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3ee076de SS |
1 | /* |
2 | * Texas Instruments DA8xx/OMAP-L1x "glue layer" | |
3 | * | |
4 | * Copyright (c) 2008-2009 MontaVista Software, Inc. <source@mvista.com> | |
5 | * | |
6 | * Based on the DaVinci "glue layer" code. | |
7 | * Copyright (C) 2005-2006 by Texas Instruments | |
8 | * | |
9 | * This file is part of the Inventra Controller Driver for Linux. | |
10 | * | |
11 | * The Inventra Controller Driver for Linux is free software; you | |
12 | * can redistribute it and/or modify it under the terms of the GNU | |
13 | * General Public License version 2 as published by the Free Software | |
14 | * Foundation. | |
15 | * | |
16 | * The Inventra Controller Driver for Linux is distributed in | |
17 | * the hope that it will be useful, but WITHOUT ANY WARRANTY; | |
18 | * without even the implied warranty of MERCHANTABILITY or | |
19 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
20 | * License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with The Inventra Controller Driver for Linux ; if not, | |
24 | * write to the Free Software Foundation, Inc., 59 Temple Place, | |
25 | * Suite 330, Boston, MA 02111-1307 USA | |
26 | * | |
27 | */ | |
28 | ||
29 | #include <linux/init.h> | |
ab570da2 | 30 | #include <linux/module.h> |
3ee076de SS |
31 | #include <linux/clk.h> |
32 | #include <linux/io.h> | |
8ceae51e FB |
33 | #include <linux/platform_device.h> |
34 | #include <linux/dma-mapping.h> | |
3ee076de SS |
35 | |
36 | #include <mach/da8xx.h> | |
37 | #include <mach/usb.h> | |
38 | ||
39 | #include "musb_core.h" | |
40 | ||
41 | /* | |
42 | * DA8XX specific definitions | |
43 | */ | |
44 | ||
45 | /* USB 2.0 OTG module registers */ | |
46 | #define DA8XX_USB_REVISION_REG 0x00 | |
47 | #define DA8XX_USB_CTRL_REG 0x04 | |
48 | #define DA8XX_USB_STAT_REG 0x08 | |
49 | #define DA8XX_USB_EMULATION_REG 0x0c | |
50 | #define DA8XX_USB_MODE_REG 0x10 /* Transparent, CDC, [Generic] RNDIS */ | |
51 | #define DA8XX_USB_AUTOREQ_REG 0x14 | |
52 | #define DA8XX_USB_SRP_FIX_TIME_REG 0x18 | |
53 | #define DA8XX_USB_TEARDOWN_REG 0x1c | |
54 | #define DA8XX_USB_INTR_SRC_REG 0x20 | |
55 | #define DA8XX_USB_INTR_SRC_SET_REG 0x24 | |
56 | #define DA8XX_USB_INTR_SRC_CLEAR_REG 0x28 | |
57 | #define DA8XX_USB_INTR_MASK_REG 0x2c | |
58 | #define DA8XX_USB_INTR_MASK_SET_REG 0x30 | |
59 | #define DA8XX_USB_INTR_MASK_CLEAR_REG 0x34 | |
60 | #define DA8XX_USB_INTR_SRC_MASKED_REG 0x38 | |
61 | #define DA8XX_USB_END_OF_INTR_REG 0x3c | |
62 | #define DA8XX_USB_GENERIC_RNDIS_EP_SIZE_REG(n) (0x50 + (((n) - 1) << 2)) | |
63 | ||
64 | /* Control register bits */ | |
65 | #define DA8XX_SOFT_RESET_MASK 1 | |
66 | ||
67 | #define DA8XX_USB_TX_EP_MASK 0x1f /* EP0 + 4 Tx EPs */ | |
68 | #define DA8XX_USB_RX_EP_MASK 0x1e /* 4 Rx EPs */ | |
69 | ||
70 | /* USB interrupt register bits */ | |
71 | #define DA8XX_INTR_USB_SHIFT 16 | |
72 | #define DA8XX_INTR_USB_MASK (0x1ff << DA8XX_INTR_USB_SHIFT) /* 8 Mentor */ | |
73 | /* interrupts and DRVVBUS interrupt */ | |
74 | #define DA8XX_INTR_DRVVBUS 0x100 | |
75 | #define DA8XX_INTR_RX_SHIFT 8 | |
76 | #define DA8XX_INTR_RX_MASK (DA8XX_USB_RX_EP_MASK << DA8XX_INTR_RX_SHIFT) | |
77 | #define DA8XX_INTR_TX_SHIFT 0 | |
78 | #define DA8XX_INTR_TX_MASK (DA8XX_USB_TX_EP_MASK << DA8XX_INTR_TX_SHIFT) | |
79 | ||
80 | #define DA8XX_MENTOR_CORE_OFFSET 0x400 | |
81 | ||
82 | #define CFGCHIP2 IO_ADDRESS(DA8XX_SYSCFG0_BASE + DA8XX_CFGCHIP2_REG) | |
83 | ||
e6480faa FB |
84 | struct da8xx_glue { |
85 | struct device *dev; | |
86 | struct platform_device *musb; | |
03491761 | 87 | struct clk *clk; |
e6480faa FB |
88 | }; |
89 | ||
3ee076de SS |
90 | /* |
91 | * REVISIT (PM): we should be able to keep the PHY in low power mode most | |
92 | * of the time (24 MHz oscillator and PLL off, etc.) by setting POWER.D0 | |
93 | * and, when in host mode, autosuspending idle root ports... PHY_PLLON | |
94 | * (overriding SUSPENDM?) then likely needs to stay off. | |
95 | */ | |
96 | ||
97 | static inline void phy_on(void) | |
98 | { | |
99 | u32 cfgchip2 = __raw_readl(CFGCHIP2); | |
100 | ||
101 | /* | |
102 | * Start the on-chip PHY and its PLL. | |
103 | */ | |
104 | cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN); | |
105 | cfgchip2 |= CFGCHIP2_PHY_PLLON; | |
106 | __raw_writel(cfgchip2, CFGCHIP2); | |
107 | ||
108 | pr_info("Waiting for USB PHY clock good...\n"); | |
109 | while (!(__raw_readl(CFGCHIP2) & CFGCHIP2_PHYCLKGD)) | |
110 | cpu_relax(); | |
111 | } | |
112 | ||
113 | static inline void phy_off(void) | |
114 | { | |
115 | u32 cfgchip2 = __raw_readl(CFGCHIP2); | |
116 | ||
117 | /* | |
118 | * Ensure that USB 1.1 reference clock is not being sourced from | |
119 | * USB 2.0 PHY. Otherwise do not power down the PHY. | |
120 | */ | |
121 | if (!(cfgchip2 & CFGCHIP2_USB1PHYCLKMUX) && | |
122 | (cfgchip2 & CFGCHIP2_USB1SUSPENDM)) { | |
123 | pr_warning("USB 1.1 clocked from USB 2.0 PHY -- " | |
124 | "can't power it down\n"); | |
125 | return; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Power down the on-chip PHY. | |
130 | */ | |
131 | cfgchip2 |= CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN; | |
132 | __raw_writel(cfgchip2, CFGCHIP2); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Because we don't set CTRL.UINT, it's "important" to: | |
137 | * - not read/write INTRUSB/INTRUSBE (except during | |
138 | * initial setup, as a workaround); | |
139 | * - use INTSET/INTCLR instead. | |
140 | */ | |
141 | ||
142 | /** | |
743411b3 | 143 | * da8xx_musb_enable - enable interrupts |
3ee076de | 144 | */ |
743411b3 | 145 | static void da8xx_musb_enable(struct musb *musb) |
3ee076de SS |
146 | { |
147 | void __iomem *reg_base = musb->ctrl_base; | |
148 | u32 mask; | |
149 | ||
150 | /* Workaround: setup IRQs through both register sets. */ | |
151 | mask = ((musb->epmask & DA8XX_USB_TX_EP_MASK) << DA8XX_INTR_TX_SHIFT) | | |
152 | ((musb->epmask & DA8XX_USB_RX_EP_MASK) << DA8XX_INTR_RX_SHIFT) | | |
153 | DA8XX_INTR_USB_MASK; | |
154 | musb_writel(reg_base, DA8XX_USB_INTR_MASK_SET_REG, mask); | |
155 | ||
156 | /* Force the DRVVBUS IRQ so we can start polling for ID change. */ | |
157 | if (is_otg_enabled(musb)) | |
158 | musb_writel(reg_base, DA8XX_USB_INTR_SRC_SET_REG, | |
159 | DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT); | |
160 | } | |
161 | ||
162 | /** | |
743411b3 | 163 | * da8xx_musb_disable - disable HDRC and flush interrupts |
3ee076de | 164 | */ |
743411b3 | 165 | static void da8xx_musb_disable(struct musb *musb) |
3ee076de SS |
166 | { |
167 | void __iomem *reg_base = musb->ctrl_base; | |
168 | ||
169 | musb_writel(reg_base, DA8XX_USB_INTR_MASK_CLEAR_REG, | |
170 | DA8XX_INTR_USB_MASK | | |
171 | DA8XX_INTR_TX_MASK | DA8XX_INTR_RX_MASK); | |
172 | musb_writeb(musb->mregs, MUSB_DEVCTL, 0); | |
173 | musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0); | |
174 | } | |
175 | ||
62285963 | 176 | #define portstate(stmt) stmt |
3ee076de | 177 | |
743411b3 | 178 | static void da8xx_musb_set_vbus(struct musb *musb, int is_on) |
3ee076de SS |
179 | { |
180 | WARN_ON(is_on && is_peripheral_active(musb)); | |
181 | } | |
182 | ||
183 | #define POLL_SECONDS 2 | |
184 | ||
185 | static struct timer_list otg_workaround; | |
186 | ||
187 | static void otg_timer(unsigned long _musb) | |
188 | { | |
189 | struct musb *musb = (void *)_musb; | |
190 | void __iomem *mregs = musb->mregs; | |
191 | u8 devctl; | |
192 | unsigned long flags; | |
193 | ||
194 | /* | |
195 | * We poll because DaVinci's won't expose several OTG-critical | |
196 | * status change events (from the transceiver) otherwise. | |
197 | */ | |
198 | devctl = musb_readb(mregs, MUSB_DEVCTL); | |
5c8a86e1 | 199 | dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, |
3df00453 | 200 | otg_state_string(musb->xceiv->state)); |
3ee076de SS |
201 | |
202 | spin_lock_irqsave(&musb->lock, flags); | |
203 | switch (musb->xceiv->state) { | |
204 | case OTG_STATE_A_WAIT_BCON: | |
205 | devctl &= ~MUSB_DEVCTL_SESSION; | |
206 | musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); | |
207 | ||
208 | devctl = musb_readb(musb->mregs, MUSB_DEVCTL); | |
209 | if (devctl & MUSB_DEVCTL_BDEVICE) { | |
210 | musb->xceiv->state = OTG_STATE_B_IDLE; | |
211 | MUSB_DEV_MODE(musb); | |
212 | } else { | |
213 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
214 | MUSB_HST_MODE(musb); | |
215 | } | |
216 | break; | |
217 | case OTG_STATE_A_WAIT_VFALL: | |
218 | /* | |
219 | * Wait till VBUS falls below SessionEnd (~0.2 V); the 1.3 | |
220 | * RTL seems to mis-handle session "start" otherwise (or in | |
221 | * our case "recover"), in routine "VBUS was valid by the time | |
222 | * VBUSERR got reported during enumeration" cases. | |
223 | */ | |
224 | if (devctl & MUSB_DEVCTL_VBUS) { | |
225 | mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ); | |
226 | break; | |
227 | } | |
228 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; | |
229 | musb_writel(musb->ctrl_base, DA8XX_USB_INTR_SRC_SET_REG, | |
230 | MUSB_INTR_VBUSERROR << DA8XX_INTR_USB_SHIFT); | |
231 | break; | |
232 | case OTG_STATE_B_IDLE: | |
233 | if (!is_peripheral_enabled(musb)) | |
234 | break; | |
235 | ||
236 | /* | |
237 | * There's no ID-changed IRQ, so we have no good way to tell | |
238 | * when to switch to the A-Default state machine (by setting | |
239 | * the DEVCTL.Session bit). | |
240 | * | |
241 | * Workaround: whenever we're in B_IDLE, try setting the | |
242 | * session flag every few seconds. If it works, ID was | |
243 | * grounded and we're now in the A-Default state machine. | |
244 | * | |
245 | * NOTE: setting the session flag is _supposed_ to trigger | |
246 | * SRP but clearly it doesn't. | |
247 | */ | |
248 | musb_writeb(mregs, MUSB_DEVCTL, devctl | MUSB_DEVCTL_SESSION); | |
249 | devctl = musb_readb(mregs, MUSB_DEVCTL); | |
250 | if (devctl & MUSB_DEVCTL_BDEVICE) | |
251 | mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ); | |
252 | else | |
253 | musb->xceiv->state = OTG_STATE_A_IDLE; | |
254 | break; | |
255 | default: | |
256 | break; | |
257 | } | |
258 | spin_unlock_irqrestore(&musb->lock, flags); | |
259 | } | |
260 | ||
743411b3 | 261 | static void da8xx_musb_try_idle(struct musb *musb, unsigned long timeout) |
3ee076de SS |
262 | { |
263 | static unsigned long last_timer; | |
264 | ||
265 | if (!is_otg_enabled(musb)) | |
266 | return; | |
267 | ||
268 | if (timeout == 0) | |
269 | timeout = jiffies + msecs_to_jiffies(3); | |
270 | ||
271 | /* Never idle if active, or when VBUS timeout is not set as host */ | |
272 | if (musb->is_active || (musb->a_wait_bcon == 0 && | |
273 | musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { | |
5c8a86e1 | 274 | dev_dbg(musb->controller, "%s active, deleting timer\n", |
3df00453 | 275 | otg_state_string(musb->xceiv->state)); |
3ee076de SS |
276 | del_timer(&otg_workaround); |
277 | last_timer = jiffies; | |
278 | return; | |
279 | } | |
280 | ||
281 | if (time_after(last_timer, timeout) && timer_pending(&otg_workaround)) { | |
5c8a86e1 | 282 | dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n"); |
3ee076de SS |
283 | return; |
284 | } | |
285 | last_timer = timeout; | |
286 | ||
5c8a86e1 | 287 | dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", |
3df00453 AG |
288 | otg_state_string(musb->xceiv->state), |
289 | jiffies_to_msecs(timeout - jiffies)); | |
3ee076de SS |
290 | mod_timer(&otg_workaround, timeout); |
291 | } | |
292 | ||
743411b3 | 293 | static irqreturn_t da8xx_musb_interrupt(int irq, void *hci) |
3ee076de SS |
294 | { |
295 | struct musb *musb = hci; | |
296 | void __iomem *reg_base = musb->ctrl_base; | |
d445b6da | 297 | struct usb_otg *otg = musb->xceiv->otg; |
3ee076de SS |
298 | unsigned long flags; |
299 | irqreturn_t ret = IRQ_NONE; | |
300 | u32 status; | |
301 | ||
302 | spin_lock_irqsave(&musb->lock, flags); | |
303 | ||
304 | /* | |
305 | * NOTE: DA8XX shadows the Mentor IRQs. Don't manage them through | |
306 | * the Mentor registers (except for setup), use the TI ones and EOI. | |
307 | */ | |
308 | ||
309 | /* Acknowledge and handle non-CPPI interrupts */ | |
310 | status = musb_readl(reg_base, DA8XX_USB_INTR_SRC_MASKED_REG); | |
311 | if (!status) | |
312 | goto eoi; | |
313 | ||
314 | musb_writel(reg_base, DA8XX_USB_INTR_SRC_CLEAR_REG, status); | |
5c8a86e1 | 315 | dev_dbg(musb->controller, "USB IRQ %08x\n", status); |
3ee076de SS |
316 | |
317 | musb->int_rx = (status & DA8XX_INTR_RX_MASK) >> DA8XX_INTR_RX_SHIFT; | |
318 | musb->int_tx = (status & DA8XX_INTR_TX_MASK) >> DA8XX_INTR_TX_SHIFT; | |
319 | musb->int_usb = (status & DA8XX_INTR_USB_MASK) >> DA8XX_INTR_USB_SHIFT; | |
320 | ||
321 | /* | |
322 | * DRVVBUS IRQs are the only proxy we have (a very poor one!) for | |
323 | * DA8xx's missing ID change IRQ. We need an ID change IRQ to | |
324 | * switch appropriately between halves of the OTG state machine. | |
325 | * Managing DEVCTL.Session per Mentor docs requires that we know its | |
326 | * value but DEVCTL.BDevice is invalid without DEVCTL.Session set. | |
327 | * Also, DRVVBUS pulses for SRP (but not at 5 V)... | |
328 | */ | |
329 | if (status & (DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT)) { | |
330 | int drvvbus = musb_readl(reg_base, DA8XX_USB_STAT_REG); | |
331 | void __iomem *mregs = musb->mregs; | |
332 | u8 devctl = musb_readb(mregs, MUSB_DEVCTL); | |
333 | int err; | |
334 | ||
335 | err = is_host_enabled(musb) && (musb->int_usb & | |
336 | MUSB_INTR_VBUSERROR); | |
337 | if (err) { | |
338 | /* | |
339 | * The Mentor core doesn't debounce VBUS as needed | |
340 | * to cope with device connect current spikes. This | |
341 | * means it's not uncommon for bus-powered devices | |
342 | * to get VBUS errors during enumeration. | |
343 | * | |
344 | * This is a workaround, but newer RTL from Mentor | |
345 | * seems to allow a better one: "re"-starting sessions | |
346 | * without waiting for VBUS to stop registering in | |
347 | * devctl. | |
348 | */ | |
349 | musb->int_usb &= ~MUSB_INTR_VBUSERROR; | |
350 | musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; | |
351 | mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ); | |
352 | WARNING("VBUS error workaround (delay coming)\n"); | |
353 | } else if (is_host_enabled(musb) && drvvbus) { | |
354 | MUSB_HST_MODE(musb); | |
d445b6da | 355 | otg->default_a = 1; |
3ee076de SS |
356 | musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; |
357 | portstate(musb->port1_status |= USB_PORT_STAT_POWER); | |
358 | del_timer(&otg_workaround); | |
359 | } else { | |
360 | musb->is_active = 0; | |
361 | MUSB_DEV_MODE(musb); | |
d445b6da | 362 | otg->default_a = 0; |
3ee076de SS |
363 | musb->xceiv->state = OTG_STATE_B_IDLE; |
364 | portstate(musb->port1_status &= ~USB_PORT_STAT_POWER); | |
365 | } | |
366 | ||
5c8a86e1 | 367 | dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", |
3ee076de | 368 | drvvbus ? "on" : "off", |
3df00453 | 369 | otg_state_string(musb->xceiv->state), |
3ee076de SS |
370 | err ? " ERROR" : "", |
371 | devctl); | |
372 | ret = IRQ_HANDLED; | |
373 | } | |
374 | ||
375 | if (musb->int_tx || musb->int_rx || musb->int_usb) | |
376 | ret |= musb_interrupt(musb); | |
377 | ||
378 | eoi: | |
379 | /* EOI needs to be written for the IRQ to be re-asserted. */ | |
380 | if (ret == IRQ_HANDLED || status) | |
381 | musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0); | |
382 | ||
383 | /* Poll for ID change */ | |
384 | if (is_otg_enabled(musb) && musb->xceiv->state == OTG_STATE_B_IDLE) | |
385 | mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ); | |
386 | ||
387 | spin_unlock_irqrestore(&musb->lock, flags); | |
388 | ||
389 | return ret; | |
390 | } | |
391 | ||
743411b3 | 392 | static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode) |
3ee076de SS |
393 | { |
394 | u32 cfgchip2 = __raw_readl(CFGCHIP2); | |
395 | ||
396 | cfgchip2 &= ~CFGCHIP2_OTGMODE; | |
397 | switch (musb_mode) { | |
3ee076de SS |
398 | case MUSB_HOST: /* Force VBUS valid, ID = 0 */ |
399 | cfgchip2 |= CFGCHIP2_FORCE_HOST; | |
400 | break; | |
3ee076de SS |
401 | case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ |
402 | cfgchip2 |= CFGCHIP2_FORCE_DEVICE; | |
403 | break; | |
3ee076de SS |
404 | case MUSB_OTG: /* Don't override the VBUS/ID comparators */ |
405 | cfgchip2 |= CFGCHIP2_NO_OVERRIDE; | |
406 | break; | |
3ee076de | 407 | default: |
5c8a86e1 | 408 | dev_dbg(musb->controller, "Trying to set unsupported mode %u\n", musb_mode); |
3ee076de SS |
409 | } |
410 | ||
411 | __raw_writel(cfgchip2, CFGCHIP2); | |
412 | return 0; | |
413 | } | |
414 | ||
743411b3 | 415 | static int da8xx_musb_init(struct musb *musb) |
3ee076de SS |
416 | { |
417 | void __iomem *reg_base = musb->ctrl_base; | |
418 | u32 rev; | |
419 | ||
420 | musb->mregs += DA8XX_MENTOR_CORE_OFFSET; | |
421 | ||
3ee076de SS |
422 | /* Returns zero if e.g. not clocked */ |
423 | rev = musb_readl(reg_base, DA8XX_USB_REVISION_REG); | |
424 | if (!rev) | |
425 | goto fail; | |
426 | ||
427 | usb_nop_xceiv_register(); | |
662dca54 | 428 | musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2); |
3ee076de SS |
429 | if (!musb->xceiv) |
430 | goto fail; | |
431 | ||
432 | if (is_host_enabled(musb)) | |
433 | setup_timer(&otg_workaround, otg_timer, (unsigned long)musb); | |
434 | ||
3ee076de SS |
435 | /* Reset the controller */ |
436 | musb_writel(reg_base, DA8XX_USB_CTRL_REG, DA8XX_SOFT_RESET_MASK); | |
437 | ||
438 | /* Start the on-chip PHY and its PLL. */ | |
439 | phy_on(); | |
440 | ||
441 | msleep(5); | |
442 | ||
443 | /* NOTE: IRQs are in mixed mode, not bypass to pure MUSB */ | |
444 | pr_debug("DA8xx OTG revision %08x, PHY %03x, control %02x\n", | |
445 | rev, __raw_readl(CFGCHIP2), | |
446 | musb_readb(reg_base, DA8XX_USB_CTRL_REG)); | |
447 | ||
743411b3 | 448 | musb->isr = da8xx_musb_interrupt; |
3ee076de SS |
449 | return 0; |
450 | fail: | |
3ee076de SS |
451 | return -ENODEV; |
452 | } | |
453 | ||
743411b3 | 454 | static int da8xx_musb_exit(struct musb *musb) |
3ee076de SS |
455 | { |
456 | if (is_host_enabled(musb)) | |
457 | del_timer_sync(&otg_workaround); | |
458 | ||
459 | phy_off(); | |
460 | ||
721002ec | 461 | usb_put_phy(musb->xceiv); |
3ee076de SS |
462 | usb_nop_xceiv_unregister(); |
463 | ||
3ee076de SS |
464 | return 0; |
465 | } | |
743411b3 | 466 | |
f7ec9437 | 467 | static const struct musb_platform_ops da8xx_ops = { |
743411b3 FB |
468 | .init = da8xx_musb_init, |
469 | .exit = da8xx_musb_exit, | |
470 | ||
471 | .enable = da8xx_musb_enable, | |
472 | .disable = da8xx_musb_disable, | |
473 | ||
474 | .set_mode = da8xx_musb_set_mode, | |
475 | .try_idle = da8xx_musb_try_idle, | |
476 | ||
477 | .set_vbus = da8xx_musb_set_vbus, | |
478 | }; | |
8ceae51e FB |
479 | |
480 | static u64 da8xx_dmamask = DMA_BIT_MASK(32); | |
481 | ||
e9e8c85e | 482 | static int __devinit da8xx_probe(struct platform_device *pdev) |
8ceae51e FB |
483 | { |
484 | struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data; | |
485 | struct platform_device *musb; | |
e6480faa | 486 | struct da8xx_glue *glue; |
8ceae51e | 487 | |
03491761 FB |
488 | struct clk *clk; |
489 | ||
8ceae51e FB |
490 | int ret = -ENOMEM; |
491 | ||
e6480faa FB |
492 | glue = kzalloc(sizeof(*glue), GFP_KERNEL); |
493 | if (!glue) { | |
494 | dev_err(&pdev->dev, "failed to allocate glue context\n"); | |
495 | goto err0; | |
496 | } | |
497 | ||
8ceae51e FB |
498 | musb = platform_device_alloc("musb-hdrc", -1); |
499 | if (!musb) { | |
500 | dev_err(&pdev->dev, "failed to allocate musb device\n"); | |
e6480faa | 501 | goto err1; |
8ceae51e FB |
502 | } |
503 | ||
03491761 FB |
504 | clk = clk_get(&pdev->dev, "usb20"); |
505 | if (IS_ERR(clk)) { | |
506 | dev_err(&pdev->dev, "failed to get clock\n"); | |
507 | ret = PTR_ERR(clk); | |
508 | goto err2; | |
509 | } | |
510 | ||
511 | ret = clk_enable(clk); | |
512 | if (ret) { | |
513 | dev_err(&pdev->dev, "failed to enable clock\n"); | |
514 | goto err3; | |
515 | } | |
516 | ||
8ceae51e FB |
517 | musb->dev.parent = &pdev->dev; |
518 | musb->dev.dma_mask = &da8xx_dmamask; | |
519 | musb->dev.coherent_dma_mask = da8xx_dmamask; | |
520 | ||
e6480faa FB |
521 | glue->dev = &pdev->dev; |
522 | glue->musb = musb; | |
03491761 | 523 | glue->clk = clk; |
e6480faa | 524 | |
f7ec9437 FB |
525 | pdata->platform_ops = &da8xx_ops; |
526 | ||
e6480faa | 527 | platform_set_drvdata(pdev, glue); |
8ceae51e FB |
528 | |
529 | ret = platform_device_add_resources(musb, pdev->resource, | |
530 | pdev->num_resources); | |
531 | if (ret) { | |
532 | dev_err(&pdev->dev, "failed to add resources\n"); | |
03491761 | 533 | goto err4; |
8ceae51e FB |
534 | } |
535 | ||
536 | ret = platform_device_add_data(musb, pdata, sizeof(*pdata)); | |
537 | if (ret) { | |
538 | dev_err(&pdev->dev, "failed to add platform_data\n"); | |
03491761 | 539 | goto err4; |
8ceae51e FB |
540 | } |
541 | ||
542 | ret = platform_device_add(musb); | |
543 | if (ret) { | |
544 | dev_err(&pdev->dev, "failed to register musb device\n"); | |
03491761 | 545 | goto err4; |
8ceae51e FB |
546 | } |
547 | ||
548 | return 0; | |
549 | ||
03491761 FB |
550 | err4: |
551 | clk_disable(clk); | |
552 | ||
553 | err3: | |
554 | clk_put(clk); | |
555 | ||
e6480faa | 556 | err2: |
8ceae51e FB |
557 | platform_device_put(musb); |
558 | ||
e6480faa FB |
559 | err1: |
560 | kfree(glue); | |
561 | ||
8ceae51e FB |
562 | err0: |
563 | return ret; | |
564 | } | |
565 | ||
e9e8c85e | 566 | static int __devexit da8xx_remove(struct platform_device *pdev) |
8ceae51e | 567 | { |
e6480faa | 568 | struct da8xx_glue *glue = platform_get_drvdata(pdev); |
8ceae51e | 569 | |
e6480faa FB |
570 | platform_device_del(glue->musb); |
571 | platform_device_put(glue->musb); | |
03491761 FB |
572 | clk_disable(glue->clk); |
573 | clk_put(glue->clk); | |
e6480faa | 574 | kfree(glue); |
8ceae51e FB |
575 | |
576 | return 0; | |
577 | } | |
578 | ||
579 | static struct platform_driver da8xx_driver = { | |
e9e8c85e FB |
580 | .probe = da8xx_probe, |
581 | .remove = __devexit_p(da8xx_remove), | |
8ceae51e FB |
582 | .driver = { |
583 | .name = "musb-da8xx", | |
584 | }, | |
585 | }; | |
586 | ||
587 | MODULE_DESCRIPTION("DA8xx/OMAP-L1x MUSB Glue Layer"); | |
588 | MODULE_AUTHOR("Sergei Shtylyov <sshtylyov@ru.mvista.com>"); | |
589 | MODULE_LICENSE("GPL v2"); | |
590 | ||
591 | static int __init da8xx_init(void) | |
592 | { | |
e9e8c85e | 593 | return platform_driver_register(&da8xx_driver); |
8ceae51e | 594 | } |
e9e8c85e | 595 | module_init(da8xx_init); |
8ceae51e FB |
596 | |
597 | static void __exit da8xx_exit(void) | |
598 | { | |
599 | platform_driver_unregister(&da8xx_driver); | |
600 | } | |
601 | module_exit(da8xx_exit); |