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1da177e4 LT |
1 | /* |
2 | * | |
3 | * Alchemy Semi Db1x00 boards specific pcmcia routines. | |
4 | * | |
5 | * Copyright 2002 MontaVista Software Inc. | |
6 | * Author: MontaVista Software, Inc. | |
7 | * ppopov@mvista.com or source@mvista.com | |
8 | * | |
9 | * Copyright 2004 Pete Popov, updated the driver to 2.6. | |
10 | * Followed the sa11xx API and largely copied many of the hardware | |
11 | * independent functions. | |
12 | * | |
13 | * ######################################################################## | |
14 | * | |
15 | * This program is free software; you can distribute it and/or modify it | |
16 | * under the terms of the GNU General Public License (Version 2) as | |
17 | * published by the Free Software Foundation. | |
18 | * | |
19 | * This program is distributed in the hope it will be useful, but WITHOUT | |
20 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
21 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
22 | * for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License along | |
25 | * with this program; if not, write to the Free Software Foundation, Inc., | |
26 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
27 | * | |
28 | * ######################################################################## | |
29 | * | |
30 | * | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/errno.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/device.h> | |
38 | #include <linux/init.h> | |
39 | ||
40 | #include <asm/irq.h> | |
41 | #include <asm/signal.h> | |
42 | #include <asm/mach-au1x00/au1000.h> | |
43 | #include <asm/mach-db1x00/db1x00.h> | |
44 | ||
45 | #include "au1000_generic.h" | |
46 | ||
47 | #if 0 | |
48 | #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args) | |
49 | #else | |
50 | #define debug(x,args...) | |
51 | #endif | |
52 | ||
53 | static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR; | |
54 | ||
55 | struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS]; | |
56 | extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int); | |
57 | ||
58 | static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt) | |
59 | { | |
60 | #ifdef CONFIG_MIPS_DB1550 | |
61 | skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3; | |
62 | #else | |
63 | skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2; | |
64 | #endif | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt) | |
69 | { | |
70 | bcsr->pcmcia = 0; /* turn off power */ | |
71 | au_sync_delay(2); | |
72 | } | |
73 | ||
74 | static void | |
75 | db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state) | |
76 | { | |
77 | u32 inserted; | |
78 | unsigned char vs; | |
79 | ||
80 | state->ready = 0; | |
81 | state->vs_Xv = 0; | |
82 | state->vs_3v = 0; | |
83 | state->detect = 0; | |
84 | ||
85 | switch (skt->nr) { | |
86 | case 0: | |
87 | vs = bcsr->status & 0x3; | |
88 | inserted = !(bcsr->status & (1<<4)); | |
89 | break; | |
90 | case 1: | |
91 | vs = (bcsr->status & 0xC)>>2; | |
92 | inserted = !(bcsr->status & (1<<5)); | |
93 | break; | |
94 | default:/* should never happen */ | |
95 | return; | |
96 | } | |
97 | ||
98 | if (inserted) | |
99 | debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n", | |
100 | skt->nr, inserted, vs, bcsr->pcmcia); | |
101 | ||
102 | if (inserted) { | |
103 | switch (vs) { | |
104 | case 0: | |
105 | case 2: | |
106 | state->vs_3v=1; | |
107 | break; | |
108 | case 3: /* 5V */ | |
109 | break; | |
110 | default: | |
111 | /* return without setting 'detect' */ | |
112 | printk(KERN_ERR "db1x00 bad VS (%d)\n", | |
113 | vs); | |
114 | } | |
115 | state->detect = 1; | |
116 | state->ready = 1; | |
117 | } | |
118 | else { | |
119 | /* if the card was previously inserted and then ejected, | |
120 | * we should turn off power to it | |
121 | */ | |
122 | if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) { | |
123 | bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST | | |
124 | BCSR_PCMCIA_PC0DRVEN | | |
125 | BCSR_PCMCIA_PC0VPP | | |
126 | BCSR_PCMCIA_PC0VCC); | |
127 | au_sync_delay(10); | |
128 | } | |
129 | else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) { | |
130 | bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST | | |
131 | BCSR_PCMCIA_PC1DRVEN | | |
132 | BCSR_PCMCIA_PC1VPP | | |
133 | BCSR_PCMCIA_PC1VCC); | |
134 | au_sync_delay(10); | |
135 | } | |
136 | } | |
137 | ||
138 | state->bvd1=1; | |
139 | state->bvd2=1; | |
140 | state->wrprot=0; | |
141 | } | |
142 | ||
143 | static int | |
144 | db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state) | |
145 | { | |
146 | u16 pwr; | |
147 | int sock = skt->nr; | |
148 | ||
149 | debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n", | |
150 | sock, state->Vcc, state->Vpp, | |
151 | state->flags & SS_RESET); | |
152 | ||
153 | /* pcmcia reg was set to zero at init time. Be careful when | |
154 | * initializing a socket not to wipe out the settings of the | |
155 | * other socket. | |
156 | */ | |
157 | pwr = bcsr->pcmcia; | |
158 | pwr &= ~(0xf << sock*8); /* clear voltage settings */ | |
159 | ||
160 | state->Vpp = 0; | |
161 | switch(state->Vcc){ | |
162 | case 0: /* Vcc 0 */ | |
163 | pwr |= SET_VCC_VPP(0,0,sock); | |
164 | break; | |
165 | case 50: /* Vcc 5V */ | |
166 | switch(state->Vpp) { | |
167 | case 0: | |
168 | pwr |= SET_VCC_VPP(2,0,sock); | |
169 | break; | |
170 | case 50: | |
171 | pwr |= SET_VCC_VPP(2,1,sock); | |
172 | break; | |
173 | case 12: | |
174 | pwr |= SET_VCC_VPP(2,2,sock); | |
175 | break; | |
176 | case 33: | |
177 | default: | |
178 | pwr |= SET_VCC_VPP(0,0,sock); | |
179 | printk("%s: bad Vcc/Vpp (%d:%d)\n", | |
180 | __FUNCTION__, | |
181 | state->Vcc, | |
182 | state->Vpp); | |
183 | break; | |
184 | } | |
185 | break; | |
186 | case 33: /* Vcc 3.3V */ | |
187 | switch(state->Vpp) { | |
188 | case 0: | |
189 | pwr |= SET_VCC_VPP(1,0,sock); | |
190 | break; | |
191 | case 12: | |
192 | pwr |= SET_VCC_VPP(1,2,sock); | |
193 | break; | |
194 | case 33: | |
195 | pwr |= SET_VCC_VPP(1,1,sock); | |
196 | break; | |
197 | case 50: | |
198 | default: | |
199 | pwr |= SET_VCC_VPP(0,0,sock); | |
200 | printk("%s: bad Vcc/Vpp (%d:%d)\n", | |
201 | __FUNCTION__, | |
202 | state->Vcc, | |
203 | state->Vpp); | |
204 | break; | |
205 | } | |
206 | break; | |
207 | default: /* what's this ? */ | |
208 | pwr |= SET_VCC_VPP(0,0,sock); | |
209 | printk(KERN_ERR "%s: bad Vcc %d\n", | |
210 | __FUNCTION__, state->Vcc); | |
211 | break; | |
212 | } | |
213 | ||
214 | bcsr->pcmcia = pwr; | |
215 | au_sync_delay(300); | |
216 | ||
217 | if (sock == 0) { | |
218 | if (!(state->flags & SS_RESET)) { | |
219 | pwr |= BCSR_PCMCIA_PC0DRVEN; | |
220 | bcsr->pcmcia = pwr; | |
221 | au_sync_delay(300); | |
222 | pwr |= BCSR_PCMCIA_PC0RST; | |
223 | bcsr->pcmcia = pwr; | |
224 | au_sync_delay(100); | |
225 | } | |
226 | else { | |
227 | pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN); | |
228 | bcsr->pcmcia = pwr; | |
229 | au_sync_delay(100); | |
230 | } | |
231 | } | |
232 | else { | |
233 | if (!(state->flags & SS_RESET)) { | |
234 | pwr |= BCSR_PCMCIA_PC1DRVEN; | |
235 | bcsr->pcmcia = pwr; | |
236 | au_sync_delay(300); | |
237 | pwr |= BCSR_PCMCIA_PC1RST; | |
238 | bcsr->pcmcia = pwr; | |
239 | au_sync_delay(100); | |
240 | } | |
241 | else { | |
242 | pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN); | |
243 | bcsr->pcmcia = pwr; | |
244 | au_sync_delay(100); | |
245 | } | |
246 | } | |
247 | return 0; | |
248 | } | |
249 | ||
250 | /* | |
251 | * Enable card status IRQs on (re-)initialisation. This can | |
252 | * be called at initialisation, power management event, or | |
253 | * pcmcia event. | |
254 | */ | |
255 | void db1x00_socket_init(struct au1000_pcmcia_socket *skt) | |
256 | { | |
257 | /* nothing to do for now */ | |
258 | } | |
259 | ||
260 | /* | |
261 | * Disable card status IRQs and PCMCIA bus on suspend. | |
262 | */ | |
263 | void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt) | |
264 | { | |
265 | /* nothing to do for now */ | |
266 | } | |
267 | ||
268 | struct pcmcia_low_level db1x00_pcmcia_ops = { | |
269 | .owner = THIS_MODULE, | |
270 | ||
271 | .hw_init = db1x00_pcmcia_hw_init, | |
272 | .hw_shutdown = db1x00_pcmcia_shutdown, | |
273 | ||
274 | .socket_state = db1x00_pcmcia_socket_state, | |
275 | .configure_socket = db1x00_pcmcia_configure_socket, | |
276 | ||
277 | .socket_init = db1x00_socket_init, | |
278 | .socket_suspend = db1x00_socket_suspend | |
279 | }; | |
280 | ||
281 | int __init au1x_board_init(struct device *dev) | |
282 | { | |
283 | int ret = -ENODEV; | |
284 | bcsr->pcmcia = 0; /* turn off power, if it's not already off */ | |
285 | au_sync_delay(2); | |
286 | ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2); | |
287 | return ret; | |
288 | } |