| Simon Glass | 457df23 | 2019-12-06 21:41:40 -0700 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * (C) Copyright 2009 |
| 4 | * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com. |
| 5 | * Copyright 2019 Google Inc |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <dm.h> |
| 10 | #include "designware_i2c.h" |
| 11 | |
| 12 | /* BayTrail HCNT/LCNT/SDA hold time */ |
| 13 | static struct dw_scl_sda_cfg byt_config = { |
| 14 | .ss_hcnt = 0x200, |
| 15 | .fs_hcnt = 0x55, |
| 16 | .ss_lcnt = 0x200, |
| 17 | .fs_lcnt = 0x99, |
| 18 | .sda_hold = 0x6, |
| 19 | }; |
| 20 | |
| 21 | static int designware_i2c_pci_probe(struct udevice *dev) |
| 22 | { |
| 23 | struct dw_i2c *priv = dev_get_priv(dev); |
| 24 | |
| 25 | /* Save base address from PCI BAR */ |
| 26 | priv->regs = (struct i2c_regs *) |
| 27 | dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM); |
| 28 | if (IS_ENABLED(CONFIG_INTEL_BAYTRAIL)) |
| 29 | /* Use BayTrail specific timing values */ |
| 30 | priv->scl_sda_cfg = &byt_config; |
| 31 | |
| 32 | return designware_i2c_probe(dev); |
| 33 | } |
| 34 | |
| 35 | static int designware_i2c_pci_bind(struct udevice *dev) |
| 36 | { |
| 37 | static int num_cards; |
| 38 | char name[20]; |
| 39 | |
| 40 | /* |
| 41 | * Create a unique device name for PCI type devices |
| 42 | * ToDo: |
| 43 | * Setting req_seq in the driver is probably not recommended. |
| 44 | * But without a DT alias the number is not configured. And |
| 45 | * using this driver is impossible for PCIe I2C devices. |
| 46 | * This can be removed, once a better (correct) way for this |
| 47 | * is found and implemented. |
| 48 | */ |
| 49 | dev->req_seq = num_cards; |
| 50 | sprintf(name, "i2c_designware#%u", num_cards++); |
| 51 | device_set_name(dev, name); |
| 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | U_BOOT_DRIVER(i2c_designware_pci) = { |
| 57 | .name = "i2c_designware_pci", |
| 58 | .id = UCLASS_I2C, |
| 59 | .bind = designware_i2c_pci_bind, |
| 60 | .probe = designware_i2c_pci_probe, |
| 61 | .priv_auto_alloc_size = sizeof(struct dw_i2c), |
| 62 | .remove = designware_i2c_remove, |
| 63 | .flags = DM_FLAG_OS_PREPARE, |
| 64 | .ops = &designware_i2c_ops, |
| 65 | }; |
| 66 | |
| 67 | static struct pci_device_id designware_pci_supported[] = { |
| 68 | /* Intel BayTrail has 7 I2C controller located on the PCI bus */ |
| 69 | { PCI_VDEVICE(INTEL, 0x0f41) }, |
| 70 | { PCI_VDEVICE(INTEL, 0x0f42) }, |
| 71 | { PCI_VDEVICE(INTEL, 0x0f43) }, |
| 72 | { PCI_VDEVICE(INTEL, 0x0f44) }, |
| 73 | { PCI_VDEVICE(INTEL, 0x0f45) }, |
| 74 | { PCI_VDEVICE(INTEL, 0x0f46) }, |
| 75 | { PCI_VDEVICE(INTEL, 0x0f47) }, |
| 76 | {}, |
| 77 | }; |
| 78 | |
| 79 | U_BOOT_PCI_DEVICE(i2c_designware_pci, designware_pci_supported); |