Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
[linux-2.6.git] / arch / arm / plat-omap / include / plat / uncompress.h
1 /*
2  * arch/arm/plat-omap/include/mach/uncompress.h
3  *
4  * Serial port stubs for kernel decompress status messages
5  *
6  * Initially based on:
7  * linux-2.4.15-rmk1-dsplinux1.6/arch/arm/plat-omap/include/mach1510/uncompress.h
8  * Copyright (C) 2000 RidgeRun, Inc.
9  * Author: Greg Lonnon <glonnon@ridgerun.com>
10  *
11  * Rewritten by:
12  * Author: <source@mvista.com>
13  * 2004 (c) MontaVista Software, Inc.
14  *
15  * This file is licensed under the terms of the GNU General Public License
16  * version 2. This program is licensed "as is" without any warranty of any
17  * kind, whether express or implied.
18  */
19
20 #include <linux/types.h>
21 #include <linux/serial_reg.h>
22
23 #include <asm/memory.h>
24 #include <asm/mach-types.h>
25
26 #include <plat/serial.h>
27
28 #define MDR1_MODE_MASK                  0x07
29
30 static volatile u8 *uart_base;
31 static int uart_shift;
32
33 /*
34  * Store the DEBUG_LL uart number into memory.
35  * See also debug-macro.S, and serial.c for related code.
36  */
37 static void set_omap_uart_info(unsigned char port)
38 {
39         *(volatile u32 *)OMAP_UART_INFO = port;
40 }
41
42 static void putc(int c)
43 {
44         if (!uart_base)
45                 return;
46
47         /* Check for UART 16x mode */
48         if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
49                 return;
50
51         while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
52                 barrier();
53         uart_base[UART_TX << uart_shift] = c;
54 }
55
56 static inline void flush(void)
57 {
58 }
59
60 /*
61  * Macros to configure UART1 and debug UART
62  */
63 #define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id)               \
64         if (machine_is_##mach()) {                                      \
65                 uart_base = (volatile u8 *)(dbg_uart);                  \
66                 uart_shift = (dbg_shft);                                \
67                 port = (dbg_id);                                        \
68                 set_omap_uart_info(port);                               \
69                 break;                                                  \
70         }
71
72 #define DEBUG_LL_OMAP7XX(p, mach)                                       \
73         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
74                 OMAP1UART##p)
75
76 #define DEBUG_LL_OMAP1(p, mach)                                         \
77         _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT,    \
78                 OMAP1UART##p)
79
80 #define DEBUG_LL_OMAP2(p, mach)                                         \
81         _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT,    \
82                 OMAP2UART##p)
83
84 #define DEBUG_LL_OMAP3(p, mach)                                         \
85         _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT,    \
86                 OMAP3UART##p)
87
88 #define DEBUG_LL_OMAP4(p, mach)                                         \
89         _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT,    \
90                 OMAP4UART##p)
91
92 /* Zoom2/3 shift is different for UART1 and external port */
93 #define DEBUG_LL_ZOOM(mach)                                             \
94         _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
95
96 static inline void __arch_decomp_setup(unsigned long arch_id)
97 {
98         int port = 0;
99
100         /*
101          * Initialize the port based on the machine ID from the bootloader.
102          * Note that we're using macros here instead of switch statement
103          * as machine_is functions are optimized out for the boards that
104          * are not selected.
105          */
106         do {
107                 /* omap7xx/8xx based boards using UART1 with shift 0 */
108                 DEBUG_LL_OMAP7XX(1, herald);
109                 DEBUG_LL_OMAP7XX(1, omap_perseus2);
110
111                 /* omap15xx/16xx based boards using UART1 */
112                 DEBUG_LL_OMAP1(1, ams_delta);
113                 DEBUG_LL_OMAP1(1, nokia770);
114                 DEBUG_LL_OMAP1(1, omap_h2);
115                 DEBUG_LL_OMAP1(1, omap_h3);
116                 DEBUG_LL_OMAP1(1, omap_innovator);
117                 DEBUG_LL_OMAP1(1, omap_osk);
118                 DEBUG_LL_OMAP1(1, omap_palmte);
119                 DEBUG_LL_OMAP1(1, omap_palmz71);
120
121                 /* omap15xx/16xx based boards using UART2 */
122                 DEBUG_LL_OMAP1(2, omap_palmtt);
123
124                 /* omap15xx/16xx based boards using UART3 */
125                 DEBUG_LL_OMAP1(3, sx1);
126
127                 /* omap2 based boards using UART1 */
128                 DEBUG_LL_OMAP2(1, omap2evm);
129                 DEBUG_LL_OMAP2(1, omap_2430sdp);
130                 DEBUG_LL_OMAP2(1, omap_apollon);
131                 DEBUG_LL_OMAP2(1, omap_h4);
132
133                 /* omap2 based boards using UART3 */
134                 DEBUG_LL_OMAP2(3, nokia_n800);
135                 DEBUG_LL_OMAP2(3, nokia_n810);
136                 DEBUG_LL_OMAP2(3, nokia_n810_wimax);
137
138                 /* omap3 based boards using UART1 */
139                 DEBUG_LL_OMAP2(1, omap3evm);
140                 DEBUG_LL_OMAP3(1, omap_3430sdp);
141                 DEBUG_LL_OMAP3(1, omap_3630sdp);
142                 DEBUG_LL_OMAP3(1, omap3530_lv_som);
143                 DEBUG_LL_OMAP3(1, omap3_torpedo);
144
145                 /* omap3 based boards using UART3 */
146                 DEBUG_LL_OMAP3(3, cm_t35);
147                 DEBUG_LL_OMAP3(3, cm_t3517);
148                 DEBUG_LL_OMAP3(3, igep0020);
149                 DEBUG_LL_OMAP3(3, igep0030);
150                 DEBUG_LL_OMAP3(3, nokia_rx51);
151                 DEBUG_LL_OMAP3(3, omap3517evm);
152                 DEBUG_LL_OMAP3(3, omap3_beagle);
153                 DEBUG_LL_OMAP3(3, omap3_pandora);
154                 DEBUG_LL_OMAP3(3, omap_ldp);
155                 DEBUG_LL_OMAP3(3, overo);
156                 DEBUG_LL_OMAP3(3, touchbook);
157
158                 /* omap4 based boards using UART3 */
159                 DEBUG_LL_OMAP4(3, omap_4430sdp);
160                 DEBUG_LL_OMAP4(3, omap4_panda);
161
162                 /* zoom2/3 external uart */
163                 DEBUG_LL_ZOOM(omap_zoom2);
164                 DEBUG_LL_ZOOM(omap_zoom3);
165
166         } while (0);
167 }
168
169 #define arch_decomp_setup()     __arch_decomp_setup(arch_id)
170
171 /*
172  * nothing to do
173  */
174 #define arch_decomp_wdog()