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