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/slab.h>
23 #include <linux/spi/dw_spi.h>
24 #include <linux/spi/spi.h>
26 #define DRIVER_NAME "dw_spi_pci"
33 static int __devinit spi_pci_probe(struct pci_dev *pdev,
34 const struct pci_device_id *ent)
36 struct dw_spi_pci *dwpci;
41 printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
42 pdev->vendor, pdev->device);
44 ret = pci_enable_device(pdev);
48 dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
57 /* Get basic io resource and map it */
58 dws->paddr = pci_resource_start(pdev, pci_bar);
59 dws->iolen = pci_resource_len(pdev, pci_bar);
61 ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
65 dws->regs = ioremap_nocache((unsigned long)dws->paddr,
66 pci_resource_len(pdev, pci_bar));
72 dws->parent_dev = &pdev->dev;
75 dws->max_freq = 25000000; /* for Moorestwon */
77 dws->fifo_len = 40; /* FIFO has 40 words buffer */
79 ret = dw_spi_add_host(dws);
83 /* PCI hook and SPI hook use the same drv data */
84 pci_set_drvdata(pdev, dwpci);
90 pci_release_region(pdev, pci_bar);
94 pci_disable_device(pdev);
98 static void __devexit spi_pci_remove(struct pci_dev *pdev)
100 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
102 pci_set_drvdata(pdev, NULL);
103 dw_spi_remove_host(&dwpci->dws);
104 iounmap(dwpci->dws.regs);
105 pci_release_region(pdev, 0);
107 pci_disable_device(pdev);
111 static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
113 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
116 ret = dw_spi_suspend_host(&dwpci->dws);
119 pci_save_state(pdev);
120 pci_disable_device(pdev);
121 pci_set_power_state(pdev, pci_choose_state(pdev, state));
125 static int spi_resume(struct pci_dev *pdev)
127 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
130 pci_set_power_state(pdev, PCI_D0);
131 pci_restore_state(pdev);
132 ret = pci_enable_device(pdev);
135 return dw_spi_resume_host(&dwpci->dws);
138 #define spi_suspend NULL
139 #define spi_resume NULL
142 static const struct pci_device_id pci_ids[] __devinitdata = {
143 /* Intel Moorestown platform SPI controller 0 */
144 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
148 static struct pci_driver dw_spi_driver = {
151 .probe = spi_pci_probe,
152 .remove = __devexit_p(spi_pci_remove),
153 .suspend = spi_suspend,
154 .resume = spi_resume,
157 static int __init mrst_spi_init(void)
159 return pci_register_driver(&dw_spi_driver);
162 static void __exit mrst_spi_exit(void)
164 pci_unregister_driver(&dw_spi_driver);
167 module_init(mrst_spi_init);
168 module_exit(mrst_spi_exit);
170 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
171 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
172 MODULE_LICENSE("GPL v2");