diff options
Diffstat (limited to 'recipes/u-boot/u-boot-mkimage-openmoko-native/uboot-cmd_s3c2410.patch')
| -rw-r--r-- | recipes/u-boot/u-boot-mkimage-openmoko-native/uboot-cmd_s3c2410.patch | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/recipes/u-boot/u-boot-mkimage-openmoko-native/uboot-cmd_s3c2410.patch b/recipes/u-boot/u-boot-mkimage-openmoko-native/uboot-cmd_s3c2410.patch new file mode 100644 index 0000000000..4e63908c67 --- /dev/null +++ b/recipes/u-boot/u-boot-mkimage-openmoko-native/uboot-cmd_s3c2410.patch @@ -0,0 +1,175 @@ +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@openmoko.org> + +Index: u-boot/cpu/arm920t/s3c24x0/Makefile +=================================================================== +--- u-boot.orig/cpu/arm920t/s3c24x0/Makefile 2007-02-24 15:14:00.000000000 +0100 ++++ u-boot/cpu/arm920t/s3c24x0/Makefile 2007-02-24 15:21:02.000000000 +0100 +@@ -26,7 +26,7 @@ + LIB = $(obj)lib$(SOC).a + + COBJS = i2c.o interrupts.o serial.o speed.o \ +- usb_ohci.o nand_read.o nand.o ++ usb_ohci.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 2007-02-24 15:22:17.000000000 +0100 +@@ -0,0 +1,152 @@ ++/* ++ * (C) Copyright 2006 by Openmoko, Inc. ++ * Author: Harald Welte <laforge@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->UPLLCON = ((0x78 << 12) + (0x2 << 4) + 0x3), ++ 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 |