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/*
* include/asm-xtensa/variant-s6000/dmac.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 Tensilica Inc.
* Copyright (C) 2008 Emlix GmbH <info@emlix.com>
* Authors: Fabian Godehardt <fg@emlix.com>
* Oskar Schirmer <oskar@scara.com>
* Daniel Gloeckner <dg@emlix.com>
*/
#ifndef __ASM_XTENSA_S6000_DMAC_H
#define __ASM_XTENSA_S6000_DMAC_H
#include <linux/io.h>
#include <variant/hardware.h>
/* DMA global */
#define S6_DMA_INTSTAT0 0x000
#define S6_DMA_INTSTAT1 0x004
#define S6_DMA_INTENABLE0 0x008
#define S6_DMA_INTENABLE1 0x00C
#define S6_DMA_INTRAW0 0x010
#define S6_DMA_INTRAW1 0x014
#define S6_DMA_INTCLEAR0 0x018
#define S6_DMA_INTCLEAR1 0x01C
#define S6_DMA_INTSET0 0x020
#define S6_DMA_INTSET1 0x024
#define S6_DMA_INT0_UNDER 0
#define S6_DMA_INT0_OVER 16
#define S6_DMA_INT1_CHANNEL 0
#define S6_DMA_INT1_MASTER 16
#define S6_DMA_INT1_MASTER_MASK 7
#define S6_DMA_TERMCNTIRQSTAT 0x028
#define S6_DMA_TERMCNTIRQCLR 0x02C
#define S6_DMA_TERMCNTIRQSET 0x030
#define S6_DMA_PENDCNTIRQSTAT 0x034
#define S6_DMA_PENDCNTIRQCLR 0x038
#define S6_DMA_PENDCNTIRQSET 0x03C
#define S6_DMA_LOWWMRKIRQSTAT 0x040
#define S6_DMA_LOWWMRKIRQCLR 0x044
#define S6_DMA_LOWWMRKIRQSET 0x048
#define S6_DMA_MASTERERRINFO 0x04C
#define S6_DMA_MASTERERR_CHAN(n) (4*(n))
#define S6_DMA_MASTERERR_CHAN_MASK 0xF
#define S6_DMA_DESCRFIFO0 0x050
#define S6_DMA_DESCRFIFO1 0x054
#define S6_DMA_DESCRFIFO2 0x058
#define S6_DMA_DESCRFIFO2_AUTODISABLE 24
#define S6_DMA_DESCRFIFO3 0x05C
#define S6_DMA_MASTER0START 0x060
#define S6_DMA_MASTER0END 0x064
#define S6_DMA_MASTER1START 0x068
#define S6_DMA_MASTER1END 0x06C
#define S6_DMA_NEXTFREE 0x070
#define S6_DMA_NEXTFREE_CHAN 0
#define S6_DMA_NEXTFREE_CHAN_MASK 0x1F
#define S6_DMA_NEXTFREE_ENA 16
#define S6_DMA_NEXTFREE_ENA_MASK ((1 << 16) - 1)
#define S6_DMA_DPORTCTRLGRP(p) ((p) * 4 + 0x074)
#define S6_DMA_DPORTCTRLGRP_FRAMEREP 0
#define S6_DMA_DPORTCTRLGRP_NRCHANS 1
#define S6_DMA_DPORTCTRLGRP_NRCHANS_1 0
#define S6_DMA_DPORTCTRLGRP_NRCHANS_3 1
#define S6_DMA_DPORTCTRLGRP_NRCHANS_4 2
#define S6_DMA_DPORTCTRLGRP_NRCHANS_2 3
#define S6_DMA_DPORTCTRLGRP_ENA 31
/* DMA per channel */
#define DMA_CHNL(dmac, n) ((dmac) + 0x1000 + (n) * 0x100)
#define DMA_INDEX_CHNL(addr) (((addr) >> 8) & 0xF)
#define DMA_MASK_DMAC(addr) ((addr) & 0xFFFF0000)
#define S6_DMA_CHNCTRL 0x000
#define S6_DMA_CHNCTRL_ENABLE 0
#define S6_DMA_CHNCTRL_PAUSE 1
#define S6_DMA_CHNCTRL_PRIO 2
#define S6_DMA_CHNCTRL_PRIO_MASK 3
#define S6_DMA_CHNCTRL_PERIPHXFER 4
#define S6_DMA_CHNCTRL_PERIPHENA 5
#define S6_DMA_CHNCTRL_SRCINC 6
#define S6_DMA_CHNCTRL_DSTINC 7
#define S6_DMA_CHNCTRL_BURSTLOG 8
#define S6_DMA_CHNCTRL_BURSTLOG_MASK 7
#define S6_DMA_CHNCTRL_DESCFIFODEPTH 12
#define S6_DMA_CHNCTRL_DESCFIFODEPTH_MASK 0x1F
#define S6_DMA_CHNCTRL_DESCFIFOFULL 17
#define S6_DMA_CHNCTRL_BWCONSEL 18
#define S6_DMA_CHNCTRL_BWCONENA 19
#define S6_DMA_CHNCTRL_PENDGCNTSTAT 20
#define S6_DMA_CHNCTRL_PENDGCNTSTAT_MASK 0x3F
#define S6_DMA_CHNCTRL_LOWWMARK 26
#define S6_DMA_CHNCTRL_LOWWMARK_MASK 0xF
#define S6_DMA_CHNCTRL_TSTAMP 30
#define S6_DMA_TERMCNTNB 0x004
#define S6_DMA_TERMCNTNB_MASK 0xFFFF
#define S6_DMA_TERMCNTTMO 0x008
#define S6_DMA_TERMCNTSTAT 0x00C
#define S6_DMA_TERMCNTSTAT_MASK 0xFF
#define S6_DMA_CMONCHUNK 0x010
#define S6_DMA_SRCSKIP 0x014
#define S6_DMA_DSTSKIP 0x018
#define S6_DMA_CUR_SRC 0x024
#define S6_DMA_CUR_DST 0x028
#define S6_DMA_TIMESTAMP 0x030
/* DMA channel lists */
#define S6_DPDMA_CHAN(stream, channel) (4 * (stream) + (channel))
#define S6_DPDMA_NB 16
#define S6_HIFDMA_GMACTX 0
#define S6_HIFDMA_GMACRX 1
#define S6_HIFDMA_I2S0 2
#define S6_HIFDMA_I2S1 3
#define S6_HIFDMA_EGIB 4
#define S6_HIFDMA_PCITX 5
#define S6_HIFDMA_PCIRX 6
#define S6_HIFDMA_NB 7
#define S6_NIDMA_NB 4
#define S6_LMSDMA_NB 12
/* controller access */
#define S6_DMAC_NB 4
#define S6_DMAC_INDEX(dmac) (((unsigned)(dmac) >> 18) % S6_DMAC_NB)
struct s6dmac_ctrl {
u32 dmac;
spinlock_t lock;
u8 chan_nb;
};
extern struct s6dmac_ctrl s6dmac_ctrl[S6_DMAC_NB];
/* DMA control, per channel */
static inline int s6dmac_fifo_full(u32 dmac, int chan)
{
return (readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
& (1 << S6_DMA_CHNCTRL_DESCFIFOFULL)) && 1;
}
static inline int s6dmac_termcnt_irq(u32 dmac, int chan)
{
u32 m = 1 << chan;
int r = (readl(dmac + S6_DMA_TERMCNTIRQSTAT) & m) && 1;
if (r)
writel(m, dmac + S6_DMA_TERMCNTIRQCLR);
return r;
}
static inline int s6dmac_pendcnt_irq(u32 dmac, int chan)
{
u32 m = 1 << chan;
int r = (readl(dmac + S6_DMA_PENDCNTIRQSTAT) & m) && 1;
if (r)
writel(m, dmac + S6_DMA_PENDCNTIRQCLR);
return r;
}
static inline int s6dmac_lowwmark_irq(u32 dmac, int chan)
{
int r = (readl(dmac + S6_DMA_LOWWMRKIRQSTAT) & (1 << chan)) ? 1 : 0;
if (r)
writel(1 << chan, dmac + S6_DMA_LOWWMRKIRQCLR);
return r;
}
static inline u32 s6dmac_pending_count(u32 dmac, int chan)
{
return (readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
>> S6_DMA_CHNCTRL_PENDGCNTSTAT)
& S6_DMA_CHNCTRL_PENDGCNTSTAT_MASK;
}
static inline void s6dmac_set_terminal_count(u32 dmac, int chan, u32 n)
{
n &= S6_DMA_TERMCNTNB_MASK;
n |= readl(DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB)
& ~S6_DMA_TERMCNTNB_MASK;
writel(n, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB);
}
static inline u32 s6dmac_get_terminal_count(u32 dmac, int chan)
{
return (readl(DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB))
& S6_DMA_TERMCNTNB_MASK;
}
static inline u32 s6dmac_timestamp(u32 dmac, int chan)
{
return readl(DMA_CHNL(dmac, chan) + S6_DMA_TIMESTAMP);
}
static inline u32 s6dmac_cur_src(u32 dmac, int chan)
{
return readl(DMA_CHNL(dmac, chan) + S6_DMA_CUR_SRC);
}
static inline u32 s6dmac_cur_dst(u32 dmac, int chan)
{
return readl(DMA_CHNL(dmac, chan) + S6_DMA_CUR_DST);
}
static inline void s6dmac_disable_chan(u32 dmac, int chan)
{
u32 ctrl;
writel(readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL)
& ~(1 << S6_DMA_CHNCTRL_ENABLE),
DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
do
ctrl = readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
while (ctrl & (1 << S6_DMA_CHNCTRL_ENABLE));
}
static inline void s6dmac_set_stride_skip(u32 dmac, int chan,
int comchunk, /* 0: disable scatter/gather */
int srcskip, int dstskip)
{
writel(comchunk, DMA_CHNL(dmac, chan) + S6_DMA_CMONCHUNK);
writel(srcskip, DMA_CHNL(dmac, chan) + S6_DMA_SRCSKIP);
writel(dstskip, DMA_CHNL(dmac, chan) + S6_DMA_DSTSKIP);
}
static inline void s6dmac_enable_chan(u32 dmac, int chan,
int prio, /* 0 (highest) .. 3 (lowest) */
int periphxfer, /* <0: disable p.req.line, 0..1: mode */
int srcinc, int dstinc, /* 0: dont increment src/dst address */
int comchunk, /* 0: disable scatter/gather */
int srcskip, int dstskip,
int burstsize, /* 4 for I2S, 7 for everything else */
int bandwidthconserve, /* <0: disable, 0..1: select */
int lowwmark, /* 0..15 */
int timestamp, /* 0: disable timestamp */
int enable) /* 0: disable for now */
{
writel(1, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTNB);
writel(0, DMA_CHNL(dmac, chan) + S6_DMA_TERMCNTTMO);
writel(lowwmark << S6_DMA_CHNCTRL_LOWWMARK,
DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
s6dmac_set_stride_skip(dmac, chan, comchunk, srcskip, dstskip);
writel(((enable ? 1 : 0) << S6_DMA_CHNCTRL_ENABLE) |
(prio << S6_DMA_CHNCTRL_PRIO) |
(((periphxfer > 0) ? 1 : 0) << S6_DMA_CHNCTRL_PERIPHXFER) |
(((periphxfer < 0) ? 0 : 1) << S6_DMA_CHNCTRL_PERIPHENA) |
((srcinc ? 1 : 0) << S6_DMA_CHNCTRL_SRCINC) |
((dstinc ? 1 : 0) << S6_DMA_CHNCTRL_DSTINC) |
(burstsize << S6_DMA_CHNCTRL_BURSTLOG) |
(((bandwidthconserve > 0) ? 1 : 0) << S6_DMA_CHNCTRL_BWCONSEL) |
(((bandwidthconserve < 0) ? 0 : 1) << S6_DMA_CHNCTRL_BWCONENA) |
(lowwmark << S6_DMA_CHNCTRL_LOWWMARK) |
((timestamp ? 1 : 0) << S6_DMA_CHNCTRL_TSTAMP),
DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL);
}
/* DMA control, per engine */
static inline unsigned _dmac_addr_index(u32 dmac)
{
unsigned i = S6_DMAC_INDEX(dmac);
if (s6dmac_ctrl[i].dmac != dmac)
BUG();
return i;
}
static inline void _s6dmac_disable_error_irqs(u32 dmac, u32 mask)
{
writel(mask, dmac + S6_DMA_TERMCNTIRQCLR);
writel(mask, dmac + S6_DMA_PENDCNTIRQCLR);
writel(mask, dmac + S6_DMA_LOWWMRKIRQCLR);
writel(readl(dmac + S6_DMA_INTENABLE0)
& ~((mask << S6_DMA_INT0_UNDER) | (mask << S6_DMA_INT0_OVER)),
dmac + S6_DMA_INTENABLE0);
writel(readl(dmac + S6_DMA_INTENABLE1) & ~(mask << S6_DMA_INT1_CHANNEL),
dmac + S6_DMA_INTENABLE1);
writel((mask << S6_DMA_INT0_UNDER) | (mask << S6_DMA_INT0_OVER),
dmac + S6_DMA_INTCLEAR0);
writel(mask << S6_DMA_INT1_CHANNEL, dmac + S6_DMA_INTCLEAR1);
}
/*
* request channel from specified engine
* with chan<0, accept any channel
* further parameters see s6dmac_enable_chan
* returns < 0 upon error, channel nb otherwise
*/
static inline int s6dmac_request_chan(u32 dmac, int chan,
int prio,
int periphxfer,
int srcinc, int dstinc,
int comchunk,
int srcskip, int dstskip,
int burstsize,
int bandwidthconserve,
int lowwmark,
int timestamp,
int enable)
{
int r = chan;
unsigned long flags;
spinlock_t *spinl = &s6dmac_ctrl[_dmac_addr_index(dmac)].lock;
spin_lock_irqsave(spinl, flags);
if (r < 0) {
r = (readl(dmac + S6_DMA_NEXTFREE) >> S6_DMA_NEXTFREE_CHAN)
& S6_DMA_NEXTFREE_CHAN_MASK;
}
if (r >= s6dmac_ctrl[_dmac_addr_index(dmac)].chan_nb) {
if (chan < 0)
r = -EBUSY;
else
r = -ENXIO;
} else if (((readl(dmac + S6_DMA_NEXTFREE) >> S6_DMA_NEXTFREE_ENA)
>> r) & 1) {
r = -EBUSY;
} else {
s6dmac_enable_chan(dmac, r, prio, periphxfer,
srcinc, dstinc, comchunk, srcskip, dstskip, burstsize,
bandwidthconserve, lowwmark, timestamp, enable);
}
spin_unlock_irqrestore(spinl, flags);
return r;
}
static inline void s6dmac_put_fifo(u32 dmac, int chan,
u32 src, u32 dst, u32 size)
{
unsigned long flags;
spinlock_t *spinl = &s6dmac_ctrl[_dmac_addr_index(dmac)].lock;
spin_lock_irqsave(spinl, flags);
writel(src, dmac + S6_DMA_DESCRFIFO0);
writel(dst, dmac + S6_DMA_DESCRFIFO1);
writel(size, dmac + S6_DMA_DESCRFIFO2);
writel(chan, dmac + S6_DMA_DESCRFIFO3);
spin_unlock_irqrestore(spinl, flags);
}
static inline u32 s6dmac_channel_enabled(u32 dmac, int chan)
{
return readl(DMA_CHNL(dmac, chan) + S6_DMA_CHNCTRL) &
(1 << S6_DMA_CHNCTRL_ENABLE);
}
/*
* group 1-4 data port channels
* with port=0..3, nrch=1-4 channels,
* frrep=0/1 (dis- or enable frame repeat)
*/
static inline void s6dmac_dp_setup_group(u32 dmac, int port,
int nrch, int frrep)
{
static const u8 mask[4] = {0, 3, 1, 2};
BUG_ON(dmac != S6_REG_DPDMA);
if ((port < 0) || (port > 3) || (nrch < 1) || (nrch > 4))
return;
writel((mask[nrch - 1] << S6_DMA_DPORTCTRLGRP_NRCHANS)
| ((frrep ? 1 : 0) << S6_DMA_DPORTCTRLGRP_FRAMEREP),
dmac + S6_DMA_DPORTCTRLGRP(port));
}
static inline void s6dmac_dp_switch_group(u32 dmac, int port, int enable)
{
u32 tmp;
BUG_ON(dmac != S6_REG_DPDMA);
tmp = readl(dmac + S6_DMA_DPORTCTRLGRP(port));
if (enable)
tmp |= (1 << S6_DMA_DPORTCTRLGRP_ENA);
else
tmp &= ~(1 << S6_DMA_DPORTCTRLGRP_ENA);
writel(tmp, dmac + S6_DMA_DPORTCTRLGRP(port));
}
extern void s6dmac_put_fifo_cache(u32 dmac, int chan,
u32 src, u32 dst, u32 size);
extern void s6dmac_disable_error_irqs(u32 dmac, u32 mask);
extern u32 s6dmac_int_sources(u32 dmac, u32 channel);
extern void s6dmac_release_chan(u32 dmac, int chan);
#endif /* __ASM_XTENSA_S6000_DMAC_H */
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