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/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/usb/isp1760.h>
17 #include <linux/usb/hcd.h>
19 #include "isp1760-hcd.h"
21 #if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
22 #include <linux/slab.h>
24 #include <linux/of_platform.h>
25 #include <linux/of_address.h>
26 #include <linux/of_irq.h>
27 #include <linux/of_gpio.h>
31 #include <linux/pci.h>
34 #if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
40 static int of_isp1760_probe(struct platform_device *dev)
42 struct isp1760 *drvdata;
43 struct device_node *dp = dev->dev.of_node;
45 struct resource memory;
48 resource_size_t res_len;
50 const unsigned int *prop;
51 unsigned int devflags = 0;
52 enum of_gpio_flags gpio_flags;
54 drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
58 ret = of_address_to_resource(dp, 0, &memory);
62 res_len = resource_size(&memory);
64 res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
68 if (of_irq_map_one(dp, 0, &oirq)) {
73 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
76 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
77 devflags |= ISP1760_FLAG_ISP1761;
79 /* Some systems wire up only 16 of the 32 data lines */
80 prop = of_get_property(dp, "bus-width", NULL);
81 if (prop && *prop == 16)
82 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
84 if (of_get_property(dp, "port1-otg", NULL) != NULL)
85 devflags |= ISP1760_FLAG_OTG_EN;
87 if (of_get_property(dp, "analog-oc", NULL) != NULL)
88 devflags |= ISP1760_FLAG_ANALOG_OC;
90 if (of_get_property(dp, "dack-polarity", NULL) != NULL)
91 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
93 if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
94 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
96 drvdata->rst_gpio = of_get_gpio_flags(dp, 0, &gpio_flags);
97 if (gpio_is_valid(drvdata->rst_gpio)) {
98 ret = gpio_request(drvdata->rst_gpio, dev_name(&dev->dev));
100 if (!(gpio_flags & OF_GPIO_ACTIVE_LOW)) {
101 devflags |= ISP1760_FLAG_RESET_ACTIVE_HIGH;
102 gpio_direction_output(drvdata->rst_gpio, 0);
104 gpio_direction_output(drvdata->rst_gpio, 1);
107 drvdata->rst_gpio = ret;
111 drvdata->hcd = isp1760_register(memory.start, res_len, virq,
112 IRQF_SHARED, drvdata->rst_gpio,
113 &dev->dev, dev_name(&dev->dev),
115 if (IS_ERR(drvdata->hcd)) {
116 ret = PTR_ERR(drvdata->hcd);
120 dev_set_drvdata(&dev->dev, drvdata);
124 if (gpio_is_valid(drvdata->rst_gpio))
125 gpio_free(drvdata->rst_gpio);
127 release_mem_region(memory.start, res_len);
132 static int of_isp1760_remove(struct platform_device *dev)
134 struct isp1760 *drvdata = dev_get_drvdata(&dev->dev);
136 dev_set_drvdata(&dev->dev, NULL);
138 usb_remove_hcd(drvdata->hcd);
139 iounmap(drvdata->hcd->regs);
140 release_mem_region(drvdata->hcd->rsrc_start, drvdata->hcd->rsrc_len);
141 usb_put_hcd(drvdata->hcd);
143 if (gpio_is_valid(drvdata->rst_gpio))
144 gpio_free(drvdata->rst_gpio);
150 static const struct of_device_id of_isp1760_match[] = {
152 .compatible = "nxp,usb-isp1760",
155 .compatible = "nxp,usb-isp1761",
159 MODULE_DEVICE_TABLE(of, of_isp1760_match);
161 static struct platform_driver isp1760_of_driver = {
163 .name = "nxp-isp1760",
164 .owner = THIS_MODULE,
165 .of_match_table = of_isp1760_match,
167 .probe = of_isp1760_probe,
168 .remove = of_isp1760_remove,
173 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
174 const struct pci_device_id *id)
180 unsigned int devflags = 0;
183 resource_size_t pci_mem_phy0;
184 resource_size_t memlength;
186 u8 __iomem *chip_addr;
188 resource_size_t nxp_pci_io_base;
189 resource_size_t iolength;
194 if (pci_enable_device(dev) < 0)
200 /* Grab the PLX PCI mem maped port start address we need */
201 nxp_pci_io_base = pci_resource_start(dev, 0);
202 iolength = pci_resource_len(dev, 0);
204 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
205 printk(KERN_ERR "request region #1\n");
209 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
211 printk(KERN_ERR "ioremap #1\n");
212 ret_status = -ENOMEM;
215 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
216 pci_mem_phy0 = pci_resource_start(dev, 3);
217 memlength = pci_resource_len(dev, 3);
218 if (memlength < 0xffff) {
219 printk(KERN_ERR "memory length for this resource is wrong\n");
220 ret_status = -ENOMEM;
224 if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
225 printk(KERN_ERR "host controller already in use\n");
230 /* map available memory */
231 chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
233 printk(KERN_ERR "Error ioremap failed\n");
234 ret_status = -ENOMEM;
238 /* bad pci latencies can contribute to overruns */
239 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
241 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
242 if (limit && limit < latency)
243 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
246 /* Try to check whether we can access Scratch Register of
247 * Host Controller or not. The initial PCI access is retried until
248 * local init for the PCI bridge is completed
252 while ((reg_data != 0xFACE) && retry_count) {
253 /*by default host is in 16bit mode, so
254 * io operations at this stage must be 16 bit
256 writel(0xface, chip_addr + HC_SCRATCH_REG);
258 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
264 /* Host Controller presence is detected by writing to scratch register
265 * and reading back and checking the contents are same or not
267 if (reg_data != 0xFACE) {
268 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
269 ret_status = -ENOMEM;
275 /* configure PLX PCI chip to pass interrupts */
276 #define PLX_INT_CSR_REG 0x68
277 reg_data = readl(iobase + PLX_INT_CSR_REG);
279 writel(reg_data, iobase + PLX_INT_CSR_REG);
281 dev->dev.dma_mask = NULL;
282 hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
283 IRQF_SHARED, -ENOENT, &dev->dev, dev_name(&dev->dev),
286 ret_status = -ENODEV;
290 /* done with PLX IO access */
292 release_mem_region(nxp_pci_io_base, iolength);
294 pci_set_drvdata(dev, hcd);
298 release_mem_region(pci_mem_phy0, memlength);
302 release_mem_region(nxp_pci_io_base, iolength);
306 static void isp1761_pci_remove(struct pci_dev *dev)
310 hcd = pci_get_drvdata(dev);
314 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
317 pci_disable_device(dev);
320 static void isp1761_pci_shutdown(struct pci_dev *dev)
322 printk(KERN_ERR "ips1761_pci_shutdown\n");
325 static const struct pci_device_id isp1760_plx [] = {
327 .class = PCI_CLASS_BRIDGE_OTHER << 8,
329 .vendor = PCI_VENDOR_ID_PLX,
331 .subvendor = PCI_VENDOR_ID_PLX,
336 MODULE_DEVICE_TABLE(pci, isp1760_plx);
338 static struct pci_driver isp1761_pci_driver = {
340 .id_table = isp1760_plx,
341 .probe = isp1761_pci_probe,
342 .remove = isp1761_pci_remove,
343 .shutdown = isp1761_pci_shutdown,
347 static int __devinit isp1760_plat_probe(struct platform_device *pdev)
351 struct resource *mem_res;
352 struct resource *irq_res;
353 resource_size_t mem_size;
354 struct isp1760_platform_data *priv = pdev->dev.platform_data;
355 unsigned int devflags = 0;
356 unsigned long irqflags = IRQF_SHARED;
358 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
360 pr_warning("isp1760: Memory resource not available\n");
364 mem_size = resource_size(mem_res);
365 if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
366 pr_warning("isp1760: Cannot reserve the memory resource\n");
371 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
373 pr_warning("isp1760: IRQ resource not available\n");
376 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
379 if (priv->is_isp1761)
380 devflags |= ISP1760_FLAG_ISP1761;
381 if (priv->bus_width_16)
382 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
384 devflags |= ISP1760_FLAG_OTG_EN;
386 devflags |= ISP1760_FLAG_ANALOG_OC;
387 if (priv->dack_polarity_high)
388 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
389 if (priv->dreq_polarity_high)
390 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
393 hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
395 &pdev->dev, dev_name(&pdev->dev), devflags);
397 pr_warning("isp1760: Failed to register the HCD device\n");
402 pr_info("ISP1760 USB device initialised\n");
406 release_mem_region(mem_res->start, mem_size);
411 static int __devexit isp1760_plat_remove(struct platform_device *pdev)
413 struct resource *mem_res;
414 resource_size_t mem_size;
416 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
417 mem_size = resource_size(mem_res);
418 release_mem_region(mem_res->start, mem_size);
423 static struct platform_driver isp1760_plat_driver = {
424 .probe = isp1760_plat_probe,
425 .remove = __devexit_p(isp1760_plat_remove),
431 static int __init isp1760_init(void)
433 int ret, any_ret = -ENODEV;
437 ret = platform_driver_register(&isp1760_plat_driver);
440 #if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
441 ret = platform_driver_register(&isp1760_of_driver);
446 ret = pci_register_driver(&isp1761_pci_driver);
455 module_init(isp1760_init);
457 static void __exit isp1760_exit(void)
459 platform_driver_unregister(&isp1760_plat_driver);
460 #if defined(CONFIG_OF) && defined(CONFIG_OF_IRQ)
461 platform_driver_unregister(&isp1760_of_driver);
464 pci_unregister_driver(&isp1761_pci_driver);
468 module_exit(isp1760_exit);