Release 4.14 arch/powerpc/boot/ns16550.c
// SPDX-License-Identifier: GPL-2.0
/*
* 16550 serial console support.
*
* Original copied from <file:arch/ppc/boot/common/ns16550.c>
* (which had no copyright)
* Modifications: 2006 (c) MontaVista Software, Inc.
*
* Modified by: Mark A. Greer <mgreer@mvista.com>
*/
#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "string.h"
#include "stdio.h"
#include "io.h"
#include "ops.h"
#define UART_DLL 0
/* Out: Divisor Latch Low */
#define UART_DLM 1
/* Out: Divisor Latch High */
#define UART_FCR 2
/* Out: FIFO Control Register */
#define UART_LCR 3
/* Out: Line Control Register */
#define UART_MCR 4
/* Out: Modem Control Register */
#define UART_LSR 5
/* In: Line Status Register */
#define UART_LSR_THRE 0x20
/* Transmit-hold-register empty */
#define UART_LSR_DR 0x01
/* Receiver data ready */
#define UART_MSR 6
/* In: Modem Status Register */
#define UART_SCR 7
/* I/O: Scratch Register */
static unsigned char *reg_base;
static u32 reg_shift;
static int ns16550_open(void)
{
out_8(reg_base + (UART_FCR << reg_shift), 0x06);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static void ns16550_putc(unsigned char c)
{
while ((in_8(reg_base + (UART_LSR << reg_shift)) & UART_LSR_THRE) == 0);
out_8(reg_base, c);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 37 | 100.00% | 1 | 100.00% |
| Total | 37 | 100.00% | 1 | 100.00% |
static unsigned char ns16550_getc(void)
{
while ((in_8(reg_base + (UART_LSR << reg_shift)) & UART_LSR_DR) == 0);
return in_8(reg_base);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static u8 ns16550_tstc(void)
{
return ((in_8(reg_base + (UART_LSR << reg_shift)) & UART_LSR_DR) != 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
int ns16550_console_init(void *devp, struct serial_console_data *scdp)
{
int n;
u32 reg_offset;
if (dt_get_virtual_reg(devp, (void **)®_base, 1) < 1)
return -1;
n = getprop(devp, "reg-offset", ®_offset, sizeof(reg_offset));
if (n == sizeof(reg_offset))
reg_base += reg_offset;
n = getprop(devp, "reg-shift", ®_shift, sizeof(reg_shift));
if (n != sizeof(reg_shift))
reg_shift = 0;
scdp->open = ns16550_open;
scdp->putc = ns16550_putc;
scdp->getc = ns16550_getc;
scdp->tstc = ns16550_tstc;
scdp->close = NULL;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 86 | 63.24% | 1 | 25.00% |
| John Linn | 33 | 24.26% | 1 | 25.00% |
| Laurent Pinchart | 10 | 7.35% | 1 | 25.00% |
| Scott Wood | 7 | 5.15% | 1 | 25.00% |
| Total | 136 | 100.00% | 4 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark A. Greer | 292 | 85.13% | 1 | 20.00% |
| John Linn | 33 | 9.62% | 1 | 20.00% |
| Laurent Pinchart | 10 | 2.92% | 1 | 20.00% |
| Scott Wood | 7 | 2.04% | 1 | 20.00% |
| Greg Kroah-Hartman | 1 | 0.29% | 1 | 20.00% |
| Total | 343 | 100.00% | 5 | 100.00% |
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