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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> | |
65145677 | 34 | #include <linux/of.h> |
ded017ee | 35 | #include <linux/err.h> |
9ecb8875 AKG |
36 | #include <linux/platform_device.h> |
37 | #include <linux/dma-mapping.h> | |
38 | #include <linux/pm_runtime.h> | |
39 | #include <linux/module.h> | |
78c289f8 | 40 | #include <linux/usb/nop-usb-xceiv.h> |
e8c4a7ac | 41 | #include <linux/platform_data/usb-omap.h> |
9ecb8875 AKG |
42 | |
43 | #include <linux/of.h> | |
44 | #include <linux/of_device.h> | |
45 | #include <linux/of_address.h> | |
46 | ||
9ecb8875 AKG |
47 | #include "musb_core.h" |
48 | ||
65145677 AKG |
49 | #ifdef CONFIG_OF |
50 | static const struct of_device_id musb_dsps_of_match[]; | |
51 | #endif | |
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; | |
78 | u16 eoi; | |
79 | u16 epintr_set; | |
80 | u16 epintr_clear; | |
81 | u16 epintr_status; | |
82 | u16 coreintr_set; | |
83 | u16 coreintr_clear; | |
84 | u16 coreintr_status; | |
85 | u16 phy_utmi; | |
86 | u16 mode; | |
87 | ||
88 | /* bit positions for control */ | |
89 | unsigned reset:5; | |
90 | ||
91 | /* bit positions for interrupt */ | |
92 | unsigned usb_shift:5; | |
93 | u32 usb_mask; | |
94 | u32 usb_bitmap; | |
95 | unsigned drvvbus:5; | |
96 | ||
97 | unsigned txep_shift:5; | |
98 | u32 txep_mask; | |
99 | u32 txep_bitmap; | |
100 | ||
101 | unsigned rxep_shift:5; | |
102 | u32 rxep_mask; | |
103 | u32 rxep_bitmap; | |
104 | ||
105 | /* bit positions for phy_utmi */ | |
106 | unsigned otg_disable:5; | |
107 | ||
108 | /* bit positions for mode */ | |
109 | unsigned iddig:5; | |
110 | /* miscellaneous stuff */ | |
111 | u32 musb_core_offset; | |
112 | u8 poll_seconds; | |
db4a9320 R |
113 | /* number of musb instances */ |
114 | u8 instances; | |
9ecb8875 AKG |
115 | }; |
116 | ||
117 | /** | |
118 | * DSPS glue structure. | |
119 | */ | |
120 | struct dsps_glue { | |
121 | struct device *dev; | |
db4a9320 | 122 | struct platform_device *musb[2]; /* child musb pdev */ |
9ecb8875 | 123 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
db4a9320 R |
124 | struct timer_list timer[2]; /* otg_workaround timer */ |
125 | unsigned long last_timer[2]; /* last timer data for each instance */ | |
c68bb4c6 | 126 | u32 __iomem *usb_ctrl[2]; |
9ecb8875 AKG |
127 | }; |
128 | ||
c68bb4c6 SD |
129 | #define DSPS_AM33XX_CONTROL_MODULE_PHYS_0 0x44e10620 |
130 | #define DSPS_AM33XX_CONTROL_MODULE_PHYS_1 0x44e10628 | |
131 | ||
132 | static const resource_size_t dsps_control_module_phys[] = { | |
133 | DSPS_AM33XX_CONTROL_MODULE_PHYS_0, | |
134 | DSPS_AM33XX_CONTROL_MODULE_PHYS_1, | |
135 | }; | |
136 | ||
deeeb9ee AM |
137 | #define USBPHY_CM_PWRDN (1 << 0) |
138 | #define USBPHY_OTG_PWRDN (1 << 1) | |
139 | #define USBPHY_OTGVDET_EN (1 << 19) | |
140 | #define USBPHY_OTGSESSEND_EN (1 << 20) | |
141 | ||
c68bb4c6 SD |
142 | /** |
143 | * musb_dsps_phy_control - phy on/off | |
144 | * @glue: struct dsps_glue * | |
145 | * @id: musb instance | |
146 | * @on: flag for phy to be switched on or off | |
147 | * | |
148 | * This is to enable the PHY using usb_ctrl register in system control | |
149 | * module space. | |
150 | * | |
151 | * XXX: This function will be removed once we have a seperate driver for | |
152 | * control module | |
153 | */ | |
154 | static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on) | |
155 | { | |
156 | u32 usbphycfg; | |
157 | ||
158 | usbphycfg = readl(glue->usb_ctrl[id]); | |
159 | ||
160 | if (on) { | |
161 | usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN); | |
162 | usbphycfg |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN; | |
163 | } else { | |
164 | usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN; | |
165 | } | |
166 | ||
167 | writel(usbphycfg, glue->usb_ctrl[id]); | |
168 | } | |
9ecb8875 AKG |
169 | /** |
170 | * dsps_musb_enable - enable interrupts | |
171 | */ | |
172 | static void dsps_musb_enable(struct musb *musb) | |
173 | { | |
174 | struct device *dev = musb->controller; | |
175 | struct platform_device *pdev = to_platform_device(dev->parent); | |
176 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
177 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
178 | void __iomem *reg_base = musb->ctrl_base; | |
179 | u32 epmask, coremask; | |
180 | ||
181 | /* Workaround: setup IRQs through both register sets. */ | |
182 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
183 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
184 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
185 | ||
186 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
187 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
188 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
189 | dsps_writel(reg_base, wrp->coreintr_set, |
190 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
9ecb8875 AKG |
191 | } |
192 | ||
193 | /** | |
194 | * dsps_musb_disable - disable HDRC and flush interrupts | |
195 | */ | |
196 | static void dsps_musb_disable(struct musb *musb) | |
197 | { | |
198 | struct device *dev = musb->controller; | |
199 | struct platform_device *pdev = to_platform_device(dev->parent); | |
200 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
201 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
202 | void __iomem *reg_base = musb->ctrl_base; | |
203 | ||
204 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
205 | dsps_writel(reg_base, wrp->epintr_clear, | |
206 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
207 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
208 | dsps_writel(reg_base, wrp->eoi, 0); | |
209 | } | |
210 | ||
211 | static void otg_timer(unsigned long _musb) | |
212 | { | |
213 | struct musb *musb = (void *)_musb; | |
214 | void __iomem *mregs = musb->mregs; | |
215 | struct device *dev = musb->controller; | |
db4a9320 R |
216 | struct platform_device *pdev = to_platform_device(dev); |
217 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
218 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
219 | u8 devctl; | |
220 | unsigned long flags; | |
221 | ||
222 | /* | |
223 | * We poll because DSPS IP's won't expose several OTG-critical | |
224 | * status change events (from the transceiver) otherwise. | |
225 | */ | |
226 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
227 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
228 | otg_state_string(musb->xceiv->state)); | |
229 | ||
230 | spin_lock_irqsave(&musb->lock, flags); | |
231 | switch (musb->xceiv->state) { | |
232 | case OTG_STATE_A_WAIT_BCON: | |
233 | devctl &= ~MUSB_DEVCTL_SESSION; | |
234 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
235 | ||
236 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); | |
237 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
238 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
239 | MUSB_DEV_MODE(musb); | |
240 | } else { | |
241 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
242 | MUSB_HST_MODE(musb); | |
243 | } | |
244 | break; | |
245 | case OTG_STATE_A_WAIT_VFALL: | |
246 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
247 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
248 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
249 | break; | |
250 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
251 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
252 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
db4a9320 | 253 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
254 | jiffies + wrp->poll_seconds * HZ); |
255 | else | |
256 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
257 | break; | |
258 | default: | |
259 | break; | |
260 | } | |
261 | spin_unlock_irqrestore(&musb->lock, flags); | |
262 | } | |
263 | ||
264 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) | |
265 | { | |
266 | struct device *dev = musb->controller; | |
db4a9320 R |
267 | struct platform_device *pdev = to_platform_device(dev); |
268 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
269 | |
270 | if (timeout == 0) | |
271 | timeout = jiffies + msecs_to_jiffies(3); | |
272 | ||
273 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
274 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
275 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
276 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
277 | otg_state_string(musb->xceiv->state)); | |
db4a9320 R |
278 | del_timer(&glue->timer[pdev->id]); |
279 | glue->last_timer[pdev->id] = jiffies; | |
9ecb8875 AKG |
280 | return; |
281 | } | |
282 | ||
db4a9320 R |
283 | if (time_after(glue->last_timer[pdev->id], timeout) && |
284 | timer_pending(&glue->timer[pdev->id])) { | |
9ecb8875 AKG |
285 | dev_dbg(musb->controller, |
286 | "Longer idle timer already pending, ignoring...\n"); | |
287 | return; | |
288 | } | |
db4a9320 | 289 | glue->last_timer[pdev->id] = timeout; |
9ecb8875 AKG |
290 | |
291 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
292 | otg_state_string(musb->xceiv->state), | |
293 | jiffies_to_msecs(timeout - jiffies)); | |
db4a9320 | 294 | mod_timer(&glue->timer[pdev->id], timeout); |
9ecb8875 AKG |
295 | } |
296 | ||
297 | static irqreturn_t dsps_interrupt(int irq, void *hci) | |
298 | { | |
299 | struct musb *musb = hci; | |
300 | void __iomem *reg_base = musb->ctrl_base; | |
301 | struct device *dev = musb->controller; | |
db4a9320 R |
302 | struct platform_device *pdev = to_platform_device(dev); |
303 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
304 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
305 | unsigned long flags; | |
306 | irqreturn_t ret = IRQ_NONE; | |
307 | u32 epintr, usbintr; | |
308 | ||
309 | spin_lock_irqsave(&musb->lock, flags); | |
310 | ||
311 | /* Get endpoint interrupts */ | |
312 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
313 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
314 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
315 | ||
316 | if (epintr) | |
317 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
318 | ||
319 | /* Get usb core interrupts */ | |
320 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
321 | if (!usbintr && !epintr) | |
322 | goto eoi; | |
323 | ||
324 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
325 | if (usbintr) | |
326 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
327 | ||
328 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
329 | usbintr, epintr); | |
330 | /* | |
331 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
332 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
333 | * switch appropriately between halves of the OTG state machine. | |
334 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
335 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
336 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
337 | */ | |
032ec49f | 338 | if (usbintr & MUSB_INTR_BABBLE) |
984e833c | 339 | pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); |
9ecb8875 AKG |
340 | |
341 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
342 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
343 | void __iomem *mregs = musb->mregs; | |
344 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
345 | int err; | |
346 | ||
032ec49f | 347 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
348 | if (err) { |
349 | /* | |
350 | * The Mentor core doesn't debounce VBUS as needed | |
351 | * to cope with device connect current spikes. This | |
352 | * means it's not uncommon for bus-powered devices | |
353 | * to get VBUS errors during enumeration. | |
354 | * | |
355 | * This is a workaround, but newer RTL from Mentor | |
356 | * seems to allow a better one: "re"-starting sessions | |
357 | * without waiting for VBUS to stop registering in | |
358 | * devctl. | |
359 | */ | |
360 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
361 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
db4a9320 | 362 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
363 | jiffies + wrp->poll_seconds * HZ); |
364 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 365 | } else if (drvvbus) { |
9ecb8875 AKG |
366 | musb->is_active = 1; |
367 | MUSB_HST_MODE(musb); | |
368 | musb->xceiv->otg->default_a = 1; | |
369 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
db4a9320 | 370 | del_timer(&glue->timer[pdev->id]); |
9ecb8875 AKG |
371 | } else { |
372 | musb->is_active = 0; | |
373 | MUSB_DEV_MODE(musb); | |
374 | musb->xceiv->otg->default_a = 0; | |
375 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
376 | } | |
377 | ||
378 | /* NOTE: this must complete power-on within 100 ms. */ | |
379 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
380 | drvvbus ? "on" : "off", | |
381 | otg_state_string(musb->xceiv->state), | |
382 | err ? " ERROR" : "", | |
383 | devctl); | |
384 | ret = IRQ_HANDLED; | |
385 | } | |
386 | ||
387 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
388 | ret |= musb_interrupt(musb); | |
389 | ||
390 | eoi: | |
391 | /* EOI needs to be written for the IRQ to be re-asserted. */ | |
392 | if (ret == IRQ_HANDLED || epintr || usbintr) | |
393 | dsps_writel(reg_base, wrp->eoi, 1); | |
394 | ||
395 | /* Poll for ID change */ | |
032ec49f | 396 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
db4a9320 R |
397 | mod_timer(&glue->timer[pdev->id], |
398 | jiffies + wrp->poll_seconds * HZ); | |
9ecb8875 AKG |
399 | |
400 | spin_unlock_irqrestore(&musb->lock, flags); | |
401 | ||
402 | return ret; | |
403 | } | |
404 | ||
405 | static int dsps_musb_init(struct musb *musb) | |
406 | { | |
407 | struct device *dev = musb->controller; | |
db4a9320 R |
408 | struct platform_device *pdev = to_platform_device(dev); |
409 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 410 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
9ecb8875 AKG |
411 | void __iomem *reg_base = musb->ctrl_base; |
412 | u32 rev, val; | |
413 | int status; | |
414 | ||
415 | /* mentor core register starts at offset of 0x400 from musb base */ | |
416 | musb->mregs += wrp->musb_core_offset; | |
417 | ||
d7554226 AM |
418 | /* NOP driver needs change if supporting dual instance */ |
419 | usb_nop_xceiv_register(); | |
662dca54 | 420 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 421 | if (IS_ERR_OR_NULL(musb->xceiv)) |
9ecb8875 AKG |
422 | return -ENODEV; |
423 | ||
424 | /* Returns zero if e.g. not clocked */ | |
425 | rev = dsps_readl(reg_base, wrp->revision); | |
426 | if (!rev) { | |
427 | status = -ENODEV; | |
428 | goto err0; | |
429 | } | |
430 | ||
db4a9320 | 431 | setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
432 | |
433 | /* Reset the musb */ | |
434 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
435 | ||
436 | /* Start the on-chip PHY and its PLL. */ | |
c68bb4c6 | 437 | musb_dsps_phy_control(glue, pdev->id, 1); |
9ecb8875 AKG |
438 | |
439 | musb->isr = dsps_interrupt; | |
440 | ||
441 | /* reset the otgdisable bit, needed for host mode to work */ | |
442 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
443 | val &= ~(1 << wrp->otg_disable); | |
444 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
445 | ||
446 | /* clear level interrupt */ | |
447 | dsps_writel(reg_base, wrp->eoi, 0); | |
448 | ||
449 | return 0; | |
450 | err0: | |
721002ec | 451 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
452 | usb_nop_xceiv_unregister(); |
453 | return status; | |
454 | } | |
455 | ||
456 | static int dsps_musb_exit(struct musb *musb) | |
457 | { | |
458 | struct device *dev = musb->controller; | |
db4a9320 R |
459 | struct platform_device *pdev = to_platform_device(dev); |
460 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 461 | |
db4a9320 | 462 | del_timer_sync(&glue->timer[pdev->id]); |
9ecb8875 AKG |
463 | |
464 | /* Shutdown the on-chip PHY and its PLL. */ | |
c68bb4c6 | 465 | musb_dsps_phy_control(glue, pdev->id, 0); |
9ecb8875 AKG |
466 | |
467 | /* NOP driver needs change if supporting dual instance */ | |
721002ec | 468 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
469 | usb_nop_xceiv_unregister(); |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static struct musb_platform_ops dsps_ops = { | |
475 | .init = dsps_musb_init, | |
476 | .exit = dsps_musb_exit, | |
477 | ||
478 | .enable = dsps_musb_enable, | |
479 | .disable = dsps_musb_disable, | |
480 | ||
481 | .try_idle = dsps_musb_try_idle, | |
482 | }; | |
483 | ||
484 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
485 | ||
41ac7b3a | 486 | static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) |
9ecb8875 AKG |
487 | { |
488 | struct device *dev = glue->dev; | |
489 | struct platform_device *pdev = to_platform_device(dev); | |
490 | struct musb_hdrc_platform_data *pdata = dev->platform_data; | |
65145677 AKG |
491 | struct device_node *np = pdev->dev.of_node; |
492 | struct musb_hdrc_config *config; | |
9ecb8875 AKG |
493 | struct platform_device *musb; |
494 | struct resource *res; | |
495 | struct resource resources[2]; | |
ca749b2a | 496 | char res_name[11]; |
2f771164 | 497 | int ret; |
9ecb8875 | 498 | |
c68bb4c6 SD |
499 | resources[0].start = dsps_control_module_phys[id]; |
500 | resources[0].end = resources[0].start + SZ_4 - 1; | |
501 | resources[0].flags = IORESOURCE_MEM; | |
502 | ||
148e1134 TR |
503 | glue->usb_ctrl[id] = devm_ioremap_resource(&pdev->dev, resources); |
504 | if (IS_ERR(glue->usb_ctrl[id])) { | |
505 | ret = PTR_ERR(glue->usb_ctrl[id]); | |
c68bb4c6 SD |
506 | goto err0; |
507 | } | |
508 | ||
3e594b18 AM |
509 | /* first resource is for usbss, so start index from 1 */ |
510 | res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1); | |
9ecb8875 | 511 | if (!res) { |
3e594b18 | 512 | dev_err(dev, "failed to get memory for instance %d\n", id); |
9ecb8875 AKG |
513 | ret = -ENODEV; |
514 | goto err0; | |
515 | } | |
516 | res->parent = NULL; | |
517 | resources[0] = *res; | |
518 | ||
3e594b18 AM |
519 | /* first resource is for usbss, so start index from 1 */ |
520 | res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1); | |
9ecb8875 | 521 | if (!res) { |
3e594b18 | 522 | dev_err(dev, "failed to get irq for instance %d\n", id); |
9ecb8875 AKG |
523 | ret = -ENODEV; |
524 | goto err0; | |
525 | } | |
9ecb8875 AKG |
526 | res->parent = NULL; |
527 | resources[1] = *res; | |
3bb55348 | 528 | resources[1].name = "mc"; |
9ecb8875 AKG |
529 | |
530 | /* allocate the child platform device */ | |
2f771164 | 531 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
532 | if (!musb) { |
533 | dev_err(dev, "failed to allocate musb device\n"); | |
534 | ret = -ENOMEM; | |
2f771164 | 535 | goto err0; |
9ecb8875 AKG |
536 | } |
537 | ||
538 | musb->dev.parent = dev; | |
539 | musb->dev.dma_mask = &musb_dmamask; | |
540 | musb->dev.coherent_dma_mask = musb_dmamask; | |
541 | ||
db4a9320 | 542 | glue->musb[id] = musb; |
9ecb8875 AKG |
543 | |
544 | ret = platform_device_add_resources(musb, resources, 2); | |
545 | if (ret) { | |
546 | dev_err(dev, "failed to add resources\n"); | |
65b3d52d | 547 | goto err2; |
9ecb8875 AKG |
548 | } |
549 | ||
65145677 AKG |
550 | if (np) { |
551 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
552 | if (!pdata) { | |
553 | dev_err(&pdev->dev, | |
554 | "failed to allocate musb platfrom data\n"); | |
555 | ret = -ENOMEM; | |
556 | goto err2; | |
557 | } | |
558 | ||
559 | config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); | |
560 | if (!config) { | |
561 | dev_err(&pdev->dev, | |
562 | "failed to allocate musb hdrc config\n"); | |
563 | goto err2; | |
564 | } | |
565 | ||
566 | of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); | |
567 | of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); | |
ca749b2a | 568 | snprintf(res_name, sizeof(res_name), "port%d-mode", id); |
65145677 AKG |
569 | of_property_read_u32(np, res_name, (u32 *)&pdata->mode); |
570 | of_property_read_u32(np, "power", (u32 *)&pdata->power); | |
571 | config->multipoint = of_property_read_bool(np, "multipoint"); | |
572 | ||
573 | pdata->config = config; | |
574 | } | |
575 | ||
576 | pdata->platform_ops = &dsps_ops; | |
577 | ||
9ecb8875 AKG |
578 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); |
579 | if (ret) { | |
580 | dev_err(dev, "failed to add platform_data\n"); | |
65b3d52d | 581 | goto err2; |
9ecb8875 AKG |
582 | } |
583 | ||
584 | ret = platform_device_add(musb); | |
585 | if (ret) { | |
586 | dev_err(dev, "failed to register musb device\n"); | |
65b3d52d | 587 | goto err2; |
9ecb8875 AKG |
588 | } |
589 | ||
590 | return 0; | |
591 | ||
65b3d52d | 592 | err2: |
9ecb8875 AKG |
593 | platform_device_put(musb); |
594 | err0: | |
595 | return ret; | |
596 | } | |
597 | ||
41ac7b3a | 598 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 599 | { |
65145677 AKG |
600 | struct device_node *np = pdev->dev.of_node; |
601 | const struct of_device_id *match; | |
602 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 AKG |
603 | struct dsps_glue *glue; |
604 | struct resource *iomem; | |
db4a9320 | 605 | int ret, i; |
9ecb8875 | 606 | |
65145677 AKG |
607 | match = of_match_node(musb_dsps_of_match, np); |
608 | if (!match) { | |
609 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
610 | ret = -EINVAL; | |
611 | goto err0; | |
612 | } | |
613 | wrp = match->data; | |
9ecb8875 AKG |
614 | |
615 | /* allocate glue */ | |
616 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
617 | if (!glue) { | |
618 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
619 | ret = -ENOMEM; | |
620 | goto err0; | |
621 | } | |
622 | ||
623 | /* get memory resource */ | |
624 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
625 | if (!iomem) { | |
626 | dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); | |
627 | ret = -ENODEV; | |
628 | goto err1; | |
629 | } | |
630 | ||
631 | glue->dev = &pdev->dev; | |
632 | ||
633 | glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); | |
634 | if (!glue->wrp) { | |
635 | dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); | |
636 | ret = -ENOMEM; | |
637 | goto err1; | |
638 | } | |
639 | platform_set_drvdata(pdev, glue); | |
640 | ||
9ecb8875 AKG |
641 | /* enable the usbss clocks */ |
642 | pm_runtime_enable(&pdev->dev); | |
643 | ||
644 | ret = pm_runtime_get_sync(&pdev->dev); | |
645 | if (ret < 0) { | |
646 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
647 | goto err2; |
648 | } | |
649 | ||
db4a9320 R |
650 | /* create the child platform device for all instances of musb */ |
651 | for (i = 0; i < wrp->instances ; i++) { | |
652 | ret = dsps_create_musb_pdev(glue, i); | |
653 | if (ret != 0) { | |
654 | dev_err(&pdev->dev, "failed to create child pdev\n"); | |
655 | /* release resources of previously created instances */ | |
656 | for (i--; i >= 0 ; i--) | |
2f771164 | 657 | platform_device_unregister(glue->musb[i]); |
db4a9320 R |
658 | goto err3; |
659 | } | |
9ecb8875 AKG |
660 | } |
661 | ||
662 | return 0; | |
663 | ||
664 | err3: | |
0e38c4ed | 665 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 666 | err2: |
0e38c4ed | 667 | pm_runtime_disable(&pdev->dev); |
9ecb8875 AKG |
668 | kfree(glue->wrp); |
669 | err1: | |
670 | kfree(glue); | |
671 | err0: | |
672 | return ret; | |
673 | } | |
fb4e98ab | 674 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
675 | { |
676 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
db4a9320 R |
677 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
678 | int i; | |
9ecb8875 AKG |
679 | |
680 | /* delete the child platform device */ | |
db4a9320 | 681 | for (i = 0; i < wrp->instances ; i++) |
2f771164 | 682 | platform_device_unregister(glue->musb[i]); |
9ecb8875 AKG |
683 | |
684 | /* disable usbss clocks */ | |
685 | pm_runtime_put(&pdev->dev); | |
686 | pm_runtime_disable(&pdev->dev); | |
687 | kfree(glue->wrp); | |
688 | kfree(glue); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | #ifdef CONFIG_PM_SLEEP | |
693 | static int dsps_suspend(struct device *dev) | |
694 | { | |
c68bb4c6 SD |
695 | struct platform_device *pdev = to_platform_device(dev->parent); |
696 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
697 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
698 | int i; | |
9ecb8875 | 699 | |
c68bb4c6 SD |
700 | for (i = 0; i < wrp->instances; i++) |
701 | musb_dsps_phy_control(glue, i, 0); | |
9ecb8875 AKG |
702 | |
703 | return 0; | |
704 | } | |
705 | ||
706 | static int dsps_resume(struct device *dev) | |
707 | { | |
c68bb4c6 SD |
708 | struct platform_device *pdev = to_platform_device(dev->parent); |
709 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
710 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
711 | int i; | |
9ecb8875 | 712 | |
c68bb4c6 SD |
713 | for (i = 0; i < wrp->instances; i++) |
714 | musb_dsps_phy_control(glue, i, 1); | |
9ecb8875 AKG |
715 | |
716 | return 0; | |
717 | } | |
718 | #endif | |
719 | ||
720 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); | |
721 | ||
2f82686e | 722 | static const struct dsps_musb_wrapper ti81xx_driver_data = { |
9ecb8875 AKG |
723 | .revision = 0x00, |
724 | .control = 0x14, | |
725 | .status = 0x18, | |
726 | .eoi = 0x24, | |
727 | .epintr_set = 0x38, | |
728 | .epintr_clear = 0x40, | |
729 | .epintr_status = 0x30, | |
730 | .coreintr_set = 0x3c, | |
731 | .coreintr_clear = 0x44, | |
732 | .coreintr_status = 0x34, | |
733 | .phy_utmi = 0xe0, | |
734 | .mode = 0xe8, | |
735 | .reset = 0, | |
736 | .otg_disable = 21, | |
737 | .iddig = 8, | |
738 | .usb_shift = 0, | |
739 | .usb_mask = 0x1ff, | |
740 | .usb_bitmap = (0x1ff << 0), | |
741 | .drvvbus = 8, | |
742 | .txep_shift = 0, | |
743 | .txep_mask = 0xffff, | |
744 | .txep_bitmap = (0xffff << 0), | |
745 | .rxep_shift = 16, | |
746 | .rxep_mask = 0xfffe, | |
747 | .rxep_bitmap = (0xfffe << 16), | |
748 | .musb_core_offset = 0x400, | |
749 | .poll_seconds = 2, | |
3b46dd76 | 750 | .instances = 1, |
9ecb8875 AKG |
751 | }; |
752 | ||
2f82686e | 753 | static const struct platform_device_id musb_dsps_id_table[] = { |
9ecb8875 AKG |
754 | { |
755 | .name = "musb-ti81xx", | |
756 | .driver_data = (kernel_ulong_t) &ti81xx_driver_data, | |
757 | }, | |
758 | { }, /* Terminating Entry */ | |
759 | }; | |
760 | MODULE_DEVICE_TABLE(platform, musb_dsps_id_table); | |
761 | ||
65145677 | 762 | #ifdef CONFIG_OF |
2f82686e | 763 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 AKG |
764 | { .compatible = "ti,musb-am33xx", |
765 | .data = (void *) &ti81xx_driver_data, }, | |
9ecb8875 AKG |
766 | { }, |
767 | }; | |
768 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
65145677 | 769 | #endif |
9ecb8875 AKG |
770 | |
771 | static struct platform_driver dsps_usbss_driver = { | |
772 | .probe = dsps_probe, | |
7690417d | 773 | .remove = dsps_remove, |
9ecb8875 AKG |
774 | .driver = { |
775 | .name = "musb-dsps", | |
776 | .pm = &dsps_pm_ops, | |
65145677 | 777 | .of_match_table = of_match_ptr(musb_dsps_of_match), |
9ecb8875 AKG |
778 | }, |
779 | .id_table = musb_dsps_id_table, | |
780 | }; | |
781 | ||
782 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
783 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
784 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
785 | MODULE_LICENSE("GPL v2"); | |
786 | ||
787 | static int __init dsps_init(void) | |
788 | { | |
789 | return platform_driver_register(&dsps_usbss_driver); | |
790 | } | |
791 | subsys_initcall(dsps_init); | |
792 | ||
793 | static void __exit dsps_exit(void) | |
794 | { | |
795 | platform_driver_unregister(&dsps_usbss_driver); | |
796 | } | |
797 | module_exit(dsps_exit); |