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The I2C controller of the Aspeed AST2500 and AST2600 SoCs supports DMA transfers to and from DRAM. A pair of registers defines the buffer address and the length of the DMA transfer. The address should be aligned on 4 bytes and the maximum length should not exceed 4K. The receive or transmit DMA transfer can then be initiated with specific bits in the Command/Status register of the controller. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Tested-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Signed-off-by: Cédric Le Goater <clg@kaod.org> Message-id: 20191119141211.25716-5-clg@kaod.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org> |
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| acpi | ||
| adc | ||
| arm | ||
| audio | ||
| block | ||
| char | ||
| core | ||
| cpu | ||
| cris | ||
| display | ||
| dma | ||
| firmware | ||
| gpio | ||
| hyperv | ||
| i2c | ||
| i386 | ||
| ide | ||
| input | ||
| intc | ||
| ipack | ||
| ipmi | ||
| isa | ||
| kvm | ||
| lm32 | ||
| m68k | ||
| mem | ||
| mips | ||
| misc | ||
| net | ||
| nubus | ||
| nvram | ||
| pci | ||
| pci-bridge | ||
| pci-host | ||
| ppc | ||
| rdma | ||
| riscv | ||
| rtc | ||
| s390x | ||
| scsi | ||
| sd | ||
| semihosting | ||
| sh4 | ||
| southbridge | ||
| sparc | ||
| ssi | ||
| timer | ||
| tricore | ||
| unicore32 | ||
| usb | ||
| vfio | ||
| virtio | ||
| watchdog | ||
| xen | ||
| xtensa | ||
| boards.h | ||
| bt.h | ||
| elf_ops.h | ||
| empty_slot.h | ||
| fw-path-provider.h | ||
| hotplug.h | ||
| hw.h | ||
| ide.h | ||
| irq.h | ||
| loader-fit.h | ||
| loader.h | ||
| nmi.h | ||
| or-irq.h | ||
| pcmcia.h | ||
| platform-bus.h | ||
| ptimer.h | ||
| qdev-core.h | ||
| qdev-dma.h | ||
| qdev-properties.h | ||
| register.h | ||
| registerfields.h | ||
| stream.h | ||
| sysbus.h | ||
| usb.h | ||