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>
35  * fsl_lbc_addr - convert the base address
36  * @addr_base:	base address of the memory bank
45 	struct device_node *np = fsl_lbc_ctrl_dev->dev->of_node;  in fsl_lbc_addr()
56  * fsl_lbc_find - find Localbus bank
57  * @addr_base:	base address of the memory bank
61  * function returns bank number (starting with 0), otherwise it returns
69 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_lbc_find()
70 		return -ENODEV;  in fsl_lbc_find()
72 	lbc = fsl_lbc_ctrl_dev->regs;  in fsl_lbc_find()
73 	for (i = 0; i < ARRAY_SIZE(lbc->bank); i++) {  in fsl_lbc_find()
74 		u32 br = in_be32(&lbc->bank[i].br);  in fsl_lbc_find()
75 		u32 or = in_be32(&lbc->bank[i].or);  in fsl_lbc_find()
81 	return -ENOENT;  in fsl_lbc_find()
86  * fsl_upm_find - find pre-programmed UPM via base address
87  * @addr_base:	base address of the memory bank controlled by the UPM
96 	int bank;  in fsl_upm_find()  local
100 	bank = fsl_lbc_find(addr_base);  in fsl_upm_find()
101 	if (bank < 0)  in fsl_upm_find()
102 		return bank;  in fsl_upm_find()
104 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_upm_find()
105 		return -ENODEV;  in fsl_upm_find()
107 	lbc = fsl_lbc_ctrl_dev->regs;  in fsl_upm_find()
108 	br = in_be32(&lbc->bank[bank].br);  in fsl_upm_find()
112 		upm->mxmr = &lbc->mamr;  in fsl_upm_find()
115 		upm->mxmr = &lbc->mbmr;  in fsl_upm_find()
118 		upm->mxmr = &lbc->mcmr;  in fsl_upm_find()
121 		return -EINVAL;  in fsl_upm_find()
126 		upm->width = 8;  in fsl_upm_find()
129 		upm->width = 16;  in fsl_upm_find()
132 		upm->width = 32;  in fsl_upm_find()
135 		return -EINVAL;  in fsl_upm_find()
143  * fsl_upm_run_pattern - actually run an UPM pattern
150  * pre-programmed AMX bits in the UPM RAM.
157 	if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)  in fsl_upm_run_pattern()
158 		return -ENODEV;  in fsl_upm_run_pattern()
162 	out_be32(&fsl_lbc_ctrl_dev->regs->mar, mar);  in fsl_upm_run_pattern()
164 	switch (upm->width) {  in fsl_upm_run_pattern()
175 		ret = -EINVAL;  in fsl_upm_run_pattern()
188 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;  in fsl_lbc_ctrl_init()
191 	setbits32(&lbc->ltesr, LTESR_CLEAR);  in fsl_lbc_ctrl_init()
192 	out_be32(&lbc->lteatr, 0);  in fsl_lbc_ctrl_init()
193 	out_be32(&lbc->ltear, 0);  in fsl_lbc_ctrl_init()
194 	out_be32(&lbc->lteccr, LTECCR_CLEAR);  in fsl_lbc_ctrl_init()
195 	out_be32(&lbc->ltedr, LTEDR_ENABLE);  in fsl_lbc_ctrl_init()
199 		clrsetbits_be32(&lbc->lbcr, LBCR_BMT, LBCR_BMTPS);  in fsl_lbc_ctrl_init()
212 	struct fsl_lbc_regs __iomem *lbc = ctrl->regs;  in fsl_lbc_ctrl_irq()
217 	status = in_be32(&lbc->ltesr);  in fsl_lbc_ctrl_irq()
223 	out_be32(&lbc->ltesr, LTESR_CLEAR);  in fsl_lbc_ctrl_irq()
224 	out_be32(&lbc->lteatr, 0);  in fsl_lbc_ctrl_irq()
225 	out_be32(&lbc->ltear, 0);  in fsl_lbc_ctrl_irq()
226 	ctrl->irq_status = status;  in fsl_lbc_ctrl_irq()
229 		dev_err(ctrl->dev, "Local bus monitor time-out: "  in fsl_lbc_ctrl_irq()
232 		dev_err(ctrl->dev, "Write protect error: "  in fsl_lbc_ctrl_irq()
235 		dev_err(ctrl->dev, "Atomic write error: "  in fsl_lbc_ctrl_irq()
238 		dev_err(ctrl->dev, "Atomic read error: "  in fsl_lbc_ctrl_irq()
241 		dev_err(ctrl->dev, "Chip select error: "  in fsl_lbc_ctrl_irq()
244 		dev_err(ctrl->dev, "FCM command time-out: "  in fsl_lbc_ctrl_irq()
247 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
250 		dev_err(ctrl->dev, "Parity or Uncorrectable ECC error: "  in fsl_lbc_ctrl_irq()
253 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
257 		wake_up(&ctrl->irq_wait);  in fsl_lbc_ctrl_irq()
260 		dev_err(ctrl->dev, "Unknown error: "  in fsl_lbc_ctrl_irq()
280 	if (!dev->dev.of_node) {  in fsl_lbc_ctrl_probe()
281 		dev_err(&dev->dev, "Device OF-Node is NULL");  in fsl_lbc_ctrl_probe()
282 		return -EFAULT;  in fsl_lbc_ctrl_probe()
287 		return -ENOMEM;  in fsl_lbc_ctrl_probe()
289 	dev_set_drvdata(&dev->dev, fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
291 	spin_lock_init(&fsl_lbc_ctrl_dev->lock);  in fsl_lbc_ctrl_probe()
292 	init_waitqueue_head(&fsl_lbc_ctrl_dev->irq_wait);  in fsl_lbc_ctrl_probe()
294 	fsl_lbc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0);  in fsl_lbc_ctrl_probe()
295 	if (!fsl_lbc_ctrl_dev->regs) {  in fsl_lbc_ctrl_probe()
296 		dev_err(&dev->dev, "failed to get memory region\n");  in fsl_lbc_ctrl_probe()
297 		ret = -ENODEV;  in fsl_lbc_ctrl_probe()
301 	fsl_lbc_ctrl_dev->irq[0] = irq_of_parse_and_map(dev->dev.of_node, 0);  in fsl_lbc_ctrl_probe()
302 	if (!fsl_lbc_ctrl_dev->irq[0]) {  in fsl_lbc_ctrl_probe()
303 		dev_err(&dev->dev, "failed to get irq resource\n");  in fsl_lbc_ctrl_probe()
304 		ret = -ENODEV;  in fsl_lbc_ctrl_probe()
308 	fsl_lbc_ctrl_dev->dev = &dev->dev;  in fsl_lbc_ctrl_probe()
310 	ret = fsl_lbc_ctrl_init(fsl_lbc_ctrl_dev, dev->dev.of_node);  in fsl_lbc_ctrl_probe()
314 	ret = request_irq(fsl_lbc_ctrl_dev->irq[0], fsl_lbc_ctrl_irq, 0,  in fsl_lbc_ctrl_probe()
315 				"fsl-lbc", fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
317 		dev_err(&dev->dev, "failed to install irq (%d)\n",  in fsl_lbc_ctrl_probe()
318 			fsl_lbc_ctrl_dev->irq[0]);  in fsl_lbc_ctrl_probe()
319 		ret = fsl_lbc_ctrl_dev->irq[0];  in fsl_lbc_ctrl_probe()
323 	fsl_lbc_ctrl_dev->irq[1] = irq_of_parse_and_map(dev->dev.of_node, 1);  in fsl_lbc_ctrl_probe()
324 	if (fsl_lbc_ctrl_dev->irq[1]) {  in fsl_lbc_ctrl_probe()
325 		ret = request_irq(fsl_lbc_ctrl_dev->irq[1], fsl_lbc_ctrl_irq,  in fsl_lbc_ctrl_probe()
326 				IRQF_SHARED, "fsl-lbc-err", fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
328 			dev_err(&dev->dev, "failed to install irq (%d)\n",  in fsl_lbc_ctrl_probe()
329 					fsl_lbc_ctrl_dev->irq[1]);  in fsl_lbc_ctrl_probe()
330 			ret = fsl_lbc_ctrl_dev->irq[1];  in fsl_lbc_ctrl_probe()
336 	out_be32(&fsl_lbc_ctrl_dev->regs->lteir, LTEIR_ENABLE);  in fsl_lbc_ctrl_probe()
341 	free_irq(fsl_lbc_ctrl_dev->irq[0], fsl_lbc_ctrl_dev);  in fsl_lbc_ctrl_probe()
343 	iounmap(fsl_lbc_ctrl_dev->regs);  in fsl_lbc_ctrl_probe()
361 	lbc = ctrl->regs;  in fsl_lbc_syscore_suspend()
365 	ctrl->saved_regs = kmalloc(sizeof(struct fsl_lbc_regs), GFP_KERNEL);  in fsl_lbc_syscore_suspend()
366 	if (!ctrl->saved_regs)  in fsl_lbc_syscore_suspend()
367 		return -ENOMEM;  in fsl_lbc_syscore_suspend()
369 	_memcpy_fromio(ctrl->saved_regs, lbc, sizeof(struct fsl_lbc_regs));  in fsl_lbc_syscore_suspend()
385 	lbc = ctrl->regs;  in fsl_lbc_syscore_resume()
389 	if (ctrl->saved_regs) {  in fsl_lbc_syscore_resume()
390 		_memcpy_toio(lbc, ctrl->saved_regs,  in fsl_lbc_syscore_resume()
392 		kfree(ctrl->saved_regs);  in fsl_lbc_syscore_resume()
393 		ctrl->saved_regs = NULL;  in fsl_lbc_syscore_resume()
403 	{ .compatible = "fsl,pq3-localbus", },
404 	{ .compatible = "fsl,pq2-localbus", },
405 	{ .compatible = "fsl,pq2pro-localbus", },
418 		.name = "fsl-lbc",