drivers/pcmcia/sa1111_generic.c

   1 /*
   2  * linux/drivers/pcmcia/sa1111_generic.c
   3  *
   4  * We implement the generic parts of a SA1111 PCMCIA driver.  This
   5  * basically means we handle everything except controlling the
   6  * power.  Power is machine specific...
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/ioport.h>
  11 #include <linux/device.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15
  16 #include <pcmcia/ss.h>
  17
  18 #include <mach/hardware.h>
  19 #include <asm/hardware/sa1111.h>
  20 #include <asm/irq.h>
  21
  22 #include "sa1111_generic.h"
  23
  24 static struct pcmcia_irqs irqs[] = {
  25         { 0, IRQ_S0_CD_VALID,    "SA1111 PCMCIA card detect" },
  26         { 0, IRQ_S0_BVD1_STSCHG, "SA1111 PCMCIA BVD1"        },
  27         { 1, IRQ_S1_CD_VALID,    "SA1111 CF card detect"     },
  28         { 1, IRQ_S1_BVD1_STSCHG, "SA1111 CF BVD1"            },
  29 };
  30
  31 static int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  32 {
  33         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  34 }
  35
  36 static void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  37 {
  38         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  39 }
  40
  41 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  42 {
  43         struct sa1111_pcmcia_socket *s = to_skt(skt);
  44         unsigned long status = sa1111_readl(s->dev->mapbase + SA1111_PCSR);
  45
  46         switch (skt->nr) {
  47         case 0:
  48                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  49                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  50                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  51                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  52                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  53                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  54                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  55                 break;
  56
  57         case 1:
  58                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  59                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  60                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  61                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  62                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  63                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  64                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  65                 break;
  66         }
  67 }
  68
  69 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  70 {
  71         struct sa1111_pcmcia_socket *s = to_skt(skt);
  72         unsigned int pccr_skt_mask, pccr_set_mask, val;
  73         unsigned long flags;
  74
  75         switch (skt->nr) {
  76         case 0:
  77                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
  78                 break;
  79
  80         case 1:
  81                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
  82                 break;
  83
  84         default:
  85                 return -1;
  86         }
  87
  88         pccr_set_mask = 0;
  89
  90         if (state->Vcc != 0)
  91                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
  92         if (state->Vcc == 50)
  93                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
  94         if (state->flags & SS_RESET)
  95                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
  96         if (state->flags & SS_OUTPUT_ENA)
  97                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
  98
  99         local_irq_save(flags);
 100         val = sa1111_readl(s->dev->mapbase + SA1111_PCCR);
 101         val &= ~pccr_skt_mask;
 102         val |= pccr_set_mask & pccr_skt_mask;
 103         sa1111_writel(val, s->dev->mapbase + SA1111_PCCR);
 104         local_irq_restore(flags);
 105
 106         return 0;
 107 }
 108
 109 void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 110 {
 111         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 112 }
 113
 114 static void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 115 {
 116         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 117 }
 118
 119 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 120         int (*add)(struct soc_pcmcia_socket *))
 121 {
 122         struct sa1111_pcmcia_socket *s;
 123         int i, ret = 0;
 124
 125         ops->hw_init = sa1111_pcmcia_hw_init;
 126         ops->hw_shutdown = sa1111_pcmcia_hw_shutdown;
 127         ops->socket_state = sa1111_pcmcia_socket_state;
 128         ops->socket_suspend = sa1111_pcmcia_socket_suspend;
 129
 130         for (i = 0; i < ops->nr; i++) {
 131                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 132                 if (!s)
 133                         return -ENOMEM;
 134
 135                 s->soc.nr = ops->first + i;
 136                 s->soc.ops = ops;
 137                 s->soc.socket.owner = ops->owner;
 138                 s->soc.socket.dev.parent = &dev->dev;
 139                 s->soc.socket.pci_irq = s->soc.nr ? IRQ_S1_READY_NINT : IRQ_S0_READY_NINT;
 140                 s->dev = dev;
 141
 142                 ret = add(&s->soc);
 143                 if (ret == 0) {
 144                         s->next = dev_get_drvdata(&dev->dev);
 145                         dev_set_drvdata(&dev->dev, s);
 146                 } else
 147                         kfree(s);
 148         }
 149
 150         return ret;
 151 }
 152
 153 static int pcmcia_probe(struct sa1111_dev *dev)
 154 {
 155         void __iomem *base;
 156
 157         dev_set_drvdata(&dev->dev, NULL);
 158
 159         if (!request_mem_region(dev->res.start, 512,
 160                                 SA1111_DRIVER_NAME(dev)))
 161                 return -EBUSY;
 162
 163         base = dev->mapbase;
 164
 165         /*
 166          * Initialise the suspend state.
 167          */
 168         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
 169         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
 170
 171 #ifdef CONFIG_SA1100_BADGE4
 172         pcmcia_badge4_init(&dev->dev);
 173 #endif
 174 #ifdef CONFIG_SA1100_JORNADA720
 175         pcmcia_jornada720_init(&dev->dev);
 176 #endif
 177 #ifdef CONFIG_ARCH_LUBBOCK
 178         pcmcia_lubbock_init(dev);
 179 #endif
 180 #ifdef CONFIG_ASSABET_NEPONSET
 181         pcmcia_neponset_init(dev);
 182 #endif
 183         return 0;
 184 }
 185
 186 static int __devexit pcmcia_remove(struct sa1111_dev *dev)
 187 {
 188         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 189
 190         dev_set_drvdata(&dev->dev, NULL);
 191
 192         for (; next = s->next, s; s = next) {
 193                 soc_pcmcia_remove_one(&s->soc);
 194                 kfree(s);
 195         }
 196
 197         release_mem_region(dev->res.start, 512);
 198         return 0;
 199 }
 200
 201 static int pcmcia_suspend(struct sa1111_dev *dev, pm_message_t state)
 202 {
 203         return pcmcia_socket_dev_suspend(&dev->dev);
 204 }
 205
 206 static int pcmcia_resume(struct sa1111_dev *dev)
 207 {
 208         return pcmcia_socket_dev_resume(&dev->dev);
 209 }
 210
 211 static struct sa1111_driver pcmcia_driver = {
 212         .drv = {
 213                 .name   = "sa1111-pcmcia",
 214         },
 215         .devid          = SA1111_DEVID_PCMCIA,
 216         .probe          = pcmcia_probe,
 217         .remove         = __devexit_p(pcmcia_remove),
 218         .suspend        = pcmcia_suspend,
 219         .resume         = pcmcia_resume,
 220 };
 221
 222 static int __init sa1111_drv_pcmcia_init(void)
 223 {
 224         return sa1111_driver_register(&pcmcia_driver);
 225 }
 226
 227 static void __exit sa1111_drv_pcmcia_exit(void)
 228 {
 229         sa1111_driver_unregister(&pcmcia_driver);
 230 }
 231
 232 fs_initcall(sa1111_drv_pcmcia_init);
 233 module_exit(sa1111_drv_pcmcia_exit);
 234
 235 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 236 MODULE_LICENSE("GPL");