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         s = kzalloc(sizeof(*s) * ops->nr, GFP_KERNEL);
 131         if (!s)
 132                 return -ENODEV;
 133
 134         for (i = 0; i < ops->nr; i++) {
 135                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 136                 if (!s)
 137                         return -ENOMEM;
 138
 139                 s->soc.nr = ops->first + i;
 140                 s->soc.ops = ops;
 141                 s->soc.socket.owner = ops->owner;
 142                 s->soc.socket.dev.parent = &dev->dev;
 143                 s->soc.socket.pci_irq = s->soc.nr ? IRQ_S1_READY_NINT : IRQ_S0_READY_NINT;
 144                 s->dev = dev;
 145
 146                 ret = add(&s->soc);
 147                 if (ret == 0) {
 148                         s->next = dev_get_drvdata(&dev->dev);
 149                         dev_set_drvdata(&dev->dev, s);
 150                 } else
 151                         kfree(s);
 152         }
 153
 154         return ret;
 155 }
 156
 157 static int pcmcia_probe(struct sa1111_dev *dev)
 158 {
 159         void __iomem *base;
 160
 161         dev_set_drvdata(&dev->dev, NULL);
 162
 163         if (!request_mem_region(dev->res.start, 512,
 164                                 SA1111_DRIVER_NAME(dev)))
 165                 return -EBUSY;
 166
 167         base = dev->mapbase;
 168
 169         /*
 170          * Initialise the suspend state.
 171          */
 172         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
 173         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
 174
 175 #ifdef CONFIG_SA1100_BADGE4
 176         pcmcia_badge4_init(&dev->dev);
 177 #endif
 178 #ifdef CONFIG_SA1100_JORNADA720
 179         pcmcia_jornada720_init(&dev->dev);
 180 #endif
 181 #ifdef CONFIG_ARCH_LUBBOCK
 182         pcmcia_lubbock_init(dev);
 183 #endif
 184 #ifdef CONFIG_ASSABET_NEPONSET
 185         pcmcia_neponset_init(dev);
 186 #endif
 187         return 0;
 188 }
 189
 190 static int __devexit pcmcia_remove(struct sa1111_dev *dev)
 191 {
 192         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 193
 194         dev_set_drvdata(&dev->dev, NULL);
 195
 196         for (; next = s->next, s; s = next) {
 197                 soc_pcmcia_remove_one(&s->soc);
 198                 kfree(s);
 199         }
 200
 201         release_mem_region(dev->res.start, 512);
 202         return 0;
 203 }
 204
 205 static int pcmcia_suspend(struct sa1111_dev *dev, pm_message_t state)
 206 {
 207         return pcmcia_socket_dev_suspend(&dev->dev);
 208 }
 209
 210 static int pcmcia_resume(struct sa1111_dev *dev)
 211 {
 212         return pcmcia_socket_dev_resume(&dev->dev);
 213 }
 214
 215 static struct sa1111_driver pcmcia_driver = {
 216         .drv = {
 217                 .name   = "sa1111-pcmcia",
 218         },
 219         .devid          = SA1111_DEVID_PCMCIA,
 220         .probe          = pcmcia_probe,
 221         .remove         = __devexit_p(pcmcia_remove),
 222         .suspend        = pcmcia_suspend,
 223         .resume         = pcmcia_resume,
 224 };
 225
 226 static int __init sa1111_drv_pcmcia_init(void)
 227 {
 228         return sa1111_driver_register(&pcmcia_driver);
 229 }
 230
 231 static void __exit sa1111_drv_pcmcia_exit(void)
 232 {
 233         sa1111_driver_unregister(&pcmcia_driver);
 234 }
 235
 236 fs_initcall(sa1111_drv_pcmcia_init);
 237 module_exit(sa1111_drv_pcmcia_exit);
 238
 239 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 240 MODULE_LICENSE("GPL");