582 lines
13 KiB
C
582 lines
13 KiB
C
/*
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* vrc4173.c, NEC VRC4173 base driver for NEC VR4122/VR4131.
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*
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* Copyright (C) 2001-2003 MontaVista Software Inc.
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* Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com>
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* Copyright (C) 2004 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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* Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/pci.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <asm/vr41xx/vr41xx.h>
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#include <asm/vr41xx/vrc4173.h>
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MODULE_DESCRIPTION("NEC VRC4173 base driver for NEC VR4122/4131");
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MODULE_AUTHOR("Yoichi Yuasa <yyuasa@mvista.com>");
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MODULE_LICENSE("GPL");
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#define VRC4173_CMUCLKMSK 0x040
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#define MSKPIU 0x0001
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#define MSKKIU 0x0002
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#define MSKAIU 0x0004
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#define MSKPS2CH1 0x0008
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#define MSKPS2CH2 0x0010
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#define MSKUSB 0x0020
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#define MSKCARD1 0x0040
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#define MSKCARD2 0x0080
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#define MSKAC97 0x0100
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#define MSK48MUSB 0x0400
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#define MSK48MPIN 0x0800
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#define MSK48MOSC 0x1000
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#define VRC4173_CMUSRST 0x042
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#define USBRST 0x0001
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#define CARD1RST 0x0002
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#define CARD2RST 0x0004
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#define AC97RST 0x0008
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#define VRC4173_SYSINT1REG 0x060
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#define VRC4173_MSYSINT1REG 0x06c
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#define VRC4173_MPIUINTREG 0x06e
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#define VRC4173_MAIUINTREG 0x070
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#define VRC4173_MKIUINTREG 0x072
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#define VRC4173_SELECTREG 0x09e
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#define SEL3 0x0008
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#define SEL2 0x0004
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#define SEL1 0x0002
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#define SEL0 0x0001
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static struct pci_device_id vrc4173_id_table[] __devinitdata = {
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{ .vendor = PCI_VENDOR_ID_NEC,
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.device = PCI_DEVICE_ID_NEC_VRC4173,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID, },
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{ .vendor = 0, },
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};
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unsigned long vrc4173_io_offset = 0;
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EXPORT_SYMBOL(vrc4173_io_offset);
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static int vrc4173_initialized;
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static uint16_t vrc4173_cmuclkmsk;
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static uint16_t vrc4173_selectreg;
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static DEFINE_SPINLOCK(vrc4173_cmu_lock);
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static DEFINE_SPINLOCK(vrc4173_giu_lock);
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static inline void set_cmusrst(uint16_t val)
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{
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uint16_t cmusrst;
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cmusrst = vrc4173_inw(VRC4173_CMUSRST);
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cmusrst |= val;
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vrc4173_outw(cmusrst, VRC4173_CMUSRST);
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}
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static inline void clear_cmusrst(uint16_t val)
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{
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uint16_t cmusrst;
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cmusrst = vrc4173_inw(VRC4173_CMUSRST);
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cmusrst &= ~val;
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vrc4173_outw(cmusrst, VRC4173_CMUSRST);
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}
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void vrc4173_supply_clock(vrc4173_clock_t clock)
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{
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if (vrc4173_initialized) {
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spin_lock_irq(&vrc4173_cmu_lock);
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switch (clock) {
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case VRC4173_PIU_CLOCK:
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vrc4173_cmuclkmsk |= MSKPIU;
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break;
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case VRC4173_KIU_CLOCK:
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vrc4173_cmuclkmsk |= MSKKIU;
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break;
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case VRC4173_AIU_CLOCK:
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vrc4173_cmuclkmsk |= MSKAIU;
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break;
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case VRC4173_PS2_CH1_CLOCK:
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vrc4173_cmuclkmsk |= MSKPS2CH1;
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break;
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case VRC4173_PS2_CH2_CLOCK:
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vrc4173_cmuclkmsk |= MSKPS2CH2;
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break;
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case VRC4173_USBU_PCI_CLOCK:
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set_cmusrst(USBRST);
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vrc4173_cmuclkmsk |= MSKUSB;
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break;
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case VRC4173_CARDU1_PCI_CLOCK:
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set_cmusrst(CARD1RST);
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vrc4173_cmuclkmsk |= MSKCARD1;
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break;
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case VRC4173_CARDU2_PCI_CLOCK:
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set_cmusrst(CARD2RST);
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vrc4173_cmuclkmsk |= MSKCARD2;
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break;
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case VRC4173_AC97U_PCI_CLOCK:
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set_cmusrst(AC97RST);
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vrc4173_cmuclkmsk |= MSKAC97;
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break;
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case VRC4173_USBU_48MHz_CLOCK:
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set_cmusrst(USBRST);
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vrc4173_cmuclkmsk |= MSK48MUSB;
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break;
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case VRC4173_EXT_48MHz_CLOCK:
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if (vrc4173_cmuclkmsk & MSK48MOSC)
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vrc4173_cmuclkmsk |= MSK48MPIN;
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else
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printk(KERN_WARNING
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"vrc4173_supply_clock: "
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"Please supply VRC4173_48MHz_CLOCK first "
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"rather than VRC4173_EXT_48MHz_CLOCK.\n");
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break;
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case VRC4173_48MHz_CLOCK:
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vrc4173_cmuclkmsk |= MSK48MOSC;
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break;
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default:
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printk(KERN_WARNING
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"vrc4173_supply_clock: Invalid CLOCK value %u\n", clock);
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break;
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}
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vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK);
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switch (clock) {
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case VRC4173_USBU_PCI_CLOCK:
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case VRC4173_USBU_48MHz_CLOCK:
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clear_cmusrst(USBRST);
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break;
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case VRC4173_CARDU1_PCI_CLOCK:
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clear_cmusrst(CARD1RST);
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break;
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case VRC4173_CARDU2_PCI_CLOCK:
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clear_cmusrst(CARD2RST);
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break;
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case VRC4173_AC97U_PCI_CLOCK:
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clear_cmusrst(AC97RST);
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break;
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default:
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break;
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}
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spin_unlock_irq(&vrc4173_cmu_lock);
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}
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}
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EXPORT_SYMBOL(vrc4173_supply_clock);
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void vrc4173_mask_clock(vrc4173_clock_t clock)
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{
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if (vrc4173_initialized) {
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spin_lock_irq(&vrc4173_cmu_lock);
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switch (clock) {
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case VRC4173_PIU_CLOCK:
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vrc4173_cmuclkmsk &= ~MSKPIU;
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break;
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case VRC4173_KIU_CLOCK:
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vrc4173_cmuclkmsk &= ~MSKKIU;
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break;
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case VRC4173_AIU_CLOCK:
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vrc4173_cmuclkmsk &= ~MSKAIU;
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break;
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case VRC4173_PS2_CH1_CLOCK:
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vrc4173_cmuclkmsk &= ~MSKPS2CH1;
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break;
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case VRC4173_PS2_CH2_CLOCK:
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vrc4173_cmuclkmsk &= ~MSKPS2CH2;
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break;
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case VRC4173_USBU_PCI_CLOCK:
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set_cmusrst(USBRST);
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vrc4173_cmuclkmsk &= ~MSKUSB;
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break;
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case VRC4173_CARDU1_PCI_CLOCK:
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set_cmusrst(CARD1RST);
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vrc4173_cmuclkmsk &= ~MSKCARD1;
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break;
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case VRC4173_CARDU2_PCI_CLOCK:
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set_cmusrst(CARD2RST);
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vrc4173_cmuclkmsk &= ~MSKCARD2;
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break;
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case VRC4173_AC97U_PCI_CLOCK:
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set_cmusrst(AC97RST);
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vrc4173_cmuclkmsk &= ~MSKAC97;
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break;
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case VRC4173_USBU_48MHz_CLOCK:
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set_cmusrst(USBRST);
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vrc4173_cmuclkmsk &= ~MSK48MUSB;
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break;
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case VRC4173_EXT_48MHz_CLOCK:
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vrc4173_cmuclkmsk &= ~MSK48MPIN;
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break;
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case VRC4173_48MHz_CLOCK:
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vrc4173_cmuclkmsk &= ~MSK48MOSC;
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break;
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default:
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printk(KERN_WARNING "vrc4173_mask_clock: Invalid CLOCK value %u\n", clock);
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break;
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}
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vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK);
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switch (clock) {
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case VRC4173_USBU_PCI_CLOCK:
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case VRC4173_USBU_48MHz_CLOCK:
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clear_cmusrst(USBRST);
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break;
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case VRC4173_CARDU1_PCI_CLOCK:
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clear_cmusrst(CARD1RST);
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break;
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case VRC4173_CARDU2_PCI_CLOCK:
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clear_cmusrst(CARD2RST);
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break;
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case VRC4173_AC97U_PCI_CLOCK:
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clear_cmusrst(AC97RST);
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break;
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default:
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break;
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}
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spin_unlock_irq(&vrc4173_cmu_lock);
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}
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}
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EXPORT_SYMBOL(vrc4173_mask_clock);
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static inline void vrc4173_cmu_init(void)
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{
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vrc4173_cmuclkmsk = vrc4173_inw(VRC4173_CMUCLKMSK);
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spin_lock_init(&vrc4173_cmu_lock);
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}
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void vrc4173_select_function(vrc4173_function_t function)
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{
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if (vrc4173_initialized) {
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spin_lock_irq(&vrc4173_giu_lock);
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switch(function) {
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case PS2_CHANNEL1:
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vrc4173_selectreg |= SEL2;
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break;
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case PS2_CHANNEL2:
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vrc4173_selectreg |= SEL1;
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break;
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case TOUCHPANEL:
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vrc4173_selectreg &= SEL2 | SEL1 | SEL0;
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break;
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case KEYBOARD_8SCANLINES:
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vrc4173_selectreg &= SEL3 | SEL2 | SEL1;
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break;
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case KEYBOARD_10SCANLINES:
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vrc4173_selectreg &= SEL3 | SEL2;
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break;
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case KEYBOARD_12SCANLINES:
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vrc4173_selectreg &= SEL3;
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break;
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case GPIO_0_15PINS:
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vrc4173_selectreg |= SEL0;
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break;
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case GPIO_16_20PINS:
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vrc4173_selectreg |= SEL3;
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break;
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}
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vrc4173_outw(vrc4173_selectreg, VRC4173_SELECTREG);
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spin_unlock_irq(&vrc4173_giu_lock);
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}
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}
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EXPORT_SYMBOL(vrc4173_select_function);
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static inline void vrc4173_giu_init(void)
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{
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vrc4173_selectreg = vrc4173_inw(VRC4173_SELECTREG);
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spin_lock_init(&vrc4173_giu_lock);
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}
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void vrc4173_enable_piuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MPIUINTREG);
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val |= mask;
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vrc4173_outw(val, VRC4173_MPIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_enable_piuint);
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void vrc4173_disable_piuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MPIUINTREG);
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val &= ~mask;
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vrc4173_outw(val, VRC4173_MPIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_disable_piuint);
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void vrc4173_enable_aiuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MAIUINTREG);
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val |= mask;
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vrc4173_outw(val, VRC4173_MAIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_enable_aiuint);
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void vrc4173_disable_aiuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MAIUINTREG);
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val &= ~mask;
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vrc4173_outw(val, VRC4173_MAIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_disable_aiuint);
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void vrc4173_enable_kiuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MKIUINTREG);
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val |= mask;
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vrc4173_outw(val, VRC4173_MKIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_enable_kiuint);
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void vrc4173_disable_kiuint(uint16_t mask)
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{
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irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ;
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unsigned long flags;
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uint16_t val;
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spin_lock_irqsave(&desc->lock, flags);
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val = vrc4173_inw(VRC4173_MKIUINTREG);
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val &= ~mask;
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vrc4173_outw(val, VRC4173_MKIUINTREG);
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spin_unlock_irqrestore(&desc->lock, flags);
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}
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EXPORT_SYMBOL(vrc4173_disable_kiuint);
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static void enable_vrc4173_irq(unsigned int irq)
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{
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uint16_t val;
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val = vrc4173_inw(VRC4173_MSYSINT1REG);
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val |= (uint16_t)1 << (irq - VRC4173_IRQ_BASE);
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vrc4173_outw(val, VRC4173_MSYSINT1REG);
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}
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static void disable_vrc4173_irq(unsigned int irq)
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{
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uint16_t val;
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val = vrc4173_inw(VRC4173_MSYSINT1REG);
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val &= ~((uint16_t)1 << (irq - VRC4173_IRQ_BASE));
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vrc4173_outw(val, VRC4173_MSYSINT1REG);
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}
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static unsigned int startup_vrc4173_irq(unsigned int irq)
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{
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enable_vrc4173_irq(irq);
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return 0; /* never anything pending */
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}
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#define shutdown_vrc4173_irq disable_vrc4173_irq
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#define ack_vrc4173_irq disable_vrc4173_irq
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static void end_vrc4173_irq(unsigned int irq)
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{
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if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
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enable_vrc4173_irq(irq);
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}
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static struct hw_interrupt_type vrc4173_irq_type = {
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.typename = "VRC4173",
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.startup = startup_vrc4173_irq,
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.shutdown = shutdown_vrc4173_irq,
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.enable = enable_vrc4173_irq,
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.disable = disable_vrc4173_irq,
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.ack = ack_vrc4173_irq,
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.end = end_vrc4173_irq,
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};
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static int vrc4173_get_irq_number(int irq)
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{
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uint16_t status, mask;
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int i;
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status = vrc4173_inw(VRC4173_SYSINT1REG);
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mask = vrc4173_inw(VRC4173_MSYSINT1REG);
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status &= mask;
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if (status) {
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for (i = 0; i < 16; i++)
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if (status & (0x0001 << i))
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return VRC4173_IRQ(i);
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}
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return -EINVAL;
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}
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static inline int vrc4173_icu_init(int cascade_irq)
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{
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int i;
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if (cascade_irq < GIU_IRQ(0) || cascade_irq > GIU_IRQ(15))
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return -EINVAL;
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vrc4173_outw(0, VRC4173_MSYSINT1REG);
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vr41xx_set_irq_trigger(GIU_IRQ_TO_PIN(cascade_irq), TRIGGER_LEVEL, SIGNAL_THROUGH);
|
|
vr41xx_set_irq_level(GIU_IRQ_TO_PIN(cascade_irq), LEVEL_LOW);
|
|
|
|
for (i = VRC4173_IRQ_BASE; i <= VRC4173_IRQ_LAST; i++)
|
|
irq_desc[i].handler = &vrc4173_irq_type;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit vrc4173_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
unsigned long start, flags;
|
|
int err;
|
|
|
|
err = pci_enable_device(dev);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "vrc4173: Failed to enable PCI device, aborting\n");
|
|
return err;
|
|
}
|
|
|
|
pci_set_master(dev);
|
|
|
|
start = pci_resource_start(dev, 0);
|
|
if (start == 0) {
|
|
printk(KERN_ERR "vrc4173:No such PCI I/O resource, aborting\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
flags = pci_resource_flags(dev, 0);
|
|
if ((flags & IORESOURCE_IO) == 0) {
|
|
printk(KERN_ERR "vrc4173: No such PCI I/O resource, aborting\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
err = pci_request_regions(dev, "NEC VRC4173");
|
|
if (err < 0) {
|
|
printk(KERN_ERR "vrc4173: PCI resources are busy, aborting\n");
|
|
return err;
|
|
}
|
|
|
|
set_vrc4173_io_offset(start);
|
|
|
|
vrc4173_cmu_init();
|
|
vrc4173_giu_init();
|
|
|
|
err = vrc4173_icu_init(dev->irq);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "vrc4173: Invalid IRQ %d, aborting\n", dev->irq);
|
|
return err;
|
|
}
|
|
|
|
err = vr41xx_cascade_irq(dev->irq, vrc4173_get_irq_number);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "vrc4173: IRQ resource %d is busy, aborting\n", dev->irq);
|
|
return err;
|
|
}
|
|
|
|
printk(KERN_INFO
|
|
"NEC VRC4173 at 0x%#08lx, IRQ is cascaded to %d\n", start, dev->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vrc4173_remove(struct pci_dev *dev)
|
|
{
|
|
free_irq(dev->irq, NULL);
|
|
|
|
pci_release_regions(dev);
|
|
}
|
|
|
|
static struct pci_driver vrc4173_driver = {
|
|
.name = "NEC VRC4173",
|
|
.probe = vrc4173_probe,
|
|
.remove = vrc4173_remove,
|
|
.id_table = vrc4173_id_table,
|
|
};
|
|
|
|
static int __devinit vrc4173_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = pci_register_driver(&vrc4173_driver);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
vrc4173_initialized = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __devexit vrc4173_exit(void)
|
|
{
|
|
vrc4173_initialized = 0;
|
|
|
|
pci_unregister_driver(&vrc4173_driver);
|
|
}
|
|
|
|
module_init(vrc4173_init);
|
|
module_exit(vrc4173_exit);
|