Commit c538d20c authored by Govindraj.R's avatar Govindraj.R Committed by Kevin Hilman
Browse files

ARM: OMAP2+: UART: Ensure all reg values configured are available from port structure 



Add missing uart regs to uart_port structure which can be used in
context restore. Store dll, dlh, mdr1, scr, efr, lcr, mcr reg values
into uart_port structure while configuring individual port in termios
function.

Signed-off-by: default avatarGovindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> (for drivers/tty changes)
Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
parent 9f9ac1e8

arch/arm/plat-omap/include/plat/omap-serial.h

+4 −0
Original line number Diff line number Diff line
@@ -97,6 +97,10 @@ struct uart_omap_port { 
	unsigned char		mcr;

	unsigned char		fcr;

	unsigned char		efr;

	unsigned char		dll;

	unsigned char		dlh;

	unsigned char		mdr1;

	unsigned char		scr;



	int			use_dma;

	/*

drivers/tty/serial/omap-serial.c

+26 −17
Original line number Diff line number Diff line
@@ -466,8 +466,9 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) 
		mcr |= UART_MCR_LOOP;



	pm_runtime_get_sync(&up->pdev->dev);

	mcr |= up->mcr;

	serial_out(up, UART_MCR, mcr);

	up->mcr = serial_in(up, UART_MCR);

	up->mcr |= mcr;

	serial_out(up, UART_MCR, up->mcr);

	pm_runtime_put(&up->pdev->dev);

}
@@ -616,8 +617,6 @@ static inline void 
serial_omap_configure_xonxoff

		(struct uart_omap_port *up, struct ktermios *termios)

{

	unsigned char efr = 0;



	up->lcr = serial_in(up, UART_LCR);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);

	up->efr = serial_in(up, UART_EFR);
@@ -627,8 +626,7 @@ serial_omap_configure_xonxoff 
	serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]);



	/* clear SW control mode bits */

	efr = up->efr;

	efr &= OMAP_UART_SW_CLR;

	up->efr &= OMAP_UART_SW_CLR;



	/*

	 * IXON Flag:
@@ -636,7 +634,7 @@ serial_omap_configure_xonxoff 
	 * Transmit XON1, XOFF1

	 */

	if (termios->c_iflag & IXON)

		efr |= OMAP_UART_SW_TX;

		up->efr |= OMAP_UART_SW_TX;



	/*

	 * IXOFF Flag:
@@ -644,7 +642,7 @@ serial_omap_configure_xonxoff 
	 * Receiver compares XON1, XOFF1.

	 */

	if (termios->c_iflag & IXOFF)

		efr |= OMAP_UART_SW_RX;

		up->efr |= OMAP_UART_SW_RX;



	serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
@@ -667,7 +665,7 @@ serial_omap_configure_xonxoff 
	 * load the new software flow control mode IXON or IXOFF

	 * and restore the UARTi.EFR_REG[4] ENHANCED_EN value.

	 */

	serial_out(up, UART_EFR, efr | UART_EFR_SCD);

	serial_out(up, UART_EFR, up->efr | UART_EFR_SCD);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);



	serial_out(up, UART_MCR, up->mcr & ~UART_MCR_TCRTLR);
@@ -714,6 +712,10 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, 
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13);

	quot = serial_omap_get_divisor(port, baud);



	up->dll = quot & 0xff;

	up->dlh = quot >> 8;

	up->mdr1 = UART_OMAP_MDR1_DISABLE;



	up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 |

			UART_FCR_ENABLE_FIFO;

	if (up->use_dma)
@@ -767,6 +769,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, 
		up->ier |= UART_IER_MSI;

	serial_out(up, UART_IER, up->ier);

	serial_out(up, UART_LCR, cval);		/* reset DLAB */

	up->lcr = cval;



	/* FIFOs and DMA Settings */
@@ -793,17 +796,18 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, 


	if (up->use_dma) {

		serial_out(up, UART_TI752_TLR, 0);

		serial_out(up, UART_OMAP_SCR,

			(UART_FCR_TRIGGER_4 | UART_FCR_TRIGGER_8));

		up->scr |= (UART_FCR_TRIGGER_4 | UART_FCR_TRIGGER_8);

	}



	serial_out(up, UART_OMAP_SCR, up->scr);



	serial_out(up, UART_EFR, up->efr);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);

	serial_out(up, UART_MCR, up->mcr);



	/* Protocol, Baud Rate, and Interrupt Settings */



	serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE);

	serial_out(up, UART_OMAP_MDR1, up->mdr1);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);



	up->efr = serial_in(up, UART_EFR);
@@ -813,8 +817,8 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, 
	serial_out(up, UART_IER, 0);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);



	serial_out(up, UART_DLL, quot & 0xff);          /* LS of divisor */

	serial_out(up, UART_DLM, quot >> 8);            /* MS of divisor */

	serial_out(up, UART_DLL, up->dll);	/* LS of divisor */

	serial_out(up, UART_DLM, up->dlh);	/* MS of divisor */



	serial_out(up, UART_LCR, 0);

	serial_out(up, UART_IER, up->ier);
@@ -824,9 +828,11 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, 
	serial_out(up, UART_LCR, cval);



	if (baud > 230400 && baud != 3000000)

		serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_13X_MODE);

		up->mdr1 = UART_OMAP_MDR1_13X_MODE;

	else

		serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE);

		up->mdr1 = UART_OMAP_MDR1_16X_MODE;



	serial_out(up, UART_OMAP_MDR1, up->mdr1);



	/* Hardware Flow Control Configuration */
@@ -1416,15 +1422,18 @@ static void serial_omap_restore_context(struct uart_omap_port *up) 
	serial_out(up, UART_LCR, 0x0); /* Operational mode */

	serial_out(up, UART_IER, 0x0);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /* Config B mode */

	serial_out(up, UART_DLL, up->dll);

	serial_out(up, UART_DLM, up->dlh);

	serial_out(up, UART_LCR, 0x0); /* Operational mode */

	serial_out(up, UART_IER, up->ier);

	serial_out(up, UART_FCR, up->fcr);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);

	serial_out(up, UART_MCR, up->mcr);

	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); /* Config B mode */

	serial_out(up, UART_OMAP_SCR, up->scr);

	serial_out(up, UART_EFR, up->efr);

	serial_out(up, UART_LCR, up->lcr);

	serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE);

	serial_out(up, UART_OMAP_MDR1, up->mdr1);

}



#ifdef CONFIG_PM_RUNTIME

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