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/export.h>
10 #include <linux/bcma/bcma.h>
11
bcma_core_is_enabled(struct bcma_device * core)12 bool 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 }
21 EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
22
bcma_core_disable(struct bcma_device * core,u32 flags)23 void bcma_core_disable(struct bcma_device *core, u32 flags)
24 {
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);
33 udelay(1);
34 }
35 EXPORT_SYMBOL_GPL(bcma_core_disable);
36
bcma_core_enable(struct bcma_device * core,u32 flags)37 int bcma_core_enable(struct bcma_device *core, u32 flags)
38 {
39 bcma_core_disable(core, flags);
40
41 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
42 bcma_aread32(core, BCMA_IOCTL);
43
44 bcma_awrite32(core, BCMA_RESET_CTL, 0);
45 udelay(1);
46
47 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
48 bcma_aread32(core, BCMA_IOCTL);
49 udelay(1);
50
51 return 0;
52 }
53 EXPORT_SYMBOL_GPL(bcma_core_enable);
54
bcma_core_set_clockmode(struct bcma_device * core,enum bcma_clkmode clkmode)55 void bcma_core_set_clockmode(struct bcma_device *core,
56 enum bcma_clkmode clkmode)
57 {
58 u16 i;
59
60 WARN_ON(core->id.id != BCMA_CORE_CHIPCOMMON &&
61 core->id.id != BCMA_CORE_PCIE &&
62 core->id.id != BCMA_CORE_80211);
63
64 switch (clkmode) {
65 case BCMA_CLKMODE_FAST:
66 bcma_set32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
67 udelay(64);
68 for (i = 0; i < 1500; i++) {
69 if (bcma_read32(core, BCMA_CLKCTLST) &
70 BCMA_CLKCTLST_HAVEHT) {
71 i = 0;
72 break;
73 }
74 udelay(10);
75 }
76 if (i)
77 pr_err("HT force timeout\n");
78 break;
79 case BCMA_CLKMODE_DYNAMIC:
80 pr_warn("Dynamic clockmode not supported yet!\n");
81 break;
82 }
83 }
84 EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);
85
bcma_core_pll_ctl(struct bcma_device * core,u32 req,u32 status,bool on)86 void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
87 {
88 u16 i;
89
90 WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ);
91 WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST);
92
93 if (on) {
94 bcma_set32(core, BCMA_CLKCTLST, req);
95 for (i = 0; i < 10000; i++) {
96 if ((bcma_read32(core, BCMA_CLKCTLST) & status) ==
97 status) {
98 i = 0;
99 break;
100 }
101 udelay(10);
102 }
103 if (i)
104 pr_err("PLL enable timeout\n");
105 } else {
106 pr_warn("Disabling PLL not supported yet!\n");
107 }
108 }
109 EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);
110
bcma_core_dma_translation(struct bcma_device * core)111 u32 bcma_core_dma_translation(struct bcma_device *core)
112 {
113 switch (core->bus->hosttype) {
114 case BCMA_HOSTTYPE_SOC:
115 return 0;
116 case BCMA_HOSTTYPE_PCI:
117 if (bcma_aread32(core, BCMA_IOST) & BCMA_IOST_DMA64)
118 return BCMA_DMA_TRANSLATION_DMA64_CMT;
119 else
120 return BCMA_DMA_TRANSLATION_DMA32_CMT;
121 default:
122 pr_err("DMA translation unknown for host %d\n",
123 core->bus->hosttype);
124 }
125 return BCMA_DMA_TRANSLATION_NONE;
126 }
127 EXPORT_SYMBOL(bcma_core_dma_translation);
128