2 * Universal Flash Storage Host controller PCI glue driver
4 * This code is based on drivers/scsi/ufs/ufshcd-pci.c
5 * Copyright (C) 2011-2013 Samsung India Software Operations
8 * Santosh Yaraganavi <santosh.sy@samsung.com>
9 * Vinayak Holikatti <h.vinayak@samsung.com>
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 * See the COPYING file in the top-level directory or visit
16 * <http://www.gnu.org/licenses/gpl-2.0.html>
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * This program is provided "AS IS" and "WITH ALL FAULTS" and
24 * without warranty of any kind. You are solely responsible for
25 * determining the appropriateness of using and distributing
26 * the program and assume all risks associated with your exercise
27 * of rights with respect to the program, including but not limited
28 * to infringement of third party rights, the risks and costs of
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37 #include <linux/pci.h>
38 #include <linux/pm_runtime.h>
40 static int ufs_intel_disable_lcc(struct ufs_hba *hba)
42 u32 attr = UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE);
45 ufshcd_dme_get(hba, attr, &lcc_enable);
47 ufshcd_dme_set(hba, attr, 0);
52 static int ufs_intel_link_startup_notify(struct ufs_hba *hba,
53 enum ufs_notify_change_status status)
59 err = ufs_intel_disable_lcc(hba);
70 static struct ufs_hba_variant_ops ufs_intel_cnl_hba_vops = {
72 .link_startup_notify = ufs_intel_link_startup_notify,
75 #ifdef CONFIG_PM_SLEEP
77 * ufshcd_pci_suspend - suspend power management function
78 * @pdev: pointer to PCI device handle
81 * Returns 0 if successful
82 * Returns non-zero otherwise
84 static int ufshcd_pci_suspend(struct device *dev)
86 return ufshcd_system_suspend(dev_get_drvdata(dev));
90 * ufshcd_pci_resume - resume power management function
91 * @pdev: pointer to PCI device handle
93 * Returns 0 if successful
94 * Returns non-zero otherwise
96 static int ufshcd_pci_resume(struct device *dev)
98 return ufshcd_system_resume(dev_get_drvdata(dev));
102 * ufshcd_pci_poweroff - suspend-to-disk poweroff function
103 * @dev: pointer to PCI device handle
105 * Returns 0 if successful
106 * Returns non-zero otherwise
108 static int ufshcd_pci_poweroff(struct device *dev)
110 struct ufs_hba *hba = dev_get_drvdata(dev);
111 int spm_lvl = hba->spm_lvl;
115 * For poweroff we need to set the UFS device to PowerDown mode.
116 * Force spm_lvl to ensure that.
119 ret = ufshcd_system_suspend(hba);
120 hba->spm_lvl = spm_lvl;
124 #endif /* !CONFIG_PM_SLEEP */
127 static int ufshcd_pci_runtime_suspend(struct device *dev)
129 return ufshcd_runtime_suspend(dev_get_drvdata(dev));
131 static int ufshcd_pci_runtime_resume(struct device *dev)
133 return ufshcd_runtime_resume(dev_get_drvdata(dev));
135 static int ufshcd_pci_runtime_idle(struct device *dev)
137 return ufshcd_runtime_idle(dev_get_drvdata(dev));
139 #endif /* !CONFIG_PM */
142 * ufshcd_pci_shutdown - main function to put the controller in reset state
143 * @pdev: pointer to PCI device handle
145 static void ufshcd_pci_shutdown(struct pci_dev *pdev)
147 ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
151 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
152 * data structure memory
153 * @pdev - pointer to PCI handle
155 static void ufshcd_pci_remove(struct pci_dev *pdev)
157 struct ufs_hba *hba = pci_get_drvdata(pdev);
159 pm_runtime_forbid(&pdev->dev);
160 pm_runtime_get_noresume(&pdev->dev);
162 ufshcd_dealloc_host(hba);
166 * ufshcd_pci_probe - probe routine of the driver
167 * @pdev: pointer to PCI device handle
170 * Returns 0 on success, non-zero value on failure
173 ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
176 void __iomem *mmio_base;
179 err = pcim_enable_device(pdev);
181 dev_err(&pdev->dev, "pcim_enable_device failed\n");
185 pci_set_master(pdev);
187 err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
189 dev_err(&pdev->dev, "request and iomap failed\n");
193 mmio_base = pcim_iomap_table(pdev)[0];
195 err = ufshcd_alloc_host(&pdev->dev, &hba);
197 dev_err(&pdev->dev, "Allocation failed\n");
201 hba->vops = (struct ufs_hba_variant_ops *)id->driver_data;
203 err = ufshcd_init(hba, mmio_base, pdev->irq);
205 dev_err(&pdev->dev, "Initialization failed\n");
206 ufshcd_dealloc_host(hba);
210 pci_set_drvdata(pdev, hba);
211 pm_runtime_put_noidle(&pdev->dev);
212 pm_runtime_allow(&pdev->dev);
217 static const struct dev_pm_ops ufshcd_pci_pm_ops = {
218 #ifdef CONFIG_PM_SLEEP
219 .suspend = ufshcd_pci_suspend,
220 .resume = ufshcd_pci_resume,
221 .freeze = ufshcd_pci_suspend,
222 .thaw = ufshcd_pci_resume,
223 .poweroff = ufshcd_pci_poweroff,
224 .restore = ufshcd_pci_resume,
226 SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
227 ufshcd_pci_runtime_resume,
228 ufshcd_pci_runtime_idle)
231 static const struct pci_device_id ufshcd_pci_tbl[] = {
232 { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
233 { PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
234 { } /* terminate list */
237 MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
239 static struct pci_driver ufshcd_pci_driver = {
241 .id_table = ufshcd_pci_tbl,
242 .probe = ufshcd_pci_probe,
243 .remove = ufshcd_pci_remove,
244 .shutdown = ufshcd_pci_shutdown,
246 .pm = &ufshcd_pci_pm_ops
250 module_pci_driver(ufshcd_pci_driver);
252 MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
253 MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
254 MODULE_DESCRIPTION("UFS host controller PCI glue driver");
255 MODULE_LICENSE("GPL");
256 MODULE_VERSION(UFSHCD_DRIVER_VERSION);