1 /*
2 * drivers/pcmcia/sa1100_assabet.c
3 *
4 * PCMCIA implementation routines for Assabet
5 *
6 */
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/errno.h>
10 #include <linux/interrupt.h>
11 #include <linux/device.h>
12 #include <linux/init.h>
13 #include <linux/gpio.h>
14
15 #include <asm/mach-types.h>
16 #include <mach/assabet.h>
17
18 #include "sa1100_generic.h"
19
assabet_pcmcia_hw_init(struct soc_pcmcia_socket * skt)20 static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
21 {
22 skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
23 skt->stat[SOC_STAT_CD].name = "CF CD";
24 skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
25 skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
26 skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
27 skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
28 skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
29 skt->stat[SOC_STAT_RDY].name = "CF RDY";
30
31 return 0;
32 }
33
34 static void
assabet_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)35 assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
36 {
37 state->vs_3v = 1; /* Can only apply 3.3V on Assabet. */
38 state->vs_Xv = 0;
39 }
40
41 static int
assabet_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)42 assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
43 {
44 unsigned int mask;
45
46 switch (state->Vcc) {
47 case 0:
48 mask = 0;
49 break;
50
51 case 50:
52 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
53 __func__);
54
55 case 33: /* Can only apply 3.3V to the CF slot. */
56 mask = ASSABET_BCR_CF_PWR;
57 break;
58
59 default:
60 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
61 state->Vcc);
62 return -1;
63 }
64
65 /* Silently ignore Vpp, speaker enable. */
66
67 if (state->flags & SS_RESET)
68 mask |= ASSABET_BCR_CF_RST;
69 if (!(state->flags & SS_OUTPUT_ENA))
70 mask |= ASSABET_BCR_CF_BUS_OFF;
71
72 ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
73 ASSABET_BCR_CF_BUS_OFF, mask);
74
75 return 0;
76 }
77
78 /*
79 * Disable card status IRQs on suspend.
80 */
assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)81 static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
82 {
83 /*
84 * Tristate the CF bus signals. Also assert CF
85 * reset as per user guide page 4-11.
86 */
87 ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
88 }
89
90 static struct pcmcia_low_level assabet_pcmcia_ops = {
91 .owner = THIS_MODULE,
92 .hw_init = assabet_pcmcia_hw_init,
93 .socket_state = assabet_pcmcia_socket_state,
94 .configure_socket = assabet_pcmcia_configure_socket,
95 .socket_suspend = assabet_pcmcia_socket_suspend,
96 };
97
pcmcia_assabet_init(struct device * dev)98 int __devinit pcmcia_assabet_init(struct device *dev)
99 {
100 int ret = -ENODEV;
101
102 if (machine_is_assabet() && !machine_has_neponset())
103 ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
104
105 return ret;
106 }
107