blob: 6bb89715b63703a22a96419f88711d7dde665e49 [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>
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +053034#include <linux/err.h>
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053035#include <linux/platform_device.h>
36#include <linux/dma-mapping.h>
37#include <linux/pm_runtime.h>
38#include <linux/module.h>
Felipe Balbi78c289f2012-07-19 13:32:15 +030039#include <linux/usb/nop-usb-xceiv.h>
Felipe Balbie8c4a7a2012-10-24 14:26:19 -070040#include <linux/platform_data/usb-omap.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
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053046#include "musb_core.h"
47
Ajay Kumar Gupta65145672012-08-31 11:09:53 +000048#ifdef CONFIG_OF
49static const struct of_device_id musb_dsps_of_match[];
50#endif
51
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +053052/**
53 * avoid using musb_readx()/musb_writex() as glue layer should not be
54 * dependent on musb core layer symbols.
55 */
56static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
57 { return __raw_readb(addr + offset); }
58
59static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
60 { return __raw_readl(addr + offset); }
61
62static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
63 { __raw_writeb(data, addr + offset); }
64
65static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
66 { __raw_writel(data, addr + offset); }
67
68/**
69 * DSPS musb wrapper register offset.
70 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
71 * musb ips.
72 */
73struct dsps_musb_wrapper {
74 u16 revision;
75 u16 control;
76 u16 status;
77 u16 eoi;
78 u16 epintr_set;
79 u16 epintr_clear;
80 u16 epintr_status;
81 u16 coreintr_set;
82 u16 coreintr_clear;
83 u16 coreintr_status;
84 u16 phy_utmi;
85 u16 mode;
86
87 /* bit positions for control */
88 unsigned reset:5;
89
90 /* bit positions for interrupt */
91 unsigned usb_shift:5;
92 u32 usb_mask;
93 u32 usb_bitmap;
94 unsigned drvvbus:5;
95
96 unsigned txep_shift:5;
97 u32 txep_mask;
98 u32 txep_bitmap;
99
100 unsigned rxep_shift:5;
101 u32 rxep_mask;
102 u32 rxep_bitmap;
103
104 /* bit positions for phy_utmi */
105 unsigned otg_disable:5;
106
107 /* bit positions for mode */
108 unsigned iddig:5;
109 /* miscellaneous stuff */
110 u32 musb_core_offset;
111 u8 poll_seconds;
B, Ravidb4a9322012-08-31 11:09:51 +0000112 /* number of musb instances */
113 u8 instances;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530114};
115
116/**
117 * DSPS glue structure.
118 */
119struct dsps_glue {
120 struct device *dev;
B, Ravidb4a9322012-08-31 11:09:51 +0000121 struct platform_device *musb[2]; /* child musb pdev */
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530122 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
B, Ravidb4a9322012-08-31 11:09:51 +0000123 struct timer_list timer[2]; /* otg_workaround timer */
124 unsigned long last_timer[2]; /* last timer data for each instance */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530125 u32 __iomem *usb_ctrl[2];
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530126};
127
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530128#define DSPS_AM33XX_CONTROL_MODULE_PHYS_0 0x44e10620
129#define DSPS_AM33XX_CONTROL_MODULE_PHYS_1 0x44e10628
130
131static const resource_size_t dsps_control_module_phys[] = {
132 DSPS_AM33XX_CONTROL_MODULE_PHYS_0,
133 DSPS_AM33XX_CONTROL_MODULE_PHYS_1,
134};
135
Afzal Mohammeddeeeb9e2012-11-27 20:15:22 +0530136#define USBPHY_CM_PWRDN (1 << 0)
137#define USBPHY_OTG_PWRDN (1 << 1)
138#define USBPHY_OTGVDET_EN (1 << 19)
139#define USBPHY_OTGSESSEND_EN (1 << 20)
140
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530141/**
142 * musb_dsps_phy_control - phy on/off
143 * @glue: struct dsps_glue *
144 * @id: musb instance
145 * @on: flag for phy to be switched on or off
146 *
147 * This is to enable the PHY using usb_ctrl register in system control
148 * module space.
149 *
150 * XXX: This function will be removed once we have a seperate driver for
151 * control module
152 */
153static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on)
154{
155 u32 usbphycfg;
156
157 usbphycfg = readl(glue->usb_ctrl[id]);
158
159 if (on) {
160 usbphycfg &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
161 usbphycfg |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
162 } else {
163 usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
164 }
165
166 writel(usbphycfg, glue->usb_ctrl[id]);
167}
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530168/**
169 * dsps_musb_enable - enable interrupts
170 */
171static void dsps_musb_enable(struct musb *musb)
172{
173 struct device *dev = musb->controller;
174 struct platform_device *pdev = to_platform_device(dev->parent);
175 struct dsps_glue *glue = platform_get_drvdata(pdev);
176 const struct dsps_musb_wrapper *wrp = glue->wrp;
177 void __iomem *reg_base = musb->ctrl_base;
178 u32 epmask, coremask;
179
180 /* Workaround: setup IRQs through both register sets. */
181 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
182 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
183 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
184
185 dsps_writel(reg_base, wrp->epintr_set, epmask);
186 dsps_writel(reg_base, wrp->coreintr_set, coremask);
187 /* Force the DRVVBUS IRQ so we can start polling for ID change. */
Felipe Balbi032ec492011-11-24 15:46:26 +0200188 dsps_writel(reg_base, wrp->coreintr_set,
189 (1 << wrp->drvvbus) << wrp->usb_shift);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530190}
191
192/**
193 * dsps_musb_disable - disable HDRC and flush interrupts
194 */
195static void dsps_musb_disable(struct musb *musb)
196{
197 struct device *dev = musb->controller;
198 struct platform_device *pdev = to_platform_device(dev->parent);
199 struct dsps_glue *glue = platform_get_drvdata(pdev);
200 const struct dsps_musb_wrapper *wrp = glue->wrp;
201 void __iomem *reg_base = musb->ctrl_base;
202
203 dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
204 dsps_writel(reg_base, wrp->epintr_clear,
205 wrp->txep_bitmap | wrp->rxep_bitmap);
206 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
207 dsps_writel(reg_base, wrp->eoi, 0);
208}
209
210static void otg_timer(unsigned long _musb)
211{
212 struct musb *musb = (void *)_musb;
213 void __iomem *mregs = musb->mregs;
214 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000215 struct platform_device *pdev = to_platform_device(dev);
216 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530217 const struct dsps_musb_wrapper *wrp = glue->wrp;
218 u8 devctl;
219 unsigned long flags;
220
221 /*
222 * We poll because DSPS IP's won't expose several OTG-critical
223 * status change events (from the transceiver) otherwise.
224 */
225 devctl = dsps_readb(mregs, MUSB_DEVCTL);
226 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
227 otg_state_string(musb->xceiv->state));
228
229 spin_lock_irqsave(&musb->lock, flags);
230 switch (musb->xceiv->state) {
231 case OTG_STATE_A_WAIT_BCON:
232 devctl &= ~MUSB_DEVCTL_SESSION;
233 dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);
234
235 devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
236 if (devctl & MUSB_DEVCTL_BDEVICE) {
237 musb->xceiv->state = OTG_STATE_B_IDLE;
238 MUSB_DEV_MODE(musb);
239 } else {
240 musb->xceiv->state = OTG_STATE_A_IDLE;
241 MUSB_HST_MODE(musb);
242 }
243 break;
244 case OTG_STATE_A_WAIT_VFALL:
245 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
246 dsps_writel(musb->ctrl_base, wrp->coreintr_set,
247 MUSB_INTR_VBUSERROR << wrp->usb_shift);
248 break;
249 case OTG_STATE_B_IDLE:
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530250 devctl = dsps_readb(mregs, MUSB_DEVCTL);
251 if (devctl & MUSB_DEVCTL_BDEVICE)
B, Ravidb4a9322012-08-31 11:09:51 +0000252 mod_timer(&glue->timer[pdev->id],
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530253 jiffies + wrp->poll_seconds * HZ);
254 else
255 musb->xceiv->state = OTG_STATE_A_IDLE;
256 break;
257 default:
258 break;
259 }
260 spin_unlock_irqrestore(&musb->lock, flags);
261}
262
263static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
264{
265 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000266 struct platform_device *pdev = to_platform_device(dev);
267 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530268
269 if (timeout == 0)
270 timeout = jiffies + msecs_to_jiffies(3);
271
272 /* Never idle if active, or when VBUS timeout is not set as host */
273 if (musb->is_active || (musb->a_wait_bcon == 0 &&
274 musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
275 dev_dbg(musb->controller, "%s active, deleting timer\n",
276 otg_state_string(musb->xceiv->state));
B, Ravidb4a9322012-08-31 11:09:51 +0000277 del_timer(&glue->timer[pdev->id]);
278 glue->last_timer[pdev->id] = jiffies;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530279 return;
280 }
281
B, Ravidb4a9322012-08-31 11:09:51 +0000282 if (time_after(glue->last_timer[pdev->id], timeout) &&
283 timer_pending(&glue->timer[pdev->id])) {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530284 dev_dbg(musb->controller,
285 "Longer idle timer already pending, ignoring...\n");
286 return;
287 }
B, Ravidb4a9322012-08-31 11:09:51 +0000288 glue->last_timer[pdev->id] = timeout;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530289
290 dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
291 otg_state_string(musb->xceiv->state),
292 jiffies_to_msecs(timeout - jiffies));
B, Ravidb4a9322012-08-31 11:09:51 +0000293 mod_timer(&glue->timer[pdev->id], timeout);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530294}
295
296static irqreturn_t dsps_interrupt(int irq, void *hci)
297{
298 struct musb *musb = hci;
299 void __iomem *reg_base = musb->ctrl_base;
300 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000301 struct platform_device *pdev = to_platform_device(dev);
302 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530303 const struct dsps_musb_wrapper *wrp = glue->wrp;
304 unsigned long flags;
305 irqreturn_t ret = IRQ_NONE;
306 u32 epintr, usbintr;
307
308 spin_lock_irqsave(&musb->lock, flags);
309
310 /* Get endpoint interrupts */
311 epintr = dsps_readl(reg_base, wrp->epintr_status);
312 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
313 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
314
315 if (epintr)
316 dsps_writel(reg_base, wrp->epintr_status, epintr);
317
318 /* Get usb core interrupts */
319 usbintr = dsps_readl(reg_base, wrp->coreintr_status);
320 if (!usbintr && !epintr)
321 goto eoi;
322
323 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
324 if (usbintr)
325 dsps_writel(reg_base, wrp->coreintr_status, usbintr);
326
327 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
328 usbintr, epintr);
329 /*
330 * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
331 * DSPS IP's missing ID change IRQ. We need an ID change IRQ to
332 * switch appropriately between halves of the OTG state machine.
333 * Managing DEVCTL.SESSION per Mentor docs requires that we know its
334 * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
335 * Also, DRVVBUS pulses for SRP (but not at 5V) ...
336 */
Felipe Balbi032ec492011-11-24 15:46:26 +0200337 if (usbintr & MUSB_INTR_BABBLE)
Masanari Iida984e8332012-11-01 00:03:51 +0900338 pr_info("CAUTION: musb: Babble Interrupt Occurred\n");
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530339
340 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
341 int drvvbus = dsps_readl(reg_base, wrp->status);
342 void __iomem *mregs = musb->mregs;
343 u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
344 int err;
345
Felipe Balbi032ec492011-11-24 15:46:26 +0200346 err = musb->int_usb & MUSB_INTR_VBUSERROR;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530347 if (err) {
348 /*
349 * The Mentor core doesn't debounce VBUS as needed
350 * to cope with device connect current spikes. This
351 * means it's not uncommon for bus-powered devices
352 * to get VBUS errors during enumeration.
353 *
354 * This is a workaround, but newer RTL from Mentor
355 * seems to allow a better one: "re"-starting sessions
356 * without waiting for VBUS to stop registering in
357 * devctl.
358 */
359 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
360 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
B, Ravidb4a9322012-08-31 11:09:51 +0000361 mod_timer(&glue->timer[pdev->id],
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530362 jiffies + wrp->poll_seconds * HZ);
363 WARNING("VBUS error workaround (delay coming)\n");
Felipe Balbi032ec492011-11-24 15:46:26 +0200364 } else if (drvvbus) {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530365 musb->is_active = 1;
366 MUSB_HST_MODE(musb);
367 musb->xceiv->otg->default_a = 1;
368 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
B, Ravidb4a9322012-08-31 11:09:51 +0000369 del_timer(&glue->timer[pdev->id]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530370 } else {
371 musb->is_active = 0;
372 MUSB_DEV_MODE(musb);
373 musb->xceiv->otg->default_a = 0;
374 musb->xceiv->state = OTG_STATE_B_IDLE;
375 }
376
377 /* NOTE: this must complete power-on within 100 ms. */
378 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
379 drvvbus ? "on" : "off",
380 otg_state_string(musb->xceiv->state),
381 err ? " ERROR" : "",
382 devctl);
383 ret = IRQ_HANDLED;
384 }
385
386 if (musb->int_tx || musb->int_rx || musb->int_usb)
387 ret |= musb_interrupt(musb);
388
389 eoi:
390 /* EOI needs to be written for the IRQ to be re-asserted. */
391 if (ret == IRQ_HANDLED || epintr || usbintr)
392 dsps_writel(reg_base, wrp->eoi, 1);
393
394 /* Poll for ID change */
Felipe Balbi032ec492011-11-24 15:46:26 +0200395 if (musb->xceiv->state == OTG_STATE_B_IDLE)
B, Ravidb4a9322012-08-31 11:09:51 +0000396 mod_timer(&glue->timer[pdev->id],
397 jiffies + wrp->poll_seconds * HZ);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530398
399 spin_unlock_irqrestore(&musb->lock, flags);
400
401 return ret;
402}
403
404static int dsps_musb_init(struct musb *musb)
405{
406 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000407 struct platform_device *pdev = to_platform_device(dev);
408 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530409 const struct dsps_musb_wrapper *wrp = glue->wrp;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530410 void __iomem *reg_base = musb->ctrl_base;
411 u32 rev, val;
412 int status;
413
414 /* mentor core register starts at offset of 0x400 from musb base */
415 musb->mregs += wrp->musb_core_offset;
416
Afzal Mohammedd7554222012-11-06 20:47:24 +0530417 /* NOP driver needs change if supporting dual instance */
418 usb_nop_xceiv_register();
Kishon Vijay Abraham I662dca52012-06-22 17:02:46 +0530419 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
Kishon Vijay Abraham Ided017e2012-06-26 17:40:32 +0530420 if (IS_ERR_OR_NULL(musb->xceiv))
Ming Lei25736e02013-01-04 23:13:58 +0800421 return -EPROBE_DEFER;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530422
423 /* Returns zero if e.g. not clocked */
424 rev = dsps_readl(reg_base, wrp->revision);
425 if (!rev) {
426 status = -ENODEV;
427 goto err0;
428 }
429
B, Ravidb4a9322012-08-31 11:09:51 +0000430 setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530431
432 /* Reset the musb */
433 dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
434
435 /* Start the on-chip PHY and its PLL. */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530436 musb_dsps_phy_control(glue, pdev->id, 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530437
438 musb->isr = dsps_interrupt;
439
440 /* reset the otgdisable bit, needed for host mode to work */
441 val = dsps_readl(reg_base, wrp->phy_utmi);
442 val &= ~(1 << wrp->otg_disable);
443 dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
444
445 /* clear level interrupt */
446 dsps_writel(reg_base, wrp->eoi, 0);
447
448 return 0;
449err0:
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530450 usb_put_phy(musb->xceiv);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530451 usb_nop_xceiv_unregister();
452 return status;
453}
454
455static int dsps_musb_exit(struct musb *musb)
456{
457 struct device *dev = musb->controller;
B, Ravidb4a9322012-08-31 11:09:51 +0000458 struct platform_device *pdev = to_platform_device(dev);
459 struct dsps_glue *glue = dev_get_drvdata(dev->parent);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530460
B, Ravidb4a9322012-08-31 11:09:51 +0000461 del_timer_sync(&glue->timer[pdev->id]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530462
463 /* Shutdown the on-chip PHY and its PLL. */
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530464 musb_dsps_phy_control(glue, pdev->id, 0);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530465
466 /* NOP driver needs change if supporting dual instance */
Kishon Vijay Abraham I721002e2012-06-22 17:02:45 +0530467 usb_put_phy(musb->xceiv);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530468 usb_nop_xceiv_unregister();
469
470 return 0;
471}
472
473static struct musb_platform_ops dsps_ops = {
474 .init = dsps_musb_init,
475 .exit = dsps_musb_exit,
476
477 .enable = dsps_musb_enable,
478 .disable = dsps_musb_disable,
479
480 .try_idle = dsps_musb_try_idle,
481};
482
483static u64 musb_dmamask = DMA_BIT_MASK(32);
484
Bill Pemberton41ac7b32012-11-19 13:21:48 -0500485static int dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530486{
487 struct device *dev = glue->dev;
488 struct platform_device *pdev = to_platform_device(dev);
489 struct musb_hdrc_platform_data *pdata = dev->platform_data;
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000490 struct device_node *np = pdev->dev.of_node;
491 struct musb_hdrc_config *config;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530492 struct platform_device *musb;
493 struct resource *res;
494 struct resource resources[2];
Daniel Mackca749b22012-10-17 22:17:35 +0200495 char res_name[11];
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100496 int ret;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530497
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530498 resources[0].start = dsps_control_module_phys[id];
499 resources[0].end = resources[0].start + SZ_4 - 1;
500 resources[0].flags = IORESOURCE_MEM;
501
Thierry Reding148e1132013-01-21 11:09:22 +0100502 glue->usb_ctrl[id] = devm_ioremap_resource(&pdev->dev, resources);
503 if (IS_ERR(glue->usb_ctrl[id])) {
504 ret = PTR_ERR(glue->usb_ctrl[id]);
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530505 goto err0;
506 }
507
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530508 /* first resource is for usbss, so start index from 1 */
509 res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530510 if (!res) {
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530511 dev_err(dev, "failed to get memory for instance %d\n", id);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530512 ret = -ENODEV;
513 goto err0;
514 }
515 res->parent = NULL;
516 resources[0] = *res;
517
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530518 /* first resource is for usbss, so start index from 1 */
519 res = platform_get_resource(pdev, IORESOURCE_IRQ, id + 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530520 if (!res) {
Afzal Mohammed3e594b12012-11-02 22:02:41 +0530521 dev_err(dev, "failed to get irq for instance %d\n", id);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530522 ret = -ENODEV;
523 goto err0;
524 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530525 res->parent = NULL;
526 resources[1] = *res;
Ajay Kumar Gupta3bb55342012-07-03 17:37:10 +0530527 resources[1].name = "mc";
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530528
B, Ravi65b3d522012-08-31 11:09:49 +0000529 /* allocate the child platform device */
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100530 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
B, Ravi65b3d522012-08-31 11:09:49 +0000531 if (!musb) {
532 dev_err(dev, "failed to allocate musb device\n");
533 ret = -ENOMEM;
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100534 goto err0;
B, Ravi65b3d522012-08-31 11:09:49 +0000535 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530536
537 musb->dev.parent = dev;
538 musb->dev.dma_mask = &musb_dmamask;
539 musb->dev.coherent_dma_mask = musb_dmamask;
540
B, Ravidb4a9322012-08-31 11:09:51 +0000541 glue->musb[id] = musb;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530542
543 ret = platform_device_add_resources(musb, resources, 2);
544 if (ret) {
545 dev_err(dev, "failed to add resources\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000546 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530547 }
548
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000549 if (np) {
550 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
551 if (!pdata) {
552 dev_err(&pdev->dev,
553 "failed to allocate musb platfrom data\n");
554 ret = -ENOMEM;
555 goto err2;
556 }
557
558 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
559 if (!config) {
560 dev_err(&pdev->dev,
561 "failed to allocate musb hdrc config\n");
562 goto err2;
563 }
564
565 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
566 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
Daniel Mackca749b22012-10-17 22:17:35 +0200567 snprintf(res_name, sizeof(res_name), "port%d-mode", id);
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000568 of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
569 of_property_read_u32(np, "power", (u32 *)&pdata->power);
570 config->multipoint = of_property_read_bool(np, "multipoint");
571
572 pdata->config = config;
573 }
574
575 pdata->platform_ops = &dsps_ops;
576
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530577 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
578 if (ret) {
579 dev_err(dev, "failed to add platform_data\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000580 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530581 }
582
583 ret = platform_device_add(musb);
584 if (ret) {
585 dev_err(dev, "failed to register musb device\n");
B, Ravi65b3d522012-08-31 11:09:49 +0000586 goto err2;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530587 }
588
589 return 0;
590
B, Ravi65b3d522012-08-31 11:09:49 +0000591err2:
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530592 platform_device_put(musb);
593err0:
594 return ret;
595}
596
Bill Pemberton41ac7b32012-11-19 13:21:48 -0500597static int dsps_probe(struct platform_device *pdev)
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530598{
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000599 struct device_node *np = pdev->dev.of_node;
600 const struct of_device_id *match;
601 const struct dsps_musb_wrapper *wrp;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530602 struct dsps_glue *glue;
603 struct resource *iomem;
B, Ravidb4a9322012-08-31 11:09:51 +0000604 int ret, i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530605
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000606 match = of_match_node(musb_dsps_of_match, np);
607 if (!match) {
608 dev_err(&pdev->dev, "fail to get matching of_match struct\n");
609 ret = -EINVAL;
610 goto err0;
611 }
612 wrp = match->data;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530613
614 /* allocate glue */
615 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
616 if (!glue) {
617 dev_err(&pdev->dev, "unable to allocate glue memory\n");
618 ret = -ENOMEM;
619 goto err0;
620 }
621
622 /* get memory resource */
623 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
624 if (!iomem) {
625 dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
626 ret = -ENODEV;
627 goto err1;
628 }
629
630 glue->dev = &pdev->dev;
631
632 glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
633 if (!glue->wrp) {
634 dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
635 ret = -ENOMEM;
636 goto err1;
637 }
638 platform_set_drvdata(pdev, glue);
639
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530640 /* enable the usbss clocks */
641 pm_runtime_enable(&pdev->dev);
642
643 ret = pm_runtime_get_sync(&pdev->dev);
644 if (ret < 0) {
645 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530646 goto err2;
647 }
648
B, Ravidb4a9322012-08-31 11:09:51 +0000649 /* create the child platform device for all instances of musb */
650 for (i = 0; i < wrp->instances ; i++) {
651 ret = dsps_create_musb_pdev(glue, i);
652 if (ret != 0) {
653 dev_err(&pdev->dev, "failed to create child pdev\n");
654 /* release resources of previously created instances */
655 for (i--; i >= 0 ; i--)
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100656 platform_device_unregister(glue->musb[i]);
B, Ravidb4a9322012-08-31 11:09:51 +0000657 goto err3;
658 }
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530659 }
660
661 return 0;
662
663err3:
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530664 pm_runtime_put(&pdev->dev);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530665err2:
Ajay Kumar Gupta0e38c4e2012-07-03 17:37:11 +0530666 pm_runtime_disable(&pdev->dev);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530667 kfree(glue->wrp);
668err1:
669 kfree(glue);
670err0:
671 return ret;
672}
Bill Pembertonfb4e98a2012-11-19 13:26:20 -0500673static int dsps_remove(struct platform_device *pdev)
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530674{
675 struct dsps_glue *glue = platform_get_drvdata(pdev);
B, Ravidb4a9322012-08-31 11:09:51 +0000676 const struct dsps_musb_wrapper *wrp = glue->wrp;
677 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530678
679 /* delete the child platform device */
B, Ravidb4a9322012-08-31 11:09:51 +0000680 for (i = 0; i < wrp->instances ; i++)
Sebastian Andrzej Siewior2f771162012-10-31 16:12:43 +0100681 platform_device_unregister(glue->musb[i]);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530682
683 /* disable usbss clocks */
684 pm_runtime_put(&pdev->dev);
685 pm_runtime_disable(&pdev->dev);
686 kfree(glue->wrp);
687 kfree(glue);
688 return 0;
689}
690
691#ifdef CONFIG_PM_SLEEP
692static int dsps_suspend(struct device *dev)
693{
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530694 struct platform_device *pdev = to_platform_device(dev->parent);
695 struct dsps_glue *glue = platform_get_drvdata(pdev);
696 const struct dsps_musb_wrapper *wrp = glue->wrp;
697 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530698
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530699 for (i = 0; i < wrp->instances; i++)
700 musb_dsps_phy_control(glue, i, 0);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530701
702 return 0;
703}
704
705static int dsps_resume(struct device *dev)
706{
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530707 struct platform_device *pdev = to_platform_device(dev->parent);
708 struct dsps_glue *glue = platform_get_drvdata(pdev);
709 const struct dsps_musb_wrapper *wrp = glue->wrp;
710 int i;
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530711
Santhapuri, Damodarc68bb4c2012-11-02 22:02:53 +0530712 for (i = 0; i < wrp->instances; i++)
713 musb_dsps_phy_control(glue, i, 1);
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530714
715 return 0;
716}
717#endif
718
719static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
720
Bill Pemberton2f826862012-11-19 13:25:20 -0500721static const struct dsps_musb_wrapper ti81xx_driver_data = {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530722 .revision = 0x00,
723 .control = 0x14,
724 .status = 0x18,
725 .eoi = 0x24,
726 .epintr_set = 0x38,
727 .epintr_clear = 0x40,
728 .epintr_status = 0x30,
729 .coreintr_set = 0x3c,
730 .coreintr_clear = 0x44,
731 .coreintr_status = 0x34,
732 .phy_utmi = 0xe0,
733 .mode = 0xe8,
734 .reset = 0,
735 .otg_disable = 21,
736 .iddig = 8,
737 .usb_shift = 0,
738 .usb_mask = 0x1ff,
739 .usb_bitmap = (0x1ff << 0),
740 .drvvbus = 8,
741 .txep_shift = 0,
742 .txep_mask = 0xffff,
743 .txep_bitmap = (0xffff << 0),
744 .rxep_shift = 16,
745 .rxep_mask = 0xfffe,
746 .rxep_bitmap = (0xfffe << 16),
747 .musb_core_offset = 0x400,
748 .poll_seconds = 2,
Afzal Mohammed3b46dd72012-11-02 22:02:35 +0530749 .instances = 1,
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530750};
751
Bill Pemberton2f826862012-11-19 13:25:20 -0500752static const struct platform_device_id musb_dsps_id_table[] = {
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530753 {
754 .name = "musb-ti81xx",
755 .driver_data = (kernel_ulong_t) &ti81xx_driver_data,
756 },
757 { }, /* Terminating Entry */
758};
759MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
760
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000761#ifdef CONFIG_OF
Bill Pemberton2f826862012-11-19 13:25:20 -0500762static const struct of_device_id musb_dsps_of_match[] = {
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000763 { .compatible = "ti,musb-am33xx",
764 .data = (void *) &ti81xx_driver_data, },
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530765 { },
766};
767MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000768#endif
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530769
770static struct platform_driver dsps_usbss_driver = {
771 .probe = dsps_probe,
Bill Pemberton76904172012-11-19 13:21:08 -0500772 .remove = dsps_remove,
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530773 .driver = {
774 .name = "musb-dsps",
775 .pm = &dsps_pm_ops,
Ajay Kumar Gupta65145672012-08-31 11:09:53 +0000776 .of_match_table = of_match_ptr(musb_dsps_of_match),
Ajay Kumar Gupta9ecb8872012-03-12 19:30:22 +0530777 },
778 .id_table = musb_dsps_id_table,
779};
780
781MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
782MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
783MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
784MODULE_LICENSE("GPL v2");
785
786static int __init dsps_init(void)
787{
788 return platform_driver_register(&dsps_usbss_driver);
789}
790subsys_initcall(dsps_init);
791
792static void __exit dsps_exit(void)
793{
794 platform_driver_unregister(&dsps_usbss_driver);
795}
796module_exit(dsps_exit);