blob: 3cfd4357489aba1a5904da3f39d0d12346d2a908 [file] [log] [blame]
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +01001/*
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>
Paul Gortmakerd7614de2011-07-03 15:44:29 -04008#include <linux/module.h>
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +01009#include <linux/spi/pxa2xx_spi.h>
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +080010#include <linux/clk.h>
11#include <linux/clk-provider.h>
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +010012
Mika Westerbergb729bf32014-08-19 20:29:19 +030013#include <linux/dmaengine.h>
14#include <linux/platform_data/dma-dw.h>
15
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080016enum {
17 PORT_CE4100,
18 PORT_BYT,
Mika Westerberg39d36532014-08-19 20:29:21 +030019 PORT_BSW0,
20 PORT_BSW1,
21 PORT_BSW2,
Weike Chene5262d02014-11-26 02:35:10 -080022 PORT_QUARK_X1000,
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080023};
24
25struct pxa_spi_info {
26 enum pxa_ssp_type type;
27 int port_id;
28 int num_chipselect;
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +080029 unsigned long max_clk_rate;
Mika Westerbergb729bf32014-08-19 20:29:19 +030030
31 /* DMA channel request parameters */
32 void *tx_param;
33 void *rx_param;
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080034};
35
Mika Westerbergb729bf32014-08-19 20:29:19 +030036static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
37static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
38
Mika Westerberg39d36532014-08-19 20:29:21 +030039static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
40static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
41static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
42static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
43static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
44static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
45
Mika Westerbergb729bf32014-08-19 20:29:19 +030046static bool lpss_dma_filter(struct dma_chan *chan, void *param)
47{
48 struct dw_dma_slave *dws = param;
49
50 if (dws->dma_dev != chan->device->dev)
51 return false;
52
53 chan->private = dws;
54 return true;
55}
56
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080057static struct pxa_spi_info spi_info_configs[] = {
58 [PORT_CE4100] = {
59 .type = PXA25x_SSP,
60 .port_id = -1,
61 .num_chipselect = -1,
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +080062 .max_clk_rate = 3686400,
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080063 },
64 [PORT_BYT] = {
Jarkko Nikula03fbf482015-06-04 16:55:10 +030065 .type = LPSS_BYT_SSP,
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080066 .port_id = 0,
67 .num_chipselect = 1,
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +080068 .max_clk_rate = 50000000,
Mika Westerbergb729bf32014-08-19 20:29:19 +030069 .tx_param = &byt_tx_param,
70 .rx_param = &byt_rx_param,
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080071 },
Mika Westerberg39d36532014-08-19 20:29:21 +030072 [PORT_BSW0] = {
Jarkko Nikula03fbf482015-06-04 16:55:10 +030073 .type = LPSS_BYT_SSP,
Mika Westerberg39d36532014-08-19 20:29:21 +030074 .port_id = 0,
75 .num_chipselect = 1,
76 .max_clk_rate = 50000000,
77 .tx_param = &bsw0_tx_param,
78 .rx_param = &bsw0_rx_param,
79 },
80 [PORT_BSW1] = {
Jarkko Nikula03fbf482015-06-04 16:55:10 +030081 .type = LPSS_BYT_SSP,
Mika Westerberg39d36532014-08-19 20:29:21 +030082 .port_id = 1,
83 .num_chipselect = 1,
84 .max_clk_rate = 50000000,
85 .tx_param = &bsw1_tx_param,
86 .rx_param = &bsw1_rx_param,
87 },
88 [PORT_BSW2] = {
Jarkko Nikula03fbf482015-06-04 16:55:10 +030089 .type = LPSS_BYT_SSP,
Mika Westerberg39d36532014-08-19 20:29:21 +030090 .port_id = 2,
91 .num_chipselect = 1,
92 .max_clk_rate = 50000000,
93 .tx_param = &bsw2_tx_param,
94 .rx_param = &bsw2_rx_param,
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +080095 },
Weike Chene5262d02014-11-26 02:35:10 -080096 [PORT_QUARK_X1000] = {
97 .type = QUARK_X1000_SSP,
98 .port_id = -1,
99 .num_chipselect = 1,
100 .max_clk_rate = 50000000,
101 },
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800102};
103
104static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100105 const struct pci_device_id *ent)
106{
Mika Westerberg02027752013-01-07 12:44:32 +0200107 struct platform_device_info pi;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100108 int ret;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100109 struct platform_device *pdev;
Sebastian Andrzej Siewior0f3e1d22011-02-03 00:31:21 +0530110 struct pxa2xx_spi_master spi_pdata;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100111 struct ssp_device *ssp;
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800112 struct pxa_spi_info *c;
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800113 char buf[40];
Mika Westerbergb729bf32014-08-19 20:29:19 +0300114 struct pci_dev *dma_dev;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100115
Mika Westerberg02027752013-01-07 12:44:32 +0200116 ret = pcim_enable_device(dev);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100117 if (ret)
118 return ret;
119
Mika Westerberg02027752013-01-07 12:44:32 +0200120 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
Mika Westerbergc1346342013-03-05 12:05:16 +0200121 if (ret)
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100122 return ret;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100123
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800124 c = &spi_info_configs[ent->driver_data];
125
Sebastian Andrzej Siewior0f3e1d22011-02-03 00:31:21 +0530126 memset(&spi_pdata, 0, sizeof(spi_pdata));
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800127 spi_pdata.num_chipselect = (c->num_chipselect > 0) ?
128 c->num_chipselect : dev->devfn;
Mika Westerbergb729bf32014-08-19 20:29:19 +0300129
130 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
131
132 if (c->tx_param) {
133 struct dw_dma_slave *slave = c->tx_param;
134
135 slave->dma_dev = &dma_dev->dev;
136 slave->src_master = 1;
137 slave->dst_master = 0;
138 }
139
140 if (c->rx_param) {
141 struct dw_dma_slave *slave = c->rx_param;
142
143 slave->dma_dev = &dma_dev->dev;
144 slave->src_master = 1;
145 slave->dst_master = 0;
146 }
147
148 spi_pdata.dma_filter = lpss_dma_filter;
149 spi_pdata.tx_param = c->tx_param;
150 spi_pdata.rx_param = c->rx_param;
151 spi_pdata.enable_dma = c->rx_param && c->tx_param;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100152
Mika Westerberg851bacf2013-01-07 12:44:33 +0200153 ssp = &spi_pdata.ssp;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100154 ssp->phys_base = pci_resource_start(dev, 0);
Mika Westerberg02027752013-01-07 12:44:32 +0200155 ssp->mmio_base = pcim_iomap_table(dev)[0];
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100156 if (!ssp->mmio_base) {
Mika Westerberg02027752013-01-07 12:44:32 +0200157 dev_err(&dev->dev, "failed to ioremap() registers\n");
158 return -EIO;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100159 }
160 ssp->irq = dev->irq;
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800161 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
162 ssp->type = c->type;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100163
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800164 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
165 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL,
166 CLK_IS_ROOT, c->max_clk_rate);
167 if (IS_ERR(ssp->clk))
168 return PTR_ERR(ssp->clk);
169
Mika Westerberg02027752013-01-07 12:44:32 +0200170 memset(&pi, 0, sizeof(pi));
171 pi.parent = &dev->dev;
172 pi.name = "pxa2xx-spi";
173 pi.id = ssp->port_id;
174 pi.data = &spi_pdata;
175 pi.size_data = sizeof(spi_pdata);
176
177 pdev = platform_device_register_full(&pi);
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800178 if (IS_ERR(pdev)) {
179 clk_unregister(ssp->clk);
Wei Yongjund77b5382013-02-22 10:52:35 +0800180 return PTR_ERR(pdev);
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800181 }
Mika Westerberg02027752013-01-07 12:44:32 +0200182
Mika Westerberg851bacf2013-01-07 12:44:33 +0200183 pci_set_drvdata(dev, pdev);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100184
Mika Westerberg02027752013-01-07 12:44:32 +0200185 return 0;
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100186}
187
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800188static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100189{
Mika Westerberg851bacf2013-01-07 12:44:33 +0200190 struct platform_device *pdev = pci_get_drvdata(dev);
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800191 struct pxa2xx_spi_master *spi_pdata;
192
193 spi_pdata = dev_get_platdata(&pdev->dev);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100194
Mika Westerberg851bacf2013-01-07 12:44:33 +0200195 platform_device_unregister(pdev);
Chew, Chiau Eeafa93c92014-07-25 01:10:54 +0800196 clk_unregister(spi_pdata->ssp.clk);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100197}
198
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800199static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
200 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
Weike Chene5262d02014-11-26 02:35:10 -0800201 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800202 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
Mika Westerberg39d36532014-08-19 20:29:21 +0300203 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
204 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
205 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100206 { },
207};
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800208MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100209
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800210static struct pci_driver pxa2xx_spi_pci_driver = {
211 .name = "pxa2xx_spi_pci",
212 .id_table = pxa2xx_spi_pci_devices,
213 .probe = pxa2xx_spi_pci_probe,
214 .remove = pxa2xx_spi_pci_remove,
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100215};
216
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800217module_pci_driver(pxa2xx_spi_pci_driver);
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100218
Chew, Chiau Eed6ba32d2014-04-18 00:26:06 +0800219MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
Sebastian Andrzej Siewiord6ea3df2010-11-24 10:17:14 +0100220MODULE_LICENSE("GPL v2");
221MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");