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path: root/drivers/acpi/csrt.c
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Diffstat (limited to 'drivers/acpi/csrt.c')
-rw-r--r--drivers/acpi/csrt.c159
1 files changed, 0 insertions, 159 deletions
diff --git a/drivers/acpi/csrt.c b/drivers/acpi/csrt.c
deleted file mode 100644
index 5c15a91faf0..00000000000
--- a/drivers/acpi/csrt.c
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Support for Core System Resources Table (CSRT)
- *
- * Copyright (C) 2013, Intel Corporation
- * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
- * Andy Shevchenko <andriy.shevchenko@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#define pr_fmt(fmt) "ACPI: CSRT: " fmt
-
-#include <linux/acpi.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/sizes.h>
-
-ACPI_MODULE_NAME("CSRT");
-
-static int __init acpi_csrt_parse_shared_info(struct platform_device *pdev,
- const struct acpi_csrt_group *grp)
-{
- const struct acpi_csrt_shared_info *si;
- struct resource res[3];
- size_t nres;
- int ret;
-
- memset(res, 0, sizeof(res));
- nres = 0;
-
- si = (const struct acpi_csrt_shared_info *)&grp[1];
- /*
- * The peripherals that are listed on CSRT typically support only
- * 32-bit addresses so we only use the low part of MMIO base for
- * now.
- */
- if (!si->mmio_base_high && si->mmio_base_low) {
- /*
- * There is no size of the memory resource in shared_info
- * so we assume that it is 4k here.
- */
- res[nres].start = si->mmio_base_low;
- res[nres].end = res[0].start + SZ_4K - 1;
- res[nres++].flags = IORESOURCE_MEM;
- }
-
- if (si->gsi_interrupt) {
- int irq = acpi_register_gsi(NULL, si->gsi_interrupt,
- si->interrupt_mode,
- si->interrupt_polarity);
- res[nres].start = irq;
- res[nres].end = irq;
- res[nres++].flags = IORESOURCE_IRQ;
- }
-
- if (si->base_request_line || si->num_handshake_signals) {
- /*
- * We pass the driver a DMA resource describing the range
- * of request lines the device supports.
- */
- res[nres].start = si->base_request_line;
- res[nres].end = res[nres].start + si->num_handshake_signals - 1;
- res[nres++].flags = IORESOURCE_DMA;
- }
-
- ret = platform_device_add_resources(pdev, res, nres);
- if (ret) {
- if (si->gsi_interrupt)
- acpi_unregister_gsi(si->gsi_interrupt);
- return ret;
- }
-
- return 0;
-}
-
-static int __init
-acpi_csrt_parse_resource_group(const struct acpi_csrt_group *grp)
-{
- struct platform_device *pdev;
- char vendor[5], name[16];
- int ret, i;
-
- vendor[0] = grp->vendor_id;
- vendor[1] = grp->vendor_id >> 8;
- vendor[2] = grp->vendor_id >> 16;
- vendor[3] = grp->vendor_id >> 24;
- vendor[4] = '\0';
-
- if (grp->shared_info_length != sizeof(struct acpi_csrt_shared_info))
- return -ENODEV;
-
- snprintf(name, sizeof(name), "%s%04X", vendor, grp->device_id);
- pdev = platform_device_alloc(name, PLATFORM_DEVID_AUTO);
- if (!pdev)
- return -ENOMEM;
-
- /* Add resources based on the shared info */
- ret = acpi_csrt_parse_shared_info(pdev, grp);
- if (ret)
- goto fail;
-
- ret = platform_device_add(pdev);
- if (ret)
- goto fail;
-
- for (i = 0; i < pdev->num_resources; i++)
- dev_dbg(&pdev->dev, "%pR\n", &pdev->resource[i]);
-
- return 0;
-
-fail:
- platform_device_put(pdev);
- return ret;
-}
-
-/*
- * CSRT or Core System Resources Table is a proprietary ACPI table
- * introduced by Microsoft. This table can contain devices that are not in
- * the system DSDT table. In particular DMA controllers might be described
- * here.
- *
- * We present these devices as normal platform devices that don't have ACPI
- * IDs or handle. The platform device name will be something like
- * <VENDOR><DEVID>.<n>.auto for example: INTL9C06.0.auto.
- */
-void __init acpi_csrt_init(void)
-{
- struct acpi_csrt_group *grp, *end;
- struct acpi_table_csrt *csrt;
- acpi_status status;
- int ret;
-
- status = acpi_get_table(ACPI_SIG_CSRT, 0,
- (struct acpi_table_header **)&csrt);
- if (ACPI_FAILURE(status)) {
- if (status != AE_NOT_FOUND)
- pr_warn("failed to get the CSRT table\n");
- return;
- }
-
- pr_debug("parsing CSRT table for devices\n");
-
- grp = (struct acpi_csrt_group *)(csrt + 1);
- end = (struct acpi_csrt_group *)((void *)csrt + csrt->header.length);
-
- while (grp < end) {
- ret = acpi_csrt_parse_resource_group(grp);
- if (ret) {
- pr_warn("error in parsing resource group: %d\n", ret);
- return;
- }
-
- grp = (struct acpi_csrt_group *)((void *)grp + grp->length);
- }
-}