FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/ar71xx_chip.c

     /*-
      * Copyright (c) 2010 Adrian Chadd
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <machine/cpuregs.h>
    
    #include <mips/sentry5/s5reg.h>
    
    #include "opt_ddb.h"
    
    #include <sys/param.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/cons.h>
    #include <sys/kdb.h>
    #include <sys/reboot.h>
     
    #include <vm/vm.h>
    #include <vm/vm_page.h>
     
    #include <net/ethernet.h>
     
    #include <machine/clock.h>
    #include <machine/cpu.h>
    #include <machine/hwfunc.h>
    #include <machine/md_var.h>
    #include <machine/trap.h>
    #include <machine/vmparam.h>
     
    #include <mips/atheros/ar71xxreg.h>
    
    #include <mips/atheros/ar71xx_chip.h>
    
    #include <mips/atheros/ar71xx_cpudef.h>
    
    /* XXX these should replace the current definitions in ar71xxreg.h */
    /* XXX perhaps an ar71xx_chip.h header file? */
    #define AR71XX_PLL_REG_CPU_CONFIG       AR71XX_PLL_CPU_BASE + 0x00
    #define AR71XX_PLL_REG_SEC_CONFIG       AR71XX_PLL_CPU_BASE + 0x04
    #define AR71XX_PLL_REG_ETH0_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x10
    #define AR71XX_PLL_REG_ETH1_INT_CLOCK   AR71XX_PLL_CPU_BASE + 0x14
    
    #define AR71XX_PLL_DIV_SHIFT            3
    #define AR71XX_PLL_DIV_MASK             0x1f
    #define AR71XX_CPU_DIV_SHIFT            16
    #define AR71XX_CPU_DIV_MASK             0x3
    #define AR71XX_DDR_DIV_SHIFT            18
    #define AR71XX_DDR_DIV_MASK             0x3
    #define AR71XX_AHB_DIV_SHIFT            20
    #define AR71XX_AHB_DIV_MASK             0x7
    
    /* XXX these shouldn't be in here - this file is a per-chip file */
    /* XXX these should be in the top-level ar71xx type, not ar71xx -chip */
    uint32_t u_ar71xx_cpu_freq;
    uint32_t u_ar71xx_ahb_freq;
    uint32_t u_ar71xx_ddr_freq;
    
    static void
    ar71xx_chip_detect_mem_size(void)
    {
    }
    
    static void
    ar71xx_chip_detect_sys_frequency(void)
    {
            uint32_t pll;
            uint32_t freq;
            uint32_t div;
    
            pll = ATH_READ_REG(AR71XX_PLL_REG_CPU_CONFIG);
    
           div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
           freq = div * AR71XX_BASE_FREQ;
   
           div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
           u_ar71xx_cpu_freq = freq / div;
   
           div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
           u_ar71xx_ddr_freq = freq / div;
   
           div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
           u_ar71xx_ahb_freq = u_ar71xx_cpu_freq / div;
   }
   
   /*
    * This does not lock the CPU whilst doing the work!
    */
   static void
   ar71xx_chip_device_stop(uint32_t mask)
   {
           uint32_t reg;
   
           reg = ATH_READ_REG(AR71XX_RST_RESET);
           ATH_WRITE_REG(AR71XX_RST_RESET, reg | mask);
   }
   
   static void
   ar71xx_chip_device_start(uint32_t mask)
   {
           uint32_t reg;
   
           reg = ATH_READ_REG(AR71XX_RST_RESET);
           ATH_WRITE_REG(AR71XX_RST_RESET, reg & ~mask);
   }
   
   static int
   ar71xx_chip_device_stopped(uint32_t mask)
   {
           uint32_t reg;
   
           reg = ATH_READ_REG(AR71XX_RST_RESET);
           return ((reg & mask) == mask);
   }
   
   /* Speed is either 10, 100 or 1000 */
   static void
   ar71xx_chip_set_pll_ge0(int speed)
   {
           uint32_t pll;
   
           switch(speed) {
                   case 10:
                           pll = PLL_ETH_INT_CLK_10;
                           break;
                   case 100:
                           pll = PLL_ETH_INT_CLK_100;
                           break;
                   case 1000:
                           pll = PLL_ETH_INT_CLK_1000;
                           break;
                   default:
                           printf("ar71xx_chip_set_pll_ge0: invalid speed %d\n", speed);
                           return;
           }
   
           ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG, AR71XX_PLL_ETH_INT0_CLK, pll, AR71XX_PLL_ETH0_SHIFT);
   }
   
   static void
   ar71xx_chip_set_pll_ge1(int speed)
   {
           uint32_t pll;
   
           switch(speed) {
                   case 10:
                           pll = PLL_ETH_INT_CLK_10;
                           break;
                   case 100:
                           pll = PLL_ETH_INT_CLK_100;
                           break;
                   case 1000:
                           pll = PLL_ETH_INT_CLK_1000;
                           break;
                   default:
                           printf("ar71xx_chip_set_pll_ge1: invalid speed %d\n", speed);
                           return;
           }
   
           ar71xx_write_pll(AR71XX_PLL_SEC_CONFIG, AR71XX_PLL_ETH_INT1_CLK, pll, AR71XX_PLL_ETH1_SHIFT);
   }
   
   static void
   ar71xx_chip_ddr_flush_ge0(void)
   {
           ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE0);
   }
   
   static void
   ar71xx_chip_ddr_flush_ge1(void)
   {
           ar71xx_ddr_flush(AR71XX_WB_FLUSH_GE1);
   }
   
   static uint32_t
   ar71xx_chip_get_eth_pll(unsigned int mac, int speed)
   {
           return 0;
   }
   
   static void
   ar71xx_chip_init_usb_peripheral(void)
   {
           ar71xx_device_stop(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
           DELAY(1000);
   
           ar71xx_device_start(RST_RESET_USB_OHCI_DLL | RST_RESET_USB_HOST | RST_RESET_USB_PHY);
           DELAY(1000);
   
           ATH_WRITE_REG(AR71XX_USB_CTRL_CONFIG,
               USB_CTRL_CONFIG_OHCI_DES_SWAP | USB_CTRL_CONFIG_OHCI_BUF_SWAP |
               USB_CTRL_CONFIG_EHCI_DES_SWAP | USB_CTRL_CONFIG_EHCI_BUF_SWAP);
   
           ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
               (32 << USB_CTRL_FLADJ_HOST_SHIFT) | (3 << USB_CTRL_FLADJ_A5_SHIFT));
   
           DELAY(1000);
   }
   
   struct ar71xx_cpu_def ar71xx_chip_def = {
           &ar71xx_chip_detect_mem_size,
           &ar71xx_chip_detect_sys_frequency,
           &ar71xx_chip_device_stop,
           &ar71xx_chip_device_start,
           &ar71xx_chip_device_stopped,
           &ar71xx_chip_set_pll_ge0,
           &ar71xx_chip_set_pll_ge1,
           &ar71xx_chip_ddr_flush_ge0,
           &ar71xx_chip_ddr_flush_ge1,
           &ar71xx_chip_get_eth_pll,
           NULL,
           &ar71xx_chip_init_usb_peripheral,
   };

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