1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * drivers/pcmcia/sa1100_assabet.c
4 *
5 * PCMCIA implementation routines for Assabet
6 *
7 */
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/interrupt.h>
12 #include <linux/device.h>
13 #include <linux/init.h>
14 #include <linux/gpio.h>
15
16 #include <asm/mach-types.h>
17 #include <mach/assabet.h>
18
19 #include "sa1100_generic.h"
20
assabet_pcmcia_hw_init(struct soc_pcmcia_socket * skt)21 static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
22 {
23 skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
24 skt->stat[SOC_STAT_CD].name = "CF CD";
25 skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
26 skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
27 skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
28 skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
29 skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
30 skt->stat[SOC_STAT_RDY].name = "CF RDY";
31
32 return 0;
33 }
34
35 static int
assabet_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)36 assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
37 {
38 unsigned int mask;
39
40 switch (state->Vcc) {
41 case 0:
42 mask = 0;
43 break;
44
45 case 50:
46 printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
47 __func__);
48
49 case 33: /* Can only apply 3.3V to the CF slot. */
50 mask = ASSABET_BCR_CF_PWR;
51 break;
52
53 default:
54 printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
55 state->Vcc);
56 return -1;
57 }
58
59 /* Silently ignore Vpp, speaker enable. */
60
61 if (state->flags & SS_RESET)
62 mask |= ASSABET_BCR_CF_RST;
63 if (!(state->flags & SS_OUTPUT_ENA))
64 mask |= ASSABET_BCR_CF_BUS_OFF;
65
66 ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
67 ASSABET_BCR_CF_BUS_OFF, mask);
68
69 return 0;
70 }
71
72 /*
73 * Disable card status IRQs on suspend.
74 */
assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)75 static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
76 {
77 /*
78 * Tristate the CF bus signals. Also assert CF
79 * reset as per user guide page 4-11.
80 */
81 ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
82 }
83
84 static struct pcmcia_low_level assabet_pcmcia_ops = {
85 .owner = THIS_MODULE,
86 .hw_init = assabet_pcmcia_hw_init,
87 .socket_state = soc_common_cf_socket_state,
88 .configure_socket = assabet_pcmcia_configure_socket,
89 .socket_suspend = assabet_pcmcia_socket_suspend,
90 };
91
pcmcia_assabet_init(struct device * dev)92 int pcmcia_assabet_init(struct device *dev)
93 {
94 int ret = -ENODEV;
95
96 if (machine_is_assabet() && !machine_has_neponset())
97 ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
98
99 return ret;
100 }
101