This codes connects the CI13xxx driver with the core found inside of the Freescale i.MX244/i.MX28 CPU.
Signed-off-by: Marek Vasut <[email protected]> Cc: Alan Stern <[email protected]> Cc: Detlev Zundel <[email protected]> CC: Dong Aisheng <[email protected]> CC: Fabio Estevam <[email protected]> Cc: Felipe Balbi <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Linux ARM kernel <[email protected]> Cc: [email protected] CC: Sascha Hauer <[email protected]> CC: Shawn Guo <[email protected]> Cc: Stefano Babic <[email protected]> CC: Uwe Kleine-König <[email protected]> Cc: Wolfgang Denk <[email protected]> Cc: Wolfram Sang <[email protected]> --- drivers/usb/chipidea/Makefile | 4 + drivers/usb/chipidea/ci13xxx_mxs.c | 201 ++++++++++++++++++++++++++++++++++++ 2 files changed, 205 insertions(+) create mode 100644 drivers/usb/chipidea/ci13xxx_mxs.c diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile index cc34937..266d57d 100644 --- a/drivers/usb/chipidea/Makefile +++ b/drivers/usb/chipidea/Makefile @@ -12,3 +12,7 @@ endif ifneq ($(CONFIG_ARCH_MSM),) obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_msm.o endif + +ifneq ($(CONFIG_ARCH_MXS),) + obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_mxs.o +endif diff --git a/drivers/usb/chipidea/ci13xxx_mxs.c b/drivers/usb/chipidea/ci13xxx_mxs.c new file mode 100644 index 0000000..fcca90b --- /dev/null +++ b/drivers/usb/chipidea/ci13xxx_mxs.c @@ -0,0 +1,201 @@ +/* + * drivers/usb/chipidea/ci13xxx_mxs.c + * + * Freescale i.MX233/i.MX28 USB glue driver to CI13xxx core. + * + * Copyright (C) 2012 Marek Vasut <[email protected]> + * on behalf of DENX Software Engineering GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/clk.h> +#include <linux/dma-mapping.h> + +#include <linux/usb.h> +#include <linux/usb/chipidea.h> +#include <linux/usb/ch9.h> +#include <linux/usb/otg.h> +#include <linux/usb/gadget.h> +#include <linux/usb/hcd.h> +#include <linux/usb/ehci_def.h> + +#include <linux/usb/mxs-usb.h> + +#include "ci.h" + +static void ci13xxx_mxs_notify(struct ci13xxx *ci, unsigned event) +{ + uint32_t status; + struct usb_phy *phy; + struct mxs_ci13xxx_phy_notify notify; + + phy = usb_get_transceiver(); + if (!phy) + return; + + if (event != CI13XXX_CONTROLLER_HOST_IRQ_EVENT) + return; + + status = hw_read(ci, OP_USBSTS, ~0); + + notify.discon = status & STS_PCD; + + usb_phy_notify(phy, ¬ify); +} + +static struct ci13xxx_udc_driver ci13xxx_mxs_udc_driver = { + .name = "ci13xxx_mxs", + .flags = /*CI13XXX_REGS_SHARED |*/ + CI13XXX_REQUIRE_TRANSCEIVER | + CI13XXX_PULLUP_ON_VBUS | + CI13XXX_DISABLE_STREAMING, + .capoffset = 0x100, + .notify_event = ci13xxx_mxs_notify, +}; + +struct ci13xxx_mxs_data { + struct clk *clk; + struct platform_device *pdev; +}; + +static int __devinit ci13xxx_mxs_probe(struct platform_device *pdev) +{ + struct ci13xxx_mxs_data *data; + int ret; + struct usb_phy *phy; + + phy = usb_get_transceiver(); + if (!phy) + return -EPROBE_DEFER; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) { + dev_err(&pdev->dev, "Failed to allocate CI13xxx-MXS data!\n"); + return -ENOMEM; + } + + ret = usb_phy_init(phy); + if (ret) { + dev_err(&pdev->dev, "Failed to initialize PHY!\n"); + return -EINVAL; + } + + data->pdev = platform_device_alloc("ci_hdrc", -1); + if (!data->pdev) { + dev_err(&pdev->dev, + "Failed to allocate ci_hdrc platform device!\n"); + ret = -ENOMEM; + goto put_phy; + } + + /* Add DMA mask */ + data->pdev->dev.dma_mask = devm_kzalloc(&pdev->dev, + sizeof(*data->pdev->dev.dma_mask), + GFP_KERNEL); + if (!data->pdev->dev.dma_mask) { + ret = -ENOMEM; + goto put_platform; + } + + *data->pdev->dev.dma_mask = DMA_BIT_MASK(32); + data->pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); + + ret = platform_device_add_resources(data->pdev, pdev->resource, + pdev->num_resources); + if (ret) { + dev_err(&pdev->dev, + "Failed to add resources to platform device!\n"); + goto put_platform; + } + + ret = platform_device_add_data(data->pdev, &ci13xxx_mxs_udc_driver, + sizeof(ci13xxx_mxs_udc_driver)); + if (ret) { + dev_err(&pdev->dev, + "Failed to add platform data to platform device!\n"); + goto put_platform; + } + + /* Claim the Host clock. */ + data->clk = clk_get(&pdev->dev, "usb"); + if (IS_ERR(data->clk)) { + dev_err(&pdev->dev, "Failed to claim clock for USB Host\n"); + ret = PTR_ERR(data->clk); + goto put_platform; + } + + /* Prepare Host clock. */ + ret = clk_prepare_enable(data->clk); + if (ret) { + dev_err(&pdev->dev, "Failed to enable clock for USB Host.\n"); + goto put_clk; + } + + ret = platform_device_add(data->pdev); + if (ret) + goto put_clk; + + dev_set_drvdata(&pdev->dev, data); + + pm_runtime_no_callbacks(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + return 0; + +put_clk: + clk_put(data->clk); +put_platform: + platform_device_put(data->pdev); +put_phy: + usb_phy_shutdown(phy); + return ret; +} + +static int __devexit ci13xxx_mxs_remove(struct platform_device *pdev) +{ + struct ci13xxx_mxs_data *data = dev_get_drvdata(&pdev->dev); + struct usb_phy *phy = usb_get_transceiver(); + + clk_disable_unprepare(data->clk); + clk_put(data->clk); + + if (phy) + usb_phy_shutdown(phy); + + platform_device_del(data->pdev); + platform_device_put(data->pdev); + + return 0; +} + +static struct platform_driver ci13xxx_mxs_driver = { + .probe = ci13xxx_mxs_probe, + .remove = __devexit_p(ci13xxx_mxs_remove), + .driver = { + .name = "mxs-usb", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(ci13xxx_mxs_driver); + +MODULE_ALIAS("platform:mxs-usb"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("CI13xxx MXS USB binding"); +MODULE_AUTHOR("Marek Vasut <[email protected]>"); -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
