hide driver functions

8 files changed, 116 insertions, 116 deletions

diff --git a/src/usbd_stm32f103_devfs.c b/src/usbd_stm32f103_devfs.c
index 56ab8ac..312a881 100644
--- a/src/usbd_stm32f103_devfs.c
+++ b/src/usbd_stm32f103_devfs.c
@@ -156,7 +156,7 @@ static uint16_t get_next_pma(uint16_t sz) {
     return (_result < (0x020 + sz)) ? 0 : (_result - sz);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->APB1ENR & RCC_APB1ENR_USBEN)) return STATUS_VAL(0);
 #if defined(USBD_DP_PORT) && defined(USBD_DP_PIN)
     if (USBD_DP_PORT->IDR & _BV(USBD_DP_PIN)) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
@@ -166,7 +166,7 @@ uint32_t getinfo(void) {
 #endif
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     volatile uint16_t *reg = EPR(ep);
     /* ISOCHRONOUS endpoint can't be stalled or unstalled */
     if (USB_EP_ISOCHRONOUS == (*reg & USB_EP_T_FIELD)) return;
@@ -203,7 +203,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         return (USB_EP_TX_STALL == (USB_EPTX_STAT & *EPR(ep)));
     } else {
@@ -211,7 +211,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
 #if defined(USBD_DP_PORT) && defined(USBD_DP_PIN) && defined(STM32F3)
     uint32_t _t = USBD_DP_PORT->MODER & ~(0x03 << (2 * USBD_DP_PIN));
     if (connect) {
@@ -243,7 +243,7 @@ uint8_t connect(bool connect) {
     return usbd_lane_unk;
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         set_gpiox();
         RCC->APB1ENR  |= RCC_APB1ENR_USBEN;
@@ -262,11 +262,11 @@ void enable(bool enable) {
     }
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     USB->DADDR = USB_DADDR_EF | addr;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     volatile uint16_t *reg = EPR(ep);
     pma_table *tbl = EPT(ep);
     /* epsize should be 16-bit aligned */
@@ -337,7 +337,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     pma_table *ept = EPT(ep);
     *EPR(ep) &= ~USB_EPREG_MASK;
     ept->rx.addr = 0;
@@ -366,7 +366,7 @@ static uint16_t pma_read (uint8_t *buf, uint16_t blen, pma_rec *rx) {
     return rxcnt;
 }
 
-int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPRX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -423,7 +423,7 @@ static void pma_write(const uint8_t *buf, uint16_t blen, pma_rec *tx) {
     }
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPTX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -458,11 +458,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return USB->FNR & USB_FNR_FN;
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint8_t _ev, _ep;
     uint16_t _istr = USB->ISTR;
     _ep = _istr & USB_ISTR_EP_ID;
@@ -515,7 +515,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32f105_otgfs.c b/src/usbd_stm32f105_otgfs.c
index 490f44c..54530da 100644
--- a/src/usbd_stm32f105_otgfs.c
+++ b/src/usbd_stm32f105_otgfs.c
@@ -30,9 +30,9 @@
 
 #define STATUS_VAL(x)   (USBD_HW_ADDRFST | (x))
 
-USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
-USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
-volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
+static USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
+static USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
+static volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
 
 
 inline static uint32_t* EPFIFO(uint32_t ep) {
@@ -58,13 +58,13 @@ inline static void Flush_TX(uint8_t ep) {
     _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFFLSH);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->AHBENR & RCC_AHBENR_OTGFSEN)) return STATUS_VAL(0);
     if (!(OTGD->DCTL & USB_OTG_DCTL_SDIS)) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     if (ep & 0x80) {
         ep &= 0x7F;
         uint32_t _t = EPIN(ep)->DIEPCTL;
@@ -91,7 +91,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         ep &= 0x7F;
         return (EPIN(ep)->DIEPCTL & USB_OTG_DIEPCTL_STALL) ? true : false;
@@ -100,7 +100,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         /* enabling USB_OTG in RCC */
         _BST(RCC->AHBENR, RCC_AHBENR_OTGFSEN);
@@ -154,7 +154,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     if (connect) {
 /* The ST made a strange thing again. Really i dont'understand what is the reason to name
    signal as PWRDWN (Power down PHY) when it works as "Power up" */
@@ -167,7 +167,7 @@ uint8_t connect(bool connect) {
     return usbd_lane_unk;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     _BMD(OTGD->DCFG, USB_OTG_DCFG_DAD, addr << 4);
 }
 
@@ -203,7 +203,7 @@ static bool set_tx_fifo(uint8_t ep, uint16_t epsize) {
     return true;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     if (ep == 0) {
         /* configuring control endpoint EP0 */
         uint32_t mpsize;
@@ -291,7 +291,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     ep &= 0x7F;
     volatile USB_OTG_INEndpointTypeDef*  epi = EPIN(ep);
     volatile USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
@@ -320,7 +320,7 @@ void ep_deconfig(uint8_t ep) {
     epo->DOEPINT = 0xFF;
 }
 
-int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     uint32_t len, tmp;
     volatile uint32_t *fifo = EPFIFO(0);
     /* no data in RX FIFO */
@@ -341,7 +341,7 @@ int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     return (len < blen) ? len : blen;
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t* fifo = EPFIFO(ep);
@@ -368,11 +368,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return _FLD2VAL(USB_OTG_DSTS_FNSOF, OTGD->DSTS);
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint32_t evt;
     uint32_t ep = 0;
     while (1) {
@@ -449,7 +449,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32f429_otgfs.c b/src/usbd_stm32f429_otgfs.c
index c68c6c1..1633e04 100644
--- a/src/usbd_stm32f429_otgfs.c
+++ b/src/usbd_stm32f429_otgfs.c
@@ -29,9 +29,9 @@
 
 #define STATUS_VAL(x)   (USBD_HW_ADDRFST | (x))
 
-USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
-USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
-volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
+static USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
+static USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
+static volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
 
 
 inline static uint32_t* EPFIFO(uint32_t ep) {
@@ -57,13 +57,13 @@ inline static void Flush_TX(uint8_t ep) {
     _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFFLSH);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->AHB2ENR & RCC_AHB2ENR_OTGFSEN)) return STATUS_VAL(0);
     if (!(OTGD->DCTL & USB_OTG_DCTL_SDIS)) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     if (ep & 0x80) {
         ep &= 0x7F;
         uint32_t _t = EPIN(ep)->DIEPCTL;
@@ -90,7 +90,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         ep &= 0x7F;
         return (EPIN(ep)->DIEPCTL & USB_OTG_DIEPCTL_STALL) ? true : false;
@@ -99,7 +99,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         /* enabling USB_OTG in RCC */
         _BST(RCC->AHB2ENR, RCC_AHB2ENR_OTGFSEN);
@@ -152,7 +152,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     if (connect) {
 /* The ST made a strange thing again. Really i dont'understand what is the reason to name
    signal as PWRDWN (Power down PHY) when it works as "Power up" */
@@ -165,7 +165,7 @@ uint8_t connect(bool connect) {
     return usbd_lane_unk;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     _BMD(OTGD->DCFG, USB_OTG_DCFG_DAD, addr << 4);
 }
 
@@ -201,7 +201,7 @@ static bool set_tx_fifo(uint8_t ep, uint16_t epsize) {
     return true;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     if (ep == 0) {
         /* configureing control endpoint EP0 */
         uint32_t mpsize;
@@ -288,7 +288,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     ep &= 0x7F;
     volatile USB_OTG_INEndpointTypeDef*  epi = EPIN(ep);
     volatile USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
@@ -317,7 +317,7 @@ void ep_deconfig(uint8_t ep) {
     epo->DOEPINT = 0xFF;
 }
 
-int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     uint32_t len, tmp;
     volatile uint32_t *fifo = EPFIFO(0);
     /* no data in RX FIFO */
@@ -338,7 +338,7 @@ int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     return (len < blen) ? len : blen;
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t* fifo = EPFIFO(ep);
@@ -365,11 +365,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return _FLD2VAL(USB_OTG_DSTS_FNSOF, OTGD->DSTS);
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint32_t evt;
     uint32_t ep = 0;
     while (1) {
@@ -446,7 +446,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32f446_otgfs.c b/src/usbd_stm32f446_otgfs.c
index 0ad389a..93cb2c3 100644
--- a/src/usbd_stm32f446_otgfs.c
+++ b/src/usbd_stm32f446_otgfs.c
@@ -29,9 +29,9 @@
 
 #define STATUS_VAL(x)   (USBD_HW_ADDRFST | (x))
 
-USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
-USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
-volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
+static USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
+static USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
+static volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
 
 
 inline static uint32_t* EPFIFO(uint32_t ep) {
@@ -57,13 +57,13 @@ inline static void Flush_TX(uint8_t ep) {
     _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFFLSH);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->AHB2ENR & RCC_AHB2ENR_OTGFSEN)) return STATUS_VAL(0);
     if (!(OTGD->DCTL & USB_OTG_DCTL_SDIS)) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     if (ep & 0x80) {
         ep &= 0x7F;
         uint32_t _t = EPIN(ep)->DIEPCTL;
@@ -90,7 +90,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         ep &= 0x7F;
         return (EPIN(ep)->DIEPCTL & USB_OTG_DIEPCTL_STALL) ? true : false;
@@ -99,7 +99,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         /* enabling USB_OTG in RCC */
         _BST(RCC->AHB2ENR, RCC_AHB2ENR_OTGFSEN);
@@ -147,7 +147,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     if (connect) {
         _BCL(OTGD->DCTL, USB_OTG_DCTL_SDIS);
     } else {
@@ -156,7 +156,7 @@ uint8_t connect(bool connect) {
     return usbd_lane_unk;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     _BMD(OTGD->DCFG, USB_OTG_DCFG_DAD, addr << 4);
 }
 
@@ -192,7 +192,7 @@ static bool set_tx_fifo(uint8_t ep, uint16_t epsize) {
     return true;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     if (ep == 0) {
         /* configureing control endpoint EP0 */
         uint32_t mpsize;
@@ -279,7 +279,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     ep &= 0x7F;
     volatile USB_OTG_INEndpointTypeDef*  epi = EPIN(ep);
     volatile USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
@@ -308,7 +308,7 @@ void ep_deconfig(uint8_t ep) {
     epo->DOEPINT = 0xFF;
 }
 
-int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t *fifo = EPFIFO(0);
@@ -331,7 +331,7 @@ int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     return (len < blen) ? len : blen;
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t* fifo = EPFIFO(ep);
@@ -358,11 +358,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return _FLD2VAL(USB_OTG_DSTS_FNSOF, OTGD->DSTS);
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint32_t evt;
     uint32_t ep = 0;
     while (1) {
@@ -431,7 +431,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32l052_devfs.c b/src/usbd_stm32l052_devfs.c
index 8b44339..e6b7f71 100644
--- a/src/usbd_stm32l052_devfs.c
+++ b/src/usbd_stm32l052_devfs.c
@@ -92,13 +92,13 @@ static uint16_t get_next_pma(uint16_t sz) {
     return (_result < (0x020 + sz)) ? 0 : (_result - sz);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->APB1ENR & RCC_APB1ENR_USBEN)) return STATUS_VAL(0);
     if (USB->BCDR & USB_BCDR_DPPU) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     volatile uint16_t *reg = EPR(ep);
     /* ISOCHRONOUS endpoint can't be stalled or unstalled */
     if (USB_EP_ISOCHRONOUS == (*reg & USB_EP_T_FIELD)) return;
@@ -135,7 +135,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         return (USB_EP_TX_STALL == (USB_EPTX_STAT & *EPR(ep)));
     } else {
@@ -143,7 +143,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         RCC->APB1ENR  |=  RCC_APB1ENR_USBEN;
         RCC->APB1RSTR |= RCC_APB1RSTR_USBRST;
@@ -164,7 +164,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     uint8_t res;
     USB->BCDR = USB_BCDR_BCDEN | USB_BCDR_DCDEN;
     if (USB->BCDR & USB_BCDR_DCDET) {
@@ -188,11 +188,11 @@ uint8_t connect(bool connect) {
     return res;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     USB->DADDR = USB_DADDR_EF | addr;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     volatile uint16_t *reg = EPR(ep);
     pma_table *tbl = EPT(ep);
     /* epsize should be 16-bit aligned */
@@ -263,7 +263,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     pma_table *ept = EPT(ep);
     *EPR(ep) &= ~USB_EPREG_MASK;
     ept->rx.addr = 0;
@@ -291,7 +291,7 @@ static uint16_t pma_read (uint8_t *buf, uint16_t blen, pma_rec *rx) {
     return rxcnt;
 }
 
-int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPRX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -347,7 +347,7 @@ static void pma_write(uint8_t *buf, uint16_t blen, pma_rec *tx) {
     }
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPTX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -382,11 +382,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return USB->FNR & USB_FNR_FN;
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint8_t _ev, _ep;
     uint16_t _istr = USB->ISTR;
     _ep = _istr & USB_ISTR_EP_ID;
@@ -438,7 +438,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32l100_devfs.c b/src/usbd_stm32l100_devfs.c
index 48611fb..c2c978f 100644
--- a/src/usbd_stm32l100_devfs.c
+++ b/src/usbd_stm32l100_devfs.c
@@ -93,13 +93,13 @@ static uint16_t get_next_pma(uint16_t sz) {
     return (_result < (0x020 + sz)) ? 0 : (_result - sz);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->APB1ENR & RCC_APB1ENR_USBEN)) return STATUS_VAL(0);
     if (SYSCFG->PMC & SYSCFG_PMC_USB_PU) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     volatile uint16_t *reg = EPR(ep);
     /* ISOCHRONOUS endpoint can't be stalled or unstalled */
     if (USB_EP_ISOCHRONOUS == (*reg & USB_EP_T_FIELD)) return;
@@ -136,7 +136,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         return (USB_EP_TX_STALL == (USB_EPTX_STAT & *EPR(ep)));
     } else {
@@ -144,7 +144,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         RCC->APB1ENR  |= RCC_APB1ENR_USBEN;
         RCC->APB2ENR  |= RCC_APB2ENR_SYSCFGEN;
@@ -162,7 +162,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     if (connect) {
         SYSCFG->PMC |= SYSCFG_PMC_USB_PU;
     } else {
@@ -171,12 +171,12 @@ uint8_t connect(bool connect) {
     return usbd_lane_unk;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     USB->DADDR = USB_DADDR_EF | addr;
 }
 
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     volatile uint16_t *reg = EPR(ep);
     pma_table *tbl = EPT(ep);
     /* epsize should be 16-bit aligned */
@@ -247,7 +247,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     pma_table *ept = EPT(ep);
     *EPR(ep) &= ~USB_EPREG_MASK;
     ept->rx.addr = 0;
@@ -275,7 +275,7 @@ static uint16_t pma_read (uint8_t *buf, uint16_t blen, pma_rec *rx) {
     return rxcnt;
 }
 
-int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPRX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -331,7 +331,7 @@ static void pma_write(const uint8_t *buf, uint16_t blen, pma_rec *tx) {
     }
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPTX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -366,11 +366,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return USB->FNR & USB_FNR_FN;
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint8_t _ev, _ep;
     uint16_t _istr = USB->ISTR;
     _ep = _istr & USB_ISTR_EP_ID;
@@ -423,7 +423,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32l433_devfs.c b/src/usbd_stm32l433_devfs.c
index 677e62a..538de90 100644
--- a/src/usbd_stm32l433_devfs.c
+++ b/src/usbd_stm32l433_devfs.c
@@ -97,13 +97,13 @@ static uint16_t get_next_pma(uint16_t sz) {
     return (_result < (0x020 + sz)) ? 0 : (_result - sz);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->APB1ENR1 & RCC_APB1ENR1_USBFSEN)) return STATUS_VAL(0);
     if (USB->BCDR & USB_BCDR_DPPU) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     volatile uint16_t *reg = EPR(ep);
     /* ISOCHRONOUS endpoint can't be stalled or unstalled */
     if (USB_EP_ISOCHRONOUS == (*reg & USB_EP_T_FIELD)) return;
@@ -140,7 +140,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         return (USB_EP_TX_STALL == (USB_EPTX_STAT & *EPR(ep)));
     } else {
@@ -148,7 +148,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         RCC->APB1ENR1  |=  RCC_APB1ENR1_USBFSEN;
         RCC->APB1RSTR1 |= RCC_APB1RSTR1_USBFSRST;
@@ -165,7 +165,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     uint8_t res;
     USB->BCDR = USB_BCDR_BCDEN | USB_BCDR_DCDEN;
     if (USB->BCDR & USB_BCDR_DCDET) {
@@ -189,11 +189,11 @@ uint8_t connect(bool connect) {
     return res;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     USB->DADDR = USB_DADDR_EF | addr;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     volatile uint16_t *reg = EPR(ep);
     pma_table *tbl = EPT(ep);
     /* epsize should be 16-bit aligned */
@@ -264,7 +264,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     pma_table *ept = EPT(ep);
     *EPR(ep) &= ~USB_EPREG_MASK;
     ept->rx.addr = 0;
@@ -294,7 +294,7 @@ static uint16_t pma_read (uint8_t *buf, uint16_t blen, pma_rec *rx) {
     return rxcnt;
 }
 
-int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPRX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -348,7 +348,7 @@ static void pma_write(uint8_t *buf, uint16_t blen, pma_rec *tx) {
     if (blen) *pma = *buf;
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     pma_table *tbl = EPT(ep);
     volatile uint16_t *reg = EPR(ep);
     switch (*reg & (USB_EPTX_STAT | USB_EP_T_FIELD | USB_EP_KIND)) {
@@ -383,11 +383,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return USB->FNR & USB_FNR_FN;
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint8_t _ev, _ep;
     uint16_t _istr = USB->ISTR;
     _ep = _istr & USB_ISTR_EP_ID;
@@ -439,7 +439,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;
diff --git a/src/usbd_stm32l476_otgfs.c b/src/usbd_stm32l476_otgfs.c
index 183d2f5..a0246b5 100644
--- a/src/usbd_stm32l476_otgfs.c
+++ b/src/usbd_stm32l476_otgfs.c
@@ -29,9 +29,9 @@
 
 #define STATUS_VAL(x)   (USBD_HW_BC | USBD_HW_ADDRFST | (x))
 
-USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
-USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
-volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
+static USB_OTG_GlobalTypeDef * const OTG  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_GLOBAL_BASE);
+static USB_OTG_DeviceTypeDef * const OTGD = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_DEVICE_BASE);
+static volatile uint32_t * const OTGPCTL  = (void*)(USB_OTG_FS_PERIPH_BASE + USB_OTG_PCGCCTL_BASE);
 
 
 inline static uint32_t* EPFIFO(uint32_t ep) {
@@ -57,13 +57,13 @@ inline static void Flush_TX(uint8_t ep) {
     _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_TXFFLSH);
 }
 
-uint32_t getinfo(void) {
+static uint32_t getinfo(void) {
     if (!(RCC->AHB2ENR & RCC_AHB2ENR_OTGFSEN)) return STATUS_VAL(0);
     if (!(OTGD->DCTL & USB_OTG_DCTL_SDIS)) return STATUS_VAL(USBD_HW_ENABLED | USBD_HW_SPEED_FS);
     return STATUS_VAL(USBD_HW_ENABLED);
 }
 
-void ep_setstall(uint8_t ep, bool stall) {
+static void ep_setstall(uint8_t ep, bool stall) {
     if (ep & 0x80) {
         ep &= 0x7F;
         uint32_t _t = EPIN(ep)->DIEPCTL;
@@ -90,7 +90,7 @@ void ep_setstall(uint8_t ep, bool stall) {
     }
 }
 
-bool ep_isstalled(uint8_t ep) {
+static bool ep_isstalled(uint8_t ep) {
     if (ep & 0x80) {
         ep &= 0x7F;
         return (EPIN(ep)->DIEPCTL & USB_OTG_DIEPCTL_STALL) ? true : false;
@@ -99,7 +99,7 @@ bool ep_isstalled(uint8_t ep) {
     }
 }
 
-void enable(bool enable) {
+static void enable(bool enable) {
     if (enable) {
         /* enabling USB_OTG in RCC */
         _BST(RCC->AHB2ENR, RCC_AHB2ENR_OTGFSEN);
@@ -155,7 +155,7 @@ void enable(bool enable) {
     }
 }
 
-uint8_t connect(bool connect) {
+static uint8_t connect(bool connect) {
     uint8_t res;
 #if defined(USBD_VBUS_DETECT)
     #define SET_GCCFG(x) OTG->GCCFG = USB_OTG_GCCFG_VBDEN | (x)
@@ -189,7 +189,7 @@ uint8_t connect(bool connect) {
     return res;
 }
 
-void setaddr (uint8_t addr) {
+static void setaddr (uint8_t addr) {
     _BMD(OTGD->DCFG, USB_OTG_DCFG_DAD, addr << 4);
 }
 
@@ -225,7 +225,7 @@ static bool set_tx_fifo(uint8_t ep, uint16_t epsize) {
     return true;
 }
 
-bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
+static bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     if (ep == 0) {
         /* configureing control endpoint EP0 */
         uint32_t mpsize;
@@ -312,7 +312,7 @@ bool ep_config(uint8_t ep, uint8_t eptype, uint16_t epsize) {
     return true;
 }
 
-void ep_deconfig(uint8_t ep) {
+static void ep_deconfig(uint8_t ep) {
     ep &= 0x7F;
     volatile USB_OTG_INEndpointTypeDef*  epi = EPIN(ep);
     volatile USB_OTG_OUTEndpointTypeDef* epo = EPOUT(ep);
@@ -341,7 +341,7 @@ void ep_deconfig(uint8_t ep) {
     epo->DOEPINT = 0xFF;
 }
 
-int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
+static int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t *fifo = EPFIFO(0);
@@ -364,7 +364,7 @@ int32_t ep_read(uint8_t ep, void* buf, uint16_t blen) {
     return (len < blen) ? len : blen;
 }
 
-int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
+static int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     uint32_t len, tmp;
     ep &= 0x7F;
     volatile uint32_t* fifo = EPFIFO(ep);
@@ -391,11 +391,11 @@ int32_t ep_write(uint8_t ep, void *buf, uint16_t blen) {
     return blen;
 }
 
-uint16_t get_frame (void) {
+static uint16_t get_frame (void) {
     return _FLD2VAL(USB_OTG_DSTS_FNSOF, OTGD->DSTS);
 }
 
-void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
+static void evt_poll(usbd_device *dev, usbd_evt_callback callback) {
     uint32_t evt;
     uint32_t ep = 0;
     while (1) {
@@ -464,7 +464,7 @@ static uint32_t fnv1a32_turn (uint32_t fnv, uint32_t data ) {
     return fnv;
 }
 
-uint16_t get_serialno_desc(void *buffer) {
+static uint16_t get_serialno_desc(void *buffer) {
     struct  usb_string_descriptor *dsc = buffer;
     uint16_t *str = dsc->wString;
     uint32_t fnv = 2166136261;