3 Hardware driver for NI Mite PCI interface chip
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1999 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
22 #include <linux/pci.h>
23 #include <linux/log2.h>
24 #include <linux/slab.h>
25 #include "../comedidev.h"
29 #define MAX_MITE_DMA_CHANNELS 8
31 struct mite_dma_descriptor {
38 struct mite_dma_descriptor_ring {
39 struct device *hw_dev;
41 struct mite_dma_descriptor *descriptors;
42 dma_addr_t descriptors_dma_addr;
46 struct mite_struct *mite;
50 struct mite_dma_descriptor_ring *ring;
54 struct pci_dev *pcidev;
55 resource_size_t mite_phys_addr;
56 void __iomem *mite_io_addr;
57 resource_size_t daq_phys_addr;
58 struct mite_channel channels[MAX_MITE_DMA_CHANNELS];
59 short channel_allocated[MAX_MITE_DMA_CHANNELS];
65 struct mite_struct *mite_alloc(struct pci_dev *pcidev);
67 int mite_setup2(struct comedi_device *, struct mite_struct *, bool use_win1);
69 static inline int mite_setup(struct comedi_device *dev,
70 struct mite_struct *mite)
72 return mite_setup2(dev, mite, false);
75 void mite_detach(struct mite_struct *mite);
76 struct mite_dma_descriptor_ring *mite_alloc_ring(struct mite_struct *mite);
77 void mite_free_ring(struct mite_dma_descriptor_ring *ring);
78 struct mite_channel *mite_request_channel_in_range(struct mite_struct *mite,
80 mite_dma_descriptor_ring
81 *ring, unsigned min_channel,
82 unsigned max_channel);
83 static inline struct mite_channel *mite_request_channel(struct mite_struct
86 mite_dma_descriptor_ring
89 return mite_request_channel_in_range(mite, ring, 0,
90 mite->num_channels - 1);
93 void mite_release_channel(struct mite_channel *mite_chan);
95 unsigned mite_dma_tcr(struct mite_channel *mite_chan);
96 void mite_dma_arm(struct mite_channel *mite_chan);
97 void mite_dma_disarm(struct mite_channel *mite_chan);
98 int mite_sync_input_dma(struct mite_channel *mite_chan,
99 struct comedi_subdevice *s);
100 int mite_sync_output_dma(struct mite_channel *mite_chan,
101 struct comedi_subdevice *s);
102 u32 mite_bytes_written_to_memory_lb(struct mite_channel *mite_chan);
103 u32 mite_bytes_written_to_memory_ub(struct mite_channel *mite_chan);
104 u32 mite_bytes_read_from_memory_lb(struct mite_channel *mite_chan);
105 u32 mite_bytes_read_from_memory_ub(struct mite_channel *mite_chan);
106 u32 mite_bytes_in_transit(struct mite_channel *mite_chan);
107 unsigned mite_get_status(struct mite_channel *mite_chan);
108 int mite_done(struct mite_channel *mite_chan);
110 void mite_prep_dma(struct mite_channel *mite_chan,
111 unsigned int num_device_bits, unsigned int num_memory_bits);
112 int mite_buf_change(struct mite_dma_descriptor_ring *ring,
113 struct comedi_subdevice *s);
115 enum mite_registers {
116 /* The bits 0x90180700 in MITE_UNKNOWN_DMA_BURST_REG can be
117 written and read back. The bits 0x1f always read as 1.
118 The rest always read as zero. */
119 MITE_UNKNOWN_DMA_BURST_REG = 0x28,
120 MITE_IODWBSR = 0xc0, /* IO Device Window Base Size Register */
121 MITE_IODWBSR_1 = 0xc4, /* IO Device Window Base Size Register 1 */
122 MITE_IODWCR_1 = 0xf4,
123 MITE_PCI_CONFIG_OFFSET = 0x300,
124 MITE_CSIGR = 0x460 /* chip signature */
127 #define MITE_CHAN(x) (0x500 + 0x100 * (x))
128 #define MITE_CHOR(x) (0x00 + MITE_CHAN(x)) /* channel operation */
129 #define MITE_CHCR(x) (0x04 + MITE_CHAN(x)) /* channel control */
130 #define MITE_TCR(x) (0x08 + MITE_CHAN(x)) /* transfer count */
131 #define MITE_MCR(x) (0x0c + MITE_CHAN(x)) /* memory configuration */
132 #define MITE_MAR(x) (0x10 + MITE_CHAN(x)) /* memory address */
133 #define MITE_DCR(x) (0x14 + MITE_CHAN(x)) /* device configuration */
134 #define MITE_DAR(x) (0x18 + MITE_CHAN(x)) /* device address */
135 #define MITE_LKCR(x) (0x1c + MITE_CHAN(x)) /* link configuration */
136 #define MITE_LKAR(x) (0x20 + MITE_CHAN(x)) /* link address */
137 #define MITE_LLKAR(x) (0x24 + MITE_CHAN(x)) /* see tnt5002 manual */
138 #define MITE_BAR(x) (0x28 + MITE_CHAN(x)) /* base address */
139 #define MITE_BCR(x) (0x2c + MITE_CHAN(x)) /* base count */
140 #define MITE_SAR(x) (0x30 + MITE_CHAN(x)) /* ? address */
141 #define MITE_WSCR(x) (0x34 + MITE_CHAN(x)) /* ? */
142 #define MITE_WSER(x) (0x38 + MITE_CHAN(x)) /* ? */
143 #define MITE_CHSR(x) (0x3c + MITE_CHAN(x)) /* channel status */
144 #define MITE_FCR(x) (0x40 + MITE_CHAN(x)) /* fifo count */
146 enum MITE_IODWBSR_bits {
147 WENAB = 0x80, /* window enable */
150 static inline unsigned MITE_IODWBSR_1_WSIZE_bits(unsigned size)
157 return (order - 1) & 0x1f;
160 enum MITE_UNKNOWN_DMA_BURST_bits {
161 UNKNOWN_DMA_BURST_ENABLE_BITS = 0x600
164 static inline int mite_csigr_version(u32 csigr_bits)
166 return csigr_bits & 0xf;
169 static inline int mite_csigr_type(u32 csigr_bits)
170 { /* original mite = 0, minimite = 1 */
171 return (csigr_bits >> 4) & 0xf;
174 static inline int mite_csigr_mmode(u32 csigr_bits)
175 { /* mite mode, minimite = 1 */
176 return (csigr_bits >> 8) & 0x3;
179 static inline int mite_csigr_imode(u32 csigr_bits)
180 { /* cpu port interface mode, pci = 0x3 */
181 return (csigr_bits >> 12) & 0x3;
184 static inline int mite_csigr_dmac(u32 csigr_bits)
185 { /* number of dma channels */
186 return (csigr_bits >> 16) & 0xf;
189 static inline int mite_csigr_wpdep(u32 csigr_bits)
190 { /* write post fifo depth */
191 unsigned int wpdep_bits = (csigr_bits >> 20) & 0x7;
193 return (wpdep_bits) ? (1 << (wpdep_bits - 1)) : 0;
196 static inline int mite_csigr_wins(u32 csigr_bits)
198 return (csigr_bits >> 24) & 0x1f;
201 static inline int mite_csigr_iowins(u32 csigr_bits)
202 { /* number of io windows */
203 return (csigr_bits >> 29) & 0x7;
211 DCR_NORMAL = (1 << 29),
215 enum MITE_CHOR_bits {
216 CHOR_DMARESET = (1 << 31),
217 CHOR_SET_SEND_TC = (1 << 11),
218 CHOR_CLR_SEND_TC = (1 << 10),
219 CHOR_SET_LPAUSE = (1 << 9),
220 CHOR_CLR_LPAUSE = (1 << 8),
221 CHOR_CLRDONE = (1 << 7),
222 CHOR_CLRRB = (1 << 6),
223 CHOR_CLRLC = (1 << 5),
224 CHOR_FRESET = (1 << 4),
225 CHOR_ABORT = (1 << 3), /* stop without emptying fifo */
226 CHOR_STOP = (1 << 2), /* stop after emptying fifo */
227 CHOR_CONT = (1 << 1),
228 CHOR_START = (1 << 0),
229 CHOR_PON = (CHOR_CLR_SEND_TC | CHOR_CLR_LPAUSE),
232 enum MITE_CHCR_bits {
233 CHCR_SET_DMA_IE = (1 << 31),
234 CHCR_CLR_DMA_IE = (1 << 30),
235 CHCR_SET_LINKP_IE = (1 << 29),
236 CHCR_CLR_LINKP_IE = (1 << 28),
237 CHCR_SET_SAR_IE = (1 << 27),
238 CHCR_CLR_SAR_IE = (1 << 26),
239 CHCR_SET_DONE_IE = (1 << 25),
240 CHCR_CLR_DONE_IE = (1 << 24),
241 CHCR_SET_MRDY_IE = (1 << 23),
242 CHCR_CLR_MRDY_IE = (1 << 22),
243 CHCR_SET_DRDY_IE = (1 << 21),
244 CHCR_CLR_DRDY_IE = (1 << 20),
245 CHCR_SET_LC_IE = (1 << 19),
246 CHCR_CLR_LC_IE = (1 << 18),
247 CHCR_SET_CONT_RB_IE = (1 << 17),
248 CHCR_CLR_CONT_RB_IE = (1 << 16),
249 CHCR_FIFODIS = (1 << 15),
251 CHCR_BURSTEN = (1 << 14),
253 CHCR_BYTE_SWAP_DEVICE = (1 << 6),
254 CHCR_BYTE_SWAP_MEMORY = (1 << 4),
256 CHCR_DEV_TO_MEM = CHCR_DIR,
258 CHCR_NORMAL = (0 << 0),
259 CHCR_CONTINUE = (1 << 0),
260 CHCR_RINGBUFF = (2 << 0),
261 CHCR_LINKSHORT = (4 << 0),
262 CHCR_LINKLONG = (5 << 0),
264 (CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE |
265 CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE |
266 CHCR_CLR_LC_IE | CHCR_CLR_CONT_RB_IE),
269 enum ConfigRegister_bits {
270 CR_REQS_MASK = 0x7 << 16,
271 CR_ASEQDONT = 0x0 << 10,
272 CR_ASEQUP = 0x1 << 10,
273 CR_ASEQDOWN = 0x2 << 10,
274 CR_ASEQ_MASK = 0x3 << 10,
275 CR_PSIZE8 = (1 << 8),
276 CR_PSIZE16 = (2 << 8),
277 CR_PSIZE32 = (3 << 8),
278 CR_PORTCPU = (0 << 6),
279 CR_PORTIO = (1 << 6),
280 CR_PORTVXI = (2 << 6),
281 CR_PORTMXI = (3 << 6),
282 CR_AMDEVICE = (1 << 0),
284 static inline int CR_REQS(int source)
286 return (source & 0x7) << 16;
289 static inline int CR_REQSDRQ(unsigned drq_line)
291 /* This also works on m-series when
292 using channels (drq_line) 4 or 5. */
293 return CR_REQS((drq_line & 0x3) | 0x4);
296 static inline int CR_RL(unsigned int retry_limit)
301 value = 1 + ilog2(retry_limit);
304 return (value & 0x7) << 21;
308 CHSR_INT = (1 << 31),
309 CHSR_LPAUSES = (1 << 29),
310 CHSR_SARS = (1 << 27),
311 CHSR_DONE = (1 << 25),
312 CHSR_MRDY = (1 << 23),
313 CHSR_DRDY = (1 << 21),
314 CHSR_LINKC = (1 << 19),
315 CHSR_CONTS_RB = (1 << 17),
316 CHSR_ERROR = (1 << 15),
317 CHSR_SABORT = (1 << 14),
318 CHSR_HABORT = (1 << 13),
319 CHSR_STOPS = (1 << 12),
320 CHSR_OPERR_mask = (3 << 10),
321 CHSR_OPERR_NOERROR = (0 << 10),
322 CHSR_OPERR_FIFOERROR = (1 << 10),
323 CHSR_OPERR_LINKERROR = (1 << 10), /* ??? */
324 CHSR_XFERR = (1 << 9),
326 CHSR_DRQ1 = (1 << 7),
327 CHSR_DRQ0 = (1 << 6),
328 CHSR_LxERR_mask = (3 << 4),
329 CHSR_LBERR = (1 << 4),
330 CHSR_LRERR = (2 << 4),
331 CHSR_LOERR = (3 << 4),
332 CHSR_MxERR_mask = (3 << 2),
333 CHSR_MBERR = (1 << 2),
334 CHSR_MRERR = (2 << 2),
335 CHSR_MOERR = (3 << 2),
336 CHSR_DxERR_mask = (3 << 0),
337 CHSR_DBERR = (1 << 0),
338 CHSR_DRERR = (2 << 0),
339 CHSR_DOERR = (3 << 0),
342 static inline void mite_dma_reset(struct mite_channel *mite_chan)
344 writel(CHOR_DMARESET | CHOR_FRESET,
345 mite_chan->mite->mite_io_addr + MITE_CHOR(mite_chan->channel));