tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 *
3 * MyCable board specific pcmcia routines.
4 *
5 * Copyright 2003 MontaVista Software Inc.
6 * Author: Pete Popov, MontaVista Software, Inc.
7 * ppopov@mvista.com or source@mvista.com
8 *
9 * ########################################################################
10 *
11 * This program is free software; you can distribute it and/or modify it
12 * under the terms of the GNU General Public License (Version 2) as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * for more details.
19 *
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 *
24 * ########################################################################
25 *
26 *
27 */
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/delay.h>
31#include <linux/ioport.h>
32#include <linux/kernel.h>
33#include <linux/tqueue.h>
34#include <linux/timer.h>
35#include <linux/mm.h>
36#include <linux/proc_fs.h>
37#include <linux/types.h>
38
39#include <pcmcia/cs_types.h>
40#include <pcmcia/cs.h>
41#include <pcmcia/ss.h>
42#include <pcmcia/cistpl.h>
43#include <pcmcia/bus_ops.h>
44
45#include <asm/io.h>
46#include <asm/irq.h>
47#include <asm/system.h>
48
49#include <asm/au1000.h>
50#include <asm/au1000_pcmcia.h>
51
52#define PCMCIA_MAX_SOCK 0
53#define PCMCIA_NUM_SOCKS (PCMCIA_MAX_SOCK + 1)
54#define PCMCIA_IRQ AU1000_GPIO_4
55
56#if 0
57#define DEBUG(x, args...) printk(__func__ ": " x, ##args)
58#else
59#define DEBUG(x,args...)
60#endif
61
62static int xxs1500_pcmcia_init(struct pcmcia_init *init)
63{
64 return PCMCIA_NUM_SOCKS;
65}
66
67static int xxs1500_pcmcia_shutdown(void)
68{
69 /* turn off power */
70 au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
71 GPIO2_OUTPUT);
72 au_sync_delay(100);
73
74 /* assert reset */
75 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
76 GPIO2_OUTPUT);
77 au_sync_delay(100);
78 return 0;
79}
80
81
82static int
83xxs1500_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
84{
85 u32 inserted; u32 vs;
86 unsigned long gpio, gpio2;
87
88 if(sock > PCMCIA_MAX_SOCK) return -1;
89
90 gpio = au_readl(SYS_PINSTATERD);
91 gpio2 = au_readl(GPIO2_PINSTATE);
92
93 vs = gpio2 & ((1<<8) | (1<<9));
94 inserted = (!(gpio & 0x1) && !(gpio & 0x2));
95
96 state->ready = 0;
97 state->vs_Xv = 0;
98 state->vs_3v = 0;
99 state->detect = 0;
100
101 if (inserted) {
102 switch (vs) {
103 case 0:
104 case 1:
105 case 2:
106 state->vs_3v=1;
107 break;
108 case 3: /* 5V */
109 default:
110 /* return without setting 'detect' */
111 printk(KERN_ERR "au1x00_cs: unsupported VS\n",
112 vs);
113 return;
114 }
115 state->detect = 1;
116 }
117
118 if (state->detect) {
119 state->ready = 1;
120 }
121
122 state->bvd1= gpio2 & (1<<10);
123 state->bvd2 = gpio2 & (1<<11);
124 state->wrprot=0;
125 return 1;
126}
127
128
129static int xxs1500_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
130{
131
132 if(info->sock > PCMCIA_MAX_SOCK) return -1;
133 info->irq = PCMCIA_IRQ;
134 return 0;
135}
136
137
138static int
139xxs1500_pcmcia_configure_socket(const struct pcmcia_configure *configure)
140{
141
142 if(configure->sock > PCMCIA_MAX_SOCK) return -1;
143
144 DEBUG("Vcc %dV Vpp %dV, reset %d\n",
145 configure->vcc, configure->vpp, configure->reset);
146
147 switch(configure->vcc){
148 case 33: /* Vcc 3.3V */
149 /* turn on power */
150 DEBUG("turn on power\n");
151 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30),
152 GPIO2_OUTPUT);
153 au_sync_delay(100);
154 break;
155 case 50: /* Vcc 5V */
156 default: /* what's this ? */
157 printk(KERN_ERR "au1x00_cs: unsupported VCC\n");
158 case 0: /* Vcc 0 */
159 /* turn off power */
160 au_sync_delay(100);
161 au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
162 GPIO2_OUTPUT);
163 break;
164 }
165
166 if (!configure->reset) {
167 DEBUG("deassert reset\n");
168 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<4))|(1<<20),
169 GPIO2_OUTPUT);
170 au_sync_delay(100);
171 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<5))|(1<<21),
172 GPIO2_OUTPUT);
173 }
174 else {
175 DEBUG("assert reset\n");
176 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
177 GPIO2_OUTPUT);
178 }
179 au_sync_delay(100);
180 return 0;
181}
182
183struct pcmcia_low_level xxs1500_pcmcia_ops = {
184 xxs1500_pcmcia_init,
185 xxs1500_pcmcia_shutdown,
186 xxs1500_pcmcia_socket_state,
187 xxs1500_pcmcia_get_irq_info,
188 xxs1500_pcmcia_configure_socket
189};