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uncompress.h
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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 <[email protected]>
10  *
11  * Rewritten by:
12  * Author: <[email protected]>
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 volatile u8 *uart_base;
31 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  /*
40  * Get address of some.bss variable and round it down
41  * a la CONFIG_AUTO_ZRELADDR.
42  */
43  u32 ram_start = (u32)&uart_shift & 0xf8000000;
44  u32 *uart_info = (u32 *)(ram_start + OMAP_UART_INFO_OFS);
45  *uart_info = port;
46 }
47 
48 static void putc(int c)
49 {
50  if (!uart_base)
51  return;
52 
53  /* Check for UART 16x mode */
54  if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
55  return;
56 
57  while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
58  barrier();
59  uart_base[UART_TX << uart_shift] = c;
60 }
61 
62 static inline void flush(void)
63 {
64 }
65 
66 /*
67  * Macros to configure UART1 and debug UART
68  */
69 #define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id) \
70  if (machine_is_##mach()) { \
71  uart_base = (volatile u8 *)(dbg_uart); \
72  uart_shift = (dbg_shft); \
73  port = (dbg_id); \
74  set_omap_uart_info(port); \
75  break; \
76  }
77 
78 #define DEBUG_LL_OMAP7XX(p, mach) \
79  _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
80  OMAP1UART##p)
81 
82 #define DEBUG_LL_OMAP1(p, mach) \
83  _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT, \
84  OMAP1UART##p)
85 
86 #define DEBUG_LL_OMAP2(p, mach) \
87  _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT, \
88  OMAP2UART##p)
89 
90 #define DEBUG_LL_OMAP3(p, mach) \
91  _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT, \
92  OMAP3UART##p)
93 
94 #define DEBUG_LL_OMAP4(p, mach) \
95  _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT, \
96  OMAP4UART##p)
97 
98 #define DEBUG_LL_OMAP5(p, mach) \
99  _DEBUG_LL_ENTRY(mach, OMAP5_UART##p##_BASE, OMAP_PORT_SHIFT, \
100  OMAP5UART##p)
101 /* Zoom2/3 shift is different for UART1 and external port */
102 #define DEBUG_LL_ZOOM(mach) \
103  _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
104 
105 #define DEBUG_LL_TI81XX(p, mach) \
106  _DEBUG_LL_ENTRY(mach, TI81XX_UART##p##_BASE, OMAP_PORT_SHIFT, \
107  TI81XXUART##p)
108 
109 #define DEBUG_LL_AM33XX(p, mach) \
110  _DEBUG_LL_ENTRY(mach, AM33XX_UART##p##_BASE, OMAP_PORT_SHIFT, \
111  AM33XXUART##p)
112 
113 static inline void arch_decomp_setup(void)
114 {
115  int port = 0;
116 
117  /*
118  * Initialize the port based on the machine ID from the bootloader.
119  * Note that we're using macros here instead of switch statement
120  * as machine_is functions are optimized out for the boards that
121  * are not selected.
122  */
123  do {
124  /* omap7xx/8xx based boards using UART1 with shift 0 */
125  DEBUG_LL_OMAP7XX(1, herald);
126  DEBUG_LL_OMAP7XX(1, omap_perseus2);
127 
128  /* omap15xx/16xx based boards using UART1 */
129  DEBUG_LL_OMAP1(1, ams_delta);
130  DEBUG_LL_OMAP1(1, nokia770);
131  DEBUG_LL_OMAP1(1, omap_h2);
132  DEBUG_LL_OMAP1(1, omap_h3);
133  DEBUG_LL_OMAP1(1, omap_innovator);
134  DEBUG_LL_OMAP1(1, omap_osk);
135  DEBUG_LL_OMAP1(1, omap_palmte);
136  DEBUG_LL_OMAP1(1, omap_palmz71);
137 
138  /* omap15xx/16xx based boards using UART2 */
139  DEBUG_LL_OMAP1(2, omap_palmtt);
140 
141  /* omap15xx/16xx based boards using UART3 */
142  DEBUG_LL_OMAP1(3, sx1);
143 
144  /* omap2 based boards using UART1 */
145  DEBUG_LL_OMAP2(1, omap_2430sdp);
146  DEBUG_LL_OMAP2(1, omap_apollon);
147  DEBUG_LL_OMAP2(1, omap_h4);
148 
149  /* omap2 based boards using UART3 */
150  DEBUG_LL_OMAP2(3, nokia_n800);
151  DEBUG_LL_OMAP2(3, nokia_n810);
152  DEBUG_LL_OMAP2(3, nokia_n810_wimax);
153 
154  /* omap3 based boards using UART1 */
155  DEBUG_LL_OMAP2(1, omap3evm);
156  DEBUG_LL_OMAP3(1, omap_3430sdp);
157  DEBUG_LL_OMAP3(1, omap_3630sdp);
158  DEBUG_LL_OMAP3(1, omap3530_lv_som);
159  DEBUG_LL_OMAP3(1, omap3_torpedo);
160 
161  /* omap3 based boards using UART3 */
162  DEBUG_LL_OMAP3(3, cm_t35);
163  DEBUG_LL_OMAP3(3, cm_t3517);
164  DEBUG_LL_OMAP3(3, cm_t3730);
165  DEBUG_LL_OMAP3(3, craneboard);
166  DEBUG_LL_OMAP3(3, devkit8000);
167  DEBUG_LL_OMAP3(3, igep0020);
168  DEBUG_LL_OMAP3(3, igep0030);
169  DEBUG_LL_OMAP3(3, nokia_rm680);
170  DEBUG_LL_OMAP3(3, nokia_rm696);
171  DEBUG_LL_OMAP3(3, nokia_rx51);
172  DEBUG_LL_OMAP3(3, omap3517evm);
173  DEBUG_LL_OMAP3(3, omap3_beagle);
174  DEBUG_LL_OMAP3(3, omap3_pandora);
175  DEBUG_LL_OMAP3(3, omap_ldp);
176  DEBUG_LL_OMAP3(3, overo);
177  DEBUG_LL_OMAP3(3, touchbook);
178 
179  /* omap4 based boards using UART3 */
180  DEBUG_LL_OMAP4(3, omap_4430sdp);
181  DEBUG_LL_OMAP4(3, omap4_panda);
182 
183  /* omap5 based boards using UART3 */
184  DEBUG_LL_OMAP5(3, omap5_sevm);
185 
186  /* zoom2/3 external uart */
187  DEBUG_LL_ZOOM(omap_zoom2);
188  DEBUG_LL_ZOOM(omap_zoom3);
189 
190  /* TI8168 base boards using UART3 */
191  DEBUG_LL_TI81XX(3, ti8168evm);
192 
193  /* TI8148 base boards using UART1 */
194  DEBUG_LL_TI81XX(1, ti8148evm);
195 
196  /* AM33XX base boards using UART1 */
197  DEBUG_LL_AM33XX(1, am335xevm);
198  } while (0);
199 }
200 
201 /*
202  * nothing to do
203  */
204 #define arch_decomp_wdog()
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