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 */ |
Arnd Bergmann | 4d2b7d4 | 2016-02-18 17:36:23 +0100 | [diff] [blame] | 33 | static inline void putc(char c) |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 34 | { |
Sekhar Nori | 09aaf99 | 2012-08-28 14:38:05 +0530 | [diff] [blame] | 35 | if (!uart) |
| 36 | return; |
| 37 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 38 | while (!(uart[UART_LSR] & UART_LSR_THRE)) |
| 39 | barrier(); |
| 40 | uart[UART_TX] = c; |
| 41 | } |
| 42 | |
| 43 | static inline void flush(void) |
| 44 | { |
Sekhar Nori | 09aaf99 | 2012-08-28 14:38:05 +0530 | [diff] [blame] | 45 | if (!uart) |
| 46 | return; |
| 47 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 48 | while (!(uart[UART_LSR] & UART_LSR_THRE)) |
| 49 | barrier(); |
| 50 | } |
| 51 | |
Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 52 | static inline void set_uart_info(u32 phys) |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 53 | { |
| 54 | uart = (u32 *)phys; |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 55 | } |
| 56 | |
Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 57 | #define _DEBUG_LL_ENTRY(machine, phys) \ |
| 58 | { \ |
| 59 | if (machine_is_##machine()) { \ |
| 60 | set_uart_info(phys); \ |
| 61 | break; \ |
| 62 | } \ |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | #define DEBUG_LL_DAVINCI(machine, port) \ |
Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 66 | _DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE) |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 67 | |
| 68 | #define DEBUG_LL_DA8XX(machine, port) \ |
Uwe Kleine-König | 477099f | 2012-03-22 10:29:23 +0100 | [diff] [blame] | 69 | _DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE) |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 70 | |
| 71 | static inline void __arch_decomp_setup(unsigned long arch_id) |
| 72 | { |
| 73 | /* |
| 74 | * Initialize the port based on the machine ID from the bootloader. |
| 75 | * Note that we're using macros here instead of switch statement |
| 76 | * as machine_is functions are optimized out for the boards that |
| 77 | * are not selected. |
| 78 | */ |
| 79 | do { |
| 80 | /* Davinci boards */ |
| 81 | DEBUG_LL_DAVINCI(davinci_evm, 0); |
| 82 | DEBUG_LL_DAVINCI(sffsdr, 0); |
| 83 | DEBUG_LL_DAVINCI(neuros_osd2, 0); |
| 84 | DEBUG_LL_DAVINCI(davinci_dm355_evm, 0); |
| 85 | DEBUG_LL_DAVINCI(dm355_leopard, 0); |
| 86 | DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0); |
| 87 | DEBUG_LL_DAVINCI(davinci_dm365_evm, 0); |
| 88 | |
| 89 | /* DA8xx boards */ |
| 90 | DEBUG_LL_DA8XX(davinci_da830_evm, 2); |
| 91 | DEBUG_LL_DA8XX(davinci_da850_evm, 2); |
Michael Williamson | f2dbb6d | 2010-09-02 13:58:07 -0400 | [diff] [blame] | 92 | DEBUG_LL_DA8XX(mityomapl138, 1); |
Victor Rodriguez | 6c18c91 | 2010-09-23 11:28:40 -0500 | [diff] [blame] | 93 | DEBUG_LL_DA8XX(omapl138_hawkboard, 2); |
Cyril Chemparathy | dc2eb76 | 2010-05-18 12:51:17 -0400 | [diff] [blame] | 94 | } while (0); |
| 95 | } |
| 96 | |
| 97 | #define arch_decomp_setup() __arch_decomp_setup(arch_id) |