[linux-2.6-block.git] / drivers / spi / spi-pxa2xx-pci.c

/*
 * CE4100's SPI device is more or less the same one as found on PXA
 *
 */
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/module.h>
#include <linux/spi/pxa2xx_spi.h>
#include <linux/clk-provider.h>

#include <linux/dmaengine.h>
#include <linux/platform_data/dma-dw.h>

enum {
	PORT_CE4100,
	PORT_BYT,
	PORT_MRFLD,
	PORT_BSW0,
	PORT_BSW1,
	PORT_BSW2,
	PORT_QUARK_X1000,
	PORT_LPT,
};

struct pxa_spi_info {
	enum pxa_ssp_type type;
	int port_id;
	int num_chipselect;
	unsigned long max_clk_rate;

	/* DMA channel request parameters */
	bool (*dma_filter)(struct dma_chan *chan, void *param);
	void *tx_param;
	void *rx_param;

	int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
};

static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
static struct dw_dma_slave byt_rx_param = { .src_id = 1 };

static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };

static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };

static bool lpss_dma_filter(struct dma_chan *chan, void *param)
{
	struct dw_dma_slave *dws = param;

	if (dws->dma_dev != chan->device->dev)
		return false;

	chan->private = dws;
	return true;
}

static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
{
	struct pci_dev *dma_dev;

	c->num_chipselect = 1;
	c->max_clk_rate = 50000000;

	dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));

	if (c->tx_param) {
		struct dw_dma_slave *slave = c->tx_param;

		slave->dma_dev = &dma_dev->dev;
		slave->m_master = 0;
		slave->p_master = 1;
	}

	if (c->rx_param) {
		struct dw_dma_slave *slave = c->rx_param;

		slave->dma_dev = &dma_dev->dev;
		slave->m_master = 0;
		slave->p_master = 1;
	}

	c->dma_filter = lpss_dma_filter;
	return 0;
}

static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
{
	switch (PCI_FUNC(dev->devfn)) {
	case 0:
		c->port_id = 3;
		c->num_chipselect = 1;
		break;
	case 1:
		c->port_id = 5;
		c->num_chipselect = 4;
		break;
	case 2:
		c->port_id = 6;
		c->num_chipselect = 1;
		break;
	default:
		return -ENODEV;
	}
	return 0;
}

static struct pxa_spi_info spi_info_configs[] = {
	[PORT_CE4100] = {
		.type = PXA25x_SSP,
		.port_id =  -1,
		.num_chipselect = -1,
		.max_clk_rate = 3686400,
	},
	[PORT_BYT] = {
		.type = LPSS_BYT_SSP,
		.port_id = 0,
		.setup = lpss_spi_setup,
		.tx_param = &byt_tx_param,
		.rx_param = &byt_rx_param,
	},
	[PORT_BSW0] = {
		.type = LPSS_BYT_SSP,
		.port_id = 0,
		.setup = lpss_spi_setup,
		.tx_param = &bsw0_tx_param,
		.rx_param = &bsw0_rx_param,
	},
	[PORT_BSW1] = {
		.type = LPSS_BYT_SSP,
		.port_id = 1,
		.setup = lpss_spi_setup,
		.tx_param = &bsw1_tx_param,
		.rx_param = &bsw1_rx_param,
	},
	[PORT_BSW2] = {
		.type = LPSS_BYT_SSP,
		.port_id = 2,
		.setup = lpss_spi_setup,
		.tx_param = &bsw2_tx_param,
		.rx_param = &bsw2_rx_param,
	},
	[PORT_MRFLD] = {
		.type = PXA27x_SSP,
		.max_clk_rate = 25000000,
		.setup = mrfld_spi_setup,
	},
	[PORT_QUARK_X1000] = {
		.type = QUARK_X1000_SSP,
		.port_id = -1,
		.num_chipselect = 1,
		.max_clk_rate = 50000000,
	},
	[PORT_LPT] = {
		.type = LPSS_LPT_SSP,
		.port_id = 0,
		.setup = lpss_spi_setup,
		.tx_param = &lpt_tx_param,
		.rx_param = &lpt_rx_param,
	},
};

static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
		const struct pci_device_id *ent)
{
	struct platform_device_info pi;
	int ret;
	struct platform_device *pdev;
	struct pxa2xx_spi_master spi_pdata;
	struct ssp_device *ssp;
	struct pxa_spi_info *c;
	char buf[40];

	ret = pcim_enable_device(dev);
	if (ret)
		return ret;

	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
	if (ret)
		return ret;

	c = &spi_info_configs[ent->driver_data];
	if (c->setup) {
		ret = c->setup(dev, c);
		if (ret)
			return ret;
	}

	memset(&spi_pdata, 0, sizeof(spi_pdata));
	spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
	spi_pdata.dma_filter = c->dma_filter;
	spi_pdata.tx_param = c->tx_param;
	spi_pdata.rx_param = c->rx_param;
	spi_pdata.enable_dma = c->rx_param && c->tx_param;

	ssp = &spi_pdata.ssp;
	ssp->phys_base = pci_resource_start(dev, 0);
	ssp->mmio_base = pcim_iomap_table(dev)[0];
	ssp->irq = dev->irq;
	ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
	ssp->type = c->type;

	snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
	ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
					   c->max_clk_rate);
	 if (IS_ERR(ssp->clk))
		return PTR_ERR(ssp->clk);

	memset(&pi, 0, sizeof(pi));
	pi.parent = &dev->dev;
	pi.name = "pxa2xx-spi";
	pi.id = ssp->port_id;
	pi.data = &spi_pdata;
	pi.size_data = sizeof(spi_pdata);

	pdev = platform_device_register_full(&pi);
	if (IS_ERR(pdev)) {
		clk_unregister(ssp->clk);
		return PTR_ERR(pdev);
	}

	pci_set_drvdata(dev, pdev);

	return 0;
}

static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
{
	struct platform_device *pdev = pci_get_drvdata(dev);
	struct pxa2xx_spi_master *spi_pdata;

	spi_pdata = dev_get_platdata(&pdev->dev);

	platform_device_unregister(pdev);
	clk_unregister(spi_pdata->ssp.clk);
}

static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
	{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
	{ PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
	{ PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
	{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
	{ PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
	{ },
};
MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);

static struct pci_driver pxa2xx_spi_pci_driver = {
	.name           = "pxa2xx_spi_pci",
	.id_table       = pxa2xx_spi_pci_devices,
	.probe          = pxa2xx_spi_pci_probe,
	.remove         = pxa2xx_spi_pci_remove,
};

module_pci_driver(pxa2xx_spi_pci_driver);

MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
Commit	Line	Data
d6ea3df0 SAS	1	/*
	2	* CE4100's SPI device is more or less the same one as found on PXA
	3	*
	4	*/
	5	#include <linux/pci.h>
	6	#include <linux/platform_device.h>
	7	#include <linux/of_device.h>
d7614de4	8	#include <linux/module.h>
d6ea3df0	9	#include <linux/spi/pxa2xx_spi.h>
afa93c90	10	#include <linux/clk-provider.h>
d6ea3df0	11
b729bf34 MW	12	#include <linux/dmaengine.h>
	13	#include <linux/platform_data/dma-dw.h>
	14
d6ba32d5 CCE	15	enum {
	16	PORT_CE4100,
	17	PORT_BYT,
4f470910	18	PORT_MRFLD,
39d36536 MW	19	PORT_BSW0,
	20	PORT_BSW1,
	21	PORT_BSW2,
e5262d05	22	PORT_QUARK_X1000,
caba248d	23	PORT_LPT,
d6ba32d5 CCE	24	};
	25
	26	struct pxa_spi_info {
	27	enum pxa_ssp_type type;
	28	int port_id;
	29	int num_chipselect;
afa93c90	30	unsigned long max_clk_rate;
b729bf34 MW	31
b729bf34 MW	32	/* DMA channel request parameters */
743485ea	33	bool (dma_filter)(struct dma_chan chan, void *param);
b729bf34 MW	34	void *tx_param;
b729bf34 MW	35	void *rx_param;
743485ea AS	36
743485ea AS	37	int (setup)(struct pci_dev pdev, struct pxa_spi_info *c);
d6ba32d5 CCE	38	};
d6ba32d5 CCE	39
b729bf34 MW	40	static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
	41	static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
	42
39d36536 MW	43	static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
	44	static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
	45	static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
	46	static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
	47	static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
	48	static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
	49
caba248d LL	50	static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
	51	static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
	52
b729bf34 MW	53	static bool lpss_dma_filter(struct dma_chan chan, void param)
	54	{
	55	struct dw_dma_slave *dws = param;
	56
	57	if (dws->dma_dev != chan->device->dev)
	58	return false;
	59
	60	chan->private = dws;
	61	return true;
	62	}
	63
743485ea AS	64	static int lpss_spi_setup(struct pci_dev dev, struct pxa_spi_info c)
	65	{
	66	struct pci_dev *dma_dev;
	67
	68	c->num_chipselect = 1;
	69	c->max_clk_rate = 50000000;
	70
	71	dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
	72
	73	if (c->tx_param) {
	74	struct dw_dma_slave *slave = c->tx_param;
	75
	76	slave->dma_dev = &dma_dev->dev;
	77	slave->m_master = 0;
	78	slave->p_master = 1;
	79	}
	80
	81	if (c->rx_param) {
	82	struct dw_dma_slave *slave = c->rx_param;
	83
	84	slave->dma_dev = &dma_dev->dev;
	85	slave->m_master = 0;
	86	slave->p_master = 1;
	87	}
	88
	89	c->dma_filter = lpss_dma_filter;
	90	return 0;
	91	}
	92
4f470910 AS	93	static int mrfld_spi_setup(struct pci_dev dev, struct pxa_spi_info c)
	94	{
	95	switch (PCI_FUNC(dev->devfn)) {
	96	case 0:
	97	c->port_id = 3;
	98	c->num_chipselect = 1;
	99	break;
	100	case 1:
	101	c->port_id = 5;
	102	c->num_chipselect = 4;
	103	break;
	104	case 2:
	105	c->port_id = 6;
	106	c->num_chipselect = 1;
	107	break;
	108	default:
	109	return -ENODEV;
	110	}
	111	return 0;
	112	}
	113
d6ba32d5 CCE	114	static struct pxa_spi_info spi_info_configs[] = {
	115	[PORT_CE4100] = {
	116	.type = PXA25x_SSP,
	117	.port_id = -1,
	118	.num_chipselect = -1,
afa93c90	119	.max_clk_rate = 3686400,
d6ba32d5 CCE	120	},
d6ba32d5 CCE	121	[PORT_BYT] = {
03fbf488	122	.type = LPSS_BYT_SSP,
d6ba32d5	123	.port_id = 0,
743485ea	124	.setup = lpss_spi_setup,
b729bf34 MW	125	.tx_param = &byt_tx_param,
b729bf34 MW	126	.rx_param = &byt_rx_param,
d6ba32d5	127	},
39d36536	128	[PORT_BSW0] = {
03fbf488	129	.type = LPSS_BYT_SSP,
39d36536	130	.port_id = 0,
743485ea	131	.setup = lpss_spi_setup,
39d36536 MW	132	.tx_param = &bsw0_tx_param,
	133	.rx_param = &bsw0_rx_param,
	134	},
	135	[PORT_BSW1] = {
03fbf488	136	.type = LPSS_BYT_SSP,
39d36536	137	.port_id = 1,
743485ea	138	.setup = lpss_spi_setup,
39d36536 MW	139	.tx_param = &bsw1_tx_param,
	140	.rx_param = &bsw1_rx_param,
	141	},
	142	[PORT_BSW2] = {
03fbf488	143	.type = LPSS_BYT_SSP,
39d36536	144	.port_id = 2,
743485ea	145	.setup = lpss_spi_setup,
39d36536 MW	146	.tx_param = &bsw2_tx_param,
39d36536 MW	147	.rx_param = &bsw2_rx_param,
d6ba32d5	148	},
4f470910 AS	149	[PORT_MRFLD] = {
	150	.type = PXA27x_SSP,
	151	.max_clk_rate = 25000000,
	152	.setup = mrfld_spi_setup,
	153	},
e5262d05 WC	154	[PORT_QUARK_X1000] = {
	155	.type = QUARK_X1000_SSP,
	156	.port_id = -1,
	157	.num_chipselect = 1,
	158	.max_clk_rate = 50000000,
	159	},
caba248d LL	160	[PORT_LPT] = {
	161	.type = LPSS_LPT_SSP,
	162	.port_id = 0,
743485ea	163	.setup = lpss_spi_setup,
caba248d LL	164	.tx_param = &lpt_tx_param,
	165	.rx_param = &lpt_rx_param,
	166	},
d6ba32d5 CCE	167	};
	168
	169	static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
d6ea3df0 SAS	170	const struct pci_device_id *ent)
d6ea3df0 SAS	171	{
0202775b	172	struct platform_device_info pi;
d6ea3df0	173	int ret;
d6ea3df0	174	struct platform_device *pdev;
0f3e1d27	175	struct pxa2xx_spi_master spi_pdata;
d6ea3df0	176	struct ssp_device *ssp;
d6ba32d5	177	struct pxa_spi_info *c;
afa93c90	178	char buf[40];
d6ea3df0	179
0202775b	180	ret = pcim_enable_device(dev);
d6ea3df0 SAS	181	if (ret)
	182	return ret;
	183
0202775b	184	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
c1346340	185	if (ret)
d6ea3df0	186	return ret;
d6ea3df0	187
d6ba32d5	188	c = &spi_info_configs[ent->driver_data];
743485ea AS	189	if (c->setup) {
	190	ret = c->setup(dev, c);
	191	if (ret)
	192	return ret;
b729bf34 MW	193	}
b729bf34 MW	194
743485ea AS	195	memset(&spi_pdata, 0, sizeof(spi_pdata));
	196	spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
	197	spi_pdata.dma_filter = c->dma_filter;
b729bf34 MW	198	spi_pdata.tx_param = c->tx_param;
	199	spi_pdata.rx_param = c->rx_param;
	200	spi_pdata.enable_dma = c->rx_param && c->tx_param;
d6ea3df0	201
851bacf5	202	ssp = &spi_pdata.ssp;
d6ea3df0	203	ssp->phys_base = pci_resource_start(dev, 0);
0202775b	204	ssp->mmio_base = pcim_iomap_table(dev)[0];
d6ea3df0	205	ssp->irq = dev->irq;
d6ba32d5 CCE	206	ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
d6ba32d5 CCE	207	ssp->type = c->type;
d6ea3df0	208
afa93c90	209	snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
280af2b8 SB	210	ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
280af2b8 SB	211	c->max_clk_rate);
afa93c90 CCE	212	if (IS_ERR(ssp->clk))
	213	return PTR_ERR(ssp->clk);
	214
0202775b MW	215	memset(&pi, 0, sizeof(pi));
	216	pi.parent = &dev->dev;
	217	pi.name = "pxa2xx-spi";
	218	pi.id = ssp->port_id;
	219	pi.data = &spi_pdata;
	220	pi.size_data = sizeof(spi_pdata);
d6ea3df0	221
0202775b	222	pdev = platform_device_register_full(&pi);
afa93c90 CCE	223	if (IS_ERR(pdev)) {
afa93c90 CCE	224	clk_unregister(ssp->clk);
d77b5382	225	return PTR_ERR(pdev);
afa93c90	226	}
d6ea3df0	227
851bacf5	228	pci_set_drvdata(dev, pdev);
d6ea3df0	229
0202775b	230	return 0;
d6ea3df0 SAS	231	}
d6ea3df0 SAS	232
d6ba32d5	233	static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
d6ea3df0	234	{
851bacf5	235	struct platform_device *pdev = pci_get_drvdata(dev);
afa93c90 CCE	236	struct pxa2xx_spi_master *spi_pdata;
	237
	238	spi_pdata = dev_get_platdata(&pdev->dev);
d6ea3df0	239
851bacf5	240	platform_device_unregister(pdev);
afa93c90	241	clk_unregister(spi_pdata->ssp.clk);
d6ea3df0 SAS	242	}
d6ea3df0 SAS	243
d6ba32d5 CCE	244	static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
d6ba32d5 CCE	245	{ PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
e5262d05	246	{ PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
d6ba32d5	247	{ PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
4f470910	248	{ PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
39d36536 MW	249	{ PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
	250	{ PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
	251	{ PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
caba248d	252	{ PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
d6ea3df0 SAS	253	{ },
d6ea3df0 SAS	254	};
d6ba32d5	255	MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
d6ea3df0	256
d6ba32d5 CCE	257	static struct pci_driver pxa2xx_spi_pci_driver = {
	258	.name = "pxa2xx_spi_pci",
	259	.id_table = pxa2xx_spi_pci_devices,
	260	.probe = pxa2xx_spi_pci_probe,
	261	.remove = pxa2xx_spi_pci_remove,
d6ea3df0 SAS	262	};
d6ea3df0 SAS	263
d6ba32d5	264	module_pci_driver(pxa2xx_spi_pci_driver);
d6ea3df0	265
d6ba32d5	266	MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
d6ea3df0 SAS	267	MODULE_LICENSE("GPL v2");
d6ea3df0 SAS	268	MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");