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brcm2708: update patches to latest version

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As usual these patches were extracted from the raspberry repo:
https://github.com/raspberrypi/linux/commits/rpi-4.4.y

- Disable unused MFD RPISENSE driver.
- Disable ethernet HW checksums in order to avoid kernel exceptions.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 48985
v19.07.3_mercusys_ac12_duma
John Crispin 8 years ago
parent 48e6ccc4e1
commit f78f271c1e
13 changed files with 763 additions and 6 deletions
Show Stats Download Patch File Download Diff File

7
target/linux/brcm2708/modules.mk
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@ -274,7 +274,6 @@ define KernelPackage/spi-bcm2835
SUBMENU:=$(SPI_MENU)
TITLE:=BCM2835 SPI controller driver
KCONFIG:=\
CONFIG_BCM2708_SPIDEV=n \
CONFIG_SPI=y \
CONFIG_SPI_BCM2835 \
CONFIG_SPI_MASTER=y
@ -293,7 +292,6 @@ define KernelPackage/spi-bcm2835-aux
SUBMENU:=$(SPI_MENU)
TITLE:=BCM2835 Aux SPI controller driver
KCONFIG:=\
CONFIG_BCM2708_SPIDEV=n \
CONFIG_SPI=y \
CONFIG_SPI_BCM2835AUX \
CONFIG_SPI_MASTER=y
@ -331,8 +329,7 @@ define KernelPackage/i2c-bcm2708
$(call i2c_defaults,$(I2C_BCM2708_MODULES),59)
TITLE:=Broadcom BCM2708 I2C master controller driver
KCONFIG+= \
CONFIG_I2C_BCM2708_BAUDRATE=100000 \
CONFIG_MFD_RPISENSE_CORE=n
CONFIG_I2C_BCM2708_BAUDRATE=100000
DEPENDS:=@TARGET_brcm2708 +kmod-i2c-core
endef
@ -348,8 +345,6 @@ I2C_BCM2835_MODULES:=\
define KernelPackage/i2c-bcm2835
$(call i2c_defaults,$(I2C_BCM2835_MODULES),59)
TITLE:=Broadcom BCM2835 I2C master controller driver
KCONFIG+= \
CONFIG_MFD_RPISENSE_CORE=n
DEPENDS:=@TARGET_brcm2708 +kmod-i2c-core
endef

0
target/linux/brcm2708/patches-4.4/0051-fdt-Add-support-for-the-CONFIG_CMDLINE_EXTEND-option.patch
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96
target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch
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@ -0,0 +1,96 @@
From 42a9bb566fe376a1add4b3780c1b830f64500faa Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 2 Mar 2016 10:59:05 +0000
Subject: [PATCH 171/180] BCM270X_DT: Add pi3-disable-bt overlay
Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15. To disable
the systemd service that initialises the modem so it doesn't use the UART:
sudo systemctl disable hciuart
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 8 ++++
.../boot/dts/overlays/pi3-disable-bt-overlay.dts | 48 ++++++++++++++++++++++
3 files changed, 57 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can0-o
dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -496,6 +496,14 @@ Params: speed Display
[ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
+Name: pi3-disable-bt
+Info: Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
+ N.B. To disable the systemd service that initialises the modem so it
+ doesn't use the UART, use 'sudo systemctl disable hciuart'.
+Load: dtoverlay=pi3-disable-bt
+Params: <None>
+
+
Name: piscreen
Info: PiScreen display by OzzMaker.com
Load: dtoverlay=piscreen,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
@@ -0,0 +1,48 @@
+/dts-v1/;
+/plugin/;
+
+/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
+ To disable the systemd service that initialises the modem so it doesn't use
+ the UART:
+
+ sudo systemctl disable hciuart
+*/
+
+/{
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&uart1>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
+ fragment@1 {
+ target = <&uart0>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_pins>;
+ status = "okay";
+ };
+ };
+
+ fragment@2 {
+ target = <&gpio>;
+ __overlay__ {
+ uart0_pins: uart0_pins {
+ brcm,pins = <14 15>;
+ brcm,function = <4>; /* alt0 */
+ brcm,pull = <0 2>;
+ };
+ };
+ };
+
+ fragment@3 {
+ target-path = "/aliases";
+ __overlay__ {
+ serial0 = "/soc/uart@7e201000";
+ serial1 = "/soc/uart@7e215040";
+ };
+ };
+};

117
target/linux/brcm2708/patches-4.4/0172-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch
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@ -0,0 +1,117 @@
From 3b93a5e60a2272bea6b50561c6e871dde5295dfb Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 7 Mar 2016 09:53:03 +0000
Subject: [PATCH 172/180] BCM270X_DT: Add pi3-miniuart-bt DT overlay
Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
usable baudrate.
It is also necessary to edit /lib/systemd/system/hciuart.server and
replace ttyAMA0 with ttyS0.
If cmdline.txt uses the alias serial0 to refer to the user-accessable port
then the firmware will replace with the appropriate port whether or not
this overlay is used.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 10 ++++
.../boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 61 ++++++++++++++++++++++
3 files changed, 72 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -40,6 +40,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-o
dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -504,6 +504,16 @@ Load: dtoverlay=pi3-disable-bt
Params: <None>
+Name: pi3-miniuart-bt
+Info: Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
+ UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
+ usable baudrate.
+ N.B. It is also necessary to edit /lib/systemd/system/hciuart.server
+ and replace ttyAMA0 with ttyS0.
+Load: dtoverlay=pi3-miniuart-bt
+Params: <None>
+
+
Name: piscreen
Info: PiScreen display by OzzMaker.com
Load: dtoverlay=piscreen,<param>=<val>
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
@@ -0,0 +1,61 @@
+/dts-v1/;
+/plugin/;
+
+/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
+ UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
+ usable baudrate.
+
+ It is also necessary to edit /lib/systemd/system/hciuart.server and
+ replace ttyAMA0 with ttyS0.
+
+ If cmdline.txt uses the alias serial0 to refer to the user-accessable port
+ then the firmware will replace with the appropriate port whether or not
+ this overlay is used.
+*/
+
+/{
+ compatible = "brcm,bcm2708";
+
+ fragment@0 {
+ target = <&uart0>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart0_pins>;
+ status = "okay";
+ };
+ };
+
+ fragment@1 {
+ target = <&uart1>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart1_pins>;
+ status = "okay";
+ };
+ };
+
+ fragment@2 {
+ target = <&gpio>;
+ __overlay__ {
+ uart0_pins: uart0_pins {
+ brcm,pins = <14 15>;
+ brcm,function = <4>; /* alt0 */
+ brcm,pull = <0 2>;
+ };
+
+ uart1_pins: uart1_pins {
+ brcm,pins = <32 33>;
+ brcm,function = <2>; /* alt5=UART1 */
+ brcm,pull = <0 0>;
+ };
+ };
+ };
+
+ fragment@3 {
+ target-path = "/aliases";
+ __overlay__ {
+ serial0 = "/soc/uart@7e201000";
+ serial1 = "/soc/uart@7e215040";
+ };
+ };
+};

25
target/linux/brcm2708/patches-4.4/0173-Pi3-DT-Add-dtparams-for-the-SD-interface.patch
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@ -0,0 +1,25 @@
From c8b56d0359160d2aec2ab3168ef9d7c080ae9841 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 7 Mar 2016 13:38:39 +0000
Subject: [PATCH 173/180] Pi3 DT: Add dtparams for the SD interface
Add new base dtparams sd_overclock, sd_force_pio, sd_pio_limit
and sd_debug. These were missed out of the initial Pi3 DTB.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
@@ -188,5 +188,9 @@
audio = <&audio>,"status";
watchdog = <&watchdog>,"status";
random = <&random>,"status";
+ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
+ sd_force_pio = <&sdhost>,"brcm,force-pio?";
+ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+ sd_debug = <&sdhost>,"brcm,debug";
};
};

75
target/linux/brcm2708/patches-4.4/0174-vchiq_arm-Tweak-the-logging-output.patch
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@ -0,0 +1,75 @@
From 48f3f7707a43b019e14216cec7376eba21972f9b Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 7 Mar 2016 15:05:11 +0000
Subject: [PATCH 174/180] vchiq_arm: Tweak the logging output
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
.../vc04_services/interface/vchiq_arm/vchiq_core.c | 31 +++++++++-------------
1 file changed, 13 insertions(+), 18 deletions(-)
--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -891,16 +891,14 @@ queue_message(VCHIQ_STATE_T *state, VCHI
error_count);
return VCHIQ_ERROR;
}
- if (i == 0) {
- if (SRVTRACE_ENABLED(service,
- VCHIQ_LOG_INFO))
- vchiq_log_dump_mem("Sent", 0,
- header->data + pos,
- min(64u,
- elements[0].size));
- }
}
+ if (SRVTRACE_ENABLED(service,
+ VCHIQ_LOG_INFO))
+ vchiq_log_dump_mem("Sent", 0,
+ header->data,
+ min(16, pos));
+
spin_lock(&quota_spinlock);
service_quota->message_use_count++;
@@ -1039,16 +1037,13 @@ queue_message_sync(VCHIQ_STATE_T *state,
error_count);
return VCHIQ_ERROR;
}
- if (i == 0) {
- if (vchiq_sync_log_level >=
- VCHIQ_LOG_TRACE)
- vchiq_log_dump_mem("Sent Sync",
- 0, header->data + pos,
- min(64u,
- elements[0].size));
- }
}
+ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE)
+ vchiq_log_dump_mem("Sent Sync",
+ 0, header->data,
+ min(16, pos));
+
VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count);
VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size);
} else {
@@ -1720,7 +1715,7 @@ parse_rx_slots(VCHIQ_STATE_T *state)
remoteport, localport, size);
if (size > 0)
vchiq_log_dump_mem("Rcvd", 0, header->data,
- min(64, size));
+ min(16, size));
}
if (((unsigned int)header & VCHIQ_SLOT_MASK) + calc_stride(size)
@@ -2187,7 +2182,7 @@ sync_func(void *v)
remoteport, localport, size);
if (size > 0)
vchiq_log_dump_mem("Rcvd", 0, header->data,
- min(64, size));
+ min(16, size));
}
switch (type) {

160
target/linux/brcm2708/patches-4.4/0175-bcm2835-sdhost-Only-claim-one-DMA-channel.patch
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From 06c169985c0884ce67377c79d27383e23f41e2cd Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 7 Mar 2016 16:46:39 +0000
Subject: [PATCH 175/180] bcm2835-sdhost: Only claim one DMA channel
With both MMC controllers enabled there are few DMA channels left. The
bcm2835-sdhost driver only uses DMA in one direction at a time, so it
doesn't need to claim two channels.
See: https://github.com/raspberrypi/linux/issues/1327
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/bcm2708_common.dtsi | 5 +--
drivers/mmc/host/bcm2835-sdhost.c | 70 ++++++++++++++++++++++++-----------
2 files changed, 50 insertions(+), 25 deletions(-)
--- a/arch/arm/boot/dts/bcm2708_common.dtsi
+++ b/arch/arm/boot/dts/bcm2708_common.dtsi
@@ -136,9 +136,8 @@
reg = <0x7e202000 0x100>;
interrupts = <2 24>;
clocks = <&clk_core>;
- dmas = <&dma 13>,
- <&dma 13>;
- dma-names = "tx", "rx";
+ dmas = <&dma 13>;
+ dma-names = "rx-tx";
brcm,overclock-50 = <0>;
brcm,pio-limit = <1>;
status = "disabled";
--- a/drivers/mmc/host/bcm2835-sdhost.c
+++ b/drivers/mmc/host/bcm2835-sdhost.c
@@ -185,9 +185,10 @@ struct bcm2835_host {
unsigned int debug:1; /* Enable debug output */
/*DMA part*/
- struct dma_chan *dma_chan_rx; /* DMA channel for reads */
- struct dma_chan *dma_chan_tx; /* DMA channel for writes */
- struct dma_chan *dma_chan; /* Channel in used */
+ struct dma_chan *dma_chan_rxtx; /* DMA channel for reads and writes */
+ struct dma_chan *dma_chan; /* Channel in use */
+ struct dma_slave_config dma_cfg_rx;
+ struct dma_slave_config dma_cfg_tx;
struct dma_async_tx_descriptor *dma_desc;
u32 dma_dir;
u32 drain_words;
@@ -771,12 +772,11 @@ static void bcm2835_sdhost_prepare_dma(s
log_event("PRD<", (u32)data, 0);
pr_debug("bcm2835_sdhost_prepare_dma()\n");
+ dma_chan = host->dma_chan_rxtx;
if (data->flags & MMC_DATA_READ) {
- dma_chan = host->dma_chan_rx;
dir_data = DMA_FROM_DEVICE;
dir_slave = DMA_DEV_TO_MEM;
} else {
- dma_chan = host->dma_chan_tx;
dir_data = DMA_TO_DEVICE;
dir_slave = DMA_MEM_TO_DEV;
}
@@ -813,6 +813,12 @@ static void bcm2835_sdhost_prepare_dma(s
host->drain_words = len/4;
}
+ /* The parameters have already been validated, so this will not fail */
+ (void)dmaengine_slave_config(dma_chan,
+ (dir_data == DMA_FROM_DEVICE) ?
+ &host->dma_cfg_rx :
+ &host->dma_cfg_tx);
+
len = dma_map_sg(dma_chan->device->dev, data->sg, data->sg_len,
dir_data);
@@ -1805,28 +1811,46 @@ int bcm2835_sdhost_add_host(struct bcm28
spin_lock_init(&host->lock);
if (host->allow_dma) {
- if (IS_ERR_OR_NULL(host->dma_chan_tx) ||
- IS_ERR_OR_NULL(host->dma_chan_rx)) {
- pr_err("%s: unable to initialise DMA channels. "
+ if (IS_ERR_OR_NULL(host->dma_chan_rxtx)) {
+ pr_err("%s: unable to initialise DMA channel. "
"Falling back to PIO\n",
mmc_hostname(mmc));
host->use_dma = false;
} else {
- host->use_dma = true;
-
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.slave_id = 13; /* DREQ channel */
+ /* Validate the slave configurations */
+
cfg.direction = DMA_MEM_TO_DEV;
cfg.src_addr = 0;
cfg.dst_addr = host->bus_addr + SDDATA;
- ret = dmaengine_slave_config(host->dma_chan_tx, &cfg);
- cfg.direction = DMA_DEV_TO_MEM;
- cfg.src_addr = host->bus_addr + SDDATA;
- cfg.dst_addr = 0;
- ret = dmaengine_slave_config(host->dma_chan_rx, &cfg);
+ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
+
+ if (ret == 0) {
+ host->dma_cfg_tx = cfg;
+
+ cfg.direction = DMA_DEV_TO_MEM;
+ cfg.src_addr = host->bus_addr + SDDATA;
+ cfg.dst_addr = 0;
+
+ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
+ }
+
+ if (ret == 0) {
+ host->dma_cfg_rx = cfg;
+
+ host->use_dma = true;
+ } else {
+ pr_err("%s: unable to configure DMA channel. "
+ "Falling back to PIO\n",
+ mmc_hostname(mmc));
+ dma_release_channel(host->dma_chan_rxtx);
+ host->dma_chan_rxtx = NULL;
+ host->use_dma = false;
+ }
}
} else {
host->use_dma = false;
@@ -1948,19 +1972,21 @@ static int bcm2835_sdhost_probe(struct p
if (host->allow_dma) {
if (node) {
- host->dma_chan_tx =
- dma_request_slave_channel(dev, "tx");
- host->dma_chan_rx =
- dma_request_slave_channel(dev, "rx");
+ host->dma_chan_rxtx =
+ dma_request_slave_channel(dev, "rx-tx");
+ if (!host->dma_chan_rxtx)
+ host->dma_chan_rxtx =
+ dma_request_slave_channel(dev, "tx");
+ if (!host->dma_chan_rxtx)
+ host->dma_chan_rxtx =
+ dma_request_slave_channel(dev, "rx");
} else {
dma_cap_mask_t mask;
dma_cap_zero(mask);
/* we don't care about the channel, any would work */
dma_cap_set(DMA_SLAVE, mask);
- host->dma_chan_tx =
- dma_request_channel(mask, NULL, NULL);
- host->dma_chan_rx =
+ host->dma_chan_rxtx =
dma_request_channel(mask, NULL, NULL);
}
}

170
target/linux/brcm2708/patches-4.4/0176-bcm2835-mmc-Only-claim-one-DMA-channel.patch
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From af80d75abc7604cd9eb1788b0171148d000db09d Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 8 Mar 2016 09:49:16 +0000
Subject: [PATCH 176/180] bcm2835-mmc: Only claim one DMA channel
With both MMC controllers enabled there are few DMA channels left. The
bcm2835-mmc driver only uses DMA in one direction at a time, so it
doesn't need to claim two channels.
See: https://github.com/raspberrypi/linux/issues/1327
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/bcm2708_common.dtsi | 5 +--
drivers/mmc/host/bcm2835-mmc.c | 69 +++++++++++++++++++++++++----------
2 files changed, 51 insertions(+), 23 deletions(-)
--- a/arch/arm/boot/dts/bcm2708_common.dtsi
+++ b/arch/arm/boot/dts/bcm2708_common.dtsi
@@ -232,9 +232,8 @@
reg = <0x7e300000 0x100>;
interrupts = <2 30>;
clocks = <&clk_mmc>;
- dmas = <&dma 11>,
- <&dma 11>;
- dma-names = "tx", "rx";
+ dmas = <&dma 11>;
+ dma-names = "rx-tx";
brcm,overclock-50 = <0>;
status = "disabled";
};
--- a/drivers/mmc/host/bcm2835-mmc.c
+++ b/drivers/mmc/host/bcm2835-mmc.c
@@ -108,8 +108,9 @@ struct bcm2835_host {
u32 shadow;
/*DMA part*/
- struct dma_chan *dma_chan_rx; /* DMA channel for reads */
- struct dma_chan *dma_chan_tx; /* DMA channel for writes */
+ struct dma_chan *dma_chan_rxtx; /* DMA channel for reads and writes */
+ struct dma_slave_config dma_cfg_rx;
+ struct dma_slave_config dma_cfg_tx;
struct dma_async_tx_descriptor *tx_desc; /* descriptor */
bool have_dma;
@@ -342,7 +343,7 @@ static void bcm2835_mmc_dma_complete(voi
if (host->data && !(host->data->flags & MMC_DATA_WRITE)) {
/* otherwise handled in SDHCI IRQ */
- dma_chan = host->dma_chan_rx;
+ dma_chan = host->dma_chan_rxtx;
dir_data = DMA_FROM_DEVICE;
dma_unmap_sg(dma_chan->device->dev,
@@ -493,16 +494,21 @@ static void bcm2835_mmc_transfer_dma(str
if (host->blocks == 0)
return;
+ dma_chan = host->dma_chan_rxtx;
if (host->data->flags & MMC_DATA_READ) {
- dma_chan = host->dma_chan_rx;
dir_data = DMA_FROM_DEVICE;
dir_slave = DMA_DEV_TO_MEM;
} else {
- dma_chan = host->dma_chan_tx;
dir_data = DMA_TO_DEVICE;
dir_slave = DMA_MEM_TO_DEV;
}
+ /* The parameters have already been validated, so this will not fail */
+ (void)dmaengine_slave_config(dma_chan,
+ (dir_data == DMA_FROM_DEVICE) ?
+ &host->dma_cfg_rx :
+ &host->dma_cfg_tx);
+
BUG_ON(!dma_chan->device);
BUG_ON(!dma_chan->device->dev);
BUG_ON(!host->data->sg);
@@ -936,7 +942,7 @@ static void bcm2835_mmc_data_irq(struct
if (host->data->flags & MMC_DATA_WRITE) {
/* IRQ handled here */
- dma_chan = host->dma_chan_tx;
+ dma_chan = host->dma_chan_rxtx;
dir_data = DMA_TO_DEVICE;
dma_unmap_sg(dma_chan->device->dev,
host->data->sg, host->data->sg_len,
@@ -1316,28 +1322,47 @@ static int bcm2835_mmc_add_host(struct b
dev_info(dev, "Forcing PIO mode\n");
host->have_dma = false;
#else
- if (IS_ERR_OR_NULL(host->dma_chan_tx) ||
- IS_ERR_OR_NULL(host->dma_chan_rx)) {
- dev_err(dev, "%s: Unable to initialise DMA channels. Falling back to PIO\n",
+ if (IS_ERR_OR_NULL(host->dma_chan_rxtx)) {
+ dev_err(dev, "%s: Unable to initialise DMA channel. Falling back to PIO\n",
DRIVER_NAME);
host->have_dma = false;
} else {
- dev_info(dev, "DMA channels allocated");
- host->have_dma = true;
+ dev_info(dev, "DMA channel allocated");
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.slave_id = 11; /* DREQ channel */
+ /* Validate the slave configurations */
+
cfg.direction = DMA_MEM_TO_DEV;
cfg.src_addr = 0;
cfg.dst_addr = host->bus_addr + SDHCI_BUFFER;
- ret = dmaengine_slave_config(host->dma_chan_tx, &cfg);
- cfg.direction = DMA_DEV_TO_MEM;
- cfg.src_addr = host->bus_addr + SDHCI_BUFFER;
- cfg.dst_addr = 0;
- ret = dmaengine_slave_config(host->dma_chan_rx, &cfg);
+ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
+
+ if (ret == 0) {
+ host->dma_cfg_tx = cfg;
+
+ cfg.direction = DMA_DEV_TO_MEM;
+ cfg.src_addr = host->bus_addr + SDHCI_BUFFER;
+ cfg.dst_addr = 0;
+
+ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
+ }
+
+ if (ret == 0) {
+ host->dma_cfg_rx = cfg;
+
+ host->use_dma = true;
+ } else {
+ pr_err("%s: unable to configure DMA channel. "
+ "Faling back to PIO\n",
+ mmc_hostname(mmc));
+ dma_release_channel(host->dma_chan_rxtx);
+ host->dma_chan_rxtx = NULL;
+ host->use_dma = false;
+ }
}
#endif
mmc->max_segs = 128;
@@ -1416,16 +1441,20 @@ static int bcm2835_mmc_probe(struct plat
#ifndef FORCE_PIO
if (node) {
- host->dma_chan_tx = dma_request_slave_channel(dev, "tx");
- host->dma_chan_rx = dma_request_slave_channel(dev, "rx");
+ host->dma_chan_rxtx = dma_request_slave_channel(dev, "rx-tx");
+ if (!host->dma_chan_rxtx)
+ host->dma_chan_rxtx =
+ dma_request_slave_channel(dev, "tx");
+ if (!host->dma_chan_rxtx)
+ host->dma_chan_rxtx =
+ dma_request_slave_channel(dev, "rx");
} else {
dma_cap_mask_t mask;
dma_cap_zero(mask);
/* we don't care about the channel, any would work */
dma_cap_set(DMA_SLAVE, mask);
- host->dma_chan_tx = dma_request_channel(mask, NULL, NULL);
- host->dma_chan_rx = dma_request_channel(mask, NULL, NULL);
+ host->dma_chan_rxtx = dma_request_channel(mask, NULL, NULL);
}
#endif
clk = devm_clk_get(dev, NULL);

28
target/linux/brcm2708/patches-4.4/0177-config-rebuild-with-savedefconfig.patch
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@ -0,0 +1,28 @@
From 0b65dbd40ad6b3d7cc979e8b7817f74b823f66ef Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Tue, 8 Mar 2016 17:08:39 +0000
Subject: [PATCH 177/180] config: rebuild with savedefconfig
---
arch/arm/configs/bcm2709_defconfig | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -593,7 +593,6 @@ CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_TTY_PRINTK=y
CONFIG_HW_RANDOM=y
-CONFIG_HW_RANDOM_BCM2835=y
CONFIG_RAW_DRIVER=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=m
@@ -1112,7 +1111,7 @@ CONFIG_EXTCON=m
CONFIG_EXTCON_ARIZONA=m
CONFIG_IIO=m
CONFIG_IIO_BUFFER=y
-CONFIG_IIO_BUFFER_CB=y
+CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_KFIFO_BUF=m
CONFIG_MCP320X=m
CONFIG_DHT11=m

30
target/linux/brcm2708/patches-4.4/0178-config-Add-module-for-mcp3422-ADC.patch
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@ -0,0 +1,30 @@
From 1e19acaf4b88ee6dcbe8843a07a04edf177be7c3 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Tue, 8 Mar 2016 17:06:33 +0000
Subject: [PATCH 178/180] config: Add module for mcp3422 ADC
---
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
2 files changed, 2 insertions(+)
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -1114,6 +1114,7 @@ CONFIG_IIO_BUFFER=y
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_KFIFO_BUF=m
CONFIG_MCP320X=m
+CONFIG_MCP3422=m
CONFIG_DHT11=m
CONFIG_PWM_BCM2835=m
CONFIG_RASPBERRYPI_FIRMWARE=y
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -1121,6 +1121,7 @@ CONFIG_IIO_BUFFER=y
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_KFIFO_BUF=m
CONFIG_MCP320X=m
+CONFIG_MCP3422=m
CONFIG_DHT11=m
CONFIG_PWM_BCM2835=m
CONFIG_RASPBERRYPI_FIRMWARE=y

40
target/linux/brcm2708/patches-4.4/0179-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch
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@ -0,0 +1,40 @@
From e064caf725672cb95cc8327f4dc55d3de257cd74 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 8 Mar 2016 16:18:57 +0000
Subject: [PATCH 179/180] Pi3 DT: Add pull-ups on the UART RX lines
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 4 ++--
arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
@@ -53,13 +53,13 @@
uart0_pins: uart0_pins {
brcm,pins = <32 33>;
brcm,function = <7>; /* alt3=UART0 */
- brcm,pull = <0 0>;
+ brcm,pull = <0 2>;
};
uart1_pins: uart1_pins {
brcm,pins = <14 15>;
brcm,function = <2>; /* alt5=UART1 */
- brcm,pull = <0 0>;
+ brcm,pull = <0 2>;
};
};
--- a/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
+++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
@@ -46,7 +46,7 @@
uart1_pins: uart1_pins {
brcm,pins = <32 33>;
brcm,function = <2>; /* alt5=UART1 */
- brcm,pull = <0 0>;
+ brcm,pull = <0 2>;
};
};
};

10
target/linux/brcm2708/patches-4.4/1000-mfd-rpisense-disable.patch
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@ -0,0 +1,10 @@
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -13,6 +13,7 @@ config MFD_CORE
config MFD_RPISENSE_CORE
tristate "Raspberry Pi Sense HAT core functions"
depends on I2C
+ depends on BROKEN
select MFD_CORE
help
This is the core driver for the Raspberry Pi Sense HAT. This provides

11
target/linux/brcm2708/patches-4.4/1001-smsc95xx-disable-hw-csum.patch
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@ -0,0 +1,11 @@
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -42,7 +42,7 @@
#define LAN95XX_EEPROM_MAGIC (0x9500)
#define EEPROM_MAC_OFFSET (0x01)
#define DEFAULT_TX_CSUM_ENABLE (true)
-#define DEFAULT_RX_CSUM_ENABLE (true)
+#define DEFAULT_RX_CSUM_ENABLE (false)
#define SMSC95XX_INTERNAL_PHY_ID (1)
#define SMSC95XX_TX_OVERHEAD (8)
#define SMSC95XX_TX_OVERHEAD_CSUM (12)
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