drivers: add support for the TI VLYNQ bus
Add support for the TI VLYNQ high-speed, serial and packetized bus. This bus allows external devices to be connected to the System-on-Chip and appear in the main system memory just like any memory mapped peripheral. It is widely used in TI's networking and multimedia SoC, including the AR7 SoC. Signed-off-by: Eugene Konev <ejka@imfi.kspu.ru> Signed-off-by: Florian Fainelli <florian@openwrt.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Florian Fainelli
Linus Torvalds
parent
f324edc85e
commit
55e331cf7e
7 changed files with 1011 additions and 0 deletions
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@ -6281,6 +6281,14 @@ F: drivers/net/macvlan.c
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F: include/linux/if_*vlan.h
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F: net/8021q/
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VLYNQ BUS
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P: Florian Fainelli
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M: florian@openwrt.org
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L: openwrt-devel@lists.openwrt.org
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S: Maintained
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F: drivers/vlynq/vlynq.c
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F: include/linux/vlynq.h
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VOLTAGE AND CURRENT REGULATOR FRAMEWORK
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P: Liam Girdwood
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M: lrg@slimlogic.co.uk
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@ -104,6 +104,8 @@ source "drivers/auxdisplay/Kconfig"
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source "drivers/uio/Kconfig"
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source "drivers/vlynq/Kconfig"
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source "drivers/xen/Kconfig"
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source "drivers/staging/Kconfig"
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@ -105,6 +105,7 @@ obj-$(CONFIG_PPC_PS3) += ps3/
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obj-$(CONFIG_OF) += of/
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obj-$(CONFIG_SSB) += ssb/
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obj-$(CONFIG_VIRTIO) += virtio/
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obj-$(CONFIG_VLYNQ) += vlynq/
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obj-$(CONFIG_STAGING) += staging/
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obj-y += platform/
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obj-y += ieee802154/
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20
drivers/vlynq/Kconfig
Normal file
20
drivers/vlynq/Kconfig
Normal file
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@ -0,0 +1,20 @@
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menu "TI VLYNQ"
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config VLYNQ
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bool "TI VLYNQ bus support"
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depends on AR7 && EXPERIMENTAL
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help
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Support for Texas Instruments(R) VLYNQ bus.
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The VLYNQ bus is a high-speed, serial and packetized
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data bus which allows external peripherals of a SoC
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to appear into the system's main memory.
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If unsure, say N
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config VLYNQ_DEBUG
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bool "VLYNQ bus debug"
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depends on VLYNQ && KERNEL_DEBUG
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help
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Turn on VLYNQ bus debugging.
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endmenu
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5
drivers/vlynq/Makefile
Normal file
5
drivers/vlynq/Makefile
Normal file
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@ -0,0 +1,5 @@
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#
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# Makefile for kernel vlynq drivers
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#
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obj-$(CONFIG_VLYNQ) += vlynq.o
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814
drivers/vlynq/vlynq.c
Normal file
814
drivers/vlynq/vlynq.c
Normal file
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@ -0,0 +1,814 @@
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/*
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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/device.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 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
|
||||
* using a dedicated clock line. In that case, both the
|
||||
* remove device and the bus master should have the same
|
||||
* serial clock dividers configured. Iterate through the
|
||||
* 8 possible dividers until we actually link with the
|
||||
* device.
|
||||
*/
|
||||
static int __vlynq_try_remote(struct vlynq_device *dev)
|
||||
{
|
||||
int i;
|
||||
|
||||
vlynq_reset(dev);
|
||||
for (i = dev->dev_id ? vlynq_rdiv2 : vlynq_rdiv8; dev->dev_id ?
|
||||
i <= vlynq_rdiv8 : i >= vlynq_rdiv2;
|
||||
dev->dev_id ? i++ : i--) {
|
||||
|
||||
if (!vlynq_linked(dev))
|
||||
break;
|
||||
|
||||
writel((readl(&dev->remote->control) &
|
||||
~VLYNQ_CTRL_CLOCK_MASK) |
|
||||
VLYNQ_CTRL_CLOCK_INT |
|
||||
VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
|
||||
&dev->remote->control);
|
||||
writel((readl(&dev->local->control)
|
||||
& ~(VLYNQ_CTRL_CLOCK_INT |
|
||||
VLYNQ_CTRL_CLOCK_MASK)) |
|
||||
VLYNQ_CTRL_CLOCK_DIV(i - vlynq_rdiv1),
|
||||
&dev->local->control);
|
||||
|
||||
if (vlynq_linked(dev)) {
|
||||
printk(KERN_DEBUG
|
||||
"%s: using remote clock divisor %d\n",
|
||||
dev_name(&dev->dev), i - vlynq_rdiv1 + 1);
|
||||
dev->divisor = i;
|
||||
return 0;
|
||||
} else {
|
||||
vlynq_reset(dev);
|
||||
}
|
||||
}
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* A VLYNQ remote device can be clocked by the VLYNQ bus
|
||||
* master using a dedicated clock line. In that case, only
|
||||
* the bus master configures the serial clock divider.
|
||||
* Iterate through the 8 possible dividers until we
|
||||
* actually get a link with the device.
|
||||
*/
|
||||
static int __vlynq_try_local(struct vlynq_device *dev)
|
||||
{
|
||||
int i;
|
||||
|
||||
vlynq_reset(dev);
|
||||
|
||||
for (i = dev->dev_id ? vlynq_ldiv2 : vlynq_ldiv8; dev->dev_id ?
|
||||
i <= vlynq_ldiv8 : i >= vlynq_ldiv2;
|
||||
dev->dev_id ? i++ : i--) {
|
||||
|
||||
writel((readl(&dev->local->control) &
|
||||
~VLYNQ_CTRL_CLOCK_MASK) |
|
||||
VLYNQ_CTRL_CLOCK_INT |
|
||||
VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1),
|
||||
&dev->local->control);
|
||||
|
||||
if (vlynq_linked(dev)) {
|
||||
printk(KERN_DEBUG
|
||||
"%s: using local clock divisor %d\n",
|
||||
dev_name(&dev->dev), i - vlynq_ldiv1 + 1);
|
||||
dev->divisor = i;
|
||||
return 0;
|
||||
} else {
|
||||
vlynq_reset(dev);
|
||||
}
|
||||
}
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* When using external clocking method, serial clock
|
||||
* is supplied by an external oscillator, therefore we
|
||||
* should mask the local clock bit in the clock control
|
||||
* register for both the bus master and the remote device.
|
||||
*/
|
||||
static int __vlynq_try_external(struct vlynq_device *dev)
|
||||
{
|
||||
vlynq_reset(dev);
|
||||
if (!vlynq_linked(dev))
|
||||
return -ENODEV;
|
||||
|
||||
writel((readl(&dev->remote->control) &
|
||||
~VLYNQ_CTRL_CLOCK_INT),
|
||||
&dev->remote->control);
|
||||
|
||||
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 = regs_res->end - regs_res->start;
|
||||
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);
|
||||
161
include/linux/vlynq.h
Normal file
161
include/linux/vlynq.h
Normal file
|
|
@ -0,0 +1,161 @@
|
|||
/*
|
||||
* Copyright (C) 2006, 2007 Eugene Konev <ejka@openwrt.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef __VLYNQ_H__
|
||||
#define __VLYNQ_H__
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#define VLYNQ_NUM_IRQS 32
|
||||
|
||||
struct vlynq_mapping {
|
||||
u32 size;
|
||||
u32 offset;
|
||||
};
|
||||
|
||||
enum vlynq_divisor {
|
||||
vlynq_div_auto = 0,
|
||||
vlynq_ldiv1,
|
||||
vlynq_ldiv2,
|
||||
vlynq_ldiv3,
|
||||
vlynq_ldiv4,
|
||||
vlynq_ldiv5,
|
||||
vlynq_ldiv6,
|
||||
vlynq_ldiv7,
|
||||
vlynq_ldiv8,
|
||||
vlynq_rdiv1,
|
||||
vlynq_rdiv2,
|
||||
vlynq_rdiv3,
|
||||
vlynq_rdiv4,
|
||||
vlynq_rdiv5,
|
||||
vlynq_rdiv6,
|
||||
vlynq_rdiv7,
|
||||
vlynq_rdiv8,
|
||||
vlynq_div_external
|
||||
};
|
||||
|
||||
struct vlynq_device_id {
|
||||
u32 id;
|
||||
enum vlynq_divisor divisor;
|
||||
unsigned long driver_data;
|
||||
};
|
||||
|
||||
struct vlynq_regs;
|
||||
struct vlynq_device {
|
||||
u32 id, dev_id;
|
||||
int local_irq;
|
||||
int remote_irq;
|
||||
enum vlynq_divisor divisor;
|
||||
u32 regs_start, regs_end;
|
||||
u32 mem_start, mem_end;
|
||||
u32 irq_start, irq_end;
|
||||
int irq;
|
||||
int enabled;
|
||||
struct vlynq_regs *local;
|
||||
struct vlynq_regs *remote;
|
||||
struct device dev;
|
||||
};
|
||||
|
||||
struct vlynq_driver {
|
||||
char *name;
|
||||
struct vlynq_device_id *id_table;
|
||||
int (*probe)(struct vlynq_device *dev, struct vlynq_device_id *id);
|
||||
void (*remove)(struct vlynq_device *dev);
|
||||
struct device_driver driver;
|
||||
};
|
||||
|
||||
struct plat_vlynq_ops {
|
||||
int (*on)(struct vlynq_device *dev);
|
||||
void (*off)(struct vlynq_device *dev);
|
||||
};
|
||||
|
||||
static inline struct vlynq_driver *to_vlynq_driver(struct device_driver *drv)
|
||||
{
|
||||
return container_of(drv, struct vlynq_driver, driver);
|
||||
}
|
||||
|
||||
static inline struct vlynq_device *to_vlynq_device(struct device *device)
|
||||
{
|
||||
return container_of(device, struct vlynq_device, dev);
|
||||
}
|
||||
|
||||
extern struct bus_type vlynq_bus_type;
|
||||
|
||||
extern int __vlynq_register_driver(struct vlynq_driver *driver,
|
||||
struct module *owner);
|
||||
|
||||
static inline int vlynq_register_driver(struct vlynq_driver *driver)
|
||||
{
|
||||
return __vlynq_register_driver(driver, THIS_MODULE);
|
||||
}
|
||||
|
||||
static inline void *vlynq_get_drvdata(struct vlynq_device *dev)
|
||||
{
|
||||
return dev_get_drvdata(&dev->dev);
|
||||
}
|
||||
|
||||
static inline void vlynq_set_drvdata(struct vlynq_device *dev, void *data)
|
||||
{
|
||||
dev_set_drvdata(&dev->dev, data);
|
||||
}
|
||||
|
||||
static inline u32 vlynq_mem_start(struct vlynq_device *dev)
|
||||
{
|
||||
return dev->mem_start;
|
||||
}
|
||||
|
||||
static inline u32 vlynq_mem_end(struct vlynq_device *dev)
|
||||
{
|
||||
return dev->mem_end;
|
||||
}
|
||||
|
||||
static inline u32 vlynq_mem_len(struct vlynq_device *dev)
|
||||
{
|
||||
return dev->mem_end - dev->mem_start + 1;
|
||||
}
|
||||
|
||||
static inline int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
|
||||
{
|
||||
int irq = dev->irq_start + virq;
|
||||
if ((irq < dev->irq_start) || (irq > dev->irq_end))
|
||||
return -EINVAL;
|
||||
|
||||
return irq;
|
||||
}
|
||||
|
||||
static inline int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
|
||||
{
|
||||
if ((irq < dev->irq_start) || (irq > dev->irq_end))
|
||||
return -EINVAL;
|
||||
|
||||
return irq - dev->irq_start;
|
||||
}
|
||||
|
||||
extern void vlynq_unregister_driver(struct vlynq_driver *driver);
|
||||
extern int vlynq_enable_device(struct vlynq_device *dev);
|
||||
extern void vlynq_disable_device(struct vlynq_device *dev);
|
||||
extern int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
|
||||
struct vlynq_mapping *mapping);
|
||||
extern int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
|
||||
struct vlynq_mapping *mapping);
|
||||
extern int vlynq_set_local_irq(struct vlynq_device *dev, int virq);
|
||||
extern int vlynq_set_remote_irq(struct vlynq_device *dev, int virq);
|
||||
|
||||
#endif /* __VLYNQ_H__ */
|
||||
Loading…
Reference in a new issue