2 * URB OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2001 David Brownell <dbrownell@users.sourceforge.net>
10 static int cc_to_error[16] = {
12 /* mapping of the OHCI CC status to error codes */
14 /* CRC Error */ USB_ST_CRC_ERR,
15 /* Bit Stuff */ USB_ST_BIT_ERR,
16 /* Data Togg */ USB_ST_CRC_ERR,
17 /* Stall */ USB_ST_STALLED,
19 /* PIDCheck */ USB_ST_BIT_ERR,
20 /* UnExpPID */ USB_ST_BIT_ERR,
21 /* DataOver */ USB_ST_BUF_ERR,
22 /* DataUnder */ USB_ST_BUF_ERR,
25 /* BufferOver */ USB_ST_BUF_ERR,
26 /* BuffUnder */ USB_ST_BUF_ERR,
34 #define ED_UNLINK 0x01
37 #define ED_URB_DEL 0x08
54 struct ed *ed_rm_list;
56 struct usb_device *usb_dev;
58 } __attribute((aligned(16)));
59 typedef struct ed ed_t;
62 #define TD_CC 0xf0000000
63 #define TD_CC_GET(td_p) ((td_p >>28) & 0x0f)
64 #define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
65 #define TD_EC 0x0C000000
66 #define TD_T 0x03000000
67 #define TD_T_DATA0 0x02000000
68 #define TD_T_DATA1 0x03000000
69 #define TD_T_TOGGLE 0x00000000
70 #define TD_R 0x00040000
71 #define TD_DI 0x00E00000
72 #define TD_DI_SET(X) (((X) & 0x07)<< 21)
73 #define TD_DP 0x00180000
74 #define TD_DP_SETUP 0x00000000
75 #define TD_DP_IN 0x00100000
76 #define TD_DP_OUT 0x00080000
78 #define TD_ISO 0x00010000
79 #define TD_DEL 0x00020000
82 #define TD_CC_NOERROR 0x00
83 #define TD_CC_CRC 0x01
84 #define TD_CC_BITSTUFFING 0x02
85 #define TD_CC_DATATOGGLEM 0x03
86 #define TD_CC_STALL 0x04
87 #define TD_DEVNOTRESP 0x05
88 #define TD_PIDCHECKFAIL 0x06
89 #define TD_UNEXPECTEDPID 0x07
90 #define TD_DATAOVERRUN 0x08
91 #define TD_DATAUNDERRUN 0x09
92 #define TD_BUFFEROVERRUN 0x0C
93 #define TD_BUFFERUNDERRUN 0x0D
94 #define TD_NOTACCESSED 0x0F
100 __u32 hwCBP; /* Current Buffer Pointer */
101 __u32 hwNextTD; /* Next TD Pointer */
102 __u32 hwBE; /* Memory Buffer End Pointer */
108 struct td *next_dl_td;
109 struct usb_device *usb_dev;
114 } __attribute((aligned(32)));
115 typedef struct td td_t;
117 #define OHCI_ED_SKIP (1 << 14)
120 * The HCCA (Host Controller Communications Area) is a 256 byte
121 * structure defined in the OHCI spec. that the host controller is
122 * told the base address of. It must be 256-byte aligned.
125 #define NUM_INTS 32 /* part of the OHCI standard */
127 __u32 int_table[NUM_INTS]; /* Interrupt ED table */
128 #if defined(CONFIG_MPC5200)
129 __u16 pad1; /* set to 0 on each frame_no change */
130 __u16 frame_no; /* current frame number */
132 __u16 frame_no; /* current frame number */
133 __u16 pad1; /* set to 0 on each frame_no change */
135 __u32 done_head; /* info returned for an interrupt */
136 u8 reserved_for_hc[116];
137 } __attribute((aligned(256)));
140 * Maximum number of root hub ports.
142 #define MAX_ROOT_PORTS 15 /* maximum OHCI root hub ports */
145 * This is the structure of the OHCI controller's memory mapped I/O
146 * region. This is Memory Mapped I/O. You must use the readl() and
147 * writel() macros defined in asm/io.h to access these!!
150 /* control and status registers */
157 /* memory pointers */
159 __u32 ed_periodcurrent;
160 __u32 ed_controlhead;
161 __u32 ed_controlcurrent;
163 __u32 ed_bulkcurrent;
172 struct ohci_roothub_regs {
176 __u32 portstatus[MAX_ROOT_PORTS];
178 } __attribute((aligned(32)));
180 /* OHCI CONTROL AND STATUS REGISTER MASKS */
183 * HcControl (control) register masks
185 #define OHCI_CTRL_CBSR (3 << 0) /* control/bulk service ratio */
186 #define OHCI_CTRL_PLE (1 << 2) /* periodic list enable */
187 #define OHCI_CTRL_IE (1 << 3) /* isochronous enable */
188 #define OHCI_CTRL_CLE (1 << 4) /* control list enable */
189 #define OHCI_CTRL_BLE (1 << 5) /* bulk list enable */
190 #define OHCI_CTRL_HCFS (3 << 6) /* host controller functional state */
191 #define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
192 #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
193 #define OHCI_CTRL_RWE (1 << 10) /* remote wakeup enable */
195 /* pre-shifted values for HCFS */
196 # define OHCI_USB_RESET (0 << 6)
197 # define OHCI_USB_RESUME (1 << 6)
198 # define OHCI_USB_OPER (2 << 6)
199 # define OHCI_USB_SUSPEND (3 << 6)
202 * HcCommandStatus (cmdstatus) register masks
204 #define OHCI_HCR (1 << 0) /* host controller reset */
205 #define OHCI_CLF (1 << 1) /* control list filled */
206 #define OHCI_BLF (1 << 2) /* bulk list filled */
207 #define OHCI_OCR (1 << 3) /* ownership change request */
208 #define OHCI_SOC (3 << 16) /* scheduling overrun count */
211 * masks used with interrupt registers:
212 * HcInterruptStatus (intrstatus)
213 * HcInterruptEnable (intrenable)
214 * HcInterruptDisable (intrdisable)
216 #define OHCI_INTR_SO (1 << 0) /* scheduling overrun */
217 #define OHCI_INTR_WDH (1 << 1) /* writeback of done_head */
218 #define OHCI_INTR_SF (1 << 2) /* start frame */
219 #define OHCI_INTR_RD (1 << 3) /* resume detect */
220 #define OHCI_INTR_UE (1 << 4) /* unrecoverable error */
221 #define OHCI_INTR_FNO (1 << 5) /* frame number overflow */
222 #define OHCI_INTR_RHSC (1 << 6) /* root hub status change */
223 #define OHCI_INTR_OC (1 << 30) /* ownership change */
224 #define OHCI_INTR_MIE (1 << 31) /* master interrupt enable */
226 /* Virtual Root HUB */
227 struct virt_root_hub {
228 int devnum; /* Address of Root Hub endpoint */
229 void *dev; /* was urb */
235 /* USB HUB CONSTANTS (not OHCI-specific; see hub.h) */
237 /* destination of request */
238 #define RH_INTERFACE 0x01
239 #define RH_ENDPOINT 0x02
240 #define RH_OTHER 0x03
242 #define RH_CLASS 0x20
243 #define RH_VENDOR 0x40
245 /* Requests: bRequest << 8 | bmRequestType */
246 #define RH_GET_STATUS 0x0080
247 #define RH_CLEAR_FEATURE 0x0100
248 #define RH_SET_FEATURE 0x0300
249 #define RH_SET_ADDRESS 0x0500
250 #define RH_GET_DESCRIPTOR 0x0680
251 #define RH_SET_DESCRIPTOR 0x0700
252 #define RH_GET_CONFIGURATION 0x0880
253 #define RH_SET_CONFIGURATION 0x0900
254 #define RH_GET_STATE 0x0280
255 #define RH_GET_INTERFACE 0x0A80
256 #define RH_SET_INTERFACE 0x0B00
257 #define RH_SYNC_FRAME 0x0C80
258 /* Our Vendor Specific Request */
259 #define RH_SET_EP 0x2000
261 /* Hub port features */
262 #define RH_PORT_CONNECTION 0x00
263 #define RH_PORT_ENABLE 0x01
264 #define RH_PORT_SUSPEND 0x02
265 #define RH_PORT_OVER_CURRENT 0x03
266 #define RH_PORT_RESET 0x04
267 #define RH_PORT_POWER 0x08
268 #define RH_PORT_LOW_SPEED 0x09
270 #define RH_C_PORT_CONNECTION 0x10
271 #define RH_C_PORT_ENABLE 0x11
272 #define RH_C_PORT_SUSPEND 0x12
273 #define RH_C_PORT_OVER_CURRENT 0x13
274 #define RH_C_PORT_RESET 0x14
277 #define RH_C_HUB_LOCAL_POWER 0x00
278 #define RH_C_HUB_OVER_CURRENT 0x01
280 #define RH_DEVICE_REMOTE_WAKEUP 0x00
281 #define RH_ENDPOINT_STALL 0x01
284 #define RH_REQ_ERR -1
287 /* OHCI ROOT HUB REGISTER MASKS */
289 /* roothub.portstatus [i] bits */
290 #define RH_PS_CCS 0x00000001 /* current connect status */
291 #define RH_PS_PES 0x00000002 /* port enable status */
292 #define RH_PS_PSS 0x00000004 /* port suspend status */
293 #define RH_PS_POCI 0x00000008 /* port over current indicator */
294 #define RH_PS_PRS 0x00000010 /* port reset status */
295 #define RH_PS_PPS 0x00000100 /* port power status */
296 #define RH_PS_LSDA 0x00000200 /* low speed device attached */
297 #define RH_PS_CSC 0x00010000 /* connect status change */
298 #define RH_PS_PESC 0x00020000 /* port enable status change */
299 #define RH_PS_PSSC 0x00040000 /* port suspend status change */
300 #define RH_PS_OCIC 0x00080000 /* over current indicator change */
301 #define RH_PS_PRSC 0x00100000 /* port reset status change */
303 /* roothub.status bits */
304 #define RH_HS_LPS 0x00000001 /* local power status */
305 #define RH_HS_OCI 0x00000002 /* over current indicator */
306 #define RH_HS_DRWE 0x00008000 /* device remote wakeup enable */
307 #define RH_HS_LPSC 0x00010000 /* local power status change */
308 #define RH_HS_OCIC 0x00020000 /* over current indicator change */
309 #define RH_HS_CRWE 0x80000000 /* clear remote wakeup enable */
311 /* roothub.b masks */
312 #define RH_B_DR 0x0000ffff /* device removable flags */
313 #define RH_B_PPCM 0xffff0000 /* port power control mask */
315 /* roothub.a masks */
316 #define RH_A_NDP (0xff << 0) /* number of downstream ports */
317 #define RH_A_PSM (1 << 8) /* power switching mode */
318 #define RH_A_NPS (1 << 9) /* no power switching */
319 #define RH_A_DT (1 << 10) /* device type (mbz) */
320 #define RH_A_OCPM (1 << 11) /* over current protection mode */
321 #define RH_A_NOCP (1 << 12) /* no over current protection */
322 #define RH_A_POTPGT (0xff << 24) /* power on to power good time */
328 __u16 length; /* number of tds associated with this request */
329 __u16 td_cnt; /* number of tds already serviced */
333 td_t *td[N_URB_TD]; /* list pointer to all corresponding TDs associated with this request */
338 * This is the full ohci controller description
340 * Note how the "proper" USB information is just
341 * a subset of what the full implementation needs. (Linus)
344 typedef struct ohci {
345 struct ohci_hcca *hcca; /* hcca */
346 /*dma_addr_t hcca_dma; */
349 int disabled; /* e.g. got a UE, we're hung */
351 unsigned long flags; /* for HC bugs */
353 struct ohci_regs *regs; /* OHCI controller's memory */
355 ed_t *ed_rm_list[2]; /* lists of all endpoints to be removed */
356 ed_t *ed_bulktail; /* last endpoint of bulk list */
357 ed_t *ed_controltail; /* last endpoint of control list */
359 __u32 hc_control; /* copy of the hc control reg */
360 struct usb_device *dev[32];
361 struct virt_root_hub rh;
363 const char *slot_name;
366 #define NUM_EDS 8 /* num of preallocated endpoint descriptors */
375 static int ep_link(ohci_t * ohci, ed_t * ed);
376 static int ep_unlink(ohci_t * ohci, ed_t * ed);
377 static ed_t *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe);
379 /*-------------------------------------------------------------------------*/
381 /* we need more TDs than EDs */
384 /* +1 so we can align the storage */
385 td_t gtd[NUM_TD + 1];
386 /* pointers to aligned storage */
390 static inline struct td *td_alloc(struct usb_device *usb_dev)
396 for (i = 0; i < NUM_TD; i++) {
397 if (ptd[i].usb_dev == NULL) {
399 td->usb_dev = usb_dev;
407 static inline void ed_free(struct ed *ed)