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Fleshing out CGU driver

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2439 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2009-12-27 18:49:32 +00:00
parent 96e13d651d
commit db8ed56af4
4 changed files with 338 additions and 41 deletions
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4
arch/arm/src/lpc313x/Make.defs
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@ -46,7 +46,7 @@ CMN_CSRCS = up_assert.c up_blocktask.c up_copystate.c up_createstack.c \
up_undefinedinsn.c up_usestack.c
CGU_ASRCS =
CGU_CSRCS = lpc313x_clkdomain.c
CGU_CSRCS = lpc313x_clkdomain.c lpc313x_fdcndx.c lpc313x_esrndx.c
CHIP_ASRCS =
CHIP_ASRCS = $(CGU_ASRCS)
CHIP_CSRCS = lpc313x_irq.c lpc313x_allocateheap.c $(CGU_CSRCS)

114
arch/arm/src/lpc313x/lpc313x_cgudrvr.h
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@ -105,68 +105,69 @@
#define CLKID_SYSCLKO_LAST CLKID_SYSCLKO
#define _D11B(id) _RBIT(id,CLKID_SYSCLKO_FIRST)
#define CGU_NDOMAINS 12
#define CLKID_INVALIDCLK -1
#define CLKID_INVALIDDOMAIN -1
#define CGU_NDOMAINS 12 /* The number of clock domains */
#define CLKID_INVALIDCLK -1 /* Indicates and invalid clock ID */
#define DOMAINID_INVALID -1 /* Indicates an invalid domain ID */
#define ESRNDX_INVALID -1 /* Indicates an invalid ESR register index */
/* The number of fractional dividers available for each base frequency,
* their bit widths and extractions for sub elements from the fractional
* divider configuration register
/* There are 24 fractional dividers, indexed 0 to 23. The following definitions
* provide (1) the number of fractional dividers available for each base frequency,
* (2) start and end indices, and (3) extraction info for sub elements from the
* fractional divider configuration register
*/
#define FRACDIV_BASE0_CNT 7
#define FRACDIV_BASE0_LOW 0
#define FRACDIV_BASE0_HIGH 6
#define FRACDIV_BASE0_CNT 7 /* 7 fractional dividers available */
#define FRACDIV_BASE0_LOW 0 /* First is index 0 */
#define FRACDIV_BASE0_HIGH 6 /* Last is index 6 */
#define FRACDIV_BASE0_FDIV0W 8
#define FRACDIV_BASE1_CNT 2
#define FRACDIV_BASE1_LOW 7
#define FRACDIV_BASE1_HIGH 8
#define FRACDIV_BASE1_CNT 2 /* 2 fractional dividers available */
#define FRACDIV_BASE1_LOW 7 /* First is index 7 */
#define FRACDIV_BASE1_HIGH 8 /* Last is index 8 */
#define FRACDIV_BASE1_FDIV0W 8
#define FRACDIV_BASE2_CNT 2
#define FRACDIV_BASE2_LOW 9
#define FRACDIV_BASE2_HIGH 10
#define FRACDIV_BASE2_CNT 2 /* 2 fractional dividers available */
#define FRACDIV_BASE2_LOW 9 /* First is index 9 */
#define FRACDIV_BASE2_HIGH 10 /* Last is index 10 */
#define FRACDIV_BASE2_FDIV0W 8
#define FRACDIV_BASE3_CNT 3
#define FRACDIV_BASE3_LOW 11
#define FRACDIV_BASE3_HIGH 13
#define FRACDIV_BASE3_CNT 3 /* 3 fractional dividers available */
#define FRACDIV_BASE3_LOW 11 /* First is index 11 */
#define FRACDIV_BASE3_HIGH 13 /* Last is index 12 */
#define FRACDIV_BASE3_FDIV0W 8
#define FRACDIV_BASE4_CNT 1
#define FRACDIV_BASE4_LOW 14
#define FRACDIV_BASE4_HIGH 14
#define FRACDIV_BASE4_CNT 1 /* 1 fractional divider available */
#define FRACDIV_BASE4_LOW 14 /* First is index 14 */
#define FRACDIV_BASE4_HIGH 14 /* Last is index 14 */
#define FRACDIV_BASE4_FDIV0W 8
#define FRACDIV_BASE5_CNT 1
#define FRACDIV_BASE5_LOW 15
#define FRACDIV_BASE5_HIGH 15
#define FRACDIV_BASE5_CNT 1 /* 1 fractional divider available */
#define FRACDIV_BASE5_LOW 15 /* First is index 15 */
#define FRACDIV_BASE5_HIGH 15 /* Last is index 15 */
#define FRACDIV_BASE5_FDIV0W 8
#define FRACDIV_BASE6_CNT 1
#define FRACDIV_BASE6_LOW 16
#define FRACDIV_BASE6_HIGH 16
#define FRACDIV_BASE6_CNT 1 /* 1 fractional divider available */
#define FRACDIV_BASE6_LOW 16 /* First is index 16 */
#define FRACDIV_BASE6_HIGH 16 /* Last is index 16 */
#define FRACDIV_BASE6_FDIV0W 8
#define FRACDIV_BASE7_CNT 6
#define FRACDIV_BASE7_LOW 17
#define FRACDIV_BASE7_HIGH 22
#define FRACDIV_BASE7_CNT 6 /* 6 fractional dividers available */
#define FRACDIV_BASE7_LOW 17 /* First is index 17 */
#define FRACDIV_BASE7_HIGH 22 /* Last is index 22 */
#define FRACDIV_BASE7_FDIV0W 13
#define FRACDIV_BASE8_CNT 0
#define FRACDIV_BASE9_CNT 0
#define FRACDIV_BASE8_CNT 0 /* No fractional divider available */
#define FRACDIV_BASE9_CNT 0 /* No fractional divider available */
#define FRACDIV_BASE10_CNT 1
#define FRACDIV_BASE10_LOW 23
#define FRACDIV_BASE10_HIGH 23
#define FRACDIV_BASE10_CNT 1 /* 1 fractional divider available */
#define FRACDIV_BASE10_LOW 23 /* First is index 23 */
#define FRACDIV_BASE10_HIGH 23 /* Last is index 23 */
#define FRACDIV_BASE10_FDIV0W 8
#define FRACDIV_BASE11_CNT 0
#define FRACDIV_BASE11_CNT 0 /* No fractional divider available */
#define CGU_NDOMAINS 12
#define CLKID_INVALIDCLK -1
#define CLKID_INVALIDDOMAIN -1
#define FDCNDX_INVALID -1 /* Indicates an invalid fractional
* divider index */
/************************************************************************
* Public Types
@ -376,6 +377,41 @@ static inline void lpc313x_disableclock(enum lpc313x_clockid_e clkid)
EXTERN enum lpc313x_domainid_e lpc313x_clkdomain(enum lpc313x_clockid_e clkid);
/************************************************************************
* Name: lp313x_esrndx
*
* Description:
* Given a clock ID, return the index of the corresponding ESR
* register (or ESRNDX_INVALID if there is no ESR associated with
* this clock ID). Indexing of ESRs differs slightly from the clock
* ID: There are 92 clock IDs but only 89 ESR regisers. There are no
* ESR registers for :
*
*
* CLKID_I2SRXBCK0 Clock ID 87: I2SRX_BCK0
* CLKID_I2SRXBCK1, Clock ID 88: I2SRX_BCK1
*
* and
*
* CLKID_SYSCLKO Clock ID 91: SYSCLK_O
*
************************************************************************/
EXTERN int lp313x_esrndx(enum lpc313x_clockid_e clkid);
/************************************************************************
* Name: lpc313x_fdcndx
*
* Description:
* Given a clock ID and its domain ID, return the index of the
* corresponding fractional divider register (or FDCNDX_INVALID if
* there is no fractional divider associated with this clock).
*
************************************************************************/
EXTERN int lpc313x_fdcndx(enum lpc313x_clockid_e clkid,
enum lpc313x_domainid_e dmnid);
#undef EXTERN
#ifdef __cplusplus
}

134
arch/arm/src/lpc313x/lpc313x_esrndx.c Executable file
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@ -0,0 +1,134 @@
/************************************************************************
* arch/arm/src/lpc313x/lpc313x_esrndx.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* References:
* - UM10314 LPC3130/31 User manual Rev. 1.01 — 9 September 2009
* - lpc313x.cdl.drivers.zip example driver code
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include "up_arch.h"
#include "lpc313x_cgudrvr.h"
/************************************************************************
* Pre-processor Definitions
************************************************************************/
/************************************************************************
* Private Data
************************************************************************/
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: lp313x_esrndx
*
* Description:
* Given a clock ID, return the index of the corresponding ESR
* register (or ESRNDX_INVALID if there is no ESR associated with
* this clock ID). Indexing of ESRs differs slightly from the clock
* ID: There are 92 clock IDs but only 89 ESR regisers. There are no
* ESR registers for :
*
*
* CLKID_I2SRXBCK0 Clock ID 87: I2SRX_BCK0
* CLKID_I2SRXBCK1, Clock ID 88: I2SRX_BCK1
*
* and
*
* CLKID_SYSCLKO Clock ID 91: SYSCLK_O
*
************************************************************************/
int lp313x_esrndx(enum lpc313x_clockid_e clkid)
{
int esrndx = (int)clkid;
/* There ar 89 Enable Select Registers (ESR). Indexing for these
* registers is identical to indexing to other registers (like PCR),
* except that there are no ESR registers for
*
*
* CLKID_I2SRXBCK0 Clock ID 87: I2SRX_BCK0
* CLKID_I2SRXBCK1, Clock ID 88: I2SRX_BCK1
*
* and
*
* CLKID_SYSCLKO Clock ID 91: SYSCLK_O
*/
switch (clkid)
{
/* There are no ESR registers corresponding to the following
* three clocks:
*/
case CLKID_I2SRXBCK0:
case CLKID_I2SRXBCK1:
case CLKID_SYSCLKO:
esrndx = ESRNDX_INVALID;
break;
/* These clock IDs are a special case and need to be adjusted
* by two:
*
* CLKID_SPICLK Clock ID 89, ESR index 87
* CLKID_SPICLKGATED Clock ID 90, ESR index 88
*/
case CLKID_SPICLK:
case CLKID_SPICLKGATED:
esrndx = esrndx - 2;
break;
/* The rest of the indices match up and we don't have to do anything. */
default:
break;
}
return esrndx;
}

127
arch/arm/src/lpc313x/lpc313x_fdcndx.c Executable file
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@ -0,0 +1,127 @@
/************************************************************************
* arch/arm/src/lpc313x/lpc313x_fdcndx.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* References:
* - UM10314 LPC3130/31 User manual Rev. 1.01 — 9 September 2009
* - lpc313x.cdl.drivers.zip example driver code
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
************************************************************************/
/************************************************************************
* Included Files
************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include "up_arch.h"
#include "lpc313x_cgudrvr.h"
/************************************************************************
* Pre-processor Definitions
************************************************************************/
/* The select register in the ESR registers vary in width from 1-3 bits.
* Below is a macro to select the widest case (which is OK because the
* undefined bits will be read as zero). Within the field, bits 0-7 to
* indicate the offset from the base FDC index.
*/
#define CGU_ESRSEL(n) (((n)>>1)&7)
/************************************************************************
* Private Data
************************************************************************/
static const uint8_t g_fdcbase[CGU_NDOMAINS] =
{
FRACDIV_BASE0_LOW, /* Domain 0: SYS_BASE */
FRACDIV_BASE1_LOW, /* Domain 1: AHB0APB0_BASE */
FRACDIV_BASE2_LOW, /* Domain 2: AHB0APB1_BASE */
FRACDIV_BASE3_LOW, /* Domain 3: AHB0APB2_BASE */
FRACDIV_BASE4_LOW, /* Domain 4: AHB0APB3_BASE */
FRACDIV_BASE5_LOW, /* Domain 5: PCM_BASE */
FRACDIV_BASE6_LOW, /* Domain 6: UART_BASE */
FRACDIV_BASE7_LOW, /* Domain 7: CLK1024FS_BASE */
0, /* Domain 8: BCK0_BASE (no ESR register) */
0, /* Domain 9: BCK1_BASE (no ESR register) */
FRACDIV_BASE10_LOW, /* Domain 10: SPI_BASE */
0, /* Domain 11: SYSCLKO_BASE (no ESR register) */
};
/************************************************************************
* Private Functions
************************************************************************/
/************************************************************************
* Public Functions
************************************************************************/
/************************************************************************
* Name: lpc313x_fdcndx
*
* Description:
* Given a clock ID and its domain ID, return the index of the
* corresponding fractional divider register (or FDCNDX_INVALID if
* there is no fractional divider associated with this clock).
*
************************************************************************/
int lpc313x_fdcndx(enum lpc313x_clockid_e clkid, enum lpc313x_domainid_e dmnid)
{
int esrndx;
int fdcndx = FDCNDX_INVALID;
/* Check if there is an ESR register associate with this clock ID */
esrndx = lp313x_esrndx(clkid);
if (esrndx != ESRNDX_INVALID)
{
/* Read the clock's ESR to get the fractional divider */
uint32_t regval = getreg32(LPC313X_CGU_ESR_OFFSET(esrndx));
/* Check if any fractional divider is enabled for this clock. */
if ((regval & CGU_ESR_ESREN) != 0)
{
/* Yes.. The FDC index is an offset from this fractional
* divider base for this domain.
*/
fdcndx = CGU_ESRSEL(regval) + (int)g_fdcbase[dmnid];
}
}
return fdcndx;
}