Issue#4250: Fix USB driver for Kinetis devices

Move memory allocation to be done at a different location. Currently allocated
in a function that is called from the interrupt handler.

Signed-off-by: Mahadevan Mahesh <[email protected]>

Author: mmahadevan108

features/unsupported/USBDevice/USBDevice/USBEndpoints_KL25Z.h

@@ -16,7 +16,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-#define NUMBER_OF_LOGICAL_ENDPOINTS (16)
+#define NUMBER_OF_LOGICAL_ENDPOINTS (4)
 #define NUMBER_OF_PHYSICAL_ENDPOINTS (NUMBER_OF_LOGICAL_ENDPOINTS * 2)
 
 /* Define physical endpoint numbers */
@@ -31,49 +31,13 @@
 #define EP2IN       (5)
 #define EP3OUT      (6)
 #define EP3IN       (7)
-#define EP4OUT      (8)
-#define EP4IN       (9)
-#define EP5OUT      (10)
-#define EP5IN       (11)
-#define EP6OUT      (12)
-#define EP6IN       (13)
-#define EP7OUT      (14)
-#define EP7IN       (15)
-#define EP8OUT      (16)
-#define EP8IN       (17)
-#define EP9OUT      (18)
-#define EP9IN       (19)
-#define EP10OUT     (20)
-#define EP10IN      (21)
-#define EP11OUT     (22)
-#define EP11IN      (23)
-#define EP12OUT     (24)
-#define EP12IN      (25)
-#define EP13OUT     (26)
-#define EP13IN      (27)
-#define EP14OUT     (28)
-#define EP14IN      (29)
-#define EP15OUT     (30)
-#define EP15IN      (31)
 
 /* Maximum Packet sizes */
 
 #define MAX_PACKET_SIZE_EP0  (64)
 #define MAX_PACKET_SIZE_EP1  (64)
 #define MAX_PACKET_SIZE_EP2  (64)
 #define MAX_PACKET_SIZE_EP3  (1023)
-#define MAX_PACKET_SIZE_EP4  (64)
-#define MAX_PACKET_SIZE_EP5  (64)
-#define MAX_PACKET_SIZE_EP6  (64)
-#define MAX_PACKET_SIZE_EP7  (64)
-#define MAX_PACKET_SIZE_EP8  (64)
-#define MAX_PACKET_SIZE_EP9  (64)
-#define MAX_PACKET_SIZE_EP10 (64)
-#define MAX_PACKET_SIZE_EP11 (64)
-#define MAX_PACKET_SIZE_EP12 (64)
-#define MAX_PACKET_SIZE_EP13 (64)
-#define MAX_PACKET_SIZE_EP14 (64)
-#define MAX_PACKET_SIZE_EP15 (64)
 
 /* Generic endpoints - intended to be portable accross devices */
 /* and be suitable for simple USB devices. */

features/unsupported/USBDevice/USBDevice/USBHAL_KL25Z.cpp

@@ -64,14 +64,12 @@ typedef struct BDT {
     uint32_t  address;    // Addr
 } BDT;
 
-
 // there are:
-//    * 16 bidirectionnal endpt -> 32 physical endpt
-//    * as there are ODD and EVEN buffer -> 32*2 bdt
+//    * 4 bidirectionnal endpt -> 8 physical endpt
+//    * as there are ODD and EVEN buffer -> 8*2 bdt
 MBED_ALIGN(512) BDT bdt[NUMBER_OF_PHYSICAL_ENDPOINTS * 2];  // 512 bytes aligned!
 
-uint8_t * endpoint_buffer[(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2];
-uint8_t * endpoint_buffer_iso[2*2];
+uint8_t * endpoint_buffer[NUMBER_OF_PHYSICAL_ENDPOINTS * 2];
 
 static uint8_t set_addr = 0;
 static uint8_t addr = 0;
@@ -102,28 +100,6 @@ USBHAL::USBHAL(void) {
     epCallback[5] = &USBHAL::EP3_IN_callback;
     epCallback[6] = &USBHAL::EP4_OUT_callback;
     epCallback[7] = &USBHAL::EP4_IN_callback;
-    epCallback[8] = &USBHAL::EP5_OUT_callback;
-    epCallback[9] = &USBHAL::EP5_IN_callback;
-    epCallback[10] = &USBHAL::EP6_OUT_callback;
-    epCallback[11] = &USBHAL::EP6_IN_callback;
-    epCallback[12] = &USBHAL::EP7_OUT_callback;
-    epCallback[13] = &USBHAL::EP7_IN_callback;
-    epCallback[14] = &USBHAL::EP8_OUT_callback;
-    epCallback[15] = &USBHAL::EP8_IN_callback;
-    epCallback[16] = &USBHAL::EP9_OUT_callback;
-    epCallback[17] = &USBHAL::EP9_IN_callback;
-    epCallback[18] = &USBHAL::EP10_OUT_callback;
-    epCallback[19] = &USBHAL::EP10_IN_callback;
-    epCallback[20] = &USBHAL::EP11_OUT_callback;
-    epCallback[21] = &USBHAL::EP11_IN_callback;
-    epCallback[22] = &USBHAL::EP12_OUT_callback;
-    epCallback[23] = &USBHAL::EP12_IN_callback;
-    epCallback[24] = &USBHAL::EP13_OUT_callback;
-    epCallback[25] = &USBHAL::EP13_IN_callback;
-    epCallback[26] = &USBHAL::EP14_OUT_callback;
-    epCallback[27] = &USBHAL::EP14_IN_callback;
-    epCallback[28] = &USBHAL::EP15_OUT_callback;
-    epCallback[29] = &USBHAL::EP15_IN_callback;
 
 #if defined(TARGET_KL43Z) || defined(TARGET_K22F) || defined(TARGET_K64F)
     // enable USBFS clock
@@ -161,6 +137,10 @@ USBHAL::USBHAL(void) {
     USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);
 
     USB0->USBTRC0 |= 0x40;
+
+    /* Allocate control endpoint buffers */
+    endpoint_buffer[EP_BDT_IDX(0, TX, ODD)] = (uint8_t *)malloc(MAX_PACKET_SIZE_EP0);
+    endpoint_buffer[EP_BDT_IDX(0, RX, ODD)] = (uint8_t *)malloc(MAX_PACKET_SIZE_EP0);
 }
 
 USBHAL::~USBHAL(void) { }
@@ -170,6 +150,15 @@ void USBHAL::connect(void) {
     USB0->CTL |= USB_CTL_USBENSOFEN_MASK;
     // Pull up enable
     USB0->CONTROL |= USB_CONTROL_DPPULLUPNONOTG_MASK;
+
+    // Allocate endpoint buffers; do allocate control endpoint buffers
+    for (int i = 4; i < (NUMBER_OF_PHYSICAL_ENDPOINTS * 2); i++) {
+        if ((i == EPISO_OUT) || (i == EPISO_IN)) {
+            endpoint_buffer[i] = (uint8_t *)malloc(MAX_PACKET_SIZE_EPISO);
+        } else {
+            endpoint_buffer[i] = (uint8_t *)malloc(MAX_PACKET_SIZE_EPBULK);
+        }
+    }
 }
 
 void USBHAL::disconnect(void) {
@@ -178,15 +167,11 @@ void USBHAL::disconnect(void) {
     // Pull up disable
     USB0->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
 
-    //Free buffers if required:
-    for (int i = 0; i<(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2; i++) {
+    //Free buffers if required; do not free the control endpoint buffers
+    for (int i = 4; i < (NUMBER_OF_PHYSICAL_ENDPOINTS * 2); i++) {
         free(endpoint_buffer[i]);
         endpoint_buffer[i] = NULL;
     }
-    free(endpoint_buffer_iso[2]);
-    endpoint_buffer_iso[2] = NULL;
-    free(endpoint_buffer_iso[0]);
-    endpoint_buffer_iso[0] = NULL;
 }
 
 void USBHAL::configureDevice(void) {
@@ -217,25 +202,12 @@ bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flag
 
     if ((flags & ISOCHRONOUS) == 0) {
         handshake_flag = USB_ENDPT_EPHSHK_MASK;
-        if (IN_EP(endpoint)) {
-            if (endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] == NULL)
-                endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] = (uint8_t *) malloc (64);
-            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
-        } else {
-            if (endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] == NULL)
-                endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] = (uint8_t *) malloc (64);
-            buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
-        }
+    }
+
+    if (IN_EP(endpoint)) {
+        buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
     } else {
-        if (IN_EP(endpoint)) {
-            if (endpoint_buffer_iso[2] == NULL)
-                endpoint_buffer_iso[2] = (uint8_t *) malloc (1023);
-            buf = &endpoint_buffer_iso[2][0];
-        } else {
-            if (endpoint_buffer_iso[0] == NULL)
-                endpoint_buffer_iso[0] = (uint8_t *) malloc (1023);
-            buf = &endpoint_buffer_iso[0][0];
-        }
+        buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
     }
 
     // IN endpt -> device to host (TX)
@@ -329,12 +301,7 @@ EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_
         setup = 1;
     }
 
-    // non iso endpoint
-    if (not_iso) {
-        ep_buf = endpoint_buffer[idx];
-    } else {
-        ep_buf = endpoint_buffer_iso[0];
-    }
+    ep_buf = endpoint_buffer[idx];
 
     for (n = 0; n < sz; n++) {
         buffer[n] = ep_buf[n];
@@ -377,13 +344,7 @@ EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size)
     idx = EP_BDT_IDX(PHY_TO_LOG(endpoint), TX, 0);
     bdt[idx].byte_count = size;
 
-
-    // non iso endpoint
-    if (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPHSHK_MASK) {
-        ep_buf = endpoint_buffer[idx];
-    } else {
-        ep_buf = endpoint_buffer_iso[2];
-    }
+    ep_buf = endpoint_buffer[idx];
 
     for (n = 0; n < size; n++) {
         ep_buf[n] = data[n];