linux/drivers/pcmcia/pxa2xx_sharpsl.c
<<
>>
Prefs
   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        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
  71static 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
  84static 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
 134static 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
 207static 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
 217static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 218{
 219        sharpsl_pcmcia_init_reset(skt);
 220}
 221
 222static struct pcmcia_low_level sharpsl_pcmcia_ops __initdata = {
 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
 237int __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
 249static struct platform_device *sharpsl_pcmcia_device;
 250
 251static 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
 277static void __exit sharpsl_pcmcia_exit(void)
 278{
 279        platform_device_unregister(sharpsl_pcmcia_device);
 280}
 281
 282fs_initcall(sharpsl_pcmcia_init);
 283module_exit(sharpsl_pcmcia_exit);
 284#endif
 285
 286MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 287MODULE_LICENSE("GPL");
 288MODULE_ALIAS("platform:pxa2xx-pcmcia");
 289