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-rw-r--r--drivers/soc/atmel/Kconfig18
-rw-r--r--drivers/soc/atmel/Makefile3
-rw-r--r--drivers/soc/atmel/sfr.c99
-rw-r--r--drivers/soc/atmel/soc.c379
-rw-r--r--drivers/soc/atmel/soc.h139
5 files changed, 638 insertions, 0 deletions
diff --git a/drivers/soc/atmel/Kconfig b/drivers/soc/atmel/Kconfig
new file mode 100644
index 000000000..50caf6db9
--- /dev/null
+++ b/drivers/soc/atmel/Kconfig
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config AT91_SOC_ID
+ bool "SoC bus for Atmel ARM SoCs"
+ depends on ARCH_AT91 || COMPILE_TEST
+ default ARCH_AT91
+ help
+ Include support for the SoC bus on the Atmel ARM SoCs.
+
+config AT91_SOC_SFR
+ tristate "Special Function Registers support"
+ depends on ARCH_AT91 || COMPILE_TEST
+ help
+ This is a driver for the Special Function Registers available on
+ Atmel SAMA5Dx SoCs, providing access to specific aspects of the
+ integrated memory, bridge implementations, processor etc.
+
+ This driver can also be built as a module. If so, the module
+ will be called sfr.
diff --git a/drivers/soc/atmel/Makefile b/drivers/soc/atmel/Makefile
new file mode 100644
index 000000000..d849a897c
--- /dev/null
+++ b/drivers/soc/atmel/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_AT91_SOC_ID) += soc.o
+obj-$(CONFIG_AT91_SOC_SFR) += sfr.o
diff --git a/drivers/soc/atmel/sfr.c b/drivers/soc/atmel/sfr.c
new file mode 100644
index 000000000..0525eef49
--- /dev/null
+++ b/drivers/soc/atmel/sfr.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sfr.c - driver for special function registers
+ *
+ * Copyright (C) 2019 Bootlin.
+ *
+ */
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/random.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define SFR_SN0 0x4c
+#define SFR_SN_SIZE 8
+
+struct atmel_sfr_priv {
+ struct regmap *regmap;
+};
+
+static int atmel_sfr_read(void *context, unsigned int offset,
+ void *buf, size_t bytes)
+{
+ struct atmel_sfr_priv *priv = context;
+
+ return regmap_bulk_read(priv->regmap, SFR_SN0 + offset,
+ buf, bytes / 4);
+}
+
+static struct nvmem_config atmel_sfr_nvmem_config = {
+ .name = "atmel-sfr",
+ .read_only = true,
+ .word_size = 4,
+ .stride = 4,
+ .size = SFR_SN_SIZE,
+ .reg_read = atmel_sfr_read,
+};
+
+static int atmel_sfr_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct nvmem_device *nvmem;
+ struct atmel_sfr_priv *priv;
+ u8 sn[SFR_SN_SIZE];
+ int ret;
+
+ priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(dev, "cannot get parent's regmap\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ atmel_sfr_nvmem_config.dev = dev;
+ atmel_sfr_nvmem_config.priv = priv;
+
+ nvmem = devm_nvmem_register(dev, &atmel_sfr_nvmem_config);
+ if (IS_ERR(nvmem)) {
+ dev_err(dev, "error registering nvmem config\n");
+ return PTR_ERR(nvmem);
+ }
+
+ ret = atmel_sfr_read(priv, 0, sn, SFR_SN_SIZE);
+ if (ret == 0)
+ add_device_randomness(sn, SFR_SN_SIZE);
+
+ return ret;
+}
+
+static const struct of_device_id atmel_sfr_dt_ids[] = {
+ {
+ .compatible = "atmel,sama5d2-sfr",
+ }, {
+ .compatible = "atmel,sama5d4-sfr",
+ }, {
+ /* sentinel */
+ },
+};
+MODULE_DEVICE_TABLE(of, atmel_sfr_dt_ids);
+
+static struct platform_driver atmel_sfr_driver = {
+ .probe = atmel_sfr_probe,
+ .driver = {
+ .name = "atmel-sfr",
+ .of_match_table = atmel_sfr_dt_ids,
+ },
+};
+module_platform_driver(atmel_sfr_driver);
+
+MODULE_AUTHOR("Kamel Bouhara <kamel.bouhara@bootlin.com>");
+MODULE_DESCRIPTION("Atmel SFR SN driver for SAMA5D2/4 SoC family");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/atmel/soc.c b/drivers/soc/atmel/soc.c
new file mode 100644
index 000000000..dae8a2e0f
--- /dev/null
+++ b/drivers/soc/atmel/soc.c
@@ -0,0 +1,379 @@
+// 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, AT91_CIDR_MATCH_MASK,
+ AT91_CIDR_VERSION_MASK, SAM9X60_D5M_EXID_MATCH,
+ "sam9x60 64MiB DDR2 SiP", "sam9x60"),
+ AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
+ AT91_CIDR_VERSION_MASK, SAM9X60_D1G_EXID_MATCH,
+ "sam9x60 128MiB DDR2 SiP", "sam9x60"),
+ AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
+ AT91_CIDR_VERSION_MASK, SAM9X60_D6K_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);
diff --git a/drivers/soc/atmel/soc.h b/drivers/soc/atmel/soc.h
new file mode 100644
index 000000000..2ecaa75b0
--- /dev/null
+++ b/drivers/soc/atmel/soc.h
@@ -0,0 +1,139 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015 Atmel
+ *
+ * Boris Brezillon <boris.brezillon@free-electrons.com
+ */
+
+#ifndef __AT91_SOC_H
+#define __AT91_SOC_H
+
+#include <linux/sys_soc.h>
+
+struct at91_soc {
+ u32 cidr_match;
+ u32 cidr_mask;
+ u32 version_mask;
+ u32 exid_match;
+ const char *name;
+ const char *family;
+};
+
+#define AT91_SOC(__cidr, __cidr_mask, __version_mask, __exid, \
+ __name, __family) \
+ { \
+ .cidr_match = (__cidr), \
+ .cidr_mask = (__cidr_mask), \
+ .version_mask = (__version_mask), \
+ .exid_match = (__exid), \
+ .name = (__name), \
+ .family = (__family), \
+ }
+
+struct soc_device * __init
+at91_soc_init(const struct at91_soc *socs);
+
+#define AT91RM9200_CIDR_MATCH 0x09290780
+
+#define AT91SAM9260_CIDR_MATCH 0x019803a0
+#define AT91SAM9261_CIDR_MATCH 0x019703a0
+#define AT91SAM9263_CIDR_MATCH 0x019607a0
+#define AT91SAM9G20_CIDR_MATCH 0x019905a0
+#define AT91SAM9RL64_CIDR_MATCH 0x019b03a0
+#define AT91SAM9G45_CIDR_MATCH 0x019b05a0
+#define AT91SAM9X5_CIDR_MATCH 0x019a05a0
+#define AT91SAM9N12_CIDR_MATCH 0x019a07a0
+#define SAM9X60_CIDR_MATCH 0x019b35a0
+#define SAMA7G5_CIDR_MATCH 0x00162100
+
+#define AT91SAM9M11_EXID_MATCH 0x00000001
+#define AT91SAM9M10_EXID_MATCH 0x00000002
+#define AT91SAM9G46_EXID_MATCH 0x00000003
+#define AT91SAM9G45_EXID_MATCH 0x00000004
+
+#define AT91SAM9G15_EXID_MATCH 0x00000000
+#define AT91SAM9G35_EXID_MATCH 0x00000001
+#define AT91SAM9X35_EXID_MATCH 0x00000002
+#define AT91SAM9G25_EXID_MATCH 0x00000003
+#define AT91SAM9X25_EXID_MATCH 0x00000004
+
+#define AT91SAM9CN12_EXID_MATCH 0x00000005
+#define AT91SAM9N12_EXID_MATCH 0x00000006
+#define AT91SAM9CN11_EXID_MATCH 0x00000009
+
+#define SAM9X60_EXID_MATCH 0x00000000
+#define SAM9X60_D5M_EXID_MATCH 0x00000001
+#define SAM9X60_D1G_EXID_MATCH 0x00000010
+#define SAM9X60_D6K_EXID_MATCH 0x00000011
+
+#define SAMA7G51_EXID_MATCH 0x3
+#define SAMA7G52_EXID_MATCH 0x2
+#define SAMA7G53_EXID_MATCH 0x1
+#define SAMA7G54_EXID_MATCH 0x0
+
+#define AT91SAM9XE128_CIDR_MATCH 0x329973a0
+#define AT91SAM9XE256_CIDR_MATCH 0x329a93a0
+#define AT91SAM9XE512_CIDR_MATCH 0x329aa3a0
+
+#define SAMA5D2_CIDR_MATCH 0x0a5c08c0
+#define SAMA5D21CU_EXID_MATCH 0x0000005a
+#define SAMA5D225C_D1M_EXID_MATCH 0x00000053
+#define SAMA5D22CU_EXID_MATCH 0x00000059
+#define SAMA5D22CN_EXID_MATCH 0x00000069
+#define SAMA5D23CU_EXID_MATCH 0x00000058
+#define SAMA5D24CX_EXID_MATCH 0x00000004
+#define SAMA5D24CU_EXID_MATCH 0x00000014
+#define SAMA5D26CU_EXID_MATCH 0x00000012
+#define SAMA5D27C_D1G_EXID_MATCH 0x00000033
+#define SAMA5D27C_D5M_EXID_MATCH 0x00000032
+#define SAMA5D27C_LD1G_EXID_MATCH 0x00000061
+#define SAMA5D27C_LD2G_EXID_MATCH 0x00000062
+#define SAMA5D27CU_EXID_MATCH 0x00000011
+#define SAMA5D27CN_EXID_MATCH 0x00000021
+#define SAMA5D28C_D1G_EXID_MATCH 0x00000013
+#define SAMA5D28C_LD1G_EXID_MATCH 0x00000071
+#define SAMA5D28C_LD2G_EXID_MATCH 0x00000072
+#define SAMA5D28CU_EXID_MATCH 0x00000010
+#define SAMA5D28CN_EXID_MATCH 0x00000020
+#define SAMA5D29CN_EXID_MATCH 0x00000023
+
+#define SAMA5D3_CIDR_MATCH 0x0a5c07c0
+#define SAMA5D31_EXID_MATCH 0x00444300
+#define SAMA5D33_EXID_MATCH 0x00414300
+#define SAMA5D34_EXID_MATCH 0x00414301
+#define SAMA5D35_EXID_MATCH 0x00584300
+#define SAMA5D36_EXID_MATCH 0x00004301
+
+#define SAMA5D4_CIDR_MATCH 0x0a5c07c0
+#define SAMA5D41_EXID_MATCH 0x00000001
+#define SAMA5D42_EXID_MATCH 0x00000002
+#define SAMA5D43_EXID_MATCH 0x00000003
+#define SAMA5D44_EXID_MATCH 0x00000004
+
+#define SAME70Q21_CIDR_MATCH 0x21020e00
+#define SAME70Q21_EXID_MATCH 0x00000002
+#define SAME70Q20_CIDR_MATCH 0x21020c00
+#define SAME70Q20_EXID_MATCH 0x00000002
+#define SAME70Q19_CIDR_MATCH 0x210d0a00
+#define SAME70Q19_EXID_MATCH 0x00000002
+
+#define SAMS70Q21_CIDR_MATCH 0x21120e00
+#define SAMS70Q21_EXID_MATCH 0x00000002
+#define SAMS70Q20_CIDR_MATCH 0x21120c00
+#define SAMS70Q20_EXID_MATCH 0x00000002
+#define SAMS70Q19_CIDR_MATCH 0x211d0a00
+#define SAMS70Q19_EXID_MATCH 0x00000002
+
+#define SAMV71Q21_CIDR_MATCH 0x21220e00
+#define SAMV71Q21_EXID_MATCH 0x00000002
+#define SAMV71Q20_CIDR_MATCH 0x21220c00
+#define SAMV71Q20_EXID_MATCH 0x00000002
+#define SAMV71Q19_CIDR_MATCH 0x212d0a00
+#define SAMV71Q19_EXID_MATCH 0x00000002
+
+#define SAMV70Q20_CIDR_MATCH 0x21320c00
+#define SAMV70Q20_EXID_MATCH 0x00000002
+#define SAMV70Q19_CIDR_MATCH 0x213d0a00
+#define SAMV70Q19_EXID_MATCH 0x00000002
+
+#endif /* __AT91_SOC_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-03 19:54:52 +0000