aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-s5p6442/dev-spi.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-s5p6442/dev-spi.c')
-rw-r--r--arch/arm/mach-s5p6442/dev-spi.c121
1 files changed, 0 insertions, 121 deletions
diff --git a/arch/arm/mach-s5p6442/dev-spi.c b/arch/arm/mach-s5p6442/dev-spi.c
deleted file mode 100644
index cce8c2470709..000000000000
--- a/arch/arm/mach-s5p6442/dev-spi.c
+++ /dev/null
@@ -1,121 +0,0 @@
1/* linux/arch/arm/mach-s5p6442/dev-spi.c
2 *
3 * Copyright (C) 2010 Samsung Electronics Co. Ltd.
4 * Jaswinder Singh <jassi.brar@samsung.com>
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/platform_device.h>
12#include <linux/dma-mapping.h>
13#include <linux/gpio.h>
14
15#include <mach/dma.h>
16#include <mach/map.h>
17#include <mach/irqs.h>
18#include <mach/spi-clocks.h>
19
20#include <plat/s3c64xx-spi.h>
21#include <plat/gpio-cfg.h>
22
23static char *spi_src_clks[] = {
24 [S5P6442_SPI_SRCCLK_PCLK] = "pclk",
25 [S5P6442_SPI_SRCCLK_SCLK] = "spi_epll",
26};
27
28/* SPI Controller platform_devices */
29
30/* Since we emulate multi-cs capability, we do not touch the CS.
31 * The emulated CS is toggled by board specific mechanism, as it can
32 * be either some immediate GPIO or some signal out of some other
33 * chip in between ... or some yet another way.
34 * We simply do not assume anything about CS.
35 */
36static int s5p6442_spi_cfg_gpio(struct platform_device *pdev)
37{
38 switch (pdev->id) {
39 case 0:
40 s3c_gpio_cfgpin(S5P6442_GPB(0), S3C_GPIO_SFN(2));
41 s3c_gpio_setpull(S5P6442_GPB(0), S3C_GPIO_PULL_UP);
42 s3c_gpio_cfgall_range(S5P6442_GPB(2), 2,
43 S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
44 break;
45
46 default:
47 dev_err(&pdev->dev, "Invalid SPI Controller number!");
48 return -EINVAL;
49 }
50
51 return 0;
52}
53
54static struct resource s5p6442_spi0_resource[] = {
55 [0] = {
56 .start = S5P6442_PA_SPI,
57 .end = S5P6442_PA_SPI + 0x100 - 1,
58 .flags = IORESOURCE_MEM,
59 },
60 [1] = {
61 .start = DMACH_SPI0_TX,
62 .end = DMACH_SPI0_TX,
63 .flags = IORESOURCE_DMA,
64 },
65 [2] = {
66 .start = DMACH_SPI0_RX,
67 .end = DMACH_SPI0_RX,
68 .flags = IORESOURCE_DMA,
69 },
70 [3] = {
71 .start = IRQ_SPI0,
72 .end = IRQ_SPI0,
73 .flags = IORESOURCE_IRQ,
74 },
75};
76
77static struct s3c64xx_spi_info s5p6442_spi0_pdata = {
78 .cfg_gpio = s5p6442_spi_cfg_gpio,
79 .fifo_lvl_mask = 0x1ff,
80 .rx_lvl_offset = 15,
81};
82
83static u64 spi_dmamask = DMA_BIT_MASK(32);
84
85struct platform_device s5p6442_device_spi = {
86 .name = "s3c64xx-spi",
87 .id = 0,
88 .num_resources = ARRAY_SIZE(s5p6442_spi0_resource),
89 .resource = s5p6442_spi0_resource,
90 .dev = {
91 .dma_mask = &spi_dmamask,
92 .coherent_dma_mask = DMA_BIT_MASK(32),
93 .platform_data = &s5p6442_spi0_pdata,
94 },
95};
96
97void __init s5p6442_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
98{
99 struct s3c64xx_spi_info *pd;
100
101 /* Reject invalid configuration */
102 if (!num_cs || src_clk_nr < 0
103 || src_clk_nr > S5P6442_SPI_SRCCLK_SCLK) {
104 printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
105 return;
106 }
107
108 switch (cntrlr) {
109 case 0:
110 pd = &s5p6442_spi0_pdata;
111 break;
112 default:
113 printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
114 __func__, cntrlr);
115 return;
116 }
117
118 pd->num_cs = num_cs;
119 pd->src_clk_nr = src_clk_nr;
120 pd->src_clk_name = spi_src_clks[src_clk_nr];
121}