389 lines
13 KiB
C
389 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2015 Atmel
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*
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* Alexandre Belloni <alexandre.belloni@free-electrons.com
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* Boris Brezillon <boris.brezillon@free-electrons.com
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*/
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#define pr_fmt(fmt) "AT91: " fmt
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <linux/sys_soc.h>
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#include "soc.h"
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#define AT91_DBGU_CIDR 0x40
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#define AT91_DBGU_EXID 0x44
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#define AT91_CHIPID_CIDR 0x00
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#define AT91_CHIPID_EXID 0x04
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#define AT91_CIDR_VERSION(x, m) ((x) & (m))
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#define AT91_CIDR_VERSION_MASK GENMASK(4, 0)
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#define AT91_CIDR_VERSION_MASK_SAMA7G5 GENMASK(3, 0)
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#define AT91_CIDR_EXT BIT(31)
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#define AT91_CIDR_MATCH_MASK GENMASK(30, 5)
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#define AT91_CIDR_MASK_SAMA7G5 GENMASK(27, 5)
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static const struct at91_soc socs[] __initconst = {
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#ifdef CONFIG_SOC_AT91RM9200
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AT91_SOC(AT91RM9200_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91rm9200 BGA", "at91rm9200"),
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#endif
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#ifdef CONFIG_SOC_AT91SAM9
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AT91_SOC(AT91SAM9260_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9260", NULL),
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AT91_SOC(AT91SAM9261_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9261", NULL),
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AT91_SOC(AT91SAM9263_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9263", NULL),
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AT91_SOC(AT91SAM9G20_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9g20", NULL),
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AT91_SOC(AT91SAM9RL64_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9rl64", NULL),
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AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9M11_EXID_MATCH,
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"at91sam9m11", "at91sam9g45"),
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AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9M10_EXID_MATCH,
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"at91sam9m10", "at91sam9g45"),
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AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9G46_EXID_MATCH,
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"at91sam9g46", "at91sam9g45"),
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AT91_SOC(AT91SAM9G45_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9G45_EXID_MATCH,
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"at91sam9g45", "at91sam9g45"),
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AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9G15_EXID_MATCH,
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"at91sam9g15", "at91sam9x5"),
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AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9G35_EXID_MATCH,
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"at91sam9g35", "at91sam9x5"),
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AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9X35_EXID_MATCH,
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"at91sam9x35", "at91sam9x5"),
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AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9G25_EXID_MATCH,
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"at91sam9g25", "at91sam9x5"),
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AT91_SOC(AT91SAM9X5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9X25_EXID_MATCH,
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"at91sam9x25", "at91sam9x5"),
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AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9CN12_EXID_MATCH,
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"at91sam9cn12", "at91sam9n12"),
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AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9N12_EXID_MATCH,
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"at91sam9n12", "at91sam9n12"),
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AT91_SOC(AT91SAM9N12_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, AT91SAM9CN11_EXID_MATCH,
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"at91sam9cn11", "at91sam9n12"),
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AT91_SOC(AT91SAM9XE128_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9xe128", "at91sam9xe128"),
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AT91_SOC(AT91SAM9XE256_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9xe256", "at91sam9xe256"),
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AT91_SOC(AT91SAM9XE512_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, 0, "at91sam9xe512", "at91sam9xe512"),
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#endif
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#ifdef CONFIG_SOC_SAM9X60
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AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAM9X60_EXID_MATCH,
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"sam9x60", "sam9x60"),
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AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAM9X60_D5M_EXID_MATCH,
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"sam9x60 64MiB DDR2 SiP", "sam9x60"),
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AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAM9X60_D1G_EXID_MATCH,
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"sam9x60 128MiB DDR2 SiP", "sam9x60"),
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AT91_SOC(SAM9X60_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAM9X60_D6K_EXID_MATCH,
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"sam9x60 8MiB SDRAM SiP", "sam9x60"),
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#endif
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#ifdef CONFIG_SOC_SAMA5
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D21CU_EXID_MATCH,
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"sama5d21", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D22CU_EXID_MATCH,
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"sama5d22", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D225C_D1M_EXID_MATCH,
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"sama5d225c 16MiB SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D23CU_EXID_MATCH,
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"sama5d23", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D24CX_EXID_MATCH,
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"sama5d24", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D24CU_EXID_MATCH,
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"sama5d24", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D26CU_EXID_MATCH,
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"sama5d26", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27CU_EXID_MATCH,
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"sama5d27", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27CN_EXID_MATCH,
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"sama5d27", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27C_D1G_EXID_MATCH,
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"sama5d27c 128MiB SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27C_D5M_EXID_MATCH,
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"sama5d27c 64MiB SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27C_LD1G_EXID_MATCH,
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"sama5d27c 128MiB LPDDR2 SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D27C_LD2G_EXID_MATCH,
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"sama5d27c 256MiB LPDDR2 SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D28CU_EXID_MATCH,
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"sama5d28", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D28CN_EXID_MATCH,
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"sama5d28", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D28C_D1G_EXID_MATCH,
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"sama5d28c 128MiB SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D28C_LD1G_EXID_MATCH,
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"sama5d28c 128MiB LPDDR2 SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D28C_LD2G_EXID_MATCH,
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"sama5d28c 256MiB LPDDR2 SiP", "sama5d2"),
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AT91_SOC(SAMA5D2_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D29CN_EXID_MATCH,
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"sama5d29", "sama5d2"),
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AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D31_EXID_MATCH,
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"sama5d31", "sama5d3"),
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AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D33_EXID_MATCH,
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"sama5d33", "sama5d3"),
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AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D34_EXID_MATCH,
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"sama5d34", "sama5d3"),
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AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D35_EXID_MATCH,
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"sama5d35", "sama5d3"),
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AT91_SOC(SAMA5D3_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D36_EXID_MATCH,
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"sama5d36", "sama5d3"),
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AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D41_EXID_MATCH,
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"sama5d41", "sama5d4"),
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AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D42_EXID_MATCH,
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"sama5d42", "sama5d4"),
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AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D43_EXID_MATCH,
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"sama5d43", "sama5d4"),
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AT91_SOC(SAMA5D4_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMA5D44_EXID_MATCH,
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"sama5d44", "sama5d4"),
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#endif
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#ifdef CONFIG_SOC_SAMV7
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AT91_SOC(SAME70Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAME70Q21_EXID_MATCH,
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"same70q21", "same7"),
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AT91_SOC(SAME70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAME70Q20_EXID_MATCH,
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"same70q20", "same7"),
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AT91_SOC(SAME70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAME70Q19_EXID_MATCH,
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"same70q19", "same7"),
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AT91_SOC(SAMS70Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMS70Q21_EXID_MATCH,
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"sams70q21", "sams7"),
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AT91_SOC(SAMS70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMS70Q20_EXID_MATCH,
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"sams70q20", "sams7"),
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AT91_SOC(SAMS70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMS70Q19_EXID_MATCH,
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"sams70q19", "sams7"),
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AT91_SOC(SAMV71Q21_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMV71Q21_EXID_MATCH,
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"samv71q21", "samv7"),
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AT91_SOC(SAMV71Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMV71Q20_EXID_MATCH,
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"samv71q20", "samv7"),
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AT91_SOC(SAMV71Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMV71Q19_EXID_MATCH,
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"samv71q19", "samv7"),
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AT91_SOC(SAMV70Q20_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMV70Q20_EXID_MATCH,
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"samv70q20", "samv7"),
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AT91_SOC(SAMV70Q19_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK, SAMV70Q19_EXID_MATCH,
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"samv70q19", "samv7"),
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#endif
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#ifdef CONFIG_SOC_SAMA7
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G51_EXID_MATCH,
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"sama7g51", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G52_EXID_MATCH,
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"sama7g52", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G53_EXID_MATCH,
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"sama7g53", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G54_EXID_MATCH,
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"sama7g54", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G54_D1G_EXID_MATCH,
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"SAMA7G54 1Gb DDR3L SiP", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G54_D2G_EXID_MATCH,
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"SAMA7G54 2Gb DDR3L SiP", "sama7g5"),
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AT91_SOC(SAMA7G5_CIDR_MATCH, AT91_CIDR_MATCH_MASK,
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AT91_CIDR_VERSION_MASK_SAMA7G5, SAMA7G54_D4G_EXID_MATCH,
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"SAMA7G54 4Gb DDR3L SiP", "sama7g5"),
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#endif
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{ /* sentinel */ },
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};
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static int __init at91_get_cidr_exid_from_dbgu(u32 *cidr, u32 *exid)
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{
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struct device_node *np;
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void __iomem *regs;
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np = of_find_compatible_node(NULL, NULL, "atmel,at91rm9200-dbgu");
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if (!np)
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np = of_find_compatible_node(NULL, NULL,
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"atmel,at91sam9260-dbgu");
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if (!np)
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return -ENODEV;
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regs = of_iomap(np, 0);
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of_node_put(np);
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if (!regs) {
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pr_warn("Could not map DBGU iomem range");
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return -ENXIO;
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}
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*cidr = readl(regs + AT91_DBGU_CIDR);
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*exid = readl(regs + AT91_DBGU_EXID);
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iounmap(regs);
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return 0;
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}
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static int __init at91_get_cidr_exid_from_chipid(u32 *cidr, u32 *exid)
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{
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struct device_node *np;
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void __iomem *regs;
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static const struct of_device_id chipids[] = {
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{ .compatible = "atmel,sama5d2-chipid" },
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{ .compatible = "microchip,sama7g5-chipid" },
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{ },
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};
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np = of_find_matching_node(NULL, chipids);
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if (!np)
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return -ENODEV;
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regs = of_iomap(np, 0);
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of_node_put(np);
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if (!regs) {
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pr_warn("Could not map DBGU iomem range");
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return -ENXIO;
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}
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*cidr = readl(regs + AT91_CHIPID_CIDR);
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*exid = readl(regs + AT91_CHIPID_EXID);
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iounmap(regs);
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return 0;
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}
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struct soc_device * __init at91_soc_init(const struct at91_soc *socs)
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{
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struct soc_device_attribute *soc_dev_attr;
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const struct at91_soc *soc;
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struct soc_device *soc_dev;
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u32 cidr, exid;
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int ret;
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/*
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* With SAMA5D2 and later SoCs, CIDR and EXID registers are no more
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* in the dbgu device but in the chipid device whose purpose is only
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* to expose these two registers.
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*/
|
|
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);
|