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staging: comedi: usbduxsigma: remove AI scan_begin_src == TRIG_FOLLOW
[linux-2.6/btrfs-unstable.git] / drivers / mfd / omap-usb-host.c
blob1d924d1533c02756124dffe1262e4333ed9b6b5f
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
96 struct 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
117 static const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
118 static u64 usbhs_dmamask = DMA_BIT_MASK(32);
119
120 /*-------------------------------------------------------------------------*/
121
122 static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
123 {
124 writel_relaxed(val, base + reg);
125 }
126
127 static 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 */
139 static 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
156 /**
157 * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
158 * from the port mode string.
159 * @mode: The port mode string, usually obtained from device tree.
160 *
161 * The function returns the 'enum usbhs_omap_port_mode' that matches the
162 * provided port mode string as per the port_modes table.
163 * If no match is found it returns -ENODEV
164 */
165 static const int omap_usbhs_get_dt_port_mode(const char *mode)
166 {
167 int i;
168
169 for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
170 if (!strcmp(mode, port_modes[i]))
171 return i;
172 }
173
174 return -ENODEV;
175 }
176
177 static struct platform_device *omap_usbhs_alloc_child(const char *name,
178 struct resource *res, int num_resources, void *pdata,
179 size_t pdata_size, struct device *dev)
180 {
181 struct platform_device *child;
182 int ret;
183
184 child = platform_device_alloc(name, 0);
185
186 if (!child) {
187 dev_err(dev, "platform_device_alloc %s failed\n", name);
188 goto err_end;
189 }
190
191 ret = platform_device_add_resources(child, res, num_resources);
192 if (ret) {
193 dev_err(dev, "platform_device_add_resources failed\n");
194 goto err_alloc;
195 }
196
197 ret = platform_device_add_data(child, pdata, pdata_size);
198 if (ret) {
199 dev_err(dev, "platform_device_add_data failed\n");
200 goto err_alloc;
201 }
202
203 child->dev.dma_mask = &usbhs_dmamask;
204 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32));
205 child->dev.parent = dev;
206
207 ret = platform_device_add(child);
208 if (ret) {
209 dev_err(dev, "platform_device_add failed\n");
210 goto err_alloc;
211 }
212
213 return child;
214
215 err_alloc:
216 platform_device_put(child);
217
218 err_end:
219 return NULL;
220 }
221
222 static int omap_usbhs_alloc_children(struct platform_device *pdev)
223 {
224 struct device *dev = &pdev->dev;
225 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
226 struct platform_device *ehci;
227 struct platform_device *ohci;
228 struct resource *res;
229 struct resource resources[2];
230 int ret;
231
232 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci");
233 if (!res) {
234 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n");
235 ret = -ENODEV;
236 goto err_end;
237 }
238 resources[0] = *res;
239
240 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq");
241 if (!res) {
242 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n");
243 ret = -ENODEV;
244 goto err_end;
245 }
246 resources[1] = *res;
247
248 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata,
249 sizeof(*pdata), dev);
250
251 if (!ehci) {
252 dev_err(dev, "omap_usbhs_alloc_child failed\n");
253 ret = -ENOMEM;
254 goto err_end;
255 }
256
257 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci");
258 if (!res) {
259 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n");
260 ret = -ENODEV;
261 goto err_ehci;
262 }
263 resources[0] = *res;
264
265 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq");
266 if (!res) {
267 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n");
268 ret = -ENODEV;
269 goto err_ehci;
270 }
271 resources[1] = *res;
272
273 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata,
274 sizeof(*pdata), dev);
275 if (!ohci) {
276 dev_err(dev, "omap_usbhs_alloc_child failed\n");
277 ret = -ENOMEM;
278 goto err_ehci;
279 }
280
281 return 0;
282
283 err_ehci:
284 platform_device_unregister(ehci);
285
286 err_end:
287 return ret;
288 }
289
290 static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
291 {
292 switch (pmode) {
293 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
294 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
295 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
296 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
297 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
298 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
299 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
300 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
301 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
302 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
303 return true;
304
305 default:
306 return false;
307 }
308 }
309
310 static int usbhs_runtime_resume(struct device *dev)
311 {
312 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
313 struct usbhs_omap_platform_data *pdata = omap->pdata;
314 int i, r;
315
316 dev_dbg(dev, "usbhs_runtime_resume\n");
317
318 omap_tll_enable(pdata);
319
320 if (!IS_ERR(omap->ehci_logic_fck))
321 clk_prepare_enable(omap->ehci_logic_fck);
322
323 for (i = 0; i < omap->nports; i++) {
324 switch (pdata->port_mode[i]) {
325 case OMAP_EHCI_PORT_MODE_HSIC:
326 if (!IS_ERR(omap->hsic60m_clk[i])) {
327 r = clk_prepare_enable(omap->hsic60m_clk[i]);
328 if (r) {
329 dev_err(dev,
330 "Can't enable port %d hsic60m clk:%d\n",
331 i, r);
332 }
333 }
334
335 if (!IS_ERR(omap->hsic480m_clk[i])) {
336 r = clk_prepare_enable(omap->hsic480m_clk[i]);
337 if (r) {
338 dev_err(dev,
339 "Can't enable port %d hsic480m clk:%d\n",
340 i, r);
341 }
342 }
343 /* Fall through as HSIC mode needs utmi_clk */
344
345 case OMAP_EHCI_PORT_MODE_TLL:
346 if (!IS_ERR(omap->utmi_clk[i])) {
347 r = clk_prepare_enable(omap->utmi_clk[i]);
348 if (r) {
349 dev_err(dev,
350 "Can't enable port %d clk : %d\n",
351 i, r);
352 }
353 }
354 break;
355 default:
356 break;
357 }
358 }
359
360 return 0;
361 }
362
363 static int usbhs_runtime_suspend(struct device *dev)
364 {
365 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
366 struct usbhs_omap_platform_data *pdata = omap->pdata;
367 int i;
368
369 dev_dbg(dev, "usbhs_runtime_suspend\n");
370
371 for (i = 0; i < omap->nports; i++) {
372 switch (pdata->port_mode[i]) {
373 case OMAP_EHCI_PORT_MODE_HSIC:
374 if (!IS_ERR(omap->hsic60m_clk[i]))
375 clk_disable_unprepare(omap->hsic60m_clk[i]);
376
377 if (!IS_ERR(omap->hsic480m_clk[i]))
378 clk_disable_unprepare(omap->hsic480m_clk[i]);
379 /* Fall through as utmi_clks were used in HSIC mode */
380
381 case OMAP_EHCI_PORT_MODE_TLL:
382 if (!IS_ERR(omap->utmi_clk[i]))
383 clk_disable_unprepare(omap->utmi_clk[i]);
384 break;
385 default:
386 break;
387 }
388 }
389
390 if (!IS_ERR(omap->ehci_logic_fck))
391 clk_disable_unprepare(omap->ehci_logic_fck);
392
393 omap_tll_disable(pdata);
394
395 return 0;
396 }
397
398 static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
399 unsigned reg)
400 {
401 struct usbhs_omap_platform_data *pdata = omap->pdata;
402 int i;
403
404 for (i = 0; i < omap->nports; i++) {
405 switch (pdata->port_mode[i]) {
406 case OMAP_USBHS_PORT_MODE_UNUSED:
407 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i);
408 break;
409 case OMAP_EHCI_PORT_MODE_PHY:
410 if (pdata->single_ulpi_bypass)
411 break;
412
413 if (i == 0)
414 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
415 else
416 reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
417 << (i-1));
418 break;
419 default:
420 if (pdata->single_ulpi_bypass)
421 break;
422
423 if (i == 0)
424 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
425 else
426 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
427 << (i-1);
428 break;
429 }
430 }
431
432 if (pdata->single_ulpi_bypass) {
433 /* bypass ULPI only if none of the ports use PHY mode */
434 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
435
436 for (i = 0; i < omap->nports; i++) {
437 if (is_ehci_phy_mode(pdata->port_mode[i])) {
438 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
439 break;
440 }
441 }
442 }
443
444 return reg;
445 }
446
447 static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
448 unsigned reg)
449 {
450 struct usbhs_omap_platform_data *pdata = omap->pdata;
451 int i;
452
453 for (i = 0; i < omap->nports; i++) {
454 /* Clear port mode fields for PHY mode */
455 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i);
456
457 if (is_ehci_tll_mode(pdata->port_mode[i]) ||
458 (is_ohci_port(pdata->port_mode[i])))
459 reg |= OMAP4_P1_MODE_TLL << 2 * i;
460 else if (is_ehci_hsic_mode(pdata->port_mode[i]))
461 reg |= OMAP4_P1_MODE_HSIC << 2 * i;
462 }
463
464 return reg;
465 }
466
467 static void omap_usbhs_init(struct device *dev)
468 {
469 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
470 unsigned reg;
471
472 dev_dbg(dev, "starting TI HSUSB Controller\n");
473
474 pm_runtime_get_sync(dev);
475
476 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
477 /* setup ULPI bypass and burst configurations */
478 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
479 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
480 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
481 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK;
482 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
483
484 switch (omap->usbhs_rev) {
485 case OMAP_USBHS_REV1:
486 reg = omap_usbhs_rev1_hostconfig(omap, reg);
487 break;
488
489 case OMAP_USBHS_REV2:
490 reg = omap_usbhs_rev2_hostconfig(omap, reg);
491 break;
492
493 default: /* newer revisions */
494 reg = omap_usbhs_rev2_hostconfig(omap, reg);
495 break;
496 }
497
498 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
499 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
500
501 pm_runtime_put_sync(dev);
502 }
503
504 static int usbhs_omap_get_dt_pdata(struct device *dev,
505 struct usbhs_omap_platform_data *pdata)
506 {
507 int ret, i;
508 struct device_node *node = dev->of_node;
509
510 ret = of_property_read_u32(node, "num-ports", &pdata->nports);
511 if (ret)
512 pdata->nports = 0;
513
514 if (pdata->nports > OMAP3_HS_USB_PORTS) {
515 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
516 pdata->nports, OMAP3_HS_USB_PORTS);
517 return -ENODEV;
518 }
519
520 /* get port modes */
521 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
522 char prop[11];
523 const char *mode;
524
525 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
526
527 snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
528 ret = of_property_read_string(node, prop, &mode);
529 if (ret < 0)
530 continue;
531
532 ret = omap_usbhs_get_dt_port_mode(mode);
533 if (ret < 0) {
534 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
535 i, mode);
536 return -ENODEV;
537 }
538
539 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
540 pdata->port_mode[i] = ret;
541 }
542
543 /* get flags */
544 pdata->single_ulpi_bypass = of_property_read_bool(node,
545 "single-ulpi-bypass");
546
547 return 0;
548 }
549
550 static const struct of_device_id usbhs_child_match_table[] = {
551 { .compatible = "ti,omap-ehci", },
552 { .compatible = "ti,omap-ohci", },
553 { }
554 };
555
556 /**
557 * usbhs_omap_probe - initialize TI-based HCDs
558 *
559 * Allocates basic resources for this USB host controller.
560 */
561 static int usbhs_omap_probe(struct platform_device *pdev)
562 {
563 struct device *dev = &pdev->dev;
564 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
565 struct usbhs_hcd_omap *omap;
566 struct resource *res;
567 int ret = 0;
568 int i;
569 bool need_logic_fck;
570
571 if (dev->of_node) {
572 /* For DT boot we populate platform data from OF node */
573 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
574 if (!pdata)
575 return -ENOMEM;
576
577 ret = usbhs_omap_get_dt_pdata(dev, pdata);
578 if (ret)
579 return ret;
580
581 dev->platform_data = pdata;
582 }
583
584 if (!pdata) {
585 dev_err(dev, "Missing platform data\n");
586 return -ENODEV;
587 }
588
589 if (pdata->nports > OMAP3_HS_USB_PORTS) {
590 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
591 pdata->nports, OMAP3_HS_USB_PORTS);
592 return -ENODEV;
593 }
594
595 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
596 if (!omap) {
597 dev_err(dev, "Memory allocation failed\n");
598 return -ENOMEM;
599 }
600
601 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
602 omap->uhh_base = devm_ioremap_resource(dev, res);
603 if (IS_ERR(omap->uhh_base))
604 return PTR_ERR(omap->uhh_base);
605
606 omap->pdata = pdata;
607
608 /* Initialize the TLL subsystem */
609 omap_tll_init(pdata);
610
611 pm_runtime_enable(dev);
612
613 platform_set_drvdata(pdev, omap);
614 pm_runtime_get_sync(dev);
615
616 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
617
618 /* we need to call runtime suspend before we update omap->nports
619 * to prevent unbalanced clk_disable()
620 */
621 pm_runtime_put_sync(dev);
622
623 /*
624 * If platform data contains nports then use that
625 * else make out number of ports from USBHS revision
626 */
627 if (pdata->nports) {
628 omap->nports = pdata->nports;
629 } else {
630 switch (omap->usbhs_rev) {
631 case OMAP_USBHS_REV1:
632 omap->nports = 3;
633 break;
634 case OMAP_USBHS_REV2:
635 omap->nports = 2;
636 break;
637 default:
638 omap->nports = OMAP3_HS_USB_PORTS;
639 dev_dbg(dev,
640 "USB HOST Rev:0x%x not recognized, assuming %d ports\n",
641 omap->usbhs_rev, omap->nports);
642 break;
643 }
644 pdata->nports = omap->nports;
645 }
646
647 i = sizeof(struct clk *) * omap->nports;
648 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
649 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
650 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
651
652 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
653 dev_err(dev, "Memory allocation failed\n");
654 ret = -ENOMEM;
655 goto err_mem;
656 }
657
658 /* Set all clocks as invalid to begin with */
659 omap->ehci_logic_fck = ERR_PTR(-ENODEV);
660 omap->init_60m_fclk = ERR_PTR(-ENODEV);
661 omap->utmi_p1_gfclk = ERR_PTR(-ENODEV);
662 omap->utmi_p2_gfclk = ERR_PTR(-ENODEV);
663 omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV);
664 omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV);
665
666 for (i = 0; i < omap->nports; i++) {
667 omap->utmi_clk[i] = ERR_PTR(-ENODEV);
668 omap->hsic480m_clk[i] = ERR_PTR(-ENODEV);
669 omap->hsic60m_clk[i] = ERR_PTR(-ENODEV);
670 }
671
672 /* for OMAP3 i.e. USBHS REV1 */
673 if (omap->usbhs_rev == OMAP_USBHS_REV1) {
674 need_logic_fck = false;
675 for (i = 0; i < omap->nports; i++) {
676 if (is_ehci_phy_mode(pdata->port_mode[i]) ||
677 is_ehci_tll_mode(pdata->port_mode[i]) ||
678 is_ehci_hsic_mode(pdata->port_mode[i]))
679
680 need_logic_fck |= true;
681 }
682
683 if (need_logic_fck) {
684 omap->ehci_logic_fck = devm_clk_get(dev,
685 "usbhost_120m_fck");
686 if (IS_ERR(omap->ehci_logic_fck)) {
687 ret = PTR_ERR(omap->ehci_logic_fck);
688 dev_err(dev, "usbhost_120m_fck failed:%d\n",
689 ret);
690 goto err_mem;
691 }
692 }
693 goto initialize;
694 }
695
696 /* for OMAP4+ i.e. USBHS REV2+ */
697 omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk");
698 if (IS_ERR(omap->utmi_p1_gfclk)) {
699 ret = PTR_ERR(omap->utmi_p1_gfclk);
700 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
701 goto err_mem;
702 }
703
704 omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk");
705 if (IS_ERR(omap->utmi_p2_gfclk)) {
706 ret = PTR_ERR(omap->utmi_p2_gfclk);
707 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
708 goto err_mem;
709 }
710
711 omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1");
712 if (IS_ERR(omap->xclk60mhsp1_ck)) {
713 ret = PTR_ERR(omap->xclk60mhsp1_ck);
714 dev_err(dev, "refclk_60m_ext_p1 failed error:%d\n", ret);
715 goto err_mem;
716 }
717
718 omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2");
719 if (IS_ERR(omap->xclk60mhsp2_ck)) {
720 ret = PTR_ERR(omap->xclk60mhsp2_ck);
721 dev_err(dev, "refclk_60m_ext_p2 failed error:%d\n", ret);
722 goto err_mem;
723 }
724
725 omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int");
726 if (IS_ERR(omap->init_60m_fclk)) {
727 ret = PTR_ERR(omap->init_60m_fclk);
728 dev_err(dev, "refclk_60m_int failed error:%d\n", ret);
729 goto err_mem;
730 }
731
732 for (i = 0; i < omap->nports; i++) {
733 char clkname[30];
734
735 /* clock names are indexed from 1*/
736 snprintf(clkname, sizeof(clkname),
737 "usb_host_hs_utmi_p%d_clk", i + 1);
738
739 /* If a clock is not found we won't bail out as not all
740 * platforms have all clocks and we can function without
741 * them
742 */
743 omap->utmi_clk[i] = devm_clk_get(dev, clkname);
744 if (IS_ERR(omap->utmi_clk[i])) {
745 ret = PTR_ERR(omap->utmi_clk[i]);
746 dev_err(dev, "Failed to get clock : %s : %d\n",
747 clkname, ret);
748 goto err_mem;
749 }
750
751 snprintf(clkname, sizeof(clkname),
752 "usb_host_hs_hsic480m_p%d_clk", i + 1);
753 omap->hsic480m_clk[i] = devm_clk_get(dev, clkname);
754 if (IS_ERR(omap->hsic480m_clk[i])) {
755 ret = PTR_ERR(omap->hsic480m_clk[i]);
756 dev_err(dev, "Failed to get clock : %s : %d\n",
757 clkname, ret);
758 goto err_mem;
759 }
760
761 snprintf(clkname, sizeof(clkname),
762 "usb_host_hs_hsic60m_p%d_clk", i + 1);
763 omap->hsic60m_clk[i] = devm_clk_get(dev, clkname);
764 if (IS_ERR(omap->hsic60m_clk[i])) {
765 ret = PTR_ERR(omap->hsic60m_clk[i]);
766 dev_err(dev, "Failed to get clock : %s : %d\n",
767 clkname, ret);
768 goto err_mem;
769 }
770 }
771
772 if (is_ehci_phy_mode(pdata->port_mode[0])) {
773 ret = clk_set_parent(omap->utmi_p1_gfclk,
774 omap->xclk60mhsp1_ck);
775 if (ret != 0) {
776 dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n",
777 ret);
778 goto err_mem;
779 }
780 } else if (is_ehci_tll_mode(pdata->port_mode[0])) {
781 ret = clk_set_parent(omap->utmi_p1_gfclk,
782 omap->init_60m_fclk);
783 if (ret != 0) {
784 dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n",
785 ret);
786 goto err_mem;
787 }
788 }
789
790 if (is_ehci_phy_mode(pdata->port_mode[1])) {
791 ret = clk_set_parent(omap->utmi_p2_gfclk,
792 omap->xclk60mhsp2_ck);
793 if (ret != 0) {
794 dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n",
795 ret);
796 goto err_mem;
797 }
798 } else if (is_ehci_tll_mode(pdata->port_mode[1])) {
799 ret = clk_set_parent(omap->utmi_p2_gfclk,
800 omap->init_60m_fclk);
801 if (ret != 0) {
802 dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n",
803 ret);
804 goto err_mem;
805 }
806 }
807
808 initialize:
809 omap_usbhs_init(dev);
810
811 if (dev->of_node) {
812 ret = of_platform_populate(dev->of_node,
813 usbhs_child_match_table, NULL, dev);
814
815 if (ret) {
816 dev_err(dev, "Failed to create DT children: %d\n", ret);
817 goto err_mem;
818 }
819
820 } else {
821 ret = omap_usbhs_alloc_children(pdev);
822 if (ret) {
823 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
824 ret);
825 goto err_mem;
826 }
827 }
828
829 return 0;
830
831 err_mem:
832 pm_runtime_disable(dev);
833
834 return ret;
835 }
836
837 static int usbhs_omap_remove_child(struct device *dev, void *data)
838 {
839 dev_info(dev, "unregistering\n");
840 platform_device_unregister(to_platform_device(dev));
841 return 0;
842 }
843
844 /**
845 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
846 * @pdev: USB Host Controller being removed
847 *
848 * Reverses the effect of usbhs_omap_probe().
849 */
850 static int usbhs_omap_remove(struct platform_device *pdev)
851 {
852 pm_runtime_disable(&pdev->dev);
853
854 /* remove children */
855 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
856 return 0;
857 }
858
859 static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
860 .runtime_suspend = usbhs_runtime_suspend,
861 .runtime_resume = usbhs_runtime_resume,
862 };
863
864 static const struct of_device_id usbhs_omap_dt_ids[] = {
865 { .compatible = "ti,usbhs-host" },
866 { }
867 };
868
869 MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
870
871
872 static struct platform_driver usbhs_omap_driver = {
873 .driver = {
874 .name = (char *)usbhs_driver_name,
875 .pm = &usbhsomap_dev_pm_ops,
876 .of_match_table = usbhs_omap_dt_ids,
877 },
878 .remove = usbhs_omap_remove,
879 };
880
881 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
882 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
883 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
884 MODULE_LICENSE("GPL v2");
885 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
886
887 static int __init omap_usbhs_drvinit(void)
888 {
889 return platform_driver_probe(&usbhs_omap_driver, usbhs_omap_probe);
890 }
891
892 /*
893 * init before ehci and ohci drivers;
894 * The usbhs core driver should be initialized much before
895 * the omap ehci and ohci probe functions are called.
896 * This usbhs core driver should be initialized after
897 * usb tll driver
898 */
899 fs_initcall_sync(omap_usbhs_drvinit);
900
901 static void __exit omap_usbhs_drvexit(void)
902 {
903 platform_driver_unregister(&usbhs_omap_driver);
904 }
905 module_exit(omap_usbhs_drvexit);
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