From: govindraj.raja@ti.com (Govindraj.R)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 08/20] OMAP2+: UART: Ensure all reg values configured are available from port structure
Date: Fri, 11 Nov 2011 15:27:25 +0530 [thread overview]
Message-ID: <1321005446-21741-9-git-send-email-govindraj.raja@ti.com> (raw)
In-Reply-To: <1321005446-21741-1-git-send-email-govindraj.raja@ti.com>
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>
---
arch/arm/plat-omap/include/plat/omap-serial.h | 4 ++
drivers/tty/serial/omap-serial.c | 43 +++++++++++++++----------
2 files changed, 30 insertions(+), 17 deletions(-)
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h
index db9bda9..70e7738 100644
--- a/arch/arm/plat-omap/include/plat/omap-serial.h
+++ b/arch/arm/plat-omap/include/plat/omap-serial.h
@@ -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;
/*
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
--
1.7.4.1
next prev parent reply other threads:[~2011-11-11 9:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-11 9:57 [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup Govindraj.R
2011-11-11 9:57 ` [PATCH v8 01/20] OMAP2+: UART: cleanup + remove uart pm specific API Govindraj.R
2011-11-11 9:57 ` [PATCH v8 02/20] OMAP2+: UART: cleanup 8250 console driver support Govindraj.R
2011-11-11 9:57 ` [PATCH v8 03/20] OMAP2+: UART: Cleanup part of clock gating mechanism for uart Govindraj.R
2011-11-11 9:57 ` [PATCH v8 04/20] OMAP2+: UART: Add default mux for all uarts Govindraj.R
2011-11-11 9:57 ` [PATCH v8 05/20] OMAP2+: UART: Remove mapbase/membase fields from pdata Govindraj.R
2011-11-11 9:57 ` [PATCH v8 06/20] OMAP2+: UART: Add runtime pm support for omap-serial driver Govindraj.R
2011-11-11 9:57 ` [PATCH v8 07/20] OMAP2+: UART: Remove context_save and move context restore to driver Govindraj.R
2011-11-11 9:57 ` Govindraj.R [this message]
2011-11-11 9:57 ` [PATCH v8 09/20] OMAP2+: UART: Remove uart reset function Govindraj.R
2011-12-07 0:21 ` [PATCH v8 00/20] OMAP2+: UART: Runtime adaptation + cleanup Kevin Hilman
2011-12-07 0:46 ` Alan Cox
2011-12-13 14:15 ` Rajendra Nayak
2011-12-13 17:35 ` Kevin Hilman
2011-12-13 13:01 ` Govindraj
2011-12-13 19:26 ` Kevin Hilman
2011-12-14 8:46 ` Govindraj
2011-12-14 15:29 ` Kevin Hilman
2011-12-14 16:20 ` Govindraj
2011-12-14 18:56 ` Kevin Hilman
2011-12-13 23:32 ` Kevin Hilman
2011-12-14 9:21 ` Govindraj
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