drivers/interconnect/imx/imx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Interconnect framework driver for i.MX SoC
   4  *
   5  * Copyright (c) 2019, BayLibre
   6  * Copyright (c) 2019-2020, NXP
   7  * Author: Alexandre Bailon <abailon@baylibre.com>
   8  * Author: Leonard Crestez <leonard.crestez@nxp.com>
   9  */
  10 #ifndef __DRIVERS_INTERCONNECT_IMX_H
  11 #define __DRIVERS_INTERCONNECT_IMX_H
  12
  13 #include <linux/args.h>
  14 #include <linux/bits.h>
  15 #include <linux/types.h>
  16
  17 #include <linux/interconnect-provider.h>
  18
  19 struct platform_device;
  20
  21 #define IMX_ICC_MAX_LINKS       4
  22
  23 /*
  24  * High throughput priority level in Regulator mode
  25  * Read Priority in Fixed/Limiter mode
  26  */
  27 #define PRIORITY0_SHIFT 0
  28 /*
  29  * Low throughput priority level in Regulator mode
  30  * Write Priority in Fixed/Limiter mode
  31  */
  32 #define PRIORITY1_SHIFT 8
  33 #define PRIORITY_MASK           0x7
  34
  35 #define PRIORITY_COMP_MARK      BIT(31) /* Must set */
  36
  37 #define IMX_NOC_MODE_FIXED              0
  38 #define IMX_NOC_MODE_LIMITER            1
  39 #define IMX_NOC_MODE_BYPASS             2
  40 #define IMX_NOC_MODE_REGULATOR          3
  41 #define IMX_NOC_MODE_UNCONFIGURED       0xFF
  42
  43 #define IMX_NOC_PRIO_REG        0x8
  44 #define IMX_NOC_MODE_REG        0xC
  45 #define IMX_NOC_BANDWIDTH_REG   0x10
  46 #define IMX_NOC_SATURATION      0x14
  47 #define IMX_NOC_EXT_CTL_REG     0x18
  48
  49 struct imx_icc_provider {
  50         void __iomem *noc_base;
  51         struct icc_provider provider;
  52 };
  53
  54 /*
  55  * struct imx_icc_node_adj - Describe a dynamic adjustable node
  56  */
  57 struct imx_icc_node_adj_desc {
  58         unsigned int bw_mul, bw_div;
  59         const char *phandle_name;
  60         bool main_noc;
  61 };
  62
  63 /*
  64  * struct imx_icc_node - Describe an interconnect node
  65  * @name: name of the node
  66  * @id: an unique id to identify the node
  67  * @links: an array of slaves' node id
  68  * @num_links: number of id defined in links
  69  */
  70 struct imx_icc_node_desc {
  71         const char *name;
  72         u16 id;
  73         u16 links[IMX_ICC_MAX_LINKS];
  74         u16 num_links;
  75         const struct imx_icc_node_adj_desc *adj;
  76 };
  77
  78 /*
  79  * struct imx_icc_noc_setting - Describe an interconnect node setting
  80  * @reg: register offset inside the NoC
  81  * @prio_level: priority level
  82  * @mode: functional mode
  83  * @ext_control: external input control
  84  */
  85 struct imx_icc_noc_setting {
  86         u32 reg;
  87         u32 prio_level;
  88         u32 mode;
  89         u32 ext_control;
  90 };
  91
  92 #define DEFINE_BUS_INTERCONNECT(_name, _id, _adj, ...)                  \
  93         {                                                               \
  94                 .id = _id,                                              \
  95                 .name = _name,                                          \
  96                 .adj = _adj,                                            \
  97                 .num_links = COUNT_ARGS(__VA_ARGS__),                   \
  98                 .links = { __VA_ARGS__ },                               \
  99         }
 100
 101 #define DEFINE_BUS_MASTER(_name, _id, _dest_id)                         \
 102         DEFINE_BUS_INTERCONNECT(_name, _id, NULL, _dest_id)
 103
 104 #define DEFINE_BUS_SLAVE(_name, _id, _adj)                              \
 105         DEFINE_BUS_INTERCONNECT(_name, _id, _adj)
 106
 107 int imx_icc_register(struct platform_device *pdev,
 108                      struct imx_icc_node_desc *nodes,
 109                      int nodes_count,
 110                      struct imx_icc_noc_setting *noc_settings);
 111 void imx_icc_unregister(struct platform_device *pdev);
 112
 113 #endif /* __DRIVERS_INTERCONNECT_IMX_H */