usb: musb: add support for JZ4740 usb device controller (10434d27) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/usb/musb/Kconfig

+7 −1

Original line number	Original line	Diff line number	Diff line
	@@ -93,6 +93,12 @@ config USB_MUSB_BLACKFIN
	config USB_MUSB_UX500		config USB_MUSB_UX500
	tristate "Ux500 platforms"		tristate "Ux500 platforms"

			config USB_MUSB_JZ4740
			tristate "JZ4740"
			depends on MACH_JZ4740 \|\| COMPILE_TEST
			depends on USB_MUSB_GADGET
			depends on USB_OTG_BLACKLIST_HUB

	endchoice		endchoice

	config USB_MUSB_AM335X_CHILD		config USB_MUSB_AM335X_CHILD
	@@ -100,7 +106,7 @@ config USB_MUSB_AM335X_CHILD

	choice		choice
	prompt 'MUSB DMA mode'		prompt 'MUSB DMA mode'
	default MUSB_PIO_ONLY if ARCH_MULTIPLATFORM		default MUSB_PIO_ONLY if ARCH_MULTIPLATFORM \|\| USB_MUSB_JZ4740
	default USB_UX500_DMA if USB_MUSB_UX500		default USB_UX500_DMA if USB_MUSB_UX500
	default USB_INVENTRA_DMA if USB_MUSB_OMAP2PLUS \|\| USB_MUSB_BLACKFIN		default USB_INVENTRA_DMA if USB_MUSB_OMAP2PLUS \|\| USB_MUSB_BLACKFIN
	default USB_TI_CPPI_DMA if USB_MUSB_DAVINCI		default USB_TI_CPPI_DMA if USB_MUSB_DAVINCI

drivers/usb/musb/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -19,6 +19,7 @@ obj-$(CONFIG_USB_MUSB_DAVINCI) += davinci.o
	obj-$(CONFIG_USB_MUSB_DA8XX) += da8xx.o		obj-$(CONFIG_USB_MUSB_DA8XX) += da8xx.o
	obj-$(CONFIG_USB_MUSB_BLACKFIN) += blackfin.o		obj-$(CONFIG_USB_MUSB_BLACKFIN) += blackfin.o
	obj-$(CONFIG_USB_MUSB_UX500) += ux500.o		obj-$(CONFIG_USB_MUSB_UX500) += ux500.o
			obj-$(CONFIG_USB_MUSB_JZ4740) += jz4740.o


	obj-$(CONFIG_USB_MUSB_AM335X_CHILD) += musb_am335x.o		obj-$(CONFIG_USB_MUSB_AM335X_CHILD) += musb_am335x.o

drivers/usb/musb/jz4740.c

0 → 100644

+201 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* Ingenic JZ4740 "glue layer"
			*
			* Copyright (C) 2013, Apelete Seketeli <apelete@seketeli.net>
			*
			* 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.
			*
			* 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/clk.h>
			#include <linux/dma-mapping.h>
			#include <linux/errno.h>
			#include <linux/kernel.h>
			#include <linux/module.h>
			#include <linux/platform_device.h>

			#include "musb_core.h"

			struct jz4740_glue {
			struct device *dev;
			struct platform_device *musb;
			struct clk *clk;
			};

			static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
			{
			unsigned long flags;
			irqreturn_t retval = IRQ_NONE;
			struct musb *musb = __hci;

			spin_lock_irqsave(&musb->lock, flags);

			musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
			musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
			musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);

			/*
			* The controller is gadget only, the state of the host mode IRQ bits is
			* undefined. Mask them to make sure that the musb driver core will
			* never see them set
			*/
			musb->int_usb &= MUSB_INTR_SUSPEND \| MUSB_INTR_RESUME \|
			MUSB_INTR_RESET \| MUSB_INTR_SOF;

			if (musb->int_usb \|\| musb->int_tx \|\| musb->int_rx)
			retval = musb_interrupt(musb);

			spin_unlock_irqrestore(&musb->lock, flags);

			return retval;
			}

			static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = {
			{ .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
			{ .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
			{ .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
			};

			static struct musb_hdrc_config jz4740_musb_config = {
			/* Silicon does not implement USB OTG. */
			.multipoint = 0,
			/* Max EPs scanned, driver will decide which EP can be used. */
			.num_eps = 4,
			/* RAMbits needed to configure EPs from table */
			.ram_bits = 9,
			.fifo_cfg = jz4740_musb_fifo_cfg,
			.fifo_cfg_size = ARRAY_SIZE(jz4740_musb_fifo_cfg),
			};

			static struct musb_hdrc_platform_data jz4740_musb_platform_data = {
			.mode = MUSB_PERIPHERAL,
			.config = &jz4740_musb_config,
			};

			static int jz4740_musb_init(struct musb *musb)
			{
			musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
			if (!musb->xceiv) {
			pr_err("HS UDC: no transceiver configured\n");
			return -ENODEV;
			}

			/* Silicon does not implement ConfigData register.
			* Set dyn_fifo to avoid reading EP config from hardware.
			*/
			musb->dyn_fifo = true;

			musb->isr = jz4740_musb_interrupt;

			return 0;
			}

			static int jz4740_musb_exit(struct musb *musb)
			{
			usb_put_phy(musb->xceiv);

			return 0;
			}

			static const struct musb_platform_ops jz4740_musb_ops = {
			.init = jz4740_musb_init,
			.exit = jz4740_musb_exit,
			};

			static int jz4740_probe(struct platform_device *pdev)
			{
			struct musb_hdrc_platform_data *pdata = &jz4740_musb_platform_data;
			struct platform_device *musb;
			struct jz4740_glue *glue;
			struct clk *clk;
			int ret;

			glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
			if (!glue)
			return -ENOMEM;

			musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
			if (!musb) {
			dev_err(&pdev->dev, "failed to allocate musb device\n");
			return -ENOMEM;
			}

			clk = devm_clk_get(&pdev->dev, "udc");
			if (IS_ERR(clk)) {
			dev_err(&pdev->dev, "failed to get clock\n");
			ret = PTR_ERR(clk);
			goto err_platform_device_put;
			}

			ret = clk_prepare_enable(clk);
			if (ret) {
			dev_err(&pdev->dev, "failed to enable clock\n");
			goto err_platform_device_put;
			}

			musb->dev.parent = &pdev->dev;

			glue->dev = &pdev->dev;
			glue->musb = musb;
			glue->clk = clk;

			pdata->platform_ops = &jz4740_musb_ops;

			platform_set_drvdata(pdev, glue);

			ret = platform_device_add_resources(musb, pdev->resource,
			pdev->num_resources);
			if (ret) {
			dev_err(&pdev->dev, "failed to add resources\n");
			goto err_clk_disable;
			}

			ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
			if (ret) {
			dev_err(&pdev->dev, "failed to add platform_data\n");
			goto err_clk_disable;
			}

			ret = platform_device_add(musb);
			if (ret) {
			dev_err(&pdev->dev, "failed to register musb device\n");
			goto err_clk_disable;
			}

			return 0;

			err_clk_disable:
			clk_disable_unprepare(clk);
			err_platform_device_put:
			platform_device_put(musb);
			return ret;
			}

			static int jz4740_remove(struct platform_device *pdev)
			{
			struct jz4740_glue *glue = platform_get_drvdata(pdev);

			platform_device_unregister(glue->musb);
			clk_disable_unprepare(glue->clk);

			return 0;
			}

			static struct platform_driver jz4740_driver = {
			.probe = jz4740_probe,
			.remove = jz4740_remove,
			.driver = {
			.name = "musb-jz4740",
			},
			};

			MODULE_DESCRIPTION("JZ4740 MUSB Glue Layer");
			MODULE_AUTHOR("Apelete Seketeli <apelete@seketeli.net>");
			MODULE_LICENSE("GPL v2");
			module_platform_driver(jz4740_driver);