1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2018 Cadence Design Systems Inc.
4 *
5 * Author: Boris Brezillon <boris.brezillon@bootlin.com>
6 */
7
8 #ifndef I3C_INTERNALS_H
9 #define I3C_INTERNALS_H
10
11 #include <linux/i3c/master.h>
12 #include <linux/io.h>
13
14 void i3c_bus_normaluse_lock(struct i3c_bus *bus);
15 void i3c_bus_normaluse_unlock(struct i3c_bus *bus);
16
17 int i3c_dev_setdasa_locked(struct i3c_dev_desc *dev);
18 int i3c_dev_do_priv_xfers_locked(struct i3c_dev_desc *dev,
19 struct i3c_priv_xfer *xfers,
20 int nxfers);
21 int i3c_dev_disable_ibi_locked(struct i3c_dev_desc *dev);
22 int i3c_dev_enable_ibi_locked(struct i3c_dev_desc *dev);
23 int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev,
24 const struct i3c_ibi_setup *req);
25 void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev);
26
27 /**
28 * i3c_writel_fifo - Write data buffer to 32bit FIFO
29 * @addr: FIFO Address to write to
30 * @buf: Pointer to the data bytes to write
31 * @nbytes: Number of bytes to write
32 */
i3c_writel_fifo(void __iomem * addr,const void * buf,int nbytes)33 static inline void i3c_writel_fifo(void __iomem *addr, const void *buf,
34 int nbytes)
35 {
36 writesl(addr, buf, nbytes / 4);
37 if (nbytes & 3) {
38 u32 tmp = 0;
39
40 memcpy(&tmp, buf + (nbytes & ~3), nbytes & 3);
41 writel(tmp, addr);
42 }
43 }
44
45 /**
46 * i3c_readl_fifo - Read data buffer from 32bit FIFO
47 * @addr: FIFO Address to read from
48 * @buf: Pointer to the buffer to store read bytes
49 * @nbytes: Number of bytes to read
50 */
i3c_readl_fifo(const void __iomem * addr,void * buf,int nbytes)51 static inline void i3c_readl_fifo(const void __iomem *addr, void *buf,
52 int nbytes)
53 {
54 readsl(addr, buf, nbytes / 4);
55 if (nbytes & 3) {
56 u32 tmp;
57
58 tmp = readl(addr);
59 memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
60 }
61 }
62
63 #endif /* I3C_INTERNAL_H */
64