armv8: s32v234: Introduce basic support for s32v234evb

Add initial support for NXP's S32V234 SoC and S32V234EVB board.

The S32V230 family is designed to support computation-intensive applications
for image processing. The S32V234, as part of the S32V230 family, is a
high-performance automotive processor designed to support safe
computation-intensive applications in the area of vision and sensor fusion.

Code originally writen by:
Original-signed-off-by: Stoica Cosmin-Stefan <cosminstefan.stoica@freescale.com>
Original-signed-off-by: Mihaela Martinas <Mihaela.Martinas@freescale.com>
Original-signed-off-by: Eddy Petrișor <eddy.petrisor@gmail.com>

Signed-off-by: Eddy Petrișor <eddy.petrisor@nxp.com>

1 files changed, 350 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv8/s32v234/generic.c b/arch/arm/cpu/armv8/s32v234/generic.c
new file mode 100644
index 0000000000..7bb894ecb7
--- /dev/null
+++ b/arch/arm/cpu/armv8/s32v234/generic.c
@@ -0,0 +1,350 @@
+/*
+ * (C) Copyright 2013-2016, Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/mc_cgm_regs.h>
+#include <asm/arch/mc_me_regs.h>
+#include <asm/arch/mc_rgm_regs.h>
+#include <netdev.h>
+#include <div64.h>
+#include <errno.h>
+
+u32 get_cpu_rev(void)
+{
+	struct mscm_ir *mscmir = (struct mscm_ir *)MSCM_BASE_ADDR;
+	u32 cpu = readl(&mscmir->cpxtype);
+
+	return cpu;
+}
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static uintptr_t get_pllfreq(u32 pll, u32 refclk_freq, u32 plldv,
+			     u32 pllfd, u32 selected_output)
+{
+	u32 vco = 0, plldv_prediv = 0, plldv_mfd = 0, pllfd_mfn = 0;
+	u32 plldv_rfdphi_div = 0, fout = 0;
+	u32 dfs_portn = 0, dfs_mfn = 0, dfs_mfi = 0;
+
+	if (selected_output > DFS_MAXNUMBER) {
+		return -1;
+	}
+
+	plldv_prediv =
+	    (plldv & PLLDIG_PLLDV_PREDIV_MASK) >> PLLDIG_PLLDV_PREDIV_OFFSET;
+	plldv_mfd = (plldv & PLLDIG_PLLDV_MFD_MASK);
+
+	pllfd_mfn = (pllfd & PLLDIG_PLLFD_MFN_MASK);
+
+	plldv_prediv = plldv_prediv == 0 ? 1 : plldv_prediv;
+
+	/* The formula for VCO is from TR manual, rev. D */
+	vco = refclk_freq / plldv_prediv * (plldv_mfd + pllfd_mfn / 20481);
+
+	if (selected_output != 0) {
+		/* Determine the RFDPHI for PHI1 */
+		plldv_rfdphi_div =
+		    (plldv & PLLDIG_PLLDV_RFDPHI1_MASK) >>
+		    PLLDIG_PLLDV_RFDPHI1_OFFSET;
+		plldv_rfdphi_div = plldv_rfdphi_div == 0 ? 1 : plldv_rfdphi_div;
+		if (pll == ARM_PLL || pll == ENET_PLL || pll == DDR_PLL) {
+			dfs_portn =
+			    readl(DFS_DVPORTn(pll, selected_output - 1));
+			dfs_mfi =
+			    (dfs_portn & DFS_DVPORTn_MFI_MASK) >>
+			    DFS_DVPORTn_MFI_OFFSET;
+			dfs_mfn =
+			    (dfs_portn & DFS_DVPORTn_MFI_MASK) >>
+			    DFS_DVPORTn_MFI_OFFSET;
+			fout = vco / (dfs_mfi + (dfs_mfn / 256));
+		} else {
+			fout = vco / plldv_rfdphi_div;
+		}
+
+	} else {
+		/* Determine the RFDPHI for PHI0 */
+		plldv_rfdphi_div =
+		    (plldv & PLLDIG_PLLDV_RFDPHI_MASK) >>
+		    PLLDIG_PLLDV_RFDPHI_OFFSET;
+		fout = vco / plldv_rfdphi_div;
+	}
+
+	return fout;
+
+}
+
+/* Implemented for ARMPLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_LL */
+static uintptr_t decode_pll(enum pll_type pll, u32 refclk_freq,
+			    u32 selected_output)
+{
+	u32 plldv, pllfd;
+
+	plldv = readl(PLLDIG_PLLDV(pll));
+	pllfd = readl(PLLDIG_PLLFD(pll));
+
+	return get_pllfreq(pll, refclk_freq, plldv, pllfd, selected_output);
+}
+
+static u32 get_mcu_main_clk(void)
+{
+	u32 coreclk_div;
+	u32 sysclk_sel;
+	u32 freq = 0;
+
+	sysclk_sel = readl(CGM_SC_SS(MC_CGM1_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
+	sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
+
+	coreclk_div =
+	    readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, 0)) & MC_CGM_SC_DCn_PREDIV_MASK;
+	coreclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
+	coreclk_div += 1;
+
+	switch (sysclk_sel) {
+	case MC_CGM_SC_SEL_FIRC:
+		freq = FIRC_CLK_FREQ;
+		break;
+	case MC_CGM_SC_SEL_XOSC:
+		freq = XOSC_CLK_FREQ;
+		break;
+	case MC_CGM_SC_SEL_ARMPLL:
+		/* ARMPLL has as source XOSC and CORE_CLK has as input PHI0 */
+		freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 0);
+		break;
+	case MC_CGM_SC_SEL_CLKDISABLE:
+		printf("Sysclk is disabled\n");
+		break;
+	default:
+		printf("unsupported system clock select\n");
+	}
+
+	return freq / coreclk_div;
+}
+
+static u32 get_sys_clk(u32 number)
+{
+	u32 sysclk_div, sysclk_div_number;
+	u32 sysclk_sel;
+	u32 freq = 0;
+
+	switch (number) {
+	case 3:
+		sysclk_div_number = 0;
+		break;
+	case 6:
+		sysclk_div_number = 1;
+		break;
+	default:
+		printf("unsupported system clock \n");
+		return -1;
+	}
+	sysclk_sel = readl(CGM_SC_SS(MC_CGM0_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
+	sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
+
+	sysclk_div =
+	    readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, sysclk_div_number)) &
+	    MC_CGM_SC_DCn_PREDIV_MASK;
+	sysclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
+	sysclk_div += 1;
+
+	switch (sysclk_sel) {
+	case MC_CGM_SC_SEL_FIRC:
+		freq = FIRC_CLK_FREQ;
+		break;
+	case MC_CGM_SC_SEL_XOSC:
+		freq = XOSC_CLK_FREQ;
+		break;
+	case MC_CGM_SC_SEL_ARMPLL:
+		/* ARMPLL has as source XOSC and SYSn_CLK has as input DFS1 */
+		freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 1);
+		break;
+	case MC_CGM_SC_SEL_CLKDISABLE:
+		printf("Sysclk is disabled\n");
+		break;
+	default:
+		printf("unsupported system clock select\n");
+	}
+
+	return freq / sysclk_div;
+}
+
+static u32 get_peripherals_clk(void)
+{
+	u32 aux5clk_div;
+	u32 freq = 0;
+
+	aux5clk_div =
+	    readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 5, 0)) &
+	    MC_CGM_ACn_DCm_PREDIV_MASK;
+	aux5clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
+	aux5clk_div += 1;
+
+	freq = decode_pll(PERIPH_PLL, XOSC_CLK_FREQ, 0);
+
+	return freq / aux5clk_div;
+
+}
+
+static u32 get_uart_clk(void)
+{
+	u32 auxclk3_div, auxclk3_sel, freq = 0;
+
+	auxclk3_sel =
+	    readl(CGM_ACn_SS(MC_CGM0_BASE_ADDR, 3)) & MC_CGM_ACn_SEL_MASK;
+	auxclk3_sel >>= MC_CGM_ACn_SEL_OFFSET;
+
+	auxclk3_div =
+	    readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 3, 0)) &
+	    MC_CGM_ACn_DCm_PREDIV_MASK;
+	auxclk3_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
+	auxclk3_div += 1;
+
+	switch (auxclk3_sel) {
+	case MC_CGM_ACn_SEL_FIRC:
+		freq = FIRC_CLK_FREQ;
+		break;
+	case MC_CGM_ACn_SEL_XOSC:
+		freq = XOSC_CLK_FREQ;
+		break;
+	case MC_CGM_ACn_SEL_PERPLLDIVX:
+		freq = get_peripherals_clk() / 3;
+		break;
+	case MC_CGM_ACn_SEL_SYSCLK:
+		freq = get_sys_clk(6);
+		break;
+	default:
+		printf("unsupported system clock select\n");
+	}
+
+	return freq / auxclk3_div;
+}
+
+static u32 get_fec_clk(void)
+{
+	u32 aux2clk_div;
+	u32 freq = 0;
+
+	aux2clk_div =
+	    readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 2, 0)) &
+	    MC_CGM_ACn_DCm_PREDIV_MASK;
+	aux2clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
+	aux2clk_div += 1;
+
+	freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 0);
+
+	return freq / aux2clk_div;
+}
+
+static u32 get_usdhc_clk(void)
+{
+	u32 aux15clk_div;
+	u32 freq = 0;
+
+	aux15clk_div =
+	    readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 15, 0)) &
+	    MC_CGM_ACn_DCm_PREDIV_MASK;
+	aux15clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
+	aux15clk_div += 1;
+
+	freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 4);
+
+	return freq / aux15clk_div;
+}
+
+static u32 get_i2c_clk(void)
+{
+	return get_peripherals_clk();
+}
+
+/* return clocks in Hz */
+unsigned int mxc_get_clock(enum mxc_clock clk)
+{
+	switch (clk) {
+	case MXC_ARM_CLK:
+		return get_mcu_main_clk();
+	case MXC_PERIPHERALS_CLK:
+		return get_peripherals_clk();
+	case MXC_UART_CLK:
+		return get_uart_clk();
+	case MXC_FEC_CLK:
+		return get_fec_clk();
+	case MXC_I2C_CLK:
+		return get_i2c_clk();
+	case MXC_USDHC_CLK:
+		return get_usdhc_clk();
+	default:
+		break;
+	}
+	printf("Error: Unsupported function to read the frequency! \
+			Please define it correctly!");
+	return -1;
+}
+
+/* Not yet implemented - int soc_clk_dump(); */
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+static char *get_reset_cause(void)
+{
+	u32 cause = readl(MC_RGM_BASE_ADDR + 0x300);
+
+	switch (cause) {
+	case F_SWT4:
+		return "WDOG";
+	case F_JTAG:
+		return "JTAG";
+	case F_FCCU_SOFT:
+		return "FCCU soft reaction";
+	case F_FCCU_HARD:
+		return "FCCU hard reaction";
+	case F_SOFT_FUNC:
+		return "Software Functional reset";
+	case F_ST_DONE:
+		return "Self Test done reset";
+	case F_EXT_RST:
+		return "External reset";
+	default:
+		return "unknown reset";
+	}
+
+}
+
+#define SRC_SCR_SW_RST					(1<<12)
+
+void reset_cpu(ulong addr)
+{
+	printf("Feature not supported.\n");
+};
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   Freescale Treerunner S32V234 at %d MHz\n",
+	       mxc_get_clock(MXC_ARM_CLK) / 1000000);
+	printf("Reset cause: %s\n", get_reset_cause());
+
+	return 0;
+}
+#endif
+
+int cpu_eth_init(bd_t * bis)
+{
+	int rc = -ENODEV;
+
+#if defined(CONFIG_FEC_MXC)
+	rc = fecmxc_initialize(bis);
+#endif
+
+	return rc;
+}
+
+int get_clocks(void)
+{
+#ifdef CONFIG_FSL_ESDHC
+	gd->arch.sdhc_clk = mxc_get_clock(MXC_USDHC_CLK);
+#endif
+	return 0;
+}