#include "ao_usb.h"
#include "ao_product.h"
-#define USB_DEBUG 1
-#define USB_DEBUG_DATA 1
-#define USB_ECHO 1
+#define USB_DEBUG 0
+#define USB_DEBUG_DATA 0
+#define USB_ECHO 0
#if USB_DEBUG
#define debug(format, args...) printf(format, ## args);
* Objects allocated in special USB memory
*/
-/* Buffer description tables */
-static union lpc_usb_bdt *ao_usb_bdt;
/* USB address of end of allocated storage */
-static uint16_t ao_usb_sram_addr;
+static uint8_t *ao_usb_sram;
/* Pointer to ep0 tx/rx buffers in USB memory */
-static uint32_t *ao_usb_ep0_tx_buffer;
-static uint32_t *ao_usb_ep0_rx_buffer;
+static uint8_t *ao_usb_ep0_tx_buffer;
+static uint8_t *ao_usb_ep0_setup_buffer;
+static uint8_t *ao_usb_ep0_rx_buffer;
/* Pointer to bulk data tx/rx buffers in USB memory */
-static uint32_t *ao_usb_in_tx_buffer;
-static uint32_t *ao_usb_out_rx_buffer;
+static uint8_t *ao_usb_in_tx_buffer;
+static uint8_t *ao_usb_out_rx_buffer;
-/* System ram shadow of USB buffer; writing individual bytes is
- * too much of a pain (sigh) */
+/* Our data buffers */
static uint8_t ao_usb_tx_buffer[AO_USB_IN_SIZE];
static uint8_t ao_usb_tx_count;
static uint8_t ao_usb_rx_buffer[AO_USB_OUT_SIZE];
static uint8_t ao_usb_rx_count, ao_usb_rx_pos;
-/*
- * End point register indices
- */
-
-#define AO_USB_CONTROL_EPR 0
-#define AO_USB_INT_EPR 1
-#define AO_USB_OUT_EPR 2
-#define AO_USB_IN_EPR 3
+static struct lpc_usb_endpoint lpc_usb_endpoint __attribute((aligned(256)));
/* Marks when we don't need to send an IN packet.
* This happens only when the last IN packet is not full,
return (current_value ^ desired_value) & mask;
}
-static inline uint32_t *ao_usb_packet_buffer_addr(uint16_t sram_addr)
-{
- return (uint32_t *) (lpc_usb_sram + 2 * sram_addr);
-}
-
-static inline uint32_t ao_usb_epr_stat_rx(uint32_t epr) {
- return (epr >> USB_USB_EPR_STAT_RX) & USB_USB_EPR_STAT_RX_MASK;
-}
-
-static inline uint32_t ao_usb_epr_stat_tx(uint32_t epr) {
- return (epr >> USB_USB_EPR_STAT_TX) & USB_USB_EPR_STAT_TX_MASK;
-}
-
-static inline uint32_t ao_usb_epr_ctr_rx(uint32_t epr) {
- return (epr >> USB_USB_EPR_CTR_RX) & 1;
-}
-
-static inline uint32_t ao_usb_epr_ctr_tx(uint32_t epr) {
- return (epr >> USB_USB_EPR_CTR_TX) & 1;
-}
-
-static inline uint32_t ao_usb_epr_setup(uint32_t epr) {
- return (epr >> USB_USB_EPR_SETUP) & 1;
-}
-
-static inline uint32_t ao_usb_epr_dtog_rx(uint32_t epr) {
- return (epr >> USB_USB_EPR_DTOG_RX) & 1;
-}
-
-static inline uint32_t ao_usb_epr_dtog_tx(uint32_t epr) {
- return (epr >> USB_USB_EPR_DTOG_TX) & 1;
-}
-
/*
* Set current device address and mark the
* interface as active
ao_usb_set_address(uint8_t address)
{
debug("ao_usb_set_address %02x\n", address);
- lpc_usb.daddr = (1 << USB_USB_DADDR_EF) | address;
+ lpc_usb.devcmdstat = ((address << LPC_USB_DEVCMDSTAT_DEV_ADDR) |
+ (1 << LPC_USB_DEVCMDSTAT_DEV_EN) |
+ (0 << LPC_USB_DEVCMDSTAT_SETUP) |
+ (0 << LPC_USB_DEVCMDSTAT_PLL_ON) |
+ (0 << LPC_USB_DEVCMDSTAT_LPM_SUP) |
+ (0 << LPC_USB_DEVCMDSTAT_INTONNAK_AO) |
+ (0 << LPC_USB_DEVCMDSTAT_INTONNAK_AI) |
+ (0 << LPC_USB_DEVCMDSTAT_INTONNAK_CO) |
+ (0 << LPC_USB_DEVCMDSTAT_INTONNAK_CI) |
+ (1 << LPC_USB_DEVCMDSTAT_DCON) |
+ (0 << LPC_USB_DEVCMDSTAT_DSUS) |
+ (0 << LPC_USB_DEVCMDSTAT_DCON_C) |
+ (0 << LPC_USB_DEVCMDSTAT_DSUS_C) |
+ (0 << LPC_USB_DEVCMDSTAT_DRES_C) |
+ (0 << LPC_USB_DEVCMDSTAT_VBUSDEBOUNCED));
ao_usb_address_pending = 0;
}
-/*
- * Write these values to preserve register contents under HW changes
- */
-
-#define USB_USB_EPR_INVARIANT ((1 << USB_USB_EPR_CTR_RX) | \
- (USB_USB_EPR_DTOG_RX_WRITE_INVARIANT << USB_USB_EPR_DTOG_RX) | \
- (USB_USB_EPR_STAT_RX_WRITE_INVARIANT << USB_USB_EPR_STAT_RX) | \
- (1 << USB_USB_EPR_CTR_TX) | \
- (USB_USB_EPR_DTOG_TX_WRITE_INVARIANT << USB_USB_EPR_DTOG_TX) | \
- (USB_USB_EPR_STAT_TX_WRITE_INVARIANT << USB_USB_EPR_STAT_TX))
-
-#define USB_USB_EPR_INVARIANT_MASK ((1 << USB_USB_EPR_CTR_RX) | \
- (USB_USB_EPR_DTOG_RX_MASK << USB_USB_EPR_DTOG_RX) | \
- (USB_USB_EPR_STAT_RX_MASK << USB_USB_EPR_STAT_RX) | \
- (1 << USB_USB_EPR_CTR_TX) | \
- (USB_USB_EPR_DTOG_TX_MASK << USB_USB_EPR_DTOG_TX) | \
- (USB_USB_EPR_STAT_TX_MASK << USB_USB_EPR_STAT_TX))
-
-/*
- * These bits are purely under sw control, so preserve them in the
- * register by re-writing what was read
- */
-#define USB_USB_EPR_PRESERVE_MASK ((USB_USB_EPR_EP_TYPE_MASK << USB_USB_EPR_EP_TYPE) | \
- (1 << USB_USB_EPR_EP_KIND) | \
- (USB_USB_EPR_EA_MASK << USB_USB_EPR_EA))
-
#define TX_DBG 0
#define RX_DBG 0
#endif
/*
- * Set the state of the specified endpoint register to a new
- * value. This is tricky because the bits toggle where the new
- * value is one, and we need to write invariant values in other
- * spots of the register. This hardware is strange...
+ * Set just endpoint 0, for use during startup
*/
-static void
-_ao_usb_set_stat_tx(int ep, uint32_t stat_tx)
+
+static uint8_t *
+ao_usb_alloc_sram(uint16_t size)
{
- uint32_t epr_write, epr_old;
-
- _tx_dbg1("set_stat_tx top", stat_tx);
- epr_old = epr_write = lpc_usb.epr[ep];
- epr_write &= USB_USB_EPR_PRESERVE_MASK;
- epr_write |= USB_USB_EPR_INVARIANT;
- epr_write |= set_toggle(epr_old,
- USB_USB_EPR_STAT_TX_MASK << USB_USB_EPR_STAT_TX,
- stat_tx << USB_USB_EPR_STAT_TX);
- lpc_usb.epr[ep] = epr_write;
- _tx_dbg1("set_stat_tx bottom", epr_write);
+ uint8_t *addr = ao_usb_sram;
+
+ ao_usb_sram += (size + 63) & ~63;
+ return addr;
}
-static void
-ao_usb_set_stat_tx(int ep, uint32_t stat_tx)
+static uint16_t
+ao_usb_sram_offset(uint8_t *addr)
{
- ao_arch_block_interrupts();
- _ao_usb_set_stat_tx(ep, stat_tx);
- ao_arch_release_interrupts();
+ return (uint16_t) ((intptr_t) addr >> 6);
}
static void
-_ao_usb_set_stat_rx(int ep, uint32_t stat_rx) {
- uint32_t epr_write, epr_old;
-
- epr_write = epr_old = lpc_usb.epr[ep];
- epr_write &= USB_USB_EPR_PRESERVE_MASK;
- epr_write |= USB_USB_EPR_INVARIANT;
- epr_write |= set_toggle(epr_old,
- USB_USB_EPR_STAT_RX_MASK << USB_USB_EPR_STAT_RX,
- stat_rx << USB_USB_EPR_STAT_RX);
- lpc_usb.epr[ep] = epr_write;
+ao_usb_set_ep(vuint32_t *ep, uint8_t *addr, uint16_t nbytes)
+{
+ *ep = ((ao_usb_sram_offset(addr) << LPC_USB_EP_OFFSET) |
+ (nbytes << LPC_USB_EP_NBYTES) |
+ (0 << LPC_USB_EP_ENDPOINT_ISO) |
+ (0 << LPC_USB_EP_RATE_FEEDBACK) |
+ (0 << LPC_USB_EP_TOGGLE_RESET) |
+ (0 << LPC_USB_EP_STALL) |
+ (0 << LPC_USB_EP_DISABLED) |
+ (1 << LPC_USB_EP_ACTIVE));
}
-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();
+static inline uint16_t
+ao_usb_ep_count(vuint32_t *ep)
+{
+ return (*ep >> LPC_USB_EP_NBYTES) & LPC_USB_EP_NBYTES_MASK;
}
-/*
- * Set just endpoint 0, for use during startup
- */
-
-static void
-ao_usb_init_ep(uint8_t ep, uint32_t addr, uint32_t type, uint32_t stat_rx, uint32_t stat_tx)
+static inline uint8_t
+ao_usb_ep_stall(vuint32_t *ep)
{
- uint32_t epr;
- ao_arch_block_interrupts();
- epr = lpc_usb.epr[ep];
- epr = ((0 << USB_USB_EPR_CTR_RX) |
- (epr & (1 << USB_USB_EPR_DTOG_RX)) |
- set_toggle(epr,
- (USB_USB_EPR_STAT_RX_MASK << USB_USB_EPR_STAT_RX),
- (stat_rx << USB_USB_EPR_STAT_RX)) |
- (type << USB_USB_EPR_EP_TYPE) |
- (0 << USB_USB_EPR_EP_KIND) |
- (0 << USB_USB_EPR_CTR_TX) |
- (epr & (1 << USB_USB_EPR_DTOG_TX)) |
- set_toggle(epr,
- (USB_USB_EPR_STAT_TX_MASK << USB_USB_EPR_STAT_TX),
- (stat_tx << USB_USB_EPR_STAT_TX)) |
- (addr << USB_USB_EPR_EA));
- lpc_usb.epr[ep] = epr;
- ao_arch_release_interrupts();
- debug ("writing epr[%d] 0x%08x wrote 0x%08x\n",
- ep, epr, lpc_usb.epr[ep]);
+ return (*ep >> LPC_USB_EP_STALL) & 1;
}
-static void
-ao_usb_set_ep0(void)
+static inline vuint32_t *
+ao_usb_ep0_out(void)
{
- uint32_t epr;
- int e;
-
- ao_usb_sram_addr = 0;
-
- /* buffer table is at the start of USB memory */
- lpc_usb.btable = 0;
- ao_usb_bdt = (void *) lpc_usb_sram;
-
- ao_usb_sram_addr += 8 * USB_USB_BDT_SIZE;
-
- /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */
-
- ao_usb_bdt[0].single.addr_tx = ao_usb_sram_addr;
- ao_usb_bdt[0].single.count_tx = 0;
- ao_usb_ep0_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
-
- ao_usb_bdt[0].single.addr_rx = ao_usb_sram_addr;
- ao_usb_bdt[0].single.count_rx = ((1 << USB_USB_BDT_COUNT_RX_BL_SIZE) |
- (((AO_USB_CONTROL_SIZE / 32) - 1) << USB_USB_BDT_COUNT_RX_NUM_BLOCK));
- ao_usb_ep0_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
+ return &lpc_usb_endpoint.ep0_out;
+}
- ao_usb_init_ep(AO_USB_CONTROL_EPR, AO_USB_CONTROL_EP,
- USB_USB_EPR_EP_TYPE_CONTROL,
- USB_USB_EPR_STAT_RX_VALID,
- USB_USB_EPR_STAT_TX_NAK);
+static inline vuint32_t *
+ao_usb_ep0_in(void)
+{
+ return &lpc_usb_endpoint.ep0_in;
+}
- /* Clear all of the other endpoints */
- for (e = 1; e < 8; e++) {
- ao_usb_init_ep(e, 0,
- USB_USB_EPR_EP_TYPE_CONTROL,
- USB_USB_EPR_STAT_RX_DISABLED,
- USB_USB_EPR_STAT_TX_DISABLED);
- }
+static inline vuint32_t *
+ao_usb_epn_out(uint8_t n)
+{
+ return &lpc_usb_endpoint.epn[n-1].out[0];
+}
- ao_usb_set_address(0);
+static inline vuint32_t *
+ao_usb_epn_in(uint8_t n)
+{
+ return &lpc_usb_endpoint.epn[n-1].in[0];
}
static void
-ao_usb_set_configuration(void)
+ao_usb_set_epn_in(uint8_t n, uint8_t *addr, uint16_t nbytes)
{
- uint32_t epr;
-
- debug ("ao_usb_set_configuration\n");
-
- /* Set up the INT end point */
- ao_usb_bdt[AO_USB_INT_EPR].single.addr_tx = ao_usb_sram_addr;
- ao_usb_bdt[AO_USB_INT_EPR].single.count_tx = 0;
- ao_usb_in_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_INT_SIZE;
-
- ao_usb_init_ep(AO_USB_INT_EPR,
- AO_USB_INT_EP,
- USB_USB_EPR_EP_TYPE_INTERRUPT,
- USB_USB_EPR_STAT_RX_DISABLED,
- USB_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 << USB_USB_BDT_COUNT_RX_BL_SIZE) |
- (((AO_USB_OUT_SIZE / 32) - 1) << USB_USB_BDT_COUNT_RX_NUM_BLOCK));
- ao_usb_out_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_OUT_SIZE;
-
- ao_usb_init_ep(AO_USB_OUT_EPR,
- AO_USB_OUT_EP,
- USB_USB_EPR_EP_TYPE_BULK,
- USB_USB_EPR_STAT_RX_VALID,
- USB_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;
- ao_usb_in_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_IN_SIZE;
-
- ao_usb_init_ep(AO_USB_IN_EPR,
- AO_USB_IN_EP,
- USB_USB_EPR_EP_TYPE_BULK,
- USB_USB_EPR_STAT_RX_DISABLED,
- USB_USB_EPR_STAT_TX_NAK);
-
- ao_usb_running = 1;
+ ao_usb_set_ep(ao_usb_epn_in(n), addr, nbytes);
}
-static uint16_t control_count;
-static uint16_t int_count;
-static uint16_t in_count;
-static uint16_t out_count;
-static uint16_t reset_count;
-
-void
-lpc_usb_lp_isr(void)
+static void
+ao_usb_set_epn_out(uint8_t n, uint8_t *addr, uint16_t nbytes)
{
- uint32_t istr = lpc_usb.istr;
-
- if (istr & (1 << USB_USB_ISTR_CTR)) {
- uint8_t ep = istr & USB_USB_ISTR_EP_ID_MASK;
- uint32_t epr, epr_write;
-
- /* Preserve the SW write bits, don't mess with most HW writable bits,
- * clear the CTR_RX and CTR_TX bits
- */
- epr = lpc_usb.epr[ep];
- epr_write = epr;
- epr_write &= USB_USB_EPR_PRESERVE_MASK;
- epr_write |= USB_USB_EPR_INVARIANT;
- epr_write &= ~(1 << USB_USB_EPR_CTR_RX);
- epr_write &= ~(1 << USB_USB_EPR_CTR_TX);
- lpc_usb.epr[ep] = epr_write;
-
- switch (ep) {
- case 0:
- ++control_count;
- if (ao_usb_epr_ctr_rx(epr)) {
- if (ao_usb_epr_setup(epr))
- ao_usb_ep0_receive |= AO_USB_EP0_GOT_SETUP;
- else
- ao_usb_ep0_receive |= AO_USB_EP0_GOT_RX_DATA;
- }
- if (ao_usb_epr_ctr_tx(epr))
- ao_usb_ep0_receive |= AO_USB_EP0_GOT_TX_ACK;
- ao_wakeup(&ao_usb_ep0_receive);
- break;
- 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);
- }
- break;
- case AO_USB_INT_EPR:
- ++int_count;
- if (ao_usb_epr_ctr_tx(epr))
- _ao_usb_set_stat_tx(AO_USB_INT_EPR, USB_USB_EPR_STAT_TX_NAK);
- break;
- }
- return;
- }
-
- if (istr & (1 << USB_USB_ISTR_RESET)) {
- ++reset_count;
- lpc_usb.istr &= ~(1 << USB_USB_ISTR_RESET);
- ao_usb_ep0_receive |= AO_USB_EP0_GOT_RESET;
- ao_wakeup(&ao_usb_ep0_receive);
- }
+ ao_usb_set_ep(ao_usb_epn_out(n), addr, nbytes);
}
-void
-lpc_usb_fs_wkup(void)
+static inline uint16_t
+ao_usb_epn_out_count(uint8_t n)
{
- /* USB wakeup, just clear the bit for now */
- lpc_usb.istr &= ~(1 << USB_USB_ISTR_WKUP);
+ return ao_usb_ep_count(ao_usb_epn_out(n));
}
-/* The USB memory holds 16 bit values on 32 bit boundaries
- * and must be accessed only in 32 bit units. Sigh.
- */
+static inline uint16_t
+ao_usb_epn_in_count(uint8_t n)
+{
+ return ao_usb_ep_count(ao_usb_epn_in(n));
+}
-static inline void
-ao_usb_write_byte(uint8_t byte, uint32_t *base, uint16_t offset)
+static uint8_t *
+ao_usb_enable_ep(vuint32_t *ep, uint16_t nbytes, uint16_t set_nbytes)
{
- base += offset >> 1;
- if (offset & 1) {
- *base = (*base & 0xff) | ((uint32_t) byte << 8);
- } else {
- *base = (*base & 0xff00) | byte;
- }
+ uint8_t *addr = ao_usb_alloc_sram(nbytes);
+
+ ao_usb_set_ep(ep, addr, set_nbytes);
+ return addr;
}
-static inline void
-ao_usb_write_short(uint16_t data, uint32_t *base, uint16_t offset)
+static void
+ao_usb_disable_ep(vuint32_t *ep)
{
- base[offset>>1] = data;
+ *ep = ((0 << LPC_USB_EP_OFFSET) |
+ (0 << LPC_USB_EP_NBYTES) |
+ (0 << LPC_USB_EP_ENDPOINT_ISO) |
+ (0 << LPC_USB_EP_RATE_FEEDBACK) |
+ (0 << LPC_USB_EP_TOGGLE_RESET) |
+ (0 << LPC_USB_EP_STALL) |
+ (1 << LPC_USB_EP_DISABLED) |
+ (0 << LPC_USB_EP_ACTIVE));
}
static void
-ao_usb_write(const uint8_t *src, uint32_t *base, uint16_t offset, uint16_t bytes)
+ao_usb_enable_epn(uint8_t n, uint16_t out_bytes, uint8_t **out_addr, uint16_t in_bytes, uint8_t **in_addr)
{
- if (!bytes)
- return;
- if (offset & 1) {
- debug_data (" %02x", src[0]);
- ao_usb_write_byte(*src++, base, offset++);
- bytes--;
- }
- while (bytes >= 2) {
- debug_data (" %02x %02x", src[0], src[1]);
- ao_usb_write_short((src[1] << 8) | src[0], base, offset);
- offset += 2;
- src += 2;
- bytes -= 2;
- }
- if (bytes) {
- debug_data (" %02x", src[0]);
- ao_usb_write_byte(*src, base, offset);
- }
+ uint8_t *addr;
+
+ addr = ao_usb_enable_ep(ao_usb_epn_out(n), out_bytes, out_bytes);
+ if (out_addr)
+ *out_addr = addr;
+ ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].out[1]);
+
+ addr = ao_usb_enable_ep(ao_usb_epn_in(n), in_bytes, 0);
+ if (in_addr)
+ *in_addr = addr;
+ ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].in[1]);
}
-static inline uint8_t
-ao_usb_read_byte(uint32_t *base, uint16_t offset)
+static void
+ao_usb_disable_epn(uint8_t n)
{
- base += offset >> 1;
- if (offset & 1)
- return (*base >> 8) & 0xff;
- else
- return *base & 0xff;
+ ao_usb_disable_ep(ao_usb_epn_out(n));
+ ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].out[1]);
+ ao_usb_disable_ep(ao_usb_epn_in(n));
+ ao_usb_disable_ep(&lpc_usb_endpoint.epn[n-1].in[1]);
}
-static inline uint16_t
-ao_usb_read_short(uint32_t *base, uint16_t offset)
+static void
+ao_usb_set_ep0(void)
{
- return base[offset>>1];
+ int e;
+
+ /* Everything is single buffered for now */
+ lpc_usb.epbufcfg = 0;
+ lpc_usb.epinuse = 0;
+ lpc_usb.epskip = 0xffffffff;
+
+ ao_usb_set_address(0);
+ lpc_usb.intstat = 0xc00003ff;
+
+ ao_usb_configuration = 0;
+
+ ao_usb_sram = lpc_usb_sram;
+
+ lpc_usb.epliststart = (uint32_t) (intptr_t) &lpc_usb_endpoint;
+ lpc_usb.databufstart = ((uint32_t) (intptr_t) ao_usb_sram) & 0xffc00000;
+
+ /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */
+
+ ao_usb_ep0_rx_buffer = ao_usb_enable_ep(ao_usb_ep0_out(), AO_USB_CONTROL_SIZE, AO_USB_CONTROL_SIZE);
+ ao_usb_ep0_setup_buffer = ao_usb_alloc_sram(AO_USB_CONTROL_SIZE);
+ lpc_usb_endpoint.setup = ao_usb_sram_offset(ao_usb_ep0_setup_buffer);
+ ao_usb_ep0_tx_buffer = ao_usb_enable_ep(ao_usb_ep0_in(), AO_USB_CONTROL_SIZE, 0);
+
+ /* Clear all of the other endpoints */
+ for (e = 1; e <= 4; e++)
+ ao_usb_disable_epn(e);
+
}
static void
-ao_usb_read(uint8_t *dst, uint32_t *base, uint16_t offset, uint16_t bytes)
+ao_usb_set_configuration(void)
{
- if (!bytes)
- return;
- if (offset & 1) {
- *dst++ = ao_usb_read_byte(base, offset++);
- debug_data (" %02x", dst[-1]);
- bytes--;
- }
- while (bytes >= 2) {
- uint16_t s = ao_usb_read_short(base, offset);
- dst[0] = s;
- dst[1] = s >> 8;
- debug_data (" %02x %02x", dst[0], dst[1]);
- offset += 2;
- dst += 2;
- bytes -= 2;
- }
- if (bytes) {
- *dst = ao_usb_read_byte(base, offset);
- debug_data (" %02x", dst[0]);
- }
+ debug ("ao_usb_set_configuration\n");
+
+ /* Set up the INT end point */
+ ao_usb_enable_epn(AO_USB_INT_EP, 0, NULL, 0, NULL);
+
+ /* Set up the OUT end point */
+ ao_usb_enable_epn(AO_USB_OUT_EP, AO_USB_OUT_SIZE, &ao_usb_out_rx_buffer, 0, NULL);
+
+ /* Set up the IN end point */
+ ao_usb_enable_epn(AO_USB_IN_EP, 0, NULL, AO_USB_IN_SIZE, &ao_usb_in_tx_buffer);
+
+ ao_usb_running = 1;
}
/* Send an IN data packet */
{
uint8_t this_len;
- /* Check to see if the endpoint is still busy */
- if (ao_usb_epr_stat_tx(lpc_usb.epr[0]) == USB_USB_EPR_STAT_TX_VALID) {
- debug("EP0 not accepting IN data\n");
- return;
- }
-
this_len = ao_usb_ep0_in_len;
if (this_len > AO_USB_CONTROL_SIZE)
this_len = AO_USB_CONTROL_SIZE;
ao_usb_ep0_in_len -= this_len;
debug_data ("Flush EP0 len %d:", this_len);
- ao_usb_write(ao_usb_ep0_in_data, ao_usb_ep0_tx_buffer, 0, this_len);
+ memcpy(ao_usb_ep0_tx_buffer, ao_usb_ep0_in_data, this_len);
debug_data ("\n");
ao_usb_ep0_in_data += this_len;
/* Mark the endpoint as TX valid to send the packet */
- ao_usb_bdt[AO_USB_CONTROL_EPR].single.count_tx = this_len;
- ao_usb_set_stat_tx(AO_USB_CONTROL_EPR, USB_USB_EPR_STAT_TX_VALID);
- debug ("queue tx. epr 0 now %08x\n", lpc_usb.epr[AO_USB_CONTROL_EPR]);
+ ao_usb_set_ep(ao_usb_ep0_in(), ao_usb_ep0_tx_buffer, this_len);
+ debug ("queue tx. 0 now %08x\n", *ao_usb_ep0_in());
}
/* Read data from the ep0 OUT fifo */
static void
ao_usb_ep0_fill(void)
{
- uint16_t len = ao_usb_bdt[0].single.count_rx & USB_USB_BDT_COUNT_RX_COUNT_RX_MASK;
+ uint16_t len;
+ uint8_t *rx_buffer;
+
+ /* Pull all of the data out of the packet */
+ if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_SETUP)) {
+ rx_buffer = ao_usb_ep0_setup_buffer;
+ len = 8;
+ } else {
+ rx_buffer = ao_usb_ep0_rx_buffer;
+ len = AO_USB_CONTROL_SIZE - ao_usb_ep_count(ao_usb_ep0_out());
+ }
if (len > ao_usb_ep0_out_len)
len = ao_usb_ep0_out_len;
ao_usb_ep0_out_len -= len;
- /* Pull all of the data out of the packet */
debug_data ("Fill EP0 len %d:", len);
- ao_usb_read(ao_usb_ep0_out_data, ao_usb_ep0_rx_buffer, 0, len);
+ memcpy(ao_usb_ep0_out_data, rx_buffer, len);
debug_data ("\n");
ao_usb_ep0_out_data += len;
/* ACK the packet */
- ao_usb_set_stat_rx(0, USB_USB_EPR_STAT_RX_VALID);
+ ao_usb_set_ep(ao_usb_ep0_out(), ao_usb_ep0_rx_buffer, AO_USB_CONTROL_SIZE);
+ lpc_usb.devcmdstat |= (1 << LPC_USB_DEVCMDSTAT_SETUP);
}
static void
ao_usb_ep0_in_start(ao_usb_setup.length);
}
-/* End point 0 receives all of the control messages. */
static void
-ao_usb_ep0(void)
+ao_usb_ep0_handle(uint8_t receive)
{
- uint8_t intx, udint;
+ ao_usb_ep0_receive = 0;
- debug ("usb task started\n");
- ao_usb_ep0_state = AO_USB_EP0_IDLE;
- for (;;) {
- uint8_t receive;
- ao_arch_critical(
- while (!(receive = ao_usb_ep0_receive))
- 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();
- continue;
- }
- if (receive & AO_USB_EP0_GOT_SETUP) {
- debug ("\tsetup\n");
- ao_usb_ep0_setup();
- }
- if (receive & AO_USB_EP0_GOT_RX_DATA) {
- debug ("\tgot rx data\n");
- if (ao_usb_ep0_state == AO_USB_EP0_DATA_OUT) {
- ao_usb_ep0_fill();
- if (ao_usb_ep0_out_len == 0) {
- ao_usb_ep0_state = AO_USB_EP0_DATA_IN;
- ao_usb_ep0_in_start(0);
- }
+ if (receive & AO_USB_EP0_GOT_RESET) {
+ debug ("\treset\n");
+ ao_usb_set_ep0();
+ return;
+ }
+ if (receive & AO_USB_EP0_GOT_SETUP) {
+ debug ("\tsetup\n");
+ ao_usb_ep0_setup();
+ }
+ if (receive & AO_USB_EP0_GOT_RX_DATA) {
+ debug ("\tgot rx data\n");
+ if (ao_usb_ep0_state == AO_USB_EP0_DATA_OUT) {
+ ao_usb_ep0_fill();
+ if (ao_usb_ep0_out_len == 0) {
+ ao_usb_ep0_state = AO_USB_EP0_DATA_IN;
+ ao_usb_ep0_in_start(0);
}
}
- if (receive & AO_USB_EP0_GOT_TX_ACK) {
- debug ("\tgot tx ack\n");
-
- /* Wait until the IN packet is received from addr 0
- * before assigning our local address
- */
- if (ao_usb_address_pending)
- ao_usb_set_address(ao_usb_address);
- if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN)
- ao_usb_ep0_flush();
+ }
+ if (receive & AO_USB_EP0_GOT_TX_ACK) {
+ debug ("\tgot tx ack\n");
+
+ /* Wait until the IN packet is received from addr 0
+ * before assigning our local address
+ */
+ if (ao_usb_address_pending)
+ ao_usb_set_address(ao_usb_address);
+ if (ao_usb_ep0_state == AO_USB_EP0_DATA_IN)
+ ao_usb_ep0_flush();
+ }
+}
+
+static uint16_t control_count;
+static uint16_t int_count;
+static uint16_t in_count;
+static uint16_t out_count;
+static uint16_t reset_count;
+
+void
+lpc_usb_irq_isr(void)
+{
+ uint32_t intstat = lpc_usb.intstat & lpc_usb.inten;
+
+ lpc_usb.intstat = intstat;
+ /* Handle EP0 OUT packets */
+ if (intstat & (1 << LPC_USB_INT_EPOUT(0))) {
+ if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_SETUP))
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_SETUP;
+ else
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_RX_DATA;
+
+ ao_usb_ep0_handle(ao_usb_ep0_receive);
+ }
+
+ /* Handle EP0 IN packets */
+ if (intstat & (1 << LPC_USB_INT_EPIN(0))) {
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_TX_ACK;
+
+ ao_usb_ep0_handle(ao_usb_ep0_receive);
+ }
+
+
+ /* Handle OUT packets */
+ if (intstat & (1 << LPC_USB_INT_EPOUT(AO_USB_OUT_EP))) {
+ ++out_count;
+ _rx_dbg1("RX ISR", *ao_usb_epn_out(AO_USB_OUT_EP));
+ ao_usb_out_avail = 1;
+ _rx_dbg0("out avail set");
+ ao_wakeup(&ao_stdin_ready);
+ _rx_dbg0("stdin awoken");
+ }
+
+ /* Handle IN packets */
+ if (intstat & (1 << LPC_USB_INT_EPIN(AO_USB_IN_EP))) {
+ ++in_count;
+ _tx_dbg1("TX ISR", *ao_usb_epn_in(AO_USB_IN_EP));
+ ao_usb_in_pending = 0;
+ ao_wakeup(&ao_usb_in_pending);
+ }
+
+ /* NAK all INT EP IN packets */
+ if (intstat & (1 << LPC_USB_INT_EPIN(AO_USB_INT_EP))) {
+ ;
+ }
+
+ /* Check for reset */
+ if (intstat & (1 << LPC_USB_INT_DEV)) {
+ if (lpc_usb.devcmdstat & (1 << LPC_USB_DEVCMDSTAT_DRES_C))
+ {
+ lpc_usb.devcmdstat |= (1 << LPC_USB_DEVCMDSTAT_DRES_C);
+ ao_usb_ep0_receive |= AO_USB_EP0_GOT_RESET;
+ ao_usb_ep0_handle(ao_usb_ep0_receive);
}
}
}
+
+
/* Queue the current IN buffer for transmission */
static void
_ao_usb_in_send(void)
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;
+ memcpy(ao_usb_in_tx_buffer, ao_usb_tx_buffer, ao_usb_tx_count);
+ ao_usb_set_ep(ao_usb_epn_in(AO_USB_IN_EP), ao_usb_in_tx_buffer, ao_usb_tx_count);
ao_usb_tx_count = 0;
- _ao_usb_set_stat_tx(AO_USB_IN_EPR, USB_USB_EPR_STAT_TX_VALID);
_tx_dbg0("in_send end");
}
_rx_dbg0("out_recv top");
ao_usb_out_avail = 0;
- ao_usb_rx_count = ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx & USB_USB_BDT_COUNT_RX_COUNT_RX_MASK;
+ ao_usb_rx_count = AO_USB_OUT_SIZE - ao_usb_epn_out_count(AO_USB_OUT_EP);
_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);
+ memcpy(ao_usb_rx_buffer, ao_usb_out_rx_buffer, ao_usb_rx_count);
debug_data("\n");
ao_usb_rx_pos = 0;
/* ACK the packet */
- _ao_usb_set_stat_rx(AO_USB_OUT_EPR, USB_USB_EPR_STAT_RX_VALID);
+ ao_usb_set_epn_out(AO_USB_OUT_EP, ao_usb_out_rx_buffer, AO_USB_OUT_SIZE);
}
int
ao_usb_disable(void)
{
ao_arch_block_interrupts();
- lpc_usb.cntr = (1 << USB_USB_CNTR_FRES);
- lpc_usb.istr = 0;
- /* Disable USB pull-up */
- lpc_syscfg.pmc &= ~(1 << USB_SYSCFG_PMC_USB_PU);
+ /* Disable interrupts */
+ lpc_usb.inten = 0;
+
+ lpc_nvic_clear_enable(LPC_ISR_USB_IRQ_POS);
- /* Switch off the device */
- lpc_usb.cntr = (1 << USB_USB_CNTR_PDWN) | (1 << USB_USB_CNTR_FRES);
+ /* Disable the device */
+ lpc_usb.devcmdstat = 0;
+
+ /* Turn off USB clock */
+ lpc_scb.usbclkdiv = 0;
+
+ /* Disable USB PHY */
+ lpc_scb.pdruncfg |= (1 << LPC_SCB_PDRUNCFG_USBPAD_PD);
+
+ /* Disable USB registers and RAM */
+ lpc_scb.sysahbclkctrl &= ~((1 << LPC_SCB_SYSAHBCLKCTRL_USB) |
+ (1 << LPC_SCB_SYSAHBCLKCTRL_USBRAM));
- /* Disable the interface */
- lpc_rcc.apb1enr &+ ~(1 << USB_RCC_APB1ENR_USBEN);
ao_arch_release_interrupts();
}
{
int t;
+ /* Enable USB pins */
+#if HAS_USB_CONNECT
+ lpc_ioconf.pio0_6 = ((LPC_IOCONF_FUNC_USB_CONNECT << LPC_IOCONF_FUNC) |
+ (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
+ (0 << LPC_IOCONF_HYS) |
+ (0 << LPC_IOCONF_INV) |
+ (0 << LPC_IOCONF_OD) |
+ 0x80);
+#endif
+#if HAS_USB_VBUS
+ lpc_ioconf.pio0_3 = ((LPC_IOCONF_FUNC_USB_VBUS << LPC_IOCONF_FUNC) |
+ (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
+ (0 << LPC_IOCONF_HYS) |
+ (0 << LPC_IOCONF_INV) |
+ (0 << LPC_IOCONF_OD) |
+ 0x80);
+#endif
/* Enable USB registers and RAM */
lpc_scb.sysahbclkctrl |= ((1 << LPC_SCB_SYSAHBCLKCTRL_USB) |
(1 << LPC_SCB_SYSAHBCLKCTRL_USBRAM));
/* Enable USB PHY */
lpc_scb.pdruncfg &= ~(1 << LPC_SCB_PDRUNCFG_USBPAD_PD);
+ /* Turn on USB PLL */
+ lpc_scb.pdruncfg &= ~(1 << LPC_SCB_PDRUNCFG_USBPLL_PD);
+
+ lpc_scb.usbpllclksel = (LPC_SCB_SYSPLLCLKSEL_SEL_SYSOSC << LPC_SCB_SYSPLLCLKSEL_SEL);
+ lpc_scb.usbpllclkuen = (1 << LPC_SCB_USBPLLCLKUEN_ENA);
+ lpc_scb.usbpllclkuen = (0 << LPC_SCB_USBPLLCLKUEN_ENA);
+ lpc_scb.usbpllclkuen = (1 << LPC_SCB_USBPLLCLKUEN_ENA);
+ while (!(lpc_scb.usbpllclkuen & (1 << LPC_SCB_USBPLLCLKUEN_ENA)))
+ ;
+ lpc_scb.usbpllctrl = 0x23;
+ while (!(lpc_scb.usbpllstat & 1))
+ ;
+
+ lpc_scb.usbclksel = 0;
+
/* Turn on USB clock, use 48MHz clock unchanged */
lpc_scb.usbclkdiv = 1;
/* Configure interrupts */
ao_arch_block_interrupts();
- /* Enable interrupts */
- lpc_usb.
- /* Route interrupts */
-
- lpc_nvic_set_priority(USB_ISR_USB_LP_POS, 3);
- lpc_nvic_set_enable(USB_ISR_USB_LP_POS);
+ /* Route all interrupts to the main isr */
+ lpc_usb.introuting = 0;
- ao_usb_configuration = 0;
-
- lpc_usb.cntr = (1 << USB_USB_CNTR_FRES);
+ /* Configure NVIC */
- /* Clear the power down bit */
- lpc_usb.cntr = 0;
+ lpc_nvic_set_enable(LPC_ISR_USB_IRQ_POS);
+ lpc_nvic_set_priority(LPC_ISR_USB_IRQ_POS, 0);
/* Clear any spurious interrupts */
- lpc_usb.istr = 0;
+ lpc_usb.intstat = 0xffffffff;
debug ("ao_usb_enable\n");
/* Enable interrupts */
- lpc_usb.cntr = ((1 << USB_USB_CNTR_CTRM) |
- (0 << USB_USB_CNTR_PMAOVRM) |
- (0 << USB_USB_CNTR_ERRM) |
- (0 << USB_USB_CNTR_WKUPM) |
- (0 << USB_USB_CNTR_SUSPM) |
- (1 << USB_USB_CNTR_RESETM) |
- (0 << USB_USB_CNTR_SOFM) |
- (0 << USB_USB_CNTR_ESOFM) |
- (0 << USB_USB_CNTR_RESUME) |
- (0 << USB_USB_CNTR_FSUSP) |
- (0 << USB_USB_CNTR_LP_MODE) |
- (0 << USB_USB_CNTR_PDWN) |
- (0 << USB_USB_CNTR_FRES));
+ lpc_usb.inten = ((1 << LPC_USB_INT_EPOUT(0)) |
+ (1 << LPC_USB_INT_EPIN(0)) |
+ (1 << LPC_USB_INT_EPIN(AO_USB_INT_EP)) |
+ (1 << LPC_USB_INT_EPOUT(AO_USB_OUT_EP)) |
+ (1 << LPC_USB_INT_EPIN(AO_USB_IN_EP)) |
+ (1 << LPC_USB_INT_DEV));
ao_arch_release_interrupts();
+ lpc_usb.devcmdstat = 0;
for (t = 0; t < 1000; t++)
ao_arch_nop();
- /* Enable USB pull-up */
- lpc_syscfg.pmc |= (1 << USB_SYSCFG_PMC_USB_PU);
+
+ ao_usb_set_ep0();
}
#if USB_ECHO
ao_usb_enable();
debug ("ao_usb_init\n");
- ao_add_task(&ao_usb_task, ao_usb_ep0, "usb");
#if USB_ECHO
ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo");
#endif
uint32_t primask;
#if TX_DBG
uint16_t in_count;
- uint32_t in_epr;
+ uint32_t in_ep;
uint32_t in_pending;
uint32_t tx_count;
uint32_t in_flushed;
uint8_t rx_count;
uint8_t rx_pos;
uint8_t out_avail;
- uint32_t out_epr;
+ uint32_t out_ep;
#endif
};
-#define NUM_USB_DBG 128
+#define NUM_USB_DBG 8
-static struct ao_usb_dbg dbg[128];
+static struct ao_usb_dbg dbg[NUM_USB_DBG];
static int dbg_i;
static void _dbg(int line, char *msg, uint32_t value)
dbg[dbg_i].primask = primask;
#if TX_DBG
dbg[dbg_i].in_count = in_count;
- dbg[dbg_i].in_epr = lpc_usb.epr[AO_USB_IN_EPR];
+ dbg[dbg_i].in_ep = *ao_usb_epn_in(AO_USB_IN_EP);
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;
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 = lpc_usb.epr[AO_USB_OUT_EPR];
+ dbg[dbg_i].out_ep = *ao_usb_epn_out(AO_USB_OUT_EP);
#endif
if (++dbg_i == NUM_USB_DBG)
dbg_i = 0;
projects / fw / altos / commitdiff