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Russell Kinga09e64f2008-08-05 16:14:15 +01001/*
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>
Tony Lindgren0c8219f2010-02-15 08:49:01 -080022
Tony Lindgren96554d72010-04-30 17:39:19 -070023#include <asm/memory.h>
Tony Lindgren0c8219f2010-02-15 08:49:01 -080024#include <asm/mach-types.h>
25
Tony Lindgrence491cf2009-10-20 09:40:47 -070026#include <plat/serial.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010027
Tony Lindgren35ddf7c2010-08-02 14:21:39 +030028#define MDR1_MODE_MASK 0x07
29
Tony Lindgren0c8219f2010-02-15 08:49:01 -080030static volatile u8 *uart_base;
31static int uart_shift;
32
33/*
Tony Lindgren96554d72010-04-30 17:39:19 -070034 * Store the DEBUG_LL uart number into memory.
Tony Lindgren0c8219f2010-02-15 08:49:01 -080035 * See also debug-macro.S, and serial.c for related code.
Tony Lindgren0c8219f2010-02-15 08:49:01 -080036 */
Tony Lindgren96554d72010-04-30 17:39:19 -070037static void set_omap_uart_info(unsigned char port)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080038{
Tony Lindgren96554d72010-04-30 17:39:19 -070039 *(volatile u32 *)OMAP_UART_INFO = port;
Tony Lindgren0c8219f2010-02-15 08:49:01 -080040}
Russell Kinga09e64f2008-08-05 16:14:15 +010041
42static void putc(int c)
43{
Tony Lindgren0c8219f2010-02-15 08:49:01 -080044 if (!uart_base)
Russell Kinga09e64f2008-08-05 16:14:15 +010045 return;
Russell Kinga09e64f2008-08-05 16:14:15 +010046
Tony Lindgren35ddf7c2010-08-02 14:21:39 +030047 /* Check for UART 16x mode */
48 if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
49 return;
50
Tony Lindgren0c8219f2010-02-15 08:49:01 -080051 while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
Russell Kinga09e64f2008-08-05 16:14:15 +010052 barrier();
Tony Lindgren0c8219f2010-02-15 08:49:01 -080053 uart_base[UART_TX << uart_shift] = c;
Russell Kinga09e64f2008-08-05 16:14:15 +010054}
55
56static inline void flush(void)
57{
58}
59
60/*
Tony Lindgren0c8219f2010-02-15 08:49:01 -080061 * Macros to configure UART1 and debug UART
62 */
Tony Lindgren96554d72010-04-30 17:39:19 -070063#define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id) \
Tony Lindgren0c8219f2010-02-15 08:49:01 -080064 if (machine_is_##mach()) { \
Tony Lindgren0c8219f2010-02-15 08:49:01 -080065 uart_base = (volatile u8 *)(dbg_uart); \
66 uart_shift = (dbg_shft); \
67 port = (dbg_id); \
Tony Lindgren96554d72010-04-30 17:39:19 -070068 set_omap_uart_info(port); \
Tony Lindgren0c8219f2010-02-15 08:49:01 -080069 break; \
70 }
71
72#define DEBUG_LL_OMAP7XX(p, mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070073 _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
74 OMAP1UART##p)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080075
76#define DEBUG_LL_OMAP1(p, mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070077 _DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT, \
78 OMAP1UART##p)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080079
80#define DEBUG_LL_OMAP2(p, mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070081 _DEBUG_LL_ENTRY(mach, OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT, \
82 OMAP2UART##p)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080083
84#define DEBUG_LL_OMAP3(p, mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070085 _DEBUG_LL_ENTRY(mach, OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT, \
86 OMAP3UART##p)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080087
88#define DEBUG_LL_OMAP4(p, mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070089 _DEBUG_LL_ENTRY(mach, OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT, \
90 OMAP4UART##p)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080091
92/* Zoom2/3 shift is different for UART1 and external port */
93#define DEBUG_LL_ZOOM(mach) \
Tony Lindgren96554d72010-04-30 17:39:19 -070094 _DEBUG_LL_ENTRY(mach, ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
Tony Lindgren0c8219f2010-02-15 08:49:01 -080095
96static 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
143 /* omap3 based boards using UART3 */
144 DEBUG_LL_OMAP3(3, cm_t35);
145 DEBUG_LL_OMAP3(3, igep0020);
146 DEBUG_LL_OMAP3(3, nokia_rx51);
147 DEBUG_LL_OMAP3(3, omap3517evm);
148 DEBUG_LL_OMAP3(3, omap3_beagle);
149 DEBUG_LL_OMAP3(3, omap3_pandora);
150 DEBUG_LL_OMAP3(3, omap_ldp);
151 DEBUG_LL_OMAP3(3, overo);
152 DEBUG_LL_OMAP3(3, touchbook);
153
154 /* omap4 based boards using UART3 */
155 DEBUG_LL_OMAP4(3, omap_4430sdp);
156
157 /* zoom2/3 external uart */
158 DEBUG_LL_ZOOM(omap_zoom2);
159 DEBUG_LL_ZOOM(omap_zoom3);
160
161 } while (0);
162}
163
164#define arch_decomp_setup() __arch_decomp_setup(arch_id)
165
166/*
Russell Kinga09e64f2008-08-05 16:14:15 +0100167 * nothing to do
168 */
Russell Kinga09e64f2008-08-05 16:14:15 +0100169#define arch_decomp_wdog()