bus. System Configuration interface is one of the possible means
of generating transactions on this bus.
-config ASPEED_LPC_CTRL
- depends on (ARCH_ASPEED || COMPILE_TEST) && REGMAP && MFD_SYSCON
- tristate "Aspeed ast2400/2500 HOST LPC to BMC bridge control"
- ---help---
- Control Aspeed ast2400/2500 HOST LPC to BMC mappings through
- ioctl()s, the driver also provides a read/write interface to a BMC ram
- region where the host LPC read/write region can be buffered.
-
-config ASPEED_LPC_SNOOP
- tristate "Aspeed ast2500 HOST LPC snoop support"
- depends on (ARCH_ASPEED || COMPILE_TEST) && REGMAP && MFD_SYSCON
- help
- Provides a driver to control the LPC snoop interface which
- allows the BMC to listen on and save the data written by
- the host to an arbitrary LPC I/O port.
-
config PCI_ENDPOINT_TEST
depends on PCI
select CRC32
obj-$(CONFIG_ECHO) += echo/
obj-$(CONFIG_VEXPRESS_SYSCFG) += vexpress-syscfg.o
obj-$(CONFIG_CXL_BASE) += cxl/
-obj-$(CONFIG_ASPEED_LPC_CTRL) += aspeed-lpc-ctrl.o
-obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o
obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o
obj-$(CONFIG_OCXL) += ocxl/
obj-y += cardreader/
+++ /dev/null
-/*
- * Copyright 2017 IBM Corporation
- *
- * 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.
- */
-
-#include <linux/clk.h>
-#include <linux/mfd/syscon.h>
-#include <linux/miscdevice.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/platform_device.h>
-#include <linux/poll.h>
-#include <linux/regmap.h>
-
-#include <linux/aspeed-lpc-ctrl.h>
-
-#define DEVICE_NAME "aspeed-lpc-ctrl"
-
-#define HICR5 0x0
-#define HICR5_ENL2H BIT(8)
-#define HICR5_ENFWH BIT(10)
-
-#define HICR7 0x8
-#define HICR8 0xc
-
-struct aspeed_lpc_ctrl {
- struct miscdevice miscdev;
- struct regmap *regmap;
- struct clk *clk;
- phys_addr_t mem_base;
- resource_size_t mem_size;
- u32 pnor_size;
- u32 pnor_base;
-};
-
-static struct aspeed_lpc_ctrl *file_aspeed_lpc_ctrl(struct file *file)
-{
- return container_of(file->private_data, struct aspeed_lpc_ctrl,
- miscdev);
-}
-
-static int aspeed_lpc_ctrl_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct aspeed_lpc_ctrl *lpc_ctrl = file_aspeed_lpc_ctrl(file);
- unsigned long vsize = vma->vm_end - vma->vm_start;
- pgprot_t prot = vma->vm_page_prot;
-
- if (vma->vm_pgoff + vsize > lpc_ctrl->mem_base + lpc_ctrl->mem_size)
- return -EINVAL;
-
- /* ast2400/2500 AHB accesses are not cache coherent */
- prot = pgprot_noncached(prot);
-
- if (remap_pfn_range(vma, vma->vm_start,
- (lpc_ctrl->mem_base >> PAGE_SHIFT) + vma->vm_pgoff,
- vsize, prot))
- return -EAGAIN;
-
- return 0;
-}
-
-static long aspeed_lpc_ctrl_ioctl(struct file *file, unsigned int cmd,
- unsigned long param)
-{
- struct aspeed_lpc_ctrl *lpc_ctrl = file_aspeed_lpc_ctrl(file);
- void __user *p = (void __user *)param;
- struct aspeed_lpc_ctrl_mapping map;
- u32 addr;
- u32 size;
- long rc;
-
- if (copy_from_user(&map, p, sizeof(map)))
- return -EFAULT;
-
- if (map.flags != 0)
- return -EINVAL;
-
- switch (cmd) {
- case ASPEED_LPC_CTRL_IOCTL_GET_SIZE:
- /* The flash windows don't report their size */
- if (map.window_type != ASPEED_LPC_CTRL_WINDOW_MEMORY)
- return -EINVAL;
-
- /* Support more than one window id in the future */
- if (map.window_id != 0)
- return -EINVAL;
-
- map.size = lpc_ctrl->mem_size;
-
- return copy_to_user(p, &map, sizeof(map)) ? -EFAULT : 0;
- case ASPEED_LPC_CTRL_IOCTL_MAP:
-
- /*
- * The top half of HICR7 is the MSB of the BMC address of the
- * mapping.
- * The bottom half of HICR7 is the MSB of the HOST LPC
- * firmware space address of the mapping.
- *
- * The 1 bits in the top of half of HICR8 represent the bits
- * (in the requested address) that should be ignored and
- * replaced with those from the top half of HICR7.
- * The 1 bits in the bottom half of HICR8 represent the bits
- * (in the requested address) that should be kept and pass
- * into the BMC address space.
- */
-
- /*
- * It doesn't make sense to talk about a size or offset with
- * low 16 bits set. Both HICR7 and HICR8 talk about the top 16
- * bits of addresses and sizes.
- */
-
- if ((map.size & 0x0000ffff) || (map.offset & 0x0000ffff))
- return -EINVAL;
-
- /*
- * Because of the way the masks work in HICR8 offset has to
- * be a multiple of size.
- */
- if (map.offset & (map.size - 1))
- return -EINVAL;
-
- if (map.window_type == ASPEED_LPC_CTRL_WINDOW_FLASH) {
- addr = lpc_ctrl->pnor_base;
- size = lpc_ctrl->pnor_size;
- } else if (map.window_type == ASPEED_LPC_CTRL_WINDOW_MEMORY) {
- addr = lpc_ctrl->mem_base;
- size = lpc_ctrl->mem_size;
- } else {
- return -EINVAL;
- }
-
- /* Check overflow first! */
- if (map.offset + map.size < map.offset ||
- map.offset + map.size > size)
- return -EINVAL;
-
- if (map.size == 0 || map.size > size)
- return -EINVAL;
-
- addr += map.offset;
-
- /*
- * addr (host lpc address) is safe regardless of values. This
- * simply changes the address the host has to request on its
- * side of the LPC bus. This cannot impact the hosts own
- * memory space by surprise as LPC specific accessors are
- * required. The only strange thing that could be done is
- * setting the lower 16 bits but the shift takes care of that.
- */
-
- rc = regmap_write(lpc_ctrl->regmap, HICR7,
- (addr | (map.addr >> 16)));
- if (rc)
- return rc;
-
- rc = regmap_write(lpc_ctrl->regmap, HICR8,
- (~(map.size - 1)) | ((map.size >> 16) - 1));
- if (rc)
- return rc;
-
- /*
- * Enable LPC FHW cycles. This is required for the host to
- * access the regions specified.
- */
- return regmap_update_bits(lpc_ctrl->regmap, HICR5,
- HICR5_ENFWH | HICR5_ENL2H,
- HICR5_ENFWH | HICR5_ENL2H);
- }
-
- return -EINVAL;
-}
-
-static const struct file_operations aspeed_lpc_ctrl_fops = {
- .owner = THIS_MODULE,
- .mmap = aspeed_lpc_ctrl_mmap,
- .unlocked_ioctl = aspeed_lpc_ctrl_ioctl,
-};
-
-static int aspeed_lpc_ctrl_probe(struct platform_device *pdev)
-{
- struct aspeed_lpc_ctrl *lpc_ctrl;
- struct device_node *node;
- struct resource resm;
- struct device *dev;
- int rc;
-
- dev = &pdev->dev;
-
- lpc_ctrl = devm_kzalloc(dev, sizeof(*lpc_ctrl), GFP_KERNEL);
- if (!lpc_ctrl)
- return -ENOMEM;
-
- node = of_parse_phandle(dev->of_node, "flash", 0);
- if (!node) {
- dev_err(dev, "Didn't find host pnor flash node\n");
- return -ENODEV;
- }
-
- rc = of_address_to_resource(node, 1, &resm);
- of_node_put(node);
- if (rc) {
- dev_err(dev, "Couldn't address to resource for flash\n");
- return rc;
- }
-
- lpc_ctrl->pnor_size = resource_size(&resm);
- lpc_ctrl->pnor_base = resm.start;
-
- dev_set_drvdata(&pdev->dev, lpc_ctrl);
-
- node = of_parse_phandle(dev->of_node, "memory-region", 0);
- if (!node) {
- dev_err(dev, "Didn't find reserved memory\n");
- return -EINVAL;
- }
-
- rc = of_address_to_resource(node, 0, &resm);
- of_node_put(node);
- if (rc) {
- dev_err(dev, "Couldn't address to resource for reserved memory\n");
- return -ENOMEM;
- }
-
- lpc_ctrl->mem_size = resource_size(&resm);
- lpc_ctrl->mem_base = resm.start;
-
- lpc_ctrl->regmap = syscon_node_to_regmap(
- pdev->dev.parent->of_node);
- if (IS_ERR(lpc_ctrl->regmap)) {
- dev_err(dev, "Couldn't get regmap\n");
- return -ENODEV;
- }
-
- lpc_ctrl->clk = devm_clk_get(dev, NULL);
- if (IS_ERR(lpc_ctrl->clk)) {
- dev_err(dev, "couldn't get clock\n");
- return PTR_ERR(lpc_ctrl->clk);
- }
- rc = clk_prepare_enable(lpc_ctrl->clk);
- if (rc) {
- dev_err(dev, "couldn't enable clock\n");
- return rc;
- }
-
- lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR;
- lpc_ctrl->miscdev.name = DEVICE_NAME;
- lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops;
- lpc_ctrl->miscdev.parent = dev;
- rc = misc_register(&lpc_ctrl->miscdev);
- if (rc) {
- dev_err(dev, "Unable to register device\n");
- goto err;
- }
-
- dev_info(dev, "Loaded at %pr\n", &resm);
-
- return 0;
-
-err:
- clk_disable_unprepare(lpc_ctrl->clk);
- return rc;
-}
-
-static int aspeed_lpc_ctrl_remove(struct platform_device *pdev)
-{
- struct aspeed_lpc_ctrl *lpc_ctrl = dev_get_drvdata(&pdev->dev);
-
- misc_deregister(&lpc_ctrl->miscdev);
- clk_disable_unprepare(lpc_ctrl->clk);
-
- return 0;
-}
-
-static const struct of_device_id aspeed_lpc_ctrl_match[] = {
- { .compatible = "aspeed,ast2400-lpc-ctrl" },
- { .compatible = "aspeed,ast2500-lpc-ctrl" },
- { },
-};
-
-static struct platform_driver aspeed_lpc_ctrl_driver = {
- .driver = {
- .name = DEVICE_NAME,
- .of_match_table = aspeed_lpc_ctrl_match,
- },
- .probe = aspeed_lpc_ctrl_probe,
- .remove = aspeed_lpc_ctrl_remove,
-};
-
-module_platform_driver(aspeed_lpc_ctrl_driver);
-
-MODULE_DEVICE_TABLE(of, aspeed_lpc_ctrl_match);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Cyril Bur <cyrilbur@gmail.com>");
-MODULE_DESCRIPTION("Control for aspeed 2400/2500 LPC HOST to BMC mappings");
+++ /dev/null
-/*
- * Copyright 2017 Google Inc
- *
- * 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.
- *
- * Provides a simple driver to control the ASPEED LPC snoop interface which
- * allows the BMC to listen on and save the data written by
- * the host to an arbitrary LPC I/O port.
- *
- * Typically used by the BMC to "watch" host boot progress via port
- * 0x80 writes made by the BIOS during the boot process.
- */
-
-#include <linux/bitops.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/kfifo.h>
-#include <linux/mfd/syscon.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/poll.h>
-#include <linux/regmap.h>
-
-#define DEVICE_NAME "aspeed-lpc-snoop"
-
-#define NUM_SNOOP_CHANNELS 2
-#define SNOOP_FIFO_SIZE 2048
-
-#define HICR5 0x0
-#define HICR5_EN_SNP0W BIT(0)
-#define HICR5_ENINT_SNP0W BIT(1)
-#define HICR5_EN_SNP1W BIT(2)
-#define HICR5_ENINT_SNP1W BIT(3)
-
-#define HICR6 0x4
-#define HICR6_STR_SNP0W BIT(0)
-#define HICR6_STR_SNP1W BIT(1)
-#define SNPWADR 0x10
-#define SNPWADR_CH0_MASK GENMASK(15, 0)
-#define SNPWADR_CH0_SHIFT 0
-#define SNPWADR_CH1_MASK GENMASK(31, 16)
-#define SNPWADR_CH1_SHIFT 16
-#define SNPWDR 0x14
-#define SNPWDR_CH0_MASK GENMASK(7, 0)
-#define SNPWDR_CH0_SHIFT 0
-#define SNPWDR_CH1_MASK GENMASK(15, 8)
-#define SNPWDR_CH1_SHIFT 8
-#define HICRB 0x80
-#define HICRB_ENSNP0D BIT(14)
-#define HICRB_ENSNP1D BIT(15)
-
-struct aspeed_lpc_snoop_model_data {
- /* The ast2400 has bits 14 and 15 as reserved, whereas the ast2500
- * can use them.
- */
- unsigned int has_hicrb_ensnp;
-};
-
-struct aspeed_lpc_snoop_channel {
- struct kfifo fifo;
- wait_queue_head_t wq;
- struct miscdevice miscdev;
-};
-
-struct aspeed_lpc_snoop {
- struct regmap *regmap;
- int irq;
- struct aspeed_lpc_snoop_channel chan[NUM_SNOOP_CHANNELS];
-};
-
-static struct aspeed_lpc_snoop_channel *snoop_file_to_chan(struct file *file)
-{
- return container_of(file->private_data,
- struct aspeed_lpc_snoop_channel,
- miscdev);
-}
-
-static ssize_t snoop_file_read(struct file *file, char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct aspeed_lpc_snoop_channel *chan = snoop_file_to_chan(file);
- unsigned int copied;
- int ret = 0;
-
- if (kfifo_is_empty(&chan->fifo)) {
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
- ret = wait_event_interruptible(chan->wq,
- !kfifo_is_empty(&chan->fifo));
- if (ret == -ERESTARTSYS)
- return -EINTR;
- }
- ret = kfifo_to_user(&chan->fifo, buffer, count, &copied);
-
- return ret ? ret : copied;
-}
-
-static unsigned int snoop_file_poll(struct file *file,
- struct poll_table_struct *pt)
-{
- struct aspeed_lpc_snoop_channel *chan = snoop_file_to_chan(file);
-
- poll_wait(file, &chan->wq, pt);
- return !kfifo_is_empty(&chan->fifo) ? POLLIN : 0;
-}
-
-static const struct file_operations snoop_fops = {
- .owner = THIS_MODULE,
- .read = snoop_file_read,
- .poll = snoop_file_poll,
- .llseek = noop_llseek,
-};
-
-/* Save a byte to a FIFO and discard the oldest byte if FIFO is full */
-static void put_fifo_with_discard(struct aspeed_lpc_snoop_channel *chan, u8 val)
-{
- if (!kfifo_initialized(&chan->fifo))
- return;
- if (kfifo_is_full(&chan->fifo))
- kfifo_skip(&chan->fifo);
- kfifo_put(&chan->fifo, val);
- wake_up_interruptible(&chan->wq);
-}
-
-static irqreturn_t aspeed_lpc_snoop_irq(int irq, void *arg)
-{
- struct aspeed_lpc_snoop *lpc_snoop = arg;
- u32 reg, data;
-
- if (regmap_read(lpc_snoop->regmap, HICR6, ®))
- return IRQ_NONE;
-
- /* Check if one of the snoop channels is interrupting */
- reg &= (HICR6_STR_SNP0W | HICR6_STR_SNP1W);
- if (!reg)
- return IRQ_NONE;
-
- /* Ack pending IRQs */
- regmap_write(lpc_snoop->regmap, HICR6, reg);
-
- /* Read and save most recent snoop'ed data byte to FIFO */
- regmap_read(lpc_snoop->regmap, SNPWDR, &data);
-
- if (reg & HICR6_STR_SNP0W) {
- u8 val = (data & SNPWDR_CH0_MASK) >> SNPWDR_CH0_SHIFT;
-
- put_fifo_with_discard(&lpc_snoop->chan[0], val);
- }
- if (reg & HICR6_STR_SNP1W) {
- u8 val = (data & SNPWDR_CH1_MASK) >> SNPWDR_CH1_SHIFT;
-
- put_fifo_with_discard(&lpc_snoop->chan[1], val);
- }
-
- return IRQ_HANDLED;
-}
-
-static int aspeed_lpc_snoop_config_irq(struct aspeed_lpc_snoop *lpc_snoop,
- struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- int rc;
-
- lpc_snoop->irq = platform_get_irq(pdev, 0);
- if (!lpc_snoop->irq)
- return -ENODEV;
-
- rc = devm_request_irq(dev, lpc_snoop->irq,
- aspeed_lpc_snoop_irq, IRQF_SHARED,
- DEVICE_NAME, lpc_snoop);
- if (rc < 0) {
- dev_warn(dev, "Unable to request IRQ %d\n", lpc_snoop->irq);
- lpc_snoop->irq = 0;
- return rc;
- }
-
- return 0;
-}
-
-static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop,
- struct device *dev,
- int channel, u16 lpc_port)
-{
- int rc = 0;
- u32 hicr5_en, snpwadr_mask, snpwadr_shift, hicrb_en;
- const struct aspeed_lpc_snoop_model_data *model_data =
- of_device_get_match_data(dev);
-
- init_waitqueue_head(&lpc_snoop->chan[channel].wq);
- /* Create FIFO datastructure */
- rc = kfifo_alloc(&lpc_snoop->chan[channel].fifo,
- SNOOP_FIFO_SIZE, GFP_KERNEL);
- if (rc)
- return rc;
-
- lpc_snoop->chan[channel].miscdev.minor = MISC_DYNAMIC_MINOR;
- lpc_snoop->chan[channel].miscdev.name =
- devm_kasprintf(dev, GFP_KERNEL, "%s%d", DEVICE_NAME, channel);
- lpc_snoop->chan[channel].miscdev.fops = &snoop_fops;
- lpc_snoop->chan[channel].miscdev.parent = dev;
- rc = misc_register(&lpc_snoop->chan[channel].miscdev);
- if (rc)
- return rc;
-
- /* Enable LPC snoop channel at requested port */
- switch (channel) {
- case 0:
- hicr5_en = HICR5_EN_SNP0W | HICR5_ENINT_SNP0W;
- snpwadr_mask = SNPWADR_CH0_MASK;
- snpwadr_shift = SNPWADR_CH0_SHIFT;
- hicrb_en = HICRB_ENSNP0D;
- break;
- case 1:
- hicr5_en = HICR5_EN_SNP1W | HICR5_ENINT_SNP1W;
- snpwadr_mask = SNPWADR_CH1_MASK;
- snpwadr_shift = SNPWADR_CH1_SHIFT;
- hicrb_en = HICRB_ENSNP1D;
- break;
- default:
- return -EINVAL;
- }
-
- regmap_update_bits(lpc_snoop->regmap, HICR5, hicr5_en, hicr5_en);
- regmap_update_bits(lpc_snoop->regmap, SNPWADR, snpwadr_mask,
- lpc_port << snpwadr_shift);
- if (model_data->has_hicrb_ensnp)
- regmap_update_bits(lpc_snoop->regmap, HICRB,
- hicrb_en, hicrb_en);
-
- return rc;
-}
-
-static void aspeed_lpc_disable_snoop(struct aspeed_lpc_snoop *lpc_snoop,
- int channel)
-{
- switch (channel) {
- case 0:
- regmap_update_bits(lpc_snoop->regmap, HICR5,
- HICR5_EN_SNP0W | HICR5_ENINT_SNP0W,
- 0);
- break;
- case 1:
- regmap_update_bits(lpc_snoop->regmap, HICR5,
- HICR5_EN_SNP1W | HICR5_ENINT_SNP1W,
- 0);
- break;
- default:
- return;
- }
-
- kfifo_free(&lpc_snoop->chan[channel].fifo);
- misc_deregister(&lpc_snoop->chan[channel].miscdev);
-}
-
-static int aspeed_lpc_snoop_probe(struct platform_device *pdev)
-{
- struct aspeed_lpc_snoop *lpc_snoop;
- struct device *dev;
- u32 port;
- int rc;
-
- dev = &pdev->dev;
-
- lpc_snoop = devm_kzalloc(dev, sizeof(*lpc_snoop), GFP_KERNEL);
- if (!lpc_snoop)
- return -ENOMEM;
-
- lpc_snoop->regmap = syscon_node_to_regmap(
- pdev->dev.parent->of_node);
- if (IS_ERR(lpc_snoop->regmap)) {
- dev_err(dev, "Couldn't get regmap\n");
- return -ENODEV;
- }
-
- dev_set_drvdata(&pdev->dev, lpc_snoop);
-
- rc = of_property_read_u32_index(dev->of_node, "snoop-ports", 0, &port);
- if (rc) {
- dev_err(dev, "no snoop ports configured\n");
- return -ENODEV;
- }
-
- rc = aspeed_lpc_snoop_config_irq(lpc_snoop, pdev);
- if (rc)
- return rc;
-
- rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 0, port);
- if (rc)
- return rc;
-
- /* Configuration of 2nd snoop channel port is optional */
- if (of_property_read_u32_index(dev->of_node, "snoop-ports",
- 1, &port) == 0) {
- rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 1, port);
- if (rc)
- aspeed_lpc_disable_snoop(lpc_snoop, 0);
- }
-
- return rc;
-}
-
-static int aspeed_lpc_snoop_remove(struct platform_device *pdev)
-{
- struct aspeed_lpc_snoop *lpc_snoop = dev_get_drvdata(&pdev->dev);
-
- /* Disable both snoop channels */
- aspeed_lpc_disable_snoop(lpc_snoop, 0);
- aspeed_lpc_disable_snoop(lpc_snoop, 1);
-
- return 0;
-}
-
-static const struct aspeed_lpc_snoop_model_data ast2400_model_data = {
- .has_hicrb_ensnp = 0,
-};
-
-static const struct aspeed_lpc_snoop_model_data ast2500_model_data = {
- .has_hicrb_ensnp = 1,
-};
-
-static const struct of_device_id aspeed_lpc_snoop_match[] = {
- { .compatible = "aspeed,ast2400-lpc-snoop",
- .data = &ast2400_model_data },
- { .compatible = "aspeed,ast2500-lpc-snoop",
- .data = &ast2500_model_data },
- { },
-};
-
-static struct platform_driver aspeed_lpc_snoop_driver = {
- .driver = {
- .name = DEVICE_NAME,
- .of_match_table = aspeed_lpc_snoop_match,
- },
- .probe = aspeed_lpc_snoop_probe,
- .remove = aspeed_lpc_snoop_remove,
-};
-
-module_platform_driver(aspeed_lpc_snoop_driver);
-
-MODULE_DEVICE_TABLE(of, aspeed_lpc_snoop_match);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Robert Lippert <rlippert@google.com>");
-MODULE_DESCRIPTION("Linux driver to control Aspeed LPC snoop functionality");
source "drivers/soc/actions/Kconfig"
source "drivers/soc/amlogic/Kconfig"
+source "drivers/soc/aspeed/Kconfig"
source "drivers/soc/atmel/Kconfig"
source "drivers/soc/bcm/Kconfig"
source "drivers/soc/fsl/Kconfig"
#
obj-$(CONFIG_ARCH_ACTIONS) += actions/
+obj-$(CONFIG_ARCH_ASPEED) += aspeed/
obj-$(CONFIG_ARCH_AT91) += atmel/
obj-y += bcm/
obj-$(CONFIG_ARCH_DOVE) += dove/
--- /dev/null
+menu "Aspeed SoC drivers"
+
+config ASPEED_LPC_CTRL
+ depends on (ARCH_ASPEED || COMPILE_TEST) && REGMAP && MFD_SYSCON
+ tristate "Aspeed ast2400/2500 HOST LPC to BMC bridge control"
+ ---help---
+ Control Aspeed ast2400/2500 HOST LPC to BMC mappings through
+ ioctl()s, the driver also provides a read/write interface to a BMC ram
+ region where the host LPC read/write region can be buffered.
+
+config ASPEED_LPC_SNOOP
+ tristate "Aspeed ast2500 HOST LPC snoop support"
+ depends on (ARCH_ASPEED || COMPILE_TEST) && REGMAP && MFD_SYSCON
+ help
+ Provides a driver to control the LPC snoop interface which
+ allows the BMC to listen on and save the data written by
+ the host to an arbitrary LPC I/O port.
+
+
--- /dev/null
+obj-$(CONFIG_ASPEED_LPC_CTRL) += aspeed-lpc-ctrl.o
+obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o
--- /dev/null
+/*
+ * Copyright 2017 IBM Corporation
+ *
+ * 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/mfd/syscon.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/regmap.h>
+
+#include <linux/aspeed-lpc-ctrl.h>
+
+#define DEVICE_NAME "aspeed-lpc-ctrl"
+
+#define HICR5 0x0
+#define HICR5_ENL2H BIT(8)
+#define HICR5_ENFWH BIT(10)
+
+#define HICR7 0x8
+#define HICR8 0xc
+
+struct aspeed_lpc_ctrl {
+ struct miscdevice miscdev;
+ struct regmap *regmap;
+ struct clk *clk;
+ phys_addr_t mem_base;
+ resource_size_t mem_size;
+ u32 pnor_size;
+ u32 pnor_base;
+};
+
+static struct aspeed_lpc_ctrl *file_aspeed_lpc_ctrl(struct file *file)
+{
+ return container_of(file->private_data, struct aspeed_lpc_ctrl,
+ miscdev);
+}
+
+static int aspeed_lpc_ctrl_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct aspeed_lpc_ctrl *lpc_ctrl = file_aspeed_lpc_ctrl(file);
+ unsigned long vsize = vma->vm_end - vma->vm_start;
+ pgprot_t prot = vma->vm_page_prot;
+
+ if (vma->vm_pgoff + vsize > lpc_ctrl->mem_base + lpc_ctrl->mem_size)
+ return -EINVAL;
+
+ /* ast2400/2500 AHB accesses are not cache coherent */
+ prot = pgprot_noncached(prot);
+
+ if (remap_pfn_range(vma, vma->vm_start,
+ (lpc_ctrl->mem_base >> PAGE_SHIFT) + vma->vm_pgoff,
+ vsize, prot))
+ return -EAGAIN;
+
+ return 0;
+}
+
+static long aspeed_lpc_ctrl_ioctl(struct file *file, unsigned int cmd,
+ unsigned long param)
+{
+ struct aspeed_lpc_ctrl *lpc_ctrl = file_aspeed_lpc_ctrl(file);
+ void __user *p = (void __user *)param;
+ struct aspeed_lpc_ctrl_mapping map;
+ u32 addr;
+ u32 size;
+ long rc;
+
+ if (copy_from_user(&map, p, sizeof(map)))
+ return -EFAULT;
+
+ if (map.flags != 0)
+ return -EINVAL;
+
+ switch (cmd) {
+ case ASPEED_LPC_CTRL_IOCTL_GET_SIZE:
+ /* The flash windows don't report their size */
+ if (map.window_type != ASPEED_LPC_CTRL_WINDOW_MEMORY)
+ return -EINVAL;
+
+ /* Support more than one window id in the future */
+ if (map.window_id != 0)
+ return -EINVAL;
+
+ map.size = lpc_ctrl->mem_size;
+
+ return copy_to_user(p, &map, sizeof(map)) ? -EFAULT : 0;
+ case ASPEED_LPC_CTRL_IOCTL_MAP:
+
+ /*
+ * The top half of HICR7 is the MSB of the BMC address of the
+ * mapping.
+ * The bottom half of HICR7 is the MSB of the HOST LPC
+ * firmware space address of the mapping.
+ *
+ * The 1 bits in the top of half of HICR8 represent the bits
+ * (in the requested address) that should be ignored and
+ * replaced with those from the top half of HICR7.
+ * The 1 bits in the bottom half of HICR8 represent the bits
+ * (in the requested address) that should be kept and pass
+ * into the BMC address space.
+ */
+
+ /*
+ * It doesn't make sense to talk about a size or offset with
+ * low 16 bits set. Both HICR7 and HICR8 talk about the top 16
+ * bits of addresses and sizes.
+ */
+
+ if ((map.size & 0x0000ffff) || (map.offset & 0x0000ffff))
+ return -EINVAL;
+
+ /*
+ * Because of the way the masks work in HICR8 offset has to
+ * be a multiple of size.
+ */
+ if (map.offset & (map.size - 1))
+ return -EINVAL;
+
+ if (map.window_type == ASPEED_LPC_CTRL_WINDOW_FLASH) {
+ addr = lpc_ctrl->pnor_base;
+ size = lpc_ctrl->pnor_size;
+ } else if (map.window_type == ASPEED_LPC_CTRL_WINDOW_MEMORY) {
+ addr = lpc_ctrl->mem_base;
+ size = lpc_ctrl->mem_size;
+ } else {
+ return -EINVAL;
+ }
+
+ /* Check overflow first! */
+ if (map.offset + map.size < map.offset ||
+ map.offset + map.size > size)
+ return -EINVAL;
+
+ if (map.size == 0 || map.size > size)
+ return -EINVAL;
+
+ addr += map.offset;
+
+ /*
+ * addr (host lpc address) is safe regardless of values. This
+ * simply changes the address the host has to request on its
+ * side of the LPC bus. This cannot impact the hosts own
+ * memory space by surprise as LPC specific accessors are
+ * required. The only strange thing that could be done is
+ * setting the lower 16 bits but the shift takes care of that.
+ */
+
+ rc = regmap_write(lpc_ctrl->regmap, HICR7,
+ (addr | (map.addr >> 16)));
+ if (rc)
+ return rc;
+
+ rc = regmap_write(lpc_ctrl->regmap, HICR8,
+ (~(map.size - 1)) | ((map.size >> 16) - 1));
+ if (rc)
+ return rc;
+
+ /*
+ * Enable LPC FHW cycles. This is required for the host to
+ * access the regions specified.
+ */
+ return regmap_update_bits(lpc_ctrl->regmap, HICR5,
+ HICR5_ENFWH | HICR5_ENL2H,
+ HICR5_ENFWH | HICR5_ENL2H);
+ }
+
+ return -EINVAL;
+}
+
+static const struct file_operations aspeed_lpc_ctrl_fops = {
+ .owner = THIS_MODULE,
+ .mmap = aspeed_lpc_ctrl_mmap,
+ .unlocked_ioctl = aspeed_lpc_ctrl_ioctl,
+};
+
+static int aspeed_lpc_ctrl_probe(struct platform_device *pdev)
+{
+ struct aspeed_lpc_ctrl *lpc_ctrl;
+ struct device_node *node;
+ struct resource resm;
+ struct device *dev;
+ int rc;
+
+ dev = &pdev->dev;
+
+ lpc_ctrl = devm_kzalloc(dev, sizeof(*lpc_ctrl), GFP_KERNEL);
+ if (!lpc_ctrl)
+ return -ENOMEM;
+
+ node = of_parse_phandle(dev->of_node, "flash", 0);
+ if (!node) {
+ dev_err(dev, "Didn't find host pnor flash node\n");
+ return -ENODEV;
+ }
+
+ rc = of_address_to_resource(node, 1, &resm);
+ of_node_put(node);
+ if (rc) {
+ dev_err(dev, "Couldn't address to resource for flash\n");
+ return rc;
+ }
+
+ lpc_ctrl->pnor_size = resource_size(&resm);
+ lpc_ctrl->pnor_base = resm.start;
+
+ dev_set_drvdata(&pdev->dev, lpc_ctrl);
+
+ node = of_parse_phandle(dev->of_node, "memory-region", 0);
+ if (!node) {
+ dev_err(dev, "Didn't find reserved memory\n");
+ return -EINVAL;
+ }
+
+ rc = of_address_to_resource(node, 0, &resm);
+ of_node_put(node);
+ if (rc) {
+ dev_err(dev, "Couldn't address to resource for reserved memory\n");
+ return -ENOMEM;
+ }
+
+ lpc_ctrl->mem_size = resource_size(&resm);
+ lpc_ctrl->mem_base = resm.start;
+
+ lpc_ctrl->regmap = syscon_node_to_regmap(
+ pdev->dev.parent->of_node);
+ if (IS_ERR(lpc_ctrl->regmap)) {
+ dev_err(dev, "Couldn't get regmap\n");
+ return -ENODEV;
+ }
+
+ lpc_ctrl->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(lpc_ctrl->clk)) {
+ dev_err(dev, "couldn't get clock\n");
+ return PTR_ERR(lpc_ctrl->clk);
+ }
+ rc = clk_prepare_enable(lpc_ctrl->clk);
+ if (rc) {
+ dev_err(dev, "couldn't enable clock\n");
+ return rc;
+ }
+
+ lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR;
+ lpc_ctrl->miscdev.name = DEVICE_NAME;
+ lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops;
+ lpc_ctrl->miscdev.parent = dev;
+ rc = misc_register(&lpc_ctrl->miscdev);
+ if (rc) {
+ dev_err(dev, "Unable to register device\n");
+ goto err;
+ }
+
+ dev_info(dev, "Loaded at %pr\n", &resm);
+
+ return 0;
+
+err:
+ clk_disable_unprepare(lpc_ctrl->clk);
+ return rc;
+}
+
+static int aspeed_lpc_ctrl_remove(struct platform_device *pdev)
+{
+ struct aspeed_lpc_ctrl *lpc_ctrl = dev_get_drvdata(&pdev->dev);
+
+ misc_deregister(&lpc_ctrl->miscdev);
+ clk_disable_unprepare(lpc_ctrl->clk);
+
+ return 0;
+}
+
+static const struct of_device_id aspeed_lpc_ctrl_match[] = {
+ { .compatible = "aspeed,ast2400-lpc-ctrl" },
+ { .compatible = "aspeed,ast2500-lpc-ctrl" },
+ { },
+};
+
+static struct platform_driver aspeed_lpc_ctrl_driver = {
+ .driver = {
+ .name = DEVICE_NAME,
+ .of_match_table = aspeed_lpc_ctrl_match,
+ },
+ .probe = aspeed_lpc_ctrl_probe,
+ .remove = aspeed_lpc_ctrl_remove,
+};
+
+module_platform_driver(aspeed_lpc_ctrl_driver);
+
+MODULE_DEVICE_TABLE(of, aspeed_lpc_ctrl_match);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cyril Bur <cyrilbur@gmail.com>");
+MODULE_DESCRIPTION("Control for aspeed 2400/2500 LPC HOST to BMC mappings");
--- /dev/null
+/*
+ * Copyright 2017 Google Inc
+ *
+ * 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.
+ *
+ * Provides a simple driver to control the ASPEED LPC snoop interface which
+ * allows the BMC to listen on and save the data written by
+ * the host to an arbitrary LPC I/O port.
+ *
+ * Typically used by the BMC to "watch" host boot progress via port
+ * 0x80 writes made by the BIOS during the boot process.
+ */
+
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/kfifo.h>
+#include <linux/mfd/syscon.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/regmap.h>
+
+#define DEVICE_NAME "aspeed-lpc-snoop"
+
+#define NUM_SNOOP_CHANNELS 2
+#define SNOOP_FIFO_SIZE 2048
+
+#define HICR5 0x0
+#define HICR5_EN_SNP0W BIT(0)
+#define HICR5_ENINT_SNP0W BIT(1)
+#define HICR5_EN_SNP1W BIT(2)
+#define HICR5_ENINT_SNP1W BIT(3)
+
+#define HICR6 0x4
+#define HICR6_STR_SNP0W BIT(0)
+#define HICR6_STR_SNP1W BIT(1)
+#define SNPWADR 0x10
+#define SNPWADR_CH0_MASK GENMASK(15, 0)
+#define SNPWADR_CH0_SHIFT 0
+#define SNPWADR_CH1_MASK GENMASK(31, 16)
+#define SNPWADR_CH1_SHIFT 16
+#define SNPWDR 0x14
+#define SNPWDR_CH0_MASK GENMASK(7, 0)
+#define SNPWDR_CH0_SHIFT 0
+#define SNPWDR_CH1_MASK GENMASK(15, 8)
+#define SNPWDR_CH1_SHIFT 8
+#define HICRB 0x80
+#define HICRB_ENSNP0D BIT(14)
+#define HICRB_ENSNP1D BIT(15)
+
+struct aspeed_lpc_snoop_model_data {
+ /* The ast2400 has bits 14 and 15 as reserved, whereas the ast2500
+ * can use them.
+ */
+ unsigned int has_hicrb_ensnp;
+};
+
+struct aspeed_lpc_snoop_channel {
+ struct kfifo fifo;
+ wait_queue_head_t wq;
+ struct miscdevice miscdev;
+};
+
+struct aspeed_lpc_snoop {
+ struct regmap *regmap;
+ int irq;
+ struct aspeed_lpc_snoop_channel chan[NUM_SNOOP_CHANNELS];
+};
+
+static struct aspeed_lpc_snoop_channel *snoop_file_to_chan(struct file *file)
+{
+ return container_of(file->private_data,
+ struct aspeed_lpc_snoop_channel,
+ miscdev);
+}
+
+static ssize_t snoop_file_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct aspeed_lpc_snoop_channel *chan = snoop_file_to_chan(file);
+ unsigned int copied;
+ int ret = 0;
+
+ if (kfifo_is_empty(&chan->fifo)) {
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ ret = wait_event_interruptible(chan->wq,
+ !kfifo_is_empty(&chan->fifo));
+ if (ret == -ERESTARTSYS)
+ return -EINTR;
+ }
+ ret = kfifo_to_user(&chan->fifo, buffer, count, &copied);
+
+ return ret ? ret : copied;
+}
+
+static unsigned int snoop_file_poll(struct file *file,
+ struct poll_table_struct *pt)
+{
+ struct aspeed_lpc_snoop_channel *chan = snoop_file_to_chan(file);
+
+ poll_wait(file, &chan->wq, pt);
+ return !kfifo_is_empty(&chan->fifo) ? POLLIN : 0;
+}
+
+static const struct file_operations snoop_fops = {
+ .owner = THIS_MODULE,
+ .read = snoop_file_read,
+ .poll = snoop_file_poll,
+ .llseek = noop_llseek,
+};
+
+/* Save a byte to a FIFO and discard the oldest byte if FIFO is full */
+static void put_fifo_with_discard(struct aspeed_lpc_snoop_channel *chan, u8 val)
+{
+ if (!kfifo_initialized(&chan->fifo))
+ return;
+ if (kfifo_is_full(&chan->fifo))
+ kfifo_skip(&chan->fifo);
+ kfifo_put(&chan->fifo, val);
+ wake_up_interruptible(&chan->wq);
+}
+
+static irqreturn_t aspeed_lpc_snoop_irq(int irq, void *arg)
+{
+ struct aspeed_lpc_snoop *lpc_snoop = arg;
+ u32 reg, data;
+
+ if (regmap_read(lpc_snoop->regmap, HICR6, ®))
+ return IRQ_NONE;
+
+ /* Check if one of the snoop channels is interrupting */
+ reg &= (HICR6_STR_SNP0W | HICR6_STR_SNP1W);
+ if (!reg)
+ return IRQ_NONE;
+
+ /* Ack pending IRQs */
+ regmap_write(lpc_snoop->regmap, HICR6, reg);
+
+ /* Read and save most recent snoop'ed data byte to FIFO */
+ regmap_read(lpc_snoop->regmap, SNPWDR, &data);
+
+ if (reg & HICR6_STR_SNP0W) {
+ u8 val = (data & SNPWDR_CH0_MASK) >> SNPWDR_CH0_SHIFT;
+
+ put_fifo_with_discard(&lpc_snoop->chan[0], val);
+ }
+ if (reg & HICR6_STR_SNP1W) {
+ u8 val = (data & SNPWDR_CH1_MASK) >> SNPWDR_CH1_SHIFT;
+
+ put_fifo_with_discard(&lpc_snoop->chan[1], val);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int aspeed_lpc_snoop_config_irq(struct aspeed_lpc_snoop *lpc_snoop,
+ struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int rc;
+
+ lpc_snoop->irq = platform_get_irq(pdev, 0);
+ if (!lpc_snoop->irq)
+ return -ENODEV;
+
+ rc = devm_request_irq(dev, lpc_snoop->irq,
+ aspeed_lpc_snoop_irq, IRQF_SHARED,
+ DEVICE_NAME, lpc_snoop);
+ if (rc < 0) {
+ dev_warn(dev, "Unable to request IRQ %d\n", lpc_snoop->irq);
+ lpc_snoop->irq = 0;
+ return rc;
+ }
+
+ return 0;
+}
+
+static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop,
+ struct device *dev,
+ int channel, u16 lpc_port)
+{
+ int rc = 0;
+ u32 hicr5_en, snpwadr_mask, snpwadr_shift, hicrb_en;
+ const struct aspeed_lpc_snoop_model_data *model_data =
+ of_device_get_match_data(dev);
+
+ init_waitqueue_head(&lpc_snoop->chan[channel].wq);
+ /* Create FIFO datastructure */
+ rc = kfifo_alloc(&lpc_snoop->chan[channel].fifo,
+ SNOOP_FIFO_SIZE, GFP_KERNEL);
+ if (rc)
+ return rc;
+
+ lpc_snoop->chan[channel].miscdev.minor = MISC_DYNAMIC_MINOR;
+ lpc_snoop->chan[channel].miscdev.name =
+ devm_kasprintf(dev, GFP_KERNEL, "%s%d", DEVICE_NAME, channel);
+ lpc_snoop->chan[channel].miscdev.fops = &snoop_fops;
+ lpc_snoop->chan[channel].miscdev.parent = dev;
+ rc = misc_register(&lpc_snoop->chan[channel].miscdev);
+ if (rc)
+ return rc;
+
+ /* Enable LPC snoop channel at requested port */
+ switch (channel) {
+ case 0:
+ hicr5_en = HICR5_EN_SNP0W | HICR5_ENINT_SNP0W;
+ snpwadr_mask = SNPWADR_CH0_MASK;
+ snpwadr_shift = SNPWADR_CH0_SHIFT;
+ hicrb_en = HICRB_ENSNP0D;
+ break;
+ case 1:
+ hicr5_en = HICR5_EN_SNP1W | HICR5_ENINT_SNP1W;
+ snpwadr_mask = SNPWADR_CH1_MASK;
+ snpwadr_shift = SNPWADR_CH1_SHIFT;
+ hicrb_en = HICRB_ENSNP1D;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(lpc_snoop->regmap, HICR5, hicr5_en, hicr5_en);
+ regmap_update_bits(lpc_snoop->regmap, SNPWADR, snpwadr_mask,
+ lpc_port << snpwadr_shift);
+ if (model_data->has_hicrb_ensnp)
+ regmap_update_bits(lpc_snoop->regmap, HICRB,
+ hicrb_en, hicrb_en);
+
+ return rc;
+}
+
+static void aspeed_lpc_disable_snoop(struct aspeed_lpc_snoop *lpc_snoop,
+ int channel)
+{
+ switch (channel) {
+ case 0:
+ regmap_update_bits(lpc_snoop->regmap, HICR5,
+ HICR5_EN_SNP0W | HICR5_ENINT_SNP0W,
+ 0);
+ break;
+ case 1:
+ regmap_update_bits(lpc_snoop->regmap, HICR5,
+ HICR5_EN_SNP1W | HICR5_ENINT_SNP1W,
+ 0);
+ break;
+ default:
+ return;
+ }
+
+ kfifo_free(&lpc_snoop->chan[channel].fifo);
+ misc_deregister(&lpc_snoop->chan[channel].miscdev);
+}
+
+static int aspeed_lpc_snoop_probe(struct platform_device *pdev)
+{
+ struct aspeed_lpc_snoop *lpc_snoop;
+ struct device *dev;
+ u32 port;
+ int rc;
+
+ dev = &pdev->dev;
+
+ lpc_snoop = devm_kzalloc(dev, sizeof(*lpc_snoop), GFP_KERNEL);
+ if (!lpc_snoop)
+ return -ENOMEM;
+
+ lpc_snoop->regmap = syscon_node_to_regmap(
+ pdev->dev.parent->of_node);
+ if (IS_ERR(lpc_snoop->regmap)) {
+ dev_err(dev, "Couldn't get regmap\n");
+ return -ENODEV;
+ }
+
+ dev_set_drvdata(&pdev->dev, lpc_snoop);
+
+ rc = of_property_read_u32_index(dev->of_node, "snoop-ports", 0, &port);
+ if (rc) {
+ dev_err(dev, "no snoop ports configured\n");
+ return -ENODEV;
+ }
+
+ rc = aspeed_lpc_snoop_config_irq(lpc_snoop, pdev);
+ if (rc)
+ return rc;
+
+ rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 0, port);
+ if (rc)
+ return rc;
+
+ /* Configuration of 2nd snoop channel port is optional */
+ if (of_property_read_u32_index(dev->of_node, "snoop-ports",
+ 1, &port) == 0) {
+ rc = aspeed_lpc_enable_snoop(lpc_snoop, dev, 1, port);
+ if (rc)
+ aspeed_lpc_disable_snoop(lpc_snoop, 0);
+ }
+
+ return rc;
+}
+
+static int aspeed_lpc_snoop_remove(struct platform_device *pdev)
+{
+ struct aspeed_lpc_snoop *lpc_snoop = dev_get_drvdata(&pdev->dev);
+
+ /* Disable both snoop channels */
+ aspeed_lpc_disable_snoop(lpc_snoop, 0);
+ aspeed_lpc_disable_snoop(lpc_snoop, 1);
+
+ return 0;
+}
+
+static const struct aspeed_lpc_snoop_model_data ast2400_model_data = {
+ .has_hicrb_ensnp = 0,
+};
+
+static const struct aspeed_lpc_snoop_model_data ast2500_model_data = {
+ .has_hicrb_ensnp = 1,
+};
+
+static const struct of_device_id aspeed_lpc_snoop_match[] = {
+ { .compatible = "aspeed,ast2400-lpc-snoop",
+ .data = &ast2400_model_data },
+ { .compatible = "aspeed,ast2500-lpc-snoop",
+ .data = &ast2500_model_data },
+ { },
+};
+
+static struct platform_driver aspeed_lpc_snoop_driver = {
+ .driver = {
+ .name = DEVICE_NAME,
+ .of_match_table = aspeed_lpc_snoop_match,
+ },
+ .probe = aspeed_lpc_snoop_probe,
+ .remove = aspeed_lpc_snoop_remove,
+};
+
+module_platform_driver(aspeed_lpc_snoop_driver);
+
+MODULE_DEVICE_TABLE(of, aspeed_lpc_snoop_match);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Robert Lippert <rlippert@google.com>");
+MODULE_DESCRIPTION("Linux driver to control Aspeed LPC snoop functionality");
projects / linux.git / commitdiff