drivers/pcmcia/pxa2xx_trizeps4.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/pcmcia/pxa2xx_trizeps4.c
   4  *
   5  * TRIZEPS PCMCIA specific routines.
   6  *
   7  * Author:      Jürgen Schindele
   8  * Created:     20 02, 2006
   9  * Copyright:   Jürgen Schindele
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/gpio.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <asm/mach-types.h>
  20 #include <asm/irq.h>
  21
  22 #include <mach/pxa2xx-regs.h>
  23 #include <mach/trizeps4.h>
  24
  25 #include "soc_common.h"
  26
  27 extern void board_pcmcia_power(int power);
  28
  29 static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30 {
  31         /* we dont have voltage/card/ready detection
  32          * so we dont need interrupts for it
  33          */
  34         switch (skt->nr) {
  35         case 0:
  36                 skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
  37                 skt->stat[SOC_STAT_CD].name = "cs0_cd";
  38                 skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
  39                 skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
  40                 break;
  41         default:
  42                 break;
  43         }
  44         /* release the reset of this card */
  45         pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
  46
  47         return 0;
  48 }
  49
  50 static unsigned long trizeps_pcmcia_status[2];
  51
  52 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  53                                 struct pcmcia_state *state)
  54 {
  55         unsigned short status = 0, change;
  56         status = CFSR_readw();
  57         change = (status ^ trizeps_pcmcia_status[skt->nr]) &
  58                                 ConXS_CFSR_BVD_MASK;
  59         if (change) {
  60                 trizeps_pcmcia_status[skt->nr] = status;
  61                 if (status & ConXS_CFSR_BVD1) {
  62                         /* enable_irq empty */
  63                 } else {
  64                         /* disable_irq empty */
  65                 }
  66         }
  67
  68         switch (skt->nr) {
  69         case 0:
  70                 /* just fill in fix states */
  71                 state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
  72                 state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
  73                 state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
  74                 state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
  75                 break;
  76
  77 #ifndef CONFIG_MACH_TRIZEPS_CONXS
  78         /* on ConXS we only have one slot. Second is inactive */
  79         case 1:
  80                 state->detect = 0;
  81                 state->ready  = 0;
  82                 state->bvd1   = 0;
  83                 state->bvd2   = 0;
  84                 state->vs_3v  = 0;
  85                 state->vs_Xv  = 0;
  86                 break;
  87
  88 #endif
  89         }
  90 }
  91
  92 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  93                                 const socket_state_t *state)
  94 {
  95         int ret = 0;
  96         unsigned short power = 0;
  97
  98         /* we do nothing here just check a bit */
  99         switch (state->Vcc) {
 100         case 0:  power &= 0xfc; break;
 101         case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
 102         case 50:
 103                 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
 104                 break;
 105         default:
 106                 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
 107                 ret = -1;
 108         }
 109
 110         switch (state->Vpp) {
 111         case 0:  power &= 0xf3; break;
 112         case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
 113         case 120:
 114                 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
 115                 break;
 116         default:
 117                 if (state->Vpp != state->Vcc) {
 118                         pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
 119                         ret = -1;
 120                 }
 121         }
 122
 123         switch (skt->nr) {
 124         case 0:                  /* we only have 3.3V */
 125                 board_pcmcia_power(power);
 126                 break;
 127
 128 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 129         /* on ConXS we only have one slot. Second is inactive */
 130         case 1:
 131 #endif
 132         default:
 133                 break;
 134         }
 135
 136         return ret;
 137 }
 138
 139 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 140 {
 141         /* default is on */
 142         board_pcmcia_power(0x9);
 143 }
 144
 145 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 146 {
 147         board_pcmcia_power(0x0);
 148 }
 149
 150 static struct pcmcia_low_level trizeps_pcmcia_ops = {
 151         .owner                  = THIS_MODULE,
 152         .hw_init                = trizeps_pcmcia_hw_init,
 153         .socket_state           = trizeps_pcmcia_socket_state,
 154         .configure_socket       = trizeps_pcmcia_configure_socket,
 155         .socket_init            = trizeps_pcmcia_socket_init,
 156         .socket_suspend         = trizeps_pcmcia_socket_suspend,
 157 #ifdef CONFIG_MACH_TRIZEPS_CONXS
 158         .nr                     = 1,
 159 #else
 160         .nr                     = 2,
 161 #endif
 162         .first                  = 0,
 163 };
 164
 165 static struct platform_device *trizeps_pcmcia_device;
 166
 167 static int __init trizeps_pcmcia_init(void)
 168 {
 169         int ret;
 170
 171         if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
 172                 return -ENODEV;
 173
 174         trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 175         if (!trizeps_pcmcia_device)
 176                 return -ENOMEM;
 177
 178         ret = platform_device_add_data(trizeps_pcmcia_device,
 179                         &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
 180
 181         if (ret == 0)
 182                 ret = platform_device_add(trizeps_pcmcia_device);
 183
 184         if (ret)
 185                 platform_device_put(trizeps_pcmcia_device);
 186
 187         return ret;
 188 }
 189
 190 static void __exit trizeps_pcmcia_exit(void)
 191 {
 192         platform_device_unregister(trizeps_pcmcia_device);
 193 }
 194
 195 fs_initcall(trizeps_pcmcia_init);
 196 module_exit(trizeps_pcmcia_exit);
 197
 198 MODULE_LICENSE("GPL");
 199 MODULE_AUTHOR("Juergen Schindele");
 200 MODULE_ALIAS("platform:pxa2xx-pcmcia");