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 { .sock = 0, .str = "cs0_cd" }
34 /* on other baseboards we can have more inputs */
35 };
36
trizeps_pcmcia_hw_init(struct soc_pcmcia_socket * skt)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->socket.pci_irq = gpio_to_irq(GPIO_PRDY);
57 irqs[0].irq = gpio_to_irq(GPIO_PCD);
58 break;
59 default:
60 break;
61 }
62 /* release the reset of this card */
63 pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
64
65 /* supplementory irqs for the socket */
66 for (i = 0; i < ARRAY_SIZE(irqs); i++) {
67 if (irqs[i].sock != skt->nr)
68 continue;
69 if (gpio_request(irq_to_gpio(irqs[i].irq), irqs[i].str) < 0) {
70 pr_err("%s: sock %d unable to request gpio %d\n",
71 __func__, skt->nr, irq_to_gpio(irqs[i].irq));
72 ret = -EBUSY;
73 goto error;
74 }
75 if (gpio_direction_input(irq_to_gpio(irqs[i].irq)) < 0) {
76 pr_err("%s: sock %d unable to set input gpio %d\n",
77 __func__, skt->nr, irq_to_gpio(irqs[i].irq));
78 ret = -EINVAL;
79 goto error;
80 }
81 }
82 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
83
84 error:
85 for (; i >= 0; i--) {
86 gpio_free(irq_to_gpio(irqs[i].irq));
87 }
88 return (ret);
89 }
90
trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)91 static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
92 {
93 int i;
94 /* free allocated gpio's */
95 gpio_free(GPIO_PRDY);
96 for (i = 0; i < ARRAY_SIZE(irqs); i++)
97 gpio_free(irq_to_gpio(irqs[i].irq));
98 }
99
100 static unsigned long trizeps_pcmcia_status[2];
101
trizeps_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)102 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
103 struct pcmcia_state *state)
104 {
105 unsigned short status = 0, change;
106 status = CFSR_readw();
107 change = (status ^ trizeps_pcmcia_status[skt->nr]) &
108 ConXS_CFSR_BVD_MASK;
109 if (change) {
110 trizeps_pcmcia_status[skt->nr] = status;
111 if (status & ConXS_CFSR_BVD1) {
112 /* enable_irq empty */
113 } else {
114 /* disable_irq empty */
115 }
116 }
117
118 switch (skt->nr) {
119 case 0:
120 /* just fill in fix states */
121 state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
122 state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
123 state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
124 state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
125 state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
126 state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
127 state->wrprot = 0; /* not available */
128 break;
129
130 #ifndef CONFIG_MACH_TRIZEPS_CONXS
131 /* on ConXS we only have one slot. Second is inactive */
132 case 1:
133 state->detect = 0;
134 state->ready = 0;
135 state->bvd1 = 0;
136 state->bvd2 = 0;
137 state->vs_3v = 0;
138 state->vs_Xv = 0;
139 state->wrprot = 0;
140 break;
141
142 #endif
143 }
144 }
145
trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)146 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
147 const socket_state_t *state)
148 {
149 int ret = 0;
150 unsigned short power = 0;
151
152 /* we do nothing here just check a bit */
153 switch (state->Vcc) {
154 case 0: power &= 0xfc; break;
155 case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
156 case 50:
157 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
158 break;
159 default:
160 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
161 ret = -1;
162 }
163
164 switch (state->Vpp) {
165 case 0: power &= 0xf3; break;
166 case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
167 case 120:
168 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
169 break;
170 default:
171 if (state->Vpp != state->Vcc) {
172 pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
173 ret = -1;
174 }
175 }
176
177 switch (skt->nr) {
178 case 0: /* we only have 3.3V */
179 board_pcmcia_power(power);
180 break;
181
182 #ifndef CONFIG_MACH_TRIZEPS_CONXS
183 /* on ConXS we only have one slot. Second is inactive */
184 case 1:
185 #endif
186 default:
187 break;
188 }
189
190 return ret;
191 }
192
trizeps_pcmcia_socket_init(struct soc_pcmcia_socket * skt)193 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
194 {
195 /* default is on */
196 board_pcmcia_power(0x9);
197 }
198
trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket * skt)199 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
200 {
201 board_pcmcia_power(0x0);
202 }
203
204 static struct pcmcia_low_level trizeps_pcmcia_ops = {
205 .owner = THIS_MODULE,
206 .hw_init = trizeps_pcmcia_hw_init,
207 .hw_shutdown = trizeps_pcmcia_hw_shutdown,
208 .socket_state = trizeps_pcmcia_socket_state,
209 .configure_socket = trizeps_pcmcia_configure_socket,
210 .socket_init = trizeps_pcmcia_socket_init,
211 .socket_suspend = trizeps_pcmcia_socket_suspend,
212 #ifdef CONFIG_MACH_TRIZEPS_CONXS
213 .nr = 1,
214 #else
215 .nr = 2,
216 #endif
217 .first = 0,
218 };
219
220 static struct platform_device *trizeps_pcmcia_device;
221
trizeps_pcmcia_init(void)222 static int __init trizeps_pcmcia_init(void)
223 {
224 int ret;
225
226 if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
227 return -ENODEV;
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
trizeps_pcmcia_exit(void)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