- 22 Mar, 2020 1 commit
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Varun Wadekar authored
This patch includes the missing stdbool.h header from flowctrl.h and bpmp_ivc.c files. Change-Id: If60d19142b1cb8ae663fbdbdf1ffe45cbbdbc1b2 Signed-off-by:Varun Wadekar <vwadekar@nvidia.com>
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- 23 Jan, 2020 1 commit
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Varun Wadekar authored
This patch fixes the header file paths to include debug.h from the right location. Signed-off-by:
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- 23 Jan, 2019 1 commit
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Varun Wadekar authored
This patch adds the driver to communicate with the BPMP firmware on Tegra SoCs, starting Tegra186. BPMP firmware is responsible for clock enable/ disable requests, module resets among other things. MRQ is short for Message ReQuest. This is the general purpose, multi channel messaging protocol that is widely used to communicate with BPMP. This is further divided into a common high level protocol and a peer-specific low level protocol. The higher level protocol specifies the peer identification, channel definition and allocation, message structure, message semantics and message dispatch process whereas the lower level protocol defines actual message transfer implementation details. Currently, BPMP supports two lower level protocols - Token Mail Operations (TMO), IVC Mail Operations (IMO). This driver implements the IMO protocol. IMO is implemented using the IVC (Inter-VM Communication) protocol which is a lockless, shared memory messaging queue management protocol. The IVC peer is expected to perform the following as part of establishing a connection with BPMP. 1. Initialize the channels with tegra_ivc_init() or its equivalent. 2. Reset the channel with tegra_ivc_channel_reset. The peer should also ensure that BPMP is notified via the doorbell. 3. Poll until the channel connection is established [tegra_ivc_channel_notified() return 0]. Interrupt BPMP with doorbell each time after tegra_ivc_channel_notified() return non zero. The IPC driver currently supports reseting the GPCDMAand XUSB_PADCTL hardware blocks. In future, more hardware blocks would be supported. Change-Id: I52a4bd3a853de6c4fa410904b6614ff1c63df364 Signed-off-by:
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