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Rafał Miłecki8369ae32011-05-09 18:56:46 +02001/*
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"
Paul Gortmaker44a8e372011-07-27 21:21:04 -04009#include <linux/export.h>
Rafał Miłecki8369ae32011-05-09 18:56:46 +020010#include <linux/bcma/bcma.h>
11
12bool bcma_core_is_enabled(struct bcma_device *core)
13{
14 if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
15 != BCMA_IOCTL_CLK)
16 return false;
17 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
18 return false;
19 return true;
20}
21EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
22
Arend van Spriele3ae0ca2011-06-09 20:07:20 +020023void bcma_core_disable(struct bcma_device *core, u32 flags)
Rafał Miłecki8369ae32011-05-09 18:56:46 +020024{
25 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
26 return;
27
28 bcma_awrite32(core, BCMA_IOCTL, flags);
29 bcma_aread32(core, BCMA_IOCTL);
30 udelay(10);
31
32 bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
Nathan Hintz044e68c2012-05-04 21:56:36 -070033 bcma_aread32(core, BCMA_RESET_CTL);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020034 udelay(1);
35}
Arend van Spriele3ae0ca2011-06-09 20:07:20 +020036EXPORT_SYMBOL_GPL(bcma_core_disable);
Rafał Miłecki8369ae32011-05-09 18:56:46 +020037
38int bcma_core_enable(struct bcma_device *core, u32 flags)
39{
40 bcma_core_disable(core, flags);
41
42 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
43 bcma_aread32(core, BCMA_IOCTL);
44
45 bcma_awrite32(core, BCMA_RESET_CTL, 0);
46 udelay(1);
47
48 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
49 bcma_aread32(core, BCMA_IOCTL);
50 udelay(1);
51
52 return 0;
53}
54EXPORT_SYMBOL_GPL(bcma_core_enable);
Rafał Miłecki7424dd02011-07-17 01:06:04 +020055
56void bcma_core_set_clockmode(struct bcma_device *core,
57 enum bcma_clkmode clkmode)
58{
59 u16 i;
60
61 WARN_ON(core->id.id != BCMA_CORE_CHIPCOMMON &&
62 core->id.id != BCMA_CORE_PCIE &&
63 core->id.id != BCMA_CORE_80211);
64
65 switch (clkmode) {
66 case BCMA_CLKMODE_FAST:
67 bcma_set32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
Rafał Miłecki1fd41a62012-09-25 10:17:22 +020068 usleep_range(64, 300);
Rafał Miłecki7424dd02011-07-17 01:06:04 +020069 for (i = 0; i < 1500; i++) {
70 if (bcma_read32(core, BCMA_CLKCTLST) &
71 BCMA_CLKCTLST_HAVEHT) {
72 i = 0;
73 break;
74 }
75 udelay(10);
76 }
77 if (i)
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +020078 bcma_err(core->bus, "HT force timeout\n");
Rafał Miłecki7424dd02011-07-17 01:06:04 +020079 break;
80 case BCMA_CLKMODE_DYNAMIC:
Hauke Mehrtens0b2948e2012-04-29 02:18:49 +020081 bcma_set32(core, BCMA_CLKCTLST, ~BCMA_CLKCTLST_FORCEHT);
Rafał Miłecki7424dd02011-07-17 01:06:04 +020082 break;
83 }
84}
85EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);
Rafał Miłecki6f539122011-07-17 01:06:05 +020086
87void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
88{
89 u16 i;
90
91 WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ);
92 WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST);
93
94 if (on) {
95 bcma_set32(core, BCMA_CLKCTLST, req);
96 for (i = 0; i < 10000; i++) {
97 if ((bcma_read32(core, BCMA_CLKCTLST) & status) ==
98 status) {
99 i = 0;
100 break;
101 }
102 udelay(10);
103 }
104 if (i)
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200105 bcma_err(core->bus, "PLL enable timeout\n");
Rafał Miłecki6f539122011-07-17 01:06:05 +0200106 } else {
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200107 bcma_warn(core->bus, "Disabling PLL not supported yet!\n");
Rafał Miłecki6f539122011-07-17 01:06:05 +0200108 }
109}
110EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);
Rafał Miłecki05aec232011-07-20 19:52:15 +0200111
112u32 bcma_core_dma_translation(struct bcma_device *core)
113{
114 switch (core->bus->hosttype) {
Hauke Mehrtensecd177c2011-07-23 01:20:08 +0200115 case BCMA_HOSTTYPE_SOC:
116 return 0;
Rafał Miłecki05aec232011-07-20 19:52:15 +0200117 case BCMA_HOSTTYPE_PCI:
118 if (bcma_aread32(core, BCMA_IOST) & BCMA_IOST_DMA64)
119 return BCMA_DMA_TRANSLATION_DMA64_CMT;
120 else
121 return BCMA_DMA_TRANSLATION_DMA32_CMT;
122 default:
Rafał Miłecki3d9d8af2012-07-05 22:07:32 +0200123 bcma_err(core->bus, "DMA translation unknown for host %d\n",
124 core->bus->hosttype);
Rafał Miłecki05aec232011-07-20 19:52:15 +0200125 }
126 return BCMA_DMA_TRANSLATION_NONE;
127}
128EXPORT_SYMBOL(bcma_core_dma_translation);