1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/pcmcia/pxa2xx_stargate2.c
5 * Stargate 2 PCMCIA specific routines.
7 * Created: December 6, 2005
9 * Copyright: Intel Corp 2005
10 * Jonathan Cameron <jic23@cam.ac.uk> 2009
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/interrupt.h>
17 #include <linux/delay.h>
18 #include <linux/platform_device.h>
19 #include <linux/gpio.h>
21 #include <pcmcia/ss.h>
24 #include <asm/mach-types.h>
26 #include "soc_common.h"
28 #define SG2_S0_POWER_CTL 108
29 #define SG2_S0_GPIO_RESET 82
30 #define SG2_S0_GPIO_DETECT 53
31 #define SG2_S0_GPIO_READY 81
33 static struct gpio sg2_pcmcia_gpios[] = {
34 { SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
35 { SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
38 static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
40 skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
41 skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
42 skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
43 skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
47 static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
48 struct pcmcia_state *state)
50 state->bvd1 = 0; /* not available - battery detect on card */
51 state->bvd2 = 0; /* not available */
52 state->vs_3v = 1; /* not available - voltage detect for card */
53 state->vs_Xv = 0; /* not available */
56 static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
57 const socket_state_t *state)
59 /* Enable card power */
62 /* sets power ctl register high */
63 gpio_set_value(SG2_S0_POWER_CTL, 1);
67 /* sets power control register low (clear) */
68 gpio_set_value(SG2_S0_POWER_CTL, 0);
72 pr_err("%s(): bad Vcc %u\n",
73 __func__, state->Vcc);
78 gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
83 static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
85 .hw_init = sg2_pcmcia_hw_init,
86 .socket_state = sg2_pcmcia_socket_state,
87 .configure_socket = sg2_pcmcia_configure_socket,
91 static struct platform_device *sg2_pcmcia_device;
93 static int __init sg2_pcmcia_init(void)
97 if (!machine_is_stargate2())
100 sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
101 if (!sg2_pcmcia_device)
104 ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
106 goto error_put_platform_device;
108 ret = platform_device_add_data(sg2_pcmcia_device,
110 sizeof(sg2_pcmcia_ops));
112 goto error_free_gpios;
114 ret = platform_device_add(sg2_pcmcia_device);
116 goto error_free_gpios;
120 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
121 error_put_platform_device:
122 platform_device_put(sg2_pcmcia_device);
127 static void __exit sg2_pcmcia_exit(void)
129 platform_device_unregister(sg2_pcmcia_device);
130 gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
133 fs_initcall(sg2_pcmcia_init);
134 module_exit(sg2_pcmcia_exit);
136 MODULE_LICENSE("GPL");
137 MODULE_ALIAS("platform:pxa2xx-pcmcia");