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path: root/drivers/usb/host/isp1760-if.c
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-rw-r--r--drivers/usb/host/isp1760-if.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c
new file mode 100644
index 000000000000..73fb2a38f1e4
--- /dev/null
+++ b/drivers/usb/host/isp1760-if.c
@@ -0,0 +1,298 @@
1/*
2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
4 * - OpenFirmware
5 * - PCI
6 *
7 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
8 *
9 */
10
11#include <linux/usb.h>
12#include <linux/io.h>
13
14#include "../core/hcd.h"
15#include "isp1760-hcd.h"
16
17#ifdef CONFIG_USB_ISP1760_OF
18#include <linux/of.h>
19#include <linux/of_platform.h>
20#endif
21
22#ifdef CONFIG_USB_ISP1760_PCI
23#include <linux/pci.h>
24#endif
25
26#ifdef CONFIG_USB_ISP1760_OF
27static int of_isp1760_probe(struct of_device *dev,
28 const struct of_device_id *match)
29{
30 struct usb_hcd *hcd;
31 struct device_node *dp = dev->node;
32 struct resource *res;
33 struct resource memory;
34 struct of_irq oirq;
35 int virq;
36 u64 res_len;
37 int ret;
38
39 ret = of_address_to_resource(dp, 0, &memory);
40 if (ret)
41 return -ENXIO;
42
43 res = request_mem_region(memory.start, memory.end - memory.start + 1,
44 dev->dev.bus_id);
45 if (!res)
46 return -EBUSY;
47
48 res_len = memory.end - memory.start + 1;
49
50 if (of_irq_map_one(dp, 0, &oirq)) {
51 ret = -ENODEV;
52 goto release_reg;
53 }
54
55 virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
56 oirq.size);
57
58 hcd = isp1760_register(memory.start, res_len, virq,
59 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev->dev.bus_id);
60 if (IS_ERR(hcd)) {
61 ret = PTR_ERR(hcd);
62 goto release_reg;
63 }
64
65 dev_set_drvdata(&dev->dev, hcd);
66 return ret;
67
68release_reg:
69 release_mem_region(memory.start, memory.end - memory.start + 1);
70 return ret;
71}
72
73static int of_isp1760_remove(struct of_device *dev)
74{
75 struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
76
77 dev_set_drvdata(&dev->dev, NULL);
78
79 usb_remove_hcd(hcd);
80 iounmap(hcd->regs);
81 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
82 usb_put_hcd(hcd);
83 return 0;
84}
85
86static struct of_device_id of_isp1760_match[] = {
87 {
88 .compatible = "nxp,usb-isp1760",
89 },
90 { },
91};
92MODULE_DEVICE_TABLE(of, of_isp1760_match);
93
94static struct of_platform_driver isp1760_of_driver = {
95 .name = "nxp-isp1760",
96 .match_table = of_isp1760_match,
97 .probe = of_isp1760_probe,
98 .remove = of_isp1760_remove,
99};
100#endif
101
102#ifdef CONFIG_USB_ISP1760_PCI
103static u32 nxp_pci_io_base;
104static u32 iolength;
105static u32 pci_mem_phy0;
106static u32 length;
107static u8 *chip_addr;
108static u8 *iobase;
109
110static int __devinit isp1761_pci_probe(struct pci_dev *dev,
111 const struct pci_device_id *id)
112{
113 u8 latency, limit;
114 __u32 reg_data;
115 int retry_count;
116 int length;
117 int status = 1;
118 struct usb_hcd *hcd;
119
120 if (usb_disabled())
121 return -ENODEV;
122
123 if (pci_enable_device(dev) < 0)
124 return -ENODEV;
125
126 if (!dev->irq)
127 return -ENODEV;
128
129 /* Grab the PLX PCI mem maped port start address we need */
130 nxp_pci_io_base = pci_resource_start(dev, 0);
131 iolength = pci_resource_len(dev, 0);
132
133 if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
134 printk(KERN_ERR "request region #1\n");
135 return -EBUSY;
136 }
137
138 iobase = ioremap_nocache(nxp_pci_io_base, iolength);
139 if (!iobase) {
140 printk(KERN_ERR "ioremap #1\n");
141 release_mem_region(nxp_pci_io_base, iolength);
142 return -ENOMEM;
143 }
144 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
145 pci_mem_phy0 = pci_resource_start(dev, 3);
146 length = pci_resource_len(dev, 3);
147
148 if (length < 0xffff) {
149 printk(KERN_ERR "memory length for this resource is less than "
150 "required\n");
151 release_mem_region(nxp_pci_io_base, iolength);
152 iounmap(iobase);
153 return -ENOMEM;
154 }
155
156 if (!request_mem_region(pci_mem_phy0, length, "ISP-PCI")) {
157 printk(KERN_ERR "host controller already in use\n");
158 release_mem_region(nxp_pci_io_base, iolength);
159 iounmap(iobase);
160 return -EBUSY;
161 }
162
163 /* bad pci latencies can contribute to overruns */
164 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
165 if (latency) {
166 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
167 if (limit && limit < latency)
168 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
169 }
170
171 /* Try to check whether we can access Scratch Register of
172 * Host Controller or not. The initial PCI access is retried until
173 * local init for the PCI bridge is completed
174 */
175 retry_count = 20;
176 reg_data = 0;
177 while ((reg_data != 0xFACE) && retry_count) {
178 /*by default host is in 16bit mode, so
179 * io operations at this stage must be 16 bit
180 * */
181 writel(0xface, chip_addr + HC_SCRATCH_REG);
182 udelay(100);
183 reg_data = readl(chip_addr + HC_SCRATCH_REG);
184 retry_count--;
185 }
186
187 /* Host Controller presence is detected by writing to scratch register
188 * and reading back and checking the contents are same or not
189 */
190 if (reg_data != 0xFACE) {
191 err("scratch register mismatch %x", reg_data);
192 goto clean;
193 }
194
195 pci_set_master(dev);
196
197 status = readl(iobase + 0x68);
198 status |= 0x900;
199 writel(status, iobase + 0x68);
200
201 dev->dev.dma_mask = NULL;
202 hcd = isp1760_register(pci_mem_phy0, length, dev->irq,
203 IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev->dev.bus_id);
204 pci_set_drvdata(dev, hcd);
205 if (!hcd)
206 return 0;
207clean:
208 status = -ENODEV;
209 iounmap(iobase);
210 release_mem_region(pci_mem_phy0, length);
211 release_mem_region(nxp_pci_io_base, iolength);
212 return status;
213}
214static void isp1761_pci_remove(struct pci_dev *dev)
215{
216 struct usb_hcd *hcd;
217
218 hcd = pci_get_drvdata(dev);
219
220 usb_remove_hcd(hcd);
221 iounmap(hcd->regs);
222 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
223 usb_put_hcd(hcd);
224
225 pci_disable_device(dev);
226
227 iounmap(iobase);
228 iounmap(chip_addr);
229
230 release_mem_region(nxp_pci_io_base, iolength);
231 release_mem_region(pci_mem_phy0, length);
232}
233
234static void isp1761_pci_shutdown(struct pci_dev *dev)
235{
236 printk(KERN_ERR "ips1761_pci_shutdown\n");
237}
238
239static const struct pci_device_id isp1760_plx [] = { {
240 /* handle any USB 2.0 EHCI controller */
241 PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_OTHER << 8) | (0x06 << 16)), ~0),
242 .driver_data = 0,
243},
244{ /* end: all zeroes */ }
245};
246MODULE_DEVICE_TABLE(pci, isp1760_plx);
247
248static struct pci_driver isp1761_pci_driver = {
249 .name = "isp1760",
250 .id_table = isp1760_plx,
251 .probe = isp1761_pci_probe,
252 .remove = isp1761_pci_remove,
253 .shutdown = isp1761_pci_shutdown,
254};
255#endif
256
257static int __init isp1760_init(void)
258{
259 int ret;
260
261 init_kmem_once();
262
263#ifdef CONFIG_USB_ISP1760_OF
264 ret = of_register_platform_driver(&isp1760_of_driver);
265 if (ret) {
266 deinit_kmem_cache();
267 return ret;
268 }
269#endif
270#ifdef CONFIG_USB_ISP1760_PCI
271 ret = pci_register_driver(&isp1761_pci_driver);
272 if (ret)
273 goto unreg_of;
274#endif
275 return ret;
276
277#ifdef CONFIG_USB_ISP1760_PCI
278unreg_of:
279#endif
280#ifdef CONFIG_USB_ISP1760_OF
281 of_unregister_platform_driver(&isp1760_of_driver);
282#endif
283 deinit_kmem_cache();
284 return ret;
285}
286module_init(isp1760_init);
287
288static void __exit isp1760_exit(void)
289{
290#ifdef CONFIG_USB_ISP1760_OF
291 of_unregister_platform_driver(&isp1760_of_driver);
292#endif
293#ifdef CONFIG_USB_ISP1760_PCI
294 pci_unregister_driver(&isp1761_pci_driver);
295#endif
296 deinit_kmem_cache();
297}
298module_exit(isp1760_exit);