diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/tty/hvc/hvc_dcc.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/tty/hvc/hvc_dcc.c | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/ANDROID_3.4.5/drivers/tty/hvc/hvc_dcc.c b/ANDROID_3.4.5/drivers/tty/hvc/hvc_dcc.c deleted file mode 100644 index 44fbebab..00000000 --- a/ANDROID_3.4.5/drivers/tty/hvc/hvc_dcc.c +++ /dev/null @@ -1,106 +0,0 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/moduleparam.h> -#include <linux/types.h> - -#include <asm/processor.h> - -#include "hvc_console.h" - -/* DCC Status Bits */ -#define DCC_STATUS_RX (1 << 30) -#define DCC_STATUS_TX (1 << 29) - -static inline u32 __dcc_getstatus(void) -{ - u32 __ret; - asm volatile("mrc p14, 0, %0, c0, c1, 0 @ read comms ctrl reg" - : "=r" (__ret) : : "cc"); - - return __ret; -} - - -static inline char __dcc_getchar(void) -{ - char __c; - - asm volatile("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg" - : "=r" (__c)); - isb(); - - return __c; -} - -static inline void __dcc_putchar(char c) -{ - asm volatile("mcr p14, 0, %0, c0, c5, 0 @ write a char" - : /* no output register */ - : "r" (c)); - isb(); -} - -static int hvc_dcc_put_chars(uint32_t vt, const char *buf, int count) -{ - int i; - - for (i = 0; i < count; i++) { - while (__dcc_getstatus() & DCC_STATUS_TX) - cpu_relax(); - - __dcc_putchar(buf[i]); - } - - return count; -} - -static int hvc_dcc_get_chars(uint32_t vt, char *buf, int count) -{ - int i; - - for (i = 0; i < count; ++i) - if (__dcc_getstatus() & DCC_STATUS_RX) - buf[i] = __dcc_getchar(); - else - break; - - return i; -} - -static const struct hv_ops hvc_dcc_get_put_ops = { - .get_chars = hvc_dcc_get_chars, - .put_chars = hvc_dcc_put_chars, -}; - -static int __init hvc_dcc_console_init(void) -{ - hvc_instantiate(0, 0, &hvc_dcc_get_put_ops); - return 0; -} -console_initcall(hvc_dcc_console_init); - -static int __init hvc_dcc_init(void) -{ - hvc_alloc(0, 0, &hvc_dcc_get_put_ops, 128); - return 0; -} -device_initcall(hvc_dcc_init); |