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Diffstat (limited to 'arch/ppc/platforms/lite5200.c')
| -rw-r--r-- | arch/ppc/platforms/lite5200.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/arch/ppc/platforms/lite5200.c b/arch/ppc/platforms/lite5200.c new file mode 100644 index 000000000000..b604cf8b3cae --- /dev/null +++ b/arch/ppc/platforms/lite5200.c @@ -0,0 +1,236 @@ +/* + * arch/ppc/platforms/lite5200.c + * + * Platform support file for the Freescale LITE5200 based on MPC52xx. + * A maximum of this file should be moved to syslib/mpc52xx_????? + * so that new platform based on MPC52xx need a minimal platform file + * ( avoid code duplication ) + * + * + * Maintainer : Sylvain Munaut <tnt@246tNt.com> + * + * Based on the 2.4 code written by Kent Borg, + * Dale Farnsworth <dale.farnsworth@mvista.com> and + * Wolfgang Denk <wd@denx.de> + * + * Copyright 2004-2005 Sylvain Munaut <tnt@246tNt.com> + * Copyright 2003 Motorola Inc. + * Copyright 2003 MontaVista Software Inc. + * Copyright 2003 DENX Software Engineering (wd@denx.de) + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/config.h> +#include <linux/initrd.h> +#include <linux/seq_file.h> +#include <linux/kdev_t.h> +#include <linux/root_dev.h> +#include <linux/console.h> +#include <linux/module.h> + +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/mpc52xx.h> +#include <asm/ppc_sys.h> + +#include <syslib/mpc52xx_pci.h> + + +extern int powersave_nap; + +/* Board data given by U-Boot */ +bd_t __res; +EXPORT_SYMBOL(__res); /* For modules */ + + +/* ======================================================================== */ +/* Platform specific code */ +/* ======================================================================== */ + +/* Supported PSC function in "preference" order */ +struct mpc52xx_psc_func mpc52xx_psc_functions[] = { + { .id = 0, + .func = "uart", + }, + { .id = -1, /* End entry */ + .func = NULL, + } + }; + + +static int +lite5200_show_cpuinfo(struct seq_file *m) +{ + seq_printf(m, "machine\t\t: Freescale LITE5200\n"); + return 0; +} + +#ifdef CONFIG_PCI +static int +lite5200_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin) +{ + return (pin == 1) && (idsel==24) ? MPC52xx_IRQ0 : -1; +} +#endif + +static void __init +lite5200_setup_cpu(void) +{ + struct mpc52xx_cdm __iomem *cdm; + struct mpc52xx_gpio __iomem *gpio; + struct mpc52xx_intr __iomem *intr; + struct mpc52xx_xlb __iomem *xlb; + + u32 port_config; + u32 intr_ctrl; + + /* Map zones */ + cdm = ioremap(MPC52xx_PA(MPC52xx_CDM_OFFSET), MPC52xx_CDM_SIZE); + gpio = ioremap(MPC52xx_PA(MPC52xx_GPIO_OFFSET), MPC52xx_GPIO_SIZE); + xlb = ioremap(MPC52xx_PA(MPC52xx_XLB_OFFSET), MPC52xx_XLB_SIZE); + intr = ioremap(MPC52xx_PA(MPC52xx_INTR_OFFSET), MPC52xx_INTR_SIZE); + + if (!cdm || !gpio || !xlb || !intr) { + printk("lite5200.c: Error while mapping CDM/GPIO/XLB/INTR during" + "lite5200_setup_cpu\n"); + goto unmap_regs; + } + + /* Use internal 48 Mhz */ + out_8(&cdm->ext_48mhz_en, 0x00); + out_8(&cdm->fd_enable, 0x01); + if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */ + out_be16(&cdm->fd_counters, 0x0001); + else + out_be16(&cdm->fd_counters, 0x5555); + + /* Get port mux config */ + port_config = in_be32(&gpio->port_config); + + /* 48Mhz internal, pin is GPIO */ + port_config &= ~0x00800000; + + /* USB port */ + port_config &= ~0x00007000; /* Differential mode - USB1 only */ + port_config |= 0x00001000; + + /* Commit port config */ + out_be32(&gpio->port_config, port_config); + + /* Configure the XLB Arbiter */ + out_be32(&xlb->master_pri_enable, 0xff); + out_be32(&xlb->master_priority, 0x11111111); + + /* Enable ram snooping for 1GB window */ + out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_SNOOP); + out_be32(&xlb->snoop_window, MPC52xx_PCI_TARGET_MEM | 0x1d); + + /* IRQ[0-3] setup : IRQ0 - Level Active Low */ + /* IRQ[1-3] - Level Active High */ + intr_ctrl = in_be32(&intr->ctrl); + intr_ctrl &= ~0x00ff0000; + intr_ctrl |= 0x00c00000; + out_be32(&intr->ctrl, intr_ctrl); + + /* Unmap reg zone */ +unmap_regs: + if (cdm) iounmap(cdm); + if (gpio) iounmap(gpio); + if (xlb) iounmap(xlb); + if (intr) iounmap(intr); +} + +static void __init +lite5200_setup_arch(void) +{ + /* CPU & Port mux setup */ + lite5200_setup_cpu(); + +#ifdef CONFIG_PCI + /* PCI Bridge setup */ + mpc52xx_find_bridges(); +#endif +} + +void __init +platform_init(unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7) +{ + /* Generic MPC52xx platform initialization */ + /* TODO Create one and move a max of stuff in it. + Put this init in the syslib */ + + struct bi_record *bootinfo = find_bootinfo(); + + if (bootinfo) + parse_bootinfo(bootinfo); + else { + /* Load the bd_t board info structure */ + if (r3) + memcpy((void*)&__res,(void*)(r3+KERNELBASE), + sizeof(bd_t)); + +#ifdef CONFIG_BLK_DEV_INITRD + /* Load the initrd */ + if (r4) { + initrd_start = r4 + KERNELBASE; + initrd_end = r5 + KERNELBASE; + } +#endif + + /* Load the command line */ + if (r6) { + *(char *)(r7+KERNELBASE) = 0; + strcpy(cmd_line, (char *)(r6+KERNELBASE)); + } + } + + /* PPC Sys identification */ + identify_ppc_sys_by_id(mfspr(SPRN_SVR)); + + /* BAT setup */ + mpc52xx_set_bat(); + + /* No ISA bus by default */ + isa_io_base = 0; + isa_mem_base = 0; + + /* Powersave */ + /* This is provided as an example on how to do it. But you + need to be aware that NAP disable bus snoop and that may + be required for some devices to work properly, like USB ... */ + /* powersave_nap = 1; */ + + + /* Setup the ppc_md struct */ + ppc_md.setup_arch = lite5200_setup_arch; + ppc_md.show_cpuinfo = lite5200_show_cpuinfo; + ppc_md.show_percpuinfo = NULL; + ppc_md.init_IRQ = mpc52xx_init_irq; + ppc_md.get_irq = mpc52xx_get_irq; + +#ifdef CONFIG_PCI + ppc_md.pci_map_irq = lite5200_map_irq; +#endif + + ppc_md.find_end_of_memory = mpc52xx_find_end_of_memory; + ppc_md.setup_io_mappings = mpc52xx_map_io; + + ppc_md.restart = mpc52xx_restart; + ppc_md.power_off = mpc52xx_power_off; + ppc_md.halt = mpc52xx_halt; + + /* No time keeper on the LITE5200 */ + ppc_md.time_init = NULL; + ppc_md.get_rtc_time = NULL; + ppc_md.set_rtc_time = NULL; + + ppc_md.calibrate_decr = mpc52xx_calibrate_decr; +#ifdef CONFIG_SERIAL_TEXT_DEBUG + ppc_md.progress = mpc52xx_progress; +#endif +} + |