linux/arch/mips/au1000/common/dbg_io.c
Sergei Shtylyov c1dcb14ec2 [MIPS] Alchemy common code style cleanup
Fix many errors and warnings given by checkpatch.pl:

- use of C99 // comments;

- missing space between the type and asterisk in a variable declaration;

- space between the asterisk and function/variable name;

- leading spaces instead of tabs;

- space after opening and before closing parentheses;

- initialization of a 'static' variable to 0;

- missing spaces around assignement/comparison operator;

- brace not on the same line with condition (or 'else') in the 'if'/'switch'
  statement;

- missing space between 'if'/'for'/'while' and opening parenthesis;

- use of assignement in 'if' statement's condition;

- printk() without KERN_* facility level;

- EXPORT_SYMBOL() not following its function immediately;

- unnecessary braces for single-statement block;

- adding new 'typedef' (where including <linux/types.h> will do);

- use of 'extern' in the .c file (where it can be avoided by including header);

- line over 80 characters.

In addition to these changes, also do the following:

- insert missing space after opening brace and/or before closing brace in the
  structure initializers;

- insert spaces between operator and its operands;

- put the function's result type and name/parameters on the same line;

- properly indent multi-line expressions;

- remove commented out code;

- remove useless initializers and code;

- remove needless parentheses;

- fix broken/excess indentation;

- add missing spaces between operator and its operands;

- insert missing and remove excess new lines;

- group 'else' and 'if' together where possible;

- make au1xxx_platform_init() 'static';

- regroup variable declarations in pm_do_freq() for prettier look;

- replace numeric literals with the matching macros;

- fix printk() format specifiers mismatching the argument types;

- make the multi-line comment style consistent with the kernel style elsewhere
  by adding empty first line and/or adding space on their left side;

- make two-line comments that only have one line of text one-line;

- fix typos/errors, capitalize acronyms, etc. in the comments;

- fix/remove obsolete references in the comments;

- reformat some comments;

- add comment about the CPU:counter clock ratio to calc_clock();

- update MontaVista copyright;

- remove Pete Popov's and Steve Longerbeam's old email addresses...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-05-12 16:46:52 +01:00

110 lines
2.9 KiB
C

#include <linux/types.h>
#include <asm/mach-au1x00/au1000.h>
#ifdef CONFIG_KGDB
/*
* FIXME the user should be able to select the
* uart to be used for debugging.
*/
#define DEBUG_BASE UART_DEBUG_BASE
#define UART16550_BAUD_2400 2400
#define UART16550_BAUD_4800 4800
#define UART16550_BAUD_9600 9600
#define UART16550_BAUD_19200 19200
#define UART16550_BAUD_38400 38400
#define UART16550_BAUD_57600 57600
#define UART16550_BAUD_115200 115200
#define UART16550_PARITY_NONE 0
#define UART16550_PARITY_ODD 0x08
#define UART16550_PARITY_EVEN 0x18
#define UART16550_PARITY_MARK 0x28
#define UART16550_PARITY_SPACE 0x38
#define UART16550_DATA_5BIT 0x0
#define UART16550_DATA_6BIT 0x1
#define UART16550_DATA_7BIT 0x2
#define UART16550_DATA_8BIT 0x3
#define UART16550_STOP_1BIT 0x0
#define UART16550_STOP_2BIT 0x4
#define UART_RX 0 /* Receive buffer */
#define UART_TX 4 /* Transmit buffer */
#define UART_IER 8 /* Interrupt Enable Register */
#define UART_IIR 0xC /* Interrupt ID Register */
#define UART_FCR 0x10 /* FIFO Control Register */
#define UART_LCR 0x14 /* Line Control Register */
#define UART_MCR 0x18 /* Modem Control Register */
#define UART_LSR 0x1C /* Line Status Register */
#define UART_MSR 0x20 /* Modem Status Register */
#define UART_CLK 0x28 /* Baud Rat4e Clock Divider */
#define UART_MOD_CNTRL 0x100 /* Module Control */
/* memory-mapped read/write of the port */
#define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff)
#define UART16550_WRITE(y, z) (au_writel(z & 0xff, DEBUG_BASE + y))
extern unsigned long calc_clock(void);
void debugInit(u32 baud, u8 data, u8 parity, u8 stop)
{
if (UART16550_READ(UART_MOD_CNTRL) != 0x3)
UART16550_WRITE(UART_MOD_CNTRL, 3);
calc_clock();
/* disable interrupts */
UART16550_WRITE(UART_IER, 0);
/* set up baud rate */
{
u32 divisor;
/* set divisor */
divisor = get_au1x00_uart_baud_base() / baud;
UART16550_WRITE(UART_CLK, divisor & 0xffff);
}
/* set data format */
UART16550_WRITE(UART_LCR, (data | parity | stop));
}
static int remoteDebugInitialized;
u8 getDebugChar(void)
{
if (!remoteDebugInitialized) {
remoteDebugInitialized = 1;
debugInit(UART16550_BAUD_115200,
UART16550_DATA_8BIT,
UART16550_PARITY_NONE,
UART16550_STOP_1BIT);
}
while ((UART16550_READ(UART_LSR) & 0x1) == 0);
return UART16550_READ(UART_RX);
}
int putDebugChar(u8 byte)
{
if (!remoteDebugInitialized) {
remoteDebugInitialized = 1;
debugInit(UART16550_BAUD_115200,
UART16550_DATA_8BIT,
UART16550_PARITY_NONE,
UART16550_STOP_1BIT);
}
while ((UART16550_READ(UART_LSR) & 0x40) == 0);
UART16550_WRITE(UART_TX, byte);
return 1;
}
#endif