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, devflags);
141 /* done with PLX IO access */
143 release_mem_region(nxp_pci_io_base, iolength);
148 release_mem_region(pci_mem_phy0, memlength);
152 release_mem_region(nxp_pci_io_base, iolength);
156 static void isp1761_pci_remove(struct pci_dev *dev)
158 isp1760_unregister(&dev->dev);
160 pci_disable_device(dev);
163 static void isp1761_pci_shutdown(struct pci_dev *dev)
165 printk(KERN_ERR "ips1761_pci_shutdown\n");
168 static const struct pci_device_id isp1760_plx [] = {
170 .class = PCI_CLASS_BRIDGE_OTHER << 8,
172 .vendor = PCI_VENDOR_ID_PLX,
174 .subvendor = PCI_VENDOR_ID_PLX,
179 MODULE_DEVICE_TABLE(pci, isp1760_plx);
181 static struct pci_driver isp1761_pci_driver = {
183 .id_table = isp1760_plx,
184 .probe = isp1761_pci_probe,
185 .remove = isp1761_pci_remove,
186 .shutdown = isp1761_pci_shutdown,
190 static int isp1760_plat_probe(struct platform_device *pdev)
192 unsigned long irqflags = IRQF_SHARED;
193 unsigned int devflags = 0;
194 struct resource *mem_res;
195 struct resource *irq_res;
196 resource_size_t mem_size;
199 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
201 pr_warning("isp1760: Memory resource not available\n");
204 mem_size = resource_size(mem_res);
205 if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
206 pr_warning("isp1760: Cannot reserve the memory resource\n");
210 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
212 pr_warning("isp1760: IRQ resource not available\n");
217 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
219 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
220 struct device_node *dp = pdev->dev.of_node;
223 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
224 devflags |= ISP1760_FLAG_ISP1761;
226 /* Some systems wire up only 16 of the 32 data lines */
227 of_property_read_u32(dp, "bus-width", &bus_width);
229 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
231 if (of_property_read_bool(dp, "port1-otg"))
232 devflags |= ISP1760_FLAG_OTG_EN;
234 if (of_property_read_bool(dp, "analog-oc"))
235 devflags |= ISP1760_FLAG_ANALOG_OC;
237 if (of_property_read_bool(dp, "dack-polarity"))
238 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
240 if (of_property_read_bool(dp, "dreq-polarity"))
241 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
242 } else if (dev_get_platdata(&pdev->dev)) {
243 struct isp1760_platform_data *pdata =
244 dev_get_platdata(&pdev->dev);
246 if (pdata->is_isp1761)
247 devflags |= ISP1760_FLAG_ISP1761;
248 if (pdata->bus_width_16)
249 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
250 if (pdata->port1_otg)
251 devflags |= ISP1760_FLAG_OTG_EN;
252 if (pdata->analog_oc)
253 devflags |= ISP1760_FLAG_ANALOG_OC;
254 if (pdata->dack_polarity_high)
255 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
256 if (pdata->dreq_polarity_high)
257 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
260 ret = isp1760_register(mem_res->start, mem_size, irq_res->start,
261 irqflags, &pdev->dev, devflags);
265 pr_info("ISP1760 USB device initialised\n");
269 release_mem_region(mem_res->start, mem_size);
273 static int isp1760_plat_remove(struct platform_device *pdev)
275 isp1760_unregister(&pdev->dev);
281 static const struct of_device_id isp1760_of_match[] = {
282 { .compatible = "nxp,usb-isp1760", },
283 { .compatible = "nxp,usb-isp1761", },
286 MODULE_DEVICE_TABLE(of, isp1760_of_match);
289 static struct platform_driver isp1760_plat_driver = {
290 .probe = isp1760_plat_probe,
291 .remove = isp1760_plat_remove,
294 .of_match_table = of_match_ptr(isp1760_of_match),
298 static int __init isp1760_init(void)
300 int ret, any_ret = -ENODEV;
302 isp1760_init_kmem_once();
304 ret = platform_driver_register(&isp1760_plat_driver);
308 ret = pci_register_driver(&isp1761_pci_driver);
314 isp1760_deinit_kmem_cache();
317 module_init(isp1760_init);
319 static void __exit isp1760_exit(void)
321 platform_driver_unregister(&isp1760_plat_driver);
323 pci_unregister_driver(&isp1761_pci_driver);
325 isp1760_deinit_kmem_cache();
327 module_exit(isp1760_exit);