projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| fc982e1c KW |
2 | /* |
| 3 | * arch/arm/mach-lpc32xx/common.c | |
| 4 | * | |
| 5 | * Author: Kevin Wells <kevin.wells@nxp.com> | |
| 6 | * | |
| 7 | * Copyright (C) 2010 NXP Semiconductors | |
| fc982e1c KW |
8 | */ |
| 9 | ||
| 10 | #include <linux/init.h> | |
| fc982e1c KW |
11 | |
| 12 | #include <asm/mach/map.h> | |
| e39942f5 | 13 | #include <asm/system_info.h> |
| fc982e1c | 14 | |
| fc982e1c KW |
15 | #include <mach/hardware.h> |
| 16 | #include <mach/platform.h> | |
| 17 | #include "common.h" | |
| 18 | ||
| fc982e1c KW |
19 | /* |
| 20 | * Returns the unique ID for the device | |
| 21 | */ | |
| 22 | void lpc32xx_get_uid(u32 devid[4]) | |
| 23 | { | |
| 24 | int i; | |
| 25 | ||
| 26 | for (i = 0; i < 4; i++) | |
| 27 | devid[i] = __raw_readl(LPC32XX_CLKPWR_DEVID(i << 2)); | |
| 28 | } | |
| 29 | ||
| fc982e1c KW |
30 | /* |
| 31 | * Detects and returns IRAM size for the device variation | |
| 32 | */ | |
| 33 | #define LPC32XX_IRAM_BANK_SIZE SZ_128K | |
| 34 | static u32 iram_size; | |
| 35 | u32 lpc32xx_return_iram_size(void) | |
| 36 | { | |
| 37 | if (iram_size == 0) { | |
| 38 | u32 savedval1, savedval2; | |
| 39 | void __iomem *iramptr1, *iramptr2; | |
| 40 | ||
| 41 | iramptr1 = io_p2v(LPC32XX_IRAM_BASE); | |
| 42 | iramptr2 = io_p2v(LPC32XX_IRAM_BASE + LPC32XX_IRAM_BANK_SIZE); | |
| 43 | savedval1 = __raw_readl(iramptr1); | |
| 44 | savedval2 = __raw_readl(iramptr2); | |
| 45 | ||
| 46 | if (savedval1 == savedval2) { | |
| 47 | __raw_writel(savedval2 + 1, iramptr2); | |
| 48 | if (__raw_readl(iramptr1) == savedval2 + 1) | |
| 49 | iram_size = LPC32XX_IRAM_BANK_SIZE; | |
| 50 | else | |
| 51 | iram_size = LPC32XX_IRAM_BANK_SIZE * 2; | |
| 52 | __raw_writel(savedval2, iramptr2); | |
| 53 | } else | |
| 54 | iram_size = LPC32XX_IRAM_BANK_SIZE * 2; | |
| 55 | } | |
| 56 | ||
| 57 | return iram_size; | |
| 58 | } | |
| 22833d55 | 59 | EXPORT_SYMBOL_GPL(lpc32xx_return_iram_size); |
| fc982e1c | 60 | |
| fc982e1c KW |
61 | static struct map_desc lpc32xx_io_desc[] __initdata = { |
| 62 | { | |
| df38b24f | 63 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START), |
| fc982e1c KW |
64 | .pfn = __phys_to_pfn(LPC32XX_AHB0_START), |
| 65 | .length = LPC32XX_AHB0_SIZE, | |
| 66 | .type = MT_DEVICE | |
| 67 | }, | |
| 68 | { | |
| df38b24f | 69 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START), |
| fc982e1c KW |
70 | .pfn = __phys_to_pfn(LPC32XX_AHB1_START), |
| 71 | .length = LPC32XX_AHB1_SIZE, | |
| 72 | .type = MT_DEVICE | |
| 73 | }, | |
| 74 | { | |
| df38b24f | 75 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START), |
| fc982e1c KW |
76 | .pfn = __phys_to_pfn(LPC32XX_FABAPB_START), |
| 77 | .length = LPC32XX_FABAPB_SIZE, | |
| 78 | .type = MT_DEVICE | |
| 79 | }, | |
| 80 | { | |
| df38b24f | 81 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE), |
| fc982e1c KW |
82 | .pfn = __phys_to_pfn(LPC32XX_IRAM_BASE), |
| 83 | .length = (LPC32XX_IRAM_BANK_SIZE * 2), | |
| 84 | .type = MT_DEVICE | |
| 85 | }, | |
| 86 | }; | |
| 87 | ||
| 88 | void __init lpc32xx_map_io(void) | |
| 89 | { | |
| 90 | iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc)); | |
| 91 | } | |
| b23fcd90 | 92 | |
| e39942f5 | 93 | static int __init lpc32xx_check_uid(void) |
| be20dbc8 RS |
94 | { |
| 95 | u32 uid[4]; | |
| 96 | ||
| 97 | lpc32xx_get_uid(uid); | |
| 98 | ||
| 99 | printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n", | |
| 100 | uid[3], uid[2], uid[1], uid[0]); | |
| 101 | ||
| e39942f5 APS |
102 | if (!system_serial_low && !system_serial_high) { |
| 103 | system_serial_low = uid[0]; | |
| 104 | system_serial_high = uid[1]; | |
| 105 | } | |
| 106 | ||
| be20dbc8 RS |
107 | return 1; |
| 108 | } | |
| e39942f5 | 109 | arch_initcall(lpc32xx_check_uid); |