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![Julia Lawall](/assets/img/avatar_default.png)
In this case, the calls to request_mem_region, ioremap, and release_mem_region all have a consistent length argument, len, but since in other files (res->end - res->start) + 1, equivalent to resource_size(res), is used for a resource-typed structure res, one could consider whether the same should be done here. The problem was found using the following semantic patch: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ struct resource *res; @@ - (res->end - res->start) + 1 + resource_size(res) @@ struct resource *res; @@ - res->end - res->start + BAD(resource_size(res)) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
813 lines
19 KiB
C
813 lines
19 KiB
C
/*
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* Copyright (C) 2006, 2007 Eugene Konev <ejka@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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* Parts of the VLYNQ specification can be found here:
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* http://www.ti.com/litv/pdf/sprue36a
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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/device.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/vlynq.h>
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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_CTRL_CLOCK_MASK (0x7 << 16)
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#define VLYNQ_INT_OFFSET 0x00000014
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#define VLYNQ_REMOTE_OFFSET 0x00000080
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#define VLYNQ_STATUS_LINK 0x00000001
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#define VLYNQ_STATUS_LERROR 0x00000080
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#define VLYNQ_STATUS_RERROR 0x00000100
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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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u32 revision;
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u32 control;
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u32 status;
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u32 int_prio;
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u32 int_status;
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u32 int_pending;
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u32 int_ptr;
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u32 tx_offset;
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struct vlynq_mapping rx_mapping[4];
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u32 chip;
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u32 autonego;
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u32 unused[6];
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u32 int_device[8];
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};
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#ifdef CONFIG_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(KERN_DEBUG "VLYNQ local=%p remote=%p\n",
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dev->local, dev->remote);
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for (i = 0; i < 32; i++) {
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printk(KERN_DEBUG "VLYNQ: local %d: %08x\n",
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i + 1, ((u32 *)dev->local)[i]);
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printk(KERN_DEBUG "VLYNQ: remote %d: %08x\n",
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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)
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printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
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printk(KERN_DEBUG " 0x%08x", *(base + i));
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}
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printk(KERN_DEBUG "\n");
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}
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#endif
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/* Check the VLYNQ link status with a given device */
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static 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 < 100; i++)
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if (readl(&dev->local->status) & VLYNQ_STATUS_LINK)
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return 1;
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else
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cpu_relax();
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return 0;
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}
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static void vlynq_reset(struct vlynq_device *dev)
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{
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writel(readl(&dev->local->control) | VLYNQ_CTRL_RESET,
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&dev->local->control);
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/* Wait for the devices to finish resetting */
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msleep(5);
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/* Remove reset bit */
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writel(readl(&dev->local->control) & ~VLYNQ_CTRL_RESET,
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&dev->local->control);
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/* Give some time for the devices to settle */
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msleep(5);
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}
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static void vlynq_irq_unmask(unsigned int irq)
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{
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u32 val;
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struct vlynq_device *dev = get_irq_chip_data(irq);
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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 = readl(&dev->remote->int_device[virq >> 2]);
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val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
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writel(val, &dev->remote->int_device[virq >> 2]);
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}
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static void vlynq_irq_mask(unsigned int irq)
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{
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u32 val;
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struct vlynq_device *dev = get_irq_chip_data(irq);
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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 = readl(&dev->remote->int_device[virq >> 2]);
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val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
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writel(val, &dev->remote->int_device[virq >> 2]);
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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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u32 val;
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struct vlynq_device *dev = get_irq_chip_data(irq);
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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 = readl(&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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writel(val, &dev->remote->int_device[virq >> 2]);
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return 0;
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}
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static void vlynq_local_ack(unsigned int irq)
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{
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struct vlynq_device *dev = get_irq_chip_data(irq);
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u32 status = readl(&dev->local->status);
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pr_debug("%s: local status: 0x%08x\n",
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dev_name(&dev->dev), status);
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writel(status, &dev->local->status);
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}
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static void vlynq_remote_ack(unsigned int irq)
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{
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struct vlynq_device *dev = get_irq_chip_data(irq);
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u32 status = readl(&dev->remote->status);
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pr_debug("%s: remote status: 0x%08x\n",
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dev_name(&dev->dev), status);
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writel(status, &dev->remote->status);
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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;
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int virq = 0;
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status = readl(&dev->local->int_status);
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writel(status, &dev->local->int_status);
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if (unlikely(!status))
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spurious_interrupt();
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while (status) {
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if (status & 1)
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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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.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 struct irq_chip vlynq_local_chip = {
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.name = "vlynq local error",
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.unmask = vlynq_irq_unmask,
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.mask = vlynq_irq_mask,
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.ack = vlynq_local_ack,
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};
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static struct irq_chip vlynq_remote_chip = {
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.name = "vlynq local error",
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.unmask = vlynq_irq_unmask,
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.mask = vlynq_irq_mask,
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.ack = vlynq_remote_ack,
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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, virq;
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if (dev->local_irq == dev->remote_irq) {
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printk(KERN_ERR
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"%s: local vlynq irq should be different from remote\n",
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dev_name(&dev->dev));
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return -EINVAL;
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}
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/* Clear local and remote error bits */
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writel(readl(&dev->local->status), &dev->local->status);
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writel(readl(&dev->remote->status), &dev->remote->status);
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/* Now setup interrupts */
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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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val |= readl(&dev->local->control);
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writel(VLYNQ_INT_OFFSET, &dev->local->int_ptr);
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writel(val, &dev->local->control);
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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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val |= readl(&dev->remote->control);
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writel(VLYNQ_INT_OFFSET, &dev->remote->int_ptr);
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writel(val, &dev->remote->int_ptr);
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writel(val, &dev->remote->control);
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for (i = dev->irq_start; i <= dev->irq_end; i++) {
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virq = i - dev->irq_start;
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if (virq == dev->local_irq) {
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set_irq_chip_and_handler(i, &vlynq_local_chip,
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handle_level_irq);
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set_irq_chip_data(i, dev);
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} else if (virq == dev->remote_irq) {
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set_irq_chip_and_handler(i, &vlynq_remote_chip,
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handle_level_irq);
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set_irq_chip_data(i, dev);
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} else {
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set_irq_chip_and_handler(i, &vlynq_irq_chip,
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handle_simple_irq);
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set_irq_chip_data(i, dev);
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writel(0, &dev->remote->int_device[virq >> 2]);
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}
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}
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if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) {
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printk(KERN_ERR "%s: request_irq failed\n",
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dev_name(&dev->dev));
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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_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_match(struct device *dev,
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struct device_driver *drv)
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{
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struct vlynq_device *vdev = to_vlynq_device(dev);
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struct vlynq_driver *vdrv = to_vlynq_driver(drv);
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struct vlynq_device_id *ids = vdrv->id_table;
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while (ids->id) {
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if (ids->id == vdev->dev_id) {
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vdev->divisor = ids->divisor;
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vlynq_set_drvdata(vdev, ids);
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printk(KERN_INFO "Driver found for VLYNQ "
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"device: %08x\n", vdev->dev_id);
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return 1;
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}
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printk(KERN_DEBUG "Not using the %08x VLYNQ device's driver"
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" for VLYNQ device: %08x\n", ids->id, vdev->dev_id);
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ids++;
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}
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return 0;
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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_device *vdev = to_vlynq_device(dev);
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struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
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struct vlynq_device_id *id = vlynq_get_drvdata(vdev);
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int result = -ENODEV;
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if (drv->probe)
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result = drv->probe(vdev, id);
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if (result)
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put_device(dev);
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return result;
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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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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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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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/*
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* A VLYNQ remote device can clock the VLYNQ bus master
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* using a dedicated clock line. In that case, both the
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* remove device and the bus master should have the same
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* serial clock dividers configured. Iterate through the
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* 8 possible dividers until we actually link with the
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* device.
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*/
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static int __vlynq_try_remote(struct vlynq_device *dev)
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{
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int i;
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vlynq_reset(dev);
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for (i = dev->dev_id ? vlynq_rdiv2 : vlynq_rdiv8; dev->dev_id ?
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i <= vlynq_rdiv8 : i >= vlynq_rdiv2;
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dev->dev_id ? i++ : i--) {
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if (!vlynq_linked(dev))
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break;
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writel((readl(&dev->remote->control) &
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~VLYNQ_CTRL_CLOCK_MASK) |
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VLYNQ_CTRL_CLOCK_INT |
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VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
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&dev->remote->control);
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writel((readl(&dev->local->control)
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& ~(VLYNQ_CTRL_CLOCK_INT |
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VLYNQ_CTRL_CLOCK_MASK)) |
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VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
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&dev->local->control);
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if (vlynq_linked(dev)) {
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printk(KERN_DEBUG
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"%s: using remote clock divisor %d\n",
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dev_name(&dev->dev), i - vlynq_rdiv1 + 1);
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dev->divisor = i;
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return 0;
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} else {
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vlynq_reset(dev);
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}
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}
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return -ENODEV;
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}
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/*
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* A VLYNQ remote device can be clocked by the VLYNQ bus
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* master using a dedicated clock line. In that case, only
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* the bus master configures the serial clock divider.
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* Iterate through the 8 possible dividers until we
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* actually get a link with the device.
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*/
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static int __vlynq_try_local(struct vlynq_device *dev)
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{
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int i;
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vlynq_reset(dev);
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for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ?
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i <= vlynq_ldiv8 : i >= vlynq_ldiv2;
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dev->dev_id ? i++ : i--) {
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writel((readl(&dev->local->control) &
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~VLYNQ_CTRL_CLOCK_MASK) |
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VLYNQ_CTRL_CLOCK_INT |
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VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1),
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&dev->local->control);
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if (vlynq_linked(dev)) {
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printk(KERN_DEBUG
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"%s: using local clock divisor %d\n",
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dev_name(&dev->dev), i - vlynq_ldiv1 + 1);
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dev->divisor = i;
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return 0;
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} else {
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vlynq_reset(dev);
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}
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}
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return -ENODEV;
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}
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/*
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* When using external clocking method, serial clock
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* is supplied by an external oscillator, therefore we
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* should mask the local clock bit in the clock control
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* register for both the bus master and the remote device.
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*/
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static int __vlynq_try_external(struct vlynq_device *dev)
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{
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vlynq_reset(dev);
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if (!vlynq_linked(dev))
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return -ENODEV;
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writel((readl(&dev->remote->control) &
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~VLYNQ_CTRL_CLOCK_INT),
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&dev->remote->control);
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|
|
writel((readl(&dev->local->control) &
|
|
~VLYNQ_CTRL_CLOCK_INT),
|
|
&dev->local->control);
|
|
|
|
if (vlynq_linked(dev)) {
|
|
printk(KERN_DEBUG "%s: using external clock\n",
|
|
dev_name(&dev->dev));
|
|
dev->divisor = vlynq_div_external;
|
|
return 0;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int __vlynq_enable_device(struct vlynq_device *dev)
|
|
{
|
|
int result;
|
|
struct plat_vlynq_ops *ops = dev->dev.platform_data;
|
|
|
|
result = ops->on(dev);
|
|
if (result)
|
|
return result;
|
|
|
|
switch (dev->divisor) {
|
|
case vlynq_div_external:
|
|
case vlynq_div_auto:
|
|
/* When the device is brought from reset it should have clock
|
|
* generation negotiated by hardware.
|
|
* Check which device is generating clocks and perform setup
|
|
* accordingly */
|
|
if (vlynq_linked(dev) && readl(&dev->remote->control) &
|
|
VLYNQ_CTRL_CLOCK_INT) {
|
|
if (!__vlynq_try_remote(dev) ||
|
|
!__vlynq_try_local(dev) ||
|
|
!__vlynq_try_external(dev))
|
|
return 0;
|
|
} else {
|
|
if (!__vlynq_try_external(dev) ||
|
|
!__vlynq_try_local(dev) ||
|
|
!__vlynq_try_remote(dev))
|
|
return 0;
|
|
}
|
|
break;
|
|
case vlynq_ldiv1:
|
|
case vlynq_ldiv2:
|
|
case vlynq_ldiv3:
|
|
case vlynq_ldiv4:
|
|
case vlynq_ldiv5:
|
|
case vlynq_ldiv6:
|
|
case vlynq_ldiv7:
|
|
case vlynq_ldiv8:
|
|
writel(VLYNQ_CTRL_CLOCK_INT |
|
|
VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
|
|
vlynq_ldiv1), &dev->local->control);
|
|
writel(0, &dev->remote->control);
|
|
if (vlynq_linked(dev)) {
|
|
printk(KERN_DEBUG
|
|
"%s: using local clock divisor %d\n",
|
|
dev_name(&dev->dev),
|
|
dev->divisor - vlynq_ldiv1 + 1);
|
|
return 0;
|
|
}
|
|
break;
|
|
case vlynq_rdiv1:
|
|
case vlynq_rdiv2:
|
|
case vlynq_rdiv3:
|
|
case vlynq_rdiv4:
|
|
case vlynq_rdiv5:
|
|
case vlynq_rdiv6:
|
|
case vlynq_rdiv7:
|
|
case vlynq_rdiv8:
|
|
writel(0, &dev->local->control);
|
|
writel(VLYNQ_CTRL_CLOCK_INT |
|
|
VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
|
|
vlynq_rdiv1), &dev->remote->control);
|
|
if (vlynq_linked(dev)) {
|
|
printk(KERN_DEBUG
|
|
"%s: using remote clock divisor %d\n",
|
|
dev_name(&dev->dev),
|
|
dev->divisor - vlynq_rdiv1 + 1);
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
ops->off(dev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
int vlynq_enable_device(struct vlynq_device *dev)
|
|
{
|
|
struct plat_vlynq_ops *ops = dev->dev.platform_data;
|
|
int result = -ENODEV;
|
|
|
|
result = __vlynq_enable_device(dev);
|
|
if (result)
|
|
return result;
|
|
|
|
result = vlynq_setup_irq(dev);
|
|
if (result)
|
|
ops->off(dev);
|
|
|
|
dev->enabled = !result;
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(vlynq_enable_device);
|
|
|
|
|
|
void vlynq_disable_device(struct vlynq_device *dev)
|
|
{
|
|
struct plat_vlynq_ops *ops = dev->dev.platform_data;
|
|
|
|
dev->enabled = 0;
|
|
free_irq(dev->irq, dev);
|
|
ops->off(dev);
|
|
}
|
|
EXPORT_SYMBOL(vlynq_disable_device);
|
|
|
|
int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
|
|
struct vlynq_mapping *mapping)
|
|
{
|
|
int i;
|
|
|
|
if (!dev->enabled)
|
|
return -ENXIO;
|
|
|
|
writel(tx_offset, &dev->local->tx_offset);
|
|
for (i = 0; i < 4; i++) {
|
|
writel(mapping[i].offset, &dev->local->rx_mapping[i].offset);
|
|
writel(mapping[i].size, &dev->local->rx_mapping[i].size);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vlynq_set_local_mapping);
|
|
|
|
int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
|
|
struct vlynq_mapping *mapping)
|
|
{
|
|
int i;
|
|
|
|
if (!dev->enabled)
|
|
return -ENXIO;
|
|
|
|
writel(tx_offset, &dev->remote->tx_offset);
|
|
for (i = 0; i < 4; i++) {
|
|
writel(mapping[i].offset, &dev->remote->rx_mapping[i].offset);
|
|
writel(mapping[i].size, &dev->remote->rx_mapping[i].size);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vlynq_set_remote_mapping);
|
|
|
|
int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
|
|
{
|
|
int irq = dev->irq_start + virq;
|
|
if (dev->enabled)
|
|
return -EBUSY;
|
|
|
|
if ((irq < dev->irq_start) || (irq > dev->irq_end))
|
|
return -EINVAL;
|
|
|
|
if (virq == dev->remote_irq)
|
|
return -EINVAL;
|
|
|
|
dev->local_irq = virq;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vlynq_set_local_irq);
|
|
|
|
int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
|
|
{
|
|
int irq = dev->irq_start + virq;
|
|
if (dev->enabled)
|
|
return -EBUSY;
|
|
|
|
if ((irq < dev->irq_start) || (irq > dev->irq_end))
|
|
return -EINVAL;
|
|
|
|
if (virq == dev->local_irq)
|
|
return -EINVAL;
|
|
|
|
dev->remote_irq = virq;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(vlynq_set_remote_irq);
|
|
|
|
static int vlynq_probe(struct platform_device *pdev)
|
|
{
|
|
struct vlynq_device *dev;
|
|
struct resource *regs_res, *mem_res, *irq_res;
|
|
int len, result;
|
|
|
|
regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
|
|
if (!regs_res)
|
|
return -ENODEV;
|
|
|
|
mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
|
|
if (!mem_res)
|
|
return -ENODEV;
|
|
|
|
irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
|
|
if (!irq_res)
|
|
return -ENODEV;
|
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
|
if (!dev) {
|
|
printk(KERN_ERR
|
|
"vlynq: failed to allocate device structure\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dev->id = pdev->id;
|
|
dev->dev.bus = &vlynq_bus_type;
|
|
dev->dev.parent = &pdev->dev;
|
|
dev_set_name(&dev->dev, "vlynq%d", dev->id);
|
|
dev->dev.platform_data = pdev->dev.platform_data;
|
|
dev->dev.release = vlynq_device_release;
|
|
|
|
dev->regs_start = regs_res->start;
|
|
dev->regs_end = regs_res->end;
|
|
dev->mem_start = mem_res->start;
|
|
dev->mem_end = mem_res->end;
|
|
|
|
len = resource_size(regs_res);
|
|
if (!request_mem_region(regs_res->start, len, dev_name(&dev->dev))) {
|
|
printk(KERN_ERR "%s: Can't request vlynq registers\n",
|
|
dev_name(&dev->dev));
|
|
result = -ENXIO;
|
|
goto fail_request;
|
|
}
|
|
|
|
dev->local = ioremap(regs_res->start, len);
|
|
if (!dev->local) {
|
|
printk(KERN_ERR "%s: Can't remap vlynq registers\n",
|
|
dev_name(&dev->dev));
|
|
result = -ENXIO;
|
|
goto fail_remap;
|
|
}
|
|
|
|
dev->remote = (struct vlynq_regs *)((void *)dev->local +
|
|
VLYNQ_REMOTE_OFFSET);
|
|
|
|
dev->irq = platform_get_irq_byname(pdev, "irq");
|
|
dev->irq_start = irq_res->start;
|
|
dev->irq_end = irq_res->end;
|
|
dev->local_irq = dev->irq_end - dev->irq_start;
|
|
dev->remote_irq = dev->local_irq - 1;
|
|
|
|
if (device_register(&dev->dev))
|
|
goto fail_register;
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n",
|
|
dev_name(&dev->dev), (void *)dev->regs_start, dev->irq,
|
|
(void *)dev->mem_start);
|
|
|
|
dev->dev_id = 0;
|
|
dev->divisor = vlynq_div_auto;
|
|
result = __vlynq_enable_device(dev);
|
|
if (result == 0) {
|
|
dev->dev_id = readl(&dev->remote->chip);
|
|
((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev);
|
|
}
|
|
if (dev->dev_id)
|
|
printk(KERN_INFO "Found a VLYNQ device: %08x\n", dev->dev_id);
|
|
|
|
return 0;
|
|
|
|
fail_register:
|
|
iounmap(dev->local);
|
|
fail_remap:
|
|
fail_request:
|
|
release_mem_region(regs_res->start, len);
|
|
kfree(dev);
|
|
return result;
|
|
}
|
|
|
|
static int vlynq_remove(struct platform_device *pdev)
|
|
{
|
|
struct vlynq_device *dev = platform_get_drvdata(pdev);
|
|
|
|
device_unregister(&dev->dev);
|
|
iounmap(dev->local);
|
|
release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
|
|
|
|
kfree(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver vlynq_platform_driver = {
|
|
.driver.name = "vlynq",
|
|
.probe = vlynq_probe,
|
|
.remove = __devexit_p(vlynq_remove),
|
|
};
|
|
|
|
struct bus_type vlynq_bus_type = {
|
|
.name = "vlynq",
|
|
.match = vlynq_device_match,
|
|
.probe = vlynq_device_probe,
|
|
.remove = vlynq_device_remove,
|
|
};
|
|
EXPORT_SYMBOL(vlynq_bus_type);
|
|
|
|
static int __devinit vlynq_init(void)
|
|
{
|
|
int res = 0;
|
|
|
|
res = bus_register(&vlynq_bus_type);
|
|
if (res)
|
|
goto fail_bus;
|
|
|
|
res = platform_driver_register(&vlynq_platform_driver);
|
|
if (res)
|
|
goto fail_platform;
|
|
|
|
return 0;
|
|
|
|
fail_platform:
|
|
bus_unregister(&vlynq_bus_type);
|
|
fail_bus:
|
|
return res;
|
|
}
|
|
|
|
static void __devexit vlynq_exit(void)
|
|
{
|
|
platform_driver_unregister(&vlynq_platform_driver);
|
|
bus_unregister(&vlynq_bus_type);
|
|
}
|
|
|
|
module_init(vlynq_init);
|
|
module_exit(vlynq_exit);
|