diff options
author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-07-04 03:55:23 +0000 |
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committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-07-04 03:55:23 +0000 |
commit | 488a32cc9bb1febbbe4bc2bae804827cbeb9e27e (patch) | |
tree | 803e78185260317fee8cebd41718bf8d6b81151f /target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c | |
parent | 48b9894bf62622057aa223276b3659e2109f09c9 (diff) |
refactor atheros system code - also add support for the reset button (sends netlink messages in the same format as broadcom-diag)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7869 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c')
-rw-r--r-- | target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c b/target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c new file mode 100644 index 000000000..8247d8548 --- /dev/null +++ b/target/linux/atheros-2.6/files/arch/mips/atheros/ar5315/board.c @@ -0,0 +1,366 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Platform devices for Atheros SoCs + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/kernel.h> +#include <linux/reboot.h> +#include <asm/bootinfo.h> +#include <asm/reboot.h> +#include <asm/time.h> +#include <asm/irq.h> +#include <asm/io.h> +#include "../ar531x.h" + +static int is_5315 = 0; + +static struct resource ar5315_eth_res[] = { + { + .name = "eth0_membase", + .flags = IORESOURCE_MEM, + .start = AR5315_ENET0, + .end = AR5315_ENET0 + 0x2000, + }, + { + .name = "eth0_irq", + .flags = IORESOURCE_IRQ, + .start = AR5315_IRQ_ENET0_INTRS, + .end = AR5315_IRQ_ENET0_INTRS, + }, +}; + +static struct ar531x_eth ar5315_eth_data = { + .phy = 1, + .mac = 0, + .reset_base = AR5315_RESET, + .reset_mac = AR5315_RESET_ENET0, + .reset_phy = AR5315_RESET_EPHY0, + .phy_base = AR5315_ENET0 +}; + +static struct platform_device ar5315_eth = { + .id = 0, + .name = "ar531x-eth", + .dev.platform_data = &ar5315_eth_data, + .resource = ar5315_eth_res, + .num_resources = ARRAY_SIZE(ar5315_eth_res) +}; + +static struct platform_device ar5315_wmac = { + .id = 0, + .name = "ar531x-wmac", + /* FIXME: add resources */ +}; + +static struct resource ar5315_spiflash_res[] = { + { + .name = "flash_base", + .flags = IORESOURCE_MEM, + .start = KSEG1ADDR(AR5315_SPI_READ), + .end = KSEG1ADDR(AR5315_SPI_READ) + 0x800000, + }, + { + .name = "flash_regs", + .flags = IORESOURCE_MEM, + .start = 0x11300000, + .end = 0x11300012, + }, +}; + +static struct platform_device ar5315_spiflash = { + .id = 0, + .name = "spiflash", + .resource = ar5315_spiflash_res, + .num_resources = ARRAY_SIZE(ar5315_spiflash_res) +}; + +static __initdata struct platform_device *ar5315_devs[4]; + + + +static void *flash_regs; + +static inline __u32 spiflash_regread32(int reg) +{ + volatile __u32 *data = (__u32 *)(flash_regs + reg); + + return (*data); +} + +static inline void spiflash_regwrite32(int reg, __u32 data) +{ + volatile __u32 *addr = (__u32 *)(flash_regs + reg); + + *addr = data; +} + +#define SPI_FLASH_CTL 0x00 +#define SPI_FLASH_OPCODE 0x04 +#define SPI_FLASH_DATA 0x08 + +static __u8 spiflash_probe(void) +{ + __u32 reg; + + do { + reg = spiflash_regread32(SPI_FLASH_CTL); + } while (reg & SPI_CTL_BUSY); + + spiflash_regwrite32(SPI_FLASH_OPCODE, 0xab); + + reg = (reg & ~SPI_CTL_TX_RX_CNT_MASK) | 4 | + (1 << 4) | SPI_CTL_START; + + spiflash_regwrite32(SPI_FLASH_CTL, reg); + + do { + reg = spiflash_regread32(SPI_FLASH_CTL); + } while (reg & SPI_CTL_BUSY); + + reg = (__u32) spiflash_regread32(SPI_FLASH_DATA); + reg &= 0xff; + + return (u8) reg; +} + + +#define STM_8MBIT_SIGNATURE 0x13 +#define STM_16MBIT_SIGNATURE 0x14 +#define STM_32MBIT_SIGNATURE 0x15 +#define STM_64MBIT_SIGNATURE 0x16 +#define STM_128MBIT_SIGNATURE 0x17 + + +static char __init *ar5315_flash_limit(void) +{ + u8 sig; + u32 flash_size = 0; + + /* probe the flash chip size */ + flash_regs = ioremap_nocache(ar5315_spiflash_res[1].start, ar5315_spiflash_res[1].end - ar5315_spiflash_res[1].start); + sig = spiflash_probe(); + iounmap(flash_regs); + + switch(sig) { + case STM_8MBIT_SIGNATURE: + flash_size = 0x00100000; + break; + case STM_16MBIT_SIGNATURE: + flash_size = 0x00200000; + break; + case STM_32MBIT_SIGNATURE: + flash_size = 0x00400000; + break; + case STM_64MBIT_SIGNATURE: + flash_size = 0x00800000; + break; + case STM_128MBIT_SIGNATURE: + flash_size = 0x01000000; + break; + } + + ar5315_spiflash_res[0].end = ar5315_spiflash_res[0].start + flash_size; + return (char *) ar5315_spiflash_res[0].end; +} + +int __init ar5315_init_devices(void) +{ + struct ar531x_config *config; + struct ar531x_boarddata *bcfg; + int dev = 0; + + if (!is_5315) + return 0; + + /* Find board configuration */ + ar531x_find_config(ar5315_flash_limit()); + bcfg = (struct ar531x_boarddata *) board_config; + +#if 0 + { + /* Detect the hardware based on the device ID */ + u32 devid = sysRegRead(AR5315_SREV) & AR5315_REV_MAJ >> AR5315_REV_MAJ_S; + switch(devid) { + case 0x9: + mips_machtype = MACH_ATHEROS_AR2317; + break; + /* FIXME: how can we detect AR2316? */ + case 0x8: + default: + mips_machtype = MACH_ATHEROS_AR2315; + break; + } + } +#endif + + config = (struct ar531x_config *) kzalloc(sizeof(struct ar531x_config), GFP_KERNEL); + config->board = board_config; + config->radio = radio_config; + config->unit = 0; + config->tag = (u_int16_t) (sysRegRead(AR5315_SREV) & AR5315_REV_CHIP); + + ar5315_eth_data.board_config = board_config; + ar5315_eth_data.macaddr = bcfg->enet0Mac; + ar5315_wmac.dev.platform_data = config; + + ar5315_devs[dev++] = &ar5315_eth; + ar5315_devs[dev++] = &ar5315_wmac; + ar5315_devs[dev++] = &ar5315_spiflash; + + + return platform_add_devices(ar5315_devs, dev); +} + +static void ar5315_halt(void) +{ + while (1); +} + +static void ar5315_power_off(void) +{ + ar5315_halt(); +} + + +static void ar5315_restart(char *command) +{ + unsigned int reg; + for(;;) { + + /* reset the system */ + sysRegWrite(AR5315_COLD_RESET,AR5317_RESET_SYSTEM); + + /* + * Cold reset does not work on the AR2315/6, use the GPIO reset bits a workaround. + */ + + reg = sysRegRead(AR5315_GPIO_DO); + reg &= ~(1 << AR5315_RESET_GPIO); + sysRegWrite(AR5315_GPIO_DO, reg); + (void)sysRegRead(AR5315_GPIO_DO); /* flush write to hardware */ + } +} + + +/* + * This table is indexed by bits 5..4 of the CLOCKCTL1 register + * to determine the predevisor value. + */ +static int __initdata CLOCKCTL1_PREDIVIDE_TABLE[4] = { + 1, + 2, + 4, + 5 +}; + +static int __initdata PLLC_DIVIDE_TABLE[5] = { + 2, + 3, + 4, + 6, + 3 +}; + +static unsigned int __init +ar5315_sys_clk(unsigned int clockCtl) +{ + unsigned int pllcCtrl,cpuDiv; + unsigned int pllcOut,refdiv,fdiv,divby2; + unsigned int clkDiv; + + pllcCtrl = sysRegRead(AR5315_PLLC_CTL); + refdiv = (pllcCtrl & PLLC_REF_DIV_M) >> PLLC_REF_DIV_S; + refdiv = CLOCKCTL1_PREDIVIDE_TABLE[refdiv]; + fdiv = (pllcCtrl & PLLC_FDBACK_DIV_M) >> PLLC_FDBACK_DIV_S; + divby2 = (pllcCtrl & PLLC_ADD_FDBACK_DIV_M) >> PLLC_ADD_FDBACK_DIV_S; + divby2 += 1; + pllcOut = (40000000/refdiv)*(2*divby2)*fdiv; + + + /* clkm input selected */ + switch(clockCtl & CPUCLK_CLK_SEL_M) { + case 0: + case 1: + clkDiv = PLLC_DIVIDE_TABLE[(pllcCtrl & PLLC_CLKM_DIV_M) >> PLLC_CLKM_DIV_S]; + break; + case 2: + clkDiv = PLLC_DIVIDE_TABLE[(pllcCtrl & PLLC_CLKC_DIV_M) >> PLLC_CLKC_DIV_S]; + break; + default: + pllcOut = 40000000; + clkDiv = 1; + break; + } + cpuDiv = (clockCtl & CPUCLK_CLK_DIV_M) >> CPUCLK_CLK_DIV_S; + cpuDiv = cpuDiv * 2 ?: 1; + return (pllcOut/(clkDiv * cpuDiv)); +} + +static inline unsigned int ar5315_cpu_frequency(void) +{ + return ar5315_sys_clk(sysRegRead(AR5315_CPUCLK)); +} + +static inline unsigned int ar5315_apb_frequency(void) +{ + return ar5315_sys_clk(sysRegRead(AR5315_AMBACLK)); +} + +static void __init ar5315_time_init(void) +{ + mips_hpt_frequency = ar5315_cpu_frequency() / 2; +} + +void __init ar5315_prom_init(void) +{ + u32 memsize, memcfg; + + is_5315 = 1; + memcfg = sysRegRead(AR5315_MEM_CFG); + memsize = 1 + ((memcfg & SDRAM_DATA_WIDTH_M) >> SDRAM_DATA_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_COL_WIDTH_M) >> SDRAM_COL_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_ROW_WIDTH_M) >> SDRAM_ROW_WIDTH_S); + memsize <<= 3; + add_memory_region(0, memsize, BOOT_MEM_RAM); + + /* Initialize it to AR2315 for now. Real detection will be done + * in ar5315_init_devices() */ + mips_machtype = MACH_ATHEROS_AR2315; +} + +void __init ar5315_plat_setup(void) +{ + unsigned int config = read_c0_config(); + + /* Clear any lingering AHB errors */ + write_c0_config(config & ~0x3); + sysRegWrite(AR5315_AHB_ERR0,AHB_ERROR_DET); + sysRegRead(AR5315_AHB_ERR1); + sysRegWrite(AR5315_WDC, WDC_IGNORE_EXPIRATION); + + board_time_init = ar5315_time_init; + + _machine_restart = ar5315_restart; + _machine_halt = ar5315_halt; + pm_power_off = ar5315_power_off; + + serial_setup(KSEG1ADDR(AR5315_UART0), ar5315_apb_frequency()); +} + +arch_initcall(ar5315_init_devices); |