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-rw-r--r--meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0024-USB-otg-adding-nop-usb-transceiver.patch259
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 @@
1From de835357b3597af5304742cbd89771d70533292a Mon Sep 17 00:00:00 2001
2From: Ajay Kumar Gupta <ajay.gupta@ti.com>
3Date: Fri, 6 Feb 2009 17:32:35 +0530
4Subject: [PATCH] USB: otg: adding nop usb transceiver
5
6NOP transceiver is used by all the usb transceiver which are mostly
7autonomous and doesn't require any programming or which are built
8into the usb ip itself.NOP transceiver only allocates the memory
9for struct xceiv and calls otg_set_transceiver() so function call
10to otg_get_transceiver() will return a valid transceiver.
11
12NOP transceiver device should be registered by calling
13usb_nop_xceiv_register() from platform files.
14
15Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
16Cc: Felipe Balbi <felipe.balbi@nokia.com>
17Cc: David Brownell <dbrownell@users.sourceforge.net>
18Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
19---
20 drivers/usb/otg/Kconfig | 8 ++
21 drivers/usb/otg/Makefile | 1 +
22 drivers/usb/otg/nop-usb-xceiv.c | 180 +++++++++++++++++++++++++++++++++++++++
23 include/linux/usb/otg.h | 4 +
24 4 files changed, 193 insertions(+), 0 deletions(-)
25 create mode 100644 drivers/usb/otg/nop-usb-xceiv.c
26
27diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
28index 5790a5b..aa884d0 100644
29--- a/drivers/usb/otg/Kconfig
30+++ b/drivers/usb/otg/Kconfig
31@@ -51,4 +51,12 @@ config TWL4030_USB
32 This transceiver supports high and full speed devices plus,
33 in host mode, low speed.
34
35+config NOP_USB_XCEIV
36+ tristate "NOP USB Transceiver Driver"
37+ select USB_OTG_UTILS
38+ help
39+ this driver is to be used by all the usb transceiver which are either
40+ built-in with usb ip or which are autonomous and doesn't require any
41+ phy programming such as ISP1x04 etc.
42+
43 endif # USB || OTG
44diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
45index d73c7cf..2081678 100644
46--- a/drivers/usb/otg/Makefile
47+++ b/drivers/usb/otg/Makefile
48@@ -9,6 +9,7 @@ obj-$(CONFIG_USB_OTG_UTILS) += otg.o
49 obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o
50 obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
51 obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o
52+obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o
53
54 ccflags-$(CONFIG_USB_DEBUG) += -DDEBUG
55 ccflags-$(CONFIG_USB_GADGET_DEBUG) += -DDEBUG
56diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
57new file mode 100644
58index 0000000..4b933f6
59--- /dev/null
60+++ b/drivers/usb/otg/nop-usb-xceiv.c
61@@ -0,0 +1,180 @@
62+/*
63+ * drivers/usb/otg/nop-usb-xceiv.c
64+ *
65+ * NOP USB transceiver for all USB transceiver which are either built-in
66+ * into USB IP or which are mostly autonomous.
67+ *
68+ * Copyright (C) 2009 Texas Instruments Inc
69+ * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
70+ *
71+ * This program is free software; you can redistribute it and/or modify
72+ * it under the terms of the GNU General Public License as published by
73+ * the Free Software Foundation; either version 2 of the License, or
74+ * (at your option) any later version.
75+ *
76+ * This program is distributed in the hope that it will be useful,
77+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
78+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
79+ * GNU General Public License for more details.
80+ *
81+ * You should have received a copy of the GNU General Public License
82+ * along with this program; if not, write to the Free Software
83+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
84+ *
85+ * Current status:
86+ * this is to add "nop" transceiver for all those phy which is
87+ * autonomous such as isp1504 etc.
88+ */
89+
90+#include <linux/module.h>
91+#include <linux/platform_device.h>
92+#include <linux/dma-mapping.h>
93+#include <linux/usb/otg.h>
94+
95+struct nop_usb_xceiv {
96+ struct otg_transceiver otg;
97+ struct device *dev;
98+};
99+
100+static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
101+
102+static struct platform_device nop_xceiv_device = {
103+ .name = "nop_usb_xceiv",
104+ .id = -1,
105+ .dev = {
106+ .dma_mask = &nop_xceiv_dmamask,
107+ .coherent_dma_mask = DMA_32BIT_MASK,
108+ .platform_data = NULL,
109+ },
110+};
111+
112+void usb_nop_xceiv_register(void)
113+{
114+ if (platform_device_register(&nop_xceiv_device) < 0) {
115+ printk(KERN_ERR "Unable to register usb nop transceiver\n");
116+ return;
117+ }
118+}
119+
120+void usb_nop_xceiv_unregister(void)
121+{
122+ platform_device_unregister(&nop_xceiv_device);
123+}
124+
125+static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x)
126+{
127+ return container_of(x, struct nop_usb_xceiv, otg);
128+}
129+
130+static int nop_set_suspend(struct otg_transceiver *x, int suspend)
131+{
132+ return 0;
133+}
134+
135+static int nop_set_peripheral(struct otg_transceiver *x,
136+ struct usb_gadget *gadget)
137+{
138+ struct nop_usb_xceiv *nop;
139+
140+ if (!x)
141+ return -ENODEV;
142+
143+ nop = xceiv_to_nop(x);
144+
145+ if (!gadget) {
146+ nop->otg.gadget = NULL;
147+ return -ENODEV;
148+ }
149+
150+ nop->otg.gadget = gadget;
151+ nop->otg.state = OTG_STATE_B_IDLE;
152+ return 0;
153+}
154+
155+static int nop_set_host(struct otg_transceiver *x, struct usb_bus *host)
156+{
157+ struct nop_usb_xceiv *nop;
158+
159+ if (!x)
160+ return -ENODEV;
161+
162+ nop = xceiv_to_nop(x);
163+
164+ if (!host) {
165+ nop->otg.host = NULL;
166+ return -ENODEV;
167+ }
168+
169+ nop->otg.host = host;
170+ return 0;
171+}
172+
173+static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev)
174+{
175+ struct nop_usb_xceiv *nop;
176+ int err;
177+
178+ nop = kzalloc(sizeof *nop, GFP_KERNEL);
179+ if (!nop)
180+ return -ENOMEM;
181+
182+ nop->dev = &pdev->dev;
183+ nop->otg.dev = nop->dev;
184+ nop->otg.label = "nop-xceiv";
185+ nop->otg.state = OTG_STATE_UNDEFINED;
186+ nop->otg.set_host = nop_set_host;
187+ nop->otg.set_peripheral = nop_set_peripheral;
188+ nop->otg.set_suspend = nop_set_suspend;
189+
190+ err = otg_set_transceiver(&nop->otg);
191+ if (err) {
192+ dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
193+ err);
194+ goto exit;
195+ }
196+
197+ platform_set_drvdata(pdev, nop);
198+
199+ return 0;
200+exit:
201+ kfree(nop);
202+ return err;
203+}
204+
205+static int __devexit nop_usb_xceiv_remove(struct platform_device *pdev)
206+{
207+ struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
208+
209+ otg_set_transceiver(NULL);
210+
211+ platform_set_drvdata(pdev, NULL);
212+ kfree(nop);
213+
214+ return 0;
215+}
216+
217+static struct platform_driver nop_usb_xceiv_driver = {
218+ .probe = nop_usb_xceiv_probe,
219+ .remove = __devexit_p(nop_usb_xceiv_remove),
220+ .driver = {
221+ .name = "nop_usb_xceiv",
222+ .owner = THIS_MODULE,
223+ },
224+};
225+
226+static int __init nop_usb_xceiv_init(void)
227+{
228+ return platform_driver_register(&nop_usb_xceiv_driver);
229+}
230+subsys_initcall(nop_usb_xceiv_init);
231+
232+static void __exit nop_usb_xceiv_exit(void)
233+{
234+ platform_driver_unregister(&nop_usb_xceiv_driver);
235+}
236+module_exit(nop_usb_xceiv_exit);
237+
238+MODULE_ALIAS("platform:nop_usb_xceiv");
239+MODULE_AUTHOR("Texas Instruments Inc");
240+MODULE_DESCRIPTION("NOP USB Transceiver driver");
241+MODULE_LICENSE("GPL");
242diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
243index 94df4fe..54f2424 100644
244--- a/include/linux/usb/otg.h
245+++ b/include/linux/usb/otg.h
246@@ -80,6 +80,10 @@ struct otg_transceiver {
247
248 /* for board-specific init logic */
249 extern int otg_set_transceiver(struct otg_transceiver *);
250+#ifdef CONFIG_NOP_USB_XCEIV
251+extern void usb_nop_xceiv_register(void);
252+extern void usb_nop_xceiv_unregister(void);
253+#endif
254
255
256 /* for usb host and peripheral controller drivers */
257--
2581.6.0.4
259
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