2 * linux/drivers/pcmcia/pxa2xx_mainstone.c
4 * Mainstone PCMCIA specific routines.
6 * Created: May 12, 2004
7 * Author: Nicolas Pitre
8 * Copyright: MontaVista Software Inc.
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.
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>
22 #include <pcmcia/ss.h>
24 #include <mach/hardware.h>
25 #include <asm/mach-types.h>
28 #include <mach/pxa-regs.h>
29 #include <mach/mainstone.h>
31 #include "soc_common.h"
34 static 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" },
41 static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
44 * Setup default state of GPIO outputs
45 * before we enable them as outputs.
48 skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
49 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
52 static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
54 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
57 static unsigned long mst_pcmcia_status[2];
59 static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
60 struct pcmcia_state *state)
62 unsigned long status, flip;
64 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
65 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
68 * Workaround for STSCHG which can't be deasserted:
69 * We therefore disable/enable corresponding IRQs
70 * as needed to avoid IRQ locks.
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 );
78 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
79 : MAINSTONE_S1_STSCHG_IRQ );
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 */
91 static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
92 const socket_state_t *state)
94 unsigned long power = 0;
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;
102 printk(KERN_ERR "%s(): bad Vcc %u\n",
103 __func__, state->Vcc);
107 switch (state->Vpp) {
108 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
109 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
111 if(state->Vpp == state->Vcc) {
112 power |= MST_PCMCIA_PWR_VPP_VCC;
114 printk(KERN_ERR "%s(): bad Vpp %u\n",
115 __func__, state->Vpp);
120 if (state->flags & SS_RESET)
121 power |= MST_PCMCIA_RESET;
124 case 0: MST_PCMCIA0 = power; break;
125 case 1: MST_PCMCIA1 = power; break;
132 static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
136 static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
140 static 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,
151 static struct platform_device *mst_pcmcia_device;
153 static int __init mst_pcmcia_init(void)
157 if (!machine_is_mainstone())
160 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
161 if (!mst_pcmcia_device)
164 ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
165 sizeof(mst_pcmcia_ops));
167 ret = platform_device_add(mst_pcmcia_device);
170 platform_device_put(mst_pcmcia_device);
175 static void __exit mst_pcmcia_exit(void)
177 platform_device_unregister(mst_pcmcia_device);
180 fs_initcall(mst_pcmcia_init);
181 module_exit(mst_pcmcia_exit);
183 MODULE_LICENSE("GPL");
184 MODULE_ALIAS("platform:pxa2xx-pcmcia");