From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/mips/vr41xx/common/vrc4173.c | 581 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 581 insertions(+) create mode 100644 arch/mips/vr41xx/common/vrc4173.c (limited to 'arch/mips/vr41xx/common/vrc4173.c') diff --git a/arch/mips/vr41xx/common/vrc4173.c b/arch/mips/vr41xx/common/vrc4173.c new file mode 100644 index 00000000000..5475dd72e26 --- /dev/null +++ b/arch/mips/vr41xx/common/vrc4173.c @@ -0,0 +1,581 @@ +/* + * vrc4173.c, NEC VRC4173 base driver for NEC VR4122/VR4131. + * + * Copyright (C) 2001-2003 MontaVista Software Inc. + * Author: Yoichi Yuasa + * Copyright (C) 2004 Yoichi Yuasa + * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org) + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +MODULE_DESCRIPTION("NEC VRC4173 base driver for NEC VR4122/4131"); +MODULE_AUTHOR("Yoichi Yuasa "); +MODULE_LICENSE("GPL"); + +#define VRC4173_CMUCLKMSK 0x040 + #define MSKPIU 0x0001 + #define MSKKIU 0x0002 + #define MSKAIU 0x0004 + #define MSKPS2CH1 0x0008 + #define MSKPS2CH2 0x0010 + #define MSKUSB 0x0020 + #define MSKCARD1 0x0040 + #define MSKCARD2 0x0080 + #define MSKAC97 0x0100 + #define MSK48MUSB 0x0400 + #define MSK48MPIN 0x0800 + #define MSK48MOSC 0x1000 +#define VRC4173_CMUSRST 0x042 + #define USBRST 0x0001 + #define CARD1RST 0x0002 + #define CARD2RST 0x0004 + #define AC97RST 0x0008 + +#define VRC4173_SYSINT1REG 0x060 +#define VRC4173_MSYSINT1REG 0x06c +#define VRC4173_MPIUINTREG 0x06e +#define VRC4173_MAIUINTREG 0x070 +#define VRC4173_MKIUINTREG 0x072 + +#define VRC4173_SELECTREG 0x09e + #define SEL3 0x0008 + #define SEL2 0x0004 + #define SEL1 0x0002 + #define SEL0 0x0001 + +static struct pci_device_id vrc4173_id_table[] __devinitdata = { + { .vendor = PCI_VENDOR_ID_NEC, + .device = PCI_DEVICE_ID_NEC_VRC4173, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, }, + { .vendor = 0, }, +}; + +unsigned long vrc4173_io_offset = 0; + +EXPORT_SYMBOL(vrc4173_io_offset); + +static int vrc4173_initialized; +static uint16_t vrc4173_cmuclkmsk; +static uint16_t vrc4173_selectreg; +static spinlock_t vrc4173_cmu_lock; +static spinlock_t vrc4173_giu_lock; + +static inline void set_cmusrst(uint16_t val) +{ + uint16_t cmusrst; + + cmusrst = vrc4173_inw(VRC4173_CMUSRST); + cmusrst |= val; + vrc4173_outw(cmusrst, VRC4173_CMUSRST); +} + +static inline void clear_cmusrst(uint16_t val) +{ + uint16_t cmusrst; + + cmusrst = vrc4173_inw(VRC4173_CMUSRST); + cmusrst &= ~val; + vrc4173_outw(cmusrst, VRC4173_CMUSRST); +} + +void vrc4173_supply_clock(vrc4173_clock_t clock) +{ + if (vrc4173_initialized) { + spin_lock_irq(&vrc4173_cmu_lock); + + switch (clock) { + case VRC4173_PIU_CLOCK: + vrc4173_cmuclkmsk |= MSKPIU; + break; + case VRC4173_KIU_CLOCK: + vrc4173_cmuclkmsk |= MSKKIU; + break; + case VRC4173_AIU_CLOCK: + vrc4173_cmuclkmsk |= MSKAIU; + break; + case VRC4173_PS2_CH1_CLOCK: + vrc4173_cmuclkmsk |= MSKPS2CH1; + break; + case VRC4173_PS2_CH2_CLOCK: + vrc4173_cmuclkmsk |= MSKPS2CH2; + break; + case VRC4173_USBU_PCI_CLOCK: + set_cmusrst(USBRST); + vrc4173_cmuclkmsk |= MSKUSB; + break; + case VRC4173_CARDU1_PCI_CLOCK: + set_cmusrst(CARD1RST); + vrc4173_cmuclkmsk |= MSKCARD1; + break; + case VRC4173_CARDU2_PCI_CLOCK: + set_cmusrst(CARD2RST); + vrc4173_cmuclkmsk |= MSKCARD2; + break; + case VRC4173_AC97U_PCI_CLOCK: + set_cmusrst(AC97RST); + vrc4173_cmuclkmsk |= MSKAC97; + break; + case VRC4173_USBU_48MHz_CLOCK: + set_cmusrst(USBRST); + vrc4173_cmuclkmsk |= MSK48MUSB; + break; + case VRC4173_EXT_48MHz_CLOCK: + if (vrc4173_cmuclkmsk & MSK48MOSC) + vrc4173_cmuclkmsk |= MSK48MPIN; + else + printk(KERN_WARNING + "vrc4173_supply_clock: " + "Please supply VRC4173_48MHz_CLOCK first " + "rather than VRC4173_EXT_48MHz_CLOCK.\n"); + break; + case VRC4173_48MHz_CLOCK: + vrc4173_cmuclkmsk |= MSK48MOSC; + break; + default: + printk(KERN_WARNING + "vrc4173_supply_clock: Invalid CLOCK value %u\n", clock); + break; + } + + vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK); + + switch (clock) { + case VRC4173_USBU_PCI_CLOCK: + case VRC4173_USBU_48MHz_CLOCK: + clear_cmusrst(USBRST); + break; + case VRC4173_CARDU1_PCI_CLOCK: + clear_cmusrst(CARD1RST); + break; + case VRC4173_CARDU2_PCI_CLOCK: + clear_cmusrst(CARD2RST); + break; + case VRC4173_AC97U_PCI_CLOCK: + clear_cmusrst(AC97RST); + break; + default: + break; + } + + spin_unlock_irq(&vrc4173_cmu_lock); + } +} + +EXPORT_SYMBOL(vrc4173_supply_clock); + +void vrc4173_mask_clock(vrc4173_clock_t clock) +{ + if (vrc4173_initialized) { + spin_lock_irq(&vrc4173_cmu_lock); + + switch (clock) { + case VRC4173_PIU_CLOCK: + vrc4173_cmuclkmsk &= ~MSKPIU; + break; + case VRC4173_KIU_CLOCK: + vrc4173_cmuclkmsk &= ~MSKKIU; + break; + case VRC4173_AIU_CLOCK: + vrc4173_cmuclkmsk &= ~MSKAIU; + break; + case VRC4173_PS2_CH1_CLOCK: + vrc4173_cmuclkmsk &= ~MSKPS2CH1; + break; + case VRC4173_PS2_CH2_CLOCK: + vrc4173_cmuclkmsk &= ~MSKPS2CH2; + break; + case VRC4173_USBU_PCI_CLOCK: + set_cmusrst(USBRST); + vrc4173_cmuclkmsk &= ~MSKUSB; + break; + case VRC4173_CARDU1_PCI_CLOCK: + set_cmusrst(CARD1RST); + vrc4173_cmuclkmsk &= ~MSKCARD1; + break; + case VRC4173_CARDU2_PCI_CLOCK: + set_cmusrst(CARD2RST); + vrc4173_cmuclkmsk &= ~MSKCARD2; + break; + case VRC4173_AC97U_PCI_CLOCK: + set_cmusrst(AC97RST); + vrc4173_cmuclkmsk &= ~MSKAC97; + break; + case VRC4173_USBU_48MHz_CLOCK: + set_cmusrst(USBRST); + vrc4173_cmuclkmsk &= ~MSK48MUSB; + break; + case VRC4173_EXT_48MHz_CLOCK: + vrc4173_cmuclkmsk &= ~MSK48MPIN; + break; + case VRC4173_48MHz_CLOCK: + vrc4173_cmuclkmsk &= ~MSK48MOSC; + break; + default: + printk(KERN_WARNING "vrc4173_mask_clock: Invalid CLOCK value %u\n", clock); + break; + } + + vrc4173_outw(vrc4173_cmuclkmsk, VRC4173_CMUCLKMSK); + + switch (clock) { + case VRC4173_USBU_PCI_CLOCK: + case VRC4173_USBU_48MHz_CLOCK: + clear_cmusrst(USBRST); + break; + case VRC4173_CARDU1_PCI_CLOCK: + clear_cmusrst(CARD1RST); + break; + case VRC4173_CARDU2_PCI_CLOCK: + clear_cmusrst(CARD2RST); + break; + case VRC4173_AC97U_PCI_CLOCK: + clear_cmusrst(AC97RST); + break; + default: + break; + } + + spin_unlock_irq(&vrc4173_cmu_lock); + } +} + +EXPORT_SYMBOL(vrc4173_mask_clock); + +static inline void vrc4173_cmu_init(void) +{ + vrc4173_cmuclkmsk = vrc4173_inw(VRC4173_CMUCLKMSK); + + spin_lock_init(&vrc4173_cmu_lock); +} + +void vrc4173_select_function(vrc4173_function_t function) +{ + if (vrc4173_initialized) { + spin_lock_irq(&vrc4173_giu_lock); + + switch(function) { + case PS2_CHANNEL1: + vrc4173_selectreg |= SEL2; + break; + case PS2_CHANNEL2: + vrc4173_selectreg |= SEL1; + break; + case TOUCHPANEL: + vrc4173_selectreg &= SEL2 | SEL1 | SEL0; + break; + case KEYBOARD_8SCANLINES: + vrc4173_selectreg &= SEL3 | SEL2 | SEL1; + break; + case KEYBOARD_10SCANLINES: + vrc4173_selectreg &= SEL3 | SEL2; + break; + case KEYBOARD_12SCANLINES: + vrc4173_selectreg &= SEL3; + break; + case GPIO_0_15PINS: + vrc4173_selectreg |= SEL0; + break; + case GPIO_16_20PINS: + vrc4173_selectreg |= SEL3; + break; + } + + vrc4173_outw(vrc4173_selectreg, VRC4173_SELECTREG); + + spin_unlock_irq(&vrc4173_giu_lock); + } +} + +EXPORT_SYMBOL(vrc4173_select_function); + +static inline void vrc4173_giu_init(void) +{ + vrc4173_selectreg = vrc4173_inw(VRC4173_SELECTREG); + + spin_lock_init(&vrc4173_giu_lock); +} + +void vrc4173_enable_piuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MPIUINTREG); + val |= mask; + vrc4173_outw(val, VRC4173_MPIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_enable_piuint); + +void vrc4173_disable_piuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_PIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MPIUINTREG); + val &= ~mask; + vrc4173_outw(val, VRC4173_MPIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_disable_piuint); + +void vrc4173_enable_aiuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MAIUINTREG); + val |= mask; + vrc4173_outw(val, VRC4173_MAIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_enable_aiuint); + +void vrc4173_disable_aiuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_AIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MAIUINTREG); + val &= ~mask; + vrc4173_outw(val, VRC4173_MAIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_disable_aiuint); + +void vrc4173_enable_kiuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MKIUINTREG); + val |= mask; + vrc4173_outw(val, VRC4173_MKIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_enable_kiuint); + +void vrc4173_disable_kiuint(uint16_t mask) +{ + irq_desc_t *desc = irq_desc + VRC4173_KIU_IRQ; + unsigned long flags; + uint16_t val; + + spin_lock_irqsave(&desc->lock, flags); + val = vrc4173_inw(VRC4173_MKIUINTREG); + val &= ~mask; + vrc4173_outw(val, VRC4173_MKIUINTREG); + spin_unlock_irqrestore(&desc->lock, flags); +} + +EXPORT_SYMBOL(vrc4173_disable_kiuint); + +static void enable_vrc4173_irq(unsigned int irq) +{ + uint16_t val; + + val = vrc4173_inw(VRC4173_MSYSINT1REG); + val |= (uint16_t)1 << (irq - VRC4173_IRQ_BASE); + vrc4173_outw(val, VRC4173_MSYSINT1REG); +} + +static void disable_vrc4173_irq(unsigned int irq) +{ + uint16_t val; + + val = vrc4173_inw(VRC4173_MSYSINT1REG); + val &= ~((uint16_t)1 << (irq - VRC4173_IRQ_BASE)); + vrc4173_outw(val, VRC4173_MSYSINT1REG); +} + +static unsigned int startup_vrc4173_irq(unsigned int irq) +{ + enable_vrc4173_irq(irq); + return 0; /* never anything pending */ +} + +#define shutdown_vrc4173_irq disable_vrc4173_irq +#define ack_vrc4173_irq disable_vrc4173_irq + +static void end_vrc4173_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + enable_vrc4173_irq(irq); +} + +static struct hw_interrupt_type vrc4173_irq_type = { + .typename = "VRC4173", + .startup = startup_vrc4173_irq, + .shutdown = shutdown_vrc4173_irq, + .enable = enable_vrc4173_irq, + .disable = disable_vrc4173_irq, + .ack = ack_vrc4173_irq, + .end = end_vrc4173_irq, +}; + +static int vrc4173_get_irq_number(int irq) +{ + uint16_t status, mask; + int i; + + status = vrc4173_inw(VRC4173_SYSINT1REG); + mask = vrc4173_inw(VRC4173_MSYSINT1REG); + + status &= mask; + if (status) { + for (i = 0; i < 16; i++) + if (status & (0x0001 << i)) + return VRC4173_IRQ(i); + } + + return -EINVAL; +} + +static inline int vrc4173_icu_init(int cascade_irq) +{ + int i; + + if (cascade_irq < GIU_IRQ(0) || cascade_irq > GIU_IRQ(15)) + return -EINVAL; + + vrc4173_outw(0, VRC4173_MSYSINT1REG); + + 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_module_init(&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); -- cgit v1.2.3