static int bfin_sir_startup(struct bfin_sir_port *port, struct net_device *dev)
{
#ifdef CONFIG_SIR_BFIN_DMA
dma_addr_t dma_handle;
#endif /* CONFIG_SIR_BFIN_DMA */
if (request_dma(port->rx_dma_channel, "BFIN_UART_RX") < 0) {
dev_warn(&dev->dev, "Unable to attach SIR RX DMA channel\n");
return -EBUSY;
}
if (request_dma(port->tx_dma_channel, "BFIN_UART_TX") < 0) {
dev_warn(&dev->dev, "Unable to attach SIR TX DMA channel\n");
free_dma(port->rx_dma_channel);
return -EBUSY;
}
#ifdef CONFIG_SIR_BFIN_DMA
set_dma_callback(port->rx_dma_channel, bfin_sir_dma_rx_int, dev);
set_dma_callback(port->tx_dma_channel, bfin_sir_dma_tx_int, dev);
port->rx_dma_buf.buf = dma_alloc_coherent(NULL, PAGE_SIZE,
&dma_handle, GFP_DMA);
port->rx_dma_buf.head = 0;
port->rx_dma_buf.tail = 0;
port->rx_dma_nrows = 0;
set_dma_config(port->rx_dma_channel,
set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO,
INTR_ON_ROW, DIMENSION_2D,
DATA_SIZE_8, DMA_SYNC_RESTART));
set_dma_x_count(port->rx_dma_channel, DMA_SIR_RX_XCNT);
set_dma_x_modify(port->rx_dma_channel, 1);
set_dma_y_count(port->rx_dma_channel, DMA_SIR_RX_YCNT);
set_dma_y_modify(port->rx_dma_channel, 1);
set_dma_start_addr(port->rx_dma_channel, (unsigned long)port->rx_dma_buf.buf);
enable_dma(port->rx_dma_channel);
port->rx_dma_timer.data = (unsigned long)(dev);
port->rx_dma_timer.function = (void *)bfin_sir_rx_dma_timeout;
#else
if (request_irq(port->irq, bfin_sir_rx_int, 0, "BFIN_SIR_RX", dev)) {
dev_warn(&dev->dev, "Unable to attach SIR RX interrupt\n");
return -EBUSY;
}
if (request_irq(port->irq+1, bfin_sir_tx_int, 0, "BFIN_SIR_TX", dev)) {
dev_warn(&dev->dev, "Unable to attach SIR TX interrupt\n");
free_irq(port->irq, dev);
return -EBUSY;
}
#endif
return 0;
}
static int sport_request_resource(struct sport_device *sport)
{
struct device *dev = &sport->pdev->dev;
int ret;
ret = peripheral_request_list(sport->pin_req, "soc-audio");
if (ret) {
dev_err(dev, "Unable to request sport pin\n");
return ret;
}
ret = request_dma(sport->tx_dma_chan, "SPORT TX Data");
if (ret) {
dev_err(dev, "Unable to allocate DMA channel for sport tx\n");
goto err_tx_dma;
}
set_dma_callback(sport->tx_dma_chan, sport_tx_irq, sport);
ret = request_dma(sport->rx_dma_chan, "SPORT RX Data");
if (ret) {
dev_err(dev, "Unable to allocate DMA channel for sport rx\n");
goto err_rx_dma;
}
set_dma_callback(sport->rx_dma_chan, sport_rx_irq, sport);
ret = request_irq(sport->tx_err_irq, sport_err_irq,
0, "SPORT TX ERROR", sport);
if (ret) {
dev_err(dev, "Unable to allocate tx error IRQ for sport\n");
goto err_tx_irq;
}
ret = request_irq(sport->rx_err_irq, sport_err_irq,
0, "SPORT RX ERROR", sport);
if (ret) {
dev_err(dev, "Unable to allocate rx error IRQ for sport\n");
goto err_rx_irq;
}
return 0;
err_rx_irq:
free_irq(sport->tx_err_irq, sport);
err_tx_irq:
free_dma(sport->rx_dma_chan);
err_rx_dma:
free_dma(sport->tx_dma_chan);
err_tx_dma:
peripheral_free_list(sport->pin_req);
return ret;
}
int __init bf561_coreb_init(void)
{
struct proc_dir_entry *proc_entry;
init_waitqueue_head(&coreb_dma_wait);
/* Request the core memory regions for Core B */
if (request_mem_region(0xff600000, 0x4000,
"Core B - Instruction SRAM") == NULL)
goto exit;
if (request_mem_region(0xFF610000, 0x4000,
"Core B - Instruction SRAM") == NULL)
goto release_instruction_a_sram;
if (request_mem_region(0xFF500000, 0x8000,
"Core B - Data Bank B SRAM") == NULL)
goto release_instruction_b_sram;
if (request_mem_region(0xff400000, 0x8000,
"Core B - Data Bank A SRAM") == NULL)
goto release_data_b_sram;
if (request_dma(CH_MEM_STREAM2_DEST, "Core B - DMA Destination") < 0)
goto release_data_a_sram;
if (request_dma(CH_MEM_STREAM2_SRC, "Core B - DMA Source") < 0)
goto release_dma_dest;
set_dma_callback(CH_MEM_STREAM2_DEST, coreb_dma_interrupt, NULL);
misc_register(&coreb_dev);
printk(KERN_INFO "Core B: Initializing /proc\n");
coreb_proc_entry = create_proc_entry("coreb", 0, NULL);
if (coreb_proc_entry)
{
coreb_proc_entry->owner = THIS_MODULE;
coreb_proc_entry->read_proc = coreb_read_status;
} else {
printk(KERN_ERR "Core B: Unable to register /proc/coreb\n");
goto release_dma_src;
}
printk(KERN_INFO "BF561 Core B driver %s initialized.\n", MODULE_VER);
return 0;
release_dma_src:
free_dma(CH_MEM_STREAM2_SRC);
release_dma_dest:
free_dma(CH_MEM_STREAM2_DEST);
release_data_a_sram:
release_mem_region(0xff400000, 0x8000);
release_data_b_sram:
release_mem_region(0xff500000, 0x8000);
release_instruction_b_sram:
release_mem_region(0xff610000, 0x4000);
release_instruction_a_sram:
release_mem_region(0xff600000, 0x4000);
exit:
return -ENOMEM;
}
static int dma_init(void) {
int ret;
/* Request DMA channel */
ret = request_dma(CH_PPI, DRIVER_NAME);
if(ret < 0) {
printk(KERN_WARNING DRIVER_NAME ": Could not allocate DMA channel\n");
return ret;
}
/* Disable channel while it is being configured */
disable_dma(CH_PPI);
/* Allocate buffer space for the DMA engine to use */
dma_buffer = __get_dma_pages(GFP_KERNEL, page_alloc_order(BUFFER_SIZE * BUFFER_COUNT));
if(dma_buffer == 0) {
printk(KERN_WARNING DRIVER_NAME ": Could not allocate dma_pages\n");
free_dma(CH_PPI);
return -ENOMEM;
}
/* Invalid caching on the DMA buffer */
invalidate_dcache_range(dma_buffer, dma_buffer + (BUFFER_SIZE * BUFFER_COUNT));
/* Set DMA configuration */
set_dma_start_addr(CH_PPI, dma_buffer);
set_dma_config(CH_PPI, (DMAFLOW_AUTO | WNR | RESTART | DI_EN | WDSIZE_16 | DMA2D | DI_SEL));
set_dma_x_count(CH_PPI, SAMPLES_PER_BUFFER * CHANNELS);
set_dma_x_modify(CH_PPI, SAMPLE_SIZE);
set_dma_y_count(CH_PPI, BUFFER_COUNT);
set_dma_y_modify(CH_PPI, SAMPLE_SIZE);
set_dma_callback(CH_PPI, &buffer_full_handler, NULL);
return 0;
}
static int ppi_attach_irq(struct ppi_if *ppi, irq_handler_t handler)
{
const struct ppi_info *info = ppi->info;
int ret;
ret = request_dma(info->dma_ch, "PPI_DMA");
if (ret) {
pr_err("Unable to allocate DMA channel for PPI\n");
return ret;
}
set_dma_callback(info->dma_ch, handler, ppi);
if (ppi->err_int) {
ret = request_irq(info->irq_err, ppi_irq_err, 0, "PPI ERROR", ppi);
if (ret) {
pr_err("Unable to allocate IRQ for PPI\n");
free_dma(info->dma_ch);
}
}
return ret;
}
/*
* FUNCTION NAME: ppi_open
*
* INPUTS/OUTPUTS:
* in_inode - Description of openned file.
* in_filp - Description of openned file.
*
* RETURN
* 0: Open ok.
* -ENXIO No such device
*
* FUNCTION(S) CALLED:
*
* GLOBAL VARIABLES REFERENCED: ppiinfo
*
* GLOBAL VARIABLES MODIFIED: NIL
*
* DESCRIPTION: It is invoked when user call 'open' system call
* to open ppi device.
*
* CAUTION:
*/
static int ppi_open(struct inode *inode, struct file *filp)
{
char intname[20];
unsigned long flags;
int minor = MINOR(inode->i_rdev);
pr_debug("ppi_open:\n");
/* PPI ? */
if (minor != PPI0_MINOR)
return -ENXIO;
spin_lock_irqsave(&ppifcd_lock, flags);
if (ppiinfo.opened) {
spin_unlock_irqrestore(&ppifcd_lock, flags);
return -EMFILE;
}
/* Clear configuration information */
memset(&ppiinfo, 0, sizeof(ppi_device_t));
if (filp->f_flags & O_NONBLOCK)
ppiinfo.nonblock = 1;
ppiinfo.opened = 1;
ppiinfo.done = 0;
ppiinfo.dma_config =
(DMA_FLOW_MODE | WNR | RESTART | DMA_WDSIZE_16 | DMA2D | DI_EN);
ppiinfo.pixel_per_line = PIXEL_PER_LINE;
ppiinfo.lines_per_frame = LINES_PER_FRAME;
ppiinfo.bpp = 8;
ppiinfo.ppi_control =
POL_S | POL_C | PPI_DATA_LEN | PPI_PACKING | CFG_GP_Input_3Syncs |
GP_Input_Mode;
ppiinfo.ppi_status = 0;
ppiinfo.ppi_delay = 0;
ppiinfo.ppi_trigger_gpio = NO_TRIGGER;
ppiinfo.rx_avail = &ppirxq0;
strcpy(intname, PPI_INTNAME);
ppiinfo.irqnum = IRQ_PPI;
filp->private_data = &ppiinfo;
ppifcd_reg_reset(filp->private_data);
/* Request DMA channel, and pass the interrupt handler */
if (request_dma(CH_PPI, "BF533_PPI_DMA") < 0) {
panic("Unable to attach BlackFin PPI DMA channel\n");
ppiinfo.opened = 0;
spin_unlock_irqrestore(&ppifcd_lock, flags);
return -EFAULT;
} else
set_dma_callback(CH_PPI, (void *)ppifcd_irq,
filp->private_data);
request_irq(IRQ_PPI_ERROR, (void *)ppifcd_irq_error, IRQF_DISABLED,
"PPI ERROR", filp->private_data);
spin_unlock_irqrestore(&ppifcd_lock, flags);
pr_debug("ppi_open: return\n");
return 0;
}
static int bfin_serial_startup(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
#ifdef CONFIG_SERIAL_BFIN_DMA
dma_addr_t dma_handle;
if (request_dma(uart->rx_dma_channel, "BFIN_UART_RX") < 0) {
printk(KERN_NOTICE "Unable to attach Blackfin UART RX DMA channel\n");
return -EBUSY;
}
if (request_dma(uart->tx_dma_channel, "BFIN_UART_TX") < 0) {
printk(KERN_NOTICE "Unable to attach Blackfin UART TX DMA channel\n");
free_dma(uart->rx_dma_channel);
return -EBUSY;
}
set_dma_callback(uart->rx_dma_channel, bfin_serial_dma_rx_int, uart);
set_dma_callback(uart->tx_dma_channel, bfin_serial_dma_tx_int, uart);
uart->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA);
uart->rx_dma_buf.head = 0;
uart->rx_dma_buf.tail = 0;
uart->rx_dma_nrows = 0;
set_dma_config(uart->rx_dma_channel,
set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO,
INTR_ON_ROW, DIMENSION_2D,
DATA_SIZE_8,
DMA_SYNC_RESTART));
set_dma_x_count(uart->rx_dma_channel, DMA_RX_XCOUNT);
set_dma_x_modify(uart->rx_dma_channel, 1);
set_dma_y_count(uart->rx_dma_channel, DMA_RX_YCOUNT);
set_dma_y_modify(uart->rx_dma_channel, 1);
set_dma_start_addr(uart->rx_dma_channel, (unsigned long)uart->rx_dma_buf.buf);
enable_dma(uart->rx_dma_channel);
uart->rx_dma_timer.data = (unsigned long)(uart);
uart->rx_dma_timer.function = (void *)bfin_serial_rx_dma_timeout;
uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES;
add_timer(&(uart->rx_dma_timer));
#else
#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
if (kgdboc_port_line == uart->port.line && kgdboc_break_enabled)
kgdboc_break_enabled = 0;
else {
# endif
if (request_irq(uart->port.irq, bfin_serial_rx_int, IRQF_DISABLED,
"BFIN_UART_RX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART RX interrupt\n");
return -EBUSY;
}
if (request_irq
(uart->port.irq+1, bfin_serial_tx_int, IRQF_DISABLED,
"BFIN_UART_TX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART TX interrupt\n");
free_irq(uart->port.irq, uart);
return -EBUSY;
}
# ifdef CONFIG_BF54x
{
unsigned uart_dma_ch_rx, uart_dma_ch_tx;
switch (uart->port.irq) {
case IRQ_UART3_RX:
uart_dma_ch_rx = CH_UART3_RX;
uart_dma_ch_tx = CH_UART3_TX;
break;
case IRQ_UART2_RX:
uart_dma_ch_rx = CH_UART2_RX;
uart_dma_ch_tx = CH_UART2_TX;
break;
default:
uart_dma_ch_rx = uart_dma_ch_tx = 0;
break;
};
if (uart_dma_ch_rx &&
request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) {
printk(KERN_NOTICE"Fail to attach UART interrupt\n");
free_irq(uart->port.irq, uart);
free_irq(uart->port.irq + 1, uart);
return -EBUSY;
}
if (uart_dma_ch_tx &&
request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) {
printk(KERN_NOTICE "Fail to attach UART interrupt\n");
free_dma(uart_dma_ch_rx);
free_irq(uart->port.irq, uart);
free_irq(uart->port.irq + 1, uart);
return -EBUSY;
}
}
# endif
#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
}
# endif
#endif
UART_SET_IER(uart, ERBFI);
return 0;
}
static int bfin_serial_startup(struct uart_port *port)
{
struct bfin_serial_port *uart = (struct bfin_serial_port *)port;
#ifdef CONFIG_SERIAL_BFIN_DMA
dma_addr_t dma_handle;
if (request_dma(uart->rx_dma_channel, "BFIN_UART_RX") < 0) {
printk(KERN_NOTICE "Unable to attach Blackfin UART RX DMA channel\n");
return -EBUSY;
}
if (request_dma(uart->tx_dma_channel, "BFIN_UART_TX") < 0) {
printk(KERN_NOTICE "Unable to attach Blackfin UART TX DMA channel\n");
free_dma(uart->rx_dma_channel);
return -EBUSY;
}
set_dma_callback(uart->rx_dma_channel, bfin_serial_dma_rx_int, uart);
set_dma_callback(uart->tx_dma_channel, bfin_serial_dma_tx_int, uart);
uart->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA);
uart->rx_dma_buf.head = 0;
uart->rx_dma_buf.tail = 0;
uart->rx_dma_nrows = 0;
set_dma_config(uart->rx_dma_channel,
set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO,
INTR_ON_ROW, DIMENSION_2D,
DATA_SIZE_8,
DMA_SYNC_RESTART));
set_dma_x_count(uart->rx_dma_channel, DMA_RX_XCOUNT);
set_dma_x_modify(uart->rx_dma_channel, 1);
set_dma_y_count(uart->rx_dma_channel, DMA_RX_YCOUNT);
set_dma_y_modify(uart->rx_dma_channel, 1);
set_dma_start_addr(uart->rx_dma_channel, (unsigned long)uart->rx_dma_buf.buf);
enable_dma(uart->rx_dma_channel);
uart->rx_dma_timer.data = (unsigned long)(uart);
uart->rx_dma_timer.function = (void *)bfin_serial_rx_dma_timeout;
uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES;
add_timer(&(uart->rx_dma_timer));
#else
# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
if (kgdboc_port_line == uart->port.line && kgdboc_break_enabled)
kgdboc_break_enabled = 0;
else {
# endif
if (request_irq(uart->port.irq, bfin_serial_rx_int, IRQF_DISABLED,
"BFIN_UART_RX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART RX interrupt\n");
return -EBUSY;
}
if (request_irq
(uart->port.irq+1, bfin_serial_tx_int, IRQF_DISABLED,
"BFIN_UART_TX", uart)) {
printk(KERN_NOTICE "Unable to attach BlackFin UART TX interrupt\n");
free_irq(uart->port.irq, uart);
return -EBUSY;
}
# ifdef CONFIG_BF54x
{
/*
* UART2 and UART3 on BF548 share interrupt PINs and DMA
* controllers with SPORT2 and SPORT3. UART rx and tx
* interrupts are generated in PIO mode only when configure
* their peripheral mapping registers properly, which means
* request corresponding DMA channels in PIO mode as well.
*/
unsigned uart_dma_ch_rx, uart_dma_ch_tx;
switch (uart->port.irq) {
case IRQ_UART3_RX:
uart_dma_ch_rx = CH_UART3_RX;
uart_dma_ch_tx = CH_UART3_TX;
break;
case IRQ_UART2_RX:
uart_dma_ch_rx = CH_UART2_RX;
uart_dma_ch_tx = CH_UART2_TX;
break;
default:
uart_dma_ch_rx = uart_dma_ch_tx = 0;
break;
};
if (uart_dma_ch_rx &&
request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) {
printk(KERN_NOTICE"Fail to attach UART interrupt\n");
free_irq(uart->port.irq, uart);
free_irq(uart->port.irq + 1, uart);
return -EBUSY;
}
if (uart_dma_ch_tx &&
request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) {
printk(KERN_NOTICE "Fail to attach UART interrupt\n");
free_dma(uart_dma_ch_rx);
free_irq(uart->port.irq, uart);
free_irq(uart->port.irq + 1, uart);
return -EBUSY;
}
}
# endif
# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \
defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE)
}
# endif
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
if (uart->cts_pin >= 0) {
if (request_irq(gpio_to_irq(uart->cts_pin),
bfin_serial_mctrl_cts_int,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
IRQF_DISABLED, "BFIN_UART_CTS", uart)) {
uart->cts_pin = -1;
pr_info("Unable to attach BlackFin UART CTS interrupt. So, disable it.\n");
}
}
if (uart->rts_pin >= 0) {
gpio_direction_output(uart->rts_pin, 0);
}
#endif
#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS
if (uart->cts_pin >= 0 && request_irq(uart->status_irq,
bfin_serial_mctrl_cts_int,
IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) {
uart->cts_pin = -1;
pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n");
}
/* CTS RTS PINs are negative assertive. */
UART_PUT_MCR(uart, ACTS);
UART_SET_IER(uart, EDSSI);
#endif
UART_SET_IER(uart, ERBFI);
return 0;
}
