1 /*
2  * (C) Copyright 2000-2002
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <watchdog.h>
10 
11 #include <mpc8xx.h>
12 #include <commproc.h>
13 
14 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS)
15 DECLARE_GLOBAL_DATA_PTR;
16 #endif
17 
18 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \
19     defined(CONFIG_SYS_SMC_UCODE_PATCH)
20 void cpm_load_patch (volatile immap_t * immr);
21 #endif
22 
23 /*
24  * Breath some life into the CPU...
25  *
26  * Set up the memory map,
27  * initialize a bunch of registers,
28  * initialize the UPM's
29  */
30 void cpu_init_f (volatile immap_t * immr)
31 {
32 	volatile memctl8xx_t *memctl = &immr->im_memctl;
33 # ifdef CONFIG_SYS_PLPRCR
34 	ulong mfmask;
35 # endif
36 	ulong reg;
37 
38 	/* SYPCR - contains watchdog control (11-9) */
39 
40 	immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;
41 
42 #if defined(CONFIG_WATCHDOG)
43 	reset_8xx_watchdog (immr);
44 #endif /* CONFIG_WATCHDOG */
45 
46 	/* SIUMCR - contains debug pin configuration (11-6) */
47 	immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
48 	/* initialize timebase status and control register (11-26) */
49 	/* unlock TBSCRK */
50 
51 	immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
52 	immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;
53 
54 	/* initialize the PIT (11-31) */
55 
56 	immr->im_sitk.sitk_piscrk = KAPWR_KEY;
57 	immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;
58 
59 	/* System integration timers. Don't change EBDF! (15-27) */
60 
61 	immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
62 	reg = immr->im_clkrst.car_sccr;
63 	reg &= SCCR_MASK;
64 	reg |= CONFIG_SYS_SCCR;
65 	immr->im_clkrst.car_sccr = reg;
66 
67 	/* PLL (CPU clock) settings (15-30) */
68 
69 	immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;
70 
71 	/* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to
72 	 * set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr,
73 	 * otherwise OR in CONFIG_SYS_PLPRCR so we do not change the current MF
74 	 * field value.
75 	 *
76 	 * For newer (starting MPC866) chips PLPRCR layout is different.
77 	 */
78 #ifdef CONFIG_SYS_PLPRCR
79 	if (get_immr(0xFFFF) >= MPC8xx_NEW_CLK)
80 	   mfmask = PLPRCR_MFACT_MSK;
81 	else
82 	   mfmask = PLPRCR_MF_MSK;
83 
84 	if ((CONFIG_SYS_PLPRCR & mfmask) != 0)
85 	   reg = CONFIG_SYS_PLPRCR;			/* reset control bits   */
86 	else {
87 	   reg = immr->im_clkrst.car_plprcr;
88 	   reg &= mfmask;			/* isolate MF-related fields */
89 	   reg |= CONFIG_SYS_PLPRCR;			/* reset control bits   */
90 	}
91 	immr->im_clkrst.car_plprcr = reg;
92 #endif
93 
94 	/*
95 	 * Memory Controller:
96 	 */
97 
98 	/* perform BR0 reset that MPC850 Rev. A can't guarantee */
99 	reg = memctl->memc_br0;
100 	reg &= BR_PS_MSK;	/* Clear everything except Port Size bits */
101 	reg |= BR_V;		/* then add just the "Bank Valid" bit     */
102 	memctl->memc_br0 = reg;
103 
104 	/* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
105 	 * preliminary addresses - these have to be modified later
106 	 * when FLASH size has been determined
107 	 *
108 	 * Depending on the size of the memory region defined by
109 	 * CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the
110 	 * CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't
111 	 * map CONFIG_SYS_MONITOR_BASE.
112 	 *
113 	 * For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is
114 	 * 0xff000000, but CONFIG_SYS_OR0_REMAP's address mask is 0xfff80000.
115 	 *
116 	 * If BR0 wasn't loaded with address base 0xff000000, then BR0's
117 	 * base address remains as 0x00000000. However, the address mask
118 	 * have been narrowed to 512Kb, so CONFIG_SYS_MONITOR_BASE wasn't mapped
119 	 * into the Bank0.
120 	 *
121 	 * This is why CONFIG_IVMS8 and similar boards must load BR0 with
122 	 * CONFIG_SYS_BR0_PRELIM in advance.
123 	 *
124 	 * [Thanks to Michael Liao for this explanation.
125 	 *  I owe him a free beer. - wd]
126 	 */
127 
128 #if defined(CONFIG_SYS_OR0_REMAP)
129 	memctl->memc_or0 = CONFIG_SYS_OR0_REMAP;
130 #endif
131 #if defined(CONFIG_SYS_OR1_REMAP)
132 	memctl->memc_or1 = CONFIG_SYS_OR1_REMAP;
133 #endif
134 #if defined(CONFIG_SYS_OR5_REMAP)
135 	memctl->memc_or5 = CONFIG_SYS_OR5_REMAP;
136 #endif
137 
138 	/* now restrict to preliminary range */
139 	memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
140 	memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;
141 
142 #if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM))
143 	memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
144 	memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
145 #endif
146 
147 #if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM)
148 	memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM;
149 	memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM;
150 #endif
151 
152 #if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM)
153 	memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
154 	memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
155 #endif
156 
157 #if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM)
158 	memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM;
159 	memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM;
160 #endif
161 
162 #if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM)
163 	memctl->memc_or5 = CONFIG_SYS_OR5_PRELIM;
164 	memctl->memc_br5 = CONFIG_SYS_BR5_PRELIM;
165 #endif
166 
167 #if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM)
168 	memctl->memc_or6 = CONFIG_SYS_OR6_PRELIM;
169 	memctl->memc_br6 = CONFIG_SYS_BR6_PRELIM;
170 #endif
171 
172 #if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM)
173 	memctl->memc_or7 = CONFIG_SYS_OR7_PRELIM;
174 	memctl->memc_br7 = CONFIG_SYS_BR7_PRELIM;
175 #endif
176 
177 	/*
178 	 * Reset CPM
179 	 */
180 	immr->im_cpm.cp_cpcr = CPM_CR_RST | CPM_CR_FLG;
181 	do {			/* Spin until command processed     */
182 		__asm__ ("eieio");
183 	} while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
184 
185 #ifdef CONFIG_SYS_RCCR			/* must be done before cpm_load_patch() */
186 	/* write config value */
187 	immr->im_cpm.cp_rccr = CONFIG_SYS_RCCR;
188 #endif
189 
190 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \
191     defined(CONFIG_SYS_SMC_UCODE_PATCH)
192 	cpm_load_patch (immr);	/* load mpc8xx  microcode patch */
193 #endif
194 }
195 
196 /*
197  * initialize higher level parts of CPU like timers
198  */
199 int cpu_init_r (void)
200 {
201 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS)
202 	bd_t *bd = gd->bd;
203 	volatile immap_t *immr = (volatile immap_t *) (bd->bi_immr_base);
204 #endif
205 
206 #ifdef CONFIG_SYS_RTCSC
207 	/* Unlock RTSC register */
208 	immr->im_sitk.sitk_rtcsck = KAPWR_KEY;
209 	/* write config value */
210 	immr->im_sit.sit_rtcsc = CONFIG_SYS_RTCSC;
211 #endif
212 
213 #ifdef CONFIG_SYS_RMDS
214 	/* write config value */
215 	immr->im_cpm.cp_rmds = CONFIG_SYS_RMDS;
216 #endif
217 	return (0);
218 }
219