--- /dev/null
+/*
+ * Freescale i.MX23/i.MX28 common code
+ *
+ * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * Based on code from LTIB:
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/imx-common/dma.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Lowlevel init isn't used on i.MX28, so just have a dummy here */
+inline void lowlevel_init(void) {}
+
+void reset_cpu(ulong ignored) __attribute__((noreturn));
+
+void reset_cpu(ulong ignored)
+{
+ struct mxs_rtc_regs *rtc_regs =
+ (struct mxs_rtc_regs *)MXS_RTC_BASE;
+ struct mxs_lcdif_regs *lcdif_regs =
+ (struct mxs_lcdif_regs *)MXS_LCDIF_BASE;
+
+ /*
+ * Shut down the LCD controller as it interferes with BootROM boot mode
+ * pads sampling.
+ */
+ writel(LCDIF_CTRL_RUN, &lcdif_regs->hw_lcdif_ctrl_clr);
+
+ /* Wait 1 uS before doing the actual watchdog reset */
+ writel(1, &rtc_regs->hw_rtc_watchdog);
+ writel(RTC_CTRL_WATCHDOGEN, &rtc_regs->hw_rtc_ctrl_set);
+
+ /* Endless loop, reset will exit from here */
+ for (;;)
+ ;
+}
+
+void enable_caches(void)
+{
+#ifndef CONFIG_SYS_ICACHE_OFF
+ icache_enable();
+#endif
+#ifndef CONFIG_SYS_DCACHE_OFF
+ dcache_enable();
+#endif
+}
+
+/*
+ * This function will craft a jumptable at 0x0 which will redirect interrupt
+ * vectoring to proper location of U-Boot in RAM.
+ *
+ * The structure of the jumptable will be as follows:
+ * ldr pc, [pc, #0x18] ..... for each vector, thus repeated 8 times
+ * <destination address> ... for each previous ldr, thus also repeated 8 times
+ *
+ * The "ldr pc, [pc, #0x18]" instruction above loads address from memory at
+ * offset 0x18 from current value of PC register. Note that PC is already
+ * incremented by 4 when computing the offset, so the effective offset is
+ * actually 0x20, this the associated <destination address>. Loading the PC
+ * register with an address performs a jump to that address.
+ */
+void mx28_fixup_vt(uint32_t start_addr)
+{
+ /* ldr pc, [pc, #0x18] */
+ const uint32_t ldr_pc = 0xe59ff018;
+ /* Jumptable location is 0x0 */
+ uint32_t *vt = (uint32_t *)0x0;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ vt[i] = ldr_pc;
+ vt[i + 8] = start_addr + (4 * i);
+ }
+}
+
+#ifdef CONFIG_ARCH_MISC_INIT
+int arch_misc_init(void)
+{
+ mx28_fixup_vt(gd->relocaddr);
+ return 0;
+}
+#endif
+
+int arch_cpu_init(void)
+{
+ struct mxs_clkctrl_regs *clkctrl_regs =
+ (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+ extern uint32_t _start;
+
+ mx28_fixup_vt((uint32_t)&_start);
+
+ /*
+ * Enable NAND clock
+ */
+ /* Clear bypass bit */
+ writel(CLKCTRL_CLKSEQ_BYPASS_GPMI,
+ &clkctrl_regs->hw_clkctrl_clkseq_set);
+
+ /* Set GPMI clock to ref_gpmi / 12 */
+ clrsetbits_le32(&clkctrl_regs->hw_clkctrl_gpmi,
+ CLKCTRL_GPMI_CLKGATE | CLKCTRL_GPMI_DIV_MASK, 1);
+
+ udelay(1000);
+
+ /*
+ * Configure GPIO unit
+ */
+ mxs_gpio_init();
+
+#ifdef CONFIG_APBH_DMA
+ /* Start APBH DMA */
+ mxs_dma_init();
+#endif
+
+ return 0;
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+static const char *get_cpu_type(void)
+{
+ struct mxs_digctl_regs *digctl_regs =
+ (struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
+
+ switch (readl(&digctl_regs->hw_digctl_chipid) & HW_DIGCTL_CHIPID_MASK) {
+ case HW_DIGCTL_CHIPID_MX23:
+ return "23";
+ case HW_DIGCTL_CHIPID_MX28:
+ return "28";
+ default:
+ return "??";
+ }
+}
+
+static const char *get_cpu_rev(void)
+{
+ struct mxs_digctl_regs *digctl_regs =
+ (struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
+ uint8_t rev = readl(&digctl_regs->hw_digctl_chipid) & 0x000000FF;
+
+ switch (readl(&digctl_regs->hw_digctl_chipid) & HW_DIGCTL_CHIPID_MASK) {
+ case HW_DIGCTL_CHIPID_MX23:
+ switch (rev) {
+ case 0x0:
+ return "1.0";
+ case 0x1:
+ return "1.1";
+ case 0x2:
+ return "1.2";
+ case 0x3:
+ return "1.3";
+ case 0x4:
+ return "1.4";
+ default:
+ return "??";
+ }
+ case HW_DIGCTL_CHIPID_MX28:
+ switch (rev) {
+ case 0x1:
+ return "1.2";
+ default:
+ return "??";
+ }
+ default:
+ return "??";
+ }
+}
+
+int print_cpuinfo(void)
+{
+ struct mxs_spl_data *data = (struct mxs_spl_data *)
+ ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
+
+ printf("CPU: Freescale i.MX%s rev%s at %d MHz\n",
+ get_cpu_type(),
+ get_cpu_rev(),
+ mxc_get_clock(MXC_ARM_CLK) / 1000000);
+ printf("BOOT: %s\n", mxs_boot_modes[data->boot_mode_idx].mode);
+ return 0;
+}
+#endif
+
+int do_mx28_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ printf("CPU: %3d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
+ printf("BUS: %3d MHz\n", mxc_get_clock(MXC_AHB_CLK) / 1000000);
+ printf("EMI: %3d MHz\n", mxc_get_clock(MXC_EMI_CLK));
+ printf("GPMI: %3d MHz\n", mxc_get_clock(MXC_GPMI_CLK) / 1000000);
+ return 0;
+}
+
+/*
+ * Initializes on-chip ethernet controllers.
+ */
+#if defined(CONFIG_MX28) && defined(CONFIG_CMD_NET)
+int cpu_eth_init(bd_t *bis)
+{
+ struct mxs_clkctrl_regs *clkctrl_regs =
+ (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+
+ /* Turn on ENET clocks */
+ clrbits_le32(&clkctrl_regs->hw_clkctrl_enet,
+ CLKCTRL_ENET_SLEEP | CLKCTRL_ENET_DISABLE);
+
+ /* Set up ENET PLL for 50 MHz */
+ /* Power on ENET PLL */
+ writel(CLKCTRL_PLL2CTRL0_POWER,
+ &clkctrl_regs->hw_clkctrl_pll2ctrl0_set);
+
+ udelay(10);
+
+ /* Gate on ENET PLL */
+ writel(CLKCTRL_PLL2CTRL0_CLKGATE,
+ &clkctrl_regs->hw_clkctrl_pll2ctrl0_clr);
+
+ /* Enable pad output */
+ setbits_le32(&clkctrl_regs->hw_clkctrl_enet, CLKCTRL_ENET_CLK_OUT_EN);
+
+ return 0;
+}
+#endif
+
+__weak void mx28_adjust_mac(int dev_id, unsigned char *mac)
+{
+ mac[0] = 0x00;
+ mac[1] = 0x04; /* Use FSL vendor MAC address by default */
+
+ if (dev_id == 1) /* Let MAC1 be MAC0 + 1 by default */
+ mac[5] += 1;
+}
+
+#ifdef CONFIG_MX28_FEC_MAC_IN_OCOTP
+
+#define MXS_OCOTP_MAX_TIMEOUT 1000000
+void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
+{
+ struct mxs_ocotp_regs *ocotp_regs =
+ (struct mxs_ocotp_regs *)MXS_OCOTP_BASE;
+ uint32_t data;
+
+ memset(mac, 0, 6);
+
+ writel(OCOTP_CTRL_RD_BANK_OPEN, &ocotp_regs->hw_ocotp_ctrl_set);
+
+ if (mxs_wait_mask_clr(&ocotp_regs->hw_ocotp_ctrl_reg, OCOTP_CTRL_BUSY,
+ MXS_OCOTP_MAX_TIMEOUT)) {
+ printf("MXS FEC: Can't get MAC from OCOTP\n");
+ return;
+ }
+
+ data = readl(&ocotp_regs->hw_ocotp_cust0);
+
+ mac[2] = (data >> 24) & 0xff;
+ mac[3] = (data >> 16) & 0xff;
+ mac[4] = (data >> 8) & 0xff;
+ mac[5] = data & 0xff;
+ mx28_adjust_mac(dev_id, mac);
+}
+#else
+void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
+{
+ memset(mac, 0, 6);
+}
+#endif
+
+int mxs_dram_init(void)
+{
+ struct mxs_spl_data *data = (struct mxs_spl_data *)
+ ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
+
+ if (data->mem_dram_size == 0) {
+ printf("MXS:\n"
+ "Error, the RAM size passed up from SPL is 0!\n");
+ hang();
+ }
+
+ gd->ram_size = data->mem_dram_size;
+ return 0;
+}
+
+U_BOOT_CMD(
+ clocks, CONFIG_SYS_MAXARGS, 1, do_mx28_showclocks,
+ "display clocks",
+ ""
+);
Code Review / kvmfornfv.git / blobdiff