| 1 | /* |
| 2 | * Atheros AR934X SoCs built-in NAND flash controller support |
| 3 | * |
| 4 | * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/delay.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/dma-mapping.h> |
| 16 | #include <linux/etherdevice.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/platform/ar934x_nfc.h> |
| 19 | |
| 20 | #include <asm/mach-ath79/ath79.h> |
| 21 | #include <asm/mach-ath79/ar71xx_regs.h> |
| 22 | |
| 23 | #include "dev-nfc.h" |
| 24 | |
| 25 | static struct resource ath79_nfc_resources[2]; |
| 26 | static u64 ar934x_nfc_dmamask = DMA_BIT_MASK(32); |
| 27 | static struct ar934x_nfc_platform_data ath79_nfc_data; |
| 28 | |
| 29 | static struct platform_device ath79_nfc_device = { |
| 30 | .name = AR934X_NFC_DRIVER_NAME, |
| 31 | .id = -1, |
| 32 | .resource = ath79_nfc_resources, |
| 33 | .num_resources = ARRAY_SIZE(ath79_nfc_resources), |
| 34 | .dev = { |
| 35 | .dma_mask = &ar934x_nfc_dmamask, |
| 36 | .coherent_dma_mask = DMA_BIT_MASK(32), |
| 37 | .platform_data = &ath79_nfc_data, |
| 38 | }, |
| 39 | }; |
| 40 | |
| 41 | static void ar934x_nfc_hw_reset(bool active) |
| 42 | { |
| 43 | if (active) { |
| 44 | ath79_device_reset_set(AR934X_RESET_NANDF); |
| 45 | udelay(100); |
| 46 | |
| 47 | ath79_device_reset_set(AR934X_RESET_ETH_SWITCH_ANALOG); |
| 48 | udelay(250); |
| 49 | } else { |
| 50 | ath79_device_reset_clear(AR934X_RESET_ETH_SWITCH_ANALOG); |
| 51 | udelay(250); |
| 52 | |
| 53 | ath79_device_reset_clear(AR934X_RESET_NANDF); |
| 54 | udelay(100); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | static void ar934x_nfc_setup(void) |
| 59 | { |
| 60 | ath79_nfc_resources[0].start = AR934X_NFC_BASE; |
| 61 | ath79_nfc_resources[0].end = AR934X_NFC_BASE + AR934X_NFC_SIZE - 1; |
| 62 | ath79_nfc_resources[0].flags = IORESOURCE_MEM; |
| 63 | |
| 64 | ath79_nfc_resources[1].start = ATH79_MISC_IRQ(21); |
| 65 | ath79_nfc_resources[1].end = ATH79_MISC_IRQ(21); |
| 66 | ath79_nfc_resources[1].flags = IORESOURCE_IRQ; |
| 67 | |
| 68 | ath79_nfc_data.hw_reset = ar934x_nfc_hw_reset; |
| 69 | |
| 70 | platform_device_register(&ath79_nfc_device); |
| 71 | } |
| 72 | |
| 73 | void __init ath79_nfc_set_select_chip(void (*f)(int chip_no)) |
| 74 | { |
| 75 | ath79_nfc_data.select_chip = f; |
| 76 | } |
| 77 | |
| 78 | void __init ath79_nfc_set_scan_fixup(int (*f)(struct mtd_info *mtd)) |
| 79 | { |
| 80 | ath79_nfc_data.scan_fixup = f; |
| 81 | } |
| 82 | |
| 83 | void __init ath79_nfc_set_swap_dma(bool enable) |
| 84 | { |
| 85 | ath79_nfc_data.swap_dma = enable; |
| 86 | } |
| 87 | |
| 88 | void __init ath79_nfc_set_parts(struct mtd_partition *parts, int nr_parts) |
| 89 | { |
| 90 | ath79_nfc_data.parts = parts; |
| 91 | ath79_nfc_data.nr_parts = nr_parts; |
| 92 | } |
| 93 | |
| 94 | void __init ath79_register_nfc(void) |
| 95 | { |
| 96 | if (soc_is_ar934x()) |
| 97 | ar934x_nfc_setup(); |
| 98 | else |
| 99 | BUG(); |
| 100 | } |
| 101 | |
