* Based on code from LTIB:
* Copyright (C) 2010 Freescale Semiconductor, Inc.
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
-#include <asm/arch/dma.h>
+#include <asm/imx-common/dma.h>
#include <asm/arch/gpio.h>
#include <asm/arch/iomux.h>
#include <asm/arch/imx-regs.h>
DECLARE_GLOBAL_DATA_PTR;
-/* 1 second delay should be plenty of time for block reset. */
-#define RESET_MAX_TIMEOUT 1000000
-
-#define MXS_BLOCK_SFTRST (1 << 31)
-#define MXS_BLOCK_CLKGATE (1 << 30)
-
/* Lowlevel init isn't used on i.MX28, so just have a dummy here */
-inline void lowlevel_init(void) {}
+void lowlevel_init(void) {}
void reset_cpu(ulong ignored) __attribute__((noreturn));
#endif
}
-int mxs_wait_mask_set(struct mxs_register_32 *reg, uint32_t mask, unsigned
- int timeout)
-{
- while (--timeout) {
- if ((readl(®->reg) & mask) == mask)
- break;
- udelay(1);
- }
-
- return !timeout;
-}
-
-int mxs_wait_mask_clr(struct mxs_register_32 *reg, uint32_t mask, unsigned
- int timeout)
-{
- while (--timeout) {
- if ((readl(®->reg) & mask) == 0)
- break;
- udelay(1);
- }
-
- return !timeout;
-}
-
-int mxs_reset_block(struct mxs_register_32 *reg)
-{
- /* Clear SFTRST */
- writel(MXS_BLOCK_SFTRST, ®->reg_clr);
-
- if (mxs_wait_mask_clr(reg, MXS_BLOCK_SFTRST, RESET_MAX_TIMEOUT))
- return 1;
-
- /* Clear CLKGATE */
- writel(MXS_BLOCK_CLKGATE, ®->reg_clr);
-
- /* Set SFTRST */
- writel(MXS_BLOCK_SFTRST, ®->reg_set);
-
- /* Wait for CLKGATE being set */
- if (mxs_wait_mask_set(reg, MXS_BLOCK_CLKGATE, RESET_MAX_TIMEOUT))
- return 1;
-
- /* Clear SFTRST */
- writel(MXS_BLOCK_SFTRST, ®->reg_clr);
-
- if (mxs_wait_mask_clr(reg, MXS_BLOCK_SFTRST, RESET_MAX_TIMEOUT))
- return 1;
-
- /* Clear CLKGATE */
- writel(MXS_BLOCK_CLKGATE, ®->reg_clr);
-
- if (mxs_wait_mask_clr(reg, MXS_BLOCK_CLKGATE, RESET_MAX_TIMEOUT))
- return 1;
-
- return 0;
-}
-
+/*
+ * 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)
{
- uint32_t *vt = (uint32_t *)0x20;
+ /* 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] = start_addr + (4 * i);
+ for (i = 0; i < 8; i++) {
+ /* cppcheck-suppress nullPointer */
+ vt[i] = ldr_pc;
+ /* cppcheck-suppress nullPointer */
+ vt[i + 8] = start_addr + (4 * i);
+ }
}
#ifdef CONFIG_ARCH_MISC_INIT
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;
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"; /* Quad-Plus version of the mx6 */
+ case MXC_CPU_MX28:
+ return "28"; /* Dual-Plus version of the mx6 */
default:
return "??";
}
int print_cpuinfo(void)
{
+ u32 cpurev;
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(),
+ 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;
projects / u-boot / blobdiff