(1 << STM_USB_EPR_EP_KIND) | \
(STM_USB_EPR_EA_MASK << STM_USB_EPR_EA))
+#define TX_DBG 0
+#define RX_DBG 0
+
+#if TX_DBG
+#define _tx_dbg0(msg) _dbg(__LINE__,msg,0)
+#define _tx_dbg1(msg,value) _dbg(__LINE__,msg,value)
+#else
+#define _tx_dbg0(msg)
+#define _tx_dbg1(msg,value)
+#endif
+
+#if RX_DBG
+#define _rx_dbg0(msg) _dbg(__LINE__,msg,0)
+#define _rx_dbg1(msg,value) _dbg(__LINE__,msg,value)
+#else
+#define _rx_dbg0(msg)
+#define _rx_dbg1(msg,value)
+#endif
+
+#if TX_DBG || RX_DBG
+static void _dbg(int line, char *msg, uint32_t value);
+#endif
+
/*
* Set the state of the specified endpoint register to a new
* value. This is tricky because the bits toggle where the new
{
uint32_t epr_write, epr_old;
+ _tx_dbg1("set_stat_tx top", stat_tx);
epr_old = epr_write = stm_usb.epr[ep];
epr_write &= STM_USB_EPR_PRESERVE_MASK;
epr_write |= STM_USB_EPR_INVARIANT;
STM_USB_EPR_STAT_TX_MASK << STM_USB_EPR_STAT_TX,
stat_tx << STM_USB_EPR_STAT_TX);
stm_usb.epr[ep] = epr_write;
+ _tx_dbg1("set_stat_tx bottom", epr_write);
}
static void
ao_usb_set_stat_tx(int ep, uint32_t stat_tx)
{
- cli();
+ ao_arch_block_interrupts();
_ao_usb_set_stat_tx(ep, stat_tx);
- sei();
+ ao_arch_release_interrupts();
}
static void
-ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
+_ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
uint32_t epr_write, epr_old;
- cli();
epr_write = epr_old = stm_usb.epr[ep];
epr_write &= STM_USB_EPR_PRESERVE_MASK;
epr_write |= STM_USB_EPR_INVARIANT;
STM_USB_EPR_STAT_RX_MASK << STM_USB_EPR_STAT_RX,
stat_rx << STM_USB_EPR_STAT_RX);
stm_usb.epr[ep] = epr_write;
- sei();
+}
+
+static void
+ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
+ ao_arch_block_interrupts();
+ _ao_usb_set_stat_rx(ep, stat_rx);
+ ao_arch_release_interrupts();
}
/*
ao_usb_init_ep(uint8_t ep, uint32_t addr, uint32_t type, uint32_t stat_rx, uint32_t stat_tx)
{
uint32_t epr;
- cli();
+ ao_arch_block_interrupts();
epr = stm_usb.epr[ep];
epr = ((0 << STM_USB_EPR_CTR_RX) |
(epr & (1 << STM_USB_EPR_DTOG_RX)) |
(stat_tx << STM_USB_EPR_STAT_TX)) |
(addr << STM_USB_EPR_EA));
stm_usb.epr[ep] = epr;
- sei();
+ ao_arch_release_interrupts();
debug ("writing epr[%d] 0x%08x wrote 0x%08x\n",
ep, epr, stm_usb.epr[ep]);
}
STM_USB_EPR_EP_TYPE_INTERRUPT,
STM_USB_EPR_STAT_RX_DISABLED,
STM_USB_EPR_STAT_TX_NAK);
-
+
/* Set up the OUT end point */
ao_usb_bdt[AO_USB_OUT_EPR].single.addr_rx = ao_usb_sram_addr;
ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
STM_USB_EPR_EP_TYPE_BULK,
STM_USB_EPR_STAT_RX_VALID,
STM_USB_EPR_STAT_TX_DISABLED);
-
+
/* Set up the IN end point */
ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_sram_addr;
ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = 0;
case AO_USB_OUT_EPR:
++out_count;
if (ao_usb_epr_ctr_rx(epr)) {
+ _rx_dbg1("RX ISR", epr);
ao_usb_out_avail = 1;
+ _rx_dbg0("out avail set");
ao_wakeup(&ao_stdin_ready);
+ _rx_dbg0("stdin awoken");
}
break;
case AO_USB_IN_EPR:
++in_count;
+ _tx_dbg1("TX ISR", epr);
if (ao_usb_epr_ctr_tx(epr)) {
ao_usb_in_pending = 0;
ao_wakeup(&ao_usb_in_pending);
ao_sleep(&ao_usb_ep0_receive);
ao_usb_ep0_receive = 0;
);
-
+
if (receive & AO_USB_EP0_GOT_RESET) {
debug ("\treset\n");
ao_usb_set_ep0();
/* Queue the current IN buffer for transmission */
static void
-ao_usb_in_send(void)
+_ao_usb_in_send(void)
{
+ _tx_dbg0("in_send start");
debug ("send %d\n", ao_usb_tx_count);
+ while (ao_usb_in_pending)
+ ao_sleep(&ao_usb_in_pending);
+ ao_usb_in_pending = 1;
+ if (ao_usb_tx_count != AO_USB_IN_SIZE)
+ ao_usb_in_flushed = 1;
ao_usb_write(ao_usb_tx_buffer, ao_usb_in_tx_buffer, 0, ao_usb_tx_count);
ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = ao_usb_tx_count;
- ao_usb_set_stat_tx(AO_USB_IN_EPR, STM_USB_EPR_STAT_TX_VALID);
- ao_usb_in_pending = 1;
ao_usb_tx_count = 0;
+ _ao_usb_set_stat_tx(AO_USB_IN_EPR, STM_USB_EPR_STAT_TX_VALID);
+ _tx_dbg0("in_send end");
}
-/* Wait for a free IN buffer */
+/* Wait for a free IN buffer. Interrupts are blocked */
static void
-ao_usb_in_wait(void)
+_ao_usb_in_wait(void)
{
for (;;) {
/* Check if the current buffer is writable */
if (ao_usb_tx_count < AO_USB_IN_SIZE)
break;
- cli();
+ _tx_dbg0("in_wait top");
/* Wait for an IN buffer to be ready */
while (ao_usb_in_pending)
ao_sleep(&ao_usb_in_pending);
- sei();
+ _tx_dbg0("in_wait bottom");
}
}
void
-ao_usb_flush(void) __critical
+ao_usb_flush(void)
{
if (!ao_usb_running)
return;
* packet was full, in which case we now
* want to send an empty packet
*/
- if (!ao_usb_in_flushed) {
- ao_usb_in_flushed = 1;
- cli();
- /* Wait for an IN buffer to be ready */
- while (ao_usb_in_pending)
- ao_sleep(&ao_usb_in_pending);
- sei();
- ao_usb_in_send();
+ ao_arch_block_interrupts();
+ while (!ao_usb_in_flushed) {
+ _tx_dbg0("flush top");
+ _ao_usb_in_send();
+ _tx_dbg0("flush end");
}
+ ao_arch_release_interrupts();
}
void
-ao_usb_putchar(char c) __critical __reentrant
+ao_usb_putchar(char c)
{
if (!ao_usb_running)
return;
- ao_usb_in_wait();
+ ao_arch_block_interrupts();
+ _ao_usb_in_wait();
+ ao_usb_in_flushed = 0;
ao_usb_tx_buffer[ao_usb_tx_count++] = (uint8_t) c;
/* Send the packet when full */
- if (ao_usb_tx_count == AO_USB_IN_SIZE)
- ao_usb_in_send();
- ao_usb_in_flushed = 0;
+ if (ao_usb_tx_count == AO_USB_IN_SIZE) {
+ _tx_dbg0("putchar full");
+ _ao_usb_in_send();
+ _tx_dbg0("putchar flushed");
+ }
+ ao_arch_release_interrupts();
}
static void
-ao_usb_out_recv(void)
+_ao_usb_out_recv(void)
{
+ _rx_dbg0("out_recv top");
ao_usb_out_avail = 0;
ao_usb_rx_count = ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx & STM_USB_BDT_COUNT_RX_COUNT_RX_MASK;
+ _rx_dbg1("out_recv count", ao_usb_rx_count);
debug ("recv %d\n", ao_usb_rx_count);
debug_data("Fill OUT len %d:", ao_usb_rx_count);
ao_usb_read(ao_usb_rx_buffer, ao_usb_out_rx_buffer, 0, ao_usb_rx_count);
ao_usb_rx_pos = 0;
/* ACK the packet */
- ao_usb_set_stat_rx(AO_USB_OUT_EPR, STM_USB_EPR_STAT_RX_VALID);
+ _ao_usb_set_stat_rx(AO_USB_OUT_EPR, STM_USB_EPR_STAT_RX_VALID);
}
-static char
+int
_ao_usb_pollchar(void)
{
- char c;
+ uint8_t c;
if (!ao_usb_running)
return AO_READ_AGAIN;
if (ao_usb_rx_pos != ao_usb_rx_count)
break;
+ _rx_dbg0("poll check");
/* Check to see if a packet has arrived */
- if (!ao_usb_out_avail)
+ if (!ao_usb_out_avail) {
+ _rx_dbg0("poll none");
return AO_READ_AGAIN;
- ao_usb_out_recv();
+ }
+ _ao_usb_out_recv();
}
/* Pull a character out of the fifo */
}
char
-ao_usb_pollchar(void)
-{
- char c;
- cli();
- c = _ao_usb_pollchar();
- sei();
- return c;
-}
-
-char
-ao_usb_getchar(void) __critical
+ao_usb_getchar(void)
{
- char c;
+ int c;
- cli();
+ ao_arch_block_interrupts();
while ((c = _ao_usb_pollchar()) == AO_READ_AGAIN)
ao_sleep(&ao_stdin_ready);
- sei();
+ ao_arch_release_interrupts();
return c;
}
void
ao_usb_disable(void)
{
+ ao_arch_block_interrupts();
stm_usb.cntr = (1 << STM_USB_CNTR_FRES);
stm_usb.istr = 0;
/* Disable the interface */
stm_rcc.apb1enr &+ ~(1 << STM_RCC_APB1ENR_USBEN);
+ ao_arch_release_interrupts();
}
void
ao_usb_enable(void)
{
- uint16_t tick;
+ int t;
/* Enable SYSCFG */
stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_SYSCFGEN);
* pulled low and doesn't work at all
*/
+ ao_arch_block_interrupts();
+
/* Route interrupts */
stm_nvic_set_priority(STM_ISR_USB_LP_POS, 3);
stm_nvic_set_enable(STM_ISR_USB_LP_POS);
/* Clear any spurious interrupts */
stm_usb.istr = 0;
-
+
debug ("ao_usb_enable\n");
/* Enable interrupts */
(0 << STM_USB_CNTR_PDWN) |
(0 << STM_USB_CNTR_FRES));
+ ao_arch_release_interrupts();
+
+ for (t = 0; t < 1000; t++)
+ ao_arch_nop();
/* Enable USB pull-up */
stm_syscfg.pmc |= (1 << STM_SYSCFG_PMC_USB_PU);
}
}
#endif
+#if USB_DEBUG
static void
ao_usb_irq(void)
{
{ ao_usb_irq, "I\0Show USB interrupt counts" },
{ 0, NULL }
};
+#endif
void
ao_usb_init(void)
#if USB_ECHO
ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo");
#endif
+#if USB_DEBUG
ao_cmd_register(&ao_usb_cmds[0]);
+#endif
#if !USB_ECHO
- ao_add_stdio(ao_usb_pollchar, ao_usb_putchar, ao_usb_flush);
+ ao_add_stdio(_ao_usb_pollchar, ao_usb_putchar, ao_usb_flush);
#endif
}
+
+#if TX_DBG || RX_DBG
+
+struct ao_usb_dbg {
+ int line;
+ char *msg;
+ uint32_t value;
+ uint32_t primask;
+#if TX_DBG
+ uint16_t in_count;
+ uint32_t in_epr;
+ uint32_t in_pending;
+ uint32_t tx_count;
+ uint32_t in_flushed;
+#endif
+#if RX_DBG
+ uint8_t rx_count;
+ uint8_t rx_pos;
+ uint8_t out_avail;
+ uint32_t out_epr;
+#endif
+};
+
+#define NUM_USB_DBG 128
+
+static struct ao_usb_dbg dbg[128];
+static int dbg_i;
+
+static void _dbg(int line, char *msg, uint32_t value)
+{
+ uint32_t primask;
+ dbg[dbg_i].line = line;
+ dbg[dbg_i].msg = msg;
+ dbg[dbg_i].value = value;
+ asm("mrs %0,primask" : "=&r" (primask));
+ dbg[dbg_i].primask = primask;
+#if TX_DBG
+ dbg[dbg_i].in_count = in_count;
+ dbg[dbg_i].in_epr = stm_usb.epr[AO_USB_IN_EPR];
+ dbg[dbg_i].in_pending = ao_usb_in_pending;
+ dbg[dbg_i].tx_count = ao_usb_tx_count;
+ dbg[dbg_i].in_flushed = ao_usb_in_flushed;
+#endif
+#if RX_DBG
+ dbg[dbg_i].rx_count = ao_usb_rx_count;
+ dbg[dbg_i].rx_pos = ao_usb_rx_pos;
+ dbg[dbg_i].out_avail = ao_usb_out_avail;
+ dbg[dbg_i].out_epr = stm_usb.epr[AO_USB_OUT_EPR];
+#endif
+ if (++dbg_i == NUM_USB_DBG)
+ dbg_i = 0;
+}
+#endif
projects / fw / altos / blobdiff