134 lines
2.7 KiB
C
134 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2022 Linaro Ltd.
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*/
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#include <linux/io.h>
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#include "ipa.h"
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#include "ipa_reg.h"
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/* Is this register valid and defined for the current IPA version? */
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static bool ipa_reg_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
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{
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enum ipa_version version = ipa->version;
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bool valid;
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/* Check for bogus (out of range) register IDs */
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if ((u32)reg_id >= ipa->regs->reg_count)
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return false;
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switch (reg_id) {
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case IPA_BCR:
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case COUNTER_CFG:
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valid = version < IPA_VERSION_4_5;
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break;
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case IPA_TX_CFG:
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case FLAVOR_0:
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case IDLE_INDICATION_CFG:
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valid = version >= IPA_VERSION_3_5;
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break;
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case QTIME_TIMESTAMP_CFG:
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case TIMERS_XO_CLK_DIV_CFG:
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case TIMERS_PULSE_GRAN_CFG:
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valid = version >= IPA_VERSION_4_5;
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break;
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case SRC_RSRC_GRP_45_RSRC_TYPE:
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case DST_RSRC_GRP_45_RSRC_TYPE:
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valid = version <= IPA_VERSION_3_1 ||
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version == IPA_VERSION_4_5;
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break;
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case SRC_RSRC_GRP_67_RSRC_TYPE:
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case DST_RSRC_GRP_67_RSRC_TYPE:
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valid = version <= IPA_VERSION_3_1;
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break;
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case ENDP_FILTER_ROUTER_HSH_CFG:
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valid = version != IPA_VERSION_4_2;
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break;
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case IRQ_SUSPEND_EN:
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case IRQ_SUSPEND_CLR:
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valid = version >= IPA_VERSION_3_1;
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break;
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default:
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valid = true; /* Others should be defined for all versions */
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break;
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}
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/* To be valid, it must be defined */
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return valid && ipa->regs->reg[reg_id];
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}
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const struct ipa_reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
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{
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if (WARN_ON(!ipa_reg_valid(ipa, reg_id)))
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return NULL;
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return ipa->regs->reg[reg_id];
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}
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static const struct ipa_regs *ipa_regs(enum ipa_version version)
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{
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switch (version) {
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case IPA_VERSION_3_1:
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return &ipa_regs_v3_1;
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case IPA_VERSION_3_5_1:
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return &ipa_regs_v3_5_1;
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case IPA_VERSION_4_2:
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return &ipa_regs_v4_2;
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case IPA_VERSION_4_5:
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return &ipa_regs_v4_5;
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case IPA_VERSION_4_9:
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return &ipa_regs_v4_9;
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case IPA_VERSION_4_11:
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return &ipa_regs_v4_11;
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default:
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return NULL;
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}
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}
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int ipa_reg_init(struct ipa *ipa)
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{
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struct device *dev = &ipa->pdev->dev;
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const struct ipa_regs *regs;
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struct resource *res;
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regs = ipa_regs(ipa->version);
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if (!regs)
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return -EINVAL;
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if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
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return -EINVAL;
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/* Setup IPA register memory */
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res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
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"ipa-reg");
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if (!res) {
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dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
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return -ENODEV;
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}
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ipa->reg_virt = ioremap(res->start, resource_size(res));
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if (!ipa->reg_virt) {
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dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
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return -ENOMEM;
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}
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ipa->reg_addr = res->start;
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ipa->regs = regs;
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return 0;
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}
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void ipa_reg_exit(struct ipa *ipa)
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{
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iounmap(ipa->reg_virt);
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}
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