Merge tag 'u-boot-atmel-fixes-2020.07-a' of https://gitlab.denx.de/u-boot/custodians...

[oweals/u-boot.git] / arch / arm / cpu / arm926ejs / mxs / mxs.c

diff --git a/arch/arm/cpu/arm926ejs/mxs/mxs.c b/arch/arm/cpu/arm926ejs/mxs/mxs.c
index 365542fe0bb29e1a7c2cc4ff4d35c83adb41d37b..12ebc1c8029f68653ecf2685d0c64c8d75ace8ac 100644 (file)
--- a/arch/arm/cpu/arm926ejs/mxs/mxs.c
+++ b/arch/arm/cpu/arm926ejs/mxs/mxs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale i.MX23/i.MX28 common code
  *
@@ -6,15 +7,19 @@
  *
  * 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 <command.h>
+#include <cpu_func.h>
+#include <hang.h>
+#include <init.h>
+#include <net.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>
-#include <asm/imx-common/dma.h>
+#include <asm/mach-imx/dma.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/imx-regs.h>
@@ -24,7 +29,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 /* Lowlevel init isn't used on i.MX28, so just have a dummy here */
-inline void lowlevel_init(void) {}
+__weak void lowlevel_init(void) {}
 
 void reset_cpu(ulong ignored) __attribute__((noreturn));
 
@@ -50,16 +55,6 @@ void reset_cpu(ulong ignored)
                ;
 }
 
-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.
@@ -83,7 +78,9 @@ void mx28_fixup_vt(uint32_t start_addr)
        int i;
 
        for (i = 0; i < 8; i++) {
+               /* cppcheck-suppress nullPointer */
                vt[i] = ldr_pc;
+               /* cppcheck-suppress nullPointer */
                vt[i + 8] = start_addr + (4 * i);
        }
 }
@@ -107,13 +104,16 @@ int arch_cpu_init(void)
        /*
         * Enable NAND clock
         */
-       /* Clear bypass bit */
+       /* Set bypass bit */
        writel(CLKCTRL_CLKSEQ_BYPASS_GPMI,
                &clkctrl_regs->hw_clkctrl_clkseq_set);
 
-       /* Set GPMI clock to ref_gpmi / 12 */
+       /* Set GPMI clock to ref_xtal / 1 */
+       clrbits_le32(&clkctrl_regs->hw_clkctrl_gpmi, CLKCTRL_GPMI_CLKGATE);
+       while (readl(&clkctrl_regs->hw_clkctrl_gpmi) & CLKCTRL_GPMI_CLKGATE)
+               ;
        clrsetbits_le32(&clkctrl_regs->hw_clkctrl_gpmi,
-               CLKCTRL_GPMI_CLKGATE | CLKCTRL_GPMI_DIV_MASK, 1);
+               CLKCTRL_GPMI_DIV_MASK, 1);
 
        udelay(1000);
 
@@ -130,23 +130,7 @@ int arch_cpu_init(void)
        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)
+u32 get_cpu_rev(void)
 {
        struct mxs_digctl_regs *digctl_regs =
                (struct mxs_digctl_regs *)MXS_DIGCTL_BASE;
@@ -156,25 +140,34 @@ static const char *get_cpu_rev(void)
        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";
+                       return (MXC_CPU_MX23 << 12) | (rev + 0x10);
                default:
-                       return "??";
+                       return 0;
                }
        case HW_DIGCTL_CHIPID_MX28:
                switch (rev) {
                case 0x1:
-                       return "1.2";
+                       return (MXC_CPU_MX28 << 12) | 0x12;
                default:
-                       return "??";
+                       return 0;
                }
+       default:
+               return 0;
+       }
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
+const char *get_imx_type(u32 imxtype)
+{
+       switch (imxtype) {
+       case MXC_CPU_MX23:
+               return "23";
+       case MXC_CPU_MX28:
+               return "28";
        default:
                return "??";
        }
@@ -182,19 +175,22 @@ static const char *get_cpu_rev(void)
 
 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(),
+       u32 cpurev;
+       struct mxs_spl_data *data = MXS_SPL_DATA;
+
+       cpurev = get_cpu_rev();
+       printf("CPU:   Freescale i.MX%s rev%d.%d at %d MHz\n",
+               get_imx_type((cpurev & 0xFF000) >> 12),
+               (cpurev & 0x000F0) >> 4,
+               (cpurev & 0x0000F) >> 0,
                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[])
+int do_mx28_showclocks(struct cmd_tbl *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);
@@ -279,8 +275,7 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
 
 int mxs_dram_init(void)
 {
-       struct mxs_spl_data *data = (struct mxs_spl_data *)
-               ((CONFIG_SYS_TEXT_BASE - sizeof(struct mxs_spl_data)) & ~0xf);
+       struct mxs_spl_data *data = MXS_SPL_DATA;
 
        if (data->mem_dram_size == 0) {
                printf("MXS:\n"