1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright (C) 2011-2013 One Laptop Per Child
19  * The OLPC XO-1.75 and XO-4 laptops do not have a hardware PS/2 controller.
20  * Instead, the OLPC firmware runs a bit-banging PS/2 implementation on an
21  * otherwise-unused slow processor which is included in the Marvell MMP2/MMP3
74 	struct olpc_apsp *priv = port->port_data;  in olpc_apsp_write()
78 	if (port == priv->padio)  in olpc_apsp_write()
83 	dev_dbg(priv->dev, "olpc_apsp_write which=%x val=%x\n", which, val);  in olpc_apsp_write()
85 		u32 sts = readl(priv->base + COMMAND_FIFO_STATUS);  in olpc_apsp_write()
88 			       priv->base + SECURE_PROCESSOR_COMMAND);  in olpc_apsp_write()
95 	dev_dbg(priv->dev, "olpc_apsp_write timeout, status=%x\n",  in olpc_apsp_write()
96 		readl(priv->base + COMMAND_FIFO_STATUS));  in olpc_apsp_write()
98 	return -ETIMEDOUT;  in olpc_apsp_write()
111 	tmp = readl(priv->base + PJ_RST_INTERRUPT);  in olpc_apsp_rx()
113 		dev_warn(priv->dev, "spurious interrupt?\n");  in olpc_apsp_rx()
117 	w = readl(priv->base + COMMAND_RETURN_STATUS);  in olpc_apsp_rx()
118 	dev_dbg(priv->dev, "olpc_apsp_rx %x\n", w);  in olpc_apsp_rx()
121 		serio = priv->kbio;  in olpc_apsp_rx()
123 		serio = priv->padio;  in olpc_apsp_rx()
128 	writel(tmp | SP_COMMAND_COMPLETE_RESET, priv->base + PJ_RST_INTERRUPT);  in olpc_apsp_rx()
129 	writel(PORT_MASK, priv->base + SECURE_PROCESSOR_COMMAND);  in olpc_apsp_rx()
131 	pm_wakeup_event(priv->dev, 1000);  in olpc_apsp_rx()
137 	struct olpc_apsp *priv = port->port_data;  in olpc_apsp_open()
141 	if (priv->open_count++ == 0) {  in olpc_apsp_open()
142 		l = readl(priv->base + COMMAND_FIFO_STATUS);  in olpc_apsp_open()
144 			dev_err(priv->dev, "SP cannot accept commands.\n");  in olpc_apsp_open()
145 			return -EIO;  in olpc_apsp_open()
148 		/* Enable interrupt 0 by clearing its bit */  in olpc_apsp_open()
149 		tmp = readl(priv->base + PJ_INTERRUPT_MASK);  in olpc_apsp_open()
150 		writel(tmp & ~INT_0, priv->base + PJ_INTERRUPT_MASK);  in olpc_apsp_open()
158 	struct olpc_apsp *priv = port->port_data;  in olpc_apsp_close()
161 	if (--priv->open_count == 0) {  in olpc_apsp_close()
163 		tmp = readl(priv->base + PJ_INTERRUPT_MASK);  in olpc_apsp_close()
164 		writel(tmp | INT_0, priv->base + PJ_INTERRUPT_MASK);  in olpc_apsp_close()
175 	priv = devm_kzalloc(&pdev->dev, sizeof(struct olpc_apsp), GFP_KERNEL);  in olpc_apsp_probe()
177 		return -ENOMEM;  in olpc_apsp_probe()
179 	priv->dev = &pdev->dev;  in olpc_apsp_probe()
182 	priv->base = devm_ioremap_resource(&pdev->dev, res);  in olpc_apsp_probe()
183 	if (IS_ERR(priv->base)) {  in olpc_apsp_probe()
184 		dev_err(&pdev->dev, "Failed to map WTM registers\n");  in olpc_apsp_probe()
185 		return PTR_ERR(priv->base);  in olpc_apsp_probe()
188 	priv->irq = platform_get_irq(pdev, 0);  in olpc_apsp_probe()
189 	if (priv->irq < 0)  in olpc_apsp_probe()
190 		return priv->irq;  in olpc_apsp_probe()
195 		return -ENOMEM;  in olpc_apsp_probe()
196 	kb_serio->id.type	= SERIO_8042_XL;  in olpc_apsp_probe()
197 	kb_serio->write		= olpc_apsp_write;  in olpc_apsp_probe()
198 	kb_serio->open		= olpc_apsp_open;  in olpc_apsp_probe()
199 	kb_serio->close		= olpc_apsp_close;  in olpc_apsp_probe()
200 	kb_serio->port_data	= priv;  in olpc_apsp_probe()
201 	kb_serio->dev.parent	= &pdev->dev;  in olpc_apsp_probe()
202 	strlcpy(kb_serio->name, "sp keyboard", sizeof(kb_serio->name));  in olpc_apsp_probe()
203 	strlcpy(kb_serio->phys, "sp/serio0", sizeof(kb_serio->phys));  in olpc_apsp_probe()
204 	priv->kbio		= kb_serio;  in olpc_apsp_probe()
210 		error = -ENOMEM;  in olpc_apsp_probe()
213 	pad_serio->id.type	= SERIO_8042;  in olpc_apsp_probe()
214 	pad_serio->write	= olpc_apsp_write;  in olpc_apsp_probe()
215 	pad_serio->open		= olpc_apsp_open;  in olpc_apsp_probe()
216 	pad_serio->close	= olpc_apsp_close;  in olpc_apsp_probe()
217 	pad_serio->port_data	= priv;  in olpc_apsp_probe()
218 	pad_serio->dev.parent	= &pdev->dev;  in olpc_apsp_probe()
219 	strlcpy(pad_serio->name, "sp touchpad", sizeof(pad_serio->name));  in olpc_apsp_probe()
220 	strlcpy(pad_serio->phys, "sp/serio1", sizeof(pad_serio->phys));  in olpc_apsp_probe()
221 	priv->padio		= pad_serio;  in olpc_apsp_probe()
224 	error = request_irq(priv->irq, olpc_apsp_rx, 0, "olpc-apsp", priv);  in olpc_apsp_probe()
226 		dev_err(&pdev->dev, "Failed to request IRQ\n");  in olpc_apsp_probe()
230 	device_init_wakeup(priv->dev, 1);  in olpc_apsp_probe()
233 	dev_dbg(&pdev->dev, "probed successfully.\n");  in olpc_apsp_probe()
247 	free_irq(priv->irq, priv);  in olpc_apsp_remove()
249 	serio_unregister_port(priv->kbio);  in olpc_apsp_remove()
250 	serio_unregister_port(priv->padio);  in olpc_apsp_remove()
256 	{ .compatible = "olpc,ap-sp", },
265 		.name	= "olpc-apsp",
270 MODULE_DESCRIPTION("OLPC AP-SP serio driver");