imx6dl在eMMC启动方式启动时uboot阶段卡死该如何解决呢

359 emmc DRAM 寄存器

问答对人有帮助，内容完整，我也想知道答案 0 希望懂uboot的大神们进来看看，指教下我这个问题下面该如何调试。谢谢！ imx6dl在eMMC启动方式启动时uboot阶段卡死时串口输出信息如下： U-Boot 2009.08 ( 4月 23 2018 - 14:58:15) CPU: Freescale i.MX6 family TO1.3 at 792 MHz Temperature: 53 C, calibration data 0x5944f17d mx6q pll1: 792MHz mx6q pll2: 528MHz mx6q pll3: 480MHz mx6q pll8: 50MHz ipg clock : 66000000Hz ipg per clock : 66000000Hz uart clock : 80000000Hz cspi clock : 60000000Hz ahb clock : 132000000Hz axi clock : 198000000Hz emi_slow clock: 99000000Hz ddr clock : 396000000Hz usdhc1 clock : 198000000Hz usdhc2 clock : 198000000Hz usdhc3 clock : 198000000Hz usdhc4 clock : 198000000Hz NFC clock : 24000000Hz Board: i.MX6DL/Solo-SABRESD: unknown-board Board: 0x61013 [POR ] Boot Device: SD I2C: ready DRAM: 2 GB MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3 板子是自己做的板子，参考的是OKMX6X-S3（imx6dl）的开发板。 eMMC芯片型号是MT29F128G08，eMMC接在SDHC3上。 1、使用mfgtools工具已经将uboot和rootfs烧写成功了，但是在启动的时候卡在了上面输出； 2、经过自己在uboot中添加打印输出信息发现其卡在了eMMC模块处理部分，具体函数流程如下： mmc_startup-> init_part->test_part_dos->mmc_bread->mm_send_cmd->esdhc_send_cmd时在while (!(readl(®s->irqstat) & IRQSTAT_BRR))；处进入死循环；说明：eMMC的product已经读取到了，并且跟手册上的描述一致。 3、在while (!(readl(®s->irqstat) & IRQSTAT_BRR))；前打印输出SDHC3相关寄存器如下： CMD_SEND:17 ARG 0x00000000 FLAG 0 regs->dsaddr = 02198000, value=0x0 -----print_sdhc3_regs--165 regs->blkattr = 02198004, value=0x10200 -----print_sdhc3_regs--166 regs->prsstat = 02198024, value=0xff8d820e -----print_sdhc3_regs--167 regs->proctl = 02198028, value=0x8800024 -----print_sdhc3_regs--168 regs->sysctl = 0219802c, value=0x8e0018 -----print_sdhc3_regs--169 regs->irqstat = 02198030, value=0x0 -----print_sdhc3_regs--170 regs->irqstaten = 02198034, value=0x157f513f -----print_sdhc3_regs--171 regs->irqsigen = 02198038, value=0x0 -----print_sdhc3_regs--172 regs->autoc12err = 0219803c, value=0x0 -----print_sdhc3_regs--173 regs->hostcapblt = 02198040, value=0x7f30000 -----print_sdhc3_regs--174 regs->wml = 02198044, value=0x8000880 -----print_sdhc3_regs--175 regs->mixctrl = 02198048, value=0x18 -----print_sdhc3_regs--176 regs->dllctrl = 02198060, value=0x1000001 -----print_sdhc3_regs--177 regs->dllstatus = 02198064, value=0x3a07 -----print_sdhc3_regs--178 regs->clktunectrlstatus = 02198068, value=0x0 -----print_sdhc3_regs--179 regs->vendorspec = 021980c0, value=0x20007809 -----print_sdhc3_regs--180 regs->mmcboot = 021980c4, value=0x0 -----print_sdhc3_regs--181 regs->hostver = 021980fc, value=0x103 -----print_sdhc3_regs--182 开发板在此处寄存器的值如下： regs->dsaddr = 0219c000, value=0x0 -----print_sdhc3_regs--165 regs->blkattr = 0219c004, value=0x10200 -----print_sdhc3_regs--166 regs->prsstat = 0219c024, value=0xff8d8a8a -----print_sdhc3_regs--167 regs->proctl = 0219c028, value=0x8800024 -----print_sdhc3_regs--168 regs->sysctl = 0219c02c, value=0x8e0018 -----print_sdhc3_regs--169 regs->irqstat = 0219c030, value=0x20 -----print_sdhc3_regs--170 regs->irqstaten = 0219c034, value=0x157f513f -----print_sdhc3_regs--171 regs->irqsigen = 0219c038, value=0x0 -----print_sdhc3_regs--172 regs->autoc12err = 0219c03c, value=0x0 -----print_sdhc3_regs--173 regs->hostcapblt = 0219c040, value=0x7f30000 -----print_sdhc3_regs--174 regs->wml = 0219c044, value=0x8000880 -----print_sdhc3_regs--175 regs->mixctrl = 0219c048, value=0x18 -----print_sdhc3_regs--176 regs->dllctrl = 0219c060, value=0x1000001 -----print_sdhc3_regs--177 regs->dllstatus = 0219c064, value=0x3c07 -----print_sdhc3_regs--178 regs->clktunectrlstatus = 0219c068, value=0x0 -----print_sdhc3_regs--179 regs->vendorspec = 0219c0c0, value=0x20007809 -----print_sdhc3_regs--180 regs->mmcboot = 0219c0c4, value=0x0 -----print_sdhc3_regs--181 regs->hostver = 0219c0fc, value=0x3 -----print_sdhc3_regs--182 发现在有如下几个寄存器不同之处： 1）uSDHCx_PRES_STATE a)bit[11] Buffer Read Enable This status bit is used for non-DMA read transfers. The uSDHC implements an internal buffer to transfer data efficiently. This read only flag indicates that valid data exists in the host side buffer. If this bit is high, valid data greater than the watermark level exist in the buffer. A change of this bit from 1 to 0 occurs when some reads from the buffer(read DATPORT (Base + 0x20)) are made and the buffer hasn't valid data greater than the watermark level. A change of this bit from 0 to1 occurs when there is enough valid data ready in the buffer and the Buffer Read Ready interrupt has been generated and enabled. 1 Read enable 0 Read disable b)bit[7] SD Clock Gated Off Internally This status bit indicates that the SD Clock is internally gated off, because of buffer over / under-run or read pause without read wait assertion, or the driver set FRC_SDCLK_ON bit is 0 to stop the SD clock in idle status. Set IPG_PERCLK_SOFT_EN and CARD_CLK_SOFT_EN to 0 also gate off SD clock. This bit is for the Host Driver to debug data transaction on the SD bus. 1 SD Clock is gated off. 0 SD Clock is active c)bit[2] 1 DATA Line Active 0 DATA Line Inacti 2)uSDHCx_INT_STATUS a)bit[5] Buffer Read Ready This status bit is set if the Buffer Read Enable bit, in the Present State register, changes from 0 to 1. Refer to the Buffer Read Enable bit in the Present State register for additional information. 1 Ready to read buffer 0 Not ready to read buffer 发现有问题的板子刚好跟开发板在上面的位相反。故想请教下，mmc_startup-> init_part->test_part_dos->mmc_bread->mm_send_cmd->esdhc_send_cmd这个函数流程具体作用是干什么的？然后这个问题可通过什么方式来进行下一步的调试。谢谢！ 0
2022-11-29 07:48:42　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × HengDu 该类别下有 16 个回答。邀请回答 heks 该类别下有 16 个回答。邀请回答 ChristineGu 该类别下有 16 个回答。邀请回答 nhonglan 该类别下有 15 个回答。邀请回答 yonglanzhang 该类别下有 15 个回答。邀请回答 dfasda 该类别下有 15 个回答。邀请回答 wenminglang 该类别下有 14 个回答。邀请回答 C880U 该类别下有 14 个回答。邀请回答 jhdfvs 该类别下有 14 个回答。邀请回答 chm5 该类别下有 14 个回答。邀请回答 muwersddg 该类别下有 14 个回答。邀请回答杀狼000 该类别下有 14 个回答。邀请回答飞雪9366 该类别下有 13 个回答。邀请回答 billbian 该类别下有 13 个回答。邀请回答 a732538 该类别下有 13 个回答。邀请回答 hrtuoyu 该类别下有 13 个回答。邀请回答 hfgdzc 该类别下有 13 个回答。邀请回答 thyysbk 该类别下有 13 个回答。邀请回答凡人wlj 该类别下有 13 个回答。邀请回答 kszdj113 该类别下有 13 个回答。邀请回答举报李明相关推荐 • imx6dl芯片与imx6q芯片互换启动无反应请问是什么问题呢 352 • iMX6Q u-boot无法在iMX6DL上启动是否正常？ 374 • 如何在imx6dl中的emmc上添加新分区？ 422 • imx6dl是单核运行还是双核运行？ 347 • IMX6无法正常启动 9370 • imx6dl linux4.1.15内核阶段LOGO无法显示什么原因 754 • 请问imx6dl的第四个I2C接口该如何配置使能呢 898 • eMMC用于IMX8M Plus app，当从eMMC启动时就会报错的原因？ 392 • 请问一下IMX6DL的RMII接口有何问题 806 • 请问imx6dl做编码输出1080p图像能达到25fps吗？ 2108 1个回答

答案对人有帮助，有参考价值 0 您好您对核心板有做过什么改动吗，另外我给您找了一篇有关您咨询函数的文章您可以看一看https://blog.csdn.net/zzobin/article/details/7688705

2022-11-29 15:02:58 评论举报李红