mirror of https://gitee.com/openkylin/linux.git
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
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* Broadcom specific AMBA
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* ChipCommon B Unit driver
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*
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* Copyright 2014, Hauke Mehrtens <hauke@hauke-m.de>
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*
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* Licensed under the GNU/GPL. See COPYING for details.
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*/
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#include "bcma_private.h"
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#include <linux/export.h>
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#include <linux/bcma/bcma.h>
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static bool bcma_wait_reg(struct bcma_bus *bus, void __iomem *addr, u32 mask,
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u32 value, int timeout)
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{
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unsigned long deadline = jiffies + timeout;
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u32 val;
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do {
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val = readl(addr);
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if ((val & mask) == value)
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return true;
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cpu_relax();
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udelay(10);
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} while (!time_after_eq(jiffies, deadline));
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bcma_err(bus, "Timeout waiting for register %p\n", addr);
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return false;
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}
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void bcma_chipco_b_mii_write(struct bcma_drv_cc_b *ccb, u32 offset, u32 value)
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{
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struct bcma_bus *bus = ccb->core->bus;
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void __iomem *mii = ccb->mii;
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writel(offset, mii + BCMA_CCB_MII_MNG_CTL);
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bcma_wait_reg(bus, mii + BCMA_CCB_MII_MNG_CTL, 0x0100, 0x0000, 100);
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writel(value, mii + BCMA_CCB_MII_MNG_CMD_DATA);
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bcma_wait_reg(bus, mii + BCMA_CCB_MII_MNG_CTL, 0x0100, 0x0000, 100);
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}
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EXPORT_SYMBOL_GPL(bcma_chipco_b_mii_write);
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int bcma_core_chipcommon_b_init(struct bcma_drv_cc_b *ccb)
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{
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if (ccb->setup_done)
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return 0;
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ccb->setup_done = 1;
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ccb->mii = ioremap(ccb->core->addr_s[1], BCMA_CORE_SIZE);
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if (!ccb->mii)
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return -ENOMEM;
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return 0;
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}
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void bcma_core_chipcommon_b_free(struct bcma_drv_cc_b *ccb)
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{
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if (ccb->mii)
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iounmap(ccb->mii);
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}
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