blob: c20b5f4ff2901ebaac31b02c93cd2b78d21f99ea [file] [log] [blame]
Hauke Mehrtens1716bcf2014-09-08 22:53:36 +02001/*
2 * Broadcom specific AMBA
3 * ChipCommon B Unit driver
4 *
5 * Copyright 2014, Hauke Mehrtens <hauke@hauke-m.de>
6 *
7 * Licensed under the GNU/GPL. See COPYING for details.
8 */
9
10#include "bcma_private.h"
11#include <linux/export.h>
12#include <linux/bcma/bcma.h>
13
14static bool bcma_wait_reg(struct bcma_bus *bus, void __iomem *addr, u32 mask,
15 u32 value, int timeout)
16{
17 unsigned long deadline = jiffies + timeout;
18 u32 val;
19
20 do {
21 val = readl(addr);
22 if ((val & mask) == value)
23 return true;
24 cpu_relax();
25 udelay(10);
26 } while (!time_after_eq(jiffies, deadline));
27
28 bcma_err(bus, "Timeout waiting for register %p\n", addr);
29
30 return false;
31}
32
33void bcma_chipco_b_mii_write(struct bcma_drv_cc_b *ccb, u32 offset, u32 value)
34{
35 struct bcma_bus *bus = ccb->core->bus;
36
37 writel(offset, ccb->mii + 0x00);
38 bcma_wait_reg(bus, ccb->mii + 0x00, 0x0100, 0x0000, 100);
39 writel(value, ccb->mii + 0x04);
40 bcma_wait_reg(bus, ccb->mii + 0x00, 0x0100, 0x0000, 100);
41}
42EXPORT_SYMBOL_GPL(bcma_chipco_b_mii_write);
43
44int bcma_core_chipcommon_b_init(struct bcma_drv_cc_b *ccb)
45{
46 if (ccb->setup_done)
47 return 0;
48
49 ccb->setup_done = 1;
50 ccb->mii = ioremap_nocache(ccb->core->addr_s[1], BCMA_CORE_SIZE);
51 if (!ccb->mii)
52 return -ENOMEM;
53
54 return 0;
55}
56
57void bcma_core_chipcommon_b_free(struct bcma_drv_cc_b *ccb)
58{
59 if (ccb->mii)
60 iounmap(ccb->mii);
61}