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