tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright (C) 2007-2010 Freescale Semiconductor, Inc. All rights reserved.
3 *
4 * Author:
5 * Zhang Wei <wei.zhang@freescale.com>, Jul 2007
6 * Ebony Zhu <ebony.zhu@freescale.com>, May 2007
7 *
8 * This 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.
12 *
13 */
14#ifndef __DMA_FSLDMA_H
15#define __DMA_FSLDMA_H
16
17#include <linux/device.h>
18#include <linux/dmapool.h>
19#include <linux/dmaengine.h>
20
21/* Define data structures needed by Freescale
22 * MPC8540 and MPC8349 DMA controller.
23 */
24#define FSL_DMA_MR_CS 0x00000001
25#define FSL_DMA_MR_CC 0x00000002
26#define FSL_DMA_MR_CA 0x00000008
27#define FSL_DMA_MR_EIE 0x00000040
28#define FSL_DMA_MR_XFE 0x00000020
29#define FSL_DMA_MR_EOLNIE 0x00000100
30#define FSL_DMA_MR_EOLSIE 0x00000080
31#define FSL_DMA_MR_EOSIE 0x00000200
32#define FSL_DMA_MR_CDSM 0x00000010
33#define FSL_DMA_MR_CTM 0x00000004
34#define FSL_DMA_MR_EMP_EN 0x00200000
35#define FSL_DMA_MR_EMS_EN 0x00040000
36#define FSL_DMA_MR_DAHE 0x00002000
37#define FSL_DMA_MR_SAHE 0x00001000
38
39#define FSL_DMA_MR_SAHTS_MASK 0x0000C000
40#define FSL_DMA_MR_DAHTS_MASK 0x00030000
41#define FSL_DMA_MR_BWC_MASK 0x0f000000
42
43/*
44 * Bandwidth/pause control determines how many bytes a given
45 * channel is allowed to transfer before the DMA engine pauses
46 * the current channel and switches to the next channel
47 */
48#define FSL_DMA_MR_BWC 0x0A000000
49
50/* Special MR definition for MPC8349 */
51#define FSL_DMA_MR_EOTIE 0x00000080
52#define FSL_DMA_MR_PRC_RM 0x00000800
53
54#define FSL_DMA_SR_CH 0x00000020
55#define FSL_DMA_SR_PE 0x00000010
56#define FSL_DMA_SR_CB 0x00000004
57#define FSL_DMA_SR_TE 0x00000080
58#define FSL_DMA_SR_EOSI 0x00000002
59#define FSL_DMA_SR_EOLSI 0x00000001
60#define FSL_DMA_SR_EOCDI 0x00000001
61#define FSL_DMA_SR_EOLNI 0x00000008
62
63#define FSL_DMA_SATR_SBPATMU 0x20000000
64#define FSL_DMA_SATR_STRANSINT_RIO 0x00c00000
65#define FSL_DMA_SATR_SREADTYPE_SNOOP_READ 0x00050000
66#define FSL_DMA_SATR_SREADTYPE_BP_IORH 0x00020000
67#define FSL_DMA_SATR_SREADTYPE_BP_NREAD 0x00040000
68#define FSL_DMA_SATR_SREADTYPE_BP_MREAD 0x00070000
69
70#define FSL_DMA_DATR_DBPATMU 0x20000000
71#define FSL_DMA_DATR_DTRANSINT_RIO 0x00c00000
72#define FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE 0x00050000
73#define FSL_DMA_DATR_DWRITETYPE_BP_FLUSH 0x00010000
74
75#define FSL_DMA_EOL ((u64)0x1)
76#define FSL_DMA_SNEN ((u64)0x10)
77#define FSL_DMA_EOSIE 0x8
78#define FSL_DMA_NLDA_MASK (~(u64)0x1f)
79
80#define FSL_DMA_BCR_MAX_CNT 0x03ffffffu
81
82#define FSL_DMA_DGSR_TE 0x80
83#define FSL_DMA_DGSR_CH 0x20
84#define FSL_DMA_DGSR_PE 0x10
85#define FSL_DMA_DGSR_EOLNI 0x08
86#define FSL_DMA_DGSR_CB 0x04
87#define FSL_DMA_DGSR_EOSI 0x02
88#define FSL_DMA_DGSR_EOLSI 0x01
89
90#define FSL_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
91 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
92 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
93 BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
94typedef u64 __bitwise v64;
95typedef u32 __bitwise v32;
96
97struct fsl_dma_ld_hw {
98 v64 src_addr;
99 v64 dst_addr;
100 v64 next_ln_addr;
101 v32 count;
102 v32 reserve;
103} __attribute__((aligned(32)));
104
105struct fsl_desc_sw {
106 struct fsl_dma_ld_hw hw;
107 struct list_head node;
108 struct list_head tx_list;
109 struct dma_async_tx_descriptor async_tx;
110} __attribute__((aligned(32)));
111
112struct fsldma_chan_regs {
113 u32 mr; /* 0x00 - Mode Register */
114 u32 sr; /* 0x04 - Status Register */
115 u64 cdar; /* 0x08 - Current descriptor address register */
116 u64 sar; /* 0x10 - Source Address Register */
117 u64 dar; /* 0x18 - Destination Address Register */
118 u32 bcr; /* 0x20 - Byte Count Register */
119 u64 ndar; /* 0x24 - Next Descriptor Address Register */
120};
121
122struct fsldma_chan;
123#define FSL_DMA_MAX_CHANS_PER_DEVICE 8
124
125struct fsldma_device {
126 void __iomem *regs; /* DGSR register base */
127 struct device *dev;
128 struct dma_device common;
129 struct fsldma_chan *chan[FSL_DMA_MAX_CHANS_PER_DEVICE];
130 u32 feature; /* The same as DMA channels */
131 int irq; /* Channel IRQ */
132};
133
134/* Define macros for fsldma_chan->feature property */
135#define FSL_DMA_LITTLE_ENDIAN 0x00000000
136#define FSL_DMA_BIG_ENDIAN 0x00000001
137
138#define FSL_DMA_IP_MASK 0x00000ff0
139#define FSL_DMA_IP_85XX 0x00000010
140#define FSL_DMA_IP_83XX 0x00000020
141
142#define FSL_DMA_CHAN_PAUSE_EXT 0x00001000
143#define FSL_DMA_CHAN_START_EXT 0x00002000
144
145#ifdef CONFIG_PM
146struct fsldma_chan_regs_save {
147 u32 mr;
148};
149
150enum fsldma_pm_state {
151 RUNNING = 0,
152 SUSPENDED,
153};
154#endif
155
156struct fsldma_chan {
157 char name[8]; /* Channel name */
158 struct fsldma_chan_regs __iomem *regs;
159 spinlock_t desc_lock; /* Descriptor operation lock */
160 /*
161 * Descriptors which are queued to run, but have not yet been
162 * submitted to the hardware for execution
163 */
164 struct list_head ld_pending;
165 /*
166 * Descriptors which are currently being executed by the hardware
167 */
168 struct list_head ld_running;
169 /*
170 * Descriptors which have finished execution by the hardware. These
171 * descriptors have already had their cleanup actions run. They are
172 * waiting for the ACK bit to be set by the async_tx API.
173 */
174 struct list_head ld_completed; /* Link descriptors queue */
175 struct dma_chan common; /* DMA common channel */
176 struct dma_pool *desc_pool; /* Descriptors pool */
177 struct device *dev; /* Channel device */
178 int irq; /* Channel IRQ */
179 int id; /* Raw id of this channel */
180 struct tasklet_struct tasklet;
181 u32 feature;
182 bool idle; /* DMA controller is idle */
183#ifdef CONFIG_PM
184 struct fsldma_chan_regs_save regs_save;
185 enum fsldma_pm_state pm_state;
186#endif
187
188 void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
189 void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);
190 void (*set_src_loop_size)(struct fsldma_chan *fsl_chan, int size);
191 void (*set_dst_loop_size)(struct fsldma_chan *fsl_chan, int size);
192 void (*set_request_count)(struct fsldma_chan *fsl_chan, int size);
193};
194
195#define to_fsl_chan(chan) container_of(chan, struct fsldma_chan, common)
196#define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node)
197#define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx)
198
199#ifdef CONFIG_PPC
200#define fsl_ioread32(p) in_le32(p)
201#define fsl_ioread32be(p) in_be32(p)
202#define fsl_iowrite32(v, p) out_le32(p, v)
203#define fsl_iowrite32be(v, p) out_be32(p, v)
204
205#ifdef __powerpc64__
206#define fsl_ioread64(p) in_le64(p)
207#define fsl_ioread64be(p) in_be64(p)
208#define fsl_iowrite64(v, p) out_le64(p, v)
209#define fsl_iowrite64be(v, p) out_be64(p, v)
210#else
211static u64 fsl_ioread64(const u64 __iomem *addr)
212{
213 u32 fsl_addr = lower_32_bits(addr);
214 u64 fsl_addr_hi = (u64)in_le32((u32 *)(fsl_addr + 1)) << 32;
215
216 return fsl_addr_hi | in_le32((u32 *)fsl_addr);
217}
218
219static void fsl_iowrite64(u64 val, u64 __iomem *addr)
220{
221 out_le32((u32 __iomem *)addr + 1, val >> 32);
222 out_le32((u32 __iomem *)addr, (u32)val);
223}
224
225static u64 fsl_ioread64be(const u64 __iomem *addr)
226{
227 u32 fsl_addr = lower_32_bits(addr);
228 u64 fsl_addr_hi = (u64)in_be32((u32 *)fsl_addr) << 32;
229
230 return fsl_addr_hi | in_be32((u32 *)(fsl_addr + 1));
231}
232
233static void fsl_iowrite64be(u64 val, u64 __iomem *addr)
234{
235 out_be32((u32 __iomem *)addr, val >> 32);
236 out_be32((u32 __iomem *)addr + 1, (u32)val);
237}
238#endif
239#endif
240
241#if defined(CONFIG_ARM64) || defined(CONFIG_ARM)
242#define fsl_ioread32(p) ioread32(p)
243#define fsl_ioread32be(p) ioread32be(p)
244#define fsl_iowrite32(v, p) iowrite32(v, p)
245#define fsl_iowrite32be(v, p) iowrite32be(v, p)
246#define fsl_ioread64(p) ioread64(p)
247#define fsl_ioread64be(p) ioread64be(p)
248#define fsl_iowrite64(v, p) iowrite64(v, p)
249#define fsl_iowrite64be(v, p) iowrite64be(v, p)
250#endif
251
252#define FSL_DMA_IN(fsl_dma, addr, width) \
253 (((fsl_dma)->feature & FSL_DMA_BIG_ENDIAN) ? \
254 fsl_ioread##width##be(addr) : fsl_ioread##width(addr))
255
256#define FSL_DMA_OUT(fsl_dma, addr, val, width) \
257 (((fsl_dma)->feature & FSL_DMA_BIG_ENDIAN) ? \
258 fsl_iowrite##width##be(val, addr) : fsl_iowrite \
259 ##width(val, addr))
260
261#define DMA_TO_CPU(fsl_chan, d, width) \
262 (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
263 be##width##_to_cpu((__force __be##width)(v##width)d) : \
264 le##width##_to_cpu((__force __le##width)(v##width)d))
265#define CPU_TO_DMA(fsl_chan, c, width) \
266 (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
267 (__force v##width)cpu_to_be##width(c) : \
268 (__force v##width)cpu_to_le##width(c))
269
270#endif /* __DMA_FSLDMA_H */