drivers/net/can/softing/softing_cs.c

   1 /*
   2  * Copyright (C) 2008-2010
   3  *
   4  * - Kurt Van Dijck, EIA Electronics
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the version 2 of the GNU General Public License
   8  * as published by the Free Software Foundation
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22
  23 #include <pcmcia/cistpl.h>
  24 #include <pcmcia/ds.h>
  25
  26 #include "softing_platform.h"
  27
  28 static int softingcs_index;
  29 static DEFINE_SPINLOCK(softingcs_index_lock);
  30
  31 static int softingcs_reset(struct platform_device *pdev, int v);
  32 static int softingcs_enable_irq(struct platform_device *pdev, int v);
  33
  34 /*
  35  * platform_data descriptions
  36  */
  37 #define MHZ (1000*1000)
  38 static const struct softing_platform_data softingcs_platform_data[] = {
  39 {
  40         .name = "CANcard",
  41         .manf = 0x0168, .prod = 0x001,
  42         .generation = 1,
  43         .nbus = 2,
  44         .freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
  45         .dpram_size = 0x0800,
  46         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
  47         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
  48         .app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
  49         .reset = softingcs_reset,
  50         .enable_irq = softingcs_enable_irq,
  51 }, {
  52         .name = "CANcard-NEC",
  53         .manf = 0x0168, .prod = 0x002,
  54         .generation = 1,
  55         .nbus = 2,
  56         .freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
  57         .dpram_size = 0x0800,
  58         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
  59         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
  60         .app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
  61         .reset = softingcs_reset,
  62         .enable_irq = softingcs_enable_irq,
  63 }, {
  64         .name = "CANcard-SJA",
  65         .manf = 0x0168, .prod = 0x004,
  66         .generation = 1,
  67         .nbus = 2,
  68         .freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
  69         .dpram_size = 0x0800,
  70         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
  71         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
  72         .app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
  73         .reset = softingcs_reset,
  74         .enable_irq = softingcs_enable_irq,
  75 }, {
  76         .name = "CANcard-2",
  77         .manf = 0x0168, .prod = 0x005,
  78         .generation = 2,
  79         .nbus = 2,
  80         .freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
  81         .dpram_size = 0x1000,
  82         .boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
  83         .load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
  84         .app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
  85         .reset = softingcs_reset,
  86         .enable_irq = NULL,
  87 }, {
  88         .name = "Vector-CANcard",
  89         .manf = 0x0168, .prod = 0x081,
  90         .generation = 1,
  91         .nbus = 2,
  92         .freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
  93         .dpram_size = 0x0800,
  94         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
  95         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
  96         .app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
  97         .reset = softingcs_reset,
  98         .enable_irq = softingcs_enable_irq,
  99 }, {
 100         .name = "Vector-CANcard-SJA",
 101         .manf = 0x0168, .prod = 0x084,
 102         .generation = 1,
 103         .nbus = 2,
 104         .freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
 105         .dpram_size = 0x0800,
 106         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
 107         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
 108         .app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
 109         .reset = softingcs_reset,
 110         .enable_irq = softingcs_enable_irq,
 111 }, {
 112         .name = "Vector-CANcard-2",
 113         .manf = 0x0168, .prod = 0x085,
 114         .generation = 2,
 115         .nbus = 2,
 116         .freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
 117         .dpram_size = 0x1000,
 118         .boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
 119         .load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
 120         .app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
 121         .reset = softingcs_reset,
 122         .enable_irq = NULL,
 123 }, {
 124         .name = "EDICcard-NEC",
 125         .manf = 0x0168, .prod = 0x102,
 126         .generation = 1,
 127         .nbus = 2,
 128         .freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
 129         .dpram_size = 0x0800,
 130         .boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
 131         .load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
 132         .app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
 133         .reset = softingcs_reset,
 134         .enable_irq = softingcs_enable_irq,
 135 }, {
 136         .name = "EDICcard-2",
 137         .manf = 0x0168, .prod = 0x105,
 138         .generation = 2,
 139         .nbus = 2,
 140         .freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
 141         .dpram_size = 0x1000,
 142         .boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
 143         .load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
 144         .app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
 145         .reset = softingcs_reset,
 146         .enable_irq = NULL,
 147 }, {
 148         0, 0,
 149 },
 150 };
 151
 152 MODULE_FIRMWARE(fw_dir "bcard.bin");
 153 MODULE_FIRMWARE(fw_dir "ldcard.bin");
 154 MODULE_FIRMWARE(fw_dir "cancard.bin");
 155 MODULE_FIRMWARE(fw_dir "cansja.bin");
 156
 157 MODULE_FIRMWARE(fw_dir "bcard2.bin");
 158 MODULE_FIRMWARE(fw_dir "ldcard2.bin");
 159 MODULE_FIRMWARE(fw_dir "cancrd2.bin");
 160
 161 static const struct softing_platform_data
 162 *softingcs_find_platform_data(unsigned int manf, unsigned int prod)
 163 {
 164         const struct softing_platform_data *lp;
 165
 166         for (lp = softingcs_platform_data; lp->manf; ++lp) {
 167                 if ((lp->manf == manf) && (lp->prod == prod))
 168                         return lp;
 169         }
 170         return NULL;
 171 }
 172
 173 /*
 174  * platformdata callbacks
 175  */
 176 static int softingcs_reset(struct platform_device *pdev, int v)
 177 {
 178         struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);
 179
 180         dev_dbg(&pdev->dev, "pcmcia config [2] %02x\n", v ? 0 : 0x20);
 181         return pcmcia_write_config_byte(pcmcia, 2, v ? 0 : 0x20);
 182 }
 183
 184 static int softingcs_enable_irq(struct platform_device *pdev, int v)
 185 {
 186         struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);
 187
 188         dev_dbg(&pdev->dev, "pcmcia config [0] %02x\n", v ? 0x60 : 0);
 189         return pcmcia_write_config_byte(pcmcia, 0, v ? 0x60 : 0);
 190 }
 191
 192 /*
 193  * pcmcia check
 194  */
 195 static int softingcs_probe_config(struct pcmcia_device *pcmcia, void *priv_data)
 196 {
 197         struct softing_platform_data *pdat = priv_data;
 198         struct resource *pres;
 199         int memspeed = 0;
 200
 201         WARN_ON(!pdat);
 202         pres = pcmcia->resource[PCMCIA_IOMEM_0];
 203         if (resource_size(pres) < 0x1000)
 204                 return -ERANGE;
 205
 206         pres->flags |= WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 207         if (pdat->generation < 2) {
 208                 pres->flags |= WIN_USE_WAIT | WIN_DATA_WIDTH_8;
 209                 memspeed = 3;
 210         } else {
 211                 pres->flags |= WIN_DATA_WIDTH_16;
 212         }
 213         return pcmcia_request_window(pcmcia, pres, memspeed);
 214 }
 215
 216 static void softingcs_remove(struct pcmcia_device *pcmcia)
 217 {
 218         struct platform_device *pdev = pcmcia->priv;
 219
 220         /* free bits */
 221         platform_device_unregister(pdev);
 222         /* release pcmcia stuff */
 223         pcmcia_disable_device(pcmcia);
 224 }
 225
 226 /*
 227  * platform_device wrapper
 228  * pdev->resource has 2 entries: io & irq
 229  */
 230 static void softingcs_pdev_release(struct device *dev)
 231 {
 232         struct platform_device *pdev = to_platform_device(dev);
 233         kfree(pdev);
 234 }
 235
 236 static int softingcs_probe(struct pcmcia_device *pcmcia)
 237 {
 238         int ret;
 239         struct platform_device *pdev;
 240         const struct softing_platform_data *pdat;
 241         struct resource *pres;
 242         struct dev {
 243                 struct platform_device pdev;
 244                 struct resource res[2];
 245         } *dev;
 246
 247         /* find matching platform_data */
 248         pdat = softingcs_find_platform_data(pcmcia->manf_id, pcmcia->card_id);
 249         if (!pdat)
 250                 return -ENOTTY;
 251
 252         /* setup pcmcia device */
 253         pcmcia->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IOMEM |
 254                 CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC;
 255         ret = pcmcia_loop_config(pcmcia, softingcs_probe_config, (void *)pdat);
 256         if (ret)
 257                 goto pcmcia_failed;
 258
 259         ret = pcmcia_enable_device(pcmcia);
 260         if (ret < 0)
 261                 goto pcmcia_failed;
 262
 263         pres = pcmcia->resource[PCMCIA_IOMEM_0];
 264         if (!pres) {
 265                 ret = -EBADF;
 266                 goto pcmcia_bad;
 267         }
 268
 269         /* create softing platform device */
 270         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 271         if (!dev) {
 272                 ret = -ENOMEM;
 273                 goto mem_failed;
 274         }
 275         dev->pdev.resource = dev->res;
 276         dev->pdev.num_resources = ARRAY_SIZE(dev->res);
 277         dev->pdev.dev.release = softingcs_pdev_release;
 278
 279         pdev = &dev->pdev;
 280         pdev->dev.platform_data = (void *)pdat;
 281         pdev->dev.parent = &pcmcia->dev;
 282         pcmcia->priv = pdev;
 283
 284         /* platform device resources */
 285         pdev->resource[0].flags = IORESOURCE_MEM;
 286         pdev->resource[0].start = pres->start;
 287         pdev->resource[0].end = pres->end;
 288
 289         pdev->resource[1].flags = IORESOURCE_IRQ;
 290         pdev->resource[1].start = pcmcia->irq;
 291         pdev->resource[1].end = pdev->resource[1].start;
 292
 293         /* platform device setup */
 294         spin_lock(&softingcs_index_lock);
 295         pdev->id = softingcs_index++;
 296         spin_unlock(&softingcs_index_lock);
 297         pdev->name = "softing";
 298         dev_set_name(&pdev->dev, "softingcs.%i", pdev->id);
 299         ret = platform_device_register(pdev);
 300         if (ret < 0)
 301                 goto platform_failed;
 302
 303         dev_info(&pcmcia->dev, "created %s\n", dev_name(&pdev->dev));
 304         return 0;
 305
 306 platform_failed:
 307         kfree(dev);
 308 mem_failed:
 309 pcmcia_bad:
 310 pcmcia_failed:
 311         pcmcia_disable_device(pcmcia);
 312         pcmcia->priv = NULL;
 313         return ret ?: -ENODEV;
 314 }
 315
 316 static const struct pcmcia_device_id softingcs_ids[] = {
 317         /* softing */
 318         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0001),
 319         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0002),
 320         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0004),
 321         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0005),
 322         /* vector, manufacturer? */
 323         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0081),
 324         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0084),
 325         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0085),
 326         /* EDIC */
 327         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0102),
 328         PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0105),
 329         PCMCIA_DEVICE_NULL,
 330 };
 331
 332 MODULE_DEVICE_TABLE(pcmcia, softingcs_ids);
 333
 334 static struct pcmcia_driver softingcs_driver = {
 335         .owner          = THIS_MODULE,
 336         .name           = "softingcs",
 337         .id_table       = softingcs_ids,
 338         .probe          = softingcs_probe,
 339         .remove         = softingcs_remove,
 340 };
 341
 342 module_pcmcia_driver(softingcs_driver);
 343
 344 MODULE_DESCRIPTION("softing CANcard driver"
 345                 ", links PCMCIA card to softing driver");
 346 MODULE_LICENSE("GPL v2");