1 // SPDX-License-Identifier: GPL-2.0
3  * CPM serial console support.
113 	out_be16(&smc->smcmr, in_be16(&smc->smcmr) & ~3);  in smc_disable_port()
119 	out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) & ~0x30);  in scc_disable_port()
124 	out_be16(&smc->smcmr, in_be16(&smc->smcmr) | 3);  in smc_enable_port()
130 	out_be32(&scc->gsmrl, in_be32(&scc->gsmrl) | 0x30);  in scc_enable_port()
138 	out_8(&param->rfcr, 0x10);  in cpm_serial_open()
139 	out_8(&param->tfcr, 0x10);  in cpm_serial_open()
140 	out_be16(&param->mrblr, 1);  in cpm_serial_open()
141 	out_be16(&param->maxidl, 0);  in cpm_serial_open()
142 	out_be16(&param->brkec, 0);  in cpm_serial_open()
143 	out_be16(&param->brkln, 0);  in cpm_serial_open()
144 	out_be16(&param->brkcr, 0);  in cpm_serial_open()
147 	rbdf->addr = (u8 *)rbdf - 1;  in cpm_serial_open()
148 	rbdf->sc = 0xa000;  in cpm_serial_open()
149 	rbdf->len = 1;  in cpm_serial_open()
152 	tbdf->addr = (u8 *)rbdf - 2;  in cpm_serial_open()
153 	tbdf->sc = 0x2000;  in cpm_serial_open()
154 	tbdf->len = 1;  in cpm_serial_open()
157 	out_be16(&param->rbase, cbd_offset);  in cpm_serial_open()
158 	out_be16(&param->tbase, cbd_offset + sizeof(struct cpm_bd));  in cpm_serial_open()
168 	while (tbdf->sc & 0x8000)  in cpm_serial_putc()
173 	tbdf->addr[0] = c;  in cpm_serial_putc()
175 	tbdf->sc |= 0x8000;  in cpm_serial_putc()
181 	return !(rbdf->sc & 0x8000);  in cpm_serial_tstc()
192 	c = rbdf->addr[0];  in cpm_serial_getc()
194 	rbdf->sc |= 0x8000;  in cpm_serial_getc()
204 	void *parent, *muram;  in cpm_console_init()  local
208 	if (dt_is_compatible(devp, "fsl,cpm1-smc-uart")) {  in cpm_console_init()
210 	} else if (dt_is_compatible(devp, "fsl,cpm2-scc-uart")) {  in cpm_console_init()
212 	} else if (dt_is_compatible(devp, "fsl,cpm2-smc-uart")) {  in cpm_console_init()
230 	if (getprop(devp, "fsl,cpm-command", &cpm_cmd, 4) < 4)  in cpm_console_init()
231 		return -1;  in cpm_console_init()
234 		return -1;  in cpm_console_init()
245 		return -1;  in cpm_console_init()
248 		return -1;  in cpm_console_init()
250 	muram = finddevice("/soc/cpm/muram/data");  in cpm_console_init()
251 	if (!muram)  in cpm_console_init()
252 		return -1;  in cpm_console_init()
254 	/* For bootwrapper-compatible device trees, we assume that the first  in cpm_console_init()
255 	 * entry has at least 128 bytes, and that #address-cells/#data-cells  in cpm_console_init()
259 	if (dt_get_virtual_reg(muram, &muram_addr, 1) < 1)  in cpm_console_init()
260 		return -1;  in cpm_console_init()
262 	if (getprop(muram, "reg", reg, 8) < 8)  in cpm_console_init()
263 		return -1;  in cpm_console_init()
268 	/* Store the buffer descriptors at the end of the first muram chunk.  in cpm_console_init()
269 	 * For SMC ports on CPM2-based platforms, relocate the parameter RAM  in cpm_console_init()
273 	cbd_offset = muram_offset + muram_size - 2 * sizeof(struct cpm_bd);  in cpm_console_init()
279 		pram_offset = cbd_offset - 64;  in cpm_console_init()
284 		param = muram_addr - muram_offset + pram_offset;  in cpm_console_init()
287 	cbd_addr = muram_addr - muram_offset + cbd_offset;  in cpm_console_init()
289 	scdp->open = cpm_serial_open;  in cpm_console_init()
290 	scdp->putc = cpm_serial_putc;  in cpm_console_init()
291 	scdp->getc = cpm_serial_getc;  in cpm_console_init()
292 	scdp->tstc = cpm_serial_tstc;  in cpm_console_init()