[PATCH V7 5/9] mfd: Add driver for NVIDIA Tegra XUSB
Andrew Bresticker
abrestic at chromium.org
Mon Apr 27 15:37:18 PDT 2015
Add an MFD driver for the XUSB host complex found on NVIDIA Tegra124
and later SoCs.
Signed-off-by: Andrew Bresticker <abrestic at chromium.org>
Cc: Samuel Ortiz <sameo at linux.intel.com>
Cc: Lee Jones <lee.jones at linaro.org>
---
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 at chromium.org>");
+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
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