2 * PCI interface driver for DW SPI Core
4 * Copyright (c) 2009, 2014 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
16 #include <linux/interrupt.h>
17 #include <linux/pci.h>
18 #include <linux/slab.h>
19 #include <linux/spi/spi.h>
20 #include <linux/module.h>
24 #define DRIVER_NAME "dw_spi_pci"
32 int (*setup
)(struct dw_spi
*);
35 static struct spi_pci_desc spi_pci_mid_desc
= {
36 .setup
= dw_spi_mid_init
,
39 static int spi_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
41 struct dw_spi_pci
*dwpci
;
43 struct spi_pci_desc
*desc
= (struct spi_pci_desc
*)ent
->driver_data
;
47 ret
= pcim_enable_device(pdev
);
51 dwpci
= devm_kzalloc(&pdev
->dev
, sizeof(struct dw_spi_pci
),
59 /* Get basic io resource and map it */
60 dws
->paddr
= pci_resource_start(pdev
, pci_bar
);
62 ret
= pcim_iomap_regions(pdev
, 1 << pci_bar
, pci_name(pdev
));
66 dws
->regs
= pcim_iomap_table(pdev
)[pci_bar
];
73 * Specific handling for paltforms, like dma setup,
74 * clock rate, FIFO depth.
76 if (desc
&& desc
->setup
) {
77 ret
= desc
->setup(dws
);
82 ret
= dw_spi_add_host(&pdev
->dev
, dws
);
86 /* PCI hook and SPI hook use the same drv data */
87 pci_set_drvdata(pdev
, dwpci
);
89 dev_info(&pdev
->dev
, "found PCI SPI controller(ID: %04x:%04x)\n",
90 pdev
->vendor
, pdev
->device
);
95 static void spi_pci_remove(struct pci_dev
*pdev
)
97 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
99 dw_spi_remove_host(&dwpci
->dws
);
102 #ifdef CONFIG_PM_SLEEP
103 static int spi_suspend(struct device
*dev
)
105 struct pci_dev
*pdev
= to_pci_dev(dev
);
106 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
108 return dw_spi_suspend_host(&dwpci
->dws
);
111 static int spi_resume(struct device
*dev
)
113 struct pci_dev
*pdev
= to_pci_dev(dev
);
114 struct dw_spi_pci
*dwpci
= pci_get_drvdata(pdev
);
116 return dw_spi_resume_host(&dwpci
->dws
);
120 static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops
, spi_suspend
, spi_resume
);
122 static const struct pci_device_id pci_ids
[] = {
123 /* Intel MID platform SPI controller 0 */
124 { PCI_VDEVICE(INTEL
, 0x0800), (kernel_ulong_t
)&spi_pci_mid_desc
},
128 static struct pci_driver dw_spi_driver
= {
131 .probe
= spi_pci_probe
,
132 .remove
= spi_pci_remove
,
134 .pm
= &dw_spi_pm_ops
,
138 module_pci_driver(dw_spi_driver
);
140 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
141 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
142 MODULE_LICENSE("GPL v2");