Eric Lee / smarc-fsl-linux-kernel

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drivers/bcma/core.c 2.85 KB
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8369ae33b   Rafał Miłecki   bcma: add Broadco... 
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  /*
   * Broadcom specific AMBA
   * Core ops
   *
   * Licensed under the GNU/GPL. See COPYING for details.
   */
  
  #include "bcma_private.h"
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  #include <linux/export.h>
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  #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);
e3ae0cac0   Arend van Spriel   drivers: bcma: ex... 
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  void bcma_core_disable(struct bcma_device *core, u32 flags)
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  {
  	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);
  }
e3ae0cac0   Arend van Spriel   drivers: bcma: ex... 
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  EXPORT_SYMBOL_GPL(bcma_core_disable);
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  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);
7424dd0d0   Rafał Miłecki   bcma: allow setti... 
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  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
  ");
  		break;
  	case BCMA_CLKMODE_DYNAMIC:
  		pr_warn("Dynamic clockmode not supported yet!
  ");
  		break;
  	}
  }
  EXPORT_SYMBOL_GPL(bcma_core_set_clockmode);
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  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
  ");
  	} else {
  		pr_warn("Disabling PLL not supported yet!
  ");
  	}
  }
  EXPORT_SYMBOL_GPL(bcma_core_pll_ctl);
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  u32 bcma_core_dma_translation(struct bcma_device *core)
  {
  	switch (core->bus->hosttype) {
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  	case BCMA_HOSTTYPE_SOC:
  		return 0;
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  	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
  ",
  		       core->bus->hosttype);
  	}
  	return BCMA_DMA_TRANSLATION_NONE;
  }
  EXPORT_SYMBOL(bcma_core_dma_translation);