//===========================================================================
// Initialize CAN driver
//===========================================================================
static void can_init(can_channel *chan)
{
can_cbuf_t *cbuf;
if (chan->init)
{
return;
}
cbuf = &chan->in_cbuf;
cbuf->waiting = false;
cbuf->abort = false;
#ifdef CYGOPT_IO_CAN_SUPPORT_NONBLOCKING
cbuf->blocking = true;
#endif
cyg_drv_mutex_init(&cbuf->lock);
cyg_drv_cond_init(&cbuf->wait, &cbuf->lock);
cbuf = &chan->out_cbuf;
cbuf->waiting = false;
cbuf->abort = false;
#ifdef CYGOPT_IO_CAN_SUPPORT_NONBLOCKING
cbuf->blocking = true;
#endif
cyg_drv_mutex_init(&cbuf->lock);
cyg_drv_cond_init(&cbuf->wait, &cbuf->lock);
chan->init = true;
}
/* Initialise the resolver. Open a socket and bind it to the address
of the server. return -1 if something goes wrong, otherwise 0 */
int
redboot_dns_res_init(void)
{
memset((char *)&server, 0, sizeof(server));
server.sin_len = sizeof(server);
server.sin_family = AF_INET;
server.sin_port = htons(DOMAIN_PORT);
cyg_drv_mutex_init(&dns_mutex);
#ifdef CYGSEM_REDBOOT_FLASH_CONFIG
{
ip_addr_t dns_ip;
flash_get_config("dns_ip", &dns_ip, CONFIG_IP);
if (dns_ip[0] == 0 && dns_ip[1] == 0 && dns_ip[2] == 0 && dns_ip[3] == 0)
return -1;
memcpy(&server.sin_addr, &dns_ip, sizeof(dns_ip));
/* server config is valid */
s = 0;
}
#else
// Use static configuration
set_dns(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_IP));
#endif
return 0;
}
static cyg_bool
disk_init(struct cyg_devtab_entry *tab)
{
disk_channel *chan = (disk_channel *) tab->priv;
cyg_disk_info_t *info = chan->info;
int i;
//diag_printf("file test:disk_init\n");
if (!chan->init)
{
disk_controller *controller = chan->controller;
if( !controller->init )
{
cyg_drv_mutex_init( &controller->lock );
cyg_drv_cond_init( &controller->queue, &controller->lock );
cyg_drv_cond_init( &controller->async, &controller->lock );
controller->init = true;
}
info->connected = false;
// clear partition data
for (i = 0; i < info->partitions_num; i++)
info->partitions[i].type = 0x00;
//info->partitions.type = 0x00;
chan->init = true;
}
//diag_printf("file test:disk_init end\n");
return true;
}
//==========================================================================
// Initialize driver & hardware state
//==========================================================================
void cyg_lpc2xxx_i2c_init(struct cyg_i2c_bus *bus)
{
cyg_lpc2xxx_i2c_extra* extra = (cyg_lpc2xxx_i2c_extra*)bus->i2c_extra;
cyg_uint16 duty_cycle;
cyg_drv_mutex_init(&extra->i2c_lock);
cyg_drv_cond_init(&extra->i2c_wait, &extra->i2c_lock);
cyg_drv_interrupt_create(I2C_ISRVEC(extra),
I2C_ISRPRI(extra),
(cyg_addrword_t) extra,
&lpc2xxx_i2c_isr,
&lpc2xxx_i2c_dsr,
&(extra->i2c_interrupt_handle),
&(extra->i2c_interrupt_data));
cyg_drv_interrupt_attach(extra->i2c_interrupt_handle);
CLR_CON(extra, CON_EN | CON_STA | CON_SI | CON_AA);
HAL_WRITE_UINT8(I2C_ADR(extra), 0);
//
// Setup I2C bus frequency
//
duty_cycle = (I2C_CLK(extra) / I2C_BUS_FREQ(extra)) / 2;
HAL_WRITE_UINT16(I2C_SCLL(extra), duty_cycle);
HAL_WRITE_UINT16(I2C_SCLH(extra), duty_cycle);
SET_CON(extra, CON_EN);
}
void
hasp_mpc5xxx_i2c_init()
{
initReset(); // initialise the reset pin
resetHigh();
cyg_drv_mutex_init(&i2c_lock);
cyg_drv_cond_init(&i2c_wait, &i2c_lock);
cyg_drv_interrupt_create(i2c_intr_vector,
0,
(cyg_addrword_t) 0,
&mpc5xxx_i2c_isr,
&mpc5xxx_i2c_dsr,
&(i2c_interrupt_handle),
&(i2c_interrupt_data));
cyg_drv_interrupt_attach(i2c_interrupt_handle);
HAL_WRITE_UINT32(I2C_0_FDR_REG, 0x89000000); // Set clock to 100MHz / 352
HAL_WRITE_UINT32(I2C_0_ADDRESS_REG, 0x00000000); // Set MPC5xxx slave address, not useful to us
HAL_WRITE_UINT32(I2C_0_CONTROL_REG, I2C_ENABLE); // Enable the I2C device but do not start any transfers and leave interrupts disabled.
HAL_WRITE_UINT32(I2C_0_STATUS_REG, 0x00000000); // Clear any pending conditions including interrupts.
HAL_INTERRUPT_UNMASK(i2c_intr_vector); // Interrupts can now be safely unmasked
i2c_flag = 0;
resetLow();
}
/* Initialise the resolver. Open a socket and bind it to the address
of the server. return -1 if something goes wrong, otherwise 0. If
we are being called a second time we have to be careful to allow
any ongoing lookups to finish before we close the socket and
connect to a different DNS server. The danger here is that we may
have to wait for upto 32 seconds if the DNS server is down.
*/
int
cyg_dns_res_init(struct in_addr *dns_server)
{
struct sockaddr_in server;
struct servent *sent;
static int init =0;
CYG_REPORT_FUNCNAMETYPE( "cyg_dns_res_init", "returning %d" );
CYG_REPORT_FUNCARG1( "dns_server=%08x", dns_server );
CYG_CHECK_DATA_PTR( dns_server, "dns_server is not a valid pointer!" );
if (init) {
cyg_drv_mutex_lock(&dns_mutex);
cyg_thread_free_data_index(ptdindex);
if (s >= 0) {
close(s);
}
} else {
init = 1;
cyg_drv_mutex_init(&dns_mutex);
cyg_drv_mutex_lock(&dns_mutex);
}
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0) {
cyg_drv_mutex_unlock(&dns_mutex);
CYG_REPORT_RETVAL( -1 );
return -1;
}
sent = getservbyname("domain", "udp");
if (sent == (struct servent *)0) {
s = -1;
cyg_drv_mutex_unlock(&dns_mutex);
CYG_REPORT_RETVAL( -1 );
return -1;
}
memcpy((char *)&server.sin_addr, (const void *)dns_server, sizeof(server.sin_addr));
server.sin_port = sent->s_port;
server.sin_family = AF_INET;
server.sin_len = sizeof(server);
if (connect(s, (struct sockaddr *)&server, sizeof(server)) < 0) {
s = -1;
cyg_drv_mutex_unlock(&dns_mutex);
CYG_REPORT_RETVAL( -1 );
return -1;
}
ptdindex = cyg_thread_new_data_index();
cyg_drv_mutex_unlock(&dns_mutex);
CYG_REPORT_RETVAL( 0 );
return 0;
}
int jffs2_create_slab_caches(void)
{
struct jffs2_raw_node_ref * p;
cyg_drv_mutex_init(&mutex);
for (
p = rnr_pool;
p < rnr_pool + CYGNUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE - 1;
p++
)
p->next_phys = p + 1;
rnr_pool[CYGNUM_FS_JFFS2_RAW_NODE_REF_CACHE_POOL_SIZE - 1].next_phys = NULL;
first = &rnr_pool[0];
return 0;
}
void
cyg_spi_at91_bus_init(void)
{
// Create and attach SPI interrupt object
cyg_drv_interrupt_create(CYGNUM_HAL_INTERRUPT_SPI,
4,
(cyg_addrword_t)&cyg_spi_at91_bus,
spi_at91_ISR,
spi_at91_DSR,
&cyg_spi_at91_bus.spi_interrupt_handle,
&cyg_spi_at91_bus.spi_interrupt);
cyg_drv_interrupt_attach(cyg_spi_at91_bus.spi_interrupt_handle);
// Init transfer mutex and condition
cyg_drv_mutex_init(&cyg_spi_at91_bus.transfer_mx);
cyg_drv_cond_init(&cyg_spi_at91_bus.transfer_cond,
&cyg_spi_at91_bus.transfer_mx);
// Init flags
cyg_spi_at91_bus.transfer_end = true;
cyg_spi_at91_bus.cs_up = false;
// Soft reset the SPI controller
HAL_WRITE_UINT32(AT91_SPI+AT91_SPI_CR, AT91_SPI_CR_SWRST);
// Configure SPI pins
// NOTE: here we let the SPI controller control
// the data in, out and clock signals, but
// we need to handle the chip selects manually
// in order to achieve better chip select control
// inbetween transactions.
// Put SPI MISO, MOIS and SPCK pins into peripheral mode
HAL_WRITE_UINT32(AT91_SPI_PIO+AT91_PIO_PDR, AT91_PIO_PSR_SPCK |
AT91_PIO_PSR_MISO |
AT91_PIO_PSR_MOIS);
// Put SPI chip select pins in IO output mode
HAL_WRITE_UINT32(AT91_SPI_PIO+AT91_PIO_SODR, AT91_SPI_PIO_NPCS(0x0F));
HAL_WRITE_UINT32(AT91_SPI_PIO+AT91_PIO_PER, AT91_SPI_PIO_NPCS(0x0F));
HAL_WRITE_UINT32(AT91_SPI_PIO+AT91_PIO_OER, AT91_SPI_PIO_NPCS(0x0F));
// Call upper layer bus init
CYG_SPI_BUS_COMMON_INIT(&cyg_spi_at91_bus.spi_bus);
}
Cyg_ErrNo
usbs_devtab_cwrite(cyg_io_handle_t handle, const void* buf, cyg_uint32* size)
{
usbs_callback_data wait;
cyg_devtab_entry_t* devtab_entry;
usbs_tx_endpoint* endpoint;
int result = ENOERR;
CYG_REPORT_FUNCTION();
wait.completed = 0;
cyg_drv_mutex_init(&wait.lock);
cyg_drv_cond_init(&wait.signal, &wait.lock);
devtab_entry = (cyg_devtab_entry_t*) handle;
CYG_CHECK_DATA_PTR( devtab_entry, "A valid endpoint must be supplied");
endpoint = (usbs_tx_endpoint*) devtab_entry->priv;
CYG_CHECK_DATA_PTR( endpoint, "The handle must correspond to a USB endpoint");
CYG_CHECK_FUNC_PTR( endpoint->start_tx_fn, "The endpoint must have a start_tx function");
endpoint->buffer = (unsigned char*) buf;
endpoint->buffer_size = (int) *size;
endpoint->complete_fn = &usbs_devtab_callback;
endpoint->complete_data = (void*) &wait;
(*endpoint->start_tx_fn)(endpoint);
cyg_drv_mutex_lock(&wait.lock);
cyg_drv_dsr_lock();
while (!wait.completed) {
cyg_drv_cond_wait(&wait.signal);
}
cyg_drv_dsr_unlock();
cyg_drv_mutex_unlock(&wait.lock);
if (wait.result < 0) {
result = wait.result;
} else {
*size = wait.result;
}
cyg_drv_cond_destroy(&wait.signal);
cyg_drv_mutex_destroy(&wait.lock);
CYG_REPORT_RETURN();
return result;
}
static void spi_at91_init_bus(cyg_spi_at91_bus_t * spi_bus)
{
cyg_uint32 ctr;
// Create and attach SPI interrupt object
cyg_drv_interrupt_create(spi_bus->interrupt_number,
4,
(cyg_addrword_t)spi_bus,
spi_at91_ISR,
spi_at91_DSR,
&spi_bus->spi_interrupt_handle,
&spi_bus->spi_interrupt);
cyg_drv_interrupt_attach(spi_bus->spi_interrupt_handle);
// Init transfer mutex and condition
cyg_drv_mutex_init(&spi_bus->transfer_mx);
cyg_drv_cond_init(&spi_bus->transfer_cond,
&spi_bus->transfer_mx);
// Init flags
spi_bus->transfer_end = true;
spi_bus->cs_up = false;
// Soft reset the SPI controller
HAL_WRITE_UINT32(spi_bus->base+AT91_SPI_CR, AT91_SPI_CR_SWRST);
// Configure SPI pins
// Put SPI chip select pins in IO output mode
for(ctr = 0;ctr<4;ctr++)
{
if(spi_bus->cs_en[ctr])
{
HAL_ARM_AT91_GPIO_CFG_DIRECTION(spi_bus->cs_gpio[ctr],AT91_PIN_OUT);
HAL_ARM_AT91_GPIO_SET(spi_bus->cs_gpio[ctr]);
}
}
// Call upper layer bus init
CYG_SPI_BUS_COMMON_INIT(&spi_bus->spi_bus);
}
static void
serial_init(serial_channel *chan)
{
if (chan->init) return;
if (chan->out_cbuf.len != 0) {
#ifdef CYGDBG_IO_INIT
diag_printf("Set output buffer - buf: %x len: %d\n", chan->out_cbuf.data, chan->out_cbuf.len);
#endif
chan->out_cbuf.waiting = false;
chan->out_cbuf.abort = false;
#ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
chan->out_cbuf.blocking = true;
#endif
chan->out_cbuf.pending = 0;
cyg_drv_mutex_init(&chan->out_cbuf.lock);
cyg_drv_cond_init(&chan->out_cbuf.wait, &chan->out_cbuf.lock);
chan->out_cbuf.low_water = chan->out_cbuf.len / 4;
#ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
cyg_selinit( &chan->out_cbuf.selinfo );
#endif
}
if (chan->in_cbuf.len != 0) {
cbuf_t *cbuf = &chan->in_cbuf;
#ifdef CYGDBG_IO_INIT
diag_printf("Set input buffer - buf: %x len: %d\n", cbuf->data, cbuf->len);
#endif
cbuf->waiting = false;
cbuf->abort = false;
#ifdef CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING
cbuf->blocking = true;
#endif
#ifdef CYGPKG_IO_SERIAL_SELECT_SUPPORT
cyg_selinit( &cbuf->selinfo );
#endif
#ifdef CYGPKG_IO_SERIAL_FLOW_CONTROL
cbuf->low_water =
(CYGNUM_IO_SERIAL_FLOW_CONTROL_LOW_WATER_PERCENT * cbuf->len) / 100;
cbuf->high_water =
(CYGNUM_IO_SERIAL_FLOW_CONTROL_HIGH_WATER_PERCENT * cbuf->len) / 100;
# ifdef CYGOPT_IO_SERIAL_FLOW_CONTROL_SOFTWARE
// But make sure it is at least 35 below buffer size, to allow
// for 16 byte fifos, twice, plus some latency before s/w flow
// control can kick in. This doesn't apply to h/w flow control
// as it is near-instaneous
if ( (cbuf->len - cbuf->high_water) < 35 )
cbuf->high_water = cbuf->len - 35;
// and just in case...
if ( cbuf->high_water <= 0 )
cbuf->high_water = 1;
if ( cbuf->low_water > cbuf->high_water )
cbuf->low_water = cbuf->high_water;
# endif
#endif
cyg_drv_mutex_init(&cbuf->lock);
cyg_drv_cond_init(&cbuf->wait, &cbuf->lock);
}
#ifdef CYGOPT_IO_SERIAL_SUPPORT_LINE_STATUS
chan->status_callback = NULL;
#endif
#ifdef CYGDBG_USE_ASSERTS
#if CYGINT_IO_SERIAL_BLOCK_TRANSFER
chan->in_cbuf.block_mode_xfer_running = false;
chan->out_cbuf.block_mode_xfer_running = false;
#endif // CYGINT_IO_SERIAL_BLOCK_TRANSFER
#endif // CYGDBG_USE_ASSERTS
#ifdef CYGPKG_NET_BLUEZ_STACK
//diag_printf("sizeof(serial_channel) = %d cbuf_t %d\n", sizeof(serial_channel), sizeof(cbuf_t));
//diag_printf("chan->in_cbuf.data=%x,in_cbuf.len=%x,chan->out_cbuf.data=%x\n",chan->in_cbuf.data,chan->in_cbuf.len,chan->out_cbuf.data);
chan->receive = 0;//clyu
chan->tty_ldisc = NULL;
#endif
chan->init = true;
}
/* Initialise the resolver. Open a socket and bind it to the address
of the server. return -1 if something goes wrong, otherwise 0 */
int
redboot_dns_res_init(void)
{
#ifdef CYGPKG_REDBOOT_NETWORKING_DNS_FCONFIG_DOMAIN
char *dns_domain = NULL;
#endif
memset((char *)&server, 0, sizeof(server));
server.sin_len = sizeof(server);
server.sin_family = AF_INET;
server.sin_port = htons(DOMAIN_PORT);
cyg_drv_mutex_init(&dns_mutex);
/* Set the default DNS domain first, so that it can be overwritten
latter */
#ifdef CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN
setdomainname(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN),
strlen(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_DEFAULT_DOMAIN)));
#endif
/* Set the domain name from flash so that DHCP can later
overwrite it. */
#ifdef CYGPKG_REDBOOT_NETWORKING_DNS_FCONFIG_DOMAIN
flash_get_config("dns_domain", &dns_domain, CONFIG_STRING);
if(dns_domain != NULL && dns_domain[0] != '\0')
setdomainname(dns_domain, strlen(dns_domain));
#endif
/* If we got a DNS server address from the DHCP/BOOTP, then use
that address */
if ( __bootp_dns_set ) {
memcpy(&server.sin_addr, &__bootp_dns_addr,
sizeof(__bootp_dns_addr) );
#ifdef CYGPKG_REDBOOT_NETWORKING_DNS_DHCP_DOMAIN
if(__bootp_dns_domain_set)
setdomainname(__bootp_dns_domain, strlen(__bootp_dns_domain));
#endif
/* server config is valid */
s = 0;
}
else {
#ifdef CYGSEM_REDBOOT_FLASH_CONFIG
{
ip_addr_t dns_ip;
flash_get_config("dns_ip", &dns_ip, CONFIG_IP);
if (dns_ip[0] == 0 && dns_ip[1] == 0 &&
dns_ip[2] == 0 && dns_ip[3] == 0)
return -1;
memcpy(&server.sin_addr, &dns_ip, sizeof(dns_ip));
/* server config is valid */
s = 0;
}
#else
// Use static configuration. If CYGPKG_REDBOOT_NETWORKING_DNS_IP
// is valid s will set set as a side effect.
set_dns(__Xstr(CYGPKG_REDBOOT_NETWORKING_DNS_IP));
#endif
}
return 0;
}
/**
*
* QSPI bus initialization function
*
* @param qspi_bus - Driver handle
*
* @return none
*
*****************************************************************************/
static void qspi_xc7z_init_bus(cyg_qspi_xc7z_bus_t * qspi_bus)
{
entry_debug();
volatile cyg_uint32 reg;
// Create and attach SPI interrupt object
cyg_drv_interrupt_create(qspi_bus->interrupt_number,
4,
(cyg_addrword_t)qspi_bus,
qspi_xc7z_ISR,
qspi_xc7z_DSR,
&qspi_bus->qspi_interrupt_handle,
&qspi_bus->qspi_interrupt);
cyg_drv_interrupt_attach(qspi_bus->qspi_interrupt_handle);
cyg_drv_interrupt_mask(qspi_bus->interrupt_number);
// Init transfer mutex and condition
cyg_drv_mutex_init(&qspi_bus->transfer_mx);
cyg_drv_cond_init(&qspi_bus->transfer_cond,
&qspi_bus->transfer_mx);
// Init flags
qspi_bus->transfer_end = true;
qspi_bus->cs_up = false;
// Unlock SLCR regs
HAL_WRITE_UINT32(XC7Z_SYS_CTRL_BASEADDR + XSLCR_UNLOCK_OFFSET, XSLCR_UNLOCK_KEY);
// Enable clock to QSPI module
HAL_READ_UINT32( XC7Z_SYS_CTRL_BASEADDR + XSLCRAPER_CLK_CTRL_OFFSET, reg);
reg |= XSLCRAPER_CLK_CTRL_QSPI_EN;
HAL_WRITE_UINT32(XC7Z_SYS_CTRL_BASEADDR + XSLCRAPER_CLK_CTRL_OFFSET, reg);
// Lock SLCR regs
HAL_WRITE_UINT32(XC7Z_SYS_CTRL_BASEADDR + XSLCR_LOCK_OFFSET, XSLCR_LOCK_KEY);
// Soft reset the SPI controller
HAL_WRITE_UINT32(qspi_bus->base + XQSPIPS_ER_OFFSET, 0x00);
//TODO changed, originally was just setting a value without reading
HAL_READ_UINT32(qspi_bus->base + XQSPIPS_CR_OFFSET, reg);
reg &= (1 << 17); // preserve the reserved bit which is described as "do not modify"
reg |= (1 << 31);
HAL_WRITE_UINT32(qspi_bus->base + XQSPIPS_CR_OFFSET, reg);
// Disable linear mode
HAL_WRITE_UINT32(qspi_bus->base + XQSPIPS_LQSPI_CR_OFFSET, 0x00);
// Clear status
HAL_WRITE_UINT32(qspi_bus->base + XQSPIPS_SR_OFFSET, 0x7F);
// Clear the RX FIFO
HAL_READ_UINT32(qspi_bus->base + XQSPIPS_SR_OFFSET, reg);
while (reg & XQSPIPS_IXR_RXNEMPTY_MASK)
{
HAL_READ_UINT32(qspi_bus->base + XQSPIPS_RXD_OFFSET, reg);
HAL_READ_UINT32(qspi_bus->base + XQSPIPS_SR_OFFSET, reg);
}
HAL_READ_UINT32(qspi_bus->base + XQSPIPS_CR_OFFSET, reg);
reg &= 0xFBFFFFFF; /* Set little endian mode of TX FIFO */
reg |= (XQSPIPS_CR_IFMODE_MASK | XQSPIPS_CR_MANSTRTEN_MASK | XQSPIPS_CR_SSFORCE_MASK |
XQSPIPS_CR_SSCTRL_MASK | XQSPIPS_CR_DATA_SZ_MASK | XQSPIPS_CR_MSTREN_MASK);
HAL_WRITE_UINT32(qspi_bus->base + XQSPIPS_CR_OFFSET, reg);
// Configure SPI pins
// All pins was configured in HAL
// Call upper layer bus init
CYG_SPI_BUS_COMMON_INIT(&qspi_bus->qspi_bus);
}
static void dspi_bus_setup(cyg_spi_freescale_dspi_bus_t* spi_bus_p)
{
cyghwr_devs_freescale_dspi_t* dspi_p = spi_bus_p->setup_p->dspi_p;
cyghwr_hal_freescale_dma_set_t* dma_set_p;
cyghwr_hal_freescale_edma_t* edma_p;
cyg_uint32 dma_chan_i;
// Get the clock frequency from HAL.
spi_bus_p->clock_freq = CYGHWR_IO_SPI_FREESCALE_DSPI_CLOCK;
DEBUG1_PRINTF("DSPI BUS %p: SysClk=%d\n", spi_bus_p, spi_bus_p->clock_freq);
// Set up the pins.
dspi_pin_setup(spi_bus_p->setup_p->spi_pin_list_p,
spi_bus_p->setup_p->cs_pin_list_p,
spi_bus_p->setup_p->cs_pin_num);
// Set up default SPI configuration.
dspi_p->mcr = spi_bus_p->setup_p->mcr_opt | FREESCALE_DSPI_MCR_MSTR_M |
FREESCALE_DSPI_MCR_CLR_RXF_M | FREESCALE_DSPI_MCR_CLR_TXF_M |
FREESCALE_DSPI_MCR_MDIS_M;
// Enable DSPI controller.
dspi_enable(dspi_p);
if((dma_set_p=spi_bus_p->setup_p->dma_set_p)) {
// Initialize DMA channels
hal_freescale_edma_init_chanset(dma_set_p);
#if DEBUG_SPI >= 1
hal_freescale_edma_diag(dma_set_p, 0xffff);
cyghwr_devs_freescale_dspi_diag(spi_bus_p);
#endif
// Set up DMA transfer control descriptors
edma_p = dma_set_p->edma_p;
dma_chan_i = dma_set_p->chan_p[SPI_DMA_CHAN_TX_I].dma_chan_i;
hal_freescale_edma_transfer_init(edma_p, dma_chan_i,
spi_bus_p->tx_dma_tcd_ini_p);
#if DEBUG_SPI >= 1
hal_freescale_edma_transfer_diag(edma_p, dma_chan_i, true);
#endif
dma_chan_i = dma_set_p->chan_p[SPI_DMA_CHAN_RX_I].dma_chan_i;
hal_freescale_edma_transfer_init(edma_p, dma_chan_i,
spi_bus_p->rx_dma_tcd_ini_p);
#if DEBUG_SPI >= 1
hal_freescale_edma_transfer_diag(edma_p, dma_chan_i, true);
#endif
// Enable SPI DMA requests
dspi_p->rser = FREESCALE_DSPI_RSER_TFFF_DIRS_M |
FREESCALE_DSPI_RSER_RFDF_DIRS_M |
FREESCALE_DSPI_RSER_TFFF_RE_M |
FREESCALE_DSPI_RSER_RFDF_RE_M;
}
#if DEBUG_SPI >= 1
cyghwr_devs_freescale_dspi_diag(spi_bus_p);
#endif
// Initialise the synchronisation primitivies.
cyg_drv_mutex_init (&spi_bus_p->transfer_mutex);
cyg_drv_cond_init (&spi_bus_p->transfer_done, &spi_bus_p->transfer_mutex);
// Hook up the ISR and DSR.
cyg_drv_interrupt_create (spi_bus_p->setup_p->intr_num,
spi_bus_p->setup_p->intr_prio,
(cyg_addrword_t) spi_bus_p,
dma_set_p ? dspi_dma_ISR : dspi_nodma_ISR,
dspi_DSR, &spi_bus_p->intr_handle,
&spi_bus_p->intr_data);
cyg_drv_interrupt_attach (spi_bus_p->intr_handle);
dspi_p->ctar[1] = dspi_calc_ctar(&aux_clocking, spi_bus_p->clock_freq);
// Call upper layer bus init.
CYG_SPI_BUS_COMMON_INIT(&spi_bus_p->spi_bus);
}
/*
* Initialize driver and hardware
*/
void zynq_i2c_init(struct cyg_i2c_bus* bus)
{
cyg_zynq_i2c_extra* extra = (cyg_zynq_i2c_extra*)bus->i2c_extra;
cyg_uint16 div_a, div_b;
cyg_uint16 temp_div_a, temp_div_b;
cyg_uint32 error, last_error;
cyg_uint32 temp;
cyg_uint16 ctrl_reg;
extra->i2c_isr_vector = XI2CPS_ISR_VECT;
extra->i2c_isr_priority = 0;
extra->i2c_hold_flag = 0;
// register ISR
cyg_drv_mutex_init(&extra->i2c_lock);
cyg_drv_cond_init(&extra->i2c_wait, &extra->i2c_lock);
cyg_drv_interrupt_create(extra->i2c_isr_vector,
extra->i2c_isr_priority,
(cyg_addrword_t) extra,
&zynq_i2c_isr,
&zynq_i2c_dsr,
&(extra->i2c_int_handle),
&(extra->i2c_int_data));
cyg_drv_interrupt_attach(extra->i2c_int_handle);
// Calculate values of diva and divb based o the PCLK and FSCL
for(temp_div_a = 0; temp_div_a < 4; temp_div_a++)
{
//calculate div_b for assumed div_a
temp = 22 * extra->i2c_bus_freq * (temp_div_a + 1);
temp_div_b = (CYGPKG_DEVS_I2C_ARM_XC7Z_PCLK / temp) - 1;
//error = assumed_fscl - calculated_fscl
error = extra->i2c_bus_freq - (CYGPKG_DEVS_I2C_ARM_XC7Z_PCLK / (22 * (temp_div_a + 1) * (temp_div_b + 1)));
//don't compare errors for first loop iteration
if(temp_div_a == 0)
{
last_error = error;
div_a = temp_div_a;
div_b = temp_div_b;
}
else if(last_error < error) //save the best divisors values
{
div_a = temp_div_a;
div_b = temp_div_b;
}
}
#ifdef ZYNQ_I2C_DEBUG
DPRINTF("divisors calculated: ");
diag_printf("div_a = %d, div_b = %d\n", div_a, div_b);
#endif
// read actual config
HAL_READ_UINT16(XI2CPS_BASE + XI2CPS_CR_OFFSET, ctrl_reg);
// clear divisor_a and divisor_b fields
ctrl_reg &= ~(0x0000C000 | 0x00003F00);
//set new values of divisor_a and divisor_b
ctrl_reg |= ((div_a << 14) | (div_b << 8));
// write config
HAL_WRITE_UINT16(XI2CPS_BASE + XI2CPS_CR_OFFSET, ctrl_reg);
// enable interrupts
HAL_WRITE_UINT16(XI2CPS_BASE + XI2CPS_IER_OFFSET, XI2CPS_ENABLED_INTR);
// set time-out as long as possible
HAL_WRITE_UINT8(XI2CPS_BASE + XI2CPS_TIME_OUT_OFFSET, 0xFF);
#ifdef ZYNQ_I2C_DEBUG
DPRINTF("init OK\n");
#endif
}
