linux-ti-staging: add latest critical fixes locally for now

Signed-off-by: Denys Dmytriyenko <denys@ti.com>

5 files changed, 297 insertions, 1 deletions

diff --git a/recipes-kernel/linux/linux-ti-staging/0001-Revert-usb-musb-musb_cppi41-Revert-the-Advisory-1.0..patch b/recipes-kernel/linux/linux-ti-staging/0001-Revert-usb-musb-musb_cppi41-Revert-the-Advisory-1.0..patch
new file mode 100644
index 00000000..dcb33226
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti-staging/0001-Revert-usb-musb-musb_cppi41-Revert-the-Advisory-1.0..patch
@@ -0,0 +1,158 @@
+From f576e148cd15f10224e4ce13b6773717682f9a5a Mon Sep 17 00:00:00 2001
+From: Chase Maupin <Chase.Maupin@ti.com>
+Date: Fri, 21 Feb 2014 09:05:48 -0600
+Subject: [PATCH 1/4] Revert "usb: musb: musb_cppi41: Revert the Advisory 1.0.13 workaround"
+
+This reverts commit c424ef3e2beb89488e7e597446b4c6bc8f1852c5.
+---
+ drivers/usb/musb/musb_cppi41.c |   96 +++++++++++++++++++++++++++++++++-------
+ 1 files changed, 79 insertions(+), 17 deletions(-)
+
+diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
+index d02facc..01df8f9 100644
+--- a/drivers/usb/musb/musb_cppi41.c
++++ b/drivers/usb/musb/musb_cppi41.c
+@@ -31,6 +31,7 @@ struct cppi41_dma_channel {
+        u8 port_num;
+        u8 is_tx;
+        u8 is_allocated;
++       u8 usb_toggle;
+ 
+        dma_addr_t buf_addr;
+        u32 total_len;
+@@ -55,6 +56,50 @@ struct cppi41_dma_controller {
+        u32 auto_req;
+ };
+ 
++static void save_rx_toggle(struct cppi41_dma_channel *cppi41_channel)
++{
++       u16 csr;
++       u8 toggle;
++
++       if (cppi41_channel->is_tx)
++               return;
++       if (!is_host_active(cppi41_channel->controller->musb))
++               return;
++
++       csr = musb_readw(cppi41_channel->hw_ep->regs, MUSB_RXCSR);
++       toggle = csr & MUSB_RXCSR_H_DATATOGGLE ? 1 : 0;
++
++       cppi41_channel->usb_toggle = toggle;
++}
++
++static void update_rx_toggle(struct cppi41_dma_channel *cppi41_channel)
++{
++       u16 csr;
++       u8 toggle;
++
++       if (cppi41_channel->is_tx)
++               return;
++       if (!is_host_active(cppi41_channel->controller->musb))
++               return;
++
++       csr = musb_readw(cppi41_channel->hw_ep->regs, MUSB_RXCSR);
++       toggle = csr & MUSB_RXCSR_H_DATATOGGLE ? 1 : 0;
++
++       /*
++        * AM335x Advisory 1.0.13: Due to internal synchronisation error the
++        * data toggle may reset from DATA1 to DATA0 during receiving data from
++        * more than one endpoint.
++        */
++       if (!toggle && toggle == cppi41_channel->usb_toggle) {
++               csr |= MUSB_RXCSR_H_DATATOGGLE | MUSB_RXCSR_H_WR_DATATOGGLE;
++               musb_writew(cppi41_channel->hw_ep->regs, MUSB_RXCSR, csr);
++               dev_dbg(cppi41_channel->controller->musb->controller,
++                               "Restoring DATA1 toggle.\n");
++       }
++
++       cppi41_channel->usb_toggle = toggle;
++}
++
+ static bool musb_is_tx_fifo_empty(struct musb_hw_ep *hw_ep)
+ {
+        u8              epnum = hw_ep->epnum;
+@@ -217,6 +262,8 @@ static void cppi41_dma_callback(void *private_data)
+                hw_ep->epnum, cppi41_channel->transferred,
+                cppi41_channel->total_len);
+ 
++       update_rx_toggle(cppi41_channel);
++
+        if (cppi41_channel->transferred == cppi41_channel->total_len ||
+                        transferred < cppi41_channel->packet_sz)
+                cppi41_channel->prog_len = 0;
+@@ -347,6 +394,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
+        struct dma_async_tx_descriptor *dma_desc;
+        enum dma_transfer_direction direction;
+        struct musb *musb = cppi41_channel->controller->musb;
++       unsigned use_gen_rndis = 0;
+ 
+        dev_dbg(musb->controller,
+                "configure ep%d/%x packet_sz=%d, mode=%d, dma_addr=0x%llx, len=%d is_tx=%d\n",
+@@ -359,26 +407,39 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
+        cppi41_channel->transferred = 0;
+        cppi41_channel->packet_sz = packet_sz;
+ 
+-       /* RNDIS mode */
+-       if (len > packet_sz) {
+-               musb_writel(musb->ctrl_base,
+-                           RNDIS_REG(cppi41_channel->port_num), len);
+-               /* gen rndis */
+-               cppi41_set_dma_mode(cppi41_channel,
+-                                   EP_MODE_DMA_GEN_RNDIS);
+-
+-               /* auto req */
+-               cppi41_set_autoreq_mode(cppi41_channel,
++       /*
++        * Due to AM335x' Advisory 1.0.13 we are not allowed to transfer more
++        * than max packet size at a time.
++        */
++       if (cppi41_channel->is_tx)
++               use_gen_rndis = 1;
++
++       if (use_gen_rndis) {
++               /* RNDIS mode */
++               if (len > packet_sz) {
++                       musb_writel(musb->ctrl_base,
++                               RNDIS_REG(cppi41_channel->port_num), len);
++                       /* gen rndis */
++                       cppi41_set_dma_mode(cppi41_channel,
++                                       EP_MODE_DMA_GEN_RNDIS);
++
++                       /* auto req */
++                       cppi41_set_autoreq_mode(cppi41_channel,
+                                        EP_MODE_AUTOREG_ALL_NEOP);
+-       } else {
+-               musb_writel(musb->ctrl_base,
+-                           RNDIS_REG(cppi41_channel->port_num), 0);
+-               cppi41_set_dma_mode(cppi41_channel,
+-                                   EP_MODE_DMA_TRANSPARENT);
+-               cppi41_set_autoreq_mode(cppi41_channel,
++               } else {
++                       musb_writel(musb->ctrl_base,
++                                       RNDIS_REG(cppi41_channel->port_num), 0);
++                       cppi41_set_dma_mode(cppi41_channel,
++                                       EP_MODE_DMA_TRANSPARENT);
++                       cppi41_set_autoreq_mode(cppi41_channel,
+                                        EP_MODE_AUTOREG_NONE);
++               }
++       } else {
++               /* fallback mode */
++               cppi41_set_dma_mode(cppi41_channel, EP_MODE_DMA_TRANSPARENT);
++               cppi41_set_autoreq_mode(cppi41_channel, EP_MODE_AUTOREG_NONE);
++               len = min_t(u32, packet_sz, len);
+        }
+-
+        cppi41_channel->prog_len = len;
+        direction = cppi41_channel->is_tx ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
+        dma_desc = dmaengine_prep_slave_single(dc, dma_addr, len, direction,
+@@ -390,6 +451,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
+        dma_desc->callback_param = channel;
+        cppi41_channel->cookie = dma_desc->tx_submit(dma_desc);
+ 
++       save_rx_toggle(cppi41_channel);
+        dma_async_issue_pending(dc);
+        return true;
+ }
+-- 
+1.7.0.4
+
diff --git a/recipes-kernel/linux/linux-ti-staging/0002-ARM-config-Add-HAVE_ARM_SCU-for-AM43XX.patch b/recipes-kernel/linux/linux-ti-staging/0002-ARM-config-Add-HAVE_ARM_SCU-for-AM43XX.patch
new file mode 100644
index 00000000..8137bb30
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti-staging/0002-ARM-config-Add-HAVE_ARM_SCU-for-AM43XX.patch
@@ -0,0 +1,37 @@
+From 5b2aa64ccdeef659a9688730753199ba5b8e60b1 Mon Sep 17 00:00:00 2001
+From: Dave Gerlach <d-gerlach@ti.com>
+Date: Fri, 21 Feb 2014 10:25:33 +0000
+Subject: [PATCH 2/4] ARM: config: Add HAVE_ARM_SCU for AM43XX
+
+CONFIG_HAVE_ARM_SCU only gets selected if CONFIG_SMP is selected in an OMAP
+system however AM43XX needs this option regardless of CONFIG_SMP as it is
+important for controlling power in the SoC. Without this suspend will
+not work as scu_power_mode becomes an empty function.
+
+AM43XX requires SCU CPU Power Status bits for A9 core to be set to off mode
+in order for the MSTANDBY signal to be asserted from the MPU during WFI.
+This signal is used by the PRCM to determine when it is appropriate to
+clock gate the MPU clock domain and also trigger M3_IRQ2 to tell the wkup_m3
+firmware to put the part into the desired sleep more.
+
+Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
+Tested-by: Sekhar Nori <nsekhar@ti.com>
+---
+ arch/arm/mach-omap2/Kconfig |    1 +
+ 1 files changed, 1 insertions(+), 0 deletions(-)
+
+diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
+index 959f6fc..373d576 100644
+--- a/arch/arm/mach-omap2/Kconfig
++++ b/arch/arm/mach-omap2/Kconfig
+@@ -85,6 +85,7 @@ config SOC_AM43XX
+        depends on ARCH_MULTI_V7
+        select CPU_V7
+        select ARCH_OMAP2PLUS
++       select HAVE_ARM_SCU
+        select MULTI_IRQ_HANDLER
+        select ARM_GIC
+        select COMMON_CLK
+-- 
+1.7.0.4
+
diff --git a/recipes-kernel/linux/linux-ti-staging/0003-ARM-OMAP-Kill-warning-in-CPUIDLE-code-with-CONFIG_SM.patch b/recipes-kernel/linux/linux-ti-staging/0003-ARM-OMAP-Kill-warning-in-CPUIDLE-code-with-CONFIG_SM.patch
new file mode 100644
index 00000000..f79b045d
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti-staging/0003-ARM-OMAP-Kill-warning-in-CPUIDLE-code-with-CONFIG_SM.patch
@@ -0,0 +1,49 @@
+From 9b76ff20919fa939eed3fdffe05af8bcf1ec1ac5 Mon Sep 17 00:00:00 2001
+From: Santosh Shilimkar <santosh.shilimkar@ti.com>
+Date: Wed, 12 Feb 2014 16:42:39 -0500
+Subject: [PATCH 3/4] ARM: OMAP: Kill warning in CPUIDLE code with !CONFIG_SMP
+
+for non SMP build, NR_CPUS is 1 and hence the code complains with below
+warnings.
+
+arch/arm/mach-omap2/cpuidle44xx.c:207:8: warning: array subscript is above array bounds [-Warray-bounds]
+arch/arm/mach-omap2/cpuidle44xx.c:212:11: warning: array subscript is above array bounds [-Warray-bounds]
+
+Kill it by making array size fixed.
+
+Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
+---
+ arch/arm/mach-omap2/cpuidle44xx.c |    8 +++++---
+ 1 files changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
+index 4c8982a..5e85f1e 100644
+--- a/arch/arm/mach-omap2/cpuidle44xx.c
++++ b/arch/arm/mach-omap2/cpuidle44xx.c
+@@ -23,6 +23,8 @@
+ #include "prm.h"
+ #include "clockdomain.h"
+ 
++#define MAX_CPUS       2
++
+ /* Machine specific information */
+ struct idle_statedata {
+        u32 cpu_state;
+@@ -48,11 +50,11 @@ static struct idle_statedata omap4_idle_data[] = {
+        },
+ };
+ 
+-static struct powerdomain *mpu_pd, *cpu_pd[NR_CPUS];
+-static struct clockdomain *cpu_clkdm[NR_CPUS];
++static struct powerdomain *mpu_pd, *cpu_pd[MAX_CPUS];
++static struct clockdomain *cpu_clkdm[MAX_CPUS];
+ 
+ static atomic_t abort_barrier;
+-static bool cpu_done[NR_CPUS];
++static bool cpu_done[MAX_CPUS];
+ static struct idle_statedata *state_ptr = &omap4_idle_data[0];
+ 
+ /* Private functions */
+-- 
+1.7.0.4
+
diff --git a/recipes-kernel/linux/linux-ti-staging/0004-Not-for-merge-ARM-config-omap-Disable-SMP-for-AM335x.patch b/recipes-kernel/linux/linux-ti-staging/0004-Not-for-merge-ARM-config-omap-Disable-SMP-for-AM335x.patch
new file mode 100644
index 00000000..b01c4d0c
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti-staging/0004-Not-for-merge-ARM-config-omap-Disable-SMP-for-AM335x.patch
@@ -0,0 +1,43 @@
+From 89783143b64210e8f159fd875b23aa9af1fd51b0 Mon Sep 17 00:00:00 2001
+From: Santosh Shilimkar <santosh.shilimkar@ti.com>
+Date: Thu, 13 Feb 2014 08:52:41 -0500
+Subject: [PATCH 4/4] Not-for-merge: ARM: config: omap: Disable SMP for AM335x build
+
+SMP and SMP_ON_UP introduces some extra barriers and code many fast paths
+including kernel lock functions.
+
+Performance sensitive usecases like networking gets impacted because of this.
+In typical production kernel which is targeted for single core device
+like AM335x family, you don't want to take this hit.
+
+Ideally one should just create a device specific config feed as done by all
+typical distro's. Other option is to apply this specifically during build
+time using recipe.
+
+Whichever option, one definitely don't want this overhead for performance
+critical usecases.
+
+Disabling SMP in the build introduces one warining in cpuidle44xx.c driver
+and fix is included in the series
+
+Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
+---
+ arch/arm/configs/omap2plus_defconfig |    2 --
+ 1 files changed, 0 insertions(+), 2 deletions(-)
+
+diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
+index 3975b08..cfbc2d0 100644
+--- a/arch/arm/configs/omap2plus_defconfig
++++ b/arch/arm/configs/omap2plus_defconfig
+@@ -36,8 +36,6 @@ CONFIG_OMAP4_ERRATA_I688=y
+ CONFIG_ARM_THUMBEE=y
+ CONFIG_ARM_ERRATA_411920=y
+ CONFIG_PCIE_DRA7XX=y
+-CONFIG_SMP=y
+-CONFIG_NR_CPUS=2
+ CONFIG_PREEMPT=y
+ CONFIG_CMA=y
+ CONFIG_ZBOOT_ROM_TEXT=0x0
+-- 
+1.7.0.4
+
diff --git a/recipes-kernel/linux/linux-ti-staging_3.12.bb b/recipes-kernel/linux/linux-ti-staging_3.12.bb
index 0b4815ed..32cc5c5d 100644
--- a/recipes-kernel/linux/linux-ti-staging_3.12.bb
+++ b/recipes-kernel/linux/linux-ti-staging_3.12.bb
@@ -40,9 +40,18 @@ SRCREV = "d5e4bfd196e114c885c5c42cf0a7b3edc7e54829"
 PV = "3.12.10"
 
 # Append to the MACHINE_KERNEL_PR so that a new SRCREV will cause a rebuild
-MACHINE_KERNEL_PR_append = "g+gitr${SRCPV}"
+MACHINE_KERNEL_PR_append = "h+gitr${SRCPV}"
 PR = "${MACHINE_KERNEL_PR}"
 
 SRC_URI = "git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git;protocol=git;branch=${BRANCH} \
            file://defconfig \
           "
+
+# Latest critical fixes
+SRC_URI += "file://0001-Revert-usb-musb-musb_cppi41-Revert-the-Advisory-1.0..patch \
+            file://0002-ARM-config-Add-HAVE_ARM_SCU-for-AM43XX.patch \
+            file://0003-ARM-OMAP-Kill-warning-in-CPUIDLE-code-with-CONFIG_SM.patch \
+            "
+
+SRC_URI_append_ti33x = "file://0004-Not-for-merge-ARM-config-omap-Disable-SMP-for-AM335x.patch"
+SRC_URI_append_ti43x = "file://0004-Not-for-merge-ARM-config-omap-Disable-SMP-for-AM335x.patch"