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-rw-r--r--arch/arm/plat-mxc/Makefile4
-rw-r--r--arch/arm/plat-mxc/ssi-fiq-ksym.c20
-rw-r--r--arch/arm/plat-mxc/ssi-fiq.S134
-rw-r--r--arch/sh/include/asm/siu.h26
4 files changed, 184 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile
index 996cbac6932c..6cee38df58b2 100644
--- a/arch/arm/plat-mxc/Makefile
+++ b/arch/arm/plat-mxc/Makefile
@@ -13,3 +13,7 @@ obj-$(CONFIG_USB_EHCI_MXC) += ehci.o
13obj-$(CONFIG_MXC_ULPI) += ulpi.o 13obj-$(CONFIG_MXC_ULPI) += ulpi.o
14obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o 14obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o
15obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o 15obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o
16ifdef CONFIG_SND_IMX_SOC
17obj-y += ssi-fiq.o
18obj-y += ssi-fiq-ksym.o
19endif
diff --git a/arch/arm/plat-mxc/ssi-fiq-ksym.c b/arch/arm/plat-mxc/ssi-fiq-ksym.c
new file mode 100644
index 000000000000..b5fad454da78
--- /dev/null
+++ b/arch/arm/plat-mxc/ssi-fiq-ksym.c
@@ -0,0 +1,20 @@
1/*
2 * Exported ksyms for the SSI FIQ handler
3 *
4 * Copyright (C) 2009, Sascha Hauer <s.hauer@pengutronix.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/module.h>
12
13#include <mach/ssi.h>
14
15EXPORT_SYMBOL(imx_ssi_fiq_tx_buffer);
16EXPORT_SYMBOL(imx_ssi_fiq_rx_buffer);
17EXPORT_SYMBOL(imx_ssi_fiq_start);
18EXPORT_SYMBOL(imx_ssi_fiq_end);
19EXPORT_SYMBOL(imx_ssi_fiq_base);
20
diff --git a/arch/arm/plat-mxc/ssi-fiq.S b/arch/arm/plat-mxc/ssi-fiq.S
new file mode 100644
index 000000000000..4ddce565b353
--- /dev/null
+++ b/arch/arm/plat-mxc/ssi-fiq.S
@@ -0,0 +1,134 @@
1/*
2 * Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/linkage.h>
10#include <asm/assembler.h>
11
12/*
13 * r8 = bit 0-15: tx offset, bit 16-31: tx buffer size
14 * r9 = bit 0-15: rx offset, bit 16-31: rx buffer size
15 */
16
17#define SSI_STX0 0x00
18#define SSI_SRX0 0x08
19#define SSI_SISR 0x14
20#define SSI_SIER 0x18
21#define SSI_SACNT 0x38
22
23#define SSI_SACNT_AC97EN (1 << 0)
24
25#define SSI_SIER_TFE0_EN (1 << 0)
26#define SSI_SISR_TFE0 (1 << 0)
27#define SSI_SISR_RFF0 (1 << 2)
28#define SSI_SIER_RFF0_EN (1 << 2)
29
30 .text
31 .global imx_ssi_fiq_start
32 .global imx_ssi_fiq_end
33 .global imx_ssi_fiq_base
34 .global imx_ssi_fiq_rx_buffer
35 .global imx_ssi_fiq_tx_buffer
36
37imx_ssi_fiq_start:
38 ldr r12, imx_ssi_fiq_base
39
40 /* TX */
41 ldr r11, imx_ssi_fiq_tx_buffer
42
43 /* shall we send? */
44 ldr r13, [r12, #SSI_SIER]
45 tst r13, #SSI_SIER_TFE0_EN
46 beq 1f
47
48 /* TX FIFO empty? */
49 ldr r13, [r12, #SSI_SISR]
50 tst r13, #SSI_SISR_TFE0
51 beq 1f
52
53 mov r10, #0x10000
54 sub r10, #1
55 and r10, r10, r8 /* r10: current buffer offset */
56
57 add r11, r11, r10
58
59 ldrh r13, [r11]
60 strh r13, [r12, #SSI_STX0]
61
62 ldrh r13, [r11, #2]
63 strh r13, [r12, #SSI_STX0]
64
65 ldrh r13, [r11, #4]
66 strh r13, [r12, #SSI_STX0]
67
68 ldrh r13, [r11, #6]
69 strh r13, [r12, #SSI_STX0]
70
71 add r10, #8
72 lsr r13, r8, #16 /* r13: buffer size */
73 cmp r10, r13
74 lslgt r8, r13, #16
75 addle r8, #8
761:
77 /* RX */
78
79 /* shall we receive? */
80 ldr r13, [r12, #SSI_SIER]
81 tst r13, #SSI_SIER_RFF0_EN
82 beq 1f
83
84 /* RX FIFO full? */
85 ldr r13, [r12, #SSI_SISR]
86 tst r13, #SSI_SISR_RFF0
87 beq 1f
88
89 ldr r11, imx_ssi_fiq_rx_buffer
90
91 mov r10, #0x10000
92 sub r10, #1
93 and r10, r10, r9 /* r10: current buffer offset */
94
95 add r11, r11, r10
96
97 ldr r13, [r12, #SSI_SACNT]
98 tst r13, #SSI_SACNT_AC97EN
99
100 ldr r13, [r12, #SSI_SRX0]
101 strh r13, [r11]
102
103 ldr r13, [r12, #SSI_SRX0]
104 strh r13, [r11, #2]
105
106 /* dummy read to skip slot 12 */
107 ldrne r13, [r12, #SSI_SRX0]
108
109 ldr r13, [r12, #SSI_SRX0]
110 strh r13, [r11, #4]
111
112 ldr r13, [r12, #SSI_SRX0]
113 strh r13, [r11, #6]
114
115 /* dummy read to skip slot 12 */
116 ldrne r13, [r12, #SSI_SRX0]
117
118 add r10, #8
119 lsr r13, r9, #16 /* r13: buffer size */
120 cmp r10, r13
121 lslgt r9, r13, #16
122 addle r9, #8
123
1241:
125 @ return from FIQ
126 subs pc, lr, #4
127imx_ssi_fiq_base:
128 .word 0x0
129imx_ssi_fiq_rx_buffer:
130 .word 0x0
131imx_ssi_fiq_tx_buffer:
132 .word 0x0
133imx_ssi_fiq_end:
134
diff --git a/arch/sh/include/asm/siu.h b/arch/sh/include/asm/siu.h
new file mode 100644
index 000000000000..57565a3b551f
--- /dev/null
+++ b/arch/sh/include/asm/siu.h
@@ -0,0 +1,26 @@
1/*
2 * platform header for the SIU ASoC driver
3 *
4 * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef ASM_SIU_H
12#define ASM_SIU_H
13
14#include <asm/dma-sh.h>
15
16struct device;
17
18struct siu_platform {
19 struct device *dma_dev;
20 enum sh_dmae_slave_chan_id dma_slave_tx_a;
21 enum sh_dmae_slave_chan_id dma_slave_rx_a;
22 enum sh_dmae_slave_chan_id dma_slave_tx_b;
23 enum sh_dmae_slave_chan_id dma_slave_rx_b;
24};
25
26#endif /* ASM_SIU_H */
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