1 /*
2 * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
3 *
4 * Copyright (C) 2004 Texas Instruments, Inc.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/types.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/platform_device.h>
27 #include <linux/clk.h>
28 #include <linux/err.h>
29
30 #include <asm/irq.h>
31
32 #include <plat/usb.h>
33 #include <plat/board.h>
34
35 #include "control.h"
36 #include "mux.h"
37
38 #define INT_USB_IRQ_GEN INT_24XX_USB_IRQ_GEN
39 #define INT_USB_IRQ_NISO INT_24XX_USB_IRQ_NISO
40 #define INT_USB_IRQ_ISO INT_24XX_USB_IRQ_ISO
41 #define INT_USB_IRQ_HGEN INT_24XX_USB_IRQ_HGEN
42 #define INT_USB_IRQ_OTG INT_24XX_USB_IRQ_OTG
43
44 #if defined(CONFIG_ARCH_OMAP2)
45
46 #ifdef CONFIG_USB_GADGET_OMAP
47
48 static struct resource udc_resources[] = {
49 /* order is significant! */
50 { /* registers */
51 .start = UDC_BASE,
52 .end = UDC_BASE + 0xff,
53 .flags = IORESOURCE_MEM,
54 }, { /* general IRQ */
55 .start = INT_USB_IRQ_GEN,
56 .flags = IORESOURCE_IRQ,
57 }, { /* PIO IRQ */
58 .start = INT_USB_IRQ_NISO,
59 .flags = IORESOURCE_IRQ,
60 }, { /* SOF IRQ */
61 .start = INT_USB_IRQ_ISO,
62 .flags = IORESOURCE_IRQ,
63 },
64 };
65
66 static u64 udc_dmamask = ~(u32)0;
67
68 static struct platform_device udc_device = {
69 .name = "omap_udc",
70 .id = -1,
71 .dev = {
72 .dma_mask = &udc_dmamask,
73 .coherent_dma_mask = 0xffffffff,
74 },
75 .num_resources = ARRAY_SIZE(udc_resources),
76 .resource = udc_resources,
77 };
78
udc_device_init(struct omap_usb_config * pdata)79 static inline void udc_device_init(struct omap_usb_config *pdata)
80 {
81 pdata->udc_device = &udc_device;
82 }
83
84 #else
85
udc_device_init(struct omap_usb_config * pdata)86 static inline void udc_device_init(struct omap_usb_config *pdata)
87 {
88 }
89
90 #endif
91
92 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
93
94 /* The dmamask must be set for OHCI to work */
95 static u64 ohci_dmamask = ~(u32)0;
96
97 static struct resource ohci_resources[] = {
98 {
99 .start = OMAP_OHCI_BASE,
100 .end = OMAP_OHCI_BASE + 0xff,
101 .flags = IORESOURCE_MEM,
102 },
103 {
104 .start = INT_USB_IRQ_HGEN,
105 .flags = IORESOURCE_IRQ,
106 },
107 };
108
109 static struct platform_device ohci_device = {
110 .name = "ohci",
111 .id = -1,
112 .dev = {
113 .dma_mask = &ohci_dmamask,
114 .coherent_dma_mask = 0xffffffff,
115 },
116 .num_resources = ARRAY_SIZE(ohci_resources),
117 .resource = ohci_resources,
118 };
119
ohci_device_init(struct omap_usb_config * pdata)120 static inline void ohci_device_init(struct omap_usb_config *pdata)
121 {
122 pdata->ohci_device = &ohci_device;
123 }
124
125 #else
126
ohci_device_init(struct omap_usb_config * pdata)127 static inline void ohci_device_init(struct omap_usb_config *pdata)
128 {
129 }
130
131 #endif
132
133 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
134
135 static struct resource otg_resources[] = {
136 /* order is significant! */
137 {
138 .start = OTG_BASE,
139 .end = OTG_BASE + 0xff,
140 .flags = IORESOURCE_MEM,
141 }, {
142 .start = INT_USB_IRQ_OTG,
143 .flags = IORESOURCE_IRQ,
144 },
145 };
146
147 static struct platform_device otg_device = {
148 .name = "omap_otg",
149 .id = -1,
150 .num_resources = ARRAY_SIZE(otg_resources),
151 .resource = otg_resources,
152 };
153
otg_device_init(struct omap_usb_config * pdata)154 static inline void otg_device_init(struct omap_usb_config *pdata)
155 {
156 pdata->otg_device = &otg_device;
157 }
158
159 #else
160
otg_device_init(struct omap_usb_config * pdata)161 static inline void otg_device_init(struct omap_usb_config *pdata)
162 {
163 }
164
165 #endif
166
omap2_usb_devconf_clear(u8 port,u32 mask)167 static void omap2_usb_devconf_clear(u8 port, u32 mask)
168 {
169 u32 r;
170
171 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
172 r &= ~USBTXWRMODEI(port, mask);
173 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
174 }
175
omap2_usb_devconf_set(u8 port,u32 mask)176 static void omap2_usb_devconf_set(u8 port, u32 mask)
177 {
178 u32 r;
179
180 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
181 r |= USBTXWRMODEI(port, mask);
182 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
183 }
184
omap2_usb2_disable_5pinbitll(void)185 static void omap2_usb2_disable_5pinbitll(void)
186 {
187 u32 r;
188
189 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
190 r &= ~(USBTXWRMODEI(2, USB_BIDIR_TLL) | USBT2TLL5PI);
191 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
192 }
193
omap2_usb2_enable_5pinunitll(void)194 static void omap2_usb2_enable_5pinunitll(void)
195 {
196 u32 r;
197
198 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
199 r |= USBTXWRMODEI(2, USB_UNIDIR_TLL) | USBT2TLL5PI;
200 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
201 }
202
omap2_usb0_init(unsigned nwires,unsigned is_device)203 static u32 __init omap2_usb0_init(unsigned nwires, unsigned is_device)
204 {
205 u32 syscon1 = 0;
206
207 omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
208
209 if (nwires == 0)
210 return 0;
211
212 if (is_device)
213 omap_mux_init_signal("usb0_puen", 0);
214
215 omap_mux_init_signal("usb0_dat", 0);
216 omap_mux_init_signal("usb0_txen", 0);
217 omap_mux_init_signal("usb0_se0", 0);
218 if (nwires != 3)
219 omap_mux_init_signal("usb0_rcv", 0);
220
221 switch (nwires) {
222 case 3:
223 syscon1 = 2;
224 omap2_usb_devconf_set(0, USB_BIDIR);
225 break;
226 case 4:
227 syscon1 = 1;
228 omap2_usb_devconf_set(0, USB_BIDIR);
229 break;
230 case 6:
231 syscon1 = 3;
232 omap_mux_init_signal("usb0_vp", 0);
233 omap_mux_init_signal("usb0_vm", 0);
234 omap2_usb_devconf_set(0, USB_UNIDIR);
235 break;
236 default:
237 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
238 0, nwires);
239 }
240
241 return syscon1 << 16;
242 }
243
omap2_usb1_init(unsigned nwires)244 static u32 __init omap2_usb1_init(unsigned nwires)
245 {
246 u32 syscon1 = 0;
247
248 omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
249
250 if (nwires == 0)
251 return 0;
252
253 /* NOTE: board-specific code must set up pin muxing for usb1,
254 * since each signal could come out on either of two balls.
255 */
256
257 switch (nwires) {
258 case 2:
259 /* NOTE: board-specific code must override this setting if
260 * this TLL link is not using DP/DM
261 */
262 syscon1 = 1;
263 omap2_usb_devconf_set(1, USB_BIDIR_TLL);
264 break;
265 case 3:
266 syscon1 = 2;
267 omap2_usb_devconf_set(1, USB_BIDIR);
268 break;
269 case 4:
270 syscon1 = 1;
271 omap2_usb_devconf_set(1, USB_BIDIR);
272 break;
273 case 6:
274 default:
275 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
276 1, nwires);
277 }
278
279 return syscon1 << 20;
280 }
281
omap2_usb2_init(unsigned nwires,unsigned alt_pingroup)282 static u32 __init omap2_usb2_init(unsigned nwires, unsigned alt_pingroup)
283 {
284 u32 syscon1 = 0;
285
286 omap2_usb2_disable_5pinbitll();
287 alt_pingroup = 0;
288
289 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
290 if (alt_pingroup || nwires == 0)
291 return 0;
292
293 omap_mux_init_signal("usb2_dat", 0);
294 omap_mux_init_signal("usb2_se0", 0);
295 if (nwires > 2)
296 omap_mux_init_signal("usb2_txen", 0);
297 if (nwires > 3)
298 omap_mux_init_signal("usb2_rcv", 0);
299
300 switch (nwires) {
301 case 2:
302 /* NOTE: board-specific code must override this setting if
303 * this TLL link is not using DP/DM
304 */
305 syscon1 = 1;
306 omap2_usb_devconf_set(2, USB_BIDIR_TLL);
307 break;
308 case 3:
309 syscon1 = 2;
310 omap2_usb_devconf_set(2, USB_BIDIR);
311 break;
312 case 4:
313 syscon1 = 1;
314 omap2_usb_devconf_set(2, USB_BIDIR);
315 break;
316 case 5:
317 /* NOTE: board-specific code must mux this setting depending
318 * on TLL link using DP/DM. Something must also
319 * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
320 * 2420: hdq_sio.usb2_tllse0 or vlynq_rx0.usb2_tllse0
321 * 2430: hdq_sio.usb2_tllse0 or sdmmc2_dat0.usb2_tllse0
322 */
323
324 syscon1 = 3;
325 omap2_usb2_enable_5pinunitll();
326 break;
327 case 6:
328 default:
329 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
330 2, nwires);
331 }
332
333 return syscon1 << 24;
334 }
335
omap2_usbfs_init(struct omap_usb_config * pdata)336 void __init omap2_usbfs_init(struct omap_usb_config *pdata)
337 {
338 struct clk *ick;
339
340 if (!cpu_is_omap24xx())
341 return;
342
343 ick = clk_get(NULL, "usb_l4_ick");
344 if (IS_ERR(ick))
345 return;
346
347 clk_enable(ick);
348 pdata->usb0_init = omap2_usb0_init;
349 pdata->usb1_init = omap2_usb1_init;
350 pdata->usb2_init = omap2_usb2_init;
351 udc_device_init(pdata);
352 ohci_device_init(pdata);
353 otg_device_init(pdata);
354 omap_otg_init(pdata);
355 clk_disable(ick);
356 clk_put(ick);
357 }
358
359 #endif
360