tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/pcmcia/pxa2xx_mainstone.c
3 *
4 * Mainstone PCMCIA specific routines.
5 *
6 * Created: May 12, 2004
7 * Author: Nicolas Pitre
8 * Copyright: MontaVista Software Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/module.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/errno.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21
22#include <pcmcia/ss.h>
23
24#include <mach/hardware.h>
25#include <asm/mach-types.h>
26#include <asm/irq.h>
27
28#include <mach/pxa-regs.h>
29#include <mach/mainstone.h>
30
31#include "soc_common.h"
32
33
34static struct pcmcia_irqs irqs[] = {
35 { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
36 { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
37 { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
38 { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
39};
40
41static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42{
43 /*
44 * Setup default state of GPIO outputs
45 * before we enable them as outputs.
46 */
47
48 skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
49 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
50}
51
52static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
53{
54 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
55}
56
57static unsigned long mst_pcmcia_status[2];
58
59static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
60 struct pcmcia_state *state)
61{
62 unsigned long status, flip;
63
64 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
65 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
66
67 /*
68 * Workaround for STSCHG which can't be deasserted:
69 * We therefore disable/enable corresponding IRQs
70 * as needed to avoid IRQ locks.
71 */
72 if (flip) {
73 mst_pcmcia_status[skt->nr] = status;
74 if (status & MST_PCMCIA_nSTSCHG_BVD1)
75 enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
76 : MAINSTONE_S1_STSCHG_IRQ );
77 else
78 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
79 : MAINSTONE_S1_STSCHG_IRQ );
80 }
81
82 state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
83 state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
84 state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
85 state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
86 state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
87 state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
88 state->wrprot = 0; /* not available */
89}
90
91static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
92 const socket_state_t *state)
93{
94 unsigned long power = 0;
95 int ret = 0;
96
97 switch (state->Vcc) {
98 case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
99 case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
100 case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
101 default:
102 printk(KERN_ERR "%s(): bad Vcc %u\n",
103 __func__, state->Vcc);
104 ret = -1;
105 }
106
107 switch (state->Vpp) {
108 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
109 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
110 default:
111 if(state->Vpp == state->Vcc) {
112 power |= MST_PCMCIA_PWR_VPP_VCC;
113 } else {
114 printk(KERN_ERR "%s(): bad Vpp %u\n",
115 __func__, state->Vpp);
116 ret = -1;
117 }
118 }
119
120 if (state->flags & SS_RESET)
121 power |= MST_PCMCIA_RESET;
122
123 switch (skt->nr) {
124 case 0: MST_PCMCIA0 = power; break;
125 case 1: MST_PCMCIA1 = power; break;
126 default: ret = -1;
127 }
128
129 return ret;
130}
131
132static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
133{
134}
135
136static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
137{
138}
139
140static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
141 .owner = THIS_MODULE,
142 .hw_init = mst_pcmcia_hw_init,
143 .hw_shutdown = mst_pcmcia_hw_shutdown,
144 .socket_state = mst_pcmcia_socket_state,
145 .configure_socket = mst_pcmcia_configure_socket,
146 .socket_init = mst_pcmcia_socket_init,
147 .socket_suspend = mst_pcmcia_socket_suspend,
148 .nr = 2,
149};
150
151static struct platform_device *mst_pcmcia_device;
152
153static int __init mst_pcmcia_init(void)
154{
155 int ret;
156
157 if (!machine_is_mainstone())
158 return -ENODEV;
159
160 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
161 if (!mst_pcmcia_device)
162 return -ENOMEM;
163
164 ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
165 sizeof(mst_pcmcia_ops));
166 if (ret == 0)
167 ret = platform_device_add(mst_pcmcia_device);
168
169 if (ret)
170 platform_device_put(mst_pcmcia_device);
171
172 return ret;
173}
174
175static void __exit mst_pcmcia_exit(void)
176{
177 platform_device_unregister(mst_pcmcia_device);
178}
179
180fs_initcall(mst_pcmcia_init);
181module_exit(mst_pcmcia_exit);
182
183MODULE_LICENSE("GPL");
184MODULE_ALIAS("platform:pxa2xx-pcmcia");