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/hardware.h>
26 #include <mach/pxa-regs.h>
27 #include <mach/trizeps4.h>
28
29 #include "soc_common.h"
30
31 extern void board_pcmcia_power(int power);
32
33 static struct pcmcia_irqs irqs[] = {
34 { 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
35 /* on other baseboards we can have more inputs */
36 };
37
trizeps_pcmcia_hw_init(struct soc_pcmcia_socket * skt)38 static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
39 {
40 int ret, i;
41 /* we dont have voltage/card/ready detection
42 * so we dont need interrupts for it
43 */
44 switch (skt->nr) {
45 case 0:
46 if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
47 pr_err("%s: sock %d unable to request gpio %d\n", __func__,
48 skt->nr, GPIO_PRDY);
49 return -EBUSY;
50 }
51 if (gpio_direction_input(GPIO_PRDY) < 0) {
52 pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
53 skt->nr, GPIO_PRDY);
54 gpio_free(GPIO_PRDY);
55 return -EINVAL;
56 }
57 skt->irq = IRQ_GPIO(GPIO_PRDY);
58 break;
59
60 #ifndef CONFIG_MACH_TRIZEPS_CONXS
61 case 1:
62 #endif
63 default:
64 break;
65 }
66 /* release the reset of this card */
67 pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
68
69 /* supplementory irqs for the socket */
70 for (i = 0; i < ARRAY_SIZE(irqs); i++) {
71 if (irqs[i].sock != skt->nr)
72 continue;
73 if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
74 pr_err("%s: sock %d unable to request gpio %d\n",
75 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
76 ret = -EBUSY;
77 goto error;
78 }
79 if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
80 pr_err("%s: sock %d unable to set input gpio %d\n",
81 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
82 ret = -EINVAL;
83 goto error;
84 }
85 }
86 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
87
88 error:
89 for (; i >= 0; i--) {
90 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
91 }
92 return (ret);
93 }
94
trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)95 static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
96 {
97 int i;
98 /* free allocated gpio's */
99 gpio_free(GPIO_PRDY);
100 for (i = 0; i < ARRAY_SIZE(irqs); i++)
101 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
102 }
103
104 static unsigned long trizeps_pcmcia_status[2];
105
trizeps_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)106 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
107 struct pcmcia_state *state)
108 {
109 unsigned short status = 0, change;
110 status = CFSR_readw();
111 change = (status ^ trizeps_pcmcia_status[skt->nr]) &
112 ConXS_CFSR_BVD_MASK;
113 if (change) {
114 trizeps_pcmcia_status[skt->nr] = status;
115 if (status & ConXS_CFSR_BVD1) {
116 /* enable_irq empty */
117 } else {
118 /* disable_irq empty */
119 }
120 }
121
122 switch (skt->nr) {
123 case 0:
124 /* just fill in fix states */
125 state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
126 state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
127 state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
128 state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
129 state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
130 state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
131 state->wrprot = 0; /* not available */
132 break;
133
134 #ifndef CONFIG_MACH_TRIZEPS_CONXS
135 /* on ConXS we only have one slot. Second is inactive */
136 case 1:
137 state->detect = 0;
138 state->ready = 0;
139 state->bvd1 = 0;
140 state->bvd2 = 0;
141 state->vs_3v = 0;
142 state->vs_Xv = 0;
143 state->wrprot = 0;
144 break;
145
146 #endif
147 }
148 }
149
trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)150 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
151 const socket_state_t *state)
152 {
153 int ret = 0;
154 unsigned short power = 0;
155
156 /* we do nothing here just check a bit */
157 switch (state->Vcc) {
158 case 0: power &= 0xfc; break;
159 case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
160 case 50:
161 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
162 break;
163 default:
164 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
165 ret = -1;
166 }
167
168 switch (state->Vpp) {
169 case 0: power &= 0xf3; break;
170 case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
171 case 120:
172 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
173 break;
174 default:
175 if (state->Vpp != state->Vcc) {
176 pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
177 ret = -1;
178 }
179 }
180
181 switch (skt->nr) {
182 case 0: /* we only have 3.3V */
183 board_pcmcia_power(power);
184 break;
185
186 #ifndef CONFIG_MACH_TRIZEPS_CONXS
187 /* on ConXS we only have one slot. Second is inactive */
188 case 1:
189 #endif
190 default:
191 break;
192 }
193
194 return ret;
195 }
196
trizeps_pcmcia_socket_init(struct soc_pcmcia_socket * skt)197 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
198 {
199 /* default is on */
200 board_pcmcia_power(0x9);
201 }
202
trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)203 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
204 {
205 board_pcmcia_power(0x0);
206 }
207
208 static struct pcmcia_low_level trizeps_pcmcia_ops = {
209 .owner = THIS_MODULE,
210 .hw_init = trizeps_pcmcia_hw_init,
211 .hw_shutdown = trizeps_pcmcia_hw_shutdown,
212 .socket_state = trizeps_pcmcia_socket_state,
213 .configure_socket = trizeps_pcmcia_configure_socket,
214 .socket_init = trizeps_pcmcia_socket_init,
215 .socket_suspend = trizeps_pcmcia_socket_suspend,
216 #ifdef CONFIG_MACH_TRIZEPS_CONXS
217 .nr = 1,
218 #else
219 .nr = 2,
220 #endif
221 .first = 0,
222 };
223
224 static struct platform_device *trizeps_pcmcia_device;
225
trizeps_pcmcia_init(void)226 static int __init trizeps_pcmcia_init(void)
227 {
228 int ret;
229
230 trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
231 if (!trizeps_pcmcia_device)
232 return -ENOMEM;
233
234 ret = platform_device_add_data(trizeps_pcmcia_device,
235 &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
236
237 if (ret == 0)
238 ret = platform_device_add(trizeps_pcmcia_device);
239
240 if (ret)
241 platform_device_put(trizeps_pcmcia_device);
242
243 return ret;
244 }
245
trizeps_pcmcia_exit(void)246 static void __exit trizeps_pcmcia_exit(void)
247 {
248 platform_device_unregister(trizeps_pcmcia_device);
249 }
250
251 fs_initcall(trizeps_pcmcia_init);
252 module_exit(trizeps_pcmcia_exit);
253
254 MODULE_LICENSE("GPL");
255 MODULE_AUTHOR("Juergen Schindele");
256 MODULE_ALIAS("platform:pxa2xx-pcmcia");
257