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) 2008 Maxime Bizon <mbizon@freebox.fr>
7  */
8 
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <asm/bootinfo.h>
12 #include <linux/platform_device.h>
13 #include <bcm63xx_cs.h>
14 #include <bcm63xx_cpu.h>
15 #include <bcm63xx_dev_pcmcia.h>
16 #include <bcm63xx_io.h>
17 #include <bcm63xx_regs.h>
18 
19 static struct resource pcmcia_resources[] = {
20 	/* pcmcia registers */
21 	{
22 		/* start & end filled at runtime */
23 		.flags		= IORESOURCE_MEM,
24 	},
25 
26 	/* pcmcia memory zone resources */
27 	{
28 		.start		= BCM_PCMCIA_COMMON_BASE_PA,
29 		.end		= BCM_PCMCIA_COMMON_END_PA,
30 		.flags		= IORESOURCE_MEM,
31 	},
32 	{
33 		.start		= BCM_PCMCIA_ATTR_BASE_PA,
34 		.end		= BCM_PCMCIA_ATTR_END_PA,
35 		.flags		= IORESOURCE_MEM,
36 	},
37 	{
38 		.start		= BCM_PCMCIA_IO_BASE_PA,
39 		.end		= BCM_PCMCIA_IO_END_PA,
40 		.flags		= IORESOURCE_MEM,
41 	},
42 
43 	/* PCMCIA irq */
44 	{
45 		/* start filled at runtime */
46 		.flags		= IORESOURCE_IRQ,
47 	},
48 
49 	/* declare PCMCIA IO resource also */
50 	{
51 		.start		= BCM_PCMCIA_IO_BASE_PA,
52 		.end		= BCM_PCMCIA_IO_END_PA,
53 		.flags		= IORESOURCE_IO,
54 	},
55 };
56 
57 static struct bcm63xx_pcmcia_platform_data pd;
58 
59 static struct platform_device bcm63xx_pcmcia_device = {
60 	.name		= "bcm63xx_pcmcia",
61 	.id		= 0,
62 	.num_resources	= ARRAY_SIZE(pcmcia_resources),
63 	.resource	= pcmcia_resources,
64 	.dev		= {
65 		.platform_data = &pd,
66 	},
67 };
68 
config_pcmcia_cs(unsigned int cs,u32 base,unsigned int size)69 static int __init config_pcmcia_cs(unsigned int cs,
70 				   u32 base, unsigned int size)
71 {
72 	int ret;
73 
74 	ret = bcm63xx_set_cs_status(cs, 0);
75 	if (!ret)
76 		ret = bcm63xx_set_cs_base(cs, base, size);
77 	if (!ret)
78 		ret = bcm63xx_set_cs_status(cs, 1);
79 	return ret;
80 }
81 
82 static const struct {
83 	unsigned int	cs;
84 	unsigned int	base;
85 	unsigned int	size;
86 } pcmcia_cs[3] __initconst = {
87 	{
88 		.cs	= MPI_CS_PCMCIA_COMMON,
89 		.base	= BCM_PCMCIA_COMMON_BASE_PA,
90 		.size	= BCM_PCMCIA_COMMON_SIZE
91 	},
92 	{
93 		.cs	= MPI_CS_PCMCIA_ATTR,
94 		.base	= BCM_PCMCIA_ATTR_BASE_PA,
95 		.size	= BCM_PCMCIA_ATTR_SIZE
96 	},
97 	{
98 		.cs	= MPI_CS_PCMCIA_IO,
99 		.base	= BCM_PCMCIA_IO_BASE_PA,
100 		.size	= BCM_PCMCIA_IO_SIZE
101 	},
102 };
103 
bcm63xx_pcmcia_register(void)104 int __init bcm63xx_pcmcia_register(void)
105 {
106 	int ret, i;
107 
108 	if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358())
109 		return 0;
110 
111 	/* use correct pcmcia ready gpio depending on processor */
112 	switch (bcm63xx_get_cpu_id()) {
113 	case BCM6348_CPU_ID:
114 		pd.ready_gpio = 22;
115 		break;
116 
117 	case BCM6358_CPU_ID:
118 		pd.ready_gpio = 18;
119 		break;
120 
121 	default:
122 		return -ENODEV;
123 	}
124 
125 	pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
126 	pcmcia_resources[0].end = pcmcia_resources[0].start +
127 		RSET_PCMCIA_SIZE - 1;
128 	pcmcia_resources[4].start = bcm63xx_get_irq_number(IRQ_PCMCIA);
129 
130 	/* configure pcmcia chip selects */
131 	for (i = 0; i < 3; i++) {
132 		ret = config_pcmcia_cs(pcmcia_cs[i].cs,
133 				       pcmcia_cs[i].base,
134 				       pcmcia_cs[i].size);
135 		if (ret)
136 			goto out_err;
137 	}
138 
139 	return platform_device_register(&bcm63xx_pcmcia_device);
140 
141 out_err:
142 	pr_err("unable to set pcmcia chip select\n");
143 	return ret;
144 }
145