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 <asm/hardware.h>
27 #include <asm/arch/pxa-regs.h>
28 #include <asm/arch/mainstone.h>
30 #include "soc_common.h"
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" },
40 static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
43 * Setup default state of GPIO outputs
44 * before we enable them as outputs.
47 skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
48 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
51 static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
53 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
56 static unsigned long mst_pcmcia_status[2];
58 static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
59 struct pcmcia_state *state)
61 unsigned long status, flip;
63 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
64 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
67 * Workaround for STSCHG which can't be deasserted:
68 * We therefore disable/enable corresponding IRQs
69 * as needed to avoid IRQ locks.
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 );
77 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
78 : MAINSTONE_S1_STSCHG_IRQ );
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 */
90 static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
91 const socket_state_t *state)
93 unsigned long power = 0;
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;
101 printk(KERN_ERR "%s(): bad Vcc %u\n",
102 __FUNCTION__, state->Vcc);
106 switch (state->Vpp) {
107 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
108 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
110 if(state->Vpp == state->Vcc) {
111 power |= MST_PCMCIA_PWR_VPP_VCC;
113 printk(KERN_ERR "%s(): bad Vpp %u\n",
114 __FUNCTION__, state->Vpp);
119 if (state->flags & SS_RESET)
120 power |= MST_PCMCIA_RESET;
123 case 0: MST_PCMCIA0 = power; break;
124 case 1: MST_PCMCIA1 = power; break;
131 static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
135 static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
139 static struct pcmcia_low_level mst_pcmcia_ops = {
140 .owner = THIS_MODULE,
141 .hw_init = mst_pcmcia_hw_init,
142 .hw_shutdown = mst_pcmcia_hw_shutdown,
143 .socket_state = mst_pcmcia_socket_state,
144 .configure_socket = mst_pcmcia_configure_socket,
145 .socket_init = mst_pcmcia_socket_init,
146 .socket_suspend = mst_pcmcia_socket_suspend,
150 static struct platform_device *mst_pcmcia_device;
152 static int __init mst_pcmcia_init(void)
156 mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
157 if (!mst_pcmcia_device)
160 mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
162 ret = platform_device_add(mst_pcmcia_device);
165 platform_device_put(mst_pcmcia_device);
170 static void __exit mst_pcmcia_exit(void)
172 platform_device_unregister(mst_pcmcia_device);
175 fs_initcall(mst_pcmcia_init);
176 module_exit(mst_pcmcia_exit);
178 MODULE_LICENSE("GPL");
179 MODULE_ALIAS("platform:pxa2xx-pcmcia");