1 // SPDX-License-Identifier: GPL-2.0
2 #include "tw5864.h"
3 
4 void tw5864_indir_writeb(struct tw5864_dev *dev, u16 addr, u8 data)
5 {
6 	int retries = 30000;
7 
8 	while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
9 		;
10 	if (!retries)
11 		dev_err(&dev->pci->dev,
12 			"tw_indir_writel() retries exhausted before writing\n");
13 
14 	tw_writel(TW5864_IND_DATA, data);
15 	tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_RW | TW5864_ENABLE);
16 }
17 
18 u8 tw5864_indir_readb(struct tw5864_dev *dev, u16 addr)
19 {
20 	int retries = 30000;
21 
22 	while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
23 		;
24 	if (!retries)
25 		dev_err(&dev->pci->dev,
26 			"tw_indir_readl() retries exhausted before reading\n");
27 
28 	tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_ENABLE);
29 
30 	retries = 30000;
31 	while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
32 		;
33 	if (!retries)
34 		dev_err(&dev->pci->dev,
35 			"tw_indir_readl() retries exhausted at reading\n");
36 
37 	return tw_readl(TW5864_IND_DATA);
38 }
39