diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bus/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/bus/Makefile | 1 | ||||
| -rw-r--r-- | drivers/bus/sun50i-de2.c | 48 | ||||
| -rw-r--r-- | drivers/soc/sunxi/sunxi_sram.c | 87 |
4 files changed, 144 insertions, 2 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index d1c0b60e9326..1851112ccc29 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -103,6 +103,16 @@ config SIMPLE_PM_BUS Controller (BSC, sometimes called "LBSC within Bus Bridge", or "External Bus Interface") as found on several Renesas ARM SoCs. +config SUN50I_DE2_BUS + bool "Allwinner A64 DE2 Bus Driver" + default ARM64 + depends on ARCH_SUNXI + select SUNXI_SRAM + help + Say y here to enable support for Allwinner A64 DE2 bus driver. It's + mostly transparent, but a SRAM region needs to be claimed in the SRAM + controller to make the all blocks in the DE2 part accessible. + config SUNXI_RSB tristate "Allwinner sunXi Reduced Serial Bus Driver" default MACH_SUN8I || MACH_SUN9I || ARM64 diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile index b8f036cca7ff..ca300b1914ce 100644 --- a/drivers/bus/Makefile +++ b/drivers/bus/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o obj-$(CONFIG_QCOM_EBI2) += qcom-ebi2.o +obj-$(CONFIG_SUN50I_DE2_BUS) += sun50i-de2.o obj-$(CONFIG_SUNXI_RSB) += sunxi-rsb.o obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o obj-$(CONFIG_TEGRA_ACONNECT) += tegra-aconnect.o diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c new file mode 100644 index 000000000000..672518741f86 --- /dev/null +++ b/drivers/bus/sun50i-de2.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Allwinner A64 Display Engine 2.0 Bus Driver + * + * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io> + */ + +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/soc/sunxi/sunxi_sram.h> + +static int sun50i_de2_bus_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + + ret = sunxi_sram_claim(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, "Error couldn't map SRAM to device\n"); + return ret; + } + + of_platform_populate(np, NULL, NULL, &pdev->dev); + + return 0; +} + +static int sun50i_de2_bus_remove(struct platform_device *pdev) +{ + sunxi_sram_release(&pdev->dev); + return 0; +} + +static const struct of_device_id sun50i_de2_bus_of_match[] = { + { .compatible = "allwinner,sun50i-a64-de2", }, + { /* sentinel */ } +}; + +static struct platform_driver sun50i_de2_bus_driver = { + .probe = sun50i_de2_bus_probe, + .remove = sun50i_de2_bus_remove, + .driver = { + .name = "sun50i-de2-bus", + .of_match_table = sun50i_de2_bus_of_match, + }, +}; + +builtin_platform_driver(sun50i_de2_bus_driver); diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 882be5ed7e84..b4b0f3480bd3 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -17,6 +17,7 @@ #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/soc/sunxi/sunxi_sram.h> @@ -63,6 +64,12 @@ static struct sunxi_sram_desc sun4i_a10_sram_a3_a4 = { SUNXI_SRAM_MAP(1, 1, "emac")), }; +static struct sunxi_sram_desc sun4i_a10_sram_c1 = { + .data = SUNXI_SRAM_DATA("C1", 0x0, 0x0, 31, + SUNXI_SRAM_MAP(0, 0, "cpu"), + SUNXI_SRAM_MAP(0x7fffffff, 1, "ve")), +}; + static struct sunxi_sram_desc sun4i_a10_sram_d = { .data = SUNXI_SRAM_DATA("D", 0x4, 0x0, 1, SUNXI_SRAM_MAP(0, 0, "cpu"), @@ -81,6 +88,10 @@ static const struct of_device_id sunxi_sram_dt_ids[] = { .data = &sun4i_a10_sram_a3_a4.data, }, { + .compatible = "allwinner,sun4i-a10-sram-c1", + .data = &sun4i_a10_sram_c1.data, + }, + { .compatible = "allwinner,sun4i-a10-sram-d", .data = &sun4i_a10_sram_d.data, }, @@ -281,13 +292,51 @@ int sunxi_sram_release(struct device *dev) } EXPORT_SYMBOL(sunxi_sram_release); +struct sunxi_sramc_variant { + bool has_emac_clock; +}; + +static const struct sunxi_sramc_variant sun4i_a10_sramc_variant = { + /* Nothing special */ +}; + +static const struct sunxi_sramc_variant sun50i_a64_sramc_variant = { + .has_emac_clock = true, +}; + +#define SUNXI_SRAM_EMAC_CLOCK_REG 0x30 +static bool sunxi_sram_regmap_accessible_reg(struct device *dev, + unsigned int reg) +{ + if (reg == SUNXI_SRAM_EMAC_CLOCK_REG) + return true; + return false; +} + +static struct regmap_config sunxi_sram_emac_clock_regmap = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + /* last defined register */ + .max_register = SUNXI_SRAM_EMAC_CLOCK_REG, + /* other devices have no business accessing other registers */ + .readable_reg = sunxi_sram_regmap_accessible_reg, + .writeable_reg = sunxi_sram_regmap_accessible_reg, +}; + static int sunxi_sram_probe(struct platform_device *pdev) { struct resource *res; struct dentry *d; + struct regmap *emac_clock; + const struct sunxi_sramc_variant *variant; sram_dev = &pdev->dev; + variant = of_device_get_match_data(&pdev->dev); + if (!variant) + return -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -300,12 +349,46 @@ static int sunxi_sram_probe(struct platform_device *pdev) if (!d) return -ENOMEM; + if (variant->has_emac_clock) { + emac_clock = devm_regmap_init_mmio(&pdev->dev, base, + &sunxi_sram_emac_clock_regmap); + + if (IS_ERR(emac_clock)) + return PTR_ERR(emac_clock); + } + return 0; } static const struct of_device_id sunxi_sram_dt_match[] = { - { .compatible = "allwinner,sun4i-a10-sram-controller" }, - { .compatible = "allwinner,sun50i-a64-sram-controller" }, + { + .compatible = "allwinner,sun4i-a10-sram-controller", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun4i-a10-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun5i-a13-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun8i-a23-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun8i-h3-system-control", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-a64-sram-controller", + .data = &sun50i_a64_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-a64-system-control", + .data = &sun50i_a64_sramc_variant, + }, { }, }; MODULE_DEVICE_TABLE(of, sunxi_sram_dt_match); 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