302 lines
7.1 KiB
C
302 lines
7.1 KiB
C
/*
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* Copyright (c) 2012-2014 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 "wil6210.h"
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static int use_msi = 1;
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module_param(use_msi, int, S_IRUGO);
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MODULE_PARM_DESC(use_msi,
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" Use MSI interrupt: "
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"0 - don't, 1 - (default) - single, or 3");
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static bool debug_fw; /* = false; */
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module_param(debug_fw, bool, S_IRUGO);
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MODULE_PARM_DESC(debug_fw, " load driver if FW not ready. For FW debug");
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void wil_disable_irq(struct wil6210_priv *wil)
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{
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int irq = wil->pdev->irq;
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disable_irq(irq);
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if (wil->n_msi == 3) {
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disable_irq(irq + 1);
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disable_irq(irq + 2);
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}
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}
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void wil_enable_irq(struct wil6210_priv *wil)
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{
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int irq = wil->pdev->irq;
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enable_irq(irq);
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if (wil->n_msi == 3) {
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enable_irq(irq + 1);
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enable_irq(irq + 2);
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}
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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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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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/*
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* how many MSI interrupts to request?
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*/
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switch (use_msi) {
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case 3:
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case 1:
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wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi);
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break;
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case 0:
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wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n");
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break;
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default:
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wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi);
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use_msi = 1;
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}
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if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) {
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wil_err(wil, "3 MSI mode failed, try 1 MSI\n");
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use_msi = 1;
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}
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if (use_msi == 1 && pci_enable_msi(pdev)) {
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wil_err(wil, "pci_enable_msi failed, use INTx\n");
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use_msi = 0;
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}
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wil->n_msi = use_msi;
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if ((wil->n_msi == 0) && 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);
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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);
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mutex_unlock(&wil->mutex);
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if (debug_fw)
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rc = 0;
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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_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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void __iomem *csr;
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struct wil_board *board = (struct wil_board *)id->driver_data;
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int rc;
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/* check HW */
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dev_info(&pdev->dev, WIL_NAME
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" \"%s\" device found [%04x:%04x] (rev %x)\n", board->name,
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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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rc = pci_enable_device(pdev);
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if (rc) {
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dev_err(&pdev->dev,
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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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return -ENODEV;
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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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dev_err(&pdev->dev, "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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csr = pci_ioremap_bar(pdev, 0);
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if (!csr) {
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dev_err(&pdev->dev, "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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dev_info(&pdev->dev, "CSR at %pR -> 0x%p\n", &pdev->resource[0], csr);
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wil = wil_if_alloc(dev, csr);
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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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goto err_iounmap;
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}
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/* rollback to if_free */
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pci_set_drvdata(pdev, wil);
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wil->pdev = pdev;
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wil->board = board;
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wil6210_clear_irq(wil);
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wil->platform_handle =
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wil_platform_init(&pdev->dev, &wil->platform_ops);
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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 if_free;
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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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wil6210_debugfs_init(wil);
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/* check FW is alive */
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wmi_echo(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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if_free:
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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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err_iounmap:
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pci_iounmap(pdev, 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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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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wil6210_debugfs_remove(wil);
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wil_if_remove(wil);
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wil_if_pcie_disable(wil);
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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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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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}
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static const struct wil_board wil_board_marlon = {
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.board = WIL_BOARD_MARLON,
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.name = "marlon",
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};
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static const struct wil_board wil_board_sparrow = {
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.board = WIL_BOARD_SPARROW,
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.name = "sparrow",
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};
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static const struct pci_device_id wil6210_pcie_ids[] = {
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{ PCI_DEVICE(0x1ae9, 0x0301),
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.driver_data = (kernel_ulong_t)&wil_board_marlon },
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{ PCI_DEVICE(0x1ae9, 0x0310),
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.driver_data = (kernel_ulong_t)&wil_board_sparrow },
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{ PCI_DEVICE(0x1ae9, 0x0302), /* same as above, firmware broken */
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.driver_data = (kernel_ulong_t)&wil_board_sparrow },
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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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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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};
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module_pci_driver(wil6210_driver);
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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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