| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Greg Ungerer | 1416 | 62.82% | 11 | 61.11% |
| Steven King | 836 | 37.09% | 6 | 33.33% |
| Thomas Gleixner | 2 | 0.09% | 1 | 5.56% |
| Total | 2254 | 18 |
// SPDX-License-Identifier: GPL-2.0-or-later /***************************************************************************/ /* * m53xx.c -- platform support for ColdFire 53xx based boards * * 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 <shess@hessware.de> */ /***************************************************************************/ #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/mcfwdebug.h> #include <asm/mcfclk.h> /***************************************************************************/ DEFINE_CLK(0, "flexbus", 2, MCF_CLK); DEFINE_CLK(0, "mcfcan.0", 8, MCF_CLK); DEFINE_CLK(0, "fec.0", 12, MCF_CLK); DEFINE_CLK(0, "edma", 17, MCF_CLK); DEFINE_CLK(0, "intc.0", 18, MCF_CLK); DEFINE_CLK(0, "intc.1", 19, MCF_CLK); DEFINE_CLK(0, "iack.0", 21, MCF_CLK); DEFINE_CLK(0, "imx1-i2c.0", 22, MCF_CLK); DEFINE_CLK(0, "mcfqspi.0", 23, MCF_CLK); DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK); DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK); DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK); DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK); DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK); DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK); DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK); DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK); DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK); DEFINE_CLK(0, "mcfpit.2", 34, MCF_CLK); DEFINE_CLK(0, "mcfpit.3", 35, MCF_CLK); DEFINE_CLK(0, "mcfpwm.0", 36, MCF_CLK); DEFINE_CLK(0, "mcfeport.0", 37, MCF_CLK); DEFINE_CLK(0, "mcfwdt.0", 38, MCF_CLK); DEFINE_CLK(0, "sys.0", 40, MCF_BUSCLK); DEFINE_CLK(0, "gpio.0", 41, MCF_BUSCLK); DEFINE_CLK(0, "mcfrtc.0", 42, MCF_CLK); DEFINE_CLK(0, "mcflcd.0", 43, MCF_CLK); DEFINE_CLK(0, "mcfusb-otg.0", 44, MCF_CLK); DEFINE_CLK(0, "mcfusb-host.0", 45, MCF_CLK); DEFINE_CLK(0, "sdram.0", 46, MCF_CLK); DEFINE_CLK(0, "ssi.0", 47, MCF_CLK); DEFINE_CLK(0, "pll.0", 48, MCF_CLK); DEFINE_CLK(1, "mdha.0", 32, MCF_CLK); DEFINE_CLK(1, "skha.0", 33, MCF_CLK); DEFINE_CLK(1, "rng.0", 34, MCF_CLK); struct clk *mcf_clks[] = { &__clk_0_2, /* flexbus */ &__clk_0_8, /* mcfcan.0 */ &__clk_0_12, /* fec.0 */ &__clk_0_17, /* edma */ &__clk_0_18, /* intc.0 */ &__clk_0_19, /* intc.1 */ &__clk_0_21, /* iack.0 */ &__clk_0_22, /* imx1-i2c.0 */ &__clk_0_23, /* mcfqspi.0 */ &__clk_0_24, /* mcfuart.0 */ &__clk_0_25, /* mcfuart.1 */ &__clk_0_26, /* mcfuart.2 */ &__clk_0_28, /* mcftmr.0 */ &__clk_0_29, /* mcftmr.1 */ &__clk_0_30, /* mcftmr.2 */ &__clk_0_31, /* mcftmr.3 */ &__clk_0_32, /* mcfpit.0 */ &__clk_0_33, /* mcfpit.1 */ &__clk_0_34, /* mcfpit.2 */ &__clk_0_35, /* mcfpit.3 */ &__clk_0_36, /* mcfpwm.0 */ &__clk_0_37, /* mcfeport.0 */ &__clk_0_38, /* mcfwdt.0 */ &__clk_0_40, /* sys.0 */ &__clk_0_41, /* gpio.0 */ &__clk_0_42, /* mcfrtc.0 */ &__clk_0_43, /* mcflcd.0 */ &__clk_0_44, /* mcfusb-otg.0 */ &__clk_0_45, /* mcfusb-host.0 */ &__clk_0_46, /* sdram.0 */ &__clk_0_47, /* ssi.0 */ &__clk_0_48, /* pll.0 */ &__clk_1_32, /* mdha.0 */ &__clk_1_33, /* skha.0 */ &__clk_1_34, /* rng.0 */ NULL, }; static struct clk * const enable_clks[] __initconst = { &__clk_0_2, /* flexbus */ &__clk_0_18, /* intc.0 */ &__clk_0_19, /* intc.1 */ &__clk_0_21, /* iack.0 */ &__clk_0_24, /* mcfuart.0 */ &__clk_0_25, /* mcfuart.1 */ &__clk_0_26, /* mcfuart.2 */ &__clk_0_28, /* mcftmr.0 */ &__clk_0_29, /* mcftmr.1 */ &__clk_0_32, /* mcfpit.0 */ &__clk_0_33, /* mcfpit.1 */ &__clk_0_37, /* mcfeport.0 */ &__clk_0_40, /* sys.0 */ &__clk_0_41, /* gpio.0 */ &__clk_0_46, /* sdram.0 */ &__clk_0_48, /* pll.0 */ }; static struct clk * const disable_clks[] __initconst = { &__clk_0_8, /* mcfcan.0 */ &__clk_0_12, /* fec.0 */ &__clk_0_17, /* edma */ &__clk_0_22, /* imx1-i2c.0 */ &__clk_0_23, /* mcfqspi.0 */ &__clk_0_30, /* mcftmr.2 */ &__clk_0_31, /* mcftmr.3 */ &__clk_0_34, /* mcfpit.2 */ &__clk_0_35, /* mcfpit.3 */ &__clk_0_36, /* mcfpwm.0 */ &__clk_0_38, /* mcfwdt.0 */ &__clk_0_42, /* mcfrtc.0 */ &__clk_0_43, /* mcflcd.0 */ &__clk_0_44, /* mcfusb-otg.0 */ &__clk_0_45, /* mcfusb-host.0 */ &__clk_0_47, /* ssi.0 */ &__clk_1_32, /* mdha.0 */ &__clk_1_33, /* skha.0 */ &__clk_1_34, /* rng.0 */ }; static void __init m53xx_clk_init(void) { unsigned i; /* make sure these clocks are enabled */ for (i = 0; i < ARRAY_SIZE(enable_clks); ++i) __clk_init_enabled(enable_clks[i]); /* make sure these clocks are disabled */ for (i = 0; i < ARRAY_SIZE(disable_clks); ++i) __clk_init_disabled(disable_clks[i]); } /***************************************************************************/ static void __init m53xx_qspi_init(void) { #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) /* setup QSPS pins for QSPI with gpio CS control */ writew(0x01f0, MCFGPIO_PAR_QSPI); #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */ } /***************************************************************************/ static void __init m53xx_i2c_init(void) { #if IS_ENABLED(CONFIG_I2C_IMX) /* setup Port AS Pin Assignment Register for I2C */ /* set PASPA0 to SCL and PASPA1 to SDA */ u8 r = readb(MCFGPIO_PAR_FECI2C); r |= 0x0f; writeb(r, MCFGPIO_PAR_FECI2C); #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ } /***************************************************************************/ static void __init m53xx_uarts_init(void) { /* UART GPIO initialization */ writew(readw(MCFGPIO_PAR_UART) | 0x0FFF, MCFGPIO_PAR_UART); } /***************************************************************************/ static void __init m53xx_fec_init(void) { u8 v; /* Set multi-function pins to ethernet mode for fec0 */ v = readb(MCFGPIO_PAR_FECI2C); v |= MCF_GPIO_PAR_FECI2C_PAR_MDC_EMDC | MCF_GPIO_PAR_FECI2C_PAR_MDIO_EMDIO; writeb(v, MCFGPIO_PAR_FECI2C); v = readb(MCFGPIO_PAR_FEC); v = MCF_GPIO_PAR_FEC_PAR_FEC_7W_FEC | MCF_GPIO_PAR_FEC_PAR_FEC_MII_FEC; writeb(v, MCFGPIO_PAR_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; m53xx_clk_init(); m53xx_uarts_init(); m53xx_fec_init(); m53xx_qspi_init(); m53xx_i2c_init(); #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) 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) { clock_pll(0, 0); wtm_init(); scm_init(); gpio_init(); fbcs_init(); sdramc_init(); } void wtm_init(void) { /* Disable watchdog timer */ writew(0, MCF_WTM_WCR); } #define MCF_SCM_BCR_GBW (0x00000100) #define MCF_SCM_BCR_GBR (0x00000200) void scm_init(void) { /* All masters are trusted */ writel(0x77777777, MCF_SCM_MPR); /* Allow supervisor/user, read/write, and trusted/untrusted access to all slaves */ writel(0, MCF_SCM_PACRA); writel(0, MCF_SCM_PACRB); writel(0, MCF_SCM_PACRC); writel(0, MCF_SCM_PACRD); writel(0, MCF_SCM_PACRE); writel(0, MCF_SCM_PACRF); /* Enable bursts */ writel(MCF_SCM_BCR_GBR | MCF_SCM_BCR_GBW, MCF_SCM_BCR); } void fbcs_init(void) { writeb(0x3E, MCFGPIO_PAR_CS); /* Latch chip select */ writel(0x10080000, MCF_FBCS1_CSAR); writel(0x002A3780, MCF_FBCS1_CSCR); writel(MCF_FBCS_CSMR_BAM_2M | MCF_FBCS_CSMR_V, MCF_FBCS1_CSMR); /* Initialize latch to drive signals to inactive states */ writew(0xffff, 0x10080000); /* External SRAM */ writel(EXT_SRAM_ADDRESS, MCF_FBCS1_CSAR); writel(MCF_FBCS_CSCR_PS_16 | MCF_FBCS_CSCR_AA | MCF_FBCS_CSCR_SBM | MCF_FBCS_CSCR_WS(1), MCF_FBCS1_CSCR); writel(MCF_FBCS_CSMR_BAM_512K | MCF_FBCS_CSMR_V, MCF_FBCS1_CSMR); /* Boot Flash connected to FBCS0 */ writel(FLASH_ADDRESS, MCF_FBCS0_CSAR); writel(MCF_FBCS_CSCR_PS_16 | MCF_FBCS_CSCR_BEM | MCF_FBCS_CSCR_AA | MCF_FBCS_CSCR_SBM | MCF_FBCS_CSCR_WS(7), MCF_FBCS0_CSCR); writel(MCF_FBCS_CSMR_BAM_32M | MCF_FBCS_CSMR_V, MCF_FBCS0_CSMR); } void sdramc_init(void) { /* * Check to see if the SDRAM has already been initialized * by a run control tool */ if (!(readl(MCF_SDRAMC_SDCR) & MCF_SDRAMC_SDCR_REF)) { /* SDRAM chip select initialization */ /* Initialize SDRAM chip select */ writel(MCF_SDRAMC_SDCS_BA(SDRAM_ADDRESS) | MCF_SDRAMC_SDCS_CSSZ(MCF_SDRAMC_SDCS_CSSZ_32MBYTE), MCF_SDRAMC_SDCS0); /* * Basic configuration and initialization */ writel(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_SDCFG1); writel(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), MCF_SDRAMC_SDCFG2); /* * Precharge and enable write to SDMR */ writel(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, MCF_SDRAMC_SDCR); /* * Write extended mode register */ writel(MCF_SDRAMC_SDMR_BNKAD_LEMR | MCF_SDRAMC_SDMR_AD(0x0) | MCF_SDRAMC_SDMR_CMD, MCF_SDRAMC_SDMR); /* * Write mode register and reset DLL */ writel(MCF_SDRAMC_SDMR_BNKAD_LMR | MCF_SDRAMC_SDMR_AD(0x163) | MCF_SDRAMC_SDMR_CMD, MCF_SDRAMC_SDMR); /* * Execute a PALL command */ writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_IPALL, MCF_SDRAMC_SDCR); /* * Perform two REF cycles */ writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_IREF, MCF_SDRAMC_SDCR); writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_IREF, MCF_SDRAMC_SDCR); /* * Write mode register and clear reset DLL */ writel(MCF_SDRAMC_SDMR_BNKAD_LMR | MCF_SDRAMC_SDMR_AD(0x063) | MCF_SDRAMC_SDMR_CMD, MCF_SDRAMC_SDMR); /* * Enable auto refresh and lock SDMR */ writel(readl(MCF_SDRAMC_SDCR) & ~MCF_SDRAMC_SDCR_MODE_EN, MCF_SDRAMC_SDCR); writel(MCF_SDRAMC_SDCR_REF | MCF_SDRAMC_SDCR_DQS_OE(0xC), MCF_SDRAMC_SDCR); } } void gpio_init(void) { /* Enable UART0 pins */ writew(MCF_GPIO_PAR_UART_PAR_URXD0 | MCF_GPIO_PAR_UART_PAR_UTXD0, MCFGPIO_PAR_UART); /* * Initialize TIN3 as a GPIO output to enable the write * half of the latch. */ writeb(0x00, MCFGPIO_PAR_TIMER); writeb(0x08, MCFGPIO_PDDR_TIMER); 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 = readb(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 (readl(MCF_SDRAMC_SDCR) & MCF_SDRAMC_SDCR_REF) /* Put SDRAM into self refresh mode */ writel(readl(MCF_SDRAMC_SDCR) & ~MCF_SDRAMC_SDCR_CKE, MCF_SDRAMC_SDCR); /* * 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 */ writeb(MCF_PLL_PODR_CPUDIV(BUSDIV/3) | MCF_PLL_PODR_BUSDIV(BUSDIV), MCF_PLL_PODR); writeb(mfd, MCF_PLL_PFDR); /* Exit LIMP mode */ clock_exit_limp(); /* * Return the SDRAM to normal operation if it is in use. */ if (readl(MCF_SDRAMC_SDCR) & MCF_SDRAMC_SDCR_REF) /* Exit self refresh mode */ writel(readl(MCF_SDRAMC_SDCR) | MCF_SDRAMC_SDCR_CKE, MCF_SDRAMC_SDCR); /* Errata - workaround for SDRAM opeartion after exiting LIMP mode */ writel(MCF_SDRAMC_REFRESH, MCF_SDRAMC_LIMP_FIX); /* 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 = readw(MCF_CCM_CDR) & MCF_CCM_CDR_SSIDIV(0xF); /* Apply the divider to the system clock */ writew(MCF_CCM_CDR_LPDIV(div) | MCF_CCM_CDR_SSIDIV(temp), MCF_CCM_CDR); writew(readw(MCF_CCM_MISCCR) | MCF_CCM_MISCCR_LIMP, MCF_CCM_MISCCR); return (FREF/(3*(1 << div))); } int clock_exit_limp(void) { int fout; /* Exit LIMP mode */ writew(readw(MCF_CCM_MISCCR) & ~MCF_CCM_MISCCR_LIMP, MCF_CCM_MISCCR); /* Wait for PLL to lock */ while (!(readw(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 (readw(MCF_CCM_MISCCR) & MCF_CCM_MISCCR_LIMP) { divider = readw(MCF_CCM_CDR) & MCF_CCM_CDR_LPDIV(0xF); return (FREF/(2 << divider)); } else return (FREF * readb(MCF_PLL_PFDR)) / (BUSDIV * 4); }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1