diff options
Diffstat (limited to 'arch/powerpc/platforms/82xx/mgcoge.c')
| -rw-r--r-- | arch/powerpc/platforms/82xx/mgcoge.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/82xx/mgcoge.c b/arch/powerpc/platforms/82xx/mgcoge.c new file mode 100644 index 000000000000..c2af169c1d1d --- /dev/null +++ b/arch/powerpc/platforms/82xx/mgcoge.c @@ -0,0 +1,129 @@ +/* + * Keymile mgcoge support + * Copyright 2008 DENX Software Engineering GmbH + * Author: Heiko Schocher <hs@denx.de> + * + * based on code from: + * Copyright 2007 Freescale Semiconductor, Inc. + * Author: Scott Wood <scottwood@freescale.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/init.h> +#include <linux/interrupt.h> +#include <linux/fsl_devices.h> +#include <linux/of_platform.h> + +#include <asm/io.h> +#include <asm/cpm2.h> +#include <asm/udbg.h> +#include <asm/machdep.h> +#include <asm/time.h> +#include <asm/mpc8260.h> +#include <asm/prom.h> + +#include <sysdev/fsl_soc.h> +#include <sysdev/cpm2_pic.h> + +#include "pq2.h" + +static void __init mgcoge_pic_init(void) +{ + struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic"); + if (!np) { + printk(KERN_ERR "PIC init: can not find cpm-pic node\n"); + return; + } + + cpm2_pic_init(np); + of_node_put(np); +} + +struct cpm_pin { + int port, pin, flags; +}; + +static __initdata struct cpm_pin mgcoge_pins[] = { + + /* SMC2 */ + {1, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {1, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, + + /* SCC4 */ + {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {3, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {3, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {3, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {4, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, + {4, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, +}; + +static void __init init_ioports(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mgcoge_pins); i++) { + const struct cpm_pin *pin = &mgcoge_pins[i]; + cpm2_set_pin(pin->port - 1, pin->pin, pin->flags); + } + + cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8); + cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX); + cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX); +} + +static void __init mgcoge_setup_arch(void) +{ + if (ppc_md.progress) + ppc_md.progress("mgcoge_setup_arch()", 0); + + cpm2_reset(); + + /* When this is set, snooping CPM DMA from RAM causes + * machine checks. See erratum SIU18. + */ + clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP); + + init_ioports(); + + if (ppc_md.progress) + ppc_md.progress("mgcoge_setup_arch(), finish", 0); +} + +static __initdata struct of_device_id of_bus_ids[] = { + { .compatible = "simple-bus", }, + {}, +}; + +static int __init declare_of_platform_devices(void) +{ + of_platform_bus_probe(NULL, of_bus_ids, NULL); + + return 0; +} +machine_device_initcall(mgcoge, declare_of_platform_devices); + +/* + * Called very early, device-tree isn't unflattened + */ +static int __init mgcoge_probe(void) +{ + unsigned long root = of_get_flat_dt_root(); + return of_flat_dt_is_compatible(root, "keymile,mgcoge"); +} + +define_machine(mgcoge) +{ + .name = "Keymile MGCOGE", + .probe = mgcoge_probe, + .setup_arch = mgcoge_setup_arch, + .init_IRQ = mgcoge_pic_init, + .get_irq = cpm2_get_irq, + .calibrate_decr = generic_calibrate_decr, + .restart = pq2_restart, + .progress = udbg_progress, +}; |