diff options
author | Jack Humbert <jack.humb@gmail.com> | 2015-10-27 14:52:18 -0400 |
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committer | Jack Humbert <jack.humb@gmail.com> | 2015-10-27 14:52:18 -0400 |
commit | d311fd8d1a0af3b767d26b520d399bf0db22f058 (patch) | |
tree | b9de5704143ac205b4e26222f9d7551e9b161924 /tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h | |
parent | a766918d5c48204375f4c207b30bbbf1389df14f (diff) | |
parent | 6f3141965e88c4ee0ebf7c18a243e4c2d9c5021b (diff) |
Merge pull request #34 from jackhumbert/tmk-master
merging from tmk, new_project script and template
Diffstat (limited to 'tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h')
-rw-r--r-- | tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h b/tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h new file mode 100644 index 0000000000..c3e1b3141f --- /dev/null +++ b/tmk_core/protocol/usb_hid/USB_Host_Shield_2.0/address.h @@ -0,0 +1,282 @@ +/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved. + +This software may be distributed and modified under the terms of the GNU +General Public License version 2 (GPL2) as published by the Free Software +Foundation and appearing in the file GPL2.TXT included in the packaging of +this file. Please note that GPL2 Section 2[b] requires that all works based +on this software must also be made publicly available under the terms of +the GPL2 ("Copyleft"). + +Contact information +------------------- + +Circuits At Home, LTD +Web : http://www.circuitsathome.com +e-mail : support@circuitsathome.com + */ + +#if !defined(_usb_h_) || defined(__ADDRESS_H__) +#error "Never include address.h directly; include Usb.h instead" +#else +#define __ADDRESS_H__ + + + +/* NAK powers. To save space in endpoint data structure, amount of retries before giving up and returning 0x4 is stored in */ +/* bmNakPower as a power of 2. The actual nak_limit is then calculated as nak_limit = ( 2^bmNakPower - 1) */ +#define USB_NAK_MAX_POWER 15 //NAK binary order maximum value +#define USB_NAK_DEFAULT 14 //default 32K-1 NAKs before giving up +#define USB_NAK_NOWAIT 1 //Single NAK stops transfer +#define USB_NAK_NONAK 0 //Do not count NAKs, stop retrying after USB Timeout + +struct EpInfo { + uint8_t epAddr; // Endpoint address + uint8_t maxPktSize; // Maximum packet size + + union { + uint8_t epAttribs; + + struct { + uint8_t bmSndToggle : 1; // Send toggle, when zero bmSNDTOG0, bmSNDTOG1 otherwise + uint8_t bmRcvToggle : 1; // Send toggle, when zero bmRCVTOG0, bmRCVTOG1 otherwise + uint8_t bmNakPower : 6; // Binary order for NAK_LIMIT value + } __attribute__((packed)); + }; +} __attribute__((packed)); + +// 7 6 5 4 3 2 1 0 +// --------------------------------- +// | | H | P | P | P | A | A | A | +// --------------------------------- +// +// H - if 1 the address is a hub address +// P - parent hub address +// A - device address / port number in case of hub +// + +struct UsbDeviceAddress { + + union { + + struct { + uint8_t bmAddress : 3; // device address/port number + uint8_t bmParent : 3; // parent hub address + uint8_t bmHub : 1; // hub flag + uint8_t bmReserved : 1; // reserved, must be zero + } __attribute__((packed)); + uint8_t devAddress; + }; +} __attribute__((packed)); + +#define bmUSB_DEV_ADDR_ADDRESS 0x07 +#define bmUSB_DEV_ADDR_PARENT 0x38 +#define bmUSB_DEV_ADDR_HUB 0x40 + +struct UsbDevice { + EpInfo *epinfo; // endpoint info pointer + UsbDeviceAddress address; + uint8_t epcount; // number of endpoints + bool lowspeed; // indicates if a device is the low speed one + // uint8_t devclass; // device class +} __attribute__((packed)); + +class AddressPool { +public: + virtual UsbDevice* GetUsbDevicePtr(uint8_t addr) = 0; + virtual uint8_t AllocAddress(uint8_t parent, bool is_hub = false, uint8_t port = 0) = 0; + virtual void FreeAddress(uint8_t addr) = 0; +}; + +typedef void (*UsbDeviceHandleFunc)(UsbDevice *pdev); + +#define ADDR_ERROR_INVALID_INDEX 0xFF +#define ADDR_ERROR_INVALID_ADDRESS 0xFF + +template <const uint8_t MAX_DEVICES_ALLOWED> +class AddressPoolImpl : public AddressPool { + EpInfo dev0ep; //Endpoint data structure used during enumeration for uninitialized device + + uint8_t hubCounter; // hub counter is kept + // in order to avoid hub address duplication + + UsbDevice thePool[MAX_DEVICES_ALLOWED]; + + // Initializes address pool entry + + void InitEntry(uint8_t index) { + thePool[index].address.devAddress = 0; + thePool[index].epcount = 1; + thePool[index].lowspeed = 0; + thePool[index].epinfo = &dev0ep; + }; + + // Returns thePool index for a given address + + uint8_t FindAddressIndex(uint8_t address = 0) { + for(uint8_t i = 1; i < MAX_DEVICES_ALLOWED; i++) { + if(thePool[i].address.devAddress == address) + return i; + } + return 0; + }; + + // Returns thePool child index for a given parent + + uint8_t FindChildIndex(UsbDeviceAddress addr, uint8_t start = 1) { + for(uint8_t i = (start < 1 || start >= MAX_DEVICES_ALLOWED) ? 1 : start; i < MAX_DEVICES_ALLOWED; i++) { + if(thePool[i].address.bmParent == addr.bmAddress) + return i; + } + return 0; + }; + + // Frees address entry specified by index parameter + + void FreeAddressByIndex(uint8_t index) { + // Zero field is reserved and should not be affected + if(index == 0) + return; + + UsbDeviceAddress uda = thePool[index].address; + // If a hub was switched off all port addresses should be freed + if(uda.bmHub == 1) { + for(uint8_t i = 1; (i = FindChildIndex(uda, i));) + FreeAddressByIndex(i); + + // If the hub had the last allocated address, hubCounter should be decremented + if(hubCounter == uda.bmAddress) + hubCounter--; + } + InitEntry(index); + } + + // Initializes the whole address pool at once + + void InitAllAddresses() { + for(uint8_t i = 1; i < MAX_DEVICES_ALLOWED; i++) + InitEntry(i); + + hubCounter = 0; + }; + +public: + + AddressPoolImpl() : hubCounter(0) { + // Zero address is reserved + InitEntry(0); + + thePool[0].address.devAddress = 0; + thePool[0].epinfo = &dev0ep; + dev0ep.epAddr = 0; + dev0ep.maxPktSize = 8; + dev0ep.epAttribs = 0; //set DATA0/1 toggles to 0 + dev0ep.bmNakPower = USB_NAK_MAX_POWER; + + InitAllAddresses(); + }; + + // Returns a pointer to a specified address entry + + virtual UsbDevice* GetUsbDevicePtr(uint8_t addr) { + if(!addr) + return thePool; + + uint8_t index = FindAddressIndex(addr); + + return (!index) ? NULL : thePool + index; + }; + + // Performs an operation specified by pfunc for each addressed device + + void ForEachUsbDevice(UsbDeviceHandleFunc pfunc) { + if(!pfunc) + return; + + for(uint8_t i = 1; i < MAX_DEVICES_ALLOWED; i++) + if(thePool[i].address.devAddress) + pfunc(thePool + i); + }; + + // Allocates new address + + virtual uint8_t AllocAddress(uint8_t parent, bool is_hub = false, uint8_t port = 0) { + /* if (parent != 0 && port == 0) + USB_HOST_SERIAL.println("PRT:0"); */ + UsbDeviceAddress _parent; + _parent.devAddress = parent; + if(_parent.bmReserved || port > 7) + //if(parent > 127 || port > 7) + return 0; + + if(is_hub && hubCounter == 7) + return 0; + + // finds first empty address entry starting from one + uint8_t index = FindAddressIndex(0); + + if(!index) // if empty entry is not found + return 0; + + if(_parent.devAddress == 0) { + if(is_hub) { + thePool[index].address.devAddress = 0x41; + hubCounter++; + } else + thePool[index].address.devAddress = 1; + + return thePool[index].address.devAddress; + } + + UsbDeviceAddress addr; + addr.devAddress = 0; // Ensure all bits are zero + addr.bmParent = _parent.bmAddress; + if(is_hub) { + addr.bmHub = 1; + addr.bmAddress = ++hubCounter; + } else { + addr.bmHub = 0; + addr.bmAddress = port; + } + thePool[index].address = addr; + /* + USB_HOST_SERIAL.print("Addr:"); + USB_HOST_SERIAL.print(addr.bmHub, HEX); + USB_HOST_SERIAL.print("."); + USB_HOST_SERIAL.print(addr.bmParent, HEX); + USB_HOST_SERIAL.print("."); + USB_HOST_SERIAL.println(addr.bmAddress, HEX); + */ + return thePool[index].address.devAddress; + }; + + // Empties pool entry + + virtual void FreeAddress(uint8_t addr) { + // if the root hub is disconnected all the addresses should be initialized + if(addr == 0x41) { + InitAllAddresses(); + return; + } + uint8_t index = FindAddressIndex(addr); + FreeAddressByIndex(index); + }; + + // Returns number of hubs attached + // It can be rather helpfull to find out if there are hubs attached than getting the exact number of hubs. + //uint8_t GetNumHubs() + //{ + // return hubCounter; + //}; + //uint8_t GetNumDevices() + //{ + // uint8_t counter = 0; + + // for (uint8_t i=1; i<MAX_DEVICES_ALLOWED; i++) + // if (thePool[i].address != 0); + // counter ++; + + // return counter; + //}; +}; + +#endif // __ADDRESS_H__ |