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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/bcma/driver_chipcommon_b.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/bcma/driver_chipcommon_b.c')
-rw-r--r-- | drivers/bcma/driver_chipcommon_b.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/bcma/driver_chipcommon_b.c b/drivers/bcma/driver_chipcommon_b.c new file mode 100644 index 0000000000..c153c96a61 --- /dev/null +++ b/drivers/bcma/driver_chipcommon_b.c @@ -0,0 +1,62 @@ +/* + * Broadcom specific AMBA + * ChipCommon B Unit driver + * + * Copyright 2014, Hauke Mehrtens <hauke@hauke-m.de> + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + +#include "bcma_private.h" +#include <linux/export.h> +#include <linux/bcma/bcma.h> + +static bool bcma_wait_reg(struct bcma_bus *bus, void __iomem *addr, u32 mask, + u32 value, int timeout) +{ + unsigned long deadline = jiffies + timeout; + u32 val; + + do { + val = readl(addr); + if ((val & mask) == value) + return true; + cpu_relax(); + udelay(10); + } while (!time_after_eq(jiffies, deadline)); + + bcma_err(bus, "Timeout waiting for register %p\n", addr); + + return false; +} + +void bcma_chipco_b_mii_write(struct bcma_drv_cc_b *ccb, u32 offset, u32 value) +{ + struct bcma_bus *bus = ccb->core->bus; + void __iomem *mii = ccb->mii; + + writel(offset, mii + BCMA_CCB_MII_MNG_CTL); + bcma_wait_reg(bus, mii + BCMA_CCB_MII_MNG_CTL, 0x0100, 0x0000, 100); + writel(value, mii + BCMA_CCB_MII_MNG_CMD_DATA); + bcma_wait_reg(bus, mii + BCMA_CCB_MII_MNG_CTL, 0x0100, 0x0000, 100); +} +EXPORT_SYMBOL_GPL(bcma_chipco_b_mii_write); + +int bcma_core_chipcommon_b_init(struct bcma_drv_cc_b *ccb) +{ + if (ccb->setup_done) + return 0; + + ccb->setup_done = 1; + ccb->mii = ioremap(ccb->core->addr_s[1], BCMA_CORE_SIZE); + if (!ccb->mii) + return -ENOMEM; + + return 0; +} + +void bcma_core_chipcommon_b_free(struct bcma_drv_cc_b *ccb) +{ + if (ccb->mii) + iounmap(ccb->mii); +} |