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 * @dev: pointer to PCI device handle
80 * Returns 0 if successful
81 * Returns non-zero otherwise
83 static int ufshcd_pci_suspend(struct device *dev)
85 return ufshcd_system_suspend(dev_get_drvdata(dev));
89 * ufshcd_pci_resume - resume power management function
90 * @dev: pointer to PCI device handle
92 * Returns 0 if successful
93 * Returns non-zero otherwise
95 static int ufshcd_pci_resume(struct device *dev)
97 return ufshcd_system_resume(dev_get_drvdata(dev));
101 * ufshcd_pci_poweroff - suspend-to-disk poweroff function
102 * @dev: pointer to PCI device handle
104 * Returns 0 if successful
105 * Returns non-zero otherwise
107 static int ufshcd_pci_poweroff(struct device *dev)
109 struct ufs_hba *hba = dev_get_drvdata(dev);
110 int spm_lvl = hba->spm_lvl;
114 * For poweroff we need to set the UFS device to PowerDown mode.
115 * Force spm_lvl to ensure that.
118 ret = ufshcd_system_suspend(hba);
119 hba->spm_lvl = spm_lvl;
123 #endif /* !CONFIG_PM_SLEEP */
126 static int ufshcd_pci_runtime_suspend(struct device *dev)
128 return ufshcd_runtime_suspend(dev_get_drvdata(dev));
130 static int ufshcd_pci_runtime_resume(struct device *dev)
132 return ufshcd_runtime_resume(dev_get_drvdata(dev));
134 static int ufshcd_pci_runtime_idle(struct device *dev)
136 return ufshcd_runtime_idle(dev_get_drvdata(dev));
138 #endif /* !CONFIG_PM */
141 * ufshcd_pci_shutdown - main function to put the controller in reset state
142 * @pdev: pointer to PCI device handle
144 static void ufshcd_pci_shutdown(struct pci_dev *pdev)
146 ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
150 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
151 * data structure memory
152 * @pdev: pointer to PCI handle
154 static void ufshcd_pci_remove(struct pci_dev *pdev)
156 struct ufs_hba *hba = pci_get_drvdata(pdev);
158 pm_runtime_forbid(&pdev->dev);
159 pm_runtime_get_noresume(&pdev->dev);
161 ufshcd_dealloc_host(hba);
165 * ufshcd_pci_probe - probe routine of the driver
166 * @pdev: pointer to PCI device handle
169 * Returns 0 on success, non-zero value on failure
172 ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
175 void __iomem *mmio_base;
178 err = pcim_enable_device(pdev);
180 dev_err(&pdev->dev, "pcim_enable_device failed\n");
184 pci_set_master(pdev);
186 err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
188 dev_err(&pdev->dev, "request and iomap failed\n");
192 mmio_base = pcim_iomap_table(pdev)[0];
194 err = ufshcd_alloc_host(&pdev->dev, &hba);
196 dev_err(&pdev->dev, "Allocation failed\n");
200 hba->vops = (struct ufs_hba_variant_ops *)id->driver_data;
202 err = ufshcd_init(hba, mmio_base, pdev->irq);
204 dev_err(&pdev->dev, "Initialization failed\n");
205 ufshcd_dealloc_host(hba);
209 pci_set_drvdata(pdev, hba);
210 pm_runtime_put_noidle(&pdev->dev);
211 pm_runtime_allow(&pdev->dev);
216 static const struct dev_pm_ops ufshcd_pci_pm_ops = {
217 #ifdef CONFIG_PM_SLEEP
218 .suspend = ufshcd_pci_suspend,
219 .resume = ufshcd_pci_resume,
220 .freeze = ufshcd_pci_suspend,
221 .thaw = ufshcd_pci_resume,
222 .poweroff = ufshcd_pci_poweroff,
223 .restore = ufshcd_pci_resume,
225 SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
226 ufshcd_pci_runtime_resume,
227 ufshcd_pci_runtime_idle)
230 static const struct pci_device_id ufshcd_pci_tbl[] = {
231 { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
232 { PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
233 { PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
234 { PCI_VDEVICE(INTEL, 0x4B43), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
235 { } /* terminate list */
238 MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
240 static struct pci_driver ufshcd_pci_driver = {
242 .id_table = ufshcd_pci_tbl,
243 .probe = ufshcd_pci_probe,
244 .remove = ufshcd_pci_remove,
245 .shutdown = ufshcd_pci_shutdown,
247 .pm = &ufshcd_pci_pm_ops
251 module_pci_driver(ufshcd_pci_driver);
253 MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
254 MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
255 MODULE_DESCRIPTION("UFS host controller PCI glue driver");
256 MODULE_LICENSE("GPL");
257 MODULE_VERSION(UFSHCD_DRIVER_VERSION);