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 <mach/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 #define SCOOP_DEV platform_scoop_config->devs
  30
  31 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
  32 {
  33         struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
  34
  35         reset_scoop(scoopdev->dev);
  36
  37         /* Shared power controls need to be handled carefully */
  38         if (platform_scoop_config->power_ctrl)
  39                 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
  40         else
  41                 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
  42
  43         scoopdev->keep_vs = NO_KEEP_VS;
  44         scoopdev->keep_rd = 0;
  45 }
  46
  47 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  48 {
  49         int ret;
  50
  51         if (platform_scoop_config->pcmcia_init)
  52                 platform_scoop_config->pcmcia_init();
  53
  54         /* Register interrupts */
  55         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
  56                 struct pcmcia_irqs cd_irq;
  57
  58                 cd_irq.sock = skt->nr;
  59                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
  60                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
  61                 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1);
  62
  63                 if (ret) {
  64                         printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
  65                         return ret;
  66                 }
  67         }
  68
  69         skt->irq = SCOOP_DEV[skt->nr].irq;
  70
  71         return 0;
  72 }
  73
  74 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  75 {
  76         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
  77                 struct pcmcia_irqs cd_irq;
  78
  79                 cd_irq.sock = skt->nr;
  80                 cd_irq.irq  = SCOOP_DEV[skt->nr].cd_irq;
  81                 cd_irq.str  = SCOOP_DEV[skt->nr].cd_irq_str;
  82                 soc_pcmcia_free_irqs(skt, &cd_irq, 1);
  83         }
  84 }
  85
  86
  87 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  88                                     struct pcmcia_state *state)
  89 {
  90         unsigned short cpr, csr;
  91         struct device *scoop = SCOOP_DEV[skt->nr].dev;
  92
  93         cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
  94
  95         write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
  96         write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
  97         write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
  98         csr = read_scoop_reg(scoop, SCOOP_CSR);
  99         if (csr & 0x0004) {
 100                 /* card eject */
 101                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 102                 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 103         }
 104         else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
 105                 /* keep vs1,vs2 */
 106                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 107                 csr |= SCOOP_DEV[skt->nr].keep_vs;
 108         }
 109         else if (cpr & 0x0003) {
 110                 /* power on */
 111                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 112                 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
 113         }
 114         else {
 115                 /* card detect */
 116                 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
 117                         write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
 118                 } else {
 119                         write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
 120                 }
 121         }
 122
 123         state->detect = (csr & 0x0004) ? 0 : 1;
 124         state->ready  = (csr & 0x0002) ? 1 : 0;
 125         state->bvd1   = (csr & 0x0010) ? 1 : 0;
 126         state->bvd2   = (csr & 0x0020) ? 1 : 0;
 127         state->wrprot = (csr & 0x0008) ? 1 : 0;
 128         state->vs_3v  = (csr & 0x0040) ? 0 : 1;
 129         state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
 130
 131         if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
 132                 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
 133         }
 134 }
 135
 136
 137 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 138                                        const socket_state_t *state)
 139 {
 140         unsigned long flags;
 141         struct device *scoop = SCOOP_DEV[skt->nr].dev;
 142
 143         unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
 144
 145         switch (state->Vcc) {
 146         case    0:      break;
 147         case    33:     break;
 148         case    50:     break;
 149         default:
 150                  printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
 151                  return -1;
 152         }
 153
 154         if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
 155                 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
 156                 return -1;
 157         }
 158
 159         local_irq_save(flags);
 160
 161         nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
 162         ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
 163         nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
 164         nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
 165
 166         if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
 167                 ncpr |= (state->Vcc == 33) ? 0x0002 :
 168                         (state->Vcc == 50) ? 0x0002 : 0;
 169         } else {
 170                 ncpr |= (state->Vcc == 33) ? 0x0001 :
 171                         (state->Vcc == 50) ? 0x0002 : 0;
 172         }
 173         nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
 174         ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
 175         nccr |= (state->flags&SS_RESET)? 0x0080: 0;
 176         nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
 177                         ((skt->status&SS_READY)  ? 0x0002 : 0)|
 178                         ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
 179                         ((skt->status&SS_BATWARN)? 0x0020 : 0)|
 180                         ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
 181                         ((skt->status&SS_WRPROT) ? 0x0008 : 0);
 182
 183         if (!(ncpr & 0x0003)) {
 184                 SCOOP_DEV[skt->nr].keep_rd = 0;
 185         } else if (!SCOOP_DEV[skt->nr].keep_rd) {
 186                 if (nccr & 0x0080)
 187                         SCOOP_DEV[skt->nr].keep_rd = 1;
 188                 else
 189                         nccr |= 0x0080;
 190         }
 191
 192         if (mcr != nmcr)
 193                 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
 194         if (cpr != ncpr) {
 195                 if (platform_scoop_config->power_ctrl)
 196                         platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
 197                 else
 198                         write_scoop_reg(scoop, SCOOP_CPR, ncpr);
 199         }
 200         if (ccr != nccr)
 201                 write_scoop_reg(scoop, SCOOP_CCR, nccr);
 202         if (imr != nimr)
 203                 write_scoop_reg(scoop, SCOOP_IMR, nimr);
 204
 205         local_irq_restore(flags);
 206
 207         return 0;
 208 }
 209
 210 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 211 {
 212         sharpsl_pcmcia_init_reset(skt);
 213
 214         /* Enable interrupt */
 215         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
 216         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
 217         SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 218 }
 219
 220 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 221 {
 222         sharpsl_pcmcia_init_reset(skt);
 223 }
 224
 225 static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = {
 226         .owner                  = THIS_MODULE,
 227         .hw_init                = sharpsl_pcmcia_hw_init,
 228         .hw_shutdown            = sharpsl_pcmcia_hw_shutdown,
 229         .socket_state           = sharpsl_pcmcia_socket_state,
 230         .configure_socket       = sharpsl_pcmcia_configure_socket,
 231         .socket_init            = sharpsl_pcmcia_socket_init,
 232         .socket_suspend         = sharpsl_pcmcia_socket_suspend,
 233         .first                  = 0,
 234         .nr                     = 0,
 235 };
 236
 237 #ifdef CONFIG_SA1100_COLLIE
 238 #include "sa11xx_base.h"
 239
 240 int __init pcmcia_collie_init(struct device *dev)
 241 {
 242        int ret = -ENODEV;
 243
 244        if (machine_is_collie())
 245                ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
 246
 247        return ret;
 248 }
 249
 250 #else
 251
 252 static struct platform_device *sharpsl_pcmcia_device;
 253
 254 static int __init sharpsl_pcmcia_init(void)
 255 {
 256         int ret;
 257
 258         sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
 259         sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 260
 261         if (!sharpsl_pcmcia_device)
 262                 return -ENOMEM;
 263
 264         ret = platform_device_add_data(sharpsl_pcmcia_device,
 265                         &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
 266         if (ret == 0) {
 267                 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
 268                 ret = platform_device_add(sharpsl_pcmcia_device);
 269         }
 270
 271         if (ret)
 272                 platform_device_put(sharpsl_pcmcia_device);
 273
 274         return ret;
 275 }
 276
 277 static void __exit sharpsl_pcmcia_exit(void)
 278 {
 279         platform_device_unregister(sharpsl_pcmcia_device);
 280 }
 281
 282 fs_initcall(sharpsl_pcmcia_init);
 283 module_exit(sharpsl_pcmcia_exit);
 284 #endif
 285
 286 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 287 MODULE_LICENSE("GPL");
 288 MODULE_ALIAS("platform:pxa2xx-pcmcia");