Documentation/devicetree/bindings/usb/am33xx-usb.txt

   1   AM33xx MUSB
   2 ~~~~~~~~~~~~~~~
   3 - compatible: ti,am33xx-usb
   4 - reg: offset and length of the usbss register sets
   5 - ti,hwmods : must be "usb_otg_hs"
   6
   7 The glue layer contains multiple child nodes. It is required to have
   8 at least a control module node, USB node and a PHY node. The second USB
   9 node and its PHY node are optional. The DMA node is also optional.
  10
  11 Reset module
  12 ~~~~~~~~~~~~
  13 - compatible: ti,am335x-usb-ctrl-module
  14 - reg: offset and length of the "USB control registers" in the "Control
  15   Module" block. A second offset and length for the USB wake up control
  16   in the same memory block.
  17 - reg-names: "phy_ctrl" for the "USB control registers" and "wakeup" for
  18   the USB wake up control register.
  19
  20 USB PHY
  21 ~~~~~~~
  22 compatible: ti,am335x-usb-phy
  23 reg: offset and length of the "USB PHY" register space
  24 ti,ctrl_mod: reference to the "reset module" node
  25 reg-names: phy
  26 The PHY should have a "phy" alias numbered properly in the alias
  27 node.
  28
  29 USB
  30 ~~~
  31 - compatible: ti,musb-am33xx
  32 - reg: offset and length of "USB Controller Registers", and offset and
  33   length of "USB Core" register space.
  34 - reg-names: control for the ""USB Controller Registers" and "mc" for
  35   "USB Core" register space
  36 - interrupts: USB interrupt number
  37 - interrupt-names: mc
  38 - dr_mode: Should be one of "host", "peripheral" or "otg".
  39 - mentor,multipoint: Should be "1" indicating the musb controller supports
  40   multipoint. This is a MUSB configuration-specific setting.
  41 - mentor,num-eps: Specifies the number of endpoints. This is also a
  42   MUSB configuration-specific setting. Should be set to "16"
  43 - mentor,ram-bits: Specifies the ram address size. Should be set to "12"
  44 - mentor,power: Should be "500". This signifies the controller can supply up to
  45   500mA when operating in host mode.
  46 - phys: reference to the USB phy
  47 - dmas: specifies the dma channels
  48 - dma-names: specifies the names of the channels. Use "rxN" for receive
  49   and "txN" for transmit endpoints. N specifies the endpoint number.
  50
  51 The controller should have an "usb" alias numbered properly in the alias
  52 node.
  53
  54 DMA
  55 ~~~
  56 - compatible: ti,am3359-cppi41
  57 - reg: offset and length of the following register spaces: USBSS, USB
  58   CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager
  59 - reg-names: glue, controller, scheduler, queuemgr
  60 - #dma-cells: should be set to 2. The first number represents the
  61   endpoint number (0 … 14 for endpoints 1 … 15 on instance 0 and 15 … 29
  62   for endpoints 1 … 15 on instance 1). The second number is 0 for RX and
  63   1 for TX transfers.
  64 - #dma-channels: should be set to 30 representing the 15 endpoints for
  65   each USB instance.
  66
  67 Example:
  68 ~~~~~~~~
  69 The following example contains all the nodes as used on am335x-evm:
  70
  71 aliases {
  72         usb0 = &usb0;
  73         usb1 = &usb1;
  74         phy0 = &usb0_phy;
  75         phy1 = &usb1_phy;
  76 };
  77
  78 usb: usb@47400000 {
  79         compatible = "ti,am33xx-usb";
  80         reg = <0x47400000 0x1000>;
  81         ranges;
  82         #address-cells = <1>;
  83         #size-cells = <1>;
  84         ti,hwmods = "usb_otg_hs";
  85
  86         ctrl_mod: control@44e10000 {
  87                 compatible = "ti,am335x-usb-ctrl-module";
  88                 reg = <0x44e10620 0x10
  89                         0x44e10648 0x4>;
  90                 reg-names = "phy_ctrl", "wakeup";
  91         };
  92
  93         usb0_phy: usb-phy@47401300 {
  94                 compatible = "ti,am335x-usb-phy";
  95                 reg = <0x47401300 0x100>;
  96                 reg-names = "phy";
  97                 ti,ctrl_mod = <&ctrl_mod>;
  98         };
  99
 100         usb0: usb@47401000 {
 101                 compatible = "ti,musb-am33xx";
 102                 reg = <0x47401400 0x400
 103                         0x47401000 0x200>;
 104                 reg-names = "mc", "control";
 105
 106                 interrupts = <18>;
 107                 interrupt-names = "mc";
 108                 dr_mode = "otg"
 109                 mentor,multipoint = <1>;
 110                 mentor,num-eps = <16>;
 111                 mentor,ram-bits = <12>;
 112                 mentor,power = <500>;
 113                 phys = <&usb0_phy>;
 114
 115                 dmas = <&cppi41dma  0 0 &cppi41dma  1 0
 116                         &cppi41dma  2 0 &cppi41dma  3 0
 117                         &cppi41dma  4 0 &cppi41dma  5 0
 118                         &cppi41dma  6 0 &cppi41dma  7 0
 119                         &cppi41dma  8 0 &cppi41dma  9 0
 120                         &cppi41dma 10 0 &cppi41dma 11 0
 121                         &cppi41dma 12 0 &cppi41dma 13 0
 122                         &cppi41dma 14 0 &cppi41dma  0 1
 123                         &cppi41dma  1 1 &cppi41dma  2 1
 124                         &cppi41dma  3 1 &cppi41dma  4 1
 125                         &cppi41dma  5 1 &cppi41dma  6 1
 126                         &cppi41dma  7 1 &cppi41dma  8 1
 127                         &cppi41dma  9 1 &cppi41dma 10 1
 128                         &cppi41dma 11 1 &cppi41dma 12 1
 129                         &cppi41dma 13 1 &cppi41dma 14 1>;
 130                 dma-names =
 131                         "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
 132                         "rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
 133                         "rx14", "rx15",
 134                         "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
 135                         "tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
 136                         "tx14", "tx15";
 137         };
 138
 139         usb1_phy: usb-phy@47401b00 {
 140                 compatible = "ti,am335x-usb-phy";
 141                 reg = <0x47401b00 0x100>;
 142                 reg-names = "phy";
 143                 ti,ctrl_mod = <&ctrl_mod>;
 144         };
 145
 146         usb1: usb@47401800 {
 147                 compatible = "ti,musb-am33xx";
 148                 reg = <0x47401c00 0x400
 149                         0x47401800 0x200>;
 150                 reg-names = "mc", "control";
 151                 interrupts = <19>;
 152                 interrupt-names = "mc";
 153                 dr_mode = "host"
 154                 mentor,multipoint = <1>;
 155                 mentor,num-eps = <16>;
 156                 mentor,ram-bits = <12>;
 157                 mentor,power = <500>;
 158                 phys = <&usb1_phy>;
 159
 160                 dmas = <&cppi41dma 15 0 &cppi41dma 16 0
 161                         &cppi41dma 17 0 &cppi41dma 18 0
 162                         &cppi41dma 19 0 &cppi41dma 20 0
 163                         &cppi41dma 21 0 &cppi41dma 22 0
 164                         &cppi41dma 23 0 &cppi41dma 24 0
 165                         &cppi41dma 25 0 &cppi41dma 26 0
 166                         &cppi41dma 27 0 &cppi41dma 28 0
 167                         &cppi41dma 29 0 &cppi41dma 15 1
 168                         &cppi41dma 16 1 &cppi41dma 17 1
 169                         &cppi41dma 18 1 &cppi41dma 19 1
 170                         &cppi41dma 20 1 &cppi41dma 21 1
 171                         &cppi41dma 22 1 &cppi41dma 23 1
 172                         &cppi41dma 24 1 &cppi41dma 25 1
 173                         &cppi41dma 26 1 &cppi41dma 27 1
 174                         &cppi41dma 28 1 &cppi41dma 29 1>;
 175                 dma-names =
 176                         "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7",
 177                         "rx8", "rx9", "rx10", "rx11", "rx12", "rx13",
 178                         "rx14", "rx15",
 179                         "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7",
 180                         "tx8", "tx9", "tx10", "tx11", "tx12", "tx13",
 181                         "tx14", "tx15";
 182         };
 183
 184         cppi41dma: dma-controller@7402000 {
 185                 compatible = "ti,am3359-cppi41";
 186                 reg =  <0x47400000 0x1000
 187                         0x47402000 0x1000
 188                         0x47403000 0x1000
 189                         0x47404000 0x4000>;
 190                 reg-names = "glue", "controller", "scheduler", "queuemgr";
 191                 interrupts = <17>;
 192                 interrupt-names = "glue";
 193                 #dma-cells = <2>;
 194                 #dma-channels = <30>;
 195                 #dma-requests = <256>;
 196         };
 197 };