Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 2 | /* |
| 3 | * arch/arm/mach-lpc32xx/common.c |
| 4 | * |
| 5 | * Author: Kevin Wells <kevin.wells@nxp.com> |
| 6 | * |
| 7 | * Copyright (C) 2010 NXP Semiconductors |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/init.h> |
Arnd Bergmann | 9dc03ff | 2019-08-09 16:40:32 +0200 | [diff] [blame] | 11 | #include <linux/soc/nxp/lpc32xx-misc.h> |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 12 | |
| 13 | #include <asm/mach/map.h> |
Alexandre Pereira da Silva | e39942f | 2012-07-20 14:01:51 +0200 | [diff] [blame] | 14 | #include <asm/system_info.h> |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 15 | |
Arnd Bergmann | d353291 | 2019-08-09 16:40:38 +0200 | [diff] [blame] | 16 | #include "lpc32xx.h" |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 17 | #include "common.h" |
| 18 | |
| 19 | /* |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 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 | |
| 30 | /* |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 31 | * Detects and returns IRAM size for the device variation |
| 32 | */ |
| 33 | #define LPC32XX_IRAM_BANK_SIZE SZ_128K |
| 34 | static u32 iram_size; |
Arnd Bergmann | 9dc03ff | 2019-08-09 16:40:32 +0200 | [diff] [blame] | 35 | u32 lpc32xx_return_iram(void __iomem **mapbase, dma_addr_t *dmaaddr) |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 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 | } |
Arnd Bergmann | 9dc03ff | 2019-08-09 16:40:32 +0200 | [diff] [blame] | 56 | if (dmaaddr) |
| 57 | *dmaaddr = LPC32XX_IRAM_BASE; |
| 58 | if (mapbase) |
| 59 | *mapbase = io_p2v(LPC32XX_IRAM_BASE); |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 60 | |
| 61 | return iram_size; |
| 62 | } |
Arnd Bergmann | 9dc03ff | 2019-08-09 16:40:32 +0200 | [diff] [blame] | 63 | EXPORT_SYMBOL_GPL(lpc32xx_return_iram); |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 64 | |
Arnd Bergmann | ecca1a6 | 2019-08-09 16:40:33 +0200 | [diff] [blame] | 65 | void lpc32xx_set_phy_interface_mode(phy_interface_t mode) |
| 66 | { |
| 67 | u32 tmp = __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL); |
| 68 | tmp &= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK; |
| 69 | if (mode == PHY_INTERFACE_MODE_MII) |
| 70 | tmp |= LPC32XX_CLKPWR_MACCTRL_USE_MII_PINS; |
| 71 | else |
| 72 | tmp |= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS; |
| 73 | __raw_writel(tmp, LPC32XX_CLKPWR_MACCLK_CTRL); |
| 74 | } |
| 75 | EXPORT_SYMBOL_GPL(lpc32xx_set_phy_interface_mode); |
| 76 | |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 77 | static struct map_desc lpc32xx_io_desc[] __initdata = { |
| 78 | { |
Arnd Bergmann | df38b24 | 2012-09-14 20:20:24 +0000 | [diff] [blame] | 79 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START), |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 80 | .pfn = __phys_to_pfn(LPC32XX_AHB0_START), |
| 81 | .length = LPC32XX_AHB0_SIZE, |
| 82 | .type = MT_DEVICE |
| 83 | }, |
| 84 | { |
Arnd Bergmann | df38b24 | 2012-09-14 20:20:24 +0000 | [diff] [blame] | 85 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START), |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 86 | .pfn = __phys_to_pfn(LPC32XX_AHB1_START), |
| 87 | .length = LPC32XX_AHB1_SIZE, |
| 88 | .type = MT_DEVICE |
| 89 | }, |
| 90 | { |
Arnd Bergmann | df38b24 | 2012-09-14 20:20:24 +0000 | [diff] [blame] | 91 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START), |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 92 | .pfn = __phys_to_pfn(LPC32XX_FABAPB_START), |
| 93 | .length = LPC32XX_FABAPB_SIZE, |
| 94 | .type = MT_DEVICE |
| 95 | }, |
| 96 | { |
Arnd Bergmann | df38b24 | 2012-09-14 20:20:24 +0000 | [diff] [blame] | 97 | .virtual = (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE), |
Kevin Wells | fc982e1 | 2010-07-27 08:42:46 -0700 | [diff] [blame] | 98 | .pfn = __phys_to_pfn(LPC32XX_IRAM_BASE), |
| 99 | .length = (LPC32XX_IRAM_BANK_SIZE * 2), |
| 100 | .type = MT_DEVICE |
| 101 | }, |
| 102 | }; |
| 103 | |
| 104 | void __init lpc32xx_map_io(void) |
| 105 | { |
| 106 | iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc)); |
| 107 | } |
Russell King | b23fcd9 | 2011-11-05 12:17:40 +0000 | [diff] [blame] | 108 | |
Alexandre Pereira da Silva | e39942f | 2012-07-20 14:01:51 +0200 | [diff] [blame] | 109 | static int __init lpc32xx_check_uid(void) |
Roland Stigge | be20dbc | 2012-04-22 12:01:19 +0200 | [diff] [blame] | 110 | { |
| 111 | u32 uid[4]; |
| 112 | |
| 113 | lpc32xx_get_uid(uid); |
| 114 | |
| 115 | printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n", |
| 116 | uid[3], uid[2], uid[1], uid[0]); |
| 117 | |
Alexandre Pereira da Silva | e39942f | 2012-07-20 14:01:51 +0200 | [diff] [blame] | 118 | if (!system_serial_low && !system_serial_high) { |
| 119 | system_serial_low = uid[0]; |
| 120 | system_serial_high = uid[1]; |
| 121 | } |
| 122 | |
Roland Stigge | be20dbc | 2012-04-22 12:01:19 +0200 | [diff] [blame] | 123 | return 1; |
| 124 | } |
Alexandre Pereira da Silva | e39942f | 2012-07-20 14:01:51 +0200 | [diff] [blame] | 125 | arch_initcall(lpc32xx_check_uid); |