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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> | |
ded017ee | 34 | #include <linux/err.h> |
9ecb8875 AKG |
35 | #include <linux/platform_device.h> |
36 | #include <linux/dma-mapping.h> | |
37 | #include <linux/pm_runtime.h> | |
38 | #include <linux/module.h> | |
39 | ||
40 | #include <linux/of.h> | |
41 | #include <linux/of_device.h> | |
42 | #include <linux/of_address.h> | |
43 | ||
44 | #include <plat/usb.h> | |
45 | ||
46 | #include "musb_core.h" | |
47 | ||
48 | /** | |
49 | * avoid using musb_readx()/musb_writex() as glue layer should not be | |
50 | * dependent on musb core layer symbols. | |
51 | */ | |
52 | static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) | |
53 | { return __raw_readb(addr + offset); } | |
54 | ||
55 | static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) | |
56 | { return __raw_readl(addr + offset); } | |
57 | ||
58 | static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) | |
59 | { __raw_writeb(data, addr + offset); } | |
60 | ||
61 | static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) | |
62 | { __raw_writel(data, addr + offset); } | |
63 | ||
64 | /** | |
65 | * DSPS musb wrapper register offset. | |
66 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS | |
67 | * musb ips. | |
68 | */ | |
69 | struct dsps_musb_wrapper { | |
70 | u16 revision; | |
71 | u16 control; | |
72 | u16 status; | |
73 | u16 eoi; | |
74 | u16 epintr_set; | |
75 | u16 epintr_clear; | |
76 | u16 epintr_status; | |
77 | u16 coreintr_set; | |
78 | u16 coreintr_clear; | |
79 | u16 coreintr_status; | |
80 | u16 phy_utmi; | |
81 | u16 mode; | |
82 | ||
83 | /* bit positions for control */ | |
84 | unsigned reset:5; | |
85 | ||
86 | /* bit positions for interrupt */ | |
87 | unsigned usb_shift:5; | |
88 | u32 usb_mask; | |
89 | u32 usb_bitmap; | |
90 | unsigned drvvbus:5; | |
91 | ||
92 | unsigned txep_shift:5; | |
93 | u32 txep_mask; | |
94 | u32 txep_bitmap; | |
95 | ||
96 | unsigned rxep_shift:5; | |
97 | u32 rxep_mask; | |
98 | u32 rxep_bitmap; | |
99 | ||
100 | /* bit positions for phy_utmi */ | |
101 | unsigned otg_disable:5; | |
102 | ||
103 | /* bit positions for mode */ | |
104 | unsigned iddig:5; | |
105 | /* miscellaneous stuff */ | |
106 | u32 musb_core_offset; | |
107 | u8 poll_seconds; | |
db4a9320 R |
108 | /* number of musb instances */ |
109 | u8 instances; | |
9ecb8875 AKG |
110 | }; |
111 | ||
112 | /** | |
113 | * DSPS glue structure. | |
114 | */ | |
115 | struct dsps_glue { | |
116 | struct device *dev; | |
db4a9320 | 117 | struct platform_device *musb[2]; /* child musb pdev */ |
9ecb8875 | 118 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
db4a9320 R |
119 | struct timer_list timer[2]; /* otg_workaround timer */ |
120 | unsigned long last_timer[2]; /* last timer data for each instance */ | |
9ecb8875 AKG |
121 | }; |
122 | ||
123 | /** | |
124 | * dsps_musb_enable - enable interrupts | |
125 | */ | |
126 | static void dsps_musb_enable(struct musb *musb) | |
127 | { | |
128 | struct device *dev = musb->controller; | |
129 | struct platform_device *pdev = to_platform_device(dev->parent); | |
130 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
131 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
132 | void __iomem *reg_base = musb->ctrl_base; | |
133 | u32 epmask, coremask; | |
134 | ||
135 | /* Workaround: setup IRQs through both register sets. */ | |
136 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
137 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
138 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
139 | ||
140 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
141 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
142 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
143 | dsps_writel(reg_base, wrp->coreintr_set, |
144 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
9ecb8875 AKG |
145 | } |
146 | ||
147 | /** | |
148 | * dsps_musb_disable - disable HDRC and flush interrupts | |
149 | */ | |
150 | static void dsps_musb_disable(struct musb *musb) | |
151 | { | |
152 | struct device *dev = musb->controller; | |
153 | struct platform_device *pdev = to_platform_device(dev->parent); | |
154 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
155 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
156 | void __iomem *reg_base = musb->ctrl_base; | |
157 | ||
158 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
159 | dsps_writel(reg_base, wrp->epintr_clear, | |
160 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
161 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
162 | dsps_writel(reg_base, wrp->eoi, 0); | |
163 | } | |
164 | ||
165 | static void otg_timer(unsigned long _musb) | |
166 | { | |
167 | struct musb *musb = (void *)_musb; | |
168 | void __iomem *mregs = musb->mregs; | |
169 | struct device *dev = musb->controller; | |
db4a9320 R |
170 | struct platform_device *pdev = to_platform_device(dev); |
171 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
172 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
173 | u8 devctl; | |
174 | unsigned long flags; | |
175 | ||
176 | /* | |
177 | * We poll because DSPS IP's won't expose several OTG-critical | |
178 | * status change events (from the transceiver) otherwise. | |
179 | */ | |
180 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
181 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
182 | otg_state_string(musb->xceiv->state)); | |
183 | ||
184 | spin_lock_irqsave(&musb->lock, flags); | |
185 | switch (musb->xceiv->state) { | |
186 | case OTG_STATE_A_WAIT_BCON: | |
187 | devctl &= ~MUSB_DEVCTL_SESSION; | |
188 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
189 | ||
190 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); | |
191 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
192 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
193 | MUSB_DEV_MODE(musb); | |
194 | } else { | |
195 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
196 | MUSB_HST_MODE(musb); | |
197 | } | |
198 | break; | |
199 | case OTG_STATE_A_WAIT_VFALL: | |
200 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
201 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
202 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
203 | break; | |
204 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
205 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
206 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
db4a9320 | 207 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
208 | jiffies + wrp->poll_seconds * HZ); |
209 | else | |
210 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
211 | break; | |
212 | default: | |
213 | break; | |
214 | } | |
215 | spin_unlock_irqrestore(&musb->lock, flags); | |
216 | } | |
217 | ||
218 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) | |
219 | { | |
220 | struct device *dev = musb->controller; | |
db4a9320 R |
221 | struct platform_device *pdev = to_platform_device(dev); |
222 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 223 | |
9ecb8875 AKG |
224 | if (timeout == 0) |
225 | timeout = jiffies + msecs_to_jiffies(3); | |
226 | ||
227 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
228 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
229 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
230 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
231 | otg_state_string(musb->xceiv->state)); | |
db4a9320 R |
232 | del_timer(&glue->timer[pdev->id]); |
233 | glue->last_timer[pdev->id] = jiffies; | |
9ecb8875 AKG |
234 | return; |
235 | } | |
236 | ||
db4a9320 R |
237 | if (time_after(glue->last_timer[pdev->id], timeout) && |
238 | timer_pending(&glue->timer[pdev->id])) { | |
9ecb8875 AKG |
239 | dev_dbg(musb->controller, |
240 | "Longer idle timer already pending, ignoring...\n"); | |
241 | return; | |
242 | } | |
db4a9320 | 243 | glue->last_timer[pdev->id] = timeout; |
9ecb8875 AKG |
244 | |
245 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
246 | otg_state_string(musb->xceiv->state), | |
247 | jiffies_to_msecs(timeout - jiffies)); | |
db4a9320 | 248 | mod_timer(&glue->timer[pdev->id], timeout); |
9ecb8875 AKG |
249 | } |
250 | ||
251 | static irqreturn_t dsps_interrupt(int irq, void *hci) | |
252 | { | |
253 | struct musb *musb = hci; | |
254 | void __iomem *reg_base = musb->ctrl_base; | |
255 | struct device *dev = musb->controller; | |
db4a9320 R |
256 | struct platform_device *pdev = to_platform_device(dev); |
257 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
258 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
259 | unsigned long flags; | |
260 | irqreturn_t ret = IRQ_NONE; | |
261 | u32 epintr, usbintr; | |
262 | ||
263 | spin_lock_irqsave(&musb->lock, flags); | |
264 | ||
265 | /* Get endpoint interrupts */ | |
266 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
267 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
268 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
269 | ||
270 | if (epintr) | |
271 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
272 | ||
273 | /* Get usb core interrupts */ | |
274 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
275 | if (!usbintr && !epintr) | |
276 | goto eoi; | |
277 | ||
278 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
279 | if (usbintr) | |
280 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
281 | ||
282 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
283 | usbintr, epintr); | |
284 | /* | |
285 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
286 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
287 | * switch appropriately between halves of the OTG state machine. | |
288 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
289 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
290 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
291 | */ | |
032ec49f | 292 | if (usbintr & MUSB_INTR_BABBLE) |
9ecb8875 AKG |
293 | pr_info("CAUTION: musb: Babble Interrupt Occured\n"); |
294 | ||
295 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
296 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
297 | void __iomem *mregs = musb->mregs; | |
298 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
299 | int err; | |
300 | ||
032ec49f | 301 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
302 | if (err) { |
303 | /* | |
304 | * The Mentor core doesn't debounce VBUS as needed | |
305 | * to cope with device connect current spikes. This | |
306 | * means it's not uncommon for bus-powered devices | |
307 | * to get VBUS errors during enumeration. | |
308 | * | |
309 | * This is a workaround, but newer RTL from Mentor | |
310 | * seems to allow a better one: "re"-starting sessions | |
311 | * without waiting for VBUS to stop registering in | |
312 | * devctl. | |
313 | */ | |
314 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
315 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
db4a9320 | 316 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
317 | jiffies + wrp->poll_seconds * HZ); |
318 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 319 | } else if (drvvbus) { |
9ecb8875 AKG |
320 | musb->is_active = 1; |
321 | MUSB_HST_MODE(musb); | |
322 | musb->xceiv->otg->default_a = 1; | |
323 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
db4a9320 | 324 | del_timer(&glue->timer[pdev->id]); |
9ecb8875 AKG |
325 | } else { |
326 | musb->is_active = 0; | |
327 | MUSB_DEV_MODE(musb); | |
328 | musb->xceiv->otg->default_a = 0; | |
329 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
330 | } | |
331 | ||
332 | /* NOTE: this must complete power-on within 100 ms. */ | |
333 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
334 | drvvbus ? "on" : "off", | |
335 | otg_state_string(musb->xceiv->state), | |
336 | err ? " ERROR" : "", | |
337 | devctl); | |
338 | ret = IRQ_HANDLED; | |
339 | } | |
340 | ||
341 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
342 | ret |= musb_interrupt(musb); | |
343 | ||
344 | eoi: | |
345 | /* EOI needs to be written for the IRQ to be re-asserted. */ | |
346 | if (ret == IRQ_HANDLED || epintr || usbintr) | |
347 | dsps_writel(reg_base, wrp->eoi, 1); | |
348 | ||
349 | /* Poll for ID change */ | |
032ec49f | 350 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
db4a9320 R |
351 | mod_timer(&glue->timer[pdev->id], |
352 | jiffies + wrp->poll_seconds * HZ); | |
9ecb8875 AKG |
353 | |
354 | spin_unlock_irqrestore(&musb->lock, flags); | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
359 | static int dsps_musb_init(struct musb *musb) | |
360 | { | |
361 | struct device *dev = musb->controller; | |
362 | struct musb_hdrc_platform_data *plat = dev->platform_data; | |
db4a9320 R |
363 | struct platform_device *pdev = to_platform_device(dev); |
364 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
365 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
366 | struct omap_musb_board_data *data = plat->board_data; | |
367 | void __iomem *reg_base = musb->ctrl_base; | |
368 | u32 rev, val; | |
369 | int status; | |
370 | ||
371 | /* mentor core register starts at offset of 0x400 from musb base */ | |
372 | musb->mregs += wrp->musb_core_offset; | |
373 | ||
374 | /* NOP driver needs change if supporting dual instance */ | |
375 | usb_nop_xceiv_register(); | |
662dca54 | 376 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 377 | if (IS_ERR_OR_NULL(musb->xceiv)) |
9ecb8875 AKG |
378 | return -ENODEV; |
379 | ||
380 | /* Returns zero if e.g. not clocked */ | |
381 | rev = dsps_readl(reg_base, wrp->revision); | |
382 | if (!rev) { | |
383 | status = -ENODEV; | |
384 | goto err0; | |
385 | } | |
386 | ||
db4a9320 | 387 | setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
388 | |
389 | /* Reset the musb */ | |
390 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
391 | ||
392 | /* Start the on-chip PHY and its PLL. */ | |
393 | if (data->set_phy_power) | |
394 | data->set_phy_power(1); | |
395 | ||
396 | musb->isr = dsps_interrupt; | |
397 | ||
398 | /* reset the otgdisable bit, needed for host mode to work */ | |
399 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
400 | val &= ~(1 << wrp->otg_disable); | |
401 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
402 | ||
403 | /* clear level interrupt */ | |
404 | dsps_writel(reg_base, wrp->eoi, 0); | |
405 | ||
406 | return 0; | |
407 | err0: | |
721002ec | 408 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
409 | usb_nop_xceiv_unregister(); |
410 | return status; | |
411 | } | |
412 | ||
413 | static int dsps_musb_exit(struct musb *musb) | |
414 | { | |
415 | struct device *dev = musb->controller; | |
416 | struct musb_hdrc_platform_data *plat = dev->platform_data; | |
417 | struct omap_musb_board_data *data = plat->board_data; | |
db4a9320 R |
418 | struct platform_device *pdev = to_platform_device(dev); |
419 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 420 | |
db4a9320 | 421 | del_timer_sync(&glue->timer[pdev->id]); |
9ecb8875 AKG |
422 | |
423 | /* Shutdown the on-chip PHY and its PLL. */ | |
424 | if (data->set_phy_power) | |
425 | data->set_phy_power(0); | |
426 | ||
427 | /* NOP driver needs change if supporting dual instance */ | |
721002ec | 428 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
429 | usb_nop_xceiv_unregister(); |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
434 | static struct musb_platform_ops dsps_ops = { | |
435 | .init = dsps_musb_init, | |
436 | .exit = dsps_musb_exit, | |
437 | ||
438 | .enable = dsps_musb_enable, | |
439 | .disable = dsps_musb_disable, | |
440 | ||
441 | .try_idle = dsps_musb_try_idle, | |
442 | }; | |
443 | ||
444 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
445 | ||
446 | static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) | |
447 | { | |
448 | struct device *dev = glue->dev; | |
449 | struct platform_device *pdev = to_platform_device(dev); | |
450 | struct musb_hdrc_platform_data *pdata = dev->platform_data; | |
451 | struct platform_device *musb; | |
452 | struct resource *res; | |
453 | struct resource resources[2]; | |
454 | char res_name[10]; | |
65b3d52d | 455 | int ret, musbid; |
9ecb8875 AKG |
456 | |
457 | /* get memory resource */ | |
458 | sprintf(res_name, "musb%d", id); | |
459 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name); | |
460 | if (!res) { | |
461 | dev_err(dev, "%s get mem resource failed\n", res_name); | |
462 | ret = -ENODEV; | |
463 | goto err0; | |
464 | } | |
465 | res->parent = NULL; | |
466 | resources[0] = *res; | |
467 | ||
468 | /* get irq resource */ | |
469 | sprintf(res_name, "musb%d-irq", id); | |
470 | res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name); | |
471 | if (!res) { | |
472 | dev_err(dev, "%s get irq resource failed\n", res_name); | |
473 | ret = -ENODEV; | |
474 | goto err0; | |
475 | } | |
476 | strcpy((u8 *)res->name, "mc"); | |
477 | res->parent = NULL; | |
478 | resources[1] = *res; | |
479 | ||
65b3d52d R |
480 | /* get the musb id */ |
481 | musbid = musb_get_id(dev, GFP_KERNEL); | |
482 | if (musbid < 0) { | |
483 | dev_err(dev, "failed to allocate musb id\n"); | |
484 | ret = -ENOMEM; | |
485 | goto err0; | |
486 | } | |
9ecb8875 | 487 | /* allocate the child platform device */ |
65b3d52d | 488 | musb = platform_device_alloc("musb-hdrc", musbid); |
9ecb8875 AKG |
489 | if (!musb) { |
490 | dev_err(dev, "failed to allocate musb device\n"); | |
491 | ret = -ENOMEM; | |
65b3d52d | 492 | goto err1; |
9ecb8875 AKG |
493 | } |
494 | ||
65b3d52d | 495 | musb->id = musbid; |
9ecb8875 AKG |
496 | musb->dev.parent = dev; |
497 | musb->dev.dma_mask = &musb_dmamask; | |
498 | musb->dev.coherent_dma_mask = musb_dmamask; | |
499 | ||
db4a9320 | 500 | glue->musb[id] = musb; |
9ecb8875 AKG |
501 | |
502 | pdata->platform_ops = &dsps_ops; | |
503 | ||
504 | ret = platform_device_add_resources(musb, resources, 2); | |
505 | if (ret) { | |
506 | dev_err(dev, "failed to add resources\n"); | |
65b3d52d | 507 | goto err2; |
9ecb8875 AKG |
508 | } |
509 | ||
510 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); | |
511 | if (ret) { | |
512 | dev_err(dev, "failed to add platform_data\n"); | |
65b3d52d | 513 | goto err2; |
9ecb8875 AKG |
514 | } |
515 | ||
516 | ret = platform_device_add(musb); | |
517 | if (ret) { | |
518 | dev_err(dev, "failed to register musb device\n"); | |
65b3d52d | 519 | goto err2; |
9ecb8875 AKG |
520 | } |
521 | ||
522 | return 0; | |
523 | ||
65b3d52d | 524 | err2: |
9ecb8875 | 525 | platform_device_put(musb); |
65b3d52d R |
526 | err1: |
527 | musb_put_id(dev, musbid); | |
9ecb8875 AKG |
528 | err0: |
529 | return ret; | |
530 | } | |
531 | ||
db4a9320 | 532 | static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id) |
9ecb8875 | 533 | { |
db4a9320 R |
534 | musb_put_id(glue->dev, glue->musb[id]->id); |
535 | platform_device_del(glue->musb[id]); | |
536 | platform_device_put(glue->musb[id]); | |
9ecb8875 AKG |
537 | } |
538 | ||
539 | static int __devinit dsps_probe(struct platform_device *pdev) | |
540 | { | |
541 | const struct platform_device_id *id = platform_get_device_id(pdev); | |
542 | const struct dsps_musb_wrapper *wrp = | |
543 | (struct dsps_musb_wrapper *)id->driver_data; | |
544 | struct dsps_glue *glue; | |
545 | struct resource *iomem; | |
db4a9320 | 546 | int ret, i; |
9ecb8875 AKG |
547 | |
548 | /* allocate glue */ | |
549 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
550 | if (!glue) { | |
551 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
552 | ret = -ENOMEM; | |
553 | goto err0; | |
554 | } | |
555 | ||
556 | /* get memory resource */ | |
557 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
558 | if (!iomem) { | |
559 | dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); | |
560 | ret = -ENODEV; | |
561 | goto err1; | |
562 | } | |
563 | ||
564 | glue->dev = &pdev->dev; | |
565 | ||
566 | glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); | |
567 | if (!glue->wrp) { | |
568 | dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); | |
569 | ret = -ENOMEM; | |
570 | goto err1; | |
571 | } | |
572 | platform_set_drvdata(pdev, glue); | |
573 | ||
574 | /* create the child platform device for first instances of musb */ | |
575 | ret = dsps_create_musb_pdev(glue, 0); | |
576 | if (ret != 0) { | |
577 | dev_err(&pdev->dev, "failed to create child pdev\n"); | |
578 | goto err2; | |
579 | } | |
580 | ||
581 | /* enable the usbss clocks */ | |
582 | pm_runtime_enable(&pdev->dev); | |
583 | ||
584 | ret = pm_runtime_get_sync(&pdev->dev); | |
585 | if (ret < 0) { | |
586 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
db4a9320 R |
587 | /* create the child platform device for all instances of musb */ |
588 | for (i = 0; i < wrp->instances ; i++) { | |
589 | ret = dsps_create_musb_pdev(glue, i); | |
590 | if (ret != 0) { | |
591 | dev_err(&pdev->dev, "failed to create child pdev\n"); | |
592 | /* release resources of previously created instances */ | |
593 | for (i--; i >= 0 ; i--) | |
594 | dsps_delete_musb_pdev(glue, i); | |
595 | goto err3; | |
596 | } | |
9ecb8875 AKG |
597 | } |
598 | ||
599 | return 0; | |
600 | ||
601 | err3: | |
602 | pm_runtime_disable(&pdev->dev); | |
603 | err2: | |
604 | kfree(glue->wrp); | |
605 | err1: | |
606 | kfree(glue); | |
607 | err0: | |
608 | return ret; | |
609 | } | |
610 | static int __devexit dsps_remove(struct platform_device *pdev) | |
611 | { | |
612 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
db4a9320 R |
613 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
614 | int i; | |
9ecb8875 AKG |
615 | |
616 | /* delete the child platform device */ | |
db4a9320 R |
617 | for (i = 0; i < wrp->instances ; i++) |
618 | dsps_delete_musb_pdev(glue, i); | |
9ecb8875 AKG |
619 | |
620 | /* disable usbss clocks */ | |
621 | pm_runtime_put(&pdev->dev); | |
622 | pm_runtime_disable(&pdev->dev); | |
623 | kfree(glue->wrp); | |
624 | kfree(glue); | |
625 | return 0; | |
626 | } | |
627 | ||
628 | #ifdef CONFIG_PM_SLEEP | |
629 | static int dsps_suspend(struct device *dev) | |
630 | { | |
631 | struct musb_hdrc_platform_data *plat = dev->platform_data; | |
632 | struct omap_musb_board_data *data = plat->board_data; | |
633 | ||
634 | /* Shutdown the on-chip PHY and its PLL. */ | |
635 | if (data->set_phy_power) | |
636 | data->set_phy_power(0); | |
637 | ||
638 | return 0; | |
639 | } | |
640 | ||
641 | static int dsps_resume(struct device *dev) | |
642 | { | |
643 | struct musb_hdrc_platform_data *plat = dev->platform_data; | |
644 | struct omap_musb_board_data *data = plat->board_data; | |
645 | ||
646 | /* Start the on-chip PHY and its PLL. */ | |
647 | if (data->set_phy_power) | |
648 | data->set_phy_power(1); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | #endif | |
653 | ||
654 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); | |
655 | ||
656 | static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = { | |
657 | .revision = 0x00, | |
658 | .control = 0x14, | |
659 | .status = 0x18, | |
660 | .eoi = 0x24, | |
661 | .epintr_set = 0x38, | |
662 | .epintr_clear = 0x40, | |
663 | .epintr_status = 0x30, | |
664 | .coreintr_set = 0x3c, | |
665 | .coreintr_clear = 0x44, | |
666 | .coreintr_status = 0x34, | |
667 | .phy_utmi = 0xe0, | |
668 | .mode = 0xe8, | |
669 | .reset = 0, | |
670 | .otg_disable = 21, | |
671 | .iddig = 8, | |
672 | .usb_shift = 0, | |
673 | .usb_mask = 0x1ff, | |
674 | .usb_bitmap = (0x1ff << 0), | |
675 | .drvvbus = 8, | |
676 | .txep_shift = 0, | |
677 | .txep_mask = 0xffff, | |
678 | .txep_bitmap = (0xffff << 0), | |
679 | .rxep_shift = 16, | |
680 | .rxep_mask = 0xfffe, | |
681 | .rxep_bitmap = (0xfffe << 16), | |
682 | .musb_core_offset = 0x400, | |
683 | .poll_seconds = 2, | |
db4a9320 | 684 | .instances = 2, |
9ecb8875 AKG |
685 | }; |
686 | ||
687 | static const struct platform_device_id musb_dsps_id_table[] __devinitconst = { | |
688 | { | |
689 | .name = "musb-ti81xx", | |
690 | .driver_data = (kernel_ulong_t) &ti81xx_driver_data, | |
691 | }, | |
692 | { }, /* Terminating Entry */ | |
693 | }; | |
694 | MODULE_DEVICE_TABLE(platform, musb_dsps_id_table); | |
695 | ||
696 | static const struct of_device_id musb_dsps_of_match[] __devinitconst = { | |
697 | { .compatible = "musb-ti81xx", }, | |
698 | { .compatible = "ti,ti81xx-musb", }, | |
699 | { .compatible = "ti,am335x-musb", }, | |
700 | { }, | |
701 | }; | |
702 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
703 | ||
704 | static struct platform_driver dsps_usbss_driver = { | |
705 | .probe = dsps_probe, | |
706 | .remove = __devexit_p(dsps_remove), | |
707 | .driver = { | |
708 | .name = "musb-dsps", | |
709 | .pm = &dsps_pm_ops, | |
710 | .of_match_table = musb_dsps_of_match, | |
711 | }, | |
712 | .id_table = musb_dsps_id_table, | |
713 | }; | |
714 | ||
715 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
716 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
717 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
718 | MODULE_LICENSE("GPL v2"); | |
719 | ||
720 | static int __init dsps_init(void) | |
721 | { | |
722 | return platform_driver_register(&dsps_usbss_driver); | |
723 | } | |
724 | subsys_initcall(dsps_init); | |
725 | ||
726 | static void __exit dsps_exit(void) | |
727 | { | |
728 | platform_driver_unregister(&dsps_usbss_driver); | |
729 | } | |
730 | module_exit(dsps_exit); |