xref: /openbmc/linux/arch/mips/bcm63xx/dev-spi.c (revision b34e08d5)
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 bcm6348_regs_spi[] = {
26 	__GEN_SPI_REGS_TABLE(6348)
27 };
28 
29 static const unsigned long bcm6358_regs_spi[] = {
30 	__GEN_SPI_REGS_TABLE(6358)
31 };
32 
33 const unsigned long *bcm63xx_regs_spi;
34 EXPORT_SYMBOL(bcm63xx_regs_spi);
35 
36 static __init void bcm63xx_spi_regs_init(void)
37 {
38 	if (BCMCPU_IS_6338() || BCMCPU_IS_6348())
39 		bcm63xx_regs_spi = bcm6348_regs_spi;
40 	if (BCMCPU_IS_3368() || BCMCPU_IS_6358() ||
41 		BCMCPU_IS_6362() || BCMCPU_IS_6368())
42 		bcm63xx_regs_spi = bcm6358_regs_spi;
43 }
44 #else
45 static __init void bcm63xx_spi_regs_init(void) { }
46 #endif
47 
48 static struct resource spi_resources[] = {
49 	{
50 		.start		= -1, /* filled at runtime */
51 		.end		= -1, /* filled at runtime */
52 		.flags		= IORESOURCE_MEM,
53 	},
54 	{
55 		.start		= -1, /* filled at runtime */
56 		.flags		= IORESOURCE_IRQ,
57 	},
58 };
59 
60 static struct bcm63xx_spi_pdata spi_pdata = {
61 	.bus_num		= 0,
62 	.num_chipselect		= 8,
63 };
64 
65 static struct platform_device bcm63xx_spi_device = {
66 	.name		= "bcm63xx-spi",
67 	.id		= -1,
68 	.num_resources	= ARRAY_SIZE(spi_resources),
69 	.resource	= spi_resources,
70 	.dev		= {
71 		.platform_data = &spi_pdata,
72 	},
73 };
74 
75 int __init bcm63xx_spi_register(void)
76 {
77 	if (BCMCPU_IS_6328() || BCMCPU_IS_6345())
78 		return -ENODEV;
79 
80 	spi_resources[0].start = bcm63xx_regset_address(RSET_SPI);
81 	spi_resources[0].end = spi_resources[0].start;
82 	spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI);
83 
84 	if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
85 		spi_resources[0].end += BCM_6348_RSET_SPI_SIZE - 1;
86 		spi_pdata.fifo_size = SPI_6348_MSG_DATA_SIZE;
87 		spi_pdata.msg_type_shift = SPI_6348_MSG_TYPE_SHIFT;
88 		spi_pdata.msg_ctl_width = SPI_6348_MSG_CTL_WIDTH;
89 	}
90 
91 	if (BCMCPU_IS_3368() || BCMCPU_IS_6358() || BCMCPU_IS_6362() ||
92 		BCMCPU_IS_6368()) {
93 		spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1;
94 		spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE;
95 		spi_pdata.msg_type_shift = SPI_6358_MSG_TYPE_SHIFT;
96 		spi_pdata.msg_ctl_width = SPI_6358_MSG_CTL_WIDTH;
97 	}
98 
99 	bcm63xx_spi_regs_init();
100 
101 	return platform_device_register(&bcm63xx_spi_device);
102 }
103