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1/*
2 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
3 *
4 * TRIZEPS PCMCIA specific routines.
5 *
6 * Author: Jürgen Schindele
7 * Created: 20 02, 2006
8 * Copyright: Jürgen Schindele
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/gpio.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21
22#include <asm/mach-types.h>
23#include <asm/irq.h>
24
25#include <mach/pxa2xx-regs.h>
26#include <mach/trizeps4.h>
27
28#include "soc_common.h"
29
30extern void board_pcmcia_power(int power);
31
32static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
33{
34 /* we dont have voltage/card/ready detection
35 * so we dont need interrupts for it
36 */
37 switch (skt->nr) {
38 case 0:
39 skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
40 skt->stat[SOC_STAT_CD].name = "cs0_cd";
41 skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
42 skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
43 break;
44 default:
45 break;
46 }
47 /* release the reset of this card */
48 pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
49
50 return 0;
51}
52
53static unsigned long trizeps_pcmcia_status[2];
54
55static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
56 struct pcmcia_state *state)
57{
58 unsigned short status = 0, change;
59 status = CFSR_readw();
60 change = (status ^ trizeps_pcmcia_status[skt->nr]) &
61 ConXS_CFSR_BVD_MASK;
62 if (change) {
63 trizeps_pcmcia_status[skt->nr] = status;
64 if (status & ConXS_CFSR_BVD1) {
65 /* enable_irq empty */
66 } else {
67 /* disable_irq empty */
68 }
69 }
70
71 switch (skt->nr) {
72 case 0:
73 /* just fill in fix states */
74 state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
75 state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
76 state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
77 state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
78 break;
79
80#ifndef CONFIG_MACH_TRIZEPS_CONXS
81 /* on ConXS we only have one slot. Second is inactive */
82 case 1:
83 state->detect = 0;
84 state->ready = 0;
85 state->bvd1 = 0;
86 state->bvd2 = 0;
87 state->vs_3v = 0;
88 state->vs_Xv = 0;
89 break;
90
91#endif
92 }
93}
94
95static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
96 const socket_state_t *state)
97{
98 int ret = 0;
99 unsigned short power = 0;
100
101 /* we do nothing here just check a bit */
102 switch (state->Vcc) {
103 case 0: power &= 0xfc; break;
104 case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
105 case 50:
106 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
107 break;
108 default:
109 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
110 ret = -1;
111 }
112
113 switch (state->Vpp) {
114 case 0: power &= 0xf3; break;
115 case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
116 case 120:
117 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
118 break;
119 default:
120 if (state->Vpp != state->Vcc) {
121 pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
122 ret = -1;
123 }
124 }
125
126 switch (skt->nr) {
127 case 0: /* we only have 3.3V */
128 board_pcmcia_power(power);
129 break;
130
131#ifndef CONFIG_MACH_TRIZEPS_CONXS
132 /* on ConXS we only have one slot. Second is inactive */
133 case 1:
134#endif
135 default:
136 break;
137 }
138
139 return ret;
140}
141
142static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
143{
144 /* default is on */
145 board_pcmcia_power(0x9);
146}
147
148static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
149{
150 board_pcmcia_power(0x0);
151}
152
153static struct pcmcia_low_level trizeps_pcmcia_ops = {
154 .owner = THIS_MODULE,
155 .hw_init = trizeps_pcmcia_hw_init,
156 .socket_state = trizeps_pcmcia_socket_state,
157 .configure_socket = trizeps_pcmcia_configure_socket,
158 .socket_init = trizeps_pcmcia_socket_init,
159 .socket_suspend = trizeps_pcmcia_socket_suspend,
160#ifdef CONFIG_MACH_TRIZEPS_CONXS
161 .nr = 1,
162#else
163 .nr = 2,
164#endif
165 .first = 0,
166};
167
168static struct platform_device *trizeps_pcmcia_device;
169
170static int __init trizeps_pcmcia_init(void)
171{
172 int ret;
173
174 if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
175 return -ENODEV;
176
177 trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
178 if (!trizeps_pcmcia_device)
179 return -ENOMEM;
180
181 ret = platform_device_add_data(trizeps_pcmcia_device,
182 &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
183
184 if (ret == 0)
185 ret = platform_device_add(trizeps_pcmcia_device);
186
187 if (ret)
188 platform_device_put(trizeps_pcmcia_device);
189
190 return ret;
191}
192
193static void __exit trizeps_pcmcia_exit(void)
194{
195 platform_device_unregister(trizeps_pcmcia_device);
196}
197
198fs_initcall(trizeps_pcmcia_init);
199module_exit(trizeps_pcmcia_exit);
200
201MODULE_LICENSE("GPL");
202MODULE_AUTHOR("Juergen Schindele");
203MODULE_ALIAS("platform:pxa2xx-pcmcia");
204

Warning: That file was not part of the compilation database. It may have many parsing errors.