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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 int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
33 | { |
34 | /* we dont have voltage/card/ready detection |
35 | * so we dont need interrupts for it |
36 | */ |
37 | switch (skt->nr) { |
38 | case 0: |
39 | skt->stat[SOC_STAT_CD].gpio = GPIO_PCD; |
40 | skt->stat[SOC_STAT_CD].name = "cs0_cd"; |
41 | skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY; |
42 | skt->stat[SOC_STAT_RDY].name = "cs0_rdy"; |
43 | break; |
44 | default: |
45 | break; |
46 | } |
47 | /* release the reset of this card */ |
48 | pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq); |
49 | |
50 | return 0; |
51 | } |
52 | |
53 | static unsigned long trizeps_pcmcia_status[2]; |
54 | |
55 | static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt, |
56 | struct pcmcia_state *state) |
57 | { |
58 | unsigned short status = 0, change; |
59 | status = CFSR_readw(); |
60 | change = (status ^ trizeps_pcmcia_status[skt->nr]) & |
61 | ConXS_CFSR_BVD_MASK; |
62 | if (change) { |
63 | trizeps_pcmcia_status[skt->nr] = status; |
64 | if (status & ConXS_CFSR_BVD1) { |
65 | /* enable_irq empty */ |
66 | } else { |
67 | /* disable_irq empty */ |
68 | } |
69 | } |
70 | |
71 | switch (skt->nr) { |
72 | case 0: |
73 | /* just fill in fix states */ |
74 | state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0; |
75 | state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0; |
76 | state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1; |
77 | state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1; |
78 | break; |
79 | |
80 | #ifndef CONFIG_MACH_TRIZEPS_CONXS |
81 | /* on ConXS we only have one slot. Second is inactive */ |
82 | case 1: |
83 | state->detect = 0; |
84 | state->ready = 0; |
85 | state->bvd1 = 0; |
86 | state->bvd2 = 0; |
87 | state->vs_3v = 0; |
88 | state->vs_Xv = 0; |
89 | break; |
90 | |
91 | #endif |
92 | } |
93 | } |
94 | |
95 | static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, |
96 | const socket_state_t *state) |
97 | { |
98 | int ret = 0; |
99 | unsigned short power = 0; |
100 | |
101 | /* we do nothing here just check a bit */ |
102 | switch (state->Vcc) { |
103 | case 0: power &= 0xfc; break; |
104 | case 33: power |= ConXS_BCR_S0_VCC_3V3; break; |
105 | case 50: |
106 | pr_err("%s(): Vcc 5V not supported in socket\n", __func__); |
107 | break; |
108 | default: |
109 | pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc); |
110 | ret = -1; |
111 | } |
112 | |
113 | switch (state->Vpp) { |
114 | case 0: power &= 0xf3; break; |
115 | case 33: power |= ConXS_BCR_S0_VPP_3V3; break; |
116 | case 120: |
117 | pr_err("%s(): Vpp 12V not supported in socket\n", __func__); |
118 | break; |
119 | default: |
120 | if (state->Vpp != state->Vcc) { |
121 | pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp); |
122 | ret = -1; |
123 | } |
124 | } |
125 | |
126 | switch (skt->nr) { |
127 | case 0: /* we only have 3.3V */ |
128 | board_pcmcia_power(power); |
129 | break; |
130 | |
131 | #ifndef CONFIG_MACH_TRIZEPS_CONXS |
132 | /* on ConXS we only have one slot. Second is inactive */ |
133 | case 1: |
134 | #endif |
135 | default: |
136 | break; |
137 | } |
138 | |
139 | return ret; |
140 | } |
141 | |
142 | static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt) |
143 | { |
144 | /* default is on */ |
145 | board_pcmcia_power(0x9); |
146 | } |
147 | |
148 | static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) |
149 | { |
150 | board_pcmcia_power(0x0); |
151 | } |
152 | |
153 | static struct pcmcia_low_level trizeps_pcmcia_ops = { |
154 | .owner = THIS_MODULE, |
155 | .hw_init = trizeps_pcmcia_hw_init, |
156 | .socket_state = trizeps_pcmcia_socket_state, |
157 | .configure_socket = trizeps_pcmcia_configure_socket, |
158 | .socket_init = trizeps_pcmcia_socket_init, |
159 | .socket_suspend = trizeps_pcmcia_socket_suspend, |
160 | #ifdef CONFIG_MACH_TRIZEPS_CONXS |
161 | .nr = 1, |
162 | #else |
163 | .nr = 2, |
164 | #endif |
165 | .first = 0, |
166 | }; |
167 | |
168 | static struct platform_device *trizeps_pcmcia_device; |
169 | |
170 | static int __init trizeps_pcmcia_init(void) |
171 | { |
172 | int ret; |
173 | |
174 | if (!machine_is_trizeps4() && !machine_is_trizeps4wl()) |
175 | return -ENODEV; |
176 | |
177 | trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); |
178 | if (!trizeps_pcmcia_device) |
179 | return -ENOMEM; |
180 | |
181 | ret = platform_device_add_data(trizeps_pcmcia_device, |
182 | &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops)); |
183 | |
184 | if (ret == 0) |
185 | ret = platform_device_add(trizeps_pcmcia_device); |
186 | |
187 | if (ret) |
188 | platform_device_put(trizeps_pcmcia_device); |
189 | |
190 | return ret; |
191 | } |
192 | |
193 | static void __exit trizeps_pcmcia_exit(void) |
194 | { |
195 | platform_device_unregister(trizeps_pcmcia_device); |
196 | } |
197 | |
198 | fs_initcall(trizeps_pcmcia_init); |
199 | module_exit(trizeps_pcmcia_exit); |
200 | |
201 | MODULE_LICENSE("GPL"); |
202 | MODULE_AUTHOR("Juergen Schindele"); |
203 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); |
204 |
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