--- /dev/null
+/*
+ * (C) Copyright 2009 DENX Software Engineering
+ * Author: John Rigby <jrigby@gmail.com>
+ *
+ * Based on mx27/generic.c:
+ * Copyright (c) 2008 Eric Jarrige <eric.jarrige@armadeus.org>
+ * Copyright (c) 2009 Ilya Yanok <yanok@emcraft.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <div64.h>
+#include <netdev.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+
+#ifdef CONFIG_FSL_ESDHC
+#include <fsl_esdhc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+/*
+ * get the system pll clock in Hz
+ *
+ * mfi + mfn / (mfd +1)
+ * f = 2 * f_ref * --------------------
+ * pd + 1
+ */
+static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
+{
+ unsigned int mfi = (pll >> CCM_PLL_MFI_SHIFT)
+ & CCM_PLL_MFI_MASK;
+ int mfn = (pll >> CCM_PLL_MFN_SHIFT)
+ & CCM_PLL_MFN_MASK;
+ unsigned int mfd = (pll >> CCM_PLL_MFD_SHIFT)
+ & CCM_PLL_MFD_MASK;
+ unsigned int pd = (pll >> CCM_PLL_PD_SHIFT)
+ & CCM_PLL_PD_MASK;
+
+ mfi = mfi <= 5 ? 5 : mfi;
+ mfn = mfn >= 512 ? mfn - 1024 : mfn;
+ mfd += 1;
+ pd += 1;
+
+ return lldiv(2 * (u64) f_ref * (mfi * mfd + mfn),
+ mfd * pd);
+}
+
+static ulong imx_get_mpllclk(void)
+{
+ struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
+ ulong fref = MXC_HCLK;
+
+ return imx_decode_pll(readl(&ccm->mpctl), fref);
+}
+
+static ulong imx_get_armclk(void)
+{
+ struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
+ ulong cctl = readl(&ccm->cctl);
+ ulong fref = imx_get_mpllclk();
+ ulong div;
+
+ if (cctl & CCM_CCTL_ARM_SRC)
+ fref = lldiv((u64) fref * 3, 4);
+
+ div = ((cctl >> CCM_CCTL_ARM_DIV_SHIFT)
+ & CCM_CCTL_ARM_DIV_MASK) + 1;
+
+ return fref / div;
+}
+
+static ulong imx_get_ahbclk(void)
+{
+ struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
+ ulong cctl = readl(&ccm->cctl);
+ ulong fref = imx_get_armclk();
+ ulong div;
+
+ div = ((cctl >> CCM_CCTL_AHB_DIV_SHIFT)
+ & CCM_CCTL_AHB_DIV_MASK) + 1;
+
+ return fref / div;
+}
+
+static ulong imx_get_ipgclk(void)
+{
+ return imx_get_ahbclk() / 2;
+}
+
+static ulong imx_get_perclk(int clk)
+{
+ struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
+ ulong fref = imx_get_ahbclk();
+ ulong div;
+
+ div = readl(&ccm->pcdr[CCM_PERCLK_REG(clk)]);
+ div = ((div >> CCM_PERCLK_SHIFT(clk)) & CCM_PERCLK_MASK) + 1;
+
+ return fref / div;
+}
+
+unsigned int mxc_get_clock(enum mxc_clock clk)
+{
+ if (clk >= MXC_CLK_NUM)
+ return -1;
+ switch (clk) {
+ case MXC_ARM_CLK:
+ return imx_get_armclk();
+ case MXC_AHB_CLK:
+ return imx_get_ahbclk();
+ case MXC_IPG_CLK:
+ case MXC_CSPI_CLK:
+ case MXC_FEC_CLK:
+ return imx_get_ipgclk();
+ default:
+ return imx_get_perclk(clk);
+ }
+}
+
+u32 get_cpu_rev(void)
+{
+ u32 srev;
+ u32 system_rev = 0x25000;
+
+ /* read SREV register from IIM module */
+ struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+ srev = readl(&iim->iim_srev);
+
+ switch (srev) {
+ case 0x00:
+ system_rev |= CHIP_REV_1_0;
+ break;
+ case 0x01:
+ system_rev |= CHIP_REV_1_1;
+ break;
+ case 0x02:
+ system_rev |= CHIP_REV_1_2;
+ break;
+ default:
+ system_rev |= 0x8000;
+ break;
+ }
+
+ return system_rev;
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+static char *get_reset_cause(void)
+{
+ /* read RCSR register from CCM module */
+ struct ccm_regs *ccm =
+ (struct ccm_regs *)IMX_CCM_BASE;
+
+ u32 cause = readl(&ccm->rcsr) & 0x0f;
+
+ if (cause == 0)
+ return "POR";
+ else if (cause == 1)
+ return "RST";
+ else if ((cause & 2) == 2)
+ return "WDOG";
+ else if ((cause & 4) == 4)
+ return "SW RESET";
+ else if ((cause & 8) == 8)
+ return "JTAG";
+ else
+ return "unknown reset";
+
+}
+
+int print_cpuinfo(void)
+{
+ char buf[32];
+ u32 cpurev = get_cpu_rev();
+
+ printf("CPU: Freescale i.MX25 rev%d.%d%s at %s MHz\n",
+ (cpurev & 0xF0) >> 4, (cpurev & 0x0F),
+ ((cpurev & 0x8000) ? " unknown" : ""),
+ strmhz(buf, imx_get_armclk()));
+ printf("Reset cause: %s\n\n", get_reset_cause());
+ return 0;
+}
+#endif
+
+void enable_caches(void)
+{
+#ifndef CONFIG_SYS_DCACHE_OFF
+ /* Enable D-cache. I-cache is already enabled in start.S */
+ dcache_enable();
+#endif
+}
+
+#if defined(CONFIG_FEC_MXC)
+/*
+ * Initializes on-chip ethernet controllers.
+ * to override, implement board_eth_init()
+ */
+int cpu_eth_init(bd_t *bis)
+{
+ struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE;
+ ulong val;
+
+ val = readl(&ccm->cgr0);
+ val |= (1 << 23);
+ writel(val, &ccm->cgr0);
+ return fecmxc_initialize(bis);
+}
+#endif
+
+int get_clocks(void)
+{
+#ifdef CONFIG_FSL_ESDHC
+#if CONFIG_SYS_FSL_ESDHC_ADDR == IMX_MMC_SDHC2_BASE
+ gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+#else
+ gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+#endif
+#endif
+ return 0;
+}
+
+#ifdef CONFIG_FSL_ESDHC
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+ return fsl_esdhc_mmc_init(bis);
+}
+#endif
+
+#ifdef CONFIG_FEC_MXC
+void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
+{
+ int i;
+ struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+ struct fuse_bank *bank = &iim->bank[0];
+ struct fuse_bank0_regs *fuse =
+ (struct fuse_bank0_regs *)bank->fuse_regs;
+
+ for (i = 0; i < 6; i++)
+ mac[i] = readl(&fuse->mac_addr[i]) & 0xff;
+}
+#endif /* CONFIG_FEC_MXC */
Code Review / kvmfornfv.git / blobdiff