1 /*
2 * drivers/pcmcia/sa1100_freebird.c
3 *
4 * Created by Eric Peng <ericpeng@coventive.com>
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
freebird_pcmcia_init(struct pcmcia_init * init)15 static int freebird_pcmcia_init(struct pcmcia_init *init){
16 int irq, res;
17
18 /* Enable Linkup CF card */
19 LINKUP_PRC = 0xc0;
20 mdelay(100);
21 LINKUP_PRC = 0xc1;
22 mdelay(100);
23 LINKUP_PRC = 0xd1;
24 mdelay(100);
25 LINKUP_PRC = 0xd1;
26 mdelay(100);
27 LINKUP_PRC = 0xc0;
28
29 /* Set transition detect */
30 //set_GPIO_IRQ_edge( GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1, GPIO_BOTH_EDGES );
31 //set_GPIO_IRQ_edge( GPIO_CF_IRQ, GPIO_FALLING_EDGE );
32 set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_CD|GPIO_FREEBIRD_CF_BVD,GPIO_NO_EDGES);
33 set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_IRQ, GPIO_FALLING_EDGE);
34
35 /* Register interrupts */
36 irq = IRQ_GPIO_FREEBIRD_CF_CD;
37 res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", NULL );
38 if( res < 0 ) goto irq_err;
39 irq = IRQ_GPIO_FREEBIRD_CF_BVD;
40 res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL );
41 if( res < 0 ) goto irq_err;
42
43 /* There's only one slot, but it's "Slot 1": */
44 return 2;
45
46 irq_err:
47 printk( KERN_ERR "%s: Request for IRQ %lu failed\n", __FUNCTION__, irq );
48 return -1;
49 }
50
freebird_pcmcia_shutdown(void)51 static int freebird_pcmcia_shutdown(void)
52 {
53 /* disable IRQs */
54 free_irq( IRQ_GPIO_FREEBIRD_CF_CD, NULL );
55 free_irq( IRQ_GPIO_FREEBIRD_CF_BVD, NULL );
56
57 /* Disable CF card */
58 LINKUP_PRC = 0x40; /* SSP=1 SOE=0 */
59 mdelay(100);
60
61 return 0;
62 }
63
freebird_pcmcia_socket_state(struct pcmcia_state_array * state_array)64 static int freebird_pcmcia_socket_state(struct pcmcia_state_array
65 *state_array){
66 unsigned long levels;
67
68 if(state_array->size<2) return -1;
69
70 memset(state_array->state, 0,
71 (state_array->size)*sizeof(struct pcmcia_state));
72
73 levels = LINKUP_PRS;
74 //printk("LINKUP_PRS=%x \n",levels);
75
76 state_array->state[0].detect=
77 ((levels & (LINKUP_CD1 | LINKUP_CD2))==0)?1:0;
78
79 state_array->state[0].ready=(levels & LINKUP_RDY)?1:0;
80
81 state_array->state[0].bvd1=(levels & LINKUP_BVD1)?1:0;
82
83 state_array->state[0].bvd2=(levels & LINKUP_BVD2)?1:0;
84
85 state_array->state[0].wrprot=0; /* Not available on Assabet. */
86
87 state_array->state[0].vs_3v=1; /* Can only apply 3.3V on Assabet. */
88
89 state_array->state[0].vs_Xv=0;
90
91 return 1;
92 }
93
freebird_pcmcia_get_irq_info(struct pcmcia_irq_info * info)94 static int freebird_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
95
96 if(info->sock>1) return -1;
97
98 if(info->sock==0)
99 info->irq=IRQ_GPIO_FREEBIRD_CF_IRQ;
100
101 return 0;
102 }
103
freebird_pcmcia_configure_socket(const struct pcmcia_configure * configure)104 static int freebird_pcmcia_configure_socket(const struct pcmcia_configure
105 *configure)
106 {
107 unsigned long value, flags;
108
109 if(configure->sock>1) return -1;
110
111 if(configure->sock==1) return 0;
112
113 save_flags_cli(flags);
114
115 value = 0xc0; /* SSP=1 SOE=1 CFE=1 */
116
117 switch(configure->vcc){
118 case 0:
119
120 break;
121
122 case 50:
123 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
124 __FUNCTION__);
125
126 case 33: /* Can only apply 3.3V to the CF slot. */
127 value |= LINKUP_S1;
128 break;
129
130 default:
131 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
132 configure->vcc);
133 restore_flags(flags);
134 return -1;
135 }
136
137 if (configure->reset)
138 value = (configure->reset) ? (value | LINKUP_RESET) : (value & ~LINKUP_RESET);
139
140 /* Silently ignore Vpp, output enable, speaker enable. */
141
142 LINKUP_PRC = value;
143 //printk("LINKUP_PRC=%x\n",value);
144 restore_flags(flags);
145
146 return 0;
147 }
148
freebird_pcmcia_socket_init(int sock)149 static int freebird_pcmcia_socket_init(int sock)
150 {
151 set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_CD|GPIO_FREEBIRD_CF_BVD, GPIO_BOTH_EDGES);
152 return 0;
153 }
154
freebird_pcmcia_socket_suspend(int sock)155 static int freebird_pcmcia_socket_suspend(int sock)
156 {
157 set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_CD|GPIO_FREEBIRD_CF_BVD, GPIO_NO_EDGES);
158 return 0;
159 }
160
161 struct pcmcia_low_level freebird_pcmcia_ops = {
162 init: freebird_pcmcia_init,
163 shutdown: freebird_pcmcia_shutdown,
164 socket_state: freebird_pcmcia_socket_state,
165 get_irq_info: freebird_pcmcia_get_irq_info,
166 configure_socket: freebird_pcmcia_configure_socket,
167
168 socket_init: freebird_pcmcia_socket_init,
169 socket_suspend: freebird_pcmcia_socket_suspend,
170 };
171
172