Loading...
Note: File does not exist in v6.2.
1/*
2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
4 * - OpenFirmware
5 * - PCI
6 * - PDEV (generic platform device centralized driver model)
7 *
8 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
9 *
10 */
11
12#include <linux/usb.h>
13#include <linux/io.h>
14#include <linux/platform_device.h>
15#include <linux/usb/isp1760.h>
16#include <linux/usb/hcd.h>
17
18#include "isp1760-hcd.h"
19
20#ifdef CONFIG_PPC_OF
21#include <linux/of.h>
22#include <linux/of_platform.h>
23#endif
24
25#ifdef CONFIG_PCI
26#include <linux/pci.h>
27#endif
28
29#ifdef CONFIG_PPC_OF
30static int of_isp1760_probe(struct platform_device *dev)
31{
32 struct usb_hcd *hcd;
33 struct device_node *dp = dev->dev.of_node;
34 struct resource *res;
35 struct resource memory;
36 struct of_irq oirq;
37 int virq;
38 resource_size_t res_len;
39 int ret;
40 const unsigned int *prop;
41 unsigned int devflags = 0;
42
43 ret = of_address_to_resource(dp, 0, &memory);
44 if (ret)
45 return -ENXIO;
46
47 res_len = resource_size(&memory);
48
49 res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
50 if (!res)
51 return -EBUSY;
52
53 if (of_irq_map_one(dp, 0, &oirq)) {
54 ret = -ENODEV;
55 goto release_reg;
56 }
57
58 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
59 oirq.size);
60
61 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
62 devflags |= ISP1760_FLAG_ISP1761;
63
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;
68
69 if (of_get_property(dp, "port1-otg", NULL) != NULL)
70 devflags |= ISP1760_FLAG_OTG_EN;
71
72 if (of_get_property(dp, "analog-oc", NULL) != NULL)
73 devflags |= ISP1760_FLAG_ANALOG_OC;
74
75 if (of_get_property(dp, "dack-polarity", NULL) != NULL)
76 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
77
78 if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
79 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
80
81 hcd = isp1760_register(memory.start, res_len, virq,
82 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
83 devflags);
84 if (IS_ERR(hcd)) {
85 ret = PTR_ERR(hcd);
86 goto release_reg;
87 }
88
89 dev_set_drvdata(&dev->dev, hcd);
90 return ret;
91
92release_reg:
93 release_mem_region(memory.start, res_len);
94 return ret;
95}
96
97static int of_isp1760_remove(struct platform_device *dev)
98{
99 struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
100
101 dev_set_drvdata(&dev->dev, NULL);
102
103 usb_remove_hcd(hcd);
104 iounmap(hcd->regs);
105 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
106 usb_put_hcd(hcd);
107 return 0;
108}
109
110static const struct of_device_id of_isp1760_match[] = {
111 {
112 .compatible = "nxp,usb-isp1760",
113 },
114 {
115 .compatible = "nxp,usb-isp1761",
116 },
117 { },
118};
119MODULE_DEVICE_TABLE(of, of_isp1760_match);
120
121static struct platform_driver isp1760_of_driver = {
122 .driver = {
123 .name = "nxp-isp1760",
124 .owner = THIS_MODULE,
125 .of_match_table = of_isp1760_match,
126 },
127 .probe = of_isp1760_probe,
128 .remove = of_isp1760_remove,
129};
130#endif
131
132#ifdef CONFIG_PCI
133static int __devinit isp1761_pci_probe(struct pci_dev *dev,
134 const struct pci_device_id *id)
135{
136 u8 latency, limit;
137 __u32 reg_data;
138 int retry_count;
139 struct usb_hcd *hcd;
140 unsigned int devflags = 0;
141 int ret_status = 0;
142
143 resource_size_t pci_mem_phy0;
144 resource_size_t memlength;
145
146 u8 __iomem *chip_addr;
147 u8 __iomem *iobase;
148 resource_size_t nxp_pci_io_base;
149 resource_size_t iolength;
150
151 if (usb_disabled())
152 return -ENODEV;
153
154 if (pci_enable_device(dev) < 0)
155 return -ENODEV;
156
157 if (!dev->irq)
158 return -ENODEV;
159
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);
163
164 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
165 printk(KERN_ERR "request region #1\n");
166 return -EBUSY;
167 }
168
169 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
170 if (!iobase) {
171 printk(KERN_ERR "ioremap #1\n");
172 ret_status = -ENOMEM;
173 goto cleanup1;
174 }
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;
181 goto cleanup2;
182 }
183
184 if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
185 printk(KERN_ERR "host controller already in use\n");
186 ret_status = -EBUSY;
187 goto cleanup2;
188 }
189
190 /* map available memory */
191 chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
192 if (!chip_addr) {
193 printk(KERN_ERR "Error ioremap failed\n");
194 ret_status = -ENOMEM;
195 goto cleanup3;
196 }
197
198 /* bad pci latencies can contribute to overruns */
199 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
200 if (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);
204 }
205
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
209 */
210 retry_count = 20;
211 reg_data = 0;
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
215 * */
216 writel(0xface, chip_addr + HC_SCRATCH_REG);
217 udelay(100);
218 reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff;
219 retry_count--;
220 }
221
222 iounmap(chip_addr);
223
224 /* Host Controller presence is detected by writing to scratch register
225 * and reading back and checking the contents are same or not
226 */
227 if (reg_data != 0xFACE) {
228 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
229 ret_status = -ENOMEM;
230 goto cleanup3;
231 }
232
233 pci_set_master(dev);
234
235 /* configure PLX PCI chip to pass interrupts */
236#define PLX_INT_CSR_REG 0x68
237 reg_data = readl(iobase + PLX_INT_CSR_REG);
238 reg_data |= 0x900;
239 writel(reg_data, iobase + PLX_INT_CSR_REG);
240
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),
244 devflags);
245 if (IS_ERR(hcd)) {
246 ret_status = -ENODEV;
247 goto cleanup3;
248 }
249
250 /* done with PLX IO access */
251 iounmap(iobase);
252 release_mem_region(nxp_pci_io_base, iolength);
253
254 pci_set_drvdata(dev, hcd);
255 return 0;
256
257cleanup3:
258 release_mem_region(pci_mem_phy0, memlength);
259cleanup2:
260 iounmap(iobase);
261cleanup1:
262 release_mem_region(nxp_pci_io_base, iolength);
263 return ret_status;
264}
265
266static void isp1761_pci_remove(struct pci_dev *dev)
267{
268 struct usb_hcd *hcd;
269
270 hcd = pci_get_drvdata(dev);
271
272 usb_remove_hcd(hcd);
273 iounmap(hcd->regs);
274 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
275 usb_put_hcd(hcd);
276
277 pci_disable_device(dev);
278}
279
280static void isp1761_pci_shutdown(struct pci_dev *dev)
281{
282 printk(KERN_ERR "ips1761_pci_shutdown\n");
283}
284
285static const struct pci_device_id isp1760_plx [] = {
286 {
287 .class = PCI_CLASS_BRIDGE_OTHER << 8,
288 .class_mask = ~0,
289 .vendor = PCI_VENDOR_ID_PLX,
290 .device = 0x5406,
291 .subvendor = PCI_VENDOR_ID_PLX,
292 .subdevice = 0x9054,
293 },
294 { }
295};
296MODULE_DEVICE_TABLE(pci, isp1760_plx);
297
298static struct pci_driver isp1761_pci_driver = {
299 .name = "isp1760",
300 .id_table = isp1760_plx,
301 .probe = isp1761_pci_probe,
302 .remove = isp1761_pci_remove,
303 .shutdown = isp1761_pci_shutdown,
304};
305#endif
306
307static int __devinit isp1760_plat_probe(struct platform_device *pdev)
308{
309 int ret = 0;
310 struct usb_hcd *hcd;
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;
317
318 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
319 if (!mem_res) {
320 pr_warning("isp1760: Memory resource not available\n");
321 ret = -ENODEV;
322 goto out;
323 }
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");
327 ret = -EBUSY;
328 goto out;
329 }
330
331 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
332 if (!irq_res) {
333 pr_warning("isp1760: IRQ resource not available\n");
334 return -ENODEV;
335 }
336 irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
337
338 if (priv) {
339 if (priv->is_isp1761)
340 devflags |= ISP1760_FLAG_ISP1761;
341 if (priv->bus_width_16)
342 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
343 if (priv->port1_otg)
344 devflags |= ISP1760_FLAG_OTG_EN;
345 if (priv->analog_oc)
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;
351 }
352
353 hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
354 irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
355 if (IS_ERR(hcd)) {
356 pr_warning("isp1760: Failed to register the HCD device\n");
357 ret = -ENODEV;
358 goto cleanup;
359 }
360
361 pr_info("ISP1760 USB device initialised\n");
362 return ret;
363
364cleanup:
365 release_mem_region(mem_res->start, mem_size);
366out:
367 return ret;
368}
369
370static int __devexit isp1760_plat_remove(struct platform_device *pdev)
371{
372 struct resource *mem_res;
373 resource_size_t mem_size;
374
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);
378
379 return 0;
380}
381
382static struct platform_driver isp1760_plat_driver = {
383 .probe = isp1760_plat_probe,
384 .remove = __devexit_p(isp1760_plat_remove),
385 .driver = {
386 .name = "isp1760",
387 },
388};
389
390static int __init isp1760_init(void)
391{
392 int ret, any_ret = -ENODEV;
393
394 init_kmem_once();
395
396 ret = platform_driver_register(&isp1760_plat_driver);
397 if (!ret)
398 any_ret = 0;
399#ifdef CONFIG_PPC_OF
400 ret = platform_driver_register(&isp1760_of_driver);
401 if (!ret)
402 any_ret = 0;
403#endif
404#ifdef CONFIG_PCI
405 ret = pci_register_driver(&isp1761_pci_driver);
406 if (!ret)
407 any_ret = 0;
408#endif
409
410 if (any_ret)
411 deinit_kmem_cache();
412 return any_ret;
413}
414module_init(isp1760_init);
415
416static void __exit isp1760_exit(void)
417{
418 platform_driver_unregister(&isp1760_plat_driver);
419#ifdef CONFIG_PPC_OF
420 platform_driver_unregister(&isp1760_of_driver);
421#endif
422#ifdef CONFIG_PCI
423 pci_unregister_driver(&isp1761_pci_driver);
424#endif
425 deinit_kmem_cache();
426}
427module_exit(isp1760_exit);