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