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  *
   7  * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
   8  *
   9  */
  10
  11 #include <linux/usb.h>
  12 #include <linux/io.h>
  13 #include <linux/platform_device.h>
  14
  15 #include "../core/hcd.h"
  16 #include "isp1760-hcd.h"
  17
  18 #ifdef CONFIG_PPC_OF
  19 #include <linux/of.h>
  20 #include <linux/of_platform.h>
  21 #endif
  22
  23 #ifdef CONFIG_PCI
  24 #include <linux/pci.h>
  25 #endif
  26
  27 #ifdef CONFIG_PPC_OF
  28 static int of_isp1760_probe(struct of_device *dev,
  29                 const struct of_device_id *match)
  30 {
  31         struct usb_hcd *hcd;
  32         struct device_node *dp = dev->node;
  33         struct resource *res;
  34         struct resource memory;
  35         struct of_irq oirq;
  36         int virq;
  37         u64 res_len;
  38         int ret;
  39         const unsigned int *prop;
  40         unsigned int devflags = 0;
  41
  42         ret = of_address_to_resource(dp, 0, &memory);
  43         if (ret)
  44                 return -ENXIO;
  45
  46         res = request_mem_region(memory.start, memory.end - memory.start + 1,
  47                         dev_name(&dev->dev));
  48         if (!res)
  49                 return -EBUSY;
  50
  51         res_len = memory.end - memory.start + 1;
  52
  53         if (of_irq_map_one(dp, 0, &oirq)) {
  54                 ret = -ENODEV;
  55                 goto release_reg;
  56         }
  57
  58         virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
  59                         oirq.size);
  60
  61         if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
  62                 devflags |= ISP1760_FLAG_ISP1761;
  63
  64         /* Some systems wire up only 16 of the 32 data lines */
  65         prop = of_get_property(dp, "bus-width", NULL);
  66         if (prop && *prop == 16)
  67                 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
  68
  69         if (of_get_property(dp, "port1-otg", NULL) != NULL)
  70                 devflags |= ISP1760_FLAG_OTG_EN;
  71
  72         if (of_get_property(dp, "analog-oc", NULL) != NULL)
  73                 devflags |= ISP1760_FLAG_ANALOG_OC;
  74
  75         if (of_get_property(dp, "dack-polarity", NULL) != NULL)
  76                 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
  77
  78         if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
  79                 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
  80
  81         hcd = isp1760_register(memory.start, res_len, virq,
  82                 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
  83                 devflags);
  84         if (IS_ERR(hcd)) {
  85                 ret = PTR_ERR(hcd);
  86                 goto release_reg;
  87         }
  88
  89         dev_set_drvdata(&dev->dev, hcd);
  90         return ret;
  91
  92 release_reg:
  93         release_mem_region(memory.start, memory.end - memory.start + 1);
  94         return ret;
  95 }
  96
  97 static int of_isp1760_remove(struct of_device *dev)
  98 {
  99         struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
 100
 101         dev_set_drvdata(&dev->dev, NULL);
 102
 103         usb_remove_hcd(hcd);
 104         iounmap(hcd->regs);
 105         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 106         usb_put_hcd(hcd);
 107         return 0;
 108 }
 109
 110 static struct of_device_id of_isp1760_match[] = {
 111         {
 112                 .compatible = "nxp,usb-isp1760",
 113         },
 114         {
 115                 .compatible = "nxp,usb-isp1761",
 116         },
 117         { },
 118 };
 119 MODULE_DEVICE_TABLE(of, of_isp1760_match);
 120
 121 static struct of_platform_driver isp1760_of_driver = {
 122         .name           = "nxp-isp1760",
 123         .match_table    = of_isp1760_match,
 124         .probe          = of_isp1760_probe,
 125         .remove         = of_isp1760_remove,
 126 };
 127 #endif
 128
 129 #ifdef CONFIG_PCI
 130 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
 131                 const struct pci_device_id *id)
 132 {
 133         u8 latency, limit;
 134         __u32 reg_data;
 135         int retry_count;
 136         struct usb_hcd *hcd;
 137         unsigned int devflags = 0;
 138         int ret_status = 0;
 139
 140         resource_size_t pci_mem_phy0;
 141         resource_size_t memlength;
 142
 143         u8 __iomem *chip_addr;
 144         u8 __iomem *iobase;
 145         resource_size_t nxp_pci_io_base;
 146         resource_size_t iolength;
 147
 148         if (usb_disabled())
 149                 return -ENODEV;
 150
 151         if (pci_enable_device(dev) < 0)
 152                 return -ENODEV;
 153
 154         if (!dev->irq)
 155                 return -ENODEV;
 156
 157         /* Grab the PLX PCI mem maped port start address we need  */
 158         nxp_pci_io_base = pci_resource_start(dev, 0);
 159         iolength = pci_resource_len(dev, 0);
 160
 161         if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
 162                 printk(KERN_ERR "request region #1\n");
 163                 return -EBUSY;
 164         }
 165
 166         iobase = ioremap_nocache(nxp_pci_io_base, iolength);
 167         if (!iobase) {
 168                 printk(KERN_ERR "ioremap #1\n");
 169                 ret_status = -ENOMEM;
 170                 goto cleanup1;
 171         }
 172         /* Grab the PLX PCI shared memory of the ISP 1761 we need  */
 173         pci_mem_phy0 = pci_resource_start(dev, 3);
 174         memlength = pci_resource_len(dev, 3);
 175         if (memlength < 0xffff) {
 176                 printk(KERN_ERR "memory length for this resource is wrong\n");
 177                 ret_status = -ENOMEM;
 178                 goto cleanup2;
 179         }
 180
 181         if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
 182                 printk(KERN_ERR "host controller already in use\n");
 183                 ret_status = -EBUSY;
 184                 goto cleanup2;
 185         }
 186
 187         /* map available memory */
 188         chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
 189         if (!chip_addr) {
 190                 printk(KERN_ERR "Error ioremap failed\n");
 191                 ret_status = -ENOMEM;
 192                 goto cleanup3;
 193         }
 194
 195         /* bad pci latencies can contribute to overruns */
 196         pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
 197         if (latency) {
 198                 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
 199                 if (limit && limit < latency)
 200                         pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
 201         }
 202
 203         /* Try to check whether we can access Scratch Register of
 204          * Host Controller or not. The initial PCI access is retried until
 205          * local init for the PCI bridge is completed
 206          */
 207         retry_count = 20;
 208         reg_data = 0;
 209         while ((reg_data != 0xFACE) && retry_count) {
 210                 /*by default host is in 16bit mode, so
 211                  * io operations at this stage must be 16 bit
 212                  * */
 213                 writel(0xface, chip_addr + HC_SCRATCH_REG);
 214                 udelay(100);
 215                 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
 216                 retry_count--;
 217         }
 218
 219         iounmap(chip_addr);
 220
 221         /* Host Controller presence is detected by writing to scratch register
 222          * and reading back and checking the contents are same or not
 223          */
 224         if (reg_data != 0xFACE) {
 225                 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
 226                 ret_status = -ENOMEM;
 227                 goto cleanup3;
 228         }
 229
 230         pci_set_master(dev);
 231
 232         /* configure PLX PCI chip to pass interrupts */
 233 #define PLX_INT_CSR_REG 0x68
 234         reg_data = readl(iobase + PLX_INT_CSR_REG);
 235         reg_data |= 0x900;
 236         writel(reg_data, iobase + PLX_INT_CSR_REG);
 237
 238         dev->dev.dma_mask = NULL;
 239         hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
 240                 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
 241                 devflags);
 242         if (IS_ERR(hcd)) {
 243                 ret_status = -ENODEV;
 244                 goto cleanup3;
 245         }
 246
 247         /* done with PLX IO access */
 248         iounmap(iobase);
 249         release_mem_region(nxp_pci_io_base, iolength);
 250
 251         pci_set_drvdata(dev, hcd);
 252         return 0;
 253
 254 cleanup3:
 255         release_mem_region(pci_mem_phy0, memlength);
 256 cleanup2:
 257         iounmap(iobase);
 258 cleanup1:
 259         release_mem_region(nxp_pci_io_base, iolength);
 260         return ret_status;
 261 }
 262
 263 static void isp1761_pci_remove(struct pci_dev *dev)
 264 {
 265         struct usb_hcd *hcd;
 266
 267         hcd = pci_get_drvdata(dev);
 268
 269         usb_remove_hcd(hcd);
 270         iounmap(hcd->regs);
 271         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 272         usb_put_hcd(hcd);
 273
 274         pci_disable_device(dev);
 275 }
 276
 277 static void isp1761_pci_shutdown(struct pci_dev *dev)
 278 {
 279         printk(KERN_ERR "ips1761_pci_shutdown\n");
 280 }
 281
 282 static const struct pci_device_id isp1760_plx [] = {
 283         {
 284                 .class          = PCI_CLASS_BRIDGE_OTHER << 8,
 285                 .class_mask     = ~0,
 286                 .vendor         = PCI_VENDOR_ID_PLX,
 287                 .device         = 0x5406,
 288                 .subvendor      = PCI_VENDOR_ID_PLX,
 289                 .subdevice      = 0x9054,
 290         },
 291         { }
 292 };
 293 MODULE_DEVICE_TABLE(pci, isp1760_plx);
 294
 295 static struct pci_driver isp1761_pci_driver = {
 296         .name =         "isp1760",
 297         .id_table =     isp1760_plx,
 298         .probe =        isp1761_pci_probe,
 299         .remove =       isp1761_pci_remove,
 300         .shutdown =     isp1761_pci_shutdown,
 301 };
 302 #endif
 303
 304 static int __devinit isp1760_plat_probe(struct platform_device *pdev)
 305 {
 306         int ret = 0;
 307         struct usb_hcd *hcd;
 308         struct resource *mem_res;
 309         struct resource *irq_res;
 310         resource_size_t mem_size;
 311         unsigned long irqflags = IRQF_SHARED | IRQF_DISABLED;
 312
 313         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 314         if (!mem_res) {
 315                 pr_warning("isp1760: Memory resource not available\n");
 316                 ret = -ENODEV;
 317                 goto out;
 318         }
 319         mem_size = resource_size(mem_res);
 320         if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
 321                 pr_warning("isp1760: Cannot reserve the memory resource\n");
 322                 ret = -EBUSY;
 323                 goto out;
 324         }
 325
 326         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 327         if (!irq_res) {
 328                 pr_warning("isp1760: IRQ resource not available\n");
 329                 return -ENODEV;
 330         }
 331         irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
 332
 333         hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
 334                                irqflags, &pdev->dev, dev_name(&pdev->dev), 0);
 335         if (IS_ERR(hcd)) {
 336                 pr_warning("isp1760: Failed to register the HCD device\n");
 337                 ret = -ENODEV;
 338                 goto cleanup;
 339         }
 340
 341         pr_info("ISP1760 USB device initialised\n");
 342         return ret;
 343
 344 cleanup:
 345         release_mem_region(mem_res->start, mem_size);
 346 out:
 347         return ret;
 348 }
 349
 350 static int __devexit isp1760_plat_remove(struct platform_device *pdev)
 351 {
 352         struct resource *mem_res;
 353         resource_size_t mem_size;
 354
 355         mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 356         mem_size = resource_size(mem_res);
 357         release_mem_region(mem_res->start, mem_size);
 358
 359         return 0;
 360 }
 361
 362 static struct platform_driver isp1760_plat_driver = {
 363         .probe  = isp1760_plat_probe,
 364         .remove = __devexit_p(isp1760_plat_remove),
 365         .driver = {
 366                 .name   = "isp1760",
 367         },
 368 };
 369
 370 static int __init isp1760_init(void)
 371 {
 372         int ret, any_ret = -ENODEV;
 373
 374         init_kmem_once();
 375
 376         ret = platform_driver_register(&isp1760_plat_driver);
 377         if (!ret)
 378                 any_ret = 0;
 379 #ifdef CONFIG_PPC_OF
 380         ret = of_register_platform_driver(&isp1760_of_driver);
 381         if (!ret)
 382                 any_ret = 0;
 383 #endif
 384 #ifdef CONFIG_PCI
 385         ret = pci_register_driver(&isp1761_pci_driver);
 386         if (!ret)
 387                 any_ret = 0;
 388 #endif
 389
 390         if (any_ret)
 391                 deinit_kmem_cache();
 392         return any_ret;
 393 }
 394 module_init(isp1760_init);
 395
 396 static void __exit isp1760_exit(void)
 397 {
 398         platform_driver_unregister(&isp1760_plat_driver);
 399 #ifdef CONFIG_PPC_OF
 400         of_unregister_platform_driver(&isp1760_of_driver);
 401 #endif
 402 #ifdef CONFIG_PCI
 403         pci_unregister_driver(&isp1761_pci_driver);
 404 #endif
 405         deinit_kmem_cache();
 406 }
 407 module_exit(isp1760_exit);