Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 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 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 17 | #include <linux/module.h> |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 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: |
Alexander Gordeev | b4b3906 | 2014-02-18 11:12:04 +0100 | [diff] [blame^] | 44 | wil_dbg_misc(wil, "Setup %d MSI interrupts\n", use_msi); |
| 45 | break; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 46 | case 0: |
Alexander Gordeev | b4b3906 | 2014-02-18 11:12:04 +0100 | [diff] [blame^] | 47 | wil_dbg_misc(wil, "MSI interrupts disabled, use INTx\n"); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 48 | break; |
| 49 | default: |
Alexander Gordeev | b4b3906 | 2014-02-18 11:12:04 +0100 | [diff] [blame^] | 50 | wil_err(wil, "Invalid use_msi=%d, default to 1\n", use_msi); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 51 | use_msi = 1; |
| 52 | } |
Alexander Gordeev | b4b3906 | 2014-02-18 11:12:04 +0100 | [diff] [blame^] | 53 | |
| 54 | if (use_msi == 3 && pci_enable_msi_range(pdev, 3, 3) < 0) { |
| 55 | wil_err(wil, "3 MSI mode failed, try 1 MSI\n"); |
| 56 | use_msi = 1; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 57 | } |
| 58 | |
Alexander Gordeev | b4b3906 | 2014-02-18 11:12:04 +0100 | [diff] [blame^] | 59 | if (use_msi == 1 && pci_enable_msi(pdev)) { |
| 60 | wil_err(wil, "pci_enable_msi failed, use INTx\n"); |
| 61 | use_msi = 0; |
| 62 | } |
| 63 | |
| 64 | wil->n_msi = use_msi; |
| 65 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 66 | rc = wil6210_init_irq(wil, pdev->irq); |
| 67 | if (rc) |
| 68 | goto stop_master; |
| 69 | |
| 70 | /* need reset here to obtain MAC */ |
| 71 | rc = wil_reset(wil); |
| 72 | if (rc) |
| 73 | goto release_irq; |
| 74 | |
| 75 | return 0; |
| 76 | |
| 77 | release_irq: |
| 78 | wil6210_fini_irq(wil, pdev->irq); |
| 79 | /* safe to call if no MSI */ |
| 80 | pci_disable_msi(pdev); |
| 81 | stop_master: |
| 82 | pci_clear_master(pdev); |
| 83 | return rc; |
| 84 | } |
| 85 | |
| 86 | static int wil_if_pcie_disable(struct wil6210_priv *wil) |
| 87 | { |
| 88 | struct pci_dev *pdev = wil->pdev; |
| 89 | |
| 90 | pci_clear_master(pdev); |
| 91 | /* disable and release IRQ */ |
| 92 | wil6210_fini_irq(wil, pdev->irq); |
| 93 | /* safe to call if no MSI */ |
| 94 | pci_disable_msi(pdev); |
| 95 | /* TODO: disable HW */ |
| 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 101 | { |
| 102 | struct wil6210_priv *wil; |
| 103 | struct device *dev = &pdev->dev; |
| 104 | void __iomem *csr; |
| 105 | int rc; |
| 106 | |
| 107 | /* check HW */ |
| 108 | dev_info(&pdev->dev, WIL_NAME " device found [%04x:%04x] (rev %x)\n", |
| 109 | (int)pdev->vendor, (int)pdev->device, (int)pdev->revision); |
| 110 | |
| 111 | if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) { |
| 112 | dev_err(&pdev->dev, "Not " WIL_NAME "? " |
| 113 | "BAR0 size is %lu while expecting %lu\n", |
| 114 | (ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE); |
| 115 | return -ENODEV; |
| 116 | } |
| 117 | |
| 118 | rc = pci_enable_device(pdev); |
| 119 | if (rc) { |
| 120 | dev_err(&pdev->dev, "pci_enable_device failed\n"); |
| 121 | return -ENODEV; |
| 122 | } |
| 123 | /* rollback to err_disable_pdev */ |
| 124 | |
| 125 | rc = pci_request_region(pdev, 0, WIL_NAME); |
| 126 | if (rc) { |
| 127 | dev_err(&pdev->dev, "pci_request_region failed\n"); |
| 128 | goto err_disable_pdev; |
| 129 | } |
| 130 | /* rollback to err_release_reg */ |
| 131 | |
| 132 | csr = pci_ioremap_bar(pdev, 0); |
| 133 | if (!csr) { |
| 134 | dev_err(&pdev->dev, "pci_ioremap_bar failed\n"); |
| 135 | rc = -ENODEV; |
| 136 | goto err_release_reg; |
| 137 | } |
| 138 | /* rollback to err_iounmap */ |
| 139 | dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr); |
| 140 | |
| 141 | wil = wil_if_alloc(dev, csr); |
| 142 | if (IS_ERR(wil)) { |
| 143 | rc = (int)PTR_ERR(wil); |
| 144 | dev_err(dev, "wil_if_alloc failed: %d\n", rc); |
| 145 | goto err_iounmap; |
| 146 | } |
| 147 | /* rollback to if_free */ |
| 148 | |
| 149 | pci_set_drvdata(pdev, wil); |
| 150 | wil->pdev = pdev; |
| 151 | |
| 152 | /* FW should raise IRQ when ready */ |
| 153 | rc = wil_if_pcie_enable(wil); |
| 154 | if (rc) { |
| 155 | wil_err(wil, "Enable device failed\n"); |
| 156 | goto if_free; |
| 157 | } |
| 158 | /* rollback to bus_disable */ |
| 159 | |
| 160 | rc = wil_if_add(wil); |
| 161 | if (rc) { |
| 162 | wil_err(wil, "wil_if_add failed: %d\n", rc); |
| 163 | goto bus_disable; |
| 164 | } |
| 165 | |
| 166 | wil6210_debugfs_init(wil); |
| 167 | |
| 168 | /* check FW is alive */ |
| 169 | wmi_echo(wil); |
| 170 | |
| 171 | return 0; |
| 172 | |
| 173 | bus_disable: |
| 174 | wil_if_pcie_disable(wil); |
| 175 | if_free: |
| 176 | wil_if_free(wil); |
| 177 | err_iounmap: |
| 178 | pci_iounmap(pdev, csr); |
| 179 | err_release_reg: |
| 180 | pci_release_region(pdev, 0); |
| 181 | err_disable_pdev: |
| 182 | pci_disable_device(pdev); |
| 183 | |
| 184 | return rc; |
| 185 | } |
| 186 | |
| 187 | static void wil_pcie_remove(struct pci_dev *pdev) |
| 188 | { |
| 189 | struct wil6210_priv *wil = pci_get_drvdata(pdev); |
| 190 | |
| 191 | wil6210_debugfs_remove(wil); |
| 192 | wil_if_pcie_disable(wil); |
| 193 | wil_if_remove(wil); |
| 194 | wil_if_free(wil); |
| 195 | pci_iounmap(pdev, wil->csr); |
| 196 | pci_release_region(pdev, 0); |
| 197 | pci_disable_device(pdev); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = { |
| 201 | { PCI_DEVICE(0x1ae9, 0x0301) }, |
| 202 | { /* end: all zeroes */ }, |
| 203 | }; |
| 204 | MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids); |
| 205 | |
| 206 | static struct pci_driver wil6210_driver = { |
| 207 | .probe = wil_pcie_probe, |
| 208 | .remove = wil_pcie_remove, |
| 209 | .id_table = wil6210_pcie_ids, |
| 210 | .name = WIL_NAME, |
| 211 | }; |
| 212 | |
| 213 | module_pci_driver(wil6210_driver); |
| 214 | |
| 215 | MODULE_LICENSE("Dual BSD/GPL"); |
| 216 | MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>"); |
| 217 | MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card"); |