ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / pcmcia / pxa2xx_balloon3.c
blob4c3e94c0ae85336a9fcee6511d570e1ab4b058e5
1 /*
2 * linux/drivers/pcmcia/pxa2xx_balloon3.c
4 * Balloon3 PCMCIA specific routines.
6 * Author: Nick Bane
7 * Created: June, 2006
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>
24 #include <linux/io.h>
26 #include <mach/balloon3.h>
28 #include <asm/mach-types.h>
30 #include "soc_common.h"
33 * These are a list of interrupt sources that provokes a polled
34 * check of status
36 static struct pcmcia_irqs irqs[] = {
37 { 0, BALLOON3_S0_CD_IRQ, "PCMCIA0 CD" },
38 { 0, BALLOON3_BP_NSTSCHG_IRQ, "PCMCIA0 STSCHG" },
41 static int balloon3_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
43 uint16_t ver;
45 ver = __raw_readw(BALLOON3_FPGA_VER);
46 if (ver < 0x4f08)
47 pr_warn("The FPGA code, version 0x%04x, is too old. "
48 "PCMCIA/CF support might be broken in this version!",
49 ver);
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)
68 uint16_t status;
69 int flip;
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 * Workaround for STSCHG which can't be deasserted:
77 * We therefore disable/enable corresponding IRQs
78 * as needed to avoid IRQ locks.
80 if (flip) {
81 balloon3_pcmcia_status[skt->nr] = status;
82 if (status & BALLOON3_CF_nSTSCHG_BVD1)
83 enable_irq(BALLOON3_BP_NSTSCHG_IRQ);
84 else
85 disable_irq(BALLOON3_BP_NSTSCHG_IRQ);
88 state->detect = !gpio_get_value(BALLOON3_GPIO_S0_CD);
89 state->ready = !!(status & BALLOON3_CF_nIRQ);
90 state->bvd1 = !!(status & BALLOON3_CF_nSTSCHG_BVD1);
91 state->bvd2 = 0; /* not available */
92 state->vs_3v = 1; /* Always true its a CF card */
93 state->vs_Xv = 0; /* not available */
94 state->wrprot = 0; /* not available */
97 static int balloon3_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
98 const socket_state_t *state)
100 __raw_writew(BALLOON3_CF_RESET, BALLOON3_CF_CONTROL_REG |
101 ((state->flags & SS_RESET) ?
102 BALLOON3_FPGA_SETnCLR : 0));
103 return 0;
106 static void balloon3_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
110 static void balloon3_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
114 static struct pcmcia_low_level balloon3_pcmcia_ops = {
115 .owner = THIS_MODULE,
116 .hw_init = balloon3_pcmcia_hw_init,
117 .hw_shutdown = balloon3_pcmcia_hw_shutdown,
118 .socket_state = balloon3_pcmcia_socket_state,
119 .configure_socket = balloon3_pcmcia_configure_socket,
120 .socket_init = balloon3_pcmcia_socket_init,
121 .socket_suspend = balloon3_pcmcia_socket_suspend,
122 .first = 0,
123 .nr = 1,
126 static struct platform_device *balloon3_pcmcia_device;
128 static int __init balloon3_pcmcia_init(void)
130 int ret;
132 if (!machine_is_balloon3())
133 return -ENODEV;
135 balloon3_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
136 if (!balloon3_pcmcia_device)
137 return -ENOMEM;
139 ret = platform_device_add_data(balloon3_pcmcia_device,
140 &balloon3_pcmcia_ops, sizeof(balloon3_pcmcia_ops));
142 if (!ret)
143 ret = platform_device_add(balloon3_pcmcia_device);
145 if (ret)
146 platform_device_put(balloon3_pcmcia_device);
148 return ret;
151 static void __exit balloon3_pcmcia_exit(void)
153 platform_device_unregister(balloon3_pcmcia_device);
156 module_init(balloon3_pcmcia_init);
157 module_exit(balloon3_pcmcia_exit);
159 MODULE_LICENSE("GPL");
160 MODULE_AUTHOR("Nick Bane <nick@cecomputing.co.uk>");
161 MODULE_ALIAS("platform:pxa2xx-pcmcia");
162 MODULE_DESCRIPTION("Balloon3 board CF/PCMCIA driver");