| 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 |