core-$(CONFIG_M68EZ328) += arch/m68k/platform/68EZ328/
core-$(CONFIG_M68VZ328) += arch/m68k/platform/68VZ328/
core-$(CONFIG_COLDFIRE) += arch/m68k/platform/coldfire/
-core-$(CONFIG_M532x) += arch/m68k/platform/532x/
core-$(CONFIG_M54xx) += arch/m68k/platform/54xx/
+++ /dev/null
-#
-# Makefile for the m68knommu linux kernel.
-#
-
-#
-# If you want to play with the HW breakpoints then you will
-# need to add define this, which will give you a stack backtrace
-# on the console port whenever a DBG interrupt occurs. You have to
-# set up you HW breakpoints to trigger a DBG interrupt:
-#
-# ccflags-y := -DTRAP_DBG_INTERRUPT
-# asflags-y := -DTRAP_DBG_INTERRUPT
-#
-
-asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
-
-#obj-y := config.o usb-mcf532x.o spi-mcf532x.o
-obj-y := config.o
+++ /dev/null
-/***************************************************************************/
-
-/*
- * linux/arch/m68knommu/platform/532x/config.c
- *
- * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
- * Copyright (C) 2000, Lineo (www.lineo.com)
- * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
- * Copyright Freescale Semiconductor, Inc 2006
- * Copyright (c) 2006, emlix, Sebastian Hess <sh@emlix.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/***************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <asm/machdep.h>
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#include <asm/mcfuart.h>
-#include <asm/mcfdma.h>
-#include <asm/mcfgpio.h>
-#include <asm/mcfwdebug.h>
-
-/***************************************************************************/
-
-struct mcf_gpio_chip mcf_gpio_chips[] = {
- MCFGPS(PIRQ, 0, 8, MCFEPORT_EPDDR, MCFEPORT_EPDR, MCFEPORT_EPPDR),
- MCFGPF(FECH, 8, 8),
- MCFGPF(FECL, 16, 8),
- MCFGPF(SSI, 24, 5),
- MCFGPF(BUSCTL, 32, 4),
- MCFGPF(BE, 40, 4),
- MCFGPF(CS, 49, 5),
- MCFGPF(PWM, 58, 4),
- MCFGPF(FECI2C, 64, 4),
- MCFGPF(UART, 72, 8),
- MCFGPF(QSPI, 80, 6),
- MCFGPF(TIMER, 88, 4),
- MCFGPF(LCDDATAH, 96, 2),
- MCFGPF(LCDDATAM, 104, 8),
- MCFGPF(LCDDATAL, 112, 8),
- MCFGPF(LCDCTLH, 120, 1),
- MCFGPF(LCDCTLL, 128, 8),
-};
-
-unsigned int mcf_gpio_chips_size = ARRAY_SIZE(mcf_gpio_chips);
-
-/***************************************************************************/
-
-#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
-
-static void __init m532x_qspi_init(void)
-{
- /* setup QSPS pins for QSPI with gpio CS control */
- writew(0x01f0, MCF_GPIO_PAR_QSPI);
-}
-
-#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
-
-/***************************************************************************/
-
-static void __init m532x_uarts_init(void)
-{
- /* UART GPIO initialization */
- MCF_GPIO_PAR_UART |= 0x0FFF;
-}
-
-/***************************************************************************/
-
-static void __init m532x_fec_init(void)
-{
- /* Set multi-function pins to ethernet mode for fec0 */
- MCF_GPIO_PAR_FECI2C |= (MCF_GPIO_PAR_FECI2C_PAR_MDC_EMDC |
- MCF_GPIO_PAR_FECI2C_PAR_MDIO_EMDIO);
- MCF_GPIO_PAR_FEC = (MCF_GPIO_PAR_FEC_PAR_FEC_7W_FEC |
- MCF_GPIO_PAR_FEC_PAR_FEC_MII_FEC);
-}
-
-/***************************************************************************/
-
-void __init config_BSP(char *commandp, int size)
-{
-#if !defined(CONFIG_BOOTPARAM)
- /* Copy command line from FLASH to local buffer... */
- memcpy(commandp, (char *) 0x4000, 4);
- if(strncmp(commandp, "kcl ", 4) == 0){
- memcpy(commandp, (char *) 0x4004, size);
- commandp[size-1] = 0;
- } else {
- memset(commandp, 0, size);
- }
-#endif
-
- mach_sched_init = hw_timer_init;
- m532x_uarts_init();
- m532x_fec_init();
-#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
- m532x_qspi_init();
-#endif
-
-#ifdef CONFIG_BDM_DISABLE
- /*
- * Disable the BDM clocking. This also turns off most of the rest of
- * the BDM device. This is good for EMC reasons. This option is not
- * incompatible with the memory protection option.
- */
- wdebug(MCFDEBUG_CSR, MCFDEBUG_CSR_PSTCLK);
-#endif
-}
-
-/***************************************************************************/
-/* Board initialization */
-/***************************************************************************/
-/*
- * PLL min/max specifications
- */
-#define MAX_FVCO 500000 /* KHz */
-#define MAX_FSYS 80000 /* KHz */
-#define MIN_FSYS 58333 /* KHz */
-#define FREF 16000 /* KHz */
-
-
-#define MAX_MFD 135 /* Multiplier */
-#define MIN_MFD 88 /* Multiplier */
-#define BUSDIV 6 /* Divider */
-
-/*
- * Low Power Divider specifications
- */
-#define MIN_LPD (1 << 0) /* Divider (not encoded) */
-#define MAX_LPD (1 << 15) /* Divider (not encoded) */
-#define DEFAULT_LPD (1 << 1) /* Divider (not encoded) */
-
-#define SYS_CLK_KHZ 80000
-#define SYSTEM_PERIOD 12.5
-/*
- * SDRAM Timing Parameters
- */
-#define SDRAM_BL 8 /* # of beats in a burst */
-#define SDRAM_TWR 2 /* in clocks */
-#define SDRAM_CASL 2.5 /* CASL in clocks */
-#define SDRAM_TRCD 2 /* in clocks */
-#define SDRAM_TRP 2 /* in clocks */
-#define SDRAM_TRFC 7 /* in clocks */
-#define SDRAM_TREFI 7800 /* in ns */
-
-#define EXT_SRAM_ADDRESS (0xC0000000)
-#define FLASH_ADDRESS (0x00000000)
-#define SDRAM_ADDRESS (0x40000000)
-
-#define NAND_FLASH_ADDRESS (0xD0000000)
-
-int sys_clk_khz = 0;
-int sys_clk_mhz = 0;
-
-void wtm_init(void);
-void scm_init(void);
-void gpio_init(void);
-void fbcs_init(void);
-void sdramc_init(void);
-int clock_pll (int fsys, int flags);
-int clock_limp (int);
-int clock_exit_limp (void);
-int get_sys_clock (void);
-
-asmlinkage void __init sysinit(void)
-{
- sys_clk_khz = clock_pll(0, 0);
- sys_clk_mhz = sys_clk_khz/1000;
-
- wtm_init();
- scm_init();
- gpio_init();
- fbcs_init();
- sdramc_init();
-}
-
-void wtm_init(void)
-{
- /* Disable watchdog timer */
- MCF_WTM_WCR = 0;
-}
-
-#define MCF_SCM_BCR_GBW (0x00000100)
-#define MCF_SCM_BCR_GBR (0x00000200)
-
-void scm_init(void)
-{
- /* All masters are trusted */
- MCF_SCM_MPR = 0x77777777;
-
- /* Allow supervisor/user, read/write, and trusted/untrusted
- access to all slaves */
- MCF_SCM_PACRA = 0;
- MCF_SCM_PACRB = 0;
- MCF_SCM_PACRC = 0;
- MCF_SCM_PACRD = 0;
- MCF_SCM_PACRE = 0;
- MCF_SCM_PACRF = 0;
-
- /* Enable bursts */
- MCF_SCM_BCR = (MCF_SCM_BCR_GBR | MCF_SCM_BCR_GBW);
-}
-
-
-void fbcs_init(void)
-{
- MCF_GPIO_PAR_CS = 0x0000003E;
-
- /* Latch chip select */
- MCF_FBCS1_CSAR = 0x10080000;
-
- MCF_FBCS1_CSCR = 0x002A3780;
- MCF_FBCS1_CSMR = (MCF_FBCS_CSMR_BAM_2M | MCF_FBCS_CSMR_V);
-
- /* Initialize latch to drive signals to inactive states */
- *((u16 *)(0x10080000)) = 0xFFFF;
-
- /* External SRAM */
- MCF_FBCS1_CSAR = EXT_SRAM_ADDRESS;
- MCF_FBCS1_CSCR = (MCF_FBCS_CSCR_PS_16
- | MCF_FBCS_CSCR_AA
- | MCF_FBCS_CSCR_SBM
- | MCF_FBCS_CSCR_WS(1));
- MCF_FBCS1_CSMR = (MCF_FBCS_CSMR_BAM_512K
- | MCF_FBCS_CSMR_V);
-
- /* Boot Flash connected to FBCS0 */
- MCF_FBCS0_CSAR = FLASH_ADDRESS;
- MCF_FBCS0_CSCR = (MCF_FBCS_CSCR_PS_16
- | MCF_FBCS_CSCR_BEM
- | MCF_FBCS_CSCR_AA
- | MCF_FBCS_CSCR_SBM
- | MCF_FBCS_CSCR_WS(7));
- MCF_FBCS0_CSMR = (MCF_FBCS_CSMR_BAM_32M
- | MCF_FBCS_CSMR_V);
-}
-
-void sdramc_init(void)
-{
- /*
- * Check to see if the SDRAM has already been initialized
- * by a run control tool
- */
- if (!(MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)) {
- /* SDRAM chip select initialization */
-
- /* Initialize SDRAM chip select */
- MCF_SDRAMC_SDCS0 = (0
- | MCF_SDRAMC_SDCS_BA(SDRAM_ADDRESS)
- | MCF_SDRAMC_SDCS_CSSZ(MCF_SDRAMC_SDCS_CSSZ_32MBYTE));
-
- /*
- * Basic configuration and initialization
- */
- MCF_SDRAMC_SDCFG1 = (0
- | MCF_SDRAMC_SDCFG1_SRD2RW((int)((SDRAM_CASL + 2) + 0.5 ))
- | MCF_SDRAMC_SDCFG1_SWT2RD(SDRAM_TWR + 1)
- | MCF_SDRAMC_SDCFG1_RDLAT((int)((SDRAM_CASL*2) + 2))
- | MCF_SDRAMC_SDCFG1_ACT2RW((int)((SDRAM_TRCD ) + 0.5))
- | MCF_SDRAMC_SDCFG1_PRE2ACT((int)((SDRAM_TRP ) + 0.5))
- | MCF_SDRAMC_SDCFG1_REF2ACT((int)(((SDRAM_TRFC) ) + 0.5))
- | MCF_SDRAMC_SDCFG1_WTLAT(3));
- MCF_SDRAMC_SDCFG2 = (0
- | MCF_SDRAMC_SDCFG2_BRD2PRE(SDRAM_BL/2 + 1)
- | MCF_SDRAMC_SDCFG2_BWT2RW(SDRAM_BL/2 + SDRAM_TWR)
- | MCF_SDRAMC_SDCFG2_BRD2WT((int)((SDRAM_CASL+SDRAM_BL/2-1.0)+0.5))
- | MCF_SDRAMC_SDCFG2_BL(SDRAM_BL-1));
-
-
- /*
- * Precharge and enable write to SDMR
- */
- MCF_SDRAMC_SDCR = (0
- | MCF_SDRAMC_SDCR_MODE_EN
- | MCF_SDRAMC_SDCR_CKE
- | MCF_SDRAMC_SDCR_DDR
- | MCF_SDRAMC_SDCR_MUX(1)
- | MCF_SDRAMC_SDCR_RCNT((int)(((SDRAM_TREFI/(SYSTEM_PERIOD*64)) - 1) + 0.5))
- | MCF_SDRAMC_SDCR_PS_16
- | MCF_SDRAMC_SDCR_IPALL);
-
- /*
- * Write extended mode register
- */
- MCF_SDRAMC_SDMR = (0
- | MCF_SDRAMC_SDMR_BNKAD_LEMR
- | MCF_SDRAMC_SDMR_AD(0x0)
- | MCF_SDRAMC_SDMR_CMD);
-
- /*
- * Write mode register and reset DLL
- */
- MCF_SDRAMC_SDMR = (0
- | MCF_SDRAMC_SDMR_BNKAD_LMR
- | MCF_SDRAMC_SDMR_AD(0x163)
- | MCF_SDRAMC_SDMR_CMD);
-
- /*
- * Execute a PALL command
- */
- MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IPALL;
-
- /*
- * Perform two REF cycles
- */
- MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IREF;
- MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IREF;
-
- /*
- * Write mode register and clear reset DLL
- */
- MCF_SDRAMC_SDMR = (0
- | MCF_SDRAMC_SDMR_BNKAD_LMR
- | MCF_SDRAMC_SDMR_AD(0x063)
- | MCF_SDRAMC_SDMR_CMD);
-
- /*
- * Enable auto refresh and lock SDMR
- */
- MCF_SDRAMC_SDCR &= ~MCF_SDRAMC_SDCR_MODE_EN;
- MCF_SDRAMC_SDCR |= (0
- | MCF_SDRAMC_SDCR_REF
- | MCF_SDRAMC_SDCR_DQS_OE(0xC));
- }
-}
-
-void gpio_init(void)
-{
- /* Enable UART0 pins */
- MCF_GPIO_PAR_UART = ( 0
- | MCF_GPIO_PAR_UART_PAR_URXD0
- | MCF_GPIO_PAR_UART_PAR_UTXD0);
-
- /* Initialize TIN3 as a GPIO output to enable the write
- half of the latch */
- MCF_GPIO_PAR_TIMER = 0x00;
- __raw_writeb(0x08, MCFGPIO_PDDR_TIMER);
- __raw_writeb(0x00, MCFGPIO_PCLRR_TIMER);
-
-}
-
-int clock_pll(int fsys, int flags)
-{
- int fref, temp, fout, mfd;
- u32 i;
-
- fref = FREF;
-
- if (fsys == 0) {
- /* Return current PLL output */
- mfd = MCF_PLL_PFDR;
-
- return (fref * mfd / (BUSDIV * 4));
- }
-
- /* Check bounds of requested system clock */
- if (fsys > MAX_FSYS)
- fsys = MAX_FSYS;
- if (fsys < MIN_FSYS)
- fsys = MIN_FSYS;
-
- /* Multiplying by 100 when calculating the temp value,
- and then dividing by 100 to calculate the mfd allows
- for exact values without needing to include floating
- point libraries. */
- temp = 100 * fsys / fref;
- mfd = 4 * BUSDIV * temp / 100;
-
- /* Determine the output frequency for selected values */
- fout = (fref * mfd / (BUSDIV * 4));
-
- /*
- * Check to see if the SDRAM has already been initialized.
- * If it has then the SDRAM needs to be put into self refresh
- * mode before reprogramming the PLL.
- */
- if (MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)
- /* Put SDRAM into self refresh mode */
- MCF_SDRAMC_SDCR &= ~MCF_SDRAMC_SDCR_CKE;
-
- /*
- * Initialize the PLL to generate the new system clock frequency.
- * The device must be put into LIMP mode to reprogram the PLL.
- */
-
- /* Enter LIMP mode */
- clock_limp(DEFAULT_LPD);
-
- /* Reprogram PLL for desired fsys */
- MCF_PLL_PODR = (0
- | MCF_PLL_PODR_CPUDIV(BUSDIV/3)
- | MCF_PLL_PODR_BUSDIV(BUSDIV));
-
- MCF_PLL_PFDR = mfd;
-
- /* Exit LIMP mode */
- clock_exit_limp();
-
- /*
- * Return the SDRAM to normal operation if it is in use.
- */
- if (MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)
- /* Exit self refresh mode */
- MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_CKE;
-
- /* Errata - workaround for SDRAM opeartion after exiting LIMP mode */
- MCF_SDRAMC_LIMP_FIX = MCF_SDRAMC_REFRESH;
-
- /* wait for DQS logic to relock */
- for (i = 0; i < 0x200; i++)
- ;
-
- return fout;
-}
-
-int clock_limp(int div)
-{
- u32 temp;
-
- /* Check bounds of divider */
- if (div < MIN_LPD)
- div = MIN_LPD;
- if (div > MAX_LPD)
- div = MAX_LPD;
-
- /* Save of the current value of the SSIDIV so we don't
- overwrite the value*/
- temp = (MCF_CCM_CDR & MCF_CCM_CDR_SSIDIV(0xF));
-
- /* Apply the divider to the system clock */
- MCF_CCM_CDR = ( 0
- | MCF_CCM_CDR_LPDIV(div)
- | MCF_CCM_CDR_SSIDIV(temp));
-
- MCF_CCM_MISCCR |= MCF_CCM_MISCCR_LIMP;
-
- return (FREF/(3*(1 << div)));
-}
-
-int clock_exit_limp(void)
-{
- int fout;
-
- /* Exit LIMP mode */
- MCF_CCM_MISCCR = (MCF_CCM_MISCCR & ~ MCF_CCM_MISCCR_LIMP);
-
- /* Wait for PLL to lock */
- while (!(MCF_CCM_MISCCR & MCF_CCM_MISCCR_PLL_LOCK))
- ;
-
- fout = get_sys_clock();
-
- return fout;
-}
-
-int get_sys_clock(void)
-{
- int divider;
-
- /* Test to see if device is in LIMP mode */
- if (MCF_CCM_MISCCR & MCF_CCM_MISCCR_LIMP) {
- divider = MCF_CCM_CDR & MCF_CCM_CDR_LPDIV(0xF);
- return (FREF/(2 << divider));
- }
- else
- return ((FREF * MCF_PLL_PFDR) / (BUSDIV * 4));
-}
obj-$(CONFIG_M5272) += m5272.o intc-5272.o timers.o
obj-$(CONFIG_M528x) += m528x.o pit.o intc-2.o reset.o
obj-$(CONFIG_M5307) += m5307.o timers.o intc.o reset.o
-obj-$(CONFIG_M532x) += timers.o intc-simr.o reset.o
+obj-$(CONFIG_M532x) += m532x.o timers.o intc-simr.o reset.o
obj-$(CONFIG_M5407) += m5407.o timers.o intc.o reset.o
obj-$(CONFIG_M54xx) += sltimers.o intc-2.o
--- /dev/null
+/***************************************************************************/
+
+/*
+ * linux/arch/m68knommu/platform/532x/config.c
+ *
+ * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
+ * Copyright (C) 2000, Lineo (www.lineo.com)
+ * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
+ * Copyright Freescale Semiconductor, Inc 2006
+ * Copyright (c) 2006, emlix, Sebastian Hess <sh@emlix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/***************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/machdep.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfuart.h>
+#include <asm/mcfdma.h>
+#include <asm/mcfgpio.h>
+#include <asm/mcfwdebug.h>
+
+/***************************************************************************/
+
+struct mcf_gpio_chip mcf_gpio_chips[] = {
+ MCFGPS(PIRQ, 0, 8, MCFEPORT_EPDDR, MCFEPORT_EPDR, MCFEPORT_EPPDR),
+ MCFGPF(FECH, 8, 8),
+ MCFGPF(FECL, 16, 8),
+ MCFGPF(SSI, 24, 5),
+ MCFGPF(BUSCTL, 32, 4),
+ MCFGPF(BE, 40, 4),
+ MCFGPF(CS, 49, 5),
+ MCFGPF(PWM, 58, 4),
+ MCFGPF(FECI2C, 64, 4),
+ MCFGPF(UART, 72, 8),
+ MCFGPF(QSPI, 80, 6),
+ MCFGPF(TIMER, 88, 4),
+ MCFGPF(LCDDATAH, 96, 2),
+ MCFGPF(LCDDATAM, 104, 8),
+ MCFGPF(LCDDATAL, 112, 8),
+ MCFGPF(LCDCTLH, 120, 1),
+ MCFGPF(LCDCTLL, 128, 8),
+};
+
+unsigned int mcf_gpio_chips_size = ARRAY_SIZE(mcf_gpio_chips);
+
+/***************************************************************************/
+
+#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
+
+static void __init m532x_qspi_init(void)
+{
+ /* setup QSPS pins for QSPI with gpio CS control */
+ writew(0x01f0, MCF_GPIO_PAR_QSPI);
+}
+
+#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
+
+/***************************************************************************/
+
+static void __init m532x_uarts_init(void)
+{
+ /* UART GPIO initialization */
+ MCF_GPIO_PAR_UART |= 0x0FFF;
+}
+
+/***************************************************************************/
+
+static void __init m532x_fec_init(void)
+{
+ /* Set multi-function pins to ethernet mode for fec0 */
+ MCF_GPIO_PAR_FECI2C |= (MCF_GPIO_PAR_FECI2C_PAR_MDC_EMDC |
+ MCF_GPIO_PAR_FECI2C_PAR_MDIO_EMDIO);
+ MCF_GPIO_PAR_FEC = (MCF_GPIO_PAR_FEC_PAR_FEC_7W_FEC |
+ MCF_GPIO_PAR_FEC_PAR_FEC_MII_FEC);
+}
+
+/***************************************************************************/
+
+void __init config_BSP(char *commandp, int size)
+{
+#if !defined(CONFIG_BOOTPARAM)
+ /* Copy command line from FLASH to local buffer... */
+ memcpy(commandp, (char *) 0x4000, 4);
+ if(strncmp(commandp, "kcl ", 4) == 0){
+ memcpy(commandp, (char *) 0x4004, size);
+ commandp[size-1] = 0;
+ } else {
+ memset(commandp, 0, size);
+ }
+#endif
+
+ mach_sched_init = hw_timer_init;
+ m532x_uarts_init();
+ m532x_fec_init();
+#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
+ m532x_qspi_init();
+#endif
+
+#ifdef CONFIG_BDM_DISABLE
+ /*
+ * Disable the BDM clocking. This also turns off most of the rest of
+ * the BDM device. This is good for EMC reasons. This option is not
+ * incompatible with the memory protection option.
+ */
+ wdebug(MCFDEBUG_CSR, MCFDEBUG_CSR_PSTCLK);
+#endif
+}
+
+/***************************************************************************/
+/* Board initialization */
+/***************************************************************************/
+/*
+ * PLL min/max specifications
+ */
+#define MAX_FVCO 500000 /* KHz */
+#define MAX_FSYS 80000 /* KHz */
+#define MIN_FSYS 58333 /* KHz */
+#define FREF 16000 /* KHz */
+
+
+#define MAX_MFD 135 /* Multiplier */
+#define MIN_MFD 88 /* Multiplier */
+#define BUSDIV 6 /* Divider */
+
+/*
+ * Low Power Divider specifications
+ */
+#define MIN_LPD (1 << 0) /* Divider (not encoded) */
+#define MAX_LPD (1 << 15) /* Divider (not encoded) */
+#define DEFAULT_LPD (1 << 1) /* Divider (not encoded) */
+
+#define SYS_CLK_KHZ 80000
+#define SYSTEM_PERIOD 12.5
+/*
+ * SDRAM Timing Parameters
+ */
+#define SDRAM_BL 8 /* # of beats in a burst */
+#define SDRAM_TWR 2 /* in clocks */
+#define SDRAM_CASL 2.5 /* CASL in clocks */
+#define SDRAM_TRCD 2 /* in clocks */
+#define SDRAM_TRP 2 /* in clocks */
+#define SDRAM_TRFC 7 /* in clocks */
+#define SDRAM_TREFI 7800 /* in ns */
+
+#define EXT_SRAM_ADDRESS (0xC0000000)
+#define FLASH_ADDRESS (0x00000000)
+#define SDRAM_ADDRESS (0x40000000)
+
+#define NAND_FLASH_ADDRESS (0xD0000000)
+
+int sys_clk_khz = 0;
+int sys_clk_mhz = 0;
+
+void wtm_init(void);
+void scm_init(void);
+void gpio_init(void);
+void fbcs_init(void);
+void sdramc_init(void);
+int clock_pll (int fsys, int flags);
+int clock_limp (int);
+int clock_exit_limp (void);
+int get_sys_clock (void);
+
+asmlinkage void __init sysinit(void)
+{
+ sys_clk_khz = clock_pll(0, 0);
+ sys_clk_mhz = sys_clk_khz/1000;
+
+ wtm_init();
+ scm_init();
+ gpio_init();
+ fbcs_init();
+ sdramc_init();
+}
+
+void wtm_init(void)
+{
+ /* Disable watchdog timer */
+ MCF_WTM_WCR = 0;
+}
+
+#define MCF_SCM_BCR_GBW (0x00000100)
+#define MCF_SCM_BCR_GBR (0x00000200)
+
+void scm_init(void)
+{
+ /* All masters are trusted */
+ MCF_SCM_MPR = 0x77777777;
+
+ /* Allow supervisor/user, read/write, and trusted/untrusted
+ access to all slaves */
+ MCF_SCM_PACRA = 0;
+ MCF_SCM_PACRB = 0;
+ MCF_SCM_PACRC = 0;
+ MCF_SCM_PACRD = 0;
+ MCF_SCM_PACRE = 0;
+ MCF_SCM_PACRF = 0;
+
+ /* Enable bursts */
+ MCF_SCM_BCR = (MCF_SCM_BCR_GBR | MCF_SCM_BCR_GBW);
+}
+
+
+void fbcs_init(void)
+{
+ MCF_GPIO_PAR_CS = 0x0000003E;
+
+ /* Latch chip select */
+ MCF_FBCS1_CSAR = 0x10080000;
+
+ MCF_FBCS1_CSCR = 0x002A3780;
+ MCF_FBCS1_CSMR = (MCF_FBCS_CSMR_BAM_2M | MCF_FBCS_CSMR_V);
+
+ /* Initialize latch to drive signals to inactive states */
+ *((u16 *)(0x10080000)) = 0xFFFF;
+
+ /* External SRAM */
+ MCF_FBCS1_CSAR = EXT_SRAM_ADDRESS;
+ MCF_FBCS1_CSCR = (MCF_FBCS_CSCR_PS_16
+ | MCF_FBCS_CSCR_AA
+ | MCF_FBCS_CSCR_SBM
+ | MCF_FBCS_CSCR_WS(1));
+ MCF_FBCS1_CSMR = (MCF_FBCS_CSMR_BAM_512K
+ | MCF_FBCS_CSMR_V);
+
+ /* Boot Flash connected to FBCS0 */
+ MCF_FBCS0_CSAR = FLASH_ADDRESS;
+ MCF_FBCS0_CSCR = (MCF_FBCS_CSCR_PS_16
+ | MCF_FBCS_CSCR_BEM
+ | MCF_FBCS_CSCR_AA
+ | MCF_FBCS_CSCR_SBM
+ | MCF_FBCS_CSCR_WS(7));
+ MCF_FBCS0_CSMR = (MCF_FBCS_CSMR_BAM_32M
+ | MCF_FBCS_CSMR_V);
+}
+
+void sdramc_init(void)
+{
+ /*
+ * Check to see if the SDRAM has already been initialized
+ * by a run control tool
+ */
+ if (!(MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)) {
+ /* SDRAM chip select initialization */
+
+ /* Initialize SDRAM chip select */
+ MCF_SDRAMC_SDCS0 = (0
+ | MCF_SDRAMC_SDCS_BA(SDRAM_ADDRESS)
+ | MCF_SDRAMC_SDCS_CSSZ(MCF_SDRAMC_SDCS_CSSZ_32MBYTE));
+
+ /*
+ * Basic configuration and initialization
+ */
+ MCF_SDRAMC_SDCFG1 = (0
+ | MCF_SDRAMC_SDCFG1_SRD2RW((int)((SDRAM_CASL + 2) + 0.5 ))
+ | MCF_SDRAMC_SDCFG1_SWT2RD(SDRAM_TWR + 1)
+ | MCF_SDRAMC_SDCFG1_RDLAT((int)((SDRAM_CASL*2) + 2))
+ | MCF_SDRAMC_SDCFG1_ACT2RW((int)((SDRAM_TRCD ) + 0.5))
+ | MCF_SDRAMC_SDCFG1_PRE2ACT((int)((SDRAM_TRP ) + 0.5))
+ | MCF_SDRAMC_SDCFG1_REF2ACT((int)(((SDRAM_TRFC) ) + 0.5))
+ | MCF_SDRAMC_SDCFG1_WTLAT(3));
+ MCF_SDRAMC_SDCFG2 = (0
+ | MCF_SDRAMC_SDCFG2_BRD2PRE(SDRAM_BL/2 + 1)
+ | MCF_SDRAMC_SDCFG2_BWT2RW(SDRAM_BL/2 + SDRAM_TWR)
+ | MCF_SDRAMC_SDCFG2_BRD2WT((int)((SDRAM_CASL+SDRAM_BL/2-1.0)+0.5))
+ | MCF_SDRAMC_SDCFG2_BL(SDRAM_BL-1));
+
+
+ /*
+ * Precharge and enable write to SDMR
+ */
+ MCF_SDRAMC_SDCR = (0
+ | MCF_SDRAMC_SDCR_MODE_EN
+ | MCF_SDRAMC_SDCR_CKE
+ | MCF_SDRAMC_SDCR_DDR
+ | MCF_SDRAMC_SDCR_MUX(1)
+ | MCF_SDRAMC_SDCR_RCNT((int)(((SDRAM_TREFI/(SYSTEM_PERIOD*64)) - 1) + 0.5))
+ | MCF_SDRAMC_SDCR_PS_16
+ | MCF_SDRAMC_SDCR_IPALL);
+
+ /*
+ * Write extended mode register
+ */
+ MCF_SDRAMC_SDMR = (0
+ | MCF_SDRAMC_SDMR_BNKAD_LEMR
+ | MCF_SDRAMC_SDMR_AD(0x0)
+ | MCF_SDRAMC_SDMR_CMD);
+
+ /*
+ * Write mode register and reset DLL
+ */
+ MCF_SDRAMC_SDMR = (0
+ | MCF_SDRAMC_SDMR_BNKAD_LMR
+ | MCF_SDRAMC_SDMR_AD(0x163)
+ | MCF_SDRAMC_SDMR_CMD);
+
+ /*
+ * Execute a PALL command
+ */
+ MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IPALL;
+
+ /*
+ * Perform two REF cycles
+ */
+ MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IREF;
+ MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_IREF;
+
+ /*
+ * Write mode register and clear reset DLL
+ */
+ MCF_SDRAMC_SDMR = (0
+ | MCF_SDRAMC_SDMR_BNKAD_LMR
+ | MCF_SDRAMC_SDMR_AD(0x063)
+ | MCF_SDRAMC_SDMR_CMD);
+
+ /*
+ * Enable auto refresh and lock SDMR
+ */
+ MCF_SDRAMC_SDCR &= ~MCF_SDRAMC_SDCR_MODE_EN;
+ MCF_SDRAMC_SDCR |= (0
+ | MCF_SDRAMC_SDCR_REF
+ | MCF_SDRAMC_SDCR_DQS_OE(0xC));
+ }
+}
+
+void gpio_init(void)
+{
+ /* Enable UART0 pins */
+ MCF_GPIO_PAR_UART = ( 0
+ | MCF_GPIO_PAR_UART_PAR_URXD0
+ | MCF_GPIO_PAR_UART_PAR_UTXD0);
+
+ /* Initialize TIN3 as a GPIO output to enable the write
+ half of the latch */
+ MCF_GPIO_PAR_TIMER = 0x00;
+ __raw_writeb(0x08, MCFGPIO_PDDR_TIMER);
+ __raw_writeb(0x00, MCFGPIO_PCLRR_TIMER);
+
+}
+
+int clock_pll(int fsys, int flags)
+{
+ int fref, temp, fout, mfd;
+ u32 i;
+
+ fref = FREF;
+
+ if (fsys == 0) {
+ /* Return current PLL output */
+ mfd = MCF_PLL_PFDR;
+
+ return (fref * mfd / (BUSDIV * 4));
+ }
+
+ /* Check bounds of requested system clock */
+ if (fsys > MAX_FSYS)
+ fsys = MAX_FSYS;
+ if (fsys < MIN_FSYS)
+ fsys = MIN_FSYS;
+
+ /* Multiplying by 100 when calculating the temp value,
+ and then dividing by 100 to calculate the mfd allows
+ for exact values without needing to include floating
+ point libraries. */
+ temp = 100 * fsys / fref;
+ mfd = 4 * BUSDIV * temp / 100;
+
+ /* Determine the output frequency for selected values */
+ fout = (fref * mfd / (BUSDIV * 4));
+
+ /*
+ * Check to see if the SDRAM has already been initialized.
+ * If it has then the SDRAM needs to be put into self refresh
+ * mode before reprogramming the PLL.
+ */
+ if (MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)
+ /* Put SDRAM into self refresh mode */
+ MCF_SDRAMC_SDCR &= ~MCF_SDRAMC_SDCR_CKE;
+
+ /*
+ * Initialize the PLL to generate the new system clock frequency.
+ * The device must be put into LIMP mode to reprogram the PLL.
+ */
+
+ /* Enter LIMP mode */
+ clock_limp(DEFAULT_LPD);
+
+ /* Reprogram PLL for desired fsys */
+ MCF_PLL_PODR = (0
+ | MCF_PLL_PODR_CPUDIV(BUSDIV/3)
+ | MCF_PLL_PODR_BUSDIV(BUSDIV));
+
+ MCF_PLL_PFDR = mfd;
+
+ /* Exit LIMP mode */
+ clock_exit_limp();
+
+ /*
+ * Return the SDRAM to normal operation if it is in use.
+ */
+ if (MCF_SDRAMC_SDCR & MCF_SDRAMC_SDCR_REF)
+ /* Exit self refresh mode */
+ MCF_SDRAMC_SDCR |= MCF_SDRAMC_SDCR_CKE;
+
+ /* Errata - workaround for SDRAM opeartion after exiting LIMP mode */
+ MCF_SDRAMC_LIMP_FIX = MCF_SDRAMC_REFRESH;
+
+ /* wait for DQS logic to relock */
+ for (i = 0; i < 0x200; i++)
+ ;
+
+ return fout;
+}
+
+int clock_limp(int div)
+{
+ u32 temp;
+
+ /* Check bounds of divider */
+ if (div < MIN_LPD)
+ div = MIN_LPD;
+ if (div > MAX_LPD)
+ div = MAX_LPD;
+
+ /* Save of the current value of the SSIDIV so we don't
+ overwrite the value*/
+ temp = (MCF_CCM_CDR & MCF_CCM_CDR_SSIDIV(0xF));
+
+ /* Apply the divider to the system clock */
+ MCF_CCM_CDR = ( 0
+ | MCF_CCM_CDR_LPDIV(div)
+ | MCF_CCM_CDR_SSIDIV(temp));
+
+ MCF_CCM_MISCCR |= MCF_CCM_MISCCR_LIMP;
+
+ return (FREF/(3*(1 << div)));
+}
+
+int clock_exit_limp(void)
+{
+ int fout;
+
+ /* Exit LIMP mode */
+ MCF_CCM_MISCCR = (MCF_CCM_MISCCR & ~ MCF_CCM_MISCCR_LIMP);
+
+ /* Wait for PLL to lock */
+ while (!(MCF_CCM_MISCCR & MCF_CCM_MISCCR_PLL_LOCK))
+ ;
+
+ fout = get_sys_clock();
+
+ return fout;
+}
+
+int get_sys_clock(void)
+{
+ int divider;
+
+ /* Test to see if device is in LIMP mode */
+ if (MCF_CCM_MISCCR & MCF_CCM_MISCCR_LIMP) {
+ divider = MCF_CCM_CDR & MCF_CCM_CDR_LPDIV(0xF);
+ return (FREF/(2 << divider));
+ }
+ else
+ return ((FREF * MCF_PLL_PFDR) / (BUSDIV * 4));
+}
projects / deliverable / linux.git / commitdiff
