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imx: reorganize IMX code as other SOCs
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1/*
2 * Copyright 2013 Freescale Semiconductor, Inc.
3 *
1a459660 4 * SPDX-License-Identifier: GPL-2.0+
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5 */
6
7#include <common.h>
8#include <asm/io.h>
9#include <asm/arch/imx-regs.h>
10#include <asm/arch/clock.h>
11#include <asm/arch/crm_regs.h>
552a848e 12#include <asm/mach-imx/sys_proto.h>
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13#include <netdev.h>
14#ifdef CONFIG_FSL_ESDHC
15#include <fsl_esdhc.h>
16#endif
17
18#ifdef CONFIG_FSL_ESDHC
19DECLARE_GLOBAL_DATA_PTR;
20#endif
21
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22static char soc_type[] = "xx0";
23
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24#ifdef CONFIG_MXC_OCOTP
25void enable_ocotp_clk(unsigned char enable)
26{
27 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
28 u32 reg;
29
30 reg = readl(&ccm->ccgr6);
31 if (enable)
32 reg |= CCM_CCGR6_OCOTP_CTRL_MASK;
33 else
34 reg &= ~CCM_CCGR6_OCOTP_CTRL_MASK;
35 writel(reg, &ccm->ccgr6);
36}
37#endif
38
39static u32 get_mcu_main_clk(void)
40{
41 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
42 u32 ccm_ccsr, ccm_cacrr, armclk_div;
43 u32 sysclk_sel, pll_pfd_sel = 0;
44 u32 freq = 0;
45
46 ccm_ccsr = readl(&ccm->ccsr);
47 sysclk_sel = ccm_ccsr & CCM_CCSR_SYS_CLK_SEL_MASK;
48 sysclk_sel >>= CCM_CCSR_SYS_CLK_SEL_OFFSET;
49
50 ccm_cacrr = readl(&ccm->cacrr);
51 armclk_div = ccm_cacrr & CCM_CACRR_ARM_CLK_DIV_MASK;
52 armclk_div >>= CCM_CACRR_ARM_CLK_DIV_OFFSET;
53 armclk_div += 1;
54
55 switch (sysclk_sel) {
56 case 0:
57 freq = FASE_CLK_FREQ;
58 break;
59 case 1:
60 freq = SLOW_CLK_FREQ;
61 break;
62 case 2:
63 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL2_PFD_CLK_SEL_MASK;
64 pll_pfd_sel >>= CCM_CCSR_PLL2_PFD_CLK_SEL_OFFSET;
65 if (pll_pfd_sel == 0)
66 freq = PLL2_MAIN_FREQ;
67 else if (pll_pfd_sel == 1)
68 freq = PLL2_PFD1_FREQ;
69 else if (pll_pfd_sel == 2)
70 freq = PLL2_PFD2_FREQ;
71 else if (pll_pfd_sel == 3)
72 freq = PLL2_PFD3_FREQ;
73 else if (pll_pfd_sel == 4)
74 freq = PLL2_PFD4_FREQ;
75 break;
76 case 3:
77 freq = PLL2_MAIN_FREQ;
78 break;
79 case 4:
80 pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL1_PFD_CLK_SEL_MASK;
81 pll_pfd_sel >>= CCM_CCSR_PLL1_PFD_CLK_SEL_OFFSET;
82 if (pll_pfd_sel == 0)
83 freq = PLL1_MAIN_FREQ;
84 else if (pll_pfd_sel == 1)
85 freq = PLL1_PFD1_FREQ;
86 else if (pll_pfd_sel == 2)
87 freq = PLL1_PFD2_FREQ;
88 else if (pll_pfd_sel == 3)
89 freq = PLL1_PFD3_FREQ;
90 else if (pll_pfd_sel == 4)
91 freq = PLL1_PFD4_FREQ;
92 break;
93 case 5:
94 freq = PLL3_MAIN_FREQ;
95 break;
96 default:
97 printf("unsupported system clock select\n");
98 }
99
100 return freq / armclk_div;
101}
102
103static u32 get_bus_clk(void)
104{
105 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
106 u32 ccm_cacrr, busclk_div;
107
108 ccm_cacrr = readl(&ccm->cacrr);
109
110 busclk_div = ccm_cacrr & CCM_CACRR_BUS_CLK_DIV_MASK;
111 busclk_div >>= CCM_CACRR_BUS_CLK_DIV_OFFSET;
112 busclk_div += 1;
113
114 return get_mcu_main_clk() / busclk_div;
115}
116
117static u32 get_ipg_clk(void)
118{
119 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
120 u32 ccm_cacrr, ipgclk_div;
121
122 ccm_cacrr = readl(&ccm->cacrr);
123
124 ipgclk_div = ccm_cacrr & CCM_CACRR_IPG_CLK_DIV_MASK;
125 ipgclk_div >>= CCM_CACRR_IPG_CLK_DIV_OFFSET;
126 ipgclk_div += 1;
127
128 return get_bus_clk() / ipgclk_div;
129}
130
131static u32 get_uart_clk(void)
132{
133 return get_ipg_clk();
134}
135
136static u32 get_sdhc_clk(void)
137{
138 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
139 u32 ccm_cscmr1, ccm_cscdr2, sdhc_clk_sel, sdhc_clk_div;
140 u32 freq = 0;
141
142 ccm_cscmr1 = readl(&ccm->cscmr1);
143 sdhc_clk_sel = ccm_cscmr1 & CCM_CSCMR1_ESDHC1_CLK_SEL_MASK;
144 sdhc_clk_sel >>= CCM_CSCMR1_ESDHC1_CLK_SEL_OFFSET;
145
146 ccm_cscdr2 = readl(&ccm->cscdr2);
147 sdhc_clk_div = ccm_cscdr2 & CCM_CSCDR2_ESDHC1_CLK_DIV_MASK;
148 sdhc_clk_div >>= CCM_CSCDR2_ESDHC1_CLK_DIV_OFFSET;
149 sdhc_clk_div += 1;
150
151 switch (sdhc_clk_sel) {
152 case 0:
153 freq = PLL3_MAIN_FREQ;
154 break;
155 case 1:
156 freq = PLL3_PFD3_FREQ;
157 break;
158 case 2:
159 freq = PLL1_PFD3_FREQ;
160 break;
161 case 3:
162 freq = get_bus_clk();
163 break;
164 }
165
166 return freq / sdhc_clk_div;
167}
168
169u32 get_fec_clk(void)
170{
171 struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
172 u32 ccm_cscmr2, rmii_clk_sel;
173 u32 freq = 0;
174
175 ccm_cscmr2 = readl(&ccm->cscmr2);
176 rmii_clk_sel = ccm_cscmr2 & CCM_CSCMR2_RMII_CLK_SEL_MASK;
177 rmii_clk_sel >>= CCM_CSCMR2_RMII_CLK_SEL_OFFSET;
178
179 switch (rmii_clk_sel) {
180 case 0:
181 freq = ENET_EXTERNAL_CLK;
182 break;
183 case 1:
184 freq = AUDIO_EXTERNAL_CLK;
185 break;
186 case 2:
187 freq = PLL5_MAIN_FREQ;
188 break;
189 case 3:
190 freq = PLL5_MAIN_FREQ / 2;
191 break;
192 }
193
194 return freq;
195}
196
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197static u32 get_i2c_clk(void)
198{
199 return get_ipg_clk();
200}
201
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202static u32 get_dspi_clk(void)
203{
204 return get_ipg_clk();
205}
206
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207u32 get_lpuart_clk(void)
208{
209 return get_uart_clk();
210}
211
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212unsigned int mxc_get_clock(enum mxc_clock clk)
213{
214 switch (clk) {
215 case MXC_ARM_CLK:
216 return get_mcu_main_clk();
217 case MXC_BUS_CLK:
218 return get_bus_clk();
219 case MXC_IPG_CLK:
220 return get_ipg_clk();
221 case MXC_UART_CLK:
222 return get_uart_clk();
223 case MXC_ESDHC_CLK:
224 return get_sdhc_clk();
225 case MXC_FEC_CLK:
226 return get_fec_clk();
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227 case MXC_I2C_CLK:
228 return get_i2c_clk();
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229 case MXC_DSPI_CLK:
230 return get_dspi_clk();
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231 default:
232 break;
233 }
234 return -1;
235}
236
237/* Dump some core clocks */
238int do_vf610_showclocks(cmd_tbl_t *cmdtp, int flag, int argc,
239 char * const argv[])
240{
241 printf("\n");
242 printf("cpu clock : %8d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
243 printf("bus clock : %8d MHz\n", mxc_get_clock(MXC_BUS_CLK) / 1000000);
244 printf("ipg clock : %8d MHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000000);
245
246 return 0;
247}
248
249U_BOOT_CMD(
250 clocks, CONFIG_SYS_MAXARGS, 1, do_vf610_showclocks,
251 "display clocks",
252 ""
253);
254
255#ifdef CONFIG_FEC_MXC
256void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
257{
258 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
259 struct fuse_bank *bank = &ocotp->bank[4];
260 struct fuse_bank4_regs *fuse =
261 (struct fuse_bank4_regs *)bank->fuse_regs;
262
263 u32 value = readl(&fuse->mac_addr0);
264 mac[0] = (value >> 8);
265 mac[1] = value;
266
267 value = readl(&fuse->mac_addr1);
268 mac[2] = value >> 24;
269 mac[3] = value >> 16;
270 mac[4] = value >> 8;
271 mac[5] = value;
272}
273#endif
274
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275u32 get_cpu_rev(void)
276{
277 return MXC_CPU_VF610 << 12;
278}
279
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280#if defined(CONFIG_DISPLAY_CPUINFO)
281static char *get_reset_cause(void)
282{
283 u32 cause;
284 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
285
286 cause = readl(&src_regs->srsr);
287 writel(cause, &src_regs->srsr);
24e8bee5 288
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289 if (cause & SRC_SRSR_POR_RST)
290 return "POWER ON RESET";
291 else if (cause & SRC_SRSR_WDOG_A5)
292 return "WDOG A5";
293 else if (cause & SRC_SRSR_WDOG_M4)
294 return "WDOG M4";
295 else if (cause & SRC_SRSR_JTAG_RST)
24e8bee5 296 return "JTAG HIGH-Z";
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297 else if (cause & SRC_SRSR_SW_RST)
298 return "SW RESET";
299 else if (cause & SRC_SRSR_RESETB)
24e8bee5 300 return "EXTERNAL RESET";
9e89a64f 301 else
24e8bee5 302 return "unknown reset";
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303}
304
305int print_cpuinfo(void)
306{
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307 printf("CPU: Freescale Vybrid VF%s at %d MHz\n",
308 soc_type, mxc_get_clock(MXC_ARM_CLK) / 1000000);
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309 printf("Reset cause: %s\n", get_reset_cause());
310
311 return 0;
312}
313#endif
314
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315int arch_cpu_init(void)
316{
317 struct mscm *mscm = (struct mscm *)MSCM_BASE_ADDR;
318
319 soc_type[0] = mscm->cpxcount ? '6' : '5'; /*Dual Core => VF6x0 */
320 soc_type[1] = mscm->cpxcfg1 ? '1' : '0'; /* L2 Cache => VFx10 */
321
322 return 0;
323}
324
325#ifdef CONFIG_ARCH_MISC_INIT
326int arch_misc_init(void)
327{
328 char soc[6];
329
d7255e8d 330 strcpy(soc, "vf");
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331 strcat(soc, soc_type);
332 setenv("soc", soc);
333
334 return 0;
335}
336#endif
337
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338int cpu_eth_init(bd_t *bis)
339{
340 int rc = -ENODEV;
341
342#if defined(CONFIG_FEC_MXC)
343 rc = fecmxc_initialize(bis);
344#endif
345
346 return rc;
347}
348
349#ifdef CONFIG_FSL_ESDHC
350int cpu_mmc_init(bd_t *bis)
351{
352 return fsl_esdhc_mmc_init(bis);
353}
354#endif
355
356int get_clocks(void)
357{
358#ifdef CONFIG_FSL_ESDHC
359 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
360#endif
361 return 0;
362}
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363
364#ifndef CONFIG_SYS_DCACHE_OFF
365void enable_caches(void)
366{
367#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
368 enum dcache_option option = DCACHE_WRITETHROUGH;
369#else
370 enum dcache_option option = DCACHE_WRITEBACK;
371#endif
372 dcache_enable();
373 icache_enable();
374
375 /* Enable caching on OCRAM */
376 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE, option);
377}
378#endif
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