2 * Broadcom specific AMBA
5 * Licensed under the GNU/GPL. See COPYING for details.
8 #include "bcma_private.h"
9 #include <linux/export.h>
10 #include <linux/bcma/bcma.h>
12 static bool bcma_core_wait_value(struct bcma_device *core, u16 reg, u32 mask,
13 u32 value, int timeout)
15 unsigned long deadline = jiffies + timeout;
19 val = bcma_aread32(core, reg);
20 if ((val & mask) == value)
24 } while (!time_after_eq(jiffies, deadline));
26 bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
31 bool bcma_core_is_enabled(struct bcma_device *core)
33 if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
36 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
40 EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
42 void bcma_core_disable(struct bcma_device *core, u32 flags)
44 if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
47 bcma_core_wait_value(core, BCMA_RESET_ST, ~0, 0, 300);
49 bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
50 bcma_aread32(core, BCMA_RESET_CTL);
53 bcma_awrite32(core, BCMA_IOCTL, flags);
54 bcma_aread32(core, BCMA_IOCTL);
57 EXPORT_SYMBOL_GPL(bcma_core_disable);
59 int bcma_core_enable(struct bcma_device *core, u32 flags)
61 bcma_core_disable(core, flags);
63 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
64 bcma_aread32(core, BCMA_IOCTL);
66 bcma_awrite32(core, BCMA_RESET_CTL, 0);
67 bcma_aread32(core, BCMA_RESET_CTL);
70 bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
71 bcma_aread32(core, BCMA_IOCTL);
76 EXPORT_SYMBOL_GPL(bcma_core_enable);
78 void bcma_core_set_clockmode(struct bcma_device *core,
79 enum bcma_clkmode clkmode)
83 WARN_ON(core->id.id != BCMA_CORE_CHIPCOMMON &&
84 core->id.id != BCMA_CORE_PCIE &&
85 core->id.id != BCMA_CORE_80211);
88 case BCMA_CLKMODE_FAST:
89 bcma_set32(core, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
90 usleep_range(64, 300);
91 for (i = 0; i < 1500; i++) {
92 if (bcma_read32(core, BCMA_CLKCTLST) &
93 BCMA_CLKCTLST_HAVEHT) {
100 bcma_err(core->bus, "HT force timeout\n");
102 case BCMA_CLKMODE_DYNAMIC:
103 bcma_set32(core, BCMA_CLKCTLST, ~BCMA_CLKCTLST_FORCEHT);
107 EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);
109 void bcma_core_pll_ctl(struct bcma_device *core, u32 req, u32 status, bool on)
113 WARN_ON(req & ~BCMA_CLKCTLST_EXTRESREQ);
114 WARN_ON(status & ~BCMA_CLKCTLST_EXTRESST);
117 bcma_set32(core, BCMA_CLKCTLST, req);
118 for (i = 0; i < 10000; i++) {
119 if ((bcma_read32(core, BCMA_CLKCTLST) & status) ==
127 bcma_err(core->bus, "PLL enable timeout\n");
130 * Mask the PLL but don't wait for it to be disabled. PLL may be
131 * shared between cores and will be still up if there is another
134 bcma_mask32(core, BCMA_CLKCTLST, ~req);
135 bcma_read32(core, BCMA_CLKCTLST);
138 EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);
140 u32 bcma_core_dma_translation(struct bcma_device *core)
142 switch (core->bus->hosttype) {
143 case BCMA_HOSTTYPE_SOC:
145 case BCMA_HOSTTYPE_PCI:
146 if (bcma_aread32(core, BCMA_IOST) & BCMA_IOST_DMA64)
147 return BCMA_DMA_TRANSLATION_DMA64_CMT;
149 return BCMA_DMA_TRANSLATION_DMA32_CMT;
151 bcma_err(core->bus, "DMA translation unknown for host %d\n",
152 core->bus->hosttype);
154 return BCMA_DMA_TRANSLATION_NONE;
156 EXPORT_SYMBOL(bcma_core_dma_translation);