You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
313 lines
11 KiB
313 lines
11 KiB
/*
|
|
* arch/sh/kernel/cpu/sh4a/clock-sh7723.c
|
|
*
|
|
* SH7723 clock framework support
|
|
*
|
|
* Copyright (C) 2009 Magnus Damm
|
|
*
|
|
* 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
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/io.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/clkdev.h>
|
|
#include <linux/sh_clk.h>
|
|
#include <asm/clock.h>
|
|
#include <cpu/sh7723.h>
|
|
|
|
/* SH7723 registers */
|
|
#define FRQCR 0xa4150000
|
|
#define VCLKCR 0xa4150004
|
|
#define SCLKACR 0xa4150008
|
|
#define SCLKBCR 0xa415000c
|
|
#define IRDACLKCR 0xa4150018
|
|
#define PLLCR 0xa4150024
|
|
#define MSTPCR0 0xa4150030
|
|
#define MSTPCR1 0xa4150034
|
|
#define MSTPCR2 0xa4150038
|
|
#define DLLFRQ 0xa4150050
|
|
|
|
/* Fixed 32 KHz root clock for RTC and Power Management purposes */
|
|
static struct clk r_clk = {
|
|
.rate = 32768,
|
|
};
|
|
|
|
/*
|
|
* Default rate for the root input clock, reset this with clk_set_rate()
|
|
* from the platform code.
|
|
*/
|
|
struct clk extal_clk = {
|
|
.rate = 33333333,
|
|
};
|
|
|
|
/* The dll multiplies the 32khz r_clk, may be used instead of extal */
|
|
static unsigned long dll_recalc(struct clk *clk)
|
|
{
|
|
unsigned long mult;
|
|
|
|
if (__raw_readl(PLLCR) & 0x1000)
|
|
mult = __raw_readl(DLLFRQ);
|
|
else
|
|
mult = 0;
|
|
|
|
return clk->parent->rate * mult;
|
|
}
|
|
|
|
static struct sh_clk_ops dll_clk_ops = {
|
|
.recalc = dll_recalc,
|
|
};
|
|
|
|
static struct clk dll_clk = {
|
|
.ops = &dll_clk_ops,
|
|
.parent = &r_clk,
|
|
.flags = CLK_ENABLE_ON_INIT,
|
|
};
|
|
|
|
static unsigned long pll_recalc(struct clk *clk)
|
|
{
|
|
unsigned long mult = 1;
|
|
unsigned long div = 1;
|
|
|
|
if (__raw_readl(PLLCR) & 0x4000)
|
|
mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
|
|
else
|
|
div = 2;
|
|
|
|
return (clk->parent->rate * mult) / div;
|
|
}
|
|
|
|
static struct sh_clk_ops pll_clk_ops = {
|
|
.recalc = pll_recalc,
|
|
};
|
|
|
|
static struct clk pll_clk = {
|
|
.ops = &pll_clk_ops,
|
|
.flags = CLK_ENABLE_ON_INIT,
|
|
};
|
|
|
|
struct clk *main_clks[] = {
|
|
&r_clk,
|
|
&extal_clk,
|
|
&dll_clk,
|
|
&pll_clk,
|
|
};
|
|
|
|
static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
|
|
static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
|
|
|
|
static struct clk_div_mult_table div4_div_mult_table = {
|
|
.divisors = divisors,
|
|
.nr_divisors = ARRAY_SIZE(divisors),
|
|
.multipliers = multipliers,
|
|
.nr_multipliers = ARRAY_SIZE(multipliers),
|
|
};
|
|
|
|
static struct clk_div4_table div4_table = {
|
|
.div_mult_table = &div4_div_mult_table,
|
|
};
|
|
|
|
enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_NR };
|
|
|
|
#define DIV4(_reg, _bit, _mask, _flags) \
|
|
SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
|
|
|
|
struct clk div4_clks[DIV4_NR] = {
|
|
[DIV4_I] = DIV4(FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT),
|
|
[DIV4_U] = DIV4(FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT),
|
|
[DIV4_SH] = DIV4(FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT),
|
|
[DIV4_B] = DIV4(FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT),
|
|
[DIV4_B3] = DIV4(FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT),
|
|
[DIV4_P] = DIV4(FRQCR, 0, 0x0dbf, 0),
|
|
};
|
|
|
|
enum { DIV4_IRDA, DIV4_ENABLE_NR };
|
|
|
|
struct clk div4_enable_clks[DIV4_ENABLE_NR] = {
|
|
[DIV4_IRDA] = DIV4(IRDACLKCR, 0, 0x0dbf, 0),
|
|
};
|
|
|
|
enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR };
|
|
|
|
struct clk div4_reparent_clks[DIV4_REPARENT_NR] = {
|
|
[DIV4_SIUA] = DIV4(SCLKACR, 0, 0x0dbf, 0),
|
|
[DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x0dbf, 0),
|
|
};
|
|
enum { DIV6_V, DIV6_NR };
|
|
|
|
struct clk div6_clks[DIV6_NR] = {
|
|
[DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
|
|
};
|
|
|
|
static struct clk mstp_clks[] = {
|
|
/* See page 60 of Datasheet V1.0: Overview -> Block Diagram */
|
|
[HWBLK_TLB] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_IC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_OC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_L2C] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_ILMEM] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 27, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_FPU] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 24, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_INTC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 22, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_DMAC0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 21, 0),
|
|
[HWBLK_SHYWAY] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 20, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_HUDI] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
|
|
[HWBLK_UBC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 17, 0),
|
|
[HWBLK_TMU0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
|
|
[HWBLK_CMT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 14, 0),
|
|
[HWBLK_RWDT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 13, 0),
|
|
[HWBLK_DMAC1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 12, 0),
|
|
[HWBLK_TMU1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0),
|
|
[HWBLK_FLCTL] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
|
|
[HWBLK_SCIF0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
|
|
[HWBLK_SCIF1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
|
|
[HWBLK_SCIF2] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
|
|
[HWBLK_SCIF3] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 6, 0),
|
|
[HWBLK_SCIF4] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 5, 0),
|
|
[HWBLK_SCIF5] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 4, 0),
|
|
[HWBLK_MSIOF0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 2, 0),
|
|
[HWBLK_MSIOF1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 1, 0),
|
|
[HWBLK_MERAM] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 0, 0),
|
|
|
|
[HWBLK_IIC] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
|
|
[HWBLK_RTC] = SH_CLK_MSTP32(&r_clk, MSTPCR1, 8, 0),
|
|
|
|
[HWBLK_ATAPI] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR2, 28, 0),
|
|
[HWBLK_ADC] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 27, 0),
|
|
[HWBLK_TPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 25, 0),
|
|
[HWBLK_IRDA] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 24, 0),
|
|
[HWBLK_TSIF] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 22, 0),
|
|
[HWBLK_ICB] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 21, CLK_ENABLE_ON_INIT),
|
|
[HWBLK_SDHI0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 18, 0),
|
|
[HWBLK_SDHI1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 17, 0),
|
|
[HWBLK_KEYSC] = SH_CLK_MSTP32(&r_clk, MSTPCR2, 14, 0),
|
|
[HWBLK_USB] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 11, 0),
|
|
[HWBLK_2DG] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 10, 0),
|
|
[HWBLK_SIU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 8, 0),
|
|
[HWBLK_VEU2H1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 6, 0),
|
|
[HWBLK_VOU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 5, 0),
|
|
[HWBLK_BEU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 4, 0),
|
|
[HWBLK_CEU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 3, 0),
|
|
[HWBLK_VEU2H0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 2, 0),
|
|
[HWBLK_VPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 1, 0),
|
|
[HWBLK_LCDC] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 0, 0),
|
|
};
|
|
|
|
static struct clk_lookup lookups[] = {
|
|
/* main clocks */
|
|
CLKDEV_CON_ID("rclk", &r_clk),
|
|
CLKDEV_CON_ID("extal", &extal_clk),
|
|
CLKDEV_CON_ID("dll_clk", &dll_clk),
|
|
CLKDEV_CON_ID("pll_clk", &pll_clk),
|
|
|
|
/* DIV4 clocks */
|
|
CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
|
|
CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]),
|
|
CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
|
|
CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
|
|
CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]),
|
|
CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
|
|
CLKDEV_CON_ID("irda_clk", &div4_enable_clks[DIV4_IRDA]),
|
|
CLKDEV_CON_ID("siua_clk", &div4_reparent_clks[DIV4_SIUA]),
|
|
CLKDEV_CON_ID("siub_clk", &div4_reparent_clks[DIV4_SIUB]),
|
|
|
|
/* DIV6 clocks */
|
|
CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
|
|
|
|
/* MSTP clocks */
|
|
CLKDEV_CON_ID("tlb0", &mstp_clks[HWBLK_TLB]),
|
|
CLKDEV_CON_ID("ic0", &mstp_clks[HWBLK_IC]),
|
|
CLKDEV_CON_ID("oc0", &mstp_clks[HWBLK_OC]),
|
|
CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]),
|
|
CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]),
|
|
CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]),
|
|
CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]),
|
|
CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[HWBLK_DMAC0]),
|
|
CLKDEV_CON_ID("sh0", &mstp_clks[HWBLK_SHYWAY]),
|
|
CLKDEV_CON_ID("hudi0", &mstp_clks[HWBLK_HUDI]),
|
|
CLKDEV_CON_ID("ubc0", &mstp_clks[HWBLK_UBC]),
|
|
CLKDEV_ICK_ID("fck", "sh-cmt-32.0", &mstp_clks[HWBLK_CMT]),
|
|
CLKDEV_DEV_ID("sh-wdt.0", &mstp_clks[HWBLK_RWDT]),
|
|
CLKDEV_DEV_ID("sh-dma-engine.1", &mstp_clks[HWBLK_DMAC1]),
|
|
CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]),
|
|
CLKDEV_DEV_ID("spi_sh_msiof.0", &mstp_clks[HWBLK_MSIOF0]),
|
|
CLKDEV_DEV_ID("spi_sh_msiof.1", &mstp_clks[HWBLK_MSIOF1]),
|
|
CLKDEV_DEV_ID("sh_mobile_meram.0", &mstp_clks[HWBLK_MERAM]),
|
|
CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[HWBLK_IIC]),
|
|
CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]),
|
|
CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]),
|
|
CLKDEV_CON_ID("adc0", &mstp_clks[HWBLK_ADC]),
|
|
CLKDEV_CON_ID("tpu0", &mstp_clks[HWBLK_TPU]),
|
|
CLKDEV_CON_ID("irda0", &mstp_clks[HWBLK_IRDA]),
|
|
CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]),
|
|
CLKDEV_CON_ID("icb0", &mstp_clks[HWBLK_ICB]),
|
|
CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[HWBLK_SDHI0]),
|
|
CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[HWBLK_SDHI1]),
|
|
CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[HWBLK_KEYSC]),
|
|
CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB]),
|
|
CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
|
|
CLKDEV_DEV_ID("siu-pcm-audio", &mstp_clks[HWBLK_SIU]),
|
|
CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU2H1]),
|
|
CLKDEV_DEV_ID("sh-vou.0", &mstp_clks[HWBLK_VOU]),
|
|
CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]),
|
|
CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[HWBLK_CEU]),
|
|
CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU2H0]),
|
|
CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]),
|
|
|
|
CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[HWBLK_TMU0]),
|
|
CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[HWBLK_TMU1]),
|
|
|
|
CLKDEV_ICK_ID("fck", "sh-sci.0", &mstp_clks[HWBLK_SCIF0]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.1", &mstp_clks[HWBLK_SCIF1]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.2", &mstp_clks[HWBLK_SCIF2]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.3", &mstp_clks[HWBLK_SCIF3]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.4", &mstp_clks[HWBLK_SCIF4]),
|
|
CLKDEV_ICK_ID("fck", "sh-sci.5", &mstp_clks[HWBLK_SCIF5]),
|
|
|
|
CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[HWBLK_LCDC]),
|
|
};
|
|
|
|
int __init arch_clk_init(void)
|
|
{
|
|
int k, ret = 0;
|
|
|
|
/* autodetect extal or dll configuration */
|
|
if (__raw_readl(PLLCR) & 0x1000)
|
|
pll_clk.parent = &dll_clk;
|
|
else
|
|
pll_clk.parent = &extal_clk;
|
|
|
|
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
|
|
ret |= clk_register(main_clks[k]);
|
|
|
|
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
|
|
|
|
if (!ret)
|
|
ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
|
|
|
|
if (!ret)
|
|
ret = sh_clk_div4_enable_register(div4_enable_clks,
|
|
DIV4_ENABLE_NR, &div4_table);
|
|
|
|
if (!ret)
|
|
ret = sh_clk_div4_reparent_register(div4_reparent_clks,
|
|
DIV4_REPARENT_NR, &div4_table);
|
|
|
|
if (!ret)
|
|
ret = sh_clk_div6_register(div6_clks, DIV6_NR);
|
|
|
|
if (!ret)
|
|
ret = sh_clk_mstp_register(mstp_clks, HWBLK_NR);
|
|
|
|
return ret;
|
|
}
|
|
|