2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
7 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
11 #include <linux/usb.h>
14 #include "../core/hcd.h"
15 #include "isp1760-hcd.h"
19 #include <linux/of_platform.h>
23 #include <linux/pci.h>
27 static int of_isp1760_probe(struct of_device *dev,
28 const struct of_device_id *match)
31 struct device_node *dp = dev->node;
33 struct resource memory;
38 const unsigned int *prop;
39 unsigned int devflags = 0;
41 ret = of_address_to_resource(dp, 0, &memory);
45 res = request_mem_region(memory.start, memory.end - memory.start + 1,
50 res_len = memory.end - memory.start + 1;
52 if (of_irq_map_one(dp, 0, &oirq)) {
57 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
60 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
61 devflags |= ISP1760_FLAG_ISP1761;
63 if (of_get_property(dp, "port1-disable", NULL) != NULL)
64 devflags |= ISP1760_FLAG_PORT1_DIS;
66 /* Some systems wire up only 16 of the 32 data lines */
67 prop = of_get_property(dp, "bus-width", NULL);
68 if (prop && *prop == 16)
69 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
71 if (of_get_property(dp, "port1-otg", NULL) != NULL)
72 devflags |= ISP1760_FLAG_OTG_EN;
74 if (of_get_property(dp, "analog-oc", NULL) != NULL)
75 devflags |= ISP1760_FLAG_ANALOG_OC;
77 if (of_get_property(dp, "dack-polarity", NULL) != NULL)
78 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
80 if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
81 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
83 hcd = isp1760_register(memory.start, res_len, virq,
84 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
91 dev_set_drvdata(&dev->dev, hcd);
95 release_mem_region(memory.start, memory.end - memory.start + 1);
99 static int of_isp1760_remove(struct of_device *dev)
101 struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
103 dev_set_drvdata(&dev->dev, NULL);
107 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
112 static struct of_device_id of_isp1760_match[] = {
114 .compatible = "nxp,usb-isp1760",
117 .compatible = "nxp,usb-isp1761",
121 MODULE_DEVICE_TABLE(of, of_isp1760_match);
123 static struct of_platform_driver isp1760_of_driver = {
124 .name = "nxp-isp1760",
125 .match_table = of_isp1760_match,
126 .probe = of_isp1760_probe,
127 .remove = of_isp1760_remove,
132 static u32 nxp_pci_io_base;
134 static u32 pci_mem_phy0;
136 static u8 __iomem *chip_addr;
137 static u8 __iomem *iobase;
139 static int __devinit isp1761_pci_probe(struct pci_dev *dev,
140 const struct pci_device_id *id)
148 unsigned int devflags = 0;
153 if (pci_enable_device(dev) < 0)
159 /* Grab the PLX PCI mem maped port start address we need */
160 nxp_pci_io_base = pci_resource_start(dev, 0);
161 iolength = pci_resource_len(dev, 0);
163 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
164 printk(KERN_ERR "request region #1\n");
168 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
170 printk(KERN_ERR "ioremap #1\n");
171 release_mem_region(nxp_pci_io_base, iolength);
174 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
175 pci_mem_phy0 = pci_resource_start(dev, 3);
176 length = pci_resource_len(dev, 3);
178 if (length < 0xffff) {
179 printk(KERN_ERR "memory length for this resource is less than "
181 release_mem_region(nxp_pci_io_base, iolength);
186 if (!request_mem_region(pci_mem_phy0, length, "ISP-PCI")) {
187 printk(KERN_ERR "host controller already in use\n");
188 release_mem_region(nxp_pci_io_base, iolength);
193 /* bad pci latencies can contribute to overruns */
194 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
196 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
197 if (limit && limit < latency)
198 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
201 /* Try to check whether we can access Scratch Register of
202 * Host Controller or not. The initial PCI access is retried until
203 * local init for the PCI bridge is completed
207 while ((reg_data != 0xFACE) && retry_count) {
208 /*by default host is in 16bit mode, so
209 * io operations at this stage must be 16 bit
211 writel(0xface, chip_addr + HC_SCRATCH_REG);
213 reg_data = readl(chip_addr + HC_SCRATCH_REG);
217 /* Host Controller presence is detected by writing to scratch register
218 * and reading back and checking the contents are same or not
220 if (reg_data != 0xFACE) {
221 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
227 status = readl(iobase + 0x68);
229 writel(status, iobase + 0x68);
231 dev->dev.dma_mask = NULL;
232 hcd = isp1760_register(pci_mem_phy0, length, dev->irq,
233 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
236 pci_set_drvdata(dev, hcd);
242 release_mem_region(pci_mem_phy0, length);
243 release_mem_region(nxp_pci_io_base, iolength);
246 static void isp1761_pci_remove(struct pci_dev *dev)
250 hcd = pci_get_drvdata(dev);
254 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
257 pci_disable_device(dev);
262 release_mem_region(nxp_pci_io_base, iolength);
263 release_mem_region(pci_mem_phy0, length);
266 static void isp1761_pci_shutdown(struct pci_dev *dev)
268 printk(KERN_ERR "ips1761_pci_shutdown\n");
271 static const struct pci_device_id isp1760_plx [] = { {
272 /* handle any USB 2.0 EHCI controller */
273 PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_OTHER << 8) | (0x06 << 16)), ~0),
276 { /* end: all zeroes */ }
278 MODULE_DEVICE_TABLE(pci, isp1760_plx);
280 static struct pci_driver isp1761_pci_driver = {
282 .id_table = isp1760_plx,
283 .probe = isp1761_pci_probe,
284 .remove = isp1761_pci_remove,
285 .shutdown = isp1761_pci_shutdown,
289 static int __init isp1760_init(void)
296 ret = of_register_platform_driver(&isp1760_of_driver);
303 ret = pci_register_driver(&isp1761_pci_driver);
313 of_unregister_platform_driver(&isp1760_of_driver);
318 module_init(isp1760_init);
320 static void __exit isp1760_exit(void)
323 of_unregister_platform_driver(&isp1760_of_driver);
326 pci_unregister_driver(&isp1761_pci_driver);
330 module_exit(isp1760_exit);