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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
db11e47d SS |
2 | /* |
3 | * Glue code for the ISP1760 driver and bus | |
4 | * Currently there is support for | |
5 | * - OpenFirmware | |
6 | * - PCI | |
9da69c60 | 7 | * - PDEV (generic platform device centralized driver model) |
db11e47d SS |
8 | * |
9 | * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/usb.h> | |
14 | #include <linux/io.h> | |
6eb0de82 | 15 | #include <linux/module.h> |
c3cc40cc | 16 | #include <linux/of.h> |
f7e7aa58 | 17 | #include <linux/platform_device.h> |
c3cc40cc | 18 | #include <linux/slab.h> |
9da69c60 | 19 | #include <linux/usb/isp1760.h> |
27729aad | 20 | #include <linux/usb/hcd.h> |
db11e47d | 21 | |
4b1a577d | 22 | #include "isp1760-core.h" |
e19c99e7 | 23 | #include "isp1760-regs.h" |
db11e47d | 24 | |
2c93e790 | 25 | #ifdef CONFIG_USB_PCI |
db11e47d SS |
26 | #include <linux/pci.h> |
27 | #endif | |
28 | ||
2c93e790 | 29 | #ifdef CONFIG_USB_PCI |
c770e001 | 30 | static int isp1761_pci_init(struct pci_dev *dev) |
db11e47d | 31 | { |
c770e001 LP |
32 | resource_size_t mem_start; |
33 | resource_size_t mem_length; | |
34 | u8 __iomem *iobase; | |
db11e47d | 35 | u8 latency, limit; |
db11e47d | 36 | int retry_count; |
c770e001 | 37 | u32 reg_data; |
db11e47d | 38 | |
db11e47d | 39 | /* Grab the PLX PCI shared memory of the ISP 1761 we need */ |
c770e001 LP |
40 | mem_start = pci_resource_start(dev, 3); |
41 | mem_length = pci_resource_len(dev, 3); | |
42 | if (mem_length < 0xffff) { | |
6013bbba | 43 | printk(KERN_ERR "memory length for this resource is wrong\n"); |
c770e001 | 44 | return -ENOMEM; |
db11e47d SS |
45 | } |
46 | ||
c770e001 | 47 | if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) { |
db11e47d | 48 | printk(KERN_ERR "host controller already in use\n"); |
c770e001 | 49 | return -EBUSY; |
6013bbba KB |
50 | } |
51 | ||
52 | /* map available memory */ | |
c770e001 LP |
53 | iobase = ioremap_nocache(mem_start, mem_length); |
54 | if (!iobase) { | |
6013bbba | 55 | printk(KERN_ERR "Error ioremap failed\n"); |
c770e001 LP |
56 | release_mem_region(mem_start, mem_length); |
57 | return -ENOMEM; | |
db11e47d SS |
58 | } |
59 | ||
60 | /* bad pci latencies can contribute to overruns */ | |
61 | pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); | |
62 | if (latency) { | |
63 | pci_read_config_byte(dev, PCI_MAX_LAT, &limit); | |
64 | if (limit && limit < latency) | |
65 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); | |
66 | } | |
67 | ||
68 | /* Try to check whether we can access Scratch Register of | |
69 | * Host Controller or not. The initial PCI access is retried until | |
70 | * local init for the PCI bridge is completed | |
71 | */ | |
72 | retry_count = 20; | |
73 | reg_data = 0; | |
74 | while ((reg_data != 0xFACE) && retry_count) { | |
75 | /*by default host is in 16bit mode, so | |
76 | * io operations at this stage must be 16 bit | |
77 | * */ | |
c770e001 | 78 | writel(0xface, iobase + HC_SCRATCH_REG); |
db11e47d | 79 | udelay(100); |
c770e001 | 80 | reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff; |
db11e47d SS |
81 | retry_count--; |
82 | } | |
83 | ||
c770e001 LP |
84 | iounmap(iobase); |
85 | release_mem_region(mem_start, mem_length); | |
6013bbba | 86 | |
db11e47d SS |
87 | /* Host Controller presence is detected by writing to scratch register |
88 | * and reading back and checking the contents are same or not | |
89 | */ | |
90 | if (reg_data != 0xFACE) { | |
802f389a | 91 | dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); |
c770e001 | 92 | return -ENOMEM; |
db11e47d SS |
93 | } |
94 | ||
c770e001 LP |
95 | /* Grab the PLX PCI mem maped port start address we need */ |
96 | mem_start = pci_resource_start(dev, 0); | |
97 | mem_length = pci_resource_len(dev, 0); | |
98 | ||
99 | if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) { | |
100 | printk(KERN_ERR "request region #1\n"); | |
101 | return -EBUSY; | |
102 | } | |
103 | ||
104 | iobase = ioremap_nocache(mem_start, mem_length); | |
105 | if (!iobase) { | |
106 | printk(KERN_ERR "ioremap #1\n"); | |
107 | release_mem_region(mem_start, mem_length); | |
108 | return -ENOMEM; | |
109 | } | |
db11e47d | 110 | |
6013bbba KB |
111 | /* configure PLX PCI chip to pass interrupts */ |
112 | #define PLX_INT_CSR_REG 0x68 | |
113 | reg_data = readl(iobase + PLX_INT_CSR_REG); | |
114 | reg_data |= 0x900; | |
115 | writel(reg_data, iobase + PLX_INT_CSR_REG); | |
db11e47d | 116 | |
6013bbba | 117 | /* done with PLX IO access */ |
db11e47d | 118 | iounmap(iobase); |
c770e001 LP |
119 | release_mem_region(mem_start, mem_length); |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static int isp1761_pci_probe(struct pci_dev *dev, | |
125 | const struct pci_device_id *id) | |
126 | { | |
127 | unsigned int devflags = 0; | |
128 | int ret; | |
129 | ||
c770e001 LP |
130 | if (!dev->irq) |
131 | return -ENODEV; | |
132 | ||
133 | if (pci_enable_device(dev) < 0) | |
134 | return -ENODEV; | |
135 | ||
136 | ret = isp1761_pci_init(dev); | |
137 | if (ret < 0) | |
138 | goto error; | |
139 | ||
140 | pci_set_master(dev); | |
6013bbba | 141 | |
10feee14 | 142 | dev->dev.dma_mask = NULL; |
667c45c2 LP |
143 | ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev, |
144 | devflags); | |
c770e001 LP |
145 | if (ret < 0) |
146 | goto error; | |
6013bbba | 147 | |
c770e001 LP |
148 | return 0; |
149 | ||
150 | error: | |
151 | pci_disable_device(dev); | |
152 | return ret; | |
db11e47d | 153 | } |
6013bbba | 154 | |
db11e47d SS |
155 | static void isp1761_pci_remove(struct pci_dev *dev) |
156 | { | |
10c73f09 | 157 | isp1760_unregister(&dev->dev); |
db11e47d SS |
158 | |
159 | pci_disable_device(dev); | |
db11e47d SS |
160 | } |
161 | ||
162 | static void isp1761_pci_shutdown(struct pci_dev *dev) | |
163 | { | |
164 | printk(KERN_ERR "ips1761_pci_shutdown\n"); | |
165 | } | |
166 | ||
2b320d87 | 167 | static const struct pci_device_id isp1760_plx[] = { |
6c073568 SAS |
168 | { |
169 | .class = PCI_CLASS_BRIDGE_OTHER << 8, | |
170 | .class_mask = ~0, | |
171 | .vendor = PCI_VENDOR_ID_PLX, | |
172 | .device = 0x5406, | |
173 | .subvendor = PCI_VENDOR_ID_PLX, | |
174 | .subdevice = 0x9054, | |
175 | }, | |
176 | { } | |
db11e47d SS |
177 | }; |
178 | MODULE_DEVICE_TABLE(pci, isp1760_plx); | |
179 | ||
180 | static struct pci_driver isp1761_pci_driver = { | |
181 | .name = "isp1760", | |
182 | .id_table = isp1760_plx, | |
183 | .probe = isp1761_pci_probe, | |
184 | .remove = isp1761_pci_remove, | |
185 | .shutdown = isp1761_pci_shutdown, | |
186 | }; | |
187 | #endif | |
188 | ||
41ac7b3a | 189 | static int isp1760_plat_probe(struct platform_device *pdev) |
f7e7aa58 | 190 | { |
667c45c2 | 191 | unsigned long irqflags; |
c3cc40cc | 192 | unsigned int devflags = 0; |
f7e7aa58 CM |
193 | struct resource *mem_res; |
194 | struct resource *irq_res; | |
c3cc40cc | 195 | int ret; |
f7e7aa58 CM |
196 | |
197 | mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
f7e7aa58 CM |
198 | |
199 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
200 | if (!irq_res) { | |
a4e6a852 | 201 | pr_warn("isp1760: IRQ resource not available\n"); |
10feee14 | 202 | return -ENODEV; |
f7e7aa58 | 203 | } |
667c45c2 | 204 | irqflags = irq_res->flags & IRQF_TRIGGER_MASK; |
f7e7aa58 | 205 | |
c3cc40cc LP |
206 | if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) { |
207 | struct device_node *dp = pdev->dev.of_node; | |
208 | u32 bus_width = 0; | |
209 | ||
210 | if (of_device_is_compatible(dp, "nxp,usb-isp1761")) | |
9da69c60 | 211 | devflags |= ISP1760_FLAG_ISP1761; |
c3cc40cc LP |
212 | |
213 | /* Some systems wire up only 16 of the 32 data lines */ | |
214 | of_property_read_u32(dp, "bus-width", &bus_width); | |
215 | if (bus_width == 16) | |
9da69c60 | 216 | devflags |= ISP1760_FLAG_BUS_WIDTH_16; |
c3cc40cc LP |
217 | |
218 | if (of_property_read_bool(dp, "port1-otg")) | |
9da69c60 | 219 | devflags |= ISP1760_FLAG_OTG_EN; |
c3cc40cc LP |
220 | |
221 | if (of_property_read_bool(dp, "analog-oc")) | |
9da69c60 | 222 | devflags |= ISP1760_FLAG_ANALOG_OC; |
c3cc40cc LP |
223 | |
224 | if (of_property_read_bool(dp, "dack-polarity")) | |
9da69c60 | 225 | devflags |= ISP1760_FLAG_DACK_POL_HIGH; |
c3cc40cc LP |
226 | |
227 | if (of_property_read_bool(dp, "dreq-polarity")) | |
228 | devflags |= ISP1760_FLAG_DREQ_POL_HIGH; | |
229 | } else if (dev_get_platdata(&pdev->dev)) { | |
230 | struct isp1760_platform_data *pdata = | |
231 | dev_get_platdata(&pdev->dev); | |
232 | ||
233 | if (pdata->is_isp1761) | |
234 | devflags |= ISP1760_FLAG_ISP1761; | |
235 | if (pdata->bus_width_16) | |
236 | devflags |= ISP1760_FLAG_BUS_WIDTH_16; | |
237 | if (pdata->port1_otg) | |
238 | devflags |= ISP1760_FLAG_OTG_EN; | |
239 | if (pdata->analog_oc) | |
240 | devflags |= ISP1760_FLAG_ANALOG_OC; | |
241 | if (pdata->dack_polarity_high) | |
242 | devflags |= ISP1760_FLAG_DACK_POL_HIGH; | |
243 | if (pdata->dreq_polarity_high) | |
9da69c60 MH |
244 | devflags |= ISP1760_FLAG_DREQ_POL_HIGH; |
245 | } | |
246 | ||
4942e00e LP |
247 | ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev, |
248 | devflags); | |
f0bdbb0e | 249 | if (ret < 0) |
10feee14 | 250 | return ret; |
f7e7aa58 CM |
251 | |
252 | pr_info("ISP1760 USB device initialised\n"); | |
c3cc40cc | 253 | return 0; |
f7e7aa58 CM |
254 | } |
255 | ||
fb4e98ab | 256 | static int isp1760_plat_remove(struct platform_device *pdev) |
f7e7aa58 | 257 | { |
10c73f09 | 258 | isp1760_unregister(&pdev->dev); |
310e9e33 | 259 | |
f7e7aa58 CM |
260 | return 0; |
261 | } | |
262 | ||
c3cc40cc LP |
263 | #ifdef CONFIG_OF |
264 | static const struct of_device_id isp1760_of_match[] = { | |
265 | { .compatible = "nxp,usb-isp1760", }, | |
266 | { .compatible = "nxp,usb-isp1761", }, | |
267 | { }, | |
268 | }; | |
269 | MODULE_DEVICE_TABLE(of, isp1760_of_match); | |
270 | #endif | |
271 | ||
f7e7aa58 CM |
272 | static struct platform_driver isp1760_plat_driver = { |
273 | .probe = isp1760_plat_probe, | |
7690417d | 274 | .remove = isp1760_plat_remove, |
f7e7aa58 CM |
275 | .driver = { |
276 | .name = "isp1760", | |
c3cc40cc | 277 | .of_match_table = of_match_ptr(isp1760_of_match), |
f7e7aa58 CM |
278 | }, |
279 | }; | |
280 | ||
db11e47d SS |
281 | static int __init isp1760_init(void) |
282 | { | |
f7e7aa58 | 283 | int ret, any_ret = -ENODEV; |
db11e47d | 284 | |
5a6356ac | 285 | isp1760_init_kmem_once(); |
db11e47d | 286 | |
f7e7aa58 CM |
287 | ret = platform_driver_register(&isp1760_plat_driver); |
288 | if (!ret) | |
289 | any_ret = 0; | |
2c93e790 | 290 | #ifdef CONFIG_USB_PCI |
db11e47d | 291 | ret = pci_register_driver(&isp1761_pci_driver); |
f7e7aa58 CM |
292 | if (!ret) |
293 | any_ret = 0; | |
db11e47d | 294 | #endif |
db11e47d | 295 | |
f7e7aa58 | 296 | if (any_ret) |
5a6356ac | 297 | isp1760_deinit_kmem_cache(); |
f7e7aa58 | 298 | return any_ret; |
db11e47d SS |
299 | } |
300 | module_init(isp1760_init); | |
301 | ||
302 | static void __exit isp1760_exit(void) | |
303 | { | |
f7e7aa58 | 304 | platform_driver_unregister(&isp1760_plat_driver); |
2c93e790 | 305 | #ifdef CONFIG_USB_PCI |
db11e47d SS |
306 | pci_unregister_driver(&isp1761_pci_driver); |
307 | #endif | |
5a6356ac | 308 | isp1760_deinit_kmem_cache(); |
db11e47d SS |
309 | } |
310 | module_exit(isp1760_exit); |