165 lines
4.1 KiB
C
165 lines
4.1 KiB
C
/*
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*
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* BRIEF MODULE DESCRIPTION
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* Alchemy Pb1200/Db1200 board setup.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <prom.h>
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#include <au1xxx.h>
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const char *get_system_type(void)
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{
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return "Alchemy Pb1200";
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}
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void board_reset(void)
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{
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bcsr->resets = 0;
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bcsr->system = 0;
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}
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void __init board_setup(void)
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{
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char *argptr;
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argptr = prom_getcmdline();
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#ifdef CONFIG_SERIAL_8250_CONSOLE
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argptr = strstr(argptr, "console=");
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if (argptr == NULL) {
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argptr = prom_getcmdline();
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strcat(argptr, " console=ttyS0,115200");
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}
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#endif
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#ifdef CONFIG_FB_AU1200
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strcat(argptr, " video=au1200fb:panel:bs");
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#endif
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#if 0
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{
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u32 pin_func;
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/*
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* Enable PSC1 SYNC for AC97. Normaly done in audio driver,
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* but it is board specific code, so put it here.
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*/
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pin_func = au_readl(SYS_PINFUNC);
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au_sync();
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pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
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au_writel(pin_func, SYS_PINFUNC);
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au_writel(0, (u32)bcsr | 0x10); /* turn off PCMCIA power */
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au_sync();
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}
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#endif
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#if defined(CONFIG_I2C_AU1550)
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{
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u32 freq0, clksrc;
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u32 pin_func;
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/* Select SMBus in CPLD */
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bcsr->resets &= ~BCSR_RESETS_PCS0MUX;
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pin_func = au_readl(SYS_PINFUNC);
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au_sync();
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pin_func &= ~(SYS_PINFUNC_P0A | SYS_PINFUNC_P0B);
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/* Set GPIOs correctly */
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pin_func |= 2 << 17;
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au_writel(pin_func, SYS_PINFUNC);
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au_sync();
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/* The I2C driver depends on 50 MHz clock */
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freq0 = au_readl(SYS_FREQCTRL0);
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au_sync();
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freq0 &= ~(SYS_FC_FRDIV1_MASK | SYS_FC_FS1 | SYS_FC_FE1);
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freq0 |= 3 << SYS_FC_FRDIV1_BIT;
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/* 396 MHz / (3 + 1) * 2 == 49.5 MHz */
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au_writel(freq0, SYS_FREQCTRL0);
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au_sync();
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freq0 |= SYS_FC_FE1;
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au_writel(freq0, SYS_FREQCTRL0);
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au_sync();
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clksrc = au_readl(SYS_CLKSRC);
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au_sync();
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clksrc &= ~(SYS_CS_CE0 | SYS_CS_DE0 | SYS_CS_ME0_MASK);
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/* Bit 22 is EXTCLK0 for PSC0 */
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clksrc |= SYS_CS_MUX_FQ1 << SYS_CS_ME0_BIT;
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au_writel(clksrc, SYS_CLKSRC);
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au_sync();
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}
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#endif
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/*
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* The Pb1200 development board uses external MUX for PSC0 to
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* support SMB/SPI. bcsr->resets bit 12: 0=SMB 1=SPI
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*/
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#ifdef CONFIG_I2C_AU1550
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bcsr->resets &= ~BCSR_RESETS_PCS0MUX;
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#endif
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au_sync();
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#ifdef CONFIG_MIPS_PB1200
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printk(KERN_INFO "AMD Alchemy Pb1200 Board\n");
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#endif
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#ifdef CONFIG_MIPS_DB1200
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printk(KERN_INFO "AMD Alchemy Db1200 Board\n");
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#endif
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}
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int board_au1200fb_panel(void)
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{
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BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
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int p;
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p = bcsr->switches;
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p >>= 8;
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p &= 0x0F;
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return p;
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}
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int board_au1200fb_panel_init(void)
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{
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/* Apply power */
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BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
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bcsr->board |= BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD | BCSR_BOARD_LCDBL;
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/* printk(KERN_DEBUG "board_au1200fb_panel_init()\n"); */
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return 0;
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}
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int board_au1200fb_panel_shutdown(void)
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{
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/* Remove power */
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BCSR *bcsr = (BCSR *)BCSR_KSEG1_ADDR;
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bcsr->board &= ~(BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |
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BCSR_BOARD_LCDBL);
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/* printk(KERN_DEBUG "board_au1200fb_panel_shutdown()\n"); */
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return 0;
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}
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