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 #define IDX_IRQ_S0_READY_NINT   (0)
  25 #define IDX_IRQ_S0_CD_VALID     (1)
  26 #define IDX_IRQ_S0_BVD1_STSCHG  (2)
  27 #define IDX_IRQ_S1_READY_NINT   (3)
  28 #define IDX_IRQ_S1_CD_VALID     (4)
  29 #define IDX_IRQ_S1_BVD1_STSCHG  (5)
  30
  31 static struct pcmcia_irqs irqs[] = {
  32         { 0, NO_IRQ, "SA1111 PCMCIA card detect" },
  33         { 0, NO_IRQ, "SA1111 PCMCIA BVD1"        },
  34         { 1, NO_IRQ, "SA1111 CF card detect"     },
  35         { 1, NO_IRQ, "SA1111 CF BVD1"            },
  36 };
  37
  38 static int sa1111_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  39 {
  40         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  41 }
  42
  43 static void sa1111_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  44 {
  45         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  46 }
  47
  48 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  49 {
  50         struct sa1111_pcmcia_socket *s = to_skt(skt);
  51         unsigned long status = sa1111_readl(s->dev->mapbase + SA1111_PCSR);
  52
  53         switch (skt->nr) {
  54         case 0:
  55                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  56                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  57                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  58                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  59                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  60                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  61                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  62                 break;
  63
  64         case 1:
  65                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  66                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  67                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  68                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  69                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  70                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  71                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  72                 break;
  73         }
  74 }
  75
  76 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  77 {
  78         struct sa1111_pcmcia_socket *s = to_skt(skt);
  79         unsigned int pccr_skt_mask, pccr_set_mask, val;
  80         unsigned long flags;
  81
  82         switch (skt->nr) {
  83         case 0:
  84                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
  85                 break;
  86
  87         case 1:
  88                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
  89                 break;
  90
  91         default:
  92                 return -1;
  93         }
  94
  95         pccr_set_mask = 0;
  96
  97         if (state->Vcc != 0)
  98                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
  99         if (state->Vcc == 50)
 100                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 101         if (state->flags & SS_RESET)
 102                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 103         if (state->flags & SS_OUTPUT_ENA)
 104                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
 105
 106         local_irq_save(flags);
 107         val = sa1111_readl(s->dev->mapbase + SA1111_PCCR);
 108         val &= ~pccr_skt_mask;
 109         val |= pccr_set_mask & pccr_skt_mask;
 110         sa1111_writel(val, s->dev->mapbase + SA1111_PCCR);
 111         local_irq_restore(flags);
 112
 113         return 0;
 114 }
 115
 116 void sa1111_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 117 {
 118         soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 119 }
 120
 121 static void sa1111_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 122 {
 123         soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
 124 }
 125
 126 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 127         int (*add)(struct soc_pcmcia_socket *))
 128 {
 129         struct sa1111_pcmcia_socket *s;
 130         int i, ret = 0;
 131
 132         ops->hw_init = sa1111_pcmcia_hw_init;
 133         ops->hw_shutdown = sa1111_pcmcia_hw_shutdown;
 134         ops->socket_state = sa1111_pcmcia_socket_state;
 135         ops->socket_suspend = sa1111_pcmcia_socket_suspend;
 136
 137         for (i = 0; i < ops->nr; i++) {
 138                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 139                 if (!s)
 140                         return -ENOMEM;
 141
 142                 s->soc.nr = ops->first + i;
 143                 s->soc.ops = ops;
 144                 s->soc.socket.owner = ops->owner;
 145                 s->soc.socket.dev.parent = &dev->dev;
 146                 s->soc.socket.pci_irq = s->soc.nr ?
 147                                 dev->irq[IDX_IRQ_S0_READY_NINT] :
 148                                 dev->irq[IDX_IRQ_S1_READY_NINT];
 149                 s->dev = dev;
 150
 151                 ret = add(&s->soc);
 152                 if (ret == 0) {
 153                         s->next = dev_get_drvdata(&dev->dev);
 154                         dev_set_drvdata(&dev->dev, s);
 155                 } else
 156                         kfree(s);
 157         }
 158
 159         return ret;
 160 }
 161
 162 static int pcmcia_probe(struct sa1111_dev *dev)
 163 {
 164         void __iomem *base;
 165
 166         dev_set_drvdata(&dev->dev, NULL);
 167
 168         if (!request_mem_region(dev->res.start, 512,
 169                                 SA1111_DRIVER_NAME(dev)))
 170                 return -EBUSY;
 171
 172         base = dev->mapbase;
 173
 174         /* Initialize PCMCIA IRQs */
 175         irqs[0].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
 176         irqs[1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
 177         irqs[2].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
 178         irqs[3].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
 179
 180         /*
 181          * Initialise the suspend state.
 182          */
 183         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + SA1111_PCSSR);
 184         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + SA1111_PCCR);
 185
 186 #ifdef CONFIG_SA1100_BADGE4
 187         pcmcia_badge4_init(&dev->dev);
 188 #endif
 189 #ifdef CONFIG_SA1100_JORNADA720
 190         pcmcia_jornada720_init(&dev->dev);
 191 #endif
 192 #ifdef CONFIG_ARCH_LUBBOCK
 193         pcmcia_lubbock_init(dev);
 194 #endif
 195 #ifdef CONFIG_ASSABET_NEPONSET
 196         pcmcia_neponset_init(dev);
 197 #endif
 198         return 0;
 199 }
 200
 201 static int __devexit pcmcia_remove(struct sa1111_dev *dev)
 202 {
 203         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 204
 205         dev_set_drvdata(&dev->dev, NULL);
 206
 207         for (; next = s->next, s; s = next) {
 208                 soc_pcmcia_remove_one(&s->soc);
 209                 kfree(s);
 210         }
 211
 212         release_mem_region(dev->res.start, 512);
 213         return 0;
 214 }
 215
 216 static int pcmcia_suspend(struct sa1111_dev *dev, pm_message_t state)
 217 {
 218         return pcmcia_socket_dev_suspend(&dev->dev);
 219 }
 220
 221 static int pcmcia_resume(struct sa1111_dev *dev)
 222 {
 223         return pcmcia_socket_dev_resume(&dev->dev);
 224 }
 225
 226 static struct sa1111_driver pcmcia_driver = {
 227         .drv = {
 228                 .name   = "sa1111-pcmcia",
 229         },
 230         .devid          = SA1111_DEVID_PCMCIA,
 231         .probe          = pcmcia_probe,
 232         .remove         = __devexit_p(pcmcia_remove),
 233         .suspend        = pcmcia_suspend,
 234         .resume         = pcmcia_resume,
 235 };
 236
 237 static int __init sa1111_drv_pcmcia_init(void)
 238 {
 239         return sa1111_driver_register(&pcmcia_driver);
 240 }
 241
 242 static void __exit sa1111_drv_pcmcia_exit(void)
 243 {
 244         sa1111_driver_unregister(&pcmcia_driver);
 245 }
 246
 247 fs_initcall(sa1111_drv_pcmcia_init);
 248 module_exit(sa1111_drv_pcmcia_exit);
 249
 250 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 251 MODULE_LICENSE("GPL");