mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
6489412064
really need it. That would be almost everywhere it was included. Add it in a couple files that really do need it and were previously getting it by accident via another header.
309 lines
8.9 KiB
C
309 lines
8.9 KiB
C
/*
|
|
* Copyright (c) 2010
|
|
* Ben Gray <ben.r.gray@gmail.com>.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Ben Gray.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY BEN GRAY ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL BEN GRAY BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* Power, Reset and Clock Managment Module
|
|
*
|
|
* This is a very simple driver wrapper around the PRCM set of registers in
|
|
* the OMAP3 chip. It allows you to turn on and off things like the functional
|
|
* and interface clocks to the various on-chip modules.
|
|
*
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/cpufunc.h>
|
|
#include <machine/resource.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <arm/ti/ti_prcm.h>
|
|
|
|
/**
|
|
* ti_clk_devmap - Array of clock devices, should be defined one per SoC
|
|
*
|
|
* This array is typically defined in one of the targeted *_prcm_clk.c
|
|
* files and is specific to the given SoC platform. Each entry in the array
|
|
* corresponds to an individual clock device.
|
|
*/
|
|
extern struct ti_clock_dev ti_clk_devmap[];
|
|
|
|
/**
|
|
* ti_prcm_clk_dev - returns a pointer to the clock device with given id
|
|
* @clk: the ID of the clock device to get
|
|
*
|
|
* Simply iterates through the clk_devmap global array and returns a pointer
|
|
* to the clock device if found.
|
|
*
|
|
* LOCKING:
|
|
* None
|
|
*
|
|
* RETURNS:
|
|
* The pointer to the clock device on success, on failure NULL is returned.
|
|
*/
|
|
static struct ti_clock_dev *
|
|
ti_prcm_clk_dev(clk_ident_t clk)
|
|
{
|
|
struct ti_clock_dev *clk_dev;
|
|
|
|
/* Find the clock within the devmap - it's a bit inefficent having a for
|
|
* loop for this, but this function should only called when a driver is
|
|
* being activated so IMHO not a big issue.
|
|
*/
|
|
clk_dev = &(ti_clk_devmap[0]);
|
|
while (clk_dev->id != INVALID_CLK_IDENT) {
|
|
if (clk_dev->id == clk) {
|
|
return (clk_dev);
|
|
}
|
|
clk_dev++;
|
|
}
|
|
|
|
/* Sanity check we managed to find the clock */
|
|
printf("ti_prcm: Failed to find clock device (%d)\n", clk);
|
|
return (NULL);
|
|
}
|
|
|
|
/**
|
|
* ti_prcm_clk_valid - enables a clock for a particular module
|
|
* @clk: identifier for the module to enable, see ti_prcm.h for a list
|
|
* of possible modules.
|
|
* Example: OMAP3_MODULE_MMC1_ICLK or OMAP3_MODULE_GPTIMER10_FCLK.
|
|
*
|
|
* This function can enable either a functional or interface clock.
|
|
*
|
|
* The real work done to enable the clock is really done in the callback
|
|
* function associated with the clock, this function is simply a wrapper
|
|
* around that.
|
|
*
|
|
* LOCKING:
|
|
* Internally locks the driver context.
|
|
*
|
|
* RETURNS:
|
|
* Returns 0 on success or positive error code on failure.
|
|
*/
|
|
int
|
|
ti_prcm_clk_valid(clk_ident_t clk)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (ti_prcm_clk_dev(clk) == NULL)
|
|
ret = EINVAL;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/**
|
|
* ti_prcm_clk_enable - enables a clock for a particular module
|
|
* @clk: identifier for the module to enable, see ti_prcm.h for a list
|
|
* of possible modules.
|
|
* Example: OMAP3_MODULE_MMC1_ICLK or OMAP3_MODULE_GPTIMER10_FCLK.
|
|
*
|
|
* This function can enable either a functional or interface clock.
|
|
*
|
|
* The real work done to enable the clock is really done in the callback
|
|
* function associated with the clock, this function is simply a wrapper
|
|
* around that.
|
|
*
|
|
* LOCKING:
|
|
* Internally locks the driver context.
|
|
*
|
|
* RETURNS:
|
|
* Returns 0 on success or positive error code on failure.
|
|
*/
|
|
int
|
|
ti_prcm_clk_enable(clk_ident_t clk)
|
|
{
|
|
struct ti_clock_dev *clk_dev;
|
|
int ret;
|
|
|
|
/* Find the clock within the devmap - it's a bit inefficent having a for
|
|
* loop for this, but this function should only called when a driver is
|
|
* being activated so IMHO not a big issue.
|
|
*/
|
|
clk_dev = ti_prcm_clk_dev(clk);
|
|
|
|
/* Sanity check we managed to find the clock */
|
|
if (clk_dev == NULL)
|
|
return (EINVAL);
|
|
|
|
/* Activate the clock */
|
|
if (clk_dev->clk_activate)
|
|
ret = clk_dev->clk_activate(clk_dev);
|
|
else
|
|
ret = EINVAL;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/**
|
|
* ti_prcm_clk_disable - disables a clock for a particular module
|
|
* @clk: identifier for the module to enable, see ti_prcm.h for a list
|
|
* of possible modules.
|
|
* Example: OMAP3_MODULE_MMC1_ICLK or OMAP3_MODULE_GPTIMER10_FCLK.
|
|
*
|
|
* This function can enable either a functional or interface clock.
|
|
*
|
|
* The real work done to enable the clock is really done in the callback
|
|
* function associated with the clock, this function is simply a wrapper
|
|
* around that.
|
|
*
|
|
* LOCKING:
|
|
* Internally locks the driver context.
|
|
*
|
|
* RETURNS:
|
|
* Returns 0 on success or positive error code on failure.
|
|
*/
|
|
int
|
|
ti_prcm_clk_disable(clk_ident_t clk)
|
|
{
|
|
struct ti_clock_dev *clk_dev;
|
|
int ret;
|
|
|
|
/* Find the clock within the devmap - it's a bit inefficent having a for
|
|
* loop for this, but this function should only called when a driver is
|
|
* being activated so IMHO not a big issue.
|
|
*/
|
|
clk_dev = ti_prcm_clk_dev(clk);
|
|
|
|
/* Sanity check we managed to find the clock */
|
|
if (clk_dev == NULL)
|
|
return (EINVAL);
|
|
|
|
/* Activate the clock */
|
|
if (clk_dev->clk_deactivate)
|
|
ret = clk_dev->clk_deactivate(clk_dev);
|
|
else
|
|
ret = EINVAL;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/**
|
|
* ti_prcm_clk_set_source - sets the source
|
|
* @clk: identifier for the module to enable, see ti_prcm.h for a list
|
|
* of possible modules.
|
|
* Example: OMAP3_MODULE_MMC1_ICLK or OMAP3_MODULE_GPTIMER10_FCLK.
|
|
*
|
|
* This function can enable either a functional or interface clock.
|
|
*
|
|
* The real work done to enable the clock is really done in the callback
|
|
* function associated with the clock, this function is simply a wrapper
|
|
* around that.
|
|
*
|
|
* LOCKING:
|
|
* Internally locks the driver context.
|
|
*
|
|
* RETURNS:
|
|
* Returns 0 on success or positive error code on failure.
|
|
*/
|
|
int
|
|
ti_prcm_clk_set_source(clk_ident_t clk, clk_src_t clksrc)
|
|
{
|
|
struct ti_clock_dev *clk_dev;
|
|
int ret;
|
|
|
|
/* Find the clock within the devmap - it's a bit inefficent having a for
|
|
* loop for this, but this function should only called when a driver is
|
|
* being activated so IMHO not a big issue.
|
|
*/
|
|
clk_dev = ti_prcm_clk_dev(clk);
|
|
|
|
/* Sanity check we managed to find the clock */
|
|
if (clk_dev == NULL)
|
|
return (EINVAL);
|
|
|
|
/* Activate the clock */
|
|
if (clk_dev->clk_set_source)
|
|
ret = clk_dev->clk_set_source(clk_dev, clksrc);
|
|
else
|
|
ret = EINVAL;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
|
|
/**
|
|
* ti_prcm_clk_get_source_freq - gets the source clock frequency
|
|
* @clk: identifier for the module to enable, see ti_prcm.h for a list
|
|
* of possible modules.
|
|
* @freq: pointer to an integer that upon return will contain the src freq
|
|
*
|
|
* This function returns the frequency of the source clock.
|
|
*
|
|
* The real work done to enable the clock is really done in the callback
|
|
* function associated with the clock, this function is simply a wrapper
|
|
* around that.
|
|
*
|
|
* LOCKING:
|
|
* Internally locks the driver context.
|
|
*
|
|
* RETURNS:
|
|
* Returns 0 on success or positive error code on failure.
|
|
*/
|
|
int
|
|
ti_prcm_clk_get_source_freq(clk_ident_t clk, unsigned int *freq)
|
|
{
|
|
struct ti_clock_dev *clk_dev;
|
|
int ret;
|
|
|
|
/* Find the clock within the devmap - it's a bit inefficent having a for
|
|
* loop for this, but this function should only called when a driver is
|
|
* being activated so IMHO not a big issue.
|
|
*/
|
|
clk_dev = ti_prcm_clk_dev(clk);
|
|
|
|
/* Sanity check we managed to find the clock */
|
|
if (clk_dev == NULL)
|
|
return (EINVAL);
|
|
|
|
/* Get the source frequency of the clock */
|
|
if (clk_dev->clk_get_source_freq)
|
|
ret = clk_dev->clk_get_source_freq(clk_dev, freq);
|
|
else
|
|
ret = EINVAL;
|
|
|
|
return (ret);
|
|
}
|