diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/usb/dwc3/dwc3-exynos.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/usb/dwc3/dwc3-exynos.c')
-rw-r--r-- | kernel/drivers/usb/dwc3/dwc3-exynos.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/kernel/drivers/usb/dwc3/dwc3-exynos.c b/kernel/drivers/usb/dwc3/dwc3-exynos.c new file mode 100644 index 000000000..7bd0a95b2 --- /dev/null +++ b/kernel/drivers/usb/dwc3/dwc3-exynos.c @@ -0,0 +1,301 @@ +/** + * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Anton Tikhomirov <av.tikhomirov@samsung.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/clk.h> +#include <linux/usb/otg.h> +#include <linux/usb/usb_phy_generic.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/regulator/consumer.h> + +struct dwc3_exynos { + struct platform_device *usb2_phy; + struct platform_device *usb3_phy; + struct device *dev; + + struct clk *clk; + struct clk *susp_clk; + struct clk *axius_clk; + + struct regulator *vdd33; + struct regulator *vdd10; +}; + +static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos) +{ + struct usb_phy_generic_platform_data pdata; + struct platform_device *pdev; + int ret; + + memset(&pdata, 0x00, sizeof(pdata)); + + pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO); + if (!pdev) + return -ENOMEM; + + exynos->usb2_phy = pdev; + pdata.type = USB_PHY_TYPE_USB2; + pdata.gpio_reset = -1; + + ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata)); + if (ret) + goto err1; + + pdev = platform_device_alloc("usb_phy_generic", PLATFORM_DEVID_AUTO); + if (!pdev) { + ret = -ENOMEM; + goto err1; + } + + exynos->usb3_phy = pdev; + pdata.type = USB_PHY_TYPE_USB3; + + ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata)); + if (ret) + goto err2; + + ret = platform_device_add(exynos->usb2_phy); + if (ret) + goto err2; + + ret = platform_device_add(exynos->usb3_phy); + if (ret) + goto err3; + + return 0; + +err3: + platform_device_del(exynos->usb2_phy); + +err2: + platform_device_put(exynos->usb3_phy); + +err1: + platform_device_put(exynos->usb2_phy); + + return ret; +} + +static int dwc3_exynos_remove_child(struct device *dev, void *unused) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int dwc3_exynos_probe(struct platform_device *pdev) +{ + struct dwc3_exynos *exynos; + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + + int ret; + + exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL); + if (!exynos) + return -ENOMEM; + + /* + * Right now device-tree probed devices don't get dma_mask set. + * Since shared usb code relies on it, set it here for now. + * Once we move to full device tree support this will vanish off. + */ + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) + return ret; + + platform_set_drvdata(pdev, exynos); + + ret = dwc3_exynos_register_phys(exynos); + if (ret) { + dev_err(dev, "couldn't register PHYs\n"); + return ret; + } + + exynos->dev = dev; + + exynos->clk = devm_clk_get(dev, "usbdrd30"); + if (IS_ERR(exynos->clk)) { + dev_err(dev, "couldn't get clock\n"); + return -EINVAL; + } + clk_prepare_enable(exynos->clk); + + exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk"); + if (IS_ERR(exynos->susp_clk)) { + dev_dbg(dev, "no suspend clk specified\n"); + exynos->susp_clk = NULL; + } + clk_prepare_enable(exynos->susp_clk); + + if (of_device_is_compatible(node, "samsung,exynos7-dwusb3")) { + exynos->axius_clk = devm_clk_get(dev, "usbdrd30_axius_clk"); + if (IS_ERR(exynos->axius_clk)) { + dev_err(dev, "no AXI UpScaler clk specified\n"); + return -ENODEV; + } + clk_prepare_enable(exynos->axius_clk); + } else { + exynos->axius_clk = NULL; + } + + exynos->vdd33 = devm_regulator_get(dev, "vdd33"); + if (IS_ERR(exynos->vdd33)) { + ret = PTR_ERR(exynos->vdd33); + goto err2; + } + ret = regulator_enable(exynos->vdd33); + if (ret) { + dev_err(dev, "Failed to enable VDD33 supply\n"); + goto err2; + } + + exynos->vdd10 = devm_regulator_get(dev, "vdd10"); + if (IS_ERR(exynos->vdd10)) { + ret = PTR_ERR(exynos->vdd10); + goto err3; + } + ret = regulator_enable(exynos->vdd10); + if (ret) { + dev_err(dev, "Failed to enable VDD10 supply\n"); + goto err3; + } + + if (node) { + ret = of_platform_populate(node, NULL, NULL, dev); + if (ret) { + dev_err(dev, "failed to add dwc3 core\n"); + goto err4; + } + } else { + dev_err(dev, "no device node, failed to add dwc3 core\n"); + ret = -ENODEV; + goto err4; + } + + return 0; + +err4: + regulator_disable(exynos->vdd10); +err3: + regulator_disable(exynos->vdd33); +err2: + clk_disable_unprepare(exynos->axius_clk); + clk_disable_unprepare(exynos->susp_clk); + clk_disable_unprepare(exynos->clk); + return ret; +} + +static int dwc3_exynos_remove(struct platform_device *pdev) +{ + struct dwc3_exynos *exynos = platform_get_drvdata(pdev); + + device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child); + platform_device_unregister(exynos->usb2_phy); + platform_device_unregister(exynos->usb3_phy); + + clk_disable_unprepare(exynos->axius_clk); + clk_disable_unprepare(exynos->susp_clk); + clk_disable_unprepare(exynos->clk); + + regulator_disable(exynos->vdd33); + regulator_disable(exynos->vdd10); + + return 0; +} + +static const struct of_device_id exynos_dwc3_match[] = { + { .compatible = "samsung,exynos5250-dwusb3" }, + { .compatible = "samsung,exynos7-dwusb3" }, + {}, +}; +MODULE_DEVICE_TABLE(of, exynos_dwc3_match); + +#ifdef CONFIG_PM_SLEEP +static int dwc3_exynos_suspend(struct device *dev) +{ + struct dwc3_exynos *exynos = dev_get_drvdata(dev); + + clk_disable(exynos->axius_clk); + clk_disable(exynos->clk); + + regulator_disable(exynos->vdd33); + regulator_disable(exynos->vdd10); + + return 0; +} + +static int dwc3_exynos_resume(struct device *dev) +{ + struct dwc3_exynos *exynos = dev_get_drvdata(dev); + int ret; + + ret = regulator_enable(exynos->vdd33); + if (ret) { + dev_err(dev, "Failed to enable VDD33 supply\n"); + return ret; + } + ret = regulator_enable(exynos->vdd10); + if (ret) { + dev_err(dev, "Failed to enable VDD10 supply\n"); + return ret; + } + + clk_enable(exynos->clk); + clk_enable(exynos->axius_clk); + + /* runtime set active to reflect active state. */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + return 0; +} + +static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume) +}; + +#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +static struct platform_driver dwc3_exynos_driver = { + .probe = dwc3_exynos_probe, + .remove = dwc3_exynos_remove, + .driver = { + .name = "exynos-dwc3", + .of_match_table = exynos_dwc3_match, + .pm = DEV_PM_OPS, + }, +}; + +module_platform_driver(dwc3_exynos_driver); + +MODULE_ALIAS("platform:exynos-dwc3"); +MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer"); |