2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
6 * - PDEV (generic platform device centralized driver model)
8 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
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)
33 struct device_node *dp = dev->dev.of_node;
35 struct resource memory;
38 resource_size_t res_len;
40 const unsigned int *prop;
41 unsigned int devflags = 0;
43 ret = of_address_to_resource(dp, 0, &memory);
47 res_len = resource_size(&memory);
49 res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
53 if (of_irq_map_one(dp, 0, &oirq)) {
58 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
61 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
62 devflags |= ISP1760_FLAG_ISP1761;
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;
69 if (of_get_property(dp, "port1-otg", NULL) != NULL)
70 devflags |= ISP1760_FLAG_OTG_EN;
72 if (of_get_property(dp, "analog-oc", NULL) != NULL)
73 devflags |= ISP1760_FLAG_ANALOG_OC;
75 if (of_get_property(dp, "dack-polarity", NULL) != NULL)
76 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
78 if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
79 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
81 hcd = isp1760_register(memory.start, res_len, virq,
82 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
89 dev_set_drvdata(&dev->dev, hcd);
93 release_mem_region(memory.start, res_len);
97 static int of_isp1760_remove(struct platform_device *dev)
99 struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
101 dev_set_drvdata(&dev->dev, NULL);
105 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
110 static const struct of_device_id of_isp1760_match[] = {
112 .compatible = "nxp,usb-isp1760",
115 .compatible = "nxp,usb-isp1761",
119 MODULE_DEVICE_TABLE(of, of_isp1760_match);
121 static struct platform_driver isp1760_of_driver = {
123 .name = "nxp-isp1760",
124 .owner = THIS_MODULE,
125 .of_match_table = of_isp1760_match,
127 .probe = of_isp1760_probe,
128 .remove = of_isp1760_remove,
133 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
134 const struct pci_device_id *id)
140 unsigned int devflags = 0;
143 resource_size_t pci_mem_phy0;
144 resource_size_t memlength;
146 u8 __iomem *chip_addr;
148 resource_size_t nxp_pci_io_base;
149 resource_size_t iolength;
154 if (pci_enable_device(dev) < 0)
160 /* Grab the PLX PCI mem maped port start address we need */
161 nxp_pci_io_base = pci_resource_start(dev, 0);
162 iolength = pci_resource_len(dev, 0);
164 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
165 printk(KERN_ERR "request region #1\n");
169 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
171 printk(KERN_ERR "ioremap #1\n");
172 ret_status = -ENOMEM;
175 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
176 pci_mem_phy0 = pci_resource_start(dev, 3);
177 memlength = pci_resource_len(dev, 3);
178 if (memlength < 0xffff) {
179 printk(KERN_ERR "memory length for this resource is wrong\n");
180 ret_status = -ENOMEM;
184 if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
185 printk(KERN_ERR "host controller already in use\n");
190 /* map available memory */
191 chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
193 printk(KERN_ERR "Error ioremap failed\n");
194 ret_status = -ENOMEM;
198 /* bad pci latencies can contribute to overruns */
199 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
201 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
202 if (limit && limit < latency)
203 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
206 /* Try to check whether we can access Scratch Register of
207 * Host Controller or not. The initial PCI access is retried until
208 * local init for the PCI bridge is completed
212 while ((reg_data != 0xFACE) && retry_count) {
213 /*by default host is in 16bit mode, so
214 * io operations at this stage must be 16 bit
216 writel(0xface, chip_addr + HC_SCRATCH_REG);
218 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
224 /* Host Controller presence is detected by writing to scratch register
225 * and reading back and checking the contents are same or not
227 if (reg_data != 0xFACE) {
228 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
229 ret_status = -ENOMEM;
235 /* configure PLX PCI chip to pass interrupts */
236 #define PLX_INT_CSR_REG 0x68
237 reg_data = readl(iobase + PLX_INT_CSR_REG);
239 writel(reg_data, iobase + PLX_INT_CSR_REG);
241 dev->dev.dma_mask = NULL;
242 hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
243 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
246 ret_status = -ENODEV;
250 /* done with PLX IO access */
252 release_mem_region(nxp_pci_io_base, iolength);
254 pci_set_drvdata(dev, hcd);
258 release_mem_region(pci_mem_phy0, memlength);
262 release_mem_region(nxp_pci_io_base, iolength);
266 static void isp1761_pci_remove(struct pci_dev *dev)
270 hcd = pci_get_drvdata(dev);
274 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
277 pci_disable_device(dev);
280 static void isp1761_pci_shutdown(struct pci_dev *dev)
282 printk(KERN_ERR "ips1761_pci_shutdown\n");
285 static const struct pci_device_id isp1760_plx [] = {
287 .class = PCI_CLASS_BRIDGE_OTHER << 8,
289 .vendor = PCI_VENDOR_ID_PLX,
291 .subvendor = PCI_VENDOR_ID_PLX,
296 MODULE_DEVICE_TABLE(pci, isp1760_plx);
298 static struct pci_driver isp1761_pci_driver = {
300 .id_table = isp1760_plx,
301 .probe = isp1761_pci_probe,
302 .remove = isp1761_pci_remove,
303 .shutdown = isp1761_pci_shutdown,
307 static int __devinit isp1760_plat_probe(struct platform_device *pdev)
311 struct resource *mem_res;
312 struct resource *irq_res;
313 resource_size_t mem_size;
314 struct isp1760_platform_data *priv = pdev->dev.platform_data;
315 unsigned int devflags = 0;
316 unsigned long irqflags = IRQF_SHARED | IRQF_DISABLED;
318 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
320 pr_warning("isp1760: Memory resource not available\n");
324 mem_size = resource_size(mem_res);
325 if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
326 pr_warning("isp1760: Cannot reserve the memory resource\n");
331 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
333 pr_warning("isp1760: IRQ resource not available\n");
336 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
339 if (priv->is_isp1761)
340 devflags |= ISP1760_FLAG_ISP1761;
341 if (priv->bus_width_16)
342 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
344 devflags |= ISP1760_FLAG_OTG_EN;
346 devflags |= ISP1760_FLAG_ANALOG_OC;
347 if (priv->dack_polarity_high)
348 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
349 if (priv->dreq_polarity_high)
350 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
353 hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
354 irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
356 pr_warning("isp1760: Failed to register the HCD device\n");
361 pr_info("ISP1760 USB device initialised\n");
365 release_mem_region(mem_res->start, mem_size);
370 static int __devexit isp1760_plat_remove(struct platform_device *pdev)
372 struct resource *mem_res;
373 resource_size_t mem_size;
375 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
376 mem_size = resource_size(mem_res);
377 release_mem_region(mem_res->start, mem_size);
382 static struct platform_driver isp1760_plat_driver = {
383 .probe = isp1760_plat_probe,
384 .remove = __devexit_p(isp1760_plat_remove),
390 static int __init isp1760_init(void)
392 int ret, any_ret = -ENODEV;
396 ret = platform_driver_register(&isp1760_plat_driver);
400 ret = platform_driver_register(&isp1760_of_driver);
405 ret = pci_register_driver(&isp1761_pci_driver);
414 module_init(isp1760_init);
416 static void __exit isp1760_exit(void)
418 platform_driver_unregister(&isp1760_plat_driver);
420 platform_driver_unregister(&isp1760_of_driver);
423 pci_unregister_driver(&isp1761_pci_driver);
427 module_exit(isp1760_exit);