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 #define NUM_IRQS                (6)
  67
  68 void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  69 {
  70         struct sa1111_pcmcia_socket *s = to_skt(skt);
  71         u32 status = readl_relaxed(s->dev->mapbase + PCSR);
  72
  73         switch (skt->nr) {
  74         case 0:
  75                 state->detect = status & PCSR_S0_DETECT ? 0 : 1;
  76                 state->ready  = status & PCSR_S0_READY  ? 1 : 0;
  77                 state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
  78                 state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
  79                 state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
  80                 state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
  81                 state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
  82                 break;
  83
  84         case 1:
  85                 state->detect = status & PCSR_S1_DETECT ? 0 : 1;
  86                 state->ready  = status & PCSR_S1_READY  ? 1 : 0;
  87                 state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
  88                 state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
  89                 state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
  90                 state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
  91                 state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
  92                 break;
  93         }
  94 }
  95
  96 int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  97 {
  98         struct sa1111_pcmcia_socket *s = to_skt(skt);
  99         u32 pccr_skt_mask, pccr_set_mask, val;
 100         unsigned long flags;
 101
 102         switch (skt->nr) {
 103         case 0:
 104                 pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
 105                 break;
 106
 107         case 1:
 108                 pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
 109                 break;
 110
 111         default:
 112                 return -1;
 113         }
 114
 115         pccr_set_mask = 0;
 116
 117         if (state->Vcc != 0)
 118                 pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
 119         if (state->Vcc == 50)
 120                 pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
 121         if (state->flags & SS_RESET)
 122                 pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
 123         if (state->flags & SS_OUTPUT_ENA)
 124                 pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;
 125
 126         local_irq_save(flags);
 127         val = readl_relaxed(s->dev->mapbase + PCCR);
 128         val &= ~pccr_skt_mask;
 129         val |= pccr_set_mask & pccr_skt_mask;
 130         writel_relaxed(val, s->dev->mapbase + PCCR);
 131         local_irq_restore(flags);
 132
 133         return 0;
 134 }
 135
 136 int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
 137         int (*add)(struct soc_pcmcia_socket *))
 138 {
 139         struct sa1111_pcmcia_socket *s;
 140         struct clk *clk;
 141         int i, ret = 0, irqs[NUM_IRQS];
 142
 143         clk = devm_clk_get(&dev->dev, NULL);
 144         if (IS_ERR(clk))
 145                 return PTR_ERR(clk);
 146
 147         for (i = 0; i < NUM_IRQS; i++) {
 148                 irqs[i] = sa1111_get_irq(dev, i);
 149                 if (irqs[i] <= 0)
 150                         return irqs[i] ? : -ENXIO;
 151         }
 152
 153         ops->socket_state = sa1111_pcmcia_socket_state;
 154
 155         for (i = 0; i < ops->nr; i++) {
 156                 s = kzalloc(sizeof(*s), GFP_KERNEL);
 157                 if (!s)
 158                         return -ENOMEM;
 159
 160                 s->soc.nr = ops->first + i;
 161                 s->soc.clk = clk;
 162
 163                 soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
 164                 s->dev = dev;
 165                 if (s->soc.nr) {
 166                         s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
 167                         s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
 168                         s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
 169                         s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
 170                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
 171                 } else {
 172                         s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
 173                         s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
 174                         s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
 175                         s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
 176                         s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
 177                 }
 178
 179                 ret = add(&s->soc);
 180                 if (ret == 0) {
 181                         s->next = dev_get_drvdata(&dev->dev);
 182                         dev_set_drvdata(&dev->dev, s);
 183                 } else
 184                         kfree(s);
 185         }
 186
 187         return ret;
 188 }
 189
 190 static int pcmcia_probe(struct sa1111_dev *dev)
 191 {
 192         void __iomem *base;
 193         int ret;
 194
 195         ret = sa1111_enable_device(dev);
 196         if (ret)
 197                 return ret;
 198
 199         dev_set_drvdata(&dev->dev, NULL);
 200
 201         if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
 202                 sa1111_disable_device(dev);
 203                 return -EBUSY;
 204         }
 205
 206         base = dev->mapbase;
 207
 208         /*
 209          * Initialise the suspend state.
 210          */
 211         writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
 212         writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);
 213
 214         ret = -ENODEV;
 215 #ifdef CONFIG_SA1100_BADGE4
 216         if (machine_is_badge4())
 217                 ret = pcmcia_badge4_init(dev);
 218 #endif
 219 #ifdef CONFIG_SA1100_JORNADA720
 220         if (machine_is_jornada720())
 221                 ret = pcmcia_jornada720_init(dev);
 222 #endif
 223 #ifdef CONFIG_ARCH_LUBBOCK
 224         if (machine_is_lubbock())
 225                 ret = pcmcia_lubbock_init(dev);
 226 #endif
 227 #ifdef CONFIG_ASSABET_NEPONSET
 228         if (machine_is_assabet())
 229                 ret = pcmcia_neponset_init(dev);
 230 #endif
 231
 232         if (ret) {
 233                 release_mem_region(dev->res.start, 512);
 234                 sa1111_disable_device(dev);
 235         }
 236
 237         return ret;
 238 }
 239
 240 static int pcmcia_remove(struct sa1111_dev *dev)
 241 {
 242         struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);
 243
 244         dev_set_drvdata(&dev->dev, NULL);
 245
 246         for (; s; s = next) {
 247                 next = s->next;
 248                 soc_pcmcia_remove_one(&s->soc);
 249                 kfree(s);
 250         }
 251
 252         release_mem_region(dev->res.start, 512);
 253         sa1111_disable_device(dev);
 254         return 0;
 255 }
 256
 257 static struct sa1111_driver pcmcia_driver = {
 258         .drv = {
 259                 .name   = "sa1111-pcmcia",
 260         },
 261         .devid          = SA1111_DEVID_PCMCIA,
 262         .probe          = pcmcia_probe,
 263         .remove         = pcmcia_remove,
 264 };
 265
 266 static int __init sa1111_drv_pcmcia_init(void)
 267 {
 268         return sa1111_driver_register(&pcmcia_driver);
 269 }
 270
 271 static void __exit sa1111_drv_pcmcia_exit(void)
 272 {
 273         sa1111_driver_unregister(&pcmcia_driver);
 274 }
 275
 276 fs_initcall(sa1111_drv_pcmcia_init);
 277 module_exit(sa1111_drv_pcmcia_exit);
 278
 279 MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
 280 MODULE_LICENSE("GPL");