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