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