Menu
▾
▴
[linuxdc-cvs] CVS: linux/arch/sh/kernel io_powervr2dc.c,NONE,1.1 mach_dreamcast.c,NONE,1.1 setup_powervr2dc.c,NONE,1.1 Makefile,1.3,1.4
|
From: M. R. B. <mr...@us...> - 2001-02-21 15:21:11
|
Update of /cvsroot/linuxdc/linux/arch/sh/kernel
In directory usw-pr-cvs1:/tmp/cvs-serv1015/kernel
Modified Files:
Makefile
Added Files:
io_powervr2dc.c mach_dreamcast.c setup_powervr2dc.c
Log Message:
Added initial Dreamcast PowerVR2DC and hardware support
--- NEW FILE ---
/*
* linux/arch/sh/kernel/io_powervr2dc.c
*
* I/O routines for the Dreamcast PowerVR2DC ASIC.
*
* Copyright (c) 2001 M. R. Brown <mr...@0x...>
*
*/
/*
* Until I get some info on bITmASTER's ISA/IDE interface to the DC's
* expansion port, this file will remain unimplemented. Until then,
* you won't get much use out of ISA code :)
*/
/* BTW, PCI is coming real soon :) */
/* I hope I don't get hanged for this ;) */
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/powervr2dc.h>
/*
unsigned char powervr2dc_inb(unsigned long port)
{
BUG();
return 0;
}
unsigned short powervr2dc_inw(unsigned long port)
{
BUG();
return 0;
}
unsigned int powervr2dc_inl(unsigned long port)
{
BUG();
return 0;
}
void powervr2dc_outb(unsigned char data, unsigned long port)
{
BUG();
}
void powervr2dc_outw(unsigned short data, unsigned long port)
{
BUG();
}
void powervr2dc_outl(unsigned int data, unsigned long port)
{
BUG();
}
*/
--- NEW FILE ---
/*
* linux/arch/sh/kernel/mach_dreamcast.c
*
* Copyright (c) 2001 M. R. Brown <mr...@0x...>
*
* Machine vector for the Sega Dreamcast.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <asm/machvec.h>
#include <asm/rtc.h>
#include <asm/machvec_init.h>
#include <asm/io.h>
#include <asm/irq.h>
/*
* The Machine Vector
*/
struct sh_machine_vector mv_dreamcast __initmv = {
mv_name: "Dreamcast",
mv_nr_irqs: 160, /* PVR2DC_IRQ_BASE + PVR2DC_IRQ_NUM */
mv_inb: generic_inb,
mv_inw: generic_inw,
mv_inl: generic_inl,
mv_outb: generic_outb,
mv_outw: generic_outw,
mv_outl: generic_outl,
mv_inb_p: generic_inb_p,
mv_inw_p: generic_inw_p,
mv_inl_p: generic_inl_p,
mv_outb_p: generic_outb_p,
mv_outw_p: generic_outw_p,
mv_outl_p: generic_outl_p,
mv_insb: generic_insb,
mv_insw: generic_insw,
mv_insl: generic_insl,
mv_outsb: generic_outsb,
mv_outsw: generic_outsw,
mv_outsl: generic_outsl,
mv_readb: generic_readb,
mv_readw: generic_readw,
mv_readl: generic_readl,
mv_writeb: generic_writeb,
mv_writew: generic_writew,
mv_writel: generic_writel,
mv_irq_demux: powervr2dc_irq_demux,
/* These are in setup_powervr2dc.c */
mv_rtc_gettimeofday: dc_aica_rtc_gettimeofday,
mv_rtc_settimeofday: dc_aica_rtc_settimeofday,
mv_hw_dreamcast: 1,
};
ALIAS_MV(dreamcast)
--- NEW FILE ---
/*
* linux/arch/sh/kernel/setup_powervr2dc.c
*
* Interrupt handling and misc. routines for the Dreamcast
* PowerVR2DC ASIC.
*
* Copyright (c) 2001 M. R. Brown <mr...@0x...>
*
* This code is based on both setup_hd64465.c and setup_ec3104.c, by
* Greg Banks and Philipp Rumpf, respectively.
*/
/*
* This a preliminary PowerVR2DC interrupt handling mechanism. NOTE: This code
* needs *MAJOR* testing. I need to make sure the "bitfield" semantics are correct,
* and that powervr2dc_irq_demux() does what it's intended to.
*/
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/time.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/powervr2dc.h>
#include <asm/aica.h>
/*
* The AICA RTC routines are in here because there isn't really a proper
* place for them, based on what they're needed for (they serve two purposes,
* RTC manipulation and timer calibration). There isn't even enough for a
* full-fledged "misc" driver, and there doesn't need to be.
*/
/*
* The AICA RTC epoch is January 1st, 1950, so we need to add/subtract this
* value to convert from/to the Unix epoch.
*/
#define TWENTY_YEARS 631152000
void dc_aica_rtc_gettimeofday(struct timeval *tv)
{
u32 secs;
u32 val;
do {
secs = ((ctrl_inl(AICA_REG_RTCH) & 0xffff) << 16) |
(ctrl_inl(AICA_REG_RTCL) & 0xffff);
val = ((ctrl_inl(AICA_REG_RTCH) & 0xffff) << 16) |
(ctrl_inl(AICA_REG_RTCL) & 0xffff);
} while (secs != val);
tv->tv_sec = secs - TWENTY_YEARS;
tv->tv_usec = 0;
}
int dc_aica_rtc_settimeofday(const struct timeval *tv)
{
u32 val;
u32 secs = tv->tv_sec + TWENTY_YEARS;
do {
ctrl_outl((secs >> 16) & 0xffff, AICA_REG_RTCH);
ctrl_outl(secs & 0xffff, AICA_REG_RTCL);
val = ((ctrl_inl(AICA_REG_RTCH) & 0xffff) << 16) |
(ctrl_inl(AICA_REG_RTCL) & 0xffff);
} while (secs != val);
return 0;
}
/* PowerVR2DC Interrupt-handling */
/* Hmm, I treat the IPR/IMR as a giant bitfield (96 bits) as each interrupt is
* masked/acknowledged by a single bit position. */
static inline void disable_powervr2dc_irq(unsigned int irq)
{
clear_bit(irq, (volatile unsigned long *)PVR2DC_REG_IMRA);
}
static inline void enable_powervr2dc_irq(unsigned int irq)
{
set_bit(irq, (volatile unsigned long *)PVR2DC_REG_IMRA);
}
/*
* To acknowledge an interrupt, we write back the mask onto the IPR*
* registers. You can actually acknowledge as many or as few interrupts
* as you like, but we only handle one request here.
*/
static void ack_powervr2dc_irq(unsigned int irq)
{
set_bit(irq, (volatile unsigned long *)PVR2DC_REG_IPRA);
}
/* XXX: These next three were done pretty blindly */
static void end_powervr2dc_irq(unsigned int irq)
{
enable_powervr2dc_irq(irq);
}
static unsigned int startup_powervr2dc_irq(unsigned int irq)
{
enable_powervr2dc_irq(irq);
return 0;
}
static void shutdown_powervr2dc_irq(unsigned int irq)
{
disable_powervr2dc_irq(irq);
}
static struct hw_interrupt_type powervr2dc_int = {
typename: "PowerVR2DC",
startup: startup_powervr2dc_irq,
shutdown: shutdown_powervr2dc_irq,
enable: enable_powervr2dc_irq,
disable: disable_powervr2dc_irq,
ack: ack_powervr2dc_irq,
end: end_powervr2dc_irq,
};
/* Just to satisfy my own curiosities :) */
static void powervr2dc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
printk(KERN_INFO
"PowerVR2DC: spurious interrupt, IPRA: %08x IPRB: %08x IPRC: %08x"
"IMRA: %08x IMRB: %08x IMRC: %08x\n",
ctrl_inl(PVR2DC_REG_IPRA), ctrl_inl(PVR2DC_REG_IPRB),
ctrl_inl(PVR2DC_REG_IPRC), ctrl_inl(PVR2DC_REG_IMRA),
ctrl_inl(PVR2DC_REG_IMRB), ctrl_inl(PVR2DC_REG_IMRC));
}
static struct irqaction irq9 = { powervr2dc_interrupt, SA_INTERRUPT, 0,
"PowerVR2DC", NULL, NULL };
/*
* That handy bitfield again. To demux IRQ9, just find the first non-zero bit
* to use as the source. There's only one problem: if you get multiple interrupt
* sources per IRQ, how do you demux those?
*/
/* XXX: Need to make sure all int. sources are being handled per IRQ! Is this
* handled in irq.c:handle_IRQ_event()/do_IRQ() ? */
int powervr2dc_irq_demux(int irq)
{
if (irq == PVR2DC_IRQ) {
u32 i = 0, bit;
u32 ipr, req;
/* Brute force scan each int. pending register.
* This also needs fixing. */
for (ipr = PVR2DC_REG_IPRA ; ipr <= PVR2DC_REG_IPRC ; ipr += 4) {
req = ctrl_inl(ipr);
for (bit = 1 ; i < PVR2DC_IRQ_NUM ; bit <<= 1, i++)
if (req & bit)
goto found;
}
found:
if (i < PVR2DC_IRQ_NUM)
irq = PVR2DC_IRQ_BASE + i;
}
return irq;
}
int __init setup_powervr2dc(void)
{
int i;
int ver_major, ver_minor;
if (!MACH_DREAMCAST) {
printk("!MACH_DREAMCAST\n");
return 0;
}
for (i = PVR2DC_IRQ_BASE; i < PVR2DC_IRQ_BASE + PVR2DC_IRQ_NUM; i++)
irq_desc[i].handler = &powervr2dc_int;
ver_major = (ctrl_inl(PVR2DC_REG_VERSION) >> 4) & 0x0f;
ver_minor = ctrl_inl(PVR2DC_REG_VERSION) & 0x0f;
/* XXX: What other initialization needs to be done (besides interrupts)? */
printk("Initializing PowerVR2DC v%d.%d at 0x%08x (interrupts on IRQ %d, %d total)\n",
ver_major, ver_minor, PVR2DC_BASE, PVR2DC_IRQ, PVR2DC_IRQ_NUM);
setup_irq(PVR2DC_IRQ, &irq9);
/* Mask all interrupts. */
ctrl_outl(0, PVR2DC_REG_IMRA);
ctrl_outl(0, PVR2DC_REG_IMRB);
ctrl_outl(0, PVR2DC_REG_IMRC);
/* Acknowledge any previous interrupts */
ctrl_inl(PVR2DC_REG_IPRA);
ctrl_outl(0xffffffff, PVR2DC_REG_IPRA);
ctrl_inl(PVR2DC_REG_IPRB);
ctrl_outl(0xffffffff, PVR2DC_REG_IPRB);
ctrl_inl(PVR2DC_REG_IPRC);
ctrl_outl(0xffffffff, PVR2DC_REG_IPRC);
return 0;
}
module_init(setup_powervr2dc);
Index: Makefile
===================================================================
RCS file: /cvsroot/linuxdc/linux/arch/sh/kernel/Makefile,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -r1.3 -r1.4
*** Makefile 2001/02/09 16:27:14 1.3
--- Makefile 2001/02/21 15:22:11 1.4
***************
*** 53,57 ****
obj-$(CONFIG_SH_DMIDA) += mach_dmida.o
obj-$(CONFIG_SH_EC3104) += setup_ec3104.o io_ec3104.o mach_ec3104.o
! obj-$(CONFIG_SH_DREAMCAST) += mach_dc.o setup_dc.o io_dc.o
ifeq ($(CONFIG_SH_GENERIC),y)
--- 53,57 ----
obj-$(CONFIG_SH_DMIDA) += mach_dmida.o
obj-$(CONFIG_SH_EC3104) += setup_ec3104.o io_ec3104.o mach_ec3104.o
! obj-$(CONFIG_SH_DREAMCAST) += mach_dreamcast.o setup_powervr2dc.o io_powervr2dc.o
ifeq ($(CONFIG_SH_GENERIC),y)
|
