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/kernel.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/netdevice.h>
21 #include <linux/debugfs.h>
22 #include <linux/pci.h>
23 #include <linux/moduleparam.h>
27 static int use_msi = 1;
28 module_param(use_msi, int, S_IRUGO);
29 MODULE_PARM_DESC(use_msi,
30 " Use MSI interrupt: "
31 "0 - don't, 1 - (default) - single, or 3");
34 static int wil_if_pcie_enable(struct wil6210_priv *wil)
36 struct pci_dev *pdev = wil->pdev;
42 * how many MSI interrupts to request?
50 wil_err(wil, "Invalid use_msi=%d, default to 1\n",
56 wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi);
57 rc = pci_enable_msi_block(pdev, wil->n_msi);
58 if (rc && (wil->n_msi == 3)) {
59 wil_err(wil, "3 MSI mode failed, try 1 MSI\n");
61 rc = pci_enable_msi_block(pdev, wil->n_msi);
64 wil_err(wil, "pci_enable_msi failed, use INTx\n");
68 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n");
71 rc = wil6210_init_irq(wil, pdev->irq);
75 /* need reset here to obtain MAC */
83 wil6210_fini_irq(wil, pdev->irq);
84 /* safe to call if no MSI */
85 pci_disable_msi(pdev);
87 pci_clear_master(pdev);
91 static int wil_if_pcie_disable(struct wil6210_priv *wil)
93 struct pci_dev *pdev = wil->pdev;
95 pci_clear_master(pdev);
96 /* disable and release IRQ */
97 wil6210_fini_irq(wil, pdev->irq);
98 /* safe to call if no MSI */
99 pci_disable_msi(pdev);
100 /* TODO: disable HW */
105 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
107 struct wil6210_priv *wil;
108 struct device *dev = &pdev->dev;
113 dev_info(&pdev->dev, WIL_NAME " device found [%04x:%04x] (rev %x)\n",
114 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
116 if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) {
117 dev_err(&pdev->dev, "Not " WIL_NAME "? "
118 "BAR0 size is %lu while expecting %lu\n",
119 (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE);
123 rc = pci_enable_device(pdev);
125 dev_err(&pdev->dev, "pci_enable_device failed\n");
128 /* rollback to err_disable_pdev */
130 rc = pci_request_region(pdev, 0, WIL_NAME);
132 dev_err(&pdev->dev, "pci_request_region failed\n");
133 goto err_disable_pdev;
135 /* rollback to err_release_reg */
137 csr = pci_ioremap_bar(pdev, 0);
139 dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
141 goto err_release_reg;
143 /* rollback to err_iounmap */
144 dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr);
146 wil = wil_if_alloc(dev, csr);
148 rc = (int)PTR_ERR(wil);
149 dev_err(dev, "wil_if_alloc failed: %d\n", rc);
152 /* rollback to if_free */
154 pci_set_drvdata(pdev, wil);
157 /* FW should raise IRQ when ready */
158 rc = wil_if_pcie_enable(wil);
160 wil_err(wil, "Enable device failed\n");
163 /* rollback to bus_disable */
165 rc = wil_if_add(wil);
167 wil_err(wil, "wil_if_add failed: %d\n", rc);
171 wil6210_debugfs_init(wil);
173 /* check FW is alive */
179 wil_if_pcie_disable(wil);
183 pci_iounmap(pdev, csr);
185 pci_release_region(pdev, 0);
187 pci_disable_device(pdev);
192 static void wil_pcie_remove(struct pci_dev *pdev)
194 struct wil6210_priv *wil = pci_get_drvdata(pdev);
196 wil6210_debugfs_remove(wil);
197 wil_if_pcie_disable(wil);
200 pci_iounmap(pdev, wil->csr);
201 pci_release_region(pdev, 0);
202 pci_disable_device(pdev);
203 pci_set_drvdata(pdev, NULL);
206 static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = {
207 { PCI_DEVICE(0x1ae9, 0x0301) },
208 { /* end: all zeroes */ },
210 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
212 static struct pci_driver wil6210_driver = {
213 .probe = wil_pcie_probe,
214 .remove = wil_pcie_remove,
215 .id_table = wil6210_pcie_ids,
219 module_pci_driver(wil6210_driver);
221 MODULE_LICENSE("Dual BSD/GPL");
222 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
223 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");