Commit | Line | Data |
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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 | ||
124 | /** | |
125 | * dsps_musb_enable - enable interrupts | |
126 | */ | |
127 | static void dsps_musb_enable(struct musb *musb) | |
128 | { | |
129 | struct device *dev = musb->controller; | |
130 | struct platform_device *pdev = to_platform_device(dev->parent); | |
131 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
132 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
133 | void __iomem *reg_base = musb->ctrl_base; | |
134 | u32 epmask, coremask; | |
135 | ||
136 | /* Workaround: setup IRQs through both register sets. */ | |
137 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
138 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
139 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
140 | ||
141 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
142 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
143 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
144 | dsps_writel(reg_base, wrp->coreintr_set, |
145 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
9ecb8875 AKG |
146 | } |
147 | ||
148 | /** | |
149 | * dsps_musb_disable - disable HDRC and flush interrupts | |
150 | */ | |
151 | static void dsps_musb_disable(struct musb *musb) | |
152 | { | |
153 | struct device *dev = musb->controller; | |
154 | struct platform_device *pdev = to_platform_device(dev->parent); | |
155 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
156 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
157 | void __iomem *reg_base = musb->ctrl_base; | |
158 | ||
159 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
160 | dsps_writel(reg_base, wrp->epintr_clear, | |
161 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
162 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
9ecb8875 AKG |
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 | 170 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
171 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
172 | u8 devctl; | |
173 | unsigned long flags; | |
174 | ||
175 | /* | |
176 | * We poll because DSPS IP's won't expose several OTG-critical | |
177 | * status change events (from the transceiver) otherwise. | |
178 | */ | |
179 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
180 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
42c0bf1c | 181 | usb_otg_state_string(musb->xceiv->state)); |
9ecb8875 AKG |
182 | |
183 | spin_lock_irqsave(&musb->lock, flags); | |
184 | switch (musb->xceiv->state) { | |
185 | case OTG_STATE_A_WAIT_BCON: | |
186 | devctl &= ~MUSB_DEVCTL_SESSION; | |
187 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
188 | ||
189 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); | |
190 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
191 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
192 | MUSB_DEV_MODE(musb); | |
193 | } else { | |
194 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
195 | MUSB_HST_MODE(musb); | |
196 | } | |
197 | break; | |
198 | case OTG_STATE_A_WAIT_VFALL: | |
199 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
200 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
201 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
202 | break; | |
203 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
204 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
205 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
97238b35 | 206 | mod_timer(&glue->timer, |
9ecb8875 AKG |
207 | jiffies + wrp->poll_seconds * HZ); |
208 | else | |
209 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
210 | break; | |
211 | default: | |
212 | break; | |
213 | } | |
214 | spin_unlock_irqrestore(&musb->lock, flags); | |
215 | } | |
216 | ||
217 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) | |
218 | { | |
219 | struct device *dev = musb->controller; | |
db4a9320 | 220 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
221 | |
222 | if (timeout == 0) | |
223 | timeout = jiffies + msecs_to_jiffies(3); | |
224 | ||
225 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
226 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
227 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
228 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
42c0bf1c | 229 | usb_otg_state_string(musb->xceiv->state)); |
97238b35 SAS |
230 | del_timer(&glue->timer); |
231 | glue->last_timer = jiffies; | |
9ecb8875 AKG |
232 | return; |
233 | } | |
781f1798 SAS |
234 | if (musb->port_mode == MUSB_PORT_MODE_HOST) |
235 | return; | |
9ecb8875 | 236 | |
97238b35 SAS |
237 | if (time_after(glue->last_timer, timeout) && |
238 | timer_pending(&glue->timer)) { | |
9ecb8875 AKG |
239 | dev_dbg(musb->controller, |
240 | "Longer idle timer already pending, ignoring...\n"); | |
241 | return; | |
242 | } | |
97238b35 | 243 | glue->last_timer = timeout; |
9ecb8875 AKG |
244 | |
245 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
42c0bf1c | 246 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 | 247 | jiffies_to_msecs(timeout - jiffies)); |
97238b35 | 248 | mod_timer(&glue->timer, 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 | 256 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
257 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
258 | unsigned long flags; | |
259 | irqreturn_t ret = IRQ_NONE; | |
260 | u32 epintr, usbintr; | |
261 | ||
262 | spin_lock_irqsave(&musb->lock, flags); | |
263 | ||
264 | /* Get endpoint interrupts */ | |
265 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
266 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
267 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
268 | ||
269 | if (epintr) | |
270 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
271 | ||
272 | /* Get usb core interrupts */ | |
273 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
274 | if (!usbintr && !epintr) | |
9be73bae | 275 | goto out; |
9ecb8875 AKG |
276 | |
277 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
278 | if (usbintr) | |
279 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
280 | ||
281 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
282 | usbintr, epintr); | |
283 | /* | |
284 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
285 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
286 | * switch appropriately between halves of the OTG state machine. | |
287 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
288 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
289 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
290 | */ | |
96449f09 | 291 | if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) |
984e833c | 292 | pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); |
9ecb8875 AKG |
293 | |
294 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
295 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
296 | void __iomem *mregs = musb->mregs; | |
297 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
298 | int err; | |
299 | ||
032ec49f | 300 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
301 | if (err) { |
302 | /* | |
303 | * The Mentor core doesn't debounce VBUS as needed | |
304 | * to cope with device connect current spikes. This | |
305 | * means it's not uncommon for bus-powered devices | |
306 | * to get VBUS errors during enumeration. | |
307 | * | |
308 | * This is a workaround, but newer RTL from Mentor | |
309 | * seems to allow a better one: "re"-starting sessions | |
310 | * without waiting for VBUS to stop registering in | |
311 | * devctl. | |
312 | */ | |
313 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
314 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
97238b35 | 315 | mod_timer(&glue->timer, |
9ecb8875 AKG |
316 | jiffies + wrp->poll_seconds * HZ); |
317 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 318 | } else if (drvvbus) { |
9ecb8875 AKG |
319 | MUSB_HST_MODE(musb); |
320 | musb->xceiv->otg->default_a = 1; | |
321 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
97238b35 | 322 | del_timer(&glue->timer); |
9ecb8875 AKG |
323 | } else { |
324 | musb->is_active = 0; | |
325 | MUSB_DEV_MODE(musb); | |
326 | musb->xceiv->otg->default_a = 0; | |
327 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
328 | } | |
329 | ||
330 | /* NOTE: this must complete power-on within 100 ms. */ | |
331 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
332 | drvvbus ? "on" : "off", | |
42c0bf1c | 333 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 AKG |
334 | err ? " ERROR" : "", |
335 | devctl); | |
336 | ret = IRQ_HANDLED; | |
337 | } | |
338 | ||
339 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
340 | ret |= musb_interrupt(musb); | |
341 | ||
9ecb8875 | 342 | /* Poll for ID change */ |
032ec49f | 343 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
97238b35 | 344 | mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); |
9be73bae | 345 | out: |
9ecb8875 AKG |
346 | spin_unlock_irqrestore(&musb->lock, flags); |
347 | ||
348 | return ret; | |
349 | } | |
350 | ||
351 | static int dsps_musb_init(struct musb *musb) | |
352 | { | |
353 | struct device *dev = musb->controller; | |
db4a9320 | 354 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
97238b35 | 355 | struct platform_device *parent = to_platform_device(dev->parent); |
9ecb8875 | 356 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
97238b35 SAS |
357 | void __iomem *reg_base; |
358 | struct resource *r; | |
9ecb8875 | 359 | u32 rev, val; |
9ecb8875 | 360 | |
97238b35 SAS |
361 | r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control"); |
362 | if (!r) | |
363 | return -EINVAL; | |
364 | ||
365 | reg_base = devm_ioremap_resource(dev, r); | |
51ef74f6 JL |
366 | if (IS_ERR(reg_base)) |
367 | return PTR_ERR(reg_base); | |
97238b35 | 368 | musb->ctrl_base = reg_base; |
9ecb8875 | 369 | |
d7554226 | 370 | /* NOP driver needs change if supporting dual instance */ |
97238b35 SAS |
371 | musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0); |
372 | if (IS_ERR(musb->xceiv)) | |
373 | return PTR_ERR(musb->xceiv); | |
9ecb8875 AKG |
374 | |
375 | /* Returns zero if e.g. not clocked */ | |
376 | rev = dsps_readl(reg_base, wrp->revision); | |
97238b35 SAS |
377 | if (!rev) |
378 | return -ENODEV; | |
9ecb8875 | 379 | |
7557a57f | 380 | usb_phy_init(musb->xceiv); |
97238b35 | 381 | setup_timer(&glue->timer, otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
382 | |
383 | /* Reset the musb */ | |
384 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
385 | ||
9ecb8875 AKG |
386 | musb->isr = dsps_interrupt; |
387 | ||
388 | /* reset the otgdisable bit, needed for host mode to work */ | |
389 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
390 | val &= ~(1 << wrp->otg_disable); | |
391 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
392 | ||
9ecb8875 | 393 | return 0; |
9ecb8875 AKG |
394 | } |
395 | ||
396 | static int dsps_musb_exit(struct musb *musb) | |
397 | { | |
398 | struct device *dev = musb->controller; | |
db4a9320 | 399 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 | 400 | |
97238b35 | 401 | del_timer_sync(&glue->timer); |
9ecb8875 | 402 | |
7557a57f | 403 | usb_phy_shutdown(musb->xceiv); |
9ecb8875 AKG |
404 | return 0; |
405 | } | |
406 | ||
407 | static struct musb_platform_ops dsps_ops = { | |
408 | .init = dsps_musb_init, | |
409 | .exit = dsps_musb_exit, | |
410 | ||
411 | .enable = dsps_musb_enable, | |
412 | .disable = dsps_musb_disable, | |
413 | ||
414 | .try_idle = dsps_musb_try_idle, | |
415 | }; | |
416 | ||
417 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
418 | ||
97238b35 | 419 | static int get_int_prop(struct device_node *dn, const char *s) |
9ecb8875 | 420 | { |
97238b35 SAS |
421 | int ret; |
422 | u32 val; | |
423 | ||
424 | ret = of_property_read_u32(dn, s, &val); | |
425 | if (ret) | |
426 | return 0; | |
427 | return val; | |
428 | } | |
429 | ||
c031a7d4 SAS |
430 | static int get_musb_port_mode(struct device *dev) |
431 | { | |
432 | enum usb_dr_mode mode; | |
433 | ||
434 | mode = of_usb_get_dr_mode(dev->of_node); | |
435 | switch (mode) { | |
436 | case USB_DR_MODE_HOST: | |
437 | return MUSB_PORT_MODE_HOST; | |
438 | ||
439 | case USB_DR_MODE_PERIPHERAL: | |
440 | return MUSB_PORT_MODE_GADGET; | |
441 | ||
442 | case USB_DR_MODE_UNKNOWN: | |
443 | case USB_DR_MODE_OTG: | |
444 | default: | |
445 | return MUSB_PORT_MODE_DUAL_ROLE; | |
446 | }; | |
447 | } | |
448 | ||
97238b35 SAS |
449 | static int dsps_create_musb_pdev(struct dsps_glue *glue, |
450 | struct platform_device *parent) | |
451 | { | |
452 | struct musb_hdrc_platform_data pdata; | |
9ecb8875 | 453 | struct resource resources[2]; |
c031a7d4 | 454 | struct resource *res; |
97238b35 SAS |
455 | struct device *dev = &parent->dev; |
456 | struct musb_hdrc_config *config; | |
457 | struct platform_device *musb; | |
458 | struct device_node *dn = parent->dev.of_node; | |
2f771164 | 459 | int ret; |
9ecb8875 | 460 | |
97238b35 | 461 | memset(resources, 0, sizeof(resources)); |
c031a7d4 SAS |
462 | res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc"); |
463 | if (!res) { | |
97238b35 | 464 | dev_err(dev, "failed to get memory.\n"); |
c031a7d4 | 465 | return -EINVAL; |
9ecb8875 | 466 | } |
c031a7d4 | 467 | resources[0] = *res; |
97238b35 | 468 | |
c031a7d4 SAS |
469 | res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc"); |
470 | if (!res) { | |
97238b35 | 471 | dev_err(dev, "failed to get irq.\n"); |
c031a7d4 | 472 | return -EINVAL; |
9ecb8875 | 473 | } |
c031a7d4 | 474 | resources[1] = *res; |
9ecb8875 AKG |
475 | |
476 | /* allocate the child platform device */ | |
2f771164 | 477 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
478 | if (!musb) { |
479 | dev_err(dev, "failed to allocate musb device\n"); | |
97238b35 | 480 | return -ENOMEM; |
9ecb8875 AKG |
481 | } |
482 | ||
483 | musb->dev.parent = dev; | |
484 | musb->dev.dma_mask = &musb_dmamask; | |
485 | musb->dev.coherent_dma_mask = musb_dmamask; | |
c031a7d4 | 486 | musb->dev.of_node = of_node_get(dn); |
9ecb8875 | 487 | |
97238b35 | 488 | glue->musb = musb; |
9ecb8875 | 489 | |
97238b35 SAS |
490 | ret = platform_device_add_resources(musb, resources, |
491 | ARRAY_SIZE(resources)); | |
9ecb8875 AKG |
492 | if (ret) { |
493 | dev_err(dev, "failed to add resources\n"); | |
97238b35 | 494 | goto err; |
9ecb8875 AKG |
495 | } |
496 | ||
97238b35 SAS |
497 | config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL); |
498 | if (!config) { | |
499 | dev_err(dev, "failed to allocate musb hdrc config\n"); | |
500 | ret = -ENOMEM; | |
501 | goto err; | |
65145677 | 502 | } |
97238b35 SAS |
503 | pdata.config = config; |
504 | pdata.platform_ops = &dsps_ops; | |
65145677 | 505 | |
c031a7d4 SAS |
506 | config->num_eps = get_int_prop(dn, "mentor,num-eps"); |
507 | config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); | |
508 | pdata.mode = get_musb_port_mode(dev); | |
509 | /* DT keeps this entry in mA, musb expects it as per USB spec */ | |
510 | pdata.power = get_int_prop(dn, "mentor,power") / 2; | |
511 | config->multipoint = of_property_read_bool(dn, "mentor,multipoint"); | |
65145677 | 512 | |
97238b35 | 513 | ret = platform_device_add_data(musb, &pdata, sizeof(pdata)); |
9ecb8875 AKG |
514 | if (ret) { |
515 | dev_err(dev, "failed to add platform_data\n"); | |
97238b35 | 516 | goto err; |
9ecb8875 AKG |
517 | } |
518 | ||
519 | ret = platform_device_add(musb); | |
520 | if (ret) { | |
521 | dev_err(dev, "failed to register musb device\n"); | |
97238b35 | 522 | goto err; |
9ecb8875 | 523 | } |
9ecb8875 AKG |
524 | return 0; |
525 | ||
97238b35 | 526 | err: |
9ecb8875 | 527 | platform_device_put(musb); |
9ecb8875 AKG |
528 | return ret; |
529 | } | |
530 | ||
41ac7b3a | 531 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 532 | { |
65145677 AKG |
533 | const struct of_device_id *match; |
534 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 | 535 | struct dsps_glue *glue; |
97238b35 | 536 | int ret; |
9ecb8875 | 537 | |
4fc4b274 SAS |
538 | if (!strcmp(pdev->name, "musb-hdrc")) |
539 | return -ENODEV; | |
540 | ||
cc506036 | 541 | match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); |
65145677 AKG |
542 | if (!match) { |
543 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
97238b35 | 544 | return -EINVAL; |
65145677 AKG |
545 | } |
546 | wrp = match->data; | |
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"); | |
97238b35 | 552 | return -ENOMEM; |
9ecb8875 AKG |
553 | } |
554 | ||
555 | glue->dev = &pdev->dev; | |
97238b35 | 556 | glue->wrp = wrp; |
9ecb8875 | 557 | |
9ecb8875 | 558 | platform_set_drvdata(pdev, glue); |
9ecb8875 AKG |
559 | pm_runtime_enable(&pdev->dev); |
560 | ||
561 | ret = pm_runtime_get_sync(&pdev->dev); | |
562 | if (ret < 0) { | |
563 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
564 | goto err2; |
565 | } | |
566 | ||
97238b35 SAS |
567 | ret = dsps_create_musb_pdev(glue, pdev); |
568 | if (ret) | |
569 | goto err3; | |
9ecb8875 AKG |
570 | |
571 | return 0; | |
572 | ||
573 | err3: | |
0e38c4ed | 574 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 575 | err2: |
0e38c4ed | 576 | pm_runtime_disable(&pdev->dev); |
9ecb8875 | 577 | kfree(glue); |
9ecb8875 AKG |
578 | return ret; |
579 | } | |
97238b35 | 580 | |
fb4e98ab | 581 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
582 | { |
583 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
584 | ||
97238b35 | 585 | platform_device_unregister(glue->musb); |
9ecb8875 AKG |
586 | |
587 | /* disable usbss clocks */ | |
588 | pm_runtime_put(&pdev->dev); | |
589 | pm_runtime_disable(&pdev->dev); | |
9ecb8875 AKG |
590 | kfree(glue); |
591 | return 0; | |
592 | } | |
593 | ||
fa7b4ca5 | 594 | static const struct dsps_musb_wrapper am33xx_driver_data = { |
9ecb8875 AKG |
595 | .revision = 0x00, |
596 | .control = 0x14, | |
597 | .status = 0x18, | |
9ecb8875 AKG |
598 | .epintr_set = 0x38, |
599 | .epintr_clear = 0x40, | |
600 | .epintr_status = 0x30, | |
601 | .coreintr_set = 0x3c, | |
602 | .coreintr_clear = 0x44, | |
603 | .coreintr_status = 0x34, | |
604 | .phy_utmi = 0xe0, | |
605 | .mode = 0xe8, | |
606 | .reset = 0, | |
607 | .otg_disable = 21, | |
608 | .iddig = 8, | |
609 | .usb_shift = 0, | |
610 | .usb_mask = 0x1ff, | |
611 | .usb_bitmap = (0x1ff << 0), | |
612 | .drvvbus = 8, | |
613 | .txep_shift = 0, | |
614 | .txep_mask = 0xffff, | |
615 | .txep_bitmap = (0xffff << 0), | |
616 | .rxep_shift = 16, | |
617 | .rxep_mask = 0xfffe, | |
618 | .rxep_bitmap = (0xfffe << 16), | |
9ecb8875 AKG |
619 | .poll_seconds = 2, |
620 | }; | |
621 | ||
2f82686e | 622 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 | 623 | { .compatible = "ti,musb-am33xx", |
fa7b4ca5 | 624 | .data = (void *) &am33xx_driver_data, }, |
9ecb8875 AKG |
625 | { }, |
626 | }; | |
627 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
628 | ||
629 | static struct platform_driver dsps_usbss_driver = { | |
630 | .probe = dsps_probe, | |
7690417d | 631 | .remove = dsps_remove, |
9ecb8875 AKG |
632 | .driver = { |
633 | .name = "musb-dsps", | |
65145677 | 634 | .of_match_table = of_match_ptr(musb_dsps_of_match), |
9ecb8875 | 635 | }, |
9ecb8875 AKG |
636 | }; |
637 | ||
638 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
639 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
640 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
641 | MODULE_LICENSE("GPL v2"); | |
642 | ||
97238b35 | 643 | module_platform_driver(dsps_usbss_driver); |