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/prom.h>
43 #include <asm/udbg.h>
44 #include <sysdev/fsl_soc.h>
45 #include <sysdev/fsl_pci.h>
46 #include <soc/fsl/qe/qe.h>
47 #include <asm/mpic.h>
48 #include <asm/swiotlb.h>
49 #include "smp.h"
50
51 #include "mpc85xx.h"
52
53 #undef DEBUG
54 #ifdef DEBUG
55 #define DBG(fmt...) udbg_printf(fmt)
56 #else
57 #define DBG(fmt...)
58 #endif
59
60 #if IS_BUILTIN(CONFIG_PHYLIB)
61
62 #define MV88E1111_SCR 0x10
63 #define MV88E1111_SCR_125CLK 0x0010
mpc8568_fixup_125_clock(struct phy_device * phydev)64 static int mpc8568_fixup_125_clock(struct phy_device *phydev)
65 {
66 int scr;
67 int err;
68
69 /* Workaround for the 125 CLK Toggle */
70 scr = phy_read(phydev, MV88E1111_SCR);
71
72 if (scr < 0)
73 return scr;
74
75 err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));
76
77 if (err)
78 return err;
79
80 err = phy_write(phydev, MII_BMCR, BMCR_RESET);
81
82 if (err)
83 return err;
84
85 scr = phy_read(phydev, MV88E1111_SCR);
86
87 if (scr < 0)
88 return scr;
89
90 err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);
91
92 return err;
93 }
94
mpc8568_mds_phy_fixups(struct phy_device * phydev)95 static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
96 {
97 int temp;
98 int err;
99
100 /* Errata */
101 err = phy_write(phydev,29, 0x0006);
102
103 if (err)
104 return err;
105
106 temp = phy_read(phydev, 30);
107
108 if (temp < 0)
109 return temp;
110
111 temp = (temp & (~0x8000)) | 0x4000;
112 err = phy_write(phydev,30, temp);
113
114 if (err)
115 return err;
116
117 err = phy_write(phydev,29, 0x000a);
118
119 if (err)
120 return err;
121
122 temp = phy_read(phydev, 30);
123
124 if (temp < 0)
125 return temp;
126
127 temp = phy_read(phydev, 30);
128
129 if (temp < 0)
130 return temp;
131
132 temp &= ~0x0020;
133
134 err = phy_write(phydev,30,temp);
135
136 if (err)
137 return err;
138
139 /* Disable automatic MDI/MDIX selection */
140 temp = phy_read(phydev, 16);
141
142 if (temp < 0)
143 return temp;
144
145 temp &= ~0x0060;
146 err = phy_write(phydev,16,temp);
147
148 return err;
149 }
150
151 #endif
152
153 /* ************************************************************************
154 *
155 * Setup the architecture
156 *
157 */
158 #ifdef CONFIG_QUICC_ENGINE
mpc85xx_mds_reset_ucc_phys(void)159 static void __init mpc85xx_mds_reset_ucc_phys(void)
160 {
161 struct device_node *np;
162 static u8 __iomem *bcsr_regs;
163
164 /* Map BCSR area */
165 np = of_find_node_by_name(NULL, "bcsr");
166 if (!np)
167 return;
168
169 bcsr_regs = of_iomap(np, 0);
170 of_node_put(np);
171 if (!bcsr_regs)
172 return;
173
174 if (machine_is(mpc8568_mds)) {
175 #define BCSR_UCC1_GETH_EN (0x1 << 7)
176 #define BCSR_UCC2_GETH_EN (0x1 << 7)
177 #define BCSR_UCC1_MODE_MSK (0x3 << 4)
178 #define BCSR_UCC2_MODE_MSK (0x3 << 0)
179
180 /* Turn off UCC1 & UCC2 */
181 clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
182 clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
183
184 /* Mode is RGMII, all bits clear */
185 clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
186 BCSR_UCC2_MODE_MSK);
187
188 /* Turn UCC1 & UCC2 on */
189 setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
190 setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
191 } else if (machine_is(mpc8569_mds)) {
192 #define BCSR7_UCC12_GETHnRST (0x1 << 2)
193 #define BCSR8_UEM_MARVELL_RST (0x1 << 1)
194 #define BCSR_UCC_RGMII (0x1 << 6)
195 #define BCSR_UCC_RTBI (0x1 << 5)
196 /*
197 * U-Boot mangles interrupt polarity for Marvell PHYs,
198 * so reset built-in and UEM Marvell PHYs, this puts
199 * the PHYs into their normal state.
200 */
201 clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
202 setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
203
204 setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
205 clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
206
207 for_each_compatible_node(np, "network", "ucc_geth") {
208 const unsigned int *prop;
209 int ucc_num;
210
211 prop = of_get_property(np, "cell-index", NULL);
212 if (prop == NULL)
213 continue;
214
215 ucc_num = *prop - 1;
216
217 prop = of_get_property(np, "phy-connection-type", NULL);
218 if (prop == NULL)
219 continue;
220
221 if (strcmp("rtbi", (const char *)prop) == 0)
222 clrsetbits_8(&bcsr_regs[7 + ucc_num],
223 BCSR_UCC_RGMII, BCSR_UCC_RTBI);
224 }
225 } else if (machine_is(p1021_mds)) {
226 #define BCSR11_ENET_MICRST (0x1 << 5)
227 /* Reset Micrel PHY */
228 clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
229 setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
230 }
231
232 iounmap(bcsr_regs);
233 }
234
mpc85xx_mds_qe_init(void)235 static void __init mpc85xx_mds_qe_init(void)
236 {
237 struct device_node *np;
238
239 mpc85xx_qe_par_io_init();
240 mpc85xx_mds_reset_ucc_phys();
241
242 if (machine_is(p1021_mds)) {
243
244 struct ccsr_guts __iomem *guts;
245
246 np = of_find_node_by_name(NULL, "global-utilities");
247 if (np) {
248 guts = of_iomap(np, 0);
249 if (!guts)
250 pr_err("mpc85xx-rdb: could not map global utilities register\n");
251 else{
252 /* P1021 has pins muxed for QE and other functions. To
253 * enable QE UEC mode, we need to set bit QE0 for UCC1
254 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
255 * and QE12 for QE MII management signals in PMUXCR
256 * register.
257 */
258 setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
259 MPC85xx_PMUXCR_QE(3) |
260 MPC85xx_PMUXCR_QE(9) |
261 MPC85xx_PMUXCR_QE(12));
262 iounmap(guts);
263 }
264 of_node_put(np);
265 }
266
267 }
268 }
269
270 #else
mpc85xx_mds_qe_init(void)271 static void __init mpc85xx_mds_qe_init(void) { }
272 #endif /* CONFIG_QUICC_ENGINE */
273
mpc85xx_mds_setup_arch(void)274 static void __init mpc85xx_mds_setup_arch(void)
275 {
276 if (ppc_md.progress)
277 ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
278
279 mpc85xx_smp_init();
280
281 mpc85xx_mds_qe_init();
282
283 fsl_pci_assign_primary();
284
285 swiotlb_detect_4g();
286 }
287
288 #if IS_BUILTIN(CONFIG_PHYLIB)
289
board_fixups(void)290 static int __init board_fixups(void)
291 {
292 char phy_id[20];
293 char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
294 struct device_node *mdio;
295 struct resource res;
296 int i;
297
298 for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
299 mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);
300
301 of_address_to_resource(mdio, 0, &res);
302 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
303 (unsigned long long)res.start, 1);
304
305 phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
306 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
307
308 /* Register a workaround for errata */
309 snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
310 (unsigned long long)res.start, 7);
311 phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);
312
313 of_node_put(mdio);
314 }
315
316 return 0;
317 }
318
319 machine_arch_initcall(mpc8568_mds, board_fixups);
320 machine_arch_initcall(mpc8569_mds, board_fixups);
321
322 #endif
323
mpc85xx_publish_devices(void)324 static int __init mpc85xx_publish_devices(void)
325 {
326 return mpc85xx_common_publish_devices();
327 }
328
329 machine_arch_initcall(mpc8568_mds, mpc85xx_publish_devices);
330 machine_arch_initcall(mpc8569_mds, mpc85xx_publish_devices);
331 machine_arch_initcall(p1021_mds, mpc85xx_common_publish_devices);
332
mpc85xx_mds_pic_init(void)333 static void __init mpc85xx_mds_pic_init(void)
334 {
335 struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
336 MPIC_SINGLE_DEST_CPU,
337 0, 256, " OpenPIC ");
338 BUG_ON(mpic == NULL);
339
340 mpic_init(mpic);
341 }
342
mpc85xx_mds_probe(void)343 static int __init mpc85xx_mds_probe(void)
344 {
345 return of_machine_is_compatible("MPC85xxMDS");
346 }
347
define_machine(mpc8568_mds)348 define_machine(mpc8568_mds) {
349 .name = "MPC8568 MDS",
350 .probe = mpc85xx_mds_probe,
351 .setup_arch = mpc85xx_mds_setup_arch,
352 .init_IRQ = mpc85xx_mds_pic_init,
353 .get_irq = mpic_get_irq,
354 .calibrate_decr = generic_calibrate_decr,
355 .progress = udbg_progress,
356 #ifdef CONFIG_PCI
357 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
358 .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
359 #endif
360 };
361
mpc8569_mds_probe(void)362 static int __init mpc8569_mds_probe(void)
363 {
364 return of_machine_is_compatible("fsl,MPC8569EMDS");
365 }
366
define_machine(mpc8569_mds)367 define_machine(mpc8569_mds) {
368 .name = "MPC8569 MDS",
369 .probe = mpc8569_mds_probe,
370 .setup_arch = mpc85xx_mds_setup_arch,
371 .init_IRQ = mpc85xx_mds_pic_init,
372 .get_irq = mpic_get_irq,
373 .calibrate_decr = generic_calibrate_decr,
374 .progress = udbg_progress,
375 #ifdef CONFIG_PCI
376 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
377 .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
378 #endif
379 };
380
p1021_mds_probe(void)381 static int __init p1021_mds_probe(void)
382 {
383 return of_machine_is_compatible("fsl,P1021MDS");
384
385 }
386
define_machine(p1021_mds)387 define_machine(p1021_mds) {
388 .name = "P1021 MDS",
389 .probe = p1021_mds_probe,
390 .setup_arch = mpc85xx_mds_setup_arch,
391 .init_IRQ = mpc85xx_mds_pic_init,
392 .get_irq = mpic_get_irq,
393 .calibrate_decr = generic_calibrate_decr,
394 .progress = udbg_progress,
395 #ifdef CONFIG_PCI
396 .pcibios_fixup_bus = fsl_pcibios_fixup_bus,
397 .pcibios_fixup_phb = fsl_pcibios_fixup_phb,
398 #endif
399 };
400