2 * include/asm-xtensa/variant-s6000/dmac.h
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
8 * Copyright (C) 2006 Tensilica Inc.
9 * Copyright (C) 2008 Emlix GmbH <info@emlix.com>
10 * Authors: Fabian Godehardt <fg@emlix.com>
11 * Oskar Schirmer <os@emlix.com>
12 * Daniel Gloeckner <dg@emlix.com>
15 #ifndef __ASM_XTENSA_S6000_DMAC_H
16 #define __ASM_XTENSA_S6000_DMAC_H
18 #include <variant/hardware.h>
22 #define S6_DMA_INTSTAT0 0x000
23 #define S6_DMA_INTSTAT1 0x004
24 #define S6_DMA_INTENABLE0 0x008
25 #define S6_DMA_INTENABLE1 0x00C
26 #define S6_DMA_INTRAW0 0x010
27 #define S6_DMA_INTRAW1 0x014
28 #define S6_DMA_INTCLEAR0 0x018
29 #define S6_DMA_INTCLEAR1 0x01C
30 #define S6_DMA_INTSET0 0x020
31 #define S6_DMA_INTSET1 0x024
32 #define S6_DMA_INT0_UNDER 0
33 #define S6_DMA_INT0_OVER 16
34 #define S6_DMA_INT1_CHANNEL 0
35 #define S6_DMA_INT1_MASTER 16
36 #define S6_DMA_INT1_MASTER_MASK 7
37 #define S6_DMA_TERMCNTIRQSTAT 0x028
38 #define S6_DMA_TERMCNTIRQCLR 0x02C
39 #define S6_DMA_TERMCNTIRQSET 0x030
40 #define S6_DMA_PENDCNTIRQSTAT 0x034
41 #define S6_DMA_PENDCNTIRQCLR 0x038
42 #define S6_DMA_PENDCNTIRQSET 0x03C
43 #define S6_DMA_LOWWMRKIRQSTAT 0x040
44 #define S6_DMA_LOWWMRKIRQCLR 0x044
45 #define S6_DMA_LOWWMRKIRQSET 0x048
46 #define S6_DMA_MASTERERRINFO 0x04C
47 #define S6_DMA_MASTERERR_CHAN(n) (4*(n))
48 #define S6_DMA_MASTERERR_CHAN_MASK 0xF
49 #define S6_DMA_DESCRFIFO0 0x050
50 #define S6_DMA_DESCRFIFO1 0x054
51 #define S6_DMA_DESCRFIFO2 0x058
52 #define S6_DMA_DESCRFIFO2_AUTODISABLE 24
53 #define S6_DMA_DESCRFIFO3 0x05C
54 #define S6_DMA_MASTER0START 0x060
55 #define S6_DMA_MASTER0END 0x064
56 #define S6_DMA_MASTER1START 0x068
57 #define S6_DMA_MASTER1END 0x06C
58 #define S6_DMA_NEXTFREE 0x070
59 #define S6_DMA_NEXTFREE_CHAN 0
60 #define S6_DMA_NEXTFREE_CHAN_MASK 0x1F
61 #define S6_DMA_NEXTFREE_ENA 16
62 #define S6_DMA_NEXTFREE_ENA_MASK ((1 << 16) - 1)
63 #define S6_DMA_DPORTCTRLGRP(p) ((p) * 4 + 0x074)
64 #define S6_DMA_DPORTCTRLGRP_FRAMEREP 0
65 #define S6_DMA_DPORTCTRLGRP_NRCHANS 1
66 #define S6_DMA_DPORTCTRLGRP_NRCHANS_1 0
67 #define S6_DMA_DPORTCTRLGRP_NRCHANS_3 1
68 #define S6_DMA_DPORTCTRLGRP_NRCHANS_4 2
69 #define S6_DMA_DPORTCTRLGRP_NRCHANS_2 3
70 #define S6_DMA_DPORTCTRLGRP_ENA 31
75 #define DMA_CHNL(dmac, n) ((dmac) + 0x1000 + (n) * 0x100)
76 #define DMA_INDEX_CHNL(addr) (((addr) >> 8) & 0xF)
77 #define DMA_MASK_DMAC(addr) ((addr) & 0xFFFF0000)
78 #define S6_DMA_CHNCTRL 0x000
79 #define S6_DMA_CHNCTRL_ENABLE 0
80 #define S6_DMA_CHNCTRL_PAUSE 1
81 #define S6_DMA_CHNCTRL_PRIO 2
82 #define S6_DMA_CHNCTRL_PRIO_MASK 3
83 #define S6_DMA_CHNCTRL_PERIPHXFER 4
84 #define S6_DMA_CHNCTRL_PERIPHENA 5
85 #define S6_DMA_CHNCTRL_SRCINC 6
86 #define S6_DMA_CHNCTRL_DSTINC 7
87 #define S6_DMA_CHNCTRL_BURSTLOG 8
88 #define S6_DMA_CHNCTRL_BURSTLOG_MASK 7
89 #define S6_DMA_CHNCTRL_DESCFIFODEPTH 12
90 #define S6_DMA_CHNCTRL_DESCFIFODEPTH_MASK 0x1F
91 #define S6_DMA_CHNCTRL_DESCFIFOFULL 17
92 #define S6_DMA_CHNCTRL_BWCONSEL 18
93 #define S6_DMA_CHNCTRL_BWCONENA 19
94 #define S6_DMA_CHNCTRL_PENDGCNTSTAT 20
95 #define S6_DMA_CHNCTRL_PENDGCNTSTAT_MASK 0x3F
96 #define S6_DMA_CHNCTRL_LOWWMARK 26
97 #define S6_DMA_CHNCTRL_LOWWMARK_MASK 0xF
98 #define S6_DMA_CHNCTRL_TSTAMP 30
99 #define S6_DMA_TERMCNTNB 0x004
100 #define S6_DMA_TERMCNTNB_MASK 0xFFFF
101 #define S6_DMA_TERMCNTTMO 0x008
102 #define S6_DMA_TERMCNTSTAT 0x00C
103 #define S6_DMA_TERMCNTSTAT_MASK 0xFF
104 #define S6_DMA_CMONCHUNK 0x010
105 #define S6_DMA_SRCSKIP 0x014
106 #define S6_DMA_DSTSKIP 0x018
107 #define S6_DMA_CUR_SRC 0x024
108 #define S6_DMA_CUR_DST 0x028
109 #define S6_DMA_TIMESTAMP 0x030
111 /* DMA channel lists */
113 #define S6_DPDMA_CHAN(stream, channel) (4 * (stream) + (channel))
114 #define S6_DPDMA_NB 16
116 #define S6_HIFDMA_GMACTX 0
117 #define S6_HIFDMA_GMACRX 1
118 #define S6_HIFDMA_I2S0 2
119 #define S6_HIFDMA_I2S1 3
120 #define S6_HIFDMA_EGIB 4
121 #define S6_HIFDMA_PCITX 5
122 #define S6_HIFDMA_PCIRX 6
123 #define S6_HIFDMA_NB 7
125 #define S6_NIDMA_NB 4
127 #define S6_LMSDMA_NB 12
129 /* controller access */
132 #define S6_DMAC_INDEX(dmac) (((unsigned)(dmac) >> 18) % S6_DMAC_NB)
140 extern struct s6dmac_ctrl s6dmac_ctrl[S6_DMAC_NB];
143 /* DMA control, per channel */
145 static inline int s6dmac_fifo_full(u32 dmac, int chan)
147 return (readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
148 & (1 << S6_DMA_CHNCTRL_DESCFIFOFULL)) && 1;
151 static inline int s6dmac_termcnt_irq(u32 dmac, int chan)
154 int r = (readl(dmac + S6_DMA_TERMCNTIRQSTAT) & m) && 1;
156 writel(m, dmac + S6_DMA_TERMCNTIRQCLR);
160 static inline int s6dmac_pendcnt_irq(u32 dmac, int chan)
163 int r = (readl(dmac + S6_DMA_PENDCNTIRQSTAT) & m) && 1;
165 writel(m, dmac + S6_DMA_PENDCNTIRQCLR);
169 static inline int s6dmac_lowwmark_irq(u32 dmac, int chan)
171 int r = (readl(dmac + S6_DMA_LOWWMRKIRQSTAT) & (1 << chan)) ? 1 : 0;
173 writel(1 << chan, dmac + S6_DMA_LOWWMRKIRQCLR);
177 static inline u32 s6dmac_pending_count(u32 dmac, int chan)
179 return (readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
180 >> S6_DMA_CHNCTRL_PENDGCNTSTAT)
181 & S6_DMA_CHNCTRL_PENDGCNTSTAT_MASK;
184 static inline void s6dmac_set_terminal_count(u32 dmac, int chan, u32 n)
186 n &= S6_DMA_TERMCNTNB_MASK;
187 n |= readl(DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB)
188 & ~S6_DMA_TERMCNTNB_MASK;
189 writel(n, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB);
192 static inline u32 s6dmac_get_terminal_count(u32 dmac, int chan)
194 return (readl(DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB))
195 & S6_DMA_TERMCNTNB_MASK;
198 static inline u32 s6dmac_timestamp(u32 dmac, int chan)
200 return readl(DMA_CHNL(dmac, chan) + S6_DMA_TIMESTAMP);
203 static inline u32 s6dmac_cur_src(u32 dmac, int chan)
205 return readl(DMA_CHNL(dmac, chan) + S6_DMA_CUR_SRC);
208 static inline u32 s6dmac_cur_dst(u32 dmac, int chan)
210 return readl(DMA_CHNL(dmac, chan) + S6_DMA_CUR_DST);
213 static inline void s6dmac_disable_chan(u32 dmac, int chan)
216 writel(readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
217 & ~(1 << S6_DMA_CHNCTRL_ENABLE),
218 DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
220 ctrl = readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
221 while (ctrl & (1 << S6_DMA_CHNCTRL_ENABLE));
224 static inline void s6dmac_set_stride_skip(u32 dmac, int chan,
225 int comchunk, /* 0: disable scatter/gather */
226 int srcskip, int dstskip)
228 writel(comchunk, DMA_CHNL(dmac, chan) + S6_DMA_CMONCHUNK);
229 writel(srcskip, DMA_CHNL(dmac, chan) + S6_DMA_SRCSKIP);
230 writel(dstskip, DMA_CHNL(dmac, chan) + S6_DMA_DSTSKIP);
233 static inline void s6dmac_enable_chan(u32 dmac, int chan,
234 int prio, /* 0 (highest) .. 3 (lowest) */
235 int periphxfer, /* <0: disable p.req.line, 0..1: mode */
236 int srcinc, int dstinc, /* 0: dont increment src/dst address */
237 int comchunk, /* 0: disable scatter/gather */
238 int srcskip, int dstskip,
239 int burstsize, /* 4 for I2S, 7 for everything else */
240 int bandwidthconserve, /* <0: disable, 0..1: select */
241 int lowwmark, /* 0..15 */
242 int timestamp, /* 0: disable timestamp */
243 int enable) /* 0: disable for now */
245 writel(1, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB);
246 writel(0, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTTMO);
247 writel(lowwmark << S6_DMA_CHNCTRL_LOWWMARK,
248 DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
249 s6dmac_set_stride_skip(dmac, chan, comchunk, srcskip, dstskip);
250 writel(((enable ? 1 : 0) << S6_DMA_CHNCTRL_ENABLE) |
251 (prio << S6_DMA_CHNCTRL_PRIO) |
252 (((periphxfer > 0) ? 1 : 0) << S6_DMA_CHNCTRL_PERIPHXFER) |
253 (((periphxfer < 0) ? 0 : 1) << S6_DMA_CHNCTRL_PERIPHENA) |
254 ((srcinc ? 1 : 0) << S6_DMA_CHNCTRL_SRCINC) |
255 ((dstinc ? 1 : 0) << S6_DMA_CHNCTRL_DSTINC) |
256 (burstsize << S6_DMA_CHNCTRL_BURSTLOG) |
257 (((bandwidthconserve > 0) ? 1 : 0) << S6_DMA_CHNCTRL_BWCONSEL) |
258 (((bandwidthconserve < 0) ? 0 : 1) << S6_DMA_CHNCTRL_BWCONENA) |
259 (lowwmark << S6_DMA_CHNCTRL_LOWWMARK) |
260 ((timestamp ? 1 : 0) << S6_DMA_CHNCTRL_TSTAMP),
261 DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
265 /* DMA control, per engine */
267 static inline unsigned _dmac_addr_index(u32 dmac)
269 unsigned i = S6_DMAC_INDEX(dmac);
270 if (s6dmac_ctrl[i].dmac != dmac)
275 static inline void _s6dmac_disable_error_irqs(u32 dmac, u32 mask)
277 writel(mask, dmac + S6_DMA_TERMCNTIRQCLR);
278 writel(mask, dmac + S6_DMA_PENDCNTIRQCLR);
279 writel(mask, dmac + S6_DMA_LOWWMRKIRQCLR);
280 writel(readl(dmac + S6_DMA_INTENABLE0)
281 & ~((mask << S6_DMA_INT0_UNDER) | (mask << S6_DMA_INT0_OVER)),
282 dmac + S6_DMA_INTENABLE0);
283 writel(readl(dmac + S6_DMA_INTENABLE1) & ~(mask << S6_DMA_INT1_CHANNEL),
284 dmac + S6_DMA_INTENABLE1);
285 writel((mask << S6_DMA_INT0_UNDER) | (mask << S6_DMA_INT0_OVER),
286 dmac + S6_DMA_INTCLEAR0);
287 writel(mask << S6_DMA_INT1_CHANNEL, dmac + S6_DMA_INTCLEAR1);
291 * request channel from specified engine
292 * with chan<0, accept any channel
293 * further parameters see s6dmac_enable_chan
294 * returns < 0 upon error, channel nb otherwise
296 static inline int s6dmac_request_chan(u32 dmac, int chan,
299 int srcinc, int dstinc,
301 int srcskip, int dstskip,
303 int bandwidthconserve,
310 spinlock_t *spinl = &s6dmac_ctrl[_dmac_addr_index(dmac)].lock;
311 spin_lock_irqsave(spinl, flags);
313 r = (readl(dmac + S6_DMA_NEXTFREE) >> S6_DMA_NEXTFREE_CHAN)
314 & S6_DMA_NEXTFREE_CHAN_MASK;
316 if (r >= s6dmac_ctrl[_dmac_addr_index(dmac)].chan_nb) {
321 } else if (((readl(dmac + S6_DMA_NEXTFREE) >> S6_DMA_NEXTFREE_ENA)
325 s6dmac_enable_chan(dmac, r, prio, periphxfer,
326 srcinc, dstinc, comchunk, srcskip, dstskip, burstsize,
327 bandwidthconserve, lowwmark, timestamp, enable);
329 spin_unlock_irqrestore(spinl, flags);
333 static inline void s6dmac_put_fifo(u32 dmac, int chan,
334 u32 src, u32 dst, u32 size)
337 spinlock_t *spinl = &s6dmac_ctrl[_dmac_addr_index(dmac)].lock;
338 spin_lock_irqsave(spinl, flags);
339 writel(src, dmac + S6_DMA_DESCRFIFO0);
340 writel(dst, dmac + S6_DMA_DESCRFIFO1);
341 writel(size, dmac + S6_DMA_DESCRFIFO2);
342 writel(chan, dmac + S6_DMA_DESCRFIFO3);
343 spin_unlock_irqrestore(spinl, flags);
346 static inline u32 s6dmac_channel_enabled(u32 dmac, int chan)
348 return readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL) &
349 (1 << S6_DMA_CHNCTRL_ENABLE);
353 * group 1-4 data port channels
354 * with port=0..3, nrch=1-4 channels,
355 * frrep=0/1 (dis- or enable frame repeat)
357 static inline void s6dmac_dp_setup_group(u32 dmac, int port,
360 const static u8 mask[4] = {0, 3, 1, 2};
361 BUG_ON(dmac != S6_REG_DPDMA);
362 if ((port < 0) || (port > 3) || (nrch < 1) || (nrch > 4))
364 writel((mask[nrch - 1] << S6_DMA_DPORTCTRLGRP_NRCHANS)
365 | ((frrep ? 1 : 0) << S6_DMA_DPORTCTRLGRP_FRAMEREP),
366 dmac + S6_DMA_DPORTCTRLGRP(port));
369 static inline void s6dmac_dp_switch_group(u32 dmac, int port, int enable)
372 BUG_ON(dmac != S6_REG_DPDMA);
373 tmp = readl(dmac + S6_DMA_DPORTCTRLGRP(port));
375 tmp |= (1 << S6_DMA_DPORTCTRLGRP_ENA);
377 tmp &= ~(1 << S6_DMA_DPORTCTRLGRP_ENA);
378 writel(tmp, dmac + S6_DMA_DPORTCTRLGRP(port));
381 extern void s6dmac_put_fifo_cache(u32 dmac, int chan,
382 u32 src, u32 dst, u32 size);
383 extern void s6dmac_disable_error_irqs(u32 dmac, u32 mask);
384 extern u32 s6dmac_int_sources(u32 dmac, u32 channel);
385 extern void s6dmac_release_chan(u32 dmac, int chan);
387 #endif /* __ASM_XTENSA_S6000_DMAC_H */