2 * CE4100's SPI device is more or less the same one as found on PXA
4 * Copyright (C) 2016, Intel Corporation
6 #include <linux/clk-provider.h>
7 #include <linux/module.h>
8 #include <linux/of_device.h>
10 #include <linux/platform_device.h>
11 #include <linux/spi/pxa2xx_spi.h>
13 #include <linux/dmaengine.h>
14 #include <linux/platform_data/dma-dw.h>
28 enum pxa_ssp_type type;
31 unsigned long max_clk_rate;
33 /* DMA channel request parameters */
34 bool (*dma_filter)(struct dma_chan *chan, void *param);
38 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
41 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
42 static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
44 static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
45 static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
46 static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
47 static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
48 static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
49 static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
51 static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
52 static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
53 static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
54 static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
55 static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
56 static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
58 static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
59 static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
61 static bool lpss_dma_filter(struct dma_chan *chan, void *param)
63 struct dw_dma_slave *dws = param;
65 if (dws->dma_dev != chan->device->dev)
72 static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
74 struct pci_dev *dma_dev;
76 c->num_chipselect = 1;
77 c->max_clk_rate = 50000000;
79 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
82 struct dw_dma_slave *slave = c->tx_param;
84 slave->dma_dev = &dma_dev->dev;
90 struct dw_dma_slave *slave = c->rx_param;
92 slave->dma_dev = &dma_dev->dev;
97 c->dma_filter = lpss_dma_filter;
101 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
103 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
104 struct dw_dma_slave *tx, *rx;
106 switch (PCI_FUNC(dev->devfn)) {
109 c->num_chipselect = 1;
110 c->tx_param = &mrfld3_tx_param;
111 c->rx_param = &mrfld3_rx_param;
115 c->num_chipselect = 4;
116 c->tx_param = &mrfld5_tx_param;
117 c->rx_param = &mrfld5_rx_param;
121 c->num_chipselect = 1;
122 c->tx_param = &mrfld6_tx_param;
123 c->rx_param = &mrfld6_rx_param;
130 tx->dma_dev = &dma_dev->dev;
133 rx->dma_dev = &dma_dev->dev;
135 c->dma_filter = lpss_dma_filter;
139 static struct pxa_spi_info spi_info_configs[] = {
143 .num_chipselect = -1,
144 .max_clk_rate = 3686400,
147 .type = LPSS_BYT_SSP,
149 .setup = lpss_spi_setup,
150 .tx_param = &byt_tx_param,
151 .rx_param = &byt_rx_param,
154 .type = LPSS_BSW_SSP,
156 .setup = lpss_spi_setup,
157 .tx_param = &bsw0_tx_param,
158 .rx_param = &bsw0_rx_param,
161 .type = LPSS_BSW_SSP,
163 .setup = lpss_spi_setup,
164 .tx_param = &bsw1_tx_param,
165 .rx_param = &bsw1_rx_param,
168 .type = LPSS_BSW_SSP,
170 .setup = lpss_spi_setup,
171 .tx_param = &bsw2_tx_param,
172 .rx_param = &bsw2_rx_param,
176 .max_clk_rate = 25000000,
177 .setup = mrfld_spi_setup,
179 [PORT_QUARK_X1000] = {
180 .type = QUARK_X1000_SSP,
183 .max_clk_rate = 50000000,
186 .type = LPSS_LPT_SSP,
188 .setup = lpss_spi_setup,
189 .tx_param = &lpt_tx_param,
190 .rx_param = &lpt_rx_param,
194 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
195 const struct pci_device_id *ent)
197 struct platform_device_info pi;
199 struct platform_device *pdev;
200 struct pxa2xx_spi_master spi_pdata;
201 struct ssp_device *ssp;
202 struct pxa_spi_info *c;
205 ret = pcim_enable_device(dev);
209 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
213 c = &spi_info_configs[ent->driver_data];
215 ret = c->setup(dev, c);
220 memset(&spi_pdata, 0, sizeof(spi_pdata));
221 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
222 spi_pdata.dma_filter = c->dma_filter;
223 spi_pdata.tx_param = c->tx_param;
224 spi_pdata.rx_param = c->rx_param;
225 spi_pdata.enable_dma = c->rx_param && c->tx_param;
227 ssp = &spi_pdata.ssp;
228 ssp->phys_base = pci_resource_start(dev, 0);
229 ssp->mmio_base = pcim_iomap_table(dev)[0];
230 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
235 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
238 ssp->irq = pci_irq_vector(dev, 0);
240 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
241 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
243 if (IS_ERR(ssp->clk))
244 return PTR_ERR(ssp->clk);
246 memset(&pi, 0, sizeof(pi));
247 pi.fwnode = dev->dev.fwnode;
248 pi.parent = &dev->dev;
249 pi.name = "pxa2xx-spi";
250 pi.id = ssp->port_id;
251 pi.data = &spi_pdata;
252 pi.size_data = sizeof(spi_pdata);
254 pdev = platform_device_register_full(&pi);
256 clk_unregister(ssp->clk);
257 return PTR_ERR(pdev);
260 pci_set_drvdata(dev, pdev);
265 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
267 struct platform_device *pdev = pci_get_drvdata(dev);
268 struct pxa2xx_spi_master *spi_pdata;
270 spi_pdata = dev_get_platdata(&pdev->dev);
272 platform_device_unregister(pdev);
273 clk_unregister(spi_pdata->ssp.clk);
276 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
277 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
278 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
279 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
280 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
281 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
282 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
283 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
284 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
287 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
289 static struct pci_driver pxa2xx_spi_pci_driver = {
290 .name = "pxa2xx_spi_pci",
291 .id_table = pxa2xx_spi_pci_devices,
292 .probe = pxa2xx_spi_pci_probe,
293 .remove = pxa2xx_spi_pci_remove,
296 module_pci_driver(pxa2xx_spi_pci_driver);
298 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
299 MODULE_LICENSE("GPL v2");