1 /*
2 * drivers/pcmcia/sa1100_simpad.c
3 *
4 * PCMCIA implementation routines for simpad
5 *
6 */
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/device.h>
10 #include <linux/init.h>
11
12 #include <mach/hardware.h>
13 #include <asm/mach-types.h>
14 #include <asm/irq.h>
15 #include <mach/simpad.h>
16 #include "sa1100_generic.h"
17
18 extern long get_cs3_shadow(void);
19 extern void set_cs3_bit(int value);
20 extern void clear_cs3_bit(int value);
21
22 static struct pcmcia_irqs irqs[] = {
23 { 1, IRQ_GPIO_CF_CD, "CF_CD" },
24 };
25
26 static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
27 {
28
29 clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
30
31 skt->irq = IRQ_GPIO_CF_IRQ;
32
33 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
34 }
35
36 static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
37 {
38 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
39
40 /* Disable CF bus: */
41 //set_cs3_bit(PCMCIA_BUFF_DIS);
42 clear_cs3_bit(PCMCIA_RESET);
43 }
44
45 static void
46 simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
47 struct pcmcia_state *state)
48 {
49 unsigned long levels = GPLR;
50 long cs3reg = get_cs3_shadow();
51
52 state->detect=((levels & GPIO_CF_CD)==0)?1:0;
53 state->ready=(levels & GPIO_CF_IRQ)?1:0;
54 state->bvd1=1; /* Not available on Simpad. */
55 state->bvd2=1; /* Not available on Simpad. */
56 state->wrprot=0; /* Not available on Simpad. */
57
58 if((cs3reg & 0x0c) == 0x0c) {
59 state->vs_3v=0;
60 state->vs_Xv=0;
61 } else {
62 state->vs_3v=1;
63 state->vs_Xv=0;
64 }
65 }
66
67 static int
68 simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
69 const socket_state_t *state)
70 {
71 unsigned long flags;
72
73 local_irq_save(flags);
74
75 /* Murphy: see table of MIC2562a-1 */
76 switch (state->Vcc) {
77 case 0:
78 clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
79 break;
80
81 case 33:
82 clear_cs3_bit(VCC_3V_EN|EN1);
83 set_cs3_bit(VCC_5V_EN|EN0);
84 break;
85
86 case 50:
87 clear_cs3_bit(VCC_5V_EN|EN1);
88 set_cs3_bit(VCC_3V_EN|EN0);
89 break;
90
91 default:
92 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
93 __func__, state->Vcc);
94 clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
95 local_irq_restore(flags);
96 return -1;
97 }
98
99
100 local_irq_restore(flags);
101
102 return 0;
103 }
104
105 static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
106 {
107 soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
108 }
109
110 static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
111 {
112 soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
113 set_cs3_bit(PCMCIA_RESET);
114 }
115
116 static struct pcmcia_low_level simpad_pcmcia_ops = {
117 .owner = THIS_MODULE,
118 .hw_init = simpad_pcmcia_hw_init,
119 .hw_shutdown = simpad_pcmcia_hw_shutdown,
120 .socket_state = simpad_pcmcia_socket_state,
121 .configure_socket = simpad_pcmcia_configure_socket,
122 .socket_init = simpad_pcmcia_socket_init,
123 .socket_suspend = simpad_pcmcia_socket_suspend,
124 };
125
126 int __init pcmcia_simpad_init(struct device *dev)
127 {
128 int ret = -ENODEV;
129
130 if (machine_is_simpad())
131 ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
132
133 return ret;
134 }
135
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