tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * USB device controllers have lots of quirks. Use these macros in
3 * gadget drivers or other code that needs to deal with them, and which
4 * autoconfigures instead of using early binding to the hardware.
5 *
6 * This SHOULD eventually work like the ARM mach_is_*() stuff, driven by
7 * some config file that gets updated as new hardware is supported.
8 * (And avoiding all runtime comparisons in typical one-choice configs!)
9 *
10 * NOTE: some of these controller drivers may not be available yet.
11 * Some are available on 2.4 kernels; several are available, but not
12 * yet pushed in the 2.6 mainline tree.
13 */
14
15#ifndef __GADGET_CHIPS_H
16#define __GADGET_CHIPS_H
17
18/*
19 * NOTICE: the entries below are alphabetical and should be kept
20 * that way.
21 *
22 * Always be sure to add new entries to the correct position or
23 * accept the bashing later.
24 *
25 * If you have forgotten the alphabetical order let VIM/EMACS
26 * do that for you.
27 */
28#define gadget_is_amd5536udc(g) (!strcmp("amd5536udc", (g)->name))
29#define gadget_is_at91(g) (!strcmp("at91_udc", (g)->name))
30#define gadget_is_atmel_usba(g) (!strcmp("atmel_usba_udc", (g)->name))
31#define gadget_is_ci13xxx_msm(g) (!strcmp("ci13xxx_msm", (g)->name))
32#define gadget_is_ci13xxx_pci(g) (!strcmp("ci13xxx_pci", (g)->name))
33#define gadget_is_dummy(g) (!strcmp("dummy_udc", (g)->name))
34#define gadget_is_dwc3(g) (!strcmp("dwc3-gadget", (g)->name))
35#define gadget_is_fsl_qe(g) (!strcmp("fsl_qe_udc", (g)->name))
36#define gadget_is_fsl_usb2(g) (!strcmp("fsl-usb2-udc", (g)->name))
37#define gadget_is_goku(g) (!strcmp("goku_udc", (g)->name))
38#define gadget_is_imx(g) (!strcmp("imx_udc", (g)->name))
39#define gadget_is_langwell(g) (!strcmp("langwell_udc", (g)->name))
40#define gadget_is_lpc32xx(g) (!strcmp("lpc32xx_udc", (g)->name))
41#define gadget_is_m66592(g) (!strcmp("m66592_udc", (g)->name))
42#define gadget_is_musbhdrc(g) (!strcmp("musb-hdrc", (g)->name))
43#define gadget_is_net2272(g) (!strcmp("net2272", (g)->name))
44#define gadget_is_net2280(g) (!strcmp("net2280", (g)->name))
45#define gadget_is_omap(g) (!strcmp("omap_udc", (g)->name))
46#define gadget_is_pch(g) (!strcmp("pch_udc", (g)->name))
47#define gadget_is_pxa(g) (!strcmp("pxa25x_udc", (g)->name))
48#define gadget_is_pxa27x(g) (!strcmp("pxa27x_udc", (g)->name))
49#define gadget_is_r8a66597(g) (!strcmp("r8a66597_udc", (g)->name))
50#define gadget_is_renesas_usbhs(g) (!strcmp("renesas_usbhs_udc", (g)->name))
51#define gadget_is_s3c2410(g) (!strcmp("s3c2410_udc", (g)->name))
52#define gadget_is_s3c_hsotg(g) (!strcmp("s3c-hsotg", (g)->name))
53#define gadget_is_s3c_hsudc(g) (!strcmp("s3c-hsudc", (g)->name))
54
55/**
56 * usb_gadget_controller_number - support bcdDevice id convention
57 * @gadget: the controller being driven
58 *
59 * Return a 2-digit BCD value associated with the peripheral controller,
60 * suitable for use as part of a bcdDevice value, or a negative error code.
61 *
62 * NOTE: this convention is purely optional, and has no meaning in terms of
63 * any USB specification. If you want to use a different convention in your
64 * gadget driver firmware -- maybe a more formal revision ID -- feel free.
65 *
66 * Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
67 * to change their behavior accordingly. For example it might help avoiding
68 * some chip bug.
69 */
70static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
71{
72 if (gadget_is_net2280(gadget))
73 return 0x01;
74 else if (gadget_is_dummy(gadget))
75 return 0x02;
76 else if (gadget_is_pxa(gadget))
77 return 0x03;
78 else if (gadget_is_goku(gadget))
79 return 0x06;
80 else if (gadget_is_omap(gadget))
81 return 0x08;
82 else if (gadget_is_pxa27x(gadget))
83 return 0x11;
84 else if (gadget_is_s3c2410(gadget))
85 return 0x12;
86 else if (gadget_is_at91(gadget))
87 return 0x13;
88 else if (gadget_is_imx(gadget))
89 return 0x14;
90 else if (gadget_is_musbhdrc(gadget))
91 return 0x16;
92 else if (gadget_is_atmel_usba(gadget))
93 return 0x18;
94 else if (gadget_is_fsl_usb2(gadget))
95 return 0x19;
96 else if (gadget_is_amd5536udc(gadget))
97 return 0x20;
98 else if (gadget_is_m66592(gadget))
99 return 0x21;
100 else if (gadget_is_fsl_qe(gadget))
101 return 0x22;
102 else if (gadget_is_ci13xxx_pci(gadget))
103 return 0x23;
104 else if (gadget_is_langwell(gadget))
105 return 0x24;
106 else if (gadget_is_r8a66597(gadget))
107 return 0x25;
108 else if (gadget_is_s3c_hsotg(gadget))
109 return 0x26;
110 else if (gadget_is_pch(gadget))
111 return 0x27;
112 else if (gadget_is_ci13xxx_msm(gadget))
113 return 0x28;
114 else if (gadget_is_renesas_usbhs(gadget))
115 return 0x29;
116 else if (gadget_is_s3c_hsudc(gadget))
117 return 0x30;
118 else if (gadget_is_net2272(gadget))
119 return 0x31;
120 else if (gadget_is_dwc3(gadget))
121 return 0x32;
122 else if (gadget_is_lpc32xx(gadget))
123 return 0x33;
124
125 return -ENOENT;
126}
127
128
129/**
130 * gadget_supports_altsettings - return true if altsettings work
131 * @gadget: the gadget in question
132 */
133static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
134{
135 /* PXA 21x/25x/26x has no altsettings at all */
136 if (gadget_is_pxa(gadget))
137 return false;
138
139 /* PXA 27x and 3xx have *broken* altsetting support */
140 if (gadget_is_pxa27x(gadget))
141 return false;
142
143 /* Everything else is *presumably* fine ... */
144 return true;
145}
146
147#endif /* __GADGET_CHIPS_H */