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e554840c MK |
1 | /* |
2 | * plx9080.h | |
3d9f0739 DC |
3 | * |
4 | * Copyright (C) 2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net> | |
5 | * | |
6 | * I modified this file from the plx9060.h header for the | |
7 | * wanXL device driver in the linux kernel, | |
8 | * for the register offsets and bit definitions. Made minor modifications, | |
9 | * added plx9080 registers and | |
10 | * stripped out stuff that was specifically for the wanXL driver. | |
11 | * Note: I've only made sure the definitions are correct as far | |
12 | * as I make use of them. There are still various plx9060-isms | |
13 | * left in this header file. | |
14 | * | |
15 | ******************************************************************** | |
16 | * | |
631dd1a8 | 17 | * Copyright (C) 1999 RG Studio s.c. |
3d9f0739 DC |
18 | * Written by Krzysztof Halasa <khc@rgstudio.com.pl> |
19 | * | |
20 | * Portions (C) SBE Inc., used by permission. | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or | |
23 | * modify it under the terms of the GNU General Public License | |
24 | * as published by the Free Software Foundation; either version | |
25 | * 2 of the License, or (at your option) any later version. | |
26 | */ | |
27 | ||
28 | #ifndef __COMEDI_PLX9080_H | |
29 | #define __COMEDI_PLX9080_H | |
30 | ||
b6c77757 | 31 | /* descriptor block used for chained dma transfers */ |
3d9f0739 | 32 | struct plx_dma_desc { |
5c7895c0 HS |
33 | __le32 pci_start_addr; |
34 | __le32 local_start_addr; | |
3d9f0739 | 35 | /* transfer_size is in bytes, only first 23 bits of register are used */ |
5c7895c0 | 36 | __le32 transfer_size; |
e554840c MK |
37 | /* |
38 | * address of next descriptor (quad word aligned), plus some | |
c644a11a | 39 | * additional bits (see PLX_REG_DMADPR) |
e554840c | 40 | */ |
5c7895c0 | 41 | __le32 next; |
3d9f0739 DC |
42 | }; |
43 | ||
44 | /********************************************************************** | |
45 | ** Register Offsets and Bit Definitions | |
46 | ** | |
47 | ** Note: All offsets zero relative. IE. Some standard base address | |
48 | ** must be added to the Register Number to properly access the register. | |
49 | ** | |
50 | **********************************************************************/ | |
51 | ||
c644a11a IA |
52 | /* Local Address Space 0 Range Register */ |
53 | #define PLX_REG_LAS0RR 0x0000 | |
54 | /* Local Address Space 1 Range Register */ | |
55 | #define PLX_REG_LAS1RR 0x00f0 | |
56 | ||
be13e14e IA |
57 | #define PLX_LASRR_IO BIT(0) /* Map to: 1=I/O, 0=Mem */ |
58 | #define PLX_LASRR_ANY32 (BIT(1) * 0) /* Locate anywhere in 32 bit */ | |
59 | #define PLX_LASRR_LT1MB (BIT(1) * 1) /* Locate in 1st meg */ | |
60 | #define PLX_LASRR_ANY64 (BIT(1) * 2) /* Locate anywhere in 64 bit */ | |
61 | #define PLX_LASRR_MLOC_MASK GENMASK(2, 1) /* Memory location bits */ | |
62 | #define PLX_LASRR_PREFETCH BIT(3) /* Memory is prefetchable */ | |
63 | /* bits that specify range for memory space decode bits */ | |
64 | #define PLX_LASRR_MEM_MASK GENMASK(31, 4) | |
65 | /* bits that specify range for i/o space decode bits */ | |
66 | #define PLX_LASRR_IO_MASK GENMASK(31, 2) | |
c644a11a IA |
67 | |
68 | /* Local Address Space 0 Local Base Address (Remap) Register */ | |
69 | #define PLX_REG_LAS0BA 0x0004 | |
70 | /* Local Address Space 1 Local Base Address (Remap) Register */ | |
71 | #define PLX_REG_LAS1BA 0x00f4 | |
72 | ||
5eaa593d IA |
73 | #define PLX_LASBA_EN BIT(0) /* Enable slave decode */ |
74 | /* bits that specify local base address for memory space */ | |
75 | #define PLX_LASBA_MEM_MASK GENMASK(31, 4) | |
76 | /* bits that specify local base address for i/o space */ | |
77 | #define PLX_LASBA_IO_MASK GENMASK(31, 2) | |
3d9f0739 | 78 | |
c644a11a IA |
79 | /* Mode/Arbitration Register */ |
80 | #define PLX_REG_MARBR 0x0008 | |
81 | /* DMA Arbitration Register (alias of MARBR). */ | |
82 | #define PLX_REG_DMAARB 0x00ac | |
83 | ||
3d9f0739 DC |
84 | enum marb_bits { |
85 | MARB_LLT_MASK = 0x000000ff, /* Local Bus Latency Timer */ | |
86 | MARB_LPT_MASK = 0x0000ff00, /* Local Bus Pause Timer */ | |
87 | MARB_LTEN = 0x00010000, /* Latency Timer Enable */ | |
88 | MARB_LPEN = 0x00020000, /* Pause Timer Enable */ | |
89 | MARB_BREQ = 0x00040000, /* Local Bus BREQ Enable */ | |
90 | MARB_DMA_PRIORITY_MASK = 0x00180000, | |
e554840c MK |
91 | /* local bus direct slave give up bus mode */ |
92 | MARB_LBDS_GIVE_UP_BUS_MODE = 0x00200000, | |
93 | /* direct slave LLOCKo# enable */ | |
94 | MARB_DS_LLOCK_ENABLE = 0x00400000, | |
3d9f0739 | 95 | MARB_PCI_REQUEST_MODE = 0x00800000, |
a512f530 | 96 | MARB_PCIV21_MODE = 0x01000000, /* pci specification v2.1 mode */ |
3d9f0739 DC |
97 | MARB_PCI_READ_NO_WRITE_MODE = 0x02000000, |
98 | MARB_PCI_READ_WITH_WRITE_FLUSH_MODE = 0x04000000, | |
e554840c MK |
99 | /* gate local bus latency timer with BREQ */ |
100 | MARB_GATE_TIMER_WITH_BREQ = 0x08000000, | |
3d9f0739 DC |
101 | MARB_PCI_READ_NO_FLUSH_MODE = 0x10000000, |
102 | MARB_USE_SUBSYSTEM_IDS = 0x20000000, | |
103 | }; | |
104 | ||
c644a11a IA |
105 | /* Big/Little Endian Descriptor Register */ |
106 | #define PLX_REG_BIGEND 0x000c | |
107 | ||
3d9f0739 | 108 | enum bigend_bits { |
e554840c MK |
109 | /* use big endian ordering for configuration register accesses */ |
110 | BIGEND_CONFIG = 0x1, | |
3d9f0739 DC |
111 | BIGEND_DIRECT_MASTER = 0x2, |
112 | BIGEND_DIRECT_SLAVE_LOCAL0 = 0x4, | |
113 | BIGEND_ROM = 0x8, | |
e554840c MK |
114 | /* |
115 | * use byte lane consisting of most significant bits instead of | |
116 | * least significant | |
117 | */ | |
118 | BIGEND_BYTE_LANE = 0x10, | |
3d9f0739 DC |
119 | BIGEND_DIRECT_SLAVE_LOCAL1 = 0x20, |
120 | BIGEND_DMA1 = 0x40, | |
121 | BIGEND_DMA0 = 0x80, | |
122 | }; | |
123 | ||
e554840c MK |
124 | /* |
125 | ** Note: The Expansion ROM stuff is only relevant to the PC environment. | |
3d9f0739 DC |
126 | ** This expansion ROM code is executed by the host CPU at boot time. |
127 | ** For this reason no bit definitions are provided here. | |
e554840c | 128 | */ |
c644a11a IA |
129 | /* Expansion ROM Range Register */ |
130 | #define PLX_REG_EROMRR 0x0010 | |
131 | /* Expansion ROM Local Base Address (Remap) Register */ | |
132 | #define PLX_REG_EROMBA 0x0014 | |
133 | ||
134 | /* Local Address Space 0/Expansion ROM Bus Region Descriptor Register */ | |
135 | #define PLX_REG_LBRD0 0x0018 | |
136 | /* Local Address Space 1 Bus Region Descriptor Register */ | |
137 | #define PLX_REG_LBRD1 0x00f8 | |
3d9f0739 | 138 | |
3d9f0739 DC |
139 | #define RGN_WIDTH 0x00000002 /* Local bus width bits */ |
140 | #define RGN_8BITS 0x00000000 /* 08 bit Local Bus */ | |
141 | #define RGN_16BITS 0x00000001 /* 16 bit Local Bus */ | |
142 | #define RGN_32BITS 0x00000002 /* 32 bit Local Bus */ | |
143 | #define RGN_MWS 0x0000003C /* Memory Access Wait States */ | |
144 | #define RGN_0MWS 0x00000000 | |
145 | #define RGN_1MWS 0x00000004 | |
146 | #define RGN_2MWS 0x00000008 | |
147 | #define RGN_3MWS 0x0000000C | |
148 | #define RGN_4MWS 0x00000010 | |
149 | #define RGN_6MWS 0x00000018 | |
150 | #define RGN_8MWS 0x00000020 | |
151 | #define RGN_MRE 0x00000040 /* Memory Space Ready Input Enable */ | |
152 | #define RGN_MBE 0x00000080 /* Memory Space Bterm Input Enable */ | |
153 | #define RGN_READ_PREFETCH_DISABLE 0x00000100 | |
154 | #define RGN_ROM_PREFETCH_DISABLE 0x00000200 | |
155 | #define RGN_READ_PREFETCH_COUNT_ENABLE 0x00000400 | |
156 | #define RGN_RWS 0x003C0000 /* Expn ROM Wait States */ | |
157 | #define RGN_RRE 0x00400000 /* ROM Space Ready Input Enable */ | |
158 | #define RGN_RBE 0x00800000 /* ROM Space Bterm Input Enable */ | |
159 | #define RGN_MBEN 0x01000000 /* Memory Space Burst Enable */ | |
160 | #define RGN_RBEN 0x04000000 /* ROM Space Burst Enable */ | |
161 | #define RGN_THROT 0x08000000 /* De-assert TRDY when FIFO full */ | |
162 | #define RGN_TRD 0xF0000000 /* Target Ready Delay /8 */ | |
163 | ||
c644a11a IA |
164 | /* Local Range Register for Direct Master to PCI */ |
165 | #define PLX_REG_DMRR 0x001c | |
3d9f0739 | 166 | |
c644a11a IA |
167 | /* Local Bus Base Address Register for Direct Master to PCI Memory */ |
168 | #define PLX_REG_DMLBAM 0x0020 | |
3d9f0739 | 169 | |
c644a11a IA |
170 | /* Local Base Address Register for Direct Master to PCI IO/CFG */ |
171 | #define PLX_REG_DMLBAI 0x0024 | |
3d9f0739 | 172 | |
c644a11a IA |
173 | /* PCI Base Address (Remap) Register for Direct Master to PCI Memory */ |
174 | #define PLX_REG_DMPBAM 0x0028 | |
3d9f0739 | 175 | |
3d9f0739 DC |
176 | #define DMM_MAE 0x00000001 /* Direct Mstr Memory Acc Enable */ |
177 | #define DMM_IAE 0x00000002 /* Direct Mstr I/O Acc Enable */ | |
178 | #define DMM_LCK 0x00000004 /* LOCK Input Enable */ | |
179 | #define DMM_PF4 0x00000008 /* Prefetch 4 Mode Enable */ | |
180 | #define DMM_THROT 0x00000010 /* Assert IRDY when read FIFO full */ | |
181 | #define DMM_PAF0 0x00000000 /* Programmable Almost fill level */ | |
182 | #define DMM_PAF1 0x00000020 /* Programmable Almost fill level */ | |
183 | #define DMM_PAF2 0x00000040 /* Programmable Almost fill level */ | |
184 | #define DMM_PAF3 0x00000060 /* Programmable Almost fill level */ | |
185 | #define DMM_PAF4 0x00000080 /* Programmable Almost fill level */ | |
186 | #define DMM_PAF5 0x000000A0 /* Programmable Almost fill level */ | |
187 | #define DMM_PAF6 0x000000C0 /* Programmable Almost fill level */ | |
188 | #define DMM_PAF7 0x000000D0 /* Programmable Almost fill level */ | |
189 | #define DMM_MAP 0xFFFF0000 /* Remap Address Bits */ | |
190 | ||
c644a11a IA |
191 | /* PCI Configuration Address Register for Direct Master to PCI IO/CFG */ |
192 | #define PLX_REG_DMCFGA 0x002c | |
193 | ||
3d9f0739 DC |
194 | #define CAR_CT0 0x00000000 /* Config Type 0 */ |
195 | #define CAR_CT1 0x00000001 /* Config Type 1 */ | |
196 | #define CAR_REG 0x000000FC /* Register Number Bits */ | |
197 | #define CAR_FUN 0x00000700 /* Function Number Bits */ | |
198 | #define CAR_DEV 0x0000F800 /* Device Number Bits */ | |
199 | #define CAR_BUS 0x00FF0000 /* Bus Number Bits */ | |
200 | #define CAR_CFG 0x80000000 /* Config Spc Access Enable */ | |
201 | ||
c644a11a IA |
202 | /* |
203 | * Mailbox Register N (N <= 7) | |
204 | * | |
205 | * Note that if the I2O feature is enabled (QSR[0] is set), Mailbox Register 0 | |
206 | * is replaced by the Inbound Queue Port, and Mailbox Register 1 is replaced | |
207 | * by the Outbound Queue Port. However, Mailbox Register 0 and 1 are always | |
208 | * accessible at alternative offsets if the I2O feature is enabled. | |
209 | */ | |
210 | #define PLX_REG_MBOX(n) (0x0040 + (n) * 4) | |
211 | #define PLX_REG_MBOX0 PLX_REG_MBOX(0) | |
212 | #define PLX_REG_MBOX1 PLX_REG_MBOX(1) | |
213 | #define PLX_REG_MBOX2 PLX_REG_MBOX(2) | |
214 | #define PLX_REG_MBOX3 PLX_REG_MBOX(3) | |
215 | #define PLX_REG_MBOX4 PLX_REG_MBOX(4) | |
216 | #define PLX_REG_MBOX5 PLX_REG_MBOX(5) | |
217 | #define PLX_REG_MBOX6 PLX_REG_MBOX(6) | |
218 | #define PLX_REG_MBOX7 PLX_REG_MBOX(7) | |
219 | ||
220 | /* Alternative offsets for Mailbox Registers 0 and 1 (in case I2O is enabled) */ | |
221 | #define PLX_REG_ALT_MBOX(n) ((n) < 2 ? 0x0078 + (n) * 4 : PLX_REG_MBOX(n)) | |
222 | #define PLX_REG_ALT_MBOX0 PLX_REG_ALT_MBOX(0) | |
223 | #define PLX_REG_ALT_MBOX1 PLX_REG_ALT_MBOX(1) | |
224 | ||
225 | /* PCI-to-Local Doorbell Register */ | |
226 | #define PLX_REG_P2LDBELL 0x0060 | |
227 | ||
228 | /* Local-to-PCI Doorbell Register */ | |
229 | #define PLX_REG_L2PDBELL 0x0064 | |
230 | ||
231 | /* Interrupt Control/Status Register */ | |
232 | #define PLX_REG_INTCSR 0x0068 | |
3d9f0739 | 233 | |
3d9f0739 DC |
234 | #define ICS_AERR 0x00000001 /* Assert LSERR on ABORT */ |
235 | #define ICS_PERR 0x00000002 /* Assert LSERR on Parity Error */ | |
236 | #define ICS_SERR 0x00000004 /* Generate PCI SERR# */ | |
b6c77757 | 237 | #define ICS_MBIE 0x00000008 /* mailbox interrupt enable */ |
3d9f0739 DC |
238 | #define ICS_PIE 0x00000100 /* PCI Interrupt Enable */ |
239 | #define ICS_PDIE 0x00000200 /* PCI Doorbell Interrupt Enable */ | |
240 | #define ICS_PAIE 0x00000400 /* PCI Abort Interrupt Enable */ | |
241 | #define ICS_PLIE 0x00000800 /* PCI Local Int Enable */ | |
242 | #define ICS_RAE 0x00001000 /* Retry Abort Enable */ | |
243 | #define ICS_PDIA 0x00002000 /* PCI Doorbell Interrupt Active */ | |
244 | #define ICS_PAIA 0x00004000 /* PCI Abort Interrupt Active */ | |
245 | #define ICS_LIA 0x00008000 /* Local Interrupt Active */ | |
246 | #define ICS_LIE 0x00010000 /* Local Interrupt Enable */ | |
247 | #define ICS_LDIE 0x00020000 /* Local Doorbell Int Enable */ | |
248 | #define ICS_DMA0_E 0x00040000 /* DMA #0 Interrupt Enable */ | |
249 | #define ICS_DMA1_E 0x00080000 /* DMA #1 Interrupt Enable */ | |
250 | #define ICS_LDIA 0x00100000 /* Local Doorbell Int Active */ | |
251 | #define ICS_DMA0_A 0x00200000 /* DMA #0 Interrupt Active */ | |
252 | #define ICS_DMA1_A 0x00400000 /* DMA #1 Interrupt Active */ | |
253 | #define ICS_BIA 0x00800000 /* BIST Interrupt Active */ | |
254 | #define ICS_TA_DM 0x01000000 /* Target Abort - Direct Master */ | |
255 | #define ICS_TA_DMA0 0x02000000 /* Target Abort - DMA #0 */ | |
256 | #define ICS_TA_DMA1 0x04000000 /* Target Abort - DMA #1 */ | |
257 | #define ICS_TA_RA 0x08000000 /* Target Abort - Retry Timeout */ | |
e554840c MK |
258 | /* mailbox x is active */ |
259 | #define ICS_MBIA(x) (0x10000000 << ((x) & 0x3)) | |
3d9f0739 | 260 | |
c644a11a IA |
261 | /* |
262 | * Serial EEPROM Control, PCI Command Codes, User I/O Control, | |
263 | * Init Control Register | |
264 | */ | |
265 | #define PLX_REG_CNTRL 0x006c | |
266 | ||
3d9f0739 DC |
267 | #define CTL_RDMA 0x0000000E /* DMA Read Command */ |
268 | #define CTL_WDMA 0x00000070 /* DMA Write Command */ | |
269 | #define CTL_RMEM 0x00000600 /* Memory Read Command */ | |
270 | #define CTL_WMEM 0x00007000 /* Memory Write Command */ | |
271 | #define CTL_USERO 0x00010000 /* USERO output pin control bit */ | |
272 | #define CTL_USERI 0x00020000 /* USERI input pin bit */ | |
273 | #define CTL_EE_CLK 0x01000000 /* EEPROM Clock line */ | |
274 | #define CTL_EE_CS 0x02000000 /* EEPROM Chip Select */ | |
275 | #define CTL_EE_W 0x04000000 /* EEPROM Write bit */ | |
276 | #define CTL_EE_R 0x08000000 /* EEPROM Read bit */ | |
277 | #define CTL_EECHK 0x10000000 /* EEPROM Present bit */ | |
278 | #define CTL_EERLD 0x20000000 /* EEPROM Reload Register */ | |
279 | #define CTL_RESET 0x40000000 /* !! Adapter Reset !! */ | |
280 | #define CTL_READY 0x80000000 /* Local Init Done */ | |
281 | ||
c644a11a IA |
282 | /* PCI Permanent Configuration ID Register (hard-coded PLX vendor and device) */ |
283 | #define PLX_REG_PCIHIDR 0x0070 | |
284 | ||
285 | /* PCI Permanent Revision ID Register (hard-coded silicon revision) (8-bit). */ | |
286 | #define PLX_REG_PCIHREV 0x0074 | |
3d9f0739 | 287 | |
c644a11a IA |
288 | /* DMA Channel N Mode Register (N <= 1) */ |
289 | #define PLX_REG_DMAMODE(n) ((n) ? PLX_REG_DMAMODE1 : PLX_REG_DMAMODE0) | |
290 | #define PLX_REG_DMAMODE0 0x0080 | |
291 | #define PLX_REG_DMAMODE1 0x0094 | |
3d9f0739 | 292 | |
3d9f0739 DC |
293 | #define PLX_LOCAL_BUS_16_WIDE_BITS 0x1 |
294 | #define PLX_LOCAL_BUS_32_WIDE_BITS 0x3 | |
295 | #define PLX_LOCAL_BUS_WIDTH_MASK 0x3 | |
b6c77757 BP |
296 | #define PLX_DMA_EN_READYIN_BIT 0x40 /* enable ready in input */ |
297 | #define PLX_EN_BTERM_BIT 0x80 /* enable BTERM# input */ | |
298 | #define PLX_DMA_LOCAL_BURST_EN_BIT 0x100 /* enable local burst mode */ | |
299 | #define PLX_EN_CHAIN_BIT 0x200 /* enables chaining */ | |
e554840c MK |
300 | /* enables interrupt on dma done */ |
301 | #define PLX_EN_DMA_DONE_INTR_BIT 0x400 | |
302 | /* hold local address constant (don't increment) */ | |
303 | #define PLX_LOCAL_ADDR_CONST_BIT 0x800 | |
304 | /* enables demand-mode for dma transfer */ | |
305 | #define PLX_DEMAND_MODE_BIT 0x1000 | |
3d9f0739 DC |
306 | #define PLX_EOT_ENABLE_BIT 0x4000 |
307 | #define PLX_STOP_MODE_BIT 0x8000 | |
e554840c MK |
308 | /* routes dma interrupt to pci bus (instead of local bus) */ |
309 | #define PLX_DMA_INTR_PCI_BIT 0x20000 | |
3d9f0739 | 310 | |
c644a11a IA |
311 | /* DMA Channel N PCI Address Register (N <= 1) */ |
312 | #define PLX_REG_DMAPADR(n) ((n) ? PLX_REG_DMAPADR1 : PLX_REG_DMAPADR0) | |
313 | #define PLX_REG_DMAPADR0 0x0084 | |
314 | #define PLX_REG_DMAPADR1 0x0098 | |
315 | ||
316 | /* DMA Channel N Local Address Register (N <= 1) */ | |
317 | #define PLX_REG_DMALADR(n) ((n) ? PLX_REG_DMALADR1 : PLX_REG_DMALADR0) | |
318 | #define PLX_REG_DMALADR0 0x0088 | |
319 | #define PLX_REG_DMALADR1 0x009c | |
3d9f0739 | 320 | |
c644a11a IA |
321 | /* DMA Channel N Transfer Size (Bytes) Register (N <= 1) (first 23 bits) */ |
322 | #define PLX_REG_DMASIZ(n) ((n) ? PLX_REG_DMASIZ1 : PLX_REG_DMASIZ0) | |
323 | #define PLX_REG_DMASIZ0 0x008c | |
324 | #define PLX_REG_DMASIZ1 0x00a0 | |
3d9f0739 | 325 | |
c644a11a IA |
326 | /* DMA Channel N Descriptor Pointer Register (N <= 1) */ |
327 | #define PLX_REG_DMADPR(n) ((n) ? PLX_REG_DMADPR1 : PLX_REG_DMADPR0) | |
328 | #define PLX_REG_DMADPR0 0x0090 | |
329 | #define PLX_REG_DMADPR1 0x00a4 | |
3d9f0739 | 330 | |
e554840c MK |
331 | /* descriptor is located in pci space (not local space) */ |
332 | #define PLX_DESC_IN_PCI_BIT 0x1 | |
b6c77757 | 333 | #define PLX_END_OF_CHAIN_BIT 0x2 /* end of chain bit */ |
e554840c MK |
334 | /* interrupt when this descriptor's transfer is finished */ |
335 | #define PLX_INTR_TERM_COUNT 0x4 | |
336 | /* transfer from local to pci bus (not pci to local) */ | |
337 | #define PLX_XFER_LOCAL_TO_PCI 0x8 | |
3d9f0739 | 338 | |
c644a11a IA |
339 | /* DMA Channel N Command/Status Register (N <= 1) (8-bit) */ |
340 | #define PLX_REG_DMACSR(n) ((n) ? PLX_REG_DMACSR1 : PLX_REG_DMACSR0) | |
341 | #define PLX_REG_DMACSR0 0x00a8 | |
342 | #define PLX_REG_DMACSR1 0x00a9 | |
343 | ||
b6c77757 BP |
344 | #define PLX_DMA_EN_BIT 0x1 /* enable dma channel */ |
345 | #define PLX_DMA_START_BIT 0x2 /* start dma transfer */ | |
346 | #define PLX_DMA_ABORT_BIT 0x4 /* abort dma transfer */ | |
347 | #define PLX_CLEAR_DMA_INTR_BIT 0x8 /* clear dma interrupt */ | |
348 | #define PLX_DMA_DONE_BIT 0x10 /* transfer done status bit */ | |
3d9f0739 | 349 | |
c644a11a IA |
350 | /* DMA Threshold Register */ |
351 | #define PLX_REG_DMATHR 0x00b0 | |
352 | ||
353 | /* | |
354 | * Messaging Queue Registers OPLFIS, OPLFIM, IQP, OQP, MQCR, QBAR, IFHPR, | |
355 | * IFTPR, IPHPR, IPTPR, OFHPR, OFTPR, OPHPR, OPTPR, and QSR have been omitted. | |
356 | * They are used by the I2O feature. (IQP and OQP occupy the usual offsets of | |
357 | * the MBOX0 and MBOX1 registers if the I2O feature is enabled, but MBOX0 and | |
358 | * MBOX1 are accessible via alternative offsets. | |
359 | */ | |
360 | ||
361 | /* Queue Status/Control Register */ | |
362 | #define PLX_REG_QSR 0x00e8 | |
363 | ||
364 | /* Value of QSR after reset - disables I2O feature completely. */ | |
365 | #define PLX_QSR_VALUE_AFTER_RESET 0x00000050 | |
3d9f0739 DC |
366 | |
367 | /* | |
368 | * Accesses near the end of memory can cause the PLX chip | |
369 | * to pre-fetch data off of end-of-ram. Limit the size of | |
370 | * memory so host-side accesses cannot occur. | |
371 | */ | |
372 | ||
373 | #define PLX_PREFETCH 32 | |
374 | ||
b74a9670 | 375 | static inline int plx9080_abort_dma(void __iomem *iobase, unsigned int channel) |
3d9f0739 | 376 | { |
b74a9670 | 377 | void __iomem *dma_cs_addr; |
f6e9b914 | 378 | u8 dma_status; |
3d9f0739 DC |
379 | const int timeout = 10000; |
380 | unsigned int i; | |
381 | ||
c644a11a | 382 | dma_cs_addr = iobase + PLX_REG_DMACSR(channel); |
3d9f0739 | 383 | |
b6c77757 | 384 | /* abort dma transfer if necessary */ |
3d9f0739 | 385 | dma_status = readb(dma_cs_addr); |
82675f35 | 386 | if ((dma_status & PLX_DMA_EN_BIT) == 0) |
3d9f0739 | 387 | return 0; |
82675f35 | 388 | |
b6c77757 | 389 | /* wait to make sure done bit is zero */ |
3d9f0739 | 390 | for (i = 0; (dma_status & PLX_DMA_DONE_BIT) && i < timeout; i++) { |
5f74ea14 | 391 | udelay(1); |
3d9f0739 DC |
392 | dma_status = readb(dma_cs_addr); |
393 | } | |
3c643061 | 394 | if (i == timeout) |
3d9f0739 | 395 | return -ETIMEDOUT; |
3c643061 | 396 | |
b6c77757 | 397 | /* disable and abort channel */ |
3d9f0739 | 398 | writeb(PLX_DMA_ABORT_BIT, dma_cs_addr); |
b6c77757 | 399 | /* wait for dma done bit */ |
3d9f0739 DC |
400 | dma_status = readb(dma_cs_addr); |
401 | for (i = 0; (dma_status & PLX_DMA_DONE_BIT) == 0 && i < timeout; i++) { | |
5f74ea14 | 402 | udelay(1); |
3d9f0739 DC |
403 | dma_status = readb(dma_cs_addr); |
404 | } | |
3c643061 | 405 | if (i == timeout) |
3d9f0739 | 406 | return -ETIMEDOUT; |
3d9f0739 DC |
407 | |
408 | return 0; | |
409 | } | |
410 | ||
411 | #endif /* __COMEDI_PLX9080_H */ |