461 lines
11 KiB
C
461 lines
11 KiB
C
/*
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* Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/moduleparam.h>
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#include <linux/interrupt.h>
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#include <linux/suspend.h>
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#include "wil6210.h"
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#include <linux/rtnetlink.h>
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static bool use_msi = true;
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module_param(use_msi, bool, S_IRUGO);
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MODULE_PARM_DESC(use_msi, " Use MSI interrupt, default - true");
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#ifdef CONFIG_PM
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#ifdef CONFIG_PM_SLEEP
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static int wil6210_pm_notify(struct notifier_block *notify_block,
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unsigned long mode, void *unused);
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM */
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static
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void wil_set_capabilities(struct wil6210_priv *wil)
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{
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u32 rev_id = wil_r(wil, RGF_USER_JTAG_DEV_ID);
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bitmap_zero(wil->hw_capabilities, hw_capability_last);
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bitmap_zero(wil->fw_capabilities, WMI_FW_CAPABILITY_MAX);
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switch (rev_id) {
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case JTAG_DEV_ID_SPARROW_B0:
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wil->hw_name = "Sparrow B0";
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wil->hw_version = HW_VER_SPARROW_B0;
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break;
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default:
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wil_err(wil, "Unknown board hardware 0x%08x\n", rev_id);
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wil->hw_name = "Unknown";
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wil->hw_version = HW_VER_UNKNOWN;
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}
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wil_info(wil, "Board hardware is %s\n", wil->hw_name);
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/* extract FW capabilities from file without loading the FW */
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wil_request_firmware(wil, WIL_FW_NAME, false);
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}
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void wil_disable_irq(struct wil6210_priv *wil)
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{
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disable_irq(wil->pdev->irq);
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}
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void wil_enable_irq(struct wil6210_priv *wil)
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{
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enable_irq(wil->pdev->irq);
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}
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/* Bus ops */
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static int wil_if_pcie_enable(struct wil6210_priv *wil)
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{
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struct pci_dev *pdev = wil->pdev;
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int rc;
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/* on platforms with buggy ACPI, pdev->msi_enabled may be set to
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* allow pci_enable_device to work. This indicates INTx was not routed
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* and only MSI should be used
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*/
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int msi_only = pdev->msi_enabled;
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bool _use_msi = use_msi;
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wil_dbg_misc(wil, "%s()\n", __func__);
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pdev->msi_enabled = 0;
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pci_set_master(pdev);
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wil_dbg_misc(wil, "Setup %s interrupt\n", use_msi ? "MSI" : "INTx");
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if (use_msi && pci_enable_msi(pdev)) {
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wil_err(wil, "pci_enable_msi failed, use INTx\n");
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_use_msi = false;
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}
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if (!_use_msi && msi_only) {
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wil_err(wil, "Interrupt pin not routed, unable to use INTx\n");
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rc = -ENODEV;
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goto stop_master;
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}
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rc = wil6210_init_irq(wil, pdev->irq, _use_msi);
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if (rc)
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goto stop_master;
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/* need reset here to obtain MAC */
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mutex_lock(&wil->mutex);
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rc = wil_reset(wil, false);
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mutex_unlock(&wil->mutex);
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if (rc)
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goto release_irq;
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return 0;
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release_irq:
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wil6210_fini_irq(wil, pdev->irq);
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/* safe to call if no MSI */
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pci_disable_msi(pdev);
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stop_master:
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pci_clear_master(pdev);
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return rc;
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}
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static int wil_if_pcie_disable(struct wil6210_priv *wil)
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{
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struct pci_dev *pdev = wil->pdev;
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wil_dbg_misc(wil, "%s()\n", __func__);
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pci_clear_master(pdev);
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/* disable and release IRQ */
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wil6210_fini_irq(wil, pdev->irq);
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/* safe to call if no MSI */
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pci_disable_msi(pdev);
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/* TODO: disable HW */
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return 0;
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}
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static int wil_platform_rop_ramdump(void *wil_handle, void *buf, uint32_t size)
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{
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struct wil6210_priv *wil = wil_handle;
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if (!wil)
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return -EINVAL;
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return wil_fw_copy_crash_dump(wil, buf, size);
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}
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static int wil_platform_rop_fw_recovery(void *wil_handle)
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{
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struct wil6210_priv *wil = wil_handle;
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if (!wil)
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return -EINVAL;
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wil_fw_error_recovery(wil);
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return 0;
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}
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static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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struct wil6210_priv *wil;
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struct device *dev = &pdev->dev;
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int rc;
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const struct wil_platform_rops rops = {
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.ramdump = wil_platform_rop_ramdump,
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.fw_recovery = wil_platform_rop_fw_recovery,
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};
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/* check HW */
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dev_info(&pdev->dev, WIL_NAME
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" device found [%04x:%04x] (rev %x)\n",
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(int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
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if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) {
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dev_err(&pdev->dev, "Not " WIL_NAME "? "
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"BAR0 size is %lu while expecting %lu\n",
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(ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE);
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return -ENODEV;
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}
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wil = wil_if_alloc(dev);
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if (IS_ERR(wil)) {
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rc = (int)PTR_ERR(wil);
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dev_err(dev, "wil_if_alloc failed: %d\n", rc);
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return rc;
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}
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wil->pdev = pdev;
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pci_set_drvdata(pdev, wil);
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/* rollback to if_free */
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wil->platform_handle =
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wil_platform_init(&pdev->dev, &wil->platform_ops, &rops, wil);
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if (!wil->platform_handle) {
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rc = -ENODEV;
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wil_err(wil, "wil_platform_init failed\n");
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goto if_free;
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}
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/* rollback to err_plat */
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rc = pci_enable_device(pdev);
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if (rc) {
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wil_err(wil,
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"pci_enable_device failed, retry with MSI only\n");
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/* Work around for platforms that can't allocate IRQ:
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* retry with MSI only
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*/
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pdev->msi_enabled = 1;
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rc = pci_enable_device(pdev);
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}
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if (rc) {
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wil_err(wil,
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"pci_enable_device failed, even with MSI only\n");
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goto err_plat;
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}
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/* rollback to err_disable_pdev */
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rc = pci_request_region(pdev, 0, WIL_NAME);
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if (rc) {
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wil_err(wil, "pci_request_region failed\n");
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goto err_disable_pdev;
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}
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/* rollback to err_release_reg */
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wil->csr = pci_ioremap_bar(pdev, 0);
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if (!wil->csr) {
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wil_err(wil, "pci_ioremap_bar failed\n");
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rc = -ENODEV;
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goto err_release_reg;
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}
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/* rollback to err_iounmap */
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wil_info(wil, "CSR at %pR -> 0x%p\n", &pdev->resource[0], wil->csr);
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wil_set_capabilities(wil);
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wil6210_clear_irq(wil);
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/* FW should raise IRQ when ready */
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rc = wil_if_pcie_enable(wil);
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if (rc) {
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wil_err(wil, "Enable device failed\n");
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goto err_iounmap;
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}
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/* rollback to bus_disable */
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rc = wil_if_add(wil);
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if (rc) {
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wil_err(wil, "wil_if_add failed: %d\n", rc);
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goto bus_disable;
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}
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#ifdef CONFIG_PM
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#ifdef CONFIG_PM_SLEEP
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wil->pm_notify.notifier_call = wil6210_pm_notify;
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rc = register_pm_notifier(&wil->pm_notify);
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if (rc)
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/* Do not fail the driver initialization, as suspend can
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* be prevented in a later phase if needed
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*/
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wil_err(wil, "register_pm_notifier failed: %d\n", rc);
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM */
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wil6210_debugfs_init(wil);
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return 0;
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bus_disable:
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wil_if_pcie_disable(wil);
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err_iounmap:
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pci_iounmap(pdev, wil->csr);
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err_release_reg:
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pci_release_region(pdev, 0);
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err_disable_pdev:
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pci_disable_device(pdev);
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err_plat:
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if (wil->platform_ops.uninit)
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wil->platform_ops.uninit(wil->platform_handle);
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if_free:
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wil_if_free(wil);
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return rc;
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}
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static void wil_pcie_remove(struct pci_dev *pdev)
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{
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struct wil6210_priv *wil = pci_get_drvdata(pdev);
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void __iomem *csr = wil->csr;
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wil_dbg_misc(wil, "%s()\n", __func__);
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#ifdef CONFIG_PM
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#ifdef CONFIG_PM_SLEEP
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unregister_pm_notifier(&wil->pm_notify);
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM */
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wil6210_debugfs_remove(wil);
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rtnl_lock();
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wil_p2p_wdev_free(wil);
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rtnl_unlock();
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wil_if_remove(wil);
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wil_if_pcie_disable(wil);
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pci_iounmap(pdev, csr);
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pci_release_region(pdev, 0);
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pci_disable_device(pdev);
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if (wil->platform_ops.uninit)
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wil->platform_ops.uninit(wil->platform_handle);
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wil_if_free(wil);
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}
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static const struct pci_device_id wil6210_pcie_ids[] = {
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{ PCI_DEVICE(0x1ae9, 0x0310) },
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{ PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */
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{ /* end: all zeroes */ },
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};
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MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
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#ifdef CONFIG_PM
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#ifdef CONFIG_PM_SLEEP
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static int wil6210_suspend(struct device *dev, bool is_runtime)
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{
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int rc = 0;
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struct pci_dev *pdev = to_pci_dev(dev);
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struct wil6210_priv *wil = pci_get_drvdata(pdev);
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wil_dbg_pm(wil, "%s(%s)\n", __func__,
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is_runtime ? "runtime" : "system");
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rc = wil_can_suspend(wil, is_runtime);
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if (rc)
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goto out;
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rc = wil_suspend(wil, is_runtime);
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if (rc)
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goto out;
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/* TODO: how do I bring card in low power state? */
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/* disable bus mastering */
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pci_clear_master(pdev);
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/* PCI will call pci_save_state(pdev) and pci_prepare_to_sleep(pdev) */
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out:
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return rc;
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}
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static int wil6210_resume(struct device *dev, bool is_runtime)
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{
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int rc = 0;
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struct pci_dev *pdev = to_pci_dev(dev);
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struct wil6210_priv *wil = pci_get_drvdata(pdev);
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wil_dbg_pm(wil, "%s(%s)\n", __func__,
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is_runtime ? "runtime" : "system");
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/* allow master */
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pci_set_master(pdev);
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rc = wil_resume(wil, is_runtime);
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if (rc)
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pci_clear_master(pdev);
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return rc;
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}
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static int wil6210_pm_notify(struct notifier_block *notify_block,
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unsigned long mode, void *unused)
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{
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struct wil6210_priv *wil = container_of(
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notify_block, struct wil6210_priv, pm_notify);
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int rc = 0;
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enum wil_platform_event evt;
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wil_dbg_pm(wil, "%s: mode (%ld)\n", __func__, mode);
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switch (mode) {
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case PM_HIBERNATION_PREPARE:
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case PM_SUSPEND_PREPARE:
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case PM_RESTORE_PREPARE:
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rc = wil_can_suspend(wil, false);
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if (rc)
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break;
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evt = WIL_PLATFORM_EVT_PRE_SUSPEND;
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if (wil->platform_ops.notify)
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rc = wil->platform_ops.notify(wil->platform_handle,
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evt);
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break;
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case PM_POST_SUSPEND:
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case PM_POST_HIBERNATION:
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case PM_POST_RESTORE:
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evt = WIL_PLATFORM_EVT_POST_SUSPEND;
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if (wil->platform_ops.notify)
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rc = wil->platform_ops.notify(wil->platform_handle,
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evt);
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break;
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default:
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wil_dbg_pm(wil, "unhandled notify mode %ld\n", mode);
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break;
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}
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wil_dbg_pm(wil, "notification mode %ld: rc (%d)\n", mode, rc);
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return rc;
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}
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static int wil6210_pm_suspend(struct device *dev)
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{
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return wil6210_suspend(dev, false);
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}
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static int wil6210_pm_resume(struct device *dev)
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{
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return wil6210_resume(dev, false);
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}
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#endif /* CONFIG_PM_SLEEP */
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#endif /* CONFIG_PM */
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static const struct dev_pm_ops wil6210_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)
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};
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static struct pci_driver wil6210_driver = {
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.probe = wil_pcie_probe,
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.remove = wil_pcie_remove,
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.id_table = wil6210_pcie_ids,
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.name = WIL_NAME,
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.driver = {
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.pm = &wil6210_pm_ops,
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},
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};
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static int __init wil6210_driver_init(void)
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{
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int rc;
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rc = wil_platform_modinit();
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if (rc)
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return rc;
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rc = pci_register_driver(&wil6210_driver);
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if (rc)
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wil_platform_modexit();
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return rc;
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}
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module_init(wil6210_driver_init);
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static void __exit wil6210_driver_exit(void)
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{
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pci_unregister_driver(&wil6210_driver);
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wil_platform_modexit();
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}
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module_exit(wil6210_driver_exit);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
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MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");
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