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 = kzalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
 268         if (!sharpsl_pcmcia_device)
 269                 return -ENOMEM;
 270
 271         sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
 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_register(sharpsl_pcmcia_device);
 276         if (ret)
 277                 kfree(sharpsl_pcmcia_device);
 278
 279         return ret;
 280 }
 281
 282 static void __exit sharpsl_pcmcia_exit(void)
 283 {
 284         /*
 285          * This call is supposed to free our sharpsl_pcmcia_device.
 286          * Unfortunately platform_device don't have a free method, and
 287          * we can't assume it's free of any reference at this point so we
 288          * can't free it either.
 289          */
 290         platform_device_unregister(sharpsl_pcmcia_device);
 291 }
 292
 293 fs_initcall(sharpsl_pcmcia_init);
 294 module_exit(sharpsl_pcmcia_exit);
 295 #endif
 296
 297 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 298 MODULE_LICENSE("GPL");