f49c2916aa3aad2b0b4adb0092a9cf25b703d155
[sfrench/cifs-2.6.git] / arch / arm / mach-davinci / include / mach / uncompress.h
1 /*
2  * Serial port stubs for kernel decompress status messages
3  *
4  * Initially based on:
5  * arch/arm/plat-omap/include/mach/uncompress.h
6  *
7  * Original copyrights follow.
8  *
9  * Copyright (C) 2000 RidgeRun, Inc.
10  * Author: Greg Lonnon <glonnon@ridgerun.com>
11  *
12  * Rewritten by:
13  * Author: <source@mvista.com>
14  * 2004 (c) MontaVista Software, Inc.
15  *
16  * This file is licensed under the terms of the GNU General Public License
17  * version 2. This program is licensed "as is" without any warranty of any
18  * kind, whether express or implied.
19  */
20
21 #include <linux/types.h>
22 #include <linux/serial_reg.h>
23
24 #include <asm/mach-types.h>
25
26 #include <mach/serial.h>
27
28 #define IOMEM(x)        ((void __force __iomem *)(x))
29
30 u32 *uart;
31
32 /* PORT_16C550A, in polled non-fifo mode */
33 static void putc(char c)
34 {
35         if (!uart)
36                 return;
37
38         while (!(uart[UART_LSR] & UART_LSR_THRE))
39                 barrier();
40         uart[UART_TX] = c;
41 }
42
43 static inline void flush(void)
44 {
45         if (!uart)
46                 return;
47
48         while (!(uart[UART_LSR] & UART_LSR_THRE))
49                 barrier();
50 }
51
52 static inline void set_uart_info(u32 phys)
53 {
54         uart = (u32 *)phys;
55 }
56
57 #define _DEBUG_LL_ENTRY(machine, phys)                          \
58         {                                                       \
59                 if (machine_is_##machine()) {                   \
60                         set_uart_info(phys);                    \
61                         break;                                  \
62                 }                                               \
63         }
64
65 #define DEBUG_LL_DAVINCI(machine, port)                         \
66         _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE)
67
68 #define DEBUG_LL_DA8XX(machine, port)                           \
69         _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE)
70
71 #define DEBUG_LL_TNETV107X(machine, port)                       \
72         _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE)
73
74 static inline void __arch_decomp_setup(unsigned long arch_id)
75 {
76         /*
77          * Initialize the port based on the machine ID from the bootloader.
78          * Note that we're using macros here instead of switch statement
79          * as machine_is functions are optimized out for the boards that
80          * are not selected.
81          */
82         do {
83                 /* Davinci boards */
84                 DEBUG_LL_DAVINCI(davinci_evm,           0);
85                 DEBUG_LL_DAVINCI(sffsdr,                0);
86                 DEBUG_LL_DAVINCI(neuros_osd2,           0);
87                 DEBUG_LL_DAVINCI(davinci_dm355_evm,     0);
88                 DEBUG_LL_DAVINCI(dm355_leopard,         0);
89                 DEBUG_LL_DAVINCI(davinci_dm6467_evm,    0);
90                 DEBUG_LL_DAVINCI(davinci_dm365_evm,     0);
91
92                 /* DA8xx boards */
93                 DEBUG_LL_DA8XX(davinci_da830_evm,       2);
94                 DEBUG_LL_DA8XX(davinci_da850_evm,       2);
95                 DEBUG_LL_DA8XX(mityomapl138,            1);
96                 DEBUG_LL_DA8XX(omapl138_hawkboard,      2);
97
98                 /* TNETV107x boards */
99                 DEBUG_LL_TNETV107X(tnetv107x,           1);
100         } while (0);
101 }
102
103 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)