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162 lines
4.0 KiB
162 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* arch/arm/mach-ep93xx/snappercl15.c |
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* Bluewater Systems Snapper CL15 system module |
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* |
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* Copyright (C) 2009 Bluewater Systems Ltd |
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* Author: Ryan Mallon |
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* |
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* NAND code adapted from driver by: |
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* Andre Renaud <[email protected]> |
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* James R. McKaskill |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/i2c.h> |
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#include <linux/fb.h> |
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#include <linux/mtd/platnand.h> |
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#include "hardware.h" |
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#include <linux/platform_data/video-ep93xx.h> |
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#include "gpio-ep93xx.h" |
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#include <asm/mach-types.h> |
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#include <asm/mach/arch.h> |
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#include "soc.h" |
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#define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M) |
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#define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */ |
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#define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */ |
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#define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */ |
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#define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */ |
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#define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */ |
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#define NAND_CTRL_ADDR(chip) (chip->legacy.IO_ADDR_W + 0x40) |
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static void snappercl15_nand_cmd_ctrl(struct nand_chip *chip, int cmd, |
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unsigned int ctrl) |
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{ |
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static u16 nand_state = SNAPPERCL15_NAND_WPN; |
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u16 set; |
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if (ctrl & NAND_CTRL_CHANGE) { |
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set = SNAPPERCL15_NAND_CEN | SNAPPERCL15_NAND_WPN; |
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if (ctrl & NAND_NCE) |
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set &= ~SNAPPERCL15_NAND_CEN; |
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if (ctrl & NAND_CLE) |
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set |= SNAPPERCL15_NAND_CLE; |
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if (ctrl & NAND_ALE) |
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set |= SNAPPERCL15_NAND_ALE; |
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nand_state &= ~(SNAPPERCL15_NAND_CEN | |
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SNAPPERCL15_NAND_CLE | |
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SNAPPERCL15_NAND_ALE); |
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nand_state |= set; |
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__raw_writew(nand_state, NAND_CTRL_ADDR(chip)); |
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} |
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if (cmd != NAND_CMD_NONE) |
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__raw_writew((cmd & 0xff) | nand_state, |
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chip->legacy.IO_ADDR_W); |
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} |
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static int snappercl15_nand_dev_ready(struct nand_chip *chip) |
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{ |
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return !!(__raw_readw(NAND_CTRL_ADDR(chip)) & SNAPPERCL15_NAND_RDY); |
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} |
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static struct mtd_partition snappercl15_nand_parts[] = { |
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{ |
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.name = "Kernel", |
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.offset = 0, |
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.size = SZ_2M, |
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}, |
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{ |
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.name = "Filesystem", |
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.offset = MTDPART_OFS_APPEND, |
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.size = MTDPART_SIZ_FULL, |
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}, |
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}; |
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static struct platform_nand_data snappercl15_nand_data = { |
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.chip = { |
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.nr_chips = 1, |
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.partitions = snappercl15_nand_parts, |
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.nr_partitions = ARRAY_SIZE(snappercl15_nand_parts), |
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.chip_delay = 25, |
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}, |
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.ctrl = { |
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.dev_ready = snappercl15_nand_dev_ready, |
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.cmd_ctrl = snappercl15_nand_cmd_ctrl, |
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}, |
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}; |
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static struct resource snappercl15_nand_resource[] = { |
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{ |
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.start = SNAPPERCL15_NAND_BASE, |
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.end = SNAPPERCL15_NAND_BASE + SZ_4K - 1, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct platform_device snappercl15_nand_device = { |
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.name = "gen_nand", |
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.id = -1, |
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.dev.platform_data = &snappercl15_nand_data, |
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.resource = snappercl15_nand_resource, |
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.num_resources = ARRAY_SIZE(snappercl15_nand_resource), |
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}; |
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static struct ep93xx_eth_data __initdata snappercl15_eth_data = { |
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.phy_id = 1, |
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}; |
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static struct i2c_board_info __initdata snappercl15_i2c_data[] = { |
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{ |
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/* Audio codec */ |
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I2C_BOARD_INFO("tlv320aic23", 0x1a), |
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}, |
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}; |
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static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = { |
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}; |
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static struct platform_device snappercl15_audio_device = { |
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.name = "snappercl15-audio", |
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.id = -1, |
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}; |
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static void __init snappercl15_register_audio(void) |
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{ |
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ep93xx_register_i2s(); |
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platform_device_register(&snappercl15_audio_device); |
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} |
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static void __init snappercl15_init_machine(void) |
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{ |
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ep93xx_init_devices(); |
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ep93xx_register_eth(&snappercl15_eth_data, 1); |
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ep93xx_register_i2c(snappercl15_i2c_data, |
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ARRAY_SIZE(snappercl15_i2c_data)); |
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ep93xx_register_fb(&snappercl15_fb_info); |
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snappercl15_register_audio(); |
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platform_device_register(&snappercl15_nand_device); |
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} |
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MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15") |
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/* Maintainer: Ryan Mallon */ |
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.atag_offset = 0x100, |
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.nr_irqs = NR_EP93XX_IRQS, |
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.map_io = ep93xx_map_io, |
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.init_irq = ep93xx_init_irq, |
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.init_time = ep93xx_timer_init, |
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.init_machine = snappercl15_init_machine, |
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.restart = ep93xx_restart, |
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MACHINE_END
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