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