summaryrefslogtreecommitdiffstats
path: root/drivers/bcma/core.c
blob: 893f6e0c759fa75f0831ad6fa157567ab31a71a1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
/*
 * Broadcom specific AMBA
 * Core ops
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include "bcma_private.h"
#include <linux/export.h>
#include <linux/bcma/bcma.h>

bool bcma_core_is_enabled(struct bcma_device *core)
{
	if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
	    != BCMA_IOCTL_CLK)
		return false;
	if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
		return false;
	return true;
}
EXPORT_SYMBOL_GPL(bcma_core_is_enabled);

void bcma_core_disable(struct bcma_device *core, u32 flags)
{
	if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
		return;

	bcma_awrite32(core, BCMA_IOCTL, flags);
	bcma_aread32(core, BCMA_IOCTL);
	udelay(10);

	bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
	udelay(1);
}
EXPORT_SYMBOL_GPL(bcma_core_disable);

int bcma_core_enable(struct bcma_device *core, u32 flags)
{
	bcma_core_disable(core, flags);

	bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
	bcma_aread32(core, BCMA_IOCTL);

	bcma_awrite32(core, BCMA_RESET_CTL, 0);
	udelay(1);

	bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
	bcma_aread32(core, BCMA_IOCTL);
	udelay(1);

	return 0;
}
EXPORT_SYMBOL_GPL(bcma_core_enable);

void bcma_core_set_clockmode(struct bcma_device *core,
			     enum bcma_clkmode clkmode)
{
	u16 i;

	WARN_ON(core->id.id != BCMA_CORE_CHIPCOMMON &&
		core->id.id != BCMA_CORE_PCIE &&
		core->id.id != BCMA_CORE_80211);

	switch (clkmode) {
	case BCMA_CLKMODE_FAST:
		bcma_set32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
		udelay(64);
		for (i = 0; i < 1500; i++) {
			if (bcma_read32(core, BCMA_CLKCTLST) &
			    BCMA_CLKCTLST_HAVEHT) {
				i = 0;
				break;
			}
			udelay(10);
		}
		if (i)
			pr_err("HT force timeout\n");
		break;
	case BCMA_CLKMODE_DYNAMIC:
		pr_warn("Dynamic clockmode not supported yet!\n");
		break;
	}
}
EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);

void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
{
	u16 i;

	WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ);
	WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST);

	if (on) {
		bcma_set32(core, BCMA_CLKCTLST, req);
		for (i = 0; i < 10000; i++) {
			if ((bcma_read32(core, BCMA_CLKCTLST) & status) ==
			    status) {
				i = 0;
				break;
			}
			udelay(10);
		}
		if (i)
			pr_err("PLL enable timeout\n");
	} else {
		pr_warn("Disabling PLL not supported yet!\n");
	}
}
EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);

u32 bcma_core_dma_translation(struct bcma_device *core)
{
	switch (core->bus->hosttype) {
	case BCMA_HOSTTYPE_SOC:
		return 0;
	case BCMA_HOSTTYPE_PCI:
		if (bcma_aread32(core, BCMA_IOST) & BCMA_IOST_DMA64)
			return BCMA_DMA_TRANSLATION_DMA64_CMT;
		else
			return BCMA_DMA_TRANSLATION_DMA32_CMT;
	default:
		pr_err("DMA translation unknown for host %d\n",
		       core->bus->hosttype);
	}
	return BCMA_DMA_TRANSLATION_NONE;
}
EXPORT_SYMBOL(bcma_core_dma_translation);