1/* 2 * Copyright (c) 2012-2014 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#include <linux/interrupt.h> 21 22#include "wil6210.h" 23 24static int use_msi = 1; 25module_param(use_msi, int, S_IRUGO); 26MODULE_PARM_DESC(use_msi, 27 " Use MSI interrupt: " 28 "0 - don't, 1 - (default) - single, or 3"); 29 30static bool debug_fw; /* = false; */ 31module_param(debug_fw, bool, S_IRUGO); 32MODULE_PARM_DESC(debug_fw, " load driver if FW not ready. For FW debug"); 33 34static 35void wil_set_capabilities(struct wil6210_priv *wil) 36{ 37 u32 rev_id = ioread32(wil->csr + HOSTADDR(RGF_USER_JTAG_DEV_ID)); 38 39 bitmap_zero(wil->hw_capabilities, hw_capability_last); 40 41 switch (rev_id) { 42 case JTAG_DEV_ID_SPARROW_B0: 43 wil->hw_name = "Sparrow B0"; 44 wil->hw_version = HW_VER_SPARROW_B0; 45 break; 46 default: 47 wil_err(wil, "Unknown board hardware 0x%08x\n", rev_id); 48 wil->hw_name = "Unknown"; 49 wil->hw_version = HW_VER_UNKNOWN; 50 } 51 52 wil_info(wil, "Board hardware is %s\n", wil->hw_name); 53} 54 55void wil_disable_irq(struct wil6210_priv *wil) 56{ 57 int irq = wil->pdev->irq; 58 59 disable_irq(irq); 60 if (wil->n_msi == 3) { 61 disable_irq(irq + 1); 62 disable_irq(irq + 2); 63 } 64} 65 66void wil_enable_irq(struct wil6210_priv *wil) 67{ 68 int irq = wil->pdev->irq; 69 70 enable_irq(irq); 71 if (wil->n_msi == 3) { 72 enable_irq(irq + 1); 73 enable_irq(irq + 2); 74 } 75} 76 77/* Bus ops */ 78static int wil_if_pcie_enable(struct wil6210_priv *wil) 79{ 80 struct pci_dev *pdev = wil->pdev; 81 int rc; 82 /* on platforms with buggy ACPI, pdev->msi_enabled may be set to 83 * allow pci_enable_device to work. This indicates INTx was not routed 84 * and only MSI should be used 85 */ 86 int msi_only = pdev->msi_enabled; 87 88 wil_dbg_misc(wil, "%s()\n", __func__); 89 90 pdev->msi_enabled = 0; 91 92 pci_set_master(pdev); 93 94 /* 95 * how many MSI interrupts to request? 96 */ 97 switch (use_msi) { 98 case 3: 99 case 1: 100 wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi); 101 break; 102 case 0: 103 wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n"); 104 break; 105 default: 106 wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi); 107 use_msi = 1; 108 } 109 110 if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) { 111 wil_err(wil, "3 MSI mode failed, try 1 MSI\n"); 112 use_msi = 1; 113 } 114 115 if (use_msi == 1 && pci_enable_msi(pdev)) { 116 wil_err(wil, "pci_enable_msi failed, use INTx\n"); 117 use_msi = 0; 118 } 119 120 wil->n_msi = use_msi; 121 122 if ((wil->n_msi == 0) && msi_only) { 123 wil_err(wil, "Interrupt pin not routed, unable to use INTx\n"); 124 rc = -ENODEV; 125 goto stop_master; 126 } 127 128 rc = wil6210_init_irq(wil, pdev->irq); 129 if (rc) 130 goto stop_master; 131 132 /* need reset here to obtain MAC */ 133 mutex_lock(&wil->mutex); 134 rc = wil_reset(wil, false); 135 mutex_unlock(&wil->mutex); 136 if (debug_fw) 137 rc = 0; 138 if (rc) 139 goto release_irq; 140 141 return 0; 142 143 release_irq: 144 wil6210_fini_irq(wil, pdev->irq); 145 /* safe to call if no MSI */ 146 pci_disable_msi(pdev); 147 stop_master: 148 pci_clear_master(pdev); 149 return rc; 150} 151 152static int wil_if_pcie_disable(struct wil6210_priv *wil) 153{ 154 struct pci_dev *pdev = wil->pdev; 155 156 wil_dbg_misc(wil, "%s()\n", __func__); 157 158 pci_clear_master(pdev); 159 /* disable and release IRQ */ 160 wil6210_fini_irq(wil, pdev->irq); 161 /* safe to call if no MSI */ 162 pci_disable_msi(pdev); 163 /* TODO: disable HW */ 164 165 return 0; 166} 167 168static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) 169{ 170 struct wil6210_priv *wil; 171 struct device *dev = &pdev->dev; 172 void __iomem *csr; 173 int rc; 174 175 /* check HW */ 176 dev_info(&pdev->dev, WIL_NAME 177 " device found [%04x:%04x] (rev %x)\n", 178 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); 179 180 if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) { 181 dev_err(&pdev->dev, "Not " WIL_NAME "? " 182 "BAR0 size is %lu while expecting %lu\n", 183 (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE); 184 return -ENODEV; 185 } 186 187 rc = pci_enable_device(pdev); 188 if (rc) { 189 dev_err(&pdev->dev, 190 "pci_enable_device failed, retry with MSI only\n"); 191 /* Work around for platforms that can't allocate IRQ: 192 * retry with MSI only 193 */ 194 pdev->msi_enabled = 1; 195 rc = pci_enable_device(pdev); 196 } 197 if (rc) 198 return -ENODEV; 199 /* rollback to err_disable_pdev */ 200 201 rc = pci_request_region(pdev, 0, WIL_NAME); 202 if (rc) { 203 dev_err(&pdev->dev, "pci_request_region failed\n"); 204 goto err_disable_pdev; 205 } 206 /* rollback to err_release_reg */ 207 208 csr = pci_ioremap_bar(pdev, 0); 209 if (!csr) { 210 dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); 211 rc = -ENODEV; 212 goto err_release_reg; 213 } 214 /* rollback to err_iounmap */ 215 dev_info(&pdev->dev, "CSR at %pR -> 0x%p\n", &pdev->resource[0], csr); 216 217 wil = wil_if_alloc(dev, csr); 218 if (IS_ERR(wil)) { 219 rc = (int)PTR_ERR(wil); 220 dev_err(dev, "wil_if_alloc failed: %d\n", rc); 221 goto err_iounmap; 222 } 223 /* rollback to if_free */ 224 225 pci_set_drvdata(pdev, wil); 226 wil->pdev = pdev; 227 wil_set_capabilities(wil); 228 wil6210_clear_irq(wil); 229 230 wil->platform_handle = 231 wil_platform_init(&pdev->dev, &wil->platform_ops); 232 233 /* FW should raise IRQ when ready */ 234 rc = wil_if_pcie_enable(wil); 235 if (rc) { 236 wil_err(wil, "Enable device failed\n"); 237 goto if_free; 238 } 239 /* rollback to bus_disable */ 240 241 rc = wil_if_add(wil); 242 if (rc) { 243 wil_err(wil, "wil_if_add failed: %d\n", rc); 244 goto bus_disable; 245 } 246 247 wil6210_debugfs_init(wil); 248 249 250 return 0; 251 252 bus_disable: 253 wil_if_pcie_disable(wil); 254 if_free: 255 if (wil->platform_ops.uninit) 256 wil->platform_ops.uninit(wil->platform_handle); 257 wil_if_free(wil); 258 err_iounmap: 259 pci_iounmap(pdev, csr); 260 err_release_reg: 261 pci_release_region(pdev, 0); 262 err_disable_pdev: 263 pci_disable_device(pdev); 264 265 return rc; 266} 267 268static void wil_pcie_remove(struct pci_dev *pdev) 269{ 270 struct wil6210_priv *wil = pci_get_drvdata(pdev); 271 void __iomem *csr = wil->csr; 272 273 wil_dbg_misc(wil, "%s()\n", __func__); 274 275 wil6210_debugfs_remove(wil); 276 wil_if_remove(wil); 277 wil_if_pcie_disable(wil); 278 if (wil->platform_ops.uninit) 279 wil->platform_ops.uninit(wil->platform_handle); 280 wil_if_free(wil); 281 pci_iounmap(pdev, csr); 282 pci_release_region(pdev, 0); 283 pci_disable_device(pdev); 284} 285 286static const struct pci_device_id wil6210_pcie_ids[] = { 287 { PCI_DEVICE(0x1ae9, 0x0310) }, 288 { PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */ 289 { /* end: all zeroes */ }, 290}; 291MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); 292 293static struct pci_driver wil6210_driver = { 294 .probe = wil_pcie_probe, 295 .remove = wil_pcie_remove, 296 .id_table = wil6210_pcie_ids, 297 .name = WIL_NAME, 298}; 299 300module_pci_driver(wil6210_driver); 301 302MODULE_LICENSE("Dual BSD/GPL"); 303MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); 304MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); 305