2 * drivers/pcmcia/sa1100_nanoengine.c
4 * PCMCIA implementation routines for BSI nanoEngine.
6 * In order to have a fully functional pcmcia subsystem in a BSE nanoEngine
7 * board you should carefully read this:
8 * http://cambuca.ldhs.cetuc.puc-rio.br/nanoengine/
10 * Copyright (C) 2010 Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
12 * Based on original work for kernel 2.4 by
13 * Miguel Freitas <miguel@cpti.cetuc.puc-rio.br>
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License version 2 as
17 * published by the Free Software Foundation.
20 #include <linux/device.h>
21 #include <linux/errno.h>
22 #include <linux/gpio.h>
23 #include <linux/interrupt.h>
24 #include <linux/irq.h>
25 #include <linux/init.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/signal.h>
30 #include <asm/mach-types.h>
33 #include <mach/hardware.h>
34 #include <mach/nanoengine.h>
36 #include "sa1100_generic.h"
38 struct nanoengine_pins
{
40 unsigned clear_outputs
;
46 static struct nanoengine_pins nano_skts
[] = {
48 .gpio_rst
= GPIO_PC_RESET0
,
49 .gpio_cd
= GPIO_PC_CD0
,
50 .gpio_rdy
= GPIO_PC_READY0
,
52 .gpio_rst
= GPIO_PC_RESET1
,
53 .gpio_cd
= GPIO_PC_CD1
,
54 .gpio_rdy
= GPIO_PC_READY1
,
58 unsigned num_nano_pcmcia_sockets
= ARRAY_SIZE(nano_skts
);
60 static int nanoengine_pcmcia_hw_init(struct soc_pcmcia_socket
*skt
)
65 if (i
>= num_nano_pcmcia_sockets
)
68 ret
= gpio_request_one(nano_skts
[i
].gpio_rst
, GPIOF_OUT_INIT_LOW
,
69 i
? "PC RST1" : "PC RST0");
73 skt
->stat
[SOC_STAT_CD
].gpio
= nano_skts
[i
].gpio_cd
;
74 skt
->stat
[SOC_STAT_CD
].name
= i
? "PC CD1" : "PC CD0";
75 skt
->stat
[SOC_STAT_RDY
].gpio
= nano_skts
[i
].gpio_rdy
;
76 skt
->stat
[SOC_STAT_RDY
].name
= i
? "PC RDY1" : "PC RDY0";
81 static void nanoengine_pcmcia_hw_shutdown(struct soc_pcmcia_socket
*skt
)
83 gpio_free(nano_skts
[skt
->nr
].gpio_rst
);
86 static int nanoengine_pcmcia_configure_socket(
87 struct soc_pcmcia_socket
*skt
, const socket_state_t
*state
)
91 if (i
>= num_nano_pcmcia_sockets
)
94 gpio_set_value(nano_skts
[skt
->nr
].gpio_rst
, !!(state
->flags
& SS_RESET
));
99 static void nanoengine_pcmcia_socket_state(
100 struct soc_pcmcia_socket
*skt
, struct pcmcia_state
*state
)
102 unsigned i
= skt
->nr
;
104 if (i
>= num_nano_pcmcia_sockets
)
109 state
->vs_3v
= 1; /* Can only apply 3.3V */
113 static struct pcmcia_low_level nanoengine_pcmcia_ops
= {
114 .owner
= THIS_MODULE
,
116 .hw_init
= nanoengine_pcmcia_hw_init
,
117 .hw_shutdown
= nanoengine_pcmcia_hw_shutdown
,
119 .configure_socket
= nanoengine_pcmcia_configure_socket
,
120 .socket_state
= nanoengine_pcmcia_socket_state
,
123 int pcmcia_nanoengine_init(struct device
*dev
)
127 if (machine_is_nanoengine())
128 ret
= sa11xx_drv_pcmcia_probe(
129 dev
, &nanoengine_pcmcia_ops
, 0, 2);