Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Broadcom specific AMBA
3 * Core ops
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
8#include "bcma_private.h"
9#include <linux/bcma/bcma.h>
10
11bool bcma_core_is_enabled(struct bcma_device *core)
12{
13 if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
14 != BCMA_IOCTL_CLK)
15 return false;
16 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
17 return false;
18 return true;
19}
20EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
21
22static void bcma_core_disable(struct bcma_device *core, u32 flags)
23{
24 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
25 return;
26
27 bcma_awrite32(core, BCMA_IOCTL, flags);
28 bcma_aread32(core, BCMA_IOCTL);
29 udelay(10);
30
31 bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
32 udelay(1);
33}
34
35int bcma_core_enable(struct bcma_device *core, u32 flags)
36{
37 bcma_core_disable(core, flags);
38
39 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
40 bcma_aread32(core, BCMA_IOCTL);
41
42 bcma_awrite32(core, BCMA_RESET_CTL, 0);
43 udelay(1);
44
45 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
46 bcma_aread32(core, BCMA_IOCTL);
47 udelay(1);
48
49 return 0;
50}
51EXPORT_SYMBOL_GPL(bcma_core_enable);