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547 lines
13 KiB
C
547 lines
13 KiB
C
/*
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* $Id$
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*
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* Copyright (C) 2006, 2007 OpenWrt.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/ar7/vlynq.h>
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#define PER_DEVICE_IRQS 32
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#define VLYNQ_CTRL_PM_ENABLE 0x80000000
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#define VLYNQ_CTRL_CLOCK_INT 0x00008000
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#define VLYNQ_CTRL_CLOCK_DIV(x) ((x & 7) << 16)
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#define VLYNQ_CTRL_INT_LOCAL 0x00004000
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#define VLYNQ_CTRL_INT_ENABLE 0x00002000
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#define VLYNQ_CTRL_INT_VECTOR(x) ((x & 0x1f) << 8)
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#define VLYNQ_CTRL_INT2CFG 0x00000080
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#define VLYNQ_CTRL_RESET 0x00000001
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#define VLYNQ_STATUS_RERROR 0x00000100
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#define VLYNQ_STATUS_LERROR 0x00000080
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#define VLYNQ_STATUS_LINK 0x00000001
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#define VINT_ENABLE 0x00000100
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#define VINT_TYPE_EDGE 0x00000080
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#define VINT_LEVEL_LOW 0x00000040
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#define VINT_VECTOR(x) (x & 0x1f)
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#define VINT_OFFSET(irq) (8 * ((irq) % 4))
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#define VLYNQ_AUTONEGO_V2 0x00010000
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struct vlynq_regs {
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volatile u32 revision;
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volatile u32 control;
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volatile u32 status;
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volatile u32 int_prio;
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volatile u32 int_status;
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volatile u32 int_pending;
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volatile u32 int_ptr;
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volatile u32 tx_offset;
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volatile struct vlynq_mapping rx_mapping[4];
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volatile u32 chip;
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volatile u32 autonego;
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volatile u32 unused[6];
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volatile u32 int_device[8];
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} __attribute__ ((packed));
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#ifdef VLYNQ_DEBUG
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static void vlynq_dump_regs(struct vlynq_device *dev)
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{
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int i;
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printk("VLYNQ local=%p remote=%p\n", dev->local, dev->remote);
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for (i = 0; i < 32; i++) {
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printk("VLYNQ: local %d: %08x\n", i + 1, ((u32 *)dev->local)[i]);
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printk("VLYNQ: remote %d: %08x\n", i + 1, ((u32 *)dev->remote)[i]);
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}
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}
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static void vlynq_dump_mem(u32 *base, int count)
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{
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int i;
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for (i = 0; i < (count + 3) / 4; i++) {
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if (i % 4 == 0) printk("\nMEM[0x%04x]:", i * 4);
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printk(" 0x%08x", *(base + i));
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}
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printk("\n");
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}
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#endif
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int vlynq_linked(struct vlynq_device *dev)
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{
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int i;
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for (i = 0; i < 10; i++)
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if (dev->local->status & VLYNQ_STATUS_LINK) {
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printk("%s: linked\n", dev->dev.bus_id);
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return 1;
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} else {
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mdelay(1);
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}
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return 0;
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}
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static void vlynq_irq_unmask(unsigned int irq)
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{
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volatile u32 val;
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struct vlynq_device *dev = irq_desc[irq].chip_data;
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int virq;
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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val = dev->remote->int_device[virq >> 2];
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val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
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dev->remote->int_device[virq >> 2] = val;
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}
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static void vlynq_irq_mask(unsigned int irq)
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{
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volatile u32 val;
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struct vlynq_device *dev = irq_desc[irq].chip_data;
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int virq;
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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val = dev->remote->int_device[virq >> 2];
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val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
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dev->remote->int_device[virq >> 2] = val;
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}
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static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
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{
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volatile u32 val;
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struct vlynq_device *dev = irq_desc[irq].chip_data;
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int virq;
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BUG_ON(!dev);
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virq = irq - dev->irq_start;
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val = dev->remote->int_device[virq >> 2];
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switch (flow_type & IRQ_TYPE_SENSE_MASK) {
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case IRQ_TYPE_EDGE_RISING:
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case IRQ_TYPE_EDGE_FALLING:
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case IRQ_TYPE_EDGE_BOTH:
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val |= VINT_TYPE_EDGE << VINT_OFFSET(virq);
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val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
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break;
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case IRQ_TYPE_LEVEL_HIGH:
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val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
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val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
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break;
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case IRQ_TYPE_LEVEL_LOW:
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val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
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val |= VINT_LEVEL_LOW << VINT_OFFSET(virq);
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break;
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default:
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return -EINVAL;
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}
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dev->remote->int_device[virq >> 2] = val;
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return 0;
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}
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static irqreturn_t vlynq_irq(int irq, void *dev_id)
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{
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struct vlynq_device *dev = dev_id;
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u32 status, ack;
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int virq = 0;
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status = dev->local->int_status;
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dev->local->int_status = status;
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if (status & (1 << dev->local_irq)) { /* Local vlynq IRQ. Ack */
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ack = dev->local->status;
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dev->local->status = ack;
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}
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if (status & (1 << dev->remote_irq)) { /* Remote vlynq IRQ. Ack */
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ack = dev->remote->status;
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dev->remote->status = ack;
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}
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status &= ~((1 << dev->local_irq) | (1 << dev->remote_irq));
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while (status) {
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if (status & 1) /* Remote device IRQ. Pass. */
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do_IRQ(dev->irq_start + virq);
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status >>= 1;
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virq++;
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}
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return IRQ_HANDLED;
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}
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static struct irq_chip vlynq_irq_chip = {
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.typename = "VLYNQ",
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.name = "vlynq",
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.unmask = vlynq_irq_unmask,
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.mask = vlynq_irq_mask,
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.set_type = vlynq_irq_type,
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};
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static int vlynq_setup_irq(struct vlynq_device *dev)
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{
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u32 val;
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int i;
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if (dev->local_irq == dev->remote_irq) {
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printk("%s: local vlynq irq should be different from remote\n",
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dev->dev.bus_id);
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return -EINVAL;
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}
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val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
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val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
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VLYNQ_CTRL_INT2CFG;
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dev->local->int_ptr = 0x14;
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dev->local->control |= val;
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val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
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val |= VLYNQ_CTRL_INT_ENABLE;
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dev->remote->int_ptr = 0x14;
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dev->remote->control |= val;
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for (i = 0; i < PER_DEVICE_IRQS; i++) {
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if ((i == dev->local_irq) || (i == dev->remote_irq))
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continue;
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irq_desc[dev->irq_start + i].status = IRQ_DISABLED;
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irq_desc[dev->irq_start + i].action = 0;
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irq_desc[dev->irq_start + i].depth = 1;
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irq_desc[dev->irq_start + i].chip = &vlynq_irq_chip;
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irq_desc[dev->irq_start + i].chip_data = dev;
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dev->remote->int_device[i >> 2] = 0;
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}
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if (request_irq(dev->irq, vlynq_irq, SA_SHIRQ, "vlynq", dev)) {
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printk("%s: request_irq failed\n", dev->dev.bus_id);
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return -EAGAIN;
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}
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return 0;
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}
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static void vlynq_free_irq(struct vlynq_device *dev)
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{
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free_irq(dev->irq, dev);
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}
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static void vlynq_device_release(struct device *dev)
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{
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struct vlynq_device *vdev = to_vlynq_device(dev);
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kfree(vdev);
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}
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static int vlynq_device_probe(struct device *dev)
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{
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struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
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if (drv->probe)
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return drv->probe(to_vlynq_device(dev));
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return 0;
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}
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static int vlynq_device_remove(struct device *dev)
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{
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struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
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if (drv->remove)
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return drv->remove(to_vlynq_device(dev));
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return 0;
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}
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int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
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{
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driver->driver.name = driver->name;
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driver->driver.bus = &vlynq_bus_type;
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/* driver->driver.owner = owner;*/
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return driver_register(&driver->driver);
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}
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EXPORT_SYMBOL(__vlynq_register_driver);
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void vlynq_unregister_driver(struct vlynq_driver *driver)
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{
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driver_unregister(&driver->driver);
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}
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EXPORT_SYMBOL(vlynq_unregister_driver);
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int vlynq_device_enable(struct vlynq_device *dev)
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{
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u32 val;
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int result;
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struct plat_vlynq_ops *ops = dev->dev.platform_data;
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result = ops->on(dev);
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if (result)
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return result;
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dev->local->control = 0;
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dev->remote->control = 0;
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if (vlynq_linked(dev))
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return vlynq_setup_irq(dev);
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for (val = 0; val < 8; val++) {
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dev->local->control = VLYNQ_CTRL_CLOCK_DIV(val) |
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VLYNQ_CTRL_CLOCK_INT;
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if (vlynq_linked(dev))
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return vlynq_setup_irq(dev);
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}
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return -ENODEV;
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}
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void vlynq_device_disable(struct vlynq_device *dev)
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{
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struct plat_vlynq_ops *ops = dev->dev.platform_data;
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vlynq_free_irq(dev);
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ops->off(dev);
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}
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u32 vlynq_local_id(struct vlynq_device *dev)
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{
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return dev->local->chip;
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}
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u32 vlynq_remote_id(struct vlynq_device *dev)
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{
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return dev->remote->chip;
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}
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void vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
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struct vlynq_mapping *mapping)
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{
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int i;
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dev->local->tx_offset = tx_offset;
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for (i = 0; i < 4; i++) {
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dev->local->rx_mapping[i].offset = mapping[i].offset;
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dev->local->rx_mapping[i].size = mapping[i].size;
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}
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}
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void vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
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struct vlynq_mapping *mapping)
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{
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int i;
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dev->remote->tx_offset = tx_offset;
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for (i = 0; i < 4; i++) {
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dev->remote->rx_mapping[i].offset = mapping[i].offset;
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dev->remote->rx_mapping[i].size = mapping[i].size;
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}
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}
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int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
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{
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if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
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return -EINVAL;
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if ((virq == dev->local_irq) || (virq == dev->remote_irq))
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return -EINVAL;
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return dev->irq_start + virq;
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}
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int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
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{
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if ((irq < dev->irq_start) || (irq >= dev->irq_start + PER_DEVICE_IRQS))
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return -EINVAL;
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return irq - dev->irq_start;
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}
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int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
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{
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if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
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return -EINVAL;
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if (virq == dev->remote_irq)
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return -EINVAL;
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dev->local_irq = virq;
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return 0;
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}
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int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
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{
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if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
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return -EINVAL;
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if (virq == dev->local_irq)
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return -EINVAL;
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dev->remote_irq = virq;
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return 0;
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}
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static int vlynq_probe(struct platform_device *pdev)
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{
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struct vlynq_device *dev;
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struct resource *regs_res, *mem_res, *irq_res;
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int len, result;
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if (strcmp(pdev->name, "vlynq"))
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return -ENODEV;
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regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
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if (!regs_res)
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return -ENODEV;
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mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
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if (!mem_res)
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return -ENODEV;
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irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
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if (!irq_res)
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return -ENODEV;
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dev = kmalloc(sizeof(struct vlynq_device), GFP_KERNEL);
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if (!dev) {
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printk(KERN_ERR "vlynq: failed to allocate device structure\n");
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return -ENOMEM;
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}
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memset(dev, 0, sizeof(struct vlynq_device));
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dev->id = pdev->id;
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dev->dev.bus = &vlynq_bus_type;
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dev->dev.parent = &pdev->dev;
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snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
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dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
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dev->dev.platform_data = pdev->dev.platform_data;
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dev->dev.release = vlynq_device_release;
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dev->regs_start = regs_res->start;
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dev->regs_end = regs_res->end;
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dev->mem_start = mem_res->start;
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dev->mem_end = mem_res->end;
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len = regs_res->end - regs_res->start;
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if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
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printk("%s: Can't request vlynq registers\n", dev->dev.bus_id);
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result = -ENXIO;
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goto fail_request;
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}
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dev->local = ioremap_nocache(regs_res->start, len);
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if (!dev->local) {
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printk("%s: Can't remap vlynq registers\n", dev->dev.bus_id);
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result = -ENXIO;
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goto fail_remap;
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}
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dev->remote = (struct vlynq_regs *)((u32)dev->local + 128);
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dev->irq = platform_get_irq_byname(pdev, "irq");
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dev->irq_start = irq_res->start;
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dev->irq_end = irq_res->end;
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dev->local_irq = 31;
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dev->remote_irq = 30;
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if (device_register(&dev->dev))
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goto fail_register;
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platform_set_drvdata(pdev, dev);
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printk("%s: regs 0x%p, irq %d, mem 0x%p\n",
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dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
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(void *)dev->mem_start);
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return 0;
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fail_register:
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fail_remap:
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iounmap(dev->local);
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fail_request:
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release_mem_region(regs_res->start, len);
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kfree(dev);
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return result;
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}
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static int vlynq_remove(struct platform_device *pdev)
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{
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struct vlynq_device *dev = platform_get_drvdata(pdev);
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device_unregister(&dev->dev);
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release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
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kfree(dev);
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return 0;
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}
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static struct platform_driver vlynq_driver = {
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.driver.name = "vlynq",
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.probe = vlynq_probe,
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.remove = vlynq_remove,
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};
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struct bus_type vlynq_bus_type = {
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.name = "vlynq",
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|
.probe = vlynq_device_probe,
|
|
.remove = vlynq_device_remove,
|
|
};
|
|
EXPORT_SYMBOL(vlynq_bus_type);
|
|
|
|
#ifdef CONFIG_PCI
|
|
extern void vlynq_pci_init(void);
|
|
#endif
|
|
int __init vlynq_init(void)
|
|
{
|
|
int res = 0;
|
|
|
|
res = bus_register(&vlynq_bus_type);
|
|
if (res)
|
|
goto fail_bus;
|
|
|
|
res = platform_driver_register(&vlynq_driver);
|
|
if (res)
|
|
goto fail_platform;
|
|
|
|
#ifdef CONFIG_PCI
|
|
vlynq_pci_init();
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
fail_platform:
|
|
bus_unregister(&vlynq_bus_type);
|
|
fail_bus:
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
void __devexit vlynq_exit(void)
|
|
{
|
|
platform_driver_unregister(&vlynq_driver);
|
|
bus_unregister(&vlynq_bus_type);
|
|
}
|
|
*/
|
|
|
|
|
|
subsys_initcall(vlynq_init);
|