1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Serial port stubs for kernel decompress status messages
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Initially based on:
5*4882a593Smuzhiyun * arch/arm/plat-omap/include/mach/uncompress.h
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Original copyrights follow.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (C) 2000 RidgeRun, Inc.
10*4882a593Smuzhiyun * Author: Greg Lonnon <glonnon@ridgerun.com>
11*4882a593Smuzhiyun *
12*4882a593Smuzhiyun * Rewritten by:
13*4882a593Smuzhiyun * Author: <source@mvista.com>
14*4882a593Smuzhiyun * 2004 (c) MontaVista Software, Inc.
15*4882a593Smuzhiyun *
16*4882a593Smuzhiyun * This file is licensed under the terms of the GNU General Public License
17*4882a593Smuzhiyun * version 2. This program is licensed "as is" without any warranty of any
18*4882a593Smuzhiyun * kind, whether express or implied.
19*4882a593Smuzhiyun */
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <linux/types.h>
22*4882a593Smuzhiyun #include <linux/serial_reg.h>
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include <asm/mach-types.h>
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #include <mach/serial.h>
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #define IOMEM(x) ((void __force __iomem *)(x))
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun u32 *uart;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun /* PORT_16C550A, in polled non-fifo mode */
putc(char c)33*4882a593Smuzhiyun static inline void putc(char c)
34*4882a593Smuzhiyun {
35*4882a593Smuzhiyun if (!uart)
36*4882a593Smuzhiyun return;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun while (!(uart[UART_LSR] & UART_LSR_THRE))
39*4882a593Smuzhiyun barrier();
40*4882a593Smuzhiyun uart[UART_TX] = c;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
flush(void)43*4882a593Smuzhiyun static inline void flush(void)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun if (!uart)
46*4882a593Smuzhiyun return;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun while (!(uart[UART_LSR] & UART_LSR_THRE))
49*4882a593Smuzhiyun barrier();
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
set_uart_info(u32 phys)52*4882a593Smuzhiyun static inline void set_uart_info(u32 phys)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun uart = (u32 *)phys;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun #define _DEBUG_LL_ENTRY(machine, phys) \
58*4882a593Smuzhiyun { \
59*4882a593Smuzhiyun if (machine_is_##machine()) { \
60*4882a593Smuzhiyun set_uart_info(phys); \
61*4882a593Smuzhiyun break; \
62*4882a593Smuzhiyun } \
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun #define DEBUG_LL_DAVINCI(machine, port) \
66*4882a593Smuzhiyun _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE)
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun #define DEBUG_LL_DA8XX(machine, port) \
69*4882a593Smuzhiyun _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE)
70*4882a593Smuzhiyun
__arch_decomp_setup(unsigned long arch_id)71*4882a593Smuzhiyun static inline void __arch_decomp_setup(unsigned long arch_id)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun /*
74*4882a593Smuzhiyun * Initialize the port based on the machine ID from the bootloader.
75*4882a593Smuzhiyun * Note that we're using macros here instead of switch statement
76*4882a593Smuzhiyun * as machine_is functions are optimized out for the boards that
77*4882a593Smuzhiyun * are not selected.
78*4882a593Smuzhiyun */
79*4882a593Smuzhiyun do {
80*4882a593Smuzhiyun /* Davinci boards */
81*4882a593Smuzhiyun DEBUG_LL_DAVINCI(davinci_evm, 0);
82*4882a593Smuzhiyun DEBUG_LL_DAVINCI(sffsdr, 0);
83*4882a593Smuzhiyun DEBUG_LL_DAVINCI(neuros_osd2, 0);
84*4882a593Smuzhiyun DEBUG_LL_DAVINCI(davinci_dm355_evm, 0);
85*4882a593Smuzhiyun DEBUG_LL_DAVINCI(dm355_leopard, 0);
86*4882a593Smuzhiyun DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0);
87*4882a593Smuzhiyun DEBUG_LL_DAVINCI(davinci_dm365_evm, 0);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun /* DA8xx boards */
90*4882a593Smuzhiyun DEBUG_LL_DA8XX(davinci_da830_evm, 2);
91*4882a593Smuzhiyun DEBUG_LL_DA8XX(davinci_da850_evm, 2);
92*4882a593Smuzhiyun DEBUG_LL_DA8XX(mityomapl138, 1);
93*4882a593Smuzhiyun DEBUG_LL_DA8XX(omapl138_hawkboard, 2);
94*4882a593Smuzhiyun } while (0);
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun #define arch_decomp_setup() __arch_decomp_setup(arch_id)
98