arch/mips/au1000/pb1200/board_setup.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      Alchemy Pb1200/Db1200 board setup.
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  *
  11  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  12  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  13  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  14  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  15  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  16  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  17  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  18  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  19  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  20  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  21  *
  22  *  You should have received a copy of the  GNU General Public License along
  23  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  24  *  675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26 #include <linux/config.h>
  27 #include <linux/init.h>
  28 #include <linux/sched.h>
  29 #include <linux/ioport.h>
  30 #include <linux/mm.h>
  31 #include <linux/console.h>
  32 #include <linux/mc146818rtc.h>
  33 #include <linux/delay.h>
  34
  35 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX)
  36 #include <linux/ide.h>
  37 #endif
  38
  39 #include <asm/cpu.h>
  40 #include <asm/bootinfo.h>
  41 #include <asm/irq.h>
  42 #include <asm/mipsregs.h>
  43 #include <asm/reboot.h>
  44 #include <asm/pgtable.h>
  45 #include <asm/mach-au1x00/au1000.h>
  46 #include <asm/mach-au1x00/au1xxx_dbdma.h>
  47
  48 #ifdef CONFIG_MIPS_PB1200
  49 #include <asm/mach-pb1x00/pb1200.h>
  50 #endif
  51
  52 #ifdef CONFIG_MIPS_DB1200
  53 #include <asm/mach-db1x00/db1200.h>
  54 #define PB1200_ETH_INT DB1200_ETH_INT
  55 #define PB1200_IDE_INT DB1200_IDE_INT
  56 #endif
  57
  58 extern void _board_init_irq(void);
  59 extern void     (*board_init_irq)(void);
  60
  61 void board_reset (void)
  62 {
  63         bcsr->resets = 0;
  64         bcsr->system = 0;
  65 }
  66
  67 void __init board_setup(void)
  68 {
  69         char *argptr = NULL;
  70         u32 pin_func;
  71
  72 #if 0
  73         /* Enable PSC1 SYNC for AC97.  Normaly done in audio driver,
  74          * but it is board specific code, so put it here.
  75          */
  76         pin_func = au_readl(SYS_PINFUNC);
  77         au_sync();
  78         pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
  79         au_writel(pin_func, SYS_PINFUNC);
  80
  81         au_writel(0, (u32)bcsr|0x10); /* turn off pcmcia power */
  82         au_sync();
  83 #endif
  84
  85 #if defined(CONFIG_I2C_AU1550)
  86         {
  87         u32 freq0, clksrc;
  88
  89         /* Select SMBUS in CPLD */
  90         bcsr->resets &= ~(BCSR_RESETS_PCS0MUX);
  91
  92         pin_func = au_readl(SYS_PINFUNC);
  93         au_sync();
  94         pin_func &= ~(3<<17 | 1<<4);
  95         /* Set GPIOs correctly */
  96         pin_func |= 2<<17;
  97         au_writel(pin_func, SYS_PINFUNC);
  98         au_sync();
  99
 100         /* The i2c driver depends on 50Mhz clock */
 101         freq0 = au_readl(SYS_FREQCTRL0);
 102         au_sync();
 103         freq0 &= ~(SYS_FC_FRDIV1_MASK | SYS_FC_FS1 | SYS_FC_FE1);
 104         freq0 |= (3<<SYS_FC_FRDIV1_BIT);
 105         /* 396Mhz / (3+1)*2 == 49.5Mhz */
 106         au_writel(freq0, SYS_FREQCTRL0);
 107         au_sync();
 108         freq0 |= SYS_FC_FE1;
 109         au_writel(freq0, SYS_FREQCTRL0);
 110         au_sync();
 111
 112         clksrc = au_readl(SYS_CLKSRC);
 113         au_sync();
 114         clksrc &= ~0x01f00000;
 115         /* bit 22 is EXTCLK0 for PSC0 */
 116         clksrc |= (0x3 << 22);
 117         au_writel(clksrc, SYS_CLKSRC);
 118         au_sync();
 119         }
 120 #endif
 121
 122 #ifdef CONFIG_FB_AU1200
 123         argptr = prom_getcmdline();
 124 #ifdef CONFIG_MIPS_PB1200
 125         strcat(argptr, " video=au1200fb:panel:bs");
 126 #endif
 127 #ifdef CONFIG_MIPS_DB1200
 128         strcat(argptr, " video=au1200fb:panel:bs");
 129 #endif
 130 #endif
 131
 132         /* The Pb1200 development board uses external MUX for PSC0 to
 133         support SMB/SPI. bcsr->resets bit 12: 0=SMB 1=SPI
 134         */
 135 #if defined(CONFIG_AU1XXX_PSC_SPI) && defined(CONFIG_I2C_AU1550)
 136         #error I2C and SPI are mutually exclusive. Both are physically connected to PSC0.\
 137                         Refer to Pb1200/Db1200 documentation.
 138 #elif defined( CONFIG_AU1XXX_PSC_SPI )
 139         bcsr->resets |= BCSR_RESETS_PCS0MUX;
 140         /*Hard Coding Value to enable Temp Sensors [bit 14] Value for SOC Au1200. Pls refer documentation*/
 141           bcsr->resets =0x900f;
 142 #elif defined( CONFIG_I2C_AU1550 )
 143         bcsr->resets &= (~BCSR_RESETS_PCS0MUX);
 144 #endif
 145         au_sync();
 146
 147 #ifdef CONFIG_MIPS_PB1200
 148         printk("AMD Alchemy Pb1200 Board\n");
 149 #endif
 150 #ifdef CONFIG_MIPS_DB1200
 151         printk("AMD Alchemy Db1200 Board\n");
 152 #endif
 153
 154         /* Setup Pb1200 External Interrupt Controller */
 155         {
 156                 extern void (*board_init_irq)(void);
 157                 extern void _board_init_irq(void);
 158                 board_init_irq = _board_init_irq;
 159         }
 160 }
 161
 162 int
 163 board_au1200fb_panel (void)
 164 {
 165         BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
 166         int p;
 167
 168         p = bcsr->switches;
 169         p >>= 8;
 170         p &= 0x0F;
 171         return p;
 172 }
 173
 174 int
 175 board_au1200fb_panel_init (void)
 176 {
 177         /* Apply power */
 178     BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
 179         bcsr->board |= (BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD | BCSR_BOARD_LCDBL);
 180         /*printk("board_au1200fb_panel_init()\n"); */
 181         return 0;
 182 }
 183
 184 int
 185 board_au1200fb_panel_shutdown (void)
 186 {
 187         /* Remove power */
 188     BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
 189         bcsr->board &= ~(BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD | BCSR_BOARD_LCDBL);
 190         /*printk("board_au1200fb_panel_shutdown()\n"); */
 191         return 0;
 192 }
 193