char/ipmi/kcs_bmc_aspeed.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2015-2018, Intel Corporation.
6 #define pr_fmt(fmt) "aspeed-kcs-bmc: " fmt
26 #define DEVICE_NAME     "ast-kcs-bmc"
30 /* mapped to lpc-bmc@0 IO space */
56 /* mapped to lpc-host@80 IO space */
66 	struct regmap *map;  member
74 	int rc;  in aspeed_kcs_inb()  local
76 	rc = regmap_read(priv->map, reg, &val);  in aspeed_kcs_inb()
77 	WARN(rc != 0, "regmap_read() failed: %d\n", rc);  in aspeed_kcs_inb()
79 	return rc == 0 ? (u8) val : 0;  in aspeed_kcs_inb()
85 	int rc;  in aspeed_kcs_outb()  local
87 	rc = regmap_write(priv->map, reg, data);  in aspeed_kcs_outb()
88 	WARN(rc != 0, "regmap_write() failed: %d\n", rc);  in aspeed_kcs_outb()
109 	switch (kcs_bmc->channel) {  in aspeed_kcs_set_address()
111 		regmap_update_bits(priv->map, LPC_HICR4,  in aspeed_kcs_set_address()
113 		regmap_write(priv->map, LPC_LADR12H, addr >> 8);  in aspeed_kcs_set_address()
114 		regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);  in aspeed_kcs_set_address()
118 		regmap_update_bits(priv->map, LPC_HICR4,  in aspeed_kcs_set_address()
120 		regmap_write(priv->map, LPC_LADR12H, addr >> 8);  in aspeed_kcs_set_address()
121 		regmap_write(priv->map, LPC_LADR12L, addr & 0xFF);  in aspeed_kcs_set_address()
125 		regmap_write(priv->map, LPC_LADR3H, addr >> 8);  in aspeed_kcs_set_address()
126 		regmap_write(priv->map, LPC_LADR3L, addr & 0xFF);  in aspeed_kcs_set_address()
130 		regmap_write(priv->map, LPC_LADR4, ((addr + 1) << 16) |  in aspeed_kcs_set_address()
143 	switch (kcs_bmc->channel) {  in aspeed_kcs_enable_channel()
146 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
148 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
151 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
153 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
160 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
162 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
165 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
167 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
174 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
176 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
178 			regmap_update_bits(priv->map, LPC_HICR4,  in aspeed_kcs_enable_channel()
181 			regmap_update_bits(priv->map, LPC_HICR0,  in aspeed_kcs_enable_channel()
183 			regmap_update_bits(priv->map, LPC_HICR4,  in aspeed_kcs_enable_channel()
185 			regmap_update_bits(priv->map, LPC_HICR2,  in aspeed_kcs_enable_channel()
192 			regmap_update_bits(priv->map, LPC_HICRB,  in aspeed_kcs_enable_channel()
196 			regmap_update_bits(priv->map, LPC_HICRB,  in aspeed_kcs_enable_channel()
219 	struct device *dev = &pdev->dev;  in aspeed_kcs_config_irq()
244 	int rc;  in aspeed_kcs_probe_of_v1()  local
246 	np = pdev->dev.of_node;  in aspeed_kcs_probe_of_v1()
248 	rc = of_property_read_u32(np, "kcs_chan", &channel);  in aspeed_kcs_probe_of_v1()
249 	if ((rc != 0) || (channel == 0 || channel > KCS_CHANNEL_MAX)) {  in aspeed_kcs_probe_of_v1()
250 		dev_err(&pdev->dev, "no valid 'kcs_chan' configured\n");  in aspeed_kcs_probe_of_v1()
251 		return ERR_PTR(-EINVAL);  in aspeed_kcs_probe_of_v1()
254 	kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel);  in aspeed_kcs_probe_of_v1()
256 		return ERR_PTR(-ENOMEM);  in aspeed_kcs_probe_of_v1()
259 	priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node);  in aspeed_kcs_probe_of_v1()
260 	if (IS_ERR(priv->map)) {  in aspeed_kcs_probe_of_v1()
261 		dev_err(&pdev->dev, "Couldn't get regmap\n");  in aspeed_kcs_probe_of_v1()
262 		return ERR_PTR(-ENODEV);  in aspeed_kcs_probe_of_v1()
265 	rc = of_property_read_u32(np, "kcs_addr", &slave);  in aspeed_kcs_probe_of_v1()
266 	if (rc) {  in aspeed_kcs_probe_of_v1()
267 		dev_err(&pdev->dev, "no valid 'kcs_addr' configured\n");  in aspeed_kcs_probe_of_v1()
268 		return ERR_PTR(-EINVAL);  in aspeed_kcs_probe_of_v1()
271 	kcs->ioreg = ast_kcs_bmc_ioregs[channel - 1];  in aspeed_kcs_probe_of_v1()
286 	return -EINVAL;  in aspeed_kcs_calculate_channel()
298 	int rc;  in aspeed_kcs_probe_of_v2()  local
300 	np = pdev->dev.of_node;  in aspeed_kcs_probe_of_v2()
305 		return ERR_PTR(-EINVAL);  in aspeed_kcs_probe_of_v2()
310 		return ERR_PTR(-EINVAL);  in aspeed_kcs_probe_of_v2()
315 		return ERR_PTR(-EINVAL);  in aspeed_kcs_probe_of_v2()
322 	kcs = kcs_bmc_alloc(&pdev->dev, sizeof(struct aspeed_kcs_bmc), channel);  in aspeed_kcs_probe_of_v2()
324 		return ERR_PTR(-ENOMEM);  in aspeed_kcs_probe_of_v2()
326 	kcs->ioreg = ioreg;  in aspeed_kcs_probe_of_v2()
329 	priv->map = syscon_node_to_regmap(pdev->dev.parent->of_node);  in aspeed_kcs_probe_of_v2()
330 	if (IS_ERR(priv->map)) {  in aspeed_kcs_probe_of_v2()
331 		dev_err(&pdev->dev, "Couldn't get regmap\n");  in aspeed_kcs_probe_of_v2()
332 		return ERR_PTR(-ENODEV);  in aspeed_kcs_probe_of_v2()
335 	rc = of_property_read_u32(np, "aspeed,lpc-io-reg", &slave);  in aspeed_kcs_probe_of_v2()
336 	if (rc)  in aspeed_kcs_probe_of_v2()
337 		return ERR_PTR(rc);  in aspeed_kcs_probe_of_v2()
346 	struct device *dev = &pdev->dev;  in aspeed_kcs_probe()
349 	int rc;  in aspeed_kcs_probe()  local
351 	np = pdev->dev.of_node;  in aspeed_kcs_probe()
352 	if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc") ||  in aspeed_kcs_probe()
353 			of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc"))  in aspeed_kcs_probe()
355 	else if (of_device_is_compatible(np, "aspeed,ast2400-kcs-bmc-v2") ||  in aspeed_kcs_probe()
356 			of_device_is_compatible(np, "aspeed,ast2500-kcs-bmc-v2"))  in aspeed_kcs_probe()
359 		return -EINVAL;  in aspeed_kcs_probe()
364 	kcs_bmc->io_inputb = aspeed_kcs_inb;  in aspeed_kcs_probe()
365 	kcs_bmc->io_outputb = aspeed_kcs_outb;  in aspeed_kcs_probe()
367 	rc = aspeed_kcs_config_irq(kcs_bmc, pdev);  in aspeed_kcs_probe()
368 	if (rc)  in aspeed_kcs_probe()
369 		return rc;  in aspeed_kcs_probe()
375 	rc = misc_register(&kcs_bmc->miscdev);  in aspeed_kcs_probe()
376 	if (rc) {  in aspeed_kcs_probe()
378 		return rc;  in aspeed_kcs_probe()
381 	dev_dbg(&pdev->dev,  in aspeed_kcs_probe()
383 		kcs_bmc->channel, kcs_bmc->ioreg.idr, kcs_bmc->ioreg.odr,  in aspeed_kcs_probe()
384 		kcs_bmc->ioreg.str);  in aspeed_kcs_probe()
391 	struct kcs_bmc *kcs_bmc = dev_get_drvdata(&pdev->dev);  in aspeed_kcs_remove()
393 	misc_deregister(&kcs_bmc->miscdev);  in aspeed_kcs_remove()
399 	{ .compatible = "aspeed,ast2400-kcs-bmc" },
400 	{ .compatible = "aspeed,ast2500-kcs-bmc" },
401 	{ .compatible = "aspeed,ast2400-kcs-bmc-v2" },
402 	{ .compatible = "aspeed,ast2500-kcs-bmc-v2" },
409 		.name           = DEVICE_NAME,