* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
- * 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 <config.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/compiler.h>
#include "mxs_init.h"
0x00000000, 0x00000000, 0x00010101, 0x01010101,
0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101,
0x00000100, 0x00000100, 0x00000000, 0x00000002,
- 0x01010000, 0x05060302, 0x06005003, 0x0a0000c8,
- 0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612,
+ 0x01010000, 0x07080403, 0x06005003, 0x0a0000c8,
+ 0x02009c40, 0x0002030c, 0x0036a609, 0x031a0612,
0x02030202, 0x00c8001c, 0x00000000, 0x00000000,
0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
0x00000003, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000612, 0x01000F02,
- 0x06120612, 0x00000200, 0x00020007, 0xf5014b27,
- 0xf5014b27, 0xf5014b27, 0xf5014b27, 0x07000300,
- 0x07000300, 0x07000300, 0x07000300, 0x00000006,
+ 0x06120612, 0x00000200, 0x00020007, 0xf4004a27,
+ 0xf4004a27, 0xf4004a27, 0xf4004a27, 0x07000300,
+ 0x07000300, 0x07400300, 0x07400300, 0x00000005,
0x00000000, 0x00000000, 0x01000000, 0x01020408,
0x08040201, 0x000f1133, 0x00000000, 0x00001f04,
0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00000000, 0x00010000, 0x00020304,
- 0x00000004, 0x00000000, 0x00000000, 0x00000000,
+ 0x00000000, 0x00000000, 0x00010000, 0x00030404,
+ 0x00000003, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0x01010000,
0x01000000, 0x03030000, 0x00010303, 0x01020202,
0x00000000, 0x02040303, 0x21002103, 0x00061200,
- 0x06120612, 0x04320432, 0x04320432, 0x00040004,
+ 0x06120612, 0x04420442, 0x04420442, 0x00040004,
0x00040004, 0x00000000, 0x00000000, 0x00000000,
- 0x00000000, 0x00010001
+ 0x00000000, 0xffffffff
+
+/*
+ * i.MX23 DDR at 133MHz
+ */
+#elif defined(CONFIG_MX23)
+ 0x01010001, 0x00010100, 0x01000101, 0x00000001,
+ 0x00000101, 0x00000000, 0x00010000, 0x01000001,
+ 0x00000000, 0x00000001, 0x07000200, 0x00070202,
+ 0x02020000, 0x04040a01, 0x00000201, 0x02040000,
+ 0x02000000, 0x19000f08, 0x0d0d0000, 0x02021313,
+ 0x02061521, 0x0000000a, 0x00080008, 0x00200020,
+ 0x00200020, 0x00200020, 0x000003f7, 0x00000000,
+ 0x00000000, 0x00000020, 0x00000020, 0x00c80000,
+ 0x000a23cd, 0x000000c8, 0x00006665, 0x00000000,
+ 0x00000101, 0x00040001, 0x00000000, 0x00000000,
+ 0x00010000
#else
#error Unsupported memory initialization
#endif
};
-void __mxs_adjust_memory_params(uint32_t *dram_vals)
+__weak void mxs_adjust_memory_params(uint32_t *dram_vals)
{
}
-void mxs_adjust_memory_params(uint32_t *dram_vals)
- __attribute__((weak, alias("__mxs_adjust_memory_params")));
+#ifdef CONFIG_MX28
static void initialize_dram_values(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(dram_vals); i++)
writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
}
+#else
+static void initialize_dram_values(void)
+{
+ int i;
+
+ mxs_adjust_memory_params(dram_vals);
+
+ /*
+ * HW_DRAM_CTL27, HW_DRAM_CTL28 and HW_DRAM_CTL35 are not initialized as
+ * per FSL bootlets code.
+ *
+ * mx23 Reference Manual marks HW_DRAM_CTL27 and HW_DRAM_CTL28 as
+ * "reserved".
+ * HW_DRAM_CTL8 is setup as the last element.
+ * So skip the initialization of these HW_DRAM_CTL registers.
+ */
+ for (i = 0; i < ARRAY_SIZE(dram_vals); i++) {
+ if (i == 8 || i == 27 || i == 28 || i == 35)
+ continue;
+ writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
+ }
+
+ /*
+ * Enable tRAS lockout in HW_DRAM_CTL08 ; it must be the last
+ * element to be set
+ */
+ writel((1 << 24), MXS_DRAM_BASE + (4 * 8));
+}
+#endif
static void mxs_mem_init_clock(void)
{
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
+#if defined(CONFIG_MX23)
+ /* Fractional divider for ref_emi is 33 ; 480 * 18 / 33 = 266MHz */
+ const unsigned char divider = 33;
+#elif defined(CONFIG_MX28)
+ /* Fractional divider for ref_emi is 21 ; 480 * 18 / 21 = 411MHz */
+ const unsigned char divider = 21;
+#endif
/* Gate EMI clock */
writeb(CLKCTRL_FRAC_CLKGATE,
&clkctrl_regs->hw_clkctrl_frac0_set[CLKCTRL_FRAC0_EMI]);
- /* Set fractional divider for ref_emi to 480 * 18 / 21 = 411MHz */
- writeb(CLKCTRL_FRAC_CLKGATE | (21 & CLKCTRL_FRAC_FRAC_MASK),
+ /* Set fractional divider for ref_emi */
+ writeb(CLKCTRL_FRAC_CLKGATE | (divider & CLKCTRL_FRAC_FRAC_MASK),
&clkctrl_regs->hw_clkctrl_frac0[CLKCTRL_FRAC0_EMI]);
/* Ungate EMI clock */
&clkctrl_regs->hw_clkctrl_clkseq_clr);
}
-static void __attribute__((naked)) data_abort_memdetect_handler(void)
+void data_abort_memdetect_handler(void)
{
- asm volatile("subs pc, r14, #4");
+ asm volatile("subs pc, lr, #4");
}
uint32_t mxs_mem_get_size(void)
{
uint32_t sz, da;
uint32_t *vt = (uint32_t *)0x20;
+ unsigned long cr;
+
+ /* move vector table to low memory */
+ asm volatile(
+ "mrc p15, 0, %0, c1, c0, 0\n"
+ "bic r7, %0, #(1 << 13)\n"
+ "mcr p15, 0, r7, c1, c0, 0\n"
+ : "=r"(cr) : : "r7");
/* Replace the DABT handler. */
da = vt[4];
/* Restore the old DABT handler. */
vt[4] = da;
+ asm volatile("mcr p15, 0, %0, c1, c0, 0\n" : : "r"(cr));
return sz;
}
-void mxs_mem_init(void)
+#ifdef CONFIG_MX23
+static void mx23_mem_setup_vddmem(void)
+{
+ struct mxs_power_regs *power_regs =
+ (struct mxs_power_regs *)MXS_POWER_BASE;
+
+ clrbits_le32(&power_regs->hw_power_vddmemctrl,
+ POWER_VDDMEMCTRL_ENABLE_ILIMIT);
+
+}
+
+static void mx23_mem_init(void)
+{
+ /*
+ * Reset/ungate the EMI block. This is essential, otherwise the system
+ * suffers from memory instability. This thing is mx23 specific and is
+ * no longer present on mx28.
+ */
+ mxs_reset_block((struct mxs_register_32 *)MXS_EMI_BASE);
+
+ mx23_mem_setup_vddmem();
+
+ /*
+ * Configure the DRAM registers
+ */
+
+ /* Clear START and SREFRESH bit from DRAM_CTL8 */
+ clrbits_le32(MXS_DRAM_BASE + 0x20, (1 << 16) | (1 << 8));
+
+ initialize_dram_values();
+
+ /* Set START bit in DRAM_CTL8 */
+ setbits_le32(MXS_DRAM_BASE + 0x20, 1 << 16);
+
+ clrbits_le32(MXS_DRAM_BASE + 0x40, 1 << 17);
+ early_delay(20000);
+
+ /* Adjust EMI port priority. */
+ clrsetbits_le32(0x80020000, 0x1f << 16, 0x2);
+ early_delay(20000);
+
+ setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 19);
+ setbits_le32(MXS_DRAM_BASE + 0x40, 1 << 11);
+}
+#endif
+
+#ifdef CONFIG_MX28
+static void mx28_mem_init(void)
{
- struct mxs_clkctrl_regs *clkctrl_regs =
- (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
struct mxs_pinctrl_regs *pinctrl_regs =
(struct mxs_pinctrl_regs *)MXS_PINCTRL_BASE;
writel(PINCTRL_EMI_DS_CTRL_DDR_MODE_DDR2,
&pinctrl_regs->hw_pinctrl_emi_ds_ctrl_set);
- /* Power up PLL0 */
- writel(CLKCTRL_PLL0CTRL0_POWER,
- &clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
-
- /* enabling the PLL requires a 10µs delay before use as clk source */
- early_delay(11);
-
- mxs_mem_init_clock();
-
/*
* Configure the DRAM registers
*/
/* Wait for bit 20 (DRAM init complete) in DRAM_CTL58 */
while (!(readl(MXS_DRAM_BASE + 0xe8) & (1 << 20)))
;
+}
+#endif
+
+void mxs_mem_init(void)
+{
+ early_delay(11000);
+
+ mxs_mem_init_clock();
+
+#if defined(CONFIG_MX23)
+ mx23_mem_init();
+#elif defined(CONFIG_MX28)
+ mx28_mem_init();
+#endif
mxs_mem_setup_cpu_and_hbus();
}
projects / karo-tx-uboot.git / blobdiff