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