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Commit 9f25bc51 authored by Russell King's avatar Russell King Committed by Greg Kroah-Hartman
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tty: amba-pl011: prepare REG_* register indexes 



Prepare for REG_* register accessors.  This change involves introducing
pl011_reg_to_offset() to convert REG_* to the hardware register offset,
and converting all call sites to use REG_* names.  We need to fix up
locations where we check for equivalence of register offsets as well.

Much of this change was made via these sed expressions:
s/ST_UART01[1x]\(_[^_]*\|_LCRH_[TR]X\)\>/REG_ST\1/
s/UART01[1x]_\(DR\|RSR\|ECR\|FR\|ILPR\|[IF]BRD\|LCRH\|CR\|IFLS\|IMSC\|RIS\|MIS\|ICR\|DMACR\)\>/REG_\1/g

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7fe9a5a9

drivers/tty/serial/amba-pl011.c

+108 −97
Original line number Diff line number Diff line
@@ -60,6 +60,8 @@ 
#include <linux/io.h>

#include <linux/acpi.h>



#include "amba-pl011.h"



#define UART_NR			14



#define SERIAL_AMBA_MAJOR	204
@@ -92,8 +94,8 @@ static unsigned int get_fifosize_arm(struct amba_device *dev) 


static struct vendor_data vendor_arm = {

	.ifls			= UART011_IFLS_RX4_8|UART011_IFLS_TX4_8,

	.lcrh_tx		= UART011_LCRH,

	.lcrh_rx		= UART011_LCRH,

	.lcrh_tx		= REG_LCRH,

	.lcrh_rx		= REG_LCRH,

	.oversampling		= false,

	.dma_threshold		= false,

	.cts_event_workaround	= false,
@@ -117,8 +119,8 @@ static unsigned int get_fifosize_st(struct amba_device *dev) 


static struct vendor_data vendor_st = {

	.ifls			= UART011_IFLS_RX_HALF|UART011_IFLS_TX_HALF,

	.lcrh_tx		= ST_UART011_LCRH_TX,

	.lcrh_rx		= ST_UART011_LCRH_RX,

	.lcrh_tx		= REG_ST_LCRH_TX,

	.lcrh_rx		= REG_ST_LCRH_RX,

	.oversampling		= true,

	.dma_threshold		= true,

	.cts_event_workaround	= true,
@@ -184,16 +186,22 @@ struct uart_amba_port { 
#endif

};



static unsigned int pl011_reg_to_offset(const struct uart_amba_port *uap,

	unsigned int reg)

{

	return reg;

}



static unsigned int pl011_read(const struct uart_amba_port *uap,

	unsigned int reg)

{

	return readw(uap->port.membase + reg);

	return readw(uap->port.membase + pl011_reg_to_offset(uap, reg));

}



static void pl011_write(unsigned int val, const struct uart_amba_port *uap,

	unsigned int reg)

{

	writew(val, uap->port.membase + reg);

	writew(val, uap->port.membase + pl011_reg_to_offset(uap, reg));

}



/*
@@ -208,12 +216,12 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap) 
	int fifotaken = 0;



	while (max_count--) {

		status = pl011_read(uap, UART01x_FR);

		status = pl011_read(uap, REG_FR);

		if (status & UART01x_FR_RXFE)

			break;



		/* Take chars from the FIFO and update status */

		ch = pl011_read(uap, UART01x_DR) | UART_DUMMY_DR_RX;

		ch = pl011_read(uap, REG_DR) | UART_DUMMY_DR_RX;

		flag = TTY_NORMAL;

		uap->port.icount.rx++;

		fifotaken++;
@@ -295,7 +303,8 @@ static void pl011_dma_probe(struct uart_amba_port *uap) 
	struct amba_pl011_data *plat = dev_get_platdata(uap->port.dev);

	struct device *dev = uap->port.dev;

	struct dma_slave_config tx_conf = {

		.dst_addr = uap->port.mapbase + UART01x_DR,

		.dst_addr = uap->port.mapbase +

				 pl011_reg_to_offset(uap, REG_DR),

		.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,

		.direction = DMA_MEM_TO_DEV,

		.dst_maxburst = uap->fifosize >> 1,
@@ -350,7 +359,8 @@ static void pl011_dma_probe(struct uart_amba_port *uap) 


	if (chan) {

		struct dma_slave_config rx_conf = {

			.src_addr = uap->port.mapbase + UART01x_DR,

			.src_addr = uap->port.mapbase +

				pl011_reg_to_offset(uap, REG_DR),

			.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE,

			.direction = DMA_DEV_TO_MEM,

			.src_maxburst = uap->fifosize >> 2,
@@ -449,7 +459,7 @@ static void pl011_dma_tx_callback(void *data) 


	dmacr = uap->dmacr;

	uap->dmacr = dmacr & ~UART011_TXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);



	/*

	 * If TX DMA was disabled, it means that we've stopped the DMA for
@@ -563,7 +573,7 @@ static int pl011_dma_tx_refill(struct uart_amba_port *uap) 
	dma_dev->device_issue_pending(chan);



	uap->dmacr |= UART011_TXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);

	uap->dmatx.queued = true;



	/*
@@ -599,9 +609,9 @@ static bool pl011_dma_tx_irq(struct uart_amba_port *uap) 
	 */

	if (uap->dmatx.queued) {

		uap->dmacr |= UART011_TXDMAE;

		pl011_write(uap->dmacr, uap, UART011_DMACR);

		pl011_write(uap->dmacr, uap, REG_DMACR);

		uap->im &= ~UART011_TXIM;

		pl011_write(uap->im, uap, UART011_IMSC);

		pl011_write(uap->im, uap, REG_IMSC);

		return true;

	}
@@ -611,7 +621,7 @@ static bool pl011_dma_tx_irq(struct uart_amba_port *uap) 
	 */

	if (pl011_dma_tx_refill(uap) > 0) {

		uap->im &= ~UART011_TXIM;

		pl011_write(uap->im, uap, UART011_IMSC);

		pl011_write(uap->im, uap, REG_IMSC);

		return true;

	}

	return false;
@@ -625,7 +635,7 @@ static inline void pl011_dma_tx_stop(struct uart_amba_port *uap) 
{

	if (uap->dmatx.queued) {

		uap->dmacr &= ~UART011_TXDMAE;

		pl011_write(uap->dmacr, uap, UART011_DMACR);

		pl011_write(uap->dmacr, uap, REG_DMACR);

	}

}
@@ -651,12 +661,12 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) 
		if (!uap->dmatx.queued) {

			if (pl011_dma_tx_refill(uap) > 0) {

				uap->im &= ~UART011_TXIM;

				pl011_write(uap->im, uap, UART011_IMSC);

				pl011_write(uap->im, uap, REG_IMSC);

			} else

				ret = false;

		} else if (!(uap->dmacr & UART011_TXDMAE)) {

			uap->dmacr |= UART011_TXDMAE;

			pl011_write(uap->dmacr, uap, UART011_DMACR);

			pl011_write(uap->dmacr, uap, REG_DMACR);

		}

		return ret;

	}
@@ -667,9 +677,9 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) 
	 */

	dmacr = uap->dmacr;

	uap->dmacr &= ~UART011_TXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);



	if (pl011_read(uap, UART01x_FR) & UART01x_FR_TXFF) {

	if (pl011_read(uap, REG_FR) & UART01x_FR_TXFF) {

		/*

		 * No space in the FIFO, so enable the transmit interrupt

		 * so we know when there is space.  Note that once we've
@@ -678,13 +688,13 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) 
		return false;

	}



	pl011_write(uap->port.x_char, uap, UART01x_DR);

	pl011_write(uap->port.x_char, uap, REG_DR);

	uap->port.icount.tx++;

	uap->port.x_char = 0;



	/* Success - restore the DMA state */

	uap->dmacr = dmacr;

	pl011_write(dmacr, uap, UART011_DMACR);

	pl011_write(dmacr, uap, REG_DMACR);



	return true;

}
@@ -712,7 +722,7 @@ __acquires(&uap->port.lock) 
			     DMA_TO_DEVICE);

		uap->dmatx.queued = false;

		uap->dmacr &= ~UART011_TXDMAE;

		pl011_write(uap->dmacr, uap, UART011_DMACR);

		pl011_write(uap->dmacr, uap, REG_DMACR);

	}

}
@@ -752,11 +762,11 @@ static int pl011_dma_rx_trigger_dma(struct uart_amba_port *uap) 
	dma_async_issue_pending(rxchan);



	uap->dmacr |= UART011_RXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);

	uap->dmarx.running = true;



	uap->im &= ~UART011_RXIM;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);



	return 0;

}
@@ -815,7 +825,7 @@ static void pl011_dma_rx_chars(struct uart_amba_port *uap, 
	if (dma_count == pending && readfifo) {

		/* Clear any error flags */

		pl011_write(UART011_OEIS | UART011_BEIS | UART011_PEIS |

			    UART011_FEIS, uap, UART011_ICR);

			    UART011_FEIS, uap, REG_ICR);



		/*

		 * If we read all the DMA'd characters, and we had an
@@ -863,7 +873,7 @@ static void pl011_dma_rx_irq(struct uart_amba_port *uap) 


	/* Disable RX DMA - incoming data will wait in the FIFO */

	uap->dmacr &= ~UART011_RXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);

	uap->dmarx.running = false;



	pending = sgbuf->sg.length - state.residue;
@@ -883,7 +893,7 @@ static void pl011_dma_rx_irq(struct uart_amba_port *uap) 
		dev_dbg(uap->port.dev, "could not retrigger RX DMA job "

			"fall back to interrupt mode\n");

		uap->im |= UART011_RXIM;

		pl011_write(uap->im, uap, UART011_IMSC);

		pl011_write(uap->im, uap, REG_IMSC);

	}

}
@@ -931,7 +941,7 @@ static void pl011_dma_rx_callback(void *data) 
		dev_dbg(uap->port.dev, "could not retrigger RX DMA job "

			"fall back to interrupt mode\n");

		uap->im |= UART011_RXIM;

		pl011_write(uap->im, uap, UART011_IMSC);

		pl011_write(uap->im, uap, REG_IMSC);

	}

}
@@ -944,7 +954,7 @@ static inline void pl011_dma_rx_stop(struct uart_amba_port *uap) 
{

	/* FIXME.  Just disable the DMA enable */

	uap->dmacr &= ~UART011_RXDMAE;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);

}



/*
@@ -988,7 +998,7 @@ static void pl011_dma_rx_poll(unsigned long args) 
		spin_lock_irqsave(&uap->port.lock, flags);

		pl011_dma_rx_stop(uap);

		uap->im |= UART011_RXIM;

		pl011_write(uap->im, uap, UART011_IMSC);

		pl011_write(uap->im, uap, REG_IMSC);

		spin_unlock_irqrestore(&uap->port.lock, flags);



		uap->dmarx.running = false;
@@ -1050,7 +1060,7 @@ static void pl011_dma_startup(struct uart_amba_port *uap) 
skip_rx:

	/* Turn on DMA error (RX/TX will be enabled on demand) */

	uap->dmacr |= UART011_DMAONERR;

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);



	/*

	 * ST Micro variants has some specific dma burst threshold
@@ -1059,7 +1069,7 @@ static void pl011_dma_startup(struct uart_amba_port *uap) 
	 */

	if (uap->vendor->dma_threshold)

		pl011_write(ST_UART011_DMAWM_RX_16 | ST_UART011_DMAWM_TX_16,

			    uap, ST_UART011_DMAWM);

			    uap, REG_ST_DMAWM);



	if (uap->using_rx_dma) {

		if (pl011_dma_rx_trigger_dma(uap))
@@ -1084,12 +1094,12 @@ static void pl011_dma_shutdown(struct uart_amba_port *uap) 
		return;



	/* Disable RX and TX DMA */

	while (pl011_read(uap, UART01x_FR) & UART01x_FR_BUSY)

	while (pl011_read(uap, REG_FR) & UART01x_FR_BUSY)

		barrier();



	spin_lock_irq(&uap->port.lock);

	uap->dmacr &= ~(UART011_DMAONERR | UART011_RXDMAE | UART011_TXDMAE);

	pl011_write(uap->dmacr, uap, UART011_DMACR);

	pl011_write(uap->dmacr, uap, REG_DMACR);

	spin_unlock_irq(&uap->port.lock);



	if (uap->using_tx_dma) {
@@ -1190,7 +1200,7 @@ static void pl011_stop_tx(struct uart_port *port) 
	    container_of(port, struct uart_amba_port, port);



	uap->im &= ~UART011_TXIM;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);

	pl011_dma_tx_stop(uap);

}
@@ -1200,7 +1210,7 @@ static void pl011_tx_chars(struct uart_amba_port *uap, bool from_irq); 
static void pl011_start_tx_pio(struct uart_amba_port *uap)

{

	uap->im |= UART011_TXIM;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);

	pl011_tx_chars(uap, false);

}
@@ -1220,7 +1230,7 @@ static void pl011_stop_rx(struct uart_port *port) 


	uap->im &= ~(UART011_RXIM|UART011_RTIM|UART011_FEIM|

		     UART011_PEIM|UART011_BEIM|UART011_OEIM);

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);



	pl011_dma_rx_stop(uap);

}
@@ -1231,7 +1241,7 @@ static void pl011_enable_ms(struct uart_port *port) 
	    container_of(port, struct uart_amba_port, port);



	uap->im |= UART011_RIMIM|UART011_CTSMIM|UART011_DCDMIM|UART011_DSRMIM;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);

}



static void pl011_rx_chars(struct uart_amba_port *uap)
@@ -1251,7 +1261,7 @@ __acquires(&uap->port.lock) 
			dev_dbg(uap->port.dev, "could not trigger RX DMA job "

				"fall back to interrupt mode again\n");

			uap->im |= UART011_RXIM;

			pl011_write(uap->im, uap, UART011_IMSC);

			pl011_write(uap->im, uap, REG_IMSC);

		} else {

#ifdef CONFIG_DMA_ENGINE

			/* Start Rx DMA poll */
@@ -1272,10 +1282,10 @@ static bool pl011_tx_char(struct uart_amba_port *uap, unsigned char c, 
			  bool from_irq)

{

	if (unlikely(!from_irq) &&

	    pl011_read(uap, UART01x_FR) & UART01x_FR_TXFF)

	    pl011_read(uap, REG_FR) & UART01x_FR_TXFF)

		return false; /* unable to transmit character */



	pl011_write(c, uap, UART01x_DR);

	pl011_write(c, uap, REG_DR);

	uap->port.icount.tx++;



	return true;
@@ -1322,7 +1332,7 @@ static void pl011_modem_status(struct uart_amba_port *uap) 
{

	unsigned int status, delta;



	status = pl011_read(uap, UART01x_FR) & UART01x_FR_MODEM_ANY;

	status = pl011_read(uap, REG_FR) & UART01x_FR_MODEM_ANY;



	delta = status ^ uap->old_status;

	uap->old_status = status;
@@ -1350,15 +1360,15 @@ static void check_apply_cts_event_workaround(struct uart_amba_port *uap) 
		return;



	/* workaround to make sure that all bits are unlocked.. */

	pl011_write(0x00, uap, UART011_ICR);

	pl011_write(0x00, uap, REG_ICR);



	/*

	 * WA: introduce 26ns(1 uart clk) delay before W1C;

	 * single apb access will incur 2 pclk(133.12Mhz) delay,

	 * so add 2 dummy reads

	 */

	dummy_read = pl011_read(uap, UART011_ICR);

	dummy_read = pl011_read(uap, UART011_ICR);

	dummy_read = pl011_read(uap, REG_ICR);

	dummy_read = pl011_read(uap, REG_ICR);

}



static irqreturn_t pl011_int(int irq, void *dev_id)
@@ -1370,15 +1380,15 @@ static irqreturn_t pl011_int(int irq, void *dev_id) 
	int handled = 0;



	spin_lock_irqsave(&uap->port.lock, flags);

	imsc = pl011_read(uap, UART011_IMSC);

	status = pl011_read(uap, UART011_RIS) & imsc;

	imsc = pl011_read(uap, REG_IMSC);

	status = pl011_read(uap, REG_RIS) & imsc;

	if (status) {

		do {

			check_apply_cts_event_workaround(uap);



			pl011_write(status & ~(UART011_TXIS|UART011_RTIS|

					       UART011_RXIS),

				    uap, UART011_ICR);

				    uap, REG_ICR);



			if (status & (UART011_RTIS|UART011_RXIS)) {

				if (pl011_dma_rx_running(uap))
@@ -1395,7 +1405,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id) 
			if (pass_counter-- == 0)

				break;



			status = pl011_read(uap, UART011_RIS) & imsc;

			status = pl011_read(uap, REG_RIS) & imsc;

		} while (status != 0);

		handled = 1;

	}
@@ -1409,7 +1419,7 @@ static unsigned int pl011_tx_empty(struct uart_port *port) 
{

	struct uart_amba_port *uap =

	    container_of(port, struct uart_amba_port, port);

	unsigned int status = pl011_read(uap, UART01x_FR);

	unsigned int status = pl011_read(uap, REG_FR);

	return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT;

}
@@ -1418,7 +1428,7 @@ static unsigned int pl011_get_mctrl(struct uart_port *port) 
	struct uart_amba_port *uap =

	    container_of(port, struct uart_amba_port, port);

	unsigned int result = 0;

	unsigned int status = pl011_read(uap, UART01x_FR);

	unsigned int status = pl011_read(uap, REG_FR);



#define TIOCMBIT(uartbit, tiocmbit)	\

	if (status & uartbit)		\
@@ -1438,7 +1448,7 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl) 
	    container_of(port, struct uart_amba_port, port);

	unsigned int cr;



	cr = pl011_read(uap, UART011_CR);

	cr = pl011_read(uap, REG_CR);



#define	TIOCMBIT(tiocmbit, uartbit)		\

	if (mctrl & tiocmbit)		\
@@ -1458,7 +1468,7 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl) 
	}

#undef TIOCMBIT



	pl011_write(cr, uap, UART011_CR);

	pl011_write(cr, uap, REG_CR);

}



static void pl011_break_ctl(struct uart_port *port, int break_state)
@@ -1485,7 +1495,7 @@ static void pl011_quiesce_irqs(struct uart_port *port) 
	struct uart_amba_port *uap =

	    container_of(port, struct uart_amba_port, port);



	pl011_write(pl011_read(uap, UART011_MIS), uap, UART011_ICR);

	pl011_write(pl011_read(uap, REG_MIS), uap, REG_ICR);

	/*

	 * There is no way to clear TXIM as this is "ready to transmit IRQ", so

	 * we simply mask it. start_tx() will unmask it.
@@ -1499,8 +1509,8 @@ static void pl011_quiesce_irqs(struct uart_port *port) 
	 * (including tx queue), so we're also fine with start_tx()'s caller

	 * side.

	 */

	pl011_write(pl011_read(uap, UART011_IMSC) & ~UART011_TXIM, uap,

		    UART011_IMSC);

	pl011_write(pl011_read(uap, REG_IMSC) & ~UART011_TXIM, uap,

		    REG_IMSC);

}



static int pl011_get_poll_char(struct uart_port *port)
@@ -1515,11 +1525,11 @@ static int pl011_get_poll_char(struct uart_port *port) 
	 */

	pl011_quiesce_irqs(port);



	status = pl011_read(uap, UART01x_FR);

	status = pl011_read(uap, REG_FR);

	if (status & UART01x_FR_RXFE)

		return NO_POLL_CHAR;



	return pl011_read(uap, UART01x_DR);

	return pl011_read(uap, REG_DR);

}



static void pl011_put_poll_char(struct uart_port *port,
@@ -1528,10 +1538,10 @@ static void pl011_put_poll_char(struct uart_port *port, 
	struct uart_amba_port *uap =

	    container_of(port, struct uart_amba_port, port);



	while (pl011_read(uap, UART01x_FR) & UART01x_FR_TXFF)

	while (pl011_read(uap, REG_FR) & UART01x_FR_TXFF)

		barrier();



	pl011_write(ch, uap, UART01x_DR);

	pl011_write(ch, uap, REG_DR);

}



#endif /* CONFIG_CONSOLE_POLL */
@@ -1557,14 +1567,14 @@ static int pl011_hwinit(struct uart_port *port) 
	/* Clear pending error and receive interrupts */

	pl011_write(UART011_OEIS | UART011_BEIS | UART011_PEIS |

		    UART011_FEIS | UART011_RTIS | UART011_RXIS,

		    uap, UART011_ICR);

		    uap, REG_ICR);



	/*

	 * Save interrupts enable mask, and enable RX interrupts in case if

	 * the interrupt is used for NMI entry.

	 */

	uap->im = pl011_read(uap, UART011_IMSC);

	pl011_write(UART011_RTIM | UART011_RXIM, uap, UART011_IMSC);

	uap->im = pl011_read(uap, REG_IMSC);

	pl011_write(UART011_RTIM | UART011_RXIM, uap, REG_IMSC);



	if (dev_get_platdata(uap->port.dev)) {

		struct amba_pl011_data *plat;
@@ -1578,7 +1588,8 @@ static int pl011_hwinit(struct uart_port *port) 


static bool pl011_split_lcrh(const struct uart_amba_port *uap)

{

	return uap->lcrh_rx != uap->lcrh_tx;

	return pl011_reg_to_offset(uap, uap->lcrh_rx) !=

	       pl011_reg_to_offset(uap, uap->lcrh_tx);

}



static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h)
@@ -1591,14 +1602,14 @@ static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h) 
		 * to get this delay write read only register 10 times

		 */

		for (i = 0; i < 10; ++i)

			pl011_write(0xff, uap, UART011_MIS);

			pl011_write(0xff, uap, REG_MIS);

		pl011_write(lcr_h, uap, uap->lcrh_tx);

	}

}



static int pl011_allocate_irq(struct uart_amba_port *uap)

{

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);



	return request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);

}
@@ -1613,11 +1624,11 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap) 
	spin_lock_irq(&uap->port.lock);



	/* Clear out any spuriously appearing RX interrupts */

	pl011_write(UART011_RTIS | UART011_RXIS, uap, UART011_ICR);

	pl011_write(UART011_RTIS | UART011_RXIS, uap, REG_ICR);

	uap->im = UART011_RTIM;

	if (!pl011_dma_rx_running(uap))

		uap->im |= UART011_RXIM;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(uap->im, uap, REG_IMSC);

	spin_unlock_irq(&uap->port.lock);

}
@@ -1636,21 +1647,21 @@ static int pl011_startup(struct uart_port *port) 
	if (retval)

		goto clk_dis;



	pl011_write(uap->vendor->ifls, uap, UART011_IFLS);

	pl011_write(uap->vendor->ifls, uap, REG_IFLS);



	spin_lock_irq(&uap->port.lock);



	/* restore RTS and DTR */

	cr = uap->old_cr & (UART011_CR_RTS | UART011_CR_DTR);

	cr |= UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE;

	pl011_write(cr, uap, UART011_CR);

	pl011_write(cr, uap, REG_CR);



	spin_unlock_irq(&uap->port.lock);



	/*

	 * initialise the old status of the modem signals

	 */

	uap->old_status = pl011_read(uap, UART01x_FR) & UART01x_FR_MODEM_ANY;

	uap->old_status = pl011_read(uap, REG_FR) & UART01x_FR_MODEM_ANY;



	/* Startup DMA */

	pl011_dma_startup(uap);
@@ -1707,11 +1718,11 @@ static void pl011_disable_uart(struct uart_amba_port *uap) 


	uap->autorts = false;

	spin_lock_irq(&uap->port.lock);

	cr = pl011_read(uap, UART011_CR);

	cr = pl011_read(uap, REG_CR);

	uap->old_cr = cr;

	cr &= UART011_CR_RTS | UART011_CR_DTR;

	cr |= UART01x_CR_UARTEN | UART011_CR_TXE;

	pl011_write(cr, uap, UART011_CR);

	pl011_write(cr, uap, REG_CR);

	spin_unlock_irq(&uap->port.lock);



	/*
@@ -1728,8 +1739,8 @@ static void pl011_disable_interrupts(struct uart_amba_port *uap) 


	/* mask all interrupts and clear all pending ones */

	uap->im = 0;

	pl011_write(uap->im, uap, UART011_IMSC);

	pl011_write(0xffff, uap, UART011_ICR);

	pl011_write(uap->im, uap, REG_IMSC);

	pl011_write(0xffff, uap, REG_ICR);



	spin_unlock_irq(&uap->port.lock);

}
@@ -1881,8 +1892,8 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, 
		pl011_enable_ms(port);



	/* first, disable everything */

	old_cr = pl011_read(uap, UART011_CR);

	pl011_write(0, uap, UART011_CR);

	old_cr = pl011_read(uap, REG_CR);

	pl011_write(0, uap, REG_CR);



	if (termios->c_cflag & CRTSCTS) {

		if (old_cr & UART011_CR_RTS)
@@ -1915,17 +1926,17 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, 
			quot -= 2;

	}

	/* Set baud rate */

	pl011_write(quot & 0x3f, uap, UART011_FBRD);

	pl011_write(quot >> 6, uap, UART011_IBRD);

	pl011_write(quot & 0x3f, uap, REG_FBRD);

	pl011_write(quot >> 6, uap, REG_IBRD);



	/*

	 * ----------v----------v----------v----------v-----

	 * NOTE: lcrh_tx and lcrh_rx MUST BE WRITTEN AFTER

	 * UART011_FBRD & UART011_IBRD.

	 * REG_FBRD & REG_IBRD.

	 * ----------^----------^----------^----------^-----

	 */

	pl011_write_lcr_h(uap, lcr_h);

	pl011_write(old_cr, uap, UART011_CR);

	pl011_write(old_cr, uap, REG_CR);



	spin_unlock_irqrestore(&port->lock, flags);

}
@@ -2066,9 +2077,9 @@ static void pl011_console_putchar(struct uart_port *port, int ch) 
	struct uart_amba_port *uap =

	    container_of(port, struct uart_amba_port, port);



	while (pl011_read(uap, UART01x_FR) & UART01x_FR_TXFF)

	while (pl011_read(uap, REG_FR) & UART01x_FR_TXFF)

		barrier();

	pl011_write(ch, uap, UART01x_DR);

	pl011_write(ch, uap, REG_DR);

}



static void
@@ -2093,10 +2104,10 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) 
	 *	First save the CR then disable the interrupts

	 */

	if (!uap->vendor->always_enabled) {

		old_cr = pl011_read(uap, UART011_CR);

		old_cr = pl011_read(uap, REG_CR);

		new_cr = old_cr & ~UART011_CR_CTSEN;

		new_cr |= UART01x_CR_UARTEN | UART011_CR_TXE;

		pl011_write(new_cr, uap, UART011_CR);

		pl011_write(new_cr, uap, REG_CR);

	}



	uart_console_write(&uap->port, s, count, pl011_console_putchar);
@@ -2106,10 +2117,10 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) 
	 *	and restore the TCR

	 */

	do {

		status = pl011_read(uap, UART01x_FR);

		status = pl011_read(uap, REG_FR);

	} while (status & UART01x_FR_BUSY);

	if (!uap->vendor->always_enabled)

		pl011_write(old_cr, uap, UART011_CR);

		pl011_write(old_cr, uap, REG_CR);



	if (locked)

		spin_unlock(&uap->port.lock);
@@ -2122,7 +2133,7 @@ static void __init 
pl011_console_get_options(struct uart_amba_port *uap, int *baud,

			     int *parity, int *bits)

{

	if (pl011_read(uap, UART011_CR) & UART01x_CR_UARTEN) {

	if (pl011_read(uap, REG_CR) & UART01x_CR_UARTEN) {

		unsigned int lcr_h, ibrd, fbrd;



		lcr_h = pl011_read(uap, uap->lcrh_tx);
@@ -2140,13 +2151,13 @@ pl011_console_get_options(struct uart_amba_port *uap, int *baud, 
		else

			*bits = 8;



		ibrd = pl011_read(uap, UART011_IBRD);

		fbrd = pl011_read(uap, UART011_FBRD);

		ibrd = pl011_read(uap, REG_IBRD);

		fbrd = pl011_read(uap, REG_FBRD);



		*baud = uap->port.uartclk * 4 / (64 * ibrd + fbrd);



		if (uap->vendor->oversampling) {

			if (pl011_read(uap, UART011_CR)

			if (pl011_read(uap, REG_CR)

				  & ST_UART011_CR_OVSFACT)

				*baud *= 2;

		}
@@ -2218,10 +2229,10 @@ static struct console amba_console = { 


static void pl011_putc(struct uart_port *port, int c)

{

	while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)

	while (readl(port->membase + REG_FR) & UART01x_FR_TXFF)

		;

	writeb(c, port->membase + UART01x_DR);

	while (readl(port->membase + UART01x_FR) & UART01x_FR_BUSY)

	writeb(c, port->membase + REG_DR);

	while (readl(port->membase + REG_FR) & UART01x_FR_BUSY)

		;

}
@@ -2348,8 +2359,8 @@ static int pl011_register_port(struct uart_amba_port *uap) 
	int ret;



	/* Ensure interrupts from this UART are masked and cleared */

	pl011_write(0, uap, UART011_IMSC);

	pl011_write(0xffff, uap, UART011_ICR);

	pl011_write(0, uap, REG_IMSC);

	pl011_write(0xffff, uap, REG_ICR);



	if (!amba_reg.state) {

		ret = uart_register_driver(&amba_reg);

drivers/tty/serial/amba-pl011.h

0 → 100644
+32 −0
Original line number Diff line number Diff line 
#ifndef AMBA_PL011_H

#define AMBA_PL011_H



enum {

	REG_DR = UART01x_DR,

	REG_ST_DMAWM = ST_UART011_DMAWM,

	REG_ST_TIMEOUT = ST_UART011_TIMEOUT,

	REG_FR = UART01x_FR,

	REG_ST_LCRH_RX = ST_UART011_LCRH_RX,

	REG_IBRD = UART011_IBRD,

	REG_FBRD = UART011_FBRD,

	REG_LCRH = UART011_LCRH,

	REG_ST_LCRH_TX = ST_UART011_LCRH_TX,

	REG_CR = UART011_CR,

	REG_IFLS = UART011_IFLS,

	REG_IMSC = UART011_IMSC,

	REG_RIS = UART011_RIS,

	REG_MIS = UART011_MIS,

	REG_ICR = UART011_ICR,

	REG_DMACR = UART011_DMACR,

	REG_ST_XFCR = ST_UART011_XFCR,

	REG_ST_XON1 = ST_UART011_XON1,

	REG_ST_XON2 = ST_UART011_XON2,

	REG_ST_XOFF1 = ST_UART011_XOFF1,

	REG_ST_XOFF2 = ST_UART011_XOFF2,

	REG_ST_ITCR = ST_UART011_ITCR,

	REG_ST_ITIP = ST_UART011_ITIP,

	REG_ST_ABCR = ST_UART011_ABCR,

	REG_ST_ABIMSC = ST_UART011_ABIMSC,

};



#endif