1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
234d1324eSAndrey Utkin #include "tw5864.h"
334d1324eSAndrey Utkin
tw5864_indir_writeb(struct tw5864_dev * dev,u16 addr,u8 data)434d1324eSAndrey Utkin void tw5864_indir_writeb(struct tw5864_dev *dev, u16 addr, u8 data)
534d1324eSAndrey Utkin {
634d1324eSAndrey Utkin int retries = 30000;
734d1324eSAndrey Utkin
834d1324eSAndrey Utkin while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
934d1324eSAndrey Utkin ;
1034d1324eSAndrey Utkin if (!retries)
1134d1324eSAndrey Utkin dev_err(&dev->pci->dev,
1234d1324eSAndrey Utkin "tw_indir_writel() retries exhausted before writing\n");
1334d1324eSAndrey Utkin
1434d1324eSAndrey Utkin tw_writel(TW5864_IND_DATA, data);
1534d1324eSAndrey Utkin tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_RW | TW5864_ENABLE);
1634d1324eSAndrey Utkin }
1734d1324eSAndrey Utkin
tw5864_indir_readb(struct tw5864_dev * dev,u16 addr)1834d1324eSAndrey Utkin u8 tw5864_indir_readb(struct tw5864_dev *dev, u16 addr)
1934d1324eSAndrey Utkin {
2034d1324eSAndrey Utkin int retries = 30000;
2134d1324eSAndrey Utkin
2234d1324eSAndrey Utkin while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
2334d1324eSAndrey Utkin ;
2434d1324eSAndrey Utkin if (!retries)
2534d1324eSAndrey Utkin dev_err(&dev->pci->dev,
2634d1324eSAndrey Utkin "tw_indir_readl() retries exhausted before reading\n");
2734d1324eSAndrey Utkin
2834d1324eSAndrey Utkin tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_ENABLE);
2934d1324eSAndrey Utkin
3034d1324eSAndrey Utkin retries = 30000;
3134d1324eSAndrey Utkin while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries)
3234d1324eSAndrey Utkin ;
3334d1324eSAndrey Utkin if (!retries)
3434d1324eSAndrey Utkin dev_err(&dev->pci->dev,
3534d1324eSAndrey Utkin "tw_indir_readl() retries exhausted at reading\n");
3634d1324eSAndrey Utkin
3734d1324eSAndrey Utkin return tw_readl(TW5864_IND_DATA);
3834d1324eSAndrey Utkin }
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