Root/target/linux/brcm47xx/patches-3.2/181-USB-OHCI-Add-a-generic-platform-device-driver.patch

1From 2232a2ab6015496fecdfad68a9d6794312a9b2f2 Mon Sep 17 00:00:00 2001
2From: Hauke Mehrtens <hauke@hauke-m.de>
3Date: Sat, 26 Nov 2011 21:20:54 +0100
4Subject: [PATCH 181/186] USB: OHCI: Add a generic platform device driver
5
6This adds a generic driver for platform devices. It works like the PCI
7driver and is based on it. This is for devices which do not have an own
8bus but their OHCI controller works like a PCI controller. It will be
9used for the Broadcom bcma and ssb USB OHCI controller.
10
11Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
12---
13 drivers/usb/host/Kconfig | 10 ++
14 drivers/usb/host/ohci-hcd.c | 5 +
15 drivers/usb/host/ohci-platform.c | 183 ++++++++++++++++++++++++++++++++++++++
16 3 files changed, 198 insertions(+), 0 deletions(-)
17 create mode 100644 drivers/usb/host/ohci-platform.c
18
19--- a/drivers/usb/host/Kconfig
20+++ b/drivers/usb/host/Kconfig
21@@ -378,6 +378,16 @@ config USB_CNS3XXX_OHCI
22       Enable support for the CNS3XXX SOC's on-chip OHCI controller.
23       It is needed for low-speed USB 1.0 device support.
24 
25+config USB_OHCI_HCD_PLATFORM
26+ bool "OHCI driver for a platform device"
27+ depends on USB_OHCI_HCD && EXPERIMENTAL
28+ default n
29+ ---help---
30+ Adds an OHCI host driver for a generic platform device, which
31+ provieds a memory space and an irq.
32+
33+ If unsure, say N.
34+
35 config USB_OHCI_BIG_ENDIAN_DESC
36     bool
37     depends on USB_OHCI_HCD
38--- a/drivers/usb/host/ohci-hcd.c
39+++ b/drivers/usb/host/ohci-hcd.c
40@@ -1116,6 +1116,11 @@ MODULE_LICENSE ("GPL");
41 #define PLATFORM_DRIVER ohci_xls_driver
42 #endif
43 
44+#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
45+#include "ohci-platform.c"
46+#define PLATFORM_DRIVER ohci_platform_driver
47+#endif
48+
49 #if !defined(PCI_DRIVER) && \
50     !defined(PLATFORM_DRIVER) && \
51     !defined(OMAP1_PLATFORM_DRIVER) && \
52--- /dev/null
53+++ b/drivers/usb/host/ohci-platform.c
54@@ -0,0 +1,183 @@
55+/*
56+ * Generic platform ohci driver
57+ *
58+ * Copyright 2007 Michael Buesch <m@bues.ch>
59+ * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
60+ *
61+ * Derived from the OCHI-SSB driver
62+ * Derived from the OHCI-PCI driver
63+ * Copyright 1999 Roman Weissgaerber
64+ * Copyright 2000-2002 David Brownell
65+ * Copyright 1999 Linus Torvalds
66+ * Copyright 1999 Gregory P. Smith
67+ *
68+ * Licensed under the GNU/GPL. See COPYING for details.
69+ */
70+#include <linux/platform_device.h>
71+#include <linux/usb/hci_driver.h>
72+
73+static int ohci_platform_reset(struct usb_hcd *hcd)
74+{
75+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
76+ int err;
77+
78+ ohci_hcd_init(ohci);
79+ err = ohci_init(ohci);
80+
81+ return err;
82+}
83+
84+static int ohci_platform_start(struct usb_hcd *hcd)
85+{
86+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
87+ int err;
88+
89+ err = ohci_run(ohci);
90+ if (err < 0) {
91+ ohci_err(ohci, "can't start\n");
92+ ohci_stop(hcd);
93+ }
94+
95+ return err;
96+}
97+
98+static const struct hc_driver ohci_platform_hc_driver = {
99+ .description = hcd_name,
100+ .product_desc = "Generic Platform OHCI Controller",
101+ .hcd_priv_size = sizeof(struct ohci_hcd),
102+
103+ .irq = ohci_irq,
104+ .flags = HCD_MEMORY | HCD_USB11,
105+
106+ .reset = ohci_platform_reset,
107+ .start = ohci_platform_start,
108+ .stop = ohci_stop,
109+ .shutdown = ohci_shutdown,
110+
111+ .urb_enqueue = ohci_urb_enqueue,
112+ .urb_dequeue = ohci_urb_dequeue,
113+ .endpoint_disable = ohci_endpoint_disable,
114+
115+ .get_frame_number = ohci_get_frame,
116+
117+ .hub_status_data = ohci_hub_status_data,
118+ .hub_control = ohci_hub_control,
119+#ifdef CONFIG_PM
120+ .bus_suspend = ohci_bus_suspend,
121+ .bus_resume = ohci_bus_resume,
122+#endif
123+
124+ .start_port_reset = ohci_start_port_reset,
125+};
126+
127+static int __devinit ohci_platform_probe(struct platform_device *dev)
128+{
129+ struct usb_hcd *hcd;
130+ struct resource *res_mem;
131+ int irq;
132+ int err = -ENOMEM;
133+
134+ if (usb_disabled())
135+ return -ENODEV;
136+
137+ irq = platform_get_irq(dev, 0);
138+ if (irq < 0) {
139+ pr_err("no irq provieded");
140+ return irq;
141+ }
142+
143+ res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
144+ if (!res_mem) {
145+ pr_err("no memory recourse provieded");
146+ return -ENXIO;
147+ }
148+
149+ hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
150+ dev_name(&dev->dev));
151+ if (!hcd)
152+ return -ENOMEM;
153+
154+ hcd->rsrc_start = res_mem->start;
155+ hcd->rsrc_len = resource_size(res_mem);
156+
157+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
158+ pr_err("controller already in use");
159+ err = -EBUSY;
160+ goto err_put_hcd;
161+ }
162+
163+ hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
164+ if (!hcd->regs)
165+ goto err_release_region;
166+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
167+ if (err)
168+ goto err_iounmap;
169+
170+ platform_set_drvdata(dev, hcd);
171+
172+ return err;
173+
174+err_iounmap:
175+ iounmap(hcd->regs);
176+err_release_region:
177+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
178+err_put_hcd:
179+ usb_put_hcd(hcd);
180+ return err;
181+}
182+
183+static int __devexit ohci_platform_remove(struct platform_device *dev)
184+{
185+ struct usb_hcd *hcd = platform_get_drvdata(dev);
186+
187+ usb_remove_hcd(hcd);
188+ iounmap(hcd->regs);
189+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
190+ usb_put_hcd(hcd);
191+ platform_set_drvdata(dev, NULL);
192+
193+ return 0;
194+}
195+
196+#ifdef CONFIG_PM
197+
198+static int ohci_platform_suspend(struct device *dev)
199+{
200+ return 0;
201+}
202+
203+static int ohci_platform_resume(struct device *dev)
204+{
205+ struct usb_hcd *hcd = dev_get_drvdata(dev);
206+
207+ ohci_finish_controller_resume(hcd);
208+ return 0;
209+}
210+
211+#else /* !CONFIG_PM */
212+#define ohci_platform_suspend NULL
213+#define ohci_platform_resume NULL
214+#endif /* CONFIG_PM */
215+
216+static const struct platform_device_id ohci_platform_table[] = {
217+ { "ohci-platform", 0 },
218+ { }
219+};
220+MODULE_DEVICE_TABLE(platform, ohci_platform_table);
221+
222+static const struct dev_pm_ops ohci_platform_pm_ops = {
223+ .suspend = ohci_platform_suspend,
224+ .resume = ohci_platform_resume,
225+};
226+
227+static struct platform_driver ohci_platform_driver = {
228+ .id_table = ohci_platform_table,
229+ .probe = ohci_platform_probe,
230+ .remove = __devexit_p(ohci_platform_remove),
231+ .shutdown = usb_hcd_platform_shutdown,
232+ .driver = {
233+ .owner = THIS_MODULE,
234+ .name = "ohci-platform",
235+ .pm = &ohci_platform_pm_ops,
236+ }
237+};
238

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