Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NetChip 2280 high/full speed USB device controller. | |
3 | * Unlike many such controllers, this one talks PCI. | |
4 | */ | |
5 | ||
6 | /* | |
7 | * Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com) | |
8 | * Copyright (C) 2003 David Brownell | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | */ | |
24 | ||
9fc4831c | 25 | #include <linux/usb/net2280.h> |
1da177e4 LT |
26 | |
27 | /*-------------------------------------------------------------------------*/ | |
28 | ||
29 | #ifdef __KERNEL__ | |
30 | ||
31 | /* indexed registers [11.10] are accessed indirectly | |
32 | * caller must own the device lock. | |
33 | */ | |
34 | ||
35 | static inline u32 | |
36 | get_idx_reg (struct net2280_regs __iomem *regs, u32 index) | |
37 | { | |
38 | writel (index, ®s->idxaddr); | |
39 | /* NOTE: synchs device/cpu memory views */ | |
40 | return readl (®s->idxdata); | |
41 | } | |
42 | ||
43 | static inline void | |
44 | set_idx_reg (struct net2280_regs __iomem *regs, u32 index, u32 value) | |
45 | { | |
46 | writel (index, ®s->idxaddr); | |
47 | writel (value, ®s->idxdata); | |
48 | /* posted, may not be visible yet */ | |
49 | } | |
50 | ||
51 | #endif /* __KERNEL__ */ | |
52 | ||
53 | ||
54 | #define REG_DIAG 0x0 | |
55 | #define RETRY_COUNTER 16 | |
56 | #define FORCE_PCI_SERR 11 | |
57 | #define FORCE_PCI_INTERRUPT 10 | |
58 | #define FORCE_USB_INTERRUPT 9 | |
59 | #define FORCE_CPU_INTERRUPT 8 | |
60 | #define ILLEGAL_BYTE_ENABLES 5 | |
61 | #define FAST_TIMES 4 | |
62 | #define FORCE_RECEIVE_ERROR 2 | |
63 | #define FORCE_TRANSMIT_CRC_ERROR 0 | |
64 | #define REG_FRAME 0x02 /* from last sof */ | |
65 | #define REG_CHIPREV 0x03 /* in bcd */ | |
66 | #define REG_HS_NAK_RATE 0x0a /* NAK per N uframes */ | |
67 | ||
68 | #define CHIPREV_1 0x0100 | |
69 | #define CHIPREV_1A 0x0110 | |
70 | ||
71 | #ifdef __KERNEL__ | |
72 | ||
73 | /* ep a-f highspeed and fullspeed maxpacket, addresses | |
74 | * computed from ep->num | |
75 | */ | |
76 | #define REG_EP_MAXPKT(dev,num) (((num) + 1) * 0x10 + \ | |
77 | (((dev)->gadget.speed == USB_SPEED_HIGH) ? 0 : 1)) | |
78 | ||
79 | /*-------------------------------------------------------------------------*/ | |
80 | ||
81 | /* [8.3] for scatter/gather i/o | |
82 | * use struct net2280_dma_regs bitfields | |
83 | */ | |
84 | struct net2280_dma { | |
85 | __le32 dmacount; | |
86 | __le32 dmaaddr; /* the buffer */ | |
87 | __le32 dmadesc; /* next dma descriptor */ | |
88 | __le32 _reserved; | |
89 | } __attribute__ ((aligned (16))); | |
90 | ||
91 | /*-------------------------------------------------------------------------*/ | |
92 | ||
93 | /* DRIVER DATA STRUCTURES and UTILITIES */ | |
94 | ||
95 | struct net2280_ep { | |
96 | struct usb_ep ep; | |
97 | struct net2280_ep_regs __iomem *regs; | |
98 | struct net2280_dma_regs __iomem *dma; | |
99 | struct net2280_dma *dummy; | |
100 | dma_addr_t td_dma; /* of dummy */ | |
101 | struct net2280 *dev; | |
102 | unsigned long irqs; | |
103 | ||
104 | /* analogous to a host-side qh */ | |
105 | struct list_head queue; | |
106 | const struct usb_endpoint_descriptor *desc; | |
107 | unsigned num : 8, | |
108 | fifo_size : 12, | |
109 | in_fifo_validate : 1, | |
110 | out_overflow : 1, | |
111 | stopped : 1, | |
8066134f | 112 | wedged : 1, |
1da177e4 | 113 | is_in : 1, |
1f26e28d AS |
114 | is_iso : 1, |
115 | responded : 1; | |
1da177e4 LT |
116 | }; |
117 | ||
118 | static inline void allow_status (struct net2280_ep *ep) | |
119 | { | |
120 | /* ep0 only */ | |
121 | writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) | |
122 | | (1 << CLEAR_NAK_OUT_PACKETS) | |
123 | | (1 << CLEAR_NAK_OUT_PACKETS_MODE) | |
124 | , &ep->regs->ep_rsp); | |
125 | ep->stopped = 1; | |
126 | } | |
127 | ||
128 | /* count (<= 4) bytes in the next fifo write will be valid */ | |
129 | static inline void set_fifo_bytecount (struct net2280_ep *ep, unsigned count) | |
130 | { | |
131 | writeb (count, 2 + (u8 __iomem *) &ep->regs->ep_cfg); | |
132 | } | |
133 | ||
134 | struct net2280_request { | |
135 | struct usb_request req; | |
136 | struct net2280_dma *td; | |
137 | dma_addr_t td_dma; | |
138 | struct list_head queue; | |
139 | unsigned mapped : 1, | |
140 | valid : 1; | |
141 | }; | |
142 | ||
143 | struct net2280 { | |
144 | /* each pci device provides one gadget, several endpoints */ | |
145 | struct usb_gadget gadget; | |
146 | spinlock_t lock; | |
147 | struct net2280_ep ep [7]; | |
148 | struct usb_gadget_driver *driver; | |
149 | unsigned enabled : 1, | |
150 | protocol_stall : 1, | |
151 | softconnect : 1, | |
152 | got_irq : 1, | |
153 | region : 1; | |
154 | u16 chiprev; | |
155 | ||
156 | /* pci state used to access those endpoints */ | |
157 | struct pci_dev *pdev; | |
158 | struct net2280_regs __iomem *regs; | |
159 | struct net2280_usb_regs __iomem *usb; | |
160 | struct net2280_pci_regs __iomem *pci; | |
161 | struct net2280_dma_regs __iomem *dma; | |
162 | struct net2280_dep_regs __iomem *dep; | |
163 | struct net2280_ep_regs __iomem *epregs; | |
164 | ||
165 | struct pci_pool *requests; | |
166 | // statistics... | |
167 | }; | |
168 | ||
169 | static inline void set_halt (struct net2280_ep *ep) | |
170 | { | |
171 | /* ep0 and bulk/intr endpoints */ | |
172 | writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) | |
173 | /* set NAK_OUT for erratum 0114 */ | |
174 | | ((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS) | |
175 | | (1 << SET_ENDPOINT_HALT) | |
176 | , &ep->regs->ep_rsp); | |
177 | } | |
178 | ||
179 | static inline void clear_halt (struct net2280_ep *ep) | |
180 | { | |
181 | /* ep0 and bulk/intr endpoints */ | |
182 | writel ( (1 << CLEAR_ENDPOINT_HALT) | |
183 | | (1 << CLEAR_ENDPOINT_TOGGLE) | |
184 | /* unless the gadget driver left a short packet in the | |
185 | * fifo, this reverses the erratum 0114 workaround. | |
186 | */ | |
187 | | ((ep->dev->chiprev == CHIPREV_1) << CLEAR_NAK_OUT_PACKETS) | |
188 | , &ep->regs->ep_rsp); | |
189 | } | |
190 | ||
191 | #ifdef USE_RDK_LEDS | |
192 | ||
193 | static inline void net2280_led_init (struct net2280 *dev) | |
194 | { | |
195 | /* LED3 (green) is on during USB activity. note erratum 0113. */ | |
196 | writel ((1 << GPIO3_LED_SELECT) | |
197 | | (1 << GPIO3_OUTPUT_ENABLE) | |
198 | | (1 << GPIO2_OUTPUT_ENABLE) | |
199 | | (1 << GPIO1_OUTPUT_ENABLE) | |
200 | | (1 << GPIO0_OUTPUT_ENABLE) | |
201 | , &dev->regs->gpioctl); | |
202 | } | |
203 | ||
204 | /* indicate speed with bi-color LED 0/1 */ | |
205 | static inline | |
206 | void net2280_led_speed (struct net2280 *dev, enum usb_device_speed speed) | |
207 | { | |
208 | u32 val = readl (&dev->regs->gpioctl); | |
209 | switch (speed) { | |
210 | case USB_SPEED_HIGH: /* green */ | |
211 | val &= ~(1 << GPIO0_DATA); | |
212 | val |= (1 << GPIO1_DATA); | |
213 | break; | |
214 | case USB_SPEED_FULL: /* red */ | |
215 | val &= ~(1 << GPIO1_DATA); | |
216 | val |= (1 << GPIO0_DATA); | |
217 | break; | |
218 | default: /* (off/black) */ | |
219 | val &= ~((1 << GPIO1_DATA) | (1 << GPIO0_DATA)); | |
220 | break; | |
221 | } | |
222 | writel (val, &dev->regs->gpioctl); | |
223 | } | |
224 | ||
225 | /* indicate power with LED 2 */ | |
226 | static inline void net2280_led_active (struct net2280 *dev, int is_active) | |
227 | { | |
228 | u32 val = readl (&dev->regs->gpioctl); | |
229 | ||
230 | // FIXME this LED never seems to turn on. | |
231 | if (is_active) | |
232 | val |= GPIO2_DATA; | |
233 | else | |
234 | val &= ~GPIO2_DATA; | |
235 | writel (val, &dev->regs->gpioctl); | |
236 | } | |
237 | static inline void net2280_led_shutdown (struct net2280 *dev) | |
238 | { | |
239 | /* turn off all four GPIO*_DATA bits */ | |
240 | writel (readl (&dev->regs->gpioctl) & ~0x0f, | |
241 | &dev->regs->gpioctl); | |
242 | } | |
243 | ||
244 | #else | |
245 | ||
246 | #define net2280_led_init(dev) do { } while (0) | |
247 | #define net2280_led_speed(dev, speed) do { } while (0) | |
248 | #define net2280_led_shutdown(dev) do { } while (0) | |
249 | ||
250 | #endif | |
251 | ||
252 | /*-------------------------------------------------------------------------*/ | |
253 | ||
254 | #define xprintk(dev,level,fmt,args...) \ | |
255 | printk(level "%s %s: " fmt , driver_name , \ | |
256 | pci_name(dev->pdev) , ## args) | |
257 | ||
258 | #ifdef DEBUG | |
259 | #undef DEBUG | |
260 | #define DEBUG(dev,fmt,args...) \ | |
261 | xprintk(dev , KERN_DEBUG , fmt , ## args) | |
262 | #else | |
263 | #define DEBUG(dev,fmt,args...) \ | |
264 | do { } while (0) | |
265 | #endif /* DEBUG */ | |
266 | ||
267 | #ifdef VERBOSE | |
268 | #define VDEBUG DEBUG | |
269 | #else | |
270 | #define VDEBUG(dev,fmt,args...) \ | |
271 | do { } while (0) | |
272 | #endif /* VERBOSE */ | |
273 | ||
274 | #define ERROR(dev,fmt,args...) \ | |
275 | xprintk(dev , KERN_ERR , fmt , ## args) | |
b6c63937 | 276 | #define WARNING(dev,fmt,args...) \ |
1da177e4 LT |
277 | xprintk(dev , KERN_WARNING , fmt , ## args) |
278 | #define INFO(dev,fmt,args...) \ | |
279 | xprintk(dev , KERN_INFO , fmt , ## args) | |
280 | ||
281 | /*-------------------------------------------------------------------------*/ | |
282 | ||
283 | static inline void start_out_naking (struct net2280_ep *ep) | |
284 | { | |
285 | /* NOTE: hardware races lurk here, and PING protocol issues */ | |
286 | writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
287 | /* synch with device */ | |
288 | readl (&ep->regs->ep_rsp); | |
289 | } | |
290 | ||
291 | #ifdef DEBUG | |
292 | static inline void assert_out_naking (struct net2280_ep *ep, const char *where) | |
293 | { | |
294 | u32 tmp = readl (&ep->regs->ep_stat); | |
295 | ||
296 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { | |
297 | DEBUG (ep->dev, "%s %s %08x !NAK\n", | |
298 | ep->ep.name, where, tmp); | |
299 | writel ((1 << SET_NAK_OUT_PACKETS), | |
300 | &ep->regs->ep_rsp); | |
301 | } | |
302 | } | |
441b62c1 | 303 | #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep,__func__) |
1da177e4 LT |
304 | #else |
305 | #define ASSERT_OUT_NAKING(ep) do {} while (0) | |
306 | #endif | |
307 | ||
308 | static inline void stop_out_naking (struct net2280_ep *ep) | |
309 | { | |
310 | u32 tmp; | |
311 | ||
312 | tmp = readl (&ep->regs->ep_stat); | |
313 | if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) | |
314 | writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); | |
315 | } | |
316 | ||
317 | #endif /* __KERNEL__ */ |