1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * ISP1362 HCD (Host Controller Driver) for USB.
4 *
5 * COPYRIGHT (C) by L. Wassmann <LW@KARO-electronics.de>
6 */
7
8 /* ------------------------------------------------------------------------- */
9
10 #define MAX_ROOT_PORTS 2
11
12 #define USE_32BIT 0
13
14 /* These options are mutually exclusive */
15 #define USE_PLATFORM_DELAY 0
16 #define USE_NDELAY 0
17
18 #define DUMMY_DELAY_ACCESS do {} while (0)
19
20 /* ------------------------------------------------------------------------- */
21
22 #define USB_RESET_WIDTH 50
23 #define MAX_XFER_SIZE 1023
24
25 /* Buffer sizes */
26 #define ISP1362_BUF_SIZE 4096
27 #define ISP1362_ISTL_BUFSIZE 512
28 #define ISP1362_INTL_BLKSIZE 64
29 #define ISP1362_INTL_BUFFERS 16
30 #define ISP1362_ATL_BLKSIZE 64
31
32 #define ISP1362_REG_WRITE_OFFSET 0x80
33
34 #define REG_WIDTH_16 0x000
35 #define REG_WIDTH_32 0x100
36 #define REG_WIDTH_MASK 0x100
37 #define REG_NO_MASK 0x0ff
38
39 #ifdef ISP1362_DEBUG
40 typedef const unsigned int isp1362_reg_t;
41
42 #define REG_ACCESS_R 0x200
43 #define REG_ACCESS_W 0x400
44 #define REG_ACCESS_RW 0x600
45 #define REG_ACCESS_MASK 0x600
46
47 #define ISP1362_REG_NO(r) ((r) & REG_NO_MASK)
48
49 #define ISP1362_REG(name, addr, width, rw) \
50 static isp1362_reg_t ISP1362_REG_##name = ((addr) | (width) | (rw))
51
52 #define REG_ACCESS_TEST(r) BUG_ON(((r) & ISP1362_REG_WRITE_OFFSET) && !((r) & REG_ACCESS_W))
53 #define REG_WIDTH_TEST(r, w) BUG_ON(((r) & REG_WIDTH_MASK) != (w))
54 #else
55 typedef const unsigned char isp1362_reg_t;
56 #define ISP1362_REG_NO(r) (r)
57
58 #define ISP1362_REG(name, addr, width, rw) \
59 static isp1362_reg_t __maybe_unused ISP1362_REG_##name = addr
60
61 #define REG_ACCESS_TEST(r) do {} while (0)
62 #define REG_WIDTH_TEST(r, w) do {} while (0)
63 #endif
64
65 /* OHCI compatible registers */
66 /*
67 * Note: Some of the ISP1362 'OHCI' registers implement only
68 * a subset of the bits defined in the OHCI spec.
69 *
70 * Bitmasks for the individual bits of these registers are defined in "ohci.h"
71 */
72 ISP1362_REG(HCREVISION, 0x00, REG_WIDTH_32, REG_ACCESS_R);
73 ISP1362_REG(HCCONTROL, 0x01, REG_WIDTH_32, REG_ACCESS_RW);
74 ISP1362_REG(HCCMDSTAT, 0x02, REG_WIDTH_32, REG_ACCESS_RW);
75 ISP1362_REG(HCINTSTAT, 0x03, REG_WIDTH_32, REG_ACCESS_RW);
76 ISP1362_REG(HCINTENB, 0x04, REG_WIDTH_32, REG_ACCESS_RW);
77 ISP1362_REG(HCINTDIS, 0x05, REG_WIDTH_32, REG_ACCESS_RW);
78 ISP1362_REG(HCFMINTVL, 0x0d, REG_WIDTH_32, REG_ACCESS_RW);
79 ISP1362_REG(HCFMREM, 0x0e, REG_WIDTH_32, REG_ACCESS_RW);
80 ISP1362_REG(HCFMNUM, 0x0f, REG_WIDTH_32, REG_ACCESS_RW);
81 ISP1362_REG(HCLSTHRESH, 0x11, REG_WIDTH_32, REG_ACCESS_RW);
82 ISP1362_REG(HCRHDESCA, 0x12, REG_WIDTH_32, REG_ACCESS_RW);
83 ISP1362_REG(HCRHDESCB, 0x13, REG_WIDTH_32, REG_ACCESS_RW);
84 ISP1362_REG(HCRHSTATUS, 0x14, REG_WIDTH_32, REG_ACCESS_RW);
85 ISP1362_REG(HCRHPORT1, 0x15, REG_WIDTH_32, REG_ACCESS_RW);
86 ISP1362_REG(HCRHPORT2, 0x16, REG_WIDTH_32, REG_ACCESS_RW);
87
88 /* Philips ISP1362 specific registers */
89 ISP1362_REG(HCHWCFG, 0x20, REG_WIDTH_16, REG_ACCESS_RW);
90 #define HCHWCFG_DISABLE_SUSPEND (1 << 15)
91 #define HCHWCFG_GLOBAL_PWRDOWN (1 << 14)
92 #define HCHWCFG_PULLDOWN_DS2 (1 << 13)
93 #define HCHWCFG_PULLDOWN_DS1 (1 << 12)
94 #define HCHWCFG_CLKNOTSTOP (1 << 11)
95 #define HCHWCFG_ANALOG_OC (1 << 10)
96 #define HCHWCFG_ONEINT (1 << 9)
97 #define HCHWCFG_DACK_MODE (1 << 8)
98 #define HCHWCFG_ONEDMA (1 << 7)
99 #define HCHWCFG_DACK_POL (1 << 6)
100 #define HCHWCFG_DREQ_POL (1 << 5)
101 #define HCHWCFG_DBWIDTH_MASK (0x03 << 3)
102 #define HCHWCFG_DBWIDTH(n) (((n) << 3) & HCHWCFG_DBWIDTH_MASK)
103 #define HCHWCFG_INT_POL (1 << 2)
104 #define HCHWCFG_INT_TRIGGER (1 << 1)
105 #define HCHWCFG_INT_ENABLE (1 << 0)
106
107 ISP1362_REG(HCDMACFG, 0x21, REG_WIDTH_16, REG_ACCESS_RW);
108 #define HCDMACFG_CTR_ENABLE (1 << 7)
109 #define HCDMACFG_BURST_LEN_MASK (0x03 << 5)
110 #define HCDMACFG_BURST_LEN(n) (((n) << 5) & HCDMACFG_BURST_LEN_MASK)
111 #define HCDMACFG_BURST_LEN_1 HCDMACFG_BURST_LEN(0)
112 #define HCDMACFG_BURST_LEN_4 HCDMACFG_BURST_LEN(1)
113 #define HCDMACFG_BURST_LEN_8 HCDMACFG_BURST_LEN(2)
114 #define HCDMACFG_DMA_ENABLE (1 << 4)
115 #define HCDMACFG_BUF_TYPE_MASK (0x07 << 1)
116 #define HCDMACFG_BUF_TYPE(n) (((n) << 1) & HCDMACFG_BUF_TYPE_MASK)
117 #define HCDMACFG_BUF_ISTL0 HCDMACFG_BUF_TYPE(0)
118 #define HCDMACFG_BUF_ISTL1 HCDMACFG_BUF_TYPE(1)
119 #define HCDMACFG_BUF_INTL HCDMACFG_BUF_TYPE(2)
120 #define HCDMACFG_BUF_ATL HCDMACFG_BUF_TYPE(3)
121 #define HCDMACFG_BUF_DIRECT HCDMACFG_BUF_TYPE(4)
122 #define HCDMACFG_DMA_RW_SELECT (1 << 0)
123
124 ISP1362_REG(HCXFERCTR, 0x22, REG_WIDTH_16, REG_ACCESS_RW);
125
126 ISP1362_REG(HCuPINT, 0x24, REG_WIDTH_16, REG_ACCESS_RW);
127 #define HCuPINT_SOF (1 << 0)
128 #define HCuPINT_ISTL0 (1 << 1)
129 #define HCuPINT_ISTL1 (1 << 2)
130 #define HCuPINT_EOT (1 << 3)
131 #define HCuPINT_OPR (1 << 4)
132 #define HCuPINT_SUSP (1 << 5)
133 #define HCuPINT_CLKRDY (1 << 6)
134 #define HCuPINT_INTL (1 << 7)
135 #define HCuPINT_ATL (1 << 8)
136 #define HCuPINT_OTG (1 << 9)
137
138 ISP1362_REG(HCuPINTENB, 0x25, REG_WIDTH_16, REG_ACCESS_RW);
139 /* same bit definitions apply as for HCuPINT */
140
141 ISP1362_REG(HCCHIPID, 0x27, REG_WIDTH_16, REG_ACCESS_R);
142 #define HCCHIPID_MASK 0xff00
143 #define HCCHIPID_MAGIC 0x3600
144
145 ISP1362_REG(HCSCRATCH, 0x28, REG_WIDTH_16, REG_ACCESS_RW);
146
147 ISP1362_REG(HCSWRES, 0x29, REG_WIDTH_16, REG_ACCESS_W);
148 #define HCSWRES_MAGIC 0x00f6
149
150 ISP1362_REG(HCBUFSTAT, 0x2c, REG_WIDTH_16, REG_ACCESS_RW);
151 #define HCBUFSTAT_ISTL0_FULL (1 << 0)
152 #define HCBUFSTAT_ISTL1_FULL (1 << 1)
153 #define HCBUFSTAT_INTL_ACTIVE (1 << 2)
154 #define HCBUFSTAT_ATL_ACTIVE (1 << 3)
155 #define HCBUFSTAT_RESET_HWPP (1 << 4)
156 #define HCBUFSTAT_ISTL0_ACTIVE (1 << 5)
157 #define HCBUFSTAT_ISTL1_ACTIVE (1 << 6)
158 #define HCBUFSTAT_ISTL0_DONE (1 << 8)
159 #define HCBUFSTAT_ISTL1_DONE (1 << 9)
160 #define HCBUFSTAT_PAIRED_PTDPP (1 << 10)
161
162 ISP1362_REG(HCDIRADDR, 0x32, REG_WIDTH_32, REG_ACCESS_RW);
163 #define HCDIRADDR_ADDR_MASK 0x0000ffff
164 #define HCDIRADDR_ADDR(n) (((n) << 0) & HCDIRADDR_ADDR_MASK)
165 #define HCDIRADDR_COUNT_MASK 0xffff0000
166 #define HCDIRADDR_COUNT(n) (((n) << 16) & HCDIRADDR_COUNT_MASK)
167 ISP1362_REG(HCDIRDATA, 0x45, REG_WIDTH_16, REG_ACCESS_RW);
168
169 ISP1362_REG(HCISTLBUFSZ, 0x30, REG_WIDTH_16, REG_ACCESS_RW);
170 ISP1362_REG(HCISTL0PORT, 0x40, REG_WIDTH_16, REG_ACCESS_RW);
171 ISP1362_REG(HCISTL1PORT, 0x42, REG_WIDTH_16, REG_ACCESS_RW);
172 ISP1362_REG(HCISTLRATE, 0x47, REG_WIDTH_16, REG_ACCESS_RW);
173
174 ISP1362_REG(HCINTLBUFSZ, 0x33, REG_WIDTH_16, REG_ACCESS_RW);
175 ISP1362_REG(HCINTLPORT, 0x43, REG_WIDTH_16, REG_ACCESS_RW);
176 ISP1362_REG(HCINTLBLKSZ, 0x53, REG_WIDTH_16, REG_ACCESS_RW);
177 ISP1362_REG(HCINTLDONE, 0x17, REG_WIDTH_32, REG_ACCESS_R);
178 ISP1362_REG(HCINTLSKIP, 0x18, REG_WIDTH_32, REG_ACCESS_RW);
179 ISP1362_REG(HCINTLLAST, 0x19, REG_WIDTH_32, REG_ACCESS_RW);
180 ISP1362_REG(HCINTLCURR, 0x1a, REG_WIDTH_16, REG_ACCESS_R);
181
182 ISP1362_REG(HCATLBUFSZ, 0x34, REG_WIDTH_16, REG_ACCESS_RW);
183 ISP1362_REG(HCATLPORT, 0x44, REG_WIDTH_16, REG_ACCESS_RW);
184 ISP1362_REG(HCATLBLKSZ, 0x54, REG_WIDTH_16, REG_ACCESS_RW);
185 ISP1362_REG(HCATLDONE, 0x1b, REG_WIDTH_32, REG_ACCESS_R);
186 ISP1362_REG(HCATLSKIP, 0x1c, REG_WIDTH_32, REG_ACCESS_RW);
187 ISP1362_REG(HCATLLAST, 0x1d, REG_WIDTH_32, REG_ACCESS_RW);
188 ISP1362_REG(HCATLCURR, 0x1e, REG_WIDTH_16, REG_ACCESS_R);
189
190 ISP1362_REG(HCATLDTC, 0x51, REG_WIDTH_16, REG_ACCESS_RW);
191 ISP1362_REG(HCATLDTCTO, 0x52, REG_WIDTH_16, REG_ACCESS_RW);
192
193
194 ISP1362_REG(OTGCONTROL, 0x62, REG_WIDTH_16, REG_ACCESS_RW);
195 ISP1362_REG(OTGSTATUS, 0x67, REG_WIDTH_16, REG_ACCESS_R);
196 ISP1362_REG(OTGINT, 0x68, REG_WIDTH_16, REG_ACCESS_RW);
197 ISP1362_REG(OTGINTENB, 0x69, REG_WIDTH_16, REG_ACCESS_RW);
198 ISP1362_REG(OTGTIMER, 0x6A, REG_WIDTH_16, REG_ACCESS_RW);
199 ISP1362_REG(OTGALTTMR, 0x6C, REG_WIDTH_16, REG_ACCESS_RW);
200
201 /* Philips transfer descriptor, cpu-endian */
202 struct ptd {
203 u16 count;
204 #define PTD_COUNT_MSK (0x3ff << 0)
205 #define PTD_TOGGLE_MSK (1 << 10)
206 #define PTD_ACTIVE_MSK (1 << 11)
207 #define PTD_CC_MSK (0xf << 12)
208 u16 mps;
209 #define PTD_MPS_MSK (0x3ff << 0)
210 #define PTD_SPD_MSK (1 << 10)
211 #define PTD_LAST_MSK (1 << 11)
212 #define PTD_EP_MSK (0xf << 12)
213 u16 len;
214 #define PTD_LEN_MSK (0x3ff << 0)
215 #define PTD_DIR_MSK (3 << 10)
216 #define PTD_DIR_SETUP (0)
217 #define PTD_DIR_OUT (1)
218 #define PTD_DIR_IN (2)
219 u16 faddr;
220 #define PTD_FA_MSK (0x7f << 0)
221 /* PTD Byte 7: [StartingFrame (if ISO PTD) | StartingFrame[0..4], PollingRate[0..2] (if INT PTD)] */
222 #define PTD_SF_ISO_MSK (0xff << 8)
223 #define PTD_SF_INT_MSK (0x1f << 8)
224 #define PTD_PR_MSK (0x07 << 13)
225 } __attribute__ ((packed, aligned(2)));
226 #define PTD_HEADER_SIZE sizeof(struct ptd)
227
228 /* ------------------------------------------------------------------------- */
229 /* Copied from ohci.h: */
230 /*
231 * Hardware transfer status codes -- CC from PTD
232 */
233 #define PTD_CC_NOERROR 0x00
234 #define PTD_CC_CRC 0x01
235 #define PTD_CC_BITSTUFFING 0x02
236 #define PTD_CC_DATATOGGLEM 0x03
237 #define PTD_CC_STALL 0x04
238 #define PTD_DEVNOTRESP 0x05
239 #define PTD_PIDCHECKFAIL 0x06
240 #define PTD_UNEXPECTEDPID 0x07
241 #define PTD_DATAOVERRUN 0x08
242 #define PTD_DATAUNDERRUN 0x09
243 /* 0x0A, 0x0B reserved for hardware */
244 #define PTD_BUFFEROVERRUN 0x0C
245 #define PTD_BUFFERUNDERRUN 0x0D
246 /* 0x0E, 0x0F reserved for HCD */
247 #define PTD_NOTACCESSED 0x0F
248
249
250 /* map OHCI TD status codes (CC) to errno values */
251 static const int cc_to_error[16] = {
252 /* No Error */ 0,
253 /* CRC Error */ -EILSEQ,
254 /* Bit Stuff */ -EPROTO,
255 /* Data Togg */ -EILSEQ,
256 /* Stall */ -EPIPE,
257 /* DevNotResp */ -ETIMEDOUT,
258 /* PIDCheck */ -EPROTO,
259 /* UnExpPID */ -EPROTO,
260 /* DataOver */ -EOVERFLOW,
261 /* DataUnder */ -EREMOTEIO,
262 /* (for hw) */ -EIO,
263 /* (for hw) */ -EIO,
264 /* BufferOver */ -ECOMM,
265 /* BuffUnder */ -ENOSR,
266 /* (for HCD) */ -EALREADY,
267 /* (for HCD) */ -EALREADY
268 };
269
270
271 /*
272 * HcControl (control) register masks
273 */
274 #define OHCI_CTRL_HCFS (3 << 6) /* host controller functional state */
275 #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
276 #define OHCI_CTRL_RWE (1 << 10) /* remote wakeup enable */
277
278 /* pre-shifted values for HCFS */
279 # define OHCI_USB_RESET (0 << 6)
280 # define OHCI_USB_RESUME (1 << 6)
281 # define OHCI_USB_OPER (2 << 6)
282 # define OHCI_USB_SUSPEND (3 << 6)
283
284 /*
285 * HcCommandStatus (cmdstatus) register masks
286 */
287 #define OHCI_HCR (1 << 0) /* host controller reset */
288 #define OHCI_SOC (3 << 16) /* scheduling overrun count */
289
290 /*
291 * masks used with interrupt registers:
292 * HcInterruptStatus (intrstatus)
293 * HcInterruptEnable (intrenable)
294 * HcInterruptDisable (intrdisable)
295 */
296 #define OHCI_INTR_SO (1 << 0) /* scheduling overrun */
297 #define OHCI_INTR_WDH (1 << 1) /* writeback of done_head */
298 #define OHCI_INTR_SF (1 << 2) /* start frame */
299 #define OHCI_INTR_RD (1 << 3) /* resume detect */
300 #define OHCI_INTR_UE (1 << 4) /* unrecoverable error */
301 #define OHCI_INTR_FNO (1 << 5) /* frame number overflow */
302 #define OHCI_INTR_RHSC (1 << 6) /* root hub status change */
303 #define OHCI_INTR_OC (1 << 30) /* ownership change */
304 #define OHCI_INTR_MIE (1 << 31) /* master interrupt enable */
305
306 /* roothub.portstatus [i] bits */
307 #define RH_PS_CCS 0x00000001 /* current connect status */
308 #define RH_PS_PES 0x00000002 /* port enable status*/
309 #define RH_PS_PSS 0x00000004 /* port suspend status */
310 #define RH_PS_POCI 0x00000008 /* port over current indicator */
311 #define RH_PS_PRS 0x00000010 /* port reset status */
312 #define RH_PS_PPS 0x00000100 /* port power status */
313 #define RH_PS_LSDA 0x00000200 /* low speed device attached */
314 #define RH_PS_CSC 0x00010000 /* connect status change */
315 #define RH_PS_PESC 0x00020000 /* port enable status change */
316 #define RH_PS_PSSC 0x00040000 /* port suspend status change */
317 #define RH_PS_OCIC 0x00080000 /* over current indicator change */
318 #define RH_PS_PRSC 0x00100000 /* port reset status change */
319
320 /* roothub.status bits */
321 #define RH_HS_LPS 0x00000001 /* local power status */
322 #define RH_HS_OCI 0x00000002 /* over current indicator */
323 #define RH_HS_DRWE 0x00008000 /* device remote wakeup enable */
324 #define RH_HS_LPSC 0x00010000 /* local power status change */
325 #define RH_HS_OCIC 0x00020000 /* over current indicator change */
326 #define RH_HS_CRWE 0x80000000 /* clear remote wakeup enable */
327
328 /* roothub.b masks */
329 #define RH_B_DR 0x0000ffff /* device removable flags */
330 #define RH_B_PPCM 0xffff0000 /* port power control mask */
331
332 /* roothub.a masks */
333 #define RH_A_NDP (0xff << 0) /* number of downstream ports */
334 #define RH_A_PSM (1 << 8) /* power switching mode */
335 #define RH_A_NPS (1 << 9) /* no power switching */
336 #define RH_A_DT (1 << 10) /* device type (mbz) */
337 #define RH_A_OCPM (1 << 11) /* over current protection mode */
338 #define RH_A_NOCP (1 << 12) /* no over current protection */
339 #define RH_A_POTPGT (0xff << 24) /* power on to power good time */
340
341 #define FI 0x2edf /* 12000 bits per frame (-1) */
342 #define FSMP(fi) (0x7fff & ((6 * ((fi) - 210)) / 7))
343 #define LSTHRESH 0x628 /* lowspeed bit threshold */
344
345 /* ------------------------------------------------------------------------- */
346
347 /* PTD accessor macros. */
348 #define PTD_GET_COUNT(p) (((p)->count & PTD_COUNT_MSK) >> 0)
349 #define PTD_COUNT(v) (((v) << 0) & PTD_COUNT_MSK)
350 #define PTD_GET_TOGGLE(p) (((p)->count & PTD_TOGGLE_MSK) >> 10)
351 #define PTD_TOGGLE(v) (((v) << 10) & PTD_TOGGLE_MSK)
352 #define PTD_GET_ACTIVE(p) (((p)->count & PTD_ACTIVE_MSK) >> 11)
353 #define PTD_ACTIVE(v) (((v) << 11) & PTD_ACTIVE_MSK)
354 #define PTD_GET_CC(p) (((p)->count & PTD_CC_MSK) >> 12)
355 #define PTD_CC(v) (((v) << 12) & PTD_CC_MSK)
356 #define PTD_GET_MPS(p) (((p)->mps & PTD_MPS_MSK) >> 0)
357 #define PTD_MPS(v) (((v) << 0) & PTD_MPS_MSK)
358 #define PTD_GET_SPD(p) (((p)->mps & PTD_SPD_MSK) >> 10)
359 #define PTD_SPD(v) (((v) << 10) & PTD_SPD_MSK)
360 #define PTD_GET_LAST(p) (((p)->mps & PTD_LAST_MSK) >> 11)
361 #define PTD_LAST(v) (((v) << 11) & PTD_LAST_MSK)
362 #define PTD_GET_EP(p) (((p)->mps & PTD_EP_MSK) >> 12)
363 #define PTD_EP(v) (((v) << 12) & PTD_EP_MSK)
364 #define PTD_GET_LEN(p) (((p)->len & PTD_LEN_MSK) >> 0)
365 #define PTD_LEN(v) (((v) << 0) & PTD_LEN_MSK)
366 #define PTD_GET_DIR(p) (((p)->len & PTD_DIR_MSK) >> 10)
367 #define PTD_DIR(v) (((v) << 10) & PTD_DIR_MSK)
368 #define PTD_GET_FA(p) (((p)->faddr & PTD_FA_MSK) >> 0)
369 #define PTD_FA(v) (((v) << 0) & PTD_FA_MSK)
370 #define PTD_GET_SF_INT(p) (((p)->faddr & PTD_SF_INT_MSK) >> 8)
371 #define PTD_SF_INT(v) (((v) << 8) & PTD_SF_INT_MSK)
372 #define PTD_GET_SF_ISO(p) (((p)->faddr & PTD_SF_ISO_MSK) >> 8)
373 #define PTD_SF_ISO(v) (((v) << 8) & PTD_SF_ISO_MSK)
374 #define PTD_GET_PR(p) (((p)->faddr & PTD_PR_MSK) >> 13)
375 #define PTD_PR(v) (((v) << 13) & PTD_PR_MSK)
376
377 #define LOG2_PERIODIC_SIZE 5 /* arbitrary; this matches OHCI */
378 #define PERIODIC_SIZE (1 << LOG2_PERIODIC_SIZE)
379
380 struct isp1362_ep {
381 struct usb_host_endpoint *hep;
382 struct usb_device *udev;
383
384 /* philips transfer descriptor */
385 struct ptd ptd;
386
387 u8 maxpacket;
388 u8 epnum;
389 u8 nextpid;
390 u16 error_count;
391 u16 length; /* of current packet */
392 s16 ptd_offset; /* buffer offset in ISP1362 where
393 PTD has been stored
394 (for access thru HCDIRDATA) */
395 int ptd_index;
396 int num_ptds;
397 void *data; /* to databuf */
398 /* queue of active EPs (the ones transmitted to the chip) */
399 struct list_head active;
400
401 /* periodic schedule */
402 u8 branch;
403 u16 interval;
404 u16 load;
405 u16 last_iso;
406
407 /* async schedule */
408 struct list_head schedule; /* list of all EPs that need processing */
409 struct list_head remove_list;
410 int num_req;
411 };
412
413 struct isp1362_ep_queue {
414 struct list_head active; /* list of PTDs currently processed by HC */
415 atomic_t finishing;
416 unsigned long buf_map;
417 unsigned long skip_map;
418 int free_ptd;
419 u16 buf_start;
420 u16 buf_size;
421 u16 blk_size; /* PTD buffer block size for ATL and INTL */
422 u8 buf_count;
423 u8 buf_avail;
424 char name[16];
425
426 /* for statistical tracking */
427 u8 stat_maxptds; /* Max # of ptds seen simultaneously in fifo */
428 u8 ptd_count; /* number of ptds submitted to this queue */
429 };
430
431 struct isp1362_hcd {
432 spinlock_t lock;
433 void __iomem *addr_reg;
434 void __iomem *data_reg;
435
436 struct isp1362_platform_data *board;
437
438 unsigned long stat1, stat2, stat4, stat8, stat16;
439
440 /* HC registers */
441 u32 intenb; /* "OHCI" interrupts */
442 u16 irqenb; /* uP interrupts */
443
444 /* Root hub registers */
445 u32 rhdesca;
446 u32 rhdescb;
447 u32 rhstatus;
448 u32 rhport[MAX_ROOT_PORTS];
449 unsigned long next_statechange;
450
451 /* HC control reg shadow copy */
452 u32 hc_control;
453
454 /* async schedule: control, bulk */
455 struct list_head async;
456
457 /* periodic schedule: int */
458 u16 load[PERIODIC_SIZE];
459 struct list_head periodic;
460 u16 fmindex;
461
462 /* periodic schedule: isochronous */
463 struct list_head isoc;
464 unsigned int istl_flip:1;
465 unsigned int irq_active:1;
466
467 /* Schedules for the current frame */
468 struct isp1362_ep_queue atl_queue;
469 struct isp1362_ep_queue intl_queue;
470 struct isp1362_ep_queue istl_queue[2];
471
472 /* list of PTDs retrieved from HC */
473 struct list_head remove_list;
474 enum {
475 ISP1362_INT_SOF,
476 ISP1362_INT_ISTL0,
477 ISP1362_INT_ISTL1,
478 ISP1362_INT_EOT,
479 ISP1362_INT_OPR,
480 ISP1362_INT_SUSP,
481 ISP1362_INT_CLKRDY,
482 ISP1362_INT_INTL,
483 ISP1362_INT_ATL,
484 ISP1362_INT_OTG,
485 NUM_ISP1362_IRQS
486 } IRQ_NAMES;
487 unsigned int irq_stat[NUM_ISP1362_IRQS];
488 int req_serial;
489 };
490
ISP1362_INT_NAME(int n)491 static inline const char *ISP1362_INT_NAME(int n)
492 {
493 switch (n) {
494 case ISP1362_INT_SOF: return "SOF";
495 case ISP1362_INT_ISTL0: return "ISTL0";
496 case ISP1362_INT_ISTL1: return "ISTL1";
497 case ISP1362_INT_EOT: return "EOT";
498 case ISP1362_INT_OPR: return "OPR";
499 case ISP1362_INT_SUSP: return "SUSP";
500 case ISP1362_INT_CLKRDY: return "CLKRDY";
501 case ISP1362_INT_INTL: return "INTL";
502 case ISP1362_INT_ATL: return "ATL";
503 case ISP1362_INT_OTG: return "OTG";
504 default: return "unknown";
505 }
506 }
507
ALIGNSTAT(struct isp1362_hcd * isp1362_hcd,void * ptr)508 static inline void ALIGNSTAT(struct isp1362_hcd *isp1362_hcd, void *ptr)
509 {
510 unsigned long p = (unsigned long)ptr;
511 if (!(p & 0xf))
512 isp1362_hcd->stat16++;
513 else if (!(p & 0x7))
514 isp1362_hcd->stat8++;
515 else if (!(p & 0x3))
516 isp1362_hcd->stat4++;
517 else if (!(p & 0x1))
518 isp1362_hcd->stat2++;
519 else
520 isp1362_hcd->stat1++;
521 }
522
hcd_to_isp1362_hcd(struct usb_hcd * hcd)523 static inline struct isp1362_hcd *hcd_to_isp1362_hcd(struct usb_hcd *hcd)
524 {
525 return (struct isp1362_hcd *) (hcd->hcd_priv);
526 }
527
isp1362_hcd_to_hcd(struct isp1362_hcd * isp1362_hcd)528 static inline struct usb_hcd *isp1362_hcd_to_hcd(struct isp1362_hcd *isp1362_hcd)
529 {
530 return container_of((void *)isp1362_hcd, struct usb_hcd, hcd_priv);
531 }
532
533 #define frame_before(f1, f2) ((s16)((u16)f1 - (u16)f2) < 0)
534
535 /*
536 * ISP1362 HW Interface
537 */
538
539 #define DBG(level, fmt...) \
540 do { \
541 if (dbg_level > level) \
542 pr_debug(fmt); \
543 } while (0)
544
545 #ifdef VERBOSE
546 # define VDBG(fmt...) DBG(3, fmt)
547 #else
548 # define VDBG(fmt...) do {} while (0)
549 #endif
550
551 #ifdef REGISTERS
552 # define RDBG(fmt...) DBG(1, fmt)
553 #else
554 # define RDBG(fmt...) do {} while (0)
555 #endif
556
557 #ifdef URB_TRACE
558 #define URB_DBG(fmt...) DBG(0, fmt)
559 #else
560 #define URB_DBG(fmt...) do {} while (0)
561 #endif
562
563
564 #if USE_PLATFORM_DELAY
565 #if USE_NDELAY
566 #error USE_PLATFORM_DELAY and USE_NDELAY defined simultaneously.
567 #endif
568 #define isp1362_delay(h, d) (h)->board->delay(isp1362_hcd_to_hcd(h)->self.controller, d)
569 #elif USE_NDELAY
570 #define isp1362_delay(h, d) ndelay(d)
571 #else
572 #define isp1362_delay(h, d) do {} while (0)
573 #endif
574
575 #define get_urb(ep) ({ \
576 BUG_ON(list_empty(&ep->hep->urb_list)); \
577 container_of(ep->hep->urb_list.next, struct urb, urb_list); \
578 })
579
580 /* basic access functions for ISP1362 chip registers */
581 /* NOTE: The contents of the address pointer register cannot be read back! The driver must ensure,
582 * that all register accesses are performed with interrupts disabled, since the interrupt
583 * handler has no way of restoring the previous state.
584 */
isp1362_write_addr(struct isp1362_hcd * isp1362_hcd,isp1362_reg_t reg)585 static void isp1362_write_addr(struct isp1362_hcd *isp1362_hcd, isp1362_reg_t reg)
586 {
587 REG_ACCESS_TEST(reg);
588 DUMMY_DELAY_ACCESS;
589 writew(ISP1362_REG_NO(reg), isp1362_hcd->addr_reg);
590 DUMMY_DELAY_ACCESS;
591 isp1362_delay(isp1362_hcd, 1);
592 }
593
isp1362_write_data16(struct isp1362_hcd * isp1362_hcd,u16 val)594 static void isp1362_write_data16(struct isp1362_hcd *isp1362_hcd, u16 val)
595 {
596 DUMMY_DELAY_ACCESS;
597 writew(val, isp1362_hcd->data_reg);
598 }
599
isp1362_read_data16(struct isp1362_hcd * isp1362_hcd)600 static u16 isp1362_read_data16(struct isp1362_hcd *isp1362_hcd)
601 {
602 u16 val;
603
604 DUMMY_DELAY_ACCESS;
605 val = readw(isp1362_hcd->data_reg);
606
607 return val;
608 }
609
isp1362_write_data32(struct isp1362_hcd * isp1362_hcd,u32 val)610 static void isp1362_write_data32(struct isp1362_hcd *isp1362_hcd, u32 val)
611 {
612 #if USE_32BIT
613 DUMMY_DELAY_ACCESS;
614 writel(val, isp1362_hcd->data_reg);
615 #else
616 DUMMY_DELAY_ACCESS;
617 writew((u16)val, isp1362_hcd->data_reg);
618 DUMMY_DELAY_ACCESS;
619 writew(val >> 16, isp1362_hcd->data_reg);
620 #endif
621 }
622
isp1362_read_data32(struct isp1362_hcd * isp1362_hcd)623 static u32 isp1362_read_data32(struct isp1362_hcd *isp1362_hcd)
624 {
625 u32 val;
626
627 #if USE_32BIT
628 DUMMY_DELAY_ACCESS;
629 val = readl(isp1362_hcd->data_reg);
630 #else
631 DUMMY_DELAY_ACCESS;
632 val = (u32)readw(isp1362_hcd->data_reg);
633 DUMMY_DELAY_ACCESS;
634 val |= (u32)readw(isp1362_hcd->data_reg) << 16;
635 #endif
636 return val;
637 }
638
639 /* use readsw/writesw to access the fifo whenever possible */
640 /* assume HCDIRDATA or XFERCTR & addr_reg have been set up */
isp1362_read_fifo(struct isp1362_hcd * isp1362_hcd,void * buf,u16 len)641 static void isp1362_read_fifo(struct isp1362_hcd *isp1362_hcd, void *buf, u16 len)
642 {
643 u8 *dp = buf;
644 u16 data;
645
646 if (!len)
647 return;
648
649 RDBG("%s: Reading %d byte from fifo to mem @ %p\n", __func__, len, buf);
650 #if USE_32BIT
651 if (len >= 4) {
652 RDBG("%s: Using readsl for %d dwords\n", __func__, len >> 2);
653 readsl(isp1362_hcd->data_reg, dp, len >> 2);
654 dp += len & ~3;
655 len &= 3;
656 }
657 #endif
658 if (len >= 2) {
659 RDBG("%s: Using readsw for %d words\n", __func__, len >> 1);
660 insw((unsigned long)isp1362_hcd->data_reg, dp, len >> 1);
661 dp += len & ~1;
662 len &= 1;
663 }
664
665 BUG_ON(len & ~1);
666 if (len > 0) {
667 data = isp1362_read_data16(isp1362_hcd);
668 RDBG("%s: Reading trailing byte %02x to mem @ %08x\n", __func__,
669 (u8)data, (u32)dp);
670 *dp = (u8)data;
671 }
672 }
673
isp1362_write_fifo(struct isp1362_hcd * isp1362_hcd,void * buf,u16 len)674 static void isp1362_write_fifo(struct isp1362_hcd *isp1362_hcd, void *buf, u16 len)
675 {
676 u8 *dp = buf;
677 u16 data;
678
679 if (!len)
680 return;
681
682 if ((unsigned long)dp & 0x1) {
683 /* not aligned */
684 for (; len > 1; len -= 2) {
685 data = *dp++;
686 data |= *dp++ << 8;
687 isp1362_write_data16(isp1362_hcd, data);
688 }
689 if (len)
690 isp1362_write_data16(isp1362_hcd, *dp);
691 return;
692 }
693
694 RDBG("%s: Writing %d byte to fifo from memory @%p\n", __func__, len, buf);
695 #if USE_32BIT
696 if (len >= 4) {
697 RDBG("%s: Using writesl for %d dwords\n", __func__, len >> 2);
698 writesl(isp1362_hcd->data_reg, dp, len >> 2);
699 dp += len & ~3;
700 len &= 3;
701 }
702 #endif
703 if (len >= 2) {
704 RDBG("%s: Using writesw for %d words\n", __func__, len >> 1);
705 outsw((unsigned long)isp1362_hcd->data_reg, dp, len >> 1);
706 dp += len & ~1;
707 len &= 1;
708 }
709
710 BUG_ON(len & ~1);
711 if (len > 0) {
712 /* finally write any trailing byte; we don't need to care
713 * about the high byte of the last word written
714 */
715 data = (u16)*dp;
716 RDBG("%s: Sending trailing byte %02x from mem @ %08x\n", __func__,
717 data, (u32)dp);
718 isp1362_write_data16(isp1362_hcd, data);
719 }
720 }
721
722 #define isp1362_read_reg16(d, r) ({ \
723 u16 __v; \
724 REG_WIDTH_TEST(ISP1362_REG_##r, REG_WIDTH_16); \
725 isp1362_write_addr(d, ISP1362_REG_##r); \
726 __v = isp1362_read_data16(d); \
727 RDBG("%s: Read %04x from %s[%02x]\n", __func__, __v, #r, \
728 ISP1362_REG_NO(ISP1362_REG_##r)); \
729 __v; \
730 })
731
732 #define isp1362_read_reg32(d, r) ({ \
733 u32 __v; \
734 REG_WIDTH_TEST(ISP1362_REG_##r, REG_WIDTH_32); \
735 isp1362_write_addr(d, ISP1362_REG_##r); \
736 __v = isp1362_read_data32(d); \
737 RDBG("%s: Read %08x from %s[%02x]\n", __func__, __v, #r, \
738 ISP1362_REG_NO(ISP1362_REG_##r)); \
739 __v; \
740 })
741
742 #define isp1362_write_reg16(d, r, v) { \
743 REG_WIDTH_TEST(ISP1362_REG_##r, REG_WIDTH_16); \
744 isp1362_write_addr(d, (ISP1362_REG_##r) | ISP1362_REG_WRITE_OFFSET); \
745 isp1362_write_data16(d, (u16)(v)); \
746 RDBG("%s: Wrote %04x to %s[%02x]\n", __func__, (u16)(v), #r, \
747 ISP1362_REG_NO(ISP1362_REG_##r)); \
748 }
749
750 #define isp1362_write_reg32(d, r, v) { \
751 REG_WIDTH_TEST(ISP1362_REG_##r, REG_WIDTH_32); \
752 isp1362_write_addr(d, (ISP1362_REG_##r) | ISP1362_REG_WRITE_OFFSET); \
753 isp1362_write_data32(d, (u32)(v)); \
754 RDBG("%s: Wrote %08x to %s[%02x]\n", __func__, (u32)(v), #r, \
755 ISP1362_REG_NO(ISP1362_REG_##r)); \
756 }
757
758 #define isp1362_set_mask16(d, r, m) { \
759 u16 __v; \
760 __v = isp1362_read_reg16(d, r); \
761 if ((__v | m) != __v) \
762 isp1362_write_reg16(d, r, __v | m); \
763 }
764
765 #define isp1362_clr_mask16(d, r, m) { \
766 u16 __v; \
767 __v = isp1362_read_reg16(d, r); \
768 if ((__v & ~m) != __v) \
769 isp1362_write_reg16(d, r, __v & ~m); \
770 }
771
772 #define isp1362_set_mask32(d, r, m) { \
773 u32 __v; \
774 __v = isp1362_read_reg32(d, r); \
775 if ((__v | m) != __v) \
776 isp1362_write_reg32(d, r, __v | m); \
777 }
778
779 #define isp1362_clr_mask32(d, r, m) { \
780 u32 __v; \
781 __v = isp1362_read_reg32(d, r); \
782 if ((__v & ~m) != __v) \
783 isp1362_write_reg32(d, r, __v & ~m); \
784 }
785
786 #define isp1362_show_reg(d, r) { \
787 if ((ISP1362_REG_##r & REG_WIDTH_MASK) == REG_WIDTH_32) \
788 DBG(0, "%-12s[%02x]: %08x\n", #r, \
789 ISP1362_REG_NO(ISP1362_REG_##r), isp1362_read_reg32(d, r)); \
790 else \
791 DBG(0, "%-12s[%02x]: %04x\n", #r, \
792 ISP1362_REG_NO(ISP1362_REG_##r), isp1362_read_reg16(d, r)); \
793 }
794
isp1362_write_diraddr(struct isp1362_hcd * isp1362_hcd,u16 offset,u16 len)795 static void isp1362_write_diraddr(struct isp1362_hcd *isp1362_hcd, u16 offset, u16 len)
796 {
797 len = (len + 1) & ~1;
798
799 isp1362_clr_mask16(isp1362_hcd, HCDMACFG, HCDMACFG_CTR_ENABLE);
800 isp1362_write_reg32(isp1362_hcd, HCDIRADDR,
801 HCDIRADDR_ADDR(offset) | HCDIRADDR_COUNT(len));
802 }
803
isp1362_read_buffer(struct isp1362_hcd * isp1362_hcd,void * buf,u16 offset,int len)804 static void isp1362_read_buffer(struct isp1362_hcd *isp1362_hcd, void *buf, u16 offset, int len)
805 {
806 isp1362_write_diraddr(isp1362_hcd, offset, len);
807
808 DBG(3, "%s: Reading %d byte from buffer @%04x to memory @ %p\n",
809 __func__, len, offset, buf);
810
811 isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_EOT);
812
813 isp1362_write_addr(isp1362_hcd, ISP1362_REG_HCDIRDATA);
814
815 isp1362_read_fifo(isp1362_hcd, buf, len);
816 isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_EOT);
817 }
818
isp1362_write_buffer(struct isp1362_hcd * isp1362_hcd,void * buf,u16 offset,int len)819 static void isp1362_write_buffer(struct isp1362_hcd *isp1362_hcd, void *buf, u16 offset, int len)
820 {
821 isp1362_write_diraddr(isp1362_hcd, offset, len);
822
823 DBG(3, "%s: Writing %d byte to buffer @%04x from memory @ %p\n",
824 __func__, len, offset, buf);
825
826 isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_EOT);
827
828 isp1362_write_addr(isp1362_hcd, ISP1362_REG_HCDIRDATA | ISP1362_REG_WRITE_OFFSET);
829 isp1362_write_fifo(isp1362_hcd, buf, len);
830
831 isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_EOT);
832 }
833
dump_data(char * buf,int len)834 static void __attribute__((unused)) dump_data(char *buf, int len)
835 {
836 if (dbg_level > 0) {
837 int k;
838 int lf = 0;
839
840 for (k = 0; k < len; ++k) {
841 if (!lf)
842 DBG(0, "%04x:", k);
843 printk(" %02x", ((u8 *) buf)[k]);
844 lf = 1;
845 if (!k)
846 continue;
847 if (k % 16 == 15) {
848 printk("\n");
849 lf = 0;
850 continue;
851 }
852 if (k % 8 == 7)
853 printk(" ");
854 if (k % 4 == 3)
855 printk(" ");
856 }
857 if (lf)
858 printk("\n");
859 }
860 }
861
862 #if defined(PTD_TRACE)
863
dump_ptd(struct ptd * ptd)864 static void dump_ptd(struct ptd *ptd)
865 {
866 DBG(0, "EP %p: CC=%x EP=%d DIR=%x CNT=%d LEN=%d MPS=%d TGL=%x ACT=%x FA=%d SPD=%x SF=%x PR=%x LST=%x\n",
867 container_of(ptd, struct isp1362_ep, ptd),
868 PTD_GET_CC(ptd), PTD_GET_EP(ptd), PTD_GET_DIR(ptd),
869 PTD_GET_COUNT(ptd), PTD_GET_LEN(ptd), PTD_GET_MPS(ptd),
870 PTD_GET_TOGGLE(ptd), PTD_GET_ACTIVE(ptd), PTD_GET_FA(ptd),
871 PTD_GET_SPD(ptd), PTD_GET_SF_INT(ptd), PTD_GET_PR(ptd), PTD_GET_LAST(ptd));
872 DBG(0, " %04x %04x %04x %04x\n", ptd->count, ptd->mps, ptd->len, ptd->faddr);
873 }
874
dump_ptd_out_data(struct ptd * ptd,u8 * buf)875 static void dump_ptd_out_data(struct ptd *ptd, u8 *buf)
876 {
877 if (dbg_level > 0) {
878 if (PTD_GET_DIR(ptd) != PTD_DIR_IN && PTD_GET_LEN(ptd)) {
879 DBG(0, "--out->\n");
880 dump_data(buf, PTD_GET_LEN(ptd));
881 }
882 }
883 }
884
dump_ptd_in_data(struct ptd * ptd,u8 * buf)885 static void dump_ptd_in_data(struct ptd *ptd, u8 *buf)
886 {
887 if (dbg_level > 0) {
888 if (PTD_GET_DIR(ptd) == PTD_DIR_IN && PTD_GET_COUNT(ptd)) {
889 DBG(0, "<--in--\n");
890 dump_data(buf, PTD_GET_COUNT(ptd));
891 }
892 DBG(0, "-----\n");
893 }
894 }
895
dump_ptd_queue(struct isp1362_ep_queue * epq)896 static void dump_ptd_queue(struct isp1362_ep_queue *epq)
897 {
898 struct isp1362_ep *ep;
899 int dbg = dbg_level;
900
901 dbg_level = 1;
902 list_for_each_entry(ep, &epq->active, active) {
903 dump_ptd(&ep->ptd);
904 dump_data(ep->data, ep->length);
905 }
906 dbg_level = dbg;
907 }
908 #else
909 #define dump_ptd(ptd) do {} while (0)
910 #define dump_ptd_in_data(ptd, buf) do {} while (0)
911 #define dump_ptd_out_data(ptd, buf) do {} while (0)
912 #define dump_ptd_data(ptd, buf) do {} while (0)
913 #define dump_ptd_queue(epq) do {} while (0)
914 #endif
915