1 /*
2 * drivers/pcmcia/sa1100_h3600.c
3 *
4 * PCMCIA implementation routines for H3600
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 static struct irqs {
15 int irq;
16 const char *str;
17 } irqs[] = {
18 { IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
19 { IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
20 };
21
h3600_pcmcia_init(struct pcmcia_init * init)22 static int h3600_pcmcia_init(struct pcmcia_init *init)
23 {
24 int i, res;
25
26 /*
27 * Set transition detect
28 */
29 set_GPIO_IRQ_edge(GPIO_H3600_PCMCIA_IRQ0 | GPIO_H3600_PCMCIA_IRQ1,
30 GPIO_FALLING_EDGE);
31
32 /*
33 * Register interrupts
34 */
35 for (i = res = 0; i < ARRAY_SIZE(irqs); i++) {
36 res = request_irq(irqs[i].irq, init->handler, SA_INTERRUPT,
37 irqs[i].str, NULL);
38 if (res)
39 break;
40 }
41
42 if (res) {
43 printk(KERN_ERR "h3600_pcmcia: request for IRQ%d failed: %d\n",
44 irqs[i].irq, res);
45
46 while (i--)
47 free_irq(irqs[i].irq, NULL);
48 }
49
50 return res ? -1 : 2;
51 }
52
h3600_pcmcia_shutdown(void)53 static int h3600_pcmcia_shutdown(void)
54 {
55 int i;
56
57 /*
58 * disable IRQs
59 */
60 for (i = 0; i < ARRAY_SIZE(irqs); i++)
61 free_irq(irqs[i].irq, NULL);
62
63 /* Disable CF bus: */
64 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
65 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
66 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
67
68 return 0;
69 }
70
71 static int
h3600_pcmcia_socket_state(struct pcmcia_state_array * state)72 h3600_pcmcia_socket_state(struct pcmcia_state_array *state)
73 {
74 unsigned long levels;
75
76 if (state->size < 2)
77 return -1;
78
79 levels = GPLR;
80
81 state->state[0].detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
82 state->state[0].ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
83 state->state[0].bvd1 = 0;
84 state->state[0].bvd2 = 0;
85 state->state[0].wrprot = 0; /* Not available on H3600. */
86 state->state[0].vs_3v = 0;
87 state->state[0].vs_Xv = 0;
88
89 state->state[1].detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
90 state->state[1].ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
91 state->state[1].bvd1 = 0;
92 state->state[1].bvd2 = 0;
93 state->state[1].wrprot = 0; /* Not available on H3600. */
94 state->state[1].vs_3v = 0;
95 state->state[1].vs_Xv = 0;
96
97 return 1;
98 }
99
h3600_pcmcia_get_irq_info(struct pcmcia_irq_info * info)100 static int h3600_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
101 {
102 switch (info->sock) {
103 case 0:
104 info->irq = IRQ_GPIO_H3600_PCMCIA_IRQ0;
105 break;
106 case 1:
107 info->irq = IRQ_GPIO_H3600_PCMCIA_IRQ1;
108 break;
109 default:
110 return -1;
111 }
112 return 0;
113 }
114
115 static int
h3600_pcmcia_configure_socket(const struct pcmcia_configure * conf)116 h3600_pcmcia_configure_socket(const struct pcmcia_configure *conf)
117 {
118 if (conf->sock > 1)
119 return -1;
120
121 if (conf->vcc != 0 && conf->vcc != 33 && conf->vcc != 50) {
122 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
123 conf->vcc / 10, conf->vcc % 10);
124 return -1;
125 }
126
127 if (conf->reset)
128 set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
129 else
130 clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
131
132 /* Silently ignore Vpp, output enable, speaker enable. */
133
134 return 0;
135 }
136
h3600_pcmcia_socket_init(int sock)137 static int h3600_pcmcia_socket_init(int sock)
138 {
139 /* Enable CF bus: */
140 set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
141 set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
142 clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
143
144 set_current_state(TASK_UNINTERRUPTIBLE);
145 schedule_timeout(10*HZ / 1000);
146
147 switch (sock) {
148 case 0:
149 set_GPIO_IRQ_edge(GPIO_H3600_PCMCIA_CD0, GPIO_BOTH_EDGES);
150 break;
151 case 1:
152 set_GPIO_IRQ_edge(GPIO_H3600_PCMCIA_CD1, GPIO_BOTH_EDGES);
153 break;
154 }
155
156 return 0;
157 }
158
h3600_pcmcia_socket_suspend(int sock)159 static int h3600_pcmcia_socket_suspend(int sock)
160 {
161 switch (sock) {
162 case 0:
163 set_GPIO_IRQ_edge(GPIO_H3600_PCMCIA_CD0, GPIO_NO_EDGES);
164 break;
165 case 1:
166 set_GPIO_IRQ_edge(GPIO_H3600_PCMCIA_CD1, GPIO_NO_EDGES);
167 break;
168 }
169
170 /*
171 * FIXME: This doesn't fit well. We don't have the mechanism in
172 * the generic PCMCIA layer to deal with the idea of two sockets
173 * on one bus. We rely on the cs.c behaviour shutting down
174 * socket 0 then socket 1.
175 */
176 if (sock == 1) {
177 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
178 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
179 /* hmm, does this suck power? */
180 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
181 }
182
183 return 0;
184 }
185
186 struct pcmcia_low_level h3600_pcmcia_ops = {
187 init: h3600_pcmcia_init,
188 shutdown: h3600_pcmcia_shutdown,
189 socket_state: h3600_pcmcia_socket_state,
190 get_irq_info: h3600_pcmcia_get_irq_info,
191 configure_socket: h3600_pcmcia_configure_socket,
192
193 socket_init: h3600_pcmcia_socket_init,
194 socket_suspend: h3600_pcmcia_socket_suspend,
195 };
196
197