diff options
Diffstat (limited to 'drivers/soc/renesas/renesas-soc.c')
| -rw-r--r-- | drivers/soc/renesas/renesas-soc.c | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c new file mode 100644 index 000000000..0f8eff4a6 --- /dev/null +++ b/drivers/soc/renesas/renesas-soc.c @@ -0,0 +1,406 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas SoC Identification + * + * Copyright (C) 2014-2016 Glider bvba + */ + +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/sys_soc.h> + + +struct renesas_family { + const char name[16]; + u32 reg; /* CCCR or PRR, if not in DT */ +}; + +static const struct renesas_family fam_rcar_gen1 __initconst __maybe_unused = { + .name = "R-Car Gen1", + .reg = 0xff000044, /* PRR (Product Register) */ +}; + +static const struct renesas_family fam_rcar_gen2 __initconst __maybe_unused = { + .name = "R-Car Gen2", + .reg = 0xff000044, /* PRR (Product Register) */ +}; + +static const struct renesas_family fam_rcar_gen3 __initconst __maybe_unused = { + .name = "R-Car Gen3", + .reg = 0xfff00044, /* PRR (Product Register) */ +}; + +static const struct renesas_family fam_rmobile __initconst __maybe_unused = { + .name = "R-Mobile", + .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ +}; + +static const struct renesas_family fam_rza1 __initconst __maybe_unused = { + .name = "RZ/A1", +}; + +static const struct renesas_family fam_rza2 __initconst __maybe_unused = { + .name = "RZ/A2", +}; + +static const struct renesas_family fam_rzg1 __initconst __maybe_unused = { + .name = "RZ/G1", + .reg = 0xff000044, /* PRR (Product Register) */ +}; + +static const struct renesas_family fam_rzg2 __initconst __maybe_unused = { + .name = "RZ/G2", + .reg = 0xfff00044, /* PRR (Product Register) */ +}; + +static const struct renesas_family fam_shmobile __initconst __maybe_unused = { + .name = "SH-Mobile", + .reg = 0xe600101c, /* CCCR (Common Chip Code Register) */ +}; + + +struct renesas_soc { + const struct renesas_family *family; + u8 id; +}; + +static const struct renesas_soc soc_rz_a1h __initconst __maybe_unused = { + .family = &fam_rza1, +}; + +static const struct renesas_soc soc_rz_a2m __initconst __maybe_unused = { + .family = &fam_rza2, + .id = 0x3b, +}; + +static const struct renesas_soc soc_rmobile_ape6 __initconst __maybe_unused = { + .family = &fam_rmobile, + .id = 0x3f, +}; + +static const struct renesas_soc soc_rmobile_a1 __initconst __maybe_unused = { + .family = &fam_rmobile, + .id = 0x40, +}; + +static const struct renesas_soc soc_rz_g1h __initconst __maybe_unused = { + .family = &fam_rzg1, + .id = 0x45, +}; + +static const struct renesas_soc soc_rz_g1m __initconst __maybe_unused = { + .family = &fam_rzg1, + .id = 0x47, +}; + +static const struct renesas_soc soc_rz_g1n __initconst __maybe_unused = { + .family = &fam_rzg1, + .id = 0x4b, +}; + +static const struct renesas_soc soc_rz_g1e __initconst __maybe_unused = { + .family = &fam_rzg1, + .id = 0x4c, +}; + +static const struct renesas_soc soc_rz_g1c __initconst __maybe_unused = { + .family = &fam_rzg1, + .id = 0x53, +}; + +static const struct renesas_soc soc_rz_g2m __initconst __maybe_unused = { + .family = &fam_rzg2, + .id = 0x52, +}; + +static const struct renesas_soc soc_rz_g2n __initconst __maybe_unused = { + .family = &fam_rzg2, + .id = 0x55, +}; + +static const struct renesas_soc soc_rz_g2e __initconst __maybe_unused = { + .family = &fam_rzg2, + .id = 0x57, +}; + +static const struct renesas_soc soc_rz_g2h __initconst __maybe_unused = { + .family = &fam_rzg2, + .id = 0x4f, +}; + +static const struct renesas_soc soc_rcar_m1a __initconst __maybe_unused = { + .family = &fam_rcar_gen1, +}; + +static const struct renesas_soc soc_rcar_h1 __initconst __maybe_unused = { + .family = &fam_rcar_gen1, + .id = 0x3b, +}; + +static const struct renesas_soc soc_rcar_h2 __initconst __maybe_unused = { + .family = &fam_rcar_gen2, + .id = 0x45, +}; + +static const struct renesas_soc soc_rcar_m2_w __initconst __maybe_unused = { + .family = &fam_rcar_gen2, + .id = 0x47, +}; + +static const struct renesas_soc soc_rcar_v2h __initconst __maybe_unused = { + .family = &fam_rcar_gen2, + .id = 0x4a, +}; + +static const struct renesas_soc soc_rcar_m2_n __initconst __maybe_unused = { + .family = &fam_rcar_gen2, + .id = 0x4b, +}; + +static const struct renesas_soc soc_rcar_e2 __initconst __maybe_unused = { + .family = &fam_rcar_gen2, + .id = 0x4c, +}; + +static const struct renesas_soc soc_rcar_h3 __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x4f, +}; + +static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x52, +}; + +static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x55, +}; + +static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x54, +}; + +static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x56, +}; + +static const struct renesas_soc soc_rcar_e3 __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x57, +}; + +static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x58, +}; + +static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x59, +}; + +static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = { + .family = &fam_shmobile, + .id = 0x37, +}; + + +static const struct of_device_id renesas_socs[] __initconst = { +#ifdef CONFIG_ARCH_R7S72100 + { .compatible = "renesas,r7s72100", .data = &soc_rz_a1h }, +#endif +#ifdef CONFIG_ARCH_R7S9210 + { .compatible = "renesas,r7s9210", .data = &soc_rz_a2m }, +#endif +#ifdef CONFIG_ARCH_R8A73A4 + { .compatible = "renesas,r8a73a4", .data = &soc_rmobile_ape6 }, +#endif +#ifdef CONFIG_ARCH_R8A7740 + { .compatible = "renesas,r8a7740", .data = &soc_rmobile_a1 }, +#endif +#ifdef CONFIG_ARCH_R8A7742 + { .compatible = "renesas,r8a7742", .data = &soc_rz_g1h }, +#endif +#ifdef CONFIG_ARCH_R8A7743 + { .compatible = "renesas,r8a7743", .data = &soc_rz_g1m }, +#endif +#ifdef CONFIG_ARCH_R8A7744 + { .compatible = "renesas,r8a7744", .data = &soc_rz_g1n }, +#endif +#ifdef CONFIG_ARCH_R8A7745 + { .compatible = "renesas,r8a7745", .data = &soc_rz_g1e }, +#endif +#ifdef CONFIG_ARCH_R8A77470 + { .compatible = "renesas,r8a77470", .data = &soc_rz_g1c }, +#endif +#ifdef CONFIG_ARCH_R8A774A1 + { .compatible = "renesas,r8a774a1", .data = &soc_rz_g2m }, +#endif +#ifdef CONFIG_ARCH_R8A774B1 + { .compatible = "renesas,r8a774b1", .data = &soc_rz_g2n }, +#endif +#ifdef CONFIG_ARCH_R8A774C0 + { .compatible = "renesas,r8a774c0", .data = &soc_rz_g2e }, +#endif +#ifdef CONFIG_ARCH_R8A774E1 + { .compatible = "renesas,r8a774e1", .data = &soc_rz_g2h }, +#endif +#ifdef CONFIG_ARCH_R8A7778 + { .compatible = "renesas,r8a7778", .data = &soc_rcar_m1a }, +#endif +#ifdef CONFIG_ARCH_R8A7779 + { .compatible = "renesas,r8a7779", .data = &soc_rcar_h1 }, +#endif +#ifdef CONFIG_ARCH_R8A7790 + { .compatible = "renesas,r8a7790", .data = &soc_rcar_h2 }, +#endif +#ifdef CONFIG_ARCH_R8A7791 + { .compatible = "renesas,r8a7791", .data = &soc_rcar_m2_w }, +#endif +#ifdef CONFIG_ARCH_R8A7792 + { .compatible = "renesas,r8a7792", .data = &soc_rcar_v2h }, +#endif +#ifdef CONFIG_ARCH_R8A7793 + { .compatible = "renesas,r8a7793", .data = &soc_rcar_m2_n }, +#endif +#ifdef CONFIG_ARCH_R8A7794 + { .compatible = "renesas,r8a7794", .data = &soc_rcar_e2 }, +#endif +#if defined(CONFIG_ARCH_R8A77950) || defined(CONFIG_ARCH_R8A77951) + { .compatible = "renesas,r8a7795", .data = &soc_rcar_h3 }, +#endif +#ifdef CONFIG_ARCH_R8A77960 + { .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w }, +#endif +#ifdef CONFIG_ARCH_R8A77961 + { .compatible = "renesas,r8a77961", .data = &soc_rcar_m3_w }, +#endif +#ifdef CONFIG_ARCH_R8A77965 + { .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n }, +#endif +#ifdef CONFIG_ARCH_R8A77970 + { .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m }, +#endif +#ifdef CONFIG_ARCH_R8A77980 + { .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h }, +#endif +#ifdef CONFIG_ARCH_R8A77990 + { .compatible = "renesas,r8a77990", .data = &soc_rcar_e3 }, +#endif +#ifdef CONFIG_ARCH_R8A77995 + { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 }, +#endif +#ifdef CONFIG_ARCH_R8A779A0 + { .compatible = "renesas,r8a779a0", .data = &soc_rcar_v3u }, +#endif +#ifdef CONFIG_ARCH_SH73A0 + { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 }, +#endif + { /* sentinel */ } +}; + +static int __init renesas_soc_init(void) +{ + struct soc_device_attribute *soc_dev_attr; + const struct renesas_family *family; + const struct of_device_id *match; + const struct renesas_soc *soc; + void __iomem *chipid = NULL; + struct soc_device *soc_dev; + struct device_node *np; + unsigned int product, eshi = 0, eslo; + + match = of_match_node(renesas_socs, of_root); + if (!match) + return -ENODEV; + + soc = match->data; + family = soc->family; + + np = of_find_compatible_node(NULL, NULL, "renesas,bsid"); + if (np) { + chipid = of_iomap(np, 0); + of_node_put(np); + + if (chipid) { + product = readl(chipid); + iounmap(chipid); + + if (soc->id && ((product >> 16) & 0xff) != soc->id) { + pr_warn("SoC mismatch (product = 0x%x)\n", + product); + return -ENODEV; + } + } + + /* + * TODO: Upper 4 bits of BSID are for chip version, but the + * format is not known at this time so we don't know how to + * specify eshi and eslo + */ + + goto done; + } + + /* Try PRR first, then hardcoded fallback */ + np = of_find_compatible_node(NULL, NULL, "renesas,prr"); + if (np) { + chipid = of_iomap(np, 0); + of_node_put(np); + } else if (soc->id && family->reg) { + chipid = ioremap(family->reg, 4); + } + if (chipid) { + product = readl(chipid); + iounmap(chipid); + /* R-Car M3-W ES1.1 incorrectly identifies as ES2.0 */ + if ((product & 0x7fff) == 0x5210) + product ^= 0x11; + /* R-Car M3-W ES1.3 incorrectly identifies as ES2.1 */ + if ((product & 0x7fff) == 0x5211) + product ^= 0x12; + if (soc->id && ((product >> 8) & 0xff) != soc->id) { + pr_warn("SoC mismatch (product = 0x%x)\n", product); + return -ENODEV; + } + eshi = ((product >> 4) & 0x0f) + 1; + eslo = product & 0xf; + } + +done: + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + np = of_find_node_by_path("/"); + of_property_read_string(np, "model", &soc_dev_attr->machine); + of_node_put(np); + + soc_dev_attr->family = kstrdup_const(family->name, GFP_KERNEL); + soc_dev_attr->soc_id = kstrdup_const(strchr(match->compatible, ',') + 1, + GFP_KERNEL); + if (eshi) + soc_dev_attr->revision = kasprintf(GFP_KERNEL, "ES%u.%u", eshi, + eslo); + + pr_info("Detected Renesas %s %s %s\n", soc_dev_attr->family, + soc_dev_attr->soc_id, soc_dev_attr->revision ?: ""); + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->revision); + kfree_const(soc_dev_attr->soc_id); + kfree_const(soc_dev_attr->family); + kfree(soc_dev_attr); + return PTR_ERR(soc_dev); + } + + return 0; +} +early_initcall(renesas_soc_init); |