b4f2036141
Add Hardware Abstraction Layer infrastructure to GSI driver. This change includes registers HAL component for GSI. Change-Id: I87e7c22ed88117a74af4220b4c05c610bae498cc Signed-off-by: Amir Levy <alevy@codeaurora.org> Signed-off-by: Ilia Lin <ilialin@codeaurora.org>
72 行
1.4 KiB
C
72 行
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*/
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#include "gsihal_i.h"
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#include "gsihal_reg.h"
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struct gsihal_context *gsihal_ctx;
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int gsihal_init(enum gsi_ver gsi_ver, void __iomem *base)
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{
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int result = 0;
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GSIDBG("initializing GSI HAL, GSI ver %d, base = %pK\n",
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gsi_ver, base);
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if (gsihal_ctx) {
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GSIDBG("gsihal already initialized\n");
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if (base != gsihal_ctx->base) {
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GSIERR(
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"base address of early init is differnet (%pK - %pK)\n"
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);
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WARN_ON(1);
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}
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result = -EEXIST;
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goto bail_err_exit;
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}
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if (gsi_ver < GSI_VER_1_0 || gsi_ver >= GSI_VER_MAX) {
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GSIERR("invalid GSI version %d\n", gsi_ver);
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result = -EINVAL;
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goto bail_err_exit;
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}
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if (!base) {
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GSIERR("invalid memory io mapping addr\n");
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result = -EINVAL;
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goto bail_err_exit;
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}
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gsihal_ctx = kzalloc(sizeof(*gsihal_ctx), GFP_KERNEL);
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if (!gsihal_ctx) {
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GSIERR("kzalloc err for gsihal_ctx\n");
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result = -ENOMEM;
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goto bail_err_exit;
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}
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gsihal_ctx->gsi_ver = gsi_ver;
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gsihal_ctx->base = base;
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if (gsihal_reg_init(gsi_ver)) {
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GSIERR("failed to initialize gsihal regs\n");
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result = -EINVAL;
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goto bail_free_ctx;
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}
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return 0;
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bail_free_ctx:
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kfree(gsihal_ctx);
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gsihal_ctx = NULL;
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bail_err_exit:
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return result;
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}
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void gsihal_destroy(void)
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{
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GSIDBG("Entry\n");
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kfree(gsihal_ctx);
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gsihal_ctx = NULL;
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}
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