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1da177e4 | 1 | /* |
7a857620 | 2 | * Intel PXA25x on-chip full speed USB device controller |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix | |
5 | * Copyright (C) 2003 David Brownell | |
6 | * | |
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 as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
7a857620 PZ |
23 | #ifndef __LINUX_USB_GADGET_PXA25X_H |
24 | #define __LINUX_USB_GADGET_PXA25X_H | |
1da177e4 LT |
25 | |
26 | #include <linux/types.h> | |
27 | ||
28 | /*-------------------------------------------------------------------------*/ | |
29 | ||
7a857620 | 30 | /* pxa25x has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ |
1da177e4 LT |
31 | #define UFNRH_SIR (1 << 7) /* SOF interrupt request */ |
32 | #define UFNRH_SIM (1 << 6) /* SOF interrupt mask */ | |
33 | #define UFNRH_IPE14 (1 << 5) /* ISO packet error, ep14 */ | |
34 | #define UFNRH_IPE9 (1 << 4) /* ISO packet error, ep9 */ | |
35 | #define UFNRH_IPE4 (1 << 3) /* ISO packet error, ep4 */ | |
36 | ||
37 | /* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */ | |
38 | #define UDCCFR UDC_RES2 /* UDC Control Function Register */ | |
39 | #define UDCCFR_AREN (1 << 7) /* ACK response enable (now) */ | |
40 | #define UDCCFR_ACM (1 << 2) /* ACK control mode (wait for AREN) */ | |
41 | ||
42 | /* latest pxa255 errata define new "must be one" bits in UDCCFR */ | |
43 | #define UDCCFR_MB1 (0xff & ~(UDCCFR_AREN|UDCCFR_ACM)) | |
44 | ||
45 | /*-------------------------------------------------------------------------*/ | |
46 | ||
7a857620 | 47 | struct pxa25x_udc; |
1da177e4 | 48 | |
7a857620 | 49 | struct pxa25x_ep { |
1da177e4 | 50 | struct usb_ep ep; |
7a857620 | 51 | struct pxa25x_udc *dev; |
1da177e4 LT |
52 | |
53 | const struct usb_endpoint_descriptor *desc; | |
54 | struct list_head queue; | |
55 | unsigned long pio_irqs; | |
1da177e4 LT |
56 | |
57 | unsigned short fifo_size; | |
58 | u8 bEndpointAddress; | |
59 | u8 bmAttributes; | |
60 | ||
61 | unsigned stopped : 1; | |
62 | unsigned dma_fixup : 1; | |
ad8c623f | 63 | |
1da177e4 LT |
64 | /* UDCCS = UDC Control/Status for this EP |
65 | * UBCR = UDC Byte Count Remaining (contents of OUT fifo) | |
66 | * UDDR = UDC Endpoint Data Register (the fifo) | |
67 | * DRCM = DMA Request Channel Map | |
68 | */ | |
63a4b52c IC |
69 | volatile u32 *reg_udccs; |
70 | volatile u32 *reg_ubcr; | |
71 | volatile u32 *reg_uddr; | |
1da177e4 LT |
72 | }; |
73 | ||
7a857620 | 74 | struct pxa25x_request { |
1da177e4 LT |
75 | struct usb_request req; |
76 | struct list_head queue; | |
77 | }; | |
78 | ||
ad8c623f | 79 | enum ep0_state { |
1da177e4 LT |
80 | EP0_IDLE, |
81 | EP0_IN_DATA_PHASE, | |
82 | EP0_OUT_DATA_PHASE, | |
83 | EP0_END_XFER, | |
84 | EP0_STALL, | |
85 | }; | |
86 | ||
87 | #define EP0_FIFO_SIZE ((unsigned)16) | |
88 | #define BULK_FIFO_SIZE ((unsigned)64) | |
89 | #define ISO_FIFO_SIZE ((unsigned)256) | |
90 | #define INT_FIFO_SIZE ((unsigned)8) | |
91 | ||
92 | struct udc_stats { | |
93 | struct ep0stats { | |
94 | unsigned long ops; | |
95 | unsigned long bytes; | |
96 | } read, write; | |
97 | unsigned long irqs; | |
98 | }; | |
99 | ||
7a857620 | 100 | #ifdef CONFIG_USB_PXA25X_SMALL |
1da177e4 | 101 | /* when memory's tight, SMALL config saves code+data. */ |
1da177e4 LT |
102 | #define PXA_UDC_NUM_ENDPOINTS 3 |
103 | #endif | |
104 | ||
105 | #ifndef PXA_UDC_NUM_ENDPOINTS | |
106 | #define PXA_UDC_NUM_ENDPOINTS 16 | |
107 | #endif | |
108 | ||
7a857620 | 109 | struct pxa25x_udc { |
1da177e4 LT |
110 | struct usb_gadget gadget; |
111 | struct usb_gadget_driver *driver; | |
112 | ||
113 | enum ep0_state ep0state; | |
114 | struct udc_stats stats; | |
115 | unsigned got_irq : 1, | |
116 | vbus : 1, | |
117 | pullup : 1, | |
118 | has_cfr : 1, | |
119 | req_pending : 1, | |
120 | req_std : 1, | |
64cc2dd9 DB |
121 | req_config : 1, |
122 | suspended : 1, | |
123 | active : 1; | |
1da177e4 LT |
124 | |
125 | #define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200)) | |
126 | struct timer_list timer; | |
127 | ||
128 | struct device *dev; | |
6549e6c9 | 129 | struct clk *clk; |
1da177e4 LT |
130 | struct pxa2xx_udc_mach_info *mach; |
131 | u64 dma_mask; | |
7a857620 | 132 | struct pxa25x_ep ep [PXA_UDC_NUM_ENDPOINTS]; |
040fa1b9 DB |
133 | |
134 | #ifdef CONFIG_USB_GADGET_DEBUG_FS | |
135 | struct dentry *debugfs_udc; | |
136 | #endif | |
1da177e4 LT |
137 | }; |
138 | ||
139 | /*-------------------------------------------------------------------------*/ | |
140 | ||
141 | #ifdef CONFIG_ARCH_LUBBOCK | |
a09e64fb | 142 | #include <mach/lubbock.h> |
1da177e4 | 143 | /* lubbock can also report usb connect/disconnect irqs */ |
1da177e4 LT |
144 | #endif |
145 | ||
7a857620 | 146 | static struct pxa25x_udc *the_controller; |
1da177e4 | 147 | |
1da177e4 LT |
148 | /*-------------------------------------------------------------------------*/ |
149 | ||
150 | /* | |
151 | * Debugging support vanishes in non-debug builds. DBG_NORMAL should be | |
152 | * mostly silent during normal use/testing, with no timing side-effects. | |
153 | */ | |
154 | #define DBG_NORMAL 1 /* error paths, device state transitions */ | |
155 | #define DBG_VERBOSE 2 /* add some success path trace info */ | |
156 | #define DBG_NOISY 3 /* ... even more: request level */ | |
157 | #define DBG_VERY_NOISY 4 /* ... even more: packet level */ | |
158 | ||
00274921 DB |
159 | #define DMSG(stuff...) pr_debug("udc: " stuff) |
160 | ||
1da177e4 LT |
161 | #ifdef DEBUG |
162 | ||
040fa1b9 DB |
163 | static int is_vbus_present(void); |
164 | ||
1da177e4 LT |
165 | static const char *state_name[] = { |
166 | "EP0_IDLE", | |
167 | "EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE", | |
168 | "EP0_END_XFER", "EP0_STALL" | |
169 | }; | |
170 | ||
040fa1b9 | 171 | #ifdef VERBOSE_DEBUG |
1da177e4 LT |
172 | # define UDC_DEBUG DBG_VERBOSE |
173 | #else | |
174 | # define UDC_DEBUG DBG_NORMAL | |
175 | #endif | |
176 | ||
8234509c | 177 | static void __maybe_unused |
1da177e4 LT |
178 | dump_udccr(const char *label) |
179 | { | |
180 | u32 udccr = UDCCR; | |
181 | DMSG("%s %02X =%s%s%s%s%s%s%s%s\n", | |
182 | label, udccr, | |
183 | (udccr & UDCCR_REM) ? " rem" : "", | |
184 | (udccr & UDCCR_RSTIR) ? " rstir" : "", | |
185 | (udccr & UDCCR_SRM) ? " srm" : "", | |
186 | (udccr & UDCCR_SUSIR) ? " susir" : "", | |
187 | (udccr & UDCCR_RESIR) ? " resir" : "", | |
188 | (udccr & UDCCR_RSM) ? " rsm" : "", | |
189 | (udccr & UDCCR_UDA) ? " uda" : "", | |
190 | (udccr & UDCCR_UDE) ? " ude" : ""); | |
191 | } | |
192 | ||
8234509c | 193 | static void __maybe_unused |
1da177e4 LT |
194 | dump_udccs0(const char *label) |
195 | { | |
196 | u32 udccs0 = UDCCS0; | |
197 | ||
198 | DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n", | |
199 | label, state_name[the_controller->ep0state], udccs0, | |
200 | (udccs0 & UDCCS0_SA) ? " sa" : "", | |
201 | (udccs0 & UDCCS0_RNE) ? " rne" : "", | |
202 | (udccs0 & UDCCS0_FST) ? " fst" : "", | |
203 | (udccs0 & UDCCS0_SST) ? " sst" : "", | |
204 | (udccs0 & UDCCS0_DRWF) ? " dwrf" : "", | |
205 | (udccs0 & UDCCS0_FTF) ? " ftf" : "", | |
206 | (udccs0 & UDCCS0_IPR) ? " ipr" : "", | |
207 | (udccs0 & UDCCS0_OPR) ? " opr" : ""); | |
208 | } | |
209 | ||
8234509c | 210 | static void __maybe_unused |
7a857620 | 211 | dump_state(struct pxa25x_udc *dev) |
1da177e4 LT |
212 | { |
213 | u32 tmp; | |
214 | unsigned i; | |
215 | ||
216 | DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n", | |
040fa1b9 | 217 | is_vbus_present() ? "host " : "disconnected", |
1da177e4 LT |
218 | state_name[dev->ep0state], |
219 | UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL); | |
220 | dump_udccr("udccr"); | |
221 | if (dev->has_cfr) { | |
222 | tmp = UDCCFR; | |
223 | DMSG("udccfr %02X =%s%s\n", tmp, | |
224 | (tmp & UDCCFR_AREN) ? " aren" : "", | |
225 | (tmp & UDCCFR_ACM) ? " acm" : ""); | |
226 | } | |
227 | ||
228 | if (!dev->driver) { | |
229 | DMSG("no gadget driver bound\n"); | |
230 | return; | |
231 | } else | |
232 | DMSG("ep0 driver '%s'\n", dev->driver->driver.name); | |
233 | ||
040fa1b9 | 234 | if (!is_vbus_present()) |
1da177e4 LT |
235 | return; |
236 | ||
237 | dump_udccs0 ("udccs0"); | |
238 | DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n", | |
239 | dev->stats.write.bytes, dev->stats.write.ops, | |
240 | dev->stats.read.bytes, dev->stats.read.ops); | |
241 | ||
242 | for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) { | |
040fa1b9 | 243 | if (dev->ep [i].desc == NULL) |
1da177e4 LT |
244 | continue; |
245 | DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs); | |
246 | } | |
247 | } | |
248 | ||
249 | #else | |
250 | ||
1da177e4 LT |
251 | #define dump_udccr(x) do{}while(0) |
252 | #define dump_udccs0(x) do{}while(0) | |
253 | #define dump_state(x) do{}while(0) | |
254 | ||
255 | #define UDC_DEBUG ((unsigned)0) | |
256 | ||
257 | #endif | |
258 | ||
259 | #define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0) | |
260 | ||
00274921 | 261 | #define ERR(stuff...) pr_err("udc: " stuff) |
b6c63937 | 262 | #define WARNING(stuff...) pr_warning("udc: " stuff) |
00274921 | 263 | #define INFO(stuff...) pr_info("udc: " stuff) |
1da177e4 LT |
264 | |
265 | ||
7a857620 | 266 | #endif /* __LINUX_USB_GADGET_PXA25X_H */ |