1 // SPDX-License-Identifier: GPL-2.0-only
3  * Technologic Systems TS-73xx SBC FPGA loader
7  * FPGA Manager Driver for the on-board Altera Cyclone II FPGA found on
8  * TS-7300, heavily based on load_fpga.c in their vendor tree.
17 #include <linux/fpga/fpga-mgr.h>
35 static enum fpga_mgr_states ts73xx_fpga_state(struct fpga_manager *mgr)  in ts73xx_fpga_state()  argument
40 static int ts73xx_fpga_write_init(struct fpga_manager *mgr,  in ts73xx_fpga_write_init()  argument
44 	struct ts73xx_fpga_priv *priv = mgr->priv;  in ts73xx_fpga_write_init()
46 	/* Reset the FPGA */  in ts73xx_fpga_write_init()
47 	writeb(0, priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_init()
49 	writeb(TS73XX_FPGA_RESET, priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_init()
55 static int ts73xx_fpga_write(struct fpga_manager *mgr, const char *buf,  in ts73xx_fpga_write()  argument
58 	struct ts73xx_fpga_priv *priv = mgr->priv;  in ts73xx_fpga_write()
63 	while (count--) {  in ts73xx_fpga_write()
64 		ret = readb_poll_timeout(priv->io_base + TS73XX_FPGA_CONFIG_REG,  in ts73xx_fpga_write()
70 		writeb(buf[i], priv->io_base + TS73XX_FPGA_DATA_REG);  in ts73xx_fpga_write()
77 static int ts73xx_fpga_write_complete(struct fpga_manager *mgr,  in ts73xx_fpga_write_complete()  argument
80 	struct ts73xx_fpga_priv *priv = mgr->priv;  in ts73xx_fpga_write_complete()
84 	reg = readb(priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_complete()
86 	writeb(reg, priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_complete()
89 	reg = readb(priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_complete()
91 	writeb(reg, priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_complete()
93 	reg = readb(priv->io_base + TS73XX_FPGA_CONFIG_REG);  in ts73xx_fpga_write_complete()
95 		return -ETIMEDOUT;  in ts73xx_fpga_write_complete()
109 	struct device *kdev = &pdev->dev;  in ts73xx_fpga_probe()
111 	struct fpga_manager *mgr;  in ts73xx_fpga_probe()  local
116 		return -ENOMEM;  in ts73xx_fpga_probe()
118 	priv->dev = kdev;  in ts73xx_fpga_probe()
121 	priv->io_base = devm_ioremap_resource(kdev, res);  in ts73xx_fpga_probe()
122 	if (IS_ERR(priv->io_base))  in ts73xx_fpga_probe()
123 		return PTR_ERR(priv->io_base);  in ts73xx_fpga_probe()
125 	mgr = devm_fpga_mgr_create(kdev, "TS-73xx FPGA Manager",  in ts73xx_fpga_probe()
127 	if (!mgr)  in ts73xx_fpga_probe()
128 		return -ENOMEM;  in ts73xx_fpga_probe()
130 	platform_set_drvdata(pdev, mgr);  in ts73xx_fpga_probe()
132 	return fpga_mgr_register(mgr);  in ts73xx_fpga_probe()
137 	struct fpga_manager *mgr = platform_get_drvdata(pdev);  in ts73xx_fpga_remove()  local
139 	fpga_mgr_unregister(mgr);  in ts73xx_fpga_remove()
146 		.name	= "ts73xx-fpga-mgr",
154 MODULE_DESCRIPTION("TS-73xx FPGA Manager driver");