249 lines
6.1 KiB
C
249 lines
6.1 KiB
C
/*
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* Freescale QorIQ Platforms GUTS Driver
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*
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* Copyright (C) 2016 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/of_fdt.h>
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#include <linux/sys_soc.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/fsl/guts.h>
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struct guts {
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struct ccsr_guts __iomem *regs;
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bool little_endian;
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};
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struct fsl_soc_die_attr {
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char *die;
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u32 svr;
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u32 mask;
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};
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static struct guts *guts;
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static struct soc_device_attribute soc_dev_attr;
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static struct soc_device *soc_dev;
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/* SoC die attribute definition for QorIQ platform */
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static const struct fsl_soc_die_attr fsl_soc_die[] = {
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/*
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* Power Architecture-based SoCs T Series
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*/
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/* Die: T4240, SoC: T4240/T4160/T4080 */
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{ .die = "T4240",
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.svr = 0x82400000,
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.mask = 0xfff00000,
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},
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/* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
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{ .die = "T1040",
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.svr = 0x85200000,
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.mask = 0xfff00000,
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},
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/* Die: T2080, SoC: T2080/T2081 */
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{ .die = "T2080",
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.svr = 0x85300000,
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.mask = 0xfff00000,
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},
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/* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
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{ .die = "T1024",
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.svr = 0x85400000,
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.mask = 0xfff00000,
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},
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/*
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* ARM-based SoCs LS Series
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*/
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/* Die: LS1043A, SoC: LS1043A/LS1023A */
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{ .die = "LS1043A",
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.svr = 0x87920000,
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.mask = 0xffff0000,
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},
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/* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
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{ .die = "LS2080A",
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.svr = 0x87010000,
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.mask = 0xff3f0000,
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},
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/* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
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{ .die = "LS1088A",
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.svr = 0x87030000,
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.mask = 0xff3f0000,
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},
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/* Die: LS1012A, SoC: LS1012A */
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{ .die = "LS1012A",
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.svr = 0x87040000,
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.mask = 0xffff0000,
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},
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/* Die: LS1046A, SoC: LS1046A/LS1026A */
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{ .die = "LS1046A",
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.svr = 0x87070000,
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.mask = 0xffff0000,
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},
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/* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
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{ .die = "LS2088A",
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.svr = 0x87090000,
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.mask = 0xff3f0000,
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},
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/* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
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{ .die = "LS1021A",
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.svr = 0x87000000,
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.mask = 0xfff70000,
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},
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{ },
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};
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static const struct fsl_soc_die_attr *fsl_soc_die_match(
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u32 svr, const struct fsl_soc_die_attr *matches)
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{
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while (matches->svr) {
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if (matches->svr == (svr & matches->mask))
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return matches;
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matches++;
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};
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return NULL;
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}
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u32 fsl_guts_get_svr(void)
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{
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u32 svr = 0;
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if (!guts || !guts->regs)
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return svr;
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if (guts->little_endian)
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svr = ioread32(&guts->regs->svr);
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else
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svr = ioread32be(&guts->regs->svr);
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return svr;
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}
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EXPORT_SYMBOL(fsl_guts_get_svr);
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static int fsl_guts_probe(struct platform_device *pdev)
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{
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struct device_node *root, *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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struct resource *res;
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const struct fsl_soc_die_attr *soc_die;
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const char *machine;
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u32 svr;
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/* Initialize guts */
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guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
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if (!guts)
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return -ENOMEM;
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guts->little_endian = of_property_read_bool(np, "little-endian");
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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guts->regs = devm_ioremap_resource(dev, res);
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if (IS_ERR(guts->regs))
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return PTR_ERR(guts->regs);
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/* Register soc device */
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root = of_find_node_by_path("/");
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if (of_property_read_string(root, "model", &machine))
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of_property_read_string_index(root, "compatible", 0, &machine);
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of_node_put(root);
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if (machine)
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soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
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svr = fsl_guts_get_svr();
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soc_die = fsl_soc_die_match(svr, fsl_soc_die);
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if (soc_die) {
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soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
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"QorIQ %s", soc_die->die);
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} else {
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soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
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}
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if (!soc_dev_attr.family)
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return -ENOMEM;
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soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
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"svr:0x%08x", svr);
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if (!soc_dev_attr.soc_id)
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return -ENOMEM;
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soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
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(svr >> 4) & 0xf, svr & 0xf);
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if (!soc_dev_attr.revision)
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return -ENOMEM;
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soc_dev = soc_device_register(&soc_dev_attr);
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if (IS_ERR(soc_dev))
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return PTR_ERR(soc_dev);
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pr_info("Machine: %s\n", soc_dev_attr.machine);
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pr_info("SoC family: %s\n", soc_dev_attr.family);
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pr_info("SoC ID: %s, Revision: %s\n",
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soc_dev_attr.soc_id, soc_dev_attr.revision);
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return 0;
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}
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static int fsl_guts_remove(struct platform_device *dev)
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{
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soc_device_unregister(soc_dev);
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return 0;
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}
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/*
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* Table for matching compatible strings, for device tree
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* guts node, for Freescale QorIQ SOCs.
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*/
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static const struct of_device_id fsl_guts_of_match[] = {
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{ .compatible = "fsl,qoriq-device-config-1.0", },
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{ .compatible = "fsl,qoriq-device-config-2.0", },
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{ .compatible = "fsl,p1010-guts", },
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{ .compatible = "fsl,p1020-guts", },
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{ .compatible = "fsl,p1021-guts", },
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{ .compatible = "fsl,p1022-guts", },
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{ .compatible = "fsl,p1023-guts", },
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{ .compatible = "fsl,p2020-guts", },
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{ .compatible = "fsl,bsc9131-guts", },
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{ .compatible = "fsl,bsc9132-guts", },
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{ .compatible = "fsl,mpc8536-guts", },
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{ .compatible = "fsl,mpc8544-guts", },
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{ .compatible = "fsl,mpc8548-guts", },
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{ .compatible = "fsl,mpc8568-guts", },
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{ .compatible = "fsl,mpc8569-guts", },
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{ .compatible = "fsl,mpc8572-guts", },
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{ .compatible = "fsl,ls1021a-dcfg", },
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{ .compatible = "fsl,ls1043a-dcfg", },
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{ .compatible = "fsl,ls2080a-dcfg", },
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{ .compatible = "fsl,ls1088a-dcfg", },
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{ .compatible = "fsl,ls1012a-dcfg", },
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{ .compatible = "fsl,ls1046a-dcfg", },
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{}
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};
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MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
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static struct platform_driver fsl_guts_driver = {
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.driver = {
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.name = "fsl-guts",
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.of_match_table = fsl_guts_of_match,
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},
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.probe = fsl_guts_probe,
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.remove = fsl_guts_remove,
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};
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static int __init fsl_guts_init(void)
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{
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return platform_driver_register(&fsl_guts_driver);
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}
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core_initcall(fsl_guts_init);
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static void __exit fsl_guts_exit(void)
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{
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platform_driver_unregister(&fsl_guts_driver);
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}
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module_exit(fsl_guts_exit);
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