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/usb/am33xx-usb.txt
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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 - #dma-channels: deprecated 67 68 Example: 69 ~~~~~~~~ 70 The following example contains all the nodes as used on am335x-evm: 71 72 aliases { 73 usb0 = &usb0; 74 usb1 = &usb1; 75 phy0 = &usb0_phy; 76 phy1 = &usb1_phy; 77 }; 78 79 usb: usb@47400000 { 80 compatible = "ti,am33xx-usb"; 81 reg = <0x47400000 0x1000>; 82 ranges; 83 #address-cells = <1>; 84 #size-cells = <1>; 85 ti,hwmods = "usb_otg_hs"; 86 87 ctrl_mod: control@44e10000 { 88 compatible = "ti,am335x-usb-ctrl-module"; 89 reg = <0x44e10620 0x10 90 0x44e10648 0x4>; 91 reg-names = "phy_ctrl", "wakeup"; 92 }; 93 94 usb0_phy: usb-phy@47401300 { 95 compatible = "ti,am335x-usb-phy"; 96 reg = <0x47401300 0x100>; 97 reg-names = "phy"; 98 ti,ctrl_mod = <&ctrl_mod>; 99 #phy-cells = <0>; 100 }; 101 102 usb0: usb@47401000 { 103 compatible = "ti,musb-am33xx"; 104 reg = <0x47401400 0x400 105 0x47401000 0x200>; 106 reg-names = "mc", "control"; 107 108 interrupts = <18>; 109 interrupt-names = "mc"; 110 dr_mode = "otg" 111 mentor,multipoint = <1>; 112 mentor,num-eps = <16>; 113 mentor,ram-bits = <12>; 114 mentor,power = <500>; 115 phys = <&usb0_phy>; 116 117 dmas = <&cppi41dma 0 0 &cppi41dma 1 0 118 &cppi41dma 2 0 &cppi41dma 3 0 119 &cppi41dma 4 0 &cppi41dma 5 0 120 &cppi41dma 6 0 &cppi41dma 7 0 121 &cppi41dma 8 0 &cppi41dma 9 0 122 &cppi41dma 10 0 &cppi41dma 11 0 123 &cppi41dma 12 0 &cppi41dma 13 0 124 &cppi41dma 14 0 &cppi41dma 0 1 125 &cppi41dma 1 1 &cppi41dma 2 1 126 &cppi41dma 3 1 &cppi41dma 4 1 127 &cppi41dma 5 1 &cppi41dma 6 1 128 &cppi41dma 7 1 &cppi41dma 8 1 129 &cppi41dma 9 1 &cppi41dma 10 1 130 &cppi41dma 11 1 &cppi41dma 12 1 131 &cppi41dma 13 1 &cppi41dma 14 1>; 132 dma-names = 133 "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7", 134 "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", 135 "rx14", "rx15", 136 "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7", 137 "tx8", "tx9", "tx10", "tx11", "tx12", "tx13", 138 "tx14", "tx15"; 139 }; 140 141 usb1_phy: usb-phy@47401b00 { 142 compatible = "ti,am335x-usb-phy"; 143 reg = <0x47401b00 0x100>; 144 reg-names = "phy"; 145 ti,ctrl_mod = <&ctrl_mod>; 146 #phy-cells = <0>; 147 }; 148 149 usb1: usb@47401800 { 150 compatible = "ti,musb-am33xx"; 151 reg = <0x47401c00 0x400 152 0x47401800 0x200>; 153 reg-names = "mc", "control"; 154 interrupts = <19>; 155 interrupt-names = "mc"; 156 dr_mode = "host" 157 mentor,multipoint = <1>; 158 mentor,num-eps = <16>; 159 mentor,ram-bits = <12>; 160 mentor,power = <500>; 161 phys = <&usb1_phy>; 162 163 dmas = <&cppi41dma 15 0 &cppi41dma 16 0 164 &cppi41dma 17 0 &cppi41dma 18 0 165 &cppi41dma 19 0 &cppi41dma 20 0 166 &cppi41dma 21 0 &cppi41dma 22 0 167 &cppi41dma 23 0 &cppi41dma 24 0 168 &cppi41dma 25 0 &cppi41dma 26 0 169 &cppi41dma 27 0 &cppi41dma 28 0 170 &cppi41dma 29 0 &cppi41dma 15 1 171 &cppi41dma 16 1 &cppi41dma 17 1 172 &cppi41dma 18 1 &cppi41dma 19 1 173 &cppi41dma 20 1 &cppi41dma 21 1 174 &cppi41dma 22 1 &cppi41dma 23 1 175 &cppi41dma 24 1 &cppi41dma 25 1 176 &cppi41dma 26 1 &cppi41dma 27 1 177 &cppi41dma 28 1 &cppi41dma 29 1>; 178 dma-names = 179 "rx1", "rx2", "rx3", "rx4", "rx5", "rx6", "rx7", 180 "rx8", "rx9", "rx10", "rx11", "rx12", "rx13", 181 "rx14", "rx15", 182 "tx1", "tx2", "tx3", "tx4", "tx5", "tx6", "tx7", 183 "tx8", "tx9", "tx10", "tx11", "tx12", "tx13", 184 "tx14", "tx15"; 185 }; 186 187 cppi41dma: dma-controller@7402000 { 188 compatible = "ti,am3359-cppi41"; 189 reg = <0x47400000 0x1000 190 0x47402000 0x1000 191 0x47403000 0x1000 192 0x47404000 0x4000>; 193 reg-names = "glue", "controller", "scheduler", "queuemgr"; 194 interrupts = <17>; 195 interrupt-names = "glue"; 196 #dma-cells = <2>; 197 dma-channels = <30>; 198 dma-requests = <256>; 199 }; 200 };
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