diff options
Diffstat (limited to 'arch/powerpc/platforms/embedded6xx/c2k.c')
| -rw-r--r-- | arch/powerpc/platforms/embedded6xx/c2k.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/embedded6xx/c2k.c b/arch/powerpc/platforms/embedded6xx/c2k.c new file mode 100644 index 000000000000..d0b25b8c39d1 --- /dev/null +++ b/arch/powerpc/platforms/embedded6xx/c2k.c @@ -0,0 +1,158 @@ +/* + * Board setup routines for the GEFanuc C2K board + * + * Author: Remi Machet <rmachet@slac.stanford.edu> + * + * Originated from prpmc2800.c + * + * 2008 (c) Stanford University + * 2007 (c) MontaVista, Software, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <linux/stddef.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/seq_file.h> +#include <linux/time.h> +#include <linux/of.h> +#include <linux/kexec.h> + +#include <asm/machdep.h> +#include <asm/prom.h> +#include <asm/system.h> +#include <asm/time.h> + +#include <mm/mmu_decl.h> + +#include <sysdev/mv64x60.h> + +#define MV64x60_MPP_CNTL_0 0x0000 +#define MV64x60_MPP_CNTL_2 0x0008 + +#define MV64x60_GPP_IO_CNTL 0x0000 +#define MV64x60_GPP_LEVEL_CNTL 0x0010 +#define MV64x60_GPP_VALUE_SET 0x0018 + +static void __iomem *mv64x60_mpp_reg_base; +static void __iomem *mv64x60_gpp_reg_base; + +static void __init c2k_setup_arch(void) +{ + struct device_node *np; + phys_addr_t paddr; + const unsigned int *reg; + + /* + * ioremap mpp and gpp registers in case they are later + * needed by c2k_reset_board(). + */ + np = of_find_compatible_node(NULL, NULL, "marvell,mv64360-mpp"); + reg = of_get_property(np, "reg", NULL); + paddr = of_translate_address(np, reg); + of_node_put(np); + mv64x60_mpp_reg_base = ioremap(paddr, reg[1]); + + np = of_find_compatible_node(NULL, NULL, "marvell,mv64360-gpp"); + reg = of_get_property(np, "reg", NULL); + paddr = of_translate_address(np, reg); + of_node_put(np); + mv64x60_gpp_reg_base = ioremap(paddr, reg[1]); + +#ifdef CONFIG_PCI + mv64x60_pci_init(); +#endif +} + +static void c2k_reset_board(void) +{ + u32 temp; + + local_irq_disable(); + + temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0); + temp &= 0xFFFF0FFF; + out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0, temp); + + temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL); + temp |= 0x00000004; + out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp); + + temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL); + temp |= 0x00000004; + out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp); + + temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2); + temp &= 0xFFFF0FFF; + out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2, temp); + + temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL); + temp |= 0x00080000; + out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp); + + temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL); + temp |= 0x00080000; + out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp); + + out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_VALUE_SET, 0x00080004); +} + +static void c2k_restart(char *cmd) +{ + c2k_reset_board(); + msleep(100); + panic("restart failed\n"); +} + +#ifdef CONFIG_NOT_COHERENT_CACHE +#define COHERENCY_SETTING "off" +#else +#define COHERENCY_SETTING "on" +#endif + +void c2k_show_cpuinfo(struct seq_file *m) +{ + uint memsize = total_memory; + + seq_printf(m, "Vendor\t\t: GEFanuc\n"); + seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024)); + seq_printf(m, "coherency\t: %s\n", COHERENCY_SETTING); +} + +/* + * Called very early, device-tree isn't unflattened + */ +static int __init c2k_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + + if (!of_flat_dt_is_compatible(root, "GEFanuc,C2K")) + return 0; + + printk(KERN_INFO "Detected a GEFanuc C2K board\n"); + + _set_L2CR(0); + _set_L2CR(L2CR_L2E | L2CR_L2PE | L2CR_L2I); + return 1; +} + +define_machine(c2k) { + .name = "C2K", + .probe = c2k_probe, + .setup_arch = c2k_setup_arch, + .init_early = mv64x60_init_early, + .show_cpuinfo = c2k_show_cpuinfo, + .init_IRQ = mv64x60_init_irq, + .get_irq = mv64x60_get_irq, + .restart = c2k_restart, + .calibrate_decr = generic_calibrate_decr, +#ifdef CONFIG_KEXEC + .machine_kexec = default_machine_kexec, + .machine_kexec_prepare = default_machine_kexec_prepare, + .machine_crash_shutdown = default_machine_crash_shutdown, +#endif +}; |