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/pci.h> 19 #include <linux/moduleparam.h> 20 21 #include "wil6210.h" 22 23 static int use_msi = 1; 24 module_param(use_msi, int, S_IRUGO); 25 MODULE_PARM_DESC(use_msi, 26 " Use MSI interrupt: " 27 "0 - don't, 1 - (default) - single, or 3"); 28 29 static bool debug_fw; /* = false; */ 30 module_param(debug_fw, bool, S_IRUGO); 31 MODULE_PARM_DESC(debug_fw, " load driver if FW not ready. For FW debug"); 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 /* on platforms with buggy ACPI, pdev->msi_enabled may be set to 39 * allow pci_enable_device to work. This indicates INTx was not routed 40 * and only MSI should be used 41 */ 42 int msi_only = pdev->msi_enabled; 43 44 pdev->msi_enabled = 0; 45 46 pci_set_master(pdev); 47 48 /* 49 * how many MSI interrupts to request? 50 */ 51 switch (use_msi) { 52 case 3: 53 case 1: 54 wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi); 55 break; 56 case 0: 57 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n"); 58 break; 59 default: 60 wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi); 61 use_msi = 1; 62 } 63 64 if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) { 65 wil_err(wil, "3 MSI mode failed, try 1 MSI\n"); 66 use_msi = 1; 67 } 68 69 if (use_msi == 1 && pci_enable_msi(pdev)) { 70 wil_err(wil, "pci_enable_msi failed, use INTx\n"); 71 use_msi = 0; 72 } 73 74 wil->n_msi = use_msi; 75 76 if ((wil->n_msi == 0) && msi_only) { 77 wil_err(wil, "Interrupt pin not routed, unable to use INTx\n"); 78 rc = -ENODEV; 79 goto stop_master; 80 } 81 82 rc = wil6210_init_irq(wil, pdev->irq); 83 if (rc) 84 goto stop_master; 85 86 /* need reset here to obtain MAC */ 87 mutex_lock(&wil->mutex); 88 rc = wil_reset(wil); 89 mutex_unlock(&wil->mutex); 90 if (debug_fw) 91 rc = 0; 92 if (rc) 93 goto release_irq; 94 95 return 0; 96 97 release_irq: 98 wil6210_fini_irq(wil, pdev->irq); 99 /* safe to call if no MSI */ 100 pci_disable_msi(pdev); 101 stop_master: 102 pci_clear_master(pdev); 103 return rc; 104 } 105 106 static int wil_if_pcie_disable(struct wil6210_priv *wil) 107 { 108 struct pci_dev *pdev = wil->pdev; 109 110 pci_clear_master(pdev); 111 /* disable and release IRQ */ 112 wil6210_fini_irq(wil, pdev->irq); 113 /* safe to call if no MSI */ 114 pci_disable_msi(pdev); 115 /* TODO: disable HW */ 116 117 return 0; 118 } 119 120 static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 121 { 122 struct wil6210_priv *wil; 123 struct device *dev = &pdev->dev; 124 void __iomem *csr; 125 struct wil_board *board = (struct wil_board *)id->driver_data; 126 int rc; 127 128 /* check HW */ 129 dev_info(&pdev->dev, WIL_NAME 130 " \"%s\" device found [%04x:%04x] (rev %x)\n", board->name, 131 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); 132 133 if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) { 134 dev_err(&pdev->dev, "Not " WIL_NAME "? " 135 "BAR0 size is %lu while expecting %lu\n", 136 (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE); 137 return -ENODEV; 138 } 139 140 rc = pci_enable_device(pdev); 141 if (rc) { 142 dev_err(&pdev->dev, 143 "pci_enable_device failed, retry with MSI only\n"); 144 /* Work around for platforms that can't allocate IRQ: 145 * retry with MSI only 146 */ 147 pdev->msi_enabled = 1; 148 rc = pci_enable_device(pdev); 149 } 150 if (rc) 151 return -ENODEV; 152 /* rollback to err_disable_pdev */ 153 154 rc = pci_request_region(pdev, 0, WIL_NAME); 155 if (rc) { 156 dev_err(&pdev->dev, "pci_request_region failed\n"); 157 goto err_disable_pdev; 158 } 159 /* rollback to err_release_reg */ 160 161 csr = pci_ioremap_bar(pdev, 0); 162 if (!csr) { 163 dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); 164 rc = -ENODEV; 165 goto err_release_reg; 166 } 167 /* rollback to err_iounmap */ 168 dev_info(&pdev->dev, "CSR at %pR -> 0x%p\n", &pdev->resource[0], csr); 169 170 wil = wil_if_alloc(dev, csr); 171 if (IS_ERR(wil)) { 172 rc = (int)PTR_ERR(wil); 173 dev_err(dev, "wil_if_alloc failed: %d\n", rc); 174 goto err_iounmap; 175 } 176 /* rollback to if_free */ 177 178 pci_set_drvdata(pdev, wil); 179 wil->pdev = pdev; 180 wil->board = board; 181 182 wil6210_clear_irq(wil); 183 /* FW should raise IRQ when ready */ 184 rc = wil_if_pcie_enable(wil); 185 if (rc) { 186 wil_err(wil, "Enable device failed\n"); 187 goto if_free; 188 } 189 /* rollback to bus_disable */ 190 191 rc = wil_if_add(wil); 192 if (rc) { 193 wil_err(wil, "wil_if_add failed: %d\n", rc); 194 goto bus_disable; 195 } 196 197 wil6210_debugfs_init(wil); 198 199 /* check FW is alive */ 200 wmi_echo(wil); 201 202 return 0; 203 204 bus_disable: 205 wil_if_pcie_disable(wil); 206 if_free: 207 wil_if_free(wil); 208 err_iounmap: 209 pci_iounmap(pdev, csr); 210 err_release_reg: 211 pci_release_region(pdev, 0); 212 err_disable_pdev: 213 pci_disable_device(pdev); 214 215 return rc; 216 } 217 218 static void wil_pcie_remove(struct pci_dev *pdev) 219 { 220 struct wil6210_priv *wil = pci_get_drvdata(pdev); 221 222 wil6210_debugfs_remove(wil); 223 wil_if_pcie_disable(wil); 224 wil_if_remove(wil); 225 wil_if_free(wil); 226 pci_iounmap(pdev, wil->csr); 227 pci_release_region(pdev, 0); 228 pci_disable_device(pdev); 229 } 230 231 static const struct wil_board wil_board_marlon = { 232 .board = WIL_BOARD_MARLON, 233 .name = "marlon", 234 }; 235 236 static const struct wil_board wil_board_sparrow = { 237 .board = WIL_BOARD_SPARROW, 238 .name = "sparrow", 239 }; 240 241 static const struct pci_device_id wil6210_pcie_ids[] = { 242 { PCI_DEVICE(0x1ae9, 0x0301), 243 .driver_data = (kernel_ulong_t)&wil_board_marlon }, 244 { PCI_DEVICE(0x1ae9, 0x0310), 245 .driver_data = (kernel_ulong_t)&wil_board_sparrow }, 246 { /* end: all zeroes */ }, 247 }; 248 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); 249 250 static struct pci_driver wil6210_driver = { 251 .probe = wil_pcie_probe, 252 .remove = wil_pcie_remove, 253 .id_table = wil6210_pcie_ids, 254 .name = WIL_NAME, 255 }; 256 257 module_pci_driver(wil6210_driver); 258 259 MODULE_LICENSE("Dual BSD/GPL"); 260 MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); 261 MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); 262