r990 - trunk/src/target/u-boot/patches
laforge at sita.openmoko.org
laforge at sita.openmoko.org
Thu Feb 15 02:36:15 CET 2007
Author: laforge
Date: 2007-02-15 02:36:15 +0100 (Thu, 15 Feb 2007)
New Revision: 990
Added:
trunk/src/target/u-boot/patches/uboot-cmd_s3c2410.patch
Modified:
trunk/src/target/u-boot/patches/series
Log:
commit clock speed change patch
Modified: trunk/src/target/u-boot/patches/series
===================================================================
--- trunk/src/target/u-boot/patches/series 2007-02-14 23:10:45 UTC (rev 989)
+++ trunk/src/target/u-boot/patches/series 2007-02-15 01:36:15 UTC (rev 990)
@@ -19,6 +19,7 @@
uboot-s3c2410_udc.patch
uboot-gta01bv3.patch
uboot-neo1973-poweroff.patch
+uboot-cmd_s3c2410.patch
bbt-create-optional.patch
nand-createbbt.patch
uboot-mokoversion.patch
Added: trunk/src/target/u-boot/patches/uboot-cmd_s3c2410.patch
===================================================================
--- trunk/src/target/u-boot/patches/uboot-cmd_s3c2410.patch 2007-02-14 23:10:45 UTC (rev 989)
+++ trunk/src/target/u-boot/patches/uboot-cmd_s3c2410.patch 2007-02-15 01:36:15 UTC (rev 990)
@@ -0,0 +1,174 @@
+This patch adds a new 's3c2410' command which currently supports 's3c2410 speed
+{set,get,list} and thus allows dynamic change of the CPU clock.
+
+Signed-off-by: Harald Welte <laforge at openmoko.org>
+
+Index: u-boot/cpu/arm920t/s3c24x0/Makefile
+===================================================================
+--- u-boot.orig/cpu/arm920t/s3c24x0/Makefile 2007-02-15 02:26:31.000000000 +0100
++++ u-boot/cpu/arm920t/s3c24x0/Makefile 2007-02-15 02:28:27.000000000 +0100
+@@ -26,7 +26,7 @@
+ LIB = $(obj)lib$(SOC).a
+
+ COBJS = i2c.o interrupts.o serial.o speed.o \
+- usb_ohci.o mmc.o nand_read.o nand.o
++ usb_ohci.o mmc.o nand_read.o nand.o cmd_s3c2410.o
+
+ SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+ OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
+Index: u-boot/cpu/arm920t/s3c24x0/cmd_s3c2410.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ u-boot/cpu/arm920t/s3c24x0/cmd_s3c2410.c 2007-02-15 02:34:23.000000000 +0100
+@@ -0,0 +1,151 @@
++/*
++ * (C) Copyright 2006 by OpenMoko, Inc.
++ * Author: Harald Welte <laforge at openmoko.org>
++ *
++ * 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
++ */
++
++/*
++ * Boot support
++ */
++#include <common.h>
++#include <command.h>
++#include <net.h> /* for print_IPaddr */
++#include <s3c2410.h>
++
++DECLARE_GLOBAL_DATA_PTR;
++
++#if (CONFIG_COMMANDS & CFG_CMD_BDI)
++
++#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
++#define MHZ 1000000
++
++static void print_cpu_speed(void)
++{
++ printf("FCLK = %u MHz, HCLK = %u MHz, PCLK = %u MHz\n",
++ get_FCLK()/MHZ, get_HCLK()/MHZ, get_PCLK()/MHZ);
++}
++
++struct s3c2410_pll_speed {
++ u_int16_t mhz;
++ u_int32_t mpllcon;
++ u_int32_t clkdivn;
++};
++
++#define CLKDIVN_1_1_1 0x00
++#define CLKDIVN_1_2_2 0x02
++#define CLKDIVN_1_2_4 0x03
++#define CLKDIVN_1_4_4 0x04
++
++static const struct s3c2410_pll_speed pll_configs[] = {
++ {
++ .mhz = 50,
++ .mpllcon = ((0x5c << 12) + (0x4 << 4) + 0x2),
++ .clkdivn = CLKDIVN_1_1_1,
++ },
++ {
++ .mhz = 101,
++ .mpllcon = ((0x7f << 12) + (0x2 << 4) + 0x2),
++ .clkdivn = CLKDIVN_1_2_2,
++ },
++ {
++ .mhz = 202,
++ .mpllcon = ((0x90 << 12) + (0x7 << 4) + 0x0),
++ .clkdivn = CLKDIVN_1_2_4,
++ },
++ {
++ .mhz = 266,
++ .mpllcon = ((0x7d << 12) + (0x1 << 4) + 0x1),
++ .clkdivn = CLKDIVN_1_2_4,
++ },
++};
++
++static void list_cpu_speeds(void)
++{
++ int i;
++ for (i = 0; i < ARRAY_SIZE(pll_configs); i++)
++ printf("%u MHz\n", pll_configs[i].mhz);
++}
++
++static int reconfig_mpll(u_int16_t mhz)
++{
++ S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
++ int i;
++
++ for (i = 0; i < ARRAY_SIZE(pll_configs); i++) {
++ if (pll_configs[i].mhz == mhz) {
++ /* to reduce PLL lock time, adjust the LOCKTIME register */
++ clk_power->LOCKTIME = 0xFFFFFF;
++
++ /* configure MPLL */
++ clk_power->MPLLCON = pll_configs[i].mpllcon;
++ clk_power->CLKDIVN = pll_configs[i].clkdivn;
++
++ /* If we changed the speed, we need to re-configure
++ * the serial baud rate generator */
++ serial_setbrg();
++ return 0;
++ }
++ }
++ return -1;
++}
++
++int do_s3c2410 ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
++{
++ if (!strcmp(argv[1], "speed")) {
++ if (argc < 2)
++ goto out_help;
++ if (!strcmp(argv[2], "get"))
++ print_cpu_speed();
++ else if (!strcmp(argv[2], "list"))
++ list_cpu_speeds();
++ else if (!strcmp(argv[2], "set")) {
++ unsigned long mhz;
++ if (argc < 3)
++ goto out_help;
++
++ mhz = simple_strtoul(argv[3], NULL, 10);
++
++ if (reconfig_mpll(mhz) < 0)
++ printf("error, speed %uMHz unknown\n", mhz);
++ else
++ print_cpu_speed();
++ } else
++ goto out_help;
++ } else {
++out_help:
++ printf("Usage:\n%s\n", cmdtp->usage);
++ return 1;
++ }
++
++ return 0;
++}
++
++/* -------------------------------------------------------------------- */
++
++
++U_BOOT_CMD(
++ s3c2410, 4, 1, do_s3c2410,
++ "s3c2410 - SoC specific commands\n",
++ "speed get - display current PLL speed config\n"
++ "s3c2410 speed list - display supporte PLL speed configs\n"
++ "s3c2410 speed set - set PLL speed\n"
++);
++
++#endif
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