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9ecb8875 AKG |
1 | /* |
2 | * Texas Instruments DSPS platforms "glue layer" | |
3 | * | |
4 | * Copyright (C) 2012, by Texas Instruments | |
5 | * | |
6 | * Based on the am35x "glue layer" code. | |
7 | * | |
8 | * This file is part of the Inventra Controller Driver for Linux. | |
9 | * | |
10 | * The Inventra Controller Driver for Linux is free software; you | |
11 | * can redistribute it and/or modify it under the terms of the GNU | |
12 | * General Public License version 2 as published by the Free Software | |
13 | * Foundation. | |
14 | * | |
15 | * The Inventra Controller Driver for Linux is distributed in | |
16 | * the hope that it will be useful, but WITHOUT ANY WARRANTY; | |
17 | * without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
19 | * License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with The Inventra Controller Driver for Linux ; if not, | |
23 | * write to the Free Software Foundation, Inc., 59 Temple Place, | |
24 | * Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * musb_dsps.c will be a common file for all the TI DSPS platforms | |
27 | * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x. | |
28 | * For now only ti81x is using this and in future davinci.c, am35x.c | |
29 | * da8xx.c would be merged to this file after testing. | |
30 | */ | |
31 | ||
32 | #include <linux/init.h> | |
33 | #include <linux/io.h> | |
65145677 | 34 | #include <linux/of.h> |
ded017ee | 35 | #include <linux/err.h> |
9ecb8875 AKG |
36 | #include <linux/platform_device.h> |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/pm_runtime.h> | |
39 | #include <linux/module.h> | |
78c289f8 | 40 | #include <linux/usb/nop-usb-xceiv.h> |
9ecb8875 AKG |
41 | |
42 | #include <linux/of.h> | |
43 | #include <linux/of_device.h> | |
44 | #include <linux/of_address.h> | |
45 | ||
46 | #include <plat/usb.h> | |
47 | ||
48 | #include "musb_core.h" | |
49 | ||
65145677 AKG |
50 | #ifdef CONFIG_OF |
51 | static const struct of_device_id musb_dsps_of_match[]; | |
52 | #endif | |
53 | ||
9ecb8875 AKG |
54 | /** |
55 | * avoid using musb_readx()/musb_writex() as glue layer should not be | |
56 | * dependent on musb core layer symbols. | |
57 | */ | |
58 | static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) | |
59 | { return __raw_readb(addr + offset); } | |
60 | ||
61 | static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) | |
62 | { return __raw_readl(addr + offset); } | |
63 | ||
64 | static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) | |
65 | { __raw_writeb(data, addr + offset); } | |
66 | ||
67 | static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) | |
68 | { __raw_writel(data, addr + offset); } | |
69 | ||
70 | /** | |
71 | * DSPS musb wrapper register offset. | |
72 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS | |
73 | * musb ips. | |
74 | */ | |
75 | struct dsps_musb_wrapper { | |
76 | u16 revision; | |
77 | u16 control; | |
78 | u16 status; | |
79 | u16 eoi; | |
80 | u16 epintr_set; | |
81 | u16 epintr_clear; | |
82 | u16 epintr_status; | |
83 | u16 coreintr_set; | |
84 | u16 coreintr_clear; | |
85 | u16 coreintr_status; | |
86 | u16 phy_utmi; | |
87 | u16 mode; | |
88 | ||
89 | /* bit positions for control */ | |
90 | unsigned reset:5; | |
91 | ||
92 | /* bit positions for interrupt */ | |
93 | unsigned usb_shift:5; | |
94 | u32 usb_mask; | |
95 | u32 usb_bitmap; | |
96 | unsigned drvvbus:5; | |
97 | ||
98 | unsigned txep_shift:5; | |
99 | u32 txep_mask; | |
100 | u32 txep_bitmap; | |
101 | ||
102 | unsigned rxep_shift:5; | |
103 | u32 rxep_mask; | |
104 | u32 rxep_bitmap; | |
105 | ||
106 | /* bit positions for phy_utmi */ | |
107 | unsigned otg_disable:5; | |
108 | ||
109 | /* bit positions for mode */ | |
110 | unsigned iddig:5; | |
111 | /* miscellaneous stuff */ | |
112 | u32 musb_core_offset; | |
113 | u8 poll_seconds; | |
db4a9320 R |
114 | /* number of musb instances */ |
115 | u8 instances; | |
9ecb8875 AKG |
116 | }; |
117 | ||
118 | /** | |
119 | * DSPS glue structure. | |
120 | */ | |
121 | struct dsps_glue { | |
122 | struct device *dev; | |
db4a9320 | 123 | struct platform_device *musb[2]; /* child musb pdev */ |
9ecb8875 | 124 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
db4a9320 R |
125 | struct timer_list timer[2]; /* otg_workaround timer */ |
126 | unsigned long last_timer[2]; /* last timer data for each instance */ | |
9ecb8875 AKG |
127 | }; |
128 | ||
129 | /** | |
130 | * dsps_musb_enable - enable interrupts | |
131 | */ | |
132 | static void dsps_musb_enable(struct musb *musb) | |
133 | { | |
134 | struct device *dev = musb->controller; | |
135 | struct platform_device *pdev = to_platform_device(dev->parent); | |
136 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
137 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
138 | void __iomem *reg_base = musb->ctrl_base; | |
139 | u32 epmask, coremask; | |
140 | ||
141 | /* Workaround: setup IRQs through both register sets. */ | |
142 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
143 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
144 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
145 | ||
146 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
147 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
148 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
149 | dsps_writel(reg_base, wrp->coreintr_set, |
150 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
9ecb8875 AKG |
151 | } |
152 | ||
153 | /** | |
154 | * dsps_musb_disable - disable HDRC and flush interrupts | |
155 | */ | |
156 | static void dsps_musb_disable(struct musb *musb) | |
157 | { | |
158 | struct device *dev = musb->controller; | |
159 | struct platform_device *pdev = to_platform_device(dev->parent); | |
160 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
161 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
162 | void __iomem *reg_base = musb->ctrl_base; | |
163 | ||
164 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
165 | dsps_writel(reg_base, wrp->epintr_clear, | |
166 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
167 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
168 | dsps_writel(reg_base, wrp->eoi, 0); | |
169 | } | |
170 | ||
171 | static void otg_timer(unsigned long _musb) | |
172 | { | |
173 | struct musb *musb = (void *)_musb; | |
174 | void __iomem *mregs = musb->mregs; | |
175 | struct device *dev = musb->controller; | |
db4a9320 R |
176 | struct platform_device *pdev = to_platform_device(dev); |
177 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
178 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
179 | u8 devctl; | |
180 | unsigned long flags; | |
181 | ||
182 | /* | |
183 | * We poll because DSPS IP's won't expose several OTG-critical | |
184 | * status change events (from the transceiver) otherwise. | |
185 | */ | |
186 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
187 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
188 | otg_state_string(musb->xceiv->state)); | |
189 | ||
190 | spin_lock_irqsave(&musb->lock, flags); | |
191 | switch (musb->xceiv->state) { | |
192 | case OTG_STATE_A_WAIT_BCON: | |
193 | devctl &= ~MUSB_DEVCTL_SESSION; | |
194 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
195 | ||
196 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); | |
197 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
198 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
199 | MUSB_DEV_MODE(musb); | |
200 | } else { | |
201 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
202 | MUSB_HST_MODE(musb); | |
203 | } | |
204 | break; | |
205 | case OTG_STATE_A_WAIT_VFALL: | |
206 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
207 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
208 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
209 | break; | |
210 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
211 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
212 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
db4a9320 | 213 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
214 | jiffies + wrp->poll_seconds * HZ); |
215 | else | |
216 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
217 | break; | |
218 | default: | |
219 | break; | |
220 | } | |
221 | spin_unlock_irqrestore(&musb->lock, flags); | |
222 | } | |
223 | ||
224 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) | |
225 | { | |
226 | struct device *dev = musb->controller; | |
db4a9320 R |
227 | struct platform_device *pdev = to_platform_device(dev); |
228 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
229 | |
230 | if (timeout == 0) | |
231 | timeout = jiffies + msecs_to_jiffies(3); | |
232 | ||
233 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
234 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
235 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
236 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
237 | otg_state_string(musb->xceiv->state)); | |
db4a9320 R |
238 | del_timer(&glue->timer[pdev->id]); |
239 | glue->last_timer[pdev->id] = jiffies; | |
9ecb8875 AKG |
240 | return; |
241 | } | |
242 | ||
db4a9320 R |
243 | if (time_after(glue->last_timer[pdev->id], timeout) && |
244 | timer_pending(&glue->timer[pdev->id])) { | |
9ecb8875 AKG |
245 | dev_dbg(musb->controller, |
246 | "Longer idle timer already pending, ignoring...\n"); | |
247 | return; | |
248 | } | |
db4a9320 | 249 | glue->last_timer[pdev->id] = timeout; |
9ecb8875 AKG |
250 | |
251 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
252 | otg_state_string(musb->xceiv->state), | |
253 | jiffies_to_msecs(timeout - jiffies)); | |
db4a9320 | 254 | mod_timer(&glue->timer[pdev->id], timeout); |
9ecb8875 AKG |
255 | } |
256 | ||
257 | static irqreturn_t dsps_interrupt(int irq, void *hci) | |
258 | { | |
259 | struct musb *musb = hci; | |
260 | void __iomem *reg_base = musb->ctrl_base; | |
261 | struct device *dev = musb->controller; | |
db4a9320 R |
262 | struct platform_device *pdev = to_platform_device(dev); |
263 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
264 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
265 | unsigned long flags; | |
266 | irqreturn_t ret = IRQ_NONE; | |
267 | u32 epintr, usbintr; | |
268 | ||
269 | spin_lock_irqsave(&musb->lock, flags); | |
270 | ||
271 | /* Get endpoint interrupts */ | |
272 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
273 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
274 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
275 | ||
276 | if (epintr) | |
277 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
278 | ||
279 | /* Get usb core interrupts */ | |
280 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
281 | if (!usbintr && !epintr) | |
282 | goto eoi; | |
283 | ||
284 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
285 | if (usbintr) | |
286 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
287 | ||
288 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
289 | usbintr, epintr); | |
290 | /* | |
291 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
292 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
293 | * switch appropriately between halves of the OTG state machine. | |
294 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
295 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
296 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
297 | */ | |
032ec49f | 298 | if (usbintr & MUSB_INTR_BABBLE) |
9ecb8875 AKG |
299 | pr_info("CAUTION: musb: Babble Interrupt Occured\n"); |
300 | ||
301 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
302 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
303 | void __iomem *mregs = musb->mregs; | |
304 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
305 | int err; | |
306 | ||
032ec49f | 307 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
308 | if (err) { |
309 | /* | |
310 | * The Mentor core doesn't debounce VBUS as needed | |
311 | * to cope with device connect current spikes. This | |
312 | * means it's not uncommon for bus-powered devices | |
313 | * to get VBUS errors during enumeration. | |
314 | * | |
315 | * This is a workaround, but newer RTL from Mentor | |
316 | * seems to allow a better one: "re"-starting sessions | |
317 | * without waiting for VBUS to stop registering in | |
318 | * devctl. | |
319 | */ | |
320 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
321 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
db4a9320 | 322 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
323 | jiffies + wrp->poll_seconds * HZ); |
324 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 325 | } else if (drvvbus) { |
9ecb8875 AKG |
326 | musb->is_active = 1; |
327 | MUSB_HST_MODE(musb); | |
328 | musb->xceiv->otg->default_a = 1; | |
329 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
db4a9320 | 330 | del_timer(&glue->timer[pdev->id]); |
9ecb8875 AKG |
331 | } else { |
332 | musb->is_active = 0; | |
333 | MUSB_DEV_MODE(musb); | |
334 | musb->xceiv->otg->default_a = 0; | |
335 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
336 | } | |
337 | ||
338 | /* NOTE: this must complete power-on within 100 ms. */ | |
339 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
340 | drvvbus ? "on" : "off", | |
341 | otg_state_string(musb->xceiv->state), | |
342 | err ? " ERROR" : "", | |
343 | devctl); | |
344 | ret = IRQ_HANDLED; | |
345 | } | |
346 | ||
347 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
348 | ret |= musb_interrupt(musb); | |
349 | ||
350 | eoi: | |
351 | /* EOI needs to be written for the IRQ to be re-asserted. */ | |
352 | if (ret == IRQ_HANDLED || epintr || usbintr) | |
353 | dsps_writel(reg_base, wrp->eoi, 1); | |
354 | ||
355 | /* Poll for ID change */ | |
032ec49f | 356 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
db4a9320 R |
357 | mod_timer(&glue->timer[pdev->id], |
358 | jiffies + wrp->poll_seconds * HZ); | |
9ecb8875 AKG |
359 | |
360 | spin_unlock_irqrestore(&musb->lock, flags); | |
361 | ||
362 | return ret; | |
363 | } | |
364 | ||
365 | static int dsps_musb_init(struct musb *musb) | |
366 | { | |
367 | struct device *dev = musb->controller; | |
db4a9320 R |
368 | struct platform_device *pdev = to_platform_device(dev); |
369 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 370 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
9ecb8875 AKG |
371 | void __iomem *reg_base = musb->ctrl_base; |
372 | u32 rev, val; | |
373 | int status; | |
374 | ||
375 | /* mentor core register starts at offset of 0x400 from musb base */ | |
376 | musb->mregs += wrp->musb_core_offset; | |
377 | ||
d8c3ef25 | 378 | /* Get the NOP PHY */ |
662dca54 | 379 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 380 | if (IS_ERR_OR_NULL(musb->xceiv)) |
9ecb8875 AKG |
381 | return -ENODEV; |
382 | ||
383 | /* Returns zero if e.g. not clocked */ | |
384 | rev = dsps_readl(reg_base, wrp->revision); | |
385 | if (!rev) { | |
386 | status = -ENODEV; | |
387 | goto err0; | |
388 | } | |
389 | ||
db4a9320 | 390 | setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
391 | |
392 | /* Reset the musb */ | |
393 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
394 | ||
9ecb8875 AKG |
395 | musb->isr = dsps_interrupt; |
396 | ||
397 | /* reset the otgdisable bit, needed for host mode to work */ | |
398 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
399 | val &= ~(1 << wrp->otg_disable); | |
400 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
401 | ||
402 | /* clear level interrupt */ | |
403 | dsps_writel(reg_base, wrp->eoi, 0); | |
404 | ||
405 | return 0; | |
406 | err0: | |
721002ec | 407 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
408 | usb_nop_xceiv_unregister(); |
409 | return status; | |
410 | } | |
411 | ||
412 | static int dsps_musb_exit(struct musb *musb) | |
413 | { | |
414 | struct device *dev = musb->controller; | |
db4a9320 R |
415 | struct platform_device *pdev = to_platform_device(dev); |
416 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 417 | |
db4a9320 | 418 | del_timer_sync(&glue->timer[pdev->id]); |
9ecb8875 | 419 | |
9ecb8875 | 420 | /* NOP driver needs change if supporting dual instance */ |
721002ec | 421 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
422 | usb_nop_xceiv_unregister(); |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static struct musb_platform_ops dsps_ops = { | |
428 | .init = dsps_musb_init, | |
429 | .exit = dsps_musb_exit, | |
430 | ||
431 | .enable = dsps_musb_enable, | |
432 | .disable = dsps_musb_disable, | |
433 | ||
434 | .try_idle = dsps_musb_try_idle, | |
435 | }; | |
436 | ||
437 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
438 | ||
439 | static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) | |
440 | { | |
441 | struct device *dev = glue->dev; | |
442 | struct platform_device *pdev = to_platform_device(dev); | |
443 | struct musb_hdrc_platform_data *pdata = dev->platform_data; | |
65145677 AKG |
444 | struct device_node *np = pdev->dev.of_node; |
445 | struct musb_hdrc_config *config; | |
9ecb8875 AKG |
446 | struct platform_device *musb; |
447 | struct resource *res; | |
448 | struct resource resources[2]; | |
449 | char res_name[10]; | |
2f771164 | 450 | int ret; |
9ecb8875 | 451 | |
3e594b18 AM |
452 | /* first resource is for usbss, so start index from 1 */ |
453 | res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1); | |
9ecb8875 | 454 | if (!res) { |
3e594b18 | 455 | dev_err(dev, "failed to get memory for instance %d\n", id); |
9ecb8875 AKG |
456 | ret = -ENODEV; |
457 | goto err0; | |
458 | } | |
459 | res->parent = NULL; | |
460 | resources[0] = *res; | |
461 | ||
3e594b18 AM |
462 | /* first resource is for usbss, so start index from 1 */ |
463 | res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1); | |
9ecb8875 | 464 | if (!res) { |
3e594b18 | 465 | dev_err(dev, "failed to get irq for instance %d\n", id); |
9ecb8875 AKG |
466 | ret = -ENODEV; |
467 | goto err0; | |
468 | } | |
9ecb8875 AKG |
469 | res->parent = NULL; |
470 | resources[1] = *res; | |
3bb55348 | 471 | resources[1].name = "mc"; |
9ecb8875 AKG |
472 | |
473 | /* allocate the child platform device */ | |
2f771164 | 474 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
475 | if (!musb) { |
476 | dev_err(dev, "failed to allocate musb device\n"); | |
477 | ret = -ENOMEM; | |
2f771164 | 478 | goto err0; |
9ecb8875 AKG |
479 | } |
480 | ||
481 | musb->dev.parent = dev; | |
482 | musb->dev.dma_mask = &musb_dmamask; | |
483 | musb->dev.coherent_dma_mask = musb_dmamask; | |
484 | ||
db4a9320 | 485 | glue->musb[id] = musb; |
9ecb8875 AKG |
486 | |
487 | ret = platform_device_add_resources(musb, resources, 2); | |
488 | if (ret) { | |
489 | dev_err(dev, "failed to add resources\n"); | |
65b3d52d | 490 | goto err2; |
9ecb8875 AKG |
491 | } |
492 | ||
65145677 AKG |
493 | if (np) { |
494 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
495 | if (!pdata) { | |
496 | dev_err(&pdev->dev, | |
497 | "failed to allocate musb platfrom data\n"); | |
498 | ret = -ENOMEM; | |
499 | goto err2; | |
500 | } | |
501 | ||
502 | config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); | |
503 | if (!config) { | |
504 | dev_err(&pdev->dev, | |
505 | "failed to allocate musb hdrc config\n"); | |
506 | goto err2; | |
507 | } | |
508 | ||
509 | of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); | |
510 | of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); | |
511 | sprintf(res_name, "port%d-mode", id); | |
512 | of_property_read_u32(np, res_name, (u32 *)&pdata->mode); | |
513 | of_property_read_u32(np, "power", (u32 *)&pdata->power); | |
514 | config->multipoint = of_property_read_bool(np, "multipoint"); | |
515 | ||
516 | pdata->config = config; | |
517 | } | |
518 | ||
519 | pdata->platform_ops = &dsps_ops; | |
520 | ||
9ecb8875 AKG |
521 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); |
522 | if (ret) { | |
523 | dev_err(dev, "failed to add platform_data\n"); | |
65b3d52d | 524 | goto err2; |
9ecb8875 AKG |
525 | } |
526 | ||
527 | ret = platform_device_add(musb); | |
528 | if (ret) { | |
529 | dev_err(dev, "failed to register musb device\n"); | |
65b3d52d | 530 | goto err2; |
9ecb8875 AKG |
531 | } |
532 | ||
533 | return 0; | |
534 | ||
65b3d52d | 535 | err2: |
9ecb8875 AKG |
536 | platform_device_put(musb); |
537 | err0: | |
538 | return ret; | |
539 | } | |
540 | ||
9ecb8875 AKG |
541 | static int __devinit dsps_probe(struct platform_device *pdev) |
542 | { | |
65145677 AKG |
543 | struct device_node *np = pdev->dev.of_node; |
544 | const struct of_device_id *match; | |
545 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 AKG |
546 | struct dsps_glue *glue; |
547 | struct resource *iomem; | |
db4a9320 | 548 | int ret, i; |
9ecb8875 | 549 | |
65145677 AKG |
550 | match = of_match_node(musb_dsps_of_match, np); |
551 | if (!match) { | |
552 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
553 | ret = -EINVAL; | |
554 | goto err0; | |
555 | } | |
556 | wrp = match->data; | |
9ecb8875 AKG |
557 | |
558 | /* allocate glue */ | |
559 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
560 | if (!glue) { | |
561 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
562 | ret = -ENOMEM; | |
563 | goto err0; | |
564 | } | |
565 | ||
566 | /* get memory resource */ | |
567 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
568 | if (!iomem) { | |
569 | dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); | |
570 | ret = -ENODEV; | |
571 | goto err1; | |
572 | } | |
573 | ||
574 | glue->dev = &pdev->dev; | |
575 | ||
576 | glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); | |
577 | if (!glue->wrp) { | |
578 | dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); | |
579 | ret = -ENOMEM; | |
580 | goto err1; | |
581 | } | |
582 | platform_set_drvdata(pdev, glue); | |
583 | ||
9ecb8875 AKG |
584 | /* enable the usbss clocks */ |
585 | pm_runtime_enable(&pdev->dev); | |
586 | ||
587 | ret = pm_runtime_get_sync(&pdev->dev); | |
588 | if (ret < 0) { | |
589 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
590 | goto err2; |
591 | } | |
592 | ||
db4a9320 R |
593 | /* create the child platform device for all instances of musb */ |
594 | for (i = 0; i < wrp->instances ; i++) { | |
595 | ret = dsps_create_musb_pdev(glue, i); | |
596 | if (ret != 0) { | |
597 | dev_err(&pdev->dev, "failed to create child pdev\n"); | |
598 | /* release resources of previously created instances */ | |
599 | for (i--; i >= 0 ; i--) | |
2f771164 | 600 | platform_device_unregister(glue->musb[i]); |
db4a9320 R |
601 | goto err3; |
602 | } | |
9ecb8875 AKG |
603 | } |
604 | ||
605 | return 0; | |
606 | ||
607 | err3: | |
0e38c4ed | 608 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 609 | err2: |
0e38c4ed | 610 | pm_runtime_disable(&pdev->dev); |
9ecb8875 AKG |
611 | kfree(glue->wrp); |
612 | err1: | |
613 | kfree(glue); | |
614 | err0: | |
615 | return ret; | |
616 | } | |
617 | static int __devexit dsps_remove(struct platform_device *pdev) | |
618 | { | |
619 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
db4a9320 R |
620 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
621 | int i; | |
9ecb8875 AKG |
622 | |
623 | /* delete the child platform device */ | |
db4a9320 | 624 | for (i = 0; i < wrp->instances ; i++) |
2f771164 | 625 | platform_device_unregister(glue->musb[i]); |
9ecb8875 AKG |
626 | |
627 | /* disable usbss clocks */ | |
628 | pm_runtime_put(&pdev->dev); | |
629 | pm_runtime_disable(&pdev->dev); | |
630 | kfree(glue->wrp); | |
631 | kfree(glue); | |
632 | return 0; | |
633 | } | |
634 | ||
635 | #ifdef CONFIG_PM_SLEEP | |
636 | static int dsps_suspend(struct device *dev) | |
637 | { | |
9ecb8875 AKG |
638 | return 0; |
639 | } | |
640 | ||
641 | static int dsps_resume(struct device *dev) | |
642 | { | |
9ecb8875 AKG |
643 | return 0; |
644 | } | |
645 | #endif | |
646 | ||
647 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); | |
648 | ||
649 | static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = { | |
650 | .revision = 0x00, | |
651 | .control = 0x14, | |
652 | .status = 0x18, | |
653 | .eoi = 0x24, | |
654 | .epintr_set = 0x38, | |
655 | .epintr_clear = 0x40, | |
656 | .epintr_status = 0x30, | |
657 | .coreintr_set = 0x3c, | |
658 | .coreintr_clear = 0x44, | |
659 | .coreintr_status = 0x34, | |
660 | .phy_utmi = 0xe0, | |
661 | .mode = 0xe8, | |
662 | .reset = 0, | |
663 | .otg_disable = 21, | |
664 | .iddig = 8, | |
665 | .usb_shift = 0, | |
666 | .usb_mask = 0x1ff, | |
667 | .usb_bitmap = (0x1ff << 0), | |
668 | .drvvbus = 8, | |
669 | .txep_shift = 0, | |
670 | .txep_mask = 0xffff, | |
671 | .txep_bitmap = (0xffff << 0), | |
672 | .rxep_shift = 16, | |
673 | .rxep_mask = 0xfffe, | |
674 | .rxep_bitmap = (0xfffe << 16), | |
675 | .musb_core_offset = 0x400, | |
676 | .poll_seconds = 2, | |
3b46dd76 | 677 | .instances = 1, |
9ecb8875 AKG |
678 | }; |
679 | ||
680 | static const struct platform_device_id musb_dsps_id_table[] __devinitconst = { | |
681 | { | |
682 | .name = "musb-ti81xx", | |
683 | .driver_data = (kernel_ulong_t) &ti81xx_driver_data, | |
684 | }, | |
685 | { }, /* Terminating Entry */ | |
686 | }; | |
687 | MODULE_DEVICE_TABLE(platform, musb_dsps_id_table); | |
688 | ||
65145677 | 689 | #ifdef CONFIG_OF |
9ecb8875 | 690 | static const struct of_device_id musb_dsps_of_match[] __devinitconst = { |
65145677 AKG |
691 | { .compatible = "ti,musb-am33xx", |
692 | .data = (void *) &ti81xx_driver_data, }, | |
9ecb8875 AKG |
693 | { }, |
694 | }; | |
695 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
65145677 | 696 | #endif |
9ecb8875 AKG |
697 | |
698 | static struct platform_driver dsps_usbss_driver = { | |
699 | .probe = dsps_probe, | |
700 | .remove = __devexit_p(dsps_remove), | |
701 | .driver = { | |
702 | .name = "musb-dsps", | |
703 | .pm = &dsps_pm_ops, | |
65145677 | 704 | .of_match_table = of_match_ptr(musb_dsps_of_match), |
9ecb8875 AKG |
705 | }, |
706 | .id_table = musb_dsps_id_table, | |
707 | }; | |
708 | ||
709 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
710 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
711 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
712 | MODULE_LICENSE("GPL v2"); | |
713 | ||
714 | static int __init dsps_init(void) | |
715 | { | |
716 | return platform_driver_register(&dsps_usbss_driver); | |
717 | } | |
718 | subsys_initcall(dsps_init); | |
719 | ||
720 | static void __exit dsps_exit(void) | |
721 | { | |
722 | platform_driver_unregister(&dsps_usbss_driver); | |
723 | } | |
724 | module_exit(dsps_exit); |