1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun #include <errno.h>
10*4882a593Smuzhiyun #include <misc.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * Implement a miscellaneous uclass for those do not fit other more
14*4882a593Smuzhiyun * general classes. A set of generic read, write and ioctl methods may
15*4882a593Smuzhiyun * be used to access the device.
16*4882a593Smuzhiyun */
17*4882a593Smuzhiyun
misc_read(struct udevice * dev,int offset,void * buf,int size)18*4882a593Smuzhiyun int misc_read(struct udevice *dev, int offset, void *buf, int size)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun const struct misc_ops *ops = device_get_ops(dev);
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun if (!ops->read)
23*4882a593Smuzhiyun return -ENOSYS;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return ops->read(dev, offset, buf, size);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
misc_write(struct udevice * dev,int offset,void * buf,int size)28*4882a593Smuzhiyun int misc_write(struct udevice *dev, int offset, void *buf, int size)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun const struct misc_ops *ops = device_get_ops(dev);
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun if (!ops->write)
33*4882a593Smuzhiyun return -ENOSYS;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun return ops->write(dev, offset, buf, size);
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
misc_ioctl(struct udevice * dev,unsigned long request,void * buf)38*4882a593Smuzhiyun int misc_ioctl(struct udevice *dev, unsigned long request, void *buf)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun const struct misc_ops *ops = device_get_ops(dev);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun if (!ops->ioctl)
43*4882a593Smuzhiyun return -ENOSYS;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun return ops->ioctl(dev, request, buf);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
misc_call(struct udevice * dev,int msgid,void * tx_msg,int tx_size,void * rx_msg,int rx_size)48*4882a593Smuzhiyun int misc_call(struct udevice *dev, int msgid, void *tx_msg, int tx_size,
49*4882a593Smuzhiyun void *rx_msg, int rx_size)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun const struct misc_ops *ops = device_get_ops(dev);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun if (!ops->call)
54*4882a593Smuzhiyun return -ENOSYS;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun return ops->call(dev, msgid, tx_msg, tx_size, rx_msg, rx_size);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
misc_get_device_by_capability(u32 capability)59*4882a593Smuzhiyun struct udevice *misc_get_device_by_capability(u32 capability)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun const struct misc_ops *ops;
62*4882a593Smuzhiyun struct udevice *dev;
63*4882a593Smuzhiyun struct uclass *uc;
64*4882a593Smuzhiyun int ret;
65*4882a593Smuzhiyun u32 cap;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun ret = uclass_get(UCLASS_MISC, &uc);
68*4882a593Smuzhiyun if (ret)
69*4882a593Smuzhiyun return NULL;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun for (uclass_first_device(UCLASS_MISC, &dev);
72*4882a593Smuzhiyun dev;
73*4882a593Smuzhiyun uclass_next_device(&dev)) {
74*4882a593Smuzhiyun ops = device_get_ops(dev);
75*4882a593Smuzhiyun if (!ops || !ops->ioctl)
76*4882a593Smuzhiyun continue;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun ret = ops->ioctl(dev, IOCTL_REQ_CAPABILITY, &cap);
79*4882a593Smuzhiyun if (!ret && ((cap & capability) == capability))
80*4882a593Smuzhiyun return dev;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return NULL;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun UCLASS_DRIVER(misc) = {
87*4882a593Smuzhiyun .id = UCLASS_MISC,
88*4882a593Smuzhiyun .name = "misc",
89*4882a593Smuzhiyun };
90