[linux-block.git] / arch / sh / kernel / cpu / sh4a / clock-sh7723.c

/*
 * 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 <asm/clock.h>
#include <asm/hwblk.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 DLLFRQ		0xa4150050

/* 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 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 clk_ops dll_clk_ops = {
	.recalc		= dll_recalc,
};

static struct clk dll_clk = {
	.name           = "dll_clk",
	.id             = -1,
	.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 = {
	.name		= "pll_clk",
	.id		= -1,
	.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_table = {
	.divisors = divisors,
	.nr_divisors = ARRAY_SIZE(divisors),
	.multipliers = multipliers,
	.nr_multipliers = ARRAY_SIZE(multipliers),
};

enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
       DIV4_SIUA, DIV4_SIUB, DIV4_IRDA, 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", FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT),
	[DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT),
	[DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT),
	[DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT),
	[DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT),
	[DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x0dbf, 0),
	[DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x0dbf, 0),
	[DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x0dbf, 0),
	[DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x0dbf, 0),
};

struct clk div6_clks[] = {
	SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0),
};

#define R_CLK (&r_clk)
#define P_CLK (&div4_clks[DIV4_P])
#define B_CLK (&div4_clks[DIV4_B])
#define U_CLK (&div4_clks[DIV4_U])
#define I_CLK (&div4_clks[DIV4_I])
#define SH_CLK (&div4_clks[DIV4_SH])

static struct clk mstp_clks[] = {
	/* See page 60 of Datasheet V1.0: Overview -> Block Diagram */
	SH_HWBLK_CLK("tlb0", -1, I_CLK, HWBLK_TLB, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("ic0", -1, I_CLK, HWBLK_IC, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("oc0", -1, I_CLK, HWBLK_OC, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("l2c0", -1, SH_CLK, HWBLK_L2C, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("ilmem0", -1, I_CLK, HWBLK_ILMEM, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("fpu0", -1, I_CLK, HWBLK_FPU, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("intc0", -1, I_CLK, HWBLK_INTC, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("dmac0", -1, B_CLK, HWBLK_DMAC0, 0),
	SH_HWBLK_CLK("sh0", -1, SH_CLK, HWBLK_SHYWAY, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("hudi0", -1, P_CLK, HWBLK_HUDI, 0),
	SH_HWBLK_CLK("ubc0", -1, I_CLK, HWBLK_UBC, 0),
	SH_HWBLK_CLK("tmu0", -1, P_CLK, HWBLK_TMU0, 0),
	SH_HWBLK_CLK("cmt0", -1, R_CLK, HWBLK_CMT, 0),
	SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0),
	SH_HWBLK_CLK("dmac1", -1, B_CLK, HWBLK_DMAC1, 0),
	SH_HWBLK_CLK("tmu1", -1, P_CLK, HWBLK_TMU1, 0),
	SH_HWBLK_CLK("flctl0", -1, P_CLK, HWBLK_FLCTL, 0),
	SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0),
	SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0),
	SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0),
	SH_HWBLK_CLK("scif3", -1, B_CLK, HWBLK_SCIF3, 0),
	SH_HWBLK_CLK("scif4", -1, B_CLK, HWBLK_SCIF4, 0),
	SH_HWBLK_CLK("scif5", -1, B_CLK, HWBLK_SCIF5, 0),
	SH_HWBLK_CLK("msiof0", -1, B_CLK, HWBLK_MSIOF0, 0),
	SH_HWBLK_CLK("msiof1", -1, B_CLK, HWBLK_MSIOF1, 0),
	SH_HWBLK_CLK("meram0", -1, SH_CLK, HWBLK_MERAM, 0),

	SH_HWBLK_CLK("i2c0", -1, P_CLK, HWBLK_IIC, 0),
	SH_HWBLK_CLK("rtc0", -1, R_CLK, HWBLK_RTC, 0),

	SH_HWBLK_CLK("atapi0", -1, SH_CLK, HWBLK_ATAPI, 0),
	SH_HWBLK_CLK("adc0", -1, P_CLK, HWBLK_ADC, 0),
	SH_HWBLK_CLK("tpu0", -1, B_CLK, HWBLK_TPU, 0),
	SH_HWBLK_CLK("irda0", -1, P_CLK, HWBLK_IRDA, 0),
	SH_HWBLK_CLK("tsif0", -1, B_CLK, HWBLK_TSIF, 0),
	SH_HWBLK_CLK("icb0", -1, B_CLK, HWBLK_ICB, CLK_ENABLE_ON_INIT),
	SH_HWBLK_CLK("sdhi0", -1, B_CLK, HWBLK_SDHI0, 0),
	SH_HWBLK_CLK("sdhi1", -1, B_CLK, HWBLK_SDHI1, 0),
	SH_HWBLK_CLK("keysc0", -1, R_CLK, HWBLK_KEYSC, 0),
	SH_HWBLK_CLK("usb0", -1, B_CLK, HWBLK_USB, 0),
	SH_HWBLK_CLK("2dg0", -1, B_CLK, HWBLK_2DG, 0),
	SH_HWBLK_CLK("siu0", -1, B_CLK, HWBLK_SIU, 0),
	SH_HWBLK_CLK("veu1", -1, B_CLK, HWBLK_VEU2H1, 0),
	SH_HWBLK_CLK("vou0", -1, B_CLK, HWBLK_VOU, 0),
	SH_HWBLK_CLK("beu0", -1, B_CLK, HWBLK_BEU, 0),
	SH_HWBLK_CLK("ceu0", -1, B_CLK, HWBLK_CEU, 0),
	SH_HWBLK_CLK("veu0", -1, B_CLK, HWBLK_VEU2H0, 0),
	SH_HWBLK_CLK("vpu0", -1, B_CLK, HWBLK_VPU, 0),
	SH_HWBLK_CLK("lcdc0", -1, B_CLK, HWBLK_LCDC, 0),
};

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]);

	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_hwblk_clk_register(mstp_clks, ARRAY_SIZE(mstp_clks));

	return ret;
}
Commit	Line	Data
c521dc02 MD	1	/*
	2	* arch/sh/kernel/cpu/sh4a/clock-sh7723.c
	3	*
	4	* SH7723 clock framework support
	5	*
	6	* Copyright (C) 2009 Magnus Damm
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21	#include <linux/init.h>
	22	#include <linux/kernel.h>
	23	#include <linux/io.h>
	24	#include <asm/clock.h>
2094e504 MD	25	#include <asm/hwblk.h>
2094e504 MD	26	#include <cpu/sh7723.h>
c521dc02 MD	27
	28	/* SH7723 registers */
	29	#define FRQCR 0xa4150000
	30	#define VCLKCR 0xa4150004
	31	#define SCLKACR 0xa4150008
	32	#define SCLKBCR 0xa415000c
	33	#define IRDACLKCR 0xa4150018
	34	#define PLLCR 0xa4150024
c521dc02 MD	35	#define DLLFRQ 0xa4150050
	36
	37	/* Fixed 32 KHz root clock for RTC and Power Management purposes */
	38	static struct clk r_clk = {
	39	.name = "rclk",
	40	.id = -1,
	41	.rate = 32768,
	42	};
	43
	44	/*
	45	* Default rate for the root input clock, reset this with clk_set_rate()
	46	* from the platform code.
	47	*/
	48	struct clk extal_clk = {
	49	.name = "extal",
	50	.id = -1,
	51	.rate = 33333333,
	52	};
	53
	54	/* The dll multiplies the 32khz r_clk, may be used instead of extal */
	55	static unsigned long dll_recalc(struct clk *clk)
	56	{
	57	unsigned long mult;
	58
	59	if (__raw_readl(PLLCR) & 0x1000)
	60	mult = __raw_readl(DLLFRQ);
	61	else
	62	mult = 0;
	63
	64	return clk->parent->rate * mult;
	65	}
	66
	67	static struct clk_ops dll_clk_ops = {
	68	.recalc = dll_recalc,
	69	};
	70
	71	static struct clk dll_clk = {
	72	.name = "dll_clk",
	73	.id = -1,
	74	.ops = &dll_clk_ops,
	75	.parent = &r_clk,
	76	.flags = CLK_ENABLE_ON_INIT,
	77	};
	78
	79	static unsigned long pll_recalc(struct clk *clk)
	80	{
	81	unsigned long mult = 1;
	82	unsigned long div = 1;
	83
	84	if (__raw_readl(PLLCR) & 0x4000)
	85	mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
	86	else
	87	div = 2;
	88
	89	return (clk->parent->rate * mult) / div;
	90	}
	91
	92	static struct clk_ops pll_clk_ops = {
	93	.recalc = pll_recalc,
	94	};
	95
	96	static struct clk pll_clk = {
	97	.name = "pll_clk",
	98	.id = -1,
99	.ops = &pll_clk_ops,
100	.flags = CLK_ENABLE_ON_INIT,
101	};
102
103	struct clk *main_clks[] = {
104	&r_clk,
105	&extal_clk,
106	&dll_clk,
107	&pll_clk,
108	};
109
110	static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
111	static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
112
113	static struct clk_div_mult_table div4_table = {
114	.divisors = divisors,
115	.nr_divisors = ARRAY_SIZE(divisors),
116	.multipliers = multipliers,
117	.nr_multipliers = ARRAY_SIZE(multipliers),
118	};
119
120	enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
121	DIV4_SIUA, DIV4_SIUB, DIV4_IRDA, DIV4_NR };
122
123	#define DIV4(_str, _reg, _bit, _mask, _flags) \
124	SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
125
126	struct clk div4_clks[DIV4_NR] = {
127	[DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT),
128	[DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT),
129	[DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT),
130	[DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT),
131	[DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT),
132	[DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x0dbf, 0),
133	[DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x0dbf, 0),
134	[DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x0dbf, 0),
135	[DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x0dbf, 0),
136	};
137
138	struct clk div6_clks[] = {
139	SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0),
140	};
141
2094e504 MD	142	#define R_CLK (&r_clk)
	143	#define P_CLK (&div4_clks[DIV4_P])
	144	#define B_CLK (&div4_clks[DIV4_B])
	145	#define U_CLK (&div4_clks[DIV4_U])
	146	#define I_CLK (&div4_clks[DIV4_I])
	147	#define SH_CLK (&div4_clks[DIV4_SH])
c521dc02 MD	148
	149	static struct clk mstp_clks[] = {
	150	/* See page 60 of Datasheet V1.0: Overview -> Block Diagram */
2094e504 MD	151	SH_HWBLK_CLK("tlb0", -1, I_CLK, HWBLK_TLB, CLK_ENABLE_ON_INIT),
	152	SH_HWBLK_CLK("ic0", -1, I_CLK, HWBLK_IC, CLK_ENABLE_ON_INIT),
	153	SH_HWBLK_CLK("oc0", -1, I_CLK, HWBLK_OC, CLK_ENABLE_ON_INIT),
	154	SH_HWBLK_CLK("l2c0", -1, SH_CLK, HWBLK_L2C, CLK_ENABLE_ON_INIT),
	155	SH_HWBLK_CLK("ilmem0", -1, I_CLK, HWBLK_ILMEM, CLK_ENABLE_ON_INIT),
	156	SH_HWBLK_CLK("fpu0", -1, I_CLK, HWBLK_FPU, CLK_ENABLE_ON_INIT),
	157	SH_HWBLK_CLK("intc0", -1, I_CLK, HWBLK_INTC, CLK_ENABLE_ON_INIT),
	158	SH_HWBLK_CLK("dmac0", -1, B_CLK, HWBLK_DMAC0, 0),
	159	SH_HWBLK_CLK("sh0", -1, SH_CLK, HWBLK_SHYWAY, CLK_ENABLE_ON_INIT),
	160	SH_HWBLK_CLK("hudi0", -1, P_CLK, HWBLK_HUDI, 0),
	161	SH_HWBLK_CLK("ubc0", -1, I_CLK, HWBLK_UBC, 0),
	162	SH_HWBLK_CLK("tmu0", -1, P_CLK, HWBLK_TMU0, 0),
	163	SH_HWBLK_CLK("cmt0", -1, R_CLK, HWBLK_CMT, 0),
	164	SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0),
	165	SH_HWBLK_CLK("dmac1", -1, B_CLK, HWBLK_DMAC1, 0),
	166	SH_HWBLK_CLK("tmu1", -1, P_CLK, HWBLK_TMU1, 0),
	167	SH_HWBLK_CLK("flctl0", -1, P_CLK, HWBLK_FLCTL, 0),
	168	SH_HWBLK_CLK("scif0", -1, P_CLK, HWBLK_SCIF0, 0),
	169	SH_HWBLK_CLK("scif1", -1, P_CLK, HWBLK_SCIF1, 0),
	170	SH_HWBLK_CLK("scif2", -1, P_CLK, HWBLK_SCIF2, 0),
	171	SH_HWBLK_CLK("scif3", -1, B_CLK, HWBLK_SCIF3, 0),
	172	SH_HWBLK_CLK("scif4", -1, B_CLK, HWBLK_SCIF4, 0),
	173	SH_HWBLK_CLK("scif5", -1, B_CLK, HWBLK_SCIF5, 0),
	174	SH_HWBLK_CLK("msiof0", -1, B_CLK, HWBLK_MSIOF0, 0),
	175	SH_HWBLK_CLK("msiof1", -1, B_CLK, HWBLK_MSIOF1, 0),
	176	SH_HWBLK_CLK("meram0", -1, SH_CLK, HWBLK_MERAM, 0),
	177
	178	SH_HWBLK_CLK("i2c0", -1, P_CLK, HWBLK_IIC, 0),
	179	SH_HWBLK_CLK("rtc0", -1, R_CLK, HWBLK_RTC, 0),
	180
	181	SH_HWBLK_CLK("atapi0", -1, SH_CLK, HWBLK_ATAPI, 0),
	182	SH_HWBLK_CLK("adc0", -1, P_CLK, HWBLK_ADC, 0),
	183	SH_HWBLK_CLK("tpu0", -1, B_CLK, HWBLK_TPU, 0),
	184	SH_HWBLK_CLK("irda0", -1, P_CLK, HWBLK_IRDA, 0),
	185	SH_HWBLK_CLK("tsif0", -1, B_CLK, HWBLK_TSIF, 0),
	186	SH_HWBLK_CLK("icb0", -1, B_CLK, HWBLK_ICB, CLK_ENABLE_ON_INIT),
	187	SH_HWBLK_CLK("sdhi0", -1, B_CLK, HWBLK_SDHI0, 0),
	188	SH_HWBLK_CLK("sdhi1", -1, B_CLK, HWBLK_SDHI1, 0),
	189	SH_HWBLK_CLK("keysc0", -1, R_CLK, HWBLK_KEYSC, 0),
	190	SH_HWBLK_CLK("usb0", -1, B_CLK, HWBLK_USB, 0),
	191	SH_HWBLK_CLK("2dg0", -1, B_CLK, HWBLK_2DG, 0),
	192	SH_HWBLK_CLK("siu0", -1, B_CLK, HWBLK_SIU, 0),
cc58f597	193	SH_HWBLK_CLK("veu1", -1, B_CLK, HWBLK_VEU2H1, 0),
2094e504 MD	194	SH_HWBLK_CLK("vou0", -1, B_CLK, HWBLK_VOU, 0),
	195	SH_HWBLK_CLK("beu0", -1, B_CLK, HWBLK_BEU, 0),
	196	SH_HWBLK_CLK("ceu0", -1, B_CLK, HWBLK_CEU, 0),
cc58f597 MD	197	SH_HWBLK_CLK("veu0", -1, B_CLK, HWBLK_VEU2H0, 0),
cc58f597 MD	198	SH_HWBLK_CLK("vpu0", -1, B_CLK, HWBLK_VPU, 0),
2094e504	199	SH_HWBLK_CLK("lcdc0", -1, B_CLK, HWBLK_LCDC, 0),
c521dc02 MD	200	};
	201
	202	int __init arch_clk_init(void)
	203	{
	204	int k, ret = 0;
	205
	206	/* autodetect extal or dll configuration */
	207	if (__raw_readl(PLLCR) & 0x1000)
	208	pll_clk.parent = &dll_clk;
	209	else
	210	pll_clk.parent = &extal_clk;
	211
	212	for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
	213	ret = clk_register(main_clks[k]);
	214
	215	if (!ret)
	216	ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
	217
	218	if (!ret)
	219	ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks));
	220
	221	if (!ret)
2094e504	222	ret = sh_hwblk_clk_register(mstp_clks, ARRAY_SIZE(mstp_clks));
c521dc02 MD	223
	224	return ret;
	225	}