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55d402d8 TD |
1 | /* |
2 | * amd5536.c -- AMD 5536 UDC high/full speed USB device controller | |
3 | * | |
4 | * Copyright (C) 2005-2007 AMD (http://www.amd.com) | |
5 | * Author: Thomas Dahlmann | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
55d402d8 TD |
11 | */ |
12 | ||
13 | /* | |
14 | * The AMD5536 UDC is part of the x86 southbridge AMD Geode CS5536. | |
15 | * It is a USB Highspeed DMA capable USB device controller. Beside ep0 it | |
16 | * provides 4 IN and 4 OUT endpoints (bulk or interrupt type). | |
17 | * | |
18 | * Make sure that UDC is assigned to port 4 by BIOS settings (port can also | |
19 | * be used as host port) and UOC bits PAD_EN and APU are set (should be done | |
20 | * by BIOS init). | |
21 | * | |
22 | * UDC DMA requires 32-bit aligned buffers so DMA with gadget ether does not | |
23 | * work without updating NET_IP_ALIGN. Or PIO mode (module param "use_dma=0") | |
24 | * can be used with gadget ether. | |
25 | */ | |
26 | ||
27 | /* debug control */ | |
28 | /* #define UDC_VERBOSE */ | |
29 | ||
30 | /* Driver strings */ | |
31 | #define UDC_MOD_DESCRIPTION "AMD 5536 UDC - USB Device Controller" | |
c15e03e1 | 32 | #define UDC_DRIVER_VERSION_STRING "01.00.0206" |
55d402d8 TD |
33 | |
34 | /* system */ | |
35 | #include <linux/module.h> | |
36 | #include <linux/pci.h> | |
37 | #include <linux/kernel.h> | |
55d402d8 TD |
38 | #include <linux/delay.h> |
39 | #include <linux/ioport.h> | |
40 | #include <linux/sched.h> | |
41 | #include <linux/slab.h> | |
55d402d8 TD |
42 | #include <linux/errno.h> |
43 | #include <linux/init.h> | |
44 | #include <linux/timer.h> | |
45 | #include <linux/list.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/ioctl.h> | |
48 | #include <linux/fs.h> | |
49 | #include <linux/dmapool.h> | |
50 | #include <linux/moduleparam.h> | |
51 | #include <linux/device.h> | |
52 | #include <linux/io.h> | |
53 | #include <linux/irq.h> | |
b38b03b3 | 54 | #include <linux/prefetch.h> |
55d402d8 TD |
55 | |
56 | #include <asm/byteorder.h> | |
55d402d8 TD |
57 | #include <asm/unaligned.h> |
58 | ||
59 | /* gadget stack */ | |
60 | #include <linux/usb/ch9.h> | |
9454a57a | 61 | #include <linux/usb/gadget.h> |
55d402d8 TD |
62 | |
63 | /* udc specific */ | |
64 | #include "amd5536udc.h" | |
65 | ||
66 | ||
67 | static void udc_tasklet_disconnect(unsigned long); | |
68 | static void empty_req_queue(struct udc_ep *); | |
69 | static int udc_probe(struct udc *dev); | |
70 | static void udc_basic_init(struct udc *dev); | |
71 | static void udc_setup_endpoints(struct udc *dev); | |
72 | static void udc_soft_reset(struct udc *dev); | |
73 | static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep); | |
74 | static void udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq); | |
75 | static int udc_free_dma_chain(struct udc *dev, struct udc_request *req); | |
76 | static int udc_create_dma_chain(struct udc_ep *ep, struct udc_request *req, | |
77 | unsigned long buf_len, gfp_t gfp_flags); | |
78 | static int udc_remote_wakeup(struct udc *dev); | |
79 | static int udc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); | |
80 | static void udc_pci_remove(struct pci_dev *pdev); | |
81 | ||
82 | /* description */ | |
83 | static const char mod_desc[] = UDC_MOD_DESCRIPTION; | |
84 | static const char name[] = "amd5536udc"; | |
85 | ||
86 | /* structure to hold endpoint function pointers */ | |
87 | static const struct usb_ep_ops udc_ep_ops; | |
88 | ||
89 | /* received setup data */ | |
90 | static union udc_setup_data setup_data; | |
91 | ||
92 | /* pointer to device object */ | |
93 | static struct udc *udc; | |
94 | ||
95 | /* irq spin lock for soft reset */ | |
96 | static DEFINE_SPINLOCK(udc_irq_spinlock); | |
97 | /* stall spin lock */ | |
98 | static DEFINE_SPINLOCK(udc_stall_spinlock); | |
99 | ||
100 | /* | |
101 | * slave mode: pending bytes in rx fifo after nyet, | |
102 | * used if EPIN irq came but no req was available | |
103 | */ | |
104 | static unsigned int udc_rxfifo_pending; | |
105 | ||
106 | /* count soft resets after suspend to avoid loop */ | |
107 | static int soft_reset_occured; | |
108 | static int soft_reset_after_usbreset_occured; | |
109 | ||
110 | /* timer */ | |
111 | static struct timer_list udc_timer; | |
112 | static int stop_timer; | |
113 | ||
114 | /* set_rde -- Is used to control enabling of RX DMA. Problem is | |
115 | * that UDC has only one bit (RDE) to enable/disable RX DMA for | |
116 | * all OUT endpoints. So we have to handle race conditions like | |
117 | * when OUT data reaches the fifo but no request was queued yet. | |
118 | * This cannot be solved by letting the RX DMA disabled until a | |
119 | * request gets queued because there may be other OUT packets | |
120 | * in the FIFO (important for not blocking control traffic). | |
121 | * The value of set_rde controls the correspondig timer. | |
122 | * | |
123 | * set_rde -1 == not used, means it is alloed to be set to 0 or 1 | |
124 | * set_rde 0 == do not touch RDE, do no start the RDE timer | |
125 | * set_rde 1 == timer function will look whether FIFO has data | |
126 | * set_rde 2 == set by timer function to enable RX DMA on next call | |
127 | */ | |
128 | static int set_rde = -1; | |
129 | ||
130 | static DECLARE_COMPLETION(on_exit); | |
131 | static struct timer_list udc_pollstall_timer; | |
132 | static int stop_pollstall_timer; | |
133 | static DECLARE_COMPLETION(on_pollstall_exit); | |
134 | ||
135 | /* tasklet for usb disconnect */ | |
136 | static DECLARE_TASKLET(disconnect_tasklet, udc_tasklet_disconnect, | |
137 | (unsigned long) &udc); | |
138 | ||
139 | ||
140 | /* endpoint names used for print */ | |
141 | static const char ep0_string[] = "ep0in"; | |
34af3738 | 142 | static const char *const ep_string[] = { |
55d402d8 TD |
143 | ep0_string, |
144 | "ep1in-int", "ep2in-bulk", "ep3in-bulk", "ep4in-bulk", "ep5in-bulk", | |
145 | "ep6in-bulk", "ep7in-bulk", "ep8in-bulk", "ep9in-bulk", "ep10in-bulk", | |
146 | "ep11in-bulk", "ep12in-bulk", "ep13in-bulk", "ep14in-bulk", | |
147 | "ep15in-bulk", "ep0out", "ep1out-bulk", "ep2out-bulk", "ep3out-bulk", | |
148 | "ep4out-bulk", "ep5out-bulk", "ep6out-bulk", "ep7out-bulk", | |
149 | "ep8out-bulk", "ep9out-bulk", "ep10out-bulk", "ep11out-bulk", | |
150 | "ep12out-bulk", "ep13out-bulk", "ep14out-bulk", "ep15out-bulk" | |
151 | }; | |
152 | ||
153 | /* DMA usage flag */ | |
90ab5ee9 | 154 | static bool use_dma = 1; |
55d402d8 | 155 | /* packet per buffer dma */ |
90ab5ee9 | 156 | static bool use_dma_ppb = 1; |
55d402d8 | 157 | /* with per descr. update */ |
90ab5ee9 | 158 | static bool use_dma_ppb_du; |
55d402d8 TD |
159 | /* buffer fill mode */ |
160 | static int use_dma_bufferfill_mode; | |
161 | /* full speed only mode */ | |
90ab5ee9 | 162 | static bool use_fullspeed; |
55d402d8 TD |
163 | /* tx buffer size for high speed */ |
164 | static unsigned long hs_tx_buf = UDC_EPIN_BUFF_SIZE; | |
165 | ||
166 | /* module parameters */ | |
167 | module_param(use_dma, bool, S_IRUGO); | |
168 | MODULE_PARM_DESC(use_dma, "true for DMA"); | |
169 | module_param(use_dma_ppb, bool, S_IRUGO); | |
170 | MODULE_PARM_DESC(use_dma_ppb, "true for DMA in packet per buffer mode"); | |
171 | module_param(use_dma_ppb_du, bool, S_IRUGO); | |
172 | MODULE_PARM_DESC(use_dma_ppb_du, | |
173 | "true for DMA in packet per buffer mode with descriptor update"); | |
174 | module_param(use_fullspeed, bool, S_IRUGO); | |
175 | MODULE_PARM_DESC(use_fullspeed, "true for fullspeed only"); | |
176 | ||
177 | /*---------------------------------------------------------------------------*/ | |
178 | /* Prints UDC device registers and endpoint irq registers */ | |
179 | static void print_regs(struct udc *dev) | |
180 | { | |
181 | DBG(dev, "------- Device registers -------\n"); | |
182 | DBG(dev, "dev config = %08x\n", readl(&dev->regs->cfg)); | |
183 | DBG(dev, "dev control = %08x\n", readl(&dev->regs->ctl)); | |
184 | DBG(dev, "dev status = %08x\n", readl(&dev->regs->sts)); | |
185 | DBG(dev, "\n"); | |
186 | DBG(dev, "dev int's = %08x\n", readl(&dev->regs->irqsts)); | |
187 | DBG(dev, "dev intmask = %08x\n", readl(&dev->regs->irqmsk)); | |
188 | DBG(dev, "\n"); | |
189 | DBG(dev, "dev ep int's = %08x\n", readl(&dev->regs->ep_irqsts)); | |
190 | DBG(dev, "dev ep intmask = %08x\n", readl(&dev->regs->ep_irqmsk)); | |
191 | DBG(dev, "\n"); | |
192 | DBG(dev, "USE DMA = %d\n", use_dma); | |
193 | if (use_dma && use_dma_ppb && !use_dma_ppb_du) { | |
194 | DBG(dev, "DMA mode = PPBNDU (packet per buffer " | |
195 | "WITHOUT desc. update)\n"); | |
196 | dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "PPBNDU"); | |
0cf7a633 | 197 | } else if (use_dma && use_dma_ppb && use_dma_ppb_du) { |
55d402d8 TD |
198 | DBG(dev, "DMA mode = PPBDU (packet per buffer " |
199 | "WITH desc. update)\n"); | |
200 | dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "PPBDU"); | |
201 | } | |
202 | if (use_dma && use_dma_bufferfill_mode) { | |
203 | DBG(dev, "DMA mode = BF (buffer fill mode)\n"); | |
204 | dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "BF"); | |
205 | } | |
170b778f | 206 | if (!use_dma) |
55d402d8 | 207 | dev_info(&dev->pdev->dev, "FIFO mode\n"); |
55d402d8 TD |
208 | DBG(dev, "-------------------------------------------------------\n"); |
209 | } | |
210 | ||
211 | /* Masks unused interrupts */ | |
212 | static int udc_mask_unused_interrupts(struct udc *dev) | |
213 | { | |
214 | u32 tmp; | |
215 | ||
216 | /* mask all dev interrupts */ | |
217 | tmp = AMD_BIT(UDC_DEVINT_SVC) | | |
218 | AMD_BIT(UDC_DEVINT_ENUM) | | |
219 | AMD_BIT(UDC_DEVINT_US) | | |
220 | AMD_BIT(UDC_DEVINT_UR) | | |
221 | AMD_BIT(UDC_DEVINT_ES) | | |
222 | AMD_BIT(UDC_DEVINT_SI) | | |
223 | AMD_BIT(UDC_DEVINT_SOF)| | |
224 | AMD_BIT(UDC_DEVINT_SC); | |
225 | writel(tmp, &dev->regs->irqmsk); | |
226 | ||
227 | /* mask all ep interrupts */ | |
228 | writel(UDC_EPINT_MSK_DISABLE_ALL, &dev->regs->ep_irqmsk); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | /* Enables endpoint 0 interrupts */ | |
234 | static int udc_enable_ep0_interrupts(struct udc *dev) | |
235 | { | |
236 | u32 tmp; | |
237 | ||
238 | DBG(dev, "udc_enable_ep0_interrupts()\n"); | |
239 | ||
240 | /* read irq mask */ | |
241 | tmp = readl(&dev->regs->ep_irqmsk); | |
242 | /* enable ep0 irq's */ | |
243 | tmp &= AMD_UNMASK_BIT(UDC_EPINT_IN_EP0) | |
244 | & AMD_UNMASK_BIT(UDC_EPINT_OUT_EP0); | |
245 | writel(tmp, &dev->regs->ep_irqmsk); | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
250 | /* Enables device interrupts for SET_INTF and SET_CONFIG */ | |
251 | static int udc_enable_dev_setup_interrupts(struct udc *dev) | |
252 | { | |
253 | u32 tmp; | |
254 | ||
255 | DBG(dev, "enable device interrupts for setup data\n"); | |
256 | ||
257 | /* read irq mask */ | |
258 | tmp = readl(&dev->regs->irqmsk); | |
259 | ||
260 | /* enable SET_INTERFACE, SET_CONFIG and other needed irq's */ | |
261 | tmp &= AMD_UNMASK_BIT(UDC_DEVINT_SI) | |
262 | & AMD_UNMASK_BIT(UDC_DEVINT_SC) | |
263 | & AMD_UNMASK_BIT(UDC_DEVINT_UR) | |
264 | & AMD_UNMASK_BIT(UDC_DEVINT_SVC) | |
265 | & AMD_UNMASK_BIT(UDC_DEVINT_ENUM); | |
266 | writel(tmp, &dev->regs->irqmsk); | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
25985edc | 271 | /* Calculates fifo start of endpoint based on preceding endpoints */ |
55d402d8 TD |
272 | static int udc_set_txfifo_addr(struct udc_ep *ep) |
273 | { | |
274 | struct udc *dev; | |
275 | u32 tmp; | |
276 | int i; | |
277 | ||
278 | if (!ep || !(ep->in)) | |
279 | return -EINVAL; | |
280 | ||
281 | dev = ep->dev; | |
282 | ep->txfifo = dev->txfifo; | |
283 | ||
284 | /* traverse ep's */ | |
285 | for (i = 0; i < ep->num; i++) { | |
286 | if (dev->ep[i].regs) { | |
287 | /* read fifo size */ | |
288 | tmp = readl(&dev->ep[i].regs->bufin_framenum); | |
289 | tmp = AMD_GETBITS(tmp, UDC_EPIN_BUFF_SIZE); | |
290 | ep->txfifo += tmp; | |
291 | } | |
292 | } | |
293 | return 0; | |
294 | } | |
295 | ||
296 | /* CNAK pending field: bit0 = ep0in, bit16 = ep0out */ | |
297 | static u32 cnak_pending; | |
298 | ||
299 | static void UDC_QUEUE_CNAK(struct udc_ep *ep, unsigned num) | |
300 | { | |
301 | if (readl(&ep->regs->ctl) & AMD_BIT(UDC_EPCTL_NAK)) { | |
302 | DBG(ep->dev, "NAK could not be cleared for ep%d\n", num); | |
303 | cnak_pending |= 1 << (num); | |
304 | ep->naking = 1; | |
305 | } else | |
306 | cnak_pending = cnak_pending & (~(1 << (num))); | |
307 | } | |
308 | ||
309 | ||
310 | /* Enables endpoint, is called by gadget driver */ | |
311 | static int | |
312 | udc_ep_enable(struct usb_ep *usbep, const struct usb_endpoint_descriptor *desc) | |
313 | { | |
314 | struct udc_ep *ep; | |
315 | struct udc *dev; | |
316 | u32 tmp; | |
317 | unsigned long iflags; | |
318 | u8 udc_csr_epix; | |
fd05e720 | 319 | unsigned maxpacket; |
55d402d8 TD |
320 | |
321 | if (!usbep | |
322 | || usbep->name == ep0_string | |
323 | || !desc | |
324 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
325 | return -EINVAL; | |
326 | ||
327 | ep = container_of(usbep, struct udc_ep, ep); | |
328 | dev = ep->dev; | |
329 | ||
330 | DBG(dev, "udc_ep_enable() ep %d\n", ep->num); | |
331 | ||
332 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
333 | return -ESHUTDOWN; | |
334 | ||
335 | spin_lock_irqsave(&dev->lock, iflags); | |
336 | ep->desc = desc; | |
337 | ||
338 | ep->halted = 0; | |
339 | ||
340 | /* set traffic type */ | |
341 | tmp = readl(&dev->ep[ep->num].regs->ctl); | |
342 | tmp = AMD_ADDBITS(tmp, desc->bmAttributes, UDC_EPCTL_ET); | |
343 | writel(tmp, &dev->ep[ep->num].regs->ctl); | |
344 | ||
345 | /* set max packet size */ | |
29cc8897 | 346 | maxpacket = usb_endpoint_maxp(desc); |
55d402d8 | 347 | tmp = readl(&dev->ep[ep->num].regs->bufout_maxpkt); |
fd05e720 AV |
348 | tmp = AMD_ADDBITS(tmp, maxpacket, UDC_EP_MAX_PKT_SIZE); |
349 | ep->ep.maxpacket = maxpacket; | |
55d402d8 TD |
350 | writel(tmp, &dev->ep[ep->num].regs->bufout_maxpkt); |
351 | ||
352 | /* IN ep */ | |
353 | if (ep->in) { | |
354 | ||
355 | /* ep ix in UDC CSR register space */ | |
356 | udc_csr_epix = ep->num; | |
357 | ||
358 | /* set buffer size (tx fifo entries) */ | |
359 | tmp = readl(&dev->ep[ep->num].regs->bufin_framenum); | |
360 | /* double buffering: fifo size = 2 x max packet size */ | |
361 | tmp = AMD_ADDBITS( | |
362 | tmp, | |
fd05e720 AV |
363 | maxpacket * UDC_EPIN_BUFF_SIZE_MULT |
364 | / UDC_DWORD_BYTES, | |
55d402d8 TD |
365 | UDC_EPIN_BUFF_SIZE); |
366 | writel(tmp, &dev->ep[ep->num].regs->bufin_framenum); | |
367 | ||
368 | /* calc. tx fifo base addr */ | |
369 | udc_set_txfifo_addr(ep); | |
370 | ||
371 | /* flush fifo */ | |
372 | tmp = readl(&ep->regs->ctl); | |
373 | tmp |= AMD_BIT(UDC_EPCTL_F); | |
374 | writel(tmp, &ep->regs->ctl); | |
375 | ||
376 | /* OUT ep */ | |
377 | } else { | |
378 | /* ep ix in UDC CSR register space */ | |
379 | udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; | |
380 | ||
381 | /* set max packet size UDC CSR */ | |
382 | tmp = readl(&dev->csr->ne[ep->num - UDC_CSR_EP_OUT_IX_OFS]); | |
fd05e720 | 383 | tmp = AMD_ADDBITS(tmp, maxpacket, |
55d402d8 TD |
384 | UDC_CSR_NE_MAX_PKT); |
385 | writel(tmp, &dev->csr->ne[ep->num - UDC_CSR_EP_OUT_IX_OFS]); | |
386 | ||
387 | if (use_dma && !ep->in) { | |
388 | /* alloc and init BNA dummy request */ | |
389 | ep->bna_dummy_req = udc_alloc_bna_dummy(ep); | |
390 | ep->bna_occurred = 0; | |
391 | } | |
392 | ||
393 | if (ep->num != UDC_EP0OUT_IX) | |
394 | dev->data_ep_enabled = 1; | |
395 | } | |
396 | ||
397 | /* set ep values */ | |
398 | tmp = readl(&dev->csr->ne[udc_csr_epix]); | |
399 | /* max packet */ | |
fd05e720 | 400 | tmp = AMD_ADDBITS(tmp, maxpacket, UDC_CSR_NE_MAX_PKT); |
55d402d8 TD |
401 | /* ep number */ |
402 | tmp = AMD_ADDBITS(tmp, desc->bEndpointAddress, UDC_CSR_NE_NUM); | |
403 | /* ep direction */ | |
404 | tmp = AMD_ADDBITS(tmp, ep->in, UDC_CSR_NE_DIR); | |
405 | /* ep type */ | |
406 | tmp = AMD_ADDBITS(tmp, desc->bmAttributes, UDC_CSR_NE_TYPE); | |
407 | /* ep config */ | |
408 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_config, UDC_CSR_NE_CFG); | |
409 | /* ep interface */ | |
410 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_intf, UDC_CSR_NE_INTF); | |
411 | /* ep alt */ | |
412 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_alt, UDC_CSR_NE_ALT); | |
413 | /* write reg */ | |
414 | writel(tmp, &dev->csr->ne[udc_csr_epix]); | |
415 | ||
416 | /* enable ep irq */ | |
417 | tmp = readl(&dev->regs->ep_irqmsk); | |
418 | tmp &= AMD_UNMASK_BIT(ep->num); | |
419 | writel(tmp, &dev->regs->ep_irqmsk); | |
420 | ||
421 | /* | |
422 | * clear NAK by writing CNAK | |
423 | * avoid BNA for OUT DMA, don't clear NAK until DMA desc. written | |
424 | */ | |
425 | if (!use_dma || ep->in) { | |
426 | tmp = readl(&ep->regs->ctl); | |
427 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
428 | writel(tmp, &ep->regs->ctl); | |
429 | ep->naking = 0; | |
430 | UDC_QUEUE_CNAK(ep, ep->num); | |
431 | } | |
432 | tmp = desc->bEndpointAddress; | |
433 | DBG(dev, "%s enabled\n", usbep->name); | |
434 | ||
435 | spin_unlock_irqrestore(&dev->lock, iflags); | |
436 | return 0; | |
437 | } | |
438 | ||
439 | /* Resets endpoint */ | |
440 | static void ep_init(struct udc_regs __iomem *regs, struct udc_ep *ep) | |
441 | { | |
442 | u32 tmp; | |
443 | ||
444 | VDBG(ep->dev, "ep-%d reset\n", ep->num); | |
445 | ep->desc = NULL; | |
f9c56cdd | 446 | ep->ep.desc = NULL; |
55d402d8 TD |
447 | ep->ep.ops = &udc_ep_ops; |
448 | INIT_LIST_HEAD(&ep->queue); | |
449 | ||
450 | ep->ep.maxpacket = (u16) ~0; | |
451 | /* set NAK */ | |
452 | tmp = readl(&ep->regs->ctl); | |
453 | tmp |= AMD_BIT(UDC_EPCTL_SNAK); | |
454 | writel(tmp, &ep->regs->ctl); | |
455 | ep->naking = 1; | |
456 | ||
457 | /* disable interrupt */ | |
458 | tmp = readl(®s->ep_irqmsk); | |
459 | tmp |= AMD_BIT(ep->num); | |
460 | writel(tmp, ®s->ep_irqmsk); | |
461 | ||
462 | if (ep->in) { | |
463 | /* unset P and IN bit of potential former DMA */ | |
464 | tmp = readl(&ep->regs->ctl); | |
465 | tmp &= AMD_UNMASK_BIT(UDC_EPCTL_P); | |
466 | writel(tmp, &ep->regs->ctl); | |
467 | ||
468 | tmp = readl(&ep->regs->sts); | |
469 | tmp |= AMD_BIT(UDC_EPSTS_IN); | |
470 | writel(tmp, &ep->regs->sts); | |
471 | ||
472 | /* flush the fifo */ | |
473 | tmp = readl(&ep->regs->ctl); | |
474 | tmp |= AMD_BIT(UDC_EPCTL_F); | |
475 | writel(tmp, &ep->regs->ctl); | |
476 | ||
477 | } | |
478 | /* reset desc pointer */ | |
479 | writel(0, &ep->regs->desptr); | |
480 | } | |
481 | ||
482 | /* Disables endpoint, is called by gadget driver */ | |
483 | static int udc_ep_disable(struct usb_ep *usbep) | |
484 | { | |
485 | struct udc_ep *ep = NULL; | |
486 | unsigned long iflags; | |
487 | ||
488 | if (!usbep) | |
489 | return -EINVAL; | |
490 | ||
491 | ep = container_of(usbep, struct udc_ep, ep); | |
492 | if (usbep->name == ep0_string || !ep->desc) | |
493 | return -EINVAL; | |
494 | ||
495 | DBG(ep->dev, "Disable ep-%d\n", ep->num); | |
496 | ||
497 | spin_lock_irqsave(&ep->dev->lock, iflags); | |
498 | udc_free_request(&ep->ep, &ep->bna_dummy_req->req); | |
499 | empty_req_queue(ep); | |
500 | ep_init(ep->dev->regs, ep); | |
501 | spin_unlock_irqrestore(&ep->dev->lock, iflags); | |
502 | ||
503 | return 0; | |
504 | } | |
505 | ||
506 | /* Allocates request packet, called by gadget driver */ | |
507 | static struct usb_request * | |
508 | udc_alloc_request(struct usb_ep *usbep, gfp_t gfp) | |
509 | { | |
510 | struct udc_request *req; | |
511 | struct udc_data_dma *dma_desc; | |
512 | struct udc_ep *ep; | |
513 | ||
514 | if (!usbep) | |
515 | return NULL; | |
516 | ||
517 | ep = container_of(usbep, struct udc_ep, ep); | |
518 | ||
519 | VDBG(ep->dev, "udc_alloc_req(): ep%d\n", ep->num); | |
520 | req = kzalloc(sizeof(struct udc_request), gfp); | |
521 | if (!req) | |
522 | return NULL; | |
523 | ||
524 | req->req.dma = DMA_DONT_USE; | |
525 | INIT_LIST_HEAD(&req->queue); | |
526 | ||
527 | if (ep->dma) { | |
528 | /* ep0 in requests are allocated from data pool here */ | |
529 | dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp, | |
530 | &req->td_phys); | |
531 | if (!dma_desc) { | |
532 | kfree(req); | |
533 | return NULL; | |
534 | } | |
535 | ||
536 | VDBG(ep->dev, "udc_alloc_req: req = %p dma_desc = %p, " | |
537 | "td_phys = %lx\n", | |
538 | req, dma_desc, | |
539 | (unsigned long)req->td_phys); | |
540 | /* prevent from using desc. - set HOST BUSY */ | |
541 | dma_desc->status = AMD_ADDBITS(dma_desc->status, | |
542 | UDC_DMA_STP_STS_BS_HOST_BUSY, | |
543 | UDC_DMA_STP_STS_BS); | |
551509d2 | 544 | dma_desc->bufptr = cpu_to_le32(DMA_DONT_USE); |
55d402d8 TD |
545 | req->td_data = dma_desc; |
546 | req->td_data_last = NULL; | |
547 | req->chain_len = 1; | |
548 | } | |
549 | ||
550 | return &req->req; | |
551 | } | |
552 | ||
553 | /* Frees request packet, called by gadget driver */ | |
554 | static void | |
555 | udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq) | |
556 | { | |
557 | struct udc_ep *ep; | |
558 | struct udc_request *req; | |
559 | ||
560 | if (!usbep || !usbreq) | |
561 | return; | |
562 | ||
563 | ep = container_of(usbep, struct udc_ep, ep); | |
564 | req = container_of(usbreq, struct udc_request, req); | |
565 | VDBG(ep->dev, "free_req req=%p\n", req); | |
566 | BUG_ON(!list_empty(&req->queue)); | |
567 | if (req->td_data) { | |
568 | VDBG(ep->dev, "req->td_data=%p\n", req->td_data); | |
569 | ||
570 | /* free dma chain if created */ | |
170b778f | 571 | if (req->chain_len > 1) |
55d402d8 | 572 | udc_free_dma_chain(ep->dev, req); |
55d402d8 TD |
573 | |
574 | pci_pool_free(ep->dev->data_requests, req->td_data, | |
575 | req->td_phys); | |
576 | } | |
577 | kfree(req); | |
578 | } | |
579 | ||
580 | /* Init BNA dummy descriptor for HOST BUSY and pointing to itself */ | |
581 | static void udc_init_bna_dummy(struct udc_request *req) | |
582 | { | |
583 | if (req) { | |
584 | /* set last bit */ | |
585 | req->td_data->status |= AMD_BIT(UDC_DMA_IN_STS_L); | |
586 | /* set next pointer to itself */ | |
587 | req->td_data->next = req->td_phys; | |
588 | /* set HOST BUSY */ | |
589 | req->td_data->status | |
590 | = AMD_ADDBITS(req->td_data->status, | |
591 | UDC_DMA_STP_STS_BS_DMA_DONE, | |
592 | UDC_DMA_STP_STS_BS); | |
593 | #ifdef UDC_VERBOSE | |
594 | pr_debug("bna desc = %p, sts = %08x\n", | |
595 | req->td_data, req->td_data->status); | |
596 | #endif | |
597 | } | |
598 | } | |
599 | ||
600 | /* Allocate BNA dummy descriptor */ | |
601 | static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep) | |
602 | { | |
603 | struct udc_request *req = NULL; | |
604 | struct usb_request *_req = NULL; | |
605 | ||
606 | /* alloc the dummy request */ | |
607 | _req = udc_alloc_request(&ep->ep, GFP_ATOMIC); | |
608 | if (_req) { | |
609 | req = container_of(_req, struct udc_request, req); | |
610 | ep->bna_dummy_req = req; | |
611 | udc_init_bna_dummy(req); | |
612 | } | |
613 | return req; | |
614 | } | |
615 | ||
616 | /* Write data to TX fifo for IN packets */ | |
617 | static void | |
618 | udc_txfifo_write(struct udc_ep *ep, struct usb_request *req) | |
619 | { | |
620 | u8 *req_buf; | |
621 | u32 *buf; | |
622 | int i, j; | |
623 | unsigned bytes = 0; | |
624 | unsigned remaining = 0; | |
625 | ||
626 | if (!req || !ep) | |
627 | return; | |
628 | ||
629 | req_buf = req->buf + req->actual; | |
630 | prefetch(req_buf); | |
631 | remaining = req->length - req->actual; | |
632 | ||
633 | buf = (u32 *) req_buf; | |
634 | ||
635 | bytes = ep->ep.maxpacket; | |
636 | if (bytes > remaining) | |
637 | bytes = remaining; | |
638 | ||
639 | /* dwords first */ | |
170b778f | 640 | for (i = 0; i < bytes / UDC_DWORD_BYTES; i++) |
55d402d8 | 641 | writel(*(buf + i), ep->txfifo); |
55d402d8 TD |
642 | |
643 | /* remaining bytes must be written by byte access */ | |
644 | for (j = 0; j < bytes % UDC_DWORD_BYTES; j++) { | |
645 | writeb((u8)(*(buf + i) >> (j << UDC_BITS_PER_BYTE_SHIFT)), | |
646 | ep->txfifo); | |
647 | } | |
648 | ||
649 | /* dummy write confirm */ | |
650 | writel(0, &ep->regs->confirm); | |
651 | } | |
652 | ||
653 | /* Read dwords from RX fifo for OUT transfers */ | |
654 | static int udc_rxfifo_read_dwords(struct udc *dev, u32 *buf, int dwords) | |
655 | { | |
656 | int i; | |
657 | ||
658 | VDBG(dev, "udc_read_dwords(): %d dwords\n", dwords); | |
659 | ||
170b778f | 660 | for (i = 0; i < dwords; i++) |
55d402d8 | 661 | *(buf + i) = readl(dev->rxfifo); |
55d402d8 TD |
662 | return 0; |
663 | } | |
664 | ||
665 | /* Read bytes from RX fifo for OUT transfers */ | |
666 | static int udc_rxfifo_read_bytes(struct udc *dev, u8 *buf, int bytes) | |
667 | { | |
668 | int i, j; | |
669 | u32 tmp; | |
670 | ||
671 | VDBG(dev, "udc_read_bytes(): %d bytes\n", bytes); | |
672 | ||
673 | /* dwords first */ | |
170b778f | 674 | for (i = 0; i < bytes / UDC_DWORD_BYTES; i++) |
55d402d8 | 675 | *((u32 *)(buf + (i<<2))) = readl(dev->rxfifo); |
55d402d8 TD |
676 | |
677 | /* remaining bytes must be read by byte access */ | |
678 | if (bytes % UDC_DWORD_BYTES) { | |
679 | tmp = readl(dev->rxfifo); | |
680 | for (j = 0; j < bytes % UDC_DWORD_BYTES; j++) { | |
681 | *(buf + (i<<2) + j) = (u8)(tmp & UDC_BYTE_MASK); | |
682 | tmp = tmp >> UDC_BITS_PER_BYTE; | |
683 | } | |
684 | } | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
689 | /* Read data from RX fifo for OUT transfers */ | |
690 | static int | |
691 | udc_rxfifo_read(struct udc_ep *ep, struct udc_request *req) | |
692 | { | |
693 | u8 *buf; | |
694 | unsigned buf_space; | |
695 | unsigned bytes = 0; | |
696 | unsigned finished = 0; | |
697 | ||
698 | /* received number bytes */ | |
699 | bytes = readl(&ep->regs->sts); | |
700 | bytes = AMD_GETBITS(bytes, UDC_EPSTS_RX_PKT_SIZE); | |
701 | ||
702 | buf_space = req->req.length - req->req.actual; | |
703 | buf = req->req.buf + req->req.actual; | |
704 | if (bytes > buf_space) { | |
705 | if ((buf_space % ep->ep.maxpacket) != 0) { | |
706 | DBG(ep->dev, | |
707 | "%s: rx %d bytes, rx-buf space = %d bytesn\n", | |
708 | ep->ep.name, bytes, buf_space); | |
709 | req->req.status = -EOVERFLOW; | |
710 | } | |
711 | bytes = buf_space; | |
712 | } | |
713 | req->req.actual += bytes; | |
714 | ||
715 | /* last packet ? */ | |
716 | if (((bytes % ep->ep.maxpacket) != 0) || (!bytes) | |
717 | || ((req->req.actual == req->req.length) && !req->req.zero)) | |
718 | finished = 1; | |
719 | ||
720 | /* read rx fifo bytes */ | |
721 | VDBG(ep->dev, "ep %s: rxfifo read %d bytes\n", ep->ep.name, bytes); | |
722 | udc_rxfifo_read_bytes(ep->dev, buf, bytes); | |
723 | ||
724 | return finished; | |
725 | } | |
726 | ||
727 | /* create/re-init a DMA descriptor or a DMA descriptor chain */ | |
728 | static int prep_dma(struct udc_ep *ep, struct udc_request *req, gfp_t gfp) | |
729 | { | |
730 | int retval = 0; | |
731 | u32 tmp; | |
732 | ||
733 | VDBG(ep->dev, "prep_dma\n"); | |
734 | VDBG(ep->dev, "prep_dma ep%d req->td_data=%p\n", | |
735 | ep->num, req->td_data); | |
736 | ||
737 | /* set buffer pointer */ | |
738 | req->td_data->bufptr = req->req.dma; | |
739 | ||
740 | /* set last bit */ | |
741 | req->td_data->status |= AMD_BIT(UDC_DMA_IN_STS_L); | |
742 | ||
743 | /* build/re-init dma chain if maxpkt scatter mode, not for EP0 */ | |
744 | if (use_dma_ppb) { | |
745 | ||
746 | retval = udc_create_dma_chain(ep, req, ep->ep.maxpacket, gfp); | |
747 | if (retval != 0) { | |
748 | if (retval == -ENOMEM) | |
749 | DBG(ep->dev, "Out of DMA memory\n"); | |
750 | return retval; | |
751 | } | |
752 | if (ep->in) { | |
753 | if (req->req.length == ep->ep.maxpacket) { | |
754 | /* write tx bytes */ | |
755 | req->td_data->status = | |
756 | AMD_ADDBITS(req->td_data->status, | |
757 | ep->ep.maxpacket, | |
758 | UDC_DMA_IN_STS_TXBYTES); | |
759 | ||
760 | } | |
761 | } | |
762 | ||
763 | } | |
764 | ||
765 | if (ep->in) { | |
766 | VDBG(ep->dev, "IN: use_dma_ppb=%d req->req.len=%d " | |
767 | "maxpacket=%d ep%d\n", | |
768 | use_dma_ppb, req->req.length, | |
769 | ep->ep.maxpacket, ep->num); | |
770 | /* | |
771 | * if bytes < max packet then tx bytes must | |
772 | * be written in packet per buffer mode | |
773 | */ | |
774 | if (!use_dma_ppb || req->req.length < ep->ep.maxpacket | |
775 | || ep->num == UDC_EP0OUT_IX | |
776 | || ep->num == UDC_EP0IN_IX) { | |
777 | /* write tx bytes */ | |
778 | req->td_data->status = | |
779 | AMD_ADDBITS(req->td_data->status, | |
780 | req->req.length, | |
781 | UDC_DMA_IN_STS_TXBYTES); | |
782 | /* reset frame num */ | |
783 | req->td_data->status = | |
784 | AMD_ADDBITS(req->td_data->status, | |
785 | 0, | |
786 | UDC_DMA_IN_STS_FRAMENUM); | |
787 | } | |
788 | /* set HOST BUSY */ | |
789 | req->td_data->status = | |
790 | AMD_ADDBITS(req->td_data->status, | |
791 | UDC_DMA_STP_STS_BS_HOST_BUSY, | |
792 | UDC_DMA_STP_STS_BS); | |
793 | } else { | |
794 | VDBG(ep->dev, "OUT set host ready\n"); | |
795 | /* set HOST READY */ | |
796 | req->td_data->status = | |
797 | AMD_ADDBITS(req->td_data->status, | |
798 | UDC_DMA_STP_STS_BS_HOST_READY, | |
799 | UDC_DMA_STP_STS_BS); | |
800 | ||
801 | ||
802 | /* clear NAK by writing CNAK */ | |
803 | if (ep->naking) { | |
804 | tmp = readl(&ep->regs->ctl); | |
805 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
806 | writel(tmp, &ep->regs->ctl); | |
807 | ep->naking = 0; | |
808 | UDC_QUEUE_CNAK(ep, ep->num); | |
809 | } | |
810 | ||
811 | } | |
812 | ||
813 | return retval; | |
814 | } | |
815 | ||
816 | /* Completes request packet ... caller MUST hold lock */ | |
817 | static void | |
818 | complete_req(struct udc_ep *ep, struct udc_request *req, int sts) | |
819 | __releases(ep->dev->lock) | |
820 | __acquires(ep->dev->lock) | |
821 | { | |
822 | struct udc *dev; | |
823 | unsigned halted; | |
824 | ||
825 | VDBG(ep->dev, "complete_req(): ep%d\n", ep->num); | |
826 | ||
827 | dev = ep->dev; | |
828 | /* unmap DMA */ | |
220e8600 FB |
829 | if (ep->dma) |
830 | usb_gadget_unmap_request(&dev->gadget, &req->req, ep->in); | |
55d402d8 TD |
831 | |
832 | halted = ep->halted; | |
833 | ep->halted = 1; | |
834 | ||
835 | /* set new status if pending */ | |
836 | if (req->req.status == -EINPROGRESS) | |
837 | req->req.status = sts; | |
838 | ||
839 | /* remove from ep queue */ | |
840 | list_del_init(&req->queue); | |
841 | ||
842 | VDBG(ep->dev, "req %p => complete %d bytes at %s with sts %d\n", | |
843 | &req->req, req->req.length, ep->ep.name, sts); | |
844 | ||
845 | spin_unlock(&dev->lock); | |
846 | req->req.complete(&ep->ep, &req->req); | |
847 | spin_lock(&dev->lock); | |
848 | ep->halted = halted; | |
849 | } | |
850 | ||
851 | /* frees pci pool descriptors of a DMA chain */ | |
852 | static int udc_free_dma_chain(struct udc *dev, struct udc_request *req) | |
853 | { | |
854 | ||
855 | int ret_val = 0; | |
856 | struct udc_data_dma *td; | |
857 | struct udc_data_dma *td_last = NULL; | |
858 | unsigned int i; | |
859 | ||
860 | DBG(dev, "free chain req = %p\n", req); | |
861 | ||
862 | /* do not free first desc., will be done by free for request */ | |
863 | td_last = req->td_data; | |
864 | td = phys_to_virt(td_last->next); | |
865 | ||
866 | for (i = 1; i < req->chain_len; i++) { | |
867 | ||
868 | pci_pool_free(dev->data_requests, td, | |
869 | (dma_addr_t) td_last->next); | |
870 | td_last = td; | |
871 | td = phys_to_virt(td_last->next); | |
872 | } | |
873 | ||
874 | return ret_val; | |
875 | } | |
876 | ||
877 | /* Iterates to the end of a DMA chain and returns last descriptor */ | |
878 | static struct udc_data_dma *udc_get_last_dma_desc(struct udc_request *req) | |
879 | { | |
880 | struct udc_data_dma *td; | |
881 | ||
882 | td = req->td_data; | |
170b778f | 883 | while (td && !(td->status & AMD_BIT(UDC_DMA_IN_STS_L))) |
55d402d8 | 884 | td = phys_to_virt(td->next); |
55d402d8 TD |
885 | |
886 | return td; | |
887 | ||
888 | } | |
889 | ||
890 | /* Iterates to the end of a DMA chain and counts bytes received */ | |
891 | static u32 udc_get_ppbdu_rxbytes(struct udc_request *req) | |
892 | { | |
893 | struct udc_data_dma *td; | |
894 | u32 count; | |
895 | ||
896 | td = req->td_data; | |
897 | /* received number bytes */ | |
898 | count = AMD_GETBITS(td->status, UDC_DMA_OUT_STS_RXBYTES); | |
899 | ||
900 | while (td && !(td->status & AMD_BIT(UDC_DMA_IN_STS_L))) { | |
901 | td = phys_to_virt(td->next); | |
902 | /* received number bytes */ | |
903 | if (td) { | |
904 | count += AMD_GETBITS(td->status, | |
905 | UDC_DMA_OUT_STS_RXBYTES); | |
906 | } | |
907 | } | |
908 | ||
909 | return count; | |
910 | ||
911 | } | |
912 | ||
913 | /* Creates or re-inits a DMA chain */ | |
914 | static int udc_create_dma_chain( | |
915 | struct udc_ep *ep, | |
916 | struct udc_request *req, | |
917 | unsigned long buf_len, gfp_t gfp_flags | |
918 | ) | |
919 | { | |
920 | unsigned long bytes = req->req.length; | |
921 | unsigned int i; | |
922 | dma_addr_t dma_addr; | |
923 | struct udc_data_dma *td = NULL; | |
924 | struct udc_data_dma *last = NULL; | |
925 | unsigned long txbytes; | |
926 | unsigned create_new_chain = 0; | |
927 | unsigned len; | |
928 | ||
929 | VDBG(ep->dev, "udc_create_dma_chain: bytes=%ld buf_len=%ld\n", | |
930 | bytes, buf_len); | |
931 | dma_addr = DMA_DONT_USE; | |
932 | ||
933 | /* unset L bit in first desc for OUT */ | |
170b778f | 934 | if (!ep->in) |
55d402d8 | 935 | req->td_data->status &= AMD_CLEAR_BIT(UDC_DMA_IN_STS_L); |
55d402d8 TD |
936 | |
937 | /* alloc only new desc's if not already available */ | |
938 | len = req->req.length / ep->ep.maxpacket; | |
170b778f | 939 | if (req->req.length % ep->ep.maxpacket) |
55d402d8 | 940 | len++; |
55d402d8 TD |
941 | |
942 | if (len > req->chain_len) { | |
943 | /* shorter chain already allocated before */ | |
170b778f | 944 | if (req->chain_len > 1) |
55d402d8 | 945 | udc_free_dma_chain(ep->dev, req); |
55d402d8 TD |
946 | req->chain_len = len; |
947 | create_new_chain = 1; | |
948 | } | |
949 | ||
950 | td = req->td_data; | |
951 | /* gen. required number of descriptors and buffers */ | |
952 | for (i = buf_len; i < bytes; i += buf_len) { | |
953 | /* create or determine next desc. */ | |
954 | if (create_new_chain) { | |
955 | ||
956 | td = pci_pool_alloc(ep->dev->data_requests, | |
957 | gfp_flags, &dma_addr); | |
958 | if (!td) | |
959 | return -ENOMEM; | |
960 | ||
961 | td->status = 0; | |
962 | } else if (i == buf_len) { | |
963 | /* first td */ | |
964 | td = (struct udc_data_dma *) phys_to_virt( | |
965 | req->td_data->next); | |
966 | td->status = 0; | |
967 | } else { | |
968 | td = (struct udc_data_dma *) phys_to_virt(last->next); | |
969 | td->status = 0; | |
970 | } | |
971 | ||
972 | ||
973 | if (td) | |
974 | td->bufptr = req->req.dma + i; /* assign buffer */ | |
975 | else | |
976 | break; | |
977 | ||
978 | /* short packet ? */ | |
979 | if ((bytes - i) >= buf_len) { | |
980 | txbytes = buf_len; | |
981 | } else { | |
982 | /* short packet */ | |
983 | txbytes = bytes - i; | |
984 | } | |
985 | ||
986 | /* link td and assign tx bytes */ | |
987 | if (i == buf_len) { | |
170b778f | 988 | if (create_new_chain) |
55d402d8 | 989 | req->td_data->next = dma_addr; |
170b778f CR |
990 | /* |
991 | else | |
992 | req->td_data->next = virt_to_phys(td); | |
993 | */ | |
55d402d8 TD |
994 | /* write tx bytes */ |
995 | if (ep->in) { | |
996 | /* first desc */ | |
997 | req->td_data->status = | |
998 | AMD_ADDBITS(req->td_data->status, | |
999 | ep->ep.maxpacket, | |
1000 | UDC_DMA_IN_STS_TXBYTES); | |
1001 | /* second desc */ | |
1002 | td->status = AMD_ADDBITS(td->status, | |
1003 | txbytes, | |
1004 | UDC_DMA_IN_STS_TXBYTES); | |
1005 | } | |
1006 | } else { | |
170b778f | 1007 | if (create_new_chain) |
55d402d8 | 1008 | last->next = dma_addr; |
170b778f CR |
1009 | /* |
1010 | else | |
1011 | last->next = virt_to_phys(td); | |
1012 | */ | |
55d402d8 TD |
1013 | if (ep->in) { |
1014 | /* write tx bytes */ | |
1015 | td->status = AMD_ADDBITS(td->status, | |
1016 | txbytes, | |
1017 | UDC_DMA_IN_STS_TXBYTES); | |
1018 | } | |
1019 | } | |
1020 | last = td; | |
1021 | } | |
1022 | /* set last bit */ | |
1023 | if (td) { | |
1024 | td->status |= AMD_BIT(UDC_DMA_IN_STS_L); | |
1025 | /* last desc. points to itself */ | |
1026 | req->td_data_last = td; | |
1027 | } | |
1028 | ||
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | /* Enabling RX DMA */ | |
1033 | static void udc_set_rde(struct udc *dev) | |
1034 | { | |
1035 | u32 tmp; | |
1036 | ||
1037 | VDBG(dev, "udc_set_rde()\n"); | |
1038 | /* stop RDE timer */ | |
1039 | if (timer_pending(&udc_timer)) { | |
1040 | set_rde = 0; | |
1041 | mod_timer(&udc_timer, jiffies - 1); | |
1042 | } | |
1043 | /* set RDE */ | |
1044 | tmp = readl(&dev->regs->ctl); | |
1045 | tmp |= AMD_BIT(UDC_DEVCTL_RDE); | |
1046 | writel(tmp, &dev->regs->ctl); | |
1047 | } | |
1048 | ||
1049 | /* Queues a request packet, called by gadget driver */ | |
1050 | static int | |
1051 | udc_queue(struct usb_ep *usbep, struct usb_request *usbreq, gfp_t gfp) | |
1052 | { | |
1053 | int retval = 0; | |
1054 | u8 open_rxfifo = 0; | |
1055 | unsigned long iflags; | |
1056 | struct udc_ep *ep; | |
1057 | struct udc_request *req; | |
1058 | struct udc *dev; | |
1059 | u32 tmp; | |
1060 | ||
1061 | /* check the inputs */ | |
1062 | req = container_of(usbreq, struct udc_request, req); | |
1063 | ||
1064 | if (!usbep || !usbreq || !usbreq->complete || !usbreq->buf | |
1065 | || !list_empty(&req->queue)) | |
1066 | return -EINVAL; | |
1067 | ||
1068 | ep = container_of(usbep, struct udc_ep, ep); | |
1069 | if (!ep->desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX)) | |
1070 | return -EINVAL; | |
1071 | ||
1072 | VDBG(ep->dev, "udc_queue(): ep%d-in=%d\n", ep->num, ep->in); | |
1073 | dev = ep->dev; | |
1074 | ||
1075 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1076 | return -ESHUTDOWN; | |
1077 | ||
1078 | /* map dma (usually done before) */ | |
220e8600 | 1079 | if (ep->dma) { |
55d402d8 | 1080 | VDBG(dev, "DMA map req %p\n", req); |
220e8600 FB |
1081 | retval = usb_gadget_map_request(&udc->gadget, usbreq, ep->in); |
1082 | if (retval) | |
1083 | return retval; | |
55d402d8 TD |
1084 | } |
1085 | ||
1086 | VDBG(dev, "%s queue req %p, len %d req->td_data=%p buf %p\n", | |
1087 | usbep->name, usbreq, usbreq->length, | |
1088 | req->td_data, usbreq->buf); | |
1089 | ||
1090 | spin_lock_irqsave(&dev->lock, iflags); | |
1091 | usbreq->actual = 0; | |
1092 | usbreq->status = -EINPROGRESS; | |
1093 | req->dma_done = 0; | |
1094 | ||
1095 | /* on empty queue just do first transfer */ | |
1096 | if (list_empty(&ep->queue)) { | |
1097 | /* zlp */ | |
1098 | if (usbreq->length == 0) { | |
1099 | /* IN zlp's are handled by hardware */ | |
1100 | complete_req(ep, req, 0); | |
1101 | VDBG(dev, "%s: zlp\n", ep->ep.name); | |
1102 | /* | |
1103 | * if set_config or set_intf is waiting for ack by zlp | |
1104 | * then set CSR_DONE | |
1105 | */ | |
1106 | if (dev->set_cfg_not_acked) { | |
1107 | tmp = readl(&dev->regs->ctl); | |
1108 | tmp |= AMD_BIT(UDC_DEVCTL_CSR_DONE); | |
1109 | writel(tmp, &dev->regs->ctl); | |
1110 | dev->set_cfg_not_acked = 0; | |
1111 | } | |
1112 | /* setup command is ACK'ed now by zlp */ | |
1113 | if (dev->waiting_zlp_ack_ep0in) { | |
1114 | /* clear NAK by writing CNAK in EP0_IN */ | |
1115 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1116 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1117 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1118 | dev->ep[UDC_EP0IN_IX].naking = 0; | |
1119 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], | |
1120 | UDC_EP0IN_IX); | |
1121 | dev->waiting_zlp_ack_ep0in = 0; | |
1122 | } | |
1123 | goto finished; | |
1124 | } | |
1125 | if (ep->dma) { | |
1126 | retval = prep_dma(ep, req, gfp); | |
1127 | if (retval != 0) | |
1128 | goto finished; | |
1129 | /* write desc pointer to enable DMA */ | |
1130 | if (ep->in) { | |
1131 | /* set HOST READY */ | |
1132 | req->td_data->status = | |
1133 | AMD_ADDBITS(req->td_data->status, | |
1134 | UDC_DMA_IN_STS_BS_HOST_READY, | |
1135 | UDC_DMA_IN_STS_BS); | |
1136 | } | |
1137 | ||
1138 | /* disabled rx dma while descriptor update */ | |
1139 | if (!ep->in) { | |
1140 | /* stop RDE timer */ | |
1141 | if (timer_pending(&udc_timer)) { | |
1142 | set_rde = 0; | |
1143 | mod_timer(&udc_timer, jiffies - 1); | |
1144 | } | |
1145 | /* clear RDE */ | |
1146 | tmp = readl(&dev->regs->ctl); | |
1147 | tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_RDE); | |
1148 | writel(tmp, &dev->regs->ctl); | |
1149 | open_rxfifo = 1; | |
1150 | ||
1151 | /* | |
1152 | * if BNA occurred then let BNA dummy desc. | |
1153 | * point to current desc. | |
1154 | */ | |
1155 | if (ep->bna_occurred) { | |
1156 | VDBG(dev, "copy to BNA dummy desc.\n"); | |
1157 | memcpy(ep->bna_dummy_req->td_data, | |
1158 | req->td_data, | |
1159 | sizeof(struct udc_data_dma)); | |
1160 | } | |
1161 | } | |
1162 | /* write desc pointer */ | |
1163 | writel(req->td_phys, &ep->regs->desptr); | |
1164 | ||
1165 | /* clear NAK by writing CNAK */ | |
1166 | if (ep->naking) { | |
1167 | tmp = readl(&ep->regs->ctl); | |
1168 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1169 | writel(tmp, &ep->regs->ctl); | |
1170 | ep->naking = 0; | |
1171 | UDC_QUEUE_CNAK(ep, ep->num); | |
1172 | } | |
1173 | ||
1174 | if (ep->in) { | |
1175 | /* enable ep irq */ | |
1176 | tmp = readl(&dev->regs->ep_irqmsk); | |
1177 | tmp &= AMD_UNMASK_BIT(ep->num); | |
1178 | writel(tmp, &dev->regs->ep_irqmsk); | |
1179 | } | |
c5deb832 TD |
1180 | } else if (ep->in) { |
1181 | /* enable ep irq */ | |
1182 | tmp = readl(&dev->regs->ep_irqmsk); | |
1183 | tmp &= AMD_UNMASK_BIT(ep->num); | |
1184 | writel(tmp, &dev->regs->ep_irqmsk); | |
1185 | } | |
55d402d8 TD |
1186 | |
1187 | } else if (ep->dma) { | |
1188 | ||
1189 | /* | |
1190 | * prep_dma not used for OUT ep's, this is not possible | |
1191 | * for PPB modes, because of chain creation reasons | |
1192 | */ | |
1193 | if (ep->in) { | |
1194 | retval = prep_dma(ep, req, gfp); | |
1195 | if (retval != 0) | |
1196 | goto finished; | |
1197 | } | |
1198 | } | |
1199 | VDBG(dev, "list_add\n"); | |
1200 | /* add request to ep queue */ | |
1201 | if (req) { | |
1202 | ||
1203 | list_add_tail(&req->queue, &ep->queue); | |
1204 | ||
1205 | /* open rxfifo if out data queued */ | |
1206 | if (open_rxfifo) { | |
1207 | /* enable DMA */ | |
1208 | req->dma_going = 1; | |
1209 | udc_set_rde(dev); | |
1210 | if (ep->num != UDC_EP0OUT_IX) | |
1211 | dev->data_ep_queued = 1; | |
1212 | } | |
1213 | /* stop OUT naking */ | |
1214 | if (!ep->in) { | |
1215 | if (!use_dma && udc_rxfifo_pending) { | |
fec8de3a | 1216 | DBG(dev, "udc_queue(): pending bytes in " |
55d402d8 TD |
1217 | "rxfifo after nyet\n"); |
1218 | /* | |
1219 | * read pending bytes afer nyet: | |
1220 | * referring to isr | |
1221 | */ | |
1222 | if (udc_rxfifo_read(ep, req)) { | |
1223 | /* finish */ | |
1224 | complete_req(ep, req, 0); | |
1225 | } | |
1226 | udc_rxfifo_pending = 0; | |
1227 | ||
1228 | } | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | finished: | |
1233 | spin_unlock_irqrestore(&dev->lock, iflags); | |
1234 | return retval; | |
1235 | } | |
1236 | ||
1237 | /* Empty request queue of an endpoint; caller holds spinlock */ | |
1238 | static void empty_req_queue(struct udc_ep *ep) | |
1239 | { | |
1240 | struct udc_request *req; | |
1241 | ||
1242 | ep->halted = 1; | |
1243 | while (!list_empty(&ep->queue)) { | |
1244 | req = list_entry(ep->queue.next, | |
1245 | struct udc_request, | |
1246 | queue); | |
1247 | complete_req(ep, req, -ESHUTDOWN); | |
1248 | } | |
1249 | } | |
1250 | ||
1251 | /* Dequeues a request packet, called by gadget driver */ | |
1252 | static int udc_dequeue(struct usb_ep *usbep, struct usb_request *usbreq) | |
1253 | { | |
1254 | struct udc_ep *ep; | |
1255 | struct udc_request *req; | |
1256 | unsigned halted; | |
1257 | unsigned long iflags; | |
1258 | ||
1259 | ep = container_of(usbep, struct udc_ep, ep); | |
1260 | if (!usbep || !usbreq || (!ep->desc && (ep->num != 0 | |
1261 | && ep->num != UDC_EP0OUT_IX))) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | req = container_of(usbreq, struct udc_request, req); | |
1265 | ||
1266 | spin_lock_irqsave(&ep->dev->lock, iflags); | |
1267 | halted = ep->halted; | |
1268 | ep->halted = 1; | |
1269 | /* request in processing or next one */ | |
1270 | if (ep->queue.next == &req->queue) { | |
1271 | if (ep->dma && req->dma_going) { | |
1272 | if (ep->in) | |
1273 | ep->cancel_transfer = 1; | |
1274 | else { | |
1275 | u32 tmp; | |
1276 | u32 dma_sts; | |
1277 | /* stop potential receive DMA */ | |
1278 | tmp = readl(&udc->regs->ctl); | |
1279 | writel(tmp & AMD_UNMASK_BIT(UDC_DEVCTL_RDE), | |
1280 | &udc->regs->ctl); | |
1281 | /* | |
1282 | * Cancel transfer later in ISR | |
1283 | * if descriptor was touched. | |
1284 | */ | |
1285 | dma_sts = AMD_GETBITS(req->td_data->status, | |
1286 | UDC_DMA_OUT_STS_BS); | |
1287 | if (dma_sts != UDC_DMA_OUT_STS_BS_HOST_READY) | |
1288 | ep->cancel_transfer = 1; | |
1289 | else { | |
1290 | udc_init_bna_dummy(ep->req); | |
1291 | writel(ep->bna_dummy_req->td_phys, | |
1292 | &ep->regs->desptr); | |
1293 | } | |
1294 | writel(tmp, &udc->regs->ctl); | |
1295 | } | |
1296 | } | |
1297 | } | |
1298 | complete_req(ep, req, -ECONNRESET); | |
1299 | ep->halted = halted; | |
1300 | ||
1301 | spin_unlock_irqrestore(&ep->dev->lock, iflags); | |
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | /* Halt or clear halt of endpoint */ | |
1306 | static int | |
1307 | udc_set_halt(struct usb_ep *usbep, int halt) | |
1308 | { | |
1309 | struct udc_ep *ep; | |
1310 | u32 tmp; | |
1311 | unsigned long iflags; | |
1312 | int retval = 0; | |
1313 | ||
1314 | if (!usbep) | |
1315 | return -EINVAL; | |
1316 | ||
1317 | pr_debug("set_halt %s: halt=%d\n", usbep->name, halt); | |
1318 | ||
1319 | ep = container_of(usbep, struct udc_ep, ep); | |
1320 | if (!ep->desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX)) | |
1321 | return -EINVAL; | |
1322 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) | |
1323 | return -ESHUTDOWN; | |
1324 | ||
1325 | spin_lock_irqsave(&udc_stall_spinlock, iflags); | |
1326 | /* halt or clear halt */ | |
1327 | if (halt) { | |
1328 | if (ep->num == 0) | |
1329 | ep->dev->stall_ep0in = 1; | |
1330 | else { | |
1331 | /* | |
1332 | * set STALL | |
1333 | * rxfifo empty not taken into acount | |
1334 | */ | |
1335 | tmp = readl(&ep->regs->ctl); | |
1336 | tmp |= AMD_BIT(UDC_EPCTL_S); | |
1337 | writel(tmp, &ep->regs->ctl); | |
1338 | ep->halted = 1; | |
1339 | ||
1340 | /* setup poll timer */ | |
1341 | if (!timer_pending(&udc_pollstall_timer)) { | |
1342 | udc_pollstall_timer.expires = jiffies + | |
1343 | HZ * UDC_POLLSTALL_TIMER_USECONDS | |
1344 | / (1000 * 1000); | |
1345 | if (!stop_pollstall_timer) { | |
1346 | DBG(ep->dev, "start polltimer\n"); | |
1347 | add_timer(&udc_pollstall_timer); | |
1348 | } | |
1349 | } | |
1350 | } | |
1351 | } else { | |
1352 | /* ep is halted by set_halt() before */ | |
1353 | if (ep->halted) { | |
1354 | tmp = readl(&ep->regs->ctl); | |
1355 | /* clear stall bit */ | |
1356 | tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); | |
1357 | /* clear NAK by writing CNAK */ | |
1358 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1359 | writel(tmp, &ep->regs->ctl); | |
1360 | ep->halted = 0; | |
1361 | UDC_QUEUE_CNAK(ep, ep->num); | |
1362 | } | |
1363 | } | |
1364 | spin_unlock_irqrestore(&udc_stall_spinlock, iflags); | |
1365 | return retval; | |
1366 | } | |
1367 | ||
1368 | /* gadget interface */ | |
1369 | static const struct usb_ep_ops udc_ep_ops = { | |
1370 | .enable = udc_ep_enable, | |
1371 | .disable = udc_ep_disable, | |
1372 | ||
1373 | .alloc_request = udc_alloc_request, | |
1374 | .free_request = udc_free_request, | |
1375 | ||
1376 | .queue = udc_queue, | |
1377 | .dequeue = udc_dequeue, | |
1378 | ||
1379 | .set_halt = udc_set_halt, | |
1380 | /* fifo ops not implemented */ | |
1381 | }; | |
1382 | ||
1383 | /*-------------------------------------------------------------------------*/ | |
1384 | ||
1385 | /* Get frame counter (not implemented) */ | |
1386 | static int udc_get_frame(struct usb_gadget *gadget) | |
1387 | { | |
1388 | return -EOPNOTSUPP; | |
1389 | } | |
1390 | ||
1391 | /* Remote wakeup gadget interface */ | |
1392 | static int udc_wakeup(struct usb_gadget *gadget) | |
1393 | { | |
1394 | struct udc *dev; | |
1395 | ||
1396 | if (!gadget) | |
1397 | return -EINVAL; | |
1398 | dev = container_of(gadget, struct udc, gadget); | |
1399 | udc_remote_wakeup(dev); | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
0f91349b SAS |
1404 | static int amd5536_start(struct usb_gadget_driver *driver, |
1405 | int (*bind)(struct usb_gadget *)); | |
1406 | static int amd5536_stop(struct usb_gadget_driver *driver); | |
55d402d8 TD |
1407 | /* gadget operations */ |
1408 | static const struct usb_gadget_ops udc_ops = { | |
1409 | .wakeup = udc_wakeup, | |
1410 | .get_frame = udc_get_frame, | |
0f91349b SAS |
1411 | .start = amd5536_start, |
1412 | .stop = amd5536_stop, | |
55d402d8 TD |
1413 | }; |
1414 | ||
1415 | /* Setups endpoint parameters, adds endpoints to linked list */ | |
1416 | static void make_ep_lists(struct udc *dev) | |
1417 | { | |
1418 | /* make gadget ep lists */ | |
1419 | INIT_LIST_HEAD(&dev->gadget.ep_list); | |
1420 | list_add_tail(&dev->ep[UDC_EPIN_STATUS_IX].ep.ep_list, | |
1421 | &dev->gadget.ep_list); | |
1422 | list_add_tail(&dev->ep[UDC_EPIN_IX].ep.ep_list, | |
1423 | &dev->gadget.ep_list); | |
1424 | list_add_tail(&dev->ep[UDC_EPOUT_IX].ep.ep_list, | |
1425 | &dev->gadget.ep_list); | |
1426 | ||
1427 | /* fifo config */ | |
1428 | dev->ep[UDC_EPIN_STATUS_IX].fifo_depth = UDC_EPIN_SMALLINT_BUFF_SIZE; | |
1429 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1430 | dev->ep[UDC_EPIN_IX].fifo_depth = UDC_FS_EPIN_BUFF_SIZE; | |
1431 | else if (dev->gadget.speed == USB_SPEED_HIGH) | |
1432 | dev->ep[UDC_EPIN_IX].fifo_depth = hs_tx_buf; | |
1433 | dev->ep[UDC_EPOUT_IX].fifo_depth = UDC_RXFIFO_SIZE; | |
1434 | } | |
1435 | ||
1436 | /* init registers at driver load time */ | |
1437 | static int startup_registers(struct udc *dev) | |
1438 | { | |
1439 | u32 tmp; | |
1440 | ||
1441 | /* init controller by soft reset */ | |
1442 | udc_soft_reset(dev); | |
1443 | ||
1444 | /* mask not needed interrupts */ | |
1445 | udc_mask_unused_interrupts(dev); | |
1446 | ||
1447 | /* put into initial config */ | |
1448 | udc_basic_init(dev); | |
1449 | /* link up all endpoints */ | |
1450 | udc_setup_endpoints(dev); | |
1451 | ||
1452 | /* program speed */ | |
1453 | tmp = readl(&dev->regs->cfg); | |
170b778f | 1454 | if (use_fullspeed) |
55d402d8 | 1455 | tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_FS, UDC_DEVCFG_SPD); |
170b778f | 1456 | else |
55d402d8 | 1457 | tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_HS, UDC_DEVCFG_SPD); |
55d402d8 TD |
1458 | writel(tmp, &dev->regs->cfg); |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
1463 | /* Inits UDC context */ | |
1464 | static void udc_basic_init(struct udc *dev) | |
1465 | { | |
1466 | u32 tmp; | |
1467 | ||
1468 | DBG(dev, "udc_basic_init()\n"); | |
1469 | ||
1470 | dev->gadget.speed = USB_SPEED_UNKNOWN; | |
1471 | ||
1472 | /* stop RDE timer */ | |
1473 | if (timer_pending(&udc_timer)) { | |
1474 | set_rde = 0; | |
1475 | mod_timer(&udc_timer, jiffies - 1); | |
1476 | } | |
1477 | /* stop poll stall timer */ | |
170b778f | 1478 | if (timer_pending(&udc_pollstall_timer)) |
55d402d8 | 1479 | mod_timer(&udc_pollstall_timer, jiffies - 1); |
55d402d8 TD |
1480 | /* disable DMA */ |
1481 | tmp = readl(&dev->regs->ctl); | |
1482 | tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_RDE); | |
1483 | tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_TDE); | |
1484 | writel(tmp, &dev->regs->ctl); | |
1485 | ||
1486 | /* enable dynamic CSR programming */ | |
1487 | tmp = readl(&dev->regs->cfg); | |
1488 | tmp |= AMD_BIT(UDC_DEVCFG_CSR_PRG); | |
1489 | /* set self powered */ | |
1490 | tmp |= AMD_BIT(UDC_DEVCFG_SP); | |
1491 | /* set remote wakeupable */ | |
1492 | tmp |= AMD_BIT(UDC_DEVCFG_RWKP); | |
1493 | writel(tmp, &dev->regs->cfg); | |
1494 | ||
1495 | make_ep_lists(dev); | |
1496 | ||
1497 | dev->data_ep_enabled = 0; | |
1498 | dev->data_ep_queued = 0; | |
1499 | } | |
1500 | ||
1501 | /* Sets initial endpoint parameters */ | |
1502 | static void udc_setup_endpoints(struct udc *dev) | |
1503 | { | |
1504 | struct udc_ep *ep; | |
1505 | u32 tmp; | |
1506 | u32 reg; | |
1507 | ||
1508 | DBG(dev, "udc_setup_endpoints()\n"); | |
1509 | ||
1510 | /* read enum speed */ | |
1511 | tmp = readl(&dev->regs->sts); | |
1512 | tmp = AMD_GETBITS(tmp, UDC_DEVSTS_ENUM_SPEED); | |
170b778f | 1513 | if (tmp == UDC_DEVSTS_ENUM_SPEED_HIGH) |
55d402d8 | 1514 | dev->gadget.speed = USB_SPEED_HIGH; |
170b778f | 1515 | else if (tmp == UDC_DEVSTS_ENUM_SPEED_FULL) |
55d402d8 | 1516 | dev->gadget.speed = USB_SPEED_FULL; |
55d402d8 TD |
1517 | |
1518 | /* set basic ep parameters */ | |
1519 | for (tmp = 0; tmp < UDC_EP_NUM; tmp++) { | |
1520 | ep = &dev->ep[tmp]; | |
1521 | ep->dev = dev; | |
1522 | ep->ep.name = ep_string[tmp]; | |
1523 | ep->num = tmp; | |
1524 | /* txfifo size is calculated at enable time */ | |
1525 | ep->txfifo = dev->txfifo; | |
1526 | ||
1527 | /* fifo size */ | |
1528 | if (tmp < UDC_EPIN_NUM) { | |
1529 | ep->fifo_depth = UDC_TXFIFO_SIZE; | |
1530 | ep->in = 1; | |
1531 | } else { | |
1532 | ep->fifo_depth = UDC_RXFIFO_SIZE; | |
1533 | ep->in = 0; | |
1534 | ||
1535 | } | |
1536 | ep->regs = &dev->ep_regs[tmp]; | |
1537 | /* | |
1538 | * ep will be reset only if ep was not enabled before to avoid | |
1539 | * disabling ep interrupts when ENUM interrupt occurs but ep is | |
1540 | * not enabled by gadget driver | |
1541 | */ | |
170b778f | 1542 | if (!ep->desc) |
55d402d8 | 1543 | ep_init(dev->regs, ep); |
55d402d8 TD |
1544 | |
1545 | if (use_dma) { | |
1546 | /* | |
1547 | * ep->dma is not really used, just to indicate that | |
1548 | * DMA is active: remove this | |
1549 | * dma regs = dev control regs | |
1550 | */ | |
1551 | ep->dma = &dev->regs->ctl; | |
1552 | ||
1553 | /* nak OUT endpoints until enable - not for ep0 */ | |
1554 | if (tmp != UDC_EP0IN_IX && tmp != UDC_EP0OUT_IX | |
1555 | && tmp > UDC_EPIN_NUM) { | |
1556 | /* set NAK */ | |
1557 | reg = readl(&dev->ep[tmp].regs->ctl); | |
1558 | reg |= AMD_BIT(UDC_EPCTL_SNAK); | |
1559 | writel(reg, &dev->ep[tmp].regs->ctl); | |
1560 | dev->ep[tmp].naking = 1; | |
1561 | ||
1562 | } | |
1563 | } | |
1564 | } | |
1565 | /* EP0 max packet */ | |
1566 | if (dev->gadget.speed == USB_SPEED_FULL) { | |
1567 | dev->ep[UDC_EP0IN_IX].ep.maxpacket = UDC_FS_EP0IN_MAX_PKT_SIZE; | |
1568 | dev->ep[UDC_EP0OUT_IX].ep.maxpacket = | |
1569 | UDC_FS_EP0OUT_MAX_PKT_SIZE; | |
1570 | } else if (dev->gadget.speed == USB_SPEED_HIGH) { | |
1571 | dev->ep[UDC_EP0IN_IX].ep.maxpacket = UDC_EP0IN_MAX_PKT_SIZE; | |
1572 | dev->ep[UDC_EP0OUT_IX].ep.maxpacket = UDC_EP0OUT_MAX_PKT_SIZE; | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * with suspend bug workaround, ep0 params for gadget driver | |
1577 | * are set at gadget driver bind() call | |
1578 | */ | |
1579 | dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IX].ep; | |
1580 | dev->ep[UDC_EP0IN_IX].halted = 0; | |
1581 | INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); | |
1582 | ||
1583 | /* init cfg/alt/int */ | |
1584 | dev->cur_config = 0; | |
1585 | dev->cur_intf = 0; | |
1586 | dev->cur_alt = 0; | |
1587 | } | |
1588 | ||
1589 | /* Bringup after Connect event, initial bringup to be ready for ep0 events */ | |
1590 | static void usb_connect(struct udc *dev) | |
1591 | { | |
1592 | ||
1593 | dev_info(&dev->pdev->dev, "USB Connect\n"); | |
1594 | ||
1595 | dev->connected = 1; | |
1596 | ||
1597 | /* put into initial config */ | |
1598 | udc_basic_init(dev); | |
1599 | ||
1600 | /* enable device setup interrupts */ | |
1601 | udc_enable_dev_setup_interrupts(dev); | |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Calls gadget with disconnect event and resets the UDC and makes | |
1606 | * initial bringup to be ready for ep0 events | |
1607 | */ | |
1608 | static void usb_disconnect(struct udc *dev) | |
1609 | { | |
1610 | ||
1611 | dev_info(&dev->pdev->dev, "USB Disconnect\n"); | |
1612 | ||
1613 | dev->connected = 0; | |
1614 | ||
1615 | /* mask interrupts */ | |
1616 | udc_mask_unused_interrupts(dev); | |
1617 | ||
1618 | /* REVISIT there doesn't seem to be a point to having this | |
1619 | * talk to a tasklet ... do it directly, we already hold | |
1620 | * the spinlock needed to process the disconnect. | |
1621 | */ | |
1622 | ||
1623 | tasklet_schedule(&disconnect_tasklet); | |
1624 | } | |
1625 | ||
1626 | /* Tasklet for disconnect to be outside of interrupt context */ | |
1627 | static void udc_tasklet_disconnect(unsigned long par) | |
1628 | { | |
1629 | struct udc *dev = (struct udc *)(*((struct udc **) par)); | |
1630 | u32 tmp; | |
1631 | ||
1632 | DBG(dev, "Tasklet disconnect\n"); | |
1633 | spin_lock_irq(&dev->lock); | |
1634 | ||
1635 | if (dev->driver) { | |
1636 | spin_unlock(&dev->lock); | |
1637 | dev->driver->disconnect(&dev->gadget); | |
1638 | spin_lock(&dev->lock); | |
1639 | ||
1640 | /* empty queues */ | |
170b778f | 1641 | for (tmp = 0; tmp < UDC_EP_NUM; tmp++) |
55d402d8 | 1642 | empty_req_queue(&dev->ep[tmp]); |
55d402d8 TD |
1643 | |
1644 | } | |
1645 | ||
1646 | /* disable ep0 */ | |
1647 | ep_init(dev->regs, | |
1648 | &dev->ep[UDC_EP0IN_IX]); | |
1649 | ||
1650 | ||
1651 | if (!soft_reset_occured) { | |
1652 | /* init controller by soft reset */ | |
1653 | udc_soft_reset(dev); | |
1654 | soft_reset_occured++; | |
1655 | } | |
1656 | ||
1657 | /* re-enable dev interrupts */ | |
1658 | udc_enable_dev_setup_interrupts(dev); | |
1659 | /* back to full speed ? */ | |
1660 | if (use_fullspeed) { | |
1661 | tmp = readl(&dev->regs->cfg); | |
1662 | tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_FS, UDC_DEVCFG_SPD); | |
1663 | writel(tmp, &dev->regs->cfg); | |
1664 | } | |
1665 | ||
1666 | spin_unlock_irq(&dev->lock); | |
1667 | } | |
1668 | ||
1669 | /* Reset the UDC core */ | |
1670 | static void udc_soft_reset(struct udc *dev) | |
1671 | { | |
1672 | unsigned long flags; | |
1673 | ||
1674 | DBG(dev, "Soft reset\n"); | |
1675 | /* | |
1676 | * reset possible waiting interrupts, because int. | |
1677 | * status is lost after soft reset, | |
1678 | * ep int. status reset | |
1679 | */ | |
1680 | writel(UDC_EPINT_MSK_DISABLE_ALL, &dev->regs->ep_irqsts); | |
1681 | /* device int. status reset */ | |
1682 | writel(UDC_DEV_MSK_DISABLE, &dev->regs->irqsts); | |
1683 | ||
1684 | spin_lock_irqsave(&udc_irq_spinlock, flags); | |
1685 | writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); | |
1686 | readl(&dev->regs->cfg); | |
1687 | spin_unlock_irqrestore(&udc_irq_spinlock, flags); | |
1688 | ||
1689 | } | |
1690 | ||
1691 | /* RDE timer callback to set RDE bit */ | |
1692 | static void udc_timer_function(unsigned long v) | |
1693 | { | |
1694 | u32 tmp; | |
1695 | ||
1696 | spin_lock_irq(&udc_irq_spinlock); | |
1697 | ||
1698 | if (set_rde > 0) { | |
1699 | /* | |
1700 | * open the fifo if fifo was filled on last timer call | |
1701 | * conditionally | |
1702 | */ | |
1703 | if (set_rde > 1) { | |
1704 | /* set RDE to receive setup data */ | |
1705 | tmp = readl(&udc->regs->ctl); | |
1706 | tmp |= AMD_BIT(UDC_DEVCTL_RDE); | |
1707 | writel(tmp, &udc->regs->ctl); | |
1708 | set_rde = -1; | |
1709 | } else if (readl(&udc->regs->sts) | |
1710 | & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) { | |
1711 | /* | |
1712 | * if fifo empty setup polling, do not just | |
1713 | * open the fifo | |
1714 | */ | |
1715 | udc_timer.expires = jiffies + HZ/UDC_RDE_TIMER_DIV; | |
170b778f | 1716 | if (!stop_timer) |
55d402d8 | 1717 | add_timer(&udc_timer); |
55d402d8 TD |
1718 | } else { |
1719 | /* | |
1720 | * fifo contains data now, setup timer for opening | |
1721 | * the fifo when timer expires to be able to receive | |
1722 | * setup packets, when data packets gets queued by | |
1723 | * gadget layer then timer will forced to expire with | |
1724 | * set_rde=0 (RDE is set in udc_queue()) | |
1725 | */ | |
1726 | set_rde++; | |
1727 | /* debug: lhadmot_timer_start = 221070 */ | |
1728 | udc_timer.expires = jiffies + HZ*UDC_RDE_TIMER_SECONDS; | |
170b778f | 1729 | if (!stop_timer) |
55d402d8 | 1730 | add_timer(&udc_timer); |
55d402d8 TD |
1731 | } |
1732 | ||
1733 | } else | |
1734 | set_rde = -1; /* RDE was set by udc_queue() */ | |
1735 | spin_unlock_irq(&udc_irq_spinlock); | |
1736 | if (stop_timer) | |
1737 | complete(&on_exit); | |
1738 | ||
1739 | } | |
1740 | ||
1741 | /* Handle halt state, used in stall poll timer */ | |
1742 | static void udc_handle_halt_state(struct udc_ep *ep) | |
1743 | { | |
1744 | u32 tmp; | |
1745 | /* set stall as long not halted */ | |
1746 | if (ep->halted == 1) { | |
1747 | tmp = readl(&ep->regs->ctl); | |
1748 | /* STALL cleared ? */ | |
1749 | if (!(tmp & AMD_BIT(UDC_EPCTL_S))) { | |
1750 | /* | |
1751 | * FIXME: MSC spec requires that stall remains | |
1752 | * even on receivng of CLEAR_FEATURE HALT. So | |
1753 | * we would set STALL again here to be compliant. | |
1754 | * But with current mass storage drivers this does | |
1755 | * not work (would produce endless host retries). | |
1756 | * So we clear halt on CLEAR_FEATURE. | |
1757 | * | |
1758 | DBG(ep->dev, "ep %d: set STALL again\n", ep->num); | |
1759 | tmp |= AMD_BIT(UDC_EPCTL_S); | |
1760 | writel(tmp, &ep->regs->ctl);*/ | |
1761 | ||
1762 | /* clear NAK by writing CNAK */ | |
1763 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1764 | writel(tmp, &ep->regs->ctl); | |
1765 | ep->halted = 0; | |
1766 | UDC_QUEUE_CNAK(ep, ep->num); | |
1767 | } | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* Stall timer callback to poll S bit and set it again after */ | |
1772 | static void udc_pollstall_timer_function(unsigned long v) | |
1773 | { | |
1774 | struct udc_ep *ep; | |
1775 | int halted = 0; | |
1776 | ||
1777 | spin_lock_irq(&udc_stall_spinlock); | |
1778 | /* | |
1779 | * only one IN and OUT endpoints are handled | |
1780 | * IN poll stall | |
1781 | */ | |
1782 | ep = &udc->ep[UDC_EPIN_IX]; | |
1783 | udc_handle_halt_state(ep); | |
1784 | if (ep->halted) | |
1785 | halted = 1; | |
1786 | /* OUT poll stall */ | |
1787 | ep = &udc->ep[UDC_EPOUT_IX]; | |
1788 | udc_handle_halt_state(ep); | |
1789 | if (ep->halted) | |
1790 | halted = 1; | |
1791 | ||
1792 | /* setup timer again when still halted */ | |
1793 | if (!stop_pollstall_timer && halted) { | |
1794 | udc_pollstall_timer.expires = jiffies + | |
1795 | HZ * UDC_POLLSTALL_TIMER_USECONDS | |
1796 | / (1000 * 1000); | |
1797 | add_timer(&udc_pollstall_timer); | |
1798 | } | |
1799 | spin_unlock_irq(&udc_stall_spinlock); | |
1800 | ||
1801 | if (stop_pollstall_timer) | |
1802 | complete(&on_pollstall_exit); | |
1803 | } | |
1804 | ||
1805 | /* Inits endpoint 0 so that SETUP packets are processed */ | |
1806 | static void activate_control_endpoints(struct udc *dev) | |
1807 | { | |
1808 | u32 tmp; | |
1809 | ||
1810 | DBG(dev, "activate_control_endpoints\n"); | |
1811 | ||
1812 | /* flush fifo */ | |
1813 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1814 | tmp |= AMD_BIT(UDC_EPCTL_F); | |
1815 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1816 | ||
1817 | /* set ep0 directions */ | |
1818 | dev->ep[UDC_EP0IN_IX].in = 1; | |
1819 | dev->ep[UDC_EP0OUT_IX].in = 0; | |
1820 | ||
1821 | /* set buffer size (tx fifo entries) of EP0_IN */ | |
1822 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->bufin_framenum); | |
1823 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1824 | tmp = AMD_ADDBITS(tmp, UDC_FS_EPIN0_BUFF_SIZE, | |
1825 | UDC_EPIN_BUFF_SIZE); | |
1826 | else if (dev->gadget.speed == USB_SPEED_HIGH) | |
1827 | tmp = AMD_ADDBITS(tmp, UDC_EPIN0_BUFF_SIZE, | |
1828 | UDC_EPIN_BUFF_SIZE); | |
1829 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->bufin_framenum); | |
1830 | ||
1831 | /* set max packet size of EP0_IN */ | |
1832 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->bufout_maxpkt); | |
1833 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1834 | tmp = AMD_ADDBITS(tmp, UDC_FS_EP0IN_MAX_PKT_SIZE, | |
1835 | UDC_EP_MAX_PKT_SIZE); | |
1836 | else if (dev->gadget.speed == USB_SPEED_HIGH) | |
1837 | tmp = AMD_ADDBITS(tmp, UDC_EP0IN_MAX_PKT_SIZE, | |
1838 | UDC_EP_MAX_PKT_SIZE); | |
1839 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->bufout_maxpkt); | |
1840 | ||
1841 | /* set max packet size of EP0_OUT */ | |
1842 | tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->bufout_maxpkt); | |
1843 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1844 | tmp = AMD_ADDBITS(tmp, UDC_FS_EP0OUT_MAX_PKT_SIZE, | |
1845 | UDC_EP_MAX_PKT_SIZE); | |
1846 | else if (dev->gadget.speed == USB_SPEED_HIGH) | |
1847 | tmp = AMD_ADDBITS(tmp, UDC_EP0OUT_MAX_PKT_SIZE, | |
1848 | UDC_EP_MAX_PKT_SIZE); | |
1849 | writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->bufout_maxpkt); | |
1850 | ||
1851 | /* set max packet size of EP0 in UDC CSR */ | |
1852 | tmp = readl(&dev->csr->ne[0]); | |
1853 | if (dev->gadget.speed == USB_SPEED_FULL) | |
1854 | tmp = AMD_ADDBITS(tmp, UDC_FS_EP0OUT_MAX_PKT_SIZE, | |
1855 | UDC_CSR_NE_MAX_PKT); | |
1856 | else if (dev->gadget.speed == USB_SPEED_HIGH) | |
1857 | tmp = AMD_ADDBITS(tmp, UDC_EP0OUT_MAX_PKT_SIZE, | |
1858 | UDC_CSR_NE_MAX_PKT); | |
1859 | writel(tmp, &dev->csr->ne[0]); | |
1860 | ||
1861 | if (use_dma) { | |
1862 | dev->ep[UDC_EP0OUT_IX].td->status |= | |
1863 | AMD_BIT(UDC_DMA_OUT_STS_L); | |
1864 | /* write dma desc address */ | |
1865 | writel(dev->ep[UDC_EP0OUT_IX].td_stp_dma, | |
1866 | &dev->ep[UDC_EP0OUT_IX].regs->subptr); | |
1867 | writel(dev->ep[UDC_EP0OUT_IX].td_phys, | |
1868 | &dev->ep[UDC_EP0OUT_IX].regs->desptr); | |
1869 | /* stop RDE timer */ | |
1870 | if (timer_pending(&udc_timer)) { | |
1871 | set_rde = 0; | |
1872 | mod_timer(&udc_timer, jiffies - 1); | |
1873 | } | |
1874 | /* stop pollstall timer */ | |
170b778f | 1875 | if (timer_pending(&udc_pollstall_timer)) |
55d402d8 | 1876 | mod_timer(&udc_pollstall_timer, jiffies - 1); |
55d402d8 TD |
1877 | /* enable DMA */ |
1878 | tmp = readl(&dev->regs->ctl); | |
1879 | tmp |= AMD_BIT(UDC_DEVCTL_MODE) | |
1880 | | AMD_BIT(UDC_DEVCTL_RDE) | |
1881 | | AMD_BIT(UDC_DEVCTL_TDE); | |
170b778f | 1882 | if (use_dma_bufferfill_mode) |
55d402d8 | 1883 | tmp |= AMD_BIT(UDC_DEVCTL_BF); |
170b778f | 1884 | else if (use_dma_ppb_du) |
55d402d8 | 1885 | tmp |= AMD_BIT(UDC_DEVCTL_DU); |
55d402d8 TD |
1886 | writel(tmp, &dev->regs->ctl); |
1887 | } | |
1888 | ||
1889 | /* clear NAK by writing CNAK for EP0IN */ | |
1890 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1891 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1892 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
1893 | dev->ep[UDC_EP0IN_IX].naking = 0; | |
1894 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], UDC_EP0IN_IX); | |
1895 | ||
1896 | /* clear NAK by writing CNAK for EP0OUT */ | |
1897 | tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
1898 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
1899 | writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
1900 | dev->ep[UDC_EP0OUT_IX].naking = 0; | |
1901 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], UDC_EP0OUT_IX); | |
1902 | } | |
1903 | ||
1904 | /* Make endpoint 0 ready for control traffic */ | |
1905 | static int setup_ep0(struct udc *dev) | |
1906 | { | |
1907 | activate_control_endpoints(dev); | |
1908 | /* enable ep0 interrupts */ | |
1909 | udc_enable_ep0_interrupts(dev); | |
1910 | /* enable device setup interrupts */ | |
1911 | udc_enable_dev_setup_interrupts(dev); | |
1912 | ||
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | /* Called by gadget driver to register itself */ | |
0f91349b | 1917 | static int amd5536_start(struct usb_gadget_driver *driver, |
b0fca50f | 1918 | int (*bind)(struct usb_gadget *)) |
55d402d8 TD |
1919 | { |
1920 | struct udc *dev = udc; | |
1921 | int retval; | |
1922 | u32 tmp; | |
1923 | ||
b0fca50f | 1924 | if (!driver || !bind || !driver->setup |
7177aed4 | 1925 | || driver->max_speed < USB_SPEED_HIGH) |
55d402d8 TD |
1926 | return -EINVAL; |
1927 | if (!dev) | |
1928 | return -ENODEV; | |
1929 | if (dev->driver) | |
1930 | return -EBUSY; | |
1931 | ||
1932 | driver->driver.bus = NULL; | |
1933 | dev->driver = driver; | |
1934 | dev->gadget.dev.driver = &driver->driver; | |
1935 | ||
b0fca50f | 1936 | retval = bind(&dev->gadget); |
55d402d8 TD |
1937 | |
1938 | /* Some gadget drivers use both ep0 directions. | |
1939 | * NOTE: to gadget driver, ep0 is just one endpoint... | |
1940 | */ | |
1941 | dev->ep[UDC_EP0OUT_IX].ep.driver_data = | |
1942 | dev->ep[UDC_EP0IN_IX].ep.driver_data; | |
1943 | ||
1944 | if (retval) { | |
1945 | DBG(dev, "binding to %s returning %d\n", | |
1946 | driver->driver.name, retval); | |
1947 | dev->driver = NULL; | |
1948 | dev->gadget.dev.driver = NULL; | |
1949 | return retval; | |
1950 | } | |
1951 | ||
1952 | /* get ready for ep0 traffic */ | |
1953 | setup_ep0(dev); | |
1954 | ||
1955 | /* clear SD */ | |
1956 | tmp = readl(&dev->regs->ctl); | |
1957 | tmp = tmp & AMD_CLEAR_BIT(UDC_DEVCTL_SD); | |
1958 | writel(tmp, &dev->regs->ctl); | |
1959 | ||
1960 | usb_connect(dev); | |
1961 | ||
1962 | return 0; | |
1963 | } | |
55d402d8 TD |
1964 | |
1965 | /* shutdown requests and disconnect from gadget */ | |
1966 | static void | |
1967 | shutdown(struct udc *dev, struct usb_gadget_driver *driver) | |
1968 | __releases(dev->lock) | |
1969 | __acquires(dev->lock) | |
1970 | { | |
1971 | int tmp; | |
1972 | ||
55d402d8 TD |
1973 | if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
1974 | spin_unlock(&dev->lock); | |
1975 | driver->disconnect(&dev->gadget); | |
1976 | spin_lock(&dev->lock); | |
1977 | } | |
c5deb832 TD |
1978 | |
1979 | /* empty queues and init hardware */ | |
1980 | udc_basic_init(dev); | |
1981 | for (tmp = 0; tmp < UDC_EP_NUM; tmp++) | |
1982 | empty_req_queue(&dev->ep[tmp]); | |
1983 | ||
55d402d8 TD |
1984 | udc_setup_endpoints(dev); |
1985 | } | |
1986 | ||
1987 | /* Called by gadget driver to unregister itself */ | |
0f91349b | 1988 | static int amd5536_stop(struct usb_gadget_driver *driver) |
55d402d8 TD |
1989 | { |
1990 | struct udc *dev = udc; | |
1991 | unsigned long flags; | |
1992 | u32 tmp; | |
1993 | ||
1994 | if (!dev) | |
1995 | return -ENODEV; | |
1996 | if (!driver || driver != dev->driver || !driver->unbind) | |
1997 | return -EINVAL; | |
1998 | ||
1999 | spin_lock_irqsave(&dev->lock, flags); | |
2000 | udc_mask_unused_interrupts(dev); | |
2001 | shutdown(dev, driver); | |
2002 | spin_unlock_irqrestore(&dev->lock, flags); | |
2003 | ||
2004 | driver->unbind(&dev->gadget); | |
eb0be47d | 2005 | dev->gadget.dev.driver = NULL; |
55d402d8 TD |
2006 | dev->driver = NULL; |
2007 | ||
2008 | /* set SD */ | |
2009 | tmp = readl(&dev->regs->ctl); | |
2010 | tmp |= AMD_BIT(UDC_DEVCTL_SD); | |
2011 | writel(tmp, &dev->regs->ctl); | |
2012 | ||
2013 | ||
2014 | DBG(dev, "%s: unregistered\n", driver->driver.name); | |
2015 | ||
2016 | return 0; | |
2017 | } | |
55d402d8 TD |
2018 | |
2019 | /* Clear pending NAK bits */ | |
2020 | static void udc_process_cnak_queue(struct udc *dev) | |
2021 | { | |
2022 | u32 tmp; | |
2023 | u32 reg; | |
2024 | ||
2025 | /* check epin's */ | |
2026 | DBG(dev, "CNAK pending queue processing\n"); | |
2027 | for (tmp = 0; tmp < UDC_EPIN_NUM_USED; tmp++) { | |
2028 | if (cnak_pending & (1 << tmp)) { | |
2029 | DBG(dev, "CNAK pending for ep%d\n", tmp); | |
2030 | /* clear NAK by writing CNAK */ | |
2031 | reg = readl(&dev->ep[tmp].regs->ctl); | |
2032 | reg |= AMD_BIT(UDC_EPCTL_CNAK); | |
2033 | writel(reg, &dev->ep[tmp].regs->ctl); | |
2034 | dev->ep[tmp].naking = 0; | |
2035 | UDC_QUEUE_CNAK(&dev->ep[tmp], dev->ep[tmp].num); | |
2036 | } | |
2037 | } | |
2038 | /* ... and ep0out */ | |
2039 | if (cnak_pending & (1 << UDC_EP0OUT_IX)) { | |
2040 | DBG(dev, "CNAK pending for ep%d\n", UDC_EP0OUT_IX); | |
2041 | /* clear NAK by writing CNAK */ | |
2042 | reg = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
2043 | reg |= AMD_BIT(UDC_EPCTL_CNAK); | |
2044 | writel(reg, &dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
2045 | dev->ep[UDC_EP0OUT_IX].naking = 0; | |
2046 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], | |
2047 | dev->ep[UDC_EP0OUT_IX].num); | |
2048 | } | |
2049 | } | |
2050 | ||
2051 | /* Enabling RX DMA after setup packet */ | |
2052 | static void udc_ep0_set_rde(struct udc *dev) | |
2053 | { | |
2054 | if (use_dma) { | |
2055 | /* | |
2056 | * only enable RXDMA when no data endpoint enabled | |
2057 | * or data is queued | |
2058 | */ | |
2059 | if (!dev->data_ep_enabled || dev->data_ep_queued) { | |
2060 | udc_set_rde(dev); | |
2061 | } else { | |
2062 | /* | |
2063 | * setup timer for enabling RDE (to not enable | |
2064 | * RXFIFO DMA for data endpoints to early) | |
2065 | */ | |
2066 | if (set_rde != 0 && !timer_pending(&udc_timer)) { | |
2067 | udc_timer.expires = | |
2068 | jiffies + HZ/UDC_RDE_TIMER_DIV; | |
2069 | set_rde = 1; | |
170b778f | 2070 | if (!stop_timer) |
55d402d8 | 2071 | add_timer(&udc_timer); |
55d402d8 TD |
2072 | } |
2073 | } | |
2074 | } | |
2075 | } | |
2076 | ||
2077 | ||
2078 | /* Interrupt handler for data OUT traffic */ | |
2079 | static irqreturn_t udc_data_out_isr(struct udc *dev, int ep_ix) | |
2080 | { | |
2081 | irqreturn_t ret_val = IRQ_NONE; | |
2082 | u32 tmp; | |
2083 | struct udc_ep *ep; | |
2084 | struct udc_request *req; | |
2085 | unsigned int count; | |
2086 | struct udc_data_dma *td = NULL; | |
2087 | unsigned dma_done; | |
2088 | ||
2089 | VDBG(dev, "ep%d irq\n", ep_ix); | |
2090 | ep = &dev->ep[ep_ix]; | |
2091 | ||
2092 | tmp = readl(&ep->regs->sts); | |
2093 | if (use_dma) { | |
2094 | /* BNA event ? */ | |
2095 | if (tmp & AMD_BIT(UDC_EPSTS_BNA)) { | |
5647a149 | 2096 | DBG(dev, "BNA ep%dout occurred - DESPTR = %x\n", |
55d402d8 TD |
2097 | ep->num, readl(&ep->regs->desptr)); |
2098 | /* clear BNA */ | |
2099 | writel(tmp | AMD_BIT(UDC_EPSTS_BNA), &ep->regs->sts); | |
2100 | if (!ep->cancel_transfer) | |
2101 | ep->bna_occurred = 1; | |
2102 | else | |
2103 | ep->cancel_transfer = 0; | |
2104 | ret_val = IRQ_HANDLED; | |
2105 | goto finished; | |
2106 | } | |
2107 | } | |
2108 | /* HE event ? */ | |
2109 | if (tmp & AMD_BIT(UDC_EPSTS_HE)) { | |
25985edc | 2110 | dev_err(&dev->pdev->dev, "HE ep%dout occurred\n", ep->num); |
55d402d8 TD |
2111 | |
2112 | /* clear HE */ | |
2113 | writel(tmp | AMD_BIT(UDC_EPSTS_HE), &ep->regs->sts); | |
2114 | ret_val = IRQ_HANDLED; | |
2115 | goto finished; | |
2116 | } | |
2117 | ||
2118 | if (!list_empty(&ep->queue)) { | |
2119 | ||
2120 | /* next request */ | |
2121 | req = list_entry(ep->queue.next, | |
2122 | struct udc_request, queue); | |
2123 | } else { | |
2124 | req = NULL; | |
2125 | udc_rxfifo_pending = 1; | |
2126 | } | |
2127 | VDBG(dev, "req = %p\n", req); | |
2128 | /* fifo mode */ | |
2129 | if (!use_dma) { | |
2130 | ||
2131 | /* read fifo */ | |
2132 | if (req && udc_rxfifo_read(ep, req)) { | |
2133 | ret_val = IRQ_HANDLED; | |
2134 | ||
2135 | /* finish */ | |
2136 | complete_req(ep, req, 0); | |
2137 | /* next request */ | |
2138 | if (!list_empty(&ep->queue) && !ep->halted) { | |
2139 | req = list_entry(ep->queue.next, | |
2140 | struct udc_request, queue); | |
2141 | } else | |
2142 | req = NULL; | |
2143 | } | |
2144 | ||
2145 | /* DMA */ | |
2146 | } else if (!ep->cancel_transfer && req != NULL) { | |
2147 | ret_val = IRQ_HANDLED; | |
2148 | ||
2149 | /* check for DMA done */ | |
2150 | if (!use_dma_ppb) { | |
2151 | dma_done = AMD_GETBITS(req->td_data->status, | |
2152 | UDC_DMA_OUT_STS_BS); | |
2153 | /* packet per buffer mode - rx bytes */ | |
2154 | } else { | |
2155 | /* | |
2156 | * if BNA occurred then recover desc. from | |
2157 | * BNA dummy desc. | |
2158 | */ | |
2159 | if (ep->bna_occurred) { | |
2160 | VDBG(dev, "Recover desc. from BNA dummy\n"); | |
2161 | memcpy(req->td_data, ep->bna_dummy_req->td_data, | |
2162 | sizeof(struct udc_data_dma)); | |
2163 | ep->bna_occurred = 0; | |
2164 | udc_init_bna_dummy(ep->req); | |
2165 | } | |
2166 | td = udc_get_last_dma_desc(req); | |
2167 | dma_done = AMD_GETBITS(td->status, UDC_DMA_OUT_STS_BS); | |
2168 | } | |
2169 | if (dma_done == UDC_DMA_OUT_STS_BS_DMA_DONE) { | |
2170 | /* buffer fill mode - rx bytes */ | |
2171 | if (!use_dma_ppb) { | |
2172 | /* received number bytes */ | |
2173 | count = AMD_GETBITS(req->td_data->status, | |
2174 | UDC_DMA_OUT_STS_RXBYTES); | |
2175 | VDBG(dev, "rx bytes=%u\n", count); | |
2176 | /* packet per buffer mode - rx bytes */ | |
2177 | } else { | |
2178 | VDBG(dev, "req->td_data=%p\n", req->td_data); | |
2179 | VDBG(dev, "last desc = %p\n", td); | |
2180 | /* received number bytes */ | |
2181 | if (use_dma_ppb_du) { | |
2182 | /* every desc. counts bytes */ | |
2183 | count = udc_get_ppbdu_rxbytes(req); | |
2184 | } else { | |
2185 | /* last desc. counts bytes */ | |
2186 | count = AMD_GETBITS(td->status, | |
2187 | UDC_DMA_OUT_STS_RXBYTES); | |
2188 | if (!count && req->req.length | |
2189 | == UDC_DMA_MAXPACKET) { | |
2190 | /* | |
2191 | * on 64k packets the RXBYTES | |
2192 | * field is zero | |
2193 | */ | |
2194 | count = UDC_DMA_MAXPACKET; | |
2195 | } | |
2196 | } | |
2197 | VDBG(dev, "last desc rx bytes=%u\n", count); | |
2198 | } | |
2199 | ||
2200 | tmp = req->req.length - req->req.actual; | |
2201 | if (count > tmp) { | |
2202 | if ((tmp % ep->ep.maxpacket) != 0) { | |
2203 | DBG(dev, "%s: rx %db, space=%db\n", | |
2204 | ep->ep.name, count, tmp); | |
2205 | req->req.status = -EOVERFLOW; | |
2206 | } | |
2207 | count = tmp; | |
2208 | } | |
2209 | req->req.actual += count; | |
2210 | req->dma_going = 0; | |
2211 | /* complete request */ | |
2212 | complete_req(ep, req, 0); | |
2213 | ||
2214 | /* next request */ | |
2215 | if (!list_empty(&ep->queue) && !ep->halted) { | |
2216 | req = list_entry(ep->queue.next, | |
2217 | struct udc_request, | |
2218 | queue); | |
2219 | /* | |
2220 | * DMA may be already started by udc_queue() | |
2221 | * called by gadget drivers completion | |
2222 | * routine. This happens when queue | |
2223 | * holds one request only. | |
2224 | */ | |
2225 | if (req->dma_going == 0) { | |
2226 | /* next dma */ | |
2227 | if (prep_dma(ep, req, GFP_ATOMIC) != 0) | |
2228 | goto finished; | |
2229 | /* write desc pointer */ | |
2230 | writel(req->td_phys, | |
2231 | &ep->regs->desptr); | |
2232 | req->dma_going = 1; | |
2233 | /* enable DMA */ | |
2234 | udc_set_rde(dev); | |
2235 | } | |
2236 | } else { | |
2237 | /* | |
2238 | * implant BNA dummy descriptor to allow | |
2239 | * RXFIFO opening by RDE | |
2240 | */ | |
2241 | if (ep->bna_dummy_req) { | |
2242 | /* write desc pointer */ | |
2243 | writel(ep->bna_dummy_req->td_phys, | |
2244 | &ep->regs->desptr); | |
2245 | ep->bna_occurred = 0; | |
2246 | } | |
2247 | ||
2248 | /* | |
2249 | * schedule timer for setting RDE if queue | |
2250 | * remains empty to allow ep0 packets pass | |
2251 | * through | |
2252 | */ | |
2253 | if (set_rde != 0 | |
2254 | && !timer_pending(&udc_timer)) { | |
2255 | udc_timer.expires = | |
2256 | jiffies | |
2257 | + HZ*UDC_RDE_TIMER_SECONDS; | |
2258 | set_rde = 1; | |
170b778f | 2259 | if (!stop_timer) |
55d402d8 | 2260 | add_timer(&udc_timer); |
55d402d8 TD |
2261 | } |
2262 | if (ep->num != UDC_EP0OUT_IX) | |
2263 | dev->data_ep_queued = 0; | |
2264 | } | |
2265 | ||
2266 | } else { | |
2267 | /* | |
2268 | * RX DMA must be reenabled for each desc in PPBDU mode | |
2269 | * and must be enabled for PPBNDU mode in case of BNA | |
2270 | */ | |
2271 | udc_set_rde(dev); | |
2272 | } | |
2273 | ||
2274 | } else if (ep->cancel_transfer) { | |
2275 | ret_val = IRQ_HANDLED; | |
2276 | ep->cancel_transfer = 0; | |
2277 | } | |
2278 | ||
2279 | /* check pending CNAKS */ | |
2280 | if (cnak_pending) { | |
2281 | /* CNAk processing when rxfifo empty only */ | |
170b778f | 2282 | if (readl(&dev->regs->sts) & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) |
55d402d8 | 2283 | udc_process_cnak_queue(dev); |
55d402d8 TD |
2284 | } |
2285 | ||
2286 | /* clear OUT bits in ep status */ | |
2287 | writel(UDC_EPSTS_OUT_CLEAR, &ep->regs->sts); | |
2288 | finished: | |
2289 | return ret_val; | |
2290 | } | |
2291 | ||
2292 | /* Interrupt handler for data IN traffic */ | |
2293 | static irqreturn_t udc_data_in_isr(struct udc *dev, int ep_ix) | |
2294 | { | |
2295 | irqreturn_t ret_val = IRQ_NONE; | |
2296 | u32 tmp; | |
2297 | u32 epsts; | |
2298 | struct udc_ep *ep; | |
2299 | struct udc_request *req; | |
2300 | struct udc_data_dma *td; | |
2301 | unsigned dma_done; | |
2302 | unsigned len; | |
2303 | ||
2304 | ep = &dev->ep[ep_ix]; | |
2305 | ||
2306 | epsts = readl(&ep->regs->sts); | |
2307 | if (use_dma) { | |
2308 | /* BNA ? */ | |
2309 | if (epsts & AMD_BIT(UDC_EPSTS_BNA)) { | |
2310 | dev_err(&dev->pdev->dev, | |
5647a149 | 2311 | "BNA ep%din occurred - DESPTR = %08lx\n", |
55d402d8 TD |
2312 | ep->num, |
2313 | (unsigned long) readl(&ep->regs->desptr)); | |
2314 | ||
2315 | /* clear BNA */ | |
2316 | writel(epsts, &ep->regs->sts); | |
2317 | ret_val = IRQ_HANDLED; | |
2318 | goto finished; | |
2319 | } | |
2320 | } | |
2321 | /* HE event ? */ | |
2322 | if (epsts & AMD_BIT(UDC_EPSTS_HE)) { | |
2323 | dev_err(&dev->pdev->dev, | |
5647a149 | 2324 | "HE ep%dn occurred - DESPTR = %08lx\n", |
55d402d8 TD |
2325 | ep->num, (unsigned long) readl(&ep->regs->desptr)); |
2326 | ||
2327 | /* clear HE */ | |
2328 | writel(epsts | AMD_BIT(UDC_EPSTS_HE), &ep->regs->sts); | |
2329 | ret_val = IRQ_HANDLED; | |
2330 | goto finished; | |
2331 | } | |
2332 | ||
2333 | /* DMA completion */ | |
2334 | if (epsts & AMD_BIT(UDC_EPSTS_TDC)) { | |
2335 | VDBG(dev, "TDC set- completion\n"); | |
2336 | ret_val = IRQ_HANDLED; | |
2337 | if (!ep->cancel_transfer && !list_empty(&ep->queue)) { | |
2338 | req = list_entry(ep->queue.next, | |
2339 | struct udc_request, queue); | |
058e698b | 2340 | /* |
25985edc | 2341 | * length bytes transferred |
058e698b JL |
2342 | * check dma done of last desc. in PPBDU mode |
2343 | */ | |
2344 | if (use_dma_ppb_du) { | |
2345 | td = udc_get_last_dma_desc(req); | |
2346 | if (td) { | |
2347 | dma_done = | |
2348 | AMD_GETBITS(td->status, | |
2349 | UDC_DMA_IN_STS_BS); | |
2350 | /* don't care DMA done */ | |
55d402d8 TD |
2351 | req->req.actual = req->req.length; |
2352 | } | |
058e698b JL |
2353 | } else { |
2354 | /* assume all bytes transferred */ | |
2355 | req->req.actual = req->req.length; | |
2356 | } | |
55d402d8 | 2357 | |
058e698b JL |
2358 | if (req->req.actual == req->req.length) { |
2359 | /* complete req */ | |
2360 | complete_req(ep, req, 0); | |
2361 | req->dma_going = 0; | |
2362 | /* further request available ? */ | |
2363 | if (list_empty(&ep->queue)) { | |
2364 | /* disable interrupt */ | |
2365 | tmp = readl(&dev->regs->ep_irqmsk); | |
2366 | tmp |= AMD_BIT(ep->num); | |
2367 | writel(tmp, &dev->regs->ep_irqmsk); | |
55d402d8 TD |
2368 | } |
2369 | } | |
2370 | } | |
2371 | ep->cancel_transfer = 0; | |
2372 | ||
2373 | } | |
2374 | /* | |
2375 | * status reg has IN bit set and TDC not set (if TDC was handled, | |
2376 | * IN must not be handled (UDC defect) ? | |
2377 | */ | |
2378 | if ((epsts & AMD_BIT(UDC_EPSTS_IN)) | |
2379 | && !(epsts & AMD_BIT(UDC_EPSTS_TDC))) { | |
2380 | ret_val = IRQ_HANDLED; | |
2381 | if (!list_empty(&ep->queue)) { | |
2382 | /* next request */ | |
2383 | req = list_entry(ep->queue.next, | |
2384 | struct udc_request, queue); | |
2385 | /* FIFO mode */ | |
2386 | if (!use_dma) { | |
2387 | /* write fifo */ | |
2388 | udc_txfifo_write(ep, &req->req); | |
2389 | len = req->req.length - req->req.actual; | |
1435db48 CR |
2390 | if (len > ep->ep.maxpacket) |
2391 | len = ep->ep.maxpacket; | |
2392 | req->req.actual += len; | |
55d402d8 TD |
2393 | if (req->req.actual == req->req.length |
2394 | || (len != ep->ep.maxpacket)) { | |
2395 | /* complete req */ | |
2396 | complete_req(ep, req, 0); | |
2397 | } | |
2398 | /* DMA */ | |
2399 | } else if (req && !req->dma_going) { | |
2400 | VDBG(dev, "IN DMA : req=%p req->td_data=%p\n", | |
2401 | req, req->td_data); | |
2402 | if (req->td_data) { | |
2403 | ||
2404 | req->dma_going = 1; | |
2405 | ||
2406 | /* | |
2407 | * unset L bit of first desc. | |
2408 | * for chain | |
2409 | */ | |
2410 | if (use_dma_ppb && req->req.length > | |
2411 | ep->ep.maxpacket) { | |
2412 | req->td_data->status &= | |
2413 | AMD_CLEAR_BIT( | |
2414 | UDC_DMA_IN_STS_L); | |
2415 | } | |
2416 | ||
2417 | /* write desc pointer */ | |
2418 | writel(req->td_phys, &ep->regs->desptr); | |
2419 | ||
2420 | /* set HOST READY */ | |
2421 | req->td_data->status = | |
2422 | AMD_ADDBITS( | |
2423 | req->td_data->status, | |
2424 | UDC_DMA_IN_STS_BS_HOST_READY, | |
2425 | UDC_DMA_IN_STS_BS); | |
2426 | ||
2427 | /* set poll demand bit */ | |
2428 | tmp = readl(&ep->regs->ctl); | |
2429 | tmp |= AMD_BIT(UDC_EPCTL_P); | |
2430 | writel(tmp, &ep->regs->ctl); | |
2431 | } | |
2432 | } | |
2433 | ||
c5deb832 TD |
2434 | } else if (!use_dma && ep->in) { |
2435 | /* disable interrupt */ | |
2436 | tmp = readl( | |
2437 | &dev->regs->ep_irqmsk); | |
2438 | tmp |= AMD_BIT(ep->num); | |
2439 | writel(tmp, | |
2440 | &dev->regs->ep_irqmsk); | |
55d402d8 TD |
2441 | } |
2442 | } | |
2443 | /* clear status bits */ | |
2444 | writel(epsts, &ep->regs->sts); | |
2445 | ||
2446 | finished: | |
2447 | return ret_val; | |
2448 | ||
2449 | } | |
2450 | ||
2451 | /* Interrupt handler for Control OUT traffic */ | |
2452 | static irqreturn_t udc_control_out_isr(struct udc *dev) | |
2453 | __releases(dev->lock) | |
2454 | __acquires(dev->lock) | |
2455 | { | |
2456 | irqreturn_t ret_val = IRQ_NONE; | |
2457 | u32 tmp; | |
2458 | int setup_supported; | |
2459 | u32 count; | |
2460 | int set = 0; | |
2461 | struct udc_ep *ep; | |
2462 | struct udc_ep *ep_tmp; | |
2463 | ||
2464 | ep = &dev->ep[UDC_EP0OUT_IX]; | |
2465 | ||
2466 | /* clear irq */ | |
2467 | writel(AMD_BIT(UDC_EPINT_OUT_EP0), &dev->regs->ep_irqsts); | |
2468 | ||
2469 | tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2470 | /* check BNA and clear if set */ | |
2471 | if (tmp & AMD_BIT(UDC_EPSTS_BNA)) { | |
2472 | VDBG(dev, "ep0: BNA set\n"); | |
2473 | writel(AMD_BIT(UDC_EPSTS_BNA), | |
2474 | &dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2475 | ep->bna_occurred = 1; | |
2476 | ret_val = IRQ_HANDLED; | |
2477 | goto finished; | |
2478 | } | |
2479 | ||
2480 | /* type of data: SETUP or DATA 0 bytes */ | |
2481 | tmp = AMD_GETBITS(tmp, UDC_EPSTS_OUT); | |
2482 | VDBG(dev, "data_typ = %x\n", tmp); | |
2483 | ||
2484 | /* setup data */ | |
2485 | if (tmp == UDC_EPSTS_OUT_SETUP) { | |
2486 | ret_val = IRQ_HANDLED; | |
2487 | ||
2488 | ep->dev->stall_ep0in = 0; | |
2489 | dev->waiting_zlp_ack_ep0in = 0; | |
2490 | ||
2491 | /* set NAK for EP0_IN */ | |
2492 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2493 | tmp |= AMD_BIT(UDC_EPCTL_SNAK); | |
2494 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2495 | dev->ep[UDC_EP0IN_IX].naking = 1; | |
2496 | /* get setup data */ | |
2497 | if (use_dma) { | |
2498 | ||
2499 | /* clear OUT bits in ep status */ | |
2500 | writel(UDC_EPSTS_OUT_CLEAR, | |
2501 | &dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2502 | ||
2503 | setup_data.data[0] = | |
2504 | dev->ep[UDC_EP0OUT_IX].td_stp->data12; | |
2505 | setup_data.data[1] = | |
2506 | dev->ep[UDC_EP0OUT_IX].td_stp->data34; | |
2507 | /* set HOST READY */ | |
2508 | dev->ep[UDC_EP0OUT_IX].td_stp->status = | |
2509 | UDC_DMA_STP_STS_BS_HOST_READY; | |
2510 | } else { | |
2511 | /* read fifo */ | |
2512 | udc_rxfifo_read_dwords(dev, setup_data.data, 2); | |
2513 | } | |
2514 | ||
2515 | /* determine direction of control data */ | |
2516 | if ((setup_data.request.bRequestType & USB_DIR_IN) != 0) { | |
2517 | dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IX].ep; | |
2518 | /* enable RDE */ | |
2519 | udc_ep0_set_rde(dev); | |
2520 | set = 0; | |
2521 | } else { | |
2522 | dev->gadget.ep0 = &dev->ep[UDC_EP0OUT_IX].ep; | |
2523 | /* | |
2524 | * implant BNA dummy descriptor to allow RXFIFO opening | |
2525 | * by RDE | |
2526 | */ | |
2527 | if (ep->bna_dummy_req) { | |
2528 | /* write desc pointer */ | |
2529 | writel(ep->bna_dummy_req->td_phys, | |
2530 | &dev->ep[UDC_EP0OUT_IX].regs->desptr); | |
2531 | ep->bna_occurred = 0; | |
2532 | } | |
2533 | ||
2534 | set = 1; | |
2535 | dev->ep[UDC_EP0OUT_IX].naking = 1; | |
2536 | /* | |
2537 | * setup timer for enabling RDE (to not enable | |
2538 | * RXFIFO DMA for data to early) | |
2539 | */ | |
2540 | set_rde = 1; | |
2541 | if (!timer_pending(&udc_timer)) { | |
2542 | udc_timer.expires = jiffies + | |
2543 | HZ/UDC_RDE_TIMER_DIV; | |
170b778f | 2544 | if (!stop_timer) |
55d402d8 | 2545 | add_timer(&udc_timer); |
55d402d8 TD |
2546 | } |
2547 | } | |
2548 | ||
2549 | /* | |
2550 | * mass storage reset must be processed here because | |
2551 | * next packet may be a CLEAR_FEATURE HALT which would not | |
2552 | * clear the stall bit when no STALL handshake was received | |
2553 | * before (autostall can cause this) | |
2554 | */ | |
2555 | if (setup_data.data[0] == UDC_MSCRES_DWORD0 | |
2556 | && setup_data.data[1] == UDC_MSCRES_DWORD1) { | |
2557 | DBG(dev, "MSC Reset\n"); | |
2558 | /* | |
2559 | * clear stall bits | |
2560 | * only one IN and OUT endpoints are handled | |
2561 | */ | |
2562 | ep_tmp = &udc->ep[UDC_EPIN_IX]; | |
2563 | udc_set_halt(&ep_tmp->ep, 0); | |
2564 | ep_tmp = &udc->ep[UDC_EPOUT_IX]; | |
2565 | udc_set_halt(&ep_tmp->ep, 0); | |
2566 | } | |
2567 | ||
2568 | /* call gadget with setup data received */ | |
2569 | spin_unlock(&dev->lock); | |
2570 | setup_supported = dev->driver->setup(&dev->gadget, | |
2571 | &setup_data.request); | |
2572 | spin_lock(&dev->lock); | |
2573 | ||
2574 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2575 | /* ep0 in returns data (not zlp) on IN phase */ | |
2576 | if (setup_supported >= 0 && setup_supported < | |
2577 | UDC_EP0IN_MAXPACKET) { | |
2578 | /* clear NAK by writing CNAK in EP0_IN */ | |
2579 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
2580 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2581 | dev->ep[UDC_EP0IN_IX].naking = 0; | |
2582 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], UDC_EP0IN_IX); | |
2583 | ||
2584 | /* if unsupported request then stall */ | |
2585 | } else if (setup_supported < 0) { | |
2586 | tmp |= AMD_BIT(UDC_EPCTL_S); | |
2587 | writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2588 | } else | |
2589 | dev->waiting_zlp_ack_ep0in = 1; | |
2590 | ||
2591 | ||
2592 | /* clear NAK by writing CNAK in EP0_OUT */ | |
2593 | if (!set) { | |
2594 | tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
2595 | tmp |= AMD_BIT(UDC_EPCTL_CNAK); | |
2596 | writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->ctl); | |
2597 | dev->ep[UDC_EP0OUT_IX].naking = 0; | |
2598 | UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], UDC_EP0OUT_IX); | |
2599 | } | |
2600 | ||
2601 | if (!use_dma) { | |
2602 | /* clear OUT bits in ep status */ | |
2603 | writel(UDC_EPSTS_OUT_CLEAR, | |
2604 | &dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2605 | } | |
2606 | ||
2607 | /* data packet 0 bytes */ | |
2608 | } else if (tmp == UDC_EPSTS_OUT_DATA) { | |
2609 | /* clear OUT bits in ep status */ | |
2610 | writel(UDC_EPSTS_OUT_CLEAR, &dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2611 | ||
2612 | /* get setup data: only 0 packet */ | |
2613 | if (use_dma) { | |
2614 | /* no req if 0 packet, just reactivate */ | |
2615 | if (list_empty(&dev->ep[UDC_EP0OUT_IX].queue)) { | |
2616 | VDBG(dev, "ZLP\n"); | |
2617 | ||
2618 | /* set HOST READY */ | |
2619 | dev->ep[UDC_EP0OUT_IX].td->status = | |
2620 | AMD_ADDBITS( | |
2621 | dev->ep[UDC_EP0OUT_IX].td->status, | |
2622 | UDC_DMA_OUT_STS_BS_HOST_READY, | |
2623 | UDC_DMA_OUT_STS_BS); | |
2624 | /* enable RDE */ | |
2625 | udc_ep0_set_rde(dev); | |
2626 | ret_val = IRQ_HANDLED; | |
2627 | ||
2628 | } else { | |
2629 | /* control write */ | |
2630 | ret_val |= udc_data_out_isr(dev, UDC_EP0OUT_IX); | |
2631 | /* re-program desc. pointer for possible ZLPs */ | |
2632 | writel(dev->ep[UDC_EP0OUT_IX].td_phys, | |
2633 | &dev->ep[UDC_EP0OUT_IX].regs->desptr); | |
2634 | /* enable RDE */ | |
2635 | udc_ep0_set_rde(dev); | |
2636 | } | |
2637 | } else { | |
2638 | ||
2639 | /* received number bytes */ | |
2640 | count = readl(&dev->ep[UDC_EP0OUT_IX].regs->sts); | |
2641 | count = AMD_GETBITS(count, UDC_EPSTS_RX_PKT_SIZE); | |
2642 | /* out data for fifo mode not working */ | |
2643 | count = 0; | |
2644 | ||
2645 | /* 0 packet or real data ? */ | |
2646 | if (count != 0) { | |
2647 | ret_val |= udc_data_out_isr(dev, UDC_EP0OUT_IX); | |
2648 | } else { | |
2649 | /* dummy read confirm */ | |
2650 | readl(&dev->ep[UDC_EP0OUT_IX].regs->confirm); | |
2651 | ret_val = IRQ_HANDLED; | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | ||
2656 | /* check pending CNAKS */ | |
2657 | if (cnak_pending) { | |
2658 | /* CNAk processing when rxfifo empty only */ | |
170b778f | 2659 | if (readl(&dev->regs->sts) & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) |
55d402d8 | 2660 | udc_process_cnak_queue(dev); |
55d402d8 TD |
2661 | } |
2662 | ||
2663 | finished: | |
2664 | return ret_val; | |
2665 | } | |
2666 | ||
2667 | /* Interrupt handler for Control IN traffic */ | |
2668 | static irqreturn_t udc_control_in_isr(struct udc *dev) | |
2669 | { | |
2670 | irqreturn_t ret_val = IRQ_NONE; | |
2671 | u32 tmp; | |
2672 | struct udc_ep *ep; | |
2673 | struct udc_request *req; | |
2674 | unsigned len; | |
2675 | ||
2676 | ep = &dev->ep[UDC_EP0IN_IX]; | |
2677 | ||
2678 | /* clear irq */ | |
2679 | writel(AMD_BIT(UDC_EPINT_IN_EP0), &dev->regs->ep_irqsts); | |
2680 | ||
2681 | tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->sts); | |
2682 | /* DMA completion */ | |
2683 | if (tmp & AMD_BIT(UDC_EPSTS_TDC)) { | |
5647a149 | 2684 | VDBG(dev, "isr: TDC clear\n"); |
55d402d8 TD |
2685 | ret_val = IRQ_HANDLED; |
2686 | ||
2687 | /* clear TDC bit */ | |
2688 | writel(AMD_BIT(UDC_EPSTS_TDC), | |
2689 | &dev->ep[UDC_EP0IN_IX].regs->sts); | |
2690 | ||
2691 | /* status reg has IN bit set ? */ | |
2692 | } else if (tmp & AMD_BIT(UDC_EPSTS_IN)) { | |
2693 | ret_val = IRQ_HANDLED; | |
2694 | ||
2695 | if (ep->dma) { | |
2696 | /* clear IN bit */ | |
2697 | writel(AMD_BIT(UDC_EPSTS_IN), | |
2698 | &dev->ep[UDC_EP0IN_IX].regs->sts); | |
2699 | } | |
2700 | if (dev->stall_ep0in) { | |
2701 | DBG(dev, "stall ep0in\n"); | |
2702 | /* halt ep0in */ | |
2703 | tmp = readl(&ep->regs->ctl); | |
2704 | tmp |= AMD_BIT(UDC_EPCTL_S); | |
2705 | writel(tmp, &ep->regs->ctl); | |
2706 | } else { | |
2707 | if (!list_empty(&ep->queue)) { | |
2708 | /* next request */ | |
2709 | req = list_entry(ep->queue.next, | |
2710 | struct udc_request, queue); | |
2711 | ||
2712 | if (ep->dma) { | |
2713 | /* write desc pointer */ | |
2714 | writel(req->td_phys, &ep->regs->desptr); | |
2715 | /* set HOST READY */ | |
2716 | req->td_data->status = | |
2717 | AMD_ADDBITS( | |
2718 | req->td_data->status, | |
2719 | UDC_DMA_STP_STS_BS_HOST_READY, | |
2720 | UDC_DMA_STP_STS_BS); | |
2721 | ||
2722 | /* set poll demand bit */ | |
2723 | tmp = | |
2724 | readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2725 | tmp |= AMD_BIT(UDC_EPCTL_P); | |
2726 | writel(tmp, | |
2727 | &dev->ep[UDC_EP0IN_IX].regs->ctl); | |
2728 | ||
2729 | /* all bytes will be transferred */ | |
2730 | req->req.actual = req->req.length; | |
2731 | ||
2732 | /* complete req */ | |
2733 | complete_req(ep, req, 0); | |
2734 | ||
2735 | } else { | |
2736 | /* write fifo */ | |
2737 | udc_txfifo_write(ep, &req->req); | |
2738 | ||
25985edc | 2739 | /* lengh bytes transferred */ |
55d402d8 TD |
2740 | len = req->req.length - req->req.actual; |
2741 | if (len > ep->ep.maxpacket) | |
2742 | len = ep->ep.maxpacket; | |
2743 | ||
2744 | req->req.actual += len; | |
2745 | if (req->req.actual == req->req.length | |
2746 | || (len != ep->ep.maxpacket)) { | |
2747 | /* complete req */ | |
2748 | complete_req(ep, req, 0); | |
2749 | } | |
2750 | } | |
2751 | ||
2752 | } | |
2753 | } | |
2754 | ep->halted = 0; | |
2755 | dev->stall_ep0in = 0; | |
2756 | if (!ep->dma) { | |
2757 | /* clear IN bit */ | |
2758 | writel(AMD_BIT(UDC_EPSTS_IN), | |
2759 | &dev->ep[UDC_EP0IN_IX].regs->sts); | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | return ret_val; | |
2764 | } | |
2765 | ||
2766 | ||
2767 | /* Interrupt handler for global device events */ | |
2768 | static irqreturn_t udc_dev_isr(struct udc *dev, u32 dev_irq) | |
2769 | __releases(dev->lock) | |
2770 | __acquires(dev->lock) | |
2771 | { | |
2772 | irqreturn_t ret_val = IRQ_NONE; | |
2773 | u32 tmp; | |
2774 | u32 cfg; | |
2775 | struct udc_ep *ep; | |
2776 | u16 i; | |
2777 | u8 udc_csr_epix; | |
2778 | ||
2779 | /* SET_CONFIG irq ? */ | |
2780 | if (dev_irq & AMD_BIT(UDC_DEVINT_SC)) { | |
2781 | ret_val = IRQ_HANDLED; | |
2782 | ||
2783 | /* read config value */ | |
2784 | tmp = readl(&dev->regs->sts); | |
2785 | cfg = AMD_GETBITS(tmp, UDC_DEVSTS_CFG); | |
2786 | DBG(dev, "SET_CONFIG interrupt: config=%d\n", cfg); | |
2787 | dev->cur_config = cfg; | |
2788 | dev->set_cfg_not_acked = 1; | |
2789 | ||
2790 | /* make usb request for gadget driver */ | |
2791 | memset(&setup_data, 0 , sizeof(union udc_setup_data)); | |
2792 | setup_data.request.bRequest = USB_REQ_SET_CONFIGURATION; | |
fd05e720 | 2793 | setup_data.request.wValue = cpu_to_le16(dev->cur_config); |
55d402d8 TD |
2794 | |
2795 | /* programm the NE registers */ | |
2796 | for (i = 0; i < UDC_EP_NUM; i++) { | |
2797 | ep = &dev->ep[i]; | |
2798 | if (ep->in) { | |
2799 | ||
2800 | /* ep ix in UDC CSR register space */ | |
2801 | udc_csr_epix = ep->num; | |
2802 | ||
2803 | ||
2804 | /* OUT ep */ | |
2805 | } else { | |
2806 | /* ep ix in UDC CSR register space */ | |
2807 | udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; | |
2808 | } | |
2809 | ||
2810 | tmp = readl(&dev->csr->ne[udc_csr_epix]); | |
2811 | /* ep cfg */ | |
2812 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_config, | |
2813 | UDC_CSR_NE_CFG); | |
2814 | /* write reg */ | |
2815 | writel(tmp, &dev->csr->ne[udc_csr_epix]); | |
2816 | ||
2817 | /* clear stall bits */ | |
2818 | ep->halted = 0; | |
2819 | tmp = readl(&ep->regs->ctl); | |
2820 | tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); | |
2821 | writel(tmp, &ep->regs->ctl); | |
2822 | } | |
2823 | /* call gadget zero with setup data received */ | |
2824 | spin_unlock(&dev->lock); | |
2825 | tmp = dev->driver->setup(&dev->gadget, &setup_data.request); | |
2826 | spin_lock(&dev->lock); | |
2827 | ||
2828 | } /* SET_INTERFACE ? */ | |
2829 | if (dev_irq & AMD_BIT(UDC_DEVINT_SI)) { | |
2830 | ret_val = IRQ_HANDLED; | |
2831 | ||
2832 | dev->set_cfg_not_acked = 1; | |
2833 | /* read interface and alt setting values */ | |
2834 | tmp = readl(&dev->regs->sts); | |
2835 | dev->cur_alt = AMD_GETBITS(tmp, UDC_DEVSTS_ALT); | |
2836 | dev->cur_intf = AMD_GETBITS(tmp, UDC_DEVSTS_INTF); | |
2837 | ||
2838 | /* make usb request for gadget driver */ | |
2839 | memset(&setup_data, 0 , sizeof(union udc_setup_data)); | |
2840 | setup_data.request.bRequest = USB_REQ_SET_INTERFACE; | |
2841 | setup_data.request.bRequestType = USB_RECIP_INTERFACE; | |
fd05e720 AV |
2842 | setup_data.request.wValue = cpu_to_le16(dev->cur_alt); |
2843 | setup_data.request.wIndex = cpu_to_le16(dev->cur_intf); | |
55d402d8 TD |
2844 | |
2845 | DBG(dev, "SET_INTERFACE interrupt: alt=%d intf=%d\n", | |
2846 | dev->cur_alt, dev->cur_intf); | |
2847 | ||
2848 | /* programm the NE registers */ | |
2849 | for (i = 0; i < UDC_EP_NUM; i++) { | |
2850 | ep = &dev->ep[i]; | |
2851 | if (ep->in) { | |
2852 | ||
2853 | /* ep ix in UDC CSR register space */ | |
2854 | udc_csr_epix = ep->num; | |
2855 | ||
2856 | ||
2857 | /* OUT ep */ | |
2858 | } else { | |
2859 | /* ep ix in UDC CSR register space */ | |
2860 | udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; | |
2861 | } | |
2862 | ||
2863 | /* UDC CSR reg */ | |
2864 | /* set ep values */ | |
2865 | tmp = readl(&dev->csr->ne[udc_csr_epix]); | |
2866 | /* ep interface */ | |
2867 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_intf, | |
2868 | UDC_CSR_NE_INTF); | |
2869 | /* tmp = AMD_ADDBITS(tmp, 2, UDC_CSR_NE_INTF); */ | |
2870 | /* ep alt */ | |
2871 | tmp = AMD_ADDBITS(tmp, ep->dev->cur_alt, | |
2872 | UDC_CSR_NE_ALT); | |
2873 | /* write reg */ | |
2874 | writel(tmp, &dev->csr->ne[udc_csr_epix]); | |
2875 | ||
2876 | /* clear stall bits */ | |
2877 | ep->halted = 0; | |
2878 | tmp = readl(&ep->regs->ctl); | |
2879 | tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); | |
2880 | writel(tmp, &ep->regs->ctl); | |
2881 | } | |
2882 | ||
2883 | /* call gadget zero with setup data received */ | |
2884 | spin_unlock(&dev->lock); | |
2885 | tmp = dev->driver->setup(&dev->gadget, &setup_data.request); | |
2886 | spin_lock(&dev->lock); | |
2887 | ||
2888 | } /* USB reset */ | |
2889 | if (dev_irq & AMD_BIT(UDC_DEVINT_UR)) { | |
2890 | DBG(dev, "USB Reset interrupt\n"); | |
2891 | ret_val = IRQ_HANDLED; | |
2892 | ||
2893 | /* allow soft reset when suspend occurs */ | |
2894 | soft_reset_occured = 0; | |
2895 | ||
2896 | dev->waiting_zlp_ack_ep0in = 0; | |
2897 | dev->set_cfg_not_acked = 0; | |
2898 | ||
2899 | /* mask not needed interrupts */ | |
2900 | udc_mask_unused_interrupts(dev); | |
2901 | ||
2902 | /* call gadget to resume and reset configs etc. */ | |
2903 | spin_unlock(&dev->lock); | |
2904 | if (dev->sys_suspended && dev->driver->resume) { | |
2905 | dev->driver->resume(&dev->gadget); | |
2906 | dev->sys_suspended = 0; | |
2907 | } | |
2908 | dev->driver->disconnect(&dev->gadget); | |
2909 | spin_lock(&dev->lock); | |
2910 | ||
2911 | /* disable ep0 to empty req queue */ | |
2912 | empty_req_queue(&dev->ep[UDC_EP0IN_IX]); | |
2913 | ep_init(dev->regs, &dev->ep[UDC_EP0IN_IX]); | |
2914 | ||
2915 | /* soft reset when rxfifo not empty */ | |
2916 | tmp = readl(&dev->regs->sts); | |
2917 | if (!(tmp & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) | |
2918 | && !soft_reset_after_usbreset_occured) { | |
2919 | udc_soft_reset(dev); | |
2920 | soft_reset_after_usbreset_occured++; | |
2921 | } | |
2922 | ||
2923 | /* | |
2924 | * DMA reset to kill potential old DMA hw hang, | |
2925 | * POLL bit is already reset by ep_init() through | |
2926 | * disconnect() | |
2927 | */ | |
2928 | DBG(dev, "DMA machine reset\n"); | |
2929 | tmp = readl(&dev->regs->cfg); | |
2930 | writel(tmp | AMD_BIT(UDC_DEVCFG_DMARST), &dev->regs->cfg); | |
2931 | writel(tmp, &dev->regs->cfg); | |
2932 | ||
2933 | /* put into initial config */ | |
2934 | udc_basic_init(dev); | |
2935 | ||
2936 | /* enable device setup interrupts */ | |
2937 | udc_enable_dev_setup_interrupts(dev); | |
2938 | ||
2939 | /* enable suspend interrupt */ | |
2940 | tmp = readl(&dev->regs->irqmsk); | |
2941 | tmp &= AMD_UNMASK_BIT(UDC_DEVINT_US); | |
2942 | writel(tmp, &dev->regs->irqmsk); | |
2943 | ||
2944 | } /* USB suspend */ | |
2945 | if (dev_irq & AMD_BIT(UDC_DEVINT_US)) { | |
2946 | DBG(dev, "USB Suspend interrupt\n"); | |
2947 | ret_val = IRQ_HANDLED; | |
2948 | if (dev->driver->suspend) { | |
2949 | spin_unlock(&dev->lock); | |
2950 | dev->sys_suspended = 1; | |
2951 | dev->driver->suspend(&dev->gadget); | |
2952 | spin_lock(&dev->lock); | |
2953 | } | |
2954 | } /* new speed ? */ | |
2955 | if (dev_irq & AMD_BIT(UDC_DEVINT_ENUM)) { | |
2956 | DBG(dev, "ENUM interrupt\n"); | |
2957 | ret_val = IRQ_HANDLED; | |
2958 | soft_reset_after_usbreset_occured = 0; | |
2959 | ||
2960 | /* disable ep0 to empty req queue */ | |
2961 | empty_req_queue(&dev->ep[UDC_EP0IN_IX]); | |
2962 | ep_init(dev->regs, &dev->ep[UDC_EP0IN_IX]); | |
2963 | ||
2964 | /* link up all endpoints */ | |
2965 | udc_setup_endpoints(dev); | |
e538dfda MN |
2966 | dev_info(&dev->pdev->dev, "Connect: %s\n", |
2967 | usb_speed_string(dev->gadget.speed)); | |
55d402d8 TD |
2968 | |
2969 | /* init ep 0 */ | |
2970 | activate_control_endpoints(dev); | |
2971 | ||
2972 | /* enable ep0 interrupts */ | |
2973 | udc_enable_ep0_interrupts(dev); | |
2974 | } | |
2975 | /* session valid change interrupt */ | |
2976 | if (dev_irq & AMD_BIT(UDC_DEVINT_SVC)) { | |
2977 | DBG(dev, "USB SVC interrupt\n"); | |
2978 | ret_val = IRQ_HANDLED; | |
2979 | ||
2980 | /* check that session is not valid to detect disconnect */ | |
2981 | tmp = readl(&dev->regs->sts); | |
2982 | if (!(tmp & AMD_BIT(UDC_DEVSTS_SESSVLD))) { | |
2983 | /* disable suspend interrupt */ | |
2984 | tmp = readl(&dev->regs->irqmsk); | |
2985 | tmp |= AMD_BIT(UDC_DEVINT_US); | |
2986 | writel(tmp, &dev->regs->irqmsk); | |
2987 | DBG(dev, "USB Disconnect (session valid low)\n"); | |
2988 | /* cleanup on disconnect */ | |
2989 | usb_disconnect(udc); | |
2990 | } | |
2991 | ||
2992 | } | |
2993 | ||
2994 | return ret_val; | |
2995 | } | |
2996 | ||
2997 | /* Interrupt Service Routine, see Linux Kernel Doc for parameters */ | |
2998 | static irqreturn_t udc_irq(int irq, void *pdev) | |
2999 | { | |
3000 | struct udc *dev = pdev; | |
3001 | u32 reg; | |
3002 | u16 i; | |
3003 | u32 ep_irq; | |
3004 | irqreturn_t ret_val = IRQ_NONE; | |
3005 | ||
3006 | spin_lock(&dev->lock); | |
3007 | ||
3008 | /* check for ep irq */ | |
3009 | reg = readl(&dev->regs->ep_irqsts); | |
3010 | if (reg) { | |
3011 | if (reg & AMD_BIT(UDC_EPINT_OUT_EP0)) | |
3012 | ret_val |= udc_control_out_isr(dev); | |
3013 | if (reg & AMD_BIT(UDC_EPINT_IN_EP0)) | |
3014 | ret_val |= udc_control_in_isr(dev); | |
3015 | ||
3016 | /* | |
3017 | * data endpoint | |
3018 | * iterate ep's | |
3019 | */ | |
3020 | for (i = 1; i < UDC_EP_NUM; i++) { | |
3021 | ep_irq = 1 << i; | |
3022 | if (!(reg & ep_irq) || i == UDC_EPINT_OUT_EP0) | |
3023 | continue; | |
3024 | ||
3025 | /* clear irq status */ | |
3026 | writel(ep_irq, &dev->regs->ep_irqsts); | |
3027 | ||
3028 | /* irq for out ep ? */ | |
3029 | if (i > UDC_EPIN_NUM) | |
3030 | ret_val |= udc_data_out_isr(dev, i); | |
3031 | else | |
3032 | ret_val |= udc_data_in_isr(dev, i); | |
3033 | } | |
3034 | ||
3035 | } | |
3036 | ||
3037 | ||
3038 | /* check for dev irq */ | |
3039 | reg = readl(&dev->regs->irqsts); | |
3040 | if (reg) { | |
3041 | /* clear irq */ | |
3042 | writel(reg, &dev->regs->irqsts); | |
3043 | ret_val |= udc_dev_isr(dev, reg); | |
3044 | } | |
3045 | ||
3046 | ||
3047 | spin_unlock(&dev->lock); | |
3048 | return ret_val; | |
3049 | } | |
3050 | ||
3051 | /* Tears down device */ | |
3052 | static void gadget_release(struct device *pdev) | |
3053 | { | |
3054 | struct amd5536udc *dev = dev_get_drvdata(pdev); | |
3055 | kfree(dev); | |
3056 | } | |
3057 | ||
3058 | /* Cleanup on device remove */ | |
3059 | static void udc_remove(struct udc *dev) | |
3060 | { | |
3061 | /* remove timer */ | |
3062 | stop_timer++; | |
3063 | if (timer_pending(&udc_timer)) | |
3064 | wait_for_completion(&on_exit); | |
3065 | if (udc_timer.data) | |
3066 | del_timer_sync(&udc_timer); | |
3067 | /* remove pollstall timer */ | |
3068 | stop_pollstall_timer++; | |
3069 | if (timer_pending(&udc_pollstall_timer)) | |
3070 | wait_for_completion(&on_pollstall_exit); | |
3071 | if (udc_pollstall_timer.data) | |
3072 | del_timer_sync(&udc_pollstall_timer); | |
3073 | udc = NULL; | |
3074 | } | |
3075 | ||
3076 | /* Reset all pci context */ | |
3077 | static void udc_pci_remove(struct pci_dev *pdev) | |
3078 | { | |
3079 | struct udc *dev; | |
3080 | ||
3081 | dev = pci_get_drvdata(pdev); | |
3082 | ||
0f91349b | 3083 | usb_del_gadget_udc(&udc->gadget); |
55d402d8 TD |
3084 | /* gadget driver must not be registered */ |
3085 | BUG_ON(dev->driver != NULL); | |
3086 | ||
3087 | /* dma pool cleanup */ | |
3088 | if (dev->data_requests) | |
3089 | pci_pool_destroy(dev->data_requests); | |
3090 | ||
3091 | if (dev->stp_requests) { | |
3092 | /* cleanup DMA desc's for ep0in */ | |
3093 | pci_pool_free(dev->stp_requests, | |
3094 | dev->ep[UDC_EP0OUT_IX].td_stp, | |
3095 | dev->ep[UDC_EP0OUT_IX].td_stp_dma); | |
3096 | pci_pool_free(dev->stp_requests, | |
3097 | dev->ep[UDC_EP0OUT_IX].td, | |
3098 | dev->ep[UDC_EP0OUT_IX].td_phys); | |
3099 | ||
3100 | pci_pool_destroy(dev->stp_requests); | |
3101 | } | |
3102 | ||
3103 | /* reset controller */ | |
3104 | writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); | |
3105 | if (dev->irq_registered) | |
3106 | free_irq(pdev->irq, dev); | |
3107 | if (dev->regs) | |
3108 | iounmap(dev->regs); | |
3109 | if (dev->mem_region) | |
3110 | release_mem_region(pci_resource_start(pdev, 0), | |
3111 | pci_resource_len(pdev, 0)); | |
3112 | if (dev->active) | |
3113 | pci_disable_device(pdev); | |
3114 | ||
3115 | device_unregister(&dev->gadget.dev); | |
3116 | pci_set_drvdata(pdev, NULL); | |
3117 | ||
3118 | udc_remove(dev); | |
3119 | } | |
3120 | ||
3121 | /* create dma pools on init */ | |
3122 | static int init_dma_pools(struct udc *dev) | |
3123 | { | |
3124 | struct udc_stp_dma *td_stp; | |
3125 | struct udc_data_dma *td_data; | |
3126 | int retval; | |
3127 | ||
3128 | /* consistent DMA mode setting ? */ | |
3129 | if (use_dma_ppb) { | |
3130 | use_dma_bufferfill_mode = 0; | |
3131 | } else { | |
3132 | use_dma_ppb_du = 0; | |
3133 | use_dma_bufferfill_mode = 1; | |
3134 | } | |
3135 | ||
3136 | /* DMA setup */ | |
3137 | dev->data_requests = dma_pool_create("data_requests", NULL, | |
3138 | sizeof(struct udc_data_dma), 0, 0); | |
3139 | if (!dev->data_requests) { | |
3140 | DBG(dev, "can't get request data pool\n"); | |
3141 | retval = -ENOMEM; | |
3142 | goto finished; | |
3143 | } | |
3144 | ||
3145 | /* EP0 in dma regs = dev control regs */ | |
3146 | dev->ep[UDC_EP0IN_IX].dma = &dev->regs->ctl; | |
3147 | ||
3148 | /* dma desc for setup data */ | |
3149 | dev->stp_requests = dma_pool_create("setup requests", NULL, | |
3150 | sizeof(struct udc_stp_dma), 0, 0); | |
3151 | if (!dev->stp_requests) { | |
3152 | DBG(dev, "can't get stp request pool\n"); | |
3153 | retval = -ENOMEM; | |
3154 | goto finished; | |
3155 | } | |
3156 | /* setup */ | |
3157 | td_stp = dma_pool_alloc(dev->stp_requests, GFP_KERNEL, | |
3158 | &dev->ep[UDC_EP0OUT_IX].td_stp_dma); | |
3159 | if (td_stp == NULL) { | |
3160 | retval = -ENOMEM; | |
3161 | goto finished; | |
3162 | } | |
3163 | dev->ep[UDC_EP0OUT_IX].td_stp = td_stp; | |
3164 | ||
3165 | /* data: 0 packets !? */ | |
3166 | td_data = dma_pool_alloc(dev->stp_requests, GFP_KERNEL, | |
3167 | &dev->ep[UDC_EP0OUT_IX].td_phys); | |
3168 | if (td_data == NULL) { | |
3169 | retval = -ENOMEM; | |
3170 | goto finished; | |
3171 | } | |
3172 | dev->ep[UDC_EP0OUT_IX].td = td_data; | |
3173 | return 0; | |
3174 | ||
3175 | finished: | |
3176 | return retval; | |
3177 | } | |
3178 | ||
3179 | /* Called by pci bus driver to init pci context */ | |
3180 | static int udc_pci_probe( | |
3181 | struct pci_dev *pdev, | |
3182 | const struct pci_device_id *id | |
3183 | ) | |
3184 | { | |
3185 | struct udc *dev; | |
3186 | unsigned long resource; | |
3187 | unsigned long len; | |
3188 | int retval = 0; | |
3189 | ||
3190 | /* one udc only */ | |
3191 | if (udc) { | |
3192 | dev_dbg(&pdev->dev, "already probed\n"); | |
3193 | return -EBUSY; | |
3194 | } | |
3195 | ||
3196 | /* init */ | |
3197 | dev = kzalloc(sizeof(struct udc), GFP_KERNEL); | |
3198 | if (!dev) { | |
3199 | retval = -ENOMEM; | |
3200 | goto finished; | |
3201 | } | |
55d402d8 TD |
3202 | |
3203 | /* pci setup */ | |
3204 | if (pci_enable_device(pdev) < 0) { | |
73d79aab | 3205 | kfree(dev); |
af3d305c | 3206 | dev = NULL; |
55d402d8 TD |
3207 | retval = -ENODEV; |
3208 | goto finished; | |
3209 | } | |
3210 | dev->active = 1; | |
3211 | ||
3212 | /* PCI resource allocation */ | |
3213 | resource = pci_resource_start(pdev, 0); | |
3214 | len = pci_resource_len(pdev, 0); | |
3215 | ||
3216 | if (!request_mem_region(resource, len, name)) { | |
3217 | dev_dbg(&pdev->dev, "pci device used already\n"); | |
73d79aab | 3218 | kfree(dev); |
af3d305c | 3219 | dev = NULL; |
55d402d8 TD |
3220 | retval = -EBUSY; |
3221 | goto finished; | |
3222 | } | |
3223 | dev->mem_region = 1; | |
3224 | ||
3225 | dev->virt_addr = ioremap_nocache(resource, len); | |
3226 | if (dev->virt_addr == NULL) { | |
3227 | dev_dbg(&pdev->dev, "start address cannot be mapped\n"); | |
73d79aab | 3228 | kfree(dev); |
af3d305c | 3229 | dev = NULL; |
55d402d8 TD |
3230 | retval = -EFAULT; |
3231 | goto finished; | |
3232 | } | |
3233 | ||
3234 | if (!pdev->irq) { | |
3235 | dev_err(&dev->pdev->dev, "irq not set\n"); | |
73d79aab | 3236 | kfree(dev); |
af3d305c | 3237 | dev = NULL; |
55d402d8 TD |
3238 | retval = -ENODEV; |
3239 | goto finished; | |
3240 | } | |
3241 | ||
c5deb832 TD |
3242 | spin_lock_init(&dev->lock); |
3243 | /* udc csr registers base */ | |
3244 | dev->csr = dev->virt_addr + UDC_CSR_ADDR; | |
3245 | /* dev registers base */ | |
3246 | dev->regs = dev->virt_addr + UDC_DEVCFG_ADDR; | |
3247 | /* ep registers base */ | |
3248 | dev->ep_regs = dev->virt_addr + UDC_EPREGS_ADDR; | |
3249 | /* fifo's base */ | |
3250 | dev->rxfifo = (u32 __iomem *)(dev->virt_addr + UDC_RXFIFO_ADDR); | |
3251 | dev->txfifo = (u32 __iomem *)(dev->virt_addr + UDC_TXFIFO_ADDR); | |
3252 | ||
55d402d8 TD |
3253 | if (request_irq(pdev->irq, udc_irq, IRQF_SHARED, name, dev) != 0) { |
3254 | dev_dbg(&dev->pdev->dev, "request_irq(%d) fail\n", pdev->irq); | |
73d79aab | 3255 | kfree(dev); |
af3d305c | 3256 | dev = NULL; |
55d402d8 TD |
3257 | retval = -EBUSY; |
3258 | goto finished; | |
3259 | } | |
3260 | dev->irq_registered = 1; | |
3261 | ||
3262 | pci_set_drvdata(pdev, dev); | |
3263 | ||
1d3ee41e AK |
3264 | /* chip revision for Hs AMD5536 */ |
3265 | dev->chiprev = pdev->revision; | |
55d402d8 TD |
3266 | |
3267 | pci_set_master(pdev); | |
51745281 | 3268 | pci_try_set_mwi(pdev); |
55d402d8 | 3269 | |
55d402d8 TD |
3270 | /* init dma pools */ |
3271 | if (use_dma) { | |
3272 | retval = init_dma_pools(dev); | |
3273 | if (retval != 0) | |
3274 | goto finished; | |
3275 | } | |
3276 | ||
3277 | dev->phys_addr = resource; | |
3278 | dev->irq = pdev->irq; | |
3279 | dev->pdev = pdev; | |
3280 | dev->gadget.dev.parent = &pdev->dev; | |
3281 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; | |
3282 | ||
3283 | /* general probing */ | |
3284 | if (udc_probe(dev) == 0) | |
3285 | return 0; | |
3286 | ||
3287 | finished: | |
3288 | if (dev) | |
3289 | udc_pci_remove(pdev); | |
3290 | return retval; | |
3291 | } | |
3292 | ||
3293 | /* general probe */ | |
3294 | static int udc_probe(struct udc *dev) | |
3295 | { | |
3296 | char tmp[128]; | |
3297 | u32 reg; | |
3298 | int retval; | |
3299 | ||
3300 | /* mark timer as not initialized */ | |
3301 | udc_timer.data = 0; | |
3302 | udc_pollstall_timer.data = 0; | |
3303 | ||
3304 | /* device struct setup */ | |
55d402d8 TD |
3305 | dev->gadget.ops = &udc_ops; |
3306 | ||
0031a06e | 3307 | dev_set_name(&dev->gadget.dev, "gadget"); |
55d402d8 TD |
3308 | dev->gadget.dev.release = gadget_release; |
3309 | dev->gadget.name = name; | |
d327ab5b | 3310 | dev->gadget.max_speed = USB_SPEED_HIGH; |
55d402d8 | 3311 | |
55d402d8 TD |
3312 | /* init registers, interrupts, ... */ |
3313 | startup_registers(dev); | |
3314 | ||
3315 | dev_info(&dev->pdev->dev, "%s\n", mod_desc); | |
3316 | ||
3317 | snprintf(tmp, sizeof tmp, "%d", dev->irq); | |
3318 | dev_info(&dev->pdev->dev, | |
3319 | "irq %s, pci mem %08lx, chip rev %02x(Geode5536 %s)\n", | |
3320 | tmp, dev->phys_addr, dev->chiprev, | |
3321 | (dev->chiprev == UDC_HSA0_REV) ? "A0" : "B1"); | |
3322 | strcpy(tmp, UDC_DRIVER_VERSION_STRING); | |
3323 | if (dev->chiprev == UDC_HSA0_REV) { | |
3324 | dev_err(&dev->pdev->dev, "chip revision is A0; too old\n"); | |
3325 | retval = -ENODEV; | |
3326 | goto finished; | |
3327 | } | |
3328 | dev_info(&dev->pdev->dev, | |
3329 | "driver version: %s(for Geode5536 B1)\n", tmp); | |
3330 | udc = dev; | |
3331 | ||
0f91349b SAS |
3332 | retval = usb_add_gadget_udc(&udc->pdev->dev, &dev->gadget); |
3333 | if (retval) | |
3334 | goto finished; | |
3335 | ||
55d402d8 | 3336 | retval = device_register(&dev->gadget.dev); |
f34c25ed | 3337 | if (retval) { |
0f91349b | 3338 | usb_del_gadget_udc(&dev->gadget); |
f34c25ed | 3339 | put_device(&dev->gadget.dev); |
55d402d8 | 3340 | goto finished; |
f34c25ed | 3341 | } |
55d402d8 TD |
3342 | |
3343 | /* timer init */ | |
3344 | init_timer(&udc_timer); | |
3345 | udc_timer.function = udc_timer_function; | |
3346 | udc_timer.data = 1; | |
3347 | /* timer pollstall init */ | |
3348 | init_timer(&udc_pollstall_timer); | |
3349 | udc_pollstall_timer.function = udc_pollstall_timer_function; | |
3350 | udc_pollstall_timer.data = 1; | |
3351 | ||
3352 | /* set SD */ | |
3353 | reg = readl(&dev->regs->ctl); | |
3354 | reg |= AMD_BIT(UDC_DEVCTL_SD); | |
3355 | writel(reg, &dev->regs->ctl); | |
3356 | ||
3357 | /* print dev register info */ | |
3358 | print_regs(dev); | |
3359 | ||
3360 | return 0; | |
3361 | ||
3362 | finished: | |
3363 | return retval; | |
3364 | } | |
3365 | ||
3366 | /* Initiates a remote wakeup */ | |
3367 | static int udc_remote_wakeup(struct udc *dev) | |
3368 | { | |
3369 | unsigned long flags; | |
3370 | u32 tmp; | |
3371 | ||
3372 | DBG(dev, "UDC initiates remote wakeup\n"); | |
3373 | ||
3374 | spin_lock_irqsave(&dev->lock, flags); | |
3375 | ||
3376 | tmp = readl(&dev->regs->ctl); | |
3377 | tmp |= AMD_BIT(UDC_DEVCTL_RES); | |
3378 | writel(tmp, &dev->regs->ctl); | |
3379 | tmp &= AMD_CLEAR_BIT(UDC_DEVCTL_RES); | |
3380 | writel(tmp, &dev->regs->ctl); | |
3381 | ||
3382 | spin_unlock_irqrestore(&dev->lock, flags); | |
3383 | return 0; | |
3384 | } | |
3385 | ||
3386 | /* PCI device parameters */ | |
1b8860df | 3387 | static DEFINE_PCI_DEVICE_TABLE(pci_id) = { |
55d402d8 TD |
3388 | { |
3389 | PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x2096), | |
3390 | .class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe, | |
3391 | .class_mask = 0xffffffff, | |
3392 | }, | |
3393 | {}, | |
3394 | }; | |
3395 | MODULE_DEVICE_TABLE(pci, pci_id); | |
3396 | ||
3397 | /* PCI functions */ | |
3398 | static struct pci_driver udc_pci_driver = { | |
3399 | .name = (char *) name, | |
3400 | .id_table = pci_id, | |
3401 | .probe = udc_pci_probe, | |
3402 | .remove = udc_pci_remove, | |
3403 | }; | |
3404 | ||
3cdb7721 | 3405 | module_pci_driver(udc_pci_driver); |
55d402d8 TD |
3406 | |
3407 | MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION); | |
3408 | MODULE_AUTHOR("Thomas Dahlmann"); | |
3409 | MODULE_LICENSE("GPL"); | |
3410 |