Commit | Line | Data |
---|---|---|
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; | |
943c1397 | 109 | unsigned iddig_mux:5; |
9ecb8875 | 110 | /* miscellaneous stuff */ |
9ecb8875 AKG |
111 | u8 poll_seconds; |
112 | }; | |
113 | ||
114 | /** | |
115 | * DSPS glue structure. | |
116 | */ | |
117 | struct dsps_glue { | |
118 | struct device *dev; | |
97238b35 | 119 | struct platform_device *musb; /* child musb pdev */ |
9ecb8875 | 120 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
97238b35 SAS |
121 | struct timer_list timer; /* otg_workaround timer */ |
122 | unsigned long last_timer; /* last timer data for each instance */ | |
9ecb8875 AKG |
123 | }; |
124 | ||
807d0d2b SAS |
125 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) |
126 | { | |
127 | struct device *dev = musb->controller; | |
128 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
129 | ||
130 | if (timeout == 0) | |
131 | timeout = jiffies + msecs_to_jiffies(3); | |
132 | ||
133 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
134 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
135 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
136 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
137 | usb_otg_state_string(musb->xceiv->state)); | |
138 | del_timer(&glue->timer); | |
139 | glue->last_timer = jiffies; | |
140 | return; | |
141 | } | |
24616eb6 | 142 | if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) |
807d0d2b SAS |
143 | return; |
144 | ||
145 | if (!musb->g.dev.driver) | |
146 | return; | |
147 | ||
148 | if (time_after(glue->last_timer, timeout) && | |
149 | timer_pending(&glue->timer)) { | |
150 | dev_dbg(musb->controller, | |
151 | "Longer idle timer already pending, ignoring...\n"); | |
152 | return; | |
153 | } | |
154 | glue->last_timer = timeout; | |
155 | ||
156 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
157 | usb_otg_state_string(musb->xceiv->state), | |
158 | jiffies_to_msecs(timeout - jiffies)); | |
159 | mod_timer(&glue->timer, timeout); | |
160 | } | |
161 | ||
9ecb8875 AKG |
162 | /** |
163 | * dsps_musb_enable - enable interrupts | |
164 | */ | |
165 | static void dsps_musb_enable(struct musb *musb) | |
166 | { | |
167 | struct device *dev = musb->controller; | |
168 | struct platform_device *pdev = to_platform_device(dev->parent); | |
169 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
170 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
171 | void __iomem *reg_base = musb->ctrl_base; | |
172 | u32 epmask, coremask; | |
173 | ||
174 | /* Workaround: setup IRQs through both register sets. */ | |
175 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
176 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
177 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
178 | ||
179 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
180 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
181 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
182 | dsps_writel(reg_base, wrp->coreintr_set, |
183 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
8b9fcce2 | 184 | dsps_musb_try_idle(musb, 0); |
9ecb8875 AKG |
185 | } |
186 | ||
187 | /** | |
188 | * dsps_musb_disable - disable HDRC and flush interrupts | |
189 | */ | |
190 | static void dsps_musb_disable(struct musb *musb) | |
191 | { | |
192 | struct device *dev = musb->controller; | |
193 | struct platform_device *pdev = to_platform_device(dev->parent); | |
194 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
195 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
196 | void __iomem *reg_base = musb->ctrl_base; | |
197 | ||
198 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
199 | dsps_writel(reg_base, wrp->epintr_clear, | |
200 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
201 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
9ecb8875 AKG |
202 | } |
203 | ||
204 | static void otg_timer(unsigned long _musb) | |
205 | { | |
206 | struct musb *musb = (void *)_musb; | |
207 | void __iomem *mregs = musb->mregs; | |
208 | struct device *dev = musb->controller; | |
db4a9320 | 209 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
210 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
211 | u8 devctl; | |
212 | unsigned long flags; | |
0f901c98 | 213 | int skip_session = 0; |
9ecb8875 AKG |
214 | |
215 | /* | |
216 | * We poll because DSPS IP's won't expose several OTG-critical | |
217 | * status change events (from the transceiver) otherwise. | |
218 | */ | |
219 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
220 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
42c0bf1c | 221 | usb_otg_state_string(musb->xceiv->state)); |
9ecb8875 AKG |
222 | |
223 | spin_lock_irqsave(&musb->lock, flags); | |
224 | switch (musb->xceiv->state) { | |
225 | case OTG_STATE_A_WAIT_BCON: | |
0f901c98 SAS |
226 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); |
227 | skip_session = 1; | |
228 | /* fall */ | |
9ecb8875 | 229 | |
0f901c98 SAS |
230 | case OTG_STATE_A_IDLE: |
231 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
232 | if (devctl & MUSB_DEVCTL_BDEVICE) { |
233 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
234 | MUSB_DEV_MODE(musb); | |
235 | } else { | |
236 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
237 | MUSB_HST_MODE(musb); | |
238 | } | |
0f901c98 SAS |
239 | if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session) |
240 | dsps_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); | |
241 | mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); | |
9ecb8875 AKG |
242 | break; |
243 | case OTG_STATE_A_WAIT_VFALL: | |
244 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
245 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
246 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
247 | break; | |
9ecb8875 AKG |
248 | default: |
249 | break; | |
250 | } | |
251 | spin_unlock_irqrestore(&musb->lock, flags); | |
252 | } | |
253 | ||
9ecb8875 AKG |
254 | static irqreturn_t dsps_interrupt(int irq, void *hci) |
255 | { | |
256 | struct musb *musb = hci; | |
257 | void __iomem *reg_base = musb->ctrl_base; | |
258 | struct device *dev = musb->controller; | |
db4a9320 | 259 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
260 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
261 | unsigned long flags; | |
262 | irqreturn_t ret = IRQ_NONE; | |
263 | u32 epintr, usbintr; | |
264 | ||
265 | spin_lock_irqsave(&musb->lock, flags); | |
266 | ||
267 | /* Get endpoint interrupts */ | |
268 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
269 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
270 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
271 | ||
272 | if (epintr) | |
273 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
274 | ||
275 | /* Get usb core interrupts */ | |
276 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
277 | if (!usbintr && !epintr) | |
9be73bae | 278 | goto out; |
9ecb8875 AKG |
279 | |
280 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
281 | if (usbintr) | |
282 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
283 | ||
284 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
285 | usbintr, epintr); | |
286 | /* | |
287 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
288 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
289 | * switch appropriately between halves of the OTG state machine. | |
290 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
291 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
292 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
293 | */ | |
96449f09 | 294 | if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) |
984e833c | 295 | pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); |
9ecb8875 AKG |
296 | |
297 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
298 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
299 | void __iomem *mregs = musb->mregs; | |
300 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
301 | int err; | |
302 | ||
032ec49f | 303 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
304 | if (err) { |
305 | /* | |
306 | * The Mentor core doesn't debounce VBUS as needed | |
307 | * to cope with device connect current spikes. This | |
308 | * means it's not uncommon for bus-powered devices | |
309 | * to get VBUS errors during enumeration. | |
310 | * | |
311 | * This is a workaround, but newer RTL from Mentor | |
312 | * seems to allow a better one: "re"-starting sessions | |
313 | * without waiting for VBUS to stop registering in | |
314 | * devctl. | |
315 | */ | |
316 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
317 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
97238b35 | 318 | mod_timer(&glue->timer, |
9ecb8875 AKG |
319 | jiffies + wrp->poll_seconds * HZ); |
320 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 321 | } else if (drvvbus) { |
9ecb8875 AKG |
322 | MUSB_HST_MODE(musb); |
323 | musb->xceiv->otg->default_a = 1; | |
324 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
97238b35 | 325 | del_timer(&glue->timer); |
9ecb8875 AKG |
326 | } else { |
327 | musb->is_active = 0; | |
328 | MUSB_DEV_MODE(musb); | |
329 | musb->xceiv->otg->default_a = 0; | |
330 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
331 | } | |
332 | ||
333 | /* NOTE: this must complete power-on within 100 ms. */ | |
334 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
335 | drvvbus ? "on" : "off", | |
42c0bf1c | 336 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 AKG |
337 | err ? " ERROR" : "", |
338 | devctl); | |
339 | ret = IRQ_HANDLED; | |
340 | } | |
341 | ||
342 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
343 | ret |= musb_interrupt(musb); | |
344 | ||
9ecb8875 | 345 | /* Poll for ID change */ |
032ec49f | 346 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
97238b35 | 347 | mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); |
9be73bae | 348 | out: |
9ecb8875 AKG |
349 | spin_unlock_irqrestore(&musb->lock, flags); |
350 | ||
351 | return ret; | |
352 | } | |
353 | ||
354 | static int dsps_musb_init(struct musb *musb) | |
355 | { | |
356 | struct device *dev = musb->controller; | |
db4a9320 | 357 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
97238b35 | 358 | struct platform_device *parent = to_platform_device(dev->parent); |
9ecb8875 | 359 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
97238b35 SAS |
360 | void __iomem *reg_base; |
361 | struct resource *r; | |
9ecb8875 | 362 | u32 rev, val; |
9ecb8875 | 363 | |
97238b35 SAS |
364 | r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control"); |
365 | if (!r) | |
366 | return -EINVAL; | |
367 | ||
368 | reg_base = devm_ioremap_resource(dev, r); | |
51ef74f6 JL |
369 | if (IS_ERR(reg_base)) |
370 | return PTR_ERR(reg_base); | |
97238b35 | 371 | musb->ctrl_base = reg_base; |
9ecb8875 | 372 | |
d7554226 | 373 | /* NOP driver needs change if supporting dual instance */ |
97238b35 SAS |
374 | musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0); |
375 | if (IS_ERR(musb->xceiv)) | |
376 | return PTR_ERR(musb->xceiv); | |
9ecb8875 AKG |
377 | |
378 | /* Returns zero if e.g. not clocked */ | |
379 | rev = dsps_readl(reg_base, wrp->revision); | |
97238b35 SAS |
380 | if (!rev) |
381 | return -ENODEV; | |
9ecb8875 | 382 | |
7557a57f | 383 | usb_phy_init(musb->xceiv); |
97238b35 | 384 | setup_timer(&glue->timer, otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
385 | |
386 | /* Reset the musb */ | |
387 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
388 | ||
9ecb8875 AKG |
389 | musb->isr = dsps_interrupt; |
390 | ||
391 | /* reset the otgdisable bit, needed for host mode to work */ | |
392 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
393 | val &= ~(1 << wrp->otg_disable); | |
394 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
395 | ||
9ecb8875 | 396 | return 0; |
9ecb8875 AKG |
397 | } |
398 | ||
399 | static int dsps_musb_exit(struct musb *musb) | |
400 | { | |
401 | struct device *dev = musb->controller; | |
db4a9320 | 402 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 | 403 | |
97238b35 | 404 | del_timer_sync(&glue->timer); |
9ecb8875 | 405 | |
7557a57f | 406 | usb_phy_shutdown(musb->xceiv); |
9ecb8875 AKG |
407 | return 0; |
408 | } | |
409 | ||
943c1397 FB |
410 | static int dsps_musb_set_mode(struct musb *musb, u8 mode) |
411 | { | |
412 | struct device *dev = musb->controller; | |
413 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
414 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
415 | void __iomem *ctrl_base = musb->ctrl_base; | |
416 | void __iomem *base = musb->mregs; | |
417 | u32 reg; | |
418 | ||
419 | reg = dsps_readl(base, wrp->mode); | |
420 | ||
421 | switch (mode) { | |
422 | case MUSB_HOST: | |
423 | reg &= ~(1 << wrp->iddig); | |
424 | ||
425 | /* | |
426 | * if we're setting mode to host-only or device-only, we're | |
427 | * going to ignore whatever the PHY sends us and just force | |
428 | * ID pin status by SW | |
429 | */ | |
430 | reg |= (1 << wrp->iddig_mux); | |
431 | ||
432 | dsps_writel(base, wrp->mode, reg); | |
433 | dsps_writel(ctrl_base, wrp->phy_utmi, 0x02); | |
434 | break; | |
435 | case MUSB_PERIPHERAL: | |
436 | reg |= (1 << wrp->iddig); | |
437 | ||
438 | /* | |
439 | * if we're setting mode to host-only or device-only, we're | |
440 | * going to ignore whatever the PHY sends us and just force | |
441 | * ID pin status by SW | |
442 | */ | |
443 | reg |= (1 << wrp->iddig_mux); | |
444 | ||
445 | dsps_writel(base, wrp->mode, reg); | |
446 | break; | |
447 | case MUSB_OTG: | |
448 | dsps_writel(base, wrp->phy_utmi, 0x02); | |
449 | break; | |
450 | default: | |
451 | dev_err(glue->dev, "unsupported mode %d\n", mode); | |
452 | return -EINVAL; | |
453 | } | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
9ecb8875 AKG |
458 | static struct musb_platform_ops dsps_ops = { |
459 | .init = dsps_musb_init, | |
460 | .exit = dsps_musb_exit, | |
461 | ||
462 | .enable = dsps_musb_enable, | |
463 | .disable = dsps_musb_disable, | |
464 | ||
465 | .try_idle = dsps_musb_try_idle, | |
943c1397 | 466 | .set_mode = dsps_musb_set_mode, |
9ecb8875 AKG |
467 | }; |
468 | ||
469 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
470 | ||
97238b35 | 471 | static int get_int_prop(struct device_node *dn, const char *s) |
9ecb8875 | 472 | { |
97238b35 SAS |
473 | int ret; |
474 | u32 val; | |
475 | ||
476 | ret = of_property_read_u32(dn, s, &val); | |
477 | if (ret) | |
478 | return 0; | |
479 | return val; | |
480 | } | |
481 | ||
c031a7d4 SAS |
482 | static int get_musb_port_mode(struct device *dev) |
483 | { | |
484 | enum usb_dr_mode mode; | |
485 | ||
486 | mode = of_usb_get_dr_mode(dev->of_node); | |
487 | switch (mode) { | |
488 | case USB_DR_MODE_HOST: | |
489 | return MUSB_PORT_MODE_HOST; | |
490 | ||
491 | case USB_DR_MODE_PERIPHERAL: | |
492 | return MUSB_PORT_MODE_GADGET; | |
493 | ||
494 | case USB_DR_MODE_UNKNOWN: | |
495 | case USB_DR_MODE_OTG: | |
496 | default: | |
497 | return MUSB_PORT_MODE_DUAL_ROLE; | |
2b84f92b | 498 | } |
c031a7d4 SAS |
499 | } |
500 | ||
97238b35 SAS |
501 | static int dsps_create_musb_pdev(struct dsps_glue *glue, |
502 | struct platform_device *parent) | |
503 | { | |
504 | struct musb_hdrc_platform_data pdata; | |
9ecb8875 | 505 | struct resource resources[2]; |
c031a7d4 | 506 | struct resource *res; |
97238b35 SAS |
507 | struct device *dev = &parent->dev; |
508 | struct musb_hdrc_config *config; | |
509 | struct platform_device *musb; | |
510 | struct device_node *dn = parent->dev.of_node; | |
2f771164 | 511 | int ret; |
9ecb8875 | 512 | |
97238b35 | 513 | memset(resources, 0, sizeof(resources)); |
c031a7d4 SAS |
514 | res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc"); |
515 | if (!res) { | |
97238b35 | 516 | dev_err(dev, "failed to get memory.\n"); |
c031a7d4 | 517 | return -EINVAL; |
9ecb8875 | 518 | } |
c031a7d4 | 519 | resources[0] = *res; |
97238b35 | 520 | |
c031a7d4 SAS |
521 | res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc"); |
522 | if (!res) { | |
97238b35 | 523 | dev_err(dev, "failed to get irq.\n"); |
c031a7d4 | 524 | return -EINVAL; |
9ecb8875 | 525 | } |
c031a7d4 | 526 | resources[1] = *res; |
9ecb8875 AKG |
527 | |
528 | /* allocate the child platform device */ | |
2f771164 | 529 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
530 | if (!musb) { |
531 | dev_err(dev, "failed to allocate musb device\n"); | |
97238b35 | 532 | return -ENOMEM; |
9ecb8875 AKG |
533 | } |
534 | ||
535 | musb->dev.parent = dev; | |
536 | musb->dev.dma_mask = &musb_dmamask; | |
537 | musb->dev.coherent_dma_mask = musb_dmamask; | |
c031a7d4 | 538 | musb->dev.of_node = of_node_get(dn); |
9ecb8875 | 539 | |
97238b35 | 540 | glue->musb = musb; |
9ecb8875 | 541 | |
97238b35 SAS |
542 | ret = platform_device_add_resources(musb, resources, |
543 | ARRAY_SIZE(resources)); | |
9ecb8875 AKG |
544 | if (ret) { |
545 | dev_err(dev, "failed to add resources\n"); | |
97238b35 | 546 | goto err; |
9ecb8875 AKG |
547 | } |
548 | ||
97238b35 SAS |
549 | config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL); |
550 | if (!config) { | |
551 | dev_err(dev, "failed to allocate musb hdrc config\n"); | |
552 | ret = -ENOMEM; | |
553 | goto err; | |
65145677 | 554 | } |
97238b35 SAS |
555 | pdata.config = config; |
556 | pdata.platform_ops = &dsps_ops; | |
65145677 | 557 | |
c031a7d4 SAS |
558 | config->num_eps = get_int_prop(dn, "mentor,num-eps"); |
559 | config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); | |
560 | pdata.mode = get_musb_port_mode(dev); | |
561 | /* DT keeps this entry in mA, musb expects it as per USB spec */ | |
562 | pdata.power = get_int_prop(dn, "mentor,power") / 2; | |
563 | config->multipoint = of_property_read_bool(dn, "mentor,multipoint"); | |
65145677 | 564 | |
97238b35 | 565 | ret = platform_device_add_data(musb, &pdata, sizeof(pdata)); |
9ecb8875 AKG |
566 | if (ret) { |
567 | dev_err(dev, "failed to add platform_data\n"); | |
97238b35 | 568 | goto err; |
9ecb8875 AKG |
569 | } |
570 | ||
571 | ret = platform_device_add(musb); | |
572 | if (ret) { | |
573 | dev_err(dev, "failed to register musb device\n"); | |
97238b35 | 574 | goto err; |
9ecb8875 | 575 | } |
9ecb8875 AKG |
576 | return 0; |
577 | ||
97238b35 | 578 | err: |
9ecb8875 | 579 | platform_device_put(musb); |
9ecb8875 AKG |
580 | return ret; |
581 | } | |
582 | ||
41ac7b3a | 583 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 584 | { |
65145677 AKG |
585 | const struct of_device_id *match; |
586 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 | 587 | struct dsps_glue *glue; |
97238b35 | 588 | int ret; |
9ecb8875 | 589 | |
4fc4b274 SAS |
590 | if (!strcmp(pdev->name, "musb-hdrc")) |
591 | return -ENODEV; | |
592 | ||
cc506036 | 593 | match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); |
65145677 AKG |
594 | if (!match) { |
595 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
97238b35 | 596 | return -EINVAL; |
65145677 AKG |
597 | } |
598 | wrp = match->data; | |
9ecb8875 AKG |
599 | |
600 | /* allocate glue */ | |
601 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
602 | if (!glue) { | |
603 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
97238b35 | 604 | return -ENOMEM; |
9ecb8875 AKG |
605 | } |
606 | ||
607 | glue->dev = &pdev->dev; | |
97238b35 | 608 | glue->wrp = wrp; |
9ecb8875 | 609 | |
9ecb8875 | 610 | platform_set_drvdata(pdev, glue); |
9ecb8875 AKG |
611 | pm_runtime_enable(&pdev->dev); |
612 | ||
613 | ret = pm_runtime_get_sync(&pdev->dev); | |
614 | if (ret < 0) { | |
615 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
616 | goto err2; |
617 | } | |
618 | ||
97238b35 SAS |
619 | ret = dsps_create_musb_pdev(glue, pdev); |
620 | if (ret) | |
621 | goto err3; | |
9ecb8875 AKG |
622 | |
623 | return 0; | |
624 | ||
625 | err3: | |
0e38c4ed | 626 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 627 | err2: |
0e38c4ed | 628 | pm_runtime_disable(&pdev->dev); |
9ecb8875 | 629 | kfree(glue); |
9ecb8875 AKG |
630 | return ret; |
631 | } | |
97238b35 | 632 | |
fb4e98ab | 633 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
634 | { |
635 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
636 | ||
97238b35 | 637 | platform_device_unregister(glue->musb); |
9ecb8875 AKG |
638 | |
639 | /* disable usbss clocks */ | |
640 | pm_runtime_put(&pdev->dev); | |
641 | pm_runtime_disable(&pdev->dev); | |
9ecb8875 AKG |
642 | kfree(glue); |
643 | return 0; | |
644 | } | |
645 | ||
fa7b4ca5 | 646 | static const struct dsps_musb_wrapper am33xx_driver_data = { |
9ecb8875 AKG |
647 | .revision = 0x00, |
648 | .control = 0x14, | |
649 | .status = 0x18, | |
9ecb8875 AKG |
650 | .epintr_set = 0x38, |
651 | .epintr_clear = 0x40, | |
652 | .epintr_status = 0x30, | |
653 | .coreintr_set = 0x3c, | |
654 | .coreintr_clear = 0x44, | |
655 | .coreintr_status = 0x34, | |
656 | .phy_utmi = 0xe0, | |
657 | .mode = 0xe8, | |
658 | .reset = 0, | |
659 | .otg_disable = 21, | |
660 | .iddig = 8, | |
943c1397 | 661 | .iddig_mux = 7, |
9ecb8875 AKG |
662 | .usb_shift = 0, |
663 | .usb_mask = 0x1ff, | |
664 | .usb_bitmap = (0x1ff << 0), | |
665 | .drvvbus = 8, | |
666 | .txep_shift = 0, | |
667 | .txep_mask = 0xffff, | |
668 | .txep_bitmap = (0xffff << 0), | |
669 | .rxep_shift = 16, | |
670 | .rxep_mask = 0xfffe, | |
671 | .rxep_bitmap = (0xfffe << 16), | |
9ecb8875 AKG |
672 | .poll_seconds = 2, |
673 | }; | |
674 | ||
2f82686e | 675 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 | 676 | { .compatible = "ti,musb-am33xx", |
fa7b4ca5 | 677 | .data = (void *) &am33xx_driver_data, }, |
9ecb8875 AKG |
678 | { }, |
679 | }; | |
680 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
681 | ||
682 | static struct platform_driver dsps_usbss_driver = { | |
683 | .probe = dsps_probe, | |
7690417d | 684 | .remove = dsps_remove, |
9ecb8875 AKG |
685 | .driver = { |
686 | .name = "musb-dsps", | |
b432cb83 | 687 | .of_match_table = musb_dsps_of_match, |
9ecb8875 | 688 | }, |
9ecb8875 AKG |
689 | }; |
690 | ||
691 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
692 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
693 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
694 | MODULE_LICENSE("GPL v2"); | |
695 | ||
97238b35 | 696 | module_platform_driver(dsps_usbss_driver); |