1 /*
2 * drivers/pcmcia/sa1100_graphicsclient.c
3 *
4 * PCMCIA implementation routines for Graphics Client Plus
5 *
6 * 9/12/01 Woojung
7 * Turn power OFF at startup
8 * 1/31/2001 Woojung Huh
9 * Fix for GC Plus PCMCIA Reset Problem
10 * 2/27/2001 Woojung Huh [whuh@applieddata.net]
11 * Fix
12 *
13 */
14 #include <linux/kernel.h>
15 #include <linux/sched.h>
16 #include <linux/delay.h>
17
18 #include <asm/hardware.h>
19 #include <asm/irq.h>
20 #include "sa1100_generic.h"
21
22 #error This is broken!
23
24 #define S0_CD_IRQ 60 // Socket 0 Card Detect IRQ
25 #define S0_STS_IRQ 55 // Socket 0 PCMCIA IRQ
26
27 static volatile unsigned long *PCMCIA_Status =
28 ((volatile unsigned long *) ADS_p2v(_ADS_CS_STATUS));
29
30 static volatile unsigned long *PCMCIA_Power =
31 ((volatile unsigned long *) ADS_p2v(_ADS_CS_PR));
32
gcplus_pcmcia_init(struct pcmcia_init * init)33 static int gcplus_pcmcia_init(struct pcmcia_init *init)
34 {
35 int irq, res;
36
37 // Reset PCMCIA
38 // Reset Timing for CPLD(U2) version 8001E or later
39 *PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
40 udelay(12); // 12 uSec
41
42 *PCMCIA_Power |= ADS_CS_PR_A_RESET;
43 mdelay(30); // 30 mSec
44
45 // Turn off 5V
46 *PCMCIA_Power &= ~0x03;
47
48 /* Register interrupts */
49 irq = S0_CD_IRQ;
50 res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA 0 CD", NULL);
51 if (res < 0) {
52 printk(KERN_ERR "%s: Request for IRQ %lu failed\n", __FUNCTION__, irq);
53 return -1;
54 }
55
56 return 1; // 1 PCMCIA Slot
57 }
58
gcplus_pcmcia_shutdown(void)59 static int gcplus_pcmcia_shutdown(void)
60 {
61 /* disable IRQs */
62 free_irq( S0_CD_IRQ, NULL);
63
64 /* Shutdown PCMCIA power */
65 mdelay(2); // 2msec
66 *PCMCIA_Power &= ~0x03;
67
68 return 0;
69 }
70
gcplus_pcmcia_socket_state(struct pcmcia_state_array * state_array)71 static int gcplus_pcmcia_socket_state(struct pcmcia_state_array
72 *state_array){
73 unsigned long levels;
74
75 if(state_array->size<1) return -1;
76
77 memset(state_array->state, 0,
78 (state_array->size)*sizeof(struct pcmcia_state));
79
80 levels=*PCMCIA_Status;
81
82 state_array->state[0].detect=(levels & ADS_CS_ST_A_CD)?1:0;
83 state_array->state[0].ready=(levels & ADS_CS_ST_A_READY)?1:0;
84 state_array->state[0].bvd1= 0;
85 state_array->state[0].bvd2= 0;
86 state_array->state[0].wrprot=0;
87 state_array->state[0].vs_3v=0;
88 state_array->state[0].vs_Xv=0;
89
90 return 1;
91 }
92
gcplus_pcmcia_get_irq_info(struct pcmcia_irq_info * info)93 static int gcplus_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
94 {
95 if (info->sock > 1)
96 return -1;
97
98 if (info->sock == 0)
99 info->irq = S0_STS_IRQ;
100
101 return 0;
102 }
103
gcplus_pcmcia_configure_socket(const struct pcmcia_configure * configure)104 static int gcplus_pcmcia_configure_socket(const struct pcmcia_configure
105 *configure)
106 {
107 unsigned long flags;
108
109 if(configure->sock>1) return -1;
110
111 save_flags_cli(flags);
112
113 switch (configure->vcc) {
114 case 0:
115 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
116 break;
117
118 case 50:
119 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
120 *PCMCIA_Power |= ADS_CS_PR_A_5V_POWER;
121 break;
122
123 case 33:
124 *PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
125 *PCMCIA_Power |= ADS_CS_PR_A_3V_POWER;
126 break;
127
128 default:
129 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
130 configure->vcc);
131 restore_flags(flags);
132 return -1;
133 }
134
135 /* Silently ignore Vpp, output enable, speaker enable. */
136
137 // Reset PCMCIA
138 *PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
139 udelay(12);
140
141 *PCMCIA_Power |= ADS_CS_PR_A_RESET;
142 mdelay(30);
143
144 restore_flags(flags);
145
146 return 0;
147 }
148
gcplus_pcmcia_socket_init(int sock)149 static int gcplus_pcmcia_socket_init(int sock)
150 {
151 return 0;
152 }
153
gcplus_pcmcia_socket_suspend(int sock)154 static int gcplus_pcmcia_socket_suspend(int sock)
155 {
156 return 0;
157 }
158
159 struct pcmcia_low_level gcplus_pcmcia_ops = {
160 init: gcplus_pcmcia_init,
161 shutdown: gcplus_pcmcia_shutdown,
162 socket_state: gcplus_pcmcia_socket_state,
163 get_irq_info: gcplus_pcmcia_get_irq_info,
164 configure_socket: gcplus_pcmcia_configure_socket,
165
166 socket_init: gcplus_pcmcia_socket_init,
167 socket_suspend: gcplus_pcmcia_socket_suspend,
168 };
169
170