Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Serial port stubs for kernel decompress status messages |
| 3 | * |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 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. |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 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> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 23 | |
Mark A. Greer | 27428e3 | 2009-02-18 14:00:36 -0700 | [diff] [blame] | 24 | #include <asm/mach-types.h> |
| 25 | |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 26 | #include <mach/serial.h> |
Mark A. Greer | 27428e3 | 2009-02-18 14:00:36 -0700 | [diff] [blame] | 27 | |
Rob Herring | 6f6f6a7 | 2012-03-10 10:30:31 -0600 | [diff] [blame] | 28 | #define IOMEM(x) ((void __force __iomem *)(x)) |
| 29 | |
Nicolas Pitre | 8ea0de4 | 2011-04-28 17:00:17 -0400 | [diff] [blame] | 30 | u32 *uart; |
Mark A. Greer | 27428e3 | 2009-02-18 14:00:36 -0700 | [diff] [blame] | 31 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 32 | /* PORT_16C550A, in polled non-fifo mode */ |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 33 | static void putc(char c) |
| 34 | { |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 35 | while (!(uart[UART_LSR] & UART_LSR_THRE)) |
| 36 | barrier(); |
| 37 | uart[UART_TX] = c; |
| 38 | } |
| 39 | |
| 40 | static inline void flush(void) |
| 41 | { |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 42 | while (!(uart[UART_LSR] & UART_LSR_THRE)) |
| 43 | barrier(); |
| 44 | } |
| 45 | |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 46 | static inline void set_uart_info(u32 phys, void * __iomem virt) |
| 47 | { |
Nicolas Pitre | e020fe3 | 2011-09-01 20:32:21 -0400 | [diff] [blame] | 48 | /* |
| 49 | * Get address of some.bss variable and round it down |
| 50 | * a la CONFIG_AUTO_ZRELADDR. |
| 51 | */ |
| 52 | u32 ram_start = (u32)&uart & 0xf8000000; |
| 53 | u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS); |
Nicolas Pitre | 8ea0de4 | 2011-04-28 17:00:17 -0400 | [diff] [blame] | 54 | |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 55 | uart = (u32 *)phys; |
| 56 | uart_info[0] = phys; |
| 57 | uart_info[1] = (u32)virt; |
| 58 | } |
| 59 | |
| 60 | #define _DEBUG_LL_ENTRY(machine, phys, virt) \ |
| 61 | if (machine_is_##machine()) { \ |
| 62 | set_uart_info(phys, virt); \ |
| 63 | break; \ |
| 64 | } |
| 65 | |
| 66 | #define DEBUG_LL_DAVINCI(machine, port) \ |
| 67 | _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \ |
| 68 | IO_ADDRESS(DAVINCI_UART##port##_BASE)) |
| 69 | |
| 70 | #define DEBUG_LL_DA8XX(machine, port) \ |
| 71 | _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \ |
| 72 | IO_ADDRESS(DA8XX_UART##port##_BASE)) |
| 73 | |
Cyril Chemparathy | 38db050 | 2010-05-18 12:51:18 -0400 | [diff] [blame] | 74 | #define DEBUG_LL_TNETV107X(machine, port) \ |
| 75 | _DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \ |
| 76 | TNETV107X_UART##port##_VIRT) |
| 77 | |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 78 | static inline void __arch_decomp_setup(unsigned long arch_id) |
| 79 | { |
| 80 | /* |
| 81 | * Initialize the port based on the machine ID from the bootloader. |
| 82 | * Note that we're using macros here instead of switch statement |
| 83 | * as machine_is functions are optimized out for the boards that |
| 84 | * are not selected. |
| 85 | */ |
| 86 | do { |
| 87 | /* Davinci boards */ |
| 88 | DEBUG_LL_DAVINCI(davinci_evm, 0); |
| 89 | DEBUG_LL_DAVINCI(sffsdr, 0); |
| 90 | DEBUG_LL_DAVINCI(neuros_osd2, 0); |
| 91 | DEBUG_LL_DAVINCI(davinci_dm355_evm, 0); |
| 92 | DEBUG_LL_DAVINCI(dm355_leopard, 0); |
| 93 | DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0); |
| 94 | DEBUG_LL_DAVINCI(davinci_dm365_evm, 0); |
| 95 | |
| 96 | /* DA8xx boards */ |
| 97 | DEBUG_LL_DA8XX(davinci_da830_evm, 2); |
| 98 | DEBUG_LL_DA8XX(davinci_da850_evm, 2); |
Michael Williamson | f2dbb6d | 2010-09-02 13:58:07 -0400 | [diff] [blame] | 99 | DEBUG_LL_DA8XX(mityomapl138, 1); |
Victor Rodriguez | 6c18c91 | 2010-09-23 11:28:40 -0500 | [diff] [blame] | 100 | DEBUG_LL_DA8XX(omapl138_hawkboard, 2); |
Cyril Chemparathy | 38db050 | 2010-05-18 12:51:18 -0400 | [diff] [blame] | 101 | |
| 102 | /* TNETV107x boards */ |
| 103 | DEBUG_LL_TNETV107X(tnetv107x, 1); |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 104 | } while (0); |
| 105 | } |
| 106 | |
| 107 | #define arch_decomp_setup() __arch_decomp_setup(arch_id) |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 108 | #define arch_decomp_wdog() |