1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) 2006-2010, 2012-2013 Freescale Semiconductor, Inc.
4  * All rights reserved.
5  *
6  * Author: Andy Fleming <afleming@freescale.com>
7  *
8  * Based on 83xx/mpc8360e_pb.c by:
9  *	   Li Yang <LeoLi@freescale.com>
10  *	   Yin Olivia <Hong-hua.Yin@freescale.com>
11  *
12  * Description:
13  * MPC85xx MDS board specific routines.
14  */
15 
16 #include <linux/stddef.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/reboot.h>
21 #include <linux/pci.h>
22 #include <linux/kdev_t.h>
23 #include <linux/major.h>
24 #include <linux/console.h>
25 #include <linux/delay.h>
26 #include <linux/seq_file.h>
27 #include <linux/initrd.h>
28 #include <linux/fsl_devices.h>
29 #include <linux/of_platform.h>
30 #include <linux/of_device.h>
31 #include <linux/phy.h>
32 #include <linux/memblock.h>
33 #include <linux/fsl/guts.h>
34 
35 #include <linux/atomic.h>
36 #include <asm/time.h>
37 #include <asm/io.h>
38 #include <asm/machdep.h>
39 #include <asm/pci-bridge.h>
40 #include <asm/irq.h>
41 #include <mm/mmu_decl.h>
42 #include <asm/udbg.h>
43 #include <sysdev/fsl_soc.h>
44 #include <sysdev/fsl_pci.h>
45 #include <soc/fsl/qe/qe.h>
46 #include <asm/mpic.h>
47 #include <asm/swiotlb.h>
48 #include "smp.h"
49 
50 #include "mpc85xx.h"
51 
52 #if IS_BUILTIN(CONFIG_PHYLIB)
53 
54 #define MV88E1111_SCR	0x10
55 #define MV88E1111_SCR_125CLK	0x0010
56 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
57 {
58 	int scr;
59 	int err;
60 
61 	/* Workaround for the 125 CLK Toggle */
62 	scr = phy_read(phydev, MV88E1111_SCR);
63 
64 	if (scr < 0)
65 		return scr;
66 
67 	err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
68 
69 	if (err)
70 		return err;
71 
72 	err = phy_write(phydev, MII_BMCR, BMCR_RESET);
73 
74 	if (err)
75 		return err;
76 
77 	scr = phy_read(phydev, MV88E1111_SCR);
78 
79 	if (scr < 0)
80 		return scr;
81 
82 	err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
83 
84 	return err;
85 }
86 
87 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
88 {
89 	int temp;
90 	int err;
91 
92 	/* Errata */
93 	err = phy_write(phydev,29, 0x0006);
94 
95 	if (err)
96 		return err;
97 
98 	temp = phy_read(phydev, 30);
99 
100 	if (temp < 0)
101 		return temp;
102 
103 	temp = (temp & (~0x8000)) | 0x4000;
104 	err = phy_write(phydev,30, temp);
105 
106 	if (err)
107 		return err;
108 
109 	err = phy_write(phydev,29, 0x000a);
110 
111 	if (err)
112 		return err;
113 
114 	temp = phy_read(phydev, 30);
115 
116 	if (temp < 0)
117 		return temp;
118 
119 	temp = phy_read(phydev, 30);
120 
121 	if (temp < 0)
122 		return temp;
123 
124 	temp &= ~0x0020;
125 
126 	err = phy_write(phydev,30,temp);
127 
128 	if (err)
129 		return err;
130 
131 	/* Disable automatic MDI/MDIX selection */
132 	temp = phy_read(phydev, 16);
133 
134 	if (temp < 0)
135 		return temp;
136 
137 	temp &= ~0x0060;
138 	err = phy_write(phydev,16,temp);
139 
140 	return err;
141 }
142 
143 #endif
144 
145 /* ************************************************************************
146  *
147  * Setup the architecture
148  *
149  */
150 #ifdef CONFIG_QUICC_ENGINE
151 static void __init mpc85xx_mds_reset_ucc_phys(void)
152 {
153 	struct device_node *np;
154 	static u8 __iomem *bcsr_regs;
155 
156 	/* Map BCSR area */
157 	np = of_find_node_by_name(NULL, "bcsr");
158 	if (!np)
159 		return;
160 
161 	bcsr_regs = of_iomap(np, 0);
162 	of_node_put(np);
163 	if (!bcsr_regs)
164 		return;
165 
166 	if (machine_is(mpc8568_mds)) {
167 #define BCSR_UCC1_GETH_EN	(0x1 << 7)
168 #define BCSR_UCC2_GETH_EN	(0x1 << 7)
169 #define BCSR_UCC1_MODE_MSK	(0x3 << 4)
170 #define BCSR_UCC2_MODE_MSK	(0x3 << 0)
171 
172 		/* Turn off UCC1 & UCC2 */
173 		clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
174 		clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
175 
176 		/* Mode is RGMII, all bits clear */
177 		clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
178 					 BCSR_UCC2_MODE_MSK);
179 
180 		/* Turn UCC1 & UCC2 on */
181 		setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
182 		setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
183 	} else if (machine_is(mpc8569_mds)) {
184 #define BCSR7_UCC12_GETHnRST	(0x1 << 2)
185 #define BCSR8_UEM_MARVELL_RST	(0x1 << 1)
186 #define BCSR_UCC_RGMII		(0x1 << 6)
187 #define BCSR_UCC_RTBI		(0x1 << 5)
188 		/*
189 		 * U-Boot mangles interrupt polarity for Marvell PHYs,
190 		 * so reset built-in and UEM Marvell PHYs, this puts
191 		 * the PHYs into their normal state.
192 		 */
193 		clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
194 		setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
195 
196 		setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
197 		clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
198 
199 		for_each_compatible_node(np, "network", "ucc_geth") {
200 			const unsigned int *prop;
201 			int ucc_num;
202 
203 			prop = of_get_property(np, "cell-index", NULL);
204 			if (prop == NULL)
205 				continue;
206 
207 			ucc_num = *prop - 1;
208 
209 			prop = of_get_property(np, "phy-connection-type", NULL);
210 			if (prop == NULL)
211 				continue;
212 
213 			if (strcmp("rtbi", (const char *)prop) == 0)
214 				clrsetbits_8(&bcsr_regs[7 + ucc_num],
215 					BCSR_UCC_RGMII, BCSR_UCC_RTBI);
216 		}
217 	} else if (machine_is(p1021_mds)) {
218 #define BCSR11_ENET_MICRST     (0x1 << 5)
219 		/* Reset Micrel PHY */
220 		clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
221 		setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
222 	}
223 
224 	iounmap(bcsr_regs);
225 }
226 
227 static void __init mpc85xx_mds_qe_init(void)
228 {
229 	struct device_node *np;
230 
231 	mpc85xx_qe_par_io_init();
232 	mpc85xx_mds_reset_ucc_phys();
233 
234 	if (machine_is(p1021_mds)) {
235 
236 		struct ccsr_guts __iomem *guts;
237 
238 		np = of_find_node_by_name(NULL, "global-utilities");
239 		if (np) {
240 			guts = of_iomap(np, 0);
241 			if (!guts)
242 				pr_err("mpc85xx-rdb: could not map global utilities register\n");
243 			else{
244 			/* P1021 has pins muxed for QE and other functions. To
245 			 * enable QE UEC mode, we need to set bit QE0 for UCC1
246 			 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
247 			 * and QE12 for QE MII management signals in PMUXCR
248 			 * register.
249 			 */
250 				setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
251 						  MPC85xx_PMUXCR_QE(3) |
252 						  MPC85xx_PMUXCR_QE(9) |
253 						  MPC85xx_PMUXCR_QE(12));
254 				iounmap(guts);
255 			}
256 			of_node_put(np);
257 		}
258 
259 	}
260 }
261 
262 #else
263 static void __init mpc85xx_mds_qe_init(void) { }
264 #endif	/* CONFIG_QUICC_ENGINE */
265 
266 static void __init mpc85xx_mds_setup_arch(void)
267 {
268 	if (ppc_md.progress)
269 		ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
270 
271 	mpc85xx_smp_init();
272 
273 	mpc85xx_mds_qe_init();
274 
275 	fsl_pci_assign_primary();
276 
277 	swiotlb_detect_4g();
278 }
279 
280 #if IS_BUILTIN(CONFIG_PHYLIB)
281 
282 static int __init board_fixups(void)
283 {
284 	char phy_id[20];
285 	char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
286 	struct device_node *mdio;
287 	struct resource res;
288 	int i;
289 
290 	for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
291 		mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
292 
293 		of_address_to_resource(mdio, 0, &res);
294 		snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
295 			(unsigned long long)res.start, 1);
296 
297 		phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
298 		phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
299 
300 		/* Register a workaround for errata */
301 		snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
302 			(unsigned long long)res.start, 7);
303 		phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
304 
305 		of_node_put(mdio);
306 	}
307 
308 	return 0;
309 }
310 
311 machine_arch_initcall(mpc8568_mds, board_fixups);
312 machine_arch_initcall(mpc8569_mds, board_fixups);
313 
314 #endif
315 
316 static int __init mpc85xx_publish_devices(void)
317 {
318 	return mpc85xx_common_publish_devices();
319 }
320 
321 machine_arch_initcall(mpc8568_mds, mpc85xx_publish_devices);
322 machine_arch_initcall(mpc8569_mds, mpc85xx_publish_devices);
323 machine_arch_initcall(p1021_mds, mpc85xx_common_publish_devices);
324 
325 static void __init mpc85xx_mds_pic_init(void)
326 {
327 	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
328 			MPIC_SINGLE_DEST_CPU,
329 			0, 256, " OpenPIC  ");
330 	BUG_ON(mpic == NULL);
331 
332 	mpic_init(mpic);
333 }
334 
335 define_machine(mpc8568_mds) {
336 	.name		= "MPC8568 MDS",
337 	.compatible	= "MPC85xxMDS",
338 	.setup_arch	= mpc85xx_mds_setup_arch,
339 	.init_IRQ	= mpc85xx_mds_pic_init,
340 	.get_irq	= mpic_get_irq,
341 	.progress	= udbg_progress,
342 #ifdef CONFIG_PCI
343 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
344 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
345 #endif
346 };
347 
348 define_machine(mpc8569_mds) {
349 	.name		= "MPC8569 MDS",
350 	.compatible	= "fsl,MPC8569EMDS",
351 	.setup_arch	= mpc85xx_mds_setup_arch,
352 	.init_IRQ	= mpc85xx_mds_pic_init,
353 	.get_irq	= mpic_get_irq,
354 	.progress	= udbg_progress,
355 #ifdef CONFIG_PCI
356 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
357 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
358 #endif
359 };
360 
361 define_machine(p1021_mds) {
362 	.name		= "P1021 MDS",
363 	.compatible	= "fsl,P1021MDS",
364 	.setup_arch	= mpc85xx_mds_setup_arch,
365 	.init_IRQ	= mpc85xx_mds_pic_init,
366 	.get_irq	= mpic_get_irq,
367 	.progress	= udbg_progress,
368 #ifdef CONFIG_PCI
369 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
370 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
371 #endif
372 };
373