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1/**
2 * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
3 *
4 * Copyright (C) 2011-2013 Texas Instruments Incorporated - http://www.ti.com
5 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
6 * Author: Roger Quadros <rogerq@ti.com>
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 of
10 * the License as published by the Free Software Foundation.
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, see <http://www.gnu.org/licenses/>.
19 */
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/types.h>
23#include <linux/slab.h>
24#include <linux/delay.h>
25#include <linux/clk.h>
26#include <linux/dma-mapping.h>
27#include <linux/gpio.h>
28#include <linux/platform_device.h>
29#include <linux/platform_data/usb-omap.h>
30#include <linux/pm_runtime.h>
31#include <linux/of.h>
32#include <linux/of_platform.h>
33#include <linux/err.h>
34
35#include "omap-usb.h"
36
37#define USBHS_DRIVER_NAME "usbhs_omap"
38#define OMAP_EHCI_DEVICE "ehci-omap"
39#define OMAP_OHCI_DEVICE "ohci-omap3"
40
41/* OMAP USBHOST Register addresses */
42
43/* UHH Register Set */
44#define OMAP_UHH_REVISION (0x00)
45#define OMAP_UHH_SYSCONFIG (0x10)
46#define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12)
47#define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8)
48#define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3)
49#define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2)
50#define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1)
51#define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0)
52
53#define OMAP_UHH_SYSSTATUS (0x14)
54#define OMAP_UHH_HOSTCONFIG (0x40)
55#define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0)
56#define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0)
57#define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11)
58#define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12)
59#define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2)
60#define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3)
61#define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4)
62#define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5)
63#define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8)
64#define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9)
65#define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10)
66#define OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31)
67
68/* OMAP4-specific defines */
69#define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2)
70#define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2)
71#define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4)
72#define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4)
73#define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0)
74
75#define OMAP4_P1_MODE_CLEAR (3 << 16)
76#define OMAP4_P1_MODE_TLL (1 << 16)
77#define OMAP4_P1_MODE_HSIC (3 << 16)
78#define OMAP4_P2_MODE_CLEAR (3 << 18)
79#define OMAP4_P2_MODE_TLL (1 << 18)
80#define OMAP4_P2_MODE_HSIC (3 << 18)
81
82#define OMAP_UHH_DEBUG_CSR (0x44)
83
84/* Values of UHH_REVISION - Note: these are not given in the TRM */
85#define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */
86#define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */
87
88#define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1)
89#define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2)
90
91#define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY)
92#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
93#define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC)
94
95
96struct usbhs_hcd_omap {
97 int nports;
98 struct clk **utmi_clk;
99 struct clk **hsic60m_clk;
100 struct clk **hsic480m_clk;
101
102 struct clk *xclk60mhsp1_ck;
103 struct clk *xclk60mhsp2_ck;
104 struct clk *utmi_p1_gfclk;
105 struct clk *utmi_p2_gfclk;
106 struct clk *init_60m_fclk;
107 struct clk *ehci_logic_fck;
108
109 void __iomem *uhh_base;
110
111 struct usbhs_omap_platform_data *pdata;
112
113 u32 usbhs_rev;
114};
115/*-------------------------------------------------------------------------*/
116
117static const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
118static u64 usbhs_dmamask = DMA_BIT_MASK(32);
119
120/*-------------------------------------------------------------------------*/
121
122static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
123{
124 writel_relaxed(val, base + reg);
125}
126
127static inline u32 usbhs_read(void __iomem *base, u32 reg)
128{
129 return readl_relaxed(base + reg);
130}
131
132/*-------------------------------------------------------------------------*/
133
134/**
135 * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
136 * to the device tree binding portN-mode found in
137 * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
138 */
139static const char * const port_modes[] = {
140 [OMAP_USBHS_PORT_MODE_UNUSED] = "",
141 [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
142 [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
143 [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
144 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
145 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
146 [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
147 [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
148 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
149 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
150 [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
151 [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
152 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
153 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
154};
155
156static struct platform_device *omap_usbhs_alloc_child(const char *name,
157 struct resource *res, int num_resources, void *pdata,
158 size_t pdata_size, struct device *dev)
159{
160 struct platform_device *child;
161 int ret;
162
163 child = platform_device_alloc(name, 0);
164
165 if (!child) {
166 dev_err(dev, "platform_device_alloc %s failed\n", name);
167 goto err_end;
168 }
169
170 ret = platform_device_add_resources(child, res, num_resources);
171 if (ret) {
172 dev_err(dev, "platform_device_add_resources failed\n");
173 goto err_alloc;
174 }
175
176 ret = platform_device_add_data(child, pdata, pdata_size);
177 if (ret) {
178 dev_err(dev, "platform_device_add_data failed\n");
179 goto err_alloc;
180 }
181
182 child->dev.dma_mask = &usbhs_dmamask;
183 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32));
184 child->dev.parent = dev;
185
186 ret = platform_device_add(child);
187 if (ret) {
188 dev_err(dev, "platform_device_add failed\n");
189 goto err_alloc;
190 }
191
192 return child;
193
194err_alloc:
195 platform_device_put(child);
196
197err_end:
198 return NULL;
199}
200
201static int omap_usbhs_alloc_children(struct platform_device *pdev)
202{
203 struct device *dev = &pdev->dev;
204 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
205 struct platform_device *ehci;
206 struct platform_device *ohci;
207 struct resource *res;
208 struct resource resources[2];
209 int ret;
210
211 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci");
212 if (!res) {
213 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n");
214 ret = -ENODEV;
215 goto err_end;
216 }
217 resources[0] = *res;
218
219 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq");
220 if (!res) {
221 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n");
222 ret = -ENODEV;
223 goto err_end;
224 }
225 resources[1] = *res;
226
227 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata,
228 sizeof(*pdata), dev);
229
230 if (!ehci) {
231 dev_err(dev, "omap_usbhs_alloc_child failed\n");
232 ret = -ENOMEM;
233 goto err_end;
234 }
235
236 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci");
237 if (!res) {
238 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n");
239 ret = -ENODEV;
240 goto err_ehci;
241 }
242 resources[0] = *res;
243
244 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq");
245 if (!res) {
246 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n");
247 ret = -ENODEV;
248 goto err_ehci;
249 }
250 resources[1] = *res;
251
252 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata,
253 sizeof(*pdata), dev);
254 if (!ohci) {
255 dev_err(dev, "omap_usbhs_alloc_child failed\n");
256 ret = -ENOMEM;
257 goto err_ehci;
258 }
259
260 return 0;
261
262err_ehci:
263 platform_device_unregister(ehci);
264
265err_end:
266 return ret;
267}
268
269static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
270{
271 switch (pmode) {
272 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
273 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
274 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
275 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
276 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
277 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
278 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
279 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
280 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
281 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
282 return true;
283
284 default:
285 return false;
286 }
287}
288
289static int usbhs_runtime_resume(struct device *dev)
290{
291 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
292 struct usbhs_omap_platform_data *pdata = omap->pdata;
293 int i, r;
294
295 dev_dbg(dev, "usbhs_runtime_resume\n");
296
297 omap_tll_enable(pdata);
298
299 if (!IS_ERR(omap->ehci_logic_fck))
300 clk_prepare_enable(omap->ehci_logic_fck);
301
302 for (i = 0; i < omap->nports; i++) {
303 switch (pdata->port_mode[i]) {
304 case OMAP_EHCI_PORT_MODE_HSIC:
305 if (!IS_ERR(omap->hsic60m_clk[i])) {
306 r = clk_prepare_enable(omap->hsic60m_clk[i]);
307 if (r) {
308 dev_err(dev,
309 "Can't enable port %d hsic60m clk:%d\n",
310 i, r);
311 }
312 }
313
314 if (!IS_ERR(omap->hsic480m_clk[i])) {
315 r = clk_prepare_enable(omap->hsic480m_clk[i]);
316 if (r) {
317 dev_err(dev,
318 "Can't enable port %d hsic480m clk:%d\n",
319 i, r);
320 }
321 }
322 /* Fall through as HSIC mode needs utmi_clk */
323
324 case OMAP_EHCI_PORT_MODE_TLL:
325 if (!IS_ERR(omap->utmi_clk[i])) {
326 r = clk_prepare_enable(omap->utmi_clk[i]);
327 if (r) {
328 dev_err(dev,
329 "Can't enable port %d clk : %d\n",
330 i, r);
331 }
332 }
333 break;
334 default:
335 break;
336 }
337 }
338
339 return 0;
340}
341
342static int usbhs_runtime_suspend(struct device *dev)
343{
344 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
345 struct usbhs_omap_platform_data *pdata = omap->pdata;
346 int i;
347
348 dev_dbg(dev, "usbhs_runtime_suspend\n");
349
350 for (i = 0; i < omap->nports; i++) {
351 switch (pdata->port_mode[i]) {
352 case OMAP_EHCI_PORT_MODE_HSIC:
353 if (!IS_ERR(omap->hsic60m_clk[i]))
354 clk_disable_unprepare(omap->hsic60m_clk[i]);
355
356 if (!IS_ERR(omap->hsic480m_clk[i]))
357 clk_disable_unprepare(omap->hsic480m_clk[i]);
358 /* Fall through as utmi_clks were used in HSIC mode */
359
360 case OMAP_EHCI_PORT_MODE_TLL:
361 if (!IS_ERR(omap->utmi_clk[i]))
362 clk_disable_unprepare(omap->utmi_clk[i]);
363 break;
364 default:
365 break;
366 }
367 }
368
369 if (!IS_ERR(omap->ehci_logic_fck))
370 clk_disable_unprepare(omap->ehci_logic_fck);
371
372 omap_tll_disable(pdata);
373
374 return 0;
375}
376
377static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
378 unsigned reg)
379{
380 struct usbhs_omap_platform_data *pdata = omap->pdata;
381 int i;
382
383 for (i = 0; i < omap->nports; i++) {
384 switch (pdata->port_mode[i]) {
385 case OMAP_USBHS_PORT_MODE_UNUSED:
386 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i);
387 break;
388 case OMAP_EHCI_PORT_MODE_PHY:
389 if (pdata->single_ulpi_bypass)
390 break;
391
392 if (i == 0)
393 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
394 else
395 reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
396 << (i-1));
397 break;
398 default:
399 if (pdata->single_ulpi_bypass)
400 break;
401
402 if (i == 0)
403 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
404 else
405 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
406 << (i-1);
407 break;
408 }
409 }
410
411 if (pdata->single_ulpi_bypass) {
412 /* bypass ULPI only if none of the ports use PHY mode */
413 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
414
415 for (i = 0; i < omap->nports; i++) {
416 if (is_ehci_phy_mode(pdata->port_mode[i])) {
417 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
418 break;
419 }
420 }
421 }
422
423 return reg;
424}
425
426static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
427 unsigned reg)
428{
429 struct usbhs_omap_platform_data *pdata = omap->pdata;
430 int i;
431
432 for (i = 0; i < omap->nports; i++) {
433 /* Clear port mode fields for PHY mode */
434 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i);
435
436 if (is_ehci_tll_mode(pdata->port_mode[i]) ||
437 (is_ohci_port(pdata->port_mode[i])))
438 reg |= OMAP4_P1_MODE_TLL << 2 * i;
439 else if (is_ehci_hsic_mode(pdata->port_mode[i]))
440 reg |= OMAP4_P1_MODE_HSIC << 2 * i;
441 }
442
443 return reg;
444}
445
446static void omap_usbhs_init(struct device *dev)
447{
448 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
449 unsigned reg;
450
451 dev_dbg(dev, "starting TI HSUSB Controller\n");
452
453 pm_runtime_get_sync(dev);
454
455 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
456 /* setup ULPI bypass and burst configurations */
457 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
458 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
459 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
460 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK;
461 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
462
463 switch (omap->usbhs_rev) {
464 case OMAP_USBHS_REV1:
465 reg = omap_usbhs_rev1_hostconfig(omap, reg);
466 break;
467
468 case OMAP_USBHS_REV2:
469 reg = omap_usbhs_rev2_hostconfig(omap, reg);
470 break;
471
472 default: /* newer revisions */
473 reg = omap_usbhs_rev2_hostconfig(omap, reg);
474 break;
475 }
476
477 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
478 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
479
480 pm_runtime_put_sync(dev);
481}
482
483static int usbhs_omap_get_dt_pdata(struct device *dev,
484 struct usbhs_omap_platform_data *pdata)
485{
486 int ret, i;
487 struct device_node *node = dev->of_node;
488
489 ret = of_property_read_u32(node, "num-ports", &pdata->nports);
490 if (ret)
491 pdata->nports = 0;
492
493 if (pdata->nports > OMAP3_HS_USB_PORTS) {
494 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
495 pdata->nports, OMAP3_HS_USB_PORTS);
496 return -ENODEV;
497 }
498
499 /* get port modes */
500 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
501 char prop[11];
502 const char *mode;
503
504 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
505
506 snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
507 ret = of_property_read_string(node, prop, &mode);
508 if (ret < 0)
509 continue;
510
511 /* get 'enum usbhs_omap_port_mode' from port mode string */
512 ret = match_string(port_modes, ARRAY_SIZE(port_modes), mode);
513 if (ret < 0) {
514 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
515 i, mode);
516 return -ENODEV;
517 }
518
519 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
520 pdata->port_mode[i] = ret;
521 }
522
523 /* get flags */
524 pdata->single_ulpi_bypass = of_property_read_bool(node,
525 "single-ulpi-bypass");
526
527 return 0;
528}
529
530static const struct of_device_id usbhs_child_match_table[] = {
531 { .compatible = "ti,ehci-omap", },
532 { .compatible = "ti,ohci-omap3", },
533 { }
534};
535
536/**
537 * usbhs_omap_probe - initialize TI-based HCDs
538 *
539 * Allocates basic resources for this USB host controller.
540 */
541static int usbhs_omap_probe(struct platform_device *pdev)
542{
543 struct device *dev = &pdev->dev;
544 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
545 struct usbhs_hcd_omap *omap;
546 struct resource *res;
547 int ret = 0;
548 int i;
549 bool need_logic_fck;
550
551 if (dev->of_node) {
552 /* For DT boot we populate platform data from OF node */
553 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
554 if (!pdata)
555 return -ENOMEM;
556
557 ret = usbhs_omap_get_dt_pdata(dev, pdata);
558 if (ret)
559 return ret;
560
561 dev->platform_data = pdata;
562 }
563
564 if (!pdata) {
565 dev_err(dev, "Missing platform data\n");
566 return -ENODEV;
567 }
568
569 if (pdata->nports > OMAP3_HS_USB_PORTS) {
570 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
571 pdata->nports, OMAP3_HS_USB_PORTS);
572 return -ENODEV;
573 }
574
575 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
576 if (!omap) {
577 dev_err(dev, "Memory allocation failed\n");
578 return -ENOMEM;
579 }
580
581 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
582 omap->uhh_base = devm_ioremap_resource(dev, res);
583 if (IS_ERR(omap->uhh_base))
584 return PTR_ERR(omap->uhh_base);
585
586 omap->pdata = pdata;
587
588 /* Initialize the TLL subsystem */
589 omap_tll_init(pdata);
590
591 pm_runtime_enable(dev);
592
593 platform_set_drvdata(pdev, omap);
594 pm_runtime_get_sync(dev);
595
596 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
597
598 /* we need to call runtime suspend before we update omap->nports
599 * to prevent unbalanced clk_disable()
600 */
601 pm_runtime_put_sync(dev);
602
603 /*
604 * If platform data contains nports then use that
605 * else make out number of ports from USBHS revision
606 */
607 if (pdata->nports) {
608 omap->nports = pdata->nports;
609 } else {
610 switch (omap->usbhs_rev) {
611 case OMAP_USBHS_REV1:
612 omap->nports = 3;
613 break;
614 case OMAP_USBHS_REV2:
615 omap->nports = 2;
616 break;
617 default:
618 omap->nports = OMAP3_HS_USB_PORTS;
619 dev_dbg(dev,
620 "USB HOST Rev:0x%x not recognized, assuming %d ports\n",
621 omap->usbhs_rev, omap->nports);
622 break;
623 }
624 pdata->nports = omap->nports;
625 }
626
627 i = sizeof(struct clk *) * omap->nports;
628 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
629 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
630 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
631
632 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
633 dev_err(dev, "Memory allocation failed\n");
634 ret = -ENOMEM;
635 goto err_mem;
636 }
637
638 /* Set all clocks as invalid to begin with */
639 omap->ehci_logic_fck = ERR_PTR(-ENODEV);
640 omap->init_60m_fclk = ERR_PTR(-ENODEV);
641 omap->utmi_p1_gfclk = ERR_PTR(-ENODEV);
642 omap->utmi_p2_gfclk = ERR_PTR(-ENODEV);
643 omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV);
644 omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV);
645
646 for (i = 0; i < omap->nports; i++) {
647 omap->utmi_clk[i] = ERR_PTR(-ENODEV);
648 omap->hsic480m_clk[i] = ERR_PTR(-ENODEV);
649 omap->hsic60m_clk[i] = ERR_PTR(-ENODEV);
650 }
651
652 /* for OMAP3 i.e. USBHS REV1 */
653 if (omap->usbhs_rev == OMAP_USBHS_REV1) {
654 need_logic_fck = false;
655 for (i = 0; i < omap->nports; i++) {
656 if (is_ehci_phy_mode(pdata->port_mode[i]) ||
657 is_ehci_tll_mode(pdata->port_mode[i]) ||
658 is_ehci_hsic_mode(pdata->port_mode[i]))
659
660 need_logic_fck |= true;
661 }
662
663 if (need_logic_fck) {
664 omap->ehci_logic_fck = devm_clk_get(dev,
665 "usbhost_120m_fck");
666 if (IS_ERR(omap->ehci_logic_fck)) {
667 ret = PTR_ERR(omap->ehci_logic_fck);
668 dev_err(dev, "usbhost_120m_fck failed:%d\n",
669 ret);
670 goto err_mem;
671 }
672 }
673 goto initialize;
674 }
675
676 /* for OMAP4+ i.e. USBHS REV2+ */
677 omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk");
678 if (IS_ERR(omap->utmi_p1_gfclk)) {
679 ret = PTR_ERR(omap->utmi_p1_gfclk);
680 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
681 goto err_mem;
682 }
683
684 omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk");
685 if (IS_ERR(omap->utmi_p2_gfclk)) {
686 ret = PTR_ERR(omap->utmi_p2_gfclk);
687 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
688 goto err_mem;
689 }
690
691 omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1");
692 if (IS_ERR(omap->xclk60mhsp1_ck)) {
693 ret = PTR_ERR(omap->xclk60mhsp1_ck);
694 dev_err(dev, "refclk_60m_ext_p1 failed error:%d\n", ret);
695 goto err_mem;
696 }
697
698 omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2");
699 if (IS_ERR(omap->xclk60mhsp2_ck)) {
700 ret = PTR_ERR(omap->xclk60mhsp2_ck);
701 dev_err(dev, "refclk_60m_ext_p2 failed error:%d\n", ret);
702 goto err_mem;
703 }
704
705 omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int");
706 if (IS_ERR(omap->init_60m_fclk)) {
707 ret = PTR_ERR(omap->init_60m_fclk);
708 dev_err(dev, "refclk_60m_int failed error:%d\n", ret);
709 goto err_mem;
710 }
711
712 for (i = 0; i < omap->nports; i++) {
713 char clkname[30];
714
715 /* clock names are indexed from 1*/
716 snprintf(clkname, sizeof(clkname),
717 "usb_host_hs_utmi_p%d_clk", i + 1);
718
719 /* If a clock is not found we won't bail out as not all
720 * platforms have all clocks and we can function without
721 * them
722 */
723 omap->utmi_clk[i] = devm_clk_get(dev, clkname);
724 if (IS_ERR(omap->utmi_clk[i])) {
725 ret = PTR_ERR(omap->utmi_clk[i]);
726 dev_err(dev, "Failed to get clock : %s : %d\n",
727 clkname, ret);
728 goto err_mem;
729 }
730
731 snprintf(clkname, sizeof(clkname),
732 "usb_host_hs_hsic480m_p%d_clk", i + 1);
733 omap->hsic480m_clk[i] = devm_clk_get(dev, clkname);
734 if (IS_ERR(omap->hsic480m_clk[i])) {
735 ret = PTR_ERR(omap->hsic480m_clk[i]);
736 dev_err(dev, "Failed to get clock : %s : %d\n",
737 clkname, ret);
738 goto err_mem;
739 }
740
741 snprintf(clkname, sizeof(clkname),
742 "usb_host_hs_hsic60m_p%d_clk", i + 1);
743 omap->hsic60m_clk[i] = devm_clk_get(dev, clkname);
744 if (IS_ERR(omap->hsic60m_clk[i])) {
745 ret = PTR_ERR(omap->hsic60m_clk[i]);
746 dev_err(dev, "Failed to get clock : %s : %d\n",
747 clkname, ret);
748 goto err_mem;
749 }
750 }
751
752 if (is_ehci_phy_mode(pdata->port_mode[0])) {
753 ret = clk_set_parent(omap->utmi_p1_gfclk,
754 omap->xclk60mhsp1_ck);
755 if (ret != 0) {
756 dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n",
757 ret);
758 goto err_mem;
759 }
760 } else if (is_ehci_tll_mode(pdata->port_mode[0])) {
761 ret = clk_set_parent(omap->utmi_p1_gfclk,
762 omap->init_60m_fclk);
763 if (ret != 0) {
764 dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n",
765 ret);
766 goto err_mem;
767 }
768 }
769
770 if (is_ehci_phy_mode(pdata->port_mode[1])) {
771 ret = clk_set_parent(omap->utmi_p2_gfclk,
772 omap->xclk60mhsp2_ck);
773 if (ret != 0) {
774 dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n",
775 ret);
776 goto err_mem;
777 }
778 } else if (is_ehci_tll_mode(pdata->port_mode[1])) {
779 ret = clk_set_parent(omap->utmi_p2_gfclk,
780 omap->init_60m_fclk);
781 if (ret != 0) {
782 dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n",
783 ret);
784 goto err_mem;
785 }
786 }
787
788initialize:
789 omap_usbhs_init(dev);
790
791 if (dev->of_node) {
792 ret = of_platform_populate(dev->of_node,
793 usbhs_child_match_table, NULL, dev);
794
795 if (ret) {
796 dev_err(dev, "Failed to create DT children: %d\n", ret);
797 goto err_mem;
798 }
799
800 } else {
801 ret = omap_usbhs_alloc_children(pdev);
802 if (ret) {
803 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
804 ret);
805 goto err_mem;
806 }
807 }
808
809 return 0;
810
811err_mem:
812 pm_runtime_disable(dev);
813
814 return ret;
815}
816
817static int usbhs_omap_remove_child(struct device *dev, void *data)
818{
819 dev_info(dev, "unregistering\n");
820 platform_device_unregister(to_platform_device(dev));
821 return 0;
822}
823
824/**
825 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
826 * @pdev: USB Host Controller being removed
827 *
828 * Reverses the effect of usbhs_omap_probe().
829 */
830static int usbhs_omap_remove(struct platform_device *pdev)
831{
832 pm_runtime_disable(&pdev->dev);
833
834 /* remove children */
835 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
836 return 0;
837}
838
839static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
840 .runtime_suspend = usbhs_runtime_suspend,
841 .runtime_resume = usbhs_runtime_resume,
842};
843
844static const struct of_device_id usbhs_omap_dt_ids[] = {
845 { .compatible = "ti,usbhs-host" },
846 { }
847};
848
849MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
850
851
852static struct platform_driver usbhs_omap_driver = {
853 .driver = {
854 .name = (char *)usbhs_driver_name,
855 .pm = &usbhsomap_dev_pm_ops,
856 .of_match_table = usbhs_omap_dt_ids,
857 },
858 .probe = usbhs_omap_probe,
859 .remove = usbhs_omap_remove,
860};
861
862MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
863MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
864MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
865MODULE_LICENSE("GPL v2");
866MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
867
868static int omap_usbhs_drvinit(void)
869{
870 return platform_driver_register(&usbhs_omap_driver);
871}
872
873/*
874 * init before ehci and ohci drivers;
875 * The usbhs core driver should be initialized much before
876 * the omap ehci and ohci probe functions are called.
877 * This usbhs core driver should be initialized after
878 * usb tll driver
879 */
880fs_initcall_sync(omap_usbhs_drvinit);
881
882static void omap_usbhs_drvexit(void)
883{
884 platform_driver_unregister(&usbhs_omap_driver);
885}
886module_exit(omap_usbhs_drvexit);
887

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