release/src-rt-6.x.4708/linux/linux-2.6.36/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 #include <linux/slab.h>
  16
  17 #include <pcmcia/ss.h>
  18
  19 #include <mach/hardware.h>
  20 #include <asm/hardware/sa1111.h>
  21 #include <asm/irq.h>
  22
  23 #include "sa1111_generic.h"
  24
  25 #define IDX_IRQ_S0_READY_NINT   (0)
  26 #define IDX_IRQ_S0_CD_VALID     (1)
  27 #define IDX_IRQ_S0_BVD1_STSCHG  (2)
  28 #define IDX_IRQ_S1_READY_NINT   (3)
  29 #define IDX_IRQ_S1_CD_VALID     (4)
  30 #define IDX_IRQ_S1_BVD1_STSCHG  (5)
  31
  32 static struct pcmcia_irqs irqs[] = {
  33         { 0, NO_IRQ, "SA1111 PCMCIA card detect" },
  34         { 0, NO_IRQ, "SA1111 PCMCIA BVD1"        },
  35         { 1, NO_IRQ, "SA1111 CF card detect"     },
  36         { 1, NO_IRQ, "SA1111 CF BVD1"            },
  37 };
  38
  39 static int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  40 {
  41         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  42 }
  43
  44 static void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  45 {
  46         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  47 }
  48
  49 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  50 {
  51         struct sa1111_pcmcia_socket *s = to_skt(skt);
  52         unsigned long status = sa1111_readl(s->dev->mapbase + SA1111_PCSR);
  53
  54         switch (skt->nr) {
  55         case 0:
  56                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  57                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  58                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  59                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  60                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  61                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  62                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  63                 break;
  64
  65         case 1:
  66                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  67                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  68                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  69                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  70                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  71                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  72                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  73                 break;
  74         }
  75 }
  76
  77 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  78 {
  79         struct sa1111_pcmcia_socket *s = to_skt(skt);
  80         unsigned int pccr_skt_mask, pccr_set_mask, val;
  81         unsigned long flags;
  82
  83         switch (skt->nr) {
  84         case 0:
  85                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
  86                 break;
  87
  88         case 1:
  89                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
  90                 break;
  91
  92         default:
  93                 return -1;
  94         }
  95
  96         pccr_set_mask = 0;
  97
  98         if (state->Vcc != 0)
  99                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
 100         if (state->Vcc == 50)
 101                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 102         if (state->flags & SS_RESET)
 103                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 104         if (state->flags & SS_OUTPUT_ENA)
 105                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
 106
 107         local_irq_save(flags);
 108         val = sa1111_readl(s->dev->mapbase + SA1111_PCCR);
 109         val &= ~pccr_skt_mask;
 110         val |= pccr_set_mask & pccr_skt_mask;
 111         sa1111_writel(val, s->dev->mapbase + SA1111_PCCR);
 112         local_irq_restore(flags);
 113
 114         return 0;
 115 }
 116
 117 void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 118 {
 119         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 120 }
 121
 122 static void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 123 {
 124         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 125 }
 126
 127 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 128         int (*add)(struct soc_pcmcia_socket *))
 129 {
 130         struct sa1111_pcmcia_socket *s;
 131         int i, ret = 0;
 132
 133         ops->hw_init = sa1111_pcmcia_hw_init;
 134         ops->hw_shutdown = sa1111_pcmcia_hw_shutdown;
 135         ops->socket_state = sa1111_pcmcia_socket_state;
 136         ops->socket_suspend = sa1111_pcmcia_socket_suspend;
 137
 138         for (i = 0; i < ops->nr; i++) {
 139                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 140                 if (!s)
 141                         return -ENOMEM;
 142
 143                 s->soc.nr = ops->first + i;
 144                 s->soc.ops = ops;
 145                 s->soc.socket.owner = ops->owner;
 146                 s->soc.socket.dev.parent = &dev->dev;
 147                 s->soc.socket.pci_irq = s->soc.nr ?
 148                                 dev->irq[IDX_IRQ_S0_READY_NINT] :
 149                                 dev->irq[IDX_IRQ_S1_READY_NINT];
 150                 s->dev = dev;
 151
 152                 ret = add(&s->soc);
 153                 if (ret == 0) {
 154                         s->next = dev_get_drvdata(&dev->dev);
 155                         dev_set_drvdata(&dev->dev, s);
 156                 } else
 157                         kfree(s);
 158         }
 159
 160         return ret;
 161 }
 162
 163 static int pcmcia_probe(struct sa1111_dev *dev)
 164 {
 165         void __iomem *base;
 166
 167         dev_set_drvdata(&dev->dev, NULL);
 168
 169         if (!request_mem_region(dev->res.start, 512,
 170                                 SA1111_DRIVER_NAME(dev)))
 171                 return -EBUSY;
 172
 173         base = dev->mapbase;
 174
 175         /* Initialize PCMCIA IRQs */
 176         irqs[0].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
 177         irqs[1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
 178         irqs[2].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
 179         irqs[3].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
 180
 181         /*
 182          * Initialise the suspend state.
 183          */
 184         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
 185         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
 186
 187 #ifdef CONFIG_SA1100_BADGE4
 188         pcmcia_badge4_init(&dev->dev);
 189 #endif
 190 #ifdef CONFIG_SA1100_JORNADA720
 191         pcmcia_jornada720_init(&dev->dev);
 192 #endif
 193 #ifdef CONFIG_ARCH_LUBBOCK
 194         pcmcia_lubbock_init(dev);
 195 #endif
 196 #ifdef CONFIG_ASSABET_NEPONSET
 197         pcmcia_neponset_init(dev);
 198 #endif
 199         return 0;
 200 }
 201
 202 static int __devexit pcmcia_remove(struct sa1111_dev *dev)
 203 {
 204         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 205
 206         dev_set_drvdata(&dev->dev, NULL);
 207
 208         for (; next = s->next, s; s = next) {
 209                 soc_pcmcia_remove_one(&s->soc);
 210                 kfree(s);
 211         }
 212
 213         release_mem_region(dev->res.start, 512);
 214         return 0;
 215 }
 216
 217 static struct sa1111_driver pcmcia_driver = {
 218         .drv = {
 219                 .name   = "sa1111-pcmcia",
 220         },
 221         .devid          = SA1111_DEVID_PCMCIA,
 222         .probe          = pcmcia_probe,
 223         .remove         = __devexit_p(pcmcia_remove),
 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");