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 const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
118 static u64 usbhs_dmamask = DMA_BIT_MASK(32);
119
120 /*-------------------------------------------------------------------------*/
121
usbhs_write(void __iomem * base,u32 reg,u32 val)122 static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
123 {
124 __raw_writel(val, base + reg);
125 }
126
usbhs_read(void __iomem * base,u32 reg)127 static inline u32 usbhs_read(void __iomem *base, u32 reg)
128 {
129 return __raw_readl(base + reg);
130 }
131
usbhs_writeb(void __iomem * base,u8 reg,u8 val)132 static inline void usbhs_writeb(void __iomem *base, u8 reg, u8 val)
133 {
134 __raw_writeb(val, base + reg);
135 }
136
usbhs_readb(void __iomem * base,u8 reg)137 static inline u8 usbhs_readb(void __iomem *base, u8 reg)
138 {
139 return __raw_readb(base + reg);
140 }
141
142 /*-------------------------------------------------------------------------*/
143
144 /**
145 * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
146 * to the device tree binding portN-mode found in
147 * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
148 */
149 static const char * const port_modes[] = {
150 [OMAP_USBHS_PORT_MODE_UNUSED] = "",
151 [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
152 [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
153 [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
154 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
155 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
156 [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
157 [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
158 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
159 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
160 [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
161 [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
162 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
163 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
164 };
165
166 /**
167 * omap_usbhs_get_dt_port_mode - Get the 'enum usbhs_omap_port_mode'
168 * from the port mode string.
169 * @mode: The port mode string, usually obtained from device tree.
170 *
171 * The function returns the 'enum usbhs_omap_port_mode' that matches the
172 * provided port mode string as per the port_modes table.
173 * If no match is found it returns -ENODEV
174 */
omap_usbhs_get_dt_port_mode(const char * mode)175 static const int omap_usbhs_get_dt_port_mode(const char *mode)
176 {
177 int i;
178
179 for (i = 0; i < ARRAY_SIZE(port_modes); i++) {
180 if (!strcmp(mode, port_modes[i]))
181 return i;
182 }
183
184 return -ENODEV;
185 }
186
omap_usbhs_alloc_child(const char * name,struct resource * res,int num_resources,void * pdata,size_t pdata_size,struct device * dev)187 static struct platform_device *omap_usbhs_alloc_child(const char *name,
188 struct resource *res, int num_resources, void *pdata,
189 size_t pdata_size, struct device *dev)
190 {
191 struct platform_device *child;
192 int ret;
193
194 child = platform_device_alloc(name, 0);
195
196 if (!child) {
197 dev_err(dev, "platform_device_alloc %s failed\n", name);
198 goto err_end;
199 }
200
201 ret = platform_device_add_resources(child, res, num_resources);
202 if (ret) {
203 dev_err(dev, "platform_device_add_resources failed\n");
204 goto err_alloc;
205 }
206
207 ret = platform_device_add_data(child, pdata, pdata_size);
208 if (ret) {
209 dev_err(dev, "platform_device_add_data failed\n");
210 goto err_alloc;
211 }
212
213 child->dev.dma_mask = &usbhs_dmamask;
214 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32));
215 child->dev.parent = dev;
216
217 ret = platform_device_add(child);
218 if (ret) {
219 dev_err(dev, "platform_device_add failed\n");
220 goto err_alloc;
221 }
222
223 return child;
224
225 err_alloc:
226 platform_device_put(child);
227
228 err_end:
229 return NULL;
230 }
231
omap_usbhs_alloc_children(struct platform_device * pdev)232 static int omap_usbhs_alloc_children(struct platform_device *pdev)
233 {
234 struct device *dev = &pdev->dev;
235 struct usbhs_omap_platform_data *pdata = dev->platform_data;
236 struct platform_device *ehci;
237 struct platform_device *ohci;
238 struct resource *res;
239 struct resource resources[2];
240 int ret;
241
242 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci");
243 if (!res) {
244 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n");
245 ret = -ENODEV;
246 goto err_end;
247 }
248 resources[0] = *res;
249
250 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq");
251 if (!res) {
252 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n");
253 ret = -ENODEV;
254 goto err_end;
255 }
256 resources[1] = *res;
257
258 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata,
259 sizeof(*pdata), dev);
260
261 if (!ehci) {
262 dev_err(dev, "omap_usbhs_alloc_child failed\n");
263 ret = -ENOMEM;
264 goto err_end;
265 }
266
267 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci");
268 if (!res) {
269 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n");
270 ret = -ENODEV;
271 goto err_ehci;
272 }
273 resources[0] = *res;
274
275 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq");
276 if (!res) {
277 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n");
278 ret = -ENODEV;
279 goto err_ehci;
280 }
281 resources[1] = *res;
282
283 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata,
284 sizeof(*pdata), dev);
285 if (!ohci) {
286 dev_err(dev, "omap_usbhs_alloc_child failed\n");
287 ret = -ENOMEM;
288 goto err_ehci;
289 }
290
291 return 0;
292
293 err_ehci:
294 platform_device_unregister(ehci);
295
296 err_end:
297 return ret;
298 }
299
is_ohci_port(enum usbhs_omap_port_mode pmode)300 static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
301 {
302 switch (pmode) {
303 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
304 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
305 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
306 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
307 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
308 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
309 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
310 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
311 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
312 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
313 return true;
314
315 default:
316 return false;
317 }
318 }
319
usbhs_runtime_resume(struct device * dev)320 static int usbhs_runtime_resume(struct device *dev)
321 {
322 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
323 struct usbhs_omap_platform_data *pdata = omap->pdata;
324 int i, r;
325
326 dev_dbg(dev, "usbhs_runtime_resume\n");
327
328 omap_tll_enable(pdata);
329
330 if (!IS_ERR(omap->ehci_logic_fck))
331 clk_enable(omap->ehci_logic_fck);
332
333 for (i = 0; i < omap->nports; i++) {
334 switch (pdata->port_mode[i]) {
335 case OMAP_EHCI_PORT_MODE_HSIC:
336 if (!IS_ERR(omap->hsic60m_clk[i])) {
337 r = clk_enable(omap->hsic60m_clk[i]);
338 if (r) {
339 dev_err(dev,
340 "Can't enable port %d hsic60m clk:%d\n",
341 i, r);
342 }
343 }
344
345 if (!IS_ERR(omap->hsic480m_clk[i])) {
346 r = clk_enable(omap->hsic480m_clk[i]);
347 if (r) {
348 dev_err(dev,
349 "Can't enable port %d hsic480m clk:%d\n",
350 i, r);
351 }
352 }
353 /* Fall through as HSIC mode needs utmi_clk */
354
355 case OMAP_EHCI_PORT_MODE_TLL:
356 if (!IS_ERR(omap->utmi_clk[i])) {
357 r = clk_enable(omap->utmi_clk[i]);
358 if (r) {
359 dev_err(dev,
360 "Can't enable port %d clk : %d\n",
361 i, r);
362 }
363 }
364 break;
365 default:
366 break;
367 }
368 }
369
370 return 0;
371 }
372
usbhs_runtime_suspend(struct device * dev)373 static int usbhs_runtime_suspend(struct device *dev)
374 {
375 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
376 struct usbhs_omap_platform_data *pdata = omap->pdata;
377 int i;
378
379 dev_dbg(dev, "usbhs_runtime_suspend\n");
380
381 for (i = 0; i < omap->nports; i++) {
382 switch (pdata->port_mode[i]) {
383 case OMAP_EHCI_PORT_MODE_HSIC:
384 if (!IS_ERR(omap->hsic60m_clk[i]))
385 clk_disable(omap->hsic60m_clk[i]);
386
387 if (!IS_ERR(omap->hsic480m_clk[i]))
388 clk_disable(omap->hsic480m_clk[i]);
389 /* Fall through as utmi_clks were used in HSIC mode */
390
391 case OMAP_EHCI_PORT_MODE_TLL:
392 if (!IS_ERR(omap->utmi_clk[i]))
393 clk_disable(omap->utmi_clk[i]);
394 break;
395 default:
396 break;
397 }
398 }
399
400 if (!IS_ERR(omap->ehci_logic_fck))
401 clk_disable(omap->ehci_logic_fck);
402
403 omap_tll_disable(pdata);
404
405 return 0;
406 }
407
omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap * omap,unsigned reg)408 static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
409 unsigned reg)
410 {
411 struct usbhs_omap_platform_data *pdata = omap->pdata;
412 int i;
413
414 for (i = 0; i < omap->nports; i++) {
415 switch (pdata->port_mode[i]) {
416 case OMAP_USBHS_PORT_MODE_UNUSED:
417 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i);
418 break;
419 case OMAP_EHCI_PORT_MODE_PHY:
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 default:
430 if (pdata->single_ulpi_bypass)
431 break;
432
433 if (i == 0)
434 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
435 else
436 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
437 << (i-1);
438 break;
439 }
440 }
441
442 if (pdata->single_ulpi_bypass) {
443 /* bypass ULPI only if none of the ports use PHY mode */
444 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
445
446 for (i = 0; i < omap->nports; i++) {
447 if (is_ehci_phy_mode(pdata->port_mode[i])) {
448 reg &= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
449 break;
450 }
451 }
452 }
453
454 return reg;
455 }
456
omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap * omap,unsigned reg)457 static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
458 unsigned reg)
459 {
460 struct usbhs_omap_platform_data *pdata = omap->pdata;
461 int i;
462
463 for (i = 0; i < omap->nports; i++) {
464 /* Clear port mode fields for PHY mode */
465 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i);
466
467 if (is_ehci_tll_mode(pdata->port_mode[i]) ||
468 (is_ohci_port(pdata->port_mode[i])))
469 reg |= OMAP4_P1_MODE_TLL << 2 * i;
470 else if (is_ehci_hsic_mode(pdata->port_mode[i]))
471 reg |= OMAP4_P1_MODE_HSIC << 2 * i;
472 }
473
474 return reg;
475 }
476
omap_usbhs_init(struct device * dev)477 static void omap_usbhs_init(struct device *dev)
478 {
479 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
480 unsigned reg;
481
482 dev_dbg(dev, "starting TI HSUSB Controller\n");
483
484 pm_runtime_get_sync(dev);
485
486 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
487 /* setup ULPI bypass and burst configurations */
488 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
489 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
490 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
491 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK;
492 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
493
494 switch (omap->usbhs_rev) {
495 case OMAP_USBHS_REV1:
496 reg = omap_usbhs_rev1_hostconfig(omap, reg);
497 break;
498
499 case OMAP_USBHS_REV2:
500 reg = omap_usbhs_rev2_hostconfig(omap, reg);
501 break;
502
503 default: /* newer revisions */
504 reg = omap_usbhs_rev2_hostconfig(omap, reg);
505 break;
506 }
507
508 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
509 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
510
511 pm_runtime_put_sync(dev);
512 }
513
usbhs_omap_get_dt_pdata(struct device * dev,struct usbhs_omap_platform_data * pdata)514 static int usbhs_omap_get_dt_pdata(struct device *dev,
515 struct usbhs_omap_platform_data *pdata)
516 {
517 int ret, i;
518 struct device_node *node = dev->of_node;
519
520 ret = of_property_read_u32(node, "num-ports", &pdata->nports);
521 if (ret)
522 pdata->nports = 0;
523
524 if (pdata->nports > OMAP3_HS_USB_PORTS) {
525 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
526 pdata->nports, OMAP3_HS_USB_PORTS);
527 return -ENODEV;
528 }
529
530 /* get port modes */
531 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
532 char prop[11];
533 const char *mode;
534
535 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
536
537 snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
538 ret = of_property_read_string(node, prop, &mode);
539 if (ret < 0)
540 continue;
541
542 ret = omap_usbhs_get_dt_port_mode(mode);
543 if (ret < 0) {
544 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
545 i, mode);
546 return -ENODEV;
547 }
548
549 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
550 pdata->port_mode[i] = ret;
551 }
552
553 /* get flags */
554 pdata->single_ulpi_bypass = of_property_read_bool(node,
555 "single-ulpi-bypass");
556
557 return 0;
558 }
559
560 static struct of_device_id usbhs_child_match_table[] = {
561 { .compatible = "ti,omap-ehci", },
562 { .compatible = "ti,omap-ohci", },
563 { }
564 };
565
566 /**
567 * usbhs_omap_probe - initialize TI-based HCDs
568 *
569 * Allocates basic resources for this USB host controller.
570 */
usbhs_omap_probe(struct platform_device * pdev)571 static int usbhs_omap_probe(struct platform_device *pdev)
572 {
573 struct device *dev = &pdev->dev;
574 struct usbhs_omap_platform_data *pdata = dev->platform_data;
575 struct usbhs_hcd_omap *omap;
576 struct resource *res;
577 int ret = 0;
578 int i;
579 bool need_logic_fck;
580
581 if (dev->of_node) {
582 /* For DT boot we populate platform data from OF node */
583 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
584 if (!pdata)
585 return -ENOMEM;
586
587 ret = usbhs_omap_get_dt_pdata(dev, pdata);
588 if (ret)
589 return ret;
590
591 dev->platform_data = pdata;
592 }
593
594 if (!pdata) {
595 dev_err(dev, "Missing platform data\n");
596 return -ENODEV;
597 }
598
599 if (pdata->nports > OMAP3_HS_USB_PORTS) {
600 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
601 pdata->nports, OMAP3_HS_USB_PORTS);
602 return -ENODEV;
603 }
604
605 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
606 if (!omap) {
607 dev_err(dev, "Memory allocation failed\n");
608 return -ENOMEM;
609 }
610
611 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
612 omap->uhh_base = devm_ioremap_resource(dev, res);
613 if (IS_ERR(omap->uhh_base))
614 return PTR_ERR(omap->uhh_base);
615
616 omap->pdata = pdata;
617
618 /* Initialize the TLL subsystem */
619 omap_tll_init(pdata);
620
621 pm_runtime_enable(dev);
622
623 platform_set_drvdata(pdev, omap);
624 pm_runtime_get_sync(dev);
625
626 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
627
628 /* we need to call runtime suspend before we update omap->nports
629 * to prevent unbalanced clk_disable()
630 */
631 pm_runtime_put_sync(dev);
632
633 /*
634 * If platform data contains nports then use that
635 * else make out number of ports from USBHS revision
636 */
637 if (pdata->nports) {
638 omap->nports = pdata->nports;
639 } else {
640 switch (omap->usbhs_rev) {
641 case OMAP_USBHS_REV1:
642 omap->nports = 3;
643 break;
644 case OMAP_USBHS_REV2:
645 omap->nports = 2;
646 break;
647 default:
648 omap->nports = OMAP3_HS_USB_PORTS;
649 dev_dbg(dev,
650 "USB HOST Rev:0x%d not recognized, assuming %d ports\n",
651 omap->usbhs_rev, omap->nports);
652 break;
653 }
654 pdata->nports = omap->nports;
655 }
656
657 i = sizeof(struct clk *) * omap->nports;
658 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
659 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
660 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
661
662 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
663 dev_err(dev, "Memory allocation failed\n");
664 ret = -ENOMEM;
665 goto err_mem;
666 }
667
668 need_logic_fck = false;
669 for (i = 0; i < omap->nports; i++) {
670 if (is_ehci_phy_mode(i) || is_ehci_tll_mode(i) ||
671 is_ehci_hsic_mode(i))
672 need_logic_fck |= true;
673 }
674
675 omap->ehci_logic_fck = ERR_PTR(-EINVAL);
676 if (need_logic_fck) {
677 omap->ehci_logic_fck = clk_get(dev, "ehci_logic_fck");
678 if (IS_ERR(omap->ehci_logic_fck)) {
679 ret = PTR_ERR(omap->ehci_logic_fck);
680 dev_dbg(dev, "ehci_logic_fck failed:%d\n", ret);
681 }
682 }
683
684 omap->utmi_p1_gfclk = clk_get(dev, "utmi_p1_gfclk");
685 if (IS_ERR(omap->utmi_p1_gfclk)) {
686 ret = PTR_ERR(omap->utmi_p1_gfclk);
687 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
688 goto err_p1_gfclk;
689 }
690
691 omap->utmi_p2_gfclk = clk_get(dev, "utmi_p2_gfclk");
692 if (IS_ERR(omap->utmi_p2_gfclk)) {
693 ret = PTR_ERR(omap->utmi_p2_gfclk);
694 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
695 goto err_p2_gfclk;
696 }
697
698 omap->xclk60mhsp1_ck = clk_get(dev, "xclk60mhsp1_ck");
699 if (IS_ERR(omap->xclk60mhsp1_ck)) {
700 ret = PTR_ERR(omap->xclk60mhsp1_ck);
701 dev_err(dev, "xclk60mhsp1_ck failed error:%d\n", ret);
702 goto err_xclk60mhsp1;
703 }
704
705 omap->xclk60mhsp2_ck = clk_get(dev, "xclk60mhsp2_ck");
706 if (IS_ERR(omap->xclk60mhsp2_ck)) {
707 ret = PTR_ERR(omap->xclk60mhsp2_ck);
708 dev_err(dev, "xclk60mhsp2_ck failed error:%d\n", ret);
709 goto err_xclk60mhsp2;
710 }
711
712 omap->init_60m_fclk = clk_get(dev, "init_60m_fclk");
713 if (IS_ERR(omap->init_60m_fclk)) {
714 ret = PTR_ERR(omap->init_60m_fclk);
715 dev_err(dev, "init_60m_fclk failed error:%d\n", ret);
716 goto err_init60m;
717 }
718
719 for (i = 0; i < omap->nports; i++) {
720 char clkname[30];
721
722 /* clock names are indexed from 1*/
723 snprintf(clkname, sizeof(clkname),
724 "usb_host_hs_utmi_p%d_clk", i + 1);
725
726 /* If a clock is not found we won't bail out as not all
727 * platforms have all clocks and we can function without
728 * them
729 */
730 omap->utmi_clk[i] = clk_get(dev, clkname);
731 if (IS_ERR(omap->utmi_clk[i]))
732 dev_dbg(dev, "Failed to get clock : %s : %ld\n",
733 clkname, PTR_ERR(omap->utmi_clk[i]));
734
735 snprintf(clkname, sizeof(clkname),
736 "usb_host_hs_hsic480m_p%d_clk", i + 1);
737 omap->hsic480m_clk[i] = clk_get(dev, clkname);
738 if (IS_ERR(omap->hsic480m_clk[i]))
739 dev_dbg(dev, "Failed to get clock : %s : %ld\n",
740 clkname, PTR_ERR(omap->hsic480m_clk[i]));
741
742 snprintf(clkname, sizeof(clkname),
743 "usb_host_hs_hsic60m_p%d_clk", i + 1);
744 omap->hsic60m_clk[i] = clk_get(dev, clkname);
745 if (IS_ERR(omap->hsic60m_clk[i]))
746 dev_dbg(dev, "Failed to get clock : %s : %ld\n",
747 clkname, PTR_ERR(omap->hsic60m_clk[i]));
748 }
749
750 if (is_ehci_phy_mode(pdata->port_mode[0])) {
751 /* for OMAP3, clk_set_parent fails */
752 ret = clk_set_parent(omap->utmi_p1_gfclk,
753 omap->xclk60mhsp1_ck);
754 if (ret != 0)
755 dev_dbg(dev, "xclk60mhsp1_ck set parent failed: %d\n",
756 ret);
757 } else if (is_ehci_tll_mode(pdata->port_mode[0])) {
758 ret = clk_set_parent(omap->utmi_p1_gfclk,
759 omap->init_60m_fclk);
760 if (ret != 0)
761 dev_dbg(dev, "P0 init_60m_fclk set parent failed: %d\n",
762 ret);
763 }
764
765 if (is_ehci_phy_mode(pdata->port_mode[1])) {
766 ret = clk_set_parent(omap->utmi_p2_gfclk,
767 omap->xclk60mhsp2_ck);
768 if (ret != 0)
769 dev_dbg(dev, "xclk60mhsp2_ck set parent failed: %d\n",
770 ret);
771 } else if (is_ehci_tll_mode(pdata->port_mode[1])) {
772 ret = clk_set_parent(omap->utmi_p2_gfclk,
773 omap->init_60m_fclk);
774 if (ret != 0)
775 dev_dbg(dev, "P1 init_60m_fclk set parent failed: %d\n",
776 ret);
777 }
778
779 omap_usbhs_init(dev);
780
781 if (dev->of_node) {
782 ret = of_platform_populate(dev->of_node,
783 usbhs_child_match_table, NULL, dev);
784
785 if (ret) {
786 dev_err(dev, "Failed to create DT children: %d\n", ret);
787 goto err_alloc;
788 }
789
790 } else {
791 ret = omap_usbhs_alloc_children(pdev);
792 if (ret) {
793 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
794 ret);
795 goto err_alloc;
796 }
797 }
798
799 return 0;
800
801 err_alloc:
802 for (i = 0; i < omap->nports; i++) {
803 if (!IS_ERR(omap->utmi_clk[i]))
804 clk_put(omap->utmi_clk[i]);
805 if (!IS_ERR(omap->hsic60m_clk[i]))
806 clk_put(omap->hsic60m_clk[i]);
807 if (!IS_ERR(omap->hsic480m_clk[i]))
808 clk_put(omap->hsic480m_clk[i]);
809 }
810
811 clk_put(omap->init_60m_fclk);
812
813 err_init60m:
814 clk_put(omap->xclk60mhsp2_ck);
815
816 err_xclk60mhsp2:
817 clk_put(omap->xclk60mhsp1_ck);
818
819 err_xclk60mhsp1:
820 clk_put(omap->utmi_p2_gfclk);
821
822 err_p2_gfclk:
823 clk_put(omap->utmi_p1_gfclk);
824
825 err_p1_gfclk:
826 if (!IS_ERR(omap->ehci_logic_fck))
827 clk_put(omap->ehci_logic_fck);
828
829 err_mem:
830 pm_runtime_disable(dev);
831
832 return ret;
833 }
834
usbhs_omap_remove_child(struct device * dev,void * data)835 static int usbhs_omap_remove_child(struct device *dev, void *data)
836 {
837 dev_info(dev, "unregistering\n");
838 platform_device_unregister(to_platform_device(dev));
839 return 0;
840 }
841
842 /**
843 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
844 * @pdev: USB Host Controller being removed
845 *
846 * Reverses the effect of usbhs_omap_probe().
847 */
usbhs_omap_remove(struct platform_device * pdev)848 static int usbhs_omap_remove(struct platform_device *pdev)
849 {
850 struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev);
851 int i;
852
853 for (i = 0; i < omap->nports; i++) {
854 if (!IS_ERR(omap->utmi_clk[i]))
855 clk_put(omap->utmi_clk[i]);
856 if (!IS_ERR(omap->hsic60m_clk[i]))
857 clk_put(omap->hsic60m_clk[i]);
858 if (!IS_ERR(omap->hsic480m_clk[i]))
859 clk_put(omap->hsic480m_clk[i]);
860 }
861
862 clk_put(omap->init_60m_fclk);
863 clk_put(omap->utmi_p1_gfclk);
864 clk_put(omap->utmi_p2_gfclk);
865 clk_put(omap->xclk60mhsp2_ck);
866 clk_put(omap->xclk60mhsp1_ck);
867
868 if (!IS_ERR(omap->ehci_logic_fck))
869 clk_put(omap->ehci_logic_fck);
870
871 pm_runtime_disable(&pdev->dev);
872
873 /* remove children */
874 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
875 return 0;
876 }
877
878 static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
879 .runtime_suspend = usbhs_runtime_suspend,
880 .runtime_resume = usbhs_runtime_resume,
881 };
882
883 static const struct of_device_id usbhs_omap_dt_ids[] = {
884 { .compatible = "ti,usbhs-host" },
885 { }
886 };
887
888 MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
889
890
891 static struct platform_driver usbhs_omap_driver = {
892 .driver = {
893 .name = (char *)usbhs_driver_name,
894 .owner = THIS_MODULE,
895 .pm = &usbhsomap_dev_pm_ops,
896 .of_match_table = of_match_ptr(usbhs_omap_dt_ids),
897 },
898 .remove = usbhs_omap_remove,
899 };
900
901 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
902 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
903 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
904 MODULE_LICENSE("GPL v2");
905 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
906
omap_usbhs_drvinit(void)907 static int __init omap_usbhs_drvinit(void)
908 {
909 return platform_driver_probe(&usbhs_omap_driver, usbhs_omap_probe);
910 }
911
912 /*
913 * init before ehci and ohci drivers;
914 * The usbhs core driver should be initialized much before
915 * the omap ehci and ohci probe functions are called.
916 * This usbhs core driver should be initialized after
917 * usb tll driver
918 */
919 fs_initcall_sync(omap_usbhs_drvinit);
920
omap_usbhs_drvexit(void)921 static void __exit omap_usbhs_drvexit(void)
922 {
923 platform_driver_unregister(&usbhs_omap_driver);
924 }
925 module_exit(omap_usbhs_drvexit);
926