1 files changed, 454 insertions, 0 deletions
diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
new file mode 100644
index 000000000000..ccccae262351
--- /dev/null
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -0,0 +1,454 @@
+/* linux/arch/arm/mach-s5pv210/clock.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * S5PV210 - Clock support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/sysdev.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+
+#include <plat/cpu-freq.h>
+#include <mach/regs-clock.h>
+#include <plat/clock.h>
+#include <plat/cpu.h>
+#include <plat/pll.h>
+#include <plat/s5p-clock.h>
+#include <plat/clock-clksrc.h>
+#include <plat/s5pv210.h>
+
+static int s5pv210_clk_ip0_ctrl(struct clk *clk, int enable)
+{
+	return s5p_gatectrl(S5P_CLKGATE_IP0, clk, enable);
+}
+
+static int s5pv210_clk_ip1_ctrl(struct clk *clk, int enable)
+{
+	return s5p_gatectrl(S5P_CLKGATE_IP1, clk, enable);
+}
+
+static int s5pv210_clk_ip2_ctrl(struct clk *clk, int enable)
+{
+	return s5p_gatectrl(S5P_CLKGATE_IP2, clk, enable);
+}
+
+static int s5pv210_clk_ip3_ctrl(struct clk *clk, int enable)
+{
+	return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
+}
+
+static struct clk clk_h200 = {
+	.name		= "hclk200",
+	.id		= -1,
+};
+
+static struct clk clk_h100 = {
+	.name		= "hclk100",
+	.id		= -1,
+};
+
+static struct clk clk_h166 = {
+	.name		= "hclk166",
+	.id		= -1,
+};
+
+static struct clk clk_h133 = {
+	.name		= "hclk133",
+	.id		= -1,
+};
+
+static struct clk clk_p100 = {
+	.name		= "pclk100",
+	.id		= -1,
+};
+
+static struct clk clk_p83 = {
+	.name		= "pclk83",
+	.id		= -1,
+};
+
+static struct clk clk_p66 = {
+	.name		= "pclk66",
+	.id		= -1,
+};
+
+static struct clk *sys_clks[] = {
+	&clk_h200,
+	&clk_h100,
+	&clk_h166,
+	&clk_h133,
+	&clk_p100,
+	&clk_p83,
+	&clk_p66
+};
+
+static struct clk init_clocks_disable[] = {
+	{
+		.name		= "rot",
+		.id		= -1,
+		.parent		= &clk_h166,
+		.enable		= s5pv210_clk_ip0_ctrl,
+		.ctrlbit	= (1<<29),
+	}, {
+		.name		= "otg",
+		.id		= -1,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip1_ctrl,
+		.ctrlbit	= (1<<16),
+	}, {
+		.name		= "usb-host",
+		.id		= -1,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip1_ctrl,
+		.ctrlbit	= (1<<17),
+	}, {
+		.name		= "lcd",
+		.id		= -1,
+		.parent		= &clk_h166,
+		.enable		= s5pv210_clk_ip1_ctrl,
+		.ctrlbit	= (1<<0),
+	}, {
+		.name		= "cfcon",
+		.id		= 0,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip1_ctrl,
+		.ctrlbit	= (1<<25),
+	}, {
+		.name		= "hsmmc",
+		.id		= 0,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip2_ctrl,
+		.ctrlbit	= (1<<16),
+	}, {
+		.name		= "hsmmc",
+		.id		= 1,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip2_ctrl,
+		.ctrlbit	= (1<<17),
+	}, {
+		.name		= "hsmmc",
+		.id		= 2,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip2_ctrl,
+		.ctrlbit	= (1<<18),
+	}, {
+		.name		= "hsmmc",
+		.id		= 3,
+		.parent		= &clk_h133,
+		.enable		= s5pv210_clk_ip2_ctrl,
+		.ctrlbit	= (1<<19),
+	}, {
+		.name		= "systimer",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<16),
+	}, {
+		.name		= "watchdog",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<22),
+	}, {
+		.name		= "rtc",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<15),
+	}, {
+		.name		= "i2c",
+		.id		= 0,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<7),
+	}, {
+		.name		= "i2c",
+		.id		= 1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<8),
+	}, {
+		.name		= "i2c",
+		.id		= 2,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<9),
+	}, {
+		.name		= "spi",
+		.id		= 0,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<12),
+	}, {
+		.name		= "spi",
+		.id		= 1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<13),
+	}, {
+		.name		= "spi",
+		.id		= 2,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<14),
+	}, {
+		.name		= "timers",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<23),
+	}, {
+		.name		= "adc",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<24),
+	}, {
+		.name		= "keypad",
+		.id		= -1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<21),
+	}, {
+		.name		= "i2s_v50",
+		.id		= 0,
+		.parent		= &clk_p,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<4),
+	}, {
+		.name		= "i2s_v32",
+		.id		= 0,
+		.parent		= &clk_p,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<4),
+	}, {
+		.name		= "i2s_v32",
+		.id		= 1,
+		.parent		= &clk_p,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<4),
+	}
+};
+
+static struct clk init_clocks[] = {
+	{
+		.name		= "uart",
+		.id		= 0,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<7),
+	}, {
+		.name		= "uart",
+		.id		= 1,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<8),
+	}, {
+		.name		= "uart",
+		.id		= 2,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<9),
+	}, {
+		.name		= "uart",
+		.id		= 3,
+		.parent		= &clk_p66,
+		.enable		= s5pv210_clk_ip3_ctrl,
+		.ctrlbit	= (1<<10),
+	},
+};
+
+static struct clksrc_clk clk_mout_apll = {
+	.clk	= {
+		.name		= "mout_apll",
+		.id		= -1,
+	},
+	.sources	= &clk_src_apll,
+	.reg_src	= { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
+};
+
+static struct clksrc_clk clk_mout_epll = {
+	.clk	= {
+		.name		= "mout_epll",
+		.id		= -1,
+	},
+	.sources	= &clk_src_epll,
+	.reg_src	= { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 },
+};
+
+static struct clksrc_clk clk_mout_mpll = {
+	.clk = {
+		.name		= "mout_mpll",
+		.id		= -1,
+	},
+	.sources	= &clk_src_mpll,
+	.reg_src	= { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 },
+};
+
+static struct clk *clkset_uart_list[] = {
+	[6] = &clk_mout_mpll.clk,
+	[7] = &clk_mout_epll.clk,
+};
+
+static struct clksrc_sources clkset_uart = {
+	.sources	= clkset_uart_list,
+	.nr_sources	= ARRAY_SIZE(clkset_uart_list),
+};
+
+static struct clksrc_clk clksrcs[] = {
+	{
+		.clk	= {
+			.name		= "uclk1",
+			.id		= -1,
+			.ctrlbit	= (1<<17),
+			.enable		= s5pv210_clk_ip3_ctrl,
+		},
+		.sources = &clkset_uart,
+		.reg_src = { .reg = S5P_CLK_SRC4, .shift = 16, .size = 4 },
+		.reg_div = { .reg = S5P_CLK_DIV4, .shift = 16, .size = 4 },
+	}
+};
+
+/* Clock initialisation code */
+static struct clksrc_clk *init_parents[] = {
+	&clk_mout_apll,
+	&clk_mout_epll,
+	&clk_mout_mpll,
+};
+
+#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
+
+void __init_or_cpufreq s5pv210_setup_clocks(void)
+{
+	struct clk *xtal_clk;
+	unsigned long xtal;
+	unsigned long armclk;
+	unsigned long hclk200;
+	unsigned long hclk166;
+	unsigned long hclk133;
+	unsigned long pclk100;
+	unsigned long pclk83;
+	unsigned long pclk66;
+	unsigned long apll;
+	unsigned long mpll;
+	unsigned long epll;
+	unsigned int ptr;
+	u32 clkdiv0, clkdiv1;
+
+	printk(KERN_DEBUG "%s: registering clocks\n", __func__);
+
+	clkdiv0 = __raw_readl(S5P_CLK_DIV0);
+	clkdiv1 = __raw_readl(S5P_CLK_DIV1);
+
+	printk(KERN_DEBUG "%s: clkdiv0 = %08x, clkdiv1 = %08x\n",
+				__func__, clkdiv0, clkdiv1);
+
+	xtal_clk = clk_get(NULL, "xtal");
+	BUG_ON(IS_ERR(xtal_clk));
+
+	xtal = clk_get_rate(xtal_clk);
+	clk_put(xtal_clk);
+
+	printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
+
+	apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
+	mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
+	epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
+
+	printk(KERN_INFO "S5PV210: PLL settings, A=%ld, M=%ld, E=%ld",
+			apll, mpll, epll);
+
+	armclk = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_APLL);
+	if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX200_MASK)
+		hclk200 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
+	else
+		hclk200 = armclk / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
+
+	if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX166_MASK) {
+		hclk166 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
+		hclk166 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
+	} else
+		hclk166 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
+
+	if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX133_MASK) {
+		hclk133 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
+		hclk133 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
+	} else
+		hclk133 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
+
+	pclk100 = hclk200 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK100);
+	pclk83 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK83);
+	pclk66 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK66);
+
+	printk(KERN_INFO "S5PV210: ARMCLK=%ld, HCLKM=%ld, HCLKD=%ld, \
+			HCLKP=%ld, PCLKM=%ld, PCLKD=%ld, PCLKP=%ld\n",
+	       armclk, hclk200, hclk166, hclk133, pclk100, pclk83, pclk66);
+
+	clk_fout_apll.rate = apll;
+	clk_fout_mpll.rate = mpll;
+	clk_fout_epll.rate = epll;
+
+	clk_f.rate = armclk;
+	clk_h.rate = hclk133;
+	clk_p.rate = pclk66;
+	clk_p66.rate = pclk66;
+	clk_p83.rate = pclk83;
+	clk_h133.rate = hclk133;
+	clk_h166.rate = hclk166;
+	clk_h200.rate = hclk200;
+
+	for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
+		s3c_set_clksrc(init_parents[ptr], true);
+
+	for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
+		s3c_set_clksrc(&clksrcs[ptr], true);
+}
+
+static struct clk *clks[] __initdata = {
+	&clk_mout_epll.clk,
+	&clk_mout_mpll.clk,
+};
+
+void __init s5pv210_register_clocks(void)
+{
+	struct clk *clkp;
+	int ret;
+	int ptr;
+
+	ret = s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
+	if (ret > 0)
+		printk(KERN_ERR "Failed to register %u clocks\n", ret);
+
+	s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
+	s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
+
+	ret = s3c24xx_register_clocks(sys_clks, ARRAY_SIZE(sys_clks));
+	if (ret > 0)
+		printk(KERN_ERR "Failed to register system clocks\n");
+
+	clkp = init_clocks_disable;
+	for (ptr = 0; ptr < ARRAY_SIZE(init_clocks_disable); ptr++, clkp++) {
+		ret = s3c24xx_register_clock(clkp);
+		if (ret < 0) {
+			printk(KERN_ERR "Failed to register clock %s (%d)\n",
+			       clkp->name, ret);
+		}
+		(clkp->enable)(clkp, 0);
+	}
+
+	s3c_pwmclk_init();
+}