target/linux/mpc83xx/patches-2.6.36/017-platforms_83xx_rbppc.patch

   1 --- /dev/null
   2 +++ b/arch/powerpc/platforms/83xx/rbppc.c
   3 @@ -0,0 +1,316 @@
   4 +/*
   5 + * Copyright (C) 2008-2009 Noah Fontes <nfontes@transtruct.org>
   6 + * Copyright (C) 2009 Michael Guntsche <mike@it-loops.com>
   7 + * Copyright (C) Mikrotik 2007
   8 + *
   9 + * This program is free software; you can redistribute it and/or modify it
  10 + * under the terms of the GNU General Public License as published by the
  11 + * Free Software Foundation; either version 2 of the License, or (at your
  12 + * option) any later version.
  13 + */
  14 +
  15 +#include <linux/delay.h>
  16 +#include <linux/root_dev.h>
  17 +#include <linux/initrd.h>
  18 +#include <linux/interrupt.h>
  19 +#include <linux/of_platform.h>
  20 +#include <linux/of_device.h>
  21 +#include <linux/of_platform.h>
  22 +#include <asm/time.h>
  23 +#include <asm/ipic.h>
  24 +#include <asm/udbg.h>
  25 +#include <asm/qe.h>
  26 +#include <asm/qe_ic.h>
  27 +#include <sysdev/fsl_soc.h>
  28 +#include <sysdev/fsl_pci.h>
  29 +#include "mpc83xx.h"
  30 +
  31 +#define SYSCTL         0x100
  32 +#define SICRL          0x014
  33 +
  34 +#define GTCFR2         0x04
  35 +#define GTMDR4         0x22
  36 +#define GTRFR4         0x26
  37 +#define GTCNR4         0x2e
  38 +#define GTVER4         0x36
  39 +#define GTPSR4         0x3e
  40 +
  41 +#define GTCFR_BCM      0x40
  42 +#define GTCFR_STP4     0x20
  43 +#define GTCFR_RST4     0x10
  44 +#define GTCFR_STP3     0x02
  45 +#define GTCFR_RST3     0x01
  46 +
  47 +#define GTMDR_ORI      0x10
  48 +#define GTMDR_FRR      0x08
  49 +#define GTMDR_ICLK16   0x04
  50 +
  51 +extern int par_io_data_set(u8 port, u8 pin, u8 val);
  52 +extern int par_io_config_pin(u8 port, u8 pin, int dir, int open_drain,
  53 +                            int assignment, int has_irq);
  54 +
  55 +static unsigned timer_freq;
  56 +static void *gtm;
  57 +
  58 +static int beeper_irq;
  59 +static unsigned beeper_gpio_pin[2];
  60 +
  61 +irqreturn_t rbppc_timer_irq(int irq, void *ptr)
  62 +{
  63 +       static int toggle = 0;
  64 +
  65 +       par_io_data_set(beeper_gpio_pin[0], beeper_gpio_pin[1], toggle);
  66 +       toggle = !toggle;
  67 +
  68 +       /* ack interrupt */
  69 +       out_be16(gtm + GTVER4, 3);
  70 +
  71 +       return IRQ_HANDLED;
  72 +}
  73 +
  74 +void rbppc_beep(unsigned freq)
  75 +{
  76 +       unsigned gtmdr;
  77 +
  78 +       if (freq > 5000) freq = 5000;
  79 +
  80 +       if (!gtm)
  81 +               return;
  82 +       if (!freq) {
  83 +               out_8(gtm + GTCFR2, GTCFR_STP4 | GTCFR_STP3);
  84 +               return;
  85 +       }
  86 +
  87 +       out_8(gtm + GTCFR2, GTCFR_RST4 | GTCFR_STP3);
  88 +       out_be16(gtm + GTPSR4, 255);
  89 +       gtmdr = GTMDR_FRR | GTMDR_ICLK16;
  90 +       if (beeper_irq != NO_IRQ) gtmdr |= GTMDR_ORI;
  91 +       out_be16(gtm + GTMDR4, gtmdr);
  92 +       out_be16(gtm + GTVER4, 3);
  93 +
  94 +       out_be16(gtm + GTRFR4, timer_freq / 16 / 256 / freq / 2);
  95 +       out_be16(gtm + GTCNR4, 0);
  96 +}
  97 +EXPORT_SYMBOL(rbppc_beep);
  98 +
  99 +static void __init rbppc_setup_arch(void)
 100 +{
 101 +       struct device_node *np;
 102 +
 103 +       np = of_find_node_by_type(NULL, "cpu");
 104 +       if (np) {
 105 +               const unsigned *fp = of_get_property(np, "clock-frequency", NULL);
 106 +               loops_per_jiffy = fp ? *fp / HZ : 0;
 107 +
 108 +               of_node_put(np);
 109 +       }
 110 +
 111 +       np = of_find_node_by_name(NULL, "serial");
 112 +       if (np) {
 113 +               timer_freq =
 114 +                   *(unsigned *) of_get_property(np, "clock-frequency", NULL);
 115 +               of_node_put(np);
 116 +       }
 117 +
 118 +#ifdef CONFIG_PCI
 119 +       np = of_find_node_by_type(NULL, "pci");
 120 +       if (np) {
 121 +               mpc83xx_add_bridge(np);
 122 +       }
 123 +#endif
 124 +
 125 +#ifdef CONFIG_QUICC_ENGINE
 126 +       np = of_find_node_by_name(np, "par_io");
 127 +       if (np) {
 128 +               qe_reset();
 129 +               par_io_init(np);
 130 +               of_node_put(np);
 131 +
 132 +               np = NULL;
 133 +               while (1) {
 134 +                       np = of_find_node_by_name(np, "ucc");
 135 +                       if (!np) break;
 136 +
 137 +                       par_io_of_config(np);
 138 +               }
 139 +       }
 140 +#endif
 141 +
 142 +}
 143 +
 144 +void __init rbppc_init_IRQ(void)
 145 +{
 146 +       struct device_node *np;
 147 +
 148 +       np = of_find_node_by_type(NULL, "ipic");
 149 +       if (np) {
 150 +               ipic_init(np, 0);
 151 +               ipic_set_default_priority();
 152 +               of_node_put(np);
 153 +       }
 154 +
 155 +#ifdef CONFIG_QUICC_ENGINE
 156 +       np = of_find_node_by_type(NULL, "qeic");
 157 +       if (np) {
 158 +               qe_ic_init(np, 0, qe_ic_cascade_low_ipic, qe_ic_cascade_high_ipic);
 159 +               of_node_put(np);
 160 +       }
 161 +#endif
 162 +}
 163 +
 164 +static int __init rbppc_probe(void)
 165 +{
 166 +       char *model;
 167 +
 168 +       model = of_get_flat_dt_prop(of_get_flat_dt_root(), "model", NULL);
 169 +
 170 +       if (!model)
 171 +               return 0;
 172 +
 173 +       if (strcmp(model, "RB600") == 0)
 174 +               return 1;
 175 +
 176 +       return 0;
 177 +}
 178 +
 179 +static void __init rbppc_beeper_init(struct device_node *beeper)
 180 +{
 181 +       struct resource res;
 182 +       struct device_node *gpio;
 183 +       const unsigned *pin;
 184 +       const unsigned *gpio_id;
 185 +
 186 +       if (of_address_to_resource(beeper, 0, &res)) {
 187 +               printk(KERN_ERR "rbppc_beeper_init(%s): Beeper error: No region specified\n", beeper->full_name);
 188 +               return;
 189 +       }
 190 +
 191 +       pin = of_get_property(beeper, "gpio", NULL);
 192 +       if (pin) {
 193 +               gpio = of_find_node_by_phandle(pin[0]);
 194 +
 195 +               if (!gpio) {
 196 +                       printk(KERN_ERR "rbppc_beeper_init(%s): Beeper error: GPIO handle %x not found\n", beeper->full_name, pin[0]);
 197 +                       return;
 198 +               }
 199 +
 200 +               gpio_id = of_get_property(gpio, "device-id", NULL);
 201 +               if (!gpio_id) {
 202 +                       printk(KERN_ERR "rbppc_beeper_init(%s): Beeper error: No device-id specified in GPIO\n", beeper->full_name);
 203 +                       return;
 204 +               }
 205 +
 206 +               beeper_gpio_pin[0] = *gpio_id;
 207 +               beeper_gpio_pin[1] = pin[1];
 208 +
 209 +               par_io_config_pin(*gpio_id, pin[1], 1, 0, 0, 0);
 210 +       } else {
 211 +               void *sysctl;
 212 +
 213 +               sysctl = ioremap_nocache(get_immrbase() + SYSCTL, 0x100);
 214 +               out_be32(sysctl + SICRL,
 215 +                        in_be32(sysctl + SICRL) | (1 << (31 - 19)));
 216 +               iounmap(sysctl);
 217 +       }
 218 +
 219 +       gtm = ioremap_nocache(res.start, res.end - res.start + 1);
 220 +
 221 +       beeper_irq = irq_of_parse_and_map(beeper, 0);
 222 +       if (beeper_irq != NO_IRQ) {
 223 +               int e = request_irq(beeper_irq, rbppc_timer_irq, 0, "beeper", NULL);
 224 +               if (e) {
 225 +                       printk(KERN_ERR "rbppc_beeper_init(%s): Request of beeper irq failed!\n", beeper->full_name);
 226 +               }
 227 +       }
 228 +}
 229 +
 230 +#define SBIT(x) (0x80000000 >> (x))
 231 +#define DBIT(x, y) ((y) << (32 - (((x % 16) + 1) * 2)))
 232 +
 233 +#define SICRL_RB600(x) ((x) + (0x114 >> 2))
 234 +#define GPIO_DIR_RB600(x) ((x) + (0xc00 >> 2))
 235 +#define GPIO_DATA_RB600(x) ((x) + (0xc08 >> 2))
 236 +
 237 +static void rbppc_restart(char *cmd)
 238 +{
 239 +       __be32 __iomem *reg;
 240 +
 241 +       reg = ioremap(get_immrbase(), 0x1000);
 242 +       local_irq_disable();
 243 +       out_be32(SICRL_RB600(reg), in_be32(SICRL_RB600(reg)) & ~0x00800000);
 244 +       out_be32(GPIO_DIR_RB600(reg), in_be32(GPIO_DIR_RB600(reg)) | SBIT(2));
 245 +       out_be32(GPIO_DATA_RB600(reg), in_be32(GPIO_DATA_RB600(reg)) & ~SBIT(2));
 246 +
 247 +       while (1);
 248 +}
 249 +
 250 +static void rbppc_halt(void)
 251 +{
 252 +       while (1);
 253 +}
 254 +
 255 +static struct of_device_id rbppc_ids[] = {
 256 +       { .type = "soc", },
 257 +       { .compatible = "soc", },
 258 +       { .compatible = "simple-bus", },
 259 +       { .compatible = "gianfar", },
 260 +       { },
 261 +};
 262 +
 263 +static int __init rbppc_declare_of_platform_devices(void)
 264 +{
 265 +       struct device_node *np;
 266 +       unsigned idx;
 267 +
 268 +       of_platform_bus_probe(NULL, rbppc_ids, NULL);
 269 +
 270 +       np = of_find_node_by_type(NULL, "mdio");
 271 +       if (np) {
 272 +               unsigned len;
 273 +               unsigned *res;
 274 +               const unsigned *eres;
 275 +               struct device_node *ep;
 276 +
 277 +               ep = of_find_compatible_node(NULL, "network", "ucc_geth");
 278 +               if (ep) {
 279 +                       eres = of_get_property(ep, "reg", &len);
 280 +                       res = (unsigned *) of_get_property(np, "reg", &len);
 281 +                       if (res && eres) {
 282 +                               res[0] = eres[0] + 0x120;
 283 +                       }
 284 +               }
 285 +       }
 286 +
 287 +       np = of_find_node_by_name(NULL, "nand");
 288 +       if (np) {
 289 +               of_platform_device_create(np, "nand", NULL);
 290 +       }
 291 +
 292 +       idx = 0;
 293 +       for_each_node_by_type(np, "rb,cf") {
 294 +               char dev_name[12];
 295 +               snprintf(dev_name, sizeof(dev_name), "cf.%u", idx);
 296 +               of_platform_device_create(np, dev_name, NULL);
 297 +               ++idx;
 298 +       }
 299 +
 300 +       np = of_find_node_by_name(NULL, "beeper");
 301 +       if (np) {
 302 +               rbppc_beeper_init(np);
 303 +       }
 304 +
 305 +       return 0;
 306 +}
 307 +device_initcall(rbppc_declare_of_platform_devices);
 308 +
 309 +define_machine(rb600) {
 310 +       .name                           = "MikroTik RouterBOARD 600 series",
 311 +       .probe                          = rbppc_probe,
 312 +       .setup_arch                     = rbppc_setup_arch,
 313 +       .init_IRQ                       = rbppc_init_IRQ,
 314 +       .get_irq                        = ipic_get_irq,
 315 +       .restart                        = rbppc_restart,
 316 +       .halt                           = rbppc_halt,
 317 +       .time_init                      = mpc83xx_time_init,
 318 +       .calibrate_decr                 = generic_calibrate_decr,
 319 +};