162 lines
3.4 KiB
C
162 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) 2023 Linaro Ltd. */
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include "gsi.h"
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#include "reg.h"
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#include "gsi_reg.h"
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/* Is this register ID valid for the current GSI version? */
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static bool gsi_reg_id_valid(struct gsi *gsi, enum gsi_reg_id reg_id)
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{
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switch (reg_id) {
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case INTER_EE_SRC_CH_IRQ_MSK:
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case INTER_EE_SRC_EV_CH_IRQ_MSK:
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return gsi->version >= IPA_VERSION_3_5;
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case HW_PARAM_2:
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return gsi->version >= IPA_VERSION_3_5_1;
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case HW_PARAM_4:
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return gsi->version >= IPA_VERSION_5_0;
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case CH_C_CNTXT_0:
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case CH_C_CNTXT_1:
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case CH_C_CNTXT_2:
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case CH_C_CNTXT_3:
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case CH_C_QOS:
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case CH_C_SCRATCH_0:
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case CH_C_SCRATCH_1:
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case CH_C_SCRATCH_2:
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case CH_C_SCRATCH_3:
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case EV_CH_E_CNTXT_0:
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case EV_CH_E_CNTXT_1:
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case EV_CH_E_CNTXT_2:
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case EV_CH_E_CNTXT_3:
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case EV_CH_E_CNTXT_4:
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case EV_CH_E_CNTXT_8:
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case EV_CH_E_CNTXT_9:
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case EV_CH_E_CNTXT_10:
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case EV_CH_E_CNTXT_11:
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case EV_CH_E_CNTXT_12:
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case EV_CH_E_CNTXT_13:
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case EV_CH_E_SCRATCH_0:
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case EV_CH_E_SCRATCH_1:
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case CH_C_DOORBELL_0:
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case EV_CH_E_DOORBELL_0:
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case GSI_STATUS:
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case CH_CMD:
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case EV_CH_CMD:
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case GENERIC_CMD:
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case CNTXT_TYPE_IRQ:
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case CNTXT_TYPE_IRQ_MSK:
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case CNTXT_SRC_CH_IRQ:
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case CNTXT_SRC_CH_IRQ_MSK:
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case CNTXT_SRC_CH_IRQ_CLR:
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case CNTXT_SRC_EV_CH_IRQ:
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case CNTXT_SRC_EV_CH_IRQ_MSK:
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case CNTXT_SRC_EV_CH_IRQ_CLR:
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case CNTXT_SRC_IEOB_IRQ:
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case CNTXT_SRC_IEOB_IRQ_MSK:
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case CNTXT_SRC_IEOB_IRQ_CLR:
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case CNTXT_GLOB_IRQ_STTS:
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case CNTXT_GLOB_IRQ_EN:
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case CNTXT_GLOB_IRQ_CLR:
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case CNTXT_GSI_IRQ_STTS:
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case CNTXT_GSI_IRQ_EN:
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case CNTXT_GSI_IRQ_CLR:
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case CNTXT_INTSET:
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case ERROR_LOG:
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case ERROR_LOG_CLR:
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case CNTXT_SCRATCH_0:
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return true;
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default:
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return false;
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}
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}
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const struct reg *gsi_reg(struct gsi *gsi, enum gsi_reg_id reg_id)
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{
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if (WARN(!gsi_reg_id_valid(gsi, reg_id), "invalid reg %u\n", reg_id))
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return NULL;
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return reg(gsi->regs, reg_id);
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}
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static const struct regs *gsi_regs(struct gsi *gsi)
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{
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switch (gsi->version) {
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case IPA_VERSION_3_1:
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return &gsi_regs_v3_1;
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case IPA_VERSION_3_5_1:
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return &gsi_regs_v3_5_1;
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case IPA_VERSION_4_2:
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return &gsi_regs_v4_0;
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case IPA_VERSION_4_5:
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case IPA_VERSION_4_7:
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return &gsi_regs_v4_5;
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case IPA_VERSION_4_9:
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return &gsi_regs_v4_9;
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case IPA_VERSION_4_11:
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return &gsi_regs_v4_11;
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case IPA_VERSION_5_0:
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return &gsi_regs_v5_0;
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default:
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return NULL;
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}
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}
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/* Sets gsi->virt and I/O maps the "gsi" memory range for registers */
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int gsi_reg_init(struct gsi *gsi, struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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resource_size_t size;
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/* Get GSI memory range and map it */
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gsi");
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if (!res) {
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dev_err(dev, "DT error getting \"gsi\" memory property\n");
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return -ENODEV;
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}
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size = resource_size(res);
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if (res->start > U32_MAX || size > U32_MAX - res->start) {
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dev_err(dev, "DT memory resource \"gsi\" out of range\n");
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return -EINVAL;
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}
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gsi->regs = gsi_regs(gsi);
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if (!gsi->regs) {
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dev_err(dev, "unsupported IPA version %u (?)\n", gsi->version);
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return -EINVAL;
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}
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gsi->virt = ioremap(res->start, size);
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if (!gsi->virt) {
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dev_err(dev, "unable to remap \"gsi\" memory\n");
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return -ENOMEM;
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}
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return 0;
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}
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/* Inverse of gsi_reg_init() */
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void gsi_reg_exit(struct gsi *gsi)
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{
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iounmap(gsi->virt);
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gsi->virt = NULL;
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gsi->regs = NULL;
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}
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