diff options
Diffstat (limited to 'target/linux/lantiq/files/arch/mips/lantiq/falcon/devices.c')
| -rw-r--r-- | target/linux/lantiq/files/arch/mips/lantiq/falcon/devices.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/target/linux/lantiq/files/arch/mips/lantiq/falcon/devices.c b/target/linux/lantiq/files/arch/mips/lantiq/falcon/devices.c new file mode 100644 index 000000000..e684ed470 --- /dev/null +++ b/target/linux/lantiq/files/arch/mips/lantiq/falcon/devices.c @@ -0,0 +1,152 @@ +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * Copyright (C) 2011 Thomas Langer <thomas.langer@lantiq.com> + * Copyright (C) 2011 John Crispin <blogic@openwrt.org> + */ + +#include <linux/platform_device.h> +#include <linux/mtd/nand.h> +#include <linux/gpio.h> + +#include <lantiq_soc.h> + +#include "devices.h" + +/* nand flash */ +/* address lines used for NAND control signals */ +#define NAND_ADDR_ALE 0x10000 +#define NAND_ADDR_CLE 0x20000 +/* Ready/Busy Status */ +#define MODCON_STS 0x0002 +/* Ready/Busy Status Edge */ +#define MODCON_STSEDGE 0x0004 + +static const char *part_probes[] = { "cmdlinepart", NULL }; + +static int +falcon_nand_ready(struct mtd_info *mtd) +{ + u32 modcon = ltq_ebu_r32(LTQ_EBU_MODCON); + + return (((modcon & (MODCON_STS | MODCON_STSEDGE)) == + (MODCON_STS | MODCON_STSEDGE))); +} + +static void +falcon_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *this = mtd->priv; + unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; + + if (ctrl & NAND_CTRL_CHANGE) { + nandaddr &= ~(NAND_ADDR_ALE | NAND_ADDR_CLE); + + if (ctrl & NAND_CLE) + nandaddr |= NAND_ADDR_CLE; + if (ctrl & NAND_ALE) + nandaddr |= NAND_ADDR_ALE; + + this->IO_ADDR_W = (void __iomem *) nandaddr; + } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); +} + +static struct platform_nand_data falcon_flash_nand_data = { + .chip = { + .nr_chips = 1, + .chip_delay = 25, + .part_probe_types = part_probes, + }, + .ctrl = { + .cmd_ctrl = falcon_hwcontrol, + .dev_ready = falcon_nand_ready, + } +}; + +static struct resource ltq_nand_res = + MEM_RES("nand", LTQ_FLASH_START, LTQ_FLASH_MAX); + +static struct platform_device ltq_flash_nand = { + .name = "gen_nand", + .id = -1, + .num_resources = 1, + .resource = <q_nand_res, + .dev = { + .platform_data = &falcon_flash_nand_data, + }, +}; + +void __init +falcon_register_nand(void) +{ + platform_device_register(<q_flash_nand); +} + +/* gpio */ +#define DECLARE_GPIO_RES(port) \ +static struct resource falcon_gpio ## port ## _res[] = { \ + MEM_RES("gpio"#port, LTQ_GPIO ## port ## _BASE_ADDR, \ + LTQ_GPIO ## port ## _SIZE), \ + MEM_RES("padctrl"#port, LTQ_PADCTRL ## port ## _BASE_ADDR, \ + LTQ_PADCTRL ## port ## _SIZE), \ + IRQ_RES("gpio_mux"#port, FALCON_IRQ_GPIO_P ## port) \ +} +DECLARE_GPIO_RES(0); +DECLARE_GPIO_RES(1); +DECLARE_GPIO_RES(2); +DECLARE_GPIO_RES(3); +DECLARE_GPIO_RES(4); + +void __init +falcon_register_gpio(void) +{ + platform_device_register_simple("falcon_gpio", 0, + falcon_gpio0_res, ARRAY_SIZE(falcon_gpio0_res)); + platform_device_register_simple("falcon_gpio", 1, + falcon_gpio1_res, ARRAY_SIZE(falcon_gpio1_res)); + platform_device_register_simple("falcon_gpio", 2, + falcon_gpio2_res, ARRAY_SIZE(falcon_gpio2_res)); +} + +void __init +falcon_register_gpio_extra(void) +{ + platform_device_register_simple("falcon_gpio", 3, + falcon_gpio3_res, ARRAY_SIZE(falcon_gpio3_res)); + platform_device_register_simple("falcon_gpio", 4, + falcon_gpio4_res, ARRAY_SIZE(falcon_gpio4_res)); +} + +/* spi flash */ +static struct platform_device ltq_spi = { + .name = "falcon_spi", + .num_resources = 0, +}; + +void __init +falcon_register_spi_flash(struct spi_board_info *data) +{ + spi_register_board_info(data, 1); + platform_device_register(<q_spi); +} + +/* i2c */ +static struct resource falcon_i2c_resources[] = { + MEM_RES("i2c", GPON_I2C_BASE, GPON_I2C_SIZE), + IRQ_RES(i2c_lb, FALCON_IRQ_I2C_LBREQ), + IRQ_RES(i2c_b, FALCON_IRQ_I2C_BREQ), + IRQ_RES(i2c_err, FALCON_IRQ_I2C_I2C_ERR), + IRQ_RES(i2c_p, FALCON_IRQ_I2C_I2C_P), +}; + +void __init +falcon_register_i2c(void) +{ + platform_device_register_simple("i2c-falcon", 0, + falcon_i2c_resources, ARRAY_SIZE(falcon_i2c_resources)); +} |