diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc313x/lpc313x_clkinit.c')
-rwxr-xr-x | nuttx/arch/arm/src/lpc313x/lpc313x_clkinit.c | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/lpc313x/lpc313x_clkinit.c b/nuttx/arch/arm/src/lpc313x/lpc313x_clkinit.c new file mode 100755 index 000000000..779fc3a05 --- /dev/null +++ b/nuttx/arch/arm/src/lpc313x/lpc313x_clkinit.c @@ -0,0 +1,298 @@ +/************************************************************************************ + * arch/arm/src/lpc313x/lpc313x_clkinit.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <arch/board/board.h> + +#include "lpc313x_cgu.h" +#include "lpc313x_cgudrvr.h" + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/************************************************************************************ + * Private Types + ************************************************************************************/ + +/* This structure describes the configuration of one domain */ + +struct lpc313x_domainconfig_s +{ + enum lpc313x_domainid_e dmnid; /* Domain ID */ + uint32_t finsel; /* Frequency input selection */ + uint32_t clk1; /* ID of first clock in the domain */ + uint32_t nclks; /* Number of clocks in the domain */ + uint32_t fdiv1; /* First frequency divider in the domain */ + uint32_t nfdiv; /* Number of frequency dividers in the domain */ + const struct lpc313x_subdomainconfig_s* sub; /* Sub=domain array */ +}; + +/************************************************************************************ + * Private Data + ************************************************************************************/ + +/************************************************************************************ + * Public Data + ************************************************************************************/ + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: lpc313x_domaininit + * + * Description: + * Initialize one clock domain based on board-specific clock configuration data + * + ************************************************************************************/ + +static void lpc313x_domaininit(struct lpc313x_domainconfig_s* dmn) +{ + const struct lpc313x_subdomainconfig_s * sub = dmn->sub; + uint32_t fdivcfg; + uint32_t regaddr; + uint32_t regval; + int fdndx; + int clkndx; + int bcrndx = lp313x_bcrndx(dmn->dmnid); + int esrndx; + + if (bcrndx != BCRNDX_INVALID) + { + /* Disable BCR for domain */ + + regaddr = LPC313X_CGU_BCR(bcrndx); + putreg32(0, regaddr); + } + + /* Configure the fractional dividers in this domain */ + + for (fdndx = 0; fdndx < dmn->nfdiv; fdndx++, sub++) + { + /* Set fractional divider confiruation but don't enable it yet */ + + fdivcfg = lpc313x_fdivinit(fdndx + dmn->fdiv1, &sub->fdiv, false); + + /* Enable frac divider only if it has valid settings */ + + if (fdivcfg != 0) + { + /* Select the fractional dividir for each clock in this + * sub domain. + */ + + for (clkndx = 0; clkndx <= dmn->nclks; clkndx++) + { + /* Does this clock have an ESR register? */ + + esrndx = lp313x_esrndx((enum lpc313x_clockid_e)(clkndx + dmn->clk1)); + if (esrndx != ESRNDX_INVALID) + { + /* Yes.. Check if this clock belongs to this sub-domain */ + + if (sub->clkset & (1 << clkndx)) + { + /* Yes.. configure the clock to use this fractional divider */ + + regaddr = LPC313X_CGU_ESR(esrndx); + putreg32((fdndx << CGU_ESR_ESRSEL_SHIFT) | CGU_ESR_ESREN, regaddr); + } + } + } + + /* Enable the fractional divider */ + + regaddr = LPC313X_CGU_FDC(fdndx + dmn->fdiv1); + regval = getreg32(regaddr); + regval |= CGU_FDC_RUN; + putreg32(regval, regaddr); + } + } + + if (bcrndx != BCRNDX_INVALID) + { + /* Enable the BCR for domain */ + + regaddr = LPC313X_CGU_BCR(bcrndx); + putreg32(CGU_BCR_FDRUN, regaddr); + } + + /* Select input base clock for domain*/ + + lpc313x_selectfreqin(dmn->dmnid, dmn->finsel); +} + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: lpc313x_clkinit + * + * Description: + * Initialize all clock domains based on board-specific clock configuration data + * + ************************************************************************************/ + +void lpc313x_clkinit(const struct lpc313x_clkinit_s* cfg) +{ + struct lpc313x_domainconfig_s domain; + + /* Reset all clocks and connect them to FFAST */ + + lpc313x_resetclks(); + + /* Initialize Domain0 = SYS_BASE clocks */ + + domain.dmnid = DOMAINID_SYS; + domain.finsel = cfg->domain0.finsel; + domain.clk1 = CLKID_SYSBASE_FIRST; + domain.nclks = (CLKID_SYSBASE_LAST - CLKID_SYSBASE_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE0_LOW; + domain.nfdiv = FRACDIV_BASE0_CNT; + domain.sub = cfg->domain0.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain1 = AHB0APB0_BASE clocks */ + + domain.dmnid = DOMAINID_AHB0APB0; + domain.finsel = cfg->domain1.finsel; + domain.clk1 = CLKID_AHB0APB0_FIRST; + domain.nclks = (CLKID_AHB0APB0_LAST - CLKID_AHB0APB0_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE1_LOW; + domain.nfdiv = FRACDIV_BASE1_CNT; + domain.sub = cfg->domain1.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain2 = AHB0APB1_BASE clocks */ + + domain.dmnid = DOMAINID_AHB0APB1; + domain.finsel = cfg->domain2.finsel; + domain.clk1 = CLKID_AHB0APB1_FIRST; + domain.nclks = (CLKID_AHB0APB1_LAST - CLKID_AHB0APB1_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE2_LOW; + domain.nfdiv = FRACDIV_BASE2_CNT; + domain.sub = cfg->domain2.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain3 = AHB0APB2_BASE clocks */ + + domain.dmnid = DOMAINID_AHB0APB2; + domain.finsel = cfg->domain3.finsel; + domain.clk1 = CLKID_AHB0APB2_FIRST; + domain.nclks = (CLKID_AHB0APB2_LAST - CLKID_AHB0APB2_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE3_LOW; + domain.nfdiv = FRACDIV_BASE3_CNT; + domain.sub = cfg->domain3.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain4 = AHB0APB3_BASE clocks */ + + domain.dmnid = DOMAINID_AHB0APB3; + domain.finsel = cfg->domain4.finsel; + domain.clk1 = CLKID_AHB0APB3_FIRST; + domain.nclks = (CLKID_AHB0APB3_LAST - CLKID_AHB0APB3_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE4_LOW; + domain.nfdiv = FRACDIV_BASE4_CNT; + domain.sub = cfg->domain4.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain5 = PCM_BASE clocks */ + + domain.dmnid = DOMAINID_PCM; + domain.finsel = cfg->domain5.finsel; + domain.clk1 = CLKID_PCM_FIRST; + domain.nclks = 1; + domain.fdiv1 = FRACDIV_BASE5_LOW; + domain.nfdiv = FRACDIV_BASE5_CNT; + domain.sub = cfg->domain5.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain6 = UART_BASE clocks */ + + domain.dmnid = DOMAINID_UART; + domain.finsel = cfg->domain6.finsel; + domain.clk1 = CLKID_UART_FIRST; + domain.nclks = 1; + domain.fdiv1 = FRACDIV_BASE6_LOW; + domain.nfdiv = FRACDIV_BASE6_CNT; + domain.sub = cfg->domain6.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain7 = CLK1024FS_BASE clocks */ + + domain.dmnid = DOMAINID_CLK1024FS; + domain.finsel = cfg->domain7.finsel; + domain.clk1 = CLKID_CLK1024FS_FIRST; + domain.nclks = (CLKID_CLK1024FS_LAST - CLKID_CLK1024FS_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE7_LOW; + domain.nfdiv = FRACDIV_BASE7_CNT; + domain.sub = cfg->domain7.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain8 = I2SRX_BCK0_BASE clocks */ + + lpc313x_selectfreqin(DOMAINID_BCK0, cfg->domain8.finsel); + + /* Initialize Domain9 = I2SRX_BCK1_BASE clocks */ + + lpc313x_selectfreqin(DOMAINID_BCK1, cfg->domain9.finsel); + + /* Initialize Domain10 = SPI_BASE clocks */ + + domain.dmnid = DOMAINID_SPI; + domain.finsel = cfg->domain10.finsel; + domain.clk1 = CLKID_SPI_FIRST; + domain.nclks = (CLKID_SPI_LAST - CLKID_SPI_FIRST) + 1; + domain.fdiv1 = FRACDIV_BASE10_LOW; + domain.nfdiv = FRACDIV_BASE10_CNT; + domain.sub = cfg->domain10.sub; + lpc313x_domaininit(&domain); + + /* Initialize Domain11 = SYSCLK_O_BASE clocks */ + + lpc313x_selectfreqin(DOMAINID_SYSCLKO, cfg->domain11.finsel); + + /* Initialize Dynamic fractional dividers -- to be provided */ +} |