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>
16 #include <linux/platform_device.h>
17 #include <linux/slab.h>
18 #include <linux/usb/isp1760.h>
19 #include <linux/usb/hcd.h>
21 #include "isp1760-hcd.h"
24 #include <linux/pci.h>
28 static int isp1761_pci_probe(struct pci_dev *dev,
29 const struct pci_device_id *id)
34 unsigned int devflags = 0;
37 resource_size_t pci_mem_phy0;
38 resource_size_t memlength;
40 u8 __iomem *chip_addr;
42 resource_size_t nxp_pci_io_base;
43 resource_size_t iolength;
48 if (pci_enable_device(dev) < 0)
54 /* Grab the PLX PCI mem maped port start address we need */
55 nxp_pci_io_base = pci_resource_start(dev, 0);
56 iolength = pci_resource_len(dev, 0);
58 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
59 printk(KERN_ERR "request region #1\n");
63 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
65 printk(KERN_ERR "ioremap #1\n");
69 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
70 pci_mem_phy0 = pci_resource_start(dev, 3);
71 memlength = pci_resource_len(dev, 3);
72 if (memlength < 0xffff) {
73 printk(KERN_ERR "memory length for this resource is wrong\n");
78 if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
79 printk(KERN_ERR "host controller already in use\n");
84 /* map available memory */
85 chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
87 printk(KERN_ERR "Error ioremap failed\n");
92 /* bad pci latencies can contribute to overruns */
93 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
95 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
96 if (limit && limit < latency)
97 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
100 /* Try to check whether we can access Scratch Register of
101 * Host Controller or not. The initial PCI access is retried until
102 * local init for the PCI bridge is completed
106 while ((reg_data != 0xFACE) && retry_count) {
107 /*by default host is in 16bit mode, so
108 * io operations at this stage must be 16 bit
110 writel(0xface, chip_addr + HC_SCRATCH_REG);
112 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
118 /* Host Controller presence is detected by writing to scratch register
119 * and reading back and checking the contents are same or not
121 if (reg_data != 0xFACE) {
122 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
123 ret_status = -ENOMEM;
129 /* configure PLX PCI chip to pass interrupts */
130 #define PLX_INT_CSR_REG 0x68
131 reg_data = readl(iobase + PLX_INT_CSR_REG);
133 writel(reg_data, iobase + PLX_INT_CSR_REG);
135 dev->dev.dma_mask = NULL;
136 ret_status = isp1760_register(pci_mem_phy0, memlength, dev->irq,
137 IRQF_SHARED, &dev->dev,
138 dev_name(&dev->dev), devflags);
142 /* done with PLX IO access */
144 release_mem_region(nxp_pci_io_base, iolength);
149 release_mem_region(pci_mem_phy0, memlength);
153 release_mem_region(nxp_pci_io_base, iolength);
157 static void isp1761_pci_remove(struct pci_dev *dev)
159 isp1760_unregister(&dev->dev);
161 pci_disable_device(dev);
164 static void isp1761_pci_shutdown(struct pci_dev *dev)
166 printk(KERN_ERR "ips1761_pci_shutdown\n");
169 static const struct pci_device_id isp1760_plx [] = {
171 .class = PCI_CLASS_BRIDGE_OTHER << 8,
173 .vendor = PCI_VENDOR_ID_PLX,
175 .subvendor = PCI_VENDOR_ID_PLX,
180 MODULE_DEVICE_TABLE(pci, isp1760_plx);
182 static struct pci_driver isp1761_pci_driver = {
184 .id_table = isp1760_plx,
185 .probe = isp1761_pci_probe,
186 .remove = isp1761_pci_remove,
187 .shutdown = isp1761_pci_shutdown,
191 static int isp1760_plat_probe(struct platform_device *pdev)
193 unsigned long irqflags = IRQF_SHARED;
194 unsigned int devflags = 0;
195 struct resource *mem_res;
196 struct resource *irq_res;
197 resource_size_t mem_size;
200 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
202 pr_warning("isp1760: Memory resource not available\n");
205 mem_size = resource_size(mem_res);
206 if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
207 pr_warning("isp1760: Cannot reserve the memory resource\n");
211 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
213 pr_warning("isp1760: IRQ resource not available\n");
218 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
220 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
221 struct device_node *dp = pdev->dev.of_node;
224 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
225 devflags |= ISP1760_FLAG_ISP1761;
227 /* Some systems wire up only 16 of the 32 data lines */
228 of_property_read_u32(dp, "bus-width", &bus_width);
230 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
232 if (of_property_read_bool(dp, "port1-otg"))
233 devflags |= ISP1760_FLAG_OTG_EN;
235 if (of_property_read_bool(dp, "analog-oc"))
236 devflags |= ISP1760_FLAG_ANALOG_OC;
238 if (of_property_read_bool(dp, "dack-polarity"))
239 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
241 if (of_property_read_bool(dp, "dreq-polarity"))
242 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
243 } else if (dev_get_platdata(&pdev->dev)) {
244 struct isp1760_platform_data *pdata =
245 dev_get_platdata(&pdev->dev);
247 if (pdata->is_isp1761)
248 devflags |= ISP1760_FLAG_ISP1761;
249 if (pdata->bus_width_16)
250 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
251 if (pdata->port1_otg)
252 devflags |= ISP1760_FLAG_OTG_EN;
253 if (pdata->analog_oc)
254 devflags |= ISP1760_FLAG_ANALOG_OC;
255 if (pdata->dack_polarity_high)
256 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
257 if (pdata->dreq_polarity_high)
258 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
261 ret = isp1760_register(mem_res->start, mem_size, irq_res->start,
262 irqflags, &pdev->dev, dev_name(&pdev->dev),
267 pr_info("ISP1760 USB device initialised\n");
271 release_mem_region(mem_res->start, mem_size);
275 static int isp1760_plat_remove(struct platform_device *pdev)
277 isp1760_unregister(&pdev->dev);
283 static const struct of_device_id isp1760_of_match[] = {
284 { .compatible = "nxp,usb-isp1760", },
285 { .compatible = "nxp,usb-isp1761", },
288 MODULE_DEVICE_TABLE(of, isp1760_of_match);
291 static struct platform_driver isp1760_plat_driver = {
292 .probe = isp1760_plat_probe,
293 .remove = isp1760_plat_remove,
296 .of_match_table = of_match_ptr(isp1760_of_match),
300 static int __init isp1760_init(void)
302 int ret, any_ret = -ENODEV;
306 ret = platform_driver_register(&isp1760_plat_driver);
310 ret = pci_register_driver(&isp1761_pci_driver);
319 module_init(isp1760_init);
321 static void __exit isp1760_exit(void)
323 platform_driver_unregister(&isp1760_plat_driver);
325 pci_unregister_driver(&isp1761_pci_driver);
329 module_exit(isp1760_exit);