2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <linux/module.h>
18 #include <linux/debugfs.h>
19 #include <linux/pci.h>
20 #include <linux/moduleparam.h>
24 static int use_msi = 1;
25 module_param(use_msi, int, S_IRUGO);
26 MODULE_PARM_DESC(use_msi,
27 " Use MSI interrupt: "
28 "0 - don't, 1 - (default) - single, or 3");
31 static int wil_if_pcie_enable(struct wil6210_priv *wil)
33 struct pci_dev *pdev = wil->pdev;
39 * how many MSI interrupts to request?
47 wil_err(wil, "Invalid use_msi=%d, default to 1\n",
53 wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi);
54 rc = pci_enable_msi_block(pdev, wil->n_msi);
55 if (rc && (wil->n_msi == 3)) {
56 wil_err(wil, "3 MSI mode failed, try 1 MSI\n");
58 rc = pci_enable_msi_block(pdev, wil->n_msi);
61 wil_err(wil, "pci_enable_msi failed, use INTx\n");
65 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n");
68 rc = wil6210_init_irq(wil, pdev->irq);
72 /* need reset here to obtain MAC */
80 wil6210_fini_irq(wil, pdev->irq);
81 /* safe to call if no MSI */
82 pci_disable_msi(pdev);
84 pci_clear_master(pdev);
88 static int wil_if_pcie_disable(struct wil6210_priv *wil)
90 struct pci_dev *pdev = wil->pdev;
92 pci_clear_master(pdev);
93 /* disable and release IRQ */
94 wil6210_fini_irq(wil, pdev->irq);
95 /* safe to call if no MSI */
96 pci_disable_msi(pdev);
97 /* TODO: disable HW */
102 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
104 struct wil6210_priv *wil;
105 struct device *dev = &pdev->dev;
110 dev_info(&pdev->dev, WIL_NAME " device found [%04x:%04x] (rev %x)\n",
111 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
113 if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) {
114 dev_err(&pdev->dev, "Not " WIL_NAME "? "
115 "BAR0 size is %lu while expecting %lu\n",
116 (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE);
120 rc = pci_enable_device(pdev);
122 dev_err(&pdev->dev, "pci_enable_device failed\n");
125 /* rollback to err_disable_pdev */
127 rc = pci_request_region(pdev, 0, WIL_NAME);
129 dev_err(&pdev->dev, "pci_request_region failed\n");
130 goto err_disable_pdev;
132 /* rollback to err_release_reg */
134 csr = pci_ioremap_bar(pdev, 0);
136 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
138 goto err_release_reg;
140 /* rollback to err_iounmap */
141 dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr);
143 wil = wil_if_alloc(dev, csr);
145 rc = (int)PTR_ERR(wil);
146 dev_err(dev, "wil_if_alloc failed: %d\n", rc);
149 /* rollback to if_free */
151 pci_set_drvdata(pdev, wil);
154 /* FW should raise IRQ when ready */
155 rc = wil_if_pcie_enable(wil);
157 wil_err(wil, "Enable device failed\n");
160 /* rollback to bus_disable */
162 rc = wil_if_add(wil);
164 wil_err(wil, "wil_if_add failed: %d\n", rc);
168 wil6210_debugfs_init(wil);
170 /* check FW is alive */
176 wil_if_pcie_disable(wil);
180 pci_iounmap(pdev, csr);
182 pci_release_region(pdev, 0);
184 pci_disable_device(pdev);
189 static void wil_pcie_remove(struct pci_dev *pdev)
191 struct wil6210_priv *wil = pci_get_drvdata(pdev);
193 wil6210_debugfs_remove(wil);
194 wil_if_pcie_disable(wil);
197 pci_iounmap(pdev, wil->csr);
198 pci_release_region(pdev, 0);
199 pci_disable_device(pdev);
200 pci_set_drvdata(pdev, NULL);
203 static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = {
204 { PCI_DEVICE(0x1ae9, 0x0301) },
205 { /* end: all zeroes */ },
207 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
209 static struct pci_driver wil6210_driver = {
210 .probe = wil_pcie_probe,
211 .remove = wil_pcie_remove,
212 .id_table = wil6210_pcie_ids,
216 module_pci_driver(wil6210_driver);
218 MODULE_LICENSE("Dual BSD/GPL");
219 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
220 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");