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nes-proj/drivers/cpu/arm/at91sam7s/usb-arch.c

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#include <usb-arch.h>
#include <usb-interrupt.h>
#include <AT91SAM7S64.h>
#include <stdio.h>
#include <debug-uart.h>
/* #define DEBUG */
#ifdef DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#define USB_PULLUP_PIN AT91C_PIO_PA16
#ifndef AT91C_UDP_STALLSENT
#define AT91C_UDP_STALLSENT AT91C_UDP_ISOERROR
#endif
/* Bits that won't effect the state if they're written at a specific level.
*/
/* Bits that should be written as 1 */
#define NO_EFFECT_BITS (AT91C_UDP_TXCOMP | AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RXSETUP \
| AT91C_UDP_ISOERROR | AT91C_UDP_RX_DATA_BK1)
/* Also includes bits that should be written as 0 */
#define NO_EFFECT_MASK (NO_EFFECT_BITS | AT91C_UDP_TXPKTRDY)
#define RXBYTECNT(s) (((s)>>16)&0x7ff)
static inline void
udp_set_ep_ctrl_flags(AT91_REG *reg, unsigned int flags,
unsigned int write_mask, unsigned int check_mask)
{
while ( (*reg & check_mask) != (flags & check_mask)) {
*reg = (*reg & ~write_mask) | flags;
}
}
#define UDP_SET_EP_CTRL_FLAGS(reg, flags, mask) \
udp_set_ep_ctrl_flags((reg), \
(NO_EFFECT_BITS & ~(mask)) | ((flags) & (mask)), (mask) | NO_EFFECT_MASK,\
(mask))
#define USB_DISABLE_INT *AT91C_AIC_IDCR = (1 << AT91C_ID_UDP)
#define USB_ENABLE_INT *AT91C_AIC_IECR = (1 << AT91C_ID_UDP)
#define USB_DISABLE_EP_INT(hw_ep) *AT91C_UDP_IDR = (1 << (hw_ep))
#define USB_ENABLE_EP_INT(hw_ep) *AT91C_UDP_IER = (1 << (hw_ep))
#if CTRL_EP_SIZE > 8
#error Control endpoint size too big
#endif
#if USB_EP1_SIZE > 64
#error Endpoint 1 size too big
#endif
#if USB_EP2_SIZE > 64
#error Endpoint 2 size too big
#endif
#if USB_EP3_SIZE > 64
#error Endpoint 3 size too big
#endif
static const uint16_t ep_xfer_size[8] =
{
CTRL_EP_SIZE,
USB_EP1_SIZE,
USB_EP2_SIZE,
USB_EP3_SIZE
};
#define USB_EP_XFER_SIZE(ep) ep_xfer_size[ep]
typedef struct _USBEndpoint USBEndpoint;
struct _USBEndpoint
{
uint16_t status;
uint8_t addr;
uint8_t flags;
USBBuffer *buffer; /* NULL if no current buffer */
struct process *event_process;
unsigned int events;
uint16_t xfer_size;
};
#define USB_EP_FLAGS_TYPE_MASK 0x03
#define USB_EP_FLAGS_TYPE_BULK 0x00
#define USB_EP_FLAGS_TYPE_CONTROL 0x01
#define USB_EP_FLAGS_TYPE_ISO 0x02
#define USB_EP_FLAGS_TYPE_INTERRUPT 0x03
#define EP_TYPE(ep) ((ep)->flags & USB_EP_FLAGS_TYPE_MASK)
#define IS_EP_TYPE(ep, type) (EP_TYPE(ep) == (type))
#define IS_CONTROL_EP(ep) IS_EP_TYPE(ep, USB_EP_FLAGS_TYPE_CONTROL)
#define IS_BULK_EP(ep) IS_EP_TYPE(ep, USB_EP_FLAGS_TYPE_BULK)
#define USB_EP_FLAGS_ENABLED 0x04
/* A packet has been received but the data is still in hardware buffer */
#define USB_EP_FLAGS_RECV_PENDING 0x08
/* The pending packet is a SETUP packet */
#define USB_EP_FLAGS_SETUP_PENDING 0x10
/* The data in the hardware buffer is being transmitted */
#define USB_EP_FLAGS_TRANSMITTING 0x20
/* The receiver is waiting for a packet */
#define USB_EP_FLAGS_RECEIVING 0x40
/* For bulk endpoints. Both buffers are busy are in use, either by
hardware or software. */
#define USB_EP_FLAGS_DOUBLE 0x80
/* The next packet received should be read from bank 1 if possible */
#define USB_EP_FLAGS_BANK_1_RECV_NEXT 0x10
/* States for double buffered reception:
Packets being received 0 1 2 1 0 0
Packets pending 0 0 0 1 2 1
RECVING 0 1 1 1 0 0
RECV_PENDING 0 0 0 1 1 1
DOUBLE 0 0 1 0 1 0
*/
/* States for double buffered transmission:
Packets being transmitted 0 1 2
TRANSMITTING 0 1 1
DOUBLE 0 0 1
*/
/* Index in endpoint array */
#define EP_INDEX(addr) ((addr) & 0x7f)
/* Get address of endpoint struct */
#define EP_STRUCT(addr) &usb_endpoints[EP_INDEX(addr)];
/* Number of hardware endpoint */
#define EP_HW_NUM(addr) ((addr) & 0x7f)
static USBEndpoint usb_endpoints[USB_MAX_ENDPOINTS];
struct process *event_process = 0;
volatile unsigned int events = 0;
static void
notify_process(unsigned int e)
{
events |= e;
if (event_process) {
process_poll(event_process);
}
}
static void
notify_ep_process(USBEndpoint *ep, unsigned int e)
{
ep->events |= e;
if (ep->event_process) {
process_poll(ep->event_process);
}
}
static void
usb_arch_reset(void)
{
unsigned int e;
for (e = 0; e < USB_MAX_ENDPOINTS; e++) {
if (usb_endpoints[e].flags &USB_EP_FLAGS_ENABLED) {
USBBuffer *buffer = usb_endpoints[e].buffer;
usb_endpoints[e].flags = 0;
usb_disable_endpoint(e);
while(buffer) {
buffer->flags &= ~USB_BUFFER_SUBMITTED;
buffer = buffer->next;
}
}
}
usb_arch_setup_control_endpoint(0);
}
void
usb_arch_setup(void)
{
unsigned int i;
/* Assume 96MHz PLL frequency */
*AT91C_CKGR_PLLR = ((*AT91C_CKGR_PLLR & ~AT91C_CKGR_USBDIV)
| AT91C_CKGR_USBDIV_1);
/* Enable 48MHz USB clock */
*AT91C_PMC_SCER = AT91C_PMC_UDP;
/* Enable USB main clock */
*AT91C_PMC_PCER = (1 << AT91C_ID_UDP);
/* Enable pullup */
*AT91C_PIOA_PER = USB_PULLUP_PIN;
*AT91C_PIOA_OER = USB_PULLUP_PIN;
*AT91C_PIOA_CODR = USB_PULLUP_PIN;
for(i = 0; i < USB_MAX_ENDPOINTS; i++) {
usb_endpoints[i].flags = 0;
usb_endpoints[i].event_process = 0;
}
usb_arch_reset();
/* Enable usb_interrupt */
AT91C_AIC_SMR[AT91C_ID_UDP] = AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL | 4;
AT91C_AIC_SVR[AT91C_ID_UDP] = (unsigned long) usb_int;
*AT91C_AIC_IECR = (1 << AT91C_ID_UDP);
}
static void
usb_arch_setup_endpoint(unsigned char addr, unsigned int hw_type)
{
unsigned int ei = EP_HW_NUM(addr);
USBEndpoint *ep = EP_STRUCT(addr);
ep->status = 0;
ep->flags = USB_EP_FLAGS_ENABLED;
ep->buffer = 0;
ep->addr = addr;
ep->events = 0;
ep->xfer_size = 0;
*AT91C_UDP_IDR = 1<<ei;
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[ei], hw_type | AT91C_UDP_EPEDS,
AT91C_UDP_EPTYPE | AT91C_UDP_EPEDS);
*AT91C_UDP_IER = 1<<ei;
};
void
usb_arch_setup_control_endpoint(unsigned char addr)
{
unsigned int ei = EP_HW_NUM(addr);
USBEndpoint *ep = EP_STRUCT(addr);
usb_arch_setup_endpoint(addr, AT91C_UDP_EPTYPE_CTRL);
ep->flags |= USB_EP_FLAGS_TYPE_CONTROL;
ep->xfer_size = ep_xfer_size[ei];
}
void
usb_arch_setup_bulk_endpoint(unsigned char addr)
{
unsigned int ei = EP_HW_NUM(addr);
USBEndpoint *ep = EP_STRUCT(addr);
usb_arch_setup_endpoint(addr, ((addr & 0x80)
? AT91C_UDP_EPTYPE_BULK_IN
: AT91C_UDP_EPTYPE_BULK_OUT));
ep->flags |= USB_EP_FLAGS_TYPE_BULK;
ep->xfer_size = ep_xfer_size[ei];
}
void
usb_arch_setup_interrupt_endpoint(unsigned char addr)
{
unsigned int ei = EP_HW_NUM(addr);
USBEndpoint *ep = EP_STRUCT(addr);
usb_arch_setup_endpoint(addr, ((addr & 0x80)
? AT91C_UDP_EPTYPE_INT_IN
: AT91C_UDP_EPTYPE_INT_OUT));
ep->flags |= USB_EP_FLAGS_TYPE_BULK;
ep->xfer_size = ep_xfer_size[ei];
}
void
usb_arch_disable_endpoint(uint8_t addr)
{
USBEndpoint *ep = EP_STRUCT(addr);
ep->flags &= ~USB_EP_FLAGS_ENABLED;
*AT91C_UDP_IDR = 1<<EP_HW_NUM(addr);
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[EP_HW_NUM(addr)], 0, AT91C_UDP_EPEDS);
}
#define USB_READ_BLOCK 0x01 /* The currently submitted buffers
can't hold the received data, wait
for more buffers. No data was read
from the hardware buffer */
#define USB_READ_NOTIFY 0x02 /* Some buffers that had the
USB_BUFFER_NOTIFY flags set were
released */
#define USB_READ_FAIL 0x04 /* The received data doesn't match the
submitted buffers. The hardware
buffer is discarded. */
/* Skip buffers until mask and flags matches*/
static USBBuffer *
skip_buffers_until(USBBuffer *buffer, unsigned int mask, unsigned int flags,
unsigned int *resp)
{
while(buffer && !((buffer->flags & mask) == flags)) {
USBBuffer *next = buffer->next;
buffer->flags &= ~USB_BUFFER_SUBMITTED ;
buffer->flags |= USB_BUFFER_FAILED;
if (buffer->flags & USB_BUFFER_NOTIFY) *resp |= USB_READ_NOTIFY;
buffer = next;
}
return buffer;
}
static void
read_hw_buffer(uint8_t *data, unsigned int hw_ep, unsigned int len)
{
AT91_REG *fdr;
fdr = &AT91C_UDP_FDR[hw_ep];
while(len-- > 0) {
*data++ = *fdr;
}
}
#define USB_WRITE_BLOCK 0x01
#define USB_WRITE_NOTIFY 0x02
void
write_hw_buffer(const uint8_t *data, unsigned int hw_ep, unsigned int len)
{
AT91_REG *fdr;
fdr = &AT91C_UDP_FDR[hw_ep];
/* PRINTF("Write %d\n", len); */
while(len-- > 0) {
*fdr = *data++;
}
}
static unsigned int
get_receive_capacity(USBBuffer *buffer)
{
unsigned int capacity = 0;
while(buffer && !(buffer->flags & (USB_BUFFER_IN| USB_BUFFER_SETUP|USB_BUFFER_HALT))) {
capacity += buffer->left;
buffer = buffer->next;
}
return capacity;
}
static int
handle_pending_receive(USBEndpoint *ep)
{
int short_packet;
unsigned int len;
unsigned int copy;
unsigned int res = 0;
unsigned int hw_ep = EP_HW_NUM(ep->addr);
USBBuffer *buffer = ep->buffer;
uint8_t *setup_data = NULL;
unsigned int flags = ep->flags;
if (!(flags & USB_EP_FLAGS_ENABLED) || !buffer) return USB_READ_BLOCK;
len = RXBYTECNT(AT91C_UDP_CSR[hw_ep]);
PRINTF("handle_pending_receive: %d\n", len);
switch(flags & USB_EP_FLAGS_TYPE_MASK) {
case USB_EP_FLAGS_TYPE_CONTROL:
if (flags & USB_EP_FLAGS_SETUP_PENDING) {
/* Discard buffers until we find a SETUP buffer */
buffer =
skip_buffers_until(buffer, USB_BUFFER_SETUP, USB_BUFFER_SETUP, &res);
ep->buffer = buffer;
if (!buffer || buffer->left < len) {
res |= USB_READ_BLOCK;
return res;
}
/* SETUP packet must fit in a single buffer */
if (buffer->left < len) {
buffer->flags |= USB_BUFFER_FAILED;
buffer->flags &= ~USB_BUFFER_SUBMITTED ;
if (buffer->flags & USB_BUFFER_NOTIFY) res |= USB_READ_NOTIFY;
ep->buffer = buffer->next;
res |= USB_READ_FAIL;
return res;
}
setup_data = buffer->data;
} else {
if (buffer->flags & (USB_BUFFER_SETUP|USB_BUFFER_IN)) {
buffer->flags |= USB_BUFFER_FAILED;
buffer->flags &= ~USB_BUFFER_SUBMITTED ;
if (buffer->flags & USB_BUFFER_NOTIFY) res |= USB_READ_NOTIFY;
ep->buffer = buffer->next;
res |= USB_READ_FAIL;
return res;
}
if (len == 0) {
/* Status OUT */
if (buffer->left > 0) {
buffer->flags |= USB_BUFFER_FAILED;
res |= USB_READ_FAIL;
}
buffer->flags &= ~USB_BUFFER_SUBMITTED ;
if (buffer->flags & USB_BUFFER_NOTIFY) res |= USB_READ_NOTIFY;
ep->buffer = buffer->next;
return res;
}
if (get_receive_capacity(buffer) < len) return USB_READ_BLOCK;
}
break;
case USB_EP_FLAGS_TYPE_INTERRUPT:
case USB_EP_FLAGS_TYPE_BULK:
case USB_EP_FLAGS_TYPE_ISO:
if (get_receive_capacity(buffer) < len) {
return USB_READ_BLOCK;
}
break;
}
short_packet = len < ep->xfer_size;
do {
if (buffer->left < len) {
copy = buffer->left;
} else {
copy = len;
}
len -= copy;
buffer->left -= copy;
read_hw_buffer(buffer->data, hw_ep, copy);
buffer->data += copy;
if (len == 0) break;
/* Release buffer */
buffer->flags &= ~(USB_BUFFER_SUBMITTED | USB_BUFFER_SHORT_PACKET);
if (buffer->flags & USB_BUFFER_NOTIFY) res |= USB_READ_NOTIFY;
/* Use next buffer. */
buffer = buffer->next;
} while(1);
if (short_packet) {
buffer->flags |= USB_BUFFER_SHORT_PACKET;
}
if ((buffer->left == 0)
|| (buffer->flags & USB_BUFFER_PACKET_END)
|| (short_packet && (buffer->flags & USB_BUFFER_SHORT_END))) {
/* Release buffer */
buffer->flags &= ~USB_BUFFER_SUBMITTED;
if (buffer->flags & USB_BUFFER_NOTIFY) res |= USB_READ_NOTIFY;
/* Use next buffer. */
buffer = buffer->next;
}
ep->buffer = buffer;
if (setup_data) {
/* Set direction according to request */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[0],
((setup_data[0] & 0x80)
? AT91C_UDP_DIR : 0), AT91C_UDP_DIR);
}
return res;
}
static void
start_receive(USBEndpoint *ep)
{
ep->flags |= USB_EP_FLAGS_RECEIVING;
}
#if 0
static unsigned int
get_transmit_length(USBBuffer *buffer)
{
unsigned int length = 0;
while(buffer && (buffer->flags & USB_BUFFER_IN)) {
length += buffer->left;
buffer = buffer->next;
}
return length;
}
#endif
static int
start_transmit(USBEndpoint *ep)
{
unsigned int res = 0;
USBBuffer *buffer = ep->buffer;
unsigned int len;
unsigned int hw_ep = EP_HW_NUM(ep->addr);
unsigned int ep_flags = ep->flags;
len = ep->xfer_size;
if (!(ep_flags & USB_EP_FLAGS_ENABLED) || !buffer) return USB_WRITE_BLOCK;
switch(ep_flags & USB_EP_FLAGS_TYPE_MASK) {
case USB_EP_FLAGS_TYPE_BULK:
if (buffer->flags & USB_BUFFER_HALT) {
if (ep->status & 0x01) return USB_WRITE_BLOCK;
ep->status |= 0x01;
if (!(ep->flags & USB_EP_FLAGS_TRANSMITTING)) {
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],
AT91C_UDP_FORCESTALL, AT91C_UDP_FORCESTALL);
PRINTF("HALT IN\n");
}
return USB_WRITE_BLOCK;
}
case USB_EP_FLAGS_TYPE_ISO:
if (!(ep->flags & USB_EP_FLAGS_TRANSMITTING)) {
if (AT91C_UDP_CSR[hw_ep] & AT91C_UDP_TXPKTRDY) return USB_WRITE_BLOCK;
}
break;
default:
if (AT91C_UDP_CSR[hw_ep] & AT91C_UDP_TXPKTRDY) return USB_WRITE_BLOCK;
}
while (buffer) {
unsigned int copy;
if (buffer->left < len) {
copy = buffer->left;
} else {
copy = len;
}
len -= copy;
buffer->left -= copy;
write_hw_buffer(buffer->data, hw_ep, copy);
buffer->data += copy;
if (buffer->left == 0) {
if (buffer->flags & USB_BUFFER_SHORT_END) {
if (len == 0) {
/* Send zero length packet. */
break;
} else {
len = 0;
}
}
/* Release buffer */
buffer->flags &= ~USB_BUFFER_SUBMITTED;
if (buffer->flags & USB_BUFFER_NOTIFY) res = USB_WRITE_NOTIFY;
/* Use next buffer. */
buffer = buffer->next;
}
if (len == 0) break;
}
ep->buffer = buffer;
if (ep->flags & USB_EP_FLAGS_TRANSMITTING) {
ep->flags |= USB_EP_FLAGS_DOUBLE;
} else {
ep->flags |= USB_EP_FLAGS_TRANSMITTING;
}
PRINTF("start_transmit: sent %08x\n",AT91C_UDP_CSR[hw_ep]);
/* Start transmission */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],
AT91C_UDP_TXPKTRDY, AT91C_UDP_TXPKTRDY);
return res;
}
static void
start_transfer(USBEndpoint *ep)
{
unsigned int hw_ep = EP_HW_NUM(ep->addr);
int res;
while (1) {
if (!(ep->addr & 0x80)) {
if (ep->buffer && (ep->buffer->flags & USB_BUFFER_HALT)) {
if (ep->status & 0x01) return ;
ep->status |= 0x01;
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[EP_HW_NUM(ep->addr)],
AT91C_UDP_FORCESTALL, AT91C_UDP_FORCESTALL);
PRINTF("HALT OUT\n");
*AT91C_UDP_IDR = 1<<hw_ep;
return;
}
}
if (!(ep->flags & USB_EP_FLAGS_RECV_PENDING)) break;
res = handle_pending_receive(ep);
if (res & USB_READ_NOTIFY) {
notify_ep_process(ep, USB_EP_EVENT_NOTIFICATION);
}
PRINTF("received res = %d\n", res);
if (res & USB_READ_BLOCK) {
*AT91C_UDP_IDR = 1<<hw_ep;
return;
}
if (AT91C_UDP_CSR[hw_ep] & AT91C_UDP_RXSETUP) {
/* Acknowledge SETUP */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],0, AT91C_UDP_RXSETUP);
} else if (AT91C_UDP_CSR[hw_ep] & (AT91C_UDP_RX_DATA_BK1)) {
/* Ping-pong */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],0,
(ep->flags & USB_EP_FLAGS_BANK_1_RECV_NEXT)
? AT91C_UDP_RX_DATA_BK1
: AT91C_UDP_RX_DATA_BK0);
ep->flags ^= USB_EP_FLAGS_BANK_1_RECV_NEXT;
} else {
/* Ping-pong or single buffer */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],0,
AT91C_UDP_RX_DATA_BK0);
ep->flags |= USB_EP_FLAGS_BANK_1_RECV_NEXT;
}
if (ep->flags & USB_EP_FLAGS_DOUBLE) {
ep->flags &= ~USB_EP_FLAGS_DOUBLE;
} else if IS_CONTROL_EP(ep) {
ep->flags &= ~(USB_EP_FLAGS_RECV_PENDING|USB_EP_FLAGS_SETUP_PENDING);
} else {
ep->flags &= ~USB_EP_FLAGS_RECV_PENDING;
}
if (res & USB_READ_FAIL) {
/* Only fails for control endpoints */
usb_arch_control_stall(ep->addr);
return;
}
*AT91C_UDP_IER = 1<<hw_ep;
}
if (ep->flags & (USB_EP_FLAGS_TRANSMITTING | USB_EP_FLAGS_RECEIVING)) {
#if 0
if (!IS_BULK_EP(ep) || (ep->flags & USB_EP_FLAGS_DOUBLE)) {
#else
if(1) {
#endif
PRINTF("Busy\n");
return;
}
}
if (ep->status & 0x01) return; /* Don't start transfer if halted */
if (ep->buffer) {
if (ep->buffer->flags & USB_BUFFER_IN) {
res = start_transmit(ep);
if (res & USB_WRITE_NOTIFY) {
notify_ep_process(ep, USB_EP_EVENT_NOTIFICATION);
}
} else {
start_receive(ep);
}
}
}
void
usb_arch_transfer_complete(unsigned int hw_ep)
{
unsigned int status = AT91C_UDP_CSR[hw_ep];
USBEndpoint *ep = &usb_endpoints[hw_ep];
PRINTF("transfer_complete: %d\n", hw_ep);
if (status & AT91C_UDP_STALLSENT) {
/* Acknowledge */
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],0, AT91C_UDP_STALLSENT);
}
if (status & (AT91C_UDP_RXSETUP
| AT91C_UDP_RX_DATA_BK1 | AT91C_UDP_RX_DATA_BK0)) {
if (status & AT91C_UDP_RXSETUP) {
PRINTF("SETUP\n");
ep->flags |= USB_EP_FLAGS_SETUP_PENDING;
}
if (ep->flags & USB_EP_FLAGS_DOUBLE) {
ep->flags &= ~USB_EP_FLAGS_DOUBLE;
} else {
ep->flags &= ~USB_EP_FLAGS_RECEIVING;
}
if ( ep->flags & USB_EP_FLAGS_RECV_PENDING) {
ep->flags |= USB_EP_FLAGS_DOUBLE;
} else {
ep->flags |= USB_EP_FLAGS_RECV_PENDING;
}
start_transfer(ep);
}
if (status & AT91C_UDP_TXCOMP) {
PRINTF("Sent packet\n");
if (ep->flags & USB_EP_FLAGS_DOUBLE) {
ep->flags &= ~USB_EP_FLAGS_DOUBLE;
} else {
ep->flags &= ~USB_EP_FLAGS_TRANSMITTING;
}
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],0, AT91C_UDP_TXCOMP);
if (ep->status & 0x01) {
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[hw_ep],
AT91C_UDP_FORCESTALL, AT91C_UDP_FORCESTALL);
PRINTF("HALT IN\n");
} else {
start_transfer(ep);
}
}
}
void
usb_set_ep_event_process(unsigned char addr, struct process *p)
{
USBEndpoint *ep = &usb_endpoints[EP_INDEX(addr)];
ep->event_process = p;
}
/* Select what process should be polled when a global event occurs */
void
usb_arch_set_global_event_process(struct process *p)
{
event_process = p;
}
unsigned int
usb_arch_get_global_events(void)
{
unsigned int e;
USB_DISABLE_INT;
e = events;
events = 0;
USB_ENABLE_INT;
return e;
}
unsigned int
usb_get_ep_events(unsigned char addr)
{
unsigned int e;
unsigned int ei = EP_HW_NUM(addr);
USB_DISABLE_INT;
e = usb_endpoints[ei].events;
usb_endpoints[ei].events = 0;
USB_ENABLE_INT;
return e;
}
void
usb_submit_recv_buffer(unsigned char ep_addr, USBBuffer *buffer)
{
USBBuffer **tailp;
USBEndpoint *ep = &usb_endpoints[EP_INDEX(ep_addr)];
if (!(ep->flags & USB_EP_FLAGS_ENABLED)) return;
/* PRINTF("buffer: %p\n", ep->buffer); */
/* dbg_drain(); */
USB_DISABLE_INT;
tailp = (USBBuffer**)&ep->buffer;
while(*tailp) {
tailp = &(*tailp)->next;
}
*tailp = buffer;
while(buffer) {
buffer->flags |= USB_BUFFER_SUBMITTED;
buffer = buffer->next;
}
start_transfer(ep);
USB_ENABLE_INT;
}
void
usb_submit_xmit_buffer(unsigned char ep_addr, USBBuffer *buffer)
{
USBBuffer **tailp;
USBEndpoint *ep = &usb_endpoints[EP_INDEX(ep_addr)];
if (!(ep->flags & USB_EP_FLAGS_ENABLED)) return;
/* PRINTF("usb_submit_xmit_buffer %d\n", buffer->left); */
USB_DISABLE_INT;
tailp = (USBBuffer**)&ep->buffer;
while(*tailp) {
tailp = &(*tailp)->next;
}
*tailp = buffer;
while(buffer) {
buffer->flags |= USB_BUFFER_SUBMITTED | USB_BUFFER_IN;
buffer = buffer->next;
}
start_transfer(ep);
USB_ENABLE_INT;
}
void
usb_arch_discard_all_buffers(unsigned char ep_addr)
{
USBBuffer *buffer;
volatile USBEndpoint *ep = &usb_endpoints[EP_INDEX(ep_addr)];
USB_DISABLE_EP_INT(EP_HW_NUM(ep_addr));
buffer = ep->buffer;
ep->buffer = NULL;
USB_ENABLE_EP_INT(EP_HW_NUM(ep_addr));
while(buffer) {
buffer->flags &= ~USB_BUFFER_SUBMITTED;
buffer = buffer->next;
}
}
uint16_t
usb_arch_get_ep_status(uint8_t addr)
{
if (EP_INDEX(addr) > USB_MAX_ENDPOINTS) return 0;
return usb_endpoints[EP_INDEX(addr)].status;
}
void
usb_arch_set_configuration(uint8_t usb_configuration_value)
{
/* Nothing needs to be done */
}
void
usb_arch_control_stall(unsigned char addr)
{
if (EP_INDEX(addr) > USB_MAX_ENDPOINTS) return;
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[EP_HW_NUM(addr)],
AT91C_UDP_FORCESTALL, AT91C_UDP_FORCESTALL);
}
/* Not for control endpoints */
void
usb_arch_halt_endpoint(unsigned char ep_addr, int halt)
{
if (EP_INDEX(ep_addr) > USB_MAX_ENDPOINTS) return;
if (!usb_endpoints[EP_INDEX(ep_addr)].flags & USB_EP_FLAGS_ENABLED) return;
*AT91C_UDP_IDR = 1<<EP_HW_NUM(ep_addr);
if (halt) {
usb_endpoints[EP_INDEX(ep_addr)].status |= 0x01;
/* Delay stall if a transmission is i progress */
if (!(usb_endpoints[EP_INDEX(ep_addr)].flags & USB_EP_FLAGS_TRANSMITTING)){
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[EP_HW_NUM(ep_addr)],
AT91C_UDP_FORCESTALL, AT91C_UDP_FORCESTALL);
}
} else {
USBEndpoint *ep = &usb_endpoints[EP_INDEX(ep_addr)];
ep->status &= ~0x01;
*AT91C_UDP_IDR = 1<<EP_HW_NUM(ep_addr);
UDP_SET_EP_CTRL_FLAGS(&AT91C_UDP_CSR[EP_HW_NUM(ep_addr)],
0, AT91C_UDP_FORCESTALL);
*AT91C_UDP_RSTEP = 1<<EP_HW_NUM(ep_addr);
*AT91C_UDP_RSTEP = 0;
/* Release HALT buffer */
if (ep->buffer && (ep->buffer->flags & USB_BUFFER_HALT)) {
ep->buffer->flags &= ~USB_BUFFER_SUBMITTED;
if (ep->buffer->flags & USB_BUFFER_NOTIFY) {
notify_ep_process(ep,USB_EP_EVENT_NOTIFICATION);
}
ep->buffer = ep->buffer->next;
}
/* Restart transmission */
start_transfer(&usb_endpoints[EP_INDEX(ep_addr)]);
}
*AT91C_UDP_IER = 1<<EP_HW_NUM(ep_addr);
}
int
usb_arch_send_pending(uint8_t ep_addr)
{
return usb_endpoints[EP_INDEX(ep_addr)].flags & USB_EP_FLAGS_TRANSMITTING;
}
void
usb_arch_set_address(unsigned char addr)
{
*AT91C_UDP_FADDR = AT91C_UDP_FEN | addr;
*AT91C_UDP_GLBSTATE |= AT91C_UDP_FADDEN;
}
void
usb_arch_reset_int()
{
usb_arch_reset();
notify_process(USB_EVENT_RESET);
}
void
usb_arch_suspend_int()
{
notify_process(USB_EVENT_SUSPEND);
}
void
usb_arch_resume_int()
{
notify_process(USB_EVENT_RESUME);
}
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