diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0134-bcm2835-sdhost-Add-workaround-for-odd-behaviour-on-s.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0134-bcm2835-sdhost-Add-workaround-for-odd-behaviour-on-s.patch | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0134-bcm2835-sdhost-Add-workaround-for-odd-behaviour-on-s.patch b/target/linux/brcm2708/patches-4.4/0134-bcm2835-sdhost-Add-workaround-for-odd-behaviour-on-s.patch deleted file mode 100644 index 705eb770aa..0000000000 --- a/target/linux/brcm2708/patches-4.4/0134-bcm2835-sdhost-Add-workaround-for-odd-behaviour-on-s.patch +++ /dev/null @@ -1,137 +0,0 @@ -From 2c8808d44f2555d0385082010a870a05ac888a5c Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Tue, 19 Jan 2016 17:16:38 +0000 -Subject: [PATCH] bcm2835-sdhost: Add workaround for odd behaviour on some - cards - -For reasons not understood, the sdhost driver fails when reading -sectors very near the end of some SD cards. The problem could -be related to the similar issue that reading the final sector -of any card as part of a multiple read never completes, and the -workaround is an extension of the mechanism introduced to solve -that problem which ensures those sectors are always read singly. ---- - drivers/mmc/host/bcm2835-sdhost.c | 61 +++++++++++++++++++++++++++++++++------ - 1 file changed, 52 insertions(+), 9 deletions(-) - ---- a/drivers/mmc/host/bcm2835-sdhost.c -+++ b/drivers/mmc/host/bcm2835-sdhost.c -@@ -173,6 +173,9 @@ struct bcm2835_host { - u32 overclock_50; /* frequency to use when 50MHz is requested (in MHz) */ - u32 overclock; /* Current frequency if overclocked, else zero */ - u32 pio_limit; /* Maximum block count for PIO (0 = always DMA) */ -+ -+ u32 sectors; /* Cached card size in sectors */ -+ u32 single_read_sectors[8]; - }; - - -@@ -277,6 +280,9 @@ static void bcm2835_sdhost_reset_interna - { - u32 temp; - -+ if (host->debug) -+ pr_info("%s: reset\n", mmc_hostname(host->mmc)); -+ - bcm2835_sdhost_set_power(host, false); - - bcm2835_sdhost_write(host, 0, SDCMD); -@@ -299,6 +305,8 @@ static void bcm2835_sdhost_reset_interna - bcm2835_sdhost_set_power(host, true); - mdelay(10); - host->clock = 0; -+ host->sectors = 0; -+ host->single_read_sectors[0] = ~0; - bcm2835_sdhost_write(host, host->hcfg, SDHCFG); - bcm2835_sdhost_write(host, host->cdiv, SDCDIV); - mmiowb(); -@@ -309,8 +317,6 @@ static void bcm2835_sdhost_reset(struct - { - struct bcm2835_host *host = mmc_priv(mmc); - unsigned long flags; -- if (host->debug) -- pr_info("%s: reset\n", mmc_hostname(mmc)); - spin_lock_irqsave(&host->lock, flags); - - bcm2835_sdhost_reset_internal(host); -@@ -676,6 +682,32 @@ static void bcm2835_sdhost_prepare_data( - host->flush_fifo = 0; - host->data->bytes_xfered = 0; - -+ if (!host->sectors && host->mmc->card) -+ { -+ struct mmc_card *card = host->mmc->card; -+ if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { -+ /* -+ * The EXT_CSD sector count is in number of 512 byte -+ * sectors. -+ */ -+ host->sectors = card->ext_csd.sectors; -+ pr_err("%s: using ext_csd!\n", mmc_hostname(host->mmc)); -+ } else { -+ /* -+ * The CSD capacity field is in units of read_blkbits. -+ * set_capacity takes units of 512 bytes. -+ */ -+ host->sectors = card->csd.capacity << -+ (card->csd.read_blkbits - 9); -+ } -+ host->single_read_sectors[0] = host->sectors - 65; -+ host->single_read_sectors[1] = host->sectors - 64; -+ host->single_read_sectors[2] = host->sectors - 33; -+ host->single_read_sectors[3] = host->sectors - 32; -+ host->single_read_sectors[4] = host->sectors - 1; -+ host->single_read_sectors[5] = ~0; /* Safety net */ -+ } -+ - host->use_dma = host->have_dma && (data->blocks > host->pio_limit); - if (!host->use_dma) { - int flags; -@@ -1246,6 +1278,10 @@ static u32 bcm2835_sdhost_block_irq(stru - - bcm2835_sdhost_finish_data(host); - } else { -+ /* Reset the timer */ -+ mod_timer(&host->pio_timer, -+ jiffies + host->pio_timeout); -+ - bcm2835_sdhost_transfer_pio(host); - - /* Reset the timer */ -@@ -1450,8 +1486,8 @@ void bcm2835_sdhost_set_clock(struct bcm - host->cdiv = div; - bcm2835_sdhost_write(host, host->cdiv, SDCDIV); - -- /* Set the timeout to 500ms */ -- bcm2835_sdhost_write(host, host->mmc->actual_clock/2, SDTOUT); -+ /* Set the timeout to 250ms */ -+ bcm2835_sdhost_write(host, host->mmc->actual_clock/4, SDTOUT); - - if (host->debug) - pr_info("%s: clock=%d -> max_clk=%d, cdiv=%x (actual clock %d)\n", -@@ -1566,13 +1602,20 @@ static int bcm2835_sdhost_multi_io_quirk - reading the final sector of the card as part of a multiple read - problematic. Detect that case and shorten the read accordingly. - */ -- /* csd.capacity is in weird units - convert to sectors */ -- u32 card_sectors = (card->csd.capacity << (card->csd.read_blkbits - 9)); -+ struct bcm2835_host *host; -+ -+ host = mmc_priv(card->host); - -- if ((direction == MMC_DATA_READ) && -- ((blk_pos + blk_size) == card_sectors)) -- blk_size--; -+ if (direction == MMC_DATA_READ) -+ { -+ int i; -+ int sector; -+ for (i = 0; blk_pos > (sector = host->single_read_sectors[i]); i++) -+ continue; - -+ if ((blk_pos + blk_size) > sector) -+ blk_size = (blk_pos == sector) ? 1 : (sector - blk_pos); -+ } - return blk_size; - } - |