drivers/usb/host/isp1760-if.c

   1 /*
   2  * Glue code for the ISP1760 driver and bus
   3  * Currently there is support for
   4  * - OpenFirmware
   5  * - PCI
   6  * - PDEV (generic platform device centralized driver model)
   7  *
   8  * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
   9  *
  10  */
  11
  12 #include <linux/usb.h>
  13 #include <linux/io.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/usb/isp1760.h>
  17 #include <linux/usb/hcd.h>
  18
  19 #include "isp1760-hcd.h"
  20
  21 #ifdef CONFIG_PPC_OF
  22 #include <linux/of.h>
  23 #include <linux/of_platform.h>
  24 #endif
  25
  26 #ifdef CONFIG_PCI
  27 #include <linux/pci.h>
  28 #endif
  29
  30 #ifdef CONFIG_PPC_OF
  31 static int of_isp1760_probe(struct platform_device *dev)
  32 {
  33         struct usb_hcd *hcd;
  34         struct device_node *dp = dev->dev.of_node;
  35         struct resource *res;
  36         struct resource memory;
  37         struct of_irq oirq;
  38         int virq;
  39         resource_size_t res_len;
  40         int ret;
  41         const unsigned int *prop;
  42         unsigned int devflags = 0;
  43
  44         ret = of_address_to_resource(dp, 0, &memory);
  45         if (ret)
  46                 return -ENXIO;
  47
  48         res_len = resource_size(&memory);
  49
  50         res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
  51         if (!res)
  52                 return -EBUSY;
  53
  54         if (of_irq_map_one(dp, 0, &oirq)) {
  55                 ret = -ENODEV;
  56                 goto release_reg;
  57         }
  58
  59         virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
  60                         oirq.size);
  61
  62         if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
  63                 devflags |= ISP1760_FLAG_ISP1761;
  64
  65         /* Some systems wire up only 16 of the 32 data lines */
  66         prop = of_get_property(dp, "bus-width", NULL);
  67         if (prop && *prop == 16)
  68                 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
  69
  70         if (of_get_property(dp, "port1-otg", NULL) != NULL)
  71                 devflags |= ISP1760_FLAG_OTG_EN;
  72
  73         if (of_get_property(dp, "analog-oc", NULL) != NULL)
  74                 devflags |= ISP1760_FLAG_ANALOG_OC;
  75
  76         if (of_get_property(dp, "dack-polarity", NULL) != NULL)
  77                 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
  78
  79         if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
  80                 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
  81
  82         hcd = isp1760_register(memory.start, res_len, virq,
  83                 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
  84                 devflags);
  85         if (IS_ERR(hcd)) {
  86                 ret = PTR_ERR(hcd);
  87                 goto release_reg;
  88         }
  89
  90         dev_set_drvdata(&dev->dev, hcd);
  91         return ret;
  92
  93 release_reg:
  94         release_mem_region(memory.start, res_len);
  95         return ret;
  96 }
  97
  98 static int of_isp1760_remove(struct platform_device *dev)
  99 {
 100         struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
 101
 102         dev_set_drvdata(&dev->dev, NULL);
 103
 104         usb_remove_hcd(hcd);
 105         iounmap(hcd->regs);
 106         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 107         usb_put_hcd(hcd);
 108         return 0;
 109 }
 110
 111 static const struct of_device_id of_isp1760_match[] = {
 112         {
 113                 .compatible = "nxp,usb-isp1760",
 114         },
 115         {
 116                 .compatible = "nxp,usb-isp1761",
 117         },
 118         { },
 119 };
 120 MODULE_DEVICE_TABLE(of, of_isp1760_match);
 121
 122 static struct platform_driver isp1760_of_driver = {
 123         .driver = {
 124                 .name = "nxp-isp1760",
 125                 .owner = THIS_MODULE,
 126                 .of_match_table = of_isp1760_match,
 127         },
 128         .probe          = of_isp1760_probe,
 129         .remove         = of_isp1760_remove,
 130 };
 131 #endif
 132
 133 #ifdef CONFIG_PCI
 134 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
 135                 const struct pci_device_id *id)
 136 {
 137         u8 latency, limit;
 138         __u32 reg_data;
 139         int retry_count;
 140         struct usb_hcd *hcd;
 141         unsigned int devflags = 0;
 142         int ret_status = 0;
 143
 144         resource_size_t pci_mem_phy0;
 145         resource_size_t memlength;
 146
 147         u8 __iomem *chip_addr;
 148         u8 __iomem *iobase;
 149         resource_size_t nxp_pci_io_base;
 150         resource_size_t iolength;
 151
 152         if (usb_disabled())
 153                 return -ENODEV;
 154
 155         if (pci_enable_device(dev) < 0)
 156                 return -ENODEV;
 157
 158         if (!dev->irq)
 159                 return -ENODEV;
 160
 161         /* Grab the PLX PCI mem maped port start address we need  */
 162         nxp_pci_io_base = pci_resource_start(dev, 0);
 163         iolength = pci_resource_len(dev, 0);
 164
 165         if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
 166                 printk(KERN_ERR "request region #1\n");
 167                 return -EBUSY;
 168         }
 169
 170         iobase = ioremap_nocache(nxp_pci_io_base, iolength);
 171         if (!iobase) {
 172                 printk(KERN_ERR "ioremap #1\n");
 173                 ret_status = -ENOMEM;
 174                 goto cleanup1;
 175         }
 176         /* Grab the PLX PCI shared memory of the ISP 1761 we need  */
 177         pci_mem_phy0 = pci_resource_start(dev, 3);
 178         memlength = pci_resource_len(dev, 3);
 179         if (memlength < 0xffff) {
 180                 printk(KERN_ERR "memory length for this resource is wrong\n");
 181                 ret_status = -ENOMEM;
 182                 goto cleanup2;
 183         }
 184
 185         if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
 186                 printk(KERN_ERR "host controller already in use\n");
 187                 ret_status = -EBUSY;
 188                 goto cleanup2;
 189         }
 190
 191         /* map available memory */
 192         chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
 193         if (!chip_addr) {
 194                 printk(KERN_ERR "Error ioremap failed\n");
 195                 ret_status = -ENOMEM;
 196                 goto cleanup3;
 197         }
 198
 199         /* bad pci latencies can contribute to overruns */
 200         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
 201         if (latency) {
 202                 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
 203                 if (limit && limit < latency)
 204                         pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
 205         }
 206
 207         /* Try to check whether we can access Scratch Register of
 208          * Host Controller or not. The initial PCI access is retried until
 209          * local init for the PCI bridge is completed
 210          */
 211         retry_count = 20;
 212         reg_data = 0;
 213         while ((reg_data != 0xFACE) && retry_count) {
 214                 /*by default host is in 16bit mode, so
 215                  * io operations at this stage must be 16 bit
 216                  * */
 217                 writel(0xface, chip_addr + HC_SCRATCH_REG);
 218                 udelay(100);
 219                 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
 220                 retry_count--;
 221         }
 222
 223         iounmap(chip_addr);
 224
 225         /* Host Controller presence is detected by writing to scratch register
 226          * and reading back and checking the contents are same or not
 227          */
 228         if (reg_data != 0xFACE) {
 229                 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
 230                 ret_status = -ENOMEM;
 231                 goto cleanup3;
 232         }
 233
 234         pci_set_master(dev);
 235
 236         /* configure PLX PCI chip to pass interrupts */
 237 #define PLX_INT_CSR_REG 0x68
 238         reg_data = readl(iobase + PLX_INT_CSR_REG);
 239         reg_data |= 0x900;
 240         writel(reg_data, iobase + PLX_INT_CSR_REG);
 241
 242         dev->dev.dma_mask = NULL;
 243         hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
 244                 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
 245                 devflags);
 246         if (IS_ERR(hcd)) {
 247                 ret_status = -ENODEV;
 248                 goto cleanup3;
 249         }
 250
 251         /* done with PLX IO access */
 252         iounmap(iobase);
 253         release_mem_region(nxp_pci_io_base, iolength);
 254
 255         pci_set_drvdata(dev, hcd);
 256         return 0;
 257
 258 cleanup3:
 259         release_mem_region(pci_mem_phy0, memlength);
 260 cleanup2:
 261         iounmap(iobase);
 262 cleanup1:
 263         release_mem_region(nxp_pci_io_base, iolength);
 264         return ret_status;
 265 }
 266
 267 static void isp1761_pci_remove(struct pci_dev *dev)
 268 {
 269         struct usb_hcd *hcd;
 270
 271         hcd = pci_get_drvdata(dev);
 272
 273         usb_remove_hcd(hcd);
 274         iounmap(hcd->regs);
 275         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 276         usb_put_hcd(hcd);
 277
 278         pci_disable_device(dev);
 279 }
 280
 281 static void isp1761_pci_shutdown(struct pci_dev *dev)
 282 {
 283         printk(KERN_ERR "ips1761_pci_shutdown\n");
 284 }
 285
 286 static const struct pci_device_id isp1760_plx [] = {
 287         {
 288                 .class          = PCI_CLASS_BRIDGE_OTHER << 8,
 289                 .class_mask     = ~0,
 290                 .vendor         = PCI_VENDOR_ID_PLX,
 291                 .device         = 0x5406,
 292                 .subvendor      = PCI_VENDOR_ID_PLX,
 293                 .subdevice      = 0x9054,
 294         },
 295         { }
 296 };
 297 MODULE_DEVICE_TABLE(pci, isp1760_plx);
 298
 299 static struct pci_driver isp1761_pci_driver = {
 300         .name =         "isp1760",
 301         .id_table =     isp1760_plx,
 302         .probe =        isp1761_pci_probe,
 303         .remove =       isp1761_pci_remove,
 304         .shutdown =     isp1761_pci_shutdown,
 305 };
 306 #endif
 307
 308 static int __devinit isp1760_plat_probe(struct platform_device *pdev)
 309 {
 310         int ret = 0;
 311         struct usb_hcd *hcd;
 312         struct resource *mem_res;
 313         struct resource *irq_res;
 314         resource_size_t mem_size;
 315         struct isp1760_platform_data *priv = pdev->dev.platform_data;
 316         unsigned int devflags = 0;
 317         unsigned long irqflags = IRQF_SHARED | IRQF_DISABLED;
 318
 319         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 320         if (!mem_res) {
 321                 pr_warning("isp1760: Memory resource not available\n");
 322                 ret = -ENODEV;
 323                 goto out;
 324         }
 325         mem_size = resource_size(mem_res);
 326         if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
 327                 pr_warning("isp1760: Cannot reserve the memory resource\n");
 328                 ret = -EBUSY;
 329                 goto out;
 330         }
 331
 332         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 333         if (!irq_res) {
 334                 pr_warning("isp1760: IRQ resource not available\n");
 335                 return -ENODEV;
 336         }
 337         irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
 338
 339         if (priv) {
 340                 if (priv->is_isp1761)
 341                         devflags |= ISP1760_FLAG_ISP1761;
 342                 if (priv->bus_width_16)
 343                         devflags |= ISP1760_FLAG_BUS_WIDTH_16;
 344                 if (priv->port1_otg)
 345                         devflags |= ISP1760_FLAG_OTG_EN;
 346                 if (priv->analog_oc)
 347                         devflags |= ISP1760_FLAG_ANALOG_OC;
 348                 if (priv->dack_polarity_high)
 349                         devflags |= ISP1760_FLAG_DACK_POL_HIGH;
 350                 if (priv->dreq_polarity_high)
 351                         devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
 352         }
 353
 354         hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
 355                                irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
 356         if (IS_ERR(hcd)) {
 357                 pr_warning("isp1760: Failed to register the HCD device\n");
 358                 ret = -ENODEV;
 359                 goto cleanup;
 360         }
 361
 362         pr_info("ISP1760 USB device initialised\n");
 363         return ret;
 364
 365 cleanup:
 366         release_mem_region(mem_res->start, mem_size);
 367 out:
 368         return ret;
 369 }
 370
 371 static int __devexit isp1760_plat_remove(struct platform_device *pdev)
 372 {
 373         struct resource *mem_res;
 374         resource_size_t mem_size;
 375
 376         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 377         mem_size = resource_size(mem_res);
 378         release_mem_region(mem_res->start, mem_size);
 379
 380         return 0;
 381 }
 382
 383 static struct platform_driver isp1760_plat_driver = {
 384         .probe  = isp1760_plat_probe,
 385         .remove = __devexit_p(isp1760_plat_remove),
 386         .driver = {
 387                 .name   = "isp1760",
 388         },
 389 };
 390
 391 static int __init isp1760_init(void)
 392 {
 393         int ret, any_ret = -ENODEV;
 394
 395         init_kmem_once();
 396
 397         ret = platform_driver_register(&isp1760_plat_driver);
 398         if (!ret)
 399                 any_ret = 0;
 400 #ifdef CONFIG_PPC_OF
 401         ret = platform_driver_register(&isp1760_of_driver);
 402         if (!ret)
 403                 any_ret = 0;
 404 #endif
 405 #ifdef CONFIG_PCI
 406         ret = pci_register_driver(&isp1761_pci_driver);
 407         if (!ret)
 408                 any_ret = 0;
 409 #endif
 410
 411         if (any_ret)
 412                 deinit_kmem_cache();
 413         return any_ret;
 414 }
 415 module_init(isp1760_init);
 416
 417 static void __exit isp1760_exit(void)
 418 {
 419         platform_driver_unregister(&isp1760_plat_driver);
 420 #ifdef CONFIG_PPC_OF
 421         platform_driver_unregister(&isp1760_of_driver);
 422 #endif
 423 #ifdef CONFIG_PCI
 424         pci_unregister_driver(&isp1761_pci_driver);
 425 #endif
 426         deinit_kmem_cache();
 427 }
 428 module_exit(isp1760_exit);