From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UKPvF-0003A8-NE for barebox@lists.infradead.org; Tue, 26 Mar 2013 09:12:05 +0000 From: Steffen Trumtrar Date: Tue, 26 Mar 2013 10:11:26 +0100 Message-Id: <1364289086-2241-6-git-send-email-s.trumtrar@pengutronix.de> In-Reply-To: <1364289086-2241-1-git-send-email-s.trumtrar@pengutronix.de> References: <1364289086-2241-1-git-send-email-s.trumtrar@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v3 5/5] ARM: zynq: Add support for the Avnet Zedboard To: barebox@lists.infradead.org Cc: Steffen Trumtrar The Avnet ZedBoard is an evalboard with a Zynq-7020 based MPSoC. There is also a Digilent ZedBoard, that is the same but only for academic customers. Signed-off-by: Steffen Trumtrar --- Changes since v2: - use pbl image - remove useless flash_header_start arch/arm/boards/avnet-zedboard/Makefile | 3 + arch/arm/boards/avnet-zedboard/board.c | 38 ++++ arch/arm/boards/avnet-zedboard/config.h | 4 + .../boards/avnet-zedboard/env/init/config-board | 7 + arch/arm/boards/avnet-zedboard/flash_header.c | 62 +++++ arch/arm/boards/avnet-zedboard/lowlevel.c | 252 +++++++++++++++++++++ arch/arm/configs/zedboard_defconfig | 49 ++++ 7 files changed, 415 insertions(+) create mode 100644 arch/arm/boards/avnet-zedboard/Makefile create mode 100644 arch/arm/boards/avnet-zedboard/board.c create mode 100644 arch/arm/boards/avnet-zedboard/config.h create mode 100644 arch/arm/boards/avnet-zedboard/env/init/config-board create mode 100644 arch/arm/boards/avnet-zedboard/flash_header.c create mode 100644 arch/arm/boards/avnet-zedboard/lowlevel.c create mode 100644 arch/arm/configs/zedboard_defconfig diff --git a/arch/arm/boards/avnet-zedboard/Makefile b/arch/arm/boards/avnet-zedboard/Makefile new file mode 100644 index 0000000..a2c3104 --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/Makefile @@ -0,0 +1,3 @@ +obj-y += board.o +lwl-y += lowlevel.o +lwl-y += flash_header.o diff --git a/arch/arm/boards/avnet-zedboard/board.c b/arch/arm/boards/avnet-zedboard/board.c new file mode 100644 index 0000000..4e3d5a5 --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/board.c @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2013 Steffen Trumtrar + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static int zedboard_mem_init(void) +{ + arm_add_mem_device("ram0", 0, SZ_512M); + + return 0; +} +mem_initcall(zedboard_mem_init); + +static int zedboard_console_init(void) +{ + zynq_add_uart1(); + + return 0; +} +console_initcall(zedboard_console_init); diff --git a/arch/arm/boards/avnet-zedboard/config.h b/arch/arm/boards/avnet-zedboard/config.h new file mode 100644 index 0000000..ca15136 --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/config.h @@ -0,0 +1,4 @@ +#ifndef __CONFIG_H +#define __CONFIG_H + +#endif /* __CONFIG_H */ diff --git a/arch/arm/boards/avnet-zedboard/env/init/config-board b/arch/arm/boards/avnet-zedboard/env/init/config-board new file mode 100644 index 0000000..9957653 --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/env/init/config-board @@ -0,0 +1,7 @@ +#!/bin/sh + +# board defaults, do not change in running system. Change /env/config +# instead + +global.hostname=ZedBoard +global.linux.bootargs.base="console=ttyPS1,115200" diff --git a/arch/arm/boards/avnet-zedboard/flash_header.c b/arch/arm/boards/avnet-zedboard/flash_header.c new file mode 100644 index 0000000..ea20524 --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/flash_header.c @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2012 Steffen Trumtrar + * + * 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. + * + */ + +#include +#include +#include +#include +#include + +#define REG(a, v) { .addr = cpu_to_le32(a), .val = cpu_to_le32(v), } + +struct zynq_reg_entry __ps7reg_entry_section reg_entry[] = { + REG(ZYNQ_SLCR_UNLOCK, 0x0000DF0D), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_CLK_621_TRUE, 0x00000001), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_APER_CLK_CTRL, 0x01FC044D), + + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL, 0x00028008), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CFG, 0x000FA220), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL, 0x00028010), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL, 0x00028011), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL, 0x00028010), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL, 0x00028000), + + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL, 0x0001E008), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CFG, 0x001452C0), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL, 0x0001E010), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL, 0x0001E011), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL, 0x0001E010), + REG(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL, 0x0001E000), + + REG(0xf8000150, 0x00000a03), + + /* stop */ + REG(0xFFFFFFFF, 0x00000000), +}; + +struct zynq_flash_header __flash_header_section flash_header = { + .width_det = WIDTH_DETECTION_MAGIC, + .image_id = IMAGE_IDENTIFICATION, + .enc_stat = 0x0, + .user = 0x0, + .flash_offset = 0x8c0, + .length = barebox_image_size, + .res0 = 0x0, + .start_of_exec = 0x0, + .total_len = barebox_image_size, + .res1 = 0x1, + .checksum = 0x0, + .res2 = 0x0, +}; diff --git a/arch/arm/boards/avnet-zedboard/lowlevel.c b/arch/arm/boards/avnet-zedboard/lowlevel.c new file mode 100644 index 0000000..b50886e --- /dev/null +++ b/arch/arm/boards/avnet-zedboard/lowlevel.c @@ -0,0 +1,252 @@ +/* + * + * (c) 2013 Steffen Trumtrar + * + * 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. + * + */ +#include +#include +#include +#include +#include + +#define DCI_DONE (1 << 13) +#define PLL_ARM_LOCK (1 << 0) +#define PLL_DDR_LOCK (1 << 1) +#define PLL_IO_LOCK (1 << 2) + +void __naked barebox_arm_reset_vector(void) +{ + /* open sesame */ + writel(0x0000DF0D, ZYNQ_SLCR_UNLOCK); + + /* turn on LD9 */ + writel(0x00000200, 0xF800071C); + writel(0x00000080, 0xE000A204); + writel(0x00000080, 0xE000A000); + + /* ps7_clock_init_data */ + writel(0x1F000200, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_CLK_CTRL); + writel(0x00F00701, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DCI_CLK_CTRL); + writel(0x00002803, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_UART_CLK_CTRL); + writel(0x00000A03, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DBG_CLK_CTRL); + writel(0x00000501, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_PCAP_CLK_CTRL); + writel(0x00000000, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_TOPSW_CLK_CTRL); + writel(0x00100A00, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_FPGA0_CLK_CTRL); + writel(0x00100700, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_FPGA1_CLK_CTRL); + writel(0x00101400, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_FPGA2_CLK_CTRL); + writel(0x00101400, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_FPGA3_CLK_CTRL); + /* 6:2:1 mode */ + writel(0x00000001, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_CLK_621_TRUE); + writel(0x01FC044D, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_APER_CLK_CTRL); + + /* configure the PLLs */ + /* ARM PLL */ + writel(0x00028008, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL); + writel(0x000FA220, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CFG); + writel(0x00028010, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL); + writel(0x00028011, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL); + writel(0x00028010, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL); + + while (!(readl(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_PLL_STATUS) & PLL_ARM_LOCK)) + ; + writel(0x00028000, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_ARM_PLL_CTRL); + + /* DDR PLL */ + /* set to bypass mode */ + writel(0x0001A018, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CTRL); + /* assert reset */ + writel(0x0001A019, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CTRL); + /* set feedback divs */ + writel(0x00020019, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CTRL); + writel(0x0012C220, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CFG); + /* set ddr2xclk and ddr3xclk: 3,2 */ + writel(0x0C200003, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_CLK_CTRL); + /* deassert reset */ + writel(0x00020018, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CTRL); + /* wait pll lock */ + while (!(readl(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_PLL_STATUS) & PLL_DDR_LOCK)) + ; + /* remove bypass mode */ + writel(0x00020008, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_DDR_PLL_CTRL); + + /* IO PLL */ + writel(0x0001E008, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL); + writel(0x001452C0, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CFG); + writel(0x0001E010, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL); + writel(0x0001E011, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL); + writel(0x0001E010, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL); + + while (!(readl(ZYNQ_CLOCK_CTRL_BASE + ZYNQ_PLL_STATUS) & PLL_IO_LOCK)) + ; + writel(0x0001E000, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_IO_PLL_CTRL); + + /* + * INP_TYPE[1:2] = {off, vref, diff, lvcmos} + * DCI_UPDATE[3], TERM_EN[4] + * DCI_TYPE[5:6] = {off, drive, res, term} + * IBUF_DISABLE_MODE[7] = {ibuf, ibuf_disable} + * TERM_DISABLE_MODE[8] = {always, dynamic} + * OUTPUT_EN[9:10] = {ibuf, res, res, obuf} + * PULLUP_EN[11] + */ + writel(0x00000600, ZYNQ_DDRIOB_ADDR0); + writel(0x00000600, ZYNQ_DDRIOB_ADDR1); + writel(0x00000672, ZYNQ_DDRIOB_DATA0); + writel(0x00000672, ZYNQ_DDRIOB_DATA1); + writel(0x00000674, ZYNQ_DDRIOB_DIFF0); + writel(0x00000674, ZYNQ_DDRIOB_DIFF1); + writel(0x00000600, ZYNQ_DDRIOB_CLOCK); + /* + * Drive_P[0:6], Drive_N[7:13] + * Slew_P[14:18], Slew_N[19:23] + * GTL[24:26], RTerm[27:31] + */ + writel(0x00D6861C, ZYNQ_DDRIOB_DRIVE_SLEW_ADDR); + writel(0x00F9861C, ZYNQ_DDRIOB_DRIVE_SLEW_DATA); + writel(0x00F9861C, ZYNQ_DDRIOB_DRIVE_SLEW_DIFF); + writel(0x00D6861C, ZYNQ_DDRIOB_DRIVE_SLEW_CLOCK); + /* + * VREF_INT_EN[0] + * VREF_SEL[1:4] = {0001=0.6V, 0100=0.75V, 1000=0.9V} + * VREF_EXT_EN[5:6] = {dis/dis, dis/en, en/dis, en/en} + * RES[7:8], REFIO_EN[9] + */ + /* FIXME: Xilinx sets this to internal, but Zedboard should support + external VRef, too */ + writel(0x00000E09, ZYNQ_DDRIOB_DDR_CTRL); + /* + * RESET[0], ENABLE[1] + * NREF_OPT1[6:7], NREF_OPT2[8:10], NREF_OPT4[11:13] + * PREF_OPT1[14:15], PREF_OPT2[17:19], UPDATE_CONTROL[20] + */ + writel(0x00000021, ZYNQ_DDRIOB_DCI_CTRL); + writel(0x00000020, ZYNQ_DDRIOB_DCI_CTRL); + writel(0x00100823, ZYNQ_DDRIOB_DCI_CTRL); + + while (!(readl(ZYNQ_DDRIOB_DCI_STATUS) & DCI_DONE)) + ; + + writel(0x0E00E07F, 0xF8007000); + + /* ps7_ddr_init_data */ + writel(0x00000080, 0XF8006000); + writel(0x00081081, 0XF8006004); + writel(0x03C0780F, 0XF8006008); + writel(0x02001001, 0XF800600C); + writel(0x00014001, 0XF8006010); + writel(0x0004159B, 0XF8006014); + writel(0x452460D2, 0XF8006018); + writel(0x720238E5, 0XF800601C); + writel(0x272872D0, 0XF8006020); + writel(0x0000003C, 0XF8006024); + writel(0x00002007, 0XF8006028); + writel(0x00000008, 0XF800602C); + writel(0x00040930, 0XF8006030); + writel(0x00010694, 0XF8006034); + writel(0x00000000, 0XF8006038); + writel(0x00000777, 0XF800603C); + writel(0xFFF00000, 0XF8006040); + writel(0x0FF66666, 0XF8006044); + writel(0x0003C248, 0XF8006048); + writel(0x77010800, 0XF8006050); + writel(0x00000101, 0XF8006058); + writel(0x00005003, 0XF800605C); + writel(0x0000003E, 0XF8006060); + writel(0x00020000, 0XF8006064); + writel(0x00284141, 0XF8006068); + writel(0x00001610, 0XF800606C); + writel(0x00008000, 0XF80060A0); + writel(0x10200802, 0XF80060A4); + writel(0x0690CB73, 0XF80060A8); + writel(0x000001FE, 0XF80060AC); + writel(0x1CFFFFFF, 0XF80060B0); + writel(0x00000200, 0XF80060B4); + writel(0x00200066, 0XF80060B8); + writel(0x00000000, 0XF80060BC); + writel(0x00000000, 0XF80060C4); + writel(0x00000000, 0XF80060C8); + writel(0x00000000, 0XF80060DC); + writel(0x00000000, 0XF80060F0); + writel(0x00000008, 0XF80060F4); + writel(0x00000000, 0XF8006114); + writel(0x40000001, 0XF8006118); + writel(0x40000001, 0XF800611C); + writel(0x40000001, 0XF8006120); + writel(0x40000001, 0XF8006124); + writel(0x00033C03, 0XF800612C); + writel(0x00034003, 0XF8006130); + writel(0x0002F400, 0XF8006134); + writel(0x00030400, 0XF8006138); + writel(0x00000035, 0XF8006140); + writel(0x00000035, 0XF8006144); + writel(0x00000035, 0XF8006148); + writel(0x00000035, 0XF800614C); + writel(0x00000083, 0XF8006154); + writel(0x00000083, 0XF8006158); + writel(0x0000007F, 0XF800615C); + writel(0x00000078, 0XF8006160); + writel(0x00000124, 0XF8006168); + writel(0x00000125, 0XF800616C); + writel(0x00000112, 0XF8006170); + writel(0x00000116, 0XF8006174); + writel(0x000000C3, 0XF800617C); + writel(0x000000C3, 0XF8006180); + writel(0x000000BF, 0XF8006184); + writel(0x000000B8, 0XF8006188); + writel(0x10040080, 0XF8006190); + writel(0x0001FC82, 0XF8006194); + writel(0x00000000, 0XF8006204); + writel(0x000803FF, 0XF8006208); + writel(0x000803FF, 0XF800620C); + writel(0x000803FF, 0XF8006210); + writel(0x000803FF, 0XF8006214); + writel(0x000003FF, 0XF8006218); + writel(0x000003FF, 0XF800621C); + writel(0x000003FF, 0XF8006220); + writel(0x000003FF, 0XF8006224); + writel(0x00000000, 0XF80062A8); + writel(0x00000000, 0XF80062AC); + writel(0x00005125, 0XF80062B0); + writel(0x000012A8, 0XF80062B4); + writel(0x00000081, 0XF8006000); + + /* poor mans pinctrl */ + writel(0x000002E0, ZYNQ_MIO_BASE + 0xC0); + writel(0x000002E1, ZYNQ_MIO_BASE + 0xC4); + /* UART1 pinmux */ + writel(0x000002E1, ZYNQ_MIO_BASE + 0xC8); + writel(0x000002E0, ZYNQ_MIO_BASE + 0xCC); + + /* poor mans clkctrl */ + writel(0x00001403, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_UART_CLK_CTRL); + + writel(0x00000001, 0xf8000138); + writel(0x00100801, 0xf8000140); + writel(0x00000302, 0xf8000740); + writel(0x00000302, 0xf8000744); + writel(0x00000302, 0xf8000748); + writel(0x00000302, 0xf800074C); + writel(0x00000302, 0xf8000750); + writel(0x00000302, 0xf8000754); + + writel(0x00000001, 0xf8000B00); + + /* lock up. secure, secure */ + writel(0x0000767B, ZYNQ_SLCR_LOCK); + + arm_cpu_lowlevel_init(); + barebox_arm_entry(0, SZ_512M, 0); +} diff --git a/arch/arm/configs/zedboard_defconfig b/arch/arm/configs/zedboard_defconfig new file mode 100644 index 0000000..773177c --- /dev/null +++ b/arch/arm/configs/zedboard_defconfig @@ -0,0 +1,49 @@ +CONFIG_ARCH_ZYNQ=y +CONFIG_AEABI=y +CONFIG_CMD_ARM_MMUINFO=y +CONFIG_ARM_UNWIND=y +CONFIG_PBL_IMAGE=y +CONFIG_MMU=y +CONFIG_STACK_SIZE=0xf000 +CONFIG_MALLOC_SIZE=0x8000000 +CONFIG_MALLOC_TLSF=y +CONFIG_KALLSYMS=y +CONFIG_LONGHELP=y +CONFIG_HUSH_FANCY_PROMPT=y +CONFIG_CMDLINE_EDITING=y +CONFIG_AUTO_COMPLETE=y +CONFIG_MENU=y +CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y +CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/avnet-zedboard/env" +CONFIG_DEBUG_INFO=y +CONFIG_DEBUG_LL=y +CONFIG_CMD_EDIT=y +CONFIG_CMD_SLEEP=y +CONFIG_CMD_SAVEENV=y +CONFIG_CMD_EXPORT=y +CONFIG_CMD_PRINTENV=y +CONFIG_CMD_READLINE=y +CONFIG_CMD_MENU=y +CONFIG_CMD_MENU_MANAGEMENT=y +CONFIG_CMD_TIME=y +CONFIG_CMD_DIRNAME=y +CONFIG_CMD_LN=y +CONFIG_CMD_READLINK=y +CONFIG_CMD_MEMINFO=y +CONFIG_CMD_BOOTM_SHOW_TYPE=y +CONFIG_CMD_BOOTM_VERBOSE=y +CONFIG_CMD_BOOTM_INITRD=y +CONFIG_CMD_BOOTM_OFTREE=y +CONFIG_CMD_RESET=y +CONFIG_CMD_GO=y +CONFIG_CMD_OFTREE=y +CONFIG_CMD_OFTREE_PROBE=y +CONFIG_CMD_TIMEOUT=y +CONFIG_CMD_PARTITION=y +CONFIG_CMD_CLK=y +CONFIG_NET=y +CONFIG_NET_DHCP=y +# CONFIG_SPI is not set +CONFIG_FS_TFTP=y +CONFIG_DIGEST=y +CONFIG_MD5=y -- 1.8.2.rc2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox