blob: 4af6f4f06e8213becd436b6ad528ce1b162ae1db [file] [log] [blame]
/*
* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <asm/arch/clock.h>
#include <asm/arch/common.h>
#include <asm/div64.h>
#include "crm_regs.h"
static struct clk ckil_clk;
static struct clk mpll_clk;
static struct clk mpll_main_clk[];
static struct clk spll_clk;
static int _clk_enable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(clk->enable_reg);
reg |= 1 << clk->enable_shift;
__raw_writel(reg, clk->enable_reg);
return 0;
}
static void _clk_disable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(clk->enable_reg);
reg &= ~(1 << clk->enable_shift);
__raw_writel(reg, clk->enable_reg);
}
static int _clk_spll_enable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(CCM_CSCR);
reg |= CCM_CSCR_SPEN;
__raw_writel(reg, CCM_CSCR);
while ((__raw_readl(CCM_SPCTL1) & CCM_SPCTL1_LF) == 0)
;
return 0;
}
static void _clk_spll_disable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(CCM_CSCR);
reg &= ~CCM_CSCR_SPEN;
__raw_writel(reg, CCM_CSCR);
}
static void _clk_pccr01_enable(unsigned long mask0, unsigned long mask1)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR0);
reg |= mask0;
__raw_writel(reg, CCM_PCCR0);
reg = __raw_readl(CCM_PCCR1);
reg |= mask1;
__raw_writel(reg, CCM_PCCR1);
}
static void _clk_pccr01_disable(unsigned long mask0, unsigned long mask1)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR0);
reg &= ~mask0;
__raw_writel(reg, CCM_PCCR0);
reg = __raw_readl(CCM_PCCR1);
reg &= ~mask1;
__raw_writel(reg, CCM_PCCR1);
}
static void _clk_pccr10_enable(unsigned long mask1, unsigned long mask0)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR1);
reg |= mask1;
__raw_writel(reg, CCM_PCCR1);
reg = __raw_readl(CCM_PCCR0);
reg |= mask0;
__raw_writel(reg, CCM_PCCR0);
}
static void _clk_pccr10_disable(unsigned long mask1, unsigned long mask0)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR1);
reg &= ~mask1;
__raw_writel(reg, CCM_PCCR1);
reg = __raw_readl(CCM_PCCR0);
reg &= ~mask0;
__raw_writel(reg, CCM_PCCR0);
}
static int _clk_dma_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_DMA_MASK, CCM_PCCR1_HCLK_DMA_MASK);
return 0;
}
static void _clk_dma_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_DMA_MASK, CCM_PCCR1_HCLK_DMA_MASK);
}
static int _clk_rtic_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_RTIC_MASK, CCM_PCCR1_HCLK_RTIC_MASK);
return 0;
}
static void _clk_rtic_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_RTIC_MASK, CCM_PCCR1_HCLK_RTIC_MASK);
}
static int _clk_emma_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_EMMA_MASK, CCM_PCCR1_HCLK_EMMA_MASK);
return 0;
}
static void _clk_emma_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_EMMA_MASK, CCM_PCCR1_HCLK_EMMA_MASK);
}
static int _clk_slcdc_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_SLCDC_MASK, CCM_PCCR1_HCLK_SLCDC_MASK);
return 0;
}
static void _clk_slcdc_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_SLCDC_MASK, CCM_PCCR1_HCLK_SLCDC_MASK);
}
static int _clk_fec_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_FEC_MASK, CCM_PCCR1_HCLK_FEC_MASK);
return 0;
}
static void _clk_fec_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_FEC_MASK, CCM_PCCR1_HCLK_FEC_MASK);
}
static int _clk_vpu_enable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR1);
reg |= CCM_PCCR1_VPU_BAUD_MASK | CCM_PCCR1_HCLK_VPU_MASK;
__raw_writel(reg, CCM_PCCR1);
return 0;
}
static void _clk_vpu_disable(struct clk *clk)
{
unsigned long reg;
reg = __raw_readl(CCM_PCCR1);
reg &= ~(CCM_PCCR1_VPU_BAUD_MASK | CCM_PCCR1_HCLK_VPU_MASK);
__raw_writel(reg, CCM_PCCR1);
}
static int _clk_sahara2_enable(struct clk *clk)
{
_clk_pccr01_enable(CCM_PCCR0_SAHARA_MASK, CCM_PCCR1_HCLK_SAHARA_MASK);
return 0;
}
static void _clk_sahara2_disable(struct clk *clk)
{
_clk_pccr01_disable(CCM_PCCR0_SAHARA_MASK, CCM_PCCR1_HCLK_SAHARA_MASK);
}
static int _clk_mstick1_enable(struct clk *clk)
{
_clk_pccr10_enable(CCM_PCCR1_MSHC_BAUD_MASK, CCM_PCCR0_MSHC_MASK);
return 0;
}
static void _clk_mstick1_disable(struct clk *clk)
{
_clk_pccr10_disable(CCM_PCCR1_MSHC_BAUD_MASK, CCM_PCCR0_MSHC_MASK);
}
#define CSCR() (__raw_readl(CCM_CSCR))
#define PCDR0() (__raw_readl(CCM_PCDR0))
#define PCDR1() (__raw_readl(CCM_PCDR1))
static int _clk_cpu_set_parent(struct clk *clk, struct clk *parent)
{
int cscr = CSCR();
if (clk->parent == parent)
return 0;
if (mx27_revision() >= CHIP_REV_2_0) {
if (parent == &mpll_main_clk[0]) {
cscr |= CCM_CSCR_ARM_SRC;
} else {
if (parent == &mpll_main_clk[1])
cscr &= ~CCM_CSCR_ARM_SRC;
else
return -EINVAL;
}
__raw_writel(cscr, CCM_CSCR);
} else
return -ENODEV;
clk->parent = parent;
return 0;
}
static unsigned long _clk_cpu_round_rate(struct clk *clk, unsigned long rate)
{
int div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = parent_rate / rate;
if (parent_rate % rate)
div++;
if (div > 4)
div = 4;
return parent_rate / div;
}
static int _clk_cpu_set_rate(struct clk *clk, unsigned long rate)
{
unsigned int div;
uint32_t reg;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = parent_rate / rate;
if (div > 4 || div < 1 || ((parent_rate / div) != rate))
return -EINVAL;
div--;
reg = __raw_readl(CCM_CSCR);
if (mx27_revision() >= CHIP_REV_2_0) {
reg &= ~CCM_CSCR_ARM_MASK;
reg |= div << CCM_CSCR_ARM_OFFSET;
reg &= ~0x06;
__raw_writel(reg | 0x80000000, CCM_CSCR);
} else {
printk(KERN_ERR "Cant set CPU frequency!\n");
}
return 0;
}
static unsigned long _clk_perclkx_round_rate(struct clk *clk,
unsigned long rate)
{
u32 div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = parent_rate / rate;
if (parent_rate % rate)
div++;
if (div > 64)
div = 64;
return parent_rate / div;
}
static int _clk_perclkx_set_rate(struct clk *clk, unsigned long rate)
{
u32 reg;
u32 div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
if (clk->id < 0 || clk->id > 3)
return -EINVAL;
div = parent_rate / rate;
if (div > 64 || div < 1 || ((parent_rate / div) != rate))
return -EINVAL;
div--;
reg =
__raw_readl(CCM_PCDR1) & ~(CCM_PCDR1_PERDIV1_MASK <<
(clk->id << 3));
reg |= div << (clk->id << 3);
__raw_writel(reg, CCM_PCDR1);
return 0;
}
static unsigned long _clk_usb_recalc(struct clk *clk)
{
unsigned long usb_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
usb_pdf = (CSCR() & CCM_CSCR_USB_MASK) >> CCM_CSCR_USB_OFFSET;
return parent_rate / (usb_pdf + 1U);
}
static unsigned long _clk_ssi1_recalc(struct clk *clk)
{
unsigned long ssi1_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
ssi1_pdf = (PCDR0() & CCM_PCDR0_SSI1BAUDDIV_MASK) >>
CCM_PCDR0_SSI1BAUDDIV_OFFSET;
if (mx27_revision() >= CHIP_REV_2_0)
ssi1_pdf += 4;
else
ssi1_pdf = (ssi1_pdf < 2) ? 124UL : ssi1_pdf;
return 2UL * parent_rate / ssi1_pdf;
}
static unsigned long _clk_ssi2_recalc(struct clk *clk)
{
unsigned long ssi2_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
ssi2_pdf = (PCDR0() & CCM_PCDR0_SSI2BAUDDIV_MASK) >>
CCM_PCDR0_SSI2BAUDDIV_OFFSET;
if (mx27_revision() >= CHIP_REV_2_0)
ssi2_pdf += 4;
else
ssi2_pdf = (ssi2_pdf < 2) ? 124UL : ssi2_pdf;
return 2UL * parent_rate / ssi2_pdf;
}
static unsigned long _clk_nfc_recalc(struct clk *clk)
{
unsigned long nfc_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
if (mx27_revision() >= CHIP_REV_2_0) {
nfc_pdf =
(PCDR0() & CCM_PCDR0_NFCDIV2_MASK) >>
CCM_PCDR0_NFCDIV2_OFFSET;
} else {
nfc_pdf =
(PCDR0() & CCM_PCDR0_NFCDIV_MASK) >>
CCM_PCDR0_NFCDIV_OFFSET;
}
return parent_rate / (nfc_pdf + 1);
}
static unsigned long _clk_vpu_recalc(struct clk *clk)
{
unsigned long vpu_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
if (mx27_revision() >= CHIP_REV_2_0) {
vpu_pdf =
(PCDR0() & CCM_PCDR0_VPUDIV2_MASK) >>
CCM_PCDR0_VPUDIV2_OFFSET;
vpu_pdf += 4;
} else {
vpu_pdf =
(PCDR0() & CCM_PCDR0_VPUDIV_MASK) >>
CCM_PCDR0_VPUDIV_OFFSET;
vpu_pdf = (vpu_pdf < 2) ? 124 : vpu_pdf;
}
return 2UL * parent_rate / vpu_pdf;
}
static unsigned long _clk_parent_round_rate(struct clk *clk, unsigned long rate)
{
return clk->parent->round_rate(clk->parent, rate);
}
static int _clk_parent_set_rate(struct clk *clk, unsigned long rate)
{
return clk->parent->set_rate(clk->parent, rate);
}
/* in Hz */
static unsigned long external_high_reference = 26000000;
static unsigned long get_high_reference_clock_rate(struct clk *clk)
{
return external_high_reference;
}
/*
* the high frequency external clock reference
* Default case is 26MHz. Could be changed at runtime
* with a call to change_external_high_reference()
*/
static struct clk ckih_clk = {
.name = "ckih",
.get_rate = get_high_reference_clock_rate,
};
/* in Hz */
static unsigned long external_low_reference = 32768;
static unsigned long get_low_reference_clock_rate(struct clk *clk)
{
return external_low_reference;
}
/*
* the low frequency external clock reference
* Default case is 32.768kHz Could be changed at runtime
* with a call to change_external_low_reference()
*/
static struct clk ckil_clk = {
.name = "ckil",
.get_rate = get_low_reference_clock_rate,
};
static unsigned long get_mpll_clk(struct clk *clk)
{
uint32_t reg;
unsigned long ref_clk;
unsigned long mfi = 0, mfn = 0, mfd = 0, pdf = 0;
unsigned long long temp;
ref_clk = clk_get_rate(clk->parent);
reg = __raw_readl(CCM_MPCTL0);
pdf = (reg & CCM_MPCTL0_PD_MASK) >> CCM_MPCTL0_PD_OFFSET;
mfd = (reg & CCM_MPCTL0_MFD_MASK) >> CCM_MPCTL0_MFD_OFFSET;
mfi = (reg & CCM_MPCTL0_MFI_MASK) >> CCM_MPCTL0_MFI_OFFSET;
mfn = (reg & CCM_MPCTL0_MFN_MASK) >> CCM_MPCTL0_MFN_OFFSET;
mfi = (mfi <= 5) ? 5 : mfi;
temp = 2LL * ref_clk * mfn;
do_div(temp, mfd + 1);
temp = 2LL * ref_clk * mfi + temp;
do_div(temp, pdf + 1);
return (unsigned long)temp;
}
static struct clk mpll_clk = {
.name = "mpll",
.parent = &ckih_clk,
.get_rate = get_mpll_clk,
};
static unsigned long _clk_mpll_main_get_rate(struct clk *clk)
{
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
/* i.MX27 TO2:
* clk->id == 0: arm clock source path 1 which is from 2*MPLL/DIV_2
* clk->id == 1: arm clock source path 2 which is from 2*MPLL/DIV_3
*/
if (mx27_revision() >= CHIP_REV_2_0 && clk->id == 1)
return 2UL * parent_rate / 3UL;
return parent_rate;
}
static struct clk mpll_main_clk[] = {
{
/* For i.MX27 TO2, it is the MPLL path 1 of ARM core
* It provide the clock source whose rate is same as MPLL
*/
.name = "mpll_main",
.id = 0,
.parent = &mpll_clk,
.get_rate = _clk_mpll_main_get_rate
}, {
/* For i.MX27 TO2, it is the MPLL path 2 of ARM core
* It provide the clock source whose rate is same MPLL * 2/3
*/
.name = "mpll_main",
.id = 1,
.parent = &mpll_clk,
.get_rate = _clk_mpll_main_get_rate
}
};
static unsigned long get_spll_clk(struct clk *clk)
{
uint32_t reg;
unsigned long ref_clk;
unsigned long mfi = 0, mfn = 0, mfd = 0, pdf = 0;
unsigned long long temp;
ref_clk = clk_get_rate(clk->parent);
reg = __raw_readl(CCM_SPCTL0);
/*TODO: This is TO2 Bug */
if (mx27_revision() >= CHIP_REV_2_0)
__raw_writel(reg, CCM_SPCTL0);
pdf = (reg & CCM_SPCTL0_PD_MASK) >> CCM_SPCTL0_PD_OFFSET;
mfd = (reg & CCM_SPCTL0_MFD_MASK) >> CCM_SPCTL0_MFD_OFFSET;
mfi = (reg & CCM_SPCTL0_MFI_MASK) >> CCM_SPCTL0_MFI_OFFSET;
mfn = (reg & CCM_SPCTL0_MFN_MASK) >> CCM_SPCTL0_MFN_OFFSET;
mfi = (mfi <= 5) ? 5 : mfi;
temp = 2LL * ref_clk * mfn;
do_div(temp, mfd + 1);
temp = 2LL * ref_clk * mfi + temp;
do_div(temp, pdf + 1);
return (unsigned long)temp;
}
static struct clk spll_clk = {
.name = "spll",
.parent = &ckih_clk,
.get_rate = get_spll_clk,
.enable = _clk_spll_enable,
.disable = _clk_spll_disable,
};
static unsigned long get_cpu_clk(struct clk *clk)
{
u32 div;
unsigned long rate;
if (mx27_revision() >= CHIP_REV_2_0)
div = (CSCR() & CCM_CSCR_ARM_MASK) >> CCM_CSCR_ARM_OFFSET;
else
div = (CSCR() & CCM_CSCR_PRESC_MASK) >> CCM_CSCR_PRESC_OFFSET;
rate = clk_get_rate(clk->parent);
return rate / (div + 1);
}
static struct clk cpu_clk = {
.name = "cpu_clk",
.parent = &mpll_main_clk[1],
.set_parent = _clk_cpu_set_parent,
.round_rate = _clk_cpu_round_rate,
.get_rate = get_cpu_clk,
.set_rate = _clk_cpu_set_rate,
};
static unsigned long get_ahb_clk(struct clk *clk)
{
unsigned long rate;
unsigned long bclk_pdf;
if (mx27_revision() >= CHIP_REV_2_0)
bclk_pdf = (CSCR() & CCM_CSCR_AHB_MASK)
>> CCM_CSCR_AHB_OFFSET;
else
bclk_pdf = (CSCR() & CCM_CSCR_BCLK_MASK)
>> CCM_CSCR_BCLK_OFFSET;
rate = clk_get_rate(clk->parent);
return rate / (bclk_pdf + 1);
}
static struct clk ahb_clk = {
.name = "ahb_clk",
.parent = &mpll_main_clk[1],
.get_rate = get_ahb_clk,
};
static unsigned long get_ipg_clk(struct clk *clk)
{
unsigned long rate;
unsigned long ipg_pdf;
if (mx27_revision() >= CHIP_REV_2_0)
return clk_get_rate(clk->parent);
else
ipg_pdf = (CSCR() & CCM_CSCR_IPDIV) >> CCM_CSCR_IPDIV_OFFSET;
rate = clk_get_rate(clk->parent);
return rate / (ipg_pdf + 1);
}
static struct clk ipg_clk = {
.name = "ipg_clk",
.parent = &ahb_clk,
.get_rate = get_ipg_clk,
};
static unsigned long _clk_perclkx_recalc(struct clk *clk)
{
unsigned long perclk_pdf;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
if (clk->id < 0 || clk->id > 3)
return 0;
perclk_pdf = (PCDR1() >> (clk->id << 3)) & CCM_PCDR1_PERDIV1_MASK;
return parent_rate / (perclk_pdf + 1);
}
static struct clk per_clk[] = {
{
.name = "per_clk",
.id = 0,
.parent = &mpll_main_clk[1],
.get_rate = _clk_perclkx_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_PERCLK1_OFFSET,
.disable = _clk_disable,
}, {
.name = "per_clk",
.id = 1,
.parent = &mpll_main_clk[1],
.get_rate = _clk_perclkx_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_PERCLK2_OFFSET,
.disable = _clk_disable,
}, {
.name = "per_clk",
.id = 2,
.parent = &mpll_main_clk[1],
.round_rate = _clk_perclkx_round_rate,
.set_rate = _clk_perclkx_set_rate,
.get_rate = _clk_perclkx_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_PERCLK3_OFFSET,
.disable = _clk_disable,
}, {
.name = "per_clk",
.id = 3,
.parent = &mpll_main_clk[1],
.round_rate = _clk_perclkx_round_rate,
.set_rate = _clk_perclkx_set_rate,
.get_rate = _clk_perclkx_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_PERCLK4_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart1_clk[] = {
{
.name = "uart_clk",
.id = 0,
.parent = &per_clk[0],
.secondary = &uart1_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART1_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart2_clk[] = {
{
.name = "uart_clk",
.id = 1,
.parent = &per_clk[0],
.secondary = &uart2_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART2_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart3_clk[] = {
{
.name = "uart_clk",
.id = 2,
.parent = &per_clk[0],
.secondary = &uart3_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 2,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART3_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart4_clk[] = {
{
.name = "uart_clk",
.id = 3,
.parent = &per_clk[0],
.secondary = &uart4_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 3,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART4_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart5_clk[] = {
{
.name = "uart_clk",
.id = 4,
.parent = &per_clk[0],
.secondary = &uart5_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 4,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART5_OFFSET,
.disable = _clk_disable,
},
};
struct clk uart6_clk[] = {
{
.name = "uart_clk",
.id = 5,
.parent = &per_clk[0],
.secondary = &uart6_clk[1],
}, {
.name = "uart_ipg_clk",
.id = 5,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_UART6_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt1_clk[] = {
{
.name = "gpt_clk",
.id = 0,
.parent = &per_clk[0],
.secondary = &gpt1_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT1_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt2_clk[] = {
{
.name = "gpt_clk",
.id = 1,
.parent = &per_clk[0],
.secondary = &gpt2_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT2_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt3_clk[] = {
{
.name = "gpt_clk",
.id = 2,
.parent = &per_clk[0],
.secondary = &gpt3_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 2,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT3_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt4_clk[] = {
{
.name = "gpt_clk",
.id = 3,
.parent = &per_clk[0],
.secondary = &gpt4_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 3,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT4_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt5_clk[] = {
{
.name = "gpt_clk",
.id = 4,
.parent = &per_clk[0],
.secondary = &gpt5_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 4,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT5_OFFSET,
.disable = _clk_disable,
},
};
static struct clk gpt6_clk[] = {
{
.name = "gpt_clk",
.id = 5,
.parent = &per_clk[0],
.secondary = &gpt6_clk[1],
}, {
.name = "gpt_ipg_clk",
.id = 5,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_GPT6_OFFSET,
.disable = _clk_disable,
},
};
static struct clk pwm_clk[] = {
{
.name = "pwm_clk",
.parent = &per_clk[0],
.secondary = &pwm_clk[1],
}, {
.name = "pwm_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_PWM_OFFSET,
.disable = _clk_disable,
},
};
static struct clk sdhc1_clk[] = {
{
.name = "sdhc_clk",
.id = 0,
.parent = &per_clk[1],
.secondary = &sdhc1_clk[1],
}, {
.name = "sdhc_ipg_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SDHC1_OFFSET,
.disable = _clk_disable,
},
};
static struct clk sdhc2_clk[] = {
{
.name = "sdhc_clk",
.id = 1,
.parent = &per_clk[1],
.secondary = &sdhc2_clk[1],
}, {
.name = "sdhc_ipg_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SDHC2_OFFSET,
.disable = _clk_disable,
},
};
static struct clk sdhc3_clk[] = {
{
.name = "sdhc_clk",
.id = 2,
.parent = &per_clk[1],
.secondary = &sdhc3_clk[1],
}, {
.name = "sdhc_ipg_clk",
.id = 2,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SDHC3_OFFSET,
.disable = _clk_disable,
},
};
static struct clk cspi1_clk[] = {
{
.name = "cspi_clk",
.id = 0,
.parent = &per_clk[1],
.secondary = &cspi1_clk[1],
}, {
.name = "cspi_ipg_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_CSPI1_OFFSET,
.disable = _clk_disable,
},
};
static struct clk cspi2_clk[] = {
{
.name = "cspi_clk",
.id = 1,
.parent = &per_clk[1],
.secondary = &cspi2_clk[1],
}, {
.name = "cspi_ipg_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_CSPI2_OFFSET,
.disable = _clk_disable,
},
};
static struct clk cspi3_clk[] = {
{
.name = "cspi_clk",
.id = 2,
.parent = &per_clk[1],
.secondary = &cspi3_clk[1],
}, {
.name = "cspi_ipg_clk",
.id = 2,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_CSPI3_OFFSET,
.disable = _clk_disable,
},
};
static struct clk lcdc_clk[] = {
{
.name = "lcdc_clk",
.parent = &per_clk[2],
.secondary = &lcdc_clk[1],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
}, {
.name = "lcdc_ipg_clk",
.parent = &ipg_clk,
.secondary = &lcdc_clk[2],
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_LCDC_OFFSET,
.disable = _clk_disable,
}, {
.name = "lcdc_ahb_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_LCDC_OFFSET,
.disable = _clk_disable,
},
};
static struct clk csi_clk[] = {
{
.name = "csi_perclk",
.parent = &per_clk[3],
.secondary = &csi_clk[1],
.round_rate = _clk_parent_round_rate,
.set_rate = _clk_parent_set_rate,
}, {
.name = "csi_ahb_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_CSI_OFFSET,
.disable = _clk_disable,
},
};
static struct clk usb_clk[] = {
{
.name = "usb_clk",
.parent = &spll_clk,
.get_rate = _clk_usb_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_USBOTG_OFFSET,
.disable = _clk_disable,
}, {
.name = "usb_ahb_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_USBOTG_OFFSET,
.disable = _clk_disable,
}
};
static struct clk ssi1_clk[] = {
{
.name = "ssi_clk",
.id = 0,
.parent = &mpll_main_clk[1],
.secondary = &ssi1_clk[1],
.get_rate = _clk_ssi1_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_SSI1_BAUD_OFFSET,
.disable = _clk_disable,
}, {
.name = "ssi_ipg_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SSI1_IPG_OFFSET,
.disable = _clk_disable,
},
};
static struct clk ssi2_clk[] = {
{
.name = "ssi_clk",
.id = 1,
.parent = &mpll_main_clk[1],
.secondary = &ssi2_clk[1],
.get_rate = _clk_ssi2_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_SSI2_BAUD_OFFSET,
.disable = _clk_disable,
}, {
.name = "ssi_ipg_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SSI2_IPG_OFFSET,
.disable = _clk_disable,
},
};
static struct clk nfc_clk = {
.name = "nfc_clk",
.parent = &cpu_clk,
.get_rate = _clk_nfc_recalc,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_NFC_BAUD_OFFSET,
.disable = _clk_disable,
};
static struct clk vpu_clk = {
.name = "vpu_clk",
.parent = &mpll_main_clk[1],
.get_rate = _clk_vpu_recalc,
.enable = _clk_vpu_enable,
.disable = _clk_vpu_disable,
};
static struct clk dma_clk = {
.name = "dma_clk",
.parent = &ahb_clk,
.enable = _clk_dma_enable,
.disable = _clk_dma_disable,
};
static struct clk rtic_clk = {
.name = "rtic_clk",
.parent = &ahb_clk,
.enable = _clk_rtic_enable,
.disable = _clk_rtic_disable,
};
static struct clk brom_clk = {
.name = "brom_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_BROM_OFFSET,
.disable = _clk_disable,
};
static struct clk emma_clk = {
.name = "emma_clk",
.parent = &ahb_clk,
.enable = _clk_emma_enable,
.disable = _clk_emma_disable,
};
static struct clk slcdc_clk = {
.name = "slcdc_clk",
.parent = &ahb_clk,
.enable = _clk_slcdc_enable,
.disable = _clk_slcdc_disable,
};
static struct clk fec_clk = {
.name = "fec_clk",
.parent = &ahb_clk,
.enable = _clk_fec_enable,
.disable = _clk_fec_disable,
};
static struct clk emi_clk = {
.name = "emi_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_EMI_OFFSET,
.disable = _clk_disable,
};
static struct clk sahara2_clk = {
.name = "sahara_clk",
.parent = &ahb_clk,
.enable = _clk_sahara2_enable,
.disable = _clk_sahara2_disable,
};
static struct clk ata_clk = {
.name = "ata_clk",
.parent = &ahb_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_HCLK_ATA_OFFSET,
.disable = _clk_disable,
};
static struct clk mstick1_clk = {
.name = "mstick1_clk",
.parent = &ipg_clk,
.enable = _clk_mstick1_enable,
.disable = _clk_mstick1_disable,
};
static struct clk wdog_clk = {
.name = "wdog_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR1_WDT_OFFSET,
.disable = _clk_disable,
};
static struct clk gpio_clk = {
.name = "gpio_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR1,
.enable_shift = CCM_PCCR0_GPIO_OFFSET,
.disable = _clk_disable,
};
static struct clk i2c_clk[] = {
{
.name = "i2c_clk",
.id = 0,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_I2C1_OFFSET,
.disable = _clk_disable,
}, {
.name = "i2c_clk",
.id = 1,
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_I2C2_OFFSET,
.disable = _clk_disable,
},
};
static struct clk iim_clk = {
.name = "iim_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_IIM_OFFSET,
.disable = _clk_disable,
};
static struct clk kpp_clk = {
.name = "kpp_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_KPP_OFFSET,
.disable = _clk_disable,
};
static struct clk owire_clk = {
.name = "owire_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_OWIRE_OFFSET,
.disable = _clk_disable,
};
static struct clk rtc_clk = {
.name = "rtc_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_RTC_OFFSET,
.disable = _clk_disable,
};
static struct clk scc_clk = {
.name = "scc_clk",
.parent = &ipg_clk,
.enable = _clk_enable,
.enable_reg = CCM_PCCR0,
.enable_shift = CCM_PCCR0_SCC_OFFSET,
.disable = _clk_disable,
};
static unsigned long _clk_clko_round_rate(struct clk *clk, unsigned long rate)
{
u32 div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = parent_rate / rate;
if (parent_rate % rate)
div++;
if (div > 8)
div = 8;
return parent_rate / div;
}
static int _clk_clko_set_rate(struct clk *clk, unsigned long rate)
{
u32 reg;
u32 div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = parent_rate / rate;
if (div > 8 || div < 1 || ((parent_rate / div) != rate))
return -EINVAL;
div--;
reg = __raw_readl(CCM_PCDR0) & ~CCM_PCDR0_CLKODIV_MASK;
reg |= div << CCM_PCDR0_CLKODIV_OFFSET;
__raw_writel(reg, CCM_PCDR0);
return 0;
}
static unsigned long _clk_clko_recalc(struct clk *clk)
{
u32 div;
unsigned long parent_rate;
parent_rate = clk_get_rate(clk->parent);
div = __raw_readl(CCM_PCDR0) & CCM_PCDR0_CLKODIV_MASK >>
CCM_PCDR0_CLKODIV_OFFSET;
div++;
return parent_rate / div;
}
static int _clk_clko_set_parent(struct clk *clk, struct clk *parent)
{
u32 reg;
reg = __raw_readl(CCM_CCSR) & ~CCM_CCSR_CLKOSEL_MASK;
if (parent == &ckil_clk)
reg |= 0 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &ckih_clk)
reg |= 2 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == mpll_clk.parent)
reg |= 3 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == spll_clk.parent)
reg |= 4 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &mpll_clk)
reg |= 5 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &spll_clk)
reg |= 6 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &cpu_clk)
reg |= 7 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &ahb_clk)
reg |= 8 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &ipg_clk)
reg |= 9 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &per_clk[0])
reg |= 0xA << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &per_clk[1])
reg |= 0xB << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &per_clk[2])
reg |= 0xC << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &per_clk[3])
reg |= 0xD << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &ssi1_clk[0])
reg |= 0xE << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &ssi2_clk[0])
reg |= 0xF << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &nfc_clk)
reg |= 0x10 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &mstick1_clk)
reg |= 0x11 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &vpu_clk)
reg |= 0x12 << CCM_CCSR_CLKOSEL_OFFSET;
else if (parent == &usb_clk[0])
reg |= 0x15 << CCM_CCSR_CLKOSEL_OFFSET;
else
return -EINVAL;
__raw_writel(reg, CCM_CCSR);
return 0;
}
static int _clk_clko_enable(struct clk *clk)
{
u32 reg;
reg = __raw_readl(CCM_PCDR0) | CCM_PCDR0_CLKO_EN;
__raw_writel(reg, CCM_PCDR0);
return 0;
}
static void _clk_clko_disable(struct clk *clk)
{
u32 reg;
reg = __raw_readl(CCM_PCDR0) & ~CCM_PCDR0_CLKO_EN;
__raw_writel(reg, CCM_PCDR0);
}
static struct clk clko_clk = {
.name = "clko_clk",
.get_rate = _clk_clko_recalc,
.set_rate = _clk_clko_set_rate,
.round_rate = _clk_clko_round_rate,
.set_parent = _clk_clko_set_parent,
.enable = _clk_clko_enable,
.disable = _clk_clko_disable,
};
static struct clk *mxc_clks[] = {
&ckih_clk,
&ckil_clk,
&mpll_clk,
&mpll_main_clk[0],
&mpll_main_clk[1],
&spll_clk,
&cpu_clk,
&ahb_clk,
&ipg_clk,
&per_clk[0],
&per_clk[1],
&per_clk[2],
&per_clk[3],
&clko_clk,
&uart1_clk[0],
&uart1_clk[1],
&uart2_clk[0],
&uart2_clk[1],
&uart3_clk[0],
&uart3_clk[1],
&uart4_clk[0],
&uart4_clk[1],
&uart5_clk[0],
&uart5_clk[1],
&uart6_clk[0],
&uart6_clk[1],
&gpt1_clk[0],
&gpt1_clk[1],
&gpt2_clk[0],
&gpt2_clk[1],
&gpt3_clk[0],
&gpt3_clk[1],
&gpt4_clk[0],
&gpt4_clk[1],
&gpt5_clk[0],
&gpt5_clk[1],
&gpt6_clk[0],
&gpt6_clk[1],
&pwm_clk[0],
&pwm_clk[1],
&sdhc1_clk[0],
&sdhc1_clk[1],
&sdhc2_clk[0],
&sdhc2_clk[1],
&sdhc3_clk[0],
&sdhc3_clk[1],
&cspi1_clk[0],
&cspi1_clk[1],
&cspi2_clk[0],
&cspi2_clk[1],
&cspi3_clk[0],
&cspi3_clk[1],
&lcdc_clk[0],
&lcdc_clk[1],
&lcdc_clk[2],
&csi_clk[0],
&csi_clk[1],
&usb_clk[0],
&usb_clk[1],
&ssi1_clk[0],
&ssi1_clk[1],
&ssi2_clk[0],
&ssi2_clk[1],
&nfc_clk,
&vpu_clk,
&dma_clk,
&rtic_clk,
&brom_clk,
&emma_clk,
&slcdc_clk,
&fec_clk,
&emi_clk,
&sahara2_clk,
&ata_clk,
&mstick1_clk,
&wdog_clk,
&gpio_clk,
&i2c_clk[0],
&i2c_clk[1],
&iim_clk,
&kpp_clk,
&owire_clk,
&rtc_clk,
&scc_clk,
};
void __init change_external_low_reference(unsigned long new_ref)
{
external_low_reference = new_ref;
}
unsigned long __init clk_early_get_timer_rate(void)
{
return clk_get_rate(&per_clk[0]);
}
static void __init probe_mxc_clocks(void)
{
int i;
if (mx27_revision() >= CHIP_REV_2_0) {
if (CSCR() & 0x8000)
cpu_clk.parent = &mpll_main_clk[0];
if (!(CSCR() & 0x00800000))
ssi2_clk[0].parent = &spll_clk;
if (!(CSCR() & 0x00400000))
ssi1_clk[0].parent = &spll_clk;
if (!(CSCR() & 0x00200000))
vpu_clk.parent = &spll_clk;
} else {
cpu_clk.parent = &mpll_clk;
cpu_clk.set_parent = NULL;
cpu_clk.round_rate = NULL;
cpu_clk.set_rate = NULL;
ahb_clk.parent = &mpll_clk;
for (i = 0; i < sizeof(per_clk) / sizeof(per_clk[0]); i++)
per_clk[i].parent = &mpll_clk;
ssi1_clk[0].parent = &mpll_clk;
ssi2_clk[0].parent = &mpll_clk;
vpu_clk.parent = &mpll_clk;
}
}
/*
* must be called very early to get information about the
* available clock rate when the timer framework starts
*/
int __init mxc_clocks_init(unsigned long fref)
{
u32 cscr;
struct clk **clkp;
external_high_reference = fref;
/* detect clock reference for both system PLL */
cscr = CSCR();
if (cscr & CCM_CSCR_MCU)
mpll_clk.parent = &ckih_clk;
else
mpll_clk.parent = &ckil_clk;
if (cscr & CCM_CSCR_SP)
spll_clk.parent = &ckih_clk;
else
spll_clk.parent = &ckil_clk;
probe_mxc_clocks();
per_clk[0].enable(&per_clk[0]);
gpt1_clk[1].enable(&gpt1_clk[1]);
for (clkp = mxc_clks; clkp < mxc_clks + ARRAY_SIZE(mxc_clks); clkp++)
clk_register(*clkp);
/* Turn off all possible clocks */
__raw_writel(CCM_PCCR0_GPT1_MASK, CCM_PCCR0);
__raw_writel(CCM_PCCR1_PERCLK1_MASK | CCM_PCCR1_HCLK_EMI_MASK,
CCM_PCCR1);
spll_clk.disable(&spll_clk);
/* This will propagate to all children and init all the clock rates */
clk_enable(&emi_clk);
clk_enable(&gpio_clk);
clk_enable(&iim_clk);
clk_enable(&gpt1_clk[0]);
#ifdef CONFIG_DEBUG_LL_CONSOLE
clk_enable(&uart1_clk[0]);
#endif
return 0;
}