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/* -------------------------------------------------------------------- */
/* setup_voyagergx.c: */
/* -------------------------------------------------------------------- */
/* 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 program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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.
Copyright 2003 (c) Lineo uSolutions,Inc.
*/
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/voyagergx.h>
#include <asm/rts7751r2d.h>
enum {
UNUSED = 0,
/* voyager specific interrupt sources */
UP, G54, G53, G52, G51, G50, G49, G48,
I2C, PW, DMA, PCI, I2S, AC, US,
U1, U0, CV, MC, S1, S0,
UH, TWOD, ZD, PV, CI,
};
static struct intc_vect vectors[] __initdata = {
INTC_IRQ(UP, IRQ_SM501_UP), INTC_IRQ(G54, IRQ_SM501_G54),
INTC_IRQ(G53, IRQ_SM501_G53), INTC_IRQ(G52, IRQ_SM501_G52),
INTC_IRQ(G51, IRQ_SM501_G51), INTC_IRQ(G50, IRQ_SM501_G50),
INTC_IRQ(G49, IRQ_SM501_G49), INTC_IRQ(G48, IRQ_SM501_G48),
INTC_IRQ(I2C, IRQ_SM501_I2C), INTC_IRQ(PW, IRQ_SM501_PW),
INTC_IRQ(DMA, IRQ_SM501_DMA), INTC_IRQ(PCI, IRQ_SM501_PCI),
INTC_IRQ(I2S, IRQ_SM501_I2S), INTC_IRQ(AC, IRQ_SM501_AC),
INTC_IRQ(US, IRQ_SM501_US), INTC_IRQ(U1, IRQ_SM501_U1),
INTC_IRQ(U0, IRQ_SM501_U0), INTC_IRQ(CV, IRQ_SM501_CV),
INTC_IRQ(MC, IRQ_SM501_MC), INTC_IRQ(S1, IRQ_SM501_S1),
INTC_IRQ(S0, IRQ_SM501_S0), INTC_IRQ(UH, IRQ_SM501_UH),
INTC_IRQ(TWOD, IRQ_SM501_2D), INTC_IRQ(ZD, IRQ_SM501_ZD),
INTC_IRQ(PV, IRQ_SM501_PV), INTC_IRQ(CI, IRQ_SM501_CI),
};
static struct intc_mask_reg mask_registers[] __initdata = {
{ VOYAGER_INT_MASK, 0, 32, /* "Interrupt Mask", MMIO_base + 0x30 */
{ UP, G54, G53, G52, G51, G50, G49, G48,
I2C, PW, 0, DMA, PCI, I2S, AC, US,
0, 0, U1, U0, CV, MC, S1, S0,
0, UH, 0, 0, TWOD, ZD, PV, CI } },
};
static DECLARE_INTC_DESC(intc_desc, "voyagergx", vectors,
NULL, mask_registers, NULL, NULL);
static unsigned int voyagergx_stat2irq[32] = {
IRQ_SM501_CI, IRQ_SM501_PV, IRQ_SM501_ZD, IRQ_SM501_2D,
0, 0, IRQ_SM501_UH, 0,
IRQ_SM501_S0, IRQ_SM501_S1, IRQ_SM501_MC, IRQ_SM501_CV,
IRQ_SM501_U0, IRQ_SM501_U1, 0, 0,
IRQ_SM501_US, IRQ_SM501_AC, IRQ_SM501_I2S, IRQ_SM501_PCI,
IRQ_SM501_DMA, 0, IRQ_SM501_PW, IRQ_SM501_I2C,
IRQ_SM501_G48, IRQ_SM501_G49, IRQ_SM501_G50, IRQ_SM501_G51,
IRQ_SM501_G52, IRQ_SM501_G53, IRQ_SM501_G54, IRQ_SM501_UP
};
static void voyagergx_irq_demux(unsigned int irq, struct irq_desc *desc)
{
unsigned long intv = ctrl_inl(INT_STATUS);
struct irq_desc *ext_desc;
unsigned int ext_irq;
unsigned int k = 0;
while (intv) {
ext_irq = voyagergx_stat2irq[k];
if (ext_irq && (intv & 1)) {
ext_desc = irq_desc + ext_irq;
handle_level_irq(ext_irq, ext_desc);
}
intv >>= 1;
k++;
}
}
void __init setup_voyagergx_irq(void)
{
printk(KERN_INFO "VoyagerGX on irq %d (mapped into %d to %d)\n",
IRQ_VOYAGER,
VOYAGER_IRQ_BASE,
VOYAGER_IRQ_BASE + VOYAGER_IRQ_NUM - 1);
register_intc_controller(&intc_desc);
set_irq_chained_handler(IRQ_VOYAGER, voyagergx_irq_demux);
}
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