/*
* arch/sh/kernel/cpu/sh4a/clock-sh7722.c
*
* SH7722 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/clkdev.h>
#include <asm/clock.h>
#include <asm/hwblk.h>
#include <cpu/sh7722.h>
/* SH7722 registers */
#define FRQCR 0xa4150000
#define VCLKCR 0xa4150004
#define SCLKACR 0xa4150008
#define SCLKBCR 0xa415000c
#define IRDACLKCR 0xa4150018
#define PLLCR 0xa4150024
#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 block 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 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 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,
};
#define DIV4(_reg, _bit, _mask, _flags) \
SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_NR };
struct clk div4_clks[DIV4_NR] = {
[DIV4_I] = DIV4(FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT),
[DIV4_U] = DIV4(FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT),
[DIV4_SH] = DIV4(FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT),
[DIV4_B] = DIV4(FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT),
[DIV4_B3] = DIV4(FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT),
[DIV4_P] = DIV4(FRQCR, 0, 0x1fff, 0),
};
enum { DIV4_IRDA, DIV4_ENABLE_NR };
struct clk div4_enable_clks[DIV4_ENABLE_NR] = {
[DIV4_IRDA] = DIV4(IRDACLKCR, 0, 0x1fff, 0),
};
enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR };
struct clk div4_reparent_clks[DIV4_REPARENT_NR] = {
[DIV4_SIUA] = DIV4(SCLKACR, 0, 0x1fff, 0),
[DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x1fff, 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[HWBLK_NR] = {
SH_HWBLK_CLK(HWBLK_URAM, &div4_clks[DIV4_U], CLK_ENABLE_ON_INIT),
SH_HWBLK_CLK(HWBLK_XYMEM, &div4_clks[DIV4_B], CLK_ENABLE_ON_INIT),
SH_HWBLK_CLK(HWBLK_TMU, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_CMT, &r_clk, 0),
SH_HWBLK_CLK(HWBLK_RWDT, &r_clk, 0),
SH_HWBLK_CLK(HWBLK_FLCTL, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_SCIF0, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_SCIF1, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_SCIF2, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_IIC, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_RTC, &r_clk, 0),
SH_HWBLK_CLK(HWBLK_SDHI, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_KEYSC, &r_clk, 0),
SH_HWBLK_CLK(HWBLK_USBF, &div4_clks[DIV4_P], 0),
SH_HWBLK_CLK(HWBLK_2DG, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_SIU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_VOU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_JPU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_BEU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_CEU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_VEU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_VPU, &div4_clks[DIV4_B], 0),
SH_HWBLK_CLK(HWBLK_LCDC, &div4_clks[DIV4_P], 0),
};
#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
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("uram0", &mstp_clks[HWBLK_URAM]),
CLKDEV_CON_ID("xymem0", &mstp_clks[HWBLK_XYMEM]),
{
/* TMU0 */
.dev_id = "sh_tmu.0",
.con_id = "tmu_fck",
.clk = &mstp_clks[HWBLK_TMU],
}, {
/* TMU1 */
.dev_id = "sh_tmu.1",
.con_id = "tmu_fck",
.clk = &mstp_clks[HWBLK_TMU],
}, {
/* TMU2 */
.dev_id = "sh_tmu.2",
.con_id = "tmu_fck",
.clk = &mstp_clks[HWBLK_TMU],
},
CLKDEV_CON_ID("cmt_fck", &mstp_clks[HWBLK_CMT]),
CLKDEV_CON_ID("rwdt0", &mstp_clks[HWBLK_RWDT]),
CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]),
{
/* SCIF0 */
.dev_id = "sh-sci.0",
.con_id = "sci_fck",
.clk = &mstp_clks[HWBLK_SCIF0],
}, {
/* SCIF1 */
.dev_id = "sh-sci.1",
.con_id = "sci_fck",
.clk = &mstp_clks[HWBLK_SCIF1],
}, {
/* SCIF2 */
.dev_id = "sh-sci.2",
.con_id = "sci_fck",
.clk = &mstp_clks[HWBLK_SCIF2],
},
CLKDEV_CON_ID("i2c0", &mstp_clks[HWBLK_IIC]),
CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]),
CLKDEV_CON_ID("sdhi0", &mstp_clks[HWBLK_SDHI]),
CLKDEV_CON_ID("keysc0", &mstp_clks[HWBLK_KEYSC]),
CLKDEV_CON_ID("usbf0", &mstp_clks[HWBLK_USBF]),
CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
CLKDEV_CON_ID("siu0", &mstp_clks[HWBLK_SIU]),
CLKDEV_CON_ID("vou0", &mstp_clks[HWBLK_VOU]),
CLKDEV_CON_ID("jpu0", &mstp_clks[HWBLK_JPU]),
CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]),
CLKDEV_CON_ID("ceu0", &mstp_clks[HWBLK_CEU]),
CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU]),
CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]),
CLKDEV_CON_ID("lcdc0", &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_hwblk_clk_register(mstp_clks, HWBLK_NR);
return ret;
}
