2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
6 * - PDEV (generic platform device centralized driver model)
12 #include <linux/usb.h>
14 #include <linux/platform_device.h>
15 #include <linux/usb/isp1760.h>
16 #include <linux/usb/hcd.h>
18 #include "isp1760-hcd.h"
22 #include <linux/of_platform.h>
26 #include <linux/pci.h>
30 static int of_isp1760_probe(struct platform_device *dev,
31 const struct of_device_id *match)
34 struct device_node *dp = dev->dev.of_node;
36 struct resource memory;
39 resource_size_t res_len;
41 const unsigned int *prop;
42 unsigned int devflags = 0;
44 ret = of_address_to_resource(dp, 0, &memory);
48 res_len = resource_size(&memory);
50 res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
54 if (of_irq_map_one(dp, 0, &oirq)) {
59 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
62 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
63 devflags |= ISP1760_FLAG_ISP1761;
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;
70 if (of_get_property(dp, "port1-otg", NULL) != NULL)
71 devflags |= ISP1760_FLAG_OTG_EN;
73 if (of_get_property(dp, "analog-oc", NULL) != NULL)
74 devflags |= ISP1760_FLAG_ANALOG_OC;
76 if (of_get_property(dp, "dack-polarity", NULL) != NULL)
77 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
79 if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
80 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
82 hcd = isp1760_register(memory.start, res_len, virq,
83 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
90 dev_set_drvdata(&dev->dev, hcd);
94 release_mem_region(memory.start, res_len);
98 static int of_isp1760_remove(struct platform_device *dev)
100 struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
102 dev_set_drvdata(&dev->dev, NULL);
106 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
111 static const struct of_device_id of_isp1760_match[] = {
113 .compatible = "nxp,usb-isp1760",
116 .compatible = "nxp,usb-isp1761",
120 MODULE_DEVICE_TABLE(of, of_isp1760_match);
122 static struct of_platform_driver isp1760_of_driver = {
124 .name = "nxp-isp1760",
125 .owner = THIS_MODULE,
126 .of_match_table = of_isp1760_match,
128 .probe = of_isp1760_probe,
129 .remove = of_isp1760_remove,
134 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
135 const struct pci_device_id *id)
141 unsigned int devflags = 0;
144 resource_size_t pci_mem_phy0;
145 resource_size_t memlength;
147 u8 __iomem *chip_addr;
149 resource_size_t nxp_pci_io_base;
150 resource_size_t iolength;
155 if (pci_enable_device(dev) < 0)
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);
165 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
166 printk(KERN_ERR "request region #1\n");
170 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
172 printk(KERN_ERR "ioremap #1\n");
173 ret_status = -ENOMEM;
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;
185 if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
186 printk(KERN_ERR "host controller already in use\n");
191 /* map available memory */
192 chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
194 printk(KERN_ERR "Error ioremap failed\n");
195 ret_status = -ENOMEM;
199 /* bad pci latencies can contribute to overruns */
200 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &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);
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
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
217 writel(0xface, chip_addr + HC_SCRATCH_REG);
219 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
225 /* Host Controller presence is detected by writing to scratch register
226 * and reading back and checking the contents are same or not
228 if (reg_data != 0xFACE) {
229 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
230 ret_status = -ENOMEM;
236 /* configure PLX PCI chip to pass interrupts */
237 #define PLX_INT_CSR_REG 0x68
238 reg_data = readl(iobase + PLX_INT_CSR_REG);
240 writel(reg_data, iobase + PLX_INT_CSR_REG);
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),
247 ret_status = -ENODEV;
251 /* done with PLX IO access */
253 release_mem_region(nxp_pci_io_base, iolength);
255 pci_set_drvdata(dev, hcd);
259 release_mem_region(pci_mem_phy0, memlength);
263 release_mem_region(nxp_pci_io_base, iolength);
267 static void isp1761_pci_remove(struct pci_dev *dev)
271 hcd = pci_get_drvdata(dev);
275 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
278 pci_disable_device(dev);
281 static void isp1761_pci_shutdown(struct pci_dev *dev)
283 printk(KERN_ERR "ips1761_pci_shutdown\n");
286 static const struct pci_device_id isp1760_plx [] = {
288 .class = PCI_CLASS_BRIDGE_OTHER << 8,
290 .vendor = PCI_VENDOR_ID_PLX,
292 .subvendor = PCI_VENDOR_ID_PLX,
297 MODULE_DEVICE_TABLE(pci, isp1760_plx);
299 static struct pci_driver isp1761_pci_driver = {
301 .id_table = isp1760_plx,
302 .probe = isp1761_pci_probe,
303 .remove = isp1761_pci_remove,
304 .shutdown = isp1761_pci_shutdown,
308 static int __devinit isp1760_plat_probe(struct platform_device *pdev)
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;
319 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
321 pr_warning("isp1760: Memory resource not available\n");
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");
332 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
334 pr_warning("isp1760: IRQ resource not available\n");
337 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
340 if (priv->is_isp1761)
341 devflags |= ISP1760_FLAG_ISP1761;
342 if (priv->bus_width_16)
343 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
345 devflags |= ISP1760_FLAG_OTG_EN;
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;
354 hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
355 irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
357 pr_warning("isp1760: Failed to register the HCD device\n");
362 pr_info("ISP1760 USB device initialised\n");
366 release_mem_region(mem_res->start, mem_size);
371 static int __devexit isp1760_plat_remove(struct platform_device *pdev)
373 struct resource *mem_res;
374 resource_size_t mem_size;
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);
383 static struct platform_driver isp1760_plat_driver = {
384 .probe = isp1760_plat_probe,
385 .remove = __devexit_p(isp1760_plat_remove),
391 static int __init isp1760_init(void)
393 int ret, any_ret = -ENODEV;
397 ret = platform_driver_register(&isp1760_plat_driver);
401 ret = of_register_platform_driver(&isp1760_of_driver);
406 ret = pci_register_driver(&isp1761_pci_driver);
415 module_init(isp1760_init);
417 static void __exit isp1760_exit(void)
419 platform_driver_unregister(&isp1760_plat_driver);
421 of_unregister_platform_driver(&isp1760_of_driver);
424 pci_unregister_driver(&isp1761_pci_driver);
428 module_exit(isp1760_exit);