Initial import

1 files changed, 271 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/clock-r8a7779.c b/arch/arm/mach-shmobile/clock-r8a7779.c
new file mode 100644
index 000000000..fa8ab2cc9
--- /dev/null
+++ b/arch/arm/mach-shmobile/clock-r8a7779.c
@@ -0,0 +1,271 @@
+/*
+ * r8a7779 clock framework support
+ *
+ * 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.
+ */
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/sh_clk.h>
+#include <linux/clkdev.h>
+#include <linux/sh_timer.h>
+
+#include "clock.h"
+#include "common.h"
+#include "r8a7779.h"
+
+/*
+ *		MD1 = 1			MD1 = 0
+ *		(PLLA = 1500)		(PLLA = 1600)
+ *		(MHz)			(MHz)
+ *------------------------------------------------+--------------------
+ * clkz		1000   (2/3)		800   (1/2)
+ * clkzs	 250   (1/6)		200   (1/8)
+ * clki		 750   (1/2)		800   (1/2)
+ * clks		 250   (1/6)		200   (1/8)
+ * clks1	 125   (1/12)		100   (1/16)
+ * clks3	 187.5 (1/8)		200   (1/8)
+ * clks4	  93.7 (1/16)		100   (1/16)
+ * clkp		  62.5 (1/24)		 50   (1/32)
+ * clkg		  62.5 (1/24)		 66.6 (1/24)
+ * clkb, CLKOUT
+ * (MD2 = 0)	  62.5 (1/24)		 66.6 (1/24)
+ * (MD2 = 1)	  41.6 (1/36)		 50   (1/32)
+*/
+
+#define MD(nr)	BIT(nr)
+
+#define MSTPCR0		IOMEM(0xffc80030)
+#define MSTPCR1		IOMEM(0xffc80034)
+#define MSTPCR3		IOMEM(0xffc8003c)
+#define MSTPSR1		IOMEM(0xffc80044)
+
+/* 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,
+};
+
+/*
+ * Default rate for the root input clock, reset this with clk_set_rate()
+ * from the platform code.
+ */
+static struct clk plla_clk = {
+	/* .rate will be updated on r8a7779_clock_init() */
+	.mapping	= &cpg_mapping,
+};
+
+/*
+ * clock ratio of these clock will be updated
+ * on r8a7779_clock_init()
+ */
+SH_FIXED_RATIO_CLK_SET(clkz_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clkzs_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clki_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clks_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clks1_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clks3_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clks4_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clkb_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clkout_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clkp_clk,	plla_clk, 1, 1);
+SH_FIXED_RATIO_CLK_SET(clkg_clk,	plla_clk, 1, 1);
+
+static struct clk *main_clks[] = {
+	&plla_clk,
+	&clkz_clk,
+	&clkzs_clk,
+	&clki_clk,
+	&clks_clk,
+	&clks1_clk,
+	&clks3_clk,
+	&clks4_clk,
+	&clkb_clk,
+	&clkout_clk,
+	&clkp_clk,
+	&clkg_clk,
+};
+
+enum { MSTP323, MSTP322, MSTP321, MSTP320,
+	MSTP120,
+	MSTP116, MSTP115, MSTP114,
+	MSTP110, MSTP109, MSTP108,
+	MSTP103, MSTP101, MSTP100,
+	MSTP030,
+	MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
+	MSTP016, MSTP015, MSTP014,
+	MSTP007,
+	MSTP_NR };
+
+static struct clk mstp_clks[MSTP_NR] = {
+	[MSTP323] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 23, 0), /* SDHI0 */
+	[MSTP322] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 22, 0), /* SDHI1 */
+	[MSTP321] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 21, 0), /* SDHI2 */
+	[MSTP320] = SH_CLK_MSTP32(&clkp_clk, MSTPCR3, 20, 0), /* SDHI3 */
+	[MSTP120] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 20, MSTPSR1, 0), /* VIN3 */
+	[MSTP116] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 16, MSTPSR1, 0), /* PCIe */
+	[MSTP115] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 15, MSTPSR1, 0), /* SATA */
+	[MSTP114] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1, 14, MSTPSR1, 0), /* Ether */
+	[MSTP110] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1, 10, MSTPSR1, 0), /* VIN0 */
+	[MSTP109] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1,  9, MSTPSR1, 0), /* VIN1 */
+	[MSTP108] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1,  8, MSTPSR1, 0), /* VIN2 */
+	[MSTP103] = SH_CLK_MSTP32_STS(&clks_clk, MSTPCR1,  3, MSTPSR1, 0), /* DU */
+	[MSTP101] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1,  1, MSTPSR1, 0), /* USB2 */
+	[MSTP100] = SH_CLK_MSTP32_STS(&clkp_clk, MSTPCR1,  0, MSTPSR1, 0), /* USB0/1 */
+	[MSTP030] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 30, 0), /* I2C0 */
+	[MSTP029] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 29, 0), /* I2C1 */
+	[MSTP028] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 28, 0), /* I2C2 */
+	[MSTP027] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 27, 0), /* I2C3 */
+	[MSTP026] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 26, 0), /* SCIF0 */
+	[MSTP025] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 25, 0), /* SCIF1 */
+	[MSTP024] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 24, 0), /* SCIF2 */
+	[MSTP023] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 23, 0), /* SCIF3 */
+	[MSTP022] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 22, 0), /* SCIF4 */
+	[MSTP021] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 21, 0), /* SCIF5 */
+	[MSTP016] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 16, 0), /* TMU0 */
+	[MSTP015] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 15, 0), /* TMU1 */
+	[MSTP014] = SH_CLK_MSTP32(&clkp_clk, MSTPCR0, 14, 0), /* TMU2 */
+	[MSTP007] = SH_CLK_MSTP32(&clks_clk, MSTPCR0,  7, 0), /* HSPI */
+};
+
+static struct clk_lookup lookups[] = {
+	/* main clocks */
+	CLKDEV_CON_ID("plla_clk", &plla_clk),
+	CLKDEV_CON_ID("clkz_clk", &clkz_clk),
+	CLKDEV_CON_ID("clkzs_clk", &clkzs_clk),
+
+	/* DIV4 clocks */
+	CLKDEV_CON_ID("shyway_clk",	&clks_clk),
+	CLKDEV_CON_ID("bus_clk",	&clkout_clk),
+	CLKDEV_CON_ID("shyway4_clk",	&clks4_clk),
+	CLKDEV_CON_ID("shyway3_clk",	&clks3_clk),
+	CLKDEV_CON_ID("shyway1_clk",	&clks1_clk),
+	CLKDEV_CON_ID("peripheral_clk",	&clkp_clk),
+
+	/* MSTP32 clocks */
+	CLKDEV_DEV_ID("r8a7779-vin.3", &mstp_clks[MSTP120]), /* VIN3 */
+	CLKDEV_DEV_ID("rcar-pcie", &mstp_clks[MSTP116]), /* PCIe */
+	CLKDEV_DEV_ID("sata_rcar", &mstp_clks[MSTP115]), /* SATA */
+	CLKDEV_DEV_ID("fc600000.sata", &mstp_clks[MSTP115]), /* SATA w/DT */
+	CLKDEV_DEV_ID("r8a777x-ether", &mstp_clks[MSTP114]), /* Ether */
+	CLKDEV_DEV_ID("r8a7779-vin.0", &mstp_clks[MSTP110]), /* VIN0 */
+	CLKDEV_DEV_ID("r8a7779-vin.1", &mstp_clks[MSTP109]), /* VIN1 */
+	CLKDEV_DEV_ID("r8a7779-vin.2", &mstp_clks[MSTP108]), /* VIN2 */
+	CLKDEV_DEV_ID("ehci-platform.1", &mstp_clks[MSTP101]), /* USB EHCI port2 */
+	CLKDEV_DEV_ID("ohci-platform.1", &mstp_clks[MSTP101]), /* USB OHCI port2 */
+	CLKDEV_DEV_ID("ehci-platform.0", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */
+	CLKDEV_DEV_ID("ohci-platform.0", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */
+	CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]), /* TMU0 */
+	CLKDEV_DEV_ID("i2c-rcar.0", &mstp_clks[MSTP030]), /* I2C0 */
+	CLKDEV_DEV_ID("ffc70000.i2c", &mstp_clks[MSTP030]), /* I2C0 */
+	CLKDEV_DEV_ID("i2c-rcar.1", &mstp_clks[MSTP029]), /* I2C1 */
+	CLKDEV_DEV_ID("ffc71000.i2c", &mstp_clks[MSTP029]), /* I2C1 */
+	CLKDEV_DEV_ID("i2c-rcar.2", &mstp_clks[MSTP028]), /* I2C2 */
+	CLKDEV_DEV_ID("ffc72000.i2c", &mstp_clks[MSTP028]), /* I2C2 */
+	CLKDEV_DEV_ID("i2c-rcar.3", &mstp_clks[MSTP027]), /* I2C3 */
+	CLKDEV_DEV_ID("ffc73000.i2c", &mstp_clks[MSTP027]), /* I2C3 */
+	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-hspi.0", &mstp_clks[MSTP007]), /* HSPI0 */
+	CLKDEV_DEV_ID("fffc7000.spi", &mstp_clks[MSTP007]), /* HSPI0 */
+	CLKDEV_DEV_ID("sh-hspi.1", &mstp_clks[MSTP007]), /* HSPI1 */
+	CLKDEV_DEV_ID("fffc8000.spi", &mstp_clks[MSTP007]), /* HSPI1 */
+	CLKDEV_DEV_ID("sh-hspi.2", &mstp_clks[MSTP007]), /* HSPI2 */
+	CLKDEV_DEV_ID("fffc6000.spi", &mstp_clks[MSTP007]), /* HSPI2 */
+	CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP323]), /* SDHI0 */
+	CLKDEV_DEV_ID("ffe4c000.sd", &mstp_clks[MSTP323]), /* SDHI0 */
+	CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP322]), /* SDHI1 */
+	CLKDEV_DEV_ID("ffe4d000.sd", &mstp_clks[MSTP322]), /* SDHI1 */
+	CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP321]), /* SDHI2 */
+	CLKDEV_DEV_ID("ffe4e000.sd", &mstp_clks[MSTP321]), /* SDHI2 */
+	CLKDEV_DEV_ID("sh_mobile_sdhi.3", &mstp_clks[MSTP320]), /* SDHI3 */
+	CLKDEV_DEV_ID("ffe4f000.sd", &mstp_clks[MSTP320]), /* SDHI3 */
+	CLKDEV_DEV_ID("rcar-du-r8a7779", &mstp_clks[MSTP103]), /* DU */
+};
+
+void __init r8a7779_clock_init(void)
+{
+	u32 mode = r8a7779_read_mode_pins();
+	int k, ret = 0;
+
+	if (mode & MD(1)) {
+		plla_clk.rate = 1500000000;
+
+		SH_CLK_SET_RATIO(&clkz_clk_ratio,	2, 3);
+		SH_CLK_SET_RATIO(&clkzs_clk_ratio,	1, 6);
+		SH_CLK_SET_RATIO(&clki_clk_ratio,	1, 2);
+		SH_CLK_SET_RATIO(&clks_clk_ratio,	1, 6);
+		SH_CLK_SET_RATIO(&clks1_clk_ratio,	1, 12);
+		SH_CLK_SET_RATIO(&clks3_clk_ratio,	1, 8);
+		SH_CLK_SET_RATIO(&clks4_clk_ratio,	1, 16);
+		SH_CLK_SET_RATIO(&clkp_clk_ratio,	1, 24);
+		SH_CLK_SET_RATIO(&clkg_clk_ratio,	1, 24);
+		if (mode & MD(2)) {
+			SH_CLK_SET_RATIO(&clkb_clk_ratio,	1, 36);
+			SH_CLK_SET_RATIO(&clkout_clk_ratio,	1, 36);
+		} else {
+			SH_CLK_SET_RATIO(&clkb_clk_ratio,	1, 24);
+			SH_CLK_SET_RATIO(&clkout_clk_ratio,	1, 24);
+		}
+	} else {
+		plla_clk.rate = 1600000000;
+
+		SH_CLK_SET_RATIO(&clkz_clk_ratio,	1, 2);
+		SH_CLK_SET_RATIO(&clkzs_clk_ratio,	1, 8);
+		SH_CLK_SET_RATIO(&clki_clk_ratio,	1, 2);
+		SH_CLK_SET_RATIO(&clks_clk_ratio,	1, 8);
+		SH_CLK_SET_RATIO(&clks1_clk_ratio,	1, 16);
+		SH_CLK_SET_RATIO(&clks3_clk_ratio,	1, 8);
+		SH_CLK_SET_RATIO(&clks4_clk_ratio,	1, 16);
+		SH_CLK_SET_RATIO(&clkp_clk_ratio,	1, 32);
+		SH_CLK_SET_RATIO(&clkg_clk_ratio,	1, 24);
+		if (mode & MD(2)) {
+			SH_CLK_SET_RATIO(&clkb_clk_ratio,	1, 32);
+			SH_CLK_SET_RATIO(&clkout_clk_ratio,	1, 32);
+		} else {
+			SH_CLK_SET_RATIO(&clkb_clk_ratio,	1, 24);
+			SH_CLK_SET_RATIO(&clkout_clk_ratio,	1, 24);
+		}
+	}
+
+	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 r8a7779 clocks\n");
+}
+
+/* do nothing for !CONFIG_SMP or !CONFIG_HAVE_TWD */
+void __init __weak r8a7779_register_twd(void) { }
+
+void __init r8a7779_earlytimer_init(void)
+{
+	r8a7779_clock_init();
+	r8a7779_register_twd();
+	shmobile_earlytimer_init();
+}