예제 #1
0
파일: bfin_sir.c 프로젝트: 513855417/linux
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;
}
예제 #2
0
파일: bf6xx-sport.c 프로젝트: 020gzh/linux
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;
}
예제 #3
0
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;
}
예제 #4
0
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;
}
예제 #5
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;
}
예제 #6
0
/*
 * 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;
}
예제 #7
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;
}
예제 #8
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;
}