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Commit | Line | Data |
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db11e47d SS |
1 | /* |
2 | * Glue code for the ISP1760 driver and bus | |
3 | * Currently there is support for | |
4 | * - OpenFirmware | |
5 | * - PCI | |
9da69c60 | 6 | * - PDEV (generic platform device centralized driver model) |
db11e47d SS |
7 | * |
8 | * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/usb.h> | |
13 | #include <linux/io.h> | |
6eb0de82 | 14 | #include <linux/module.h> |
c3cc40cc | 15 | #include <linux/of.h> |
f7e7aa58 | 16 | #include <linux/platform_device.h> |
c3cc40cc | 17 | #include <linux/slab.h> |
9da69c60 | 18 | #include <linux/usb/isp1760.h> |
27729aad | 19 | #include <linux/usb/hcd.h> |
db11e47d | 20 | |
4b1a577d | 21 | #include "isp1760-core.h" |
e19c99e7 | 22 | #include "isp1760-regs.h" |
db11e47d | 23 | |
ff30bf1c | 24 | #ifdef CONFIG_PCI |
db11e47d SS |
25 | #include <linux/pci.h> |
26 | #endif | |
27 | ||
ff30bf1c | 28 | #ifdef CONFIG_PCI |
c770e001 | 29 | static int isp1761_pci_init(struct pci_dev *dev) |
db11e47d | 30 | { |
c770e001 LP |
31 | resource_size_t mem_start; |
32 | resource_size_t mem_length; | |
33 | u8 __iomem *iobase; | |
db11e47d | 34 | u8 latency, limit; |
db11e47d | 35 | int retry_count; |
c770e001 | 36 | u32 reg_data; |
db11e47d | 37 | |
db11e47d | 38 | /* Grab the PLX PCI shared memory of the ISP 1761 we need */ |
c770e001 LP |
39 | mem_start = pci_resource_start(dev, 3); |
40 | mem_length = pci_resource_len(dev, 3); | |
41 | if (mem_length < 0xffff) { | |
6013bbba | 42 | printk(KERN_ERR "memory length for this resource is wrong\n"); |
c770e001 | 43 | return -ENOMEM; |
db11e47d SS |
44 | } |
45 | ||
c770e001 | 46 | if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) { |
db11e47d | 47 | printk(KERN_ERR "host controller already in use\n"); |
c770e001 | 48 | return -EBUSY; |
6013bbba KB |
49 | } |
50 | ||
51 | /* map available memory */ | |
c770e001 LP |
52 | iobase = ioremap_nocache(mem_start, mem_length); |
53 | if (!iobase) { | |
6013bbba | 54 | printk(KERN_ERR "Error ioremap failed\n"); |
c770e001 LP |
55 | release_mem_region(mem_start, mem_length); |
56 | return -ENOMEM; | |
db11e47d SS |
57 | } |
58 | ||
59 | /* bad pci latencies can contribute to overruns */ | |
60 | pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); | |
61 | if (latency) { | |
62 | pci_read_config_byte(dev, PCI_MAX_LAT, &limit); | |
63 | if (limit && limit < latency) | |
64 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); | |
65 | } | |
66 | ||
67 | /* Try to check whether we can access Scratch Register of | |
68 | * Host Controller or not. The initial PCI access is retried until | |
69 | * local init for the PCI bridge is completed | |
70 | */ | |
71 | retry_count = 20; | |
72 | reg_data = 0; | |
73 | while ((reg_data != 0xFACE) && retry_count) { | |
74 | /*by default host is in 16bit mode, so | |
75 | * io operations at this stage must be 16 bit | |
76 | * */ | |
c770e001 | 77 | writel(0xface, iobase + HC_SCRATCH_REG); |
db11e47d | 78 | udelay(100); |
c770e001 | 79 | reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff; |
db11e47d SS |
80 | retry_count--; |
81 | } | |
82 | ||
c770e001 LP |
83 | iounmap(iobase); |
84 | release_mem_region(mem_start, mem_length); | |
6013bbba | 85 | |
db11e47d SS |
86 | /* Host Controller presence is detected by writing to scratch register |
87 | * and reading back and checking the contents are same or not | |
88 | */ | |
89 | if (reg_data != 0xFACE) { | |
802f389a | 90 | dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); |
c770e001 | 91 | return -ENOMEM; |
db11e47d SS |
92 | } |
93 | ||
c770e001 LP |
94 | /* Grab the PLX PCI mem maped port start address we need */ |
95 | mem_start = pci_resource_start(dev, 0); | |
96 | mem_length = pci_resource_len(dev, 0); | |
97 | ||
98 | if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) { | |
99 | printk(KERN_ERR "request region #1\n"); | |
100 | return -EBUSY; | |
101 | } | |
102 | ||
103 | iobase = ioremap_nocache(mem_start, mem_length); | |
104 | if (!iobase) { | |
105 | printk(KERN_ERR "ioremap #1\n"); | |
106 | release_mem_region(mem_start, mem_length); | |
107 | return -ENOMEM; | |
108 | } | |
db11e47d | 109 | |
6013bbba KB |
110 | /* configure PLX PCI chip to pass interrupts */ |
111 | #define PLX_INT_CSR_REG 0x68 | |
112 | reg_data = readl(iobase + PLX_INT_CSR_REG); | |
113 | reg_data |= 0x900; | |
114 | writel(reg_data, iobase + PLX_INT_CSR_REG); | |
db11e47d | 115 | |
6013bbba | 116 | /* done with PLX IO access */ |
db11e47d | 117 | iounmap(iobase); |
c770e001 LP |
118 | release_mem_region(mem_start, mem_length); |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static int isp1761_pci_probe(struct pci_dev *dev, | |
124 | const struct pci_device_id *id) | |
125 | { | |
126 | unsigned int devflags = 0; | |
127 | int ret; | |
128 | ||
129 | if (usb_disabled()) | |
130 | return -ENODEV; | |
131 | ||
132 | if (!dev->irq) | |
133 | return -ENODEV; | |
134 | ||
135 | if (pci_enable_device(dev) < 0) | |
136 | return -ENODEV; | |
137 | ||
138 | ret = isp1761_pci_init(dev); | |
139 | if (ret < 0) | |
140 | goto error; | |
141 | ||
142 | pci_set_master(dev); | |
6013bbba | 143 | |
10feee14 | 144 | dev->dev.dma_mask = NULL; |
667c45c2 LP |
145 | ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev, |
146 | devflags); | |
c770e001 LP |
147 | if (ret < 0) |
148 | goto error; | |
6013bbba | 149 | |
c770e001 LP |
150 | return 0; |
151 | ||
152 | error: | |
153 | pci_disable_device(dev); | |
154 | return ret; | |
db11e47d | 155 | } |
6013bbba | 156 | |
db11e47d SS |
157 | static void isp1761_pci_remove(struct pci_dev *dev) |
158 | { | |
10c73f09 | 159 | isp1760_unregister(&dev->dev); |
db11e47d SS |
160 | |
161 | pci_disable_device(dev); | |
db11e47d SS |
162 | } |
163 | ||
164 | static void isp1761_pci_shutdown(struct pci_dev *dev) | |
165 | { | |
166 | printk(KERN_ERR "ips1761_pci_shutdown\n"); | |
167 | } | |
168 | ||
6c073568 SAS |
169 | static const struct pci_device_id isp1760_plx [] = { |
170 | { | |
171 | .class = PCI_CLASS_BRIDGE_OTHER << 8, | |
172 | .class_mask = ~0, | |
173 | .vendor = PCI_VENDOR_ID_PLX, | |
174 | .device = 0x5406, | |
175 | .subvendor = PCI_VENDOR_ID_PLX, | |
176 | .subdevice = 0x9054, | |
177 | }, | |
178 | { } | |
db11e47d SS |
179 | }; |
180 | MODULE_DEVICE_TABLE(pci, isp1760_plx); | |
181 | ||
182 | static struct pci_driver isp1761_pci_driver = { | |
183 | .name = "isp1760", | |
184 | .id_table = isp1760_plx, | |
185 | .probe = isp1761_pci_probe, | |
186 | .remove = isp1761_pci_remove, | |
187 | .shutdown = isp1761_pci_shutdown, | |
188 | }; | |
189 | #endif | |
190 | ||
41ac7b3a | 191 | static int isp1760_plat_probe(struct platform_device *pdev) |
f7e7aa58 | 192 | { |
667c45c2 | 193 | unsigned long irqflags; |
c3cc40cc | 194 | unsigned int devflags = 0; |
f7e7aa58 CM |
195 | struct resource *mem_res; |
196 | struct resource *irq_res; | |
c3cc40cc | 197 | int ret; |
f7e7aa58 CM |
198 | |
199 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
f7e7aa58 CM |
200 | |
201 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
202 | if (!irq_res) { | |
203 | pr_warning("isp1760: IRQ resource not available\n"); | |
10feee14 | 204 | return -ENODEV; |
f7e7aa58 | 205 | } |
667c45c2 | 206 | irqflags = irq_res->flags & IRQF_TRIGGER_MASK; |
f7e7aa58 | 207 | |
c3cc40cc LP |
208 | if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { |
209 | struct device_node *dp = pdev->dev.of_node; | |
210 | u32 bus_width = 0; | |
211 | ||
212 | if (of_device_is_compatible(dp, "nxp,usb-isp1761")) | |
9da69c60 | 213 | devflags |= ISP1760_FLAG_ISP1761; |
c3cc40cc LP |
214 | |
215 | /* Some systems wire up only 16 of the 32 data lines */ | |
216 | of_property_read_u32(dp, "bus-width", &bus_width); | |
217 | if (bus_width == 16) | |
9da69c60 | 218 | devflags |= ISP1760_FLAG_BUS_WIDTH_16; |
c3cc40cc LP |
219 | |
220 | if (of_property_read_bool(dp, "port1-otg")) | |
9da69c60 | 221 | devflags |= ISP1760_FLAG_OTG_EN; |
c3cc40cc LP |
222 | |
223 | if (of_property_read_bool(dp, "analog-oc")) | |
9da69c60 | 224 | devflags |= ISP1760_FLAG_ANALOG_OC; |
c3cc40cc LP |
225 | |
226 | if (of_property_read_bool(dp, "dack-polarity")) | |
9da69c60 | 227 | devflags |= ISP1760_FLAG_DACK_POL_HIGH; |
c3cc40cc LP |
228 | |
229 | if (of_property_read_bool(dp, "dreq-polarity")) | |
230 | devflags |= ISP1760_FLAG_DREQ_POL_HIGH; | |
231 | } else if (dev_get_platdata(&pdev->dev)) { | |
232 | struct isp1760_platform_data *pdata = | |
233 | dev_get_platdata(&pdev->dev); | |
234 | ||
235 | if (pdata->is_isp1761) | |
236 | devflags |= ISP1760_FLAG_ISP1761; | |
237 | if (pdata->bus_width_16) | |
238 | devflags |= ISP1760_FLAG_BUS_WIDTH_16; | |
239 | if (pdata->port1_otg) | |
240 | devflags |= ISP1760_FLAG_OTG_EN; | |
241 | if (pdata->analog_oc) | |
242 | devflags |= ISP1760_FLAG_ANALOG_OC; | |
243 | if (pdata->dack_polarity_high) | |
244 | devflags |= ISP1760_FLAG_DACK_POL_HIGH; | |
245 | if (pdata->dreq_polarity_high) | |
9da69c60 MH |
246 | devflags |= ISP1760_FLAG_DREQ_POL_HIGH; |
247 | } | |
248 | ||
4942e00e LP |
249 | ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev, |
250 | devflags); | |
f0bdbb0e | 251 | if (ret < 0) |
10feee14 | 252 | return ret; |
f7e7aa58 CM |
253 | |
254 | pr_info("ISP1760 USB device initialised\n"); | |
c3cc40cc | 255 | return 0; |
f7e7aa58 CM |
256 | } |
257 | ||
fb4e98ab | 258 | static int isp1760_plat_remove(struct platform_device *pdev) |
f7e7aa58 | 259 | { |
10c73f09 | 260 | isp1760_unregister(&pdev->dev); |
310e9e33 | 261 | |
f7e7aa58 CM |
262 | return 0; |
263 | } | |
264 | ||
c3cc40cc LP |
265 | #ifdef CONFIG_OF |
266 | static const struct of_device_id isp1760_of_match[] = { | |
267 | { .compatible = "nxp,usb-isp1760", }, | |
268 | { .compatible = "nxp,usb-isp1761", }, | |
269 | { }, | |
270 | }; | |
271 | MODULE_DEVICE_TABLE(of, isp1760_of_match); | |
272 | #endif | |
273 | ||
f7e7aa58 CM |
274 | static struct platform_driver isp1760_plat_driver = { |
275 | .probe = isp1760_plat_probe, | |
7690417d | 276 | .remove = isp1760_plat_remove, |
f7e7aa58 CM |
277 | .driver = { |
278 | .name = "isp1760", | |
c3cc40cc | 279 | .of_match_table = of_match_ptr(isp1760_of_match), |
f7e7aa58 CM |
280 | }, |
281 | }; | |
282 | ||
db11e47d SS |
283 | static int __init isp1760_init(void) |
284 | { | |
f7e7aa58 | 285 | int ret, any_ret = -ENODEV; |
db11e47d | 286 | |
5a6356ac | 287 | isp1760_init_kmem_once(); |
db11e47d | 288 | |
f7e7aa58 CM |
289 | ret = platform_driver_register(&isp1760_plat_driver); |
290 | if (!ret) | |
291 | any_ret = 0; | |
ff30bf1c | 292 | #ifdef CONFIG_PCI |
db11e47d | 293 | ret = pci_register_driver(&isp1761_pci_driver); |
f7e7aa58 CM |
294 | if (!ret) |
295 | any_ret = 0; | |
db11e47d | 296 | #endif |
db11e47d | 297 | |
f7e7aa58 | 298 | if (any_ret) |
5a6356ac | 299 | isp1760_deinit_kmem_cache(); |
f7e7aa58 | 300 | return any_ret; |
db11e47d SS |
301 | } |
302 | module_init(isp1760_init); | |
303 | ||
304 | static void __exit isp1760_exit(void) | |
305 | { | |
f7e7aa58 | 306 | platform_driver_unregister(&isp1760_plat_driver); |
ff30bf1c | 307 | #ifdef CONFIG_PCI |
db11e47d SS |
308 | pci_unregister_driver(&isp1761_pci_driver); |
309 | #endif | |
5a6356ac | 310 | isp1760_deinit_kmem_cache(); |
db11e47d SS |
311 | } |
312 | module_exit(isp1760_exit); |