2 * linux/drivers/pcmcia/pxa2xx_balloon3.c
4 * Balloon3 PCMCIA specific routines.
8 * Copyright: Toby Churchill Ltd
9 * Derived from pxa2xx_mainstone.c, by Nico Pitre
11 * Various modification by Marek Vasut <marek.vasut@gmail.com>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/module.h>
19 #include <linux/gpio.h>
20 #include <linux/errno.h>
21 #include <linux/interrupt.h>
22 #include <linux/platform_device.h>
23 #include <linux/irq.h>
26 #include <mach/balloon3.h>
28 #include "soc_common.h"
31 * These are a list of interrupt sources that provokes a polled
34 static struct pcmcia_irqs irqs
[] = {
35 { 0, BALLOON3_S0_CD_IRQ
, "PCMCIA0 CD" },
36 { 0, BALLOON3_BP_NSTSCHG_IRQ
, "PCMCIA0 STSCHG" },
39 static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket
*skt
)
43 static void __iomem
*fpga_ver
;
45 ver
= __raw_readw(BALLOON3_FPGA_VER
);
47 pr_warn("The FPGA code, version 0x%04x, is newer than rel-0.3. "
48 "PCMCIA/CF support might be broken in this version!",
51 skt
->socket
.pci_irq
= BALLOON3_BP_CF_NRDY_IRQ
;
52 return soc_pcmcia_request_irqs(skt
, irqs
, ARRAY_SIZE(irqs
));
55 static void balloon3_pcmcia_hw_shutdown(struct soc_pcmcia_socket
*skt
)
57 soc_pcmcia_free_irqs(skt
, irqs
, ARRAY_SIZE(irqs
));
60 static unsigned long balloon3_pcmcia_status
[2] = {
61 BALLOON3_CF_nSTSCHG_BVD1
,
62 BALLOON3_CF_nSTSCHG_BVD1
65 static void balloon3_pcmcia_socket_state(struct soc_pcmcia_socket
*skt
,
66 struct pcmcia_state
*state
)
71 /* This actually reads the STATUS register */
72 status
= __raw_readw(BALLOON3_CF_STATUS_REG
);
73 flip
= (status
^ balloon3_pcmcia_status
[skt
->nr
])
74 & BALLOON3_CF_nSTSCHG_BVD1
;
76 balloon3_pcmcia_status
[skt
->nr
] = status
;
77 if (status
& BALLOON3_CF_nSTSCHG_BVD1
)
78 enable_irq(BALLOON3_BP_NSTSCHG_IRQ
);
80 disable_irq(BALLOON3_BP_NSTSCHG_IRQ
);
83 state
->detect
= !gpio_get_value(BALLOON3_GPIO_S0_CD
);
84 state
->ready
= !!(status
& BALLOON3_CF_nIRQ
);
85 state
->bvd1
= !!(status
& BALLOON3_CF_nSTSCHG_BVD1
);
86 state
->bvd2
= 0; /* not available */
87 state
->vs_3v
= 1; /* Always true its a CF card */
88 state
->vs_Xv
= 0; /* not available */
89 state
->wrprot
= 0; /* not available */
92 static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket
*skt
,
93 const socket_state_t
*state
)
95 __raw_writew((state
->flags
& SS_RESET
) ? BALLOON3_CF_RESET
: 0,
96 BALLOON3_CF_CONTROL_REG
);
100 static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket
*skt
)
104 static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket
*skt
)
108 static struct pcmcia_low_level balloon3_pcmcia_ops
= {
109 .owner
= THIS_MODULE
,
110 .hw_init
= balloon3_pcmcia_hw_init
,
111 .hw_shutdown
= balloon3_pcmcia_hw_shutdown
,
112 .socket_state
= balloon3_pcmcia_socket_state
,
113 .configure_socket
= balloon3_pcmcia_configure_socket
,
114 .socket_init
= balloon3_pcmcia_socket_init
,
115 .socket_suspend
= balloon3_pcmcia_socket_suspend
,
120 static struct platform_device
*balloon3_pcmcia_device
;
122 static int __init
balloon3_pcmcia_init(void)
126 balloon3_pcmcia_device
= platform_device_alloc("pxa2xx-pcmcia", -1);
127 if (!balloon3_pcmcia_device
)
130 ret
= platform_device_add_data(balloon3_pcmcia_device
,
131 &balloon3_pcmcia_ops
, sizeof(balloon3_pcmcia_ops
));
134 ret
= platform_device_add(balloon3_pcmcia_device
);
137 platform_device_put(balloon3_pcmcia_device
);
142 static void __exit
balloon3_pcmcia_exit(void)
144 platform_device_unregister(balloon3_pcmcia_device
);
147 module_init(balloon3_pcmcia_init
);
148 module_exit(balloon3_pcmcia_exit
);
150 MODULE_LICENSE("GPL");
151 MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>");
152 MODULE_ALIAS("platform:pxa2xx-pcmcia");
153 MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver");