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/*
* r8a7778 clock framework support
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Copyright (C) 2013 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* based on r8a7779
*
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 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
*/
/*
* MD MD MD MD PLLA PLLB EXTAL clki clkz
* 19 18 12 11 (HMz) (MHz) (MHz)
*----------------------------------------------------------------------------
* 1 0 0 0 x21 x21 38.00 800 800
* 1 0 0 1 x24 x24 33.33 800 800
* 1 0 1 0 x28 x28 28.50 800 800
* 1 0 1 1 x32 x32 25.00 800 800
* 1 1 0 1 x24 x21 33.33 800 700
* 1 1 1 0 x28 x21 28.50 800 600
* 1 1 1 1 x32 x24 25.00 800 600
*/
#include <linux/io.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
#include <mach/clock.h>
#include <mach/common.h>
#define MSTPCR0 IOMEM(0xffc80030)
#define MSTPCR1 IOMEM(0xffc80034)
#define MSTPCR3 IOMEM(0xffc8003c)
#define MSTPSR1 IOMEM(0xffc80044)
#define MSTPSR4 IOMEM(0xffc80048)
#define MSTPSR6 IOMEM(0xffc8004c)
#define MSTPCR4 IOMEM(0xffc80050)
#define MSTPCR5 IOMEM(0xffc80054)
#define MSTPCR6 IOMEM(0xffc80058)
#define MODEMR 0xFFCC0020
#define MD(nr) BIT(nr)
/* ioremap() through clock mapping mandatory to avoid
* collision with ARM coherent DMA virtual memory range.
*/
static struct clk_mapping cpg_mapping = {
.phys = 0xffc80000,
.len = 0x80,
};
static struct clk extal_clk = {
/* .rate will be updated on r8a7778_clock_init() */
.mapping = &cpg_mapping,
};
/*
* clock ratio of these clock will be updated
* on r8a7778_clock_init()
*/
SH_FIXED_RATIO_CLK_SET(plla_clk, extal_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(pllb_clk, extal_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(i_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(s_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(s1_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(s3_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(s4_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(b_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(out_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(p_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(g_clk, plla_clk, 1, 1);
SH_FIXED_RATIO_CLK_SET(z_clk, pllb_clk, 1, 1);
static struct clk *main_clks[] = {
&extal_clk,
&plla_clk,
&pllb_clk,
&i_clk,
&s_clk,
&s1_clk,
&s3_clk,
&s4_clk,
&b_clk,
&out_clk,
&p_clk,
&g_clk,
&z_clk,
};
enum {
MSTP114,
MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
MSTP016, MSTP015,
MSTP_NR };
static struct clk mstp_clks[MSTP_NR] = {
[MSTP114] = SH_CLK_MSTP32(&p_clk, MSTPCR1, 14, 0), /* Ether */
[MSTP026] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 26, 0), /* SCIF0 */
[MSTP025] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 25, 0), /* SCIF1 */
[MSTP024] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 24, 0), /* SCIF2 */
[MSTP023] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 23, 0), /* SCIF3 */
[MSTP022] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 22, 0), /* SCIF4 */
[MSTP021] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 21, 0), /* SCIF5 */
[MSTP016] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 16, 0), /* TMU0 */
[MSTP015] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 15, 0), /* TMU1 */
};
static struct clk_lookup lookups[] = {
/* MSTP32 clocks */
CLKDEV_DEV_ID("sh-eth", &mstp_clks[MSTP114]), /* Ether */
CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP023]), /* SCIF3 */
CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP022]), /* SCIF4 */
CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP021]), /* SCIF6 */
CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP016]), /* TMU00 */
CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP015]), /* TMU01 */
};
void __init r8a7778_clock_init(void)
{
void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
u32 mode;
int k, ret = 0;
BUG_ON(!modemr);
mode = ioread32(modemr);
iounmap(modemr);
switch (mode & (MD(19) | MD(18) | MD(12) | MD(11))) {
case MD(19):
extal_clk.rate = 38000000;
SH_CLK_SET_RATIO(&plla_clk_ratio, 21, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
break;
case MD(19) | MD(11):
extal_clk.rate = 33333333;
SH_CLK_SET_RATIO(&plla_clk_ratio, 24, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 24, 1);
break;
case MD(19) | MD(12):
extal_clk.rate = 28500000;
SH_CLK_SET_RATIO(&plla_clk_ratio, 28, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 28, 1);
break;
case MD(19) | MD(12) | MD(11):
extal_clk.rate = 25000000;
SH_CLK_SET_RATIO(&plla_clk_ratio, 32, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 32, 1);
break;
case MD(19) | MD(18) | MD(11):
extal_clk.rate = 33333333;
SH_CLK_SET_RATIO(&plla_clk_ratio, 24, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
break;
case MD(19) | MD(18) | MD(12):
extal_clk.rate = 28500000;
SH_CLK_SET_RATIO(&plla_clk_ratio, 28, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 21, 1);
break;
case MD(19) | MD(18) | MD(12) | MD(11):
extal_clk.rate = 25000000;
SH_CLK_SET_RATIO(&plla_clk_ratio, 32, 1);
SH_CLK_SET_RATIO(&pllb_clk_ratio, 24, 1);
break;
default:
BUG();
}
if (mode & MD(1)) {
SH_CLK_SET_RATIO(&i_clk_ratio, 1, 1);
SH_CLK_SET_RATIO(&s_clk_ratio, 1, 3);
SH_CLK_SET_RATIO(&s1_clk_ratio, 1, 6);
SH_CLK_SET_RATIO(&s3_clk_ratio, 1, 4);
SH_CLK_SET_RATIO(&s4_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&p_clk_ratio, 1, 12);
SH_CLK_SET_RATIO(&g_clk_ratio, 1, 12);
if (mode & MD(2)) {
SH_CLK_SET_RATIO(&b_clk_ratio, 1, 18);
SH_CLK_SET_RATIO(&out_clk_ratio, 1, 18);
} else {
SH_CLK_SET_RATIO(&b_clk_ratio, 1, 12);
SH_CLK_SET_RATIO(&out_clk_ratio, 1, 12);
}
} else {
SH_CLK_SET_RATIO(&i_clk_ratio, 1, 1);
SH_CLK_SET_RATIO(&s_clk_ratio, 1, 4);
SH_CLK_SET_RATIO(&s1_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&s3_clk_ratio, 1, 4);
SH_CLK_SET_RATIO(&s4_clk_ratio, 1, 8);
SH_CLK_SET_RATIO(&p_clk_ratio, 1, 16);
SH_CLK_SET_RATIO(&g_clk_ratio, 1, 12);
if (mode & MD(2)) {
SH_CLK_SET_RATIO(&b_clk_ratio, 1, 16);
SH_CLK_SET_RATIO(&out_clk_ratio, 1, 16);
} else {
SH_CLK_SET_RATIO(&b_clk_ratio, 1, 12);
SH_CLK_SET_RATIO(&out_clk_ratio, 1, 12);
}
}
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
if (!ret)
shmobile_clk_init();
else
panic("failed to setup r8a7778 clocks\n");
}
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