diff options
Diffstat (limited to 'kernel/drivers/bcma/driver_chipcommon_b.c')
-rw-r--r-- | kernel/drivers/bcma/driver_chipcommon_b.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/kernel/drivers/bcma/driver_chipcommon_b.c b/kernel/drivers/bcma/driver_chipcommon_b.c new file mode 100644 index 000000000..c20b5f4ff --- /dev/null +++ b/kernel/drivers/bcma/driver_chipcommon_b.c @@ -0,0 +1,61 @@ +/* + * 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; + + writel(offset, ccb->mii + 0x00); + bcma_wait_reg(bus, ccb->mii + 0x00, 0x0100, 0x0000, 100); + writel(value, ccb->mii + 0x04); + bcma_wait_reg(bus, ccb->mii + 0x00, 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_nocache(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); +} |