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Commit 917809e2 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Greg Kroah-Hartman
Browse files

slimbus: ngd: Add qcom SLIMBus NGD driver 



This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD)
controller driver.
This is light-weight SLIMBus controller driver responsible for
communicating with slave HW directly over the bus using messaging
interface, and communicating with master component residing on ADSP
for bandwidth and data-channel management

Based on intial work from
Karthikeyan Ramasubramanian <kramasub@codeaurora.org> and
Sagar Dharia <sdharia@codeaurora.org>

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: default avatarCraig Tatlor <ctatlor97@gmail.com>
Reviewed-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 992d3615

drivers/slimbus/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -20,4 +20,15 @@ config SLIM_QCOM_CTRL 
	  Select driver if Qualcomm's SLIMbus Manager Component is

	  programmed using Linux kernel.



config SLIM_QCOM_NGD_CTRL

	tristate "Qualcomm SLIMbus Satellite Non-Generic Device Component"

	depends on QCOM_QMI_HELPERS

	depends on HAS_IOMEM && DMA_ENGINE

	help

	  Select driver if Qualcomm's SLIMbus Satellite Non-Generic Device

	  Component is programmed using Linux kernel.

	  This is light-weight slimbus controller driver responsible for

	  communicating with slave HW directly over the bus using messaging

	  interface, and communicating with master component residing on ADSP

	  for bandwidth and data-channel management.

endif

drivers/slimbus/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -8,3 +8,6 @@ slimbus-y := core.o messaging.o sched.o 
#Controllers

obj-$(CONFIG_SLIM_QCOM_CTRL)		+= slim-qcom-ctrl.o

slim-qcom-ctrl-y			:= qcom-ctrl.o



obj-$(CONFIG_SLIM_QCOM_NGD_CTRL)	+= slim-qcom-ngd-ctrl.o

slim-qcom-ngd-ctrl-y			:= qcom-ngd-ctrl.o

drivers/slimbus/qcom-ngd-ctrl.c

0 → 100644
+1381 −0

File added.

Preview size limit exceeded, changes collapsed.

drivers/slimbus/slimbus.h

+8 −0
Original line number Diff line number Diff line
@@ -17,6 +17,8 @@ 


/* SLIMbus message types. Related to interpretation of message code. */

#define SLIM_MSG_MT_CORE			0x0

#define SLIM_MSG_MT_DEST_REFERRED_USER		0x2

#define SLIM_MSG_MT_SRC_REFERRED_USER		0x6



/*

 * SLIM Broadcast header format
@@ -48,6 +50,12 @@ 
#define SLIM_MSG_MC_NEXT_PAUSE_CLOCK             0x4A

#define SLIM_MSG_MC_RECONFIGURE_NOW              0x5F



/*

 * Clock pause flag to indicate that the reconfig message

 * corresponds to clock pause sequence

 */

#define SLIM_MSG_CLK_PAUSE_SEQ_FLG		(1U << 8)



/* Clock pause values per SLIMbus spec */

#define SLIM_CLK_FAST				0

#define SLIM_CLK_CONST_PHASE			1