2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * Copyright (C) 2011 Thomas Langer <thomas.langer@lantiq.com>
7 * Copyright (C) 2011 John Crispin <blogic@openwrt.org>
10 #include <linux/platform_device.h>
11 #include <linux/mtd/nand.h>
12 #include <linux/gpio.h>
14 #include <lantiq_soc.h>
19 /* address lines used for NAND control signals */
20 #define NAND_ADDR_ALE 0x10000
21 #define NAND_ADDR_CLE 0x20000
22 /* Ready/Busy Status */
23 #define MODCON_STS 0x0002
24 /* Ready/Busy Status Edge */
25 #define MODCON_STSEDGE 0x0004
27 static const char *part_probes[] = { "cmdlinepart", NULL };
30 falcon_nand_ready(struct mtd_info *mtd)
32 u32 modcon = ltq_ebu_r32(LTQ_EBU_MODCON);
34 return (((modcon & (MODCON_STS | MODCON_STSEDGE)) ==
35 (MODCON_STS | MODCON_STSEDGE)));
39 falcon_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
41 struct nand_chip *this = mtd->priv;
42 unsigned long nandaddr = (unsigned long) this->IO_ADDR_W;
44 if (ctrl & NAND_CTRL_CHANGE) {
45 nandaddr &= ~(NAND_ADDR_ALE | NAND_ADDR_CLE);
48 nandaddr |= NAND_ADDR_CLE;
50 nandaddr |= NAND_ADDR_ALE;
52 this->IO_ADDR_W = (void __iomem *) nandaddr;
55 if (cmd != NAND_CMD_NONE)
56 writeb(cmd, this->IO_ADDR_W);
59 static struct platform_nand_data falcon_flash_nand_data = {
63 .part_probe_types = part_probes,
66 .cmd_ctrl = falcon_hwcontrol,
67 .dev_ready = falcon_nand_ready,
71 static struct resource ltq_nand_res =
72 MEM_RES("nand", LTQ_FLASH_START, LTQ_FLASH_MAX);
74 static struct platform_device ltq_flash_nand = {
78 .resource = <q_nand_res,
80 .platform_data = &falcon_flash_nand_data,
85 falcon_register_nand(void)
87 platform_device_register(<q_flash_nand);
91 #define DECLARE_GPIO_RES(port) \
92 static struct resource falcon_gpio ## port ## _res[] = { \
93 MEM_RES("gpio"#port, LTQ_GPIO ## port ## _BASE_ADDR, \
94 LTQ_GPIO ## port ## _SIZE), \
95 MEM_RES("padctrl"#port, LTQ_PADCTRL ## port ## _BASE_ADDR, \
96 LTQ_PADCTRL ## port ## _SIZE), \
97 IRQ_RES("gpio_mux"#port, FALCON_IRQ_GPIO_P ## port) \
106 falcon_register_gpio(void)
108 platform_device_register_simple("falcon_gpio", 0,
109 falcon_gpio0_res, ARRAY_SIZE(falcon_gpio0_res));
110 platform_device_register_simple("falcon_gpio", 1,
111 falcon_gpio1_res, ARRAY_SIZE(falcon_gpio1_res));
112 platform_device_register_simple("falcon_gpio", 2,
113 falcon_gpio2_res, ARRAY_SIZE(falcon_gpio2_res));
117 falcon_register_gpio_extra(void)
119 platform_device_register_simple("falcon_gpio", 3,
120 falcon_gpio3_res, ARRAY_SIZE(falcon_gpio3_res));
121 platform_device_register_simple("falcon_gpio", 4,
122 falcon_gpio4_res, ARRAY_SIZE(falcon_gpio4_res));
126 static struct platform_device ltq_spi = {
127 .name = "falcon_spi",
132 falcon_register_spi_flash(struct spi_board_info *data)
134 spi_register_board_info(data, 1);
135 platform_device_register(<q_spi);
139 static struct resource falcon_i2c_resources[] = {
140 MEM_RES("i2c", GPON_I2C_BASE, GPON_I2C_SIZE),
141 IRQ_RES(i2c_lb, FALCON_IRQ_I2C_LBREQ),
142 IRQ_RES(i2c_b, FALCON_IRQ_I2C_BREQ),
143 IRQ_RES(i2c_err, FALCON_IRQ_I2C_I2C_ERR),
144 IRQ_RES(i2c_p, FALCON_IRQ_I2C_I2C_P),
148 falcon_register_i2c(void)
150 platform_device_register_simple("i2c-falcon", 0,
151 falcon_i2c_resources, ARRAY_SIZE(falcon_i2c_resources));