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linux/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
Magnus Damm b621370a35 sh: sh7724 clock framework rewrite V3 
This patch contains V3 of the sh7724 clock framework
rewrite. The new code makes use of the recently merged
div4, div6 and mstp32 helper code. Both extal and fll are
supported as input clocks to the pll. The div6 clocks are
fed through a divide-by-3 block.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-06-11 09:14:28 +03:00

243 lines
7.5 KiB
C
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/*
* arch/sh/kernel/cpu/sh4a/clock-sh7724.c
*
* SH7724 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 <asm/clock.h>
/* SH7724 registers */
#define FRQCRA 0xa4150000
#define FRQCRB 0xa4150004
#define VCLKCR 0xa4150048
#define FCLKACR 0xa4150008
#define FCLKBCR 0xa415000c
#define IRDACLKCR 0xa4150018
#define PLLCR 0xa4150024
#define MSTPCR0 0xa4150030
#define MSTPCR1 0xa4150034
#define MSTPCR2 0xa4150038
#define SPUCLKCR 0xa415003c
#define FLLFRQ 0xa4150050
#define LSTATS 0xa4150060
/* Fixed 32 KHz root clock for RTC and Power Management purposes */
static struct clk r_clk = {
.name = "rclk",
.id = -1,
.rate = 32768,
};
/*
* Default rate for the root input clock, reset this with clk_set_rate()
* from the platform code.
*/
struct clk extal_clk = {
.name = "extal",
.id = -1,
.rate = 33333333,
};
/* The fll multiplies the 32khz r_clk, may be used instead of extal */
static unsigned long fll_recalc(struct clk *clk)
{
unsigned long mult = 0;
unsigned long div = 1;
if (__raw_readl(PLLCR) & 0x1000)
mult = __raw_readl(FLLFRQ) & 0x3ff;
if (__raw_readl(FLLFRQ) & 0x4000)
div = 2;
return (clk->parent->rate * mult) / div;
}
static struct clk_ops fll_clk_ops = {
.recalc = fll_recalc,
};
static struct clk fll_clk = {
.name = "fll_clk",
.id = -1,
.ops = &fll_clk_ops,
.parent = &r_clk,
.flags = CLK_ENABLE_ON_INIT,
};
static unsigned long pll_recalc(struct clk *clk)
{
unsigned long mult = 1;
if (__raw_readl(PLLCR) & 0x4000)
mult = (((__raw_readl(FRQCRA) >> 24) & 0x3f) + 1) * 2;
return clk->parent->rate * mult;
}
static struct clk_ops pll_clk_ops = {
.recalc = pll_recalc,
};
static struct clk pll_clk = {
.name = "pll_clk",
.id = -1,
.ops = &pll_clk_ops,
.flags = CLK_ENABLE_ON_INIT,
};
/* A fixed divide-by-3 block use by the div6 clocks */
static unsigned long div3_recalc(struct clk *clk)
{
return clk->parent->rate / 3;
}
static struct clk_ops div3_clk_ops = {
.recalc = div3_recalc,
};
static struct clk div3_clk = {
.name = "div3_clk",
.id = -1,
.ops = &div3_clk_ops,
.parent = &pll_clk,
};
struct clk *main_clks[] = {
&r_clk,
&extal_clk,
&fll_clk,
&pll_clk,
&div3_clk,
};
static int divisors[] = { 2, 0, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 };
static struct clk_div_mult_table div4_table = {
.divisors = divisors,
.nr_divisors = ARRAY_SIZE(divisors),
};
enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_P, DIV4_M1, DIV4_NR };
#define DIV4(_str, _reg, _bit, _mask, _flags) \
SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
struct clk div4_clks[DIV4_NR] = {
[DIV4_I] = DIV4("cpu_clk", FRQCRA, 20, 0x2f7d, CLK_ENABLE_ON_INIT),
[DIV4_SH] = DIV4("shyway_clk", FRQCRA, 12, 0x2f7c, CLK_ENABLE_ON_INIT),
[DIV4_B] = DIV4("bus_clk", FRQCRA, 8, 0x2f7c, CLK_ENABLE_ON_INIT),
[DIV4_P] = DIV4("peripheral_clk", FRQCRA, 0, 0x2f7c, 0),
[DIV4_M1] = DIV4("vpu_clk", FRQCRB, 4, 0x2f7c, 0),
};
struct clk div6_clks[] = {
SH_CLK_DIV6("video_clk", &div3_clk, VCLKCR, 0),
SH_CLK_DIV6("fsia_clk", &div3_clk, FCLKACR, 0),
SH_CLK_DIV6("fsib_clk", &div3_clk, FCLKBCR, 0),
SH_CLK_DIV6("irda_clk", &div3_clk, IRDACLKCR, 0),
SH_CLK_DIV6("spu_clk", &div3_clk, SPUCLKCR, 0),
};
#define MSTP(_str, _parent, _reg, _bit, _force_on, _need_cpg, _need_ram) \
SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _force_on * CLK_ENABLE_ON_INIT)
static struct clk mstp_clks[] = {
MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, 1, 1, 0),
MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, 1, 1, 0),
MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, 1, 1, 0),
MSTP("rs0", &div4_clks[DIV4_B], MSTPCR0, 28, 1, 1, 0),
MSTP("ilmem0", &div4_clks[DIV4_I], MSTPCR0, 27, 1, 1, 0),
MSTP("l2c0", &div4_clks[DIV4_SH], MSTPCR0, 26, 1, 1, 0),
MSTP("fpu0", &div4_clks[DIV4_I], MSTPCR0, 24, 1, 1, 0),
MSTP("intc0", &div4_clks[DIV4_P], MSTPCR0, 22, 1, 1, 0),
MSTP("dmac0", &div4_clks[DIV4_B], MSTPCR0, 21, 0, 1, 1),
MSTP("sh0", &div4_clks[DIV4_SH], MSTPCR0, 20, 0, 1, 0),
MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0, 1, 0),
MSTP("ubc0", &div4_clks[DIV4_I], MSTPCR0, 17, 0, 1, 0),
MSTP("tmu0", &div4_clks[DIV4_P], MSTPCR0, 15, 0, 1, 0),
MSTP("cmt0", &r_clk, MSTPCR0, 14, 0, 0, 0),
MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0, 0, 0),
MSTP("dmac1", &div4_clks[DIV4_B], MSTPCR0, 12, 0, 1, 1),
MSTP("tmu1", &div4_clks[DIV4_P], MSTPCR0, 10, 0, 1, 0),
MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 9, 0, 1, 0),
MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 8, 0, 1, 0),
MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 7, 0, 1, 0),
MSTP("scif3", &div4_clks[DIV4_B], MSTPCR0, 6, 0, 1, 0),
MSTP("scif4", &div4_clks[DIV4_B], MSTPCR0, 5, 0, 1, 0),
MSTP("scif5", &div4_clks[DIV4_B], MSTPCR0, 4, 0, 1, 0),
MSTP("msiof0", &div4_clks[DIV4_B], MSTPCR0, 2, 0, 1, 0),
MSTP("msiof1", &div4_clks[DIV4_B], MSTPCR0, 1, 0, 1, 0),
MSTP("keysc0", &r_clk, MSTPCR1, 12, 0, 0, 0),
MSTP("rtc0", &r_clk, MSTPCR1, 11, 0, 0, 0),
MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0, 1, 0),
MSTP("i2c1", &div4_clks[DIV4_P], MSTPCR1, 8, 0, 1, 0),
MSTP("mmc0", &div4_clks[DIV4_B], MSTPCR2, 29, 0, 1, 0),
MSTP("eth0", &div4_clks[DIV4_B], MSTPCR2, 28, 0, 1, 0),
MSTP("atapi0", &div4_clks[DIV4_B], MSTPCR2, 26, 0, 1, 0),
MSTP("tpu0", &div4_clks[DIV4_B], MSTPCR2, 25, 0, 1, 0),
MSTP("irda0", &div4_clks[DIV4_P], MSTPCR2, 24, 0, 1, 0),
MSTP("tsif0", &div4_clks[DIV4_B], MSTPCR2, 22, 0, 1, 0),
MSTP("usb1", &div4_clks[DIV4_B], MSTPCR2, 21, 0, 1, 1),
MSTP("usb0", &div4_clks[DIV4_B], MSTPCR2, 20, 0, 1, 1),
MSTP("2dg0", &div4_clks[DIV4_B], MSTPCR2, 19, 0, 1, 1),
MSTP("sdhi0", &div4_clks[DIV4_B], MSTPCR2, 18, 0, 1, 0),
MSTP("sdhi1", &div4_clks[DIV4_B], MSTPCR2, 17, 0, 1, 0),
MSTP("veu1", &div4_clks[DIV4_B], MSTPCR2, 15, 1, 1, 1),
MSTP("ceu1", &div4_clks[DIV4_B], MSTPCR2, 13, 0, 1, 1),
MSTP("beu1", &div4_clks[DIV4_B], MSTPCR2, 12, 0, 1, 1),
MSTP("2ddmac0", &div4_clks[DIV4_SH], MSTPCR2, 10, 0, 1, 1),
MSTP("spu0", &div4_clks[DIV4_B], MSTPCR2, 9, 0, 1, 0),
MSTP("jpu0", &div4_clks[DIV4_B], MSTPCR2, 6, 1, 1, 1),
MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0, 1, 1),
MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0, 1, 1),
MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0, 1, 1),
MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, 1, 1, 1),
MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, 1, 1, 1),
MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0, 1, 1),
};
int __init arch_clk_init(void)
{
int k, ret = 0;
/* autodetect extal or fll configuration */
if (__raw_readl(PLLCR) & 0x1000)
pll_clk.parent = &fll_clk;
else
pll_clk.parent = &extal_clk;
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
if (!ret)
ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks));
if (!ret)
ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks));
return ret;
}
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