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