diff options
Diffstat (limited to 'arch/arm/cpu/arm920t/s3c24x0/usb.c')
| -rw-r--r-- | arch/arm/cpu/arm920t/s3c24x0/usb.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm920t/s3c24x0/usb.c b/arch/arm/cpu/arm920t/s3c24x0/usb.c new file mode 100644 index 0000000000..e468ed08fc --- /dev/null +++ b/arch/arm/cpu/arm920t/s3c24x0/usb.c @@ -0,0 +1,71 @@ +/* + * (C) Copyright 2006 + * DENX Software Engineering <mk@denx.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#if defined(CONFIG_USB_OHCI_NEW) && \ + defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \ + defined(CONFIG_S3C24X0) + +#include <asm/arch/s3c24x0_cpu.h> +#include <asm/io.h> + +int usb_cpu_init(void) +{ + struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); + struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio(); + + /* + * Set the 48 MHz UPLL clocking. Values are taken from + * "PLL value selection guide", 6-23, s3c2400_UM.pdf. + */ + writel((40 << 12) + (1 << 4) + 2, &clk_power->UPLLCON); + /* 1 = use pads related USB for USB host */ + writel(readl(&gpio->MISCCR) | 0x8, &gpio->MISCCR); + + /* + * Enable USB host clock. + */ + writel(readl(&clk_power->CLKCON) | (1 << 4), &clk_power->CLKCON); + + return 0; +} + +int usb_cpu_stop(void) +{ + struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); + /* may not want to do this */ + writel(readl(&clk_power->CLKCON) & ~(1 << 4), &clk_power->CLKCON); + return 0; +} + +int usb_cpu_init_fail(void) +{ + struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power(); + writel(readl(&clk_power->CLKCON) & ~(1 << 4), &clk_power->CLKCON); + return 0; +} + +#endif /* defined(CONFIG_USB_OHCI_NEW) && \ + defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \ + defined(CONFIG_S3C24X0) */ |
