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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2009
* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
* Copyright 2019 Google Inc
*/
#include <common.h>
#include <dm.h>
#include "designware_i2c.h"
/* BayTrail HCNT/LCNT/SDA hold time */
static struct dw_scl_sda_cfg byt_config = {
.ss_hcnt = 0x200,
.fs_hcnt = 0x55,
.ss_lcnt = 0x200,
.fs_lcnt = 0x99,
.sda_hold = 0x6,
};
static int designware_i2c_pci_probe(struct udevice *dev)
{
struct dw_i2c *priv = dev_get_priv(dev);
/* Save base address from PCI BAR */
priv->regs = (struct i2c_regs *)
dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
if (IS_ENABLED(CONFIG_INTEL_BAYTRAIL))
/* Use BayTrail specific timing values */
priv->scl_sda_cfg = &byt_config;
return designware_i2c_probe(dev);
}
static int designware_i2c_pci_bind(struct udevice *dev)
{
static int num_cards;
char name[20];
/*
* Create a unique device name for PCI type devices
* ToDo:
* Setting req_seq in the driver is probably not recommended.
* But without a DT alias the number is not configured. And
* using this driver is impossible for PCIe I2C devices.
* This can be removed, once a better (correct) way for this
* is found and implemented.
*/
dev->req_seq = num_cards;
sprintf(name, "i2c_designware#%u", num_cards++);
device_set_name(dev, name);
return 0;
}
U_BOOT_DRIVER(i2c_designware_pci) = {
.name = "i2c_designware_pci",
.id = UCLASS_I2C,
.bind = designware_i2c_pci_bind,
.probe = designware_i2c_pci_probe,
.priv_auto_alloc_size = sizeof(struct dw_i2c),
.remove = designware_i2c_remove,
.flags = DM_FLAG_OS_PREPARE,
.ops = &designware_i2c_ops,
};
static struct pci_device_id designware_pci_supported[] = {
/* Intel BayTrail has 7 I2C controller located on the PCI bus */
{ PCI_VDEVICE(INTEL, 0x0f41) },
{ PCI_VDEVICE(INTEL, 0x0f42) },
{ PCI_VDEVICE(INTEL, 0x0f43) },
{ PCI_VDEVICE(INTEL, 0x0f44) },
{ PCI_VDEVICE(INTEL, 0x0f45) },
{ PCI_VDEVICE(INTEL, 0x0f46) },
{ PCI_VDEVICE(INTEL, 0x0f47) },
{},
};
U_BOOT_PCI_DEVICE(i2c_designware_pci, designware_pci_supported);
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