2 * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
4 * Copyright (C) 2004 Texas Instruments, Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/platform_device.h>
35 /* These routines should handle the standard chip-specific modes
36 * for usb0/1/2 ports, covering basic mux and transceiver setup.
38 * Some board-*.c files will need to set up additional mux options,
39 * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
43 * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
44 * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
45 * - 5912 OSK UDC, with *nonstandard* A-to-A cable
46 * - 1510 Innovator UDC with bundled usb0 cable
47 * - 1510 Innovator OHCI with bundled usb1/usb2 cable
48 * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
49 * - 1710 custom development board using alternate pin group
50 * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
53 #define INT_USB_IRQ_GEN IH2_BASE + 20
54 #define INT_USB_IRQ_NISO IH2_BASE + 30
55 #define INT_USB_IRQ_ISO IH2_BASE + 29
56 #define INT_USB_IRQ_HGEN INT_USB_HHC_1
57 #define INT_USB_IRQ_OTG IH2_BASE + 8
59 #ifdef CONFIG_ARCH_OMAP_OTG
62 omap_otg_init(struct omap_usb_config
*config
)
67 /* NOTE: no bus or clock setup (yet?) */
69 syscon
= omap_readl(OTG_SYSCON_1
) & 0xffff;
70 if (!(syscon
& OTG_RESET_DONE
))
71 pr_debug("USB resets not complete?\n");
73 //omap_writew(0, OTG_IRQ_EN);
75 /* pin muxing and transceiver pinouts */
76 if (config
->pins
[0] > 2) /* alt pingroup 2 */
78 syscon
|= config
->usb0_init(config
->pins
[0], is_usb0_device(config
));
79 syscon
|= config
->usb1_init(config
->pins
[1]);
80 syscon
|= config
->usb2_init(config
->pins
[2], alt_pingroup
);
81 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1
));
82 omap_writel(syscon
, OTG_SYSCON_1
);
84 syscon
= config
->hmc_mode
;
85 syscon
|= USBX_SYNCHRO
| (4 << 16) /* B_ASE0_BRST */;
90 if (cpu_class_is_omap1())
91 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
92 omap_readl(USB_TRANSCEIVER_CTRL
));
93 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2
));
94 omap_writel(syscon
, OTG_SYSCON_2
);
96 printk("USB: hmc %d", config
->hmc_mode
);
98 printk(", usb2 alt %d wires", config
->pins
[2]);
99 else if (config
->pins
[0])
100 printk(", usb0 %d wires%s", config
->pins
[0],
101 is_usb0_device(config
) ? " (dev)" : "");
103 printk(", usb1 %d wires", config
->pins
[1]);
104 if (!alt_pingroup
&& config
->pins
[2])
105 printk(", usb2 %d wires", config
->pins
[2]);
107 printk(", Mini-AB on usb%d", config
->otg
- 1);
110 if (cpu_class_is_omap1()) {
113 /* leave USB clocks/controllers off until needed */
114 w
= omap_readw(ULPD_SOFT_REQ
);
115 w
&= ~SOFT_USB_CLK_REQ
;
116 omap_writew(w
, ULPD_SOFT_REQ
);
118 w
= omap_readw(ULPD_CLOCK_CTRL
);
120 w
|= DIS_USB_PVCI_CLK
;
121 omap_writew(w
, ULPD_CLOCK_CTRL
);
123 syscon
= omap_readl(OTG_SYSCON_1
);
124 syscon
|= HST_IDLE_EN
|DEV_IDLE_EN
|OTG_IDLE_EN
;
126 #if IS_ENABLED(CONFIG_USB_OMAP)
127 if (config
->otg
|| config
->register_dev
) {
128 struct platform_device
*udc_device
= config
->udc_device
;
131 syscon
&= ~DEV_IDLE_EN
;
132 udc_device
->dev
.platform_data
= config
;
133 status
= platform_device_register(udc_device
);
135 pr_debug("can't register UDC device, %d\n", status
);
139 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
140 if (config
->otg
|| config
->register_host
) {
141 struct platform_device
*ohci_device
= config
->ohci_device
;
144 syscon
&= ~HST_IDLE_EN
;
145 ohci_device
->dev
.platform_data
= config
;
146 status
= platform_device_register(ohci_device
);
148 pr_debug("can't register OHCI device, %d\n", status
);
152 #ifdef CONFIG_USB_OTG
154 struct platform_device
*otg_device
= config
->otg_device
;
157 syscon
&= ~OTG_IDLE_EN
;
158 otg_device
->dev
.platform_data
= config
;
159 status
= platform_device_register(otg_device
);
161 pr_debug("can't register OTG device, %d\n", status
);
164 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1
));
165 omap_writel(syscon
, OTG_SYSCON_1
);
169 void omap_otg_init(struct omap_usb_config
*config
) {}
172 #if IS_ENABLED(CONFIG_USB_OMAP)
174 static struct resource udc_resources
[] = {
175 /* order is significant! */
178 .end
= UDC_BASE
+ 0xff,
179 .flags
= IORESOURCE_MEM
,
180 }, { /* general IRQ */
181 .start
= INT_USB_IRQ_GEN
,
182 .flags
= IORESOURCE_IRQ
,
184 .start
= INT_USB_IRQ_NISO
,
185 .flags
= IORESOURCE_IRQ
,
187 .start
= INT_USB_IRQ_ISO
,
188 .flags
= IORESOURCE_IRQ
,
192 static u64 udc_dmamask
= ~(u32
)0;
194 static struct platform_device udc_device
= {
198 .dma_mask
= &udc_dmamask
,
199 .coherent_dma_mask
= 0xffffffff,
201 .num_resources
= ARRAY_SIZE(udc_resources
),
202 .resource
= udc_resources
,
205 static inline void udc_device_init(struct omap_usb_config
*pdata
)
207 /* IRQ numbers for omap7xx */
208 if(cpu_is_omap7xx()) {
209 udc_resources
[1].start
= INT_7XX_USB_GENI
;
210 udc_resources
[2].start
= INT_7XX_USB_NON_ISO
;
211 udc_resources
[3].start
= INT_7XX_USB_ISO
;
213 pdata
->udc_device
= &udc_device
;
218 static inline void udc_device_init(struct omap_usb_config
*pdata
)
224 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
226 /* The dmamask must be set for OHCI to work */
227 static u64 ohci_dmamask
= ~(u32
)0;
229 static struct resource ohci_resources
[] = {
231 .start
= OMAP_OHCI_BASE
,
232 .end
= OMAP_OHCI_BASE
+ 0xff,
233 .flags
= IORESOURCE_MEM
,
236 .start
= INT_USB_IRQ_HGEN
,
237 .flags
= IORESOURCE_IRQ
,
241 static struct platform_device ohci_device
= {
245 .dma_mask
= &ohci_dmamask
,
246 .coherent_dma_mask
= 0xffffffff,
248 .num_resources
= ARRAY_SIZE(ohci_resources
),
249 .resource
= ohci_resources
,
252 static inline void ohci_device_init(struct omap_usb_config
*pdata
)
254 if (cpu_is_omap7xx())
255 ohci_resources
[1].start
= INT_7XX_USB_HHC_1
;
256 pdata
->ohci_device
= &ohci_device
;
257 pdata
->ocpi_enable
= &ocpi_enable
;
262 static inline void ohci_device_init(struct omap_usb_config
*pdata
)
268 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
270 static struct resource otg_resources
[] = {
271 /* order is significant! */
274 .end
= OTG_BASE
+ 0xff,
275 .flags
= IORESOURCE_MEM
,
277 .start
= INT_USB_IRQ_OTG
,
278 .flags
= IORESOURCE_IRQ
,
282 static struct platform_device otg_device
= {
285 .num_resources
= ARRAY_SIZE(otg_resources
),
286 .resource
= otg_resources
,
289 static inline void otg_device_init(struct omap_usb_config
*pdata
)
291 if (cpu_is_omap7xx())
292 otg_resources
[1].start
= INT_7XX_USB_OTG
;
293 pdata
->otg_device
= &otg_device
;
298 static inline void otg_device_init(struct omap_usb_config
*pdata
)
304 static u32 __init
omap1_usb0_init(unsigned nwires
, unsigned is_device
)
309 if (!cpu_is_omap15xx()) {
313 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
315 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
321 if (cpu_is_omap7xx()) {
322 omap_cfg_reg(AA17_7XX_USB_DM
);
323 omap_cfg_reg(W16_7XX_USB_PU_EN
);
324 omap_cfg_reg(W17_7XX_USB_VBUSI
);
325 omap_cfg_reg(W18_7XX_USB_DMCK_OUT
);
326 omap_cfg_reg(W19_7XX_USB_DCRST
);
328 omap_cfg_reg(W4_USB_PUEN
);
334 // omap_cfg_reg(P9_USB_DP);
335 // omap_cfg_reg(R8_USB_DM);
337 if (cpu_is_omap15xx()) {
338 /* This works on 1510-Innovator */
343 * - peripheral should configure VBUS detection!
344 * - only peripherals may use the internal D+/D- pulldowns
345 * - OTG support on this port not yet written
348 /* Don't do this for omap7xx -- it causes USB to not work correctly */
349 if (!cpu_is_omap7xx()) {
350 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
354 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
360 /* alternate pin config, external transceiver */
361 if (cpu_is_omap15xx()) {
362 printk(KERN_ERR
"no usb0 alt pin config on 15xx\n");
366 omap_cfg_reg(V6_USB0_TXD
);
367 omap_cfg_reg(W9_USB0_TXEN
);
368 omap_cfg_reg(W5_USB0_SE0
);
370 omap_cfg_reg(Y5_USB0_RCV
);
372 /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
373 * may be able to use I2C requests to set those bits along
374 * with VBUS switching and overcurrent detection.
380 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
381 l
&= ~CONF_USB2_UNI_R
;
382 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
397 omap_cfg_reg(AA9_USB0_VP
);
398 omap_cfg_reg(R9_USB0_VM
);
399 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
400 l
|= CONF_USB2_UNI_R
;
401 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
405 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
409 return syscon1
<< 16;
412 static u32 __init
omap1_usb1_init(unsigned nwires
)
416 if (!cpu_is_omap15xx() && nwires
!= 6) {
419 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
420 l
&= ~CONF_USB1_UNI_R
;
421 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
426 /* external transceiver */
427 omap_cfg_reg(USB1_TXD
);
428 omap_cfg_reg(USB1_TXEN
);
430 omap_cfg_reg(USB1_RCV
);
432 if (cpu_is_omap15xx()) {
433 omap_cfg_reg(USB1_SEO
);
434 omap_cfg_reg(USB1_SPEED
);
436 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
437 omap_cfg_reg(W13_1610_USB1_SE0
);
438 omap_cfg_reg(R13_1610_USB1_SPEED
);
440 } else if (cpu_is_omap1710()) {
441 omap_cfg_reg(R13_1710_USB1_SE0
);
444 pr_debug("usb%d cpu unrecognized\n", 1);
459 omap_cfg_reg(USB1_VP
);
460 omap_cfg_reg(USB1_VM
);
461 if (!cpu_is_omap15xx()) {
464 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
465 l
|= CONF_USB1_UNI_R
;
466 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
471 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
475 return syscon1
<< 20;
478 static u32 __init
omap1_usb2_init(unsigned nwires
, unsigned alt_pingroup
)
482 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
483 if (alt_pingroup
|| nwires
== 0)
486 if (!cpu_is_omap15xx() && nwires
!= 6) {
489 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
490 l
&= ~CONF_USB2_UNI_R
;
491 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
494 /* external transceiver */
495 if (cpu_is_omap15xx()) {
496 omap_cfg_reg(USB2_TXD
);
497 omap_cfg_reg(USB2_TXEN
);
498 omap_cfg_reg(USB2_SEO
);
500 omap_cfg_reg(USB2_RCV
);
501 /* there is no USB2_SPEED */
502 } else if (cpu_is_omap16xx()) {
503 omap_cfg_reg(V6_USB2_TXD
);
504 omap_cfg_reg(W9_USB2_TXEN
);
505 omap_cfg_reg(W5_USB2_SE0
);
507 omap_cfg_reg(Y5_USB2_RCV
);
508 // FIXME omap_cfg_reg(USB2_SPEED);
510 pr_debug("usb%d cpu unrecognized\n", 1);
514 // omap_cfg_reg(USB2_SUSP);
529 if (cpu_is_omap15xx()) {
530 omap_cfg_reg(USB2_VP
);
531 omap_cfg_reg(USB2_VM
);
535 omap_cfg_reg(AA9_USB2_VP
);
536 omap_cfg_reg(R9_USB2_VM
);
537 l
= omap_readl(USB_TRANSCEIVER_CTRL
);
538 l
|= CONF_USB2_UNI_R
;
539 omap_writel(l
, USB_TRANSCEIVER_CTRL
);
544 printk(KERN_ERR
"illegal usb%d %d-wire transceiver\n",
548 return syscon1
<< 24;
551 #ifdef CONFIG_ARCH_OMAP15XX
554 #define DPLL_IOB (1 << 13)
555 #define DPLL_PLL_ENABLE (1 << 4)
556 #define DPLL_LOCK (1 << 0)
559 #define APLL_NDPLL_SWITCH (1 << 0)
561 static void __init
omap_1510_usb_init(struct omap_usb_config
*config
)
566 config
->usb0_init(config
->pins
[0], is_usb0_device(config
));
567 config
->usb1_init(config
->pins
[1]);
568 config
->usb2_init(config
->pins
[2], 0);
570 val
= omap_readl(MOD_CONF_CTRL_0
) & ~(0x3f << 1);
571 val
|= (config
->hmc_mode
<< 1);
572 omap_writel(val
, MOD_CONF_CTRL_0
);
574 printk("USB: hmc %d", config
->hmc_mode
);
576 printk(", usb0 %d wires%s", config
->pins
[0],
577 is_usb0_device(config
) ? " (dev)" : "");
579 printk(", usb1 %d wires", config
->pins
[1]);
581 printk(", usb2 %d wires", config
->pins
[2]);
584 /* use DPLL for 48 MHz function clock */
585 pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL
),
586 omap_readw(ULPD_DPLL_CTRL
), omap_readw(ULPD_SOFT_REQ
));
588 w
= omap_readw(ULPD_APLL_CTRL
);
589 w
&= ~APLL_NDPLL_SWITCH
;
590 omap_writew(w
, ULPD_APLL_CTRL
);
592 w
= omap_readw(ULPD_DPLL_CTRL
);
593 w
|= DPLL_IOB
| DPLL_PLL_ENABLE
;
594 omap_writew(w
, ULPD_DPLL_CTRL
);
596 w
= omap_readw(ULPD_SOFT_REQ
);
597 w
|= SOFT_UDC_REQ
| SOFT_DPLL_REQ
;
598 omap_writew(w
, ULPD_SOFT_REQ
);
600 while (!(omap_readw(ULPD_DPLL_CTRL
) & DPLL_LOCK
))
603 #if IS_ENABLED(CONFIG_USB_OMAP)
604 if (config
->register_dev
) {
607 udc_device
.dev
.platform_data
= config
;
608 status
= platform_device_register(&udc_device
);
610 pr_debug("can't register UDC device, %d\n", status
);
611 /* udc driver gates 48MHz by D+ pullup */
615 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
616 if (config
->register_host
) {
619 ohci_device
.dev
.platform_data
= config
;
620 status
= platform_device_register(&ohci_device
);
622 pr_debug("can't register OHCI device, %d\n", status
);
623 /* hcd explicitly gates 48MHz */
629 static inline void omap_1510_usb_init(struct omap_usb_config
*config
) {}
632 void __init
omap1_usb_init(struct omap_usb_config
*_pdata
)
634 struct omap_usb_config
*pdata
;
636 pdata
= kmemdup(_pdata
, sizeof(*pdata
), GFP_KERNEL
);
640 pdata
->usb0_init
= omap1_usb0_init
;
641 pdata
->usb1_init
= omap1_usb1_init
;
642 pdata
->usb2_init
= omap1_usb2_init
;
643 udc_device_init(pdata
);
644 ohci_device_init(pdata
);
645 otg_device_init(pdata
);
647 if (cpu_is_omap7xx() || cpu_is_omap16xx())
648 omap_otg_init(pdata
);
649 else if (cpu_is_omap15xx())
650 omap_1510_usb_init(pdata
);
652 printk(KERN_ERR
"USB: No init for your chip yet\n");