Add an MFD driver for the XUSB host complex found on NVIDIA Tegra124 and later SoCs. Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx> Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx> Cc: Lee Jones <lee.jones@xxxxxxxxxx> --- New for v7. --- drivers/mfd/Kconfig | 7 ++ drivers/mfd/Makefile | 1 + drivers/mfd/tegra-xusb.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++ include/soc/tegra/xusb.h | 19 ++++++ 4 files changed, 194 insertions(+) create mode 100644 drivers/mfd/tegra-xusb.c create mode 100644 include/soc/tegra/xusb.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index d5ad04d..61872b4 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1430,6 +1430,13 @@ config MFD_STW481X in various ST Microelectronics and ST-Ericsson embedded Nomadik series. +config MFD_TEGRA_XUSB + tristate "NVIDIA Tegra XUSB" + depends on ARCH_TEGRA + select MFD_CORE + help + Support for the XUSB complex found on NVIDIA Tegra124 and later SoCs. + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 0e5cfeb..7588caf 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -181,6 +181,7 @@ obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o obj-$(CONFIG_MFD_DLN2) += dln2.o obj-$(CONFIG_MFD_RT5033) += rt5033.o obj-$(CONFIG_MFD_SKY81452) += sky81452.o +obj-$(CONFIG_MFD_TEGRA_XUSB) += tegra-xusb.o intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o diff --git a/drivers/mfd/tegra-xusb.c b/drivers/mfd/tegra-xusb.c new file mode 100644 index 0000000..d30d259 --- /dev/null +++ b/drivers/mfd/tegra-xusb.c @@ -0,0 +1,167 @@ +/* + * NVIDIA Tegra XUSB MFD driver + * + * Copyright (C) 2015 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mfd/core.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include <soc/tegra/xusb.h> + +struct tegra_xusb_soc_data { + struct mfd_cell *devs; + unsigned int num_devs; +}; + +static struct resource tegra_xhci_resources[] = { + { + .name = "host", + .flags = IORESOURCE_IRQ, + }, + { + .name = "xhci", + .flags = IORESOURCE_MEM, + }, + { + .name = "ipfs", + .flags = IORESOURCE_MEM, + }, +}; + +static struct resource tegra_xusb_mbox_resources[] = { + { + .name = "smi", + .flags = IORESOURCE_IRQ, + }, +}; + +static struct mfd_cell tegra124_xusb_devs[] = { + { + .name = "tegra-xhci", + .of_compatible = "nvidia,tegra124-xhci", + }, + { + .name = "tegra-xusb-mbox", + .of_compatible = "nvidia,tegra124-xusb-mbox", + }, +}; + +static const struct tegra_xusb_soc_data tegra124_xusb_data = { + .devs = tegra124_xusb_devs, + .num_devs = ARRAY_SIZE(tegra124_xusb_devs), +}; + +static const struct of_device_id tegra_xusb_of_match[] = { + { .compatible = "nvidia,tegra124-xusb", .data = &tegra124_xusb_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, tegra_xusb_of_match); + +static struct regmap_config tegra_fpci_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int tegra_xusb_probe(struct platform_device *pdev) +{ + const struct tegra_xusb_soc_data *soc; + const struct of_device_id *match; + struct tegra_xusb *xusb; + struct resource *res; + void __iomem *fpci_base; + int irq, ret; + + xusb = devm_kzalloc(&pdev->dev, sizeof(*xusb), GFP_KERNEL); + if (!xusb) + return -ENOMEM; + platform_set_drvdata(pdev, xusb); + + match = of_match_node(tegra_xusb_of_match, pdev->dev.of_node); + soc = match->data; + + irq = platform_get_irq_byname(pdev, "host"); + if (irq < 0) + return irq; + tegra_xhci_resources[0].start = irq; + tegra_xhci_resources[0].end = irq; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci"); + if (!res) + return -ENODEV; + tegra_xhci_resources[1].start = res->start; + tegra_xhci_resources[1].end = res->end; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ipfs"); + if (!res) + return -ENODEV; + tegra_xhci_resources[2].start = res->start; + tegra_xhci_resources[2].end = res->end; + + soc->devs[0].resources = tegra_xhci_resources; + soc->devs[0].num_resources = ARRAY_SIZE(tegra_xhci_resources); + + irq = platform_get_irq_byname(pdev, "smi"); + if (irq < 0) + return irq; + tegra_xusb_mbox_resources[0].start = irq; + tegra_xusb_mbox_resources[0].end = irq; + + soc->devs[1].resources = tegra_xusb_mbox_resources; + soc->devs[1].num_resources = ARRAY_SIZE(tegra_xusb_mbox_resources); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fpci"); + fpci_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(fpci_base)) + return PTR_ERR(fpci_base); + + tegra_fpci_regmap_config.max_register = res->end - res->start - 3; + xusb->fpci_regs = devm_regmap_init_mmio(&pdev->dev, fpci_base, + &tegra_fpci_regmap_config); + if (IS_ERR(xusb->fpci_regs)) { + ret = PTR_ERR(xusb->fpci_regs); + dev_err(&pdev->dev, "Failed to init regmap: %d\n", ret); + return ret; + } + + ret = mfd_add_devices(&pdev->dev, -1, soc->devs, soc->num_devs, + NULL, 0, NULL); + if (ret) { + dev_err(&pdev->dev, "Failed to add MFD devices: %d\n", ret); + return ret; + } + + return 0; +} + +static int tegra_xusb_remove(struct platform_device *pdev) +{ + mfd_remove_devices(&pdev->dev); + + return 0; +} + +static struct platform_driver tegra_xusb_driver = { + .probe = tegra_xusb_probe, + .remove = tegra_xusb_remove, + .driver = { + .name = "tegra-xusb", + .of_match_table = tegra_xusb_of_match, + }, +}; +module_platform_driver(tegra_xusb_driver); + +MODULE_DESCRIPTION("NVIDIA Tegra XUSB MFD"); +MODULE_AUTHOR("Andrew Bresticker <abrestic@xxxxxxxxxxxx>"); +MODULE_LICENSE("GPL v2"); diff --git a/include/soc/tegra/xusb.h b/include/soc/tegra/xusb.h new file mode 100644 index 0000000..9d28d90 --- /dev/null +++ b/include/soc/tegra/xusb.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 2014 NVIDIA Corporation + * Copyright (C) 2014 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#ifndef __SOC_TEGRA_XUSB_H__ +#define __SOC_TEGRA_XUSB_H__ + +struct regmap; + +struct tegra_xusb { + struct regmap *fpci_regs; +}; + +#endif /* __SOC_TEGRA_XUSB_H__ */ -- 2.2.0.rc0.207.ga3a616c -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html