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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Driver for the PLX NET2280 USB device controller. | |
3 | * Specs and errata are available from <http://www.plxtech.com>. | |
4 | * | |
901b3d75 | 5 | * PLX Technology Inc. (formerly NetChip Technology) supported the |
1da177e4 LT |
6 | * development of this driver. |
7 | * | |
8 | * | |
9 | * CODE STATUS HIGHLIGHTS | |
10 | * | |
11 | * This driver should work well with most "gadget" drivers, including | |
fa06920a | 12 | * the Mass Storage, Serial, and Ethernet/RNDIS gadget drivers |
1da177e4 LT |
13 | * as well as Gadget Zero and Gadgetfs. |
14 | * | |
15 | * DMA is enabled by default. Drivers using transfer queues might use | |
16 | * DMA chaining to remove IRQ latencies between transfers. (Except when | |
17 | * short OUT transfers happen.) Drivers can use the req->no_interrupt | |
18 | * hint to completely eliminate some IRQs, if a later IRQ is guaranteed | |
19 | * and DMA chaining is enabled. | |
20 | * | |
adc82f77 RR |
21 | * MSI is enabled by default. The legacy IRQ is used if MSI couldn't |
22 | * be enabled. | |
23 | * | |
1da177e4 LT |
24 | * Note that almost all the errata workarounds here are only needed for |
25 | * rev1 chips. Rev1a silicon (0110) fixes almost all of them. | |
26 | */ | |
27 | ||
28 | /* | |
29 | * Copyright (C) 2003 David Brownell | |
30 | * Copyright (C) 2003-2005 PLX Technology, Inc. | |
adc82f77 | 31 | * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS |
1da177e4 | 32 | * |
901b3d75 DB |
33 | * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility |
34 | * with 2282 chip | |
950ee4c8 | 35 | * |
adc82f77 RR |
36 | * Modified Ricardo Ribalda Qtechnology AS to provide compatibility |
37 | * with usb 338x chip. Based on PLX driver | |
38 | * | |
1da177e4 LT |
39 | * This program is free software; you can redistribute it and/or modify |
40 | * it under the terms of the GNU General Public License as published by | |
41 | * the Free Software Foundation; either version 2 of the License, or | |
42 | * (at your option) any later version. | |
1da177e4 LT |
43 | */ |
44 | ||
45 | #undef DEBUG /* messages on error and most fault paths */ | |
46 | #undef VERBOSE /* extra debug messages (success too) */ | |
47 | ||
1da177e4 LT |
48 | #include <linux/module.h> |
49 | #include <linux/pci.h> | |
682d4c80 | 50 | #include <linux/dma-mapping.h> |
1da177e4 LT |
51 | #include <linux/kernel.h> |
52 | #include <linux/delay.h> | |
53 | #include <linux/ioport.h> | |
1da177e4 | 54 | #include <linux/slab.h> |
1da177e4 LT |
55 | #include <linux/errno.h> |
56 | #include <linux/init.h> | |
57 | #include <linux/timer.h> | |
58 | #include <linux/list.h> | |
59 | #include <linux/interrupt.h> | |
60 | #include <linux/moduleparam.h> | |
61 | #include <linux/device.h> | |
5f848137 | 62 | #include <linux/usb/ch9.h> |
9454a57a | 63 | #include <linux/usb/gadget.h> |
b38b03b3 | 64 | #include <linux/prefetch.h> |
1da177e4 LT |
65 | |
66 | #include <asm/byteorder.h> | |
67 | #include <asm/io.h> | |
68 | #include <asm/irq.h> | |
1da177e4 LT |
69 | #include <asm/unaligned.h> |
70 | ||
adc82f77 RR |
71 | #define DRIVER_DESC "PLX NET228x/USB338x USB Peripheral Controller" |
72 | #define DRIVER_VERSION "2005 Sept 27/v3.0" | |
1da177e4 | 73 | |
1da177e4 LT |
74 | #define EP_DONTUSE 13 /* nonzero */ |
75 | ||
76 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ | |
77 | ||
78 | ||
79 | static const char driver_name [] = "net2280"; | |
80 | static const char driver_desc [] = DRIVER_DESC; | |
81 | ||
adc82f77 | 82 | static const u32 ep_bit[9] = { 0, 17, 2, 19, 4, 1, 18, 3, 20 }; |
1da177e4 | 83 | static const char ep0name [] = "ep0"; |
901b3d75 | 84 | static const char *const ep_name [] = { |
1da177e4 LT |
85 | ep0name, |
86 | "ep-a", "ep-b", "ep-c", "ep-d", | |
adc82f77 | 87 | "ep-e", "ep-f", "ep-g", "ep-h", |
1da177e4 LT |
88 | }; |
89 | ||
90 | /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO) | |
91 | * use_dma_chaining -- dma descriptor queueing gives even more irq reduction | |
92 | * | |
93 | * The net2280 DMA engines are not tightly integrated with their FIFOs; | |
94 | * not all cases are (yet) handled well in this driver or the silicon. | |
95 | * Some gadget drivers work better with the dma support here than others. | |
96 | * These two parameters let you use PIO or more aggressive DMA. | |
97 | */ | |
90ab5ee9 RR |
98 | static bool use_dma = 1; |
99 | static bool use_dma_chaining = 0; | |
adc82f77 | 100 | static bool use_msi = 1; |
1da177e4 LT |
101 | |
102 | /* "modprobe net2280 use_dma=n" etc */ | |
103 | module_param (use_dma, bool, S_IRUGO); | |
104 | module_param (use_dma_chaining, bool, S_IRUGO); | |
adc82f77 | 105 | module_param(use_msi, bool, S_IRUGO); |
1da177e4 LT |
106 | |
107 | /* mode 0 == ep-{a,b,c,d} 1K fifo each | |
108 | * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable | |
109 | * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable | |
110 | */ | |
111 | static ushort fifo_mode = 0; | |
112 | ||
113 | /* "modprobe net2280 fifo_mode=1" etc */ | |
114 | module_param (fifo_mode, ushort, 0644); | |
115 | ||
116 | /* enable_suspend -- When enabled, the driver will respond to | |
117 | * USB suspend requests by powering down the NET2280. Otherwise, | |
25985edc | 118 | * USB suspend requests will be ignored. This is acceptable for |
950ee4c8 | 119 | * self-powered devices |
1da177e4 | 120 | */ |
90ab5ee9 | 121 | static bool enable_suspend = 0; |
1da177e4 LT |
122 | |
123 | /* "modprobe net2280 enable_suspend=1" etc */ | |
124 | module_param (enable_suspend, bool, S_IRUGO); | |
125 | ||
2f076077 AS |
126 | /* force full-speed operation */ |
127 | static bool full_speed; | |
128 | module_param(full_speed, bool, 0444); | |
129 | MODULE_PARM_DESC(full_speed, "force full-speed mode -- for testing only!"); | |
1da177e4 LT |
130 | |
131 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") | |
132 | ||
133 | #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG) | |
134 | static char *type_string (u8 bmAttributes) | |
135 | { | |
136 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { | |
137 | case USB_ENDPOINT_XFER_BULK: return "bulk"; | |
138 | case USB_ENDPOINT_XFER_ISOC: return "iso"; | |
139 | case USB_ENDPOINT_XFER_INT: return "intr"; | |
2b84f92b | 140 | } |
1da177e4 LT |
141 | return "control"; |
142 | } | |
143 | #endif | |
144 | ||
145 | #include "net2280.h" | |
146 | ||
3e76fdcb RR |
147 | #define valid_bit cpu_to_le32(BIT(VALID_BIT)) |
148 | #define dma_done_ie cpu_to_le32(BIT(DMA_DONE_INTERRUPT_ENABLE)) | |
1da177e4 LT |
149 | |
150 | /*-------------------------------------------------------------------------*/ | |
adc82f77 RR |
151 | static inline void enable_pciirqenb(struct net2280_ep *ep) |
152 | { | |
153 | u32 tmp = readl(&ep->dev->regs->pciirqenb0); | |
154 | ||
c2db8a8a | 155 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
3e76fdcb | 156 | tmp |= BIT(ep->num); |
adc82f77 | 157 | else |
3e76fdcb | 158 | tmp |= BIT(ep_bit[ep->num]); |
adc82f77 RR |
159 | writel(tmp, &ep->dev->regs->pciirqenb0); |
160 | ||
161 | return; | |
162 | } | |
1da177e4 LT |
163 | |
164 | static int | |
165 | net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) | |
166 | { | |
167 | struct net2280 *dev; | |
168 | struct net2280_ep *ep; | |
169 | u32 max, tmp; | |
170 | unsigned long flags; | |
adc82f77 | 171 | static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 }; |
1da177e4 LT |
172 | |
173 | ep = container_of (_ep, struct net2280_ep, ep); | |
174 | if (!_ep || !desc || ep->desc || _ep->name == ep0name | |
175 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
176 | return -EINVAL; | |
177 | dev = ep->dev; | |
178 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
179 | return -ESHUTDOWN; | |
180 | ||
181 | /* erratum 0119 workaround ties up an endpoint number */ | |
182 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) | |
183 | return -EDOM; | |
184 | ||
c2db8a8a | 185 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) { |
adc82f77 RR |
186 | if ((desc->bEndpointAddress & 0x0f) >= 0x0c) |
187 | return -EDOM; | |
188 | ep->is_in = !!usb_endpoint_dir_in(desc); | |
189 | if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
1da177e4 | 193 | /* sanity check ep-e/ep-f since their fifos are small */ |
29cc8897 | 194 | max = usb_endpoint_maxp (desc) & 0x1fff; |
c2db8a8a RR |
195 | if (ep->num > 4 && max > 64 && |
196 | (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY)) | |
1da177e4 LT |
197 | return -ERANGE; |
198 | ||
199 | spin_lock_irqsave (&dev->lock, flags); | |
200 | _ep->maxpacket = max & 0x7ff; | |
201 | ep->desc = desc; | |
202 | ||
203 | /* ep_reset() has already been called */ | |
204 | ep->stopped = 0; | |
8066134f | 205 | ep->wedged = 0; |
1da177e4 LT |
206 | ep->out_overflow = 0; |
207 | ||
208 | /* set speed-dependent max packet; may kick in high bandwidth */ | |
adc82f77 | 209 | set_max_speed(ep, max); |
1da177e4 LT |
210 | |
211 | /* FIFO lines can't go to different packets. PIO is ok, so | |
212 | * use it instead of troublesome (non-bulk) multi-packet DMA. | |
213 | */ | |
214 | if (ep->dma && (max % 4) != 0 && use_dma_chaining) { | |
215 | DEBUG (ep->dev, "%s, no dma for maxpacket %d\n", | |
216 | ep->ep.name, ep->ep.maxpacket); | |
217 | ep->dma = NULL; | |
218 | } | |
219 | ||
220 | /* set type, direction, address; reset fifo counters */ | |
3e76fdcb | 221 | writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); |
1da177e4 LT |
222 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); |
223 | if (tmp == USB_ENDPOINT_XFER_INT) { | |
224 | /* erratum 0105 workaround prevents hs NYET */ | |
225 | if (dev->chiprev == 0100 | |
226 | && dev->gadget.speed == USB_SPEED_HIGH | |
227 | && !(desc->bEndpointAddress & USB_DIR_IN)) | |
3e76fdcb | 228 | writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE), |
1da177e4 LT |
229 | &ep->regs->ep_rsp); |
230 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { | |
231 | /* catch some particularly blatant driver bugs */ | |
adc82f77 RR |
232 | if ((dev->gadget.speed == USB_SPEED_SUPER && max != 1024) || |
233 | (dev->gadget.speed == USB_SPEED_HIGH && max != 512) || | |
234 | (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { | |
235 | spin_unlock_irqrestore(&dev->lock, flags); | |
1da177e4 LT |
236 | return -ERANGE; |
237 | } | |
238 | } | |
239 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0; | |
adc82f77 | 240 | /* Enable this endpoint */ |
c2db8a8a | 241 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) { |
adc82f77 RR |
242 | tmp <<= ENDPOINT_TYPE; |
243 | tmp |= desc->bEndpointAddress; | |
244 | /* default full fifo lines */ | |
245 | tmp |= (4 << ENDPOINT_BYTE_COUNT); | |
3e76fdcb | 246 | tmp |= BIT(ENDPOINT_ENABLE); |
adc82f77 RR |
247 | ep->is_in = (tmp & USB_DIR_IN) != 0; |
248 | } else { | |
249 | /* In Legacy mode, only OUT endpoints are used */ | |
250 | if (dev->enhanced_mode && ep->is_in) { | |
251 | tmp <<= IN_ENDPOINT_TYPE; | |
3e76fdcb | 252 | tmp |= BIT(IN_ENDPOINT_ENABLE); |
adc82f77 | 253 | /* Not applicable to Legacy */ |
3e76fdcb | 254 | tmp |= BIT(ENDPOINT_DIRECTION); |
adc82f77 RR |
255 | } else { |
256 | tmp <<= OUT_ENDPOINT_TYPE; | |
3e76fdcb | 257 | tmp |= BIT(OUT_ENDPOINT_ENABLE); |
adc82f77 RR |
258 | tmp |= (ep->is_in << ENDPOINT_DIRECTION); |
259 | } | |
260 | ||
261 | tmp |= usb_endpoint_num(desc); | |
262 | tmp |= (ep->ep.maxburst << MAX_BURST_SIZE); | |
263 | } | |
264 | ||
265 | /* Make sure all the registers are written before ep_rsp*/ | |
266 | wmb(); | |
1da177e4 LT |
267 | |
268 | /* for OUT transfers, block the rx fifo until a read is posted */ | |
1da177e4 | 269 | if (!ep->is_in) |
3e76fdcb | 270 | writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
950ee4c8 | 271 | else if (dev->pdev->device != 0x2280) { |
901b3d75 DB |
272 | /* Added for 2282, Don't use nak packets on an in endpoint, |
273 | * this was ignored on 2280 | |
274 | */ | |
3e76fdcb RR |
275 | writel(BIT(CLEAR_NAK_OUT_PACKETS) | |
276 | BIT(CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); | |
950ee4c8 | 277 | } |
1da177e4 | 278 | |
adc82f77 | 279 | writel(tmp, &ep->cfg->ep_cfg); |
1da177e4 LT |
280 | |
281 | /* enable irqs */ | |
282 | if (!ep->dma) { /* pio, per-packet */ | |
adc82f77 | 283 | enable_pciirqenb(ep); |
1da177e4 | 284 | |
3e76fdcb RR |
285 | tmp = BIT(DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) | |
286 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); | |
950ee4c8 GL |
287 | if (dev->pdev->device == 0x2280) |
288 | tmp |= readl (&ep->regs->ep_irqenb); | |
1da177e4 LT |
289 | writel (tmp, &ep->regs->ep_irqenb); |
290 | } else { /* dma, per-request */ | |
3e76fdcb | 291 | tmp = BIT((8 + ep->num)); /* completion */ |
1da177e4 LT |
292 | tmp |= readl (&dev->regs->pciirqenb1); |
293 | writel (tmp, &dev->regs->pciirqenb1); | |
294 | ||
295 | /* for short OUT transfers, dma completions can't | |
296 | * advance the queue; do it pio-style, by hand. | |
297 | * NOTE erratum 0112 workaround #2 | |
298 | */ | |
299 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { | |
3e76fdcb | 300 | tmp = BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); |
1da177e4 LT |
301 | writel (tmp, &ep->regs->ep_irqenb); |
302 | ||
adc82f77 | 303 | enable_pciirqenb(ep); |
1da177e4 LT |
304 | } |
305 | } | |
306 | ||
307 | tmp = desc->bEndpointAddress; | |
308 | DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n", | |
309 | _ep->name, tmp & 0x0f, DIR_STRING (tmp), | |
310 | type_string (desc->bmAttributes), | |
311 | ep->dma ? "dma" : "pio", max); | |
312 | ||
313 | /* pci writes may still be posted */ | |
314 | spin_unlock_irqrestore (&dev->lock, flags); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec) | |
319 | { | |
320 | u32 result; | |
321 | ||
322 | do { | |
323 | result = readl (ptr); | |
324 | if (result == ~(u32)0) /* "device unplugged" */ | |
325 | return -ENODEV; | |
326 | result &= mask; | |
327 | if (result == done) | |
328 | return 0; | |
329 | udelay (1); | |
330 | usec--; | |
331 | } while (usec > 0); | |
332 | return -ETIMEDOUT; | |
333 | } | |
334 | ||
901b3d75 | 335 | static const struct usb_ep_ops net2280_ep_ops; |
1da177e4 | 336 | |
adc82f77 RR |
337 | static void ep_reset_228x(struct net2280_regs __iomem *regs, |
338 | struct net2280_ep *ep) | |
1da177e4 LT |
339 | { |
340 | u32 tmp; | |
341 | ||
342 | ep->desc = NULL; | |
343 | INIT_LIST_HEAD (&ep->queue); | |
344 | ||
e117e742 | 345 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
1da177e4 LT |
346 | ep->ep.ops = &net2280_ep_ops; |
347 | ||
348 | /* disable the dma, irqs, endpoint... */ | |
349 | if (ep->dma) { | |
350 | writel (0, &ep->dma->dmactl); | |
3e76fdcb RR |
351 | writel(BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
352 | BIT(DMA_TRANSACTION_DONE_INTERRUPT) | | |
353 | BIT(DMA_ABORT), | |
354 | &ep->dma->dmastat); | |
1da177e4 LT |
355 | |
356 | tmp = readl (®s->pciirqenb0); | |
3e76fdcb | 357 | tmp &= ~BIT(ep->num); |
1da177e4 LT |
358 | writel (tmp, ®s->pciirqenb0); |
359 | } else { | |
360 | tmp = readl (®s->pciirqenb1); | |
3e76fdcb | 361 | tmp &= ~BIT((8 + ep->num)); /* completion */ |
1da177e4 LT |
362 | writel (tmp, ®s->pciirqenb1); |
363 | } | |
364 | writel (0, &ep->regs->ep_irqenb); | |
365 | ||
366 | /* init to our chosen defaults, notably so that we NAK OUT | |
367 | * packets until the driver queues a read (+note erratum 0112) | |
368 | */ | |
950ee4c8 | 369 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) { |
3e76fdcb RR |
370 | tmp = BIT(SET_NAK_OUT_PACKETS_MODE) | |
371 | BIT(SET_NAK_OUT_PACKETS) | | |
372 | BIT(CLEAR_EP_HIDE_STATUS_PHASE) | | |
373 | BIT(CLEAR_INTERRUPT_MODE); | |
950ee4c8 GL |
374 | } else { |
375 | /* added for 2282 */ | |
3e76fdcb RR |
376 | tmp = BIT(CLEAR_NAK_OUT_PACKETS_MODE) | |
377 | BIT(CLEAR_NAK_OUT_PACKETS) | | |
378 | BIT(CLEAR_EP_HIDE_STATUS_PHASE) | | |
379 | BIT(CLEAR_INTERRUPT_MODE); | |
950ee4c8 | 380 | } |
1da177e4 LT |
381 | |
382 | if (ep->num != 0) { | |
3e76fdcb RR |
383 | tmp |= BIT(CLEAR_ENDPOINT_TOGGLE) | |
384 | BIT(CLEAR_ENDPOINT_HALT); | |
1da177e4 LT |
385 | } |
386 | writel (tmp, &ep->regs->ep_rsp); | |
387 | ||
388 | /* scrub most status bits, and flush any fifo state */ | |
950ee4c8 | 389 | if (ep->dev->pdev->device == 0x2280) |
3e76fdcb RR |
390 | tmp = BIT(FIFO_OVERFLOW) | |
391 | BIT(FIFO_UNDERFLOW); | |
950ee4c8 GL |
392 | else |
393 | tmp = 0; | |
394 | ||
3e76fdcb RR |
395 | writel(tmp | BIT(TIMEOUT) | |
396 | BIT(USB_STALL_SENT) | | |
397 | BIT(USB_IN_NAK_SENT) | | |
398 | BIT(USB_IN_ACK_RCVD) | | |
399 | BIT(USB_OUT_PING_NAK_SENT) | | |
400 | BIT(USB_OUT_ACK_SENT) | | |
401 | BIT(FIFO_FLUSH) | | |
402 | BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | | |
403 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
404 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
405 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
406 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
407 | BIT(DATA_IN_TOKEN_INTERRUPT) | |
1da177e4 LT |
408 | , &ep->regs->ep_stat); |
409 | ||
410 | /* fifo size is handled separately */ | |
411 | } | |
412 | ||
adc82f77 RR |
413 | static void ep_reset_338x(struct net2280_regs __iomem *regs, |
414 | struct net2280_ep *ep) | |
415 | { | |
416 | u32 tmp, dmastat; | |
417 | ||
418 | ep->desc = NULL; | |
419 | INIT_LIST_HEAD(&ep->queue); | |
420 | ||
421 | usb_ep_set_maxpacket_limit(&ep->ep, ~0); | |
422 | ep->ep.ops = &net2280_ep_ops; | |
423 | ||
424 | /* disable the dma, irqs, endpoint... */ | |
425 | if (ep->dma) { | |
426 | writel(0, &ep->dma->dmactl); | |
3e76fdcb RR |
427 | writel(BIT(DMA_ABORT_DONE_INTERRUPT) | |
428 | BIT(DMA_PAUSE_DONE_INTERRUPT) | | |
429 | BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | | |
430 | BIT(DMA_TRANSACTION_DONE_INTERRUPT) | |
431 | /* | BIT(DMA_ABORT) */ | |
adc82f77 RR |
432 | , &ep->dma->dmastat); |
433 | ||
434 | dmastat = readl(&ep->dma->dmastat); | |
435 | if (dmastat == 0x5002) { | |
436 | WARNING(ep->dev, "The dmastat return = %x!!\n", | |
437 | dmastat); | |
438 | writel(0x5a, &ep->dma->dmastat); | |
439 | } | |
440 | ||
441 | tmp = readl(®s->pciirqenb0); | |
3e76fdcb | 442 | tmp &= ~BIT(ep_bit[ep->num]); |
adc82f77 RR |
443 | writel(tmp, ®s->pciirqenb0); |
444 | } else { | |
445 | if (ep->num < 5) { | |
446 | tmp = readl(®s->pciirqenb1); | |
3e76fdcb | 447 | tmp &= ~BIT((8 + ep->num)); /* completion */ |
adc82f77 RR |
448 | writel(tmp, ®s->pciirqenb1); |
449 | } | |
450 | } | |
451 | writel(0, &ep->regs->ep_irqenb); | |
452 | ||
3e76fdcb RR |
453 | writel(BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | |
454 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
455 | BIT(FIFO_OVERFLOW) | | |
456 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
457 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
458 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
459 | BIT(DATA_IN_TOKEN_INTERRUPT), &ep->regs->ep_stat); | |
adc82f77 RR |
460 | } |
461 | ||
1da177e4 LT |
462 | static void nuke (struct net2280_ep *); |
463 | ||
464 | static int net2280_disable (struct usb_ep *_ep) | |
465 | { | |
466 | struct net2280_ep *ep; | |
467 | unsigned long flags; | |
468 | ||
469 | ep = container_of (_ep, struct net2280_ep, ep); | |
470 | if (!_ep || !ep->desc || _ep->name == ep0name) | |
471 | return -EINVAL; | |
472 | ||
473 | spin_lock_irqsave (&ep->dev->lock, flags); | |
474 | nuke (ep); | |
adc82f77 | 475 | |
c2db8a8a | 476 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 RR |
477 | ep_reset_338x(ep->dev->regs, ep); |
478 | else | |
479 | ep_reset_228x(ep->dev->regs, ep); | |
1da177e4 LT |
480 | |
481 | VDEBUG (ep->dev, "disabled %s %s\n", | |
482 | ep->dma ? "dma" : "pio", _ep->name); | |
483 | ||
484 | /* synch memory views with the device */ | |
adc82f77 | 485 | (void)readl(&ep->cfg->ep_cfg); |
1da177e4 LT |
486 | |
487 | if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4) | |
488 | ep->dma = &ep->dev->dma [ep->num - 1]; | |
489 | ||
490 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
491 | return 0; | |
492 | } | |
493 | ||
494 | /*-------------------------------------------------------------------------*/ | |
495 | ||
496 | static struct usb_request * | |
55016f10 | 497 | net2280_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
1da177e4 LT |
498 | { |
499 | struct net2280_ep *ep; | |
500 | struct net2280_request *req; | |
501 | ||
502 | if (!_ep) | |
503 | return NULL; | |
504 | ep = container_of (_ep, struct net2280_ep, ep); | |
505 | ||
7039f422 | 506 | req = kzalloc(sizeof(*req), gfp_flags); |
1da177e4 LT |
507 | if (!req) |
508 | return NULL; | |
509 | ||
1da177e4 LT |
510 | INIT_LIST_HEAD (&req->queue); |
511 | ||
512 | /* this dma descriptor may be swapped with the previous dummy */ | |
513 | if (ep->dma) { | |
514 | struct net2280_dma *td; | |
515 | ||
516 | td = pci_pool_alloc (ep->dev->requests, gfp_flags, | |
517 | &req->td_dma); | |
518 | if (!td) { | |
519 | kfree (req); | |
520 | return NULL; | |
521 | } | |
522 | td->dmacount = 0; /* not VALID */ | |
1da177e4 LT |
523 | td->dmadesc = td->dmaaddr; |
524 | req->td = td; | |
525 | } | |
526 | return &req->req; | |
527 | } | |
528 | ||
529 | static void | |
530 | net2280_free_request (struct usb_ep *_ep, struct usb_request *_req) | |
531 | { | |
532 | struct net2280_ep *ep; | |
533 | struct net2280_request *req; | |
534 | ||
535 | ep = container_of (_ep, struct net2280_ep, ep); | |
536 | if (!_ep || !_req) | |
537 | return; | |
538 | ||
539 | req = container_of (_req, struct net2280_request, req); | |
540 | WARN_ON (!list_empty (&req->queue)); | |
541 | if (req->td) | |
542 | pci_pool_free (ep->dev->requests, req->td, req->td_dma); | |
543 | kfree (req); | |
544 | } | |
545 | ||
546 | /*-------------------------------------------------------------------------*/ | |
547 | ||
1da177e4 LT |
548 | /* load a packet into the fifo we use for usb IN transfers. |
549 | * works for all endpoints. | |
550 | * | |
551 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo | |
552 | * at a time, but this code is simpler because it knows it only writes | |
553 | * one packet. ep-a..ep-d should use dma instead. | |
554 | */ | |
555 | static void | |
556 | write_fifo (struct net2280_ep *ep, struct usb_request *req) | |
557 | { | |
558 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
559 | u8 *buf; | |
560 | u32 tmp; | |
561 | unsigned count, total; | |
562 | ||
563 | /* INVARIANT: fifo is currently empty. (testable) */ | |
564 | ||
565 | if (req) { | |
566 | buf = req->buf + req->actual; | |
567 | prefetch (buf); | |
568 | total = req->length - req->actual; | |
569 | } else { | |
570 | total = 0; | |
571 | buf = NULL; | |
572 | } | |
573 | ||
574 | /* write just one packet at a time */ | |
575 | count = ep->ep.maxpacket; | |
576 | if (count > total) /* min() cannot be used on a bitfield */ | |
577 | count = total; | |
578 | ||
579 | VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", | |
580 | ep->ep.name, count, | |
581 | (count != ep->ep.maxpacket) ? " (short)" : "", | |
582 | req); | |
583 | while (count >= 4) { | |
584 | /* NOTE be careful if you try to align these. fifo lines | |
585 | * should normally be full (4 bytes) and successive partial | |
586 | * lines are ok only in certain cases. | |
587 | */ | |
588 | tmp = get_unaligned ((u32 *)buf); | |
589 | cpu_to_le32s (&tmp); | |
590 | writel (tmp, ®s->ep_data); | |
591 | buf += 4; | |
592 | count -= 4; | |
593 | } | |
594 | ||
595 | /* last fifo entry is "short" unless we wrote a full packet. | |
596 | * also explicitly validate last word in (periodic) transfers | |
597 | * when maxpacket is not a multiple of 4 bytes. | |
598 | */ | |
599 | if (count || total < ep->ep.maxpacket) { | |
600 | tmp = count ? get_unaligned ((u32 *)buf) : count; | |
601 | cpu_to_le32s (&tmp); | |
602 | set_fifo_bytecount (ep, count & 0x03); | |
603 | writel (tmp, ®s->ep_data); | |
604 | } | |
605 | ||
606 | /* pci writes may still be posted */ | |
607 | } | |
608 | ||
609 | /* work around erratum 0106: PCI and USB race over the OUT fifo. | |
610 | * caller guarantees chiprev 0100, out endpoint is NAKing, and | |
611 | * there's no real data in the fifo. | |
612 | * | |
613 | * NOTE: also used in cases where that erratum doesn't apply: | |
614 | * where the host wrote "too much" data to us. | |
615 | */ | |
616 | static void out_flush (struct net2280_ep *ep) | |
617 | { | |
618 | u32 __iomem *statp; | |
619 | u32 tmp; | |
620 | ||
621 | ASSERT_OUT_NAKING (ep); | |
622 | ||
623 | statp = &ep->regs->ep_stat; | |
3e76fdcb RR |
624 | writel(BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | |
625 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | |
1da177e4 | 626 | , statp); |
3e76fdcb | 627 | writel(BIT(FIFO_FLUSH), statp); |
1da177e4 LT |
628 | mb (); |
629 | tmp = readl (statp); | |
3e76fdcb | 630 | if (tmp & BIT(DATA_OUT_PING_TOKEN_INTERRUPT) |
1da177e4 LT |
631 | /* high speed did bulk NYET; fifo isn't filling */ |
632 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
633 | unsigned usec; | |
634 | ||
635 | usec = 50; /* 64 byte bulk/interrupt */ | |
3e76fdcb RR |
636 | handshake(statp, BIT(USB_OUT_PING_NAK_SENT), |
637 | BIT(USB_OUT_PING_NAK_SENT), usec); | |
1da177e4 LT |
638 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ |
639 | } | |
640 | } | |
641 | ||
642 | /* unload packet(s) from the fifo we use for usb OUT transfers. | |
643 | * returns true iff the request completed, because of short packet | |
644 | * or the request buffer having filled with full packets. | |
645 | * | |
646 | * for ep-a..ep-d this will read multiple packets out when they | |
647 | * have been accepted. | |
648 | */ | |
649 | static int | |
650 | read_fifo (struct net2280_ep *ep, struct net2280_request *req) | |
651 | { | |
652 | struct net2280_ep_regs __iomem *regs = ep->regs; | |
653 | u8 *buf = req->req.buf + req->req.actual; | |
654 | unsigned count, tmp, is_short; | |
655 | unsigned cleanup = 0, prevent = 0; | |
656 | ||
657 | /* erratum 0106 ... packets coming in during fifo reads might | |
658 | * be incompletely rejected. not all cases have workarounds. | |
659 | */ | |
660 | if (ep->dev->chiprev == 0x0100 | |
661 | && ep->dev->gadget.speed == USB_SPEED_FULL) { | |
662 | udelay (1); | |
663 | tmp = readl (&ep->regs->ep_stat); | |
3e76fdcb | 664 | if ((tmp & BIT(NAK_OUT_PACKETS))) |
1da177e4 | 665 | cleanup = 1; |
3e76fdcb | 666 | else if ((tmp & BIT(FIFO_FULL))) { |
1da177e4 LT |
667 | start_out_naking (ep); |
668 | prevent = 1; | |
669 | } | |
670 | /* else: hope we don't see the problem */ | |
671 | } | |
672 | ||
673 | /* never overflow the rx buffer. the fifo reads packets until | |
674 | * it sees a short one; we might not be ready for them all. | |
675 | */ | |
676 | prefetchw (buf); | |
677 | count = readl (®s->ep_avail); | |
678 | if (unlikely (count == 0)) { | |
679 | udelay (1); | |
680 | tmp = readl (&ep->regs->ep_stat); | |
681 | count = readl (®s->ep_avail); | |
682 | /* handled that data already? */ | |
3e76fdcb | 683 | if (count == 0 && (tmp & BIT(NAK_OUT_PACKETS)) == 0) |
1da177e4 LT |
684 | return 0; |
685 | } | |
686 | ||
687 | tmp = req->req.length - req->req.actual; | |
688 | if (count > tmp) { | |
689 | /* as with DMA, data overflow gets flushed */ | |
690 | if ((tmp % ep->ep.maxpacket) != 0) { | |
691 | ERROR (ep->dev, | |
692 | "%s out fifo %d bytes, expected %d\n", | |
693 | ep->ep.name, count, tmp); | |
694 | req->req.status = -EOVERFLOW; | |
695 | cleanup = 1; | |
696 | /* NAK_OUT_PACKETS will be set, so flushing is safe; | |
697 | * the next read will start with the next packet | |
698 | */ | |
699 | } /* else it's a ZLP, no worries */ | |
700 | count = tmp; | |
701 | } | |
702 | req->req.actual += count; | |
703 | ||
704 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); | |
705 | ||
706 | VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", | |
707 | ep->ep.name, count, is_short ? " (short)" : "", | |
708 | cleanup ? " flush" : "", prevent ? " nak" : "", | |
709 | req, req->req.actual, req->req.length); | |
710 | ||
711 | while (count >= 4) { | |
712 | tmp = readl (®s->ep_data); | |
713 | cpu_to_le32s (&tmp); | |
714 | put_unaligned (tmp, (u32 *)buf); | |
715 | buf += 4; | |
716 | count -= 4; | |
717 | } | |
718 | if (count) { | |
719 | tmp = readl (®s->ep_data); | |
720 | /* LE conversion is implicit here: */ | |
721 | do { | |
722 | *buf++ = (u8) tmp; | |
723 | tmp >>= 8; | |
724 | } while (--count); | |
725 | } | |
726 | if (cleanup) | |
727 | out_flush (ep); | |
728 | if (prevent) { | |
3e76fdcb | 729 | writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
1da177e4 LT |
730 | (void) readl (&ep->regs->ep_rsp); |
731 | } | |
732 | ||
733 | return is_short || ((req->req.actual == req->req.length) | |
734 | && !req->req.zero); | |
735 | } | |
736 | ||
737 | /* fill out dma descriptor to match a given request */ | |
738 | static void | |
739 | fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
740 | { | |
741 | struct net2280_dma *td = req->td; | |
742 | u32 dmacount = req->req.length; | |
743 | ||
744 | /* don't let DMA continue after a short OUT packet, | |
745 | * so overruns can't affect the next transfer. | |
746 | * in case of overruns on max-size packets, we can't | |
747 | * stop the fifo from filling but we can flush it. | |
748 | */ | |
749 | if (ep->is_in) | |
3e76fdcb | 750 | dmacount |= BIT(DMA_DIRECTION); |
901b3d75 DB |
751 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) |
752 | || ep->dev->pdev->device != 0x2280) | |
3e76fdcb | 753 | dmacount |= BIT(END_OF_CHAIN); |
1da177e4 LT |
754 | |
755 | req->valid = valid; | |
756 | if (valid) | |
3e76fdcb | 757 | dmacount |= BIT(VALID_BIT); |
1da177e4 | 758 | if (likely(!req->req.no_interrupt || !use_dma_chaining)) |
3e76fdcb | 759 | dmacount |= BIT(DMA_DONE_INTERRUPT_ENABLE); |
1da177e4 LT |
760 | |
761 | /* td->dmadesc = previously set by caller */ | |
762 | td->dmaaddr = cpu_to_le32 (req->req.dma); | |
763 | ||
764 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ | |
765 | wmb (); | |
da2bbdcc | 766 | td->dmacount = cpu_to_le32(dmacount); |
1da177e4 LT |
767 | } |
768 | ||
769 | static const u32 dmactl_default = | |
3e76fdcb RR |
770 | BIT(DMA_SCATTER_GATHER_DONE_INTERRUPT) | |
771 | BIT(DMA_CLEAR_COUNT_ENABLE) | | |
1da177e4 | 772 | /* erratum 0116 workaround part 1 (use POLLING) */ |
3e76fdcb RR |
773 | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) | |
774 | BIT(DMA_VALID_BIT_POLLING_ENABLE) | | |
775 | BIT(DMA_VALID_BIT_ENABLE) | | |
776 | BIT(DMA_SCATTER_GATHER_ENABLE) | | |
1da177e4 | 777 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ |
3e76fdcb | 778 | BIT(DMA_ENABLE); |
1da177e4 LT |
779 | |
780 | static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma) | |
781 | { | |
3e76fdcb | 782 | handshake(&dma->dmactl, BIT(DMA_ENABLE), 0, 50); |
1da177e4 LT |
783 | } |
784 | ||
785 | static inline void stop_dma (struct net2280_dma_regs __iomem *dma) | |
786 | { | |
3e76fdcb | 787 | writel(readl(&dma->dmactl) & ~BIT(DMA_ENABLE), &dma->dmactl); |
1da177e4 LT |
788 | spin_stop_dma (dma); |
789 | } | |
790 | ||
791 | static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma) | |
792 | { | |
793 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
3e76fdcb | 794 | unsigned int tmp = BIT(VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
1da177e4 | 795 | |
950ee4c8 | 796 | if (ep->dev->pdev->device != 0x2280) |
3e76fdcb | 797 | tmp |= BIT(END_OF_CHAIN); |
950ee4c8 GL |
798 | |
799 | writel (tmp, &dma->dmacount); | |
1da177e4 LT |
800 | writel (readl (&dma->dmastat), &dma->dmastat); |
801 | ||
802 | writel (td_dma, &dma->dmadesc); | |
c2db8a8a | 803 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
3e76fdcb | 804 | dmactl |= BIT(DMA_REQUEST_OUTSTANDING); |
1da177e4 LT |
805 | writel (dmactl, &dma->dmactl); |
806 | ||
807 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ | |
808 | (void) readl (&ep->dev->pci->pcimstctl); | |
809 | ||
3e76fdcb | 810 | writel(BIT(DMA_START), &dma->dmastat); |
1da177e4 LT |
811 | |
812 | if (!ep->is_in) | |
813 | stop_out_naking (ep); | |
814 | } | |
815 | ||
816 | static void start_dma (struct net2280_ep *ep, struct net2280_request *req) | |
817 | { | |
818 | u32 tmp; | |
819 | struct net2280_dma_regs __iomem *dma = ep->dma; | |
820 | ||
821 | /* FIXME can't use DMA for ZLPs */ | |
822 | ||
823 | /* on this path we "know" there's no dma active (yet) */ | |
3e76fdcb | 824 | WARN_ON(readl(&dma->dmactl) & BIT(DMA_ENABLE)); |
1da177e4 LT |
825 | writel (0, &ep->dma->dmactl); |
826 | ||
827 | /* previous OUT packet might have been short */ | |
828 | if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat)) | |
3e76fdcb RR |
829 | & BIT(NAK_OUT_PACKETS)) != 0) { |
830 | writel(BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT), | |
1da177e4 LT |
831 | &ep->regs->ep_stat); |
832 | ||
833 | tmp = readl (&ep->regs->ep_avail); | |
834 | if (tmp) { | |
835 | writel (readl (&dma->dmastat), &dma->dmastat); | |
836 | ||
837 | /* transfer all/some fifo data */ | |
838 | writel (req->req.dma, &dma->dmaaddr); | |
839 | tmp = min (tmp, req->req.length); | |
840 | ||
841 | /* dma irq, faking scatterlist status */ | |
842 | req->td->dmacount = cpu_to_le32 (req->req.length - tmp); | |
3e76fdcb | 843 | writel(BIT(DMA_DONE_INTERRUPT_ENABLE) |
1da177e4 LT |
844 | | tmp, &dma->dmacount); |
845 | req->td->dmadesc = 0; | |
846 | req->valid = 1; | |
847 | ||
3e76fdcb RR |
848 | writel(BIT(DMA_ENABLE), &dma->dmactl); |
849 | writel(BIT(DMA_START), &dma->dmastat); | |
1da177e4 LT |
850 | return; |
851 | } | |
852 | } | |
853 | ||
854 | tmp = dmactl_default; | |
855 | ||
856 | /* force packet boundaries between dma requests, but prevent the | |
857 | * controller from automagically writing a last "short" packet | |
858 | * (zero length) unless the driver explicitly said to do that. | |
859 | */ | |
860 | if (ep->is_in) { | |
861 | if (likely ((req->req.length % ep->ep.maxpacket) != 0 | |
862 | || req->req.zero)) { | |
3e76fdcb | 863 | tmp |= BIT(DMA_FIFO_VALIDATE); |
1da177e4 LT |
864 | ep->in_fifo_validate = 1; |
865 | } else | |
866 | ep->in_fifo_validate = 0; | |
867 | } | |
868 | ||
869 | /* init req->td, pointing to the current dummy */ | |
870 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); | |
871 | fill_dma_desc (ep, req, 1); | |
872 | ||
873 | if (!use_dma_chaining) | |
3e76fdcb | 874 | req->td->dmacount |= cpu_to_le32(BIT(END_OF_CHAIN)); |
1da177e4 LT |
875 | |
876 | start_queue (ep, tmp, req->td_dma); | |
877 | } | |
878 | ||
adc82f77 RR |
879 | static inline void resume_dma(struct net2280_ep *ep) |
880 | { | |
3e76fdcb | 881 | writel(readl(&ep->dma->dmactl) | BIT(DMA_ENABLE), &ep->dma->dmactl); |
adc82f77 RR |
882 | |
883 | ep->dma_started = true; | |
884 | } | |
885 | ||
886 | static inline void ep_stop_dma(struct net2280_ep *ep) | |
887 | { | |
3e76fdcb | 888 | writel(readl(&ep->dma->dmactl) & ~BIT(DMA_ENABLE), &ep->dma->dmactl); |
adc82f77 RR |
889 | spin_stop_dma(ep->dma); |
890 | ||
891 | ep->dma_started = false; | |
892 | } | |
893 | ||
1da177e4 LT |
894 | static inline void |
895 | queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid) | |
896 | { | |
897 | struct net2280_dma *end; | |
898 | dma_addr_t tmp; | |
899 | ||
900 | /* swap new dummy for old, link; fill and maybe activate */ | |
901 | end = ep->dummy; | |
902 | ep->dummy = req->td; | |
903 | req->td = end; | |
904 | ||
905 | tmp = ep->td_dma; | |
906 | ep->td_dma = req->td_dma; | |
907 | req->td_dma = tmp; | |
908 | ||
909 | end->dmadesc = cpu_to_le32 (ep->td_dma); | |
910 | ||
911 | fill_dma_desc (ep, req, valid); | |
912 | } | |
913 | ||
914 | static void | |
915 | done (struct net2280_ep *ep, struct net2280_request *req, int status) | |
916 | { | |
917 | struct net2280 *dev; | |
918 | unsigned stopped = ep->stopped; | |
919 | ||
920 | list_del_init (&req->queue); | |
921 | ||
922 | if (req->req.status == -EINPROGRESS) | |
923 | req->req.status = status; | |
924 | else | |
925 | status = req->req.status; | |
926 | ||
927 | dev = ep->dev; | |
ae4d7933 FB |
928 | if (ep->dma) |
929 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->is_in); | |
1da177e4 LT |
930 | |
931 | if (status && status != -ESHUTDOWN) | |
932 | VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n", | |
933 | ep->ep.name, &req->req, status, | |
934 | req->req.actual, req->req.length); | |
935 | ||
936 | /* don't modify queue heads during completion callback */ | |
937 | ep->stopped = 1; | |
938 | spin_unlock (&dev->lock); | |
939 | req->req.complete (&ep->ep, &req->req); | |
940 | spin_lock (&dev->lock); | |
941 | ep->stopped = stopped; | |
942 | } | |
943 | ||
944 | /*-------------------------------------------------------------------------*/ | |
945 | ||
946 | static int | |
55016f10 | 947 | net2280_queue (struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
1da177e4 LT |
948 | { |
949 | struct net2280_request *req; | |
950 | struct net2280_ep *ep; | |
951 | struct net2280 *dev; | |
952 | unsigned long flags; | |
953 | ||
954 | /* we always require a cpu-view buffer, so that we can | |
955 | * always use pio (as fallback or whatever). | |
956 | */ | |
957 | req = container_of (_req, struct net2280_request, req); | |
958 | if (!_req || !_req->complete || !_req->buf | |
959 | || !list_empty (&req->queue)) | |
960 | return -EINVAL; | |
961 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) | |
962 | return -EDOM; | |
963 | ep = container_of (_ep, struct net2280_ep, ep); | |
964 | if (!_ep || (!ep->desc && ep->num != 0)) | |
965 | return -EINVAL; | |
966 | dev = ep->dev; | |
967 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
968 | return -ESHUTDOWN; | |
969 | ||
970 | /* FIXME implement PIO fallback for ZLPs with DMA */ | |
971 | if (ep->dma && _req->length == 0) | |
972 | return -EOPNOTSUPP; | |
973 | ||
974 | /* set up dma mapping in case the caller didn't */ | |
ae4d7933 FB |
975 | if (ep->dma) { |
976 | int ret; | |
977 | ||
978 | ret = usb_gadget_map_request(&dev->gadget, _req, | |
979 | ep->is_in); | |
980 | if (ret) | |
981 | return ret; | |
1da177e4 LT |
982 | } |
983 | ||
984 | #if 0 | |
985 | VDEBUG (dev, "%s queue req %p, len %d buf %p\n", | |
986 | _ep->name, _req, _req->length, _req->buf); | |
987 | #endif | |
988 | ||
989 | spin_lock_irqsave (&dev->lock, flags); | |
990 | ||
991 | _req->status = -EINPROGRESS; | |
992 | _req->actual = 0; | |
993 | ||
994 | /* kickstart this i/o queue? */ | |
995 | if (list_empty (&ep->queue) && !ep->stopped) { | |
adc82f77 RR |
996 | /* DMA request while EP halted */ |
997 | if (ep->dma && | |
3e76fdcb | 998 | (readl(&ep->regs->ep_rsp) & BIT(CLEAR_ENDPOINT_HALT)) && |
c2db8a8a | 999 | (dev->pdev->vendor == PCI_VENDOR_ID_PLX)) { |
adc82f77 RR |
1000 | int valid = 1; |
1001 | if (ep->is_in) { | |
1002 | int expect; | |
1003 | expect = likely(req->req.zero || | |
1004 | ((req->req.length % | |
1005 | ep->ep.maxpacket) != 0)); | |
1006 | if (expect != ep->in_fifo_validate) | |
1007 | valid = 0; | |
1008 | } | |
1009 | queue_dma(ep, req, valid); | |
1010 | } | |
1da177e4 | 1011 | /* use DMA if the endpoint supports it, else pio */ |
adc82f77 | 1012 | else if (ep->dma) |
1da177e4 LT |
1013 | start_dma (ep, req); |
1014 | else { | |
1015 | /* maybe there's no control data, just status ack */ | |
1016 | if (ep->num == 0 && _req->length == 0) { | |
1017 | allow_status (ep); | |
1018 | done (ep, req, 0); | |
1019 | VDEBUG (dev, "%s status ack\n", ep->ep.name); | |
1020 | goto done; | |
1021 | } | |
1022 | ||
1023 | /* PIO ... stuff the fifo, or unblock it. */ | |
1024 | if (ep->is_in) | |
1025 | write_fifo (ep, _req); | |
1026 | else if (list_empty (&ep->queue)) { | |
1027 | u32 s; | |
1028 | ||
1029 | /* OUT FIFO might have packet(s) buffered */ | |
1030 | s = readl (&ep->regs->ep_stat); | |
3e76fdcb | 1031 | if ((s & BIT(FIFO_EMPTY)) == 0) { |
1da177e4 LT |
1032 | /* note: _req->short_not_ok is |
1033 | * ignored here since PIO _always_ | |
1034 | * stops queue advance here, and | |
1035 | * _req->status doesn't change for | |
1036 | * short reads (only _req->actual) | |
1037 | */ | |
1038 | if (read_fifo (ep, req)) { | |
1039 | done (ep, req, 0); | |
1040 | if (ep->num == 0) | |
1041 | allow_status (ep); | |
1042 | /* don't queue it */ | |
1043 | req = NULL; | |
1044 | } else | |
1045 | s = readl (&ep->regs->ep_stat); | |
1046 | } | |
1047 | ||
1048 | /* don't NAK, let the fifo fill */ | |
3e76fdcb RR |
1049 | if (req && (s & BIT(NAK_OUT_PACKETS))) |
1050 | writel(BIT(CLEAR_NAK_OUT_PACKETS), | |
1da177e4 LT |
1051 | &ep->regs->ep_rsp); |
1052 | } | |
1053 | } | |
1054 | ||
1055 | } else if (ep->dma) { | |
1056 | int valid = 1; | |
1057 | ||
1058 | if (ep->is_in) { | |
1059 | int expect; | |
1060 | ||
1061 | /* preventing magic zlps is per-engine state, not | |
1062 | * per-transfer; irq logic must recover hiccups. | |
1063 | */ | |
1064 | expect = likely (req->req.zero | |
1065 | || (req->req.length % ep->ep.maxpacket) != 0); | |
1066 | if (expect != ep->in_fifo_validate) | |
1067 | valid = 0; | |
1068 | } | |
1069 | queue_dma (ep, req, valid); | |
1070 | ||
1071 | } /* else the irq handler advances the queue. */ | |
1072 | ||
1f26e28d | 1073 | ep->responded = 1; |
1da177e4 LT |
1074 | if (req) |
1075 | list_add_tail (&req->queue, &ep->queue); | |
1076 | done: | |
1077 | spin_unlock_irqrestore (&dev->lock, flags); | |
1078 | ||
1079 | /* pci writes may still be posted */ | |
1080 | return 0; | |
1081 | } | |
1082 | ||
1083 | static inline void | |
1084 | dma_done ( | |
1085 | struct net2280_ep *ep, | |
1086 | struct net2280_request *req, | |
1087 | u32 dmacount, | |
1088 | int status | |
1089 | ) | |
1090 | { | |
1091 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); | |
1092 | done (ep, req, status); | |
1093 | } | |
1094 | ||
1095 | static void restart_dma (struct net2280_ep *ep); | |
1096 | ||
1097 | static void scan_dma_completions (struct net2280_ep *ep) | |
1098 | { | |
1099 | /* only look at descriptors that were "naturally" retired, | |
1100 | * so fifo and list head state won't matter | |
1101 | */ | |
1102 | while (!list_empty (&ep->queue)) { | |
1103 | struct net2280_request *req; | |
1104 | u32 tmp; | |
1105 | ||
1106 | req = list_entry (ep->queue.next, | |
1107 | struct net2280_request, queue); | |
1108 | if (!req->valid) | |
1109 | break; | |
1110 | rmb (); | |
1111 | tmp = le32_to_cpup (&req->td->dmacount); | |
3e76fdcb | 1112 | if ((tmp & BIT(VALID_BIT)) != 0) |
1da177e4 LT |
1113 | break; |
1114 | ||
1115 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" | |
1116 | * cases where DMA must be aborted; this code handles | |
1117 | * all non-abort DMA completions. | |
1118 | */ | |
1119 | if (unlikely (req->td->dmadesc == 0)) { | |
1120 | /* paranoia */ | |
1121 | tmp = readl (&ep->dma->dmacount); | |
1122 | if (tmp & DMA_BYTE_COUNT_MASK) | |
1123 | break; | |
1124 | /* single transfer mode */ | |
1125 | dma_done (ep, req, tmp, 0); | |
1126 | break; | |
1127 | } else if (!ep->is_in | |
1128 | && (req->req.length % ep->ep.maxpacket) != 0) { | |
1129 | tmp = readl (&ep->regs->ep_stat); | |
c2db8a8a | 1130 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 | 1131 | return dma_done(ep, req, tmp, 0); |
1da177e4 LT |
1132 | |
1133 | /* AVOID TROUBLE HERE by not issuing short reads from | |
1134 | * your gadget driver. That helps avoids errata 0121, | |
1135 | * 0122, and 0124; not all cases trigger the warning. | |
1136 | */ | |
3e76fdcb | 1137 | if ((tmp & BIT(NAK_OUT_PACKETS)) == 0) { |
b6c63937 | 1138 | WARNING (ep->dev, "%s lost packet sync!\n", |
1da177e4 LT |
1139 | ep->ep.name); |
1140 | req->req.status = -EOVERFLOW; | |
1141 | } else if ((tmp = readl (&ep->regs->ep_avail)) != 0) { | |
1142 | /* fifo gets flushed later */ | |
1143 | ep->out_overflow = 1; | |
1144 | DEBUG (ep->dev, "%s dma, discard %d len %d\n", | |
1145 | ep->ep.name, tmp, | |
1146 | req->req.length); | |
1147 | req->req.status = -EOVERFLOW; | |
1148 | } | |
1149 | } | |
1150 | dma_done (ep, req, tmp, 0); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static void restart_dma (struct net2280_ep *ep) | |
1155 | { | |
1156 | struct net2280_request *req; | |
1157 | u32 dmactl = dmactl_default; | |
1158 | ||
1159 | if (ep->stopped) | |
1160 | return; | |
1161 | req = list_entry (ep->queue.next, struct net2280_request, queue); | |
1162 | ||
1163 | if (!use_dma_chaining) { | |
1164 | start_dma (ep, req); | |
1165 | return; | |
1166 | } | |
1167 | ||
1168 | /* the 2280 will be processing the queue unless queue hiccups after | |
1169 | * the previous transfer: | |
1170 | * IN: wanted automagic zlp, head doesn't (or vice versa) | |
1171 | * DMA_FIFO_VALIDATE doesn't init from dma descriptors. | |
1172 | * OUT: was "usb-short", we must restart. | |
1173 | */ | |
1174 | if (ep->is_in && !req->valid) { | |
1175 | struct net2280_request *entry, *prev = NULL; | |
1176 | int reqmode, done = 0; | |
1177 | ||
1178 | DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td); | |
1179 | ep->in_fifo_validate = likely (req->req.zero | |
1180 | || (req->req.length % ep->ep.maxpacket) != 0); | |
1181 | if (ep->in_fifo_validate) | |
3e76fdcb | 1182 | dmactl |= BIT(DMA_FIFO_VALIDATE); |
1da177e4 | 1183 | list_for_each_entry (entry, &ep->queue, queue) { |
320f3459 | 1184 | __le32 dmacount; |
1da177e4 LT |
1185 | |
1186 | if (entry == req) | |
1187 | continue; | |
1188 | dmacount = entry->td->dmacount; | |
1189 | if (!done) { | |
1190 | reqmode = likely (entry->req.zero | |
1191 | || (entry->req.length | |
1192 | % ep->ep.maxpacket) != 0); | |
1193 | if (reqmode == ep->in_fifo_validate) { | |
1194 | entry->valid = 1; | |
1195 | dmacount |= valid_bit; | |
1196 | entry->td->dmacount = dmacount; | |
1197 | prev = entry; | |
1198 | continue; | |
1199 | } else { | |
1200 | /* force a hiccup */ | |
1201 | prev->td->dmacount |= dma_done_ie; | |
1202 | done = 1; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | /* walk the rest of the queue so unlinks behave */ | |
1207 | entry->valid = 0; | |
1208 | dmacount &= ~valid_bit; | |
1209 | entry->td->dmacount = dmacount; | |
1210 | prev = entry; | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | writel (0, &ep->dma->dmactl); | |
1215 | start_queue (ep, dmactl, req->td_dma); | |
1216 | } | |
1217 | ||
adc82f77 | 1218 | static void abort_dma_228x(struct net2280_ep *ep) |
1da177e4 LT |
1219 | { |
1220 | /* abort the current transfer */ | |
1221 | if (likely (!list_empty (&ep->queue))) { | |
1222 | /* FIXME work around errata 0121, 0122, 0124 */ | |
3e76fdcb | 1223 | writel(BIT(DMA_ABORT), &ep->dma->dmastat); |
1da177e4 LT |
1224 | spin_stop_dma (ep->dma); |
1225 | } else | |
1226 | stop_dma (ep->dma); | |
1227 | scan_dma_completions (ep); | |
1228 | } | |
1229 | ||
adc82f77 RR |
1230 | static void abort_dma_338x(struct net2280_ep *ep) |
1231 | { | |
3e76fdcb | 1232 | writel(BIT(DMA_ABORT), &ep->dma->dmastat); |
adc82f77 RR |
1233 | spin_stop_dma(ep->dma); |
1234 | } | |
1235 | ||
1236 | static void abort_dma(struct net2280_ep *ep) | |
1237 | { | |
c2db8a8a | 1238 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 RR |
1239 | return abort_dma_228x(ep); |
1240 | return abort_dma_338x(ep); | |
1241 | } | |
1242 | ||
1da177e4 LT |
1243 | /* dequeue ALL requests */ |
1244 | static void nuke (struct net2280_ep *ep) | |
1245 | { | |
1246 | struct net2280_request *req; | |
1247 | ||
1248 | /* called with spinlock held */ | |
1249 | ep->stopped = 1; | |
1250 | if (ep->dma) | |
1251 | abort_dma (ep); | |
1252 | while (!list_empty (&ep->queue)) { | |
1253 | req = list_entry (ep->queue.next, | |
1254 | struct net2280_request, | |
1255 | queue); | |
1256 | done (ep, req, -ESHUTDOWN); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | /* dequeue JUST ONE request */ | |
1261 | static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req) | |
1262 | { | |
1263 | struct net2280_ep *ep; | |
1264 | struct net2280_request *req; | |
1265 | unsigned long flags; | |
1266 | u32 dmactl; | |
1267 | int stopped; | |
1268 | ||
1269 | ep = container_of (_ep, struct net2280_ep, ep); | |
1270 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1274 | stopped = ep->stopped; | |
1275 | ||
1276 | /* quiesce dma while we patch the queue */ | |
1277 | dmactl = 0; | |
1278 | ep->stopped = 1; | |
1279 | if (ep->dma) { | |
1280 | dmactl = readl (&ep->dma->dmactl); | |
1281 | /* WARNING erratum 0127 may kick in ... */ | |
1282 | stop_dma (ep->dma); | |
1283 | scan_dma_completions (ep); | |
1284 | } | |
1285 | ||
1286 | /* make sure it's still queued on this endpoint */ | |
1287 | list_for_each_entry (req, &ep->queue, queue) { | |
1288 | if (&req->req == _req) | |
1289 | break; | |
1290 | } | |
1291 | if (&req->req != _req) { | |
1292 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | ||
1296 | /* queue head may be partially complete. */ | |
1297 | if (ep->queue.next == &req->queue) { | |
1298 | if (ep->dma) { | |
1299 | DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name); | |
1300 | _req->status = -ECONNRESET; | |
1301 | abort_dma (ep); | |
1302 | if (likely (ep->queue.next == &req->queue)) { | |
1303 | // NOTE: misreports single-transfer mode | |
1304 | req->td->dmacount = 0; /* invalidate */ | |
1305 | dma_done (ep, req, | |
1306 | readl (&ep->dma->dmacount), | |
1307 | -ECONNRESET); | |
1308 | } | |
1309 | } else { | |
1310 | DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name); | |
1311 | done (ep, req, -ECONNRESET); | |
1312 | } | |
1313 | req = NULL; | |
1314 | ||
1315 | /* patch up hardware chaining data */ | |
1316 | } else if (ep->dma && use_dma_chaining) { | |
1317 | if (req->queue.prev == ep->queue.next) { | |
1318 | writel (le32_to_cpu (req->td->dmadesc), | |
1319 | &ep->dma->dmadesc); | |
1320 | if (req->td->dmacount & dma_done_ie) | |
1321 | writel (readl (&ep->dma->dmacount) | |
320f3459 | 1322 | | le32_to_cpu(dma_done_ie), |
1da177e4 LT |
1323 | &ep->dma->dmacount); |
1324 | } else { | |
1325 | struct net2280_request *prev; | |
1326 | ||
1327 | prev = list_entry (req->queue.prev, | |
1328 | struct net2280_request, queue); | |
1329 | prev->td->dmadesc = req->td->dmadesc; | |
1330 | if (req->td->dmacount & dma_done_ie) | |
1331 | prev->td->dmacount |= dma_done_ie; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | if (req) | |
1336 | done (ep, req, -ECONNRESET); | |
1337 | ep->stopped = stopped; | |
1338 | ||
1339 | if (ep->dma) { | |
1340 | /* turn off dma on inactive queues */ | |
1341 | if (list_empty (&ep->queue)) | |
1342 | stop_dma (ep->dma); | |
1343 | else if (!ep->stopped) { | |
1344 | /* resume current request, or start new one */ | |
1345 | if (req) | |
1346 | writel (dmactl, &ep->dma->dmactl); | |
1347 | else | |
1348 | start_dma (ep, list_entry (ep->queue.next, | |
1349 | struct net2280_request, queue)); | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | /*-------------------------------------------------------------------------*/ | |
1358 | ||
1359 | static int net2280_fifo_status (struct usb_ep *_ep); | |
1360 | ||
1361 | static int | |
8066134f | 1362 | net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
1da177e4 LT |
1363 | { |
1364 | struct net2280_ep *ep; | |
1365 | unsigned long flags; | |
1366 | int retval = 0; | |
1367 | ||
1368 | ep = container_of (_ep, struct net2280_ep, ep); | |
1369 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1370 | return -EINVAL; | |
1371 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1372 | return -ESHUTDOWN; | |
1373 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) | |
1374 | == USB_ENDPOINT_XFER_ISOC) | |
1375 | return -EINVAL; | |
1376 | ||
1377 | spin_lock_irqsave (&ep->dev->lock, flags); | |
1378 | if (!list_empty (&ep->queue)) | |
1379 | retval = -EAGAIN; | |
1380 | else if (ep->is_in && value && net2280_fifo_status (_ep) != 0) | |
1381 | retval = -EAGAIN; | |
1382 | else { | |
8066134f AS |
1383 | VDEBUG (ep->dev, "%s %s %s\n", _ep->name, |
1384 | value ? "set" : "clear", | |
1385 | wedged ? "wedge" : "halt"); | |
1da177e4 LT |
1386 | /* set/clear, then synch memory views with the device */ |
1387 | if (value) { | |
1388 | if (ep->num == 0) | |
1389 | ep->dev->protocol_stall = 1; | |
1390 | else | |
1391 | set_halt (ep); | |
8066134f AS |
1392 | if (wedged) |
1393 | ep->wedged = 1; | |
1394 | } else { | |
1da177e4 | 1395 | clear_halt (ep); |
c2db8a8a | 1396 | if (ep->dev->pdev->vendor == PCI_VENDOR_ID_PLX && |
adc82f77 RR |
1397 | !list_empty(&ep->queue) && ep->td_dma) |
1398 | restart_dma(ep); | |
8066134f AS |
1399 | ep->wedged = 0; |
1400 | } | |
1da177e4 LT |
1401 | (void) readl (&ep->regs->ep_rsp); |
1402 | } | |
1403 | spin_unlock_irqrestore (&ep->dev->lock, flags); | |
1404 | ||
1405 | return retval; | |
1406 | } | |
1407 | ||
8066134f AS |
1408 | static int |
1409 | net2280_set_halt(struct usb_ep *_ep, int value) | |
1410 | { | |
1411 | return net2280_set_halt_and_wedge(_ep, value, 0); | |
1412 | } | |
1413 | ||
1414 | static int | |
1415 | net2280_set_wedge(struct usb_ep *_ep) | |
1416 | { | |
1417 | if (!_ep || _ep->name == ep0name) | |
1418 | return -EINVAL; | |
1419 | return net2280_set_halt_and_wedge(_ep, 1, 1); | |
1420 | } | |
1421 | ||
1da177e4 LT |
1422 | static int |
1423 | net2280_fifo_status (struct usb_ep *_ep) | |
1424 | { | |
1425 | struct net2280_ep *ep; | |
1426 | u32 avail; | |
1427 | ||
1428 | ep = container_of (_ep, struct net2280_ep, ep); | |
1429 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1430 | return -ENODEV; | |
1431 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1432 | return -ESHUTDOWN; | |
1433 | ||
3e76fdcb | 1434 | avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1); |
1da177e4 LT |
1435 | if (avail > ep->fifo_size) |
1436 | return -EOVERFLOW; | |
1437 | if (ep->is_in) | |
1438 | avail = ep->fifo_size - avail; | |
1439 | return avail; | |
1440 | } | |
1441 | ||
1442 | static void | |
1443 | net2280_fifo_flush (struct usb_ep *_ep) | |
1444 | { | |
1445 | struct net2280_ep *ep; | |
1446 | ||
1447 | ep = container_of (_ep, struct net2280_ep, ep); | |
1448 | if (!_ep || (!ep->desc && ep->num != 0)) | |
1449 | return; | |
1450 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1451 | return; | |
1452 | ||
3e76fdcb | 1453 | writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat); |
1da177e4 LT |
1454 | (void) readl (&ep->regs->ep_rsp); |
1455 | } | |
1456 | ||
901b3d75 | 1457 | static const struct usb_ep_ops net2280_ep_ops = { |
1da177e4 LT |
1458 | .enable = net2280_enable, |
1459 | .disable = net2280_disable, | |
1460 | ||
1461 | .alloc_request = net2280_alloc_request, | |
1462 | .free_request = net2280_free_request, | |
1463 | ||
1da177e4 LT |
1464 | .queue = net2280_queue, |
1465 | .dequeue = net2280_dequeue, | |
1466 | ||
1467 | .set_halt = net2280_set_halt, | |
8066134f | 1468 | .set_wedge = net2280_set_wedge, |
1da177e4 LT |
1469 | .fifo_status = net2280_fifo_status, |
1470 | .fifo_flush = net2280_fifo_flush, | |
1471 | }; | |
1472 | ||
1473 | /*-------------------------------------------------------------------------*/ | |
1474 | ||
1475 | static int net2280_get_frame (struct usb_gadget *_gadget) | |
1476 | { | |
1477 | struct net2280 *dev; | |
1478 | unsigned long flags; | |
1479 | u16 retval; | |
1480 | ||
1481 | if (!_gadget) | |
1482 | return -ENODEV; | |
1483 | dev = container_of (_gadget, struct net2280, gadget); | |
1484 | spin_lock_irqsave (&dev->lock, flags); | |
1485 | retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff; | |
1486 | spin_unlock_irqrestore (&dev->lock, flags); | |
1487 | return retval; | |
1488 | } | |
1489 | ||
1490 | static int net2280_wakeup (struct usb_gadget *_gadget) | |
1491 | { | |
1492 | struct net2280 *dev; | |
1493 | u32 tmp; | |
1494 | unsigned long flags; | |
1495 | ||
1496 | if (!_gadget) | |
1497 | return 0; | |
1498 | dev = container_of (_gadget, struct net2280, gadget); | |
1499 | ||
1500 | spin_lock_irqsave (&dev->lock, flags); | |
1501 | tmp = readl (&dev->usb->usbctl); | |
3e76fdcb RR |
1502 | if (tmp & BIT(DEVICE_REMOTE_WAKEUP_ENABLE)) |
1503 | writel(BIT(GENERATE_RESUME), &dev->usb->usbstat); | |
1da177e4 LT |
1504 | spin_unlock_irqrestore (&dev->lock, flags); |
1505 | ||
1506 | /* pci writes may still be posted */ | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value) | |
1511 | { | |
1512 | struct net2280 *dev; | |
1513 | u32 tmp; | |
1514 | unsigned long flags; | |
1515 | ||
1516 | if (!_gadget) | |
1517 | return 0; | |
1518 | dev = container_of (_gadget, struct net2280, gadget); | |
1519 | ||
1520 | spin_lock_irqsave (&dev->lock, flags); | |
1521 | tmp = readl (&dev->usb->usbctl); | |
adc82f77 | 1522 | if (value) { |
3e76fdcb | 1523 | tmp |= BIT(SELF_POWERED_STATUS); |
adc82f77 RR |
1524 | dev->selfpowered = 1; |
1525 | } else { | |
3e76fdcb | 1526 | tmp &= ~BIT(SELF_POWERED_STATUS); |
adc82f77 RR |
1527 | dev->selfpowered = 0; |
1528 | } | |
1da177e4 LT |
1529 | writel (tmp, &dev->usb->usbctl); |
1530 | spin_unlock_irqrestore (&dev->lock, flags); | |
1531 | ||
1532 | return 0; | |
1533 | } | |
1534 | ||
1535 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) | |
1536 | { | |
1537 | struct net2280 *dev; | |
1538 | u32 tmp; | |
1539 | unsigned long flags; | |
1540 | ||
1541 | if (!_gadget) | |
1542 | return -ENODEV; | |
1543 | dev = container_of (_gadget, struct net2280, gadget); | |
1544 | ||
1545 | spin_lock_irqsave (&dev->lock, flags); | |
1546 | tmp = readl (&dev->usb->usbctl); | |
1547 | dev->softconnect = (is_on != 0); | |
1548 | if (is_on) | |
3e76fdcb | 1549 | tmp |= BIT(USB_DETECT_ENABLE); |
1da177e4 | 1550 | else |
3e76fdcb | 1551 | tmp &= ~BIT(USB_DETECT_ENABLE); |
1da177e4 LT |
1552 | writel (tmp, &dev->usb->usbctl); |
1553 | spin_unlock_irqrestore (&dev->lock, flags); | |
1554 | ||
1555 | return 0; | |
1556 | } | |
1557 | ||
4cf5e00b FB |
1558 | static int net2280_start(struct usb_gadget *_gadget, |
1559 | struct usb_gadget_driver *driver); | |
1560 | static int net2280_stop(struct usb_gadget *_gadget, | |
1561 | struct usb_gadget_driver *driver); | |
0f91349b | 1562 | |
1da177e4 LT |
1563 | static const struct usb_gadget_ops net2280_ops = { |
1564 | .get_frame = net2280_get_frame, | |
1565 | .wakeup = net2280_wakeup, | |
1566 | .set_selfpowered = net2280_set_selfpowered, | |
1567 | .pullup = net2280_pullup, | |
4cf5e00b FB |
1568 | .udc_start = net2280_start, |
1569 | .udc_stop = net2280_stop, | |
1da177e4 LT |
1570 | }; |
1571 | ||
1572 | /*-------------------------------------------------------------------------*/ | |
1573 | ||
1574 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
1575 | ||
1576 | /* FIXME move these into procfs, and use seq_file. | |
1577 | * Sysfs _still_ doesn't behave for arbitrarily sized files, | |
1578 | * and also doesn't help products using this with 2.4 kernels. | |
1579 | */ | |
1580 | ||
1581 | /* "function" sysfs attribute */ | |
ce26bd23 GKH |
1582 | static ssize_t function_show(struct device *_dev, struct device_attribute *attr, |
1583 | char *buf) | |
1da177e4 LT |
1584 | { |
1585 | struct net2280 *dev = dev_get_drvdata (_dev); | |
1586 | ||
1587 | if (!dev->driver | |
1588 | || !dev->driver->function | |
1589 | || strlen (dev->driver->function) > PAGE_SIZE) | |
1590 | return 0; | |
1591 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); | |
1592 | } | |
ce26bd23 | 1593 | static DEVICE_ATTR_RO(function); |
1da177e4 | 1594 | |
ce26bd23 GKH |
1595 | static ssize_t registers_show(struct device *_dev, |
1596 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
1597 | { |
1598 | struct net2280 *dev; | |
1599 | char *next; | |
1600 | unsigned size, t; | |
1601 | unsigned long flags; | |
1602 | int i; | |
1603 | u32 t1, t2; | |
30e69598 | 1604 | const char *s; |
1da177e4 LT |
1605 | |
1606 | dev = dev_get_drvdata (_dev); | |
1607 | next = buf; | |
1608 | size = PAGE_SIZE; | |
1609 | spin_lock_irqsave (&dev->lock, flags); | |
1610 | ||
1611 | if (dev->driver) | |
1612 | s = dev->driver->driver.name; | |
1613 | else | |
1614 | s = "(none)"; | |
1615 | ||
1616 | /* Main Control Registers */ | |
1617 | t = scnprintf (next, size, "%s version " DRIVER_VERSION | |
1618 | ", chiprev %04x, dma %s\n\n" | |
1619 | "devinit %03x fifoctl %08x gadget '%s'\n" | |
1620 | "pci irqenb0 %02x irqenb1 %08x " | |
1621 | "irqstat0 %04x irqstat1 %08x\n", | |
1622 | driver_name, dev->chiprev, | |
1623 | use_dma | |
1624 | ? (use_dma_chaining ? "chaining" : "enabled") | |
1625 | : "disabled", | |
1626 | readl (&dev->regs->devinit), | |
1627 | readl (&dev->regs->fifoctl), | |
1628 | s, | |
1629 | readl (&dev->regs->pciirqenb0), | |
1630 | readl (&dev->regs->pciirqenb1), | |
1631 | readl (&dev->regs->irqstat0), | |
1632 | readl (&dev->regs->irqstat1)); | |
1633 | size -= t; | |
1634 | next += t; | |
1635 | ||
1636 | /* USB Control Registers */ | |
1637 | t1 = readl (&dev->usb->usbctl); | |
1638 | t2 = readl (&dev->usb->usbstat); | |
3e76fdcb RR |
1639 | if (t1 & BIT(VBUS_PIN)) { |
1640 | if (t2 & BIT(HIGH_SPEED)) | |
1da177e4 LT |
1641 | s = "high speed"; |
1642 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1643 | s = "powered"; | |
1644 | else | |
1645 | s = "full speed"; | |
1646 | /* full speed bit (6) not working?? */ | |
1647 | } else | |
1648 | s = "not attached"; | |
1649 | t = scnprintf (next, size, | |
1650 | "stdrsp %08x usbctl %08x usbstat %08x " | |
1651 | "addr 0x%02x (%s)\n", | |
1652 | readl (&dev->usb->stdrsp), t1, t2, | |
1653 | readl (&dev->usb->ouraddr), s); | |
1654 | size -= t; | |
1655 | next += t; | |
1656 | ||
1657 | /* PCI Master Control Registers */ | |
1658 | ||
1659 | /* DMA Control Registers */ | |
1660 | ||
1661 | /* Configurable EP Control Registers */ | |
adc82f77 | 1662 | for (i = 0; i < dev->n_ep; i++) { |
1da177e4 LT |
1663 | struct net2280_ep *ep; |
1664 | ||
1665 | ep = &dev->ep [i]; | |
1666 | if (i && !ep->desc) | |
1667 | continue; | |
1668 | ||
adc82f77 | 1669 | t1 = readl(&ep->cfg->ep_cfg); |
1da177e4 LT |
1670 | t2 = readl (&ep->regs->ep_rsp) & 0xff; |
1671 | t = scnprintf (next, size, | |
1672 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" | |
1673 | "irqenb %02x\n", | |
1674 | ep->ep.name, t1, t2, | |
3e76fdcb | 1675 | (t2 & BIT(CLEAR_NAK_OUT_PACKETS)) |
1da177e4 | 1676 | ? "NAK " : "", |
3e76fdcb | 1677 | (t2 & BIT(CLEAR_EP_HIDE_STATUS_PHASE)) |
1da177e4 | 1678 | ? "hide " : "", |
3e76fdcb | 1679 | (t2 & BIT(CLEAR_EP_FORCE_CRC_ERROR)) |
1da177e4 | 1680 | ? "CRC " : "", |
3e76fdcb | 1681 | (t2 & BIT(CLEAR_INTERRUPT_MODE)) |
1da177e4 | 1682 | ? "interrupt " : "", |
3e76fdcb | 1683 | (t2 & BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) |
1da177e4 | 1684 | ? "status " : "", |
3e76fdcb | 1685 | (t2 & BIT(CLEAR_NAK_OUT_PACKETS_MODE)) |
1da177e4 | 1686 | ? "NAKmode " : "", |
3e76fdcb | 1687 | (t2 & BIT(CLEAR_ENDPOINT_TOGGLE)) |
1da177e4 | 1688 | ? "DATA1 " : "DATA0 ", |
3e76fdcb | 1689 | (t2 & BIT(CLEAR_ENDPOINT_HALT)) |
1da177e4 LT |
1690 | ? "HALT " : "", |
1691 | readl (&ep->regs->ep_irqenb)); | |
1692 | size -= t; | |
1693 | next += t; | |
1694 | ||
1695 | t = scnprintf (next, size, | |
1696 | "\tstat %08x avail %04x " | |
1697 | "(ep%d%s-%s)%s\n", | |
1698 | readl (&ep->regs->ep_stat), | |
1699 | readl (&ep->regs->ep_avail), | |
1700 | t1 & 0x0f, DIR_STRING (t1), | |
1701 | type_string (t1 >> 8), | |
1702 | ep->stopped ? "*" : ""); | |
1703 | size -= t; | |
1704 | next += t; | |
1705 | ||
1706 | if (!ep->dma) | |
1707 | continue; | |
1708 | ||
1709 | t = scnprintf (next, size, | |
1710 | " dma\tctl %08x stat %08x count %08x\n" | |
1711 | "\taddr %08x desc %08x\n", | |
1712 | readl (&ep->dma->dmactl), | |
1713 | readl (&ep->dma->dmastat), | |
1714 | readl (&ep->dma->dmacount), | |
1715 | readl (&ep->dma->dmaaddr), | |
1716 | readl (&ep->dma->dmadesc)); | |
1717 | size -= t; | |
1718 | next += t; | |
1719 | ||
1720 | } | |
1721 | ||
1722 | /* Indexed Registers */ | |
901b3d75 | 1723 | // none yet |
1da177e4 LT |
1724 | |
1725 | /* Statistics */ | |
1726 | t = scnprintf (next, size, "\nirqs: "); | |
1727 | size -= t; | |
1728 | next += t; | |
adc82f77 | 1729 | for (i = 0; i < dev->n_ep; i++) { |
1da177e4 LT |
1730 | struct net2280_ep *ep; |
1731 | ||
1732 | ep = &dev->ep [i]; | |
1733 | if (i && !ep->irqs) | |
1734 | continue; | |
1735 | t = scnprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs); | |
1736 | size -= t; | |
1737 | next += t; | |
1738 | ||
1739 | } | |
1740 | t = scnprintf (next, size, "\n"); | |
1741 | size -= t; | |
1742 | next += t; | |
1743 | ||
1744 | spin_unlock_irqrestore (&dev->lock, flags); | |
1745 | ||
1746 | return PAGE_SIZE - size; | |
1747 | } | |
ce26bd23 | 1748 | static DEVICE_ATTR_RO(registers); |
1da177e4 | 1749 | |
ce26bd23 GKH |
1750 | static ssize_t queues_show(struct device *_dev, struct device_attribute *attr, |
1751 | char *buf) | |
1da177e4 LT |
1752 | { |
1753 | struct net2280 *dev; | |
1754 | char *next; | |
1755 | unsigned size; | |
1756 | unsigned long flags; | |
1757 | int i; | |
1758 | ||
1759 | dev = dev_get_drvdata (_dev); | |
1760 | next = buf; | |
1761 | size = PAGE_SIZE; | |
1762 | spin_lock_irqsave (&dev->lock, flags); | |
1763 | ||
adc82f77 | 1764 | for (i = 0; i < dev->n_ep; i++) { |
1da177e4 LT |
1765 | struct net2280_ep *ep = &dev->ep [i]; |
1766 | struct net2280_request *req; | |
1767 | int t; | |
1768 | ||
1769 | if (i != 0) { | |
1770 | const struct usb_endpoint_descriptor *d; | |
1771 | ||
1772 | d = ep->desc; | |
1773 | if (!d) | |
1774 | continue; | |
1775 | t = d->bEndpointAddress; | |
1776 | t = scnprintf (next, size, | |
1777 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", | |
1778 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, | |
1779 | (t & USB_DIR_IN) ? "in" : "out", | |
1780 | ({ char *val; | |
1781 | switch (d->bmAttributes & 0x03) { | |
1782 | case USB_ENDPOINT_XFER_BULK: | |
901b3d75 | 1783 | val = "bulk"; break; |
1da177e4 | 1784 | case USB_ENDPOINT_XFER_INT: |
901b3d75 | 1785 | val = "intr"; break; |
1da177e4 | 1786 | default: |
901b3d75 | 1787 | val = "iso"; break; |
2b84f92b | 1788 | } val; }), |
29cc8897 | 1789 | usb_endpoint_maxp (d) & 0x1fff, |
1da177e4 LT |
1790 | ep->dma ? "dma" : "pio", ep->fifo_size |
1791 | ); | |
1792 | } else /* ep0 should only have one transfer queued */ | |
1793 | t = scnprintf (next, size, "ep0 max 64 pio %s\n", | |
1794 | ep->is_in ? "in" : "out"); | |
1795 | if (t <= 0 || t > size) | |
1796 | goto done; | |
1797 | size -= t; | |
1798 | next += t; | |
1799 | ||
1800 | if (list_empty (&ep->queue)) { | |
1801 | t = scnprintf (next, size, "\t(nothing queued)\n"); | |
1802 | if (t <= 0 || t > size) | |
1803 | goto done; | |
1804 | size -= t; | |
1805 | next += t; | |
1806 | continue; | |
1807 | } | |
1808 | list_for_each_entry (req, &ep->queue, queue) { | |
1809 | if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc)) | |
1810 | t = scnprintf (next, size, | |
1811 | "\treq %p len %d/%d " | |
1812 | "buf %p (dmacount %08x)\n", | |
1813 | &req->req, req->req.actual, | |
1814 | req->req.length, req->req.buf, | |
1815 | readl (&ep->dma->dmacount)); | |
1816 | else | |
1817 | t = scnprintf (next, size, | |
1818 | "\treq %p len %d/%d buf %p\n", | |
1819 | &req->req, req->req.actual, | |
1820 | req->req.length, req->req.buf); | |
1821 | if (t <= 0 || t > size) | |
1822 | goto done; | |
1823 | size -= t; | |
1824 | next += t; | |
1825 | ||
1826 | if (ep->dma) { | |
1827 | struct net2280_dma *td; | |
1828 | ||
1829 | td = req->td; | |
1830 | t = scnprintf (next, size, "\t td %08x " | |
1831 | " count %08x buf %08x desc %08x\n", | |
1832 | (u32) req->td_dma, | |
1833 | le32_to_cpu (td->dmacount), | |
1834 | le32_to_cpu (td->dmaaddr), | |
1835 | le32_to_cpu (td->dmadesc)); | |
1836 | if (t <= 0 || t > size) | |
1837 | goto done; | |
1838 | size -= t; | |
1839 | next += t; | |
1840 | } | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | done: | |
1845 | spin_unlock_irqrestore (&dev->lock, flags); | |
1846 | return PAGE_SIZE - size; | |
1847 | } | |
ce26bd23 | 1848 | static DEVICE_ATTR_RO(queues); |
1da177e4 LT |
1849 | |
1850 | ||
1851 | #else | |
1852 | ||
9950421c LT |
1853 | #define device_create_file(a,b) (0) |
1854 | #define device_remove_file(a,b) do { } while (0) | |
1da177e4 LT |
1855 | |
1856 | #endif | |
1857 | ||
1858 | /*-------------------------------------------------------------------------*/ | |
1859 | ||
1860 | /* another driver-specific mode might be a request type doing dma | |
1861 | * to/from another device fifo instead of to/from memory. | |
1862 | */ | |
1863 | ||
1864 | static void set_fifo_mode (struct net2280 *dev, int mode) | |
1865 | { | |
1866 | /* keeping high bits preserves BAR2 */ | |
1867 | writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); | |
1868 | ||
1869 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ | |
1870 | INIT_LIST_HEAD (&dev->gadget.ep_list); | |
1871 | list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list); | |
1872 | list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list); | |
1873 | switch (mode) { | |
1874 | case 0: | |
1875 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1876 | list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list); | |
1877 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024; | |
1878 | break; | |
1879 | case 1: | |
1880 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048; | |
1881 | break; | |
1882 | case 2: | |
1883 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); | |
1884 | dev->ep [1].fifo_size = 2048; | |
1885 | dev->ep [2].fifo_size = 1024; | |
1886 | break; | |
1887 | } | |
1888 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ | |
1889 | list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list); | |
1890 | list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list); | |
1891 | } | |
1892 | ||
adc82f77 RR |
1893 | static void defect7374_disable_data_eps(struct net2280 *dev) |
1894 | { | |
1895 | /* | |
1896 | * For Defect 7374, disable data EPs (and more): | |
1897 | * - This phase undoes the earlier phase of the Defect 7374 workaround, | |
1898 | * returing ep regs back to normal. | |
1899 | */ | |
1900 | struct net2280_ep *ep; | |
1901 | int i; | |
1902 | unsigned char ep_sel; | |
1903 | u32 tmp_reg; | |
1904 | ||
1905 | for (i = 1; i < 5; i++) { | |
1906 | ep = &dev->ep[i]; | |
1907 | writel(0, &ep->cfg->ep_cfg); | |
1908 | } | |
1909 | ||
1910 | /* CSROUT, CSRIN, PCIOUT, PCIIN, STATIN, RCIN */ | |
1911 | for (i = 0; i < 6; i++) | |
1912 | writel(0, &dev->dep[i].dep_cfg); | |
1913 | ||
1914 | for (ep_sel = 0; ep_sel <= 21; ep_sel++) { | |
1915 | /* Select an endpoint for subsequent operations: */ | |
1916 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
1917 | writel(((tmp_reg & ~0x1f) | ep_sel), &dev->plregs->pl_ep_ctrl); | |
1918 | ||
1919 | if (ep_sel < 2 || (ep_sel > 9 && ep_sel < 14) || | |
1920 | ep_sel == 18 || ep_sel == 20) | |
1921 | continue; | |
1922 | ||
1923 | /* Change settings on some selected endpoints */ | |
1924 | tmp_reg = readl(&dev->plregs->pl_ep_cfg_4); | |
3e76fdcb | 1925 | tmp_reg &= ~BIT(NON_CTRL_IN_TOLERATE_BAD_DIR); |
adc82f77 RR |
1926 | writel(tmp_reg, &dev->plregs->pl_ep_cfg_4); |
1927 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
3e76fdcb | 1928 | tmp_reg |= BIT(EP_INITIALIZED); |
adc82f77 RR |
1929 | writel(tmp_reg, &dev->plregs->pl_ep_ctrl); |
1930 | } | |
1931 | } | |
1932 | ||
1933 | static void defect7374_enable_data_eps_zero(struct net2280 *dev) | |
1934 | { | |
1935 | u32 tmp = 0, tmp_reg; | |
1936 | u32 fsmvalue, scratch; | |
1937 | int i; | |
1938 | unsigned char ep_sel; | |
1939 | ||
1940 | scratch = get_idx_reg(dev->regs, SCRATCH); | |
1941 | fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); | |
1942 | scratch &= ~(0xf << DEFECT7374_FSM_FIELD); | |
1943 | ||
1944 | /*See if firmware needs to set up for workaround*/ | |
1945 | if (fsmvalue != DEFECT7374_FSM_SS_CONTROL_READ) { | |
1946 | WARNING(dev, "Operate Defect 7374 workaround soft this time"); | |
1947 | WARNING(dev, "It will operate on cold-reboot and SS connect"); | |
1948 | ||
1949 | /*GPEPs:*/ | |
3e76fdcb | 1950 | tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_DIRECTION) | |
adc82f77 RR |
1951 | (2 << OUT_ENDPOINT_TYPE) | (2 << IN_ENDPOINT_TYPE) | |
1952 | ((dev->enhanced_mode) ? | |
3e76fdcb RR |
1953 | BIT(OUT_ENDPOINT_ENABLE) : BIT(ENDPOINT_ENABLE)) | |
1954 | BIT(IN_ENDPOINT_ENABLE)); | |
adc82f77 RR |
1955 | |
1956 | for (i = 1; i < 5; i++) | |
1957 | writel(tmp, &dev->ep[i].cfg->ep_cfg); | |
1958 | ||
1959 | /* CSRIN, PCIIN, STATIN, RCIN*/ | |
3e76fdcb | 1960 | tmp = ((0 << ENDPOINT_NUMBER) | BIT(ENDPOINT_ENABLE)); |
adc82f77 RR |
1961 | writel(tmp, &dev->dep[1].dep_cfg); |
1962 | writel(tmp, &dev->dep[3].dep_cfg); | |
1963 | writel(tmp, &dev->dep[4].dep_cfg); | |
1964 | writel(tmp, &dev->dep[5].dep_cfg); | |
1965 | ||
1966 | /*Implemented for development and debug. | |
1967 | * Can be refined/tuned later.*/ | |
1968 | for (ep_sel = 0; ep_sel <= 21; ep_sel++) { | |
1969 | /* Select an endpoint for subsequent operations: */ | |
1970 | tmp_reg = readl(&dev->plregs->pl_ep_ctrl); | |
1971 | writel(((tmp_reg & ~0x1f) | ep_sel), | |
1972 | &dev->plregs->pl_ep_ctrl); | |
1973 | ||
1974 | if (ep_sel == 1) { | |
1975 | tmp = | |
1976 | (readl(&dev->plregs->pl_ep_ctrl) | | |
3e76fdcb | 1977 | BIT(CLEAR_ACK_ERROR_CODE) | 0); |
adc82f77 RR |
1978 | writel(tmp, &dev->plregs->pl_ep_ctrl); |
1979 | continue; | |
1980 | } | |
1981 | ||
1982 | if (ep_sel == 0 || (ep_sel > 9 && ep_sel < 14) || | |
1983 | ep_sel == 18 || ep_sel == 20) | |
1984 | continue; | |
1985 | ||
1986 | tmp = (readl(&dev->plregs->pl_ep_cfg_4) | | |
3e76fdcb | 1987 | BIT(NON_CTRL_IN_TOLERATE_BAD_DIR) | 0); |
adc82f77 RR |
1988 | writel(tmp, &dev->plregs->pl_ep_cfg_4); |
1989 | ||
1990 | tmp = readl(&dev->plregs->pl_ep_ctrl) & | |
3e76fdcb | 1991 | ~BIT(EP_INITIALIZED); |
adc82f77 RR |
1992 | writel(tmp, &dev->plregs->pl_ep_ctrl); |
1993 | ||
1994 | } | |
1995 | ||
1996 | /* Set FSM to focus on the first Control Read: | |
1997 | * - Tip: Connection speed is known upon the first | |
1998 | * setup request.*/ | |
1999 | scratch |= DEFECT7374_FSM_WAITING_FOR_CONTROL_READ; | |
2000 | set_idx_reg(dev->regs, SCRATCH, scratch); | |
2001 | ||
2002 | } else{ | |
2003 | WARNING(dev, "Defect 7374 workaround soft will NOT operate"); | |
2004 | WARNING(dev, "It will operate on cold-reboot and SS connect"); | |
2005 | } | |
2006 | } | |
2007 | ||
1da177e4 LT |
2008 | /* keeping it simple: |
2009 | * - one bus driver, initted first; | |
2010 | * - one function driver, initted second | |
2011 | * | |
2012 | * most of the work to support multiple net2280 controllers would | |
2013 | * be to associate this gadget driver (yes?) with all of them, or | |
2014 | * perhaps to bind specific drivers to specific devices. | |
2015 | */ | |
2016 | ||
adc82f77 | 2017 | static void usb_reset_228x(struct net2280 *dev) |
1da177e4 LT |
2018 | { |
2019 | u32 tmp; | |
2020 | ||
2021 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
2022 | (void) readl (&dev->usb->usbctl); | |
2023 | ||
2024 | net2280_led_init (dev); | |
2025 | ||
2026 | /* disable automatic responses, and irqs */ | |
2027 | writel (0, &dev->usb->stdrsp); | |
2028 | writel (0, &dev->regs->pciirqenb0); | |
2029 | writel (0, &dev->regs->pciirqenb1); | |
2030 | ||
2031 | /* clear old dma and irq state */ | |
2032 | for (tmp = 0; tmp < 4; tmp++) { | |
adc82f77 | 2033 | struct net2280_ep *ep = &dev->ep[tmp + 1]; |
1da177e4 | 2034 | if (ep->dma) |
adc82f77 | 2035 | abort_dma(ep); |
1da177e4 | 2036 | } |
adc82f77 | 2037 | |
1da177e4 | 2038 | writel (~0, &dev->regs->irqstat0), |
3e76fdcb | 2039 | writel(~(u32)BIT(SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), |
1da177e4 LT |
2040 | |
2041 | /* reset, and enable pci */ | |
3e76fdcb RR |
2042 | tmp = readl(&dev->regs->devinit) | |
2043 | BIT(PCI_ENABLE) | | |
2044 | BIT(FIFO_SOFT_RESET) | | |
2045 | BIT(USB_SOFT_RESET) | | |
2046 | BIT(M8051_RESET); | |
1da177e4 LT |
2047 | writel (tmp, &dev->regs->devinit); |
2048 | ||
2049 | /* standard fifo and endpoint allocations */ | |
2050 | set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0); | |
2051 | } | |
2052 | ||
adc82f77 RR |
2053 | static void usb_reset_338x(struct net2280 *dev) |
2054 | { | |
2055 | u32 tmp; | |
2056 | u32 fsmvalue; | |
2057 | ||
2058 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
2059 | (void)readl(&dev->usb->usbctl); | |
2060 | ||
2061 | net2280_led_init(dev); | |
2062 | ||
2063 | fsmvalue = get_idx_reg(dev->regs, SCRATCH) & | |
2064 | (0xf << DEFECT7374_FSM_FIELD); | |
2065 | ||
2066 | /* See if firmware needs to set up for workaround: */ | |
2067 | if (fsmvalue != DEFECT7374_FSM_SS_CONTROL_READ) { | |
2068 | INFO(dev, "%s: Defect 7374 FsmValue 0x%08x\n", __func__, | |
2069 | fsmvalue); | |
2070 | } else { | |
2071 | /* disable automatic responses, and irqs */ | |
2072 | writel(0, &dev->usb->stdrsp); | |
2073 | writel(0, &dev->regs->pciirqenb0); | |
2074 | writel(0, &dev->regs->pciirqenb1); | |
2075 | } | |
2076 | ||
2077 | /* clear old dma and irq state */ | |
2078 | for (tmp = 0; tmp < 4; tmp++) { | |
2079 | struct net2280_ep *ep = &dev->ep[tmp + 1]; | |
2080 | ||
2081 | if (ep->dma) | |
2082 | abort_dma(ep); | |
2083 | } | |
2084 | ||
2085 | writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1); | |
2086 | ||
2087 | if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) { | |
2088 | /* reset, and enable pci */ | |
2089 | tmp = readl(&dev->regs->devinit) | | |
3e76fdcb RR |
2090 | BIT(PCI_ENABLE) | |
2091 | BIT(FIFO_SOFT_RESET) | | |
2092 | BIT(USB_SOFT_RESET) | | |
2093 | BIT(M8051_RESET); | |
adc82f77 RR |
2094 | |
2095 | writel(tmp, &dev->regs->devinit); | |
2096 | } | |
2097 | ||
2098 | /* always ep-{1,2,3,4} ... maybe not ep-3 or ep-4 */ | |
2099 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
2100 | ||
2101 | for (tmp = 1; tmp < dev->n_ep; tmp++) | |
2102 | list_add_tail(&dev->ep[tmp].ep.ep_list, &dev->gadget.ep_list); | |
2103 | ||
2104 | } | |
2105 | ||
2106 | static void usb_reset(struct net2280 *dev) | |
2107 | { | |
c2db8a8a | 2108 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 RR |
2109 | return usb_reset_228x(dev); |
2110 | return usb_reset_338x(dev); | |
2111 | } | |
2112 | ||
2113 | static void usb_reinit_228x(struct net2280 *dev) | |
1da177e4 LT |
2114 | { |
2115 | u32 tmp; | |
2116 | int init_dma; | |
2117 | ||
2118 | /* use_dma changes are ignored till next device re-init */ | |
2119 | init_dma = use_dma; | |
2120 | ||
2121 | /* basic endpoint init */ | |
2122 | for (tmp = 0; tmp < 7; tmp++) { | |
2123 | struct net2280_ep *ep = &dev->ep [tmp]; | |
2124 | ||
2125 | ep->ep.name = ep_name [tmp]; | |
2126 | ep->dev = dev; | |
2127 | ep->num = tmp; | |
2128 | ||
2129 | if (tmp > 0 && tmp <= 4) { | |
2130 | ep->fifo_size = 1024; | |
2131 | if (init_dma) | |
2132 | ep->dma = &dev->dma [tmp - 1]; | |
2133 | } else | |
2134 | ep->fifo_size = 64; | |
2135 | ep->regs = &dev->epregs [tmp]; | |
adc82f77 RR |
2136 | ep->cfg = &dev->epregs[tmp]; |
2137 | ep_reset_228x(dev->regs, ep); | |
1da177e4 | 2138 | } |
e117e742 RB |
2139 | usb_ep_set_maxpacket_limit(&dev->ep [0].ep, 64); |
2140 | usb_ep_set_maxpacket_limit(&dev->ep [5].ep, 64); | |
2141 | usb_ep_set_maxpacket_limit(&dev->ep [6].ep, 64); | |
1da177e4 LT |
2142 | |
2143 | dev->gadget.ep0 = &dev->ep [0].ep; | |
2144 | dev->ep [0].stopped = 0; | |
2145 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); | |
2146 | ||
2147 | /* we want to prevent lowlevel/insecure access from the USB host, | |
2148 | * but erratum 0119 means this enable bit is ignored | |
2149 | */ | |
2150 | for (tmp = 0; tmp < 5; tmp++) | |
2151 | writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg); | |
2152 | } | |
2153 | ||
adc82f77 RR |
2154 | static void usb_reinit_338x(struct net2280 *dev) |
2155 | { | |
2156 | int init_dma; | |
2157 | int i; | |
2158 | u32 tmp, val; | |
2159 | u32 fsmvalue; | |
2160 | static const u32 ne[9] = { 0, 1, 2, 3, 4, 1, 2, 3, 4 }; | |
2161 | static const u32 ep_reg_addr[9] = { 0x00, 0xC0, 0x00, 0xC0, 0x00, | |
2162 | 0x00, 0xC0, 0x00, 0xC0 }; | |
2163 | ||
2164 | /* use_dma changes are ignored till next device re-init */ | |
2165 | init_dma = use_dma; | |
2166 | ||
2167 | /* basic endpoint init */ | |
2168 | for (i = 0; i < dev->n_ep; i++) { | |
2169 | struct net2280_ep *ep = &dev->ep[i]; | |
2170 | ||
2171 | ep->ep.name = ep_name[i]; | |
2172 | ep->dev = dev; | |
2173 | ep->num = i; | |
2174 | ||
2175 | if (i > 0 && i <= 4 && init_dma) | |
2176 | ep->dma = &dev->dma[i - 1]; | |
2177 | ||
2178 | if (dev->enhanced_mode) { | |
2179 | ep->cfg = &dev->epregs[ne[i]]; | |
2180 | ep->regs = (struct net2280_ep_regs __iomem *) | |
2181 | (((void *)&dev->epregs[ne[i]]) + | |
2182 | ep_reg_addr[i]); | |
2183 | ep->fiforegs = &dev->fiforegs[i]; | |
2184 | } else { | |
2185 | ep->cfg = &dev->epregs[i]; | |
2186 | ep->regs = &dev->epregs[i]; | |
2187 | ep->fiforegs = &dev->fiforegs[i]; | |
2188 | } | |
2189 | ||
2190 | ep->fifo_size = (i != 0) ? 2048 : 512; | |
2191 | ||
2192 | ep_reset_338x(dev->regs, ep); | |
2193 | } | |
2194 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 512); | |
2195 | ||
2196 | dev->gadget.ep0 = &dev->ep[0].ep; | |
2197 | dev->ep[0].stopped = 0; | |
2198 | ||
2199 | /* Link layer set up */ | |
2200 | fsmvalue = get_idx_reg(dev->regs, SCRATCH) & | |
2201 | (0xf << DEFECT7374_FSM_FIELD); | |
2202 | ||
2203 | /* See if driver needs to set up for workaround: */ | |
2204 | if (fsmvalue != DEFECT7374_FSM_SS_CONTROL_READ) | |
2205 | INFO(dev, "%s: Defect 7374 FsmValue %08x\n", | |
2206 | __func__, fsmvalue); | |
2207 | else { | |
2208 | tmp = readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2209 | ~(BIT(U1_ENABLE) | BIT(U2_ENABLE) | BIT(LTM_ENABLE)); |
adc82f77 RR |
2210 | writel(tmp, &dev->usb_ext->usbctl2); |
2211 | } | |
2212 | ||
2213 | /* Hardware Defect and Workaround */ | |
2214 | val = readl(&dev->ll_lfps_regs->ll_lfps_5); | |
2215 | val &= ~(0xf << TIMER_LFPS_6US); | |
2216 | val |= 0x5 << TIMER_LFPS_6US; | |
2217 | writel(val, &dev->ll_lfps_regs->ll_lfps_5); | |
2218 | ||
2219 | val = readl(&dev->ll_lfps_regs->ll_lfps_6); | |
2220 | val &= ~(0xffff << TIMER_LFPS_80US); | |
2221 | val |= 0x0100 << TIMER_LFPS_80US; | |
2222 | writel(val, &dev->ll_lfps_regs->ll_lfps_6); | |
2223 | ||
2224 | /* | |
2225 | * AA_AB Errata. Issue 4. Workaround for SuperSpeed USB | |
2226 | * Hot Reset Exit Handshake may Fail in Specific Case using | |
2227 | * Default Register Settings. Workaround for Enumeration test. | |
2228 | */ | |
2229 | val = readl(&dev->ll_tsn_regs->ll_tsn_counters_2); | |
2230 | val &= ~(0x1f << HOT_TX_NORESET_TS2); | |
2231 | val |= 0x10 << HOT_TX_NORESET_TS2; | |
2232 | writel(val, &dev->ll_tsn_regs->ll_tsn_counters_2); | |
2233 | ||
2234 | val = readl(&dev->ll_tsn_regs->ll_tsn_counters_3); | |
2235 | val &= ~(0x1f << HOT_RX_RESET_TS2); | |
2236 | val |= 0x3 << HOT_RX_RESET_TS2; | |
2237 | writel(val, &dev->ll_tsn_regs->ll_tsn_counters_3); | |
2238 | ||
2239 | /* | |
2240 | * Set Recovery Idle to Recover bit: | |
2241 | * - On SS connections, setting Recovery Idle to Recover Fmw improves | |
2242 | * link robustness with various hosts and hubs. | |
2243 | * - It is safe to set for all connection speeds; all chip revisions. | |
2244 | * - R-M-W to leave other bits undisturbed. | |
2245 | * - Reference PLX TT-7372 | |
2246 | */ | |
2247 | val = readl(&dev->ll_chicken_reg->ll_tsn_chicken_bit); | |
3e76fdcb | 2248 | val |= BIT(RECOVERY_IDLE_TO_RECOVER_FMW); |
adc82f77 RR |
2249 | writel(val, &dev->ll_chicken_reg->ll_tsn_chicken_bit); |
2250 | ||
2251 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
2252 | ||
2253 | /* disable dedicated endpoints */ | |
2254 | writel(0x0D, &dev->dep[0].dep_cfg); | |
2255 | writel(0x0D, &dev->dep[1].dep_cfg); | |
2256 | writel(0x0E, &dev->dep[2].dep_cfg); | |
2257 | writel(0x0E, &dev->dep[3].dep_cfg); | |
2258 | writel(0x0F, &dev->dep[4].dep_cfg); | |
2259 | writel(0x0C, &dev->dep[5].dep_cfg); | |
2260 | } | |
2261 | ||
2262 | static void usb_reinit(struct net2280 *dev) | |
2263 | { | |
c2db8a8a | 2264 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 RR |
2265 | return usb_reinit_228x(dev); |
2266 | return usb_reinit_338x(dev); | |
2267 | } | |
2268 | ||
2269 | static void ep0_start_228x(struct net2280 *dev) | |
1da177e4 | 2270 | { |
3e76fdcb RR |
2271 | writel(BIT(CLEAR_EP_HIDE_STATUS_PHASE) | |
2272 | BIT(CLEAR_NAK_OUT_PACKETS) | | |
2273 | BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) | |
1da177e4 LT |
2274 | , &dev->epregs [0].ep_rsp); |
2275 | ||
2276 | /* | |
2277 | * hardware optionally handles a bunch of standard requests | |
2278 | * that the API hides from drivers anyway. have it do so. | |
2279 | * endpoint status/features are handled in software, to | |
2280 | * help pass tests for some dubious behavior. | |
2281 | */ | |
3e76fdcb RR |
2282 | writel(BIT(SET_TEST_MODE) | |
2283 | BIT(SET_ADDRESS) | | |
2284 | BIT(DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) | | |
2285 | BIT(GET_DEVICE_STATUS) | | |
2286 | BIT(GET_INTERFACE_STATUS) | |
1da177e4 | 2287 | , &dev->usb->stdrsp); |
3e76fdcb RR |
2288 | writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | |
2289 | BIT(SELF_POWERED_USB_DEVICE) | | |
2290 | BIT(REMOTE_WAKEUP_SUPPORT) | | |
2291 | (dev->softconnect << USB_DETECT_ENABLE) | | |
2292 | BIT(SELF_POWERED_STATUS), | |
2293 | &dev->usb->usbctl); | |
1da177e4 LT |
2294 | |
2295 | /* enable irqs so we can see ep0 and general operation */ | |
3e76fdcb RR |
2296 | writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | |
2297 | BIT(ENDPOINT_0_INTERRUPT_ENABLE), | |
2298 | &dev->regs->pciirqenb0); | |
2299 | writel(BIT(PCI_INTERRUPT_ENABLE) | | |
2300 | BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) | | |
2301 | BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) | | |
2302 | BIT(PCI_RETRY_ABORT_INTERRUPT_ENABLE) | | |
2303 | BIT(VBUS_INTERRUPT_ENABLE) | | |
2304 | BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
2305 | BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE), | |
2306 | &dev->regs->pciirqenb1); | |
1da177e4 LT |
2307 | |
2308 | /* don't leave any writes posted */ | |
2309 | (void) readl (&dev->usb->usbctl); | |
2310 | } | |
2311 | ||
adc82f77 RR |
2312 | static void ep0_start_338x(struct net2280 *dev) |
2313 | { | |
2314 | u32 fsmvalue; | |
2315 | ||
2316 | fsmvalue = get_idx_reg(dev->regs, SCRATCH) & | |
2317 | (0xf << DEFECT7374_FSM_FIELD); | |
2318 | ||
2319 | if (fsmvalue != DEFECT7374_FSM_SS_CONTROL_READ) | |
2320 | INFO(dev, "%s: Defect 7374 FsmValue %08x\n", __func__, | |
2321 | fsmvalue); | |
2322 | else | |
3e76fdcb RR |
2323 | writel(BIT(CLEAR_NAK_OUT_PACKETS_MODE) | |
2324 | BIT(SET_EP_HIDE_STATUS_PHASE), | |
adc82f77 RR |
2325 | &dev->epregs[0].ep_rsp); |
2326 | ||
2327 | /* | |
2328 | * hardware optionally handles a bunch of standard requests | |
2329 | * that the API hides from drivers anyway. have it do so. | |
2330 | * endpoint status/features are handled in software, to | |
2331 | * help pass tests for some dubious behavior. | |
2332 | */ | |
3e76fdcb RR |
2333 | writel(BIT(SET_ISOCHRONOUS_DELAY) | |
2334 | BIT(SET_SEL) | | |
2335 | BIT(SET_TEST_MODE) | | |
2336 | BIT(SET_ADDRESS) | | |
2337 | BIT(GET_INTERFACE_STATUS) | | |
2338 | BIT(GET_DEVICE_STATUS), | |
adc82f77 RR |
2339 | &dev->usb->stdrsp); |
2340 | dev->wakeup_enable = 1; | |
3e76fdcb | 2341 | writel(BIT(USB_ROOT_PORT_WAKEUP_ENABLE) | |
adc82f77 | 2342 | (dev->softconnect << USB_DETECT_ENABLE) | |
3e76fdcb | 2343 | BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RR |
2344 | &dev->usb->usbctl); |
2345 | ||
2346 | /* enable irqs so we can see ep0 and general operation */ | |
3e76fdcb RR |
2347 | writel(BIT(SETUP_PACKET_INTERRUPT_ENABLE) | |
2348 | BIT(ENDPOINT_0_INTERRUPT_ENABLE) | |
adc82f77 | 2349 | , &dev->regs->pciirqenb0); |
3e76fdcb RR |
2350 | writel(BIT(PCI_INTERRUPT_ENABLE) | |
2351 | BIT(ROOT_PORT_RESET_INTERRUPT_ENABLE) | | |
2352 | BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) | | |
2353 | BIT(VBUS_INTERRUPT_ENABLE), | |
adc82f77 RR |
2354 | &dev->regs->pciirqenb1); |
2355 | ||
2356 | /* don't leave any writes posted */ | |
2357 | (void)readl(&dev->usb->usbctl); | |
2358 | } | |
2359 | ||
2360 | static void ep0_start(struct net2280 *dev) | |
2361 | { | |
c2db8a8a | 2362 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 RR |
2363 | return ep0_start_228x(dev); |
2364 | return ep0_start_338x(dev); | |
2365 | } | |
2366 | ||
1da177e4 LT |
2367 | /* when a driver is successfully registered, it will receive |
2368 | * control requests including set_configuration(), which enables | |
2369 | * non-control requests. then usb traffic follows until a | |
2370 | * disconnect is reported. then a host may connect again, or | |
2371 | * the driver might get unbound. | |
2372 | */ | |
4cf5e00b FB |
2373 | static int net2280_start(struct usb_gadget *_gadget, |
2374 | struct usb_gadget_driver *driver) | |
1da177e4 | 2375 | { |
4cf5e00b | 2376 | struct net2280 *dev; |
1da177e4 LT |
2377 | int retval; |
2378 | unsigned i; | |
2379 | ||
2380 | /* insist on high speed support from the driver, since | |
2381 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) | |
2382 | * "must not be used in normal operation" | |
2383 | */ | |
7177aed4 | 2384 | if (!driver || driver->max_speed < USB_SPEED_HIGH |
4cf5e00b | 2385 | || !driver->setup) |
1da177e4 | 2386 | return -EINVAL; |
4cf5e00b FB |
2387 | |
2388 | dev = container_of (_gadget, struct net2280, gadget); | |
1da177e4 | 2389 | |
adc82f77 | 2390 | for (i = 0; i < dev->n_ep; i++) |
1da177e4 LT |
2391 | dev->ep [i].irqs = 0; |
2392 | ||
2393 | /* hook up the driver ... */ | |
2394 | dev->softconnect = 1; | |
2395 | driver->driver.bus = NULL; | |
2396 | dev->driver = driver; | |
1da177e4 | 2397 | |
b3899dac JG |
2398 | retval = device_create_file (&dev->pdev->dev, &dev_attr_function); |
2399 | if (retval) goto err_unbind; | |
2400 | retval = device_create_file (&dev->pdev->dev, &dev_attr_queues); | |
2401 | if (retval) goto err_func; | |
1da177e4 | 2402 | |
2f076077 | 2403 | /* Enable force-full-speed testing mode, if desired */ |
c2db8a8a | 2404 | if (full_speed && dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
3e76fdcb | 2405 | writel(BIT(FORCE_FULL_SPEED_MODE), &dev->usb->xcvrdiag); |
2f076077 | 2406 | |
1da177e4 LT |
2407 | /* ... then enable host detection and ep0; and we're ready |
2408 | * for set_configuration as well as eventual disconnect. | |
2409 | */ | |
2410 | net2280_led_active (dev, 1); | |
adc82f77 | 2411 | |
c2db8a8a | 2412 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 RR |
2413 | defect7374_enable_data_eps_zero(dev); |
2414 | ||
1da177e4 LT |
2415 | ep0_start (dev); |
2416 | ||
2417 | DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n", | |
2418 | driver->driver.name, | |
2419 | readl (&dev->usb->usbctl), | |
2420 | readl (&dev->usb->stdrsp)); | |
2421 | ||
2422 | /* pci writes may still be posted */ | |
2423 | return 0; | |
b3899dac JG |
2424 | |
2425 | err_func: | |
2426 | device_remove_file (&dev->pdev->dev, &dev_attr_function); | |
2427 | err_unbind: | |
b3899dac JG |
2428 | dev->driver = NULL; |
2429 | return retval; | |
1da177e4 | 2430 | } |
1da177e4 LT |
2431 | |
2432 | static void | |
2433 | stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver) | |
2434 | { | |
2435 | int i; | |
2436 | ||
2437 | /* don't disconnect if it's not connected */ | |
2438 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) | |
2439 | driver = NULL; | |
2440 | ||
2441 | /* stop hardware; prevent new request submissions; | |
2442 | * and kill any outstanding requests. | |
2443 | */ | |
2444 | usb_reset (dev); | |
adc82f77 | 2445 | for (i = 0; i < dev->n_ep; i++) |
1da177e4 LT |
2446 | nuke (&dev->ep [i]); |
2447 | ||
699412d9 FB |
2448 | /* report disconnect; the driver is already quiesced */ |
2449 | if (driver) { | |
2450 | spin_unlock(&dev->lock); | |
2451 | driver->disconnect(&dev->gadget); | |
2452 | spin_lock(&dev->lock); | |
2453 | } | |
2454 | ||
1da177e4 LT |
2455 | usb_reinit (dev); |
2456 | } | |
2457 | ||
4cf5e00b FB |
2458 | static int net2280_stop(struct usb_gadget *_gadget, |
2459 | struct usb_gadget_driver *driver) | |
1da177e4 | 2460 | { |
4cf5e00b | 2461 | struct net2280 *dev; |
1da177e4 LT |
2462 | unsigned long flags; |
2463 | ||
4cf5e00b | 2464 | dev = container_of (_gadget, struct net2280, gadget); |
1da177e4 LT |
2465 | |
2466 | spin_lock_irqsave (&dev->lock, flags); | |
2467 | stop_activity (dev, driver); | |
2468 | spin_unlock_irqrestore (&dev->lock, flags); | |
2469 | ||
1da177e4 LT |
2470 | dev->driver = NULL; |
2471 | ||
2472 | net2280_led_active (dev, 0); | |
2f076077 AS |
2473 | |
2474 | /* Disable full-speed test mode */ | |
c2db8a8a | 2475 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 | 2476 | writel(0, &dev->usb->xcvrdiag); |
2f076077 | 2477 | |
1da177e4 LT |
2478 | device_remove_file (&dev->pdev->dev, &dev_attr_function); |
2479 | device_remove_file (&dev->pdev->dev, &dev_attr_queues); | |
2480 | ||
84237bfb RR |
2481 | DEBUG(dev, "unregistered driver '%s'\n", |
2482 | driver ? driver->driver.name : ""); | |
2483 | ||
1da177e4 LT |
2484 | return 0; |
2485 | } | |
1da177e4 LT |
2486 | |
2487 | /*-------------------------------------------------------------------------*/ | |
2488 | ||
2489 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. | |
2490 | * also works for dma-capable endpoints, in pio mode or just | |
2491 | * to manually advance the queue after short OUT transfers. | |
2492 | */ | |
2493 | static void handle_ep_small (struct net2280_ep *ep) | |
2494 | { | |
2495 | struct net2280_request *req; | |
2496 | u32 t; | |
2497 | /* 0 error, 1 mid-data, 2 done */ | |
2498 | int mode = 1; | |
2499 | ||
2500 | if (!list_empty (&ep->queue)) | |
2501 | req = list_entry (ep->queue.next, | |
2502 | struct net2280_request, queue); | |
2503 | else | |
2504 | req = NULL; | |
2505 | ||
2506 | /* ack all, and handle what we care about */ | |
2507 | t = readl (&ep->regs->ep_stat); | |
2508 | ep->irqs++; | |
2509 | #if 0 | |
2510 | VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n", | |
2511 | ep->ep.name, t, req ? &req->req : 0); | |
2512 | #endif | |
950ee4c8 | 2513 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) |
3e76fdcb | 2514 | writel(t & ~BIT(NAK_OUT_PACKETS), &ep->regs->ep_stat); |
950ee4c8 GL |
2515 | else |
2516 | /* Added for 2282 */ | |
2517 | writel (t, &ep->regs->ep_stat); | |
1da177e4 LT |
2518 | |
2519 | /* for ep0, monitor token irqs to catch data stage length errors | |
2520 | * and to synchronize on status. | |
2521 | * | |
2522 | * also, to defer reporting of protocol stalls ... here's where | |
2523 | * data or status first appears, handling stalls here should never | |
2524 | * cause trouble on the host side.. | |
2525 | * | |
2526 | * control requests could be slightly faster without token synch for | |
2527 | * status, but status can jam up that way. | |
2528 | */ | |
2529 | if (unlikely (ep->num == 0)) { | |
2530 | if (ep->is_in) { | |
2531 | /* status; stop NAKing */ | |
3e76fdcb | 2532 | if (t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2533 | if (ep->dev->protocol_stall) { |
2534 | ep->stopped = 1; | |
2535 | set_halt (ep); | |
2536 | } | |
2537 | if (!req) | |
2538 | allow_status (ep); | |
2539 | mode = 2; | |
2540 | /* reply to extra IN data tokens with a zlp */ | |
3e76fdcb | 2541 | } else if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2542 | if (ep->dev->protocol_stall) { |
2543 | ep->stopped = 1; | |
2544 | set_halt (ep); | |
2545 | mode = 2; | |
1f26e28d AS |
2546 | } else if (ep->responded && |
2547 | !req && !ep->stopped) | |
1da177e4 LT |
2548 | write_fifo (ep, NULL); |
2549 | } | |
2550 | } else { | |
2551 | /* status; stop NAKing */ | |
3e76fdcb | 2552 | if (t & BIT(DATA_IN_TOKEN_INTERRUPT)) { |
1da177e4 LT |
2553 | if (ep->dev->protocol_stall) { |
2554 | ep->stopped = 1; | |
2555 | set_halt (ep); | |
2556 | } | |
2557 | mode = 2; | |
2558 | /* an extra OUT token is an error */ | |
3e76fdcb | 2559 | } else if (((t & BIT(DATA_OUT_PING_TOKEN_INTERRUPT)) |
1da177e4 LT |
2560 | && req |
2561 | && req->req.actual == req->req.length) | |
1f26e28d | 2562 | || (ep->responded && !req)) { |
1da177e4 LT |
2563 | ep->dev->protocol_stall = 1; |
2564 | set_halt (ep); | |
2565 | ep->stopped = 1; | |
2566 | if (req) | |
2567 | done (ep, req, -EOVERFLOW); | |
2568 | req = NULL; | |
2569 | } | |
2570 | } | |
2571 | } | |
2572 | ||
2573 | if (unlikely (!req)) | |
2574 | return; | |
2575 | ||
2576 | /* manual DMA queue advance after short OUT */ | |
ad303db6 | 2577 | if (likely (ep->dma)) { |
3e76fdcb | 2578 | if (t & BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT)) { |
1da177e4 LT |
2579 | u32 count; |
2580 | int stopped = ep->stopped; | |
2581 | ||
2582 | /* TRANSFERRED works around OUT_DONE erratum 0112. | |
2583 | * we expect (N <= maxpacket) bytes; host wrote M. | |
2584 | * iff (M < N) we won't ever see a DMA interrupt. | |
2585 | */ | |
2586 | ep->stopped = 1; | |
2587 | for (count = 0; ; t = readl (&ep->regs->ep_stat)) { | |
2588 | ||
2589 | /* any preceding dma transfers must finish. | |
2590 | * dma handles (M >= N), may empty the queue | |
2591 | */ | |
2592 | scan_dma_completions (ep); | |
2593 | if (unlikely (list_empty (&ep->queue) | |
2594 | || ep->out_overflow)) { | |
2595 | req = NULL; | |
2596 | break; | |
2597 | } | |
2598 | req = list_entry (ep->queue.next, | |
2599 | struct net2280_request, queue); | |
2600 | ||
2601 | /* here either (M < N), a "real" short rx; | |
2602 | * or (M == N) and the queue didn't empty | |
2603 | */ | |
3e76fdcb | 2604 | if (likely(t & BIT(FIFO_EMPTY))) { |
1da177e4 LT |
2605 | count = readl (&ep->dma->dmacount); |
2606 | count &= DMA_BYTE_COUNT_MASK; | |
2607 | if (readl (&ep->dma->dmadesc) | |
2608 | != req->td_dma) | |
2609 | req = NULL; | |
2610 | break; | |
2611 | } | |
2612 | udelay(1); | |
2613 | } | |
2614 | ||
2615 | /* stop DMA, leave ep NAKing */ | |
3e76fdcb | 2616 | writel(BIT(DMA_ABORT), &ep->dma->dmastat); |
1da177e4 LT |
2617 | spin_stop_dma (ep->dma); |
2618 | ||
2619 | if (likely (req)) { | |
2620 | req->td->dmacount = 0; | |
2621 | t = readl (&ep->regs->ep_avail); | |
68dcc688 | 2622 | dma_done (ep, req, count, |
901b3d75 DB |
2623 | (ep->out_overflow || t) |
2624 | ? -EOVERFLOW : 0); | |
1da177e4 LT |
2625 | } |
2626 | ||
2627 | /* also flush to prevent erratum 0106 trouble */ | |
2628 | if (unlikely (ep->out_overflow | |
2629 | || (ep->dev->chiprev == 0x0100 | |
2630 | && ep->dev->gadget.speed | |
2631 | == USB_SPEED_FULL))) { | |
2632 | out_flush (ep); | |
2633 | ep->out_overflow = 0; | |
2634 | } | |
2635 | ||
2636 | /* (re)start dma if needed, stop NAKing */ | |
2637 | ep->stopped = stopped; | |
2638 | if (!list_empty (&ep->queue)) | |
2639 | restart_dma (ep); | |
2640 | } else | |
2641 | DEBUG (ep->dev, "%s dma ep_stat %08x ??\n", | |
2642 | ep->ep.name, t); | |
2643 | return; | |
2644 | ||
2645 | /* data packet(s) received (in the fifo, OUT) */ | |
3e76fdcb | 2646 | } else if (t & BIT(DATA_PACKET_RECEIVED_INTERRUPT)) { |
1da177e4 LT |
2647 | if (read_fifo (ep, req) && ep->num != 0) |
2648 | mode = 2; | |
2649 | ||
2650 | /* data packet(s) transmitted (IN) */ | |
3e76fdcb | 2651 | } else if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) { |
1da177e4 LT |
2652 | unsigned len; |
2653 | ||
2654 | len = req->req.length - req->req.actual; | |
2655 | if (len > ep->ep.maxpacket) | |
2656 | len = ep->ep.maxpacket; | |
2657 | req->req.actual += len; | |
2658 | ||
2659 | /* if we wrote it all, we're usually done */ | |
2660 | if (req->req.actual == req->req.length) { | |
2661 | if (ep->num == 0) { | |
317e83b8 | 2662 | /* send zlps until the status stage */ |
1da177e4 LT |
2663 | } else if (!req->req.zero || len != ep->ep.maxpacket) |
2664 | mode = 2; | |
2665 | } | |
2666 | ||
2667 | /* there was nothing to do ... */ | |
2668 | } else if (mode == 1) | |
2669 | return; | |
2670 | ||
2671 | /* done */ | |
2672 | if (mode == 2) { | |
2673 | /* stream endpoints often resubmit/unlink in completion */ | |
2674 | done (ep, req, 0); | |
2675 | ||
2676 | /* maybe advance queue to next request */ | |
2677 | if (ep->num == 0) { | |
2678 | /* NOTE: net2280 could let gadget driver start the | |
2679 | * status stage later. since not all controllers let | |
2680 | * them control that, the api doesn't (yet) allow it. | |
2681 | */ | |
2682 | if (!ep->stopped) | |
2683 | allow_status (ep); | |
2684 | req = NULL; | |
2685 | } else { | |
2686 | if (!list_empty (&ep->queue) && !ep->stopped) | |
2687 | req = list_entry (ep->queue.next, | |
2688 | struct net2280_request, queue); | |
2689 | else | |
2690 | req = NULL; | |
2691 | if (req && !ep->is_in) | |
2692 | stop_out_naking (ep); | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* is there a buffer for the next packet? | |
2697 | * for best streaming performance, make sure there is one. | |
2698 | */ | |
2699 | if (req && !ep->stopped) { | |
2700 | ||
2701 | /* load IN fifo with next packet (may be zlp) */ | |
3e76fdcb | 2702 | if (t & BIT(DATA_PACKET_TRANSMITTED_INTERRUPT)) |
1da177e4 LT |
2703 | write_fifo (ep, &req->req); |
2704 | } | |
2705 | } | |
2706 | ||
2707 | static struct net2280_ep * | |
2708 | get_ep_by_addr (struct net2280 *dev, u16 wIndex) | |
2709 | { | |
2710 | struct net2280_ep *ep; | |
2711 | ||
2712 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) | |
2713 | return &dev->ep [0]; | |
2714 | list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) { | |
2715 | u8 bEndpointAddress; | |
2716 | ||
2717 | if (!ep->desc) | |
2718 | continue; | |
2719 | bEndpointAddress = ep->desc->bEndpointAddress; | |
2720 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) | |
2721 | continue; | |
2722 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) | |
2723 | return ep; | |
2724 | } | |
2725 | return NULL; | |
2726 | } | |
2727 | ||
adc82f77 RR |
2728 | static void defect7374_workaround(struct net2280 *dev, struct usb_ctrlrequest r) |
2729 | { | |
2730 | u32 scratch, fsmvalue; | |
2731 | u32 ack_wait_timeout, state; | |
2732 | ||
2733 | /* Workaround for Defect 7374 (U1/U2 erroneously rejected): */ | |
2734 | scratch = get_idx_reg(dev->regs, SCRATCH); | |
2735 | fsmvalue = scratch & (0xf << DEFECT7374_FSM_FIELD); | |
2736 | scratch &= ~(0xf << DEFECT7374_FSM_FIELD); | |
2737 | ||
2738 | if (!((fsmvalue == DEFECT7374_FSM_WAITING_FOR_CONTROL_READ) && | |
2739 | (r.bRequestType & USB_DIR_IN))) | |
2740 | return; | |
2741 | ||
2742 | /* This is the first Control Read for this connection: */ | |
3e76fdcb | 2743 | if (!(readl(&dev->usb->usbstat) & BIT(SUPER_SPEED_MODE))) { |
adc82f77 RR |
2744 | /* |
2745 | * Connection is NOT SS: | |
2746 | * - Connection must be FS or HS. | |
2747 | * - This FSM state should allow workaround software to | |
2748 | * run after the next USB connection. | |
2749 | */ | |
2750 | scratch |= DEFECT7374_FSM_NON_SS_CONTROL_READ; | |
2751 | goto restore_data_eps; | |
2752 | } | |
2753 | ||
2754 | /* Connection is SS: */ | |
2755 | for (ack_wait_timeout = 0; | |
2756 | ack_wait_timeout < DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS; | |
2757 | ack_wait_timeout++) { | |
2758 | ||
2759 | state = readl(&dev->plregs->pl_ep_status_1) | |
2760 | & (0xff << STATE); | |
2761 | if ((state >= (ACK_GOOD_NORMAL << STATE)) && | |
2762 | (state <= (ACK_GOOD_MORE_ACKS_TO_COME << STATE))) { | |
2763 | scratch |= DEFECT7374_FSM_SS_CONTROL_READ; | |
2764 | break; | |
2765 | } | |
2766 | ||
2767 | /* | |
2768 | * We have not yet received host's Data Phase ACK | |
2769 | * - Wait and try again. | |
2770 | */ | |
2771 | udelay(DEFECT_7374_PROCESSOR_WAIT_TIME); | |
2772 | ||
2773 | continue; | |
2774 | } | |
2775 | ||
2776 | ||
2777 | if (ack_wait_timeout >= DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS) { | |
2778 | ERROR(dev, "FAIL: Defect 7374 workaround waited but failed " | |
2779 | "to detect SS host's data phase ACK."); | |
2780 | ERROR(dev, "PL_EP_STATUS_1(23:16):.Expected from 0x11 to 0x16" | |
2781 | "got 0x%2.2x.\n", state >> STATE); | |
2782 | } else { | |
2783 | WARNING(dev, "INFO: Defect 7374 workaround waited about\n" | |
2784 | "%duSec for Control Read Data Phase ACK\n", | |
2785 | DEFECT_7374_PROCESSOR_WAIT_TIME * ack_wait_timeout); | |
2786 | } | |
2787 | ||
2788 | restore_data_eps: | |
2789 | /* | |
2790 | * Restore data EPs to their pre-workaround settings (disabled, | |
2791 | * initialized, and other details). | |
2792 | */ | |
2793 | defect7374_disable_data_eps(dev); | |
2794 | ||
2795 | set_idx_reg(dev->regs, SCRATCH, scratch); | |
2796 | ||
2797 | return; | |
2798 | } | |
2799 | ||
2800 | static void ep_stall(struct net2280_ep *ep, int stall) | |
2801 | { | |
2802 | struct net2280 *dev = ep->dev; | |
2803 | u32 val; | |
2804 | static const u32 ep_pl[9] = { 0, 3, 4, 7, 8, 2, 5, 6, 9 }; | |
2805 | ||
2806 | if (stall) { | |
3e76fdcb RR |
2807 | writel(BIT(SET_ENDPOINT_HALT) | |
2808 | /* BIT(SET_NAK_PACKETS) | */ | |
2809 | BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), | |
adc82f77 RR |
2810 | &ep->regs->ep_rsp); |
2811 | ep->is_halt = 1; | |
2812 | } else { | |
2813 | if (dev->gadget.speed == USB_SPEED_SUPER) { | |
2814 | /* | |
2815 | * Workaround for SS SeqNum not cleared via | |
2816 | * Endpoint Halt (Clear) bit. select endpoint | |
2817 | */ | |
2818 | val = readl(&dev->plregs->pl_ep_ctrl); | |
2819 | val = (val & ~0x1f) | ep_pl[ep->num]; | |
2820 | writel(val, &dev->plregs->pl_ep_ctrl); | |
2821 | ||
3e76fdcb | 2822 | val |= BIT(SEQUENCE_NUMBER_RESET); |
adc82f77 RR |
2823 | writel(val, &dev->plregs->pl_ep_ctrl); |
2824 | } | |
2825 | val = readl(&ep->regs->ep_rsp); | |
3e76fdcb RR |
2826 | val |= BIT(CLEAR_ENDPOINT_HALT) | |
2827 | BIT(CLEAR_ENDPOINT_TOGGLE); | |
adc82f77 | 2828 | writel(val |
3e76fdcb | 2829 | /* | BIT(CLEAR_NAK_PACKETS)*/ |
adc82f77 RR |
2830 | , &ep->regs->ep_rsp); |
2831 | ep->is_halt = 0; | |
2832 | val = readl(&ep->regs->ep_rsp); | |
2833 | } | |
2834 | } | |
2835 | ||
2836 | static void ep_stdrsp(struct net2280_ep *ep, int value, int wedged) | |
2837 | { | |
2838 | /* set/clear, then synch memory views with the device */ | |
2839 | if (value) { | |
2840 | ep->stopped = 1; | |
2841 | if (ep->num == 0) | |
2842 | ep->dev->protocol_stall = 1; | |
2843 | else { | |
2844 | if (ep->dma) | |
2845 | ep_stop_dma(ep); | |
2846 | ep_stall(ep, true); | |
2847 | } | |
2848 | ||
2849 | if (wedged) | |
2850 | ep->wedged = 1; | |
2851 | } else { | |
2852 | ep->stopped = 0; | |
2853 | ep->wedged = 0; | |
2854 | ||
2855 | ep_stall(ep, false); | |
2856 | ||
2857 | /* Flush the queue */ | |
2858 | if (!list_empty(&ep->queue)) { | |
2859 | struct net2280_request *req = | |
2860 | list_entry(ep->queue.next, struct net2280_request, | |
2861 | queue); | |
2862 | if (ep->dma) | |
2863 | resume_dma(ep); | |
2864 | else { | |
2865 | if (ep->is_in) | |
2866 | write_fifo(ep, &req->req); | |
2867 | else { | |
2868 | if (read_fifo(ep, req)) | |
2869 | done(ep, req, 0); | |
2870 | } | |
2871 | } | |
2872 | } | |
2873 | } | |
2874 | } | |
2875 | ||
2876 | static void handle_stat0_irqs_superspeed(struct net2280 *dev, | |
2877 | struct net2280_ep *ep, struct usb_ctrlrequest r) | |
2878 | { | |
2879 | int tmp = 0; | |
2880 | ||
2881 | #define w_value le16_to_cpu(r.wValue) | |
2882 | #define w_index le16_to_cpu(r.wIndex) | |
2883 | #define w_length le16_to_cpu(r.wLength) | |
2884 | ||
2885 | switch (r.bRequest) { | |
2886 | struct net2280_ep *e; | |
2887 | u16 status; | |
2888 | ||
2889 | case USB_REQ_SET_CONFIGURATION: | |
2890 | dev->addressed_state = !w_value; | |
2891 | goto usb3_delegate; | |
2892 | ||
2893 | case USB_REQ_GET_STATUS: | |
2894 | switch (r.bRequestType) { | |
2895 | case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2896 | status = dev->wakeup_enable ? 0x02 : 0x00; | |
2897 | if (dev->selfpowered) | |
3e76fdcb | 2898 | status |= BIT(0); |
adc82f77 RR |
2899 | status |= (dev->u1_enable << 2 | dev->u2_enable << 3 | |
2900 | dev->ltm_enable << 4); | |
2901 | writel(0, &dev->epregs[0].ep_irqenb); | |
2902 | set_fifo_bytecount(ep, sizeof(status)); | |
2903 | writel((__force u32) status, &dev->epregs[0].ep_data); | |
2904 | allow_status_338x(ep); | |
2905 | break; | |
2906 | ||
2907 | case (USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
2908 | e = get_ep_by_addr(dev, w_index); | |
2909 | if (!e) | |
2910 | goto do_stall3; | |
2911 | status = readl(&e->regs->ep_rsp) & | |
3e76fdcb | 2912 | BIT(CLEAR_ENDPOINT_HALT); |
adc82f77 RR |
2913 | writel(0, &dev->epregs[0].ep_irqenb); |
2914 | set_fifo_bytecount(ep, sizeof(status)); | |
2915 | writel((__force u32) status, &dev->epregs[0].ep_data); | |
2916 | allow_status_338x(ep); | |
2917 | break; | |
2918 | ||
2919 | default: | |
2920 | goto usb3_delegate; | |
2921 | } | |
2922 | break; | |
2923 | ||
2924 | case USB_REQ_CLEAR_FEATURE: | |
2925 | switch (r.bRequestType) { | |
2926 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2927 | if (!dev->addressed_state) { | |
2928 | switch (w_value) { | |
2929 | case USB_DEVICE_U1_ENABLE: | |
2930 | dev->u1_enable = 0; | |
2931 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2932 | ~BIT(U1_ENABLE), |
adc82f77 RR |
2933 | &dev->usb_ext->usbctl2); |
2934 | allow_status_338x(ep); | |
2935 | goto next_endpoints3; | |
2936 | ||
2937 | case USB_DEVICE_U2_ENABLE: | |
2938 | dev->u2_enable = 0; | |
2939 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2940 | ~BIT(U2_ENABLE), |
adc82f77 RR |
2941 | &dev->usb_ext->usbctl2); |
2942 | allow_status_338x(ep); | |
2943 | goto next_endpoints3; | |
2944 | ||
2945 | case USB_DEVICE_LTM_ENABLE: | |
2946 | dev->ltm_enable = 0; | |
2947 | writel(readl(&dev->usb_ext->usbctl2) & | |
3e76fdcb | 2948 | ~BIT(LTM_ENABLE), |
adc82f77 RR |
2949 | &dev->usb_ext->usbctl2); |
2950 | allow_status_338x(ep); | |
2951 | goto next_endpoints3; | |
2952 | ||
2953 | default: | |
2954 | break; | |
2955 | } | |
2956 | } | |
2957 | if (w_value == USB_DEVICE_REMOTE_WAKEUP) { | |
2958 | dev->wakeup_enable = 0; | |
2959 | writel(readl(&dev->usb->usbctl) & | |
3e76fdcb | 2960 | ~BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RR |
2961 | &dev->usb->usbctl); |
2962 | allow_status_338x(ep); | |
2963 | break; | |
2964 | } | |
2965 | goto usb3_delegate; | |
2966 | ||
2967 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
2968 | e = get_ep_by_addr(dev, w_index); | |
2969 | if (!e) | |
2970 | goto do_stall3; | |
2971 | if (w_value != USB_ENDPOINT_HALT) | |
2972 | goto do_stall3; | |
2973 | VDEBUG(dev, "%s clear halt\n", e->ep.name); | |
2974 | ep_stall(e, false); | |
2975 | if (!list_empty(&e->queue) && e->td_dma) | |
2976 | restart_dma(e); | |
2977 | allow_status(ep); | |
2978 | ep->stopped = 1; | |
2979 | break; | |
2980 | ||
2981 | default: | |
2982 | goto usb3_delegate; | |
2983 | } | |
2984 | break; | |
2985 | case USB_REQ_SET_FEATURE: | |
2986 | switch (r.bRequestType) { | |
2987 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE): | |
2988 | if (!dev->addressed_state) { | |
2989 | switch (w_value) { | |
2990 | case USB_DEVICE_U1_ENABLE: | |
2991 | dev->u1_enable = 1; | |
2992 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 2993 | BIT(U1_ENABLE), |
adc82f77 RR |
2994 | &dev->usb_ext->usbctl2); |
2995 | allow_status_338x(ep); | |
2996 | goto next_endpoints3; | |
2997 | ||
2998 | case USB_DEVICE_U2_ENABLE: | |
2999 | dev->u2_enable = 1; | |
3000 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 3001 | BIT(U2_ENABLE), |
adc82f77 RR |
3002 | &dev->usb_ext->usbctl2); |
3003 | allow_status_338x(ep); | |
3004 | goto next_endpoints3; | |
3005 | ||
3006 | case USB_DEVICE_LTM_ENABLE: | |
3007 | dev->ltm_enable = 1; | |
3008 | writel(readl(&dev->usb_ext->usbctl2) | | |
3e76fdcb | 3009 | BIT(LTM_ENABLE), |
adc82f77 RR |
3010 | &dev->usb_ext->usbctl2); |
3011 | allow_status_338x(ep); | |
3012 | goto next_endpoints3; | |
3013 | default: | |
3014 | break; | |
3015 | } | |
3016 | } | |
3017 | ||
3018 | if (w_value == USB_DEVICE_REMOTE_WAKEUP) { | |
3019 | dev->wakeup_enable = 1; | |
3020 | writel(readl(&dev->usb->usbctl) | | |
3e76fdcb | 3021 | BIT(DEVICE_REMOTE_WAKEUP_ENABLE), |
adc82f77 RR |
3022 | &dev->usb->usbctl); |
3023 | allow_status_338x(ep); | |
3024 | break; | |
3025 | } | |
3026 | goto usb3_delegate; | |
3027 | ||
3028 | case (USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): | |
3029 | e = get_ep_by_addr(dev, w_index); | |
3030 | if (!e || (w_value != USB_ENDPOINT_HALT)) | |
3031 | goto do_stall3; | |
3032 | ep_stdrsp(e, true, false); | |
3033 | allow_status_338x(ep); | |
3034 | break; | |
3035 | ||
3036 | default: | |
3037 | goto usb3_delegate; | |
3038 | } | |
3039 | ||
3040 | break; | |
3041 | default: | |
3042 | ||
3043 | usb3_delegate: | |
3044 | VDEBUG(dev, "setup %02x.%02x v%04x i%04x l%04x ep_cfg %08x\n", | |
3045 | r.bRequestType, r.bRequest, | |
3046 | w_value, w_index, w_length, | |
3047 | readl(&ep->cfg->ep_cfg)); | |
3048 | ||
3049 | ep->responded = 0; | |
3050 | spin_unlock(&dev->lock); | |
3051 | tmp = dev->driver->setup(&dev->gadget, &r); | |
3052 | spin_lock(&dev->lock); | |
3053 | } | |
3054 | do_stall3: | |
3055 | if (tmp < 0) { | |
3056 | VDEBUG(dev, "req %02x.%02x protocol STALL; stat %d\n", | |
3057 | r.bRequestType, r.bRequest, tmp); | |
3058 | dev->protocol_stall = 1; | |
3059 | /* TD 9.9 Halt Endpoint test. TD 9.22 Set feature test */ | |
3060 | ep_stall(ep, true); | |
3061 | } | |
3062 | ||
3063 | next_endpoints3: | |
3064 | ||
3065 | #undef w_value | |
3066 | #undef w_index | |
3067 | #undef w_length | |
3068 | ||
3069 | return; | |
3070 | } | |
3071 | ||
1da177e4 LT |
3072 | static void handle_stat0_irqs (struct net2280 *dev, u32 stat) |
3073 | { | |
3074 | struct net2280_ep *ep; | |
3075 | u32 num, scratch; | |
3076 | ||
3077 | /* most of these don't need individual acks */ | |
3e76fdcb | 3078 | stat &= ~BIT(INTA_ASSERTED); |
1da177e4 LT |
3079 | if (!stat) |
3080 | return; | |
3081 | // DEBUG (dev, "irqstat0 %04x\n", stat); | |
3082 | ||
3083 | /* starting a control request? */ | |
3e76fdcb | 3084 | if (unlikely(stat & BIT(SETUP_PACKET_INTERRUPT))) { |
1da177e4 LT |
3085 | union { |
3086 | u32 raw [2]; | |
3087 | struct usb_ctrlrequest r; | |
3088 | } u; | |
950ee4c8 | 3089 | int tmp; |
1da177e4 LT |
3090 | struct net2280_request *req; |
3091 | ||
3092 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { | |
adc82f77 | 3093 | u32 val = readl(&dev->usb->usbstat); |
3e76fdcb | 3094 | if (val & BIT(SUPER_SPEED)) { |
adc82f77 RR |
3095 | dev->gadget.speed = USB_SPEED_SUPER; |
3096 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, | |
3097 | EP0_SS_MAX_PACKET_SIZE); | |
3e76fdcb | 3098 | } else if (val & BIT(HIGH_SPEED)) { |
1da177e4 | 3099 | dev->gadget.speed = USB_SPEED_HIGH; |
adc82f77 RR |
3100 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, |
3101 | EP0_HS_MAX_PACKET_SIZE); | |
3102 | } else { | |
1da177e4 | 3103 | dev->gadget.speed = USB_SPEED_FULL; |
adc82f77 RR |
3104 | usb_ep_set_maxpacket_limit(&dev->ep[0].ep, |
3105 | EP0_HS_MAX_PACKET_SIZE); | |
3106 | } | |
1da177e4 | 3107 | net2280_led_speed (dev, dev->gadget.speed); |
e538dfda | 3108 | DEBUG(dev, "%s\n", usb_speed_string(dev->gadget.speed)); |
1da177e4 LT |
3109 | } |
3110 | ||
3111 | ep = &dev->ep [0]; | |
3112 | ep->irqs++; | |
3113 | ||
3114 | /* make sure any leftover request state is cleared */ | |
3e76fdcb | 3115 | stat &= ~BIT(ENDPOINT_0_INTERRUPT); |
1da177e4 LT |
3116 | while (!list_empty (&ep->queue)) { |
3117 | req = list_entry (ep->queue.next, | |
3118 | struct net2280_request, queue); | |
3119 | done (ep, req, (req->req.actual == req->req.length) | |
3120 | ? 0 : -EPROTO); | |
3121 | } | |
3122 | ep->stopped = 0; | |
3123 | dev->protocol_stall = 0; | |
c2db8a8a | 3124 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 RR |
3125 | ep->is_halt = 0; |
3126 | else{ | |
3127 | if (ep->dev->pdev->device == 0x2280) | |
3e76fdcb RR |
3128 | tmp = BIT(FIFO_OVERFLOW) | |
3129 | BIT(FIFO_UNDERFLOW); | |
adc82f77 RR |
3130 | else |
3131 | tmp = 0; | |
3132 | ||
3e76fdcb RR |
3133 | writel(tmp | BIT(TIMEOUT) | |
3134 | BIT(USB_STALL_SENT) | | |
3135 | BIT(USB_IN_NAK_SENT) | | |
3136 | BIT(USB_IN_ACK_RCVD) | | |
3137 | BIT(USB_OUT_PING_NAK_SENT) | | |
3138 | BIT(USB_OUT_ACK_SENT) | | |
3139 | BIT(SHORT_PACKET_OUT_DONE_INTERRUPT) | | |
3140 | BIT(SHORT_PACKET_TRANSFERRED_INTERRUPT) | | |
3141 | BIT(DATA_PACKET_RECEIVED_INTERRUPT) | | |
3142 | BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | | |
3143 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
3144 | BIT(DATA_IN_TOKEN_INTERRUPT) | |
adc82f77 RR |
3145 | , &ep->regs->ep_stat); |
3146 | } | |
3147 | u.raw[0] = readl(&dev->usb->setup0123); | |
3148 | u.raw[1] = readl(&dev->usb->setup4567); | |
901b3d75 | 3149 | |
1da177e4 LT |
3150 | cpu_to_le32s (&u.raw [0]); |
3151 | cpu_to_le32s (&u.raw [1]); | |
3152 | ||
c2db8a8a | 3153 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 RR |
3154 | defect7374_workaround(dev, u.r); |
3155 | ||
950ee4c8 GL |
3156 | tmp = 0; |
3157 | ||
01ee7d70 DB |
3158 | #define w_value le16_to_cpu(u.r.wValue) |
3159 | #define w_index le16_to_cpu(u.r.wIndex) | |
3160 | #define w_length le16_to_cpu(u.r.wLength) | |
1da177e4 LT |
3161 | |
3162 | /* ack the irq */ | |
3e76fdcb RR |
3163 | writel(BIT(SETUP_PACKET_INTERRUPT), &dev->regs->irqstat0); |
3164 | stat ^= BIT(SETUP_PACKET_INTERRUPT); | |
1da177e4 LT |
3165 | |
3166 | /* watch control traffic at the token level, and force | |
3167 | * synchronization before letting the status stage happen. | |
3168 | * FIXME ignore tokens we'll NAK, until driver responds. | |
3169 | * that'll mean a lot less irqs for some drivers. | |
3170 | */ | |
3171 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; | |
3172 | if (ep->is_in) { | |
3e76fdcb RR |
3173 | scratch = BIT(DATA_PACKET_TRANSMITTED_INTERRUPT) | |
3174 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
3175 | BIT(DATA_IN_TOKEN_INTERRUPT); | |
1da177e4 LT |
3176 | stop_out_naking (ep); |
3177 | } else | |
3e76fdcb RR |
3178 | scratch = BIT(DATA_PACKET_RECEIVED_INTERRUPT) | |
3179 | BIT(DATA_OUT_PING_TOKEN_INTERRUPT) | | |
3180 | BIT(DATA_IN_TOKEN_INTERRUPT); | |
1da177e4 LT |
3181 | writel (scratch, &dev->epregs [0].ep_irqenb); |
3182 | ||
3183 | /* we made the hardware handle most lowlevel requests; | |
3184 | * everything else goes uplevel to the gadget code. | |
3185 | */ | |
1f26e28d | 3186 | ep->responded = 1; |
adc82f77 RR |
3187 | |
3188 | if (dev->gadget.speed == USB_SPEED_SUPER) { | |
3189 | handle_stat0_irqs_superspeed(dev, ep, u.r); | |
3190 | goto next_endpoints; | |
3191 | } | |
3192 | ||
1da177e4 LT |
3193 | switch (u.r.bRequest) { |
3194 | case USB_REQ_GET_STATUS: { | |
3195 | struct net2280_ep *e; | |
320f3459 | 3196 | __le32 status; |
1da177e4 LT |
3197 | |
3198 | /* hw handles device and interface status */ | |
3199 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) | |
3200 | goto delegate; | |
ad303db6 | 3201 | if ((e = get_ep_by_addr (dev, w_index)) == NULL |
320f3459 | 3202 | || w_length > 2) |
1da177e4 LT |
3203 | goto do_stall; |
3204 | ||
3e76fdcb | 3205 | if (readl(&e->regs->ep_rsp) & BIT(SET_ENDPOINT_HALT)) |
551509d2 | 3206 | status = cpu_to_le32 (1); |
1da177e4 | 3207 | else |
551509d2 | 3208 | status = cpu_to_le32 (0); |
1da177e4 LT |
3209 | |
3210 | /* don't bother with a request object! */ | |
3211 | writel (0, &dev->epregs [0].ep_irqenb); | |
320f3459 DB |
3212 | set_fifo_bytecount (ep, w_length); |
3213 | writel ((__force u32)status, &dev->epregs [0].ep_data); | |
1da177e4 LT |
3214 | allow_status (ep); |
3215 | VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status); | |
3216 | goto next_endpoints; | |
3217 | } | |
3218 | break; | |
3219 | case USB_REQ_CLEAR_FEATURE: { | |
3220 | struct net2280_ep *e; | |
3221 | ||
3222 | /* hw handles device features */ | |
3223 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
3224 | goto delegate; | |
320f3459 DB |
3225 | if (w_value != USB_ENDPOINT_HALT |
3226 | || w_length != 0) | |
1da177e4 | 3227 | goto do_stall; |
ad303db6 | 3228 | if ((e = get_ep_by_addr (dev, w_index)) == NULL) |
1da177e4 | 3229 | goto do_stall; |
8066134f AS |
3230 | if (e->wedged) { |
3231 | VDEBUG(dev, "%s wedged, halt not cleared\n", | |
3232 | ep->ep.name); | |
3233 | } else { | |
adc82f77 | 3234 | VDEBUG(dev, "%s clear halt\n", e->ep.name); |
8066134f | 3235 | clear_halt(e); |
c2db8a8a RR |
3236 | if (ep->dev->pdev->vendor == |
3237 | PCI_VENDOR_ID_PLX && | |
adc82f77 RR |
3238 | !list_empty(&e->queue) && e->td_dma) |
3239 | restart_dma(e); | |
8066134f | 3240 | } |
1da177e4 | 3241 | allow_status (ep); |
1da177e4 LT |
3242 | goto next_endpoints; |
3243 | } | |
3244 | break; | |
3245 | case USB_REQ_SET_FEATURE: { | |
3246 | struct net2280_ep *e; | |
3247 | ||
3248 | /* hw handles device features */ | |
3249 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) | |
3250 | goto delegate; | |
320f3459 DB |
3251 | if (w_value != USB_ENDPOINT_HALT |
3252 | || w_length != 0) | |
1da177e4 | 3253 | goto do_stall; |
ad303db6 | 3254 | if ((e = get_ep_by_addr (dev, w_index)) == NULL) |
1da177e4 | 3255 | goto do_stall; |
8066134f AS |
3256 | if (e->ep.name == ep0name) |
3257 | goto do_stall; | |
1da177e4 | 3258 | set_halt (e); |
c2db8a8a | 3259 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX && e->dma) |
adc82f77 | 3260 | abort_dma(e); |
1da177e4 LT |
3261 | allow_status (ep); |
3262 | VDEBUG (dev, "%s set halt\n", ep->ep.name); | |
3263 | goto next_endpoints; | |
3264 | } | |
3265 | break; | |
3266 | default: | |
3267 | delegate: | |
fec8de3a | 3268 | VDEBUG (dev, "setup %02x.%02x v%04x i%04x l%04x " |
1da177e4 LT |
3269 | "ep_cfg %08x\n", |
3270 | u.r.bRequestType, u.r.bRequest, | |
320f3459 | 3271 | w_value, w_index, w_length, |
adc82f77 | 3272 | readl(&ep->cfg->ep_cfg)); |
1f26e28d | 3273 | ep->responded = 0; |
1da177e4 LT |
3274 | spin_unlock (&dev->lock); |
3275 | tmp = dev->driver->setup (&dev->gadget, &u.r); | |
3276 | spin_lock (&dev->lock); | |
3277 | } | |
3278 | ||
3279 | /* stall ep0 on error */ | |
3280 | if (tmp < 0) { | |
3281 | do_stall: | |
3282 | VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n", | |
3283 | u.r.bRequestType, u.r.bRequest, tmp); | |
3284 | dev->protocol_stall = 1; | |
3285 | } | |
3286 | ||
3287 | /* some in/out token irq should follow; maybe stall then. | |
3288 | * driver must queue a request (even zlp) or halt ep0 | |
3289 | * before the host times out. | |
3290 | */ | |
3291 | } | |
3292 | ||
320f3459 DB |
3293 | #undef w_value |
3294 | #undef w_index | |
3295 | #undef w_length | |
3296 | ||
1da177e4 LT |
3297 | next_endpoints: |
3298 | /* endpoint data irq ? */ | |
3299 | scratch = stat & 0x7f; | |
3300 | stat &= ~0x7f; | |
3301 | for (num = 0; scratch; num++) { | |
3302 | u32 t; | |
3303 | ||
3304 | /* do this endpoint's FIFO and queue need tending? */ | |
3e76fdcb | 3305 | t = BIT(num); |
1da177e4 LT |
3306 | if ((scratch & t) == 0) |
3307 | continue; | |
3308 | scratch ^= t; | |
3309 | ||
3310 | ep = &dev->ep [num]; | |
3311 | handle_ep_small (ep); | |
3312 | } | |
3313 | ||
3314 | if (stat) | |
3315 | DEBUG (dev, "unhandled irqstat0 %08x\n", stat); | |
3316 | } | |
3317 | ||
3e76fdcb RR |
3318 | #define DMA_INTERRUPTS (BIT(DMA_D_INTERRUPT) | \ |
3319 | BIT(DMA_C_INTERRUPT) | \ | |
3320 | BIT(DMA_B_INTERRUPT) | \ | |
3321 | BIT(DMA_A_INTERRUPT)) | |
1da177e4 | 3322 | #define PCI_ERROR_INTERRUPTS ( \ |
3e76fdcb RR |
3323 | BIT(PCI_MASTER_ABORT_RECEIVED_INTERRUPT) | \ |
3324 | BIT(PCI_TARGET_ABORT_RECEIVED_INTERRUPT) | \ | |
3325 | BIT(PCI_RETRY_ABORT_INTERRUPT)) | |
1da177e4 LT |
3326 | |
3327 | static void handle_stat1_irqs (struct net2280 *dev, u32 stat) | |
3328 | { | |
3329 | struct net2280_ep *ep; | |
3330 | u32 tmp, num, mask, scratch; | |
3331 | ||
3332 | /* after disconnect there's nothing else to do! */ | |
3e76fdcb RR |
3333 | tmp = BIT(VBUS_INTERRUPT) | BIT(ROOT_PORT_RESET_INTERRUPT); |
3334 | mask = BIT(SUPER_SPEED) | BIT(HIGH_SPEED) | BIT(FULL_SPEED); | |
1da177e4 LT |
3335 | |
3336 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. | |
fb914ebf | 3337 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRUPT set and |
901b3d75 | 3338 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
1da177e4 LT |
3339 | * only indicates a change in the reset state). |
3340 | */ | |
3341 | if (stat & tmp) { | |
3342 | writel (tmp, &dev->regs->irqstat1); | |
3e76fdcb | 3343 | if ((((stat & BIT(ROOT_PORT_RESET_INTERRUPT)) |
901b3d75 DB |
3344 | && ((readl (&dev->usb->usbstat) & mask) |
3345 | == 0)) | |
3346 | || ((readl (&dev->usb->usbctl) | |
3e76fdcb | 3347 | & BIT(VBUS_PIN)) == 0) |
1da177e4 LT |
3348 | ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) { |
3349 | DEBUG (dev, "disconnect %s\n", | |
3350 | dev->driver->driver.name); | |
3351 | stop_activity (dev, dev->driver); | |
3352 | ep0_start (dev); | |
3353 | return; | |
3354 | } | |
3355 | stat &= ~tmp; | |
3356 | ||
3357 | /* vBUS can bounce ... one of many reasons to ignore the | |
3358 | * notion of hotplug events on bus connect/disconnect! | |
3359 | */ | |
3360 | if (!stat) | |
3361 | return; | |
3362 | } | |
3363 | ||
3364 | /* NOTE: chip stays in PCI D0 state for now, but it could | |
3365 | * enter D1 to save more power | |
3366 | */ | |
3e76fdcb | 3367 | tmp = BIT(SUSPEND_REQUEST_CHANGE_INTERRUPT); |
1da177e4 LT |
3368 | if (stat & tmp) { |
3369 | writel (tmp, &dev->regs->irqstat1); | |
3e76fdcb | 3370 | if (stat & BIT(SUSPEND_REQUEST_INTERRUPT)) { |
1da177e4 LT |
3371 | if (dev->driver->suspend) |
3372 | dev->driver->suspend (&dev->gadget); | |
3373 | if (!enable_suspend) | |
3e76fdcb | 3374 | stat &= ~BIT(SUSPEND_REQUEST_INTERRUPT); |
1da177e4 LT |
3375 | } else { |
3376 | if (dev->driver->resume) | |
3377 | dev->driver->resume (&dev->gadget); | |
3378 | /* at high speed, note erratum 0133 */ | |
3379 | } | |
3380 | stat &= ~tmp; | |
3381 | } | |
3382 | ||
3383 | /* clear any other status/irqs */ | |
3384 | if (stat) | |
3385 | writel (stat, &dev->regs->irqstat1); | |
3386 | ||
3387 | /* some status we can just ignore */ | |
950ee4c8 | 3388 | if (dev->pdev->device == 0x2280) |
3e76fdcb RR |
3389 | stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | |
3390 | BIT(SUSPEND_REQUEST_INTERRUPT) | | |
3391 | BIT(RESUME_INTERRUPT) | | |
3392 | BIT(SOF_INTERRUPT)); | |
950ee4c8 | 3393 | else |
3e76fdcb RR |
3394 | stat &= ~(BIT(CONTROL_STATUS_INTERRUPT) | |
3395 | BIT(RESUME_INTERRUPT) | | |
3396 | BIT(SOF_DOWN_INTERRUPT) | | |
3397 | BIT(SOF_INTERRUPT)); | |
950ee4c8 | 3398 | |
1da177e4 LT |
3399 | if (!stat) |
3400 | return; | |
3401 | // DEBUG (dev, "irqstat1 %08x\n", stat); | |
3402 | ||
3403 | /* DMA status, for ep-{a,b,c,d} */ | |
3404 | scratch = stat & DMA_INTERRUPTS; | |
3405 | stat &= ~DMA_INTERRUPTS; | |
3406 | scratch >>= 9; | |
3407 | for (num = 0; scratch; num++) { | |
3408 | struct net2280_dma_regs __iomem *dma; | |
3409 | ||
3e76fdcb | 3410 | tmp = BIT(num); |
1da177e4 LT |
3411 | if ((tmp & scratch) == 0) |
3412 | continue; | |
3413 | scratch ^= tmp; | |
3414 | ||
3415 | ep = &dev->ep [num + 1]; | |
3416 | dma = ep->dma; | |
3417 | ||
3418 | if (!dma) | |
3419 | continue; | |
3420 | ||
3421 | /* clear ep's dma status */ | |
3422 | tmp = readl (&dma->dmastat); | |
3423 | writel (tmp, &dma->dmastat); | |
3424 | ||
adc82f77 | 3425 | /* dma sync*/ |
c2db8a8a | 3426 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) { |
adc82f77 RR |
3427 | u32 r_dmacount = readl(&dma->dmacount); |
3428 | if (!ep->is_in && (r_dmacount & 0x00FFFFFF) && | |
3e76fdcb | 3429 | (tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) |
adc82f77 RR |
3430 | continue; |
3431 | } | |
3432 | ||
1da177e4 LT |
3433 | /* chaining should stop on abort, short OUT from fifo, |
3434 | * or (stat0 codepath) short OUT transfer. | |
3435 | */ | |
3436 | if (!use_dma_chaining) { | |
3e76fdcb | 3437 | if (!(tmp & BIT(DMA_TRANSACTION_DONE_INTERRUPT))) { |
1da177e4 LT |
3438 | DEBUG (ep->dev, "%s no xact done? %08x\n", |
3439 | ep->ep.name, tmp); | |
3440 | continue; | |
3441 | } | |
3442 | stop_dma (ep->dma); | |
3443 | } | |
3444 | ||
3445 | /* OUT transfers terminate when the data from the | |
3446 | * host is in our memory. Process whatever's done. | |
3447 | * On this path, we know transfer's last packet wasn't | |
3448 | * less than req->length. NAK_OUT_PACKETS may be set, | |
3449 | * or the FIFO may already be holding new packets. | |
3450 | * | |
3451 | * IN transfers can linger in the FIFO for a very | |
3452 | * long time ... we ignore that for now, accounting | |
3453 | * precisely (like PIO does) needs per-packet irqs | |
3454 | */ | |
3455 | scan_dma_completions (ep); | |
3456 | ||
3457 | /* disable dma on inactive queues; else maybe restart */ | |
3458 | if (list_empty (&ep->queue)) { | |
3459 | if (use_dma_chaining) | |
3460 | stop_dma (ep->dma); | |
3461 | } else { | |
3462 | tmp = readl (&dma->dmactl); | |
3e76fdcb | 3463 | if (!use_dma_chaining || (tmp & BIT(DMA_ENABLE)) == 0) |
1da177e4 LT |
3464 | restart_dma (ep); |
3465 | else if (ep->is_in && use_dma_chaining) { | |
3466 | struct net2280_request *req; | |
320f3459 | 3467 | __le32 dmacount; |
1da177e4 LT |
3468 | |
3469 | /* the descriptor at the head of the chain | |
3470 | * may still have VALID_BIT clear; that's | |
3471 | * used to trigger changing DMA_FIFO_VALIDATE | |
3472 | * (affects automagic zlp writes). | |
3473 | */ | |
3474 | req = list_entry (ep->queue.next, | |
3475 | struct net2280_request, queue); | |
3476 | dmacount = req->td->dmacount; | |
3e76fdcb RR |
3477 | dmacount &= cpu_to_le32(BIT(VALID_BIT) | |
3478 | DMA_BYTE_COUNT_MASK); | |
1da177e4 LT |
3479 | if (dmacount && (dmacount & valid_bit) == 0) |
3480 | restart_dma (ep); | |
3481 | } | |
3482 | } | |
3483 | ep->irqs++; | |
3484 | } | |
3485 | ||
3486 | /* NOTE: there are other PCI errors we might usefully notice. | |
3487 | * if they appear very often, here's where to try recovering. | |
3488 | */ | |
3489 | if (stat & PCI_ERROR_INTERRUPTS) { | |
3490 | ERROR (dev, "pci dma error; stat %08x\n", stat); | |
3491 | stat &= ~PCI_ERROR_INTERRUPTS; | |
3492 | /* these are fatal errors, but "maybe" they won't | |
3493 | * happen again ... | |
3494 | */ | |
3495 | stop_activity (dev, dev->driver); | |
3496 | ep0_start (dev); | |
3497 | stat = 0; | |
3498 | } | |
3499 | ||
3500 | if (stat) | |
3501 | DEBUG (dev, "unhandled irqstat1 %08x\n", stat); | |
3502 | } | |
3503 | ||
7d12e780 | 3504 | static irqreturn_t net2280_irq (int irq, void *_dev) |
1da177e4 LT |
3505 | { |
3506 | struct net2280 *dev = _dev; | |
3507 | ||
658ad5e0 | 3508 | /* shared interrupt, not ours */ |
c2db8a8a | 3509 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY && |
3e76fdcb | 3510 | (!(readl(&dev->regs->irqstat0) & BIT(INTA_ASSERTED)))) |
658ad5e0 AS |
3511 | return IRQ_NONE; |
3512 | ||
1da177e4 LT |
3513 | spin_lock (&dev->lock); |
3514 | ||
3515 | /* handle disconnect, dma, and more */ | |
3516 | handle_stat1_irqs (dev, readl (&dev->regs->irqstat1)); | |
3517 | ||
3518 | /* control requests and PIO */ | |
3519 | handle_stat0_irqs (dev, readl (&dev->regs->irqstat0)); | |
3520 | ||
c2db8a8a | 3521 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) { |
adc82f77 RR |
3522 | /* re-enable interrupt to trigger any possible new interrupt */ |
3523 | u32 pciirqenb1 = readl(&dev->regs->pciirqenb1); | |
3524 | writel(pciirqenb1 & 0x7FFFFFFF, &dev->regs->pciirqenb1); | |
3525 | writel(pciirqenb1, &dev->regs->pciirqenb1); | |
3526 | } | |
3527 | ||
1da177e4 LT |
3528 | spin_unlock (&dev->lock); |
3529 | ||
3530 | return IRQ_HANDLED; | |
3531 | } | |
3532 | ||
3533 | /*-------------------------------------------------------------------------*/ | |
3534 | ||
3535 | static void gadget_release (struct device *_dev) | |
3536 | { | |
3537 | struct net2280 *dev = dev_get_drvdata (_dev); | |
3538 | ||
3539 | kfree (dev); | |
3540 | } | |
3541 | ||
3542 | /* tear down the binding between this driver and the pci device */ | |
3543 | ||
3544 | static void net2280_remove (struct pci_dev *pdev) | |
3545 | { | |
3546 | struct net2280 *dev = pci_get_drvdata (pdev); | |
3547 | ||
0f91349b SAS |
3548 | usb_del_gadget_udc(&dev->gadget); |
3549 | ||
6bea476c | 3550 | BUG_ON(dev->driver); |
1da177e4 LT |
3551 | |
3552 | /* then clean up the resources we allocated during probe() */ | |
3553 | net2280_led_shutdown (dev); | |
3554 | if (dev->requests) { | |
3555 | int i; | |
3556 | for (i = 1; i < 5; i++) { | |
3557 | if (!dev->ep [i].dummy) | |
3558 | continue; | |
3559 | pci_pool_free (dev->requests, dev->ep [i].dummy, | |
3560 | dev->ep [i].td_dma); | |
3561 | } | |
3562 | pci_pool_destroy (dev->requests); | |
3563 | } | |
3564 | if (dev->got_irq) | |
3565 | free_irq (pdev->irq, dev); | |
c2db8a8a | 3566 | if (use_msi && dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 | 3567 | pci_disable_msi(pdev); |
1da177e4 LT |
3568 | if (dev->regs) |
3569 | iounmap (dev->regs); | |
3570 | if (dev->region) | |
3571 | release_mem_region (pci_resource_start (pdev, 0), | |
3572 | pci_resource_len (pdev, 0)); | |
3573 | if (dev->enabled) | |
3574 | pci_disable_device (pdev); | |
1da177e4 | 3575 | device_remove_file (&pdev->dev, &dev_attr_registers); |
1da177e4 LT |
3576 | |
3577 | INFO (dev, "unbind\n"); | |
1da177e4 LT |
3578 | } |
3579 | ||
3580 | /* wrap this driver around the specified device, but | |
3581 | * don't respond over USB until a gadget driver binds to us. | |
3582 | */ | |
3583 | ||
3584 | static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id) | |
3585 | { | |
3586 | struct net2280 *dev; | |
3587 | unsigned long resource, len; | |
3588 | void __iomem *base = NULL; | |
3589 | int retval, i; | |
1da177e4 | 3590 | |
1da177e4 | 3591 | /* alloc, and start init */ |
e94b1766 | 3592 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
1da177e4 LT |
3593 | if (dev == NULL){ |
3594 | retval = -ENOMEM; | |
3595 | goto done; | |
3596 | } | |
3597 | ||
9fb81ce6 | 3598 | pci_set_drvdata (pdev, dev); |
1da177e4 LT |
3599 | spin_lock_init (&dev->lock); |
3600 | dev->pdev = pdev; | |
3601 | dev->gadget.ops = &net2280_ops; | |
c2db8a8a | 3602 | dev->gadget.max_speed = (dev->pdev->vendor == PCI_VENDOR_ID_PLX) ? |
adc82f77 | 3603 | USB_SPEED_SUPER : USB_SPEED_HIGH; |
1da177e4 LT |
3604 | |
3605 | /* the "gadget" abstracts/virtualizes the controller */ | |
1da177e4 LT |
3606 | dev->gadget.name = driver_name; |
3607 | ||
3608 | /* now all the pci goodies ... */ | |
3609 | if (pci_enable_device (pdev) < 0) { | |
901b3d75 | 3610 | retval = -ENODEV; |
1da177e4 LT |
3611 | goto done; |
3612 | } | |
3613 | dev->enabled = 1; | |
3614 | ||
3615 | /* BAR 0 holds all the registers | |
3616 | * BAR 1 is 8051 memory; unused here (note erratum 0103) | |
3617 | * BAR 2 is fifo memory; unused here | |
3618 | */ | |
3619 | resource = pci_resource_start (pdev, 0); | |
3620 | len = pci_resource_len (pdev, 0); | |
3621 | if (!request_mem_region (resource, len, driver_name)) { | |
3622 | DEBUG (dev, "controller already in use\n"); | |
3623 | retval = -EBUSY; | |
3624 | goto done; | |
3625 | } | |
3626 | dev->region = 1; | |
3627 | ||
901b3d75 DB |
3628 | /* FIXME provide firmware download interface to put |
3629 | * 8051 code into the chip, e.g. to turn on PCI PM. | |
3630 | */ | |
3631 | ||
1da177e4 LT |
3632 | base = ioremap_nocache (resource, len); |
3633 | if (base == NULL) { | |
3634 | DEBUG (dev, "can't map memory\n"); | |
3635 | retval = -EFAULT; | |
3636 | goto done; | |
3637 | } | |
3638 | dev->regs = (struct net2280_regs __iomem *) base; | |
3639 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); | |
3640 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); | |
3641 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); | |
3642 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); | |
3643 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); | |
3644 | ||
c2db8a8a | 3645 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX) { |
adc82f77 RR |
3646 | u32 fsmvalue; |
3647 | u32 usbstat; | |
3648 | dev->usb_ext = (struct usb338x_usb_ext_regs __iomem *) | |
3649 | (base + 0x00b4); | |
3650 | dev->fiforegs = (struct usb338x_fifo_regs __iomem *) | |
3651 | (base + 0x0500); | |
3652 | dev->llregs = (struct usb338x_ll_regs __iomem *) | |
3653 | (base + 0x0700); | |
3654 | dev->ll_lfps_regs = (struct usb338x_ll_lfps_regs __iomem *) | |
3655 | (base + 0x0748); | |
3656 | dev->ll_tsn_regs = (struct usb338x_ll_tsn_regs __iomem *) | |
3657 | (base + 0x077c); | |
3658 | dev->ll_chicken_reg = (struct usb338x_ll_chi_regs __iomem *) | |
3659 | (base + 0x079c); | |
3660 | dev->plregs = (struct usb338x_pl_regs __iomem *) | |
3661 | (base + 0x0800); | |
3662 | usbstat = readl(&dev->usb->usbstat); | |
3e76fdcb | 3663 | dev->enhanced_mode = (usbstat & BIT(11)) ? 1 : 0; |
adc82f77 RR |
3664 | dev->n_ep = (dev->enhanced_mode) ? 9 : 5; |
3665 | /* put into initial config, link up all endpoints */ | |
3666 | fsmvalue = get_idx_reg(dev->regs, SCRATCH) & | |
3667 | (0xf << DEFECT7374_FSM_FIELD); | |
3668 | /* See if firmware needs to set up for workaround: */ | |
3669 | if (fsmvalue == DEFECT7374_FSM_SS_CONTROL_READ) | |
3670 | writel(0, &dev->usb->usbctl); | |
3671 | } else{ | |
3672 | dev->enhanced_mode = 0; | |
3673 | dev->n_ep = 7; | |
3674 | /* put into initial config, link up all endpoints */ | |
3675 | writel(0, &dev->usb->usbctl); | |
3676 | } | |
3677 | ||
1da177e4 LT |
3678 | usb_reset (dev); |
3679 | usb_reinit (dev); | |
3680 | ||
3681 | /* irq setup after old hardware is cleaned up */ | |
3682 | if (!pdev->irq) { | |
3683 | ERROR (dev, "No IRQ. Check PCI setup!\n"); | |
3684 | retval = -ENODEV; | |
3685 | goto done; | |
3686 | } | |
c6387a48 | 3687 | |
c2db8a8a | 3688 | if (use_msi && dev->pdev->vendor == PCI_VENDOR_ID_PLX) |
adc82f77 RR |
3689 | if (pci_enable_msi(pdev)) |
3690 | ERROR(dev, "Failed to enable MSI mode\n"); | |
3691 | ||
d54b5caa | 3692 | if (request_irq (pdev->irq, net2280_irq, IRQF_SHARED, driver_name, dev) |
1da177e4 | 3693 | != 0) { |
c6387a48 | 3694 | ERROR (dev, "request interrupt %d failed\n", pdev->irq); |
1da177e4 LT |
3695 | retval = -EBUSY; |
3696 | goto done; | |
3697 | } | |
3698 | dev->got_irq = 1; | |
3699 | ||
3700 | /* DMA setup */ | |
3701 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ | |
3702 | dev->requests = pci_pool_create ("requests", pdev, | |
3703 | sizeof (struct net2280_dma), | |
3704 | 0 /* no alignment requirements */, | |
3705 | 0 /* or page-crossing issues */); | |
3706 | if (!dev->requests) { | |
3707 | DEBUG (dev, "can't get request pool\n"); | |
3708 | retval = -ENOMEM; | |
3709 | goto done; | |
3710 | } | |
3711 | for (i = 1; i < 5; i++) { | |
3712 | struct net2280_dma *td; | |
3713 | ||
3714 | td = pci_pool_alloc (dev->requests, GFP_KERNEL, | |
3715 | &dev->ep [i].td_dma); | |
3716 | if (!td) { | |
3717 | DEBUG (dev, "can't get dummy %d\n", i); | |
3718 | retval = -ENOMEM; | |
3719 | goto done; | |
3720 | } | |
3721 | td->dmacount = 0; /* not VALID */ | |
1da177e4 LT |
3722 | td->dmadesc = td->dmaaddr; |
3723 | dev->ep [i].dummy = td; | |
3724 | } | |
3725 | ||
3726 | /* enable lower-overhead pci memory bursts during DMA */ | |
c2db8a8a | 3727 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
3e76fdcb RR |
3728 | writel(BIT(DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) | |
3729 | /* | |
3730 | * 256 write retries may not be enough... | |
3731 | BIT(PCI_RETRY_ABORT_ENABLE) | | |
3732 | */ | |
3733 | BIT(DMA_READ_MULTIPLE_ENABLE) | | |
3734 | BIT(DMA_READ_LINE_ENABLE), | |
3735 | &dev->pci->pcimstctl); | |
1da177e4 LT |
3736 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ |
3737 | pci_set_master (pdev); | |
694625c0 | 3738 | pci_try_set_mwi (pdev); |
1da177e4 LT |
3739 | |
3740 | /* ... also flushes any posted pci writes */ | |
3741 | dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff; | |
3742 | ||
3743 | /* done */ | |
1da177e4 | 3744 | INFO (dev, "%s\n", driver_desc); |
c6387a48 DM |
3745 | INFO (dev, "irq %d, pci mem %p, chip rev %04x\n", |
3746 | pdev->irq, base, dev->chiprev); | |
adc82f77 RR |
3747 | INFO(dev, "version: " DRIVER_VERSION "; dma %s %s\n", |
3748 | use_dma ? (use_dma_chaining ? "chaining" : "enabled") | |
3749 | : "disabled", | |
3750 | dev->enhanced_mode ? "enhanced mode" : "legacy mode"); | |
b3899dac JG |
3751 | retval = device_create_file (&pdev->dev, &dev_attr_registers); |
3752 | if (retval) goto done; | |
1da177e4 | 3753 | |
2901df68 FB |
3754 | retval = usb_add_gadget_udc_release(&pdev->dev, &dev->gadget, |
3755 | gadget_release); | |
0f91349b SAS |
3756 | if (retval) |
3757 | goto done; | |
1da177e4 LT |
3758 | return 0; |
3759 | ||
3760 | done: | |
3761 | if (dev) | |
3762 | net2280_remove (pdev); | |
3763 | return retval; | |
3764 | } | |
3765 | ||
2d61bde7 AS |
3766 | /* make sure the board is quiescent; otherwise it will continue |
3767 | * generating IRQs across the upcoming reboot. | |
3768 | */ | |
3769 | ||
3770 | static void net2280_shutdown (struct pci_dev *pdev) | |
3771 | { | |
3772 | struct net2280 *dev = pci_get_drvdata (pdev); | |
3773 | ||
3774 | /* disable IRQs */ | |
3775 | writel (0, &dev->regs->pciirqenb0); | |
3776 | writel (0, &dev->regs->pciirqenb1); | |
3777 | ||
3778 | /* disable the pullup so the host will think we're gone */ | |
3779 | writel (0, &dev->usb->usbctl); | |
2f076077 AS |
3780 | |
3781 | /* Disable full-speed test mode */ | |
c2db8a8a | 3782 | if (dev->pdev->vendor == PCI_VENDOR_ID_PLX_LEGACY) |
adc82f77 | 3783 | writel(0, &dev->usb->xcvrdiag); |
2d61bde7 AS |
3784 | } |
3785 | ||
1da177e4 LT |
3786 | |
3787 | /*-------------------------------------------------------------------------*/ | |
3788 | ||
901b3d75 DB |
3789 | static const struct pci_device_id pci_ids [] = { { |
3790 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
3791 | .class_mask = ~0, | |
c2db8a8a | 3792 | .vendor = PCI_VENDOR_ID_PLX_LEGACY, |
1da177e4 LT |
3793 | .device = 0x2280, |
3794 | .subvendor = PCI_ANY_ID, | |
3795 | .subdevice = PCI_ANY_ID, | |
950ee4c8 | 3796 | }, { |
901b3d75 DB |
3797 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
3798 | .class_mask = ~0, | |
c2db8a8a | 3799 | .vendor = PCI_VENDOR_ID_PLX_LEGACY, |
950ee4c8 GL |
3800 | .device = 0x2282, |
3801 | .subvendor = PCI_ANY_ID, | |
3802 | .subdevice = PCI_ANY_ID, | |
adc82f77 RR |
3803 | }, |
3804 | { | |
3805 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
3806 | .class_mask = ~0, | |
c2db8a8a | 3807 | .vendor = PCI_VENDOR_ID_PLX, |
adc82f77 RR |
3808 | .device = 0x3380, |
3809 | .subvendor = PCI_ANY_ID, | |
3810 | .subdevice = PCI_ANY_ID, | |
3811 | }, | |
3812 | { | |
3813 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), | |
3814 | .class_mask = ~0, | |
c2db8a8a | 3815 | .vendor = PCI_VENDOR_ID_PLX, |
adc82f77 RR |
3816 | .device = 0x3382, |
3817 | .subvendor = PCI_ANY_ID, | |
3818 | .subdevice = PCI_ANY_ID, | |
3819 | }, | |
3820 | { /* end: all zeroes */ } | |
1da177e4 LT |
3821 | }; |
3822 | MODULE_DEVICE_TABLE (pci, pci_ids); | |
3823 | ||
3824 | /* pci driver glue; this is a "new style" PCI driver module */ | |
3825 | static struct pci_driver net2280_pci_driver = { | |
3826 | .name = (char *) driver_name, | |
3827 | .id_table = pci_ids, | |
3828 | ||
3829 | .probe = net2280_probe, | |
3830 | .remove = net2280_remove, | |
2d61bde7 | 3831 | .shutdown = net2280_shutdown, |
1da177e4 LT |
3832 | |
3833 | /* FIXME add power management support */ | |
3834 | }; | |
3835 | ||
3836 | MODULE_DESCRIPTION (DRIVER_DESC); | |
3837 | MODULE_AUTHOR ("David Brownell"); | |
3838 | MODULE_LICENSE ("GPL"); | |
3839 | ||
3840 | static int __init init (void) | |
3841 | { | |
3842 | if (!use_dma) | |
3843 | use_dma_chaining = 0; | |
3844 | return pci_register_driver (&net2280_pci_driver); | |
3845 | } | |
3846 | module_init (init); | |
3847 | ||
3848 | static void __exit cleanup (void) | |
3849 | { | |
3850 | pci_unregister_driver (&net2280_pci_driver); | |
3851 | } | |
3852 | module_exit (cleanup); |