Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[linux-2.6] / drivers / pcmcia / pxa2xx_sharpsl.c
1 /*
2  * Sharp SL-C7xx Series PCMCIA routines
3  *
4  * Copyright (c) 2004-2005 Richard Purdie
5  *
6  * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  *
12  */
13
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/interrupt.h>
19 #include <linux/platform_device.h>
20
21 #include <asm/mach-types.h>
22 #include <asm/hardware.h>
23 #include <asm/irq.h>
24 #include <asm/hardware/scoop.h>
25
26 #include "soc_common.h"
27
28 #define NO_KEEP_VS 0x0001
29
30 /* PCMCIA to Scoop linkage
31
32    There is no easy way to link multiple scoop devices into one
33    single entity for the pxa2xx_pcmcia device so this structure
34    is used which is setup by the platform code
35 */
36 struct scoop_pcmcia_config *platform_scoop_config;
37 #define SCOOP_DEV platform_scoop_config->devs
38
39 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
40 {
41         struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
42
43         reset_scoop(scoopdev->dev);
44
45         /* Shared power controls need to be handled carefully */
46         if (platform_scoop_config->power_ctrl)
47                 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
48         else
49                 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
50
51         scoopdev->keep_vs = NO_KEEP_VS;
52         scoopdev->keep_rd = 0;
53 }
54
55 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
56 {
57         int ret;
58
59         if (platform_scoop_config->pcmcia_init)
60                 platform_scoop_config->pcmcia_init();
61
62         /* Register interrupts */
63         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
64                 struct pcmcia_irqs cd_irq;
65
66                 cd_irq.sock = skt->nr;
67                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
68                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
69                 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1);
70
71                 if (ret) {
72                         printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
73                         return ret;
74                 }
75         }
76
77         skt->irq = SCOOP_DEV[skt->nr].irq;
78
79         return 0;
80 }
81
82 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
83 {
84         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
85                 struct pcmcia_irqs cd_irq;
86
87                 cd_irq.sock = skt->nr;
88                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
89                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
90                 soc_pcmcia_free_irqs(skt, &cd_irq, 1);
91         }
92 }
93
94
95 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
96                                     struct pcmcia_state *state)
97 {
98         unsigned short cpr, csr;
99         struct device *scoop = SCOOP_DEV[skt->nr].dev;
100
101         cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
102
103         write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
104         write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
105         write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
106         csr = read_scoop_reg(scoop, SCOOP_CSR);
107         if (csr & 0x0004) {
108                 /* card eject */
109                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
110                 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
111         }
112         else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
113                 /* keep vs1,vs2 */
114                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
115                 csr |= SCOOP_DEV[skt->nr].keep_vs;
116         }
117         else if (cpr & 0x0003) {
118                 /* power on */
119                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
120                 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
121         }
122         else {
123                 /* card detect */
124                 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
125                         write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
126                 } else {
127                         write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
128                 }
129         }
130
131         state->detect = (csr & 0x0004) ? 0 : 1;
132         state->ready  = (csr & 0x0002) ? 1 : 0;
133         state->bvd1   = (csr & 0x0010) ? 1 : 0;
134         state->bvd2   = (csr & 0x0020) ? 1 : 0;
135         state->wrprot = (csr & 0x0008) ? 1 : 0;
136         state->vs_3v  = (csr & 0x0040) ? 0 : 1;
137         state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
138
139         if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
140                 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
141         }
142 }
143
144
145 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
146                                        const socket_state_t *state)
147 {
148         unsigned long flags;
149         struct device *scoop = SCOOP_DEV[skt->nr].dev;
150
151         unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
152
153         switch (state->Vcc) {
154         case    0:      break;
155         case    33:     break;
156         case    50:     break;
157         default:
158                  printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
159                  return -1;
160         }
161
162         if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
163                 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
164                 return -1;
165         }
166
167         local_irq_save(flags);
168
169         nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
170         ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
171         nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
172         nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
173
174         if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
175                 ncpr |= (state->Vcc == 33) ? 0x0002 :
176                         (state->Vcc == 50) ? 0x0002 : 0;
177         } else {
178                 ncpr |= (state->Vcc == 33) ? 0x0001 :
179                         (state->Vcc == 50) ? 0x0002 : 0;
180         }
181         nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
182         ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
183         nccr |= (state->flags&SS_RESET)? 0x0080: 0;
184         nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
185                         ((skt->status&SS_READY)  ? 0x0002 : 0)|
186                         ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
187                         ((skt->status&SS_BATWARN)? 0x0020 : 0)|
188                         ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
189                         ((skt->status&SS_WRPROT) ? 0x0008 : 0);
190
191         if (!(ncpr & 0x0003)) {
192                 SCOOP_DEV[skt->nr].keep_rd = 0;
193         } else if (!SCOOP_DEV[skt->nr].keep_rd) {
194                 if (nccr & 0x0080)
195                         SCOOP_DEV[skt->nr].keep_rd = 1;
196                 else
197                         nccr |= 0x0080;
198         }
199
200         if (mcr != nmcr)
201                 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
202         if (cpr != ncpr) {
203                 if (platform_scoop_config->power_ctrl)
204                         platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
205                 else
206                         write_scoop_reg(scoop, SCOOP_CPR, ncpr);
207         }
208         if (ccr != nccr)
209                 write_scoop_reg(scoop, SCOOP_CCR, nccr);
210         if (imr != nimr)
211                 write_scoop_reg(scoop, SCOOP_IMR, nimr);
212
213         local_irq_restore(flags);
214
215         return 0;
216 }
217
218 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
219 {
220         sharpsl_pcmcia_init_reset(skt);
221
222         /* Enable interrupt */
223         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
224         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
225         SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
226 }
227
228 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
229 {
230         sharpsl_pcmcia_init_reset(skt);
231 }
232
233 static struct pcmcia_low_level sharpsl_pcmcia_ops = {
234         .owner                  = THIS_MODULE,
235         .hw_init                = sharpsl_pcmcia_hw_init,
236         .hw_shutdown            = sharpsl_pcmcia_hw_shutdown,
237         .socket_state           = sharpsl_pcmcia_socket_state,
238         .configure_socket       = sharpsl_pcmcia_configure_socket,
239         .socket_init            = sharpsl_pcmcia_socket_init,
240         .socket_suspend         = sharpsl_pcmcia_socket_suspend,
241         .first                  = 0,
242         .nr                     = 0,
243 };
244
245 #ifdef CONFIG_SA1100_COLLIE
246 #include "sa11xx_base.h"
247
248 int __init pcmcia_collie_init(struct device *dev)
249 {
250        int ret = -ENODEV;
251
252        if (machine_is_collie())
253                ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
254
255        return ret;
256 }
257
258 #else
259
260 static struct platform_device *sharpsl_pcmcia_device;
261
262 static int __init sharpsl_pcmcia_init(void)
263 {
264         int ret;
265
266         sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
267         sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
268
269         if (!sharpsl_pcmcia_device)
270                 return -ENOMEM;
271
272         sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
273         sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
274
275         ret = platform_device_add(sharpsl_pcmcia_device);
276
277         if (ret)
278                 platform_device_put(sharpsl_pcmcia_device);
279
280         return ret;
281 }
282
283 static void __exit sharpsl_pcmcia_exit(void)
284 {
285         platform_device_unregister(sharpsl_pcmcia_device);
286 }
287
288 fs_initcall(sharpsl_pcmcia_init);
289 module_exit(sharpsl_pcmcia_exit);
290 #endif
291
292 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
293 MODULE_LICENSE("GPL");