/***************************************************************************/ /* * 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 * * 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 #include #include #include #include #include #include #include #include #include #include #include #include /***************************************************************************/ static struct resource m532x_fec_resources[] = { { .start = 0xfc030000, .end = 0xfc0307ff, .flags = IORESOURCE_MEM, }, { .start = 64 + 36, .end = 64 + 36, .flags = IORESOURCE_IRQ, }, { .start = 64 + 40, .end = 64 + 40, .flags = IORESOURCE_IRQ, }, { .start = 64 + 42, .end = 64 + 42, .flags = IORESOURCE_IRQ, }, }; static struct platform_device m532x_fec = { .name = "fec", .id = 0, .num_resources = ARRAY_SIZE(m532x_fec_resources), .resource = m532x_fec_resources, }; #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) static struct resource m532x_qspi_resources[] = { { .start = MCFQSPI_IOBASE, .end = MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1, .flags = IORESOURCE_MEM, }, { .start = MCFINT_VECBASE + MCFINT_QSPI, .end = MCFINT_VECBASE + MCFINT_QSPI, .flags = IORESOURCE_IRQ, }, }; #define MCFQSPI_CS0 84 #define MCFQSPI_CS1 85 #define MCFQSPI_CS2 86 static int m532x_cs_setup(struct mcfqspi_cs_control *cs_control) { int status; status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0"); if (status) { pr_debug("gpio_request for MCFQSPI_CS0 failed\n"); goto fail0; } status = gpio_direction_output(MCFQSPI_CS0, 1); if (status) { pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n"); goto fail1; } status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1"); if (status) { pr_debug("gpio_request for MCFQSPI_CS1 failed\n"); goto fail1; } status = gpio_direction_output(MCFQSPI_CS1, 1); if (status) { pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n"); goto fail2; } status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2"); if (status) { pr_debug("gpio_request for MCFQSPI_CS2 failed\n"); goto fail2; } status = gpio_direction_output(MCFQSPI_CS2, 1); if (status) { pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n"); goto fail3; } return 0; fail3: gpio_free(MCFQSPI_CS2); fail2: gpio_free(MCFQSPI_CS1); fail1: gpio_free(MCFQSPI_CS0); fail0: return status; } static void m532x_cs_teardown(struct mcfqspi_cs_control *cs_control) { gpio_free(MCFQSPI_CS2); gpio_free(MCFQSPI_CS1); gpio_free(MCFQSPI_CS0); } static void m532x_cs_select(struct mcfqspi_cs_control *cs_control, u8 chip_select, bool cs_high) { gpio_set_value(MCFQSPI_CS0 + chip_select, cs_high); } static void m532x_cs_deselect(struct mcfqspi_cs_control *cs_control, u8 chip_select, bool cs_high) { gpio_set_value(MCFQSPI_CS0 + chip_select, !cs_high); } static struct mcfqspi_cs_control m532x_cs_control = { .setup = m532x_cs_setup, .teardown = m532x_cs_teardown, .select = m532x_cs_select, .deselect = m532x_cs_deselect, }; static struct mcfqspi_platform_data m532x_qspi_data = { .bus_num = 0, .num_chipselect = 3, .cs_control = &m532x_cs_control, }; static struct platform_device m532x_qspi = { .name = "mcfqspi", .id = 0, .num_resources = ARRAY_SIZE(m532x_qspi_resources), .resource = m532x_qspi_resources, .dev.platform_data = &m532x_qspi_data, }; static void __init m532x_qspi_init(void) { /* setup QSPS pins for QSPI with gpio CS control */ writew(0x01f0, MCF_GPIO_PAR_QSPI); } #endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */ static struct platform_device *m532x_devices[] __initdata = { &m532x_fec, #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) &m532x_qspi, #endif }; /***************************************************************************/ 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); } /***************************************************************************/ static void m532x_cpu_reset(void) { local_irq_disable(); __raw_writeb(MCF_RCR_SWRESET, MCF_RCR); } /***************************************************************************/ 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; #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 } /***************************************************************************/ static int __init init_BSP(void) { m532x_uarts_init(); m532x_fec_init(); #if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) m532x_qspi_init(); #endif platform_add_devices(m532x_devices, ARRAY_SIZE(m532x_devices)); return 0; } arch_initcall(init_BSP); /***************************************************************************/ /* 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)); }