1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/drivers/pcmcia/pxa2xx_mainstone.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Mainstone PCMCIA specific routines.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Created: May 12, 2004
8*4882a593Smuzhiyun * Author: Nicolas Pitre
9*4882a593Smuzhiyun * Copyright: MontaVista Software Inc.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun #include <linux/gpio/consumer.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/init.h>
14*4882a593Smuzhiyun #include <linux/interrupt.h>
15*4882a593Smuzhiyun #include <linux/kernel.h>
16*4882a593Smuzhiyun #include <linux/errno.h>
17*4882a593Smuzhiyun #include <linux/platform_device.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <pcmcia/ss.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <asm/mach-types.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include "soc_common.h"
24*4882a593Smuzhiyun #include "max1600.h"
25*4882a593Smuzhiyun
mst_pcmcia_hw_init(struct soc_pcmcia_socket * skt)26*4882a593Smuzhiyun static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct device *dev = skt->socket.dev.parent;
29*4882a593Smuzhiyun struct max1600 *m;
30*4882a593Smuzhiyun int ret;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";
33*4882a593Smuzhiyun skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";
34*4882a593Smuzhiyun skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";
35*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";
36*4882a593Smuzhiyun skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";
37*4882a593Smuzhiyun skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",
40*4882a593Smuzhiyun GPIOD_OUT_HIGH);
41*4882a593Smuzhiyun if (IS_ERR(skt->gpio_reset))
42*4882a593Smuzhiyun return PTR_ERR(skt->gpio_reset);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
45*4882a593Smuzhiyun MAX1600_CODE_HIGH);
46*4882a593Smuzhiyun if (ret)
47*4882a593Smuzhiyun return ret;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun skt->driver_data = m;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun return soc_pcmcia_request_gpiods(skt);
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static unsigned int mst_pcmcia_bvd1_status[2];
55*4882a593Smuzhiyun
mst_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)56*4882a593Smuzhiyun static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57*4882a593Smuzhiyun struct pcmcia_state *state)
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->bvd1;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun /*
62*4882a593Smuzhiyun * Workaround for STSCHG which can't be deasserted:
63*4882a593Smuzhiyun * We therefore disable/enable corresponding IRQs
64*4882a593Smuzhiyun * as needed to avoid IRQ locks.
65*4882a593Smuzhiyun */
66*4882a593Smuzhiyun if (flip) {
67*4882a593Smuzhiyun mst_pcmcia_bvd1_status[skt->nr] = state->bvd1;
68*4882a593Smuzhiyun if (state->bvd1)
69*4882a593Smuzhiyun enable_irq(skt->stat[SOC_STAT_BVD1].irq);
70*4882a593Smuzhiyun else
71*4882a593Smuzhiyun disable_irq(skt->stat[SOC_STAT_BVD2].irq);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
mst_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)75*4882a593Smuzhiyun static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
76*4882a593Smuzhiyun const socket_state_t *state)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
82*4882a593Smuzhiyun .owner = THIS_MODULE,
83*4882a593Smuzhiyun .hw_init = mst_pcmcia_hw_init,
84*4882a593Smuzhiyun .socket_state = mst_pcmcia_socket_state,
85*4882a593Smuzhiyun .configure_socket = mst_pcmcia_configure_socket,
86*4882a593Smuzhiyun .nr = 2,
87*4882a593Smuzhiyun };
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct platform_device *mst_pcmcia_device;
90*4882a593Smuzhiyun
mst_pcmcia_init(void)91*4882a593Smuzhiyun static int __init mst_pcmcia_init(void)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun int ret;
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun if (!machine_is_mainstone())
96*4882a593Smuzhiyun return -ENODEV;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
99*4882a593Smuzhiyun if (!mst_pcmcia_device)
100*4882a593Smuzhiyun return -ENOMEM;
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
103*4882a593Smuzhiyun sizeof(mst_pcmcia_ops));
104*4882a593Smuzhiyun if (ret == 0)
105*4882a593Smuzhiyun ret = platform_device_add(mst_pcmcia_device);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun if (ret)
108*4882a593Smuzhiyun platform_device_put(mst_pcmcia_device);
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun return ret;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
mst_pcmcia_exit(void)113*4882a593Smuzhiyun static void __exit mst_pcmcia_exit(void)
114*4882a593Smuzhiyun {
115*4882a593Smuzhiyun platform_device_unregister(mst_pcmcia_device);
116*4882a593Smuzhiyun }
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun fs_initcall(mst_pcmcia_init);
119*4882a593Smuzhiyun module_exit(mst_pcmcia_exit);
120*4882a593Smuzhiyun
121*4882a593Smuzhiyun MODULE_LICENSE("GPL");
122*4882a593Smuzhiyun MODULE_ALIAS("platform:pxa2xx-pcmcia");
123