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authorFelipe Balbi <felipe.balbi@nokia.com>2009-10-14 04:44:14 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 14:55:16 -0500
commit54ab2b02ef6a454b4cca969f546d0dd43fec7308 (patch)
treef2fe9420e0da8dc30d350f04c1ab55c0a8e96cd5 /drivers/usb/host/ehci-omap.c
parent2d57a95f09cf71c4c642e5be15f8b700d17ee90c (diff)
USB: host: ehci: introduce omap ehci-hcd driver
this driver has been sitting in linux-omap tree for quite some time. It adds support for omap's ehci controller. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com> Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-omap.c')
-rw-r--r--drivers/usb/host/ehci-omap.c755
1 files changed, 755 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..7ba8df3c6d78
--- /dev/null
+++ b/drivers/usb/host/ehci-omap.c
@@ -0,0 +1,755 @@
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 23rd, 2009):
30 * - add kernel-doc
31 * - enable AUTOIDLE
32 * - move DPLL5 programming to clock fw
33 * - add suspend/resume
34 * - move workarounds to board-files
35 */
36
37#include <linux/platform_device.h>
38#include <linux/clk.h>
39#include <linux/gpio.h>
40#include <mach/usb.h>
41
42/*
43 * OMAP USBHOST Register addresses: VIRTUAL ADDRESSES
44 * Use ehci_omap_readl()/ehci_omap_writel() functions
45 */
46
47/* TLL Register Set */
48#define OMAP_USBTLL_REVISION (0x00)
49#define OMAP_USBTLL_SYSCONFIG (0x10)
50#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
51#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
52#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
53#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
54#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
55
56#define OMAP_USBTLL_SYSSTATUS (0x14)
57#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
58
59#define OMAP_USBTLL_IRQSTATUS (0x18)
60#define OMAP_USBTLL_IRQENABLE (0x1C)
61
62#define OMAP_TLL_SHARED_CONF (0x30)
63#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
64#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
65#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
66#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
67#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
68
69#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
70#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
71#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
72#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
73#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
74#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
75
76#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
77#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
78#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
79#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
80#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
81#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
82#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
83#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
84#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
85
86#define OMAP_TLL_CHANNEL_COUNT 3
87#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 1)
88#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 2)
89#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 4)
90
91/* UHH Register Set */
92#define OMAP_UHH_REVISION (0x00)
93#define OMAP_UHH_SYSCONFIG (0x10)
94#define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12)
95#define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8)
96#define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3)
97#define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2)
98#define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1)
99#define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0)
100
101#define OMAP_UHH_SYSSTATUS (0x14)
102#define OMAP_UHH_HOSTCONFIG (0x40)
103#define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0)
104#define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0)
105#define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11)
106#define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12)
107#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2)
108#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3)
109#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4)
110#define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5)
111#define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8)
112#define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9)
113#define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10)
114
115#define OMAP_UHH_DEBUG_CSR (0x44)
116
117/* EHCI Register Set */
118#define EHCI_INSNREG05_ULPI (0xA4)
119#define EHCI_INSNREG05_ULPI_CONTROL_SHIFT 31
120#define EHCI_INSNREG05_ULPI_PORTSEL_SHIFT 24
121#define EHCI_INSNREG05_ULPI_OPSEL_SHIFT 22
122#define EHCI_INSNREG05_ULPI_REGADD_SHIFT 16
123#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
124#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
125
126/*-------------------------------------------------------------------------*/
127
128static inline void ehci_omap_writel(void __iomem *base, u32 reg, u32 val)
129{
130 __raw_writel(val, base + reg);
131}
132
133static inline u32 ehci_omap_readl(void __iomem *base, u32 reg)
134{
135 return __raw_readl(base + reg);
136}
137
138static inline void ehci_omap_writeb(void __iomem *base, u8 reg, u8 val)
139{
140 __raw_writeb(val, base + reg);
141}
142
143static inline u8 ehci_omap_readb(void __iomem *base, u8 reg)
144{
145 return __raw_readb(base + reg);
146}
147
148/*-------------------------------------------------------------------------*/
149
150struct ehci_hcd_omap {
151 struct ehci_hcd *ehci;
152 struct device *dev;
153
154 struct clk *usbhost_ick;
155 struct clk *usbhost2_120m_fck;
156 struct clk *usbhost1_48m_fck;
157 struct clk *usbtll_fck;
158 struct clk *usbtll_ick;
159
160 /* FIXME the following two workarounds are
161 * board specific not silicon-specific so these
162 * should be moved to board-file instead.
163 *
164 * Maybe someone from TI will know better which
165 * board is affected and needs the workarounds
166 * to be applied
167 */
168
169 /* gpio for resetting phy */
170 int reset_gpio_port[OMAP3_HS_USB_PORTS];
171
172 /* phy reset workaround */
173 int phy_reset;
174
175 /* desired phy_mode: TLL, PHY */
176 enum ehci_hcd_omap_mode port_mode[OMAP3_HS_USB_PORTS];
177
178 void __iomem *uhh_base;
179 void __iomem *tll_base;
180 void __iomem *ehci_base;
181};
182
183/*-------------------------------------------------------------------------*/
184
185static void omap_usb_utmi_init(struct ehci_hcd_omap *omap, u8 tll_channel_mask)
186{
187 unsigned reg;
188 int i;
189
190 /* Program the 3 TLL channels upfront */
191 for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
192 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
193
194 /* Disable AutoIdle, BitStuffing and use SDR Mode */
195 reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
196 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
197 | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
198 ehci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
199 }
200
201 /* Program Common TLL register */
202 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_SHARED_CONF);
203 reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
204 | OMAP_TLL_SHARED_CONF_USB_DIVRATION
205 | OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN);
206 reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
207
208 ehci_omap_writel(omap->tll_base, OMAP_TLL_SHARED_CONF, reg);
209
210 /* Enable channels now */
211 for (i = 0; i < OMAP_TLL_CHANNEL_COUNT; i++) {
212 reg = ehci_omap_readl(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i));
213
214 /* Enable only the reg that is needed */
215 if (!(tll_channel_mask & 1<<i))
216 continue;
217
218 reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
219 ehci_omap_writel(omap->tll_base, OMAP_TLL_CHANNEL_CONF(i), reg);
220
221 ehci_omap_writeb(omap->tll_base,
222 OMAP_TLL_ULPI_SCRATCH_REGISTER(i), 0xbe);
223 dev_dbg(omap->dev, "ULPI_SCRATCH_REG[ch=%d]= 0x%02x\n",
224 i+1, ehci_omap_readb(omap->tll_base,
225 OMAP_TLL_ULPI_SCRATCH_REGISTER(i)));
226 }
227}
228
229/*-------------------------------------------------------------------------*/
230
231/* omap_start_ehc
232 * - Start the TI USBHOST controller
233 */
234static int omap_start_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd)
235{
236 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
237 u8 tll_ch_mask = 0;
238 unsigned reg = 0;
239 int ret = 0;
240
241 dev_dbg(omap->dev, "starting TI EHCI USB Controller\n");
242
243 /* Enable Clocks for USBHOST */
244 omap->usbhost_ick = clk_get(omap->dev, "usbhost_ick");
245 if (IS_ERR(omap->usbhost_ick)) {
246 ret = PTR_ERR(omap->usbhost_ick);
247 goto err_host_ick;
248 }
249 clk_enable(omap->usbhost_ick);
250
251 omap->usbhost2_120m_fck = clk_get(omap->dev, "usbhost_120m_fck");
252 if (IS_ERR(omap->usbhost2_120m_fck)) {
253 ret = PTR_ERR(omap->usbhost2_120m_fck);
254 goto err_host_120m_fck;
255 }
256 clk_enable(omap->usbhost2_120m_fck);
257
258 omap->usbhost1_48m_fck = clk_get(omap->dev, "usbhost_48m_fck");
259 if (IS_ERR(omap->usbhost1_48m_fck)) {
260 ret = PTR_ERR(omap->usbhost1_48m_fck);
261 goto err_host_48m_fck;
262 }
263 clk_enable(omap->usbhost1_48m_fck);
264
265 if (omap->phy_reset) {
266 /* Refer: ISSUE1 */
267 if (gpio_is_valid(omap->reset_gpio_port[0])) {
268 gpio_request(omap->reset_gpio_port[0],
269 "USB1 PHY reset");
270 gpio_direction_output(omap->reset_gpio_port[0], 0);
271 }
272
273 if (gpio_is_valid(omap->reset_gpio_port[1])) {
274 gpio_request(omap->reset_gpio_port[1],
275 "USB2 PHY reset");
276 gpio_direction_output(omap->reset_gpio_port[1], 0);
277 }
278
279 /* Hold the PHY in RESET for enough time till DIR is high */
280 udelay(10);
281 }
282
283 /* Configure TLL for 60Mhz clk for ULPI */
284 omap->usbtll_fck = clk_get(omap->dev, "usbtll_fck");
285 if (IS_ERR(omap->usbtll_fck)) {
286 ret = PTR_ERR(omap->usbtll_fck);
287 goto err_tll_fck;
288 }
289 clk_enable(omap->usbtll_fck);
290
291 omap->usbtll_ick = clk_get(omap->dev, "usbtll_ick");
292 if (IS_ERR(omap->usbtll_ick)) {
293 ret = PTR_ERR(omap->usbtll_ick);
294 goto err_tll_ick;
295 }
296 clk_enable(omap->usbtll_ick);
297
298 /* perform TLL soft reset, and wait until reset is complete */
299 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
300 OMAP_USBTLL_SYSCONFIG_SOFTRESET);
301
302 /* Wait for TLL reset to complete */
303 while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
304 & OMAP_USBTLL_SYSSTATUS_RESETDONE)) {
305 cpu_relax();
306
307 if (time_after(jiffies, timeout)) {
308 dev_dbg(omap->dev, "operation timed out\n");
309 ret = -EINVAL;
310 goto err_sys_status;
311 }
312 }
313
314 dev_dbg(omap->dev, "TLL RESET DONE\n");
315
316 /* (1<<3) = no idle mode only for initial debugging */
317 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG,
318 OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
319 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
320 OMAP_USBTLL_SYSCONFIG_CACTIVITY);
321
322
323 /* Put UHH in NoIdle/NoStandby mode */
324 reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSCONFIG);
325 reg |= (OMAP_UHH_SYSCONFIG_ENAWAKEUP
326 | OMAP_UHH_SYSCONFIG_SIDLEMODE
327 | OMAP_UHH_SYSCONFIG_CACTIVITY
328 | OMAP_UHH_SYSCONFIG_MIDLEMODE);
329 reg &= ~OMAP_UHH_SYSCONFIG_AUTOIDLE;
330
331 ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG, reg);
332
333 reg = ehci_omap_readl(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
334
335 /* setup ULPI bypass and burst configurations */
336 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
337 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
338 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
339 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
340
341 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_UNKNOWN)
342 reg &= ~OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS;
343 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_UNKNOWN)
344 reg &= ~OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS;
345 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_UNKNOWN)
346 reg &= ~OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS;
347
348 /* Bypass the TLL module for PHY mode operation */
349 if (omap_rev() <= OMAP3430_REV_ES2_1) {
350 dev_dbg(omap->dev, "OMAP3 ES version <= ES2.1 \n");
351 if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY) ||
352 (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY) ||
353 (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY))
354 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
355 else
356 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
357 } else {
358 dev_dbg(omap->dev, "OMAP3 ES version > ES2.1\n");
359 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_PHY)
360 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
361 else if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL)
362 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
363
364 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_PHY)
365 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
366 else if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL)
367 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS;
368
369 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_PHY)
370 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
371 else if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)
372 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS;
373
374 }
375 ehci_omap_writel(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
376 dev_dbg(omap->dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
377
378
379 if ((omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL) ||
380 (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL) ||
381 (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)) {
382
383 if (omap->port_mode[0] == EHCI_HCD_OMAP_MODE_TLL)
384 tll_ch_mask |= OMAP_TLL_CHANNEL_1_EN_MASK;
385 if (omap->port_mode[1] == EHCI_HCD_OMAP_MODE_TLL)
386 tll_ch_mask |= OMAP_TLL_CHANNEL_2_EN_MASK;
387 if (omap->port_mode[2] == EHCI_HCD_OMAP_MODE_TLL)
388 tll_ch_mask |= OMAP_TLL_CHANNEL_3_EN_MASK;
389
390 /* Enable UTMI mode for required TLL channels */
391 omap_usb_utmi_init(omap, tll_ch_mask);
392 }
393
394 if (omap->phy_reset) {
395 /* Refer ISSUE1:
396 * Hold the PHY in RESET for enough time till
397 * PHY is settled and ready
398 */
399 udelay(10);
400
401 if (gpio_is_valid(omap->reset_gpio_port[0]))
402 gpio_set_value(omap->reset_gpio_port[0], 1);
403
404 if (gpio_is_valid(omap->reset_gpio_port[1]))
405 gpio_set_value(omap->reset_gpio_port[1], 1);
406 }
407
408 return 0;
409
410err_sys_status:
411 clk_disable(omap->usbtll_ick);
412 clk_put(omap->usbtll_ick);
413
414err_tll_ick:
415 clk_disable(omap->usbtll_fck);
416 clk_put(omap->usbtll_fck);
417
418err_tll_fck:
419 clk_disable(omap->usbhost1_48m_fck);
420 clk_put(omap->usbhost1_48m_fck);
421
422 if (omap->phy_reset) {
423 if (gpio_is_valid(omap->reset_gpio_port[0]))
424 gpio_free(omap->reset_gpio_port[0]);
425
426 if (gpio_is_valid(omap->reset_gpio_port[1]))
427 gpio_free(omap->reset_gpio_port[1]);
428 }
429
430err_host_48m_fck:
431 clk_disable(omap->usbhost2_120m_fck);
432 clk_put(omap->usbhost2_120m_fck);
433
434err_host_120m_fck:
435 clk_disable(omap->usbhost_ick);
436 clk_put(omap->usbhost_ick);
437
438err_host_ick:
439 return ret;
440}
441
442static void omap_stop_ehc(struct ehci_hcd_omap *omap, struct usb_hcd *hcd)
443{
444 unsigned long timeout = jiffies + msecs_to_jiffies(100);
445
446 dev_dbg(omap->dev, "stopping TI EHCI USB Controller\n");
447
448 /* Reset OMAP modules for insmod/rmmod to work */
449 ehci_omap_writel(omap->uhh_base, OMAP_UHH_SYSCONFIG,
450 OMAP_UHH_SYSCONFIG_SOFTRESET);
451 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
452 & (1 << 0))) {
453 cpu_relax();
454
455 if (time_after(jiffies, timeout))
456 dev_dbg(omap->dev, "operation timed out\n");
457 }
458
459 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
460 & (1 << 1))) {
461 cpu_relax();
462
463 if (time_after(jiffies, timeout))
464 dev_dbg(omap->dev, "operation timed out\n");
465 }
466
467 while (!(ehci_omap_readl(omap->uhh_base, OMAP_UHH_SYSSTATUS)
468 & (1 << 2))) {
469 cpu_relax();
470
471 if (time_after(jiffies, timeout))
472 dev_dbg(omap->dev, "operation timed out\n");
473 }
474
475 ehci_omap_writel(omap->tll_base, OMAP_USBTLL_SYSCONFIG, (1 << 1));
476
477 while (!(ehci_omap_readl(omap->tll_base, OMAP_USBTLL_SYSSTATUS)
478 & (1 << 0))) {
479 cpu_relax();
480
481 if (time_after(jiffies, timeout))
482 dev_dbg(omap->dev, "operation timed out\n");
483 }
484
485 if (omap->usbtll_fck != NULL) {
486 clk_disable(omap->usbtll_fck);
487 clk_put(omap->usbtll_fck);
488 omap->usbtll_fck = NULL;
489 }
490
491 if (omap->usbhost_ick != NULL) {
492 clk_disable(omap->usbhost_ick);
493 clk_put(omap->usbhost_ick);
494 omap->usbhost_ick = NULL;
495 }
496
497 if (omap->usbhost1_48m_fck != NULL) {
498 clk_disable(omap->usbhost1_48m_fck);
499 clk_put(omap->usbhost1_48m_fck);
500 omap->usbhost1_48m_fck = NULL;
501 }
502
503 if (omap->usbhost2_120m_fck != NULL) {
504 clk_disable(omap->usbhost2_120m_fck);
505 clk_put(omap->usbhost2_120m_fck);
506 omap->usbhost2_120m_fck = NULL;
507 }
508
509 if (omap->usbtll_ick != NULL) {
510 clk_disable(omap->usbtll_ick);
511 clk_put(omap->usbtll_ick);
512 omap->usbtll_ick = NULL;
513 }
514
515 if (omap->phy_reset) {
516 if (gpio_is_valid(omap->reset_gpio_port[0]))
517 gpio_free(omap->reset_gpio_port[0]);
518
519 if (gpio_is_valid(omap->reset_gpio_port[1]))
520 gpio_free(omap->reset_gpio_port[1]);
521 }
522
523 dev_dbg(omap->dev, "Clock to USB host has been disabled\n");
524}
525
526/*-------------------------------------------------------------------------*/
527
528static const struct hc_driver ehci_omap_hc_driver;
529
530/* configure so an HC device and id are always provided */
531/* always called with process context; sleeping is OK */
532
533/**
534 * ehci_hcd_omap_probe - initialize TI-based HCDs
535 *
536 * Allocates basic resources for this USB host controller, and
537 * then invokes the start() method for the HCD associated with it
538 * through the hotplug entry's driver_data.
539 */
540static int ehci_hcd_omap_probe(struct platform_device *pdev)
541{
542 struct ehci_hcd_omap_platform_data *pdata = pdev->dev.platform_data;
543 struct ehci_hcd_omap *omap;
544 struct resource *res;
545 struct usb_hcd *hcd;
546
547 int irq = platform_get_irq(pdev, 0);
548 int ret = -ENODEV;
549
550 if (!pdata) {
551 dev_dbg(&pdev->dev, "missing platform_data\n");
552 goto err_pdata;
553 }
554
555 if (usb_disabled())
556 goto err_disabled;
557
558 omap = kzalloc(sizeof(*omap), GFP_KERNEL);
559 if (!omap) {
560 ret = -ENOMEM;
561 goto err_create_hcd;
562 }
563
564 hcd = usb_create_hcd(&ehci_omap_hc_driver, &pdev->dev,
565 dev_name(&pdev->dev));
566 if (!hcd) {
567 dev_dbg(&pdev->dev, "failed to create hcd with err %d\n", ret);
568 ret = -ENOMEM;
569 goto err_create_hcd;
570 }
571
572 platform_set_drvdata(pdev, omap);
573 omap->dev = &pdev->dev;
574 omap->phy_reset = pdata->phy_reset;
575 omap->reset_gpio_port[0] = pdata->reset_gpio_port[0];
576 omap->reset_gpio_port[1] = pdata->reset_gpio_port[1];
577 omap->reset_gpio_port[2] = pdata->reset_gpio_port[2];
578 omap->port_mode[0] = pdata->port_mode[0];
579 omap->port_mode[1] = pdata->port_mode[1];
580 omap->port_mode[2] = pdata->port_mode[2];
581 omap->ehci = hcd_to_ehci(hcd);
582 omap->ehci->sbrn = 0x20;
583
584 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
585
586 hcd->rsrc_start = res->start;
587 hcd->rsrc_len = resource_size(res);
588
589 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
590 if (!hcd->regs) {
591 dev_err(&pdev->dev, "EHCI ioremap failed\n");
592 ret = -ENOMEM;
593 goto err_ioremap;
594 }
595
596 /* we know this is the memory we want, no need to ioremap again */
597 omap->ehci->caps = hcd->regs;
598 omap->ehci_base = hcd->regs;
599
600 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
601 omap->uhh_base = ioremap(res->start, resource_size(res));
602 if (!omap->uhh_base) {
603 dev_err(&pdev->dev, "UHH ioremap failed\n");
604 ret = -ENOMEM;
605 goto err_uhh_ioremap;
606 }
607
608 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
609 omap->tll_base = ioremap(res->start, resource_size(res));
610 if (!omap->tll_base) {
611 dev_err(&pdev->dev, "TLL ioremap failed\n");
612 ret = -ENOMEM;
613 goto err_tll_ioremap;
614 }
615
616 ret = omap_start_ehc(omap, hcd);
617 if (ret) {
618 dev_dbg(&pdev->dev, "failed to start ehci\n");
619 goto err_start;
620 }
621
622 omap->ehci->regs = hcd->regs
623 + HC_LENGTH(readl(&omap->ehci->caps->hc_capbase));
624
625 /* cache this readonly data; minimize chip reads */
626 omap->ehci->hcs_params = readl(&omap->ehci->caps->hcs_params);
627
628 /* SET 1 micro-frame Interrupt interval */
629 writel(readl(&omap->ehci->regs->command) | (1 << 16),
630 &omap->ehci->regs->command);
631
632 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
633 if (ret) {
634 dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
635 goto err_add_hcd;
636 }
637
638 return 0;
639
640err_add_hcd:
641 omap_stop_ehc(omap, hcd);
642
643err_start:
644 iounmap(omap->tll_base);
645
646err_tll_ioremap:
647 iounmap(omap->uhh_base);
648
649err_uhh_ioremap:
650 iounmap(hcd->regs);
651
652err_ioremap:
653 usb_put_hcd(hcd);
654
655err_create_hcd:
656err_disabled:
657err_pdata:
658 return ret;
659}
660
661/* may be called without controller electrically present */
662/* may be called with controller, bus, and devices active */
663
664/**
665 * ehci_hcd_omap_remove - shutdown processing for EHCI HCDs
666 * @pdev: USB Host Controller being removed
667 *
668 * Reverses the effect of usb_ehci_hcd_omap_probe(), first invoking
669 * the HCD's stop() method. It is always called from a thread
670 * context, normally "rmmod", "apmd", or something similar.
671 */
672static int ehci_hcd_omap_remove(struct platform_device *pdev)
673{
674 struct ehci_hcd_omap *omap = platform_get_drvdata(pdev);
675 struct usb_hcd *hcd = ehci_to_hcd(omap->ehci);
676
677 usb_remove_hcd(hcd);
678 omap_stop_ehc(omap, hcd);
679 iounmap(hcd->regs);
680 iounmap(omap->tll_base);
681 iounmap(omap->uhh_base);
682 usb_put_hcd(hcd);
683
684 return 0;
685}
686
687static void ehci_hcd_omap_shutdown(struct platform_device *pdev)
688{
689 struct ehci_hcd_omap *omap = platform_get_drvdata(pdev);
690 struct usb_hcd *hcd = ehci_to_hcd(omap->ehci);
691
692 if (hcd->driver->shutdown)
693 hcd->driver->shutdown(hcd);
694}
695
696static struct platform_driver ehci_hcd_omap_driver = {
697 .probe = ehci_hcd_omap_probe,
698 .remove = ehci_hcd_omap_remove,
699 .shutdown = ehci_hcd_omap_shutdown,
700 /*.suspend = ehci_hcd_omap_suspend, */
701 /*.resume = ehci_hcd_omap_resume, */
702 .driver = {
703 .name = "ehci-omap",
704 }
705};
706
707/*-------------------------------------------------------------------------*/
708
709static const struct hc_driver ehci_omap_hc_driver = {
710 .description = hcd_name,
711 .product_desc = "OMAP-EHCI Host Controller",
712 .hcd_priv_size = sizeof(struct ehci_hcd),
713
714 /*
715 * generic hardware linkage
716 */
717 .irq = ehci_irq,
718 .flags = HCD_MEMORY | HCD_USB2,
719
720 /*
721 * basic lifecycle operations
722 */
723 .reset = ehci_init,
724 .start = ehci_run,
725 .stop = ehci_stop,
726 .shutdown = ehci_shutdown,
727
728 /*
729 * managing i/o requests and associated device resources
730 */
731 .urb_enqueue = ehci_urb_enqueue,
732 .urb_dequeue = ehci_urb_dequeue,
733 .endpoint_disable = ehci_endpoint_disable,
734 .endpoint_reset = ehci_endpoint_reset,
735
736 /*
737 * scheduling support
738 */
739 .get_frame_number = ehci_get_frame,
740
741 /*
742 * root hub support
743 */
744 .hub_status_data = ehci_hub_status_data,
745 .hub_control = ehci_hub_control,
746 .bus_suspend = ehci_bus_suspend,
747 .bus_resume = ehci_bus_resume,
748
749 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
750};
751
752MODULE_ALIAS("platform:omap-ehci");
753MODULE_AUTHOR("Texas Instruments, Inc.");
754MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
755
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 09:09:36 -0500