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fec_mxc: cleanup and factor out MX27 dependencies
[people/ms/u-boot.git] / cpu / arm926ejs / mx27 / generic.c
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1/*
2 * Copyright (c) 2008 Eric Jarrige <eric.jarrige@armadeus.org>
3 * Copyright (c) 2009 Ilya Yanok <yanok@emcraft.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
18 * MA 02111-1307 USA
19 */
20
21#include <common.h>
22#include <div64.h>
0b23fb36 23#include <netdev.h>
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24#include <asm/io.h>
25#include <asm/arch/imx-regs.h>
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26#ifdef CONFIG_MXC_MMC
27#include <asm/arch/mxcmmc.h>
28#endif
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29
30/*
31 * get the system pll clock in Hz
32 *
33 * mfi + mfn / (mfd +1)
34 * f = 2 * f_ref * --------------------
35 * pd + 1
36 */
37unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
38{
39 unsigned int mfi = (pll >> 10) & 0xf;
40 unsigned int mfn = pll & 0x3ff;
41 unsigned int mfd = (pll >> 16) & 0x3ff;
42 unsigned int pd = (pll >> 26) & 0xf;
43
44 mfi = mfi <= 5 ? 5 : mfi;
45
46 return lldiv(2 * (u64)f_ref * (mfi * (mfd + 1) + mfn),
47 (mfd + 1) * (pd + 1));
48}
49
50static ulong clk_in_32k(void)
51{
52 return 1024 * CONFIG_MX27_CLK32;
53}
54
55static ulong clk_in_26m(void)
56{
57 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
58
59 if (readl(&pll->cscr) & CSCR_OSC26M_DIV1P5) {
60 /* divide by 1.5 */
61 return 26000000 * 2 / 3;
62 } else {
63 return 26000000;
64 }
65}
66
67ulong imx_get_mpllclk(void)
68{
69 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
70 ulong cscr = readl(&pll->cscr);
71 ulong fref;
72
73 if (cscr & CSCR_MCU_SEL)
74 fref = clk_in_26m();
75 else
76 fref = clk_in_32k();
77
78 return imx_decode_pll(readl(&pll->mpctl0), fref);
79}
80
81ulong imx_get_armclk(void)
82{
83 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
84 ulong cscr = readl(&pll->cscr);
85 ulong fref = imx_get_mpllclk();
86 ulong div;
87
88 if (!(cscr & CSCR_ARM_SRC_MPLL))
89 fref = lldiv((fref * 2), 3);
90
91 div = ((cscr >> 12) & 0x3) + 1;
92
93 return lldiv(fref, div);
94}
95
96ulong imx_get_ahbclk(void)
97{
98 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
99 ulong cscr = readl(&pll->cscr);
100 ulong fref = imx_get_mpllclk();
101 ulong div;
102
103 div = ((cscr >> 8) & 0x3) + 1;
104
105 return lldiv(fref * 2, 3 * div);
106}
107
108ulong imx_get_spllclk(void)
109{
110 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
111 ulong cscr = readl(&pll->cscr);
112 ulong fref;
113
114 if (cscr & CSCR_SP_SEL)
115 fref = clk_in_26m();
116 else
117 fref = clk_in_32k();
118
119 return imx_decode_pll(readl(&pll->spctl0), fref);
120}
121
122static ulong imx_decode_perclk(ulong div)
123{
124 return lldiv((imx_get_mpllclk() * 2), (div * 3));
125}
126
127ulong imx_get_perclk1(void)
128{
129 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
130
131 return imx_decode_perclk((readl(&pll->pcdr1) & 0x3f) + 1);
132}
133
134ulong imx_get_perclk2(void)
135{
136 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
137
138 return imx_decode_perclk(((readl(&pll->pcdr1) >> 8) & 0x3f) + 1);
139}
140
141ulong imx_get_perclk3(void)
142{
143 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
144
145 return imx_decode_perclk(((readl(&pll->pcdr1) >> 16) & 0x3f) + 1);
146}
147
148ulong imx_get_perclk4(void)
149{
150 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
151
152 return imx_decode_perclk(((readl(&pll->pcdr1) >> 24) & 0x3f) + 1);
153}
154
155#if defined(CONFIG_DISPLAY_CPUINFO)
156int print_cpuinfo (void)
157{
158 char buf[32];
159
160 printf("CPU: Freescale i.MX27 at %s MHz\n\n",
161 strmhz(buf, imx_get_mpllclk()));
162 return 0;
163}
164#endif
165
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166int cpu_eth_init(bd_t *bis)
167{
168#if defined(CONFIG_FEC_MXC)
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169 struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
170
171 /* enable FEC clock */
172 writel(readl(&pll->pccr1) | PCCR1_HCLK_FEC, &pll->pccr1);
173 writel(readl(&pll->pccr0) | PCCR0_FEC_EN, &pll->pccr0);
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174 return fecmxc_initialize(bis);
175#else
176 return 0;
177#endif
178}
179
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180/*
181 * Initializes on-chip MMC controllers.
182 * to override, implement board_mmc_init()
183 */
184int cpu_mmc_init(bd_t *bis)
185{
186#ifdef CONFIG_MXC_MMC
187 return mxc_mmc_init(bis);
188#else
189 return 0;
190#endif
191}
192
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193void imx_gpio_mode(int gpio_mode)
194{
195 struct gpio_regs *regs = (struct gpio_regs *)IMX_GPIO_BASE;
196 unsigned int pin = gpio_mode & GPIO_PIN_MASK;
197 unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
198 unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
199 unsigned int aout = (gpio_mode & GPIO_AOUT_MASK) >> GPIO_AOUT_SHIFT;
200 unsigned int bout = (gpio_mode & GPIO_BOUT_MASK) >> GPIO_BOUT_SHIFT;
201 unsigned int tmp;
202
203 /* Pullup enable */
204 if (gpio_mode & GPIO_PUEN) {
205 writel(readl(&regs->port[port].puen) | (1 << pin),
206 &regs->port[port].puen);
207 } else {
208 writel(readl(&regs->port[port].puen) & ~(1 << pin),
209 &regs->port[port].puen);
210 }
211
212 /* Data direction */
213 if (gpio_mode & GPIO_OUT) {
214 writel(readl(&regs->port[port].ddir) | 1 << pin,
215 &regs->port[port].ddir);
216 } else {
217 writel(readl(&regs->port[port].ddir) & ~(1 << pin),
218 &regs->port[port].ddir);
219 }
220
221 /* Primary / alternate function */
222 if (gpio_mode & GPIO_AF) {
223 writel(readl(&regs->port[port].gpr) | (1 << pin),
224 &regs->port[port].gpr);
225 } else {
226 writel(readl(&regs->port[port].gpr) & ~(1 << pin),
227 &regs->port[port].gpr);
228 }
229
230 /* use as gpio? */
231 if (!(gpio_mode & (GPIO_PF | GPIO_AF))) {
232 writel(readl(&regs->port[port].gius) | (1 << pin),
233 &regs->port[port].gius);
234 } else {
235 writel(readl(&regs->port[port].gius) & ~(1 << pin),
236 &regs->port[port].gius);
237 }
238
239 /* Output / input configuration */
240 if (pin < 16) {
241 tmp = readl(&regs->port[port].ocr1);
242 tmp &= ~(3 << (pin * 2));
243 tmp |= (ocr << (pin * 2));
244 writel(tmp, &regs->port[port].ocr1);
245
246 writel(readl(&regs->port[port].iconfa1) & ~(3 << (pin * 2)),
247 &regs->port[port].iconfa1);
248 writel(readl(&regs->port[port].iconfa1) | aout << (pin * 2),
249 &regs->port[port].iconfa1);
250 writel(readl(&regs->port[port].iconfb1) & ~(3 << (pin * 2)),
251 &regs->port[port].iconfb1);
252 writel(readl(&regs->port[port].iconfb1) | bout << (pin * 2),
253 &regs->port[port].iconfb1);
254 } else {
255 pin -= 16;
256
257 tmp = readl(&regs->port[port].ocr2);
258 tmp &= ~(3 << (pin * 2));
259 tmp |= (ocr << (pin * 2));
260 writel(tmp, &regs->port[port].ocr2);
261
262 writel(readl(&regs->port[port].iconfa2) & ~(3 << (pin * 2)),
263 &regs->port[port].iconfa2);
264 writel(readl(&regs->port[port].iconfa2) | aout << (pin * 2),
265 &regs->port[port].iconfa2);
266 writel(readl(&regs->port[port].iconfb2) & ~(3 << (pin * 2)),
267 &regs->port[port].iconfb2);
268 writel(readl(&regs->port[port].iconfb2) | bout << (pin * 2),
269 &regs->port[port].iconfb2);
270 }
271}
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272
273#ifdef CONFIG_MXC_UART
274void mx27_uart_init_pins(void)
275{
276 int i;
277 unsigned int mode[] = {
278 PE12_PF_UART1_TXD,
279 PE13_PF_UART1_RXD,
280 };
281
282 for (i = 0; i < ARRAY_SIZE(mode); i++)
283 imx_gpio_mode(mode[i]);
284
285}
286#endif /* CONFIG_MXC_UART */
287
288#ifdef CONFIG_FEC_MXC
289void mx27_fec_init_pins(void)
290{
291 int i;
292 unsigned int mode[] = {
293 PD0_AIN_FEC_TXD0,
294 PD1_AIN_FEC_TXD1,
295 PD2_AIN_FEC_TXD2,
296 PD3_AIN_FEC_TXD3,
297 PD4_AOUT_FEC_RX_ER,
298 PD5_AOUT_FEC_RXD1,
299 PD6_AOUT_FEC_RXD2,
300 PD7_AOUT_FEC_RXD3,
301 PD8_AF_FEC_MDIO,
302 PD9_AIN_FEC_MDC | GPIO_PUEN,
303 PD10_AOUT_FEC_CRS,
304 PD11_AOUT_FEC_TX_CLK,
305 PD12_AOUT_FEC_RXD0,
306 PD13_AOUT_FEC_RX_DV,
307 PD14_AOUT_FEC_CLR,
308 PD15_AOUT_FEC_COL,
309 PD16_AIN_FEC_TX_ER,
310 PF23_AIN_FEC_TX_EN,
311 };
312
313 for (i = 0; i < ARRAY_SIZE(mode); i++)
314 imx_gpio_mode(mode[i]);
315}
316#endif /* CONFIG_FEC_MXC */
317
318#ifdef CONFIG_MXC_MMC
319void mx27_sd2_init_pins(void)
320{
321 int i;
322 unsigned int mode[] = {
323 PB4_PF_SD2_D0,
324 PB5_PF_SD2_D1,
325 PB6_PF_SD2_D2,
326 PB7_PF_SD2_D3,
327 PB8_PF_SD2_CMD,
328 PB9_PF_SD2_CLK,
329 };
330
331 for (i = 0; i < ARRAY_SIZE(mode); i++)
332 imx_gpio_mode(mode[i]);
333
334}
335#endif /* CONFIG_MXC_MMC */