Diff: USBHALHost.cpp

Revision:

2:0cdac6bcc534

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHALHost.cpp	Thu Jan 23 08:32:54 2014 +0000
@@ -0,0 +1,285 @@
+// Simple USBHost for FRDM-KL46Z
+#include "USBHALHost.h"
+#include <algorithm>
+
+template <bool>struct CtAssert;
+template <>struct CtAssert<true> {};
+#define CTASSERT(A) CtAssert<A>();
+
+
+#ifdef _USB_DBG
+#define USB_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\n");} while(0);
+#define USB_DBG_HEX(A,B) debug_hex(A,B)
+void debug_hex(uint8_t* buf, int size);
+#else
+#define USB_DBG(...) while(0)
+#define USB_DBG_HEX(A,B) while(0)
+#endif
+
+#define USB_TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
+#define USB_TEST_ASSERT_FALSE(A) USB_TEST_ASSERT(!(A))
+
+#define BD_OWN_MASK        (1<<7)
+#define BD_DATA01_MASK     (1<<6)
+#define BD_KEEP_MASK       (1<<5)
+#define BD_NINC_MASK       (1<<4)
+#define BD_DTS_MASK        (1<<3)
+#define BD_STALL_MASK      (1<<2)
+
+#define TX    1
+#define RX    0
+
+#define EP0_BDT_IDX(dir, odd) (((2 * dir) + (1 * odd)))
+
+#define SETUP_TOKEN    0x0D
+#define IN_TOKEN       0x09
+#define OUT_TOKEN      0x01
+
+// for each endpt: 8 bytes
+struct BDT {
+    uint8_t   info;       // BD[0:7]
+    uint8_t   dummy;      // RSVD: BD[8:15]
+    uint16_t  byte_count; // BD[16:32]
+    uint32_t  address;    // Addr
+    void setBuffer(uint8_t* buf, int size) {
+        address = (uint32_t)buf;
+        byte_count = size;
+    }
+    uint8_t getStatus() {
+        return (info>>2)&0x0f;
+    }    
+};
+
+__attribute__((__aligned__(512))) BDT bdt[64];
+
+USBHALHost* USBHALHost::instHost;
+
+USBHALHost::USBHALHost() {
+    instHost = this;
+    memset(rx_data01, DATA1, sizeof(rx_data01));
+    memset(tx_data01, DATA1, sizeof(tx_data01));
+}
+
+void USBHALHost::init() {
+    // Disable IRQ
+    NVIC_DisableIRQ(USB0_IRQn);
+
+    // choose usb src as PLL
+    SIM->SOPT2 |= (SIM_SOPT2_USBSRC_MASK | SIM_SOPT2_PLLFLLSEL_MASK);
+
+    // enable OTG clock
+    SIM->SCGC4 |= SIM_SCGC4_USBOTG_MASK;
+
+    // USB Module Configuration
+    // Reset USB Module
+    USB0->USBTRC0 |= USB_USBTRC0_USBRESET_MASK;
+    while(USB0->USBTRC0 & USB_USBTRC0_USBRESET_MASK);
+
+    // Clear interrupt flag
+    USB0->ISTAT = 0xff;
+
+    // Set BDT Base Register
+    USB0->BDTPAGE1=(uint8_t)((uint32_t)bdt>>8);
+    USB0->BDTPAGE2=(uint8_t)((uint32_t)bdt>>16);
+    USB0->BDTPAGE3=(uint8_t)((uint32_t)bdt>>24);
+
+    // Set SOF threshold
+    USB0->SOFTHLD = USB_SOFTHLD_CNT(1);
+
+    // pulldown D+ and D-
+    USB0->USBCTRL = USB_USBCTRL_PDE_MASK;
+
+    USB0->USBTRC0 |= 0x40;
+
+    // Host mode
+    USB0->CTL |= USB_CTL_HOSTMODEEN_MASK;
+    // Desable SOF packet generation
+    USB0->CTL &= ~USB_CTL_USBENSOFEN_MASK;
+
+    NVIC_SetVector(USB0_IRQn, (uint32_t)_usbisr);
+    NVIC_EnableIRQ(USB0_IRQn);
+
+    wait_attach();
+
+    for(int retry = 2; retry > 0; retry--) {
+        // Enable RESET
+        USB0->CTL |= USB_CTL_RESET_MASK;
+        wait_ms(500);
+        USB0->CTL &= ~USB_CTL_RESET_MASK;
+    
+        // Enable SOF
+        USB0->CTL |= USB_CTL_USBENSOFEN_MASK;
+        wait_ms(100);
+
+        // token transfer initialize
+        tx_ptr = ODD;
+        rx_ptr = ODD;
+        USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK;
+
+        if (enumeration()) {
+            break;
+        }
+        USB_DBG("retry=%d", retry);
+        USB_TEST_ASSERT(retry > 1);
+    }
+}
+
+void USBHALHost::wait_attach() {
+    attach_done = false;
+    USB0->INTEN = USB_INTEN_ATTACHEN_MASK;
+    while(!attach_done);
+    wait_ms(100);
+    USB_TEST_ASSERT_FALSE(USB0->CTL & USB_CTL_SE0_MASK);
+    lowSpeed = (USB0->CTL & USB_CTL_JSTATE_MASK) ? false : true;
+    if (lowSpeed) { // low speed
+        USB0->ENDPOINT[0].ENDPT |= USB_ENDPT_HOSTWOHUB_MASK;
+    }
+    USB_DBG("lowSpeed=%d", lowSpeed);
+}
+
+void USBHALHost::setAddr(int _addr) {
+    USB0->ADDR = (lowSpeed ? USB_ADDR_LSEN_MASK : 0x00) | USB_ADDR_ADDR(_addr);
+}
+
+void USBHALHost::setEndpoint(bool use_retry) {
+    USB0->ENDPOINT[0].ENDPT = (lowSpeed ? USB_ENDPT_HOSTWOHUB_MASK : 0x00)|
+                              USB_ENDPT_EPCTLDIS_MASK|
+                              (use_retry ? 0x00 : USB_ENDPT_RETRYDIS_MASK)|
+                              USB_ENDPT_EPRXEN_MASK|
+                              USB_ENDPT_EPTXEN_MASK|
+                              USB_ENDPT_EPHSHK_MASK;
+}
+
+int USBHALHost::token_setup(SETUP_PACKET* setup, uint16_t wLength) {
+    int retry = 0;
+    do {
+        token_ready();
+        USB0->ENDPOINT[0].ENDPT = (lowSpeed ? USB_ENDPT_HOSTWOHUB_MASK : 0x00) |
+                                  USB_ENDPT_RETRYDIS_MASK|
+                                  USB_ENDPT_EPRXEN_MASK|
+                                  USB_ENDPT_EPTXEN_MASK|
+                                  USB_ENDPT_EPHSHK_MASK;
+        CTASSERT(sizeof(SETUP_PACKET) == 8);
+        setup->wLength = wLength;
+        int idx = EP0_BDT_IDX(TX, tx_ptr);
+        bdt[idx].setBuffer((uint8_t*)setup, sizeof(SETUP_PACKET));
+        bdt[idx].info = BD_OWN_MASK |
+                        BD_DTS_MASK; // always data0
+        token_done = false;
+        USB0->TOKEN = USB_TOKEN_TOKENPID(SETUP_TOKEN)|USB_TOKEN_TOKENENDPT(0);
+        while(!token_done);
+        LastStatus = bdt[idx].getStatus();
+        if (LastStatus == ACK) {
+            if (retry > 0) {
+                USB_DBG("retry=%d %02x", retry, prev_LastStatus);
+            }
+            return ACK;
+        }
+        wait_ms(1);
+        prev_LastStatus = LastStatus;
+        //USB_DBG("retry=%d %02x", retry, prev_LastStatus);
+    }while(retry++ < 10);
+    return LastStatus;
+}
+
+int USBHALHost::token_in(uint8_t ep, uint8_t* data, int size, int retryLimit) {
+    USB_TEST_ASSERT(ep < sizeof(rx_data01));
+    for(int retry = 0;; retry++) {
+        token_ready();
+        int idx = EP0_BDT_IDX(RX, rx_ptr);
+        bdt[idx].setBuffer(data, size);
+        bdt[idx].info = BD_OWN_MASK|
+                        BD_DTS_MASK|
+                        ((rx_data01[ep] == DATA1) ? BD_DATA01_MASK : 0);
+        token_done = false;
+        USB0->TOKEN = USB_TOKEN_TOKENPID(IN_TOKEN)|USB_TOKEN_TOKENENDPT(ep);
+        while(!token_done);
+        LastStatus = bdt[idx].getStatus();
+        int len = bdt[idx].byte_count;
+        if (LastStatus == DATA0 || LastStatus == DATA1) {
+            rx_data01[ep] = LastStatus == DATA0 ? DATA1 : DATA0;
+            if (retry > 0) {
+                USB_DBG("len=%d retry=%d %02x", len, retry, prev_LastStatus);
+            }
+            return len;
+        }
+        if (++retry >= retryLimit) {
+            return -1;
+        }
+        wait_ms(100);
+        prev_LastStatus = LastStatus;
+    }
+}
+
+int USBHALHost::token_out(uint8_t ep, const uint8_t* data, int size) {
+    USB_TEST_ASSERT(ep < sizeof(tx_data01));
+    int retry = 0;
+    do {
+        token_ready();
+        int idx = EP0_BDT_IDX(TX, tx_ptr);
+        bdt[idx].info = BD_OWN_MASK|
+                        BD_DTS_MASK|
+                       ((tx_data01[ep] == DATA1) ? BD_DATA01_MASK : 0);
+        bdt[idx].setBuffer((uint8_t*)data, size);
+        token_done = false;
+        USB0->TOKEN = USB_TOKEN_TOKENPID(OUT_TOKEN)|USB_TOKEN_TOKENENDPT(ep);
+        while(!token_done);
+        LastStatus = bdt[idx].getStatus();
+        if (LastStatus == ACK) {
+            tx_data01[ep] = (tx_data01[ep] == DATA0) ? DATA1 : DATA0;
+            if (retry > 0) {
+                USB_DBG("retry=%d %02x", retry, prev_LastStatus);
+            }
+            return bdt[idx].byte_count;
+        }
+        wait_ms(10);
+        prev_LastStatus = LastStatus;
+    } while(retry++ < 10);
+    return -1;
+}
+
+void USBHALHost::token_ready() {
+    while(USB0->CTL & USB_CTL_TXSUSPENDTOKENBUSY_MASK) { // TOKEN_BUSY ?
+        wait_ms(1);
+    }
+    USB0->ISTAT |= USB_ISTAT_SOFTOK_MASK; // Clear SOF
+    while (!(USB0->ISTAT & USB_ISTAT_SOFTOK_MASK));
+    USB0->SOFTHLD = 0; // this is needed as without this you can get errors
+    USB0->ISTAT |= USB_ISTAT_SOFTOK_MASK; // clear SOF
+}
+
+void USBHALHost::_usbisr(void) {
+    if (instHost) {
+        instHost->UsbIrqhandler();
+    }
+}
+
+void USBHALHost::UsbIrqhandler() {
+    uint8_t istat = USB0->ISTAT;
+    if (istat & USB_ISTAT_TOKDNE_MASK) {
+        uint8_t stat = USB0->STAT;
+        ODD_EVEN next_ptr = (stat & USB_STAT_ODD_MASK) ? ODD : EVEN;
+        if (stat & USB_STAT_TX_MASK) {
+            tx_ptr = next_ptr;
+        } else {
+            rx_ptr = next_ptr;
+        }
+        token_done = true;
+    }
+    if (istat & USB_ISTAT_ATTACH_MASK) {
+        USB0->INTEN &= ~USB_INTEN_ATTACHEN_MASK;
+        attach_done = true;
+    }
+    USB0->ISTAT = istat; // clear
+}
+
+void debug_hex(uint8_t* buf, int size) {
+    for(int i = 0; i < size; i++) {
+        fprintf(stderr, "%02x ", buf[i]);
+        if (i%16 == 15) {
+            fprintf(stderr, "\r\n");
+        }
+    }
+    fprintf(stderr, "\r\n");
+}
+