1 // SPDX-License-Identifier: GPL-2.0-only
3 * PCI glue driver for SPI PXA2xx compatible controllers.
4 * CE4100's SPI device is more or less the same one as found on PXA.
6 * Copyright (C) 2016, 2021 Intel Corporation
8 #include <linux/clk-provider.h>
9 #include <linux/module.h>
10 #include <linux/pci.h>
11 #include <linux/platform_device.h>
13 #include <linux/spi/pxa2xx_spi.h>
15 #include <linux/dmaengine.h>
16 #include <linux/platform_data/dma-dw.h>
18 #define PCI_DEVICE_ID_INTEL_QUARK_X1000 0x0935
19 #define PCI_DEVICE_ID_INTEL_BYT 0x0f0e
20 #define PCI_DEVICE_ID_INTEL_MRFLD 0x1194
21 #define PCI_DEVICE_ID_INTEL_BSW0 0x228e
22 #define PCI_DEVICE_ID_INTEL_BSW1 0x2290
23 #define PCI_DEVICE_ID_INTEL_BSW2 0x22ac
24 #define PCI_DEVICE_ID_INTEL_CE4100 0x2e6a
25 #define PCI_DEVICE_ID_INTEL_LPT0_0 0x9c65
26 #define PCI_DEVICE_ID_INTEL_LPT0_1 0x9c66
27 #define PCI_DEVICE_ID_INTEL_LPT1_0 0x9ce5
28 #define PCI_DEVICE_ID_INTEL_LPT1_1 0x9ce6
31 int (*setup)(struct pci_dev *pdev, struct pxa2xx_spi_controller *c);
34 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
35 static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
37 static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
38 static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
39 static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
40 static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
41 static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
42 static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
44 static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
45 static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
46 static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
47 static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
48 static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
49 static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
51 static struct dw_dma_slave lpt1_tx_param = { .dst_id = 0 };
52 static struct dw_dma_slave lpt1_rx_param = { .src_id = 1 };
53 static struct dw_dma_slave lpt0_tx_param = { .dst_id = 2 };
54 static struct dw_dma_slave lpt0_rx_param = { .src_id = 3 };
56 static void pxa2xx_spi_pci_clk_unregister(void *clk)
61 static int pxa2xx_spi_pci_clk_register(struct pci_dev *dev, struct ssp_device *ssp,
66 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
67 ssp->clk = clk_register_fixed_rate(&dev->dev, buf, NULL, 0, rate);
69 return PTR_ERR(ssp->clk);
71 return devm_add_action_or_reset(&dev->dev, pxa2xx_spi_pci_clk_unregister, ssp->clk);
74 static bool lpss_dma_filter(struct dma_chan *chan, void *param)
76 struct dw_dma_slave *dws = param;
78 if (dws->dma_dev != chan->device->dev)
85 static void lpss_dma_put_device(void *dma_dev)
90 static int lpss_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
92 struct ssp_device *ssp = &c->ssp;
93 struct dw_dma_slave *tx, *rx;
94 struct pci_dev *dma_dev;
97 switch (dev->device) {
98 case PCI_DEVICE_ID_INTEL_BYT:
99 ssp->type = LPSS_BYT_SSP;
101 c->tx_param = &byt_tx_param;
102 c->rx_param = &byt_rx_param;
104 case PCI_DEVICE_ID_INTEL_BSW0:
105 ssp->type = LPSS_BSW_SSP;
107 c->tx_param = &bsw0_tx_param;
108 c->rx_param = &bsw0_rx_param;
110 case PCI_DEVICE_ID_INTEL_BSW1:
111 ssp->type = LPSS_BSW_SSP;
113 c->tx_param = &bsw1_tx_param;
114 c->rx_param = &bsw1_rx_param;
116 case PCI_DEVICE_ID_INTEL_BSW2:
117 ssp->type = LPSS_BSW_SSP;
119 c->tx_param = &bsw2_tx_param;
120 c->rx_param = &bsw2_rx_param;
122 case PCI_DEVICE_ID_INTEL_LPT0_0:
123 case PCI_DEVICE_ID_INTEL_LPT1_0:
124 ssp->type = LPSS_LPT_SSP;
126 c->tx_param = &lpt0_tx_param;
127 c->rx_param = &lpt0_rx_param;
129 case PCI_DEVICE_ID_INTEL_LPT0_1:
130 case PCI_DEVICE_ID_INTEL_LPT1_1:
131 ssp->type = LPSS_LPT_SSP;
133 c->tx_param = &lpt1_tx_param;
134 c->rx_param = &lpt1_rx_param;
140 c->num_chipselect = 1;
142 ret = pxa2xx_spi_pci_clk_register(dev, ssp, 50000000);
146 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
147 ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
152 tx->dma_dev = &dma_dev->dev;
157 rx->dma_dev = &dma_dev->dev;
161 c->dma_filter = lpss_dma_filter;
162 c->dma_burst_size = 1;
167 static const struct pxa_spi_info lpss_info_config = {
168 .setup = lpss_spi_setup,
171 static int ce4100_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
173 struct ssp_device *ssp = &c->ssp;
175 ssp->type = PXA25x_SSP;
176 ssp->port_id = dev->devfn;
177 c->num_chipselect = dev->devfn;
179 return pxa2xx_spi_pci_clk_register(dev, ssp, 3686400);
182 static const struct pxa_spi_info ce4100_info_config = {
183 .setup = ce4100_spi_setup,
186 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
188 struct ssp_device *ssp = &c->ssp;
189 struct dw_dma_slave *tx, *rx;
190 struct pci_dev *dma_dev;
193 ssp->type = MRFLD_SSP;
195 switch (PCI_FUNC(dev->devfn)) {
198 c->num_chipselect = 1;
199 c->tx_param = &mrfld3_tx_param;
200 c->rx_param = &mrfld3_rx_param;
204 c->num_chipselect = 4;
205 c->tx_param = &mrfld5_tx_param;
206 c->rx_param = &mrfld5_rx_param;
210 c->num_chipselect = 1;
211 c->tx_param = &mrfld6_tx_param;
212 c->rx_param = &mrfld6_rx_param;
218 ret = pxa2xx_spi_pci_clk_register(dev, ssp, 25000000);
222 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
223 ret = devm_add_action_or_reset(&dev->dev, lpss_dma_put_device, dma_dev);
228 tx->dma_dev = &dma_dev->dev;
231 rx->dma_dev = &dma_dev->dev;
233 c->dma_filter = lpss_dma_filter;
234 c->dma_burst_size = 8;
239 static const struct pxa_spi_info mrfld_info_config = {
240 .setup = mrfld_spi_setup,
243 static int qrk_spi_setup(struct pci_dev *dev, struct pxa2xx_spi_controller *c)
245 struct ssp_device *ssp = &c->ssp;
247 ssp->type = QUARK_X1000_SSP;
248 ssp->port_id = dev->devfn;
249 c->num_chipselect = 1;
251 return pxa2xx_spi_pci_clk_register(dev, ssp, 50000000);
254 static const struct pxa_spi_info qrk_info_config = {
255 .setup = qrk_spi_setup,
258 static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
259 const struct pci_device_id *ent)
261 const struct pxa_spi_info *info;
262 struct platform_device_info pi;
264 struct platform_device *pdev;
265 struct pxa2xx_spi_controller spi_pdata;
266 struct ssp_device *ssp;
268 ret = pcim_enable_device(dev);
272 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
276 memset(&spi_pdata, 0, sizeof(spi_pdata));
278 ssp = &spi_pdata.ssp;
279 ssp->dev = &dev->dev;
280 ssp->phys_base = pci_resource_start(dev, 0);
281 ssp->mmio_base = pcim_iomap_table(dev)[0];
283 info = (struct pxa_spi_info *)ent->driver_data;
284 ret = info->setup(dev, &spi_pdata);
290 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
293 ssp->irq = pci_irq_vector(dev, 0);
295 memset(&pi, 0, sizeof(pi));
296 pi.fwnode = dev_fwnode(&dev->dev);
297 pi.parent = &dev->dev;
298 pi.name = "pxa2xx-spi";
299 pi.id = ssp->port_id;
300 pi.data = &spi_pdata;
301 pi.size_data = sizeof(spi_pdata);
303 pdev = platform_device_register_full(&pi);
305 return PTR_ERR(pdev);
307 pci_set_drvdata(dev, pdev);
312 static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
314 struct platform_device *pdev = pci_get_drvdata(dev);
316 platform_device_unregister(pdev);
319 static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
320 { PCI_DEVICE_DATA(INTEL, QUARK_X1000, &qrk_info_config) },
321 { PCI_DEVICE_DATA(INTEL, BYT, &lpss_info_config) },
322 { PCI_DEVICE_DATA(INTEL, MRFLD, &mrfld_info_config) },
323 { PCI_DEVICE_DATA(INTEL, BSW0, &lpss_info_config) },
324 { PCI_DEVICE_DATA(INTEL, BSW1, &lpss_info_config) },
325 { PCI_DEVICE_DATA(INTEL, BSW2, &lpss_info_config) },
326 { PCI_DEVICE_DATA(INTEL, CE4100, &ce4100_info_config) },
327 { PCI_DEVICE_DATA(INTEL, LPT0_0, &lpss_info_config) },
328 { PCI_DEVICE_DATA(INTEL, LPT0_1, &lpss_info_config) },
329 { PCI_DEVICE_DATA(INTEL, LPT1_0, &lpss_info_config) },
330 { PCI_DEVICE_DATA(INTEL, LPT1_1, &lpss_info_config) },
333 MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
335 static struct pci_driver pxa2xx_spi_pci_driver = {
336 .name = "pxa2xx_spi_pci",
337 .id_table = pxa2xx_spi_pci_devices,
338 .probe = pxa2xx_spi_pci_probe,
339 .remove = pxa2xx_spi_pci_remove,
342 module_pci_driver(pxa2xx_spi_pci_driver);
344 MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
345 MODULE_LICENSE("GPL v2");
346 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");