drivers/pcmcia/pxa2xx_sharpsl.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Sharp SL-C7xx Series PCMCIA routines
   4  *
   5  * Copyright (c) 2004-2005 Richard Purdie
   6  *
   7  * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16
  17 #include <asm/mach-types.h>
  18 #include <asm/irq.h>
  19 #include <asm/hardware/scoop.h>
  20
  21 #include <pcmcia/soc_common.h>
  22
  23 #define NO_KEEP_VS 0x0001
  24 #define SCOOP_DEV platform_scoop_config->devs
  25
  26 static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
  27 {
  28         struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
  29
  30         reset_scoop(scoopdev->dev);
  31
  32         /* Shared power controls need to be handled carefully */
  33         if (platform_scoop_config->power_ctrl)
  34                 platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
  35         else
  36                 write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
  37
  38         scoopdev->keep_vs = NO_KEEP_VS;
  39         scoopdev->keep_rd = 0;
  40 }
  41
  42 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  43 {
  44         if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
  45                 skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
  46                 skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
  47         }
  48
  49         skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;
  50
  51         return 0;
  52 }
  53
  54 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  55                                     struct pcmcia_state *state)
  56 {
  57         unsigned short cpr, csr;
  58         struct device *scoop = SCOOP_DEV[skt->nr].dev;
  59
  60         cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
  61
  62         write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
  63         write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
  64         write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
  65         csr = read_scoop_reg(scoop, SCOOP_CSR);
  66         if (csr & 0x0004) {
  67                 /* card eject */
  68                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
  69                 SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
  70         }
  71         else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
  72                 /* keep vs1,vs2 */
  73                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
  74                 csr |= SCOOP_DEV[skt->nr].keep_vs;
  75         }
  76         else if (cpr & 0x0003) {
  77                 /* power on */
  78                 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
  79                 SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
  80         }
  81         else {
  82                 /* card detect */
  83                 if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
  84                         write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
  85                 } else {
  86                         write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
  87                 }
  88         }
  89
  90         state->detect = (csr & 0x0004) ? 0 : 1;
  91         state->ready  = (csr & 0x0002) ? 1 : 0;
  92         state->bvd1   = (csr & 0x0010) ? 1 : 0;
  93         state->bvd2   = (csr & 0x0020) ? 1 : 0;
  94         state->wrprot = (csr & 0x0008) ? 1 : 0;
  95         state->vs_3v  = (csr & 0x0040) ? 0 : 1;
  96         state->vs_Xv  = (csr & 0x0080) ? 0 : 1;
  97
  98         if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
  99                 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
 100         }
 101 }
 102
 103
 104 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 105                                        const socket_state_t *state)
 106 {
 107         unsigned long flags;
 108         struct device *scoop = SCOOP_DEV[skt->nr].dev;
 109
 110         unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
 111
 112         switch (state->Vcc) {
 113         case    0:      break;
 114         case    33:     break;
 115         case    50:     break;
 116         default:
 117                  printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
 118                  return -1;
 119         }
 120
 121         if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
 122                 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
 123                 return -1;
 124         }
 125
 126         local_irq_save(flags);
 127
 128         nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
 129         ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
 130         nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
 131         nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
 132
 133         if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
 134                 ncpr |= (state->Vcc == 33) ? 0x0002 :
 135                         (state->Vcc == 50) ? 0x0002 : 0;
 136         } else {
 137                 ncpr |= (state->Vcc == 33) ? 0x0001 :
 138                         (state->Vcc == 50) ? 0x0002 : 0;
 139         }
 140         nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
 141         ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
 142         nccr |= (state->flags&SS_RESET)? 0x0080: 0;
 143         nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
 144                         ((skt->status&SS_READY)  ? 0x0002 : 0)|
 145                         ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
 146                         ((skt->status&SS_BATWARN)? 0x0020 : 0)|
 147                         ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
 148                         ((skt->status&SS_WRPROT) ? 0x0008 : 0);
 149
 150         if (!(ncpr & 0x0003)) {
 151                 SCOOP_DEV[skt->nr].keep_rd = 0;
 152         } else if (!SCOOP_DEV[skt->nr].keep_rd) {
 153                 if (nccr & 0x0080)
 154                         SCOOP_DEV[skt->nr].keep_rd = 1;
 155                 else
 156                         nccr |= 0x0080;
 157         }
 158
 159         if (mcr != nmcr)
 160                 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
 161         if (cpr != ncpr) {
 162                 if (platform_scoop_config->power_ctrl)
 163                         platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
 164                 else
 165                         write_scoop_reg(scoop, SCOOP_CPR, ncpr);
 166         }
 167         if (ccr != nccr)
 168                 write_scoop_reg(scoop, SCOOP_CCR, nccr);
 169         if (imr != nimr)
 170                 write_scoop_reg(scoop, SCOOP_IMR, nimr);
 171
 172         local_irq_restore(flags);
 173
 174         return 0;
 175 }
 176
 177 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 178 {
 179         sharpsl_pcmcia_init_reset(skt);
 180
 181         /* Enable interrupt */
 182         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
 183         write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
 184         SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
 185 }
 186
 187 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 188 {
 189         sharpsl_pcmcia_init_reset(skt);
 190 }
 191
 192 static struct pcmcia_low_level sharpsl_pcmcia_ops = {
 193         .owner                  = THIS_MODULE,
 194         .hw_init                = sharpsl_pcmcia_hw_init,
 195         .socket_state           = sharpsl_pcmcia_socket_state,
 196         .configure_socket       = sharpsl_pcmcia_configure_socket,
 197         .socket_init            = sharpsl_pcmcia_socket_init,
 198         .socket_suspend         = sharpsl_pcmcia_socket_suspend,
 199         .first                  = 0,
 200         .nr                     = 0,
 201 };
 202
 203 #ifdef CONFIG_SA1100_COLLIE
 204 #include "sa11xx_base.h"
 205
 206 int pcmcia_collie_init(struct device *dev)
 207 {
 208        int ret = -ENODEV;
 209
 210        if (machine_is_collie())
 211                ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
 212
 213        return ret;
 214 }
 215
 216 #else
 217
 218 static struct platform_device *sharpsl_pcmcia_device;
 219
 220 static int __init sharpsl_pcmcia_init(void)
 221 {
 222         int ret;
 223
 224         if (!platform_scoop_config)
 225                 return -ENODEV;
 226
 227         sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
 228         sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 229
 230         if (!sharpsl_pcmcia_device)
 231                 return -ENOMEM;
 232
 233         ret = platform_device_add_data(sharpsl_pcmcia_device,
 234                         &sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
 235         if (ret == 0) {
 236                 sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
 237                 ret = platform_device_add(sharpsl_pcmcia_device);
 238         }
 239
 240         if (ret)
 241                 platform_device_put(sharpsl_pcmcia_device);
 242
 243         return ret;
 244 }
 245
 246 static void __exit sharpsl_pcmcia_exit(void)
 247 {
 248         platform_device_unregister(sharpsl_pcmcia_device);
 249 }
 250
 251 fs_initcall(sharpsl_pcmcia_init);
 252 module_exit(sharpsl_pcmcia_exit);
 253 #endif
 254
 255 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
 256 MODULE_LICENSE("GPL");
 257 MODULE_ALIAS("platform:pxa2xx-pcmcia");