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/mach-types.h>
  22 #include <asm/irq.h>
  23
  24 #include "sa1111_generic.h"
  25
  26 /*
  27  * These are offsets from the above base.
  28  */
  29 #define PCCR    0x0000
  30 #define PCSSR   0x0004
  31 #define PCSR    0x0008
  32
  33 #define PCSR_S0_READY   (1<<0)
  34 #define PCSR_S1_READY   (1<<1)
  35 #define PCSR_S0_DETECT  (1<<2)
  36 #define PCSR_S1_DETECT  (1<<3)
  37 #define PCSR_S0_VS1     (1<<4)
  38 #define PCSR_S0_VS2     (1<<5)
  39 #define PCSR_S1_VS1     (1<<6)
  40 #define PCSR_S1_VS2     (1<<7)
  41 #define PCSR_S0_WP      (1<<8)
  42 #define PCSR_S1_WP      (1<<9)
  43 #define PCSR_S0_BVD1    (1<<10)
  44 #define PCSR_S0_BVD2    (1<<11)
  45 #define PCSR_S1_BVD1    (1<<12)
  46 #define PCSR_S1_BVD2    (1<<13)
  47
  48 #define PCCR_S0_RST     (1<<0)
  49 #define PCCR_S1_RST     (1<<1)
  50 #define PCCR_S0_FLT     (1<<2)
  51 #define PCCR_S1_FLT     (1<<3)
  52 #define PCCR_S0_PWAITEN (1<<4)
  53 #define PCCR_S1_PWAITEN (1<<5)
  54 #define PCCR_S0_PSE     (1<<6)
  55 #define PCCR_S1_PSE     (1<<7)
  56
  57 #define PCSSR_S0_SLEEP  (1<<0)
  58 #define PCSSR_S1_SLEEP  (1<<1)
  59
  60 #define IDX_IRQ_S0_READY_NINT   (0)
  61 #define IDX_IRQ_S0_CD_VALID     (1)
  62 #define IDX_IRQ_S0_BVD1_STSCHG  (2)
  63 #define IDX_IRQ_S1_READY_NINT   (3)
  64 #define IDX_IRQ_S1_CD_VALID     (4)
  65 #define IDX_IRQ_S1_BVD1_STSCHG  (5)
  66
  67 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  68 {
  69         struct sa1111_pcmcia_socket *s = to_skt(skt);
  70         unsigned long status = sa1111_readl(s->dev->mapbase + PCSR);
  71
  72         switch (skt->nr) {
  73         case 0:
  74                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  75                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  76                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  77                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  78                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  79                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  80                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  81                 break;
  82
  83         case 1:
  84                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  85                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  86                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  87                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  88                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  89                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  90                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  91                 break;
  92         }
  93 }
  94
  95 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  96 {
  97         struct sa1111_pcmcia_socket *s = to_skt(skt);
  98         unsigned int pccr_skt_mask, pccr_set_mask, val;
  99         unsigned long flags;
 100
 101         switch (skt->nr) {
 102         case 0:
 103                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
 104                 break;
 105
 106         case 1:
 107                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
 108                 break;
 109
 110         default:
 111                 return -1;
 112         }
 113
 114         pccr_set_mask = 0;
 115
 116         if (state->Vcc != 0)
 117                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
 118         if (state->Vcc == 50)
 119                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 120         if (state->flags & SS_RESET)
 121                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 122         if (state->flags & SS_OUTPUT_ENA)
 123                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
 124
 125         local_irq_save(flags);
 126         val = sa1111_readl(s->dev->mapbase + PCCR);
 127         val &= ~pccr_skt_mask;
 128         val |= pccr_set_mask & pccr_skt_mask;
 129         sa1111_writel(val, s->dev->mapbase + PCCR);
 130         local_irq_restore(flags);
 131
 132         return 0;
 133 }
 134
 135 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 136         int (*add)(struct soc_pcmcia_socket *))
 137 {
 138         struct sa1111_pcmcia_socket *s;
 139         struct clk *clk;
 140         int i, ret = 0;
 141
 142         clk = devm_clk_get(&dev->dev, NULL);
 143         if (IS_ERR(clk))
 144                 return PTR_ERR(clk);
 145
 146         ops->socket_state = sa1111_pcmcia_socket_state;
 147
 148         for (i = 0; i < ops->nr; i++) {
 149                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 150                 if (!s)
 151                         return -ENOMEM;
 152
 153                 s->soc.nr = ops->first + i;
 154                 s->soc.clk = clk;
 155
 156                 soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
 157                 s->dev = dev;
 158                 if (s->soc.nr) {
 159                         s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
 160                         s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
 161                         s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
 162                         s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
 163                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
 164                 } else {
 165                         s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
 166                         s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
 167                         s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
 168                         s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
 169                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
 170                 }
 171
 172                 ret = add(&s->soc);
 173                 if (ret == 0) {
 174                         s->next = dev_get_drvdata(&dev->dev);
 175                         dev_set_drvdata(&dev->dev, s);
 176                 } else
 177                         kfree(s);
 178         }
 179
 180         return ret;
 181 }
 182
 183 static int pcmcia_probe(struct sa1111_dev *dev)
 184 {
 185         void __iomem *base;
 186         int ret;
 187
 188         ret = sa1111_enable_device(dev);
 189         if (ret)
 190                 return ret;
 191
 192         dev_set_drvdata(&dev->dev, NULL);
 193
 194         if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
 195                 sa1111_disable_device(dev);
 196                 return -EBUSY;
 197         }
 198
 199         base = dev->mapbase;
 200
 201         /*
 202          * Initialise the suspend state.
 203          */
 204         sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
 205         sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
 206
 207         ret = -ENODEV;
 208 #ifdef CONFIG_SA1100_BADGE4
 209         if (machine_is_badge4())
 210                 ret = pcmcia_badge4_init(dev);
 211 #endif
 212 #ifdef CONFIG_SA1100_JORNADA720
 213         if (machine_is_jornada720())
 214                 ret = pcmcia_jornada720_init(dev);
 215 #endif
 216 #ifdef CONFIG_ARCH_LUBBOCK
 217         if (machine_is_lubbock())
 218                 ret = pcmcia_lubbock_init(dev);
 219 #endif
 220 #ifdef CONFIG_ASSABET_NEPONSET
 221         if (machine_is_assabet())
 222                 ret = pcmcia_neponset_init(dev);
 223 #endif
 224
 225         if (ret) {
 226                 release_mem_region(dev->res.start, 512);
 227                 sa1111_disable_device(dev);
 228         }
 229
 230         return ret;
 231 }
 232
 233 static int pcmcia_remove(struct sa1111_dev *dev)
 234 {
 235         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 236
 237         dev_set_drvdata(&dev->dev, NULL);
 238
 239         for (; s; s = next) {
 240                 next = s->next;
 241                 soc_pcmcia_remove_one(&s->soc);
 242                 kfree(s);
 243         }
 244
 245         release_mem_region(dev->res.start, 512);
 246         sa1111_disable_device(dev);
 247         return 0;
 248 }
 249
 250 static struct sa1111_driver pcmcia_driver = {
 251         .drv = {
 252                 .name   = "sa1111-pcmcia",
 253         },
 254         .devid          = SA1111_DEVID_PCMCIA,
 255         .probe          = pcmcia_probe,
 256         .remove         = pcmcia_remove,
 257 };
 258
 259 static int __init sa1111_drv_pcmcia_init(void)
 260 {
 261         return sa1111_driver_register(&pcmcia_driver);
 262 }
 263
 264 static void __exit sa1111_drv_pcmcia_exit(void)
 265 {
 266         sa1111_driver_unregister(&pcmcia_driver);
 267 }
 268
 269 fs_initcall(sa1111_drv_pcmcia_init);
 270 module_exit(sa1111_drv_pcmcia_exit);
 271
 272 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 273 MODULE_LICENSE("GPL");