1 /*
2 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
3 *
4 * TRIZEPS PCMCIA specific routines.
5 *
6 * Author: Jürgen Schindele
7 * Created: 20 02, 2006
8 * Copyright: Jürgen Schindele
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/gpio.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21
22 #include <asm/mach-types.h>
23 #include <asm/irq.h>
24
25 #include <mach/pxa2xx-regs.h>
26 #include <mach/trizeps4.h>
27
28 #include "soc_common.h"
29
30 extern void board_pcmcia_power(int power);
31
32 static struct pcmcia_irqs irqs[] = {
33 { 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
34 /* on other baseboards we can have more inputs */
35 };
36
37 static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
38 {
39 int ret, i;
40 /* we dont have voltage/card/ready detection
41 * so we dont need interrupts for it
42 */
43 switch (skt->nr) {
44 case 0:
45 if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
46 pr_err("%s: sock %d unable to request gpio %d\n", __func__,
47 skt->nr, GPIO_PRDY);
48 return -EBUSY;
49 }
50 if (gpio_direction_input(GPIO_PRDY) < 0) {
51 pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
52 skt->nr, GPIO_PRDY);
53 gpio_free(GPIO_PRDY);
54 return -EINVAL;
55 }
56 skt->irq = IRQ_GPIO(GPIO_PRDY);
57 break;
58
59 #ifndef CONFIG_MACH_TRIZEPS_CONXS
60 case 1:
61 #endif
62 default:
63 break;
64 }
65 /* release the reset of this card */
66 pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
67
68 /* supplementory irqs for the socket */
69 for (i = 0; i < ARRAY_SIZE(irqs); i++) {
70 if (irqs[i].sock != skt->nr)
71 continue;
72 if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
73 pr_err("%s: sock %d unable to request gpio %d\n",
74 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
75 ret = -EBUSY;
76 goto error;
77 }
78 if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
79 pr_err("%s: sock %d unable to set input gpio %d\n",
80 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
81 ret = -EINVAL;
82 goto error;
83 }
84 }
85 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
86
87 error:
88 for (; i >= 0; i--) {
89 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
90 }
91 return (ret);
92 }
93
94 static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
95 {
96 int i;
97 /* free allocated gpio's */
98 gpio_free(GPIO_PRDY);
99 for (i = 0; i < ARRAY_SIZE(irqs); i++)
100 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
101 }
102
103 static unsigned long trizeps_pcmcia_status[2];
104
105 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
106 struct pcmcia_state *state)
107 {
108 unsigned short status = 0, change;
109 status = CFSR_readw();
110 change = (status ^ trizeps_pcmcia_status[skt->nr]) &
111 ConXS_CFSR_BVD_MASK;
112 if (change) {
113 trizeps_pcmcia_status[skt->nr] = status;
114 if (status & ConXS_CFSR_BVD1) {
115 /* enable_irq empty */
116 } else {
117 /* disable_irq empty */
118 }
119 }
120
121 switch (skt->nr) {
122 case 0:
123 /* just fill in fix states */
124 state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
125 state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
126 state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
127 state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
128 state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
129 state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
130 state->wrprot = 0; /* not available */
131 break;
132
133 #ifndef CONFIG_MACH_TRIZEPS_CONXS
134 /* on ConXS we only have one slot. Second is inactive */
135 case 1:
136 state->detect = 0;
137 state->ready = 0;
138 state->bvd1 = 0;
139 state->bvd2 = 0;
140 state->vs_3v = 0;
141 state->vs_Xv = 0;
142 state->wrprot = 0;
143 break;
144
145 #endif
146 }
147 }
148
149 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
150 const socket_state_t *state)
151 {
152 int ret = 0;
153 unsigned short power = 0;
154
155 /* we do nothing here just check a bit */
156 switch (state->Vcc) {
157 case 0: power &= 0xfc; break;
158 case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
159 case 50:
160 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
161 break;
162 default:
163 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
164 ret = -1;
165 }
166
167 switch (state->Vpp) {
168 case 0: power &= 0xf3; break;
169 case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
170 case 120:
171 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
172 break;
173 default:
174 if (state->Vpp != state->Vcc) {
175 pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
176 ret = -1;
177 }
178 }
179
180 switch (skt->nr) {
181 case 0: /* we only have 3.3V */
182 board_pcmcia_power(power);
183 break;
184
185 #ifndef CONFIG_MACH_TRIZEPS_CONXS
186 /* on ConXS we only have one slot. Second is inactive */
187 case 1:
188 #endif
189 default:
190 break;
191 }
192
193 return ret;
194 }
195
196 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
197 {
198 /* default is on */
199 board_pcmcia_power(0x9);
200 }
201
202 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
203 {
204 board_pcmcia_power(0x0);
205 }
206
207 static struct pcmcia_low_level trizeps_pcmcia_ops = {
208 .owner = THIS_MODULE,
209 .hw_init = trizeps_pcmcia_hw_init,
210 .hw_shutdown = trizeps_pcmcia_hw_shutdown,
211 .socket_state = trizeps_pcmcia_socket_state,
212 .configure_socket = trizeps_pcmcia_configure_socket,
213 .socket_init = trizeps_pcmcia_socket_init,
214 .socket_suspend = trizeps_pcmcia_socket_suspend,
215 #ifdef CONFIG_MACH_TRIZEPS_CONXS
216 .nr = 1,
217 #else
218 .nr = 2,
219 #endif
220 .first = 0,
221 };
222
223 static struct platform_device *trizeps_pcmcia_device;
224
225 static int __init trizeps_pcmcia_init(void)
226 {
227 int ret;
228
229 trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
230 if (!trizeps_pcmcia_device)
231 return -ENOMEM;
232
233 ret = platform_device_add_data(trizeps_pcmcia_device,
234 &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
235
236 if (ret == 0)
237 ret = platform_device_add(trizeps_pcmcia_device);
238
239 if (ret)
240 platform_device_put(trizeps_pcmcia_device);
241
242 return ret;
243 }
244
245 static void __exit trizeps_pcmcia_exit(void)
246 {
247 platform_device_unregister(trizeps_pcmcia_device);
248 }
249
250 fs_initcall(trizeps_pcmcia_init);
251 module_exit(trizeps_pcmcia_exit);
252
253 MODULE_LICENSE("GPL");
254 MODULE_AUTHOR("Juergen Schindele");
255 MODULE_ALIAS("platform:pxa2xx-pcmcia");
256
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