1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/* linux/arch/arm/mach-s5pv210/dev-spi.c
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/gpio.h>
#include <mach/dma.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <mach/spi-clocks.h>
#include <plat/s3c64xx-spi.h>
#include <plat/gpio-cfg.h>
/* SPI Controller platform_devices */
/* Since we emulate multi-cs capability, we do not touch the CS.
* The emulated CS is toggled by board specific mechanism, as it can
* be either some immediate GPIO or some signal out of some other
* chip in between ... or some yet another way.
* We simply do not assume anything about CS.
*/
static int s5pv210_spi_cfg_gpio(struct platform_device *pdev)
{
unsigned int base;
switch (pdev->id) {
case 0:
base = S5PV210_GPB(0);
break;
case 1:
base = S5PV210_GPB(4);
break;
default:
dev_err(&pdev->dev, "Invalid SPI Controller number!");
return -EINVAL;
}
s3c_gpio_cfgall_range(base, 3,
S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
return 0;
}
static struct resource s5pv210_spi0_resource[] = {
[0] = {
.start = S5PV210_PA_SPI0,
.end = S5PV210_PA_SPI0 + 0x100 - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = DMACH_SPI0_TX,
.end = DMACH_SPI0_TX,
.flags = IORESOURCE_DMA,
},
[2] = {
.start = DMACH_SPI0_RX,
.end = DMACH_SPI0_RX,
.flags = IORESOURCE_DMA,
},
[3] = {
.start = IRQ_SPI0,
.end = IRQ_SPI0,
.flags = IORESOURCE_IRQ,
},
};
static struct s3c64xx_spi_info s5pv210_spi0_pdata = {
.cfg_gpio = s5pv210_spi_cfg_gpio,
.fifo_lvl_mask = 0x1ff,
.rx_lvl_offset = 15,
.high_speed = 1,
.tx_st_done = 25,
};
static u64 spi_dmamask = DMA_BIT_MASK(32);
struct platform_device s5pv210_device_spi0 = {
.name = "s3c64xx-spi",
.id = 0,
.num_resources = ARRAY_SIZE(s5pv210_spi0_resource),
.resource = s5pv210_spi0_resource,
.dev = {
.dma_mask = &spi_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pv210_spi0_pdata,
},
};
static struct resource s5pv210_spi1_resource[] = {
[0] = {
.start = S5PV210_PA_SPI1,
.end = S5PV210_PA_SPI1 + 0x100 - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = DMACH_SPI1_TX,
.end = DMACH_SPI1_TX,
.flags = IORESOURCE_DMA,
},
[2] = {
.start = DMACH_SPI1_RX,
.end = DMACH_SPI1_RX,
.flags = IORESOURCE_DMA,
},
[3] = {
.start = IRQ_SPI1,
.end = IRQ_SPI1,
.flags = IORESOURCE_IRQ,
},
};
static struct s3c64xx_spi_info s5pv210_spi1_pdata = {
.cfg_gpio = s5pv210_spi_cfg_gpio,
.fifo_lvl_mask = 0x7f,
.rx_lvl_offset = 15,
.high_speed = 1,
.tx_st_done = 25,
};
struct platform_device s5pv210_device_spi1 = {
.name = "s3c64xx-spi",
.id = 1,
.num_resources = ARRAY_SIZE(s5pv210_spi1_resource),
.resource = s5pv210_spi1_resource,
.dev = {
.dma_mask = &spi_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pv210_spi1_pdata,
},
};
void __init s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
{
struct s3c64xx_spi_info *pd;
/* Reject invalid configuration */
if (!num_cs || src_clk_nr < 0
|| src_clk_nr > S5PV210_SPI_SRCCLK_SCLK) {
printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
return;
}
switch (cntrlr) {
case 0:
pd = &s5pv210_spi0_pdata;
break;
case 1:
pd = &s5pv210_spi1_pdata;
break;
default:
printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
__func__, cntrlr);
return;
}
pd->num_cs = num_cs;
pd->src_clk_nr = src_clk_nr;
}
|
