1 /*
2 * drivers/pcmcia/sa1100_yopy.c
3 *
4 * PCMCIA implementation routines for Yopy
5 *
6 */
7 #include <linux/kernel.h>
8 #include <linux/sched.h>
9
10 #include <asm/hardware.h>
11 #include <asm/irq.h>
12 #include "sa1100_generic.h"
13
14
pcmcia_power(int on)15 static inline void pcmcia_power(int on) {
16 /* high for power up */
17 yopy_gpio_set(GPIO_CF_POWER, on);
18 }
19
pcmcia_reset(int reset)20 static inline void pcmcia_reset(int reset)
21 {
22 /* high for reset */
23 yopy_gpio_set(GPIO_CF_RESET, reset);
24 }
25
yopy_pcmcia_init(struct pcmcia_init * init)26 static int yopy_pcmcia_init(struct pcmcia_init *init)
27 {
28 int irq, res;
29
30 pcmcia_power(0);
31 pcmcia_reset(1);
32
33 /* Set transition detect */
34 set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
35 GPIO_NO_EDGES);
36 set_GPIO_IRQ_edge( GPIO_CF_IREQ, GPIO_FALLING_EDGE );
37
38 /* Register interrupts */
39 irq = IRQ_CF_CD;
40 res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_CD", NULL);
41 if (res < 0) goto irq_err;
42 irq = IRQ_CF_BVD2;
43 res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD2", NULL);
44 if (res < 0) goto irq_err;
45 irq = IRQ_CF_BVD1;
46 res = request_irq(irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL);
47 if (res < 0) goto irq_err;
48
49 return 1;
50 irq_err:
51 printk(KERN_ERR "%s: Request for IRQ %d failed\n", __FUNCTION__, irq);
52 return -1;
53 }
54
yopy_pcmcia_shutdown(void)55 static int yopy_pcmcia_shutdown(void)
56 {
57 /* disable IRQs */
58 free_irq( IRQ_CF_CD, NULL );
59 free_irq( IRQ_CF_BVD2, NULL );
60 free_irq( IRQ_CF_BVD1, NULL );
61
62 /* Disable CF */
63 pcmcia_reset(1);
64 pcmcia_power(0);
65
66 return 0;
67 }
68
yopy_pcmcia_socket_state(struct pcmcia_state_array * state_array)69 static int yopy_pcmcia_socket_state(struct pcmcia_state_array *state_array)
70 {
71 unsigned long levels;
72
73 if (state_array->size != 1)
74 return -1;
75
76 memset(state_array->state, 0,
77 state_array->size * sizeof(struct pcmcia_state));
78
79 levels = GPLR;
80
81 state_array->state[0].detect = (levels & GPIO_CF_CD) ? 0 : 1;
82 state_array->state[0].ready = (levels & GPIO_CF_READY) ? 1 : 0;
83 state_array->state[0].bvd1 = (levels & GPIO_CF_BVD1) ? 1 : 0;
84 state_array->state[0].bvd2 = (levels & GPIO_CF_BVD2) ? 1 : 0;
85 state_array->state[0].wrprot = 0; /* Not available on Yopy. */
86 state_array->state[0].vs_3v = 0; /* FIXME Can only apply 3.3V on Yopy. */
87 state_array->state[0].vs_Xv = 0;
88
89 return 1;
90 }
91
yopy_pcmcia_get_irq_info(struct pcmcia_irq_info * info)92 static int yopy_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
93 {
94 if (info->sock != 0)
95 return -1;
96
97 info->irq = IRQ_CF_IREQ;
98
99 return 0;
100 }
101
yopy_pcmcia_configure_socket(const struct pcmcia_configure * configure)102 static int yopy_pcmcia_configure_socket(const struct pcmcia_configure *configure)
103 {
104 if (configure->sock != 0)
105 return -1;
106
107 switch (configure->vcc) {
108 case 0: /* power off */;
109 pcmcia_power(0);
110 break;
111 case 50:
112 printk(KERN_WARNING __FUNCTION__"(): CS asked for 5V, applying 3.3V..\n");
113 case 33:
114 pcmcia_power(1);
115 break;
116 default:
117 printk(KERN_ERR __FUNCTION__"(): unrecognized Vcc %u\n",
118 configure->vcc);
119 return -1;
120 }
121
122 pcmcia_reset(configure->reset);
123
124 /* Silently ignore Vpp, output enable, speaker enable. */
125
126 return 0;
127 }
128
yopy_pcmcia_socket_init(int sock)129 static int yopy_pcmcia_socket_init(int sock)
130 {
131 set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
132 GPIO_BOTH_EDGES);
133 return 0;
134 }
135
yopy_pcmcia_socket_suspend(int sock)136 static int yopy_pcmcia_socket_suspend(int sock)
137 {
138 set_GPIO_IRQ_edge(GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1,
139 GPIO_NO_EDGES);
140 return 0;
141 }
142
143 struct pcmcia_low_level yopy_pcmcia_ops = {
144 init: yopy_pcmcia_init,
145 shutdown: yopy_pcmcia_shutdown,
146 socket_state: yopy_pcmcia_socket_state,
147 get_irq_info: yopy_pcmcia_get_irq_info,
148 configure_socket: yopy_pcmcia_configure_socket,
149
150 socket_init: yopy_pcmcia_socket_init,
151 socket_suspend: yopy_pcmcia_socket_suspend,
152 };
153