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 static u32 *uart;
29 static u32 *uart_info = (u32 *)(DAVINCI_UART_INFO);
30
31 /* PORT_16C550A, in polled non-fifo mode */
putc(char c)32 static void putc(char c)
33 {
34 while (!(uart[UART_LSR] & UART_LSR_THRE))
35 barrier();
36 uart[UART_TX] = c;
37 }
38
flush(void)39 static inline void flush(void)
40 {
41 while (!(uart[UART_LSR] & UART_LSR_THRE))
42 barrier();
43 }
44
set_uart_info(u32 phys,void * __iomem virt)45 static inline void set_uart_info(u32 phys, void * __iomem virt)
46 {
47 uart = (u32 *)phys;
48 uart_info[0] = phys;
49 uart_info[1] = (u32)virt;
50 }
51
52 #define _DEBUG_LL_ENTRY(machine, phys, virt) \
53 if (machine_is_##machine()) { \
54 set_uart_info(phys, virt); \
55 break; \
56 }
57
58 #define DEBUG_LL_DAVINCI(machine, port) \
59 _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \
60 IO_ADDRESS(DAVINCI_UART##port##_BASE))
61
62 #define DEBUG_LL_DA8XX(machine, port) \
63 _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \
64 IO_ADDRESS(DA8XX_UART##port##_BASE))
65
66 #define DEBUG_LL_TNETV107X(machine, port) \
67 _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \
68 TNETV107X_UART##port##_VIRT)
69
__arch_decomp_setup(unsigned long arch_id)70 static inline void __arch_decomp_setup(unsigned long arch_id)
71 {
72 /*
73 * Initialize the port based on the machine ID from the bootloader.
74 * Note that we're using macros here instead of switch statement
75 * as machine_is functions are optimized out for the boards that
76 * are not selected.
77 */
78 do {
79 /* Davinci boards */
80 DEBUG_LL_DAVINCI(davinci_evm, 0);
81 DEBUG_LL_DAVINCI(sffsdr, 0);
82 DEBUG_LL_DAVINCI(neuros_osd2, 0);
83 DEBUG_LL_DAVINCI(davinci_dm355_evm, 0);
84 DEBUG_LL_DAVINCI(dm355_leopard, 0);
85 DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0);
86 DEBUG_LL_DAVINCI(davinci_dm365_evm, 0);
87
88 /* DA8xx boards */
89 DEBUG_LL_DA8XX(davinci_da830_evm, 2);
90 DEBUG_LL_DA8XX(davinci_da850_evm, 2);
91 DEBUG_LL_DA8XX(mityomapl138, 1);
92 DEBUG_LL_DA8XX(omapl138_hawkboard, 2);
93
94 /* TNETV107x boards */
95 DEBUG_LL_TNETV107X(tnetv107x, 1);
96 } while (0);
97 }
98
99 #define arch_decomp_setup() __arch_decomp_setup(arch_id)
100 #define arch_decomp_wdog()
101