| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2015 Atmel |
| * |
| * Alexandre Belloni <alexandre.belloni@free-electrons.com |
| * Boris Brezillon <boris.brezillon@free-electrons.com |
| */ |
| |
| #define pr_fmt(fmt) "AT91: " fmt |
| |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/slab.h> |
| #include <linux/sys_soc.h> |
| |
| #include "soc.h" |
| |
| #define AT91_DBGU_CIDR 0x40 |
| #define AT91_DBGU_EXID 0x44 |
| #define AT91_CHIPID_CIDR 0x00 |
| #define AT91_CHIPID_EXID 0x04 |
| #define AT91_CIDR_VERSION(x, m) ((x) & (m)) |
| #define AT91_CIDR_VERSION_MASK GENMASK(4, 0) |
| #define AT91_CIDR_VERSION_MASK_SAMA7G5 GENMASK(3, 0) |
| #define AT91_CIDR_EXT BIT(31) |
| #define AT91_CIDR_MATCH_MASK GENMASK(30, 5) |
| #define AT91_CIDR_MASK_SAMA7G5 GENMASK(27, 5) |
| |
| static const struct at91_soc socs[] __initconst = { |
| #ifdef CONFIG_SOC_AT91RM9200 |
| AT91_SOC(AT91RM9200_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91rm9200 BGA", "at91rm9200"), |
| #endif |
| #ifdef CONFIG_SOC_AT91SAM9 |
| AT91_SOC(AT91SAM9260_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9260", NULL), |
| AT91_SOC(AT91SAM9261_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9261", NULL), |
| AT91_SOC(AT91SAM9263_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9263", NULL), |
| AT91_SOC(AT91SAM9G20_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9g20", NULL), |
| AT91_SOC(AT91SAM9RL64_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9rl64", NULL), |
| AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9M11_EXID_MATCH, |
| "at91sam9m11", "at91sam9g45"), |
| AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9M10_EXID_MATCH, |
| "at91sam9m10", "at91sam9g45"), |
| AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9G46_EXID_MATCH, |
| "at91sam9g46", "at91sam9g45"), |
| AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9G45_EXID_MATCH, |
| "at91sam9g45", "at91sam9g45"), |
| AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9G15_EXID_MATCH, |
| "at91sam9g15", "at91sam9x5"), |
| AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9G35_EXID_MATCH, |
| "at91sam9g35", "at91sam9x5"), |
| AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9X35_EXID_MATCH, |
| "at91sam9x35", "at91sam9x5"), |
| AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9G25_EXID_MATCH, |
| "at91sam9g25", "at91sam9x5"), |
| AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9X25_EXID_MATCH, |
| "at91sam9x25", "at91sam9x5"), |
| AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9CN12_EXID_MATCH, |
| "at91sam9cn12", "at91sam9n12"), |
| AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9N12_EXID_MATCH, |
| "at91sam9n12", "at91sam9n12"), |
| AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, AT91SAM9CN11_EXID_MATCH, |
| "at91sam9cn11", "at91sam9n12"), |
| AT91_SOC(AT91SAM9XE128_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9xe128", "at91sam9xe128"), |
| AT91_SOC(AT91SAM9XE256_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9xe256", "at91sam9xe256"), |
| AT91_SOC(AT91SAM9XE512_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, 0, "at91sam9xe512", "at91sam9xe512"), |
| #endif |
| #ifdef CONFIG_SOC_SAM9X60 |
| AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAM9X60_EXID_MATCH, |
| "sam9x60", "sam9x60"), |
| AT91_SOC(SAM9X60_CIDR_MATCH, SAM9X60_D5M_EXID_MATCH, |
| AT91_CIDR_VERSION_MASK, SAM9X60_EXID_MATCH, |
| "sam9x60 64MiB DDR2 SiP", "sam9x60"), |
| AT91_SOC(SAM9X60_CIDR_MATCH, SAM9X60_D1G_EXID_MATCH, |
| AT91_CIDR_VERSION_MASK, SAM9X60_EXID_MATCH, |
| "sam9x60 128MiB DDR2 SiP", "sam9x60"), |
| AT91_SOC(SAM9X60_CIDR_MATCH, SAM9X60_D6K_EXID_MATCH, |
| AT91_CIDR_VERSION_MASK, SAM9X60_EXID_MATCH, |
| "sam9x60 8MiB SDRAM SiP", "sam9x60"), |
| #endif |
| #ifdef CONFIG_SOC_SAMA5 |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D21CU_EXID_MATCH, |
| "sama5d21", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D22CU_EXID_MATCH, |
| "sama5d22", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D225C_D1M_EXID_MATCH, |
| "sama5d225c 16MiB SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D23CU_EXID_MATCH, |
| "sama5d23", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D24CX_EXID_MATCH, |
| "sama5d24", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D24CU_EXID_MATCH, |
| "sama5d24", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D26CU_EXID_MATCH, |
| "sama5d26", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27CU_EXID_MATCH, |
| "sama5d27", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27CN_EXID_MATCH, |
| "sama5d27", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27C_D1G_EXID_MATCH, |
| "sama5d27c 128MiB SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27C_D5M_EXID_MATCH, |
| "sama5d27c 64MiB SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27C_LD1G_EXID_MATCH, |
| "sama5d27c 128MiB LPDDR2 SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D27C_LD2G_EXID_MATCH, |
| "sama5d27c 256MiB LPDDR2 SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D28CU_EXID_MATCH, |
| "sama5d28", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D28CN_EXID_MATCH, |
| "sama5d28", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D28C_D1G_EXID_MATCH, |
| "sama5d28c 128MiB SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D28C_LD1G_EXID_MATCH, |
| "sama5d28c 128MiB LPDDR2 SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D28C_LD2G_EXID_MATCH, |
| "sama5d28c 256MiB LPDDR2 SiP", "sama5d2"), |
| AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D29CN_EXID_MATCH, |
| "sama5d29", "sama5d2"), |
| AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D31_EXID_MATCH, |
| "sama5d31", "sama5d3"), |
| AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D33_EXID_MATCH, |
| "sama5d33", "sama5d3"), |
| AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D34_EXID_MATCH, |
| "sama5d34", "sama5d3"), |
| AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D35_EXID_MATCH, |
| "sama5d35", "sama5d3"), |
| AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D36_EXID_MATCH, |
| "sama5d36", "sama5d3"), |
| AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D41_EXID_MATCH, |
| "sama5d41", "sama5d4"), |
| AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D42_EXID_MATCH, |
| "sama5d42", "sama5d4"), |
| AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D43_EXID_MATCH, |
| "sama5d43", "sama5d4"), |
| AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMA5D44_EXID_MATCH, |
| "sama5d44", "sama5d4"), |
| #endif |
| #ifdef CONFIG_SOC_SAMV7 |
| AT91_SOC(SAME70Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAME70Q21_EXID_MATCH, |
| "same70q21", "same7"), |
| AT91_SOC(SAME70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAME70Q20_EXID_MATCH, |
| "same70q20", "same7"), |
| AT91_SOC(SAME70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAME70Q19_EXID_MATCH, |
| "same70q19", "same7"), |
| AT91_SOC(SAMS70Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMS70Q21_EXID_MATCH, |
| "sams70q21", "sams7"), |
| AT91_SOC(SAMS70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMS70Q20_EXID_MATCH, |
| "sams70q20", "sams7"), |
| AT91_SOC(SAMS70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMS70Q19_EXID_MATCH, |
| "sams70q19", "sams7"), |
| AT91_SOC(SAMV71Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMV71Q21_EXID_MATCH, |
| "samv71q21", "samv7"), |
| AT91_SOC(SAMV71Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMV71Q20_EXID_MATCH, |
| "samv71q20", "samv7"), |
| AT91_SOC(SAMV71Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMV71Q19_EXID_MATCH, |
| "samv71q19", "samv7"), |
| AT91_SOC(SAMV70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMV70Q20_EXID_MATCH, |
| "samv70q20", "samv7"), |
| AT91_SOC(SAMV70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK, SAMV70Q19_EXID_MATCH, |
| "samv70q19", "samv7"), |
| #endif |
| #ifdef CONFIG_SOC_SAMA7 |
| AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G51_EXID_MATCH, |
| "sama7g51", "sama7g5"), |
| AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G52_EXID_MATCH, |
| "sama7g52", "sama7g5"), |
| AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G53_EXID_MATCH, |
| "sama7g53", "sama7g5"), |
| AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK, |
| AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G54_EXID_MATCH, |
| "sama7g54", "sama7g5"), |
| #endif |
| { /* sentinel */ }, |
| }; |
| |
| static int __init at91_get_cidr_exid_from_dbgu(u32 *cidr, u32 *exid) |
| { |
| struct device_node *np; |
| void __iomem *regs; |
| |
| np = of_find_compatible_node(NULL, NULL, "atmel,at91rm9200-dbgu"); |
| if (!np) |
| np = of_find_compatible_node(NULL, NULL, |
| "atmel,at91sam9260-dbgu"); |
| if (!np) |
| return -ENODEV; |
| |
| regs = of_iomap(np, 0); |
| of_node_put(np); |
| |
| if (!regs) { |
| pr_warn("Could not map DBGU iomem range"); |
| return -ENXIO; |
| } |
| |
| *cidr = readl(regs + AT91_DBGU_CIDR); |
| *exid = readl(regs + AT91_DBGU_EXID); |
| |
| iounmap(regs); |
| |
| return 0; |
| } |
| |
| static int __init at91_get_cidr_exid_from_chipid(u32 *cidr, u32 *exid) |
| { |
| struct device_node *np; |
| void __iomem *regs; |
| static const struct of_device_id chipids[] = { |
| { .compatible = "atmel,sama5d2-chipid" }, |
| { .compatible = "microchip,sama7g5-chipid" }, |
| { }, |
| }; |
| |
| np = of_find_matching_node(NULL, chipids); |
| if (!np) |
| return -ENODEV; |
| |
| regs = of_iomap(np, 0); |
| of_node_put(np); |
| |
| if (!regs) { |
| pr_warn("Could not map DBGU iomem range"); |
| return -ENXIO; |
| } |
| |
| *cidr = readl(regs + AT91_CHIPID_CIDR); |
| *exid = readl(regs + AT91_CHIPID_EXID); |
| |
| iounmap(regs); |
| |
| return 0; |
| } |
| |
| struct soc_device * __init at91_soc_init(const struct at91_soc *socs) |
| { |
| struct soc_device_attribute *soc_dev_attr; |
| const struct at91_soc *soc; |
| struct soc_device *soc_dev; |
| u32 cidr, exid; |
| int ret; |
| |
| /* |
| * With SAMA5D2 and later SoCs, CIDR and EXID registers are no more |
| * in the dbgu device but in the chipid device whose purpose is only |
| * to expose these two registers. |
| */ |
| ret = at91_get_cidr_exid_from_dbgu(&cidr, &exid); |
| if (ret) |
| ret = at91_get_cidr_exid_from_chipid(&cidr, &exid); |
| if (ret) { |
| if (ret == -ENODEV) |
| pr_warn("Could not find identification node"); |
| return NULL; |
| } |
| |
| for (soc = socs; soc->name; soc++) { |
| if (soc->cidr_match != (cidr & soc->cidr_mask)) |
| continue; |
| |
| if (!(cidr & AT91_CIDR_EXT) || soc->exid_match == exid) |
| break; |
| } |
| |
| if (!soc->name) { |
| pr_warn("Could not find matching SoC description\n"); |
| return NULL; |
| } |
| |
| soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
| if (!soc_dev_attr) |
| return NULL; |
| |
| soc_dev_attr->family = soc->family; |
| soc_dev_attr->soc_id = soc->name; |
| soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%X", |
| AT91_CIDR_VERSION(cidr, soc->version_mask)); |
| soc_dev = soc_device_register(soc_dev_attr); |
| if (IS_ERR(soc_dev)) { |
| kfree(soc_dev_attr->revision); |
| kfree(soc_dev_attr); |
| pr_warn("Could not register SoC device\n"); |
| return NULL; |
| } |
| |
| if (soc->family) |
| pr_info("Detected SoC family: %s\n", soc->family); |
| pr_info("Detected SoC: %s, revision %X\n", soc->name, |
| AT91_CIDR_VERSION(cidr, soc->version_mask)); |
| |
| return soc_dev; |
| } |
| |
| static const struct of_device_id at91_soc_allowed_list[] __initconst = { |
| { .compatible = "atmel,at91rm9200", }, |
| { .compatible = "atmel,at91sam9", }, |
| { .compatible = "atmel,sama5", }, |
| { .compatible = "atmel,samv7", }, |
| { .compatible = "microchip,sama7g5", }, |
| { } |
| }; |
| |
| static int __init atmel_soc_device_init(void) |
| { |
| struct device_node *np = of_find_node_by_path("/"); |
| |
| if (!of_match_node(at91_soc_allowed_list, np)) |
| return 0; |
| |
| at91_soc_init(socs); |
| |
| return 0; |
| } |
| subsys_initcall(atmel_soc_device_init); |
