arch/mips/txx9/rbtx4927/setup.c

   1 /*
   2  * Toshiba rbtx4927 specific setup
   3  *
   4  * Author: MontaVista Software, Inc.
   5  *         source@mvista.com
   6  *
   7  * Copyright 2001-2002 MontaVista Software Inc.
   8  *
   9  * Copyright (C) 1996, 97, 2001, 04  Ralf Baechle (ralf@linux-mips.org)
  10  * Copyright (C) 2000 RidgeRun, Inc.
  11  * Author: RidgeRun, Inc.
  12  *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
  13  *
  14  * Copyright 2001 MontaVista Software Inc.
  15  * Author: jsun@mvista.com or jsun@junsun.net
  16  *
  17  * Copyright 2002 MontaVista Software Inc.
  18  * Author: Michael Pruznick, michael_pruznick@mvista.com
  19  *
  20  * Copyright (C) 2000-2001 Toshiba Corporation
  21  *
  22  * Copyright (C) 2004 MontaVista Software Inc.
  23  * Author: Manish Lachwani, mlachwani@mvista.com
  24  *
  25  *  This program is free software; you can redistribute it and/or modify it
  26  *  under the terms of the GNU General Public License as published by the
  27  *  Free Software Foundation; either version 2 of the License, or (at your
  28  *  option) any later version.
  29  *
  30  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  31  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  32  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  33  *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  34  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  35  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  36  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  37  *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  38  *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  39  *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  40  *
  41  *  You should have received a copy of the GNU General Public License along
  42  *  with this program; if not, write to the Free Software Foundation, Inc.,
  43  *  675 Mass Ave, Cambridge, MA 02139, USA.
  44  */
  45 #include <linux/init.h>
  46 #include <linux/kernel.h>
  47 #include <linux/types.h>
  48 #include <linux/ioport.h>
  49 #include <linux/platform_device.h>
  50 #include <linux/delay.h>
  51 #include <linux/gpio.h>
  52 #include <linux/leds.h>
  53 #include <asm/io.h>
  54 #include <asm/reboot.h>
  55 #include <asm/txx9pio.h>
  56 #include <asm/txx9/generic.h>
  57 #include <asm/txx9/pci.h>
  58 #include <asm/txx9/rbtx4927.h>
  59 #include <asm/txx9/tx4938.h>    /* for TX4937 */
  60
  61 #ifdef CONFIG_PCI
  62 static void __init tx4927_pci_setup(void)
  63 {
  64         int extarb = !(__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCIARB);
  65         struct pci_controller *c = &txx9_primary_pcic;
  66
  67         register_pci_controller(c);
  68
  69         if (__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCI66)
  70                 txx9_pci_option =
  71                         (txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
  72                         TXX9_PCI_OPT_CLK_66; /* already configured */
  73
  74         /* Reset PCI Bus */
  75         writeb(1, rbtx4927_pcireset_addr);
  76         /* Reset PCIC */
  77         txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  78         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  79             TXX9_PCI_OPT_CLK_66)
  80                 tx4927_pciclk66_setup();
  81         mdelay(10);
  82         /* clear PCIC reset */
  83         txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  84         writeb(0, rbtx4927_pcireset_addr);
  85         iob();
  86
  87         tx4927_report_pciclk();
  88         tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
  89         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
  90             TXX9_PCI_OPT_CLK_AUTO &&
  91             txx9_pci66_check(c, 0, 0)) {
  92                 /* Reset PCI Bus */
  93                 writeb(1, rbtx4927_pcireset_addr);
  94                 /* Reset PCIC */
  95                 txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
  96                 tx4927_pciclk66_setup();
  97                 mdelay(10);
  98                 /* clear PCIC reset */
  99                 txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
 100                 writeb(0, rbtx4927_pcireset_addr);
 101                 iob();
 102                 /* Reinitialize PCIC */
 103                 tx4927_report_pciclk();
 104                 tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
 105         }
 106         tx4927_setup_pcierr_irq();
 107 }
 108
 109 static void __init tx4937_pci_setup(void)
 110 {
 111         int extarb = !(__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB);
 112         struct pci_controller *c = &txx9_primary_pcic;
 113
 114         register_pci_controller(c);
 115
 116         if (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66)
 117                 txx9_pci_option =
 118                         (txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
 119                         TXX9_PCI_OPT_CLK_66; /* already configured */
 120
 121         /* Reset PCI Bus */
 122         writeb(1, rbtx4927_pcireset_addr);
 123         /* Reset PCIC */
 124         txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 125         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
 126             TXX9_PCI_OPT_CLK_66)
 127                 tx4938_pciclk66_setup();
 128         mdelay(10);
 129         /* clear PCIC reset */
 130         txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 131         writeb(0, rbtx4927_pcireset_addr);
 132         iob();
 133
 134         tx4938_report_pciclk();
 135         tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
 136         if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
 137             TXX9_PCI_OPT_CLK_AUTO &&
 138             txx9_pci66_check(c, 0, 0)) {
 139                 /* Reset PCI Bus */
 140                 writeb(1, rbtx4927_pcireset_addr);
 141                 /* Reset PCIC */
 142                 txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 143                 tx4938_pciclk66_setup();
 144                 mdelay(10);
 145                 /* clear PCIC reset */
 146                 txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
 147                 writeb(0, rbtx4927_pcireset_addr);
 148                 iob();
 149                 /* Reinitialize PCIC */
 150                 tx4938_report_pciclk();
 151                 tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
 152         }
 153         tx4938_setup_pcierr_irq();
 154 }
 155 #else
 156 static inline void tx4927_pci_setup(void) {}
 157 static inline void tx4937_pci_setup(void) {}
 158 #endif /* CONFIG_PCI */
 159
 160 static void __init rbtx4927_gpio_init(void)
 161 {
 162         /* TX4927-SIO DTR on (PIO[15]) */
 163         gpio_request(15, "sio-dtr");
 164         gpio_direction_output(15, 1);
 165
 166         tx4927_sio_init(0, 0);
 167 }
 168
 169 static void __init rbtx4927_arch_init(void)
 170 {
 171         txx9_gpio_init(TX4927_PIO_REG & 0xfffffffffULL, 0, TX4927_NUM_PIO);
 172
 173         rbtx4927_gpio_init();
 174
 175         tx4927_pci_setup();
 176 }
 177
 178 static void __init rbtx4937_arch_init(void)
 179 {
 180         txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
 181
 182         rbtx4927_gpio_init();
 183
 184         tx4937_pci_setup();
 185 }
 186
 187 static void toshiba_rbtx4927_restart(char *command)
 188 {
 189         /* enable the s/w reset register */
 190         writeb(1, rbtx4927_softresetlock_addr);
 191
 192         /* wait for enable to be seen */
 193         while (!(readb(rbtx4927_softresetlock_addr) & 1))
 194                 ;
 195
 196         /* do a s/w reset */
 197         writeb(1, rbtx4927_softreset_addr);
 198
 199         /* fallback */
 200         (*_machine_halt)();
 201 }
 202
 203 static void __init rbtx4927_clock_init(void);
 204 static void __init rbtx4937_clock_init(void);
 205
 206 static void __init rbtx4927_mem_setup(void)
 207 {
 208         if (TX4927_REV_PCODE() == 0x4927) {
 209                 rbtx4927_clock_init();
 210                 tx4927_setup();
 211         } else {
 212                 rbtx4937_clock_init();
 213                 tx4938_setup();
 214         }
 215
 216         _machine_restart = toshiba_rbtx4927_restart;
 217
 218 #ifdef CONFIG_PCI
 219         txx9_alloc_pci_controller(&txx9_primary_pcic,
 220                                   RBTX4927_PCIMEM, RBTX4927_PCIMEM_SIZE,
 221                                   RBTX4927_PCIIO, RBTX4927_PCIIO_SIZE);
 222         txx9_board_pcibios_setup = tx4927_pcibios_setup;
 223 #else
 224         set_io_port_base(KSEG1 + RBTX4927_ISA_IO_OFFSET);
 225 #endif
 226 }
 227
 228 static void __init rbtx4927_clock_init(void)
 229 {
 230         /*
 231          * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
 232          *
 233          * For TX4927:
 234          * PCIDIVMODE[12:11]'s initial value is given by S9[4:3] (ON:0, OFF:1).
 235          * CPU 166MHz: PCI 66MHz : PCIDIVMODE: 00 (1/2.5)
 236          * CPU 200MHz: PCI 66MHz : PCIDIVMODE: 01 (1/3)
 237          * CPU 166MHz: PCI 33MHz : PCIDIVMODE: 10 (1/5)
 238          * CPU 200MHz: PCI 33MHz : PCIDIVMODE: 11 (1/6)
 239          * i.e. S9[3]: ON (83MHz), OFF (100MHz)
 240          */
 241         switch ((unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg) &
 242                 TX4927_CCFG_PCIDIVMODE_MASK) {
 243         case TX4927_CCFG_PCIDIVMODE_2_5:
 244         case TX4927_CCFG_PCIDIVMODE_5:
 245                 txx9_cpu_clock = 166666666;     /* 166MHz */
 246                 break;
 247         default:
 248                 txx9_cpu_clock = 200000000;     /* 200MHz */
 249         }
 250 }
 251
 252 static void __init rbtx4937_clock_init(void)
 253 {
 254         /*
 255          * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
 256          *
 257          * For TX4937:
 258          * PCIDIVMODE[12:11]'s initial value is given by S1[5:4] (ON:0, OFF:1)
 259          * PCIDIVMODE[10] is 0.
 260          * CPU 266MHz: PCI 33MHz : PCIDIVMODE: 000 (1/8)
 261          * CPU 266MHz: PCI 66MHz : PCIDIVMODE: 001 (1/4)
 262          * CPU 300MHz: PCI 33MHz : PCIDIVMODE: 010 (1/9)
 263          * CPU 300MHz: PCI 66MHz : PCIDIVMODE: 011 (1/4.5)
 264          * CPU 333MHz: PCI 33MHz : PCIDIVMODE: 100 (1/10)
 265          * CPU 333MHz: PCI 66MHz : PCIDIVMODE: 101 (1/5)
 266          */
 267         switch ((unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg) &
 268                 TX4938_CCFG_PCIDIVMODE_MASK) {
 269         case TX4938_CCFG_PCIDIVMODE_8:
 270         case TX4938_CCFG_PCIDIVMODE_4:
 271                 txx9_cpu_clock = 266666666;     /* 266MHz */
 272                 break;
 273         case TX4938_CCFG_PCIDIVMODE_9:
 274         case TX4938_CCFG_PCIDIVMODE_4_5:
 275                 txx9_cpu_clock = 300000000;     /* 300MHz */
 276                 break;
 277         default:
 278                 txx9_cpu_clock = 333333333;     /* 333MHz */
 279         }
 280 }
 281
 282 static void __init rbtx4927_time_init(void)
 283 {
 284         tx4927_time_init(0);
 285 }
 286
 287 static void __init toshiba_rbtx4927_rtc_init(void)
 288 {
 289         struct resource res = {
 290                 .start  = RBTX4927_BRAMRTC_BASE - IO_BASE,
 291                 .end    = RBTX4927_BRAMRTC_BASE - IO_BASE + 0x800 - 1,
 292                 .flags  = IORESOURCE_MEM,
 293         };
 294         platform_device_register_simple("rtc-ds1742", -1, &res, 1);
 295 }
 296
 297 static void __init rbtx4927_ne_init(void)
 298 {
 299         struct resource res[] = {
 300                 {
 301                         .start  = RBTX4927_RTL_8019_BASE,
 302                         .end    = RBTX4927_RTL_8019_BASE + 0x20 - 1,
 303                         .flags  = IORESOURCE_IO,
 304                 }, {
 305                         .start  = RBTX4927_RTL_8019_IRQ,
 306                         .flags  = IORESOURCE_IRQ,
 307                 }
 308         };
 309         platform_device_register_simple("ne", -1, res, ARRAY_SIZE(res));
 310 }
 311
 312 static void __init rbtx4927_mtd_init(void)
 313 {
 314         int i;
 315
 316         for (i = 0; i < 2; i++)
 317                 tx4927_mtd_init(i);
 318 }
 319
 320 static void __init rbtx4927_gpioled_init(void)
 321 {
 322         static const struct gpio_led leds[] = {
 323                 { .name = "gpioled:green:0", .gpio = 0, .active_low = 1, },
 324                 { .name = "gpioled:green:1", .gpio = 1, .active_low = 1, },
 325         };
 326         static struct gpio_led_platform_data pdata = {
 327                 .num_leds = ARRAY_SIZE(leds),
 328                 .leds = leds,
 329         };
 330         struct platform_device *pdev = platform_device_alloc("leds-gpio", 0);
 331
 332         if (!pdev)
 333                 return;
 334         pdev->dev.platform_data = &pdata;
 335         if (platform_device_add(pdev))
 336                 platform_device_put(pdev);
 337 }
 338
 339 static void __init rbtx4927_device_init(void)
 340 {
 341         toshiba_rbtx4927_rtc_init();
 342         rbtx4927_ne_init();
 343         tx4927_wdt_init();
 344         rbtx4927_mtd_init();
 345         if (TX4927_REV_PCODE() == 0x4927) {
 346                 tx4927_dmac_init(2);
 347                 tx4927_aclc_init(0, 1);
 348         } else {
 349                 tx4938_dmac_init(0, 2);
 350                 tx4938_aclc_init();
 351         }
 352         platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
 353         txx9_iocled_init(RBTX4927_LED_ADDR - IO_BASE, -1, 3, 1, "green", NULL);
 354         rbtx4927_gpioled_init();
 355 }
 356
 357 struct txx9_board_vec rbtx4927_vec __initdata = {
 358         .system = "Toshiba RBTX4927",
 359         .prom_init = rbtx4927_prom_init,
 360         .mem_setup = rbtx4927_mem_setup,
 361         .irq_setup = rbtx4927_irq_setup,
 362         .time_init = rbtx4927_time_init,
 363         .device_init = rbtx4927_device_init,
 364         .arch_init = rbtx4927_arch_init,
 365 #ifdef CONFIG_PCI
 366         .pci_map_irq = rbtx4927_pci_map_irq,
 367 #endif
 368 };
 369 struct txx9_board_vec rbtx4937_vec __initdata = {
 370         .system = "Toshiba RBTX4937",
 371         .prom_init = rbtx4927_prom_init,
 372         .mem_setup = rbtx4927_mem_setup,
 373         .irq_setup = rbtx4927_irq_setup,
 374         .time_init = rbtx4927_time_init,
 375         .device_init = rbtx4927_device_init,
 376         .arch_init = rbtx4937_arch_init,
 377 #ifdef CONFIG_PCI
 378         .pci_map_irq = rbtx4927_pci_map_irq,
 379 #endif
 380 };