diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0135-bcm2835-sdhost-Add-debug_flags-dtparam.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0135-bcm2835-sdhost-Add-debug_flags-dtparam.patch | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0135-bcm2835-sdhost-Add-debug_flags-dtparam.patch b/target/linux/brcm2708/patches-4.4/0135-bcm2835-sdhost-Add-debug_flags-dtparam.patch new file mode 100644 index 0000000000..36c3c50837 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0135-bcm2835-sdhost-Add-debug_flags-dtparam.patch @@ -0,0 +1,120 @@ +From d038f759d55f39c97e4232851e821b5e4b2fe7a2 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 22 Jan 2016 16:03:24 +0000 +Subject: [PATCH 135/232] bcm2835-sdhost: Add debug_flags dtparam + +Bit zero disables the single-read-sectors map: + +If the default MMC driver is bcm2835-mmc: + dtoverlay=sdhost,debug_flags=1 +If the default MMC driver is bcm2835-sdhost: + dtoverlay=sdtweak,debug_flags=1 +(although the sdhost overlay may also work, sdtweak is +less invasive and will work in more circumstances). + +Also revert the timeout change, just in case. +--- + arch/arm/boot/dts/overlays/sdhost-overlay.dts | 2 ++ + arch/arm/boot/dts/overlays/sdtweak-overlay.dts | 2 ++ + drivers/mmc/host/bcm2835-sdhost.c | 26 +++++++++++++++++++++----- + 3 files changed, 25 insertions(+), 5 deletions(-) + +--- a/arch/arm/boot/dts/overlays/sdhost-overlay.dts ++++ b/arch/arm/boot/dts/overlays/sdhost-overlay.dts +@@ -16,6 +16,7 @@ + frag1: __overlay__ { + brcm,overclock-50 = <0>; + brcm,pio-limit = <1>; ++ brcm,debug-flags = <0>; + status = "okay"; + }; + }; +@@ -25,5 +26,6 @@ + force_pio = <&frag1>,"brcm,force-pio?"; + pio_limit = <&frag1>,"brcm,pio-limit:0"; + debug = <&frag1>,"brcm,debug?"; ++ debug_flags = <&frag1>,"brcm,debug-flags:0"; + }; + }; +--- a/arch/arm/boot/dts/overlays/sdtweak-overlay.dts ++++ b/arch/arm/boot/dts/overlays/sdtweak-overlay.dts +@@ -9,6 +9,7 @@ + frag1: __overlay__ { + brcm,overclock-50 = <0>; + brcm,pio-limit = <1>; ++ brcm,debug-flags = <0>; + }; + }; + +@@ -17,5 +18,6 @@ + force_pio = <&frag1>,"brcm,force-pio?"; + pio_limit = <&frag1>,"brcm,pio-limit:0"; + debug = <&frag1>,"brcm,debug?"; ++ debug_flags = <&frag1>,"brcm,debug-flags:0"; + }; + }; +--- a/drivers/mmc/host/bcm2835-sdhost.c ++++ b/drivers/mmc/host/bcm2835-sdhost.c +@@ -174,6 +174,8 @@ struct bcm2835_host { + u32 overclock; /* Current frequency if overclocked, else zero */ + u32 pio_limit; /* Maximum block count for PIO (0 = always DMA) */ + ++ u32 debug_flags; ++ + u32 sectors; /* Cached card size in sectors */ + u32 single_read_sectors[8]; + }; +@@ -682,7 +684,7 @@ static void bcm2835_sdhost_prepare_data( + host->flush_fifo = 0; + host->data->bytes_xfered = 0; + +- if (!host->sectors && host->mmc->card) ++ if (!host->sectors && host->mmc->card && !(host->debug_flags & 1)) + { + struct mmc_card *card = host->mmc->card; + if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { +@@ -1486,8 +1488,8 @@ void bcm2835_sdhost_set_clock(struct bcm + host->cdiv = div; + bcm2835_sdhost_write(host, host->cdiv, SDCDIV); + +- /* Set the timeout to 250ms */ +- bcm2835_sdhost_write(host, host->mmc->actual_clock/4, SDTOUT); ++ /* Set the timeout to 500ms */ ++ bcm2835_sdhost_write(host, host->mmc->actual_clock/2, SDTOUT); + + if (host->debug) + pr_info("%s: clock=%d -> max_clk=%d, cdiv=%x (actual clock %d)\n", +@@ -1606,8 +1608,16 @@ static int bcm2835_sdhost_multi_io_quirk + + host = mmc_priv(card->host); + +- if (direction == MMC_DATA_READ) +- { ++ if (!host->sectors) { ++ /* csd.capacity is in weird units - convert to sectors */ ++ u32 card_sectors = (card->csd.capacity << (card->csd.read_blkbits - 9)); ++ if ((direction == MMC_DATA_READ) && ++ ((blk_pos + blk_size) == card_sectors)) ++ blk_size--; ++ return blk_size; ++ } ++ ++ if (direction == MMC_DATA_READ) { + int i; + int sector; + for (i = 0; blk_pos > (sector = host->single_read_sectors[i]); i++) +@@ -1838,8 +1848,14 @@ static int bcm2835_sdhost_probe(struct p + host->allow_dma = ALLOW_DMA && + !of_property_read_bool(node, "brcm,force-pio"); + host->debug = of_property_read_bool(node, "brcm,debug"); ++ of_property_read_u32(node, ++ "brcm,debug-flags", ++ &host->debug_flags); + } + ++ if (host->debug_flags) ++ dev_err(dev, "debug_flags=%x\n", host->debug_flags); ++ + if (host->allow_dma) { + if (node) { + host->dma_chan_tx = |