as3525v2: add partial usb init code

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26157 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 175 insertions, 10 deletions

diff --git a/firmware/target/arm/as3525/usb-drv-as3525v2.c b/firmware/target/arm/as3525/usb-drv-as3525v2.c
index 83a5701a11..369a838c65 100644
--- a/firmware/target/arm/as3525/usb-drv-as3525v2.c
+++ b/firmware/target/arm/as3525/usb-drv-as3525v2.c
@@ -48,6 +48,9 @@ struct usb_endpoint
 static struct usb_endpoint endpoints[USB_NUM_ENDPOINTS*2];
 #endif
 
+static unsigned int usb_num_in_ep = 0;
+static unsigned int usb_num_out_ep = 0;
+
 void usb_attach(void)
 {
     usb_enable(true);
@@ -102,6 +105,51 @@ static void as3525v2_connect(void)
     usb_delay();
 }
 
+static void usb_enable_common_interrupts(void)
+{
+    /* Clear any pending otg interrupt */
+    USB_GOTGINT = 0xffffffff;
+    /* Clear any pending interrupt */
+    USB_GINTSTS = 0Xffffffff;
+    /* Enable interrupts */
+    USB_GINTMSK |= USB_GINTMSK_modemismatch |
+                    USB_GINTMSK_otgintr |
+                    USB_GINTMSK_rxstsqlvl | /* for dma */
+                    USB_GINTMSK_conidstschng |
+                    USB_GINTMSK_wkupintr |
+                    USB_GINTMSK_disconnect |
+                    USB_GINTMSK_usbsuspend |
+                    USB_GINTMSK_sessreqintr;
+}
+
+static void usb_flush_tx_fifos(int nums)
+{
+    unsigned int i = 0;
+    
+    USB_GRSTCTL = (USB_GRSTCTL & (~USB_GRSTCTL_txfnum_bits))
+        | (nums << USB_GRSTCTL_txfnum_bit_pos)
+        | USB_GRSTCTL_txfflsh_flush;
+    while(USB_GRSTCTL & USB_GRSTCTL_txfflsh_flush && i < 0x300)
+        i++;
+    if(USB_GRSTCTL & USB_GRSTCTL_txfflsh_flush)
+        panicf("usb: hang of flush tx fifos (%x)", nums);
+    /* wait 3 phy clocks */
+    sleep(1);
+}
+
+static void usb_flush_rx_fifo(void)
+{
+    unsigned int i = 0;
+    
+    USB_GRSTCTL |= USB_GRSTCTL_rxfflsh_flush;
+    while(USB_GRSTCTL & USB_GRSTCTL_rxfflsh_flush && i < 0x300)
+        i++;
+    if(USB_GRSTCTL & USB_GRSTCTL_rxfflsh_flush)
+        panicf("usb: hang of flush rx fifo");
+    /* wait 3 phy clocks */
+    sleep(1);
+}
+
 static void core_reset(void)
 {
     unsigned int i = 0;
@@ -118,26 +166,137 @@ static void core_reset(void)
         i++;
 
     if(USB_GRSTCTL & USB_GRSTCTL_csftrst)
-    {
-        logf("oops, usb core soft reset hang :(");
-    }
+        panicf("oops, usb core soft reset hang :(");
 
     /* Wait for 3 PHY Clocks */
     /*mdelay(100);*/
     sleep(1);
 
-    logf("%ld endpoints", USB_GHWCFG2_NUM_EP);
-    for(i = 0; i < USB_GHWCFG2_NUM_EP; i++)
-        logf("  EP%d: IN=%ld OUT=%ld", i, USB_GHWCFG1_IN_EP(i), USB_GHWCFG1_OUT_EP(i));
+    /* Check hardware capabilityies */
+    if(USB_GHWCFG2_ARCH != USB_INT_DMA_ARCH)
+        panicf("usb: wrong architecture (%ld)", USB_GHWCFG2_ARCH);
+    if(USB_GHWCFG2_HS_PHY_TYPE != USB_PHY_TYPE_UTMI)
+        panicf("usb: wrong HS phy type (%ld)", USB_GHWCFG2_HS_PHY_TYPE);
+    if(USB_GHWCFG2_FS_PHY_TYPE != USB_PHY_TYPE_UNSUPPORTED)
+        panicf("usb: wrong FS phy type (%ld)", USB_GHWCFG2_FS_PHY_TYPE);
+    if(USB_GHWCFG2_DYN_FIFO != 1)
+        panicf("usb: no dynamic fifo");
+    if(USB_GHWCFG4_UTMI_PHY_DATA_WIDTH != 0x2)
+        panicf("usb: wrong utmi data width (%ld)", USB_GHWCFG4_UTMI_PHY_DATA_WIDTH);
+    if(USB_GHWCFG4_DED_FIFO_EN != 1) /* it seems to be multiple tx fifo support */
+        panicf("usb: no multiple tx fifo");
+
     logf("hwcfg1: %08lx", USB_GHWCFG1);
     logf("hwcfg2: %08lx", USB_GHWCFG2);
     logf("hwcfg3: %08lx", USB_GHWCFG3);
     logf("hwcfg4: %08lx", USB_GHWCFG4);
 
-    logf("%ld in ep", USB_GHWCFG4_NUM_IN_EP);
-    logf("tot fifo sz: %ld", USB_GHWCFG3_DFIFO_LEN);
-    logf("rx fifo sz: %ld", USB_GRXFSIZ);
-    logf("tx fifo sz: %ld", USB_GNPTXFSIZ >> 16); /* there is no perio ep so print only non-perio */
+    logf("%ld endpoints", USB_GHWCFG2_NUM_EP);
+    usb_num_in_ep = 0;
+    usb_num_out_ep = 0;
+    for(i = 0; i < USB_GHWCFG2_NUM_EP; i++)
+    {
+        if(USB_GHWCFG1_IN_EP(i))
+            usb_num_in_ep++;
+        if(USB_GHWCFG1_OUT_EP(i))
+            usb_num_out_ep++;
+        logf("  EP%d: IN=%ld OUT=%ld", i, USB_GHWCFG1_IN_EP(i), USB_GHWCFG1_OUT_EP(i));
+    }
+
+    if(usb_num_in_ep != USB_GHWCFG4_NUM_IN_EP)
+        panicf("usb: num in ep mismatch(%d,%lu)", usb_num_in_ep, USB_GHWCFG4_NUM_IN_EP);
+
+    logf("%d in ep, %d out ep", usb_num_in_ep, usb_num_out_ep);
+    logf("initial:");
+    logf("  tot fifo sz: %ld", USB_GHWCFG3_DFIFO_LEN);
+    logf("  rx fifo sz: %ld", USB_GRXFSIZ);
+    logf("  tx fifo sz: %ld", USB_GET_FIFOSIZE_DEPTH(USB_GNPTXFSIZ)); /* there is no perio ep so print only non-perio */
+    for(i = 1; i <= USB_GHWCFG4_NUM_IN_EP; i++)
+    {
+        logf("  dieptx fifo sd (%2u): %ld", i, USB_GET_FIFOSIZE_DEPTH(USB_DIEPTXFSIZ(i)));
+    }
+
+    /* Setup FIFOs */
+    /* Organize FIFO as follow (unsure):
+     *             0           ->         rxfsize         : RX fifo
+     *          rxfsize        ->   rxfsize + nptxfsize   : TX fifo for first IN ep
+     *   rxfsize + nptxfsize   -> rxfsize + 2 * nptxfsize : TX fifo for second IN ep
+     * rxfsize + 2 * nptxfsize -> rxfsize + 3 * nptxfsize : TX fifo for third IN ep
+     * ...
+     */
+
+    unsigned short adr = USB_GRXFSIZ;
+    unsigned short depth = USB_GET_FIFOSIZE_DEPTH(USB_GNPTXFSIZ);
+    USB_GNPTXFSIZ = USB_MAKE_FIFOSIZE_DATA(adr, depth);
+    adr += depth;
+
+    for(i = 1; i <= USB_GHWCFG4_NUM_IN_EP; i++)
+    {
+        depth = USB_GET_FIFOSIZE_DEPTH(USB_DIEPTXFSIZ(i));
+        USB_DIEPTXFSIZ(i) = USB_MAKE_FIFOSIZE_DATA(adr, depth);
+        adr += depth;
+    }
+
+    logf("used:");
+    logf("  rx fifo: [%04x,+%4lx]", 0, USB_GRXFSIZ);
+    logf("  nptx fifo: [%04lx,+%4lx]", USB_GET_FIFOSIZE_START_ADR(USB_GNPTXFSIZ),
+        USB_GET_FIFOSIZE_DEPTH(USB_GNPTXFSIZ));
+    for(i = 1; i <= USB_GHWCFG4_NUM_IN_EP; i++)
+    {
+        logf("  dieptx fifo(%2u): [%04lx,+%4lx]", i,
+            USB_GET_FIFOSIZE_START_ADR(USB_DIEPTXFSIZ(i)),
+            USB_GET_FIFOSIZE_DEPTH(USB_DIEPTXFSIZ(i)));
+    }
+
+    /* flush the fifos */
+    usb_flush_tx_fifos(0x10); /* flush all */
+    usb_flush_rx_fifo();
+
+    /* flush learning queue */
+    USB_GRSTCTL |= USB_GRSTCTL_intknqflsh;
+
+    /* Clear all pending device interrupts */
+    USB_DIEPMSK = 0;
+    USB_DOEPMSK = 0;
+    USB_DAINT = 0xffffffff;
+    USB_DAINTMSK = 0;
+
+    for(i = 0; i <= usb_num_in_ep; i++)
+    {
+        /* disable endpoint if enabled */
+        if(USB_DIEPCTL(i) & USB_DEPCTL_epena)
+            USB_DIEPCTL(i) = USB_DEPCTL_epdis | USB_DEPCTL_snak;
+        else
+            USB_DIEPCTL(i) = 0;
+
+        USB_DIEPTSIZ(i) = 0;
+        USB_DIEPDMA(i) = 0;
+        USB_DIEPINT(i) = 0xff;
+    }
+
+    for(i = 0; i <= usb_num_out_ep; i++)
+    {
+        /* disable endpoint if enabled */
+        if(USB_DOEPCTL(i) & USB_DEPCTL_epena)
+            USB_DOEPCTL(i) = USB_DEPCTL_epdis | USB_DEPCTL_snak;
+        else
+            USB_DOEPCTL(i) = 0;
+
+        USB_DOEPTSIZ(i) = 0;
+        USB_DOEPDMA(i) = 0;
+        USB_DOEPINT(i) = 0xff;
+    }
+}
+
+static void core_dev_init(void)
+{
+    /* Restart the phy clock */
+    USB_PCGCCTL = 0;
+    /* Set phy speed : high speed */
+    USB_DCFG = (USB_DCFG & (~USB_DCFG_devspd_bits)) | USB_DCFG_devspd_hs_phy_hs;
+    /* Set periodic frame interval */
+    USB_DCFG = (USB_DCFG & (~USB_DCFG_perfrint_bits)) | (USB_DCFG_FRAME_INTERVAL_80 << USB_DCFG_perfrint_bit_pos);
+    /* Configure data fifo size */
 }
 
 static void core_init(void)
@@ -169,6 +328,12 @@ static void core_init(void)
     USB_GAHBCFG |= USB_GAHBCFG_dma_enable;
     /* Disable HNP and SRP, not sure it's useful because we already forced dev mode */
     USB_GUSBCFG &= ~(USB_GUSBCFG_SRP_cap | USB_GUSBCFG_HNP_cap);
+
+    /* enable basic interrupts */
+    usb_enable_common_interrupts();
+
+    /* perform device model specific init */
+    core_dev_init();
 }
 
 void usb_drv_init(void)