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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 | ||
9ecb8875 | 32 | #include <linux/io.h> |
ded017ee | 33 | #include <linux/err.h> |
9ecb8875 AKG |
34 | #include <linux/platform_device.h> |
35 | #include <linux/dma-mapping.h> | |
36 | #include <linux/pm_runtime.h> | |
37 | #include <linux/module.h> | |
d7078df6 | 38 | #include <linux/usb/usb_phy_generic.h> |
e8c4a7ac | 39 | #include <linux/platform_data/usb-omap.h> |
0f53e481 | 40 | #include <linux/sizes.h> |
9ecb8875 AKG |
41 | |
42 | #include <linux/of.h> | |
43 | #include <linux/of_device.h> | |
44 | #include <linux/of_address.h> | |
97238b35 | 45 | #include <linux/of_irq.h> |
c031a7d4 | 46 | #include <linux/usb/of.h> |
9ecb8875 | 47 | |
40f099e3 MP |
48 | #include <linux/debugfs.h> |
49 | ||
9ecb8875 AKG |
50 | #include "musb_core.h" |
51 | ||
65145677 | 52 | static const struct of_device_id musb_dsps_of_match[]; |
65145677 | 53 | |
9ecb8875 AKG |
54 | /** |
55 | * DSPS musb wrapper register offset. | |
56 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS | |
57 | * musb ips. | |
58 | */ | |
59 | struct dsps_musb_wrapper { | |
60 | u16 revision; | |
61 | u16 control; | |
62 | u16 status; | |
9ecb8875 AKG |
63 | u16 epintr_set; |
64 | u16 epintr_clear; | |
65 | u16 epintr_status; | |
66 | u16 coreintr_set; | |
67 | u16 coreintr_clear; | |
68 | u16 coreintr_status; | |
69 | u16 phy_utmi; | |
70 | u16 mode; | |
b991f9b7 DM |
71 | u16 tx_mode; |
72 | u16 rx_mode; | |
9ecb8875 AKG |
73 | |
74 | /* bit positions for control */ | |
75 | unsigned reset:5; | |
76 | ||
77 | /* bit positions for interrupt */ | |
78 | unsigned usb_shift:5; | |
79 | u32 usb_mask; | |
80 | u32 usb_bitmap; | |
81 | unsigned drvvbus:5; | |
82 | ||
83 | unsigned txep_shift:5; | |
84 | u32 txep_mask; | |
85 | u32 txep_bitmap; | |
86 | ||
87 | unsigned rxep_shift:5; | |
88 | u32 rxep_mask; | |
89 | u32 rxep_bitmap; | |
90 | ||
91 | /* bit positions for phy_utmi */ | |
92 | unsigned otg_disable:5; | |
93 | ||
94 | /* bit positions for mode */ | |
95 | unsigned iddig:5; | |
943c1397 | 96 | unsigned iddig_mux:5; |
9ecb8875 | 97 | /* miscellaneous stuff */ |
9e204d88 | 98 | unsigned poll_timeout; |
9ecb8875 AKG |
99 | }; |
100 | ||
869c5978 DM |
101 | /* |
102 | * register shadow for suspend | |
103 | */ | |
104 | struct dsps_context { | |
105 | u32 control; | |
106 | u32 epintr; | |
107 | u32 coreintr; | |
108 | u32 phy_utmi; | |
109 | u32 mode; | |
110 | u32 tx_mode; | |
111 | u32 rx_mode; | |
112 | }; | |
113 | ||
9ecb8875 AKG |
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 */ | |
371254ce | 123 | bool sw_babble_enabled; |
869c5978 DM |
124 | |
125 | struct dsps_context context; | |
40f099e3 MP |
126 | struct debugfs_regset32 regset; |
127 | struct dentry *dbgfs_root; | |
128 | }; | |
129 | ||
130 | static const struct debugfs_reg32 dsps_musb_regs[] = { | |
131 | { "revision", 0x00 }, | |
132 | { "control", 0x14 }, | |
133 | { "status", 0x18 }, | |
134 | { "eoi", 0x24 }, | |
135 | { "intr0_stat", 0x30 }, | |
136 | { "intr1_stat", 0x34 }, | |
137 | { "intr0_set", 0x38 }, | |
138 | { "intr1_set", 0x3c }, | |
139 | { "txmode", 0x70 }, | |
140 | { "rxmode", 0x74 }, | |
141 | { "autoreq", 0xd0 }, | |
142 | { "srpfixtime", 0xd4 }, | |
143 | { "tdown", 0xd8 }, | |
144 | { "phy_utmi", 0xe0 }, | |
145 | { "mode", 0xe8 }, | |
9ecb8875 AKG |
146 | }; |
147 | ||
148 | /** | |
149 | * dsps_musb_enable - enable interrupts | |
150 | */ | |
151 | static void dsps_musb_enable(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 | u32 epmask, coremask; | |
159 | ||
160 | /* Workaround: setup IRQs through both register sets. */ | |
161 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
162 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
163 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
164 | ||
086b2882 BL |
165 | musb_writel(reg_base, wrp->epintr_set, epmask); |
166 | musb_writel(reg_base, wrp->coreintr_set, coremask); | |
b8239dcc BL |
167 | /* start polling for ID change in dual-role idle mode */ |
168 | if (musb->xceiv->otg->state == OTG_STATE_B_IDLE && | |
169 | musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) | |
170 | mod_timer(&glue->timer, jiffies + | |
171 | msecs_to_jiffies(wrp->poll_timeout)); | |
9ecb8875 AKG |
172 | } |
173 | ||
174 | /** | |
175 | * dsps_musb_disable - disable HDRC and flush interrupts | |
176 | */ | |
177 | static void dsps_musb_disable(struct musb *musb) | |
178 | { | |
179 | struct device *dev = musb->controller; | |
180 | struct platform_device *pdev = to_platform_device(dev->parent); | |
181 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
182 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
183 | void __iomem *reg_base = musb->ctrl_base; | |
184 | ||
086b2882 BL |
185 | musb_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); |
186 | musb_writel(reg_base, wrp->epintr_clear, | |
9ecb8875 | 187 | wrp->txep_bitmap | wrp->rxep_bitmap); |
ea2f35c0 | 188 | del_timer_sync(&glue->timer); |
086b2882 | 189 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
9ecb8875 AKG |
190 | } |
191 | ||
ea2f35c0 TL |
192 | /* Caller must take musb->lock */ |
193 | static int dsps_check_status(struct musb *musb, void *unused) | |
9ecb8875 | 194 | { |
9ecb8875 AKG |
195 | void __iomem *mregs = musb->mregs; |
196 | struct device *dev = musb->controller; | |
db4a9320 | 197 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
198 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
199 | u8 devctl; | |
0f901c98 | 200 | int skip_session = 0; |
9ecb8875 AKG |
201 | |
202 | /* | |
203 | * We poll because DSPS IP's won't expose several OTG-critical | |
204 | * status change events (from the transceiver) otherwise. | |
205 | */ | |
086b2882 | 206 | devctl = musb_readb(mregs, MUSB_DEVCTL); |
9ecb8875 | 207 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, |
e47d9254 | 208 | usb_otg_state_string(musb->xceiv->otg->state)); |
9ecb8875 | 209 | |
e47d9254 | 210 | switch (musb->xceiv->otg->state) { |
2f3fd2c5 TL |
211 | case OTG_STATE_A_WAIT_VRISE: |
212 | mod_timer(&glue->timer, jiffies + | |
213 | msecs_to_jiffies(wrp->poll_timeout)); | |
214 | break; | |
9ecb8875 | 215 | case OTG_STATE_A_WAIT_BCON: |
086b2882 | 216 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); |
0f901c98 SAS |
217 | skip_session = 1; |
218 | /* fall */ | |
9ecb8875 | 219 | |
0f901c98 SAS |
220 | case OTG_STATE_A_IDLE: |
221 | case OTG_STATE_B_IDLE: | |
9ecb8875 | 222 | if (devctl & MUSB_DEVCTL_BDEVICE) { |
e47d9254 | 223 | musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
9ecb8875 AKG |
224 | MUSB_DEV_MODE(musb); |
225 | } else { | |
e47d9254 | 226 | musb->xceiv->otg->state = OTG_STATE_A_IDLE; |
9ecb8875 AKG |
227 | MUSB_HST_MODE(musb); |
228 | } | |
0f901c98 | 229 | if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session) |
086b2882 | 230 | musb_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); |
9e204d88 FB |
231 | mod_timer(&glue->timer, jiffies + |
232 | msecs_to_jiffies(wrp->poll_timeout)); | |
9ecb8875 AKG |
233 | break; |
234 | case OTG_STATE_A_WAIT_VFALL: | |
e47d9254 | 235 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; |
086b2882 | 236 | musb_writel(musb->ctrl_base, wrp->coreintr_set, |
9ecb8875 AKG |
237 | MUSB_INTR_VBUSERROR << wrp->usb_shift); |
238 | break; | |
9ecb8875 AKG |
239 | default: |
240 | break; | |
241 | } | |
65b3f50e | 242 | |
ea2f35c0 TL |
243 | return 0; |
244 | } | |
245 | ||
246 | static void otg_timer(unsigned long _musb) | |
247 | { | |
248 | struct musb *musb = (void *)_musb; | |
249 | struct device *dev = musb->controller; | |
250 | unsigned long flags; | |
251 | int err; | |
252 | ||
253 | err = pm_runtime_get(dev); | |
254 | if ((err != -EINPROGRESS) && err < 0) { | |
255 | dev_err(dev, "Poll could not pm_runtime_get: %i\n", err); | |
256 | pm_runtime_put_noidle(dev); | |
257 | ||
258 | return; | |
259 | } | |
260 | ||
261 | spin_lock_irqsave(&musb->lock, flags); | |
262 | err = musb_queue_resume_work(musb, dsps_check_status, NULL); | |
263 | if (err < 0) | |
264 | dev_err(dev, "%s resume work: %i\n", __func__, err); | |
265 | spin_unlock_irqrestore(&musb->lock, flags); | |
65b3f50e TL |
266 | pm_runtime_mark_last_busy(dev); |
267 | pm_runtime_put_autosuspend(dev); | |
9ecb8875 AKG |
268 | } |
269 | ||
9ecb8875 AKG |
270 | static irqreturn_t dsps_interrupt(int irq, void *hci) |
271 | { | |
272 | struct musb *musb = hci; | |
273 | void __iomem *reg_base = musb->ctrl_base; | |
274 | struct device *dev = musb->controller; | |
db4a9320 | 275 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 AKG |
276 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
277 | unsigned long flags; | |
278 | irqreturn_t ret = IRQ_NONE; | |
279 | u32 epintr, usbintr; | |
280 | ||
281 | spin_lock_irqsave(&musb->lock, flags); | |
282 | ||
283 | /* Get endpoint interrupts */ | |
086b2882 | 284 | epintr = musb_readl(reg_base, wrp->epintr_status); |
9ecb8875 AKG |
285 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; |
286 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
287 | ||
288 | if (epintr) | |
086b2882 | 289 | musb_writel(reg_base, wrp->epintr_status, epintr); |
9ecb8875 AKG |
290 | |
291 | /* Get usb core interrupts */ | |
086b2882 | 292 | usbintr = musb_readl(reg_base, wrp->coreintr_status); |
9ecb8875 | 293 | if (!usbintr && !epintr) |
9be73bae | 294 | goto out; |
9ecb8875 AKG |
295 | |
296 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
297 | if (usbintr) | |
086b2882 | 298 | musb_writel(reg_base, wrp->coreintr_status, usbintr); |
9ecb8875 AKG |
299 | |
300 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
301 | usbintr, epintr); | |
1d57de30 | 302 | |
9ecb8875 | 303 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { |
086b2882 | 304 | int drvvbus = musb_readl(reg_base, wrp->status); |
9ecb8875 | 305 | void __iomem *mregs = musb->mregs; |
086b2882 | 306 | u8 devctl = musb_readb(mregs, MUSB_DEVCTL); |
9ecb8875 AKG |
307 | int err; |
308 | ||
032ec49f | 309 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
310 | if (err) { |
311 | /* | |
312 | * The Mentor core doesn't debounce VBUS as needed | |
313 | * to cope with device connect current spikes. This | |
314 | * means it's not uncommon for bus-powered devices | |
315 | * to get VBUS errors during enumeration. | |
316 | * | |
317 | * This is a workaround, but newer RTL from Mentor | |
318 | * seems to allow a better one: "re"-starting sessions | |
319 | * without waiting for VBUS to stop registering in | |
320 | * devctl. | |
321 | */ | |
322 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
e47d9254 | 323 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL; |
9e204d88 FB |
324 | mod_timer(&glue->timer, jiffies + |
325 | msecs_to_jiffies(wrp->poll_timeout)); | |
9ecb8875 | 326 | WARNING("VBUS error workaround (delay coming)\n"); |
032ec49f | 327 | } else if (drvvbus) { |
9ecb8875 AKG |
328 | MUSB_HST_MODE(musb); |
329 | musb->xceiv->otg->default_a = 1; | |
e47d9254 | 330 | musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE; |
2f3fd2c5 TL |
331 | mod_timer(&glue->timer, jiffies + |
332 | msecs_to_jiffies(wrp->poll_timeout)); | |
9ecb8875 AKG |
333 | } else { |
334 | musb->is_active = 0; | |
335 | MUSB_DEV_MODE(musb); | |
336 | musb->xceiv->otg->default_a = 0; | |
e47d9254 | 337 | musb->xceiv->otg->state = OTG_STATE_B_IDLE; |
9ecb8875 AKG |
338 | } |
339 | ||
340 | /* NOTE: this must complete power-on within 100 ms. */ | |
341 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
342 | drvvbus ? "on" : "off", | |
e47d9254 | 343 | usb_otg_state_string(musb->xceiv->otg->state), |
9ecb8875 AKG |
344 | err ? " ERROR" : "", |
345 | devctl); | |
346 | ret = IRQ_HANDLED; | |
347 | } | |
348 | ||
349 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
350 | ret |= musb_interrupt(musb); | |
351 | ||
2f3fd2c5 TL |
352 | /* Poll for ID change and connect */ |
353 | switch (musb->xceiv->otg->state) { | |
354 | case OTG_STATE_B_IDLE: | |
355 | case OTG_STATE_A_WAIT_BCON: | |
9e204d88 FB |
356 | mod_timer(&glue->timer, jiffies + |
357 | msecs_to_jiffies(wrp->poll_timeout)); | |
2f3fd2c5 TL |
358 | break; |
359 | default: | |
360 | break; | |
361 | } | |
362 | ||
9be73bae | 363 | out: |
9ecb8875 AKG |
364 | spin_unlock_irqrestore(&musb->lock, flags); |
365 | ||
366 | return ret; | |
367 | } | |
368 | ||
40f099e3 MP |
369 | static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue) |
370 | { | |
371 | struct dentry *root; | |
372 | struct dentry *file; | |
373 | char buf[128]; | |
374 | ||
375 | sprintf(buf, "%s.dsps", dev_name(musb->controller)); | |
376 | root = debugfs_create_dir(buf, NULL); | |
377 | if (!root) | |
378 | return -ENOMEM; | |
379 | glue->dbgfs_root = root; | |
380 | ||
381 | glue->regset.regs = dsps_musb_regs; | |
382 | glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs); | |
383 | glue->regset.base = musb->ctrl_base; | |
384 | ||
385 | file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset); | |
386 | if (!file) { | |
387 | debugfs_remove_recursive(root); | |
388 | return -ENOMEM; | |
389 | } | |
390 | return 0; | |
391 | } | |
392 | ||
9ecb8875 AKG |
393 | static int dsps_musb_init(struct musb *musb) |
394 | { | |
395 | struct device *dev = musb->controller; | |
db4a9320 | 396 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
97238b35 | 397 | struct platform_device *parent = to_platform_device(dev->parent); |
9ecb8875 | 398 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
97238b35 SAS |
399 | void __iomem *reg_base; |
400 | struct resource *r; | |
9ecb8875 | 401 | u32 rev, val; |
40f099e3 | 402 | int ret; |
9ecb8875 | 403 | |
97238b35 | 404 | r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control"); |
97238b35 | 405 | reg_base = devm_ioremap_resource(dev, r); |
51ef74f6 JL |
406 | if (IS_ERR(reg_base)) |
407 | return PTR_ERR(reg_base); | |
97238b35 | 408 | musb->ctrl_base = reg_base; |
9ecb8875 | 409 | |
d7554226 | 410 | /* NOP driver needs change if supporting dual instance */ |
983f3cab | 411 | musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0); |
97238b35 SAS |
412 | if (IS_ERR(musb->xceiv)) |
413 | return PTR_ERR(musb->xceiv); | |
9ecb8875 | 414 | |
bb90600d TL |
415 | musb->phy = devm_phy_get(dev->parent, "usb2-phy"); |
416 | ||
9ecb8875 | 417 | /* Returns zero if e.g. not clocked */ |
086b2882 | 418 | rev = musb_readl(reg_base, wrp->revision); |
97238b35 SAS |
419 | if (!rev) |
420 | return -ENODEV; | |
9ecb8875 | 421 | |
7557a57f | 422 | usb_phy_init(musb->xceiv); |
bb90600d TL |
423 | if (IS_ERR(musb->phy)) { |
424 | musb->phy = NULL; | |
425 | } else { | |
426 | ret = phy_init(musb->phy); | |
427 | if (ret < 0) | |
428 | return ret; | |
429 | ret = phy_power_on(musb->phy); | |
430 | if (ret) { | |
431 | phy_exit(musb->phy); | |
432 | return ret; | |
433 | } | |
434 | } | |
435 | ||
97238b35 | 436 | setup_timer(&glue->timer, otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
437 | |
438 | /* Reset the musb */ | |
086b2882 | 439 | musb_writel(reg_base, wrp->control, (1 << wrp->reset)); |
9ecb8875 | 440 | |
9ecb8875 AKG |
441 | musb->isr = dsps_interrupt; |
442 | ||
443 | /* reset the otgdisable bit, needed for host mode to work */ | |
086b2882 | 444 | val = musb_readl(reg_base, wrp->phy_utmi); |
9ecb8875 | 445 | val &= ~(1 << wrp->otg_disable); |
086b2882 | 446 | musb_writel(musb->ctrl_base, wrp->phy_utmi, val); |
9ecb8875 | 447 | |
371254ce GC |
448 | /* |
449 | * Check whether the dsps version has babble control enabled. | |
450 | * In latest silicon revision the babble control logic is enabled. | |
451 | * If MUSB_BABBLE_CTL returns 0x4 then we have the babble control | |
452 | * logic enabled. | |
453 | */ | |
086b2882 | 454 | val = musb_readb(musb->mregs, MUSB_BABBLE_CTL); |
f860f0b1 | 455 | if (val & MUSB_BABBLE_RCV_DISABLE) { |
371254ce GC |
456 | glue->sw_babble_enabled = true; |
457 | val |= MUSB_BABBLE_SW_SESSION_CTRL; | |
086b2882 | 458 | musb_writeb(musb->mregs, MUSB_BABBLE_CTL, val); |
371254ce GC |
459 | } |
460 | ||
2f3fd2c5 TL |
461 | mod_timer(&glue->timer, jiffies + |
462 | msecs_to_jiffies(glue->wrp->poll_timeout)); | |
463 | ||
e94a7369 | 464 | return dsps_musb_dbg_init(musb, glue); |
9ecb8875 AKG |
465 | } |
466 | ||
467 | static int dsps_musb_exit(struct musb *musb) | |
468 | { | |
469 | struct device *dev = musb->controller; | |
db4a9320 | 470 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); |
9ecb8875 | 471 | |
97238b35 | 472 | del_timer_sync(&glue->timer); |
7557a57f | 473 | usb_phy_shutdown(musb->xceiv); |
bb90600d TL |
474 | phy_power_off(musb->phy); |
475 | phy_exit(musb->phy); | |
0fca91b8 DM |
476 | debugfs_remove_recursive(glue->dbgfs_root); |
477 | ||
9ecb8875 AKG |
478 | return 0; |
479 | } | |
480 | ||
943c1397 FB |
481 | static int dsps_musb_set_mode(struct musb *musb, u8 mode) |
482 | { | |
483 | struct device *dev = musb->controller; | |
484 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
485 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
486 | void __iomem *ctrl_base = musb->ctrl_base; | |
943c1397 FB |
487 | u32 reg; |
488 | ||
086b2882 | 489 | reg = musb_readl(ctrl_base, wrp->mode); |
943c1397 FB |
490 | |
491 | switch (mode) { | |
492 | case MUSB_HOST: | |
493 | reg &= ~(1 << wrp->iddig); | |
494 | ||
495 | /* | |
496 | * if we're setting mode to host-only or device-only, we're | |
497 | * going to ignore whatever the PHY sends us and just force | |
498 | * ID pin status by SW | |
499 | */ | |
500 | reg |= (1 << wrp->iddig_mux); | |
501 | ||
086b2882 BL |
502 | musb_writel(ctrl_base, wrp->mode, reg); |
503 | musb_writel(ctrl_base, wrp->phy_utmi, 0x02); | |
943c1397 FB |
504 | break; |
505 | case MUSB_PERIPHERAL: | |
506 | reg |= (1 << wrp->iddig); | |
507 | ||
508 | /* | |
509 | * if we're setting mode to host-only or device-only, we're | |
510 | * going to ignore whatever the PHY sends us and just force | |
511 | * ID pin status by SW | |
512 | */ | |
513 | reg |= (1 << wrp->iddig_mux); | |
514 | ||
086b2882 | 515 | musb_writel(ctrl_base, wrp->mode, reg); |
943c1397 FB |
516 | break; |
517 | case MUSB_OTG: | |
086b2882 | 518 | musb_writel(ctrl_base, wrp->phy_utmi, 0x02); |
943c1397 FB |
519 | break; |
520 | default: | |
521 | dev_err(glue->dev, "unsupported mode %d\n", mode); | |
522 | return -EINVAL; | |
523 | } | |
524 | ||
525 | return 0; | |
526 | } | |
527 | ||
3709ffca | 528 | static bool dsps_sw_babble_control(struct musb *musb) |
371254ce GC |
529 | { |
530 | u8 babble_ctl; | |
531 | bool session_restart = false; | |
532 | ||
086b2882 | 533 | babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL); |
371254ce GC |
534 | dev_dbg(musb->controller, "babble: MUSB_BABBLE_CTL value %x\n", |
535 | babble_ctl); | |
536 | /* | |
537 | * check line monitor flag to check whether babble is | |
538 | * due to noise | |
539 | */ | |
540 | dev_dbg(musb->controller, "STUCK_J is %s\n", | |
541 | babble_ctl & MUSB_BABBLE_STUCK_J ? "set" : "reset"); | |
542 | ||
543 | if (babble_ctl & MUSB_BABBLE_STUCK_J) { | |
544 | int timeout = 10; | |
545 | ||
546 | /* | |
547 | * babble is due to noise, then set transmit idle (d7 bit) | |
548 | * to resume normal operation | |
549 | */ | |
086b2882 | 550 | babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL); |
371254ce | 551 | babble_ctl |= MUSB_BABBLE_FORCE_TXIDLE; |
086b2882 | 552 | musb_writeb(musb->mregs, MUSB_BABBLE_CTL, babble_ctl); |
371254ce GC |
553 | |
554 | /* wait till line monitor flag cleared */ | |
555 | dev_dbg(musb->controller, "Set TXIDLE, wait J to clear\n"); | |
556 | do { | |
086b2882 | 557 | babble_ctl = musb_readb(musb->mregs, MUSB_BABBLE_CTL); |
371254ce GC |
558 | udelay(1); |
559 | } while ((babble_ctl & MUSB_BABBLE_STUCK_J) && timeout--); | |
560 | ||
561 | /* check whether stuck_at_j bit cleared */ | |
562 | if (babble_ctl & MUSB_BABBLE_STUCK_J) { | |
563 | /* | |
564 | * real babble condition has occurred | |
565 | * restart the controller to start the | |
566 | * session again | |
567 | */ | |
568 | dev_dbg(musb->controller, "J not cleared, misc (%x)\n", | |
569 | babble_ctl); | |
570 | session_restart = true; | |
571 | } | |
572 | } else { | |
573 | session_restart = true; | |
574 | } | |
575 | ||
576 | return session_restart; | |
577 | } | |
578 | ||
b28a6432 | 579 | static int dsps_musb_recover(struct musb *musb) |
1d57de30 DM |
580 | { |
581 | struct device *dev = musb->controller; | |
582 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
011d0dd5 | 583 | int session_restart = 0; |
1d57de30 | 584 | |
371254ce | 585 | if (glue->sw_babble_enabled) |
3709ffca | 586 | session_restart = dsps_sw_babble_control(musb); |
011d0dd5 | 587 | else |
371254ce | 588 | session_restart = 1; |
1d57de30 | 589 | |
d0cddae7 | 590 | return session_restart ? 0 : -EPIPE; |
1d57de30 DM |
591 | } |
592 | ||
3e457371 TL |
593 | /* Similar to am35x, dm81xx support only 32-bit read operation */ |
594 | static void dsps_read_fifo32(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) | |
595 | { | |
596 | void __iomem *fifo = hw_ep->fifo; | |
597 | ||
598 | if (len >= 4) { | |
d30323f8 | 599 | ioread32_rep(fifo, dst, len >> 2); |
3e457371 TL |
600 | dst += len & ~0x03; |
601 | len &= 0x03; | |
602 | } | |
603 | ||
604 | /* Read any remaining 1 to 3 bytes */ | |
605 | if (len > 0) { | |
606 | u32 val = musb_readl(fifo, 0); | |
607 | memcpy(dst, &val, len); | |
608 | } | |
609 | } | |
610 | ||
9ecb8875 | 611 | static struct musb_platform_ops dsps_ops = { |
f8e9f34f | 612 | .quirks = MUSB_DMA_CPPI41 | MUSB_INDEXED_EP, |
9ecb8875 AKG |
613 | .init = dsps_musb_init, |
614 | .exit = dsps_musb_exit, | |
615 | ||
7f6283ed TL |
616 | #ifdef CONFIG_USB_TI_CPPI41_DMA |
617 | .dma_init = cppi41_dma_controller_create, | |
618 | .dma_exit = cppi41_dma_controller_destroy, | |
619 | #endif | |
9ecb8875 AKG |
620 | .enable = dsps_musb_enable, |
621 | .disable = dsps_musb_disable, | |
622 | ||
943c1397 | 623 | .set_mode = dsps_musb_set_mode, |
b28a6432 | 624 | .recover = dsps_musb_recover, |
9ecb8875 AKG |
625 | }; |
626 | ||
627 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
628 | ||
97238b35 | 629 | static int get_int_prop(struct device_node *dn, const char *s) |
9ecb8875 | 630 | { |
97238b35 SAS |
631 | int ret; |
632 | u32 val; | |
633 | ||
634 | ret = of_property_read_u32(dn, s, &val); | |
635 | if (ret) | |
636 | return 0; | |
637 | return val; | |
638 | } | |
639 | ||
c031a7d4 SAS |
640 | static int get_musb_port_mode(struct device *dev) |
641 | { | |
642 | enum usb_dr_mode mode; | |
643 | ||
06e7114f | 644 | mode = usb_get_dr_mode(dev); |
c031a7d4 SAS |
645 | switch (mode) { |
646 | case USB_DR_MODE_HOST: | |
647 | return MUSB_PORT_MODE_HOST; | |
648 | ||
649 | case USB_DR_MODE_PERIPHERAL: | |
650 | return MUSB_PORT_MODE_GADGET; | |
651 | ||
652 | case USB_DR_MODE_UNKNOWN: | |
653 | case USB_DR_MODE_OTG: | |
654 | default: | |
655 | return MUSB_PORT_MODE_DUAL_ROLE; | |
2b84f92b | 656 | } |
c031a7d4 SAS |
657 | } |
658 | ||
97238b35 SAS |
659 | static int dsps_create_musb_pdev(struct dsps_glue *glue, |
660 | struct platform_device *parent) | |
661 | { | |
662 | struct musb_hdrc_platform_data pdata; | |
9ecb8875 | 663 | struct resource resources[2]; |
c031a7d4 | 664 | struct resource *res; |
97238b35 SAS |
665 | struct device *dev = &parent->dev; |
666 | struct musb_hdrc_config *config; | |
667 | struct platform_device *musb; | |
668 | struct device_node *dn = parent->dev.of_node; | |
606bf4d5 | 669 | int ret, val; |
9ecb8875 | 670 | |
97238b35 | 671 | memset(resources, 0, sizeof(resources)); |
c031a7d4 SAS |
672 | res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc"); |
673 | if (!res) { | |
97238b35 | 674 | dev_err(dev, "failed to get memory.\n"); |
c031a7d4 | 675 | return -EINVAL; |
9ecb8875 | 676 | } |
c031a7d4 | 677 | resources[0] = *res; |
97238b35 | 678 | |
c031a7d4 SAS |
679 | res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc"); |
680 | if (!res) { | |
97238b35 | 681 | dev_err(dev, "failed to get irq.\n"); |
c031a7d4 | 682 | return -EINVAL; |
9ecb8875 | 683 | } |
c031a7d4 | 684 | resources[1] = *res; |
9ecb8875 AKG |
685 | |
686 | /* allocate the child platform device */ | |
2f771164 | 687 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
688 | if (!musb) { |
689 | dev_err(dev, "failed to allocate musb device\n"); | |
97238b35 | 690 | return -ENOMEM; |
9ecb8875 AKG |
691 | } |
692 | ||
693 | musb->dev.parent = dev; | |
694 | musb->dev.dma_mask = &musb_dmamask; | |
695 | musb->dev.coherent_dma_mask = musb_dmamask; | |
696 | ||
97238b35 | 697 | glue->musb = musb; |
9ecb8875 | 698 | |
97238b35 SAS |
699 | ret = platform_device_add_resources(musb, resources, |
700 | ARRAY_SIZE(resources)); | |
9ecb8875 AKG |
701 | if (ret) { |
702 | dev_err(dev, "failed to add resources\n"); | |
97238b35 | 703 | goto err; |
9ecb8875 AKG |
704 | } |
705 | ||
97238b35 SAS |
706 | config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL); |
707 | if (!config) { | |
97238b35 SAS |
708 | ret = -ENOMEM; |
709 | goto err; | |
65145677 | 710 | } |
97238b35 SAS |
711 | pdata.config = config; |
712 | pdata.platform_ops = &dsps_ops; | |
65145677 | 713 | |
c031a7d4 SAS |
714 | config->num_eps = get_int_prop(dn, "mentor,num-eps"); |
715 | config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); | |
869c5978 | 716 | config->host_port_deassert_reset_at_resume = 1; |
c031a7d4 SAS |
717 | pdata.mode = get_musb_port_mode(dev); |
718 | /* DT keeps this entry in mA, musb expects it as per USB spec */ | |
719 | pdata.power = get_int_prop(dn, "mentor,power") / 2; | |
606bf4d5 TL |
720 | |
721 | ret = of_property_read_u32(dn, "mentor,multipoint", &val); | |
722 | if (!ret && val) | |
723 | config->multipoint = true; | |
65145677 | 724 | |
63863b98 | 725 | config->maximum_speed = usb_get_maximum_speed(&parent->dev); |
41932b9b BL |
726 | switch (config->maximum_speed) { |
727 | case USB_SPEED_LOW: | |
728 | case USB_SPEED_FULL: | |
729 | break; | |
730 | case USB_SPEED_SUPER: | |
731 | dev_warn(dev, "ignore incorrect maximum_speed " | |
732 | "(super-speed) setting in dts"); | |
733 | /* fall through */ | |
734 | default: | |
735 | config->maximum_speed = USB_SPEED_HIGH; | |
736 | } | |
737 | ||
97238b35 | 738 | ret = platform_device_add_data(musb, &pdata, sizeof(pdata)); |
9ecb8875 AKG |
739 | if (ret) { |
740 | dev_err(dev, "failed to add platform_data\n"); | |
97238b35 | 741 | goto err; |
9ecb8875 AKG |
742 | } |
743 | ||
744 | ret = platform_device_add(musb); | |
745 | if (ret) { | |
746 | dev_err(dev, "failed to register musb device\n"); | |
97238b35 | 747 | goto err; |
9ecb8875 | 748 | } |
9ecb8875 AKG |
749 | return 0; |
750 | ||
97238b35 | 751 | err: |
9ecb8875 | 752 | platform_device_put(musb); |
9ecb8875 AKG |
753 | return ret; |
754 | } | |
755 | ||
41ac7b3a | 756 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 757 | { |
65145677 AKG |
758 | const struct of_device_id *match; |
759 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 | 760 | struct dsps_glue *glue; |
97238b35 | 761 | int ret; |
9ecb8875 | 762 | |
4fc4b274 SAS |
763 | if (!strcmp(pdev->name, "musb-hdrc")) |
764 | return -ENODEV; | |
765 | ||
cc506036 | 766 | match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); |
65145677 AKG |
767 | if (!match) { |
768 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
97238b35 | 769 | return -EINVAL; |
65145677 AKG |
770 | } |
771 | wrp = match->data; | |
9ecb8875 | 772 | |
3e457371 TL |
773 | if (of_device_is_compatible(pdev->dev.of_node, "ti,musb-dm816")) |
774 | dsps_ops.read_fifo = dsps_read_fifo32; | |
775 | ||
9ecb8875 | 776 | /* allocate glue */ |
de9db572 | 777 | glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); |
0816ea2f | 778 | if (!glue) |
97238b35 | 779 | return -ENOMEM; |
9ecb8875 AKG |
780 | |
781 | glue->dev = &pdev->dev; | |
97238b35 | 782 | glue->wrp = wrp; |
9ecb8875 | 783 | |
9ecb8875 | 784 | platform_set_drvdata(pdev, glue); |
9ecb8875 | 785 | pm_runtime_enable(&pdev->dev); |
65b3f50e TL |
786 | pm_runtime_use_autosuspend(&pdev->dev); |
787 | pm_runtime_set_autosuspend_delay(&pdev->dev, 200); | |
9ecb8875 AKG |
788 | |
789 | ret = pm_runtime_get_sync(&pdev->dev); | |
790 | if (ret < 0) { | |
791 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
792 | goto err2; |
793 | } | |
794 | ||
97238b35 SAS |
795 | ret = dsps_create_musb_pdev(glue, pdev); |
796 | if (ret) | |
797 | goto err3; | |
9ecb8875 | 798 | |
65b3f50e TL |
799 | pm_runtime_mark_last_busy(&pdev->dev); |
800 | pm_runtime_put_autosuspend(&pdev->dev); | |
801 | ||
9ecb8875 AKG |
802 | return 0; |
803 | ||
804 | err3: | |
65b3f50e | 805 | pm_runtime_put_sync(&pdev->dev); |
9ecb8875 | 806 | err2: |
65b3f50e | 807 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
0e38c4ed | 808 | pm_runtime_disable(&pdev->dev); |
9ecb8875 AKG |
809 | return ret; |
810 | } | |
97238b35 | 811 | |
fb4e98ab | 812 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
813 | { |
814 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
815 | ||
97238b35 | 816 | platform_device_unregister(glue->musb); |
9ecb8875 AKG |
817 | |
818 | /* disable usbss clocks */ | |
65b3f50e TL |
819 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
820 | pm_runtime_put_sync(&pdev->dev); | |
9ecb8875 | 821 | pm_runtime_disable(&pdev->dev); |
40f099e3 | 822 | |
9ecb8875 AKG |
823 | return 0; |
824 | } | |
825 | ||
fa7b4ca5 | 826 | static const struct dsps_musb_wrapper am33xx_driver_data = { |
9ecb8875 AKG |
827 | .revision = 0x00, |
828 | .control = 0x14, | |
829 | .status = 0x18, | |
9ecb8875 AKG |
830 | .epintr_set = 0x38, |
831 | .epintr_clear = 0x40, | |
832 | .epintr_status = 0x30, | |
833 | .coreintr_set = 0x3c, | |
834 | .coreintr_clear = 0x44, | |
835 | .coreintr_status = 0x34, | |
836 | .phy_utmi = 0xe0, | |
837 | .mode = 0xe8, | |
b991f9b7 DM |
838 | .tx_mode = 0x70, |
839 | .rx_mode = 0x74, | |
9ecb8875 AKG |
840 | .reset = 0, |
841 | .otg_disable = 21, | |
842 | .iddig = 8, | |
943c1397 | 843 | .iddig_mux = 7, |
9ecb8875 AKG |
844 | .usb_shift = 0, |
845 | .usb_mask = 0x1ff, | |
846 | .usb_bitmap = (0x1ff << 0), | |
847 | .drvvbus = 8, | |
848 | .txep_shift = 0, | |
849 | .txep_mask = 0xffff, | |
850 | .txep_bitmap = (0xffff << 0), | |
851 | .rxep_shift = 16, | |
852 | .rxep_mask = 0xfffe, | |
853 | .rxep_bitmap = (0xfffe << 16), | |
9e204d88 | 854 | .poll_timeout = 2000, /* ms */ |
9ecb8875 AKG |
855 | }; |
856 | ||
2f82686e | 857 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 | 858 | { .compatible = "ti,musb-am33xx", |
3e457371 TL |
859 | .data = &am33xx_driver_data, }, |
860 | { .compatible = "ti,musb-dm816", | |
861 | .data = &am33xx_driver_data, }, | |
9ecb8875 AKG |
862 | { }, |
863 | }; | |
864 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
865 | ||
5b783983 | 866 | #ifdef CONFIG_PM_SLEEP |
869c5978 DM |
867 | static int dsps_suspend(struct device *dev) |
868 | { | |
869 | struct dsps_glue *glue = dev_get_drvdata(dev); | |
870 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
871 | struct musb *musb = platform_get_drvdata(glue->musb); | |
f042e9cb | 872 | void __iomem *mbase; |
869c5978 | 873 | |
468bcc2a | 874 | del_timer_sync(&glue->timer); |
f042e9cb SAS |
875 | |
876 | if (!musb) | |
877 | /* This can happen if the musb device is in -EPROBE_DEFER */ | |
878 | return 0; | |
879 | ||
880 | mbase = musb->ctrl_base; | |
086b2882 BL |
881 | glue->context.control = musb_readl(mbase, wrp->control); |
882 | glue->context.epintr = musb_readl(mbase, wrp->epintr_set); | |
883 | glue->context.coreintr = musb_readl(mbase, wrp->coreintr_set); | |
884 | glue->context.phy_utmi = musb_readl(mbase, wrp->phy_utmi); | |
885 | glue->context.mode = musb_readl(mbase, wrp->mode); | |
886 | glue->context.tx_mode = musb_readl(mbase, wrp->tx_mode); | |
887 | glue->context.rx_mode = musb_readl(mbase, wrp->rx_mode); | |
869c5978 DM |
888 | |
889 | return 0; | |
890 | } | |
891 | ||
892 | static int dsps_resume(struct device *dev) | |
893 | { | |
894 | struct dsps_glue *glue = dev_get_drvdata(dev); | |
895 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
896 | struct musb *musb = platform_get_drvdata(glue->musb); | |
f042e9cb SAS |
897 | void __iomem *mbase; |
898 | ||
899 | if (!musb) | |
900 | return 0; | |
869c5978 | 901 | |
f042e9cb | 902 | mbase = musb->ctrl_base; |
086b2882 BL |
903 | musb_writel(mbase, wrp->control, glue->context.control); |
904 | musb_writel(mbase, wrp->epintr_set, glue->context.epintr); | |
905 | musb_writel(mbase, wrp->coreintr_set, glue->context.coreintr); | |
906 | musb_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi); | |
907 | musb_writel(mbase, wrp->mode, glue->context.mode); | |
908 | musb_writel(mbase, wrp->tx_mode, glue->context.tx_mode); | |
909 | musb_writel(mbase, wrp->rx_mode, glue->context.rx_mode); | |
e47d9254 | 910 | if (musb->xceiv->otg->state == OTG_STATE_B_IDLE && |
53185b3a | 911 | musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) |
9e204d88 FB |
912 | mod_timer(&glue->timer, jiffies + |
913 | msecs_to_jiffies(wrp->poll_timeout)); | |
869c5978 DM |
914 | |
915 | return 0; | |
916 | } | |
917 | #endif | |
918 | ||
919 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); | |
920 | ||
9ecb8875 AKG |
921 | static struct platform_driver dsps_usbss_driver = { |
922 | .probe = dsps_probe, | |
7690417d | 923 | .remove = dsps_remove, |
9ecb8875 AKG |
924 | .driver = { |
925 | .name = "musb-dsps", | |
869c5978 | 926 | .pm = &dsps_pm_ops, |
b432cb83 | 927 | .of_match_table = musb_dsps_of_match, |
9ecb8875 | 928 | }, |
9ecb8875 AKG |
929 | }; |
930 | ||
931 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
932 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
933 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
934 | MODULE_LICENSE("GPL v2"); | |
935 | ||
97238b35 | 936 | module_platform_driver(dsps_usbss_driver); |