Greg Kroah-Hartman | 5fd54ac | 2017-11-03 11:28:30 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2 | /* |
| 3 | * at91_udc -- driver for at91-series USB peripheral controller |
| 4 | * |
| 5 | * Copyright (C) 2004 by Thomas Rathbone |
| 6 | * Copyright (C) 2005 by HP Labs |
| 7 | * Copyright (C) 2005 by David Brownell |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 8 | */ |
| 9 | |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 10 | #undef VERBOSE_DEBUG |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 11 | #undef PACKET_TRACE |
| 12 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/ioport.h> |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 18 | #include <linux/slab.h> |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 19 | #include <linux/errno.h> |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 20 | #include <linux/list.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/proc_fs.h> |
Jean-Christophe PLAGNIOL-VILLARD | eed3936 | 2011-05-29 10:01:48 +0200 | [diff] [blame] | 23 | #include <linux/prefetch.h> |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 24 | #include <linux/clk.h> |
David Brownell | 5f84813 | 2006-12-16 15:34:53 -0800 | [diff] [blame] | 25 | #include <linux/usb/ch9.h> |
David Brownell | 9454a57 | 2007-10-04 18:05:17 -0700 | [diff] [blame] | 26 | #include <linux/usb/gadget.h> |
Jean-Christophe PLAGNIOL-VILLARD | d1494a3 | 2012-01-28 22:35:36 +0800 | [diff] [blame] | 27 | #include <linux/of.h> |
| 28 | #include <linux/of_gpio.h> |
Jean-Christophe PLAGNIOL-VILLARD | bcd2360 | 2012-10-30 05:12:23 +0800 | [diff] [blame] | 29 | #include <linux/platform_data/atmel.h> |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 30 | #include <linux/regmap.h> |
| 31 | #include <linux/mfd/syscon.h> |
| 32 | #include <linux/mfd/syscon/atmel-matrix.h> |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 33 | |
| 34 | #include "at91_udc.h" |
| 35 | |
| 36 | |
| 37 | /* |
| 38 | * This controller is simple and PIO-only. It's used in many AT91-series |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 39 | * full speed USB controllers, including the at91rm9200 (arm920T, with MMU), |
| 40 | * at91sam926x (arm926ejs, with MMU), and several no-mmu versions. |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 41 | * |
Masanari Iida | d755814 | 2012-08-22 18:40:21 +0900 | [diff] [blame] | 42 | * This driver expects the board has been wired with two GPIOs supporting |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 43 | * a VBUS sensing IRQ, and a D+ pullup. (They may be omitted, but the |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 44 | * testing hasn't covered such cases.) |
| 45 | * |
| 46 | * The pullup is most important (so it's integrated on sam926x parts). It |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 47 | * provides software control over whether the host enumerates the device. |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 48 | * |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 49 | * The VBUS sensing helps during enumeration, and allows both USB clocks |
| 50 | * (and the transceiver) to stay gated off until they're necessary, saving |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 51 | * power. During USB suspend, the 48 MHz clock is gated off in hardware; |
| 52 | * it may also be gated off by software during some Linux sleep states. |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 53 | */ |
| 54 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 55 | #define DRIVER_VERSION "3 May 2006" |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 56 | |
| 57 | static const char driver_name [] = "at91_udc"; |
Robert Baldyga | b9ed96d7 | 2015-07-31 16:00:21 +0200 | [diff] [blame] | 58 | |
| 59 | static const struct { |
| 60 | const char *name; |
| 61 | const struct usb_ep_caps caps; |
| 62 | } ep_info[] = { |
| 63 | #define EP_INFO(_name, _caps) \ |
| 64 | { \ |
| 65 | .name = _name, \ |
| 66 | .caps = _caps, \ |
| 67 | } |
| 68 | |
| 69 | EP_INFO("ep0", |
| 70 | USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), |
| 71 | EP_INFO("ep1", |
| 72 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), |
| 73 | EP_INFO("ep2", |
| 74 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), |
| 75 | EP_INFO("ep3-int", |
| 76 | USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_ALL)), |
| 77 | EP_INFO("ep4", |
| 78 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), |
| 79 | EP_INFO("ep5", |
| 80 | USB_EP_CAPS(USB_EP_CAPS_TYPE_ALL, USB_EP_CAPS_DIR_ALL)), |
| 81 | |
| 82 | #undef EP_INFO |
Boris Brezillon | a5514d14 | 2015-01-14 17:22:04 +0100 | [diff] [blame] | 83 | }; |
Robert Baldyga | b9ed96d7 | 2015-07-31 16:00:21 +0200 | [diff] [blame] | 84 | |
| 85 | #define ep0name ep_info[0].name |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 86 | |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 87 | #define VBUS_POLL_TIMEOUT msecs_to_jiffies(1000) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 88 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 89 | #define at91_udp_read(udc, reg) \ |
| 90 | __raw_readl((udc)->udp_baseaddr + (reg)) |
| 91 | #define at91_udp_write(udc, reg, val) \ |
| 92 | __raw_writel((val), (udc)->udp_baseaddr + (reg)) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 93 | |
| 94 | /*-------------------------------------------------------------------------*/ |
| 95 | |
| 96 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| 97 | |
| 98 | #include <linux/seq_file.h> |
| 99 | |
| 100 | static const char debug_filename[] = "driver/udc"; |
| 101 | |
| 102 | #define FOURBITS "%s%s%s%s" |
| 103 | #define EIGHTBITS FOURBITS FOURBITS |
| 104 | |
| 105 | static void proc_ep_show(struct seq_file *s, struct at91_ep *ep) |
| 106 | { |
| 107 | static char *types[] = { |
| 108 | "control", "out-iso", "out-bulk", "out-int", |
| 109 | "BOGUS", "in-iso", "in-bulk", "in-int"}; |
| 110 | |
| 111 | u32 csr; |
| 112 | struct at91_request *req; |
| 113 | unsigned long flags; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 114 | struct at91_udc *udc = ep->udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 115 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 116 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 117 | |
| 118 | csr = __raw_readl(ep->creg); |
| 119 | |
| 120 | /* NOTE: not collecting per-endpoint irq statistics... */ |
| 121 | |
| 122 | seq_printf(s, "\n"); |
| 123 | seq_printf(s, "%s, maxpacket %d %s%s %s%s\n", |
| 124 | ep->ep.name, ep->ep.maxpacket, |
| 125 | ep->is_in ? "in" : "out", |
| 126 | ep->is_iso ? " iso" : "", |
| 127 | ep->is_pingpong |
| 128 | ? (ep->fifo_bank ? "pong" : "ping") |
| 129 | : "", |
| 130 | ep->stopped ? " stopped" : ""); |
| 131 | seq_printf(s, "csr %08x rxbytes=%d %s %s %s" EIGHTBITS "\n", |
| 132 | csr, |
| 133 | (csr & 0x07ff0000) >> 16, |
| 134 | (csr & (1 << 15)) ? "enabled" : "disabled", |
| 135 | (csr & (1 << 11)) ? "DATA1" : "DATA0", |
| 136 | types[(csr & 0x700) >> 8], |
| 137 | |
| 138 | /* iff type is control then print current direction */ |
| 139 | (!(csr & 0x700)) |
| 140 | ? ((csr & (1 << 7)) ? " IN" : " OUT") |
| 141 | : "", |
| 142 | (csr & (1 << 6)) ? " rxdatabk1" : "", |
| 143 | (csr & (1 << 5)) ? " forcestall" : "", |
| 144 | (csr & (1 << 4)) ? " txpktrdy" : "", |
| 145 | |
| 146 | (csr & (1 << 3)) ? " stallsent" : "", |
| 147 | (csr & (1 << 2)) ? " rxsetup" : "", |
| 148 | (csr & (1 << 1)) ? " rxdatabk0" : "", |
| 149 | (csr & (1 << 0)) ? " txcomp" : ""); |
| 150 | if (list_empty (&ep->queue)) |
| 151 | seq_printf(s, "\t(queue empty)\n"); |
| 152 | |
| 153 | else list_for_each_entry (req, &ep->queue, queue) { |
| 154 | unsigned length = req->req.actual; |
| 155 | |
| 156 | seq_printf(s, "\treq %p len %d/%d buf %p\n", |
| 157 | &req->req, length, |
| 158 | req->req.length, req->req.buf); |
| 159 | } |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 160 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | static void proc_irq_show(struct seq_file *s, const char *label, u32 mask) |
| 164 | { |
| 165 | int i; |
| 166 | |
| 167 | seq_printf(s, "%s %04x:%s%s" FOURBITS, label, mask, |
| 168 | (mask & (1 << 13)) ? " wakeup" : "", |
| 169 | (mask & (1 << 12)) ? " endbusres" : "", |
| 170 | |
| 171 | (mask & (1 << 11)) ? " sofint" : "", |
| 172 | (mask & (1 << 10)) ? " extrsm" : "", |
| 173 | (mask & (1 << 9)) ? " rxrsm" : "", |
| 174 | (mask & (1 << 8)) ? " rxsusp" : ""); |
| 175 | for (i = 0; i < 8; i++) { |
| 176 | if (mask & (1 << i)) |
| 177 | seq_printf(s, " ep%d", i); |
| 178 | } |
| 179 | seq_printf(s, "\n"); |
| 180 | } |
| 181 | |
| 182 | static int proc_udc_show(struct seq_file *s, void *unused) |
| 183 | { |
| 184 | struct at91_udc *udc = s->private; |
| 185 | struct at91_ep *ep; |
| 186 | u32 tmp; |
| 187 | |
| 188 | seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); |
| 189 | |
| 190 | seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", |
| 191 | udc->vbus ? "present" : "off", |
| 192 | udc->enabled |
| 193 | ? (udc->vbus ? "active" : "enabled") |
| 194 | : "disabled", |
Peter Chen | 7301971 | 2015-01-28 16:32:26 +0800 | [diff] [blame] | 195 | udc->gadget.is_selfpowered ? "self" : "VBUS", |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 196 | udc->suspended ? ", suspended" : "", |
| 197 | udc->driver ? udc->driver->driver.name : "(none)"); |
| 198 | |
| 199 | /* don't access registers when interface isn't clocked */ |
| 200 | if (!udc->clocked) { |
| 201 | seq_printf(s, "(not clocked)\n"); |
| 202 | return 0; |
| 203 | } |
| 204 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 205 | tmp = at91_udp_read(udc, AT91_UDP_FRM_NUM); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 206 | seq_printf(s, "frame %05x:%s%s frame=%d\n", tmp, |
| 207 | (tmp & AT91_UDP_FRM_OK) ? " ok" : "", |
| 208 | (tmp & AT91_UDP_FRM_ERR) ? " err" : "", |
| 209 | (tmp & AT91_UDP_NUM)); |
| 210 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 211 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 212 | seq_printf(s, "glbstate %02x:%s" FOURBITS "\n", tmp, |
| 213 | (tmp & AT91_UDP_RMWUPE) ? " rmwupe" : "", |
| 214 | (tmp & AT91_UDP_RSMINPR) ? " rsminpr" : "", |
| 215 | (tmp & AT91_UDP_ESR) ? " esr" : "", |
| 216 | (tmp & AT91_UDP_CONFG) ? " confg" : "", |
| 217 | (tmp & AT91_UDP_FADDEN) ? " fadden" : ""); |
| 218 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 219 | tmp = at91_udp_read(udc, AT91_UDP_FADDR); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 220 | seq_printf(s, "faddr %03x:%s fadd=%d\n", tmp, |
| 221 | (tmp & AT91_UDP_FEN) ? " fen" : "", |
| 222 | (tmp & AT91_UDP_FADD)); |
| 223 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 224 | proc_irq_show(s, "imr ", at91_udp_read(udc, AT91_UDP_IMR)); |
| 225 | proc_irq_show(s, "isr ", at91_udp_read(udc, AT91_UDP_ISR)); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 226 | |
| 227 | if (udc->enabled && udc->vbus) { |
| 228 | proc_ep_show(s, &udc->ep[0]); |
| 229 | list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) { |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 230 | if (ep->ep.desc) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 231 | proc_ep_show(s, ep); |
| 232 | } |
| 233 | } |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static int proc_udc_open(struct inode *inode, struct file *file) |
| 238 | { |
Al Viro | d9dda78 | 2013-03-31 18:16:14 -0400 | [diff] [blame] | 239 | return single_open(file, proc_udc_show, PDE_DATA(inode)); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 240 | } |
| 241 | |
Luiz Fernando N. Capitulino | 066202d | 2006-08-05 20:37:11 -0300 | [diff] [blame] | 242 | static const struct file_operations proc_ops = { |
Denis V. Lunev | cdefa18 | 2008-04-29 01:02:19 -0700 | [diff] [blame] | 243 | .owner = THIS_MODULE, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 244 | .open = proc_udc_open, |
| 245 | .read = seq_read, |
| 246 | .llseek = seq_lseek, |
| 247 | .release = single_release, |
| 248 | }; |
| 249 | |
| 250 | static void create_debug_file(struct at91_udc *udc) |
| 251 | { |
Denis V. Lunev | cdefa18 | 2008-04-29 01:02:19 -0700 | [diff] [blame] | 252 | udc->pde = proc_create_data(debug_filename, 0, NULL, &proc_ops, udc); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | static void remove_debug_file(struct at91_udc *udc) |
| 256 | { |
| 257 | if (udc->pde) |
| 258 | remove_proc_entry(debug_filename, NULL); |
| 259 | } |
| 260 | |
| 261 | #else |
| 262 | |
| 263 | static inline void create_debug_file(struct at91_udc *udc) {} |
| 264 | static inline void remove_debug_file(struct at91_udc *udc) {} |
| 265 | |
| 266 | #endif |
| 267 | |
| 268 | |
| 269 | /*-------------------------------------------------------------------------*/ |
| 270 | |
| 271 | static void done(struct at91_ep *ep, struct at91_request *req, int status) |
| 272 | { |
| 273 | unsigned stopped = ep->stopped; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 274 | struct at91_udc *udc = ep->udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 275 | |
| 276 | list_del_init(&req->queue); |
| 277 | if (req->req.status == -EINPROGRESS) |
| 278 | req->req.status = status; |
| 279 | else |
| 280 | status = req->req.status; |
| 281 | if (status && status != -ESHUTDOWN) |
| 282 | VDBG("%s done %p, status %d\n", ep->ep.name, req, status); |
| 283 | |
| 284 | ep->stopped = 1; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 285 | spin_unlock(&udc->lock); |
Michal Sojka | 304f7e5 | 2014-09-24 22:43:19 +0200 | [diff] [blame] | 286 | usb_gadget_giveback_request(&ep->ep, &req->req); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 287 | spin_lock(&udc->lock); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 288 | ep->stopped = stopped; |
| 289 | |
| 290 | /* ep0 is always ready; other endpoints need a non-empty queue */ |
| 291 | if (list_empty(&ep->queue) && ep->int_mask != (1 << 0)) |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 292 | at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | /*-------------------------------------------------------------------------*/ |
| 296 | |
| 297 | /* bits indicating OUT fifo has data ready */ |
| 298 | #define RX_DATA_READY (AT91_UDP_RX_DATA_BK0 | AT91_UDP_RX_DATA_BK1) |
| 299 | |
| 300 | /* |
| 301 | * Endpoint FIFO CSR bits have a mix of bits, making it unsafe to just write |
| 302 | * back most of the value you just read (because of side effects, including |
| 303 | * bits that may change after reading and before writing). |
| 304 | * |
| 305 | * Except when changing a specific bit, always write values which: |
| 306 | * - clear SET_FX bits (setting them could change something) |
| 307 | * - set CLR_FX bits (clearing them could change something) |
| 308 | * |
| 309 | * There are also state bits like FORCESTALL, EPEDS, DIR, and EPTYPE |
| 310 | * that shouldn't normally be changed. |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 311 | * |
| 312 | * NOTE at91sam9260 docs mention synch between UDPCK and MCK clock domains, |
| 313 | * implying a need to wait for one write to complete (test relevant bits) |
| 314 | * before starting the next write. This shouldn't be an issue given how |
| 315 | * infrequently we write, except maybe for write-then-read idioms. |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 316 | */ |
| 317 | #define SET_FX (AT91_UDP_TXPKTRDY) |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 318 | #define CLR_FX (RX_DATA_READY | AT91_UDP_RXSETUP \ |
| 319 | | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 320 | |
| 321 | /* pull OUT packet data from the endpoint's fifo */ |
| 322 | static int read_fifo (struct at91_ep *ep, struct at91_request *req) |
| 323 | { |
| 324 | u32 __iomem *creg = ep->creg; |
| 325 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); |
| 326 | u32 csr; |
| 327 | u8 *buf; |
| 328 | unsigned int count, bufferspace, is_done; |
| 329 | |
| 330 | buf = req->req.buf + req->req.actual; |
| 331 | bufferspace = req->req.length - req->req.actual; |
| 332 | |
| 333 | /* |
| 334 | * there might be nothing to read if ep_queue() calls us, |
| 335 | * or if we already emptied both pingpong buffers |
| 336 | */ |
| 337 | rescan: |
| 338 | csr = __raw_readl(creg); |
| 339 | if ((csr & RX_DATA_READY) == 0) |
| 340 | return 0; |
| 341 | |
| 342 | count = (csr & AT91_UDP_RXBYTECNT) >> 16; |
| 343 | if (count > ep->ep.maxpacket) |
| 344 | count = ep->ep.maxpacket; |
| 345 | if (count > bufferspace) { |
| 346 | DBG("%s buffer overflow\n", ep->ep.name); |
| 347 | req->req.status = -EOVERFLOW; |
| 348 | count = bufferspace; |
| 349 | } |
| 350 | __raw_readsb(dreg, buf, count); |
| 351 | |
| 352 | /* release and swap pingpong mem bank */ |
| 353 | csr |= CLR_FX; |
| 354 | if (ep->is_pingpong) { |
| 355 | if (ep->fifo_bank == 0) { |
| 356 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); |
| 357 | ep->fifo_bank = 1; |
| 358 | } else { |
| 359 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK1); |
| 360 | ep->fifo_bank = 0; |
| 361 | } |
| 362 | } else |
| 363 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); |
| 364 | __raw_writel(csr, creg); |
| 365 | |
| 366 | req->req.actual += count; |
| 367 | is_done = (count < ep->ep.maxpacket); |
| 368 | if (count == bufferspace) |
| 369 | is_done = 1; |
| 370 | |
| 371 | PACKET("%s %p out/%d%s\n", ep->ep.name, &req->req, count, |
| 372 | is_done ? " (done)" : ""); |
| 373 | |
| 374 | /* |
| 375 | * avoid extra trips through IRQ logic for packets already in |
| 376 | * the fifo ... maybe preventing an extra (expensive) OUT-NAK |
| 377 | */ |
| 378 | if (is_done) |
| 379 | done(ep, req, 0); |
| 380 | else if (ep->is_pingpong) { |
Harro Haan | 7622537 | 2010-03-01 17:54:55 +0100 | [diff] [blame] | 381 | /* |
| 382 | * One dummy read to delay the code because of a HW glitch: |
| 383 | * CSR returns bad RXCOUNT when read too soon after updating |
| 384 | * RX_DATA_BK flags. |
| 385 | */ |
| 386 | csr = __raw_readl(creg); |
| 387 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 388 | bufferspace -= count; |
| 389 | buf += count; |
| 390 | goto rescan; |
| 391 | } |
| 392 | |
| 393 | return is_done; |
| 394 | } |
| 395 | |
| 396 | /* load fifo for an IN packet */ |
| 397 | static int write_fifo(struct at91_ep *ep, struct at91_request *req) |
| 398 | { |
| 399 | u32 __iomem *creg = ep->creg; |
| 400 | u32 csr = __raw_readl(creg); |
| 401 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); |
| 402 | unsigned total, count, is_last; |
David Brownell | 3cf2723 | 2008-04-06 23:32:55 -0700 | [diff] [blame] | 403 | u8 *buf; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 404 | |
| 405 | /* |
| 406 | * TODO: allow for writing two packets to the fifo ... that'll |
| 407 | * reduce the amount of IN-NAKing, but probably won't affect |
| 408 | * throughput much. (Unlike preventing OUT-NAKing!) |
| 409 | */ |
| 410 | |
| 411 | /* |
| 412 | * If ep_queue() calls us, the queue is empty and possibly in |
| 413 | * odd states like TXCOMP not yet cleared (we do it, saving at |
| 414 | * least one IRQ) or the fifo not yet being free. Those aren't |
| 415 | * issues normally (IRQ handler fast path). |
| 416 | */ |
| 417 | if (unlikely(csr & (AT91_UDP_TXCOMP | AT91_UDP_TXPKTRDY))) { |
| 418 | if (csr & AT91_UDP_TXCOMP) { |
| 419 | csr |= CLR_FX; |
| 420 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); |
| 421 | __raw_writel(csr, creg); |
| 422 | csr = __raw_readl(creg); |
| 423 | } |
| 424 | if (csr & AT91_UDP_TXPKTRDY) |
| 425 | return 0; |
| 426 | } |
| 427 | |
David Brownell | 3cf2723 | 2008-04-06 23:32:55 -0700 | [diff] [blame] | 428 | buf = req->req.buf + req->req.actual; |
| 429 | prefetch(buf); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 430 | total = req->req.length - req->req.actual; |
| 431 | if (ep->ep.maxpacket < total) { |
| 432 | count = ep->ep.maxpacket; |
| 433 | is_last = 0; |
| 434 | } else { |
| 435 | count = total; |
| 436 | is_last = (count < ep->ep.maxpacket) || !req->req.zero; |
| 437 | } |
| 438 | |
| 439 | /* |
| 440 | * Write the packet, maybe it's a ZLP. |
| 441 | * |
| 442 | * NOTE: incrementing req->actual before we receive the ACK means |
| 443 | * gadget driver IN bytecounts can be wrong in fault cases. That's |
| 444 | * fixable with PIO drivers like this one (save "count" here, and |
| 445 | * do the increment later on TX irq), but not for most DMA hardware. |
| 446 | * |
| 447 | * So all gadget drivers must accept that potential error. Some |
| 448 | * hardware supports precise fifo status reporting, letting them |
| 449 | * recover when the actual bytecount matters (e.g. for USB Test |
| 450 | * and Measurement Class devices). |
| 451 | */ |
David Brownell | 3cf2723 | 2008-04-06 23:32:55 -0700 | [diff] [blame] | 452 | __raw_writesb(dreg, buf, count); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 453 | csr &= ~SET_FX; |
| 454 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; |
| 455 | __raw_writel(csr, creg); |
| 456 | req->req.actual += count; |
| 457 | |
| 458 | PACKET("%s %p in/%d%s\n", ep->ep.name, &req->req, count, |
| 459 | is_last ? " (done)" : ""); |
| 460 | if (is_last) |
| 461 | done(ep, req, 0); |
| 462 | return is_last; |
| 463 | } |
| 464 | |
| 465 | static void nuke(struct at91_ep *ep, int status) |
| 466 | { |
| 467 | struct at91_request *req; |
| 468 | |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 469 | /* terminate any request in the queue */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 470 | ep->stopped = 1; |
| 471 | if (list_empty(&ep->queue)) |
| 472 | return; |
| 473 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 474 | VDBG("%s %s\n", __func__, ep->ep.name); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 475 | while (!list_empty(&ep->queue)) { |
| 476 | req = list_entry(ep->queue.next, struct at91_request, queue); |
| 477 | done(ep, req, status); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | /*-------------------------------------------------------------------------*/ |
| 482 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 483 | static int at91_ep_enable(struct usb_ep *_ep, |
| 484 | const struct usb_endpoint_descriptor *desc) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 485 | { |
| 486 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); |
Wei Yongjun | 162ca3c | 2012-09-07 14:54:25 +0800 | [diff] [blame] | 487 | struct at91_udc *udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 488 | u16 maxpacket; |
| 489 | u32 tmp; |
| 490 | unsigned long flags; |
| 491 | |
| 492 | if (!_ep || !ep |
Sebastian Andrzej Siewior | f3bb8e6 | 2012-07-20 20:34:25 +0200 | [diff] [blame] | 493 | || !desc || _ep->name == ep0name |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 494 | || desc->bDescriptorType != USB_DT_ENDPOINT |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 495 | || (maxpacket = usb_endpoint_maxp(desc)) == 0 |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 496 | || maxpacket > ep->maxpacket) { |
| 497 | DBG("bad ep or descriptor\n"); |
| 498 | return -EINVAL; |
| 499 | } |
| 500 | |
Wei Yongjun | 162ca3c | 2012-09-07 14:54:25 +0800 | [diff] [blame] | 501 | udc = ep->udc; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 502 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 503 | DBG("bogus device state\n"); |
| 504 | return -ESHUTDOWN; |
| 505 | } |
| 506 | |
Matthias Kaehlcke | 81c8d8d | 2009-04-15 22:28:02 +0200 | [diff] [blame] | 507 | tmp = usb_endpoint_type(desc); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 508 | switch (tmp) { |
| 509 | case USB_ENDPOINT_XFER_CONTROL: |
| 510 | DBG("only one control endpoint\n"); |
| 511 | return -EINVAL; |
| 512 | case USB_ENDPOINT_XFER_INT: |
| 513 | if (maxpacket > 64) |
| 514 | goto bogus_max; |
| 515 | break; |
| 516 | case USB_ENDPOINT_XFER_BULK: |
| 517 | switch (maxpacket) { |
| 518 | case 8: |
| 519 | case 16: |
| 520 | case 32: |
| 521 | case 64: |
| 522 | goto ok; |
| 523 | } |
| 524 | bogus_max: |
| 525 | DBG("bogus maxpacket %d\n", maxpacket); |
| 526 | return -EINVAL; |
| 527 | case USB_ENDPOINT_XFER_ISOC: |
| 528 | if (!ep->is_pingpong) { |
| 529 | DBG("iso requires double buffering\n"); |
| 530 | return -EINVAL; |
| 531 | } |
| 532 | break; |
| 533 | } |
| 534 | |
| 535 | ok: |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 536 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 537 | |
| 538 | /* initialize endpoint to match this descriptor */ |
Matthias Kaehlcke | 81c8d8d | 2009-04-15 22:28:02 +0200 | [diff] [blame] | 539 | ep->is_in = usb_endpoint_dir_in(desc); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 540 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC); |
| 541 | ep->stopped = 0; |
| 542 | if (ep->is_in) |
| 543 | tmp |= 0x04; |
| 544 | tmp <<= 8; |
| 545 | tmp |= AT91_UDP_EPEDS; |
| 546 | __raw_writel(tmp, ep->creg); |
| 547 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 548 | ep->ep.maxpacket = maxpacket; |
| 549 | |
| 550 | /* |
| 551 | * reset/init endpoint fifo. NOTE: leaves fifo_bank alone, |
| 552 | * since endpoint resets don't reset hw pingpong state. |
| 553 | */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 554 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
| 555 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 556 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 557 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | static int at91_ep_disable (struct usb_ep * _ep) |
| 562 | { |
| 563 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 564 | struct at91_udc *udc = ep->udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 565 | unsigned long flags; |
| 566 | |
| 567 | if (ep == &ep->udc->ep[0]) |
| 568 | return -EINVAL; |
| 569 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 570 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 571 | |
| 572 | nuke(ep, -ESHUTDOWN); |
| 573 | |
| 574 | /* restore the endpoint's pristine config */ |
Ido Shayevitz | f9c56cd | 2012-02-08 13:56:48 +0200 | [diff] [blame] | 575 | ep->ep.desc = NULL; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 576 | ep->ep.maxpacket = ep->maxpacket; |
| 577 | |
| 578 | /* reset fifos and endpoint */ |
| 579 | if (ep->udc->clocked) { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 580 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
| 581 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 582 | __raw_writel(0, ep->creg); |
| 583 | } |
| 584 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 585 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | /* |
| 590 | * this is a PIO-only driver, so there's nothing |
| 591 | * interesting for request or buffer allocation. |
| 592 | */ |
| 593 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 594 | static struct usb_request * |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 595 | at91_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 596 | { |
| 597 | struct at91_request *req; |
| 598 | |
Robert P. J. Day | cd86128 | 2006-12-13 00:34:52 -0800 | [diff] [blame] | 599 | req = kzalloc(sizeof (struct at91_request), gfp_flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 600 | if (!req) |
| 601 | return NULL; |
| 602 | |
| 603 | INIT_LIST_HEAD(&req->queue); |
| 604 | return &req->req; |
| 605 | } |
| 606 | |
| 607 | static void at91_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| 608 | { |
| 609 | struct at91_request *req; |
| 610 | |
| 611 | req = container_of(_req, struct at91_request, req); |
| 612 | BUG_ON(!list_empty(&req->queue)); |
| 613 | kfree(req); |
| 614 | } |
| 615 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 616 | static int at91_ep_queue(struct usb_ep *_ep, |
| 617 | struct usb_request *_req, gfp_t gfp_flags) |
| 618 | { |
| 619 | struct at91_request *req; |
| 620 | struct at91_ep *ep; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 621 | struct at91_udc *udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 622 | int status; |
| 623 | unsigned long flags; |
| 624 | |
| 625 | req = container_of(_req, struct at91_request, req); |
| 626 | ep = container_of(_ep, struct at91_ep, ep); |
| 627 | |
| 628 | if (!_req || !_req->complete |
| 629 | || !_req->buf || !list_empty(&req->queue)) { |
| 630 | DBG("invalid request\n"); |
| 631 | return -EINVAL; |
| 632 | } |
| 633 | |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 634 | if (!_ep || (!ep->ep.desc && ep->ep.name != ep0name)) { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 635 | DBG("invalid ep\n"); |
| 636 | return -EINVAL; |
| 637 | } |
| 638 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 639 | udc = ep->udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 640 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 641 | if (!udc || !udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 642 | DBG("invalid device\n"); |
| 643 | return -EINVAL; |
| 644 | } |
| 645 | |
| 646 | _req->status = -EINPROGRESS; |
| 647 | _req->actual = 0; |
| 648 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 649 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 650 | |
| 651 | /* try to kickstart any empty and idle queue */ |
| 652 | if (list_empty(&ep->queue) && !ep->stopped) { |
| 653 | int is_ep0; |
| 654 | |
| 655 | /* |
| 656 | * If this control request has a non-empty DATA stage, this |
| 657 | * will start that stage. It works just like a non-control |
| 658 | * request (until the status stage starts, maybe early). |
| 659 | * |
| 660 | * If the data stage is empty, then this starts a successful |
| 661 | * IN/STATUS stage. (Unsuccessful ones use set_halt.) |
| 662 | */ |
| 663 | is_ep0 = (ep->ep.name == ep0name); |
| 664 | if (is_ep0) { |
| 665 | u32 tmp; |
| 666 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 667 | if (!udc->req_pending) { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 668 | status = -EINVAL; |
| 669 | goto done; |
| 670 | } |
| 671 | |
| 672 | /* |
| 673 | * defer changing CONFG until after the gadget driver |
| 674 | * reconfigures the endpoints. |
| 675 | */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 676 | if (udc->wait_for_config_ack) { |
| 677 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 678 | tmp ^= AT91_UDP_CONFG; |
| 679 | VDBG("toggle config\n"); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 680 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 681 | } |
| 682 | if (req->req.length == 0) { |
| 683 | ep0_in_status: |
| 684 | PACKET("ep0 in/status\n"); |
| 685 | status = 0; |
| 686 | tmp = __raw_readl(ep->creg); |
| 687 | tmp &= ~SET_FX; |
| 688 | tmp |= CLR_FX | AT91_UDP_TXPKTRDY; |
| 689 | __raw_writel(tmp, ep->creg); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 690 | udc->req_pending = 0; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 691 | goto done; |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | if (ep->is_in) |
| 696 | status = write_fifo(ep, req); |
| 697 | else { |
| 698 | status = read_fifo(ep, req); |
| 699 | |
| 700 | /* IN/STATUS stage is otherwise triggered by irq */ |
| 701 | if (status && is_ep0) |
| 702 | goto ep0_in_status; |
| 703 | } |
| 704 | } else |
| 705 | status = 0; |
| 706 | |
| 707 | if (req && !status) { |
| 708 | list_add_tail (&req->queue, &ep->queue); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 709 | at91_udp_write(udc, AT91_UDP_IER, ep->int_mask); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 710 | } |
| 711 | done: |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 712 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 713 | return (status < 0) ? status : 0; |
| 714 | } |
| 715 | |
| 716 | static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 717 | { |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 718 | struct at91_ep *ep; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 719 | struct at91_request *req; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 720 | unsigned long flags; |
| 721 | struct at91_udc *udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 722 | |
| 723 | ep = container_of(_ep, struct at91_ep, ep); |
| 724 | if (!_ep || ep->ep.name == ep0name) |
| 725 | return -EINVAL; |
| 726 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 727 | udc = ep->udc; |
| 728 | |
| 729 | spin_lock_irqsave(&udc->lock, flags); |
| 730 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 731 | /* make sure it's actually queued on this endpoint */ |
| 732 | list_for_each_entry (req, &ep->queue, queue) { |
| 733 | if (&req->req == _req) |
| 734 | break; |
| 735 | } |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 736 | if (&req->req != _req) { |
| 737 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 738 | return -EINVAL; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 739 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 740 | |
| 741 | done(ep, req, -ECONNRESET); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 742 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | static int at91_ep_set_halt(struct usb_ep *_ep, int value) |
| 747 | { |
| 748 | struct at91_ep *ep = container_of(_ep, struct at91_ep, ep); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 749 | struct at91_udc *udc = ep->udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 750 | u32 __iomem *creg; |
| 751 | u32 csr; |
| 752 | unsigned long flags; |
| 753 | int status = 0; |
| 754 | |
| 755 | if (!_ep || ep->is_iso || !ep->udc->clocked) |
| 756 | return -EINVAL; |
| 757 | |
| 758 | creg = ep->creg; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 759 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 760 | |
| 761 | csr = __raw_readl(creg); |
| 762 | |
| 763 | /* |
| 764 | * fail with still-busy IN endpoints, ensuring correct sequencing |
| 765 | * of data tx then stall. note that the fifo rx bytecount isn't |
| 766 | * completely accurate as a tx bytecount. |
| 767 | */ |
| 768 | if (ep->is_in && (!list_empty(&ep->queue) || (csr >> 16) != 0)) |
| 769 | status = -EAGAIN; |
| 770 | else { |
| 771 | csr |= CLR_FX; |
| 772 | csr &= ~SET_FX; |
| 773 | if (value) { |
| 774 | csr |= AT91_UDP_FORCESTALL; |
| 775 | VDBG("halt %s\n", ep->ep.name); |
| 776 | } else { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 777 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
| 778 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 779 | csr &= ~AT91_UDP_FORCESTALL; |
| 780 | } |
| 781 | __raw_writel(csr, creg); |
| 782 | } |
| 783 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 784 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 785 | return status; |
| 786 | } |
| 787 | |
David Brownell | 398acce | 2007-02-15 18:47:17 -0800 | [diff] [blame] | 788 | static const struct usb_ep_ops at91_ep_ops = { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 789 | .enable = at91_ep_enable, |
| 790 | .disable = at91_ep_disable, |
| 791 | .alloc_request = at91_ep_alloc_request, |
| 792 | .free_request = at91_ep_free_request, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 793 | .queue = at91_ep_queue, |
| 794 | .dequeue = at91_ep_dequeue, |
| 795 | .set_halt = at91_ep_set_halt, |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 796 | /* there's only imprecise fifo status reporting */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 797 | }; |
| 798 | |
| 799 | /*-------------------------------------------------------------------------*/ |
| 800 | |
| 801 | static int at91_get_frame(struct usb_gadget *gadget) |
| 802 | { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 803 | struct at91_udc *udc = to_udc(gadget); |
| 804 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 805 | if (!to_udc(gadget)->clocked) |
| 806 | return -EINVAL; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 807 | return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | static int at91_wakeup(struct usb_gadget *gadget) |
| 811 | { |
| 812 | struct at91_udc *udc = to_udc(gadget); |
| 813 | u32 glbstate; |
| 814 | int status = -EINVAL; |
| 815 | unsigned long flags; |
| 816 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 817 | DBG("%s\n", __func__ ); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 818 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 819 | |
| 820 | if (!udc->clocked || !udc->suspended) |
| 821 | goto done; |
| 822 | |
| 823 | /* NOTE: some "early versions" handle ESR differently ... */ |
| 824 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 825 | glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 826 | if (!(glbstate & AT91_UDP_ESR)) |
| 827 | goto done; |
| 828 | glbstate |= AT91_UDP_ESR; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 829 | at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 830 | |
| 831 | done: |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 832 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 833 | return status; |
| 834 | } |
| 835 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 836 | /* reinit == restore initial software state */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 837 | static void udc_reinit(struct at91_udc *udc) |
| 838 | { |
| 839 | u32 i; |
| 840 | |
| 841 | INIT_LIST_HEAD(&udc->gadget.ep_list); |
| 842 | INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); |
Robert Baldyga | 02ded1b | 2015-07-28 07:19:59 +0200 | [diff] [blame] | 843 | udc->gadget.quirk_stall_not_supp = 1; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 844 | |
| 845 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 846 | struct at91_ep *ep = &udc->ep[i]; |
| 847 | |
| 848 | if (i != 0) |
| 849 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 850 | ep->ep.desc = NULL; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 851 | ep->stopped = 0; |
| 852 | ep->fifo_bank = 0; |
Robert Baldyga | e117e74 | 2013-12-13 12:23:38 +0100 | [diff] [blame] | 853 | usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 854 | ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i); |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 855 | /* initialize one queue per endpoint */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 856 | INIT_LIST_HEAD(&ep->queue); |
| 857 | } |
| 858 | } |
| 859 | |
Peter Chen | 236e506 | 2014-11-06 14:28:02 +0800 | [diff] [blame] | 860 | static void reset_gadget(struct at91_udc *udc) |
| 861 | { |
| 862 | struct usb_gadget_driver *driver = udc->driver; |
| 863 | int i; |
| 864 | |
| 865 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 866 | driver = NULL; |
| 867 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
| 868 | udc->suspended = 0; |
| 869 | |
| 870 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 871 | struct at91_ep *ep = &udc->ep[i]; |
| 872 | |
| 873 | ep->stopped = 1; |
| 874 | nuke(ep, -ESHUTDOWN); |
| 875 | } |
| 876 | if (driver) { |
| 877 | spin_unlock(&udc->lock); |
| 878 | usb_gadget_udc_reset(&udc->gadget, driver); |
| 879 | spin_lock(&udc->lock); |
| 880 | } |
| 881 | |
| 882 | udc_reinit(udc); |
| 883 | } |
| 884 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 885 | static void stop_activity(struct at91_udc *udc) |
| 886 | { |
| 887 | struct usb_gadget_driver *driver = udc->driver; |
| 888 | int i; |
| 889 | |
| 890 | if (udc->gadget.speed == USB_SPEED_UNKNOWN) |
| 891 | driver = NULL; |
| 892 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 893 | udc->suspended = 0; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 894 | |
| 895 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 896 | struct at91_ep *ep = &udc->ep[i]; |
| 897 | ep->stopped = 1; |
| 898 | nuke(ep, -ESHUTDOWN); |
| 899 | } |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 900 | if (driver) { |
| 901 | spin_unlock(&udc->lock); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 902 | driver->disconnect(&udc->gadget); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 903 | spin_lock(&udc->lock); |
| 904 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 905 | |
| 906 | udc_reinit(udc); |
| 907 | } |
| 908 | |
| 909 | static void clk_on(struct at91_udc *udc) |
| 910 | { |
| 911 | if (udc->clocked) |
| 912 | return; |
| 913 | udc->clocked = 1; |
Boris BREZILLON | c0aefc7 | 2013-08-02 10:37:34 +0200 | [diff] [blame] | 914 | |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 915 | clk_enable(udc->iclk); |
| 916 | clk_enable(udc->fclk); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | static void clk_off(struct at91_udc *udc) |
| 920 | { |
| 921 | if (!udc->clocked) |
| 922 | return; |
| 923 | udc->clocked = 0; |
| 924 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 925 | clk_disable(udc->fclk); |
| 926 | clk_disable(udc->iclk); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 927 | } |
| 928 | |
| 929 | /* |
| 930 | * activate/deactivate link with host; minimize power usage for |
| 931 | * inactive links by cutting clocks and transceiver power. |
| 932 | */ |
| 933 | static void pullup(struct at91_udc *udc, int is_on) |
| 934 | { |
| 935 | if (!udc->enabled || !udc->vbus) |
| 936 | is_on = 0; |
| 937 | DBG("%sactive\n", is_on ? "" : "in"); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 938 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 939 | if (is_on) { |
| 940 | clk_on(udc); |
Nicolas Ferre | 08cbc70 | 2007-12-13 15:52:58 -0800 | [diff] [blame] | 941 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 942 | at91_udp_write(udc, AT91_UDP_TXVC, 0); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 943 | } else { |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 944 | stop_activity(udc); |
Nicolas Ferre | 08cbc70 | 2007-12-13 15:52:58 -0800 | [diff] [blame] | 945 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 946 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 947 | clk_off(udc); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 948 | } |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 949 | |
| 950 | if (udc->caps && udc->caps->pullup) |
| 951 | udc->caps->pullup(udc, is_on); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | /* vbus is here! turn everything on that's ready */ |
| 955 | static int at91_vbus_session(struct usb_gadget *gadget, int is_active) |
| 956 | { |
| 957 | struct at91_udc *udc = to_udc(gadget); |
| 958 | unsigned long flags; |
| 959 | |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 960 | /* VDBG("vbus %s\n", is_active ? "on" : "off"); */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 961 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 962 | udc->vbus = (is_active != 0); |
Wojtek Kaniewski | bfb7fb7 | 2006-12-08 03:26:00 -0800 | [diff] [blame] | 963 | if (udc->driver) |
| 964 | pullup(udc, is_active); |
| 965 | else |
| 966 | pullup(udc, 0); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 967 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | static int at91_pullup(struct usb_gadget *gadget, int is_on) |
| 972 | { |
| 973 | struct at91_udc *udc = to_udc(gadget); |
| 974 | unsigned long flags; |
| 975 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 976 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 977 | udc->enabled = is_on = !!is_on; |
| 978 | pullup(udc, is_on); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 979 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 980 | return 0; |
| 981 | } |
| 982 | |
| 983 | static int at91_set_selfpowered(struct usb_gadget *gadget, int is_on) |
| 984 | { |
| 985 | struct at91_udc *udc = to_udc(gadget); |
| 986 | unsigned long flags; |
| 987 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 988 | spin_lock_irqsave(&udc->lock, flags); |
Peter Chen | 7301971 | 2015-01-28 16:32:26 +0800 | [diff] [blame] | 989 | gadget->is_selfpowered = (is_on != 0); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 990 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 991 | return 0; |
| 992 | } |
| 993 | |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 994 | static int at91_start(struct usb_gadget *gadget, |
| 995 | struct usb_gadget_driver *driver); |
Felipe Balbi | 22835b8 | 2014-10-17 12:05:12 -0500 | [diff] [blame] | 996 | static int at91_stop(struct usb_gadget *gadget); |
| 997 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 998 | static const struct usb_gadget_ops at91_udc_ops = { |
| 999 | .get_frame = at91_get_frame, |
| 1000 | .wakeup = at91_wakeup, |
| 1001 | .set_selfpowered = at91_set_selfpowered, |
| 1002 | .vbus_session = at91_vbus_session, |
| 1003 | .pullup = at91_pullup, |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1004 | .udc_start = at91_start, |
| 1005 | .udc_stop = at91_stop, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1006 | |
| 1007 | /* |
| 1008 | * VBUS-powered devices may also also want to support bigger |
| 1009 | * power budgets after an appropriate SET_CONFIGURATION. |
| 1010 | */ |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 1011 | /* .vbus_power = at91_vbus_power, */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1012 | }; |
| 1013 | |
| 1014 | /*-------------------------------------------------------------------------*/ |
| 1015 | |
| 1016 | static int handle_ep(struct at91_ep *ep) |
| 1017 | { |
| 1018 | struct at91_request *req; |
| 1019 | u32 __iomem *creg = ep->creg; |
| 1020 | u32 csr = __raw_readl(creg); |
| 1021 | |
| 1022 | if (!list_empty(&ep->queue)) |
| 1023 | req = list_entry(ep->queue.next, |
| 1024 | struct at91_request, queue); |
| 1025 | else |
| 1026 | req = NULL; |
| 1027 | |
| 1028 | if (ep->is_in) { |
| 1029 | if (csr & (AT91_UDP_STALLSENT | AT91_UDP_TXCOMP)) { |
| 1030 | csr |= CLR_FX; |
| 1031 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_TXCOMP); |
| 1032 | __raw_writel(csr, creg); |
| 1033 | } |
| 1034 | if (req) |
| 1035 | return write_fifo(ep, req); |
| 1036 | |
| 1037 | } else { |
| 1038 | if (csr & AT91_UDP_STALLSENT) { |
| 1039 | /* STALLSENT bit == ISOERR */ |
| 1040 | if (ep->is_iso && req) |
| 1041 | req->req.status = -EILSEQ; |
| 1042 | csr |= CLR_FX; |
| 1043 | csr &= ~(SET_FX | AT91_UDP_STALLSENT); |
| 1044 | __raw_writel(csr, creg); |
| 1045 | csr = __raw_readl(creg); |
| 1046 | } |
| 1047 | if (req && (csr & RX_DATA_READY)) |
| 1048 | return read_fifo(ep, req); |
| 1049 | } |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | union setup { |
| 1054 | u8 raw[8]; |
| 1055 | struct usb_ctrlrequest r; |
| 1056 | }; |
| 1057 | |
| 1058 | static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) |
| 1059 | { |
| 1060 | u32 __iomem *creg = ep->creg; |
| 1061 | u8 __iomem *dreg = ep->creg + (AT91_UDP_FDR(0) - AT91_UDP_CSR(0)); |
| 1062 | unsigned rxcount, i = 0; |
| 1063 | u32 tmp; |
| 1064 | union setup pkt; |
| 1065 | int status = 0; |
| 1066 | |
| 1067 | /* read and ack SETUP; hard-fail for bogus packets */ |
| 1068 | rxcount = (csr & AT91_UDP_RXBYTECNT) >> 16; |
| 1069 | if (likely(rxcount == 8)) { |
| 1070 | while (rxcount--) |
| 1071 | pkt.raw[i++] = __raw_readb(dreg); |
| 1072 | if (pkt.r.bRequestType & USB_DIR_IN) { |
| 1073 | csr |= AT91_UDP_DIR; |
| 1074 | ep->is_in = 1; |
| 1075 | } else { |
| 1076 | csr &= ~AT91_UDP_DIR; |
| 1077 | ep->is_in = 0; |
| 1078 | } |
| 1079 | } else { |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 1080 | /* REVISIT this happens sometimes under load; why?? */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1081 | ERR("SETUP len %d, csr %08x\n", rxcount, csr); |
| 1082 | status = -EINVAL; |
| 1083 | } |
| 1084 | csr |= CLR_FX; |
| 1085 | csr &= ~(SET_FX | AT91_UDP_RXSETUP); |
| 1086 | __raw_writel(csr, creg); |
| 1087 | udc->wait_for_addr_ack = 0; |
| 1088 | udc->wait_for_config_ack = 0; |
| 1089 | ep->stopped = 0; |
| 1090 | if (unlikely(status != 0)) |
| 1091 | goto stall; |
| 1092 | |
| 1093 | #define w_index le16_to_cpu(pkt.r.wIndex) |
| 1094 | #define w_value le16_to_cpu(pkt.r.wValue) |
| 1095 | #define w_length le16_to_cpu(pkt.r.wLength) |
| 1096 | |
| 1097 | VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n", |
| 1098 | pkt.r.bRequestType, pkt.r.bRequest, |
| 1099 | w_value, w_index, w_length); |
| 1100 | |
| 1101 | /* |
| 1102 | * A few standard requests get handled here, ones that touch |
| 1103 | * hardware ... notably for device and endpoint features. |
| 1104 | */ |
| 1105 | udc->req_pending = 1; |
| 1106 | csr = __raw_readl(creg); |
| 1107 | csr |= CLR_FX; |
| 1108 | csr &= ~SET_FX; |
| 1109 | switch ((pkt.r.bRequestType << 8) | pkt.r.bRequest) { |
| 1110 | |
| 1111 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) |
| 1112 | | USB_REQ_SET_ADDRESS: |
| 1113 | __raw_writel(csr | AT91_UDP_TXPKTRDY, creg); |
| 1114 | udc->addr = w_value; |
| 1115 | udc->wait_for_addr_ack = 1; |
| 1116 | udc->req_pending = 0; |
| 1117 | /* FADDR is set later, when we ack host STATUS */ |
| 1118 | return; |
| 1119 | |
| 1120 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) |
| 1121 | | USB_REQ_SET_CONFIGURATION: |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1122 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1123 | if (pkt.r.wValue) |
| 1124 | udc->wait_for_config_ack = (tmp == 0); |
| 1125 | else |
| 1126 | udc->wait_for_config_ack = (tmp != 0); |
| 1127 | if (udc->wait_for_config_ack) |
| 1128 | VDBG("wait for config\n"); |
| 1129 | /* CONFG is toggled later, if gadget driver succeeds */ |
| 1130 | break; |
| 1131 | |
| 1132 | /* |
| 1133 | * Hosts may set or clear remote wakeup status, and |
| 1134 | * devices may report they're VBUS powered. |
| 1135 | */ |
| 1136 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) |
| 1137 | | USB_REQ_GET_STATUS: |
Peter Chen | 7301971 | 2015-01-28 16:32:26 +0800 | [diff] [blame] | 1138 | tmp = (udc->gadget.is_selfpowered << USB_DEVICE_SELF_POWERED); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1139 | if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1140 | tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
| 1141 | PACKET("get device status\n"); |
| 1142 | __raw_writeb(tmp, dreg); |
| 1143 | __raw_writeb(0, dreg); |
| 1144 | goto write_in; |
| 1145 | /* then STATUS starts later, automatically */ |
| 1146 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) |
| 1147 | | USB_REQ_SET_FEATURE: |
| 1148 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) |
| 1149 | goto stall; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1150 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1151 | tmp |= AT91_UDP_ESR; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1152 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1153 | goto succeed; |
| 1154 | case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8) |
| 1155 | | USB_REQ_CLEAR_FEATURE: |
| 1156 | if (w_value != USB_DEVICE_REMOTE_WAKEUP) |
| 1157 | goto stall; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1158 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1159 | tmp &= ~AT91_UDP_ESR; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1160 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1161 | goto succeed; |
| 1162 | |
| 1163 | /* |
| 1164 | * Interfaces have no feature settings; this is pretty useless. |
| 1165 | * we won't even insist the interface exists... |
| 1166 | */ |
| 1167 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) |
| 1168 | | USB_REQ_GET_STATUS: |
| 1169 | PACKET("get interface status\n"); |
| 1170 | __raw_writeb(0, dreg); |
| 1171 | __raw_writeb(0, dreg); |
| 1172 | goto write_in; |
| 1173 | /* then STATUS starts later, automatically */ |
| 1174 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) |
| 1175 | | USB_REQ_SET_FEATURE: |
| 1176 | case ((USB_TYPE_STANDARD|USB_RECIP_INTERFACE) << 8) |
| 1177 | | USB_REQ_CLEAR_FEATURE: |
| 1178 | goto stall; |
| 1179 | |
| 1180 | /* |
| 1181 | * Hosts may clear bulk/intr endpoint halt after the gadget |
| 1182 | * driver sets it (not widely used); or set it (for testing) |
| 1183 | */ |
| 1184 | case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) |
| 1185 | | USB_REQ_GET_STATUS: |
| 1186 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; |
| 1187 | ep = &udc->ep[tmp]; |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 1188 | if (tmp >= NUM_ENDPOINTS || (tmp && !ep->ep.desc)) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1189 | goto stall; |
| 1190 | |
| 1191 | if (tmp) { |
| 1192 | if ((w_index & USB_DIR_IN)) { |
| 1193 | if (!ep->is_in) |
| 1194 | goto stall; |
| 1195 | } else if (ep->is_in) |
| 1196 | goto stall; |
| 1197 | } |
| 1198 | PACKET("get %s status\n", ep->ep.name); |
| 1199 | if (__raw_readl(ep->creg) & AT91_UDP_FORCESTALL) |
| 1200 | tmp = (1 << USB_ENDPOINT_HALT); |
| 1201 | else |
| 1202 | tmp = 0; |
| 1203 | __raw_writeb(tmp, dreg); |
| 1204 | __raw_writeb(0, dreg); |
| 1205 | goto write_in; |
| 1206 | /* then STATUS starts later, automatically */ |
| 1207 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) |
| 1208 | | USB_REQ_SET_FEATURE: |
| 1209 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; |
| 1210 | ep = &udc->ep[tmp]; |
David Brownell | 1440e09 | 2007-12-09 22:53:09 -0800 | [diff] [blame] | 1211 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1212 | goto stall; |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 1213 | if (!ep->ep.desc || ep->is_iso) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1214 | goto stall; |
| 1215 | if ((w_index & USB_DIR_IN)) { |
| 1216 | if (!ep->is_in) |
| 1217 | goto stall; |
| 1218 | } else if (ep->is_in) |
| 1219 | goto stall; |
| 1220 | |
| 1221 | tmp = __raw_readl(ep->creg); |
| 1222 | tmp &= ~SET_FX; |
| 1223 | tmp |= CLR_FX | AT91_UDP_FORCESTALL; |
| 1224 | __raw_writel(tmp, ep->creg); |
| 1225 | goto succeed; |
| 1226 | case ((USB_TYPE_STANDARD|USB_RECIP_ENDPOINT) << 8) |
| 1227 | | USB_REQ_CLEAR_FEATURE: |
| 1228 | tmp = w_index & USB_ENDPOINT_NUMBER_MASK; |
| 1229 | ep = &udc->ep[tmp]; |
David Brownell | 1440e09 | 2007-12-09 22:53:09 -0800 | [diff] [blame] | 1230 | if (w_value != USB_ENDPOINT_HALT || tmp >= NUM_ENDPOINTS) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1231 | goto stall; |
| 1232 | if (tmp == 0) |
| 1233 | goto succeed; |
Ido Shayevitz | 5a6506f | 2012-03-12 20:25:26 +0200 | [diff] [blame] | 1234 | if (!ep->ep.desc || ep->is_iso) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1235 | goto stall; |
| 1236 | if ((w_index & USB_DIR_IN)) { |
| 1237 | if (!ep->is_in) |
| 1238 | goto stall; |
| 1239 | } else if (ep->is_in) |
| 1240 | goto stall; |
| 1241 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1242 | at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask); |
| 1243 | at91_udp_write(udc, AT91_UDP_RST_EP, 0); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1244 | tmp = __raw_readl(ep->creg); |
| 1245 | tmp |= CLR_FX; |
| 1246 | tmp &= ~(SET_FX | AT91_UDP_FORCESTALL); |
| 1247 | __raw_writel(tmp, ep->creg); |
| 1248 | if (!list_empty(&ep->queue)) |
| 1249 | handle_ep(ep); |
| 1250 | goto succeed; |
| 1251 | } |
| 1252 | |
| 1253 | #undef w_value |
| 1254 | #undef w_index |
| 1255 | #undef w_length |
| 1256 | |
| 1257 | /* pass request up to the gadget driver */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1258 | if (udc->driver) { |
| 1259 | spin_unlock(&udc->lock); |
Wojtek Kaniewski | bfb7fb7 | 2006-12-08 03:26:00 -0800 | [diff] [blame] | 1260 | status = udc->driver->setup(&udc->gadget, &pkt.r); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1261 | spin_lock(&udc->lock); |
| 1262 | } |
Wojtek Kaniewski | bfb7fb7 | 2006-12-08 03:26:00 -0800 | [diff] [blame] | 1263 | else |
| 1264 | status = -ENODEV; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1265 | if (status < 0) { |
| 1266 | stall: |
| 1267 | VDBG("req %02x.%02x protocol STALL; stat %d\n", |
| 1268 | pkt.r.bRequestType, pkt.r.bRequest, status); |
| 1269 | csr |= AT91_UDP_FORCESTALL; |
| 1270 | __raw_writel(csr, creg); |
| 1271 | udc->req_pending = 0; |
| 1272 | } |
| 1273 | return; |
| 1274 | |
| 1275 | succeed: |
| 1276 | /* immediate successful (IN) STATUS after zero length DATA */ |
| 1277 | PACKET("ep0 in/status\n"); |
| 1278 | write_in: |
| 1279 | csr |= AT91_UDP_TXPKTRDY; |
| 1280 | __raw_writel(csr, creg); |
| 1281 | udc->req_pending = 0; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1282 | } |
| 1283 | |
| 1284 | static void handle_ep0(struct at91_udc *udc) |
| 1285 | { |
| 1286 | struct at91_ep *ep0 = &udc->ep[0]; |
| 1287 | u32 __iomem *creg = ep0->creg; |
| 1288 | u32 csr = __raw_readl(creg); |
| 1289 | struct at91_request *req; |
| 1290 | |
| 1291 | if (unlikely(csr & AT91_UDP_STALLSENT)) { |
| 1292 | nuke(ep0, -EPROTO); |
| 1293 | udc->req_pending = 0; |
| 1294 | csr |= CLR_FX; |
| 1295 | csr &= ~(SET_FX | AT91_UDP_STALLSENT | AT91_UDP_FORCESTALL); |
| 1296 | __raw_writel(csr, creg); |
| 1297 | VDBG("ep0 stalled\n"); |
| 1298 | csr = __raw_readl(creg); |
| 1299 | } |
| 1300 | if (csr & AT91_UDP_RXSETUP) { |
| 1301 | nuke(ep0, 0); |
| 1302 | udc->req_pending = 0; |
| 1303 | handle_setup(udc, ep0, csr); |
| 1304 | return; |
| 1305 | } |
| 1306 | |
| 1307 | if (list_empty(&ep0->queue)) |
| 1308 | req = NULL; |
| 1309 | else |
| 1310 | req = list_entry(ep0->queue.next, struct at91_request, queue); |
| 1311 | |
| 1312 | /* host ACKed an IN packet that we sent */ |
| 1313 | if (csr & AT91_UDP_TXCOMP) { |
| 1314 | csr |= CLR_FX; |
| 1315 | csr &= ~(SET_FX | AT91_UDP_TXCOMP); |
| 1316 | |
| 1317 | /* write more IN DATA? */ |
| 1318 | if (req && ep0->is_in) { |
| 1319 | if (handle_ep(ep0)) |
| 1320 | udc->req_pending = 0; |
| 1321 | |
| 1322 | /* |
| 1323 | * Ack after: |
| 1324 | * - last IN DATA packet (including GET_STATUS) |
| 1325 | * - IN/STATUS for OUT DATA |
| 1326 | * - IN/STATUS for any zero-length DATA stage |
| 1327 | * except for the IN DATA case, the host should send |
| 1328 | * an OUT status later, which we'll ack. |
| 1329 | */ |
| 1330 | } else { |
| 1331 | udc->req_pending = 0; |
| 1332 | __raw_writel(csr, creg); |
| 1333 | |
| 1334 | /* |
| 1335 | * SET_ADDRESS takes effect only after the STATUS |
| 1336 | * (to the original address) gets acked. |
| 1337 | */ |
| 1338 | if (udc->wait_for_addr_ack) { |
| 1339 | u32 tmp; |
| 1340 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1341 | at91_udp_write(udc, AT91_UDP_FADDR, |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1342 | AT91_UDP_FEN | udc->addr); |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1343 | tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1344 | tmp &= ~AT91_UDP_FADDEN; |
| 1345 | if (udc->addr) |
| 1346 | tmp |= AT91_UDP_FADDEN; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1347 | at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1348 | |
| 1349 | udc->wait_for_addr_ack = 0; |
| 1350 | VDBG("address %d\n", udc->addr); |
| 1351 | } |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | /* OUT packet arrived ... */ |
| 1356 | else if (csr & AT91_UDP_RX_DATA_BK0) { |
| 1357 | csr |= CLR_FX; |
| 1358 | csr &= ~(SET_FX | AT91_UDP_RX_DATA_BK0); |
| 1359 | |
| 1360 | /* OUT DATA stage */ |
| 1361 | if (!ep0->is_in) { |
| 1362 | if (req) { |
| 1363 | if (handle_ep(ep0)) { |
| 1364 | /* send IN/STATUS */ |
| 1365 | PACKET("ep0 in/status\n"); |
| 1366 | csr = __raw_readl(creg); |
| 1367 | csr &= ~SET_FX; |
| 1368 | csr |= CLR_FX | AT91_UDP_TXPKTRDY; |
| 1369 | __raw_writel(csr, creg); |
| 1370 | udc->req_pending = 0; |
| 1371 | } |
| 1372 | } else if (udc->req_pending) { |
| 1373 | /* |
| 1374 | * AT91 hardware has a hard time with this |
| 1375 | * "deferred response" mode for control-OUT |
| 1376 | * transfers. (For control-IN it's fine.) |
| 1377 | * |
| 1378 | * The normal solution leaves OUT data in the |
| 1379 | * fifo until the gadget driver is ready. |
| 1380 | * We couldn't do that here without disabling |
| 1381 | * the IRQ that tells about SETUP packets, |
| 1382 | * e.g. when the host gets impatient... |
| 1383 | * |
| 1384 | * Working around it by copying into a buffer |
| 1385 | * would almost be a non-deferred response, |
| 1386 | * except that it wouldn't permit reliable |
| 1387 | * stalling of the request. Instead, demand |
| 1388 | * that gadget drivers not use this mode. |
| 1389 | */ |
| 1390 | DBG("no control-OUT deferred responses!\n"); |
| 1391 | __raw_writel(csr | AT91_UDP_FORCESTALL, creg); |
| 1392 | udc->req_pending = 0; |
| 1393 | } |
| 1394 | |
| 1395 | /* STATUS stage for control-IN; ack. */ |
| 1396 | } else { |
| 1397 | PACKET("ep0 out/status ACK\n"); |
| 1398 | __raw_writel(csr, creg); |
| 1399 | |
| 1400 | /* "early" status stage */ |
| 1401 | if (req) |
| 1402 | done(ep0, req, 0); |
| 1403 | } |
| 1404 | } |
| 1405 | } |
| 1406 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1407 | static irqreturn_t at91_udc_irq (int irq, void *_udc) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1408 | { |
| 1409 | struct at91_udc *udc = _udc; |
| 1410 | u32 rescans = 5; |
Harro Haan | c6c3523 | 2010-03-01 17:38:37 +0100 | [diff] [blame] | 1411 | int disable_clock = 0; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1412 | unsigned long flags; |
| 1413 | |
| 1414 | spin_lock_irqsave(&udc->lock, flags); |
Harro Haan | c6c3523 | 2010-03-01 17:38:37 +0100 | [diff] [blame] | 1415 | |
| 1416 | if (!udc->clocked) { |
| 1417 | clk_on(udc); |
| 1418 | disable_clock = 1; |
| 1419 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1420 | |
| 1421 | while (rescans--) { |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1422 | u32 status; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1423 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1424 | status = at91_udp_read(udc, AT91_UDP_ISR) |
| 1425 | & at91_udp_read(udc, AT91_UDP_IMR); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1426 | if (!status) |
| 1427 | break; |
| 1428 | |
| 1429 | /* USB reset irq: not maskable */ |
| 1430 | if (status & AT91_UDP_ENDBUSRES) { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1431 | at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS); |
| 1432 | at91_udp_write(udc, AT91_UDP_IER, MINIMUS_INTERRUPTUS); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1433 | /* Atmel code clears this irq twice */ |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1434 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); |
| 1435 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1436 | VDBG("end bus reset\n"); |
| 1437 | udc->addr = 0; |
Peter Chen | 236e506 | 2014-11-06 14:28:02 +0800 | [diff] [blame] | 1438 | reset_gadget(udc); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1439 | |
| 1440 | /* enable ep0 */ |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1441 | at91_udp_write(udc, AT91_UDP_CSR(0), |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1442 | AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1443 | udc->gadget.speed = USB_SPEED_FULL; |
| 1444 | udc->suspended = 0; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1445 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_EP(0)); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1446 | |
| 1447 | /* |
| 1448 | * NOTE: this driver keeps clocks off unless the |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1449 | * USB host is present. That saves power, but for |
| 1450 | * boards that don't support VBUS detection, both |
| 1451 | * clocks need to be active most of the time. |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1452 | */ |
| 1453 | |
| 1454 | /* host initiated suspend (3+ms bus idle) */ |
| 1455 | } else if (status & AT91_UDP_RXSUSP) { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1456 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP); |
| 1457 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXRSM); |
| 1458 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP); |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 1459 | /* VDBG("bus suspend\n"); */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1460 | if (udc->suspended) |
| 1461 | continue; |
| 1462 | udc->suspended = 1; |
| 1463 | |
| 1464 | /* |
| 1465 | * NOTE: when suspending a VBUS-powered device, the |
| 1466 | * gadget driver should switch into slow clock mode |
| 1467 | * and then into standby to avoid drawing more than |
| 1468 | * 500uA power (2500uA for some high-power configs). |
| 1469 | */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1470 | if (udc->driver && udc->driver->suspend) { |
| 1471 | spin_unlock(&udc->lock); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1472 | udc->driver->suspend(&udc->gadget); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1473 | spin_lock(&udc->lock); |
| 1474 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1475 | |
| 1476 | /* host initiated resume */ |
| 1477 | } else if (status & AT91_UDP_RXRSM) { |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1478 | at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM); |
| 1479 | at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXSUSP); |
| 1480 | at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM); |
Robert Schwebel | 1a8060d | 2011-10-06 21:36:26 +0200 | [diff] [blame] | 1481 | /* VDBG("bus resume\n"); */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1482 | if (!udc->suspended) |
| 1483 | continue; |
| 1484 | udc->suspended = 0; |
| 1485 | |
| 1486 | /* |
| 1487 | * NOTE: for a VBUS-powered device, the gadget driver |
| 1488 | * would normally want to switch out of slow clock |
| 1489 | * mode into normal mode. |
| 1490 | */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1491 | if (udc->driver && udc->driver->resume) { |
| 1492 | spin_unlock(&udc->lock); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1493 | udc->driver->resume(&udc->gadget); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1494 | spin_lock(&udc->lock); |
| 1495 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1496 | |
| 1497 | /* endpoint IRQs are cleared by handling them */ |
| 1498 | } else { |
| 1499 | int i; |
| 1500 | unsigned mask = 1; |
| 1501 | struct at91_ep *ep = &udc->ep[1]; |
| 1502 | |
| 1503 | if (status & mask) |
| 1504 | handle_ep0(udc); |
| 1505 | for (i = 1; i < NUM_ENDPOINTS; i++) { |
| 1506 | mask <<= 1; |
| 1507 | if (status & mask) |
| 1508 | handle_ep(ep); |
| 1509 | ep++; |
| 1510 | } |
| 1511 | } |
| 1512 | } |
| 1513 | |
Harro Haan | c6c3523 | 2010-03-01 17:38:37 +0100 | [diff] [blame] | 1514 | if (disable_clock) |
| 1515 | clk_off(udc); |
| 1516 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1517 | spin_unlock_irqrestore(&udc->lock, flags); |
| 1518 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1519 | return IRQ_HANDLED; |
| 1520 | } |
| 1521 | |
| 1522 | /*-------------------------------------------------------------------------*/ |
| 1523 | |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1524 | static void at91_vbus_update(struct at91_udc *udc, unsigned value) |
| 1525 | { |
| 1526 | value ^= udc->board.vbus_active_low; |
| 1527 | if (value != udc->vbus) |
| 1528 | at91_vbus_session(&udc->gadget, value); |
| 1529 | } |
| 1530 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1531 | static irqreturn_t at91_vbus_irq(int irq, void *_udc) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1532 | { |
| 1533 | struct at91_udc *udc = _udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1534 | |
| 1535 | /* vbus needs at least brief debouncing */ |
| 1536 | udelay(10); |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1537 | at91_vbus_update(udc, gpio_get_value(udc->board.vbus_pin)); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1538 | |
| 1539 | return IRQ_HANDLED; |
| 1540 | } |
| 1541 | |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1542 | static void at91_vbus_timer_work(struct work_struct *work) |
| 1543 | { |
| 1544 | struct at91_udc *udc = container_of(work, struct at91_udc, |
| 1545 | vbus_timer_work); |
| 1546 | |
| 1547 | at91_vbus_update(udc, gpio_get_value_cansleep(udc->board.vbus_pin)); |
| 1548 | |
| 1549 | if (!timer_pending(&udc->vbus_timer)) |
| 1550 | mod_timer(&udc->vbus_timer, jiffies + VBUS_POLL_TIMEOUT); |
| 1551 | } |
| 1552 | |
Kees Cook | e99e88a | 2017-10-16 14:43:17 -0700 | [diff] [blame] | 1553 | static void at91_vbus_timer(struct timer_list *t) |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1554 | { |
Kees Cook | e99e88a | 2017-10-16 14:43:17 -0700 | [diff] [blame] | 1555 | struct at91_udc *udc = from_timer(udc, t, vbus_timer); |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1556 | |
| 1557 | /* |
| 1558 | * If we are polling vbus it is likely that the gpio is on an |
| 1559 | * bus such as i2c or spi which may sleep, so schedule some work |
| 1560 | * to read the vbus gpio |
| 1561 | */ |
Tejun Heo | 348409a | 2012-12-21 17:57:12 -0800 | [diff] [blame] | 1562 | schedule_work(&udc->vbus_timer_work); |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1563 | } |
| 1564 | |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1565 | static int at91_start(struct usb_gadget *gadget, |
| 1566 | struct usb_gadget_driver *driver) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1567 | { |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1568 | struct at91_udc *udc; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1569 | |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1570 | udc = container_of(gadget, struct at91_udc, gadget); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1571 | udc->driver = driver; |
Alexandre Pereira da Silva | 65c84ea | 2012-06-26 11:27:12 -0300 | [diff] [blame] | 1572 | udc->gadget.dev.of_node = udc->pdev->dev.of_node; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1573 | udc->enabled = 1; |
Peter Chen | 7301971 | 2015-01-28 16:32:26 +0800 | [diff] [blame] | 1574 | udc->gadget.is_selfpowered = 1; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1575 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1576 | return 0; |
| 1577 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1578 | |
Felipe Balbi | 22835b8 | 2014-10-17 12:05:12 -0500 | [diff] [blame] | 1579 | static int at91_stop(struct usb_gadget *gadget) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1580 | { |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1581 | struct at91_udc *udc; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1582 | unsigned long flags; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1583 | |
Sebastian Andrzej Siewior | f3d8bf3 | 2012-02-04 18:55:23 +0100 | [diff] [blame] | 1584 | udc = container_of(gadget, struct at91_udc, gadget); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1585 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1586 | udc->enabled = 0; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1587 | at91_udp_write(udc, AT91_UDP_IDR, ~0); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1588 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1589 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1590 | udc->driver = NULL; |
| 1591 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1592 | return 0; |
| 1593 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1594 | |
| 1595 | /*-------------------------------------------------------------------------*/ |
| 1596 | |
| 1597 | static void at91udc_shutdown(struct platform_device *dev) |
| 1598 | { |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1599 | struct at91_udc *udc = platform_get_drvdata(dev); |
| 1600 | unsigned long flags; |
| 1601 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1602 | /* force disconnect on reboot */ |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1603 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1604 | pullup(platform_get_drvdata(dev), 0); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1605 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1606 | } |
| 1607 | |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1608 | static int at91rm9200_udc_init(struct at91_udc *udc) |
| 1609 | { |
| 1610 | struct at91_ep *ep; |
| 1611 | int ret; |
| 1612 | int i; |
| 1613 | |
| 1614 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 1615 | ep = &udc->ep[i]; |
| 1616 | |
| 1617 | switch (i) { |
| 1618 | case 0: |
| 1619 | case 3: |
| 1620 | ep->maxpacket = 8; |
| 1621 | break; |
| 1622 | case 1 ... 2: |
| 1623 | ep->maxpacket = 64; |
| 1624 | break; |
| 1625 | case 4 ... 5: |
| 1626 | ep->maxpacket = 256; |
| 1627 | break; |
| 1628 | } |
| 1629 | } |
| 1630 | |
| 1631 | if (!gpio_is_valid(udc->board.pullup_pin)) { |
| 1632 | DBG("no D+ pullup?\n"); |
| 1633 | return -ENODEV; |
| 1634 | } |
| 1635 | |
| 1636 | ret = devm_gpio_request(&udc->pdev->dev, udc->board.pullup_pin, |
| 1637 | "udc_pullup"); |
| 1638 | if (ret) { |
| 1639 | DBG("D+ pullup is busy\n"); |
| 1640 | return ret; |
| 1641 | } |
| 1642 | |
| 1643 | gpio_direction_output(udc->board.pullup_pin, |
| 1644 | udc->board.pullup_active_low); |
| 1645 | |
| 1646 | return 0; |
| 1647 | } |
| 1648 | |
| 1649 | static void at91rm9200_udc_pullup(struct at91_udc *udc, int is_on) |
| 1650 | { |
| 1651 | int active = !udc->board.pullup_active_low; |
| 1652 | |
| 1653 | if (is_on) |
| 1654 | gpio_set_value(udc->board.pullup_pin, active); |
| 1655 | else |
| 1656 | gpio_set_value(udc->board.pullup_pin, !active); |
| 1657 | } |
| 1658 | |
| 1659 | static const struct at91_udc_caps at91rm9200_udc_caps = { |
| 1660 | .init = at91rm9200_udc_init, |
| 1661 | .pullup = at91rm9200_udc_pullup, |
| 1662 | }; |
| 1663 | |
| 1664 | static int at91sam9260_udc_init(struct at91_udc *udc) |
| 1665 | { |
| 1666 | struct at91_ep *ep; |
| 1667 | int i; |
| 1668 | |
| 1669 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 1670 | ep = &udc->ep[i]; |
| 1671 | |
| 1672 | switch (i) { |
| 1673 | case 0 ... 3: |
| 1674 | ep->maxpacket = 64; |
| 1675 | break; |
| 1676 | case 4 ... 5: |
| 1677 | ep->maxpacket = 512; |
| 1678 | break; |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | static void at91sam9260_udc_pullup(struct at91_udc *udc, int is_on) |
| 1686 | { |
| 1687 | u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC); |
| 1688 | |
| 1689 | if (is_on) |
| 1690 | txvc |= AT91_UDP_TXVC_PUON; |
| 1691 | else |
| 1692 | txvc &= ~AT91_UDP_TXVC_PUON; |
| 1693 | |
| 1694 | at91_udp_write(udc, AT91_UDP_TXVC, txvc); |
| 1695 | } |
| 1696 | |
| 1697 | static const struct at91_udc_caps at91sam9260_udc_caps = { |
| 1698 | .init = at91sam9260_udc_init, |
| 1699 | .pullup = at91sam9260_udc_pullup, |
| 1700 | }; |
| 1701 | |
| 1702 | static int at91sam9261_udc_init(struct at91_udc *udc) |
| 1703 | { |
| 1704 | struct at91_ep *ep; |
| 1705 | int i; |
| 1706 | |
| 1707 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 1708 | ep = &udc->ep[i]; |
| 1709 | |
| 1710 | switch (i) { |
| 1711 | case 0: |
| 1712 | ep->maxpacket = 8; |
| 1713 | break; |
| 1714 | case 1 ... 3: |
| 1715 | ep->maxpacket = 64; |
| 1716 | break; |
| 1717 | case 4 ... 5: |
| 1718 | ep->maxpacket = 256; |
| 1719 | break; |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | udc->matrix = syscon_regmap_lookup_by_phandle(udc->pdev->dev.of_node, |
| 1724 | "atmel,matrix"); |
Felipe Balbi | 46cdd19 | 2016-03-29 12:26:06 +0300 | [diff] [blame] | 1725 | return PTR_ERR_OR_ZERO(udc->matrix); |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | static void at91sam9261_udc_pullup(struct at91_udc *udc, int is_on) |
| 1729 | { |
| 1730 | u32 usbpucr = 0; |
| 1731 | |
| 1732 | if (is_on) |
| 1733 | usbpucr = AT91_MATRIX_USBPUCR_PUON; |
| 1734 | |
| 1735 | regmap_update_bits(udc->matrix, AT91SAM9261_MATRIX_USBPUCR, |
| 1736 | AT91_MATRIX_USBPUCR_PUON, usbpucr); |
| 1737 | } |
| 1738 | |
| 1739 | static const struct at91_udc_caps at91sam9261_udc_caps = { |
| 1740 | .init = at91sam9261_udc_init, |
| 1741 | .pullup = at91sam9261_udc_pullup, |
| 1742 | }; |
| 1743 | |
| 1744 | static int at91sam9263_udc_init(struct at91_udc *udc) |
| 1745 | { |
| 1746 | struct at91_ep *ep; |
| 1747 | int i; |
| 1748 | |
| 1749 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 1750 | ep = &udc->ep[i]; |
| 1751 | |
| 1752 | switch (i) { |
| 1753 | case 0: |
| 1754 | case 1: |
| 1755 | case 2: |
| 1756 | case 3: |
| 1757 | ep->maxpacket = 64; |
| 1758 | break; |
| 1759 | case 4: |
| 1760 | case 5: |
| 1761 | ep->maxpacket = 256; |
| 1762 | break; |
| 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | return 0; |
| 1767 | } |
| 1768 | |
| 1769 | static const struct at91_udc_caps at91sam9263_udc_caps = { |
| 1770 | .init = at91sam9263_udc_init, |
| 1771 | .pullup = at91sam9260_udc_pullup, |
| 1772 | }; |
| 1773 | |
| 1774 | static const struct of_device_id at91_udc_dt_ids[] = { |
| 1775 | { |
| 1776 | .compatible = "atmel,at91rm9200-udc", |
| 1777 | .data = &at91rm9200_udc_caps, |
| 1778 | }, |
| 1779 | { |
| 1780 | .compatible = "atmel,at91sam9260-udc", |
| 1781 | .data = &at91sam9260_udc_caps, |
| 1782 | }, |
| 1783 | { |
| 1784 | .compatible = "atmel,at91sam9261-udc", |
| 1785 | .data = &at91sam9261_udc_caps, |
| 1786 | }, |
| 1787 | { |
| 1788 | .compatible = "atmel,at91sam9263-udc", |
| 1789 | .data = &at91sam9263_udc_caps, |
| 1790 | }, |
| 1791 | { /* sentinel */ } |
| 1792 | }; |
| 1793 | MODULE_DEVICE_TABLE(of, at91_udc_dt_ids); |
| 1794 | |
| 1795 | static void at91udc_of_init(struct at91_udc *udc, struct device_node *np) |
Jean-Christophe PLAGNIOL-VILLARD | d1494a3 | 2012-01-28 22:35:36 +0800 | [diff] [blame] | 1796 | { |
| 1797 | struct at91_udc_data *board = &udc->board; |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1798 | const struct of_device_id *match; |
Jean-Christophe PLAGNIOL-VILLARD | d1494a3 | 2012-01-28 22:35:36 +0800 | [diff] [blame] | 1799 | enum of_gpio_flags flags; |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1800 | u32 val; |
Jean-Christophe PLAGNIOL-VILLARD | d1494a3 | 2012-01-28 22:35:36 +0800 | [diff] [blame] | 1801 | |
| 1802 | if (of_property_read_u32(np, "atmel,vbus-polled", &val) == 0) |
| 1803 | board->vbus_polled = 1; |
| 1804 | |
| 1805 | board->vbus_pin = of_get_named_gpio_flags(np, "atmel,vbus-gpio", 0, |
| 1806 | &flags); |
| 1807 | board->vbus_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; |
| 1808 | |
| 1809 | board->pullup_pin = of_get_named_gpio_flags(np, "atmel,pullup-gpio", 0, |
| 1810 | &flags); |
| 1811 | |
| 1812 | board->pullup_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0; |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1813 | |
| 1814 | match = of_match_node(at91_udc_dt_ids, np); |
| 1815 | if (match) |
| 1816 | udc->caps = match->data; |
Jean-Christophe PLAGNIOL-VILLARD | d1494a3 | 2012-01-28 22:35:36 +0800 | [diff] [blame] | 1817 | } |
| 1818 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 1819 | static int at91udc_probe(struct platform_device *pdev) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1820 | { |
| 1821 | struct device *dev = &pdev->dev; |
| 1822 | struct at91_udc *udc; |
| 1823 | int retval; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1824 | struct resource *res; |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1825 | struct at91_ep *ep; |
| 1826 | int i; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1827 | |
Boris Brezillon | a5514d14 | 2015-01-14 17:22:04 +0100 | [diff] [blame] | 1828 | udc = devm_kzalloc(dev, sizeof(*udc), GFP_KERNEL); |
| 1829 | if (!udc) |
| 1830 | return -ENOMEM; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1831 | |
| 1832 | /* init software state */ |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1833 | udc->gadget.dev.parent = dev; |
Boris Brezillon | 9f00fc1 | 2015-01-14 17:22:00 +0100 | [diff] [blame] | 1834 | at91udc_of_init(udc, pdev->dev.of_node); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1835 | udc->pdev = pdev; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1836 | udc->enabled = 0; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1837 | spin_lock_init(&udc->lock); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1838 | |
Boris Brezillon | a5514d14 | 2015-01-14 17:22:04 +0100 | [diff] [blame] | 1839 | udc->gadget.ops = &at91_udc_ops; |
| 1840 | udc->gadget.ep0 = &udc->ep[0].ep; |
| 1841 | udc->gadget.name = driver_name; |
| 1842 | udc->gadget.dev.init_name = "gadget"; |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 1843 | |
Boris Brezillon | a5514d14 | 2015-01-14 17:22:04 +0100 | [diff] [blame] | 1844 | for (i = 0; i < NUM_ENDPOINTS; i++) { |
| 1845 | ep = &udc->ep[i]; |
Robert Baldyga | b9ed96d7 | 2015-07-31 16:00:21 +0200 | [diff] [blame] | 1846 | ep->ep.name = ep_info[i].name; |
| 1847 | ep->ep.caps = ep_info[i].caps; |
Boris Brezillon | a5514d14 | 2015-01-14 17:22:04 +0100 | [diff] [blame] | 1848 | ep->ep.ops = &at91_ep_ops; |
| 1849 | ep->udc = udc; |
| 1850 | ep->int_mask = BIT(i); |
| 1851 | if (i != 0 && i != 3) |
| 1852 | ep->is_pingpong = 1; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1853 | } |
| 1854 | |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1855 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1856 | udc->udp_baseaddr = devm_ioremap_resource(dev, res); |
| 1857 | if (IS_ERR(udc->udp_baseaddr)) |
| 1858 | return PTR_ERR(udc->udp_baseaddr); |
David Brownell | bb24280 | 2008-05-27 19:24:20 -0700 | [diff] [blame] | 1859 | |
Boris Brezillon | f0bceab | 2015-01-14 17:22:02 +0100 | [diff] [blame] | 1860 | if (udc->caps && udc->caps->init) { |
| 1861 | retval = udc->caps->init(udc); |
| 1862 | if (retval) |
| 1863 | return retval; |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1864 | } |
| 1865 | |
| 1866 | udc_reinit(udc); |
| 1867 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1868 | /* get interface and function clocks */ |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1869 | udc->iclk = devm_clk_get(dev, "pclk"); |
| 1870 | if (IS_ERR(udc->iclk)) |
| 1871 | return PTR_ERR(udc->iclk); |
| 1872 | |
| 1873 | udc->fclk = devm_clk_get(dev, "hclk"); |
| 1874 | if (IS_ERR(udc->fclk)) |
| 1875 | return PTR_ERR(udc->fclk); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1876 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1877 | /* don't do anything until we have both gadget driver and VBUS */ |
Boris Brezillon | 9aa0216 | 2015-01-14 17:21:58 +0100 | [diff] [blame] | 1878 | clk_set_rate(udc->fclk, 48000000); |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1879 | retval = clk_prepare(udc->fclk); |
| 1880 | if (retval) |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1881 | return retval; |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1882 | |
Boris BREZILLON | 7628083 | 2013-06-25 10:12:56 +0200 | [diff] [blame] | 1883 | retval = clk_prepare_enable(udc->iclk); |
| 1884 | if (retval) |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1885 | goto err_unprepare_fclk; |
| 1886 | |
Andrew Victor | ffd3326 | 2006-12-07 22:44:33 -0800 | [diff] [blame] | 1887 | at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS); |
| 1888 | at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff); |
Andrew Victor | 29ba4b5 | 2006-12-07 22:44:38 -0800 | [diff] [blame] | 1889 | /* Clear all pending interrupts - UDP may be used by bootloader. */ |
| 1890 | at91_udp_write(udc, AT91_UDP_ICR, 0xffffffff); |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1891 | clk_disable(udc->iclk); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1892 | |
| 1893 | /* request UDC and maybe VBUS irqs */ |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1894 | udc->udp_irq = platform_get_irq(pdev, 0); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1895 | retval = devm_request_irq(dev, udc->udp_irq, at91_udc_irq, 0, |
| 1896 | driver_name, udc); |
| 1897 | if (retval) { |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1898 | DBG("request irq %d failed\n", udc->udp_irq); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1899 | goto err_unprepare_iclk; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1900 | } |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1901 | |
Jean-Christophe PLAGNIOL-VILLARD | 3285e0e | 2011-09-19 15:31:58 +0800 | [diff] [blame] | 1902 | if (gpio_is_valid(udc->board.vbus_pin)) { |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1903 | retval = devm_gpio_request(dev, udc->board.vbus_pin, |
| 1904 | "udc_vbus"); |
| 1905 | if (retval) { |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 1906 | DBG("request vbus pin failed\n"); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1907 | goto err_unprepare_iclk; |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 1908 | } |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1909 | |
David Brownell | f3db6e8 | 2008-01-05 13:21:43 -0800 | [diff] [blame] | 1910 | gpio_direction_input(udc->board.vbus_pin); |
| 1911 | |
Andrew Victor | 29ba4b5 | 2006-12-07 22:44:38 -0800 | [diff] [blame] | 1912 | /* |
| 1913 | * Get the initial state of VBUS - we cannot expect |
| 1914 | * a pending interrupt. |
| 1915 | */ |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1916 | udc->vbus = gpio_get_value_cansleep(udc->board.vbus_pin) ^ |
| 1917 | udc->board.vbus_active_low; |
| 1918 | |
| 1919 | if (udc->board.vbus_polled) { |
| 1920 | INIT_WORK(&udc->vbus_timer_work, at91_vbus_timer_work); |
Kees Cook | e99e88a | 2017-10-16 14:43:17 -0700 | [diff] [blame] | 1921 | timer_setup(&udc->vbus_timer, at91_vbus_timer, 0); |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1922 | mod_timer(&udc->vbus_timer, |
| 1923 | jiffies + VBUS_POLL_TIMEOUT); |
| 1924 | } else { |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1925 | retval = devm_request_irq(dev, |
| 1926 | gpio_to_irq(udc->board.vbus_pin), |
| 1927 | at91_vbus_irq, 0, driver_name, udc); |
| 1928 | if (retval) { |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1929 | DBG("request vbus irq %d failed\n", |
| 1930 | udc->board.vbus_pin); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1931 | goto err_unprepare_iclk; |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 1932 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1933 | } |
| 1934 | } else { |
| 1935 | DBG("no VBUS detection, assuming always-on\n"); |
| 1936 | udc->vbus = 1; |
| 1937 | } |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1938 | retval = usb_add_gadget_udc(dev, &udc->gadget); |
| 1939 | if (retval) |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1940 | goto err_unprepare_iclk; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1941 | dev_set_drvdata(dev, udc); |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1942 | device_init_wakeup(dev, 1); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1943 | create_debug_file(udc); |
| 1944 | |
| 1945 | INFO("%s version %s\n", driver_name, DRIVER_VERSION); |
| 1946 | return 0; |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1947 | |
| 1948 | err_unprepare_iclk: |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1949 | clk_unprepare(udc->iclk); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1950 | err_unprepare_fclk: |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1951 | clk_unprepare(udc->fclk); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1952 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1953 | DBG("%s probe failed, %d\n", driver_name, retval); |
Boris Brezillon | 422cde2 | 2015-01-14 17:22:01 +0100 | [diff] [blame] | 1954 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1955 | return retval; |
| 1956 | } |
| 1957 | |
Arnd Bergmann | c94e289 | 2015-04-11 00:14:21 +0200 | [diff] [blame] | 1958 | static int at91udc_remove(struct platform_device *pdev) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1959 | { |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1960 | struct at91_udc *udc = platform_get_drvdata(pdev); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1961 | unsigned long flags; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1962 | |
| 1963 | DBG("remove\n"); |
| 1964 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1965 | usb_del_gadget_udc(&udc->gadget); |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 1966 | if (udc->driver) |
| 1967 | return -EBUSY; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1968 | |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1969 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | 6bea476 | 2006-12-05 03:15:33 -0800 | [diff] [blame] | 1970 | pullup(udc, 0); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1971 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1972 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1973 | device_init_wakeup(&pdev->dev, 0); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1974 | remove_debug_file(udc); |
Ronald Wahl | b2ba27a | 2014-11-19 16:37:27 +0100 | [diff] [blame] | 1975 | clk_unprepare(udc->fclk); |
| 1976 | clk_unprepare(udc->iclk); |
| 1977 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1978 | return 0; |
| 1979 | } |
| 1980 | |
| 1981 | #ifdef CONFIG_PM |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1982 | static int at91udc_suspend(struct platform_device *pdev, pm_message_t mesg) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1983 | { |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1984 | struct at91_udc *udc = platform_get_drvdata(pdev); |
| 1985 | int wake = udc->driver && device_may_wakeup(&pdev->dev); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1986 | unsigned long flags; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1987 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1988 | /* Unless we can act normally to the host (letting it wake us up |
| 1989 | * whenever it has work for us) force disconnect. Wakeup requires |
| 1990 | * PLLB for USB events (signaling for reset, wakeup, or incoming |
| 1991 | * tokens) and VBUS irqs (on systems which support them). |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1992 | */ |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 1993 | if ((!udc->suspended && udc->addr) |
| 1994 | || !wake |
| 1995 | || at91_suspend_entering_slow_clock()) { |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1996 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 1997 | pullup(udc, 0); |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 1998 | wake = 0; |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 1999 | spin_unlock_irqrestore(&udc->lock, flags); |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 2000 | } else |
| 2001 | enable_irq_wake(udc->udp_irq); |
| 2002 | |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 2003 | udc->active_suspend = wake; |
Jean-Christophe PLAGNIOL-VILLARD | 3285e0e | 2011-09-19 15:31:58 +0800 | [diff] [blame] | 2004 | if (gpio_is_valid(udc->board.vbus_pin) && !udc->board.vbus_polled && wake) |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 2005 | enable_irq_wake(udc->board.vbus_pin); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2006 | return 0; |
| 2007 | } |
| 2008 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 2009 | static int at91udc_resume(struct platform_device *pdev) |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2010 | { |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 2011 | struct at91_udc *udc = platform_get_drvdata(pdev); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 2012 | unsigned long flags; |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2013 | |
Jean-Christophe PLAGNIOL-VILLARD | 3285e0e | 2011-09-19 15:31:58 +0800 | [diff] [blame] | 2014 | if (gpio_is_valid(udc->board.vbus_pin) && !udc->board.vbus_polled && |
Ryan Mallon | 4037242 | 2010-07-13 05:09:16 +0100 | [diff] [blame] | 2015 | udc->active_suspend) |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 2016 | disable_irq_wake(udc->board.vbus_pin); |
| 2017 | |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2018 | /* maybe reconnect to host; if so, clocks on */ |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 2019 | if (udc->active_suspend) |
| 2020 | disable_irq_wake(udc->udp_irq); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 2021 | else { |
| 2022 | spin_lock_irqsave(&udc->lock, flags); |
David Brownell | 66e56ce | 2007-01-16 12:46:39 -0800 | [diff] [blame] | 2023 | pullup(udc, 1); |
Harro Haan | 4f4c5e3 | 2010-03-01 18:01:56 +0100 | [diff] [blame] | 2024 | spin_unlock_irqrestore(&udc->lock, flags); |
| 2025 | } |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2026 | return 0; |
| 2027 | } |
| 2028 | #else |
| 2029 | #define at91udc_suspend NULL |
| 2030 | #define at91udc_resume NULL |
| 2031 | #endif |
| 2032 | |
David Brownell | dee497d | 2007-02-24 13:54:56 -0800 | [diff] [blame] | 2033 | static struct platform_driver at91_udc_driver = { |
Arnd Bergmann | c94e289 | 2015-04-11 00:14:21 +0200 | [diff] [blame] | 2034 | .remove = at91udc_remove, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2035 | .shutdown = at91udc_shutdown, |
| 2036 | .suspend = at91udc_suspend, |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 2037 | .resume = at91udc_resume, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2038 | .driver = { |
| 2039 | .name = (char *) driver_name, |
Boris Brezillon | 9f00fc1 | 2015-01-14 17:22:00 +0100 | [diff] [blame] | 2040 | .of_match_table = at91_udc_dt_ids, |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2041 | }, |
| 2042 | }; |
| 2043 | |
Fabio Porcedda | 52f7a82 | 2013-01-09 12:15:28 +0100 | [diff] [blame] | 2044 | module_platform_driver_probe(at91_udc_driver, at91udc_probe); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2045 | |
David Brownell | 8b2e766 | 2006-07-05 02:38:56 -0700 | [diff] [blame] | 2046 | MODULE_DESCRIPTION("AT91 udc driver"); |
David Brownell | bae4bd8 | 2006-01-22 10:32:37 -0800 | [diff] [blame] | 2047 | MODULE_AUTHOR("Thomas Rathbone, David Brownell"); |
| 2048 | MODULE_LICENSE("GPL"); |
Kay Sievers | f34c32f | 2008-04-10 21:29:21 -0700 | [diff] [blame] | 2049 | MODULE_ALIAS("platform:at91_udc"); |