1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * omap-usb-host.c - The USBHS core driver for OMAP EHCI & OHCI
4 *
5 * Copyright (C) 2011-2013 Texas Instruments Incorporated - https://www.ti.com
6 * Author: Keshava Munegowda <keshava_mgowda@ti.com>
7 * Author: Roger Quadros <rogerq@ti.com>
8 */
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/slab.h>
13 #include <linux/delay.h>
14 #include <linux/clk.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/platform_device.h>
17 #include <linux/platform_data/usb-omap.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/of.h>
20 #include <linux/of_platform.h>
21 #include <linux/err.h>
22
23 #include "omap-usb.h"
24
25 #define USBHS_DRIVER_NAME "usbhs_omap"
26 #define OMAP_EHCI_DEVICE "ehci-omap"
27 #define OMAP_OHCI_DEVICE "ohci-omap3"
28
29 /* OMAP USBHOST Register addresses */
30
31 /* UHH Register Set */
32 #define OMAP_UHH_REVISION (0x00)
33 #define OMAP_UHH_SYSCONFIG (0x10)
34 #define OMAP_UHH_SYSCONFIG_MIDLEMODE (1 << 12)
35 #define OMAP_UHH_SYSCONFIG_CACTIVITY (1 << 8)
36 #define OMAP_UHH_SYSCONFIG_SIDLEMODE (1 << 3)
37 #define OMAP_UHH_SYSCONFIG_ENAWAKEUP (1 << 2)
38 #define OMAP_UHH_SYSCONFIG_SOFTRESET (1 << 1)
39 #define OMAP_UHH_SYSCONFIG_AUTOIDLE (1 << 0)
40
41 #define OMAP_UHH_SYSSTATUS (0x14)
42 #define OMAP_UHH_HOSTCONFIG (0x40)
43 #define OMAP_UHH_HOSTCONFIG_ULPI_BYPASS (1 << 0)
44 #define OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS (1 << 0)
45 #define OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS (1 << 11)
46 #define OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS (1 << 12)
47 #define OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN (1 << 2)
48 #define OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN (1 << 3)
49 #define OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN (1 << 4)
50 #define OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN (1 << 5)
51 #define OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS (1 << 8)
52 #define OMAP_UHH_HOSTCONFIG_P2_CONNECT_STATUS (1 << 9)
53 #define OMAP_UHH_HOSTCONFIG_P3_CONNECT_STATUS (1 << 10)
54 #define OMAP4_UHH_HOSTCONFIG_APP_START_CLK (1 << 31)
55
56 /* OMAP4-specific defines */
57 #define OMAP4_UHH_SYSCONFIG_IDLEMODE_CLEAR (3 << 2)
58 #define OMAP4_UHH_SYSCONFIG_NOIDLE (1 << 2)
59 #define OMAP4_UHH_SYSCONFIG_STDBYMODE_CLEAR (3 << 4)
60 #define OMAP4_UHH_SYSCONFIG_NOSTDBY (1 << 4)
61 #define OMAP4_UHH_SYSCONFIG_SOFTRESET (1 << 0)
62
63 #define OMAP4_P1_MODE_CLEAR (3 << 16)
64 #define OMAP4_P1_MODE_TLL (1 << 16)
65 #define OMAP4_P1_MODE_HSIC (3 << 16)
66 #define OMAP4_P2_MODE_CLEAR (3 << 18)
67 #define OMAP4_P2_MODE_TLL (1 << 18)
68 #define OMAP4_P2_MODE_HSIC (3 << 18)
69
70 #define OMAP_UHH_DEBUG_CSR (0x44)
71
72 /* Values of UHH_REVISION - Note: these are not given in the TRM */
73 #define OMAP_USBHS_REV1 0x00000010 /* OMAP3 */
74 #define OMAP_USBHS_REV2 0x50700100 /* OMAP4 */
75
76 #define is_omap_usbhs_rev1(x) (x->usbhs_rev == OMAP_USBHS_REV1)
77 #define is_omap_usbhs_rev2(x) (x->usbhs_rev == OMAP_USBHS_REV2)
78
79 #define is_ehci_phy_mode(x) (x == OMAP_EHCI_PORT_MODE_PHY)
80 #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
81 #define is_ehci_hsic_mode(x) (x == OMAP_EHCI_PORT_MODE_HSIC)
82
83
84 struct usbhs_hcd_omap {
85 int nports;
86 struct clk **utmi_clk;
87 struct clk **hsic60m_clk;
88 struct clk **hsic480m_clk;
89
90 struct clk *xclk60mhsp1_ck;
91 struct clk *xclk60mhsp2_ck;
92 struct clk *utmi_p1_gfclk;
93 struct clk *utmi_p2_gfclk;
94 struct clk *init_60m_fclk;
95 struct clk *ehci_logic_fck;
96
97 void __iomem *uhh_base;
98
99 struct usbhs_omap_platform_data *pdata;
100
101 u32 usbhs_rev;
102 };
103 /*-------------------------------------------------------------------------*/
104
105 static const char usbhs_driver_name[] = USBHS_DRIVER_NAME;
106 static u64 usbhs_dmamask = DMA_BIT_MASK(32);
107
108 /*-------------------------------------------------------------------------*/
109
usbhs_write(void __iomem * base,u32 reg,u32 val)110 static inline void usbhs_write(void __iomem *base, u32 reg, u32 val)
111 {
112 writel_relaxed(val, base + reg);
113 }
114
usbhs_read(void __iomem * base,u32 reg)115 static inline u32 usbhs_read(void __iomem *base, u32 reg)
116 {
117 return readl_relaxed(base + reg);
118 }
119
120 /*-------------------------------------------------------------------------*/
121
122 /*
123 * Map 'enum usbhs_omap_port_mode' found in <linux/platform_data/usb-omap.h>
124 * to the device tree binding portN-mode found in
125 * 'Documentation/devicetree/bindings/mfd/omap-usb-host.txt'
126 */
127 static const char * const port_modes[] = {
128 [OMAP_USBHS_PORT_MODE_UNUSED] = "",
129 [OMAP_EHCI_PORT_MODE_PHY] = "ehci-phy",
130 [OMAP_EHCI_PORT_MODE_TLL] = "ehci-tll",
131 [OMAP_EHCI_PORT_MODE_HSIC] = "ehci-hsic",
132 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0] = "ohci-phy-6pin-datse0",
133 [OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM] = "ohci-phy-6pin-dpdm",
134 [OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0] = "ohci-phy-3pin-datse0",
135 [OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM] = "ohci-phy-4pin-dpdm",
136 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0] = "ohci-tll-6pin-datse0",
137 [OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM] = "ohci-tll-6pin-dpdm",
138 [OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0] = "ohci-tll-3pin-datse0",
139 [OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM] = "ohci-tll-4pin-dpdm",
140 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0] = "ohci-tll-2pin-datse0",
141 [OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM] = "ohci-tll-2pin-dpdm",
142 };
143
omap_usbhs_alloc_child(const char * name,struct resource * res,int num_resources,void * pdata,size_t pdata_size,struct device * dev)144 static struct platform_device *omap_usbhs_alloc_child(const char *name,
145 struct resource *res, int num_resources, void *pdata,
146 size_t pdata_size, struct device *dev)
147 {
148 struct platform_device *child;
149 int ret;
150
151 child = platform_device_alloc(name, 0);
152
153 if (!child) {
154 dev_err(dev, "platform_device_alloc %s failed\n", name);
155 goto err_end;
156 }
157
158 ret = platform_device_add_resources(child, res, num_resources);
159 if (ret) {
160 dev_err(dev, "platform_device_add_resources failed\n");
161 goto err_alloc;
162 }
163
164 ret = platform_device_add_data(child, pdata, pdata_size);
165 if (ret) {
166 dev_err(dev, "platform_device_add_data failed\n");
167 goto err_alloc;
168 }
169
170 child->dev.dma_mask = &usbhs_dmamask;
171 dma_set_coherent_mask(&child->dev, DMA_BIT_MASK(32));
172 child->dev.parent = dev;
173
174 ret = platform_device_add(child);
175 if (ret) {
176 dev_err(dev, "platform_device_add failed\n");
177 goto err_alloc;
178 }
179
180 return child;
181
182 err_alloc:
183 platform_device_put(child);
184
185 err_end:
186 return NULL;
187 }
188
omap_usbhs_alloc_children(struct platform_device * pdev)189 static int omap_usbhs_alloc_children(struct platform_device *pdev)
190 {
191 struct device *dev = &pdev->dev;
192 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
193 struct platform_device *ehci;
194 struct platform_device *ohci;
195 struct resource *res;
196 struct resource resources[2];
197 int ret;
198
199 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ehci");
200 if (!res) {
201 dev_err(dev, "EHCI get resource IORESOURCE_MEM failed\n");
202 ret = -ENODEV;
203 goto err_end;
204 }
205 resources[0] = *res;
206
207 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ehci-irq");
208 if (!res) {
209 dev_err(dev, " EHCI get resource IORESOURCE_IRQ failed\n");
210 ret = -ENODEV;
211 goto err_end;
212 }
213 resources[1] = *res;
214
215 ehci = omap_usbhs_alloc_child(OMAP_EHCI_DEVICE, resources, 2, pdata,
216 sizeof(*pdata), dev);
217
218 if (!ehci) {
219 dev_err(dev, "omap_usbhs_alloc_child failed\n");
220 ret = -ENOMEM;
221 goto err_end;
222 }
223
224 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ohci");
225 if (!res) {
226 dev_err(dev, "OHCI get resource IORESOURCE_MEM failed\n");
227 ret = -ENODEV;
228 goto err_ehci;
229 }
230 resources[0] = *res;
231
232 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ohci-irq");
233 if (!res) {
234 dev_err(dev, "OHCI get resource IORESOURCE_IRQ failed\n");
235 ret = -ENODEV;
236 goto err_ehci;
237 }
238 resources[1] = *res;
239
240 ohci = omap_usbhs_alloc_child(OMAP_OHCI_DEVICE, resources, 2, pdata,
241 sizeof(*pdata), dev);
242 if (!ohci) {
243 dev_err(dev, "omap_usbhs_alloc_child failed\n");
244 ret = -ENOMEM;
245 goto err_ehci;
246 }
247
248 return 0;
249
250 err_ehci:
251 platform_device_unregister(ehci);
252
253 err_end:
254 return ret;
255 }
256
is_ohci_port(enum usbhs_omap_port_mode pmode)257 static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
258 {
259 switch (pmode) {
260 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
261 case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
262 case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
263 case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
264 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
265 case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
266 case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
267 case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
268 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
269 case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
270 return true;
271
272 default:
273 return false;
274 }
275 }
276
usbhs_runtime_resume(struct device * dev)277 static int usbhs_runtime_resume(struct device *dev)
278 {
279 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
280 struct usbhs_omap_platform_data *pdata = omap->pdata;
281 int i, r;
282
283 dev_dbg(dev, "usbhs_runtime_resume\n");
284
285 omap_tll_enable(pdata);
286
287 if (!IS_ERR(omap->ehci_logic_fck))
288 clk_prepare_enable(omap->ehci_logic_fck);
289
290 for (i = 0; i < omap->nports; i++) {
291 switch (pdata->port_mode[i]) {
292 case OMAP_EHCI_PORT_MODE_HSIC:
293 if (!IS_ERR(omap->hsic60m_clk[i])) {
294 r = clk_prepare_enable(omap->hsic60m_clk[i]);
295 if (r) {
296 dev_err(dev,
297 "Can't enable port %d hsic60m clk:%d\n",
298 i, r);
299 }
300 }
301
302 if (!IS_ERR(omap->hsic480m_clk[i])) {
303 r = clk_prepare_enable(omap->hsic480m_clk[i]);
304 if (r) {
305 dev_err(dev,
306 "Can't enable port %d hsic480m clk:%d\n",
307 i, r);
308 }
309 }
310 fallthrough; /* as HSIC mode needs utmi_clk */
311
312 case OMAP_EHCI_PORT_MODE_TLL:
313 if (!IS_ERR(omap->utmi_clk[i])) {
314 r = clk_prepare_enable(omap->utmi_clk[i]);
315 if (r) {
316 dev_err(dev,
317 "Can't enable port %d clk : %d\n",
318 i, r);
319 }
320 }
321 break;
322 default:
323 break;
324 }
325 }
326
327 return 0;
328 }
329
usbhs_runtime_suspend(struct device * dev)330 static int usbhs_runtime_suspend(struct device *dev)
331 {
332 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
333 struct usbhs_omap_platform_data *pdata = omap->pdata;
334 int i;
335
336 dev_dbg(dev, "usbhs_runtime_suspend\n");
337
338 for (i = 0; i < omap->nports; i++) {
339 switch (pdata->port_mode[i]) {
340 case OMAP_EHCI_PORT_MODE_HSIC:
341 if (!IS_ERR(omap->hsic60m_clk[i]))
342 clk_disable_unprepare(omap->hsic60m_clk[i]);
343
344 if (!IS_ERR(omap->hsic480m_clk[i]))
345 clk_disable_unprepare(omap->hsic480m_clk[i]);
346 fallthrough; /* as utmi_clks were used in HSIC mode */
347
348 case OMAP_EHCI_PORT_MODE_TLL:
349 if (!IS_ERR(omap->utmi_clk[i]))
350 clk_disable_unprepare(omap->utmi_clk[i]);
351 break;
352 default:
353 break;
354 }
355 }
356
357 if (!IS_ERR(omap->ehci_logic_fck))
358 clk_disable_unprepare(omap->ehci_logic_fck);
359
360 omap_tll_disable(pdata);
361
362 return 0;
363 }
364
omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap * omap,unsigned reg)365 static unsigned omap_usbhs_rev1_hostconfig(struct usbhs_hcd_omap *omap,
366 unsigned reg)
367 {
368 struct usbhs_omap_platform_data *pdata = omap->pdata;
369 int i;
370
371 for (i = 0; i < omap->nports; i++) {
372 switch (pdata->port_mode[i]) {
373 case OMAP_USBHS_PORT_MODE_UNUSED:
374 reg &= ~(OMAP_UHH_HOSTCONFIG_P1_CONNECT_STATUS << i);
375 break;
376 case OMAP_EHCI_PORT_MODE_PHY:
377 if (pdata->single_ulpi_bypass)
378 break;
379
380 if (i == 0)
381 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
382 else
383 reg &= ~(OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
384 << (i-1));
385 break;
386 default:
387 if (pdata->single_ulpi_bypass)
388 break;
389
390 if (i == 0)
391 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS;
392 else
393 reg |= OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS
394 << (i-1);
395 break;
396 }
397 }
398
399 if (pdata->single_ulpi_bypass) {
400 /* bypass ULPI only if none of the ports use PHY mode */
401 reg |= OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
402
403 for (i = 0; i < omap->nports; i++) {
404 if (is_ehci_phy_mode(pdata->port_mode[i])) {
405 reg &= ~OMAP_UHH_HOSTCONFIG_ULPI_BYPASS;
406 break;
407 }
408 }
409 }
410
411 return reg;
412 }
413
omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap * omap,unsigned reg)414 static unsigned omap_usbhs_rev2_hostconfig(struct usbhs_hcd_omap *omap,
415 unsigned reg)
416 {
417 struct usbhs_omap_platform_data *pdata = omap->pdata;
418 int i;
419
420 for (i = 0; i < omap->nports; i++) {
421 /* Clear port mode fields for PHY mode */
422 reg &= ~(OMAP4_P1_MODE_CLEAR << 2 * i);
423
424 if (is_ehci_tll_mode(pdata->port_mode[i]) ||
425 (is_ohci_port(pdata->port_mode[i])))
426 reg |= OMAP4_P1_MODE_TLL << 2 * i;
427 else if (is_ehci_hsic_mode(pdata->port_mode[i]))
428 reg |= OMAP4_P1_MODE_HSIC << 2 * i;
429 }
430
431 return reg;
432 }
433
omap_usbhs_init(struct device * dev)434 static void omap_usbhs_init(struct device *dev)
435 {
436 struct usbhs_hcd_omap *omap = dev_get_drvdata(dev);
437 unsigned reg;
438
439 dev_dbg(dev, "starting TI HSUSB Controller\n");
440
441 pm_runtime_get_sync(dev);
442
443 reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG);
444 /* setup ULPI bypass and burst configurations */
445 reg |= (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
446 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
447 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN);
448 reg |= OMAP4_UHH_HOSTCONFIG_APP_START_CLK;
449 reg &= ~OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN;
450
451 switch (omap->usbhs_rev) {
452 case OMAP_USBHS_REV1:
453 reg = omap_usbhs_rev1_hostconfig(omap, reg);
454 break;
455
456 case OMAP_USBHS_REV2:
457 reg = omap_usbhs_rev2_hostconfig(omap, reg);
458 break;
459
460 default: /* newer revisions */
461 reg = omap_usbhs_rev2_hostconfig(omap, reg);
462 break;
463 }
464
465 usbhs_write(omap->uhh_base, OMAP_UHH_HOSTCONFIG, reg);
466 dev_dbg(dev, "UHH setup done, uhh_hostconfig=%x\n", reg);
467
468 pm_runtime_put_sync(dev);
469 }
470
usbhs_omap_get_dt_pdata(struct device * dev,struct usbhs_omap_platform_data * pdata)471 static int usbhs_omap_get_dt_pdata(struct device *dev,
472 struct usbhs_omap_platform_data *pdata)
473 {
474 int ret, i;
475 struct device_node *node = dev->of_node;
476
477 ret = of_property_read_u32(node, "num-ports", &pdata->nports);
478 if (ret)
479 pdata->nports = 0;
480
481 if (pdata->nports > OMAP3_HS_USB_PORTS) {
482 dev_warn(dev, "Too many num_ports <%d> in device tree. Max %d\n",
483 pdata->nports, OMAP3_HS_USB_PORTS);
484 return -ENODEV;
485 }
486
487 /* get port modes */
488 for (i = 0; i < OMAP3_HS_USB_PORTS; i++) {
489 char prop[11];
490 const char *mode;
491
492 pdata->port_mode[i] = OMAP_USBHS_PORT_MODE_UNUSED;
493
494 snprintf(prop, sizeof(prop), "port%d-mode", i + 1);
495 ret = of_property_read_string(node, prop, &mode);
496 if (ret < 0)
497 continue;
498
499 /* get 'enum usbhs_omap_port_mode' from port mode string */
500 ret = match_string(port_modes, ARRAY_SIZE(port_modes), mode);
501 if (ret < 0) {
502 dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
503 i, mode);
504 return -ENODEV;
505 }
506
507 dev_dbg(dev, "port%d-mode: %s -> %d\n", i, mode, ret);
508 pdata->port_mode[i] = ret;
509 }
510
511 /* get flags */
512 pdata->single_ulpi_bypass = of_property_read_bool(node,
513 "single-ulpi-bypass");
514
515 return 0;
516 }
517
518 static const struct of_device_id usbhs_child_match_table[] = {
519 { .compatible = "ti,ehci-omap", },
520 { .compatible = "ti,ohci-omap3", },
521 { }
522 };
523
524 /**
525 * usbhs_omap_probe - initialize TI-based HCDs
526 *
527 * Allocates basic resources for this USB host controller.
528 *
529 * @pdev: Pointer to this device's platform device structure
530 */
usbhs_omap_probe(struct platform_device * pdev)531 static int usbhs_omap_probe(struct platform_device *pdev)
532 {
533 struct device *dev = &pdev->dev;
534 struct usbhs_omap_platform_data *pdata = dev_get_platdata(dev);
535 struct usbhs_hcd_omap *omap;
536 int ret = 0;
537 int i;
538 bool need_logic_fck;
539
540 if (dev->of_node) {
541 /* For DT boot we populate platform data from OF node */
542 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
543 if (!pdata)
544 return -ENOMEM;
545
546 ret = usbhs_omap_get_dt_pdata(dev, pdata);
547 if (ret)
548 return ret;
549
550 dev->platform_data = pdata;
551 }
552
553 if (!pdata) {
554 dev_err(dev, "Missing platform data\n");
555 return -ENODEV;
556 }
557
558 if (pdata->nports > OMAP3_HS_USB_PORTS) {
559 dev_info(dev, "Too many num_ports <%d> in platform_data. Max %d\n",
560 pdata->nports, OMAP3_HS_USB_PORTS);
561 return -ENODEV;
562 }
563
564 omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
565 if (!omap) {
566 dev_err(dev, "Memory allocation failed\n");
567 return -ENOMEM;
568 }
569
570 omap->uhh_base = devm_platform_ioremap_resource(pdev, 0);
571 if (IS_ERR(omap->uhh_base))
572 return PTR_ERR(omap->uhh_base);
573
574 omap->pdata = pdata;
575
576 /* Initialize the TLL subsystem */
577 omap_tll_init(pdata);
578
579 pm_runtime_enable(dev);
580
581 platform_set_drvdata(pdev, omap);
582 pm_runtime_get_sync(dev);
583
584 omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION);
585
586 /* we need to call runtime suspend before we update omap->nports
587 * to prevent unbalanced clk_disable()
588 */
589 pm_runtime_put_sync(dev);
590
591 /*
592 * If platform data contains nports then use that
593 * else make out number of ports from USBHS revision
594 */
595 if (pdata->nports) {
596 omap->nports = pdata->nports;
597 } else {
598 switch (omap->usbhs_rev) {
599 case OMAP_USBHS_REV1:
600 omap->nports = 3;
601 break;
602 case OMAP_USBHS_REV2:
603 omap->nports = 2;
604 break;
605 default:
606 omap->nports = OMAP3_HS_USB_PORTS;
607 dev_dbg(dev,
608 "USB HOST Rev:0x%x not recognized, assuming %d ports\n",
609 omap->usbhs_rev, omap->nports);
610 break;
611 }
612 pdata->nports = omap->nports;
613 }
614
615 i = sizeof(struct clk *) * omap->nports;
616 omap->utmi_clk = devm_kzalloc(dev, i, GFP_KERNEL);
617 omap->hsic480m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
618 omap->hsic60m_clk = devm_kzalloc(dev, i, GFP_KERNEL);
619
620 if (!omap->utmi_clk || !omap->hsic480m_clk || !omap->hsic60m_clk) {
621 dev_err(dev, "Memory allocation failed\n");
622 ret = -ENOMEM;
623 goto err_mem;
624 }
625
626 /* Set all clocks as invalid to begin with */
627 omap->ehci_logic_fck = ERR_PTR(-ENODEV);
628 omap->init_60m_fclk = ERR_PTR(-ENODEV);
629 omap->utmi_p1_gfclk = ERR_PTR(-ENODEV);
630 omap->utmi_p2_gfclk = ERR_PTR(-ENODEV);
631 omap->xclk60mhsp1_ck = ERR_PTR(-ENODEV);
632 omap->xclk60mhsp2_ck = ERR_PTR(-ENODEV);
633
634 for (i = 0; i < omap->nports; i++) {
635 omap->utmi_clk[i] = ERR_PTR(-ENODEV);
636 omap->hsic480m_clk[i] = ERR_PTR(-ENODEV);
637 omap->hsic60m_clk[i] = ERR_PTR(-ENODEV);
638 }
639
640 /* for OMAP3 i.e. USBHS REV1 */
641 if (omap->usbhs_rev == OMAP_USBHS_REV1) {
642 need_logic_fck = false;
643 for (i = 0; i < omap->nports; i++) {
644 if (is_ehci_phy_mode(pdata->port_mode[i]) ||
645 is_ehci_tll_mode(pdata->port_mode[i]) ||
646 is_ehci_hsic_mode(pdata->port_mode[i]))
647
648 need_logic_fck |= true;
649 }
650
651 if (need_logic_fck) {
652 omap->ehci_logic_fck = devm_clk_get(dev,
653 "usbhost_120m_fck");
654 if (IS_ERR(omap->ehci_logic_fck)) {
655 ret = PTR_ERR(omap->ehci_logic_fck);
656 dev_err(dev, "usbhost_120m_fck failed:%d\n",
657 ret);
658 goto err_mem;
659 }
660 }
661 goto initialize;
662 }
663
664 /* for OMAP4+ i.e. USBHS REV2+ */
665 omap->utmi_p1_gfclk = devm_clk_get(dev, "utmi_p1_gfclk");
666 if (IS_ERR(omap->utmi_p1_gfclk)) {
667 ret = PTR_ERR(omap->utmi_p1_gfclk);
668 dev_err(dev, "utmi_p1_gfclk failed error:%d\n", ret);
669 goto err_mem;
670 }
671
672 omap->utmi_p2_gfclk = devm_clk_get(dev, "utmi_p2_gfclk");
673 if (IS_ERR(omap->utmi_p2_gfclk)) {
674 ret = PTR_ERR(omap->utmi_p2_gfclk);
675 dev_err(dev, "utmi_p2_gfclk failed error:%d\n", ret);
676 goto err_mem;
677 }
678
679 omap->xclk60mhsp1_ck = devm_clk_get(dev, "refclk_60m_ext_p1");
680 if (IS_ERR(omap->xclk60mhsp1_ck)) {
681 ret = PTR_ERR(omap->xclk60mhsp1_ck);
682 dev_err(dev, "refclk_60m_ext_p1 failed error:%d\n", ret);
683 goto err_mem;
684 }
685
686 omap->xclk60mhsp2_ck = devm_clk_get(dev, "refclk_60m_ext_p2");
687 if (IS_ERR(omap->xclk60mhsp2_ck)) {
688 ret = PTR_ERR(omap->xclk60mhsp2_ck);
689 dev_err(dev, "refclk_60m_ext_p2 failed error:%d\n", ret);
690 goto err_mem;
691 }
692
693 omap->init_60m_fclk = devm_clk_get(dev, "refclk_60m_int");
694 if (IS_ERR(omap->init_60m_fclk)) {
695 ret = PTR_ERR(omap->init_60m_fclk);
696 dev_err(dev, "refclk_60m_int failed error:%d\n", ret);
697 goto err_mem;
698 }
699
700 for (i = 0; i < omap->nports; i++) {
701 char clkname[40];
702
703 /* clock names are indexed from 1*/
704 snprintf(clkname, sizeof(clkname),
705 "usb_host_hs_utmi_p%d_clk", i + 1);
706
707 /* If a clock is not found we won't bail out as not all
708 * platforms have all clocks and we can function without
709 * them
710 */
711 omap->utmi_clk[i] = devm_clk_get(dev, clkname);
712 if (IS_ERR(omap->utmi_clk[i])) {
713 ret = PTR_ERR(omap->utmi_clk[i]);
714 dev_err(dev, "Failed to get clock : %s : %d\n",
715 clkname, ret);
716 goto err_mem;
717 }
718
719 snprintf(clkname, sizeof(clkname),
720 "usb_host_hs_hsic480m_p%d_clk", i + 1);
721 omap->hsic480m_clk[i] = devm_clk_get(dev, clkname);
722 if (IS_ERR(omap->hsic480m_clk[i])) {
723 ret = PTR_ERR(omap->hsic480m_clk[i]);
724 dev_err(dev, "Failed to get clock : %s : %d\n",
725 clkname, ret);
726 goto err_mem;
727 }
728
729 snprintf(clkname, sizeof(clkname),
730 "usb_host_hs_hsic60m_p%d_clk", i + 1);
731 omap->hsic60m_clk[i] = devm_clk_get(dev, clkname);
732 if (IS_ERR(omap->hsic60m_clk[i])) {
733 ret = PTR_ERR(omap->hsic60m_clk[i]);
734 dev_err(dev, "Failed to get clock : %s : %d\n",
735 clkname, ret);
736 goto err_mem;
737 }
738 }
739
740 if (is_ehci_phy_mode(pdata->port_mode[0])) {
741 ret = clk_set_parent(omap->utmi_p1_gfclk,
742 omap->xclk60mhsp1_ck);
743 if (ret != 0) {
744 dev_err(dev, "xclk60mhsp1_ck set parent failed: %d\n",
745 ret);
746 goto err_mem;
747 }
748 } else if (is_ehci_tll_mode(pdata->port_mode[0])) {
749 ret = clk_set_parent(omap->utmi_p1_gfclk,
750 omap->init_60m_fclk);
751 if (ret != 0) {
752 dev_err(dev, "P0 init_60m_fclk set parent failed: %d\n",
753 ret);
754 goto err_mem;
755 }
756 }
757
758 if (is_ehci_phy_mode(pdata->port_mode[1])) {
759 ret = clk_set_parent(omap->utmi_p2_gfclk,
760 omap->xclk60mhsp2_ck);
761 if (ret != 0) {
762 dev_err(dev, "xclk60mhsp2_ck set parent failed: %d\n",
763 ret);
764 goto err_mem;
765 }
766 } else if (is_ehci_tll_mode(pdata->port_mode[1])) {
767 ret = clk_set_parent(omap->utmi_p2_gfclk,
768 omap->init_60m_fclk);
769 if (ret != 0) {
770 dev_err(dev, "P1 init_60m_fclk set parent failed: %d\n",
771 ret);
772 goto err_mem;
773 }
774 }
775
776 initialize:
777 omap_usbhs_init(dev);
778
779 if (dev->of_node) {
780 ret = of_platform_populate(dev->of_node,
781 usbhs_child_match_table, NULL, dev);
782
783 if (ret) {
784 dev_err(dev, "Failed to create DT children: %d\n", ret);
785 goto err_mem;
786 }
787
788 } else {
789 ret = omap_usbhs_alloc_children(pdev);
790 if (ret) {
791 dev_err(dev, "omap_usbhs_alloc_children failed: %d\n",
792 ret);
793 goto err_mem;
794 }
795 }
796
797 return 0;
798
799 err_mem:
800 pm_runtime_disable(dev);
801
802 return ret;
803 }
804
usbhs_omap_remove_child(struct device * dev,void * data)805 static int usbhs_omap_remove_child(struct device *dev, void *data)
806 {
807 dev_info(dev, "unregistering\n");
808 platform_device_unregister(to_platform_device(dev));
809 return 0;
810 }
811
812 /**
813 * usbhs_omap_remove - shutdown processing for UHH & TLL HCDs
814 * @pdev: USB Host Controller being removed
815 *
816 * Reverses the effect of usbhs_omap_probe().
817 */
usbhs_omap_remove(struct platform_device * pdev)818 static void usbhs_omap_remove(struct platform_device *pdev)
819 {
820 pm_runtime_disable(&pdev->dev);
821
822 /* remove children */
823 device_for_each_child(&pdev->dev, NULL, usbhs_omap_remove_child);
824 }
825
826 static const struct dev_pm_ops usbhsomap_dev_pm_ops = {
827 .runtime_suspend = usbhs_runtime_suspend,
828 .runtime_resume = usbhs_runtime_resume,
829 };
830
831 static const struct of_device_id usbhs_omap_dt_ids[] = {
832 { .compatible = "ti,usbhs-host" },
833 { }
834 };
835
836 MODULE_DEVICE_TABLE(of, usbhs_omap_dt_ids);
837
838
839 static struct platform_driver usbhs_omap_driver = {
840 .driver = {
841 .name = usbhs_driver_name,
842 .pm = &usbhsomap_dev_pm_ops,
843 .of_match_table = usbhs_omap_dt_ids,
844 },
845 .probe = usbhs_omap_probe,
846 .remove = usbhs_omap_remove,
847 };
848
849 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
850 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
851 MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
852 MODULE_DESCRIPTION("usb host common core driver for omap EHCI and OHCI");
853
omap_usbhs_drvinit(void)854 static int omap_usbhs_drvinit(void)
855 {
856 return platform_driver_register(&usbhs_omap_driver);
857 }
858
859 /*
860 * init before ehci and ohci drivers;
861 * The usbhs core driver should be initialized much before
862 * the omap ehci and ohci probe functions are called.
863 * This usbhs core driver should be initialized after
864 * usb tll driver
865 */
866 fs_initcall_sync(omap_usbhs_drvinit);
867
omap_usbhs_drvexit(void)868 static void omap_usbhs_drvexit(void)
869 {
870 platform_driver_unregister(&usbhs_omap_driver);
871 }
872 module_exit(omap_usbhs_drvexit);
873