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 <asm/mach-types.h>
25 #include <asm/irq.h>
26
27 #include <mach/pxa2xx-regs.h>
28 #include <mach/mainstone.h>
29
30 #include "soc_common.h"
31
32
33 static struct pcmcia_irqs irqs[] = {
34 { 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
35 { 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
36 { 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
37 { 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
38 };
39
mst_pcmcia_hw_init(struct soc_pcmcia_socket * skt)40 static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
41 {
42 /*
43 * Setup default state of GPIO outputs
44 * before we enable them as outputs.
45 */
46
47 skt->socket.pci_irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
48 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
49 }
50
mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)51 static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
52 {
53 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
54 }
55
56 static unsigned long mst_pcmcia_status[2];
57
mst_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)58 static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
59 struct pcmcia_state *state)
60 {
61 unsigned long status, flip;
62
63 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
64 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
65
66 /*
67 * Workaround for STSCHG which can't be deasserted:
68 * We therefore disable/enable corresponding IRQs
69 * as needed to avoid IRQ locks.
70 */
71 if (flip) {
72 mst_pcmcia_status[skt->nr] = status;
73 if (status & MST_PCMCIA_nSTSCHG_BVD1)
74 enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
75 : MAINSTONE_S1_STSCHG_IRQ );
76 else
77 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
78 : MAINSTONE_S1_STSCHG_IRQ );
79 }
80
81 state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
82 state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
83 state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
84 state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
85 state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
86 state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
87 state->wrprot = 0; /* not available */
88 }
89
mst_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)90 static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
91 const socket_state_t *state)
92 {
93 unsigned long power = 0;
94 int ret = 0;
95
96 switch (state->Vcc) {
97 case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
98 case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
99 case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
100 default:
101 printk(KERN_ERR "%s(): bad Vcc %u\n",
102 __func__, state->Vcc);
103 ret = -1;
104 }
105
106 switch (state->Vpp) {
107 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
108 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
109 default:
110 if(state->Vpp == state->Vcc) {
111 power |= MST_PCMCIA_PWR_VPP_VCC;
112 } else {
113 printk(KERN_ERR "%s(): bad Vpp %u\n",
114 __func__, state->Vpp);
115 ret = -1;
116 }
117 }
118
119 if (state->flags & SS_RESET)
120 power |= MST_PCMCIA_RESET;
121
122 switch (skt->nr) {
123 case 0: MST_PCMCIA0 = power; break;
124 case 1: MST_PCMCIA1 = power; break;
125 default: ret = -1;
126 }
127
128 return ret;
129 }
130
131 static struct pcmcia_low_level mst_pcmcia_ops __initdata = {
132 .owner = THIS_MODULE,
133 .hw_init = mst_pcmcia_hw_init,
134 .hw_shutdown = mst_pcmcia_hw_shutdown,
135 .socket_state = mst_pcmcia_socket_state,
136 .configure_socket = mst_pcmcia_configure_socket,
137 .nr = 2,
138 };
139
140 static struct platform_device *mst_pcmcia_device;
141
mst_pcmcia_init(void)142 static int __init mst_pcmcia_init(void)
143 {
144 int ret;
145
146 if (!machine_is_mainstone())
147 return -ENODEV;
148
149 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
150 if (!mst_pcmcia_device)
151 return -ENOMEM;
152
153 ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
154 sizeof(mst_pcmcia_ops));
155 if (ret == 0)
156 ret = platform_device_add(mst_pcmcia_device);
157
158 if (ret)
159 platform_device_put(mst_pcmcia_device);
160
161 return ret;
162 }
163
mst_pcmcia_exit(void)164 static void __exit mst_pcmcia_exit(void)
165 {
166 platform_device_unregister(mst_pcmcia_device);
167 }
168
169 fs_initcall(mst_pcmcia_init);
170 module_exit(mst_pcmcia_exit);
171
172 MODULE_LICENSE("GPL");
173 MODULE_ALIAS("platform:pxa2xx-pcmcia");
174