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1 /*
2  *  (C) Copyright 2010,2011
3  *  NVIDIA Corporation <www.nvidia.com>
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 #include <common.h>
25 #include <ns16550.h>
26 #include <asm/io.h>
27 #include <asm/arch/tegra2.h>
28 #include <asm/arch/sys_proto.h>
29
30 #include <asm/arch/clk_rst.h>
31 #include <asm/arch/pinmux.h>
32 #include <asm/arch/uart.h>
33 #include "board.h"
34
35 #ifdef CONFIG_TEGRA2_MMC
36 #include <mmc.h>
37 #endif
38
39 DECLARE_GLOBAL_DATA_PTR;
40
41 const struct tegra2_sysinfo sysinfo = {
42         CONFIG_TEGRA2_BOARD_STRING
43 };
44
45 #ifdef CONFIG_BOARD_EARLY_INIT_F
46 int board_early_init_f(void)
47 {
48         /* Initialize periph clocks */
49         clock_init();
50
51         /* Initialize periph pinmuxes */
52         pinmux_init();
53
54         /* Initialize periph GPIOs */
55         gpio_init();
56
57         /* Init UART, scratch regs, and start CPU */
58         tegra2_start();
59         return 0;
60 }
61 #endif  /* EARLY_INIT */
62
63 /*
64  * Routine: timer_init
65  * Description: init the timestamp and lastinc value
66  */
67 int timer_init(void)
68 {
69         return 0;
70 }
71
72 /*
73  * Routine: clock_init_uart
74  * Description: init the PLL and clock for the UART(s)
75  */
76 static void clock_init_uart(void)
77 {
78         struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
79         u32 reg;
80
81         reg = readl(&clkrst->crc_pllp_base);
82         if (!(reg & PLL_BASE_OVRRIDE)) {
83                 /* Override pllp setup for 216MHz operation. */
84                 reg = (PLL_BYPASS | PLL_BASE_OVRRIDE | PLL_DIVP);
85                 reg |= (((NVRM_PLLP_FIXED_FREQ_KHZ/500) << 8) | PLL_DIVM);
86                 writel(reg, &clkrst->crc_pllp_base);
87
88                 reg |= PLL_ENABLE;
89                 writel(reg, &clkrst->crc_pllp_base);
90
91                 reg &= ~PLL_BYPASS;
92                 writel(reg, &clkrst->crc_pllp_base);
93         }
94
95         /* Now do the UART reset/clock enable */
96 #if defined(CONFIG_TEGRA2_ENABLE_UARTA)
97         /* Assert Reset to UART */
98         reg = readl(&clkrst->crc_rst_dev_l);
99         reg |= SWR_UARTA_RST;           /* SWR_UARTA_RST = 1 */
100         writel(reg, &clkrst->crc_rst_dev_l);
101
102         /* Enable clk to UART */
103         reg = readl(&clkrst->crc_clk_out_enb_l);
104         reg |= CLK_ENB_UARTA;           /* CLK_ENB_UARTA = 1 */
105         writel(reg, &clkrst->crc_clk_out_enb_l);
106
107         /* Enable pllp_out0 to UART */
108         reg = readl(&clkrst->crc_clk_src_uarta);
109         reg &= 0x3FFFFFFF;      /* UARTA_CLK_SRC = 00, PLLP_OUT0 */
110         writel(reg, &clkrst->crc_clk_src_uarta);
111
112         /* wait for 2us */
113         udelay(2);
114
115         /* De-assert reset to UART */
116         reg = readl(&clkrst->crc_rst_dev_l);
117         reg &= ~SWR_UARTA_RST;          /* SWR_UARTA_RST = 0 */
118         writel(reg, &clkrst->crc_rst_dev_l);
119 #endif  /* CONFIG_TEGRA2_ENABLE_UARTA */
120 #if defined(CONFIG_TEGRA2_ENABLE_UARTD)
121         /* Assert Reset to UART */
122         reg = readl(&clkrst->crc_rst_dev_u);
123         reg |= SWR_UARTD_RST;           /* SWR_UARTD_RST = 1 */
124         writel(reg, &clkrst->crc_rst_dev_u);
125
126         /* Enable clk to UART */
127         reg = readl(&clkrst->crc_clk_out_enb_u);
128         reg |= CLK_ENB_UARTD;           /* CLK_ENB_UARTD = 1 */
129         writel(reg, &clkrst->crc_clk_out_enb_u);
130
131         /* Enable pllp_out0 to UART */
132         reg = readl(&clkrst->crc_clk_src_uartd);
133         reg &= 0x3FFFFFFF;      /* UARTD_CLK_SRC = 00, PLLP_OUT0 */
134         writel(reg, &clkrst->crc_clk_src_uartd);
135
136         /* wait for 2us */
137         udelay(2);
138
139         /* De-assert reset to UART */
140         reg = readl(&clkrst->crc_rst_dev_u);
141         reg &= ~SWR_UARTD_RST;          /* SWR_UARTD_RST = 0 */
142         writel(reg, &clkrst->crc_rst_dev_u);
143 #endif  /* CONFIG_TEGRA2_ENABLE_UARTD */
144 }
145
146 /*
147  * Routine: pin_mux_uart
148  * Description: setup the pin muxes/tristate values for the UART(s)
149  */
150 static void pin_mux_uart(void)
151 {
152         struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
153         u32 reg;
154
155 #if defined(CONFIG_TEGRA2_ENABLE_UARTA)
156         reg = readl(&pmt->pmt_ctl_c);
157         reg &= 0xFFF0FFFF;      /* IRRX_/IRTX_SEL [19:16] = 00 UARTA */
158         writel(reg, &pmt->pmt_ctl_c);
159
160         reg = readl(&pmt->pmt_tri_a);
161         reg &= ~Z_IRRX;         /* Z_IRRX = normal (0) */
162         reg &= ~Z_IRTX;         /* Z_IRTX = normal (0) */
163         writel(reg, &pmt->pmt_tri_a);
164 #endif  /* CONFIG_TEGRA2_ENABLE_UARTA */
165 #if defined(CONFIG_TEGRA2_ENABLE_UARTD)
166         reg = readl(&pmt->pmt_ctl_b);
167         reg &= 0xFFFFFFF3;      /* GMC_SEL [3:2] = 00, UARTD */
168         writel(reg, &pmt->pmt_ctl_b);
169
170         reg = readl(&pmt->pmt_tri_a);
171         reg &= ~Z_GMC;          /* Z_GMC = normal (0) */
172         writel(reg, &pmt->pmt_tri_a);
173 #endif  /* CONFIG_TEGRA2_ENABLE_UARTD */
174 }
175
176 /*
177  * Routine: clock_init_mmc
178  * Description: init the PLL and clocks for the SDMMC controllers
179  */
180 static void clock_init_mmc(void)
181 {
182         struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
183         u32 reg;
184
185         /* Do the SDMMC resets/clock enables */
186
187         /* Assert Reset to SDMMC4 */
188         reg = readl(&clkrst->crc_rst_dev_l);
189         reg |= SWR_SDMMC4_RST;          /* SWR_SDMMC4_RST = 1 */
190         writel(reg, &clkrst->crc_rst_dev_l);
191
192         /* Enable clk to SDMMC4 */
193         reg = readl(&clkrst->crc_clk_out_enb_l);
194         reg |= CLK_ENB_SDMMC4;          /* CLK_ENB_SDMMC4 = 1 */
195         writel(reg, &clkrst->crc_clk_out_enb_l);
196
197         /* Enable pllp_out0 to SDMMC4 */
198         reg = readl(&clkrst->crc_clk_src_sdmmc4);
199         reg &= 0x3FFFFF00;      /* SDMMC4_CLK_SRC = 00, PLLP_OUT0 */
200         reg |= (10 << 1);       /* n-1, 11-1 shl 1 */
201         writel(reg, &clkrst->crc_clk_src_sdmmc4);
202
203         /*
204          * As per the Tegra2 TRM, section 5.3.4:
205          * 'Wait 2 us for the clock to flush through the pipe/logic'
206          */
207         udelay(2);
208
209         /* De-assert reset to SDMMC4 */
210         reg = readl(&clkrst->crc_rst_dev_l);
211         reg &= ~SWR_SDMMC4_RST;         /* SWR_SDMMC4_RST = 0 */
212         writel(reg, &clkrst->crc_rst_dev_l);
213
214         /* Assert Reset to SDMMC3 */
215         reg = readl(&clkrst->crc_rst_dev_u);
216         reg |= SWR_SDMMC3_RST;          /* SWR_SDMMC3_RST = 1 */
217         writel(reg, &clkrst->crc_rst_dev_u);
218
219         /* Enable clk to SDMMC3 */
220         reg = readl(&clkrst->crc_clk_out_enb_u);
221         reg |= CLK_ENB_SDMMC3;          /* CLK_ENB_SDMMC3 = 1 */
222         writel(reg, &clkrst->crc_clk_out_enb_u);
223
224         /* Enable pllp_out0 to SDMMC4, set divisor to 11 for 20MHz */
225         reg = readl(&clkrst->crc_clk_src_sdmmc3);
226         reg &= 0x3FFFFF00;      /* SDMMC3_CLK_SRC = 00, PLLP_OUT0 */
227         reg |= (10 << 1);       /* n-1, 11-1 shl 1 */
228         writel(reg, &clkrst->crc_clk_src_sdmmc3);
229
230         /* wait for 2us */
231         udelay(2);
232
233         /* De-assert reset to SDMMC3 */
234         reg = readl(&clkrst->crc_rst_dev_u);
235         reg &= ~SWR_SDMMC3_RST;         /* SWR_SDMMC3_RST = 0 */
236         writel(reg, &clkrst->crc_rst_dev_u);
237 }
238
239 /*
240  * Routine: pin_mux_mmc
241  * Description: setup the pin muxes/tristate values for the SDMMC(s)
242  */
243 static void pin_mux_mmc(void)
244 {
245         struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
246         u32 reg;
247
248         /* SDMMC4 */
249         /* config 2, x8 on 2nd set of pins */
250         reg = readl(&pmt->pmt_ctl_a);
251         reg |= (3 << 16);       /* ATB_SEL [17:16] = 11 SDIO4 */
252         writel(reg, &pmt->pmt_ctl_a);
253         reg = readl(&pmt->pmt_ctl_b);
254         reg |= (3 << 0);        /* GMA_SEL [1:0] = 11 SDIO4 */
255         writel(reg, &pmt->pmt_ctl_b);
256         reg = readl(&pmt->pmt_ctl_d);
257         reg |= (3 << 0);        /* GME_SEL [1:0] = 11 SDIO4 */
258         writel(reg, &pmt->pmt_ctl_d);
259
260         reg = readl(&pmt->pmt_tri_a);
261         reg &= ~Z_ATB;          /* Z_ATB = normal (0) */
262         reg &= ~Z_GMA;          /* Z_GMA = normal (0) */
263         writel(reg, &pmt->pmt_tri_a);
264         reg = readl(&pmt->pmt_tri_b);
265         reg &= ~Z_GME;          /* Z_GME = normal (0) */
266         writel(reg, &pmt->pmt_tri_b);
267
268         /* SDMMC3 */
269         /* SDIO3_CLK, SDIO3_CMD, SDIO3_DAT[3:0] */
270         reg = readl(&pmt->pmt_ctl_d);
271         reg &= 0xFFFF03FF;
272         reg |= (2 << 10);       /* SDB_SEL [11:10] = 01 SDIO3 */
273         reg |= (2 << 12);       /* SDC_SEL [13:12] = 01 SDIO3 */
274         reg |= (2 << 14);       /* SDD_SEL [15:14] = 01 SDIO3 */
275         writel(reg, &pmt->pmt_ctl_d);
276
277         reg = readl(&pmt->pmt_tri_b);
278         reg &= ~Z_SDC;          /* Z_SDC = normal (0) */
279         reg &= ~Z_SDD;          /* Z_SDD = normal (0) */
280         writel(reg, &pmt->pmt_tri_b);
281         reg = readl(&pmt->pmt_tri_d);
282         reg &= ~Z_SDB;          /* Z_SDB = normal (0) */
283         writel(reg, &pmt->pmt_tri_d);
284 }
285
286 /*
287  * Routine: clock_init
288  * Description: Do individual peripheral clock reset/enables
289  */
290 void clock_init(void)
291 {
292         clock_init_uart();
293 }
294
295 /*
296  * Routine: pinmux_init
297  * Description: Do individual peripheral pinmux configs
298  */
299 void pinmux_init(void)
300 {
301         pin_mux_uart();
302 }
303
304 /*
305  * Routine: gpio_init
306  * Description: Do individual peripheral GPIO configs
307  */
308 void gpio_init(void)
309 {
310         gpio_config_uart();
311 }
312
313 /*
314  * Routine: board_init
315  * Description: Early hardware init.
316  */
317 int board_init(void)
318 {
319         /* boot param addr */
320         gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
321         /* board id for Linux */
322         gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
323
324         return 0;
325 }
326
327 #ifdef CONFIG_TEGRA2_MMC
328 /* this is a weak define that we are overriding */
329 int board_mmc_init(bd_t *bd)
330 {
331         debug("board_mmc_init called\n");
332         /* Enable clocks, muxes, etc. for SDMMC controllers */
333         clock_init_mmc();
334         pin_mux_mmc();
335
336         debug("board_mmc_init: init eMMC\n");
337         /* init dev 0, eMMC chip, with 4-bit bus */
338         tegra2_mmc_init(0, 4);
339
340         debug("board_mmc_init: init SD slot\n");
341         /* init dev 1, SD slot, with 4-bit bus */
342         tegra2_mmc_init(1, 4);
343
344         return 0;
345 }
346
347 /* this is a weak define that we are overriding */
348 int board_mmc_getcd(u8 *cd, struct mmc *mmc)
349 {
350         debug("board_mmc_getcd called\n");
351         /*
352          * Hard-code CD presence for now. Need to add GPIO inputs
353          * for Seaboard & Harmony (& Kaen/Aebl/Wario?)
354          */
355         *cd = 1;
356         return 0;
357 }
358 #endif