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-rw-r--r--arch/mips/vr41xx/common/vrc4173.c581
1 files changed, 581 insertions, 0 deletions
diff --git a/arch/mips/vr41xx/common/vrc4173.c b/arch/mips/vr41xx/common/vrc4173.c
new file mode 100644
index 000000000000..5475dd72e264
--- /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 <yyuasa@mvista.com, or source@mvista.com>
+ * Copyright (C) 2004 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
+ * 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#include <asm/vr41xx/vr41xx.h>
+#include <asm/vr41xx/vrc4173.h>
+
+MODULE_DESCRIPTION("NEC VRC4173 base driver for NEC VR4122/4131");
+MODULE_AUTHOR("Yoichi Yuasa <yyuasa@mvista.com>");
+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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 02:37:04 +0000