1*4882a593Smuzhiyun* UCTL SATA controller glue 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunUCTL is the bridge unit between the I/O interconnect (an internal bus) 4*4882a593Smuzhiyunand the SATA AHCI host controller (UAHC). It performs the following functions: 5*4882a593Smuzhiyun - provides interfaces for the applications to access the UAHC AHCI 6*4882a593Smuzhiyun registers on the CN71XX I/O space. 7*4882a593Smuzhiyun - provides a bridge for UAHC to fetch AHCI command table entries and data 8*4882a593Smuzhiyun buffers from Level 2 Cache. 9*4882a593Smuzhiyun - posts interrupts to the CIU. 10*4882a593Smuzhiyun - contains registers that: 11*4882a593Smuzhiyun - control the behavior of the UAHC 12*4882a593Smuzhiyun - control the clock/reset generation to UAHC 13*4882a593Smuzhiyun - control endian swapping for all UAHC registers and DMA accesses 14*4882a593Smuzhiyun 15*4882a593SmuzhiyunProperties: 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun- compatible: "cavium,octeon-7130-sata-uctl" 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun Compatibility with the cn7130 SOC. 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun- reg: The base address of the UCTL register bank. 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun- #address-cells, #size-cells, ranges and dma-ranges must be present and hold 24*4882a593Smuzhiyun suitable values to map all child nodes. 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunExample: 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun uctl@118006c000000 { 29*4882a593Smuzhiyun compatible = "cavium,octeon-7130-sata-uctl"; 30*4882a593Smuzhiyun reg = <0x11800 0x6c000000 0x0 0x100>; 31*4882a593Smuzhiyun ranges; /* Direct mapping */ 32*4882a593Smuzhiyun dma-ranges; 33*4882a593Smuzhiyun #address-cells = <2>; 34*4882a593Smuzhiyun #size-cells = <2>; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun sata: sata@16c0000000000 { 37*4882a593Smuzhiyun compatible = "cavium,octeon-7130-ahci"; 38*4882a593Smuzhiyun reg = <0x16c00 0x00000000 0x0 0x200>; 39*4882a593Smuzhiyun interrupt-parent = <&cibsata>; 40*4882a593Smuzhiyun interrupts = <2 4>; /* Bit: 2, level */ 41*4882a593Smuzhiyun }; 42*4882a593Smuzhiyun }; 43