1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2022 Linaro Ltd.
5 */
6
7 #include <linux/io.h>
8
9 #include "ipa.h"
10 #include "ipa_reg.h"
11
12 /* Is this register ID valid for the current IPA version? */
ipa_reg_id_valid(struct ipa * ipa,enum ipa_reg_id reg_id)13 static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
14 {
15 enum ipa_version version = ipa->version;
16
17 switch (reg_id) {
18 case IPA_BCR:
19 case COUNTER_CFG:
20 return version < IPA_VERSION_4_5;
21
22 case IPA_TX_CFG:
23 case FLAVOR_0:
24 case IDLE_INDICATION_CFG:
25 return version >= IPA_VERSION_3_5;
26
27 case QTIME_TIMESTAMP_CFG:
28 case TIMERS_XO_CLK_DIV_CFG:
29 case TIMERS_PULSE_GRAN_CFG:
30 return version >= IPA_VERSION_4_5;
31
32 case SRC_RSRC_GRP_45_RSRC_TYPE:
33 case DST_RSRC_GRP_45_RSRC_TYPE:
34 return version <= IPA_VERSION_3_1 ||
35 version == IPA_VERSION_4_5;
36
37 case SRC_RSRC_GRP_67_RSRC_TYPE:
38 case DST_RSRC_GRP_67_RSRC_TYPE:
39 return version <= IPA_VERSION_3_1;
40
41 case ENDP_FILTER_ROUTER_HSH_CFG:
42 return version != IPA_VERSION_4_2;
43
44 case IRQ_SUSPEND_EN:
45 case IRQ_SUSPEND_CLR:
46 return version >= IPA_VERSION_3_1;
47
48 case COMP_CFG:
49 case CLKON_CFG:
50 case ROUTE:
51 case SHARED_MEM_SIZE:
52 case QSB_MAX_WRITES:
53 case QSB_MAX_READS:
54 case FILT_ROUT_HASH_EN:
55 case FILT_ROUT_CACHE_CFG:
56 case FILT_ROUT_HASH_FLUSH:
57 case FILT_ROUT_CACHE_FLUSH:
58 case STATE_AGGR_ACTIVE:
59 case LOCAL_PKT_PROC_CNTXT:
60 case AGGR_FORCE_CLOSE:
61 case SRC_RSRC_GRP_01_RSRC_TYPE:
62 case SRC_RSRC_GRP_23_RSRC_TYPE:
63 case DST_RSRC_GRP_01_RSRC_TYPE:
64 case DST_RSRC_GRP_23_RSRC_TYPE:
65 case ENDP_INIT_CTRL:
66 case ENDP_INIT_CFG:
67 case ENDP_INIT_NAT:
68 case ENDP_INIT_HDR:
69 case ENDP_INIT_HDR_EXT:
70 case ENDP_INIT_HDR_METADATA_MASK:
71 case ENDP_INIT_MODE:
72 case ENDP_INIT_AGGR:
73 case ENDP_INIT_HOL_BLOCK_EN:
74 case ENDP_INIT_HOL_BLOCK_TIMER:
75 case ENDP_INIT_DEAGGR:
76 case ENDP_INIT_RSRC_GRP:
77 case ENDP_INIT_SEQ:
78 case ENDP_STATUS:
79 case ENDP_FILTER_CACHE_CFG:
80 case ENDP_ROUTER_CACHE_CFG:
81 case IPA_IRQ_STTS:
82 case IPA_IRQ_EN:
83 case IPA_IRQ_CLR:
84 case IPA_IRQ_UC:
85 case IRQ_SUSPEND_INFO:
86 return true; /* These should be defined for all versions */
87
88 default:
89 return false;
90 }
91 }
92
ipa_reg(struct ipa * ipa,enum ipa_reg_id reg_id)93 const struct reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
94 {
95 if (WARN(!ipa_reg_id_valid(ipa, reg_id), "invalid reg %u\n", reg_id))
96 return NULL;
97
98 return reg(ipa->regs, reg_id);
99 }
100
ipa_regs(enum ipa_version version)101 static const struct regs *ipa_regs(enum ipa_version version)
102 {
103 switch (version) {
104 case IPA_VERSION_3_1:
105 return &ipa_regs_v3_1;
106 case IPA_VERSION_3_5_1:
107 return &ipa_regs_v3_5_1;
108 case IPA_VERSION_4_2:
109 return &ipa_regs_v4_2;
110 case IPA_VERSION_4_5:
111 return &ipa_regs_v4_5;
112 case IPA_VERSION_4_7:
113 return &ipa_regs_v4_7;
114 case IPA_VERSION_4_9:
115 return &ipa_regs_v4_9;
116 case IPA_VERSION_4_11:
117 return &ipa_regs_v4_11;
118 default:
119 return NULL;
120 }
121 }
122
ipa_reg_init(struct ipa * ipa)123 int ipa_reg_init(struct ipa *ipa)
124 {
125 struct device *dev = &ipa->pdev->dev;
126 const struct regs *regs;
127 struct resource *res;
128
129 regs = ipa_regs(ipa->version);
130 if (!regs)
131 return -EINVAL;
132
133 if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
134 return -EINVAL;
135
136 /* Setup IPA register memory */
137 res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
138 "ipa-reg");
139 if (!res) {
140 dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
141 return -ENODEV;
142 }
143
144 ipa->reg_virt = ioremap(res->start, resource_size(res));
145 if (!ipa->reg_virt) {
146 dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
147 return -ENOMEM;
148 }
149 ipa->regs = regs;
150
151 return 0;
152 }
153
ipa_reg_exit(struct ipa * ipa)154 void ipa_reg_exit(struct ipa *ipa)
155 {
156 iounmap(ipa->reg_virt);
157 }
158