mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
121 lines
3.8 KiB
Diff
121 lines
3.8 KiB
Diff
From b08d7543b04d9b9d82073ed5c61123be28f5300d Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Fri, 22 Jan 2016 16:03:24 +0000
|
|
Subject: [PATCH] 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 =
|