diff options
Diffstat (limited to 'src/mainboard/google/urara/bootblock.c')
| -rw-r--r-- | src/mainboard/google/urara/bootblock.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/mainboard/google/urara/bootblock.c b/src/mainboard/google/urara/bootblock.c new file mode 100644 index 0000000000..56177da7f4 --- /dev/null +++ b/src/mainboard/google/urara/bootblock.c @@ -0,0 +1,142 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Imagination Technologies + * + * 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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include <arch/io.h> +#include <stdint.h> +#include <soc/clocks.h> +#include <console/console.h> + +#define GPIO_BIT_EN_ADDR(bank) (0xB8101C00 + 0x200 + (0x24 * (bank))) + +/* MFIO definitions for UART0/1 */ +#define UART1_RXD_MFIO 59 +#define UART1_TXD_MFIO 60 +#define UART0_RXD_MFIO 55 +#define UART0_TXD_MFIO 56 +#define UART0_RTS_MFIO 57 +#define UART0_CTS_MFIO 58 + +/* MFIO definitions for SPIM */ +#define SPIM1_D0_TXD_MFIO 5 +#define SPIM1_D1_RXD_MFIO 4 +#define SPIM1_MCLK_MFIO 3 +#define SPIM1_D2_MFIO 6 +#define SPIM1_D3_MFIO 7 +#define SPIM1_CS0_MFIO 0 + +static void uart1_mfio_setup(void) +{ + u32 reg, mfio_mask; + + /* + * Disable GPIO for UART1 MFIOs + * All UART MFIOs have MFIO/16 = 3, therefore we use GPIO pad 3 + * This is the primary function (0) of these MFIOs and therfore there + * is no need to set up a function number in the corresponding + * function select register. + */ + reg = read32(GPIO_BIT_EN_ADDR(3)); + mfio_mask = 1 << (UART1_RXD_MFIO % 16); + mfio_mask |= 1 << (UART1_TXD_MFIO % 16); + /* Clear relevant bits */ + reg &= ~mfio_mask; + /* + * Set corresponding bits in the upper half word + * in order to be able to modify the chosen pins + */ + reg |= mfio_mask << 16; + write32(GPIO_BIT_EN_ADDR(3), reg); +} + +static void spim1_mfio_setup(void) +{ + u32 reg, mfio_mask; + /* + * Disable GPIO for SPIM1 MFIOs + * All SPFI1 MFIOs have MFIO/16 = 0, therefore we use GPIO pad 0 + * This is the primary function (0) of these MFIOs and therfore there + * is no need to set up a function number in the corresponding + * function select register. + */ + reg = read32(GPIO_BIT_EN_ADDR(0)); + + /* Disable GPIO for UART0 MFIOs */ + mfio_mask = 1 << (SPIM1_D0_TXD_MFIO % 16); + mfio_mask |= 1 << (SPIM1_D1_RXD_MFIO % 16); + mfio_mask |= 1 << (SPIM1_MCLK_MFIO % 16); + mfio_mask |= 1 << (SPIM1_D2_MFIO % 16); + mfio_mask |= 1 << (SPIM1_D3_MFIO % 16); + + /* TODO: for the moment it only sets up CS0 (NOR) */ + /* There is no need for other CS lines in Coreboot */ + mfio_mask |= 1 << (SPIM1_CS0_MFIO % 16); + + /* Clear relevant bits */ + reg &= ~mfio_mask; + /* + * Set corresponding bits in the upper half word + * in order to be able to modify the chosen pins + */ + reg |= mfio_mask << 16; + write32(GPIO_BIT_EN_ADDR(0), reg); +} + +static int init_clocks(void) +{ + int ret; + + /* + * Set up dividers for peripherals before setting up PLLs + * in order to not over-clock them when enabling PLLs + */ + + /* System PLL divided by 2 -> 400 MHz */ + /* The same frequency will be the input frequency for the SPFI block */ + system_clk_setup(1); + /* System clock divided by 8 -> 50 MHz */ + ret = usb_clk_setup(7, 2, 7); + if (ret != CLOCKS_OK) + return ret; + /* System PLL divided by 7 divided by 62 -> 1.8433 Mhz */ + uart1_clk_setup(6, 61); + + /* Setup system PLL at 800 MHz */ + ret = sys_pll_setup(2, 1); + if (ret != CLOCKS_OK) + return ret; + /* Setup MIPS PLL at 550 MHz */ + ret = mips_pll_setup(2, 1, 13, 275); + if (ret != CLOCKS_OK) + return ret; + return CLOCKS_OK; +} + +static void bootblock_mainboard_init(void) +{ + if (!init_clocks()) { + /* Disable GPIO on the peripheral lines */ + uart1_mfio_setup(); + printk(BIOS_INFO, "Urara board: UART initialized!\n"); + + spim1_mfio_setup(); + } + +} |