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-rw-r--r--drivers/usb/host/ehci-omap.c794
1 files changed, 794 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
new file mode 100644
index 000000000000..40a858335035
--- /dev/null
+++ b/drivers/usb/host/ehci-omap.c
@@ -0,0 +1,794 @@
1/*
2 * ehci-omap.c - driver for USBHOST on OMAP 34xx processor
3 *
4 * Bus Glue for OMAP34xx USBHOST 3 port EHCI controller
5 * Tested on OMAP3430 ES2.0 SDP
6 *
7 * Copyright (C) 2007-2008 Texas Instruments, Inc.
8 * Author: Vikram Pandita <vikram.pandita@ti.com>
9 *
10 * Copyright (C) 2009 Nokia Corporation
11 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
12 *
13 * Based on "ehci-fsl.c" and "ehci-au1xxx.c" ehci glue layers
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 *
29 * TODO (last updated Feb 12, 2010):
30 * - add kernel-doc
31 * - enable AUTOIDLE
32 * - add suspend/resume
33 * - move workarounds to board-files
34 */
35
36#include <linux/platform_device.h>
37#include <linux/clk.h>
38#include <linux/gpio.h>
39#include <linux/regulator/consumer.h>
40#include <linux/slab.h>
41#include <plat/usb.h>
42
43/*
44 * OMAP USBHOST Register addresses: VIRTUAL ADDRESSES
45 * Use ehci_omap_readl()/ehci_omap_writel() functions
46 */
47
48/* TLL Register Set */
49#define OMAP_USBTLL_REVISION (0x00)
50#define OMAP_USBTLL_SYSCONFIG (0x10)
51#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
52#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
53#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
54#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
55#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
56
57#define OMAP_USBTLL_SYSSTATUS (0x14)
58#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
59
60#define OMAP_USBTLL_IRQSTATUS (0x18)
61#define OMAP_USBTLL_IRQENABLE (0x1C)
62
63#define OMAP_TLL_SHARED_CONF (0x30)
64#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
65#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
66#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
67#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
68#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
69
70#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
71#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
72#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
73#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
74#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
75#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
76
77#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
78#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
79#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
80#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
81#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
82#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
83#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
84#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
85#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
86
87#define OMAP_TLL_CHANNEL_COUNT 3
88#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 1)
89#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 2)
90#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 4)
91
92/* UHH Register Set */
93#define OMAP_UHH_REVISION (0x00)
94#define OMAP_UHH_SYSCONFIG (0x10)
95#define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12)
96#define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8)
97#define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3)
98#define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2)
99#define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1)
100#define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0)
101
102#define OMAP_UHH_SYSSTATUS (0x14)
103#define OMAP_UHH_HOSTCONFIG (0x40)
104#define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0)
105#define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0)
106#define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11)
107#define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12)
108#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2)
109#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3)
110#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4)
111#define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5)
112#define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8)
113#define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9)
114#define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10)
115
116#define OMAP_UHH_DEBUG_CSR (0x44)
117
118/* EHCI Register Set */
119#define EHCI_INSNREG05_ULPI (0xA4)
120#define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31
121#define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24
122#define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22
123#define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16
124#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
125#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
126
127/*-------------------------------------------------------------------------*/
128
129static inline void ehci_omap_writel(void __iomem *base, u32 reg, u32 val)
130{
131 __raw_writel(val, base + reg);
132}
133
134static inline u32 ehci_omap_readl(void __iomem *base, u32 reg)
135{
136 return __raw_readl(base + reg);
137}
138
139static inline void ehci_omap_writeb(void __iomem *base, u8 reg, u8 val)
140{
141 __raw_writeb(val, base + reg);
142}
143
144static inline u8 ehci_omap_readb(void __iomem *base, u8 reg)
145{
146 return __raw_readb(base + reg);
147}
148
149/*-------------------------------------------------------------------------*/
150
151struct ehci_hcd_omap {
152 struct ehci_hcd *ehci;
153 struct device *dev;
154
155 struct clk *usbhost_ick;
156 struct clk *usbhost2_120m_fck;
157 struct clk *usbhost1_48m_fck;
158 struct clk *usbtll_fck;
159 struct clk *usbtll_ick;
160
161 /* FIXME the following two workarounds are
162 * board specific not silicon-specific so these
163 * should be moved to board-file instead.
164 *
165 * Maybe someone from TI will know better which
166 * board is affected and needs the workarounds
167 * to be applied
168 */
169
170 /* gpio for resetting phy */
171 int reset_gpio_port[OMAP3_HS_USB_PORTS];
172
173 /* phy reset workaround */
174 int phy_reset;
175
176 /* desired phy_mode: TLL, PHY */
177 enum ehci_hcd_omap_mode port_mode[OMAP3_HS_USB_PORTS];
178
179 void __iomem *uhh_base;
180 void __iomem *tll_base;
181 void __iomem *ehci_base;
182
183 /* Regulators for USB PHYs.
184 * Each PHY can have a seperate regulator.
185 */
186 struct regulator *regulator[OMAP3_HS_USB_PORTS];
187};
188
189/*-------------------------------------------------------------------------*/
190
191static void omap_usb_utmi_init(struct ehci_hcd_omap *omap, u8 tll_channel_mask)
192{
193 unsigned reg;
194 int i;
195
196 /* Program the 3 TLL channels upfront */
197 for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
198 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
199
200 /* Disable AutoIdle, BitStuffing and use SDR Mode */
201 reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
202 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
203 | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
204 ehci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
205 }
206
207 /* Program Common TLL register */
208 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_SHARED_CONF);
209 reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
210 | OMAP_TLL_SHARED_CONF_USB_DIVRATION
211 | OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN);
212 reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
213
214 ehci_omap_writel(omap->tll_base, OMAP_TLL_SHARED_CONF, reg);
215
216 /* Enable channels now */
217 for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
218 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
219
220 /* Enable only the reg that is needed */
221 if (!(tll_channel_mask & 1<<i))
222 continue;
223
224 reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
225 ehci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
226
227 ehci_omap_writeb(omap->tll_base,
228 OMAP_TLL_ULPI_SCRATCH_REGISTER(i), 0xbe);
229 dev_dbg(omap->dev, "ULPI_SCRATCH_REG[ch=%d]= 0x%02x\n",
230 i+1, ehci_omap_readb(omap->tll_base,
231 OMAP_TLL_ULPI_SCRATCH_REGISTER(i)));
232 }
233}
234
235/*-------------------------------------------------------------------------*/
236
237/* omap_start_ehc
238 * - Start the TI USBHOST controller
239 */
240static int omap_start_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd)
241{
242 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
243 u8 tll_ch_mask = 0;
244 unsigned reg = 0;
245 int ret = 0;
246
247 dev_dbg(omap->dev, "starting TI EHCI USB Controller\n");
248
249 /* Enable Clocks for USBHOST */
250 omap->usbhost_ick = clk_get(omap->dev, "usbhost_ick");
251 if (IS_ERR(omap->usbhost_ick)) {
252 ret = PTR_ERR(omap->usbhost_ick);
253 goto err_host_ick;
254 }
255 clk_enable(omap->usbhost_ick);
256
257 omap->usbhost2_120m_fck = clk_get(omap->dev, "usbhost_120m_fck");
258 if (IS_ERR(omap->usbhost2_120m_fck)) {
259 ret = PTR_ERR(omap->usbhost2_120m_fck);
260 goto err_host_120m_fck;
261 }
262 clk_enable(omap->usbhost2_120m_fck);
263
264 omap->usbhost1_48m_fck = clk_get(omap->dev, "usbhost_48m_fck");
265 if (IS_ERR(omap->usbhost1_48m_fck)) {
266 ret = PTR_ERR(omap->usbhost1_48m_fck);
267 goto err_host_48m_fck;
268 }
269 clk_enable(omap->usbhost1_48m_fck);
270
271 if (omap->phy_reset) {
272 /* Refer: ISSUE1 */
273 if (gpio_is_valid(omap->reset_gpio_port[0])) {
274 gpio_request(omap->reset_gpio_port[0],
275 "USB1 PHY reset");
276 gpio_direction_output(omap->reset_gpio_port[0], 0);
277 }
278
279 if (gpio_is_valid(omap->reset_gpio_port[1])) {
280 gpio_request(omap->reset_gpio_port[1],
281 "USB2 PHY reset");
282 gpio_direction_output(omap->reset_gpio_port[1], 0);
283 }
284
285 /* Hold the PHY in RESET for enough time till DIR is high */
286 udelay(10);
287 }
288
289 /* Configure TLL for 60Mhz clk for ULPI */
290 omap->usbtll_fck = clk_get(omap->dev, "usbtll_fck");
291 if (IS_ERR(omap->usbtll_fck)) {
292 ret = PTR_ERR(omap->usbtll_fck);
293 goto err_tll_fck;
294 }
295 clk_enable(omap->usbtll_fck);
296
297 omap->usbtll_ick = clk_get(omap->dev, "usbtll_ick");
298 if (IS_ERR(omap->usbtll_ick)) {
299 ret = PTR_ERR(omap->usbtll_ick);
300 goto err_tll_ick;
301 }
302 clk_enable(omap->usbtll_ick);
303
304 /* perform TLL soft reset, and wait until reset is complete */
305 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
306 OMAP_USBTLL_SYSCONFIG_SOFTRESET);
307
308 /* Wait for TLL reset to complete */
309 while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
310 & OMAP_USBTLL_SYSSTATUS_RESETDONE)) {
311 cpu_relax();
312
313 if (time_after(jiffies, timeout)) {
314 dev_dbg(omap->dev, "operation timed out\n");
315 ret = -EINVAL;
316 goto err_sys_status;
317 }
318 }
319
320 dev_dbg(omap->dev, "TLL RESET DONE\n");
321
322 /* (1<<3) = no idle mode only for initial debugging */
323 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
324 OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
325 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
326 OMAP_USBTLL_SYSCONFIG_CACTIVITY);
327
328
329 /* Put UHH in NoIdle/NoStandby mode */
330 reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSCONFIG);
331 reg |= (OMAP_UHH_SYSCONFIG_ENAWAKEUP
332 | OMAP_UHH_SYSCONFIG_SIDLEMODE
333 | OMAP_UHH_SYSCONFIG_CACTIVITY
334 | OMAP_UHH_SYSCONFIG_MIDLEMODE);
335 reg &= ~OMAP_UHH_SYSCONFIG_AUTOIDLE;
336
337 ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, reg);
338
339 reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
340
341 /* setup ULPI bypass and burst configurations */
342 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
343 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
344 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
345 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
346
347 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_UNKNOWN)
348 reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
349 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_UNKNOWN)
350 reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
351 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_UNKNOWN)
352 reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
353
354 /* Bypass the TLL module for PHY mode operation */
355 if (omap_rev() <= OMAP3430_REV_ES2_1) {
356 dev_dbg(omap->dev, "OMAP3 ES version <= ES2.1 \n");
357 if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY) ||
358 (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY) ||
359 (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY))
360 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
361 else
362 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
363 } else {
364 dev_dbg(omap->dev, "OMAP3 ES version > ES2.1\n");
365 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY)
366 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
367 else if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL)
368 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
369
370 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY)
371 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
372 else if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL)
373 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
374
375 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY)
376 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
377 else if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)
378 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
379
380 }
381 ehci_omap_writel(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
382 dev_dbg(omap->dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
383
384
385 if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL) ||
386 (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL) ||
387 (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)) {
388
389 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL)
390 tll_ch_mask |= OMAP_TLL_CHANNEL_1_EN_MASK;
391 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL)
392 tll_ch_mask |= OMAP_TLL_CHANNEL_2_EN_MASK;
393 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)
394 tll_ch_mask |= OMAP_TLL_CHANNEL_3_EN_MASK;
395
396 /* Enable UTMI mode for required TLL channels */
397 omap_usb_utmi_init(omap, tll_ch_mask);
398 }
399
400 if (omap->phy_reset) {
401 /* Refer ISSUE1:
402 * Hold the PHY in RESET for enough time till
403 * PHY is settled and ready
404 */
405 udelay(10);
406
407 if (gpio_is_valid(omap->reset_gpio_port[0]))
408 gpio_set_value(omap->reset_gpio_port[0], 1);
409
410 if (gpio_is_valid(omap->reset_gpio_port[1]))
411 gpio_set_value(omap->reset_gpio_port[1], 1);
412 }
413
414 return 0;
415
416err_sys_status:
417 clk_disable(omap->usbtll_ick);
418 clk_put(omap->usbtll_ick);
419
420err_tll_ick:
421 clk_disable(omap->usbtll_fck);
422 clk_put(omap->usbtll_fck);
423
424err_tll_fck:
425 clk_disable(omap->usbhost1_48m_fck);
426 clk_put(omap->usbhost1_48m_fck);
427
428 if (omap->phy_reset) {
429 if (gpio_is_valid(omap->reset_gpio_port[0]))
430 gpio_free(omap->reset_gpio_port[0]);
431
432 if (gpio_is_valid(omap->reset_gpio_port[1]))
433 gpio_free(omap->reset_gpio_port[1]);
434 }
435
436err_host_48m_fck:
437 clk_disable(omap->usbhost2_120m_fck);
438 clk_put(omap->usbhost2_120m_fck);
439
440err_host_120m_fck:
441 clk_disable(omap->usbhost_ick);
442 clk_put(omap->usbhost_ick);
443
444err_host_ick:
445 return ret;
446}
447
448static void omap_stop_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd)
449{
450 unsigned long timeout = jiffies + msecs_to_jiffies(100);
451
452 dev_dbg(omap->dev, "stopping TI EHCI USB Controller\n");
453
454 /* Reset OMAP modules for insmod/rmmod to work */
455 ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG,
456 OMAP_UHH_SYSCONFIG_SOFTRESET);
457 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
458 & (1 << 0))) {
459 cpu_relax();
460
461 if (time_after(jiffies, timeout))
462 dev_dbg(omap->dev, "operation timed out\n");
463 }
464
465 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
466 & (1 << 1))) {
467 cpu_relax();
468
469 if (time_after(jiffies, timeout))
470 dev_dbg(omap->dev, "operation timed out\n");
471 }
472
473 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
474 & (1 << 2))) {
475 cpu_relax();
476
477 if (time_after(jiffies, timeout))
478 dev_dbg(omap->dev, "operation timed out\n");
479 }
480
481 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1));
482
483 while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
484 & (1 << 0))) {
485 cpu_relax();
486
487 if (time_after(jiffies, timeout))
488 dev_dbg(omap->dev, "operation timed out\n");
489 }
490
491 if (omap->usbtll_fck != NULL) {
492 clk_disable(omap->usbtll_fck);
493 clk_put(omap->usbtll_fck);
494 omap->usbtll_fck = NULL;
495 }
496
497 if (omap->usbhost_ick != NULL) {
498 clk_disable(omap->usbhost_ick);
499 clk_put(omap->usbhost_ick);
500 omap->usbhost_ick = NULL;
501 }
502
503 if (omap->usbhost1_48m_fck != NULL) {
504 clk_disable(omap->usbhost1_48m_fck);
505 clk_put(omap->usbhost1_48m_fck);
506 omap->usbhost1_48m_fck = NULL;
507 }
508
509 if (omap->usbhost2_120m_fck != NULL) {
510 clk_disable(omap->usbhost2_120m_fck);
511 clk_put(omap->usbhost2_120m_fck);
512 omap->usbhost2_120m_fck = NULL;
513 }
514
515 if (omap->usbtll_ick != NULL) {
516 clk_disable(omap->usbtll_ick);
517 clk_put(omap->usbtll_ick);
518 omap->usbtll_ick = NULL;
519 }
520
521 if (omap->phy_reset) {
522 if (gpio_is_valid(omap->reset_gpio_port[0]))
523 gpio_free(omap->reset_gpio_port[0]);
524
525 if (gpio_is_valid(omap->reset_gpio_port[1]))
526 gpio_free(omap->reset_gpio_port[1]);
527 }
528
529 dev_dbg(omap->dev, "Clock to USB host has been disabled\n");
530}
531
532/*-------------------------------------------------------------------------*/
533
534static const struct hc_driver ehci_omap_hc_driver;
535
536/* configure so an HC device and id are always provided */
537/* always called with process context; sleeping is OK */
538
539/**
540 * ehci_hcd_omap_probe - initialize TI-based HCDs
541 *
542 * Allocates basic resources for this USB host controller, and
543 * then invokes the start() method for the HCD associated with it
544 * through the hotplug entry's driver_data.
545 */
546static int ehci_hcd_omap_probe(struct platform_device *pdev)
547{
548 struct ehci_hcd_omap_platform_data *pdata = pdev->dev.platform_data;
549 struct ehci_hcd_omap *omap;
550 struct resource *res;
551 struct usb_hcd *hcd;
552
553 int irq = platform_get_irq(pdev, 0);
554 int ret = -ENODEV;
555 int i;
556 char supply[7];
557
558 if (!pdata) {
559 dev_dbg(&pdev->dev, "missing platform_data\n");
560 goto err_pdata;
561 }
562
563 if (usb_disabled())
564 goto err_disabled;
565
566 omap = kzalloc(sizeof(*omap), GFP_KERNEL);
567 if (!omap) {
568 ret = -ENOMEM;
569 goto err_disabled;
570 }
571
572 hcd = usb_create_hcd(&ehci_omap_hc_driver, &pdev->dev,
573 dev_name(&pdev->dev));
574 if (!hcd) {
575 dev_dbg(&pdev->dev, "failed to create hcd with err %d\n", ret);
576 ret = -ENOMEM;
577 goto err_create_hcd;
578 }
579
580 platform_set_drvdata(pdev, omap);
581 omap->dev = &pdev->dev;
582 omap->phy_reset = pdata->phy_reset;
583 omap->reset_gpio_port[0] = pdata->reset_gpio_port[0];
584 omap->reset_gpio_port[1] = pdata->reset_gpio_port[1];
585 omap->reset_gpio_port[2] = pdata->reset_gpio_port[2];
586 omap->port_mode[0] = pdata->port_mode[0];
587 omap->port_mode[1] = pdata->port_mode[1];
588 omap->port_mode[2] = pdata->port_mode[2];
589 omap->ehci = hcd_to_ehci(hcd);
590 omap->ehci->sbrn = 0x20;
591
592 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
593
594 hcd->rsrc_start = res->start;
595 hcd->rsrc_len = resource_size(res);
596
597 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
598 if (!hcd->regs) {
599 dev_err(&pdev->dev, "EHCI ioremap failed\n");
600 ret = -ENOMEM;
601 goto err_ioremap;
602 }
603
604 /* we know this is the memory we want, no need to ioremap again */
605 omap->ehci->caps = hcd->regs;
606 omap->ehci_base = hcd->regs;
607
608 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
609 omap->uhh_base = ioremap(res->start, resource_size(res));
610 if (!omap->uhh_base) {
611 dev_err(&pdev->dev, "UHH ioremap failed\n");
612 ret = -ENOMEM;
613 goto err_uhh_ioremap;
614 }
615
616 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
617 omap->tll_base = ioremap(res->start, resource_size(res));
618 if (!omap->tll_base) {
619 dev_err(&pdev->dev, "TLL ioremap failed\n");
620 ret = -ENOMEM;
621 goto err_tll_ioremap;
622 }
623
624 /* get ehci regulator and enable */
625 for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
626 if (omap->port_mode[i] != EHCI_HCD_OMAP_MODE_PHY) {
627 omap->regulator[i] = NULL;
628 continue;
629 }
630 snprintf(supply, sizeof(supply), "hsusb%d", i);
631 omap->regulator[i] = regulator_get(omap->dev, supply);
632 if (IS_ERR(omap->regulator[i])) {
633 omap->regulator[i] = NULL;
634 dev_dbg(&pdev->dev,
635 "failed to get ehci port%d regulator\n", i);
636 } else {
637 regulator_enable(omap->regulator[i]);
638 }
639 }
640
641 ret = omap_start_ehc(omap, hcd);
642 if (ret) {
643 dev_dbg(&pdev->dev, "failed to start ehci\n");
644 goto err_start;
645 }
646
647 omap->ehci->regs = hcd->regs
648 + HC_LENGTH(readl(&omap->ehci->caps->hc_capbase));
649
650 dbg_hcs_params(omap->ehci, "reset");
651 dbg_hcc_params(omap->ehci, "reset");
652
653 /* cache this readonly data; minimize chip reads */
654 omap->ehci->hcs_params = readl(&omap->ehci->caps->hcs_params);
655
656 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
657 if (ret) {
658 dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
659 goto err_add_hcd;
660 }
661
662 return 0;
663
664err_add_hcd:
665 omap_stop_ehc(omap, hcd);
666
667err_start:
668 for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
669 if (omap->regulator[i]) {
670 regulator_disable(omap->regulator[i]);
671 regulator_put(omap->regulator[i]);
672 }
673 }
674 iounmap(omap->tll_base);
675
676err_tll_ioremap:
677 iounmap(omap->uhh_base);
678
679err_uhh_ioremap:
680 iounmap(hcd->regs);
681
682err_ioremap:
683 usb_put_hcd(hcd);
684
685err_create_hcd:
686 kfree(omap);
687err_disabled:
688err_pdata:
689 return ret;
690}
691
692/* may be called without controller electrically present */
693/* may be called with controller, bus, and devices active */
694
695/**
696 * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs
697 * @pdev: USB Host Controller being removed
698 *
699 * Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking
700 * the HCD's stop() method. It is always called from a thread
701 * context, normally "rmmod", "apmd", or something similar.
702 */
703static int ehci_hcd_omap_remove(struct platform_device *pdev)
704{
705 struct ehci_hcd_omap *omap = platform_get_drvdata(pdev);
706 struct usb_hcd *hcd = ehci_to_hcd(omap->ehci);
707 int i;
708
709 usb_remove_hcd(hcd);
710 omap_stop_ehc(omap, hcd);
711 iounmap(hcd->regs);
712 for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
713 if (omap->regulator[i]) {
714 regulator_disable(omap->regulator[i]);
715 regulator_put(omap->regulator[i]);
716 }
717 }
718 iounmap(omap->tll_base);
719 iounmap(omap->uhh_base);
720 usb_put_hcd(hcd);
721 kfree(omap);
722
723 return 0;
724}
725
726static void ehci_hcd_omap_shutdown(struct platform_device *pdev)
727{
728 struct ehci_hcd_omap *omap = platform_get_drvdata(pdev);
729 struct usb_hcd *hcd = ehci_to_hcd(omap->ehci);
730
731 if (hcd->driver->shutdown)
732 hcd->driver->shutdown(hcd);
733}
734
735static struct platform_driver ehci_hcd_omap_driver = {
736 .probe = ehci_hcd_omap_probe,
737 .remove = ehci_hcd_omap_remove,
738 .shutdown = ehci_hcd_omap_shutdown,
739 /*.suspend = ehci_hcd_omap_suspend, */
740 /*.resume = ehci_hcd_omap_resume, */
741 .driver = {
742 .name = "ehci-omap",
743 }
744};
745
746/*-------------------------------------------------------------------------*/
747
748static const struct hc_driver ehci_omap_hc_driver = {
749 .description = hcd_name,
750 .product_desc = "OMAP-EHCI Host Controller",
751 .hcd_priv_size = sizeof(struct ehci_hcd),
752
753 /*
754 * generic hardware linkage
755 */
756 .irq = ehci_irq,
757 .flags = HCD_MEMORY | HCD_USB2,
758
759 /*
760 * basic lifecycle operations
761 */
762 .reset = ehci_init,
763 .start = ehci_run,
764 .stop = ehci_stop,
765 .shutdown = ehci_shutdown,
766
767 /*
768 * managing i/o requests and associated device resources
769 */
770 .urb_enqueue = ehci_urb_enqueue,
771 .urb_dequeue = ehci_urb_dequeue,
772 .endpoint_disable = ehci_endpoint_disable,
773 .endpoint_reset = ehci_endpoint_reset,
774
775 /*
776 * scheduling support
777 */
778 .get_frame_number = ehci_get_frame,
779
780 /*
781 * root hub support
782 */
783 .hub_status_data = ehci_hub_status_data,
784 .hub_control = ehci_hub_control,
785 .bus_suspend = ehci_bus_suspend,
786 .bus_resume = ehci_bus_resume,
787
788 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
789};
790
791MODULE_ALIAS("platform:omap-ehci");
792MODULE_AUTHOR("Texas Instruments, Inc.");
793MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
794
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-03 00:45:22 -0400