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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-11-24 14:53:35 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 13:00:02 -0500
commitb8da8677d4f88db066c1cfe34529d970a060de46 (patch)
tree2a3ecc830e655c63dd9fa9dc69959fcdb77a513a /drivers/usb
parentea99ecfdc81266e61f4445c1830315a65eb8175a (diff)
USB: move isp1301_omap to drivers/usb/otg
This moves the isp1301-omap driver from the drivers/i2c/chips directory (which will be shrinking) into a new drivers/usb/otg directory (which will grow, with more drivers and utilities). Note that OTG infrastructure needs to be initialized before either host or peripheral side USB support, and may be needed before for pure host or pure peripheral configurations. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/Kconfig2
-rw-r--r--drivers/usb/otg/Kconfig31
-rw-r--r--drivers/usb/otg/Makefile8
-rw-r--r--drivers/usb/otg/isp1301_omap.c1683
4 files changed, 1724 insertions, 0 deletions
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 289d81adfb9c..83babb0a1df7 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -150,4 +150,6 @@ source "drivers/usb/atm/Kconfig"
150 150
151source "drivers/usb/gadget/Kconfig" 151source "drivers/usb/gadget/Kconfig"
152 152
153source "drivers/usb/otg/Kconfig"
154
153endif # USB_SUPPORT 155endif # USB_SUPPORT
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
new file mode 100644
index 000000000000..860342902bbb
--- /dev/null
+++ b/drivers/usb/otg/Kconfig
@@ -0,0 +1,31 @@
1#
2# USB OTG infrastructure may be needed for peripheral-only, host-only,
3# or OTG-capable configurations when OTG transceivers or controllers
4# are used.
5#
6
7comment "OTG and related infrastructure"
8
9if USB || USB_GADGET
10
11config USB_OTG_UTILS
12 bool
13 help
14 Select this to make sure the build includes objects from
15 the OTG infrastructure directory.
16
17config ISP1301_OMAP
18 tristate "Philips ISP1301 with OMAP OTG"
19 depends on I2C && ARCH_OMAP_OTG
20 select USB_OTG_UTILS
21 help
22 If you say yes here you get support for the Philips ISP1301
23 USB-On-The-Go transceiver working with the OMAP OTG controller.
24 The ISP1301 is a full speed USB transceiver which is used in
25 products including H2, H3, and H4 development boards for Texas
26 Instruments OMAP processors.
27
28 This driver can also be built as a module. If so, the module
29 will be called isp1301_omap.
30
31endif # USB || OTG
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
new file mode 100644
index 000000000000..483816685d00
--- /dev/null
+++ b/drivers/usb/otg/Makefile
@@ -0,0 +1,8 @@
1obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
2
3ifeq ($(CONFIG_USB_DEBUG),y)
4EXTRA_CFLAGS += -DDEBUG
5else ifeq ($(CONFIG_USB_GADGET_DEBUG),y)
6EXTRA_CFLAGS += -DDEBUG
7endif
8
diff --git a/drivers/usb/otg/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c
new file mode 100644
index 000000000000..e0d56ef2bcb0
--- /dev/null
+++ b/drivers/usb/otg/isp1301_omap.c
@@ -0,0 +1,1683 @@
1/*
2 * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
3 *
4 * Copyright (C) 2004 Texas Instruments
5 * Copyright (C) 2004 David Brownell
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/init.h>
25#include <linux/slab.h>
26#include <linux/interrupt.h>
27#include <linux/platform_device.h>
28#include <linux/gpio.h>
29#include <linux/usb/ch9.h>
30#include <linux/usb/gadget.h>
31#include <linux/usb.h>
32#include <linux/usb/otg.h>
33#include <linux/i2c.h>
34#include <linux/workqueue.h>
35
36#include <asm/irq.h>
37#include <asm/mach-types.h>
38
39#include <mach/usb.h>
40#include <mach/mux.h>
41
42
43#ifndef DEBUG
44#undef VERBOSE
45#endif
46
47
48#define DRIVER_VERSION "24 August 2004"
49#define DRIVER_NAME (isp1301_driver.driver.name)
50
51MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
52MODULE_LICENSE("GPL");
53
54struct isp1301 {
55 struct otg_transceiver otg;
56 struct i2c_client *client;
57 void (*i2c_release)(struct device *dev);
58
59 int irq_type;
60
61 u32 last_otg_ctrl;
62 unsigned working:1;
63
64 struct timer_list timer;
65
66 /* use keventd context to change the state for us */
67 struct work_struct work;
68
69 unsigned long todo;
70# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
71# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
72# define WORK_HOST_RESUME 4 /* resume host */
73# define WORK_TIMER 6 /* timer fired */
74# define WORK_STOP 7 /* don't resubmit */
75};
76
77
78/* bits in OTG_CTRL */
79
80#define OTG_XCEIV_OUTPUTS \
81 (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
82#define OTG_XCEIV_INPUTS \
83 (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
84#define OTG_CTRL_BITS \
85 (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
86 /* and OTG_PULLUP is sometimes written */
87
88#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
89 OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
90 OTG_CTRL_BITS)
91
92
93/*-------------------------------------------------------------------------*/
94
95/* board-specific PM hooks */
96
97#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
98
99#if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
100
101#include <linux/i2c/tps65010.h>
102
103#else
104
105static inline int tps65010_set_vbus_draw(unsigned mA)
106{
107 pr_debug("tps65010: draw %d mA (STUB)\n", mA);
108 return 0;
109}
110
111#endif
112
113static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
114{
115 int status = tps65010_set_vbus_draw(mA);
116 if (status < 0)
117 pr_debug(" VBUS %d mA error %d\n", mA, status);
118}
119
120static void enable_vbus_source(struct isp1301 *isp)
121{
122 /* this board won't supply more than 8mA vbus power.
123 * some boards can switch a 100ma "unit load" (or more).
124 */
125}
126
127
128/* products will deliver OTG messages with LEDs, GUI, etc */
129static inline void notresponding(struct isp1301 *isp)
130{
131 printk(KERN_NOTICE "OTG device not responding.\n");
132}
133
134
135#endif
136
137#if defined(CONFIG_MACH_OMAP_H4)
138
139static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
140{
141 /* H4 controls this by DIP switch S2.4; no soft control.
142 * ON means the charger is always enabled. Leave it OFF
143 * unless the OTG port is used only in B-peripheral mode.
144 */
145}
146
147static void enable_vbus_source(struct isp1301 *isp)
148{
149 /* this board won't supply more than 8mA vbus power.
150 * some boards can switch a 100ma "unit load" (or more).
151 */
152}
153
154
155/* products will deliver OTG messages with LEDs, GUI, etc */
156static inline void notresponding(struct isp1301 *isp)
157{
158 printk(KERN_NOTICE "OTG device not responding.\n");
159}
160
161
162#endif
163
164/*-------------------------------------------------------------------------*/
165
166static struct i2c_driver isp1301_driver;
167
168/* smbus apis are used for portability */
169
170static inline u8
171isp1301_get_u8(struct isp1301 *isp, u8 reg)
172{
173 return i2c_smbus_read_byte_data(isp->client, reg + 0);
174}
175
176static inline int
177isp1301_get_u16(struct isp1301 *isp, u8 reg)
178{
179 return i2c_smbus_read_word_data(isp->client, reg);
180}
181
182static inline int
183isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
184{
185 return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
186}
187
188static inline int
189isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
190{
191 return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
192}
193
194/*-------------------------------------------------------------------------*/
195
196/* identification */
197#define ISP1301_VENDOR_ID 0x00 /* u16 read */
198#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
199#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
200
201#define I2C_VENDOR_ID_PHILIPS 0x04cc
202#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
203
204/* operational registers */
205#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
206# define MC1_SPEED (1 << 0)
207# define MC1_SUSPEND (1 << 1)
208# define MC1_DAT_SE0 (1 << 2)
209# define MC1_TRANSPARENT (1 << 3)
210# define MC1_BDIS_ACON_EN (1 << 4)
211# define MC1_OE_INT_EN (1 << 5)
212# define MC1_UART_EN (1 << 6)
213# define MC1_MASK 0x7f
214#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
215# define MC2_GLOBAL_PWR_DN (1 << 0)
216# define MC2_SPD_SUSP_CTRL (1 << 1)
217# define MC2_BI_DI (1 << 2)
218# define MC2_TRANSP_BDIR0 (1 << 3)
219# define MC2_TRANSP_BDIR1 (1 << 4)
220# define MC2_AUDIO_EN (1 << 5)
221# define MC2_PSW_EN (1 << 6)
222# define MC2_EN2V7 (1 << 7)
223#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
224# define OTG1_DP_PULLUP (1 << 0)
225# define OTG1_DM_PULLUP (1 << 1)
226# define OTG1_DP_PULLDOWN (1 << 2)
227# define OTG1_DM_PULLDOWN (1 << 3)
228# define OTG1_ID_PULLDOWN (1 << 4)
229# define OTG1_VBUS_DRV (1 << 5)
230# define OTG1_VBUS_DISCHRG (1 << 6)
231# define OTG1_VBUS_CHRG (1 << 7)
232#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
233# define OTG_B_SESS_END (1 << 6)
234# define OTG_B_SESS_VLD (1 << 7)
235
236#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
237#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
238
239#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
240#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
241
242/* same bitfields in all interrupt registers */
243# define INTR_VBUS_VLD (1 << 0)
244# define INTR_SESS_VLD (1 << 1)
245# define INTR_DP_HI (1 << 2)
246# define INTR_ID_GND (1 << 3)
247# define INTR_DM_HI (1 << 4)
248# define INTR_ID_FLOAT (1 << 5)
249# define INTR_BDIS_ACON (1 << 6)
250# define INTR_CR_INT (1 << 7)
251
252/*-------------------------------------------------------------------------*/
253
254static const char *state_string(enum usb_otg_state state)
255{
256 switch (state) {
257 case OTG_STATE_A_IDLE: return "a_idle";
258 case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
259 case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
260 case OTG_STATE_A_HOST: return "a_host";
261 case OTG_STATE_A_SUSPEND: return "a_suspend";
262 case OTG_STATE_A_PERIPHERAL: return "a_peripheral";
263 case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall";
264 case OTG_STATE_A_VBUS_ERR: return "a_vbus_err";
265 case OTG_STATE_B_IDLE: return "b_idle";
266 case OTG_STATE_B_SRP_INIT: return "b_srp_init";
267 case OTG_STATE_B_PERIPHERAL: return "b_peripheral";
268 case OTG_STATE_B_WAIT_ACON: return "b_wait_acon";
269 case OTG_STATE_B_HOST: return "b_host";
270 default: return "UNDEFINED";
271 }
272}
273
274static inline const char *state_name(struct isp1301 *isp)
275{
276 return state_string(isp->otg.state);
277}
278
279/*-------------------------------------------------------------------------*/
280
281/* NOTE: some of this ISP1301 setup is specific to H2 boards;
282 * not everything is guarded by board-specific checks, or even using
283 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
284 *
285 * ALSO: this currently doesn't use ISP1301 low-power modes
286 * while OTG is running.
287 */
288
289static void power_down(struct isp1301 *isp)
290{
291 isp->otg.state = OTG_STATE_UNDEFINED;
292
293 // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
294 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
295
296 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
297 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
298}
299
300static void power_up(struct isp1301 *isp)
301{
302 // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
303 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
304
305 /* do this only when cpu is driving transceiver,
306 * so host won't see a low speed device...
307 */
308 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
309}
310
311#define NO_HOST_SUSPEND
312
313static int host_suspend(struct isp1301 *isp)
314{
315#ifdef NO_HOST_SUSPEND
316 return 0;
317#else
318 struct device *dev;
319
320 if (!isp->otg.host)
321 return -ENODEV;
322
323 /* Currently ASSUMES only the OTG port matters;
324 * other ports could be active...
325 */
326 dev = isp->otg.host->controller;
327 return dev->driver->suspend(dev, 3, 0);
328#endif
329}
330
331static int host_resume(struct isp1301 *isp)
332{
333#ifdef NO_HOST_SUSPEND
334 return 0;
335#else
336 struct device *dev;
337
338 if (!isp->otg.host)
339 return -ENODEV;
340
341 dev = isp->otg.host->controller;
342 return dev->driver->resume(dev, 0);
343#endif
344}
345
346static int gadget_suspend(struct isp1301 *isp)
347{
348 isp->otg.gadget->b_hnp_enable = 0;
349 isp->otg.gadget->a_hnp_support = 0;
350 isp->otg.gadget->a_alt_hnp_support = 0;
351 return usb_gadget_vbus_disconnect(isp->otg.gadget);
352}
353
354/*-------------------------------------------------------------------------*/
355
356#define TIMER_MINUTES 10
357#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
358
359/* Almost all our I2C messaging comes from a work queue's task context.
360 * NOTE: guaranteeing certain response times might mean we shouldn't
361 * share keventd's work queue; a realtime task might be safest.
362 */
363static void isp1301_defer_work(struct isp1301 *isp, int work)
364{
365 int status;
366
367 if (isp && !test_and_set_bit(work, &isp->todo)) {
368 (void) get_device(&isp->client->dev);
369 status = schedule_work(&isp->work);
370 if (!status && !isp->working)
371 dev_vdbg(&isp->client->dev,
372 "work item %d may be lost\n", work);
373 }
374}
375
376/* called from irq handlers */
377static void a_idle(struct isp1301 *isp, const char *tag)
378{
379 u32 l;
380
381 if (isp->otg.state == OTG_STATE_A_IDLE)
382 return;
383
384 isp->otg.default_a = 1;
385 if (isp->otg.host) {
386 isp->otg.host->is_b_host = 0;
387 host_suspend(isp);
388 }
389 if (isp->otg.gadget) {
390 isp->otg.gadget->is_a_peripheral = 1;
391 gadget_suspend(isp);
392 }
393 isp->otg.state = OTG_STATE_A_IDLE;
394 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
395 omap_writel(l, OTG_CTRL);
396 isp->last_otg_ctrl = l;
397 pr_debug(" --> %s/%s\n", state_name(isp), tag);
398}
399
400/* called from irq handlers */
401static void b_idle(struct isp1301 *isp, const char *tag)
402{
403 u32 l;
404
405 if (isp->otg.state == OTG_STATE_B_IDLE)
406 return;
407
408 isp->otg.default_a = 0;
409 if (isp->otg.host) {
410 isp->otg.host->is_b_host = 1;
411 host_suspend(isp);
412 }
413 if (isp->otg.gadget) {
414 isp->otg.gadget->is_a_peripheral = 0;
415 gadget_suspend(isp);
416 }
417 isp->otg.state = OTG_STATE_B_IDLE;
418 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
419 omap_writel(l, OTG_CTRL);
420 isp->last_otg_ctrl = l;
421 pr_debug(" --> %s/%s\n", state_name(isp), tag);
422}
423
424static void
425dump_regs(struct isp1301 *isp, const char *label)
426{
427#ifdef DEBUG
428 u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
429 u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
430 u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
431
432 pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
433 omap_readl(OTG_CTRL), label, state_name(isp),
434 ctrl, status, src);
435 /* mode control and irq enables don't change much */
436#endif
437}
438
439/*-------------------------------------------------------------------------*/
440
441#ifdef CONFIG_USB_OTG
442
443/*
444 * The OMAP OTG controller handles most of the OTG state transitions.
445 *
446 * We translate isp1301 outputs (mostly voltage comparator status) into
447 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
448 * flags into isp1301 inputs ... and infer state transitions.
449 */
450
451#ifdef VERBOSE
452
453static void check_state(struct isp1301 *isp, const char *tag)
454{
455 enum usb_otg_state state = OTG_STATE_UNDEFINED;
456 u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
457 unsigned extra = 0;
458
459 switch (fsm) {
460
461 /* default-b */
462 case 0x0:
463 state = OTG_STATE_B_IDLE;
464 break;
465 case 0x3:
466 case 0x7:
467 extra = 1;
468 case 0x1:
469 state = OTG_STATE_B_PERIPHERAL;
470 break;
471 case 0x11:
472 state = OTG_STATE_B_SRP_INIT;
473 break;
474
475 /* extra dual-role default-b states */
476 case 0x12:
477 case 0x13:
478 case 0x16:
479 extra = 1;
480 case 0x17:
481 state = OTG_STATE_B_WAIT_ACON;
482 break;
483 case 0x34:
484 state = OTG_STATE_B_HOST;
485 break;
486
487 /* default-a */
488 case 0x36:
489 state = OTG_STATE_A_IDLE;
490 break;
491 case 0x3c:
492 state = OTG_STATE_A_WAIT_VFALL;
493 break;
494 case 0x7d:
495 state = OTG_STATE_A_VBUS_ERR;
496 break;
497 case 0x9e:
498 case 0x9f:
499 extra = 1;
500 case 0x89:
501 state = OTG_STATE_A_PERIPHERAL;
502 break;
503 case 0xb7:
504 state = OTG_STATE_A_WAIT_VRISE;
505 break;
506 case 0xb8:
507 state = OTG_STATE_A_WAIT_BCON;
508 break;
509 case 0xb9:
510 state = OTG_STATE_A_HOST;
511 break;
512 case 0xba:
513 state = OTG_STATE_A_SUSPEND;
514 break;
515 default:
516 break;
517 }
518 if (isp->otg.state == state && !extra)
519 return;
520 pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
521 state_string(state), fsm, state_name(isp),
522 omap_readl(OTG_CTRL));
523}
524
525#else
526
527static inline void check_state(struct isp1301 *isp, const char *tag) { }
528
529#endif
530
531/* outputs from ISP1301_INTERRUPT_SOURCE */
532static void update_otg1(struct isp1301 *isp, u8 int_src)
533{
534 u32 otg_ctrl;
535
536 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
537 otg_ctrl &= ~OTG_XCEIV_INPUTS;
538 otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
539
540 if (int_src & INTR_SESS_VLD)
541 otg_ctrl |= OTG_ASESSVLD;
542 else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) {
543 a_idle(isp, "vfall");
544 otg_ctrl &= ~OTG_CTRL_BITS;
545 }
546 if (int_src & INTR_VBUS_VLD)
547 otg_ctrl |= OTG_VBUSVLD;
548 if (int_src & INTR_ID_GND) { /* default-A */
549 if (isp->otg.state == OTG_STATE_B_IDLE
550 || isp->otg.state == OTG_STATE_UNDEFINED) {
551 a_idle(isp, "init");
552 return;
553 }
554 } else { /* default-B */
555 otg_ctrl |= OTG_ID;
556 if (isp->otg.state == OTG_STATE_A_IDLE
557 || isp->otg.state == OTG_STATE_UNDEFINED) {
558 b_idle(isp, "init");
559 return;
560 }
561 }
562 omap_writel(otg_ctrl, OTG_CTRL);
563}
564
565/* outputs from ISP1301_OTG_STATUS */
566static void update_otg2(struct isp1301 *isp, u8 otg_status)
567{
568 u32 otg_ctrl;
569
570 otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
571 otg_ctrl &= ~OTG_XCEIV_INPUTS;
572 otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
573 if (otg_status & OTG_B_SESS_VLD)
574 otg_ctrl |= OTG_BSESSVLD;
575 else if (otg_status & OTG_B_SESS_END)
576 otg_ctrl |= OTG_BSESSEND;
577 omap_writel(otg_ctrl, OTG_CTRL);
578}
579
580/* inputs going to ISP1301 */
581static void otg_update_isp(struct isp1301 *isp)
582{
583 u32 otg_ctrl, otg_change;
584 u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
585
586 otg_ctrl = omap_readl(OTG_CTRL);
587 otg_change = otg_ctrl ^ isp->last_otg_ctrl;
588 isp->last_otg_ctrl = otg_ctrl;
589 otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
590
591 switch (isp->otg.state) {
592 case OTG_STATE_B_IDLE:
593 case OTG_STATE_B_PERIPHERAL:
594 case OTG_STATE_B_SRP_INIT:
595 if (!(otg_ctrl & OTG_PULLUP)) {
596 // if (otg_ctrl & OTG_B_HNPEN) {
597 if (isp->otg.gadget->b_hnp_enable) {
598 isp->otg.state = OTG_STATE_B_WAIT_ACON;
599 pr_debug(" --> b_wait_acon\n");
600 }
601 goto pulldown;
602 }
603pullup:
604 set |= OTG1_DP_PULLUP;
605 clr |= OTG1_DP_PULLDOWN;
606 break;
607 case OTG_STATE_A_SUSPEND:
608 case OTG_STATE_A_PERIPHERAL:
609 if (otg_ctrl & OTG_PULLUP)
610 goto pullup;
611 /* FALLTHROUGH */
612 // case OTG_STATE_B_WAIT_ACON:
613 default:
614pulldown:
615 set |= OTG1_DP_PULLDOWN;
616 clr |= OTG1_DP_PULLUP;
617 break;
618 }
619
620# define toggle(OTG,ISP) do { \
621 if (otg_ctrl & OTG) set |= ISP; \
622 else clr |= ISP; \
623 } while (0)
624
625 if (!(isp->otg.host))
626 otg_ctrl &= ~OTG_DRV_VBUS;
627
628 switch (isp->otg.state) {
629 case OTG_STATE_A_SUSPEND:
630 if (otg_ctrl & OTG_DRV_VBUS) {
631 set |= OTG1_VBUS_DRV;
632 break;
633 }
634 /* HNP failed for some reason (A_AIDL_BDIS timeout) */
635 notresponding(isp);
636
637 /* FALLTHROUGH */
638 case OTG_STATE_A_VBUS_ERR:
639 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
640 pr_debug(" --> a_wait_vfall\n");
641 /* FALLTHROUGH */
642 case OTG_STATE_A_WAIT_VFALL:
643 /* FIXME usbcore thinks port power is still on ... */
644 clr |= OTG1_VBUS_DRV;
645 break;
646 case OTG_STATE_A_IDLE:
647 if (otg_ctrl & OTG_DRV_VBUS) {
648 isp->otg.state = OTG_STATE_A_WAIT_VRISE;
649 pr_debug(" --> a_wait_vrise\n");
650 }
651 /* FALLTHROUGH */
652 default:
653 toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
654 }
655
656 toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
657 toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
658
659# undef toggle
660
661 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
662 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
663
664 /* HNP switch to host or peripheral; and SRP */
665 if (otg_change & OTG_PULLUP) {
666 u32 l;
667
668 switch (isp->otg.state) {
669 case OTG_STATE_B_IDLE:
670 if (clr & OTG1_DP_PULLUP)
671 break;
672 isp->otg.state = OTG_STATE_B_PERIPHERAL;
673 pr_debug(" --> b_peripheral\n");
674 break;
675 case OTG_STATE_A_SUSPEND:
676 if (clr & OTG1_DP_PULLUP)
677 break;
678 isp->otg.state = OTG_STATE_A_PERIPHERAL;
679 pr_debug(" --> a_peripheral\n");
680 break;
681 default:
682 break;
683 }
684 l = omap_readl(OTG_CTRL);
685 l |= OTG_PULLUP;
686 omap_writel(l, OTG_CTRL);
687 }
688
689 check_state(isp, __func__);
690 dump_regs(isp, "otg->isp1301");
691}
692
693static irqreturn_t omap_otg_irq(int irq, void *_isp)
694{
695 u16 otg_irq = omap_readw(OTG_IRQ_SRC);
696 u32 otg_ctrl;
697 int ret = IRQ_NONE;
698 struct isp1301 *isp = _isp;
699
700 /* update ISP1301 transciever from OTG controller */
701 if (otg_irq & OPRT_CHG) {
702 omap_writew(OPRT_CHG, OTG_IRQ_SRC);
703 isp1301_defer_work(isp, WORK_UPDATE_ISP);
704 ret = IRQ_HANDLED;
705
706 /* SRP to become b_peripheral failed */
707 } else if (otg_irq & B_SRP_TMROUT) {
708 pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
709 notresponding(isp);
710
711 /* gadget drivers that care should monitor all kinds of
712 * remote wakeup (SRP, normal) using their own timer
713 * to give "check cable and A-device" messages.
714 */
715 if (isp->otg.state == OTG_STATE_B_SRP_INIT)
716 b_idle(isp, "srp_timeout");
717
718 omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
719 ret = IRQ_HANDLED;
720
721 /* HNP to become b_host failed */
722 } else if (otg_irq & B_HNP_FAIL) {
723 pr_debug("otg: %s B_HNP_FAIL, %06x\n",
724 state_name(isp), omap_readl(OTG_CTRL));
725 notresponding(isp);
726
727 otg_ctrl = omap_readl(OTG_CTRL);
728 otg_ctrl |= OTG_BUSDROP;
729 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
730 omap_writel(otg_ctrl, OTG_CTRL);
731
732 /* subset of b_peripheral()... */
733 isp->otg.state = OTG_STATE_B_PERIPHERAL;
734 pr_debug(" --> b_peripheral\n");
735
736 omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
737 ret = IRQ_HANDLED;
738
739 /* detect SRP from B-device ... */
740 } else if (otg_irq & A_SRP_DETECT) {
741 pr_debug("otg: %s SRP_DETECT, %06x\n",
742 state_name(isp), omap_readl(OTG_CTRL));
743
744 isp1301_defer_work(isp, WORK_UPDATE_OTG);
745 switch (isp->otg.state) {
746 case OTG_STATE_A_IDLE:
747 if (!isp->otg.host)
748 break;
749 isp1301_defer_work(isp, WORK_HOST_RESUME);
750 otg_ctrl = omap_readl(OTG_CTRL);
751 otg_ctrl |= OTG_A_BUSREQ;
752 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
753 & ~OTG_XCEIV_INPUTS
754 & OTG_CTRL_MASK;
755 omap_writel(otg_ctrl, OTG_CTRL);
756 break;
757 default:
758 break;
759 }
760
761 omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
762 ret = IRQ_HANDLED;
763
764 /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
765 * we don't track them separately
766 */
767 } else if (otg_irq & A_REQ_TMROUT) {
768 otg_ctrl = omap_readl(OTG_CTRL);
769 pr_info("otg: BCON_TMOUT from %s, %06x\n",
770 state_name(isp), otg_ctrl);
771 notresponding(isp);
772
773 otg_ctrl |= OTG_BUSDROP;
774 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
775 omap_writel(otg_ctrl, OTG_CTRL);
776 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
777
778 omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
779 ret = IRQ_HANDLED;
780
781 /* A-supplied voltage fell too low; overcurrent */
782 } else if (otg_irq & A_VBUS_ERR) {
783 otg_ctrl = omap_readl(OTG_CTRL);
784 printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
785 state_name(isp), otg_irq, otg_ctrl);
786
787 otg_ctrl |= OTG_BUSDROP;
788 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
789 omap_writel(otg_ctrl, OTG_CTRL);
790 isp->otg.state = OTG_STATE_A_VBUS_ERR;
791
792 omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
793 ret = IRQ_HANDLED;
794
795 /* switch driver; the transciever code activates it,
796 * ungating the udc clock or resuming OHCI.
797 */
798 } else if (otg_irq & DRIVER_SWITCH) {
799 int kick = 0;
800
801 otg_ctrl = omap_readl(OTG_CTRL);
802 printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
803 state_name(isp),
804 (otg_ctrl & OTG_DRIVER_SEL)
805 ? "gadget" : "host",
806 otg_ctrl);
807 isp1301_defer_work(isp, WORK_UPDATE_ISP);
808
809 /* role is peripheral */
810 if (otg_ctrl & OTG_DRIVER_SEL) {
811 switch (isp->otg.state) {
812 case OTG_STATE_A_IDLE:
813 b_idle(isp, __func__);
814 break;
815 default:
816 break;
817 }
818 isp1301_defer_work(isp, WORK_UPDATE_ISP);
819
820 /* role is host */
821 } else {
822 if (!(otg_ctrl & OTG_ID)) {
823 otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
824 omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
825 }
826
827 if (isp->otg.host) {
828 switch (isp->otg.state) {
829 case OTG_STATE_B_WAIT_ACON:
830 isp->otg.state = OTG_STATE_B_HOST;
831 pr_debug(" --> b_host\n");
832 kick = 1;
833 break;
834 case OTG_STATE_A_WAIT_BCON:
835 isp->otg.state = OTG_STATE_A_HOST;
836 pr_debug(" --> a_host\n");
837 break;
838 case OTG_STATE_A_PERIPHERAL:
839 isp->otg.state = OTG_STATE_A_WAIT_BCON;
840 pr_debug(" --> a_wait_bcon\n");
841 break;
842 default:
843 break;
844 }
845 isp1301_defer_work(isp, WORK_HOST_RESUME);
846 }
847 }
848
849 omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
850 ret = IRQ_HANDLED;
851
852 if (kick)
853 usb_bus_start_enum(isp->otg.host,
854 isp->otg.host->otg_port);
855 }
856
857 check_state(isp, __func__);
858 return ret;
859}
860
861static struct platform_device *otg_dev;
862
863static int otg_init(struct isp1301 *isp)
864{
865 u32 l;
866
867 if (!otg_dev)
868 return -ENODEV;
869
870 dump_regs(isp, __func__);
871 /* some of these values are board-specific... */
872 l = omap_readl(OTG_SYSCON_2);
873 l |= OTG_EN
874 /* for B-device: */
875 | SRP_GPDATA /* 9msec Bdev D+ pulse */
876 | SRP_GPDVBUS /* discharge after VBUS pulse */
877 // | (3 << 24) /* 2msec VBUS pulse */
878 /* for A-device: */
879 | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
880 | SRP_DPW /* detect 167+ns SRP pulses */
881 | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
882 ;
883 omap_writel(l, OTG_SYSCON_2);
884
885 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
886 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
887
888 check_state(isp, __func__);
889 pr_debug("otg: %s, %s %06x\n",
890 state_name(isp), __func__, omap_readl(OTG_CTRL));
891
892 omap_writew(DRIVER_SWITCH | OPRT_CHG
893 | B_SRP_TMROUT | B_HNP_FAIL
894 | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
895
896 l = omap_readl(OTG_SYSCON_2);
897 l |= OTG_EN;
898 omap_writel(l, OTG_SYSCON_2);
899
900 return 0;
901}
902
903static int otg_probe(struct platform_device *dev)
904{
905 // struct omap_usb_config *config = dev->platform_data;
906
907 otg_dev = dev;
908 return 0;
909}
910
911static int otg_remove(struct platform_device *dev)
912{
913 otg_dev = NULL;
914 return 0;
915}
916
917static struct platform_driver omap_otg_driver = {
918 .probe = otg_probe,
919 .remove = otg_remove,
920 .driver = {
921 .owner = THIS_MODULE,
922 .name = "omap_otg",
923 },
924};
925
926static int otg_bind(struct isp1301 *isp)
927{
928 int status;
929
930 if (otg_dev)
931 return -EBUSY;
932
933 status = platform_driver_register(&omap_otg_driver);
934 if (status < 0)
935 return status;
936
937 if (otg_dev)
938 status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
939 IRQF_DISABLED, DRIVER_NAME, isp);
940 else
941 status = -ENODEV;
942
943 if (status < 0)
944 platform_driver_unregister(&omap_otg_driver);
945 return status;
946}
947
948static void otg_unbind(struct isp1301 *isp)
949{
950 if (!otg_dev)
951 return;
952 free_irq(otg_dev->resource[1].start, isp);
953}
954
955#else
956
957/* OTG controller isn't clocked */
958
959#endif /* CONFIG_USB_OTG */
960
961/*-------------------------------------------------------------------------*/
962
963static void b_peripheral(struct isp1301 *isp)
964{
965 u32 l;
966
967 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
968 omap_writel(l, OTG_CTRL);
969
970 usb_gadget_vbus_connect(isp->otg.gadget);
971
972#ifdef CONFIG_USB_OTG
973 enable_vbus_draw(isp, 8);
974 otg_update_isp(isp);
975#else
976 enable_vbus_draw(isp, 100);
977 /* UDC driver just set OTG_BSESSVLD */
978 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
979 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
980 isp->otg.state = OTG_STATE_B_PERIPHERAL;
981 pr_debug(" --> b_peripheral\n");
982 dump_regs(isp, "2periph");
983#endif
984}
985
986static void isp_update_otg(struct isp1301 *isp, u8 stat)
987{
988 u8 isp_stat, isp_bstat;
989 enum usb_otg_state state = isp->otg.state;
990
991 if (stat & INTR_BDIS_ACON)
992 pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
993
994 /* start certain state transitions right away */
995 isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
996 if (isp_stat & INTR_ID_GND) {
997 if (isp->otg.default_a) {
998 switch (state) {
999 case OTG_STATE_B_IDLE:
1000 a_idle(isp, "idle");
1001 /* FALLTHROUGH */
1002 case OTG_STATE_A_IDLE:
1003 enable_vbus_source(isp);
1004 /* FALLTHROUGH */
1005 case OTG_STATE_A_WAIT_VRISE:
1006 /* we skip over OTG_STATE_A_WAIT_BCON, since
1007 * the HC will transition to A_HOST (or
1008 * A_SUSPEND!) without our noticing except
1009 * when HNP is used.
1010 */
1011 if (isp_stat & INTR_VBUS_VLD)
1012 isp->otg.state = OTG_STATE_A_HOST;
1013 break;
1014 case OTG_STATE_A_WAIT_VFALL:
1015 if (!(isp_stat & INTR_SESS_VLD))
1016 a_idle(isp, "vfell");
1017 break;
1018 default:
1019 if (!(isp_stat & INTR_VBUS_VLD))
1020 isp->otg.state = OTG_STATE_A_VBUS_ERR;
1021 break;
1022 }
1023 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1024 } else {
1025 switch (state) {
1026 case OTG_STATE_B_PERIPHERAL:
1027 case OTG_STATE_B_HOST:
1028 case OTG_STATE_B_WAIT_ACON:
1029 usb_gadget_vbus_disconnect(isp->otg.gadget);
1030 break;
1031 default:
1032 break;
1033 }
1034 if (state != OTG_STATE_A_IDLE)
1035 a_idle(isp, "id");
1036 if (isp->otg.host && state == OTG_STATE_A_IDLE)
1037 isp1301_defer_work(isp, WORK_HOST_RESUME);
1038 isp_bstat = 0;
1039 }
1040 } else {
1041 u32 l;
1042
1043 /* if user unplugged mini-A end of cable,
1044 * don't bypass A_WAIT_VFALL.
1045 */
1046 if (isp->otg.default_a) {
1047 switch (state) {
1048 default:
1049 isp->otg.state = OTG_STATE_A_WAIT_VFALL;
1050 break;
1051 case OTG_STATE_A_WAIT_VFALL:
1052 state = OTG_STATE_A_IDLE;
1053 /* khubd may take a while to notice and
1054 * handle this disconnect, so don't go
1055 * to B_IDLE quite yet.
1056 */
1057 break;
1058 case OTG_STATE_A_IDLE:
1059 host_suspend(isp);
1060 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
1061 MC1_BDIS_ACON_EN);
1062 isp->otg.state = OTG_STATE_B_IDLE;
1063 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1064 l &= ~OTG_CTRL_BITS;
1065 omap_writel(l, OTG_CTRL);
1066 break;
1067 case OTG_STATE_B_IDLE:
1068 break;
1069 }
1070 }
1071 isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
1072
1073 switch (isp->otg.state) {
1074 case OTG_STATE_B_PERIPHERAL:
1075 case OTG_STATE_B_WAIT_ACON:
1076 case OTG_STATE_B_HOST:
1077 if (likely(isp_bstat & OTG_B_SESS_VLD))
1078 break;
1079 enable_vbus_draw(isp, 0);
1080#ifndef CONFIG_USB_OTG
1081 /* UDC driver will clear OTG_BSESSVLD */
1082 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1083 OTG1_DP_PULLDOWN);
1084 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1085 OTG1_DP_PULLUP);
1086 dump_regs(isp, __func__);
1087#endif
1088 /* FALLTHROUGH */
1089 case OTG_STATE_B_SRP_INIT:
1090 b_idle(isp, __func__);
1091 l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
1092 omap_writel(l, OTG_CTRL);
1093 /* FALLTHROUGH */
1094 case OTG_STATE_B_IDLE:
1095 if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) {
1096#ifdef CONFIG_USB_OTG
1097 update_otg1(isp, isp_stat);
1098 update_otg2(isp, isp_bstat);
1099#endif
1100 b_peripheral(isp);
1101 } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
1102 isp_bstat |= OTG_B_SESS_END;
1103 break;
1104 case OTG_STATE_A_WAIT_VFALL:
1105 break;
1106 default:
1107 pr_debug("otg: unsupported b-device %s\n",
1108 state_name(isp));
1109 break;
1110 }
1111 }
1112
1113 if (state != isp->otg.state)
1114 pr_debug(" isp, %s -> %s\n",
1115 state_string(state), state_name(isp));
1116
1117#ifdef CONFIG_USB_OTG
1118 /* update the OTG controller state to match the isp1301; may
1119 * trigger OPRT_CHG irqs for changes going to the isp1301.
1120 */
1121 update_otg1(isp, isp_stat);
1122 update_otg2(isp, isp_bstat);
1123 check_state(isp, __func__);
1124#endif
1125
1126 dump_regs(isp, "isp1301->otg");
1127}
1128
1129/*-------------------------------------------------------------------------*/
1130
1131static u8 isp1301_clear_latch(struct isp1301 *isp)
1132{
1133 u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
1134 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
1135 return latch;
1136}
1137
1138static void
1139isp1301_work(struct work_struct *work)
1140{
1141 struct isp1301 *isp = container_of(work, struct isp1301, work);
1142 int stop;
1143
1144 /* implicit lock: we're the only task using this device */
1145 isp->working = 1;
1146 do {
1147 stop = test_bit(WORK_STOP, &isp->todo);
1148
1149#ifdef CONFIG_USB_OTG
1150 /* transfer state from otg engine to isp1301 */
1151 if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
1152 otg_update_isp(isp);
1153 put_device(&isp->client->dev);
1154 }
1155#endif
1156 /* transfer state from isp1301 to otg engine */
1157 if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
1158 u8 stat = isp1301_clear_latch(isp);
1159
1160 isp_update_otg(isp, stat);
1161 put_device(&isp->client->dev);
1162 }
1163
1164 if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
1165 u32 otg_ctrl;
1166
1167 /*
1168 * skip A_WAIT_VRISE; hc transitions invisibly
1169 * skip A_WAIT_BCON; same.
1170 */
1171 switch (isp->otg.state) {
1172 case OTG_STATE_A_WAIT_BCON:
1173 case OTG_STATE_A_WAIT_VRISE:
1174 isp->otg.state = OTG_STATE_A_HOST;
1175 pr_debug(" --> a_host\n");
1176 otg_ctrl = omap_readl(OTG_CTRL);
1177 otg_ctrl |= OTG_A_BUSREQ;
1178 otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
1179 & OTG_CTRL_MASK;
1180 omap_writel(otg_ctrl, OTG_CTRL);
1181 break;
1182 case OTG_STATE_B_WAIT_ACON:
1183 isp->otg.state = OTG_STATE_B_HOST;
1184 pr_debug(" --> b_host (acon)\n");
1185 break;
1186 case OTG_STATE_B_HOST:
1187 case OTG_STATE_B_IDLE:
1188 case OTG_STATE_A_IDLE:
1189 break;
1190 default:
1191 pr_debug(" host resume in %s\n",
1192 state_name(isp));
1193 }
1194 host_resume(isp);
1195 // mdelay(10);
1196 put_device(&isp->client->dev);
1197 }
1198
1199 if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
1200#ifdef VERBOSE
1201 dump_regs(isp, "timer");
1202 if (!stop)
1203 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1204#endif
1205 put_device(&isp->client->dev);
1206 }
1207
1208 if (isp->todo)
1209 dev_vdbg(&isp->client->dev,
1210 "work done, todo = 0x%lx\n",
1211 isp->todo);
1212 if (stop) {
1213 dev_dbg(&isp->client->dev, "stop\n");
1214 break;
1215 }
1216 } while (isp->todo);
1217 isp->working = 0;
1218}
1219
1220static irqreturn_t isp1301_irq(int irq, void *isp)
1221{
1222 isp1301_defer_work(isp, WORK_UPDATE_OTG);
1223 return IRQ_HANDLED;
1224}
1225
1226static void isp1301_timer(unsigned long _isp)
1227{
1228 isp1301_defer_work((void *)_isp, WORK_TIMER);
1229}
1230
1231/*-------------------------------------------------------------------------*/
1232
1233static void isp1301_release(struct device *dev)
1234{
1235 struct isp1301 *isp;
1236
1237 isp = dev_get_drvdata(dev);
1238
1239 /* FIXME -- not with a "new style" driver, it doesn't!! */
1240
1241 /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
1242 if (isp->i2c_release)
1243 isp->i2c_release(dev);
1244 kfree (isp);
1245}
1246
1247static struct isp1301 *the_transceiver;
1248
1249static int __exit isp1301_remove(struct i2c_client *i2c)
1250{
1251 struct isp1301 *isp;
1252
1253 isp = i2c_get_clientdata(i2c);
1254
1255 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1256 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1257 free_irq(i2c->irq, isp);
1258#ifdef CONFIG_USB_OTG
1259 otg_unbind(isp);
1260#endif
1261 if (machine_is_omap_h2())
1262 gpio_free(2);
1263
1264 isp->timer.data = 0;
1265 set_bit(WORK_STOP, &isp->todo);
1266 del_timer_sync(&isp->timer);
1267 flush_scheduled_work();
1268
1269 put_device(&i2c->dev);
1270 the_transceiver = NULL;
1271
1272 return 0;
1273}
1274
1275/*-------------------------------------------------------------------------*/
1276
1277/* NOTE: three modes are possible here, only one of which
1278 * will be standards-conformant on any given system:
1279 *
1280 * - OTG mode (dual-role), required if there's a Mini-AB connector
1281 * - HOST mode, for when there's one or more A (host) connectors
1282 * - DEVICE mode, for when there's a B/Mini-B (device) connector
1283 *
1284 * As a rule, you won't have an isp1301 chip unless it's there to
1285 * support the OTG mode. Other modes help testing USB controllers
1286 * in isolation from (full) OTG support, or maybe so later board
1287 * revisions can help to support those feature.
1288 */
1289
1290#ifdef CONFIG_USB_OTG
1291
1292static int isp1301_otg_enable(struct isp1301 *isp)
1293{
1294 power_up(isp);
1295 otg_init(isp);
1296
1297 /* NOTE: since we don't change this, this provides
1298 * a few more interrupts than are strictly needed.
1299 */
1300 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1301 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1302 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1303 INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
1304
1305 dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
1306
1307 return 0;
1308}
1309
1310#endif
1311
1312/* add or disable the host device+driver */
1313static int
1314isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
1315{
1316 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1317
1318 if (!otg || isp != the_transceiver)
1319 return -ENODEV;
1320
1321 if (!host) {
1322 omap_writew(0, OTG_IRQ_EN);
1323 power_down(isp);
1324 isp->otg.host = NULL;
1325 return 0;
1326 }
1327
1328#ifdef CONFIG_USB_OTG
1329 isp->otg.host = host;
1330 dev_dbg(&isp->client->dev, "registered host\n");
1331 host_suspend(isp);
1332 if (isp->otg.gadget)
1333 return isp1301_otg_enable(isp);
1334 return 0;
1335
1336#elif !defined(CONFIG_USB_GADGET_OMAP)
1337 // FIXME update its refcount
1338 isp->otg.host = host;
1339
1340 power_up(isp);
1341
1342 if (machine_is_omap_h2())
1343 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1344
1345 dev_info(&isp->client->dev, "A-Host sessions ok\n");
1346 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1347 INTR_ID_GND);
1348 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1349 INTR_ID_GND);
1350
1351 /* If this has a Mini-AB connector, this mode is highly
1352 * nonstandard ... but can be handy for testing, especially with
1353 * the Mini-A end of an OTG cable. (Or something nonstandard
1354 * like MiniB-to-StandardB, maybe built with a gender mender.)
1355 */
1356 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
1357
1358 dump_regs(isp, __func__);
1359
1360 return 0;
1361
1362#else
1363 dev_dbg(&isp->client->dev, "host sessions not allowed\n");
1364 return -EINVAL;
1365#endif
1366
1367}
1368
1369static int
1370isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
1371{
1372 struct isp1301 *isp = container_of(otg, struct isp1301, otg);
1373#ifndef CONFIG_USB_OTG
1374 u32 l;
1375#endif
1376
1377 if (!otg || isp != the_transceiver)
1378 return -ENODEV;
1379
1380 if (!gadget) {
1381 omap_writew(0, OTG_IRQ_EN);
1382 if (!isp->otg.default_a)
1383 enable_vbus_draw(isp, 0);
1384 usb_gadget_vbus_disconnect(isp->otg.gadget);
1385 isp->otg.gadget = NULL;
1386 power_down(isp);
1387 return 0;
1388 }
1389
1390#ifdef CONFIG_USB_OTG
1391 isp->otg.gadget = gadget;
1392 dev_dbg(&isp->client->dev, "registered gadget\n");
1393 /* gadget driver may be suspended until vbus_connect () */
1394 if (isp->otg.host)
1395 return isp1301_otg_enable(isp);
1396 return 0;
1397
1398#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1399 isp->otg.gadget = gadget;
1400 // FIXME update its refcount
1401
1402 l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
1403 l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
1404 l |= OTG_ID;
1405 omap_writel(l, OTG_CTRL);
1406
1407 power_up(isp);
1408 isp->otg.state = OTG_STATE_B_IDLE;
1409
1410 if (machine_is_omap_h2() || machine_is_omap_h3())
1411 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
1412
1413 isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1414 INTR_SESS_VLD);
1415 isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1416 INTR_VBUS_VLD);
1417 dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1418 dump_regs(isp, __func__);
1419
1420 /* If this has a Mini-AB connector, this mode is highly
1421 * nonstandard ... but can be handy for testing, so long
1422 * as you don't plug a Mini-A cable into the jack.
1423 */
1424 if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
1425 b_peripheral(isp);
1426
1427 return 0;
1428
1429#else
1430 dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
1431 return -EINVAL;
1432#endif
1433}
1434
1435
1436/*-------------------------------------------------------------------------*/
1437
1438static int
1439isp1301_set_power(struct otg_transceiver *dev, unsigned mA)
1440{
1441 if (!the_transceiver)
1442 return -ENODEV;
1443 if (dev->state == OTG_STATE_B_PERIPHERAL)
1444 enable_vbus_draw(the_transceiver, mA);
1445 return 0;
1446}
1447
1448static int
1449isp1301_start_srp(struct otg_transceiver *dev)
1450{
1451 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1452 u32 otg_ctrl;
1453
1454 if (!dev || isp != the_transceiver
1455 || isp->otg.state != OTG_STATE_B_IDLE)
1456 return -ENODEV;
1457
1458 otg_ctrl = omap_readl(OTG_CTRL);
1459 if (!(otg_ctrl & OTG_BSESSEND))
1460 return -EINVAL;
1461
1462 otg_ctrl |= OTG_B_BUSREQ;
1463 otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1464 omap_writel(otg_ctrl, OTG_CTRL);
1465 isp->otg.state = OTG_STATE_B_SRP_INIT;
1466
1467 pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
1468 omap_readl(OTG_CTRL));
1469#ifdef CONFIG_USB_OTG
1470 check_state(isp, __func__);
1471#endif
1472 return 0;
1473}
1474
1475static int
1476isp1301_start_hnp(struct otg_transceiver *dev)
1477{
1478#ifdef CONFIG_USB_OTG
1479 struct isp1301 *isp = container_of(dev, struct isp1301, otg);
1480 u32 l;
1481
1482 if (!dev || isp != the_transceiver)
1483 return -ENODEV;
1484 if (isp->otg.default_a && (isp->otg.host == NULL
1485 || !isp->otg.host->b_hnp_enable))
1486 return -ENOTCONN;
1487 if (!isp->otg.default_a && (isp->otg.gadget == NULL
1488 || !isp->otg.gadget->b_hnp_enable))
1489 return -ENOTCONN;
1490
1491 /* We want hardware to manage most HNP protocol timings.
1492 * So do this part as early as possible...
1493 */
1494 switch (isp->otg.state) {
1495 case OTG_STATE_B_HOST:
1496 isp->otg.state = OTG_STATE_B_PERIPHERAL;
1497 /* caller will suspend next */
1498 break;
1499 case OTG_STATE_A_HOST:
1500#if 0
1501 /* autoconnect mode avoids irq latency bugs */
1502 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1503 MC1_BDIS_ACON_EN);
1504#endif
1505 /* caller must suspend then clear A_BUSREQ */
1506 usb_gadget_vbus_connect(isp->otg.gadget);
1507 l = omap_readl(OTG_CTRL);
1508 l |= OTG_A_SETB_HNPEN;
1509 omap_writel(l, OTG_CTRL);
1510
1511 break;
1512 case OTG_STATE_A_PERIPHERAL:
1513 /* initiated by B-Host suspend */
1514 break;
1515 default:
1516 return -EILSEQ;
1517 }
1518 pr_debug("otg: HNP %s, %06x ...\n",
1519 state_name(isp), omap_readl(OTG_CTRL));
1520 check_state(isp, __func__);
1521 return 0;
1522#else
1523 /* srp-only */
1524 return -EINVAL;
1525#endif
1526}
1527
1528/*-------------------------------------------------------------------------*/
1529
1530static int __init
1531isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
1532{
1533 int status;
1534 struct isp1301 *isp;
1535
1536 if (the_transceiver)
1537 return 0;
1538
1539 isp = kzalloc(sizeof *isp, GFP_KERNEL);
1540 if (!isp)
1541 return 0;
1542
1543 INIT_WORK(&isp->work, isp1301_work);
1544 init_timer(&isp->timer);
1545 isp->timer.function = isp1301_timer;
1546 isp->timer.data = (unsigned long) isp;
1547
1548 i2c_set_clientdata(i2c, isp);
1549 isp->client = i2c;
1550
1551 /* verify the chip (shouldn't be necesary) */
1552 status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
1553 if (status != I2C_VENDOR_ID_PHILIPS) {
1554 dev_dbg(&i2c->dev, "not philips id: %d\n", status);
1555 goto fail;
1556 }
1557 status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
1558 if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
1559 dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
1560 goto fail;
1561 }
1562 isp->i2c_release = i2c->dev.release;
1563 i2c->dev.release = isp1301_release;
1564
1565 /* initial development used chiprev 2.00 */
1566 status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
1567 dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
1568 status >> 8, status & 0xff);
1569
1570 /* make like power-on reset */
1571 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
1572
1573 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
1574 isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
1575
1576 isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
1577 OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
1578 isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
1579 ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
1580
1581 isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
1582 isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
1583 isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1584
1585#ifdef CONFIG_USB_OTG
1586 status = otg_bind(isp);
1587 if (status < 0) {
1588 dev_dbg(&i2c->dev, "can't bind OTG\n");
1589 goto fail;
1590 }
1591#endif
1592
1593 if (machine_is_omap_h2()) {
1594 /* full speed signaling by default */
1595 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
1596 MC1_SPEED);
1597 isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
1598 MC2_SPD_SUSP_CTRL);
1599
1600 /* IRQ wired at M14 */
1601 omap_cfg_reg(M14_1510_GPIO2);
1602 if (gpio_request(2, "isp1301") == 0)
1603 gpio_direction_input(2);
1604 isp->irq_type = IRQF_TRIGGER_FALLING;
1605 }
1606
1607 isp->irq_type |= IRQF_SAMPLE_RANDOM;
1608 status = request_irq(i2c->irq, isp1301_irq,
1609 isp->irq_type, DRIVER_NAME, isp);
1610 if (status < 0) {
1611 dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1612 i2c->irq, status);
1613 goto fail;
1614 }
1615
1616 isp->otg.dev = &i2c->dev;
1617 isp->otg.label = DRIVER_NAME;
1618
1619 isp->otg.set_host = isp1301_set_host,
1620 isp->otg.set_peripheral = isp1301_set_peripheral,
1621 isp->otg.set_power = isp1301_set_power,
1622 isp->otg.start_srp = isp1301_start_srp,
1623 isp->otg.start_hnp = isp1301_start_hnp,
1624
1625 enable_vbus_draw(isp, 0);
1626 power_down(isp);
1627 the_transceiver = isp;
1628
1629#ifdef CONFIG_USB_OTG
1630 update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
1631 update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
1632#endif
1633
1634 dump_regs(isp, __func__);
1635
1636#ifdef VERBOSE
1637 mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
1638 dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
1639#endif
1640
1641 status = otg_set_transceiver(&isp->otg);
1642 if (status < 0)
1643 dev_err(&i2c->dev, "can't register transceiver, %d\n",
1644 status);
1645
1646 return 0;
1647
1648fail:
1649 kfree(isp);
1650 return -ENODEV;
1651}
1652
1653static const struct i2c_device_id isp1301_id[] = {
1654 { "isp1301_omap", 0 },
1655 { }
1656};
1657MODULE_DEVICE_TABLE(i2c, isp1301_id);
1658
1659static struct i2c_driver isp1301_driver = {
1660 .driver = {
1661 .name = "isp1301_omap",
1662 },
1663 .probe = isp1301_probe,
1664 .remove = __exit_p(isp1301_remove),
1665 .id_table = isp1301_id,
1666};
1667
1668/*-------------------------------------------------------------------------*/
1669
1670static int __init isp_init(void)
1671{
1672 return i2c_add_driver(&isp1301_driver);
1673}
1674module_init(isp_init);
1675
1676static void __exit isp_exit(void)
1677{
1678 if (the_transceiver)
1679 otg_set_transceiver(NULL);
1680 i2c_del_driver(&isp1301_driver);
1681}
1682module_exit(isp_exit);
1683
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 12:03:43 -0500