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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 | */ | |
25 | static const unsigned long bcm6338_regs_spi[] = { | |
26 | __GEN_SPI_REGS_TABLE(6338) | |
27 | }; | |
28 | ||
29 | static const unsigned long bcm6348_regs_spi[] = { | |
30 | __GEN_SPI_REGS_TABLE(6348) | |
31 | }; | |
32 | ||
33 | static const unsigned long bcm6358_regs_spi[] = { | |
34 | __GEN_SPI_REGS_TABLE(6358) | |
35 | }; | |
36 | ||
37 | static const unsigned long bcm6368_regs_spi[] = { | |
38 | __GEN_SPI_REGS_TABLE(6368) | |
39 | }; | |
40 | ||
41 | const unsigned long *bcm63xx_regs_spi; | |
42 | EXPORT_SYMBOL(bcm63xx_regs_spi); | |
43 | ||
44 | static __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 | |
56 | static __init void bcm63xx_spi_regs_init(void) { } | |
57 | #endif | |
58 | ||
59 | static 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 | ||
71 | static struct bcm63xx_spi_pdata spi_pdata = { | |
72 | .bus_num = 0, | |
73 | .num_chipselect = 8, | |
74 | }; | |
75 | ||
76 | static 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 | ||
86 | int __init bcm63xx_spi_register(void) | |
87 | { | |
88 | struct clk *periph_clk; | |
89 | ||
e5766aea | 90 | if (BCMCPU_IS_6328() || BCMCPU_IS_6345()) |
39ca476e FF |
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; | |
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109 | spi_pdata.msg_type_shift = SPI_6338_MSG_TYPE_SHIFT; |
110 | spi_pdata.msg_ctl_width = SPI_6338_MSG_CTL_WIDTH; | |
39ca476e FF |
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; | |
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116 | spi_pdata.msg_type_shift = SPI_6358_MSG_TYPE_SHIFT; |
117 | spi_pdata.msg_ctl_width = SPI_6358_MSG_CTL_WIDTH; | |
39ca476e FF |
118 | } |
119 | ||
120 | bcm63xx_spi_regs_init(); | |
121 | ||
122 | return platform_device_register(&bcm63xx_spi_device); | |
123 | } |