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/module.h> 18 #include <linux/debugfs.h> 19 #include <linux/pci.h> 20 #include <linux/moduleparam.h> 21 22 #include "wil6210.h" 23 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"); 29 30 /* Bus ops */ 31 static int wil_if_pcie_enable(struct wil6210_priv *wil) 32 { 33 struct pci_dev *pdev = wil->pdev; 34 int rc; 35 36 pci_set_master(pdev); 37 38 /* 39 * how many MSI interrupts to request? 40 */ 41 switch (use_msi) { 42 case 3: 43 case 1: 44 case 0: 45 break; 46 default: 47 wil_err(wil, "Invalid use_msi=%d, default to 1\n", 48 use_msi); 49 use_msi = 1; 50 } 51 wil->n_msi = use_msi; 52 if (wil->n_msi) { 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"); 57 wil->n_msi = 1; 58 rc = pci_enable_msi_block(pdev, wil->n_msi); 59 } 60 if (rc) { 61 wil_err(wil, "pci_enable_msi failed, use INTx\n"); 62 wil->n_msi = 0; 63 } 64 } else { 65 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n"); 66 } 67 68 rc = wil6210_init_irq(wil, pdev->irq); 69 if (rc) 70 goto stop_master; 71 72 /* need reset here to obtain MAC */ 73 rc = wil_reset(wil); 74 if (rc) 75 goto release_irq; 76 77 return 0; 78 79 release_irq: 80 wil6210_fini_irq(wil, pdev->irq); 81 /* safe to call if no MSI */ 82 pci_disable_msi(pdev); 83 stop_master: 84 pci_clear_master(pdev); 85 return rc; 86 } 87 88 static int wil_if_pcie_disable(struct wil6210_priv *wil) 89 { 90 struct pci_dev *pdev = wil->pdev; 91 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 */ 98 99 return 0; 100 } 101 102 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 103 { 104 struct wil6210_priv *wil; 105 struct device *dev = &pdev->dev; 106 void __iomem *csr; 107 int rc; 108 109 /* check HW */ 110 dev_info(&pdev->dev, WIL_NAME " device found [%04x:%04x] (rev %x)\n", 111 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); 112 113 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); 117 return -ENODEV; 118 } 119 120 rc = pci_enable_device(pdev); 121 if (rc) { 122 dev_err(&pdev->dev, "pci_enable_device failed\n"); 123 return -ENODEV; 124 } 125 /* rollback to err_disable_pdev */ 126 127 rc = pci_request_region(pdev, 0, WIL_NAME); 128 if (rc) { 129 dev_err(&pdev->dev, "pci_request_region failed\n"); 130 goto err_disable_pdev; 131 } 132 /* rollback to err_release_reg */ 133 134 csr = pci_ioremap_bar(pdev, 0); 135 if (!csr) { 136 dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); 137 rc = -ENODEV; 138 goto err_release_reg; 139 } 140 /* rollback to err_iounmap */ 141 dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr); 142 143 wil = wil_if_alloc(dev, csr); 144 if (IS_ERR(wil)) { 145 rc = (int)PTR_ERR(wil); 146 dev_err(dev, "wil_if_alloc failed: %d\n", rc); 147 goto err_iounmap; 148 } 149 /* rollback to if_free */ 150 151 pci_set_drvdata(pdev, wil); 152 wil->pdev = pdev; 153 154 /* FW should raise IRQ when ready */ 155 rc = wil_if_pcie_enable(wil); 156 if (rc) { 157 wil_err(wil, "Enable device failed\n"); 158 goto if_free; 159 } 160 /* rollback to bus_disable */ 161 162 rc = wil_if_add(wil); 163 if (rc) { 164 wil_err(wil, "wil_if_add failed: %d\n", rc); 165 goto bus_disable; 166 } 167 168 wil6210_debugfs_init(wil); 169 170 /* check FW is alive */ 171 wmi_echo(wil); 172 173 return 0; 174 175 bus_disable: 176 wil_if_pcie_disable(wil); 177 if_free: 178 wil_if_free(wil); 179 err_iounmap: 180 pci_iounmap(pdev, csr); 181 err_release_reg: 182 pci_release_region(pdev, 0); 183 err_disable_pdev: 184 pci_disable_device(pdev); 185 186 return rc; 187 } 188 189 static void wil_pcie_remove(struct pci_dev *pdev) 190 { 191 struct wil6210_priv *wil = pci_get_drvdata(pdev); 192 193 wil6210_debugfs_remove(wil); 194 wil_if_pcie_disable(wil); 195 wil_if_remove(wil); 196 wil_if_free(wil); 197 pci_iounmap(pdev, wil->csr); 198 pci_release_region(pdev, 0); 199 pci_disable_device(pdev); 200 pci_set_drvdata(pdev, NULL); 201 } 202 203 static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = { 204 { PCI_DEVICE(0x1ae9, 0x0301) }, 205 { /* end: all zeroes */ }, 206 }; 207 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); 208 209 static struct pci_driver wil6210_driver = { 210 .probe = wil_pcie_probe, 211 .remove = wil_pcie_remove, 212 .id_table = wil6210_pcie_ids, 213 .name = WIL_NAME, 214 }; 215 216 module_pci_driver(wil6210_driver); 217 218 MODULE_LICENSE("Dual BSD/GPL"); 219 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); 220 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); 221