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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/pci/tw5864/tw5864-util.c | |
| parent | Initial commit. (diff) | |
| download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip | |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/pci/tw5864/tw5864-util.c')
| -rw-r--r-- | drivers/media/pci/tw5864/tw5864-util.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/media/pci/tw5864/tw5864-util.c b/drivers/media/pci/tw5864/tw5864-util.c new file mode 100644 index 000000000..b9cebe9d1 --- /dev/null +++ b/drivers/media/pci/tw5864/tw5864-util.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "tw5864.h" + +void tw5864_indir_writeb(struct tw5864_dev *dev, u16 addr, u8 data) +{ + int retries = 30000; + + while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries) + ; + if (!retries) + dev_err(&dev->pci->dev, + "tw_indir_writel() retries exhausted before writing\n"); + + tw_writel(TW5864_IND_DATA, data); + tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_RW | TW5864_ENABLE); +} + +u8 tw5864_indir_readb(struct tw5864_dev *dev, u16 addr) +{ + int retries = 30000; + + while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries) + ; + if (!retries) + dev_err(&dev->pci->dev, + "tw_indir_readl() retries exhausted before reading\n"); + + tw_writel(TW5864_IND_CTL, addr << 2 | TW5864_ENABLE); + + retries = 30000; + while (tw_readl(TW5864_IND_CTL) & BIT(31) && --retries) + ; + if (!retries) + dev_err(&dev->pci->dev, + "tw_indir_readl() retries exhausted at reading\n"); + + return tw_readl(TW5864_IND_DATA); +} |