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authorGovindraj.R <govindraj.raja@ti.com>2011-11-07 18:57:03 +0530
committerKevin Hilman <khilman@ti.com>2011-12-14 16:05:21 -0800
commitc538d20c7f437e56c5301357c492230d1d6d1b80 (patch)
tree95fd5bc4d668bd211a082e29b410e7cb86355041 /drivers/tty
parent9f9ac1e84a24670eea1430040e0aef278b4daffa (diff)
downloadop-kernel-dev-c538d20c7f437e56c5301357c492230d1d6d1b80.zip
op-kernel-dev-c538d20c7f437e56c5301357c492230d1d6d1b80.tar.gz
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: Govindraj.R <govindraj.raja@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> (for drivers/tty changes) Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/omap-serial.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index a834e91..5327ff0 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -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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