Bindings/powerpc/fsl/interlaken-lac.txt

   1 ===============================================================================
   2 Freescale Interlaken Look-Aside Controller Device Bindings
   3 Copyright 2012 Freescale Semiconductor Inc.
   4
   5 CONTENTS
   6   - Interlaken Look-Aside Controller (LAC) Node
   7   - Example LAC Node
   8   - Interlaken Look-Aside Controller (LAC) Software Portal Node
   9   - Interlaken Look-Aside Controller (LAC) Software Portal Child Nodes
  10   - Example LAC SWP Node with Child Nodes
  11
  12 ==============================================================================
  13 Interlaken Look-Aside Controller (LAC) Node
  14
  15 DESCRIPTION
  16
  17 The Interlaken is a narrow, high speed channelized chip-to-chip interface. To
  18 facilitate interoperability between a data path device and a look-aside
  19 co-processor, the Interlaken Look-Aside protocol is defined for short
  20 transaction-related transfers. Although based on the Interlaken protocol,
  21 Interlaken Look-Aside is not directly compatible with Interlaken and can be
  22 considered a different operation mode.
  23
  24 The Interlaken LA controller connects internal platform to Interlaken serial
  25 interface. It accepts LA command through software portals, which are system
  26 memory mapped 4KB spaces. The LA commands are then translated into the
  27 Interlaken control words and data words, which are sent on TX side to TCAM
  28 through SerDes lanes.
  29
  30 There are two 4KiB spaces defined within the LAC global register memory map.
  31 There is a full register set at 0x0000-0x0FFF (also known as the "hypervisor"
  32 version), and a subset at 0x1000-0x1FFF.  The former is a superset of the
  33 latter, and includes certain registers that should not be accessible to
  34 partitioned software.  Separate nodes are used for each region, with a phandle
  35 linking the hypervisor node to the normal operating node.
  36
  37 PROPERTIES
  38
  39   - compatible
  40         Usage: required
  41         Value type: <string>
  42         Definition: Must include "fsl,interlaken-lac". This represents only
  43                 those LAC CCSR registers not protected in partitioned
  44                 software. The version of the device is determined by the LAC
  45                 IP Block Revision Register (IPBRR0) at offset 0x0BF8.
  46
  47                 Table of correspondences between IPBRR0 values and example
  48                 chips:
  49                         Value           Device
  50                         -----------     -------
  51                         0x02000100      T4240
  52
  53                 The Hypervisor node has a different compatible. It must include
  54                 "fsl,interlaken-lac-hv". This node represents the protected
  55                 LAC register space and is required except inside a partition
  56                 where access to the hypervisor node is to be denied.
  57
  58   - fsl,non-hv-node
  59         Usage: required in "fsl,interlaken-lac-hv"
  60         Value type: <phandle>
  61         Definition: Points to the non-protected LAC CCSR mapped register space
  62                 node.
  63
  64   - reg
  65         Usage: required
  66         Value type: <prop-encoded-array>
  67         Definition: A standard property. The first resource represents the
  68                 Interlaken LAC configuration registers.
  69
  70   - interrupts:
  71         Usage: required in non-hv node only
  72         Value type: <prop-encoded-array>
  73         Definition: Interrupt mapping for Interlaken LAC error IRQ.
  74
  75 EXAMPLE
  76         lac: lac@229000 {
  77                 compatible = "fsl,interlaken-lac"
  78                 reg = <0x229000 0x1000>;
  79                 interrupts = <16 2 1 18>;
  80         };
  81
  82         lac-hv@228000 {
  83                 compatible = "fsl,interlaken-lac-hv"
  84                 reg = <0x228000 0x1000>;
  85                 fsl,non-hv-node = <&lac>;
  86         };
  87
  88 ===============================================================================
  89 Interlaken Look-Aside Controller (LAC) Software Portal Container Node
  90
  91 DESCRIPTION
  92 The Interlaken Look-Aside Controller (LAC) utilizes Software Portals to accept
  93 Interlaken Look-Aside (ILA) commands. The Interlaken LAC software portal
  94 memory map occupies 128KB of memory space. The software portal memory space is
  95 intended to be cache-enabled. WIMG for each software space is required to be
  96 0010 if stashing is enabled; otherwise, WIMG can be 0000 or 0010.
  97
  98 PROPERTIES
  99
 100   - #address-cells
 101         Usage: required
 102         Value type: <u32>
 103         Definition: A standard property. Must have a value of 1.
 104
 105   - #size-cells
 106         Usage: required
 107         Value type: <u32>
 108         Definition: A standard property. Must have a value of 1.
 109
 110   - compatible
 111         Usage: required
 112         Value type: <string>
 113         Definition: Must include "fsl,interlaken-lac-portals"
 114
 115   - ranges
 116         Usage: required
 117         Value type: <prop-encoded-array>
 118         Definition: A standard property. Specifies the address and length
 119                 of the LAC portal memory space.
 120
 121 ===============================================================================
 122 Interlaken Look-Aside Controller (LAC) Software Portals Child Nodes
 123
 124 DESCRIPTION
 125 There are up to 24 available software portals with each software portal
 126 requiring 4KB of consecutive memory within the software portal memory mapped
 127 space.
 128
 129 PROPERTIES
 130
 131   - compatible
 132         Usage: required
 133         Value type: <string>
 134         Definition: Must include "fsl,interlaken-lac-portal-vX.Y" where X is
 135                 the Major version (IP_MJ) found in the LAC IP Block Revision
 136                 Register (IPBRR0), at offset 0x0BF8, and Y is the Minor version
 137                 (IP_MN).
 138
 139                 Table of correspondences between version values and example chips:
 140                     Value       Device
 141                     ------      -------
 142                       1.0       T4240
 143
 144   - reg
 145         Usage: required
 146         Value type: <prop-encoded-array>
 147         Definition: A standard property.  The first resource represents the
 148                 Interlaken LAC software portal registers.
 149
 150   - fsl,liodn
 151         Value type: <u32>
 152         Definition: The logical I/O device number (LIODN) for this device.  The
 153                 LIODN is a number expressed by this device and used to perform
 154                 look-ups in the IOMMU (PAMU) address table when performing
 155                 DMAs. This property is automatically added by u-boot.
 156
 157 ===============================================================================
 158 EXAMPLE
 159
 160 lac-portals {
 161         #address-cells = <0x1>;
 162         #size-cells = <0x1>;
 163         compatible = "fsl,interlaken-lac-portals";
 164         ranges = <0x0 0xf 0xf4400000 0x20000>;
 165
 166         lportal0: lac-portal@0 {
 167                 compatible = "fsl,interlaken-lac-portal-v1.0";
 168                 fsl,liodn = <0x204>;
 169                 reg = <0x0 0x1000>;
 170         };
 171
 172         lportal1: lac-portal@1000 {
 173                 compatible = "fsl,interlaken-lac-portal-v1.0";
 174                 fsl,liodn = <0x205>;
 175                 reg = <0x1000 0x1000>;
 176         };
 177
 178         lportal2: lac-portal@2000 {
 179                 compatible = "fsl,interlaken-lac-portal-v1.0";
 180                 fsl,liodn = <0x206>;
 181                 reg = <0x2000 0x1000>;
 182         };
 183
 184         lportal3: lac-portal@3000 {
 185                 compatible = "fsl,interlaken-lac-portal-v1.0";
 186                 fsl,liodn = <0x207>;
 187                 reg = <0x3000 0x1000>;
 188         };
 189
 190         lportal4: lac-portal@4000 {
 191                 compatible = "fsl,interlaken-lac-portal-v1.0";
 192                 fsl,liodn = <0x208>;
 193                 reg = <0x4000 0x1000>;
 194         };
 195
 196         lportal5: lac-portal@5000 {
 197                 compatible = "fsl,interlaken-lac-portal-v1.0";
 198                 fsl,liodn = <0x209>;
 199                 reg = <0x5000 0x1000>;
 200         };
 201
 202         lportal6: lac-portal@6000 {
 203                 compatible = "fsl,interlaken-lac-portal-v1.0";
 204                 fsl,liodn = <0x20A>;
 205                 reg = <0x6000 0x1000>;
 206         };
 207
 208         lportal7: lac-portal@7000 {
 209                 compatible = "fsl,interlaken-lac-portal-v1.0";
 210                 fsl,liodn = <0x20B>;
 211                 reg = <0x7000 0x1000>;
 212         };
 213
 214         lportal8: lac-portal@8000 {
 215                 compatible = "fsl,interlaken-lac-portal-v1.0";
 216                 fsl,liodn = <0x20C>;
 217                 reg = <0x8000 0x1000>;
 218         };
 219
 220         lportal9: lac-portal@9000 {
 221                 compatible = "fsl,interlaken-lac-portal-v1.0";
 222                 fsl,liodn = <0x20D>;
 223                 reg = <0x9000 0x1000>;
 224         };
 225
 226         lportal10: lac-portal@a000 {
 227                 compatible = "fsl,interlaken-lac-portal-v1.0";
 228                 fsl,liodn = <0x20E>;
 229                 reg = <0xA000 0x1000>;
 230         };
 231
 232         lportal11: lac-portal@b000 {
 233                 compatible = "fsl,interlaken-lac-portal-v1.0";
 234                 fsl,liodn = <0x20F>;
 235                 reg = <0xB000 0x1000>;
 236         };
 237
 238         lportal12: lac-portal@c000 {
 239                 compatible = "fsl,interlaken-lac-portal-v1.0";
 240                 fsl,liodn = <0x210>;
 241                 reg = <0xC000 0x1000>;
 242         };
 243
 244         lportal13: lac-portal@d000 {
 245                 compatible = "fsl,interlaken-lac-portal-v1.0";
 246                 fsl,liodn = <0x211>;
 247                 reg = <0xD000 0x1000>;
 248         };
 249
 250         lportal14: lac-portal@e000 {
 251                 compatible = "fsl,interlaken-lac-portal-v1.0";
 252                 fsl,liodn = <0x212>;
 253                 reg = <0xE000 0x1000>;
 254         };
 255
 256         lportal15: lac-portal@f000 {
 257                 compatible = "fsl,interlaken-lac-portal-v1.0";
 258                 fsl,liodn = <0x213>;
 259                 reg = <0xF000 0x1000>;
 260         };
 261
 262         lportal16: lac-portal@10000 {
 263                 compatible = "fsl,interlaken-lac-portal-v1.0";
 264                 fsl,liodn = <0x214>;
 265                 reg = <0x10000 0x1000>;
 266         };
 267
 268         lportal17: lac-portal@11000 {
 269                 compatible = "fsl,interlaken-lac-portal-v1.0";
 270                 fsl,liodn = <0x215>;
 271                 reg = <0x11000 0x1000>;
 272         };
 273
 274         lportal8: lac-portal@1200 {
 275                 compatible = "fsl,interlaken-lac-portal-v1.0";
 276                 fsl,liodn = <0x216>;
 277                 reg = <0x12000 0x1000>;
 278         };
 279
 280         lportal19: lac-portal@13000 {
 281                 compatible = "fsl,interlaken-lac-portal-v1.0";
 282                 fsl,liodn = <0x217>;
 283                 reg = <0x13000 0x1000>;
 284         };
 285
 286         lportal20: lac-portal@14000 {
 287                 compatible = "fsl,interlaken-lac-portal-v1.0";
 288                 fsl,liodn = <0x218>;
 289                 reg = <0x14000 0x1000>;
 290         };
 291
 292         lportal21: lac-portal@15000 {
 293                 compatible = "fsl,interlaken-lac-portal-v1.0";
 294                 fsl,liodn = <0x219>;
 295                 reg = <0x15000 0x1000>;
 296         };
 297
 298         lportal22: lac-portal@16000 {
 299                 compatible = "fsl,interlaken-lac-portal-v1.0";
 300                 fsl,liodn = <0x21A>;
 301                 reg = <0x16000 0x1000>;
 302         };
 303
 304         lportal23: lac-portal@17000 {
 305                 compatible = "fsl,interlaken-lac-portal-v1.0";
 306                 fsl,liodn = <0x21B>;
 307                 reg = <0x17000 0x1000>;
 308         };
 309 };