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 /*
  26  * These are offsets from the above base.
  27  */
  28 #define PCCR    0x0000
  29 #define PCSSR   0x0004
  30 #define PCSR    0x0008
  31
  32 #define PCSR_S0_READY   (1<<0)
  33 #define PCSR_S1_READY   (1<<1)
  34 #define PCSR_S0_DETECT  (1<<2)
  35 #define PCSR_S1_DETECT  (1<<3)
  36 #define PCSR_S0_VS1     (1<<4)
  37 #define PCSR_S0_VS2     (1<<5)
  38 #define PCSR_S1_VS1     (1<<6)
  39 #define PCSR_S1_VS2     (1<<7)
  40 #define PCSR_S0_WP      (1<<8)
  41 #define PCSR_S1_WP      (1<<9)
  42 #define PCSR_S0_BVD1    (1<<10)
  43 #define PCSR_S0_BVD2    (1<<11)
  44 #define PCSR_S1_BVD1    (1<<12)
  45 #define PCSR_S1_BVD2    (1<<13)
  46
  47 #define PCCR_S0_RST     (1<<0)
  48 #define PCCR_S1_RST     (1<<1)
  49 #define PCCR_S0_FLT     (1<<2)
  50 #define PCCR_S1_FLT     (1<<3)
  51 #define PCCR_S0_PWAITEN (1<<4)
  52 #define PCCR_S1_PWAITEN (1<<5)
  53 #define PCCR_S0_PSE     (1<<6)
  54 #define PCCR_S1_PSE     (1<<7)
  55
  56 #define PCSSR_S0_SLEEP  (1<<0)
  57 #define PCSSR_S1_SLEEP  (1<<1)
  58
  59 #define IDX_IRQ_S0_READY_NINT   (0)
  60 #define IDX_IRQ_S0_CD_VALID     (1)
  61 #define IDX_IRQ_S0_BVD1_STSCHG  (2)
  62 #define IDX_IRQ_S1_READY_NINT   (3)
  63 #define IDX_IRQ_S1_CD_VALID     (4)
  64 #define IDX_IRQ_S1_BVD1_STSCHG  (5)
  65
  66 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  67 {
  68         struct sa1111_pcmcia_socket *s = to_skt(skt);
  69         unsigned long status = sa1111_readl(s->dev->mapbase + PCSR);
  70
  71         switch (skt->nr) {
  72         case 0:
  73                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  74                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  75                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  76                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  77                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  78                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  79                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  80                 break;
  81
  82         case 1:
  83                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  84                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  85                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  86                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  87                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  88                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  89                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  90                 break;
  91         }
  92 }
  93
  94 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  95 {
  96         struct sa1111_pcmcia_socket *s = to_skt(skt);
  97         unsigned int pccr_skt_mask, pccr_set_mask, val;
  98         unsigned long flags;
  99
 100         switch (skt->nr) {
 101         case 0:
 102                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
 103                 break;
 104
 105         case 1:
 106                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
 107                 break;
 108
 109         default:
 110                 return -1;
 111         }
 112
 113         pccr_set_mask = 0;
 114
 115         if (state->Vcc != 0)
 116                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
 117         if (state->Vcc == 50)
 118                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 119         if (state->flags & SS_RESET)
 120                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 121         if (state->flags & SS_OUTPUT_ENA)
 122                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
 123
 124         local_irq_save(flags);
 125         val = sa1111_readl(s->dev->mapbase + PCCR);
 126         val &= ~pccr_skt_mask;
 127         val |= pccr_set_mask & pccr_skt_mask;
 128         sa1111_writel(val, s->dev->mapbase + PCCR);
 129         local_irq_restore(flags);
 130
 131         return 0;
 132 }
 133
 134 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 135         int (*add)(struct soc_pcmcia_socket *))
 136 {
 137         struct sa1111_pcmcia_socket *s;
 138         int i, ret = 0;
 139
 140         ops->socket_state = sa1111_pcmcia_socket_state;
 141
 142         for (i = 0; i < ops->nr; i++) {
 143                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 144                 if (!s)
 145                         return -ENOMEM;
 146
 147                 s->soc.nr = ops->first + i;
 148                 s->soc.clk = clk_get(&dev->dev, NULL);
 149                 if (IS_ERR(s->soc.clk)) {
 150                         ret = PTR_ERR(s->soc.clk);
 151                         kfree(s);
 152                         return ret;
 153                 }
 154                 soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
 155                 s->dev = dev;
 156                 if (s->soc.nr) {
 157                         s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
 158                         s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
 159                         s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
 160                         s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
 161                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
 162                 } else {
 163                         s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
 164                         s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
 165                         s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
 166                         s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
 167                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
 168                 }
 169
 170                 ret = add(&s->soc);
 171                 if (ret == 0) {
 172                         s->next = dev_get_drvdata(&dev->dev);
 173                         dev_set_drvdata(&dev->dev, s);
 174                 } else
 175                         kfree(s);
 176         }
 177
 178         return ret;
 179 }
 180
 181 static int pcmcia_probe(struct sa1111_dev *dev)
 182 {
 183         void __iomem *base;
 184         int ret;
 185
 186         ret = sa1111_enable_device(dev);
 187         if (ret)
 188                 return ret;
 189
 190         dev_set_drvdata(&dev->dev, NULL);
 191
 192         if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
 193                 sa1111_disable_device(dev);
 194                 return -EBUSY;
 195         }
 196
 197         base = dev->mapbase;
 198
 199         /*
 200          * Initialise the suspend state.
 201          */
 202         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
 203         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
 204
 205 #ifdef CONFIG_SA1100_BADGE4
 206         pcmcia_badge4_init(dev);
 207 #endif
 208 #ifdef CONFIG_SA1100_JORNADA720
 209         pcmcia_jornada720_init(dev);
 210 #endif
 211 #ifdef CONFIG_ARCH_LUBBOCK
 212         pcmcia_lubbock_init(dev);
 213 #endif
 214 #ifdef CONFIG_ASSABET_NEPONSET
 215         pcmcia_neponset_init(dev);
 216 #endif
 217         return 0;
 218 }
 219
 220 static int pcmcia_remove(struct sa1111_dev *dev)
 221 {
 222         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 223
 224         dev_set_drvdata(&dev->dev, NULL);
 225
 226         for (; s; s = next) {
 227                 next = s->next;
 228                 soc_pcmcia_remove_one(&s->soc);
 229                 clk_put(s->soc.clk);
 230                 kfree(s);
 231         }
 232
 233         release_mem_region(dev->res.start, 512);
 234         sa1111_disable_device(dev);
 235         return 0;
 236 }
 237
 238 static struct sa1111_driver pcmcia_driver = {
 239         .drv = {
 240                 .name   = "sa1111-pcmcia",
 241         },
 242         .devid          = SA1111_DEVID_PCMCIA,
 243         .probe          = pcmcia_probe,
 244         .remove         = pcmcia_remove,
 245 };
 246
 247 static int __init sa1111_drv_pcmcia_init(void)
 248 {
 249         return sa1111_driver_register(&pcmcia_driver);
 250 }
 251
 252 static void __exit sa1111_drv_pcmcia_exit(void)
 253 {
 254         sa1111_driver_unregister(&pcmcia_driver);
 255 }
 256
 257 fs_initcall(sa1111_drv_pcmcia_init);
 258 module_exit(sa1111_drv_pcmcia_exit);
 259
 260 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 261 MODULE_LICENSE("GPL");