blob: 80e2b03965c878158ade372d79a955a8c35cf7f4 [file] [log] [blame]
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +05301/*
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>
Ajay Kumar Gupta65145672012-08-31 11:09:53 +000034#include <linux/of.h>
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +053035#include <linux/err.h>
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053036#include <linux/platform_device.h>
37#include <linux/dma-mapping.h>
38#include <linux/pm_runtime.h>
39#include <linux/module.h>
Felipe Balbi78c289f2012-07-19 13:32:15 +030040#include <linux/usb/nop-usb-xceiv.h>
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053041
42#include <linux/of.h>
43#include <linux/of_device.h>
44#include <linux/of_address.h>
45
46#include <plat/usb.h>
47
48#include "musb_core.h"
49
Ajay Kumar Gupta65145672012-08-31 11:09:53 +000050#ifdef CONFIG_OF
51static const struct of_device_id musb_dsps_of_match[];
52#endif
53
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053054/**
55 * avoid using musb_readx()/musb_writex() as glue layer should not be
56 * dependent on musb core layer symbols.
57 */
58static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
59 { return __raw_readb(addr + offset); }
60
61static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
62 { return __raw_readl(addr + offset); }
63
64static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
65 { __raw_writeb(data, addr + offset); }
66
67static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
68 { __raw_writel(data, addr + offset); }
69
70/**
71 * DSPS musb wrapper register offset.
72 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
73 * musb ips.
74 */
75struct dsps_musb_wrapper {
76 u16 revision;
77 u16 control;
78 u16 status;
79 u16 eoi;
80 u16 epintr_set;
81 u16 epintr_clear;
82 u16 epintr_status;
83 u16 coreintr_set;
84 u16 coreintr_clear;
85 u16 coreintr_status;
86 u16 phy_utmi;
87 u16 mode;
88
89 /* bit positions for control */
90 unsigned reset:5;
91
92 /* bit positions for interrupt */
93 unsigned usb_shift:5;
94 u32 usb_mask;
95 u32 usb_bitmap;
96 unsigned drvvbus:5;
97
98 unsigned txep_shift:5;
99 u32 txep_mask;
100 u32 txep_bitmap;
101
102 unsigned rxep_shift:5;
103 u32 rxep_mask;
104 u32 rxep_bitmap;
105
106 /* bit positions for phy_utmi */
107 unsigned otg_disable:5;
108
109 /* bit positions for mode */
110 unsigned iddig:5;
111 /* miscellaneous stuff */
112 u32 musb_core_offset;
113 u8 poll_seconds;
B, Ravidb4a9322012-08-31 11:09:51 +0000114 /* number of musb instances */
115 u8 instances;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530116};
117
118/**
119 * DSPS glue structure.
120 */
121struct dsps_glue {
122 struct device *dev;
B, Ravidb4a9322012-08-31 11:09:51 +0000123 struct platform_device *musb[2]; /* child musb pdev */
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530124 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
B, Ravidb4a9322012-08-31 11:09:51 +0000125 struct timer_list timer[2]; /* otg_workaround timer */
126 unsigned long last_timer[2]; /* last timer data for each instance */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530127 u32 __iomem *usb_ctrl[2];
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530128};
129
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530130#define DSPS_AM33XX_CONTROL_MODULE_PHYS_0 0x44e10620
131#define DSPS_AM33XX_CONTROL_MODULE_PHYS_1 0x44e10628
132
133static const resource_size_t dsps_control_module_phys[] = {
134 DSPS_AM33XX_CONTROL_MODULE_PHYS_0,
135 DSPS_AM33XX_CONTROL_MODULE_PHYS_1,
136};
137
138/**
139 * musb_dsps_phy_control - phy on/off
140 * @glue: struct dsps_glue *
141 * @id: musb instance
142 * @on: flag for phy to be switched on or off
143 *
144 * This is to enable the PHY using usb_ctrl register in system control
145 * module space.
146 *
147 * XXX: This function will be removed once we have a seperate driver for
148 * control module
149 */
150static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on)
151{
152 u32 usbphycfg;
153
154 usbphycfg = readl(glue->usb_ctrl[id]);
155
156 if (on) {
157 usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
158 usbphycfg |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
159 } else {
160 usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
161 }
162
163 writel(usbphycfg, glue->usb_ctrl[id]);
164}
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530165/**
166 * dsps_musb_enable - enable interrupts
167 */
168static void dsps_musb_enable(struct musb *musb)
169{
170 struct device *dev = musb->controller;
171 struct platform_device *pdev = to_platform_device(dev->parent);
172 struct dsps_glue *glue = platform_get_drvdata(pdev);
173 const struct dsps_musb_wrapper *wrp = glue->wrp;
174 void __iomem *reg_base = musb->ctrl_base;
175 u32 epmask, coremask;
176
177 /* Workaround: setup IRQs through both register sets. */
178 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
179 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
180 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
181
182 dsps_writel(reg_base, wrp->epintr_set, epmask);
183 dsps_writel(reg_base, wrp->coreintr_set, coremask);
184 /* Force the DRVVBUS IRQ so we can start polling for ID change. */
Felipe Balbi032ec492011-11-24 15:46:26 +0200185 dsps_writel(reg_base, wrp->coreintr_set,
186 (1 << wrp->drvvbus) << wrp->usb_shift);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530187}
188
189/**
190 * dsps_musb_disable - disable HDRC and flush interrupts
191 */
192static void dsps_musb_disable(struct musb *musb)
193{
194 struct device *dev = musb->controller;
195 struct platform_device *pdev = to_platform_device(dev->parent);
196 struct dsps_glue *glue = platform_get_drvdata(pdev);
197 const struct dsps_musb_wrapper *wrp = glue->wrp;
198 void __iomem *reg_base = musb->ctrl_base;
199
200 dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
201 dsps_writel(reg_base, wrp->epintr_clear,
202 wrp->txep_bitmap | wrp->rxep_bitmap);
203 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
204 dsps_writel(reg_base, wrp->eoi, 0);
205}
206
207static 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;
B, Ravidb4a9322012-08-31 11:09:51 +0000212 struct platform_device *pdev = to_platform_device(dev);
213 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530214 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,
224 otg_state_string(musb->xceiv->state));
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:
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530247 devctl = dsps_readb(mregs, MUSB_DEVCTL);
248 if (devctl & MUSB_DEVCTL_BDEVICE)
B, Ravidb4a9322012-08-31 11:09:51 +0000249 mod_timer(&glue->timer[pdev->id],
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530250 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
260static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
261{
262 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000263 struct platform_device *pdev = to_platform_device(dev);
264 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530265
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",
273 otg_state_string(musb->xceiv->state));
B, Ravidb4a9322012-08-31 11:09:51 +0000274 del_timer(&glue->timer[pdev->id]);
275 glue->last_timer[pdev->id] = jiffies;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530276 return;
277 }
278
B, Ravidb4a9322012-08-31 11:09:51 +0000279 if (time_after(glue->last_timer[pdev->id], timeout) &&
280 timer_pending(&glue->timer[pdev->id])) {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530281 dev_dbg(musb->controller,
282 "Longer idle timer already pending, ignoring...\n");
283 return;
284 }
B, Ravidb4a9322012-08-31 11:09:51 +0000285 glue->last_timer[pdev->id] = timeout;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530286
287 dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
288 otg_state_string(musb->xceiv->state),
289 jiffies_to_msecs(timeout - jiffies));
B, Ravidb4a9322012-08-31 11:09:51 +0000290 mod_timer(&glue->timer[pdev->id], timeout);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530291}
292
293static 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;
B, Ravidb4a9322012-08-31 11:09:51 +0000298 struct platform_device *pdev = to_platform_device(dev);
299 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530300 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)
318 goto eoi;
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 */
Felipe Balbi032ec492011-11-24 15:46:26 +0200334 if (usbintr & MUSB_INTR_BABBLE)
Masanari Iida984e8332012-11-01 00:03:51 +0900335 pr_info("CAUTION: musb: Babble Interrupt Occurred\n");
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530336
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
Felipe Balbi032ec492011-11-24 15:46:26 +0200343 err = musb->int_usb & MUSB_INTR_VBUSERROR;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530344 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;
B, Ravidb4a9322012-08-31 11:09:51 +0000358 mod_timer(&glue->timer[pdev->id],
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530359 jiffies + wrp->poll_seconds * HZ);
360 WARNING("VBUS error workaround (delay coming)\n");
Felipe Balbi032ec492011-11-24 15:46:26 +0200361 } else if (drvvbus) {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530362 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;
B, Ravidb4a9322012-08-31 11:09:51 +0000366 del_timer(&glue->timer[pdev->id]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530367 } 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",
377 otg_state_string(musb->xceiv->state),
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
386 eoi:
387 /* EOI needs to be written for the IRQ to be re-asserted. */
388 if (ret == IRQ_HANDLED || epintr || usbintr)
389 dsps_writel(reg_base, wrp->eoi, 1);
390
391 /* Poll for ID change */
Felipe Balbi032ec492011-11-24 15:46:26 +0200392 if (musb->xceiv->state == OTG_STATE_B_IDLE)
B, Ravidb4a9322012-08-31 11:09:51 +0000393 mod_timer(&glue->timer[pdev->id],
394 jiffies + wrp->poll_seconds * HZ);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530395
396 spin_unlock_irqrestore(&musb->lock, flags);
397
398 return ret;
399}
400
401static int dsps_musb_init(struct musb *musb)
402{
403 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000404 struct platform_device *pdev = to_platform_device(dev);
405 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530406 const struct dsps_musb_wrapper *wrp = glue->wrp;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530407 void __iomem *reg_base = musb->ctrl_base;
408 u32 rev, val;
409 int status;
410
411 /* mentor core register starts at offset of 0x400 from musb base */
412 musb->mregs += wrp->musb_core_offset;
413
Afzal Mohammedd7554222012-11-06 20:47:24 +0530414 /* NOP driver needs change if supporting dual instance */
415 usb_nop_xceiv_register();
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +0530416 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +0530417 if (IS_ERR_OR_NULL(musb->xceiv))
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530418 return -ENODEV;
419
420 /* Returns zero if e.g. not clocked */
421 rev = dsps_readl(reg_base, wrp->revision);
422 if (!rev) {
423 status = -ENODEV;
424 goto err0;
425 }
426
B, Ravidb4a9322012-08-31 11:09:51 +0000427 setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530428
429 /* Reset the musb */
430 dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
431
432 /* Start the on-chip PHY and its PLL. */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530433 musb_dsps_phy_control(glue, pdev->id, 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530434
435 musb->isr = dsps_interrupt;
436
437 /* reset the otgdisable bit, needed for host mode to work */
438 val = dsps_readl(reg_base, wrp->phy_utmi);
439 val &= ~(1 << wrp->otg_disable);
440 dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
441
442 /* clear level interrupt */
443 dsps_writel(reg_base, wrp->eoi, 0);
444
445 return 0;
446err0:
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530447 usb_put_phy(musb->xceiv);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530448 usb_nop_xceiv_unregister();
449 return status;
450}
451
452static int dsps_musb_exit(struct musb *musb)
453{
454 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000455 struct platform_device *pdev = to_platform_device(dev);
456 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530457
B, Ravidb4a9322012-08-31 11:09:51 +0000458 del_timer_sync(&glue->timer[pdev->id]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530459
460 /* Shutdown the on-chip PHY and its PLL. */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530461 musb_dsps_phy_control(glue, pdev->id, 0);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530462
463 /* NOP driver needs change if supporting dual instance */
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530464 usb_put_phy(musb->xceiv);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530465 usb_nop_xceiv_unregister();
466
467 return 0;
468}
469
470static struct musb_platform_ops dsps_ops = {
471 .init = dsps_musb_init,
472 .exit = dsps_musb_exit,
473
474 .enable = dsps_musb_enable,
475 .disable = dsps_musb_disable,
476
477 .try_idle = dsps_musb_try_idle,
478};
479
480static u64 musb_dmamask = DMA_BIT_MASK(32);
481
482static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
483{
484 struct device *dev = glue->dev;
485 struct platform_device *pdev = to_platform_device(dev);
486 struct musb_hdrc_platform_data *pdata = dev->platform_data;
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000487 struct device_node *np = pdev->dev.of_node;
488 struct musb_hdrc_config *config;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530489 struct platform_device *musb;
490 struct resource *res;
491 struct resource resources[2];
Daniel Mackca749b22012-10-17 22:17:35 +0200492 char res_name[11];
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100493 int ret;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530494
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530495 resources[0].start = dsps_control_module_phys[id];
496 resources[0].end = resources[0].start + SZ_4 - 1;
497 resources[0].flags = IORESOURCE_MEM;
498
499 glue->usb_ctrl[id] = devm_request_and_ioremap(&pdev->dev, resources);
500 if (glue->usb_ctrl[id] == NULL) {
501 dev_err(dev, "Failed to obtain usb_ctrl%d memory\n", id);
502 ret = -ENODEV;
503 goto err0;
504 }
505
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530506 /* first resource is for usbss, so start index from 1 */
507 res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530508 if (!res) {
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530509 dev_err(dev, "failed to get memory for instance %d\n", id);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530510 ret = -ENODEV;
511 goto err0;
512 }
513 res->parent = NULL;
514 resources[0] = *res;
515
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530516 /* first resource is for usbss, so start index from 1 */
517 res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530518 if (!res) {
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530519 dev_err(dev, "failed to get irq for instance %d\n", id);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530520 ret = -ENODEV;
521 goto err0;
522 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530523 res->parent = NULL;
524 resources[1] = *res;
Ajay Kumar Gupta3bb55342012-07-03 17:37:10 +0530525 resources[1].name = "mc";
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530526
B, Ravi65b3d522012-08-31 11:09:49 +0000527 /* allocate the child platform device */
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100528 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
B, Ravi65b3d522012-08-31 11:09:49 +0000529 if (!musb) {
530 dev_err(dev, "failed to allocate musb device\n");
531 ret = -ENOMEM;
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100532 goto err0;
B, Ravi65b3d522012-08-31 11:09:49 +0000533 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530534
535 musb->dev.parent = dev;
536 musb->dev.dma_mask = &musb_dmamask;
537 musb->dev.coherent_dma_mask = musb_dmamask;
538
B, Ravidb4a9322012-08-31 11:09:51 +0000539 glue->musb[id] = musb;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530540
541 ret = platform_device_add_resources(musb, resources, 2);
542 if (ret) {
543 dev_err(dev, "failed to add resources\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000544 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530545 }
546
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000547 if (np) {
548 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
549 if (!pdata) {
550 dev_err(&pdev->dev,
551 "failed to allocate musb platfrom data\n");
552 ret = -ENOMEM;
553 goto err2;
554 }
555
556 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
557 if (!config) {
558 dev_err(&pdev->dev,
559 "failed to allocate musb hdrc config\n");
560 goto err2;
561 }
562
563 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
564 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
Daniel Mackca749b22012-10-17 22:17:35 +0200565 snprintf(res_name, sizeof(res_name), "port%d-mode", id);
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000566 of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
567 of_property_read_u32(np, "power", (u32 *)&pdata->power);
568 config->multipoint = of_property_read_bool(np, "multipoint");
569
570 pdata->config = config;
571 }
572
573 pdata->platform_ops = &dsps_ops;
574
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530575 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
576 if (ret) {
577 dev_err(dev, "failed to add platform_data\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000578 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530579 }
580
581 ret = platform_device_add(musb);
582 if (ret) {
583 dev_err(dev, "failed to register musb device\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000584 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530585 }
586
587 return 0;
588
B, Ravi65b3d522012-08-31 11:09:49 +0000589err2:
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530590 platform_device_put(musb);
591err0:
592 return ret;
593}
594
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530595static int __devinit dsps_probe(struct platform_device *pdev)
596{
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000597 struct device_node *np = pdev->dev.of_node;
598 const struct of_device_id *match;
599 const struct dsps_musb_wrapper *wrp;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530600 struct dsps_glue *glue;
601 struct resource *iomem;
B, Ravidb4a9322012-08-31 11:09:51 +0000602 int ret, i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530603
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000604 match = of_match_node(musb_dsps_of_match, np);
605 if (!match) {
606 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
607 ret = -EINVAL;
608 goto err0;
609 }
610 wrp = match->data;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530611
612 /* allocate glue */
613 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
614 if (!glue) {
615 dev_err(&pdev->dev, "unable to allocate glue memory\n");
616 ret = -ENOMEM;
617 goto err0;
618 }
619
620 /* get memory resource */
621 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
622 if (!iomem) {
623 dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
624 ret = -ENODEV;
625 goto err1;
626 }
627
628 glue->dev = &pdev->dev;
629
630 glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
631 if (!glue->wrp) {
632 dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
633 ret = -ENOMEM;
634 goto err1;
635 }
636 platform_set_drvdata(pdev, glue);
637
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530638 /* enable the usbss clocks */
639 pm_runtime_enable(&pdev->dev);
640
641 ret = pm_runtime_get_sync(&pdev->dev);
642 if (ret < 0) {
643 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530644 goto err2;
645 }
646
B, Ravidb4a9322012-08-31 11:09:51 +0000647 /* create the child platform device for all instances of musb */
648 for (i = 0; i < wrp->instances ; i++) {
649 ret = dsps_create_musb_pdev(glue, i);
650 if (ret != 0) {
651 dev_err(&pdev->dev, "failed to create child pdev\n");
652 /* release resources of previously created instances */
653 for (i--; i >= 0 ; i--)
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100654 platform_device_unregister(glue->musb[i]);
B, Ravidb4a9322012-08-31 11:09:51 +0000655 goto err3;
656 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530657 }
658
659 return 0;
660
661err3:
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530662 pm_runtime_put(&pdev->dev);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530663err2:
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530664 pm_runtime_disable(&pdev->dev);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530665 kfree(glue->wrp);
666err1:
667 kfree(glue);
668err0:
669 return ret;
670}
671static int __devexit dsps_remove(struct platform_device *pdev)
672{
673 struct dsps_glue *glue = platform_get_drvdata(pdev);
B, Ravidb4a9322012-08-31 11:09:51 +0000674 const struct dsps_musb_wrapper *wrp = glue->wrp;
675 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530676
677 /* delete the child platform device */
B, Ravidb4a9322012-08-31 11:09:51 +0000678 for (i = 0; i < wrp->instances ; i++)
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100679 platform_device_unregister(glue->musb[i]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530680
681 /* disable usbss clocks */
682 pm_runtime_put(&pdev->dev);
683 pm_runtime_disable(&pdev->dev);
684 kfree(glue->wrp);
685 kfree(glue);
686 return 0;
687}
688
689#ifdef CONFIG_PM_SLEEP
690static int dsps_suspend(struct device *dev)
691{
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530692 struct platform_device *pdev = to_platform_device(dev->parent);
693 struct dsps_glue *glue = platform_get_drvdata(pdev);
694 const struct dsps_musb_wrapper *wrp = glue->wrp;
695 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530696
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530697 for (i = 0; i < wrp->instances; i++)
698 musb_dsps_phy_control(glue, i, 0);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530699
700 return 0;
701}
702
703static int dsps_resume(struct device *dev)
704{
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530705 struct platform_device *pdev = to_platform_device(dev->parent);
706 struct dsps_glue *glue = platform_get_drvdata(pdev);
707 const struct dsps_musb_wrapper *wrp = glue->wrp;
708 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530709
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530710 for (i = 0; i < wrp->instances; i++)
711 musb_dsps_phy_control(glue, i, 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530712
713 return 0;
714}
715#endif
716
717static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
718
719static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = {
720 .revision = 0x00,
721 .control = 0x14,
722 .status = 0x18,
723 .eoi = 0x24,
724 .epintr_set = 0x38,
725 .epintr_clear = 0x40,
726 .epintr_status = 0x30,
727 .coreintr_set = 0x3c,
728 .coreintr_clear = 0x44,
729 .coreintr_status = 0x34,
730 .phy_utmi = 0xe0,
731 .mode = 0xe8,
732 .reset = 0,
733 .otg_disable = 21,
734 .iddig = 8,
735 .usb_shift = 0,
736 .usb_mask = 0x1ff,
737 .usb_bitmap = (0x1ff << 0),
738 .drvvbus = 8,
739 .txep_shift = 0,
740 .txep_mask = 0xffff,
741 .txep_bitmap = (0xffff << 0),
742 .rxep_shift = 16,
743 .rxep_mask = 0xfffe,
744 .rxep_bitmap = (0xfffe << 16),
745 .musb_core_offset = 0x400,
746 .poll_seconds = 2,
Afzal Mohammed3b46dd72012-11-02 22:02:35 +0530747 .instances = 1,
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530748};
749
750static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
751 {
752 .name = "musb-ti81xx",
753 .driver_data = (kernel_ulong_t) &ti81xx_driver_data,
754 },
755 { }, /* Terminating Entry */
756};
757MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
758
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000759#ifdef CONFIG_OF
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530760static const struct of_device_id musb_dsps_of_match[] __devinitconst = {
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000761 { .compatible = "ti,musb-am33xx",
762 .data = (void *) &ti81xx_driver_data, },
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530763 { },
764};
765MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000766#endif
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530767
768static struct platform_driver dsps_usbss_driver = {
769 .probe = dsps_probe,
Bill Pemberton76904172012-11-19 13:21:08 -0500770 .remove = dsps_remove,
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530771 .driver = {
772 .name = "musb-dsps",
773 .pm = &dsps_pm_ops,
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000774 .of_match_table = of_match_ptr(musb_dsps_of_match),
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530775 },
776 .id_table = musb_dsps_id_table,
777};
778
779MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
780MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
781MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
782MODULE_LICENSE("GPL v2");
783
784static int __init dsps_init(void)
785{
786 return platform_driver_register(&dsps_usbss_driver);
787}
788subsys_initcall(dsps_init);
789
790static void __exit dsps_exit(void)
791{
792 platform_driver_unregister(&dsps_usbss_driver);
793}
794module_exit(dsps_exit);