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9b41fcb0eb
Commit 69331af, "Fixes and cleanups for earlyprintk aka boot console",
resulted in printk output prior to the initialization of the mpsc
console driver not being printed. That commit causes the mpsc's
CON_PRINTBUFFER flag to be cleared since udbg should have printed
the previous output.
I guess we can no longer ignore udbg. :)
This patch provides udbg_putc() and udbg_getc() functions for the
Marvell mv64x60 chips. These functions are enabled if an mv64x60
port is to be used as the console as determined from the device tree.
Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
/*
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* Board setup routines for the Motorola PrPMC2800
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*
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* Author: Dale Farnsworth <dale@farnsworth.org>
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*
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* 2007 (c) MontaVista, Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/seq_file.h>
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#include <asm/machdep.h>
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#include <asm/prom.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/kexec.h>
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#include <mm/mmu_decl.h>
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#include <sysdev/mv64x60.h>
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#define MV64x60_MPP_CNTL_0 0x0000
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#define MV64x60_MPP_CNTL_2 0x0008
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#define MV64x60_GPP_IO_CNTL 0x0000
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#define MV64x60_GPP_LEVEL_CNTL 0x0010
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#define MV64x60_GPP_VALUE_SET 0x0018
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#define PLATFORM_NAME_MAX 32
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static char prpmc2800_platform_name[PLATFORM_NAME_MAX];
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static void __iomem *mv64x60_mpp_reg_base;
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static void __iomem *mv64x60_gpp_reg_base;
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static void __init prpmc2800_setup_arch(void)
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{
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struct device_node *np;
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phys_addr_t paddr;
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const unsigned int *reg;
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/*
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* ioremap mpp and gpp registers in case they are later
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* needed by prpmc2800_reset_board().
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*/
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np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60-mpp");
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reg = of_get_property(np, "reg", NULL);
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paddr = of_translate_address(np, reg);
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of_node_put(np);
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mv64x60_mpp_reg_base = ioremap(paddr, reg[1]);
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np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60-gpp");
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reg = of_get_property(np, "reg", NULL);
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paddr = of_translate_address(np, reg);
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of_node_put(np);
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mv64x60_gpp_reg_base = ioremap(paddr, reg[1]);
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#ifdef CONFIG_PCI
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mv64x60_pci_init();
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#endif
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printk("Motorola %s\n", prpmc2800_platform_name);
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}
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static void prpmc2800_reset_board(void)
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{
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u32 temp;
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local_irq_disable();
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temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0);
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temp &= 0xFFFF0FFF;
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out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_0, temp);
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temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
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temp |= 0x00000004;
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out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
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temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
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temp |= 0x00000004;
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out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
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temp = in_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2);
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temp &= 0xFFFF0FFF;
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out_le32(mv64x60_mpp_reg_base + MV64x60_MPP_CNTL_2, temp);
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temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL);
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temp |= 0x00080000;
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out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_LEVEL_CNTL, temp);
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temp = in_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL);
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temp |= 0x00080000;
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out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_IO_CNTL, temp);
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out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_VALUE_SET, 0x00080004);
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}
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static void prpmc2800_restart(char *cmd)
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{
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volatile ulong i = 10000000;
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prpmc2800_reset_board();
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while (i-- > 0);
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panic("restart failed\n");
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}
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#ifdef CONFIG_NOT_COHERENT_CACHE
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#define PPRPM2800_COHERENCY_SETTING "off"
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#else
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#define PPRPM2800_COHERENCY_SETTING "on"
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#endif
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void prpmc2800_show_cpuinfo(struct seq_file *m)
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{
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uint memsize = total_memory;
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seq_printf(m, "Vendor\t\t: Motorola\n");
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seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
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seq_printf(m, "coherency\t: %s\n", PPRPM2800_COHERENCY_SETTING);
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}
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init prpmc2800_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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unsigned long len = PLATFORM_NAME_MAX;
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void *m;
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if (!of_flat_dt_is_compatible(root, "motorola,PrPMC2800"))
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return 0;
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/* Update ppc_md.name with name from dt */
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m = of_get_flat_dt_prop(root, "model", &len);
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if (m)
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strncpy(prpmc2800_platform_name, m,
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min((int)len, PLATFORM_NAME_MAX - 1));
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return 1;
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}
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define_machine(prpmc2800){
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.name = prpmc2800_platform_name,
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.probe = prpmc2800_probe,
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.setup_arch = prpmc2800_setup_arch,
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.init_early = mv64x60_init_early,
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.show_cpuinfo = prpmc2800_show_cpuinfo,
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.init_IRQ = mv64x60_init_irq,
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.get_irq = mv64x60_get_irq,
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.restart = prpmc2800_restart,
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.calibrate_decr = generic_calibrate_decr,
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#ifdef CONFIG_KEXEC
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.machine_kexec = default_machine_kexec,
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.machine_kexec_prepare = default_machine_kexec_prepare,
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.machine_crash_shutdown = default_machine_crash_shutdown,
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#endif
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};
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