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author | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
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committer | root <root@artemis.panaceas.org> | 2015-12-25 04:40:36 +0000 |
commit | 849369d6c66d3054688672f97d31fceb8e8230fb (patch) | |
tree | 6135abc790ca67dedbe07c39806591e70eda81ce /arch/arm/mach-w90x900/cpu.c | |
download | linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.gz linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.tar.bz2 linux-3.0.35-kobo-849369d6c66d3054688672f97d31fceb8e8230fb.zip |
initial_commit
Diffstat (limited to 'arch/arm/mach-w90x900/cpu.c')
-rw-r--r-- | arch/arm/mach-w90x900/cpu.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/arch/arm/mach-w90x900/cpu.c b/arch/arm/mach-w90x900/cpu.c new file mode 100644 index 00000000..83c56324 --- /dev/null +++ b/arch/arm/mach-w90x900/cpu.c @@ -0,0 +1,224 @@ +/* + * linux/arch/arm/mach-w90x900/cpu.c + * + * Copyright (c) 2009 Nuvoton corporation. + * + * Wan ZongShun <mcuos.com@gmail.com> + * + * NUC900 series cpu common support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation;version 2 of the License. + * + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/list.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/serial_8250.h> +#include <linux/delay.h> + +#include <asm/mach/arch.h> +#include <asm/mach/map.h> +#include <asm/mach/irq.h> +#include <asm/irq.h> + +#include <mach/hardware.h> +#include <mach/regs-serial.h> +#include <mach/regs-clock.h> +#include <mach/regs-ebi.h> + +#include "cpu.h" +#include "clock.h" + +/* Initial IO mappings */ + +static struct map_desc nuc900_iodesc[] __initdata = { + IODESC_ENT(IRQ), + IODESC_ENT(GCR), + IODESC_ENT(UART), + IODESC_ENT(TIMER), + IODESC_ENT(EBI), + IODESC_ENT(GPIO), +}; + +/* Initial clock declarations. */ +static DEFINE_CLK(lcd, 0); +static DEFINE_CLK(audio, 1); +static DEFINE_CLK(fmi, 4); +static DEFINE_SUBCLK(ms, 0); +static DEFINE_SUBCLK(sd, 1); +static DEFINE_CLK(dmac, 5); +static DEFINE_CLK(atapi, 6); +static DEFINE_CLK(emc, 7); +static DEFINE_SUBCLK(rmii, 2); +static DEFINE_CLK(usbd, 8); +static DEFINE_CLK(usbh, 9); +static DEFINE_CLK(g2d, 10);; +static DEFINE_CLK(pwm, 18); +static DEFINE_CLK(ps2, 24); +static DEFINE_CLK(kpi, 25); +static DEFINE_CLK(wdt, 26); +static DEFINE_CLK(gdma, 27); +static DEFINE_CLK(adc, 28); +static DEFINE_CLK(usi, 29); +static DEFINE_CLK(ext, 0); +static DEFINE_CLK(timer0, 19); +static DEFINE_CLK(timer1, 20); +static DEFINE_CLK(timer2, 21); +static DEFINE_CLK(timer3, 22); +static DEFINE_CLK(timer4, 23); + +static struct clk_lookup nuc900_clkregs[] = { + DEF_CLKLOOK(&clk_lcd, "nuc900-lcd", NULL), + DEF_CLKLOOK(&clk_audio, "nuc900-audio", NULL), + DEF_CLKLOOK(&clk_fmi, "nuc900-fmi", NULL), + DEF_CLKLOOK(&clk_ms, "nuc900-fmi", "MS"), + DEF_CLKLOOK(&clk_sd, "nuc900-fmi", "SD"), + DEF_CLKLOOK(&clk_dmac, "nuc900-dmac", NULL), + DEF_CLKLOOK(&clk_atapi, "nuc900-atapi", NULL), + DEF_CLKLOOK(&clk_emc, "nuc900-emc", NULL), + DEF_CLKLOOK(&clk_rmii, "nuc900-emc", "RMII"), + DEF_CLKLOOK(&clk_usbd, "nuc900-usbd", NULL), + DEF_CLKLOOK(&clk_usbh, "nuc900-usbh", NULL), + DEF_CLKLOOK(&clk_g2d, "nuc900-g2d", NULL), + DEF_CLKLOOK(&clk_pwm, "nuc900-pwm", NULL), + DEF_CLKLOOK(&clk_ps2, "nuc900-ps2", NULL), + DEF_CLKLOOK(&clk_kpi, "nuc900-kpi", NULL), + DEF_CLKLOOK(&clk_wdt, "nuc900-wdt", NULL), + DEF_CLKLOOK(&clk_gdma, "nuc900-gdma", NULL), + DEF_CLKLOOK(&clk_adc, "nuc900-ts", NULL), + DEF_CLKLOOK(&clk_usi, "nuc900-spi", NULL), + DEF_CLKLOOK(&clk_ext, NULL, "ext"), + DEF_CLKLOOK(&clk_timer0, NULL, "timer0"), + DEF_CLKLOOK(&clk_timer1, NULL, "timer1"), + DEF_CLKLOOK(&clk_timer2, NULL, "timer2"), + DEF_CLKLOOK(&clk_timer3, NULL, "timer3"), + DEF_CLKLOOK(&clk_timer4, NULL, "timer4"), +}; + +/* Initial serial platform data */ + +struct plat_serial8250_port nuc900_uart_data[] = { + NUC900_8250PORT(UART0), + {}, +}; + +struct platform_device nuc900_serial_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = nuc900_uart_data, + }, +}; + +/*Set NUC900 series cpu frequence*/ +static int __init nuc900_set_clkval(unsigned int cpufreq) +{ + unsigned int pllclk, ahbclk, apbclk, val; + + pllclk = 0; + ahbclk = 0; + apbclk = 0; + + switch (cpufreq) { + case 66: + pllclk = PLL_66MHZ; + ahbclk = AHB_CPUCLK_1_1; + apbclk = APB_AHB_1_2; + break; + + case 100: + pllclk = PLL_100MHZ; + ahbclk = AHB_CPUCLK_1_1; + apbclk = APB_AHB_1_2; + break; + + case 120: + pllclk = PLL_120MHZ; + ahbclk = AHB_CPUCLK_1_2; + apbclk = APB_AHB_1_2; + break; + + case 166: + pllclk = PLL_166MHZ; + ahbclk = AHB_CPUCLK_1_2; + apbclk = APB_AHB_1_2; + break; + + case 200: + pllclk = PLL_200MHZ; + ahbclk = AHB_CPUCLK_1_2; + apbclk = APB_AHB_1_2; + break; + } + + __raw_writel(pllclk, REG_PLLCON0); + + val = __raw_readl(REG_CLKDIV); + val &= ~(0x03 << 24 | 0x03 << 26); + val |= (ahbclk << 24 | apbclk << 26); + __raw_writel(val, REG_CLKDIV); + + return 0; +} +static int __init nuc900_set_cpufreq(char *str) +{ + unsigned long cpufreq, val; + + if (!*str) + return 0; + + strict_strtoul(str, 0, &cpufreq); + + nuc900_clock_source(NULL, "ext"); + + nuc900_set_clkval(cpufreq); + + mdelay(1); + + val = __raw_readl(REG_CKSKEW); + val &= ~0xff; + val |= DEFAULTSKEW; + __raw_writel(val, REG_CKSKEW); + + nuc900_clock_source(NULL, "pll0"); + + return 1; +} + +__setup("cpufreq=", nuc900_set_cpufreq); + +/*Init NUC900 evb io*/ + +void __init nuc900_map_io(struct map_desc *mach_desc, int mach_size) +{ + unsigned long idcode = 0x0; + + iotable_init(mach_desc, mach_size); + iotable_init(nuc900_iodesc, ARRAY_SIZE(nuc900_iodesc)); + + idcode = __raw_readl(NUC900PDID); + if (idcode == NUC910_CPUID) + printk(KERN_INFO "CPU type 0x%08lx is NUC910\n", idcode); + else if (idcode == NUC920_CPUID) + printk(KERN_INFO "CPU type 0x%08lx is NUC920\n", idcode); + else if (idcode == NUC950_CPUID) + printk(KERN_INFO "CPU type 0x%08lx is NUC950\n", idcode); + else if (idcode == NUC960_CPUID) + printk(KERN_INFO "CPU type 0x%08lx is NUC960\n", idcode); +} + +/*Init NUC900 clock*/ + +void __init nuc900_init_clocks(void) +{ + clkdev_add_table(nuc900_clkregs, ARRAY_SIZE(nuc900_clkregs)); +} + |