target/linux/brcm47xx/patches-3.0/0010-bcm47xx-prepare-to-support-different-buses.patch

   1 From c0886db6357de20fba4f7c0602eceefba3ad343b Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Mon, 6 Jun 2011 00:07:36 +0200
   4 Subject: [PATCH 10/14] bcm47xx: prepare to support different buses
   5
   6 The ssb bus is not hod directly any more. there is now a union which
   7 contains all the supported buses, now just ssb. As just one system bus
   8 can be used at a time the union does not cause any problems.
   9
  10 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  11 ---
  12  arch/mips/bcm47xx/gpio.c                     |   56 ++++++++++++++++----------
  13  arch/mips/bcm47xx/nvram.c                    |   15 +++++--
  14  arch/mips/bcm47xx/serial.c                   |   13 +++++-
  15  arch/mips/bcm47xx/setup.c                    |   32 +++++++++++---
  16  arch/mips/bcm47xx/time.c                     |    9 +++-
  17  arch/mips/bcm47xx/wgt634u.c                  |   13 ++++--
  18  arch/mips/include/asm/mach-bcm47xx/bcm47xx.h |   14 ++++++-
  19  arch/mips/include/asm/mach-bcm47xx/gpio.h    |   55 ++++++++++++++++++-------
  20  drivers/watchdog/bcm47xx_wdt.c               |   12 +++++-
  21  9 files changed, 158 insertions(+), 61 deletions(-)
  22
  23 --- a/arch/mips/bcm47xx/gpio.c
  24 +++ b/arch/mips/bcm47xx/gpio.c
  25 @@ -20,42 +20,54 @@ static DECLARE_BITMAP(gpio_in_use, BCM47
  26
  27  int gpio_request(unsigned gpio, const char *tag)
  28  {
  29 -       if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
  30 -           ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
  31 -               return -EINVAL;
  32 -
  33 -       if (ssb_extif_available(&ssb_bcm47xx.extif) &&
  34 -           ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
  35 -               return -EINVAL;
  36 -
  37 -       if (test_and_set_bit(gpio, gpio_in_use))
  38 -               return -EBUSY;
  39 -
  40 -       return 0;
  41 +       switch (bcm47xx_active_bus_type) {
  42 +       case BCM47XX_BUS_TYPE_SSB:
  43 +               if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
  44 +                   ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
  45 +                       return -EINVAL;
  46 +
  47 +               if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
  48 +                   ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
  49 +                       return -EINVAL;
  50 +
  51 +               if (test_and_set_bit(gpio, gpio_in_use))
  52 +                       return -EBUSY;
  53 +
  54 +               return 0;
  55 +       }
  56 +       return -EINVAL;
  57  }
  58  EXPORT_SYMBOL(gpio_request);
  59
  60  void gpio_free(unsigned gpio)
  61  {
  62 -       if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
  63 -           ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
  64 -               return;
  65 +       switch (bcm47xx_active_bus_type) {
  66 +       case BCM47XX_BUS_TYPE_SSB:
  67 +               if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
  68 +                   ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
  69 +                       return;
  70 +
  71 +               if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
  72 +                   ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
  73 +                       return;
  74
  75 -       if (ssb_extif_available(&ssb_bcm47xx.extif) &&
  76 -           ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
  77 +               clear_bit(gpio, gpio_in_use);
  78                 return;
  79 -
  80 -       clear_bit(gpio, gpio_in_use);
  81 +       }
  82  }
  83  EXPORT_SYMBOL(gpio_free);
  84
  85  int gpio_to_irq(unsigned gpio)
  86  {
  87 -       if (ssb_chipco_available(&ssb_bcm47xx.chipco))
  88 -               return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
  89 -       else if (ssb_extif_available(&ssb_bcm47xx.extif))
  90 -               return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
  91 -       else
  92 -               return -EINVAL;
  93 +       switch (bcm47xx_active_bus_type) {
  94 +       case BCM47XX_BUS_TYPE_SSB:
  95 +               if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco))
  96 +                       return ssb_mips_irq(bcm47xx_bus.ssb.chipco.dev) + 2;
  97 +               else if (ssb_extif_available(&bcm47xx_bus.ssb.extif))
  98 +                       return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
  99 +               else
 100 +                       return -EINVAL;
 101 +       }
 102 +       return -EINVAL;
 103  }
 104  EXPORT_SYMBOL_GPL(gpio_to_irq);
 105 --- a/arch/mips/bcm47xx/nvram.c
 106 +++ b/arch/mips/bcm47xx/nvram.c
 107 @@ -26,14 +26,21 @@ static char nvram_buf[NVRAM_SPACE];
 108  /* Probe for NVRAM header */
 109  static void early_nvram_init(void)
 110  {
 111 -       struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
 112 +       struct ssb_mipscore *mcore_ssb;
 113         struct nvram_header *header;
 114         int i;
 115 -       u32 base, lim, off;
 116 +       u32 base = 0;
 117 +       u32 lim = 0;
 118 +       u32 off;
 119         u32 *src, *dst;
 120
 121 -       base = mcore->flash_window;
 122 -       lim = mcore->flash_window_size;
 123 +       switch (bcm47xx_active_bus_type) {
 124 +       case BCM47XX_BUS_TYPE_SSB:
 125 +               mcore_ssb = &bcm47xx_bus.ssb.mipscore;
 126 +               base = mcore_ssb->flash_window;
 127 +               lim = mcore_ssb->flash_window_size;
 128 +               break;
 129 +       }
 130
 131         off = FLASH_MIN;
 132         while (off <= lim) {
 133 --- a/arch/mips/bcm47xx/serial.c
 134 +++ b/arch/mips/bcm47xx/serial.c
 135 @@ -23,10 +23,10 @@ static struct platform_device uart8250_d
 136         },
 137  };
 138
 139 -static int __init uart8250_init(void)
 140 +static int __init uart8250_init_ssb(void)
 141  {
 142         int i;
 143 -       struct ssb_mipscore *mcore = &(ssb_bcm47xx.mipscore);
 144 +       struct ssb_mipscore *mcore = &(bcm47xx_bus.ssb.mipscore);
 145
 146         memset(&uart8250_data, 0,  sizeof(uart8250_data));
 147
 148 @@ -45,6 +45,15 @@ static int __init uart8250_init(void)
 149         return platform_device_register(&uart8250_device);
 150  }
 151
 152 +static int __init uart8250_init(void)
 153 +{
 154 +       switch (bcm47xx_active_bus_type) {
 155 +       case BCM47XX_BUS_TYPE_SSB:
 156 +               return uart8250_init_ssb();
 157 +       }
 158 +       return -EINVAL;
 159 +}
 160 +
 161  module_init(uart8250_init);
 162
 163  MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
 164 --- a/arch/mips/bcm47xx/setup.c
 165 +++ b/arch/mips/bcm47xx/setup.c
 166 @@ -35,15 +35,22 @@
 167  #include <bcm47xx.h>
 168  #include <asm/mach-bcm47xx/nvram.h>
 169
 170 -struct ssb_bus ssb_bcm47xx;
 171 -EXPORT_SYMBOL(ssb_bcm47xx);
 172 +union bcm47xx_bus bcm47xx_bus;
 173 +EXPORT_SYMBOL(bcm47xx_bus);
 174 +
 175 +enum bcm47xx_bus_type bcm47xx_active_bus_type;
 176 +EXPORT_SYMBOL(bcm47xx_active_bus_type);
 177
 178  static void bcm47xx_machine_restart(char *command)
 179  {
 180         printk(KERN_ALERT "Please stand by while rebooting the system...\n");
 181         local_irq_disable();
 182         /* Set the watchdog timer to reset immediately */
 183 -       ssb_watchdog_timer_set(&ssb_bcm47xx, 1);
 184 +       switch (bcm47xx_active_bus_type) {
 185 +       case BCM47XX_BUS_TYPE_SSB:
 186 +               ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
 187 +               break;
 188 +       }
 189         while (1)
 190                 cpu_relax();
 191  }
 192 @@ -52,7 +59,11 @@ static void bcm47xx_machine_halt(void)
 193  {
 194         /* Disable interrupts and watchdog and spin forever */
 195         local_irq_disable();
 196 -       ssb_watchdog_timer_set(&ssb_bcm47xx, 0);
 197 +       switch (bcm47xx_active_bus_type) {
 198 +       case BCM47XX_BUS_TYPE_SSB:
 199 +               ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
 200 +               break;
 201 +       }
 202         while (1)
 203                 cpu_relax();
 204  }
 205 @@ -247,7 +258,7 @@ static int bcm47xx_get_invariants(struct
 206         return 0;
 207  }
 208
 209 -void __init plat_mem_setup(void)
 210 +static void __init bcm47xx_register_ssb(void)
 211  {
 212         int err;
 213         char buf[100];
 214 @@ -258,12 +269,12 @@ void __init plat_mem_setup(void)
 215                 printk(KERN_WARNING "bcm47xx: someone else already registered"
 216                         " a ssb SPROM callback handler (err %d)\n", err);
 217
 218 -       err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE,
 219 +       err = ssb_bus_ssbbus_register(&(bcm47xx_bus.ssb), SSB_ENUM_BASE,
 220                                       bcm47xx_get_invariants);
 221         if (err)
 222                 panic("Failed to initialize SSB bus (err %d)\n", err);
 223
 224 -       mcore = &ssb_bcm47xx.mipscore;
 225 +       mcore = &bcm47xx_bus.ssb.mipscore;
 226         if (nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) {
 227                 if (strstr(buf, "console=ttyS1")) {
 228                         struct ssb_serial_port port;
 229 @@ -276,6 +287,14 @@ void __init plat_mem_setup(void)
 230                         memcpy(&mcore->serial_ports[1], &port, sizeof(port));
 231                 }
 232         }
 233 +}
 234 +
 235 +void __init plat_mem_setup(void)
 236 +{
 237 +       struct cpuinfo_mips *c = &current_cpu_data;
 238 +
 239 +       bcm47xx_active_bus_type = BCM47XX_BUS_TYPE_SSB;
 240 +       bcm47xx_register_ssb();
 241
 242         _machine_restart = bcm47xx_machine_restart;
 243         _machine_halt = bcm47xx_machine_halt;
 244 --- a/arch/mips/bcm47xx/time.c
 245 +++ b/arch/mips/bcm47xx/time.c
 246 @@ -30,7 +30,7 @@
 247
 248  void __init plat_time_init(void)
 249  {
 250 -       unsigned long hz;
 251 +       unsigned long hz = 0;
 252
 253         /*
 254          * Use deterministic values for initial counter interrupt
 255 @@ -39,7 +39,12 @@ void __init plat_time_init(void)
 256         write_c0_count(0);
 257         write_c0_compare(0xffff);
 258
 259 -       hz = ssb_cpu_clock(&ssb_bcm47xx.mipscore) / 2;
 260 +       switch (bcm47xx_active_bus_type) {
 261 +       case BCM47XX_BUS_TYPE_SSB:
 262 +               hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2;
 263 +               break;
 264 +       }
 265 +
 266         if (!hz)
 267                 hz = 100000000;
 268
 269 --- a/arch/mips/bcm47xx/wgt634u.c
 270 +++ b/arch/mips/bcm47xx/wgt634u.c
 271 @@ -108,7 +108,7 @@ static irqreturn_t gpio_interrupt(int ir
 272
 273         /* Interrupts are shared, check if the current one is
 274            a GPIO interrupt. */
 275 -       if (!ssb_chipco_irq_status(&ssb_bcm47xx.chipco,
 276 +       if (!ssb_chipco_irq_status(&bcm47xx_bus.ssb.chipco,
 277                                    SSB_CHIPCO_IRQ_GPIO))
 278                 return IRQ_NONE;
 279
 280 @@ -133,21 +133,24 @@ static int __init wgt634u_init(void)
 281          * been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx.
 282          */
 283
 284 -       u8 *et0mac = ssb_bcm47xx.sprom.et0mac;
 285 +       if (bcm47xx_active_bus_type != BCM47XX_BUS_TYPE_SSB)
 286 +               return -ENODEV;
 287 +
 288 +       u8 *et0mac = bcm47xx_bus.ssb.sprom.et0mac;
 289
 290         if (et0mac[0] == 0x00 &&
 291             ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
 292              (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) {
 293 -               struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
 294 +               struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore;
 295
 296                 printk(KERN_INFO "WGT634U machine detected.\n");
 297
 298                 if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET),
 299                                  gpio_interrupt, IRQF_SHARED,
 300 -                                "WGT634U GPIO", &ssb_bcm47xx.chipco)) {
 301 +                                "WGT634U GPIO", &bcm47xx_bus.ssb.chipco)) {
 302                         gpio_direction_input(WGT634U_GPIO_RESET);
 303                         gpio_intmask(WGT634U_GPIO_RESET, 1);
 304 -                       ssb_chipco_irq_mask(&ssb_bcm47xx.chipco,
 305 +                       ssb_chipco_irq_mask(&bcm47xx_bus.ssb.chipco,
 306                                             SSB_CHIPCO_IRQ_GPIO,
 307                                             SSB_CHIPCO_IRQ_GPIO);
 308                 }
 309 --- a/arch/mips/include/asm/mach-bcm47xx/bcm47xx.h
 310 +++ b/arch/mips/include/asm/mach-bcm47xx/bcm47xx.h
 311 @@ -19,7 +19,17 @@
 312  #ifndef __ASM_BCM47XX_H
 313  #define __ASM_BCM47XX_H
 314
 315 -/* SSB bus */
 316 -extern struct ssb_bus ssb_bcm47xx;
 317 +#include <linux/ssb/ssb.h>
 318 +
 319 +enum bcm47xx_bus_type {
 320 +       BCM47XX_BUS_TYPE_SSB,
 321 +};
 322 +
 323 +union bcm47xx_bus {
 324 +       struct ssb_bus ssb;
 325 +};
 326 +
 327 +extern union bcm47xx_bus bcm47xx_bus;
 328 +extern enum bcm47xx_bus_type bcm47xx_active_bus_type;
 329
 330  #endif /* __ASM_BCM47XX_H */
 331 --- a/arch/mips/include/asm/mach-bcm47xx/gpio.h
 332 +++ b/arch/mips/include/asm/mach-bcm47xx/gpio.h
 333 @@ -21,41 +21,66 @@ extern int gpio_to_irq(unsigned gpio);
 334
 335  static inline int gpio_get_value(unsigned gpio)
 336  {
 337 -       return ssb_gpio_in(&ssb_bcm47xx, 1 << gpio);
 338 +       switch (bcm47xx_active_bus_type) {
 339 +       case BCM47XX_BUS_TYPE_SSB:
 340 +               return ssb_gpio_in(&bcm47xx_bus.ssb, 1 << gpio);
 341 +       }
 342 +       return -EINVAL;
 343  }
 344
 345  static inline void gpio_set_value(unsigned gpio, int value)
 346  {
 347 -       ssb_gpio_out(&ssb_bcm47xx, 1 << gpio, value ? 1 << gpio : 0);
 348 +       switch (bcm47xx_active_bus_type) {
 349 +       case BCM47XX_BUS_TYPE_SSB:
 350 +               ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
 351 +                            value ? 1 << gpio : 0);
 352 +       }
 353  }
 354
 355  static inline int gpio_direction_input(unsigned gpio)
 356  {
 357 -       ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 0);
 358 -       return 0;
 359 +       switch (bcm47xx_active_bus_type) {
 360 +       case BCM47XX_BUS_TYPE_SSB:
 361 +               ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 0);
 362 +               return 0;
 363 +       }
 364 +       return -EINVAL;
 365  }
 366
 367  static inline int gpio_direction_output(unsigned gpio, int value)
 368  {
 369 -       /* first set the gpio out value */
 370 -       ssb_gpio_out(&ssb_bcm47xx, 1 << gpio, value ? 1 << gpio : 0);
 371 -       /* then set the gpio mode */
 372 -       ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 1 << gpio);
 373 -       return 0;
 374 +       switch (bcm47xx_active_bus_type) {
 375 +       case BCM47XX_BUS_TYPE_SSB:
 376 +               /* first set the gpio out value */
 377 +               ssb_gpio_out(&bcm47xx_bus.ssb, 1 << gpio,
 378 +                            value ? 1 << gpio : 0);
 379 +               /* then set the gpio mode */
 380 +               ssb_gpio_outen(&bcm47xx_bus.ssb, 1 << gpio, 1 << gpio);
 381 +               return 0;
 382 +       }
 383 +       return -EINVAL;
 384  }
 385
 386  static inline int gpio_intmask(unsigned gpio, int value)
 387  {
 388 -       ssb_gpio_intmask(&ssb_bcm47xx, 1 << gpio,
 389 -                        value ? 1 << gpio : 0);
 390 -       return 0;
 391 +       switch (bcm47xx_active_bus_type) {
 392 +       case BCM47XX_BUS_TYPE_SSB:
 393 +               ssb_gpio_intmask(&bcm47xx_bus.ssb, 1 << gpio,
 394 +                                value ? 1 << gpio : 0);
 395 +               return 0;
 396 +       }
 397 +       return -EINVAL;
 398  }
 399
 400  static inline int gpio_polarity(unsigned gpio, int value)
 401  {
 402 -       ssb_gpio_polarity(&ssb_bcm47xx, 1 << gpio,
 403 -                         value ? 1 << gpio : 0);
 404 -       return 0;
 405 +       switch (bcm47xx_active_bus_type) {
 406 +       case BCM47XX_BUS_TYPE_SSB:
 407 +               ssb_gpio_polarity(&bcm47xx_bus.ssb, 1 << gpio,
 408 +                                 value ? 1 << gpio : 0);
 409 +               return 0;
 410 +       }
 411 +       return -EINVAL;
 412  }
 413
 414
 415 --- a/drivers/watchdog/bcm47xx_wdt.c
 416 +++ b/drivers/watchdog/bcm47xx_wdt.c
 417 @@ -54,12 +54,20 @@ static atomic_t ticks;
 418  static inline void bcm47xx_wdt_hw_start(void)
 419  {
 420         /* this is 2,5s on 100Mhz clock  and 2s on 133 Mhz */
 421 -       ssb_watchdog_timer_set(&ssb_bcm47xx, 0xfffffff);
 422 +       switch (bcm47xx_active_bus_type) {
 423 +       case BCM47XX_BUS_TYPE_SSB:
 424 +               ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0xfffffff);
 425 +               break;
 426 +       }
 427  }
 428
 429  static inline int bcm47xx_wdt_hw_stop(void)
 430  {
 431 -       return ssb_watchdog_timer_set(&ssb_bcm47xx, 0);
 432 +       switch (bcm47xx_active_bus_type) {
 433 +       case BCM47XX_BUS_TYPE_SSB:
 434 +               return ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 0);
 435 +       }
 436 +       return -EINVAL;
 437  }
 438
 439  static void bcm47xx_timer_tick(unsigned long unused)