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 scoop_pcmcia_dev *scoopdev)
  40 {
  41         reset_scoop(scoopdev->dev);
  42         scoopdev->keep_vs = NO_KEEP_VS;
  43         scoopdev->keep_rd = 0;
  44 }
  45
  46 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  47 {
  48         int ret;
  49
  50         if (platform_scoop_config->pcmcia_init)
  51                 platform_scoop_config->pcmcia_init();
  52
  53         /* Register interrupts */
  54         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
  55                 struct pcmcia_irqs cd_irq;
  56
  57                 cd_irq.sock = skt->nr;
  58                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
  59                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
  60                 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1);
  61
  62                 if (ret) {
  63                         printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
  64                         return ret;
  65                 }
  66         }
  67
  68         skt->irq = SCOOP_DEV[skt->nr].irq;
  69
  70         return 0;
  71 }
  72
  73 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  74 {
  75         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
  76                 struct pcmcia_irqs cd_irq;
  77
  78                 cd_irq.sock = skt->nr;
  79                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
  80                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
  81                 soc_pcmcia_free_irqs(skt, &cd_irq, 1);
  82         }
  83 }
  84
  85
  86 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  87                                     struct pcmcia_state *state)
  88 {
  89         unsigned short cpr, csr;
  90         struct device *scoop = SCOOP_DEV[skt->nr].dev;
  91
  92         cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
  93
  94         write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
  95         write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
  96         write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
  97         csr = read_scoop_reg(scoop, SCOOP_CSR);
  98         if (csr & 0x0004) {
  99                 /* card eject */
 100                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 101                 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 102         }
 103         else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
 104                 /* keep vs1,vs2 */
 105                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 106                 csr |= SCOOP_DEV[skt->nr].keep_vs;
 107         }
 108         else if (cpr & 0x0003) {
 109                 /* power on */
 110                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 111                 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
 112         }
 113         else {
 114                 /* card detect */
 115                 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
 116                         write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 117                 } else {
 118                         write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
 119                 }
 120         }
 121
 122         state->detect = (csr & 0x0004) ? 0 : 1;
 123         state->ready  = (csr & 0x0002) ? 1 : 0;
 124         state->bvd1   = (csr & 0x0010) ? 1 : 0;
 125         state->bvd2   = (csr & 0x0020) ? 1 : 0;
 126         state->wrprot = (csr & 0x0008) ? 1 : 0;
 127         state->vs_3v  = (csr & 0x0040) ? 0 : 1;
 128         state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
 129
 130         if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
 131                 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
 132         }
 133 }
 134
 135
 136 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 137                                        const socket_state_t *state)
 138 {
 139         unsigned long flags;
 140         struct device *scoop = SCOOP_DEV[skt->nr].dev;
 141
 142         unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
 143
 144         switch (state->Vcc) {
 145         case    0:      break;
 146         case    33:     break;
 147         case    50:     break;
 148         default:
 149                  printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
 150                  return -1;
 151         }
 152
 153         if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
 154                 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
 155                 return -1;
 156         }
 157
 158         local_irq_save(flags);
 159
 160         nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
 161         ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
 162         nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
 163         nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
 164
 165         if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
 166                 ncpr |= (state->Vcc == 33) ? 0x0002 :
 167                         (state->Vcc == 50) ? 0x0002 : 0;
 168         } else {
 169                 ncpr |= (state->Vcc == 33) ? 0x0001 :
 170                         (state->Vcc == 50) ? 0x0002 : 0;
 171         }
 172         nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
 173         ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
 174         nccr |= (state->flags&SS_RESET)? 0x0080: 0;
 175         nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
 176                         ((skt->status&SS_READY)  ? 0x0002 : 0)|
 177                         ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
 178                         ((skt->status&SS_BATWARN)? 0x0020 : 0)|
 179                         ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
 180                         ((skt->status&SS_WRPROT) ? 0x0008 : 0);
 181
 182         if (!(ncpr & 0x0003)) {
 183                 SCOOP_DEV[skt->nr].keep_rd = 0;
 184         } else if (!SCOOP_DEV[skt->nr].keep_rd) {
 185                 if (nccr & 0x0080)
 186                         SCOOP_DEV[skt->nr].keep_rd = 1;
 187                 else
 188                         nccr |= 0x0080;
 189         }
 190
 191         if (mcr != nmcr)
 192                 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
 193         if (cpr != ncpr) {
 194                 if (platform_scoop_config->power_ctrl)
 195                         platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
 196                 else
 197                         write_scoop_reg(scoop, SCOOP_CPR, ncpr);
 198         }
 199         if (ccr != nccr)
 200                 write_scoop_reg(scoop, SCOOP_CCR, nccr);
 201         if (imr != nimr)
 202                 write_scoop_reg(scoop, SCOOP_IMR, nimr);
 203
 204         local_irq_restore(flags);
 205
 206         return 0;
 207 }
 208
 209 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 210 {
 211         sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]);
 212
 213         /* Enable interrupt */
 214         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
 215         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
 216         SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 217
 218         if (machine_is_collie())
 219                 /* We need to disable SS_OUTPUT_ENA here. */
 220                 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080);
 221 }
 222
 223 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 224 {
 225         /* CF_BUS_OFF */
 226         sharpsl_pcmcia_init_reset(&SCOOP_DEV[skt->nr]);
 227
 228         if (machine_is_collie())
 229                 /* We need to disable SS_OUTPUT_ENA here. */
 230                 write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR, read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR) & ~0x0080);
 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 = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
 268         if (!sharpsl_pcmcia_device)
 269                 return -ENOMEM;
 270
 271         memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device));
 272         sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
 273         sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
 274         sharpsl_pcmcia_device->dev.parent=platform_scoop_config->devs[0].dev;
 275
 276         ret = platform_device_register(sharpsl_pcmcia_device);
 277         if (ret)
 278                 kfree(sharpsl_pcmcia_device);
 279
 280         return ret;
 281 }
 282
 283 static void __exit sharpsl_pcmcia_exit(void)
 284 {
 285         /*
 286          * This call is supposed to free our sharpsl_pcmcia_device.
 287          * Unfortunately platform_device don't have a free method, and
 288          * we can't assume it's free of any reference at this point so we
 289          * can't free it either.
 290          */
 291         platform_device_unregister(sharpsl_pcmcia_device);
 292 }
 293
 294 fs_initcall(sharpsl_pcmcia_init);
 295 module_exit(sharpsl_pcmcia_exit);
 296 #endif
 297
 298 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 299 MODULE_LICENSE("GPL");