projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 61e115a5 MB |
1 | /* |
| 2 | * Sonics Silicon Backplane | |
| 3 | * PCI Hostdevice wrapper | |
| 4 | * | |
| 5 | * Copyright (c) 2005 Martin Langer <martin-langer@gmx.de> | |
| 6 | * Copyright (c) 2005 Stefano Brivio <st3@riseup.net> | |
| 7 | * Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org> | |
| 8 | * Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch> | |
| eb032b98 | 9 | * Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> |
| 61e115a5 MB |
10 | * |
| 11 | * Licensed under the GNU/GPL. See COPYING for details. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/pci.h> | |
| 5a0e3ad6 | 15 | #include <linux/slab.h> |
| 61e115a5 MB |
16 | #include <linux/ssb/ssb.h> |
| 17 | ||
| 18 | ||
| 19 | #ifdef CONFIG_PM | |
| 20 | static int ssb_pcihost_suspend(struct pci_dev *dev, pm_message_t state) | |
| 21 | { | |
| 8fe2b65a MB |
22 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
| 23 | int err; | |
| 24 | ||
| 25 | err = ssb_bus_suspend(ssb); | |
| 26 | if (err) | |
| 27 | return err; | |
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28 | pci_save_state(dev); |
| 29 | pci_disable_device(dev); | |
| 30 | pci_set_power_state(dev, pci_choose_state(dev, state)); | |
| 31 | ||
| 32 | return 0; | |
| 33 | } | |
| 34 | ||
| 35 | static int ssb_pcihost_resume(struct pci_dev *dev) | |
| 36 | { | |
| 8fe2b65a | 37 | struct ssb_bus *ssb = pci_get_drvdata(dev); |
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38 | int err; |
| 39 | ||
| 40 | pci_set_power_state(dev, 0); | |
| 41 | err = pci_enable_device(dev); | |
| 42 | if (err) | |
| 43 | return err; | |
| 44 | pci_restore_state(dev); | |
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45 | err = ssb_bus_resume(ssb); |
| 46 | if (err) | |
| 47 | return err; | |
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48 | |
| 49 | return 0; | |
| 50 | } | |
| 51 | #else /* CONFIG_PM */ | |
| 52 | # define ssb_pcihost_suspend NULL | |
| 53 | # define ssb_pcihost_resume NULL | |
| 54 | #endif /* CONFIG_PM */ | |
| 55 | ||
| 56 | static int ssb_pcihost_probe(struct pci_dev *dev, | |
| 57 | const struct pci_device_id *id) | |
| 58 | { | |
| 59 | struct ssb_bus *ssb; | |
| 60 | int err = -ENOMEM; | |
| 61 | const char *name; | |
| e081685c | 62 | u32 val; |
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63 | |
| 64 | ssb = kzalloc(sizeof(*ssb), GFP_KERNEL); | |
| 65 | if (!ssb) | |
| 66 | goto out; | |
| 67 | err = pci_enable_device(dev); | |
| 68 | if (err) | |
| 69 | goto err_kfree_ssb; | |
| b7b05fe7 | 70 | name = dev_name(&dev->dev); |
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71 | if (dev->driver && dev->driver->name) |
| 72 | name = dev->driver->name; | |
| 73 | err = pci_request_regions(dev, name); | |
| 74 | if (err) | |
| 75 | goto err_pci_disable; | |
| 76 | pci_set_master(dev); | |
| 77 | ||
| e081685c LF |
78 | /* Disable the RETRY_TIMEOUT register (0x41) to keep |
| 79 | * PCI Tx retries from interfering with C3 CPU state */ | |
| 80 | pci_read_config_dword(dev, 0x40, &val); | |
| 81 | if ((val & 0x0000ff00) != 0) | |
| 82 | pci_write_config_dword(dev, 0x40, val & 0xffff00ff); | |
| 83 | ||
| 61e115a5 MB |
84 | err = ssb_bus_pcibus_register(ssb, dev); |
| 85 | if (err) | |
| 86 | goto err_pci_release_regions; | |
| 87 | ||
| 88 | pci_set_drvdata(dev, ssb); | |
| 89 | ||
| 90 | out: | |
| 91 | return err; | |
| 92 | ||
| 93 | err_pci_release_regions: | |
| 94 | pci_release_regions(dev); | |
| 95 | err_pci_disable: | |
| 96 | pci_disable_device(dev); | |
| 97 | err_kfree_ssb: | |
| 98 | kfree(ssb); | |
| 99 | return err; | |
| 100 | } | |
| 101 | ||
| 102 | static void ssb_pcihost_remove(struct pci_dev *dev) | |
| 103 | { | |
| 104 | struct ssb_bus *ssb = pci_get_drvdata(dev); | |
| 105 | ||
| 106 | ssb_bus_unregister(ssb); | |
| 107 | pci_release_regions(dev); | |
| 108 | pci_disable_device(dev); | |
| 109 | kfree(ssb); | |
| 110 | pci_set_drvdata(dev, NULL); | |
| 111 | } | |
| 112 | ||
| 113 | int ssb_pcihost_register(struct pci_driver *driver) | |
| 114 | { | |
| 115 | driver->probe = ssb_pcihost_probe; | |
| 116 | driver->remove = ssb_pcihost_remove; | |
| 117 | driver->suspend = ssb_pcihost_suspend; | |
| 118 | driver->resume = ssb_pcihost_resume; | |
| 119 | ||
| 120 | return pci_register_driver(driver); | |
| 121 | } | |
| 122 | EXPORT_SYMBOL(ssb_pcihost_register); |