ARM: mach-shmobile: R-Mobile A1 support.

This adds preliminary support for the R8A7740 (R-Mobile A1) CPU

Timer, serial, gic, clock are supported at this point.
This patch is based on v0.1 manual

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 378 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/clock-r8a7740.c b/arch/arm/mach-shmobile/clock-r8a7740.c
new file mode 100644
index 000000000000..5bb02f224077
--- /dev/null
+++ b/arch/arm/mach-shmobile/clock-r8a7740.c
@@ -0,0 +1,378 @@
+/*
+ * R8A7740 processor support
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * 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/sh_clk.h>
+#include <linux/clkdev.h>
+#include <mach/common.h>
+#include <mach/r8a7740.h>
+
+/*
+ *        |  MDx  |  XTAL1/EXTAL1   |  System   | EXTALR |
+ *  Clock |-------+-----------------+  clock    | 32.768 |   RCLK
+ *  Mode  | 2/1/0 | src         MHz |  source   |  KHz   |  source
+ * -------+-------+-----------------+-----------+--------+----------
+ *    0   | 0 0 0 | External  20~50 | XTAL1     |    O   |  EXTALR
+ *    1   | 0 0 1 | Crystal   20~30 | XTAL1     |    O   |  EXTALR
+ *    2   | 0 1 0 | External  40~50 | XTAL1 / 2 |    O   |  EXTALR
+ *    3   | 0 1 1 | Crystal   40~50 | XTAL1 / 2 |    O   |  EXTALR
+ *    4   | 1 0 0 | External  20~50 | XTAL1     |    x   |  XTAL1 / 1024
+ *    5   | 1 0 1 | Crystal   20~30 | XTAL1     |    x   |  XTAL1 / 1024
+ *    6   | 1 1 0 | External  40~50 | XTAL1 / 2 |    x   |  XTAL1 / 2048
+ *    7   | 1 1 1 | Crystal   40~50 | XTAL1 / 2 |    x   |  XTAL1 / 2048
+ */
+
+/* CPG registers */
+#define FRQCRA		0xe6150000
+#define FRQCRB		0xe6150004
+#define FRQCRC		0xe61500e0
+#define PLLC01CR	0xe6150028
+
+#define SUBCKCR		0xe6150080
+
+#define MSTPSR0		0xe6150030
+#define MSTPSR1		0xe6150038
+#define MSTPSR2		0xe6150040
+#define MSTPSR3		0xe6150048
+#define MSTPSR4		0xe615004c
+#define SMSTPCR0	0xe6150130
+#define SMSTPCR1	0xe6150134
+#define SMSTPCR2	0xe6150138
+#define SMSTPCR3	0xe615013c
+#define SMSTPCR4	0xe6150140
+
+/* Fixed 32 KHz root clock from EXTALR pin */
+static struct clk extalr_clk = {
+	.rate	= 32768,
+};
+
+/*
+ * 25MHz default rate for the EXTAL1 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+static struct clk extal1_clk = {
+	.rate	= 25000000,
+};
+
+/*
+ * 48MHz default rate for the EXTAL2 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+static struct clk extal2_clk = {
+	.rate	= 48000000,
+};
+
+/*
+ * 27MHz default rate for the DV_CLKI root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+static struct clk dv_clk = {
+	.rate	= 27000000,
+};
+
+static unsigned long div_recalc(struct clk *clk)
+{
+	return clk->parent->rate / (int)(clk->priv);
+}
+
+static struct clk_ops div_clk_ops = {
+	.recalc	= div_recalc,
+};
+
+/* extal1 / 2 */
+static struct clk extal1_div2_clk = {
+	.ops	= &div_clk_ops,
+	.priv	= (void *)2,
+	.parent	= &extal1_clk,
+};
+
+/* extal1 / 1024 */
+static struct clk extal1_div1024_clk = {
+	.ops	= &div_clk_ops,
+	.priv	= (void *)1024,
+	.parent	= &extal1_clk,
+};
+
+/* extal1 / 2 / 1024 */
+static struct clk extal1_div2048_clk = {
+	.ops	= &div_clk_ops,
+	.priv	= (void *)1024,
+	.parent	= &extal1_div2_clk,
+};
+
+/* extal2 / 2 */
+static struct clk extal2_div2_clk = {
+	.ops	= &div_clk_ops,
+	.priv	= (void *)2,
+	.parent	= &extal2_clk,
+};
+
+static struct clk_ops followparent_clk_ops = {
+	.recalc	= followparent_recalc,
+};
+
+/* Main clock */
+static struct clk system_clk = {
+	.ops	= &followparent_clk_ops,
+};
+
+static struct clk system_div2_clk = {
+	.ops	= &div_clk_ops,
+	.priv	= (void *)2,
+	.parent	= &system_clk,
+};
+
+/* r_clk */
+static struct clk r_clk = {
+	.ops	= &followparent_clk_ops,
+};
+
+/* PLLC0/PLLC1 */
+static unsigned long pllc01_recalc(struct clk *clk)
+{
+	unsigned long mult = 1;
+
+	if (__raw_readl(PLLC01CR) & (1 << 14))
+		mult = ((__raw_readl(clk->enable_reg) >> 24) & 0x7f) + 1;
+
+	return clk->parent->rate * mult;
+}
+
+static struct clk_ops pllc01_clk_ops = {
+	.recalc		= pllc01_recalc,
+};
+
+static struct clk pllc0_clk = {
+	.ops		= &pllc01_clk_ops,
+	.flags		= CLK_ENABLE_ON_INIT,
+	.parent		= &system_clk,
+	.enable_reg	= (void __iomem *)FRQCRC,
+};
+
+static struct clk pllc1_clk = {
+	.ops		= &pllc01_clk_ops,
+	.flags		= CLK_ENABLE_ON_INIT,
+	.parent		= &system_div2_clk,
+	.enable_reg	= (void __iomem *)FRQCRA,
+};
+
+/* PLLC1 / 2 */
+static struct clk pllc1_div2_clk = {
+	.ops		= &div_clk_ops,
+	.priv		= (void *)2,
+	.parent		= &pllc1_clk,
+};
+
+struct clk *main_clks[] = {
+	&extalr_clk,
+	&extal1_clk,
+	&extal2_clk,
+	&extal1_div2_clk,
+	&extal1_div1024_clk,
+	&extal1_div2048_clk,
+	&extal2_div2_clk,
+	&dv_clk,
+	&system_clk,
+	&system_div2_clk,
+	&r_clk,
+	&pllc0_clk,
+	&pllc1_clk,
+	&pllc1_div2_clk,
+};
+
+static void div4_kick(struct clk *clk)
+{
+	unsigned long value;
+
+	/* set KICK bit in FRQCRB to update hardware setting */
+	value = __raw_readl(FRQCRB);
+	value |= (1 << 31);
+	__raw_writel(value, FRQCRB);
+}
+
+static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
+			  24, 32, 36, 48, 0, 72, 96, 0 };
+
+static struct clk_div_mult_table div4_div_mult_table = {
+	.divisors = divisors,
+	.nr_divisors = ARRAY_SIZE(divisors),
+};
+
+static struct clk_div4_table div4_table = {
+	.div_mult_table = &div4_div_mult_table,
+	.kick = div4_kick,
+};
+
+enum {
+	DIV4_I, DIV4_ZG, DIV4_B, DIV4_M1, DIV4_HP,
+	DIV4_HPP, DIV4_S, DIV4_ZB, DIV4_M3, DIV4_CP,
+	DIV4_NR
+};
+
+struct clk div4_clks[DIV4_NR] = {
+	[DIV4_I]	= SH_CLK_DIV4(&pllc1_clk, FRQCRA, 20, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_ZG]	= SH_CLK_DIV4(&pllc1_clk, FRQCRA, 16, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_B]	= SH_CLK_DIV4(&pllc1_clk, FRQCRA,  8, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_M1]	= SH_CLK_DIV4(&pllc1_clk, FRQCRA,  4, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_HP]	= SH_CLK_DIV4(&pllc1_clk, FRQCRB,  4, 0x6fff, 0),
+	[DIV4_HPP]	= SH_CLK_DIV4(&pllc1_clk, FRQCRC, 20, 0x6fff, 0),
+	[DIV4_S]	= SH_CLK_DIV4(&pllc1_clk, FRQCRC, 12, 0x6fff, 0),
+	[DIV4_ZB]	= SH_CLK_DIV4(&pllc1_clk, FRQCRC,  8, 0x6fff, 0),
+	[DIV4_M3]	= SH_CLK_DIV4(&pllc1_clk, FRQCRC,  4, 0x6fff, 0),
+	[DIV4_CP]	= SH_CLK_DIV4(&pllc1_clk, FRQCRC,  0, 0x6fff, 0),
+};
+
+enum {
+	DIV6_SUB,
+	DIV6_NR
+};
+
+static struct clk div6_clks[DIV6_NR] = {
+	[DIV6_SUB]	= SH_CLK_DIV6(&pllc1_div2_clk, SUBCKCR, 0),
+};
+
+enum {
+	MSTP125,
+	MSTP116, MSTP111,
+
+	MSTP230,
+	MSTP222,
+	MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
+
+	MSTP329, MSTP323,
+
+	MSTP_NR
+};
+
+static struct clk mstp_clks[MSTP_NR] = {
+	[MSTP125] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR1, 25, 0), /* TMU0 */
+	[MSTP116] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR1, 16, 0), /* IIC0 */
+	[MSTP111] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR1, 11, 0), /* TMU1 */
+
+	[MSTP230] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2, 30, 0), /* SCIFA6 */
+	[MSTP222] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2, 22, 0), /* SCIFA7 */
+	[MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  7, 0), /* SCIFA5 */
+	[MSTP206] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  6, 0), /* SCIFB */
+	[MSTP204] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  4, 0), /* SCIFA0 */
+	[MSTP203] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  3, 0), /* SCIFA1 */
+	[MSTP202] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  2, 0), /* SCIFA2 */
+	[MSTP201] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  1, 0), /* SCIFA3 */
+	[MSTP200] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR2,  0, 0), /* SCIFA4 */
+
+	[MSTP329] = SH_CLK_MSTP32(&r_clk,		SMSTPCR3, 29, 0), /* CMT10 */
+	[MSTP323] = SH_CLK_MSTP32(&div6_clks[DIV6_SUB],	SMSTPCR3, 23, 0), /* IIC1 */
+};
+
+static struct clk_lookup lookups[] = {
+	/* main clocks */
+	CLKDEV_CON_ID("extalr",			&extalr_clk),
+	CLKDEV_CON_ID("extal1",			&extal1_clk),
+	CLKDEV_CON_ID("extal2",			&extal2_clk),
+	CLKDEV_CON_ID("extal1_div2",		&extal1_div2_clk),
+	CLKDEV_CON_ID("extal1_div1024",		&extal1_div1024_clk),
+	CLKDEV_CON_ID("extal1_div2048",		&extal1_div2048_clk),
+	CLKDEV_CON_ID("extal2_div2",		&extal2_div2_clk),
+	CLKDEV_CON_ID("dv_clk",			&dv_clk),
+	CLKDEV_CON_ID("system_clk",		&system_clk),
+	CLKDEV_CON_ID("system_div2_clk",	&system_div2_clk),
+	CLKDEV_CON_ID("r_clk",			&r_clk),
+	CLKDEV_CON_ID("pllc0_clk",		&pllc0_clk),
+	CLKDEV_CON_ID("pllc1_clk",		&pllc1_clk),
+	CLKDEV_CON_ID("pllc1_div2_clk",		&pllc1_div2_clk),
+
+	/* DIV4 clocks */
+	CLKDEV_CON_ID("i_clk",			&div4_clks[DIV4_I]),
+	CLKDEV_CON_ID("zg_clk",			&div4_clks[DIV4_ZG]),
+	CLKDEV_CON_ID("b_clk",			&div4_clks[DIV4_B]),
+	CLKDEV_CON_ID("m1_clk",			&div4_clks[DIV4_M1]),
+	CLKDEV_CON_ID("hp_clk",			&div4_clks[DIV4_HP]),
+	CLKDEV_CON_ID("hpp_clk",		&div4_clks[DIV4_HPP]),
+	CLKDEV_CON_ID("s_clk",			&div4_clks[DIV4_S]),
+	CLKDEV_CON_ID("zb_clk",			&div4_clks[DIV4_ZB]),
+	CLKDEV_CON_ID("m3_clk",			&div4_clks[DIV4_M3]),
+	CLKDEV_CON_ID("cp_clk",			&div4_clks[DIV4_CP]),
+
+	/* DIV6 clocks */
+	CLKDEV_CON_ID("sub_clk",		&div6_clks[DIV6_SUB]),
+
+	/* MSTP32 clocks */
+	CLKDEV_DEV_ID("sh_tmu.1",		&mstp_clks[MSTP111]),
+	CLKDEV_DEV_ID("i2c-sh_mobile.0",	&mstp_clks[MSTP116]),
+	CLKDEV_DEV_ID("sh_tmu.0",		&mstp_clks[MSTP125]),
+
+	CLKDEV_DEV_ID("sh-sci.4",		&mstp_clks[MSTP200]),
+	CLKDEV_DEV_ID("sh-sci.3",		&mstp_clks[MSTP201]),
+	CLKDEV_DEV_ID("sh-sci.2",		&mstp_clks[MSTP202]),
+	CLKDEV_DEV_ID("sh-sci.1",		&mstp_clks[MSTP203]),
+	CLKDEV_DEV_ID("sh-sci.0",		&mstp_clks[MSTP204]),
+	CLKDEV_DEV_ID("sh-sci.8",		&mstp_clks[MSTP206]),
+	CLKDEV_DEV_ID("sh-sci.5",		&mstp_clks[MSTP207]),
+
+	CLKDEV_DEV_ID("sh-sci.7",		&mstp_clks[MSTP222]),
+	CLKDEV_DEV_ID("sh-sci.6",		&mstp_clks[MSTP230]),
+
+	CLKDEV_DEV_ID("sh_cmt.10",		&mstp_clks[MSTP329]),
+	CLKDEV_DEV_ID("i2c-sh_mobile.1",	&mstp_clks[MSTP323]),
+};
+
+void __init r8a7740_clock_init(u8 md_ck)
+{
+	int k, ret = 0;
+
+	/* detect system clock parent */
+	if (md_ck & MD_CK1)
+		system_clk.parent = &extal1_div2_clk;
+	else
+		system_clk.parent = &extal1_clk;
+
+	/* detect RCLK parent */
+	switch (md_ck & (MD_CK2 | MD_CK1)) {
+	case MD_CK2 | MD_CK1:
+		r_clk.parent = &extal1_div2048_clk;
+		break;
+	case MD_CK2:
+		r_clk.parent = &extal1_div1024_clk;
+		break;
+	case MD_CK1:
+	default:
+		r_clk.parent = &extalr_clk;
+		break;
+	}
+
+	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, DIV6_NR);
+
+	if (!ret)
+		ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
+
+	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+
+	if (!ret)
+		clk_init();
+	else
+		panic("failed to setup r8a7740 clocks\n");
+}