armv8/fsl_lsch2: Add fsl_lsch2 SoC

Freescale LayerScape with Chassis Generation 2 is a set of SoCs with
ARMv8 cores and 2rd generation of Chassis.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Signed-off-by: Gong Qianyu <Qianyu.Gong@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

1 files changed, 137 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c
new file mode 100644
index 0000000000..ea3723fe2e
--- /dev/null
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fsl_lsch2_speed.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <linux/compiler.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/soc.h>
+#include <fsl_ifc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_SYS_FSL_NUM_CC_PLLS
+#define CONFIG_SYS_FSL_NUM_CC_PLLS      2
+#endif
+
+void get_sys_info(struct sys_info *sys_info)
+{
+	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
+#ifdef CONFIG_FSL_IFC
+	struct fsl_ifc ifc_regs = {(void *)CONFIG_SYS_IFC_ADDR, (void *)NULL};
+	u32 ccr;
+#endif
+	struct ccsr_clk *clk = (void *)(CONFIG_SYS_FSL_CLK_ADDR);
+	unsigned int cpu;
+	const u8 core_cplx_pll[8] = {
+		[0] = 0,	/* CC1 PPL / 1 */
+		[1] = 0,	/* CC1 PPL / 2 */
+		[4] = 1,	/* CC2 PPL / 1 */
+		[5] = 1,	/* CC2 PPL / 2 */
+	};
+
+	const u8 core_cplx_pll_div[8] = {
+		[0] = 1,	/* CC1 PPL / 1 */
+		[1] = 2,	/* CC1 PPL / 2 */
+		[4] = 1,	/* CC2 PPL / 1 */
+		[5] = 2,	/* CC2 PPL / 2 */
+	};
+
+	uint i;
+	uint freq_c_pll[CONFIG_SYS_FSL_NUM_CC_PLLS];
+	uint ratio[CONFIG_SYS_FSL_NUM_CC_PLLS];
+	unsigned long sysclk = CONFIG_SYS_CLK_FREQ;
+
+	sys_info->freq_systembus = sysclk;
+#ifdef CONFIG_DDR_CLK_FREQ
+	sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
+#else
+	sys_info->freq_ddrbus = sysclk;
+#endif
+
+	sys_info->freq_systembus *= (gur_in32(&gur->rcwsr[0]) >>
+			FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_SHIFT) &
+			FSL_CHASSIS2_RCWSR0_SYS_PLL_RAT_MASK;
+	sys_info->freq_ddrbus *= (gur_in32(&gur->rcwsr[0]) >>
+			FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_SHIFT) &
+			FSL_CHASSIS2_RCWSR0_MEM_PLL_RAT_MASK;
+
+	for (i = 0; i < CONFIG_SYS_FSL_NUM_CC_PLLS; i++) {
+		ratio[i] = (in_be32(&clk->pllcgsr[i].pllcngsr) >> 1) & 0xff;
+		if (ratio[i] > 4)
+			freq_c_pll[i] = sysclk * ratio[i];
+		else
+			freq_c_pll[i] = sys_info->freq_systembus * ratio[i];
+	}
+
+	for (cpu = 0; cpu < CONFIG_MAX_CPUS; cpu++) {
+		u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
+				& 0xf;
+		u32 cplx_pll = core_cplx_pll[c_pll_sel];
+
+		sys_info->freq_processor[cpu] =
+			freq_c_pll[cplx_pll] / core_cplx_pll_div[c_pll_sel];
+	}
+
+#define HWA_CGA_M1_CLK_SEL	0xe0000000
+#define HWA_CGA_M1_CLK_SHIFT	29
+
+#define HWA_CGA_M2_CLK_SEL	0x00000007
+#define HWA_CGA_M2_CLK_SHIFT	0
+
+#if defined(CONFIG_FSL_IFC)
+	ccr = ifc_in32(&ifc_regs.gregs->ifc_ccr);
+	ccr = ((ccr & IFC_CCR_CLK_DIV_MASK) >> IFC_CCR_CLK_DIV_SHIFT) + 1;
+
+	sys_info->freq_localbus = sys_info->freq_systembus / ccr;
+#endif
+}
+
+int get_clocks(void)
+{
+	struct sys_info sys_info;
+
+	get_sys_info(&sys_info);
+	gd->cpu_clk = sys_info.freq_processor[0];
+	gd->bus_clk = sys_info.freq_systembus;
+	gd->mem_clk = sys_info.freq_ddrbus;
+
+	if (gd->cpu_clk != 0)
+		return 0;
+	else
+		return 1;
+}
+
+ulong get_bus_freq(ulong dummy)
+{
+	return gd->bus_clk;
+}
+
+ulong get_ddr_freq(ulong dummy)
+{
+	return gd->mem_clk;
+}
+
+int get_serial_clock(void)
+{
+	return gd->bus_clk;
+}
+
+unsigned int mxc_get_clock(enum mxc_clock clk)
+{
+	switch (clk) {
+	case MXC_I2C_CLK:
+		return get_bus_freq(0);
+	case MXC_DSPI_CLK:
+		return get_bus_freq(0);
+	case MXC_UART_CLK:
+		return get_bus_freq(0);
+	default:
+		printf("Unsupported clock\n");
+	}
+	return 0;
+}