1 /*
2  * (C) Copyright 2006
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  *
23  */
24 
25 #include <common.h>
26 #include <ioports.h>
27 #include <mpc83xx.h>
28 #include <asm/mpc8349_pci.h>
29 #include <i2c.h>
30 #include <spi.h>
31 #include <miiphy.h>
32 #include <spd_sdram.h>
33 
34 #if defined(CONFIG_OF_LIBFDT)
35 #include <libfdt.h>
36 #endif
37 
38 int fixed_sdram(void);
39 void sdram_init(void);
40 
41 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_MPC83XX)
42 void ddr_enable_ecc(unsigned int dram_size);
43 #endif
44 
45 int board_early_init_f (void)
46 {
47 	volatile u8* bcsr = (volatile u8*)CFG_BCSR;
48 
49 	/* Enable flash write */
50 	bcsr[1] &= ~0x01;
51 
52 #ifdef CFG_USE_MPC834XSYS_USB_PHY
53 	/* Use USB PHY on SYS board */
54 	bcsr[5] |= 0x02;
55 #endif
56 
57 	return 0;
58 }
59 
60 #define ns2clk(ns) (ns / (1000000000 / CONFIG_8349_CLKIN) + 1)
61 
62 phys_size_t initdram (int board_type)
63 {
64 	volatile immap_t *im = (immap_t *)CFG_IMMR;
65 	u32 msize = 0;
66 
67 	if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32)im)
68 		return -1;
69 
70 	/* DDR SDRAM - Main SODIMM */
71 	im->sysconf.ddrlaw[0].bar = CFG_DDR_BASE & LAWBAR_BAR;
72 #if defined(CONFIG_SPD_EEPROM)
73 	msize = spd_sdram();
74 #else
75 	msize = fixed_sdram();
76 #endif
77 	/*
78 	 * Initialize SDRAM if it is on local bus.
79 	 */
80 	sdram_init();
81 
82 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
83 	/*
84 	 * Initialize and enable DDR ECC.
85 	 */
86 	ddr_enable_ecc(msize * 1024 * 1024);
87 #endif
88 
89 	/* return total bus SDRAM size(bytes)  -- DDR */
90 	return (msize * 1024 * 1024);
91 }
92 
93 #if !defined(CONFIG_SPD_EEPROM)
94 /*************************************************************************
95  *  fixed sdram init -- doesn't use serial presence detect.
96  ************************************************************************/
97 int fixed_sdram(void)
98 {
99 	volatile immap_t *im = (immap_t *)CFG_IMMR;
100 	u32 msize = 0;
101 	u32 ddr_size;
102 	u32 ddr_size_log2;
103 
104 	msize = CFG_DDR_SIZE;
105 	for (ddr_size = msize << 20, ddr_size_log2 = 0;
106 	     (ddr_size > 1);
107 	     ddr_size = ddr_size>>1, ddr_size_log2++) {
108 		if (ddr_size & 1) {
109 			return -1;
110 		}
111 	}
112 	im->sysconf.ddrlaw[0].bar = ((CFG_DDR_SDRAM_BASE>>12) & 0xfffff);
113 	im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
114 
115 #if (CFG_DDR_SIZE != 256)
116 #warning Currenly any ddr size other than 256 is not supported
117 #endif
118 #ifdef CONFIG_DDR_II
119 	im->ddr.csbnds[2].csbnds = CFG_DDR_CS2_BNDS;
120 	im->ddr.cs_config[2] = CFG_DDR_CS2_CONFIG;
121 	im->ddr.timing_cfg_0 = CFG_DDR_TIMING_0;
122 	im->ddr.timing_cfg_1 = CFG_DDR_TIMING_1;
123 	im->ddr.timing_cfg_2 = CFG_DDR_TIMING_2;
124 	im->ddr.timing_cfg_3 = CFG_DDR_TIMING_3;
125 	im->ddr.sdram_cfg = CFG_DDR_SDRAM_CFG;
126 	im->ddr.sdram_cfg2 = CFG_DDR_SDRAM_CFG2;
127 	im->ddr.sdram_mode = CFG_DDR_MODE;
128 	im->ddr.sdram_mode2 = CFG_DDR_MODE2;
129 	im->ddr.sdram_interval = CFG_DDR_INTERVAL;
130 	im->ddr.sdram_clk_cntl = CFG_DDR_CLK_CNTL;
131 #else
132 	im->ddr.csbnds[2].csbnds = 0x0000000f;
133 	im->ddr.cs_config[2] = CFG_DDR_CONFIG;
134 
135 	/* currently we use only one CS, so disable the other banks */
136 	im->ddr.cs_config[0] = 0;
137 	im->ddr.cs_config[1] = 0;
138 	im->ddr.cs_config[3] = 0;
139 
140 	im->ddr.timing_cfg_1 = CFG_DDR_TIMING_1;
141 	im->ddr.timing_cfg_2 = CFG_DDR_TIMING_2;
142 
143 	im->ddr.sdram_cfg =
144 		SDRAM_CFG_SREN
145 #if defined(CONFIG_DDR_2T_TIMING)
146 		| SDRAM_CFG_2T_EN
147 #endif
148 		| 2 << SDRAM_CFG_SDRAM_TYPE_SHIFT;
149 #if defined (CONFIG_DDR_32BIT)
150 	/* for 32-bit mode burst length is 8 */
151 	im->ddr.sdram_cfg |= (SDRAM_CFG_32_BE | SDRAM_CFG_8_BE);
152 #endif
153 	im->ddr.sdram_mode = CFG_DDR_MODE;
154 
155 	im->ddr.sdram_interval = CFG_DDR_INTERVAL;
156 #endif
157 	udelay(200);
158 
159 	/* enable DDR controller */
160 	im->ddr.sdram_cfg |= SDRAM_CFG_MEM_EN;
161 	return msize;
162 }
163 #endif/*!CFG_SPD_EEPROM*/
164 
165 
166 int checkboard (void)
167 {
168 	puts("Board: Freescale MPC8349EMDS\n");
169 	return 0;
170 }
171 
172 /*
173  * if MPC8349EMDS is soldered with SDRAM
174  */
175 #if defined(CFG_BR2_PRELIM)  \
176 	&& defined(CFG_OR2_PRELIM) \
177 	&& defined(CFG_LBLAWBAR2_PRELIM) \
178 	&& defined(CFG_LBLAWAR2_PRELIM)
179 /*
180  * Initialize SDRAM memory on the Local Bus.
181  */
182 
183 void sdram_init(void)
184 {
185 	volatile immap_t *immap = (immap_t *)CFG_IMMR;
186 	volatile lbus83xx_t *lbc= &immap->lbus;
187 	uint *sdram_addr = (uint *)CFG_LBC_SDRAM_BASE;
188 
189 	/*
190 	 * Setup SDRAM Base and Option Registers, already done in cpu_init.c
191 	 */
192 
193 	/* setup mtrpt, lsrt and lbcr for LB bus */
194 	lbc->lbcr = CFG_LBC_LBCR;
195 	lbc->mrtpr = CFG_LBC_MRTPR;
196 	lbc->lsrt = CFG_LBC_LSRT;
197 	asm("sync");
198 
199 	/*
200 	 * Configure the SDRAM controller Machine Mode Register.
201 	 */
202 	lbc->lsdmr = CFG_LBC_LSDMR_5; /* 0x40636733; normal operation */
203 
204 	lbc->lsdmr = CFG_LBC_LSDMR_1; /* 0x68636733; precharge all the banks */
205 	asm("sync");
206 	*sdram_addr = 0xff;
207 	udelay(100);
208 
209 	lbc->lsdmr = CFG_LBC_LSDMR_2; /* 0x48636733; auto refresh */
210 	asm("sync");
211 	/*1 times*/
212 	*sdram_addr = 0xff;
213 	udelay(100);
214 	/*2 times*/
215 	*sdram_addr = 0xff;
216 	udelay(100);
217 	/*3 times*/
218 	*sdram_addr = 0xff;
219 	udelay(100);
220 	/*4 times*/
221 	*sdram_addr = 0xff;
222 	udelay(100);
223 	/*5 times*/
224 	*sdram_addr = 0xff;
225 	udelay(100);
226 	/*6 times*/
227 	*sdram_addr = 0xff;
228 	udelay(100);
229 	/*7 times*/
230 	*sdram_addr = 0xff;
231 	udelay(100);
232 	/*8 times*/
233 	*sdram_addr = 0xff;
234 	udelay(100);
235 
236 	/* 0x58636733; mode register write operation */
237 	lbc->lsdmr = CFG_LBC_LSDMR_4;
238 	asm("sync");
239 	*sdram_addr = 0xff;
240 	udelay(100);
241 
242 	lbc->lsdmr = CFG_LBC_LSDMR_5; /* 0x40636733; normal operation */
243 	asm("sync");
244 	*sdram_addr = 0xff;
245 	udelay(100);
246 }
247 #else
248 void sdram_init(void)
249 {
250 }
251 #endif
252 
253 /*
254  * The following are used to control the SPI chip selects for the SPI command.
255  */
256 #ifdef CONFIG_MPC8XXX_SPI
257 
258 #define SPI_CS_MASK	0x80000000
259 
260 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
261 {
262 	return bus == 0 && cs == 0;
263 }
264 
265 void spi_cs_activate(struct spi_slave *slave)
266 {
267 	volatile gpio83xx_t *iopd = &((immap_t *)CFG_IMMR)->gpio[0];
268 
269 	iopd->dat &= ~SPI_CS_MASK;
270 }
271 
272 void spi_cs_deactivate(struct spi_slave *slave)
273 {
274 	volatile gpio83xx_t *iopd = &((immap_t *)CFG_IMMR)->gpio[0];
275 
276 	iopd->dat |=  SPI_CS_MASK;
277 }
278 #endif /* CONFIG_HARD_SPI */
279 
280 #if defined(CONFIG_OF_BOARD_SETUP)
281 void ft_board_setup(void *blob, bd_t *bd)
282 {
283 	ft_cpu_setup(blob, bd);
284 #ifdef CONFIG_PCI
285 	ft_pci_setup(blob, bd);
286 #endif
287 }
288 #endif
289