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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> | |
3fa4d734 | 39 | #include <linux/usb/usb_phy_gen_xceiv.h> |
e8c4a7ac | 40 | #include <linux/platform_data/usb-omap.h> |
0f53e481 | 41 | #include <linux/sizes.h> |
9ecb8875 AKG |
42 | |
43 | #include <linux/of.h> | |
44 | #include <linux/of_device.h> | |
45 | #include <linux/of_address.h> | |
97238b35 | 46 | #include <linux/of_irq.h> |
c031a7d4 | 47 | #include <linux/usb/of.h> |
9ecb8875 | 48 | |
9ecb8875 AKG |
49 | #include "musb_core.h" |
50 | ||
65145677 | 51 | static const struct of_device_id musb_dsps_of_match[]; |
65145677 | 52 | |
9ecb8875 AKG |
53 | /** |
54 | * avoid using musb_readx()/musb_writex() as glue layer should not be | |
55 | * dependent on musb core layer symbols. | |
56 | */ | |
57 | static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) | |
58 | { return __raw_readb(addr + offset); } | |
59 | ||
60 | static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) | |
61 | { return __raw_readl(addr + offset); } | |
62 | ||
63 | static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) | |
64 | { __raw_writeb(data, addr + offset); } | |
65 | ||
66 | static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) | |
67 | { __raw_writel(data, addr + offset); } | |
68 | ||
69 | /** | |
70 | * DSPS musb wrapper register offset. | |
71 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS | |
72 | * musb ips. | |
73 | */ | |
74 | struct dsps_musb_wrapper { | |
75 | u16 revision; | |
76 | u16 control; | |
77 | u16 status; | |
9ecb8875 AKG |
78 | u16 epintr_set; |
79 | u16 epintr_clear; | |
80 | u16 epintr_status; | |
81 | u16 coreintr_set; | |
82 | u16 coreintr_clear; | |
83 | u16 coreintr_status; | |
84 | u16 phy_utmi; | |
85 | u16 mode; | |
86 | ||
87 | /* bit positions for control */ | |
88 | unsigned reset:5; | |
89 | ||
90 | /* bit positions for interrupt */ | |
91 | unsigned usb_shift:5; | |
92 | u32 usb_mask; | |
93 | u32 usb_bitmap; | |
94 | unsigned drvvbus:5; | |
95 | ||
96 | unsigned txep_shift:5; | |
97 | u32 txep_mask; | |
98 | u32 txep_bitmap; | |
99 | ||
100 | unsigned rxep_shift:5; | |
101 | u32 rxep_mask; | |
102 | u32 rxep_bitmap; | |
103 | ||
104 | /* bit positions for phy_utmi */ | |
105 | unsigned otg_disable:5; | |
106 | ||
107 | /* bit positions for mode */ | |
108 | unsigned iddig:5; | |
109 | /* miscellaneous stuff */ | |
9ecb8875 AKG |
110 | u8 poll_seconds; |
111 | }; | |
112 | ||
113 | /** | |
114 | * DSPS glue structure. | |
115 | */ | |
116 | struct dsps_glue { | |
117 | struct device *dev; | |
97238b35 | 118 | struct platform_device *musb; /* child musb pdev */ |
9ecb8875 | 119 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
97238b35 SAS |
120 | struct timer_list timer; /* otg_workaround timer */ |
121 | unsigned long last_timer; /* last timer data for each instance */ | |
9ecb8875 AKG |
122 | }; |
123 | ||
807d0d2b SAS |
124 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) |
125 | { | |
126 | struct device *dev = musb->controller; | |
127 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
128 | ||
129 | if (timeout == 0) | |
130 | timeout = jiffies + msecs_to_jiffies(3); | |
131 | ||
132 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
133 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
134 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
135 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
136 | usb_otg_state_string(musb->xceiv->state)); | |
137 | del_timer(&glue->timer); | |
138 | glue->last_timer = jiffies; | |
139 | return; | |
140 | } | |
24616eb6 | 141 | if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) |
807d0d2b SAS |
142 | return; |
143 | ||
144 | if (!musb->g.dev.driver) | |
145 | return; | |
146 | ||
147 | if (time_after(glue->last_timer, timeout) && | |
148 | timer_pending(&glue->timer)) { | |
149 | dev_dbg(musb->controller, | |
150 | "Longer idle timer already pending, ignoring...\n"); | |
151 | return; | |
152 | } | |
153 | glue->last_timer = timeout; | |
154 | ||
155 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
156 | usb_otg_state_string(musb->xceiv->state), | |
157 | jiffies_to_msecs(timeout - jiffies)); | |
158 | mod_timer(&glue->timer, timeout); | |
159 | } | |
160 | ||
9ecb8875 AKG |
161 | /** |
162 | * dsps_musb_enable - enable interrupts | |
163 | */ | |
164 | static void dsps_musb_enable(struct musb *musb) | |
165 | { | |
166 | struct device *dev = musb->controller; | |
167 | struct platform_device *pdev = to_platform_device(dev->parent); | |
168 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
169 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
170 | void __iomem *reg_base = musb->ctrl_base; | |
171 | u32 epmask, coremask; | |
172 | ||
173 | /* Workaround: setup IRQs through both register sets. */ | |
174 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
175 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
176 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
177 | ||
178 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
179 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
180 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
181 | dsps_writel(reg_base, wrp->coreintr_set, |
182 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
8b9fcce2 | 183 | dsps_musb_try_idle(musb, 0); |
9ecb8875 AKG |
184 | } |
185 | ||
186 | /** | |
187 | * dsps_musb_disable - disable HDRC and flush interrupts | |
188 | */ | |
189 | static void dsps_musb_disable(struct musb *musb) | |
190 | { | |
191 | struct device *dev = musb->controller; | |
192 | struct platform_device *pdev = to_platform_device(dev->parent); | |
193 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
194 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
195 | void __iomem *reg_base = musb->ctrl_base; | |
196 | ||
197 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
198 | dsps_writel(reg_base, wrp->epintr_clear, | |
199 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
200 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
9ecb8875 AKG |
201 | } |
202 | ||
203 | static void otg_timer(unsigned long _musb) | |
204 | { | |
205 | struct musb *musb = (void *)_musb; | |
206 | void __iomem *mregs = musb->mregs; | |
207 | struct device *dev = musb->controller; | |
db4a9320 | 208 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
209 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
210 | u8 devctl; | |
211 | unsigned long flags; | |
0f901c98 | 212 | int skip_session = 0; |
9ecb8875 AKG |
213 | |
214 | /* | |
215 | * We poll because DSPS IP's won't expose several OTG-critical | |
216 | * status change events (from the transceiver) otherwise. | |
217 | */ | |
218 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
219 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
42c0bf1c | 220 | usb_otg_state_string(musb->xceiv->state)); |
9ecb8875 AKG |
221 | |
222 | spin_lock_irqsave(&musb->lock, flags); | |
223 | switch (musb->xceiv->state) { | |
224 | case OTG_STATE_A_WAIT_BCON: | |
0f901c98 SAS |
225 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); |
226 | skip_session = 1; | |
227 | /* fall */ | |
9ecb8875 | 228 | |
0f901c98 SAS |
229 | case OTG_STATE_A_IDLE: |
230 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
231 | if (devctl & MUSB_DEVCTL_BDEVICE) { |
232 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
233 | MUSB_DEV_MODE(musb); | |
234 | } else { | |
235 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
236 | MUSB_HST_MODE(musb); | |
237 | } | |
0f901c98 SAS |
238 | if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session) |
239 | dsps_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); | |
240 | mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); | |
9ecb8875 AKG |
241 | break; |
242 | case OTG_STATE_A_WAIT_VFALL: | |
243 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
244 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
245 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
246 | break; | |
9ecb8875 AKG |
247 | default: |
248 | break; | |
249 | } | |
250 | spin_unlock_irqrestore(&musb->lock, flags); | |
251 | } | |
252 | ||
9ecb8875 AKG |
253 | static irqreturn_t dsps_interrupt(int irq, void *hci) |
254 | { | |
255 | struct musb *musb = hci; | |
256 | void __iomem *reg_base = musb->ctrl_base; | |
257 | struct device *dev = musb->controller; | |
db4a9320 | 258 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
259 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
260 | unsigned long flags; | |
261 | irqreturn_t ret = IRQ_NONE; | |
262 | u32 epintr, usbintr; | |
263 | ||
264 | spin_lock_irqsave(&musb->lock, flags); | |
265 | ||
266 | /* Get endpoint interrupts */ | |
267 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
268 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
269 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
270 | ||
271 | if (epintr) | |
272 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
273 | ||
274 | /* Get usb core interrupts */ | |
275 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
276 | if (!usbintr && !epintr) | |
9be73bae | 277 | goto out; |
9ecb8875 AKG |
278 | |
279 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
280 | if (usbintr) | |
281 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
282 | ||
283 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
284 | usbintr, epintr); | |
285 | /* | |
286 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
287 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
288 | * switch appropriately between halves of the OTG state machine. | |
289 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
290 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
291 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
292 | */ | |
96449f09 | 293 | if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) |
984e833c | 294 | pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); |
9ecb8875 AKG |
295 | |
296 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
297 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
298 | void __iomem *mregs = musb->mregs; | |
299 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
300 | int err; | |
301 | ||
032ec49f | 302 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
303 | if (err) { |
304 | /* | |
305 | * The Mentor core doesn't debounce VBUS as needed | |
306 | * to cope with device connect current spikes. This | |
307 | * means it's not uncommon for bus-powered devices | |
308 | * to get VBUS errors during enumeration. | |
309 | * | |
310 | * This is a workaround, but newer RTL from Mentor | |
311 | * seems to allow a better one: "re"-starting sessions | |
312 | * without waiting for VBUS to stop registering in | |
313 | * devctl. | |
314 | */ | |
315 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
316 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
97238b35 | 317 | mod_timer(&glue->timer, |
9ecb8875 AKG |
318 | jiffies + wrp->poll_seconds * HZ); |
319 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 320 | } else if (drvvbus) { |
9ecb8875 AKG |
321 | MUSB_HST_MODE(musb); |
322 | musb->xceiv->otg->default_a = 1; | |
323 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
97238b35 | 324 | del_timer(&glue->timer); |
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", | |
42c0bf1c | 335 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 AKG |
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 | ||
9ecb8875 | 344 | /* Poll for ID change */ |
032ec49f | 345 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
97238b35 | 346 | mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); |
9be73bae | 347 | out: |
9ecb8875 AKG |
348 | spin_unlock_irqrestore(&musb->lock, flags); |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | static int dsps_musb_init(struct musb *musb) | |
354 | { | |
355 | struct device *dev = musb->controller; | |
db4a9320 | 356 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
97238b35 | 357 | struct platform_device *parent = to_platform_device(dev->parent); |
9ecb8875 | 358 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
97238b35 SAS |
359 | void __iomem *reg_base; |
360 | struct resource *r; | |
9ecb8875 | 361 | u32 rev, val; |
9ecb8875 | 362 | |
97238b35 SAS |
363 | r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control"); |
364 | if (!r) | |
365 | return -EINVAL; | |
366 | ||
367 | reg_base = devm_ioremap_resource(dev, r); | |
51ef74f6 JL |
368 | if (IS_ERR(reg_base)) |
369 | return PTR_ERR(reg_base); | |
97238b35 | 370 | musb->ctrl_base = reg_base; |
9ecb8875 | 371 | |
d7554226 | 372 | /* NOP driver needs change if supporting dual instance */ |
97238b35 SAS |
373 | musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0); |
374 | if (IS_ERR(musb->xceiv)) | |
375 | return PTR_ERR(musb->xceiv); | |
9ecb8875 AKG |
376 | |
377 | /* Returns zero if e.g. not clocked */ | |
378 | rev = dsps_readl(reg_base, wrp->revision); | |
97238b35 SAS |
379 | if (!rev) |
380 | return -ENODEV; | |
9ecb8875 | 381 | |
7557a57f | 382 | usb_phy_init(musb->xceiv); |
97238b35 | 383 | setup_timer(&glue->timer, otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
384 | |
385 | /* Reset the musb */ | |
386 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
387 | ||
9ecb8875 AKG |
388 | musb->isr = dsps_interrupt; |
389 | ||
390 | /* reset the otgdisable bit, needed for host mode to work */ | |
391 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
392 | val &= ~(1 << wrp->otg_disable); | |
393 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
394 | ||
9ecb8875 | 395 | return 0; |
9ecb8875 AKG |
396 | } |
397 | ||
398 | static int dsps_musb_exit(struct musb *musb) | |
399 | { | |
400 | struct device *dev = musb->controller; | |
db4a9320 | 401 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 | 402 | |
97238b35 | 403 | del_timer_sync(&glue->timer); |
9ecb8875 | 404 | |
7557a57f | 405 | usb_phy_shutdown(musb->xceiv); |
9ecb8875 AKG |
406 | return 0; |
407 | } | |
408 | ||
409 | static struct musb_platform_ops dsps_ops = { | |
410 | .init = dsps_musb_init, | |
411 | .exit = dsps_musb_exit, | |
412 | ||
413 | .enable = dsps_musb_enable, | |
414 | .disable = dsps_musb_disable, | |
415 | ||
416 | .try_idle = dsps_musb_try_idle, | |
417 | }; | |
418 | ||
419 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
420 | ||
97238b35 | 421 | static int get_int_prop(struct device_node *dn, const char *s) |
9ecb8875 | 422 | { |
97238b35 SAS |
423 | int ret; |
424 | u32 val; | |
425 | ||
426 | ret = of_property_read_u32(dn, s, &val); | |
427 | if (ret) | |
428 | return 0; | |
429 | return val; | |
430 | } | |
431 | ||
c031a7d4 SAS |
432 | static int get_musb_port_mode(struct device *dev) |
433 | { | |
434 | enum usb_dr_mode mode; | |
435 | ||
436 | mode = of_usb_get_dr_mode(dev->of_node); | |
437 | switch (mode) { | |
438 | case USB_DR_MODE_HOST: | |
439 | return MUSB_PORT_MODE_HOST; | |
440 | ||
441 | case USB_DR_MODE_PERIPHERAL: | |
442 | return MUSB_PORT_MODE_GADGET; | |
443 | ||
444 | case USB_DR_MODE_UNKNOWN: | |
445 | case USB_DR_MODE_OTG: | |
446 | default: | |
447 | return MUSB_PORT_MODE_DUAL_ROLE; | |
2b84f92b | 448 | } |
c031a7d4 SAS |
449 | } |
450 | ||
97238b35 SAS |
451 | static int dsps_create_musb_pdev(struct dsps_glue *glue, |
452 | struct platform_device *parent) | |
453 | { | |
454 | struct musb_hdrc_platform_data pdata; | |
9ecb8875 | 455 | struct resource resources[2]; |
c031a7d4 | 456 | struct resource *res; |
97238b35 SAS |
457 | struct device *dev = &parent->dev; |
458 | struct musb_hdrc_config *config; | |
459 | struct platform_device *musb; | |
460 | struct device_node *dn = parent->dev.of_node; | |
2f771164 | 461 | int ret; |
9ecb8875 | 462 | |
97238b35 | 463 | memset(resources, 0, sizeof(resources)); |
c031a7d4 SAS |
464 | res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc"); |
465 | if (!res) { | |
97238b35 | 466 | dev_err(dev, "failed to get memory.\n"); |
c031a7d4 | 467 | return -EINVAL; |
9ecb8875 | 468 | } |
c031a7d4 | 469 | resources[0] = *res; |
97238b35 | 470 | |
c031a7d4 SAS |
471 | res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc"); |
472 | if (!res) { | |
97238b35 | 473 | dev_err(dev, "failed to get irq.\n"); |
c031a7d4 | 474 | return -EINVAL; |
9ecb8875 | 475 | } |
c031a7d4 | 476 | resources[1] = *res; |
9ecb8875 AKG |
477 | |
478 | /* allocate the child platform device */ | |
2f771164 | 479 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
480 | if (!musb) { |
481 | dev_err(dev, "failed to allocate musb device\n"); | |
97238b35 | 482 | return -ENOMEM; |
9ecb8875 AKG |
483 | } |
484 | ||
485 | musb->dev.parent = dev; | |
486 | musb->dev.dma_mask = &musb_dmamask; | |
487 | musb->dev.coherent_dma_mask = musb_dmamask; | |
c031a7d4 | 488 | musb->dev.of_node = of_node_get(dn); |
9ecb8875 | 489 | |
97238b35 | 490 | glue->musb = musb; |
9ecb8875 | 491 | |
97238b35 SAS |
492 | ret = platform_device_add_resources(musb, resources, |
493 | ARRAY_SIZE(resources)); | |
9ecb8875 AKG |
494 | if (ret) { |
495 | dev_err(dev, "failed to add resources\n"); | |
97238b35 | 496 | goto err; |
9ecb8875 AKG |
497 | } |
498 | ||
97238b35 SAS |
499 | config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL); |
500 | if (!config) { | |
501 | dev_err(dev, "failed to allocate musb hdrc config\n"); | |
502 | ret = -ENOMEM; | |
503 | goto err; | |
65145677 | 504 | } |
97238b35 SAS |
505 | pdata.config = config; |
506 | pdata.platform_ops = &dsps_ops; | |
65145677 | 507 | |
c031a7d4 SAS |
508 | config->num_eps = get_int_prop(dn, "mentor,num-eps"); |
509 | config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); | |
510 | pdata.mode = get_musb_port_mode(dev); | |
511 | /* DT keeps this entry in mA, musb expects it as per USB spec */ | |
512 | pdata.power = get_int_prop(dn, "mentor,power") / 2; | |
513 | config->multipoint = of_property_read_bool(dn, "mentor,multipoint"); | |
65145677 | 514 | |
97238b35 | 515 | ret = platform_device_add_data(musb, &pdata, sizeof(pdata)); |
9ecb8875 AKG |
516 | if (ret) { |
517 | dev_err(dev, "failed to add platform_data\n"); | |
97238b35 | 518 | goto err; |
9ecb8875 AKG |
519 | } |
520 | ||
521 | ret = platform_device_add(musb); | |
522 | if (ret) { | |
523 | dev_err(dev, "failed to register musb device\n"); | |
97238b35 | 524 | goto err; |
9ecb8875 | 525 | } |
9ecb8875 AKG |
526 | return 0; |
527 | ||
97238b35 | 528 | err: |
9ecb8875 | 529 | platform_device_put(musb); |
9ecb8875 AKG |
530 | return ret; |
531 | } | |
532 | ||
41ac7b3a | 533 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 534 | { |
65145677 AKG |
535 | const struct of_device_id *match; |
536 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 | 537 | struct dsps_glue *glue; |
97238b35 | 538 | int ret; |
9ecb8875 | 539 | |
4fc4b274 SAS |
540 | if (!strcmp(pdev->name, "musb-hdrc")) |
541 | return -ENODEV; | |
542 | ||
cc506036 | 543 | match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); |
65145677 AKG |
544 | if (!match) { |
545 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
97238b35 | 546 | return -EINVAL; |
65145677 AKG |
547 | } |
548 | wrp = match->data; | |
9ecb8875 AKG |
549 | |
550 | /* allocate glue */ | |
551 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
552 | if (!glue) { | |
553 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
97238b35 | 554 | return -ENOMEM; |
9ecb8875 AKG |
555 | } |
556 | ||
557 | glue->dev = &pdev->dev; | |
97238b35 | 558 | glue->wrp = wrp; |
9ecb8875 | 559 | |
9ecb8875 | 560 | platform_set_drvdata(pdev, glue); |
9ecb8875 AKG |
561 | pm_runtime_enable(&pdev->dev); |
562 | ||
563 | ret = pm_runtime_get_sync(&pdev->dev); | |
564 | if (ret < 0) { | |
565 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
566 | goto err2; |
567 | } | |
568 | ||
97238b35 SAS |
569 | ret = dsps_create_musb_pdev(glue, pdev); |
570 | if (ret) | |
571 | goto err3; | |
9ecb8875 AKG |
572 | |
573 | return 0; | |
574 | ||
575 | err3: | |
0e38c4ed | 576 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 577 | err2: |
0e38c4ed | 578 | pm_runtime_disable(&pdev->dev); |
9ecb8875 | 579 | kfree(glue); |
9ecb8875 AKG |
580 | return ret; |
581 | } | |
97238b35 | 582 | |
fb4e98ab | 583 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
584 | { |
585 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
586 | ||
97238b35 | 587 | platform_device_unregister(glue->musb); |
9ecb8875 AKG |
588 | |
589 | /* disable usbss clocks */ | |
590 | pm_runtime_put(&pdev->dev); | |
591 | pm_runtime_disable(&pdev->dev); | |
9ecb8875 AKG |
592 | kfree(glue); |
593 | return 0; | |
594 | } | |
595 | ||
fa7b4ca5 | 596 | static const struct dsps_musb_wrapper am33xx_driver_data = { |
9ecb8875 AKG |
597 | .revision = 0x00, |
598 | .control = 0x14, | |
599 | .status = 0x18, | |
9ecb8875 AKG |
600 | .epintr_set = 0x38, |
601 | .epintr_clear = 0x40, | |
602 | .epintr_status = 0x30, | |
603 | .coreintr_set = 0x3c, | |
604 | .coreintr_clear = 0x44, | |
605 | .coreintr_status = 0x34, | |
606 | .phy_utmi = 0xe0, | |
607 | .mode = 0xe8, | |
608 | .reset = 0, | |
609 | .otg_disable = 21, | |
610 | .iddig = 8, | |
611 | .usb_shift = 0, | |
612 | .usb_mask = 0x1ff, | |
613 | .usb_bitmap = (0x1ff << 0), | |
614 | .drvvbus = 8, | |
615 | .txep_shift = 0, | |
616 | .txep_mask = 0xffff, | |
617 | .txep_bitmap = (0xffff << 0), | |
618 | .rxep_shift = 16, | |
619 | .rxep_mask = 0xfffe, | |
620 | .rxep_bitmap = (0xfffe << 16), | |
9ecb8875 AKG |
621 | .poll_seconds = 2, |
622 | }; | |
623 | ||
2f82686e | 624 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 | 625 | { .compatible = "ti,musb-am33xx", |
fa7b4ca5 | 626 | .data = (void *) &am33xx_driver_data, }, |
9ecb8875 AKG |
627 | { }, |
628 | }; | |
629 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
630 | ||
631 | static struct platform_driver dsps_usbss_driver = { | |
632 | .probe = dsps_probe, | |
7690417d | 633 | .remove = dsps_remove, |
9ecb8875 AKG |
634 | .driver = { |
635 | .name = "musb-dsps", | |
b432cb83 | 636 | .of_match_table = musb_dsps_of_match, |
9ecb8875 | 637 | }, |
9ecb8875 AKG |
638 | }; |
639 | ||
640 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
641 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
642 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
643 | MODULE_LICENSE("GPL v2"); | |
644 | ||
97238b35 | 645 | module_platform_driver(dsps_usbss_driver); |