1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Copyright © 2007-2008  MontaVista Software, Inc.
10  * Author: Roy Zang <tie-fei.zang@freescale.com>
36  * fsl_lbc_addr - convert the base address
46 	struct device_node *np = fsl_lbc_ctrl_dev->dev->of_node;  in fsl_lbc_addr()
57  * fsl_lbc_find - find Localbus bank
70 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_lbc_find()
71 		return -ENODEV;  in fsl_lbc_find()
73 	lbc = fsl_lbc_ctrl_dev->regs;  in fsl_lbc_find()
74 	for (i = 0; i < ARRAY_SIZE(lbc->bank); i++) {  in fsl_lbc_find()
75 		u32 br = in_be32(&lbc->bank[i].br);  in fsl_lbc_find()
76 		u32 or = in_be32(&lbc->bank[i].or);  in fsl_lbc_find()
82 	return -ENOENT;  in fsl_lbc_find()
87  * fsl_upm_find - find pre-programmed UPM via base address
105 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_upm_find()
106 		return -ENODEV;  in fsl_upm_find()
108 	lbc = fsl_lbc_ctrl_dev->regs;  in fsl_upm_find()
109 	br = in_be32(&lbc->bank[bank].br);  in fsl_upm_find()
113 		upm->mxmr = &lbc->mamr;  in fsl_upm_find()
116 		upm->mxmr = &lbc->mbmr;  in fsl_upm_find()
119 		upm->mxmr = &lbc->mcmr;  in fsl_upm_find()
122 		return -EINVAL;  in fsl_upm_find()
127 		upm->width = 8;  in fsl_upm_find()
130 		upm->width = 16;  in fsl_upm_find()
133 		upm->width = 32;  in fsl_upm_find()
136 		return -EINVAL;  in fsl_upm_find()
144  * fsl_upm_run_pattern - actually run an UPM pattern
151  * pre-programmed AMX bits in the UPM RAM.
158 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_upm_run_pattern()
159 		return -ENODEV;  in fsl_upm_run_pattern()
163 	out_be32(&fsl_lbc_ctrl_dev->regs->mar, mar);  in fsl_upm_run_pattern()
165 	switch (upm->width) {  in fsl_upm_run_pattern()
176 		ret = -EINVAL;  in fsl_upm_run_pattern()
189 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;  in fsl_lbc_ctrl_init()
192 	setbits32(&lbc->ltesr, LTESR_CLEAR);  in fsl_lbc_ctrl_init()
193 	out_be32(&lbc->lteatr, 0);  in fsl_lbc_ctrl_init()
194 	out_be32(&lbc->ltear, 0);  in fsl_lbc_ctrl_init()
195 	out_be32(&lbc->lteccr, LTECCR_CLEAR);  in fsl_lbc_ctrl_init()
196 	out_be32(&lbc->ltedr, LTEDR_ENABLE);  in fsl_lbc_ctrl_init()
200 		clrsetbits_be32(&lbc->lbcr, LBCR_BMT, LBCR_BMTPS);  in fsl_lbc_ctrl_init()
213 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;  in fsl_lbc_ctrl_irq()
218 	status = in_be32(&lbc->ltesr);  in fsl_lbc_ctrl_irq()
224 	out_be32(&lbc->ltesr, LTESR_CLEAR);  in fsl_lbc_ctrl_irq()
225 	out_be32(&lbc->lteatr, 0);  in fsl_lbc_ctrl_irq()
226 	out_be32(&lbc->ltear, 0);  in fsl_lbc_ctrl_irq()
227 	ctrl->irq_status = status;  in fsl_lbc_ctrl_irq()
230 		dev_err(ctrl->dev, "Local bus monitor time-out: "  in fsl_lbc_ctrl_irq()
233 		dev_err(ctrl->dev, "Write protect error: "  in fsl_lbc_ctrl_irq()
236 		dev_err(ctrl->dev, "Atomic write error: "  in fsl_lbc_ctrl_irq()
239 		dev_err(ctrl->dev, "Atomic read error: "  in fsl_lbc_ctrl_irq()
242 		dev_err(ctrl->dev, "Chip select error: "  in fsl_lbc_ctrl_irq()
245 		dev_err(ctrl->dev, "FCM command time-out: "  in fsl_lbc_ctrl_irq()
248 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
251 		dev_err(ctrl->dev, "Parity or Uncorrectable ECC error: "  in fsl_lbc_ctrl_irq()
254 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
258 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
261 		dev_err(ctrl->dev, "Unknown error: "  in fsl_lbc_ctrl_irq()
281 	if (!dev->dev.of_node) {  in fsl_lbc_ctrl_probe()
282 		dev_err(&dev->dev, "Device OF-Node is NULL");  in fsl_lbc_ctrl_probe()
283 		return -EFAULT;  in fsl_lbc_ctrl_probe()
288 		return -ENOMEM;  in fsl_lbc_ctrl_probe()
290 	dev_set_drvdata(&dev->dev, fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
292 	spin_lock_init(&fsl_lbc_ctrl_dev->lock);  in fsl_lbc_ctrl_probe()
293 	init_waitqueue_head(&fsl_lbc_ctrl_dev->irq_wait);  in fsl_lbc_ctrl_probe()
295 	fsl_lbc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0);  in fsl_lbc_ctrl_probe()
296 	if (!fsl_lbc_ctrl_dev->regs) {  in fsl_lbc_ctrl_probe()
297 		dev_err(&dev->dev, "failed to get memory region\n");  in fsl_lbc_ctrl_probe()
298 		ret = -ENODEV;  in fsl_lbc_ctrl_probe()
302 	fsl_lbc_ctrl_dev->irq[0] = irq_of_parse_and_map(dev->dev.of_node, 0);  in fsl_lbc_ctrl_probe()
303 	if (!fsl_lbc_ctrl_dev->irq[0]) {  in fsl_lbc_ctrl_probe()
304 		dev_err(&dev->dev, "failed to get irq resource\n");  in fsl_lbc_ctrl_probe()
305 		ret = -ENODEV;  in fsl_lbc_ctrl_probe()
309 	fsl_lbc_ctrl_dev->dev = &dev->dev;  in fsl_lbc_ctrl_probe()
311 	ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev, dev->dev.of_node);  in fsl_lbc_ctrl_probe()
315 	ret = request_irq(fsl_lbc_ctrl_dev->irq[0], fsl_lbc_ctrl_irq, 0,  in fsl_lbc_ctrl_probe()
316 				"fsl-lbc", fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
318 		dev_err(&dev->dev, "failed to install irq (%d)\n",  in fsl_lbc_ctrl_probe()
319 			fsl_lbc_ctrl_dev->irq[0]);  in fsl_lbc_ctrl_probe()
320 		ret = fsl_lbc_ctrl_dev->irq[0];  in fsl_lbc_ctrl_probe()
324 	fsl_lbc_ctrl_dev->irq[1] = irq_of_parse_and_map(dev->dev.of_node, 1);  in fsl_lbc_ctrl_probe()
325 	if (fsl_lbc_ctrl_dev->irq[1]) {  in fsl_lbc_ctrl_probe()
326 		ret = request_irq(fsl_lbc_ctrl_dev->irq[1], fsl_lbc_ctrl_irq,  in fsl_lbc_ctrl_probe()
327 				IRQF_SHARED, "fsl-lbc-err", fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
329 			dev_err(&dev->dev, "failed to install irq (%d)\n",  in fsl_lbc_ctrl_probe()
330 					fsl_lbc_ctrl_dev->irq[1]);  in fsl_lbc_ctrl_probe()
331 			ret = fsl_lbc_ctrl_dev->irq[1];  in fsl_lbc_ctrl_probe()
337 	out_be32(&fsl_lbc_ctrl_dev->regs->lteir, LTEIR_ENABLE);  in fsl_lbc_ctrl_probe()
342 	free_irq(fsl_lbc_ctrl_dev->irq[0], fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
344 	iounmap(fsl_lbc_ctrl_dev->regs);  in fsl_lbc_ctrl_probe()
362 	lbc = ctrl->regs;  in fsl_lbc_syscore_suspend()
366 	ctrl->saved_regs = kmalloc(sizeof(struct fsl_lbc_regs), GFP_KERNEL);  in fsl_lbc_syscore_suspend()
367 	if (!ctrl->saved_regs)  in fsl_lbc_syscore_suspend()
368 		return -ENOMEM;  in fsl_lbc_syscore_suspend()
370 	_memcpy_fromio(ctrl->saved_regs, lbc, sizeof(struct fsl_lbc_regs));  in fsl_lbc_syscore_suspend()
386 	lbc = ctrl->regs;  in fsl_lbc_syscore_resume()
390 	if (ctrl->saved_regs) {  in fsl_lbc_syscore_resume()
391 		_memcpy_toio(lbc, ctrl->saved_regs,  in fsl_lbc_syscore_resume()
393 		kfree(ctrl->saved_regs);  in fsl_lbc_syscore_resume()
394 		ctrl->saved_regs = NULL;  in fsl_lbc_syscore_resume()
404 	{ .compatible = "fsl,pq3-localbus", },
405 	{ .compatible = "fsl,pq2-localbus", },
406 	{ .compatible = "fsl,pq2pro-localbus", },
419 		.name = "fsl-lbc",