diff options
Diffstat (limited to 'meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch')
| -rw-r--r-- | meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch new file mode 100644 index 0000000000..67004d7ec6 --- /dev/null +++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch @@ -0,0 +1,259 @@ +From de835357b3597af5304742cbd89771d70533292a Mon Sep 17 00:00:00 2001 +From: Ajay Kumar Gupta <ajay.gupta@ti.com> +Date: Fri, 6 Feb 2009 17:32:35 +0530 +Subject: [PATCH] USB: otg: adding nop usb transceiver + +NOP transceiver is used by all the usb transceiver which are mostly +autonomous and doesn't require any programming or which are built +into the usb ip itself.NOP transceiver only allocates the memory +for struct xceiv and calls otg_set_transceiver() so function call +to otg_get_transceiver() will return a valid transceiver. + +NOP transceiver device should be registered by calling +usb_nop_xceiv_register() from platform files. + +Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com> +Cc: Felipe Balbi <felipe.balbi@nokia.com> +Cc: David Brownell <dbrownell@users.sourceforge.net> +Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> +--- + drivers/usb/otg/Kconfig | 8 ++ + drivers/usb/otg/Makefile | 1 + + drivers/usb/otg/nop-usb-xceiv.c | 180 +++++++++++++++++++++++++++++++++++++++ + include/linux/usb/otg.h | 4 + + 4 files changed, 193 insertions(+), 0 deletions(-) + create mode 100644 drivers/usb/otg/nop-usb-xceiv.c + +diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig +index 5790a5b..aa884d0 100644 +--- a/drivers/usb/otg/Kconfig ++++ b/drivers/usb/otg/Kconfig +@@ -51,4 +51,12 @@ config TWL4030_USB + This transceiver supports high and full speed devices plus, + in host mode, low speed. + ++config NOP_USB_XCEIV ++ tristate "NOP USB Transceiver Driver" ++ select USB_OTG_UTILS ++ help ++ this driver is to be used by all the usb transceiver which are either ++ built-in with usb ip or which are autonomous and doesn't require any ++ phy programming such as ISP1x04 etc. ++ + endif # USB || OTG +diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile +index d73c7cf..2081678 100644 +--- a/drivers/usb/otg/Makefile ++++ b/drivers/usb/otg/Makefile +@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_OTG_UTILS) += otg.o + obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o + obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o + obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o ++obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o + + ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG + ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG +diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c +new file mode 100644 +index 0000000..4b933f6 +--- /dev/null ++++ b/drivers/usb/otg/nop-usb-xceiv.c +@@ -0,0 +1,180 @@ ++/* ++ * drivers/usb/otg/nop-usb-xceiv.c ++ * ++ * NOP USB transceiver for all USB transceiver which are either built-in ++ * into USB IP or which are mostly autonomous. ++ * ++ * Copyright (C) 2009 Texas Instruments Inc ++ * Author: Ajay Kumar Gupta <ajay.gupta@ti.com> ++ * ++ * 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. ++ * ++ * Current status: ++ * this is to add "nop" transceiver for all those phy which is ++ * autonomous such as isp1504 etc. ++ */ ++ ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/dma-mapping.h> ++#include <linux/usb/otg.h> ++ ++struct nop_usb_xceiv { ++ struct otg_transceiver otg; ++ struct device *dev; ++}; ++ ++static u64 nop_xceiv_dmamask = DMA_32BIT_MASK; ++ ++static struct platform_device nop_xceiv_device = { ++ .name = "nop_usb_xceiv", ++ .id = -1, ++ .dev = { ++ .dma_mask = &nop_xceiv_dmamask, ++ .coherent_dma_mask = DMA_32BIT_MASK, ++ .platform_data = NULL, ++ }, ++}; ++ ++void usb_nop_xceiv_register(void) ++{ ++ if (platform_device_register(&nop_xceiv_device) < 0) { ++ printk(KERN_ERR "Unable to register usb nop transceiver\n"); ++ return; ++ } ++} ++ ++void usb_nop_xceiv_unregister(void) ++{ ++ platform_device_unregister(&nop_xceiv_device); ++} ++ ++static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x) ++{ ++ return container_of(x, struct nop_usb_xceiv, otg); ++} ++ ++static int nop_set_suspend(struct otg_transceiver *x, int suspend) ++{ ++ return 0; ++} ++ ++static int nop_set_peripheral(struct otg_transceiver *x, ++ struct usb_gadget *gadget) ++{ ++ struct nop_usb_xceiv *nop; ++ ++ if (!x) ++ return -ENODEV; ++ ++ nop = xceiv_to_nop(x); ++ ++ if (!gadget) { ++ nop->otg.gadget = NULL; ++ return -ENODEV; ++ } ++ ++ nop->otg.gadget = gadget; ++ nop->otg.state = OTG_STATE_B_IDLE; ++ return 0; ++} ++ ++static int nop_set_host(struct otg_transceiver *x, struct usb_bus *host) ++{ ++ struct nop_usb_xceiv *nop; ++ ++ if (!x) ++ return -ENODEV; ++ ++ nop = xceiv_to_nop(x); ++ ++ if (!host) { ++ nop->otg.host = NULL; ++ return -ENODEV; ++ } ++ ++ nop->otg.host = host; ++ return 0; ++} ++ ++static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev) ++{ ++ struct nop_usb_xceiv *nop; ++ int err; ++ ++ nop = kzalloc(sizeof *nop, GFP_KERNEL); ++ if (!nop) ++ return -ENOMEM; ++ ++ nop->dev = &pdev->dev; ++ nop->otg.dev = nop->dev; ++ nop->otg.label = "nop-xceiv"; ++ nop->otg.state = OTG_STATE_UNDEFINED; ++ nop->otg.set_host = nop_set_host; ++ nop->otg.set_peripheral = nop_set_peripheral; ++ nop->otg.set_suspend = nop_set_suspend; ++ ++ err = otg_set_transceiver(&nop->otg); ++ if (err) { ++ dev_err(&pdev->dev, "can't register transceiver, err: %d\n", ++ err); ++ goto exit; ++ } ++ ++ platform_set_drvdata(pdev, nop); ++ ++ return 0; ++exit: ++ kfree(nop); ++ return err; ++} ++ ++static int __devexit nop_usb_xceiv_remove(struct platform_device *pdev) ++{ ++ struct nop_usb_xceiv *nop = platform_get_drvdata(pdev); ++ ++ otg_set_transceiver(NULL); ++ ++ platform_set_drvdata(pdev, NULL); ++ kfree(nop); ++ ++ return 0; ++} ++ ++static struct platform_driver nop_usb_xceiv_driver = { ++ .probe = nop_usb_xceiv_probe, ++ .remove = __devexit_p(nop_usb_xceiv_remove), ++ .driver = { ++ .name = "nop_usb_xceiv", ++ .owner = THIS_MODULE, ++ }, ++}; ++ ++static int __init nop_usb_xceiv_init(void) ++{ ++ return platform_driver_register(&nop_usb_xceiv_driver); ++} ++subsys_initcall(nop_usb_xceiv_init); ++ ++static void __exit nop_usb_xceiv_exit(void) ++{ ++ platform_driver_unregister(&nop_usb_xceiv_driver); ++} ++module_exit(nop_usb_xceiv_exit); ++ ++MODULE_ALIAS("platform:nop_usb_xceiv"); ++MODULE_AUTHOR("Texas Instruments Inc"); ++MODULE_DESCRIPTION("NOP USB Transceiver driver"); ++MODULE_LICENSE("GPL"); +diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h +index 94df4fe..54f2424 100644 +--- a/include/linux/usb/otg.h ++++ b/include/linux/usb/otg.h +@@ -80,6 +80,10 @@ struct otg_transceiver { + + /* for board-specific init logic */ + extern int otg_set_transceiver(struct otg_transceiver *); ++#ifdef CONFIG_NOP_USB_XCEIV ++extern void usb_nop_xceiv_register(void); ++extern void usb_nop_xceiv_unregister(void); ++#endif + + + /* for usb host and peripheral controller drivers */ +-- +1.6.0.4 + |