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OMAP: Serial: Define OMAP uart MDR1 reg and remove magic numbers 

Define MDR1 register serial definitions used in serial and
bluetooth drivers.
Change magic number to ones defined in serial_reg for omap1/2
serial driver.
Remove redefined MDR1 register definitions in omap-serial driver.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: G, Manjunath Kondaiah <manjugk@ti.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Andrei Emeltchenko 2010-11-30 14:11:49 -08:00 committed by Tony Lindgren
parent e8a7e48bb2
commit 498cb95175
5 changed files with 28 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-omap1/serial.c
View File

@ -52,9 +52,11 @@ static inline void omap_serial_outp(struct plat_serial8250_port *p, int offset,
*/ */
static void __init omap_serial_reset(struct plat_serial8250_port *p) static void __init omap_serial_reset(struct plat_serial8250_port *p)
{ {
omap_serial_outp(p, UART_OMAP_MDR1, 0x07); /* disable UART */ omap_serial_outp(p, UART_OMAP_MDR1,
UART_OMAP_MDR1_DISABLE); /* disable UART */
omap_serial_outp(p, UART_OMAP_SCR, 0x08); /* TX watermark */ omap_serial_outp(p, UART_OMAP_SCR, 0x08); /* TX watermark */
omap_serial_outp(p, UART_OMAP_MDR1, 0x00); /* enable UART */ omap_serial_outp(p, UART_OMAP_MDR1,
UART_OMAP_MDR1_16X_MODE); /* enable UART */
if (!cpu_is_omap15xx()) { if (!cpu_is_omap15xx()) {
omap_serial_outp(p, UART_OMAP_SYSC, 0x01); omap_serial_outp(p, UART_OMAP_SYSC, 0x01);

15
arch/arm/mach-omap2/serial.c
View File

@ -169,9 +169,9 @@ static inline void serial_write_reg(struct omap_uart_state *uart, int offset,
static inline void __init omap_uart_reset(struct omap_uart_state *uart) static inline void __init omap_uart_reset(struct omap_uart_state *uart)
{ {
serial_write_reg(uart, UART_OMAP_MDR1, 0x07); serial_write_reg(uart, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE);
serial_write_reg(uart, UART_OMAP_SCR, 0x08); serial_write_reg(uart, UART_OMAP_SCR, 0x08);
serial_write_reg(uart, UART_OMAP_MDR1, 0x00); serial_write_reg(uart, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE);
} }
#if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) #if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3)
@ -247,9 +247,10 @@ static void omap_uart_restore_context(struct omap_uart_state *uart)
uart->context_valid = 0; uart->context_valid = 0;
if (uart->errata & UART_ERRATA_i202_MDR1_ACCESS) if (uart->errata & UART_ERRATA_i202_MDR1_ACCESS)
omap_uart_mdr1_errataset(uart, 0x07, 0xA0); omap_uart_mdr1_errataset(uart, UART_OMAP_MDR1_DISABLE, 0xA0);
else else
serial_write_reg(uart, UART_OMAP_MDR1, 0x7); serial_write_reg(uart, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE);
serial_write_reg(uart, UART_LCR, 0xBF); /* Config B mode */ serial_write_reg(uart, UART_LCR, 0xBF); /* Config B mode */
efr = serial_read_reg(uart, UART_EFR); efr = serial_read_reg(uart, UART_EFR);
serial_write_reg(uart, UART_EFR, UART_EFR_ECB); serial_write_reg(uart, UART_EFR, UART_EFR_ECB);
@ -268,11 +269,13 @@ static void omap_uart_restore_context(struct omap_uart_state *uart)
serial_write_reg(uart, UART_OMAP_SCR, uart->scr); serial_write_reg(uart, UART_OMAP_SCR, uart->scr);
serial_write_reg(uart, UART_OMAP_WER, uart->wer); serial_write_reg(uart, UART_OMAP_WER, uart->wer);
serial_write_reg(uart, UART_OMAP_SYSC, uart->sysc); serial_write_reg(uart, UART_OMAP_SYSC, uart->sysc);
if (uart->errata & UART_ERRATA_i202_MDR1_ACCESS) if (uart->errata & UART_ERRATA_i202_MDR1_ACCESS)
omap_uart_mdr1_errataset(uart, 0x00, 0xA1); omap_uart_mdr1_errataset(uart, UART_OMAP_MDR1_16X_MODE, 0xA1);
else else
/* UART 16x mode */ /* UART 16x mode */
serial_write_reg(uart, UART_OMAP_MDR1, 0x00); serial_write_reg(uart, UART_OMAP_MDR1,
UART_OMAP_MDR1_16X_MODE);
} }
#else #else
static inline void omap_uart_save_context(struct omap_uart_state *uart) {} static inline void omap_uart_save_context(struct omap_uart_state *uart) {}

3
arch/arm/plat-omap/include/plat/omap-serial.h
View File

@ -31,9 +31,6 @@
*/ */
#define OMAP_SERIAL_NAME "ttyO" #define OMAP_SERIAL_NAME "ttyO"
#define OMAP_MDR1_DISABLE 0x07
#define OMAP_MDR1_MODE13X 0x03
#define OMAP_MDR1_MODE16X 0x00
#define OMAP_MODE13X_SPEED 230400 #define OMAP_MODE13X_SPEED 230400
/* /*

6
drivers/serial/omap-serial.c
View File

@ -753,7 +753,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
/* Protocol, Baud Rate, and Interrupt Settings */ /* Protocol, Baud Rate, and Interrupt Settings */
serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_DISABLE); serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE);
serial_out(up, UART_LCR, OMAP_UART_LCR_CONF_MDB); serial_out(up, UART_LCR, OMAP_UART_LCR_CONF_MDB);
up->efr = serial_in(up, UART_EFR); up->efr = serial_in(up, UART_EFR);
@ -774,9 +774,9 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
serial_out(up, UART_LCR, cval); serial_out(up, UART_LCR, cval);
if (baud > 230400 && baud != 3000000) if (baud > 230400 && baud != 3000000)
serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_MODE13X); serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_13X_MODE);
else else
serial_out(up, UART_OMAP_MDR1, OMAP_MDR1_MODE16X); serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE);
/* Hardware Flow Control Configuration */ /* Hardware Flow Control Configuration */

12
include/linux/serial_reg.h
View File

@ -341,5 +341,17 @@
#define UART_OMAP_SYSS 0x16 /* System status register */ #define UART_OMAP_SYSS 0x16 /* System status register */
#define UART_OMAP_WER 0x17 /* Wake-up enable register */ #define UART_OMAP_WER 0x17 /* Wake-up enable register */
/*
* These are the definitions for the MDR1 register
*/
#define UART_OMAP_MDR1_16X_MODE 0x00 /* UART 16x mode */
#define UART_OMAP_MDR1_SIR_MODE 0x01 /* SIR mode */
#define UART_OMAP_MDR1_16X_ABAUD_MODE 0x02 /* UART 16x auto-baud */
#define UART_OMAP_MDR1_13X_MODE 0x03 /* UART 13x mode */
#define UART_OMAP_MDR1_MIR_MODE 0x04 /* MIR mode */
#define UART_OMAP_MDR1_FIR_MODE 0x05 /* FIR mode */
#define UART_OMAP_MDR1_CIR_MODE 0x06 /* CIR mode */
#define UART_OMAP_MDR1_DISABLE 0x07 /* Disable (default state) */
#endif /* _LINUX_SERIAL_REG_H */ #endif /* _LINUX_SERIAL_REG_H */