OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | The downstream Freescale vendor kernel has a patch that allows determining |
2 | if raw NAND flash mode is provided via a debugfs file. This is not present |
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3 | in upstream kernels, but the raw access support was added in the 3.19 |
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4 | kernel, so we will check the kernel version if we can't find the file. |
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5 | --- a/src/mtd.c |
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6 | +++ b/src/mtd.c |
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7 | @@ -34,6 +34,7 @@ |
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8 | #include <errno.h> |
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9 | #include <sys/types.h> |
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10 | #include <sys/ioctl.h> |
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11 | +#include <sys/utsname.h> |
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12 | |||
13 | #include "mtd.h" |
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14 | #include "rand.h" |
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15 | @@ -808,15 +809,27 @@ struct mtd_data *mtd_open(const struct m |
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16 | md->cfg = *cfg; |
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17 | |||
18 | /* check if use new raw access mode */ |
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19 | + /* by looking for debugfs from fsl patch */ |
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20 | + md->raw_mode_flag = 0; |
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21 | fp = fopen("/sys/kernel/debug/gpmi-nand/raw_mode", "r"); |
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22 | if (!fp) { |
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23 | - md->raw_mode_flag = 0; |
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24 | - vp(md, "mtd: use legacy raw access mode\n"); |
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25 | + /* fallback to kernel version: raw access added in 3.19 */ |
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26 | + struct utsname uts; |
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27 | + if (!uname(&uts)) { |
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28 | + int major = 0, minor = 0; |
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29 | + sscanf(uts.release, "%d.%d", &major, &minor); |
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30 | + vp(md, "mtd: Linux %d.%d\n", major, minor); |
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31 | + if ((major << 8 | minor) > (3 << 8 | 18)) |
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32 | + md->raw_mode_flag = 1; |
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33 | + } |
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34 | } else { |
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35 | fclose(fp); |
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36 | md->raw_mode_flag = 1; |
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37 | - vp(md, "mtd: use new bch layout raw access mode\n"); |
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38 | } |
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39 | + if (md->raw_mode_flag) |
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40 | + vp(md, "mtd: use new bch layout raw access mode\n"); |
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41 | + else |
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42 | + vp(md, "mtd: use legacy raw access mode\n"); |
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43 | |||
44 | if (plat_config_data->m_u32UseMultiBootArea) { |
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45 |