SPI Registers: Difference between revisions
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! Offset | ! Offset | ||
! Size | ! Size | ||
! Name | |||
! Description | ! Description | ||
|- | |- | ||
| 0x00 | | 0x00 | ||
| 4 | | 4 | ||
| SPI_RXFIFO | |||
| Read FIFO | | Read FIFO | ||
|- | |- | ||
| 0x04 | | 0x04 | ||
| 4 | | 4 | ||
| SPI_TXFIFO | |||
| Write FIFO | | Write FIFO | ||
|- | |- | ||
| 0x08 | | 0x08 | ||
| 4 | | 4 | ||
| SPI_CTL | |||
| Configuration | | Configuration | ||
|- | |||
| 0x0C | |||
| 4 | |||
| SPI_INTCTL | |||
| Interrupt control? | |||
|- | |- | ||
| 0x10 | | 0x10 | ||
| 4 | | 4 | ||
| SPI_STATUS | |||
| Start transfer (write 0b1), cancel transfer(write 0b0), transfer busy (reads bit0 = 0)? | | Start transfer (write 0b1), cancel transfer(write 0b0), transfer busy (reads bit0 = 0)? | ||
|- | |||
| 0x14 | |||
| 4 | |||
| SPI_DMACTL | |||
| ?? | |||
|- | |- | ||
| 0x18 | | 0x18 | ||
| 4 | | 4 | ||
| ?? | |||
| Start transfer (bit 0 or 1), transfer direction (bit 0 or 1)? | | Start transfer (bit 0 or 1), transfer direction (bit 0 or 1)? | ||
|- | |||
| 0x20 | |||
| 4 | |||
| ?? | |||
| | |||
|- | |- | ||
| 0x24 | | 0x24 | ||
| 4 | | 4 | ||
| | | SPI_INT_STATUS | ||
| Interrupt status/clear. Bit[9] = RX FIFO not empty interrupt. | |||
|- | |- | ||
| 0x28 | | 0x28 | ||
| 4 | | 4 | ||
| Number of available bytes to read from the FIFO | | SPI_RXFIFO_STATUS | ||
| Number of available bytes to read from the RX FIFO | |||
|- | |- | ||
| 0x2C | | 0x2C | ||
| 4 | | 4 | ||
| Number of pending bytes in the write the FIFO (maximum = 0x7F) | | SPI_TXFIFO_STATUS | ||
| Number of pending bytes in the write the TX FIFO (maximum = 0x7F) | |||
|} | |} | ||
== Notes == | |||
Registers seem to be very similar to https://github.com/torvalds/linux/blob/master/drivers/spi/spi-sun4i.c | |||
Latest revision as of 13:56, 29 May 2021
MMIO Interfaces
| Name | Physical address |
|---|---|
| SceSpi0Reg (SceSyscon) | 0xE0A00000 |
| SceSpi1Reg (SceMotionDev) | 0xE0A10000 |
| SceSpi2Reg (SceOled, SceLcd) | 0xE0A20000 |
Registers
| Offset | Size | Name | Description |
|---|---|---|---|
| 0x00 | 4 | SPI_RXFIFO | Read FIFO |
| 0x04 | 4 | SPI_TXFIFO | Write FIFO |
| 0x08 | 4 | SPI_CTL | Configuration |
| 0x0C | 4 | SPI_INTCTL | Interrupt control? |
| 0x10 | 4 | SPI_STATUS | Start transfer (write 0b1), cancel transfer(write 0b0), transfer busy (reads bit0 = 0)? |
| 0x14 | 4 | SPI_DMACTL | ?? |
| 0x18 | 4 | ?? | Start transfer (bit 0 or 1), transfer direction (bit 0 or 1)? |
| 0x20 | 4 | ?? | |
| 0x24 | 4 | SPI_INT_STATUS | Interrupt status/clear. Bit[9] = RX FIFO not empty interrupt. |
| 0x28 | 4 | SPI_RXFIFO_STATUS | Number of available bytes to read from the RX FIFO |
| 0x2C | 4 | SPI_TXFIFO_STATUS | Number of pending bytes in the write the TX FIFO (maximum = 0x7F) |
Notes
Registers seem to be very similar to https://github.com/torvalds/linux/blob/master/drivers/spi/spi-sun4i.c