1 /* 2 * Copyright © 2015 Broadcom Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #ifndef __BRCMNAND_H__ 15 #define __BRCMNAND_H__ 16 17 #include <linux/types.h> 18 #include <linux/io.h> 19 20 struct platform_device; 21 struct dev_pm_ops; 22 23 struct brcmnand_soc { 24 bool (*ctlrdy_ack)(struct brcmnand_soc *soc); 25 void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en); 26 void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare, 27 bool is_param); 28 }; 29 30 static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc, 31 bool is_param) 32 { 33 if (soc && soc->prepare_data_bus) 34 soc->prepare_data_bus(soc, true, is_param); 35 } 36 37 static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc, 38 bool is_param) 39 { 40 if (soc && soc->prepare_data_bus) 41 soc->prepare_data_bus(soc, false, is_param); 42 } 43 44 static inline u32 brcmnand_readl(void __iomem *addr) 45 { 46 /* 47 * MIPS endianness is configured by boot strap, which also reverses all 48 * bus endianness (i.e., big-endian CPU + big endian bus ==> native 49 * endian I/O). 50 * 51 * Other architectures (e.g., ARM) either do not support big endian, or 52 * else leave I/O in little endian mode. 53 */ 54 if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 55 return __raw_readl(addr); 56 else 57 return readl_relaxed(addr); 58 } 59 60 static inline void brcmnand_writel(u32 val, void __iomem *addr) 61 { 62 /* See brcmnand_readl() comments */ 63 if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) 64 __raw_writel(val, addr); 65 else 66 writel_relaxed(val, addr); 67 } 68 69 int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc); 70 int brcmnand_remove(struct platform_device *pdev); 71 72 extern const struct dev_pm_ops brcmnand_pm_ops; 73 74 #endif /* __BRCMNAND_H__ */ 75