1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2020 Linaro Ltd.
12 /* Is this register valid and defined for the current IPA version? */
13 static bool ipa_reg_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
15 enum ipa_version version = ipa->version;
18 /* Check for bogus (out of range) register IDs */
19 if ((u32)reg_id >= ipa->regs->reg_count)
25 valid = version < IPA_VERSION_4_5;
30 case IDLE_INDICATION_CFG:
31 valid = version >= IPA_VERSION_3_5;
34 case QTIME_TIMESTAMP_CFG:
35 case TIMERS_XO_CLK_DIV_CFG:
36 case TIMERS_PULSE_GRAN_CFG:
37 valid = version >= IPA_VERSION_4_5;
40 case SRC_RSRC_GRP_45_RSRC_TYPE:
41 case DST_RSRC_GRP_45_RSRC_TYPE:
42 valid = version <= IPA_VERSION_3_1 ||
43 version == IPA_VERSION_4_5;
46 case SRC_RSRC_GRP_67_RSRC_TYPE:
47 case DST_RSRC_GRP_67_RSRC_TYPE:
48 valid = version <= IPA_VERSION_3_1;
51 case ENDP_FILTER_ROUTER_HSH_CFG:
52 valid = version != IPA_VERSION_4_2;
57 valid = version >= IPA_VERSION_3_1;
61 valid = true; /* Others should be defined for all versions */
65 /* To be valid, it must be defined */
67 return valid && ipa->regs->reg[reg_id];
70 /* Assumes the endpoint transfer direction is valid; 0 is a bad offset */
71 u32 __ipa_reg_offset(struct ipa *ipa, enum ipa_reg_id reg_id, u32 n)
73 const struct ipa_reg *reg;
75 if (WARN_ON(!ipa_reg_valid(ipa, reg_id)))
78 reg = ipa->regs->reg[reg_id];
80 return reg->offset + n * reg->stride;
83 static const struct ipa_regs *ipa_regs(enum ipa_version version)
87 return &ipa_regs_v3_1;
88 case IPA_VERSION_3_5_1:
89 return &ipa_regs_v3_5_1;
91 return &ipa_regs_v4_2;
93 return &ipa_regs_v4_5;
95 return &ipa_regs_v4_9;
96 case IPA_VERSION_4_11:
97 return &ipa_regs_v4_11;
103 int ipa_reg_init(struct ipa *ipa)
105 struct device *dev = &ipa->pdev->dev;
106 const struct ipa_regs *regs;
107 struct resource *res;
109 regs = ipa_regs(ipa->version);
113 if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
116 /* Setup IPA register memory */
117 res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
120 dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
124 ipa->reg_virt = ioremap(res->start, resource_size(res));
125 if (!ipa->reg_virt) {
126 dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
129 ipa->reg_addr = res->start;
135 void ipa_reg_exit(struct ipa *ipa)
137 iounmap(ipa->reg_virt);