root/include/linux/logic_pio.h

INCLUDED FROM

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 HiSilicon Limited, All Rights Reserved.
   4  * Author: Gabriele Paoloni <gabriele.paoloni@huawei.com>
   5  * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
   6  */
   7 
   8 #ifndef __LINUX_LOGIC_PIO_H
   9 #define __LINUX_LOGIC_PIO_H
  10 
  11 #include <linux/fwnode.h>
  12 
  13 enum {
  14         LOGIC_PIO_INDIRECT,             /* Indirect IO flag */
  15         LOGIC_PIO_CPU_MMIO,             /* Memory-mapped IO flag */
  16 };
  17 
  18 struct logic_pio_hwaddr {
  19         struct list_head list;
  20         struct fwnode_handle *fwnode;
  21         resource_size_t hw_start;
  22         resource_size_t io_start;
  23         resource_size_t size; /* range size populated */
  24         unsigned long flags;
  25 
  26         void *hostdata;
  27         const struct logic_pio_host_ops *ops;
  28 };
  29 
  30 struct logic_pio_host_ops {
  31         u32 (*in)(void *hostdata, unsigned long addr, size_t dwidth);
  32         void (*out)(void *hostdata, unsigned long addr, u32 val,
  33                     size_t dwidth);
  34         u32 (*ins)(void *hostdata, unsigned long addr, void *buffer,
  35                    size_t dwidth, unsigned int count);
  36         void (*outs)(void *hostdata, unsigned long addr, const void *buffer,
  37                      size_t dwidth, unsigned int count);
  38 };
  39 
  40 #ifdef CONFIG_INDIRECT_PIO
  41 u8 logic_inb(unsigned long addr);
  42 void logic_outb(u8 value, unsigned long addr);
  43 void logic_outw(u16 value, unsigned long addr);
  44 void logic_outl(u32 value, unsigned long addr);
  45 u16 logic_inw(unsigned long addr);
  46 u32 logic_inl(unsigned long addr);
  47 void logic_outb(u8 value, unsigned long addr);
  48 void logic_outw(u16 value, unsigned long addr);
  49 void logic_outl(u32 value, unsigned long addr);
  50 void logic_insb(unsigned long addr, void *buffer, unsigned int count);
  51 void logic_insl(unsigned long addr, void *buffer, unsigned int count);
  52 void logic_insw(unsigned long addr, void *buffer, unsigned int count);
  53 void logic_outsb(unsigned long addr, const void *buffer, unsigned int count);
  54 void logic_outsw(unsigned long addr, const void *buffer, unsigned int count);
  55 void logic_outsl(unsigned long addr, const void *buffer, unsigned int count);
  56 
  57 #ifndef inb
  58 #define inb logic_inb
  59 #endif
  60 
  61 #ifndef inw
  62 #define inw logic_inw
  63 #endif
  64 
  65 #ifndef inl
  66 #define inl logic_inl
  67 #endif
  68 
  69 #ifndef outb
  70 #define outb logic_outb
  71 #endif
  72 
  73 #ifndef outw
  74 #define outw logic_outw
  75 #endif
  76 
  77 #ifndef outl
  78 #define outl logic_outl
  79 #endif
  80 
  81 #ifndef insb
  82 #define insb logic_insb
  83 #endif
  84 
  85 #ifndef insw
  86 #define insw logic_insw
  87 #endif
  88 
  89 #ifndef insl
  90 #define insl logic_insl
  91 #endif
  92 
  93 #ifndef outsb
  94 #define outsb logic_outsb
  95 #endif
  96 
  97 #ifndef outsw
  98 #define outsw logic_outsw
  99 #endif
 100 
 101 #ifndef outsl
 102 #define outsl logic_outsl
 103 #endif
 104 
 105 /*
 106  * We reserve 0x4000 bytes for Indirect IO as so far this library is only
 107  * used by the HiSilicon LPC Host. If needed, we can reserve a wider IO
 108  * area by redefining the macro below.
 109  */
 110 #define PIO_INDIRECT_SIZE 0x4000
 111 #define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE)
 112 #else
 113 #define MMIO_UPPER_LIMIT IO_SPACE_LIMIT
 114 #endif /* CONFIG_INDIRECT_PIO */
 115 
 116 struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode);
 117 unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode,
 118                         resource_size_t hw_addr, resource_size_t size);
 119 int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
 120 void logic_pio_unregister_range(struct logic_pio_hwaddr *range);
 121 resource_size_t logic_pio_to_hwaddr(unsigned long pio);
 122 unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
 123 
 124 #endif /* __LINUX_LOGIC_PIO_H */