2 * 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/spi.h>
24 #include <linux/module.h>
28 #define DRIVER_NAME "dw_spi_pci"
35 static int spi_pci_probe(struct pci_dev
*pdev
,
36 const struct pci_device_id
*ent
)
38 struct dw_spi_pci
*dwpci
;
43 printk(KERN_INFO
"DW: found PCI SPI controller(ID: %04x:%04x)\n",
44 pdev
->vendor
, pdev
->device
);
46 ret
= pci_enable_device(pdev
);
50 dwpci
= kzalloc(sizeof(struct dw_spi_pci
), GFP_KERNEL
);
59 /* Get basic io resource and map it */
60 dws
->paddr
= pci_resource_start(pdev
, pci_bar
);
61 dws
->iolen
= pci_resource_len(pdev
, pci_bar
);
63 ret
= pci_request_region(pdev
, pci_bar
, dev_name(&pdev
->dev
));
67 dws
->regs
= ioremap_nocache((unsigned long)dws
->paddr
,
68 pci_resource_len(pdev
, pci_bar
));
74 dws
->parent_dev
= &pdev
->dev
;
80 * Specific handling for Intel MID paltforms, like dma setup,
81 * clock rate, FIFO depth.
83 if (pdev
->device
== 0x0800) {
84 ret
= dw_spi_mid_init(dws
);
89 ret
= dw_spi_add_host(dws
);
93 /* PCI hook and SPI hook use the same drv data */
94 pci_set_drvdata(pdev
, dwpci
);
100 pci_release_region(pdev
, pci_bar
);
104 pci_disable_device(pdev
);
108 static void spi_pci_remove(struct pci_dev
*pdev
)
110 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
112 pci_set_drvdata(pdev
, NULL
);
113 dw_spi_remove_host(&dwpci
->dws
);
114 iounmap(dwpci
->dws
.regs
);
115 pci_release_region(pdev
, 0);
117 pci_disable_device(pdev
);
121 static int spi_suspend(struct pci_dev
*pdev
, pm_message_t state
)
123 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
126 ret
= dw_spi_suspend_host(&dwpci
->dws
);
129 pci_save_state(pdev
);
130 pci_disable_device(pdev
);
131 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
135 static int spi_resume(struct pci_dev
*pdev
)
137 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
140 pci_set_power_state(pdev
, PCI_D0
);
141 pci_restore_state(pdev
);
142 ret
= pci_enable_device(pdev
);
145 return dw_spi_resume_host(&dwpci
->dws
);
148 #define spi_suspend NULL
149 #define spi_resume NULL
152 static DEFINE_PCI_DEVICE_TABLE(pci_ids
) = {
153 /* Intel MID platform SPI controller 0 */
154 { PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x0800) },
158 static struct pci_driver dw_spi_driver
= {
161 .probe
= spi_pci_probe
,
162 .remove
= spi_pci_remove
,
163 .suspend
= spi_suspend
,
164 .resume
= spi_resume
,
167 module_pci_driver(dw_spi_driver
);
169 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
170 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
171 MODULE_LICENSE("GPL v2");
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