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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/device.h>
21
22#include <pcmcia/ss.h>
23
24#include <asm/hardware.h>
25#include <asm/irq.h>
26
27#include <asm/arch/pxa-regs.h>
28#include <asm/arch/mainstone.h>
29
30#include "soc_common.h"
31
32
33static 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
40static 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 GPSR(GPIO48_nPOE) =
47 GPIO_bit(GPIO48_nPOE) |
48 GPIO_bit(GPIO49_nPWE) |
49 GPIO_bit(GPIO50_nPIOR) |
50 GPIO_bit(GPIO51_nPIOW) |
51 GPIO_bit(GPIO85_nPCE_1) |
52 GPIO_bit(GPIO54_nPCE_2);
53
54 pxa_gpio_mode(GPIO48_nPOE_MD);
55 pxa_gpio_mode(GPIO49_nPWE_MD);
56 pxa_gpio_mode(GPIO50_nPIOR_MD);
57 pxa_gpio_mode(GPIO51_nPIOW_MD);
58 pxa_gpio_mode(GPIO85_nPCE_1_MD);
59 pxa_gpio_mode(GPIO54_nPCE_2_MD);
60 pxa_gpio_mode(GPIO79_pSKTSEL_MD);
61 pxa_gpio_mode(GPIO55_nPREG_MD);
62 pxa_gpio_mode(GPIO56_nPWAIT_MD);
63 pxa_gpio_mode(GPIO57_nIOIS16_MD);
64
65 skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
66 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
67}
68
69static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
70{
71 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
72}
73
74static unsigned long mst_pcmcia_status[2];
75
76static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
77 struct pcmcia_state *state)
78{
79 unsigned long status, flip;
80
81 status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
82 flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
83
84 /*
85 * Workaround for STSCHG which can't be deasserted:
86 * We therefore disable/enable corresponding IRQs
87 * as needed to avoid IRQ locks.
88 */
89 if (flip) {
90 mst_pcmcia_status[skt->nr] = status;
91 if (status & MST_PCMCIA_nSTSCHG_BVD1)
92 enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
93 : MAINSTONE_S1_STSCHG_IRQ );
94 else
95 disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
96 : MAINSTONE_S1_STSCHG_IRQ );
97 }
98
99 state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
100 state->ready = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
101 state->bvd1 = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
102 state->bvd2 = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
103 state->vs_3v = (status & MST_PCMCIA_nVS1) ? 0 : 1;
104 state->vs_Xv = (status & MST_PCMCIA_nVS2) ? 0 : 1;
105 state->wrprot = 0; /* not available */
106}
107
108static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
109 const socket_state_t *state)
110{
111 unsigned long power = 0;
112 int ret = 0;
113
114 switch (state->Vcc) {
115 case 0: power |= MST_PCMCIA_PWR_VCC_0; break;
116 case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
117 case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
118 default:
119 printk(KERN_ERR "%s(): bad Vcc %u\n",
120 __FUNCTION__, state->Vcc);
121 ret = -1;
122 }
123
124 switch (state->Vpp) {
125 case 0: power |= MST_PCMCIA_PWR_VPP_0; break;
126 case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
127 default:
128 if(state->Vpp == state->Vcc) {
129 power |= MST_PCMCIA_PWR_VPP_VCC;
130 } else {
131 printk(KERN_ERR "%s(): bad Vpp %u\n",
132 __FUNCTION__, state->Vpp);
133 ret = -1;
134 }
135 }
136
137 if (state->flags & SS_RESET)
138 power |= MST_PCMCIA_RESET;
139
140 switch (skt->nr) {
141 case 0: MST_PCMCIA0 = power; break;
142 case 1: MST_PCMCIA1 = power; break;
143 default: ret = -1;
144 }
145
146 return ret;
147}
148
149static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
150{
151}
152
153static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
154{
155}
156
157static struct pcmcia_low_level mst_pcmcia_ops = {
158 .owner = THIS_MODULE,
159 .hw_init = mst_pcmcia_hw_init,
160 .hw_shutdown = mst_pcmcia_hw_shutdown,
161 .socket_state = mst_pcmcia_socket_state,
162 .configure_socket = mst_pcmcia_configure_socket,
163 .socket_init = mst_pcmcia_socket_init,
164 .socket_suspend = mst_pcmcia_socket_suspend,
165 .nr = 2,
166};
167
168static struct platform_device *mst_pcmcia_device;
169
170static int __init mst_pcmcia_init(void)
171{
172 int ret;
173
174 mst_pcmcia_device = kmalloc(sizeof(*mst_pcmcia_device), GFP_KERNEL);
175 if (!mst_pcmcia_device)
176 return -ENOMEM;
177 memset(mst_pcmcia_device, 0, sizeof(*mst_pcmcia_device));
178 mst_pcmcia_device->name = "pxa2xx-pcmcia";
179 mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
180
181 ret = platform_device_register(mst_pcmcia_device);
182 if (ret)
183 kfree(mst_pcmcia_device);
184
185 return ret;
186}
187
188static void __exit mst_pcmcia_exit(void)
189{
190 /*
191 * This call is supposed to free our mst_pcmcia_device.
192 * Unfortunately platform_device don't have a free method, and
193 * we can't assume it's free of any reference at this point so we
194 * can't free it either.
195 */
196 platform_device_unregister(mst_pcmcia_device);
197}
198
199module_init(mst_pcmcia_init);
200module_exit(mst_pcmcia_exit);
201
202MODULE_LICENSE("GPL");