linux/drivers/pcmcia/pxa2xx_sharpsl.c
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   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
  31static 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
  47static 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
  59static 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
 109static 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
 182static 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
 192static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 193{
 194        sharpsl_pcmcia_init_reset(skt);
 195}
 196
 197static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = {
 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
 211int __devinit 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
 223static struct platform_device *sharpsl_pcmcia_device;
 224
 225static 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
 251static void __exit sharpsl_pcmcia_exit(void)
 252{
 253        platform_device_unregister(sharpsl_pcmcia_device);
 254}
 255
 256fs_initcall(sharpsl_pcmcia_init);
 257module_exit(sharpsl_pcmcia_exit);
 258#endif
 259
 260MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 261MODULE_LICENSE("GPL");
 262MODULE_ALIAS("platform:pxa2xx-pcmcia");
 263
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