_ops = {
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.get_family = soc_ti_k3_get_family,
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.get_revision = soc_ti_k3_get_revision,
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};
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int soc_ti_k3_probe(struct udevice *dev)
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{
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struct soc_ti_k3_platdata *plat = dev_get_platdata(dev);
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u32 idreg;
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void *idreg_addr;
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idreg_addr = dev_read_addr_ptr(dev);
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if (!idreg_addr)
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return -EINVAL;
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idreg = readl(idreg_addr);
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plat->family = get_family_string(idreg);
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plat->revision = get_rev_string(idreg);
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return 0;
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}
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static const struct udevice_id soc_ti_k3_ids[] = {
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{ .compatible = "ti,am654-chipid" },
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{ }
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};
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U_BOOT_DRIVER(soc_ti_k3) = {
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.name = "soc_ti_k3",
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.id = UCLASS_SOC,
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.ops = &soc_ti_k3_ops,
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.of_match = soc_ti_k3_ids,
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.probe = soc_ti_k3_probe,
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.platdata_auto = sizeof(struct soc_ti_k3_platdata),
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};
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