diff options
Diffstat (limited to 'drivers/soc/atmel')
| -rw-r--r-- | drivers/soc/atmel/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/soc/atmel/Makefile | 1 | ||||
| -rw-r--r-- | drivers/soc/atmel/soc.c | 231 | ||||
| -rw-r--r-- | drivers/soc/atmel/soc.h | 91 |
4 files changed, 329 insertions, 0 deletions
diff --git a/drivers/soc/atmel/Kconfig b/drivers/soc/atmel/Kconfig new file mode 100644 index 000000000000..6242ebb41abb --- /dev/null +++ b/drivers/soc/atmel/Kconfig @@ -0,0 +1,6 @@ +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. diff --git a/drivers/soc/atmel/Makefile b/drivers/soc/atmel/Makefile new file mode 100644 index 000000000000..2d92f32e4ea5 --- /dev/null +++ b/drivers/soc/atmel/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_AT91_SOC_ID) += soc.o diff --git a/drivers/soc/atmel/soc.c b/drivers/soc/atmel/soc.c new file mode 100644 index 000000000000..4790094b498e --- /dev/null +++ b/drivers/soc/atmel/soc.c @@ -0,0 +1,231 @@ +/* + * Copyright (C) 2015 Atmel + * + * Alexandre Belloni <alexandre.belloni@free-electrons.com + * Boris Brezillon <boris.brezillon@free-electrons.com + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + */ + +#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) ((x) & 0x1f) +#define AT91_CIDR_EXT BIT(31) +#define AT91_CIDR_MATCH_MASK 0x7fffffe0 + +static const struct at91_soc __initconst socs[] = { +#ifdef CONFIG_SOC_AT91RM9200 + AT91_SOC(AT91RM9200_CIDR_MATCH, 0, "at91rm9200 BGA", "at91rm9200"), +#endif +#ifdef CONFIG_SOC_AT91SAM9 + AT91_SOC(AT91SAM9260_CIDR_MATCH, 0, "at91sam9260", NULL), + AT91_SOC(AT91SAM9261_CIDR_MATCH, 0, "at91sam9261", NULL), + AT91_SOC(AT91SAM9263_CIDR_MATCH, 0, "at91sam9263", NULL), + AT91_SOC(AT91SAM9G20_CIDR_MATCH, 0, "at91sam9g20", NULL), + AT91_SOC(AT91SAM9RL64_CIDR_MATCH, 0, "at91sam9rl64", NULL), + AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M11_EXID_MATCH, + "at91sam9m11", "at91sam9g45"), + AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9M10_EXID_MATCH, + "at91sam9m10", "at91sam9g45"), + AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G46_EXID_MATCH, + "at91sam9g46", "at91sam9g45"), + AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91SAM9G45_EXID_MATCH, + "at91sam9g45", "at91sam9g45"), + AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G15_EXID_MATCH, + "at91sam9g15", "at91sam9x5"), + AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G35_EXID_MATCH, + "at91sam9g35", "at91sam9x5"), + AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X35_EXID_MATCH, + "at91sam9x35", "at91sam9x5"), + AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9G25_EXID_MATCH, + "at91sam9g25", "at91sam9x5"), + AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91SAM9X25_EXID_MATCH, + "at91sam9x25", "at91sam9x5"), + AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN12_EXID_MATCH, + "at91sam9cn12", "at91sam9n12"), + AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9N12_EXID_MATCH, + "at91sam9n12", "at91sam9n12"), + AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91SAM9CN11_EXID_MATCH, + "at91sam9cn11", "at91sam9n12"), + AT91_SOC(AT91SAM9XE128_CIDR_MATCH, 0, "at91sam9xe128", "at91sam9xe128"), + AT91_SOC(AT91SAM9XE256_CIDR_MATCH, 0, "at91sam9xe256", "at91sam9xe256"), + AT91_SOC(AT91SAM9XE512_CIDR_MATCH, 0, "at91sam9xe512", "at91sam9xe512"), +#endif +#ifdef CONFIG_SOC_SAMA5 + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D21CU_EXID_MATCH, + "sama5d21", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D22CU_EXID_MATCH, + "sama5d22", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D23CU_EXID_MATCH, + "sama5d23", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CX_EXID_MATCH, + "sama5d24", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D24CU_EXID_MATCH, + "sama5d24", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D26CU_EXID_MATCH, + "sama5d26", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CU_EXID_MATCH, + "sama5d27", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D27CN_EXID_MATCH, + "sama5d27", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CU_EXID_MATCH, + "sama5d28", "sama5d2"), + AT91_SOC(SAMA5D2_CIDR_MATCH, SAMA5D28CN_EXID_MATCH, + "sama5d28", "sama5d2"), + AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D31_EXID_MATCH, + "sama5d31", "sama5d3"), + AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D33_EXID_MATCH, + "sama5d33", "sama5d3"), + AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D34_EXID_MATCH, + "sama5d34", "sama5d3"), + AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D35_EXID_MATCH, + "sama5d35", "sama5d3"), + AT91_SOC(SAMA5D3_CIDR_MATCH, SAMA5D36_EXID_MATCH, + "sama5d36", "sama5d3"), + AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D41_EXID_MATCH, + "sama5d41", "sama5d4"), + AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D42_EXID_MATCH, + "sama5d42", "sama5d4"), + AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D43_EXID_MATCH, + "sama5d43", "sama5d4"), + AT91_SOC(SAMA5D4_CIDR_MATCH, SAMA5D44_EXID_MATCH, + "sama5d44", "sama5d4"), +#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; + + np = of_find_compatible_node(NULL, NULL, "atmel,sama5d2-chipid"); + 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 & AT91_CIDR_MATCH_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_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)); + + return soc_dev; +} + +static int __init atmel_soc_device_init(void) +{ + 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 000000000000..228efded5085 --- /dev/null +++ b/drivers/soc/atmel/soc.h @@ -0,0 +1,91 @@ +/* + * Copyright (C) 2015 Atmel + * + * Boris Brezillon <boris.brezillon@free-electrons.com + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + */ + +#ifndef __AT91_SOC_H +#define __AT91_SOC_H + +#include <linux/sys_soc.h> + +struct at91_soc { + u32 cidr_match; + u32 exid_match; + const char *name; + const char *family; +}; + +#define AT91_SOC(__cidr, __exid, __name, __family) \ + { \ + .cidr_match = (__cidr), \ + .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 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 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 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 SAMA5D27CU_EXID_MATCH 0x00000011 +#define SAMA5D27CN_EXID_MATCH 0x00000021 +#define SAMA5D28CU_EXID_MATCH 0x00000010 +#define SAMA5D28CN_EXID_MATCH 0x00000020 + +#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 + +#endif /* __AT91_SOC_H */ |