2 * mrst_spi_pci.c - PCI interface driver for DW SPI Core
4 * Copyright (c) 2009, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <linux/interrupt.h>
21 #include <linux/pci.h>
22 #include <linux/spi/dw_spi.h>
23 #include <linux/spi/spi.h>
25 #define DRIVER_NAME "dw_spi_pci"
32 static int __devinit spi_pci_probe(struct pci_dev *pdev,
33 const struct pci_device_id *ent)
35 struct dw_spi_pci *dwpci;
40 printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
41 pdev->vendor, pdev->device);
43 ret = pci_enable_device(pdev);
47 dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
56 /* Get basic io resource and map it */
57 dws->paddr = pci_resource_start(pdev, pci_bar);
58 dws->iolen = pci_resource_len(pdev, pci_bar);
60 ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
64 dws->regs = ioremap_nocache((unsigned long)dws->paddr,
65 pci_resource_len(pdev, pci_bar));
71 dws->parent_dev = &pdev->dev;
74 dws->max_freq = 25000000; /* for Moorestwon */
76 dws->fifo_len = 40; /* FIFO has 40 words buffer */
78 ret = dw_spi_add_host(dws);
82 /* PCI hook and SPI hook use the same drv data */
83 pci_set_drvdata(pdev, dwpci);
89 pci_release_region(pdev, pci_bar);
93 pci_disable_device(pdev);
97 static void __devexit spi_pci_remove(struct pci_dev *pdev)
99 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
101 pci_set_drvdata(pdev, NULL);
102 dw_spi_remove_host(&dwpci->dws);
103 iounmap(dwpci->dws.regs);
104 pci_release_region(pdev, 0);
106 pci_disable_device(pdev);
110 static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
112 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
115 ret = dw_spi_suspend_host(&dwpci->dws);
118 pci_save_state(pdev);
119 pci_disable_device(pdev);
120 pci_set_power_state(pdev, pci_choose_state(pdev, state));
124 static int spi_resume(struct pci_dev *pdev)
126 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
129 pci_set_power_state(pdev, PCI_D0);
130 pci_restore_state(pdev);
131 ret = pci_enable_device(pdev);
134 return dw_spi_resume_host(&dwpci->dws);
137 #define spi_suspend NULL
138 #define spi_resume NULL
141 static const struct pci_device_id pci_ids[] __devinitdata = {
142 /* Intel Moorestown platform SPI controller 0 */
143 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
147 static struct pci_driver dw_spi_driver = {
150 .probe = spi_pci_probe,
151 .remove = __devexit_p(spi_pci_remove),
152 .suspend = spi_suspend,
153 .resume = spi_resume,
156 static int __init mrst_spi_init(void)
158 return pci_register_driver(&dw_spi_driver);
161 static void __exit mrst_spi_exit(void)
163 pci_unregister_driver(&dw_spi_driver);
166 module_init(mrst_spi_init);
167 module_exit(mrst_spi_exit);
169 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
170 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
171 MODULE_LICENSE("GPL v2");