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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> | |
78c289f8 | 39 | #include <linux/usb/nop-usb-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> | |
46 | ||
9ecb8875 AKG |
47 | #include "musb_core.h" |
48 | ||
65145677 | 49 | static const struct of_device_id musb_dsps_of_match[]; |
65145677 | 50 | |
9ecb8875 AKG |
51 | /** |
52 | * avoid using musb_readx()/musb_writex() as glue layer should not be | |
53 | * dependent on musb core layer symbols. | |
54 | */ | |
55 | static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) | |
56 | { return __raw_readb(addr + offset); } | |
57 | ||
58 | static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) | |
59 | { return __raw_readl(addr + offset); } | |
60 | ||
61 | static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) | |
62 | { __raw_writeb(data, addr + offset); } | |
63 | ||
64 | static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) | |
65 | { __raw_writel(data, addr + offset); } | |
66 | ||
67 | /** | |
68 | * DSPS musb wrapper register offset. | |
69 | * FIXME: This should be expanded to have all the wrapper registers from TI DSPS | |
70 | * musb ips. | |
71 | */ | |
72 | struct dsps_musb_wrapper { | |
73 | u16 revision; | |
74 | u16 control; | |
75 | u16 status; | |
9ecb8875 AKG |
76 | u16 epintr_set; |
77 | u16 epintr_clear; | |
78 | u16 epintr_status; | |
79 | u16 coreintr_set; | |
80 | u16 coreintr_clear; | |
81 | u16 coreintr_status; | |
82 | u16 phy_utmi; | |
83 | u16 mode; | |
84 | ||
85 | /* bit positions for control */ | |
86 | unsigned reset:5; | |
87 | ||
88 | /* bit positions for interrupt */ | |
89 | unsigned usb_shift:5; | |
90 | u32 usb_mask; | |
91 | u32 usb_bitmap; | |
92 | unsigned drvvbus:5; | |
93 | ||
94 | unsigned txep_shift:5; | |
95 | u32 txep_mask; | |
96 | u32 txep_bitmap; | |
97 | ||
98 | unsigned rxep_shift:5; | |
99 | u32 rxep_mask; | |
100 | u32 rxep_bitmap; | |
101 | ||
102 | /* bit positions for phy_utmi */ | |
103 | unsigned otg_disable:5; | |
104 | ||
105 | /* bit positions for mode */ | |
106 | unsigned iddig:5; | |
107 | /* miscellaneous stuff */ | |
108 | u32 musb_core_offset; | |
109 | u8 poll_seconds; | |
db4a9320 R |
110 | /* number of musb instances */ |
111 | u8 instances; | |
9ecb8875 AKG |
112 | }; |
113 | ||
114 | /** | |
115 | * DSPS glue structure. | |
116 | */ | |
117 | struct dsps_glue { | |
118 | struct device *dev; | |
db4a9320 | 119 | struct platform_device *musb[2]; /* child musb pdev */ |
9ecb8875 | 120 | const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ |
db4a9320 R |
121 | struct timer_list timer[2]; /* otg_workaround timer */ |
122 | unsigned long last_timer[2]; /* last timer data for each instance */ | |
c68bb4c6 | 123 | u32 __iomem *usb_ctrl[2]; |
9ecb8875 AKG |
124 | }; |
125 | ||
c68bb4c6 SD |
126 | #define DSPS_AM33XX_CONTROL_MODULE_PHYS_0 0x44e10620 |
127 | #define DSPS_AM33XX_CONTROL_MODULE_PHYS_1 0x44e10628 | |
128 | ||
129 | static const resource_size_t dsps_control_module_phys[] = { | |
130 | DSPS_AM33XX_CONTROL_MODULE_PHYS_0, | |
131 | DSPS_AM33XX_CONTROL_MODULE_PHYS_1, | |
132 | }; | |
133 | ||
deeeb9ee AM |
134 | #define USBPHY_CM_PWRDN (1 << 0) |
135 | #define USBPHY_OTG_PWRDN (1 << 1) | |
136 | #define USBPHY_OTGVDET_EN (1 << 19) | |
137 | #define USBPHY_OTGSESSEND_EN (1 << 20) | |
138 | ||
c68bb4c6 SD |
139 | /** |
140 | * musb_dsps_phy_control - phy on/off | |
141 | * @glue: struct dsps_glue * | |
142 | * @id: musb instance | |
143 | * @on: flag for phy to be switched on or off | |
144 | * | |
145 | * This is to enable the PHY using usb_ctrl register in system control | |
146 | * module space. | |
147 | * | |
148 | * XXX: This function will be removed once we have a seperate driver for | |
149 | * control module | |
150 | */ | |
151 | static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on) | |
152 | { | |
153 | u32 usbphycfg; | |
154 | ||
155 | usbphycfg = readl(glue->usb_ctrl[id]); | |
156 | ||
157 | if (on) { | |
158 | usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN); | |
159 | usbphycfg |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN; | |
160 | } else { | |
161 | usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN; | |
162 | } | |
163 | ||
164 | writel(usbphycfg, glue->usb_ctrl[id]); | |
165 | } | |
9ecb8875 AKG |
166 | /** |
167 | * dsps_musb_enable - enable interrupts | |
168 | */ | |
169 | static void dsps_musb_enable(struct musb *musb) | |
170 | { | |
171 | struct device *dev = musb->controller; | |
172 | struct platform_device *pdev = to_platform_device(dev->parent); | |
173 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
174 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
175 | void __iomem *reg_base = musb->ctrl_base; | |
176 | u32 epmask, coremask; | |
177 | ||
178 | /* Workaround: setup IRQs through both register sets. */ | |
179 | epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | | |
180 | ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); | |
181 | coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); | |
182 | ||
183 | dsps_writel(reg_base, wrp->epintr_set, epmask); | |
184 | dsps_writel(reg_base, wrp->coreintr_set, coremask); | |
185 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
032ec49f FB |
186 | dsps_writel(reg_base, wrp->coreintr_set, |
187 | (1 << wrp->drvvbus) << wrp->usb_shift); | |
9ecb8875 AKG |
188 | } |
189 | ||
190 | /** | |
191 | * dsps_musb_disable - disable HDRC and flush interrupts | |
192 | */ | |
193 | static void dsps_musb_disable(struct musb *musb) | |
194 | { | |
195 | struct device *dev = musb->controller; | |
196 | struct platform_device *pdev = to_platform_device(dev->parent); | |
197 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
198 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
199 | void __iomem *reg_base = musb->ctrl_base; | |
200 | ||
201 | dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); | |
202 | dsps_writel(reg_base, wrp->epintr_clear, | |
203 | wrp->txep_bitmap | wrp->rxep_bitmap); | |
204 | dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
9ecb8875 AKG |
205 | } |
206 | ||
207 | static void otg_timer(unsigned long _musb) | |
208 | { | |
209 | struct musb *musb = (void *)_musb; | |
210 | void __iomem *mregs = musb->mregs; | |
211 | struct device *dev = musb->controller; | |
db4a9320 R |
212 | struct platform_device *pdev = to_platform_device(dev); |
213 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
214 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
215 | u8 devctl; | |
216 | unsigned long flags; | |
217 | ||
218 | /* | |
219 | * We poll because DSPS IP's won't expose several OTG-critical | |
220 | * status change events (from the transceiver) otherwise. | |
221 | */ | |
222 | devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
223 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, | |
42c0bf1c | 224 | usb_otg_state_string(musb->xceiv->state)); |
9ecb8875 AKG |
225 | |
226 | spin_lock_irqsave(&musb->lock, flags); | |
227 | switch (musb->xceiv->state) { | |
228 | case OTG_STATE_A_WAIT_BCON: | |
229 | devctl &= ~MUSB_DEVCTL_SESSION; | |
230 | dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
231 | ||
232 | devctl = dsps_readb(musb->mregs, MUSB_DEVCTL); | |
233 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
234 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
235 | MUSB_DEV_MODE(musb); | |
236 | } else { | |
237 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
238 | MUSB_HST_MODE(musb); | |
239 | } | |
240 | break; | |
241 | case OTG_STATE_A_WAIT_VFALL: | |
242 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
243 | dsps_writel(musb->ctrl_base, wrp->coreintr_set, | |
244 | MUSB_INTR_VBUSERROR << wrp->usb_shift); | |
245 | break; | |
246 | case OTG_STATE_B_IDLE: | |
9ecb8875 AKG |
247 | devctl = dsps_readb(mregs, MUSB_DEVCTL); |
248 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
db4a9320 | 249 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
250 | jiffies + wrp->poll_seconds * HZ); |
251 | else | |
252 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
253 | break; | |
254 | default: | |
255 | break; | |
256 | } | |
257 | spin_unlock_irqrestore(&musb->lock, flags); | |
258 | } | |
259 | ||
260 | static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) | |
261 | { | |
262 | struct device *dev = musb->controller; | |
db4a9320 R |
263 | struct platform_device *pdev = to_platform_device(dev); |
264 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
265 | |
266 | if (timeout == 0) | |
267 | timeout = jiffies + msecs_to_jiffies(3); | |
268 | ||
269 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
270 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
271 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
272 | dev_dbg(musb->controller, "%s active, deleting timer\n", | |
42c0bf1c | 273 | usb_otg_state_string(musb->xceiv->state)); |
db4a9320 R |
274 | del_timer(&glue->timer[pdev->id]); |
275 | glue->last_timer[pdev->id] = jiffies; | |
9ecb8875 AKG |
276 | return; |
277 | } | |
278 | ||
db4a9320 R |
279 | if (time_after(glue->last_timer[pdev->id], timeout) && |
280 | timer_pending(&glue->timer[pdev->id])) { | |
9ecb8875 AKG |
281 | dev_dbg(musb->controller, |
282 | "Longer idle timer already pending, ignoring...\n"); | |
283 | return; | |
284 | } | |
db4a9320 | 285 | glue->last_timer[pdev->id] = timeout; |
9ecb8875 AKG |
286 | |
287 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", | |
42c0bf1c | 288 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 | 289 | jiffies_to_msecs(timeout - jiffies)); |
db4a9320 | 290 | mod_timer(&glue->timer[pdev->id], timeout); |
9ecb8875 AKG |
291 | } |
292 | ||
293 | static irqreturn_t dsps_interrupt(int irq, void *hci) | |
294 | { | |
295 | struct musb *musb = hci; | |
296 | void __iomem *reg_base = musb->ctrl_base; | |
297 | struct device *dev = musb->controller; | |
db4a9320 R |
298 | struct platform_device *pdev = to_platform_device(dev); |
299 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 AKG |
300 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
301 | unsigned long flags; | |
302 | irqreturn_t ret = IRQ_NONE; | |
303 | u32 epintr, usbintr; | |
304 | ||
305 | spin_lock_irqsave(&musb->lock, flags); | |
306 | ||
307 | /* Get endpoint interrupts */ | |
308 | epintr = dsps_readl(reg_base, wrp->epintr_status); | |
309 | musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; | |
310 | musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; | |
311 | ||
312 | if (epintr) | |
313 | dsps_writel(reg_base, wrp->epintr_status, epintr); | |
314 | ||
315 | /* Get usb core interrupts */ | |
316 | usbintr = dsps_readl(reg_base, wrp->coreintr_status); | |
317 | if (!usbintr && !epintr) | |
9be73bae | 318 | goto out; |
9ecb8875 AKG |
319 | |
320 | musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; | |
321 | if (usbintr) | |
322 | dsps_writel(reg_base, wrp->coreintr_status, usbintr); | |
323 | ||
324 | dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", | |
325 | usbintr, epintr); | |
326 | /* | |
327 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
328 | * DSPS IP's missing ID change IRQ. We need an ID change IRQ to | |
329 | * switch appropriately between halves of the OTG state machine. | |
330 | * Managing DEVCTL.SESSION per Mentor docs requires that we know its | |
331 | * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. | |
332 | * Also, DRVVBUS pulses for SRP (but not at 5V) ... | |
333 | */ | |
96449f09 | 334 | if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) |
984e833c | 335 | pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); |
9ecb8875 AKG |
336 | |
337 | if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { | |
338 | int drvvbus = dsps_readl(reg_base, wrp->status); | |
339 | void __iomem *mregs = musb->mregs; | |
340 | u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); | |
341 | int err; | |
342 | ||
032ec49f | 343 | err = musb->int_usb & MUSB_INTR_VBUSERROR; |
9ecb8875 AKG |
344 | if (err) { |
345 | /* | |
346 | * The Mentor core doesn't debounce VBUS as needed | |
347 | * to cope with device connect current spikes. This | |
348 | * means it's not uncommon for bus-powered devices | |
349 | * to get VBUS errors during enumeration. | |
350 | * | |
351 | * This is a workaround, but newer RTL from Mentor | |
352 | * seems to allow a better one: "re"-starting sessions | |
353 | * without waiting for VBUS to stop registering in | |
354 | * devctl. | |
355 | */ | |
356 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
357 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
db4a9320 | 358 | mod_timer(&glue->timer[pdev->id], |
9ecb8875 AKG |
359 | jiffies + wrp->poll_seconds * HZ); |
360 | WARNING("VBUS error workaround (delay coming)\n"); | |
032ec49f | 361 | } else if (drvvbus) { |
9ecb8875 AKG |
362 | musb->is_active = 1; |
363 | MUSB_HST_MODE(musb); | |
364 | musb->xceiv->otg->default_a = 1; | |
365 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
db4a9320 | 366 | del_timer(&glue->timer[pdev->id]); |
9ecb8875 AKG |
367 | } else { |
368 | musb->is_active = 0; | |
369 | MUSB_DEV_MODE(musb); | |
370 | musb->xceiv->otg->default_a = 0; | |
371 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
372 | } | |
373 | ||
374 | /* NOTE: this must complete power-on within 100 ms. */ | |
375 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", | |
376 | drvvbus ? "on" : "off", | |
42c0bf1c | 377 | usb_otg_state_string(musb->xceiv->state), |
9ecb8875 AKG |
378 | err ? " ERROR" : "", |
379 | devctl); | |
380 | ret = IRQ_HANDLED; | |
381 | } | |
382 | ||
383 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
384 | ret |= musb_interrupt(musb); | |
385 | ||
9ecb8875 | 386 | /* Poll for ID change */ |
032ec49f | 387 | if (musb->xceiv->state == OTG_STATE_B_IDLE) |
db4a9320 R |
388 | mod_timer(&glue->timer[pdev->id], |
389 | jiffies + wrp->poll_seconds * HZ); | |
9be73bae | 390 | out: |
9ecb8875 AKG |
391 | spin_unlock_irqrestore(&musb->lock, flags); |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
396 | static int dsps_musb_init(struct musb *musb) | |
397 | { | |
398 | struct device *dev = musb->controller; | |
db4a9320 R |
399 | struct platform_device *pdev = to_platform_device(dev); |
400 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 401 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
9ecb8875 AKG |
402 | void __iomem *reg_base = musb->ctrl_base; |
403 | u32 rev, val; | |
404 | int status; | |
405 | ||
406 | /* mentor core register starts at offset of 0x400 from musb base */ | |
407 | musb->mregs += wrp->musb_core_offset; | |
408 | ||
d7554226 AM |
409 | /* NOP driver needs change if supporting dual instance */ |
410 | usb_nop_xceiv_register(); | |
662dca54 | 411 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
ded017ee | 412 | if (IS_ERR_OR_NULL(musb->xceiv)) |
25736e0c | 413 | return -EPROBE_DEFER; |
9ecb8875 AKG |
414 | |
415 | /* Returns zero if e.g. not clocked */ | |
416 | rev = dsps_readl(reg_base, wrp->revision); | |
417 | if (!rev) { | |
418 | status = -ENODEV; | |
419 | goto err0; | |
420 | } | |
421 | ||
7557a57f SAS |
422 | usb_phy_init(musb->xceiv); |
423 | ||
db4a9320 | 424 | setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb); |
9ecb8875 AKG |
425 | |
426 | /* Reset the musb */ | |
427 | dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); | |
428 | ||
429 | /* Start the on-chip PHY and its PLL. */ | |
c68bb4c6 | 430 | musb_dsps_phy_control(glue, pdev->id, 1); |
9ecb8875 AKG |
431 | |
432 | musb->isr = dsps_interrupt; | |
433 | ||
434 | /* reset the otgdisable bit, needed for host mode to work */ | |
435 | val = dsps_readl(reg_base, wrp->phy_utmi); | |
436 | val &= ~(1 << wrp->otg_disable); | |
437 | dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); | |
438 | ||
9ecb8875 AKG |
439 | return 0; |
440 | err0: | |
721002ec | 441 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
442 | usb_nop_xceiv_unregister(); |
443 | return status; | |
444 | } | |
445 | ||
446 | static int dsps_musb_exit(struct musb *musb) | |
447 | { | |
448 | struct device *dev = musb->controller; | |
db4a9320 R |
449 | struct platform_device *pdev = to_platform_device(dev); |
450 | struct dsps_glue *glue = dev_get_drvdata(dev->parent); | |
9ecb8875 | 451 | |
db4a9320 | 452 | del_timer_sync(&glue->timer[pdev->id]); |
9ecb8875 AKG |
453 | |
454 | /* Shutdown the on-chip PHY and its PLL. */ | |
c68bb4c6 | 455 | musb_dsps_phy_control(glue, pdev->id, 0); |
7557a57f | 456 | usb_phy_shutdown(musb->xceiv); |
9ecb8875 AKG |
457 | |
458 | /* NOP driver needs change if supporting dual instance */ | |
721002ec | 459 | usb_put_phy(musb->xceiv); |
9ecb8875 AKG |
460 | usb_nop_xceiv_unregister(); |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | static struct musb_platform_ops dsps_ops = { | |
466 | .init = dsps_musb_init, | |
467 | .exit = dsps_musb_exit, | |
468 | ||
469 | .enable = dsps_musb_enable, | |
470 | .disable = dsps_musb_disable, | |
471 | ||
472 | .try_idle = dsps_musb_try_idle, | |
473 | }; | |
474 | ||
475 | static u64 musb_dmamask = DMA_BIT_MASK(32); | |
476 | ||
41ac7b3a | 477 | static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) |
9ecb8875 AKG |
478 | { |
479 | struct device *dev = glue->dev; | |
480 | struct platform_device *pdev = to_platform_device(dev); | |
c1a7d67c | 481 | struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev); |
65145677 AKG |
482 | struct device_node *np = pdev->dev.of_node; |
483 | struct musb_hdrc_config *config; | |
9ecb8875 AKG |
484 | struct platform_device *musb; |
485 | struct resource *res; | |
486 | struct resource resources[2]; | |
ca749b2a | 487 | char res_name[11]; |
2f771164 | 488 | int ret; |
9ecb8875 | 489 | |
c68bb4c6 SD |
490 | resources[0].start = dsps_control_module_phys[id]; |
491 | resources[0].end = resources[0].start + SZ_4 - 1; | |
492 | resources[0].flags = IORESOURCE_MEM; | |
493 | ||
148e1134 TR |
494 | glue->usb_ctrl[id] = devm_ioremap_resource(&pdev->dev, resources); |
495 | if (IS_ERR(glue->usb_ctrl[id])) { | |
496 | ret = PTR_ERR(glue->usb_ctrl[id]); | |
c68bb4c6 SD |
497 | goto err0; |
498 | } | |
499 | ||
3e594b18 AM |
500 | /* first resource is for usbss, so start index from 1 */ |
501 | res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1); | |
9ecb8875 | 502 | if (!res) { |
3e594b18 | 503 | dev_err(dev, "failed to get memory for instance %d\n", id); |
9ecb8875 AKG |
504 | ret = -ENODEV; |
505 | goto err0; | |
506 | } | |
507 | res->parent = NULL; | |
508 | resources[0] = *res; | |
509 | ||
3e594b18 AM |
510 | /* first resource is for usbss, so start index from 1 */ |
511 | res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1); | |
9ecb8875 | 512 | if (!res) { |
3e594b18 | 513 | dev_err(dev, "failed to get irq for instance %d\n", id); |
9ecb8875 AKG |
514 | ret = -ENODEV; |
515 | goto err0; | |
516 | } | |
9ecb8875 AKG |
517 | res->parent = NULL; |
518 | resources[1] = *res; | |
3bb55348 | 519 | resources[1].name = "mc"; |
9ecb8875 AKG |
520 | |
521 | /* allocate the child platform device */ | |
2f771164 | 522 | musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); |
9ecb8875 AKG |
523 | if (!musb) { |
524 | dev_err(dev, "failed to allocate musb device\n"); | |
525 | ret = -ENOMEM; | |
2f771164 | 526 | goto err0; |
9ecb8875 AKG |
527 | } |
528 | ||
529 | musb->dev.parent = dev; | |
530 | musb->dev.dma_mask = &musb_dmamask; | |
531 | musb->dev.coherent_dma_mask = musb_dmamask; | |
532 | ||
db4a9320 | 533 | glue->musb[id] = musb; |
9ecb8875 AKG |
534 | |
535 | ret = platform_device_add_resources(musb, resources, 2); | |
536 | if (ret) { | |
537 | dev_err(dev, "failed to add resources\n"); | |
65b3d52d | 538 | goto err2; |
9ecb8875 AKG |
539 | } |
540 | ||
65145677 AKG |
541 | if (np) { |
542 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
543 | if (!pdata) { | |
544 | dev_err(&pdev->dev, | |
8b513d0c | 545 | "failed to allocate musb platform data\n"); |
65145677 AKG |
546 | ret = -ENOMEM; |
547 | goto err2; | |
548 | } | |
549 | ||
550 | config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); | |
551 | if (!config) { | |
552 | dev_err(&pdev->dev, | |
553 | "failed to allocate musb hdrc config\n"); | |
b25e5f1c | 554 | ret = -ENOMEM; |
65145677 AKG |
555 | goto err2; |
556 | } | |
557 | ||
558 | of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps); | |
559 | of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits); | |
ca749b2a | 560 | snprintf(res_name, sizeof(res_name), "port%d-mode", id); |
65145677 AKG |
561 | of_property_read_u32(np, res_name, (u32 *)&pdata->mode); |
562 | of_property_read_u32(np, "power", (u32 *)&pdata->power); | |
563 | config->multipoint = of_property_read_bool(np, "multipoint"); | |
564 | ||
565 | pdata->config = config; | |
566 | } | |
567 | ||
568 | pdata->platform_ops = &dsps_ops; | |
569 | ||
9ecb8875 AKG |
570 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); |
571 | if (ret) { | |
572 | dev_err(dev, "failed to add platform_data\n"); | |
65b3d52d | 573 | goto err2; |
9ecb8875 AKG |
574 | } |
575 | ||
576 | ret = platform_device_add(musb); | |
577 | if (ret) { | |
578 | dev_err(dev, "failed to register musb device\n"); | |
65b3d52d | 579 | goto err2; |
9ecb8875 AKG |
580 | } |
581 | ||
582 | return 0; | |
583 | ||
65b3d52d | 584 | err2: |
9ecb8875 AKG |
585 | platform_device_put(musb); |
586 | err0: | |
587 | return ret; | |
588 | } | |
589 | ||
41ac7b3a | 590 | static int dsps_probe(struct platform_device *pdev) |
9ecb8875 | 591 | { |
65145677 AKG |
592 | const struct of_device_id *match; |
593 | const struct dsps_musb_wrapper *wrp; | |
9ecb8875 AKG |
594 | struct dsps_glue *glue; |
595 | struct resource *iomem; | |
db4a9320 | 596 | int ret, i; |
9ecb8875 | 597 | |
cc506036 | 598 | match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); |
65145677 AKG |
599 | if (!match) { |
600 | dev_err(&pdev->dev, "fail to get matching of_match struct\n"); | |
601 | ret = -EINVAL; | |
602 | goto err0; | |
603 | } | |
604 | wrp = match->data; | |
9ecb8875 AKG |
605 | |
606 | /* allocate glue */ | |
607 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); | |
608 | if (!glue) { | |
609 | dev_err(&pdev->dev, "unable to allocate glue memory\n"); | |
610 | ret = -ENOMEM; | |
611 | goto err0; | |
612 | } | |
613 | ||
614 | /* get memory resource */ | |
615 | iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
616 | if (!iomem) { | |
617 | dev_err(&pdev->dev, "failed to get usbss mem resourse\n"); | |
618 | ret = -ENODEV; | |
619 | goto err1; | |
620 | } | |
621 | ||
622 | glue->dev = &pdev->dev; | |
623 | ||
624 | glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL); | |
625 | if (!glue->wrp) { | |
626 | dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n"); | |
627 | ret = -ENOMEM; | |
628 | goto err1; | |
629 | } | |
630 | platform_set_drvdata(pdev, glue); | |
631 | ||
9ecb8875 AKG |
632 | /* enable the usbss clocks */ |
633 | pm_runtime_enable(&pdev->dev); | |
634 | ||
635 | ret = pm_runtime_get_sync(&pdev->dev); | |
636 | if (ret < 0) { | |
637 | dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); | |
0e38c4ed AKG |
638 | goto err2; |
639 | } | |
640 | ||
db4a9320 R |
641 | /* create the child platform device for all instances of musb */ |
642 | for (i = 0; i < wrp->instances ; i++) { | |
643 | ret = dsps_create_musb_pdev(glue, i); | |
644 | if (ret != 0) { | |
645 | dev_err(&pdev->dev, "failed to create child pdev\n"); | |
646 | /* release resources of previously created instances */ | |
647 | for (i--; i >= 0 ; i--) | |
2f771164 | 648 | platform_device_unregister(glue->musb[i]); |
db4a9320 R |
649 | goto err3; |
650 | } | |
9ecb8875 AKG |
651 | } |
652 | ||
653 | return 0; | |
654 | ||
655 | err3: | |
0e38c4ed | 656 | pm_runtime_put(&pdev->dev); |
9ecb8875 | 657 | err2: |
0e38c4ed | 658 | pm_runtime_disable(&pdev->dev); |
9ecb8875 AKG |
659 | kfree(glue->wrp); |
660 | err1: | |
661 | kfree(glue); | |
662 | err0: | |
663 | return ret; | |
664 | } | |
fb4e98ab | 665 | static int dsps_remove(struct platform_device *pdev) |
9ecb8875 AKG |
666 | { |
667 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
db4a9320 R |
668 | const struct dsps_musb_wrapper *wrp = glue->wrp; |
669 | int i; | |
9ecb8875 AKG |
670 | |
671 | /* delete the child platform device */ | |
db4a9320 | 672 | for (i = 0; i < wrp->instances ; i++) |
2f771164 | 673 | platform_device_unregister(glue->musb[i]); |
9ecb8875 AKG |
674 | |
675 | /* disable usbss clocks */ | |
676 | pm_runtime_put(&pdev->dev); | |
677 | pm_runtime_disable(&pdev->dev); | |
678 | kfree(glue->wrp); | |
679 | kfree(glue); | |
680 | return 0; | |
681 | } | |
682 | ||
683 | #ifdef CONFIG_PM_SLEEP | |
684 | static int dsps_suspend(struct device *dev) | |
685 | { | |
c68bb4c6 SD |
686 | struct platform_device *pdev = to_platform_device(dev->parent); |
687 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
688 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
689 | int i; | |
9ecb8875 | 690 | |
c68bb4c6 SD |
691 | for (i = 0; i < wrp->instances; i++) |
692 | musb_dsps_phy_control(glue, i, 0); | |
9ecb8875 AKG |
693 | |
694 | return 0; | |
695 | } | |
696 | ||
697 | static int dsps_resume(struct device *dev) | |
698 | { | |
c68bb4c6 SD |
699 | struct platform_device *pdev = to_platform_device(dev->parent); |
700 | struct dsps_glue *glue = platform_get_drvdata(pdev); | |
701 | const struct dsps_musb_wrapper *wrp = glue->wrp; | |
702 | int i; | |
9ecb8875 | 703 | |
c68bb4c6 SD |
704 | for (i = 0; i < wrp->instances; i++) |
705 | musb_dsps_phy_control(glue, i, 1); | |
9ecb8875 AKG |
706 | |
707 | return 0; | |
708 | } | |
709 | #endif | |
710 | ||
711 | static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); | |
712 | ||
fa7b4ca5 | 713 | static const struct dsps_musb_wrapper am33xx_driver_data = { |
9ecb8875 AKG |
714 | .revision = 0x00, |
715 | .control = 0x14, | |
716 | .status = 0x18, | |
9ecb8875 AKG |
717 | .epintr_set = 0x38, |
718 | .epintr_clear = 0x40, | |
719 | .epintr_status = 0x30, | |
720 | .coreintr_set = 0x3c, | |
721 | .coreintr_clear = 0x44, | |
722 | .coreintr_status = 0x34, | |
723 | .phy_utmi = 0xe0, | |
724 | .mode = 0xe8, | |
725 | .reset = 0, | |
726 | .otg_disable = 21, | |
727 | .iddig = 8, | |
728 | .usb_shift = 0, | |
729 | .usb_mask = 0x1ff, | |
730 | .usb_bitmap = (0x1ff << 0), | |
731 | .drvvbus = 8, | |
732 | .txep_shift = 0, | |
733 | .txep_mask = 0xffff, | |
734 | .txep_bitmap = (0xffff << 0), | |
735 | .rxep_shift = 16, | |
736 | .rxep_mask = 0xfffe, | |
737 | .rxep_bitmap = (0xfffe << 16), | |
738 | .musb_core_offset = 0x400, | |
739 | .poll_seconds = 2, | |
3b46dd76 | 740 | .instances = 1, |
9ecb8875 AKG |
741 | }; |
742 | ||
2f82686e | 743 | static const struct of_device_id musb_dsps_of_match[] = { |
65145677 | 744 | { .compatible = "ti,musb-am33xx", |
fa7b4ca5 | 745 | .data = (void *) &am33xx_driver_data, }, |
9ecb8875 AKG |
746 | { }, |
747 | }; | |
748 | MODULE_DEVICE_TABLE(of, musb_dsps_of_match); | |
749 | ||
750 | static struct platform_driver dsps_usbss_driver = { | |
751 | .probe = dsps_probe, | |
7690417d | 752 | .remove = dsps_remove, |
9ecb8875 AKG |
753 | .driver = { |
754 | .name = "musb-dsps", | |
755 | .pm = &dsps_pm_ops, | |
65145677 | 756 | .of_match_table = of_match_ptr(musb_dsps_of_match), |
9ecb8875 | 757 | }, |
9ecb8875 AKG |
758 | }; |
759 | ||
760 | MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); | |
761 | MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); | |
762 | MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); | |
763 | MODULE_LICENSE("GPL v2"); | |
764 | ||
765 | static int __init dsps_init(void) | |
766 | { | |
767 | return platform_driver_register(&dsps_usbss_driver); | |
768 | } | |
769 | subsys_initcall(dsps_init); | |
770 | ||
771 | static void __exit dsps_exit(void) | |
772 | { | |
773 | platform_driver_unregister(&dsps_usbss_driver); | |
774 | } | |
775 | module_exit(dsps_exit); |