1 /* 2 * Copyright (c) 2012 Qualcomm Atheros, Inc. 3 * 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. 7 * 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. 15 */ 16 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> 24 25 #include "wil6210.h" 26 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"); 32 33 /* Bus ops */ 34 static int wil_if_pcie_enable(struct wil6210_priv *wil) 35 { 36 struct pci_dev *pdev = wil->pdev; 37 int rc; 38 39 pci_set_master(pdev); 40 41 /* 42 * how many MSI interrupts to request? 43 */ 44 switch (use_msi) { 45 case 3: 46 case 1: 47 case 0: 48 break; 49 default: 50 wil_err(wil, "Invalid use_msi=%d, default to 1\n", 51 use_msi); 52 use_msi = 1; 53 } 54 wil->n_msi = use_msi; 55 if (wil->n_msi) { 56 wil_dbg(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"); 60 wil->n_msi = 1; 61 rc = pci_enable_msi_block(pdev, wil->n_msi); 62 } 63 if (rc) { 64 wil_err(wil, "pci_enable_msi failed, use INTx\n"); 65 wil->n_msi = 0; 66 } 67 } else { 68 wil_dbg(wil, "MSI interrupts disabled, use INTx\n"); 69 } 70 71 rc = wil6210_init_irq(wil, pdev->irq); 72 if (rc) 73 goto stop_master; 74 75 /* need reset here to obtain MAC */ 76 rc = wil_reset(wil); 77 if (rc) 78 goto release_irq; 79 80 return 0; 81 82 release_irq: 83 wil6210_fini_irq(wil, pdev->irq); 84 /* safe to call if no MSI */ 85 pci_disable_msi(pdev); 86 stop_master: 87 pci_clear_master(pdev); 88 return rc; 89 } 90 91 static int wil_if_pcie_disable(struct wil6210_priv *wil) 92 { 93 struct pci_dev *pdev = wil->pdev; 94 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 */ 101 102 return 0; 103 } 104 105 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 106 { 107 struct wil6210_priv *wil; 108 struct device *dev = &pdev->dev; 109 void __iomem *csr; 110 int rc; 111 112 /* check HW */ 113 dev_info(&pdev->dev, WIL_NAME " device found [%04x:%04x] (rev %x)\n", 114 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); 115 116 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); 120 return -ENODEV; 121 } 122 123 rc = pci_enable_device(pdev); 124 if (rc) { 125 dev_err(&pdev->dev, "pci_enable_device failed\n"); 126 return -ENODEV; 127 } 128 /* rollback to err_disable_pdev */ 129 130 rc = pci_request_region(pdev, 0, WIL_NAME); 131 if (rc) { 132 dev_err(&pdev->dev, "pci_request_region failed\n"); 133 goto err_disable_pdev; 134 } 135 /* rollback to err_release_reg */ 136 137 csr = pci_ioremap_bar(pdev, 0); 138 if (!csr) { 139 dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); 140 rc = -ENODEV; 141 goto err_release_reg; 142 } 143 /* rollback to err_iounmap */ 144 dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr); 145 146 wil = wil_if_alloc(dev, csr); 147 if (IS_ERR(wil)) { 148 rc = (int)PTR_ERR(wil); 149 dev_err(dev, "wil_if_alloc failed: %d\n", rc); 150 goto err_iounmap; 151 } 152 /* rollback to if_free */ 153 154 pci_set_drvdata(pdev, wil); 155 wil->pdev = pdev; 156 157 /* FW should raise IRQ when ready */ 158 rc = wil_if_pcie_enable(wil); 159 if (rc) { 160 wil_err(wil, "Enable device failed\n"); 161 goto if_free; 162 } 163 /* rollback to bus_disable */ 164 165 rc = wil_if_add(wil); 166 if (rc) { 167 wil_err(wil, "wil_if_add failed: %d\n", rc); 168 goto bus_disable; 169 } 170 171 wil6210_debugfs_init(wil); 172 173 /* check FW is alive */ 174 wmi_echo(wil); 175 176 return 0; 177 178 bus_disable: 179 wil_if_pcie_disable(wil); 180 if_free: 181 wil_if_free(wil); 182 err_iounmap: 183 pci_iounmap(pdev, csr); 184 err_release_reg: 185 pci_release_region(pdev, 0); 186 err_disable_pdev: 187 pci_disable_device(pdev); 188 189 return rc; 190 } 191 192 static void wil_pcie_remove(struct pci_dev *pdev) 193 { 194 struct wil6210_priv *wil = pci_get_drvdata(pdev); 195 196 wil6210_debugfs_remove(wil); 197 wil_if_pcie_disable(wil); 198 wil_if_remove(wil); 199 wil_if_free(wil); 200 pci_iounmap(pdev, wil->csr); 201 pci_release_region(pdev, 0); 202 pci_disable_device(pdev); 203 pci_set_drvdata(pdev, NULL); 204 } 205 206 static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = { 207 { PCI_DEVICE(0x1ae9, 0x0301) }, 208 { /* end: all zeroes */ }, 209 }; 210 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); 211 212 static struct pci_driver wil6210_driver = { 213 .probe = wil_pcie_probe, 214 .remove = wil_pcie_remove, 215 .id_table = wil6210_pcie_ids, 216 .name = WIL_NAME, 217 }; 218 219 module_pci_driver(wil6210_driver); 220 221 MODULE_LICENSE("Dual BSD/GPL"); 222 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); 223 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); 224