The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/ata/ahci-ceva.txt

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    1 Binding for CEVA AHCI SATA Controller
    2 
    3 Required properties:
    4   - reg: Physical base address and size of the controller's register area.
    5   - compatible: Compatibility string. Must be 'ceva,ahci-1v84'.
    6   - clocks: Input clock specifier. Refer to common clock bindings.
    7   - interrupts: Interrupt specifier. Refer to interrupt binding.
    8   - ceva,p0-cominit-params: OOB timing value for COMINIT parameter for port 0.
    9   - ceva,p1-cominit-params: OOB timing value for COMINIT parameter for port 1.
   10                         The fields for the above parameter must be as shown below:
   11                         ceva,pN-cominit-params = /bits/ 8 <CIBGMN CIBGMX CIBGN CINMP>;
   12                         CINMP : COMINIT Negate Minimum Period.
   13                         CIBGN : COMINIT Burst Gap Nominal.
   14                         CIBGMX: COMINIT Burst Gap Maximum.
   15                         CIBGMN: COMINIT Burst Gap Minimum.
   16   - ceva,p0-comwake-params: OOB timing value for COMWAKE parameter for port 0.
   17   - ceva,p1-comwake-params: OOB timing value for COMWAKE parameter for port 1.
   18                         The fields for the above parameter must be as shown below:
   19                         ceva,pN-comwake-params = /bits/ 8 <CWBGMN CWBGMX CWBGN CWNMP>;
   20                         CWBGMN: COMWAKE Burst Gap Minimum.
   21                         CWBGMX: COMWAKE Burst Gap Maximum.
   22                         CWBGN: COMWAKE Burst Gap Nominal.
   23                         CWNMP: COMWAKE Negate Minimum Period.
   24   - ceva,p0-burst-params: Burst timing value for COM parameter for port 0.
   25   - ceva,p1-burst-params: Burst timing value for COM parameter for port 1.
   26                         The fields for the above parameter must be as shown below:
   27                         ceva,pN-burst-params = /bits/ 8 <BMX BNM SFD PTST>;
   28                         BMX: COM Burst Maximum.
   29                         BNM: COM Burst Nominal.
   30                         SFD: Signal Failure Detection value.
   31                         PTST: Partial to Slumber timer value.
   32   - ceva,p0-retry-params: Retry interval timing value for port 0.
   33   - ceva,p1-retry-params: Retry interval timing value for port 1.
   34                         The fields for the above parameter must be as shown below:
   35                         ceva,pN-retry-params = /bits/ 16 <RIT RCT>;
   36                         RIT:  Retry Interval Timer.
   37                         RCT:  Rate Change Timer.
   38 
   39 Optional properties:
   40   - ceva,broken-gen2: limit to gen1 speed instead of gen2.
   41   - phys: phandle for the PHY device
   42   - resets: phandle to the reset controller for the SATA IP
   43 
   44 Examples:
   45         ahci@fd0c0000 {
   46                 compatible = "ceva,ahci-1v84";
   47                 reg = <0xfd0c0000 0x200>;
   48                 interrupt-parent = <&gic>;
   49                 interrupts = <0 133 4>;
   50                 clocks = <&clkc SATA_CLK_ID>;
   51                 ceva,p0-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
   52                 ceva,p0-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
   53                 ceva,p0-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
   54                 ceva,p0-retry-params = /bits/ 16 <0x0216 0x7F06>;
   55 
   56                 ceva,p1-cominit-params = /bits/ 8 <0x0F 0x25 0x18 0x29>;
   57                 ceva,p1-comwake-params = /bits/ 8 <0x04 0x0B 0x08 0x0F>;
   58                 ceva,p1-burst-params = /bits/ 8 <0x0A 0x08 0x4A 0x06>;
   59                 ceva,p1-retry-params = /bits/ 16 <0x0216 0x7F06>;
   60                 ceva,broken-gen2;
   61                 phys = <&psgtr 1 PHY_TYPE_SATA 1 1>;
   62                 resets = <&zynqmp_reset ZYNQMP_RESET_SATA>;
   63         };

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