| 1 | /* |
| 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. |
| 5 | * |
| 6 | * Copyright (C) 2011 Thomas Langer <thomas.langer@lantiq.com> |
| 7 | * Copyright (C) 2011 John Crispin <blogic@openwrt.org> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/platform_device.h> |
| 11 | #include <linux/mtd/nand.h> |
| 12 | #include <linux/gpio.h> |
| 13 | |
| 14 | #include <lantiq_soc.h> |
| 15 | |
| 16 | #include "devices.h" |
| 17 | |
| 18 | /* nand flash */ |
| 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 |
| 26 | |
| 27 | static const char *part_probes[] = { "cmdlinepart", NULL }; |
| 28 | |
| 29 | static int |
| 30 | falcon_nand_ready(struct mtd_info *mtd) |
| 31 | { |
| 32 | u32 modcon = ltq_ebu_r32(LTQ_EBU_MODCON); |
| 33 | |
| 34 | return (((modcon & (MODCON_STS | MODCON_STSEDGE)) == |
| 35 | (MODCON_STS | MODCON_STSEDGE))); |
| 36 | } |
| 37 | |
| 38 | static void |
| 39 | falcon_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) |
| 40 | { |
| 41 | struct nand_chip *this = mtd->priv; |
| 42 | unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; |
| 43 | |
| 44 | if (ctrl & NAND_CTRL_CHANGE) { |
| 45 | nandaddr &= ~(NAND_ADDR_ALE | NAND_ADDR_CLE); |
| 46 | |
| 47 | if (ctrl & NAND_CLE) |
| 48 | nandaddr |= NAND_ADDR_CLE; |
| 49 | if (ctrl & NAND_ALE) |
| 50 | nandaddr |= NAND_ADDR_ALE; |
| 51 | |
| 52 | this->IO_ADDR_W = (void __iomem *) nandaddr; |
| 53 | } |
| 54 | |
| 55 | if (cmd != NAND_CMD_NONE) |
| 56 | writeb(cmd, this->IO_ADDR_W); |
| 57 | } |
| 58 | |
| 59 | static struct platform_nand_data falcon_flash_nand_data = { |
| 60 | .chip = { |
| 61 | .nr_chips = 1, |
| 62 | .chip_delay = 25, |
| 63 | .part_probe_types = part_probes, |
| 64 | }, |
| 65 | .ctrl = { |
| 66 | .cmd_ctrl = falcon_hwcontrol, |
| 67 | .dev_ready = falcon_nand_ready, |
| 68 | } |
| 69 | }; |
| 70 | |
| 71 | static struct resource ltq_nand_res = |
| 72 | MEM_RES("nand", LTQ_FLASH_START, LTQ_FLASH_MAX); |
| 73 | |
| 74 | static struct platform_device ltq_flash_nand = { |
| 75 | .name = "gen_nand", |
| 76 | .id = -1, |
| 77 | .num_resources = 1, |
| 78 | .resource = <q_nand_res, |
| 79 | .dev = { |
| 80 | .platform_data = &falcon_flash_nand_data, |
| 81 | }, |
| 82 | }; |
| 83 | |
| 84 | void __init |
| 85 | falcon_register_nand(void) |
| 86 | { |
| 87 | platform_device_register(<q_flash_nand); |
| 88 | } |
| 89 | |
| 90 | /* gpio */ |
| 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) \ |
| 98 | } |
| 99 | DECLARE_GPIO_RES(0); |
| 100 | DECLARE_GPIO_RES(1); |
| 101 | DECLARE_GPIO_RES(2); |
| 102 | DECLARE_GPIO_RES(3); |
| 103 | DECLARE_GPIO_RES(4); |
| 104 | |
| 105 | void __init |
| 106 | falcon_register_gpio(void) |
| 107 | { |
| 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)); |
| 114 | } |
| 115 | |
| 116 | void __init |
| 117 | falcon_register_gpio_extra(void) |
| 118 | { |
| 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)); |
| 123 | } |
| 124 | |
| 125 | /* spi flash */ |
| 126 | static struct platform_device ltq_spi = { |
| 127 | .name = "falcon_spi", |
| 128 | .num_resources = 0, |
| 129 | }; |
| 130 | |
| 131 | void __init |
| 132 | falcon_register_spi_flash(struct spi_board_info *data) |
| 133 | { |
| 134 | spi_register_board_info(data, 1); |
| 135 | platform_device_register(<q_spi); |
| 136 | } |
| 137 | |
| 138 | /* i2c */ |
| 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), |
| 145 | }; |
| 146 | |
| 147 | void __init |
| 148 | falcon_register_i2c(void) |
| 149 | { |
| 150 | platform_device_register_simple("i2c-falcon", 0, |
| 151 | falcon_i2c_resources, ARRAY_SIZE(falcon_i2c_resources)); |
| 152 | } |
| 153 | |
