diff options
Diffstat (limited to 'arch/mips/tx4938/common')
| -rw-r--r-- | arch/mips/tx4938/common/Makefile | 11 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/dbgio.c | 50 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/irq.c | 424 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/irq_handler.S | 84 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/prom.c | 129 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/rtc_rx5c348.c | 202 | ||||
| -rw-r--r-- | arch/mips/tx4938/common/setup.c | 91 |
7 files changed, 991 insertions, 0 deletions
diff --git a/arch/mips/tx4938/common/Makefile b/arch/mips/tx4938/common/Makefile new file mode 100644 index 000000000000..74c95c5bcdbf --- /dev/null +++ b/arch/mips/tx4938/common/Makefile @@ -0,0 +1,11 @@ +# +# Makefile for common code for Toshiba TX4927 based systems +# +# Note! Dependencies are done automagically by 'make dep', which also +# removes any old dependencies. DON'T put your own dependencies here +# unless it's something special (ie not a .c file). +# + +obj-y += prom.o setup.o irq.o irq_handler.o rtc_rx5c348.o +obj-$(CONFIG_KGDB) += dbgio.o + diff --git a/arch/mips/tx4938/common/dbgio.c b/arch/mips/tx4938/common/dbgio.c new file mode 100644 index 000000000000..bea59ff1842a --- /dev/null +++ b/arch/mips/tx4938/common/dbgio.c @@ -0,0 +1,50 @@ +/* + * linux/arch/mips/tx4938/common/dbgio.c + * + * kgdb interface for gdb + * + * Author: MontaVista Software, Inc. + * source@mvista.com + * + * Copyright 2005 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 as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Support for TX4938 in 2.6 - Hiroshi DOYU <Hiroshi_DOYU@montavista.co.jp> + */ + +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/tx4938/tx4938_mips.h> + +extern u8 txx9_sio_kdbg_rd(void); +extern int txx9_sio_kdbg_wr( u8 ch ); + +u8 getDebugChar(void) +{ + return (txx9_sio_kdbg_rd()); +} + +int putDebugChar(u8 byte) +{ + return (txx9_sio_kdbg_wr(byte)); +} + diff --git a/arch/mips/tx4938/common/irq.c b/arch/mips/tx4938/common/irq.c new file mode 100644 index 000000000000..4f90d7faf634 --- /dev/null +++ b/arch/mips/tx4938/common/irq.c @@ -0,0 +1,424 @@ +/* + * linux/arch/mps/tx4938/common/irq.c + * + * Common tx4938 irq handler + * Copyright (C) 2000-2001 Toshiba Corporation + * + * 2003-2005 (c) MontaVista Software, Inc. 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. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/irq.h> +#include <asm/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/tx4938/rbtx4938.h> + +/**********************************************************************************/ +/* Forwad definitions for all pic's */ +/**********************************************************************************/ + +static unsigned int tx4938_irq_cp0_startup(unsigned int irq); +static void tx4938_irq_cp0_shutdown(unsigned int irq); +static void tx4938_irq_cp0_enable(unsigned int irq); +static void tx4938_irq_cp0_disable(unsigned int irq); +static void tx4938_irq_cp0_mask_and_ack(unsigned int irq); +static void tx4938_irq_cp0_end(unsigned int irq); + +static unsigned int tx4938_irq_pic_startup(unsigned int irq); +static void tx4938_irq_pic_shutdown(unsigned int irq); +static void tx4938_irq_pic_enable(unsigned int irq); +static void tx4938_irq_pic_disable(unsigned int irq); +static void tx4938_irq_pic_mask_and_ack(unsigned int irq); +static void tx4938_irq_pic_end(unsigned int irq); + +/**********************************************************************************/ +/* Kernel structs for all pic's */ +/**********************************************************************************/ +DEFINE_SPINLOCK(tx4938_cp0_lock); +DEFINE_SPINLOCK(tx4938_pic_lock); + +#define TX4938_CP0_NAME "TX4938-CP0" +static struct hw_interrupt_type tx4938_irq_cp0_type = { + .typename = TX4938_CP0_NAME, + .startup = tx4938_irq_cp0_startup, + .shutdown = tx4938_irq_cp0_shutdown, + .enable = tx4938_irq_cp0_enable, + .disable = tx4938_irq_cp0_disable, + .ack = tx4938_irq_cp0_mask_and_ack, + .end = tx4938_irq_cp0_end, + .set_affinity = NULL +}; + +#define TX4938_PIC_NAME "TX4938-PIC" +static struct hw_interrupt_type tx4938_irq_pic_type = { + .typename = TX4938_PIC_NAME, + .startup = tx4938_irq_pic_startup, + .shutdown = tx4938_irq_pic_shutdown, + .enable = tx4938_irq_pic_enable, + .disable = tx4938_irq_pic_disable, + .ack = tx4938_irq_pic_mask_and_ack, + .end = tx4938_irq_pic_end, + .set_affinity = NULL +}; + +static struct irqaction tx4938_irq_pic_action = { + .handler = no_action, + .flags = 0, + .mask = CPU_MASK_NONE, + .name = TX4938_PIC_NAME +}; + +/**********************************************************************************/ +/* Functions for cp0 */ +/**********************************************************************************/ + +#define tx4938_irq_cp0_mask(irq) ( 1 << ( irq-TX4938_IRQ_CP0_BEG+8 ) ) + +static void __init +tx4938_irq_cp0_init(void) +{ + int i; + + for (i = TX4938_IRQ_CP0_BEG; i <= TX4938_IRQ_CP0_END; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = 0; + irq_desc[i].depth = 1; + irq_desc[i].handler = &tx4938_irq_cp0_type; + } + + return; +} + +static unsigned int +tx4938_irq_cp0_startup(unsigned int irq) +{ + tx4938_irq_cp0_enable(irq); + + return (0); +} + +static void +tx4938_irq_cp0_shutdown(unsigned int irq) +{ + tx4938_irq_cp0_disable(irq); +} + +static void +tx4938_irq_cp0_enable(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&tx4938_cp0_lock, flags); + + set_c0_status(tx4938_irq_cp0_mask(irq)); + + spin_unlock_irqrestore(&tx4938_cp0_lock, flags); +} + +static void +tx4938_irq_cp0_disable(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&tx4938_cp0_lock, flags); + + clear_c0_status(tx4938_irq_cp0_mask(irq)); + + spin_unlock_irqrestore(&tx4938_cp0_lock, flags); + + return; +} + +static void +tx4938_irq_cp0_mask_and_ack(unsigned int irq) +{ + tx4938_irq_cp0_disable(irq); + + return; +} + +static void +tx4938_irq_cp0_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { + tx4938_irq_cp0_enable(irq); + } + + return; +} + +/**********************************************************************************/ +/* Functions for pic */ +/**********************************************************************************/ + +u32 +tx4938_irq_pic_addr(int irq) +{ + /* MVMCP -- need to formulize this */ + irq -= TX4938_IRQ_PIC_BEG; + + switch (irq) { + case 17: + case 16: + case 1: + case 0:{ + return (TX4938_MKA(TX4938_IRC_IRLVL0)); + } + case 19: + case 18: + case 3: + case 2:{ + return (TX4938_MKA(TX4938_IRC_IRLVL1)); + } + case 21: + case 20: + case 5: + case 4:{ + return (TX4938_MKA(TX4938_IRC_IRLVL2)); + } + case 23: + case 22: + case 7: + case 6:{ + return (TX4938_MKA(TX4938_IRC_IRLVL3)); + } + case 25: + case 24: + case 9: + case 8:{ + return (TX4938_MKA(TX4938_IRC_IRLVL4)); + } + case 27: + case 26: + case 11: + case 10:{ + return (TX4938_MKA(TX4938_IRC_IRLVL5)); + } + case 29: + case 28: + case 13: + case 12:{ + return (TX4938_MKA(TX4938_IRC_IRLVL6)); + } + case 31: + case 30: + case 15: + case 14:{ + return (TX4938_MKA(TX4938_IRC_IRLVL7)); + } + } + + return (0); +} + +u32 +tx4938_irq_pic_mask(int irq) +{ + /* MVMCP -- need to formulize this */ + irq -= TX4938_IRQ_PIC_BEG; + + switch (irq) { + case 31: + case 29: + case 27: + case 25: + case 23: + case 21: + case 19: + case 17:{ + return (0x07000000); + } + case 30: + case 28: + case 26: + case 24: + case 22: + case 20: + case 18: + case 16:{ + return (0x00070000); + } + case 15: + case 13: + case 11: + case 9: + case 7: + case 5: + case 3: + case 1:{ + return (0x00000700); + } + case 14: + case 12: + case 10: + case 8: + case 6: + case 4: + case 2: + case 0:{ + return (0x00000007); + } + } + return (0x00000000); +} + +static void +tx4938_irq_pic_modify(unsigned pic_reg, unsigned clr_bits, unsigned set_bits) +{ + unsigned long val = 0; + + val = TX4938_RD(pic_reg); + val &= (~clr_bits); + val |= (set_bits); + TX4938_WR(pic_reg, val); + mmiowb(); + TX4938_RD(pic_reg); + + return; +} + +static void __init +tx4938_irq_pic_init(void) +{ + unsigned long flags; + int i; + + for (i = TX4938_IRQ_PIC_BEG; i <= TX4938_IRQ_PIC_END; i++) { + irq_desc[i].status = IRQ_DISABLED; + irq_desc[i].action = 0; + irq_desc[i].depth = 2; + irq_desc[i].handler = &tx4938_irq_pic_type; + } + + setup_irq(TX4938_IRQ_NEST_PIC_ON_CP0, &tx4938_irq_pic_action); + + spin_lock_irqsave(&tx4938_pic_lock, flags); + + TX4938_WR(0xff1ff640, 0x6); /* irq level mask -- only accept hightest */ + TX4938_WR(0xff1ff600, TX4938_RD(0xff1ff600) | 0x1); /* irq enable */ + + spin_unlock_irqrestore(&tx4938_pic_lock, flags); + + return; +} + +static unsigned int +tx4938_irq_pic_startup(unsigned int irq) +{ + tx4938_irq_pic_enable(irq); + + return (0); +} + +static void +tx4938_irq_pic_shutdown(unsigned int irq) +{ + tx4938_irq_pic_disable(irq); + + return; +} + +static void +tx4938_irq_pic_enable(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&tx4938_pic_lock, flags); + + tx4938_irq_pic_modify(tx4938_irq_pic_addr(irq), 0, + tx4938_irq_pic_mask(irq)); + + spin_unlock_irqrestore(&tx4938_pic_lock, flags); + + return; +} + +static void +tx4938_irq_pic_disable(unsigned int irq) +{ + unsigned long flags; + + spin_lock_irqsave(&tx4938_pic_lock, flags); + + tx4938_irq_pic_modify(tx4938_irq_pic_addr(irq), + tx4938_irq_pic_mask(irq), 0); + + spin_unlock_irqrestore(&tx4938_pic_lock, flags); + + return; +} + +static void +tx4938_irq_pic_mask_and_ack(unsigned int irq) +{ + tx4938_irq_pic_disable(irq); + + return; +} + +static void +tx4938_irq_pic_end(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { + tx4938_irq_pic_enable(irq); + } + + return; +} + +/**********************************************************************************/ +/* Main init functions */ +/**********************************************************************************/ + +void __init +tx4938_irq_init(void) +{ + extern asmlinkage void tx4938_irq_handler(void); + + tx4938_irq_cp0_init(); + tx4938_irq_pic_init(); + set_except_vector(0, tx4938_irq_handler); + + return; +} + +int +tx4938_irq_nested(void) +{ + int sw_irq = 0; + u32 level2; + + level2 = TX4938_RD(0xff1ff6a0); + if ((level2 & 0x10000) == 0) { + level2 &= 0x1f; + sw_irq = TX4938_IRQ_PIC_BEG + level2; + if (sw_irq == 26) { + { + extern int toshiba_rbtx4938_irq_nested(int sw_irq); + sw_irq = toshiba_rbtx4938_irq_nested(sw_irq); + } + } + } + + wbflush(); + return (sw_irq); +} diff --git a/arch/mips/tx4938/common/irq_handler.S b/arch/mips/tx4938/common/irq_handler.S new file mode 100644 index 000000000000..1b2f72bac42d --- /dev/null +++ b/arch/mips/tx4938/common/irq_handler.S @@ -0,0 +1,84 @@ +/* + * linux/arch/mips/tx4938/common/handler.S + * + * Primary interrupt handler for tx4938 based systems + * Copyright (C) 2000-2001 Toshiba Corporation + * + * 2003-2005 (c) MontaVista Software, Inc. 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. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ +#include <asm/asm.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/regdef.h> +#include <asm/stackframe.h> +#include <asm/tx4938/rbtx4938.h> + + + .align 5 + NESTED(tx4938_irq_handler, PT_SIZE, sp) + SAVE_ALL + CLI + .set at + + mfc0 t0, CP0_CAUSE + mfc0 t1, CP0_STATUS + and t0, t1 + + andi t1, t0, STATUSF_IP7 /* cpu timer */ + bnez t1, ll_ip7 + + /* IP6..IP3 multiplexed -- do not use */ + + andi t1, t0, STATUSF_IP2 /* tx4938 pic */ + bnez t1, ll_ip2 + + andi t1, t0, STATUSF_IP1 /* user line 1 */ + bnez t1, ll_ip1 + + andi t1, t0, STATUSF_IP0 /* user line 0 */ + bnez t1, ll_ip0 + + .set reorder + + nop + END(tx4938_irq_handler) + + .align 5 + + +ll_ip7: + li a0, TX4938_IRQ_CPU_TIMER + move a1, sp + jal do_IRQ + j ret_from_irq + + +ll_ip2: + jal tx4938_irq_nested + nop + beqz v0, goto_spurious_interrupt + nop + move a0, v0 + move a1, sp + jal do_IRQ + j ret_from_irq + +goto_spurious_interrupt: + j ret_from_irq + +ll_ip1: + li a0, TX4938_IRQ_USER1 + move a1, sp + jal do_IRQ + j ret_from_irq + +ll_ip0: + li a0, TX4938_IRQ_USER0 + move a1, sp + jal do_IRQ + j ret_from_irq diff --git a/arch/mips/tx4938/common/prom.c b/arch/mips/tx4938/common/prom.c new file mode 100644 index 000000000000..3189a65f7d7e --- /dev/null +++ b/arch/mips/tx4938/common/prom.c @@ -0,0 +1,129 @@ +/* + * linux/arch/mips/tx4938/common/prom.c + * + * common tx4938 memory interface + * Copyright (C) 2000-2001 Toshiba Corporation + * + * 2003-2005 (c) MontaVista Software, Inc. 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. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ + +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/bootmem.h> + +#include <asm/addrspace.h> +#include <asm/bootinfo.h> +#include <asm/tx4938/tx4938.h> + +static unsigned int __init +tx4938_process_sdccr(u64 * addr) +{ + u64 val; + unsigned int sdccr_ce; + unsigned int sdccr_rs; + unsigned int sdccr_cs; + unsigned int sdccr_mw; + unsigned int rs = 0; + unsigned int cs = 0; + unsigned int mw = 0; + unsigned int bc = 4; + unsigned int msize = 0; + + val = (*((vu64 *) (addr))); + + /* MVMCP -- need #defs for these bits masks */ + sdccr_ce = ((val & (1 << 10)) >> 10); + sdccr_rs = ((val & (3 << 5)) >> 5); + sdccr_cs = ((val & (7 << 2)) >> 2); + sdccr_mw = ((val & (1 << 0)) >> 0); + + if (sdccr_ce) { + switch (sdccr_rs) { + case 0:{ + rs = 2048; + break; + } + case 1:{ + rs = 4096; + break; + } + case 2:{ + rs = 8192; + break; + } + default:{ + rs = 0; + break; + } + } + switch (sdccr_cs) { + case 0:{ + cs = 256; + break; + } + case 1:{ + cs = 512; + break; + } + case 2:{ + cs = 1024; + break; + } + case 3:{ + cs = 2048; + break; + } + case 4:{ + cs = 4096; + break; + } + default:{ + cs = 0; + break; + } + } + switch (sdccr_mw) { + case 0:{ + mw = 8; + break; + } /* 8 bytes = 64 bits */ + case 1:{ + mw = 4; + break; + } /* 4 bytes = 32 bits */ + } + } + + /* bytes per chip MB per chip bank count */ + msize = (((rs * cs * mw) / (1024 * 1024)) * (bc)); + + /* MVMCP -- bc hard coded to 4 from table 9.3.1 */ + /* boad supports bc=2 but no way to detect */ + + return (msize); +} + +unsigned int __init +tx4938_get_mem_size(void) +{ + unsigned int c0; + unsigned int c1; + unsigned int c2; + unsigned int c3; + unsigned int total; + + /* MVMCP -- need #defs for these registers */ + c0 = tx4938_process_sdccr((u64 *) 0xff1f8000); + c1 = tx4938_process_sdccr((u64 *) 0xff1f8008); + c2 = tx4938_process_sdccr((u64 *) 0xff1f8010); + c3 = tx4938_process_sdccr((u64 *) 0xff1f8018); + total = c0 + c1 + c2 + c3; + + return (total); +} diff --git a/arch/mips/tx4938/common/rtc_rx5c348.c b/arch/mips/tx4938/common/rtc_rx5c348.c new file mode 100644 index 000000000000..d249edbb6af4 --- /dev/null +++ b/arch/mips/tx4938/common/rtc_rx5c348.c @@ -0,0 +1,202 @@ +/* + * RTC routines for RICOH Rx5C348 SPI chip. + * Copyright (C) 2000-2001 Toshiba Corporation + * + * 2003-2005 (c) MontaVista Software, Inc. 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. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/rtc.h> +#include <linux/time.h> +#include <asm/time.h> +#include <asm/tx4938/spi.h> + +#define EPOCH 2000 + +/* registers */ +#define Rx5C348_REG_SECOND 0 +#define Rx5C348_REG_MINUTE 1 +#define Rx5C348_REG_HOUR 2 +#define Rx5C348_REG_WEEK 3 +#define Rx5C348_REG_DAY 4 +#define Rx5C348_REG_MONTH 5 +#define Rx5C348_REG_YEAR 6 +#define Rx5C348_REG_ADJUST 7 +#define Rx5C348_REG_ALARM_W_MIN 8 +#define Rx5C348_REG_ALARM_W_HOUR 9 +#define Rx5C348_REG_ALARM_W_WEEK 10 +#define Rx5C348_REG_ALARM_D_MIN 11 +#define Rx5C348_REG_ALARM_D_HOUR 12 +#define Rx5C348_REG_CTL1 14 +#define Rx5C348_REG_CTL2 15 + +/* register bits */ +#define Rx5C348_BIT_PM 0x20 /* REG_HOUR */ +#define Rx5C348_BIT_Y2K 0x80 /* REG_MONTH */ +#define Rx5C348_BIT_24H 0x20 /* REG_CTL1 */ +#define Rx5C348_BIT_XSTP 0x10 /* REG_CTL2 */ + +/* commands */ +#define Rx5C348_CMD_W(addr) (((addr) << 4) | 0x08) /* single write */ +#define Rx5C348_CMD_R(addr) (((addr) << 4) | 0x0c) /* single read */ +#define Rx5C348_CMD_MW(addr) (((addr) << 4) | 0x00) /* burst write */ +#define Rx5C348_CMD_MR(addr) (((addr) << 4) | 0x04) /* burst read */ + +static struct spi_dev_desc srtc_dev_desc = { + .baud = 1000000, /* 1.0Mbps @ Vdd 2.0V */ + .tcss = 31, + .tcsh = 1, + .tcsr = 62, + /* 31us for Tcss (62us for Tcsr) is required for carry operation) */ + .byteorder = 1, /* MSB-First */ + .polarity = 0, /* High-Active */ + .phase = 1, /* Shift-Then-Sample */ + +}; +static int srtc_chipid; +static int srtc_24h; + +static inline int +spi_rtc_io(unsigned char *inbuf, unsigned char *outbuf, unsigned int count) +{ + unsigned char *inbufs[1], *outbufs[1]; + unsigned int incounts[2], outcounts[2]; + inbufs[0] = inbuf; + incounts[0] = count; + incounts[1] = 0; + outbufs[0] = outbuf; + outcounts[0] = count; + outcounts[1] = 0; + return txx9_spi_io(srtc_chipid, &srtc_dev_desc, + inbufs, incounts, outbufs, outcounts, 0); +} + +/* + * Conversion between binary and BCD. + */ +#ifndef BCD_TO_BIN +#define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10) +#endif + +#ifndef BIN_TO_BCD +#define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10) +#endif + +/* RTC-dependent code for time.c */ + +static int +rtc_rx5c348_set_time(unsigned long t) +{ + unsigned char inbuf[8]; + struct rtc_time tm; + u8 year, month, day, hour, minute, second, century; + + /* convert */ + to_tm(t, &tm); + + year = tm.tm_year % 100; + month = tm.tm_mon+1; /* tm_mon starts from 0 to 11 */ + day = tm.tm_mday; + hour = tm.tm_hour; + minute = tm.tm_min; + second = tm.tm_sec; + century = tm.tm_year / 100; + + inbuf[0] = Rx5C348_CMD_MW(Rx5C348_REG_SECOND); + BIN_TO_BCD(second); + inbuf[1] = second; + BIN_TO_BCD(minute); + inbuf[2] = minute; + + if (srtc_24h) { + BIN_TO_BCD(hour); + inbuf[3] = hour; + } else { + /* hour 0 is AM12, noon is PM12 */ + inbuf[3] = 0; + if (hour >= 12) + inbuf[3] = Rx5C348_BIT_PM; + hour = (hour + 11) % 12 + 1; + BIN_TO_BCD(hour); + inbuf[3] |= hour; + } + inbuf[4] = 0; /* ignore week */ + BIN_TO_BCD(day); + inbuf[5] = day; + BIN_TO_BCD(month); + inbuf[6] = month; + if (century >= 20) + inbuf[6] |= Rx5C348_BIT_Y2K; + BIN_TO_BCD(year); + inbuf[7] = year; + /* write in one transfer to avoid data inconsistency */ + return spi_rtc_io(inbuf, NULL, 8); +} + +static unsigned long +rtc_rx5c348_get_time(void) +{ + unsigned char inbuf[8], outbuf[8]; + unsigned int year, month, day, hour, minute, second; + + inbuf[0] = Rx5C348_CMD_MR(Rx5C348_REG_SECOND); + memset(inbuf + 1, 0, 7); + /* read in one transfer to avoid data inconsistency */ + if (spi_rtc_io(inbuf, outbuf, 8)) + return 0; + second = outbuf[1]; + BCD_TO_BIN(second); + minute = outbuf[2]; + BCD_TO_BIN(minute); + if (srtc_24h) { + hour = outbuf[3]; + BCD_TO_BIN(hour); + } else { + hour = outbuf[3] & ~Rx5C348_BIT_PM; + BCD_TO_BIN(hour); + hour %= 12; + if (outbuf[3] & Rx5C348_BIT_PM) + hour += 12; + } + day = outbuf[5]; + BCD_TO_BIN(day); + month = outbuf[6] & ~Rx5C348_BIT_Y2K; + BCD_TO_BIN(month); + year = outbuf[7]; + BCD_TO_BIN(year); + year += EPOCH; + + return mktime(year, month, day, hour, minute, second); +} + +void __init +rtc_rx5c348_init(int chipid) +{ + unsigned char inbuf[2], outbuf[2]; + srtc_chipid = chipid; + /* turn on RTC if it is not on */ + inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL2); + inbuf[1] = 0; + spi_rtc_io(inbuf, outbuf, 2); + if (outbuf[1] & Rx5C348_BIT_XSTP) { + inbuf[0] = Rx5C348_CMD_W(Rx5C348_REG_CTL2); + inbuf[1] = 0; + spi_rtc_io(inbuf, NULL, 2); + } + + inbuf[0] = Rx5C348_CMD_R(Rx5C348_REG_CTL1); + inbuf[1] = 0; + spi_rtc_io(inbuf, outbuf, 2); + if (outbuf[1] & Rx5C348_BIT_24H) + srtc_24h = 1; + + /* set the function pointers */ + rtc_get_time = rtc_rx5c348_get_time; + rtc_set_time = rtc_rx5c348_set_time; +} diff --git a/arch/mips/tx4938/common/setup.c b/arch/mips/tx4938/common/setup.c new file mode 100644 index 000000000000..fc992953bf95 --- /dev/null +++ b/arch/mips/tx4938/common/setup.c @@ -0,0 +1,91 @@ +/* + * linux/arch/mips/tx4938/common/setup.c + * + * common tx4938 setup routines + * + * 2003-2005 (c) MontaVista Software, Inc. 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. + * + * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel_stat.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/timex.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <linux/irq.h> +#include <asm/bitops.h> +#include <asm/bootinfo.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/mipsregs.h> +#include <asm/system.h> +#include <asm/time.h> +#include <asm/time.h> +#include <asm/tx4938/rbtx4938.h> + +extern void toshiba_rbtx4938_setup(void); +extern void rbtx4938_time_init(void); + +void __init tx4938_setup(void); +void __init tx4938_time_init(void); +void __init tx4938_timer_setup(struct irqaction *irq); +void dump_cp0(char *key); + +void (*__wbflush) (void); + +static void +tx4938_write_buffer_flush(void) +{ + mmiowb(); + + __asm__ __volatile__( + ".set push\n\t" + ".set noreorder\n\t" + "lw $0,%0\n\t" + "nop\n\t" + ".set pop" + : /* no output */ + : "m" (*(int *)KSEG1) + : "memory"); +} + +void __init +plat_setup(void) +{ + board_time_init = tx4938_time_init; + board_timer_setup = tx4938_timer_setup; + __wbflush = tx4938_write_buffer_flush; + toshiba_rbtx4938_setup(); +} + +void __init +tx4938_time_init(void) +{ + rbtx4938_time_init(); +} + +void __init +tx4938_timer_setup(struct irqaction *irq) +{ + u32 count; + u32 c1; + u32 c2; + + setup_irq(TX4938_IRQ_CPU_TIMER, irq); + + c1 = read_c0_count(); + count = c1 + (mips_hpt_frequency / HZ); + write_c0_compare(count); + c2 = read_c0_count(); +} |