Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2009-2011 Florian Fainelli <florian@openwrt.org>
7 * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com>
8 */
9
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/export.h>
13#include <linux/platform_device.h>
14#include <linux/err.h>
15#include <linux/clk.h>
16
17#include <bcm63xx_cpu.h>
18#include <bcm63xx_dev_spi.h>
19#include <bcm63xx_regs.h>
20
21#ifdef BCMCPU_RUNTIME_DETECT
22/*
23 * register offsets
24 */
25static const unsigned long bcm6338_regs_spi[] = {
26 __GEN_SPI_REGS_TABLE(6338)
27};
28
29static const unsigned long bcm6348_regs_spi[] = {
30 __GEN_SPI_REGS_TABLE(6348)
31};
32
33static const unsigned long bcm6358_regs_spi[] = {
34 __GEN_SPI_REGS_TABLE(6358)
35};
36
37static const unsigned long bcm6368_regs_spi[] = {
38 __GEN_SPI_REGS_TABLE(6368)
39};
40
41const unsigned long *bcm63xx_regs_spi;
42EXPORT_SYMBOL(bcm63xx_regs_spi);
43
44static __init void bcm63xx_spi_regs_init(void)
45{
46 if (BCMCPU_IS_6338())
47 bcm63xx_regs_spi = bcm6338_regs_spi;
48 if (BCMCPU_IS_6348())
49 bcm63xx_regs_spi = bcm6348_regs_spi;
50 if (BCMCPU_IS_6358())
51 bcm63xx_regs_spi = bcm6358_regs_spi;
52 if (BCMCPU_IS_6368())
53 bcm63xx_regs_spi = bcm6368_regs_spi;
54}
55#else
56static __init void bcm63xx_spi_regs_init(void) { }
57#endif
58
59static struct resource spi_resources[] = {
60 {
61 .start = -1, /* filled at runtime */
62 .end = -1, /* filled at runtime */
63 .flags = IORESOURCE_MEM,
64 },
65 {
66 .start = -1, /* filled at runtime */
67 .flags = IORESOURCE_IRQ,
68 },
69};
70
71static struct bcm63xx_spi_pdata spi_pdata = {
72 .bus_num = 0,
73 .num_chipselect = 8,
74};
75
76static struct platform_device bcm63xx_spi_device = {
77 .name = "bcm63xx-spi",
78 .id = -1,
79 .num_resources = ARRAY_SIZE(spi_resources),
80 .resource = spi_resources,
81 .dev = {
82 .platform_data = &spi_pdata,
83 },
84};
85
86int __init bcm63xx_spi_register(void)
87{
88 struct clk *periph_clk;
89
90 if (BCMCPU_IS_6328() || BCMCPU_IS_6345())
91 return -ENODEV;
92
93 periph_clk = clk_get(NULL, "periph");
94 if (IS_ERR(periph_clk)) {
95 pr_err("unable to get periph clock\n");
96 return -ENODEV;
97 }
98
99 /* Set bus frequency */
100 spi_pdata.speed_hz = clk_get_rate(periph_clk);
101
102 spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
103 spi_resources[0].end = spi_resources[0].start;
104 spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
105
106 if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
107 spi_resources[0].end += BCM_6338_RSET_SPI_SIZE - 1;
108 spi_pdata.fifo_size = SPI_6338_MSG_DATA_SIZE;
109 spi_pdata.msg_type_shift = SPI_6338_MSG_TYPE_SHIFT;
110 spi_pdata.msg_ctl_width = SPI_6338_MSG_CTL_WIDTH;
111 }
112
113 if (BCMCPU_IS_6358() || BCMCPU_IS_6368()) {
114 spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
115 spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE;
116 spi_pdata.msg_type_shift = SPI_6358_MSG_TYPE_SHIFT;
117 spi_pdata.msg_ctl_width = SPI_6358_MSG_CTL_WIDTH;
118 }
119
120 bcm63xx_spi_regs_init();
121
122 return platform_device_register(&bcm63xx_spi_device);
123}