1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * COMEDI driver for generic PCI based 8255 digital i/o boards 4 * Copyright (C) 2012 H Hartley Sweeten <hsweeten@visionengravers.com> 5 * 6 * Based on the tested adl_pci7296 driver written by: 7 * Jon Grierson <jd@renko.co.uk> 8 * and the experimental cb_pcidio driver written by: 9 * Yoshiya Matsuzaka 10 * 11 * COMEDI - Linux Control and Measurement Device Interface 12 * Copyright (C) 2000 David A. Schleef <ds@schleef.org> 13 */ 14 15 /* 16 * Driver: 8255_pci 17 * Description: Generic PCI based 8255 Digital I/O boards 18 * Devices: [ADLink] PCI-7224 (adl_pci-7224), PCI-7248 (adl_pci-7248), 19 * PCI-7296 (adl_pci-7296), 20 * [Measurement Computing] PCI-DIO24 (cb_pci-dio24), 21 * PCI-DIO24H (cb_pci-dio24h), PCI-DIO48H (cb_pci-dio48h), 22 * PCI-DIO96H (cb_pci-dio96h), 23 * [National Instruments] PCI-DIO-96 (ni_pci-dio-96), 24 * PCI-DIO-96B (ni_pci-dio-96b), PXI-6508 (ni_pxi-6508), 25 * PCI-6503 (ni_pci-6503), PCI-6503B (ni_pci-6503b), 26 * PCI-6503X (ni_pci-6503x), PXI-6503 (ni_pxi-6503) 27 * Author: H Hartley Sweeten <hsweeten@visionengravers.com> 28 * Updated: Wed, 12 Sep 2012 11:52:01 -0700 29 * Status: untested 30 * 31 * These boards have one or more 8255 digital I/O chips, each of which 32 * is supported as a separate 24-channel DIO subdevice. 33 * 34 * Boards with 24 DIO channels (1 DIO subdevice): 35 * 36 * PCI-7224, PCI-DIO24, PCI-DIO24H, PCI-6503, PCI-6503B, PCI-6503X, 37 * PXI-6503 38 * 39 * Boards with 48 DIO channels (2 DIO subdevices): 40 * 41 * PCI-7248, PCI-DIO48H 42 * 43 * Boards with 96 DIO channels (4 DIO subdevices): 44 * 45 * PCI-7296, PCI-DIO96H, PCI-DIO-96, PCI-DIO-96B, PXI-6508 46 * 47 * Some of these boards also have an 8254 programmable timer/counter 48 * chip. This chip is not currently supported by this driver. 49 * 50 * Interrupt support for these boards is also not currently supported. 51 * 52 * Configuration Options: not applicable, uses PCI auto config. 53 */ 54 55 #include <linux/module.h> 56 #include <linux/comedi/comedi_pci.h> 57 #include <linux/comedi/comedi_8255.h> 58 59 enum pci_8255_boardid { 60 BOARD_ADLINK_PCI7224, 61 BOARD_ADLINK_PCI7248, 62 BOARD_ADLINK_PCI7296, 63 BOARD_CB_PCIDIO24, 64 BOARD_CB_PCIDIO24H, 65 BOARD_CB_PCIDIO48H_OLD, 66 BOARD_CB_PCIDIO48H_NEW, 67 BOARD_CB_PCIDIO96H, 68 BOARD_NI_PCIDIO96, 69 BOARD_NI_PCIDIO96B, 70 BOARD_NI_PXI6508, 71 BOARD_NI_PCI6503, 72 BOARD_NI_PCI6503B, 73 BOARD_NI_PCI6503X, 74 BOARD_NI_PXI_6503, 75 }; 76 77 struct pci_8255_boardinfo { 78 const char *name; 79 int dio_badr; 80 int n_8255; 81 unsigned int has_mite:1; 82 }; 83 84 static const struct pci_8255_boardinfo pci_8255_boards[] = { 85 [BOARD_ADLINK_PCI7224] = { 86 .name = "adl_pci-7224", 87 .dio_badr = 2, 88 .n_8255 = 1, 89 }, 90 [BOARD_ADLINK_PCI7248] = { 91 .name = "adl_pci-7248", 92 .dio_badr = 2, 93 .n_8255 = 2, 94 }, 95 [BOARD_ADLINK_PCI7296] = { 96 .name = "adl_pci-7296", 97 .dio_badr = 2, 98 .n_8255 = 4, 99 }, 100 [BOARD_CB_PCIDIO24] = { 101 .name = "cb_pci-dio24", 102 .dio_badr = 2, 103 .n_8255 = 1, 104 }, 105 [BOARD_CB_PCIDIO24H] = { 106 .name = "cb_pci-dio24h", 107 .dio_badr = 2, 108 .n_8255 = 1, 109 }, 110 [BOARD_CB_PCIDIO48H_OLD] = { 111 .name = "cb_pci-dio48h", 112 .dio_badr = 1, 113 .n_8255 = 2, 114 }, 115 [BOARD_CB_PCIDIO48H_NEW] = { 116 .name = "cb_pci-dio48h", 117 .dio_badr = 2, 118 .n_8255 = 2, 119 }, 120 [BOARD_CB_PCIDIO96H] = { 121 .name = "cb_pci-dio96h", 122 .dio_badr = 2, 123 .n_8255 = 4, 124 }, 125 [BOARD_NI_PCIDIO96] = { 126 .name = "ni_pci-dio-96", 127 .dio_badr = 1, 128 .n_8255 = 4, 129 .has_mite = 1, 130 }, 131 [BOARD_NI_PCIDIO96B] = { 132 .name = "ni_pci-dio-96b", 133 .dio_badr = 1, 134 .n_8255 = 4, 135 .has_mite = 1, 136 }, 137 [BOARD_NI_PXI6508] = { 138 .name = "ni_pxi-6508", 139 .dio_badr = 1, 140 .n_8255 = 4, 141 .has_mite = 1, 142 }, 143 [BOARD_NI_PCI6503] = { 144 .name = "ni_pci-6503", 145 .dio_badr = 1, 146 .n_8255 = 1, 147 .has_mite = 1, 148 }, 149 [BOARD_NI_PCI6503B] = { 150 .name = "ni_pci-6503b", 151 .dio_badr = 1, 152 .n_8255 = 1, 153 .has_mite = 1, 154 }, 155 [BOARD_NI_PCI6503X] = { 156 .name = "ni_pci-6503x", 157 .dio_badr = 1, 158 .n_8255 = 1, 159 .has_mite = 1, 160 }, 161 [BOARD_NI_PXI_6503] = { 162 .name = "ni_pxi-6503", 163 .dio_badr = 1, 164 .n_8255 = 1, 165 .has_mite = 1, 166 }, 167 }; 168 169 /* ripped from mite.h and mite_setup2() to avoid mite dependency */ 170 #define MITE_IODWBSR 0xc0 /* IO Device Window Base Size Register */ 171 #define WENAB BIT(7) /* window enable */ 172 173 static int pci_8255_mite_init(struct pci_dev *pcidev) 174 { 175 void __iomem *mite_base; 176 u32 main_phys_addr; 177 178 /* ioremap the MITE registers (BAR 0) temporarily */ 179 mite_base = pci_ioremap_bar(pcidev, 0); 180 if (!mite_base) 181 return -ENOMEM; 182 183 /* set data window to main registers (BAR 1) */ 184 main_phys_addr = pci_resource_start(pcidev, 1); 185 writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR); 186 187 /* finished with MITE registers */ 188 iounmap(mite_base); 189 return 0; 190 } 191 192 static int pci_8255_auto_attach(struct comedi_device *dev, 193 unsigned long context) 194 { 195 struct pci_dev *pcidev = comedi_to_pci_dev(dev); 196 const struct pci_8255_boardinfo *board = NULL; 197 struct comedi_subdevice *s; 198 int ret; 199 int i; 200 201 if (context < ARRAY_SIZE(pci_8255_boards)) 202 board = &pci_8255_boards[context]; 203 if (!board) 204 return -ENODEV; 205 dev->board_ptr = board; 206 dev->board_name = board->name; 207 208 ret = comedi_pci_enable(dev); 209 if (ret) 210 return ret; 211 212 if (board->has_mite) { 213 ret = pci_8255_mite_init(pcidev); 214 if (ret) 215 return ret; 216 } 217 218 if ((pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM)) { 219 dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr); 220 if (!dev->mmio) 221 return -ENOMEM; 222 } else { 223 dev->iobase = pci_resource_start(pcidev, board->dio_badr); 224 } 225 226 /* 227 * One, two, or four subdevices are setup by this driver depending 228 * on the number of channels provided by the board. Each subdevice 229 * has 24 channels supported by the 8255 module. 230 */ 231 ret = comedi_alloc_subdevices(dev, board->n_8255); 232 if (ret) 233 return ret; 234 235 for (i = 0; i < board->n_8255; i++) { 236 s = &dev->subdevices[i]; 237 if (dev->mmio) 238 ret = subdev_8255_mm_init(dev, s, NULL, i * I8255_SIZE); 239 else 240 ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE); 241 if (ret) 242 return ret; 243 } 244 245 return 0; 246 } 247 248 static struct comedi_driver pci_8255_driver = { 249 .driver_name = "8255_pci", 250 .module = THIS_MODULE, 251 .auto_attach = pci_8255_auto_attach, 252 .detach = comedi_pci_detach, 253 }; 254 255 static int pci_8255_pci_probe(struct pci_dev *dev, 256 const struct pci_device_id *id) 257 { 258 return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data); 259 } 260 261 static const struct pci_device_id pci_8255_pci_table[] = { 262 { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 }, 263 { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 }, 264 { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 }, 265 { PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 }, 266 { PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H }, 267 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, 0x0000, 0x0000), 268 .driver_data = BOARD_CB_PCIDIO48H_OLD }, 269 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b), 270 .driver_data = BOARD_CB_PCIDIO48H_NEW }, 271 { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H }, 272 { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 }, 273 { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B }, 274 { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 }, 275 { PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 }, 276 { PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B }, 277 { PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X }, 278 { PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 }, 279 { 0 } 280 }; 281 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table); 282 283 static struct pci_driver pci_8255_pci_driver = { 284 .name = "8255_pci", 285 .id_table = pci_8255_pci_table, 286 .probe = pci_8255_pci_probe, 287 .remove = comedi_pci_auto_unconfig, 288 }; 289 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver); 290 291 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards"); 292 MODULE_AUTHOR("Comedi https://www.comedi.org"); 293 MODULE_LICENSE("GPL"); 294