diff options
Diffstat (limited to 'recipes/u-boot/u-boot-1.1.4/at32stk1000/fix-mmc-data-timeout.patch')
| -rw-r--r-- | recipes/u-boot/u-boot-1.1.4/at32stk1000/fix-mmc-data-timeout.patch | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/recipes/u-boot/u-boot-1.1.4/at32stk1000/fix-mmc-data-timeout.patch b/recipes/u-boot/u-boot-1.1.4/at32stk1000/fix-mmc-data-timeout.patch new file mode 100644 index 0000000000..d78cbcaaaa --- /dev/null +++ b/recipes/u-boot/u-boot-1.1.4/at32stk1000/fix-mmc-data-timeout.patch @@ -0,0 +1,101 @@ +--- + cpu/at32ap7xxx/mmc.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 58 insertions(+) + +Index: u-boot-1.1.4-avr32/cpu/at32ap7xxx/mmc.c +=================================================================== +--- u-boot-1.1.4-avr32.orig/cpu/at32ap7xxx/mmc.c 2007-01-30 14:53:33.000000000 +0100 ++++ u-boot-1.1.4-avr32/cpu/at32ap7xxx/mmc.c 2007-01-30 15:45:37.000000000 +0100 +@@ -67,6 +67,7 @@ struct mmci { + unsigned int rca; + block_dev_desc_t blkdev; + const struct device *dev; ++ int card_is_sd; + }; + + struct mmci mmci = { +@@ -391,6 +392,8 @@ static int sd_init_card(struct mmci *mmc + mmc->rca = resp[0] >> 16; + if (verbose) + printf("SD Card detected (RCA %u)\n", mmc->rca); ++ mmc->card_is_sd = 1; ++ + return 0; + } + +@@ -425,6 +428,57 @@ static int mmc_init_card(struct mmci *mm + return ret; + } + ++static void mci_set_data_timeout(struct mmci *mmc, struct mmc_csd *csd) ++{ ++ static const unsigned int dtomul_to_shift[] = { ++ 0, 4, 7, 8, 10, 12, 16, 20, ++ }; ++ static const unsigned int taac_exp[] = { ++ 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, ++ }; ++ static const unsigned int taac_mant[] = { ++ 0, 10, 12, 13, 15, 60, 25, 30, ++ 35, 40, 45, 50, 55, 60, 70, 80, ++ }; ++ unsigned int timeout_ns, timeout_clks; ++ unsigned int e, m; ++ unsigned int dtocyc, dtomul; ++ u32 dtor; ++ ++ e = csd->taac & 0x07; ++ m = (csd->taac >> 3) & 0x0f; ++ ++ timeout_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; ++ timeout_clks = csd->nsac * 100; ++ ++ timeout_clks += (((timeout_ns + 9) / 10) ++ * ((CFG_MMC_CLK_PP + 99999) / 100000) + 9999) / 10000; ++ if (!mmc->card_is_sd) ++ timeout_clks *= 10; ++ else ++ timeout_clks *= 100; ++ ++ dtocyc = timeout_clks; ++ dtomul = 0; ++ while (dtocyc > 15 && dtomul < 8) { ++ dtomul++; ++ dtocyc = timeout_clks >> dtomul_to_shift[dtomul]; ++ } ++ ++ if (dtomul >= 8) { ++ dtomul = 7; ++ dtocyc = 15; ++ puts("Warning: Using maximum data timeout\n"); ++ } ++ ++ dtor = (MMCI_MKBF(MCI_DTOR_DTOMUL, dtomul) ++ | MMCI_MKBF(MCI_DTOR_DTOCYC, dtocyc)); ++ mmci_writel(&mmci, MCI_DTOR, dtor); ++ ++ printf("mmc: Using %u cycles data timeout (DTOR=0x%x)\n", ++ dtocyc << dtomul_to_shift[dtomul], dtor); ++} ++ + int mmc_init(int verbose) + { + struct mmc_cid cid; +@@ -443,6 +497,8 @@ int mmc_init(int verbose) + mmci_writel(&mmci, MCI_IDR, ~0UL); + mci_set_mode(CFG_MMC_CLK_OD, CFG_MMC_BLKLEN); + ++ mmci.card_is_sd = 0; ++ + ret = sd_init_card(&mmci, &cid, verbose); + if (ret) { + mmci.rca = MMC_DEFAULT_RCA; +@@ -458,6 +514,8 @@ int mmc_init(int verbose) + if (verbose) + mmc_dump_csd(&csd); + ++ mci_set_data_timeout(&mmci, &csd); ++ + /* Initialize the blockdev structure */ + sprintf(mmci.blkdev.vendor, + "Man %02x%04x Snr %08x", |