1 // SPDX-License-Identifier: GPL-2.0-only
3 * CE4100's SPI device is more or less the same one as found on PXA
5 * Copyright (C) 2016, Intel Corporation
7 #include <linux/clk-provider.h>
8 #include <linux/module.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>
29 enum pxa_ssp_type type;
32 unsigned long max_clk_rate;
34 /* DMA channel request parameters */
35 bool (*dma_filter)(struct dma_chan *chan, void *param);
41 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
44 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
45 static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
47 static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
48 static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
49 static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
50 static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
51 static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
52 static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
54 static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
55 static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
56 static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
57 static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
58 static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
59 static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
61 static struct dw_dma_slave lpt1_tx_param = { .dst_id = 0 };
62 static struct dw_dma_slave lpt1_rx_param = { .src_id = 1 };
63 static struct dw_dma_slave lpt0_tx_param = { .dst_id = 2 };
64 static struct dw_dma_slave lpt0_rx_param = { .src_id = 3 };
66 static bool lpss_dma_filter(struct dma_chan *chan, void *param)
68 struct dw_dma_slave *dws = param;
70 if (dws->dma_dev != chan->device->dev)
77 static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
79 struct pci_dev *dma_dev;
81 c->num_chipselect = 1;
82 c->max_clk_rate = 50000000;
84 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
87 struct dw_dma_slave *slave = c->tx_param;
89 slave->dma_dev = &dma_dev->dev;
95 struct dw_dma_slave *slave = c->rx_param;
97 slave->dma_dev = &dma_dev->dev;
102 c->dma_filter = lpss_dma_filter;
106 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
108 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
109 struct dw_dma_slave *tx, *rx;
111 switch (PCI_FUNC(dev->devfn)) {
114 c->num_chipselect = 1;
115 c->tx_param = &mrfld3_tx_param;
116 c->rx_param = &mrfld3_rx_param;
120 c->num_chipselect = 4;
121 c->tx_param = &mrfld5_tx_param;
122 c->rx_param = &mrfld5_rx_param;
126 c->num_chipselect = 1;
127 c->tx_param = &mrfld6_tx_param;
128 c->rx_param = &mrfld6_rx_param;
135 tx->dma_dev = &dma_dev->dev;
138 rx->dma_dev = &dma_dev->dev;
140 c->dma_filter = lpss_dma_filter;
141 c->dma_burst_size = 8;
145 static struct pxa_spi_info spi_info_configs[] = {
149 .num_chipselect = -1,
150 .max_clk_rate = 3686400,
153 .type = LPSS_BYT_SSP,
155 .setup = lpss_spi_setup,
156 .tx_param = &byt_tx_param,
157 .rx_param = &byt_rx_param,
160 .type = LPSS_BSW_SSP,
162 .setup = lpss_spi_setup,
163 .tx_param = &bsw0_tx_param,
164 .rx_param = &bsw0_rx_param,
167 .type = LPSS_BSW_SSP,
169 .setup = lpss_spi_setup,
170 .tx_param = &bsw1_tx_param,
171 .rx_param = &bsw1_rx_param,
174 .type = LPSS_BSW_SSP,
176 .setup = lpss_spi_setup,
177 .tx_param = &bsw2_tx_param,
178 .rx_param = &bsw2_rx_param,
182 .max_clk_rate = 25000000,
183 .setup = mrfld_spi_setup,
185 [PORT_QUARK_X1000] = {
186 .type = QUARK_X1000_SSP,
189 .max_clk_rate = 50000000,
192 .type = LPSS_LPT_SSP,
194 .setup = lpss_spi_setup,
195 .tx_param = &lpt0_tx_param,
196 .rx_param = &lpt0_rx_param,
199 .type = LPSS_LPT_SSP,
201 .setup = lpss_spi_setup,
202 .tx_param = &lpt1_tx_param,
203 .rx_param = &lpt1_rx_param,
207 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
208 const struct pci_device_id *ent)
210 struct platform_device_info pi;
212 struct platform_device *pdev;
213 struct pxa2xx_spi_controller spi_pdata;
214 struct ssp_device *ssp;
215 struct pxa_spi_info *c;
218 ret = pcim_enable_device(dev);
222 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
226 c = &spi_info_configs[ent->driver_data];
228 ret = c->setup(dev, c);
233 memset(&spi_pdata, 0, sizeof(spi_pdata));
234 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
235 spi_pdata.dma_filter = c->dma_filter;
236 spi_pdata.tx_param = c->tx_param;
237 spi_pdata.rx_param = c->rx_param;
238 spi_pdata.enable_dma = c->rx_param && c->tx_param;
239 spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;
241 ssp = &spi_pdata.ssp;
242 ssp->phys_base = pci_resource_start(dev, 0);
243 ssp->mmio_base = pcim_iomap_table(dev)[0];
244 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
249 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
252 ssp->irq = pci_irq_vector(dev, 0);
254 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
255 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
257 if (IS_ERR(ssp->clk))
258 return PTR_ERR(ssp->clk);
260 memset(&pi, 0, sizeof(pi));
261 pi.fwnode = dev->dev.fwnode;
262 pi.parent = &dev->dev;
263 pi.name = "pxa2xx-spi";
264 pi.id = ssp->port_id;
265 pi.data = &spi_pdata;
266 pi.size_data = sizeof(spi_pdata);
268 pdev = platform_device_register_full(&pi);
270 clk_unregister(ssp->clk);
271 return PTR_ERR(pdev);
274 pci_set_drvdata(dev, pdev);
279 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
281 struct platform_device *pdev = pci_get_drvdata(dev);
282 struct pxa2xx_spi_controller *spi_pdata;
284 spi_pdata = dev_get_platdata(&pdev->dev);
286 platform_device_unregister(pdev);
287 clk_unregister(spi_pdata->ssp.clk);
290 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
291 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
292 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
293 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
294 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
295 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
296 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
297 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
298 { PCI_VDEVICE(INTEL, 0x9c65), PORT_LPT0 },
299 { PCI_VDEVICE(INTEL, 0x9c66), PORT_LPT1 },
300 { PCI_VDEVICE(INTEL, 0x9ce5), PORT_LPT0 },
301 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT1 },
304 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
306 static struct pci_driver pxa2xx_spi_pci_driver = {
307 .name = "pxa2xx_spi_pci",
308 .id_table = pxa2xx_spi_pci_devices,
309 .probe = pxa2xx_spi_pci_probe,
310 .remove = pxa2xx_spi_pci_remove,
313 module_pci_driver(pxa2xx_spi_pci_driver);
315 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
316 MODULE_LICENSE("GPL v2");
317 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");